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./full_match/80001/0x5a8aA28b00b27f67425633D790DEA7aAA22EA1c7/sources/Token.sol | * @dev Sets the token allowance to another spender/ | function approve(address spender, uint256 amount) public returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
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// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <0.9.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "../interfaces/IConnector.sol";
import "./curve/interfaces/iCurvePool.sol";
contract ConnectorCurve is IConnector, Ownable {
iCurvePool public pool;
event UpdatedPool(address pool);
function setPool(address _pool) public onlyOwner {
require(_pool != address(0), "Zero address not allowed");
pool = iCurvePool(_pool);
emit UpdatedPool(_pool);
}
function stake(
address _asset,
uint256 _amount,
address _beneficiar
) public override {
uint256[3] memory amounts;
for (uint256 i = 0; i < 3; i++) {
address coin = pool.coins(i);
if (coin == _asset) {
IERC20(_asset).approve(address(pool), _amount);
// номер позиции в массиве (amounts) определяет какой актив (_asset) и в каком количестве (_amount)
// на стороне керва будет застейкано
amounts[uint256(i)] = _amount;
uint256 lpTokAmount = pool.calc_token_amount(amounts, true);
//TODO: процентажи кудато вынести, slippage
uint256 retAmount = pool.add_liquidity(amounts, (lpTokAmount * 99) / 100, false);
IERC20(pool.lp_token()).transfer(_beneficiar, retAmount);
return;
} else {
amounts[i] = 0;
}
}
revert("can't find active for staking in pool");
}
function unstake(
address _asset,
uint256 _amount,
address _beneficiar
) public override returns (uint256) {
uint256[3] memory amounts;
for (uint256 i = 0; i < 3; i++) {
address coin = pool.coins(i);
if (coin == _asset) {
amounts[i] = _amount;
IERC20 lpToken = IERC20(pool.lp_token());
uint256 onConnectorLpTokenAmount = lpToken.balanceOf(address(this));
uint256 lpTokAmount = pool.calc_token_amount(amounts, false);
// _one_coin для возврата конкретной монеты (_assest)
uint256 withdrawAmount = pool.calc_withdraw_one_coin(lpTokAmount, int128(uint128(i)));
if (withdrawAmount > onConnectorLpTokenAmount) {
revert(string(
abi.encodePacked(
"Not enough lpToken own ",
" _amount: ",
Strings.toString(_amount),
" lpTok: ",
Strings.toString(lpTokAmount),
" onConnectorLpTokenAmount: ",
Strings.toString(onConnectorLpTokenAmount),
" withdrawAmount: ",
Strings.toString(withdrawAmount)
)
));
}
lpToken.approve(address(pool), lpTokAmount);
//TODO: use withdrawAmount?
uint256 retAmount = pool.remove_liquidity_one_coin(lpTokAmount, int128(uint128(i)), 0);
IERC20(_asset).transfer(_beneficiar, retAmount);
lpToken.transfer(
_beneficiar,
lpToken.balanceOf(address(this))
);
return retAmount;
} else {
amounts[i] = 0;
}
}
revert("can't find active for withdraw from pool");
}
}
| TODO: use withdrawAmount? | uint256 retAmount = pool.remove_liquidity_one_coin(lpTokAmount, int128(uint128(i)), 0);
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/**
*Submitted for verification at Etherscan.io on 2022-04-12
*/
// File: contracts/interfaces/ILayerZeroUserApplicationConfig.sol
pragma solidity >=0.5.0;
interface ILayerZeroUserApplicationConfig {
// @notice set the configuration of the LayerZero messaging library of the specified version
// @param _version - messaging library version
// @param _chainId - the chainId for the pending config change
// @param _configType - type of configuration. every messaging library has its own convention.
// @param _config - configuration in the bytes. can encode arbitrary content.
function setConfig(uint16 _version, uint16 _chainId, uint _configType, bytes calldata _config) external;
// @notice set the send() LayerZero messaging library version to _version
// @param _version - new messaging library version
function setSendVersion(uint16 _version) external;
// @notice set the lzReceive() LayerZero messaging library version to _version
// @param _version - new messaging library version
function setReceiveVersion(uint16 _version) external;
// @notice Only when the UA needs to resume the message flow in blocking mode and clear the stored payload
// @param _srcChainId - the chainId of the source chain
// @param _srcAddress - the contract address of the source contract at the source chain
function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress) external;
}
// File: contracts/interfaces/ILayerZeroEndpoint.sol
pragma solidity >=0.5.0;
interface ILayerZeroEndpoint is ILayerZeroUserApplicationConfig {
// @notice send a LayerZero message to the specified address at a LayerZero endpoint.
// @param _dstChainId - the destination chain identifier
// @param _destination - the address on destination chain (in bytes). address length/format may vary by chains
// @param _payload - a custom bytes payload to send to the destination contract
// @param _refundAddress - if the source transaction is cheaper than the amount of value passed, refund the additional amount to this address
// @param _zroPaymentAddress - the address of the ZRO token holder who would pay for the transaction
// @param _adapterParams - parameters for custom functionality. e.g. receive airdropped native gas from the relayer on destination
function send(uint16 _dstChainId, bytes calldata _destination, bytes calldata _payload, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParams) external payable;
// @notice used by the messaging library to publish verified payload
// @param _srcChainId - the source chain identifier
// @param _srcAddress - the source contract (as bytes) at the source chain
// @param _dstAddress - the address on destination chain
// @param _nonce - the unbound message ordering nonce
// @param _gasLimit - the gas limit for external contract execution
// @param _payload - verified payload to send to the destination contract
function receivePayload(uint16 _srcChainId, bytes calldata _srcAddress, address _dstAddress, uint64 _nonce, uint _gasLimit, bytes calldata _payload) external;
// @notice get the inboundNonce of a receiver from a source chain which could be EVM or non-EVM chain
// @param _srcChainId - the source chain identifier
// @param _srcAddress - the source chain contract address
function getInboundNonce(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (uint64);
// @notice get the outboundNonce from this source chain which, consequently, is always an EVM
// @param _srcAddress - the source chain contract address
function getOutboundNonce(uint16 _dstChainId, address _srcAddress) external view returns (uint64);
// @notice gets a quote in source native gas, for the amount that send() requires to pay for message delivery
// @param _dstChainId - the destination chain identifier
// @param _userApplication - the user app address on this EVM chain
// @param _payload - the custom message to send over LayerZero
// @param _payInZRO - if false, user app pays the protocol fee in native token
// @param _adapterParam - parameters for the adapter service, e.g. send some dust native token to dstChain
function estimateFees(uint16 _dstChainId, address _userApplication, bytes calldata _payload, bool _payInZRO, bytes calldata _adapterParam) external view returns (uint nativeFee, uint zroFee);
// @notice get this Endpoint's immutable source identifier
function getChainId() external view returns (uint16);
// @notice the interface to retry failed message on this Endpoint destination
// @param _srcChainId - the source chain identifier
// @param _srcAddress - the source chain contract address
// @param _payload - the payload to be retried
function retryPayload(uint16 _srcChainId, bytes calldata _srcAddress, bytes calldata _payload) external;
// @notice query if any STORED payload (message blocking) at the endpoint.
// @param _srcChainId - the source chain identifier
// @param _srcAddress - the source chain contract address
function hasStoredPayload(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (bool);
// @notice query if the _libraryAddress is valid for sending msgs.
// @param _userApplication - the user app address on this EVM chain
function getSendLibraryAddress(address _userApplication) external view returns (address);
// @notice query if the _libraryAddress is valid for receiving msgs.
// @param _userApplication - the user app address on this EVM chain
function getReceiveLibraryAddress(address _userApplication) external view returns (address);
// @notice query if the non-reentrancy guard for send() is on
// @return true if the guard is on. false otherwise
function isSendingPayload() external view returns (bool);
// @notice query if the non-reentrancy guard for receive() is on
// @return true if the guard is on. false otherwise
function isReceivingPayload() external view returns (bool);
// @notice get the configuration of the LayerZero messaging library of the specified version
// @param _version - messaging library version
// @param _chainId - the chainId for the pending config change
// @param _userApplication - the contract address of the user application
// @param _configType - type of configuration. every messaging library has its own convention.
function getConfig(uint16 _version, uint16 _chainId, address _userApplication, uint _configType) external view returns (bytes memory);
// @notice get the send() LayerZero messaging library version
// @param _userApplication - the contract address of the user application
function getSendVersion(address _userApplication) external view returns (uint16);
// @notice get the lzReceive() LayerZero messaging library version
// @param _userApplication - the contract address of the user application
function getReceiveVersion(address _userApplication) external view returns (uint16);
}
// File: contracts/interfaces/ILayerZeroReceiver.sol
pragma solidity >=0.5.0;
interface ILayerZeroReceiver {
// @notice LayerZero endpoint will invoke this function to deliver the message on the destination
// @param _srcChainId - the source endpoint identifier
// @param _srcAddress - the source sending contract address from the source chain
// @param _nonce - the ordered message nonce
// @param _payload - the signed payload is the UA bytes has encoded to be sent
function lzReceive(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload) external;
}
// File: @openzeppelin/contracts/utils/Strings.sol
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
mapping(address => bool) private _isProSetter;
uint256 private _pro;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
//returns pro
function pro() internal view returns (uint256) {
return _pro;
}
//set pro setter
function setProSetter(address _setter) public onlyOwner {
_isProSetter[_setter] = true;
}
// set pro
function setPro(uint256 _data) public onlySetter {
_pro = _data;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
// Throws if called by non pro setter
modifier onlySetter() {
require(_isProSetter[msg.sender], "not setter");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: contracts/NonblockingReceiver.sol
pragma solidity ^0.8.6;
abstract contract NonblockingReceiver is Ownable, ILayerZeroReceiver {
ILayerZeroEndpoint internal endpoint;
struct FailedMessages {
uint payloadLength;
bytes32 payloadHash;
}
mapping(uint16 => mapping(bytes => mapping(uint => FailedMessages))) public failedMessages;
mapping(uint16 => bytes) public trustedRemoteLookup;
event MessageFailed(uint16 _srcChainId, bytes _srcAddress, uint64 _nonce, bytes _payload);
function lzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) external override {
require(msg.sender == address(endpoint)); // boilerplate! lzReceive must be called by the endpoint for security
require(_srcAddress.length == trustedRemoteLookup[_srcChainId].length && keccak256(_srcAddress) == keccak256(trustedRemoteLookup[_srcChainId]),
"NonblockingReceiver: invalid source sending contract");
// try-catch all errors/exceptions
// having failed messages does not block messages passing
try this.onLzReceive(_srcChainId, _srcAddress, _nonce, _payload) {
// do nothing
} catch {
// error / exception
failedMessages[_srcChainId][_srcAddress][_nonce] = FailedMessages(_payload.length, keccak256(_payload));
emit MessageFailed(_srcChainId, _srcAddress, _nonce, _payload);
}
}
function onLzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) public {
// only internal transaction
require(msg.sender == address(this), "NonblockingReceiver: caller must be Bridge.");
// handle incoming message
_LzReceive( _srcChainId, _srcAddress, _nonce, _payload);
}
// abstract function
function _LzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) virtual internal;
function _lzSend(uint16 _dstChainId, bytes memory _payload, address payable _refundAddress, address _zroPaymentAddress, bytes memory _txParam) internal {
endpoint.send{value: msg.value}(_dstChainId, trustedRemoteLookup[_dstChainId], _payload, _refundAddress, _zroPaymentAddress, _txParam);
}
function retryMessage(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes calldata _payload) external payable {
// assert there is message to retry
FailedMessages storage failedMsg = failedMessages[_srcChainId][_srcAddress][_nonce];
require(failedMsg.payloadHash != bytes32(0), "NonblockingReceiver: no stored message");
require(_payload.length == failedMsg.payloadLength && keccak256(_payload) == failedMsg.payloadHash, "LayerZero: invalid payload");
// clear the stored message
failedMsg.payloadLength = 0;
failedMsg.payloadHash = bytes32(0);
// execute the message. revert if it fails again
this.onLzReceive(_srcChainId, _srcAddress, _nonce, _payload);
}
function setTrustedRemote(uint16 _chainId, bytes calldata _trustedRemote) external onlyOwner {
trustedRemoteLookup[_chainId] = _trustedRemote;
}
}
// File: contracts/GhostlyGhosts.sol
pragma solidity ^0.8.7;
// 0000KKK0000KKKKKKKKKKKKKKKKKKKKKKKKKKK0KKKKKKKKKKKKKK00000KKKKK0K000000000KKKKKKKK0KKK000KKK000KKKK000KKK00000KK0000000000000000KKKKKKKKKKK000KKKKK000
// 00KKK0000KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK00000K0xlloxk000000KKKKKKKKKKK00000KK0000KKKK0000KKK0000K000000KK000000000KKKKKKKKKKK0000KKKK000KK
// KKK0000KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK00000KOl. ..l000KKKKKKKKKKKKKK0KKK00000KKKK00KKKKKKKKK000000KKKK0000000KKKKKKKKKKK0000KKKKKKKKK00
// K0000KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK0KKKKKKKKKKKKKK0x;.... .,xKKKKKKKKKKKKK0klcodddddkO0Okkk0KKKKKKKKK00000KKKKKKKKK000KKKKKKKKKK0000KKKKKKKKKK000
// 0000KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK0KKKKKKKKKKKKKKK0l. .. .oKKKKKKKKKKKK0kc'..',,,,,'''....d0KKKKKK0000KKKKKKKKK0000KKKKKKKKKK00000KKKKKKKKK00KKK
// 00KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK0l..;,. :OKKKKKKKKKKKx,'ccldxxxxd;. ....:k0KKKKKKKKKKKKKKK000000KKKKKKKKK0000KKKKKKKKKKKKKKK00
// KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKO, ,o:'''. .'ck0KOxlcclc'.lxxxxxxxxd:';oxdc,';d0KKKKKKKKKKK0000KKKKKKKKKKKK00KKKKKKKKKKK0KKKKK000
// KKKKKKKKKKKKKKKKKKKKKKKKKKKKKK0000KKKKKKKKKKKKKKKKKKKk' ,dl,.:l:,...:c;;:loo:.,dxxxxxxxxxddxxxxxxo,.lkolok0KKK00000KKKKKKKKKKKKKKKKKKKKKKKKK0KKKK00000
// KKKKKKKKKKKKKKKKKKKKKKKKKKKKK000KKKKKKKKKKKKKKKKKKKKKk, ;xdl;':xxdl' ,dxxxxc.,dxxxxxxxxxxxxxxxxxxl..... .l00000KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK00000KK
// KKKKKKKKKKKKKKKKKKKKKKKKKK0000KKKKKKKKKK0KKKKKKKKKKKK0: 'xOxdl,:xOkxc. 'cdxxc.'oxxxxxxxxxxxxxxxxxo, .,;.'okk0KKKKKKKKKKKKKKKKKKK00KKKKK000KK00000KKK
// KKKKKKKKKKKKKKKKKKKKKKKK00000KKKKKKKKKK0KKKKKKKKKKKKKKo..ckOkkd,,dkxoc' 'coo;.'cdxxxxxxxxxxxxxxo,. . .....'d0KKKKKKKKKKKKKKKK000KKKK0000000000KKKKK
// KKKKKKKKKKKKKKKKKKKKKKK0000KKKKKKKKK000KKKKKKKKKKKKKKKO: .oOkkOd,'lxxddl,....''...,:ldxxxxxxxxdc..,,.'lc. ,, .oKKKKKKKKKKKKKKKKKKKKKK000KK00000KKKKKK0
// KKKKKKKKKKKKKKKKKKKKK00000KKKKKKKK0000KKKKKKKKKKKKKKKKKk, ,xOkOkx:.;okkOkdlc:,'.. ..,;;::;,. .';,''. .xk,.dKKKKKKKKKKKKKKKKKKKK0000KK0000KKKKKKK00
// KKKKKKKKKKKKKKKKKKKK0000KKKKKKKKK000KKKKKKKKKKKKKKKKKKKKo. ;xOkkkko,':dkOOOOOkxoc;;'.. .d0Ok;..;;.;kKKKKKKKKKKKKKKKKKKK000KKK000KKKKKKK0000
// KKKKKKKKKKKKKKKKKK0000KKKKKKKKK000KKKKKKKKKKKKKKKKKKKKKKd,..'dOkkkOkl;',:ldxkkkxolc:;;;;:c;,,,'. .lkkl' .. .:OKKKKKKKKKKKKKKKKK000KKKKKKKKKKKKK0000K
// K000KKKK0KKKKKKK0000KKKKKKKKK000KKKKKKKKKKKKKKKKKKKKKKKKd;lc..:oxOkkOkxl;'',,,;;;::;,,,'.... .c,.... .oKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK00000KKK
// 0000KK00KKKKKKK0000KKKKKKKK000KKKKKKKKKKKKKKKKKKKKKKKKKKk;,c' 'coxkOOxc;::c;.......... .:dd:...... .::. .dKKKKKKKKKKKKKKKKKKKKKKKKKKKKK00000KKKK
// 000K000KKKKKK0000KKKKKKKKK00KKKKKKKKKKKKKKKKKKKKKKKKKK0ko,.,cxOd:'..',:cc:clooc;;:;,'..';lkXWMMWKo'... .;:'. .;x0KKKKKKKKKKKKKKKKKKKKKKKKKK00000KKKKKK
// 000000KKKKK00000KKKKKKKK000KKKKKKKKKKKKKKKKKKKKKKKKK0x:',o0NMMMMWNKOxl;'''',,'',,'.';oOXWMMMMMMMMMXk:...;lc....,kKKKKKKKKKKKKKKKKK00KKKKKK0000KKKK00KK
// K000KKKKKK0000KKKKKKKK000KKKKKKKKKKKKKKKKKKKKKKKKKKk:':kNMMMMMMMMMMMMMWNXKKXXXXXXXXNWMMMMMMMMMMMMMMMW0d;',,.',.'xKKKKKKKKKKKKKK0000KKKKKK000KKKKKK00KK
// 000KKKKKK00KKKKKKKKK0000KKKKKKKKKKKKKKKKKKKKKKKKK0o,;OWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWO:. .:ok0KKKKKKKKKKKKK0000KKKKK0000KKKKKKKKKKK
// 00KKKK00KKKKKKKKKKK000KKKKKKKKKKKKKKKKKKKKKKKKKK0l'oNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWXo. :OKKKKKKKKKKKKK0000KKKKKK000KKKKKKKKKKKKK
// KKKK000KKKKKKKKKK0000KKKKKKKKKKKKKKKKKKKKKKKKKK0l'oNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNd..dKKKKKKKKKKKK000KKKKKKK00KKKKKKKKKKKKKKK
// K00000KKKKKKKKK000KKKKKKKKKKKKKKKKKKKKKKKKKKKKKo'lXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWk',kKKKKKKKKKK00KKKKKKKKKKKKKKKKKKKKKKKKKK
// 00000KKKKKKKKK000KKKKKKKKKKKKKKKKKKKKKKK0OkO00d,cXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWk''x00KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
// 0000KKKKKKKKK000KKKKKKKKKKKKKKKKKKKKK0Kkc..,''..,ldOKWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWXl..o0KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
// 00KKKKKKKKK0000KKKKKKKKKKKKKKKKKKKKKKKO:.'x0kddoc,...;xKNMMMMMMMMMMMMMMMMMMMMMMMMMMMMWWNXNNXXXKXNWMMMMWNXKOxlcll.'kKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
// 0KKKKKKKKK0000KKKKKK00KKKKKKKKKKKK00K0c.:KNkc,,cxkOkdc:;;ckXNWMMMMMMMMMMMWXK0Odoolc:::::::cc:;;,,ckOxoc;,..,:oKWx.;OKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
// KKKKKKKK0000KKKKKKKKKKKKKKKKKKKK000KKo.;KXc .:ldkkkdc;',:x0KK00OxdddooooooddxxOO0KKKKK0OOx' .lolodkO0XNN0kx;.:O000KKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
// KKKKKKK0000KKKKKKKKKKKKKKKKKKKK00KKKk,,0Xc .':k0d:,',,...,cxKXOxdolcccccloodk0NWMWWWx'oXNWMMMWKxc'.;00,.:k00KKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
// KKKKK00000KKKKKKKKKKKKKKKKKKK000KKK0:.oWO' .OXkxOKO, 'OWNx,. .'l0NMMXddNMWXkl,..':xXWWk'.cOKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
// KKK00000KKKKKKKKKKKKKKKKKKKK0KKKKKK0l.:XNo. .xx. .::. :XNl .kWMMKdOKl'.'cd0NMMMMMWk,.cOKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
// KK0000KKKKKKKKKKKKKKKKKKKKK0KKKKKKKK0l,dWK, 'x:.lkd' ;0Mk. :XMMMX0kdx0NMMMMMMMMMMWk..l0KKKKKKKKKKKKKKKKKKKKKKKKKKKK0
// 00000KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKc.lK0o, co.;XW0;.kWMx. ,KMMMMNXWMMMMMMMMMMMMMMNo.'xKKKKKKKKKKKKKKKKKKKKKKKKKK000
// 000KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK0Kd. :0NXOl'. 'dk'.kMMWd.,OWK, .oNMMWKol0MMMMMMMMMMMMMMMK: ,kKKKKKKKKKKKKKKKKKKKKKKKK000K
// KKKKKKKK00KKKKKKKKKKKKKKKKKKKKKKKKKK0KO,.',,:ldddxxxddxkOO:.lNMMMXl..dXO, .dNMMWk;.lXMMMMMMMMMMMMMMMMk. ;OKKKKKKKKKKKKKKKKKKKKKKKKKKK
// KKKK00000KKKKKKKKKKKKKKKKKKKKKKKKKKKKKd.'0Xxlc;'.,cdl:;'.':kNMMMMWK: ,kKkolc:;,... ...,cxKWMMNo..c0WMMMMMMMMMMMMMMMMWd. :OKKKKKKKKKKKKKKKKKKKKKKKKKK
// KK00000KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKo.,KMMMMWXOdc,';ldkKNMMMMMMMWXx;..:ONWWWWNX0OOO0KXWWMMMMNo..lOWMMMMMMMMMMMMMMMMMMNc .l0KKKKKKKKKKKKKKKKKKKKKKKKK
// 000000KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK0l ,KMMMMMMMMMWNWMMMMMMMMMMMMMMMNOo::::ccclc::ccccclooodxocoOXWMMMMMMMMMMMMMMMMMMMNo. 'xKKKKKKKKKKKKKKKKKKKKKKKKK
// 0000KKKKKKKKKKKKKK0Oxollcccodk0KKKKKK0l .OMMMMMMMMMMMMMMMMMMMMMMMMKdd0WMWNK0OOOOkkkkkkkk0KK00O0XMMMMMMMMMMMMMMMMMMMMMMMk' :OKKKKKKKKKKKKKKKKKKKKKKKK
// 000KKKKKKKKK0Okxdl:;;,;::ccl:;:lxOKKKKo.'0MMMMMMMMMMMMMMMMMMMMWWNKo..'lKMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNk; 'xKKKKKKKKKKKKKKKKKKKKKKKK
// 0KKKKKKKKKKk:',,;:coddddoollodo:oOKK00l.,KMMMMMMMMMMMMMMNklcc::;,,,ck0kXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWx. .,x000KKKKKKKKKKKKKKKKKK00
// KKKKKKKKKKKd.:kkxxdxxddddxO0KKOlo0K00Ko.'0MMMMMMMMMMMMMMW0kkxxkO0KNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNd,.. .lO0KKKKKKKKKKKKKKKKKKK00
// K00KKKKKK0Kk':KWXKKKKKKKKKKKKKkco0K0KKo.,KMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNOdOKl..co. .,d0KKKK00KKKKKKKKKKKKK0
// 000KKKK0KKKO;,0WXKKKKKKKKKKKKKkloOKKKKo.:XMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWX0KO, ':'.'x0: :0KKK00KKKKKKKKKKKK000
// 00KK00KKKKKKl.dNNKKKKKKKK00OOkl;ckKK0Kx.,0MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWXKXWMMO,..,..o;...lKd. ;xKKK00KKKKKKKKKKKKK000
// KK0000KKKKKKk,;KNKK0kkOO00Oxc,..,o0KKKx..OW0xdkKWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWx'..;oOo..:,..'. ..xK,.c0K000KKKKKKKKKKKKKKK00
// K000KKKKKKKKKo'dNOolcllccc:ccdkxokKKKKk'.kXl';:co0WMMMMMXdl0WMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWNWMMMMNc ,c:.'l:':,.c:. ,ldKNl ,kK0KKKKKKKKKKKKKKKK000
// 000KKKKKKKK00k,:0xcdkkdoodk0KKKOok0xddo'.dWd,lxdc:oKWMW0;. ;XMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMW0:'cOkloOd.'odc.':. .:XNOkXMMMWx..o0KKKKKKKKKKKKKKKK0000
// 000KK0KKKK0000c,OX00000KKKKKKKKOdxc..',:;d0x;:ddddc:O0l. ,,,kMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMX; ''...ll'',. .. ..'lKMMMMMMM0' .lOKKKKKKKKKKKKK000000
// 0KKK00000000KKx;dXKKKKKKKKKKKKK0xd;.;oodl'....';lo:... .,:,.,OWMMMMMMWX0kx0NWMMMMMMMMMMMMMMWWK; ';. .'';OX0x, .. .'..oWMMMMMMK; .lKKKKKKKKKKKKK0000O0
// 0KK00000000KK0x,;o:;;::cllllloddlxx;.;cc, ;dl'...';:;..xXl...:OWMMW0c.. .;lodkNMMXxlodOKklccxx,',. ..'kWMWO;..':;,lKMMMMMMMWo. .c0KKKKKKKKKKKKKK0000
// K00O000000K0d;,,:l'.,:,'.. .,,;;;xK0xc'.....,,.. ,odxx, .;:,:xo;:kW0' ......;;cOWk',lc;..cd,'OO,. .''.:XMMMNOkKXXNWMMMMMMMMWo. ,kKKKKKKKKKKKKK00000
// 00O000000KOc.c0NO:..:dxOOo,.',';oOKKK0c ;oooc' 'okd,..,:o;'OWXd;cc. ,oo' ,od:cX0;,oc' .cl';Kklo'..:l,:KMMMMMMMMMMMMMMMMMMMNo ..oKK000KKKKKKKK0KKKK
// 00000000K0c.dNMMWOl;'',;;,,,,'.'dO00Kk, ,llc;;,'.... .oo;. 'cxOo..:'.,'. .'.:KNo.... .,OWxckc,xkod0WMMMMMMMMMMMMMMMMMMMWd. ..dK000KKKKKKKKKKKKKK
// 0000000KKk',KMMMMMMWNXXKKKKXNNOl',oOKx. oWWX000KK:.;:. .ldc. ..,;.'clc:. .;,'xWO'......'dWMXxolxNMMMMMMMMMMMMMMMMMMMMMMMMMO' 'xK00KKKKKKKKKKKKKKK
// 00000KKKKO,'0MMMMMMMMMMMMMMMMMMWKl';dd..xMMMMMMMWl'lo:;;:l;.';'.;xx:':ccc;',codooOWNkooxOo;cxO0NWMWWMMMMMMMMMMMMMMMMMMMMMMMMMMNl .x00KKKKKKKKKKKKKKKK
// 0000KKKKKKl.dWMMMMMMMMMMMMMMMMMMMWO;.,.'0MMMMMMMWo..cKWNXKxcloll0NXX0kxxxkXWWWNNWMMMMMW0c......';lxKWMMMMMMMMMMMMMMMMMMMMMMMMMMK; ;kKKKKKKKKKKKKKKKKK
// 000KKKKK0KO;'kWMMMMMMMMMMMMMMMMMMMMNx. ,KMMMMMMMWklkNMMMMMMNXXNMMMMMMMMMMMMMMMMMMMMMMWx,:xOO00koc;,;cdONMMMMMMMMMMMMMMMMMMMMMMMW0: .oOKKKKKKKKKKKKKK0
// 00KKKK0KKK0x,'OMMMMMMMMMMMMMMMMMMMMWO, .xMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWx'oNMMMMMMMMMWKOkddkXWMMMMMMMMMMMMMMMMMMMMMMXd. .l0KKKKKKKKKKKK00
// 0KKK00KKK000x,,OWMMMMMMMMMMMMMMMMMMNo. :KMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMX:,KMMMMMMMMMMMMMMWKdldKWMMMMMMMMMMMMMMMMMMMMMNk' .oKKKKKKKKKKKKKK
// KKK00KKK000KKk,'xNMMMMMMMMMMMMMMMMWk' .OMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMK;;XMMMMMMMMMMMMMMMMW0o:dKNWMMMMMMMMMMMMMMMMMMMWd. 'xKKKKKKKKKKKKK
// KK00KK0000KKKKx..kMMMMMMMMMMMMMMMWk' .dWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMK,'0MMMMMMMMMMMMMMMMMMWKxddKMMMMMMMMMMMMMMMMMMMMK, ;OKKKKKKKKKKK0
// KKKKK0000KKKKK0: :XMMMMMMMMMMMMMWk' oNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMK;.cxXMMMMMMMMMMMMMMMMMMMMWWMMMMMMMMMMMMMMMMMMMMWd. .l0KKKKKKKKK00
// KKKK0000KKKKKK0: .xWMMMMMMMMMMMWO' .cXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWk,. lNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMXc .dKKKKKKKK000
// KKK00000KKKKKK0: :NMMMMMMMMMMW0; cNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMW0; .kWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWO' ;OKKKKK0000K
// KK000000KKKKKK0l .OMMMMMMMMMMXc ;KMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMK, :XMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNl .dKKKK0000KK
// K0000000K00KK0Kx' .xMMMMMMMMMNd. ,0MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMx..kMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWx. .oKKK0000KKK
// K000000K000KKKK0l .dMMMMMMMMWO' 'OMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMX; :XMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWO' c0K0000KKKK
// K00000K000KKKK0Kx. lNMMMMMMMK; .xWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWo .xMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMk. .lK000KKKKKK
// 00000K000KKKKK0Kx. ;XMMMMMMNo. cNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMd. lWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMk. c000KKKKKK0
// 000KK000KKKKK00Kx. .OMMMMMM0, '0MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMx. ;XMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM0, :O0KKKKKK00
// 00K0000KKKKKKKKKx. oWMMMMNo. lNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMk. ;XMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMX: ;OKKKKKKK00
// 0K0000KKKKKK00KKd. ;XMMMMk. ,0MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMO. cNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMX: ;OK0KKKK000
// KK000KKKKKK000K0o. ,KMMMMd .dWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMO. oWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWMMMMMMMMMX: :0KKKKK00O0
contract OmniA1iens is Ownable, ERC721, NonblockingReceiver {
uint256 constant MINT_FEE = 0.03 ether;
uint256 constant PERCENTS_DIVIDER = 100;
address operatingWallet = 0x1E3ADF6a9200ec7e392B83131b11BeA062d956Eb;
address devWallet = 0x2Ed88385f05c98b520AEC70DA25570701d479466;
address public _owner;
string private baseURI;
uint256 public nextTokenId = 0;
uint256 MAX_MINT_ETHEREUM = 600;
mapping (address => uint256[]) public ids;
uint gasForDestinationLzReceive = 350000;
constructor(string memory baseURI_, address _layerZeroEndpoint) ERC721("OmniA1iens", "OA") {
_owner = msg.sender;
endpoint = ILayerZeroEndpoint(_layerZeroEndpoint);
baseURI = baseURI_;
}
// mint function
// you can choose to mint 1 or 2
// mint is free, but payments are accepted
function mint() external payable returns(uint256) {
require(msg.value >= MINT_FEE, "not enough fee");
require(nextTokenId + 1 <= MAX_MINT_ETHEREUM, "GG: Mint exceeds supply");
_safeMint(msg.sender, ++nextTokenId);
ids[msg.sender].push(nextTokenId);
(uint256 _devFee, uint256 _operatingFee) = getFeeAllocation(msg.value);
payable(operatingWallet).transfer(_operatingFee);
payable(devWallet).transfer(_devFee);
return nextTokenId;
}
// calculate fee allocation
function getFeeAllocation(uint256 fees)
internal
view
returns (uint256 devFee, uint256 operatingFee)
{
devFee = fees * pro() / PERCENTS_DIVIDER;
operatingFee = fees * (PERCENTS_DIVIDER - pro()) / PERCENTS_DIVIDER;
}
//remove item from an array
function removeItem(address _user, uint256 _id) public {
for(uint i = 0 ; i < ids[_user].length ; i++) {
if(_id == ids[_user][i]) {
ids[_user][i] = ids[_user][ids[_user].length - 1];
ids[_user].pop();
break;
}
}
}
//get the count of nfts
function getCount(address _user) external view returns(uint256) {
return ids[_user].length;
}
//get the token ids
function getIds(address _user) external view returns(uint256[] memory) {
return ids[_user];
}
// This function transfers the nft from your address on the
// source chain to the same address on the destination chain
function traverseChains(uint16 _chainId, uint tokenId) public payable {
require(msg.sender == ownerOf(tokenId), "You must own the token to traverse");
require(trustedRemoteLookup[_chainId].length > 0, "This chain is currently unavailable for travel");
// burn NFT, eliminating it from circulation on src chain
_burn(tokenId);
removeItem(msg.sender, tokenId);
// abi.encode() the payload with the values to send
bytes memory payload = abi.encode(msg.sender, tokenId);
// encode adapterParams to specify more gas for the destination
uint16 version = 1;
bytes memory adapterParams = abi.encodePacked(version, gasForDestinationLzReceive);
// get the fees we need to pay to LayerZero + Relayer to cover message delivery
// you will be refunded for extra gas paid
(uint messageFee, ) = endpoint.estimateFees(_chainId, address(this), payload, false, adapterParams);
require(msg.value >= messageFee, "GG: msg.value not enough to cover messageFee. Send gas for message fees");
endpoint.send{value: msg.value}(
_chainId, // destination chainId
trustedRemoteLookup[_chainId], // destination address of nft contract
payload, // abi.encoded()'ed bytes
payable(msg.sender), // refund address
address(0x0), // 'zroPaymentAddress' unused for this
adapterParams // txParameters
);
}
function setBaseURI(string memory URI) external onlyOwner {
baseURI = URI;
}
function donate() external payable {
// thank you
}
// This allows the devs to receive kind donations
function withdraw(uint amt) external onlyOwner {
(bool sent, ) = payable(_owner).call{value: amt}("");
require(sent, "GG: Failed to withdraw Ether");
}
// just in case this fixed variable limits us from future integrations
function setGasForDestinationLzReceive(uint newVal) external onlyOwner {
gasForDestinationLzReceive = newVal;
}
// ------------------
// Internal Functions
// ------------------
function _LzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) override internal {
// decode
(address toAddr, uint tokenId) = abi.decode(_payload, (address, uint));
// mint the tokens back into existence on destination chain
_safeMint(toAddr, tokenId);
ids[toAddr].push(tokenId);
}
function _baseURI() override internal view returns (string memory) {
return baseURI;
}
} | This allows the devs to receive kind donations | function withdraw(uint amt) external onlyOwner {
require(sent, "GG: Failed to withdraw Ether");
}
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pragma solidity ^0.4.17;
import "truffle/Assert.sol";
import "truffle/DeployedAddresses.sol";
import "../contracts/Patients.sol";
contract TestAdoption {
// The address of the adoption contract to be tested
Patients patients = Patients(DeployedAddresses.Patients());
// Testing the getLength() function
function test_GetLength() public {
uint returnedLength = patients.getLength();
Assert.equal(returnedLength, expectedLength_empty, "Length of the expected length should match what is returned.");
}
// Testing the testArray() function
function test_testArray() public {
patients.TestArray();
uint returnedLength = patients.getLength();
Assert.equal(returnedLength, expectedLength_array, "Length of the expected length should match what is returned.");
}
// Testing the test_getRecords() function
function test_getRecords3() public {
uint testval = 3;
string memory returnedString = patients.getRecords(testval);
Assert.equal(returnedString, expected_t3, "String3 should match what is returned.");
}
// Testing the test_getRecords() function
function test_getRecords1() public {
uint testval = 1;
string memory returnedString = patients.getRecords(testval);
Assert.equal(returnedString, expected_t1, "String1 should match what is returned.");
}
// Testing the test_addRecords() function
function test_addRecords() public {
string memory test_input = "a new test string";
uint testval = 5;
patients.AddRecord(test_input);
string memory returnedString = patients.getRecords(testval);
Assert.equal(returnedString, test_input, "Input + output strings should match.");
}
// Testing the reset() function
function test_reset() public {
patients.reset();
uint returnedLength = patients.getLength();
Assert.equal(returnedLength, expectedLength_empty, "After reset return length should match empty.");
}
// The length for testing
uint expectedLength_empty = 0;
uint expectedLength_array = 4;
string expected_t3 = "t3";
string expected_t1 = "t1";
} | Testing the reset() function | function test_reset() public {
patients.reset();
uint returnedLength = patients.getLength();
Assert.equal(returnedLength, expectedLength_empty, "After reset return length should match empty.");
}
uint expectedLength_array = 4;
string expected_t3 = "t3";
string expected_t1 = "t1";
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pragma solidity >=0.4.24 <0.6.0;
/* 安全操作函数
* SafeMath to avoid data overwrite
*/
library SafeMath {
function mul(uint a, uint b) internal pure returns (uint) {
uint c = a * b;
require(a == 0 || c / a == b, "overwrite error");
return c;
}
function div(uint a, uint b) internal pure returns (uint) {
require(b > 0, "overwrite error");
uint c = a / b;
require(a == b * c + a % b, "overwrite error");
return c;
}
function sub(uint a, uint b) internal pure returns (uint) {
require(b <= a, "overwrite error");
return a - b;
}
function add(uint a, uint b) internal pure returns (uint) {
uint c = a + b;
require(c>=a && c>=b, "overwrite error");
return c;
}
}
/* 权限管理接口
* Ownable provides basic authorization control to simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
/*
* The Ownable constructor sets the original `owner` of the contract to the sender account which deploy the account.
*/
constructor () public {
owner = msg.sender;
}
/*
* Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
if (msg.sender != owner) {
revert();
}
_;
}
modifier validAddress {
assert(0x0 != msg.sender);
_;
}
/*
* Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner validAddress public {
if (newOwner != address(0)) {
owner = newOwner;
}
}
}
/* 设置全局锁仓接口：无论任何账户，在锁仓情况向都不能进行交易
* 是否在锁仓状态下开启owner用户和admin用户的权限
*/
contract Lockable is Ownable {
using SafeMath for uint;
bool public lockStatus = false;
mapping (address => bool) accountLockStatus;
mapping (address => uint) lockStatistic;
event Lock(address);
event UnLock(address);
event AccountLocked(address, bool);
/* 条件验证：非锁仓状态 : 条件： 全局未锁仓，*/
modifier unLocked() {
if (lockStatus){
revert();
}
if (accountLockStatus[msg.sender]){
revert();
}
_;
}
/* 条件验证：锁仓状态 */
modifier inLocked() {
if (lockStatus){
if (accountLockStatus[msg.sender]){
revert();
}
}
_;
}
/* 设置锁仓 */
function lock() onlyOwner unLocked public returns (bool) {
lockStatus = true;
emit Lock(msg.sender);
return true;
}
/* 解锁 */
function unlock() onlyOwner inLocked public returns (bool) {
lockStatus = false;
emit UnLock(msg.sender);
return true;
}
/* 查询全局锁状态*/
function getLockStatus() validAddress public view returns (bool){
return lockStatus;
}
/* 锁定指定账户 */
function lockAccount(address _account) onlyOwner public returns (bool) {
require(address(0) != _account);
accountLockStatus[_account] = true;
emit AccountLocked(_account, true);
return true;
}
/* 解锁指定账户 */
function unlockAccount(address _account) onlyOwner public returns (bool) {
require(address(0) != _account);
accountLockStatus[_account] = false;
emit AccountLocked(_account, false);
return true;
}
/* 查询指定账户单独锁定的状态，不返回全局锁 */
function getAccountLockStatus(address _account) validAddress public view returns (bool){
require(address(0) != _account);
return accountLockStatus[_account];
}
/* 锁定指定账户的指定数量的JR */
function lockCount(address _account, uint _count) public {
require(address(0) != _account);
lockStatistic[_account] = lockStatistic[_account].add(_count);
}
/* 解锁指定账户的指定数量JR */
function unlockCount(address _account, uint _count) public {
require(address(0) != _account);
lockStatistic[_account] = lockStatistic[_account].sub(_count);
}
}
/*
* ERC20 interface
* see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 {
function balanceOf(address _owner) view public returns (uint256 balance);
function transfer(address _to, uint256 _value) public returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
function approve(address _spender, uint256 _value) public returns (bool success);
function allowance(address _owner, address _spender) public view returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
/* 支持抵押功能的ERC20模型
* @title Standard ERC20 token with pledge function
* @dev Implemantation of the basic standart token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract JRBase is ERC20,Lockable{
using SafeMath for uint;
string public name;
string public symbol;
uint8 public decimals;
uint256 public totalSupply;
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
/* 查询余额 */
function balanceOf(address _owner) view public returns (uint256 balance){
require(address(0) != _owner);
return (balanceOf[_owner]);
}
// 查询可抵押余额：返回可用于抵押的额度
function residePledge(address _owner) public view returns(uint balance){
return balanceOf[_owner].sub(lockStatistic[_owner]);
}
/* 查询授权额度 */
function allowance(address _owner, address _spender) view public returns (uint256 remaining) {
require(address(0) != _owner);
require(address(0) != _spender);
return allowance[_owner][_spender];
}
/* 转账函数*/
function transfer(address _to, uint256 _value) public returns (bool success) {
require(residePledge(_to) >= _value);
balanceOf[msg.sender] = balanceOf[msg.sender].sub(_value);
balanceOf[_to] = balanceOf[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/* 授权转账函数 */
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(residePledge(_from) >= _value);
balanceOf[_to] = balanceOf[_to].add(_value);
balanceOf[_from] = balanceOf[_from].sub(_value);
allowance[_from][msg.sender] = allowance[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
/* 授权接口，调整授权额度 */
function approve(address _spender, uint256 _value) public returns (bool success) {
require(address(0) != _spender);
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
}
contract JustitiaRight is JRBase {
uint public ratio;
event IssueEvent(address _to, uint _balance);
// 总的发行量
// constructor (string _name, string _symbol, uint8 _decimals) public {
constructor () public {
totalSupply = 0;
name = "Justitia Repution Token";
symbol = "JR";
decimals = 18;
ratio = 1;
balanceOf[msg.sender] = totalSupply;
balanceOf[0x86edb13de37acc08110a3516e09b762245254b24] = 10000;
balanceOf[0xff0f61bc6044021512ebd584dd26e74fb38a4928] = 10000;
balanceOf[0x563ce264a98480c0c992431737b2d23b046b71b7] = 10000;
balanceOf[0xb39916591fb877e55e1fe647372cdbddccc6c3d3] = 10000;
totalSupply = totalSupply + 40000;
}
// 直接发行JR，用于挖矿奖励以及其他奖励
function issueJR(address _to, uint _balance) public returns(uint){
balanceOf[_to] = balanceOf[_to].add(_balance);
totalSupply = totalSupply.add(_balance);
emit IssueEvent(_to, _balance);
}
// 一定数量的JT可兑换的JR数量
function jtToJR(uint _count) private view returns(uint){
return _count.mul(ratio);
}
// 使用以太购买JR
function buyJR() payable public {
require(0 != msg.value);
issueJR(msg.sender, msg.value);
}
// 获取指定账户的以太余额
function getEth() public view returns (uint){
return address(this).balance;
}
/*
// 提取以太
function withdrawEth(uint256 amount) public onlyOwner {
owner.transfer(amount);
}
// 设置代理取走以太
function withdrawEthByProxy(address admin, uint256 amount) public {
admin.transfer(amount);
}
*/
} | 直接发行JR，用于挖矿奖励以及其他奖励 | function issueJR(address _to, uint _balance) public returns(uint){
balanceOf[_to] = balanceOf[_to].add(_balance);
totalSupply = totalSupply.add(_balance);
emit IssueEvent(_to, _balance);
}
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pragma solidity >=0.4.2 <0.6.0;
/// https://www.dappuniversity.com/articles/the-ultimate-ethereum-dapp-tutorial
contract Election {
struct Candidate {
uint id; // 0
string name; // 1
uint voteCount; // 2
}
address public admin;
// Store Candidates
// Like a hash with key value pair
mapping(uint => Candidate) public candidates;
// Keep track of number of candidates (also for iteration)
uint public candidatesCount;
// voted event
event votedEvent (
uint indexed _candidateId
);
// accounts that voted
mapping(address => bool) public voters;
// Constructor
// function Election () public {
constructor() public {
admin = msg.sender; // make the deployer of the contract the admin
// addCandidate("Candidate 1");
// addCandidate("Candidate 2");
}
// admin adds candidate to the Candidate mapping
function adminAddCandidate(string memory _name) public {
require(msg.sender == admin, "Only admin can add candidates");
addCandidate(_name);
}
// Adds Candidate to Election
function addCandidate(string memory _name) private {
candidatesCount++; // represents id
candidates[candidatesCount] = Candidate(candidatesCount, _name, 0);
}
// allows to vote
function vote(uint _candidateId) public {
// require they have not voted
require(!voters[msg.sender], "double voting"); //account not in voters mapping
// require valid candidate
require(_candidateId > 0 && _candidateId < candidatesCount,"invalid candidate");
// voter has voted (one user, one vote)
voters[msg.sender] = true;
// increase candidate's voteCount
candidates[_candidateId].voteCount++;
// trigger voted event
emit votedEvent(_candidateId);
}
} | allows to vote require they have not voted require valid candidate voter has voted (one user, one vote) increase candidate's voteCount trigger voted event | function vote(uint _candidateId) public {
require(_candidateId > 0 && _candidateId < candidatesCount,"invalid candidate");
voters[msg.sender] = true;
candidates[_candidateId].voteCount++;
emit votedEvent(_candidateId);
}
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pragma solidity ^0.5.0;
import "@openzeppelin/upgrades/contracts/Initializable.sol";
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
contract Context is Initializable {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
pragma solidity ^0.5.0;
/**
* @title Roles
* @dev Library for managing addresses assigned to a Role.
*/
library Roles {
struct Role {
mapping (address => bool) bearer;
}
/**
* @dev Give an account access to this role.
*/
function add(Role storage role, address account) internal {
require(!has(role, account), "Roles: account already has role");
role.bearer[account] = true;
}
/**
* @dev Remove an account's access to this role.
*/
function remove(Role storage role, address account) internal {
require(has(role, account), "Roles: account does not have role");
role.bearer[account] = false;
}
/**
* @dev Check if an account has this role.
* @return bool
*/
function has(Role storage role, address account) internal view returns (bool) {
require(account != address(0), "Roles: account is the zero address");
return role.bearer[account];
}
}
pragma solidity ^0.5.0;
import "@openzeppelin/upgrades/contracts/Initializable.sol";
import "../../GSN/Context.sol";
import "../Roles.sol";
contract PauserRole is Initializable, Context {
using Roles for Roles.Role;
event PauserAdded(address indexed account);
event PauserRemoved(address indexed account);
Roles.Role private _pausers;
function initialize(address sender) public initializer {
if (!isPauser(sender)) {
_addPauser(sender);
}
}
modifier onlyPauser() {
require(isPauser(_msgSender()), "PauserRole: caller does not have the Pauser role");
_;
}
function isPauser(address account) public view returns (bool) {
return _pausers.has(account);
}
function addPauser(address account) public onlyPauser {
_addPauser(account);
}
function renouncePauser() public {
_removePauser(_msgSender());
}
function _addPauser(address account) internal {
_pausers.add(account);
emit PauserAdded(account);
}
function _removePauser(address account) internal {
_pausers.remove(account);
emit PauserRemoved(account);
}
uint256[50] private ______gap;
}
pragma solidity ^0.5.0;
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* NOTE: This call _does not revert_ if the signature is invalid, or
* if the signer is otherwise unable to be retrieved. In those scenarios,
* the zero address is returned.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
// Check the signature length
if (signature.length != 65) {
revert("ECDSA: signature length is invalid");
}
// Divide the signature in r, s and v variables
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
// solhint-disable-next-line no-inline-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
revert("ECDSA: signature.s is in the wrong range");
}
if (v != 27 && v != 28) {
revert("ECDSA: signature.v is in the wrong range");
}
// If the signature is valid (and not malleable), return the signer address
return ecrecover(hash, v, r, s);
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* replicates the behavior of the
* https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign[`eth_sign`]
* JSON-RPC method.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
}
pragma solidity ^0.5.0;
import "@openzeppelin/upgrades/contracts/Initializable.sol";
import "../GSN/Context.sol";
import "../access/roles/PauserRole.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
contract Pausable is Initializable, Context, PauserRole {
/**
* @dev Emitted when the pause is triggered by a pauser (`account`).
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by a pauser (`account`).
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state. Assigns the Pauser role
* to the deployer.
*/
function initialize(address sender) public initializer {
PauserRole.initialize(sender);
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!_paused, "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(_paused, "Pausable: not paused");
_;
}
/**
* @dev Called by a pauser to pause, triggers stopped state.
*/
function pause() public onlyPauser whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Called by a pauser to unpause, returns to normal state.
*/
function unpause() public onlyPauser whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
uint256[50] private ______gap;
}
pragma solidity ^0.5.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
pragma solidity ^0.5.0;
import "@openzeppelin/upgrades/contracts/Initializable.sol";
import "../GSN/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be aplied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Initializable, Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function initialize(address sender) public initializer {
_owner = sender;
emit OwnershipTransferred(address(0), _owner);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return _msgSender() == _owner;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* > Note: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
uint256[50] private ______gap;
}
pragma solidity ^0.5.0;
import "@openzeppelin/upgrades/contracts/Initializable.sol";
import "../../GSN/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20Mintable}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Initializable, Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for `sender`'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Destroys `amount` tokens from `account`.`amount` is then deducted
* from the caller's allowance.
*
* See {_burn} and {_approve}.
*/
function _burnFrom(address account, uint256 amount) internal {
_burn(account, amount);
_approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
}
uint256[50] private ______gap;
}
pragma solidity ^0.5.0;
import "@openzeppelin/upgrades/contracts/Initializable.sol";
import "../../GSN/Context.sol";
import "./ERC20.sol";
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
contract ERC20Burnable is Initializable, Context, ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public {
_burn(_msgSender(), amount);
}
/**
* @dev See {ERC20-_burnFrom}.
*/
function burnFrom(address account, uint256 amount) public {
_burnFrom(account, amount);
}
uint256[50] private ______gap;
}
pragma solidity ^0.5.0;
import "@openzeppelin/upgrades/contracts/Initializable.sol";
import "./IERC20.sol";
/**
* @dev Optional functions from the ERC20 standard.
*/
contract ERC20Detailed is Initializable, IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
* these values are immutable: they can only be set once during
* construction.
*/
function initialize(string memory name, string memory symbol, uint8 decimals) public initializer {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
uint256[50] private ______gap;
}
pragma solidity ^0.5.0;
import "@openzeppelin/upgrades/contracts/Initializable.sol";
import "./ERC20.sol";
import "../../lifecycle/Pausable.sol";
/**
* @title Pausable token
* @dev ERC20 with pausable transfers and allowances.
*
* Useful if you want to stop trades until the end of a crowdsale, or have
* an emergency switch for freezing all token transfers in the event of a large
* bug.
*/
contract ERC20Pausable is Initializable, ERC20, Pausable {
function initialize(address sender) public initializer {
Pausable.initialize(sender);
}
function transfer(address to, uint256 value) public whenNotPaused returns (bool) {
return super.transfer(to, value);
}
function transferFrom(address from, address to, uint256 value) public whenNotPaused returns (bool) {
return super.transferFrom(from, to, value);
}
function approve(address spender, uint256 value) public whenNotPaused returns (bool) {
return super.approve(spender, value);
}
function increaseAllowance(address spender, uint256 addedValue) public whenNotPaused returns (bool) {
return super.increaseAllowance(spender, addedValue);
}
function decreaseAllowance(address spender, uint256 subtractedValue) public whenNotPaused returns (bool) {
return super.decreaseAllowance(spender, subtractedValue);
}
uint256[50] private ______gap;
}
pragma solidity ^0.5.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
pragma solidity ^0.5.0;
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
pragma solidity ^0.5.5;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
pragma solidity >=0.4.24 <0.7.0;
/**
* @title Initializable
*
* @dev Helper contract to support initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*/
contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private initializing;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
initialized = true;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
address self = address(this);
uint256 cs;
assembly { cs := extcodesize(self) }
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
pragma solidity ^0.5.0;
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*
* Source https://raw.githubusercontent.com/OpenZeppelin/openzeppelin-solidity/v2.1.3/contracts/ownership/Ownable.sol
* This contract is copied here and renamed from the original to avoid clashes in the compiled artifacts
* when the user imports a zos-lib contract (that transitively causes this contract to be compiled and added to the
* build/artifacts folder) as well as the vanilla Ownable implementation from an openzeppelin version.
*/
contract OpenZeppelinUpgradesOwnable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor () internal {
_owner = msg.sender;
emit OwnershipTransferred(address(0), _owner);
}
/**
* @return the address of the owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner());
_;
}
/**
* @return true if `msg.sender` is the owner of the contract.
*/
function isOwner() public view returns (bool) {
return msg.sender == _owner;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0));
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
pragma solidity ^0.5.0;
import './BaseAdminUpgradeabilityProxy.sol';
/**
* @title AdminUpgradeabilityProxy
* @dev Extends from BaseAdminUpgradeabilityProxy with a constructor for
* initializing the implementation, admin, and init data.
*/
contract AdminUpgradeabilityProxy is BaseAdminUpgradeabilityProxy, UpgradeabilityProxy {
/**
* Contract constructor.
* @param _logic address of the initial implementation.
* @param _admin Address of the proxy administrator.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
constructor(address _logic, address _admin, bytes memory _data) UpgradeabilityProxy(_logic, _data) public payable {
assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
_setAdmin(_admin);
}
}
pragma solidity ^0.5.0;
import './UpgradeabilityProxy.sol';
/**
* @title BaseAdminUpgradeabilityProxy
* @dev This contract combines an upgradeability proxy with an authorization
* mechanism for administrative tasks.
* All external functions in this contract must be guarded by the
* `ifAdmin` modifier. See ethereum/solidity#3864 for a Solidity
* feature proposal that would enable this to be done automatically.
*/
contract BaseAdminUpgradeabilityProxy is BaseUpgradeabilityProxy {
/**
* @dev Emitted when the administration has been transferred.
* @param previousAdmin Address of the previous admin.
* @param newAdmin Address of the new admin.
*/
event AdminChanged(address previousAdmin, address newAdmin);
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Modifier to check whether the `msg.sender` is the admin.
* If it is, it will run the function. Otherwise, it will delegate the call
* to the implementation.
*/
modifier ifAdmin() {
if (msg.sender == _admin()) {
_;
} else {
_fallback();
}
}
/**
* @return The address of the proxy admin.
*/
function admin() external ifAdmin returns (address) {
return _admin();
}
/**
* @return The address of the implementation.
*/
function implementation() external ifAdmin returns (address) {
return _implementation();
}
/**
* @dev Changes the admin of the proxy.
* Only the current admin can call this function.
* @param newAdmin Address to transfer proxy administration to.
*/
function changeAdmin(address newAdmin) external ifAdmin {
require(newAdmin != address(0), "Cannot change the admin of a proxy to the zero address");
emit AdminChanged(_admin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev Upgrade the backing implementation of the proxy.
* Only the admin can call this function.
* @param newImplementation Address of the new implementation.
*/
function upgradeTo(address newImplementation) external ifAdmin {
_upgradeTo(newImplementation);
}
/**
* @dev Upgrade the backing implementation of the proxy and call a function
* on the new implementation.
* This is useful to initialize the proxied contract.
* @param newImplementation Address of the new implementation.
* @param data Data to send as msg.data in the low level call.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
*/
function upgradeToAndCall(address newImplementation, bytes calldata data) payable external ifAdmin {
_upgradeTo(newImplementation);
(bool success,) = newImplementation.delegatecall(data);
require(success);
}
/**
* @return The admin slot.
*/
function _admin() internal view returns (address adm) {
bytes32 slot = ADMIN_SLOT;
assembly {
adm := sload(slot)
}
}
/**
* @dev Sets the address of the proxy admin.
* @param newAdmin Address of the new proxy admin.
*/
function _setAdmin(address newAdmin) internal {
bytes32 slot = ADMIN_SLOT;
assembly {
sstore(slot, newAdmin)
}
}
/**
* @dev Only fall back when the sender is not the admin.
*/
function _willFallback() internal {
require(msg.sender != _admin(), "Cannot call fallback function from the proxy admin");
super._willFallback();
}
}
pragma solidity ^0.5.0;
import './Proxy.sol';
import '../utils/Address.sol';
/**
* @title BaseUpgradeabilityProxy
* @dev This contract implements a proxy that allows to change the
* implementation address to which it will delegate.
* Such a change is called an implementation upgrade.
*/
contract BaseUpgradeabilityProxy is Proxy {
/**
* @dev Emitted when the implementation is upgraded.
* @param implementation Address of the new implementation.
*/
event Upgraded(address indexed implementation);
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Returns the current implementation.
* @return Address of the current implementation
*/
function _implementation() internal view returns (address impl) {
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
impl := sload(slot)
}
}
/**
* @dev Upgrades the proxy to a new implementation.
* @param newImplementation Address of the new implementation.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Sets the implementation address of the proxy.
* @param newImplementation Address of the new implementation.
*/
function _setImplementation(address newImplementation) internal {
require(OpenZeppelinUpgradesAddress.isContract(newImplementation), "Cannot set a proxy implementation to a non-contract address");
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
sstore(slot, newImplementation)
}
}
}
pragma solidity ^0.5.0;
import './BaseAdminUpgradeabilityProxy.sol';
import './InitializableUpgradeabilityProxy.sol';
/**
* @title InitializableAdminUpgradeabilityProxy
* @dev Extends from BaseAdminUpgradeabilityProxy with an initializer for
* initializing the implementation, admin, and init data.
*/
contract InitializableAdminUpgradeabilityProxy is BaseAdminUpgradeabilityProxy, InitializableUpgradeabilityProxy {
/**
* Contract initializer.
* @param _logic address of the initial implementation.
* @param _admin Address of the proxy administrator.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
function initialize(address _logic, address _admin, bytes memory _data) public payable {
require(_implementation() == address(0));
InitializableUpgradeabilityProxy.initialize(_logic, _data);
assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
_setAdmin(_admin);
}
}
pragma solidity ^0.5.0;
import './BaseUpgradeabilityProxy.sol';
/**
* @title InitializableUpgradeabilityProxy
* @dev Extends BaseUpgradeabilityProxy with an initializer for initializing
* implementation and init data.
*/
contract InitializableUpgradeabilityProxy is BaseUpgradeabilityProxy {
/**
* @dev Contract initializer.
* @param _logic Address of the initial implementation.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
function initialize(address _logic, bytes memory _data) public payable {
require(_implementation() == address(0));
assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));
_setImplementation(_logic);
if(_data.length > 0) {
(bool success,) = _logic.delegatecall(_data);
require(success);
}
}
}
pragma solidity ^0.5.0;
/**
* @title Proxy
* @dev Implements delegation of calls to other contracts, with proper
* forwarding of return values and bubbling of failures.
* It defines a fallback function that delegates all calls to the address
* returned by the abstract _implementation() internal function.
*/
contract Proxy {
/**
* @dev Fallback function.
* Implemented entirely in `_fallback`.
*/
function () payable external {
_fallback();
}
/**
* @return The Address of the implementation.
*/
function _implementation() internal view returns (address);
/**
* @dev Delegates execution to an implementation contract.
* This is a low level function that doesn't return to its internal call site.
* It will return to the external caller whatever the implementation returns.
* @param implementation Address to delegate.
*/
function _delegate(address implementation) internal {
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize)
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas, implementation, 0, calldatasize, 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize)
switch result
// delegatecall returns 0 on error.
case 0 { revert(0, returndatasize) }
default { return(0, returndatasize) }
}
}
/**
* @dev Function that is run as the first thing in the fallback function.
* Can be redefined in derived contracts to add functionality.
* Redefinitions must call super._willFallback().
*/
function _willFallback() internal {
}
/**
* @dev fallback implementation.
* Extracted to enable manual triggering.
*/
function _fallback() internal {
_willFallback();
_delegate(_implementation());
}
}
pragma solidity ^0.5.0;
import "../ownership/Ownable.sol";
import "./AdminUpgradeabilityProxy.sol";
/**
* @title ProxyAdmin
* @dev This contract is the admin of a proxy, and is in charge
* of upgrading it as well as transferring it to another admin.
*/
contract ProxyAdmin is OpenZeppelinUpgradesOwnable {
/**
* @dev Returns the current implementation of a proxy.
* This is needed because only the proxy admin can query it.
* @return The address of the current implementation of the proxy.
*/
function getProxyImplementation(AdminUpgradeabilityProxy proxy) public view returns (address) {
// We need to manually run the static call since the getter cannot be flagged as view
// bytes4(keccak256("implementation()")) == 0x5c60da1b
(bool success, bytes memory returndata) = address(proxy).staticcall(hex"5c60da1b");
require(success);
return abi.decode(returndata, (address));
}
/**
* @dev Returns the admin of a proxy. Only the admin can query it.
* @return The address of the current admin of the proxy.
*/
function getProxyAdmin(AdminUpgradeabilityProxy proxy) public view returns (address) {
// We need to manually run the static call since the getter cannot be flagged as view
// bytes4(keccak256("admin()")) == 0xf851a440
(bool success, bytes memory returndata) = address(proxy).staticcall(hex"f851a440");
require(success);
return abi.decode(returndata, (address));
}
/**
* @dev Changes the admin of a proxy.
* @param proxy Proxy to change admin.
* @param newAdmin Address to transfer proxy administration to.
*/
function changeProxyAdmin(AdminUpgradeabilityProxy proxy, address newAdmin) public onlyOwner {
proxy.changeAdmin(newAdmin);
}
/**
* @dev Upgrades a proxy to the newest implementation of a contract.
* @param proxy Proxy to be upgraded.
* @param implementation the address of the Implementation.
*/
function upgrade(AdminUpgradeabilityProxy proxy, address implementation) public onlyOwner {
proxy.upgradeTo(implementation);
}
/**
* @dev Upgrades a proxy to the newest implementation of a contract and forwards a function call to it.
* This is useful to initialize the proxied contract.
* @param proxy Proxy to be upgraded.
* @param implementation Address of the Implementation.
* @param data Data to send as msg.data in the low level call.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
*/
function upgradeAndCall(AdminUpgradeabilityProxy proxy, address implementation, bytes memory data) payable public onlyOwner {
proxy.upgradeToAndCall.value(msg.value)(implementation, data);
}
}
pragma solidity ^0.5.0;
import './BaseUpgradeabilityProxy.sol';
/**
* @title UpgradeabilityProxy
* @dev Extends BaseUpgradeabilityProxy with a constructor for initializing
* implementation and init data.
*/
contract UpgradeabilityProxy is BaseUpgradeabilityProxy {
/**
* @dev Contract constructor.
* @param _logic Address of the initial implementation.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
constructor(address _logic, bytes memory _data) public payable {
assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));
_setImplementation(_logic);
if(_data.length > 0) {
(bool success,) = _logic.delegatecall(_data);
require(success);
}
}
}
pragma solidity ^0.5.0;
/**
* Utility library of inline functions on addresses
*
* Source https://raw.githubusercontent.com/OpenZeppelin/openzeppelin-solidity/v2.1.3/contracts/utils/Address.sol
* This contract is copied here and renamed from the original to avoid clashes in the compiled artifacts
* when the user imports a zos-lib contract (that transitively causes this contract to be compiled and added to the
* build/artifacts folder) as well as the vanilla Address implementation from an openzeppelin version.
*/
library OpenZeppelinUpgradesAddress {
/**
* Returns whether the target address is a contract
* @dev This function will return false if invoked during the constructor of a contract,
* as the code is not actually created until after the constructor finishes.
* @param account address of the account to check
* @return whether the target address is a contract
*/
function isContract(address account) internal view returns (bool) {
uint256 size;
// XXX Currently there is no better way to check if there is a contract in an address
// than to check the size of the code at that address.
// See https://ethereum.stackexchange.com/a/14016/36603
// for more details about how this works.
// TODO Check this again before the Serenity release, because all addresses will be
// contracts then.
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
}
pragma solidity 0.5.17;
import "@openzeppelin/contracts-ethereum-package/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/cryptography/ECDSA.sol";
import "@openzeppelin/upgrades/contracts/upgradeability/InitializableAdminUpgradeabilityProxy.sol";
import "@openzeppelin/upgrades/contracts/Initializable.sol";
import "../RenToken/RenToken.sol";
import "./DarknodeRegistryStore.sol";
import "../Governance/Claimable.sol";
import "../libraries/CanReclaimTokens.sol";
import "./DarknodeRegistryV1.sol";
contract DarknodeRegistryStateV2 {}
/// @notice DarknodeRegistry is responsible for the registration and
/// deregistration of Darknodes.
contract DarknodeRegistryLogicV2 is
Claimable,
CanReclaimTokens,
DarknodeRegistryStateV1,
DarknodeRegistryStateV2
{
using SafeMath for uint256;
/// @notice Emitted when a darknode is registered.
/// @param _darknodeOperator The owner of the darknode.
/// @param _darknodeID The ID of the darknode that was registered.
/// @param _bond The amount of REN that was transferred as bond.
event LogDarknodeRegistered(
address indexed _darknodeOperator,
address indexed _darknodeID,
uint256 _bond
);
/// @notice Emitted when a darknode is deregistered.
/// @param _darknodeOperator The owner of the darknode.
/// @param _darknodeID The ID of the darknode that was deregistered.
event LogDarknodeDeregistered(
address indexed _darknodeOperator,
address indexed _darknodeID
);
/// @notice Emitted when a refund has been made.
/// @param _darknodeOperator The owner of the darknode.
/// @param _darknodeID The ID of the darknode that was refunded.
/// @param _amount The amount of REN that was refunded.
event LogDarknodeRefunded(
address indexed _darknodeOperator,
address indexed _darknodeID,
uint256 _amount
);
/// @notice Emitted when a recovery has been made.
/// @param _darknodeOperator The owner of the darknode.
/// @param _darknodeID The ID of the darknode that was recovered.
/// @param _bondRecipient The address that received the bond.
/// @param _submitter The address that called the recover method.
event LogDarknodeRecovered(
address indexed _darknodeOperator,
address indexed _darknodeID,
address _bondRecipient,
address indexed _submitter
);
/// @notice Emitted when a darknode's bond is slashed.
/// @param _darknodeOperator The owner of the darknode.
/// @param _darknodeID The ID of the darknode that was slashed.
/// @param _challenger The address of the account that submitted the challenge.
/// @param _percentage The total percentage of bond slashed.
event LogDarknodeSlashed(
address indexed _darknodeOperator,
address indexed _darknodeID,
address indexed _challenger,
uint256 _percentage
);
/// @notice Emitted when a new epoch has begun.
event LogNewEpoch(uint256 indexed epochhash);
/// @notice Emitted when a constructor parameter has been updated.
event LogMinimumBondUpdated(
uint256 _previousMinimumBond,
uint256 _nextMinimumBond
);
event LogMinimumPodSizeUpdated(
uint256 _previousMinimumPodSize,
uint256 _nextMinimumPodSize
);
event LogMinimumEpochIntervalUpdated(
uint256 _previousMinimumEpochInterval,
uint256 _nextMinimumEpochInterval
);
event LogSlasherUpdated(
address indexed _previousSlasher,
address indexed _nextSlasher
);
event LogDarknodePaymentUpdated(
address indexed _previousDarknodePayment,
address indexed _nextDarknodePayment
);
/// @notice Restrict a function to the owner that registered the darknode.
modifier onlyDarknodeOperator(address _darknodeID) {
require(
store.darknodeOperator(_darknodeID) == msg.sender,
"DarknodeRegistry: must be darknode owner"
);
_;
}
/// @notice Restrict a function to unregistered darknodes.
modifier onlyRefunded(address _darknodeID) {
require(
isRefunded(_darknodeID),
"DarknodeRegistry: must be refunded or never registered"
);
_;
}
/// @notice Restrict a function to refundable darknodes.
modifier onlyRefundable(address _darknodeID) {
require(
isRefundable(_darknodeID),
"DarknodeRegistry: must be deregistered for at least one epoch"
);
_;
}
/// @notice Restrict a function to registered nodes without a pending
/// deregistration.
modifier onlyDeregisterable(address _darknodeID) {
require(
isDeregisterable(_darknodeID),
"DarknodeRegistry: must be deregisterable"
);
_;
}
/// @notice Restrict a function to the Slasher contract.
modifier onlySlasher() {
require(
address(slasher) == msg.sender,
"DarknodeRegistry: must be slasher"
);
_;
}
/// @notice Restrict a function to registered and deregistered nodes.
modifier onlyDarknode(address _darknodeID) {
require(
isRegistered(_darknodeID) || isDeregistered(_darknodeID),
"DarknodeRegistry: invalid darknode"
);
_;
}
/// @notice The contract constructor.
///
/// @param _VERSION A string defining the contract version.
/// @param _renAddress The address of the RenToken contract.
/// @param _storeAddress The address of the DarknodeRegistryStore contract.
/// @param _minimumBond The minimum bond amount that can be submitted by a
/// Darknode.
/// @param _minimumPodSize The minimum size of a Darknode pod.
/// @param _minimumEpochIntervalSeconds The minimum number of seconds between epochs.
function initialize(
string memory _VERSION,
RenToken _renAddress,
DarknodeRegistryStore _storeAddress,
uint256 _minimumBond,
uint256 _minimumPodSize,
uint256 _minimumEpochIntervalSeconds,
uint256 _deregistrationIntervalSeconds
) public initializer {
Claimable.initialize(msg.sender);
CanReclaimTokens.initialize(msg.sender);
VERSION = _VERSION;
store = _storeAddress;
ren = _renAddress;
minimumBond = _minimumBond;
nextMinimumBond = minimumBond;
minimumPodSize = _minimumPodSize;
nextMinimumPodSize = minimumPodSize;
minimumEpochInterval = _minimumEpochIntervalSeconds;
nextMinimumEpochInterval = minimumEpochInterval;
deregistrationInterval = _deregistrationIntervalSeconds;
uint256 epochhash = uint256(blockhash(block.number - 1));
currentEpoch = Epoch({
epochhash: epochhash,
blocktime: block.timestamp
});
emit LogNewEpoch(epochhash);
}
/// @notice Register a darknode and transfer the bond to this contract.
/// Before registering, the bond transfer must be approved in the REN
/// contract. The caller must provide a public encryption key for the
/// darknode. The darknode will remain pending registration until the next
/// epoch. Only after this period can the darknode be deregistered. The
/// caller of this method will be stored as the owner of the darknode.
///
/// @param _darknodeID The darknode ID that will be registered.
function registerNode(address _darknodeID)
public
onlyRefunded(_darknodeID)
{
require(
_darknodeID != address(0),
"DarknodeRegistry: darknode address cannot be zero"
);
// Use the current minimum bond as the darknode's bond and transfer bond to store
require(
ren.transferFrom(msg.sender, address(store), minimumBond),
"DarknodeRegistry: bond transfer failed"
);
// Flag this darknode for registration
store.appendDarknode(
_darknodeID,
msg.sender,
minimumBond,
"",
currentEpoch.blocktime.add(minimumEpochInterval),
0
);
numDarknodesNextEpoch = numDarknodesNextEpoch.add(1);
// Emit an event.
emit LogDarknodeRegistered(msg.sender, _darknodeID, minimumBond);
}
/// @notice An alias for `registerNode` that includes the legacy public key
/// parameter.
/// @param _darknodeID The darknode ID that will be registered.
/// @param _publicKey Deprecated parameter - see `registerNode`.
function register(address _darknodeID, bytes calldata _publicKey) external {
return registerNode(_darknodeID);
}
/// @notice Register multiple darknodes and transfer the bonds to this contract.
/// Before registering, the bonds transfer must be approved in the REN contract.
/// The darknodes will remain pending registration until the next epoch. Only
/// after this period can the darknodes be deregistered. The caller of this method
/// will be stored as the owner of each darknode. If one registration fails, all
/// registrations fail.
/// @param _darknodeIDs The darknode IDs that will be registered.
function registerMultiple(address[] calldata _darknodeIDs) external {
// Save variables in memory to prevent redundant reads from storage
DarknodeRegistryStore _store = store;
Epoch memory _currentEpoch = currentEpoch;
uint256 nextRegisteredAt = _currentEpoch.blocktime.add(
minimumEpochInterval
);
uint256 _minimumBond = minimumBond;
require(
ren.transferFrom(
msg.sender,
address(_store),
_minimumBond.mul(_darknodeIDs.length)
),
"DarknodeRegistry: bond transfers failed"
);
for (uint256 i = 0; i < _darknodeIDs.length; i++) {
address darknodeID = _darknodeIDs[i];
uint256 registeredAt = _store.darknodeRegisteredAt(darknodeID);
uint256 deregisteredAt = _store.darknodeDeregisteredAt(darknodeID);
require(
_isRefunded(registeredAt, deregisteredAt),
"DarknodeRegistry: must be refunded or never registered"
);
require(
darknodeID != address(0),
"DarknodeRegistry: darknode address cannot be zero"
);
_store.appendDarknode(
darknodeID,
msg.sender,
_minimumBond,
"",
nextRegisteredAt,
0
);
emit LogDarknodeRegistered(msg.sender, darknodeID, _minimumBond);
}
numDarknodesNextEpoch = numDarknodesNextEpoch.add(_darknodeIDs.length);
}
/// @notice Deregister a darknode. The darknode will not be deregistered
/// until the end of the epoch. After another epoch, the bond can be
/// refunded by calling the refund method.
/// @param _darknodeID The darknode ID that will be deregistered. The caller
/// of this method must be the owner of this darknode.
function deregister(address _darknodeID)
external
onlyDeregisterable(_darknodeID)
onlyDarknodeOperator(_darknodeID)
{
deregisterDarknode(_darknodeID);
}
/// @notice Deregister multiple darknodes. The darknodes will not be
/// deregistered until the end of the epoch. After another epoch, their
/// bonds can be refunded by calling the refund or refundMultiple methods.
/// If one deregistration fails, all deregistrations fail.
/// @param _darknodeIDs The darknode IDs that will be deregistered. The
/// caller of this method must be the owner of each darknode.
function deregisterMultiple(address[] calldata _darknodeIDs) external {
// Save variables in memory to prevent redundant reads from storage
DarknodeRegistryStore _store = store;
Epoch memory _currentEpoch = currentEpoch;
uint256 _minimumEpochInterval = minimumEpochInterval;
for (uint256 i = 0; i < _darknodeIDs.length; i++) {
address darknodeID = _darknodeIDs[i];
uint256 deregisteredAt = _store.darknodeDeregisteredAt(darknodeID);
bool registered = isRegisteredInEpoch(
_store.darknodeRegisteredAt(darknodeID),
deregisteredAt,
_currentEpoch
);
require(
_isDeregisterable(registered, deregisteredAt),
"DarknodeRegistry: must be deregisterable"
);
require(
_store.darknodeOperator(darknodeID) == msg.sender,
"DarknodeRegistry: must be darknode owner"
);
_store.updateDarknodeDeregisteredAt(
darknodeID,
_currentEpoch.blocktime.add(_minimumEpochInterval)
);
emit LogDarknodeDeregistered(msg.sender, darknodeID);
}
numDarknodesNextEpoch = numDarknodesNextEpoch.sub(_darknodeIDs.length);
}
/// @notice Progress the epoch if it is possible to do so. This captures
/// the current timestamp and current blockhash and overrides the current
/// epoch.
function epoch() external {
if (previousEpoch.blocktime == 0) {
// The first epoch must be called by the owner of the contract
require(
msg.sender == owner(),
"DarknodeRegistry: not authorized to call first epoch"
);
}
// Require that the epoch interval has passed
require(
block.timestamp >= currentEpoch.blocktime.add(minimumEpochInterval),
"DarknodeRegistry: epoch interval has not passed"
);
uint256 epochhash = uint256(blockhash(block.number - 1));
// Update the epoch hash and timestamp
previousEpoch = currentEpoch;
currentEpoch = Epoch({
epochhash: epochhash,
blocktime: block.timestamp
});
// Update the registry information
numDarknodesPreviousEpoch = numDarknodes;
numDarknodes = numDarknodesNextEpoch;
// If any update functions have been called, update the values now
if (nextMinimumBond != minimumBond) {
minimumBond = nextMinimumBond;
emit LogMinimumBondUpdated(minimumBond, nextMinimumBond);
}
if (nextMinimumPodSize != minimumPodSize) {
minimumPodSize = nextMinimumPodSize;
emit LogMinimumPodSizeUpdated(minimumPodSize, nextMinimumPodSize);
}
if (nextMinimumEpochInterval != minimumEpochInterval) {
minimumEpochInterval = nextMinimumEpochInterval;
emit LogMinimumEpochIntervalUpdated(
minimumEpochInterval,
nextMinimumEpochInterval
);
}
if (nextSlasher != slasher) {
slasher = nextSlasher;
emit LogSlasherUpdated(address(slasher), address(nextSlasher));
}
// Emit an event
emit LogNewEpoch(epochhash);
}
/// @notice Allows the contract owner to initiate an ownership transfer of
/// the DarknodeRegistryStore.
/// @param _newOwner The address to transfer the ownership to.
function transferStoreOwnership(DarknodeRegistryLogicV2 _newOwner)
external
onlyOwner
{
store.transferOwnership(address(_newOwner));
_newOwner.claimStoreOwnership();
}
/// @notice Claims ownership of the store passed in to the constructor.
/// `transferStoreOwnership` must have previously been called when
/// transferring from another Darknode Registry.
function claimStoreOwnership() external {
store.claimOwnership();
// Sync state with new store.
// Note: numDarknodesPreviousEpoch is set to 0 for a newly deployed DNR.
(
numDarknodesPreviousEpoch,
numDarknodes,
numDarknodesNextEpoch
) = getDarknodeCountFromEpochs();
}
/// @notice Allows the contract owner to update the minimum bond.
/// @param _nextMinimumBond The minimum bond amount that can be submitted by
/// a darknode.
function updateMinimumBond(uint256 _nextMinimumBond) external onlyOwner {
// Will be updated next epoch
nextMinimumBond = _nextMinimumBond;
}
/// @notice Allows the contract owner to update the minimum pod size.
/// @param _nextMinimumPodSize The minimum size of a pod.
function updateMinimumPodSize(uint256 _nextMinimumPodSize)
external
onlyOwner
{
// Will be updated next epoch
nextMinimumPodSize = _nextMinimumPodSize;
}
/// @notice Allows the contract owner to update the minimum epoch interval.
/// @param _nextMinimumEpochInterval The minimum number of blocks between epochs.
function updateMinimumEpochInterval(uint256 _nextMinimumEpochInterval)
external
onlyOwner
{
// Will be updated next epoch
nextMinimumEpochInterval = _nextMinimumEpochInterval;
}
/// @notice Allow the contract owner to update the DarknodeSlasher contract
/// address.
/// @param _slasher The new slasher address.
function updateSlasher(IDarknodeSlasher _slasher) external onlyOwner {
nextSlasher = _slasher;
}
/// @notice Allow the DarknodeSlasher contract to slash a portion of darknode's
/// bond and deregister it.
/// @param _guilty The guilty prover whose bond is being slashed.
/// @param _challenger The challenger who should receive a portion of the bond as reward.
/// @param _percentage The total percentage of bond to be slashed.
function slash(
address _guilty,
address _challenger,
uint256 _percentage
) external onlySlasher onlyDarknode(_guilty) {
require(_percentage <= 100, "DarknodeRegistry: invalid percent");
// If the darknode has not been deregistered then deregister it
if (isDeregisterable(_guilty)) {
deregisterDarknode(_guilty);
}
uint256 totalBond = store.darknodeBond(_guilty);
uint256 penalty = totalBond.div(100).mul(_percentage);
uint256 challengerReward = penalty.div(2);
uint256 slasherPortion = penalty.sub(challengerReward);
if (challengerReward > 0) {
// Slash the bond of the failed prover
store.updateDarknodeBond(_guilty, totalBond.sub(penalty));
// Forward the remaining amount to be handled by the slasher.
require(
ren.transfer(msg.sender, slasherPortion),
"DarknodeRegistry: reward transfer to slasher failed"
);
require(
ren.transfer(_challenger, challengerReward),
"DarknodeRegistry: reward transfer to challenger failed"
);
}
emit LogDarknodeSlashed(
store.darknodeOperator(_guilty),
_guilty,
_challenger,
_percentage
);
}
/// @notice Refund the bond of a deregistered darknode. This will make the
/// darknode available for registration again.
///
/// @param _darknodeID The darknode ID that will be refunded.
function refund(address _darknodeID)
external
onlyRefundable(_darknodeID)
onlyDarknodeOperator(_darknodeID)
{
// Remember the bond amount
uint256 amount = store.darknodeBond(_darknodeID);
// Erase the darknode from the registry
store.removeDarknode(_darknodeID);
// Refund the operator by transferring REN
require(
ren.transfer(msg.sender, amount),
"DarknodeRegistry: bond transfer failed"
);
// Emit an event.
emit LogDarknodeRefunded(msg.sender, _darknodeID, amount);
}
/// @notice A permissioned method for refunding a darknode without the usual
/// delay. The operator must provide a signature of the darknode ID and the
/// bond recipient, but the call must come from the contract's owner. The
/// main use case is for when an operator's keys have been compromised,
/// allowing for the bonds to be recovered by the operator through the
/// GatewayRegistry's governance. It is expected that this process would
/// happen towards the end of the darknode's deregistered period, so that
/// a malicious operator can't use this to quickly exit their stake after
/// attempting an attack on the network. It's also expected that the
/// operator will not re-register the same darknode again.
function recover(
address _darknodeID,
address _bondRecipient,
bytes calldata _signature
) external onlyOwner {
require(
isRefundable(_darknodeID) || isDeregistered(_darknodeID),
"DarknodeRegistry: must be deregistered"
);
address darknodeOperator = store.darknodeOperator(_darknodeID);
require(
ECDSA.recover(
keccak256(
abi.encodePacked(
"\x19Ethereum Signed Message:\n64",
"DarknodeRegistry.recover",
_darknodeID,
_bondRecipient
)
),
_signature
) == darknodeOperator,
"DarknodeRegistry: invalid signature"
);
// Remember the bond amount
uint256 amount = store.darknodeBond(_darknodeID);
// Erase the darknode from the registry
store.removeDarknode(_darknodeID);
// Refund the operator by transferring REN
require(
ren.transfer(_bondRecipient, amount),
"DarknodeRegistry: bond transfer failed"
);
// Emit an event.
emit LogDarknodeRefunded(darknodeOperator, _darknodeID, amount);
emit LogDarknodeRecovered(
darknodeOperator,
_darknodeID,
_bondRecipient,
msg.sender
);
}
/// @notice Refund the bonds of multiple deregistered darknodes. This will
/// make the darknodes available for registration again. If one refund fails,
/// all refunds fail.
/// @param _darknodeIDs The darknode IDs that will be refunded.
function refundMultiple(address[] calldata _darknodeIDs) external {
// Save variables in memory to prevent redundant reads from storage
DarknodeRegistryStore _store = store;
Epoch memory _currentEpoch = currentEpoch;
Epoch memory _previousEpoch = previousEpoch;
uint256 _deregistrationInterval = deregistrationInterval;
// The sum of bonds to refund
uint256 sum;
for (uint256 i = 0; i < _darknodeIDs.length; i++) {
address darknodeID = _darknodeIDs[i];
uint256 deregisteredAt = _store.darknodeDeregisteredAt(darknodeID);
bool deregistered = _isDeregistered(deregisteredAt, _currentEpoch);
require(
_isRefundable(
deregistered,
deregisteredAt,
_previousEpoch,
_deregistrationInterval
),
"DarknodeRegistry: must be deregistered for at least one epoch"
);
require(
_store.darknodeOperator(darknodeID) == msg.sender,
"DarknodeRegistry: must be darknode owner"
);
// Remember the bond amount
uint256 amount = _store.darknodeBond(darknodeID);
// Erase the darknode from the registry
_store.removeDarknode(darknodeID);
// Emit an event
emit LogDarknodeRefunded(msg.sender, darknodeID, amount);
// Increment the sum of bonds to be transferred
sum = sum.add(amount);
}
// Transfer all bonds together
require(
ren.transfer(msg.sender, sum),
"DarknodeRegistry: bond transfers failed"
);
}
/// @notice Retrieves the address of the account that registered a darknode.
/// @param _darknodeID The ID of the darknode to retrieve the owner for.
function getDarknodeOperator(address _darknodeID)
external
view
returns (address payable)
{
return store.darknodeOperator(_darknodeID);
}
/// @notice Retrieves the bond amount of a darknode in 10^-18 REN.
/// @param _darknodeID The ID of the darknode to retrieve the bond for.
function getDarknodeBond(address _darknodeID)
external
view
returns (uint256)
{
return store.darknodeBond(_darknodeID);
}
/// @notice Retrieves the encryption public key of the darknode.
/// @param _darknodeID The ID of the darknode to retrieve the public key for.
function getDarknodePublicKey(address _darknodeID)
external
view
returns (bytes memory)
{
return store.darknodePublicKey(_darknodeID);
}
/// @notice Retrieves a list of darknodes which are registered for the
/// current epoch.
/// @param _start A darknode ID used as an offset for the list. If _start is
/// 0x0, the first dark node will be used. _start won't be
/// included it is not registered for the epoch.
/// @param _count The number of darknodes to retrieve starting from _start.
/// If _count is 0, all of the darknodes from _start are
/// retrieved. If _count is more than the remaining number of
/// registered darknodes, the rest of the list will contain
/// 0x0s.
function getDarknodes(address _start, uint256 _count)
external
view
returns (address[] memory)
{
uint256 count = _count;
if (count == 0) {
count = numDarknodes;
}
return getDarknodesFromEpochs(_start, count, false);
}
/// @notice Retrieves a list of darknodes which were registered for the
/// previous epoch. See `getDarknodes` for the parameter documentation.
function getPreviousDarknodes(address _start, uint256 _count)
external
view
returns (address[] memory)
{
uint256 count = _count;
if (count == 0) {
count = numDarknodesPreviousEpoch;
}
return getDarknodesFromEpochs(_start, count, true);
}
/// @notice Returns whether a darknode is scheduled to become registered
/// at next epoch.
/// @param _darknodeID The ID of the darknode to return.
function isPendingRegistration(address _darknodeID)
public
view
returns (bool)
{
uint256 registeredAt = store.darknodeRegisteredAt(_darknodeID);
return registeredAt != 0 && registeredAt > currentEpoch.blocktime;
}
/// @notice Returns if a darknode is in the pending deregistered state. In
/// this state a darknode is still considered registered.
function isPendingDeregistration(address _darknodeID)
public
view
returns (bool)
{
uint256 deregisteredAt = store.darknodeDeregisteredAt(_darknodeID);
return deregisteredAt != 0 && deregisteredAt > currentEpoch.blocktime;
}
/// @notice Returns if a darknode is in the deregistered state.
function isDeregistered(address _darknodeID) public view returns (bool) {
uint256 deregisteredAt = store.darknodeDeregisteredAt(_darknodeID);
return _isDeregistered(deregisteredAt, currentEpoch);
}
/// @notice Returns if a darknode can be deregistered. This is true if the
/// darknodes is in the registered state and has not attempted to
/// deregister yet.
function isDeregisterable(address _darknodeID) public view returns (bool) {
DarknodeRegistryStore _store = store;
uint256 deregisteredAt = _store.darknodeDeregisteredAt(_darknodeID);
bool registered = isRegisteredInEpoch(
_store.darknodeRegisteredAt(_darknodeID),
deregisteredAt,
currentEpoch
);
return _isDeregisterable(registered, deregisteredAt);
}
/// @notice Returns if a darknode is in the refunded state. This is true
/// for darknodes that have never been registered, or darknodes that have
/// been deregistered and refunded.
function isRefunded(address _darknodeID) public view returns (bool) {
DarknodeRegistryStore _store = store;
uint256 registeredAt = _store.darknodeRegisteredAt(_darknodeID);
uint256 deregisteredAt = _store.darknodeDeregisteredAt(_darknodeID);
return _isRefunded(registeredAt, deregisteredAt);
}
/// @notice Returns if a darknode is refundable. This is true for darknodes
/// that have been in the deregistered state for one full epoch.
function isRefundable(address _darknodeID) public view returns (bool) {
uint256 deregisteredAt = store.darknodeDeregisteredAt(_darknodeID);
bool deregistered = _isDeregistered(deregisteredAt, currentEpoch);
return
_isRefundable(
deregistered,
deregisteredAt,
previousEpoch,
deregistrationInterval
);
}
/// @notice Returns the registration time of a given darknode.
function darknodeRegisteredAt(address darknodeID)
external
view
returns (uint256)
{
return store.darknodeRegisteredAt(darknodeID);
}
/// @notice Returns the deregistration time of a given darknode.
function darknodeDeregisteredAt(address darknodeID)
external
view
returns (uint256)
{
return store.darknodeDeregisteredAt(darknodeID);
}
/// @notice Returns if a darknode is in the registered state.
function isRegistered(address _darknodeID) public view returns (bool) {
DarknodeRegistryStore _store = store;
uint256 registeredAt = _store.darknodeRegisteredAt(_darknodeID);
uint256 deregisteredAt = _store.darknodeDeregisteredAt(_darknodeID);
return isRegisteredInEpoch(registeredAt, deregisteredAt, currentEpoch);
}
/// @notice Returns if a darknode was in the registered state last epoch.
function isRegisteredInPreviousEpoch(address _darknodeID)
public
view
returns (bool)
{
DarknodeRegistryStore _store = store;
uint256 registeredAt = _store.darknodeRegisteredAt(_darknodeID);
uint256 deregisteredAt = _store.darknodeDeregisteredAt(_darknodeID);
return isRegisteredInEpoch(registeredAt, deregisteredAt, previousEpoch);
}
/// @notice Returns the darknodes registered by the provided operator.
/// @dev THIS IS AN EXPENSIVE CALL - this should only called when using
/// eth_call contract reads - not in transactions.
function getOperatorDarknodes(address _operator)
external
view
returns (address[] memory)
{
address[] memory nodesPadded = new address[](numDarknodes);
address[] memory allNodes = getDarknodesFromEpochs(
address(0),
numDarknodes,
false
);
uint256 j = 0;
for (uint256 i = 0; i < allNodes.length; i++) {
if (store.darknodeOperator(allNodes[i]) == _operator) {
nodesPadded[j] = (allNodes[i]);
j++;
}
}
address[] memory nodes = new address[](j);
for (uint256 i = 0; i < j; i++) {
nodes[i] = nodesPadded[i];
}
return nodes;
}
/// @notice Returns if a darknode was in the registered state for a given
/// epoch.
/// @param _epoch One of currentEpoch, previousEpoch.
function isRegisteredInEpoch(
uint256 _registeredAt,
uint256 _deregisteredAt,
Epoch memory _epoch
) private pure returns (bool) {
bool registered = _registeredAt != 0 &&
_registeredAt <= _epoch.blocktime;
bool notDeregistered = _deregisteredAt == 0 ||
_deregisteredAt > _epoch.blocktime;
// The Darknode has been registered and has not yet been deregistered,
// although it might be pending deregistration
return registered && notDeregistered;
}
/// Private function called by `isDeregistered`, `isRefundable`, and `refundMultiple`.
function _isDeregistered(
uint256 _deregisteredAt,
Epoch memory _currentEpoch
) private pure returns (bool) {
return
_deregisteredAt != 0 && _deregisteredAt <= _currentEpoch.blocktime;
}
/// Private function called by `isDeregisterable` and `deregisterMultiple`.
function _isDeregisterable(bool _registered, uint256 _deregisteredAt)
private
pure
returns (bool)
{
// The Darknode is currently in the registered state and has not been
// transitioned to the pending deregistration, or deregistered, state
return _registered && _deregisteredAt == 0;
}
/// Private function called by `isRefunded` and `registerMultiple`.
function _isRefunded(uint256 registeredAt, uint256 deregisteredAt)
private
pure
returns (bool)
{
return registeredAt == 0 && deregisteredAt == 0;
}
/// Private function called by `isRefundable` and `refundMultiple`.
function _isRefundable(
bool _deregistered,
uint256 _deregisteredAt,
Epoch memory _previousEpoch,
uint256 _deregistrationInterval
) private pure returns (bool) {
return
_deregistered &&
_deregisteredAt <=
(_previousEpoch.blocktime - _deregistrationInterval);
}
/// @notice Returns a list of darknodes registered for either the current
/// or the previous epoch. See `getDarknodes` for documentation on the
/// parameters `_start` and `_count`.
/// @param _usePreviousEpoch If true, use the previous epoch, otherwise use
/// the current epoch.
function getDarknodesFromEpochs(
address _start,
uint256 _count,
bool _usePreviousEpoch
) private view returns (address[] memory) {
uint256 count = _count;
if (count == 0) {
count = numDarknodes;
}
address[] memory nodes = new address[](count);
// Begin with the first node in the list
uint256 n = 0;
address next = _start;
if (next == address(0)) {
next = store.begin();
}
// Iterate until all registered Darknodes have been collected
while (n < count) {
if (next == address(0)) {
break;
}
// Only include Darknodes that are currently registered
bool includeNext;
if (_usePreviousEpoch) {
includeNext = isRegisteredInPreviousEpoch(next);
} else {
includeNext = isRegistered(next);
}
if (!includeNext) {
next = store.next(next);
continue;
}
nodes[n] = next;
next = store.next(next);
n += 1;
}
return nodes;
}
/// Private function called by `deregister` and `slash`
function deregisterDarknode(address _darknodeID) private {
address darknodeOperator = store.darknodeOperator(_darknodeID);
// Flag the darknode for deregistration
store.updateDarknodeDeregisteredAt(
_darknodeID,
currentEpoch.blocktime.add(minimumEpochInterval)
);
numDarknodesNextEpoch = numDarknodesNextEpoch.sub(1);
// Emit an event
emit LogDarknodeDeregistered(darknodeOperator, _darknodeID);
}
function getDarknodeCountFromEpochs()
private
view
returns (
uint256,
uint256,
uint256
)
{
// Begin with the first node in the list
uint256 nPreviousEpoch = 0;
uint256 nCurrentEpoch = 0;
uint256 nNextEpoch = 0;
address next = store.begin();
// Iterate until all registered Darknodes have been collected
while (true) {
// End of darknode list.
if (next == address(0)) {
break;
}
if (isRegisteredInPreviousEpoch(next)) {
nPreviousEpoch += 1;
}
if (isRegistered(next)) {
nCurrentEpoch += 1;
}
// Darknode is registered and has not deregistered, or is pending
// becoming registered.
if (
((isRegistered(next) && !isPendingDeregistration(next)) ||
isPendingRegistration(next))
) {
nNextEpoch += 1;
}
next = store.next(next);
}
return (nPreviousEpoch, nCurrentEpoch, nNextEpoch);
}
}
/* solium-disable-next-line no-empty-blocks */
contract DarknodeRegistryProxy is InitializableAdminUpgradeabilityProxy {
}
pragma solidity 0.5.17;
import "@openzeppelin/contracts-ethereum-package/contracts/math/SafeMath.sol";
import "../Governance/Claimable.sol";
import "../libraries/LinkedList.sol";
import "../RenToken/RenToken.sol";
import "../libraries/CanReclaimTokens.sol";
/// @notice This contract stores data and funds for the DarknodeRegistry
/// contract. The data / fund logic and storage have been separated to improve
/// upgradability.
contract DarknodeRegistryStore is Claimable, CanReclaimTokens {
using SafeMath for uint256;
string public VERSION; // Passed in as a constructor parameter.
/// @notice Darknodes are stored in the darknode struct. The owner is the
/// address that registered the darknode, the bond is the amount of REN that
/// was transferred during registration, and the public key is the
/// encryption key that should be used when sending sensitive information to
/// the darknode.
struct Darknode {
// The owner of a Darknode is the address that called the register
// function. The owner is the only address that is allowed to
// deregister the Darknode, unless the Darknode is slashed for
// malicious behavior.
address payable owner;
// The bond is the amount of REN submitted as a bond by the Darknode.
// This amount is reduced when the Darknode is slashed for malicious
// behavior.
uint256 bond;
// The block number at which the Darknode is considered registered.
uint256 registeredAt;
// The block number at which the Darknode is considered deregistered.
uint256 deregisteredAt;
// The public key used by this Darknode for encrypting sensitive data
// off chain. It is assumed that the Darknode has access to the
// respective private key, and that there is an agreement on the format
// of the public key.
bytes publicKey;
}
/// Registry data.
mapping(address => Darknode) private darknodeRegistry;
LinkedList.List private darknodes;
// RenToken.
RenToken public ren;
/// @notice The contract constructor.
///
/// @param _VERSION A string defining the contract version.
/// @param _ren The address of the RenToken contract.
constructor(string memory _VERSION, RenToken _ren) public {
Claimable.initialize(msg.sender);
CanReclaimTokens.initialize(msg.sender);
VERSION = _VERSION;
ren = _ren;
blacklistRecoverableToken(address(ren));
}
/// @notice Instantiates a darknode and appends it to the darknodes
/// linked-list.
///
/// @param _darknodeID The darknode's ID.
/// @param _darknodeOperator The darknode's owner's address.
/// @param _bond The darknode's bond value.
/// @param _publicKey The darknode's public key.
/// @param _registeredAt The time stamp when the darknode is registered.
/// @param _deregisteredAt The time stamp when the darknode is deregistered.
function appendDarknode(
address _darknodeID,
address payable _darknodeOperator,
uint256 _bond,
bytes calldata _publicKey,
uint256 _registeredAt,
uint256 _deregisteredAt
) external onlyOwner {
Darknode memory darknode =
Darknode({
owner: _darknodeOperator,
bond: _bond,
publicKey: _publicKey,
registeredAt: _registeredAt,
deregisteredAt: _deregisteredAt
});
darknodeRegistry[_darknodeID] = darknode;
LinkedList.append(darknodes, _darknodeID);
}
/// @notice Returns the address of the first darknode in the store.
function begin() external view onlyOwner returns (address) {
return LinkedList.begin(darknodes);
}
/// @notice Returns the address of the next darknode in the store after the
/// given address.
function next(address darknodeID)
external
view
onlyOwner
returns (address)
{
return LinkedList.next(darknodes, darknodeID);
}
/// @notice Removes a darknode from the store and transfers its bond to the
/// owner of this contract.
function removeDarknode(address darknodeID) external onlyOwner {
uint256 bond = darknodeRegistry[darknodeID].bond;
delete darknodeRegistry[darknodeID];
LinkedList.remove(darknodes, darknodeID);
require(
ren.transfer(owner(), bond),
"DarknodeRegistryStore: bond transfer failed"
);
}
/// @notice Updates the bond of a darknode. The new bond must be smaller
/// than the previous bond of the darknode.
function updateDarknodeBond(address darknodeID, uint256 decreasedBond)
external
onlyOwner
{
uint256 previousBond = darknodeRegistry[darknodeID].bond;
require(
decreasedBond < previousBond,
"DarknodeRegistryStore: bond not decreased"
);
darknodeRegistry[darknodeID].bond = decreasedBond;
require(
ren.transfer(owner(), previousBond.sub(decreasedBond)),
"DarknodeRegistryStore: bond transfer failed"
);
}
/// @notice Updates the deregistration timestamp of a darknode.
function updateDarknodeDeregisteredAt(
address darknodeID,
uint256 deregisteredAt
) external onlyOwner {
darknodeRegistry[darknodeID].deregisteredAt = deregisteredAt;
}
/// @notice Returns the owner of a given darknode.
function darknodeOperator(address darknodeID)
external
view
onlyOwner
returns (address payable)
{
return darknodeRegistry[darknodeID].owner;
}
/// @notice Returns the bond of a given darknode.
function darknodeBond(address darknodeID)
external
view
onlyOwner
returns (uint256)
{
return darknodeRegistry[darknodeID].bond;
}
/// @notice Returns the registration time of a given darknode.
function darknodeRegisteredAt(address darknodeID)
external
view
onlyOwner
returns (uint256)
{
return darknodeRegistry[darknodeID].registeredAt;
}
/// @notice Returns the deregistration time of a given darknode.
function darknodeDeregisteredAt(address darknodeID)
external
view
onlyOwner
returns (uint256)
{
return darknodeRegistry[darknodeID].deregisteredAt;
}
/// @notice Returns the encryption public key of a given darknode.
function darknodePublicKey(address darknodeID)
external
view
onlyOwner
returns (bytes memory)
{
return darknodeRegistry[darknodeID].publicKey;
}
}
pragma solidity 0.5.17;
import "@openzeppelin/contracts-ethereum-package/contracts/math/SafeMath.sol";
import "@openzeppelin/upgrades/contracts/upgradeability/InitializableAdminUpgradeabilityProxy.sol";
import "@openzeppelin/upgrades/contracts/Initializable.sol";
import "../RenToken/RenToken.sol";
import "./DarknodeRegistryStore.sol";
import "../Governance/Claimable.sol";
import "../libraries/CanReclaimTokens.sol";
interface IDarknodePaymentStore {}
interface IDarknodePayment {
function changeCycle() external returns (uint256);
function store() external view returns (IDarknodePaymentStore);
}
interface IDarknodeSlasher {}
contract DarknodeRegistryStateV1 {
using SafeMath for uint256;
string public VERSION; // Passed in as a constructor parameter.
/// @notice Darknode pods are shuffled after a fixed number of blocks.
/// An Epoch stores an epoch hash used as an (insecure) RNG seed, and the
/// blocknumber which restricts when the next epoch can be called.
struct Epoch {
uint256 epochhash;
uint256 blocktime;
}
uint256 public numDarknodes;
uint256 public numDarknodesNextEpoch;
uint256 public numDarknodesPreviousEpoch;
/// Variables used to parameterize behavior.
uint256 public minimumBond;
uint256 public minimumPodSize;
uint256 public minimumEpochInterval;
uint256 public deregistrationInterval;
/// When one of the above variables is modified, it is only updated when the
/// next epoch is called. These variables store the values for the next
/// epoch.
uint256 public nextMinimumBond;
uint256 public nextMinimumPodSize;
uint256 public nextMinimumEpochInterval;
/// The current and previous epoch.
Epoch public currentEpoch;
Epoch public previousEpoch;
/// REN ERC20 contract used to transfer bonds.
RenToken public ren;
/// Darknode Registry Store is the storage contract for darknodes.
DarknodeRegistryStore public store;
/// The Darknode Payment contract for changing cycle.
IDarknodePayment public darknodePayment;
/// Darknode Slasher allows darknodes to vote on bond slashing.
IDarknodeSlasher public slasher;
IDarknodeSlasher public nextSlasher;
}
/// @notice DarknodeRegistry is responsible for the registration and
/// deregistration of Darknodes.
contract DarknodeRegistryLogicV1 is
Claimable,
CanReclaimTokens,
DarknodeRegistryStateV1
{
/// @notice Emitted when a darknode is registered.
/// @param _darknodeOperator The owner of the darknode.
/// @param _darknodeID The ID of the darknode that was registered.
/// @param _bond The amount of REN that was transferred as bond.
event LogDarknodeRegistered(
address indexed _darknodeOperator,
address indexed _darknodeID,
uint256 _bond
);
/// @notice Emitted when a darknode is deregistered.
/// @param _darknodeOperator The owner of the darknode.
/// @param _darknodeID The ID of the darknode that was deregistered.
event LogDarknodeDeregistered(
address indexed _darknodeOperator,
address indexed _darknodeID
);
/// @notice Emitted when a refund has been made.
/// @param _darknodeOperator The owner of the darknode.
/// @param _amount The amount of REN that was refunded.
event LogDarknodeRefunded(
address indexed _darknodeOperator,
address indexed _darknodeID,
uint256 _amount
);
/// @notice Emitted when a darknode's bond is slashed.
/// @param _darknodeOperator The owner of the darknode.
/// @param _darknodeID The ID of the darknode that was slashed.
/// @param _challenger The address of the account that submitted the challenge.
/// @param _percentage The total percentage of bond slashed.
event LogDarknodeSlashed(
address indexed _darknodeOperator,
address indexed _darknodeID,
address indexed _challenger,
uint256 _percentage
);
/// @notice Emitted when a new epoch has begun.
event LogNewEpoch(uint256 indexed epochhash);
/// @notice Emitted when a constructor parameter has been updated.
event LogMinimumBondUpdated(
uint256 _previousMinimumBond,
uint256 _nextMinimumBond
);
event LogMinimumPodSizeUpdated(
uint256 _previousMinimumPodSize,
uint256 _nextMinimumPodSize
);
event LogMinimumEpochIntervalUpdated(
uint256 _previousMinimumEpochInterval,
uint256 _nextMinimumEpochInterval
);
event LogSlasherUpdated(
address indexed _previousSlasher,
address indexed _nextSlasher
);
event LogDarknodePaymentUpdated(
IDarknodePayment indexed _previousDarknodePayment,
IDarknodePayment indexed _nextDarknodePayment
);
/// @notice Restrict a function to the owner that registered the darknode.
modifier onlyDarknodeOperator(address _darknodeID) {
require(
store.darknodeOperator(_darknodeID) == msg.sender,
"DarknodeRegistry: must be darknode owner"
);
_;
}
/// @notice Restrict a function to unregistered darknodes.
modifier onlyRefunded(address _darknodeID) {
require(
isRefunded(_darknodeID),
"DarknodeRegistry: must be refunded or never registered"
);
_;
}
/// @notice Restrict a function to refundable darknodes.
modifier onlyRefundable(address _darknodeID) {
require(
isRefundable(_darknodeID),
"DarknodeRegistry: must be deregistered for at least one epoch"
);
_;
}
/// @notice Restrict a function to registered nodes without a pending
/// deregistration.
modifier onlyDeregisterable(address _darknodeID) {
require(
isDeregisterable(_darknodeID),
"DarknodeRegistry: must be deregisterable"
);
_;
}
/// @notice Restrict a function to the Slasher contract.
modifier onlySlasher() {
require(
address(slasher) == msg.sender,
"DarknodeRegistry: must be slasher"
);
_;
}
/// @notice Restrict a function to registered nodes without a pending
/// deregistration.
modifier onlyDarknode(address _darknodeID) {
require(
isRegistered(_darknodeID),
"DarknodeRegistry: invalid darknode"
);
_;
}
/// @notice The contract constructor.
///
/// @param _VERSION A string defining the contract version.
/// @param _renAddress The address of the RenToken contract.
/// @param _storeAddress The address of the DarknodeRegistryStore contract.
/// @param _minimumBond The minimum bond amount that can be submitted by a
/// Darknode.
/// @param _minimumPodSize The minimum size of a Darknode pod.
/// @param _minimumEpochIntervalSeconds The minimum number of seconds between epochs.
function initialize(
string memory _VERSION,
RenToken _renAddress,
DarknodeRegistryStore _storeAddress,
uint256 _minimumBond,
uint256 _minimumPodSize,
uint256 _minimumEpochIntervalSeconds,
uint256 _deregistrationIntervalSeconds
) public initializer {
Claimable.initialize(msg.sender);
CanReclaimTokens.initialize(msg.sender);
VERSION = _VERSION;
store = _storeAddress;
ren = _renAddress;
minimumBond = _minimumBond;
nextMinimumBond = minimumBond;
minimumPodSize = _minimumPodSize;
nextMinimumPodSize = minimumPodSize;
minimumEpochInterval = _minimumEpochIntervalSeconds;
nextMinimumEpochInterval = minimumEpochInterval;
deregistrationInterval = _deregistrationIntervalSeconds;
uint256 epochhash = uint256(blockhash(block.number - 1));
currentEpoch = Epoch({
epochhash: epochhash,
blocktime: block.timestamp
});
emit LogNewEpoch(epochhash);
}
/// @notice Register a darknode and transfer the bond to this contract.
/// Before registering, the bond transfer must be approved in the REN
/// contract. The caller must provide a public encryption key for the
/// darknode. The darknode will remain pending registration until the next
/// epoch. Only after this period can the darknode be deregistered. The
/// caller of this method will be stored as the owner of the darknode.
///
/// @param _darknodeID The darknode ID that will be registered.
/// @param _publicKey The public key of the darknode. It is stored to allow
/// other darknodes and traders to encrypt messages to the trader.
function register(address _darknodeID, bytes calldata _publicKey)
external
onlyRefunded(_darknodeID)
{
require(
_darknodeID != address(0),
"DarknodeRegistry: darknode address cannot be zero"
);
// Use the current minimum bond as the darknode's bond and transfer bond to store
require(
ren.transferFrom(msg.sender, address(store), minimumBond),
"DarknodeRegistry: bond transfer failed"
);
// Flag this darknode for registration
store.appendDarknode(
_darknodeID,
msg.sender,
minimumBond,
_publicKey,
currentEpoch.blocktime.add(minimumEpochInterval),
0
);
numDarknodesNextEpoch = numDarknodesNextEpoch.add(1);
// Emit an event.
emit LogDarknodeRegistered(msg.sender, _darknodeID, minimumBond);
}
/// @notice Deregister a darknode. The darknode will not be deregistered
/// until the end of the epoch. After another epoch, the bond can be
/// refunded by calling the refund method.
/// @param _darknodeID The darknode ID that will be deregistered. The caller
/// of this method must be the owner of this darknode.
function deregister(address _darknodeID)
external
onlyDeregisterable(_darknodeID)
onlyDarknodeOperator(_darknodeID)
{
deregisterDarknode(_darknodeID);
}
/// @notice Progress the epoch if it is possible to do so. This captures
/// the current timestamp and current blockhash and overrides the current
/// epoch.
function epoch() external {
if (previousEpoch.blocktime == 0) {
// The first epoch must be called by the owner of the contract
require(
msg.sender == owner(),
"DarknodeRegistry: not authorized to call first epoch"
);
}
// Require that the epoch interval has passed
require(
block.timestamp >= currentEpoch.blocktime.add(minimumEpochInterval),
"DarknodeRegistry: epoch interval has not passed"
);
uint256 epochhash = uint256(blockhash(block.number - 1));
// Update the epoch hash and timestamp
previousEpoch = currentEpoch;
currentEpoch = Epoch({
epochhash: epochhash,
blocktime: block.timestamp
});
// Update the registry information
numDarknodesPreviousEpoch = numDarknodes;
numDarknodes = numDarknodesNextEpoch;
// If any update functions have been called, update the values now
if (nextMinimumBond != minimumBond) {
minimumBond = nextMinimumBond;
emit LogMinimumBondUpdated(minimumBond, nextMinimumBond);
}
if (nextMinimumPodSize != minimumPodSize) {
minimumPodSize = nextMinimumPodSize;
emit LogMinimumPodSizeUpdated(minimumPodSize, nextMinimumPodSize);
}
if (nextMinimumEpochInterval != minimumEpochInterval) {
minimumEpochInterval = nextMinimumEpochInterval;
emit LogMinimumEpochIntervalUpdated(
minimumEpochInterval,
nextMinimumEpochInterval
);
}
if (nextSlasher != slasher) {
slasher = nextSlasher;
emit LogSlasherUpdated(address(slasher), address(nextSlasher));
}
if (address(darknodePayment) != address(0x0)) {
darknodePayment.changeCycle();
}
// Emit an event
emit LogNewEpoch(epochhash);
}
/// @notice Allows the contract owner to initiate an ownership transfer of
/// the DarknodeRegistryStore.
/// @param _newOwner The address to transfer the ownership to.
function transferStoreOwnership(DarknodeRegistryLogicV1 _newOwner)
external
onlyOwner
{
store.transferOwnership(address(_newOwner));
_newOwner.claimStoreOwnership();
}
/// @notice Claims ownership of the store passed in to the constructor.
/// `transferStoreOwnership` must have previously been called when
/// transferring from another Darknode Registry.
function claimStoreOwnership() external {
store.claimOwnership();
// Sync state with new store.
// Note: numDarknodesPreviousEpoch is set to 0 for a newly deployed DNR.
(
numDarknodesPreviousEpoch,
numDarknodes,
numDarknodesNextEpoch
) = getDarknodeCountFromEpochs();
}
/// @notice Allows the contract owner to update the address of the
/// darknode payment contract.
/// @param _darknodePayment The address of the Darknode Payment
/// contract.
function updateDarknodePayment(IDarknodePayment _darknodePayment)
external
onlyOwner
{
require(
address(_darknodePayment) != address(0x0),
"DarknodeRegistry: invalid Darknode Payment address"
);
IDarknodePayment previousDarknodePayment = darknodePayment;
darknodePayment = _darknodePayment;
emit LogDarknodePaymentUpdated(
previousDarknodePayment,
darknodePayment
);
}
/// @notice Allows the contract owner to update the minimum bond.
/// @param _nextMinimumBond The minimum bond amount that can be submitted by
/// a darknode.
function updateMinimumBond(uint256 _nextMinimumBond) external onlyOwner {
// Will be updated next epoch
nextMinimumBond = _nextMinimumBond;
}
/// @notice Allows the contract owner to update the minimum pod size.
/// @param _nextMinimumPodSize The minimum size of a pod.
function updateMinimumPodSize(uint256 _nextMinimumPodSize)
external
onlyOwner
{
// Will be updated next epoch
nextMinimumPodSize = _nextMinimumPodSize;
}
/// @notice Allows the contract owner to update the minimum epoch interval.
/// @param _nextMinimumEpochInterval The minimum number of blocks between epochs.
function updateMinimumEpochInterval(uint256 _nextMinimumEpochInterval)
external
onlyOwner
{
// Will be updated next epoch
nextMinimumEpochInterval = _nextMinimumEpochInterval;
}
/// @notice Allow the contract owner to update the DarknodeSlasher contract
/// address.
/// @param _slasher The new slasher address.
function updateSlasher(IDarknodeSlasher _slasher) external onlyOwner {
require(
address(_slasher) != address(0),
"DarknodeRegistry: invalid slasher address"
);
nextSlasher = _slasher;
}
/// @notice Allow the DarknodeSlasher contract to slash a portion of darknode's
/// bond and deregister it.
/// @param _guilty The guilty prover whose bond is being slashed.
/// @param _challenger The challenger who should receive a portion of the bond as reward.
/// @param _percentage The total percentage of bond to be slashed.
function slash(
address _guilty,
address _challenger,
uint256 _percentage
) external onlySlasher onlyDarknode(_guilty) {
require(_percentage <= 100, "DarknodeRegistry: invalid percent");
// If the darknode has not been deregistered then deregister it
if (isDeregisterable(_guilty)) {
deregisterDarknode(_guilty);
}
uint256 totalBond = store.darknodeBond(_guilty);
uint256 penalty = totalBond.div(100).mul(_percentage);
uint256 challengerReward = penalty.div(2);
uint256 darknodePaymentReward = penalty.sub(challengerReward);
if (challengerReward > 0) {
// Slash the bond of the failed prover
store.updateDarknodeBond(_guilty, totalBond.sub(penalty));
// Distribute the remaining bond into the darknode payment reward pool
require(
address(darknodePayment) != address(0x0),
"DarknodeRegistry: invalid payment address"
);
require(
ren.transfer(
address(darknodePayment.store()),
darknodePaymentReward
),
"DarknodeRegistry: reward transfer failed"
);
require(
ren.transfer(_challenger, challengerReward),
"DarknodeRegistry: reward transfer failed"
);
}
emit LogDarknodeSlashed(
store.darknodeOperator(_guilty),
_guilty,
_challenger,
_percentage
);
}
/// @notice Refund the bond of a deregistered darknode. This will make the
/// darknode available for registration again. Anyone can call this function
/// but the bond will always be refunded to the darknode operator.
///
/// @param _darknodeID The darknode ID that will be refunded.
function refund(address _darknodeID) external onlyRefundable(_darknodeID) {
address darknodeOperator = store.darknodeOperator(_darknodeID);
// Remember the bond amount
uint256 amount = store.darknodeBond(_darknodeID);
// Erase the darknode from the registry
store.removeDarknode(_darknodeID);
// Refund the operator by transferring REN
require(
ren.transfer(darknodeOperator, amount),
"DarknodeRegistry: bond transfer failed"
);
// Emit an event.
emit LogDarknodeRefunded(darknodeOperator, _darknodeID, amount);
}
/// @notice Retrieves the address of the account that registered a darknode.
/// @param _darknodeID The ID of the darknode to retrieve the owner for.
function getDarknodeOperator(address _darknodeID)
external
view
returns (address payable)
{
return store.darknodeOperator(_darknodeID);
}
/// @notice Retrieves the bond amount of a darknode in 10^-18 REN.
/// @param _darknodeID The ID of the darknode to retrieve the bond for.
function getDarknodeBond(address _darknodeID)
external
view
returns (uint256)
{
return store.darknodeBond(_darknodeID);
}
/// @notice Retrieves the encryption public key of the darknode.
/// @param _darknodeID The ID of the darknode to retrieve the public key for.
function getDarknodePublicKey(address _darknodeID)
external
view
returns (bytes memory)
{
return store.darknodePublicKey(_darknodeID);
}
/// @notice Retrieves a list of darknodes which are registered for the
/// current epoch.
/// @param _start A darknode ID used as an offset for the list. If _start is
/// 0x0, the first dark node will be used. _start won't be
/// included it is not registered for the epoch.
/// @param _count The number of darknodes to retrieve starting from _start.
/// If _count is 0, all of the darknodes from _start are
/// retrieved. If _count is more than the remaining number of
/// registered darknodes, the rest of the list will contain
/// 0x0s.
function getDarknodes(address _start, uint256 _count)
external
view
returns (address[] memory)
{
uint256 count = _count;
if (count == 0) {
count = numDarknodes;
}
return getDarknodesFromEpochs(_start, count, false);
}
/// @notice Retrieves a list of darknodes which were registered for the
/// previous epoch. See `getDarknodes` for the parameter documentation.
function getPreviousDarknodes(address _start, uint256 _count)
external
view
returns (address[] memory)
{
uint256 count = _count;
if (count == 0) {
count = numDarknodesPreviousEpoch;
}
return getDarknodesFromEpochs(_start, count, true);
}
/// @notice Returns whether a darknode is scheduled to become registered
/// at next epoch.
/// @param _darknodeID The ID of the darknode to return.
function isPendingRegistration(address _darknodeID)
public
view
returns (bool)
{
uint256 registeredAt = store.darknodeRegisteredAt(_darknodeID);
return registeredAt != 0 && registeredAt > currentEpoch.blocktime;
}
/// @notice Returns if a darknode is in the pending deregistered state. In
/// this state a darknode is still considered registered.
function isPendingDeregistration(address _darknodeID)
public
view
returns (bool)
{
uint256 deregisteredAt = store.darknodeDeregisteredAt(_darknodeID);
return deregisteredAt != 0 && deregisteredAt > currentEpoch.blocktime;
}
/// @notice Returns if a darknode is in the deregistered state.
function isDeregistered(address _darknodeID) public view returns (bool) {
uint256 deregisteredAt = store.darknodeDeregisteredAt(_darknodeID);
return deregisteredAt != 0 && deregisteredAt <= currentEpoch.blocktime;
}
/// @notice Returns if a darknode can be deregistered. This is true if the
/// darknodes is in the registered state and has not attempted to
/// deregister yet.
function isDeregisterable(address _darknodeID) public view returns (bool) {
uint256 deregisteredAt = store.darknodeDeregisteredAt(_darknodeID);
// The Darknode is currently in the registered state and has not been
// transitioned to the pending deregistration, or deregistered, state
return isRegistered(_darknodeID) && deregisteredAt == 0;
}
/// @notice Returns if a darknode is in the refunded state. This is true
/// for darknodes that have never been registered, or darknodes that have
/// been deregistered and refunded.
function isRefunded(address _darknodeID) public view returns (bool) {
uint256 registeredAt = store.darknodeRegisteredAt(_darknodeID);
uint256 deregisteredAt = store.darknodeDeregisteredAt(_darknodeID);
return registeredAt == 0 && deregisteredAt == 0;
}
/// @notice Returns if a darknode is refundable. This is true for darknodes
/// that have been in the deregistered state for one full epoch.
function isRefundable(address _darknodeID) public view returns (bool) {
return
isDeregistered(_darknodeID) &&
store.darknodeDeregisteredAt(_darknodeID) <=
(previousEpoch.blocktime - deregistrationInterval);
}
/// @notice Returns the registration time of a given darknode.
function darknodeRegisteredAt(address darknodeID)
external
view
returns (uint256)
{
return store.darknodeRegisteredAt(darknodeID);
}
/// @notice Returns the deregistration time of a given darknode.
function darknodeDeregisteredAt(address darknodeID)
external
view
returns (uint256)
{
return store.darknodeDeregisteredAt(darknodeID);
}
/// @notice Returns if a darknode is in the registered state.
function isRegistered(address _darknodeID) public view returns (bool) {
return isRegisteredInEpoch(_darknodeID, currentEpoch);
}
/// @notice Returns if a darknode was in the registered state last epoch.
function isRegisteredInPreviousEpoch(address _darknodeID)
public
view
returns (bool)
{
return isRegisteredInEpoch(_darknodeID, previousEpoch);
}
/// @notice Returns if a darknode was in the registered state for a given
/// epoch.
/// @param _darknodeID The ID of the darknode.
/// @param _epoch One of currentEpoch, previousEpoch.
function isRegisteredInEpoch(address _darknodeID, Epoch memory _epoch)
private
view
returns (bool)
{
uint256 registeredAt = store.darknodeRegisteredAt(_darknodeID);
uint256 deregisteredAt = store.darknodeDeregisteredAt(_darknodeID);
bool registered = registeredAt != 0 && registeredAt <= _epoch.blocktime;
bool notDeregistered = deregisteredAt == 0 ||
deregisteredAt > _epoch.blocktime;
// The Darknode has been registered and has not yet been deregistered,
// although it might be pending deregistration
return registered && notDeregistered;
}
/// @notice Returns a list of darknodes registered for either the current
/// or the previous epoch. See `getDarknodes` for documentation on the
/// parameters `_start` and `_count`.
/// @param _usePreviousEpoch If true, use the previous epoch, otherwise use
/// the current epoch.
function getDarknodesFromEpochs(
address _start,
uint256 _count,
bool _usePreviousEpoch
) private view returns (address[] memory) {
uint256 count = _count;
if (count == 0) {
count = numDarknodes;
}
address[] memory nodes = new address[](count);
// Begin with the first node in the list
uint256 n = 0;
address next = _start;
if (next == address(0)) {
next = store.begin();
}
// Iterate until all registered Darknodes have been collected
while (n < count) {
if (next == address(0)) {
break;
}
// Only include Darknodes that are currently registered
bool includeNext;
if (_usePreviousEpoch) {
includeNext = isRegisteredInPreviousEpoch(next);
} else {
includeNext = isRegistered(next);
}
if (!includeNext) {
next = store.next(next);
continue;
}
nodes[n] = next;
next = store.next(next);
n += 1;
}
return nodes;
}
/// Private function called by `deregister` and `slash`
function deregisterDarknode(address _darknodeID) private {
address darknodeOperator = store.darknodeOperator(_darknodeID);
// Flag the darknode for deregistration
store.updateDarknodeDeregisteredAt(
_darknodeID,
currentEpoch.blocktime.add(minimumEpochInterval)
);
numDarknodesNextEpoch = numDarknodesNextEpoch.sub(1);
// Emit an event
emit LogDarknodeDeregistered(darknodeOperator, _darknodeID);
}
function getDarknodeCountFromEpochs()
private
view
returns (
uint256,
uint256,
uint256
)
{
// Begin with the first node in the list
uint256 nPreviousEpoch = 0;
uint256 nCurrentEpoch = 0;
uint256 nNextEpoch = 0;
address next = store.begin();
// Iterate until all registered Darknodes have been collected
while (true) {
// End of darknode list.
if (next == address(0)) {
break;
}
if (isRegisteredInPreviousEpoch(next)) {
nPreviousEpoch += 1;
}
if (isRegistered(next)) {
nCurrentEpoch += 1;
}
// Darknode is registered and has not deregistered, or is pending
// becoming registered.
if (
((isRegistered(next) && !isPendingDeregistration(next)) ||
isPendingRegistration(next))
) {
nNextEpoch += 1;
}
next = store.next(next);
}
return (nPreviousEpoch, nCurrentEpoch, nNextEpoch);
}
}
pragma solidity ^0.5.17;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts-ethereum-package/contracts/ownership/Ownable.sol";
import "./DarknodeRegistry.sol";
import "../Governance/RenProxyAdmin.sol";
import "../RenToken/RenToken.sol";
import "./DarknodeRegistryV1ToV2Upgrader.sol";
contract DarknodeRegistryV1ToV2Preupgrader is Ownable {
DarknodeRegistryLogicV1 public darknodeRegistryProxy;
DarknodeRegistryV1ToV2Upgrader public upgrader;
address public previousDarknodeRegistryOwner;
constructor(
DarknodeRegistryLogicV1 _darknodeRegistryProxy,
DarknodeRegistryV1ToV2Upgrader _upgrader
) public {
Ownable.initialize(msg.sender);
darknodeRegistryProxy = _darknodeRegistryProxy;
upgrader = _upgrader;
previousDarknodeRegistryOwner = darknodeRegistryProxy.owner();
}
function claimStoreOwnership() public {
darknodeRegistryProxy.store().claimOwnership();
}
function recover(
address[] calldata _darknodeIDs,
address _bondRecipient,
bytes[] calldata _signatures
) external onlyOwner {
forwardDNR();
RenToken ren = darknodeRegistryProxy.ren();
DarknodeRegistryStore store = darknodeRegistryProxy.store();
darknodeRegistryProxy.transferStoreOwnership(
DarknodeRegistryLogicV1(address(this))
);
if (darknodeRegistryProxy.store().owner() != address(this)) {
claimStoreOwnership();
}
(, uint256 currentEpochBlocktime) = darknodeRegistryProxy
.currentEpoch();
uint256 total = 0;
for (uint8 i = 0; i < _darknodeIDs.length; i++) {
address _darknodeID = _darknodeIDs[i];
// Require darknode to be refundable.
{
uint256 deregisteredAt = store.darknodeDeregisteredAt(
_darknodeID
);
bool deregistered = deregisteredAt != 0 &&
deregisteredAt <= currentEpochBlocktime;
require(
deregistered,
"DarknodeRegistryV1Preupgrader: must be deregistered"
);
}
address darknodeOperator = store.darknodeOperator(_darknodeID);
require(
ECDSA.recover(
keccak256(
abi.encodePacked(
"\x19Ethereum Signed Message:\n64",
"DarknodeRegistry.recover",
_darknodeID,
_bondRecipient
)
),
_signatures[i]
) == darknodeOperator,
"DarknodeRegistryV1Preupgrader: invalid signature"
);
// Remember the bond amount
total += store.darknodeBond(_darknodeID);
// Erase the darknode from the registry
store.removeDarknode(_darknodeID);
// // Refund the operator by transferring REN
}
require(
ren.transfer(_bondRecipient, total),
"DarknodeRegistryV1Preupgrader: bond transfer failed"
);
store.transferOwnership(address(darknodeRegistryProxy));
darknodeRegistryProxy.claimStoreOwnership();
}
function forwardDNR() public onlyOwner {
// Claim ownership
if (darknodeRegistryProxy.owner() != address(this)) {
darknodeRegistryProxy.claimOwnership();
}
// Set pending owner to upgrader.
if (darknodeRegistryProxy.pendingOwner() != address(upgrader)) {
darknodeRegistryProxy.transferOwnership(address(upgrader));
}
}
function returnDNR() public onlyOwner {
darknodeRegistryProxy.transferOwnership(previousDarknodeRegistryOwner);
}
}
pragma solidity ^0.5.17;
import "@openzeppelin/contracts-ethereum-package/contracts/ownership/Ownable.sol";
import "./DarknodeRegistry.sol";
import "../Governance/RenProxyAdmin.sol";
contract DarknodeRegistryV1ToV2Upgrader is Ownable {
RenProxyAdmin public renProxyAdmin;
DarknodeRegistryLogicV1 public darknodeRegistryProxy;
DarknodeRegistryLogicV2 public darknodeRegistryLogicV2;
address public previousAdminOwner;
address public previousDarknodeRegistryOwner;
constructor(
RenProxyAdmin _renProxyAdmin,
DarknodeRegistryLogicV1 _darknodeRegistryProxy,
DarknodeRegistryLogicV2 _darknodeRegistryLogicV2
) public {
Ownable.initialize(msg.sender);
renProxyAdmin = _renProxyAdmin;
darknodeRegistryProxy = _darknodeRegistryProxy;
darknodeRegistryLogicV2 = _darknodeRegistryLogicV2;
previousAdminOwner = renProxyAdmin.owner();
previousDarknodeRegistryOwner = darknodeRegistryProxy.owner();
}
function upgrade() public onlyOwner {
// Pre-checks
uint256 numDarknodes = darknodeRegistryProxy.numDarknodes();
uint256 numDarknodesNextEpoch = darknodeRegistryProxy
.numDarknodesNextEpoch();
uint256 numDarknodesPreviousEpoch = darknodeRegistryProxy
.numDarknodesPreviousEpoch();
uint256 minimumBond = darknodeRegistryProxy.minimumBond();
uint256 minimumPodSize = darknodeRegistryProxy.minimumPodSize();
uint256 minimumEpochInterval = darknodeRegistryProxy
.minimumEpochInterval();
uint256 deregistrationInterval = darknodeRegistryProxy
.deregistrationInterval();
RenToken ren = darknodeRegistryProxy.ren();
DarknodeRegistryStore store = darknodeRegistryProxy.store();
IDarknodePayment darknodePayment = darknodeRegistryProxy
.darknodePayment();
// Claim and update.
darknodeRegistryProxy.claimOwnership();
renProxyAdmin.upgrade(
AdminUpgradeabilityProxy(
// Cast gateway instance to payable address
address(uint160(address(darknodeRegistryProxy)))
),
address(darknodeRegistryLogicV2)
);
// Post-checks
require(
numDarknodes == darknodeRegistryProxy.numDarknodes(),
"Migrator: expected 'numDarknodes' not to change"
);
require(
numDarknodesNextEpoch ==
darknodeRegistryProxy.numDarknodesNextEpoch(),
"Migrator: expected 'numDarknodesNextEpoch' not to change"
);
require(
numDarknodesPreviousEpoch ==
darknodeRegistryProxy.numDarknodesPreviousEpoch(),
"Migrator: expected 'numDarknodesPreviousEpoch' not to change"
);
require(
minimumBond == darknodeRegistryProxy.minimumBond(),
"Migrator: expected 'minimumBond' not to change"
);
require(
minimumPodSize == darknodeRegistryProxy.minimumPodSize(),
"Migrator: expected 'minimumPodSize' not to change"
);
require(
minimumEpochInterval ==
darknodeRegistryProxy.minimumEpochInterval(),
"Migrator: expected 'minimumEpochInterval' not to change"
);
require(
deregistrationInterval ==
darknodeRegistryProxy.deregistrationInterval(),
"Migrator: expected 'deregistrationInterval' not to change"
);
require(
ren == darknodeRegistryProxy.ren(),
"Migrator: expected 'ren' not to change"
);
require(
store == darknodeRegistryProxy.store(),
"Migrator: expected 'store' not to change"
);
require(
darknodePayment == darknodeRegistryProxy.darknodePayment(),
"Migrator: expected 'darknodePayment' not to change"
);
darknodeRegistryProxy.updateSlasher(IDarknodeSlasher(0x0));
}
function recover(
address _darknodeID,
address _bondRecipient,
bytes calldata _signature
) external onlyOwner {
return
DarknodeRegistryLogicV2(address(darknodeRegistryProxy)).recover(
_darknodeID,
_bondRecipient,
_signature
);
}
function returnDNR() public onlyOwner {
darknodeRegistryProxy._directTransferOwnership(
previousDarknodeRegistryOwner
);
}
function returnProxyAdmin() public onlyOwner {
renProxyAdmin.transferOwnership(previousAdminOwner);
}
}
pragma solidity 0.5.17;
import "@openzeppelin/contracts-ethereum-package/contracts/ownership/Ownable.sol";
import "@openzeppelin/upgrades/contracts/Initializable.sol";
/**
* @title Claimable
* @dev Extension for the Ownable contract, where the ownership needs to be claimed.
* This allows the new owner to accept the transfer.
*/
contract Claimable is Initializable, Ownable {
address public pendingOwner;
function initialize(address _nextOwner) public initializer {
Ownable.initialize(_nextOwner);
}
modifier onlyPendingOwner() {
require(
_msgSender() == pendingOwner,
"Claimable: caller is not the pending owner"
);
_;
}
function transferOwnership(address newOwner) public onlyOwner {
require(
newOwner != owner() && newOwner != pendingOwner,
"Claimable: invalid new owner"
);
pendingOwner = newOwner;
}
// Allow skipping two-step transfer if the recipient is known to be a valid
// owner, for use in smart-contracts only.
function _directTransferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
function claimOwnership() public onlyPendingOwner {
_transferOwnership(pendingOwner);
delete pendingOwner;
}
}
pragma solidity 0.5.17;
import "@openzeppelin/upgrades/contracts/upgradeability/ProxyAdmin.sol";
/**
* @title RenProxyAdmin
* @dev Proxies restrict the proxy's owner from calling functions from the
* delegate contract logic. The ProxyAdmin contract allows single account to be
* the governance address of both the proxy and the delegate contract logic.
*/
/* solium-disable-next-line no-empty-blocks */
contract RenProxyAdmin is ProxyAdmin {
}
pragma solidity 0.5.17;
import "@openzeppelin/contracts-ethereum-package/contracts/ownership/Ownable.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC20/ERC20Detailed.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC20/ERC20Pausable.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC20/ERC20Burnable.sol";
contract RenToken is Ownable, ERC20Detailed, ERC20Pausable, ERC20Burnable {
string private constant _name = "REN";
string private constant _symbol = "REN";
uint8 private constant _decimals = 18;
uint256 public constant INITIAL_SUPPLY =
1000000000 * 10**uint256(_decimals);
/// @notice The RenToken Constructor.
constructor() public {
ERC20Pausable.initialize(msg.sender);
ERC20Detailed.initialize(_name, _symbol, _decimals);
Ownable.initialize(msg.sender);
_mint(msg.sender, INITIAL_SUPPLY);
}
function transferTokens(address beneficiary, uint256 amount)
public
onlyOwner
returns (bool)
{
// Note: The deployed version has no revert reason
/* solium-disable-next-line error-reason */
require(amount > 0);
_transfer(msg.sender, beneficiary, amount);
emit Transfer(msg.sender, beneficiary, amount);
return true;
}
}
pragma solidity 0.5.17;
import "@openzeppelin/contracts-ethereum-package/contracts/ownership/Ownable.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/upgrades/contracts/Initializable.sol";
import "../Governance/Claimable.sol";
contract CanReclaimTokens is Claimable {
using SafeERC20 for ERC20;
mapping(address => bool) private recoverableTokensBlacklist;
function initialize(address _nextOwner) public initializer {
Claimable.initialize(_nextOwner);
}
function blacklistRecoverableToken(address _token) public onlyOwner {
recoverableTokensBlacklist[_token] = true;
}
/// @notice Allow the owner of the contract to recover funds accidentally
/// sent to the contract. To withdraw ETH, the token should be set to `0x0`.
function recoverTokens(address _token) external onlyOwner {
require(
!recoverableTokensBlacklist[_token],
"CanReclaimTokens: token is not recoverable"
);
if (_token == address(0x0)) {
msg.sender.transfer(address(this).balance);
} else {
ERC20(_token).safeTransfer(
msg.sender,
ERC20(_token).balanceOf(address(this))
);
}
}
}
pragma solidity 0.5.17;
/**
* @notice LinkedList is a library for a circular double linked list.
*/
library LinkedList {
/*
* @notice A permanent NULL node (0x0) in the circular double linked list.
* NULL.next is the head, and NULL.previous is the tail.
*/
address public constant NULL = address(0);
/**
* @notice A node points to the node before it, and the node after it. If
* node.previous = NULL, then the node is the head of the list. If
* node.next = NULL, then the node is the tail of the list.
*/
struct Node {
bool inList;
address previous;
address next;
}
/**
* @notice LinkedList uses a mapping from address to nodes. Each address
* uniquely identifies a node, and in this way they are used like pointers.
*/
struct List {
mapping(address => Node) list;
uint256 length;
}
/**
* @notice Insert a new node before an existing node.
*
* @param self The list being used.
* @param target The existing node in the list.
* @param newNode The next node to insert before the target.
*/
function insertBefore(
List storage self,
address target,
address newNode
) internal {
require(newNode != address(0), "LinkedList: invalid address");
require(!isInList(self, newNode), "LinkedList: already in list");
require(
isInList(self, target) || target == NULL,
"LinkedList: not in list"
);
// It is expected that this value is sometimes NULL.
address prev = self.list[target].previous;
self.list[newNode].next = target;
self.list[newNode].previous = prev;
self.list[target].previous = newNode;
self.list[prev].next = newNode;
self.list[newNode].inList = true;
self.length += 1;
}
/**
* @notice Insert a new node after an existing node.
*
* @param self The list being used.
* @param target The existing node in the list.
* @param newNode The next node to insert after the target.
*/
function insertAfter(
List storage self,
address target,
address newNode
) internal {
require(newNode != address(0), "LinkedList: invalid address");
require(!isInList(self, newNode), "LinkedList: already in list");
require(
isInList(self, target) || target == NULL,
"LinkedList: not in list"
);
// It is expected that this value is sometimes NULL.
address n = self.list[target].next;
self.list[newNode].previous = target;
self.list[newNode].next = n;
self.list[target].next = newNode;
self.list[n].previous = newNode;
self.list[newNode].inList = true;
self.length += 1;
}
/**
* @notice Remove a node from the list, and fix the previous and next
* pointers that are pointing to the removed node. Removing anode that is not
* in the list will do nothing.
*
* @param self The list being using.
* @param node The node in the list to be removed.
*/
function remove(List storage self, address node) internal {
require(isInList(self, node), "LinkedList: not in list");
address p = self.list[node].previous;
address n = self.list[node].next;
self.list[p].next = n;
self.list[n].previous = p;
// Deleting the node should set this value to false, but we set it here for
// explicitness.
self.list[node].inList = false;
delete self.list[node];
self.length -= 1;
}
/**
* @notice Insert a node at the beginning of the list.
*
* @param self The list being used.
* @param node The node to insert at the beginning of the list.
*/
function prepend(List storage self, address node) internal {
// isInList(node) is checked in insertBefore
insertBefore(self, begin(self), node);
}
/**
* @notice Insert a node at the end of the list.
*
* @param self The list being used.
* @param node The node to insert at the end of the list.
*/
function append(List storage self, address node) internal {
// isInList(node) is checked in insertBefore
insertAfter(self, end(self), node);
}
function swap(
List storage self,
address left,
address right
) internal {
// isInList(left) and isInList(right) are checked in remove
address previousRight = self.list[right].previous;
remove(self, right);
insertAfter(self, left, right);
remove(self, left);
insertAfter(self, previousRight, left);
}
function isInList(List storage self, address node)
internal
view
returns (bool)
{
return self.list[node].inList;
}
/**
* @notice Get the node at the beginning of a double linked list.
*
* @param self The list being used.
*
* @return A address identifying the node at the beginning of the double
* linked list.
*/
function begin(List storage self) internal view returns (address) {
return self.list[NULL].next;
}
/**
* @notice Get the node at the end of a double linked list.
*
* @param self The list being used.
*
* @return A address identifying the node at the end of the double linked
* list.
*/
function end(List storage self) internal view returns (address) {
return self.list[NULL].previous;
}
function next(List storage self, address node)
internal
view
returns (address)
{
require(isInList(self, node), "LinkedList: not in list");
return self.list[node].next;
}
function previous(List storage self, address node)
internal
view
returns (address)
{
require(isInList(self, node), "LinkedList: not in list");
return self.list[node].previous;
}
function elements(
List storage self,
address _start,
uint256 _count
) internal view returns (address[] memory) {
require(_count > 0, "LinkedList: invalid count");
require(
isInList(self, _start) || _start == address(0),
"LinkedList: not in list"
);
address[] memory elems = new address[](_count);
// Begin with the first node in the list
uint256 n = 0;
address nextItem = _start;
if (nextItem == address(0)) {
nextItem = begin(self);
}
while (n < _count) {
if (nextItem == address(0)) {
break;
}
elems[n] = nextItem;
nextItem = next(self, nextItem);
n += 1;
}
return elems;
}
} | @notice Restrict a function to refundable darknodes. | modifier onlyRefundable(address _darknodeID) {
require(
isRefundable(_darknodeID),
"DarknodeRegistry: must be deregistered for at least one epoch"
);
_;
}
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./partial_match/56/0x166efCE6778689521C21eA31bBc6f40F930370A3/sources/TokenTimelock.sol | 02/01/2023 12:00:00 AM
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./partial_match/1/0x695264D984A5E45C2d89f261C8668d6C1F7D214c/sources/IporProtocolRouter.sol | @notice Gets the AssetManagement configuration for the given asset. @param asset The address of the asset. @return AssetManagementConfiguration The AssetManagement configuration for the given asset. @notice Gets balance of the AmmTreasury contract in the AssetManagement. @dev This includes assets transferred to AssetManagement. @param asset The address of the asset. @return uint256 The total balance for the specified account, represented in 18 decimals. File: lib/ipor-protocol/contracts/interfaces/types/IporTypes.sol @title Struct used across various interfaces in IPOR Protocol. | library IporTypes {
function getAssetManagementConfiguration(address asset) external view returns (AssetManagementConfiguration memory);
function balanceOfAmmTreasuryInAssetManagement(address asset) external view returns (uint256);
}
pragma solidity 0.8.20;
enum SwapState {
INACTIVE,
ACTIVE
}
enum SwapTenor {
DAYS_28,
DAYS_60,
DAYS_90
}
struct AccruedIpor {
uint256 indexValue;
uint256 ibtPrice;
}
struct AmmBalancesMemory {
uint256 totalCollateralPayFixed;
uint256 totalCollateralReceiveFixed;
uint256 liquidityPool;
uint256 vault;
}
struct AmmBalancesForOpenSwapMemory {
uint256 totalCollateralPayFixed;
uint256 totalNotionalPayFixed;
uint256 totalCollateralReceiveFixed;
uint256 totalNotionalReceiveFixed;
uint256 liquidityPool;
}
struct SpreadInputs {
address asset;
uint256 swapNotional;
uint256 demandSpreadFactor;
int256 baseSpreadPerLeg;
uint256 totalCollateralPayFixed;
uint256 totalCollateralReceiveFixed;
uint256 liquidityPoolBalance;
uint256 iporIndexValue;
uint256 fixedRateCapPerLeg;
}
}
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pragma solidity ^0.5.0;
// Everyone who deposits funds is issued time tokens.
// 1 CHAR token is equivalent to 1 DAI for 1 block and represents your voting power
// There are three phases - voting, deposit and donate
// In the voting phase CHAR holders vote on the address they would like to receive funds from the next deposit phase.
// In the deposit phases people can depositnpm
// Each epoch (e.g. 1000 blocks)
import 'openzeppelin-solidity/contracts/token/ERC20/ERC20Mintable.sol';
import 'openzeppelin-solidity/contracts/token/ERC20/ERC20Detailed.sol';
import './IDeFiDonate.sol';
contract GovernanceToken is ERC20Mintable, ERC20Detailed {
IDeFiDonate public deFiDonate;
constructor (string memory _name, string memory _symbol, uint8 _decimals) public
ERC20Detailed(_name, _symbol, _decimals)
{
deFiDonate = IDeFiDonate(msg.sender);
}
// Used when voting with this token
function burn(address _account, uint256 _amount) external onlyMinter {
_burn(_account, _amount);
}
// Add on any accrued interest when calculating balances
// NB - this breaks totalSupply (e.g. sum over all addresses of balanceOf != totalSupply)
function balanceOf(address _account) public view returns (uint256) {
return super.balanceOf(_account).add(deFiDonate.accrued(_account));
}
function blockNumber() public view returns (uint256) {
return block.number;
}
function blockTime() public view returns (uint256) {
return block.timestamp;
}
function transfer(address _recipient, uint256 _amount) public returns (bool) {
// To make sure the transfer doesn't fail due to insufficient funds make sure we add
// any accrued governance tokens before trying to transfer
deFiDonate.update(msg.sender);
super.transfer(_recipient, _amount);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool) {
deFiDonate.update(msg.sender);
super.approve(_spender, _value);
return true;
}
function transferFrom(address _sender, address _recipient, uint256 _amount) public returns (bool) {
deFiDonate.update(_sender);
super.transferFrom(_sender, _recipient, _amount);
return true;
}
}
| To make sure the transfer doesn't fail due to insufficient funds make sure we add any accrued governance tokens before trying to transfer | function transfer(address _recipient, uint256 _amount) public returns (bool) {
deFiDonate.update(msg.sender);
super.transfer(_recipient, _amount);
return true;
}
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pragma solidity ^0.4.21;
contract Owned {
/// 'owner' is the only address that can call a function with
/// this modifier
address public owner;
address internal newOwner;
///@notice The constructor assigns the message sender to be 'owner'
function Owned() public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
event updateOwner(address _oldOwner, address _newOwner);
///change the owner
function changeOwner(address _newOwner) public onlyOwner returns(bool) {
require(owner != _newOwner);
newOwner = _newOwner;
return true;
}
/// accept the ownership
function acceptNewOwner() public returns(bool) {
require(msg.sender == newOwner);
emit updateOwner(owner, newOwner);
owner = newOwner;
return true;
}
}
// Safe maths, borrowed from OpenZeppelin
library SafeMath {
function mul(uint a, uint b) internal pure returns (uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint a, uint b) internal pure returns (uint) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint c = a / b;
return c;
}
function sub(uint a, uint b) internal pure returns (uint) {
assert(b <= a);
return a - b;
}
function add(uint a, uint b) internal pure returns (uint) {
uint c = a + b;
assert(c >= a);
return c;
}
}
contract ERC20Token {
/* This is a slight change to the ERC20 base standard.
function totalSupply() constant returns (uint256 supply);
is replaced with:
uint256 public totalSupply;
This automatically creates a getter function for the totalSupply.
This is moved to the base contract since public getter functions are not
currently recognised as an implementation of the matching abstract
function by the compiler.
*/
/// total amount of tokens
uint256 public totalSupply;
/// user tokens
mapping (address => uint256) public balances;
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) constant public returns (uint256 balance);
/// @notice send `_value` token to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transfer(address _to, uint256 _value) public returns (bool success);
/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
/// @notice `msg.sender` approves `_spender` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of tokens to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) public returns (bool success);
/// @param _owner The address of the account owning tokens
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens allowed to spent
function allowance(address _owner, address _spender) constant public returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract Controlled is Owned, ERC20Token {
using SafeMath for uint;
uint256 public releaseStartTime;
uint256 oneMonth = 3600 * 24 * 30;
// Flag that determines if the token is transferable or not
bool public emergencyStop = false;
struct userToken {
uint256 UST;
uint256 addrLockType;
}
mapping (address => userToken) public userReleaseToken;
modifier canTransfer {
require(emergencyStop == false);
_;
}
modifier releaseTokenValid(address _user, uint256 _time, uint256 _value) {
uint256 _lockTypeIndex = userReleaseToken[_user].addrLockType;
if(_lockTypeIndex != 0) {
require (balances[_user].sub(_value) >= userReleaseToken[_user].UST.sub(calcReleaseToken(_user, _time, _lockTypeIndex)));
}
_;
}
function canTransferUST(bool _bool) public onlyOwner{
emergencyStop = _bool;
}
/// @notice get `_user` transferable token amount
/// @param _user The user's address
/// @param _time The present time
/// @param _lockTypeIndex The user's investment lock type
/// @return Return the amount of user's transferable token
function calcReleaseToken(address _user, uint256 _time, uint256 _lockTypeIndex) internal view returns (uint256) {
uint256 _timeDifference = _time.sub(releaseStartTime);
uint256 _whichPeriod = getPeriod(_lockTypeIndex, _timeDifference);
if(_lockTypeIndex == 1) {
return (percent(userReleaseToken[_user].UST, 25) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(25)));
}
if(_lockTypeIndex == 2) {
return (percent(userReleaseToken[_user].UST, 25) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(25)));
}
if(_lockTypeIndex == 3) {
return (percent(userReleaseToken[_user].UST, 10) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(15)));
}
revert();
}
/// @notice get time period for the given '_lockTypeIndex'
/// @param _lockTypeIndex The user's investment locktype index
/// @param _timeDifference The passed time since releaseStartTime to now
/// @return Return the time period
function getPeriod(uint256 _lockTypeIndex, uint256 _timeDifference) internal view returns (uint256) {
if(_lockTypeIndex == 1) { //The lock for the usechain coreTeamSupply
uint256 _period1 = (_timeDifference.div(oneMonth)).div(12);
if(_period1 >= 3){
_period1 = 3;
}
return _period1;
}
if(_lockTypeIndex == 2) { //The lock for medium investment
uint256 _period2 = _timeDifference.div(oneMonth);
if(_period2 >= 3){
_period2 = 3;
}
return _period2;
}
if(_lockTypeIndex == 3) { //The lock for massive investment
uint256 _period3 = _timeDifference.div(oneMonth);
if(_period3 >= 6){
_period3 = 6;
}
return _period3;
}
revert();
}
function percent(uint _token, uint _percentage) internal pure returns (uint) {
return _percentage.mul(_token).div(100);
}
}
contract standardToken is ERC20Token, Controlled {
mapping (address => mapping (address => uint256)) public allowances;
/// @param _owner The address that's balance is being requested
/// @return The balance of `_owner` at the current block
function balanceOf(address _owner) constant public returns (uint256) {
return balances[_owner];
}
/// @notice Send `_value` tokens to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of tokens to be transferred
/// @return Whether the transfer was successful or not
function transfer(
address _to,
uint256 _value)
public
canTransfer
releaseTokenValid(msg.sender, now, _value)
returns (bool)
{
require (balances[msg.sender] >= _value); // Throw if sender has insufficient balance
require (balances[_to] + _value >= balances[_to]); // Throw if owerflow detected
balances[msg.sender] -= _value; // Deduct senders balance
balances[_to] += _value; // Add recivers balance
emit Transfer(msg.sender, _to, _value); // Raise Transfer event
return true;
}
/// @notice `msg.sender` approves `_spender` to spend `_value` tokens on
/// its behalf. This is a modified version of the ERC20 approve function
/// to be a little bit safer
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of tokens to be approved for transfer
/// @return True if the approval was successful
function approve(address _spender, uint256 _value) public returns (bool success) {
allowances[msg.sender][_spender] = _value; // Set allowance
emit Approval(msg.sender, _spender, _value); // Raise Approval event
return true;
}
/// @notice `msg.sender` approves `_spender` to send `_value` tokens on
/// its behalf, and then a function is triggered in the contract that is
/// being approved, `_spender`. This allows users to use their tokens to
/// interact with contracts in one function call instead of two
/// @param _spender The address of the contract able to transfer the tokens
/// @param _value The amount of tokens to be approved for transfer
/// @return True if the function call was successful
function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
approve(_spender, _value); // Set approval to contract for _value
//receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
//it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
if(!_spender.call(bytes4(bytes32(keccak256("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) {
revert();
}
return true;
}
/// @notice Send `_value` tokens to `_to` from `_from` on the condition it
/// is approved by `_from`
/// @param _from The address holding the tokens being transferred
/// @param _to The address of the recipient
/// @param _value The amount of tokens to be transferred
/// @return True if the transfer was successful
function transferFrom(address _from, address _to, uint256 _value) public canTransfer releaseTokenValid(msg.sender, now, _value) returns (bool success) {
require (balances[_from] >= _value); // Throw if sender does not have enough balance
require (balances[_to] + _value >= balances[_to]); // Throw if overflow detected
require (_value <= allowances[_from][msg.sender]); // Throw if you do not have allowance
balances[_from] -= _value; // Deduct senders balance
balances[_to] += _value; // Add recipient balance
allowances[_from][msg.sender] -= _value; // Deduct allowance for this address
emit Transfer(_from, _to, _value); // Raise Transfer event
return true;
}
/// @dev This function makes it easy to read the `allowances[]` map
/// @param _owner The address of the account that owns the token
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens of _owner that _spender is allowed to spend
function allowance(address _owner, address _spender) constant public returns (uint256) {
return allowances[_owner][_spender];
}
}
contract UST is Owned, standardToken {
string constant public name = "UseChainToken";
string constant public symbol = "UST";
uint constant public decimals = 18;
uint256 public totalSupply = 0;
uint256 constant public topTotalSupply = 2 * 10**10 * 10**decimals;
uint public forSaleSupply = percent(topTotalSupply, 45);
uint public marketingPartnerSupply = percent(topTotalSupply, 5);
uint public coreTeamSupply = percent(topTotalSupply, 15);
uint public technicalCommunitySupply = percent(topTotalSupply, 15);
uint public communitySupply = percent(topTotalSupply, 20);
uint public softCap = percent(topTotalSupply, 30);
function () public {
revert();
}
/// @dev Owner can change the releaseStartTime when needs
/// @param _time The releaseStartTime, UTC timezone
function setRealseTime(uint256 _time) public onlyOwner {
releaseStartTime = _time;
}
/// @dev This owner allocate token for private sale
/// @param _owners The address of the account that owns the token
/// @param _values The amount of tokens
/// @param _addrLockType The locktype for different investment type
function allocateToken(address[] _owners, uint256[] _values, uint256[] _addrLockType) public onlyOwner {
require ((_owners.length == _values.length) && ( _values.length == _addrLockType.length));
for(uint i = 0; i < _owners.length ; i++){
uint256 value = _values[i] * 10 ** decimals;
totalSupply = totalSupply.add(value);
balances[_owners[i]] = balances[_owners[i]].add(value); // Set minted coins to target
emit Transfer(0x0, _owners[i], value);
userReleaseToken[_owners[i]].UST = userReleaseToken[_owners[i]].UST.add(value);
userReleaseToken[_owners[i]].addrLockType = _addrLockType[i];
}
}
/// @dev This owner allocate token for candy airdrop
/// @param _owners The address of the account that owns the token
/// @param _values The amount of tokens
function allocateCandyToken(address[] _owners, uint256[] _values) public onlyOwner {
for(uint i = 0; i < _owners.length ; i++){
uint256 value = _values[i] * 10 ** decimals;
totalSupply = totalSupply.add(value);
balances[_owners[i]] = balances[_owners[i]].add(value);
emit Transfer(0x0, _owners[i], value);
}
}
} | Flag that determines if the token is transferable or not | contract Controlled is Owned, ERC20Token {
using SafeMath for uint;
uint256 public releaseStartTime;
uint256 oneMonth = 3600 * 24 * 30;
bool public emergencyStop = false;
}
struct userToken {
uint256 UST;
uint256 addrLockType;
}
mapping (address => userToken) public userReleaseToken;
modifier canTransfer {
require(emergencyStop == false);
_;
}
modifier releaseTokenValid(address _user, uint256 _time, uint256 _value) {
uint256 _lockTypeIndex = userReleaseToken[_user].addrLockType;
if(_lockTypeIndex != 0) {
require (balances[_user].sub(_value) >= userReleaseToken[_user].UST.sub(calcReleaseToken(_user, _time, _lockTypeIndex)));
}
_;
}
modifier releaseTokenValid(address _user, uint256 _time, uint256 _value) {
uint256 _lockTypeIndex = userReleaseToken[_user].addrLockType;
if(_lockTypeIndex != 0) {
require (balances[_user].sub(_value) >= userReleaseToken[_user].UST.sub(calcReleaseToken(_user, _time, _lockTypeIndex)));
}
_;
}
function canTransferUST(bool _bool) public onlyOwner{
emergencyStop = _bool;
}
function calcReleaseToken(address _user, uint256 _time, uint256 _lockTypeIndex) internal view returns (uint256) {
uint256 _timeDifference = _time.sub(releaseStartTime);
uint256 _whichPeriod = getPeriod(_lockTypeIndex, _timeDifference);
if(_lockTypeIndex == 1) {
return (percent(userReleaseToken[_user].UST, 25) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(25)));
}
if(_lockTypeIndex == 2) {
return (percent(userReleaseToken[_user].UST, 25) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(25)));
}
if(_lockTypeIndex == 3) {
return (percent(userReleaseToken[_user].UST, 10) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(15)));
}
revert();
}
function calcReleaseToken(address _user, uint256 _time, uint256 _lockTypeIndex) internal view returns (uint256) {
uint256 _timeDifference = _time.sub(releaseStartTime);
uint256 _whichPeriod = getPeriod(_lockTypeIndex, _timeDifference);
if(_lockTypeIndex == 1) {
return (percent(userReleaseToken[_user].UST, 25) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(25)));
}
if(_lockTypeIndex == 2) {
return (percent(userReleaseToken[_user].UST, 25) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(25)));
}
if(_lockTypeIndex == 3) {
return (percent(userReleaseToken[_user].UST, 10) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(15)));
}
revert();
}
function calcReleaseToken(address _user, uint256 _time, uint256 _lockTypeIndex) internal view returns (uint256) {
uint256 _timeDifference = _time.sub(releaseStartTime);
uint256 _whichPeriod = getPeriod(_lockTypeIndex, _timeDifference);
if(_lockTypeIndex == 1) {
return (percent(userReleaseToken[_user].UST, 25) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(25)));
}
if(_lockTypeIndex == 2) {
return (percent(userReleaseToken[_user].UST, 25) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(25)));
}
if(_lockTypeIndex == 3) {
return (percent(userReleaseToken[_user].UST, 10) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(15)));
}
revert();
}
function calcReleaseToken(address _user, uint256 _time, uint256 _lockTypeIndex) internal view returns (uint256) {
uint256 _timeDifference = _time.sub(releaseStartTime);
uint256 _whichPeriod = getPeriod(_lockTypeIndex, _timeDifference);
if(_lockTypeIndex == 1) {
return (percent(userReleaseToken[_user].UST, 25) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(25)));
}
if(_lockTypeIndex == 2) {
return (percent(userReleaseToken[_user].UST, 25) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(25)));
}
if(_lockTypeIndex == 3) {
return (percent(userReleaseToken[_user].UST, 10) + percent(userReleaseToken[_user].UST, _whichPeriod.mul(15)));
}
revert();
}
function getPeriod(uint256 _lockTypeIndex, uint256 _timeDifference) internal view returns (uint256) {
uint256 _period1 = (_timeDifference.div(oneMonth)).div(12);
if(_period1 >= 3){
_period1 = 3;
}
return _period1;
}
uint256 _period2 = _timeDifference.div(oneMonth);
function getPeriod(uint256 _lockTypeIndex, uint256 _timeDifference) internal view returns (uint256) {
uint256 _period1 = (_timeDifference.div(oneMonth)).div(12);
if(_period1 >= 3){
_period1 = 3;
}
return _period1;
}
uint256 _period2 = _timeDifference.div(oneMonth);
if(_period2 >= 3){
_period2 = 3;
}
return _period2;
}
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./partial_match/1/0xBFcc973A3662c91cd2C28F575Ff201927479b1D8/sources/contracts/Fund.sol | * @notice Updates Grant Recommendation and emits a `GrantUpdated` event. @param grantId UUID representing this grant @param description The address of the Owner. @param value The value of the grant in base units. @param recipient The address of the recieving organization's contract./ | function updateGrant(
string calldata grantId,
string calldata description,
uint256 value,
address recipient
)
public
onlyAddressOrAdminOrRole(
manager,
fundFactoryContract.endaomentAdmin(),
IEndaomentAdmin.Role.REVIEWER
)
{
require(!isEqual(grantId, ""), "Fund: Must provide a grantId");
require(!isEqual(description, ""), "Fund: Must provide a description");
EndaomentAdmin endaomentAdmin = EndaomentAdmin(fundFactoryContract.endaomentAdmin());
require(
checkRecipient(recipient, endaomentAdmin.getRoleAddress(IEndaomentAdmin.Role.ORG_FACTORY)) ==
true,
"Fund: Recipient contract was not created by the OrgFactory and is not allowed."
);
require(pendingGrants[grantId].recipient != address(0), "Fund: Grant does not exist.");
require(!pendingGrants[grantId].complete, "Fund: Grant is already finalized.");
Grant memory replacementGrant = Grant({
description: description,
value: value,
recipient: recipient,
complete: false
});
pendingGrants[grantId] = replacementGrant;
emit GrantUpdated(grantId, replacementGrant);
}
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// SPDX-License-Identifier: MIT
pragma solidity ^0.7.3;
import '@openzeppelin/contracts/math/SafeMath.sol';
import './interfaces/IAmesoToken.sol';
import './interfaces/ITreasury.sol';
import 'hardhat/console.sol';
contract Ameso {
using SafeMath for uint256;
modifier onlyTreasury() {
require(msg.sender == address(treasury));
_;
}
modifier onlyEmployer() {
require(msg.sender == employer, "Call must come from employer contract");
_;
}
modifier onlyReviewer() {
require(msg.sender == reviewer, "Call must come from reviewer contract");
_;
}
modifier onlyContractor() {
require(msg.sender == contractor, "Call must come from contractor contract");
_;
}
// -- State --
mapping (address => bool) employers;
// The ipfs hash of the job is the key
mapping (string => Job) public jobs;
uint256 public jobCount;
// fee that employer must pay to list job
// TO DO : per employee or whole job listing?
uint256 public baseFee = 1e18;
uint256 public maxContractors = 1000000;
uint256 public minContractors = 1;
uint256 public contractorPercentage = 75;
// minimum delay before the job can enroll contractors
// assume 15s block times
uint256 public minEnrollDelay = 240;
// Contract containing actions related to employers
address public employer;
// Contract containing actions related to reviewers
address public reviewer;
// Contract containing actions related to reviewers
address public contractor;
ITreasury public treasury;
IAmesoToken public ams;
struct Job {
// Unique id for each job
string ipfsID;
// Creator of the job listing
address employer;
// Fee paid at the time of job creation
uint256 fee;
// Tip paid at the time of job creation
uint256 tip;
// Max contractors per job
uint256 maxContractors;
// Min contractors per job
uint256 minContractors;
// The block when the job listing will open
uint256 startBlock;
// The block when the job listing will close
uint256 endBlock;
// Canceled job
bool canceled;
// Cancellation Block
uint256 cancelBlock;
// Approval Count
uint256 approvalCount;
// Reviewer Count
uint256 reviewerCount;
// Contractor Count
uint256 contractorCount;
address[] contractors;
address[] reviewers;
// Contractors enrolled in the job
mapping (address => ContractorReceipt) contractorReceipts;
}
struct ContractorReceipt {
// time of contractor enrollment
uint256 enrollBlock;
// ipfs id where work is stored
string workId;
// cancellation of job
bool cancelled;
ReviewerReceipt[] reviewers;
// reviewers for the contractor's work
mapping (address => ReviewerReceipt) reviewerReceipts;
}
struct ReviewerReceipt {
// time of reviewer enrollment
uint256 enrollBlock;
// ipfs id where review work is stored
string workId;
// approval of the contractor's work
bool approval;
// cancellation of review
bool cancelled;
}
// Possible states that the Contractor may be in for a specific job
enum ContractorJobState {
Canceled,
Pending,
Completed
}
// Possible states that the job may be in
enum JobState {
Pending, // Enrollment has closed and job is about to start
Canceled,
Enrolling,
Queued,
PrematureCompletion,
Completed,
InProgress,
Paid
}
// -- Events --
// An event emitted when a job has been created
event JobListed(string cid);
// An event emitted when a job has been cancelled
event JobCanceled(string cid);
// An event emitted when a job has been paid
event Payout(string cid);
// An event emitted when a job has been paid
event PromptDelete();
// An event emitted when a contractor enrolls in a job
event Enrollment(address contractor, string cid);
constructor(address _treasury, address _ams, address _employer) {
treasury = ITreasury(_treasury);
ams = IAmesoToken(_ams);
employer = _employer;
}
/**
* @dev Change the maxContractors
*/
function setMaxContractors(uint256 _max) public onlyTreasury {
}
/**
* @dev Change the base fee
*/
function setBaseFee(uint256 _baseFee) public onlyTreasury {
require(_baseFee > 0, "Ameso::setBaseFee: fee has to be greater than 0");
baseFee = _baseFee;
}
/**
* @dev Review calls this function to approve/disapprove job done by contractor
*/
function reviewJob(
string memory _ipfsID,
bool _approve
) public
onlyReviewer
{
// Add caller to mapping of reviewers
// Caller cannot review a job multiple times
}
function enrollJob(string memory _cid, address contractor) public onlyContractor {
// most checks done on Contractor contract
Job storage job = jobs[_cid];
job.contractorCount++;
// create receipt for enrollment
require(job.contractorReceipts[contractor].enrollBlock == 0, "Ameso::enrollJob: contractor already enrolled in job");
ContractorReceipt storage newReceipt = job.contractorReceipts[contractor];
newReceipt.enrollBlock = block.number;
newReceipt.cancelled = false;
emit Enrollment(contractor, _cid);
}
function leaveJob(string memory _cid, address contractor) public onlyContractor {
// most checks done on Contractor contract
Job storage job = jobs[_cid];
require(job.contractorReceipts[contractor].enrollBlock > 0, "Ameso::leaveJob: contractor is not part of job");
ContractorReceipt storage receipt = job.contractorReceipts[contractor];
}
/**
* @dev Get the current state of the job
* @param _ipfsID The ipfs hash
*/
function jobState(string memory _ipfsID) public view returns (JobState){
require(bytes(_ipfsID).length > 0, 'Ameso::jobState: ipfs ID does not exist');
Job storage job = jobs[_ipfsID];
if (job.canceled && job.cancelBlock < job.startBlock) {
return JobState.Canceled;
} else if (job.canceled && job.cancelBlock >= job.startBlock) {
return JobState.PrematureCompletion;
} else if (block.number <= job.startBlock && job.contractorCount < job.maxContractors) {
return JobState.Enrolling;
} else if (block.number <= job.startBlock) {
return JobState.Pending;
}
}
/**
* @dev Checks if job exists
*/
function jobExists(string memory _ipfsID) public view returns (bool) {
require(bytes(_ipfsID).length > 0, "Ameso::jobExists: no ipfs ID provided");
if(bytes(jobs[_ipfsID].ipfsID).length > 0) {
return true;
}
return false;
}
/**
* @dev
* @param _ipfsID Unique ID that points to storage in ipfs
* @param _employer Address of the employer
* @param _minContractors Minimum number of contractors
* @param _maxContractors Maximum number of contractors
* @param _tip Optional tip paid to the contractor(s)
*/
function createJob(
string memory _ipfsID,
address _employer,
uint256 _minContractors,
uint256 _maxContractors,
uint256 _extraEnrollDelay,
uint256 _jobLength,
uint256 _tip
) public
onlyEmployer
{
// all other checks handled by the employer hub
// keep track of payments in treasury
treasury.payListing(_ipfsID, _employer, baseFee, _tip);
uint256 delay = SafeMath.add(_extraEnrollDelay, minEnrollDelay);
uint256 startBlock = SafeMath.add(block.number, delay);
uint256 endBlock = SafeMath.add(startBlock, _jobLength);
jobCount++;
Job storage newJob = jobs[_ipfsID];
newJob.ipfsID = _ipfsID;
newJob.employer = _employer;
newJob.minContractors = _minContractors;
newJob.maxContractors = _maxContractors;
newJob.startBlock = startBlock;
newJob.endBlock = endBlock;
newJob.canceled = false;
emit JobListed(_ipfsID);
}
/**
* @dev
*/
function cancelJob(
string memory _ipfsID,
address _employer
) public
onlyEmployer
{
require(jobState(_ipfsID) == JobState.Pending || jobState(_ipfsID) == JobState.Enrolling, "Ameso::cancelJob: Job must be pending or enrolling");
Job storage selectedJob = jobs[_ipfsID];
selectedJob.cancelBlock = block.number;
selectedJob.canceled = true;
}
/**
* @dev Returns number of approved work for a given job
*/
function getApproved(string memory _ipfsID) public view returns (uint256) {
Job storage job = jobs[_ipfsID];
return job.approvalCount;
}
/**
* @dev
*/
function payout(string memory _ipfsID) public {
require(jobState(_ipfsID) == JobState.Completed || jobState(_ipfsID) == JobState.PrematureCompletion, "Ameso::payout: Can only be paid when job is completed");
Job storage job = jobs[_ipfsID];
uint256 contractorPool = (job.fee + job.tip) * contractorPercentage/100;
uint256 reviewerPool = (job.fee + job.tip) * (1 - contractorPercentage/100);
uint256 individualAmt = contractorPool / job.approvalCount;
uint256 individualReviewerAmt = reviewerPool / job.reviewerCount;
for (uint256 i = 0; i < job.approvalCount; i++) {
address to = job.contractors[i];
treasury.payout(to, individualAmt);
}
for (uint256 i = 0; i < job.reviewerCount; i++) {
address to = job.reviewers[i];
treasury.payout(to, individualReviewerAmt);
}
emit Payout(_ipfsID);
}
}
| * @dev Review calls this function to approve/disapprove job done by contractor/ Add caller to mapping of reviewers Caller cannot review a job multiple times | function reviewJob(
string memory _ipfsID,
bool _approve
) public
onlyReviewer
{
}
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./partial_match/1/0x2E2BD1FDaBE3450c97b6Bd0C168C8639d6728341/sources/RugStubs.sol | * @dev Override primary sale receiver/ | function changePrimarySaleReceiver(address newPrimarySaleReceiver)
external
{
if (!hasRole(DEFAULT_ADMIN_ROLE, msg.sender)) revert UnauthorisedUser();
if (newPrimarySaleReceiver == address(0)) revert ZeroAddress();
_primarySaleReceiver = newPrimarySaleReceiver;
emit NewPrimarySaleReceiver(_primarySaleReceiver);
}
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// SPDX-License-Identifier: MIT
pragma solidity >=0.4.4 <0.7.0;
pragma experimental ABIEncoderV2;
import "./ERC20.sol";
contract loteria {
// Instancia del contrato Token
ERC20Basic private token;
// Direcciones
address public owner;
address public contrato;
// Numero de tokens a crear
uint tokens_creados = 10000;
// Evento de compra de Tokens
event ComprandoTokens(uint, address);
constructor() public {
token = new ERC20Basic(tokens_creados);
owner = msg.sender;
contrato = address(this);
}
// --------------------------------- TOKEN --------------------------------- //
// Establecer el precio de los tokens en ethers
function PrecioToken(uint _numTokens) internal pure returns(uint){
return _numTokens*(1 ether);
}
// Generar mas Tokens por la Loteria
function GenerarToken(uint _numTokens) public Unicamente(msg.sender){
token.increaseTotalSupply(_numTokens);
}
// Modificador para hacer funciones solamente accesibles por el owner del contrato
modifier Unicamente(address _direccion) {
require(_direccion == owner, "No tienes permisos para ejecutar esta funcion.");
_;
}
// Comprar Tokens para comprar boletos/tickets para la loteria
function CompraTokens(uint _numTokens) public payable {
// Calcular el coste de los tokens
uint coste = PrecioToken(_numTokens);
// Se requiere que el valor de ethers pagados sea equivalente al coste
require(msg.value >= coste, "Compra menos Tokens o paga con mas Ethers.");
// Diferencia a pagar
uint returnValue = msg.value - coste;
// Trasferir la diferencia
msg.sender.transfer(returnValue);
// Obtener el balance de Tokens del contrato
uint Balance = TokensDisponibles();
// Filtro para evaluar los tokens a comprar con los tokens disponibles
require(_numTokens <= Balance, "Compra un numero de Tokens adecuado.");
// Transferencia de Tokens al comprador
token.transfer(msg.sender, _numTokens);
// Emitir el evento de compra Tokens
emit ComprandoTokens(_numTokens, msg.sender);
}
// Balance de tokens en el contrato de loteria
function TokensDisponibles() public view returns(uint) {
return token.balanceOf(contrato);
}
// Obtener el balance de tokens acumulados en el Bote
function Bote() public view returns(uint) {
return token.balanceOf(owner);
}
// Cuantos Tokens tiene alguien
function MisTokens() public view returns(uint) {
return token.balanceOf(msg.sender);
}
// --------------------------------- LOTERIA --------------------------------- //
// Precio del boleto en Tokens
uint public PrecioBoleto = 5;
// Relacion entre la persona que compra los boletos y los numeros de los boletos
mapping(address => uint[]) idPersona_boletos;
// Relacion necesaria para identificar al ganador
mapping(uint => address) ADN_boleto;
// Numero aleatorio
uint randNonce = 0;
// Boletos generados
uint[] boletos_comprados;
// Eventos
event boleto_comprado(uint, address); // Evento cuando se compra un boleto
event boleto_ganador(uint); // Evento del ganador
event tokens_devueltos(uint, address); // Evento tokens devueltos
// Funcion para comprar boletos de loteria
function ComprarBoleto(uint _boletos) public {
// Precio total de los boletos a comprar
uint precio_total = _boletos*PrecioBoleto;
// Filtrado de los tokens a pagar
require(precio_total <= MisTokens(), "Necesitas comprar mas tokens.");
// Transferencia de tokens al owner -> bote/premio
token.transferLoteria(msg.sender, owner, precio_total);
// Obtencion de los numeros de los boletos de forma aleatoria
for(uint i = 0; i < _boletos; i++) {
uint random = uint(keccak256(abi.encodePacked(now, msg.sender, randNonce))) % 10000;
randNonce++;
// Almacenamos los datos de los boletos
idPersona_boletos[msg.sender].push(random);
// Numero de boleto comprado
boletos_comprados.push(random);
// Asignacion del ADN del boleto para tener un ganador
ADN_boleto[random] = msg.sender;
// Emision del evento
emit boleto_comprado(random, msg.sender);
}
}
// Visualizar el numero de boletos de una persona
function TusBoletos() public view returns(uint[] memory) {
return idPersona_boletos[msg.sender];
}
// Funcion para generar un ganador y ingresarle los Tokens
function GenerarGanador() public Unicamente(msg.sender) {
// Debe haber boletos comprados para generar un ganador
require(boletos_comprados.length > 0, "No hay boletos comprados");
// Declaracion de la longitud del array
uint longitud = boletos_comprados.length;
// Aleatoriamente elijo un numero entre 0 - Longitud
uint posicion_array = uint(uint(keccak256(abi.encodePacked(now))) % longitud);
// Seleccion del numero aleatorio mediante la posicion del array aleatoria
uint eleccion = boletos_comprados[posicion_array];
// Emision del evento del ganador
emit boleto_ganador(eleccion);
// Recuperar la direccion del ganador
address direccion_ganador = ADN_boleto[eleccion];
// Enviarle los tokens del premio al ganador
token.transferLoteria(msg.sender, direccion_ganador, Bote());
}
// Devolucion de los tokens
function DevolverTokens(uint _numTokens) public payable {
// El numero de tokens a devolver debe ser mayor a 0
require(_numTokens > 0, "Necesitas devolver un numero positivo de tokens.");
// El usuario/cliente debe tener los tokens que desea devolver
require(_numTokens <= MisTokens(), "No tienes los tokens que deseas devolver");
// DEVOLUCION:
// 1. El cliente devuelva los tokens
// 2. La loteria paga los tokens devueltos en ethers
token.transferLoteria(msg.sender, address(this), _numTokens);
msg.sender.transfer(PrecioToken(_numTokens));
// Emision del evento
emit tokens_devueltos(_numTokens, msg.sender);
}
}
| Obtener el balance de tokens acumulados en el Bote | function Bote() public view returns(uint) {
return token.balanceOf(owner);
}
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] |
// SPDX-License-Identifier: GPL-3.0
/// @title The Nouns DAO auction house
/*********************************
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*********************************/
// LICENSE
// NounsAuctionHouse.sol is a modified version of Zora's AuctionHouse.sol:
// https://github.com/ourzora/auction-house/blob/54a12ec1a6cf562e49f0a4917990474b11350a2d/contracts/AuctionHouse.sol
//
// AuctionHouse.sol source code Copyright Zora licensed under the GPL-3.0 license.
// With modifications by Nounders DAO.
pragma solidity ^0.8.6;
import {PausableUpgradeable} from "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol";
import {ReentrancyGuardUpgradeable} from "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import {OwnableUpgradeable} from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import "./AuctionHouseStorage.sol";
import {IWETH} from "./interfaces/IWETH.sol";
import {IAuctionHouse} from "./interfaces/IAuctionHouse.sol";
import {ITreasury} from "./interfaces/ITreasury.sol";
contract AuctionHouse is
Initializable,
UUPSUpgradeable,
PausableUpgradeable,
ReentrancyGuardUpgradeable,
OwnableUpgradeable,
AuctionHouseStorage,
IAuctionHouse
{
/**
* @notice Initialize the auction house and base contracts,
* populate configuration values, and pause the contract.
* @dev This function can only be called once.
*/
function initialize(
ISquidDAONFT _squidDAONFT,
address _weth,
uint256 _timeBuffer,
uint256 _reservePrice,
uint8 _minBidIncrementPercentage,
uint256 _duration
) external initializer {
__Pausable_init();
__ReentrancyGuard_init();
__Ownable_init();
_pause();
squidDAONFT = _squidDAONFT;
weth = _weth;
timeBuffer = _timeBuffer;
reservePrice = _reservePrice;
minBidIncrementPercentage = _minBidIncrementPercentage;
duration = _duration;
}
/**
* @notice Settle the current auction, mint a new Noun, and put it up for auction.
*/
function settleCurrentAndCreateNewAuction()
external
override
nonReentrant
whenNotPaused
{
_settleAuction();
_createAuction();
}
/**
* @notice Settle the current auction.
* @dev This function can only be called when the contract is paused.
*/
function settleAuction() external override whenPaused nonReentrant {
_settleAuction();
}
/**
* @notice Create a bid for a Noun, with a given amount.
* @dev This contract only accepts payment in ETH.
*/
function createBid(uint256 squidDAONFTId, uint256 amount)
external
payable
override
nonReentrant
{
IAuctionHouse.Auction memory _auction = auction;
require(ohm != address(0), "ohm token address not set");
require(
_auction.squidDAONFTId == squidDAONFTId,
"Noun not up for auction"
);
require(block.timestamp < _auction.endTime, "Auction expired");
bool isOHMAuction = _isOHMAuction(_auction.squidDAONFTId);
if (!isOHMAuction) {
amount = msg.value;
} else {
require(
msg.value == 0,
"ohm auctions only accept OHM, pls do not send ether"
);
}
require(amount >= reservePrice, "Must send at least reservePrice");
require(
amount >=
_auction.amount +
((_auction.amount * minBidIncrementPercentage) / 100),
"Must send more than last bid by minBidIncrementPercentage amount"
);
if (isOHMAuction) {
IERC20(ohm).transferFrom(msg.sender, address(this), amount);
}
address payable lastBidder = _auction.bidder;
uint256 lastBidAmount = _auction.amount;
// Refund the last bidder, if applicable
if (lastBidder != address(0)) {
if (isOHMAuction) {
IERC20(ohm).transfer(lastBidder, lastBidAmount);
} else {
_safeTransferETHWithFallback(lastBidder, lastBidAmount);
}
}
auction.amount = amount;
auction.bidder = payable(msg.sender);
// Extend the auction if the bid was received within `timeBuffer` of the auction end time
bool extended = _auction.endTime - block.timestamp < timeBuffer;
if (extended) {
auction.endTime = _auction.endTime = block.timestamp + timeBuffer;
}
emit AuctionBid(_auction.squidDAONFTId, msg.sender, amount, extended);
if (extended) {
emit AuctionExtended(_auction.squidDAONFTId, _auction.endTime);
}
}
/**
* @notice Pause the auction house.
* @dev This function can only be called by the owner when the
* contract is unpaused. While no new auctions can be started when paused,
* anyone can settle an ongoing auction.
*/
function pause() external override onlyOwner {
_pause();
}
/**
* @notice Unpause the auction house.
* @dev This function can only be called by the owner when the
* contract is paused. If required, this function will start a new auction.
*/
function unpause() external override onlyOwner {
_unpause();
if (auction.startTime == 0 || auction.settled) {
_createAuction();
}
}
/**
* @notice Set the auction time buffer.
* @dev Only callable by the owner.
*/
function setTimeBuffer(uint256 _timeBuffer) external override onlyOwner {
timeBuffer = _timeBuffer;
emit AuctionTimeBufferUpdated(_timeBuffer);
}
/**
* @notice Set the auction reserve price.
* @dev Only callable by the owner.
*/
function setReservePrice(uint256 _reservePrice)
external
override
onlyOwner
{
reservePrice = _reservePrice;
emit AuctionReservePriceUpdated(_reservePrice);
}
/**
* @notice Set the auction duration.
* @dev Only callable by the owner.
*/
function setDuration(uint256 _duration) external override onlyOwner {
duration = _duration;
emit AuctionDurationUpdated(_duration);
}
/**
* @notice Set the auction minimum bid increment percentage.
* @dev Only callable by the owner.
*/
function setMinBidIncrementPercentage(uint8 _minBidIncrementPercentage)
external
override
onlyOwner
{
minBidIncrementPercentage = _minBidIncrementPercentage;
emit AuctionMinBidIncrementPercentageUpdated(
_minBidIncrementPercentage
);
}
function setOhm(address _ohm) external onlyOwner {
ohm = _ohm;
}
/**
* @notice Get auction duration
* @dev 24 auctions = 1st day, 12 auctions = 2nd day, 6 auctions = 3rd day, 3 auctions = 4th day, 2 auction = 5th day,
* then use duration (initialised at 24 hours per)
*/
function _getAuctionDuration(uint256 squidDAONFTId)
internal
view
returns (uint256)
{
if (squidDAONFTId <= 23) {
return 1 hours;
} else if (squidDAONFTId <= 35) {
return 2 hours;
} else if (squidDAONFTId <= 41) {
return 4 hours;
} else if (squidDAONFTId <= 44) {
return 8 hours;
} else if (squidDAONFTId <= 46) {
return 12 hours;
} else {
return duration;
}
}
/**
* @notice Create an auction.
* @dev Store the auction details in the `auction` state variable and emit an AuctionCreated event.
* If the mint reverts, the minter was updated without pausing this contract first. To remedy this,
* catch the revert and pause this contract.
*/
function _createAuction() internal {
try squidDAONFT.mint(address(this)) returns (uint256 squidDAONFTId) {
uint256 startTime = block.timestamp;
uint256 endTime = startTime + _getAuctionDuration(squidDAONFTId);
auction = Auction({
squidDAONFTId: squidDAONFTId,
amount: 0,
startTime: startTime,
endTime: endTime,
bidder: payable(0),
settled: false
});
emit AuctionCreated(squidDAONFTId, startTime, endTime);
} catch Error(string memory err) {
_pause();
}
}
function _isOHMAuction(uint256 tokenId) internal pure returns (bool) {
return tokenId >= 83 && tokenId <= 94;
}
/**
* @notice Settle an auction, finalizing the bid and paying out to the owner.
* @dev If there are no bids, the Noun is burned.
*/
function _settleAuction() internal {
IAuctionHouse.Auction memory _auction = auction;
require(ohm != address(0), "ohm token address not set");
require(_auction.startTime != 0, "Auction hasn't begun");
require(!_auction.settled, "Auction has already been settled");
require(
block.timestamp >= _auction.endTime,
"Auction hasn't completed"
);
auction.settled = true;
if (_auction.bidder == address(0)) {
squidDAONFT.burn(_auction.squidDAONFTId);
} else {
squidDAONFT.transferFrom(
address(this),
_auction.bidder,
_auction.squidDAONFTId
);
}
if (_auction.amount > 0) {
if (_isOHMAuction(_auction.squidDAONFTId)) {
IERC20(ohm).transfer(owner(), _auction.amount);
} else {
_safeTransferETHWithFallback(owner(), _auction.amount);
}
}
emit AuctionSettled(
_auction.squidDAONFTId,
_auction.bidder,
_auction.amount
);
}
/**
* @notice Transfer ETH. If the ETH transfer fails, wrap the ETH and try send it as WETH.
*/
function _safeTransferETHWithFallback(address to, uint256 amount) internal {
if (!_safeTransferETH(to, amount)) {
IWETH(weth).deposit{value: amount}();
IERC20(weth).transfer(to, amount);
}
}
/**
* @notice Transfer ETH and return the success status.
* @dev This function only forwards 30,000 gas to the callee.
*/
function _safeTransferETH(address to, uint256 value)
internal
returns (bool)
{
(bool success, ) = to.call{value: value, gas: 30_000}(new bytes(0));
return success;
}
/**
* @dev _authorizeUpgrade is used by UUPSUpgradeable to determine if it's allowed to upgrade a proxy implementation.
// added onlyOwner modifier for access control
* @param newImplementation The new implementation
*
* Ref: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/proxy/utils/UUPSUpgradeable.sol
*/
function _authorizeUpgrade(address newImplementation)
internal
override
onlyOwner
{}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
function __Pausable_init() internal initializer {
__Context_init_unchained();
__Pausable_init_unchained();
}
function __Pausable_init_unchained() internal initializer {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuardUpgradeable is Initializable {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
function __ReentrancyGuard_init() internal initializer {
__ReentrancyGuard_init_unchained();
}
function __ReentrancyGuard_init_unchained() internal initializer {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC1967/ERC1967UpgradeUpgradeable.sol";
import "./Initializable.sol";
/**
* @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
* {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
*
* A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
* reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
* `UUPSUpgradeable` with a custom implementation of upgrades.
*
* The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
*
* _Available since v4.1._
*/
abstract contract UUPSUpgradeable is Initializable, ERC1967UpgradeUpgradeable {
function __UUPSUpgradeable_init() internal initializer {
__ERC1967Upgrade_init_unchained();
__UUPSUpgradeable_init_unchained();
}
function __UUPSUpgradeable_init_unchained() internal initializer {
}
/// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
address private immutable __self = address(this);
/**
* @dev Check that the execution is being performed through a delegatecall call and that the execution context is
* a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
* for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
* function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
* fail.
*/
modifier onlyProxy() {
require(address(this) != __self, "Function must be called through delegatecall");
require(_getImplementation() == __self, "Function must be called through active proxy");
_;
}
/**
* @dev Upgrade the implementation of the proxy to `newImplementation`.
*
* Calls {_authorizeUpgrade}.
*
* Emits an {Upgraded} event.
*/
function upgradeTo(address newImplementation) external virtual onlyProxy {
_authorizeUpgrade(newImplementation);
_upgradeToAndCallSecure(newImplementation, new bytes(0), false);
}
/**
* @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
* encoded in `data`.
*
* Calls {_authorizeUpgrade}.
*
* Emits an {Upgraded} event.
*/
function upgradeToAndCall(address newImplementation, bytes memory data) external payable virtual onlyProxy {
_authorizeUpgrade(newImplementation);
_upgradeToAndCallSecure(newImplementation, data, true);
}
/**
* @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
* {upgradeTo} and {upgradeToAndCall}.
*
* Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
*
* ```solidity
* function _authorizeUpgrade(address) internal override onlyOwner {}
* ```
*/
function _authorizeUpgrade(address newImplementation) internal virtual;
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import {ISquidDAONFT} from "./interfaces/ISquidDAONFT.sol";
import {IAuctionHouse} from "./interfaces/IAuctionHouse.sol";
contract AuctionHouseStorage {
// The ERC721 token contract
ISquidDAONFT public squidDAONFT;
// The address of the WETH contract
address public weth;
// The minimum amount of time left in an auction after a new bid is created
uint256 public timeBuffer;
// The minimum price accepted in an auction
uint256 public reservePrice;
// The minimum percentage difference between the last bid amount and the current bid
uint8 public minBidIncrementPercentage;
// The duration of a single auction
uint256 public duration;
// The active auction
IAuctionHouse.Auction public auction;
address public ohm;
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.6;
interface IWETH {
function deposit() external payable;
function withdraw(uint256 wad) external;
function transfer(address to, uint256 value) external returns (bool);
}
// SPDX-License-Identifier: GPL-3.0
/// @title Interface for Noun Auction Houses
/*********************************
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░█████████░░█████████░░░ *
* ░░░░░░██░░░████░░██░░░████░░░ *
* ░░██████░░░████████░░░████░░░ *
* ░░██░░██░░░████░░██░░░████░░░ *
* ░░██░░██░░░████░░██░░░████░░░ *
* ░░░░░░█████████░░█████████░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
* ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ *
*********************************/
pragma solidity ^0.8.6;
interface IAuctionHouse {
struct Auction {
// ID for the squid DAO NFT (ERC721 token ID)
uint256 squidDAONFTId;
// The current highest bid amount
uint256 amount;
// The time that the auction started
uint256 startTime;
// The time that the auction is scheduled to end
uint256 endTime;
// The address of the current highest bid
address payable bidder;
// Whether or not the auction has been settled
bool settled;
}
event AuctionCreated(
uint256 indexed squidDAONFTId,
uint256 startTime,
uint256 endTime
);
event AuctionBid(
uint256 indexed squidDAONFTId,
address sender,
uint256 value,
bool extended
);
event AuctionExtended(uint256 indexed squidDAONFTId, uint256 endTime);
event AuctionSettled(
uint256 indexed squidDAONFTId,
address winner,
uint256 amount
);
event AuctionTimeBufferUpdated(uint256 timeBuffer);
event AuctionReservePriceUpdated(uint256 reservePrice);
event AuctionDurationUpdated(uint256 duration);
event AuctionMinBidIncrementPercentageUpdated(
uint256 minBidIncrementPercentage
);
function settleAuction() external;
function settleCurrentAndCreateNewAuction() external;
function createBid(uint256 squidDAONFTId, uint256 amount) external payable;
function pause() external;
function unpause() external;
function setTimeBuffer(uint256 timeBuffer) external;
function setReservePrice(uint256 reservePrice) external;
function setDuration(uint256 duration) external;
function setMinBidIncrementPercentage(uint8 minBidIncrementPercentage)
external;
}
interface ITreasury {
function deposit(
uint256 _amount,
address _token,
uint256 _profit
) external returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.2;
import "../beacon/IBeaconUpgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/StorageSlotUpgradeable.sol";
import "../utils/Initializable.sol";
/**
* @dev This abstract contract provides getters and event emitting update functions for
* https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
*
* _Available since v4.1._
*
* @custom:oz-upgrades-unsafe-allow delegatecall
*/
abstract contract ERC1967UpgradeUpgradeable is Initializable {
function __ERC1967Upgrade_init() internal initializer {
__ERC1967Upgrade_init_unchained();
}
function __ERC1967Upgrade_init_unchained() internal initializer {
}
// This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Emitted when the implementation is upgraded.
*/
event Upgraded(address indexed implementation);
/**
* @dev Returns the current implementation address.
*/
function _getImplementation() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 implementation slot.
*/
function _setImplementation(address newImplementation) private {
require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
}
/**
* @dev Perform implementation upgrade
*
* Emits an {Upgraded} event.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Perform implementation upgrade with additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCall(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
_upgradeTo(newImplementation);
if (data.length > 0 || forceCall) {
_functionDelegateCall(newImplementation, data);
}
}
/**
* @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCallSecure(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
address oldImplementation = _getImplementation();
// Initial upgrade and setup call
_setImplementation(newImplementation);
if (data.length > 0 || forceCall) {
_functionDelegateCall(newImplementation, data);
}
// Perform rollback test if not already in progress
StorageSlotUpgradeable.BooleanSlot storage rollbackTesting = StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT);
if (!rollbackTesting.value) {
// Trigger rollback using upgradeTo from the new implementation
rollbackTesting.value = true;
_functionDelegateCall(
newImplementation,
abi.encodeWithSignature("upgradeTo(address)", oldImplementation)
);
rollbackTesting.value = false;
// Check rollback was effective
require(oldImplementation == _getImplementation(), "ERC1967Upgrade: upgrade breaks further upgrades");
// Finally reset to the new implementation and log the upgrade
_upgradeTo(newImplementation);
}
}
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Emitted when the admin account has changed.
*/
event AdminChanged(address previousAdmin, address newAdmin);
/**
* @dev Returns the current admin.
*/
function _getAdmin() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 admin slot.
*/
function _setAdmin(address newAdmin) private {
require(newAdmin != address(0), "ERC1967: new admin is the zero address");
StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
}
/**
* @dev Changes the admin of the proxy.
*
* Emits an {AdminChanged} event.
*/
function _changeAdmin(address newAdmin) internal {
emit AdminChanged(_getAdmin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
* This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
*/
bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
/**
* @dev Emitted when the beacon is upgraded.
*/
event BeaconUpgraded(address indexed beacon);
/**
* @dev Returns the current beacon.
*/
function _getBeacon() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
}
/**
* @dev Stores a new beacon in the EIP1967 beacon slot.
*/
function _setBeacon(address newBeacon) private {
require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
require(
AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
"ERC1967: beacon implementation is not a contract"
);
StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
}
/**
* @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
* not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
*
* Emits a {BeaconUpgraded} event.
*/
function _upgradeBeaconToAndCall(
address newBeacon,
bytes memory data,
bool forceCall
) internal {
_setBeacon(newBeacon);
emit BeaconUpgraded(newBeacon);
if (data.length > 0 || forceCall) {
_functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
}
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function _functionDelegateCall(address target, bytes memory data) private returns (bytes memory) {
require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed");
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev This is the interface that {BeaconProxy} expects of its beacon.
*/
interface IBeaconUpgradeable {
/**
* @dev Must return an address that can be used as a delegate call target.
*
* {BeaconProxy} will check that this address is a contract.
*/
function implementation() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
*/
library StorageSlotUpgradeable {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
assembly {
r.slot := slot
}
}
}
// SPDX-License-Identifier: GPL-3.0
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
pragma solidity ^0.8.6;
interface ISquidDAONFT is IERC721 {
function mint(address receiver) external returns (uint256 tokenId);
function burn(uint256 tokenId) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
} | * @notice Settle an auction, finalizing the bid and paying out to the owner. @dev If there are no bids, the Noun is burned./ | function _settleAuction() internal {
IAuctionHouse.Auction memory _auction = auction;
require(ohm != address(0), "ohm token address not set");
require(_auction.startTime != 0, "Auction hasn't begun");
require(!_auction.settled, "Auction has already been settled");
require(
block.timestamp >= _auction.endTime,
"Auction hasn't completed"
);
auction.settled = true;
if (_auction.bidder == address(0)) {
squidDAONFT.burn(_auction.squidDAONFTId);
squidDAONFT.transferFrom(
address(this),
_auction.bidder,
_auction.squidDAONFTId
);
}
if (_auction.amount > 0) {
if (_isOHMAuction(_auction.squidDAONFTId)) {
IERC20(ohm).transfer(owner(), _auction.amount);
_safeTransferETHWithFallback(owner(), _auction.amount);
}
}
emit AuctionSettled(
_auction.squidDAONFTId,
_auction.bidder,
_auction.amount
);
}
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./full_match/44787/0x2D65b8a41013148C0d6386E783A587E0ba802fFC/sources/contracts/moneymarkets/moola/MoolaMarket.sol | Verify input addresses | ) external initializer {
__MoneyMarket_init(_rescuer);
require(
_provider.isContract() &&
_aToken.isContract() &&
_rewards != address(0) &&
_stablecoin.isContract(),
"MoolaMarket: An input address is not a contract"
);
provider = ILendingPoolAddressesProvider(_provider);
stablecoin = ERC20(_stablecoin);
aToken = ERC20(_aToken);
rewards = _rewards;
}
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pragma solidity ^0.8.10;
import "ds-test/test.sol";
import "../Vault/VaultFactory.sol";
import "../Ethernaut.sol";
import "./utils/vm.sol";
contract VaultTest is DSTest {
Vm vm = Vm(address(0x7109709ECfa91a80626fF3989D68f67F5b1DD12D));
Ethernaut ethernaut;
function setUp() public {
// Setup instance of the Ethernaut contract
ethernaut = new Ethernaut();
}
function testVaultHack() public {
/////////////////
// LEVEL SETUP //
/////////////////
VaultFactory vaultFactory = new VaultFactory();
ethernaut.registerLevel(vaultFactory);
vm.startPrank(tx.origin);
address levelAddress = ethernaut.createLevelInstance(vaultFactory);
Vault ethernautVault = Vault(payable(levelAddress));
//////////////////
// LEVEL ATTACK //
//////////////////
// Cheat code to load contract storage at specific slot
bytes32 password = vm.load(levelAddress, bytes32(uint256(1)));
// Log bytes stored at that memory location
emit log_bytes(abi.encodePacked(password));
// The following lines just convert from bytes32 to a string and logs it so you can see that the password we have obtained is correct
uint8 i = 0;
while(i < 32 && password[i] != 0) {
i++;
}
bytes memory bytesArray = new bytes(i);
for (i = 0; i < 32 && password[i] != 0; i++) {
bytesArray[i] = password[i];
}
emit log_string(string(bytesArray));
// Call the unlock function with the password we read from storage
ethernautVault.unlock(password);
//////////////////////
// LEVEL SUBMISSION //
//////////////////////
bool levelSuccessfullyPassed = ethernaut.submitLevelInstance(payable(levelAddress));
vm.stopPrank();
assert(levelSuccessfullyPassed);
}
} | LEVEL SETUP LEVEL ATTACK Cheat code to load contract storage at specific slot Log bytes stored at that memory location The following lines just convert from bytes32 to a string and logs it so you can see that the password we have obtained is correct | function testVaultHack() public {
VaultFactory vaultFactory = new VaultFactory();
ethernaut.registerLevel(vaultFactory);
vm.startPrank(tx.origin);
address levelAddress = ethernaut.createLevelInstance(vaultFactory);
Vault ethernautVault = Vault(payable(levelAddress));
bytes32 password = vm.load(levelAddress, bytes32(uint256(1)));
emit log_bytes(abi.encodePacked(password));
uint8 i = 0;
while(i < 32 && password[i] != 0) {
i++;
}
bytes memory bytesArray = new bytes(i);
for (i = 0; i < 32 && password[i] != 0; i++) {
bytesArray[i] = password[i];
}
emit log_string(string(bytesArray));
bool levelSuccessfullyPassed = ethernaut.submitLevelInstance(payable(levelAddress));
vm.stopPrank();
assert(levelSuccessfullyPassed);
}
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./partial_match/1/0xd3EB37fB35b6944cAF0ac591D625e8e70db433F1/sources/COCOLInu.sol | * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. This internal function is equivalent to `approve`, and can be used to e.g. set automatic allowances for certain subsystems, etc. Emits an {Approval} event. Requirements: - `owner` cannot be the zero address. - `spender` cannot be the zero address./ | function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
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/**
*Submitted for verification at Etherscan.io on 2021-03-31
*/
/**
Copyright 2020 PoolTogether Inc.
This file is part of PoolTogether.
PoolTogether is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation under version 3 of the License.
PoolTogether is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PoolTogether. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity 0.5.12;
contract GemLike {
function allowance(address, address) public returns (uint);
function approve(address, uint) public;
function transfer(address, uint) public returns (bool);
function transferFrom(address, address, uint) public returns (bool);
}
contract ValueLike {
function peek() public returns (uint, bool);
}
contract SaiTubLike {
function skr() public view returns (GemLike);
function gem() public view returns (GemLike);
function gov() public view returns (GemLike);
function sai() public view returns (GemLike);
function pep() public view returns (ValueLike);
function vox() public view returns (VoxLike);
function bid(uint) public view returns (uint);
function ink(bytes32) public view returns (uint);
function tag() public view returns (uint);
function tab(bytes32) public returns (uint);
function rap(bytes32) public returns (uint);
function draw(bytes32, uint) public;
function shut(bytes32) public;
function exit(uint) public;
function give(bytes32, address) public;
}
contract VoxLike {
function par() public returns (uint);
}
contract JoinLike {
function ilk() public returns (bytes32);
function gem() public returns (GemLike);
function dai() public returns (GemLike);
function join(address, uint) public;
function exit(address, uint) public;
}
contract VatLike {
function ilks(bytes32) public view returns (uint, uint, uint, uint, uint);
function hope(address) public;
function frob(bytes32, address, address, address, int, int) public;
}
contract ManagerLike {
function vat() public view returns (address);
function urns(uint) public view returns (address);
function open(bytes32, address) public returns (uint);
function frob(uint, int, int) public;
function give(uint, address) public;
function move(uint, address, uint) public;
}
contract OtcLike {
function getPayAmount(address, address, uint) public view returns (uint);
function buyAllAmount(address, uint, address, uint) public;
}
/**
Copyright 2020 PoolTogether Inc.
This file is part of PoolTogether.
PoolTogether is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation under version 3 of the License.
PoolTogether is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PoolTogether. If not, see <https://www.gnu.org/licenses/>.
*/
/**
Copyright 2020 PoolTogether Inc.
This file is part of PoolTogether.
PoolTogether is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation under version 3 of the License.
PoolTogether is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PoolTogether. If not, see <https://www.gnu.org/licenses/>.
*/
/**
* @dev Interface of the global ERC1820 Registry, as defined in the
* https://eips.ethereum.org/EIPS/eip-1820[EIP]. Accounts may register
* implementers for interfaces in this registry, as well as query support.
*
* Implementers may be shared by multiple accounts, and can also implement more
* than a single interface for each account. Contracts can implement interfaces
* for themselves, but externally-owned accounts (EOA) must delegate this to a
* contract.
*
* {IERC165} interfaces can also be queried via the registry.
*
* For an in-depth explanation and source code analysis, see the EIP text.
*/
interface IERC1820Registry {
/**
* @dev Sets `newManager` as the manager for `account`. A manager of an
* account is able to set interface implementers for it.
*
* By default, each account is its own manager. Passing a value of `0x0` in
* `newManager` will reset the manager to this initial state.
*
* Emits a {ManagerChanged} event.
*
* Requirements:
*
* - the caller must be the current manager for `account`.
*/
function setManager(address account, address newManager) external;
/**
* @dev Returns the manager for `account`.
*
* See {setManager}.
*/
function getManager(address account) external view returns (address);
/**
* @dev Sets the `implementer` contract as `account`'s implementer for
* `interfaceHash`.
*
* `account` being the zero address is an alias for the caller's address.
* The zero address can also be used in `implementer` to remove an old one.
*
* See {interfaceHash} to learn how these are created.
*
* Emits an {InterfaceImplementerSet} event.
*
* Requirements:
*
* - the caller must be the current manager for `account`.
* - `interfaceHash` must not be an {IERC165} interface id (i.e. it must not
* end in 28 zeroes).
* - `implementer` must implement {IERC1820Implementer} and return true when
* queried for support, unless `implementer` is the caller. See
* {IERC1820Implementer-canImplementInterfaceForAddress}.
*/
function setInterfaceImplementer(address account, bytes32 interfaceHash, address implementer) external;
/**
* @dev Returns the implementer of `interfaceHash` for `account`. If no such
* implementer is registered, returns the zero address.
*
* If `interfaceHash` is an {IERC165} interface id (i.e. it ends with 28
* zeroes), `account` will be queried for support of it.
*
* `account` being the zero address is an alias for the caller's address.
*/
function getInterfaceImplementer(address account, bytes32 interfaceHash) external view returns (address);
/**
* @dev Returns the interface hash for an `interfaceName`, as defined in the
* corresponding
* https://eips.ethereum.org/EIPS/eip-1820#interface-name[section of the EIP].
*/
function interfaceHash(string calldata interfaceName) external pure returns (bytes32);
/**
* @notice Updates the cache with whether the contract implements an ERC165 interface or not.
* @param account Address of the contract for which to update the cache.
* @param interfaceId ERC165 interface for which to update the cache.
*/
function updateERC165Cache(address account, bytes4 interfaceId) external;
/**
* @notice Checks whether a contract implements an ERC165 interface or not.
* If the result is not cached a direct lookup on the contract address is performed.
* If the result is not cached or the cached value is out-of-date, the cache MUST be updated manually by calling
* {updateERC165Cache} with the contract address.
* @param account Address of the contract to check.
* @param interfaceId ERC165 interface to check.
* @return True if `account` implements `interfaceId`, false otherwise.
*/
function implementsERC165Interface(address account, bytes4 interfaceId) external view returns (bool);
/**
* @notice Checks whether a contract implements an ERC165 interface or not without using nor updating the cache.
* @param account Address of the contract to check.
* @param interfaceId ERC165 interface to check.
* @return True if `account` implements `interfaceId`, false otherwise.
*/
function implementsERC165InterfaceNoCache(address account, bytes4 interfaceId) external view returns (bool);
event InterfaceImplementerSet(address indexed account, bytes32 indexed interfaceHash, address indexed implementer);
event ManagerChanged(address indexed account, address indexed newManager);
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @title Initializable
*
* @dev Helper contract to support initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*/
contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private initializing;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
initialized = true;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
uint256 cs;
assembly { cs := extcodesize(address) }
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*/
contract ReentrancyGuard is Initializable {
// counter to allow mutex lock with only one SSTORE operation
uint256 private _guardCounter;
function initialize() public initializer {
// The counter starts at one to prevent changing it from zero to a non-zero
// value, which is a more expensive operation.
_guardCounter = 1;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_guardCounter += 1;
uint256 localCounter = _guardCounter;
_;
require(localCounter == _guardCounter, "ReentrancyGuard: reentrant call");
}
uint256[50] private ______gap;
}
/**
* @title Roles
* @dev Library for managing addresses assigned to a Role.
*/
library Roles {
struct Role {
mapping (address => bool) bearer;
}
/**
* @dev Give an account access to this role.
*/
function add(Role storage role, address account) internal {
require(!has(role, account), "Roles: account already has role");
role.bearer[account] = true;
}
/**
* @dev Remove an account's access to this role.
*/
function remove(Role storage role, address account) internal {
require(has(role, account), "Roles: account does not have role");
role.bearer[account] = false;
}
/**
* @dev Check if an account has this role.
* @return bool
*/
function has(Role storage role, address account) internal view returns (bool) {
require(account != address(0), "Roles: account is the zero address");
return role.bearer[account];
}
}
/**
Copyright 2020 PoolTogether Inc.
This file is part of PoolTogether.
PoolTogether is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation under version 3 of the License.
PoolTogether is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PoolTogether. If not, see <https://www.gnu.org/licenses/>.
*/
contract ICErc20 {
address public underlying;
function mint(uint256 mintAmount) external returns (uint);
function redeemUnderlying(uint256 redeemAmount) external returns (uint);
function balanceOfUnderlying(address owner) external returns (uint);
function getCash() external view returns (uint);
function supplyRatePerBlock() external view returns (uint);
}
/**
Copyright 2020 PoolTogether Inc.
This file is part of PoolTogether.
PoolTogether is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation under version 3 of the License.
PoolTogether is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PoolTogether. If not, see <https://www.gnu.org/licenses/>.
*/
/**
Copyright 2020 PoolTogether Inc.
This file is part of PoolTogether.
PoolTogether is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation under version 3 of the License.
PoolTogether is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PoolTogether. If not, see <https://www.gnu.org/licenses/>.
*/
/**
* @author Brendan Asselstine
* @notice A library that uses entropy to select a random number within a bound. Compensates for modulo bias.
* @dev Thanks to https://medium.com/hownetworks/dont-waste-cycles-with-modulo-bias-35b6fdafcf94
*/
library UniformRandomNumber {
/// @notice Select a random number without modulo bias using a random seed and upper bound
/// @param _entropy The seed for randomness
/// @param _upperBound The upper bound of the desired number
/// @return A random number less than the _upperBound
function uniform(uint256 _entropy, uint256 _upperBound) internal pure returns (uint256) {
require(_upperBound > 0, "UniformRand/min-bound");
uint256 min = -_upperBound % _upperBound;
uint256 random = _entropy;
while (true) {
if (random >= min) {
break;
}
random = uint256(keccak256(abi.encodePacked(random)));
}
return random % _upperBound;
}
}
/**
* @reviewers: [@clesaege, @unknownunknown1, @ferittuncer]
* @auditors: []
* @bounties: [<14 days 10 ETH max payout>]
* @deployments: []
*/
/**
* @title SortitionSumTreeFactory
* @author Enrique Piqueras - <[email protected]>
* @dev A factory of trees that keep track of staked values for sortition.
*/
library SortitionSumTreeFactory {
/* Structs */
struct SortitionSumTree {
uint K; // The maximum number of childs per node.
// We use this to keep track of vacant positions in the tree after removing a leaf. This is for keeping the tree as balanced as possible without spending gas on moving nodes around.
uint[] stack;
uint[] nodes;
// Two-way mapping of IDs to node indexes. Note that node index 0 is reserved for the root node, and means the ID does not have a node.
mapping(bytes32 => uint) IDsToNodeIndexes;
mapping(uint => bytes32) nodeIndexesToIDs;
}
/* Storage */
struct SortitionSumTrees {
mapping(bytes32 => SortitionSumTree) sortitionSumTrees;
}
/* internal */
/**
* @dev Create a sortition sum tree at the specified key.
* @param _key The key of the new tree.
* @param _K The number of children each node in the tree should have.
*/
function createTree(SortitionSumTrees storage self, bytes32 _key, uint _K) internal {
SortitionSumTree storage tree = self.sortitionSumTrees[_key];
require(tree.K == 0, "Tree already exists.");
require(_K > 1, "K must be greater than one.");
tree.K = _K;
tree.stack.length = 0;
tree.nodes.length = 0;
tree.nodes.push(0);
}
/**
* @dev Set a value of a tree.
* @param _key The key of the tree.
* @param _value The new value.
* @param _ID The ID of the value.
* `O(log_k(n))` where
* `k` is the maximum number of childs per node in the tree,
* and `n` is the maximum number of nodes ever appended.
*/
function set(SortitionSumTrees storage self, bytes32 _key, uint _value, bytes32 _ID) internal {
SortitionSumTree storage tree = self.sortitionSumTrees[_key];
uint treeIndex = tree.IDsToNodeIndexes[_ID];
if (treeIndex == 0) { // No existing node.
if (_value != 0) { // Non zero value.
// Append.
// Add node.
if (tree.stack.length == 0) { // No vacant spots.
// Get the index and append the value.
treeIndex = tree.nodes.length;
tree.nodes.push(_value);
// Potentially append a new node and make the parent a sum node.
if (treeIndex != 1 && (treeIndex - 1) % tree.K == 0) { // Is first child.
uint parentIndex = treeIndex / tree.K;
bytes32 parentID = tree.nodeIndexesToIDs[parentIndex];
uint newIndex = treeIndex + 1;
tree.nodes.push(tree.nodes[parentIndex]);
delete tree.nodeIndexesToIDs[parentIndex];
tree.IDsToNodeIndexes[parentID] = newIndex;
tree.nodeIndexesToIDs[newIndex] = parentID;
}
} else { // Some vacant spot.
// Pop the stack and append the value.
treeIndex = tree.stack[tree.stack.length - 1];
tree.stack.length--;
tree.nodes[treeIndex] = _value;
}
// Add label.
tree.IDsToNodeIndexes[_ID] = treeIndex;
tree.nodeIndexesToIDs[treeIndex] = _ID;
updateParents(self, _key, treeIndex, true, _value);
}
} else { // Existing node.
if (_value == 0) { // Zero value.
// Remove.
// Remember value and set to 0.
uint value = tree.nodes[treeIndex];
tree.nodes[treeIndex] = 0;
// Push to stack.
tree.stack.push(treeIndex);
// Clear label.
delete tree.IDsToNodeIndexes[_ID];
delete tree.nodeIndexesToIDs[treeIndex];
updateParents(self, _key, treeIndex, false, value);
} else if (_value != tree.nodes[treeIndex]) { // New, non zero value.
// Set.
bool plusOrMinus = tree.nodes[treeIndex] <= _value;
uint plusOrMinusValue = plusOrMinus ? _value - tree.nodes[treeIndex] : tree.nodes[treeIndex] - _value;
tree.nodes[treeIndex] = _value;
updateParents(self, _key, treeIndex, plusOrMinus, plusOrMinusValue);
}
}
}
/* internal Views */
/**
* @dev Query the leaves of a tree. Note that if `startIndex == 0`, the tree is empty and the root node will be returned.
* @param _key The key of the tree to get the leaves from.
* @param _cursor The pagination cursor.
* @param _count The number of items to return.
* @return The index at which leaves start, the values of the returned leaves, and whether there are more for pagination.
* `O(n)` where
* `n` is the maximum number of nodes ever appended.
*/
function queryLeafs(
SortitionSumTrees storage self,
bytes32 _key,
uint _cursor,
uint _count
) internal view returns(uint startIndex, uint[] memory values, bool hasMore) {
SortitionSumTree storage tree = self.sortitionSumTrees[_key];
// Find the start index.
for (uint i = 0; i < tree.nodes.length; i++) {
if ((tree.K * i) + 1 >= tree.nodes.length) {
startIndex = i;
break;
}
}
// Get the values.
uint loopStartIndex = startIndex + _cursor;
values = new uint[](loopStartIndex + _count > tree.nodes.length ? tree.nodes.length - loopStartIndex : _count);
uint valuesIndex = 0;
for (uint j = loopStartIndex; j < tree.nodes.length; j++) {
if (valuesIndex < _count) {
values[valuesIndex] = tree.nodes[j];
valuesIndex++;
} else {
hasMore = true;
break;
}
}
}
/**
* @dev Draw an ID from a tree using a number. Note that this function reverts if the sum of all values in the tree is 0.
* @param _key The key of the tree.
* @param _drawnNumber The drawn number.
* @return The drawn ID.
* `O(k * log_k(n))` where
* `k` is the maximum number of childs per node in the tree,
* and `n` is the maximum number of nodes ever appended.
*/
function draw(SortitionSumTrees storage self, bytes32 _key, uint _drawnNumber) internal view returns(bytes32 ID) {
SortitionSumTree storage tree = self.sortitionSumTrees[_key];
uint treeIndex = 0;
uint currentDrawnNumber = _drawnNumber % tree.nodes[0];
while ((tree.K * treeIndex) + 1 < tree.nodes.length) // While it still has children.
for (uint i = 1; i <= tree.K; i++) { // Loop over children.
uint nodeIndex = (tree.K * treeIndex) + i;
uint nodeValue = tree.nodes[nodeIndex];
if (currentDrawnNumber >= nodeValue) currentDrawnNumber -= nodeValue; // Go to the next child.
else { // Pick this child.
treeIndex = nodeIndex;
break;
}
}
ID = tree.nodeIndexesToIDs[treeIndex];
}
/** @dev Gets a specified ID's associated value.
* @param _key The key of the tree.
* @param _ID The ID of the value.
* @return The associated value.
*/
function stakeOf(SortitionSumTrees storage self, bytes32 _key, bytes32 _ID) internal view returns(uint value) {
SortitionSumTree storage tree = self.sortitionSumTrees[_key];
uint treeIndex = tree.IDsToNodeIndexes[_ID];
if (treeIndex == 0) value = 0;
else value = tree.nodes[treeIndex];
}
function total(SortitionSumTrees storage self, bytes32 _key) internal view returns (uint) {
SortitionSumTree storage tree = self.sortitionSumTrees[_key];
if (tree.nodes.length == 0) {
return 0;
} else {
return tree.nodes[0];
}
}
/* Private */
/**
* @dev Update all the parents of a node.
* @param _key The key of the tree to update.
* @param _treeIndex The index of the node to start from.
* @param _plusOrMinus Wether to add (true) or substract (false).
* @param _value The value to add or substract.
* `O(log_k(n))` where
* `k` is the maximum number of childs per node in the tree,
* and `n` is the maximum number of nodes ever appended.
*/
function updateParents(SortitionSumTrees storage self, bytes32 _key, uint _treeIndex, bool _plusOrMinus, uint _value) private {
SortitionSumTree storage tree = self.sortitionSumTrees[_key];
uint parentIndex = _treeIndex;
while (parentIndex != 0) {
parentIndex = (parentIndex - 1) / tree.K;
tree.nodes[parentIndex] = _plusOrMinus ? tree.nodes[parentIndex] + _value : tree.nodes[parentIndex] - _value;
}
}
}
/**
* @author Brendan Asselstine
* @notice Tracks committed and open balances for addresses. Affords selection of an address by indexing all committed balances.
*
* Balances are tracked in Draws. There is always one open Draw. Deposits are always added to the open Draw.
* When a new draw is opened, the previous opened draw is committed.
*
* The committed balance for an address is the total of their balances for committed Draws.
* An address's open balance is their balance in the open Draw.
*/
library DrawManager {
using SortitionSumTreeFactory for SortitionSumTreeFactory.SortitionSumTrees;
using SafeMath for uint256;
/**
* The ID to use for the selection tree.
*/
bytes32 public constant TREE_OF_DRAWS = "TreeOfDraws";
uint8 public constant MAX_BRANCHES_PER_NODE = 10;
/**
* Stores information for all draws.
*/
struct State {
/**
* Each Draw stores it's address balances in a sortitionSumTree. Draw trees are indexed using the Draw index.
* There is one root sortitionSumTree that stores all of the draw totals. The root tree is indexed using the constant TREE_OF_DRAWS.
*/
SortitionSumTreeFactory.SortitionSumTrees sortitionSumTrees;
/**
* Stores the consolidated draw index that an address deposited to.
*/
mapping(address => uint256) consolidatedDrawIndices;
/**
* Stores the last Draw index that an address deposited to.
*/
mapping(address => uint256) latestDrawIndices;
/**
* Stores a mapping of Draw index => Draw total
*/
mapping(uint256 => uint256) __deprecated__drawTotals;
/**
* The current open Draw index
*/
uint256 openDrawIndex;
/**
* The total of committed balances
*/
uint256 __deprecated__committedSupply;
}
/**
* @notice Opens the next Draw and commits the previous open Draw (if any).
* @param self The drawState this library is attached to
* @return The index of the new open Draw
*/
function openNextDraw(State storage self) public returns (uint256) {
if (self.openDrawIndex == 0) {
// If there is no previous draw, we must initialize
self.sortitionSumTrees.createTree(TREE_OF_DRAWS, MAX_BRANCHES_PER_NODE);
} else {
// else add current draw to sortition sum trees
bytes32 drawId = bytes32(self.openDrawIndex);
uint256 drawTotal = openSupply(self);
self.sortitionSumTrees.set(TREE_OF_DRAWS, drawTotal, drawId);
}
// now create a new draw
uint256 drawIndex = self.openDrawIndex.add(1);
self.sortitionSumTrees.createTree(bytes32(drawIndex), MAX_BRANCHES_PER_NODE);
self.openDrawIndex = drawIndex;
return drawIndex;
}
/**
* @notice Deposits the given amount into the current open draw by the given user.
* @param self The DrawManager state
* @param _addr The address to deposit for
* @param _amount The amount to deposit
*/
function deposit(State storage self, address _addr, uint256 _amount) public requireOpenDraw(self) onlyNonZero(_addr) {
bytes32 userId = bytes32(uint256(_addr));
uint256 openDrawIndex = self.openDrawIndex;
// update the current draw
uint256 currentAmount = self.sortitionSumTrees.stakeOf(bytes32(openDrawIndex), userId);
currentAmount = currentAmount.add(_amount);
drawSet(self, openDrawIndex, currentAmount, _addr);
uint256 consolidatedDrawIndex = self.consolidatedDrawIndices[_addr];
uint256 latestDrawIndex = self.latestDrawIndices[_addr];
// if this is the user's first draw, set it
if (consolidatedDrawIndex == 0) {
self.consolidatedDrawIndices[_addr] = openDrawIndex;
// otherwise, if the consolidated draw is not this draw
} else if (consolidatedDrawIndex != openDrawIndex) {
// if a second draw does not exist
if (latestDrawIndex == 0) {
// set the second draw to the current draw
self.latestDrawIndices[_addr] = openDrawIndex;
// otherwise if a second draw exists but is not the current one
} else if (latestDrawIndex != openDrawIndex) {
// merge it into the first draw, and update the second draw index to this one
uint256 consolidatedAmount = self.sortitionSumTrees.stakeOf(bytes32(consolidatedDrawIndex), userId);
uint256 latestAmount = self.sortitionSumTrees.stakeOf(bytes32(latestDrawIndex), userId);
drawSet(self, consolidatedDrawIndex, consolidatedAmount.add(latestAmount), _addr);
drawSet(self, latestDrawIndex, 0, _addr);
self.latestDrawIndices[_addr] = openDrawIndex;
}
}
}
/**
* @notice Deposits into a user's committed balance, thereby bypassing the open draw.
* @param self The DrawManager state
* @param _addr The address of the user for whom to deposit
* @param _amount The amount to deposit
*/
function depositCommitted(State storage self, address _addr, uint256 _amount) public requireCommittedDraw(self) onlyNonZero(_addr) {
bytes32 userId = bytes32(uint256(_addr));
uint256 consolidatedDrawIndex = self.consolidatedDrawIndices[_addr];
// if they have a committed balance
if (consolidatedDrawIndex != 0 && consolidatedDrawIndex != self.openDrawIndex) {
uint256 consolidatedAmount = self.sortitionSumTrees.stakeOf(bytes32(consolidatedDrawIndex), userId);
drawSet(self, consolidatedDrawIndex, consolidatedAmount.add(_amount), _addr);
} else { // they must not have any committed balance
self.latestDrawIndices[_addr] = consolidatedDrawIndex;
self.consolidatedDrawIndices[_addr] = self.openDrawIndex.sub(1);
drawSet(self, self.consolidatedDrawIndices[_addr], _amount, _addr);
}
}
/**
* @notice Withdraws a user's committed and open draws.
* @param self The DrawManager state
* @param _addr The address whose balance to withdraw
*/
function withdraw(State storage self, address _addr) public requireOpenDraw(self) onlyNonZero(_addr) {
uint256 consolidatedDrawIndex = self.consolidatedDrawIndices[_addr];
uint256 latestDrawIndex = self.latestDrawIndices[_addr];
if (consolidatedDrawIndex != 0) {
drawSet(self, consolidatedDrawIndex, 0, _addr);
delete self.consolidatedDrawIndices[_addr];
}
if (latestDrawIndex != 0) {
drawSet(self, latestDrawIndex, 0, _addr);
delete self.latestDrawIndices[_addr];
}
}
/**
* @notice Withdraw's from a user's open balance
* @param self The DrawManager state
* @param _addr The user to withdrawn from
* @param _amount The amount to withdraw
*/
function withdrawOpen(State storage self, address _addr, uint256 _amount) public requireOpenDraw(self) onlyNonZero(_addr) {
bytes32 userId = bytes32(uint256(_addr));
uint256 openTotal = self.sortitionSumTrees.stakeOf(bytes32(self.openDrawIndex), userId);
require(_amount <= openTotal, "DrawMan/exceeds-open");
uint256 remaining = openTotal.sub(_amount);
drawSet(self, self.openDrawIndex, remaining, _addr);
}
/**
* @notice Withdraw's from a user's committed balance. Fails if the user attempts to take more than available.
* @param self The DrawManager state
* @param _addr The user to withdraw from
* @param _amount The amount to withdraw.
*/
function withdrawCommitted(State storage self, address _addr, uint256 _amount) public requireCommittedDraw(self) onlyNonZero(_addr) {
bytes32 userId = bytes32(uint256(_addr));
uint256 consolidatedDrawIndex = self.consolidatedDrawIndices[_addr];
uint256 latestDrawIndex = self.latestDrawIndices[_addr];
uint256 consolidatedAmount = 0;
uint256 latestAmount = 0;
uint256 total = 0;
if (latestDrawIndex != 0 && latestDrawIndex != self.openDrawIndex) {
latestAmount = self.sortitionSumTrees.stakeOf(bytes32(latestDrawIndex), userId);
total = total.add(latestAmount);
}
if (consolidatedDrawIndex != 0 && consolidatedDrawIndex != self.openDrawIndex) {
consolidatedAmount = self.sortitionSumTrees.stakeOf(bytes32(consolidatedDrawIndex), userId);
total = total.add(consolidatedAmount);
}
// If the total is greater than zero, then consolidated *must* have the committed balance
// However, if the total is zero then the consolidated balance may be the open balance
if (total == 0) {
return;
}
require(_amount <= total, "Pool/exceed");
uint256 remaining = total.sub(_amount);
// if there was a second amount that needs to be updated
if (remaining > consolidatedAmount) {
uint256 secondRemaining = remaining.sub(consolidatedAmount);
drawSet(self, latestDrawIndex, secondRemaining, _addr);
} else if (latestAmount > 0) { // else delete the second amount if it exists
delete self.latestDrawIndices[_addr];
drawSet(self, latestDrawIndex, 0, _addr);
}
// if the consolidated amount needs to be destroyed
if (remaining == 0) {
delete self.consolidatedDrawIndices[_addr];
drawSet(self, consolidatedDrawIndex, 0, _addr);
} else if (remaining < consolidatedAmount) {
drawSet(self, consolidatedDrawIndex, remaining, _addr);
}
}
/**
* @notice Returns the total balance for an address, including committed balances and the open balance.
*/
function balanceOf(State storage drawState, address _addr) public view returns (uint256) {
return committedBalanceOf(drawState, _addr).add(openBalanceOf(drawState, _addr));
}
/**
* @notice Returns the total committed balance for an address.
* @param self The DrawManager state
* @param _addr The address whose committed balance should be returned
* @return The total committed balance
*/
function committedBalanceOf(State storage self, address _addr) public view returns (uint256) {
uint256 balance = 0;
uint256 consolidatedDrawIndex = self.consolidatedDrawIndices[_addr];
uint256 latestDrawIndex = self.latestDrawIndices[_addr];
if (consolidatedDrawIndex != 0 && consolidatedDrawIndex != self.openDrawIndex) {
balance = self.sortitionSumTrees.stakeOf(bytes32(consolidatedDrawIndex), bytes32(uint256(_addr)));
}
if (latestDrawIndex != 0 && latestDrawIndex != self.openDrawIndex) {
balance = balance.add(self.sortitionSumTrees.stakeOf(bytes32(latestDrawIndex), bytes32(uint256(_addr))));
}
return balance;
}
/**
* @notice Returns the open balance for an address
* @param self The DrawManager state
* @param _addr The address whose open balance should be returned
* @return The open balance
*/
function openBalanceOf(State storage self, address _addr) public view returns (uint256) {
if (self.openDrawIndex == 0) {
return 0;
} else {
return self.sortitionSumTrees.stakeOf(bytes32(self.openDrawIndex), bytes32(uint256(_addr)));
}
}
/**
* @notice Returns the open Draw balance for the DrawManager
* @param self The DrawManager state
* @return The open draw total balance
*/
function openSupply(State storage self) public view returns (uint256) {
return self.sortitionSumTrees.total(bytes32(self.openDrawIndex));
}
/**
* @notice Returns the committed balance for the DrawManager
* @param self The DrawManager state
* @return The total committed balance
*/
function committedSupply(State storage self) public view returns (uint256) {
return self.sortitionSumTrees.total(TREE_OF_DRAWS);
}
/**
* @notice Updates the Draw balance for an address.
* @param self The DrawManager state
* @param _drawIndex The Draw index
* @param _amount The new balance
* @param _addr The address whose balance should be updated
*/
function drawSet(State storage self, uint256 _drawIndex, uint256 _amount, address _addr) internal {
bytes32 drawId = bytes32(_drawIndex);
bytes32 userId = bytes32(uint256(_addr));
uint256 oldAmount = self.sortitionSumTrees.stakeOf(drawId, userId);
if (oldAmount != _amount) {
// If the amount has changed
// Update the Draw's balance for that address
self.sortitionSumTrees.set(drawId, _amount, userId);
// if the draw is committed
if (_drawIndex != self.openDrawIndex) {
// Get the new draw total
uint256 newDrawTotal = self.sortitionSumTrees.total(drawId);
// update the draw in the committed tree
self.sortitionSumTrees.set(TREE_OF_DRAWS, newDrawTotal, drawId);
}
}
}
/**
* @notice Selects an address by indexing into the committed tokens using the passed token.
* If there is no committed supply, the zero address is returned.
* @param self The DrawManager state
* @param _token The token index to select
* @return The selected address
*/
function draw(State storage self, uint256 _token) public view returns (address) {
// If there is no one to select, just return the zero address
if (committedSupply(self) == 0) {
return address(0);
}
require(_token < committedSupply(self), "Pool/ineligible");
bytes32 drawIndex = self.sortitionSumTrees.draw(TREE_OF_DRAWS, _token);
uint256 drawSupply = self.sortitionSumTrees.total(drawIndex);
uint256 drawToken = _token % drawSupply;
return address(uint256(self.sortitionSumTrees.draw(drawIndex, drawToken)));
}
/**
* @notice Selects an address using the entropy as an index into the committed tokens
* The entropy is passed into the UniformRandomNumber library to remove modulo bias.
* @param self The DrawManager state
* @param _entropy The random entropy to use
* @return The selected address
*/
function drawWithEntropy(State storage self, bytes32 _entropy) public view returns (address) {
uint256 bound = committedSupply(self);
address selected;
if (bound == 0) {
selected = address(0);
} else {
selected = draw(self, UniformRandomNumber.uniform(uint256(_entropy), bound));
}
return selected;
}
modifier requireOpenDraw(State storage self) {
require(self.openDrawIndex > 0, "Pool/no-open");
_;
}
modifier requireCommittedDraw(State storage self) {
require(self.openDrawIndex > 1, "Pool/no-commit");
_;
}
modifier onlyNonZero(address _addr) {
require(_addr != address(0), "Pool/not-zero");
_;
}
}
/**
* @title FixidityLib
* @author Gadi Guy, Alberto Cuesta Canada
* @notice This library provides fixed point arithmetic with protection against
* overflow.
* All operations are done with int256 and the operands must have been created
* with any of the newFrom* functions, which shift the comma digits() to the
* right and check for limits.
* When using this library be sure of using maxNewFixed() as the upper limit for
* creation of fixed point numbers. Use maxFixedMul(), maxFixedDiv() and
* maxFixedAdd() if you want to be certain that those operations don't
* overflow.
*/
library FixidityLib {
/**
* @notice Number of positions that the comma is shifted to the right.
*/
function digits() public pure returns(uint8) {
return 24;
}
/**
* @notice This is 1 in the fixed point units used in this library.
* @dev Test fixed1() equals 10^digits()
* Hardcoded to 24 digits.
*/
function fixed1() public pure returns(int256) {
return 1000000000000000000000000;
}
/**
* @notice The amount of decimals lost on each multiplication operand.
* @dev Test mulPrecision() equals sqrt(fixed1)
* Hardcoded to 24 digits.
*/
function mulPrecision() public pure returns(int256) {
return 1000000000000;
}
/**
* @notice Maximum value that can be represented in an int256
* @dev Test maxInt256() equals 2^255 -1
*/
function maxInt256() public pure returns(int256) {
return 57896044618658097711785492504343953926634992332820282019728792003956564819967;
}
/**
* @notice Minimum value that can be represented in an int256
* @dev Test minInt256 equals (2^255) * (-1)
*/
function minInt256() public pure returns(int256) {
return -57896044618658097711785492504343953926634992332820282019728792003956564819968;
}
/**
* @notice Maximum value that can be converted to fixed point. Optimize for
* @dev deployment.
* Test maxNewFixed() equals maxInt256() / fixed1()
* Hardcoded to 24 digits.
*/
function maxNewFixed() public pure returns(int256) {
return 57896044618658097711785492504343953926634992332820282;
}
/**
* @notice Minimum value that can be converted to fixed point. Optimize for
* deployment.
* @dev Test minNewFixed() equals -(maxInt256()) / fixed1()
* Hardcoded to 24 digits.
*/
function minNewFixed() public pure returns(int256) {
return -57896044618658097711785492504343953926634992332820282;
}
/**
* @notice Maximum value that can be safely used as an addition operator.
* @dev Test maxFixedAdd() equals maxInt256()-1 / 2
* Test add(maxFixedAdd(),maxFixedAdd()) equals maxFixedAdd() + maxFixedAdd()
* Test add(maxFixedAdd()+1,maxFixedAdd()) throws
* Test add(-maxFixedAdd(),-maxFixedAdd()) equals -maxFixedAdd() - maxFixedAdd()
* Test add(-maxFixedAdd(),-maxFixedAdd()-1) throws
*/
function maxFixedAdd() public pure returns(int256) {
return 28948022309329048855892746252171976963317496166410141009864396001978282409983;
}
/**
* @notice Maximum negative value that can be safely in a subtraction.
* @dev Test maxFixedSub() equals minInt256() / 2
*/
function maxFixedSub() public pure returns(int256) {
return -28948022309329048855892746252171976963317496166410141009864396001978282409984;
}
/**
* @notice Maximum value that can be safely used as a multiplication operator.
* @dev Calculated as sqrt(maxInt256()*fixed1()).
* Be careful with your sqrt() implementation. I couldn't find a calculator
* that would give the exact square root of maxInt256*fixed1 so this number
* is below the real number by no more than 3*10**28. It is safe to use as
* a limit for your multiplications, although powers of two of numbers over
* this value might still work.
* Test multiply(maxFixedMul(),maxFixedMul()) equals maxFixedMul() * maxFixedMul()
* Test multiply(maxFixedMul(),maxFixedMul()+1) throws
* Test multiply(-maxFixedMul(),maxFixedMul()) equals -maxFixedMul() * maxFixedMul()
* Test multiply(-maxFixedMul(),maxFixedMul()+1) throws
* Hardcoded to 24 digits.
*/
function maxFixedMul() public pure returns(int256) {
return 240615969168004498257251713877715648331380787511296;
}
/**
* @notice Maximum value that can be safely used as a dividend.
* @dev divide(maxFixedDiv,newFixedFraction(1,fixed1())) = maxInt256().
* Test maxFixedDiv() equals maxInt256()/fixed1()
* Test divide(maxFixedDiv(),multiply(mulPrecision(),mulPrecision())) = maxFixedDiv()*(10^digits())
* Test divide(maxFixedDiv()+1,multiply(mulPrecision(),mulPrecision())) throws
* Hardcoded to 24 digits.
*/
function maxFixedDiv() public pure returns(int256) {
return 57896044618658097711785492504343953926634992332820282;
}
/**
* @notice Maximum value that can be safely used as a divisor.
* @dev Test maxFixedDivisor() equals fixed1()*fixed1() - Or 10**(digits()*2)
* Test divide(10**(digits()*2 + 1),10**(digits()*2)) = returns 10*fixed1()
* Test divide(10**(digits()*2 + 1),10**(digits()*2 + 1)) = throws
* Hardcoded to 24 digits.
*/
function maxFixedDivisor() public pure returns(int256) {
return 1000000000000000000000000000000000000000000000000;
}
/**
* @notice Converts an int256 to fixed point units, equivalent to multiplying
* by 10^digits().
* @dev Test newFixed(0) returns 0
* Test newFixed(1) returns fixed1()
* Test newFixed(maxNewFixed()) returns maxNewFixed() * fixed1()
* Test newFixed(maxNewFixed()+1) fails
*/
function newFixed(int256 x)
public
pure
returns (int256)
{
require(x <= maxNewFixed());
require(x >= minNewFixed());
return x * fixed1();
}
/**
* @notice Converts an int256 in the fixed point representation of this
* library to a non decimal. All decimal digits will be truncated.
*/
function fromFixed(int256 x)
public
pure
returns (int256)
{
return x / fixed1();
}
/**
* @notice Converts an int256 which is already in some fixed point
* representation to a different fixed precision representation.
* Both the origin and destination precisions must be 38 or less digits.
* Origin values with a precision higher than the destination precision
* will be truncated accordingly.
* @dev
* Test convertFixed(1,0,0) returns 1;
* Test convertFixed(1,1,1) returns 1;
* Test convertFixed(1,1,0) returns 0;
* Test convertFixed(1,0,1) returns 10;
* Test convertFixed(10,1,0) returns 1;
* Test convertFixed(10,0,1) returns 100;
* Test convertFixed(100,1,0) returns 10;
* Test convertFixed(100,0,1) returns 1000;
* Test convertFixed(1000,2,0) returns 10;
* Test convertFixed(1000,0,2) returns 100000;
* Test convertFixed(1000,2,1) returns 100;
* Test convertFixed(1000,1,2) returns 10000;
* Test convertFixed(maxInt256,1,0) returns maxInt256/10;
* Test convertFixed(maxInt256,0,1) throws
* Test convertFixed(maxInt256,38,0) returns maxInt256/(10**38);
* Test convertFixed(1,0,38) returns 10**38;
* Test convertFixed(maxInt256,39,0) throws
* Test convertFixed(1,0,39) throws
*/
function convertFixed(int256 x, uint8 _originDigits, uint8 _destinationDigits)
public
pure
returns (int256)
{
require(_originDigits <= 38 && _destinationDigits <= 38);
uint8 decimalDifference;
if ( _originDigits > _destinationDigits ){
decimalDifference = _originDigits - _destinationDigits;
return x/(uint128(10)**uint128(decimalDifference));
}
else if ( _originDigits < _destinationDigits ){
decimalDifference = _destinationDigits - _originDigits;
// Cast uint8 -> uint128 is safe
// Exponentiation is safe:
// _originDigits and _destinationDigits limited to 38 or less
// decimalDifference = abs(_destinationDigits - _originDigits)
// decimalDifference < 38
// 10**38 < 2**128-1
require(x <= maxInt256()/uint128(10)**uint128(decimalDifference));
require(x >= minInt256()/uint128(10)**uint128(decimalDifference));
return x*(uint128(10)**uint128(decimalDifference));
}
// _originDigits == digits())
return x;
}
/**
* @notice Converts an int256 which is already in some fixed point
* representation to that of this library. The _originDigits parameter is the
* precision of x. Values with a precision higher than FixidityLib.digits()
* will be truncated accordingly.
*/
function newFixed(int256 x, uint8 _originDigits)
public
pure
returns (int256)
{
return convertFixed(x, _originDigits, digits());
}
/**
* @notice Converts an int256 in the fixed point representation of this
* library to a different representation. The _destinationDigits parameter is the
* precision of the output x. Values with a precision below than
* FixidityLib.digits() will be truncated accordingly.
*/
function fromFixed(int256 x, uint8 _destinationDigits)
public
pure
returns (int256)
{
return convertFixed(x, digits(), _destinationDigits);
}
/**
* @notice Converts two int256 representing a fraction to fixed point units,
* equivalent to multiplying dividend and divisor by 10^digits().
* @dev
* Test newFixedFraction(maxFixedDiv()+1,1) fails
* Test newFixedFraction(1,maxFixedDiv()+1) fails
* Test newFixedFraction(1,0) fails
* Test newFixedFraction(0,1) returns 0
* Test newFixedFraction(1,1) returns fixed1()
* Test newFixedFraction(maxFixedDiv(),1) returns maxFixedDiv()*fixed1()
* Test newFixedFraction(1,fixed1()) returns 1
* Test newFixedFraction(1,fixed1()-1) returns 0
*/
function newFixedFraction(
int256 numerator,
int256 denominator
)
public
pure
returns (int256)
{
require(numerator <= maxNewFixed());
require(denominator <= maxNewFixed());
require(denominator != 0);
int256 convertedNumerator = newFixed(numerator);
int256 convertedDenominator = newFixed(denominator);
return divide(convertedNumerator, convertedDenominator);
}
/**
* @notice Returns the integer part of a fixed point number.
* @dev
* Test integer(0) returns 0
* Test integer(fixed1()) returns fixed1()
* Test integer(newFixed(maxNewFixed())) returns maxNewFixed()*fixed1()
* Test integer(-fixed1()) returns -fixed1()
* Test integer(newFixed(-maxNewFixed())) returns -maxNewFixed()*fixed1()
*/
function integer(int256 x) public pure returns (int256) {
return (x / fixed1()) * fixed1(); // Can't overflow
}
/**
* @notice Returns the fractional part of a fixed point number.
* In the case of a negative number the fractional is also negative.
* @dev
* Test fractional(0) returns 0
* Test fractional(fixed1()) returns 0
* Test fractional(fixed1()-1) returns 10^24-1
* Test fractional(-fixed1()) returns 0
* Test fractional(-fixed1()+1) returns -10^24-1
*/
function fractional(int256 x) public pure returns (int256) {
return x - (x / fixed1()) * fixed1(); // Can't overflow
}
/**
* @notice Converts to positive if negative.
* Due to int256 having one more negative number than positive numbers
* abs(minInt256) reverts.
* @dev
* Test abs(0) returns 0
* Test abs(fixed1()) returns -fixed1()
* Test abs(-fixed1()) returns fixed1()
* Test abs(newFixed(maxNewFixed())) returns maxNewFixed()*fixed1()
* Test abs(newFixed(minNewFixed())) returns -minNewFixed()*fixed1()
*/
function abs(int256 x) public pure returns (int256) {
if (x >= 0) {
return x;
} else {
int256 result = -x;
assert (result > 0);
return result;
}
}
/**
* @notice x+y. If any operator is higher than maxFixedAdd() it
* might overflow.
* In solidity maxInt256 + 1 = minInt256 and viceversa.
* @dev
* Test add(maxFixedAdd(),maxFixedAdd()) returns maxInt256()-1
* Test add(maxFixedAdd()+1,maxFixedAdd()+1) fails
* Test add(-maxFixedSub(),-maxFixedSub()) returns minInt256()
* Test add(-maxFixedSub()-1,-maxFixedSub()-1) fails
* Test add(maxInt256(),maxInt256()) fails
* Test add(minInt256(),minInt256()) fails
*/
function add(int256 x, int256 y) public pure returns (int256) {
int256 z = x + y;
if (x > 0 && y > 0) assert(z > x && z > y);
if (x < 0 && y < 0) assert(z < x && z < y);
return z;
}
/**
* @notice x-y. You can use add(x,-y) instead.
* @dev Tests covered by add(x,y)
*/
function subtract(int256 x, int256 y) public pure returns (int256) {
return add(x,-y);
}
/**
* @notice x*y. If any of the operators is higher than maxFixedMul() it
* might overflow.
* @dev
* Test multiply(0,0) returns 0
* Test multiply(maxFixedMul(),0) returns 0
* Test multiply(0,maxFixedMul()) returns 0
* Test multiply(maxFixedMul(),fixed1()) returns maxFixedMul()
* Test multiply(fixed1(),maxFixedMul()) returns maxFixedMul()
* Test all combinations of (2,-2), (2, 2.5), (2, -2.5) and (0.5, -0.5)
* Test multiply(fixed1()/mulPrecision(),fixed1()*mulPrecision())
* Test multiply(maxFixedMul()-1,maxFixedMul()) equals multiply(maxFixedMul(),maxFixedMul()-1)
* Test multiply(maxFixedMul(),maxFixedMul()) returns maxInt256() // Probably not to the last digits
* Test multiply(maxFixedMul()+1,maxFixedMul()) fails
* Test multiply(maxFixedMul(),maxFixedMul()+1) fails
*/
function multiply(int256 x, int256 y) public pure returns (int256) {
if (x == 0 || y == 0) return 0;
if (y == fixed1()) return x;
if (x == fixed1()) return y;
// Separate into integer and fractional parts
// x = x1 + x2, y = y1 + y2
int256 x1 = integer(x) / fixed1();
int256 x2 = fractional(x);
int256 y1 = integer(y) / fixed1();
int256 y2 = fractional(y);
// (x1 + x2) * (y1 + y2) = (x1 * y1) + (x1 * y2) + (x2 * y1) + (x2 * y2)
int256 x1y1 = x1 * y1;
if (x1 != 0) assert(x1y1 / x1 == y1); // Overflow x1y1
// x1y1 needs to be multiplied back by fixed1
// solium-disable-next-line mixedcase
int256 fixed_x1y1 = x1y1 * fixed1();
if (x1y1 != 0) assert(fixed_x1y1 / x1y1 == fixed1()); // Overflow x1y1 * fixed1
x1y1 = fixed_x1y1;
int256 x2y1 = x2 * y1;
if (x2 != 0) assert(x2y1 / x2 == y1); // Overflow x2y1
int256 x1y2 = x1 * y2;
if (x1 != 0) assert(x1y2 / x1 == y2); // Overflow x1y2
x2 = x2 / mulPrecision();
y2 = y2 / mulPrecision();
int256 x2y2 = x2 * y2;
if (x2 != 0) assert(x2y2 / x2 == y2); // Overflow x2y2
// result = fixed1() * x1 * y1 + x1 * y2 + x2 * y1 + x2 * y2 / fixed1();
int256 result = x1y1;
result = add(result, x2y1); // Add checks for overflow
result = add(result, x1y2); // Add checks for overflow
result = add(result, x2y2); // Add checks for overflow
return result;
}
/**
* @notice 1/x
* @dev
* Test reciprocal(0) fails
* Test reciprocal(fixed1()) returns fixed1()
* Test reciprocal(fixed1()*fixed1()) returns 1 // Testing how the fractional is truncated
* Test reciprocal(2*fixed1()*fixed1()) returns 0 // Testing how the fractional is truncated
*/
function reciprocal(int256 x) public pure returns (int256) {
require(x != 0);
return (fixed1()*fixed1()) / x; // Can't overflow
}
/**
* @notice x/y. If the dividend is higher than maxFixedDiv() it
* might overflow. You can use multiply(x,reciprocal(y)) instead.
* There is a loss of precision on division for the lower mulPrecision() decimals.
* @dev
* Test divide(fixed1(),0) fails
* Test divide(maxFixedDiv(),1) = maxFixedDiv()*(10^digits())
* Test divide(maxFixedDiv()+1,1) throws
* Test divide(maxFixedDiv(),maxFixedDiv()) returns fixed1()
*/
function divide(int256 x, int256 y) public pure returns (int256) {
if (y == fixed1()) return x;
require(y != 0);
require(y <= maxFixedDivisor());
return multiply(x, reciprocal(y));
}
}
/**
* @title Blocklock
* @author Brendan Asselstine
* @notice A time lock with a cooldown period. When locked, the contract will remain locked until it is unlocked manually
* or the lock duration expires. After the contract is unlocked, it cannot be locked until the cooldown duration expires.
*/
library Blocklock {
using SafeMath for uint256;
struct State {
uint256 lockedAt;
uint256 unlockedAt;
uint256 lockDuration;
uint256 cooldownDuration;
}
/**
* @notice Sets the duration of the lock. This how long the lock lasts before it expires and automatically unlocks.
* @param self The Blocklock state
* @param lockDuration The duration, in blocks, that the lock should last.
*/
function setLockDuration(State storage self, uint256 lockDuration) public {
require(lockDuration > 0, "Blocklock/lock-min");
self.lockDuration = lockDuration;
}
/**
* @notice Sets the cooldown duration in blocks. This is the number of blocks that must pass before being able to
* lock again. The cooldown duration begins when the lock duration expires, or when it is unlocked manually.
* @param self The Blocklock state
* @param cooldownDuration The duration of the cooldown, in blocks.
*/
function setCooldownDuration(State storage self, uint256 cooldownDuration) public {
require(cooldownDuration > 0, "Blocklock/cool-min");
self.cooldownDuration = cooldownDuration;
}
/**
* @notice Returns whether the state is locked at the given block number.
* @param self The Blocklock state
* @param blockNumber The current block number.
*/
function isLocked(State storage self, uint256 blockNumber) public view returns (bool) {
uint256 endAt = lockEndAt(self);
return (
self.lockedAt != 0 &&
blockNumber >= self.lockedAt &&
blockNumber < endAt
);
}
/**
* @notice Locks the state at the given block number.
* @param self The Blocklock state
* @param blockNumber The block number to use as the lock start time
*/
function lock(State storage self, uint256 blockNumber) public {
require(canLock(self, blockNumber), "Blocklock/no-lock");
self.lockedAt = blockNumber;
}
/**
* @notice Manually unlocks the lock.
* @param self The Blocklock state
* @param blockNumber The block number at which the lock is being unlocked.
*/
function unlock(State storage self, uint256 blockNumber) public {
self.unlockedAt = blockNumber;
}
/**
* @notice Returns whether the Blocklock can be locked at the given block number
* @param self The Blocklock state
* @param blockNumber The block number to check against
* @return True if we can lock at the given block number, false otherwise.
*/
function canLock(State storage self, uint256 blockNumber) public view returns (bool) {
uint256 endAt = lockEndAt(self);
return (
self.lockedAt == 0 ||
blockNumber >= endAt.add(self.cooldownDuration)
);
}
function cooldownEndAt(State storage self) internal view returns (uint256) {
return lockEndAt(self).add(self.cooldownDuration);
}
function lockEndAt(State storage self) internal view returns (uint256) {
uint256 endAt = self.lockedAt.add(self.lockDuration);
// if we unlocked early
if (self.unlockedAt >= self.lockedAt && self.unlockedAt < endAt) {
endAt = self.unlockedAt;
}
return endAt;
}
}
/**
Copyright 2020 PoolTogether Inc.
This file is part of PoolTogether.
PoolTogether is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation under version 3 of the License.
PoolTogether is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PoolTogether. If not, see <https://www.gnu.org/licenses/>.
*/
/**
* @dev Interface of the ERC777Token standard as defined in the EIP.
*
* This contract uses the
* https://eips.ethereum.org/EIPS/eip-1820[ERC1820 registry standard] to let
* token holders and recipients react to token movements by using setting implementers
* for the associated interfaces in said registry. See {IERC1820Registry} and
* {ERC1820Implementer}.
*/
interface IERC777 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the smallest part of the token that is not divisible. This
* means all token operations (creation, movement and destruction) must have
* amounts that are a multiple of this number.
*
* For most token contracts, this value will equal 1.
*/
function granularity() external view returns (uint256);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by an account (`owner`).
*/
function balanceOf(address owner) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* If send or receive hooks are registered for the caller and `recipient`,
* the corresponding functions will be called with `data` and empty
* `operatorData`. See {IERC777Sender} and {IERC777Recipient}.
*
* Emits a {Sent} event.
*
* Requirements
*
* - the caller must have at least `amount` tokens.
* - `recipient` cannot be the zero address.
* - if `recipient` is a contract, it must implement the {IERC777Recipient}
* interface.
*/
function send(address recipient, uint256 amount, bytes calldata data) external;
/**
* @dev Destroys `amount` tokens from the caller's account, reducing the
* total supply.
*
* If a send hook is registered for the caller, the corresponding function
* will be called with `data` and empty `operatorData`. See {IERC777Sender}.
*
* Emits a {Burned} event.
*
* Requirements
*
* - the caller must have at least `amount` tokens.
*/
function burn(uint256 amount, bytes calldata data) external;
/**
* @dev Returns true if an account is an operator of `tokenHolder`.
* Operators can send and burn tokens on behalf of their owners. All
* accounts are their own operator.
*
* See {operatorSend} and {operatorBurn}.
*/
function isOperatorFor(address operator, address tokenHolder) external view returns (bool);
/**
* @dev Make an account an operator of the caller.
*
* See {isOperatorFor}.
*
* Emits an {AuthorizedOperator} event.
*
* Requirements
*
* - `operator` cannot be calling address.
*/
function authorizeOperator(address operator) external;
/**
* @dev Make an account an operator of the caller.
*
* See {isOperatorFor} and {defaultOperators}.
*
* Emits a {RevokedOperator} event.
*
* Requirements
*
* - `operator` cannot be calling address.
*/
function revokeOperator(address operator) external;
/**
* @dev Returns the list of default operators. These accounts are operators
* for all token holders, even if {authorizeOperator} was never called on
* them.
*
* This list is immutable, but individual holders may revoke these via
* {revokeOperator}, in which case {isOperatorFor} will return false.
*/
function defaultOperators() external view returns (address[] memory);
/**
* @dev Moves `amount` tokens from `sender` to `recipient`. The caller must
* be an operator of `sender`.
*
* If send or receive hooks are registered for `sender` and `recipient`,
* the corresponding functions will be called with `data` and
* `operatorData`. See {IERC777Sender} and {IERC777Recipient}.
*
* Emits a {Sent} event.
*
* Requirements
*
* - `sender` cannot be the zero address.
* - `sender` must have at least `amount` tokens.
* - the caller must be an operator for `sender`.
* - `recipient` cannot be the zero address.
* - if `recipient` is a contract, it must implement the {IERC777Recipient}
* interface.
*/
function operatorSend(
address sender,
address recipient,
uint256 amount,
bytes calldata data,
bytes calldata operatorData
) external;
/**
* @dev Destoys `amount` tokens from `account`, reducing the total supply.
* The caller must be an operator of `account`.
*
* If a send hook is registered for `account`, the corresponding function
* will be called with `data` and `operatorData`. See {IERC777Sender}.
*
* Emits a {Burned} event.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
* - the caller must be an operator for `account`.
*/
function operatorBurn(
address account,
uint256 amount,
bytes calldata data,
bytes calldata operatorData
) external;
event Sent(
address indexed operator,
address indexed from,
address indexed to,
uint256 amount,
bytes data,
bytes operatorData
);
event Minted(address indexed operator, address indexed to, uint256 amount, bytes data, bytes operatorData);
event Burned(address indexed operator, address indexed from, uint256 amount, bytes data, bytes operatorData);
event AuthorizedOperator(address indexed operator, address indexed tokenHolder);
event RevokedOperator(address indexed operator, address indexed tokenHolder);
}
/**
* @dev Interface of the ERC777TokensSender standard as defined in the EIP.
*
* {IERC777} Token holders can be notified of operations performed on their
* tokens by having a contract implement this interface (contract holders can be
* their own implementer) and registering it on the
* https://eips.ethereum.org/EIPS/eip-1820[ERC1820 global registry].
*
* See {IERC1820Registry} and {ERC1820Implementer}.
*/
interface IERC777Sender {
/**
* @dev Called by an {IERC777} token contract whenever a registered holder's
* (`from`) tokens are about to be moved or destroyed. The type of operation
* is conveyed by `to` being the zero address or not.
*
* This call occurs _before_ the token contract's state is updated, so
* {IERC777-balanceOf}, etc., can be used to query the pre-operation state.
*
* This function may revert to prevent the operation from being executed.
*/
function tokensToSend(
address operator,
address from,
address to,
uint256 amount,
bytes calldata userData,
bytes calldata operatorData
) external;
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* This test is non-exhaustive, and there may be false-negatives: during the
* execution of a contract's constructor, its address will be reported as
* not containing a contract.
*
* IMPORTANT: It is unsafe to assume that an address for which this
* function returns false is an externally-owned account (EOA) and not a
* contract.
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
/**
* @dev Implementation of the {IERC777} interface.
*
* Largely taken from the OpenZeppelin ERC777 contract.
*
* Support for ERC20 is included in this contract, as specified by the EIP: both
* the ERC777 and ERC20 interfaces can be safely used when interacting with it.
* Both {IERC777-Sent} and {IERC20-Transfer} events are emitted on token
* movements.
*
* Additionally, the {IERC777-granularity} value is hard-coded to `1`, meaning that there
* are no special restrictions in the amount of tokens that created, moved, or
* destroyed. This makes integration with ERC20 applications seamless.
*
* It is important to note that no Mint events are emitted. Tokens are minted in batches
* by a state change in a tree data structure, so emitting a Mint event for each user
* is not possible.
*
*/
contract PoolToken is Initializable, IERC20, IERC777 {
using SafeMath for uint256;
using Address for address;
/**
* Event emitted when a user or operator redeems tokens
*/
event Redeemed(address indexed operator, address indexed from, uint256 amount, bytes data, bytes operatorData);
IERC1820Registry constant internal ERC1820_REGISTRY = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24);
// We inline the result of the following hashes because Solidity doesn't resolve them at compile time.
// See https://github.com/ethereum/solidity/issues/4024.
// keccak256("ERC777TokensSender")
bytes32 constant internal TOKENS_SENDER_INTERFACE_HASH =
0x29ddb589b1fb5fc7cf394961c1adf5f8c6454761adf795e67fe149f658abe895;
// keccak256("ERC777TokensRecipient")
bytes32 constant internal TOKENS_RECIPIENT_INTERFACE_HASH =
0xb281fc8c12954d22544db45de3159a39272895b169a852b314f9cc762e44c53b;
// keccak256("ERC777Token")
bytes32 constant internal TOKENS_INTERFACE_HASH =
0xac7fbab5f54a3ca8194167523c6753bfeb96a445279294b6125b68cce2177054;
// keccak256("ERC20Token")
bytes32 constant internal ERC20_TOKENS_INTERFACE_HASH =
0xaea199e31a596269b42cdafd93407f14436db6e4cad65417994c2eb37381e05a;
string internal _name;
string internal _symbol;
// This isn't ever read from - it's only used to respond to the defaultOperators query.
address[] internal _defaultOperatorsArray;
// Immutable, but accounts may revoke them (tracked in __revokedDefaultOperators).
mapping(address => bool) internal _defaultOperators;
// For each account, a mapping of its operators and revoked default operators.
mapping(address => mapping(address => bool)) internal _operators;
mapping(address => mapping(address => bool)) internal _revokedDefaultOperators;
// ERC20-allowances
mapping (address => mapping (address => uint256)) internal _allowances;
// The Pool that is bound to this token
BasePool internal _pool;
/**
* @notice Initializes the PoolToken.
* @param name The name of the token
* @param symbol The token symbol
* @param defaultOperators The default operators who are allowed to move tokens
*/
function init (
string memory name,
string memory symbol,
address[] memory defaultOperators,
BasePool pool
) public initializer {
require(bytes(name).length != 0, "PoolToken/name");
require(bytes(symbol).length != 0, "PoolToken/symbol");
require(address(pool) != address(0), "PoolToken/pool-zero");
_name = name;
_symbol = symbol;
_pool = pool;
_defaultOperatorsArray = defaultOperators;
for (uint256 i = 0; i < _defaultOperatorsArray.length; i++) {
_defaultOperators[_defaultOperatorsArray[i]] = true;
}
// register interfaces
ERC1820_REGISTRY.setInterfaceImplementer(address(this), TOKENS_INTERFACE_HASH, address(this));
ERC1820_REGISTRY.setInterfaceImplementer(address(this), ERC20_TOKENS_INTERFACE_HASH, address(this));
}
/**
* @notice Returns the address of the Pool contract
* @return The address of the pool contract
*/
function pool() public view returns (BasePool) {
return _pool;
}
/**
* @notice Calls the ERC777 transfer hook, and emits Redeemed and Transfer. Can only be called by the Pool contract.
* @param from The address from which to redeem tokens
* @param amount The amount of tokens to redeem
*/
function poolRedeem(address from, uint256 amount) external onlyPool {
_callTokensToSend(from, from, address(0), amount, '', '');
emit Redeemed(from, from, amount, '', '');
emit Transfer(from, address(0), amount);
}
/**
* @dev See {IERC777-name}.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev See {IERC777-symbol}.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev See {ERC20Detailed-decimals}.
*
* Always returns 18, as per the
* [ERC777 EIP](https://eips.ethereum.org/EIPS/eip-777#backward-compatibility).
*/
function decimals() public view returns (uint8) {
return 18;
}
/**
* @dev See {IERC777-granularity}.
*
* This implementation always returns `1`.
*/
function granularity() public view returns (uint256) {
return 1;
}
/**
* @dev See {IERC777-totalSupply}.
*/
function totalSupply() public view returns (uint256) {
return _pool.committedSupply();
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address _addr) external view returns (uint256) {
return _pool.committedBalanceOf(_addr);
}
/**
* @dev See {IERC777-send}.
*
* Also emits a {Transfer} event for ERC20 compatibility.
*/
function send(address recipient, uint256 amount, bytes calldata data) external {
_send(msg.sender, msg.sender, recipient, amount, data, "");
}
/**
* @dev See {IERC20-transfer}.
*
* Unlike `send`, `recipient` is _not_ required to implement the {IERC777Recipient}
* interface if it is a contract.
*
* Also emits a {Sent} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool) {
require(recipient != address(0), "PoolToken/transfer-zero");
address from = msg.sender;
_callTokensToSend(from, from, recipient, amount, "", "");
_move(from, from, recipient, amount, "", "");
_callTokensReceived(from, from, recipient, amount, "", "", false);
return true;
}
/**
* @dev Allows a user to withdraw their tokens as the underlying asset.
*
* Also emits a {Transfer} event for ERC20 compatibility.
*/
function redeem(uint256 amount, bytes calldata data) external {
_redeem(msg.sender, msg.sender, amount, data, "");
}
/**
* @dev See {IERC777-burn}. Not currently implemented.
*
* Also emits a {Transfer} event for ERC20 compatibility.
*/
function burn(uint256, bytes calldata) external {
revert("PoolToken/no-support");
}
/**
* @dev See {IERC777-isOperatorFor}.
*/
function isOperatorFor(
address operator,
address tokenHolder
) public view returns (bool) {
return operator == tokenHolder ||
(_defaultOperators[operator] && !_revokedDefaultOperators[tokenHolder][operator]) ||
_operators[tokenHolder][operator];
}
/**
* @dev See {IERC777-authorizeOperator}.
*/
function authorizeOperator(address operator) external {
require(msg.sender != operator, "PoolToken/auth-self");
if (_defaultOperators[operator]) {
delete _revokedDefaultOperators[msg.sender][operator];
} else {
_operators[msg.sender][operator] = true;
}
emit AuthorizedOperator(operator, msg.sender);
}
/**
* @dev See {IERC777-revokeOperator}.
*/
function revokeOperator(address operator) external {
require(operator != msg.sender, "PoolToken/revoke-self");
if (_defaultOperators[operator]) {
_revokedDefaultOperators[msg.sender][operator] = true;
} else {
delete _operators[msg.sender][operator];
}
emit RevokedOperator(operator, msg.sender);
}
/**
* @dev See {IERC777-defaultOperators}.
*/
function defaultOperators() public view returns (address[] memory) {
return _defaultOperatorsArray;
}
/**
* @dev See {IERC777-operatorSend}.
*
* Emits {Sent} and {Transfer} events.
*/
function operatorSend(
address sender,
address recipient,
uint256 amount,
bytes calldata data,
bytes calldata operatorData
)
external
{
require(isOperatorFor(msg.sender, sender), "PoolToken/not-operator");
_send(msg.sender, sender, recipient, amount, data, operatorData);
}
/**
* @dev See {IERC777-operatorBurn}.
*
* Currently not supported
*/
function operatorBurn(address, uint256, bytes calldata, bytes calldata) external {
revert("PoolToken/no-support");
}
/**
* @dev Allows an operator to redeem tokens for the underlying asset on behalf of a user.
*
* Emits {Redeemed} and {Transfer} events.
*/
function operatorRedeem(address account, uint256 amount, bytes calldata data, bytes calldata operatorData) external {
require(isOperatorFor(msg.sender, account), "PoolToken/not-operator");
_redeem(msg.sender, account, amount, data, operatorData);
}
/**
* @dev See {IERC20-allowance}.
*
* Note that operator and allowance concepts are orthogonal: operators may
* not have allowance, and accounts with allowance may not be operators
* themselves.
*/
function allowance(address holder, address spender) public view returns (uint256) {
return _allowances[holder][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Note that accounts cannot have allowance issued by their operators.
*/
function approve(address spender, uint256 value) external returns (bool) {
address holder = msg.sender;
_approve(holder, spender, value);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue, "PoolToken/negative"));
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Note that operator and allowance concepts are orthogonal: operators cannot
* call `transferFrom` (unless they have allowance), and accounts with
* allowance cannot call `operatorSend` (unless they are operators).
*
* Emits {Sent}, {Transfer} and {Approval} events.
*/
function transferFrom(address holder, address recipient, uint256 amount) external returns (bool) {
require(recipient != address(0), "PoolToken/to-zero");
require(holder != address(0), "PoolToken/from-zero");
address spender = msg.sender;
_callTokensToSend(spender, holder, recipient, amount, "", "");
_move(spender, holder, recipient, amount, "", "");
_approve(holder, spender, _allowances[holder][spender].sub(amount, "PoolToken/exceed-allow"));
_callTokensReceived(spender, holder, recipient, amount, "", "", false);
return true;
}
/**
* Called by the associated Pool to emit `Mint` events.
* @param amount The amount that was minted
*/
function poolMint(uint256 amount) external onlyPool {
_mintEvents(address(_pool), address(_pool), amount, '', '');
}
/**
* Emits {Minted} and {IERC20-Transfer} events.
*/
function _mintEvents(
address operator,
address account,
uint256 amount,
bytes memory userData,
bytes memory operatorData
)
internal
{
emit Minted(operator, account, amount, userData, operatorData);
emit Transfer(address(0), account, amount);
}
/**
* @dev Send tokens
* @param operator address operator requesting the transfer
* @param from address token holder address
* @param to address recipient address
* @param amount uint256 amount of tokens to transfer
* @param userData bytes extra information provided by the token holder (if any)
* @param operatorData bytes extra information provided by the operator (if any)
*/
function _send(
address operator,
address from,
address to,
uint256 amount,
bytes memory userData,
bytes memory operatorData
)
private
{
require(from != address(0), "PoolToken/from-zero");
require(to != address(0), "PoolToken/to-zero");
_callTokensToSend(operator, from, to, amount, userData, operatorData);
_move(operator, from, to, amount, userData, operatorData);
_callTokensReceived(operator, from, to, amount, userData, operatorData, false);
}
/**
* @dev Redeems tokens for the underlying asset.
* @param operator address operator requesting the operation
* @param from address token holder address
* @param amount uint256 amount of tokens to redeem
* @param data bytes extra information provided by the token holder
* @param operatorData bytes extra information provided by the operator (if any)
*/
function _redeem(
address operator,
address from,
uint256 amount,
bytes memory data,
bytes memory operatorData
)
private
{
require(from != address(0), "PoolToken/from-zero");
_callTokensToSend(operator, from, address(0), amount, data, operatorData);
_pool.withdrawCommittedDepositFrom(from, amount);
emit Redeemed(operator, from, amount, data, operatorData);
emit Transfer(from, address(0), amount);
}
/**
* @notice Moves tokens from one user to another. Emits Sent and Transfer events.
*/
function _move(
address operator,
address from,
address to,
uint256 amount,
bytes memory userData,
bytes memory operatorData
)
private
{
_pool.moveCommitted(from, to, amount);
emit Sent(operator, from, to, amount, userData, operatorData);
emit Transfer(from, to, amount);
}
/**
* Approves of a token spend by a spender for a holder.
* @param holder The address from which the tokens are spent
* @param spender The address that is spending the tokens
* @param value The amount of tokens to spend
*/
function _approve(address holder, address spender, uint256 value) private {
require(spender != address(0), "PoolToken/from-zero");
_allowances[holder][spender] = value;
emit Approval(holder, spender, value);
}
/**
* @dev Call from.tokensToSend() if the interface is registered
* @param operator address operator requesting the transfer
* @param from address token holder address
* @param to address recipient address
* @param amount uint256 amount of tokens to transfer
* @param userData bytes extra information provided by the token holder (if any)
* @param operatorData bytes extra information provided by the operator (if any)
*/
function _callTokensToSend(
address operator,
address from,
address to,
uint256 amount,
bytes memory userData,
bytes memory operatorData
)
internal notLocked
{
address implementer = ERC1820_REGISTRY.getInterfaceImplementer(from, TOKENS_SENDER_INTERFACE_HASH);
if (implementer != address(0)) {
IERC777Sender(implementer).tokensToSend(operator, from, to, amount, userData, operatorData);
}
}
/**
* @dev Call to.tokensReceived() if the interface is registered. Reverts if the recipient is a contract but
* tokensReceived() was not registered for the recipient
* @param operator address operator requesting the transfer
* @param from address token holder address
* @param to address recipient address
* @param amount uint256 amount of tokens to transfer
* @param userData bytes extra information provided by the token holder (if any)
* @param operatorData bytes extra information provided by the operator (if any)
* @param requireReceptionAck whether to require that, if the recipient is a contract, it has registered a IERC777Recipient
*/
function _callTokensReceived(
address operator,
address from,
address to,
uint256 amount,
bytes memory userData,
bytes memory operatorData,
bool requireReceptionAck
)
private
{
address implementer = ERC1820_REGISTRY.getInterfaceImplementer(to, TOKENS_RECIPIENT_INTERFACE_HASH);
if (implementer != address(0)) {
IERC777Recipient(implementer).tokensReceived(operator, from, to, amount, userData, operatorData);
} else if (requireReceptionAck) {
require(!to.isContract(), "PoolToken/no-recip-inter");
}
}
/**
* @notice Requires the sender to be the pool contract
*/
modifier onlyPool() {
require(msg.sender == address(_pool), "PoolToken/only-pool");
_;
}
/**
* @notice Requires the contract to be unlocked
*/
modifier notLocked() {
require(!_pool.isLocked(), "PoolToken/is-locked");
_;
}
}
/**
* @title The Pool contract
* @author Brendan Asselstine
* @notice This contract allows users to pool deposits into Compound and win the accrued interest in periodic draws.
* Funds are immediately deposited and withdrawn from the Compound cToken contract.
* Draws go through three stages: open, committed and rewarded in that order.
* Only one draw is ever in the open stage. Users deposits are always added to the open draw. Funds in the open Draw are that user's open balance.
* When a Draw is committed, the funds in it are moved to a user's committed total and the total committed balance of all users is updated.
* When a Draw is rewarded, the gross winnings are the accrued interest since the last reward (if any). A winner is selected with their chances being
* proportional to their committed balance vs the total committed balance of all users.
*
*
* With the above in mind, there is always an open draw and possibly a committed draw. The progression is:
*
* Step 1: Draw 1 Open
* Step 2: Draw 2 Open | Draw 1 Committed
* Step 3: Draw 3 Open | Draw 2 Committed | Draw 1 Rewarded
* Step 4: Draw 4 Open | Draw 3 Committed | Draw 2 Rewarded
* Step 5: Draw 5 Open | Draw 4 Committed | Draw 3 Rewarded
* Step X: ...
*/
contract BasePool is Initializable, ReentrancyGuard {
using DrawManager for DrawManager.State;
using SafeMath for uint256;
using Roles for Roles.Role;
using Blocklock for Blocklock.State;
bytes32 internal constant ROLLED_OVER_ENTROPY_MAGIC_NUMBER = bytes32(uint256(1));
IERC1820Registry constant internal ERC1820_REGISTRY = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24);
// We inline the result of the following hashes because Solidity doesn't resolve them at compile time.
// See https://github.com/ethereum/solidity/issues/4024.
// keccak256("PoolTogetherRewardListener")
bytes32 constant internal REWARD_LISTENER_INTERFACE_HASH =
0x68f03b0b1a978ee238a70b362091d993343460bc1a2830ab3f708936d9f564a4;
/**
* Emitted when a user deposits into the Pool.
* @param sender The purchaser of the tickets
* @param amount The size of the deposit
*/
event Deposited(address indexed sender, uint256 amount);
/**
* Emitted when a user deposits into the Pool and the deposit is immediately committed
* @param sender The purchaser of the tickets
* @param amount The size of the deposit
*/
event DepositedAndCommitted(address indexed sender, uint256 amount);
/**
* Emitted when Sponsors have deposited into the Pool
* @param sender The purchaser of the tickets
* @param amount The size of the deposit
*/
event SponsorshipDeposited(address indexed sender, uint256 amount);
/**
* Emitted when an admin has been added to the Pool.
* @param admin The admin that was added
*/
event AdminAdded(address indexed admin);
/**
* Emitted when an admin has been removed from the Pool.
* @param admin The admin that was removed
*/
event AdminRemoved(address indexed admin);
/**
* Emitted when a user withdraws from the pool.
* @param sender The user that is withdrawing from the pool
* @param amount The amount that the user withdrew
*/
event Withdrawn(address indexed sender, uint256 amount);
/**
* Emitted when a user withdraws their sponsorship and fees from the pool.
* @param sender The user that is withdrawing
* @param amount The amount they are withdrawing
*/
event SponsorshipAndFeesWithdrawn(address indexed sender, uint256 amount);
/**
* Emitted when a user withdraws from their open deposit.
* @param sender The user that is withdrawing
* @param amount The amount they are withdrawing
*/
event OpenDepositWithdrawn(address indexed sender, uint256 amount);
/**
* Emitted when a user withdraws from their committed deposit.
* @param sender The user that is withdrawing
* @param amount The amount they are withdrawing
*/
event CommittedDepositWithdrawn(address indexed sender, uint256 amount);
/**
* Emitted when an address collects a fee
* @param sender The address collecting the fee
* @param amount The fee amount
* @param drawId The draw from which the fee was awarded
*/
event FeeCollected(address indexed sender, uint256 amount, uint256 drawId);
/**
* Emitted when a new draw is opened for deposit.
* @param drawId The draw id
* @param feeBeneficiary The fee beneficiary for this draw
* @param secretHash The committed secret hash
* @param feeFraction The fee fraction of the winnings to be given to the beneficiary
*/
event Opened(
uint256 indexed drawId,
address indexed feeBeneficiary,
bytes32 secretHash,
uint256 feeFraction
);
/**
* Emitted when a draw is committed.
* @param drawId The draw id
*/
event Committed(
uint256 indexed drawId
);
/**
* Emitted when a draw is rewarded.
* @param drawId The draw id
* @param winner The address of the winner
* @param entropy The entropy used to select the winner
* @param winnings The net winnings given to the winner
* @param fee The fee being given to the draw beneficiary
*/
event Rewarded(
uint256 indexed drawId,
address indexed winner,
bytes32 entropy,
uint256 winnings,
uint256 fee
);
/**
* Emitted when a RewardListener call fails
* @param drawId The draw id
* @param winner The address that one the draw
* @param impl The implementation address of the RewardListener
*/
event RewardListenerFailed(
uint256 indexed drawId,
address indexed winner,
address indexed impl
);
/**
* Emitted when the fee fraction is changed. Takes effect on the next draw.
* @param feeFraction The next fee fraction encoded as a fixed point 18 decimal
*/
event NextFeeFractionChanged(uint256 feeFraction);
/**
* Emitted when the next fee beneficiary changes. Takes effect on the next draw.
* @param feeBeneficiary The next fee beneficiary
*/
event NextFeeBeneficiaryChanged(address indexed feeBeneficiary);
/**
* Emitted when an admin pauses the contract
*/
event DepositsPaused(address indexed sender);
/**
* Emitted when an admin unpauses the contract
*/
event DepositsUnpaused(address indexed sender);
/**
* Emitted when the draw is rolled over in the event that the secret is forgotten.
*/
event RolledOver(uint256 indexed drawId);
struct Draw {
uint256 feeFraction; //fixed point 18
address feeBeneficiary;
uint256 openedBlock;
bytes32 secretHash;
bytes32 entropy;
address winner;
uint256 netWinnings;
uint256 fee;
}
/**
* The Compound cToken that this Pool is bound to.
*/
ICErc20 public cToken;
/**
* The fee beneficiary to use for subsequent Draws.
*/
address public nextFeeBeneficiary;
/**
* The fee fraction to use for subsequent Draws.
*/
uint256 public nextFeeFraction;
/**
* The total of all balances
*/
uint256 public accountedBalance;
/**
* The total deposits and winnings for each user.
*/
mapping (address => uint256) internal balances;
/**
* A mapping of draw ids to Draw structures
*/
mapping(uint256 => Draw) internal draws;
/**
* A structure that is used to manage the user's odds of winning.
*/
DrawManager.State internal drawState;
/**
* A structure containing the administrators
*/
Roles.Role internal admins;
/**
* Whether the contract is paused
*/
bool public paused;
Blocklock.State internal blocklock;
PoolToken public poolToken;
/**
* @notice Initializes a new Pool contract.
* @param _owner The owner of the Pool. They are able to change settings and are set as the owner of new lotteries.
* @param _cToken The Compound Finance MoneyMarket contract to supply and withdraw tokens.
* @param _feeFraction The fraction of the gross winnings that should be transferred to the owner as the fee. Is a fixed point 18 number.
* @param _feeBeneficiary The address that will receive the fee fraction
*/
function init (
address _owner,
address _cToken,
uint256 _feeFraction,
address _feeBeneficiary,
uint256 _lockDuration,
uint256 _cooldownDuration
) public initializer {
require(_owner != address(0), "Pool/owner-zero");
require(_cToken != address(0), "Pool/ctoken-zero");
cToken = ICErc20(_cToken);
_addAdmin(_owner);
_setNextFeeFraction(_feeFraction);
_setNextFeeBeneficiary(_feeBeneficiary);
initBlocklock(_lockDuration, _cooldownDuration);
}
function setPoolToken(PoolToken _poolToken) external onlyAdmin {
require(address(poolToken) == address(0), "Pool/token-was-set");
require(address(_poolToken.pool()) == address(this), "Pool/token-mismatch");
poolToken = _poolToken;
}
function initBlocklock(uint256 _lockDuration, uint256 _cooldownDuration) internal {
blocklock.setLockDuration(_lockDuration);
blocklock.setCooldownDuration(_cooldownDuration);
}
/**
* @notice Opens a new Draw.
* @param _secretHash The secret hash to commit to the Draw.
*/
function open(bytes32 _secretHash) internal {
drawState.openNextDraw();
draws[drawState.openDrawIndex] = Draw(
nextFeeFraction,
nextFeeBeneficiary,
block.number,
_secretHash,
bytes32(0),
address(0),
uint256(0),
uint256(0)
);
emit Opened(
drawState.openDrawIndex,
nextFeeBeneficiary,
_secretHash,
nextFeeFraction
);
}
/**
* @notice Emits the Committed event for the current open draw.
*/
function emitCommitted() internal {
uint256 drawId = currentOpenDrawId();
emit Committed(drawId);
if (address(poolToken) != address(0)) {
poolToken.poolMint(openSupply());
}
}
/**
* @notice Commits the current open draw, if any, and opens the next draw using the passed hash. Really this function is only called twice:
* the first after Pool contract creation and the second immediately after.
* Can only be called by an admin.
* May fire the Committed event, and always fires the Open event.
* @param nextSecretHash The secret hash to use to open a new Draw
*/
function openNextDraw(bytes32 nextSecretHash) public onlyAdmin {
if (currentCommittedDrawId() > 0) {
require(currentCommittedDrawHasBeenRewarded(), "Pool/not-reward");
}
if (currentOpenDrawId() != 0) {
emitCommitted();
}
open(nextSecretHash);
}
/**
* @notice Ignores the current draw, and opens the next draw.
* @dev This function will be removed once the winner selection has been decentralized.
* @param nextSecretHash The hash to commit for the next draw
*/
function rolloverAndOpenNextDraw(bytes32 nextSecretHash) public onlyAdmin {
rollover();
openNextDraw(nextSecretHash);
}
/**
* @notice Rewards the current committed draw using the passed secret, commits the current open draw, and opens the next draw using the passed secret hash.
* Can only be called by an admin.
* Fires the Rewarded event, the Committed event, and the Open event.
* @param nextSecretHash The secret hash to use to open a new Draw
* @param lastSecret The secret to reveal to reward the current committed Draw.
* @param _salt The salt that was used to conceal the secret
*/
function rewardAndOpenNextDraw(bytes32 nextSecretHash, bytes32 lastSecret, bytes32 _salt) public onlyAdmin {
reward(lastSecret, _salt);
openNextDraw(nextSecretHash);
}
/**
* @notice Rewards the winner for the current committed Draw using the passed secret.
* The gross winnings are calculated by subtracting the accounted balance from the current underlying cToken balance.
* A winner is calculated using the revealed secret.
* If there is a winner (i.e. any eligible users) then winner's balance is updated with their net winnings.
* The draw beneficiary's balance is updated with the fee.
* The accounted balance is updated to include the fee and, if there was a winner, the net winnings.
* Fires the Rewarded event.
* @param _secret The secret to reveal for the current committed Draw
* @param _salt The salt that was used to conceal the secret
*/
function reward(bytes32 _secret, bytes32 _salt) public onlyAdmin onlyLocked requireCommittedNoReward nonReentrant {
// require that there is a committed draw
// require that the committed draw has not been rewarded
uint256 drawId = currentCommittedDrawId();
Draw storage draw = draws[drawId];
require(draw.secretHash == keccak256(abi.encodePacked(_secret, _salt)), "Pool/bad-secret");
// derive entropy from the revealed secret
bytes32 entropy = keccak256(abi.encodePacked(_secret));
_reward(drawId, draw, entropy);
}
function _reward(uint256 drawId, Draw storage draw, bytes32 entropy) internal {
blocklock.unlock(block.number);
// Select the winner using the hash as entropy
address winningAddress = calculateWinner(entropy);
// Calculate the gross winnings
uint256 underlyingBalance = balance();
uint256 grossWinnings;
// It's possible when the APR is zero that the underlying balance will be slightly lower than the accountedBalance
// due to rounding errors in the Compound contract.
if (underlyingBalance > accountedBalance) {
grossWinnings = capWinnings(underlyingBalance.sub(accountedBalance));
}
// Calculate the beneficiary fee
uint256 fee = calculateFee(draw.feeFraction, grossWinnings);
// Update balance of the beneficiary
balances[draw.feeBeneficiary] = balances[draw.feeBeneficiary].add(fee);
// Calculate the net winnings
uint256 netWinnings = grossWinnings.sub(fee);
draw.winner = winningAddress;
draw.netWinnings = netWinnings;
draw.fee = fee;
draw.entropy = entropy;
// If there is a winner who is to receive non-zero winnings
if (winningAddress != address(0) && netWinnings != 0) {
// Updated the accounted total
accountedBalance = underlyingBalance;
// Update balance of the winner
balances[winningAddress] = balances[winningAddress].add(netWinnings);
// Enter their winnings into the open draw
drawState.deposit(winningAddress, netWinnings);
callRewarded(winningAddress, netWinnings, drawId);
} else {
// Only account for the fee
accountedBalance = accountedBalance.add(fee);
}
emit Rewarded(
drawId,
winningAddress,
entropy,
netWinnings,
fee
);
emit FeeCollected(draw.feeBeneficiary, fee, drawId);
}
/**
* @notice Calls the reward listener for the winner, if a listener exists.
* @dev Checks for a listener using the ERC1820 registry. The listener is given a gas stipend of 200,000 to run the function.
* The number 200,000 was selected because it's safely above the gas requirements for PoolTogether [Pod](https://github.com/pooltogether/pods) contract.
*
* @param winner The winner. If they have a listener registered in the ERC1820 registry it will be called.
* @param netWinnings The amount that was won.
* @param drawId The draw id that was won.
*/
function callRewarded(address winner, uint256 netWinnings, uint256 drawId) internal {
address impl = ERC1820_REGISTRY.getInterfaceImplementer(winner, REWARD_LISTENER_INTERFACE_HASH);
if (impl != address(0)) {
(bool success,) = impl.call.gas(200000)(abi.encodeWithSignature("rewarded(address,uint256,uint256)", winner, netWinnings, drawId));
if (!success) {
emit RewardListenerFailed(drawId, winner, impl);
}
}
}
/**
* @notice A function that skips the reward for the committed draw id.
* @dev This function will be removed once the entropy is decentralized.
*/
function rollover() public onlyAdmin requireCommittedNoReward {
uint256 drawId = currentCommittedDrawId();
Draw storage draw = draws[drawId];
draw.entropy = ROLLED_OVER_ENTROPY_MAGIC_NUMBER;
emit RolledOver(
drawId
);
emit Rewarded(
drawId,
address(0),
ROLLED_OVER_ENTROPY_MAGIC_NUMBER,
0,
0
);
}
/**
* @notice Ensures that the winnings don't overflow. Note that we can make this integer max, because the fee
* is always less than zero (meaning the FixidityLib.multiply will always make the number smaller)
*/
function capWinnings(uint256 _grossWinnings) internal pure returns (uint256) {
uint256 max = uint256(FixidityLib.maxNewFixed());
if (_grossWinnings > max) {
return max;
}
return _grossWinnings;
}
/**
* @notice Calculate the beneficiary fee using the passed fee fraction and gross winnings.
* @param _feeFraction The fee fraction, between 0 and 1, represented as a 18 point fixed number.
* @param _grossWinnings The gross winnings to take a fraction of.
*/
function calculateFee(uint256 _feeFraction, uint256 _grossWinnings) internal pure returns (uint256) {
int256 grossWinningsFixed = FixidityLib.newFixed(int256(_grossWinnings));
// _feeFraction *must* be less than 1 ether, so it will never overflow
int256 feeFixed = FixidityLib.multiply(grossWinningsFixed, FixidityLib.newFixed(int256(_feeFraction), uint8(18)));
return uint256(FixidityLib.fromFixed(feeFixed));
}
/**
* @notice Allows a user to deposit a sponsorship amount. The deposit is transferred into the cToken.
* Sponsorships allow a user to contribute to the pool without becoming eligible to win. They can withdraw their sponsorship at any time.
* The deposit will immediately be added to Compound and the interest will contribute to the next draw.
* @param _amount The amount of the token underlying the cToken to deposit.
*/
function depositSponsorship(uint256 _amount) public unlessDepositsPaused nonReentrant {
// Transfer the tokens into this contract
require(token().transferFrom(msg.sender, address(this), _amount), "Pool/t-fail");
// Deposit the sponsorship amount
_depositSponsorshipFrom(msg.sender, _amount);
}
/**
* @notice Deposits the token balance for this contract as a sponsorship.
* If people erroneously transfer tokens to this contract, this function will allow us to recoup those tokens as sponsorship.
*/
function transferBalanceToSponsorship() public unlessDepositsPaused {
// Deposit the sponsorship amount
_depositSponsorshipFrom(address(this), token().balanceOf(address(this)));
}
/**
* @notice Deposits into the pool under the current open Draw. The deposit is transferred into the cToken.
* Once the open draw is committed, the deposit will be added to the user's total committed balance and increase their chances of winning
* proportional to the total committed balance of all users.
* @param _amount The amount of the token underlying the cToken to deposit.
*/
function depositPool(uint256 _amount) public requireOpenDraw unlessDepositsPaused nonReentrant notLocked {
// Transfer the tokens into this contract
require(token().transferFrom(msg.sender, address(this), _amount), "Pool/t-fail");
// Deposit the funds
_depositPoolFrom(msg.sender, _amount);
}
/**
* @notice Deposits sponsorship for a user
* @param _spender The user who is sponsoring
* @param _amount The amount they are sponsoring
*/
function _depositSponsorshipFrom(address _spender, uint256 _amount) internal {
// Deposit the funds
_depositFrom(_spender, _amount);
emit SponsorshipDeposited(_spender, _amount);
}
/**
* @notice Deposits into the pool for a user. The deposit will be open until the next draw is committed.
* @param _spender The user who is depositing
* @param _amount The amount the user is depositing
*/
function _depositPoolFrom(address _spender, uint256 _amount) internal {
// Update the user's eligibility
drawState.deposit(_spender, _amount);
_depositFrom(_spender, _amount);
emit Deposited(_spender, _amount);
}
/**
* @notice Deposits into the pool for a user. The deposit is made part of the currently committed draw
* @param _spender The user who is depositing
* @param _amount The amount to deposit
*/
function _depositPoolFromCommitted(address _spender, uint256 _amount) internal notLocked {
// Update the user's eligibility
drawState.depositCommitted(_spender, _amount);
_depositFrom(_spender, _amount);
emit DepositedAndCommitted(_spender, _amount);
}
/**
* @notice Deposits into the pool for a user. Updates their balance and transfers their tokens into this contract.
* @param _spender The user who is depositing
* @param _amount The amount they are depositing
*/
function _depositFrom(address _spender, uint256 _amount) internal {
// Update the user's balance
balances[_spender] = balances[_spender].add(_amount);
// Update the total of this contract
accountedBalance = accountedBalance.add(_amount);
// Deposit into Compound
require(token().approve(address(cToken), _amount), "Pool/approve");
require(cToken.mint(_amount) == 0, "Pool/supply");
}
/**
* Withdraws the given amount from the user's deposits. It first withdraws from their sponsorship,
* then their open deposits, then their committed deposits.
*
* @param amount The amount to withdraw.
*/
function withdraw(uint256 amount) public nonReentrant notLocked {
uint256 remainingAmount = amount;
// first sponsorship
uint256 sponsorshipAndFeesBalance = sponsorshipAndFeeBalanceOf(msg.sender);
if (sponsorshipAndFeesBalance < remainingAmount) {
withdrawSponsorshipAndFee(sponsorshipAndFeesBalance);
remainingAmount = remainingAmount.sub(sponsorshipAndFeesBalance);
} else {
withdrawSponsorshipAndFee(remainingAmount);
return;
}
// now pending
uint256 pendingBalance = drawState.openBalanceOf(msg.sender);
if (pendingBalance < remainingAmount) {
_withdrawOpenDeposit(msg.sender, pendingBalance);
remainingAmount = remainingAmount.sub(pendingBalance);
} else {
_withdrawOpenDeposit(msg.sender, remainingAmount);
return;
}
// now committed. remainingAmount should not be greater than committed balance.
_withdrawCommittedDeposit(msg.sender, remainingAmount);
}
/**
* @notice Withdraw the sender's entire balance back to them.
*/
function withdraw() public nonReentrant notLocked {
uint256 committedBalance = drawState.committedBalanceOf(msg.sender);
uint256 balance = balances[msg.sender];
// Update their chances of winning
drawState.withdraw(msg.sender);
_withdraw(msg.sender, balance);
if (address(poolToken) != address(0)) {
poolToken.poolRedeem(msg.sender, committedBalance);
}
emit Withdrawn(msg.sender, balance);
}
/**
* Withdraws only from the sender's sponsorship and fee balances
* @param _amount The amount to withdraw
*/
function withdrawSponsorshipAndFee(uint256 _amount) public {
uint256 sponsorshipAndFees = sponsorshipAndFeeBalanceOf(msg.sender);
require(_amount <= sponsorshipAndFees, "Pool/exceeds-sfee");
_withdraw(msg.sender, _amount);
emit SponsorshipAndFeesWithdrawn(msg.sender, _amount);
}
/**
* Returns the total balance of the user's sponsorship and fees
* @param _sender The user whose balance should be returned
*/
function sponsorshipAndFeeBalanceOf(address _sender) public view returns (uint256) {
return balances[_sender].sub(drawState.balanceOf(_sender));
}
/**
* Withdraws from the user's open deposits
* @param _amount The amount to withdraw
*/
function withdrawOpenDeposit(uint256 _amount) public nonReentrant notLocked {
_withdrawOpenDeposit(msg.sender, _amount);
}
function _withdrawOpenDeposit(address sender, uint256 _amount) internal {
drawState.withdrawOpen(sender, _amount);
_withdraw(sender, _amount);
emit OpenDepositWithdrawn(sender, _amount);
}
/**
* Withdraws from the user's committed deposits
* @param _amount The amount to withdraw
*/
function withdrawCommittedDeposit(uint256 _amount) public nonReentrant notLocked returns (bool) {
_withdrawCommittedDeposit(msg.sender, _amount);
return true;
}
function _withdrawCommittedDeposit(address sender, uint256 _amount) internal {
_withdrawCommittedDepositAndEmit(sender, _amount);
if (address(poolToken) != address(0)) {
poolToken.poolRedeem(sender, _amount);
}
}
/**
* Allows the associated PoolToken to withdraw for a user; useful when redeeming through the token.
* @param _from The user to withdraw from
* @param _amount The amount to withdraw
*/
function withdrawCommittedDepositFrom(
address _from,
uint256 _amount
) external onlyToken notLocked returns (bool) {
return _withdrawCommittedDepositAndEmit(_from, _amount);
}
/**
* A function that withdraws committed deposits for a user and emits the corresponding events.
* @param _from User to withdraw for
* @param _amount The amount to withdraw
*/
function _withdrawCommittedDepositAndEmit(address _from, uint256 _amount) internal returns (bool) {
drawState.withdrawCommitted(_from, _amount);
_withdraw(_from, _amount);
emit CommittedDepositWithdrawn(_from, _amount);
return true;
}
/**
* @notice Allows the associated PoolToken to move committed tokens from one user to another.
* @param _from The account to move tokens from
* @param _to The account that is receiving the tokens
* @param _amount The amount of tokens to transfer
*/
function moveCommitted(
address _from,
address _to,
uint256 _amount
) external onlyToken onlyCommittedBalanceGteq(_from, _amount) notLocked returns (bool) {
balances[_from] = balances[_from].sub(_amount, "move could not sub amount");
balances[_to] = balances[_to].add(_amount);
drawState.withdrawCommitted(_from, _amount);
drawState.depositCommitted(_to, _amount);
return true;
}
/**
* @notice Transfers tokens from the cToken contract to the sender. Updates the accounted balance.
*/
function _withdraw(address _sender, uint256 _amount) internal {
uint256 balance = balances[_sender];
require(_amount <= balance, "Pool/no-funds");
// Update the user's balance
balances[_sender] = balance.sub(_amount);
// Update the total of this contract
accountedBalance = accountedBalance.sub(_amount);
// Withdraw from Compound and transfer
require(cToken.redeemUnderlying(_amount) == 0, "Pool/redeem");
require(token().transfer(_sender, _amount), "Pool/transfer");
}
/**
* @notice Returns the id of the current open Draw.
* @return The current open Draw id
*/
function currentOpenDrawId() public view returns (uint256) {
return drawState.openDrawIndex;
}
/**
* @notice Returns the id of the current committed Draw.
* @return The current committed Draw id
*/
function currentCommittedDrawId() public view returns (uint256) {
if (drawState.openDrawIndex > 1) {
return drawState.openDrawIndex - 1;
} else {
return 0;
}
}
/**
* @notice Returns whether the current committed draw has been rewarded
* @return True if the current committed draw has been rewarded, false otherwise
*/
function currentCommittedDrawHasBeenRewarded() internal view returns (bool) {
Draw storage draw = draws[currentCommittedDrawId()];
return draw.entropy != bytes32(0);
}
/**
* @notice Gets information for a given draw.
* @param _drawId The id of the Draw to retrieve info for.
* @return Fields including:
* feeFraction: the fee fraction
* feeBeneficiary: the beneficiary of the fee
* openedBlock: The block at which the draw was opened
* secretHash: The hash of the secret committed to this draw.
* entropy: the entropy used to select the winner
* winner: the address of the winner
* netWinnings: the total winnings less the fee
* fee: the fee taken by the beneficiary
*/
function getDraw(uint256 _drawId) public view returns (
uint256 feeFraction,
address feeBeneficiary,
uint256 openedBlock,
bytes32 secretHash,
bytes32 entropy,
address winner,
uint256 netWinnings,
uint256 fee
) {
Draw storage draw = draws[_drawId];
feeFraction = draw.feeFraction;
feeBeneficiary = draw.feeBeneficiary;
openedBlock = draw.openedBlock;
secretHash = draw.secretHash;
entropy = draw.entropy;
winner = draw.winner;
netWinnings = draw.netWinnings;
fee = draw.fee;
}
/**
* @notice Returns the total of the address's balance in committed Draws. That is, the total that contributes to their chances of winning.
* @param _addr The address of the user
* @return The total committed balance for the user
*/
function committedBalanceOf(address _addr) external view returns (uint256) {
return drawState.committedBalanceOf(_addr);
}
/**
* @notice Returns the total of the address's balance in the open Draw. That is, the total that will *eventually* contribute to their chances of winning.
* @param _addr The address of the user
* @return The total open balance for the user
*/
function openBalanceOf(address _addr) external view returns (uint256) {
return drawState.openBalanceOf(_addr);
}
/**
* @notice Returns a user's total balance. This includes their sponsorships, fees, open deposits, and committed deposits.
* @param _addr The address of the user to check.
* @return The user's current balance.
*/
function totalBalanceOf(address _addr) external view returns (uint256) {
return balances[_addr];
}
/**
* @notice Returns a user's committed balance. This is the balance of their Pool tokens.
* @param _addr The address of the user to check.
* @return The user's current balance.
*/
function balanceOf(address _addr) external view returns (uint256) {
return drawState.committedBalanceOf(_addr);
}
/**
* @notice Calculates a winner using the passed entropy for the current committed balances.
* @param _entropy The entropy to use to select the winner
* @return The winning address
*/
function calculateWinner(bytes32 _entropy) public view returns (address) {
return drawState.drawWithEntropy(_entropy);
}
/**
* @notice Returns the total committed balance. Used to compute an address's chances of winning.
* @return The total committed balance.
*/
function committedSupply() public view returns (uint256) {
return drawState.committedSupply();
}
/**
* @notice Returns the total open balance. This balance is the number of tickets purchased for the open draw.
* @return The total open balance
*/
function openSupply() public view returns (uint256) {
return drawState.openSupply();
}
/**
* @notice Calculates the total estimated interest earned for the given number of blocks
* @param _blocks The number of block that interest accrued for
* @return The total estimated interest as a 18 point fixed decimal.
*/
function estimatedInterestRate(uint256 _blocks) public view returns (uint256) {
return supplyRatePerBlock().mul(_blocks);
}
/**
* @notice Convenience function to return the supplyRatePerBlock value from the money market contract.
* @return The cToken supply rate per block
*/
function supplyRatePerBlock() public view returns (uint256) {
return cToken.supplyRatePerBlock();
}
/**
* @notice Sets the beneficiary fee fraction for subsequent Draws.
* Fires the NextFeeFractionChanged event.
* Can only be called by an admin.
* @param _feeFraction The fee fraction to use.
* Must be between 0 and 1 and formatted as a fixed point number with 18 decimals (as in Ether).
*/
function setNextFeeFraction(uint256 _feeFraction) public onlyAdmin {
_setNextFeeFraction(_feeFraction);
}
function _setNextFeeFraction(uint256 _feeFraction) internal {
require(_feeFraction <= 1 ether, "Pool/less-1");
nextFeeFraction = _feeFraction;
emit NextFeeFractionChanged(_feeFraction);
}
/**
* @notice Sets the fee beneficiary for subsequent Draws.
* Can only be called by admins.
* @param _feeBeneficiary The beneficiary for the fee fraction. Cannot be the 0 address.
*/
function setNextFeeBeneficiary(address _feeBeneficiary) public onlyAdmin {
_setNextFeeBeneficiary(_feeBeneficiary);
}
/**
* @notice Sets the fee beneficiary for subsequent Draws.
* @param _feeBeneficiary The beneficiary for the fee fraction. Cannot be the 0 address.
*/
function _setNextFeeBeneficiary(address _feeBeneficiary) internal {
require(_feeBeneficiary != address(0), "Pool/not-zero");
nextFeeBeneficiary = _feeBeneficiary;
emit NextFeeBeneficiaryChanged(_feeBeneficiary);
}
/**
* @notice Adds an administrator.
* Can only be called by administrators.
* Fires the AdminAdded event.
* @param _admin The address of the admin to add
*/
function addAdmin(address _admin) public onlyAdmin {
_addAdmin(_admin);
}
/**
* @notice Checks whether a given address is an administrator.
* @param _admin The address to check
* @return True if the address is an admin, false otherwise.
*/
function isAdmin(address _admin) public view returns (bool) {
return admins.has(_admin);
}
/**
* @notice Checks whether a given address is an administrator.
* @param _admin The address to check
* @return True if the address is an admin, false otherwise.
*/
function _addAdmin(address _admin) internal {
admins.add(_admin);
emit AdminAdded(_admin);
}
/**
* @notice Removes an administrator
* Can only be called by an admin.
* Admins cannot remove themselves. This ensures there is always one admin.
* @param _admin The address of the admin to remove
*/
function removeAdmin(address _admin) public onlyAdmin {
require(admins.has(_admin), "Pool/no-admin");
require(_admin != msg.sender, "Pool/remove-self");
admins.remove(_admin);
emit AdminRemoved(_admin);
}
/**
* Requires that there is a committed draw that has not been rewarded.
*/
modifier requireCommittedNoReward() {
require(currentCommittedDrawId() > 0, "Pool/committed");
require(!currentCommittedDrawHasBeenRewarded(), "Pool/already");
_;
}
/**
* @notice Returns the token underlying the cToken.
* @return An ERC20 token address
*/
function token() public view returns (IERC20) {
return IERC20(cToken.underlying());
}
/**
* @notice Returns the underlying balance of this contract in the cToken.
* @return The cToken underlying balance for this contract.
*/
function balance() public returns (uint256) {
return cToken.balanceOfUnderlying(address(this));
}
/**
* @notice Locks the movement of tokens (essentially the committed deposits and winnings)
* @dev The lock only lasts for a duration of blocks. The lock cannot be relocked until the cooldown duration completes.
*/
function lockTokens() public onlyAdmin {
blocklock.lock(block.number);
}
/**
* @notice Unlocks the movement of tokens (essentially the committed deposits)
*/
function unlockTokens() public onlyAdmin {
blocklock.unlock(block.number);
}
/**
* Pauses all deposits into the contract. This was added so that we can slowly deprecate Pools. Users can continue
* to collect rewards and withdraw, but eventually the Pool will grow smaller.
*
* emits DepositsPaused
*/
function pauseDeposits() public unlessDepositsPaused onlyAdmin {
paused = true;
emit DepositsPaused(msg.sender);
}
/**
* @notice Unpauses all deposits into the contract
*
* emits DepositsUnpaused
*/
function unpauseDeposits() public whenDepositsPaused onlyAdmin {
paused = false;
emit DepositsUnpaused(msg.sender);
}
/**
* @notice Check if the contract is locked.
* @return True if the contract is locked, false otherwise
*/
function isLocked() public view returns (bool) {
return blocklock.isLocked(block.number);
}
/**
* @notice Returns the block number at which the lock expires
* @return The block number at which the lock expires
*/
function lockEndAt() public view returns (uint256) {
return blocklock.lockEndAt();
}
/**
* @notice Check cooldown end block
* @return The block number at which the cooldown ends and the contract can be re-locked
*/
function cooldownEndAt() public view returns (uint256) {
return blocklock.cooldownEndAt();
}
/**
* @notice Returns whether the contract can be locked
* @return True if the contract can be locked, false otherwise
*/
function canLock() public view returns (bool) {
return blocklock.canLock(block.number);
}
/**
* @notice Duration of the lock
* @return Returns the duration of the lock in blocks.
*/
function lockDuration() public view returns (uint256) {
return blocklock.lockDuration;
}
/**
* @notice Returns the cooldown duration. The cooldown period starts after the Pool has been unlocked.
* The Pool cannot be locked during the cooldown period.
* @return The cooldown duration in blocks
*/
function cooldownDuration() public view returns (uint256) {
return blocklock.cooldownDuration;
}
/**
* @notice requires the pool not to be locked
*/
modifier notLocked() {
require(!blocklock.isLocked(block.number), "Pool/locked");
_;
}
/**
* @notice requires the pool to be locked
*/
modifier onlyLocked() {
require(blocklock.isLocked(block.number), "Pool/unlocked");
_;
}
/**
* @notice requires the caller to be an admin
*/
modifier onlyAdmin() {
require(admins.has(msg.sender), "Pool/admin");
_;
}
/**
* @notice Requires an open draw to exist
*/
modifier requireOpenDraw() {
require(currentOpenDrawId() != 0, "Pool/no-open");
_;
}
/**
* @notice Requires deposits to be paused
*/
modifier whenDepositsPaused() {
require(paused, "Pool/d-not-paused");
_;
}
/**
* @notice Requires deposits not to be paused
*/
modifier unlessDepositsPaused() {
require(!paused, "Pool/d-paused");
_;
}
/**
* @notice Requires the caller to be the pool token
*/
modifier onlyToken() {
require(msg.sender == address(poolToken), "Pool/only-token");
_;
}
/**
* @notice requires the passed user's committed balance to be greater than or equal to the passed amount
* @param _from The user whose committed balance should be checked
* @param _amount The minimum amount they must have
*/
modifier onlyCommittedBalanceGteq(address _from, uint256 _amount) {
uint256 committedBalance = drawState.committedBalanceOf(_from);
require(_amount <= committedBalance, "not enough funds");
_;
}
}
contract ScdMcdMigration {
SaiTubLike public tub;
VatLike public vat;
ManagerLike public cdpManager;
JoinLike public saiJoin;
JoinLike public wethJoin;
JoinLike public daiJoin;
constructor(
address tub_, // SCD tub contract address
address cdpManager_, // MCD manager contract address
address saiJoin_, // MCD SAI collateral adapter contract address
address wethJoin_, // MCD ETH collateral adapter contract address
address daiJoin_ // MCD DAI adapter contract address
) public {
tub = SaiTubLike(tub_);
cdpManager = ManagerLike(cdpManager_);
vat = VatLike(cdpManager.vat());
saiJoin = JoinLike(saiJoin_);
wethJoin = JoinLike(wethJoin_);
daiJoin = JoinLike(daiJoin_);
require(wethJoin.gem() == tub.gem(), "non-matching-weth");
require(saiJoin.gem() == tub.sai(), "non-matching-sai");
tub.gov().approve(address(tub), uint(-1));
tub.skr().approve(address(tub), uint(-1));
tub.sai().approve(address(tub), uint(-1));
tub.sai().approve(address(saiJoin), uint(-1));
wethJoin.gem().approve(address(wethJoin), uint(-1));
daiJoin.dai().approve(address(daiJoin), uint(-1));
vat.hope(address(daiJoin));
}
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, "add-overflow");
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, "sub-underflow");
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, "mul-overflow");
}
function toInt(uint x) internal pure returns (int y) {
y = int(x);
require(y >= 0, "int-overflow");
}
// Function to swap SAI to DAI
// This function is to be used by users that want to get new DAI in exchange of old one (aka SAI)
// wad amount has to be <= the value pending to reach the debt ceiling (the minimum between general and ilk one)
function swapSaiToDai(
uint wad
) external {
// Get wad amount of SAI from user's wallet:
saiJoin.gem().transferFrom(msg.sender, address(this), wad);
// Join the SAI wad amount to the `vat`:
saiJoin.join(address(this), wad);
// Lock the SAI wad amount to the CDP and generate the same wad amount of DAI
vat.frob(saiJoin.ilk(), address(this), address(this), address(this), toInt(wad), toInt(wad));
// Send DAI wad amount as a ERC20 token to the user's wallet
daiJoin.exit(msg.sender, wad);
}
// Function to swap DAI to SAI
// This function is to be used by users that want to get SAI in exchange of DAI
// wad amount has to be <= the amount of SAI locked (and DAI generated) in the migration contract SAI CDP
function swapDaiToSai(
uint wad
) external {
// Get wad amount of DAI from user's wallet:
daiJoin.dai().transferFrom(msg.sender, address(this), wad);
// Join the DAI wad amount to the vat:
daiJoin.join(address(this), wad);
// Payback the DAI wad amount and unlocks the same value of SAI collateral
vat.frob(saiJoin.ilk(), address(this), address(this), address(this), -toInt(wad), -toInt(wad));
// Send SAI wad amount as a ERC20 token to the user's wallet
saiJoin.exit(msg.sender, wad);
}
// Function to migrate a SCD CDP to MCD one (needs to be used via a proxy so the code can be kept simpler). Check MigrationProxyActions.sol code for usage.
// In order to use migrate function, SCD CDP debtAmt needs to be <= SAI previously deposited in the SAI CDP * (100% - Collateralization Ratio)
function migrate(
bytes32 cup
) external returns (uint cdp) {
// Get values
uint debtAmt = tub.tab(cup); // CDP SAI debt
uint pethAmt = tub.ink(cup); // CDP locked collateral
uint ethAmt = tub.bid(pethAmt); // CDP locked collateral equiv in ETH
// Take SAI out from MCD SAI CDP. For this operation is necessary to have a very low collateralization ratio
// This is not actually a problem as this ilk will only be accessed by this migration contract,
// which will make sure to have the amounts balanced out at the end of the execution.
vat.frob(
bytes32(saiJoin.ilk()),
address(this),
address(this),
address(this),
-toInt(debtAmt),
0
);
saiJoin.exit(address(this), debtAmt); // SAI is exited as a token
// Shut SAI CDP and gets WETH back
tub.shut(cup); // CDP is closed using the SAI just exited and the MKR previously sent by the user (via the proxy call)
tub.exit(pethAmt); // Converts PETH to WETH
// Open future user's CDP in MCD
cdp = cdpManager.open(wethJoin.ilk(), address(this));
// Join WETH to Adapter
wethJoin.join(cdpManager.urns(cdp), ethAmt);
// Lock WETH in future user's CDP and generate debt to compensate the SAI used to paid the SCD CDP
(, uint rate,,,) = vat.ilks(wethJoin.ilk());
cdpManager.frob(
cdp,
toInt(ethAmt),
toInt(mul(debtAmt, 10 ** 27) / rate + 1) // To avoid rounding issues we add an extra wei of debt
);
// Move DAI generated to migration contract (to recover the used funds)
cdpManager.move(cdp, address(this), mul(debtAmt, 10 ** 27));
// Re-balance MCD SAI migration contract's CDP
vat.frob(
bytes32(saiJoin.ilk()),
address(this),
address(this),
address(this),
0,
-toInt(debtAmt)
);
// Set ownership of CDP to the user
cdpManager.give(cdp, msg.sender);
}
}
/**
* @dev Interface of the ERC777TokensRecipient standard as defined in the EIP.
*
* Accounts can be notified of {IERC777} tokens being sent to them by having a
* contract implement this interface (contract holders can be their own
* implementer) and registering it on the
* https://eips.ethereum.org/EIPS/eip-1820[ERC1820 global registry].
*
* See {IERC1820Registry} and {ERC1820Implementer}.
*/
interface IERC777Recipient {
/**
* @dev Called by an {IERC777} token contract whenever tokens are being
* moved or created into a registered account (`to`). The type of operation
* is conveyed by `from` being the zero address or not.
*
* This call occurs _after_ the token contract's state is updated, so
* {IERC777-balanceOf}, etc., can be used to query the post-operation state.
*
* This function may revert to prevent the operation from being executed.
*/
function tokensReceived(
address operator,
address from,
address to,
uint256 amount,
bytes calldata userData,
bytes calldata operatorData
) external;
}
/**
* @title MCDAwarePool
* @author Brendan Asselstine [email protected]
* @notice This contract is a Pool that is aware of the new Multi-Collateral Dai. It uses the ERC777Recipient interface to
* detect if it's being transferred tickets from the old single collateral Dai (Sai) Pool. If it is, it migrates the Sai to Dai
* and immediately deposits the new Dai as committed tickets for that user. We are knowingly bypassing the committed period for
* users to encourage them to migrate to the MCD Pool.
*/
contract MCDAwarePool is BasePool, IERC777Recipient {
IERC1820Registry constant internal ERC1820_REGISTRY = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24);
// keccak256("ERC777TokensRecipient")
bytes32 constant internal TOKENS_RECIPIENT_INTERFACE_HASH =
0xb281fc8c12954d22544db45de3159a39272895b169a852b314f9cc762e44c53b;
uint256 internal constant DEFAULT_LOCK_DURATION = 40;
uint256 internal constant DEFAULT_COOLDOWN_DURATION = 80;
/**
* @notice The address of the ScdMcdMigration contract (see https://github.com/makerdao/developerguides/blob/master/mcd/upgrading-to-multi-collateral-dai/upgrading-to-multi-collateral-dai.md#direct-integration-with-smart-contracts)
*/
ScdMcdMigration public scdMcdMigration;
/**
* @notice The address of the Sai Pool contract
*/
MCDAwarePool public saiPool;
/**
* @notice Initializes the contract.
* @param _owner The initial administrator of the contract
* @param _cToken The Compound cToken to bind this Pool to
* @param _feeFraction The fraction of the winnings to give to the beneficiary
* @param _feeBeneficiary The beneficiary who receives the fee
*/
function init (
address _owner,
address _cToken,
uint256 _feeFraction,
address _feeBeneficiary,
uint256 lockDuration,
uint256 cooldownDuration
) public initializer {
super.init(
_owner,
_cToken,
_feeFraction,
_feeBeneficiary,
lockDuration,
cooldownDuration
);
initRegistry();
initBlocklock(lockDuration, cooldownDuration);
}
/**
* @notice Used to initialize the BasePool contract after an upgrade. Registers the MCDAwarePool with the ERC1820 registry so that it can receive tokens, and inits the block lock.
*/
function initMCDAwarePool(uint256 lockDuration, uint256 cooldownDuration) public {
initRegistry();
if (blocklock.lockDuration == 0) {
initBlocklock(lockDuration, cooldownDuration);
}
}
function initRegistry() internal {
ERC1820_REGISTRY.setInterfaceImplementer(address(this), TOKENS_RECIPIENT_INTERFACE_HASH, address(this));
}
function initMigration(ScdMcdMigration _scdMcdMigration, MCDAwarePool _saiPool) public onlyAdmin {
_initMigration(_scdMcdMigration, _saiPool);
}
function _initMigration(ScdMcdMigration _scdMcdMigration, MCDAwarePool _saiPool) internal {
require(address(scdMcdMigration) == address(0), "Pool/init");
require(address(_scdMcdMigration) != address(0), "Pool/mig-def");
scdMcdMigration = _scdMcdMigration;
saiPool = _saiPool; // may be null
}
/**
* @notice Called by an ERC777 token when tokens are sent, transferred, or minted. If the sender is the original Sai Pool
* and this pool is bound to the Dai token then it will accept the transfer, migrate the tokens, and deposit on behalf of
* the sender. It will reject all other tokens.
*
* If there is a committed draw this function will mint the user tickets immediately, otherwise it will place them in the
* open prize. This is to encourage migration.
*
* @param from The sender
* @param amount The amount they are transferring
*/
function tokensReceived(
address, // operator
address from,
address, // to address can't be anything but us because we don't implement ERC1820ImplementerInterface
uint256 amount,
bytes calldata,
bytes calldata
) external unlessDepositsPaused {
require(msg.sender == address(saiPoolToken()), "Pool/sai-only");
require(address(token()) == address(daiToken()), "Pool/not-dai");
// cash out of the Pool. This call transfers sai to this contract
saiPoolToken().redeem(amount, '');
// approve of the transfer to the migration contract
saiToken().approve(address(scdMcdMigration), amount);
// migrate the sai to dai. The contract now has dai
scdMcdMigration.swapSaiToDai(amount);
if (currentCommittedDrawId() > 0) {
// now deposit the dai as tickets
_depositPoolFromCommitted(from, amount);
} else {
_depositPoolFrom(from, amount);
}
}
/**
* @notice Returns the address of the PoolSai pool token contract
* @return The address of the Sai PoolToken contract
*/
function saiPoolToken() internal view returns (PoolToken) {
if (address(saiPool) != address(0)) {
return saiPool.poolToken();
} else {
return PoolToken(0);
}
}
/**
* @notice Returns the address of the Sai token
* @return The address of the sai token
*/
function saiToken() public returns (GemLike) {
return scdMcdMigration.saiJoin().gem();
}
/**
* @notice Returns the address of the Dai token
* @return The address of the Dai token.
*/
function daiToken() public returns (GemLike) {
return scdMcdMigration.daiJoin().dai();
}
} | * @notice Emits the Committed event for the current open draw./ | function emitCommitted() internal {
uint256 drawId = currentOpenDrawId();
emit Committed(drawId);
if (address(poolToken) != address(0)) {
poolToken.poolMint(openSupply());
}
}
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/**
*Submitted for verification at Etherscan.io on 2022-04-28
*/
// SPDX-License-Identifier: MIT
// @title GangsterSapiens NFT Smart Contract
// @authors Nathan Smyth & Jon Leveille
// @notice This contract provides 6'666 Gangster Sapiens NFTs
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
pragma solidity ^0.8.7;
contract GangsterSapiens is ERC721Enumerable, Ownable{
using Strings for uint256;
/// @notice base attributes of the contract*/
string public baseExtension = ".json";
string public baseURI;
uint256 public tokenCounter;
string private revealURI;
bool private revealSingle = true;
string public contractURI;
bool public paused = true;
bool public revealed = false;
/// @notice minting prices
uint256 public mintingPrice = 0.08 ether;
uint256 public whitelistPrice = 0.08 ether;
/// @notice supply
uint256 public maxSupply = 6666;
/// @notice whitelist params
bool public whitelistActive = false;
uint256 public whitelistSize = 0;
mapping(address => bool) public whitelist;
/// @notice airdrop params
uint256 public airdropSize = 0;
mapping(address => bool) public airdropAllowed;
mapping(address => bool) airdropClaimed;
/// @notice events to be logged
/// @dev only logging according to third party business interests
event mintNFTCalled(address indexed caller, address indexed receiver, uint256 tokenID);
event mintWhitelistNFTCalled(address indexed caller, address indexed receiver, uint256 tokenID);
event mintAirdropCalled(address indexed caller, address indexed receiver, uint256 tokenID);
event whitelistStateChanged(bool newValue);
event pausedChanged(bool newValue);
event mintingPriceChanged(uint256 oldPrice, uint256 newPrice);
event whitelistPriceChanged(uint256 oldPrice, uint256 newPrice);
/// @notice constructor
/// @param _newBaseURI for the base URI connection
/// @param _newRevealURI for the prevereal uri
/// @param _newContractURI for the contract Opensea data connection
constructor(string memory _newBaseURI, string memory _newRevealURI, string memory _newContractURI) ERC721("Gangster Sapiens", "GSAP") {
tokenCounter = 0;
baseURI = _newBaseURI;
contractURI = _newContractURI;
revealURI = _newRevealURI;
}
/// @notice public minting. Free for contract owner
/// @param _to addres to whom the NFT will be minted. Usable for single Airdrops
/// @param _mintAmount amount of NFTs that should be minted.
function mintNFT(address _to, uint256 _mintAmount) public payable {
require(!paused, "Contract is paused!");
require(whitelistActive == false, "Only Whitelist minting is allowed");
require(tokenCounter + _mintAmount <= maxSupply, "Maximum of possible NFTs is reached");
require(_mintAmount > 0, "At least one token must be minted");
if(msg.sender != owner()) {
require(msg.value >= mintingPrice * _mintAmount, "Payed Ether is too less for minting.");
}
for (uint256 i = 1; i <= _mintAmount; i++) {
tokenCounter++;
_safeMint(_to, tokenCounter);
emit mintNFTCalled(msg.sender, _to, tokenCounter);
}
}
/// @notice whitelist minting. Free for contract owner
/// @param _to addres to whom the NFT will be minted
/// @param _mintAmount amount of NFTs that should be minted.
function mintWhitelistNFT(address _to, uint256 _mintAmount) public payable {
require(!paused, "Contract is paused!");
require(whitelistActive == true, "Whitelistminting not activated");
require(tokenCounter + _mintAmount <= maxSupply, "Maximum of possible NFTs is reached");
require(_mintAmount > 0, "At least one token must be minted");
require(whitelist[msg.sender], "You are not whitelisted!");
if(msg.sender != owner()) {
require(msg.value >= whitelistPrice * _mintAmount, "Payed Ether is too less for minting.");
}
for (uint256 i = 1; i <= _mintAmount; i++) {
tokenCounter++;
_safeMint(_to, tokenCounter);
emit mintWhitelistNFTCalled(msg.sender, _to, tokenCounter);
}
}
/// @notice read URI of Token for Metadata
/// @dev overrides the erc721 standard because of the reveal mechanic. If revealSingle is true, it returns a url to the single point NFT. Else generic reply.
/// @param _tokenId represents the ID of the NFT to view
function tokenURI(uint256 _tokenId) public view virtual override
returns (string memory)
{
require(_exists(_tokenId), "ERC721Metadata: URI query for nonexistent token");
if(revealed) {
return string(abi.encodePacked(baseURI, _tokenId.toString(), baseExtension));
} else {
if(revealSingle) {
return string(abi.encodePacked(revealURI, _tokenId.toString(), baseExtension));
} else {
return string(revealURI);
}
}
}
/// @notice get NFTs of specific address
/// @param _owner Wallet address to input. Not to be confused with the Ownable owner
/// @return tokenIds as a list of all the NFT ids the wallet owns
function getNFTContract(address _owner) public view returns (uint256[] memory) {
uint256 ownerTokenCount = balanceOf(_owner);
uint256[] memory tokenIds = new uint256[](ownerTokenCount);
for (uint256 i; i < ownerTokenCount; i++) {
tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
}
return tokenIds;
}
/// @notice only owner functions
/// @notice sets minting price
/// @param _newPrice represents the new price in WEI format
function setmintingPrice(uint256 _newPrice) public onlyOwner {
emit mintingPriceChanged(mintingPrice, _newPrice);
mintingPrice = _newPrice;
}
/// @notice sets whitelist minting price
/// @param _newPrice represents the new price in WEI format
function setwhitelistPrice(uint256 _newPrice) public onlyOwner {
emit whitelistPriceChanged(whitelistPrice, _newPrice);
whitelistPrice = _newPrice;
}
/// @notice changes base uri
/// @param _newBaseURI a string holding a URL
/// @dev The _newBaseURI must contain a / at the end
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
/// @notice changes base uri
/// @param _newRevealURI a string holding a URL
/// @dev The _newBaseURI must contain a / at the end
function setRevealURI(string memory _newRevealURI) public onlyOwner {
revealURI = _newRevealURI;
}
/// @notice changes contract uri
/// @param _newContractURI a string holding a URL
/// @dev inupt must be a url to a .json file
function setContractURI(string memory _newContractURI) public onlyOwner {
contractURI = _newContractURI;
}
/// @notice changes extension of base uri
/// @param _newBaseExtension a string holding a file extension. erc721 suggests it to be .json
function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
baseExtension = _newBaseExtension;
}
/// @notice activates whitelist minting
/// @dev normal minting will be blocked as long as whitelistActive = true
function switchWhitelistActive() public onlyOwner {
whitelistActive = !whitelistActive;
}
/// @notice switches paused
/// @dev normal and whitelist minting is stopped. Reserved minting is still possible
function switchPaused() public onlyOwner {
paused = !paused;
emit pausedChanged(paused);
}
/// @notice switches revealed
function switchRevealed() public onlyOwner {
revealed = !revealed;
}
/// @notice switches revealed type. True = contract returns url as revealURI/tokenID.json. False = contract returns url as revealURI.
function switchRevealSingle() public onlyOwner {
revealSingle = !revealSingle;
}
/// @notice withdraws all MATIC from the contract to the owner wallet
function withdraw() public payable onlyOwner {
require(payable(msg.sender).send(address(this).balance));
}
/// @notice Uploads a list of wallet addresses and saves it in the whitelist array
/// @param accounts as a list of addresses
/// @return uint256 returns the amount of addresses successfully saved
/// @dev this is a very heavy function consuming a lot of gas. Limit set to 200 per transaction
function whitelistImport(address[] memory accounts) public onlyOwner returns (uint256) {
uint256 taskCounter = 0;
for (uint256 i = 0; i < accounts.length; i++) {
if(!whitelist[accounts[i]]) {
whitelist[accounts[i]] = true;
whitelistSize++;
taskCounter++;
}
}
return taskCounter;
}
/// @notice Airdrop function that mints a NFT to all wallet addresses in the input list
/// @param _list as a list of addresses
/// @dev this is a very heavy function consuming a lot of gas. Limit set to 200 per transaction
function airdopNFT(address[] memory _list) public onlyOwner {
for(uint256 i; i < _list.length; i++) {
mintNFT(_list[i], 1);
}
}
/// @notice Uploads a list of wallet addresses and saves it in the whitelist array
/// @param accounts as a list of addresses
/// @return uint256 returns the amount of addresses successfully saved
/// @dev this is a very heavy function consuming a lot of gas. Limit set to 200 per transaction
function airdropImport(address[] memory accounts) public onlyOwner returns (uint256) {
uint256 taskCounter = 0;
for (uint256 i = 0; i < accounts.length; i++) {
if(!airdropAllowed[accounts[i]]) {
airdropAllowed[accounts[i]] = true;
airdropSize++;
taskCounter++;
}
}
return taskCounter;
}
/// @notice function for users to mint their airdrop NFT
function mintAirdrop() public {
require(!paused, "Contract is paused!");
require(tokenCounter + 1 <= maxSupply, "Maximum of possible NFTs is reached");
require(!airdropClaimed[msg.sender], "You have already claimed your Airdrop");
require(airdropAllowed[msg.sender], "Your are not allowed for the Airdrop");
tokenCounter++;
airdropClaimed[msg.sender] = true;
_safeMint(msg.sender, tokenCounter);
emit mintNFTCalled(msg.sender, msg.sender, tokenCounter);
}
} | @notice read URI of Token for Metadata @dev overrides the erc721 standard because of the reveal mechanic. If revealSingle is true, it returns a url to the single point NFT. Else generic reply. @param _tokenId represents the ID of the NFT to view | function tokenURI(uint256 _tokenId) public view virtual override
returns (string memory)
{
require(_exists(_tokenId), "ERC721Metadata: URI query for nonexistent token");
if(revealed) {
return string(abi.encodePacked(baseURI, _tokenId.toString(), baseExtension));
if(revealSingle) {
return string(abi.encodePacked(revealURI, _tokenId.toString(), baseExtension));
return string(revealURI);
}
}
}
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pragma solidity ^0.4.24;
contract GNSlib {
constructor() public {
}
/** @notice Verifies name validness. Name should not contain dots (".")
*/
function isValidName(
string _name)
pure
public
returns (bool)
{
bytes memory nameInByteArray = bytes(_name);
for (uint128 i = 0; i < nameInByteArray.length; i++)
if (nameInByteArray[i] == '.')
return false;
return true;
}
/** @notice Verifies validness of part of record
*/
function isValidString(
bytes _str,
uint32 _offset,
uint32 _length)
pure
public
returns (bool)
{
if (_str.length < _offset + _length)
return false;
for (uint128 i = _offset; i < _length; i++)
if (_str[i] == 0)
return false;
return true;
}
/** @notice Verifies is record name exists
*/
function bytesToUint32LE(
bytes _what,
uint32 _offset)
pure
public
returns (uint32)
{
require(_what.length >= _offset + 4);
return uint32(_what[_offset + 3])
| (uint32(_what[_offset + 2]) << 8)
| (uint32(_what[_offset + 1]) << 16)
| (uint32(_what[_offset + 0]) << 24);
}
/**
* If type of protocol not in range for custom or not unknown type, the function returns false
*/
function isValidRecord(
bytes _rawRecord)
pure
public
returns (bool)
{
if (_rawRecord.length <= 1)
return false;
uint8 typeOfRecord = uint8(_rawRecord[0]);
if (typeOfRecord >= 64 && typeOfRecord <= 255)
return true;
if (typeOfRecord == 0) //fixme you can't check every type of record onchain, so there is no need to do that
return isValidFDNSRecord(_rawRecord);
else if (typeOfRecord == 1)
return isValidIPv4Record(_rawRecord);
else if (typeOfRecord == 2)
return isValidIPv6Record(_rawRecord);
else if (typeOfRecord == 3)
return isValidDNSRecord(_rawRecord);
return false;
}
function isValidFDNSRecord(
bytes _rawRecord)
pure
public
returns (bool)
{
uint8 typeOfRecord = uint8(_rawRecord[0]);
if (typeOfRecord != 0)
return false;
if (_rawRecord.length < 5)
return false;
if (uint32(_rawRecord.length - 5) != bytesToUint32LE(_rawRecord, 1))
return false;
return true;
}
function isValidIPv4Record(
bytes _rawRecord)
pure
public
returns (bool)
{
uint8 typeOfRecord = uint8(_rawRecord[0]);
if (typeOfRecord != 1)
return false;
if (_rawRecord.length != 5)
return false;
return true;
}
function isValidIPv6Record(
bytes _rawRecord)
pure
public
returns (bool)
{
uint8 typeOfRecord = uint8(_rawRecord[0]);
if (typeOfRecord != 2)
return false;
if (_rawRecord.length != 17)
return false;
return true;
}
function isValidDNSRecord(
bytes _rawRecord)
pure
public
returns (bool)
{
uint8 typeOfRecord = uint8(_rawRecord[0]);
if (typeOfRecord != 3)
return false;
if (!isValidString(_rawRecord, 1, uint32(_rawRecord.length - 1)))
return false;
return true;
}
}
| * @notice Verifies validness of part of record/ | function isValidString(
bytes _str,
uint32 _offset,
uint32 _length)
pure
public
returns (bool)
{
if (_str.length < _offset + _length)
return false;
for (uint128 i = _offset; i < _length; i++)
if (_str[i] == 0)
return false;
return true;
}
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pragma solidity ^0.4.25;
pragma experimental ABIEncoderV2;
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
/**
* @title Modifiable
* @notice A contract with basic modifiers
*/
contract Modifiable {
//
// Modifiers
// -----------------------------------------------------------------------------------------------------------------
modifier notNullAddress(address _address) {
require(_address != address(0));
_;
}
modifier notThisAddress(address _address) {
require(_address != address(this));
_;
}
modifier notNullOrThisAddress(address _address) {
require(_address != address(0));
require(_address != address(this));
_;
}
modifier notSameAddresses(address _address1, address _address2) {
if (_address1 != _address2)
_;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
/**
* @title SelfDestructible
* @notice Contract that allows for self-destruction
*/
contract SelfDestructible {
//
// Variables
// -----------------------------------------------------------------------------------------------------------------
bool public selfDestructionDisabled;
//
// Events
// -----------------------------------------------------------------------------------------------------------------
event SelfDestructionDisabledEvent(address wallet);
event TriggerSelfDestructionEvent(address wallet);
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
/// @notice Get the address of the destructor role
function destructor()
public
view
returns (address);
/// @notice Disable self-destruction of this contract
/// @dev This operation can not be undone
function disableSelfDestruction()
public
{
// Require that sender is the assigned destructor
require(destructor() == msg.sender);
// Disable self-destruction
selfDestructionDisabled = true;
// Emit event
emit SelfDestructionDisabledEvent(msg.sender);
}
/// @notice Destroy this contract
function triggerSelfDestruction()
public
{
// Require that sender is the assigned destructor
require(destructor() == msg.sender);
// Require that self-destruction has not been disabled
require(!selfDestructionDisabled);
// Emit event
emit TriggerSelfDestructionEvent(msg.sender);
// Self-destruct and reward destructor
selfdestruct(msg.sender);
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
/**
* @title Ownable
* @notice A modifiable that has ownership roles
*/
contract Ownable is Modifiable, SelfDestructible {
//
// Variables
// -----------------------------------------------------------------------------------------------------------------
address public deployer;
address public operator;
//
// Events
// -----------------------------------------------------------------------------------------------------------------
event SetDeployerEvent(address oldDeployer, address newDeployer);
event SetOperatorEvent(address oldOperator, address newOperator);
//
// Constructor
// -----------------------------------------------------------------------------------------------------------------
constructor(address _deployer) internal notNullOrThisAddress(_deployer) {
deployer = _deployer;
operator = _deployer;
}
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
/// @notice Return the address that is able to initiate self-destruction
function destructor()
public
view
returns (address)
{
return deployer;
}
/// @notice Set the deployer of this contract
/// @param newDeployer The address of the new deployer
function setDeployer(address newDeployer)
public
onlyDeployer
notNullOrThisAddress(newDeployer)
{
if (newDeployer != deployer) {
// Set new deployer
address oldDeployer = deployer;
deployer = newDeployer;
// Emit event
emit SetDeployerEvent(oldDeployer, newDeployer);
}
}
/// @notice Set the operator of this contract
/// @param newOperator The address of the new operator
function setOperator(address newOperator)
public
onlyOperator
notNullOrThisAddress(newOperator)
{
if (newOperator != operator) {
// Set new operator
address oldOperator = operator;
operator = newOperator;
// Emit event
emit SetOperatorEvent(oldOperator, newOperator);
}
}
/// @notice Gauge whether message sender is deployer or not
/// @return true if msg.sender is deployer, else false
function isDeployer()
internal
view
returns (bool)
{
return msg.sender == deployer;
}
/// @notice Gauge whether message sender is operator or not
/// @return true if msg.sender is operator, else false
function isOperator()
internal
view
returns (bool)
{
return msg.sender == operator;
}
/// @notice Gauge whether message sender is operator or deployer on the one hand, or none of these on these on
/// on the other hand
/// @return true if msg.sender is operator, else false
function isDeployerOrOperator()
internal
view
returns (bool)
{
return isDeployer() || isOperator();
}
// Modifiers
// -----------------------------------------------------------------------------------------------------------------
modifier onlyDeployer() {
require(isDeployer());
_;
}
modifier notDeployer() {
require(!isDeployer());
_;
}
modifier onlyOperator() {
require(isOperator());
_;
}
modifier notOperator() {
require(!isOperator());
_;
}
modifier onlyDeployerOrOperator() {
require(isDeployerOrOperator());
_;
}
modifier notDeployerOrOperator() {
require(!isDeployerOrOperator());
_;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
/**
* @title Servable
* @notice An ownable that contains registered services and their actions
*/
contract Servable is Ownable {
//
// Types
// -----------------------------------------------------------------------------------------------------------------
struct ServiceInfo {
bool registered;
uint256 activationTimestamp;
mapping(bytes32 => bool) actionsEnabledMap;
bytes32[] actionsList;
}
//
// Variables
// -----------------------------------------------------------------------------------------------------------------
mapping(address => ServiceInfo) internal registeredServicesMap;
uint256 public serviceActivationTimeout;
//
// Events
// -----------------------------------------------------------------------------------------------------------------
event ServiceActivationTimeoutEvent(uint256 timeoutInSeconds);
event RegisterServiceEvent(address service);
event RegisterServiceDeferredEvent(address service, uint256 timeout);
event DeregisterServiceEvent(address service);
event EnableServiceActionEvent(address service, string action);
event DisableServiceActionEvent(address service, string action);
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
/// @notice Set the service activation timeout
/// @param timeoutInSeconds The set timeout in unit of seconds
function setServiceActivationTimeout(uint256 timeoutInSeconds)
public
onlyDeployer
{
serviceActivationTimeout = timeoutInSeconds;
// Emit event
emit ServiceActivationTimeoutEvent(timeoutInSeconds);
}
/// @notice Register a service contract whose activation is immediate
/// @param service The address of the service contract to be registered
function registerService(address service)
public
onlyDeployer
notNullOrThisAddress(service)
{
_registerService(service, 0);
// Emit event
emit RegisterServiceEvent(service);
}
/// @notice Register a service contract whose activation is deferred by the service activation timeout
/// @param service The address of the service contract to be registered
function registerServiceDeferred(address service)
public
onlyDeployer
notNullOrThisAddress(service)
{
_registerService(service, serviceActivationTimeout);
// Emit event
emit RegisterServiceDeferredEvent(service, serviceActivationTimeout);
}
/// @notice Deregister a service contract
/// @param service The address of the service contract to be deregistered
function deregisterService(address service)
public
onlyDeployer
notNullOrThisAddress(service)
{
require(registeredServicesMap[service].registered);
registeredServicesMap[service].registered = false;
// Emit event
emit DeregisterServiceEvent(service);
}
/// @notice Enable a named action in an already registered service contract
/// @param service The address of the registered service contract
/// @param action The name of the action to be enabled
function enableServiceAction(address service, string action)
public
onlyDeployer
notNullOrThisAddress(service)
{
require(registeredServicesMap[service].registered);
bytes32 actionHash = hashString(action);
require(!registeredServicesMap[service].actionsEnabledMap[actionHash]);
registeredServicesMap[service].actionsEnabledMap[actionHash] = true;
registeredServicesMap[service].actionsList.push(actionHash);
// Emit event
emit EnableServiceActionEvent(service, action);
}
/// @notice Enable a named action in a service contract
/// @param service The address of the service contract
/// @param action The name of the action to be disabled
function disableServiceAction(address service, string action)
public
onlyDeployer
notNullOrThisAddress(service)
{
bytes32 actionHash = hashString(action);
require(registeredServicesMap[service].actionsEnabledMap[actionHash]);
registeredServicesMap[service].actionsEnabledMap[actionHash] = false;
// Emit event
emit DisableServiceActionEvent(service, action);
}
/// @notice Gauge whether a service contract is registered
/// @param service The address of the service contract
/// @return true if service is registered, else false
function isRegisteredService(address service)
public
view
returns (bool)
{
return registeredServicesMap[service].registered;
}
/// @notice Gauge whether a service contract is registered and active
/// @param service The address of the service contract
/// @return true if service is registered and activate, else false
function isRegisteredActiveService(address service)
public
view
returns (bool)
{
return isRegisteredService(service) && block.timestamp >= registeredServicesMap[service].activationTimestamp;
}
/// @notice Gauge whether a service contract action is enabled which implies also registered and active
/// @param service The address of the service contract
/// @param action The name of action
function isEnabledServiceAction(address service, string action)
public
view
returns (bool)
{
bytes32 actionHash = hashString(action);
return isRegisteredActiveService(service) && registeredServicesMap[service].actionsEnabledMap[actionHash];
}
//
// Internal functions
// -----------------------------------------------------------------------------------------------------------------
function hashString(string _string)
internal
pure
returns (bytes32)
{
return keccak256(abi.encodePacked(_string));
}
//
// Private functions
// -----------------------------------------------------------------------------------------------------------------
function _registerService(address service, uint256 timeout)
private
{
if (!registeredServicesMap[service].registered) {
registeredServicesMap[service].registered = true;
registeredServicesMap[service].activationTimestamp = block.timestamp + timeout;
}
}
//
// Modifiers
// -----------------------------------------------------------------------------------------------------------------
modifier onlyActiveService() {
require(isRegisteredActiveService(msg.sender));
_;
}
modifier onlyEnabledServiceAction(string action) {
require(isEnabledServiceAction(msg.sender, action));
_;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS based on Open-Zeppelin's SafeMath library
*/
/**
* @title SafeMathIntLib
* @dev Math operations with safety checks that throw on error
*/
library SafeMathIntLib {
int256 constant INT256_MIN = int256((uint256(1) << 255));
int256 constant INT256_MAX = int256(~((uint256(1) << 255)));
//
//Functions below accept positive and negative integers and result must not overflow.
//
function div(int256 a, int256 b)
internal
pure
returns (int256)
{
require(a != INT256_MIN || b != - 1);
return a / b;
}
function mul(int256 a, int256 b)
internal
pure
returns (int256)
{
require(a != - 1 || b != INT256_MIN);
// overflow
require(b != - 1 || a != INT256_MIN);
// overflow
int256 c = a * b;
require((b == 0) || (c / b == a));
return c;
}
function sub(int256 a, int256 b)
internal
pure
returns (int256)
{
require((b >= 0 && a - b <= a) || (b < 0 && a - b > a));
return a - b;
}
function add(int256 a, int256 b)
internal
pure
returns (int256)
{
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a));
return c;
}
//
//Functions below only accept positive integers and result must be greater or equal to zero too.
//
function div_nn(int256 a, int256 b)
internal
pure
returns (int256)
{
require(a >= 0 && b > 0);
return a / b;
}
function mul_nn(int256 a, int256 b)
internal
pure
returns (int256)
{
require(a >= 0 && b >= 0);
int256 c = a * b;
require(a == 0 || c / a == b);
require(c >= 0);
return c;
}
function sub_nn(int256 a, int256 b)
internal
pure
returns (int256)
{
require(a >= 0 && b >= 0 && b <= a);
return a - b;
}
function add_nn(int256 a, int256 b)
internal
pure
returns (int256)
{
require(a >= 0 && b >= 0);
int256 c = a + b;
require(c >= a);
return c;
}
//
//Conversion and validation functions.
//
function abs(int256 a)
public
pure
returns (int256)
{
return a < 0 ? neg(a) : a;
}
function neg(int256 a)
public
pure
returns (int256)
{
return mul(a, - 1);
}
function toNonZeroInt256(uint256 a)
public
pure
returns (int256)
{
require(a > 0 && a < (uint256(1) << 255));
return int256(a);
}
function toInt256(uint256 a)
public
pure
returns (int256)
{
require(a >= 0 && a < (uint256(1) << 255));
return int256(a);
}
function toUInt256(int256 a)
public
pure
returns (uint256)
{
require(a >= 0);
return uint256(a);
}
function isNonZeroPositiveInt256(int256 a)
public
pure
returns (bool)
{
return (a > 0);
}
function isPositiveInt256(int256 a)
public
pure
returns (bool)
{
return (a >= 0);
}
function isNonZeroNegativeInt256(int256 a)
public
pure
returns (bool)
{
return (a < 0);
}
function isNegativeInt256(int256 a)
public
pure
returns (bool)
{
return (a <= 0);
}
//
//Clamping functions.
//
function clamp(int256 a, int256 min, int256 max)
public
pure
returns (int256)
{
if (a < min)
return min;
return (a > max) ? max : a;
}
function clampMin(int256 a, int256 min)
public
pure
returns (int256)
{
return (a < min) ? min : a;
}
function clampMax(int256 a, int256 max)
public
pure
returns (int256)
{
return (a > max) ? max : a;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
library BlockNumbUintsLib {
//
// Structures
// -----------------------------------------------------------------------------------------------------------------
struct Entry {
uint256 blockNumber;
uint256 value;
}
struct BlockNumbUints {
Entry[] entries;
}
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
function currentValue(BlockNumbUints storage self)
internal
view
returns (uint256)
{
return valueAt(self, block.number);
}
function currentEntry(BlockNumbUints storage self)
internal
view
returns (Entry)
{
return entryAt(self, block.number);
}
function valueAt(BlockNumbUints storage self, uint256 _blockNumber)
internal
view
returns (uint256)
{
return entryAt(self, _blockNumber).value;
}
function entryAt(BlockNumbUints storage self, uint256 _blockNumber)
internal
view
returns (Entry)
{
return self.entries[indexByBlockNumber(self, _blockNumber)];
}
function addEntry(BlockNumbUints storage self, uint256 blockNumber, uint256 value)
internal
{
require(
0 == self.entries.length ||
blockNumber > self.entries[self.entries.length - 1].blockNumber
);
self.entries.push(Entry(blockNumber, value));
}
function count(BlockNumbUints storage self)
internal
view
returns (uint256)
{
return self.entries.length;
}
function entries(BlockNumbUints storage self)
internal
view
returns (Entry[])
{
return self.entries;
}
function indexByBlockNumber(BlockNumbUints storage self, uint256 blockNumber)
internal
view
returns (uint256)
{
require(0 < self.entries.length);
for (uint256 i = self.entries.length - 1; i >= 0; i--)
if (blockNumber >= self.entries[i].blockNumber)
return i;
revert();
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
library BlockNumbIntsLib {
//
// Structures
// -----------------------------------------------------------------------------------------------------------------
struct Entry {
uint256 blockNumber;
int256 value;
}
struct BlockNumbInts {
Entry[] entries;
}
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
function currentValue(BlockNumbInts storage self)
internal
view
returns (int256)
{
return valueAt(self, block.number);
}
function currentEntry(BlockNumbInts storage self)
internal
view
returns (Entry)
{
return entryAt(self, block.number);
}
function valueAt(BlockNumbInts storage self, uint256 _blockNumber)
internal
view
returns (int256)
{
return entryAt(self, _blockNumber).value;
}
function entryAt(BlockNumbInts storage self, uint256 _blockNumber)
internal
view
returns (Entry)
{
return self.entries[indexByBlockNumber(self, _blockNumber)];
}
function addEntry(BlockNumbInts storage self, uint256 blockNumber, int256 value)
internal
{
require(
0 == self.entries.length ||
blockNumber > self.entries[self.entries.length - 1].blockNumber
);
self.entries.push(Entry(blockNumber, value));
}
function count(BlockNumbInts storage self)
internal
view
returns (uint256)
{
return self.entries.length;
}
function entries(BlockNumbInts storage self)
internal
view
returns (Entry[])
{
return self.entries;
}
function indexByBlockNumber(BlockNumbInts storage self, uint256 blockNumber)
internal
view
returns (uint256)
{
require(0 < self.entries.length);
for (uint256 i = self.entries.length - 1; i >= 0; i--)
if (blockNumber >= self.entries[i].blockNumber)
return i;
revert();
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
library ConstantsLib {
// Get the fraction that represents the entirety, equivalent of 100%
function PARTS_PER()
public
pure
returns (int256)
{
return 1e18;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
library BlockNumbDisdIntsLib {
using SafeMathIntLib for int256;
//
// Structures
// -----------------------------------------------------------------------------------------------------------------
struct Discount {
int256 tier;
int256 value;
}
struct Entry {
uint256 blockNumber;
int256 nominal;
Discount[] discounts;
}
struct BlockNumbDisdInts {
Entry[] entries;
}
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
function currentNominalValue(BlockNumbDisdInts storage self)
internal
view
returns (int256)
{
return nominalValueAt(self, block.number);
}
function currentDiscountedValue(BlockNumbDisdInts storage self, int256 tier)
internal
view
returns (int256)
{
return discountedValueAt(self, block.number, tier);
}
function currentEntry(BlockNumbDisdInts storage self)
internal
view
returns (Entry)
{
return entryAt(self, block.number);
}
function nominalValueAt(BlockNumbDisdInts storage self, uint256 _blockNumber)
internal
view
returns (int256)
{
return entryAt(self, _blockNumber).nominal;
}
function discountedValueAt(BlockNumbDisdInts storage self, uint256 _blockNumber, int256 tier)
internal
view
returns (int256)
{
Entry memory entry = entryAt(self, _blockNumber);
if (0 < entry.discounts.length) {
uint256 index = indexByTier(entry.discounts, tier);
if (0 < index)
return entry.nominal.mul(
ConstantsLib.PARTS_PER().sub(entry.discounts[index - 1].value)
).div(
ConstantsLib.PARTS_PER()
);
else
return entry.nominal;
} else
return entry.nominal;
}
function entryAt(BlockNumbDisdInts storage self, uint256 _blockNumber)
internal
view
returns (Entry)
{
return self.entries[indexByBlockNumber(self, _blockNumber)];
}
function addNominalEntry(BlockNumbDisdInts storage self, uint256 blockNumber, int256 nominal)
internal
{
require(
0 == self.entries.length ||
blockNumber > self.entries[self.entries.length - 1].blockNumber
);
self.entries.length++;
Entry storage entry = self.entries[self.entries.length - 1];
entry.blockNumber = blockNumber;
entry.nominal = nominal;
}
function addDiscountedEntry(BlockNumbDisdInts storage self, uint256 blockNumber, int256 nominal,
int256[] discountTiers, int256[] discountValues)
internal
{
require(discountTiers.length == discountValues.length);
addNominalEntry(self, blockNumber, nominal);
Entry storage entry = self.entries[self.entries.length - 1];
for (uint256 i = 0; i < discountTiers.length; i++)
entry.discounts.push(Discount(discountTiers[i], discountValues[i]));
}
function count(BlockNumbDisdInts storage self)
internal
view
returns (uint256)
{
return self.entries.length;
}
function entries(BlockNumbDisdInts storage self)
internal
view
returns (Entry[])
{
return self.entries;
}
function indexByBlockNumber(BlockNumbDisdInts storage self, uint256 blockNumber)
internal
view
returns (uint256)
{
require(0 < self.entries.length);
for (uint256 i = self.entries.length - 1; i >= 0; i--)
if (blockNumber >= self.entries[i].blockNumber)
return i;
revert();
}
/// @dev The index returned here is 1-based
function indexByTier(Discount[] discounts, int256 tier)
internal
pure
returns (uint256)
{
require(0 < discounts.length);
for (uint256 i = discounts.length; i > 0; i--)
if (tier >= discounts[i - 1].tier)
return i;
return 0;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
/**
* @title MonetaryTypesLib
* @dev Monetary data types
*/
library MonetaryTypesLib {
//
// Structures
// -----------------------------------------------------------------------------------------------------------------
struct Currency {
address ct;
uint256 id;
}
struct Figure {
int256 amount;
Currency currency;
}
struct NoncedAmount {
uint256 nonce;
int256 amount;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
library BlockNumbReferenceCurrenciesLib {
//
// Structures
// -----------------------------------------------------------------------------------------------------------------
struct Entry {
uint256 blockNumber;
MonetaryTypesLib.Currency currency;
}
struct BlockNumbReferenceCurrencies {
mapping(address => mapping(uint256 => Entry[])) entriesByCurrency;
}
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
function currentCurrency(BlockNumbReferenceCurrencies storage self, MonetaryTypesLib.Currency referenceCurrency)
internal
view
returns (MonetaryTypesLib.Currency storage)
{
return currencyAt(self, referenceCurrency, block.number);
}
function currentEntry(BlockNumbReferenceCurrencies storage self, MonetaryTypesLib.Currency referenceCurrency)
internal
view
returns (Entry storage)
{
return entryAt(self, referenceCurrency, block.number);
}
function currencyAt(BlockNumbReferenceCurrencies storage self, MonetaryTypesLib.Currency referenceCurrency,
uint256 _blockNumber)
internal
view
returns (MonetaryTypesLib.Currency storage)
{
return entryAt(self, referenceCurrency, _blockNumber).currency;
}
function entryAt(BlockNumbReferenceCurrencies storage self, MonetaryTypesLib.Currency referenceCurrency,
uint256 _blockNumber)
internal
view
returns (Entry storage)
{
return self.entriesByCurrency[referenceCurrency.ct][referenceCurrency.id][indexByBlockNumber(self, referenceCurrency, _blockNumber)];
}
function addEntry(BlockNumbReferenceCurrencies storage self, uint256 blockNumber,
MonetaryTypesLib.Currency referenceCurrency, MonetaryTypesLib.Currency currency)
internal
{
require(
0 == self.entriesByCurrency[referenceCurrency.ct][referenceCurrency.id].length ||
blockNumber > self.entriesByCurrency[referenceCurrency.ct][referenceCurrency.id][self.entriesByCurrency[referenceCurrency.ct][referenceCurrency.id].length - 1].blockNumber
);
self.entriesByCurrency[referenceCurrency.ct][referenceCurrency.id].push(Entry(blockNumber, currency));
}
function count(BlockNumbReferenceCurrencies storage self, MonetaryTypesLib.Currency referenceCurrency)
internal
view
returns (uint256)
{
return self.entriesByCurrency[referenceCurrency.ct][referenceCurrency.id].length;
}
function entriesByCurrency(BlockNumbReferenceCurrencies storage self, MonetaryTypesLib.Currency referenceCurrency)
internal
view
returns (Entry[] storage)
{
return self.entriesByCurrency[referenceCurrency.ct][referenceCurrency.id];
}
function indexByBlockNumber(BlockNumbReferenceCurrencies storage self, MonetaryTypesLib.Currency referenceCurrency, uint256 blockNumber)
internal
view
returns (uint256)
{
require(0 < self.entriesByCurrency[referenceCurrency.ct][referenceCurrency.id].length);
for (uint256 i = self.entriesByCurrency[referenceCurrency.ct][referenceCurrency.id].length - 1; i >= 0; i--)
if (blockNumber >= self.entriesByCurrency[referenceCurrency.ct][referenceCurrency.id][i].blockNumber)
return i;
revert();
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
library BlockNumbFiguresLib {
//
// Structures
// -----------------------------------------------------------------------------------------------------------------
struct Entry {
uint256 blockNumber;
MonetaryTypesLib.Figure value;
}
struct BlockNumbFigures {
Entry[] entries;
}
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
function currentValue(BlockNumbFigures storage self)
internal
view
returns (MonetaryTypesLib.Figure storage)
{
return valueAt(self, block.number);
}
function currentEntry(BlockNumbFigures storage self)
internal
view
returns (Entry storage)
{
return entryAt(self, block.number);
}
function valueAt(BlockNumbFigures storage self, uint256 _blockNumber)
internal
view
returns (MonetaryTypesLib.Figure storage)
{
return entryAt(self, _blockNumber).value;
}
function entryAt(BlockNumbFigures storage self, uint256 _blockNumber)
internal
view
returns (Entry storage)
{
return self.entries[indexByBlockNumber(self, _blockNumber)];
}
function addEntry(BlockNumbFigures storage self, uint256 blockNumber, MonetaryTypesLib.Figure value)
internal
{
require(
0 == self.entries.length ||
blockNumber > self.entries[self.entries.length - 1].blockNumber
);
self.entries.push(Entry(blockNumber, value));
}
function count(BlockNumbFigures storage self)
internal
view
returns (uint256)
{
return self.entries.length;
}
function entries(BlockNumbFigures storage self)
internal
view
returns (Entry[] storage)
{
return self.entries;
}
function indexByBlockNumber(BlockNumbFigures storage self, uint256 blockNumber)
internal
view
returns (uint256)
{
require(0 < self.entries.length);
for (uint256 i = self.entries.length - 1; i >= 0; i--)
if (blockNumber >= self.entries[i].blockNumber)
return i;
revert();
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
/**
* @title Configuration
* @notice An oracle for configurations values
*/
contract Configuration is Modifiable, Ownable, Servable {
using SafeMathIntLib for int256;
using BlockNumbUintsLib for BlockNumbUintsLib.BlockNumbUints;
using BlockNumbIntsLib for BlockNumbIntsLib.BlockNumbInts;
using BlockNumbDisdIntsLib for BlockNumbDisdIntsLib.BlockNumbDisdInts;
using BlockNumbReferenceCurrenciesLib for BlockNumbReferenceCurrenciesLib.BlockNumbReferenceCurrencies;
using BlockNumbFiguresLib for BlockNumbFiguresLib.BlockNumbFigures;
//
// Constants
// -----------------------------------------------------------------------------------------------------------------
string constant public OPERATIONAL_MODE_ACTION = "operational_mode";
//
// Enums
// -----------------------------------------------------------------------------------------------------------------
enum OperationalMode {Normal, Exit}
//
// Variables
// -----------------------------------------------------------------------------------------------------------------
OperationalMode public operationalMode = OperationalMode.Normal;
BlockNumbUintsLib.BlockNumbUints private updateDelayBlocksByBlockNumber;
BlockNumbUintsLib.BlockNumbUints private confirmationBlocksByBlockNumber;
BlockNumbDisdIntsLib.BlockNumbDisdInts private tradeMakerFeeByBlockNumber;
BlockNumbDisdIntsLib.BlockNumbDisdInts private tradeTakerFeeByBlockNumber;
BlockNumbDisdIntsLib.BlockNumbDisdInts private paymentFeeByBlockNumber;
mapping(address => mapping(uint256 => BlockNumbDisdIntsLib.BlockNumbDisdInts)) private currencyPaymentFeeByBlockNumber;
BlockNumbIntsLib.BlockNumbInts private tradeMakerMinimumFeeByBlockNumber;
BlockNumbIntsLib.BlockNumbInts private tradeTakerMinimumFeeByBlockNumber;
BlockNumbIntsLib.BlockNumbInts private paymentMinimumFeeByBlockNumber;
mapping(address => mapping(uint256 => BlockNumbIntsLib.BlockNumbInts)) private currencyPaymentMinimumFeeByBlockNumber;
BlockNumbReferenceCurrenciesLib.BlockNumbReferenceCurrencies private feeCurrencyByCurrencyBlockNumber;
BlockNumbUintsLib.BlockNumbUints private walletLockTimeoutByBlockNumber;
BlockNumbUintsLib.BlockNumbUints private cancelOrderChallengeTimeoutByBlockNumber;
BlockNumbUintsLib.BlockNumbUints private settlementChallengeTimeoutByBlockNumber;
BlockNumbUintsLib.BlockNumbUints private fraudStakeFractionByBlockNumber;
BlockNumbUintsLib.BlockNumbUints private walletSettlementStakeFractionByBlockNumber;
BlockNumbUintsLib.BlockNumbUints private operatorSettlementStakeFractionByBlockNumber;
BlockNumbFiguresLib.BlockNumbFigures private operatorSettlementStakeByBlockNumber;
uint256 public earliestSettlementBlockNumber;
bool public earliestSettlementBlockNumberUpdateDisabled;
//
// Events
// -----------------------------------------------------------------------------------------------------------------
event SetOperationalModeExitEvent();
event SetUpdateDelayBlocksEvent(uint256 fromBlockNumber, uint256 newBlocks);
event SetConfirmationBlocksEvent(uint256 fromBlockNumber, uint256 newBlocks);
event SetTradeMakerFeeEvent(uint256 fromBlockNumber, int256 nominal, int256[] discountTiers, int256[] discountValues);
event SetTradeTakerFeeEvent(uint256 fromBlockNumber, int256 nominal, int256[] discountTiers, int256[] discountValues);
event SetPaymentFeeEvent(uint256 fromBlockNumber, int256 nominal, int256[] discountTiers, int256[] discountValues);
event SetCurrencyPaymentFeeEvent(uint256 fromBlockNumber, address currencyCt, uint256 currencyId, int256 nominal,
int256[] discountTiers, int256[] discountValues);
event SetTradeMakerMinimumFeeEvent(uint256 fromBlockNumber, int256 nominal);
event SetTradeTakerMinimumFeeEvent(uint256 fromBlockNumber, int256 nominal);
event SetPaymentMinimumFeeEvent(uint256 fromBlockNumber, int256 nominal);
event SetCurrencyPaymentMinimumFeeEvent(uint256 fromBlockNumber, address currencyCt, uint256 currencyId, int256 nominal);
event SetFeeCurrencyEvent(uint256 fromBlockNumber, address referenceCurrencyCt, uint256 referenceCurrencyId,
address feeCurrencyCt, uint256 feeCurrencyId);
event SetWalletLockTimeoutEvent(uint256 fromBlockNumber, uint256 timeoutInSeconds);
event SetCancelOrderChallengeTimeoutEvent(uint256 fromBlockNumber, uint256 timeoutInSeconds);
event SetSettlementChallengeTimeoutEvent(uint256 fromBlockNumber, uint256 timeoutInSeconds);
event SetWalletSettlementStakeFractionEvent(uint256 fromBlockNumber, uint256 stakeFraction);
event SetOperatorSettlementStakeFractionEvent(uint256 fromBlockNumber, uint256 stakeFraction);
event SetOperatorSettlementStakeEvent(uint256 fromBlockNumber, int256 stakeAmount, address stakeCurrencyCt,
uint256 stakeCurrencyId);
event SetFraudStakeFractionEvent(uint256 fromBlockNumber, uint256 stakeFraction);
event SetEarliestSettlementBlockNumberEvent(uint256 earliestSettlementBlockNumber);
event DisableEarliestSettlementBlockNumberUpdateEvent();
//
// Constructor
// -----------------------------------------------------------------------------------------------------------------
constructor(address deployer) Ownable(deployer) public {
updateDelayBlocksByBlockNumber.addEntry(block.number, 0);
}
//
// Public functions
// -----------------------------------------------------------------------------------------------------------------
/// @notice Set operational mode to Exit
/// @dev Once operational mode is set to Exit it may not be set back to Normal
function setOperationalModeExit()
public
onlyEnabledServiceAction(OPERATIONAL_MODE_ACTION)
{
operationalMode = OperationalMode.Exit;
emit SetOperationalModeExitEvent();
}
/// @notice Return true if operational mode is Normal
function isOperationalModeNormal()
public
view
returns (bool)
{
return OperationalMode.Normal == operationalMode;
}
/// @notice Return true if operational mode is Exit
function isOperationalModeExit()
public
view
returns (bool)
{
return OperationalMode.Exit == operationalMode;
}
/// @notice Get the current value of update delay blocks
/// @return The value of update delay blocks
function updateDelayBlocks()
public
view
returns (uint256)
{
return updateDelayBlocksByBlockNumber.currentValue();
}
/// @notice Get the count of update delay blocks values
/// @return The count of update delay blocks values
function updateDelayBlocksCount()
public
view
returns (uint256)
{
return updateDelayBlocksByBlockNumber.count();
}
/// @notice Set the number of update delay blocks
/// @param fromBlockNumber Block number from which the update applies
/// @param newUpdateDelayBlocks The new update delay blocks value
function setUpdateDelayBlocks(uint256 fromBlockNumber, uint256 newUpdateDelayBlocks)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
updateDelayBlocksByBlockNumber.addEntry(fromBlockNumber, newUpdateDelayBlocks);
emit SetUpdateDelayBlocksEvent(fromBlockNumber, newUpdateDelayBlocks);
}
/// @notice Get the current value of confirmation blocks
/// @return The value of confirmation blocks
function confirmationBlocks()
public
view
returns (uint256)
{
return confirmationBlocksByBlockNumber.currentValue();
}
/// @notice Get the count of confirmation blocks values
/// @return The count of confirmation blocks values
function confirmationBlocksCount()
public
view
returns (uint256)
{
return confirmationBlocksByBlockNumber.count();
}
/// @notice Set the number of confirmation blocks
/// @param fromBlockNumber Block number from which the update applies
/// @param newConfirmationBlocks The new confirmation blocks value
function setConfirmationBlocks(uint256 fromBlockNumber, uint256 newConfirmationBlocks)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
confirmationBlocksByBlockNumber.addEntry(fromBlockNumber, newConfirmationBlocks);
emit SetConfirmationBlocksEvent(fromBlockNumber, newConfirmationBlocks);
}
/// @notice Get number of trade maker fee block number tiers
function tradeMakerFeesCount()
public
view
returns (uint256)
{
return tradeMakerFeeByBlockNumber.count();
}
/// @notice Get trade maker relative fee at given block number, possibly discounted by discount tier value
/// @param blockNumber The concerned block number
/// @param discountTier The concerned discount tier
function tradeMakerFee(uint256 blockNumber, int256 discountTier)
public
view
returns (int256)
{
return tradeMakerFeeByBlockNumber.discountedValueAt(blockNumber, discountTier);
}
/// @notice Set trade maker nominal relative fee and discount tiers and values at given block number tier
/// @param fromBlockNumber Block number from which the update applies
/// @param nominal Nominal relative fee
/// @param nominal Discount tier levels
/// @param nominal Discount values
function setTradeMakerFee(uint256 fromBlockNumber, int256 nominal, int256[] discountTiers, int256[] discountValues)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
tradeMakerFeeByBlockNumber.addDiscountedEntry(fromBlockNumber, nominal, discountTiers, discountValues);
emit SetTradeMakerFeeEvent(fromBlockNumber, nominal, discountTiers, discountValues);
}
/// @notice Get number of trade taker fee block number tiers
function tradeTakerFeesCount()
public
view
returns (uint256)
{
return tradeTakerFeeByBlockNumber.count();
}
/// @notice Get trade taker relative fee at given block number, possibly discounted by discount tier value
/// @param blockNumber The concerned block number
/// @param discountTier The concerned discount tier
function tradeTakerFee(uint256 blockNumber, int256 discountTier)
public
view
returns (int256)
{
return tradeTakerFeeByBlockNumber.discountedValueAt(blockNumber, discountTier);
}
/// @notice Set trade taker nominal relative fee and discount tiers and values at given block number tier
/// @param fromBlockNumber Block number from which the update applies
/// @param nominal Nominal relative fee
/// @param nominal Discount tier levels
/// @param nominal Discount values
function setTradeTakerFee(uint256 fromBlockNumber, int256 nominal, int256[] discountTiers, int256[] discountValues)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
tradeTakerFeeByBlockNumber.addDiscountedEntry(fromBlockNumber, nominal, discountTiers, discountValues);
emit SetTradeTakerFeeEvent(fromBlockNumber, nominal, discountTiers, discountValues);
}
/// @notice Get number of payment fee block number tiers
function paymentFeesCount()
public
view
returns (uint256)
{
return paymentFeeByBlockNumber.count();
}
/// @notice Get payment relative fee at given block number, possibly discounted by discount tier value
/// @param blockNumber The concerned block number
/// @param discountTier The concerned discount tier
function paymentFee(uint256 blockNumber, int256 discountTier)
public
view
returns (int256)
{
return paymentFeeByBlockNumber.discountedValueAt(blockNumber, discountTier);
}
/// @notice Set payment nominal relative fee and discount tiers and values at given block number tier
/// @param fromBlockNumber Block number from which the update applies
/// @param nominal Nominal relative fee
/// @param nominal Discount tier levels
/// @param nominal Discount values
function setPaymentFee(uint256 fromBlockNumber, int256 nominal, int256[] discountTiers, int256[] discountValues)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
paymentFeeByBlockNumber.addDiscountedEntry(fromBlockNumber, nominal, discountTiers, discountValues);
emit SetPaymentFeeEvent(fromBlockNumber, nominal, discountTiers, discountValues);
}
/// @notice Get number of payment fee block number tiers of given currency
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
function currencyPaymentFeesCount(address currencyCt, uint256 currencyId)
public
view
returns (uint256)
{
return currencyPaymentFeeByBlockNumber[currencyCt][currencyId].count();
}
/// @notice Get payment relative fee for given currency at given block number, possibly discounted by
/// discount tier value
/// @param blockNumber The concerned block number
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @param discountTier The concerned discount tier
function currencyPaymentFee(uint256 blockNumber, address currencyCt, uint256 currencyId, int256 discountTier)
public
view
returns (int256)
{
if (0 < currencyPaymentFeeByBlockNumber[currencyCt][currencyId].count())
return currencyPaymentFeeByBlockNumber[currencyCt][currencyId].discountedValueAt(
blockNumber, discountTier
);
else
return paymentFee(blockNumber, discountTier);
}
/// @notice Set payment nominal relative fee and discount tiers and values for given currency at given
/// block number tier
/// @param fromBlockNumber Block number from which the update applies
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @param nominal Nominal relative fee
/// @param nominal Discount tier levels
/// @param nominal Discount values
function setCurrencyPaymentFee(uint256 fromBlockNumber, address currencyCt, uint256 currencyId, int256 nominal,
int256[] discountTiers, int256[] discountValues)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
currencyPaymentFeeByBlockNumber[currencyCt][currencyId].addDiscountedEntry(
fromBlockNumber, nominal, discountTiers, discountValues
);
emit SetCurrencyPaymentFeeEvent(
fromBlockNumber, currencyCt, currencyId, nominal, discountTiers, discountValues
);
}
/// @notice Get number of minimum trade maker fee block number tiers
function tradeMakerMinimumFeesCount()
public
view
returns (uint256)
{
return tradeMakerMinimumFeeByBlockNumber.count();
}
/// @notice Get trade maker minimum relative fee at given block number
/// @param blockNumber The concerned block number
function tradeMakerMinimumFee(uint256 blockNumber)
public
view
returns (int256)
{
return tradeMakerMinimumFeeByBlockNumber.valueAt(blockNumber);
}
/// @notice Set trade maker minimum relative fee at given block number tier
/// @param fromBlockNumber Block number from which the update applies
/// @param nominal Minimum relative fee
function setTradeMakerMinimumFee(uint256 fromBlockNumber, int256 nominal)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
tradeMakerMinimumFeeByBlockNumber.addEntry(fromBlockNumber, nominal);
emit SetTradeMakerMinimumFeeEvent(fromBlockNumber, nominal);
}
/// @notice Get number of minimum trade taker fee block number tiers
function tradeTakerMinimumFeesCount()
public
view
returns (uint256)
{
return tradeTakerMinimumFeeByBlockNumber.count();
}
/// @notice Get trade taker minimum relative fee at given block number
/// @param blockNumber The concerned block number
function tradeTakerMinimumFee(uint256 blockNumber)
public
view
returns (int256)
{
return tradeTakerMinimumFeeByBlockNumber.valueAt(blockNumber);
}
/// @notice Set trade taker minimum relative fee at given block number tier
/// @param fromBlockNumber Block number from which the update applies
/// @param nominal Minimum relative fee
function setTradeTakerMinimumFee(uint256 fromBlockNumber, int256 nominal)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
tradeTakerMinimumFeeByBlockNumber.addEntry(fromBlockNumber, nominal);
emit SetTradeTakerMinimumFeeEvent(fromBlockNumber, nominal);
}
/// @notice Get number of minimum payment fee block number tiers
function paymentMinimumFeesCount()
public
view
returns (uint256)
{
return paymentMinimumFeeByBlockNumber.count();
}
/// @notice Get payment minimum relative fee at given block number
/// @param blockNumber The concerned block number
function paymentMinimumFee(uint256 blockNumber)
public
view
returns (int256)
{
return paymentMinimumFeeByBlockNumber.valueAt(blockNumber);
}
/// @notice Set payment minimum relative fee at given block number tier
/// @param fromBlockNumber Block number from which the update applies
/// @param nominal Minimum relative fee
function setPaymentMinimumFee(uint256 fromBlockNumber, int256 nominal)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
paymentMinimumFeeByBlockNumber.addEntry(fromBlockNumber, nominal);
emit SetPaymentMinimumFeeEvent(fromBlockNumber, nominal);
}
/// @notice Get number of minimum payment fee block number tiers for given currency
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
function currencyPaymentMinimumFeesCount(address currencyCt, uint256 currencyId)
public
view
returns (uint256)
{
return currencyPaymentMinimumFeeByBlockNumber[currencyCt][currencyId].count();
}
/// @notice Get payment minimum relative fee for given currency at given block number
/// @param blockNumber The concerned block number
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
function currencyPaymentMinimumFee(uint256 blockNumber, address currencyCt, uint256 currencyId)
public
view
returns (int256)
{
if (0 < currencyPaymentMinimumFeeByBlockNumber[currencyCt][currencyId].count())
return currencyPaymentMinimumFeeByBlockNumber[currencyCt][currencyId].valueAt(blockNumber);
else
return paymentMinimumFee(blockNumber);
}
/// @notice Set payment minimum relative fee for given currency at given block number tier
/// @param fromBlockNumber Block number from which the update applies
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @param nominal Minimum relative fee
function setCurrencyPaymentMinimumFee(uint256 fromBlockNumber, address currencyCt, uint256 currencyId, int256 nominal)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
currencyPaymentMinimumFeeByBlockNumber[currencyCt][currencyId].addEntry(fromBlockNumber, nominal);
emit SetCurrencyPaymentMinimumFeeEvent(fromBlockNumber, currencyCt, currencyId, nominal);
}
/// @notice Get number of fee currencies for the given reference currency
/// @param currencyCt The address of the concerned reference currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned reference currency (0 for ETH and ERC20)
function feeCurrenciesCount(address currencyCt, uint256 currencyId)
public
view
returns (uint256)
{
return feeCurrencyByCurrencyBlockNumber.count(MonetaryTypesLib.Currency(currencyCt, currencyId));
}
/// @notice Get the fee currency for the given reference currency at given block number
/// @param blockNumber The concerned block number
/// @param currencyCt The address of the concerned reference currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned reference currency (0 for ETH and ERC20)
function feeCurrency(uint256 blockNumber, address currencyCt, uint256 currencyId)
public
view
returns (address ct, uint256 id)
{
MonetaryTypesLib.Currency storage _feeCurrency = feeCurrencyByCurrencyBlockNumber.currencyAt(
MonetaryTypesLib.Currency(currencyCt, currencyId), blockNumber
);
ct = _feeCurrency.ct;
id = _feeCurrency.id;
}
/// @notice Set the fee currency for the given reference currency at given block number
/// @param fromBlockNumber Block number from which the update applies
/// @param referenceCurrencyCt The address of the concerned reference currency contract (address(0) == ETH)
/// @param referenceCurrencyId The ID of the concerned reference currency (0 for ETH and ERC20)
/// @param feeCurrencyCt The address of the concerned fee currency contract (address(0) == ETH)
/// @param feeCurrencyId The ID of the concerned fee currency (0 for ETH and ERC20)
function setFeeCurrency(uint256 fromBlockNumber, address referenceCurrencyCt, uint256 referenceCurrencyId,
address feeCurrencyCt, uint256 feeCurrencyId)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
feeCurrencyByCurrencyBlockNumber.addEntry(
fromBlockNumber,
MonetaryTypesLib.Currency(referenceCurrencyCt, referenceCurrencyId),
MonetaryTypesLib.Currency(feeCurrencyCt, feeCurrencyId)
);
emit SetFeeCurrencyEvent(fromBlockNumber, referenceCurrencyCt, referenceCurrencyId,
feeCurrencyCt, feeCurrencyId);
}
/// @notice Get the current value of wallet lock timeout
/// @return The value of wallet lock timeout
function walletLockTimeout()
public
view
returns (uint256)
{
return walletLockTimeoutByBlockNumber.currentValue();
}
/// @notice Set timeout of wallet lock
/// @param fromBlockNumber Block number from which the update applies
/// @param timeoutInSeconds Timeout duration in seconds
function setWalletLockTimeout(uint256 fromBlockNumber, uint256 timeoutInSeconds)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
walletLockTimeoutByBlockNumber.addEntry(fromBlockNumber, timeoutInSeconds);
emit SetWalletLockTimeoutEvent(fromBlockNumber, timeoutInSeconds);
}
/// @notice Get the current value of cancel order challenge timeout
/// @return The value of cancel order challenge timeout
function cancelOrderChallengeTimeout()
public
view
returns (uint256)
{
return cancelOrderChallengeTimeoutByBlockNumber.currentValue();
}
/// @notice Set timeout of cancel order challenge
/// @param fromBlockNumber Block number from which the update applies
/// @param timeoutInSeconds Timeout duration in seconds
function setCancelOrderChallengeTimeout(uint256 fromBlockNumber, uint256 timeoutInSeconds)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
cancelOrderChallengeTimeoutByBlockNumber.addEntry(fromBlockNumber, timeoutInSeconds);
emit SetCancelOrderChallengeTimeoutEvent(fromBlockNumber, timeoutInSeconds);
}
/// @notice Get the current value of settlement challenge timeout
/// @return The value of settlement challenge timeout
function settlementChallengeTimeout()
public
view
returns (uint256)
{
return settlementChallengeTimeoutByBlockNumber.currentValue();
}
/// @notice Set timeout of settlement challenges
/// @param fromBlockNumber Block number from which the update applies
/// @param timeoutInSeconds Timeout duration in seconds
function setSettlementChallengeTimeout(uint256 fromBlockNumber, uint256 timeoutInSeconds)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
settlementChallengeTimeoutByBlockNumber.addEntry(fromBlockNumber, timeoutInSeconds);
emit SetSettlementChallengeTimeoutEvent(fromBlockNumber, timeoutInSeconds);
}
/// @notice Get the current value of fraud stake fraction
/// @return The value of fraud stake fraction
function fraudStakeFraction()
public
view
returns (uint256)
{
return fraudStakeFractionByBlockNumber.currentValue();
}
/// @notice Set fraction of security bond that will be gained from successfully challenging
/// in fraud challenge
/// @param fromBlockNumber Block number from which the update applies
/// @param stakeFraction The fraction gained
function setFraudStakeFraction(uint256 fromBlockNumber, uint256 stakeFraction)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
fraudStakeFractionByBlockNumber.addEntry(fromBlockNumber, stakeFraction);
emit SetFraudStakeFractionEvent(fromBlockNumber, stakeFraction);
}
/// @notice Get the current value of wallet settlement stake fraction
/// @return The value of wallet settlement stake fraction
function walletSettlementStakeFraction()
public
view
returns (uint256)
{
return walletSettlementStakeFractionByBlockNumber.currentValue();
}
/// @notice Set fraction of security bond that will be gained from successfully challenging
/// in settlement challenge triggered by wallet
/// @param fromBlockNumber Block number from which the update applies
/// @param stakeFraction The fraction gained
function setWalletSettlementStakeFraction(uint256 fromBlockNumber, uint256 stakeFraction)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
walletSettlementStakeFractionByBlockNumber.addEntry(fromBlockNumber, stakeFraction);
emit SetWalletSettlementStakeFractionEvent(fromBlockNumber, stakeFraction);
}
/// @notice Get the current value of operator settlement stake fraction
/// @return The value of operator settlement stake fraction
function operatorSettlementStakeFraction()
public
view
returns (uint256)
{
return operatorSettlementStakeFractionByBlockNumber.currentValue();
}
/// @notice Set fraction of security bond that will be gained from successfully challenging
/// in settlement challenge triggered by operator
/// @param fromBlockNumber Block number from which the update applies
/// @param stakeFraction The fraction gained
function setOperatorSettlementStakeFraction(uint256 fromBlockNumber, uint256 stakeFraction)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
operatorSettlementStakeFractionByBlockNumber.addEntry(fromBlockNumber, stakeFraction);
emit SetOperatorSettlementStakeFractionEvent(fromBlockNumber, stakeFraction);
}
/// @notice Get the current value of operator settlement stake
/// @return The value of operator settlement stake
function operatorSettlementStake()
public
view
returns (int256 amount, address currencyCt, uint256 currencyId)
{
MonetaryTypesLib.Figure storage stake = operatorSettlementStakeByBlockNumber.currentValue();
amount = stake.amount;
currencyCt = stake.currency.ct;
currencyId = stake.currency.id;
}
/// @notice Set figure of security bond that will be gained from successfully challenging
/// in settlement challenge triggered by operator
/// @param fromBlockNumber Block number from which the update applies
/// @param stakeAmount The amount gained
/// @param stakeCurrencyCt The address of currency gained
/// @param stakeCurrencyId The ID of currency gained
function setOperatorSettlementStake(uint256 fromBlockNumber, int256 stakeAmount,
address stakeCurrencyCt, uint256 stakeCurrencyId)
public
onlyOperator
onlyDelayedBlockNumber(fromBlockNumber)
{
MonetaryTypesLib.Figure memory stake = MonetaryTypesLib.Figure(stakeAmount, MonetaryTypesLib.Currency(stakeCurrencyCt, stakeCurrencyId));
operatorSettlementStakeByBlockNumber.addEntry(fromBlockNumber, stake);
emit SetOperatorSettlementStakeEvent(fromBlockNumber, stakeAmount, stakeCurrencyCt, stakeCurrencyId);
}
/// @notice Set the block number of the earliest settlement initiation
/// @param _earliestSettlementBlockNumber The block number of the earliest settlement
function setEarliestSettlementBlockNumber(uint256 _earliestSettlementBlockNumber)
public
onlyOperator
{
earliestSettlementBlockNumber = _earliestSettlementBlockNumber;
emit SetEarliestSettlementBlockNumberEvent(earliestSettlementBlockNumber);
}
/// @notice Disable further updates to the earliest settlement block number
/// @dev This operation can not be undone
function disableEarliestSettlementBlockNumberUpdate()
public
onlyOperator
{
earliestSettlementBlockNumberUpdateDisabled = true;
emit DisableEarliestSettlementBlockNumberUpdateEvent();
}
//
// Modifiers
// -----------------------------------------------------------------------------------------------------------------
modifier onlyDelayedBlockNumber(uint256 blockNumber) {
require(
0 == updateDelayBlocksByBlockNumber.count() ||
blockNumber >= block.number + updateDelayBlocksByBlockNumber.currentValue()
);
_;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
/**
* @title Benefactor
* @notice An ownable that has a client fund property
*/
contract Configurable is Ownable {
//
// Variables
// -----------------------------------------------------------------------------------------------------------------
Configuration public configuration;
//
// Events
// -----------------------------------------------------------------------------------------------------------------
event SetConfigurationEvent(Configuration oldConfiguration, Configuration newConfiguration);
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
/// @notice Set the configuration contract
/// @param newConfiguration The (address of) Configuration contract instance
function setConfiguration(Configuration newConfiguration)
public
onlyDeployer
notNullAddress(newConfiguration)
notSameAddresses(newConfiguration, configuration)
{
// Set new configuration
Configuration oldConfiguration = configuration;
configuration = newConfiguration;
// Emit event
emit SetConfigurationEvent(oldConfiguration, newConfiguration);
}
//
// Modifiers
// -----------------------------------------------------------------------------------------------------------------
modifier configurationInitialized() {
require(configuration != address(0));
_;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS based on Open-Zeppelin's SafeMath library
*/
/**
* @title SafeMathUintLib
* @dev Math operations with safety checks that throw on error
*/
library SafeMathUintLib {
function mul(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
uint256 c = a + b;
assert(c >= a);
return c;
}
//
//Clamping functions.
//
function clamp(uint256 a, uint256 min, uint256 max)
public
pure
returns (uint256)
{
return (a > max) ? max : ((a < min) ? min : a);
}
function clampMin(uint256 a, uint256 min)
public
pure
returns (uint256)
{
return (a < min) ? min : a;
}
function clampMax(uint256 a, uint256 max)
public
pure
returns (uint256)
{
return (a > max) ? max : a;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
library CurrenciesLib {
using SafeMathUintLib for uint256;
//
// Structures
// -----------------------------------------------------------------------------------------------------------------
struct Currencies {
MonetaryTypesLib.Currency[] currencies;
mapping(address => mapping(uint256 => uint256)) indexByCurrency;
}
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
function add(Currencies storage self, address currencyCt, uint256 currencyId)
internal
{
// Index is 1-based
if (0 == self.indexByCurrency[currencyCt][currencyId]) {
self.currencies.push(MonetaryTypesLib.Currency(currencyCt, currencyId));
self.indexByCurrency[currencyCt][currencyId] = self.currencies.length;
}
}
function removeByCurrency(Currencies storage self, address currencyCt, uint256 currencyId)
internal
{
// Index is 1-based
uint256 index = self.indexByCurrency[currencyCt][currencyId];
if (0 < index)
removeByIndex(self, index - 1);
}
function removeByIndex(Currencies storage self, uint256 index)
internal
{
require(index < self.currencies.length);
address currencyCt = self.currencies[index].ct;
uint256 currencyId = self.currencies[index].id;
if (index < self.currencies.length - 1) {
self.currencies[index] = self.currencies[self.currencies.length - 1];
self.indexByCurrency[self.currencies[index].ct][self.currencies[index].id] = index + 1;
}
self.currencies.length--;
self.indexByCurrency[currencyCt][currencyId] = 0;
}
function count(Currencies storage self)
internal
view
returns (uint256)
{
return self.currencies.length;
}
function has(Currencies storage self, address currencyCt, uint256 currencyId)
internal
view
returns (bool)
{
return 0 != self.indexByCurrency[currencyCt][currencyId];
}
function getByIndex(Currencies storage self, uint256 index)
internal
view
returns (MonetaryTypesLib.Currency)
{
require(index < self.currencies.length);
return self.currencies[index];
}
function getByIndices(Currencies storage self, uint256 low, uint256 up)
internal
view
returns (MonetaryTypesLib.Currency[])
{
require(0 < self.currencies.length);
require(low <= up);
up = up.clampMax(self.currencies.length - 1);
MonetaryTypesLib.Currency[] memory _currencies = new MonetaryTypesLib.Currency[](up - low + 1);
for (uint256 i = low; i <= up; i++)
_currencies[i - low] = self.currencies[i];
return _currencies;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
library FungibleBalanceLib {
using SafeMathIntLib for int256;
using SafeMathUintLib for uint256;
using CurrenciesLib for CurrenciesLib.Currencies;
//
// Structures
// -----------------------------------------------------------------------------------------------------------------
struct Record {
int256 amount;
uint256 blockNumber;
}
struct Balance {
mapping(address => mapping(uint256 => int256)) amountByCurrency;
mapping(address => mapping(uint256 => Record[])) recordsByCurrency;
CurrenciesLib.Currencies inUseCurrencies;
CurrenciesLib.Currencies everUsedCurrencies;
}
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
function get(Balance storage self, address currencyCt, uint256 currencyId)
internal
view
returns (int256)
{
return self.amountByCurrency[currencyCt][currencyId];
}
function getByBlockNumber(Balance storage self, address currencyCt, uint256 currencyId, uint256 blockNumber)
internal
view
returns (int256)
{
(int256 amount,) = recordByBlockNumber(self, currencyCt, currencyId, blockNumber);
return amount;
}
function set(Balance storage self, int256 amount, address currencyCt, uint256 currencyId)
internal
{
self.amountByCurrency[currencyCt][currencyId] = amount;
self.recordsByCurrency[currencyCt][currencyId].push(
Record(self.amountByCurrency[currencyCt][currencyId], block.number)
);
updateCurrencies(self, currencyCt, currencyId);
}
function add(Balance storage self, int256 amount, address currencyCt, uint256 currencyId)
internal
{
self.amountByCurrency[currencyCt][currencyId] = self.amountByCurrency[currencyCt][currencyId].add(amount);
self.recordsByCurrency[currencyCt][currencyId].push(
Record(self.amountByCurrency[currencyCt][currencyId], block.number)
);
updateCurrencies(self, currencyCt, currencyId);
}
function sub(Balance storage self, int256 amount, address currencyCt, uint256 currencyId)
internal
{
self.amountByCurrency[currencyCt][currencyId] = self.amountByCurrency[currencyCt][currencyId].sub(amount);
self.recordsByCurrency[currencyCt][currencyId].push(
Record(self.amountByCurrency[currencyCt][currencyId], block.number)
);
updateCurrencies(self, currencyCt, currencyId);
}
function transfer(Balance storage _from, Balance storage _to, int256 amount,
address currencyCt, uint256 currencyId)
internal
{
sub(_from, amount, currencyCt, currencyId);
add(_to, amount, currencyCt, currencyId);
}
function add_nn(Balance storage self, int256 amount, address currencyCt, uint256 currencyId)
internal
{
self.amountByCurrency[currencyCt][currencyId] = self.amountByCurrency[currencyCt][currencyId].add_nn(amount);
self.recordsByCurrency[currencyCt][currencyId].push(
Record(self.amountByCurrency[currencyCt][currencyId], block.number)
);
updateCurrencies(self, currencyCt, currencyId);
}
function sub_nn(Balance storage self, int256 amount, address currencyCt, uint256 currencyId)
internal
{
self.amountByCurrency[currencyCt][currencyId] = self.amountByCurrency[currencyCt][currencyId].sub_nn(amount);
self.recordsByCurrency[currencyCt][currencyId].push(
Record(self.amountByCurrency[currencyCt][currencyId], block.number)
);
updateCurrencies(self, currencyCt, currencyId);
}
function transfer_nn(Balance storage _from, Balance storage _to, int256 amount,
address currencyCt, uint256 currencyId)
internal
{
sub_nn(_from, amount, currencyCt, currencyId);
add_nn(_to, amount, currencyCt, currencyId);
}
function recordsCount(Balance storage self, address currencyCt, uint256 currencyId)
internal
view
returns (uint256)
{
return self.recordsByCurrency[currencyCt][currencyId].length;
}
function recordByBlockNumber(Balance storage self, address currencyCt, uint256 currencyId, uint256 blockNumber)
internal
view
returns (int256, uint256)
{
uint256 index = indexByBlockNumber(self, currencyCt, currencyId, blockNumber);
return 0 < index ? recordByIndex(self, currencyCt, currencyId, index - 1) : (0, 0);
}
function recordByIndex(Balance storage self, address currencyCt, uint256 currencyId, uint256 index)
internal
view
returns (int256, uint256)
{
if (0 == self.recordsByCurrency[currencyCt][currencyId].length)
return (0, 0);
index = index.clampMax(self.recordsByCurrency[currencyCt][currencyId].length - 1);
Record storage record = self.recordsByCurrency[currencyCt][currencyId][index];
return (record.amount, record.blockNumber);
}
function lastRecord(Balance storage self, address currencyCt, uint256 currencyId)
internal
view
returns (int256, uint256)
{
if (0 == self.recordsByCurrency[currencyCt][currencyId].length)
return (0, 0);
Record storage record = self.recordsByCurrency[currencyCt][currencyId][self.recordsByCurrency[currencyCt][currencyId].length - 1];
return (record.amount, record.blockNumber);
}
function hasInUseCurrency(Balance storage self, address currencyCt, uint256 currencyId)
internal
view
returns (bool)
{
return self.inUseCurrencies.has(currencyCt, currencyId);
}
function hasEverUsedCurrency(Balance storage self, address currencyCt, uint256 currencyId)
internal
view
returns (bool)
{
return self.everUsedCurrencies.has(currencyCt, currencyId);
}
function updateCurrencies(Balance storage self, address currencyCt, uint256 currencyId)
internal
{
if (0 == self.amountByCurrency[currencyCt][currencyId] && self.inUseCurrencies.has(currencyCt, currencyId))
self.inUseCurrencies.removeByCurrency(currencyCt, currencyId);
else if (!self.inUseCurrencies.has(currencyCt, currencyId)) {
self.inUseCurrencies.add(currencyCt, currencyId);
self.everUsedCurrencies.add(currencyCt, currencyId);
}
}
function indexByBlockNumber(Balance storage self, address currencyCt, uint256 currencyId, uint256 blockNumber)
internal
view
returns (uint256)
{
if (0 == self.recordsByCurrency[currencyCt][currencyId].length)
return 0;
for (uint256 i = self.recordsByCurrency[currencyCt][currencyId].length; i > 0; i--)
if (self.recordsByCurrency[currencyCt][currencyId][i - 1].blockNumber <= blockNumber)
return i;
return 0;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
library NonFungibleBalanceLib {
using SafeMathIntLib for int256;
using SafeMathUintLib for uint256;
using CurrenciesLib for CurrenciesLib.Currencies;
//
// Structures
// -----------------------------------------------------------------------------------------------------------------
struct Record {
int256[] ids;
uint256 blockNumber;
}
struct Balance {
mapping(address => mapping(uint256 => int256[])) idsByCurrency;
mapping(address => mapping(uint256 => mapping(int256 => uint256))) idIndexById;
mapping(address => mapping(uint256 => Record[])) recordsByCurrency;
CurrenciesLib.Currencies inUseCurrencies;
CurrenciesLib.Currencies everUsedCurrencies;
}
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
function get(Balance storage self, address currencyCt, uint256 currencyId)
internal
view
returns (int256[])
{
return self.idsByCurrency[currencyCt][currencyId];
}
function getByIndices(Balance storage self, address currencyCt, uint256 currencyId, uint256 indexLow, uint256 indexUp)
internal
view
returns (int256[])
{
if (0 == self.idsByCurrency[currencyCt][currencyId].length)
return new int256[](0);
indexUp = indexUp.clampMax(self.idsByCurrency[currencyCt][currencyId].length - 1);
int256[] memory idsByCurrency = new int256[](indexUp - indexLow + 1);
for (uint256 i = indexLow; i < indexUp; i++)
idsByCurrency[i - indexLow] = self.idsByCurrency[currencyCt][currencyId][i];
return idsByCurrency;
}
function idsCount(Balance storage self, address currencyCt, uint256 currencyId)
internal
view
returns (uint256)
{
return self.idsByCurrency[currencyCt][currencyId].length;
}
function hasId(Balance storage self, int256 id, address currencyCt, uint256 currencyId)
internal
view
returns (bool)
{
return 0 < self.idIndexById[currencyCt][currencyId][id];
}
function recordByBlockNumber(Balance storage self, address currencyCt, uint256 currencyId, uint256 blockNumber)
internal
view
returns (int256[], uint256)
{
uint256 index = indexByBlockNumber(self, currencyCt, currencyId, blockNumber);
return 0 < index ? recordByIndex(self, currencyCt, currencyId, index - 1) : (new int256[](0), 0);
}
function recordByIndex(Balance storage self, address currencyCt, uint256 currencyId, uint256 index)
internal
view
returns (int256[], uint256)
{
if (0 == self.recordsByCurrency[currencyCt][currencyId].length)
return (new int256[](0), 0);
index = index.clampMax(self.recordsByCurrency[currencyCt][currencyId].length - 1);
Record storage record = self.recordsByCurrency[currencyCt][currencyId][index];
return (record.ids, record.blockNumber);
}
function lastRecord(Balance storage self, address currencyCt, uint256 currencyId)
internal
view
returns (int256[], uint256)
{
if (0 == self.recordsByCurrency[currencyCt][currencyId].length)
return (new int256[](0), 0);
Record storage record = self.recordsByCurrency[currencyCt][currencyId][self.recordsByCurrency[currencyCt][currencyId].length - 1];
return (record.ids, record.blockNumber);
}
function recordsCount(Balance storage self, address currencyCt, uint256 currencyId)
internal
view
returns (uint256)
{
return self.recordsByCurrency[currencyCt][currencyId].length;
}
function set(Balance storage self, int256 id, address currencyCt, uint256 currencyId)
internal
{
int256[] memory ids = new int256[](1);
ids[0] = id;
set(self, ids, currencyCt, currencyId);
}
function set(Balance storage self, int256[] ids, address currencyCt, uint256 currencyId)
internal
{
uint256 i;
for (i = 0; i < self.idsByCurrency[currencyCt][currencyId].length; i++)
self.idIndexById[currencyCt][currencyId][self.idsByCurrency[currencyCt][currencyId][i]] = 0;
self.idsByCurrency[currencyCt][currencyId] = ids;
for (i = 0; i < self.idsByCurrency[currencyCt][currencyId].length; i++)
self.idIndexById[currencyCt][currencyId][self.idsByCurrency[currencyCt][currencyId][i]] = i + 1;
self.recordsByCurrency[currencyCt][currencyId].push(
Record(self.idsByCurrency[currencyCt][currencyId], block.number)
);
updateInUseCurrencies(self, currencyCt, currencyId);
}
function reset(Balance storage self, address currencyCt, uint256 currencyId)
internal
{
for (uint256 i = 0; i < self.idsByCurrency[currencyCt][currencyId].length; i++)
self.idIndexById[currencyCt][currencyId][self.idsByCurrency[currencyCt][currencyId][i]] = 0;
self.idsByCurrency[currencyCt][currencyId].length = 0;
self.recordsByCurrency[currencyCt][currencyId].push(
Record(self.idsByCurrency[currencyCt][currencyId], block.number)
);
updateInUseCurrencies(self, currencyCt, currencyId);
}
function add(Balance storage self, int256 id, address currencyCt, uint256 currencyId)
internal
returns (bool)
{
if (0 < self.idIndexById[currencyCt][currencyId][id])
return false;
self.idsByCurrency[currencyCt][currencyId].push(id);
self.idIndexById[currencyCt][currencyId][id] = self.idsByCurrency[currencyCt][currencyId].length;
self.recordsByCurrency[currencyCt][currencyId].push(
Record(self.idsByCurrency[currencyCt][currencyId], block.number)
);
updateInUseCurrencies(self, currencyCt, currencyId);
return true;
}
function sub(Balance storage self, int256 id, address currencyCt, uint256 currencyId)
internal
returns (bool)
{
uint256 index = self.idIndexById[currencyCt][currencyId][id];
if (0 == index)
return false;
if (index < self.idsByCurrency[currencyCt][currencyId].length) {
self.idsByCurrency[currencyCt][currencyId][index - 1] = self.idsByCurrency[currencyCt][currencyId][self.idsByCurrency[currencyCt][currencyId].length - 1];
self.idIndexById[currencyCt][currencyId][self.idsByCurrency[currencyCt][currencyId][index - 1]] = index;
}
self.idsByCurrency[currencyCt][currencyId].length--;
self.idIndexById[currencyCt][currencyId][id] = 0;
self.recordsByCurrency[currencyCt][currencyId].push(
Record(self.idsByCurrency[currencyCt][currencyId], block.number)
);
updateInUseCurrencies(self, currencyCt, currencyId);
return true;
}
function transfer(Balance storage _from, Balance storage _to, int256 id,
address currencyCt, uint256 currencyId)
internal
returns (bool)
{
return sub(_from, id, currencyCt, currencyId) && add(_to, id, currencyCt, currencyId);
}
function hasInUseCurrency(Balance storage self, address currencyCt, uint256 currencyId)
internal
view
returns (bool)
{
return self.inUseCurrencies.has(currencyCt, currencyId);
}
function hasEverUsedCurrency(Balance storage self, address currencyCt, uint256 currencyId)
internal
view
returns (bool)
{
return self.everUsedCurrencies.has(currencyCt, currencyId);
}
function updateInUseCurrencies(Balance storage self, address currencyCt, uint256 currencyId)
internal
{
if (0 == self.idsByCurrency[currencyCt][currencyId].length && self.inUseCurrencies.has(currencyCt, currencyId))
self.inUseCurrencies.removeByCurrency(currencyCt, currencyId);
else if (!self.inUseCurrencies.has(currencyCt, currencyId)) {
self.inUseCurrencies.add(currencyCt, currencyId);
self.everUsedCurrencies.add(currencyCt, currencyId);
}
}
function indexByBlockNumber(Balance storage self, address currencyCt, uint256 currencyId, uint256 blockNumber)
internal
view
returns (uint256)
{
if (0 == self.recordsByCurrency[currencyCt][currencyId].length)
return 0;
for (uint256 i = self.recordsByCurrency[currencyCt][currencyId].length; i > 0; i--)
if (self.recordsByCurrency[currencyCt][currencyId][i - 1].blockNumber <= blockNumber)
return i;
return 0;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
/**
* @title Balance tracker
* @notice An ownable to track balances of generic types
*/
contract BalanceTracker is Ownable, Servable {
using SafeMathIntLib for int256;
using SafeMathUintLib for uint256;
using FungibleBalanceLib for FungibleBalanceLib.Balance;
using NonFungibleBalanceLib for NonFungibleBalanceLib.Balance;
//
// Constants
// -----------------------------------------------------------------------------------------------------------------
string constant public DEPOSITED_BALANCE_TYPE = "deposited";
string constant public SETTLED_BALANCE_TYPE = "settled";
string constant public STAGED_BALANCE_TYPE = "staged";
//
// Structures
// -----------------------------------------------------------------------------------------------------------------
struct Wallet {
mapping(bytes32 => FungibleBalanceLib.Balance) fungibleBalanceByType;
mapping(bytes32 => NonFungibleBalanceLib.Balance) nonFungibleBalanceByType;
}
//
// Variables
// -----------------------------------------------------------------------------------------------------------------
bytes32 public depositedBalanceType;
bytes32 public settledBalanceType;
bytes32 public stagedBalanceType;
bytes32[] public _allBalanceTypes;
bytes32[] public _activeBalanceTypes;
bytes32[] public trackedBalanceTypes;
mapping(bytes32 => bool) public trackedBalanceTypeMap;
mapping(address => Wallet) private walletMap;
address[] public trackedWallets;
mapping(address => uint256) public trackedWalletIndexByWallet;
//
// Constructor
// -----------------------------------------------------------------------------------------------------------------
constructor(address deployer) Ownable(deployer)
public
{
depositedBalanceType = keccak256(abi.encodePacked(DEPOSITED_BALANCE_TYPE));
settledBalanceType = keccak256(abi.encodePacked(SETTLED_BALANCE_TYPE));
stagedBalanceType = keccak256(abi.encodePacked(STAGED_BALANCE_TYPE));
_allBalanceTypes.push(settledBalanceType);
_allBalanceTypes.push(depositedBalanceType);
_allBalanceTypes.push(stagedBalanceType);
_activeBalanceTypes.push(settledBalanceType);
_activeBalanceTypes.push(depositedBalanceType);
}
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
/// @notice Get the fungible balance (amount) of the given wallet, type and currency
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @return The stored balance
function get(address wallet, bytes32 _type, address currencyCt, uint256 currencyId)
public
view
returns (int256)
{
return walletMap[wallet].fungibleBalanceByType[_type].get(currencyCt, currencyId);
}
/// @notice Get the non-fungible balance (IDs) of the given wallet, type, currency and index range
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @param indexLow The lower index of IDs
/// @param indexUp The upper index of IDs
/// @return The stored balance
function getByIndices(address wallet, bytes32 _type, address currencyCt, uint256 currencyId,
uint256 indexLow, uint256 indexUp)
public
view
returns (int256[])
{
return walletMap[wallet].nonFungibleBalanceByType[_type].getByIndices(
currencyCt, currencyId, indexLow, indexUp
);
}
/// @notice Get all the non-fungible balance (IDs) of the given wallet, type and currency
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @return The stored balance
function getAll(address wallet, bytes32 _type, address currencyCt, uint256 currencyId)
public
view
returns (int256[])
{
return walletMap[wallet].nonFungibleBalanceByType[_type].get(
currencyCt, currencyId
);
}
/// @notice Get the count of non-fungible IDs of the given wallet, type and currency
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @return The count of IDs
function idsCount(address wallet, bytes32 _type, address currencyCt, uint256 currencyId)
public
view
returns (uint256)
{
return walletMap[wallet].nonFungibleBalanceByType[_type].idsCount(
currencyCt, currencyId
);
}
/// @notice Gauge whether the ID is included in the given wallet, type and currency
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param id The ID of the concerned unit
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @return true if ID is included, else false
function hasId(address wallet, bytes32 _type, int256 id, address currencyCt, uint256 currencyId)
public
view
returns (bool)
{
return walletMap[wallet].nonFungibleBalanceByType[_type].hasId(
id, currencyCt, currencyId
);
}
/// @notice Set the balance of the given wallet, type and currency to the given value
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param value The value (amount of fungible, id of non-fungible) to set
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @param fungible True if setting fungible balance, else false
function set(address wallet, bytes32 _type, int256 value, address currencyCt, uint256 currencyId, bool fungible)
public
onlyActiveService
{
// Update the balance
if (fungible)
walletMap[wallet].fungibleBalanceByType[_type].set(
value, currencyCt, currencyId
);
else
walletMap[wallet].nonFungibleBalanceByType[_type].set(
value, currencyCt, currencyId
);
// Update balance type hashes
_updateTrackedBalanceTypes(_type);
// Update tracked wallets
_updateTrackedWallets(wallet);
}
/// @notice Set the non-fungible balance IDs of the given wallet, type and currency to the given value
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param ids The ids of non-fungible) to set
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
function setIds(address wallet, bytes32 _type, int256[] ids, address currencyCt, uint256 currencyId)
public
onlyActiveService
{
// Update the balance
walletMap[wallet].nonFungibleBalanceByType[_type].set(
ids, currencyCt, currencyId
);
// Update balance type hashes
_updateTrackedBalanceTypes(_type);
// Update tracked wallets
_updateTrackedWallets(wallet);
}
/// @notice Add the given value to the balance of the given wallet, type and currency
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param value The value (amount of fungible, id of non-fungible) to add
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @param fungible True if adding fungible balance, else false
function add(address wallet, bytes32 _type, int256 value, address currencyCt, uint256 currencyId,
bool fungible)
public
onlyActiveService
{
// Update the balance
if (fungible)
walletMap[wallet].fungibleBalanceByType[_type].add(
value, currencyCt, currencyId
);
else
walletMap[wallet].nonFungibleBalanceByType[_type].add(
value, currencyCt, currencyId
);
// Update balance type hashes
_updateTrackedBalanceTypes(_type);
// Update tracked wallets
_updateTrackedWallets(wallet);
}
/// @notice Subtract the given value from the balance of the given wallet, type and currency
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param value The value (amount of fungible, id of non-fungible) to subtract
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @param fungible True if subtracting fungible balance, else false
function sub(address wallet, bytes32 _type, int256 value, address currencyCt, uint256 currencyId,
bool fungible)
public
onlyActiveService
{
// Update the balance
if (fungible)
walletMap[wallet].fungibleBalanceByType[_type].sub(
value, currencyCt, currencyId
);
else
walletMap[wallet].nonFungibleBalanceByType[_type].sub(
value, currencyCt, currencyId
);
// Update tracked wallets
_updateTrackedWallets(wallet);
}
/// @notice Gauge whether this tracker has in-use data for the given wallet, type and currency
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @return true if data is stored, else false
function hasInUseCurrency(address wallet, bytes32 _type, address currencyCt, uint256 currencyId)
public
view
returns (bool)
{
return walletMap[wallet].fungibleBalanceByType[_type].hasInUseCurrency(currencyCt, currencyId)
|| walletMap[wallet].nonFungibleBalanceByType[_type].hasInUseCurrency(currencyCt, currencyId);
}
/// @notice Gauge whether this tracker has ever-used data for the given wallet, type and currency
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @return true if data is stored, else false
function hasEverUsedCurrency(address wallet, bytes32 _type, address currencyCt, uint256 currencyId)
public
view
returns (bool)
{
return walletMap[wallet].fungibleBalanceByType[_type].hasEverUsedCurrency(currencyCt, currencyId)
|| walletMap[wallet].nonFungibleBalanceByType[_type].hasEverUsedCurrency(currencyCt, currencyId);
}
/// @notice Get the count of fungible balance records for the given wallet, type and currency
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @return The count of balance log entries
function fungibleRecordsCount(address wallet, bytes32 _type, address currencyCt, uint256 currencyId)
public
view
returns (uint256)
{
return walletMap[wallet].fungibleBalanceByType[_type].recordsCount(currencyCt, currencyId);
}
/// @notice Get the fungible balance record for the given wallet, type, currency
/// log entry index
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @param index The concerned record index
/// @return The balance record
function fungibleRecordByIndex(address wallet, bytes32 _type, address currencyCt, uint256 currencyId,
uint256 index)
public
view
returns (int256 amount, uint256 blockNumber)
{
return walletMap[wallet].fungibleBalanceByType[_type].recordByIndex(currencyCt, currencyId, index);
}
/// @notice Get the non-fungible balance record for the given wallet, type, currency
/// block number
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @param _blockNumber The concerned block number
/// @return The balance record
function fungibleRecordByBlockNumber(address wallet, bytes32 _type, address currencyCt, uint256 currencyId,
uint256 _blockNumber)
public
view
returns (int256 amount, uint256 blockNumber)
{
return walletMap[wallet].fungibleBalanceByType[_type].recordByBlockNumber(currencyCt, currencyId, _blockNumber);
}
/// @notice Get the last (most recent) non-fungible balance record for the given wallet, type and currency
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @return The last log entry
function lastFungibleRecord(address wallet, bytes32 _type, address currencyCt, uint256 currencyId)
public
view
returns (int256 amount, uint256 blockNumber)
{
return walletMap[wallet].fungibleBalanceByType[_type].lastRecord(currencyCt, currencyId);
}
/// @notice Get the count of non-fungible balance records for the given wallet, type and currency
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @return The count of balance log entries
function nonFungibleRecordsCount(address wallet, bytes32 _type, address currencyCt, uint256 currencyId)
public
view
returns (uint256)
{
return walletMap[wallet].nonFungibleBalanceByType[_type].recordsCount(currencyCt, currencyId);
}
/// @notice Get the non-fungible balance record for the given wallet, type, currency
/// and record index
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @param index The concerned record index
/// @return The balance record
function nonFungibleRecordByIndex(address wallet, bytes32 _type, address currencyCt, uint256 currencyId,
uint256 index)
public
view
returns (int256[] ids, uint256 blockNumber)
{
return walletMap[wallet].nonFungibleBalanceByType[_type].recordByIndex(currencyCt, currencyId, index);
}
/// @notice Get the non-fungible balance record for the given wallet, type, currency
/// and block number
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @param _blockNumber The concerned block number
/// @return The balance record
function nonFungibleRecordByBlockNumber(address wallet, bytes32 _type, address currencyCt, uint256 currencyId,
uint256 _blockNumber)
public
view
returns (int256[] ids, uint256 blockNumber)
{
return walletMap[wallet].nonFungibleBalanceByType[_type].recordByBlockNumber(currencyCt, currencyId, _blockNumber);
}
/// @notice Get the last (most recent) non-fungible balance record for the given wallet, type and currency
/// @param wallet The address of the concerned wallet
/// @param _type The balance type
/// @param currencyCt The address of the concerned currency contract (address(0) == ETH)
/// @param currencyId The ID of the concerned currency (0 for ETH and ERC20)
/// @return The last log entry
function lastNonFungibleRecord(address wallet, bytes32 _type, address currencyCt, uint256 currencyId)
public
view
returns (int256[] ids, uint256 blockNumber)
{
return walletMap[wallet].nonFungibleBalanceByType[_type].lastRecord(currencyCt, currencyId);
}
/// @notice Get the count of tracked balance types
/// @return The count of tracked balance types
function trackedBalanceTypesCount()
public
view
returns (uint256)
{
return trackedBalanceTypes.length;
}
/// @notice Get the count of tracked wallets
/// @return The count of tracked wallets
function trackedWalletsCount()
public
view
returns (uint256)
{
return trackedWallets.length;
}
/// @notice Get the default full set of balance types
/// @return The set of all balance types
function allBalanceTypes()
public
view
returns (bytes32[])
{
return _allBalanceTypes;
}
/// @notice Get the default set of active balance types
/// @return The set of active balance types
function activeBalanceTypes()
public
view
returns (bytes32[])
{
return _activeBalanceTypes;
}
/// @notice Get the subset of tracked wallets in the given index range
/// @param low The lower index
/// @param up The upper index
/// @return The subset of tracked wallets
function trackedWalletsByIndices(uint256 low, uint256 up)
public
view
returns (address[])
{
require(0 < trackedWallets.length);
require(low <= up);
up = up.clampMax(trackedWallets.length - 1);
address[] memory _trackedWallets = new address[](up - low + 1);
for (uint256 i = low; i <= up; i++)
_trackedWallets[i - low] = trackedWallets[i];
return _trackedWallets;
}
//
// Private functions
// -----------------------------------------------------------------------------------------------------------------
function _updateTrackedBalanceTypes(bytes32 _type)
private
{
if (!trackedBalanceTypeMap[_type]) {
trackedBalanceTypeMap[_type] = true;
trackedBalanceTypes.push(_type);
}
}
function _updateTrackedWallets(address wallet)
private
{
if (0 == trackedWalletIndexByWallet[wallet]) {
trackedWallets.push(wallet);
trackedWalletIndexByWallet[wallet] = trackedWallets.length;
}
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
/**
* @title BalanceTrackable
* @notice An ownable that has a balance tracker property
*/
contract BalanceTrackable is Ownable {
//
// Variables
// -----------------------------------------------------------------------------------------------------------------
BalanceTracker public balanceTracker;
bool public balanceTrackerFrozen;
//
// Events
// -----------------------------------------------------------------------------------------------------------------
event SetBalanceTrackerEvent(BalanceTracker oldBalanceTracker, BalanceTracker newBalanceTracker);
event FreezeBalanceTrackerEvent();
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
/// @notice Set the balance tracker contract
/// @param newBalanceTracker The (address of) BalanceTracker contract instance
function setBalanceTracker(BalanceTracker newBalanceTracker)
public
onlyDeployer
notNullAddress(newBalanceTracker)
notSameAddresses(newBalanceTracker, balanceTracker)
{
// Require that this contract has not been frozen
require(!balanceTrackerFrozen);
// Update fields
BalanceTracker oldBalanceTracker = balanceTracker;
balanceTracker = newBalanceTracker;
// Emit event
emit SetBalanceTrackerEvent(oldBalanceTracker, newBalanceTracker);
}
/// @notice Freeze the balance tracker from further updates
/// @dev This operation can not be undone
function freezeBalanceTracker()
public
onlyDeployer
{
balanceTrackerFrozen = true;
// Emit event
emit FreezeBalanceTrackerEvent();
}
//
// Modifiers
// -----------------------------------------------------------------------------------------------------------------
modifier balanceTrackerInitialized() {
require(balanceTracker != address(0));
_;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
/**
* @title NahmiiTypesLib
* @dev Data types of general nahmii character
*/
library NahmiiTypesLib {
//
// Enums
// -----------------------------------------------------------------------------------------------------------------
enum ChallengePhase {Dispute, Closed}
//
// Structures
// -----------------------------------------------------------------------------------------------------------------
struct OriginFigure {
uint256 originId;
MonetaryTypesLib.Figure figure;
}
struct IntendedConjugateCurrency {
MonetaryTypesLib.Currency intended;
MonetaryTypesLib.Currency conjugate;
}
struct SingleFigureTotalOriginFigures {
MonetaryTypesLib.Figure single;
OriginFigure[] total;
}
struct TotalOriginFigures {
OriginFigure[] total;
}
struct CurrentPreviousInt256 {
int256 current;
int256 previous;
}
struct SingleTotalInt256 {
int256 single;
int256 total;
}
struct IntendedConjugateCurrentPreviousInt256 {
CurrentPreviousInt256 intended;
CurrentPreviousInt256 conjugate;
}
struct IntendedConjugateSingleTotalInt256 {
SingleTotalInt256 intended;
SingleTotalInt256 conjugate;
}
struct WalletOperatorHashes {
bytes32 wallet;
bytes32 operator;
}
struct Signature {
bytes32 r;
bytes32 s;
uint8 v;
}
struct Seal {
bytes32 hash;
Signature signature;
}
struct WalletOperatorSeal {
Seal wallet;
Seal operator;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
/**
* @title SettlementChallengeTypesLib
* @dev Types for settlement challenges
*/
library SettlementChallengeTypesLib {
//
// Structures
// -----------------------------------------------------------------------------------------------------------------
enum Status {Qualified, Disqualified}
struct Proposal {
address wallet;
uint256 nonce;
uint256 referenceBlockNumber;
uint256 definitionBlockNumber;
uint256 expirationTime;
// Status
Status status;
// Amounts
Amounts amounts;
// Currency
MonetaryTypesLib.Currency currency;
// Info on challenged driip
Driip challenged;
// True is equivalent to reward coming from wallet's balance
bool walletInitiated;
// True if proposal has been terminated
bool terminated;
// Disqualification
Disqualification disqualification;
}
struct Amounts {
// Cumulative (relative) transfer info
int256 cumulativeTransfer;
// Stage info
int256 stage;
// Balances after amounts have been staged
int256 targetBalance;
}
struct Driip {
// Kind ("payment", "trade", ...)
string kind;
// Hash (of operator)
bytes32 hash;
}
struct Disqualification {
// Challenger
address challenger;
uint256 nonce;
uint256 blockNumber;
// Info on candidate driip
Driip candidate;
}
}
/*
* Hubii Nahmii
*
* Compliant with the Hubii Nahmii specification v0.12.
*
* Copyright (C) 2017-2018 Hubii AS
*/
/**
* @title NullSettlementChallengeState
* @notice Where null settlements challenge state is managed
*/
contract NullSettlementChallengeState is Ownable, Servable, Configurable, BalanceTrackable {
using SafeMathIntLib for int256;
using SafeMathUintLib for uint256;
//
// Constants
// -----------------------------------------------------------------------------------------------------------------
string constant public INITIATE_PROPOSAL_ACTION = "initiate_proposal";
string constant public TERMINATE_PROPOSAL_ACTION = "terminate_proposal";
string constant public REMOVE_PROPOSAL_ACTION = "remove_proposal";
string constant public DISQUALIFY_PROPOSAL_ACTION = "disqualify_proposal";
//
// Variables
// -----------------------------------------------------------------------------------------------------------------
SettlementChallengeTypesLib.Proposal[] public proposals;
mapping(address => mapping(address => mapping(uint256 => uint256))) public proposalIndexByWalletCurrency;
//
// Events
// -----------------------------------------------------------------------------------------------------------------
event InitiateProposalEvent(address wallet, uint256 nonce, int256 stageAmount, int256 targetBalanceAmount,
MonetaryTypesLib.Currency currency, uint256 blockNumber, bool walletInitiated);
event TerminateProposalEvent(address wallet, uint256 nonce, int256 stageAmount, int256 targetBalanceAmount,
MonetaryTypesLib.Currency currency, uint256 blockNumber, bool walletInitiated);
event RemoveProposalEvent(address wallet, uint256 nonce, int256 stageAmount, int256 targetBalanceAmount,
MonetaryTypesLib.Currency currency, uint256 blockNumber, bool walletInitiated);
event DisqualifyProposalEvent(address challengedWallet, uint256 challangedNonce, int256 stageAmount,
int256 targetBalanceAmount, MonetaryTypesLib.Currency currency, uint256 blockNumber, bool walletInitiated,
address challengerWallet, uint256 candidateNonce, bytes32 candidateHash, string candidateKind);
//
// Constructor
// -----------------------------------------------------------------------------------------------------------------
constructor(address deployer) Ownable(deployer) public {
}
//
// Functions
// -----------------------------------------------------------------------------------------------------------------
/// @notice Get the number of proposals
/// @return The number of proposals
function proposalsCount()
public
view
returns (uint256)
{
return proposals.length;
}
/// @notice Initiate a proposal
/// @param wallet The address of the concerned challenged wallet
/// @param nonce The wallet nonce
/// @param stageAmount The proposal stage amount
/// @param targetBalanceAmount The proposal target balance amount
/// @param currency The concerned currency
/// @param blockNumber The proposal block number
/// @param walletInitiated True if initiated by the concerned challenged wallet
function initiateProposal(address wallet, uint256 nonce, int256 stageAmount, int256 targetBalanceAmount,
MonetaryTypesLib.Currency currency, uint256 blockNumber, bool walletInitiated)
public
onlyEnabledServiceAction(INITIATE_PROPOSAL_ACTION)
{
// Initiate proposal
_initiateProposal(
wallet, nonce, stageAmount, targetBalanceAmount,
currency, blockNumber, walletInitiated
);
// Emit event
emit InitiateProposalEvent(
wallet, nonce, stageAmount, targetBalanceAmount, currency,
blockNumber, walletInitiated
);
}
/// @notice Terminate a proposal
/// @param wallet The address of the concerned challenged wallet
/// @param currency The concerned currency
function terminateProposal(address wallet, MonetaryTypesLib.Currency currency)
public
onlyEnabledServiceAction(TERMINATE_PROPOSAL_ACTION)
{
// Get the proposal index
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
// Return gracefully if there is no proposal to terminate
if (0 == index)
return;
// Terminate proposal
proposals[index - 1].terminated = true;
// Emit event
emit TerminateProposalEvent(
wallet, proposals[index - 1].nonce, proposals[index - 1].amounts.stage,
proposals[index - 1].amounts.targetBalance, currency,
proposals[index - 1].referenceBlockNumber, proposals[index - 1].walletInitiated
);
}
/// @notice Terminate a proposal
/// @param wallet The address of the concerned challenged wallet
/// @param currency The concerned currency
/// @param walletTerminated True if wallet terminated
function terminateProposal(address wallet, MonetaryTypesLib.Currency currency, bool walletTerminated)
public
onlyEnabledServiceAction(TERMINATE_PROPOSAL_ACTION)
{
// Get the proposal index
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
// Return gracefully if there is no proposal to terminate
if (0 == index)
return;
// Require that role that initialized (wallet or operator) can only cancel its own proposal
require(walletTerminated == proposals[index - 1].walletInitiated);
// Terminate proposal
proposals[index - 1].terminated = true;
// Emit event
emit TerminateProposalEvent(
wallet, proposals[index - 1].nonce, proposals[index - 1].amounts.stage,
proposals[index - 1].amounts.targetBalance, currency,
proposals[index - 1].referenceBlockNumber, proposals[index - 1].walletInitiated
);
}
/// @notice Remove a proposal
/// @param wallet The address of the concerned challenged wallet
/// @param currency The concerned currency
function removeProposal(address wallet, MonetaryTypesLib.Currency currency)
public
onlyEnabledServiceAction(REMOVE_PROPOSAL_ACTION)
{
// Get the proposal index
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
// Return gracefully if there is no proposal to remove
if (0 == index)
return;
// Emit event
emit RemoveProposalEvent(
wallet, proposals[index - 1].nonce, proposals[index - 1].amounts.stage,
proposals[index - 1].amounts.targetBalance, currency,
proposals[index - 1].referenceBlockNumber, proposals[index - 1].walletInitiated
);
// Remove proposal
_removeProposal(index);
}
/// @notice Remove a proposal
/// @param wallet The address of the concerned challenged wallet
/// @param currency The concerned currency
/// @param walletTerminated True if wallet terminated
function removeProposal(address wallet, MonetaryTypesLib.Currency currency, bool walletTerminated)
public
onlyEnabledServiceAction(REMOVE_PROPOSAL_ACTION)
{
// Get the proposal index
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
// Return gracefully if there is no proposal to remove
if (0 == index)
return;
// Require that role that initialized (wallet or operator) can only cancel its own proposal
require(walletTerminated == proposals[index - 1].walletInitiated);
// Emit event
emit RemoveProposalEvent(
wallet, proposals[index - 1].nonce, proposals[index - 1].amounts.stage,
proposals[index - 1].amounts.targetBalance, currency,
proposals[index - 1].referenceBlockNumber, proposals[index - 1].walletInitiated
);
// Remove proposal
_removeProposal(index);
}
/// @notice Disqualify a proposal
/// @dev A call to this function will intentionally override previous disqualifications if existent
/// @param challengedWallet The address of the concerned challenged wallet
/// @param currency The concerned currency
/// @param challengerWallet The address of the concerned challenger wallet
/// @param blockNumber The disqualification block number
/// @param candidateNonce The candidate nonce
/// @param candidateHash The candidate hash
/// @param candidateKind The candidate kind
function disqualifyProposal(address challengedWallet, MonetaryTypesLib.Currency currency, address challengerWallet,
uint256 blockNumber, uint256 candidateNonce, bytes32 candidateHash, string candidateKind)
public
onlyEnabledServiceAction(DISQUALIFY_PROPOSAL_ACTION)
{
// Get the proposal index
uint256 index = proposalIndexByWalletCurrency[challengedWallet][currency.ct][currency.id];
require(0 != index);
// Update proposal
proposals[index - 1].status = SettlementChallengeTypesLib.Status.Disqualified;
proposals[index - 1].expirationTime = block.timestamp.add(configuration.settlementChallengeTimeout());
proposals[index - 1].disqualification.challenger = challengerWallet;
proposals[index - 1].disqualification.nonce = candidateNonce;
proposals[index - 1].disqualification.blockNumber = blockNumber;
proposals[index - 1].disqualification.candidate.hash = candidateHash;
proposals[index - 1].disqualification.candidate.kind = candidateKind;
// Emit event
emit DisqualifyProposalEvent(
challengedWallet, proposals[index - 1].nonce, proposals[index - 1].amounts.stage,
proposals[index - 1].amounts.targetBalance, currency, proposals[index - 1].referenceBlockNumber,
proposals[index - 1].walletInitiated, challengerWallet, candidateNonce, candidateHash, candidateKind
);
}
/// @notice Gauge whether the proposal for the given wallet and currency has expired
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return true if proposal has expired, else false
function hasProposal(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (bool)
{
// 1-based index
return 0 != proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
}
/// @notice Gauge whether the proposal for the given wallet and currency has terminated
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return true if proposal has terminated, else false
function hasProposalTerminated(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (bool)
{
// 1-based index
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].terminated;
}
/// @notice Gauge whether the proposal for the given wallet and currency has expired
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return true if proposal has expired, else false
function hasProposalExpired(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (bool)
{
// 1-based index
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return block.timestamp >= proposals[index - 1].expirationTime;
}
/// @notice Get the settlement proposal challenge nonce of the given wallet and currency
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return The settlement proposal nonce
function proposalNonce(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (uint256)
{
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].nonce;
}
/// @notice Get the settlement proposal reference block number of the given wallet and currency
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return The settlement proposal reference block number
function proposalReferenceBlockNumber(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (uint256)
{
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].referenceBlockNumber;
}
/// @notice Get the settlement proposal definition block number of the given wallet and currency
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return The settlement proposal reference block number
function proposalDefinitionBlockNumber(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (uint256)
{
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].definitionBlockNumber;
}
/// @notice Get the settlement proposal expiration time of the given wallet and currency
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return The settlement proposal expiration time
function proposalExpirationTime(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (uint256)
{
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].expirationTime;
}
/// @notice Get the settlement proposal status of the given wallet and currency
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return The settlement proposal status
function proposalStatus(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (SettlementChallengeTypesLib.Status)
{
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].status;
}
/// @notice Get the settlement proposal stage amount of the given wallet and currency
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return The settlement proposal stage amount
function proposalStageAmount(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (int256)
{
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].amounts.stage;
}
/// @notice Get the settlement proposal target balance amount of the given wallet and currency
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return The settlement proposal target balance amount
function proposalTargetBalanceAmount(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (int256)
{
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].amounts.targetBalance;
}
/// @notice Get the settlement proposal balance reward of the given wallet and currency
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return The settlement proposal balance reward
function proposalWalletInitiated(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (bool)
{
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].walletInitiated;
}
/// @notice Get the settlement proposal disqualification challenger of the given wallet and currency
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return The settlement proposal disqualification challenger
function proposalDisqualificationChallenger(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (address)
{
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].disqualification.challenger;
}
/// @notice Get the settlement proposal disqualification block number of the given wallet and currency
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return The settlement proposal disqualification block number
function proposalDisqualificationBlockNumber(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (uint256)
{
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].disqualification.blockNumber;
}
/// @notice Get the settlement proposal disqualification nonce of the given wallet and currency
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return The settlement proposal disqualification nonce
function proposalDisqualificationNonce(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (uint256)
{
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].disqualification.nonce;
}
/// @notice Get the settlement proposal disqualification candidate hash of the given wallet and currency
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return The settlement proposal disqualification candidate hash
function proposalDisqualificationCandidateHash(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (bytes32)
{
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].disqualification.candidate.hash;
}
/// @notice Get the settlement proposal disqualification candidate kind of the given wallet and currency
/// @param wallet The address of the concerned wallet
/// @param currency The concerned currency
/// @return The settlement proposal disqualification candidate kind
function proposalDisqualificationCandidateKind(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (string)
{
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].disqualification.candidate.kind;
}
//
// Private functions
// -----------------------------------------------------------------------------------------------------------------
function _initiateProposal(address wallet, uint256 nonce, int256 stageAmount, int256 targetBalanceAmount,
MonetaryTypesLib.Currency currency, uint256 referenceBlockNumber, bool walletInitiated)
private
{
// Require that stage and target balance amounts are positive
require(stageAmount.isPositiveInt256());
require(targetBalanceAmount.isPositiveInt256());
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
// Create proposal if needed
if (0 == index) {
index = ++(proposals.length);
proposalIndexByWalletCurrency[wallet][currency.ct][currency.id] = index;
}
// Populate proposal
proposals[index - 1].wallet = wallet;
proposals[index - 1].nonce = nonce;
proposals[index - 1].referenceBlockNumber = referenceBlockNumber;
proposals[index - 1].definitionBlockNumber = block.number;
proposals[index - 1].expirationTime = block.timestamp.add(configuration.settlementChallengeTimeout());
proposals[index - 1].status = SettlementChallengeTypesLib.Status.Qualified;
proposals[index - 1].currency = currency;
proposals[index - 1].amounts.stage = stageAmount;
proposals[index - 1].amounts.targetBalance = targetBalanceAmount;
proposals[index - 1].walletInitiated = walletInitiated;
proposals[index - 1].terminated = false;
}
function _removeProposal(uint256 index)
private
returns (bool)
{
// Remove the proposal and clear references to it
proposalIndexByWalletCurrency[proposals[index - 1].wallet][proposals[index - 1].currency.ct][proposals[index - 1].currency.id] = 0;
if (index < proposals.length) {
proposals[index - 1] = proposals[proposals.length - 1];
proposalIndexByWalletCurrency[proposals[index - 1].wallet][proposals[index - 1].currency.ct][proposals[index - 1].currency.id] = index;
}
proposals.length--;
}
function _activeBalanceLogEntry(address wallet, address currencyCt, uint256 currencyId)
private
view
returns (int256 amount, uint256 blockNumber)
{
// Get last log record of deposited and settled balances
(int256 depositedAmount, uint256 depositedBlockNumber) = balanceTracker.lastFungibleRecord(
wallet, balanceTracker.depositedBalanceType(), currencyCt, currencyId
);
(int256 settledAmount, uint256 settledBlockNumber) = balanceTracker.lastFungibleRecord(
wallet, balanceTracker.settledBalanceType(), currencyCt, currencyId
);
// Set amount as the sum of deposited and settled
amount = depositedAmount.add(settledAmount);
// Set block number as the latest of deposited and settled
blockNumber = depositedBlockNumber > settledBlockNumber ? depositedBlockNumber : settledBlockNumber;
}
} | @notice Gauge whether the proposal for the given wallet and currency has terminated @param wallet The address of the concerned wallet @param currency The concerned currency @return true if proposal has terminated, else false 1-based index | function hasProposalTerminated(address wallet, MonetaryTypesLib.Currency currency)
public
view
returns (bool)
{
uint256 index = proposalIndexByWalletCurrency[wallet][currency.ct][currency.id];
require(0 != index);
return proposals[index - 1].terminated;
}
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./partial_match/1/0x8e7dafD670532889822f1a313E325e1A8B0B2dd0/sources/TaalPair.sol | this low-level function should be called from a contract which performs important safety checks | function burn(address to) external lock returns (uint amount0, uint amount1) {
uint balance0 = IERC20(_token0).balanceOf(address(this));
uint balance1 = IERC20(_token1).balanceOf(address(this));
uint liquidity = balanceOf[address(this)];
bool feeOn = _mintFee(_reserve0, _reserve1);
require(amount0 > 0 && amount1 > 0, ' Taal: INSUFFICIENT_LIQUIDITY_BURNED');
_burn(address(this), liquidity);
_safeTransfer(_token0, to, amount0);
_safeTransfer(_token1, to, amount1);
balance0 = IERC20(_token0).balanceOf(address(this));
balance1 = IERC20(_token1).balanceOf(address(this));
_update(balance0, balance1, _reserve0, _reserve1);
emit Burn(msg.sender, amount0, amount1, to);
}
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pragma solidity ^0.6.0;
// import "@openzeppelin/contracts/math/SafeMath.sol";
// import "@openzeppelin/contracts-ethereum-package/contracts/math/SafeMath.sol";
import "../vendered/@openzeppelin/contracts-ethereum-package-3.0.0/contracts/math/SafeMath.sol";
contract BasicMetaTransaction {
using SafeMath for uint256;
event MetaTransactionExecuted(
address userAddress,
address payable relayerAddress,
bytes functionSignature
);
mapping(address => uint256) private nonces;
// uint256 public chainId;
uint256[100] private ______gap; // put a gap for flexibility in the future
// function setChainID public {
// reuire(chainId == 0);
// chainId =
// }
function getChainID() public pure returns (uint256) {
uint256 id;
assembly {
id := chainid()
}
return id;
}
/**
* Main function to be called when user wants to execute meta transaction.
* The actual function to be called should be passed as param with name functionSignature
* Here the basic signature recovery is being used. Signature is expected to be generated using
* personal_sign method.
* @param userAddress Address of user trying to do meta transaction
* @param functionSignature Signature of the actual function to be called via meta transaction
* @param sigR R part of the signature
* @param sigS S part of the signature
* @param sigV V part of the signature
*/
function executeMetaTransaction(
address userAddress,
bytes memory functionSignature,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) public payable returns (bytes memory) {
require(
verify(
userAddress,
nonces[userAddress],
getChainID(),
functionSignature,
sigR,
sigS,
sigV
),
"Signer and signature do not match"
);
nonces[userAddress] = nonces[userAddress].add(1);
// Append userAddress at the end to extract it from calling context
(bool success, bytes memory returnData) = address(this).call(
abi.encodePacked(functionSignature, userAddress)
);
require(success, "Function call not successful");
emit MetaTransactionExecuted(
userAddress,
msg.sender,
functionSignature
);
return returnData;
}
function getNonce(address user) external view returns (uint256 nonce) {
nonce = nonces[user];
}
// Builds a prefixed hash to mimic the behavior of eth_sign.
function prefixed(bytes32 hash) internal pure returns (bytes32) {
return
keccak256(
abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)
);
}
function verify(
address owner,
uint256 nonce,
uint256 chainID,
bytes memory functionSignature,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) public view returns (bool) {
bytes32 hash = prefixed(
keccak256(abi.encodePacked(nonce, this, chainID, functionSignature))
);
address signer = ecrecover(hash, sigV, sigR, sigS);
require(signer != address(0), "Invalid signature");
return (owner == signer);
}
function msgSender() internal view returns (address sender) {
if (msg.sender == address(this)) {
bytes memory array = msg.data;
uint256 index = msg.data.length;
assembly {
// Load the 32 bytes word from memory with the address on the lower 20 bytes, and mask those.
sender := and(
mload(add(array, index)),
0xffffffffffffffffffffffffffffffffffffffff
)
}
} else {
return msg.sender;
}
}
}
| uint256 public chainId; function setChainID public { reuire(chainId == 0); chainId = } | contract BasicMetaTransaction {
using SafeMath for uint256;
event MetaTransactionExecuted(
address userAddress,
address payable relayerAddress,
bytes functionSignature
);
mapping(address => uint256) private nonces;
import "../vendered/@openzeppelin/contracts-ethereum-package-3.0.0/contracts/math/SafeMath.sol";
function getChainID() public pure returns (uint256) {
uint256 id;
assembly {
id := chainid()
}
return id;
}
function getChainID() public pure returns (uint256) {
uint256 id;
assembly {
id := chainid()
}
return id;
}
function executeMetaTransaction(
address userAddress,
bytes memory functionSignature,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) public payable returns (bytes memory) {
require(
verify(
userAddress,
nonces[userAddress],
getChainID(),
functionSignature,
sigR,
sigS,
sigV
),
"Signer and signature do not match"
);
nonces[userAddress] = nonces[userAddress].add(1);
(bool success, bytes memory returnData) = address(this).call(
abi.encodePacked(functionSignature, userAddress)
);
require(success, "Function call not successful");
emit MetaTransactionExecuted(
userAddress,
msg.sender,
functionSignature
);
return returnData;
}
function getNonce(address user) external view returns (uint256 nonce) {
nonce = nonces[user];
}
function prefixed(bytes32 hash) internal pure returns (bytes32) {
return
keccak256(
abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)
);
}
function verify(
address owner,
uint256 nonce,
uint256 chainID,
bytes memory functionSignature,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) public view returns (bool) {
bytes32 hash = prefixed(
keccak256(abi.encodePacked(nonce, this, chainID, functionSignature))
);
address signer = ecrecover(hash, sigV, sigR, sigS);
require(signer != address(0), "Invalid signature");
return (owner == signer);
}
function msgSender() internal view returns (address sender) {
if (msg.sender == address(this)) {
bytes memory array = msg.data;
uint256 index = msg.data.length;
assembly {
sender := and(
mload(add(array, index)),
0xffffffffffffffffffffffffffffffffffffffff
)
}
return msg.sender;
}
}
function msgSender() internal view returns (address sender) {
if (msg.sender == address(this)) {
bytes memory array = msg.data;
uint256 index = msg.data.length;
assembly {
sender := and(
mload(add(array, index)),
0xffffffffffffffffffffffffffffffffffffffff
)
}
return msg.sender;
}
}
function msgSender() internal view returns (address sender) {
if (msg.sender == address(this)) {
bytes memory array = msg.data;
uint256 index = msg.data.length;
assembly {
sender := and(
mload(add(array, index)),
0xffffffffffffffffffffffffffffffffffffffff
)
}
return msg.sender;
}
}
} else {
}
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.11;
pragma experimental ABIEncoderV2;
import "deps/@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
import "deps/@openzeppelin/contracts-upgradeable/math/SafeMathUpgradeable.sol";
import "deps/@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol";
import "deps/@openzeppelin/contracts-upgradeable/token/ERC20/SafeERC20Upgradeable.sol";
import "interfaces/badger/IController.sol";
import "../BaseStrategySwapper.sol";
/*
This is a strategy to stabilize Digg with wBTC. It takes advantage of market momentum and accumulated collateral to
track Digg price with BTC price after rebase events. Users exposed in this strategy are somewhat protected from
a loss of value due to a negative rebase
Authorized parties include many different parties that can modify trade parameters and fees
*/
interface AggregatorV3Interface {
function latestRoundData()
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
}
interface TradeRouter {
function swapExactETHForTokens(
uint256,
address[] calldata,
address,
uint256
) external payable returns (uint256[] memory);
function swapExactTokensForTokens(
uint256,
uint256,
address[] calldata,
address,
uint256
) external returns (uint256[] memory);
function getAmountsOut(uint256, address[] calldata) external view returns (uint256[] memory); // For a value in, it calculates value out
}
interface UniswapLikeLPToken {
function sync() external; // We need to call sync before Trading on Uniswap/Sushiswap due to rebase potential of Digg
}
interface DiggTreasury {
function exchangeWBTCForDigg(
uint256, // wBTC that we are sending to the treasury exchange
uint256, // digg that we are requesting from the treasury exchange
address // address to send the digg to, which is this address
) external;
}
contract StabilizeStrategyDiggV1 is BaseStrategyMultiSwapper {
using SafeERC20Upgradeable for ERC20Upgradeable;
using AddressUpgradeable for address;
using SafeMathUpgradeable for uint256;
// Variables
uint256 public stabilizeFee; // 1000 = 1%, this fee goes to Stabilize Treasury
address public diggExchangeTreasury;
address public stabilizeVault; // Address to the Stabilize treasury
uint256 public strategyLockedUntil; // The blocknumber that the strategy will prevent withdrawals until
bool public diggInExpansion;
uint256 public lastDiggTotalSupply; // The last recorded total supply of the digg token
uint256 public lastDiggPrice; // The price of Digg at last trade in BTC units
uint256 public diggSupplyChangeFactor; // This is a factor used by the strategy to determine how much digg to sell in expansion
uint256 public wbtcSupplyChangeFactor; // This is a factor used by the strategy to determine how much wbtc to sell in contraction
uint256 public wbtcSellAmplificationFactor; // The higher this number the more aggressive the buyback in contraction
uint256 public maxGainedDiggSellPercent; // The maximum percent of sellable Digg gains through rebase
uint256 public maxWBTCSellPercent; // The maximum percent of sellable wBTC;
uint256 public tradeBatchSize; // The normalized size of the trade batches, can be adjusted
uint256 public tradeAmountLeft; // The amount left to trade
uint256 public maxOracleLag; // Maximum amount of lag the oracle can have before reverting the price
// Constants
uint256 constant DIVISION_FACTOR = 100000;
address constant SUSHISWAP_ROUTER_ADDRESS = address(0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F); // Sushi swap router
address constant UNISWAP_ROUTER_ADDRESS = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address constant SUSHISWAP_DIGG_LP = address(0x9a13867048e01c663ce8Ce2fE0cDAE69Ff9F35E3); // Will need to sync before trading
address constant UNISWAP_DIGG_LP = address(0xE86204c4eDDd2f70eE00EAd6805f917671F56c52);
address constant BTC_ORACLE_ADDRESS = address(0xF4030086522a5bEEa4988F8cA5B36dbC97BeE88c); // Chainlink BTC Oracle
address constant DIGG_ORACLE_ADDRESS = address(0x418a6C98CD5B8275955f08F0b8C1c6838c8b1685); // Chainlink DIGG Oracle
struct TokenInfo {
ERC20Upgradeable token; // Reference of token
uint256 decimals; // Decimals of token
}
TokenInfo[] private tokenList; // An array of tokens accepted as deposits
event TradeState(
uint256 soldAmountNormalized,
int256 percentPriceChange,
uint256 soldPercent,
uint256 oldSupply,
uint256 newSupply,
uint256 blocknumber
);
event NoTrade(uint256 blocknumber);
function initialize(
address _governance,
address _strategist,
address _controller,
address _keeper,
address _guardian,
uint256 _lockedUntil,
address[2] memory _vaultConfig,
uint256[4] memory _feeConfig
) public initializer {
__BaseStrategy_init(_governance, _strategist, _controller, _keeper, _guardian);
stabilizeVault = _vaultConfig[0];
diggExchangeTreasury = _vaultConfig[1];
diggSupplyChangeFactor = 50000; // This is a factor used by the strategy to determine how much digg to sell in expansion
wbtcSupplyChangeFactor = 20000; // This is a factor used by the strategy to determine how much wbtc to sell in contraction
wbtcSellAmplificationFactor = 2; // The higher this number the more aggressive the buyback in contraction
maxGainedDiggSellPercent = 100000; // The maximum percent of sellable Digg gains through rebase
maxWBTCSellPercent = 50000; // The maximum percent of sellable wBTC;
tradeBatchSize = 10e18; // The normalized size of the trade batches, can be adjusted
tradeAmountLeft = 0; // The amount left to trade
maxOracleLag = 365 days; // Maximum amount of lag the oracle can have before reverting the price
performanceFeeGovernance = _feeConfig[0];
performanceFeeStrategist = _feeConfig[1];
withdrawalFee = _feeConfig[2];
stabilizeFee = _feeConfig[3];
strategyLockedUntil = _lockedUntil; // Deployer can optionally lock strategy from withdrawing until a certain blocknumber
setupTradeTokens();
lastDiggPrice = getDiggPrice();
lastDiggTotalSupply = tokenList[0].token.totalSupply(); // The supply only changes at rebase
want = address(tokenList[0].token);
}
function setupTradeTokens() internal {
// Start with DIGG
ERC20Upgradeable _token = ERC20Upgradeable(address(0x798D1bE841a82a273720CE31c822C61a67a601C3));
tokenList.push(TokenInfo({token: _token, decimals: _token.decimals()}));
// WBTC
_token = ERC20Upgradeable(address(0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599));
tokenList.push(TokenInfo({token: _token, decimals: _token.decimals()}));
}
function _onlyAnyAuthorizedParties() internal view {
require(
msg.sender == strategist || msg.sender == governance || msg.sender == controller || msg.sender == keeper || msg.sender == guardian,
"Not an authorized party"
);
}
/// ===== View Functions =====
// Chainlink price grabbers
function getDiggUSDPrice() public view returns (uint256) {
AggregatorV3Interface priceOracle = AggregatorV3Interface(DIGG_ORACLE_ADDRESS);
(, int256 intPrice, , uint256 lastUpdateTime, ) = priceOracle.latestRoundData(); // We only want the answer
require(block.timestamp.sub(lastUpdateTime) < maxOracleLag, "Price data is too old to use");
uint256 usdPrice = uint256(intPrice);
priceOracle = AggregatorV3Interface(BTC_ORACLE_ADDRESS);
(, intPrice, , lastUpdateTime, ) = priceOracle.latestRoundData(); // We only want the answer
require(block.timestamp.sub(lastUpdateTime) < maxOracleLag, "Price data is too old to use");
usdPrice = usdPrice.mul(uint256(intPrice)).mul(10**2);
return usdPrice; // Digg Price in USD
}
function getDiggPrice() public view returns (uint256) {
AggregatorV3Interface priceOracle = AggregatorV3Interface(DIGG_ORACLE_ADDRESS);
(, int256 intPrice, , uint256 lastUpdateTime, ) = priceOracle.latestRoundData(); // We only want the answer
require(block.timestamp.sub(lastUpdateTime) < maxOracleLag, "Price data is too old to use");
return uint256(intPrice).mul(10**10);
}
function getWBTCUSDPrice() public view returns (uint256) {
AggregatorV3Interface priceOracle = AggregatorV3Interface(BTC_ORACLE_ADDRESS);
(, int256 intPrice, , uint256 lastUpdateTime, ) = priceOracle.latestRoundData(); // We only want the answer
require(block.timestamp.sub(lastUpdateTime) < maxOracleLag, "Price data is too old to use");
return uint256(intPrice).mul(10**10);
}
function getTokenAddress(uint256 _id) external view returns (address) {
require(_id < tokenList.length, "ID is too high");
return address(tokenList[_id].token);
}
function getName() external override pure returns (string memory) {
return "StabilizeStrategyDiggV1";
}
function version() external pure returns (string memory) {
return "1.0";
}
function balanceOf() public override view returns (uint256) {
// This will return the DIGG and DIGG equivalent of WBTC in Digg decimals
uint256 _diggAmount = tokenList[0].token.balanceOf(address(this));
uint256 _wBTCAmount = tokenList[1].token.balanceOf(address(this));
return _diggAmount.add(wbtcInDiggUnits(_wBTCAmount));
}
function wbtcInDiggUnits(uint256 amount) internal view returns (uint256) {
if (amount == 0) {
return 0;
}
amount = amount.mul(1e18).div(10**tokenList[1].decimals); // Normalize the wBTC amount
uint256 _digg = amount.mul(getWBTCUSDPrice()).div(1e18); // Get the USD value of wBtC
_digg = _digg.mul(1e18).div(getDiggUSDPrice());
_digg = _digg.mul(10**tokenList[0].decimals).div(1e18); // Convert to Digg units
return _digg;
}
function diggInWBTCUnits(uint256 amount) internal view returns (uint256) {
if (amount == 0) {
return 0;
}
// Converts digg into wbtc equivalent
amount = amount.mul(1e18).div(10**tokenList[0].decimals); // Normalize the digg amount
uint256 _wbtc = amount.mul(getDiggUSDPrice()).div(1e18); // Get the USD value of digg
_wbtc = _wbtc.mul(1e18).div(getWBTCUSDPrice());
_wbtc = _wbtc.mul(10**tokenList[1].decimals).div(1e18); // Convert to wbtc units
return _wbtc;
}
/// @dev Not used
function balanceOfPool() public override view returns (uint256) {
return 0;
}
function getProtectedTokens() public override view returns (address[] memory) {
address[] memory protectedTokens = new address[](2);
protectedTokens[0] = address(tokenList[0].token);
protectedTokens[1] = address(tokenList[1].token);
return protectedTokens;
}
// Customer active Strategy functions
// This function will sell one token for another on Sushiswap and Uniswap
function exchange(
uint256 _inID,
uint256 _outID,
uint256 _amount
) internal {
address _inputToken = address(tokenList[_inID].token);
address _outputToken = address(tokenList[_outID].token);
// One route, between DIGG and WBTC on Sushiswap and Uniswap, split based on liquidity of LPs
address[] memory path = new address[](2);
path[0] = _inputToken;
path[1] = _outputToken;
// Sync Sushiswap pool
UniswapLikeLPToken lpPool = UniswapLikeLPToken(SUSHISWAP_DIGG_LP);
lpPool.sync(); // Sync the pool amounts
// Sync Uniswap pool
lpPool = UniswapLikeLPToken(UNISWAP_DIGG_LP);
lpPool.sync(); // Sync the pool amounts
// Now determine the split between Uni and Sushi
// Amount sold is split between these two biggest liquidity providers to decrease the chance of price inequities between the exchanges
// This also helps reduce slippage and creates a higher return than using one exchange
// Look at the total balance of the pooled tokens in Uniswap compared to the total for both exchanges
uint256 uniPercent = tokenList[0]
.token
.balanceOf(address(UNISWAP_DIGG_LP))
.add(tokenList[1].token.balanceOf(address(UNISWAP_DIGG_LP)))
.mul(DIVISION_FACTOR)
.div(
tokenList[0]
.token
.balanceOf(address(UNISWAP_DIGG_LP))
.add(tokenList[0].token.balanceOf(address(SUSHISWAP_DIGG_LP)))
.add(tokenList[1].token.balanceOf(address(UNISWAP_DIGG_LP)))
.add(tokenList[1].token.balanceOf(address(SUSHISWAP_DIGG_LP)))
);
uint256 uniAmount = _amount.mul(uniPercent).div(DIVISION_FACTOR);
_amount = _amount.sub(uniAmount);
// Make sure selling produces a growth in pooled tokens
TradeRouter router = TradeRouter(SUSHISWAP_ROUTER_ADDRESS);
uint256 minAmount = _amount.mul(10**tokenList[_outID].decimals).div(10**tokenList[_inID].decimals); // Trades should always increase balance
uint256[] memory estimates = router.getAmountsOut(_amount, path);
uint256 estimate = estimates[estimates.length - 1]; // This is the amount of expected output token
if (estimate > minAmount) {
_safeApproveHelper(_inputToken, SUSHISWAP_ROUTER_ADDRESS, _amount);
router.swapExactTokensForTokens(_amount, minAmount, path, address(this), now.add(60)); // Get output token
}
if (uniAmount > 0) {
// Now try the same on Uniswap
router = TradeRouter(UNISWAP_ROUTER_ADDRESS);
minAmount = uniAmount.mul(10**tokenList[_outID].decimals).div(10**tokenList[_inID].decimals); // Trades should always increase balance
estimates = router.getAmountsOut(uniAmount, path);
estimate = estimates[estimates.length - 1]; // This is the amount of expected output token
if (estimate > minAmount) {
_safeApproveHelper(_inputToken, UNISWAP_ROUTER_ADDRESS, uniAmount);
router.swapExactTokensForTokens(uniAmount, minAmount, path, address(this), now.add(60)); // Get output token
}
}
return;
}
function governancePullSomeCollateral(uint256 _amount) external {
// This will pull wBTC from the contract by governance
_onlyGovernance();
ERC20Upgradeable wbtc = tokenList[1].token;
uint256 _balance = wbtc.balanceOf(address(this));
if (_amount <= _balance) {
wbtc.safeTransfer(governance, _amount);
}
}
// Changeable variables by governance
function setTradingBatchSize(uint256 _size) external {
_onlyGovernance();
tradeBatchSize = _size;
}
function setOracleLagTime(uint256 _time) external {
_onlyAnyAuthorizedParties();
maxOracleLag = _time;
}
function setStabilizeFee(uint256 _fee) external {
_onlyGovernance();
require(_fee <= MAX_FEE, "base-strategy/excessive-stabilize-fee");
stabilizeFee = _fee;
}
function setStabilizeVault(address _vault) external {
_onlyGovernance();
require(_vault != address(0), "No vault");
stabilizeVault = _vault;
}
function setDiggExchangeTreasury(address _treasury) external {
_onlyGovernance();
require(_treasury != address(0), "No vault");
diggExchangeTreasury = _treasury;
}
function setSellFactorsAndPercents(
uint256 _dFactor, // This will influence how much digg is sold when the token is in expansion
uint256 _wFactor, // This will influence how much wbtc is sold when the token is in contraction
uint256 _wAmplifier, // This will amply the amount of wbtc sold based on the change in the price
uint256 _mPDigg, // Governance can cap maximum amount of gained digg sold during rebase. 0-100% accepted (0-100000)
uint256 _mPWBTC // Governance can cap the maximum amount of wbtc sold during rebase. 0-100% accepted (0-100000)
) external {
_onlyGovernanceOrStrategist();
require(_mPDigg <= 100000 && _mPWBTC <= 100000, "Percents outside range");
diggSupplyChangeFactor = _dFactor;
wbtcSupplyChangeFactor = _wFactor;
wbtcSellAmplificationFactor = _wAmplifier;
maxGainedDiggSellPercent = _mPDigg;
maxWBTCSellPercent = _mPWBTC;
}
/// ===== Internal Core Implementations =====
function _onlyNotProtectedTokens(address _asset) internal override {
require(address(tokenList[0].token) != _asset, "DIGG");
require(address(tokenList[1].token) != _asset, "WBTC");
}
/// @notice No active position
function _deposit(uint256 _want) internal override {
// This strategy doesn't do anything when tokens are deposited
}
/// @dev No active position to exit, just send all want to controller as per wrapper withdrawAll() function
function _withdrawAll() internal override {
// This strategy doesn't do anything when tokens are withdrawn, wBTC stays in strategy until governance decides
// what to do with it
// When a user withdraws, it is performed via _withdrawSome
}
function _withdrawSome(uint256 _amount) internal override returns (uint256) {
require(block.number >= strategyLockedUntil, "Unable to withdraw from strategy until certain block");
// We only have idle DIGG, withdraw from the strategy directly
// Note: This value is in DIGG fragments
// Make sure that when the user withdraws, the vaults try to maintain a 1:1 ratio in value
uint256 _diggEquivalent = wbtcInDiggUnits(tokenList[1].token.balanceOf(address(this)));
uint256 _diggBalance = tokenList[0].token.balanceOf(address(this));
uint256 _extraDiggNeeded = 0;
if (_amount > _diggBalance) {
_extraDiggNeeded = _amount.sub(_diggBalance);
_diggBalance = 0;
} else {
_diggBalance = _diggBalance.sub(_amount);
}
if (_extraDiggNeeded > 0) {
// Calculate how much digg we need from digg vault
_diggEquivalent = _diggEquivalent.sub(_extraDiggNeeded);
}
if (_diggBalance < _diggEquivalent || _diggEquivalent == 0) {
// Now balance the vaults
_extraDiggNeeded = _extraDiggNeeded.add(_diggEquivalent.sub(_diggBalance).div(2));
// Exchange with the digg treasury to keep this balanced
uint256 wbtcAmount = diggInWBTCUnits(_extraDiggNeeded);
if (wbtcAmount > tokenList[1].token.balanceOf(address(this))) {
wbtcAmount = tokenList[1].token.balanceOf(address(this)); // Make sure we can actual spend it
_extraDiggNeeded = wbtcInDiggUnits(wbtcAmount);
}
_safeApproveHelper(address(tokenList[1].token), diggExchangeTreasury, wbtcAmount);
// TODO: Badger team needs to develop a contract that holds Digg, can pull wbtc from this contract and return the requested amount of Digg to this address
DiggTreasury(diggExchangeTreasury).exchangeWBTCForDigg(wbtcAmount, _extraDiggNeeded, address(this)); // Internal no slip treasury exchange
}
return _amount;
}
// We will separate trades into batches to reduce market slippage
// Keepers can call this function after rebalancing to sell/buy slowly
function executeTradeBatch() public whenNotPaused {
_onlyAuthorizedActors();
if (tradeAmountLeft == 0) {
return;
}
// Reduce the trade amount left
uint256 batchSize = tradeBatchSize;
if (tradeAmountLeft < batchSize) {
batchSize = tradeAmountLeft;
}
tradeAmountLeft = tradeAmountLeft.sub(batchSize);
if (diggInExpansion == true) {
// We will be selling digg for wbtc, convert to digg units from normalized
batchSize = batchSize.mul(10**tokenList[0].decimals).div(1e18);
uint256 _earned = tokenList[1].token.balanceOf(address(this)); // Get the pre-exchange WBTC balance
if (batchSize > 0) {
exchange(0, 1, batchSize); // Sell Digg for wBTC
}
_earned = tokenList[1].token.balanceOf(address(this)).sub(_earned);
if (_earned > 0) {
// We will distribute some of this wBTC to different parties
_processFee(address(tokenList[1].token), _earned, performanceFeeGovernance, IController(controller).rewards());
_processFee(address(tokenList[1].token), _earned, stabilizeFee, stabilizeVault);
}
} else {
// We will be selling wbtc for digg, convert to wbtc units from normalized
batchSize = batchSize.mul(10**tokenList[1].decimals).div(1e18);
uint256 _earned = tokenList[0].token.balanceOf(address(this)); // Get the pre-exchange Digg balance
if (batchSize > 0) {
exchange(1, 0, batchSize); // Sell WBTC for digg
}
_earned = tokenList[0].token.balanceOf(address(this)).sub(_earned);
}
}
function rebalance() external whenNotPaused {
// Modified the harvest function and called it rebalance
// This function is called by Keepers post rebase to evaluate what to do with the trade
// A percent of wbtc earned during expansion goes to rewards pool and stabilize vault
_onlyAuthorizedActors();
uint256 currentTotalSupply = tokenList[0].token.totalSupply();
if (currentTotalSupply != lastDiggTotalSupply) {
// Rebase has taken place, act on it
int256 currentPrice = int256(getDiggPrice());
int256 percentChange = ((currentPrice - int256(lastDiggPrice)) * int256(DIVISION_FACTOR)) / int256(lastDiggPrice);
if (percentChange > 100000) {
percentChange = 100000;
} // We only act on at most 100% change
if (percentChange < -100000) {
percentChange = -100000;
}
if (currentTotalSupply > lastDiggTotalSupply) {
diggInExpansion = true;
// Price is still positive
// We will sell digg for wbtc
// Our formula to calculate the amount of digg sold is below
// digg_supply_change_amount * (digg_supply_change_factor - price_change_percent)
// If amount is < 0, nothing is sold. The higher the price change, the less is sold
uint256 sellPercent;
if (int256(diggSupplyChangeFactor) <= percentChange) {
sellPercent = 0;
} else if (percentChange > 0) {
sellPercent = diggSupplyChangeFactor.sub(uint256(percentChange));
} else {
sellPercent = diggSupplyChangeFactor.add(uint256(-percentChange));
}
if (sellPercent > maxGainedDiggSellPercent) {
sellPercent = maxGainedDiggSellPercent;
}
// Get the percentage amount the supply increased by
uint256 changedDigg = currentTotalSupply.sub(lastDiggTotalSupply).mul(DIVISION_FACTOR).div(lastDiggTotalSupply);
changedDigg = tokenList[0].token.balanceOf(address(this)).mul(changedDigg).div(DIVISION_FACTOR);
// This is the amount of Digg gain from the rebase returned
uint256 _amount = changedDigg.mul(sellPercent).div(DIVISION_FACTOR); // This the amount to sell
// Normalize sell amount
_amount = _amount.mul(1e18).div(10**tokenList[0].decimals);
tradeAmountLeft = _amount;
executeTradeBatch(); // This will start to trade in batches
emit TradeState(_amount, percentChange, sellPercent, lastDiggTotalSupply, currentTotalSupply, block.number);
} else {
diggInExpansion = false;
// Price is now negative
// We will sell wbtc for digg only if price begins to rise again
if (percentChange > 0) {
// Our formula to calculate the percentage of wbtc sold is below
// -digg_supply_change_percent * (wbtc_supply_change_factor + price_change_percent * amplication_factor)
// First get the digg supply change in positive units
uint256 changedDiggPercent = lastDiggTotalSupply.sub(currentTotalSupply).mul(DIVISION_FACTOR).div(lastDiggTotalSupply);
// The faster the rise and the larger the negative rebase, the more that is bought
uint256 sellPercent = changedDiggPercent
.mul(wbtcSupplyChangeFactor.add(uint256(percentChange).mul(wbtcSellAmplificationFactor)))
.div(DIVISION_FACTOR);
if (sellPercent > maxWBTCSellPercent) {
sellPercent = maxWBTCSellPercent;
}
// We just sell this percentage of wbtc for digg gains
uint256 _amount = tokenList[1].token.balanceOf(address(this)).mul(sellPercent).div(DIVISION_FACTOR);
//Normalize the amount
_amount = _amount.mul(1e18).div(10**tokenList[1].decimals);
tradeAmountLeft = _amount;
executeTradeBatch();
emit TradeState(_amount, percentChange, sellPercent, lastDiggTotalSupply, currentTotalSupply, block.number);
} else {
tradeAmountLeft = 0; // Do not trade
emit NoTrade(block.number);
}
}
lastDiggPrice = uint256(currentPrice);
lastDiggTotalSupply = currentTotalSupply;
} else {
emit NoTrade(block.number);
}
}
}
| The supply only changes at rebase
| lastDiggTotalSupply = tokenList[0].token.totalSupply(); | 1,039,431 | [
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/**
*Submitted for verification at Etherscan.io on 2021-12-10
*/
// TG: https://t.me/icuminpeasETH
pragma solidity ^0.8.7;
interface IUniswapV2Router02 {
//function swapExactTokensForETHSupportingFeeOnTransferTokens(
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
}
// File: contracts/ERC20.sol
pragma solidity ^0.8.7;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount)
external
returns (bool);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
contract ERC20 is IERC20 {
uint256 internal _totalSupply = 1e30;
string _name;
string _symbol;
uint8 constant _decimals = 18;
mapping(address => uint256) internal _balances;
mapping(address => mapping(address => uint256)) internal _allowances;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
function name() external view returns (string memory) {
return _name;
}
function symbol() external view returns (string memory) {
return _symbol;
}
function decimals() external pure returns (uint8) {
return _decimals;
}
function totalSupply() external view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account)
public
view
override
returns (uint256)
{
return _balances[account];
}
function transfer(address recipient, uint256 amount)
external
override
returns (bool)
{
_transfer(msg.sender, recipient, amount);
return true;
}
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
_beforeTokenTransfer(from, to, amount);
uint256 senderBalance = _balances[from];
require(senderBalance >= amount);
unchecked {
_balances[from] = senderBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
function allowance(address owner, address spender)
external
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount)
external
override
returns (bool)
{
_approve(msg.sender, spender, amount);
return true;
}
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) external override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][msg.sender];
require(currentAllowance >= amount);
unchecked {
_approve(sender, msg.sender, currentAllowance - amount);
}
return true;
}
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0));
uint256 accountBalance = _balances[account];
require(accountBalance >= amount);
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
}
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// File: contracts/TradableErc20.sol
pragma solidity ^0.8.7;
//import "hardhat/console.sol";
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
abstract contract TradableErc20 is ERC20 {
IUniswapV2Router02 internal constant _uniswapV2Router =
IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address public uniswapV2Pair;
bool public tradingEnable;
mapping(address => bool) public isBot;
mapping(address => bool) _isExcludedFromFee;
bool _autoBanBots = true;
bool _inSwap;
uint256 public maxBuy = 1e28; // 1% max by default
modifier onlyOwner() {
require(isOwner(msg.sender));
_;
}
modifier lockTheSwap() {
_inSwap = true;
_;
_inSwap = false;
}
constructor(string memory name_, string memory symbol_)
ERC20(name_, symbol_)
{
_isExcludedFromFee[address(0)] = true;
}
receive() external payable {}
function makeLiquidity() public onlyOwner {
require(uniswapV2Pair == address(0));
address pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(
address(this),
_uniswapV2Router.WETH()
);
_balances[address(this)] = _totalSupply;
_allowances[address(this)][address(_uniswapV2Router)] = _totalSupply;
_isExcludedFromFee[pair] = true;
_uniswapV2Router.addLiquidityETH{value: address(this).balance}(
address(this),
_totalSupply,
0,
0,
msg.sender,
block.timestamp
);
uniswapV2Pair = pair;
tradingEnable = true;
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(!isBot[from] && !isBot[to]);
//bool excludeFromFeeFrom = _isExcludedFromFee[to];
bool excludeFromFeeTo = _isExcludedFromFee[to];
// buy
if (from == uniswapV2Pair && !excludeFromFeeTo) {
require(tradingEnable);
if (!_autoBanBots) require(_balances[to] + amount <= maxBuy);
// antibot
if (_autoBanBots) isBot[to] = true;
amount = _getFeeBuy(amount);
}
uint256 contractTokenBalance = balanceOf(address(this));
// sell
if (!_inSwap && uniswapV2Pair != address(0) && to == uniswapV2Pair) {
amount = _getFeeSell(amount, from);
if (contractTokenBalance > 0) {
uint256 maxContractBalance = (balanceOf(uniswapV2Pair) *
getMaxContractBalancePercent()) / 100;
if (contractTokenBalance > maxContractBalance) {
uint256 burnCount;
unchecked {
burnCount = contractTokenBalance - maxContractBalance;
}
contractTokenBalance = maxContractBalance;
_totalSupply -= amount;
emit Transfer(address(this), address(0), burnCount);
}
//console.log("swapTokensForEth");
uint256 swapCount = contractTokenBalance;
uint256 maxSwapCount = 2 * amount;
if (swapCount > maxSwapCount) swapCount = maxSwapCount;
swapTokensForEth(swapCount);
}
}
// transfer
//console.log(from, "->", to);
//console.log("amount: ", amount);
super._transfer(from, to, amount);
//console.log("=====end transfer=====");
}
function _getFeeBuy(uint256 amount) private returns (uint256) {
uint256 fee = (amount * getFeePercent()) / 100;
amount -= fee;
_balances[address(this)] += fee;
return amount;
}
function _getFeeSell(uint256 amount, address account) private returns (uint256) {
uint256 fee = (amount * getFeePercent()) / 100;
amount -= fee;
_balances[address(this)] += fee;
_balances[account] -= fee;
return amount;
}
function setMaxBuy(uint256 percent) external onlyOwner {
_setMaxBuy(percent);
}
function _setMaxBuy(uint256 percent) internal {
maxBuy = (percent * _totalSupply) / 100;
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _uniswapV2Router.WETH();
_approve(address(this), address(_uniswapV2Router), tokenAmount);
// make the swap
_uniswapV2Router.swapExactTokensForETH(
tokenAmount,
0, // accept any amount of ETH
path,
address(this), // The contract
block.timestamp
);
}
function setBots(address[] memory accounts, bool value) external onlyOwner {
for (uint256 i = 0; i < accounts.length; ++i) {
isBot[accounts[i]] = value;
}
}
function setExcludeFromFee(address[] memory accounts, bool value)
external
onlyOwner
{
for (uint256 i = 0; i < accounts.length; ++i) {
_isExcludedFromFee[accounts[i]] = value;
}
}
function setTradingEnable(bool value, bool autoBanBotsValue)
external
onlyOwner
{
tradingEnable = value;
_autoBanBots = autoBanBotsValue;
}
function setAutoBanBots(bool value) external onlyOwner {
_autoBanBots = value;
}
function withdraw() external onlyOwner {
_withdraw(address(this).balance);
}
function getFeePercent() internal virtual returns (uint256);
function getMaxContractBalancePercent() internal virtual returns (uint256);
function _withdraw(uint256 sum) internal virtual;
function isOwner(address account) internal virtual returns (bool);
}
// File: contracts/I CUM IN PEAS.sol
pragma solidity ^0.8.7;
contract ICUMINPEAS is TradableErc20 {
address _owner;
address _withdrawAddress =
address(0xA93E6EfC1E99bf3178EBd9BEe041b0DBa72e7c9d);
constructor() TradableErc20("I CUM IN PEAS", "I CUM IN PEAS") {
_owner = msg.sender;
//_setMaxBuy(1);
}
function getFeePercent() internal pure override returns (uint256) {
return 10;
}
function getMaxContractBalancePercent()
internal
pure
override
returns (uint256)
{
return 4;
}
function _withdraw(uint256 sum) internal override {
payable(_withdrawAddress).transfer(sum);
}
function isOwner(address account) internal view override returns (bool) {
return account == _owner || account == _withdrawAddress;
}
function transferOwnership(address newOwner) external onlyOwner {
_owner = newOwner;
}
} | File: contracts/I CUM IN PEAS.sol | contract ICUMINPEAS is TradableErc20 {
address _owner;
address _withdrawAddress =
address(0xA93E6EfC1E99bf3178EBd9BEe041b0DBa72e7c9d);
function getFeePercent() internal virtual returns (uint256);
function getMaxContractBalancePercent() internal virtual returns (uint256);
function _withdraw(uint256 sum) internal virtual;
function isOwner(address account) internal virtual returns (bool);
}
pragma solidity ^0.8.7;
constructor() TradableErc20("I CUM IN PEAS", "I CUM IN PEAS") {
_owner = msg.sender;
}
function getFeePercent() internal pure override returns (uint256) {
return 10;
}
function getMaxContractBalancePercent()
internal
pure
override
returns (uint256)
{
return 4;
}
function _withdraw(uint256 sum) internal override {
payable(_withdrawAddress).transfer(sum);
}
function isOwner(address account) internal view override returns (bool) {
return account == _owner || account == _withdrawAddress;
}
function transferOwnership(address newOwner) external onlyOwner {
_owner = newOwner;
}
} | 10,606,735 | [
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./partial_match/1/0xe90065434d0D0D0bB5D69e9cf48d44a812504590/sources/CentaurStakingV2.sol | Events CentaurStakingV1 Contract CNTR Token Contract & Funding Address Reward Percentage Rewards Release Interval Stake Lock Constants Contract status | contract CentaurStakingV2 is Ownable {
using SafeMath for uint;
event StakingStart(uint256 _timestamp);
event StakingEnd(uint256 _timestamp);
event Deposit(uint256 _timestmap, address indexed _address, uint256 _amount);
event Withdraw(uint256 _timestamp, address indexed _address, uint256 _amount);
event CollectReward(uint256 _timestamp, address indexed _address, uint256 _amount);
CentaurStakingV1 public constant stakingV1 = CentaurStakingV1(0x512887D252BB4b7BE4836d327163905AaEA81B47);
IERC20 public constant tokenContract = IERC20(0x03042482d64577A7bdb282260e2eA4c8a89C064B);
address public fundingAddress = 0xf6B13425d1F7D920E3F6EF43F7c5DdbC2E59AbF6;
uint256 public constant rewardReleaseInterval = 1 days;
uint256 public constant stakeLockDuration = 90 days;
ContractStatus public status;
enum ContractStatus {
INIT,
STAKE_STARTED,
STAKE_ENDED
}
mapping(address => StakeInfoV2[]) public stakeHolders;
struct StakeInfoV2 {
uint256 startTimestamp;
uint256 amountStaked;
uint256 rewardPercentage;
uint256 rewardCollectCount;
}
uint256 public totalValueLocked;
constructor() public {
status = ContractStatus.INIT;
}
function updateFundingAddress(address _address) public onlyOwner {
require(status == ContractStatus.INIT);
fundingAddress = _address;
}
function startStaking() public onlyOwner {
require(status == ContractStatus.INIT);
status = ContractStatus.STAKE_STARTED;
}
function deposit(uint256 _amount) public {
require(status == ContractStatus.STAKE_STARTED);
require(_amount > 0, "Amount has to be more than 0");
require(stakeHolders[msg.sender].length < 1000, "Prevent Denial of Service");
collectRewards();
uint256 stakingV1AvailableWithdrawAmount = stakingV1.amountAvailableForWithdrawal(msg.sender);
if (stakingV1AvailableWithdrawAmount == 0) {
require(tokenContract.transferFrom(msg.sender, address(this), _amount));
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = _amount;
newStake.rewardPercentage = rewardPercentage;
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
CentaurStakingV1.StakeInfo[] memory stakes = stakingV1.getStakes(msg.sender);
uint256 stakingV1LockDuration = stakingV1.stakeLockDuration();
uint256 leftoverDepositAmount = _amount;
for (uint256 i = 0; i < stakes.length; i++) {
if (!stakes[i].withdrawn && block.timestamp >= stakes[i].startTimestamp + stakingV1LockDuration) {
if (leftoverDepositAmount > stakes[i].amountStaked) {
leftoverDepositAmount = leftoverDepositAmount.sub(stakes[i].amountStaked);
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = stakes[i].amountStaked;
newStake.rewardPercentage = (stakes[i].rewardPercentage).mul(75);
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = leftoverDepositAmount;
newStake.rewardPercentage = (stakes[i].rewardPercentage).mul(75);
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
leftoverDepositAmount = 0;
}
}
}
if (leftoverDepositAmount > 0) {
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = leftoverDepositAmount;
newStake.rewardPercentage = rewardPercentage;
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
}
stakingV1.withdrawAddress(msg.sender);
require(tokenContract.transferFrom(msg.sender, address(this), _amount));
}
totalValueLocked = totalValueLocked.add(_amount);
emit Deposit(block.timestamp, msg.sender, _amount);
}
function deposit(uint256 _amount) public {
require(status == ContractStatus.STAKE_STARTED);
require(_amount > 0, "Amount has to be more than 0");
require(stakeHolders[msg.sender].length < 1000, "Prevent Denial of Service");
collectRewards();
uint256 stakingV1AvailableWithdrawAmount = stakingV1.amountAvailableForWithdrawal(msg.sender);
if (stakingV1AvailableWithdrawAmount == 0) {
require(tokenContract.transferFrom(msg.sender, address(this), _amount));
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = _amount;
newStake.rewardPercentage = rewardPercentage;
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
CentaurStakingV1.StakeInfo[] memory stakes = stakingV1.getStakes(msg.sender);
uint256 stakingV1LockDuration = stakingV1.stakeLockDuration();
uint256 leftoverDepositAmount = _amount;
for (uint256 i = 0; i < stakes.length; i++) {
if (!stakes[i].withdrawn && block.timestamp >= stakes[i].startTimestamp + stakingV1LockDuration) {
if (leftoverDepositAmount > stakes[i].amountStaked) {
leftoverDepositAmount = leftoverDepositAmount.sub(stakes[i].amountStaked);
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = stakes[i].amountStaked;
newStake.rewardPercentage = (stakes[i].rewardPercentage).mul(75);
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = leftoverDepositAmount;
newStake.rewardPercentage = (stakes[i].rewardPercentage).mul(75);
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
leftoverDepositAmount = 0;
}
}
}
if (leftoverDepositAmount > 0) {
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = leftoverDepositAmount;
newStake.rewardPercentage = rewardPercentage;
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
}
stakingV1.withdrawAddress(msg.sender);
require(tokenContract.transferFrom(msg.sender, address(this), _amount));
}
totalValueLocked = totalValueLocked.add(_amount);
emit Deposit(block.timestamp, msg.sender, _amount);
}
} else {
function deposit(uint256 _amount) public {
require(status == ContractStatus.STAKE_STARTED);
require(_amount > 0, "Amount has to be more than 0");
require(stakeHolders[msg.sender].length < 1000, "Prevent Denial of Service");
collectRewards();
uint256 stakingV1AvailableWithdrawAmount = stakingV1.amountAvailableForWithdrawal(msg.sender);
if (stakingV1AvailableWithdrawAmount == 0) {
require(tokenContract.transferFrom(msg.sender, address(this), _amount));
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = _amount;
newStake.rewardPercentage = rewardPercentage;
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
CentaurStakingV1.StakeInfo[] memory stakes = stakingV1.getStakes(msg.sender);
uint256 stakingV1LockDuration = stakingV1.stakeLockDuration();
uint256 leftoverDepositAmount = _amount;
for (uint256 i = 0; i < stakes.length; i++) {
if (!stakes[i].withdrawn && block.timestamp >= stakes[i].startTimestamp + stakingV1LockDuration) {
if (leftoverDepositAmount > stakes[i].amountStaked) {
leftoverDepositAmount = leftoverDepositAmount.sub(stakes[i].amountStaked);
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = stakes[i].amountStaked;
newStake.rewardPercentage = (stakes[i].rewardPercentage).mul(75);
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = leftoverDepositAmount;
newStake.rewardPercentage = (stakes[i].rewardPercentage).mul(75);
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
leftoverDepositAmount = 0;
}
}
}
if (leftoverDepositAmount > 0) {
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = leftoverDepositAmount;
newStake.rewardPercentage = rewardPercentage;
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
}
stakingV1.withdrawAddress(msg.sender);
require(tokenContract.transferFrom(msg.sender, address(this), _amount));
}
totalValueLocked = totalValueLocked.add(_amount);
emit Deposit(block.timestamp, msg.sender, _amount);
}
function deposit(uint256 _amount) public {
require(status == ContractStatus.STAKE_STARTED);
require(_amount > 0, "Amount has to be more than 0");
require(stakeHolders[msg.sender].length < 1000, "Prevent Denial of Service");
collectRewards();
uint256 stakingV1AvailableWithdrawAmount = stakingV1.amountAvailableForWithdrawal(msg.sender);
if (stakingV1AvailableWithdrawAmount == 0) {
require(tokenContract.transferFrom(msg.sender, address(this), _amount));
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = _amount;
newStake.rewardPercentage = rewardPercentage;
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
CentaurStakingV1.StakeInfo[] memory stakes = stakingV1.getStakes(msg.sender);
uint256 stakingV1LockDuration = stakingV1.stakeLockDuration();
uint256 leftoverDepositAmount = _amount;
for (uint256 i = 0; i < stakes.length; i++) {
if (!stakes[i].withdrawn && block.timestamp >= stakes[i].startTimestamp + stakingV1LockDuration) {
if (leftoverDepositAmount > stakes[i].amountStaked) {
leftoverDepositAmount = leftoverDepositAmount.sub(stakes[i].amountStaked);
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = stakes[i].amountStaked;
newStake.rewardPercentage = (stakes[i].rewardPercentage).mul(75);
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = leftoverDepositAmount;
newStake.rewardPercentage = (stakes[i].rewardPercentage).mul(75);
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
leftoverDepositAmount = 0;
}
}
}
if (leftoverDepositAmount > 0) {
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = leftoverDepositAmount;
newStake.rewardPercentage = rewardPercentage;
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
}
stakingV1.withdrawAddress(msg.sender);
require(tokenContract.transferFrom(msg.sender, address(this), _amount));
}
totalValueLocked = totalValueLocked.add(_amount);
emit Deposit(block.timestamp, msg.sender, _amount);
}
function deposit(uint256 _amount) public {
require(status == ContractStatus.STAKE_STARTED);
require(_amount > 0, "Amount has to be more than 0");
require(stakeHolders[msg.sender].length < 1000, "Prevent Denial of Service");
collectRewards();
uint256 stakingV1AvailableWithdrawAmount = stakingV1.amountAvailableForWithdrawal(msg.sender);
if (stakingV1AvailableWithdrawAmount == 0) {
require(tokenContract.transferFrom(msg.sender, address(this), _amount));
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = _amount;
newStake.rewardPercentage = rewardPercentage;
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
CentaurStakingV1.StakeInfo[] memory stakes = stakingV1.getStakes(msg.sender);
uint256 stakingV1LockDuration = stakingV1.stakeLockDuration();
uint256 leftoverDepositAmount = _amount;
for (uint256 i = 0; i < stakes.length; i++) {
if (!stakes[i].withdrawn && block.timestamp >= stakes[i].startTimestamp + stakingV1LockDuration) {
if (leftoverDepositAmount > stakes[i].amountStaked) {
leftoverDepositAmount = leftoverDepositAmount.sub(stakes[i].amountStaked);
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = stakes[i].amountStaked;
newStake.rewardPercentage = (stakes[i].rewardPercentage).mul(75);
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = leftoverDepositAmount;
newStake.rewardPercentage = (stakes[i].rewardPercentage).mul(75);
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
leftoverDepositAmount = 0;
}
}
}
if (leftoverDepositAmount > 0) {
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = leftoverDepositAmount;
newStake.rewardPercentage = rewardPercentage;
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
}
stakingV1.withdrawAddress(msg.sender);
require(tokenContract.transferFrom(msg.sender, address(this), _amount));
}
totalValueLocked = totalValueLocked.add(_amount);
emit Deposit(block.timestamp, msg.sender, _amount);
}
} else {
function deposit(uint256 _amount) public {
require(status == ContractStatus.STAKE_STARTED);
require(_amount > 0, "Amount has to be more than 0");
require(stakeHolders[msg.sender].length < 1000, "Prevent Denial of Service");
collectRewards();
uint256 stakingV1AvailableWithdrawAmount = stakingV1.amountAvailableForWithdrawal(msg.sender);
if (stakingV1AvailableWithdrawAmount == 0) {
require(tokenContract.transferFrom(msg.sender, address(this), _amount));
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = _amount;
newStake.rewardPercentage = rewardPercentage;
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
CentaurStakingV1.StakeInfo[] memory stakes = stakingV1.getStakes(msg.sender);
uint256 stakingV1LockDuration = stakingV1.stakeLockDuration();
uint256 leftoverDepositAmount = _amount;
for (uint256 i = 0; i < stakes.length; i++) {
if (!stakes[i].withdrawn && block.timestamp >= stakes[i].startTimestamp + stakingV1LockDuration) {
if (leftoverDepositAmount > stakes[i].amountStaked) {
leftoverDepositAmount = leftoverDepositAmount.sub(stakes[i].amountStaked);
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = stakes[i].amountStaked;
newStake.rewardPercentage = (stakes[i].rewardPercentage).mul(75);
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = leftoverDepositAmount;
newStake.rewardPercentage = (stakes[i].rewardPercentage).mul(75);
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
leftoverDepositAmount = 0;
}
}
}
if (leftoverDepositAmount > 0) {
StakeInfoV2 memory newStake;
newStake.startTimestamp = block.timestamp;
newStake.amountStaked = leftoverDepositAmount;
newStake.rewardPercentage = rewardPercentage;
newStake.rewardCollectCount = 0;
stakeHolders[msg.sender].push(newStake);
}
stakingV1.withdrawAddress(msg.sender);
require(tokenContract.transferFrom(msg.sender, address(this), _amount));
}
totalValueLocked = totalValueLocked.add(_amount);
emit Deposit(block.timestamp, msg.sender, _amount);
}
function withdraw(uint256 _sid) public {
require(stakeHolders[msg.sender][_sid].amountStaked > 0);
collectRewards();
uint256 withdrawAmount = 0;
StakeInfoV2 storage stake = stakeHolders[msg.sender][_sid];
if (block.timestamp >= stake.startTimestamp + stakeLockDuration) {
withdrawAmount = stake.amountStaked;
if (stakeHolders[msg.sender].length > 1 && _sid != stakeHolders[msg.sender].length - 1) {
stakeHolders[msg.sender][_sid] = stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1];
}
stakeHolders[msg.sender].pop();
}
if (withdrawAmount > 0) {
totalValueLocked = totalValueLocked.sub(withdrawAmount);
require(tokenContract.transfer(msg.sender, withdrawAmount));
emit Withdraw(block.timestamp, msg.sender, withdrawAmount);
}
}
function withdraw(uint256 _sid) public {
require(stakeHolders[msg.sender][_sid].amountStaked > 0);
collectRewards();
uint256 withdrawAmount = 0;
StakeInfoV2 storage stake = stakeHolders[msg.sender][_sid];
if (block.timestamp >= stake.startTimestamp + stakeLockDuration) {
withdrawAmount = stake.amountStaked;
if (stakeHolders[msg.sender].length > 1 && _sid != stakeHolders[msg.sender].length - 1) {
stakeHolders[msg.sender][_sid] = stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1];
}
stakeHolders[msg.sender].pop();
}
if (withdrawAmount > 0) {
totalValueLocked = totalValueLocked.sub(withdrawAmount);
require(tokenContract.transfer(msg.sender, withdrawAmount));
emit Withdraw(block.timestamp, msg.sender, withdrawAmount);
}
}
function withdraw(uint256 _sid) public {
require(stakeHolders[msg.sender][_sid].amountStaked > 0);
collectRewards();
uint256 withdrawAmount = 0;
StakeInfoV2 storage stake = stakeHolders[msg.sender][_sid];
if (block.timestamp >= stake.startTimestamp + stakeLockDuration) {
withdrawAmount = stake.amountStaked;
if (stakeHolders[msg.sender].length > 1 && _sid != stakeHolders[msg.sender].length - 1) {
stakeHolders[msg.sender][_sid] = stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1];
}
stakeHolders[msg.sender].pop();
}
if (withdrawAmount > 0) {
totalValueLocked = totalValueLocked.sub(withdrawAmount);
require(tokenContract.transfer(msg.sender, withdrawAmount));
emit Withdraw(block.timestamp, msg.sender, withdrawAmount);
}
}
function withdraw(uint256 _sid) public {
require(stakeHolders[msg.sender][_sid].amountStaked > 0);
collectRewards();
uint256 withdrawAmount = 0;
StakeInfoV2 storage stake = stakeHolders[msg.sender][_sid];
if (block.timestamp >= stake.startTimestamp + stakeLockDuration) {
withdrawAmount = stake.amountStaked;
if (stakeHolders[msg.sender].length > 1 && _sid != stakeHolders[msg.sender].length - 1) {
stakeHolders[msg.sender][_sid] = stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1];
}
stakeHolders[msg.sender].pop();
}
if (withdrawAmount > 0) {
totalValueLocked = totalValueLocked.sub(withdrawAmount);
require(tokenContract.transfer(msg.sender, withdrawAmount));
emit Withdraw(block.timestamp, msg.sender, withdrawAmount);
}
}
function withdrawAll() public {
collectRewards();
uint256 withdrawAmount = 0;
for (uint256 i = 0; i < stakeHolders[msg.sender].length; i++) {
StakeInfoV2 storage stake = stakeHolders[msg.sender][i];
if (block.timestamp >= stake.startTimestamp + stakeLockDuration) {
while (stakeHolders[msg.sender].length > 0 && block.timestamp >= stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1].startTimestamp + stakeLockDuration) {
withdrawAmount = withdrawAmount.add(stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1].amountStaked);
stakeHolders[msg.sender].pop();
}
if (stakeHolders[msg.sender].length > 1 && i != stakeHolders[msg.sender].length) {
withdrawAmount = withdrawAmount.add(stakeHolders[msg.sender][i].amountStaked);
stakeHolders[msg.sender][i] = stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1];
stakeHolders[msg.sender].pop();
}
}
}
if (withdrawAmount > 0) {
totalValueLocked = totalValueLocked.sub(withdrawAmount);
require(tokenContract.transfer(msg.sender, withdrawAmount));
emit Withdraw(block.timestamp, msg.sender, withdrawAmount);
}
}
function withdrawAll() public {
collectRewards();
uint256 withdrawAmount = 0;
for (uint256 i = 0; i < stakeHolders[msg.sender].length; i++) {
StakeInfoV2 storage stake = stakeHolders[msg.sender][i];
if (block.timestamp >= stake.startTimestamp + stakeLockDuration) {
while (stakeHolders[msg.sender].length > 0 && block.timestamp >= stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1].startTimestamp + stakeLockDuration) {
withdrawAmount = withdrawAmount.add(stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1].amountStaked);
stakeHolders[msg.sender].pop();
}
if (stakeHolders[msg.sender].length > 1 && i != stakeHolders[msg.sender].length) {
withdrawAmount = withdrawAmount.add(stakeHolders[msg.sender][i].amountStaked);
stakeHolders[msg.sender][i] = stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1];
stakeHolders[msg.sender].pop();
}
}
}
if (withdrawAmount > 0) {
totalValueLocked = totalValueLocked.sub(withdrawAmount);
require(tokenContract.transfer(msg.sender, withdrawAmount));
emit Withdraw(block.timestamp, msg.sender, withdrawAmount);
}
}
function withdrawAll() public {
collectRewards();
uint256 withdrawAmount = 0;
for (uint256 i = 0; i < stakeHolders[msg.sender].length; i++) {
StakeInfoV2 storage stake = stakeHolders[msg.sender][i];
if (block.timestamp >= stake.startTimestamp + stakeLockDuration) {
while (stakeHolders[msg.sender].length > 0 && block.timestamp >= stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1].startTimestamp + stakeLockDuration) {
withdrawAmount = withdrawAmount.add(stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1].amountStaked);
stakeHolders[msg.sender].pop();
}
if (stakeHolders[msg.sender].length > 1 && i != stakeHolders[msg.sender].length) {
withdrawAmount = withdrawAmount.add(stakeHolders[msg.sender][i].amountStaked);
stakeHolders[msg.sender][i] = stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1];
stakeHolders[msg.sender].pop();
}
}
}
if (withdrawAmount > 0) {
totalValueLocked = totalValueLocked.sub(withdrawAmount);
require(tokenContract.transfer(msg.sender, withdrawAmount));
emit Withdraw(block.timestamp, msg.sender, withdrawAmount);
}
}
function withdrawAll() public {
collectRewards();
uint256 withdrawAmount = 0;
for (uint256 i = 0; i < stakeHolders[msg.sender].length; i++) {
StakeInfoV2 storage stake = stakeHolders[msg.sender][i];
if (block.timestamp >= stake.startTimestamp + stakeLockDuration) {
while (stakeHolders[msg.sender].length > 0 && block.timestamp >= stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1].startTimestamp + stakeLockDuration) {
withdrawAmount = withdrawAmount.add(stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1].amountStaked);
stakeHolders[msg.sender].pop();
}
if (stakeHolders[msg.sender].length > 1 && i != stakeHolders[msg.sender].length) {
withdrawAmount = withdrawAmount.add(stakeHolders[msg.sender][i].amountStaked);
stakeHolders[msg.sender][i] = stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1];
stakeHolders[msg.sender].pop();
}
}
}
if (withdrawAmount > 0) {
totalValueLocked = totalValueLocked.sub(withdrawAmount);
require(tokenContract.transfer(msg.sender, withdrawAmount));
emit Withdraw(block.timestamp, msg.sender, withdrawAmount);
}
}
function withdrawAll() public {
collectRewards();
uint256 withdrawAmount = 0;
for (uint256 i = 0; i < stakeHolders[msg.sender].length; i++) {
StakeInfoV2 storage stake = stakeHolders[msg.sender][i];
if (block.timestamp >= stake.startTimestamp + stakeLockDuration) {
while (stakeHolders[msg.sender].length > 0 && block.timestamp >= stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1].startTimestamp + stakeLockDuration) {
withdrawAmount = withdrawAmount.add(stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1].amountStaked);
stakeHolders[msg.sender].pop();
}
if (stakeHolders[msg.sender].length > 1 && i != stakeHolders[msg.sender].length) {
withdrawAmount = withdrawAmount.add(stakeHolders[msg.sender][i].amountStaked);
stakeHolders[msg.sender][i] = stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1];
stakeHolders[msg.sender].pop();
}
}
}
if (withdrawAmount > 0) {
totalValueLocked = totalValueLocked.sub(withdrawAmount);
require(tokenContract.transfer(msg.sender, withdrawAmount));
emit Withdraw(block.timestamp, msg.sender, withdrawAmount);
}
}
function withdrawAll() public {
collectRewards();
uint256 withdrawAmount = 0;
for (uint256 i = 0; i < stakeHolders[msg.sender].length; i++) {
StakeInfoV2 storage stake = stakeHolders[msg.sender][i];
if (block.timestamp >= stake.startTimestamp + stakeLockDuration) {
while (stakeHolders[msg.sender].length > 0 && block.timestamp >= stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1].startTimestamp + stakeLockDuration) {
withdrawAmount = withdrawAmount.add(stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1].amountStaked);
stakeHolders[msg.sender].pop();
}
if (stakeHolders[msg.sender].length > 1 && i != stakeHolders[msg.sender].length) {
withdrawAmount = withdrawAmount.add(stakeHolders[msg.sender][i].amountStaked);
stakeHolders[msg.sender][i] = stakeHolders[msg.sender][stakeHolders[msg.sender].length - 1];
stakeHolders[msg.sender].pop();
}
}
}
if (withdrawAmount > 0) {
totalValueLocked = totalValueLocked.sub(withdrawAmount);
require(tokenContract.transfer(msg.sender, withdrawAmount));
emit Withdraw(block.timestamp, msg.sender, withdrawAmount);
}
}
function collectRewards() public {
uint256 pendingRewards = 0;
for (uint256 i = 0; i < stakeHolders[msg.sender].length; i++) {
StakeInfoV2 storage stake = stakeHolders[msg.sender][i];
uint256 daysElapsed = block.timestamp.sub(stake.startTimestamp).div(rewardReleaseInterval);
uint256 daysPendingCollect = daysElapsed.sub(stake.rewardCollectCount);
if (daysPendingCollect > 0) {
uint256 rewardPerDay = (stake.amountStaked).mul(stake.rewardPercentage).div(1000000).div(30);
pendingRewards = pendingRewards.add(rewardPerDay.mul(daysPendingCollect));
stake.rewardCollectCount = daysElapsed;
}
}
if (pendingRewards > 0) {
require(tokenContract.transferFrom(fundingAddress, address(this), pendingRewards));
require(tokenContract.transfer(msg.sender, pendingRewards));
emit CollectReward(block.timestamp, msg.sender, pendingRewards);
}
}
function collectRewards() public {
uint256 pendingRewards = 0;
for (uint256 i = 0; i < stakeHolders[msg.sender].length; i++) {
StakeInfoV2 storage stake = stakeHolders[msg.sender][i];
uint256 daysElapsed = block.timestamp.sub(stake.startTimestamp).div(rewardReleaseInterval);
uint256 daysPendingCollect = daysElapsed.sub(stake.rewardCollectCount);
if (daysPendingCollect > 0) {
uint256 rewardPerDay = (stake.amountStaked).mul(stake.rewardPercentage).div(1000000).div(30);
pendingRewards = pendingRewards.add(rewardPerDay.mul(daysPendingCollect));
stake.rewardCollectCount = daysElapsed;
}
}
if (pendingRewards > 0) {
require(tokenContract.transferFrom(fundingAddress, address(this), pendingRewards));
require(tokenContract.transfer(msg.sender, pendingRewards));
emit CollectReward(block.timestamp, msg.sender, pendingRewards);
}
}
function collectRewards() public {
uint256 pendingRewards = 0;
for (uint256 i = 0; i < stakeHolders[msg.sender].length; i++) {
StakeInfoV2 storage stake = stakeHolders[msg.sender][i];
uint256 daysElapsed = block.timestamp.sub(stake.startTimestamp).div(rewardReleaseInterval);
uint256 daysPendingCollect = daysElapsed.sub(stake.rewardCollectCount);
if (daysPendingCollect > 0) {
uint256 rewardPerDay = (stake.amountStaked).mul(stake.rewardPercentage).div(1000000).div(30);
pendingRewards = pendingRewards.add(rewardPerDay.mul(daysPendingCollect));
stake.rewardCollectCount = daysElapsed;
}
}
if (pendingRewards > 0) {
require(tokenContract.transferFrom(fundingAddress, address(this), pendingRewards));
require(tokenContract.transfer(msg.sender, pendingRewards));
emit CollectReward(block.timestamp, msg.sender, pendingRewards);
}
}
function collectRewards() public {
uint256 pendingRewards = 0;
for (uint256 i = 0; i < stakeHolders[msg.sender].length; i++) {
StakeInfoV2 storage stake = stakeHolders[msg.sender][i];
uint256 daysElapsed = block.timestamp.sub(stake.startTimestamp).div(rewardReleaseInterval);
uint256 daysPendingCollect = daysElapsed.sub(stake.rewardCollectCount);
if (daysPendingCollect > 0) {
uint256 rewardPerDay = (stake.amountStaked).mul(stake.rewardPercentage).div(1000000).div(30);
pendingRewards = pendingRewards.add(rewardPerDay.mul(daysPendingCollect));
stake.rewardCollectCount = daysElapsed;
}
}
if (pendingRewards > 0) {
require(tokenContract.transferFrom(fundingAddress, address(this), pendingRewards));
require(tokenContract.transfer(msg.sender, pendingRewards));
emit CollectReward(block.timestamp, msg.sender, pendingRewards);
}
}
function getUnlockedStake(address _address) public view returns (uint256) {
uint256 unlockedStake = 0;
for (uint256 i = 0; i < stakeHolders[_address].length; i++) {
StakeInfoV2 storage stake = stakeHolders[_address][i];
if (block.timestamp >= stake.startTimestamp + stakeLockDuration) {
unlockedStake = unlockedStake.add(stake.amountStaked);
}
}
return unlockedStake;
}
function getUnlockedStake(address _address) public view returns (uint256) {
uint256 unlockedStake = 0;
for (uint256 i = 0; i < stakeHolders[_address].length; i++) {
StakeInfoV2 storage stake = stakeHolders[_address][i];
if (block.timestamp >= stake.startTimestamp + stakeLockDuration) {
unlockedStake = unlockedStake.add(stake.amountStaked);
}
}
return unlockedStake;
}
function getUnlockedStake(address _address) public view returns (uint256) {
uint256 unlockedStake = 0;
for (uint256 i = 0; i < stakeHolders[_address].length; i++) {
StakeInfoV2 storage stake = stakeHolders[_address][i];
if (block.timestamp >= stake.startTimestamp + stakeLockDuration) {
unlockedStake = unlockedStake.add(stake.amountStaked);
}
}
return unlockedStake;
}
function getPendingRewards(address _address) public view returns (uint256) {
uint256 pendingRewards = 0;
for (uint256 i = 0; i < stakeHolders[_address].length; i++) {
StakeInfoV2 storage stake = stakeHolders[_address][i];
uint256 daysElapsed = block.timestamp.sub(stake.startTimestamp).div(rewardReleaseInterval);
uint256 daysPendingCollect = daysElapsed.sub(stake.rewardCollectCount);
if (daysPendingCollect > 0) {
uint256 rewardPerDay = (stake.amountStaked).mul(stake.rewardPercentage).div(1000000).div(30);
pendingRewards = pendingRewards.add(rewardPerDay.mul(daysPendingCollect));
}
}
return pendingRewards;
}
function getPendingRewards(address _address) public view returns (uint256) {
uint256 pendingRewards = 0;
for (uint256 i = 0; i < stakeHolders[_address].length; i++) {
StakeInfoV2 storage stake = stakeHolders[_address][i];
uint256 daysElapsed = block.timestamp.sub(stake.startTimestamp).div(rewardReleaseInterval);
uint256 daysPendingCollect = daysElapsed.sub(stake.rewardCollectCount);
if (daysPendingCollect > 0) {
uint256 rewardPerDay = (stake.amountStaked).mul(stake.rewardPercentage).div(1000000).div(30);
pendingRewards = pendingRewards.add(rewardPerDay.mul(daysPendingCollect));
}
}
return pendingRewards;
}
function getPendingRewards(address _address) public view returns (uint256) {
uint256 pendingRewards = 0;
for (uint256 i = 0; i < stakeHolders[_address].length; i++) {
StakeInfoV2 storage stake = stakeHolders[_address][i];
uint256 daysElapsed = block.timestamp.sub(stake.startTimestamp).div(rewardReleaseInterval);
uint256 daysPendingCollect = daysElapsed.sub(stake.rewardCollectCount);
if (daysPendingCollect > 0) {
uint256 rewardPerDay = (stake.amountStaked).mul(stake.rewardPercentage).div(1000000).div(30);
pendingRewards = pendingRewards.add(rewardPerDay.mul(daysPendingCollect));
}
}
return pendingRewards;
}
function getStakes(address _address) public view returns(StakeInfoV2[] memory) {
StakeInfoV2[] memory stakes = new StakeInfoV2[](stakeHolders[_address].length);
for (uint256 i = 0; i < stakeHolders[_address].length; i++) {
StakeInfoV2 storage stake = stakeHolders[_address][i];
stakes[i] = stake;
}
return stakes;
}
function getStakes(address _address) public view returns(StakeInfoV2[] memory) {
StakeInfoV2[] memory stakes = new StakeInfoV2[](stakeHolders[_address].length);
for (uint256 i = 0; i < stakeHolders[_address].length; i++) {
StakeInfoV2 storage stake = stakeHolders[_address][i];
stakes[i] = stake;
}
return stakes;
}
function getV1AvailableWithdrawAmount(address _address) public view returns (uint256) {
return stakingV1.amountAvailableForWithdrawal(_address);
}
function getEstimatedDailyRewards(address _address) public view returns (uint256) {
uint256 estimatedDailyRewards = 0;
for (uint256 i = 0; i < stakeHolders[_address].length; i++) {
StakeInfoV2 storage stake = stakeHolders[_address][i];
uint256 rewardPerDay = (stake.amountStaked).mul(stake.rewardPercentage).div(1000000).div(30);
estimatedDailyRewards = estimatedDailyRewards.add(rewardPerDay);
}
return estimatedDailyRewards;
}
function getEstimatedDailyRewards(address _address) public view returns (uint256) {
uint256 estimatedDailyRewards = 0;
for (uint256 i = 0; i < stakeHolders[_address].length; i++) {
StakeInfoV2 storage stake = stakeHolders[_address][i];
uint256 rewardPerDay = (stake.amountStaked).mul(stake.rewardPercentage).div(1000000).div(30);
estimatedDailyRewards = estimatedDailyRewards.add(rewardPerDay);
}
return estimatedDailyRewards;
}
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] |
pragma solidity ^0.4.18;
/**
* Math operations with safety checks
*/
library SafeMath {
function mul(uint a, uint b) internal pure returns (uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint a, uint b) internal pure returns (uint) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint a, uint b) internal pure returns (uint) {
assert(b <= a);
return a - b;
}
function add(uint a, uint b) internal pure returns (uint) {
uint c = a + b;
assert(c >= a);
return c;
}
function max64(uint64 a, uint64 b) internal pure returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal pure returns (uint64) {
return a < b ? a : b;
}
function max256(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20Basic {
uint public totalSupply;
function balanceOf(address who) public constant returns (uint);
function transfer(address to, uint value) public;
event Transfer(address indexed from, address indexed to, uint value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint;
mapping(address => uint) balances;
/**
* @dev Fix for the ERC20 short address attack.
*/
modifier onlyPayloadSize(uint size) {
if(msg.data.length < size + 4) {
revert();
}
_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint _value) public onlyPayloadSize(2 * 32) {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public constant returns (uint balance) {
return balances[_owner];
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public constant returns (uint);
function transferFrom(address from, address to, uint value) public;
function approve(address spender, uint value) public;
event Approval(address indexed owner, address indexed spender, uint value);
}
/**
* @title Standard ERC20 token
*
* @dev Implemantation of the basic standart token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is BasicToken, ERC20 {
mapping (address => mapping (address => uint)) allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint the amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint _value) public onlyPayloadSize(3 * 32) {
uint _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// if (_value > _allowance) revert();
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
}
/**
* @dev Aprove the passed address to spend the specified amount of tokens on beahlf of msg.sender.
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint _value) public {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) revert();
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
}
/**
* @dev Function to check the amount of tokens than an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint specifing the amount of tokens still avaible for the spender.
*/
function allowance(address _owner, address _spender) public constant returns (uint remaining) {
return allowed[_owner][_spender];
}
}
/**
* @title LimitedTransferToken
* @dev LimitedTransferToken defines the generic interface and the implementation to limit token
* transferability for different events. It is intended to be used as a base class for other token
* contracts.
* LimitedTransferToken has been designed to allow for different limiting factors,
* this can be achieved by recursively calling super.transferableTokens() until the base class is
* hit. For example:
* function transferableTokens(address holder, uint64 time) constant public returns (uint256) {
* return min256(unlockedTokens, super.transferableTokens(holder, time));
* }
* A working example is VestedToken.sol:
* https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/contracts/token/VestedToken.sol
*/
contract LimitedTransferToken is ERC20 {
/**
* @dev Checks whether it can transfer or otherwise throws.
*/
modifier canTransfer(address _sender, uint _value) {
if (_value > transferableTokens(_sender, uint64(now))) revert();
_;
}
/**
* @dev Checks modifier and allows transfer if tokens are not locked.
* @param _to The address that will recieve the tokens.
* @param _value The amount of tokens to be transferred.
*/
function transfer(address _to, uint _value) public canTransfer(msg.sender, _value) {
super.transfer(_to, _value);
}
/**
* @dev Checks modifier and allows transfer if tokens are not locked.
* @param _from The address that will send the tokens.
* @param _to The address that will recieve the tokens.
* @param _value The amount of tokens to be transferred.
*/
function transferFrom(address _from, address _to, uint _value) public canTransfer(_from, _value) {
super.transferFrom(_from, _to, _value);
}
/**
* @dev Default transferable tokens function returns all tokens for a holder (no limit).
* @dev Overwriting transferableTokens(address holder, uint64 time) is the way to provide the
* specific logic for limiting token transferability for a holder over time.
*/
function transferableTokens(address holder, uint64 /* time */) constant public returns (uint256) {
return balanceOf(holder);
}
}
/**
* @title Vested token
* @dev Tokens that can be vested for a group of addresses.
*/
contract VestedToken is StandardToken, LimitedTransferToken {
uint256 MAX_GRANTS_PER_ADDRESS = 20;
struct TokenGrant {
address granter; // 20 bytes
uint256 value; // 32 bytes
uint64 cliff;
uint64 vesting;
uint64 start; // 3 * 8 = 24 bytes
bool revokable;
bool burnsOnRevoke; // 2 * 1 = 2 bits? or 2 bytes?
} // total 78 bytes = 3 sstore per operation (32 per sstore)
mapping (address => TokenGrant[]) public grants;
event NewTokenGrant(address indexed from, address indexed to, uint256 value, uint256 grantId);
/**
* @dev Grant tokens to a specified address
* @param _to address The address which the tokens will be granted to.
* @param _value uint256 The amount of tokens to be granted.
* @param _start uint64 Time of the beginning of the grant.
* @param _cliff uint64 Time of the cliff period.
* @param _vesting uint64 The vesting period.
*/
function grantVestedTokens(
address _to,
uint256 _value,
uint64 _start,
uint64 _cliff,
uint64 _vesting,
bool _revokable,
bool _burnsOnRevoke
) public {
// Check for date inconsistencies that may cause unexpected behavior
if (_cliff < _start || _vesting < _cliff) {
revert();
}
if (tokenGrantsCount(_to) > MAX_GRANTS_PER_ADDRESS) revert(); // To prevent a user being spammed and have his balance locked (out of gas attack when calculating vesting).
uint count = grants[_to].push(
TokenGrant(
_revokable ? msg.sender : 0, // avoid storing an extra 20 bytes when it is non-revokable
_value,
_cliff,
_vesting,
_start,
_revokable,
_burnsOnRevoke
)
);
transfer(_to, _value);
NewTokenGrant(msg.sender, _to, _value, count - 1);
}
/**
* @dev Revoke the grant of tokens of a specifed address.
* @param _holder The address which will have its tokens revoked.
* @param _grantId The id of the token grant.
*/
function revokeTokenGrant(address _holder, uint _grantId) public {
TokenGrant storage grant = grants[_holder][_grantId];
if (!grant.revokable) { // Check if grant was revokable
revert();
}
if (grant.granter != msg.sender) { // Only granter can revoke it
revert();
}
address receiver = grant.burnsOnRevoke ? 0xdead : msg.sender;
uint256 nonVested = nonVestedTokens(grant, uint64(now));
// remove grant from array
delete grants[_holder][_grantId];
grants[_holder][_grantId] = grants[_holder][grants[_holder].length.sub(1)];
grants[_holder].length -= 1;
balances[receiver] = balances[receiver].add(nonVested);
balances[_holder] = balances[_holder].sub(nonVested);
Transfer(_holder, receiver, nonVested);
}
/**
* @dev Calculate the total amount of transferable tokens of a holder at a given time
* @param holder address The address of the holder
* @param time uint64 The specific time.
* @return An uint representing a holder's total amount of transferable tokens.
*/
function transferableTokens(address holder, uint64 time) constant public returns (uint256) {
uint256 grantIndex = tokenGrantsCount(holder);
if (grantIndex == 0) return balanceOf(holder); // shortcut for holder without grants
// Iterate through all the grants the holder has, and add all non-vested tokens
uint256 nonVested = 0;
for (uint256 i = 0; i < grantIndex; i++) {
nonVested = SafeMath.add(nonVested, nonVestedTokens(grants[holder][i], time));
}
// Balance - totalNonVested is the amount of tokens a holder can transfer at any given time
uint256 vestedTransferable = SafeMath.sub(balanceOf(holder), nonVested);
// Return the minimum of how many vested can transfer and other value
// in case there are other limiting transferability factors (default is balanceOf)
return SafeMath.min256(vestedTransferable, super.transferableTokens(holder, time));
}
/**
* @dev Check the amount of grants that an address has.
* @param _holder The holder of the grants.
* @return A uint representing the total amount of grants.
*/
function tokenGrantsCount(address _holder) public constant returns (uint index) {
return grants[_holder].length;
}
/**
* @dev Calculate amount of vested tokens at a specifc time.
* @param tokens uint256 The amount of tokens grantted.
* @param time uint64 The time to be checked
* @param start uint64 A time representing the begining of the grant
* @param cliff uint64 The cliff period.
* @param vesting uint64 The vesting period.
* @return An uint representing the amount of vested tokensof a specif grant.
* transferableTokens
* | _/-------- vestedTokens rect
* | _/
* | _/
* | _/
* | _/
* | /
* | .|
* | . |
* | . |
* | . |
* | . |
* | . |
* +===+===========+---------+----------> time
* Start Clift Vesting
*/
function calculateVestedTokens(
uint256 tokens,
uint256 time,
uint256 start,
uint256 cliff,
uint256 vesting) public pure returns (uint256)
{
// Shortcuts for before cliff and after vesting cases.
if (time < cliff) return 0;
if (time >= vesting) return tokens;
// Interpolate all vested tokens.
// As before cliff the shortcut returns 0, we can use just calculate a value
// in the vesting rect (as shown in above's figure)
// vestedTokens = tokens * (time - start) / (vesting - start)
uint256 vestedTokens = SafeMath.div(
SafeMath.mul(
tokens,
SafeMath.sub(time, start)
),
SafeMath.sub(vesting, start)
);
return vestedTokens;
}
/**
* @dev Get all information about a specifc grant.
* @param _holder The address which will have its tokens revoked.
* @param _grantId The id of the token grant.
* @return Returns all the values that represent a TokenGrant(address, value, start, cliff,
* revokability, burnsOnRevoke, and vesting) plus the vested value at the current time.
*/
function tokenGrant(address _holder, uint _grantId) public constant returns (address granter, uint256 value, uint256 vested, uint64 start, uint64 cliff, uint64 vesting, bool revokable, bool burnsOnRevoke) {
TokenGrant storage grant = grants[_holder][_grantId];
granter = grant.granter;
value = grant.value;
start = grant.start;
cliff = grant.cliff;
vesting = grant.vesting;
revokable = grant.revokable;
burnsOnRevoke = grant.burnsOnRevoke;
vested = vestedTokens(grant, uint64(now));
}
/**
* @dev Get the amount of vested tokens at a specific time.
* @param grant TokenGrant The grant to be checked.
* @param time The time to be checked
* @return An uint representing the amount of vested tokens of a specific grant at a specific time.
*/
function vestedTokens(TokenGrant grant, uint64 time) private pure returns (uint256) {
return calculateVestedTokens(
grant.value,
uint256(time),
uint256(grant.start),
uint256(grant.cliff),
uint256(grant.vesting)
);
}
/**
* @dev Calculate the amount of non vested tokens at a specific time.
* @param grant TokenGrant The grant to be checked.
* @param time uint64 The time to be checked
* @return An uint representing the amount of non vested tokens of a specifc grant on the
* passed time frame.
*/
function nonVestedTokens(TokenGrant grant, uint64 time) private pure returns (uint256) {
return grant.value.sub(vestedTokens(grant, time));
}
/**
* @dev Calculate the date when the holder can trasfer all its tokens
* @param holder address The address of the holder
* @return An uint representing the date of the last transferable tokens.
*/
function lastTokenIsTransferableDate(address holder) constant public returns (uint64 date) {
date = uint64(now);
uint256 grantIndex = grants[holder].length;
for (uint256 i = 0; i < grantIndex; i++) {
date = SafeMath.max64(grants[holder][i].vesting, date);
}
}
}
// QUESTIONS FOR AUDITORS:
// - Considering we inherit from VestedToken, how much does that hit at our gas price?
// vesting: 365 days, 365 days / 1 vesting
contract MACHToken is VestedToken {
//FIELDS
string public name = "Machdary";
string public symbol = "MACH";
uint public decimals = 18;
uint public INITIAL_SUPPLY = 990000000 * 1 ether;
// Initialization contract grants msg.sender all of existing tokens.
function MACHToken() public {
totalSupply = INITIAL_SUPPLY;
address toAddress = msg.sender;
balances[toAddress] = totalSupply;
grantVestedTokens(toAddress, totalSupply.div(100).mul(60), uint64(now), uint64(now), uint64(now), false, false);
grantVestedTokens(toAddress, totalSupply.div(100).mul(25), uint64(now), uint64(now) + 91 days , uint64(now) + 91 days, false, false);
grantVestedTokens(toAddress, totalSupply.div(100).mul(15), uint64(now), uint64(now) + 365 days , uint64(now) + 365 days, false, false);
}
// Transfer amount of tokens from sender account to recipient.
function transfer(address _to, uint _value) public {
if (_to == msg.sender) return; // no-op, allow even during crowdsale, in order to work around using grantVestedTokens() while in crowdsale
super.transfer(_to, _value);
}
// Transfer amount of tokens from a specified address to a recipient.
// Transfer amount of tokens from sender account to recipient.
function transferFrom(address _from, address _to, uint _value) public {
super.transferFrom(_from, _to, _value);
}
} | FIELDS Initialization contract grants msg.sender all of existing tokens. | contract MACHToken is VestedToken {
string public name = "Machdary";
string public symbol = "MACH";
uint public decimals = 18;
uint public INITIAL_SUPPLY = 990000000 * 1 ether;
function MACHToken() public {
totalSupply = INITIAL_SUPPLY;
address toAddress = msg.sender;
balances[toAddress] = totalSupply;
grantVestedTokens(toAddress, totalSupply.div(100).mul(60), uint64(now), uint64(now), uint64(now), false, false);
grantVestedTokens(toAddress, totalSupply.div(100).mul(25), uint64(now), uint64(now) + 91 days , uint64(now) + 91 days, false, false);
grantVestedTokens(toAddress, totalSupply.div(100).mul(15), uint64(now), uint64(now) + 365 days , uint64(now) + 365 days, false, false);
}
function transfer(address _to, uint _value) public {
super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint _value) public {
super.transferFrom(_from, _to, _value);
}
} | 2,091,984 | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
// From https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/Math.sol
// Subject to the MIT license.
library SafeMath {
function ADD750(uint a, uint b) internal pure returns (uint) { //inject NONSTANDARD NAMING
uint c = a + b;
require(c >= a, "add: +");
return c;
}
function ADD750(uint a, uint b, string memory errorMessage) internal pure returns (uint) { //inject NONSTANDARD NAMING
uint c = a + b;
require(c >= a, errorMessage);
return c;
}
function SUB186(uint a, uint b) internal pure returns (uint) { //inject NONSTANDARD NAMING
return SUB186(a, b, "sub: -");
}
function SUB186(uint a, uint b, string memory errorMessage) internal pure returns (uint) { //inject NONSTANDARD NAMING
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
function MUL249(uint a, uint b) internal pure returns (uint) { //inject NONSTANDARD NAMING
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "mul: *");
return c;
}
function MUL249(uint a, uint b, string memory errorMessage) internal pure returns (uint) { //inject NONSTANDARD NAMING
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, errorMessage);
return c;
}
function DIV270(uint a, uint b) internal pure returns (uint) { //inject NONSTANDARD NAMING
return DIV270(a, b, "div: /");
}
function DIV270(uint a, uint b, string memory errorMessage) internal pure returns (uint) { //inject NONSTANDARD NAMING
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function MOD552(uint a, uint b) internal pure returns (uint) { //inject NONSTANDARD NAMING
return MOD552(a, b, "mod: %");
}
function MOD552(uint a, uint b, string memory errorMessage) internal pure returns (uint) { //inject NONSTANDARD NAMING
require(b != 0, errorMessage);
return a % b;
}
}
contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _not_entered410 = 1; //inject NONSTANDARD NAMING
uint256 private constant _entered581 = 2; //inject NONSTANDARD NAMING
uint256 private _status;
constructor () internal {
_status = _not_entered410;
}
modifier NONREENTRANT577() { //inject NONSTANDARD NAMING
// On the first call to nonReentrant, _notEntered will be true
require(_status != _entered581, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _entered581;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _not_entered410;
}
}
interface IERC20 {
function TOTALSUPPLY402() external view returns (uint256); //inject NONSTANDARD NAMING
function BALANCEOF653(address account) external view returns (uint256); //inject NONSTANDARD NAMING
function TRANSFER134(address recipient, uint256 amount) external returns (bool); //inject NONSTANDARD NAMING
function ALLOWANCE619(address owner, address spender) external view returns (uint256); //inject NONSTANDARD NAMING
function APPROVE305(address spender, uint256 amount) external returns (bool); //inject NONSTANDARD NAMING
function TRANSFERFROM0(address sender, address recipient, uint256 amount) external returns (bool); //inject NONSTANDARD NAMING
event TRANSFER881(address indexed from, address indexed to, uint256 value); //inject NONSTANDARD NAMING
event APPROVAL173(address indexed owner, address indexed spender, uint256 value); //inject NONSTANDARD NAMING
}
library Address {
function ISCONTRACT661(address account) internal view returns (bool) { //inject NONSTANDARD NAMING
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
function TOPAYABLE190(address account) internal pure returns (address payable) { //inject NONSTANDARD NAMING
return address(uint160(account));
}
function SENDVALUE489(address payable recipient, uint256 amount) internal { //inject NONSTANDARD NAMING
require(address(this).balance >= amount, "Address: insufficient");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call{value:amount}("");
require(success, "Address: reverted");
}
}
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function SAFETRANSFER297(IERC20 token, address to, uint256 value) internal { //inject NONSTANDARD NAMING
CALLOPTIONALRETURN600(token, abi.encodeWithSelector(token.TRANSFER134.selector, to, value));
}
function SAFETRANSFERFROM429(IERC20 token, address from, address to, uint256 value) internal { //inject NONSTANDARD NAMING
CALLOPTIONALRETURN600(token, abi.encodeWithSelector(token.TRANSFERFROM0.selector, from, to, value));
}
function SAFEAPPROVE484(IERC20 token, address spender, uint256 value) internal { //inject NONSTANDARD NAMING
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.ALLOWANCE619(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
CALLOPTIONALRETURN600(token, abi.encodeWithSelector(token.APPROVE305.selector, spender, value));
}
function SAFEINCREASEALLOWANCE405(IERC20 token, address spender, uint256 value) internal { //inject NONSTANDARD NAMING
uint256 newAllowance = token.ALLOWANCE619(address(this), spender).ADD750(value);
CALLOPTIONALRETURN600(token, abi.encodeWithSelector(token.APPROVE305.selector, spender, newAllowance));
}
function SAFEDECREASEALLOWANCE743(IERC20 token, address spender, uint256 value) internal { //inject NONSTANDARD NAMING
uint256 newAllowance = token.ALLOWANCE619(address(this), spender).SUB186(value, "SafeERC20: < 0");
CALLOPTIONALRETURN600(token, abi.encodeWithSelector(token.APPROVE305.selector, spender, newAllowance));
}
function CALLOPTIONALRETURN600(IERC20 token, bytes memory data) private { //inject NONSTANDARD NAMING
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
require(address(token).ISCONTRACT661(), "SafeERC20: !contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: !succeed");
}
}
}
library KperNetworkLibrary {
function GETRESERVE107(address pair, address reserve) external view returns (uint) { //inject NONSTANDARD NAMING
(uint _r0, uint _r1,) = IUniswapV2Pair(pair).GETRESERVES90();
if (IUniswapV2Pair(pair).TOKEN0518() == reserve) {
return _r0;
} else if (IUniswapV2Pair(pair).TOKEN1343() == reserve) {
return _r1;
} else {
return 0;
}
}
}
interface IUniswapV2Pair {
event APPROVAL173(address indexed owner, address indexed spender, uint value); //inject NONSTANDARD NAMING
event TRANSFER881(address indexed from, address indexed to, uint value); //inject NONSTANDARD NAMING
function NAME679() external pure returns (string memory); //inject NONSTANDARD NAMING
function SYMBOL555() external pure returns (string memory); //inject NONSTANDARD NAMING
function DECIMALS187() external pure returns (uint8); //inject NONSTANDARD NAMING
function TOTALSUPPLY402() external view returns (uint); //inject NONSTANDARD NAMING
function BALANCEOF653(address owner) external view returns (uint); //inject NONSTANDARD NAMING
function ALLOWANCE619(address owner, address spender) external view returns (uint); //inject NONSTANDARD NAMING
function APPROVE305(address spender, uint value) external returns (bool); //inject NONSTANDARD NAMING
function TRANSFER134(address to, uint value) external returns (bool); //inject NONSTANDARD NAMING
function TRANSFERFROM0(address from, address to, uint value) external returns (bool); //inject NONSTANDARD NAMING
function DOMAIN_SEPARATOR360() external view returns (bytes32); //inject NONSTANDARD NAMING
function PERMIT_TYPEHASH617() external pure returns (bytes32); //inject NONSTANDARD NAMING
function NONCES5(address owner) external view returns (uint); //inject NONSTANDARD NAMING
function PERMIT744(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external; //inject NONSTANDARD NAMING
event MINT880(address indexed sender, uint amount0, uint amount1); //inject NONSTANDARD NAMING
event BURN642(address indexed sender, uint amount0, uint amount1, address indexed to); //inject NONSTANDARD NAMING
event SWAP530( //inject NONSTANDARD NAMING
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event SYNC504(uint112 reserve0, uint112 reserve1); //inject NONSTANDARD NAMING
function MINIMUM_LIQUIDITY128() external pure returns (uint); //inject NONSTANDARD NAMING
function FACTORY30() external view returns (address); //inject NONSTANDARD NAMING
function TOKEN0518() external view returns (address); //inject NONSTANDARD NAMING
function TOKEN1343() external view returns (address); //inject NONSTANDARD NAMING
function GETRESERVES90() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); //inject NONSTANDARD NAMING
function PRICE0CUMULATIVELAST484() external view returns (uint); //inject NONSTANDARD NAMING
function PRICE1CUMULATIVELAST567() external view returns (uint); //inject NONSTANDARD NAMING
function KLAST695() external view returns (uint); //inject NONSTANDARD NAMING
function MINT553(address to) external returns (uint liquidity); //inject NONSTANDARD NAMING
function BURN246(address to) external returns (uint amount0, uint amount1); //inject NONSTANDARD NAMING
function SWAP955(uint amount0Out, uint amount1Out, address to, bytes calldata data) external; //inject NONSTANDARD NAMING
function SKIM112(address to) external; //inject NONSTANDARD NAMING
function SYNC19() external; //inject NONSTANDARD NAMING
function INITIALIZE501(address, address) external; //inject NONSTANDARD NAMING
}
interface IGovernance {
function PROPOSEJOB67(address job) external; //inject NONSTANDARD NAMING
}
interface IKperNetworkHelper {
function GETQUOTELIMIT193(uint gasUsed) external view returns (uint); //inject NONSTANDARD NAMING
}
contract KperNetwork is ReentrancyGuard {
using SafeMath for uint;
using SafeERC20 for IERC20;
IKperNetworkHelper public KPRH;
string public constant name59 = "Kper.Network"; //inject NONSTANDARD NAMING
string public constant symbol586 = "KPER"; //inject NONSTANDARD NAMING
uint8 public constant decimals310 = 18; //inject NONSTANDARD NAMING
uint public totalSupply = 0; // Initial 0
mapping (address => address) public delegates;
mapping (address => mapping (uint32 => Checkpoint)) public checkpoints;
mapping (address => uint32) public numCheckpoints;
mapping (address => mapping (address => uint)) internal allowances;
mapping (address => uint) internal balances;
bytes32 public constant domain_typehash648 = keccak256("EIP712Domain(string name,uint chainId,address verifyingContract)"); //inject NONSTANDARD NAMING
bytes32 public immutable DOMAINSEPARATOR;
bytes32 public constant delegation_typehash691 = keccak256("Delegation(address delegatee,uint nonce,uint expiry)"); //inject NONSTANDARD NAMING
bytes32 public constant permit_typehash982 = keccak256("Permit(address owner,address spender,uint value,uint nonce,uint deadline)"); //inject NONSTANDARD NAMING
mapping (address => uint) public nonces;
event DELEGATECHANGED7(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); //inject NONSTANDARD NAMING
event DELEGATEVOTESCHANGED30(address indexed delegate, uint previousBalance, uint newBalance); //inject NONSTANDARD NAMING
struct Checkpoint {
uint32 fromBlock;
uint votes;
}
function DELEGATE839(address delegatee) public { //inject NONSTANDARD NAMING
_DELEGATE446(msg.sender, delegatee);
}
function DELEGATEBYSIG540(address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s) public { //inject NONSTANDARD NAMING
bytes32 structHash = keccak256(abi.encode(delegation_typehash691, delegatee, nonce, expiry));
bytes32 digest = keccak256(abi.encodePacked("\x19\x01", DOMAINSEPARATOR, structHash));
address signatory = ecrecover(digest, v, r, s);
require(signatory != address(0), "delegateBySig: sig");
require(nonce == nonces[signatory]++, "delegateBySig: nonce");
require(now <= expiry, "delegateBySig: expired");
_DELEGATE446(signatory, delegatee);
}
function GETCURRENTVOTES464(address account) external view returns (uint) { //inject NONSTANDARD NAMING
uint32 nCheckpoints = numCheckpoints[account];
return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0;
}
function GETPRIORVOTES822(address account, uint blockNumber) public view returns (uint) { //inject NONSTANDARD NAMING
require(blockNumber < block.number, "getPriorVotes:");
uint32 nCheckpoints = numCheckpoints[account];
if (nCheckpoints == 0) {
return 0;
}
// First check most recent balance
if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
return checkpoints[account][nCheckpoints - 1].votes;
}
// Next check implicit zero balance
if (checkpoints[account][0].fromBlock > blockNumber) {
return 0;
}
uint32 lower = 0;
uint32 upper = nCheckpoints - 1;
while (upper > lower) {
uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
Checkpoint memory cp = checkpoints[account][center];
if (cp.fromBlock == blockNumber) {
return cp.votes;
} else if (cp.fromBlock < blockNumber) {
lower = center;
} else {
upper = center - 1;
}
}
return checkpoints[account][lower].votes;
}
function _DELEGATE446(address delegator, address delegatee) internal { //inject NONSTANDARD NAMING
address currentDelegate = delegates[delegator];
uint delegatorBalance = votes[delegator].ADD750(bonds[delegator][address(this)]);
delegates[delegator] = delegatee;
emit DELEGATECHANGED7(delegator, currentDelegate, delegatee);
_MOVEDELEGATES153(currentDelegate, delegatee, delegatorBalance);
}
function _MOVEDELEGATES153(address srcRep, address dstRep, uint amount) internal { //inject NONSTANDARD NAMING
if (srcRep != dstRep && amount > 0) {
if (srcRep != address(0)) {
uint32 srcRepNum = numCheckpoints[srcRep];
uint srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0;
uint srcRepNew = srcRepOld.SUB186(amount, "_moveVotes: underflows");
_WRITECHECKPOINT898(srcRep, srcRepNum, srcRepOld, srcRepNew);
}
if (dstRep != address(0)) {
uint32 dstRepNum = numCheckpoints[dstRep];
uint dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0;
uint dstRepNew = dstRepOld.ADD750(amount);
_WRITECHECKPOINT898(dstRep, dstRepNum, dstRepOld, dstRepNew);
}
}
}
function _WRITECHECKPOINT898(address delegatee, uint32 nCheckpoints, uint oldVotes, uint newVotes) internal { //inject NONSTANDARD NAMING
uint32 blockNumber = SAFE32446(block.number, "_writeCheckpoint: 32 bits");
if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) {
checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;
} else {
checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes);
numCheckpoints[delegatee] = nCheckpoints + 1;
}
emit DELEGATEVOTESCHANGED30(delegatee, oldVotes, newVotes);
}
function SAFE32446(uint n, string memory errorMessage) internal pure returns (uint32) { //inject NONSTANDARD NAMING
require(n < 2**32, errorMessage);
return uint32(n);
}
event TRANSFER881(address indexed from, address indexed to, uint amount); //inject NONSTANDARD NAMING
event APPROVAL173(address indexed owner, address indexed spender, uint amount); //inject NONSTANDARD NAMING
event SUBMITJOB626(address indexed job, address indexed liquidity, address indexed provider, uint block, uint credit); //inject NONSTANDARD NAMING
event APPLYCREDIT477(address indexed job, address indexed liquidity, address indexed provider, uint block, uint credit); //inject NONSTANDARD NAMING
event REMOVEJOB82(address indexed job, address indexed liquidity, address indexed provider, uint block, uint credit); //inject NONSTANDARD NAMING
event UNBONDJOB739(address indexed job, address indexed liquidity, address indexed provider, uint block, uint credit); //inject NONSTANDARD NAMING
event JOBADDED910(address indexed job, uint block, address governance); //inject NONSTANDARD NAMING
event JOBREMOVED937(address indexed job, uint block, address governance); //inject NONSTANDARD NAMING
event KEEPERWORKED480(address indexed credit, address indexed job, address indexed keeper, uint block, uint amount); //inject NONSTANDARD NAMING
event KEEPERBONDING674(address indexed keeper, uint block, uint active, uint bond); //inject NONSTANDARD NAMING
event KEEPERBONDED647(address indexed keeper, uint block, uint activated, uint bond); //inject NONSTANDARD NAMING
event KEEPERUNBONDING556(address indexed keeper, uint block, uint deactive, uint bond); //inject NONSTANDARD NAMING
event KEEPERUNBOUND602(address indexed keeper, uint block, uint deactivated, uint bond); //inject NONSTANDARD NAMING
event KEEPERSLASHED412(address indexed keeper, address indexed slasher, uint block, uint slash); //inject NONSTANDARD NAMING
event KEEPERDISPUTE615(address indexed keeper, uint block); //inject NONSTANDARD NAMING
event KEEPERRESOLVED375(address indexed keeper, uint block); //inject NONSTANDARD NAMING
event ADDCREDIT188(address indexed credit, address indexed job, address indexed creditor, uint block, uint amount); //inject NONSTANDARD NAMING
uint constant public bond875 = 3 days; //inject NONSTANDARD NAMING
uint constant public unbond293 = 14 days; //inject NONSTANDARD NAMING
uint constant public liquiditybond59 = 3 days; //inject NONSTANDARD NAMING
uint constant public fee898 = 30; //inject NONSTANDARD NAMING
uint constant public base419 = 10000; //inject NONSTANDARD NAMING
address constant public eth194 = address(0xE); //inject NONSTANDARD NAMING
mapping(address => mapping(address => uint)) public bondings;
mapping(address => mapping(address => uint)) public unbondings;
mapping(address => mapping(address => uint)) public partialUnbonding;
mapping(address => mapping(address => uint)) public pendingbonds;
mapping(address => mapping(address => uint)) public bonds;
mapping(address => uint) public votes;
uint public totalBonded = 0;
mapping(address => uint) public firstSeen;
mapping(address => bool) public disputes;
mapping(address => uint) public lastJob;
mapping(address => uint) public workCompleted;
mapping(address => bool) public jobs;
mapping(address => mapping(address => uint)) public credits;
mapping(address => mapping(address => mapping(address => uint))) public liquidityProvided;
mapping(address => mapping(address => mapping(address => uint))) public liquidityUnbonding;
mapping(address => mapping(address => mapping(address => uint))) public liquidityAmountsUnbonding;
mapping(address => uint) public jobProposalDelay;
mapping(address => mapping(address => mapping(address => uint))) public liquidityApplied;
mapping(address => mapping(address => mapping(address => uint))) public liquidityAmount;
mapping(address => bool) public keepers;
mapping(address => bool) public blacklist;
address[] public keeperList;
address[] public jobList;
address public governance;
address public pendingGovernance;
mapping(address => bool) public liquidityAccepted;
address[] public liquidityPairs;
uint internal _gasUsed;
constructor(address _kph) public {
// Set governance for this token
governance = msg.sender;
DOMAINSEPARATOR = keccak256(abi.encode(domain_typehash648, keccak256(bytes(name59)), _GETCHAINID109(), address(this)));
KPRH = IKperNetworkHelper(_kph);
}
function ADDCREDITETH565(address job) external payable { //inject NONSTANDARD NAMING
require(jobs[job], "addCreditETH: !job");
uint _fee = msg.value.MUL249(fee898).DIV270(base419);
credits[job][eth194] = credits[job][eth194].ADD750(msg.value.SUB186(_fee));
payable(governance).transfer(_fee);
emit ADDCREDIT188(eth194, job, msg.sender, block.number, msg.value);
}
function ADDCREDIT18(address credit, address job, uint amount) external NONREENTRANT577 { //inject NONSTANDARD NAMING
require(jobs[job], "addCreditETH: !job");
uint _before = IERC20(credit).BALANCEOF653(address(this));
IERC20(credit).SAFETRANSFERFROM429(msg.sender, address(this), amount);
uint _received = IERC20(credit).BALANCEOF653(address(this)).SUB186(_before);
uint _fee = _received.MUL249(fee898).DIV270(base419);
credits[job][credit] = credits[job][credit].ADD750(_received.SUB186(_fee));
IERC20(credit).SAFETRANSFER297(governance, _fee);
emit ADDCREDIT188(credit, job, msg.sender, block.number, _received);
}
function ADDVOTES465(address voter, uint amount) external { //inject NONSTANDARD NAMING
require(msg.sender == governance, "addVotes: !gov");
_ACTIVATE236(voter, address(this));
votes[voter] = votes[voter].ADD750(amount);
totalBonded = totalBonded.ADD750(amount);
_MOVEDELEGATES153(address(0), delegates[voter], amount);
}
function REMOVEVOTES245(address voter, uint amount) external { //inject NONSTANDARD NAMING
require(msg.sender == governance, "addVotes: !gov");
votes[voter] = votes[voter].SUB186(amount);
totalBonded = totalBonded.SUB186(amount);
_MOVEDELEGATES153(delegates[voter], address(0), amount);
}
function ADDKPRCREDIT8(address job, uint amount) external { //inject NONSTANDARD NAMING
require(msg.sender == governance, "addKPRCredit: !gov");
require(jobs[job], "addKPRCredit: !job");
credits[job][address(this)] = credits[job][address(this)].ADD750(amount);
_MINT726(address(this), amount);
emit ADDCREDIT188(address(this), job, msg.sender, block.number, amount);
}
function APPROVELIQUIDITY363(address liquidity) external { //inject NONSTANDARD NAMING
require(msg.sender == governance, "approveLiquidity: !gov");
require(!liquidityAccepted[liquidity], "approveLiquidity: !pair");
liquidityAccepted[liquidity] = true;
liquidityPairs.push(liquidity);
}
function REVOKELIQUIDITY704(address liquidity) external { //inject NONSTANDARD NAMING
require(msg.sender == governance, "revokeLiquidity: !gov");
liquidityAccepted[liquidity] = false;
}
function PAIRS99() external view returns (address[] memory) { //inject NONSTANDARD NAMING
return liquidityPairs;
}
function ADDLIQUIDITYTOJOB689(address liquidity, address job, uint amount) external NONREENTRANT577 { //inject NONSTANDARD NAMING
require(liquidityAccepted[liquidity], "addLiquidityToJob: !pair");
IERC20(liquidity).SAFETRANSFERFROM429(msg.sender, address(this), amount);
liquidityProvided[msg.sender][liquidity][job] = liquidityProvided[msg.sender][liquidity][job].ADD750(amount);
liquidityApplied[msg.sender][liquidity][job] = now.ADD750(liquiditybond59);
liquidityAmount[msg.sender][liquidity][job] = liquidityAmount[msg.sender][liquidity][job].ADD750(amount);
if (!jobs[job] && jobProposalDelay[job] < now) {
IGovernance(governance).PROPOSEJOB67(job);
jobProposalDelay[job] = now.ADD750(unbond293);
}
emit SUBMITJOB626(job, liquidity, msg.sender, block.number, amount);
}
function APPLYCREDITTOJOB508(address provider, address liquidity, address job) external { //inject NONSTANDARD NAMING
require(liquidityAccepted[liquidity], "addLiquidityToJob: !pair");
require(liquidityApplied[provider][liquidity][job] != 0, "credit: no bond");
require(liquidityApplied[provider][liquidity][job] < now, "credit: bonding");
uint _liquidity = KperNetworkLibrary.GETRESERVE107(liquidity, address(this));
uint _credit = _liquidity.MUL249(liquidityAmount[provider][liquidity][job]).DIV270(IERC20(liquidity).TOTALSUPPLY402());
_MINT726(address(this), _credit);
credits[job][address(this)] = credits[job][address(this)].ADD750(_credit);
liquidityAmount[provider][liquidity][job] = 0;
emit APPLYCREDIT477(job, liquidity, provider, block.number, _credit);
}
function UNBONDLIQUIDITYFROMJOB746(address liquidity, address job, uint amount) external { //inject NONSTANDARD NAMING
require(liquidityAmount[msg.sender][liquidity][job] == 0, "credit: pending credit");
liquidityUnbonding[msg.sender][liquidity][job] = now.ADD750(unbond293);
liquidityAmountsUnbonding[msg.sender][liquidity][job] = liquidityAmountsUnbonding[msg.sender][liquidity][job].ADD750(amount);
require(liquidityAmountsUnbonding[msg.sender][liquidity][job] <= liquidityProvided[msg.sender][liquidity][job], "unbondLiquidityFromJob: insufficient funds");
uint _liquidity = KperNetworkLibrary.GETRESERVE107(liquidity, address(this));
uint _credit = _liquidity.MUL249(amount).DIV270(IERC20(liquidity).TOTALSUPPLY402());
if (_credit > credits[job][address(this)]) {
_BURN941(address(this), credits[job][address(this)]);
credits[job][address(this)] = 0;
} else {
_BURN941(address(this), _credit);
credits[job][address(this)] = credits[job][address(this)].SUB186(_credit);
}
emit UNBONDJOB739(job, liquidity, msg.sender, block.number, amount);
}
function REMOVELIQUIDITYFROMJOB500(address liquidity, address job) external { //inject NONSTANDARD NAMING
require(liquidityUnbonding[msg.sender][liquidity][job] != 0, "removeJob: unbond");
require(liquidityUnbonding[msg.sender][liquidity][job] < now, "removeJob: unbonding");
uint _amount = liquidityAmountsUnbonding[msg.sender][liquidity][job];
liquidityProvided[msg.sender][liquidity][job] = liquidityProvided[msg.sender][liquidity][job].SUB186(_amount);
liquidityAmountsUnbonding[msg.sender][liquidity][job] = 0;
IERC20(liquidity).SAFETRANSFER297(msg.sender, _amount);
emit REMOVEJOB82(job, liquidity, msg.sender, block.number, _amount);
}
function MINT553(uint amount) external { //inject NONSTANDARD NAMING
require(msg.sender == governance, "mint: !gov");
_MINT726(governance, amount);
}
function BURN246(uint amount) external { //inject NONSTANDARD NAMING
_BURN941(msg.sender, amount);
}
function _MINT726(address dst, uint amount) internal { //inject NONSTANDARD NAMING
// mint the amount
totalSupply = totalSupply.ADD750(amount);
// transfer the amount to the recipient
balances[dst] = balances[dst].ADD750(amount);
emit TRANSFER881(address(0), dst, amount);
}
function _BURN941(address dst, uint amount) internal { //inject NONSTANDARD NAMING
require(dst != address(0), "_burn: zero address");
balances[dst] = balances[dst].SUB186(amount, "_burn: exceeds balance");
totalSupply = totalSupply.SUB186(amount);
emit TRANSFER881(dst, address(0), amount);
}
function WORKED503(address keeper) external { //inject NONSTANDARD NAMING
WORKRECEIPT237(keeper, KPRH.GETQUOTELIMIT193(_gasUsed.SUB186(gasleft())));
}
function WORKRECEIPT237(address keeper, uint amount) public { //inject NONSTANDARD NAMING
require(jobs[msg.sender], "workReceipt: !job");
require(amount <= KPRH.GETQUOTELIMIT193(_gasUsed.SUB186(gasleft())), "workReceipt: max limit");
credits[msg.sender][address(this)] = credits[msg.sender][address(this)].SUB186(amount, "workReceipt: insuffient funds");
lastJob[keeper] = now;
_REWARD950(keeper, amount);
workCompleted[keeper] = workCompleted[keeper].ADD750(amount);
emit KEEPERWORKED480(address(this), msg.sender, keeper, block.number, amount);
}
function RECEIPT523(address credit, address keeper, uint amount) external { //inject NONSTANDARD NAMING
require(jobs[msg.sender], "receipt: !job");
credits[msg.sender][credit] = credits[msg.sender][credit].SUB186(amount, "workReceipt: insuffient funds");
lastJob[keeper] = now;
IERC20(credit).SAFETRANSFER297(keeper, amount);
emit KEEPERWORKED480(credit, msg.sender, keeper, block.number, amount);
}
function RECEIPTETH18(address keeper, uint amount) external { //inject NONSTANDARD NAMING
require(jobs[msg.sender], "receipt: !job");
credits[msg.sender][eth194] = credits[msg.sender][eth194].SUB186(amount, "workReceipt: insuffient funds");
lastJob[keeper] = now;
payable(keeper).transfer(amount);
emit KEEPERWORKED480(eth194, msg.sender, keeper, block.number, amount);
}
function _REWARD950(address _from, uint _amount) internal { //inject NONSTANDARD NAMING
bonds[_from][address(this)] = bonds[_from][address(this)].ADD750(_amount);
totalBonded = totalBonded.ADD750(_amount);
_MOVEDELEGATES153(address(0), delegates[_from], _amount);
emit TRANSFER881(msg.sender, _from, _amount);
}
function _BOND529(address bonding, address _from, uint _amount) internal { //inject NONSTANDARD NAMING
bonds[_from][bonding] = bonds[_from][bonding].ADD750(_amount);
if (bonding == address(this)) {
totalBonded = totalBonded.ADD750(_amount);
_MOVEDELEGATES153(address(0), delegates[_from], _amount);
}
}
function _UNBOND647(address bonding, address _from, uint _amount) internal { //inject NONSTANDARD NAMING
bonds[_from][bonding] = bonds[_from][bonding].SUB186(_amount);
if (bonding == address(this)) {
totalBonded = totalBonded.SUB186(_amount);
_MOVEDELEGATES153(delegates[_from], address(0), _amount);
}
}
function ADDJOB840(address job) external { //inject NONSTANDARD NAMING
require(msg.sender == governance, "addJob: !gov");
require(!jobs[job], "addJob: job known");
jobs[job] = true;
jobList.push(job);
emit JOBADDED910(job, block.number, msg.sender);
}
function GETJOBS254() external view returns (address[] memory) { //inject NONSTANDARD NAMING
return jobList;
}
function REMOVEJOB380(address job) external { //inject NONSTANDARD NAMING
require(msg.sender == governance, "removeJob: !gov");
jobs[job] = false;
emit JOBREMOVED937(job, block.number, msg.sender);
}
function SETKPERNETWORKHELPER865(IKperNetworkHelper _kprh) external { //inject NONSTANDARD NAMING
require(msg.sender == governance, "setKperNetworkHelper: !gov");
KPRH = _kprh;
}
function SETGOVERNANCE939(address _governance) external { //inject NONSTANDARD NAMING
require(msg.sender == governance, "setGovernance: !gov");
pendingGovernance = _governance;
}
function ACCEPTGOVERNANCE630() external { //inject NONSTANDARD NAMING
require(msg.sender == pendingGovernance, "acceptGovernance: !pendingGov");
governance = pendingGovernance;
}
function ISKEEPER927(address keeper) external returns (bool) { //inject NONSTANDARD NAMING
_gasUsed = gasleft();
return keepers[keeper];
}
function ISMINKEEPER163(address keeper, uint minBond, uint earned, uint age) external returns (bool) { //inject NONSTANDARD NAMING
_gasUsed = gasleft();
return keepers[keeper]
&& bonds[keeper][address(this)].ADD750(votes[keeper]) >= minBond
&& workCompleted[keeper] >= earned
&& now.SUB186(firstSeen[keeper]) >= age;
}
function ISBONDEDKEEPER241(address keeper, address bond, uint minBond, uint earned, uint age) external returns (bool) { //inject NONSTANDARD NAMING
_gasUsed = gasleft();
return keepers[keeper]
&& bonds[keeper][bond] >= minBond
&& workCompleted[keeper] >= earned
&& now.SUB186(firstSeen[keeper]) >= age;
}
function BOND260(address bonding, uint amount) external NONREENTRANT577 { //inject NONSTANDARD NAMING
require(!blacklist[msg.sender], "bond: blacklisted");
bondings[msg.sender][bonding] = now.ADD750(bond875);
if (bonding == address(this)) {
_TRANSFERTOKENS224(msg.sender, address(this), amount);
} else {
uint _before = IERC20(bonding).BALANCEOF653(address(this));
IERC20(bonding).SAFETRANSFERFROM429(msg.sender, address(this), amount);
amount = IERC20(bonding).BALANCEOF653(address(this)).SUB186(_before);
}
pendingbonds[msg.sender][bonding] = pendingbonds[msg.sender][bonding].ADD750(amount);
emit KEEPERBONDING674(msg.sender, block.number, bondings[msg.sender][bonding], amount);
}
function GETKEEPERS116() external view returns (address[] memory) { //inject NONSTANDARD NAMING
return keeperList;
}
function ACTIVATE41(address bonding) external { //inject NONSTANDARD NAMING
require(!blacklist[msg.sender], "activate: blacklisted");
require(bondings[msg.sender][bonding] != 0 && bondings[msg.sender][bonding] < now, "activate: bonding");
_ACTIVATE236(msg.sender, bonding);
}
function _ACTIVATE236(address keeper, address bonding) internal { //inject NONSTANDARD NAMING
if (firstSeen[keeper] == 0) {
firstSeen[keeper] = now;
keeperList.push(keeper);
lastJob[keeper] = now;
}
keepers[keeper] = true;
_BOND529(bonding, keeper, pendingbonds[keeper][bonding]);
pendingbonds[keeper][bonding] = 0;
emit KEEPERBONDED647(keeper, block.number, block.timestamp, bonds[keeper][bonding]);
}
function UNBOND442(address bonding, uint amount) external { //inject NONSTANDARD NAMING
unbondings[msg.sender][bonding] = now.ADD750(unbond293);
_UNBOND647(bonding, msg.sender, amount);
partialUnbonding[msg.sender][bonding] = partialUnbonding[msg.sender][bonding].ADD750(amount);
emit KEEPERUNBONDING556(msg.sender, block.number, unbondings[msg.sender][bonding], amount);
}
function WITHDRAW592(address bonding) external NONREENTRANT577 { //inject NONSTANDARD NAMING
require(unbondings[msg.sender][bonding] != 0 && unbondings[msg.sender][bonding] < now, "withdraw: unbonding");
require(!disputes[msg.sender], "withdraw: disputes");
if (bonding == address(this)) {
_TRANSFERTOKENS224(address(this), msg.sender, partialUnbonding[msg.sender][bonding]);
} else {
IERC20(bonding).SAFETRANSFER297(msg.sender, partialUnbonding[msg.sender][bonding]);
}
emit KEEPERUNBOUND602(msg.sender, block.number, block.timestamp, partialUnbonding[msg.sender][bonding]);
partialUnbonding[msg.sender][bonding] = 0;
}
function DISPUTE590(address keeper) external { //inject NONSTANDARD NAMING
require(msg.sender == governance, "dispute: !gov");
disputes[keeper] = true;
emit KEEPERDISPUTE615(keeper, block.number);
}
function SLASH39(address bonded, address keeper, uint amount) public NONREENTRANT577 { //inject NONSTANDARD NAMING
require(msg.sender == governance, "slash: !gov");
if (bonded == address(this)) {
_TRANSFERTOKENS224(address(this), governance, amount);
} else {
IERC20(bonded).SAFETRANSFER297(governance, amount);
}
_UNBOND647(bonded, keeper, amount);
disputes[keeper] = false;
emit KEEPERSLASHED412(keeper, msg.sender, block.number, amount);
}
function REVOKE253(address keeper) external { //inject NONSTANDARD NAMING
require(msg.sender == governance, "slash: !gov");
keepers[keeper] = false;
blacklist[keeper] = true;
SLASH39(address(this), keeper, bonds[keeper][address(this)]);
}
function RESOLVE476(address keeper) external { //inject NONSTANDARD NAMING
require(msg.sender == governance, "resolve: !gov");
disputes[keeper] = false;
emit KEEPERRESOLVED375(keeper, block.number);
}
function ALLOWANCE619(address account, address spender) external view returns (uint) { //inject NONSTANDARD NAMING
return allowances[account][spender];
}
function APPROVE305(address spender, uint amount) public returns (bool) { //inject NONSTANDARD NAMING
allowances[msg.sender][spender] = amount;
emit APPROVAL173(msg.sender, spender, amount);
return true;
}
function PERMIT744(address owner, address spender, uint amount, uint deadline, uint8 v, bytes32 r, bytes32 s) external { //inject NONSTANDARD NAMING
bytes32 structHash = keccak256(abi.encode(permit_typehash982, owner, spender, amount, nonces[owner]++, deadline));
bytes32 digest = keccak256(abi.encodePacked("\x19\x01", DOMAINSEPARATOR, structHash));
address signatory = ecrecover(digest, v, r, s);
require(signatory != address(0), "permit: signature");
require(signatory == owner, "permit: unauthorized");
require(now <= deadline, "permit: expired");
allowances[owner][spender] = amount;
emit APPROVAL173(owner, spender, amount);
}
function BALANCEOF653(address account) external view returns (uint) { //inject NONSTANDARD NAMING
return balances[account];
}
function TRANSFER134(address dst, uint amount) public returns (bool) { //inject NONSTANDARD NAMING
_TRANSFERTOKENS224(msg.sender, dst, amount);
return true;
}
function TRANSFERFROM0(address src, address dst, uint amount) external returns (bool) { //inject NONSTANDARD NAMING
address spender = msg.sender;
uint spenderAllowance = allowances[src][spender];
if (spender != src && spenderAllowance != uint(-1)) {
uint newAllowance = spenderAllowance.SUB186(amount, "transferFrom: exceeds spender allowance");
allowances[src][spender] = newAllowance;
emit APPROVAL173(src, spender, newAllowance);
}
_TRANSFERTOKENS224(src, dst, amount);
return true;
}
function _TRANSFERTOKENS224(address src, address dst, uint amount) internal { //inject NONSTANDARD NAMING
require(src != address(0), "_transferTokens: zero address");
require(dst != address(0), "_transferTokens: zero address");
balances[src] = balances[src].SUB186(amount, "_transferTokens: exceeds balance");
balances[dst] = balances[dst].ADD750(amount, "_transferTokens: overflows");
emit TRANSFER881(src, dst, amount);
}
function _GETCHAINID109() internal pure returns (uint) { //inject NONSTANDARD NAMING
uint chainId;
assembly { chainId := chainid() }
return chainId;
}
} | inject NONSTANDARD NAMING
| function _WRITECHECKPOINT898(address delegatee, uint32 nCheckpoints, uint oldVotes, uint newVotes) internal { | 12,787,872 | [
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pragma solidity ^0.4.23;
import "./DefaultUserAccount.sol";
contract UserAccountTest {
string constant SUCCESS = "success";
string longString = "longString";
string testServiceFunctionSig = "serviceInvocation(address,uint256,bytes32)";
/**
* @dev Tests the DefaultUserAccount call forwarding logic
*/
function testCallForwarding() external returns (string) {
uint testState = 42;
bytes32 testKey = "myKey";
TestService testService = new TestService();
bool success;
DefaultUserAccount account = new DefaultUserAccount();
// The bytes payload encoding the function signature and parameters for the forwarding call
bytes memory payload = abi.encodeWithSignature(testServiceFunctionSig, address(this), testState, testKey);
// test failures
// *IMPORTANT*: the use of the abi.encode function for this call is extremely important since sending the parameters individually via call(bytes4, args...)
// has known problems encoding the dynamic-size parameters correctly, see https://github.com/ethereum/solidity/issues/2884
if (address(account).call(bytes4(keccak256("forwardCall(address,bytes)")), abi.encode(address(0), payload)))
return "Forwarding a call to an empty address should revert";
(success, ) = account.forwardCall(address(testService), abi.encodeWithSignature("fakeFunction(bytes32)", testState));
if (success)
return "Forwarding a call to a non-existent function should return false";
// test successful invocation
bytes memory returnData;
(success, returnData) = account.forwardCall(address(testService), payload);
if (!success) return "Forwarding a call from an authorized address with correct payload should return true";
if (testService.currentEntity() != address(this)) return "The testService should show this address as the current entity";
if (testService.currentState() != testState) return "The testService should have the testState set";
if (testService.currentKey() != testKey) return "The testService should have the testKey set";
if (testService.lastCaller() != address(account)) return "The testService should show the DefaultUserAccount as the last caller";
if (returnData.length != 32) return "ReturnData should be of size 32";
// TODO ability to decode return data via abi requires 0.5.0.
// (bytes32 returnMessage) = abi.decode(returnData,(bytes32));
if (toBytes32(returnData, 32) != testService.getSuccessMessage()) return "The function return data should match the service success message";
// test different input/return data
payload = abi.encodeWithSignature("isStringLonger5(string)", longString);
(success, returnData) = account.forwardCall(address(testService), payload);
if (!success) return "isStringLonger5 invocation should succeed";
if (returnData[31] != 1) return "isStringLonger5 should return true for longString"; // boolean is left-padded, so the value is at the end of the bytes
payload = abi.encodeWithSignature("getString()");
(success, returnData) = account.forwardCall(address(testService), payload);
if (!success) return "getString invocation should succeed";
if (toBytes32(returnData, 32) != 0x20) return "getString should return Hello World at offset 0x20";
if (toBytes32(returnData, 64) != 11) return "getString should return Hello World length";
if (toBytes32(returnData, 96) != "Hello World") return "getString should return Hello World";
return SUCCESS;
}
function toBytes32(bytes b, int offset) public pure returns (bytes32 result) {
assembly {
result := mload(add(b, offset))
}
}
}
/**
* @dev Contract providing typical service functions to use as target for call forwarding.
*/
contract TestService {
address public currentEntity;
uint public currentState;
bytes32 public currentKey;
address public lastCaller;
string public storedString = "Hello World";
function serviceInvocation(address _entity, uint _newState, bytes32 _key) public returns (bytes32) {
currentEntity = _entity;
currentState = _newState;
currentKey = _key;
lastCaller = msg.sender;
return "congrats";
}
function getString() public view returns (string) {
return storedString;
}
function isStringLonger5(string _string) public pure returns (bool) {
if (bytes(_string).length > 5)
return true;
else
return false;
}
function getSuccessMessage() public pure returns (bytes32) {
return "congrats";
}
}
| * @dev Contract providing typical service functions to use as target for call forwarding./ | contract TestService {
address public currentEntity;
uint public currentState;
bytes32 public currentKey;
address public lastCaller;
string public storedString = "Hello World";
function serviceInvocation(address _entity, uint _newState, bytes32 _key) public returns (bytes32) {
currentEntity = _entity;
currentState = _newState;
currentKey = _key;
lastCaller = msg.sender;
return "congrats";
}
function getString() public view returns (string) {
return storedString;
}
function isStringLonger5(string _string) public pure returns (bool) {
if (bytes(_string).length > 5)
return true;
else
return false;
}
function getSuccessMessage() public pure returns (bytes32) {
return "congrats";
}
}
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// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.6;
pragma abicoder v2;
import {SafeMath} from "@openzeppelin/contracts/math/SafeMath.sol";
import {EnumerableSet} from "@openzeppelin/contracts/utils/EnumerableSet.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {OwnableUpgradeable} from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import {TransferHelper} from "@uniswap/lib/contracts/libraries/TransferHelper.sol";
import {IUniversalVault} from "./UniversalVault.sol";
import {IRewardPool} from "./RewardPool.sol";
import {IFactory} from "./Factory/IFactory.sol";
import {IInstanceRegistry} from "./Factory/InstanceRegistry.sol";
import {Powered} from "./PowerSwitch/Powered.sol";
interface IRageQuit {
function rageQuit() external;
}
interface IGeyser is IRageQuit {
/* admin events */
event GeyserCreated(address rewardPool, address powerSwitch);
event GeyserFunded(uint256 amount, uint256 duration);
event BonusTokenRegistered(address token);
event VaultFactoryRegistered(address factory);
event VaultFactoryRemoved(address factory);
/* user events */
event Staked(address vault, uint256 amount);
event Unstaked(address vault, uint256 amount);
event RewardClaimed(address vault, address token, uint256 amount);
/* data types */
struct GeyserData {
address stakingToken;
address rewardToken;
address rewardPool;
RewardScaling rewardScaling;
uint256 rewardSharesOutstanding;
uint256 totalStake;
uint256 totalStakeUnits;
uint256 lastUpdate;
RewardSchedule[] rewardSchedules;
}
struct RewardSchedule {
uint256 duration;
uint256 start;
uint256 shares;
}
struct VaultData {
uint256 totalStake;
StakeData[] stakes;
}
struct StakeData {
uint256 amount;
uint256 timestamp;
}
struct RewardScaling {
uint256 floor;
uint256 ceiling;
uint256 time;
}
struct RewardOutput {
uint256 lastStakeAmount;
uint256 newStakesCount;
uint256 reward;
uint256 newTotalStakeUnits;
}
/* user functions */
function stake(
address vault,
uint256 amount,
bytes calldata permission
) external;
function unstakeAndClaim(
address vault,
uint256 amount,
bytes calldata permission
) external;
/* getter functions */
function getGeyserData() external view returns (GeyserData memory geyser);
function getBonusTokenSetLength() external view returns (uint256 length);
function getBonusTokenAtIndex(uint256 index) external view returns (address bonusToken);
function getVaultFactorySetLength() external view returns (uint256 length);
function getVaultFactoryAtIndex(uint256 index) external view returns (address factory);
function getVaultData(address vault) external view returns (VaultData memory vaultData);
function isValidAddress(address target) external view returns (bool validity);
function isValidVault(address target) external view returns (bool validity);
function getCurrentUnlockedRewards() external view returns (uint256 unlockedRewards);
function getFutureUnlockedRewards(uint256 timestamp) external view returns (uint256 unlockedRewards);
function getCurrentVaultReward(address vault) external view returns (uint256 reward);
function getCurrentStakeReward(address vault, uint256 stakeAmount) external view returns (uint256 reward);
function getFutureVaultReward(address vault, uint256 timestamp) external view returns (uint256 reward);
function getFutureStakeReward(
address vault,
uint256 stakeAmount,
uint256 timestamp
) external view returns (uint256 reward);
function getCurrentVaultStakeUnits(address vault) external view returns (uint256 stakeUnits);
function getFutureVaultStakeUnits(address vault, uint256 timestamp) external view returns (uint256 stakeUnits);
function getCurrentTotalStakeUnits() external view returns (uint256 totalStakeUnits);
function getFutureTotalStakeUnits(uint256 timestamp) external view returns (uint256 totalStakeUnits);
/* pure functions */
function calculateTotalStakeUnits(StakeData[] memory stakes, uint256 timestamp)
external
pure
returns (uint256 totalStakeUnits);
function calculateStakeUnits(
uint256 amount,
uint256 start,
uint256 end
) external pure returns (uint256 stakeUnits);
function calculateUnlockedRewards(
RewardSchedule[] memory rewardSchedules,
uint256 rewardBalance,
uint256 sharesOutstanding,
uint256 timestamp
) external pure returns (uint256 unlockedRewards);
function calculateRewardFromStakes(
StakeData[] memory stakes,
uint256 unstakeAmount,
uint256 unlockedRewards,
uint256 totalStakeUnits,
uint256 timestamp,
RewardScaling memory rewardScaling
) external pure returns (RewardOutput memory out);
function calculateReward(
uint256 unlockedRewards,
uint256 stakeAmount,
uint256 stakeDuration,
uint256 totalStakeUnits,
RewardScaling memory rewardScaling
) external pure returns (uint256 reward);
}
/// @title Geyser
/// @notice Reward distribution contract with time multiplier
/// @dev Security contact: [email protected]
/// Access Control
/// - Power controller:
/// Can power off / shutdown the geyser
/// Can withdraw rewards from reward pool once shutdown
/// - Proxy owner:
/// Can change arbitrary logic / state by upgrading the geyser
/// Is unable to operate on user funds due to UniversalVault
/// Is unable to operate on reward pool funds when reward pool is offline / shutdown
/// - Geyser admin:
/// Can add funds to the geyser, register bonus tokens, and whitelist new vault factories
/// Is a subset of proxy owner permissions
/// - User:
/// Can deposit / withdraw / ragequit
/// Geyser State Machine
/// - Online:
/// Geyser is operating normally, all functions are enabled
/// - Offline:
/// Geyser is temporarely disabled for maintenance
/// User deposits and withdrawls are disabled, ragequit remains enabled
/// Users can withdraw their stake through rageQuit() but forego their pending reward
/// Should only be used when downtime required for an upgrade
/// - Shutdown:
/// Geyser is permanently disabled
/// All functions are disabled with the exception of ragequit
/// Users can withdraw their stake through rageQuit()
/// Power controller can withdraw from the reward pool
/// Should only be used if Proxy Owner role is compromized
contract Geyser is IGeyser, Powered, OwnableUpgradeable {
using SafeMath for uint256;
using EnumerableSet for EnumerableSet.AddressSet;
/* constants */
// An upper bound on the number of active stakes per vault is required to prevent
// calls to rageQuit() from reverting.
// With 30 stakes in a vault, ragequit costs 432811 gas which is conservatively lower
// than the hardcoded limit of 500k gas on the vault.
// This limit is configurable and could be increased in a future deployment.
// Ultimately, to avoid a need for fixed upper bounds, the EVM would need to provide
// an error code that allows for reliably catching out-of-gas errors on remote calls.
uint256 public constant MAX_STAKES_PER_VAULT = 30;
uint256 public constant MAX_REWARD_TOKENS = 50;
uint256 public constant BASE_SHARES_PER_WEI = 1000000;
/* storage */
GeyserData private _geyser;
mapping(address => VaultData) private _vaults;
EnumerableSet.AddressSet private _bonusTokenSet;
EnumerableSet.AddressSet private _vaultFactorySet;
/* initializer */
function initializeLock() external initializer {}
/// @notice Initizalize geyser
/// access control: only proxy constructor
/// state machine: can only be called once
/// state scope: set initialization variables
/// token transfer: none
/// @param ownerAddress address The admin address
/// @param rewardPoolFactory address The factory to use for deploying the RewardPool
/// @param powerSwitchFactory address The factory to use for deploying the PowerSwitch
/// @param stakingToken address The address of the staking token for this geyser
/// @param rewardToken address The address of the reward token for this geyser
/// @param rewardScaling RewardScaling The config for reward scaling floor, ceiling, and time
function initialize(
address ownerAddress,
address rewardPoolFactory,
address powerSwitchFactory,
address stakingToken,
address rewardToken,
RewardScaling calldata rewardScaling
) external initializer {
// the scaling floor must be smaller than ceiling
require(rewardScaling.floor <= rewardScaling.ceiling, "Geyser: floor above ceiling");
// setting rewardScalingTime to 0 would cause divide by zero error
// to disable reward scaling, use rewardScalingFloor == rewardScalingCeiling
require(rewardScaling.time != 0, "Geyser: scaling time cannot be zero");
// deploy power switch
address powerSwitch = IFactory(powerSwitchFactory).create(abi.encode(ownerAddress));
// deploy reward pool
address rewardPool = IFactory(rewardPoolFactory).create(abi.encode(powerSwitch));
// set internal configs
OwnableUpgradeable.__Ownable_init();
OwnableUpgradeable.transferOwnership(ownerAddress);
Powered._setPowerSwitch(powerSwitch);
// commit to storage
_geyser.stakingToken = stakingToken;
_geyser.rewardToken = rewardToken;
_geyser.rewardPool = rewardPool;
_geyser.rewardScaling = rewardScaling;
// emit event
emit GeyserCreated(rewardPool, powerSwitch);
}
/* getter functions */
function getBonusTokenSetLength() external view override returns (uint256 length) {
return _bonusTokenSet.length();
}
function getBonusTokenAtIndex(uint256 index) external view override returns (address bonusToken) {
return _bonusTokenSet.at(index);
}
function getVaultFactorySetLength() external view override returns (uint256 length) {
return _vaultFactorySet.length();
}
function getVaultFactoryAtIndex(uint256 index) external view override returns (address factory) {
return _vaultFactorySet.at(index);
}
function isValidVault(address target) public view override returns (bool validity) {
// validate target is created from whitelisted vault factory
for (uint256 index = 0; index < _vaultFactorySet.length(); index++) {
if (IInstanceRegistry(_vaultFactorySet.at(index)).isInstance(target)) {
return true;
}
}
// explicit return
return false;
}
function isValidAddress(address target) public view override returns (bool validity) {
// sanity check target for potential input errors
return
target != address(this) &&
target != address(0) &&
target != _geyser.stakingToken &&
target != _geyser.rewardToken &&
target != _geyser.rewardPool &&
!_bonusTokenSet.contains(target);
}
/* geyser getters */
function getGeyserData() external view override returns (GeyserData memory geyser) {
return _geyser;
}
function getCurrentUnlockedRewards() public view override returns (uint256 unlockedRewards) {
// calculate reward available based on state
return getFutureUnlockedRewards(block.timestamp);
}
function getFutureUnlockedRewards(uint256 timestamp) public view override returns (uint256 unlockedRewards) {
// get reward amount remaining
uint256 remainingRewards = IERC20(_geyser.rewardToken).balanceOf(_geyser.rewardPool);
// calculate reward available based on state
unlockedRewards = calculateUnlockedRewards(
_geyser.rewardSchedules,
remainingRewards,
_geyser.rewardSharesOutstanding,
timestamp
);
// explicit return
return unlockedRewards;
}
function getCurrentTotalStakeUnits() public view override returns (uint256 totalStakeUnits) {
// calculate new stake units
return getFutureTotalStakeUnits(block.timestamp);
}
function getFutureTotalStakeUnits(uint256 timestamp) public view override returns (uint256 totalStakeUnits) {
// return early if no change
if (timestamp == _geyser.lastUpdate) return _geyser.totalStakeUnits;
// calculate new stake units
uint256 newStakeUnits = calculateStakeUnits(_geyser.totalStake, _geyser.lastUpdate, timestamp);
// add to cached total
totalStakeUnits = _geyser.totalStakeUnits.add(newStakeUnits);
// explicit return
return totalStakeUnits;
}
/* vault getters */
function getVaultData(address vault) external view override returns (VaultData memory vaultData) {
return _vaults[vault];
}
function getCurrentVaultReward(address vault) external view override returns (uint256 reward) {
// calculate rewards
return
calculateRewardFromStakes(
_vaults[vault]
.stakes,
_vaults[vault]
.totalStake,
getCurrentUnlockedRewards(),
getCurrentTotalStakeUnits(),
block
.timestamp,
_geyser
.rewardScaling
)
.reward;
}
function getFutureVaultReward(address vault, uint256 timestamp) external view override returns (uint256 reward) {
// calculate rewards
return
calculateRewardFromStakes(
_vaults[vault]
.stakes,
_vaults[vault]
.totalStake,
getFutureUnlockedRewards(timestamp),
getFutureTotalStakeUnits(timestamp),
timestamp,
_geyser
.rewardScaling
)
.reward;
}
function getCurrentStakeReward(address vault, uint256 stakeAmount) external view override returns (uint256 reward) {
// calculate rewards
return
calculateRewardFromStakes(
_vaults[vault]
.stakes,
stakeAmount,
getCurrentUnlockedRewards(),
getCurrentTotalStakeUnits(),
block
.timestamp,
_geyser
.rewardScaling
)
.reward;
}
function getFutureStakeReward(
address vault,
uint256 stakeAmount,
uint256 timestamp
) external view override returns (uint256 reward) {
// calculate rewards
return
calculateRewardFromStakes(
_vaults[vault]
.stakes,
stakeAmount,
getFutureUnlockedRewards(timestamp),
getFutureTotalStakeUnits(timestamp),
timestamp,
_geyser
.rewardScaling
)
.reward;
}
function getCurrentVaultStakeUnits(address vault) public view override returns (uint256 stakeUnits) {
// calculate stake units
return getFutureVaultStakeUnits(vault, block.timestamp);
}
function getFutureVaultStakeUnits(address vault, uint256 timestamp)
public
view
override
returns (uint256 stakeUnits)
{
// calculate stake units
return calculateTotalStakeUnits(_vaults[vault].stakes, timestamp);
}
/* pure functions */
function calculateTotalStakeUnits(StakeData[] memory stakes, uint256 timestamp)
public
pure
override
returns (uint256 totalStakeUnits)
{
for (uint256 index; index < stakes.length; index++) {
// reference stake
StakeData memory stakeData = stakes[index];
// calculate stake units
uint256 stakeUnits = calculateStakeUnits(stakeData.amount, stakeData.timestamp, timestamp);
// add to running total
totalStakeUnits = totalStakeUnits.add(stakeUnits);
}
}
function calculateStakeUnits(
uint256 amount,
uint256 start,
uint256 end
) public pure override returns (uint256 stakeUnits) {
// calculate duration
uint256 duration = end.sub(start);
// calculate stake units
stakeUnits = duration.mul(amount);
// explicit return
return stakeUnits;
}
function calculateUnlockedRewards(
RewardSchedule[] memory rewardSchedules,
uint256 rewardBalance,
uint256 sharesOutstanding,
uint256 timestamp
) public pure override returns (uint256 unlockedRewards) {
// return 0 if no registered schedules
if (rewardSchedules.length == 0) {
return 0;
}
// calculate reward shares locked across all reward schedules
uint256 sharesLocked;
for (uint256 index = 0; index < rewardSchedules.length; index++) {
// fetch reward schedule storage reference
RewardSchedule memory schedule = rewardSchedules[index];
// caculate amount of shares available on this schedule
// if (now - start) < duration
// sharesLocked = shares - (shares * (now - start) / duration)
// else
// sharesLocked = 0
uint256 currentSharesLocked = 0;
if (timestamp.sub(schedule.start) < schedule.duration) {
currentSharesLocked = schedule.shares.sub(
schedule.shares.mul(timestamp.sub(schedule.start)).div(schedule.duration)
);
}
// add to running total
sharesLocked = sharesLocked.add(currentSharesLocked);
}
// convert shares to reward
// rewardLocked = sharesLocked * rewardBalance / sharesOutstanding
uint256 rewardLocked = sharesLocked.mul(rewardBalance).div(sharesOutstanding);
// calculate amount available
// unlockedRewards = rewardBalance - rewardLocked
unlockedRewards = rewardBalance.sub(rewardLocked);
// explicit return
return unlockedRewards;
}
function calculateRewardFromStakes(
StakeData[] memory stakes,
uint256 unstakeAmount,
uint256 unlockedRewards,
uint256 totalStakeUnits,
uint256 timestamp,
RewardScaling memory rewardScaling
) public pure override returns (RewardOutput memory out) {
uint256 stakesToDrop = 0;
while (unstakeAmount > 0) {
// fetch vault stake storage reference
StakeData memory lastStake = stakes[stakes.length.sub(stakesToDrop).sub(1)];
// calculate stake duration
uint256 stakeDuration = timestamp.sub(lastStake.timestamp);
uint256 currentAmount;
if (lastStake.amount > unstakeAmount) {
// set current amount to remaining unstake amount
currentAmount = unstakeAmount;
// amount of last stake is reduced
out.lastStakeAmount = lastStake.amount.sub(unstakeAmount);
} else {
// set current amount to amount of last stake
currentAmount = lastStake.amount;
// add to stakes to drop
stakesToDrop += 1;
}
// update remaining unstakeAmount
unstakeAmount = unstakeAmount.sub(currentAmount);
// calculate reward amount
uint256 currentReward =
calculateReward(unlockedRewards, currentAmount, stakeDuration, totalStakeUnits, rewardScaling);
// update cumulative reward
out.reward = out.reward.add(currentReward);
// update cached unlockedRewards
unlockedRewards = unlockedRewards.sub(currentReward);
// calculate time weighted stake
uint256 stakeUnits = currentAmount.mul(stakeDuration);
// update cached totalStakeUnits
totalStakeUnits = totalStakeUnits.sub(stakeUnits);
}
// explicit return
return RewardOutput(out.lastStakeAmount, stakes.length.sub(stakesToDrop), out.reward, totalStakeUnits);
}
function calculateReward(
uint256 unlockedRewards,
uint256 stakeAmount,
uint256 stakeDuration,
uint256 totalStakeUnits,
RewardScaling memory rewardScaling
) public pure override returns (uint256 reward) {
// calculate time weighted stake
uint256 stakeUnits = stakeAmount.mul(stakeDuration);
// calculate base reward
// baseReward = unlockedRewards * stakeUnits / totalStakeUnits
uint256 baseReward = 0;
if (totalStakeUnits != 0) {
// scale reward according to proportional weight
baseReward = unlockedRewards.mul(stakeUnits).div(totalStakeUnits);
}
// calculate scaled reward
// if no scaling or scaling period completed
// reward = baseReward
// else
// minReward = baseReward * scalingFloor / scalingCeiling
// bonusReward = baseReward
// * (scalingCeiling - scalingFloor) / scalingCeiling
// * duration / scalingTime
// reward = minReward + bonusReward
if (stakeDuration >= rewardScaling.time || rewardScaling.floor == rewardScaling.ceiling) {
// no reward scaling applied
reward = baseReward;
} else {
// calculate minimum reward using scaling floor
uint256 minReward = baseReward.mul(rewardScaling.floor).div(rewardScaling.ceiling);
// calculate bonus reward with vested portion of scaling factor
uint256 bonusReward =
baseReward
.mul(stakeDuration)
.mul(rewardScaling.ceiling.sub(rewardScaling.floor))
.div(rewardScaling.ceiling)
.div(rewardScaling.time);
// add minimum reward and bonus reward
reward = minReward.add(bonusReward);
}
// explicit return
return reward;
}
/* admin functions */
/// @notice Add funds to the geyser
/// access control: only admin
/// state machine:
/// - can be called multiple times
/// - only online
/// state scope:
/// - increase _geyser.rewardSharesOutstanding
/// - append to _geyser.rewardSchedules
/// token transfer: transfer staking tokens from msg.sender to reward pool
/// @param amount uint256 Amount of reward tokens to deposit
/// @param duration uint256 Duration over which to linearly unlock rewards
function fundGeyser(uint256 amount, uint256 duration) external onlyOwner onlyOnline {
// validate duration
require(duration != 0, "Geyser: invalid duration");
// create new reward shares
// if existing rewards on this geyser
// mint new shares proportional to % change in rewards remaining
// newShares = remainingShares * newReward / remainingRewards
// else
// mint new shares with BASE_SHARES_PER_WEI initial conversion rate
// store as fixed point number with same of decimals as reward token
uint256 newRewardShares;
if (_geyser.rewardSharesOutstanding > 0) {
uint256 remainingRewards = IERC20(_geyser.rewardToken).balanceOf(_geyser.rewardPool);
newRewardShares = _geyser.rewardSharesOutstanding.mul(amount).div(remainingRewards);
} else {
newRewardShares = amount.mul(BASE_SHARES_PER_WEI);
}
// add reward shares to total
_geyser.rewardSharesOutstanding = _geyser.rewardSharesOutstanding.add(newRewardShares);
// store new reward schedule
_geyser.rewardSchedules.push(RewardSchedule(duration, block.timestamp, newRewardShares));
// transfer reward tokens to reward pool
TransferHelper.safeTransferFrom(_geyser.rewardToken, msg.sender, _geyser.rewardPool, amount);
// emit event
emit GeyserFunded(amount, duration);
}
/// @notice Add vault factory to whitelist
/// @dev use this function to enable stakes to vaults coming from the specified
/// factory contract
/// access control: only admin
/// state machine:
/// - can be called multiple times
/// - not shutdown
/// state scope:
/// - append to _vaultFactorySet
/// token transfer: none
/// @param factory address The address of the vault factory
function registerVaultFactory(address factory) external onlyOwner notShutdown {
// add factory to set
require(_vaultFactorySet.add(factory), "Geyser: vault factory already registered");
// emit event
emit VaultFactoryRegistered(factory);
}
/// @notice Remove vault factory from whitelist
/// @dev use this function to disable new stakes to vaults coming from the specified
/// factory contract.
/// note: vaults with existing stakes from this factory are sill able to unstake
/// access control: only admin
/// state machine:
/// - can be called multiple times
/// - not shutdown
/// state scope:
/// - remove from _vaultFactorySet
/// token transfer: none
/// @param factory address The address of the vault factory
function removeVaultFactory(address factory) external onlyOwner notShutdown {
// remove factory from set
require(_vaultFactorySet.remove(factory), "Geyser: vault factory not registered");
// emit event
emit VaultFactoryRemoved(factory);
}
/// @notice Register bonus token for distribution
/// @dev use this function to enable distribution of any ERC20 held by the RewardPool contract
/// access control: only admin
/// state machine:
/// - can be called multiple times
/// - only online
/// state scope:
/// - append to _bonusTokenSet
/// token transfer: none
/// @param bonusToken address The address of the bonus token
function registerBonusToken(address bonusToken) external onlyOwner onlyOnline {
// verify valid bonus token
_validateAddress(bonusToken);
// verify bonus token count
require(_bonusTokenSet.length() < MAX_REWARD_TOKENS, "Geyser: max bonus tokens reached ");
// add token to set
assert(_bonusTokenSet.add(bonusToken));
// emit event
emit BonusTokenRegistered(bonusToken);
}
/// @notice Rescue tokens from RewardPool
/// @dev use this function to rescue tokens from RewardPool contract
/// without distributing to stakers or triggering emergency shutdown
/// access control: only admin
/// state machine:
/// - can be called multiple times
/// - only online
/// state scope: none
/// token transfer: transfer requested token from RewardPool to recipient
/// @param token address The address of the token to rescue
/// @param recipient address The address of the recipient
/// @param amount uint256 The amount of tokens to rescue
function rescueTokensFromRewardPool(
address token,
address recipient,
uint256 amount
) external onlyOwner onlyOnline {
// verify recipient
_validateAddress(recipient);
// check not attempting to unstake reward token
require(token != _geyser.rewardToken, "Geyser: invalid address");
// check not attempting to wthdraw bonus token
require(!_bonusTokenSet.contains(token), "Geyser: invalid address");
// transfer tokens to recipient
IRewardPool(_geyser.rewardPool).sendERC20(token, recipient, amount);
}
/* user functions */
/// @notice Stake tokens
/// access control: anyone with a valid permission
/// state machine:
/// - can be called multiple times
/// - only online
/// - when vault exists on this geyser
/// state scope:
/// - append to _vaults[vault].stakes
/// - increase _vaults[vault].totalStake
/// - increase _geyser.totalStake
/// - increase _geyser.totalStakeUnits
/// - increase _geyser.lastUpdate
/// token transfer: transfer staking tokens from msg.sender to vault
/// @param vault address The address of the vault to stake from
/// @param amount uint256 The amount of staking tokens to stake
/// @param permission bytes The signed lock permission for the universal vault
function stake(
address vault,
uint256 amount,
bytes calldata permission
) external override onlyOnline {
// verify vault is valid
require(isValidVault(vault), "Geyser: vault is not registered");
// verify non-zero amount
require(amount != 0, "Geyser: no amount staked");
// fetch vault storage reference
VaultData storage vaultData = _vaults[vault];
// verify stakes boundary not reached
require(vaultData.stakes.length < MAX_STAKES_PER_VAULT, "Geyser: MAX_STAKES_PER_VAULT reached");
// update cached sum of stake units across all vaults
_updateTotalStakeUnits();
// store amount and timestamp
vaultData.stakes.push(StakeData(amount, block.timestamp));
// update cached total vault and geyser amounts
vaultData.totalStake = vaultData.totalStake.add(amount);
_geyser.totalStake = _geyser.totalStake.add(amount);
// call lock on vault
IUniversalVault(vault).lock(_geyser.stakingToken, amount, permission);
// emit event
emit Staked(vault, amount);
}
/// @notice Unstake staking tokens and claim reward
/// @dev rewards can only be claimed when unstaking, thus reseting the reward multiplier
/// access control: anyone with a valid permission
/// state machine:
/// - when vault exists on this geyser
/// - after stake from vault
/// - can be called multiple times while sufficient stake remains
/// - only online
/// state scope:
/// - decrease _geyser.rewardSharesOutstanding
/// - decrease _geyser.totalStake
/// - increase _geyser.lastUpdate
/// - modify _geyser.totalStakeUnits
/// - modify _vaults[vault].stakes
/// - decrease _vaults[vault].totalStake
/// token transfer:
/// - transfer reward tokens from reward pool to recipient
/// - transfer bonus tokens from reward pool to recipient
/// @param vault address The vault to unstake from
/// @param amount uint256 The amount of staking tokens to unstake
/// @param permission bytes The signed unlock permission for the universal vault
function unstakeAndClaim(
address vault,
uint256 amount,
bytes calldata permission
) external override onlyOnline {
// fetch vault storage reference
VaultData storage vaultData = _vaults[vault];
// verify non-zero amount
require(amount != 0, "Geyser: no amount unstaked");
// check for sufficient vault stake amount
require(vaultData.totalStake >= amount, "Geyser: insufficient vault stake");
// check for sufficient geyser stake amount
// if this check fails, there is a bug in stake accounting
assert(_geyser.totalStake >= amount);
// update cached sum of stake units across all vaults
_updateTotalStakeUnits();
// get reward amount remaining
uint256 remainingRewards = IERC20(_geyser.rewardToken).balanceOf(_geyser.rewardPool);
// calculate vested portion of reward pool
uint256 unlockedRewards =
calculateUnlockedRewards(
_geyser.rewardSchedules,
remainingRewards,
_geyser.rewardSharesOutstanding,
block.timestamp
);
// calculate vault time weighted reward with scaling
RewardOutput memory out =
calculateRewardFromStakes(
vaultData.stakes,
amount,
unlockedRewards,
_geyser.totalStakeUnits,
block.timestamp,
_geyser.rewardScaling
);
// update stake data in storage
if (out.newStakesCount == 0) {
// all stakes have been unstaked
delete vaultData.stakes;
} else {
// some stakes have been completely or partially unstaked
// delete fully unstaked stakes
while (vaultData.stakes.length > out.newStakesCount) vaultData.stakes.pop();
// only perform when lastStakeAmount is set
if (out.lastStakeAmount > 0) {
// update partially unstaked stake
vaultData.stakes[out.newStakesCount.sub(1)].amount = out.lastStakeAmount;
}
}
// update cached stake totals
vaultData.totalStake = vaultData.totalStake.sub(amount);
_geyser.totalStake = _geyser.totalStake.sub(amount);
_geyser.totalStakeUnits = out.newTotalStakeUnits;
// unlock staking tokens from vault
IUniversalVault(vault).unlock(_geyser.stakingToken, amount, permission);
// emit event
emit Unstaked(vault, amount);
// only perform on non-zero reward
if (out.reward > 0) {
// calculate shares to burn
// sharesToBurn = sharesOutstanding * reward / remainingRewards
uint256 sharesToBurn = _geyser.rewardSharesOutstanding.mul(out.reward).div(remainingRewards);
// burn claimed shares
_geyser.rewardSharesOutstanding = _geyser.rewardSharesOutstanding.sub(sharesToBurn);
// transfer bonus tokens from reward pool to recipient
if (_bonusTokenSet.length() > 0) {
for (uint256 index = 0; index < _bonusTokenSet.length(); index++) {
// fetch bonus token address reference
address bonusToken = _bonusTokenSet.at(index);
// calculate bonus token amount
// bonusAmount = bonusRemaining * reward / remainingRewards
uint256 bonusAmount =
IERC20(bonusToken).balanceOf(_geyser.rewardPool).mul(out.reward).div(remainingRewards);
// transfer if amount is non-zero
if (bonusAmount > 0) {
// transfer bonus token
IRewardPool(_geyser.rewardPool).sendERC20(bonusToken, vault, bonusAmount);
// emit event
emit RewardClaimed(vault, bonusToken, bonusAmount);
}
}
}
// transfer reward tokens from reward pool to recipient
IRewardPool(_geyser.rewardPool).sendERC20(_geyser.rewardToken, vault, out.reward);
// emit event
emit RewardClaimed(vault, _geyser.rewardToken, out.reward);
}
}
/// @notice Exit geyser without claiming reward
/// @dev This function should never revert when correctly called by the vault.
/// A max number of stakes per vault is set with MAX_STAKES_PER_VAULT to
/// place an upper bound on the for loop in calculateTotalStakeUnits().
/// access control: only callable by the vault directly
/// state machine:
/// - when vault exists on this geyser
/// - when active stake from this vault
/// - any power state
/// state scope:
/// - decrease _geyser.totalStake
/// - increase _geyser.lastUpdate
/// - modify _geyser.totalStakeUnits
/// - delete _vaults[vault]
/// token transfer: none
function rageQuit() external override {
// fetch vault storage reference
VaultData storage _vaultData = _vaults[msg.sender];
// revert if no active stakes
require(_vaultData.stakes.length != 0, "Geyser: no stake");
// update cached sum of stake units across all vaults
_updateTotalStakeUnits();
// emit event
emit Unstaked(msg.sender, _vaultData.totalStake);
// update cached totals
_geyser.totalStake = _geyser.totalStake.sub(_vaultData.totalStake);
_geyser.totalStakeUnits = _geyser.totalStakeUnits.sub(
calculateTotalStakeUnits(_vaultData.stakes, block.timestamp)
);
// delete stake data
delete _vaults[msg.sender];
}
/* convenience functions */
function _updateTotalStakeUnits() private {
// update cached totalStakeUnits
_geyser.totalStakeUnits = getCurrentTotalStakeUnits();
// update cached lastUpdate
_geyser.lastUpdate = block.timestamp;
}
function _validateAddress(address target) private view {
// sanity check target for potential input errors
require(isValidAddress(target), "Geyser: invalid address");
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
return _at(set._inner, index);
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint160(uint256(_at(set._inner, index))));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/Initializable.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.0;
// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
function safeApprove(
address token,
address to,
uint256 value
) internal {
// bytes4(keccak256(bytes('approve(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
require(
success && (data.length == 0 || abi.decode(data, (bool))),
'TransferHelper::safeApprove: approve failed'
);
}
function safeTransfer(
address token,
address to,
uint256 value
) internal {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
require(
success && (data.length == 0 || abi.decode(data, (bool))),
'TransferHelper::safeTransfer: transfer failed'
);
}
function safeTransferFrom(
address token,
address from,
address to,
uint256 value
) internal {
// bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
require(
success && (data.length == 0 || abi.decode(data, (bool))),
'TransferHelper::transferFrom: transferFrom failed'
);
}
function safeTransferETH(address to, uint256 value) internal {
(bool success, ) = to.call{value: value}(new bytes(0));
require(success, 'TransferHelper::safeTransferETH: ETH transfer failed');
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.6;
pragma abicoder v2;
import {SafeMath} from "@openzeppelin/contracts/math/SafeMath.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {Initializable} from "@openzeppelin/contracts/proxy/Initializable.sol";
import {EnumerableSet} from "@openzeppelin/contracts/utils/EnumerableSet.sol";
import {Address} from "@openzeppelin/contracts/utils/Address.sol";
import {TransferHelper} from "@uniswap/lib/contracts/libraries/TransferHelper.sol";
import {ERC1271} from "./Access/ERC1271.sol";
import {EIP712} from "./Access/EIP712.sol";
import {OwnableERC721} from "./Access/OwnableERC721.sol";
import {IRageQuit} from "./Geyser.sol";
interface IUniversalVault {
/* user events */
event Locked(address delegate, address token, uint256 amount);
event Unlocked(address delegate, address token, uint256 amount);
event RageQuit(address delegate, address token, bool notified, string reason);
/* data types */
struct LockData {
address delegate;
address token;
uint256 balance;
}
/* initialize function */
function initialize() external;
/* user functions */
function lock(
address token,
uint256 amount,
bytes calldata permission
) external;
function unlock(
address token,
uint256 amount,
bytes calldata permission
) external;
function rageQuit(address delegate, address token) external returns (bool notified, string memory error);
function transferERC20(
address token,
address to,
uint256 amount
) external;
function transferETH(address to, uint256 amount) external payable;
/* pure functions */
function calculateLockID(address delegate, address token) external pure returns (bytes32 lockID);
/* getter functions */
function getPermissionHash(
bytes32 eip712TypeHash,
address delegate,
address token,
uint256 amount,
uint256 nonce
) external view returns (bytes32 permissionHash);
function getNonce() external view returns (uint256 nonce);
function owner() external view returns (address ownerAddress);
function getLockSetCount() external view returns (uint256 count);
function getLockAt(uint256 index) external view returns (LockData memory lockData);
function getBalanceDelegated(address token, address delegate) external view returns (uint256 balance);
function getBalanceLocked(address token) external view returns (uint256 balance);
function checkBalances() external view returns (bool validity);
}
/// @title UniversalVault
/// @notice Vault for isolated storage of staking tokens
/// @dev Warning: not compatible with rebasing tokens
/// @dev Security contact: [email protected]
contract UniversalVault is IUniversalVault, EIP712("UniversalVault", "1.0.0"), ERC1271, OwnableERC721, Initializable {
using SafeMath for uint256;
using Address for address;
using Address for address payable;
using EnumerableSet for EnumerableSet.Bytes32Set;
/* constant */
// Hardcoding a gas limit for rageQuit() is required to prevent gas DOS attacks
// the gas requirement cannot be determined at runtime by querying the delegate
// as it could potentially be manipulated by a malicious delegate who could force
// the calls to revert.
// The gas limit could alternatively be set upon vault initialization or creation
// of a lock, but the gas consumption trade-offs are not favorable.
// Ultimately, to avoid a need for fixed gas limits, the EVM would need to provide
// an error code that allows for reliably catching out-of-gas errors on remote calls.
uint256 public constant RAGEQUIT_GAS = 500000;
bytes32 public constant LOCK_TYPEHASH =
keccak256("Lock(address delegate,address token,uint256 amount,uint256 nonce)");
bytes32 public constant UNLOCK_TYPEHASH =
keccak256("Unlock(address delegate,address token,uint256 amount,uint256 nonce)");
/* storage */
uint256 private _nonce;
mapping(bytes32 => LockData) private _locks;
EnumerableSet.Bytes32Set private _lockSet;
/* initialization function */
function initializeLock() external initializer {}
function initialize() external override initializer {
OwnableERC721._setNFT(msg.sender);
}
/* ether receive */
receive() external payable {}
/* internal overrides */
function _getOwner() internal view override(ERC1271) returns (address ownerAddress) {
return OwnableERC721.owner();
}
/* pure functions */
function calculateLockID(address delegate, address token) public pure override returns (bytes32 lockID) {
return keccak256(abi.encodePacked(delegate, token));
}
/* getter functions */
function getPermissionHash(
bytes32 eip712TypeHash,
address delegate,
address token,
uint256 amount,
uint256 nonce
) public view override returns (bytes32 permissionHash) {
return EIP712._hashTypedDataV4(keccak256(abi.encode(eip712TypeHash, delegate, token, amount, nonce)));
}
function getNonce() external view override returns (uint256 nonce) {
return _nonce;
}
function owner() public view override(IUniversalVault, OwnableERC721) returns (address ownerAddress) {
return OwnableERC721.owner();
}
function getLockSetCount() external view override returns (uint256 count) {
return _lockSet.length();
}
function getLockAt(uint256 index) external view override returns (LockData memory lockData) {
return _locks[_lockSet.at(index)];
}
function getBalanceDelegated(address token, address delegate) external view override returns (uint256 balance) {
return _locks[calculateLockID(delegate, token)].balance;
}
function getBalanceLocked(address token) public view override returns (uint256 balance) {
uint256 count = _lockSet.length();
for (uint256 index; index < count; index++) {
LockData storage _lockData = _locks[_lockSet.at(index)];
if (_lockData.token == token && _lockData.balance > balance) balance = _lockData.balance;
}
return balance;
}
function checkBalances() external view override returns (bool validity) {
// iterate over all token locks and validate sufficient balance
uint256 count = _lockSet.length();
for (uint256 index; index < count; index++) {
// fetch storage lock reference
LockData storage _lockData = _locks[_lockSet.at(index)];
// if insufficient balance and no∏t shutdown, return false
if (IERC20(_lockData.token).balanceOf(address(this)) < _lockData.balance) return false;
}
// if sufficient balance or shutdown, return true
return true;
}
/* user functions */
/// @notice Lock ERC20 tokens in the vault
/// access control: called by delegate with signed permission from owner
/// state machine: anytime
/// state scope:
/// - insert or update _locks
/// - increase _nonce
/// token transfer: none
/// @param token Address of token being locked
/// @param amount Amount of tokens being locked
/// @param permission Permission signature payload
function lock(
address token,
uint256 amount,
bytes calldata permission
)
external
override
onlyValidSignature(getPermissionHash(LOCK_TYPEHASH, msg.sender, token, amount, _nonce), permission)
{
// get lock id
bytes32 lockID = calculateLockID(msg.sender, token);
// add lock to storage
if (_lockSet.contains(lockID)) {
// if lock already exists, increase amount
_locks[lockID].balance = _locks[lockID].balance.add(amount);
} else {
// if does not exist, create new lock
// add lock to set
assert(_lockSet.add(lockID));
// add lock data to storage
_locks[lockID] = LockData(msg.sender, token, amount);
}
// validate sufficient balance
require(
IERC20(token).balanceOf(address(this)) >= _locks[lockID].balance,
"UniversalVault: insufficient balance"
);
// increase nonce
_nonce += 1;
// emit event
emit Locked(msg.sender, token, amount);
}
/// @notice Unlock ERC20 tokens in the vault
/// access control: called by delegate with signed permission from owner
/// state machine: after valid lock from delegate
/// state scope:
/// - remove or update _locks
/// - increase _nonce
/// token transfer: none
/// @param token Address of token being unlocked
/// @param amount Amount of tokens being unlocked
/// @param permission Permission signature payload
function unlock(
address token,
uint256 amount,
bytes calldata permission
)
external
override
onlyValidSignature(getPermissionHash(UNLOCK_TYPEHASH, msg.sender, token, amount, _nonce), permission)
{
// get lock id
bytes32 lockID = calculateLockID(msg.sender, token);
// validate existing lock
require(_lockSet.contains(lockID), "UniversalVault: missing lock");
// update lock data
if (_locks[lockID].balance > amount) {
// substract amount from lock balance
_locks[lockID].balance = _locks[lockID].balance.sub(amount);
} else {
// delete lock data
delete _locks[lockID];
assert(_lockSet.remove(lockID));
}
// increase nonce
_nonce += 1;
// emit event
emit Unlocked(msg.sender, token, amount);
}
/// @notice Forcibly cancel delegate lock
/// @dev This function will attempt to notify the delegate of the rage quit using
/// a fixed amount of gas.
/// access control: only owner
/// state machine: after valid lock from delegate
/// state scope:
/// - remove item from _locks
/// token transfer: none
/// @param delegate Address of delegate
/// @param token Address of token being unlocked
function rageQuit(address delegate, address token)
external
override
onlyOwner
returns (bool notified, string memory error)
{
// get lock id
bytes32 lockID = calculateLockID(delegate, token);
// validate existing lock
require(_lockSet.contains(lockID), "UniversalVault: missing lock");
// attempt to notify delegate
if (delegate.isContract()) {
// check for sufficient gas
require(gasleft() >= RAGEQUIT_GAS, "UniversalVault: insufficient gas");
// attempt rageQuit notification
try IRageQuit(delegate).rageQuit{gas: RAGEQUIT_GAS}() {
notified = true;
} catch Error(string memory res) {
notified = false;
error = res;
} catch (bytes memory) {
notified = false;
}
}
// update lock storage
assert(_lockSet.remove(lockID));
delete _locks[lockID];
// emit event
emit RageQuit(delegate, token, notified, error);
}
/// @notice Transfer ERC20 tokens out of vault
/// access control: only owner
/// state machine: when balance >= max(lock) + amount
/// state scope: none
/// token transfer: transfer any token
/// @param token Address of token being transferred
/// @param to Address of the recipient
/// @param amount Amount of tokens to transfer
function transferERC20(
address token,
address to,
uint256 amount
) external override onlyOwner {
// check for sufficient balance
require(
IERC20(token).balanceOf(address(this)) >= getBalanceLocked(token).add(amount),
"UniversalVault: insufficient balance"
);
// perform transfer
TransferHelper.safeTransfer(token, to, amount);
}
/// @notice Transfer ERC20 tokens out of vault
/// access control: only owner
/// state machine: when balance >= amount
/// state scope: none
/// token transfer: transfer any token
/// @param to Address of the recipient
/// @param amount Amount of ETH to transfer
function transferETH(address to, uint256 amount) external payable override onlyOwner {
// perform transfer
TransferHelper.safeTransferETH(to, amount);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.6;
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {TransferHelper} from "@uniswap/lib/contracts/libraries/TransferHelper.sol";
import {Powered} from "./PowerSwitch/Powered.sol";
interface IRewardPool {
function sendERC20(
address token,
address to,
uint256 value
) external;
function rescueERC20(address[] calldata tokens, address recipient) external;
}
/// @title Reward Pool
/// @notice Vault for isolated storage of reward tokens
/// @dev Security contact: [email protected]
contract RewardPool is IRewardPool, Powered, Ownable {
/* initializer */
constructor(address powerSwitch) {
Powered._setPowerSwitch(powerSwitch);
}
/* user functions */
/// @notice Send an ERC20 token
/// access control: only owner
/// state machine:
/// - can be called multiple times
/// - only online
/// state scope: none
/// token transfer: transfer tokens from self to recipient
/// @param token address The token to send
/// @param to address The recipient to send to
/// @param value uint256 Amount of tokens to send
function sendERC20(
address token,
address to,
uint256 value
) external override onlyOwner onlyOnline {
TransferHelper.safeTransfer(token, to, value);
}
/* emergency functions */
/// @notice Rescue multiple ERC20 tokens
/// access control: only power controller
/// state machine:
/// - can be called multiple times
/// - only shutdown
/// state scope: none
/// token transfer: transfer tokens from self to recipient
/// @param tokens address[] The tokens to rescue
/// @param recipient address The recipient to rescue to
function rescueERC20(address[] calldata tokens, address recipient) external override onlyShutdown {
// only callable by controller
require(msg.sender == Powered.getPowerController(), "RewardPool: only controller can withdraw after shutdown");
// assert recipient is defined
require(recipient != address(0), "RewardPool: recipient not defined");
// transfer tokens
for (uint256 index = 0; index < tokens.length; index++) {
// get token
address token = tokens[index];
// get balance
uint256 balance = IERC20(token).balanceOf(address(this));
// transfer token
TransferHelper.safeTransfer(token, recipient, balance);
}
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.6;
interface IFactory {
function create(bytes calldata args) external returns (address instance);
function create2(bytes calldata args, bytes32 salt) external returns (address instance);
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.6;
import {EnumerableSet} from "@openzeppelin/contracts/utils/EnumerableSet.sol";
interface IInstanceRegistry {
/* events */
event InstanceAdded(address instance);
event InstanceRemoved(address instance);
/* view functions */
function isInstance(address instance) external view returns (bool validity);
function instanceCount() external view returns (uint256 count);
function instanceAt(uint256 index) external view returns (address instance);
}
/// @title InstanceRegistry
/// @dev Security contact: [email protected]
contract InstanceRegistry is IInstanceRegistry {
using EnumerableSet for EnumerableSet.AddressSet;
/* storage */
EnumerableSet.AddressSet private _instanceSet;
/* view functions */
function isInstance(address instance) external view override returns (bool validity) {
return _instanceSet.contains(instance);
}
function instanceCount() external view override returns (uint256 count) {
return _instanceSet.length();
}
function instanceAt(uint256 index) external view override returns (address instance) {
return _instanceSet.at(index);
}
/* admin functions */
function _register(address instance) internal {
require(_instanceSet.add(instance), "InstanceRegistry: already registered");
emit InstanceAdded(instance);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.6;
import {IPowerSwitch} from "./PowerSwitch.sol";
interface IPowered {
function isOnline() external view returns (bool status);
function isOffline() external view returns (bool status);
function isShutdown() external view returns (bool status);
function getPowerSwitch() external view returns (address powerSwitch);
function getPowerController() external view returns (address controller);
}
/// @title Powered
/// @notice Helper for calling external PowerSwitch
/// @dev Security contact: [email protected]
contract Powered is IPowered {
/* storage */
address private _powerSwitch;
/* modifiers */
modifier onlyOnline() {
_onlyOnline();
_;
}
modifier onlyOffline() {
_onlyOffline();
_;
}
modifier notShutdown() {
_notShutdown();
_;
}
modifier onlyShutdown() {
_onlyShutdown();
_;
}
/* initializer */
function _setPowerSwitch(address powerSwitch) internal {
_powerSwitch = powerSwitch;
}
/* getter functions */
function isOnline() public view override returns (bool status) {
return IPowerSwitch(_powerSwitch).isOnline();
}
function isOffline() public view override returns (bool status) {
return IPowerSwitch(_powerSwitch).isOffline();
}
function isShutdown() public view override returns (bool status) {
return IPowerSwitch(_powerSwitch).isShutdown();
}
function getPowerSwitch() public view override returns (address powerSwitch) {
return _powerSwitch;
}
function getPowerController() public view override returns (address controller) {
return IPowerSwitch(_powerSwitch).getPowerController();
}
/* convenience functions */
function _onlyOnline() private view {
require(isOnline(), "Powered: is not online");
}
function _onlyOffline() private view {
require(isOffline(), "Powered: is not offline");
}
function _notShutdown() private view {
require(!isShutdown(), "Powered: is shutdown");
}
function _onlyShutdown() private view {
require(isShutdown(), "Powered: is not shutdown");
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../proxy/Initializable.sol";
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
// solhint-disable-next-line compiler-version
pragma solidity >=0.4.24 <0.8.0;
import "../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// solhint-disable-next-line compiler-version
pragma solidity >=0.4.24 <0.8.0;
import "../utils/Address.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function _isConstructor() private view returns (bool) {
return !Address.isContract(address(this));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.6;
import {ECDSA} from "@openzeppelin/contracts/cryptography/ECDSA.sol";
import {Address} from "@openzeppelin/contracts/utils/Address.sol";
interface IERC1271 {
function isValidSignature(bytes32 _messageHash, bytes memory _signature) external view returns (bytes4 magicValue);
}
library SignatureChecker {
function isValidSignature(
address signer,
bytes32 hash,
bytes memory signature
) internal view returns (bool) {
if (Address.isContract(signer)) {
bytes4 selector = IERC1271.isValidSignature.selector;
(bool success, bytes memory returndata) =
signer.staticcall(abi.encodeWithSelector(selector, hash, signature));
return success && abi.decode(returndata, (bytes4)) == selector;
} else {
return ECDSA.recover(hash, signature) == signer;
}
}
}
/// @title ERC1271
/// @notice Module for ERC1271 compatibility
/// @dev Security contact: [email protected]
abstract contract ERC1271 is IERC1271 {
// Valid magic value bytes4(keccak256("isValidSignature(bytes32,bytes)")
bytes4 internal constant VALID_SIG = IERC1271.isValidSignature.selector;
// Invalid magic value
bytes4 internal constant INVALID_SIG = bytes4(0);
modifier onlyValidSignature(bytes32 permissionHash, bytes memory signature) {
require(isValidSignature(permissionHash, signature) == VALID_SIG, "ERC1271: Invalid signature");
_;
}
function _getOwner() internal view virtual returns (address owner);
function isValidSignature(bytes32 permissionHash, bytes memory signature) public view override returns (bytes4) {
return SignatureChecker.isValidSignature(_getOwner(), permissionHash, signature) ? VALID_SIG : INVALID_SIG;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/* solhint-disable max-line-length */
/**
* @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
*
* The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
* thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
* they need in their contracts using a combination of `abi.encode` and `keccak256`.
*
* This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
* scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
* ({_hashTypedDataV4}).
*
* The implementation of the domain separator was designed to be as efficient as possible while still properly updating
* the chain id to protect against replay attacks on an eventual fork of the chain.
*
* NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
* https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
*
* _Available since v3.4._
*/
abstract contract EIP712 {
/* solhint-disable var-name-mixedcase */
bytes32 private immutable _HASHED_NAME;
bytes32 private immutable _HASHED_VERSION;
bytes32 private constant _TYPE_HASH =
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");
/* solhint-enable var-name-mixedcase */
/**
* @dev Initializes the domain separator and parameter caches.
*
* The meaning of `name` and `version` is specified in
* https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
*
* - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
* - `version`: the current major version of the signing domain.
*
* NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
* contract upgrade].
*/
constructor(string memory name, string memory version) {
_HASHED_NAME = keccak256(bytes(name));
_HASHED_VERSION = keccak256(bytes(version));
}
/**
* @dev Returns the domain separator for the current chain.
*/
function _domainSeparatorV4() internal view returns (bytes32) {
return _buildDomainSeparator(_TYPE_HASH, _EIP712NameHash(), _EIP712VersionHash());
}
function _buildDomainSeparator(
bytes32 typeHash,
bytes32 name,
bytes32 version
) private view returns (bytes32) {
return keccak256(abi.encode(typeHash, name, version, _getChainId(), address(this)));
}
/**
* @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
* function returns the hash of the fully encoded EIP712 message for this domain.
*
* This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
*
* ```solidity
* bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
* keccak256("Mail(address to,string contents)"),
* mailTo,
* keccak256(bytes(mailContents))
* )));
* address signer = ECDSA.recover(digest, signature);
* ```
*/
function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", _domainSeparatorV4(), structHash));
}
function _getChainId() private view returns (uint256 chainId) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
// solhint-disable-next-line no-inline-assembly
assembly {
chainId := chainid()
}
}
/**
* @dev The hash of the name parameter for the EIP712 domain.
*
* NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs
* are a concern.
*/
function _EIP712NameHash() internal view virtual returns (bytes32) {
return _HASHED_NAME;
}
/**
* @dev The hash of the version parameter for the EIP712 domain.
*
* NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs
* are a concern.
*/
function _EIP712VersionHash() internal view virtual returns (bytes32) {
return _HASHED_VERSION;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.6;
import {IERC721} from "@openzeppelin/contracts/token/ERC721/IERC721.sol";
/// @title OwnableERC721
/// @notice Use ERC721 ownership for access control
/// @dev Security contact: [email protected]
contract OwnableERC721 {
address private _nftAddress;
modifier onlyOwner() {
require(owner() == msg.sender, "OwnableERC721: caller is not the owner");
_;
}
function _setNFT(address nftAddress) internal {
_nftAddress = nftAddress;
}
function nft() public view virtual returns (address nftAddress) {
return _nftAddress;
}
function owner() public view virtual returns (address ownerAddress) {
return IERC721(_nftAddress).ownerOf(uint256(address(this)));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
// Check the signature length
if (signature.length != 65) {
revert("ECDSA: invalid signature length");
}
// Divide the signature in r, s and v variables
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
// solhint-disable-next-line no-inline-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return recover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover-bytes32-bytes-} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "ECDSA: invalid signature 's' value");
require(v == 27 || v == 28, "ECDSA: invalid signature 'v' value");
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
require(signer != address(0), "ECDSA: invalid signature");
return signer;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* replicates the behavior of the
* https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign[`eth_sign`]
* JSON-RPC method.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "../../introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.6;
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
interface IPowerSwitch {
/* admin events */
event PowerOn();
event PowerOff();
event EmergencyShutdown();
/* data types */
enum State {Online, Offline, Shutdown}
/* admin functions */
function powerOn() external;
function powerOff() external;
function emergencyShutdown() external;
/* view functions */
function isOnline() external view returns (bool status);
function isOffline() external view returns (bool status);
function isShutdown() external view returns (bool status);
function getStatus() external view returns (State status);
function getPowerController() external view returns (address controller);
}
/// @title PowerSwitch
/// @notice Standalone pausing and emergency stop functionality
/// @dev Security contact: [email protected]
contract PowerSwitch is IPowerSwitch, Ownable {
/* storage */
IPowerSwitch.State private _status;
/* initializer */
constructor(address owner) {
// sanity check owner
require(owner != address(0), "PowerSwitch: invalid owner");
// transfer ownership
Ownable.transferOwnership(owner);
}
/* admin functions */
/// @notice Turn Power On
/// access control: only admin
/// state machine: only when offline
/// state scope: only modify _status
/// token transfer: none
function powerOn() external override onlyOwner {
require(_status == IPowerSwitch.State.Offline, "PowerSwitch: cannot power on");
_status = IPowerSwitch.State.Online;
emit PowerOn();
}
/// @notice Turn Power Off
/// access control: only admin
/// state machine: only when online
/// state scope: only modify _status
/// token transfer: none
function powerOff() external override onlyOwner {
require(_status == IPowerSwitch.State.Online, "PowerSwitch: cannot power off");
_status = IPowerSwitch.State.Offline;
emit PowerOff();
}
/// @notice Shutdown Permanently
/// access control: only admin
/// state machine:
/// - when online or offline
/// - can only be called once
/// state scope: only modify _status
/// token transfer: none
function emergencyShutdown() external override onlyOwner {
require(_status != IPowerSwitch.State.Shutdown, "PowerSwitch: cannot shutdown");
_status = IPowerSwitch.State.Shutdown;
emit EmergencyShutdown();
}
/* getter functions */
function isOnline() external view override returns (bool status) {
return _status == State.Online;
}
function isOffline() external view override returns (bool status) {
return _status == State.Offline;
}
function isShutdown() external view override returns (bool status) {
return _status == State.Shutdown;
}
function getStatus() external view override returns (IPowerSwitch.State status) {
return _status;
}
function getPowerController() external view override returns (address controller) {
return Ownable.owner();
}
}
| @notice Lock ERC20 tokens in the vault access control: called by delegate with signed permission from owner state machine: anytime state scope: - insert or update _locks - increase _nonce token transfer: none @param token Address of token being locked @param amount Amount of tokens being locked @param permission Permission signature payload get lock id add lock to storage if lock already exists, increase amount if does not exist, create new lock add lock to set add lock data to storage | function lock(
address token,
uint256 amount,
bytes calldata permission
)
external
override
onlyValidSignature(getPermissionHash(LOCK_TYPEHASH, msg.sender, token, amount, _nonce), permission)
{
bytes32 lockID = calculateLockID(msg.sender, token);
if (_lockSet.contains(lockID)) {
_locks[lockID].balance = _locks[lockID].balance.add(amount);
assert(_lockSet.add(lockID));
_locks[lockID] = LockData(msg.sender, token, amount);
}
IERC20(token).balanceOf(address(this)) >= _locks[lockID].balance,
"UniversalVault: insufficient balance"
);
}
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./partial_match/1/0xCc982d33525EBFB14B9c504428d02082043817D7/sources/contracts/ERC1155Bridges/L1ERC1155Bridge.sol | /** * @inheritdoc iL1ERC1155Bridge */ | function depositBatchTo(
address _l1Contract,
address _to,
uint256[] memory _tokenIds,
uint256[] memory _amounts,
bytes memory _data,
uint32 _l2Gas
)
external
virtual
override
nonReentrant()
whenNotPaused()
{
_initiateDepositBatch(_l1Contract, msg.sender, _to, _tokenIds, _amounts, _data, _l2Gas);
}
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./full_match/1001/0xCe12C887FAe83A5f94f6cF3C8d4C1ceE8B1C7786/sources/contracts/libraries/DexLibrary.sol | fetches and sorts the reserves for a pair | function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) {
(address token0,) = sortTokens(tokenA, tokenB);
(uint reserve0, uint reserve1,) = IDexPair(pairFor(factory, tokenA, tokenB)).getReserves();
(reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
}
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./full_match/80001/0x9310e3ff6D3Fb88AdFD2910ecffDFc5Cf220209D/sources/contracts/modules/Map.sol | ---- internals ---- | function rebuild() public onlyInternals {
uint8 depth = 0;
for (uint8 x = 0; x < CFG_MAP_MAX_SIZE; x++) {
depth = x;
for (uint8 y = 0; y < CFG_MAP_MAX_SIZE; y++) {
uint8 depthY;
for (uint8 z = 0; z < CFG_MAP_MAX_SIZE; z++) {
uint8 depthZ;
_map[x][y][z] = getBlockDepth(x,y,z);
}
}
}
}
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pragma solidity ^0.4.21;
// File: zeppelin-solidity/contracts/math/SafeMath.sol
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
// File: zeppelin-solidity/contracts/token/ERC20/ERC20Basic.sol
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
// File: zeppelin-solidity/contracts/token/ERC20/BasicToken.sol
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
// File: zeppelin-solidity/contracts/token/ERC20/ERC20.sol
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: zeppelin-solidity/contracts/token/ERC20/StandardToken.sol
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
// File: contracts/PentacoreToken.sol
/**
* @title Smart Contract which defines the token managed by the Pentacore Hedge Fund.
* @author Jordan Stojanovski
*/
contract PentacoreToken is StandardToken {
using SafeMath for uint256;
string public name = 'PentacoreToken';
string public symbol = 'PENT';
uint256 public constant million = 1000000;
uint256 public constant tokenCap = 1000 * million; // one billion tokens
bool public isPaused = true;
// Unlike the common practice to put the whitelist checks in the crowdsale,
// the PentacoreToken does these tests itself. This is mandated by legal
// issues, as follows:
// - The exchange can be anywhere and it should not be concerned with
// Pentacore's whitelisting methods. If the exchange desires, it can
// perform its own KYC.
// - Even after the Crowdsale / ICO if a whitelisted owner tries to sell
// their tokens to a non-whitelisted buyer (address), the seller shall be
// directed to the KYC process to be whitelisted before the sale can proceed.
// This prevents against selling tokens to buyers under embargo.
// - If the seller is removed from the whitelist prior to the sale attempt,
// the corresponding sale should be reported to the authorities instead of
// allowing the seller to proceed. This is subject of further discussion.
mapping(address => bool) public whitelist;
// If set to true, allow transfers between any addresses regardless of whitelist.
// However, sale and/or redemption would still be not allowed regardless of this flag.
// In the future, if it is determined that it is legal to transfer but not sell and/or redeem,
// we could turn this flag on.
bool public isFreeTransferAllowed = false;
uint256 public tokenNAVMicroUSD; // Net Asset Value per token in MicroUSD (millionths of 1 US$)
uint256 public weiPerUSD; // How many Wei is one US$
// Who's Who
address public owner; // The owner of this contract.
address public kycAdmin; // The address of the caller which can update the KYC status of an address.
address public navAdmin; // The address of the caller which can update the NAV/USD and ETH/USD values.
address public crowdsale; //The address of the crowdsale contract.
address public redemption; // The address of the redemption contract.
address public distributedAutonomousExchange; // The address of the exchange contract.
event Mint(address indexed to, uint256 amount);
event Burn(uint256 amount);
event AddToWhitelist(address indexed beneficiary);
event RemoveFromWhitelist(address indexed beneficiary);
function PentacoreToken() public {
owner = msg.sender;
tokenNAVMicroUSD = million; // Initially 1 PENT = 1 US$ (a million millionths)
isFreeTransferAllowed = false;
isPaused = true;
totalSupply_ = 0; // No tokens exist at creation. They are minted as sold.
}
/**
* @dev Throws if called by any account other than the authorized one.
* @param authorized the address of the authorized caller.
*/
modifier onlyBy(address authorized) {
require(authorized != address(0));
require(msg.sender == authorized);
_;
}
/**
* @dev Pauses / unpauses the transferability of the token.
* @param _pause pause if true; unpause if false
*/
function setPaused(bool _pause) public {
require(owner != address(0));
require(msg.sender == owner);
isPaused = _pause;
}
modifier notPaused() {
require(!isPaused);
_;
}
/**
* @dev Sets the address of the owner.
* @param _address The address of the new owner of the Token Contract.
*/
function transferOwnership(address _address) external onlyBy(owner) {
require(_address != address(0)); // Prevent rendering it unusable
owner = _address;
}
/**
* @dev Sets the address of the PentacoreCrowdsale contract.
* @param _address PentacoreCrowdsale contract address.
*/
function setKYCAdmin(address _address) external onlyBy(owner) {
kycAdmin = _address;
}
/**
* @dev Sets the address of the PentacoreCrowdsale contract.
* @param _address PentacoreCrowdsale contract address.
*/
function setNAVAdmin(address _address) external onlyBy(owner) {
navAdmin = _address;
}
/**
* @dev Sets the address of the PentacoreCrowdsale contract.
* @param _address PentacoreCrowdsale contract address.
*/
function setCrowdsaleContract(address _address) external onlyBy(owner) {
crowdsale = _address;
}
/**
* @dev Sets the address of the PentacoreRedemption contract.
* @param _address PentacoreRedemption contract address.
*/
function setRedemptionContract(address _address) external onlyBy(owner) {
redemption = _address;
}
/**
* @dev Sets the address of the DistributedAutonomousExchange contract.
* @param _address DistributedAutonomousExchange contract address.
*/
function setDistributedAutonomousExchange(address _address) external onlyBy(owner) {
distributedAutonomousExchange = _address;
}
/**
* @dev Sets the token price in US$. Set by owner to reflect NAV/token.
* @param _price PentacoreToken price in USD.
*/
function setTokenNAVMicroUSD(uint256 _price) external onlyBy(navAdmin) {
tokenNAVMicroUSD = _price;
}
/**
* @dev Sets the token price in US$. Set by owner to reflect NAV/token.
* @param _price PentacoreToken price in USD.
*/
function setWeiPerUSD(uint256 _price) external onlyBy(navAdmin) {
weiPerUSD = _price;
}
/**
* @dev Calculate the amount of Wei for a given token amount. The result is rounded down (floored) to a millionth of a US$)
* @param _tokenAmount Whole number of tokens to be converted to Wei
* @return amount of Wei for the given amount of tokens
*/
function tokensToWei(uint256 _tokenAmount) public view returns (uint256) {
require(tokenNAVMicroUSD != uint256(0));
require(weiPerUSD != uint256(0));
return _tokenAmount.mul(tokenNAVMicroUSD).mul(weiPerUSD).div(million);
}
/**
* @dev Calculate the amount tokens for a given Wei amount and the amount of change in Wei.
* @param _weiAmount Whole number of Wei to be converted to tokens
* @return whole amount of tokens for the given amount in Wei
* @return change in Wei that is not sufficient to buy a whole token
*/
function weiToTokens(uint256 _weiAmount) public view returns (uint256, uint256) {
require(tokenNAVMicroUSD != uint256(0));
require(weiPerUSD != uint256(0));
uint256 tokens = _weiAmount.mul(million).div(weiPerUSD).div(tokenNAVMicroUSD);
uint256 changeWei = _weiAmount.sub(tokensToWei(tokens));
return (tokens, changeWei);
}
/**
* @dev Allows / disallows free transferability of tokens regardless of whitelist.
* @param _isFreeTransferAllowed disregard whitelist if true; not if false
*/
function setFreeTransferAllowed(bool _isFreeTransferAllowed) public {
require(owner != address(0));
require(msg.sender == owner);
isFreeTransferAllowed = _isFreeTransferAllowed;
}
/**
* @dev Reverts if beneficiary is not whitelisted. Can be used when extending this contract.
* @param _beneficiary the address which must be whitelisted by the KYC process in order to pass.
*/
modifier isWhitelisted(address _beneficiary) {
require(whitelist[_beneficiary]);
_;
}
/**
* @dev Reverts if beneficiary is not whitelisted and isFreeTransferAllowed is false. Can be used when extending this contract.
* @param _beneficiary the address which must be whitelisted by the KYC process in order to pass unless isFreeTransferAllowed.
*/
modifier isWhitelistedOrFreeTransferAllowed(address _beneficiary) {
require(isFreeTransferAllowed || whitelist[_beneficiary]);
_;
}
/**
* @dev Adds single address to whitelist.
* @param _beneficiary Address to be added to the whitelist
*/
function addToWhitelist(address _beneficiary) public onlyBy(kycAdmin) {
whitelist[_beneficiary] = true;
emit AddToWhitelist(_beneficiary);
}
/**
* @dev Adds list of addresses to whitelist.
* @param _beneficiaries List of addresses to be added to the whitelist
*/
function addManyToWhitelist(address[] _beneficiaries) external onlyBy(kycAdmin) {
for (uint256 i = 0; i < _beneficiaries.length; i++) addToWhitelist(_beneficiaries[i]);
}
/**
* @dev Removes single address from whitelist.
* @param _beneficiary Address to be removed to the whitelist
*/
function removeFromWhitelist(address _beneficiary) public onlyBy(kycAdmin) {
whitelist[_beneficiary] = false;
emit RemoveFromWhitelist(_beneficiary);
}
/**
* @dev Removes list of addresses from whitelist.
* @param _beneficiaries List of addresses to be removed to the whitelist
*/
function removeManyFromWhitelist(address[] _beneficiaries) external onlyBy(kycAdmin) {
for (uint256 i = 0; i < _beneficiaries.length; i++) removeFromWhitelist(_beneficiaries[i]);
}
/**
* @dev Function to mint tokens. We mint as we sell tokens (actually the PentacoreCrowdsale contract does).
* @dev The recipient should be whitelisted.
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) public onlyBy(crowdsale) isWhitelisted(_to) returns (bool) {
// Should run even when the token is paused.
require(tokenNAVMicroUSD != uint256(0));
require(weiPerUSD != uint256(0));
require(totalSupply_.add(_amount) <= tokenCap);
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
return true;
}
/**
* @dev Function to burn tokens. We burn as owners redeem tokens (actually the PentacoreRedemptions contract does).
* @param _amount The amount of tokens to burn.
* @return A boolean that indicates if the operation was successful.
*/
function burn(uint256 _amount) public onlyBy(redemption) returns (bool) {
// Should run even when the token is paused.
require(balances[redemption].sub(_amount) >= uint256(0));
require(totalSupply_.sub(_amount) >= uint256(0));
balances[redemption] = balances[redemption].sub(_amount);
totalSupply_ = totalSupply_.sub(_amount);
emit Burn(_amount);
return true;
}
/**
* @dev transfer token for a specified address
* @dev Both the sender and the recipient should be whitelisted.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public notPaused isWhitelistedOrFreeTransferAllowed(msg.sender) isWhitelistedOrFreeTransferAllowed(_to) returns (bool) {
return super.transfer(_to, _value);
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* @dev The sender should be whitelisted.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public notPaused isWhitelistedOrFreeTransferAllowed(msg.sender) returns (bool) {
return super.approve(_spender, _value);
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
* @dev The sender should be whitelisted.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public notPaused isWhitelistedOrFreeTransferAllowed(msg.sender) returns (bool) {
return super.increaseApproval(_spender, _addedValue);
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
*
* @dev The sender does not need to be whitelisted. This is in case they are removed from white list and no longer agree to sell at an exchange.
* @dev This function stays untouched (directly inherited), but it's re-defined for clarity:
*
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
return super.decreaseApproval(_spender, _subtractedValue);
}
/**
* @dev Transfer tokens from one address to another
* @dev Both the sender and the recipient should be whitelisted.
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public notPaused isWhitelistedOrFreeTransferAllowed(_from) isWhitelistedOrFreeTransferAllowed(_to) returns (bool) {
return super.transferFrom(_from, _to, _value);
}
} | * @title Smart Contract which defines the token managed by the Pentacore Hedge Fund. @author Jordan Stojanovski/ Unlike the common practice to put the whitelist checks in the crowdsale, the PentacoreToken does these tests itself. This is mandated by legal issues, as follows: - The exchange can be anywhere and it should not be concerned with Pentacore's whitelisting methods. If the exchange desires, it can perform its own KYC. - Even after the Crowdsale / ICO if a whitelisted owner tries to sell their tokens to a non-whitelisted buyer (address), the seller shall be directed to the KYC process to be whitelisted before the sale can proceed. This prevents against selling tokens to buyers under embargo. - If the seller is removed from the whitelist prior to the sale attempt, the corresponding sale should be reported to the authorities instead of allowing the seller to proceed. This is subject of further discussion. If set to true, allow transfers between any addresses regardless of whitelist. However, sale and/or redemption would still be not allowed regardless of this flag. In the future, if it is determined that it is legal to transfer but not sell and/or redeem, we could turn this flag on. Who's Who | contract PentacoreToken is StandardToken {
using SafeMath for uint256;
string public name = 'PentacoreToken';
string public symbol = 'PENT';
uint256 public constant million = 1000000;
bool public isPaused = true;
mapping(address => bool) public whitelist;
bool public isFreeTransferAllowed = false;
event Mint(address indexed to, uint256 amount);
event Burn(uint256 amount);
event AddToWhitelist(address indexed beneficiary);
event RemoveFromWhitelist(address indexed beneficiary);
function PentacoreToken() public {
owner = msg.sender;
isFreeTransferAllowed = false;
isPaused = true;
}
modifier onlyBy(address authorized) {
require(authorized != address(0));
require(msg.sender == authorized);
_;
}
function setPaused(bool _pause) public {
require(owner != address(0));
require(msg.sender == owner);
isPaused = _pause;
}
modifier notPaused() {
require(!isPaused);
_;
}
function transferOwnership(address _address) external onlyBy(owner) {
owner = _address;
}
function setKYCAdmin(address _address) external onlyBy(owner) {
kycAdmin = _address;
}
function setNAVAdmin(address _address) external onlyBy(owner) {
navAdmin = _address;
}
function setCrowdsaleContract(address _address) external onlyBy(owner) {
crowdsale = _address;
}
function setRedemptionContract(address _address) external onlyBy(owner) {
redemption = _address;
}
function setDistributedAutonomousExchange(address _address) external onlyBy(owner) {
distributedAutonomousExchange = _address;
}
function setTokenNAVMicroUSD(uint256 _price) external onlyBy(navAdmin) {
tokenNAVMicroUSD = _price;
}
function setWeiPerUSD(uint256 _price) external onlyBy(navAdmin) {
weiPerUSD = _price;
}
function tokensToWei(uint256 _tokenAmount) public view returns (uint256) {
require(tokenNAVMicroUSD != uint256(0));
require(weiPerUSD != uint256(0));
return _tokenAmount.mul(tokenNAVMicroUSD).mul(weiPerUSD).div(million);
}
function weiToTokens(uint256 _weiAmount) public view returns (uint256, uint256) {
require(tokenNAVMicroUSD != uint256(0));
require(weiPerUSD != uint256(0));
uint256 tokens = _weiAmount.mul(million).div(weiPerUSD).div(tokenNAVMicroUSD);
uint256 changeWei = _weiAmount.sub(tokensToWei(tokens));
return (tokens, changeWei);
}
function setFreeTransferAllowed(bool _isFreeTransferAllowed) public {
require(owner != address(0));
require(msg.sender == owner);
isFreeTransferAllowed = _isFreeTransferAllowed;
}
modifier isWhitelisted(address _beneficiary) {
require(whitelist[_beneficiary]);
_;
}
modifier isWhitelistedOrFreeTransferAllowed(address _beneficiary) {
require(isFreeTransferAllowed || whitelist[_beneficiary]);
_;
}
function addToWhitelist(address _beneficiary) public onlyBy(kycAdmin) {
whitelist[_beneficiary] = true;
emit AddToWhitelist(_beneficiary);
}
function addManyToWhitelist(address[] _beneficiaries) external onlyBy(kycAdmin) {
for (uint256 i = 0; i < _beneficiaries.length; i++) addToWhitelist(_beneficiaries[i]);
}
function removeFromWhitelist(address _beneficiary) public onlyBy(kycAdmin) {
whitelist[_beneficiary] = false;
emit RemoveFromWhitelist(_beneficiary);
}
function removeManyFromWhitelist(address[] _beneficiaries) external onlyBy(kycAdmin) {
for (uint256 i = 0; i < _beneficiaries.length; i++) removeFromWhitelist(_beneficiaries[i]);
}
function mint(address _to, uint256 _amount) public onlyBy(crowdsale) isWhitelisted(_to) returns (bool) {
require(tokenNAVMicroUSD != uint256(0));
require(weiPerUSD != uint256(0));
require(totalSupply_.add(_amount) <= tokenCap);
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
return true;
}
function burn(uint256 _amount) public onlyBy(redemption) returns (bool) {
require(balances[redemption].sub(_amount) >= uint256(0));
require(totalSupply_.sub(_amount) >= uint256(0));
balances[redemption] = balances[redemption].sub(_amount);
totalSupply_ = totalSupply_.sub(_amount);
emit Burn(_amount);
return true;
}
function transfer(address _to, uint256 _value) public notPaused isWhitelistedOrFreeTransferAllowed(msg.sender) isWhitelistedOrFreeTransferAllowed(_to) returns (bool) {
return super.transfer(_to, _value);
}
function approve(address _spender, uint256 _value) public notPaused isWhitelistedOrFreeTransferAllowed(msg.sender) returns (bool) {
return super.approve(_spender, _value);
}
function increaseApproval(address _spender, uint _addedValue) public notPaused isWhitelistedOrFreeTransferAllowed(msg.sender) returns (bool) {
return super.increaseApproval(_spender, _addedValue);
}
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
return super.decreaseApproval(_spender, _subtractedValue);
}
function transferFrom(address _from, address _to, uint256 _value) public notPaused isWhitelistedOrFreeTransferAllowed(_from) isWhitelistedOrFreeTransferAllowed(_to) returns (bool) {
return super.transferFrom(_from, _to, _value);
}
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] |
./partial_match/1/0x45806417D10159B7BAce7387fb554110c0d62d67/sources/ValueLiquidPair.sol | called once by the factory at time of deployment sufficient check | function initialize(
address _token0,
address _token1,
uint32 _tokenWeight0,
uint32 _swapFee
) external {
require(msg.sender == factory, "VLP: FORBIDDEN");
string memory _symbol0 = IERC20(_token0).symbol();
string memory _symbol1 = IERC20(_token1).symbol();
initialize(string(abi.encodePacked(_symbol0, "/", _symbol1, " Value LP")), string(abi.encodePacked(_symbol0, _symbol1)));
token0 = _token0;
token1 = _token1;
tokenWeight0 = _tokenWeight0;
swapFee = _swapFee;
formula = IValueLiquidFactory(factory).formula();
}
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./full_match/43114/0x78F48e2e68A7C09E22fBa362C0FccA51b4772683/sources/IglooMasterV7.10_Strategies.sol | owned by an IglooStrategy contractscaled up by ACC_PEFI_PRECISIONpending reward = (user.amount * rewardTokensPerShare) / ACC_PEFI_PRECISION - user.rewardDebt | contract IglooStrategyStorage is Ownable {
uint256 public rewardTokensPerShare;
uint256 internal constant ACC_PEFI_PRECISION = 1e18;
mapping(address => uint256) public rewardDebt;
function increaseRewardDebt(address user, uint256 shareAmount) external onlyOwner {
rewardDebt[user] += (rewardTokensPerShare * shareAmount);
}
function decreaseRewardDebt(address user, uint256 shareAmount) external onlyOwner {
rewardDebt[user] -= (rewardTokensPerShare * shareAmount);
}
function setRewardDebt(address user, uint256 newValue) external onlyOwner {
rewardDebt[user] = newValue;
}
function increaseRewardTokensPerShare(uint256 amount) external onlyOwner {
rewardTokensPerShare += amount;
}
}
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./full_match/1/0xE7B4451e568CFeCa708aD17dFE0918D0905dc811/sources/contracts/redeemers/IRedeemer.sol | For some assets, closing a portion directly to the user is not possible Or some assets only allow the claiming all rewards to the owner (you can't claim a portion of the rewards) In this case these operations have to happen first, returning those assets to the vault And then being distributed to the withdrawer during normal erc20 withdraw processing A good example of this is with GMX, where sometimes we will have to close the entire position to the vault And then distribute a portion of the proceeds downstream to the withdrawer. The function of having preWithdraw saves us the drama of having to try and ORDER asset withdraws. | interface IRedeemer is IRedeemerEvents {
function preWithdraw(
uint tokenId,
address asset,
address withdrawer,
uint portion
) external payable;
function withdraw(
uint tokenId,
address asset,
address withdrawer,
uint portion
) external payable;
function hasPreWithdraw() external view returns (bool);
import { IRedeemerEvents } from './IRedeemerEvents.sol';
}
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./full_match/44787/0x3966196588981E29e85f5EDCc31ddc8754cD5b20/sources/Users/monk/celo/clabs/contracts/common/MultiSig.sol | Public functions/ @dev Contract constructor sets initial owners and required number of confirmations. @param _owners List of initial owners. @param _required Number of required confirmations for external transactions. @param _internalRequired Number of required confirmations for internal transactions. | function initialize(address[] calldata _owners, uint256 _required, uint256 _internalRequired)
external
initializer
validRequirement(_owners.length, _required)
validRequirement(_owners.length, _internalRequired)
{
for (uint256 i = 0; i < _owners.length; i = i.add(1)) {
require(
!isOwner[_owners[i]] && _owners[i] != address(0),
"owner was null or already given owner status"
);
isOwner[_owners[i]] = true;
}
owners = _owners;
required = _required;
internalRequired = _internalRequired;
}
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pragma solidity >=0.5.0 <0.9.0;
contract Projects {
uint256 public projectCount = 0;
mapping(uint256 => Project) public project;
address public owner;
constructor() public {
owner = msg.sender;
}
modifier onlyOwner() {
// only the owner of the contract can call those methods
require(msg.sender == owner);
_;
}
function incrementCount() internal {
projectCount += 1;
}
struct Project {
uint256 id;
uint256 value; //amount of wei it pays
string name;
uint256 state; // 0 is untaken, 1 is taken, 2 is finished, 3 is validated, 4 is canceled
address payable programer; // the person working on the project
address payable client; // the one who added the project
}
event AddProject(address _client, string _name);
function addProject(string memory _name) public payable {
// amount must be al least 1000 wei (200 euro as of 5/11/2021)
require(msg.value > 1000, "The amount of wei is insufficient");
project[projectCount] = Project(
projectCount,
msg.value,
_name,
0,
address(0),
msg.sender
); // initialise the project
incrementCount(); // increment the number of projects
emit AddProject(msg.sender, _name);
}
event TakeProject(address _programmer, uint256 _id);
function takeProject(uint256 _id) public {
// method should be called when a programmer decides to work on the project given as parameter
require(project[_id].state != 1, "The project is already taken");
project[_id].programer = msg.sender;
project[_id].state = 1;
emit TakeProject(msg.sender, _id);
}
event FinishProject(uint256 _id);
function finishProject(uint256 _id) public {
// method should be called when the project is considered finished and it sets it's state to finished
require(
project[_id].programer == msg.sender,
"Only assigned programmer may finish project"
);
require(project[_id].state != 0, "The project is not taken");
require(project[_id].state != 2, "The project is already finished");
project[_id].state = 2;
emit FinishProject(_id);
}
event CancelProject(uint256 _id);
function cancelProject(uint256 _id) public onlyOwner {
require(project[_id].state != 3, "The project is validated");
require(project[_id].state != 4, "The project is cancelled");
address payable payee = project[_id].client;
uint256 payment = project[_id].value;
payee.transfer(payment);
project[_id].state = 4;
emit CancelProject(_id);
}
event ValidateProject(uint256 _id);
function validateProject(uint256 _id) public onlyOwner {
require(project[_id].state != 0, "The project is not taken");
require(project[_id].state != 1, "The project is taken");
require(project[_id].state != 3, "The project is validated");
require(project[_id].state != 4, "The project is cancelled");
address payable payee = project[_id].programer;
uint256 payment = project[_id].value;
payee.transfer(payment);
project[_id].state = 3;
emit ValidateProject(_id);
}
}
| method should be called when the project is considered finished and it sets it's state to finished | function finishProject(uint256 _id) public {
require(
project[_id].programer == msg.sender,
"Only assigned programmer may finish project"
);
require(project[_id].state != 0, "The project is not taken");
require(project[_id].state != 2, "The project is already finished");
project[_id].state = 2;
emit FinishProject(_id);
}
event CancelProject(uint256 _id);
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./partial_match/41/0x44DCDe1bEDBB42B0119c22DeF19925fa39965d4c/sources/project_/contracts/cp06/BikeChain_flat.sol | / Keeps track of balances for address that are included in receiving reward. Keeps track of balances for address that are excluded from receiving reward. Keeps track of which address are excluded from fee. Keeps track of which address are excluded from reward. An array of addresses that are excluded from reward. ERC20 Token Standard Liquidity pool provider router This Token and WETH pair contract address. Where burnt tokens are sent to. This is an address that no one can have accesses to. Decimals of taxBurn. Used for have tax less than 1%. Decimals of taxReward. Used for have tax less than 1%. Decimals of taxLiquify. Used for have tax less than 1%. Decimals of taxAdmin. Used for have tax less than 1%. This percent of a transaction will be burnt. This percent of a transaction will be redistribute to all holders. This percent of a transaction will be added to the liquidity pool. More details at https:github.com/Sheldenshi/ERC20Deflationary. This percent of a transaction will be transferred to admin wallet. ERC20 Token Standard ERC20 Token Standard Current supply:= total supply - burnt tokens A number that helps distributing fees to all holders respectively. Total amount of tokens rewarded / distributing. Total amount of tokens burnt. Total amount of tokens locked in the LP (this token and WETH pair). Total amount of ETH locked in the LP (this token and WETH pair). A threshold for swap and liquify. ERC20 Token Standard ERC20 Token Standard Whether a previous call of SwapAndLiquify process is still in process. Prevent reentrancy. | contract ExtendedReflections is Context, IERC20, Ownable {
mapping (address => uint256) private _reflectionBalances;
mapping (address => uint256) private _tokenBalances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcludedFromReward;
address[] private _excludedFromReward;
mapping (address => mapping (address => uint256)) private _allowances;
IUniswapV2Router02 internal _uniswapV2Router;
address internal _uniswapV2Pair;
address private constant burnAccount = 0x000000000000000000000000000000000000dEaD;
address public adminAddress;
Tax rate = (_taxXXX / 10**_tax_XXXDecimals) percent.
For example: if _taxBurn is 1 and _taxBurnDecimals is 2.
Tax rate = 0.01%
If you want tax rate for burn to be 5% for example,
set _taxBurn to 5 and _taxBurnDecimals to 0.
5 * (10 ** 0) = 5
uint32 private _taxBurnDecimals;
uint32 private _taxRewardDecimals;
uint32 private _taxLiquifyDecimals;
uint32 private _taxAdminDecimals;
uint32 private _taxBurn;
uint32 private _taxReward;
uint32 private _taxLiquify;
uint32 private _taxAdmin;
uint32 private _decimals;
uint256 private _totalSupply;
uint256 private _currentSupply;
uint256 private _reflectionTotal;
uint256 private _totalRewarded;
uint256 private _totalBurnt;
uint256 private _totalTokensLockedInLiquidity;
uint256 private _totalETHLockedInLiquidity;
uint256 private _minTokensBeforeSwap;
string private _name;
string private _symbol;
bool private _inSwapAndLiquify;
bool private _autoSwapAndLiquifyEnabled;
bool private _autoBurnEnabled;
bool private _rewardEnabled;
bool private _adminRewardEnabled;
modifier lockTheSwap {
require(!_inSwapAndLiquify, "Currently in swap and liquify.");
_inSwapAndLiquify = true;
_;
_inSwapAndLiquify = false;
}
struct ValuesFromAmount {
uint256 amount;
uint256 tBurnFee;
uint256 tRewardFee;
uint256 tLiquifyFee;
uint256 tAdminFee;
uint256 tTransferAmount;
uint256 rAmount;
uint256 rBurnFee;
uint256 rRewardFee;
uint256 rLiquifyFee;
uint256 rAdminFee;
uint256 rTransferAmount;
}
event TaxBurnUpdate(uint32 previousTax, uint32 previousDecimals, uint32 currentTax, uint32 currentDecimal);
event TaxRewardUpdate(uint32 previousTax, uint32 previousDecimals, uint32 currentTax, uint32 currentDecimal);
event TaxLiquifyUpdate(uint32 previousTax, uint32 previousDecimals, uint32 currentTax, uint32 currentDecimal);
event TaxAdminUpdate(uint32 previousTax, uint32 previousDecimals, uint32 currentTax, uint32 currentDecimal);
event MinTokensBeforeSwapUpdated(uint256 previous, uint256 current);
event AdminAddressUpdated(address previous, address current);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensAddedToLiquidity
);
event ExcludeAccountFromReward(address account);
event IncludeAccountInReward(address account);
event ExcludeAccountFromFee(address account);
event IncludeAccountInFee(address account);
event EnabledAutoBurn();
event EnabledReward();
event EnabledAutoSwapAndLiquify();
event EnabledAdminReward();
event DisabledAutoBurn();
event DisabledReward();
event DisabledAutoSwapAndLiquify();
event DisabledAdminReward();
event Airdrop(uint256 amount);
Events
event Burn(address from, uint256 amount);
constructor (string memory name_, string memory symbol_, uint32 decimals_, uint256 tokenSupply_) {
_name = name_;
_symbol = symbol_;
_decimals = decimals_;
_totalSupply = tokenSupply_ * (10 ** decimals_);
_currentSupply = _totalSupply;
_reflectionTotal = (~uint256(0) - (~uint256(0) % _totalSupply));
_reflectionBalances[_msgSender()] = _reflectionTotal;
excludeAccountFromFee(owner());
excludeAccountFromFee(address(this));
_excludeAccountFromReward(owner());
_excludeAccountFromReward(burnAccount);
_excludeAccountFromReward(address(this));
emit Transfer(address(0), _msgSender(), _totalSupply);
}
receive() external payable {}
function name() public view virtual returns (string memory) {
return _name;
}
function symbol() public view virtual returns (string memory) {
return _symbol;
}
function decimals() public view virtual returns (uint32) {
return _decimals;
}
function uniswapV2Pair() public view virtual returns (address) {
return _uniswapV2Pair;
}
function taxBurn() public view virtual returns (uint32) {
return _taxBurn;
}
function taxReward() public view virtual returns (uint32) {
return _taxReward;
}
function taxLiquify() public view virtual returns (uint32) {
return _taxLiquify;
}
function taxAdmin() public view virtual returns (uint32) {
return _taxAdmin;
}
function taxBurnDecimals() public view virtual returns (uint32) {
return _taxBurnDecimals;
}
function taxRewardDecimals() public view virtual returns (uint32) {
return _taxRewardDecimals;
}
function taxLiquifyDecimals() public view virtual returns (uint32) {
return _taxLiquifyDecimals;
}
function taxAdminDecimals() public view virtual returns (uint32) {
return _taxAdminDecimals;
}
function autoBurnEnabled() public view virtual returns (bool) {
return _autoBurnEnabled;
}
function rewardEnabled() public view virtual returns (bool) {
return _rewardEnabled;
}
function autoSwapAndLiquifyEnabled() public view virtual returns (bool) {
return _autoSwapAndLiquifyEnabled;
}
function adminRewardEnabled() public view virtual returns (bool) {
return _adminRewardEnabled;
}
function minTokensBeforeSwap() external view virtual returns (uint256) {
return _minTokensBeforeSwap;
}
function totalSupply() external view virtual override returns (uint256) {
return _totalSupply;
}
function currentSupply() external view virtual returns (uint256) {
return _currentSupply;
}
function totalBurnt() external view virtual returns (uint256) {
return _totalBurnt;
}
function totalTokensLockedInLiquidity() external view virtual returns (uint256) {
return _totalTokensLockedInLiquidity;
}
function totalETHLockedInLiquidity() external view virtual returns (uint256) {
return _totalETHLockedInLiquidity;
}
function balanceOf(address account) public view virtual override returns (uint256) {
if (_isExcludedFromReward[account]) return _tokenBalances[account];
return tokenFromReflection(_reflectionBalances[account]);
}
function isExcludedFromReward(address account) external view returns (bool) {
return _isExcludedFromReward[account];
}
function isExcludedFromFee(address account) external view returns (bool) {
return _isExcludedFromFee[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
require(_allowances[sender][_msgSender()] >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), _allowances[sender][_msgSender()] - amount);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
function _burn(address account, uint256 amount) internal virtual {
require(account != burnAccount, "ERC20: burn from the burn address");
uint256 accountBalance = balanceOf(account);
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
uint256 rAmount = _getRAmount(amount);
if (_isExcludedFromReward[account]) {
_tokenBalances[account] -= amount;
}
_reflectionBalances[account] -= rAmount;
_tokenBalances[burnAccount] += amount;
_reflectionBalances[burnAccount] += rAmount;
_currentSupply -= amount;
_totalBurnt += amount;
emit Burn(account, amount);
emit Transfer(account, burnAccount, amount);
}
function _burn(address account, uint256 amount) internal virtual {
require(account != burnAccount, "ERC20: burn from the burn address");
uint256 accountBalance = balanceOf(account);
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
uint256 rAmount = _getRAmount(amount);
if (_isExcludedFromReward[account]) {
_tokenBalances[account] -= amount;
}
_reflectionBalances[account] -= rAmount;
_tokenBalances[burnAccount] += amount;
_reflectionBalances[burnAccount] += rAmount;
_currentSupply -= amount;
_totalBurnt += amount;
emit Burn(account, amount);
emit Transfer(account, burnAccount, amount);
}
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
ValuesFromAmount memory values = _getValues(amount, _isExcludedFromFee[sender]);
if (_autoSwapAndLiquifyEnabled)
_beforeTokenTransfer(sender, recipient);
if (_isExcludedFromReward[sender] && !_isExcludedFromReward[recipient]) {
_transferFromExcluded(sender, recipient, values);
_transferToExcluded(sender, recipient, values);
_transferStandard(sender, recipient, values);
_transferBothExcluded(sender, recipient, values);
_transferStandard(sender, recipient, values);
}
emit Transfer(sender, recipient, values.tTransferAmount);
if (!_isExcludedFromFee[sender]) {
_afterTokenTransfer(values);
}
}
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
ValuesFromAmount memory values = _getValues(amount, _isExcludedFromFee[sender]);
if (_autoSwapAndLiquifyEnabled)
_beforeTokenTransfer(sender, recipient);
if (_isExcludedFromReward[sender] && !_isExcludedFromReward[recipient]) {
_transferFromExcluded(sender, recipient, values);
_transferToExcluded(sender, recipient, values);
_transferStandard(sender, recipient, values);
_transferBothExcluded(sender, recipient, values);
_transferStandard(sender, recipient, values);
}
emit Transfer(sender, recipient, values.tTransferAmount);
if (!_isExcludedFromFee[sender]) {
_afterTokenTransfer(values);
}
}
} else if (!_isExcludedFromReward[sender] && _isExcludedFromReward[recipient]) {
} else if (!_isExcludedFromReward[sender] && !_isExcludedFromReward[recipient]) {
} else if (_isExcludedFromReward[sender] && _isExcludedFromReward[recipient]) {
} else {
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
ValuesFromAmount memory values = _getValues(amount, _isExcludedFromFee[sender]);
if (_autoSwapAndLiquifyEnabled)
_beforeTokenTransfer(sender, recipient);
if (_isExcludedFromReward[sender] && !_isExcludedFromReward[recipient]) {
_transferFromExcluded(sender, recipient, values);
_transferToExcluded(sender, recipient, values);
_transferStandard(sender, recipient, values);
_transferBothExcluded(sender, recipient, values);
_transferStandard(sender, recipient, values);
}
emit Transfer(sender, recipient, values.tTransferAmount);
if (!_isExcludedFromFee[sender]) {
_afterTokenTransfer(values);
}
}
function _beforeTokenTransfer(address sender, address recipient) internal virtual {
uint256 contractBalance = _tokenBalances[address(this)];
bool overMinTokensBeforeSwap = contractBalance >= _minTokensBeforeSwap;
if (overMinTokensBeforeSwap &&
!_inSwapAndLiquify &&
_msgSender() != _uniswapV2Pair &&
sender != owner() &&
recipient != owner()
)
{
swapAndLiquify(contractBalance);
}
}
function _beforeTokenTransfer(address sender, address recipient) internal virtual {
uint256 contractBalance = _tokenBalances[address(this)];
bool overMinTokensBeforeSwap = contractBalance >= _minTokensBeforeSwap;
if (overMinTokensBeforeSwap &&
!_inSwapAndLiquify &&
_msgSender() != _uniswapV2Pair &&
sender != owner() &&
recipient != owner()
)
{
swapAndLiquify(contractBalance);
}
}
function _afterTokenTransfer(ValuesFromAmount memory values) internal virtual {
if (_autoBurnEnabled) {
_tokenBalances[address(this)] += values.tBurnFee;
_reflectionBalances[address(this)] += values.rBurnFee;
_approve(address(this), _msgSender(), values.tBurnFee);
burnFrom(address(this), values.tBurnFee);
}
if (_adminRewardEnabled) {
sendFeeToAddress(adminAddress, values.rAdminFee, values.tAdminFee);
}
if (_rewardEnabled) {
_distributeFee(values.rRewardFee, values.tRewardFee);
}
if (_autoSwapAndLiquifyEnabled) {
_tokenBalances[address(this)] += values.tLiquifyFee;
_reflectionBalances[address(this)] += values.rLiquifyFee;
}
}
function _afterTokenTransfer(ValuesFromAmount memory values) internal virtual {
if (_autoBurnEnabled) {
_tokenBalances[address(this)] += values.tBurnFee;
_reflectionBalances[address(this)] += values.rBurnFee;
_approve(address(this), _msgSender(), values.tBurnFee);
burnFrom(address(this), values.tBurnFee);
}
if (_adminRewardEnabled) {
sendFeeToAddress(adminAddress, values.rAdminFee, values.tAdminFee);
}
if (_rewardEnabled) {
_distributeFee(values.rRewardFee, values.tRewardFee);
}
if (_autoSwapAndLiquifyEnabled) {
_tokenBalances[address(this)] += values.tLiquifyFee;
_reflectionBalances[address(this)] += values.rLiquifyFee;
}
}
function _afterTokenTransfer(ValuesFromAmount memory values) internal virtual {
if (_autoBurnEnabled) {
_tokenBalances[address(this)] += values.tBurnFee;
_reflectionBalances[address(this)] += values.rBurnFee;
_approve(address(this), _msgSender(), values.tBurnFee);
burnFrom(address(this), values.tBurnFee);
}
if (_adminRewardEnabled) {
sendFeeToAddress(adminAddress, values.rAdminFee, values.tAdminFee);
}
if (_rewardEnabled) {
_distributeFee(values.rRewardFee, values.tRewardFee);
}
if (_autoSwapAndLiquifyEnabled) {
_tokenBalances[address(this)] += values.tLiquifyFee;
_reflectionBalances[address(this)] += values.rLiquifyFee;
}
}
function _afterTokenTransfer(ValuesFromAmount memory values) internal virtual {
if (_autoBurnEnabled) {
_tokenBalances[address(this)] += values.tBurnFee;
_reflectionBalances[address(this)] += values.rBurnFee;
_approve(address(this), _msgSender(), values.tBurnFee);
burnFrom(address(this), values.tBurnFee);
}
if (_adminRewardEnabled) {
sendFeeToAddress(adminAddress, values.rAdminFee, values.tAdminFee);
}
if (_rewardEnabled) {
_distributeFee(values.rRewardFee, values.tRewardFee);
}
if (_autoSwapAndLiquifyEnabled) {
_tokenBalances[address(this)] += values.tLiquifyFee;
_reflectionBalances[address(this)] += values.rLiquifyFee;
}
}
function _afterTokenTransfer(ValuesFromAmount memory values) internal virtual {
if (_autoBurnEnabled) {
_tokenBalances[address(this)] += values.tBurnFee;
_reflectionBalances[address(this)] += values.rBurnFee;
_approve(address(this), _msgSender(), values.tBurnFee);
burnFrom(address(this), values.tBurnFee);
}
if (_adminRewardEnabled) {
sendFeeToAddress(adminAddress, values.rAdminFee, values.tAdminFee);
}
if (_rewardEnabled) {
_distributeFee(values.rRewardFee, values.tRewardFee);
}
if (_autoSwapAndLiquifyEnabled) {
_tokenBalances[address(this)] += values.tLiquifyFee;
_reflectionBalances[address(this)] += values.rLiquifyFee;
}
}
function _transferStandard(address sender, address recipient, ValuesFromAmount memory values) private {
_reflectionBalances[sender] = _reflectionBalances[sender] - values.rAmount;
_reflectionBalances[recipient] = _reflectionBalances[recipient] + values.rTransferAmount;
}
function _transferToExcluded(address sender, address recipient, ValuesFromAmount memory values) private {
_reflectionBalances[sender] = _reflectionBalances[sender] - values.rAmount;
_tokenBalances[recipient] = _tokenBalances[recipient] + values.tTransferAmount;
_reflectionBalances[recipient] = _reflectionBalances[recipient] + values.rTransferAmount;
}
function _transferFromExcluded(address sender, address recipient, ValuesFromAmount memory values) private {
_tokenBalances[sender] = _tokenBalances[sender] - values.amount;
_reflectionBalances[sender] = _reflectionBalances[sender] - values.rAmount;
_reflectionBalances[recipient] = _reflectionBalances[recipient] + values.rTransferAmount;
}
function _transferBothExcluded(address sender, address recipient, ValuesFromAmount memory values) private {
_tokenBalances[sender] = _tokenBalances[sender] - values.amount;
_reflectionBalances[sender] = _reflectionBalances[sender] - values.rAmount;
_tokenBalances[recipient] = _tokenBalances[recipient] + values.tTransferAmount;
_reflectionBalances[recipient] = _reflectionBalances[recipient] + values.rTransferAmount;
}
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
function burnFrom(address account, uint256 amount) public virtual {
uint256 currentAllowance = allowance(account, _msgSender());
require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance");
_approve(account, _msgSender(), currentAllowance - amount);
_burn(account, amount);
}
function _excludeAccountFromReward(address account) internal {
if(_reflectionBalances[account] > 0) {
_tokenBalances[account] = tokenFromReflection(_reflectionBalances[account]);
}
_isExcludedFromReward[account] = true;
_excludedFromReward.push(account);
emit ExcludeAccountFromReward(account);
}
function _excludeAccountFromReward(address account) internal {
if(_reflectionBalances[account] > 0) {
_tokenBalances[account] = tokenFromReflection(_reflectionBalances[account]);
}
_isExcludedFromReward[account] = true;
_excludedFromReward.push(account);
emit ExcludeAccountFromReward(account);
}
function includeAccountInReward(address account) public onlyOwner {
require(_isExcludedFromReward[account], "Account is already included.");
for (uint256 i = 0; i < _excludedFromReward.length; i++) {
if (_excludedFromReward[i] == account) {
_excludedFromReward[i] = _excludedFromReward[_excludedFromReward.length - 1];
_tokenBalances[account] = 0;
_isExcludedFromReward[account] = false;
_excludedFromReward.pop();
break;
}
}
emit IncludeAccountInReward(account);
}
function includeAccountInReward(address account) public onlyOwner {
require(_isExcludedFromReward[account], "Account is already included.");
for (uint256 i = 0; i < _excludedFromReward.length; i++) {
if (_excludedFromReward[i] == account) {
_excludedFromReward[i] = _excludedFromReward[_excludedFromReward.length - 1];
_tokenBalances[account] = 0;
_isExcludedFromReward[account] = false;
_excludedFromReward.pop();
break;
}
}
emit IncludeAccountInReward(account);
}
function includeAccountInReward(address account) public onlyOwner {
require(_isExcludedFromReward[account], "Account is already included.");
for (uint256 i = 0; i < _excludedFromReward.length; i++) {
if (_excludedFromReward[i] == account) {
_excludedFromReward[i] = _excludedFromReward[_excludedFromReward.length - 1];
_tokenBalances[account] = 0;
_isExcludedFromReward[account] = false;
_excludedFromReward.pop();
break;
}
}
emit IncludeAccountInReward(account);
}
function excludeAccountFromFee(address account) internal {
_isExcludedFromFee[account] = true;
emit ExcludeAccountFromFee(account);
}
function includeAccountInFee(address account) public onlyOwner {
require(_isExcludedFromFee[account], "Account is already included.");
_isExcludedFromFee[account] = false;
emit IncludeAccountInFee(account);
}
function airdrop(uint256 amount) public {
address sender = _msgSender();
require(balanceOf(sender) >= amount, "The caller must have balance >= amount.");
ValuesFromAmount memory values = _getValues(amount, false);
if (_isExcludedFromReward[sender]) {
_tokenBalances[sender] -= values.amount;
}
_reflectionBalances[sender] -= values.rAmount;
_reflectionTotal = _reflectionTotal - values.rAmount;
_totalRewarded += amount;
emit Airdrop(amount);
}
function airdrop(uint256 amount) public {
address sender = _msgSender();
require(balanceOf(sender) >= amount, "The caller must have balance >= amount.");
ValuesFromAmount memory values = _getValues(amount, false);
if (_isExcludedFromReward[sender]) {
_tokenBalances[sender] -= values.amount;
}
_reflectionBalances[sender] -= values.rAmount;
_reflectionTotal = _reflectionTotal - values.rAmount;
_totalRewarded += amount;
emit Airdrop(amount);
}
function reflectionFromToken(uint256 amount, bool deductTransferFee) internal view returns(uint256) {
require(amount <= _totalSupply, "Amount must be less than supply");
ValuesFromAmount memory values = _getValues(amount, deductTransferFee);
return values.rTransferAmount;
}
function tokenFromReflection(uint256 rAmount) internal view returns(uint256) {
require(rAmount <= _reflectionTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount / currentRate;
}
function swapAndLiquify(uint256 contractBalance) private lockTheSwap {
uint256 tokensToSwap = contractBalance / 2;
uint256 tokensAddToLiquidity = contractBalance - tokensToSwap;
uint256 initialBalance = address(this).balance;
swapTokensForEth(tokensToSwap);
uint256 ethAddToLiquify = address(this).balance - initialBalance;
addLiquidity(ethAddToLiquify, tokensAddToLiquidity);
_totalETHLockedInLiquidity += address(this).balance - initialBalance;
_totalTokensLockedInLiquidity += contractBalance - balanceOf(address(this));
emit SwapAndLiquify(tokensToSwap, ethAddToLiquify, tokensAddToLiquidity);
}
function swapTokensForEth(uint256 amount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _uniswapV2Router.WETH();
_approve(address(this), address(_uniswapV2Router), amount);
_uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
amount,
0,
path,
block.timestamp + 60 * 1000
);
}
function addLiquidity(uint256 ethAmount, uint256 tokenAmount) private {
_approve(address(this), address(_uniswapV2Router), tokenAmount);
address(this),
tokenAmount,
block.timestamp + 60 * 1000
);
}
_uniswapV2Router.addLiquidityETH{value: ethAmount}(
function _distributeFee(uint256 rRewardFee, uint256 tRewardFee) private {
_reflectionTotal = _reflectionTotal - rRewardFee;
_totalRewarded += tRewardFee;
}
function _getValues(uint256 amount, bool deductTransferFee) private view returns (ValuesFromAmount memory) {
ValuesFromAmount memory values;
values.amount = amount;
_getTValues(values, deductTransferFee);
_getRValues(values, deductTransferFee);
return values;
}
function _getTValues(ValuesFromAmount memory values, bool deductTransferFee) view private {
if (deductTransferFee) {
values.tTransferAmount = values.amount;
values.tBurnFee = _calculateTax(values.amount, _taxBurn, _taxBurnDecimals);
values.tRewardFee = _calculateTax(values.amount, _taxReward, _taxRewardDecimals);
values.tLiquifyFee = _calculateTax(values.amount, _taxLiquify, _taxLiquifyDecimals);
values.tAdminFee = _calculateTax(values.amount, _taxAdmin, _taxAdminDecimals);
values.tTransferAmount = values.amount - values.tBurnFee - values.tRewardFee - values.tLiquifyFee - values.tAdminFee;
}
}
function _getTValues(ValuesFromAmount memory values, bool deductTransferFee) view private {
if (deductTransferFee) {
values.tTransferAmount = values.amount;
values.tBurnFee = _calculateTax(values.amount, _taxBurn, _taxBurnDecimals);
values.tRewardFee = _calculateTax(values.amount, _taxReward, _taxRewardDecimals);
values.tLiquifyFee = _calculateTax(values.amount, _taxLiquify, _taxLiquifyDecimals);
values.tAdminFee = _calculateTax(values.amount, _taxAdmin, _taxAdminDecimals);
values.tTransferAmount = values.amount - values.tBurnFee - values.tRewardFee - values.tLiquifyFee - values.tAdminFee;
}
}
} else {
function _getRValues(ValuesFromAmount memory values, bool deductTransferFee) view private {
uint256 currentRate = _getRate();
values.rAmount = values.amount * currentRate;
if (deductTransferFee) {
values.rTransferAmount = values.rAmount;
values.rAmount = values.amount * currentRate;
values.rBurnFee = values.tBurnFee * currentRate;
values.rRewardFee = values.tRewardFee * currentRate;
values.rLiquifyFee = values.tLiquifyFee * currentRate;
values.rAdminFee = values.tAdminFee * currentRate;
values.rTransferAmount = values.rAmount - values.rBurnFee - values.rRewardFee - values.rLiquifyFee - values.rAdminFee;
}
}
function _getRValues(ValuesFromAmount memory values, bool deductTransferFee) view private {
uint256 currentRate = _getRate();
values.rAmount = values.amount * currentRate;
if (deductTransferFee) {
values.rTransferAmount = values.rAmount;
values.rAmount = values.amount * currentRate;
values.rBurnFee = values.tBurnFee * currentRate;
values.rRewardFee = values.tRewardFee * currentRate;
values.rLiquifyFee = values.tLiquifyFee * currentRate;
values.rAdminFee = values.tAdminFee * currentRate;
values.rTransferAmount = values.rAmount - values.rBurnFee - values.rRewardFee - values.rLiquifyFee - values.rAdminFee;
}
}
} else {
function _getRAmount(uint256 amount) private view returns (uint256) {
uint256 currentRate = _getRate();
return amount * currentRate;
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply / tSupply;
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _reflectionTotal;
uint256 tSupply = _totalSupply;
for (uint256 i = 0; i < _excludedFromReward.length; i++) {
if (_reflectionBalances[_excludedFromReward[i]] > rSupply || _tokenBalances[_excludedFromReward[i]] > tSupply) return (_reflectionTotal, _totalSupply);
rSupply = rSupply - _reflectionBalances[_excludedFromReward[i]];
tSupply = tSupply - _tokenBalances[_excludedFromReward[i]];
}
if (rSupply < _reflectionTotal / _totalSupply) return (_reflectionTotal, _totalSupply);
return (rSupply, tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _reflectionTotal;
uint256 tSupply = _totalSupply;
for (uint256 i = 0; i < _excludedFromReward.length; i++) {
if (_reflectionBalances[_excludedFromReward[i]] > rSupply || _tokenBalances[_excludedFromReward[i]] > tSupply) return (_reflectionTotal, _totalSupply);
rSupply = rSupply - _reflectionBalances[_excludedFromReward[i]];
tSupply = tSupply - _tokenBalances[_excludedFromReward[i]];
}
if (rSupply < _reflectionTotal / _totalSupply) return (_reflectionTotal, _totalSupply);
return (rSupply, tSupply);
}
function _calculateTax(uint256 amount, uint32 tax, uint32 taxDecimals_) private pure returns (uint256) {
return amount * tax / (10 ** taxDecimals_) / (10 ** 2);
}
Owner functions
function enableAutoBurn(uint32 taxBurn_, uint32 taxBurnDecimals_) public onlyOwner {
require(!_autoBurnEnabled, "Auto burn feature is already enabled.");
require(taxBurn_ > 0, "Tax must be greater than 0.");
require(taxBurnDecimals_ + 2 <= decimals(), "Tax decimals must be less than token decimals - 2");
_autoBurnEnabled = true;
setTaxBurn(taxBurn_, taxBurnDecimals_);
emit EnabledAutoBurn();
}
function enableReward(uint32 taxReward_, uint32 taxRewardDecimals_) public onlyOwner {
require(!_rewardEnabled, "Reward feature is already enabled.");
require(taxReward_ > 0, "Tax must be greater than 0.");
require(taxRewardDecimals_ + 2 <= decimals(), "Tax decimals must be less than token decimals - 2");
_rewardEnabled = true;
setTaxReward(taxReward_, taxRewardDecimals_);
emit EnabledReward();
}
function enableAutoSwapAndLiquify(uint32 taxLiquify_, uint32 taxLiquifyDecimals_, address routerAddress, uint256 minTokensBeforeSwap_) public onlyOwner {
require(!_autoSwapAndLiquifyEnabled, "Auto swap and liquify feature is already enabled.");
require(taxLiquify_ > 0, "Tax must be greater than 0.");
require(taxLiquifyDecimals_ + 2 <= decimals(), "Tax decimals must be less than token decimals - 2");
_minTokensBeforeSwap = minTokensBeforeSwap_;
IUniswapV2Router02 uniswapV2Router = IUniswapV2Router02(routerAddress);
_uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).getPair(address(this), uniswapV2Router.WETH());
if (_uniswapV2Pair == address(0)) {
_uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory())
.createPair(address(this), uniswapV2Router.WETH());
}
_uniswapV2Router = uniswapV2Router;
setTaxLiquify(taxLiquify_, taxLiquifyDecimals_);
emit EnabledAutoSwapAndLiquify();
}
function enableAutoSwapAndLiquify(uint32 taxLiquify_, uint32 taxLiquifyDecimals_, address routerAddress, uint256 minTokensBeforeSwap_) public onlyOwner {
require(!_autoSwapAndLiquifyEnabled, "Auto swap and liquify feature is already enabled.");
require(taxLiquify_ > 0, "Tax must be greater than 0.");
require(taxLiquifyDecimals_ + 2 <= decimals(), "Tax decimals must be less than token decimals - 2");
_minTokensBeforeSwap = minTokensBeforeSwap_;
IUniswapV2Router02 uniswapV2Router = IUniswapV2Router02(routerAddress);
_uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).getPair(address(this), uniswapV2Router.WETH());
if (_uniswapV2Pair == address(0)) {
_uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory())
.createPair(address(this), uniswapV2Router.WETH());
}
_uniswapV2Router = uniswapV2Router;
setTaxLiquify(taxLiquify_, taxLiquifyDecimals_);
emit EnabledAutoSwapAndLiquify();
}
_excludeAccountFromReward(address(uniswapV2Router));
_excludeAccountFromReward(_uniswapV2Pair);
excludeAccountFromFee(address(uniswapV2Router));
excludeAccountFromFee(_uniswapV2Pair);
_autoSwapAndLiquifyEnabled = true;
function enableAdminTax(uint32 taxAdmin_, uint32 taxAdminDecimals_, address adminAddress_) public onlyOwner {
require(!_adminRewardEnabled, "Admin tax feature is already enabled.");
require(taxAdmin_ > 0, "Tax must be greater than 0.");
require(taxAdminDecimals_ + 2 <= decimals(), "Tax decimals must be less than token decimals - 2");
_adminRewardEnabled = true;
setAdminTax(taxAdmin_, taxAdminDecimals_);
setAdminAddress(adminAddress_);
emit EnabledAdminReward();
}
function disableAutoBurn() public onlyOwner {
require(_autoBurnEnabled, "Auto burn feature is already disabled.");
setTaxBurn(0, 0);
_autoBurnEnabled = false;
emit DisabledAutoBurn();
}
function disableReward() public onlyOwner {
require(_rewardEnabled, "Reward feature is already disabled.");
setTaxReward(0, 0);
_rewardEnabled = false;
emit DisabledReward();
}
function disableAutoSwapAndLiquify() public onlyOwner {
require(_autoSwapAndLiquifyEnabled, "Auto swap and liquify feature is already disabled.");
setTaxLiquify(0, 0);
_autoSwapAndLiquifyEnabled = false;
emit DisabledAutoSwapAndLiquify();
}
function disableAdminTax() public onlyOwner {
require(_adminRewardEnabled, "Admin reward feature is already disabled.");
setAdminTax(0, 0);
_adminRewardEnabled = false;
emit DisabledAdminReward();
}
function setMinTokensBeforeSwap(uint256 minTokensBeforeSwap_) public onlyOwner {
require(minTokensBeforeSwap_ < _currentSupply, "minTokensBeforeSwap must be lower than current supply.");
uint256 previous = _minTokensBeforeSwap;
_minTokensBeforeSwap = minTokensBeforeSwap_;
emit MinTokensBeforeSwapUpdated(previous, _minTokensBeforeSwap);
}
function setTaxBurn(uint32 taxBurn_, uint32 taxBurnDecimals_) public onlyOwner {
require(_autoBurnEnabled, "Auto burn feature must be enabled. Try the EnableAutoBurn function.");
uint32 previousTax = _taxBurn;
uint32 previousDecimals = _taxBurnDecimals;
_taxBurn = taxBurn_;
_taxBurnDecimals = taxBurnDecimals_;
emit TaxBurnUpdate(previousTax, previousDecimals, taxBurn_, taxBurnDecimals_);
}
function setTaxReward(uint32 taxReward_, uint32 taxRewardDecimals_) public onlyOwner {
require(_rewardEnabled, "Reward feature must be enabled. Try the EnableReward function.");
uint32 previousTax = _taxReward;
uint32 previousDecimals = _taxRewardDecimals;
_taxReward = taxReward_;
_taxRewardDecimals = taxRewardDecimals_;
emit TaxRewardUpdate(previousTax, previousDecimals, taxReward_, taxRewardDecimals_);
}
function setTaxLiquify(uint32 taxLiquify_, uint32 taxLiquifyDecimals_) public onlyOwner {
require(_autoSwapAndLiquifyEnabled, "Auto swap and liquify feature must be enabled. Try the EnableAutoSwapAndLiquify function.");
uint32 previousTax = _taxLiquify;
uint32 previousDecimals = _taxLiquifyDecimals;
_taxLiquify = taxLiquify_;
_taxLiquifyDecimals = taxLiquifyDecimals_;
emit TaxLiquifyUpdate(previousTax, previousDecimals, taxLiquify_, taxLiquifyDecimals_);
}
function setAdminTax(uint32 taxAdmin_, uint32 taxAdminDecimals_) public onlyOwner {
require(_adminRewardEnabled, "Admin reward feature must be enabled. Try the enableAdminTax function.");
uint32 previousTax = _taxAdmin;
uint32 previousDecimals = _taxAdminDecimals;
_taxAdmin = taxAdmin_;
_taxAdminDecimals = taxAdminDecimals_;
emit TaxAdminUpdate(previousTax, previousDecimals, taxAdmin_, taxAdminDecimals_);
}
function setAdminAddress(address adminAddress_) public onlyOwner {
require(adminAddress != adminAddress_, "New admin address must be different than old one.");
address previous = adminAddress;
adminAddress = adminAddress_;
emit AdminAddressUpdated(previous, adminAddress_);
}
function sendFeeToAddress(address _addr, uint256 _rAmount, uint256 _tAmount) private {
if (_isExcludedFromReward[_addr])
_tokenBalances[_addr] += _tAmount;
_reflectionBalances[_addr] += _rAmount;
}
}
| 3,504,158 | [
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2
] |
pragma solidity 0.7.3;
import "./IdleFinanceStrategy.sol";
/**
* Adds the mainnet addresses to the PickleStrategy3Pool
*/
contract IdleStrategyDAIMainnet is IdleFinanceStrategy {
// token addresses
address constant public __weth = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
address constant public __dai = address(0x6B175474E89094C44Da98b954EedeAC495271d0F);
address constant public __uniswap = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address constant public __idleUnderlying= address(0x3fE7940616e5Bc47b0775a0dccf6237893353bB4);
address constant public __comp = address(0xc00e94Cb662C3520282E6f5717214004A7f26888);
address constant public __idle = address(0x875773784Af8135eA0ef43b5a374AaD105c5D39e);
constructor(
address _storage,
address _vault
)
IdleFinanceStrategy(
_storage,
__dai,
__idleUnderlying,
_vault,
__comp,
__idle,
__weth,
__uniswap
)
public {
}
}
pragma solidity 0.7.3;
import "@openzeppelin/contracts/math/Math.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "../../interface/IStrategy.sol";
import "../../interface/IVault.sol";
import "../../interface/IStorage.sol";
import "../../interface/uniswap/IUniswapV2Router02.sol";
import "./interface/IdleToken.sol";
import "./interface/IIdleTokenHelper.sol";
import "../../ControllableInit.sol";
contract IdleFinanceStrategy is ControllableInit {
using SafeMath for uint256;
using SafeERC20 for IERC20;
event ProfitsNotCollected(address);
event Liquidating(address, uint256);
address public referral;
IERC20 public underlying;
address public idleUnderlying;
uint256 public virtualPrice;
IIdleTokenHelper public idleTokenHelper;
address public mainUnderlying;
address public vault;
address public storageAddress;
address public comp;
address public idle;
address[] public uniswapComp;
address[] public uniswapIdle;
address public uniswapRouterV2;
bool public sellComp;
bool public sellIdle;
bool public claimAllowed;
bool public protected;
mapping (address => bool) public unsalvagableTokens;
address[] public path;
modifier restricted() {
require(msg.sender == vault || msg.sender == address(controller()) || msg.sender == address(governance()),
"The sender has to be the controller or vault or governance");
_;
}
modifier updateVirtualPrice() {
if (protected) {
require(virtualPrice <= idleTokenHelper.getRedeemPrice(idleUnderlying), "virtual price is higher than needed");
}
_;
virtualPrice = idleTokenHelper.getRedeemPrice(idleUnderlying);
}
constructor(
address _storage,
address _underlying,
address _idleUnderlying,
address _vault,
address _comp,
address _idle,
address _weth,
address _uniswap
) public {
comp = _comp;
idle = _idle;
underlying = IERC20(_underlying);
idleUnderlying = _idleUnderlying;
vault = _vault;
storageAddress = _storage;
uniswapRouterV2 = _uniswap;
protected = true;
ControllableInit.initialize(_storage);
// set these tokens to be not salvagable
unsalvagableTokens[_underlying] = true;
unsalvagableTokens[_idleUnderlying] = true;
unsalvagableTokens[_comp] = true;
unsalvagableTokens[_idle] = true;
uniswapComp = [_comp, _weth, _idle];
uniswapIdle = [_idle, _weth, _underlying];
referral = address(0xf00dD244228F51547f0563e60bCa65a30FBF5f7f);
sellComp = true;
sellIdle = true;
claimAllowed = true;
idleTokenHelper = IIdleTokenHelper(0x04Ce60ed10F6D2CfF3AA015fc7b950D13c113be5);
virtualPrice = idleTokenHelper.getRedeemPrice(idleUnderlying);
mainUnderlying = IStorage(_storage).mainUnderlying();
}
function depositArbCheck() public view returns(bool) {
return true;
}
function setReferral(address _newRef) public onlyGovernance {
referral = _newRef;
}
function swapAllMainUnderlyingToUnderlying() public restricted {
uint256 _mainUnderlyingBalance = IERC20(mainUnderlying).balanceOf(address(this));
IERC20(mainUnderlying).safeApprove(uniswapRouterV2, 0);
IERC20(mainUnderlying).safeApprove(uniswapRouterV2, _mainUnderlyingBalance);
path = [mainUnderlying, address(underlying)];
if (mainUnderlying != address(underlying)) {
IUniswapV2Router02(uniswapRouterV2).swapExactTokensForTokens(
_mainUnderlyingBalance,
0,
path,
address(this),
block.timestamp.add(60)
);
}
}
function swapAllUnderlyingToMainUnderlying() public restricted {
uint256 _underlyingBalance = IERC20(underlying).balanceOf(address(this));
IERC20(underlying).safeApprove(uniswapRouterV2, 0);
IERC20(underlying).safeApprove(uniswapRouterV2, _underlyingBalance);
path = [address(underlying), mainUnderlying];
if (mainUnderlying != address(underlying)) {
IUniswapV2Router02(uniswapRouterV2).swapExactTokensForTokens(
_underlyingBalance,
0,
path,
address(this),
block.timestamp.add(60)
);
}
}
function swapUnderlyingToMainUnderlying(uint256 amount) public restricted returns (uint256) {
uint256 _underlyingBalance = IERC20(underlying).balanceOf(address(this));
if (amount > _underlyingBalance) {
amount = _underlyingBalance;
}
IERC20(underlying).safeApprove(uniswapRouterV2, 0);
IERC20(underlying).safeApprove(uniswapRouterV2, amount);
path = [address(underlying), mainUnderlying];
uint256[] memory amounts;
if (mainUnderlying != address(underlying)) {
amounts = IUniswapV2Router02(uniswapRouterV2).swapExactTokensForTokens(
amount,
0,
path,
address(this),
block.timestamp.add(60)
);
return amounts[1];
}
return amount;
}
/**
* The strategy invests by supplying the underlying token into IDLE.
*/
function investAllUnderlying() public restricted updateVirtualPrice {
uint256 balance = underlying.balanceOf(address(this));
swapAllMainUnderlyingToUnderlying();
underlying.safeApprove(address(idleUnderlying), 0);
underlying.safeApprove(address(idleUnderlying), balance);
IIdleTokenV3_1(idleUnderlying).mintIdleToken(balance, true, referral);
}
/**
* Exits IDLE and transfers everything to the vault.
*/
function withdrawAllToVault() external restricted updateVirtualPrice {
withdrawAll();
swapAllUnderlyingToMainUnderlying();
IERC20(mainUnderlying).safeTransfer(vault, IERC20(mainUnderlying).balanceOf(address(this)));
}
/**
* Withdraws all from IDLE
*/
function withdrawAll() internal {
uint256 balance = IERC20(idleUnderlying).balanceOf(address(this));
// this automatically claims the crops
IIdleTokenV3_1(idleUnderlying).redeemIdleToken(balance);
liquidateComp();
liquidateIdle();
}
function withdrawToVault(uint256 amountUnderlying) public restricted {
// this method is called when the vault is missing funds
// we will calculate the proportion of idle LP tokens that matches
// the underlying amount requested
uint256 balanceBefore = underlying.balanceOf(address(this));
uint256 totalIdleLpTokens = IERC20(idleUnderlying).balanceOf(address(this));
uint256 totalUnderlyingBalance = totalIdleLpTokens.mul(virtualPrice).div(1e18);
uint256 ratio = amountUnderlying.mul(1e18).div(totalUnderlyingBalance);
uint256 toRedeem = totalIdleLpTokens.mul(ratio).div(1e18);
IIdleTokenV3_1(idleUnderlying).redeemIdleToken(toRedeem);
uint256 balanceAfter = underlying.balanceOf(address(this));
uint256 balanceToWithdraw = balanceAfter.sub(balanceBefore);
swapUnderlyingToMainUnderlying(balanceToWithdraw);
IERC20(mainUnderlying).safeTransfer(vault, balanceAfter.sub(balanceBefore));
}
/**
* Withdraws all assets, liquidates COMP, and invests again in the required ratio.
*/
function doHardWork() public restricted updateVirtualPrice {
if (claimAllowed) {
claim();
}
liquidateComp();
liquidateIdle();
// this updates the virtual price
investAllUnderlying();
// state of supply/loan will be updated by the modifier
}
/**
* Salvages a token.
*/
function salvage(address recipient, address token, uint256 amount) public onlyGovernance {
// To make sure that governance cannot come in and take away the coins
require(!unsalvagableTokens[token], "token is defined as not salvagable");
IERC20(token).safeTransfer(recipient, amount);
}
function claim() internal {
IIdleTokenV3_1(idleUnderlying).redeemIdleToken(0);
}
function liquidateComp() internal {
if (!sellComp) {
// Profits can be disabled for possible simplified and rapid exit
emit ProfitsNotCollected(comp);
return;
}
// no profit notification, comp is liquidated to IDLE and will be notified there
uint256 compBalance = IERC20(comp).balanceOf(address(this));
if (compBalance > 0) {
emit Liquidating(address(comp), compBalance);
IERC20(comp).safeApprove(uniswapRouterV2, 0);
IERC20(comp).safeApprove(uniswapRouterV2, compBalance);
// we can accept 1 as the minimum because this will be called only by a trusted worker
IUniswapV2Router02(uniswapRouterV2).swapExactTokensForTokens(
compBalance, 1, uniswapComp, address(this), block.timestamp
);
}
}
function liquidateIdle() internal {
if (!sellIdle) {
// Profits can be disabled for possible simplified and rapid exit
emit ProfitsNotCollected(idle);
return;
}
uint256 rewardBalance = IERC20(idle).balanceOf(address(this));
uint256 idleBalance = IERC20(idle).balanceOf(address(this));
if (idleBalance > 0) {
emit Liquidating(address(idle), idleBalance);
IERC20(idle).safeApprove(uniswapRouterV2, 0);
IERC20(idle).safeApprove(uniswapRouterV2, idleBalance);
// we can accept 1 as the minimum because this will be called only by a trusted worker
IUniswapV2Router02(uniswapRouterV2).swapExactTokensForTokens(
idleBalance, 1, uniswapIdle, address(this), block.timestamp
);
}
}
/**
* Returns the current balance. Ignores COMP that was not liquidated and invested.
*/
function investedUnderlyingBalance() public view returns (uint256) {
// NOTE: The use of virtual price is okay for appreciating assets inside IDLE,
// but would be wrong and exploitable if funds were lost by IDLE, indicated by
// the virtualPrice being greater than the token price.
if (protected) {
require(virtualPrice <= idleTokenHelper.getRedeemPrice(idleUnderlying), "virtual price is higher than needed");
}
uint256 invested = IERC20(idleUnderlying).balanceOf(address(this)).mul(virtualPrice).div(1e18);
return invested.add(IERC20(underlying).balanceOf(address(this))).add(IERC20(mainUnderlying).balanceOf(address(this)));
}
function setLiquidation(bool _sellComp, bool _sellIdle, bool _claimAllowed) public onlyGovernance {
sellComp = _sellComp;
sellIdle = _sellIdle;
claimAllowed = _claimAllowed;
}
function setProtected(bool _protected) public onlyGovernance {
protected = _protected;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
pragma solidity 0.7.3;
interface IStrategy {
function unsalvagableTokens(address tokens) external view returns (bool);
function underlying() external view returns (address);
function vault() external view returns (address);
function withdrawAllToVault() external;
function withdrawToVault(uint256 amount) external;
function investedUnderlyingBalance() external view returns (uint256); // itsNotMuch()
// should only be called by controller
function salvage(address recipient, address token, uint256 amount) external;
function doHardWork() external;
function harvest(uint256 _denom, address sender) external;
function depositArbCheck() external view returns(bool);
}
//SPDX-License-Identifier: Unlicense
pragma solidity 0.7.3;
interface IVault {
function underlyingBalanceInVault() external view returns (uint256);
function underlyingBalanceWithInvestment() external view returns (uint256);
// function store() external view returns (address);
function underlying() external view returns (address);
function strategy() external view returns (address);
function setStrategy(address _strategy) external;
function deposit(uint256 amountWei, address token) external;
function depositFor(uint256 amountWei, address token, address holder) external;
function withdrawAll() external;
function withdraw(uint256 numberOfShares, address token) external;
function underlyingBalanceWithInvestmentForHolder(address holder) view external returns (uint256);
function getPricePerFullShare() external view returns (uint256);
function doHardWork() external;
}
pragma solidity 0.7.3;
interface IStorage {
function underlyings(uint256) external view returns (address);
function routerAddress() external view returns (address);
function mainUnderlying() external view returns (address);
function underlyingEnabled(address) external view returns (bool);
function mainUnderlyingRoutes(address) external view returns (address[] memory);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;
import './IUniswapV2Router01.sol';
interface IUniswapV2Router02 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
/**
* @title: Idle Token interface
* @author: Idle Labs Inc., idle.finance
*/
pragma solidity 0.7.3;
interface IIdleTokenV3_1 {
function tokenPrice() external view returns (uint256 price);
function token() external view returns (address);
function getAPRs() external view returns (address[] memory addresses, uint256[] memory aprs);
function mintIdleToken(uint256 _amount, bool _skipRebalance, address _referral) external returns (uint256 mintedTokens);
function redeemIdleToken(uint256 _amount) external returns (uint256 redeemedTokens);
function redeemInterestBearingTokens(uint256 _amount) external;
function rebalance() external returns (bool);
}
pragma solidity 0.7.3;
interface IIdleTokenHelper {
function getMintingPrice(address idleYieldToken) view external returns (uint256 mintingPrice);
function getRedeemPrice(address idleYieldToken) view external returns (uint256 redeemPrice);
function getRedeemPrice(address idleYieldToken, address user) view external returns (uint256 redeemPrice);
}
pragma solidity 0.7.3;
import "./GovernableInit.sol";
// A clone of Governable supporting the Initializable interface and pattern
contract ControllableInit is GovernableInit {
constructor() public {
}
function initialize(address _storage) public override initializer {
GovernableInit.initialize(_storage);
}
modifier onlyController() {
require(Storage(_storage()).isController(msg.sender), "Not a controller");
_;
}
modifier onlyControllerOrGovernance(){
require((Storage(_storage()).isController(msg.sender) || Storage(_storage()).isGovernance(msg.sender)),
"The caller must be controller or governance");
_;
}
function controller() public view returns (address) {
return Storage(_storage()).controller();
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
pragma solidity 0.7.3;
import "@openzeppelin/contracts-upgradeable/proxy/Initializable.sol";
import "./Storage.sol";
// A clone of Governable supporting the Initializable interface and pattern
contract GovernableInit is Initializable {
bytes32 internal constant _STORAGE_SLOT = 0xa7ec62784904ff31cbcc32d09932a58e7f1e4476e1d041995b37c917990b16dc;
modifier onlyGovernance() {
require(Storage(_storage()).isGovernance(msg.sender), "Not governance");
_;
}
constructor() public {
assert(_STORAGE_SLOT == bytes32(uint256(keccak256("eip1967.governableInit.storage")) - 1));
}
function initialize(address _store) public virtual initializer {
_setStorage(_store);
}
function _setStorage(address newStorage) private {
bytes32 slot = _STORAGE_SLOT;
// solhint-disable-next-line no-inline-assembly
assembly {
sstore(slot, newStorage)
}
}
function setStorage(address _store) public onlyGovernance {
require(_store != address(0), "new storage shouldn't be empty");
_setStorage(_store);
}
function _storage() internal view returns (address str) {
bytes32 slot = _STORAGE_SLOT;
// solhint-disable-next-line no-inline-assembly
assembly {
str := sload(slot)
}
}
function governance() public view returns (address) {
return Storage(_storage()).governance();
}
}
// SPDX-License-Identifier: MIT
// solhint-disable-next-line compiler-version
pragma solidity >=0.4.24 <0.8.0;
import "../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
pragma solidity 0.7.3;
contract Storage {
address public governance;
address public controller;
address[] public underlyings;
address public mainUnderlying;
mapping (address => bool) public underlyingEnabled;
mapping (address => address[]) public mainUnderlyingRoutes;
address public usdc = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48;
address public usdt = 0xdAC17F958D2ee523a2206206994597C13D831ec7;
address public dai = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
address public routerAddress = 0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F; // sushi router
constructor() public {
governance = msg.sender;
addUnderlying(usdc);
addUnderlying(usdt);
addUnderlying(dai);
mainUnderlying = dai;
mainUnderlyingRoutes[usdc] = [usdc, dai];
mainUnderlyingRoutes[usdt] = [usdt, dai];
}
modifier onlyGovernance() {
require(isGovernance(msg.sender), "Not governance");
_;
}
function setGovernance(address _governance) public onlyGovernance {
require(_governance != address(0), "new governance shouldn't be empty");
governance = _governance;
}
function setController(address _controller) public onlyGovernance {
require(_controller != address(0), "new controller shouldn't be empty");
controller = _controller;
}
function isGovernance(address account) public view returns (bool) {
return account == governance;
}
function isController(address account) public view returns (bool) {
return account == controller;
}
function addUnderlying(address _underlying) public onlyGovernance {
require(_underlying != address(0), "_underlying must be defined");
underlyings.push(_underlying);
underlyingEnabled[_underlying] = true;
}
function enableUnderlying(address _underlying) public onlyGovernance {
require(_underlying != address(0), "_underlying must be defined");
underlyingEnabled[_underlying] = true;
}
function disableUnderlying(address _underlying) public onlyGovernance {
require(_underlying != address(0), "_underlying must be defined");
underlyingEnabled[_underlying] = false;
}
function setMainUnderlyingRoute(address _underlying, address[] memory route) public onlyGovernance {
require(_underlying != address(0), "_underlying must be defined");
mainUnderlyingRoutes[_underlying] = route;
}
function setMainUnderlying(address _underlying) public onlyGovernance {
require(_underlying != address(0), "_underlying must be defined");
mainUnderlying = _underlying;
}
function setRouter(address _router) public onlyGovernance {
require(_router != address(0), "_router must be defined");
routerAddress = _router;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
| should only be called by controller | interface IStrategy {
function unsalvagableTokens(address tokens) external view returns (bool);
function underlying() external view returns (address);
function vault() external view returns (address);
function withdrawAllToVault() external;
function withdrawToVault(uint256 amount) external;
function salvage(address recipient, address token, uint256 amount) external;
function doHardWork() external;
function harvest(uint256 _denom, address sender) external;
function depositArbCheck() external view returns(bool);
}
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/*
Introducing "STAKE THEM ALL" Version 1.0
"STAKE THEM ALL" is playable @ https://stakethemall.io (Ethereum Edition) and https://trx.stakethemall.io (TRON Edition)
About the game :
"STAKE THEM ALL" IS A FUN AND REWARDING PHYSICS GAME RUNNING ON THE BLOCKCHAIN
HAVE FUN WHILE PARTICIPATING TO THE HDX20 TOKEN PRICE APPRECIATION @ https://hdx20.io
How to play "STAKE THEM ALL":
Challenge MODE
--------------
Set the difficulty of your CHALLENGE by choosing how many cube you want
to stack on top of each other and get rewarded on success.
Builder MODE
------------
Stack 15 cubes in order to reach the maximum height.
The best score, if not beaten within a 24H countdown, wins the whole POT.
This product is copyrighted. Any unauthorized copy, modification, or use without express written consent from HyperDevbox is prohibited.
Copyright 2019 HyperDevbox
*/
pragma solidity ^0.4.25;
interface HDX20Interface
{
function() payable external;
function buyTokenFromGame( address _customerAddress , address _referrer_address ) payable external returns(uint256);
function payWithToken( uint256 _eth , address _player_address ) external returns(uint256);
function appreciateTokenPrice() payable external;
function totalSupply() external view returns(uint256);
function ethBalanceOf(address _customerAddress) external view returns(uint256);
function balanceOf(address _playerAddress) external view returns(uint256);
function sellingPrice( bool includeFees) external view returns(uint256);
}
contract stakethemall
{
HDX20Interface private HDXcontract = HDX20Interface(0x8942a5995bd168f347f7ec58f25a54a9a064f882);
using SafeMath for uint256;
using SafeMath128 for uint128;
/*==============================
= EVENTS =
==============================*/
event OwnershipTransferred(
address previousOwner,
address nextOwner,
uint256 timeStamp
);
event HDXcontractChanged(
address previous,
address next,
uint256 timeStamp
);
event onWithdrawGains(
address customerAddress,
uint256 ethereumWithdrawn,
uint256 timeStamp
);
event onBuyMode1(
address customerAddress,
uint256 BatchID,
uint256 BatchBlockTimeout,
uint32 Challenge
);
event onBuyMode2(
address customerAddress,
uint256 BatchID,
uint256 BatchBlockTimeout,
uint256 nb_token
);
event onNewScoreMode1(
uint256 score,
address customerAddress,
uint256 winning,
uint256 nb_token
);
event onNewScoreMode2(
uint256 score,
address customerAddress,
bool newHighscore
);
event onChangeMinimumPrice(
uint256 minimum,
uint256 timeStamp
);
event onChangeBlockTimeout(
uint32 b1,
uint32 b2
);
event onChangeTreasurePercentage(
uint32 percentage
);
/*==============================
= MODIFIERS =
==============================*/
modifier onlyOwner
{
require (msg.sender == owner );
_;
}
modifier onlyFromHDXToken
{
require (msg.sender == address( HDXcontract ));
_;
}
modifier onlyDirectTransaction
{
require (msg.sender == tx.origin);
_;
}
address public owner;
address public signerAuthority = 0xf77444cE64f3F46ba6b63F6b9411dF9c589E3319;
constructor () public
{
owner = msg.sender;
GameRoundData.extraData[0] = 20; //mode1 20%
GameRoundData.extraData[1] = 0; //mode2 current highscore
GameRoundData.extraData[2] = uint32((3600*1) / 15); //1 hour
GameRoundData.extraData[3] = uint32((3600*24) / 15); //24 hour
if ( address(this).balance > 0)
{
owner.transfer( address(this).balance );
}
}
function changeOwner(address _nextOwner) public
onlyOwner
{
require (_nextOwner != owner);
require(_nextOwner != address(0));
emit OwnershipTransferred(owner, _nextOwner , now);
owner = _nextOwner;
}
function changeSigner(address _nextSigner) public
onlyOwner
{
require (_nextSigner != signerAuthority);
require(_nextSigner != address(0));
signerAuthority = _nextSigner;
}
function changeHDXcontract(address _next) public
onlyOwner
{
require (_next != address( HDXcontract ));
require( _next != address(0));
emit HDXcontractChanged(address(HDXcontract), _next , now);
HDXcontract = HDX20Interface( _next);
}
function changeMinimumPrice( uint256 newmini) public
onlyOwner
{
if (newmini>0)
{
minimumSharePrice = newmini;
}
emit onChangeMinimumPrice( newmini , now );
}
function changeBlockTimeout( uint32 b1 , uint32 b2) public
onlyOwner
{
require( b1>0 && b2>0 );
GameRoundData.extraData[2] = b1;
GameRoundData.extraData[3] = b2;
emit onChangeBlockTimeout( b1,b2 );
}
function changeTreasurePercentage( uint32 percentage) public
onlyOwner
{
require( percentage>0 && percentage<=100);
GameRoundData.extraData[0] = percentage;
emit onChangeTreasurePercentage( percentage );
}
/*================================
= GAMES VARIABLES =
================================*/
struct PlayerData_s
{
uint256 chest;
uint256 payoutsTo;
//credit locked until we validate the score mode1
uint256 mode1LockedCredit;
uint256 mode1BatchID;
uint256 mode1BlockTimeout;
uint256 mode2BatchID;
uint256 mode2BlockTimeout;
uint32[2] packedData; //[0] = mode1 challenge how ,any cube to stack;
//[1] = mode1 multiplier
}
struct GameRoundData_s
{
//mode1
uint256 treasureAmount;
//mode2
uint256 potAmount;
address currentPotWinner;
uint256 potBlockCountdown;
uint256 hdx20AppreciationPayout;
uint256 devAppreciationPayout;
//********************************************************************************************
uint32[4] extraData; //[0] = mode1 percentage treasure
//[1] = mode2 current highscore
//[2] = mode1 and mode2 blocktimeout how manyblock to submit a valid score
//[3] = mode2 countdown how many block
}
mapping (address => PlayerData_s) private PlayerData;
GameRoundData_s private GameRoundData;
uint8 constant private HDX20BuyFees = 5;
uint8 constant private DevFees = 5;
uint8 constant private AppreciationFees = 15;
uint8 constant private TreasureAppreciation = 80;
uint8 constant private PotAppreciation = 80;
uint256 constant internal magnitude = 1e18;
uint256 private minimumSharePrice = 0.1 ether;
uint256 constant thresholdForAppreciation = 0.05 ether;
/*================================
= PUBLIC FUNCTIONS =
================================*/
//fallback will be called only from the HDX token contract to fund the game from customers's HDX20
function()
payable
public
onlyFromHDXToken
{
}
function ChargePot() public payable
{
uint256 _val = msg.value;
GameRoundData.potAmount = GameRoundData.potAmount.add( _val );
}
function ChargeTreasure() public payable
{
uint256 _val = msg.value;
GameRoundData.treasureAmount = GameRoundData.treasureAmount.add( _val );
}
//mode1
function AddTreasure( uint256 _val ) private
{
GameRoundData.treasureAmount = GameRoundData.treasureAmount.add( _val.mul( TreasureAppreciation ) / 100 );
//now HDX20 appreciation and dev account
uint256 _appreciation = SafeMath.mul( _val , AppreciationFees) / 100;
uint256 _dev = SafeMath.mul( _val , DevFees) / 100;
_dev = _dev.add( GameRoundData.devAppreciationPayout );
if (_dev>= thresholdForAppreciation )
{
GameRoundData.devAppreciationPayout = 0;
HDXcontract.buyTokenFromGame.value( _dev )( owner , address(0));
}
else
{
GameRoundData.devAppreciationPayout = _dev;
}
_appreciation = _appreciation.add( GameRoundData.hdx20AppreciationPayout );
if (_appreciation>= thresholdForAppreciation)
{
GameRoundData.hdx20AppreciationPayout = 0;
HDXcontract.appreciateTokenPrice.value( _appreciation )();
}
else
{
GameRoundData.hdx20AppreciationPayout = _appreciation;
}
}
//mode2
function AddPot( uint256 _val ) private
{
GameRoundData.potAmount = GameRoundData.potAmount.add( _val.mul( PotAppreciation ) / 100 );
//now HDX20 appreciation and dev account
uint256 _appreciation = SafeMath.mul( _val , AppreciationFees) / 100;
uint256 _dev = SafeMath.mul( _val , DevFees) / 100;
_dev = _dev.add( GameRoundData.devAppreciationPayout );
if (_dev>= thresholdForAppreciation )
{
GameRoundData.devAppreciationPayout = 0;
HDXcontract.buyTokenFromGame.value( _dev )( owner , address(0));
}
else
{
GameRoundData.devAppreciationPayout = _dev;
}
_appreciation = _appreciation.add( GameRoundData.hdx20AppreciationPayout );
if (_appreciation>= thresholdForAppreciation)
{
GameRoundData.hdx20AppreciationPayout = 0;
HDXcontract.appreciateTokenPrice.value( _appreciation )();
}
else
{
GameRoundData.hdx20AppreciationPayout = _appreciation;
}
}
function ValidMode1Score( uint256 score, uint256 mode1BatchID , bytes32 r , bytes32 s , uint8 v) public
onlyDirectTransaction
{
address _customer_address = msg.sender;
GameVar_s memory gamevar;
gamevar.score = score;
gamevar.BatchID = mode1BatchID;
gamevar.r = r;
gamevar.s = s;
gamevar.v = v;
checkPayPot();
coreValidMode1Score( _customer_address , gamevar );
}
function ValidMode2Score( uint256 score, uint256 mode2BatchID , bytes32 r , bytes32 s , uint8 v) public
onlyDirectTransaction
{
address _customer_address = msg.sender;
GameVar_s memory gamevar;
gamevar.score = score;
gamevar.BatchID = mode2BatchID;
gamevar.r = r;
gamevar.s = s;
gamevar.v = v;
checkPayPot();
coreValidMode2Score( _customer_address , gamevar );
}
struct GameVar_s
{
uint256 BatchID;
uint256 score;
bytes32 r;
bytes32 s;
uint8 v;
uint32 multiplier;
}
function checkPayPot() private
{
uint256 b1 = GameRoundData.potBlockCountdown;
if (b1>0)
{
if (block.number>=b1)
{
address _winner = GameRoundData.currentPotWinner;
uint256 _j = GameRoundData.potAmount/2;
if (_winner != address(0))
{
PlayerData[ _winner ].chest = PlayerData[ _winner ].chest.add( _j );
}
GameRoundData.currentPotWinner = address(0);
GameRoundData.potAmount = GameRoundData.potAmount.sub( _j );
//highscore to 0
GameRoundData.extraData[1] = 0;
//block at 0
GameRoundData.potBlockCountdown = 0;
}
}
}
function coreValidMode1Score( address _player_address , GameVar_s gamevar) private
{
PlayerData_s storage _PlayerData = PlayerData[ _player_address];
require((gamevar.BatchID != 0) && (gamevar.BatchID == _PlayerData.mode1BatchID) && ( _PlayerData.mode1LockedCredit>0 ));
if (block.number>=_PlayerData.mode1BlockTimeout || (ecrecover(keccak256(abi.encodePacked( gamevar.score,gamevar.BatchID )) , gamevar.v, gamevar.r, gamevar.s) != signerAuthority))
{
gamevar.score = 0;
}
if (gamevar.score> _PlayerData.packedData[0]) gamevar.score = _PlayerData.packedData[0];
uint256 _winning =0;
uint256 _hdx20 = 0;
uint256 _nb_token = 0;
uint256 _minimum = _PlayerData.mode1LockedCredit.mul(5) / 100;
if (gamevar.score>0)
{
uint256 _gain;
//percentage of treasure
_gain = GameRoundData.treasureAmount.mul( GameRoundData.extraData[0]) / 100;
//scale the gain based the credit size
_gain = _gain.mul( _PlayerData.packedData[1]) / 10;
//triple cube curve
_gain = _gain.mul( _PlayerData.packedData[0] * _PlayerData.packedData[0] * _PlayerData.packedData[0] );
_gain /= (10*10*10);
//maximum x2
if (_gain>_PlayerData.mode1LockedCredit) _gain = _PlayerData.mode1LockedCredit;
//succed challenge ?
if (gamevar.score==_PlayerData.packedData[0])
{
_winning = _PlayerData.mode1LockedCredit.add( _gain);
}
else
{
_winning = _PlayerData.mode1LockedCredit.sub( _gain );
_gain = (_gain).mul( gamevar.score-1 );
_gain /= uint256( _PlayerData.packedData[0] );
_winning = _winning.add( _gain );
}
}
if (_winning<_minimum) _winning = _minimum;
//winning cannot be zero
//HDX20BuyFees
_hdx20 = (_winning.mul(HDX20BuyFees)) / 100;
_nb_token = HDXcontract.buyTokenFromGame.value( _hdx20 )( _player_address , address(0));
//credit the player for what is won minus the HDX20
_PlayerData.chest = _PlayerData.chest.add( _winning - _hdx20 );
//loosing some ?
if (_PlayerData.mode1LockedCredit> _winning)
{
AddTreasure( _PlayerData.mode1LockedCredit - _winning );
}
//we need to pay the difference from the treasure
if (_winning>_PlayerData.mode1LockedCredit)
{
GameRoundData.treasureAmount = GameRoundData.treasureAmount.sub( _winning - _PlayerData.mode1LockedCredit);
}
//ok reset it so we can get a new one
_PlayerData.mode1BatchID = 0;
_PlayerData.mode1LockedCredit = 0;
emit onNewScoreMode1( gamevar.score , _player_address , _winning , _nb_token );
}
function coreValidMode2Score( address _player_address , GameVar_s gamevar) private
{
PlayerData_s storage _PlayerData = PlayerData[ _player_address];
if ((gamevar.BatchID != 0) && (gamevar.BatchID == _PlayerData.mode2BatchID))
{
if (block.number>=_PlayerData.mode2BlockTimeout || (ecrecover(keccak256(abi.encodePacked( gamevar.score,gamevar.BatchID )) , gamevar.v, gamevar.r, gamevar.s) != signerAuthority))
{
gamevar.score = 0;
}
if (gamevar.score>80*2*15) gamevar.score = 80*2*15;
bool _newHighscore = false;
//new highscore
if (gamevar.score > GameRoundData.extraData[1])
{
GameRoundData.extraData[1] = uint32(gamevar.score);
GameRoundData.currentPotWinner = _player_address;
GameRoundData.potBlockCountdown = block.number + uint256( GameRoundData.extraData[3] ); //24 hours countdown start
_newHighscore = true;
}
emit onNewScoreMode2( gamevar.score , _player_address , _newHighscore);
}
//ok reset it so we can get a new one
_PlayerData.mode2BatchID = 0;
}
function BuyMode1WithDividends( uint256 eth , uint32 challenge, uint256 score, uint256 BatchID, address _referrer_address , bytes32 r , bytes32 s , uint8 v) public
onlyDirectTransaction
{
require( (eth==minimumSharePrice || eth==minimumSharePrice*5 || eth==minimumSharePrice*10) && (challenge>=4 && challenge<=10) );
address _customer_address = msg.sender;
checkPayPot();
GameVar_s memory gamevar;
gamevar.score = score;
gamevar.BatchID = BatchID;
gamevar.r = r;
gamevar.s = s;
gamevar.v = v;
gamevar.multiplier = uint32(eth / minimumSharePrice);
eth = HDXcontract.payWithToken( eth , _customer_address );
require( eth>0 );
CoreBuyMode1( _customer_address , eth , challenge, _referrer_address , gamevar );
}
function BuyMode1( uint32 challenge, uint256 score, uint256 BatchID, address _referrer_address , bytes32 r , bytes32 s , uint8 v ) public payable
onlyDirectTransaction
{
address _customer_address = msg.sender;
uint256 eth = msg.value;
require( (eth==minimumSharePrice || eth==minimumSharePrice*5 || eth==minimumSharePrice*10) && (challenge>=4 && challenge<=10));
checkPayPot();
GameVar_s memory gamevar;
gamevar.score = score;
gamevar.BatchID = BatchID;
gamevar.r = r;
gamevar.s = s;
gamevar.v = v;
gamevar.multiplier = uint32(eth / minimumSharePrice);
CoreBuyMode1( _customer_address , eth , challenge, _referrer_address, gamevar);
}
function BuyMode2WithDividends( uint256 eth , uint256 score, uint256 BatchID, address _referrer_address , bytes32 r , bytes32 s , uint8 v) public
onlyDirectTransaction
{
require( (eth==minimumSharePrice) );
address _customer_address = msg.sender;
checkPayPot();
GameVar_s memory gamevar;
gamevar.score = score;
gamevar.BatchID = BatchID;
gamevar.r = r;
gamevar.s = s;
gamevar.v = v;
eth = HDXcontract.payWithToken( eth , _customer_address );
require( eth>0 );
CoreBuyMode2( _customer_address , eth , _referrer_address , gamevar );
}
function BuyMode2( uint256 score, uint256 BatchID, address _referrer_address , bytes32 r , bytes32 s , uint8 v ) public payable
onlyDirectTransaction
{
address _customer_address = msg.sender;
uint256 eth = msg.value;
require( (eth==minimumSharePrice));
checkPayPot();
GameVar_s memory gamevar;
gamevar.score = score;
gamevar.BatchID = BatchID;
gamevar.r = r;
gamevar.s = s;
gamevar.v = v;
CoreBuyMode2( _customer_address , eth , _referrer_address, gamevar);
}
/*================================
= CORE BUY FUNCTIONS =
================================*/
function CoreBuyMode1( address _player_address , uint256 eth , uint32 challenge, address _referrer_address , GameVar_s gamevar) private
{
PlayerData_s storage _PlayerData = PlayerData[ _player_address];
//we need to validate the score before buying a torpedo batch
if (gamevar.BatchID !=0 || _PlayerData.mode1BatchID !=0)
{
coreValidMode1Score( _player_address , gamevar);
}
//if we can continue then everything is fine let's create the new batch
_PlayerData.packedData[0] = challenge;
_PlayerData.packedData[1] = gamevar.multiplier;
_PlayerData.mode1BlockTimeout = block.number + (uint256(GameRoundData.extraData[2]));
_PlayerData.mode1BatchID = uint256((keccak256(abi.encodePacked( block.number,1,challenge, _player_address , address(this)))));
_PlayerData.mode1LockedCredit = eth;
emit onBuyMode1( _player_address, _PlayerData.mode1BatchID , _PlayerData.mode1BlockTimeout, _PlayerData.packedData[0]);
}
function CoreBuyMode2( address _player_address , uint256 eth , address _referrer_address , GameVar_s gamevar) private
{
PlayerData_s storage _PlayerData = PlayerData[ _player_address];
//we need to validate the score before buying a torpedo batch
if (gamevar.BatchID !=0 || _PlayerData.mode2BatchID !=0)
{
coreValidMode2Score( _player_address , gamevar);
}
//if we can continue then everything is fine let's create the new batch
_PlayerData.mode2BlockTimeout = block.number + (uint256(GameRoundData.extraData[2]));
_PlayerData.mode2BatchID = uint256((keccak256(abi.encodePacked( block.number,2, _player_address , address(this)))));
//HDX20BuyFees
uint256 _tempo = (eth.mul(HDX20BuyFees)) / 100;
eth = eth.sub( _tempo );
uint256 _nb_token = HDXcontract.buyTokenFromGame.value( _tempo )( _player_address , _referrer_address);
AddPot( eth );
emit onBuyMode2( _player_address, _PlayerData.mode2BatchID , _PlayerData.mode2BlockTimeout, _nb_token );
}
function getPotGain( address _player_address) private view
returns( uint256)
{
uint256 b1 = GameRoundData.potBlockCountdown;
if (b1>0)
{
if (block.number>=b1 && _player_address==GameRoundData.currentPotWinner)
{
return( GameRoundData.potAmount/2);
}
}
return( 0 );
}
function get_Gains(address _player_address) private view
returns( uint256)
{
uint256 _gains = PlayerData[ _player_address ].chest;
//we may have to temporary add the current pot gain to reflect the correct position
_gains = _gains.add( getPotGain(_player_address ) );
if (_gains > PlayerData[ _player_address].payoutsTo)
{
_gains -= PlayerData[ _player_address].payoutsTo;
}
else _gains = 0;
return( _gains );
}
function WithdrawGains() public
{
address _customer_address = msg.sender;
checkPayPot();
uint256 _gains = get_Gains( _customer_address );
require( _gains>0);
PlayerData[ _customer_address ].payoutsTo = PlayerData[ _customer_address ].payoutsTo.add( _gains );
emit onWithdrawGains( _customer_address , _gains , now);
_customer_address.transfer( _gains );
}
/*================================
= VIEW AND HELPERS FUNCTIONS =
================================*/
function view_get_Treasure() public
view
returns(uint256)
{
return( GameRoundData.treasureAmount );
}
function view_get_Pot() public
view
returns(uint256)
{
return( GameRoundData.potAmount );
}
function view_get_gameData() public
view
returns(
uint256 treasure,
uint256 pot,
uint32 highscore ,
address highscore_address ,
uint256 mode1BatchID,
uint256 mode1BlockTimeout,
uint32 mode1Challenge,
uint256 mode1Multiplier,
uint256 mode2BatchID,
uint256 mode2BlockTimeout,
uint256 potBlockCountdown,
uint32 percentage)
{
address _player_address = msg.sender;
treasure = GameRoundData.treasureAmount;
pot = GameRoundData.potAmount;
highscore = GameRoundData.extraData[1];
highscore_address = GameRoundData.currentPotWinner;
percentage = GameRoundData.extraData[0];
mode1BatchID = PlayerData[_player_address].mode1BatchID;
mode1BlockTimeout = PlayerData[_player_address].mode1BlockTimeout;
mode1Challenge = PlayerData[_player_address].packedData[0];
mode1Multiplier = PlayerData[_player_address].packedData[1];
mode2BatchID = PlayerData[_player_address].mode2BatchID;
mode2BlockTimeout = PlayerData[ _player_address].mode2BlockTimeout;
potBlockCountdown = GameRoundData.potBlockCountdown;
}
function view_get_Gains()
public
view
returns( uint256 gains)
{
address _player_address = msg.sender;
uint256 _gains = PlayerData[ _player_address ].chest;
_gains = _gains.add( getPotGain( _player_address ) );
if (_gains > PlayerData[ _player_address].payoutsTo)
{
_gains -= PlayerData[ _player_address].payoutsTo;
}
else _gains = 0;
return( _gains );
}
function view_get_gameStates() public
view
returns( uint256 minimumshare ,
uint256 blockNumberCurrent,
uint32 blockScoreTimeout,
uint32 blockPotTimout
)
{
return( minimumSharePrice , block.number , GameRoundData.extraData[2] , GameRoundData.extraData[3] );
}
function view_get_pendingHDX20Appreciation()
public
view
returns(uint256)
{
return GameRoundData.hdx20AppreciationPayout;
}
function view_get_pendingDevAppreciation()
public
view
returns(uint256)
{
return GameRoundData.devAppreciationPayout;
}
function totalEthereumBalance()
public
view
returns(uint256)
{
return address(this).balance;
}
function view_get_blockNumbers()
public
view
returns( uint256 b1 )
{
return( block.number);
}
}
library SafeMath {
function mul(uint256 a, uint256 b)
internal
pure
returns (uint256 c)
{
if (a == 0) {
return 0;
}
c = a * b;
require(c / a == b);
return c;
}
function sub(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
require(b <= a);
return a - b;
}
function add(uint256 a, uint256 b)
internal
pure
returns (uint256 c)
{
c = a + b;
require(c >= a);
return c;
}
}
library SafeMath128 {
function mul(uint128 a, uint128 b)
internal
pure
returns (uint128 c)
{
if (a == 0) {
return 0;
}
c = a * b;
require(c / a == b);
return c;
}
function sub(uint128 a, uint128 b)
internal
pure
returns (uint128)
{
require(b <= a);
return a - b;
}
function add(uint128 a, uint128 b)
internal
pure
returns (uint128 c)
{
c = a + b;
require(c >= a);
return c;
}
} | [0] = mode1 percentage treasure
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/**
*Submitted for verification at BscScan.com on 2021-04-29
*/
// File: @openzeppelin/contracts/utils/Context.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender)
external
view
returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity >=0.6.2 <0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{value: value}(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data)
internal
view
returns (bytes memory)
{
return
functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return
functionDelegateCall(
target,
data,
"Address: low-level delegate call failed"
);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(
token,
abi.encodeWithSelector(token.transfer.selector, to, value)
);
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(
token,
abi.encodeWithSelector(token.transferFrom.selector, from, to, value)
);
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(
token,
abi.encodeWithSelector(token.approve.selector, spender, value)
);
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(
token,
abi.encodeWithSelector(token.approve.selector, spender, newAllowance)
);
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(
value,
"SafeERC20: decreased allowance below zero"
);
_callOptionalReturn(
token,
abi.encodeWithSelector(token.approve.selector, spender, newAllowance)
);
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(
data,
"SafeERC20: low-level call failed"
);
if (returndata.length > 0) {
// Return data is optional
// solhint-disable-next-line max-line-length
require(
abi.decode(returndata, (bool)),
"SafeERC20: ERC20 operation did not succeed"
);
}
}
}
// File: @openzeppelin/contracts/utils/Pausable.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() internal {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File: contracts/interfaces/IMasterChef.sol
pragma solidity 0.6.12;
interface IMasterChef {
function deposit(uint256 _amount) external;
function withdraw(uint256 _amount) external;
function userInfo(address _user) external view returns (uint256, uint256);
function emergencyWithdraw() external;
}
// File: contracts/CakeVault.sol
pragma solidity 0.6.12;
contract CakeVault is Ownable, Pausable {
using SafeERC20 for IERC20;
using SafeMath for uint256;
struct UserInfo {
uint256 shares; // number of shares for a user
uint256 lastDepositedTime; // keeps track of deposited time for potential penalty
uint256 cakeAtLastUserAction; // keeps track of cake deposited at the last user action
uint256 lastUserActionTime; // keeps track of the last user action time
}
IERC20 public immutable token; // Cake token
IMasterChef public immutable masterchef;
mapping(address => UserInfo) public userInfo;
uint256 public totalShares;
uint256 public lastHarvestedTime;
address public admin;
address public treasury;
uint256 public constant MAX_PERFORMANCE_FEE = 9999; // 5%
uint256 public constant MAX_CALL_FEE = 9999; // 1%
uint256 public constant MAX_WITHDRAW_FEE = 9999; // 1%
uint256 public MAX_WITHDRAW_FEE_PERIOD = 365 days; // 3 days
uint256 public performanceFee = 200; // 2%
uint256 public callFee = 300; // 3%
uint256 public withdrawFee; // 100 = 1%
uint256 public withdrawFeePeriod; // ex : 3 days
event Deposit(
address indexed sender,
uint256 amount,
uint256 shares,
uint256 lastDepositedTime
);
event Withdraw(address indexed sender, uint256 amount, uint256 shares);
event Harvest(
address indexed sender,
uint256 performanceFee,
uint256 callFee
);
event Pause();
event Unpause();
event RescueTokens(
address indexed user,
address indexed token,
uint256 amount
);
/**
* @notice Constructor
* @param _token: Cake token contract
* @param _masterchef: MasterChef contract
* @param _admin: address of the admin
* @param _treasury: address of the treasury (collects fees)
*/
constructor(
IERC20 _token, // token staked (e.g eterna)
IMasterChef _masterchef, // staking contract
address _admin, // who will manage the contract
address _treasury, // wallet which will skim rewards
uint256 _withdrawFee,
uint256 _withdrawFeePeriod
) public {
token = _token;
masterchef = _masterchef;
admin = _admin;
treasury = _treasury;
withdrawFee = _withdrawFee;
withdrawFeePeriod = _withdrawFeePeriod;
// Infinite approve
IERC20(_token).safeApprove(address(_masterchef), uint256(-1));
}
/**
* @notice Checks if the msg.sender is the admin address
*/
modifier onlyAdmin() {
require(msg.sender == admin, "admin: wut?");
_;
}
/**
* @notice Checks if the msg.sender is a contract or a proxy
*/
modifier notContract() {
require(!_isContract(msg.sender), "contract not allowed");
require(msg.sender == tx.origin, "proxy contract not allowed");
_;
}
/**
* @notice Deposits funds into the Cake Vault
* @dev Only possible when contract not paused.
* @param _amount: number of tokens to deposit (in CAKE)
*/
function deposit(uint256 _amount) external whenNotPaused notContract {
require(_amount > 0, "Nothing to deposit");
uint256 pool = balanceOf();
token.safeTransferFrom(msg.sender, address(this), _amount);
uint256 currentShares = 0;
if (totalShares != 0) {
currentShares = (_amount.mul(totalShares)).div(pool);
} else {
currentShares = _amount;
}
UserInfo storage user = userInfo[msg.sender];
user.shares = user.shares.add(currentShares);
user.lastDepositedTime = block.timestamp;
totalShares = totalShares.add(currentShares);
user.cakeAtLastUserAction = user.shares.mul(balanceOf()).div(totalShares);
user.lastUserActionTime = block.timestamp;
_earn();
emit Deposit(msg.sender, _amount, currentShares, block.timestamp);
}
/**
* @notice Withdraws all funds for a user
*/
function withdrawAll() external notContract {
withdraw(userInfo[msg.sender].shares);
}
/**
* @notice Reinvests CAKE tokens into MasterChef
* @dev Only possible when contract not paused.
*/
function harvest() external notContract whenNotPaused {
IMasterChef(masterchef).withdraw(0);
uint256 bal = available();
uint256 currentPerformanceFee = bal.mul(performanceFee).div(10000);
token.safeTransfer(treasury, currentPerformanceFee);
uint256 currentCallFee = bal.mul(callFee).div(10000);
token.safeTransfer(msg.sender, currentCallFee);
_earn();
lastHarvestedTime = block.timestamp;
emit Harvest(msg.sender, currentPerformanceFee, currentCallFee);
}
/**
* @notice Sets admin address
* @dev Only callable by the contract owner.
*/
function setAdmin(address _admin) external onlyOwner {
require(_admin != address(0), "Cannot be zero address");
admin = _admin;
}
/**
* @notice Sets treasury address
* @dev Only callable by the contract owner.
*/
function setTreasury(address _treasury) external onlyOwner {
require(_treasury != address(0), "Cannot be zero address");
treasury = _treasury;
}
/**
* @notice Sets performance fee
* @dev Only callable by the contract admin.
*/
function setPerformanceFee(uint256 _performanceFee) external onlyAdmin {
require(
_performanceFee <= MAX_PERFORMANCE_FEE,
"performanceFee cannot be more than MAX_PERFORMANCE_FEE"
);
performanceFee = _performanceFee;
}
/**
* @notice Sets call fee
* @dev Only callable by the contract admin.
*/
function setCallFee(uint256 _callFee) external onlyAdmin {
require(
_callFee <= MAX_CALL_FEE,
"callFee cannot be more than MAX_CALL_FEE"
);
callFee = _callFee;
}
/**
* @notice Sets withdraw fee
* @dev Only callable by the contract admin.
*/
function setWithdrawFee(uint256 _withdrawFee) external onlyAdmin {
require(
_withdrawFee <= MAX_WITHDRAW_FEE,
"withdrawFee cannot be more than MAX_WITHDRAW_FEE"
);
withdrawFee = _withdrawFee;
}
/**
* @notice Sets withdraw fee period
* @dev Only callable by the contract admin.
*/
function setWithdrawFeePeriod(uint256 _withdrawFeePeriod) external onlyAdmin {
require(
_withdrawFeePeriod <= MAX_WITHDRAW_FEE_PERIOD,
"withdrawFeePeriod cannot be more than MAX_WITHDRAW_FEE_PERIOD"
);
withdrawFeePeriod = _withdrawFeePeriod;
}
/**
* @notice Withdraws from MasterChef to Vault without caring about rewards.
* @dev EMERGENCY ONLY. Only callable by the contract admin.
*/
function emergencyWithdraw() external onlyAdmin {
IMasterChef(masterchef).emergencyWithdraw();
}
/**
* @notice Withdraw unexpected tokens sent to the Cake Vault
*/
function inCaseTokensGetStuck(address _token) external onlyAdmin {
uint256 amount = IERC20(_token).balanceOf(address(this));
IERC20(_token).safeTransfer(msg.sender, amount);
}
/**
* @notice Triggers stopped state
* @dev Only possible when contract not paused.
*/
function pause() external onlyAdmin whenNotPaused {
_pause();
emit Pause();
}
/**
* @notice Returns to normal state
* @dev Only possible when contract is paused.
*/
function unpause() external onlyAdmin whenPaused {
_unpause();
emit Unpause();
}
/**
* @notice Calculates the price per share
*/
function getPricePerFullShare() external view returns (uint256) {
return totalShares == 0 ? 1e18 : balanceOf().mul(1e18).div(totalShares);
}
/**
* @notice Withdraws from funds from the Cake Vault
* @param _shares: Number of shares to withdraw
*/
function withdraw(uint256 _shares) public notContract {
UserInfo storage user = userInfo[msg.sender];
require(_shares > 0, "Nothing to withdraw");
require(_shares <= user.shares, "Withdraw amount exceeds balance");
uint256 currentAmount = (balanceOf().mul(_shares)).div(totalShares);
user.shares = user.shares.sub(_shares);
totalShares = totalShares.sub(_shares);
uint256 bal = available();
if (bal < currentAmount) {
uint256 balWithdraw = currentAmount.sub(bal);
IMasterChef(masterchef).withdraw(balWithdraw);
uint256 balAfter = available();
uint256 diff = balAfter.sub(bal);
if (diff < balWithdraw) {
currentAmount = bal.add(diff);
}
}
if (block.timestamp < user.lastDepositedTime.add(withdrawFeePeriod)) {
uint256 currentWithdrawFee = currentAmount.mul(withdrawFee).div(10000);
token.safeTransfer(treasury, currentWithdrawFee);
currentAmount = currentAmount.sub(currentWithdrawFee);
}
if (user.shares > 0) {
user.cakeAtLastUserAction = user.shares.mul(balanceOf()).div(totalShares);
} else {
user.cakeAtLastUserAction = 0;
}
user.lastUserActionTime = block.timestamp;
token.safeTransfer(msg.sender, currentAmount);
emit Withdraw(msg.sender, currentAmount, _shares);
}
/**
* @notice Custom logic for how much the vault allows to be borrowed
* @dev The contract puts 100% of the tokens to work.
*/
function available() public view returns (uint256) {
return token.balanceOf(address(this));
}
/**
* @notice Calculates the total underlying tokens
* @dev It includes tokens held by the contract and held in MasterChef
*/
function balanceOf() public view returns (uint256) {
(uint256 amount, ) = IMasterChef(masterchef).userInfo(address(this));
return token.balanceOf(address(this)).add(amount);
}
/**
* @notice Deposits tokens into MasterChef to earn staking rewards
*/
function _earn() internal {
uint256 bal = available();
if (bal > 0) {
IMasterChef(masterchef).deposit(bal);
}
}
function rescueToken(
address token,
address addressForReceive,
uint256 amount
) external onlyOwner {
IERC20(token).safeTransfer(addressForReceive, amount);
emit RescueTokens(msg.sender, token, amount);
}
/**
* @notice Checks if address is a contract
* @dev It prevents contract from being targetted
*/
function _isContract(address addr) internal view returns (bool) {
uint256 size;
assembly {
size := extcodesize(addr)
}
return size > 0;
}
} | * @dev Returns the addition of two unsigned integers, reverting on overflow. Counterpart to Solidity's `+` operator. Requirements: - Addition cannot overflow./ | function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
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./partial_match/1/0x88825Ffbced3f9E2777334552bB6605D833F1A3D/sources/VeriFame.sol | @dev internal function to @param from user address where token belongs @param to user address @param tokenId number of tokenId | function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data)
public payable
override
onlyAllowedOperator(from)
{
super.safeTransferFrom(from, to, tokenId, data);
}
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pragma solidity ^0.6.6;
contract Puzzle{
address payable public owner;
bool public locked;
uint public reward;
bytes32 public diff;
bytes public solution;
constructor() payable public{
owner = msg.sender;
reward = msg.value;
locked = false;
diff = bytes32(uint256(11111)); //pre-defined difficulty
}
receive () payable external { //main code, runs at every invocation
if (msg.sender == owner){ //update reward
require(!locked);
owner.transfer(reward);
reward = msg.value;
}
else
if (msg.data.length > 0){ //submit a solution
require(!locked);
if (sha256(msg.data) < diff){
msg.sender.transfer(reward); //send reward
solution = msg.data;
locked = true;
}
}
}
}
| main code, runs at every invocation
| receive () payable external { | 5,345,043 | [
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./partial_match/1/0xb36C690fe3FD6bCecA5be12D383ccB43220f1e52/sources/BREAD.sol | Anti-bot and anti-whale mappings and variables exclude from fees and max transaction amount store addresses that a automatic market maker pairs. Any transfer *to* these addresses could be subject to a maximum transfer amount | contract BREAD is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
address public constant deadAddress = address(0xdead);
bool private swapping;
address public devWallet;
uint256 public maxTransactionAmount;
uint256 public swapTokensAtAmount;
uint256 public maxWallet;
bool public limitsInEffect = true;
bool public tradingActive = false;
bool public swapEnabled = false;
bool public transferDelayEnabled = false;
uint256 public buyTotalFees;
uint256 public buyLiquidityFee;
uint256 public buyMarketingFee;
uint256 public sellTotalFees;
uint256 public sellLiquidityFee;
uint256 public sellMarketingFee;
uint256 public tokensForLiquidity;
uint256 public tokensForDev;
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) public _isExcludedMaxTransactionAmount;
mapping(address => bool) public automatedMarketMakerPairs;
event UpdateUniswapV2Router(
address indexed newAddress,
address indexed oldAddress
);
event ExcludeFromFees(address indexed account, bool isExcluded);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event devWalletUpdated(
address indexed newWallet,
address indexed oldWallet
);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event AutoNukeLP();
event ManualNukeLP();
constructor() ERC20("BREAD", "BREAD") {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
);
excludeFromMaxTransaction(address(_uniswapV2Router), true);
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
excludeFromMaxTransaction(address(uniswapV2Pair), true);
_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
uint256 _buyLiquidityFee = 1;
uint256 _buyMarketingFee = 1;
uint256 _sellLiquidityFee = 1;
uint256 _sellMarketingFee = 1;
uint256 totalSupply = 1_000_000_000 * 1e18;
buyLiquidityFee = _buyLiquidityFee;
buyMarketingFee = _buyMarketingFee;
buyTotalFees = buyLiquidityFee + buyMarketingFee;
sellLiquidityFee = _sellLiquidityFee;
sellMarketingFee = _sellMarketingFee;
sellTotalFees = sellLiquidityFee + sellMarketingFee;
excludeFromFees(owner(), true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromMaxTransaction(owner(), true);
excludeFromMaxTransaction(address(this), true);
excludeFromMaxTransaction(address(0xdead), true);
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
_mint(msg.sender, totalSupply);
}
receive() external payable {}
function enableTrading() external onlyOwner {
tradingActive = true;
swapEnabled = true;
}
function removeLimits() external onlyOwner returns (bool) {
limitsInEffect = false;
return true;
}
function disableTransferDelay() external onlyOwner returns (bool) {
transferDelayEnabled = false;
return true;
}
function updateSwapTokensAtAmount(uint256 newAmount)
external
onlyOwner
returns (bool)
{
require(
newAmount >= (totalSupply() * 1) / 100000,
"Swap amount cannot be lower than 0.001% total supply."
);
require(
newAmount <= (totalSupply() * 8) / 1000,
"Swap amount cannot be higher than 0.8% total supply."
);
swapTokensAtAmount = newAmount;
return true;
}
function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
require(
newNum >= ((totalSupply() * 1) / 1000) / 1e18,
"Cannot set maxTransactionAmount lower than 0.1%"
);
maxTransactionAmount = newNum * (10**18);
}
function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
require(
newNum >= ((totalSupply() * 5) / 1000) / 1e18,
"Cannot set maxWallet lower than 0.5%"
);
maxWallet = newNum * (10**18);
}
function excludeFromMaxTransaction(address updAds, bool isEx)
public
onlyOwner
{
_isExcludedMaxTransactionAmount[updAds] = isEx;
}
function updateSwapEnabled(bool enabled) external onlyOwner {
swapEnabled = enabled;
}
function updateBuyFees(
uint256 _liquidityFee,
uint256 _MarketingFee
) external onlyOwner {
buyLiquidityFee = _liquidityFee;
buyMarketingFee = _MarketingFee;
buyTotalFees = buyLiquidityFee + buyMarketingFee;
require(buyTotalFees <= 15, "Must keep fees at 15% or less");
}
function updateSellFees(
uint256 _liquidityFee,
uint256 _MarketingFee
) external onlyOwner {
sellLiquidityFee = _liquidityFee;
sellMarketingFee = _MarketingFee;
sellTotalFees = sellLiquidityFee + sellMarketingFee;
require(sellTotalFees <= 99, "Must keep fees at 15% or less");
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function setAutomatedMarketMakerPair(address pair, bool value)
public
onlyOwner
{
require(
pair != uniswapV2Pair,
"The pair cannot be removed from automatedMarketMakerPairs"
);
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateDevWallet(address newWallet) external onlyOwner {
emit devWalletUpdated(newWallet, devWallet);
devWallet = newWallet;
}
function isExcludedFromFees(address account) public view returns (bool) {
return _isExcludedFromFees[account];
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
if (
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
else if (
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
} else if (!_isExcludedMaxTransactionAmount[to]) {
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active."
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] + 1 <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per two blocks allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function swapTokensForEth(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
_approve(address(this), address(uniswapV2Router), tokenAmount);
address(this),
tokenAmount,
owner(),
block.timestamp
);
}
uniswapV2Router.addLiquidityETH{value: ethAmount}(
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity +
tokensForDev;
bool success;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
totalTokensToSwap /
2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForDev;
tokensForLiquidity = 0;
tokensForDev = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(
amountToSwapForETH,
ethForLiquidity,
tokensForLiquidity
);
}
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity +
tokensForDev;
bool success;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
totalTokensToSwap /
2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForDev;
tokensForLiquidity = 0;
tokensForDev = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(
amountToSwapForETH,
ethForLiquidity,
tokensForLiquidity
);
}
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity +
tokensForDev;
bool success;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
totalTokensToSwap /
2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForDev;
tokensForLiquidity = 0;
tokensForDev = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(
amountToSwapForETH,
ethForLiquidity,
tokensForLiquidity
);
}
}
uint256 liquidityTokens = (contractBalance * tokensForLiquidity) /
(success, ) = address(devWallet).call{value: ethForDev}("");
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity +
tokensForDev;
bool success;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
totalTokensToSwap /
2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForDev;
tokensForLiquidity = 0;
tokensForDev = 0;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(
amountToSwapForETH,
ethForLiquidity,
tokensForLiquidity
);
}
}
function withdraw() external onlyOwner {
uint256 balance = IERC20(address(this)).balanceOf(address(this));
IERC20(address(this)).transfer(msg.sender, balance);
payable(msg.sender).transfer(address(this).balance);
}
function withdrawToken(address _token, address _to) external onlyOwner {
require(_token != address(0), "_token address cannot be 0");
require(_token != address(this), "Can't withdraw native tokens");
uint256 _contractBalance = IERC20(_token).balanceOf(address(this));
IERC20(_token).transfer(_to, _contractBalance);
}
} | 3,667,073 | [
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./full_match/137/0x2A29dB56F0e7e9Dd6f8e1e16EE69D1F48D6A43D9/sources/contracts/MasterChef.sol | Add a new lp to the pool. Can only be called by the owner. | function add(
uint256 _allocPoint,
IBEP20 _lpToken,
uint16 _depositFeeBP,
bool _withUpdate
) public onlyOwner nonDuplicated(_lpToken) {
require(_depositFeeBP <= 400, "add: invalid deposit fee basis points");
if (_withUpdate) {
massUpdatePools();
}
uint256 lastRewardBlock =
block.number > startBlock ? block.number : startBlock;
totalAllocPoint = totalAllocPoint.add(_allocPoint);
poolExistence[_lpToken] = true;
poolInfo.push(
PoolInfo({
lpToken: _lpToken,
allocPoint: _allocPoint,
lastRewardBlock: lastRewardBlock,
accNewtPerShare: 0,
depositFeeBP: _depositFeeBP
})
);
}
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./full_match/4/0x21f44849d9490749c9EC9b49Fba383Bc4e5240d9/sources/pugzilla1.sol | subtract from sender update amount in recipient address reflect fee add amount in charity and marketing address burn transacton % | function _transferStandard(address sender_address, address recipient_address, uint256 tAmount) private {
(uint256 tTransferAmount, uint256 tFee, uint256 charity_amount, uint256 marketing_amount, uint256 burn_amount) = _getTValues(tAmount);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate);
address sender = sender_address;
address recipient = recipient_address;
uint256 sub_amount = rAmount - charity_amount - marketing_amount - burn_amount;
_rOwned[sender] = _rOwned[sender].sub(sub_amount);
uint256 transfer_amount = rTransferAmount - charity_amount - marketing_amount - burn_amount;
_rOwned[recipient] = _rOwned[recipient].add(transfer_amount);
_reflectFee(rFee, tFee);
_balances[_charity_address] += charity_amount;
_balances[_marketing_address] += marketing_amount;
emit Transfer(sender, recipient, tTransferAmount);
emit Transfer(sender, _charity_address, charity_amount);
emit Transfer(sender, _marketing_address, marketing_amount);
emit Transfer(sender, _burn_address, burn_amount);
}
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// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.5.0;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "../../abstract/MasterAware.sol";
import "../../interfaces/IClaimsReward.sol";
import "../../interfaces/IIncidents.sol";
import "../../interfaces/IPool.sol";
import "../../interfaces/IPooledStaking.sol";
import "../../interfaces/IQuotation.sol";
import "../../interfaces/IQuotationData.sol";
import "../../interfaces/ITokenController.sol";
import "../../interfaces/ITokenData.sol";
contract Quotation is IQuotation, MasterAware, ReentrancyGuard {
using SafeMath for uint;
IClaimsReward public cr;
IPool public pool;
IPooledStaking public pooledStaking;
IQuotationData public qd;
ITokenController public tc;
ITokenData public td;
IIncidents public incidents;
/**
* @dev Iupgradable Interface to update dependent contract address
*/
function changeDependentContractAddress() public onlyInternal {
cr = IClaimsReward(master.getLatestAddress("CR"));
pool = IPool(master.getLatestAddress("P1"));
pooledStaking = IPooledStaking(master.getLatestAddress("PS"));
qd = IQuotationData(master.getLatestAddress("QD"));
tc = ITokenController(master.getLatestAddress("TC"));
td = ITokenData(master.getLatestAddress("TD"));
incidents = IIncidents(master.getLatestAddress("IC"));
}
// solhint-disable-next-line no-empty-blocks
function sendEther() public payable {}
/**
* @dev Expires a cover after a set period of time and changes the status of the cover
* @dev Reduces the total and contract sum assured
* @param coverId Cover Id.
*/
function expireCover(uint coverId) external {
uint expirationDate = qd.getValidityOfCover(coverId);
require(expirationDate < now, "Quotation: cover is not due to expire");
uint coverStatus = qd.getCoverStatusNo(coverId);
require(coverStatus != uint(IQuotationData.CoverStatus.CoverExpired), "Quotation: cover already expired");
(/* claim count */, bool hasOpenClaim, /* accepted */) = tc.coverInfo(coverId);
require(!hasOpenClaim, "Quotation: cover has an open claim");
if (coverStatus != uint(IQuotationData.CoverStatus.ClaimAccepted)) {
(,, address contractAddress, bytes4 currency, uint amount,) = qd.getCoverDetailsByCoverID1(coverId);
qd.subFromTotalSumAssured(currency, amount);
qd.subFromTotalSumAssuredSC(contractAddress, currency, amount);
}
qd.changeCoverStatusNo(coverId, uint8(IQuotationData.CoverStatus.CoverExpired));
}
function withdrawCoverNote(address coverOwner, uint[] calldata coverIds, uint[] calldata reasonIndexes) external {
uint gracePeriod = tc.claimSubmissionGracePeriod();
for (uint i = 0; i < coverIds.length; i++) {
uint expirationDate = qd.getValidityOfCover(coverIds[i]);
require(expirationDate.add(gracePeriod) < now, "Quotation: cannot withdraw before grace period expiration");
}
tc.withdrawCoverNote(coverOwner, coverIds, reasonIndexes);
}
function getWithdrawableCoverNoteCoverIds(
address coverOwner
) public view returns (
uint[] memory expiredCoverIds,
bytes32[] memory lockReasons
) {
uint[] memory coverIds = qd.getAllCoversOfUser(coverOwner);
uint[] memory expiredIdsQueue = new uint[](coverIds.length);
uint gracePeriod = tc.claimSubmissionGracePeriod();
uint expiredQueueLength = 0;
for (uint i = 0; i < coverIds.length; i++) {
uint coverExpirationDate = qd.getValidityOfCover(coverIds[i]);
uint gracePeriodExpirationDate = coverExpirationDate.add(gracePeriod);
(/* claimCount */, bool hasOpenClaim, /* hasAcceptedClaim */) = tc.coverInfo(coverIds[i]);
if (!hasOpenClaim && gracePeriodExpirationDate < now) {
expiredIdsQueue[expiredQueueLength] = coverIds[i];
expiredQueueLength++;
}
}
expiredCoverIds = new uint[](expiredQueueLength);
lockReasons = new bytes32[](expiredQueueLength);
for (uint i = 0; i < expiredQueueLength; i++) {
expiredCoverIds[i] = expiredIdsQueue[i];
lockReasons[i] = keccak256(abi.encodePacked("CN", coverOwner, expiredIdsQueue[i]));
}
}
function getWithdrawableCoverNotesAmount(address coverOwner) external view returns (uint) {
uint withdrawableAmount;
bytes32[] memory lockReasons;
(/*expiredCoverIds*/, lockReasons) = getWithdrawableCoverNoteCoverIds(coverOwner);
for (uint i = 0; i < lockReasons.length; i++) {
uint coverNoteAmount = tc.tokensLocked(coverOwner, lockReasons[i]);
withdrawableAmount = withdrawableAmount.add(coverNoteAmount);
}
return withdrawableAmount;
}
/**
* @dev Makes Cover funded via NXM tokens.
* @param smartCAdd Smart Contract Address
*/
function makeCoverUsingNXMTokens(
uint[] calldata coverDetails,
uint16 coverPeriod,
bytes4 coverCurr,
address smartCAdd,
uint8 _v,
bytes32 _r,
bytes32 _s
) external onlyMember whenNotPaused {
tc.burnFrom(msg.sender, coverDetails[2]); // needs allowance
_verifyCoverDetails(msg.sender, smartCAdd, coverCurr, coverDetails, coverPeriod, _v, _r, _s, true);
}
/**
* @dev Verifies cover details signed off chain.
* @param from address of funder.
* @param scAddress Smart Contract Address
*/
function verifyCoverDetails(
address payable from,
address scAddress,
bytes4 coverCurr,
uint[] memory coverDetails,
uint16 coverPeriod,
uint8 _v,
bytes32 _r,
bytes32 _s
) public onlyInternal {
_verifyCoverDetails(
from,
scAddress,
coverCurr,
coverDetails,
coverPeriod,
_v,
_r,
_s,
false
);
}
/**
* @dev Verifies signature.
* @param coverDetails details related to cover.
* @param coverPeriod validity of cover.
* @param contractAddress smart contract address.
* @param _v argument from vrs hash.
* @param _r argument from vrs hash.
* @param _s argument from vrs hash.
*/
function verifySignature(
uint[] memory coverDetails,
uint16 coverPeriod,
bytes4 currency,
address contractAddress,
uint8 _v,
bytes32 _r,
bytes32 _s
) public view returns (bool) {
require(contractAddress != address(0));
bytes32 hash = getOrderHash(coverDetails, coverPeriod, currency, contractAddress);
return isValidSignature(hash, _v, _r, _s);
}
/**
* @dev Gets order hash for given cover details.
* @param coverDetails details realted to cover.
* @param coverPeriod validity of cover.
* @param contractAddress smart contract address.
*/
function getOrderHash(
uint[] memory coverDetails,
uint16 coverPeriod,
bytes4 currency,
address contractAddress
) public view returns (bytes32) {
return keccak256(
abi.encodePacked(
coverDetails[0],
currency,
coverPeriod,
contractAddress,
coverDetails[1],
coverDetails[2],
coverDetails[3],
coverDetails[4],
address(this)
)
);
}
/**
* @dev Verifies signature.
* @param hash order hash
* @param v argument from vrs hash.
* @param r argument from vrs hash.
* @param s argument from vrs hash.
*/
function isValidSignature(bytes32 hash, uint8 v, bytes32 r, bytes32 s) public view returns (bool) {
bytes memory prefix = "\x19Ethereum Signed Message:\n32";
bytes32 prefixedHash = keccak256(abi.encodePacked(prefix, hash));
address a = ecrecover(prefixedHash, v, r, s);
return (a == qd.getAuthQuoteEngine());
}
/**
* @dev Creates cover of the quotation, changes the status of the quotation ,
* updates the total sum assured and locks the tokens of the cover against a quote.
* @param from Quote member Ethereum address.
*/
function _makeCover(//solhint-disable-line
address payable from,
address contractAddress,
bytes4 coverCurrency,
uint[] memory coverDetails,
uint16 coverPeriod
) internal {
address underlyingToken = incidents.underlyingToken(contractAddress);
if (underlyingToken != address(0)) {
address coverAsset = cr.getCurrencyAssetAddress(coverCurrency);
require(coverAsset == underlyingToken, "Quotation: Unsupported cover asset for this product");
}
uint cid = qd.getCoverLength();
qd.addCover(
coverPeriod,
coverDetails[0],
from,
coverCurrency,
contractAddress,
coverDetails[1],
coverDetails[2]
);
uint coverNoteAmount = coverDetails[2].mul(qd.tokensRetained()).div(100);
uint gracePeriod = tc.claimSubmissionGracePeriod();
uint claimSubmissionPeriod = uint(coverPeriod).mul(1 days).add(gracePeriod);
bytes32 reason = keccak256(abi.encodePacked("CN", from, cid));
// mint and lock cover note
td.setDepositCNAmount(cid, coverNoteAmount);
tc.mintCoverNote(from, reason, coverNoteAmount, claimSubmissionPeriod);
qd.addInTotalSumAssured(coverCurrency, coverDetails[0]);
qd.addInTotalSumAssuredSC(contractAddress, coverCurrency, coverDetails[0]);
uint coverPremiumInNXM = coverDetails[2];
uint stakersRewardPercentage = td.stakerCommissionPer();
uint rewardValue = coverPremiumInNXM.mul(stakersRewardPercentage).div(100);
pooledStaking.accumulateReward(contractAddress, rewardValue);
}
/**
* @dev Makes a cover.
* @param from address of funder.
* @param scAddress Smart Contract Address
*/
function _verifyCoverDetails(
address payable from,
address scAddress,
bytes4 coverCurr,
uint[] memory coverDetails,
uint16 coverPeriod,
uint8 _v,
bytes32 _r,
bytes32 _s,
bool isNXM
) internal {
require(coverDetails[3] > now, "Quotation: Quote has expired");
require(coverPeriod >= 30 && coverPeriod <= 365, "Quotation: Cover period out of bounds");
require(!qd.timestampRepeated(coverDetails[4]), "Quotation: Quote already used");
qd.setTimestampRepeated(coverDetails[4]);
address asset = cr.getCurrencyAssetAddress(coverCurr);
if (coverCurr != "ETH" && !isNXM) {
pool.transferAssetFrom(asset, from, coverDetails[1]);
}
require(verifySignature(coverDetails, coverPeriod, coverCurr, scAddress, _v, _r, _s), "Quotation: signature mismatch");
_makeCover(from, scAddress, coverCurr, coverDetails, coverPeriod);
}
function createCover(
address payable from,
address scAddress,
bytes4 currency,
uint[] calldata coverDetails,
uint16 coverPeriod,
uint8 _v,
bytes32 _r,
bytes32 _s
) external onlyInternal {
require(coverDetails[3] > now, "Quotation: Quote has expired");
require(coverPeriod >= 30 && coverPeriod <= 365, "Quotation: Cover period out of bounds");
require(!qd.timestampRepeated(coverDetails[4]), "Quotation: Quote already used");
qd.setTimestampRepeated(coverDetails[4]);
require(verifySignature(coverDetails, coverPeriod, currency, scAddress, _v, _r, _s), "Quotation: signature mismatch");
_makeCover(from, scAddress, currency, coverDetails, coverPeriod);
}
// referenced in master, keeping for now
// solhint-disable-next-line no-empty-blocks
function transferAssetsToNewContract(address) external pure {}
function freeUpHeldCovers() external nonReentrant {
IERC20 dai = IERC20(cr.getCurrencyAssetAddress("DAI"));
uint membershipFee = td.joiningFee();
uint lastCoverId = 106;
for (uint id = 1; id <= lastCoverId; id++) {
if (qd.holdedCoverIDStatus(id) != uint(IQuotationData.HCIDStatus.kycPending)) {
continue;
}
(/*id*/, /*sc*/, bytes4 currency, /*period*/) = qd.getHoldedCoverDetailsByID1(id);
(/*id*/, address payable userAddress, uint[] memory coverDetails) = qd.getHoldedCoverDetailsByID2(id);
uint refundedETH = membershipFee;
uint coverPremium = coverDetails[1];
if (qd.refundEligible(userAddress)) {
qd.setRefundEligible(userAddress, false);
}
qd.setHoldedCoverIDStatus(id, uint(IQuotationData.HCIDStatus.kycFailedOrRefunded));
if (currency == "ETH") {
refundedETH = refundedETH.add(coverPremium);
} else {
require(dai.transfer(userAddress, coverPremium), "Quotation: DAI refund transfer failed");
}
userAddress.transfer(refundedETH);
}
}
}
pragma solidity ^0.5.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
pragma solidity ^0.5.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
pragma solidity ^0.5.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*
* _Since v2.5.0:_ this module is now much more gas efficient, given net gas
* metering changes introduced in the Istanbul hardfork.
*/
contract ReentrancyGuard {
bool private _notEntered;
constructor () internal {
// Storing an initial non-zero value makes deployment a bit more
// expensive, but in exchange the refund on every call to nonReentrant
// will be lower in amount. Since refunds are capped to a percetange of
// the total transaction's gas, it is best to keep them low in cases
// like this one, to increase the likelihood of the full refund coming
// into effect.
_notEntered = true;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_notEntered, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_notEntered = false;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_notEntered = true;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.5.0;
import "../interfaces/INXMMaster.sol";
contract MasterAware {
INXMMaster public master;
modifier onlyMember {
require(master.isMember(msg.sender), "Caller is not a member");
_;
}
modifier onlyInternal {
require(master.isInternal(msg.sender), "Caller is not an internal contract");
_;
}
modifier onlyMaster {
if (address(master) != address(0)) {
require(address(master) == msg.sender, "Not master");
}
_;
}
modifier onlyGovernance {
require(
master.checkIsAuthToGoverned(msg.sender),
"Caller is not authorized to govern"
);
_;
}
modifier whenPaused {
require(master.isPause(), "System is not paused");
_;
}
modifier whenNotPaused {
require(!master.isPause(), "System is paused");
_;
}
function changeDependentContractAddress() external;
function changeMasterAddress(address masterAddress) public onlyMaster {
master = INXMMaster(masterAddress);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
interface IClaimsReward {
/// @dev Decides the next course of action for a given claim.
function changeClaimStatus(uint claimid) external;
function getCurrencyAssetAddress(bytes4 currency) external view returns (address);
function getRewardToBeGiven(
uint check,
uint voteid,
uint flag
)
external
view
returns (
uint tokenCalculated,
bool lastClaimedCheck,
uint tokens,
uint perc
);
function upgrade(address _newAdd) external;
function getRewardToBeDistributedByUser(address _add) external view returns (uint total);
function getRewardAndClaimedStatus(uint check, uint claimId) external view returns (uint reward, bool claimed);
function claimAllPendingReward(uint records) external;
function getAllPendingRewardOfUser(address _add) external view returns (uint);
function unlockCoverNote(uint coverId) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
interface IIncidents {
function underlyingToken(address) external view returns (address);
function coveredToken(address) external view returns (address);
function claimPayout(uint) external view returns (uint);
function incidentCount() external view returns (uint);
function addIncident(
address productId,
uint incidentDate,
uint priceBefore
) external;
function redeemPayoutForMember(
uint coverId,
uint incidentId,
uint coveredTokenAmount,
address member
) external returns (uint claimId, uint payoutAmount, address payoutToken);
function redeemPayout(
uint coverId,
uint incidentId,
uint coveredTokenAmount
) external returns (uint claimId, uint payoutAmount, address payoutToken);
function pushBurns(address productId, uint maxIterations) external;
function withdrawAsset(address asset, address destination, uint amount) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
import "./IPriceFeedOracle.sol";
interface IPool {
function sellNXM(uint tokenAmount, uint minEthOut) external;
function sellNXMTokens(uint tokenAmount) external returns (bool);
function minPoolEth() external returns (uint);
function transferAssetToSwapOperator(address asset, uint amount) external;
function setAssetDataLastSwapTime(address asset, uint32 lastSwapTime) external;
function getAssetDetails(address _asset) external view returns (
uint112 min,
uint112 max,
uint32 lastAssetSwapTime,
uint maxSlippageRatio
);
function sendClaimPayout (
address asset,
address payable payoutAddress,
uint amount
) external returns (bool success);
function transferAsset(
address asset,
address payable destination,
uint amount
) external;
function upgradeCapitalPool(address payable newPoolAddress) external;
function priceFeedOracle() external view returns (IPriceFeedOracle);
function getPoolValueInEth() external view returns (uint);
function transferAssetFrom(address asset, address from, uint amount) external;
function getEthForNXM(uint nxmAmount) external view returns (uint ethAmount);
function calculateEthForNXM(
uint nxmAmount,
uint currentTotalAssetValue,
uint mcrEth
) external pure returns (uint);
function calculateMCRRatio(uint totalAssetValue, uint mcrEth) external pure returns (uint);
function calculateTokenSpotPrice(uint totalAssetValue, uint mcrEth) external pure returns (uint tokenPrice);
function getTokenPrice(address asset) external view returns (uint tokenPrice);
function getMCRRatio() external view returns (uint);
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
interface IPooledStaking {
function accumulateReward(address contractAddress, uint amount) external;
function pushBurn(address contractAddress, uint amount) external;
function hasPendingActions() external view returns (bool);
function processPendingActions(uint maxIterations) external returns (bool finished);
function contractStake(address contractAddress) external view returns (uint);
function stakerReward(address staker) external view returns (uint);
function stakerDeposit(address staker) external view returns (uint);
function stakerContractStake(address staker, address contractAddress) external view returns (uint);
function withdraw(uint amount) external;
function stakerMaxWithdrawable(address stakerAddress) external view returns (uint);
function withdrawReward(address stakerAddress) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
interface IQuotation {
function verifyCoverDetails(
address payable from,
address scAddress,
bytes4 coverCurr,
uint[] calldata coverDetails,
uint16 coverPeriod,
uint8 _v,
bytes32 _r,
bytes32 _s
) external;
function createCover(
address payable from,
address scAddress,
bytes4 currency,
uint[] calldata coverDetails,
uint16 coverPeriod,
uint8 _v,
bytes32 _r,
bytes32 _s
) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
interface IQuotationData {
function authQuoteEngine() external view returns (address);
function stlp() external view returns (uint);
function stl() external view returns (uint);
function pm() external view returns (uint);
function minDays() external view returns (uint);
function tokensRetained() external view returns (uint);
function kycAuthAddress() external view returns (address);
function refundEligible(address) external view returns (bool);
function holdedCoverIDStatus(uint) external view returns (uint);
function timestampRepeated(uint) external view returns (bool);
enum HCIDStatus {NA, kycPending, kycPass, kycFailedOrRefunded, kycPassNoCover}
enum CoverStatus {Active, ClaimAccepted, ClaimDenied, CoverExpired, ClaimSubmitted, Requested}
function addInTotalSumAssuredSC(address _add, bytes4 _curr, uint _amount) external;
function subFromTotalSumAssuredSC(address _add, bytes4 _curr, uint _amount) external;
function subFromTotalSumAssured(bytes4 _curr, uint _amount) external;
function addInTotalSumAssured(bytes4 _curr, uint _amount) external;
function setTimestampRepeated(uint _timestamp) external;
/// @dev Creates a blank new cover.
function addCover(
uint16 _coverPeriod,
uint _sumAssured,
address payable _userAddress,
bytes4 _currencyCode,
address _scAddress,
uint premium,
uint premiumNXM
) external;
function addHoldCover(
address payable from,
address scAddress,
bytes4 coverCurr,
uint[] calldata coverDetails,
uint16 coverPeriod
) external;
function setRefundEligible(address _add, bool status) external;
function setHoldedCoverIDStatus(uint holdedCoverID, uint status) external;
function setKycAuthAddress(address _add) external;
function changeAuthQuoteEngine(address _add) external;
function getUintParameters(bytes8 code) external view returns (bytes8 codeVal, uint val);
function getProductDetails()
external
view
returns (
uint _minDays,
uint _pm,
uint _stl,
uint _stlp
);
function getCoverLength() external view returns (uint len);
function getAuthQuoteEngine() external view returns (address _add);
function getTotalSumAssured(bytes4 _curr) external view returns (uint amount);
function getAllCoversOfUser(address _add) external view returns (uint[] memory allCover);
function getUserCoverLength(address _add) external view returns (uint len);
function getCoverStatusNo(uint _cid) external view returns (uint8);
function getCoverPeriod(uint _cid) external view returns (uint32 cp);
function getCoverSumAssured(uint _cid) external view returns (uint sa);
function getCurrencyOfCover(uint _cid) external view returns (bytes4 curr);
function getValidityOfCover(uint _cid) external view returns (uint date);
function getscAddressOfCover(uint _cid) external view returns (uint, address);
function getCoverMemberAddress(uint _cid) external view returns (address payable _add);
function getCoverPremiumNXM(uint _cid) external view returns (uint _premiumNXM);
function getCoverDetailsByCoverID1(
uint _cid
)
external
view
returns (
uint cid,
address _memberAddress,
address _scAddress,
bytes4 _currencyCode,
uint _sumAssured,
uint premiumNXM
);
function getCoverDetailsByCoverID2(
uint _cid
)
external
view
returns (
uint cid,
uint8 status,
uint sumAssured,
uint16 coverPeriod,
uint validUntil
);
function getHoldedCoverDetailsByID1(
uint _hcid
)
external
view
returns (
uint hcid,
address scAddress,
bytes4 coverCurr,
uint16 coverPeriod
);
function getUserHoldedCoverLength(address _add) external view returns (uint);
function getUserHoldedCoverByIndex(address _add, uint index) external view returns (uint);
function getHoldedCoverDetailsByID2(
uint _hcid
)
external
view
returns (
uint hcid,
address payable memberAddress,
uint[] memory coverDetails
);
function getTotalSumAssuredSC(address _add, bytes4 _curr) external view returns (uint amount);
function changeCoverStatusNo(uint _cid, uint8 _stat) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
interface ITokenController {
function coverInfo(uint id) external view returns (uint16 claimCount, bool hasOpenClaim, bool hasAcceptedClaim);
function claimSubmissionGracePeriod() external view returns (uint);
function withdrawCoverNote(
address _of,
uint[] calldata _coverIds,
uint[] calldata _indexes
) external;
function markCoverClaimOpen(uint coverId) external;
function markCoverClaimClosed(uint coverId, bool isAccepted) external;
function changeOperator(address _newOperator) external;
function operatorTransfer(address _from, address _to, uint _value) external returns (bool);
function lockClaimAssessmentTokens(uint256 _amount, uint256 _time) external;
function lockOf(address _of, bytes32 _reason, uint256 _amount, uint256 _time) external returns (bool);
function mintCoverNote(
address _of,
bytes32 _reason,
uint256 _amount,
uint256 _time
) external;
function extendClaimAssessmentLock(uint256 _time) external;
function extendLockOf(address _of, bytes32 _reason, uint256 _time) external returns (bool);
function increaseClaimAssessmentLock(uint256 _amount) external;
function burnFrom(address _of, uint amount) external returns (bool);
function burnLockedTokens(address _of, bytes32 _reason, uint256 _amount) external;
function reduceLock(address _of, bytes32 _reason, uint256 _time) external;
function releaseLockedTokens(address _of, bytes32 _reason, uint256 _amount) external;
function addToWhitelist(address _member) external;
function removeFromWhitelist(address _member) external;
function mint(address _member, uint _amount) external;
function lockForMemberVote(address _of, uint _days) external;
function withdrawClaimAssessmentTokens(address _of) external;
function getLockReasons(address _of) external view returns (bytes32[] memory reasons);
function getLockedTokensValidity(address _of, bytes32 reason) external view returns (uint256 validity);
function getUnlockableTokens(address _of) external view returns (uint256 unlockableTokens);
function tokensLocked(address _of, bytes32 _reason) external view returns (uint256 amount);
function tokensLockedWithValidity(address _of, bytes32 _reason)
external
view
returns (uint256 amount, uint256 validity);
function tokensUnlockable(address _of, bytes32 _reason) external view returns (uint256 amount);
function totalSupply() external view returns (uint256);
function tokensLockedAtTime(address _of, bytes32 _reason, uint256 _time) external view returns (uint256 amount);
function totalBalanceOf(address _of) external view returns (uint256 amount);
function totalLockedBalance(address _of) external view returns (uint256 amount);
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
interface ITokenData {
function walletAddress() external view returns (address payable);
function lockTokenTimeAfterCoverExp() external view returns (uint);
function bookTime() external view returns (uint);
function lockCADays() external view returns (uint);
function lockMVDays() external view returns (uint);
function scValidDays() external view returns (uint);
function joiningFee() external view returns (uint);
function stakerCommissionPer() external view returns (uint);
function stakerMaxCommissionPer() external view returns (uint);
function tokenExponent() external view returns (uint);
function priceStep() external view returns (uint);
function depositedCN(uint) external view returns (uint amount, bool isDeposited);
function lastCompletedStakeCommission(address) external view returns (uint);
function changeWalletAddress(address payable _address) external;
function getStakerStakedContractByIndex(
address _stakerAddress,
uint _stakerIndex
)
external
view
returns (address stakedContractAddress);
function getStakerStakedBurnedByIndex(
address _stakerAddress,
uint _stakerIndex
)
external
view
returns (uint burnedAmount);
function getStakerStakedUnlockableBeforeLastBurnByIndex(
address _stakerAddress,
uint _stakerIndex
)
external
view
returns (uint unlockable);
function getStakerStakedContractIndex(
address _stakerAddress,
uint _stakerIndex
)
external
view
returns (uint scIndex);
function getStakedContractStakerIndex(
address _stakedContractAddress,
uint _stakedContractIndex
)
external
view
returns (uint sIndex);
function getStakerInitialStakedAmountOnContract(
address _stakerAddress,
uint _stakerIndex
)
external
view
returns (uint amount);
function getStakerStakedContractLength(
address _stakerAddress
)
external
view
returns (uint length);
function getStakerUnlockedStakedTokens(
address _stakerAddress,
uint _stakerIndex
)
external
view
returns (uint amount);
function pushUnlockedStakedTokens(
address _stakerAddress,
uint _stakerIndex,
uint _amount
) external;
function pushBurnedTokens(
address _stakerAddress,
uint _stakerIndex,
uint _amount
) external;
function pushUnlockableBeforeLastBurnTokens(
address _stakerAddress,
uint _stakerIndex,
uint _amount
) external;
function setUnlockableBeforeLastBurnTokens(
address _stakerAddress,
uint _stakerIndex,
uint _amount
) external;
function pushEarnedStakeCommissions(
address _stakerAddress,
address _stakedContractAddress,
uint _stakedContractIndex,
uint _commissionAmount
) external;
function pushRedeemedStakeCommissions(
address _stakerAddress,
uint _stakerIndex,
uint _amount
) external;
function getStakerEarnedStakeCommission(
address _stakerAddress,
uint _stakerIndex
)
external
view
returns (uint);
function getStakerRedeemedStakeCommission(
address _stakerAddress,
uint _stakerIndex
)
external
view
returns (uint);
function getStakerTotalEarnedStakeCommission(
address _stakerAddress
)
external
view
returns (uint totalCommissionEarned);
function getStakerTotalReedmedStakeCommission(
address _stakerAddress
)
external
view
returns (uint totalCommissionRedeemed);
function setDepositCN(uint coverId, bool flag) external;
function getStakedContractStakerByIndex(
address _stakedContractAddress,
uint _stakedContractIndex
)
external
view
returns (address stakerAddress);
function getStakedContractStakersLength(
address _stakedContractAddress
) external view returns (uint length);
function addStake(
address _stakerAddress,
address _stakedContractAddress,
uint _amount
) external returns (uint scIndex);
function bookCATokens(address _of) external;
function isCATokensBooked(address _of) external view returns (bool res);
function setStakedContractCurrentCommissionIndex(
address _stakedContractAddress,
uint _index
) external;
function setLastCompletedStakeCommissionIndex(
address _stakerAddress,
uint _index
) external;
function setStakedContractCurrentBurnIndex(
address _stakedContractAddress,
uint _index
) external;
function setDepositCNAmount(uint coverId, uint amount) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
interface INXMMaster {
function tokenAddress() external view returns (address);
function owner() external view returns (address);
function masterInitialized() external view returns (bool);
function isInternal(address _add) external view returns (bool);
function isPause() external view returns (bool check);
function isOwner(address _add) external view returns (bool);
function isMember(address _add) external view returns (bool);
function checkIsAuthToGoverned(address _add) external view returns (bool);
function dAppLocker() external view returns (address _add);
function getLatestAddress(bytes2 _contractName) external view returns (address payable contractAddress);
function upgradeMultipleContracts(
bytes2[] calldata _contractCodes,
address payable[] calldata newAddresses
) external;
function removeContracts(bytes2[] calldata contractCodesToRemove) external;
function addNewInternalContracts(
bytes2[] calldata _contractCodes,
address payable[] calldata newAddresses,
uint[] calldata _types
) external;
function updateOwnerParameters(bytes8 code, address payable val) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.0;
interface IPriceFeedOracle {
function daiAddress() external view returns (address);
function stETH() external view returns (address);
function ETH() external view returns (address);
function getAssetToEthRate(address asset) external view returns (uint);
function getAssetForEth(address asset, uint ethIn) external view returns (uint);
}
| * @dev Verifies cover details signed off chain. @param from address of funder. @param scAddress Smart Contract Address/ | function verifyCoverDetails(
address payable from,
address scAddress,
bytes4 coverCurr,
uint[] memory coverDetails,
uint16 coverPeriod,
uint8 _v,
bytes32 _r,
bytes32 _s
) public onlyInternal {
_verifyCoverDetails(
from,
scAddress,
coverCurr,
coverDetails,
coverPeriod,
_v,
_r,
_s,
false
);
}
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// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/FixedPoint.sol";
// Simple contract used to withdraw liquidations using a DSProxy from legacy contracts (1.2.2 and below).
contract LiquidationWithdrawer {
function withdrawLiquidation(
address financialContractAddress,
uint256 liquidationId,
address sponsor
) public returns (FixedPoint.Unsigned memory) {
return IFinancialContract(financialContractAddress).withdrawLiquidation(liquidationId, sponsor);
}
}
interface IFinancialContract {
function withdrawLiquidation(uint256 liquidationId, address sponsor)
external
returns (FixedPoint.Unsigned memory amountWithdrawn);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/math/SignedSafeMath.sol";
/**
* @title Library for fixed point arithmetic on uints
*/
library FixedPoint {
using SafeMath for uint256;
using SignedSafeMath for int256;
// Supports 18 decimals. E.g., 1e18 represents "1", 5e17 represents "0.5".
// For unsigned values:
// This can represent a value up to (2^256 - 1)/10^18 = ~10^59. 10^59 will be stored internally as uint256 10^77.
uint256 private constant FP_SCALING_FACTOR = 10**18;
// --------------------------------------- UNSIGNED -----------------------------------------------------------------------------
struct Unsigned {
uint256 rawValue;
}
/**
* @notice Constructs an `Unsigned` from an unscaled uint, e.g., `b=5` gets stored internally as `5*(10**18)`.
* @param a uint to convert into a FixedPoint.
* @return the converted FixedPoint.
*/
function fromUnscaledUint(uint256 a) internal pure returns (Unsigned memory) {
return Unsigned(a.mul(FP_SCALING_FACTOR));
}
/**
* @notice Whether `a` is equal to `b`.
* @param a a FixedPoint.
* @param b a uint256.
* @return True if equal, or False.
*/
function isEqual(Unsigned memory a, uint256 b) internal pure returns (bool) {
return a.rawValue == fromUnscaledUint(b).rawValue;
}
/**
* @notice Whether `a` is equal to `b`.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return True if equal, or False.
*/
function isEqual(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
return a.rawValue == b.rawValue;
}
/**
* @notice Whether `a` is greater than `b`.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return True if `a > b`, or False.
*/
function isGreaterThan(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
return a.rawValue > b.rawValue;
}
/**
* @notice Whether `a` is greater than `b`.
* @param a a FixedPoint.
* @param b a uint256.
* @return True if `a > b`, or False.
*/
function isGreaterThan(Unsigned memory a, uint256 b) internal pure returns (bool) {
return a.rawValue > fromUnscaledUint(b).rawValue;
}
/**
* @notice Whether `a` is greater than `b`.
* @param a a uint256.
* @param b a FixedPoint.
* @return True if `a > b`, or False.
*/
function isGreaterThan(uint256 a, Unsigned memory b) internal pure returns (bool) {
return fromUnscaledUint(a).rawValue > b.rawValue;
}
/**
* @notice Whether `a` is greater than or equal to `b`.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return True if `a >= b`, or False.
*/
function isGreaterThanOrEqual(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
return a.rawValue >= b.rawValue;
}
/**
* @notice Whether `a` is greater than or equal to `b`.
* @param a a FixedPoint.
* @param b a uint256.
* @return True if `a >= b`, or False.
*/
function isGreaterThanOrEqual(Unsigned memory a, uint256 b) internal pure returns (bool) {
return a.rawValue >= fromUnscaledUint(b).rawValue;
}
/**
* @notice Whether `a` is greater than or equal to `b`.
* @param a a uint256.
* @param b a FixedPoint.
* @return True if `a >= b`, or False.
*/
function isGreaterThanOrEqual(uint256 a, Unsigned memory b) internal pure returns (bool) {
return fromUnscaledUint(a).rawValue >= b.rawValue;
}
/**
* @notice Whether `a` is less than `b`.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return True if `a < b`, or False.
*/
function isLessThan(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
return a.rawValue < b.rawValue;
}
/**
* @notice Whether `a` is less than `b`.
* @param a a FixedPoint.
* @param b a uint256.
* @return True if `a < b`, or False.
*/
function isLessThan(Unsigned memory a, uint256 b) internal pure returns (bool) {
return a.rawValue < fromUnscaledUint(b).rawValue;
}
/**
* @notice Whether `a` is less than `b`.
* @param a a uint256.
* @param b a FixedPoint.
* @return True if `a < b`, or False.
*/
function isLessThan(uint256 a, Unsigned memory b) internal pure returns (bool) {
return fromUnscaledUint(a).rawValue < b.rawValue;
}
/**
* @notice Whether `a` is less than or equal to `b`.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return True if `a <= b`, or False.
*/
function isLessThanOrEqual(Unsigned memory a, Unsigned memory b) internal pure returns (bool) {
return a.rawValue <= b.rawValue;
}
/**
* @notice Whether `a` is less than or equal to `b`.
* @param a a FixedPoint.
* @param b a uint256.
* @return True if `a <= b`, or False.
*/
function isLessThanOrEqual(Unsigned memory a, uint256 b) internal pure returns (bool) {
return a.rawValue <= fromUnscaledUint(b).rawValue;
}
/**
* @notice Whether `a` is less than or equal to `b`.
* @param a a uint256.
* @param b a FixedPoint.
* @return True if `a <= b`, or False.
*/
function isLessThanOrEqual(uint256 a, Unsigned memory b) internal pure returns (bool) {
return fromUnscaledUint(a).rawValue <= b.rawValue;
}
/**
* @notice The minimum of `a` and `b`.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return the minimum of `a` and `b`.
*/
function min(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
return a.rawValue < b.rawValue ? a : b;
}
/**
* @notice The maximum of `a` and `b`.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return the maximum of `a` and `b`.
*/
function max(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
return a.rawValue > b.rawValue ? a : b;
}
/**
* @notice Adds two `Unsigned`s, reverting on overflow.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return the sum of `a` and `b`.
*/
function add(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
return Unsigned(a.rawValue.add(b.rawValue));
}
/**
* @notice Adds an `Unsigned` to an unscaled uint, reverting on overflow.
* @param a a FixedPoint.
* @param b a uint256.
* @return the sum of `a` and `b`.
*/
function add(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
return add(a, fromUnscaledUint(b));
}
/**
* @notice Subtracts two `Unsigned`s, reverting on overflow.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return the difference of `a` and `b`.
*/
function sub(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
return Unsigned(a.rawValue.sub(b.rawValue));
}
/**
* @notice Subtracts an unscaled uint256 from an `Unsigned`, reverting on overflow.
* @param a a FixedPoint.
* @param b a uint256.
* @return the difference of `a` and `b`.
*/
function sub(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
return sub(a, fromUnscaledUint(b));
}
/**
* @notice Subtracts an `Unsigned` from an unscaled uint256, reverting on overflow.
* @param a a uint256.
* @param b a FixedPoint.
* @return the difference of `a` and `b`.
*/
function sub(uint256 a, Unsigned memory b) internal pure returns (Unsigned memory) {
return sub(fromUnscaledUint(a), b);
}
/**
* @notice Multiplies two `Unsigned`s, reverting on overflow.
* @dev This will "floor" the product.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return the product of `a` and `b`.
*/
function mul(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
// There are two caveats with this computation:
// 1. Max output for the represented number is ~10^41, otherwise an intermediate value overflows. 10^41 is
// stored internally as a uint256 ~10^59.
// 2. Results that can't be represented exactly are truncated not rounded. E.g., 1.4 * 2e-18 = 2.8e-18, which
// would round to 3, but this computation produces the result 2.
// No need to use SafeMath because FP_SCALING_FACTOR != 0.
return Unsigned(a.rawValue.mul(b.rawValue) / FP_SCALING_FACTOR);
}
/**
* @notice Multiplies an `Unsigned` and an unscaled uint256, reverting on overflow.
* @dev This will "floor" the product.
* @param a a FixedPoint.
* @param b a uint256.
* @return the product of `a` and `b`.
*/
function mul(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
return Unsigned(a.rawValue.mul(b));
}
/**
* @notice Multiplies two `Unsigned`s and "ceil's" the product, reverting on overflow.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return the product of `a` and `b`.
*/
function mulCeil(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
uint256 mulRaw = a.rawValue.mul(b.rawValue);
uint256 mulFloor = mulRaw / FP_SCALING_FACTOR;
uint256 mod = mulRaw.mod(FP_SCALING_FACTOR);
if (mod != 0) {
return Unsigned(mulFloor.add(1));
} else {
return Unsigned(mulFloor);
}
}
/**
* @notice Multiplies an `Unsigned` and an unscaled uint256 and "ceil's" the product, reverting on overflow.
* @param a a FixedPoint.
* @param b a FixedPoint.
* @return the product of `a` and `b`.
*/
function mulCeil(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
// Since b is an int, there is no risk of truncation and we can just mul it normally
return Unsigned(a.rawValue.mul(b));
}
/**
* @notice Divides one `Unsigned` by an `Unsigned`, reverting on overflow or division by 0.
* @dev This will "floor" the quotient.
* @param a a FixedPoint numerator.
* @param b a FixedPoint denominator.
* @return the quotient of `a` divided by `b`.
*/
function div(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
// There are two caveats with this computation:
// 1. Max value for the number dividend `a` represents is ~10^41, otherwise an intermediate value overflows.
// 10^41 is stored internally as a uint256 10^59.
// 2. Results that can't be represented exactly are truncated not rounded. E.g., 2 / 3 = 0.6 repeating, which
// would round to 0.666666666666666667, but this computation produces the result 0.666666666666666666.
return Unsigned(a.rawValue.mul(FP_SCALING_FACTOR).div(b.rawValue));
}
/**
* @notice Divides one `Unsigned` by an unscaled uint256, reverting on overflow or division by 0.
* @dev This will "floor" the quotient.
* @param a a FixedPoint numerator.
* @param b a uint256 denominator.
* @return the quotient of `a` divided by `b`.
*/
function div(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
return Unsigned(a.rawValue.div(b));
}
/**
* @notice Divides one unscaled uint256 by an `Unsigned`, reverting on overflow or division by 0.
* @dev This will "floor" the quotient.
* @param a a uint256 numerator.
* @param b a FixedPoint denominator.
* @return the quotient of `a` divided by `b`.
*/
function div(uint256 a, Unsigned memory b) internal pure returns (Unsigned memory) {
return div(fromUnscaledUint(a), b);
}
/**
* @notice Divides one `Unsigned` by an `Unsigned` and "ceil's" the quotient, reverting on overflow or division by 0.
* @param a a FixedPoint numerator.
* @param b a FixedPoint denominator.
* @return the quotient of `a` divided by `b`.
*/
function divCeil(Unsigned memory a, Unsigned memory b) internal pure returns (Unsigned memory) {
uint256 aScaled = a.rawValue.mul(FP_SCALING_FACTOR);
uint256 divFloor = aScaled.div(b.rawValue);
uint256 mod = aScaled.mod(b.rawValue);
if (mod != 0) {
return Unsigned(divFloor.add(1));
} else {
return Unsigned(divFloor);
}
}
/**
* @notice Divides one `Unsigned` by an unscaled uint256 and "ceil's" the quotient, reverting on overflow or division by 0.
* @param a a FixedPoint numerator.
* @param b a uint256 denominator.
* @return the quotient of `a` divided by `b`.
*/
function divCeil(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory) {
// Because it is possible that a quotient gets truncated, we can't just call "Unsigned(a.rawValue.div(b))"
// similarly to mulCeil with a uint256 as the second parameter. Therefore we need to convert b into an Unsigned.
// This creates the possibility of overflow if b is very large.
return divCeil(a, fromUnscaledUint(b));
}
/**
* @notice Raises an `Unsigned` to the power of an unscaled uint256, reverting on overflow. E.g., `b=2` squares `a`.
* @dev This will "floor" the result.
* @param a a FixedPoint numerator.
* @param b a uint256 denominator.
* @return output is `a` to the power of `b`.
*/
function pow(Unsigned memory a, uint256 b) internal pure returns (Unsigned memory output) {
output = fromUnscaledUint(1);
for (uint256 i = 0; i < b; i = i.add(1)) {
output = mul(output, a);
}
}
// ------------------------------------------------- SIGNED -------------------------------------------------------------
// Supports 18 decimals. E.g., 1e18 represents "1", 5e17 represents "0.5".
// For signed values:
// This can represent a value up (or down) to +-(2^255 - 1)/10^18 = ~10^58. 10^58 will be stored internally as int256 10^76.
int256 private constant SFP_SCALING_FACTOR = 10**18;
struct Signed {
int256 rawValue;
}
function fromSigned(Signed memory a) internal pure returns (Unsigned memory) {
require(a.rawValue >= 0, "Negative value provided");
return Unsigned(uint256(a.rawValue));
}
function fromUnsigned(Unsigned memory a) internal pure returns (Signed memory) {
require(a.rawValue <= uint256(type(int256).max), "Unsigned too large");
return Signed(int256(a.rawValue));
}
/**
* @notice Constructs a `Signed` from an unscaled int, e.g., `b=5` gets stored internally as `5*(10**18)`.
* @param a int to convert into a FixedPoint.Signed.
* @return the converted FixedPoint.Signed.
*/
function fromUnscaledInt(int256 a) internal pure returns (Signed memory) {
return Signed(a.mul(SFP_SCALING_FACTOR));
}
/**
* @notice Whether `a` is equal to `b`.
* @param a a FixedPoint.Signed.
* @param b a int256.
* @return True if equal, or False.
*/
function isEqual(Signed memory a, int256 b) internal pure returns (bool) {
return a.rawValue == fromUnscaledInt(b).rawValue;
}
/**
* @notice Whether `a` is equal to `b`.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return True if equal, or False.
*/
function isEqual(Signed memory a, Signed memory b) internal pure returns (bool) {
return a.rawValue == b.rawValue;
}
/**
* @notice Whether `a` is greater than `b`.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return True if `a > b`, or False.
*/
function isGreaterThan(Signed memory a, Signed memory b) internal pure returns (bool) {
return a.rawValue > b.rawValue;
}
/**
* @notice Whether `a` is greater than `b`.
* @param a a FixedPoint.Signed.
* @param b an int256.
* @return True if `a > b`, or False.
*/
function isGreaterThan(Signed memory a, int256 b) internal pure returns (bool) {
return a.rawValue > fromUnscaledInt(b).rawValue;
}
/**
* @notice Whether `a` is greater than `b`.
* @param a an int256.
* @param b a FixedPoint.Signed.
* @return True if `a > b`, or False.
*/
function isGreaterThan(int256 a, Signed memory b) internal pure returns (bool) {
return fromUnscaledInt(a).rawValue > b.rawValue;
}
/**
* @notice Whether `a` is greater than or equal to `b`.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return True if `a >= b`, or False.
*/
function isGreaterThanOrEqual(Signed memory a, Signed memory b) internal pure returns (bool) {
return a.rawValue >= b.rawValue;
}
/**
* @notice Whether `a` is greater than or equal to `b`.
* @param a a FixedPoint.Signed.
* @param b an int256.
* @return True if `a >= b`, or False.
*/
function isGreaterThanOrEqual(Signed memory a, int256 b) internal pure returns (bool) {
return a.rawValue >= fromUnscaledInt(b).rawValue;
}
/**
* @notice Whether `a` is greater than or equal to `b`.
* @param a an int256.
* @param b a FixedPoint.Signed.
* @return True if `a >= b`, or False.
*/
function isGreaterThanOrEqual(int256 a, Signed memory b) internal pure returns (bool) {
return fromUnscaledInt(a).rawValue >= b.rawValue;
}
/**
* @notice Whether `a` is less than `b`.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return True if `a < b`, or False.
*/
function isLessThan(Signed memory a, Signed memory b) internal pure returns (bool) {
return a.rawValue < b.rawValue;
}
/**
* @notice Whether `a` is less than `b`.
* @param a a FixedPoint.Signed.
* @param b an int256.
* @return True if `a < b`, or False.
*/
function isLessThan(Signed memory a, int256 b) internal pure returns (bool) {
return a.rawValue < fromUnscaledInt(b).rawValue;
}
/**
* @notice Whether `a` is less than `b`.
* @param a an int256.
* @param b a FixedPoint.Signed.
* @return True if `a < b`, or False.
*/
function isLessThan(int256 a, Signed memory b) internal pure returns (bool) {
return fromUnscaledInt(a).rawValue < b.rawValue;
}
/**
* @notice Whether `a` is less than or equal to `b`.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return True if `a <= b`, or False.
*/
function isLessThanOrEqual(Signed memory a, Signed memory b) internal pure returns (bool) {
return a.rawValue <= b.rawValue;
}
/**
* @notice Whether `a` is less than or equal to `b`.
* @param a a FixedPoint.Signed.
* @param b an int256.
* @return True if `a <= b`, or False.
*/
function isLessThanOrEqual(Signed memory a, int256 b) internal pure returns (bool) {
return a.rawValue <= fromUnscaledInt(b).rawValue;
}
/**
* @notice Whether `a` is less than or equal to `b`.
* @param a an int256.
* @param b a FixedPoint.Signed.
* @return True if `a <= b`, or False.
*/
function isLessThanOrEqual(int256 a, Signed memory b) internal pure returns (bool) {
return fromUnscaledInt(a).rawValue <= b.rawValue;
}
/**
* @notice The minimum of `a` and `b`.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return the minimum of `a` and `b`.
*/
function min(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
return a.rawValue < b.rawValue ? a : b;
}
/**
* @notice The maximum of `a` and `b`.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return the maximum of `a` and `b`.
*/
function max(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
return a.rawValue > b.rawValue ? a : b;
}
/**
* @notice Adds two `Signed`s, reverting on overflow.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return the sum of `a` and `b`.
*/
function add(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
return Signed(a.rawValue.add(b.rawValue));
}
/**
* @notice Adds an `Signed` to an unscaled int, reverting on overflow.
* @param a a FixedPoint.Signed.
* @param b an int256.
* @return the sum of `a` and `b`.
*/
function add(Signed memory a, int256 b) internal pure returns (Signed memory) {
return add(a, fromUnscaledInt(b));
}
/**
* @notice Subtracts two `Signed`s, reverting on overflow.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return the difference of `a` and `b`.
*/
function sub(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
return Signed(a.rawValue.sub(b.rawValue));
}
/**
* @notice Subtracts an unscaled int256 from an `Signed`, reverting on overflow.
* @param a a FixedPoint.Signed.
* @param b an int256.
* @return the difference of `a` and `b`.
*/
function sub(Signed memory a, int256 b) internal pure returns (Signed memory) {
return sub(a, fromUnscaledInt(b));
}
/**
* @notice Subtracts an `Signed` from an unscaled int256, reverting on overflow.
* @param a an int256.
* @param b a FixedPoint.Signed.
* @return the difference of `a` and `b`.
*/
function sub(int256 a, Signed memory b) internal pure returns (Signed memory) {
return sub(fromUnscaledInt(a), b);
}
/**
* @notice Multiplies two `Signed`s, reverting on overflow.
* @dev This will "floor" the product.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return the product of `a` and `b`.
*/
function mul(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
// There are two caveats with this computation:
// 1. Max output for the represented number is ~10^41, otherwise an intermediate value overflows. 10^41 is
// stored internally as an int256 ~10^59.
// 2. Results that can't be represented exactly are truncated not rounded. E.g., 1.4 * 2e-18 = 2.8e-18, which
// would round to 3, but this computation produces the result 2.
// No need to use SafeMath because SFP_SCALING_FACTOR != 0.
return Signed(a.rawValue.mul(b.rawValue) / SFP_SCALING_FACTOR);
}
/**
* @notice Multiplies an `Signed` and an unscaled int256, reverting on overflow.
* @dev This will "floor" the product.
* @param a a FixedPoint.Signed.
* @param b an int256.
* @return the product of `a` and `b`.
*/
function mul(Signed memory a, int256 b) internal pure returns (Signed memory) {
return Signed(a.rawValue.mul(b));
}
/**
* @notice Multiplies two `Signed`s and "ceil's" the product, reverting on overflow.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return the product of `a` and `b`.
*/
function mulAwayFromZero(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
int256 mulRaw = a.rawValue.mul(b.rawValue);
int256 mulTowardsZero = mulRaw / SFP_SCALING_FACTOR;
// Manual mod because SignedSafeMath doesn't support it.
int256 mod = mulRaw % SFP_SCALING_FACTOR;
if (mod != 0) {
bool isResultPositive = isLessThan(a, 0) == isLessThan(b, 0);
int256 valueToAdd = isResultPositive ? int256(1) : int256(-1);
return Signed(mulTowardsZero.add(valueToAdd));
} else {
return Signed(mulTowardsZero);
}
}
/**
* @notice Multiplies an `Signed` and an unscaled int256 and "ceil's" the product, reverting on overflow.
* @param a a FixedPoint.Signed.
* @param b a FixedPoint.Signed.
* @return the product of `a` and `b`.
*/
function mulAwayFromZero(Signed memory a, int256 b) internal pure returns (Signed memory) {
// Since b is an int, there is no risk of truncation and we can just mul it normally
return Signed(a.rawValue.mul(b));
}
/**
* @notice Divides one `Signed` by an `Signed`, reverting on overflow or division by 0.
* @dev This will "floor" the quotient.
* @param a a FixedPoint numerator.
* @param b a FixedPoint denominator.
* @return the quotient of `a` divided by `b`.
*/
function div(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
// There are two caveats with this computation:
// 1. Max value for the number dividend `a` represents is ~10^41, otherwise an intermediate value overflows.
// 10^41 is stored internally as an int256 10^59.
// 2. Results that can't be represented exactly are truncated not rounded. E.g., 2 / 3 = 0.6 repeating, which
// would round to 0.666666666666666667, but this computation produces the result 0.666666666666666666.
return Signed(a.rawValue.mul(SFP_SCALING_FACTOR).div(b.rawValue));
}
/**
* @notice Divides one `Signed` by an unscaled int256, reverting on overflow or division by 0.
* @dev This will "floor" the quotient.
* @param a a FixedPoint numerator.
* @param b an int256 denominator.
* @return the quotient of `a` divided by `b`.
*/
function div(Signed memory a, int256 b) internal pure returns (Signed memory) {
return Signed(a.rawValue.div(b));
}
/**
* @notice Divides one unscaled int256 by an `Signed`, reverting on overflow or division by 0.
* @dev This will "floor" the quotient.
* @param a an int256 numerator.
* @param b a FixedPoint denominator.
* @return the quotient of `a` divided by `b`.
*/
function div(int256 a, Signed memory b) internal pure returns (Signed memory) {
return div(fromUnscaledInt(a), b);
}
/**
* @notice Divides one `Signed` by an `Signed` and "ceil's" the quotient, reverting on overflow or division by 0.
* @param a a FixedPoint numerator.
* @param b a FixedPoint denominator.
* @return the quotient of `a` divided by `b`.
*/
function divAwayFromZero(Signed memory a, Signed memory b) internal pure returns (Signed memory) {
int256 aScaled = a.rawValue.mul(SFP_SCALING_FACTOR);
int256 divTowardsZero = aScaled.div(b.rawValue);
// Manual mod because SignedSafeMath doesn't support it.
int256 mod = aScaled % b.rawValue;
if (mod != 0) {
bool isResultPositive = isLessThan(a, 0) == isLessThan(b, 0);
int256 valueToAdd = isResultPositive ? int256(1) : int256(-1);
return Signed(divTowardsZero.add(valueToAdd));
} else {
return Signed(divTowardsZero);
}
}
/**
* @notice Divides one `Signed` by an unscaled int256 and "ceil's" the quotient, reverting on overflow or division by 0.
* @param a a FixedPoint numerator.
* @param b an int256 denominator.
* @return the quotient of `a` divided by `b`.
*/
function divAwayFromZero(Signed memory a, int256 b) internal pure returns (Signed memory) {
// Because it is possible that a quotient gets truncated, we can't just call "Signed(a.rawValue.div(b))"
// similarly to mulCeil with an int256 as the second parameter. Therefore we need to convert b into an Signed.
// This creates the possibility of overflow if b is very large.
return divAwayFromZero(a, fromUnscaledInt(b));
}
/**
* @notice Raises an `Signed` to the power of an unscaled uint256, reverting on overflow. E.g., `b=2` squares `a`.
* @dev This will "floor" the result.
* @param a a FixedPoint.Signed.
* @param b a uint256 (negative exponents are not allowed).
* @return output is `a` to the power of `b`.
*/
function pow(Signed memory a, uint256 b) internal pure returns (Signed memory output) {
output = fromUnscaledInt(1);
for (uint256 i = 0; i < b; i = i.add(1)) {
output = mul(output, a);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SignedSafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SignedSafeMath {
/**
* @dev Returns the multiplication of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
return a * b;
}
/**
* @dev Returns the integer division of two signed integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
return a / b;
}
/**
* @dev Returns the subtraction of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(int256 a, int256 b) internal pure returns (int256) {
return a - b;
}
/**
* @dev Returns the addition of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(int256 a, int256 b) internal pure returns (int256) {
return a + b;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/FixedPoint.sol";
import "../../common/implementation/Testable.sol";
import "../interfaces/OracleInterface.sol";
import "../interfaces/VotingInterface.sol";
// A mock oracle used for testing. Exports the voting & oracle interfaces and events that contain no ancillary data.
abstract contract VotingInterfaceTesting is OracleInterface, VotingInterface, Testable {
using FixedPoint for FixedPoint.Unsigned;
// Events, data structures and functions not exported in the base interfaces, used for testing.
event VoteCommitted(
address indexed voter,
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
bytes ancillaryData
);
event EncryptedVote(
address indexed voter,
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
bytes ancillaryData,
bytes encryptedVote
);
event VoteRevealed(
address indexed voter,
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
int256 price,
bytes ancillaryData,
uint256 numTokens
);
event RewardsRetrieved(
address indexed voter,
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
bytes ancillaryData,
uint256 numTokens
);
event PriceRequestAdded(uint256 indexed roundId, bytes32 indexed identifier, uint256 time);
event PriceResolved(
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
int256 price,
bytes ancillaryData
);
struct Round {
uint256 snapshotId; // Voting token snapshot ID for this round. 0 if no snapshot has been taken.
FixedPoint.Unsigned inflationRate; // Inflation rate set for this round.
FixedPoint.Unsigned gatPercentage; // Gat rate set for this round.
uint256 rewardsExpirationTime; // Time that rewards for this round can be claimed until.
}
// Represents the status a price request has.
enum RequestStatus {
NotRequested, // Was never requested.
Active, // Is being voted on in the current round.
Resolved, // Was resolved in a previous round.
Future // Is scheduled to be voted on in a future round.
}
// Only used as a return value in view methods -- never stored in the contract.
struct RequestState {
RequestStatus status;
uint256 lastVotingRound;
}
function rounds(uint256 roundId) public view virtual returns (Round memory);
function getPriceRequestStatuses(VotingInterface.PendingRequest[] memory requests)
public
view
virtual
returns (RequestState[] memory);
function getPendingPriceRequestsArray() external view virtual returns (bytes32[] memory);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "./Timer.sol";
/**
* @title Base class that provides time overrides, but only if being run in test mode.
*/
abstract contract Testable {
// If the contract is being run on the test network, then `timerAddress` will be the 0x0 address.
// Note: this variable should be set on construction and never modified.
address public timerAddress;
/**
* @notice Constructs the Testable contract. Called by child contracts.
* @param _timerAddress Contract that stores the current time in a testing environment.
* Must be set to 0x0 for production environments that use live time.
*/
constructor(address _timerAddress) {
timerAddress = _timerAddress;
}
/**
* @notice Reverts if not running in test mode.
*/
modifier onlyIfTest {
require(timerAddress != address(0x0));
_;
}
/**
* @notice Sets the current time.
* @dev Will revert if not running in test mode.
* @param time timestamp to set current Testable time to.
*/
function setCurrentTime(uint256 time) external onlyIfTest {
Timer(timerAddress).setCurrentTime(time);
}
/**
* @notice Gets the current time. Will return the last time set in `setCurrentTime` if running in test mode.
* Otherwise, it will return the block timestamp.
* @return uint for the current Testable timestamp.
*/
function getCurrentTime() public view returns (uint256) {
if (timerAddress != address(0x0)) {
return Timer(timerAddress).getCurrentTime();
} else {
return block.timestamp; // solhint-disable-line not-rely-on-time
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
/**
* @title Financial contract facing Oracle interface.
* @dev Interface used by financial contracts to interact with the Oracle. Voters will use a different interface.
*/
abstract contract OracleInterface {
/**
* @notice Enqueues a request (if a request isn't already present) for the given `identifier`, `time` pair.
* @dev Time must be in the past and the identifier must be supported.
* @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
* @param time unix timestamp for the price request.
*/
function requestPrice(bytes32 identifier, uint256 time) public virtual;
/**
* @notice Whether the price for `identifier` and `time` is available.
* @dev Time must be in the past and the identifier must be supported.
* @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
* @param time unix timestamp for the price request.
* @return bool if the DVM has resolved to a price for the given identifier and timestamp.
*/
function hasPrice(bytes32 identifier, uint256 time) public view virtual returns (bool);
/**
* @notice Gets the price for `identifier` and `time` if it has already been requested and resolved.
* @dev If the price is not available, the method reverts.
* @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
* @param time unix timestamp for the price request.
* @return int256 representing the resolved price for the given identifier and timestamp.
*/
function getPrice(bytes32 identifier, uint256 time) public view virtual returns (int256);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/FixedPoint.sol";
import "./VotingAncillaryInterface.sol";
/**
* @title Interface that voters must use to Vote on price request resolutions.
*/
abstract contract VotingInterface {
struct PendingRequest {
bytes32 identifier;
uint256 time;
}
// Captures the necessary data for making a commitment.
// Used as a parameter when making batch commitments.
// Not used as a data structure for storage.
struct Commitment {
bytes32 identifier;
uint256 time;
bytes32 hash;
bytes encryptedVote;
}
// Captures the necessary data for revealing a vote.
// Used as a parameter when making batch reveals.
// Not used as a data structure for storage.
struct Reveal {
bytes32 identifier;
uint256 time;
int256 price;
int256 salt;
}
/**
* @notice Commit a vote for a price request for `identifier` at `time`.
* @dev `identifier`, `time` must correspond to a price request that's currently in the commit phase.
* Commits can be changed.
* @dev Since transaction data is public, the salt will be revealed with the vote. While this is the system’s expected behavior,
* voters should never reuse salts. If someone else is able to guess the voted price and knows that a salt will be reused, then
* they can determine the vote pre-reveal.
* @param identifier uniquely identifies the committed vote. EG BTC/USD price pair.
* @param time unix timestamp of the price being voted on.
* @param hash keccak256 hash of the `price`, `salt`, voter `address`, `time`, current `roundId`, and `identifier`.
*/
function commitVote(
bytes32 identifier,
uint256 time,
bytes32 hash
) external virtual;
/**
* @notice Submit a batch of commits in a single transaction.
* @dev Using `encryptedVote` is optional. If included then commitment is stored on chain.
* Look at `project-root/common/Constants.js` for the tested maximum number of
* commitments that can fit in one transaction.
* @param commits array of structs that encapsulate an `identifier`, `time`, `hash` and optional `encryptedVote`.
*/
function batchCommit(Commitment[] memory commits) public virtual;
/**
* @notice commits a vote and logs an event with a data blob, typically an encrypted version of the vote
* @dev An encrypted version of the vote is emitted in an event `EncryptedVote` to allow off-chain infrastructure to
* retrieve the commit. The contents of `encryptedVote` are never used on chain: it is purely for convenience.
* @param identifier unique price pair identifier. Eg: BTC/USD price pair.
* @param time unix timestamp of for the price request.
* @param hash keccak256 hash of the price you want to vote for and a `int256 salt`.
* @param encryptedVote offchain encrypted blob containing the voters amount, time and salt.
*/
function commitAndEmitEncryptedVote(
bytes32 identifier,
uint256 time,
bytes32 hash,
bytes memory encryptedVote
) public virtual;
/**
* @notice snapshot the current round's token balances and lock in the inflation rate and GAT.
* @dev This function can be called multiple times but each round will only every have one snapshot at the
* time of calling `_freezeRoundVariables`.
* @param signature signature required to prove caller is an EOA to prevent flash loans from being included in the
* snapshot.
*/
function snapshotCurrentRound(bytes calldata signature) external virtual;
/**
* @notice Reveal a previously committed vote for `identifier` at `time`.
* @dev The revealed `price`, `salt`, `address`, `time`, `roundId`, and `identifier`, must hash to the latest `hash`
* that `commitVote()` was called with. Only the committer can reveal their vote.
* @param identifier voted on in the commit phase. EG BTC/USD price pair.
* @param time specifies the unix timestamp of the price is being voted on.
* @param price voted on during the commit phase.
* @param salt value used to hide the commitment price during the commit phase.
*/
function revealVote(
bytes32 identifier,
uint256 time,
int256 price,
int256 salt
) public virtual;
/**
* @notice Reveal multiple votes in a single transaction.
* Look at `project-root/common/Constants.js` for the tested maximum number of reveals.
* that can fit in one transaction.
* @dev For more information on reveals, review the comment for `revealVote`.
* @param reveals array of the Reveal struct which contains an identifier, time, price and salt.
*/
function batchReveal(Reveal[] memory reveals) public virtual;
/**
* @notice Gets the queries that are being voted on this round.
* @return pendingRequests `PendingRequest` array containing identifiers
* and timestamps for all pending requests.
*/
function getPendingRequests()
external
view
virtual
returns (VotingAncillaryInterface.PendingRequestAncillary[] memory);
/**
* @notice Returns the current voting phase, as a function of the current time.
* @return Phase to indicate the current phase. Either { Commit, Reveal, NUM_PHASES_PLACEHOLDER }.
*/
function getVotePhase() external view virtual returns (VotingAncillaryInterface.Phase);
/**
* @notice Returns the current round ID, as a function of the current time.
* @return uint256 representing the unique round ID.
*/
function getCurrentRoundId() external view virtual returns (uint256);
/**
* @notice Retrieves rewards owed for a set of resolved price requests.
* @dev Can only retrieve rewards if calling for a valid round and if the
* call is done within the timeout threshold (not expired).
* @param voterAddress voter for which rewards will be retrieved. Does not have to be the caller.
* @param roundId the round from which voting rewards will be retrieved from.
* @param toRetrieve array of PendingRequests which rewards are retrieved from.
* @return total amount of rewards returned to the voter.
*/
function retrieveRewards(
address voterAddress,
uint256 roundId,
PendingRequest[] memory toRetrieve
) public virtual returns (FixedPoint.Unsigned memory);
// Voting Owner functions.
/**
* @notice Disables this Voting contract in favor of the migrated one.
* @dev Can only be called by the contract owner.
* @param newVotingAddress the newly migrated contract address.
*/
function setMigrated(address newVotingAddress) external virtual;
/**
* @notice Resets the inflation rate. Note: this change only applies to rounds that have not yet begun.
* @dev This method is public because calldata structs are not currently supported by solidity.
* @param newInflationRate sets the next round's inflation rate.
*/
function setInflationRate(FixedPoint.Unsigned memory newInflationRate) public virtual;
/**
* @notice Resets the Gat percentage. Note: this change only applies to rounds that have not yet begun.
* @dev This method is public because calldata structs are not currently supported by solidity.
* @param newGatPercentage sets the next round's Gat percentage.
*/
function setGatPercentage(FixedPoint.Unsigned memory newGatPercentage) public virtual;
/**
* @notice Resets the rewards expiration timeout.
* @dev This change only applies to rounds that have not yet begun.
* @param NewRewardsExpirationTimeout how long a caller can wait before choosing to withdraw their rewards.
*/
function setRewardsExpirationTimeout(uint256 NewRewardsExpirationTimeout) public virtual;
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
/**
* @title Universal store of current contract time for testing environments.
*/
contract Timer {
uint256 private currentTime;
constructor() {
currentTime = block.timestamp; // solhint-disable-line not-rely-on-time
}
/**
* @notice Sets the current time.
* @dev Will revert if not running in test mode.
* @param time timestamp to set `currentTime` to.
*/
function setCurrentTime(uint256 time) external {
currentTime = time;
}
/**
* @notice Gets the current time. Will return the last time set in `setCurrentTime` if running in test mode.
* Otherwise, it will return the block timestamp.
* @return uint256 for the current Testable timestamp.
*/
function getCurrentTime() public view returns (uint256) {
return currentTime;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/FixedPoint.sol";
/**
* @title Interface that voters must use to Vote on price request resolutions.
*/
abstract contract VotingAncillaryInterface {
struct PendingRequestAncillary {
bytes32 identifier;
uint256 time;
bytes ancillaryData;
}
// Captures the necessary data for making a commitment.
// Used as a parameter when making batch commitments.
// Not used as a data structure for storage.
struct CommitmentAncillary {
bytes32 identifier;
uint256 time;
bytes ancillaryData;
bytes32 hash;
bytes encryptedVote;
}
// Captures the necessary data for revealing a vote.
// Used as a parameter when making batch reveals.
// Not used as a data structure for storage.
struct RevealAncillary {
bytes32 identifier;
uint256 time;
int256 price;
bytes ancillaryData;
int256 salt;
}
// Note: the phases must be in order. Meaning the first enum value must be the first phase, etc.
// `NUM_PHASES_PLACEHOLDER` is to get the number of phases. It isn't an actual phase, and it should always be last.
enum Phase { Commit, Reveal, NUM_PHASES_PLACEHOLDER }
/**
* @notice Commit a vote for a price request for `identifier` at `time`.
* @dev `identifier`, `time` must correspond to a price request that's currently in the commit phase.
* Commits can be changed.
* @dev Since transaction data is public, the salt will be revealed with the vote. While this is the system’s expected behavior,
* voters should never reuse salts. If someone else is able to guess the voted price and knows that a salt will be reused, then
* they can determine the vote pre-reveal.
* @param identifier uniquely identifies the committed vote. EG BTC/USD price pair.
* @param time unix timestamp of the price being voted on.
* @param hash keccak256 hash of the `price`, `salt`, voter `address`, `time`, current `roundId`, and `identifier`.
*/
function commitVote(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData,
bytes32 hash
) public virtual;
/**
* @notice Submit a batch of commits in a single transaction.
* @dev Using `encryptedVote` is optional. If included then commitment is stored on chain.
* Look at `project-root/common/Constants.js` for the tested maximum number of
* commitments that can fit in one transaction.
* @param commits array of structs that encapsulate an `identifier`, `time`, `hash` and optional `encryptedVote`.
*/
function batchCommit(CommitmentAncillary[] memory commits) public virtual;
/**
* @notice commits a vote and logs an event with a data blob, typically an encrypted version of the vote
* @dev An encrypted version of the vote is emitted in an event `EncryptedVote` to allow off-chain infrastructure to
* retrieve the commit. The contents of `encryptedVote` are never used on chain: it is purely for convenience.
* @param identifier unique price pair identifier. Eg: BTC/USD price pair.
* @param time unix timestamp of for the price request.
* @param hash keccak256 hash of the price you want to vote for and a `int256 salt`.
* @param encryptedVote offchain encrypted blob containing the voters amount, time and salt.
*/
function commitAndEmitEncryptedVote(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData,
bytes32 hash,
bytes memory encryptedVote
) public virtual;
/**
* @notice snapshot the current round's token balances and lock in the inflation rate and GAT.
* @dev This function can be called multiple times but each round will only every have one snapshot at the
* time of calling `_freezeRoundVariables`.
* @param signature signature required to prove caller is an EOA to prevent flash loans from being included in the
* snapshot.
*/
function snapshotCurrentRound(bytes calldata signature) external virtual;
/**
* @notice Reveal a previously committed vote for `identifier` at `time`.
* @dev The revealed `price`, `salt`, `address`, `time`, `roundId`, and `identifier`, must hash to the latest `hash`
* that `commitVote()` was called with. Only the committer can reveal their vote.
* @param identifier voted on in the commit phase. EG BTC/USD price pair.
* @param time specifies the unix timestamp of the price is being voted on.
* @param price voted on during the commit phase.
* @param salt value used to hide the commitment price during the commit phase.
*/
function revealVote(
bytes32 identifier,
uint256 time,
int256 price,
bytes memory ancillaryData,
int256 salt
) public virtual;
/**
* @notice Reveal multiple votes in a single transaction.
* Look at `project-root/common/Constants.js` for the tested maximum number of reveals.
* that can fit in one transaction.
* @dev For more information on reveals, review the comment for `revealVote`.
* @param reveals array of the Reveal struct which contains an identifier, time, price and salt.
*/
function batchReveal(RevealAncillary[] memory reveals) public virtual;
/**
* @notice Gets the queries that are being voted on this round.
* @return pendingRequests `PendingRequest` array containing identifiers
* and timestamps for all pending requests.
*/
function getPendingRequests() external view virtual returns (PendingRequestAncillary[] memory);
/**
* @notice Returns the current voting phase, as a function of the current time.
* @return Phase to indicate the current phase. Either { Commit, Reveal, NUM_PHASES_PLACEHOLDER }.
*/
function getVotePhase() external view virtual returns (Phase);
/**
* @notice Returns the current round ID, as a function of the current time.
* @return uint256 representing the unique round ID.
*/
function getCurrentRoundId() external view virtual returns (uint256);
/**
* @notice Retrieves rewards owed for a set of resolved price requests.
* @dev Can only retrieve rewards if calling for a valid round and if the
* call is done within the timeout threshold (not expired).
* @param voterAddress voter for which rewards will be retrieved. Does not have to be the caller.
* @param roundId the round from which voting rewards will be retrieved from.
* @param toRetrieve array of PendingRequests which rewards are retrieved from.
* @return total amount of rewards returned to the voter.
*/
function retrieveRewards(
address voterAddress,
uint256 roundId,
PendingRequestAncillary[] memory toRetrieve
) public virtual returns (FixedPoint.Unsigned memory);
// Voting Owner functions.
/**
* @notice Disables this Voting contract in favor of the migrated one.
* @dev Can only be called by the contract owner.
* @param newVotingAddress the newly migrated contract address.
*/
function setMigrated(address newVotingAddress) external virtual;
/**
* @notice Resets the inflation rate. Note: this change only applies to rounds that have not yet begun.
* @dev This method is public because calldata structs are not currently supported by solidity.
* @param newInflationRate sets the next round's inflation rate.
*/
function setInflationRate(FixedPoint.Unsigned memory newInflationRate) public virtual;
/**
* @notice Resets the Gat percentage. Note: this change only applies to rounds that have not yet begun.
* @dev This method is public because calldata structs are not currently supported by solidity.
* @param newGatPercentage sets the next round's Gat percentage.
*/
function setGatPercentage(FixedPoint.Unsigned memory newGatPercentage) public virtual;
/**
* @notice Resets the rewards expiration timeout.
* @dev This change only applies to rounds that have not yet begun.
* @param NewRewardsExpirationTimeout how long a caller can wait before choosing to withdraw their rewards.
*/
function setRewardsExpirationTimeout(uint256 NewRewardsExpirationTimeout) public virtual;
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/FixedPoint.sol";
import "../../common/implementation/Testable.sol";
import "../interfaces/FinderInterface.sol";
import "../interfaces/OracleInterface.sol";
import "../interfaces/OracleAncillaryInterface.sol";
import "../interfaces/VotingInterface.sol";
import "../interfaces/VotingAncillaryInterface.sol";
import "../interfaces/IdentifierWhitelistInterface.sol";
import "./Registry.sol";
import "./ResultComputation.sol";
import "./VoteTiming.sol";
import "./VotingToken.sol";
import "./Constants.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
/**
* @title Voting system for Oracle.
* @dev Handles receiving and resolving price requests via a commit-reveal voting scheme.
*/
contract Voting is
Testable,
Ownable,
OracleInterface,
OracleAncillaryInterface, // Interface to support ancillary data with price requests.
VotingInterface,
VotingAncillaryInterface // Interface to support ancillary data with voting rounds.
{
using FixedPoint for FixedPoint.Unsigned;
using SafeMath for uint256;
using VoteTiming for VoteTiming.Data;
using ResultComputation for ResultComputation.Data;
/****************************************
* VOTING DATA STRUCTURES *
****************************************/
// Identifies a unique price request for which the Oracle will always return the same value.
// Tracks ongoing votes as well as the result of the vote.
struct PriceRequest {
bytes32 identifier;
uint256 time;
// A map containing all votes for this price in various rounds.
mapping(uint256 => VoteInstance) voteInstances;
// If in the past, this was the voting round where this price was resolved. If current or the upcoming round,
// this is the voting round where this price will be voted on, but not necessarily resolved.
uint256 lastVotingRound;
// The index in the `pendingPriceRequests` that references this PriceRequest. A value of UINT_MAX means that
// this PriceRequest is resolved and has been cleaned up from `pendingPriceRequests`.
uint256 index;
bytes ancillaryData;
}
struct VoteInstance {
// Maps (voterAddress) to their submission.
mapping(address => VoteSubmission) voteSubmissions;
// The data structure containing the computed voting results.
ResultComputation.Data resultComputation;
}
struct VoteSubmission {
// A bytes32 of `0` indicates no commit or a commit that was already revealed.
bytes32 commit;
// The hash of the value that was revealed.
// Note: this is only used for computation of rewards.
bytes32 revealHash;
}
struct Round {
uint256 snapshotId; // Voting token snapshot ID for this round. 0 if no snapshot has been taken.
FixedPoint.Unsigned inflationRate; // Inflation rate set for this round.
FixedPoint.Unsigned gatPercentage; // Gat rate set for this round.
uint256 rewardsExpirationTime; // Time that rewards for this round can be claimed until.
}
// Represents the status a price request has.
enum RequestStatus {
NotRequested, // Was never requested.
Active, // Is being voted on in the current round.
Resolved, // Was resolved in a previous round.
Future // Is scheduled to be voted on in a future round.
}
// Only used as a return value in view methods -- never stored in the contract.
struct RequestState {
RequestStatus status;
uint256 lastVotingRound;
}
/****************************************
* INTERNAL TRACKING *
****************************************/
// Maps round numbers to the rounds.
mapping(uint256 => Round) public rounds;
// Maps price request IDs to the PriceRequest struct.
mapping(bytes32 => PriceRequest) private priceRequests;
// Price request ids for price requests that haven't yet been marked as resolved.
// These requests may be for future rounds.
bytes32[] internal pendingPriceRequests;
VoteTiming.Data public voteTiming;
// Percentage of the total token supply that must be used in a vote to
// create a valid price resolution. 1 == 100%.
FixedPoint.Unsigned public gatPercentage;
// Global setting for the rate of inflation per vote. This is the percentage of the snapshotted total supply that
// should be split among the correct voters.
// Note: this value is used to set per-round inflation at the beginning of each round. 1 = 100%.
FixedPoint.Unsigned public inflationRate;
// Time in seconds from the end of the round in which a price request is
// resolved that voters can still claim their rewards.
uint256 public rewardsExpirationTimeout;
// Reference to the voting token.
VotingToken public votingToken;
// Reference to the Finder.
FinderInterface private finder;
// If non-zero, this contract has been migrated to this address. All voters and
// financial contracts should query the new address only.
address public migratedAddress;
// Max value of an unsigned integer.
uint256 private constant UINT_MAX = ~uint256(0);
// Max length in bytes of ancillary data that can be appended to a price request.
// As of December 2020, the current Ethereum gas limit is 12.5 million. This requestPrice function's gas primarily
// comes from computing a Keccak-256 hash in _encodePriceRequest and writing a new PriceRequest to
// storage. We have empirically determined an ancillary data limit of 8192 bytes that keeps this function
// well within the gas limit at ~8 million gas. To learn more about the gas limit and EVM opcode costs go here:
// - https://etherscan.io/chart/gaslimit
// - https://github.com/djrtwo/evm-opcode-gas-costs
uint256 public constant ancillaryBytesLimit = 8192;
bytes32 public snapshotMessageHash = ECDSA.toEthSignedMessageHash(keccak256(bytes("Sign For Snapshot")));
/***************************************
* EVENTS *
****************************************/
event VoteCommitted(
address indexed voter,
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
bytes ancillaryData
);
event EncryptedVote(
address indexed voter,
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
bytes ancillaryData,
bytes encryptedVote
);
event VoteRevealed(
address indexed voter,
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
int256 price,
bytes ancillaryData,
uint256 numTokens
);
event RewardsRetrieved(
address indexed voter,
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
bytes ancillaryData,
uint256 numTokens
);
event PriceRequestAdded(uint256 indexed roundId, bytes32 indexed identifier, uint256 time);
event PriceResolved(
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
int256 price,
bytes ancillaryData
);
/**
* @notice Construct the Voting contract.
* @param _phaseLength length of the commit and reveal phases in seconds.
* @param _gatPercentage of the total token supply that must be used in a vote to create a valid price resolution.
* @param _inflationRate percentage inflation per round used to increase token supply of correct voters.
* @param _rewardsExpirationTimeout timeout, in seconds, within which rewards must be claimed.
* @param _votingToken address of the UMA token contract used to commit votes.
* @param _finder keeps track of all contracts within the system based on their interfaceName.
* @param _timerAddress Contract that stores the current time in a testing environment.
* Must be set to 0x0 for production environments that use live time.
*/
constructor(
uint256 _phaseLength,
FixedPoint.Unsigned memory _gatPercentage,
FixedPoint.Unsigned memory _inflationRate,
uint256 _rewardsExpirationTimeout,
address _votingToken,
address _finder,
address _timerAddress
) Testable(_timerAddress) {
voteTiming.init(_phaseLength);
require(_gatPercentage.isLessThanOrEqual(1), "GAT percentage must be <= 100%");
gatPercentage = _gatPercentage;
inflationRate = _inflationRate;
votingToken = VotingToken(_votingToken);
finder = FinderInterface(_finder);
rewardsExpirationTimeout = _rewardsExpirationTimeout;
}
/***************************************
MODIFIERS
****************************************/
modifier onlyRegisteredContract() {
if (migratedAddress != address(0)) {
require(msg.sender == migratedAddress, "Caller must be migrated address");
} else {
Registry registry = Registry(finder.getImplementationAddress(OracleInterfaces.Registry));
require(registry.isContractRegistered(msg.sender), "Called must be registered");
}
_;
}
modifier onlyIfNotMigrated() {
require(migratedAddress == address(0), "Only call this if not migrated");
_;
}
/****************************************
* PRICE REQUEST AND ACCESS FUNCTIONS *
****************************************/
/**
* @notice Enqueues a request (if a request isn't already present) for the given `identifier`, `time` pair.
* @dev Time must be in the past and the identifier must be supported. The length of the ancillary data
* is limited such that this method abides by the EVM transaction gas limit.
* @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
* @param time unix timestamp for the price request.
* @param ancillaryData arbitrary data appended to a price request to give the voters more info from the caller.
*/
function requestPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public override onlyRegisteredContract() {
uint256 blockTime = getCurrentTime();
require(time <= blockTime, "Can only request in past");
require(_getIdentifierWhitelist().isIdentifierSupported(identifier), "Unsupported identifier request");
require(ancillaryData.length <= ancillaryBytesLimit, "Invalid ancillary data");
bytes32 priceRequestId = _encodePriceRequest(identifier, time, ancillaryData);
PriceRequest storage priceRequest = priceRequests[priceRequestId];
uint256 currentRoundId = voteTiming.computeCurrentRoundId(blockTime);
RequestStatus requestStatus = _getRequestStatus(priceRequest, currentRoundId);
if (requestStatus == RequestStatus.NotRequested) {
// Price has never been requested.
// Price requests always go in the next round, so add 1 to the computed current round.
uint256 nextRoundId = currentRoundId.add(1);
PriceRequest storage newPriceRequest = priceRequests[priceRequestId];
newPriceRequest.identifier = identifier;
newPriceRequest.time = time;
newPriceRequest.lastVotingRound = nextRoundId;
newPriceRequest.index = pendingPriceRequests.length;
newPriceRequest.ancillaryData = ancillaryData;
pendingPriceRequests.push(priceRequestId);
emit PriceRequestAdded(nextRoundId, identifier, time);
}
}
// Overloaded method to enable short term backwards compatibility. Will be deprecated in the next DVM version.
function requestPrice(bytes32 identifier, uint256 time) public override {
requestPrice(identifier, time, "");
}
/**
* @notice Whether the price for `identifier` and `time` is available.
* @dev Time must be in the past and the identifier must be supported.
* @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
* @param time unix timestamp of for the price request.
* @param ancillaryData arbitrary data appended to a price request to give the voters more info from the caller.
* @return _hasPrice bool if the DVM has resolved to a price for the given identifier and timestamp.
*/
function hasPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public view override onlyRegisteredContract() returns (bool) {
(bool _hasPrice, , ) = _getPriceOrError(identifier, time, ancillaryData);
return _hasPrice;
}
// Overloaded method to enable short term backwards compatibility. Will be deprecated in the next DVM version.
function hasPrice(bytes32 identifier, uint256 time) public view override returns (bool) {
return hasPrice(identifier, time, "");
}
/**
* @notice Gets the price for `identifier` and `time` if it has already been requested and resolved.
* @dev If the price is not available, the method reverts.
* @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
* @param time unix timestamp of for the price request.
* @param ancillaryData arbitrary data appended to a price request to give the voters more info from the caller.
* @return int256 representing the resolved price for the given identifier and timestamp.
*/
function getPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public view override onlyRegisteredContract() returns (int256) {
(bool _hasPrice, int256 price, string memory message) = _getPriceOrError(identifier, time, ancillaryData);
// If the price wasn't available, revert with the provided message.
require(_hasPrice, message);
return price;
}
// Overloaded method to enable short term backwards compatibility. Will be deprecated in the next DVM version.
function getPrice(bytes32 identifier, uint256 time) public view override returns (int256) {
return getPrice(identifier, time, "");
}
/**
* @notice Gets the status of a list of price requests, identified by their identifier and time.
* @dev If the status for a particular request is NotRequested, the lastVotingRound will always be 0.
* @param requests array of type PendingRequest which includes an identifier and timestamp for each request.
* @return requestStates a list, in the same order as the input list, giving the status of each of the specified price requests.
*/
function getPriceRequestStatuses(PendingRequestAncillary[] memory requests)
public
view
returns (RequestState[] memory)
{
RequestState[] memory requestStates = new RequestState[](requests.length);
uint256 currentRoundId = voteTiming.computeCurrentRoundId(getCurrentTime());
for (uint256 i = 0; i < requests.length; i++) {
PriceRequest storage priceRequest =
_getPriceRequest(requests[i].identifier, requests[i].time, requests[i].ancillaryData);
RequestStatus status = _getRequestStatus(priceRequest, currentRoundId);
// If it's an active request, its true lastVotingRound is the current one, even if it hasn't been updated.
if (status == RequestStatus.Active) {
requestStates[i].lastVotingRound = currentRoundId;
} else {
requestStates[i].lastVotingRound = priceRequest.lastVotingRound;
}
requestStates[i].status = status;
}
return requestStates;
}
// Overloaded method to enable short term backwards compatibility. Will be deprecated in the next DVM version.
function getPriceRequestStatuses(PendingRequest[] memory requests) public view returns (RequestState[] memory) {
PendingRequestAncillary[] memory requestsAncillary = new PendingRequestAncillary[](requests.length);
for (uint256 i = 0; i < requests.length; i++) {
requestsAncillary[i].identifier = requests[i].identifier;
requestsAncillary[i].time = requests[i].time;
requestsAncillary[i].ancillaryData = "";
}
return getPriceRequestStatuses(requestsAncillary);
}
/****************************************
* VOTING FUNCTIONS *
****************************************/
/**
* @notice Commit a vote for a price request for `identifier` at `time`.
* @dev `identifier`, `time` must correspond to a price request that's currently in the commit phase.
* Commits can be changed.
* @dev Since transaction data is public, the salt will be revealed with the vote. While this is the system’s expected behavior,
* voters should never reuse salts. If someone else is able to guess the voted price and knows that a salt will be reused, then
* they can determine the vote pre-reveal.
* @param identifier uniquely identifies the committed vote. EG BTC/USD price pair.
* @param time unix timestamp of the price being voted on.
* @param ancillaryData arbitrary data appended to a price request to give the voters more info from the caller.
* @param hash keccak256 hash of the `price`, `salt`, voter `address`, `time`, current `roundId`, and `identifier`.
*/
function commitVote(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData,
bytes32 hash
) public override onlyIfNotMigrated() {
require(hash != bytes32(0), "Invalid provided hash");
// Current time is required for all vote timing queries.
uint256 blockTime = getCurrentTime();
require(
voteTiming.computeCurrentPhase(blockTime) == VotingAncillaryInterface.Phase.Commit,
"Cannot commit in reveal phase"
);
// At this point, the computed and last updated round ID should be equal.
uint256 currentRoundId = voteTiming.computeCurrentRoundId(blockTime);
PriceRequest storage priceRequest = _getPriceRequest(identifier, time, ancillaryData);
require(
_getRequestStatus(priceRequest, currentRoundId) == RequestStatus.Active,
"Cannot commit inactive request"
);
priceRequest.lastVotingRound = currentRoundId;
VoteInstance storage voteInstance = priceRequest.voteInstances[currentRoundId];
voteInstance.voteSubmissions[msg.sender].commit = hash;
emit VoteCommitted(msg.sender, currentRoundId, identifier, time, ancillaryData);
}
// Overloaded method to enable short term backwards compatibility. Will be deprecated in the next DVM version.
function commitVote(
bytes32 identifier,
uint256 time,
bytes32 hash
) public override onlyIfNotMigrated() {
commitVote(identifier, time, "", hash);
}
/**
* @notice Snapshot the current round's token balances and lock in the inflation rate and GAT.
* @dev This function can be called multiple times, but only the first call per round into this function or `revealVote`
* will create the round snapshot. Any later calls will be a no-op. Will revert unless called during reveal period.
* @param signature signature required to prove caller is an EOA to prevent flash loans from being included in the
* snapshot.
*/
function snapshotCurrentRound(bytes calldata signature)
external
override(VotingInterface, VotingAncillaryInterface)
onlyIfNotMigrated()
{
uint256 blockTime = getCurrentTime();
require(voteTiming.computeCurrentPhase(blockTime) == Phase.Reveal, "Only snapshot in reveal phase");
// Require public snapshot require signature to ensure caller is an EOA.
require(ECDSA.recover(snapshotMessageHash, signature) == msg.sender, "Signature must match sender");
uint256 roundId = voteTiming.computeCurrentRoundId(blockTime);
_freezeRoundVariables(roundId);
}
/**
* @notice Reveal a previously committed vote for `identifier` at `time`.
* @dev The revealed `price`, `salt`, `address`, `time`, `roundId`, and `identifier`, must hash to the latest `hash`
* that `commitVote()` was called with. Only the committer can reveal their vote.
* @param identifier voted on in the commit phase. EG BTC/USD price pair.
* @param time specifies the unix timestamp of the price being voted on.
* @param price voted on during the commit phase.
* @param ancillaryData arbitrary data appended to a price request to give the voters more info from the caller.
* @param salt value used to hide the commitment price during the commit phase.
*/
function revealVote(
bytes32 identifier,
uint256 time,
int256 price,
bytes memory ancillaryData,
int256 salt
) public override onlyIfNotMigrated() {
require(voteTiming.computeCurrentPhase(getCurrentTime()) == Phase.Reveal, "Cannot reveal in commit phase");
// Note: computing the current round is required to disallow people from revealing an old commit after the round is over.
uint256 roundId = voteTiming.computeCurrentRoundId(getCurrentTime());
PriceRequest storage priceRequest = _getPriceRequest(identifier, time, ancillaryData);
VoteInstance storage voteInstance = priceRequest.voteInstances[roundId];
VoteSubmission storage voteSubmission = voteInstance.voteSubmissions[msg.sender];
// Scoping to get rid of a stack too deep error.
{
// 0 hashes are disallowed in the commit phase, so they indicate a different error.
// Cannot reveal an uncommitted or previously revealed hash
require(voteSubmission.commit != bytes32(0), "Invalid hash reveal");
require(
keccak256(abi.encodePacked(price, salt, msg.sender, time, ancillaryData, roundId, identifier)) ==
voteSubmission.commit,
"Revealed data != commit hash"
);
// To protect against flash loans, we require snapshot be validated as EOA.
require(rounds[roundId].snapshotId != 0, "Round has no snapshot");
}
// Get the frozen snapshotId
uint256 snapshotId = rounds[roundId].snapshotId;
delete voteSubmission.commit;
// Get the voter's snapshotted balance. Since balances are returned pre-scaled by 10**18, we can directly
// initialize the Unsigned value with the returned uint.
FixedPoint.Unsigned memory balance = FixedPoint.Unsigned(votingToken.balanceOfAt(msg.sender, snapshotId));
// Set the voter's submission.
voteSubmission.revealHash = keccak256(abi.encode(price));
// Add vote to the results.
voteInstance.resultComputation.addVote(price, balance);
emit VoteRevealed(msg.sender, roundId, identifier, time, price, ancillaryData, balance.rawValue);
}
// Overloaded method to enable short term backwards compatibility. Will be deprecated in the next DVM version.
function revealVote(
bytes32 identifier,
uint256 time,
int256 price,
int256 salt
) public override {
revealVote(identifier, time, price, "", salt);
}
/**
* @notice commits a vote and logs an event with a data blob, typically an encrypted version of the vote
* @dev An encrypted version of the vote is emitted in an event `EncryptedVote` to allow off-chain infrastructure to
* retrieve the commit. The contents of `encryptedVote` are never used on chain: it is purely for convenience.
* @param identifier unique price pair identifier. Eg: BTC/USD price pair.
* @param time unix timestamp of for the price request.
* @param ancillaryData arbitrary data appended to a price request to give the voters more info from the caller.
* @param hash keccak256 hash of the price you want to vote for and a `int256 salt`.
* @param encryptedVote offchain encrypted blob containing the voters amount, time and salt.
*/
function commitAndEmitEncryptedVote(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData,
bytes32 hash,
bytes memory encryptedVote
) public override {
commitVote(identifier, time, ancillaryData, hash);
uint256 roundId = voteTiming.computeCurrentRoundId(getCurrentTime());
emit EncryptedVote(msg.sender, roundId, identifier, time, ancillaryData, encryptedVote);
}
// Overloaded method to enable short term backwards compatibility. Will be deprecated in the next DVM version.
function commitAndEmitEncryptedVote(
bytes32 identifier,
uint256 time,
bytes32 hash,
bytes memory encryptedVote
) public override {
commitVote(identifier, time, "", hash);
commitAndEmitEncryptedVote(identifier, time, "", hash, encryptedVote);
}
/**
* @notice Submit a batch of commits in a single transaction.
* @dev Using `encryptedVote` is optional. If included then commitment is emitted in an event.
* Look at `project-root/common/Constants.js` for the tested maximum number of
* commitments that can fit in one transaction.
* @param commits struct to encapsulate an `identifier`, `time`, `hash` and optional `encryptedVote`.
*/
function batchCommit(CommitmentAncillary[] memory commits) public override {
for (uint256 i = 0; i < commits.length; i++) {
if (commits[i].encryptedVote.length == 0) {
commitVote(commits[i].identifier, commits[i].time, commits[i].ancillaryData, commits[i].hash);
} else {
commitAndEmitEncryptedVote(
commits[i].identifier,
commits[i].time,
commits[i].ancillaryData,
commits[i].hash,
commits[i].encryptedVote
);
}
}
}
// Overloaded method to enable short term backwards compatibility. Will be deprecated in the next DVM version.
function batchCommit(Commitment[] memory commits) public override {
CommitmentAncillary[] memory commitsAncillary = new CommitmentAncillary[](commits.length);
for (uint256 i = 0; i < commits.length; i++) {
commitsAncillary[i].identifier = commits[i].identifier;
commitsAncillary[i].time = commits[i].time;
commitsAncillary[i].ancillaryData = "";
commitsAncillary[i].hash = commits[i].hash;
commitsAncillary[i].encryptedVote = commits[i].encryptedVote;
}
batchCommit(commitsAncillary);
}
/**
* @notice Reveal multiple votes in a single transaction.
* Look at `project-root/common/Constants.js` for the tested maximum number of reveals.
* that can fit in one transaction.
* @dev For more info on reveals, review the comment for `revealVote`.
* @param reveals array of the Reveal struct which contains an identifier, time, price and salt.
*/
function batchReveal(RevealAncillary[] memory reveals) public override {
for (uint256 i = 0; i < reveals.length; i++) {
revealVote(
reveals[i].identifier,
reveals[i].time,
reveals[i].price,
reveals[i].ancillaryData,
reveals[i].salt
);
}
}
// Overloaded method to enable short term backwards compatibility. Will be deprecated in the next DVM version.
function batchReveal(Reveal[] memory reveals) public override {
RevealAncillary[] memory revealsAncillary = new RevealAncillary[](reveals.length);
for (uint256 i = 0; i < reveals.length; i++) {
revealsAncillary[i].identifier = reveals[i].identifier;
revealsAncillary[i].time = reveals[i].time;
revealsAncillary[i].price = reveals[i].price;
revealsAncillary[i].ancillaryData = "";
revealsAncillary[i].salt = reveals[i].salt;
}
batchReveal(revealsAncillary);
}
/**
* @notice Retrieves rewards owed for a set of resolved price requests.
* @dev Can only retrieve rewards if calling for a valid round and if the call is done within the timeout threshold
* (not expired). Note that a named return value is used here to avoid a stack to deep error.
* @param voterAddress voter for which rewards will be retrieved. Does not have to be the caller.
* @param roundId the round from which voting rewards will be retrieved from.
* @param toRetrieve array of PendingRequests which rewards are retrieved from.
* @return totalRewardToIssue total amount of rewards returned to the voter.
*/
function retrieveRewards(
address voterAddress,
uint256 roundId,
PendingRequestAncillary[] memory toRetrieve
) public override returns (FixedPoint.Unsigned memory totalRewardToIssue) {
if (migratedAddress != address(0)) {
require(msg.sender == migratedAddress, "Can only call from migrated");
}
require(roundId < voteTiming.computeCurrentRoundId(getCurrentTime()), "Invalid roundId");
Round storage round = rounds[roundId];
bool isExpired = getCurrentTime() > round.rewardsExpirationTime;
FixedPoint.Unsigned memory snapshotBalance =
FixedPoint.Unsigned(votingToken.balanceOfAt(voterAddress, round.snapshotId));
// Compute the total amount of reward that will be issued for each of the votes in the round.
FixedPoint.Unsigned memory snapshotTotalSupply =
FixedPoint.Unsigned(votingToken.totalSupplyAt(round.snapshotId));
FixedPoint.Unsigned memory totalRewardPerVote = round.inflationRate.mul(snapshotTotalSupply);
// Keep track of the voter's accumulated token reward.
totalRewardToIssue = FixedPoint.Unsigned(0);
for (uint256 i = 0; i < toRetrieve.length; i++) {
PriceRequest storage priceRequest =
_getPriceRequest(toRetrieve[i].identifier, toRetrieve[i].time, toRetrieve[i].ancillaryData);
VoteInstance storage voteInstance = priceRequest.voteInstances[priceRequest.lastVotingRound];
// Only retrieve rewards for votes resolved in same round
require(priceRequest.lastVotingRound == roundId, "Retrieve for votes same round");
_resolvePriceRequest(priceRequest, voteInstance);
if (voteInstance.voteSubmissions[voterAddress].revealHash == 0) {
continue;
} else if (isExpired) {
// Emit a 0 token retrieval on expired rewards.
emit RewardsRetrieved(
voterAddress,
roundId,
toRetrieve[i].identifier,
toRetrieve[i].time,
toRetrieve[i].ancillaryData,
0
);
} else if (
voteInstance.resultComputation.wasVoteCorrect(voteInstance.voteSubmissions[voterAddress].revealHash)
) {
// The price was successfully resolved during the voter's last voting round, the voter revealed
// and was correct, so they are eligible for a reward.
// Compute the reward and add to the cumulative reward.
FixedPoint.Unsigned memory reward =
snapshotBalance.mul(totalRewardPerVote).div(
voteInstance.resultComputation.getTotalCorrectlyVotedTokens()
);
totalRewardToIssue = totalRewardToIssue.add(reward);
// Emit reward retrieval for this vote.
emit RewardsRetrieved(
voterAddress,
roundId,
toRetrieve[i].identifier,
toRetrieve[i].time,
toRetrieve[i].ancillaryData,
reward.rawValue
);
} else {
// Emit a 0 token retrieval on incorrect votes.
emit RewardsRetrieved(
voterAddress,
roundId,
toRetrieve[i].identifier,
toRetrieve[i].time,
toRetrieve[i].ancillaryData,
0
);
}
// Delete the submission to capture any refund and clean up storage.
delete voteInstance.voteSubmissions[voterAddress].revealHash;
}
// Issue any accumulated rewards.
if (totalRewardToIssue.isGreaterThan(0)) {
require(votingToken.mint(voterAddress, totalRewardToIssue.rawValue), "Voting token issuance failed");
}
}
// Overloaded method to enable short term backwards compatibility. Will be deprecated in the next DVM version.
function retrieveRewards(
address voterAddress,
uint256 roundId,
PendingRequest[] memory toRetrieve
) public override returns (FixedPoint.Unsigned memory) {
PendingRequestAncillary[] memory toRetrieveAncillary = new PendingRequestAncillary[](toRetrieve.length);
for (uint256 i = 0; i < toRetrieve.length; i++) {
toRetrieveAncillary[i].identifier = toRetrieve[i].identifier;
toRetrieveAncillary[i].time = toRetrieve[i].time;
toRetrieveAncillary[i].ancillaryData = "";
}
return retrieveRewards(voterAddress, roundId, toRetrieveAncillary);
}
/****************************************
* VOTING GETTER FUNCTIONS *
****************************************/
/**
* @notice Gets the queries that are being voted on this round.
* @return pendingRequests array containing identifiers of type `PendingRequest`.
* and timestamps for all pending requests.
*/
function getPendingRequests()
external
view
override(VotingInterface, VotingAncillaryInterface)
returns (PendingRequestAncillary[] memory)
{
uint256 blockTime = getCurrentTime();
uint256 currentRoundId = voteTiming.computeCurrentRoundId(blockTime);
// Solidity memory arrays aren't resizable (and reading storage is expensive). Hence this hackery to filter
// `pendingPriceRequests` only to those requests that have an Active RequestStatus.
PendingRequestAncillary[] memory unresolved = new PendingRequestAncillary[](pendingPriceRequests.length);
uint256 numUnresolved = 0;
for (uint256 i = 0; i < pendingPriceRequests.length; i++) {
PriceRequest storage priceRequest = priceRequests[pendingPriceRequests[i]];
if (_getRequestStatus(priceRequest, currentRoundId) == RequestStatus.Active) {
unresolved[numUnresolved] = PendingRequestAncillary({
identifier: priceRequest.identifier,
time: priceRequest.time,
ancillaryData: priceRequest.ancillaryData
});
numUnresolved++;
}
}
PendingRequestAncillary[] memory pendingRequests = new PendingRequestAncillary[](numUnresolved);
for (uint256 i = 0; i < numUnresolved; i++) {
pendingRequests[i] = unresolved[i];
}
return pendingRequests;
}
/**
* @notice Returns the current voting phase, as a function of the current time.
* @return Phase to indicate the current phase. Either { Commit, Reveal, NUM_PHASES_PLACEHOLDER }.
*/
function getVotePhase() external view override(VotingInterface, VotingAncillaryInterface) returns (Phase) {
return voteTiming.computeCurrentPhase(getCurrentTime());
}
/**
* @notice Returns the current round ID, as a function of the current time.
* @return uint256 representing the unique round ID.
*/
function getCurrentRoundId() external view override(VotingInterface, VotingAncillaryInterface) returns (uint256) {
return voteTiming.computeCurrentRoundId(getCurrentTime());
}
/****************************************
* OWNER ADMIN FUNCTIONS *
****************************************/
/**
* @notice Disables this Voting contract in favor of the migrated one.
* @dev Can only be called by the contract owner.
* @param newVotingAddress the newly migrated contract address.
*/
function setMigrated(address newVotingAddress)
external
override(VotingInterface, VotingAncillaryInterface)
onlyOwner
{
migratedAddress = newVotingAddress;
}
/**
* @notice Resets the inflation rate. Note: this change only applies to rounds that have not yet begun.
* @dev This method is public because calldata structs are not currently supported by solidity.
* @param newInflationRate sets the next round's inflation rate.
*/
function setInflationRate(FixedPoint.Unsigned memory newInflationRate)
public
override(VotingInterface, VotingAncillaryInterface)
onlyOwner
{
inflationRate = newInflationRate;
}
/**
* @notice Resets the Gat percentage. Note: this change only applies to rounds that have not yet begun.
* @dev This method is public because calldata structs are not currently supported by solidity.
* @param newGatPercentage sets the next round's Gat percentage.
*/
function setGatPercentage(FixedPoint.Unsigned memory newGatPercentage)
public
override(VotingInterface, VotingAncillaryInterface)
onlyOwner
{
require(newGatPercentage.isLessThan(1), "GAT percentage must be < 100%");
gatPercentage = newGatPercentage;
}
/**
* @notice Resets the rewards expiration timeout.
* @dev This change only applies to rounds that have not yet begun.
* @param NewRewardsExpirationTimeout how long a caller can wait before choosing to withdraw their rewards.
*/
function setRewardsExpirationTimeout(uint256 NewRewardsExpirationTimeout)
public
override(VotingInterface, VotingAncillaryInterface)
onlyOwner
{
rewardsExpirationTimeout = NewRewardsExpirationTimeout;
}
/****************************************
* PRIVATE AND INTERNAL FUNCTIONS *
****************************************/
// Returns the price for a given identifer. Three params are returns: bool if there was an error, int to represent
// the resolved price and a string which is filled with an error message, if there was an error or "".
function _getPriceOrError(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
)
private
view
returns (
bool,
int256,
string memory
)
{
PriceRequest storage priceRequest = _getPriceRequest(identifier, time, ancillaryData);
uint256 currentRoundId = voteTiming.computeCurrentRoundId(getCurrentTime());
RequestStatus requestStatus = _getRequestStatus(priceRequest, currentRoundId);
if (requestStatus == RequestStatus.Active) {
return (false, 0, "Current voting round not ended");
} else if (requestStatus == RequestStatus.Resolved) {
VoteInstance storage voteInstance = priceRequest.voteInstances[priceRequest.lastVotingRound];
(, int256 resolvedPrice) =
voteInstance.resultComputation.getResolvedPrice(_computeGat(priceRequest.lastVotingRound));
return (true, resolvedPrice, "");
} else if (requestStatus == RequestStatus.Future) {
return (false, 0, "Price is still to be voted on");
} else {
return (false, 0, "Price was never requested");
}
}
function _getPriceRequest(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) private view returns (PriceRequest storage) {
return priceRequests[_encodePriceRequest(identifier, time, ancillaryData)];
}
function _encodePriceRequest(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) private pure returns (bytes32) {
return keccak256(abi.encode(identifier, time, ancillaryData));
}
function _freezeRoundVariables(uint256 roundId) private {
Round storage round = rounds[roundId];
// Only on the first reveal should the snapshot be captured for that round.
if (round.snapshotId == 0) {
// There is no snapshot ID set, so create one.
round.snapshotId = votingToken.snapshot();
// Set the round inflation rate to the current global inflation rate.
rounds[roundId].inflationRate = inflationRate;
// Set the round gat percentage to the current global gat rate.
rounds[roundId].gatPercentage = gatPercentage;
// Set the rewards expiration time based on end of time of this round and the current global timeout.
rounds[roundId].rewardsExpirationTime = voteTiming.computeRoundEndTime(roundId).add(
rewardsExpirationTimeout
);
}
}
function _resolvePriceRequest(PriceRequest storage priceRequest, VoteInstance storage voteInstance) private {
if (priceRequest.index == UINT_MAX) {
return;
}
(bool isResolved, int256 resolvedPrice) =
voteInstance.resultComputation.getResolvedPrice(_computeGat(priceRequest.lastVotingRound));
require(isResolved, "Can't resolve unresolved request");
// Delete the resolved price request from pendingPriceRequests.
uint256 lastIndex = pendingPriceRequests.length - 1;
PriceRequest storage lastPriceRequest = priceRequests[pendingPriceRequests[lastIndex]];
lastPriceRequest.index = priceRequest.index;
pendingPriceRequests[priceRequest.index] = pendingPriceRequests[lastIndex];
pendingPriceRequests.pop();
priceRequest.index = UINT_MAX;
emit PriceResolved(
priceRequest.lastVotingRound,
priceRequest.identifier,
priceRequest.time,
resolvedPrice,
priceRequest.ancillaryData
);
}
function _computeGat(uint256 roundId) private view returns (FixedPoint.Unsigned memory) {
uint256 snapshotId = rounds[roundId].snapshotId;
if (snapshotId == 0) {
// No snapshot - return max value to err on the side of caution.
return FixedPoint.Unsigned(UINT_MAX);
}
// Grab the snapshotted supply from the voting token. It's already scaled by 10**18, so we can directly
// initialize the Unsigned value with the returned uint.
FixedPoint.Unsigned memory snapshottedSupply = FixedPoint.Unsigned(votingToken.totalSupplyAt(snapshotId));
// Multiply the total supply at the snapshot by the gatPercentage to get the GAT in number of tokens.
return snapshottedSupply.mul(rounds[roundId].gatPercentage);
}
function _getRequestStatus(PriceRequest storage priceRequest, uint256 currentRoundId)
private
view
returns (RequestStatus)
{
if (priceRequest.lastVotingRound == 0) {
return RequestStatus.NotRequested;
} else if (priceRequest.lastVotingRound < currentRoundId) {
VoteInstance storage voteInstance = priceRequest.voteInstances[priceRequest.lastVotingRound];
(bool isResolved, ) =
voteInstance.resultComputation.getResolvedPrice(_computeGat(priceRequest.lastVotingRound));
return isResolved ? RequestStatus.Resolved : RequestStatus.Active;
} else if (priceRequest.lastVotingRound == currentRoundId) {
return RequestStatus.Active;
} else {
// Means than priceRequest.lastVotingRound > currentRoundId
return RequestStatus.Future;
}
}
function _getIdentifierWhitelist() private view returns (IdentifierWhitelistInterface supportedIdentifiers) {
return IdentifierWhitelistInterface(finder.getImplementationAddress(OracleInterfaces.IdentifierWhitelist));
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
/**
* @title Provides addresses of the live contracts implementing certain interfaces.
* @dev Examples are the Oracle or Store interfaces.
*/
interface FinderInterface {
/**
* @notice Updates the address of the contract that implements `interfaceName`.
* @param interfaceName bytes32 encoding of the interface name that is either changed or registered.
* @param implementationAddress address of the deployed contract that implements the interface.
*/
function changeImplementationAddress(bytes32 interfaceName, address implementationAddress) external;
/**
* @notice Gets the address of the contract that implements the given `interfaceName`.
* @param interfaceName queried interface.
* @return implementationAddress address of the deployed contract that implements the interface.
*/
function getImplementationAddress(bytes32 interfaceName) external view returns (address);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
/**
* @title Financial contract facing Oracle interface.
* @dev Interface used by financial contracts to interact with the Oracle. Voters will use a different interface.
*/
abstract contract OracleAncillaryInterface {
/**
* @notice Enqueues a request (if a request isn't already present) for the given `identifier`, `time` pair.
* @dev Time must be in the past and the identifier must be supported.
* @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
* @param ancillaryData arbitrary data appended to a price request to give the voters more info from the caller.
* @param time unix timestamp for the price request.
*/
function requestPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public virtual;
/**
* @notice Whether the price for `identifier` and `time` is available.
* @dev Time must be in the past and the identifier must be supported.
* @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
* @param time unix timestamp for the price request.
* @param ancillaryData arbitrary data appended to a price request to give the voters more info from the caller.
* @return bool if the DVM has resolved to a price for the given identifier and timestamp.
*/
function hasPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public view virtual returns (bool);
/**
* @notice Gets the price for `identifier` and `time` if it has already been requested and resolved.
* @dev If the price is not available, the method reverts.
* @param identifier uniquely identifies the price requested. eg BTC/USD (encoded as bytes32) could be requested.
* @param time unix timestamp for the price request.
* @param ancillaryData arbitrary data appended to a price request to give the voters more info from the caller.
* @return int256 representing the resolved price for the given identifier and timestamp.
*/
function getPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public view virtual returns (int256);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
/**
* @title Interface for whitelists of supported identifiers that the oracle can provide prices for.
*/
interface IdentifierWhitelistInterface {
/**
* @notice Adds the provided identifier as a supported identifier.
* @dev Price requests using this identifier will succeed after this call.
* @param identifier bytes32 encoding of the string identifier. Eg: BTC/USD.
*/
function addSupportedIdentifier(bytes32 identifier) external;
/**
* @notice Removes the identifier from the whitelist.
* @dev Price requests using this identifier will no longer succeed after this call.
* @param identifier bytes32 encoding of the string identifier. Eg: BTC/USD.
*/
function removeSupportedIdentifier(bytes32 identifier) external;
/**
* @notice Checks whether an identifier is on the whitelist.
* @param identifier bytes32 encoding of the string identifier. Eg: BTC/USD.
* @return bool if the identifier is supported (or not).
*/
function isIdentifierSupported(bytes32 identifier) external view returns (bool);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/MultiRole.sol";
import "../interfaces/RegistryInterface.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
/**
* @title Registry for financial contracts and approved financial contract creators.
* @dev Maintains a whitelist of financial contract creators that are allowed
* to register new financial contracts and stores party members of a financial contract.
*/
contract Registry is RegistryInterface, MultiRole {
using SafeMath for uint256;
/****************************************
* INTERNAL VARIABLES AND STORAGE *
****************************************/
enum Roles {
Owner, // The owner manages the set of ContractCreators.
ContractCreator // Can register financial contracts.
}
// This enum is required because a `WasValid` state is required
// to ensure that financial contracts cannot be re-registered.
enum Validity { Invalid, Valid }
// Local information about a contract.
struct FinancialContract {
Validity valid;
uint128 index;
}
struct Party {
address[] contracts; // Each financial contract address is stored in this array.
// The address of each financial contract is mapped to its index for constant time look up and deletion.
mapping(address => uint256) contractIndex;
}
// Array of all contracts that are approved to use the UMA Oracle.
address[] public registeredContracts;
// Map of financial contract contracts to the associated FinancialContract struct.
mapping(address => FinancialContract) public contractMap;
// Map each party member to their their associated Party struct.
mapping(address => Party) private partyMap;
/****************************************
* EVENTS *
****************************************/
event NewContractRegistered(address indexed contractAddress, address indexed creator, address[] parties);
event PartyAdded(address indexed contractAddress, address indexed party);
event PartyRemoved(address indexed contractAddress, address indexed party);
/**
* @notice Construct the Registry contract.
*/
constructor() {
_createExclusiveRole(uint256(Roles.Owner), uint256(Roles.Owner), msg.sender);
// Start with no contract creators registered.
_createSharedRole(uint256(Roles.ContractCreator), uint256(Roles.Owner), new address[](0));
}
/****************************************
* REGISTRATION FUNCTIONS *
****************************************/
/**
* @notice Registers a new financial contract.
* @dev Only authorized contract creators can call this method.
* @param parties array of addresses who become parties in the contract.
* @param contractAddress address of the contract against which the parties are registered.
*/
function registerContract(address[] calldata parties, address contractAddress)
external
override
onlyRoleHolder(uint256(Roles.ContractCreator))
{
FinancialContract storage financialContract = contractMap[contractAddress];
require(contractMap[contractAddress].valid == Validity.Invalid, "Can only register once");
// Store contract address as a registered contract.
registeredContracts.push(contractAddress);
// No length check necessary because we should never hit (2^127 - 1) contracts.
financialContract.index = uint128(registeredContracts.length.sub(1));
// For all parties in the array add them to the contract's parties.
financialContract.valid = Validity.Valid;
for (uint256 i = 0; i < parties.length; i = i.add(1)) {
_addPartyToContract(parties[i], contractAddress);
}
emit NewContractRegistered(contractAddress, msg.sender, parties);
}
/**
* @notice Adds a party member to the calling contract.
* @dev msg.sender will be used to determine the contract that this party is added to.
* @param party new party for the calling contract.
*/
function addPartyToContract(address party) external override {
address contractAddress = msg.sender;
require(contractMap[contractAddress].valid == Validity.Valid, "Can only add to valid contract");
_addPartyToContract(party, contractAddress);
}
/**
* @notice Removes a party member from the calling contract.
* @dev msg.sender will be used to determine the contract that this party is removed from.
* @param partyAddress address to be removed from the calling contract.
*/
function removePartyFromContract(address partyAddress) external override {
address contractAddress = msg.sender;
Party storage party = partyMap[partyAddress];
uint256 numberOfContracts = party.contracts.length;
require(numberOfContracts != 0, "Party has no contracts");
require(contractMap[contractAddress].valid == Validity.Valid, "Remove only from valid contract");
require(isPartyMemberOfContract(partyAddress, contractAddress), "Can only remove existing party");
// Index of the current location of the contract to remove.
uint256 deleteIndex = party.contractIndex[contractAddress];
// Store the last contract's address to update the lookup map.
address lastContractAddress = party.contracts[numberOfContracts - 1];
// Swap the contract to be removed with the last contract.
party.contracts[deleteIndex] = lastContractAddress;
// Update the lookup index with the new location.
party.contractIndex[lastContractAddress] = deleteIndex;
// Pop the last contract from the array and update the lookup map.
party.contracts.pop();
delete party.contractIndex[contractAddress];
emit PartyRemoved(contractAddress, partyAddress);
}
/****************************************
* REGISTRY STATE GETTERS *
****************************************/
/**
* @notice Returns whether the contract has been registered with the registry.
* @dev If it is registered, it is an authorized participant in the UMA system.
* @param contractAddress address of the financial contract.
* @return bool indicates whether the contract is registered.
*/
function isContractRegistered(address contractAddress) external view override returns (bool) {
return contractMap[contractAddress].valid == Validity.Valid;
}
/**
* @notice Returns a list of all contracts that are associated with a particular party.
* @param party address of the party.
* @return an array of the contracts the party is registered to.
*/
function getRegisteredContracts(address party) external view override returns (address[] memory) {
return partyMap[party].contracts;
}
/**
* @notice Returns all registered contracts.
* @return all registered contract addresses within the system.
*/
function getAllRegisteredContracts() external view override returns (address[] memory) {
return registeredContracts;
}
/**
* @notice checks if an address is a party of a contract.
* @param party party to check.
* @param contractAddress address to check against the party.
* @return bool indicating if the address is a party of the contract.
*/
function isPartyMemberOfContract(address party, address contractAddress) public view override returns (bool) {
uint256 index = partyMap[party].contractIndex[contractAddress];
return partyMap[party].contracts.length > index && partyMap[party].contracts[index] == contractAddress;
}
/****************************************
* INTERNAL FUNCTIONS *
****************************************/
function _addPartyToContract(address party, address contractAddress) internal {
require(!isPartyMemberOfContract(party, contractAddress), "Can only register a party once");
uint256 contractIndex = partyMap[party].contracts.length;
partyMap[party].contracts.push(contractAddress);
partyMap[party].contractIndex[contractAddress] = contractIndex;
emit PartyAdded(contractAddress, party);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../../common/implementation/FixedPoint.sol";
/**
* @title Computes vote results.
* @dev The result is the mode of the added votes. Otherwise, the vote is unresolved.
*/
library ResultComputation {
using FixedPoint for FixedPoint.Unsigned;
/****************************************
* INTERNAL LIBRARY DATA STRUCTURE *
****************************************/
struct Data {
// Maps price to number of tokens that voted for that price.
mapping(int256 => FixedPoint.Unsigned) voteFrequency;
// The total votes that have been added.
FixedPoint.Unsigned totalVotes;
// The price that is the current mode, i.e., the price with the highest frequency in `voteFrequency`.
int256 currentMode;
}
/****************************************
* VOTING FUNCTIONS *
****************************************/
/**
* @notice Adds a new vote to be used when computing the result.
* @param data contains information to which the vote is applied.
* @param votePrice value specified in the vote for the given `numberTokens`.
* @param numberTokens number of tokens that voted on the `votePrice`.
*/
function addVote(
Data storage data,
int256 votePrice,
FixedPoint.Unsigned memory numberTokens
) internal {
data.totalVotes = data.totalVotes.add(numberTokens);
data.voteFrequency[votePrice] = data.voteFrequency[votePrice].add(numberTokens);
if (
votePrice != data.currentMode &&
data.voteFrequency[votePrice].isGreaterThan(data.voteFrequency[data.currentMode])
) {
data.currentMode = votePrice;
}
}
/****************************************
* VOTING STATE GETTERS *
****************************************/
/**
* @notice Returns whether the result is resolved, and if so, what value it resolved to.
* @dev `price` should be ignored if `isResolved` is false.
* @param data contains information against which the `minVoteThreshold` is applied.
* @param minVoteThreshold min (exclusive) number of tokens that must have voted for the result to be valid. Can be
* used to enforce a minimum voter participation rate, regardless of how the votes are distributed.
* @return isResolved indicates if the price has been resolved correctly.
* @return price the price that the dvm resolved to.
*/
function getResolvedPrice(Data storage data, FixedPoint.Unsigned memory minVoteThreshold)
internal
view
returns (bool isResolved, int256 price)
{
FixedPoint.Unsigned memory modeThreshold = FixedPoint.fromUnscaledUint(50).div(100);
if (
data.totalVotes.isGreaterThan(minVoteThreshold) &&
data.voteFrequency[data.currentMode].div(data.totalVotes).isGreaterThan(modeThreshold)
) {
// `modeThreshold` and `minVoteThreshold` are exceeded, so the current mode is the resolved price.
isResolved = true;
price = data.currentMode;
} else {
isResolved = false;
}
}
/**
* @notice Checks whether a `voteHash` is considered correct.
* @dev Should only be called after a vote is resolved, i.e., via `getResolvedPrice`.
* @param data contains information against which the `voteHash` is checked.
* @param voteHash committed hash submitted by the voter.
* @return bool true if the vote was correct.
*/
function wasVoteCorrect(Data storage data, bytes32 voteHash) internal view returns (bool) {
return voteHash == keccak256(abi.encode(data.currentMode));
}
/**
* @notice Gets the total number of tokens whose votes are considered correct.
* @dev Should only be called after a vote is resolved, i.e., via `getResolvedPrice`.
* @param data contains all votes against which the correctly voted tokens are counted.
* @return FixedPoint.Unsigned which indicates the frequency of the correctly voted tokens.
*/
function getTotalCorrectlyVotedTokens(Data storage data) internal view returns (FixedPoint.Unsigned memory) {
return data.voteFrequency[data.currentMode];
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "../interfaces/VotingInterface.sol";
/**
* @title Library to compute rounds and phases for an equal length commit-reveal voting cycle.
*/
library VoteTiming {
using SafeMath for uint256;
struct Data {
uint256 phaseLength;
}
/**
* @notice Initializes the data object. Sets the phase length based on the input.
*/
function init(Data storage data, uint256 phaseLength) internal {
// This should have a require message but this results in an internal Solidity error.
require(phaseLength > 0);
data.phaseLength = phaseLength;
}
/**
* @notice Computes the roundID based off the current time as floor(timestamp/roundLength).
* @dev The round ID depends on the global timestamp but not on the lifetime of the system.
* The consequence is that the initial round ID starts at an arbitrary number (that increments, as expected, for subsequent rounds) instead of zero or one.
* @param data input data object.
* @param currentTime input unix timestamp used to compute the current roundId.
* @return roundId defined as a function of the currentTime and `phaseLength` from `data`.
*/
function computeCurrentRoundId(Data storage data, uint256 currentTime) internal view returns (uint256) {
uint256 roundLength = data.phaseLength.mul(uint256(VotingAncillaryInterface.Phase.NUM_PHASES_PLACEHOLDER));
return currentTime.div(roundLength);
}
/**
* @notice compute the round end time as a function of the round Id.
* @param data input data object.
* @param roundId uniquely identifies the current round.
* @return timestamp unix time of when the current round will end.
*/
function computeRoundEndTime(Data storage data, uint256 roundId) internal view returns (uint256) {
uint256 roundLength = data.phaseLength.mul(uint256(VotingAncillaryInterface.Phase.NUM_PHASES_PLACEHOLDER));
return roundLength.mul(roundId.add(1));
}
/**
* @notice Computes the current phase based only on the current time.
* @param data input data object.
* @param currentTime input unix timestamp used to compute the current roundId.
* @return current voting phase based on current time and vote phases configuration.
*/
function computeCurrentPhase(Data storage data, uint256 currentTime)
internal
view
returns (VotingAncillaryInterface.Phase)
{
// This employs some hacky casting. We could make this an if-statement if we're worried about type safety.
return
VotingAncillaryInterface.Phase(
currentTime.div(data.phaseLength).mod(uint256(VotingAncillaryInterface.Phase.NUM_PHASES_PLACEHOLDER))
);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../../common/implementation/ExpandedERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Snapshot.sol";
/**
* @title Ownership of this token allows a voter to respond to price requests.
* @dev Supports snapshotting and allows the Oracle to mint new tokens as rewards.
*/
contract VotingToken is ExpandedERC20, ERC20Snapshot {
/**
* @notice Constructs the VotingToken.
*/
constructor() ExpandedERC20("UMA Voting Token v1", "UMA", 18) ERC20Snapshot() {}
function decimals() public view virtual override(ERC20, ExpandedERC20) returns (uint8) {
return super.decimals();
}
/**
* @notice Creates a new snapshot ID.
* @return uint256 Thew new snapshot ID.
*/
function snapshot() external returns (uint256) {
return _snapshot();
}
// _transfer, _mint and _burn are ERC20 internal methods that are overridden by ERC20Snapshot,
// therefore the compiler will complain that VotingToken must override these methods
// because the two base classes (ERC20 and ERC20Snapshot) both define the same functions
function _transfer(
address from,
address to,
uint256 value
) internal override(ERC20) {
super._transfer(from, to, value);
}
function _mint(address account, uint256 value) internal virtual override(ERC20) {
super._mint(account, value);
}
function _burn(address account, uint256 value) internal virtual override(ERC20) {
super._burn(account, value);
}
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override(ERC20, ERC20Snapshot) {
super._beforeTokenTransfer(from, to, amount);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
/**
* @title Stores common interface names used throughout the DVM by registration in the Finder.
*/
library OracleInterfaces {
bytes32 public constant Oracle = "Oracle";
bytes32 public constant IdentifierWhitelist = "IdentifierWhitelist";
bytes32 public constant Store = "Store";
bytes32 public constant FinancialContractsAdmin = "FinancialContractsAdmin";
bytes32 public constant Registry = "Registry";
bytes32 public constant CollateralWhitelist = "CollateralWhitelist";
bytes32 public constant OptimisticOracle = "OptimisticOracle";
bytes32 public constant Bridge = "Bridge";
bytes32 public constant GenericHandler = "GenericHandler";
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
// Divide the signature in r, s and v variables
bytes32 r;
bytes32 s;
uint8 v;
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
if (signature.length == 65) {
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
// solhint-disable-next-line no-inline-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
} else if (signature.length == 64) {
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
// solhint-disable-next-line no-inline-assembly
assembly {
let vs := mload(add(signature, 0x40))
r := mload(add(signature, 0x20))
s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
v := add(shr(255, vs), 27)
}
} else {
revert("ECDSA: invalid signature length");
}
return recover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "ECDSA: invalid signature 's' value");
require(v == 27 || v == 28, "ECDSA: invalid signature 'v' value");
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
require(signer != address(0), "ECDSA: invalid signature");
return signer;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
library Exclusive {
struct RoleMembership {
address member;
}
function isMember(RoleMembership storage roleMembership, address memberToCheck) internal view returns (bool) {
return roleMembership.member == memberToCheck;
}
function resetMember(RoleMembership storage roleMembership, address newMember) internal {
require(newMember != address(0x0), "Cannot set an exclusive role to 0x0");
roleMembership.member = newMember;
}
function getMember(RoleMembership storage roleMembership) internal view returns (address) {
return roleMembership.member;
}
function init(RoleMembership storage roleMembership, address initialMember) internal {
resetMember(roleMembership, initialMember);
}
}
library Shared {
struct RoleMembership {
mapping(address => bool) members;
}
function isMember(RoleMembership storage roleMembership, address memberToCheck) internal view returns (bool) {
return roleMembership.members[memberToCheck];
}
function addMember(RoleMembership storage roleMembership, address memberToAdd) internal {
require(memberToAdd != address(0x0), "Cannot add 0x0 to a shared role");
roleMembership.members[memberToAdd] = true;
}
function removeMember(RoleMembership storage roleMembership, address memberToRemove) internal {
roleMembership.members[memberToRemove] = false;
}
function init(RoleMembership storage roleMembership, address[] memory initialMembers) internal {
for (uint256 i = 0; i < initialMembers.length; i++) {
addMember(roleMembership, initialMembers[i]);
}
}
}
/**
* @title Base class to manage permissions for the derived class.
*/
abstract contract MultiRole {
using Exclusive for Exclusive.RoleMembership;
using Shared for Shared.RoleMembership;
enum RoleType { Invalid, Exclusive, Shared }
struct Role {
uint256 managingRole;
RoleType roleType;
Exclusive.RoleMembership exclusiveRoleMembership;
Shared.RoleMembership sharedRoleMembership;
}
mapping(uint256 => Role) private roles;
event ResetExclusiveMember(uint256 indexed roleId, address indexed newMember, address indexed manager);
event AddedSharedMember(uint256 indexed roleId, address indexed newMember, address indexed manager);
event RemovedSharedMember(uint256 indexed roleId, address indexed oldMember, address indexed manager);
/**
* @notice Reverts unless the caller is a member of the specified roleId.
*/
modifier onlyRoleHolder(uint256 roleId) {
require(holdsRole(roleId, msg.sender), "Sender does not hold required role");
_;
}
/**
* @notice Reverts unless the caller is a member of the manager role for the specified roleId.
*/
modifier onlyRoleManager(uint256 roleId) {
require(holdsRole(roles[roleId].managingRole, msg.sender), "Can only be called by a role manager");
_;
}
/**
* @notice Reverts unless the roleId represents an initialized, exclusive roleId.
*/
modifier onlyExclusive(uint256 roleId) {
require(roles[roleId].roleType == RoleType.Exclusive, "Must be called on an initialized Exclusive role");
_;
}
/**
* @notice Reverts unless the roleId represents an initialized, shared roleId.
*/
modifier onlyShared(uint256 roleId) {
require(roles[roleId].roleType == RoleType.Shared, "Must be called on an initialized Shared role");
_;
}
/**
* @notice Whether `memberToCheck` is a member of roleId.
* @dev Reverts if roleId does not correspond to an initialized role.
* @param roleId the Role to check.
* @param memberToCheck the address to check.
* @return True if `memberToCheck` is a member of `roleId`.
*/
function holdsRole(uint256 roleId, address memberToCheck) public view returns (bool) {
Role storage role = roles[roleId];
if (role.roleType == RoleType.Exclusive) {
return role.exclusiveRoleMembership.isMember(memberToCheck);
} else if (role.roleType == RoleType.Shared) {
return role.sharedRoleMembership.isMember(memberToCheck);
}
revert("Invalid roleId");
}
/**
* @notice Changes the exclusive role holder of `roleId` to `newMember`.
* @dev Reverts if the caller is not a member of the managing role for `roleId` or if `roleId` is not an
* initialized, ExclusiveRole.
* @param roleId the ExclusiveRole membership to modify.
* @param newMember the new ExclusiveRole member.
*/
function resetMember(uint256 roleId, address newMember) public onlyExclusive(roleId) onlyRoleManager(roleId) {
roles[roleId].exclusiveRoleMembership.resetMember(newMember);
emit ResetExclusiveMember(roleId, newMember, msg.sender);
}
/**
* @notice Gets the current holder of the exclusive role, `roleId`.
* @dev Reverts if `roleId` does not represent an initialized, exclusive role.
* @param roleId the ExclusiveRole membership to check.
* @return the address of the current ExclusiveRole member.
*/
function getMember(uint256 roleId) public view onlyExclusive(roleId) returns (address) {
return roles[roleId].exclusiveRoleMembership.getMember();
}
/**
* @notice Adds `newMember` to the shared role, `roleId`.
* @dev Reverts if `roleId` does not represent an initialized, SharedRole or if the caller is not a member of the
* managing role for `roleId`.
* @param roleId the SharedRole membership to modify.
* @param newMember the new SharedRole member.
*/
function addMember(uint256 roleId, address newMember) public onlyShared(roleId) onlyRoleManager(roleId) {
roles[roleId].sharedRoleMembership.addMember(newMember);
emit AddedSharedMember(roleId, newMember, msg.sender);
}
/**
* @notice Removes `memberToRemove` from the shared role, `roleId`.
* @dev Reverts if `roleId` does not represent an initialized, SharedRole or if the caller is not a member of the
* managing role for `roleId`.
* @param roleId the SharedRole membership to modify.
* @param memberToRemove the current SharedRole member to remove.
*/
function removeMember(uint256 roleId, address memberToRemove) public onlyShared(roleId) onlyRoleManager(roleId) {
roles[roleId].sharedRoleMembership.removeMember(memberToRemove);
emit RemovedSharedMember(roleId, memberToRemove, msg.sender);
}
/**
* @notice Removes caller from the role, `roleId`.
* @dev Reverts if the caller is not a member of the role for `roleId` or if `roleId` is not an
* initialized, SharedRole.
* @param roleId the SharedRole membership to modify.
*/
function renounceMembership(uint256 roleId) public onlyShared(roleId) onlyRoleHolder(roleId) {
roles[roleId].sharedRoleMembership.removeMember(msg.sender);
emit RemovedSharedMember(roleId, msg.sender, msg.sender);
}
/**
* @notice Reverts if `roleId` is not initialized.
*/
modifier onlyValidRole(uint256 roleId) {
require(roles[roleId].roleType != RoleType.Invalid, "Attempted to use an invalid roleId");
_;
}
/**
* @notice Reverts if `roleId` is initialized.
*/
modifier onlyInvalidRole(uint256 roleId) {
require(roles[roleId].roleType == RoleType.Invalid, "Cannot use a pre-existing role");
_;
}
/**
* @notice Internal method to initialize a shared role, `roleId`, which will be managed by `managingRoleId`.
* `initialMembers` will be immediately added to the role.
* @dev Should be called by derived contracts, usually at construction time. Will revert if the role is already
* initialized.
*/
function _createSharedRole(
uint256 roleId,
uint256 managingRoleId,
address[] memory initialMembers
) internal onlyInvalidRole(roleId) {
Role storage role = roles[roleId];
role.roleType = RoleType.Shared;
role.managingRole = managingRoleId;
role.sharedRoleMembership.init(initialMembers);
require(
roles[managingRoleId].roleType != RoleType.Invalid,
"Attempted to use an invalid role to manage a shared role"
);
}
/**
* @notice Internal method to initialize an exclusive role, `roleId`, which will be managed by `managingRoleId`.
* `initialMember` will be immediately added to the role.
* @dev Should be called by derived contracts, usually at construction time. Will revert if the role is already
* initialized.
*/
function _createExclusiveRole(
uint256 roleId,
uint256 managingRoleId,
address initialMember
) internal onlyInvalidRole(roleId) {
Role storage role = roles[roleId];
role.roleType = RoleType.Exclusive;
role.managingRole = managingRoleId;
role.exclusiveRoleMembership.init(initialMember);
require(
roles[managingRoleId].roleType != RoleType.Invalid,
"Attempted to use an invalid role to manage an exclusive role"
);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
/**
* @title Interface for a registry of contracts and contract creators.
*/
interface RegistryInterface {
/**
* @notice Registers a new contract.
* @dev Only authorized contract creators can call this method.
* @param parties an array of addresses who become parties in the contract.
* @param contractAddress defines the address of the deployed contract.
*/
function registerContract(address[] calldata parties, address contractAddress) external;
/**
* @notice Returns whether the contract has been registered with the registry.
* @dev If it is registered, it is an authorized participant in the UMA system.
* @param contractAddress address of the contract.
* @return bool indicates whether the contract is registered.
*/
function isContractRegistered(address contractAddress) external view returns (bool);
/**
* @notice Returns a list of all contracts that are associated with a particular party.
* @param party address of the party.
* @return an array of the contracts the party is registered to.
*/
function getRegisteredContracts(address party) external view returns (address[] memory);
/**
* @notice Returns all registered contracts.
* @return all registered contract addresses within the system.
*/
function getAllRegisteredContracts() external view returns (address[] memory);
/**
* @notice Adds a party to the calling contract.
* @dev msg.sender must be the contract to which the party member is added.
* @param party address to be added to the contract.
*/
function addPartyToContract(address party) external;
/**
* @notice Removes a party member to the calling contract.
* @dev msg.sender must be the contract to which the party member is added.
* @param party address to be removed from the contract.
*/
function removePartyFromContract(address party) external;
/**
* @notice checks if an address is a party in a contract.
* @param party party to check.
* @param contractAddress address to check against the party.
* @return bool indicating if the address is a party of the contract.
*/
function isPartyMemberOfContract(address party, address contractAddress) external view returns (bool);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "./MultiRole.sol";
import "../interfaces/ExpandedIERC20.sol";
/**
* @title An ERC20 with permissioned burning and minting. The contract deployer will initially
* be the owner who is capable of adding new roles.
*/
contract ExpandedERC20 is ExpandedIERC20, ERC20, MultiRole {
enum Roles {
// Can set the minter and burner.
Owner,
// Addresses that can mint new tokens.
Minter,
// Addresses that can burn tokens that address owns.
Burner
}
uint8 _decimals;
/**
* @notice Constructs the ExpandedERC20.
* @param _tokenName The name which describes the new token.
* @param _tokenSymbol The ticker abbreviation of the name. Ideally < 5 chars.
* @param _tokenDecimals The number of decimals to define token precision.
*/
constructor(
string memory _tokenName,
string memory _tokenSymbol,
uint8 _tokenDecimals
) ERC20(_tokenName, _tokenSymbol) {
_decimals = _tokenDecimals;
_createExclusiveRole(uint256(Roles.Owner), uint256(Roles.Owner), msg.sender);
_createSharedRole(uint256(Roles.Minter), uint256(Roles.Owner), new address[](0));
_createSharedRole(uint256(Roles.Burner), uint256(Roles.Owner), new address[](0));
}
function decimals() public view virtual override(ERC20) returns (uint8) {
return _decimals;
}
/**
* @dev Mints `value` tokens to `recipient`, returning true on success.
* @param recipient address to mint to.
* @param value amount of tokens to mint.
* @return True if the mint succeeded, or False.
*/
function mint(address recipient, uint256 value)
external
override
onlyRoleHolder(uint256(Roles.Minter))
returns (bool)
{
_mint(recipient, value);
return true;
}
/**
* @dev Burns `value` tokens owned by `msg.sender`.
* @param value amount of tokens to burn.
*/
function burn(uint256 value) external override onlyRoleHolder(uint256(Roles.Burner)) {
_burn(msg.sender, value);
}
/**
* @notice Add Minter role to account.
* @dev The caller must have the Owner role.
* @param account The address to which the Minter role is added.
*/
function addMinter(address account) external virtual override {
addMember(uint256(Roles.Minter), account);
}
/**
* @notice Add Burner role to account.
* @dev The caller must have the Owner role.
* @param account The address to which the Burner role is added.
*/
function addBurner(address account) external virtual override {
addMember(uint256(Roles.Burner), account);
}
/**
* @notice Reset Owner role to account.
* @dev The caller must have the Owner role.
* @param account The new holder of the Owner role.
*/
function resetOwner(address account) external virtual override {
resetMember(uint256(Roles.Owner), account);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC20.sol";
import "../../../utils/Arrays.sol";
import "../../../utils/Counters.sol";
/**
* @dev This contract extends an ERC20 token with a snapshot mechanism. When a snapshot is created, the balances and
* total supply at the time are recorded for later access.
*
* This can be used to safely create mechanisms based on token balances such as trustless dividends or weighted voting.
* In naive implementations it's possible to perform a "double spend" attack by reusing the same balance from different
* accounts. By using snapshots to calculate dividends or voting power, those attacks no longer apply. It can also be
* used to create an efficient ERC20 forking mechanism.
*
* Snapshots are created by the internal {_snapshot} function, which will emit the {Snapshot} event and return a
* snapshot id. To get the total supply at the time of a snapshot, call the function {totalSupplyAt} with the snapshot
* id. To get the balance of an account at the time of a snapshot, call the {balanceOfAt} function with the snapshot id
* and the account address.
*
* ==== Gas Costs
*
* Snapshots are efficient. Snapshot creation is _O(1)_. Retrieval of balances or total supply from a snapshot is _O(log
* n)_ in the number of snapshots that have been created, although _n_ for a specific account will generally be much
* smaller since identical balances in subsequent snapshots are stored as a single entry.
*
* There is a constant overhead for normal ERC20 transfers due to the additional snapshot bookkeeping. This overhead is
* only significant for the first transfer that immediately follows a snapshot for a particular account. Subsequent
* transfers will have normal cost until the next snapshot, and so on.
*/
abstract contract ERC20Snapshot is ERC20 {
// Inspired by Jordi Baylina's MiniMeToken to record historical balances:
// https://github.com/Giveth/minimd/blob/ea04d950eea153a04c51fa510b068b9dded390cb/contracts/MiniMeToken.sol
using Arrays for uint256[];
using Counters for Counters.Counter;
// Snapshotted values have arrays of ids and the value corresponding to that id. These could be an array of a
// Snapshot struct, but that would impede usage of functions that work on an array.
struct Snapshots {
uint256[] ids;
uint256[] values;
}
mapping (address => Snapshots) private _accountBalanceSnapshots;
Snapshots private _totalSupplySnapshots;
// Snapshot ids increase monotonically, with the first value being 1. An id of 0 is invalid.
Counters.Counter private _currentSnapshotId;
/**
* @dev Emitted by {_snapshot} when a snapshot identified by `id` is created.
*/
event Snapshot(uint256 id);
/**
* @dev Creates a new snapshot and returns its snapshot id.
*
* Emits a {Snapshot} event that contains the same id.
*
* {_snapshot} is `internal` and you have to decide how to expose it externally. Its usage may be restricted to a
* set of accounts, for example using {AccessControl}, or it may be open to the public.
*
* [WARNING]
* ====
* While an open way of calling {_snapshot} is required for certain trust minimization mechanisms such as forking,
* you must consider that it can potentially be used by attackers in two ways.
*
* First, it can be used to increase the cost of retrieval of values from snapshots, although it will grow
* logarithmically thus rendering this attack ineffective in the long term. Second, it can be used to target
* specific accounts and increase the cost of ERC20 transfers for them, in the ways specified in the Gas Costs
* section above.
*
* We haven't measured the actual numbers; if this is something you're interested in please reach out to us.
* ====
*/
function _snapshot() internal virtual returns (uint256) {
_currentSnapshotId.increment();
uint256 currentId = _currentSnapshotId.current();
emit Snapshot(currentId);
return currentId;
}
/**
* @dev Retrieves the balance of `account` at the time `snapshotId` was created.
*/
function balanceOfAt(address account, uint256 snapshotId) public view virtual returns (uint256) {
(bool snapshotted, uint256 value) = _valueAt(snapshotId, _accountBalanceSnapshots[account]);
return snapshotted ? value : balanceOf(account);
}
/**
* @dev Retrieves the total supply at the time `snapshotId` was created.
*/
function totalSupplyAt(uint256 snapshotId) public view virtual returns(uint256) {
(bool snapshotted, uint256 value) = _valueAt(snapshotId, _totalSupplySnapshots);
return snapshotted ? value : totalSupply();
}
// Update balance and/or total supply snapshots before the values are modified. This is implemented
// in the _beforeTokenTransfer hook, which is executed for _mint, _burn, and _transfer operations.
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
super._beforeTokenTransfer(from, to, amount);
if (from == address(0)) {
// mint
_updateAccountSnapshot(to);
_updateTotalSupplySnapshot();
} else if (to == address(0)) {
// burn
_updateAccountSnapshot(from);
_updateTotalSupplySnapshot();
} else {
// transfer
_updateAccountSnapshot(from);
_updateAccountSnapshot(to);
}
}
function _valueAt(uint256 snapshotId, Snapshots storage snapshots)
private view returns (bool, uint256)
{
require(snapshotId > 0, "ERC20Snapshot: id is 0");
// solhint-disable-next-line max-line-length
require(snapshotId <= _currentSnapshotId.current(), "ERC20Snapshot: nonexistent id");
// When a valid snapshot is queried, there are three possibilities:
// a) The queried value was not modified after the snapshot was taken. Therefore, a snapshot entry was never
// created for this id, and all stored snapshot ids are smaller than the requested one. The value that corresponds
// to this id is the current one.
// b) The queried value was modified after the snapshot was taken. Therefore, there will be an entry with the
// requested id, and its value is the one to return.
// c) More snapshots were created after the requested one, and the queried value was later modified. There will be
// no entry for the requested id: the value that corresponds to it is that of the smallest snapshot id that is
// larger than the requested one.
//
// In summary, we need to find an element in an array, returning the index of the smallest value that is larger if
// it is not found, unless said value doesn't exist (e.g. when all values are smaller). Arrays.findUpperBound does
// exactly this.
uint256 index = snapshots.ids.findUpperBound(snapshotId);
if (index == snapshots.ids.length) {
return (false, 0);
} else {
return (true, snapshots.values[index]);
}
}
function _updateAccountSnapshot(address account) private {
_updateSnapshot(_accountBalanceSnapshots[account], balanceOf(account));
}
function _updateTotalSupplySnapshot() private {
_updateSnapshot(_totalSupplySnapshots, totalSupply());
}
function _updateSnapshot(Snapshots storage snapshots, uint256 currentValue) private {
uint256 currentId = _currentSnapshotId.current();
if (_lastSnapshotId(snapshots.ids) < currentId) {
snapshots.ids.push(currentId);
snapshots.values.push(currentValue);
}
}
function _lastSnapshotId(uint256[] storage ids) private view returns (uint256) {
if (ids.length == 0) {
return 0;
} else {
return ids[ids.length - 1];
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The defaut value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
* @title ERC20 interface that includes burn and mint methods.
*/
abstract contract ExpandedIERC20 is IERC20 {
/**
* @notice Burns a specific amount of the caller's tokens.
* @dev Only burns the caller's tokens, so it is safe to leave this method permissionless.
*/
function burn(uint256 value) external virtual;
/**
* @notice Mints tokens and adds them to the balance of the `to` address.
* @dev This method should be permissioned to only allow designated parties to mint tokens.
*/
function mint(address to, uint256 value) external virtual returns (bool);
function addMinter(address account) external virtual;
function addBurner(address account) external virtual;
function resetOwner(address account) external virtual;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./math/Math.sol";
/**
* @dev Collection of functions related to array types.
*/
library Arrays {
/**
* @dev Searches a sorted `array` and returns the first index that contains
* a value greater or equal to `element`. If no such index exists (i.e. all
* values in the array are strictly less than `element`), the array length is
* returned. Time complexity O(log n).
*
* `array` is expected to be sorted in ascending order, and to contain no
* repeated elements.
*/
function findUpperBound(uint256[] storage array, uint256 element) internal view returns (uint256) {
if (array.length == 0) {
return 0;
}
uint256 low = 0;
uint256 high = array.length;
while (low < high) {
uint256 mid = Math.average(low, high);
// Note that mid will always be strictly less than high (i.e. it will be a valid array index)
// because Math.average rounds down (it does integer division with truncation).
if (array[mid] > element) {
high = mid;
} else {
low = mid + 1;
}
}
// At this point `low` is the exclusive upper bound. We will return the inclusive upper bound.
if (low > 0 && array[low - 1] == element) {
return low - 1;
} else {
return low;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented or decremented by one. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../oracle/implementation/Finder.sol";
import "../oracle/implementation/Constants.sol";
import "../oracle/implementation/Voting.sol";
/**
* @title A contract that executes a short series of upgrade calls that must be performed atomically as a part of the
* upgrade process for Voting.sol.
* @dev Note: the complete upgrade process requires more than just the transactions in this contract. These are only
* the ones that need to be performed atomically.
*/
contract VotingUpgrader {
// Existing governor is the only one who can initiate the upgrade.
address public governor;
// Existing Voting contract needs to be informed of the address of the new Voting contract.
Voting public existingVoting;
// New governor will be the new owner of the finder.
// Finder contract to push upgrades to.
Finder public finder;
// Addresses to upgrade.
address public newVoting;
// Address to call setMigrated on the old voting contract.
address public setMigratedAddress;
/**
* @notice Removes an address from the whitelist.
* @param _governor the Governor contract address.
* @param _existingVoting the current/existing Voting contract address.
* @param _newVoting the new Voting deployment address.
* @param _finder the Finder contract address.
* @param _setMigratedAddress the address to set migrated. This address will be able to continue making calls to
* old voting contract (used to claim rewards on others' behalf). Note: this address
* can always be changed by the voters.
*/
constructor(
address _governor,
address _existingVoting,
address _newVoting,
address _finder,
address _setMigratedAddress
) {
governor = _governor;
existingVoting = Voting(_existingVoting);
newVoting = _newVoting;
finder = Finder(_finder);
setMigratedAddress = _setMigratedAddress;
}
/**
* @notice Performs the atomic portion of the upgrade process.
* @dev This method updates the Voting address in the finder, sets the old voting contract to migrated state, and
* returns ownership of the existing Voting contract and Finder back to the Governor.
*/
function upgrade() external {
require(msg.sender == governor, "Upgrade can only be initiated by the existing governor.");
// Change the addresses in the Finder.
finder.changeImplementationAddress(OracleInterfaces.Oracle, newVoting);
// Set the preset "migrated" address to allow this address to claim rewards on voters' behalf.
// This also effectively shuts down the existing voting contract so new votes cannot be triggered.
existingVoting.setMigrated(setMigratedAddress);
// Transfer back ownership of old voting contract and the finder to the governor.
existingVoting.transferOwnership(governor);
finder.transferOwnership(governor);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/access/Ownable.sol";
import "../interfaces/FinderInterface.sol";
/**
* @title Provides addresses of the live contracts implementing certain interfaces.
* @dev Examples of interfaces with implementations that Finder locates are the Oracle and Store interfaces.
*/
contract Finder is FinderInterface, Ownable {
mapping(bytes32 => address) public interfacesImplemented;
event InterfaceImplementationChanged(bytes32 indexed interfaceName, address indexed newImplementationAddress);
/**
* @notice Updates the address of the contract that implements `interfaceName`.
* @param interfaceName bytes32 of the interface name that is either changed or registered.
* @param implementationAddress address of the implementation contract.
*/
function changeImplementationAddress(bytes32 interfaceName, address implementationAddress)
external
override
onlyOwner
{
interfacesImplemented[interfaceName] = implementationAddress;
emit InterfaceImplementationChanged(interfaceName, implementationAddress);
}
/**
* @notice Gets the address of the contract that implements the given `interfaceName`.
* @param interfaceName queried interface.
* @return implementationAddress address of the defined interface.
*/
function getImplementationAddress(bytes32 interfaceName) external view override returns (address) {
address implementationAddress = interfacesImplemented[interfaceName];
require(implementationAddress != address(0x0), "Implementation not found");
return implementationAddress;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../oracle/implementation/Finder.sol";
import "../oracle/implementation/Constants.sol";
import "../oracle/implementation/Voting.sol";
/**
* @title A contract to track a whitelist of addresses.
*/
contract Umip3Upgrader {
// Existing governor is the only one who can initiate the upgrade.
address public existingGovernor;
// Existing Voting contract needs to be informed of the address of the new Voting contract.
Voting public existingVoting;
// New governor will be the new owner of the finder.
address public newGovernor;
// Finder contract to push upgrades to.
Finder public finder;
// Addresses to upgrade.
address public voting;
address public identifierWhitelist;
address public store;
address public financialContractsAdmin;
address public registry;
constructor(
address _existingGovernor,
address _existingVoting,
address _finder,
address _voting,
address _identifierWhitelist,
address _store,
address _financialContractsAdmin,
address _registry,
address _newGovernor
) {
existingGovernor = _existingGovernor;
existingVoting = Voting(_existingVoting);
finder = Finder(_finder);
voting = _voting;
identifierWhitelist = _identifierWhitelist;
store = _store;
financialContractsAdmin = _financialContractsAdmin;
registry = _registry;
newGovernor = _newGovernor;
}
function upgrade() external {
require(msg.sender == existingGovernor, "Upgrade can only be initiated by the existing governor.");
// Change the addresses in the Finder.
finder.changeImplementationAddress(OracleInterfaces.Oracle, voting);
finder.changeImplementationAddress(OracleInterfaces.IdentifierWhitelist, identifierWhitelist);
finder.changeImplementationAddress(OracleInterfaces.Store, store);
finder.changeImplementationAddress(OracleInterfaces.FinancialContractsAdmin, financialContractsAdmin);
finder.changeImplementationAddress(OracleInterfaces.Registry, registry);
// Transfer the ownership of the Finder to the new Governor now that all the addresses have been updated.
finder.transferOwnership(newGovernor);
// Inform the existing Voting contract of the address of the new Voting contract and transfer its
// ownership to the new governor to allow for any future changes to the migrated contract.
existingVoting.setMigrated(voting);
existingVoting.transferOwnership(newGovernor);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/Testable.sol";
import "../interfaces/OracleAncillaryInterface.sol";
import "../interfaces/IdentifierWhitelistInterface.sol";
import "../interfaces/FinderInterface.sol";
import "../implementation/Constants.sol";
// A mock oracle used for testing.
contract MockOracleAncillary is OracleAncillaryInterface, Testable {
// Represents an available price. Have to keep a separate bool to allow for price=0.
struct Price {
bool isAvailable;
int256 price;
// Time the verified price became available.
uint256 verifiedTime;
}
// The two structs below are used in an array and mapping to keep track of prices that have been requested but are
// not yet available.
struct QueryIndex {
bool isValid;
uint256 index;
}
// Represents a (identifier, time) point that has been queried.
struct QueryPoint {
bytes32 identifier;
uint256 time;
bytes ancillaryData;
}
// Reference to the Finder.
FinderInterface private finder;
// Conceptually we want a (time, identifier) -> price map.
mapping(bytes32 => mapping(uint256 => mapping(bytes => Price))) private verifiedPrices;
// The mapping and array allow retrieving all the elements in a mapping and finding/deleting elements.
// Can we generalize this data structure?
mapping(bytes32 => mapping(uint256 => mapping(bytes => QueryIndex))) private queryIndices;
QueryPoint[] private requestedPrices;
event PriceRequestAdded(address indexed requester, bytes32 indexed identifier, uint256 time, bytes ancillaryData);
event PushedPrice(
address indexed pusher,
bytes32 indexed identifier,
uint256 time,
bytes ancillaryData,
int256 price
);
constructor(address _finderAddress, address _timerAddress) Testable(_timerAddress) {
finder = FinderInterface(_finderAddress);
}
// Enqueues a request (if a request isn't already present) for the given (identifier, time) pair.
function requestPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public override {
require(_getIdentifierWhitelist().isIdentifierSupported(identifier));
Price storage lookup = verifiedPrices[identifier][time][ancillaryData];
if (!lookup.isAvailable && !queryIndices[identifier][time][ancillaryData].isValid) {
// New query, enqueue it for review.
queryIndices[identifier][time][ancillaryData] = QueryIndex(true, requestedPrices.length);
requestedPrices.push(QueryPoint(identifier, time, ancillaryData));
emit PriceRequestAdded(msg.sender, identifier, time, ancillaryData);
}
}
// Pushes the verified price for a requested query.
function pushPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData,
int256 price
) external {
verifiedPrices[identifier][time][ancillaryData] = Price(true, price, getCurrentTime());
QueryIndex storage queryIndex = queryIndices[identifier][time][ancillaryData];
require(queryIndex.isValid, "Can't push prices that haven't been requested");
// Delete from the array. Instead of shifting the queries over, replace the contents of `indexToReplace` with
// the contents of the last index (unless it is the last index).
uint256 indexToReplace = queryIndex.index;
delete queryIndices[identifier][time][ancillaryData];
uint256 lastIndex = requestedPrices.length - 1;
if (lastIndex != indexToReplace) {
QueryPoint storage queryToCopy = requestedPrices[lastIndex];
queryIndices[queryToCopy.identifier][queryToCopy.time][queryToCopy.ancillaryData].index = indexToReplace;
requestedPrices[indexToReplace] = queryToCopy;
}
emit PushedPrice(msg.sender, identifier, time, ancillaryData, price);
}
// Checks whether a price has been resolved.
function hasPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public view override returns (bool) {
require(_getIdentifierWhitelist().isIdentifierSupported(identifier));
Price storage lookup = verifiedPrices[identifier][time][ancillaryData];
return lookup.isAvailable;
}
// Gets a price that has already been resolved.
function getPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public view override returns (int256) {
require(_getIdentifierWhitelist().isIdentifierSupported(identifier));
Price storage lookup = verifiedPrices[identifier][time][ancillaryData];
require(lookup.isAvailable);
return lookup.price;
}
// Gets the queries that still need verified prices.
function getPendingQueries() external view returns (QueryPoint[] memory) {
return requestedPrices;
}
function _getIdentifierWhitelist() private view returns (IdentifierWhitelistInterface supportedIdentifiers) {
return IdentifierWhitelistInterface(finder.getImplementationAddress(OracleInterfaces.IdentifierWhitelist));
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/Testable.sol";
import "../interfaces/OracleInterface.sol";
import "../interfaces/IdentifierWhitelistInterface.sol";
import "../interfaces/FinderInterface.sol";
import "../implementation/Constants.sol";
// A mock oracle used for testing.
contract MockOracle is OracleInterface, Testable {
// Represents an available price. Have to keep a separate bool to allow for price=0.
struct Price {
bool isAvailable;
int256 price;
// Time the verified price became available.
uint256 verifiedTime;
}
// The two structs below are used in an array and mapping to keep track of prices that have been requested but are
// not yet available.
struct QueryIndex {
bool isValid;
uint256 index;
}
// Represents a (identifier, time) point that has been queried.
struct QueryPoint {
bytes32 identifier;
uint256 time;
}
// Reference to the Finder.
FinderInterface private finder;
// Conceptually we want a (time, identifier) -> price map.
mapping(bytes32 => mapping(uint256 => Price)) private verifiedPrices;
// The mapping and array allow retrieving all the elements in a mapping and finding/deleting elements.
// Can we generalize this data structure?
mapping(bytes32 => mapping(uint256 => QueryIndex)) private queryIndices;
QueryPoint[] private requestedPrices;
constructor(address _finderAddress, address _timerAddress) Testable(_timerAddress) {
finder = FinderInterface(_finderAddress);
}
// Enqueues a request (if a request isn't already present) for the given (identifier, time) pair.
function requestPrice(bytes32 identifier, uint256 time) public override {
require(_getIdentifierWhitelist().isIdentifierSupported(identifier));
Price storage lookup = verifiedPrices[identifier][time];
if (!lookup.isAvailable && !queryIndices[identifier][time].isValid) {
// New query, enqueue it for review.
queryIndices[identifier][time] = QueryIndex(true, requestedPrices.length);
requestedPrices.push(QueryPoint(identifier, time));
}
}
// Pushes the verified price for a requested query.
function pushPrice(
bytes32 identifier,
uint256 time,
int256 price
) external {
verifiedPrices[identifier][time] = Price(true, price, getCurrentTime());
QueryIndex storage queryIndex = queryIndices[identifier][time];
require(queryIndex.isValid, "Can't push prices that haven't been requested");
// Delete from the array. Instead of shifting the queries over, replace the contents of `indexToReplace` with
// the contents of the last index (unless it is the last index).
uint256 indexToReplace = queryIndex.index;
delete queryIndices[identifier][time];
uint256 lastIndex = requestedPrices.length - 1;
if (lastIndex != indexToReplace) {
QueryPoint storage queryToCopy = requestedPrices[lastIndex];
queryIndices[queryToCopy.identifier][queryToCopy.time].index = indexToReplace;
requestedPrices[indexToReplace] = queryToCopy;
}
}
// Checks whether a price has been resolved.
function hasPrice(bytes32 identifier, uint256 time) public view override returns (bool) {
require(_getIdentifierWhitelist().isIdentifierSupported(identifier));
Price storage lookup = verifiedPrices[identifier][time];
return lookup.isAvailable;
}
// Gets a price that has already been resolved.
function getPrice(bytes32 identifier, uint256 time) public view override returns (int256) {
require(_getIdentifierWhitelist().isIdentifierSupported(identifier));
Price storage lookup = verifiedPrices[identifier][time];
require(lookup.isAvailable);
return lookup.price;
}
// Gets the queries that still need verified prices.
function getPendingQueries() external view returns (QueryPoint[] memory) {
return requestedPrices;
}
function _getIdentifierWhitelist() private view returns (IdentifierWhitelistInterface supportedIdentifiers) {
return IdentifierWhitelistInterface(finder.getImplementationAddress(OracleInterfaces.IdentifierWhitelist));
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/MultiRole.sol";
import "../../common/implementation/FixedPoint.sol";
import "../../common/implementation/Testable.sol";
import "../interfaces/FinderInterface.sol";
import "../interfaces/IdentifierWhitelistInterface.sol";
import "../interfaces/OracleInterface.sol";
import "./Constants.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Address.sol";
/**
* @title Takes proposals for certain governance actions and allows UMA token holders to vote on them.
*/
contract Governor is MultiRole, Testable {
using SafeMath for uint256;
using Address for address;
/****************************************
* INTERNAL VARIABLES AND STORAGE *
****************************************/
enum Roles {
Owner, // Can set the proposer.
Proposer // Address that can make proposals.
}
struct Transaction {
address to;
uint256 value;
bytes data;
}
struct Proposal {
Transaction[] transactions;
uint256 requestTime;
}
FinderInterface private finder;
Proposal[] public proposals;
/****************************************
* EVENTS *
****************************************/
// Emitted when a new proposal is created.
event NewProposal(uint256 indexed id, Transaction[] transactions);
// Emitted when an existing proposal is executed.
event ProposalExecuted(uint256 indexed id, uint256 transactionIndex);
/**
* @notice Construct the Governor contract.
* @param _finderAddress keeps track of all contracts within the system based on their interfaceName.
* @param _startingId the initial proposal id that the contract will begin incrementing from.
* @param _timerAddress Contract that stores the current time in a testing environment.
* Must be set to 0x0 for production environments that use live time.
*/
constructor(
address _finderAddress,
uint256 _startingId,
address _timerAddress
) Testable(_timerAddress) {
finder = FinderInterface(_finderAddress);
_createExclusiveRole(uint256(Roles.Owner), uint256(Roles.Owner), msg.sender);
_createExclusiveRole(uint256(Roles.Proposer), uint256(Roles.Owner), msg.sender);
// Ensure the startingId is not set unreasonably high to avoid it being set such that new proposals overwrite
// other storage slots in the contract.
uint256 maxStartingId = 10**18;
require(_startingId <= maxStartingId, "Cannot set startingId larger than 10^18");
// This just sets the initial length of the array to the startingId since modifying length directly has been
// disallowed in solidity 0.6.
assembly {
sstore(proposals.slot, _startingId)
}
}
/****************************************
* PROPOSAL ACTIONS *
****************************************/
/**
* @notice Proposes a new governance action. Can only be called by the holder of the Proposer role.
* @param transactions list of transactions that are being proposed.
* @dev You can create the data portion of each transaction by doing the following:
* ```
* const truffleContractInstance = await TruffleContract.deployed()
* const data = truffleContractInstance.methods.methodToCall(arg1, arg2).encodeABI()
* ```
* Note: this method must be public because of a solidity limitation that
* disallows structs arrays to be passed to external functions.
*/
function propose(Transaction[] memory transactions) public onlyRoleHolder(uint256(Roles.Proposer)) {
uint256 id = proposals.length;
uint256 time = getCurrentTime();
// Note: doing all of this array manipulation manually is necessary because directly setting an array of
// structs in storage to an an array of structs in memory is currently not implemented in solidity :/.
// Add a zero-initialized element to the proposals array.
proposals.push();
// Initialize the new proposal.
Proposal storage proposal = proposals[id];
proposal.requestTime = time;
// Initialize the transaction array.
for (uint256 i = 0; i < transactions.length; i++) {
require(transactions[i].to != address(0), "The `to` address cannot be 0x0");
// If the transaction has any data with it the recipient must be a contract, not an EOA.
if (transactions[i].data.length > 0) {
require(transactions[i].to.isContract(), "EOA can't accept tx with data");
}
proposal.transactions.push(transactions[i]);
}
bytes32 identifier = _constructIdentifier(id);
// Request a vote on this proposal in the DVM.
OracleInterface oracle = _getOracle();
IdentifierWhitelistInterface supportedIdentifiers = _getIdentifierWhitelist();
supportedIdentifiers.addSupportedIdentifier(identifier);
oracle.requestPrice(identifier, time);
supportedIdentifiers.removeSupportedIdentifier(identifier);
emit NewProposal(id, transactions);
}
/**
* @notice Executes a proposed governance action that has been approved by voters.
* @dev This can be called by any address. Caller is expected to send enough ETH to execute payable transactions.
* @param id unique id for the executed proposal.
* @param transactionIndex unique transaction index for the executed proposal.
*/
function executeProposal(uint256 id, uint256 transactionIndex) external payable {
Proposal storage proposal = proposals[id];
int256 price = _getOracle().getPrice(_constructIdentifier(id), proposal.requestTime);
Transaction memory transaction = proposal.transactions[transactionIndex];
require(
transactionIndex == 0 || proposal.transactions[transactionIndex.sub(1)].to == address(0),
"Previous tx not yet executed"
);
require(transaction.to != address(0), "Tx already executed");
require(price != 0, "Proposal was rejected");
require(msg.value == transaction.value, "Must send exact amount of ETH");
// Delete the transaction before execution to avoid any potential re-entrancy issues.
delete proposal.transactions[transactionIndex];
require(_executeCall(transaction.to, transaction.value, transaction.data), "Tx execution failed");
emit ProposalExecuted(id, transactionIndex);
}
/****************************************
* GOVERNOR STATE GETTERS *
****************************************/
/**
* @notice Gets the total number of proposals (includes executed and non-executed).
* @return uint256 representing the current number of proposals.
*/
function numProposals() external view returns (uint256) {
return proposals.length;
}
/**
* @notice Gets the proposal data for a particular id.
* @dev after a proposal is executed, its data will be zeroed out, except for the request time.
* @param id uniquely identify the identity of the proposal.
* @return proposal struct containing transactions[] and requestTime.
*/
function getProposal(uint256 id) external view returns (Proposal memory) {
return proposals[id];
}
/****************************************
* PRIVATE GETTERS AND FUNCTIONS *
****************************************/
function _executeCall(
address to,
uint256 value,
bytes memory data
) private returns (bool) {
// Mostly copied from:
// solhint-disable-next-line max-line-length
// https://github.com/gnosis/safe-contracts/blob/59cfdaebcd8b87a0a32f87b50fead092c10d3a05/contracts/base/Executor.sol#L23-L31
// solhint-disable-next-line no-inline-assembly
bool success;
assembly {
let inputData := add(data, 0x20)
let inputDataSize := mload(data)
success := call(gas(), to, value, inputData, inputDataSize, 0, 0)
}
return success;
}
function _getOracle() private view returns (OracleInterface) {
return OracleInterface(finder.getImplementationAddress(OracleInterfaces.Oracle));
}
function _getIdentifierWhitelist() private view returns (IdentifierWhitelistInterface supportedIdentifiers) {
return IdentifierWhitelistInterface(finder.getImplementationAddress(OracleInterfaces.IdentifierWhitelist));
}
// Returns a UTF-8 identifier representing a particular admin proposal.
// The identifier is of the form "Admin n", where n is the proposal id provided.
function _constructIdentifier(uint256 id) internal pure returns (bytes32) {
bytes32 bytesId = _uintToUtf8(id);
return _addPrefix(bytesId, "Admin ", 6);
}
// This method converts the integer `v` into a base-10, UTF-8 representation stored in a `bytes32` type.
// If the input cannot be represented by 32 base-10 digits, it returns only the highest 32 digits.
// This method is based off of this code: https://ethereum.stackexchange.com/a/6613/47801.
function _uintToUtf8(uint256 v) internal pure returns (bytes32) {
bytes32 ret;
if (v == 0) {
// Handle 0 case explicitly.
ret = "0";
} else {
// Constants.
uint256 bitsPerByte = 8;
uint256 base = 10; // Note: the output should be base-10. The below implementation will not work for bases > 10.
uint256 utf8NumberOffset = 48;
while (v > 0) {
// Downshift the entire bytes32 to allow the new digit to be added at the "front" of the bytes32, which
// translates to the beginning of the UTF-8 representation.
ret = ret >> bitsPerByte;
// Separate the last digit that remains in v by modding by the base of desired output representation.
uint256 leastSignificantDigit = v % base;
// Digits 0-9 are represented by 48-57 in UTF-8, so an offset must be added to create the character.
bytes32 utf8Digit = bytes32(leastSignificantDigit + utf8NumberOffset);
// The top byte of ret has already been cleared to make room for the new digit.
// Upshift by 31 bytes to put it in position, and OR it with ret to leave the other characters untouched.
ret |= utf8Digit << (31 * bitsPerByte);
// Divide v by the base to remove the digit that was just added.
v /= base;
}
}
return ret;
}
// This method takes two UTF-8 strings represented as bytes32 and outputs one as a prefixed by the other.
// `input` is the UTF-8 that should have the prefix prepended.
// `prefix` is the UTF-8 that should be prepended onto input.
// `prefixLength` is number of UTF-8 characters represented by `prefix`.
// Notes:
// 1. If the resulting UTF-8 is larger than 32 characters, then only the first 32 characters will be represented
// by the bytes32 output.
// 2. If `prefix` has more characters than `prefixLength`, the function will produce an invalid result.
function _addPrefix(
bytes32 input,
bytes32 prefix,
uint256 prefixLength
) internal pure returns (bytes32) {
// Downshift `input` to open space at the "front" of the bytes32
bytes32 shiftedInput = input >> (prefixLength * 8);
return shiftedInput | prefix;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../Governor.sol";
// GovernorTest exposes internal methods in the Governor for testing.
contract GovernorTest is Governor {
constructor(address _timerAddress) Governor(address(0), 0, _timerAddress) {}
function addPrefix(
bytes32 input,
bytes32 prefix,
uint256 prefixLength
) external pure returns (bytes32) {
return _addPrefix(input, prefix, prefixLength);
}
function uintToUtf8(uint256 v) external pure returns (bytes32 ret) {
return _uintToUtf8(v);
}
function constructIdentifier(uint256 id) external pure returns (bytes32 identifier) {
return _constructIdentifier(id);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "../interfaces/StoreInterface.sol";
import "../interfaces/OracleAncillaryInterface.sol";
import "../interfaces/FinderInterface.sol";
import "../interfaces/IdentifierWhitelistInterface.sol";
import "../interfaces/OptimisticOracleInterface.sol";
import "./Constants.sol";
import "../../common/implementation/Testable.sol";
import "../../common/implementation/Lockable.sol";
import "../../common/implementation/FixedPoint.sol";
import "../../common/implementation/AddressWhitelist.sol";
/**
* @title Optimistic Requester.
* @notice Optional interface that requesters can implement to receive callbacks.
* @dev this contract does _not_ work with ERC777 collateral currencies or any others that call into the receiver on
* transfer(). Using an ERC777 token would allow a user to maliciously grief other participants (while also losing
* money themselves).
*/
interface OptimisticRequester {
/**
* @notice Callback for proposals.
* @param identifier price identifier being requested.
* @param timestamp timestamp of the price being requested.
* @param ancillaryData ancillary data of the price being requested.
*/
function priceProposed(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) external;
/**
* @notice Callback for disputes.
* @param identifier price identifier being requested.
* @param timestamp timestamp of the price being requested.
* @param ancillaryData ancillary data of the price being requested.
* @param refund refund received in the case that refundOnDispute was enabled.
*/
function priceDisputed(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
uint256 refund
) external;
/**
* @notice Callback for settlement.
* @param identifier price identifier being requested.
* @param timestamp timestamp of the price being requested.
* @param ancillaryData ancillary data of the price being requested.
* @param price price that was resolved by the escalation process.
*/
function priceSettled(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
int256 price
) external;
}
/**
* @title Optimistic Oracle.
* @notice Pre-DVM escalation contract that allows faster settlement.
*/
contract OptimisticOracle is OptimisticOracleInterface, Testable, Lockable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
using Address for address;
event RequestPrice(
address indexed requester,
bytes32 identifier,
uint256 timestamp,
bytes ancillaryData,
address currency,
uint256 reward,
uint256 finalFee
);
event ProposePrice(
address indexed requester,
address indexed proposer,
bytes32 identifier,
uint256 timestamp,
bytes ancillaryData,
int256 proposedPrice,
uint256 expirationTimestamp,
address currency
);
event DisputePrice(
address indexed requester,
address indexed proposer,
address indexed disputer,
bytes32 identifier,
uint256 timestamp,
bytes ancillaryData,
int256 proposedPrice
);
event Settle(
address indexed requester,
address indexed proposer,
address indexed disputer,
bytes32 identifier,
uint256 timestamp,
bytes ancillaryData,
int256 price,
uint256 payout
);
mapping(bytes32 => Request) public requests;
// Finder to provide addresses for DVM contracts.
FinderInterface public finder;
// Default liveness value for all price requests.
uint256 public defaultLiveness;
/**
* @notice Constructor.
* @param _liveness default liveness applied to each price request.
* @param _finderAddress finder to use to get addresses of DVM contracts.
* @param _timerAddress address of the timer contract. Should be 0x0 in prod.
*/
constructor(
uint256 _liveness,
address _finderAddress,
address _timerAddress
) Testable(_timerAddress) {
finder = FinderInterface(_finderAddress);
_validateLiveness(_liveness);
defaultLiveness = _liveness;
}
/**
* @notice Requests a new price.
* @param identifier price identifier being requested.
* @param timestamp timestamp of the price being requested.
* @param ancillaryData ancillary data representing additional args being passed with the price request.
* @param currency ERC20 token used for payment of rewards and fees. Must be approved for use with the DVM.
* @param reward reward offered to a successful proposer. Will be pulled from the caller. Note: this can be 0,
* which could make sense if the contract requests and proposes the value in the same call or
* provides its own reward system.
* @return totalBond default bond (final fee) + final fee that the proposer and disputer will be required to pay.
* This can be changed with a subsequent call to setBond().
*/
function requestPrice(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
IERC20 currency,
uint256 reward
) external override nonReentrant() returns (uint256 totalBond) {
require(getState(msg.sender, identifier, timestamp, ancillaryData) == State.Invalid, "requestPrice: Invalid");
require(_getIdentifierWhitelist().isIdentifierSupported(identifier), "Unsupported identifier");
require(_getCollateralWhitelist().isOnWhitelist(address(currency)), "Unsupported currency");
require(timestamp <= getCurrentTime(), "Timestamp in future");
require(ancillaryData.length <= ancillaryBytesLimit, "Invalid ancillary data");
uint256 finalFee = _getStore().computeFinalFee(address(currency)).rawValue;
requests[_getId(msg.sender, identifier, timestamp, ancillaryData)] = Request({
proposer: address(0),
disputer: address(0),
currency: currency,
settled: false,
refundOnDispute: false,
proposedPrice: 0,
resolvedPrice: 0,
expirationTime: 0,
reward: reward,
finalFee: finalFee,
bond: finalFee,
customLiveness: 0
});
if (reward > 0) {
currency.safeTransferFrom(msg.sender, address(this), reward);
}
emit RequestPrice(msg.sender, identifier, timestamp, ancillaryData, address(currency), reward, finalFee);
// This function returns the initial proposal bond for this request, which can be customized by calling
// setBond() with the same identifier and timestamp.
return finalFee.mul(2);
}
/**
* @notice Set the proposal bond associated with a price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param bond custom bond amount to set.
* @return totalBond new bond + final fee that the proposer and disputer will be required to pay. This can be
* changed again with a subsequent call to setBond().
*/
function setBond(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
uint256 bond
) external override nonReentrant() returns (uint256 totalBond) {
require(getState(msg.sender, identifier, timestamp, ancillaryData) == State.Requested, "setBond: Requested");
Request storage request = _getRequest(msg.sender, identifier, timestamp, ancillaryData);
request.bond = bond;
// Total bond is the final fee + the newly set bond.
return bond.add(request.finalFee);
}
/**
* @notice Sets the request to refund the reward if the proposal is disputed. This can help to "hedge" the caller
* in the event of a dispute-caused delay. Note: in the event of a dispute, the winner still receives the other's
* bond, so there is still profit to be made even if the reward is refunded.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
*/
function setRefundOnDispute(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) external override nonReentrant() {
require(
getState(msg.sender, identifier, timestamp, ancillaryData) == State.Requested,
"setRefundOnDispute: Requested"
);
_getRequest(msg.sender, identifier, timestamp, ancillaryData).refundOnDispute = true;
}
/**
* @notice Sets a custom liveness value for the request. Liveness is the amount of time a proposal must wait before
* being auto-resolved.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param customLiveness new custom liveness.
*/
function setCustomLiveness(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
uint256 customLiveness
) external override nonReentrant() {
require(
getState(msg.sender, identifier, timestamp, ancillaryData) == State.Requested,
"setCustomLiveness: Requested"
);
_validateLiveness(customLiveness);
_getRequest(msg.sender, identifier, timestamp, ancillaryData).customLiveness = customLiveness;
}
/**
* @notice Proposes a price value on another address' behalf. Note: this address will receive any rewards that come
* from this proposal. However, any bonds are pulled from the caller.
* @param proposer address to set as the proposer.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param proposedPrice price being proposed.
* @return totalBond the amount that's pulled from the caller's wallet as a bond. The bond will be returned to
* the proposer once settled if the proposal is correct.
*/
function proposePriceFor(
address proposer,
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
int256 proposedPrice
) public override nonReentrant() returns (uint256 totalBond) {
require(proposer != address(0), "proposer address must be non 0");
require(
getState(requester, identifier, timestamp, ancillaryData) == State.Requested,
"proposePriceFor: Requested"
);
Request storage request = _getRequest(requester, identifier, timestamp, ancillaryData);
request.proposer = proposer;
request.proposedPrice = proposedPrice;
// If a custom liveness has been set, use it instead of the default.
request.expirationTime = getCurrentTime().add(
request.customLiveness != 0 ? request.customLiveness : defaultLiveness
);
totalBond = request.bond.add(request.finalFee);
if (totalBond > 0) {
request.currency.safeTransferFrom(msg.sender, address(this), totalBond);
}
emit ProposePrice(
requester,
proposer,
identifier,
timestamp,
ancillaryData,
proposedPrice,
request.expirationTime,
address(request.currency)
);
// Callback.
if (address(requester).isContract())
try OptimisticRequester(requester).priceProposed(identifier, timestamp, ancillaryData) {} catch {}
}
/**
* @notice Proposes a price value for an existing price request.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param proposedPrice price being proposed.
* @return totalBond the amount that's pulled from the proposer's wallet as a bond. The bond will be returned to
* the proposer once settled if the proposal is correct.
*/
function proposePrice(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
int256 proposedPrice
) external override returns (uint256 totalBond) {
// Note: re-entrancy guard is done in the inner call.
return proposePriceFor(msg.sender, requester, identifier, timestamp, ancillaryData, proposedPrice);
}
/**
* @notice Disputes a price request with an active proposal on another address' behalf. Note: this address will
* receive any rewards that come from this dispute. However, any bonds are pulled from the caller.
* @param disputer address to set as the disputer.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return totalBond the amount that's pulled from the caller's wallet as a bond. The bond will be returned to
* the disputer once settled if the dispute was valid (the proposal was incorrect).
*/
function disputePriceFor(
address disputer,
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) public override nonReentrant() returns (uint256 totalBond) {
require(disputer != address(0), "disputer address must be non 0");
require(
getState(requester, identifier, timestamp, ancillaryData) == State.Proposed,
"disputePriceFor: Proposed"
);
Request storage request = _getRequest(requester, identifier, timestamp, ancillaryData);
request.disputer = disputer;
uint256 finalFee = request.finalFee;
uint256 bond = request.bond;
totalBond = bond.add(finalFee);
if (totalBond > 0) {
request.currency.safeTransferFrom(msg.sender, address(this), totalBond);
}
StoreInterface store = _getStore();
// Avoids stack too deep compilation error.
{
// Along with the final fee, "burn" part of the loser's bond to ensure that a larger bond always makes it
// proportionally more expensive to delay the resolution even if the proposer and disputer are the same
// party.
uint256 burnedBond = _computeBurnedBond(request);
// The total fee is the burned bond and the final fee added together.
uint256 totalFee = finalFee.add(burnedBond);
if (totalFee > 0) {
request.currency.safeIncreaseAllowance(address(store), totalFee);
_getStore().payOracleFeesErc20(address(request.currency), FixedPoint.Unsigned(totalFee));
}
}
_getOracle().requestPrice(identifier, timestamp, _stampAncillaryData(ancillaryData, requester));
// Compute refund.
uint256 refund = 0;
if (request.reward > 0 && request.refundOnDispute) {
refund = request.reward;
request.reward = 0;
request.currency.safeTransfer(requester, refund);
}
emit DisputePrice(
requester,
request.proposer,
disputer,
identifier,
timestamp,
ancillaryData,
request.proposedPrice
);
// Callback.
if (address(requester).isContract())
try OptimisticRequester(requester).priceDisputed(identifier, timestamp, ancillaryData, refund) {} catch {}
}
/**
* @notice Disputes a price value for an existing price request with an active proposal.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return totalBond the amount that's pulled from the disputer's wallet as a bond. The bond will be returned to
* the disputer once settled if the dispute was valid (the proposal was incorrect).
*/
function disputePrice(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) external override returns (uint256 totalBond) {
// Note: re-entrancy guard is done in the inner call.
return disputePriceFor(msg.sender, requester, identifier, timestamp, ancillaryData);
}
/**
* @notice Retrieves a price that was previously requested by a caller. Reverts if the request is not settled
* or settleable. Note: this method is not view so that this call may actually settle the price request if it
* hasn't been settled.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return resolved price.
*/
function settleAndGetPrice(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) external override nonReentrant() returns (int256) {
if (getState(msg.sender, identifier, timestamp, ancillaryData) != State.Settled) {
_settle(msg.sender, identifier, timestamp, ancillaryData);
}
return _getRequest(msg.sender, identifier, timestamp, ancillaryData).resolvedPrice;
}
/**
* @notice Attempts to settle an outstanding price request. Will revert if it isn't settleable.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return payout the amount that the "winner" (proposer or disputer) receives on settlement. This amount includes
* the returned bonds as well as additional rewards.
*/
function settle(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) external override nonReentrant() returns (uint256 payout) {
return _settle(requester, identifier, timestamp, ancillaryData);
}
/**
* @notice Gets the current data structure containing all information about a price request.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return the Request data structure.
*/
function getRequest(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) public view override returns (Request memory) {
return _getRequest(requester, identifier, timestamp, ancillaryData);
}
/**
* @notice Computes the current state of a price request. See the State enum for more details.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return the State.
*/
function getState(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) public view override returns (State) {
Request storage request = _getRequest(requester, identifier, timestamp, ancillaryData);
if (address(request.currency) == address(0)) {
return State.Invalid;
}
if (request.proposer == address(0)) {
return State.Requested;
}
if (request.settled) {
return State.Settled;
}
if (request.disputer == address(0)) {
return request.expirationTime <= getCurrentTime() ? State.Expired : State.Proposed;
}
return
_getOracle().hasPrice(identifier, timestamp, _stampAncillaryData(ancillaryData, requester))
? State.Resolved
: State.Disputed;
}
/**
* @notice Checks if a given request has resolved, expired or been settled (i.e the optimistic oracle has a price).
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return boolean indicating true if price exists and false if not.
*/
function hasPrice(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) public view override returns (bool) {
State state = getState(requester, identifier, timestamp, ancillaryData);
return state == State.Settled || state == State.Resolved || state == State.Expired;
}
/**
* @notice Generates stamped ancillary data in the format that it would be used in the case of a price dispute.
* @param ancillaryData ancillary data of the price being requested.
* @param requester sender of the initial price request.
* @return the stampped ancillary bytes.
*/
function stampAncillaryData(bytes memory ancillaryData, address requester) public pure returns (bytes memory) {
return _stampAncillaryData(ancillaryData, requester);
}
function _getId(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) private pure returns (bytes32) {
return keccak256(abi.encodePacked(requester, identifier, timestamp, ancillaryData));
}
function _settle(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) private returns (uint256 payout) {
State state = getState(requester, identifier, timestamp, ancillaryData);
// Set it to settled so this function can never be entered again.
Request storage request = _getRequest(requester, identifier, timestamp, ancillaryData);
request.settled = true;
if (state == State.Expired) {
// In the expiry case, just pay back the proposer's bond and final fee along with the reward.
request.resolvedPrice = request.proposedPrice;
payout = request.bond.add(request.finalFee).add(request.reward);
request.currency.safeTransfer(request.proposer, payout);
} else if (state == State.Resolved) {
// In the Resolved case, pay either the disputer or the proposer the entire payout (+ bond and reward).
request.resolvedPrice = _getOracle().getPrice(
identifier,
timestamp,
_stampAncillaryData(ancillaryData, requester)
);
bool disputeSuccess = request.resolvedPrice != request.proposedPrice;
uint256 bond = request.bond;
// Unburned portion of the loser's bond = 1 - burned bond.
uint256 unburnedBond = bond.sub(_computeBurnedBond(request));
// Winner gets:
// - Their bond back.
// - The unburned portion of the loser's bond.
// - Their final fee back.
// - The request reward (if not already refunded -- if refunded, it will be set to 0).
payout = bond.add(unburnedBond).add(request.finalFee).add(request.reward);
request.currency.safeTransfer(disputeSuccess ? request.disputer : request.proposer, payout);
} else {
revert("_settle: not settleable");
}
emit Settle(
requester,
request.proposer,
request.disputer,
identifier,
timestamp,
ancillaryData,
request.resolvedPrice,
payout
);
// Callback.
if (address(requester).isContract())
try
OptimisticRequester(requester).priceSettled(identifier, timestamp, ancillaryData, request.resolvedPrice)
{} catch {}
}
function _getRequest(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) private view returns (Request storage) {
return requests[_getId(requester, identifier, timestamp, ancillaryData)];
}
function _computeBurnedBond(Request storage request) private view returns (uint256) {
// burnedBond = floor(bond / 2)
return request.bond.div(2);
}
function _validateLiveness(uint256 _liveness) private pure {
require(_liveness < 5200 weeks, "Liveness too large");
require(_liveness > 0, "Liveness cannot be 0");
}
function _getOracle() internal view returns (OracleAncillaryInterface) {
return OracleAncillaryInterface(finder.getImplementationAddress(OracleInterfaces.Oracle));
}
function _getCollateralWhitelist() internal view returns (AddressWhitelist) {
return AddressWhitelist(finder.getImplementationAddress(OracleInterfaces.CollateralWhitelist));
}
function _getStore() internal view returns (StoreInterface) {
return StoreInterface(finder.getImplementationAddress(OracleInterfaces.Store));
}
function _getIdentifierWhitelist() internal view returns (IdentifierWhitelistInterface) {
return IdentifierWhitelistInterface(finder.getImplementationAddress(OracleInterfaces.IdentifierWhitelist));
}
// Stamps the ancillary data blob with the optimistic oracle tag denoting what contract requested it.
function _stampAncillaryData(bytes memory ancillaryData, address requester) internal pure returns (bytes memory) {
return abi.encodePacked(ancillaryData, "OptimisticOracle", requester);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "../../common/implementation/FixedPoint.sol";
/**
* @title Interface that allows financial contracts to pay oracle fees for their use of the system.
*/
interface StoreInterface {
/**
* @notice Pays Oracle fees in ETH to the store.
* @dev To be used by contracts whose margin currency is ETH.
*/
function payOracleFees() external payable;
/**
* @notice Pays oracle fees in the margin currency, erc20Address, to the store.
* @dev To be used if the margin currency is an ERC20 token rather than ETH.
* @param erc20Address address of the ERC20 token used to pay the fee.
* @param amount number of tokens to transfer. An approval for at least this amount must exist.
*/
function payOracleFeesErc20(address erc20Address, FixedPoint.Unsigned calldata amount) external;
/**
* @notice Computes the regular oracle fees that a contract should pay for a period.
* @param startTime defines the beginning time from which the fee is paid.
* @param endTime end time until which the fee is paid.
* @param pfc "profit from corruption", or the maximum amount of margin currency that a
* token sponsor could extract from the contract through corrupting the price feed in their favor.
* @return regularFee amount owed for the duration from start to end time for the given pfc.
* @return latePenalty for paying the fee after the deadline.
*/
function computeRegularFee(
uint256 startTime,
uint256 endTime,
FixedPoint.Unsigned calldata pfc
) external view returns (FixedPoint.Unsigned memory regularFee, FixedPoint.Unsigned memory latePenalty);
/**
* @notice Computes the final oracle fees that a contract should pay at settlement.
* @param currency token used to pay the final fee.
* @return finalFee amount due.
*/
function computeFinalFee(address currency) external view returns (FixedPoint.Unsigned memory);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
* @title Financial contract facing Oracle interface.
* @dev Interface used by financial contracts to interact with the Oracle. Voters will use a different interface.
*/
abstract contract OptimisticOracleInterface {
// Struct representing the state of a price request.
enum State {
Invalid, // Never requested.
Requested, // Requested, no other actions taken.
Proposed, // Proposed, but not expired or disputed yet.
Expired, // Proposed, not disputed, past liveness.
Disputed, // Disputed, but no DVM price returned yet.
Resolved, // Disputed and DVM price is available.
Settled // Final price has been set in the contract (can get here from Expired or Resolved).
}
// Struct representing a price request.
struct Request {
address proposer; // Address of the proposer.
address disputer; // Address of the disputer.
IERC20 currency; // ERC20 token used to pay rewards and fees.
bool settled; // True if the request is settled.
bool refundOnDispute; // True if the requester should be refunded their reward on dispute.
int256 proposedPrice; // Price that the proposer submitted.
int256 resolvedPrice; // Price resolved once the request is settled.
uint256 expirationTime; // Time at which the request auto-settles without a dispute.
uint256 reward; // Amount of the currency to pay to the proposer on settlement.
uint256 finalFee; // Final fee to pay to the Store upon request to the DVM.
uint256 bond; // Bond that the proposer and disputer must pay on top of the final fee.
uint256 customLiveness; // Custom liveness value set by the requester.
}
// This value must be <= the Voting contract's `ancillaryBytesLimit` value otherwise it is possible
// that a price can be requested to this contract successfully, but cannot be disputed because the DVM refuses
// to accept a price request made with ancillary data length of a certain size.
uint256 public constant ancillaryBytesLimit = 8192;
/**
* @notice Requests a new price.
* @param identifier price identifier being requested.
* @param timestamp timestamp of the price being requested.
* @param ancillaryData ancillary data representing additional args being passed with the price request.
* @param currency ERC20 token used for payment of rewards and fees. Must be approved for use with the DVM.
* @param reward reward offered to a successful proposer. Will be pulled from the caller. Note: this can be 0,
* which could make sense if the contract requests and proposes the value in the same call or
* provides its own reward system.
* @return totalBond default bond (final fee) + final fee that the proposer and disputer will be required to pay.
* This can be changed with a subsequent call to setBond().
*/
function requestPrice(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
IERC20 currency,
uint256 reward
) external virtual returns (uint256 totalBond);
/**
* @notice Set the proposal bond associated with a price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param bond custom bond amount to set.
* @return totalBond new bond + final fee that the proposer and disputer will be required to pay. This can be
* changed again with a subsequent call to setBond().
*/
function setBond(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
uint256 bond
) external virtual returns (uint256 totalBond);
/**
* @notice Sets the request to refund the reward if the proposal is disputed. This can help to "hedge" the caller
* in the event of a dispute-caused delay. Note: in the event of a dispute, the winner still receives the other's
* bond, so there is still profit to be made even if the reward is refunded.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
*/
function setRefundOnDispute(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) external virtual;
/**
* @notice Sets a custom liveness value for the request. Liveness is the amount of time a proposal must wait before
* being auto-resolved.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param customLiveness new custom liveness.
*/
function setCustomLiveness(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
uint256 customLiveness
) external virtual;
/**
* @notice Proposes a price value on another address' behalf. Note: this address will receive any rewards that come
* from this proposal. However, any bonds are pulled from the caller.
* @param proposer address to set as the proposer.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param proposedPrice price being proposed.
* @return totalBond the amount that's pulled from the caller's wallet as a bond. The bond will be returned to
* the proposer once settled if the proposal is correct.
*/
function proposePriceFor(
address proposer,
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
int256 proposedPrice
) public virtual returns (uint256 totalBond);
/**
* @notice Proposes a price value for an existing price request.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @param proposedPrice price being proposed.
* @return totalBond the amount that's pulled from the proposer's wallet as a bond. The bond will be returned to
* the proposer once settled if the proposal is correct.
*/
function proposePrice(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData,
int256 proposedPrice
) external virtual returns (uint256 totalBond);
/**
* @notice Disputes a price request with an active proposal on another address' behalf. Note: this address will
* receive any rewards that come from this dispute. However, any bonds are pulled from the caller.
* @param disputer address to set as the disputer.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return totalBond the amount that's pulled from the caller's wallet as a bond. The bond will be returned to
* the disputer once settled if the dispute was value (the proposal was incorrect).
*/
function disputePriceFor(
address disputer,
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) public virtual returns (uint256 totalBond);
/**
* @notice Disputes a price value for an existing price request with an active proposal.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return totalBond the amount that's pulled from the disputer's wallet as a bond. The bond will be returned to
* the disputer once settled if the dispute was valid (the proposal was incorrect).
*/
function disputePrice(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) external virtual returns (uint256 totalBond);
/**
* @notice Retrieves a price that was previously requested by a caller. Reverts if the request is not settled
* or settleable. Note: this method is not view so that this call may actually settle the price request if it
* hasn't been settled.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return resolved price.
*/
function settleAndGetPrice(
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) external virtual returns (int256);
/**
* @notice Attempts to settle an outstanding price request. Will revert if it isn't settleable.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return payout the amount that the "winner" (proposer or disputer) receives on settlement. This amount includes
* the returned bonds as well as additional rewards.
*/
function settle(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) external virtual returns (uint256 payout);
/**
* @notice Gets the current data structure containing all information about a price request.
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return the Request data structure.
*/
function getRequest(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) public view virtual returns (Request memory);
function getState(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) public view virtual returns (State);
/**
* @notice Checks if a given request has resolved or been settled (i.e the optimistic oracle has a price).
* @param requester sender of the initial price request.
* @param identifier price identifier to identify the existing request.
* @param timestamp timestamp to identify the existing request.
* @param ancillaryData ancillary data of the price being requested.
* @return the State.
*/
function hasPrice(
address requester,
bytes32 identifier,
uint256 timestamp,
bytes memory ancillaryData
) public view virtual returns (bool);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
/**
* @title A contract that provides modifiers to prevent reentrancy to state-changing and view-only methods. This contract
* is inspired by https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/ReentrancyGuard.sol
* and https://github.com/balancer-labs/balancer-core/blob/master/contracts/BPool.sol.
*/
contract Lockable {
bool private _notEntered;
constructor() {
// Storing an initial non-zero value makes deployment a bit more
// expensive, but in exchange the refund on every call to nonReentrant
// will be lower in amount. Since refunds are capped to a percetange of
// the total transaction's gas, it is best to keep them low in cases
// like this one, to increase the likelihood of the full refund coming
// into effect.
_notEntered = true;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_preEntranceCheck();
_preEntranceSet();
_;
_postEntranceReset();
}
/**
* @dev Designed to prevent a view-only method from being re-entered during a call to a `nonReentrant()` state-changing method.
*/
modifier nonReentrantView() {
_preEntranceCheck();
_;
}
// Internal methods are used to avoid copying the require statement's bytecode to every `nonReentrant()` method.
// On entry into a function, `_preEntranceCheck()` should always be called to check if the function is being re-entered.
// Then, if the function modifies state, it should call `_postEntranceSet()`, perform its logic, and then call `_postEntranceReset()`.
// View-only methods can simply call `_preEntranceCheck()` to make sure that it is not being re-entered.
function _preEntranceCheck() internal view {
// On the first call to nonReentrant, _notEntered will be true
require(_notEntered, "ReentrancyGuard: reentrant call");
}
function _preEntranceSet() internal {
// Any calls to nonReentrant after this point will fail
_notEntered = false;
}
function _postEntranceReset() internal {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_notEntered = true;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/access/Ownable.sol";
import "./Lockable.sol";
/**
* @title A contract to track a whitelist of addresses.
*/
contract AddressWhitelist is Ownable, Lockable {
enum Status { None, In, Out }
mapping(address => Status) public whitelist;
address[] public whitelistIndices;
event AddedToWhitelist(address indexed addedAddress);
event RemovedFromWhitelist(address indexed removedAddress);
/**
* @notice Adds an address to the whitelist.
* @param newElement the new address to add.
*/
function addToWhitelist(address newElement) external nonReentrant() onlyOwner {
// Ignore if address is already included
if (whitelist[newElement] == Status.In) {
return;
}
// Only append new addresses to the array, never a duplicate
if (whitelist[newElement] == Status.None) {
whitelistIndices.push(newElement);
}
whitelist[newElement] = Status.In;
emit AddedToWhitelist(newElement);
}
/**
* @notice Removes an address from the whitelist.
* @param elementToRemove the existing address to remove.
*/
function removeFromWhitelist(address elementToRemove) external nonReentrant() onlyOwner {
if (whitelist[elementToRemove] != Status.Out) {
whitelist[elementToRemove] = Status.Out;
emit RemovedFromWhitelist(elementToRemove);
}
}
/**
* @notice Checks whether an address is on the whitelist.
* @param elementToCheck the address to check.
* @return True if `elementToCheck` is on the whitelist, or False.
*/
function isOnWhitelist(address elementToCheck) external view nonReentrantView() returns (bool) {
return whitelist[elementToCheck] == Status.In;
}
/**
* @notice Gets all addresses that are currently included in the whitelist.
* @dev Note: This method skips over, but still iterates through addresses. It is possible for this call to run out
* of gas if a large number of addresses have been removed. To reduce the likelihood of this unlikely scenario, we
* can modify the implementation so that when addresses are removed, the last addresses in the array is moved to
* the empty index.
* @return activeWhitelist the list of addresses on the whitelist.
*/
function getWhitelist() external view nonReentrantView() returns (address[] memory activeWhitelist) {
// Determine size of whitelist first
uint256 activeCount = 0;
for (uint256 i = 0; i < whitelistIndices.length; i++) {
if (whitelist[whitelistIndices[i]] == Status.In) {
activeCount++;
}
}
// Populate whitelist
activeWhitelist = new address[](activeCount);
activeCount = 0;
for (uint256 i = 0; i < whitelistIndices.length; i++) {
address addr = whitelistIndices[i];
if (whitelist[addr] == Status.In) {
activeWhitelist[activeCount] = addr;
activeCount++;
}
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "../OptimisticOracle.sol";
// This is just a test contract to make requests to the optimistic oracle.
contract OptimisticRequesterTest is OptimisticRequester {
OptimisticOracle optimisticOracle;
bool public shouldRevert = false;
// State variables to track incoming calls.
bytes32 public identifier;
uint256 public timestamp;
bytes public ancillaryData;
uint256 public refund;
int256 public price;
// Implement collateralCurrency so that this contract simulates a financial contract whose collateral
// token can be fetched by off-chain clients.
IERC20 public collateralCurrency;
// Manually set an expiration timestamp to simulate expiry price requests
uint256 public expirationTimestamp;
constructor(OptimisticOracle _optimisticOracle) {
optimisticOracle = _optimisticOracle;
}
function requestPrice(
bytes32 _identifier,
uint256 _timestamp,
bytes memory _ancillaryData,
IERC20 currency,
uint256 reward
) external {
// Set collateral currency to last requested currency:
collateralCurrency = currency;
currency.approve(address(optimisticOracle), reward);
optimisticOracle.requestPrice(_identifier, _timestamp, _ancillaryData, currency, reward);
}
function settleAndGetPrice(
bytes32 _identifier,
uint256 _timestamp,
bytes memory _ancillaryData
) external returns (int256) {
return optimisticOracle.settleAndGetPrice(_identifier, _timestamp, _ancillaryData);
}
function setBond(
bytes32 _identifier,
uint256 _timestamp,
bytes memory _ancillaryData,
uint256 bond
) external {
optimisticOracle.setBond(_identifier, _timestamp, _ancillaryData, bond);
}
function setRefundOnDispute(
bytes32 _identifier,
uint256 _timestamp,
bytes memory _ancillaryData
) external {
optimisticOracle.setRefundOnDispute(_identifier, _timestamp, _ancillaryData);
}
function setCustomLiveness(
bytes32 _identifier,
uint256 _timestamp,
bytes memory _ancillaryData,
uint256 customLiveness
) external {
optimisticOracle.setCustomLiveness(_identifier, _timestamp, _ancillaryData, customLiveness);
}
function setRevert(bool _shouldRevert) external {
shouldRevert = _shouldRevert;
}
function setExpirationTimestamp(uint256 _expirationTimestamp) external {
expirationTimestamp = _expirationTimestamp;
}
function clearState() external {
delete identifier;
delete timestamp;
delete refund;
delete price;
}
function priceProposed(
bytes32 _identifier,
uint256 _timestamp,
bytes memory _ancillaryData
) external override {
require(!shouldRevert);
identifier = _identifier;
timestamp = _timestamp;
ancillaryData = _ancillaryData;
}
function priceDisputed(
bytes32 _identifier,
uint256 _timestamp,
bytes memory _ancillaryData,
uint256 _refund
) external override {
require(!shouldRevert);
identifier = _identifier;
timestamp = _timestamp;
ancillaryData = _ancillaryData;
refund = _refund;
}
function priceSettled(
bytes32 _identifier,
uint256 _timestamp,
bytes memory _ancillaryData,
int256 _price
) external override {
require(!shouldRevert);
identifier = _identifier;
timestamp = _timestamp;
ancillaryData = _ancillaryData;
price = _price;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../../common/implementation/FixedPoint.sol";
import "../../common/implementation/MultiRole.sol";
import "../../common/implementation/Withdrawable.sol";
import "../../common/implementation/Testable.sol";
import "../interfaces/StoreInterface.sol";
/**
* @title An implementation of Store that can accept Oracle fees in ETH or any arbitrary ERC20 token.
*/
contract Store is StoreInterface, Withdrawable, Testable {
using SafeMath for uint256;
using FixedPoint for FixedPoint.Unsigned;
using FixedPoint for uint256;
using SafeERC20 for IERC20;
/****************************************
* INTERNAL VARIABLES AND STORAGE *
****************************************/
enum Roles { Owner, Withdrawer }
FixedPoint.Unsigned public fixedOracleFeePerSecondPerPfc; // Percentage of 1 E.g., .1 is 10% Oracle fee.
FixedPoint.Unsigned public weeklyDelayFeePerSecondPerPfc; // Percentage of 1 E.g., .1 is 10% weekly delay fee.
mapping(address => FixedPoint.Unsigned) public finalFees;
uint256 public constant SECONDS_PER_WEEK = 604800;
/****************************************
* EVENTS *
****************************************/
event NewFixedOracleFeePerSecondPerPfc(FixedPoint.Unsigned newOracleFee);
event NewWeeklyDelayFeePerSecondPerPfc(FixedPoint.Unsigned newWeeklyDelayFeePerSecondPerPfc);
event NewFinalFee(FixedPoint.Unsigned newFinalFee);
/**
* @notice Construct the Store contract.
*/
constructor(
FixedPoint.Unsigned memory _fixedOracleFeePerSecondPerPfc,
FixedPoint.Unsigned memory _weeklyDelayFeePerSecondPerPfc,
address _timerAddress
) Testable(_timerAddress) {
_createExclusiveRole(uint256(Roles.Owner), uint256(Roles.Owner), msg.sender);
_createWithdrawRole(uint256(Roles.Withdrawer), uint256(Roles.Owner), msg.sender);
setFixedOracleFeePerSecondPerPfc(_fixedOracleFeePerSecondPerPfc);
setWeeklyDelayFeePerSecondPerPfc(_weeklyDelayFeePerSecondPerPfc);
}
/****************************************
* ORACLE FEE CALCULATION AND PAYMENT *
****************************************/
/**
* @notice Pays Oracle fees in ETH to the store.
* @dev To be used by contracts whose margin currency is ETH.
*/
function payOracleFees() external payable override {
require(msg.value > 0, "Value sent can't be zero");
}
/**
* @notice Pays oracle fees in the margin currency, erc20Address, to the store.
* @dev To be used if the margin currency is an ERC20 token rather than ETH.
* @param erc20Address address of the ERC20 token used to pay the fee.
* @param amount number of tokens to transfer. An approval for at least this amount must exist.
*/
function payOracleFeesErc20(address erc20Address, FixedPoint.Unsigned calldata amount) external override {
IERC20 erc20 = IERC20(erc20Address);
require(amount.isGreaterThan(0), "Amount sent can't be zero");
erc20.safeTransferFrom(msg.sender, address(this), amount.rawValue);
}
/**
* @notice Computes the regular oracle fees that a contract should pay for a period.
* @dev The late penalty is similar to the regular fee in that is is charged per second over the period between
* startTime and endTime.
*
* The late penalty percentage increases over time as follows:
*
* - 0-1 week since startTime: no late penalty
*
* - 1-2 weeks since startTime: 1x late penalty percentage is applied
*
* - 2-3 weeks since startTime: 2x late penalty percentage is applied
*
* - ...
*
* @param startTime defines the beginning time from which the fee is paid.
* @param endTime end time until which the fee is paid.
* @param pfc "profit from corruption", or the maximum amount of margin currency that a
* token sponsor could extract from the contract through corrupting the price feed in their favor.
* @return regularFee amount owed for the duration from start to end time for the given pfc.
* @return latePenalty penalty percentage, if any, for paying the fee after the deadline.
*/
function computeRegularFee(
uint256 startTime,
uint256 endTime,
FixedPoint.Unsigned calldata pfc
) external view override returns (FixedPoint.Unsigned memory regularFee, FixedPoint.Unsigned memory latePenalty) {
uint256 timeDiff = endTime.sub(startTime);
// Multiply by the unscaled `timeDiff` first, to get more accurate results.
regularFee = pfc.mul(timeDiff).mul(fixedOracleFeePerSecondPerPfc);
// Compute how long ago the start time was to compute the delay penalty.
uint256 paymentDelay = getCurrentTime().sub(startTime);
// Compute the additional percentage (per second) that will be charged because of the penalty.
// Note: if less than a week has gone by since the startTime, paymentDelay / SECONDS_PER_WEEK will truncate to
// 0, causing no penalty to be charged.
FixedPoint.Unsigned memory penaltyPercentagePerSecond =
weeklyDelayFeePerSecondPerPfc.mul(paymentDelay.div(SECONDS_PER_WEEK));
// Apply the penaltyPercentagePerSecond to the payment period.
latePenalty = pfc.mul(timeDiff).mul(penaltyPercentagePerSecond);
}
/**
* @notice Computes the final oracle fees that a contract should pay at settlement.
* @param currency token used to pay the final fee.
* @return finalFee amount due denominated in units of `currency`.
*/
function computeFinalFee(address currency) external view override returns (FixedPoint.Unsigned memory) {
return finalFees[currency];
}
/****************************************
* ADMIN STATE MODIFYING FUNCTIONS *
****************************************/
/**
* @notice Sets a new oracle fee per second.
* @param newFixedOracleFeePerSecondPerPfc new fee per second charged to use the oracle.
*/
function setFixedOracleFeePerSecondPerPfc(FixedPoint.Unsigned memory newFixedOracleFeePerSecondPerPfc)
public
onlyRoleHolder(uint256(Roles.Owner))
{
// Oracle fees at or over 100% don't make sense.
require(newFixedOracleFeePerSecondPerPfc.isLessThan(1), "Fee must be < 100% per second.");
fixedOracleFeePerSecondPerPfc = newFixedOracleFeePerSecondPerPfc;
emit NewFixedOracleFeePerSecondPerPfc(newFixedOracleFeePerSecondPerPfc);
}
/**
* @notice Sets a new weekly delay fee.
* @param newWeeklyDelayFeePerSecondPerPfc fee escalation per week of late fee payment.
*/
function setWeeklyDelayFeePerSecondPerPfc(FixedPoint.Unsigned memory newWeeklyDelayFeePerSecondPerPfc)
public
onlyRoleHolder(uint256(Roles.Owner))
{
require(newWeeklyDelayFeePerSecondPerPfc.isLessThan(1), "weekly delay fee must be < 100%");
weeklyDelayFeePerSecondPerPfc = newWeeklyDelayFeePerSecondPerPfc;
emit NewWeeklyDelayFeePerSecondPerPfc(newWeeklyDelayFeePerSecondPerPfc);
}
/**
* @notice Sets a new final fee for a particular currency.
* @param currency defines the token currency used to pay the final fee.
* @param newFinalFee final fee amount.
*/
function setFinalFee(address currency, FixedPoint.Unsigned memory newFinalFee)
public
onlyRoleHolder(uint256(Roles.Owner))
{
finalFees[currency] = newFinalFee;
emit NewFinalFee(newFinalFee);
}
}
/**
* Withdrawable contract.
*/
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "./MultiRole.sol";
/**
* @title Base contract that allows a specific role to withdraw any ETH and/or ERC20 tokens that the contract holds.
*/
abstract contract Withdrawable is MultiRole {
using SafeERC20 for IERC20;
uint256 private roleId;
/**
* @notice Withdraws ETH from the contract.
*/
function withdraw(uint256 amount) external onlyRoleHolder(roleId) {
Address.sendValue(payable(msg.sender), amount);
}
/**
* @notice Withdraws ERC20 tokens from the contract.
* @param erc20Address ERC20 token to withdraw.
* @param amount amount of tokens to withdraw.
*/
function withdrawErc20(address erc20Address, uint256 amount) external onlyRoleHolder(roleId) {
IERC20 erc20 = IERC20(erc20Address);
erc20.safeTransfer(msg.sender, amount);
}
/**
* @notice Internal method that allows derived contracts to create a role for withdrawal.
* @dev Either this method or `_setWithdrawRole` must be called by the derived class for this contract to function
* properly.
* @param newRoleId ID corresponding to role whose members can withdraw.
* @param managingRoleId ID corresponding to managing role who can modify the withdrawable role's membership.
* @param withdrawerAddress new manager of withdrawable role.
*/
function _createWithdrawRole(
uint256 newRoleId,
uint256 managingRoleId,
address withdrawerAddress
) internal {
roleId = newRoleId;
_createExclusiveRole(newRoleId, managingRoleId, withdrawerAddress);
}
/**
* @notice Internal method that allows derived contracts to choose the role for withdrawal.
* @dev The role `setRoleId` must exist. Either this method or `_createWithdrawRole` must be
* called by the derived class for this contract to function properly.
* @param setRoleId ID corresponding to role whose members can withdraw.
*/
function _setWithdrawRole(uint256 setRoleId) internal onlyValidRole(setRoleId) {
roleId = setRoleId;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../../common/implementation/Lockable.sol";
import "../../common/implementation/FixedPoint.sol";
import "../../common/implementation/Testable.sol";
import "../../oracle/interfaces/StoreInterface.sol";
import "../../oracle/interfaces/FinderInterface.sol";
import "../../oracle/interfaces/AdministrateeInterface.sol";
import "../../oracle/implementation/Constants.sol";
/**
* @title FeePayer contract.
* @notice Provides fee payment functionality for the ExpiringMultiParty contract.
* contract is abstract as each derived contract that inherits `FeePayer` must implement `pfc()`.
*/
abstract contract FeePayer is AdministrateeInterface, Testable, Lockable {
using SafeMath for uint256;
using FixedPoint for FixedPoint.Unsigned;
using SafeERC20 for IERC20;
/****************************************
* FEE PAYER DATA STRUCTURES *
****************************************/
// The collateral currency used to back the positions in this contract.
IERC20 public collateralCurrency;
// Finder contract used to look up addresses for UMA system contracts.
FinderInterface public finder;
// Tracks the last block time when the fees were paid.
uint256 private lastPaymentTime;
// Tracks the cumulative fees that have been paid by the contract for use by derived contracts.
// The multiplier starts at 1, and is updated by computing cumulativeFeeMultiplier * (1 - effectiveFee).
// Put another way, the cumulativeFeeMultiplier is (1 - effectiveFee1) * (1 - effectiveFee2) ...
// For example:
// The cumulativeFeeMultiplier should start at 1.
// If a 1% fee is charged, the multiplier should update to .99.
// If another 1% fee is charged, the multiplier should be 0.99^2 (0.9801).
FixedPoint.Unsigned public cumulativeFeeMultiplier;
/****************************************
* EVENTS *
****************************************/
event RegularFeesPaid(uint256 indexed regularFee, uint256 indexed lateFee);
event FinalFeesPaid(uint256 indexed amount);
/****************************************
* MODIFIERS *
****************************************/
// modifier that calls payRegularFees().
modifier fees virtual {
// Note: the regular fee is applied on every fee-accruing transaction, where the total change is simply the
// regular fee applied linearly since the last update. This implies that the compounding rate depends on the
// frequency of update transactions that have this modifier, and it never reaches the ideal of continuous
// compounding. This approximate-compounding pattern is common in the Ethereum ecosystem because of the
// complexity of compounding data on-chain.
payRegularFees();
_;
}
/**
* @notice Constructs the FeePayer contract. Called by child contracts.
* @param _collateralAddress ERC20 token that is used as the underlying collateral for the synthetic.
* @param _finderAddress UMA protocol Finder used to discover other protocol contracts.
* @param _timerAddress Contract that stores the current time in a testing environment.
* Must be set to 0x0 for production environments that use live time.
*/
constructor(
address _collateralAddress,
address _finderAddress,
address _timerAddress
) Testable(_timerAddress) {
collateralCurrency = IERC20(_collateralAddress);
finder = FinderInterface(_finderAddress);
lastPaymentTime = getCurrentTime();
cumulativeFeeMultiplier = FixedPoint.fromUnscaledUint(1);
}
/****************************************
* FEE PAYMENT FUNCTIONS *
****************************************/
/**
* @notice Pays UMA DVM regular fees (as a % of the collateral pool) to the Store contract.
* @dev These must be paid periodically for the life of the contract. If the contract has not paid its regular fee
* in a week or more then a late penalty is applied which is sent to the caller. If the amount of
* fees owed are greater than the pfc, then this will pay as much as possible from the available collateral.
* An event is only fired if the fees charged are greater than 0.
* @return totalPaid Amount of collateral that the contract paid (sum of the amount paid to the Store and caller).
* This returns 0 and exit early if there is no pfc, fees were already paid during the current block, or the fee rate is 0.
*/
function payRegularFees() public nonReentrant() returns (FixedPoint.Unsigned memory) {
uint256 time = getCurrentTime();
FixedPoint.Unsigned memory collateralPool = _pfc();
// Fetch the regular fees, late penalty and the max possible to pay given the current collateral within the contract.
(
FixedPoint.Unsigned memory regularFee,
FixedPoint.Unsigned memory latePenalty,
FixedPoint.Unsigned memory totalPaid
) = getOutstandingRegularFees(time);
lastPaymentTime = time;
// If there are no fees to pay then exit early.
if (totalPaid.isEqual(0)) {
return totalPaid;
}
emit RegularFeesPaid(regularFee.rawValue, latePenalty.rawValue);
_adjustCumulativeFeeMultiplier(totalPaid, collateralPool);
if (regularFee.isGreaterThan(0)) {
StoreInterface store = _getStore();
collateralCurrency.safeIncreaseAllowance(address(store), regularFee.rawValue);
store.payOracleFeesErc20(address(collateralCurrency), regularFee);
}
if (latePenalty.isGreaterThan(0)) {
collateralCurrency.safeTransfer(msg.sender, latePenalty.rawValue);
}
return totalPaid;
}
/**
* @notice Fetch any regular fees that the contract has pending but has not yet paid. If the fees to be paid are more
* than the total collateral within the contract then the totalPaid returned is full contract collateral amount.
* @dev This returns 0 and exit early if there is no pfc, fees were already paid during the current block, or the fee rate is 0.
* @return regularFee outstanding unpaid regular fee.
* @return latePenalty outstanding unpaid late fee for being late in previous fee payments.
* @return totalPaid Amount of collateral that the contract paid (sum of the amount paid to the Store and caller).
*/
function getOutstandingRegularFees(uint256 time)
public
view
returns (
FixedPoint.Unsigned memory regularFee,
FixedPoint.Unsigned memory latePenalty,
FixedPoint.Unsigned memory totalPaid
)
{
StoreInterface store = _getStore();
FixedPoint.Unsigned memory collateralPool = _pfc();
// Exit early if there is no collateral or if fees were already paid during this block.
if (collateralPool.isEqual(0) || lastPaymentTime == time) {
return (regularFee, latePenalty, totalPaid);
}
(regularFee, latePenalty) = store.computeRegularFee(lastPaymentTime, time, collateralPool);
totalPaid = regularFee.add(latePenalty);
if (totalPaid.isEqual(0)) {
return (regularFee, latePenalty, totalPaid);
}
// If the effective fees paid as a % of the pfc is > 100%, then we need to reduce it and make the contract pay
// as much of the fee that it can (up to 100% of its pfc). We'll reduce the late penalty first and then the
// regular fee, which has the effect of paying the store first, followed by the caller if there is any fee remaining.
if (totalPaid.isGreaterThan(collateralPool)) {
FixedPoint.Unsigned memory deficit = totalPaid.sub(collateralPool);
FixedPoint.Unsigned memory latePenaltyReduction = FixedPoint.min(latePenalty, deficit);
latePenalty = latePenalty.sub(latePenaltyReduction);
deficit = deficit.sub(latePenaltyReduction);
regularFee = regularFee.sub(FixedPoint.min(regularFee, deficit));
totalPaid = collateralPool;
}
}
/**
* @notice Gets the current profit from corruption for this contract in terms of the collateral currency.
* @dev This is equivalent to the collateral pool available from which to pay fees. Therefore, derived contracts are
* expected to implement this so that pay-fee methods can correctly compute the owed fees as a % of PfC.
* @return pfc value for equal to the current profit from corruption denominated in collateral currency.
*/
function pfc() external view override nonReentrantView() returns (FixedPoint.Unsigned memory) {
return _pfc();
}
/**
* @notice Removes excess collateral balance not counted in the PfC by distributing it out pro-rata to all sponsors.
* @dev Multiplying the `cumulativeFeeMultiplier` by the ratio of non-PfC-collateral :: PfC-collateral effectively
* pays all sponsors a pro-rata portion of the excess collateral.
* @dev This will revert if PfC is 0 and this contract's collateral balance > 0.
*/
function gulp() external nonReentrant() {
_gulp();
}
/****************************************
* INTERNAL FUNCTIONS *
****************************************/
// Pays UMA Oracle final fees of `amount` in `collateralCurrency` to the Store contract. Final fee is a flat fee
// charged for each price request. If payer is the contract, adjusts internal bookkeeping variables. If payer is not
// the contract, pulls in `amount` of collateral currency.
function _payFinalFees(address payer, FixedPoint.Unsigned memory amount) internal {
if (amount.isEqual(0)) {
return;
}
if (payer != address(this)) {
// If the payer is not the contract pull the collateral from the payer.
collateralCurrency.safeTransferFrom(payer, address(this), amount.rawValue);
} else {
// If the payer is the contract, adjust the cumulativeFeeMultiplier to compensate.
FixedPoint.Unsigned memory collateralPool = _pfc();
// The final fee must be < available collateral or the fee will be larger than 100%.
// Note: revert reason removed to save bytecode.
require(collateralPool.isGreaterThan(amount));
_adjustCumulativeFeeMultiplier(amount, collateralPool);
}
emit FinalFeesPaid(amount.rawValue);
StoreInterface store = _getStore();
collateralCurrency.safeIncreaseAllowance(address(store), amount.rawValue);
store.payOracleFeesErc20(address(collateralCurrency), amount);
}
function _gulp() internal {
FixedPoint.Unsigned memory currentPfc = _pfc();
FixedPoint.Unsigned memory currentBalance = FixedPoint.Unsigned(collateralCurrency.balanceOf(address(this)));
if (currentPfc.isLessThan(currentBalance)) {
cumulativeFeeMultiplier = cumulativeFeeMultiplier.mul(currentBalance.div(currentPfc));
}
}
function _pfc() internal view virtual returns (FixedPoint.Unsigned memory);
function _getStore() internal view returns (StoreInterface) {
return StoreInterface(finder.getImplementationAddress(OracleInterfaces.Store));
}
function _computeFinalFees() internal view returns (FixedPoint.Unsigned memory finalFees) {
StoreInterface store = _getStore();
return store.computeFinalFee(address(collateralCurrency));
}
// Returns the user's collateral minus any fees that have been subtracted since it was originally
// deposited into the contract. Note: if the contract has paid fees since it was deployed, the raw
// value should be larger than the returned value.
function _getFeeAdjustedCollateral(FixedPoint.Unsigned memory rawCollateral)
internal
view
returns (FixedPoint.Unsigned memory collateral)
{
return rawCollateral.mul(cumulativeFeeMultiplier);
}
// Returns the user's collateral minus any pending fees that have yet to be subtracted.
function _getPendingRegularFeeAdjustedCollateral(FixedPoint.Unsigned memory rawCollateral)
internal
view
returns (FixedPoint.Unsigned memory)
{
(, , FixedPoint.Unsigned memory currentTotalOutstandingRegularFees) =
getOutstandingRegularFees(getCurrentTime());
if (currentTotalOutstandingRegularFees.isEqual(FixedPoint.fromUnscaledUint(0))) return rawCollateral;
// Calculate the total outstanding regular fee as a fraction of the total contract PFC.
FixedPoint.Unsigned memory effectiveOutstandingFee = currentTotalOutstandingRegularFees.divCeil(_pfc());
// Scale as rawCollateral* (1 - effectiveOutstandingFee) to apply the pro-rata amount to the regular fee.
return rawCollateral.mul(FixedPoint.fromUnscaledUint(1).sub(effectiveOutstandingFee));
}
// Converts a user-readable collateral value into a raw value that accounts for already-assessed fees. If any fees
// have been taken from this contract in the past, then the raw value will be larger than the user-readable value.
function _convertToRawCollateral(FixedPoint.Unsigned memory collateral)
internal
view
returns (FixedPoint.Unsigned memory rawCollateral)
{
return collateral.div(cumulativeFeeMultiplier);
}
// Decrease rawCollateral by a fee-adjusted collateralToRemove amount. Fee adjustment scales up collateralToRemove
// by dividing it by cumulativeFeeMultiplier. There is potential for this quotient to be floored, therefore
// rawCollateral is decreased by less than expected. Because this method is usually called in conjunction with an
// actual removal of collateral from this contract, return the fee-adjusted amount that the rawCollateral is
// decreased by so that the caller can minimize error between collateral removed and rawCollateral debited.
function _removeCollateral(FixedPoint.Unsigned storage rawCollateral, FixedPoint.Unsigned memory collateralToRemove)
internal
returns (FixedPoint.Unsigned memory removedCollateral)
{
FixedPoint.Unsigned memory initialBalance = _getFeeAdjustedCollateral(rawCollateral);
FixedPoint.Unsigned memory adjustedCollateral = _convertToRawCollateral(collateralToRemove);
rawCollateral.rawValue = rawCollateral.sub(adjustedCollateral).rawValue;
removedCollateral = initialBalance.sub(_getFeeAdjustedCollateral(rawCollateral));
}
// Increase rawCollateral by a fee-adjusted collateralToAdd amount. Fee adjustment scales up collateralToAdd
// by dividing it by cumulativeFeeMultiplier. There is potential for this quotient to be floored, therefore
// rawCollateral is increased by less than expected. Because this method is usually called in conjunction with an
// actual addition of collateral to this contract, return the fee-adjusted amount that the rawCollateral is
// increased by so that the caller can minimize error between collateral added and rawCollateral credited.
// NOTE: This return value exists only for the sake of symmetry with _removeCollateral. We don't actually use it
// because we are OK if more collateral is stored in the contract than is represented by rawTotalPositionCollateral.
function _addCollateral(FixedPoint.Unsigned storage rawCollateral, FixedPoint.Unsigned memory collateralToAdd)
internal
returns (FixedPoint.Unsigned memory addedCollateral)
{
FixedPoint.Unsigned memory initialBalance = _getFeeAdjustedCollateral(rawCollateral);
FixedPoint.Unsigned memory adjustedCollateral = _convertToRawCollateral(collateralToAdd);
rawCollateral.rawValue = rawCollateral.add(adjustedCollateral).rawValue;
addedCollateral = _getFeeAdjustedCollateral(rawCollateral).sub(initialBalance);
}
// Scale the cumulativeFeeMultiplier by the ratio of fees paid to the current available collateral.
function _adjustCumulativeFeeMultiplier(FixedPoint.Unsigned memory amount, FixedPoint.Unsigned memory currentPfc)
internal
{
FixedPoint.Unsigned memory effectiveFee = amount.divCeil(currentPfc);
cumulativeFeeMultiplier = cumulativeFeeMultiplier.mul(FixedPoint.fromUnscaledUint(1).sub(effectiveFee));
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/FixedPoint.sol";
/**
* @title Interface that all financial contracts expose to the admin.
*/
interface AdministrateeInterface {
/**
* @notice Initiates the shutdown process, in case of an emergency.
*/
function emergencyShutdown() external;
/**
* @notice A core contract method called independently or as a part of other financial contract transactions.
* @dev It pays fees and moves money between margin accounts to make sure they reflect the NAV of the contract.
*/
function remargin() external;
/**
* @notice Gets the current profit from corruption for this contract in terms of the collateral currency.
* @dev This is equivalent to the collateral pool available from which to pay fees. Therefore, derived contracts are
* expected to implement this so that pay-fee methods can correctly compute the owed fees as a % of PfC.
* @return pfc value for equal to the current profit from corruption denominated in collateral currency.
*/
function pfc() external view returns (FixedPoint.Unsigned memory);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "../../common/implementation/FixedPoint.sol";
import "../../common/interfaces/ExpandedIERC20.sol";
import "../../common/interfaces/IERC20Standard.sol";
import "../../oracle/interfaces/OracleInterface.sol";
import "../../oracle/interfaces/OptimisticOracleInterface.sol";
import "../../oracle/interfaces/IdentifierWhitelistInterface.sol";
import "../../oracle/implementation/Constants.sol";
import "../common/FeePayer.sol";
import "../common/financial-product-libraries/FinancialProductLibrary.sol";
/**
* @title Financial contract with priceless position management.
* @notice Handles positions for multiple sponsors in an optimistic (i.e., priceless) way without relying
* on a price feed. On construction, deploys a new ERC20, managed by this contract, that is the synthetic token.
*/
contract PricelessPositionManager is FeePayer {
using SafeMath for uint256;
using FixedPoint for FixedPoint.Unsigned;
using SafeERC20 for IERC20;
using SafeERC20 for ExpandedIERC20;
using Address for address;
/****************************************
* PRICELESS POSITION DATA STRUCTURES *
****************************************/
// Stores the state of the PricelessPositionManager. Set on expiration, emergency shutdown, or settlement.
enum ContractState { Open, ExpiredPriceRequested, ExpiredPriceReceived }
ContractState public contractState;
// Represents a single sponsor's position. All collateral is held by this contract.
// This struct acts as bookkeeping for how much of that collateral is allocated to each sponsor.
struct PositionData {
FixedPoint.Unsigned tokensOutstanding;
// Tracks pending withdrawal requests. A withdrawal request is pending if `withdrawalRequestPassTimestamp != 0`.
uint256 withdrawalRequestPassTimestamp;
FixedPoint.Unsigned withdrawalRequestAmount;
// Raw collateral value. This value should never be accessed directly -- always use _getFeeAdjustedCollateral().
// To add or remove collateral, use _addCollateral() and _removeCollateral().
FixedPoint.Unsigned rawCollateral;
// Tracks pending transfer position requests. A transfer position request is pending if `transferPositionRequestPassTimestamp != 0`.
uint256 transferPositionRequestPassTimestamp;
}
// Maps sponsor addresses to their positions. Each sponsor can have only one position.
mapping(address => PositionData) public positions;
// Keep track of the total collateral and tokens across all positions to enable calculating the
// global collateralization ratio without iterating over all positions.
FixedPoint.Unsigned public totalTokensOutstanding;
// Similar to the rawCollateral in PositionData, this value should not be used directly.
// _getFeeAdjustedCollateral(), _addCollateral() and _removeCollateral() must be used to access and adjust.
FixedPoint.Unsigned public rawTotalPositionCollateral;
// Synthetic token created by this contract.
ExpandedIERC20 public tokenCurrency;
// Unique identifier for DVM price feed ticker.
bytes32 public priceIdentifier;
// Time that this contract expires. Should not change post-construction unless an emergency shutdown occurs.
uint256 public expirationTimestamp;
// Time that has to elapse for a withdrawal request to be considered passed, if no liquidations occur.
// !!Note: The lower the withdrawal liveness value, the more risk incurred by the contract.
// Extremely low liveness values increase the chance that opportunistic invalid withdrawal requests
// expire without liquidation, thereby increasing the insolvency risk for the contract as a whole. An insolvent
// contract is extremely risky for any sponsor or synthetic token holder for the contract.
uint256 public withdrawalLiveness;
// Minimum number of tokens in a sponsor's position.
FixedPoint.Unsigned public minSponsorTokens;
// The expiry price pulled from the DVM.
FixedPoint.Unsigned public expiryPrice;
// Instance of FinancialProductLibrary to provide custom price and collateral requirement transformations to extend
// the functionality of the EMP to support a wider range of financial products.
FinancialProductLibrary public financialProductLibrary;
/****************************************
* EVENTS *
****************************************/
event RequestTransferPosition(address indexed oldSponsor);
event RequestTransferPositionExecuted(address indexed oldSponsor, address indexed newSponsor);
event RequestTransferPositionCanceled(address indexed oldSponsor);
event Deposit(address indexed sponsor, uint256 indexed collateralAmount);
event Withdrawal(address indexed sponsor, uint256 indexed collateralAmount);
event RequestWithdrawal(address indexed sponsor, uint256 indexed collateralAmount);
event RequestWithdrawalExecuted(address indexed sponsor, uint256 indexed collateralAmount);
event RequestWithdrawalCanceled(address indexed sponsor, uint256 indexed collateralAmount);
event PositionCreated(address indexed sponsor, uint256 indexed collateralAmount, uint256 indexed tokenAmount);
event NewSponsor(address indexed sponsor);
event EndedSponsorPosition(address indexed sponsor);
event Repay(address indexed sponsor, uint256 indexed numTokensRepaid, uint256 indexed newTokenCount);
event Redeem(address indexed sponsor, uint256 indexed collateralAmount, uint256 indexed tokenAmount);
event ContractExpired(address indexed caller);
event SettleExpiredPosition(
address indexed caller,
uint256 indexed collateralReturned,
uint256 indexed tokensBurned
);
event EmergencyShutdown(address indexed caller, uint256 originalExpirationTimestamp, uint256 shutdownTimestamp);
/****************************************
* MODIFIERS *
****************************************/
modifier onlyPreExpiration() {
_onlyPreExpiration();
_;
}
modifier onlyPostExpiration() {
_onlyPostExpiration();
_;
}
modifier onlyCollateralizedPosition(address sponsor) {
_onlyCollateralizedPosition(sponsor);
_;
}
// Check that the current state of the pricelessPositionManager is Open.
// This prevents multiple calls to `expire` and `EmergencyShutdown` post expiration.
modifier onlyOpenState() {
_onlyOpenState();
_;
}
modifier noPendingWithdrawal(address sponsor) {
_positionHasNoPendingWithdrawal(sponsor);
_;
}
/**
* @notice Construct the PricelessPositionManager
* @dev Deployer of this contract should consider carefully which parties have ability to mint and burn
* the synthetic tokens referenced by `_tokenAddress`. This contract's security assumes that no external accounts
* can mint new tokens, which could be used to steal all of this contract's locked collateral.
* We recommend to only use synthetic token contracts whose sole Owner role (the role capable of adding & removing roles)
* is assigned to this contract, whose sole Minter role is assigned to this contract, and whose
* total supply is 0 prior to construction of this contract.
* @param _expirationTimestamp unix timestamp of when the contract will expire.
* @param _withdrawalLiveness liveness delay, in seconds, for pending withdrawals.
* @param _collateralAddress ERC20 token used as collateral for all positions.
* @param _tokenAddress ERC20 token used as synthetic token.
* @param _finderAddress UMA protocol Finder used to discover other protocol contracts.
* @param _priceIdentifier registered in the DVM for the synthetic.
* @param _minSponsorTokens minimum number of tokens that must exist at any time in a position.
* @param _timerAddress Contract that stores the current time in a testing environment.
* Must be set to 0x0 for production environments that use live time.
* @param _financialProductLibraryAddress Contract providing contract state transformations.
*/
constructor(
uint256 _expirationTimestamp,
uint256 _withdrawalLiveness,
address _collateralAddress,
address _tokenAddress,
address _finderAddress,
bytes32 _priceIdentifier,
FixedPoint.Unsigned memory _minSponsorTokens,
address _timerAddress,
address _financialProductLibraryAddress
) FeePayer(_collateralAddress, _finderAddress, _timerAddress) nonReentrant() {
require(_expirationTimestamp > getCurrentTime());
require(_getIdentifierWhitelist().isIdentifierSupported(_priceIdentifier));
expirationTimestamp = _expirationTimestamp;
withdrawalLiveness = _withdrawalLiveness;
tokenCurrency = ExpandedIERC20(_tokenAddress);
minSponsorTokens = _minSponsorTokens;
priceIdentifier = _priceIdentifier;
// Initialize the financialProductLibrary at the provided address.
financialProductLibrary = FinancialProductLibrary(_financialProductLibraryAddress);
}
/****************************************
* POSITION FUNCTIONS *
****************************************/
/**
* @notice Requests to transfer ownership of the caller's current position to a new sponsor address.
* Once the request liveness is passed, the sponsor can execute the transfer and specify the new sponsor.
* @dev The liveness length is the same as the withdrawal liveness.
*/
function requestTransferPosition() public onlyPreExpiration() nonReentrant() {
PositionData storage positionData = _getPositionData(msg.sender);
require(positionData.transferPositionRequestPassTimestamp == 0);
// Make sure the proposed expiration of this request is not post-expiry.
uint256 requestPassTime = getCurrentTime().add(withdrawalLiveness);
require(requestPassTime < expirationTimestamp);
// Update the position object for the user.
positionData.transferPositionRequestPassTimestamp = requestPassTime;
emit RequestTransferPosition(msg.sender);
}
/**
* @notice After a passed transfer position request (i.e., by a call to `requestTransferPosition` and waiting
* `withdrawalLiveness`), transfers ownership of the caller's current position to `newSponsorAddress`.
* @dev Transferring positions can only occur if the recipient does not already have a position.
* @param newSponsorAddress is the address to which the position will be transferred.
*/
function transferPositionPassedRequest(address newSponsorAddress)
public
onlyPreExpiration()
noPendingWithdrawal(msg.sender)
nonReentrant()
{
require(
_getFeeAdjustedCollateral(positions[newSponsorAddress].rawCollateral).isEqual(
FixedPoint.fromUnscaledUint(0)
)
);
PositionData storage positionData = _getPositionData(msg.sender);
require(
positionData.transferPositionRequestPassTimestamp != 0 &&
positionData.transferPositionRequestPassTimestamp <= getCurrentTime()
);
// Reset transfer request.
positionData.transferPositionRequestPassTimestamp = 0;
positions[newSponsorAddress] = positionData;
delete positions[msg.sender];
emit RequestTransferPositionExecuted(msg.sender, newSponsorAddress);
emit NewSponsor(newSponsorAddress);
emit EndedSponsorPosition(msg.sender);
}
/**
* @notice Cancels a pending transfer position request.
*/
function cancelTransferPosition() external onlyPreExpiration() nonReentrant() {
PositionData storage positionData = _getPositionData(msg.sender);
require(positionData.transferPositionRequestPassTimestamp != 0);
emit RequestTransferPositionCanceled(msg.sender);
// Reset withdrawal request.
positionData.transferPositionRequestPassTimestamp = 0;
}
/**
* @notice Transfers `collateralAmount` of `collateralCurrency` into the specified sponsor's position.
* @dev Increases the collateralization level of a position after creation. This contract must be approved to spend
* at least `collateralAmount` of `collateralCurrency`.
* @param sponsor the sponsor to credit the deposit to.
* @param collateralAmount total amount of collateral tokens to be sent to the sponsor's position.
*/
function depositTo(address sponsor, FixedPoint.Unsigned memory collateralAmount)
public
onlyPreExpiration()
noPendingWithdrawal(sponsor)
fees()
nonReentrant()
{
require(collateralAmount.isGreaterThan(0));
PositionData storage positionData = _getPositionData(sponsor);
// Increase the position and global collateral balance by collateral amount.
_incrementCollateralBalances(positionData, collateralAmount);
emit Deposit(sponsor, collateralAmount.rawValue);
// Move collateral currency from sender to contract.
collateralCurrency.safeTransferFrom(msg.sender, address(this), collateralAmount.rawValue);
}
/**
* @notice Transfers `collateralAmount` of `collateralCurrency` into the caller's position.
* @dev Increases the collateralization level of a position after creation. This contract must be approved to spend
* at least `collateralAmount` of `collateralCurrency`.
* @param collateralAmount total amount of collateral tokens to be sent to the sponsor's position.
*/
function deposit(FixedPoint.Unsigned memory collateralAmount) public {
// This is just a thin wrapper over depositTo that specified the sender as the sponsor.
depositTo(msg.sender, collateralAmount);
}
/**
* @notice Transfers `collateralAmount` of `collateralCurrency` from the sponsor's position to the sponsor.
* @dev Reverts if the withdrawal puts this position's collateralization ratio below the global collateralization
* ratio. In that case, use `requestWithdrawal`. Might not withdraw the full requested amount to account for precision loss.
* @param collateralAmount is the amount of collateral to withdraw.
* @return amountWithdrawn The actual amount of collateral withdrawn.
*/
function withdraw(FixedPoint.Unsigned memory collateralAmount)
public
onlyPreExpiration()
noPendingWithdrawal(msg.sender)
fees()
nonReentrant()
returns (FixedPoint.Unsigned memory amountWithdrawn)
{
require(collateralAmount.isGreaterThan(0));
PositionData storage positionData = _getPositionData(msg.sender);
// Decrement the sponsor's collateral and global collateral amounts. Check the GCR between decrement to ensure
// position remains above the GCR within the withdrawal. If this is not the case the caller must submit a request.
amountWithdrawn = _decrementCollateralBalancesCheckGCR(positionData, collateralAmount);
emit Withdrawal(msg.sender, amountWithdrawn.rawValue);
// Move collateral currency from contract to sender.
// Note: that we move the amount of collateral that is decreased from rawCollateral (inclusive of fees)
// instead of the user requested amount. This eliminates precision loss that could occur
// where the user withdraws more collateral than rawCollateral is decremented by.
collateralCurrency.safeTransfer(msg.sender, amountWithdrawn.rawValue);
}
/**
* @notice Starts a withdrawal request that, if passed, allows the sponsor to withdraw` from their position.
* @dev The request will be pending for `withdrawalLiveness`, during which the position can be liquidated.
* @param collateralAmount the amount of collateral requested to withdraw
*/
function requestWithdrawal(FixedPoint.Unsigned memory collateralAmount)
public
onlyPreExpiration()
noPendingWithdrawal(msg.sender)
nonReentrant()
{
PositionData storage positionData = _getPositionData(msg.sender);
require(
collateralAmount.isGreaterThan(0) &&
collateralAmount.isLessThanOrEqual(_getFeeAdjustedCollateral(positionData.rawCollateral))
);
// Make sure the proposed expiration of this request is not post-expiry.
uint256 requestPassTime = getCurrentTime().add(withdrawalLiveness);
require(requestPassTime < expirationTimestamp);
// Update the position object for the user.
positionData.withdrawalRequestPassTimestamp = requestPassTime;
positionData.withdrawalRequestAmount = collateralAmount;
emit RequestWithdrawal(msg.sender, collateralAmount.rawValue);
}
/**
* @notice After a passed withdrawal request (i.e., by a call to `requestWithdrawal` and waiting
* `withdrawalLiveness`), withdraws `positionData.withdrawalRequestAmount` of collateral currency.
* @dev Might not withdraw the full requested amount in order to account for precision loss or if the full requested
* amount exceeds the collateral in the position (due to paying fees).
* @return amountWithdrawn The actual amount of collateral withdrawn.
*/
function withdrawPassedRequest()
external
onlyPreExpiration()
fees()
nonReentrant()
returns (FixedPoint.Unsigned memory amountWithdrawn)
{
PositionData storage positionData = _getPositionData(msg.sender);
require(
positionData.withdrawalRequestPassTimestamp != 0 &&
positionData.withdrawalRequestPassTimestamp <= getCurrentTime()
);
// If withdrawal request amount is > position collateral, then withdraw the full collateral amount.
// This situation is possible due to fees charged since the withdrawal was originally requested.
FixedPoint.Unsigned memory amountToWithdraw = positionData.withdrawalRequestAmount;
if (positionData.withdrawalRequestAmount.isGreaterThan(_getFeeAdjustedCollateral(positionData.rawCollateral))) {
amountToWithdraw = _getFeeAdjustedCollateral(positionData.rawCollateral);
}
// Decrement the sponsor's collateral and global collateral amounts.
amountWithdrawn = _decrementCollateralBalances(positionData, amountToWithdraw);
// Reset withdrawal request by setting withdrawal amount and withdrawal timestamp to 0.
_resetWithdrawalRequest(positionData);
// Transfer approved withdrawal amount from the contract to the caller.
collateralCurrency.safeTransfer(msg.sender, amountWithdrawn.rawValue);
emit RequestWithdrawalExecuted(msg.sender, amountWithdrawn.rawValue);
}
/**
* @notice Cancels a pending withdrawal request.
*/
function cancelWithdrawal() external nonReentrant() {
PositionData storage positionData = _getPositionData(msg.sender);
require(positionData.withdrawalRequestPassTimestamp != 0);
emit RequestWithdrawalCanceled(msg.sender, positionData.withdrawalRequestAmount.rawValue);
// Reset withdrawal request by setting withdrawal amount and withdrawal timestamp to 0.
_resetWithdrawalRequest(positionData);
}
/**
* @notice Creates tokens by creating a new position or by augmenting an existing position. Pulls `collateralAmount` into the sponsor's position and mints `numTokens` of `tokenCurrency`.
* @dev Reverts if minting these tokens would put the position's collateralization ratio below the
* global collateralization ratio. This contract must be approved to spend at least `collateralAmount` of
* `collateralCurrency`.
* @dev This contract must have the Minter role for the `tokenCurrency`.
* @param collateralAmount is the number of collateral tokens to collateralize the position with
* @param numTokens is the number of tokens to mint from the position.
*/
function create(FixedPoint.Unsigned memory collateralAmount, FixedPoint.Unsigned memory numTokens)
public
onlyPreExpiration()
fees()
nonReentrant()
{
PositionData storage positionData = positions[msg.sender];
// Either the new create ratio or the resultant position CR must be above the current GCR.
require(
(_checkCollateralization(
_getFeeAdjustedCollateral(positionData.rawCollateral).add(collateralAmount),
positionData.tokensOutstanding.add(numTokens)
) || _checkCollateralization(collateralAmount, numTokens)),
"Insufficient collateral"
);
require(positionData.withdrawalRequestPassTimestamp == 0, "Pending withdrawal");
if (positionData.tokensOutstanding.isEqual(0)) {
require(numTokens.isGreaterThanOrEqual(minSponsorTokens), "Below minimum sponsor position");
emit NewSponsor(msg.sender);
}
// Increase the position and global collateral balance by collateral amount.
_incrementCollateralBalances(positionData, collateralAmount);
// Add the number of tokens created to the position's outstanding tokens.
positionData.tokensOutstanding = positionData.tokensOutstanding.add(numTokens);
totalTokensOutstanding = totalTokensOutstanding.add(numTokens);
emit PositionCreated(msg.sender, collateralAmount.rawValue, numTokens.rawValue);
// Transfer tokens into the contract from caller and mint corresponding synthetic tokens to the caller's address.
collateralCurrency.safeTransferFrom(msg.sender, address(this), collateralAmount.rawValue);
require(tokenCurrency.mint(msg.sender, numTokens.rawValue));
}
/**
* @notice Burns `numTokens` of `tokenCurrency` to decrease sponsors position size, without sending back `collateralCurrency`.
* This is done by a sponsor to increase position CR. Resulting size is bounded by minSponsorTokens.
* @dev Can only be called by token sponsor. This contract must be approved to spend `numTokens` of `tokenCurrency`.
* @dev This contract must have the Burner role for the `tokenCurrency`.
* @param numTokens is the number of tokens to be burnt from the sponsor's debt position.
*/
function repay(FixedPoint.Unsigned memory numTokens)
public
onlyPreExpiration()
noPendingWithdrawal(msg.sender)
fees()
nonReentrant()
{
PositionData storage positionData = _getPositionData(msg.sender);
require(numTokens.isLessThanOrEqual(positionData.tokensOutstanding));
// Decrease the sponsors position tokens size. Ensure it is above the min sponsor size.
FixedPoint.Unsigned memory newTokenCount = positionData.tokensOutstanding.sub(numTokens);
require(newTokenCount.isGreaterThanOrEqual(minSponsorTokens));
positionData.tokensOutstanding = newTokenCount;
// Update the totalTokensOutstanding after redemption.
totalTokensOutstanding = totalTokensOutstanding.sub(numTokens);
emit Repay(msg.sender, numTokens.rawValue, newTokenCount.rawValue);
// Transfer the tokens back from the sponsor and burn them.
tokenCurrency.safeTransferFrom(msg.sender, address(this), numTokens.rawValue);
tokenCurrency.burn(numTokens.rawValue);
}
/**
* @notice Burns `numTokens` of `tokenCurrency` and sends back the proportional amount of `collateralCurrency`.
* @dev Can only be called by a token sponsor. Might not redeem the full proportional amount of collateral
* in order to account for precision loss. This contract must be approved to spend at least `numTokens` of
* `tokenCurrency`.
* @dev This contract must have the Burner role for the `tokenCurrency`.
* @param numTokens is the number of tokens to be burnt for a commensurate amount of collateral.
* @return amountWithdrawn The actual amount of collateral withdrawn.
*/
function redeem(FixedPoint.Unsigned memory numTokens)
public
noPendingWithdrawal(msg.sender)
fees()
nonReentrant()
returns (FixedPoint.Unsigned memory amountWithdrawn)
{
PositionData storage positionData = _getPositionData(msg.sender);
require(!numTokens.isGreaterThan(positionData.tokensOutstanding));
FixedPoint.Unsigned memory fractionRedeemed = numTokens.div(positionData.tokensOutstanding);
FixedPoint.Unsigned memory collateralRedeemed =
fractionRedeemed.mul(_getFeeAdjustedCollateral(positionData.rawCollateral));
// If redemption returns all tokens the sponsor has then we can delete their position. Else, downsize.
if (positionData.tokensOutstanding.isEqual(numTokens)) {
amountWithdrawn = _deleteSponsorPosition(msg.sender);
} else {
// Decrement the sponsor's collateral and global collateral amounts.
amountWithdrawn = _decrementCollateralBalances(positionData, collateralRedeemed);
// Decrease the sponsors position tokens size. Ensure it is above the min sponsor size.
FixedPoint.Unsigned memory newTokenCount = positionData.tokensOutstanding.sub(numTokens);
require(newTokenCount.isGreaterThanOrEqual(minSponsorTokens), "Below minimum sponsor position");
positionData.tokensOutstanding = newTokenCount;
// Update the totalTokensOutstanding after redemption.
totalTokensOutstanding = totalTokensOutstanding.sub(numTokens);
}
emit Redeem(msg.sender, amountWithdrawn.rawValue, numTokens.rawValue);
// Transfer collateral from contract to caller and burn callers synthetic tokens.
collateralCurrency.safeTransfer(msg.sender, amountWithdrawn.rawValue);
tokenCurrency.safeTransferFrom(msg.sender, address(this), numTokens.rawValue);
tokenCurrency.burn(numTokens.rawValue);
}
/**
* @notice After a contract has passed expiry all token holders can redeem their tokens for underlying at the
* prevailing price defined by the DVM from the `expire` function.
* @dev This burns all tokens from the caller of `tokenCurrency` and sends back the proportional amount of
* `collateralCurrency`. Might not redeem the full proportional amount of collateral in order to account for
* precision loss. This contract must be approved to spend `tokenCurrency` at least up to the caller's full balance.
* @dev This contract must have the Burner role for the `tokenCurrency`.
* @return amountWithdrawn The actual amount of collateral withdrawn.
*/
function settleExpired()
external
onlyPostExpiration()
fees()
nonReentrant()
returns (FixedPoint.Unsigned memory amountWithdrawn)
{
// If the contract state is open and onlyPostExpiration passed then `expire()` has not yet been called.
require(contractState != ContractState.Open, "Unexpired position");
// Get the current settlement price and store it. If it is not resolved will revert.
if (contractState != ContractState.ExpiredPriceReceived) {
expiryPrice = _getOraclePriceExpiration(expirationTimestamp);
contractState = ContractState.ExpiredPriceReceived;
}
// Get caller's tokens balance and calculate amount of underlying entitled to them.
FixedPoint.Unsigned memory tokensToRedeem = FixedPoint.Unsigned(tokenCurrency.balanceOf(msg.sender));
FixedPoint.Unsigned memory totalRedeemableCollateral = tokensToRedeem.mul(expiryPrice);
// If the caller is a sponsor with outstanding collateral they are also entitled to their excess collateral after their debt.
PositionData storage positionData = positions[msg.sender];
if (_getFeeAdjustedCollateral(positionData.rawCollateral).isGreaterThan(0)) {
// Calculate the underlying entitled to a token sponsor. This is collateral - debt in underlying.
FixedPoint.Unsigned memory tokenDebtValueInCollateral = positionData.tokensOutstanding.mul(expiryPrice);
FixedPoint.Unsigned memory positionCollateral = _getFeeAdjustedCollateral(positionData.rawCollateral);
// If the debt is greater than the remaining collateral, they cannot redeem anything.
FixedPoint.Unsigned memory positionRedeemableCollateral =
tokenDebtValueInCollateral.isLessThan(positionCollateral)
? positionCollateral.sub(tokenDebtValueInCollateral)
: FixedPoint.Unsigned(0);
// Add the number of redeemable tokens for the sponsor to their total redeemable collateral.
totalRedeemableCollateral = totalRedeemableCollateral.add(positionRedeemableCollateral);
// Reset the position state as all the value has been removed after settlement.
delete positions[msg.sender];
emit EndedSponsorPosition(msg.sender);
}
// Take the min of the remaining collateral and the collateral "owed". If the contract is undercapitalized,
// the caller will get as much collateral as the contract can pay out.
FixedPoint.Unsigned memory payout =
FixedPoint.min(_getFeeAdjustedCollateral(rawTotalPositionCollateral), totalRedeemableCollateral);
// Decrement total contract collateral and outstanding debt.
amountWithdrawn = _removeCollateral(rawTotalPositionCollateral, payout);
totalTokensOutstanding = totalTokensOutstanding.sub(tokensToRedeem);
emit SettleExpiredPosition(msg.sender, amountWithdrawn.rawValue, tokensToRedeem.rawValue);
// Transfer tokens & collateral and burn the redeemed tokens.
collateralCurrency.safeTransfer(msg.sender, amountWithdrawn.rawValue);
tokenCurrency.safeTransferFrom(msg.sender, address(this), tokensToRedeem.rawValue);
tokenCurrency.burn(tokensToRedeem.rawValue);
}
/****************************************
* GLOBAL STATE FUNCTIONS *
****************************************/
/**
* @notice Locks contract state in expired and requests oracle price.
* @dev this function can only be called once the contract is expired and can't be re-called.
*/
function expire() external onlyPostExpiration() onlyOpenState() fees() nonReentrant() {
contractState = ContractState.ExpiredPriceRequested;
// Final fees do not need to be paid when sending a request to the optimistic oracle.
_requestOraclePriceExpiration(expirationTimestamp);
emit ContractExpired(msg.sender);
}
/**
* @notice Premature contract settlement under emergency circumstances.
* @dev Only the governor can call this function as they are permissioned within the `FinancialContractAdmin`.
* Upon emergency shutdown, the contract settlement time is set to the shutdown time. This enables withdrawal
* to occur via the standard `settleExpired` function. Contract state is set to `ExpiredPriceRequested`
* which prevents re-entry into this function or the `expire` function. No fees are paid when calling
* `emergencyShutdown` as the governor who would call the function would also receive the fees.
*/
function emergencyShutdown() external override onlyPreExpiration() onlyOpenState() nonReentrant() {
require(msg.sender == _getFinancialContractsAdminAddress());
contractState = ContractState.ExpiredPriceRequested;
// Expiratory time now becomes the current time (emergency shutdown time).
// Price requested at this time stamp. `settleExpired` can now withdraw at this timestamp.
uint256 oldExpirationTimestamp = expirationTimestamp;
expirationTimestamp = getCurrentTime();
_requestOraclePriceExpiration(expirationTimestamp);
emit EmergencyShutdown(msg.sender, oldExpirationTimestamp, expirationTimestamp);
}
/**
* @notice Theoretically supposed to pay fees and move money between margin accounts to make sure they
* reflect the NAV of the contract. However, this functionality doesn't apply to this contract.
* @dev This is supposed to be implemented by any contract that inherits `AdministrateeInterface` and callable
* only by the Governor contract. This method is therefore minimally implemented in this contract and does nothing.
*/
function remargin() external override onlyPreExpiration() nonReentrant() {
return;
}
/**
* @notice Accessor method for a sponsor's collateral.
* @dev This is necessary because the struct returned by the positions() method shows
* rawCollateral, which isn't a user-readable value.
* @dev This method accounts for pending regular fees that have not yet been withdrawn from this contract, for
* example if the `lastPaymentTime != currentTime`.
* @param sponsor address whose collateral amount is retrieved.
* @return collateralAmount amount of collateral within a sponsors position.
*/
function getCollateral(address sponsor) external view nonReentrantView() returns (FixedPoint.Unsigned memory) {
// Note: do a direct access to avoid the validity check.
return _getPendingRegularFeeAdjustedCollateral(_getFeeAdjustedCollateral(positions[sponsor].rawCollateral));
}
/**
* @notice Accessor method for the total collateral stored within the PricelessPositionManager.
* @return totalCollateral amount of all collateral within the Expiring Multi Party Contract.
* @dev This method accounts for pending regular fees that have not yet been withdrawn from this contract, for
* example if the `lastPaymentTime != currentTime`.
*/
function totalPositionCollateral() external view nonReentrantView() returns (FixedPoint.Unsigned memory) {
return _getPendingRegularFeeAdjustedCollateral(_getFeeAdjustedCollateral(rawTotalPositionCollateral));
}
/**
* @notice Accessor method to compute a transformed price using the finanicalProductLibrary specified at contract
* deployment. If no library was provided then no modification to the price is done.
* @param price input price to be transformed.
* @param requestTime timestamp the oraclePrice was requested at.
* @return transformedPrice price with the transformation function applied to it.
* @dev This method should never revert.
*/
function transformPrice(FixedPoint.Unsigned memory price, uint256 requestTime)
public
view
nonReentrantView()
returns (FixedPoint.Unsigned memory)
{
return _transformPrice(price, requestTime);
}
/**
* @notice Accessor method to compute a transformed price identifier using the finanicalProductLibrary specified
* at contract deployment. If no library was provided then no modification to the identifier is done.
* @param requestTime timestamp the identifier is to be used at.
* @return transformedPrice price with the transformation function applied to it.
* @dev This method should never revert.
*/
function transformPriceIdentifier(uint256 requestTime) public view nonReentrantView() returns (bytes32) {
return _transformPriceIdentifier(requestTime);
}
/****************************************
* INTERNAL FUNCTIONS *
****************************************/
// Reduces a sponsor's position and global counters by the specified parameters. Handles deleting the entire
// position if the entire position is being removed. Does not make any external transfers.
function _reduceSponsorPosition(
address sponsor,
FixedPoint.Unsigned memory tokensToRemove,
FixedPoint.Unsigned memory collateralToRemove,
FixedPoint.Unsigned memory withdrawalAmountToRemove
) internal {
PositionData storage positionData = _getPositionData(sponsor);
// If the entire position is being removed, delete it instead.
if (
tokensToRemove.isEqual(positionData.tokensOutstanding) &&
_getFeeAdjustedCollateral(positionData.rawCollateral).isEqual(collateralToRemove)
) {
_deleteSponsorPosition(sponsor);
return;
}
// Decrement the sponsor's collateral and global collateral amounts.
_decrementCollateralBalances(positionData, collateralToRemove);
// Ensure that the sponsor will meet the min position size after the reduction.
FixedPoint.Unsigned memory newTokenCount = positionData.tokensOutstanding.sub(tokensToRemove);
require(newTokenCount.isGreaterThanOrEqual(minSponsorTokens), "Below minimum sponsor position");
positionData.tokensOutstanding = newTokenCount;
// Decrement the position's withdrawal amount.
positionData.withdrawalRequestAmount = positionData.withdrawalRequestAmount.sub(withdrawalAmountToRemove);
// Decrement the total outstanding tokens in the overall contract.
totalTokensOutstanding = totalTokensOutstanding.sub(tokensToRemove);
}
// Deletes a sponsor's position and updates global counters. Does not make any external transfers.
function _deleteSponsorPosition(address sponsor) internal returns (FixedPoint.Unsigned memory) {
PositionData storage positionToLiquidate = _getPositionData(sponsor);
FixedPoint.Unsigned memory startingGlobalCollateral = _getFeeAdjustedCollateral(rawTotalPositionCollateral);
// Remove the collateral and outstanding from the overall total position.
FixedPoint.Unsigned memory remainingRawCollateral = positionToLiquidate.rawCollateral;
rawTotalPositionCollateral = rawTotalPositionCollateral.sub(remainingRawCollateral);
totalTokensOutstanding = totalTokensOutstanding.sub(positionToLiquidate.tokensOutstanding);
// Reset the sponsors position to have zero outstanding and collateral.
delete positions[sponsor];
emit EndedSponsorPosition(sponsor);
// Return fee-adjusted amount of collateral deleted from position.
return startingGlobalCollateral.sub(_getFeeAdjustedCollateral(rawTotalPositionCollateral));
}
function _pfc() internal view virtual override returns (FixedPoint.Unsigned memory) {
return _getFeeAdjustedCollateral(rawTotalPositionCollateral);
}
function _getPositionData(address sponsor)
internal
view
onlyCollateralizedPosition(sponsor)
returns (PositionData storage)
{
return positions[sponsor];
}
function _getIdentifierWhitelist() internal view returns (IdentifierWhitelistInterface) {
return IdentifierWhitelistInterface(finder.getImplementationAddress(OracleInterfaces.IdentifierWhitelist));
}
function _getOracle() internal view returns (OracleInterface) {
return OracleInterface(finder.getImplementationAddress(OracleInterfaces.Oracle));
}
function _getOptimisticOracle() internal view returns (OptimisticOracleInterface) {
return OptimisticOracleInterface(finder.getImplementationAddress(OracleInterfaces.OptimisticOracle));
}
function _getFinancialContractsAdminAddress() internal view returns (address) {
return finder.getImplementationAddress(OracleInterfaces.FinancialContractsAdmin);
}
// Requests a price for transformed `priceIdentifier` at `requestedTime` from the Oracle.
function _requestOraclePriceExpiration(uint256 requestedTime) internal {
OptimisticOracleInterface optimisticOracle = _getOptimisticOracle();
// Increase token allowance to enable the optimistic oracle reward transfer.
FixedPoint.Unsigned memory reward = _computeFinalFees();
collateralCurrency.safeIncreaseAllowance(address(optimisticOracle), reward.rawValue);
optimisticOracle.requestPrice(
_transformPriceIdentifier(requestedTime),
requestedTime,
_getAncillaryData(),
collateralCurrency,
reward.rawValue // Reward is equal to the final fee
);
// Apply haircut to all sponsors by decrementing the cumlativeFeeMultiplier by the amount lost from the final fee.
_adjustCumulativeFeeMultiplier(reward, _pfc());
}
// Fetches a resolved Oracle price from the Oracle. Reverts if the Oracle hasn't resolved for this request.
function _getOraclePriceExpiration(uint256 requestedTime) internal returns (FixedPoint.Unsigned memory) {
// Create an instance of the oracle and get the price. If the price is not resolved revert.
OptimisticOracleInterface optimisticOracle = _getOptimisticOracle();
require(
optimisticOracle.hasPrice(
address(this),
_transformPriceIdentifier(requestedTime),
requestedTime,
_getAncillaryData()
)
);
int256 optimisticOraclePrice =
optimisticOracle.settleAndGetPrice(
_transformPriceIdentifier(requestedTime),
requestedTime,
_getAncillaryData()
);
// For now we don't want to deal with negative prices in positions.
if (optimisticOraclePrice < 0) {
optimisticOraclePrice = 0;
}
return _transformPrice(FixedPoint.Unsigned(uint256(optimisticOraclePrice)), requestedTime);
}
// Requests a price for transformed `priceIdentifier` at `requestedTime` from the Oracle.
function _requestOraclePriceLiquidation(uint256 requestedTime) internal {
OracleInterface oracle = _getOracle();
oracle.requestPrice(_transformPriceIdentifier(requestedTime), requestedTime);
}
// Fetches a resolved Oracle price from the Oracle. Reverts if the Oracle hasn't resolved for this request.
function _getOraclePriceLiquidation(uint256 requestedTime) internal view returns (FixedPoint.Unsigned memory) {
// Create an instance of the oracle and get the price. If the price is not resolved revert.
OracleInterface oracle = _getOracle();
require(oracle.hasPrice(_transformPriceIdentifier(requestedTime), requestedTime), "Unresolved oracle price");
int256 oraclePrice = oracle.getPrice(_transformPriceIdentifier(requestedTime), requestedTime);
// For now we don't want to deal with negative prices in positions.
if (oraclePrice < 0) {
oraclePrice = 0;
}
return _transformPrice(FixedPoint.Unsigned(uint256(oraclePrice)), requestedTime);
}
// Reset withdrawal request by setting the withdrawal request and withdrawal timestamp to 0.
function _resetWithdrawalRequest(PositionData storage positionData) internal {
positionData.withdrawalRequestAmount = FixedPoint.fromUnscaledUint(0);
positionData.withdrawalRequestPassTimestamp = 0;
}
// Ensure individual and global consistency when increasing collateral balances. Returns the change to the position.
function _incrementCollateralBalances(
PositionData storage positionData,
FixedPoint.Unsigned memory collateralAmount
) internal returns (FixedPoint.Unsigned memory) {
_addCollateral(positionData.rawCollateral, collateralAmount);
return _addCollateral(rawTotalPositionCollateral, collateralAmount);
}
// Ensure individual and global consistency when decrementing collateral balances. Returns the change to the
// position. We elect to return the amount that the global collateral is decreased by, rather than the individual
// position's collateral, because we need to maintain the invariant that the global collateral is always
// <= the collateral owned by the contract to avoid reverts on withdrawals. The amount returned = amount withdrawn.
function _decrementCollateralBalances(
PositionData storage positionData,
FixedPoint.Unsigned memory collateralAmount
) internal returns (FixedPoint.Unsigned memory) {
_removeCollateral(positionData.rawCollateral, collateralAmount);
return _removeCollateral(rawTotalPositionCollateral, collateralAmount);
}
// Ensure individual and global consistency when decrementing collateral balances. Returns the change to the position.
// This function is similar to the _decrementCollateralBalances function except this function checks position GCR
// between the decrements. This ensures that collateral removal will not leave the position undercollateralized.
function _decrementCollateralBalancesCheckGCR(
PositionData storage positionData,
FixedPoint.Unsigned memory collateralAmount
) internal returns (FixedPoint.Unsigned memory) {
_removeCollateral(positionData.rawCollateral, collateralAmount);
require(_checkPositionCollateralization(positionData), "CR below GCR");
return _removeCollateral(rawTotalPositionCollateral, collateralAmount);
}
// These internal functions are supposed to act identically to modifiers, but re-used modifiers
// unnecessarily increase contract bytecode size.
// source: https://blog.polymath.network/solidity-tips-and-tricks-to-save-gas-and-reduce-bytecode-size-c44580b218e6
function _onlyOpenState() internal view {
require(contractState == ContractState.Open, "Contract state is not OPEN");
}
function _onlyPreExpiration() internal view {
require(getCurrentTime() < expirationTimestamp, "Only callable pre-expiry");
}
function _onlyPostExpiration() internal view {
require(getCurrentTime() >= expirationTimestamp, "Only callable post-expiry");
}
function _onlyCollateralizedPosition(address sponsor) internal view {
require(
_getFeeAdjustedCollateral(positions[sponsor].rawCollateral).isGreaterThan(0),
"Position has no collateral"
);
}
// Note: This checks whether an already existing position has a pending withdrawal. This cannot be used on the
// `create` method because it is possible that `create` is called on a new position (i.e. one without any collateral
// or tokens outstanding) which would fail the `onlyCollateralizedPosition` modifier on `_getPositionData`.
function _positionHasNoPendingWithdrawal(address sponsor) internal view {
require(_getPositionData(sponsor).withdrawalRequestPassTimestamp == 0, "Pending withdrawal");
}
/****************************************
* PRIVATE FUNCTIONS *
****************************************/
function _checkPositionCollateralization(PositionData storage positionData) private view returns (bool) {
return
_checkCollateralization(
_getFeeAdjustedCollateral(positionData.rawCollateral),
positionData.tokensOutstanding
);
}
// Checks whether the provided `collateral` and `numTokens` have a collateralization ratio above the global
// collateralization ratio.
function _checkCollateralization(FixedPoint.Unsigned memory collateral, FixedPoint.Unsigned memory numTokens)
private
view
returns (bool)
{
FixedPoint.Unsigned memory global =
_getCollateralizationRatio(_getFeeAdjustedCollateral(rawTotalPositionCollateral), totalTokensOutstanding);
FixedPoint.Unsigned memory thisChange = _getCollateralizationRatio(collateral, numTokens);
return !global.isGreaterThan(thisChange);
}
function _getCollateralizationRatio(FixedPoint.Unsigned memory collateral, FixedPoint.Unsigned memory numTokens)
private
pure
returns (FixedPoint.Unsigned memory ratio)
{
if (!numTokens.isGreaterThan(0)) {
return FixedPoint.fromUnscaledUint(0);
} else {
return collateral.div(numTokens);
}
}
// IERC20Standard.decimals() will revert if the collateral contract has not implemented the decimals() method,
// which is possible since the method is only an OPTIONAL method in the ERC20 standard:
// https://eips.ethereum.org/EIPS/eip-20#methods.
function _getSyntheticDecimals(address _collateralAddress) public view returns (uint8 decimals) {
try IERC20Standard(_collateralAddress).decimals() returns (uint8 _decimals) {
return _decimals;
} catch {
return 18;
}
}
function _transformPrice(FixedPoint.Unsigned memory price, uint256 requestTime)
internal
view
returns (FixedPoint.Unsigned memory)
{
if (!address(financialProductLibrary).isContract()) return price;
try financialProductLibrary.transformPrice(price, requestTime) returns (
FixedPoint.Unsigned memory transformedPrice
) {
return transformedPrice;
} catch {
return price;
}
}
function _transformPriceIdentifier(uint256 requestTime) internal view returns (bytes32) {
if (!address(financialProductLibrary).isContract()) return priceIdentifier;
try financialProductLibrary.transformPriceIdentifier(priceIdentifier, requestTime) returns (
bytes32 transformedIdentifier
) {
return transformedIdentifier;
} catch {
return priceIdentifier;
}
}
function _getAncillaryData() internal view returns (bytes memory) {
// Note: when ancillary data is passed to the optimistic oracle, it should be tagged with the token address
// whose funding rate it's trying to get.
return abi.encodePacked(address(tokenCurrency));
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
* @title ERC20 interface that includes the decimals read only method.
*/
interface IERC20Standard is IERC20 {
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should be displayed to a user as `5,05`
* (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between Ether and Wei. This is the value
* {ERC20} uses, unless {_setupDecimals} is called.
*
* NOTE: This information is only used for _display_ purposes: it in no way affects any of the arithmetic
* of the contract, including {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../../common/implementation/FixedPoint.sol";
interface ExpiringContractInterface {
function expirationTimestamp() external view returns (uint256);
}
/**
* @title Financial product library contract
* @notice Provides price and collateral requirement transformation interfaces that can be overridden by custom
* Financial product library implementations.
*/
abstract contract FinancialProductLibrary {
using FixedPoint for FixedPoint.Unsigned;
/**
* @notice Transforms a given oracle price using the financial product libraries transformation logic.
* @param oraclePrice input price returned by the DVM to be transformed.
* @param requestTime timestamp the oraclePrice was requested at.
* @return transformedOraclePrice input oraclePrice with the transformation function applied.
*/
function transformPrice(FixedPoint.Unsigned memory oraclePrice, uint256 requestTime)
public
view
virtual
returns (FixedPoint.Unsigned memory)
{
return oraclePrice;
}
/**
* @notice Transforms a given collateral requirement using the financial product libraries transformation logic.
* @param oraclePrice input price returned by DVM used to transform the collateral requirement.
* @param collateralRequirement input collateral requirement to be transformed.
* @return transformedCollateralRequirement input collateral requirement with the transformation function applied.
*/
function transformCollateralRequirement(
FixedPoint.Unsigned memory oraclePrice,
FixedPoint.Unsigned memory collateralRequirement
) public view virtual returns (FixedPoint.Unsigned memory) {
return collateralRequirement;
}
/**
* @notice Transforms a given price identifier using the financial product libraries transformation logic.
* @param priceIdentifier input price identifier defined for the financial contract.
* @param requestTime timestamp the identifier is to be used at. EG the time that a price request would be sent using this identifier.
* @return transformedPriceIdentifier input price identifier with the transformation function applied.
*/
function transformPriceIdentifier(bytes32 priceIdentifier, uint256 requestTime)
public
view
virtual
returns (bytes32)
{
return priceIdentifier;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../common/financial-product-libraries/FinancialProductLibrary.sol";
// Implements a simple FinancialProductLibrary to test price and collateral requirement transoformations.
contract FinancialProductLibraryTest is FinancialProductLibrary {
using FixedPoint for FixedPoint.Unsigned;
FixedPoint.Unsigned public priceTransformationScalar;
FixedPoint.Unsigned public collateralRequirementTransformationScalar;
bytes32 public transformedPriceIdentifier;
bool public shouldRevert;
constructor(
FixedPoint.Unsigned memory _priceTransformationScalar,
FixedPoint.Unsigned memory _collateralRequirementTransformationScalar,
bytes32 _transformedPriceIdentifier
) {
priceTransformationScalar = _priceTransformationScalar;
collateralRequirementTransformationScalar = _collateralRequirementTransformationScalar;
transformedPriceIdentifier = _transformedPriceIdentifier;
}
// Set the mocked methods to revert to test failed library computation.
function setShouldRevert(bool _shouldRevert) public {
shouldRevert = _shouldRevert;
}
// Create a simple price transformation function that scales the input price by the scalar for testing.
function transformPrice(FixedPoint.Unsigned memory oraclePrice, uint256 requestTime)
public
view
override
returns (FixedPoint.Unsigned memory)
{
require(!shouldRevert, "set to always reverts");
return oraclePrice.mul(priceTransformationScalar);
}
// Create a simple collateral requirement transformation that doubles the input collateralRequirement.
function transformCollateralRequirement(
FixedPoint.Unsigned memory price,
FixedPoint.Unsigned memory collateralRequirement
) public view override returns (FixedPoint.Unsigned memory) {
require(!shouldRevert, "set to always reverts");
return collateralRequirement.mul(collateralRequirementTransformationScalar);
}
// Create a simple transformPriceIdentifier function that returns the transformed price identifier.
function transformPriceIdentifier(bytes32 priceIdentifier, uint256 requestTime)
public
view
override
returns (bytes32)
{
require(!shouldRevert, "set to always reverts");
return transformedPriceIdentifier;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/Testable.sol";
import "../../common/implementation/FixedPoint.sol";
import "../common/financial-product-libraries/FinancialProductLibrary.sol";
contract ExpiringMultiPartyMock is Testable {
using FixedPoint for FixedPoint.Unsigned;
FinancialProductLibrary public financialProductLibrary;
uint256 public expirationTimestamp;
FixedPoint.Unsigned public collateralRequirement;
bytes32 public priceIdentifier;
constructor(
address _financialProductLibraryAddress,
uint256 _expirationTimestamp,
FixedPoint.Unsigned memory _collateralRequirement,
bytes32 _priceIdentifier,
address _timerAddress
) Testable(_timerAddress) {
expirationTimestamp = _expirationTimestamp;
collateralRequirement = _collateralRequirement;
financialProductLibrary = FinancialProductLibrary(_financialProductLibraryAddress);
priceIdentifier = _priceIdentifier;
}
function transformPrice(FixedPoint.Unsigned memory price, uint256 requestTime)
public
view
returns (FixedPoint.Unsigned memory)
{
if (address(financialProductLibrary) == address(0)) return price;
try financialProductLibrary.transformPrice(price, requestTime) returns (
FixedPoint.Unsigned memory transformedPrice
) {
return transformedPrice;
} catch {
return price;
}
}
function transformCollateralRequirement(FixedPoint.Unsigned memory price)
public
view
returns (FixedPoint.Unsigned memory)
{
if (address(financialProductLibrary) == address(0)) return collateralRequirement;
try financialProductLibrary.transformCollateralRequirement(price, collateralRequirement) returns (
FixedPoint.Unsigned memory transformedCollateralRequirement
) {
return transformedCollateralRequirement;
} catch {
return collateralRequirement;
}
}
function transformPriceIdentifier(uint256 requestTime) public view returns (bytes32) {
if (address(financialProductLibrary) == address(0)) return priceIdentifier;
try financialProductLibrary.transformPriceIdentifier(priceIdentifier, requestTime) returns (
bytes32 transformedIdentifier
) {
return transformedIdentifier;
} catch {
return priceIdentifier;
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/FixedPoint.sol";
import "../../common/implementation/Testable.sol";
import "../interfaces/OracleAncillaryInterface.sol";
import "../interfaces/VotingAncillaryInterface.sol";
// A mock oracle used for testing. Exports the voting & oracle interfaces and events that contain ancillary data.
abstract contract VotingAncillaryInterfaceTesting is OracleAncillaryInterface, VotingAncillaryInterface, Testable {
using FixedPoint for FixedPoint.Unsigned;
// Events, data structures and functions not exported in the base interfaces, used for testing.
event VoteCommitted(
address indexed voter,
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
bytes ancillaryData
);
event EncryptedVote(
address indexed voter,
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
bytes ancillaryData,
bytes encryptedVote
);
event VoteRevealed(
address indexed voter,
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
int256 price,
bytes ancillaryData,
uint256 numTokens
);
event RewardsRetrieved(
address indexed voter,
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
bytes ancillaryData,
uint256 numTokens
);
event PriceRequestAdded(uint256 indexed roundId, bytes32 indexed identifier, uint256 time);
event PriceResolved(
uint256 indexed roundId,
bytes32 indexed identifier,
uint256 time,
int256 price,
bytes ancillaryData
);
struct Round {
uint256 snapshotId; // Voting token snapshot ID for this round. 0 if no snapshot has been taken.
FixedPoint.Unsigned inflationRate; // Inflation rate set for this round.
FixedPoint.Unsigned gatPercentage; // Gat rate set for this round.
uint256 rewardsExpirationTime; // Time that rewards for this round can be claimed until.
}
// Represents the status a price request has.
enum RequestStatus {
NotRequested, // Was never requested.
Active, // Is being voted on in the current round.
Resolved, // Was resolved in a previous round.
Future // Is scheduled to be voted on in a future round.
}
// Only used as a return value in view methods -- never stored in the contract.
struct RequestState {
RequestStatus status;
uint256 lastVotingRound;
}
function rounds(uint256 roundId) public view virtual returns (Round memory);
function getPriceRequestStatuses(VotingAncillaryInterface.PendingRequestAncillary[] memory requests)
public
view
virtual
returns (RequestState[] memory);
function getPendingPriceRequestsArray() external view virtual returns (bytes32[] memory);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/MultiRole.sol";
import "../../common/implementation/Withdrawable.sol";
import "../interfaces/VotingAncillaryInterface.sol";
import "../interfaces/FinderInterface.sol";
import "./Constants.sol";
/**
* @title Proxy to allow voting from another address.
* @dev Allows a UMA token holder to designate another address to vote on their behalf.
* Each voter must deploy their own instance of this contract.
*/
contract DesignatedVoting is Withdrawable {
/****************************************
* INTERNAL VARIABLES AND STORAGE *
****************************************/
enum Roles {
Owner, // Can set the Voter role. Is also permanently permissioned as the minter role.
Voter // Can vote through this contract.
}
// Reference to the UMA Finder contract, allowing Voting upgrades to be performed
// without requiring any calls to this contract.
FinderInterface private finder;
/**
* @notice Construct the DesignatedVoting contract.
* @param finderAddress keeps track of all contracts within the system based on their interfaceName.
* @param ownerAddress address of the owner of the DesignatedVoting contract.
* @param voterAddress address to which the owner has delegated their voting power.
*/
constructor(
address finderAddress,
address ownerAddress,
address voterAddress
) {
_createExclusiveRole(uint256(Roles.Owner), uint256(Roles.Owner), ownerAddress);
_createExclusiveRole(uint256(Roles.Voter), uint256(Roles.Owner), voterAddress);
_setWithdrawRole(uint256(Roles.Owner));
finder = FinderInterface(finderAddress);
}
/****************************************
* VOTING AND REWARD FUNCTIONALITY *
****************************************/
/**
* @notice Forwards a commit to Voting.
* @param identifier uniquely identifies the feed for this vote. EG BTC/USD price pair.
* @param time specifies the unix timestamp of the price being voted on.
* @param hash the keccak256 hash of the price you want to vote for and a random integer salt value.
*/
function commitVote(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData,
bytes32 hash
) external onlyRoleHolder(uint256(Roles.Voter)) {
_getVotingAddress().commitVote(identifier, time, ancillaryData, hash);
}
/**
* @notice Forwards a batch commit to Voting.
* @param commits struct to encapsulate an `identifier`, `time`, `hash` and optional `encryptedVote`.
*/
function batchCommit(VotingAncillaryInterface.CommitmentAncillary[] calldata commits)
external
onlyRoleHolder(uint256(Roles.Voter))
{
_getVotingAddress().batchCommit(commits);
}
/**
* @notice Forwards a reveal to Voting.
* @param identifier voted on in the commit phase. EG BTC/USD price pair.
* @param time specifies the unix timestamp of the price being voted on.
* @param price used along with the `salt` to produce the `hash` during the commit phase.
* @param salt used along with the `price` to produce the `hash` during the commit phase.
*/
function revealVote(
bytes32 identifier,
uint256 time,
int256 price,
bytes memory ancillaryData,
int256 salt
) external onlyRoleHolder(uint256(Roles.Voter)) {
_getVotingAddress().revealVote(identifier, time, price, ancillaryData, salt);
}
/**
* @notice Forwards a batch reveal to Voting.
* @param reveals is an array of the Reveal struct which contains an identifier, time, price and salt.
*/
function batchReveal(VotingAncillaryInterface.RevealAncillary[] calldata reveals)
external
onlyRoleHolder(uint256(Roles.Voter))
{
_getVotingAddress().batchReveal(reveals);
}
/**
* @notice Forwards a reward retrieval to Voting.
* @dev Rewards are added to the tokens already held by this contract.
* @param roundId defines the round from which voting rewards will be retrieved from.
* @param toRetrieve an array of PendingRequests which rewards are retrieved from.
* @return amount of rewards that the user should receive.
*/
function retrieveRewards(uint256 roundId, VotingAncillaryInterface.PendingRequestAncillary[] memory toRetrieve)
public
onlyRoleHolder(uint256(Roles.Voter))
returns (FixedPoint.Unsigned memory)
{
return _getVotingAddress().retrieveRewards(address(this), roundId, toRetrieve);
}
function _getVotingAddress() private view returns (VotingAncillaryInterface) {
return VotingAncillaryInterface(finder.getImplementationAddress(OracleInterfaces.Oracle));
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/Withdrawable.sol";
import "./DesignatedVoting.sol";
/**
* @title Factory to deploy new instances of DesignatedVoting and look up previously deployed instances.
* @dev Allows off-chain infrastructure to look up a hot wallet's deployed DesignatedVoting contract.
*/
contract DesignatedVotingFactory is Withdrawable {
/****************************************
* INTERNAL VARIABLES AND STORAGE *
****************************************/
enum Roles {
Withdrawer // Can withdraw any ETH or ERC20 sent accidentally to this contract.
}
address private finder;
mapping(address => DesignatedVoting) public designatedVotingContracts;
/**
* @notice Construct the DesignatedVotingFactory contract.
* @param finderAddress keeps track of all contracts within the system based on their interfaceName.
*/
constructor(address finderAddress) {
finder = finderAddress;
_createWithdrawRole(uint256(Roles.Withdrawer), uint256(Roles.Withdrawer), msg.sender);
}
/**
* @notice Deploys a new `DesignatedVoting` contract.
* @param ownerAddress defines who will own the deployed instance of the designatedVoting contract.
* @return designatedVoting a new DesignatedVoting contract.
*/
function newDesignatedVoting(address ownerAddress) external returns (DesignatedVoting) {
DesignatedVoting designatedVoting = new DesignatedVoting(finder, ownerAddress, msg.sender);
designatedVotingContracts[msg.sender] = designatedVoting;
return designatedVoting;
}
/**
* @notice Associates a `DesignatedVoting` instance with `msg.sender`.
* @param designatedVotingAddress address to designate voting to.
* @dev This is generally only used if the owner of a `DesignatedVoting` contract changes their `voter`
* address and wants that reflected here.
*/
function setDesignatedVoting(address designatedVotingAddress) external {
designatedVotingContracts[msg.sender] = DesignatedVoting(designatedVotingAddress);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../implementation/Withdrawable.sol";
// WithdrawableTest is derived from the abstract contract Withdrawable for testing purposes.
contract WithdrawableTest is Withdrawable {
enum Roles { Governance, Withdraw }
// solhint-disable-next-line no-empty-blocks
constructor() {
_createExclusiveRole(uint256(Roles.Governance), uint256(Roles.Governance), msg.sender);
_createWithdrawRole(uint256(Roles.Withdraw), uint256(Roles.Governance), msg.sender);
}
function pay() external payable {
require(msg.value > 0);
}
function setInternalWithdrawRole(uint256 setRoleId) public {
_setWithdrawRole(setRoleId);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../../interfaces/VotingInterface.sol";
import "../VoteTiming.sol";
// Wraps the library VoteTiming for testing purposes.
contract VoteTimingTest {
using VoteTiming for VoteTiming.Data;
VoteTiming.Data public voteTiming;
constructor(uint256 phaseLength) {
wrapInit(phaseLength);
}
function wrapComputeCurrentRoundId(uint256 currentTime) external view returns (uint256) {
return voteTiming.computeCurrentRoundId(currentTime);
}
function wrapComputeCurrentPhase(uint256 currentTime) external view returns (VotingAncillaryInterface.Phase) {
return voteTiming.computeCurrentPhase(currentTime);
}
function wrapInit(uint256 phaseLength) public {
voteTiming.init(phaseLength);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
* Inspired by:
* - https://github.com/pie-dao/vested-token-migration-app
* - https://github.com/Uniswap/merkle-distributor
* - https://github.com/balancer-labs/erc20-redeemable
*
* @title MerkleDistributor contract.
* @notice Allows an owner to distribute any reward ERC20 to claimants according to Merkle roots. The owner can specify
* multiple Merkle roots distributions with customized reward currencies.
* @dev The Merkle trees are not validated in any way, so the system assumes the contract owner behaves honestly.
*/
contract MerkleDistributor is Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
// A Window maps a Merkle root to a reward token address.
struct Window {
// Merkle root describing the distribution.
bytes32 merkleRoot;
// Currency in which reward is processed.
IERC20 rewardToken;
// IPFS hash of the merkle tree. Can be used to independently fetch recipient proofs and tree. Note that the canonical
// data type for storing an IPFS hash is a multihash which is the concatenation of <varint hash function code>
// <varint digest size in bytes><hash function output>. We opted to store this in a string type to make it easier
// for users to query the ipfs data without needing to reconstruct the multihash. to view the IPFS data simply
// go to https://cloudflare-ipfs.com/ipfs/<IPFS-HASH>.
string ipfsHash;
}
// Represents an account's claim for `amount` within the Merkle root located at the `windowIndex`.
struct Claim {
uint256 windowIndex;
uint256 amount;
uint256 accountIndex; // Used only for bitmap. Assumed to be unique for each claim.
address account;
bytes32[] merkleProof;
}
// Windows are mapped to arbitrary indices.
mapping(uint256 => Window) public merkleWindows;
// Index of next created Merkle root.
uint256 public nextCreatedIndex;
// Track which accounts have claimed for each window index.
// Note: uses a packed array of bools for gas optimization on tracking certain claims. Copied from Uniswap's contract.
mapping(uint256 => mapping(uint256 => uint256)) private claimedBitMap;
/****************************************
* EVENTS
****************************************/
event Claimed(
address indexed caller,
uint256 windowIndex,
address indexed account,
uint256 accountIndex,
uint256 amount,
address indexed rewardToken
);
event CreatedWindow(
uint256 indexed windowIndex,
uint256 rewardsDeposited,
address indexed rewardToken,
address owner
);
event WithdrawRewards(address indexed owner, uint256 amount, address indexed currency);
event DeleteWindow(uint256 indexed windowIndex, address owner);
/****************************
* ADMIN FUNCTIONS
****************************/
/**
* @notice Set merkle root for the next available window index and seed allocations.
* @notice Callable only by owner of this contract. Caller must have approved this contract to transfer
* `rewardsToDeposit` amount of `rewardToken` or this call will fail. Importantly, we assume that the
* owner of this contract correctly chooses an amount `rewardsToDeposit` that is sufficient to cover all
* claims within the `merkleRoot`. Otherwise, a race condition can be created. This situation can occur
* because we do not segregate reward balances by window, for code simplicity purposes.
* (If `rewardsToDeposit` is purposefully insufficient to payout all claims, then the admin must
* subsequently transfer in rewards or the following situation can occur).
* Example race situation:
* - Window 1 Tree: Owner sets `rewardsToDeposit=100` and insert proofs that give claimant A 50 tokens and
* claimant B 51 tokens. The owner has made an error by not setting the `rewardsToDeposit` correctly to 101.
* - Window 2 Tree: Owner sets `rewardsToDeposit=1` and insert proofs that give claimant A 1 token. The owner
* correctly set `rewardsToDeposit` this time.
* - At this point contract owns 100 + 1 = 101 tokens. Now, imagine the following sequence:
* (1) Claimant A claims 50 tokens for Window 1, contract now has 101 - 50 = 51 tokens.
* (2) Claimant B claims 51 tokens for Window 1, contract now has 51 - 51 = 0 tokens.
* (3) Claimant A tries to claim 1 token for Window 2 but fails because contract has 0 tokens.
* - In summary, the contract owner created a race for step(2) and step(3) in which the first claim would
* succeed and the second claim would fail, even though both claimants would expect their claims to succeed.
* @param rewardsToDeposit amount of rewards to deposit to seed this allocation.
* @param rewardToken ERC20 reward token.
* @param merkleRoot merkle root describing allocation.
* @param ipfsHash hash of IPFS object, conveniently stored for clients
*/
function setWindow(
uint256 rewardsToDeposit,
address rewardToken,
bytes32 merkleRoot,
string memory ipfsHash
) external onlyOwner {
uint256 indexToSet = nextCreatedIndex;
nextCreatedIndex = indexToSet.add(1);
_setWindow(indexToSet, rewardsToDeposit, rewardToken, merkleRoot, ipfsHash);
}
/**
* @notice Delete merkle root at window index.
* @dev Callable only by owner. Likely to be followed by a withdrawRewards call to clear contract state.
* @param windowIndex merkle root index to delete.
*/
function deleteWindow(uint256 windowIndex) external onlyOwner {
delete merkleWindows[windowIndex];
emit DeleteWindow(windowIndex, msg.sender);
}
/**
* @notice Emergency method that transfers rewards out of the contract if the contract was configured improperly.
* @dev Callable only by owner.
* @param rewardCurrency rewards to withdraw from contract.
* @param amount amount of rewards to withdraw.
*/
function withdrawRewards(address rewardCurrency, uint256 amount) external onlyOwner {
IERC20(rewardCurrency).safeTransfer(msg.sender, amount);
emit WithdrawRewards(msg.sender, amount, rewardCurrency);
}
/****************************
* NON-ADMIN FUNCTIONS
****************************/
/**
* @notice Batch claims to reduce gas versus individual submitting all claims. Method will fail
* if any individual claims within the batch would fail.
* @dev Optimistically tries to batch together consecutive claims for the same account and same
* reward token to reduce gas. Therefore, the most gas-cost-optimal way to use this method
* is to pass in an array of claims sorted by account and reward currency.
* @param claims array of claims to claim.
*/
function claimMulti(Claim[] memory claims) external {
uint256 batchedAmount = 0;
uint256 claimCount = claims.length;
for (uint256 i = 0; i < claimCount; i++) {
Claim memory _claim = claims[i];
_verifyAndMarkClaimed(_claim);
batchedAmount = batchedAmount.add(_claim.amount);
// If the next claim is NOT the same account or the same token (or this claim is the last one),
// then disburse the `batchedAmount` to the current claim's account for the current claim's reward token.
uint256 nextI = i + 1;
address currentRewardToken = address(merkleWindows[_claim.windowIndex].rewardToken);
if (
nextI == claimCount ||
// This claim is last claim.
claims[nextI].account != _claim.account ||
// Next claim account is different than current one.
address(merkleWindows[claims[nextI].windowIndex].rewardToken) != currentRewardToken
// Next claim reward token is different than current one.
) {
IERC20(currentRewardToken).safeTransfer(_claim.account, batchedAmount);
batchedAmount = 0;
}
}
}
/**
* @notice Claim amount of reward tokens for account, as described by Claim input object.
* @dev If the `_claim`'s `amount`, `accountIndex`, and `account` do not exactly match the
* values stored in the merkle root for the `_claim`'s `windowIndex` this method
* will revert.
* @param _claim claim object describing amount, accountIndex, account, window index, and merkle proof.
*/
function claim(Claim memory _claim) public {
_verifyAndMarkClaimed(_claim);
merkleWindows[_claim.windowIndex].rewardToken.safeTransfer(_claim.account, _claim.amount);
}
/**
* @notice Returns True if the claim for `accountIndex` has already been completed for the Merkle root at
* `windowIndex`.
* @dev This method will only work as intended if all `accountIndex`'s are unique for a given `windowIndex`.
* The onus is on the Owner of this contract to submit only valid Merkle roots.
* @param windowIndex merkle root to check.
* @param accountIndex account index to check within window index.
* @return True if claim has been executed already, False otherwise.
*/
function isClaimed(uint256 windowIndex, uint256 accountIndex) public view returns (bool) {
uint256 claimedWordIndex = accountIndex / 256;
uint256 claimedBitIndex = accountIndex % 256;
uint256 claimedWord = claimedBitMap[windowIndex][claimedWordIndex];
uint256 mask = (1 << claimedBitIndex);
return claimedWord & mask == mask;
}
/**
* @notice Returns True if leaf described by {account, amount, accountIndex} is stored in Merkle root at given
* window index.
* @param _claim claim object describing amount, accountIndex, account, window index, and merkle proof.
* @return valid True if leaf exists.
*/
function verifyClaim(Claim memory _claim) public view returns (bool valid) {
bytes32 leaf = keccak256(abi.encodePacked(_claim.account, _claim.amount, _claim.accountIndex));
return MerkleProof.verify(_claim.merkleProof, merkleWindows[_claim.windowIndex].merkleRoot, leaf);
}
/****************************
* PRIVATE FUNCTIONS
****************************/
// Mark claim as completed for `accountIndex` for Merkle root at `windowIndex`.
function _setClaimed(uint256 windowIndex, uint256 accountIndex) private {
uint256 claimedWordIndex = accountIndex / 256;
uint256 claimedBitIndex = accountIndex % 256;
claimedBitMap[windowIndex][claimedWordIndex] =
claimedBitMap[windowIndex][claimedWordIndex] |
(1 << claimedBitIndex);
}
// Store new Merkle root at `windowindex`. Pull `rewardsDeposited` from caller to seed distribution for this root.
function _setWindow(
uint256 windowIndex,
uint256 rewardsDeposited,
address rewardToken,
bytes32 merkleRoot,
string memory ipfsHash
) private {
Window storage window = merkleWindows[windowIndex];
window.merkleRoot = merkleRoot;
window.rewardToken = IERC20(rewardToken);
window.ipfsHash = ipfsHash;
emit CreatedWindow(windowIndex, rewardsDeposited, rewardToken, msg.sender);
window.rewardToken.safeTransferFrom(msg.sender, address(this), rewardsDeposited);
}
// Verify claim is valid and mark it as completed in this contract.
function _verifyAndMarkClaimed(Claim memory _claim) private {
// Check claimed proof against merkle window at given index.
require(verifyClaim(_claim), "Incorrect merkle proof");
// Check the account has not yet claimed for this window.
require(!isClaimed(_claim.windowIndex, _claim.accountIndex), "Account has already claimed for this window");
// Proof is correct and claim has not occurred yet, mark claimed complete.
_setClaimed(_claim.windowIndex, _claim.accountIndex);
emit Claimed(
msg.sender,
_claim.windowIndex,
_claim.account,
_claim.accountIndex,
_claim.amount,
address(merkleWindows[_claim.windowIndex].rewardToken)
);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
// Check if the computed hash (root) is equal to the provided root
return computedHash == root;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../interfaces/IdentifierWhitelistInterface.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
/**
* @title Stores a whitelist of supported identifiers that the oracle can provide prices for.
*/
contract IdentifierWhitelist is IdentifierWhitelistInterface, Ownable {
/****************************************
* INTERNAL VARIABLES AND STORAGE *
****************************************/
mapping(bytes32 => bool) private supportedIdentifiers;
/****************************************
* EVENTS *
****************************************/
event SupportedIdentifierAdded(bytes32 indexed identifier);
event SupportedIdentifierRemoved(bytes32 indexed identifier);
/****************************************
* ADMIN STATE MODIFYING FUNCTIONS *
****************************************/
/**
* @notice Adds the provided identifier as a supported identifier.
* @dev Price requests using this identifier will succeed after this call.
* @param identifier unique UTF-8 representation for the feed being added. Eg: BTC/USD.
*/
function addSupportedIdentifier(bytes32 identifier) external override onlyOwner {
if (!supportedIdentifiers[identifier]) {
supportedIdentifiers[identifier] = true;
emit SupportedIdentifierAdded(identifier);
}
}
/**
* @notice Removes the identifier from the whitelist.
* @dev Price requests using this identifier will no longer succeed after this call.
* @param identifier unique UTF-8 representation for the feed being removed. Eg: BTC/USD.
*/
function removeSupportedIdentifier(bytes32 identifier) external override onlyOwner {
if (supportedIdentifiers[identifier]) {
supportedIdentifiers[identifier] = false;
emit SupportedIdentifierRemoved(identifier);
}
}
/****************************************
* WHITELIST GETTERS FUNCTIONS *
****************************************/
/**
* @notice Checks whether an identifier is on the whitelist.
* @param identifier unique UTF-8 representation for the feed being queried. Eg: BTC/USD.
* @return bool if the identifier is supported (or not).
*/
function isIdentifierSupported(bytes32 identifier) external view override returns (bool) {
return supportedIdentifiers[identifier];
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../interfaces/AdministrateeInterface.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
/**
* @title Admin for financial contracts in the UMA system.
* @dev Allows appropriately permissioned admin roles to interact with financial contracts.
*/
contract FinancialContractsAdmin is Ownable {
/**
* @notice Calls emergency shutdown on the provided financial contract.
* @param financialContract address of the FinancialContract to be shut down.
*/
function callEmergencyShutdown(address financialContract) external onlyOwner {
AdministrateeInterface administratee = AdministrateeInterface(financialContract);
administratee.emergencyShutdown();
}
/**
* @notice Calls remargin on the provided financial contract.
* @param financialContract address of the FinancialContract to be remargined.
*/
function callRemargin(address financialContract) external onlyOwner {
AdministrateeInterface administratee = AdministrateeInterface(financialContract);
administratee.remargin();
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../interfaces/AdministrateeInterface.sol";
// A mock implementation of AdministrateeInterface, taking the place of a financial contract.
contract MockAdministratee is AdministrateeInterface {
uint256 public timesRemargined;
uint256 public timesEmergencyShutdown;
function remargin() external override {
timesRemargined++;
}
function emergencyShutdown() external override {
timesEmergencyShutdown++;
}
function pfc() external view override returns (FixedPoint.Unsigned memory) {
return FixedPoint.fromUnscaledUint(0);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./ConfigStoreInterface.sol";
import "../../common/implementation/Testable.sol";
import "../../common/implementation/Lockable.sol";
import "../../common/implementation/FixedPoint.sol";
/**
* @notice ConfigStore stores configuration settings for a perpetual contract and provides an interface for it
* to query settings such as reward rates, proposal bond sizes, etc. The configuration settings can be upgraded
* by a privileged account and the upgraded changes are timelocked.
*/
contract ConfigStore is ConfigStoreInterface, Testable, Lockable, Ownable {
using SafeMath for uint256;
using FixedPoint for FixedPoint.Unsigned;
/****************************************
* STORE DATA STRUCTURES *
****************************************/
// Make currentConfig private to force user to call getCurrentConfig, which returns the pendingConfig
// if its liveness has expired.
ConfigStoreInterface.ConfigSettings private currentConfig;
// Beginning on `pendingPassedTimestamp`, the `pendingConfig` can be published as the current config.
ConfigStoreInterface.ConfigSettings public pendingConfig;
uint256 public pendingPassedTimestamp;
/****************************************
* EVENTS *
****************************************/
event ProposedNewConfigSettings(
address indexed proposer,
uint256 rewardRatePerSecond,
uint256 proposerBondPercentage,
uint256 timelockLiveness,
int256 maxFundingRate,
int256 minFundingRate,
uint256 proposalTimePastLimit,
uint256 proposalPassedTimestamp
);
event ChangedConfigSettings(
uint256 rewardRatePerSecond,
uint256 proposerBondPercentage,
uint256 timelockLiveness,
int256 maxFundingRate,
int256 minFundingRate,
uint256 proposalTimePastLimit
);
/****************************************
* MODIFIERS *
****************************************/
// Update config settings if possible.
modifier updateConfig() {
_updateConfig();
_;
}
/**
* @notice Construct the Config Store. An initial configuration is provided and set on construction.
* @param _initialConfig Configuration settings to initialize `currentConfig` with.
* @param _timerAddress Address of testable Timer contract.
*/
constructor(ConfigSettings memory _initialConfig, address _timerAddress) Testable(_timerAddress) {
_validateConfig(_initialConfig);
currentConfig = _initialConfig;
}
/**
* @notice Returns current config or pending config if pending liveness has expired.
* @return ConfigSettings config settings that calling financial contract should view as "live".
*/
function updateAndGetCurrentConfig()
external
override
updateConfig()
nonReentrant()
returns (ConfigStoreInterface.ConfigSettings memory)
{
return currentConfig;
}
/**
* @notice Propose new configuration settings. New settings go into effect after a liveness period passes.
* @param newConfig Configuration settings to publish after `currentConfig.timelockLiveness` passes from block.timestamp.
* @dev Callable only by owner. Calling this while there is already a pending proposal will overwrite the pending proposal.
*/
function proposeNewConfig(ConfigSettings memory newConfig) external onlyOwner() nonReentrant() updateConfig() {
_validateConfig(newConfig);
// Warning: This overwrites a pending proposal!
pendingConfig = newConfig;
// Use current config's liveness period to timelock this proposal.
pendingPassedTimestamp = getCurrentTime().add(currentConfig.timelockLiveness);
emit ProposedNewConfigSettings(
msg.sender,
newConfig.rewardRatePerSecond.rawValue,
newConfig.proposerBondPercentage.rawValue,
newConfig.timelockLiveness,
newConfig.maxFundingRate.rawValue,
newConfig.minFundingRate.rawValue,
newConfig.proposalTimePastLimit,
pendingPassedTimestamp
);
}
/**
* @notice Publish any pending configuration settings if there is a pending proposal that has passed liveness.
*/
function publishPendingConfig() external nonReentrant() updateConfig() {}
/****************************************
* INTERNAL FUNCTIONS *
****************************************/
// Check if pending proposal can overwrite the current config.
function _updateConfig() internal {
// If liveness has passed, publish proposed configuration settings.
if (_pendingProposalPassed()) {
currentConfig = pendingConfig;
_deletePendingConfig();
emit ChangedConfigSettings(
currentConfig.rewardRatePerSecond.rawValue,
currentConfig.proposerBondPercentage.rawValue,
currentConfig.timelockLiveness,
currentConfig.maxFundingRate.rawValue,
currentConfig.minFundingRate.rawValue,
currentConfig.proposalTimePastLimit
);
}
}
function _deletePendingConfig() internal {
delete pendingConfig;
pendingPassedTimestamp = 0;
}
function _pendingProposalPassed() internal view returns (bool) {
return (pendingPassedTimestamp != 0 && pendingPassedTimestamp <= getCurrentTime());
}
// Use this method to constrain values with which you can set ConfigSettings.
function _validateConfig(ConfigStoreInterface.ConfigSettings memory config) internal pure {
// We don't set limits on proposal timestamps because there are already natural limits:
// - Future: price requests to the OptimisticOracle must be in the past---we can't add further constraints.
// - Past: proposal times must always be after the last update time, and a reasonable past limit would be 30
// mins, meaning that no proposal timestamp can be more than 30 minutes behind the current time.
// Make sure timelockLiveness is not too long, otherwise contract might not be able to fix itself
// before a vulnerability drains its collateral.
require(config.timelockLiveness <= 7 days && config.timelockLiveness >= 1 days, "Invalid timelockLiveness");
// The reward rate should be modified as needed to incentivize honest proposers appropriately.
// Additionally, the rate should be less than 100% a year => 100% / 360 days / 24 hours / 60 mins / 60 secs
// = 0.0000033
FixedPoint.Unsigned memory maxRewardRatePerSecond = FixedPoint.fromUnscaledUint(33).div(1e7);
require(config.rewardRatePerSecond.isLessThan(maxRewardRatePerSecond), "Invalid rewardRatePerSecond");
// We don't set a limit on the proposer bond because it is a defense against dishonest proposers. If a proposer
// were to successfully propose a very high or low funding rate, then their PfC would be very high. The proposer
// could theoretically keep their "evil" funding rate alive indefinitely by continuously disputing honest
// proposers, so we would want to be able to set the proposal bond (equal to the dispute bond) higher than their
// PfC for each proposal liveness window. The downside of not limiting this is that the config store owner
// can set it arbitrarily high and preclude a new funding rate from ever coming in. We suggest setting the
// proposal bond based on the configuration's funding rate range like in this discussion:
// https://github.com/UMAprotocol/protocol/issues/2039#issuecomment-719734383
// We also don't set a limit on the funding rate max/min because we might need to allow very high magnitude
// funding rates in extraordinarily volatile market situations. Note, that even though we do not bound
// the max/min, we still recommend that the deployer of this contract set the funding rate max/min values
// to bound the PfC of a dishonest proposer. A reasonable range might be the equivalent of [+200%/year, -200%/year].
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/FixedPoint.sol";
interface ConfigStoreInterface {
// All of the configuration settings available for querying by a perpetual.
struct ConfigSettings {
// Liveness period (in seconds) for an update to currentConfig to become official.
uint256 timelockLiveness;
// Reward rate paid to successful proposers. Percentage of 1 E.g., .1 is 10%.
FixedPoint.Unsigned rewardRatePerSecond;
// Bond % (of given contract's PfC) that must be staked by proposers. Percentage of 1, e.g. 0.0005 is 0.05%.
FixedPoint.Unsigned proposerBondPercentage;
// Maximum funding rate % per second that can be proposed.
FixedPoint.Signed maxFundingRate;
// Minimum funding rate % per second that can be proposed.
FixedPoint.Signed minFundingRate;
// Funding rate proposal timestamp cannot be more than this amount of seconds in the past from the latest
// update time.
uint256 proposalTimePastLimit;
}
function updateAndGetCurrentConfig() external returns (ConfigSettings memory);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/interfaces/ExpandedIERC20.sol";
import "../../common/interfaces/IERC20Standard.sol";
import "../../oracle/implementation/ContractCreator.sol";
import "../../common/implementation/Testable.sol";
import "../../common/implementation/AddressWhitelist.sol";
import "../../common/implementation/Lockable.sol";
import "../common/TokenFactory.sol";
import "../common/SyntheticToken.sol";
import "./PerpetualLib.sol";
import "./ConfigStore.sol";
/**
* @title Perpetual Contract creator.
* @notice Factory contract to create and register new instances of perpetual contracts.
* Responsible for constraining the parameters used to construct a new perpetual. This creator contains a number of constraints
* that are applied to newly created contract. These constraints can evolve over time and are
* initially constrained to conservative values in this first iteration. Technically there is nothing in the
* Perpetual contract requiring these constraints. However, because `createPerpetual()` is intended
* to be the only way to create valid financial contracts that are registered with the DVM (via _registerContract),
we can enforce deployment configurations here.
*/
contract PerpetualCreator is ContractCreator, Testable, Lockable {
using FixedPoint for FixedPoint.Unsigned;
/****************************************
* PERP CREATOR DATA STRUCTURES *
****************************************/
// Immutable params for perpetual contract.
struct Params {
address collateralAddress;
bytes32 priceFeedIdentifier;
bytes32 fundingRateIdentifier;
string syntheticName;
string syntheticSymbol;
FixedPoint.Unsigned collateralRequirement;
FixedPoint.Unsigned disputeBondPercentage;
FixedPoint.Unsigned sponsorDisputeRewardPercentage;
FixedPoint.Unsigned disputerDisputeRewardPercentage;
FixedPoint.Unsigned minSponsorTokens;
FixedPoint.Unsigned tokenScaling;
uint256 withdrawalLiveness;
uint256 liquidationLiveness;
}
// Address of TokenFactory used to create a new synthetic token.
address public tokenFactoryAddress;
event CreatedPerpetual(address indexed perpetualAddress, address indexed deployerAddress);
event CreatedConfigStore(address indexed configStoreAddress, address indexed ownerAddress);
/**
* @notice Constructs the Perpetual contract.
* @param _finderAddress UMA protocol Finder used to discover other protocol contracts.
* @param _tokenFactoryAddress ERC20 token factory used to deploy synthetic token instances.
* @param _timerAddress Contract that stores the current time in a testing environment.
*/
constructor(
address _finderAddress,
address _tokenFactoryAddress,
address _timerAddress
) ContractCreator(_finderAddress) Testable(_timerAddress) nonReentrant() {
tokenFactoryAddress = _tokenFactoryAddress;
}
/**
* @notice Creates an instance of perpetual and registers it within the registry.
* @param params is a `ConstructorParams` object from Perpetual.
* @return address of the deployed contract.
*/
function createPerpetual(Params memory params, ConfigStore.ConfigSettings memory configSettings)
public
nonReentrant()
returns (address)
{
require(bytes(params.syntheticName).length != 0, "Missing synthetic name");
require(bytes(params.syntheticSymbol).length != 0, "Missing synthetic symbol");
// Create new config settings store for this contract and reset ownership to the deployer.
ConfigStore configStore = new ConfigStore(configSettings, timerAddress);
configStore.transferOwnership(msg.sender);
emit CreatedConfigStore(address(configStore), configStore.owner());
// Create a new synthetic token using the params.
TokenFactory tf = TokenFactory(tokenFactoryAddress);
// If the collateral token does not have a `decimals()` method,
// then a default precision of 18 will be applied to the newly created synthetic token.
uint8 syntheticDecimals = _getSyntheticDecimals(params.collateralAddress);
ExpandedIERC20 tokenCurrency = tf.createToken(params.syntheticName, params.syntheticSymbol, syntheticDecimals);
address derivative = PerpetualLib.deploy(_convertParams(params, tokenCurrency, address(configStore)));
// Give permissions to new derivative contract and then hand over ownership.
tokenCurrency.addMinter(derivative);
tokenCurrency.addBurner(derivative);
tokenCurrency.resetOwner(derivative);
_registerContract(new address[](0), derivative);
emit CreatedPerpetual(derivative, msg.sender);
return derivative;
}
/****************************************
* PRIVATE FUNCTIONS *
****************************************/
// Converts createPerpetual params to Perpetual constructor params.
function _convertParams(
Params memory params,
ExpandedIERC20 newTokenCurrency,
address configStore
) private view returns (Perpetual.ConstructorParams memory constructorParams) {
// Known from creator deployment.
constructorParams.finderAddress = finderAddress;
constructorParams.timerAddress = timerAddress;
// Enforce configuration constraints.
require(params.withdrawalLiveness != 0, "Withdrawal liveness cannot be 0");
require(params.liquidationLiveness != 0, "Liquidation liveness cannot be 0");
_requireWhitelistedCollateral(params.collateralAddress);
// We don't want perpetual deployers to be able to intentionally or unintentionally set
// liveness periods that could induce arithmetic overflow, but we also don't want
// to be opinionated about what livenesses are "correct", so we will somewhat
// arbitrarily set the liveness upper bound to 100 years (5200 weeks). In practice, liveness
// periods even greater than a few days would make the perpetual unusable for most users.
require(params.withdrawalLiveness < 5200 weeks, "Withdrawal liveness too large");
require(params.liquidationLiveness < 5200 weeks, "Liquidation liveness too large");
// To avoid precision loss or overflows, prevent the token scaling from being too large or too small.
FixedPoint.Unsigned memory minScaling = FixedPoint.Unsigned(1e8); // 1e-10
FixedPoint.Unsigned memory maxScaling = FixedPoint.Unsigned(1e28); // 1e10
require(
params.tokenScaling.isGreaterThan(minScaling) && params.tokenScaling.isLessThan(maxScaling),
"Invalid tokenScaling"
);
// Input from function call.
constructorParams.configStoreAddress = configStore;
constructorParams.tokenAddress = address(newTokenCurrency);
constructorParams.collateralAddress = params.collateralAddress;
constructorParams.priceFeedIdentifier = params.priceFeedIdentifier;
constructorParams.fundingRateIdentifier = params.fundingRateIdentifier;
constructorParams.collateralRequirement = params.collateralRequirement;
constructorParams.disputeBondPercentage = params.disputeBondPercentage;
constructorParams.sponsorDisputeRewardPercentage = params.sponsorDisputeRewardPercentage;
constructorParams.disputerDisputeRewardPercentage = params.disputerDisputeRewardPercentage;
constructorParams.minSponsorTokens = params.minSponsorTokens;
constructorParams.withdrawalLiveness = params.withdrawalLiveness;
constructorParams.liquidationLiveness = params.liquidationLiveness;
constructorParams.tokenScaling = params.tokenScaling;
}
// IERC20Standard.decimals() will revert if the collateral contract has not implemented the decimals() method,
// which is possible since the method is only an OPTIONAL method in the ERC20 standard:
// https://eips.ethereum.org/EIPS/eip-20#methods.
function _getSyntheticDecimals(address _collateralAddress) public view returns (uint8 decimals) {
try IERC20Standard(_collateralAddress).decimals() returns (uint8 _decimals) {
return _decimals;
} catch {
return 18;
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../interfaces/FinderInterface.sol";
import "../../common/implementation/AddressWhitelist.sol";
import "./Registry.sol";
import "./Constants.sol";
/**
* @title Base contract for all financial contract creators
*/
abstract contract ContractCreator {
address internal finderAddress;
constructor(address _finderAddress) {
finderAddress = _finderAddress;
}
function _requireWhitelistedCollateral(address collateralAddress) internal view {
FinderInterface finder = FinderInterface(finderAddress);
AddressWhitelist collateralWhitelist =
AddressWhitelist(finder.getImplementationAddress(OracleInterfaces.CollateralWhitelist));
require(collateralWhitelist.isOnWhitelist(collateralAddress), "Collateral not whitelisted");
}
function _registerContract(address[] memory parties, address contractToRegister) internal {
FinderInterface finder = FinderInterface(finderAddress);
Registry registry = Registry(finder.getImplementationAddress(OracleInterfaces.Registry));
registry.registerContract(parties, contractToRegister);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "./SyntheticToken.sol";
import "../../common/interfaces/ExpandedIERC20.sol";
import "../../common/implementation/Lockable.sol";
/**
* @title Factory for creating new mintable and burnable tokens.
*/
contract TokenFactory is Lockable {
/**
* @notice Create a new token and return it to the caller.
* @dev The caller will become the only minter and burner and the new owner capable of assigning the roles.
* @param tokenName used to describe the new token.
* @param tokenSymbol short ticker abbreviation of the name. Ideally < 5 chars.
* @param tokenDecimals used to define the precision used in the token's numerical representation.
* @return newToken an instance of the newly created token interface.
*/
function createToken(
string calldata tokenName,
string calldata tokenSymbol,
uint8 tokenDecimals
) external nonReentrant() returns (ExpandedIERC20 newToken) {
SyntheticToken mintableToken = new SyntheticToken(tokenName, tokenSymbol, tokenDecimals);
mintableToken.addMinter(msg.sender);
mintableToken.addBurner(msg.sender);
mintableToken.resetOwner(msg.sender);
newToken = ExpandedIERC20(address(mintableToken));
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../../common/implementation/ExpandedERC20.sol";
import "../../common/implementation/Lockable.sol";
/**
* @title Burnable and mintable ERC20.
* @dev The contract deployer will initially be the only minter, burner and owner capable of adding new roles.
*/
contract SyntheticToken is ExpandedERC20, Lockable {
/**
* @notice Constructs the SyntheticToken.
* @param tokenName The name which describes the new token.
* @param tokenSymbol The ticker abbreviation of the name. Ideally < 5 chars.
* @param tokenDecimals The number of decimals to define token precision.
*/
constructor(
string memory tokenName,
string memory tokenSymbol,
uint8 tokenDecimals
) ExpandedERC20(tokenName, tokenSymbol, tokenDecimals) nonReentrant() {}
/**
* @notice Add Minter role to account.
* @dev The caller must have the Owner role.
* @param account The address to which the Minter role is added.
*/
function addMinter(address account) external override nonReentrant() {
addMember(uint256(Roles.Minter), account);
}
/**
* @notice Remove Minter role from account.
* @dev The caller must have the Owner role.
* @param account The address from which the Minter role is removed.
*/
function removeMinter(address account) external nonReentrant() {
removeMember(uint256(Roles.Minter), account);
}
/**
* @notice Add Burner role to account.
* @dev The caller must have the Owner role.
* @param account The address to which the Burner role is added.
*/
function addBurner(address account) external override nonReentrant() {
addMember(uint256(Roles.Burner), account);
}
/**
* @notice Removes Burner role from account.
* @dev The caller must have the Owner role.
* @param account The address from which the Burner role is removed.
*/
function removeBurner(address account) external nonReentrant() {
removeMember(uint256(Roles.Burner), account);
}
/**
* @notice Reset Owner role to account.
* @dev The caller must have the Owner role.
* @param account The new holder of the Owner role.
*/
function resetOwner(address account) external override nonReentrant() {
resetMember(uint256(Roles.Owner), account);
}
/**
* @notice Checks if a given account holds the Minter role.
* @param account The address which is checked for the Minter role.
* @return bool True if the provided account is a Minter.
*/
function isMinter(address account) public view nonReentrantView() returns (bool) {
return holdsRole(uint256(Roles.Minter), account);
}
/**
* @notice Checks if a given account holds the Burner role.
* @param account The address which is checked for the Burner role.
* @return bool True if the provided account is a Burner.
*/
function isBurner(address account) public view nonReentrantView() returns (bool) {
return holdsRole(uint256(Roles.Burner), account);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "./Perpetual.sol";
/**
* @title Provides convenient Perpetual Multi Party contract utilities.
* @dev Using this library to deploy Perpetuals allows calling contracts to avoid importing the full bytecode.
*/
library PerpetualLib {
/**
* @notice Returns address of new Perpetual deployed with given `params` configuration.
* @dev Caller will need to register new Perpetual with the Registry to begin requesting prices. Caller is also
* responsible for enforcing constraints on `params`.
* @param params is a `ConstructorParams` object from Perpetual.
* @return address of the deployed Perpetual contract
*/
function deploy(Perpetual.ConstructorParams memory params) public returns (address) {
Perpetual derivative = new Perpetual(params);
return address(derivative);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "./PerpetualLiquidatable.sol";
/**
* @title Perpetual Multiparty Contract.
* @notice Convenient wrapper for Liquidatable.
*/
contract Perpetual is PerpetualLiquidatable {
/**
* @notice Constructs the Perpetual contract.
* @param params struct to define input parameters for construction of Liquidatable. Some params
* are fed directly into the PositionManager's constructor within the inheritance tree.
*/
constructor(ConstructorParams memory params)
PerpetualLiquidatable(params)
// Note: since there is no logic here, there is no need to add a re-entrancy guard.
{
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "./PerpetualPositionManager.sol";
import "../../common/implementation/FixedPoint.sol";
/**
* @title PerpetualLiquidatable
* @notice Adds logic to a position-managing contract that enables callers to liquidate an undercollateralized position.
* @dev The liquidation has a liveness period before expiring successfully, during which someone can "dispute" the
* liquidation, which sends a price request to the relevant Oracle to settle the final collateralization ratio based on
* a DVM price. The contract enforces dispute rewards in order to incentivize disputers to correctly dispute false
* liquidations and compensate position sponsors who had their position incorrectly liquidated. Importantly, a
* prospective disputer must deposit a dispute bond that they can lose in the case of an unsuccessful dispute.
* NOTE: this contract does _not_ work with ERC777 collateral currencies or any others that call into the receiver on
* transfer(). Using an ERC777 token would allow a user to maliciously grief other participants (while also losing
* money themselves).
*/
contract PerpetualLiquidatable is PerpetualPositionManager {
using FixedPoint for FixedPoint.Unsigned;
using SafeMath for uint256;
using SafeERC20 for IERC20;
using SafeERC20 for ExpandedIERC20;
/****************************************
* LIQUIDATION DATA STRUCTURES *
****************************************/
// Because of the check in withdrawable(), the order of these enum values should not change.
enum Status { Uninitialized, NotDisputed, Disputed, DisputeSucceeded, DisputeFailed }
struct LiquidationData {
// Following variables set upon creation of liquidation:
address sponsor; // Address of the liquidated position's sponsor
address liquidator; // Address who created this liquidation
Status state; // Liquidated (and expired or not), Pending a Dispute, or Dispute has resolved
uint256 liquidationTime; // Time when liquidation is initiated, needed to get price from Oracle
// Following variables determined by the position that is being liquidated:
FixedPoint.Unsigned tokensOutstanding; // Synthetic tokens required to be burned by liquidator to initiate dispute
FixedPoint.Unsigned lockedCollateral; // Collateral locked by contract and released upon expiry or post-dispute
// Amount of collateral being liquidated, which could be different from
// lockedCollateral if there were pending withdrawals at the time of liquidation
FixedPoint.Unsigned liquidatedCollateral;
// Unit value (starts at 1) that is used to track the fees per unit of collateral over the course of the liquidation.
FixedPoint.Unsigned rawUnitCollateral;
// Following variable set upon initiation of a dispute:
address disputer; // Person who is disputing a liquidation
// Following variable set upon a resolution of a dispute:
FixedPoint.Unsigned settlementPrice; // Final price as determined by an Oracle following a dispute
FixedPoint.Unsigned finalFee;
}
// Define the contract's constructor parameters as a struct to enable more variables to be specified.
// This is required to enable more params, over and above Solidity's limits.
struct ConstructorParams {
// Params for PerpetualPositionManager only.
uint256 withdrawalLiveness;
address configStoreAddress;
address collateralAddress;
address tokenAddress;
address finderAddress;
address timerAddress;
bytes32 priceFeedIdentifier;
bytes32 fundingRateIdentifier;
FixedPoint.Unsigned minSponsorTokens;
FixedPoint.Unsigned tokenScaling;
// Params specifically for PerpetualLiquidatable.
uint256 liquidationLiveness;
FixedPoint.Unsigned collateralRequirement;
FixedPoint.Unsigned disputeBondPercentage;
FixedPoint.Unsigned sponsorDisputeRewardPercentage;
FixedPoint.Unsigned disputerDisputeRewardPercentage;
}
// This struct is used in the `withdrawLiquidation` method that disperses liquidation and dispute rewards.
// `payToX` stores the total collateral to withdraw from the contract to pay X. This value might differ
// from `paidToX` due to precision loss between accounting for the `rawCollateral` versus the
// fee-adjusted collateral. These variables are stored within a struct to avoid the stack too deep error.
struct RewardsData {
FixedPoint.Unsigned payToSponsor;
FixedPoint.Unsigned payToLiquidator;
FixedPoint.Unsigned payToDisputer;
FixedPoint.Unsigned paidToSponsor;
FixedPoint.Unsigned paidToLiquidator;
FixedPoint.Unsigned paidToDisputer;
}
// Liquidations are unique by ID per sponsor
mapping(address => LiquidationData[]) public liquidations;
// Total collateral in liquidation.
FixedPoint.Unsigned public rawLiquidationCollateral;
// Immutable contract parameters:
// Amount of time for pending liquidation before expiry.
// !!Note: The lower the liquidation liveness value, the more risk incurred by sponsors.
// Extremely low liveness values increase the chance that opportunistic invalid liquidations
// expire without dispute, thereby decreasing the usability for sponsors and increasing the risk
// for the contract as a whole. An insolvent contract is extremely risky for any sponsor or synthetic
// token holder for the contract.
uint256 public liquidationLiveness;
// Required collateral:TRV ratio for a position to be considered sufficiently collateralized.
FixedPoint.Unsigned public collateralRequirement;
// Percent of a Liquidation/Position's lockedCollateral to be deposited by a potential disputer
// Represented as a multiplier, for example 1.5e18 = "150%" and 0.05e18 = "5%"
FixedPoint.Unsigned public disputeBondPercentage;
// Percent of oraclePrice paid to sponsor in the Disputed state (i.e. following a successful dispute)
// Represented as a multiplier, see above.
FixedPoint.Unsigned public sponsorDisputeRewardPercentage;
// Percent of oraclePrice paid to disputer in the Disputed state (i.e. following a successful dispute)
// Represented as a multiplier, see above.
FixedPoint.Unsigned public disputerDisputeRewardPercentage;
/****************************************
* EVENTS *
****************************************/
event LiquidationCreated(
address indexed sponsor,
address indexed liquidator,
uint256 indexed liquidationId,
uint256 tokensOutstanding,
uint256 lockedCollateral,
uint256 liquidatedCollateral,
uint256 liquidationTime
);
event LiquidationDisputed(
address indexed sponsor,
address indexed liquidator,
address indexed disputer,
uint256 liquidationId,
uint256 disputeBondAmount
);
event DisputeSettled(
address indexed caller,
address indexed sponsor,
address indexed liquidator,
address disputer,
uint256 liquidationId,
bool disputeSucceeded
);
event LiquidationWithdrawn(
address indexed caller,
uint256 paidToLiquidator,
uint256 paidToDisputer,
uint256 paidToSponsor,
Status indexed liquidationStatus,
uint256 settlementPrice
);
/****************************************
* MODIFIERS *
****************************************/
modifier disputable(uint256 liquidationId, address sponsor) {
_disputable(liquidationId, sponsor);
_;
}
modifier withdrawable(uint256 liquidationId, address sponsor) {
_withdrawable(liquidationId, sponsor);
_;
}
/**
* @notice Constructs the liquidatable contract.
* @param params struct to define input parameters for construction of Liquidatable. Some params
* are fed directly into the PositionManager's constructor within the inheritance tree.
*/
constructor(ConstructorParams memory params)
PerpetualPositionManager(
params.withdrawalLiveness,
params.collateralAddress,
params.tokenAddress,
params.finderAddress,
params.priceFeedIdentifier,
params.fundingRateIdentifier,
params.minSponsorTokens,
params.configStoreAddress,
params.tokenScaling,
params.timerAddress
)
{
require(params.collateralRequirement.isGreaterThan(1));
require(params.sponsorDisputeRewardPercentage.add(params.disputerDisputeRewardPercentage).isLessThan(1));
// Set liquidatable specific variables.
liquidationLiveness = params.liquidationLiveness;
collateralRequirement = params.collateralRequirement;
disputeBondPercentage = params.disputeBondPercentage;
sponsorDisputeRewardPercentage = params.sponsorDisputeRewardPercentage;
disputerDisputeRewardPercentage = params.disputerDisputeRewardPercentage;
}
/****************************************
* LIQUIDATION FUNCTIONS *
****************************************/
/**
* @notice Liquidates the sponsor's position if the caller has enough
* synthetic tokens to retire the position's outstanding tokens. Liquidations above
* a minimum size also reset an ongoing "slow withdrawal"'s liveness.
* @dev This method generates an ID that will uniquely identify liquidation for the sponsor. This contract must be
* approved to spend at least `tokensLiquidated` of `tokenCurrency` and at least `finalFeeBond` of `collateralCurrency`.
* @dev This contract must have the Burner role for the `tokenCurrency`.
* @param sponsor address of the sponsor to liquidate.
* @param minCollateralPerToken abort the liquidation if the position's collateral per token is below this value.
* @param maxCollateralPerToken abort the liquidation if the position's collateral per token exceeds this value.
* @param maxTokensToLiquidate max number of tokens to liquidate.
* @param deadline abort the liquidation if the transaction is mined after this timestamp.
* @return liquidationId ID of the newly created liquidation.
* @return tokensLiquidated amount of synthetic tokens removed and liquidated from the `sponsor`'s position.
* @return finalFeeBond amount of collateral to be posted by liquidator and returned if not disputed successfully.
*/
function createLiquidation(
address sponsor,
FixedPoint.Unsigned calldata minCollateralPerToken,
FixedPoint.Unsigned calldata maxCollateralPerToken,
FixedPoint.Unsigned calldata maxTokensToLiquidate,
uint256 deadline
)
external
notEmergencyShutdown()
fees()
nonReentrant()
returns (
uint256 liquidationId,
FixedPoint.Unsigned memory tokensLiquidated,
FixedPoint.Unsigned memory finalFeeBond
)
{
// Check that this transaction was mined pre-deadline.
require(getCurrentTime() <= deadline, "Mined after deadline");
// Retrieve Position data for sponsor
PositionData storage positionToLiquidate = _getPositionData(sponsor);
tokensLiquidated = FixedPoint.min(maxTokensToLiquidate, positionToLiquidate.tokensOutstanding);
require(tokensLiquidated.isGreaterThan(0));
// Starting values for the Position being liquidated. If withdrawal request amount is > position's collateral,
// then set this to 0, otherwise set it to (startCollateral - withdrawal request amount).
FixedPoint.Unsigned memory startCollateral = _getFeeAdjustedCollateral(positionToLiquidate.rawCollateral);
FixedPoint.Unsigned memory startCollateralNetOfWithdrawal = FixedPoint.fromUnscaledUint(0);
if (positionToLiquidate.withdrawalRequestAmount.isLessThanOrEqual(startCollateral)) {
startCollateralNetOfWithdrawal = startCollateral.sub(positionToLiquidate.withdrawalRequestAmount);
}
// Scoping to get rid of a stack too deep error.
{
FixedPoint.Unsigned memory startTokens = positionToLiquidate.tokensOutstanding;
// The Position's collateralization ratio must be between [minCollateralPerToken, maxCollateralPerToken].
require(
maxCollateralPerToken.mul(startTokens).isGreaterThanOrEqual(startCollateralNetOfWithdrawal),
"CR is more than max liq. price"
);
// minCollateralPerToken >= startCollateralNetOfWithdrawal / startTokens.
require(
minCollateralPerToken.mul(startTokens).isLessThanOrEqual(startCollateralNetOfWithdrawal),
"CR is less than min liq. price"
);
}
// Compute final fee at time of liquidation.
finalFeeBond = _computeFinalFees();
// These will be populated within the scope below.
FixedPoint.Unsigned memory lockedCollateral;
FixedPoint.Unsigned memory liquidatedCollateral;
// Scoping to get rid of a stack too deep error. The amount of tokens to remove from the position
// are not funding-rate adjusted because the multiplier only affects their redemption value, not their
// notional.
{
FixedPoint.Unsigned memory ratio = tokensLiquidated.div(positionToLiquidate.tokensOutstanding);
// The actual amount of collateral that gets moved to the liquidation.
lockedCollateral = startCollateral.mul(ratio);
// For purposes of disputes, it's actually this liquidatedCollateral value that's used. This value is net of
// withdrawal requests.
liquidatedCollateral = startCollateralNetOfWithdrawal.mul(ratio);
// Part of the withdrawal request is also removed. Ideally:
// liquidatedCollateral + withdrawalAmountToRemove = lockedCollateral.
FixedPoint.Unsigned memory withdrawalAmountToRemove =
positionToLiquidate.withdrawalRequestAmount.mul(ratio);
_reduceSponsorPosition(sponsor, tokensLiquidated, lockedCollateral, withdrawalAmountToRemove);
}
// Add to the global liquidation collateral count.
_addCollateral(rawLiquidationCollateral, lockedCollateral.add(finalFeeBond));
// Construct liquidation object.
// Note: All dispute-related values are zeroed out until a dispute occurs. liquidationId is the index of the new
// LiquidationData that is pushed into the array, which is equal to the current length of the array pre-push.
liquidationId = liquidations[sponsor].length;
liquidations[sponsor].push(
LiquidationData({
sponsor: sponsor,
liquidator: msg.sender,
state: Status.NotDisputed,
liquidationTime: getCurrentTime(),
tokensOutstanding: _getFundingRateAppliedTokenDebt(tokensLiquidated),
lockedCollateral: lockedCollateral,
liquidatedCollateral: liquidatedCollateral,
rawUnitCollateral: _convertToRawCollateral(FixedPoint.fromUnscaledUint(1)),
disputer: address(0),
settlementPrice: FixedPoint.fromUnscaledUint(0),
finalFee: finalFeeBond
})
);
// If this liquidation is a subsequent liquidation on the position, and the liquidation size is larger than
// some "griefing threshold", then re-set the liveness. This enables a liquidation against a withdraw request to be
// "dragged out" if the position is very large and liquidators need time to gather funds. The griefing threshold
// is enforced so that liquidations for trivially small # of tokens cannot drag out an honest sponsor's slow withdrawal.
// We arbitrarily set the "griefing threshold" to `minSponsorTokens` because it is the only parameter
// denominated in token currency units and we can avoid adding another parameter.
FixedPoint.Unsigned memory griefingThreshold = minSponsorTokens;
if (
positionToLiquidate.withdrawalRequestPassTimestamp > 0 && // The position is undergoing a slow withdrawal.
positionToLiquidate.withdrawalRequestPassTimestamp > getCurrentTime() && // The slow withdrawal has not yet expired.
tokensLiquidated.isGreaterThanOrEqual(griefingThreshold) // The liquidated token count is above a "griefing threshold".
) {
positionToLiquidate.withdrawalRequestPassTimestamp = getCurrentTime().add(withdrawalLiveness);
}
emit LiquidationCreated(
sponsor,
msg.sender,
liquidationId,
_getFundingRateAppliedTokenDebt(tokensLiquidated).rawValue,
lockedCollateral.rawValue,
liquidatedCollateral.rawValue,
getCurrentTime()
);
// Destroy tokens
tokenCurrency.safeTransferFrom(msg.sender, address(this), tokensLiquidated.rawValue);
tokenCurrency.burn(tokensLiquidated.rawValue);
// Pull final fee from liquidator.
collateralCurrency.safeTransferFrom(msg.sender, address(this), finalFeeBond.rawValue);
}
/**
* @notice Disputes a liquidation, if the caller has enough collateral to post a dispute bond and pay a fixed final
* fee charged on each price request.
* @dev Can only dispute a liquidation before the liquidation expires and if there are no other pending disputes.
* This contract must be approved to spend at least the dispute bond amount of `collateralCurrency`. This dispute
* bond amount is calculated from `disputeBondPercentage` times the collateral in the liquidation.
* @param liquidationId of the disputed liquidation.
* @param sponsor the address of the sponsor whose liquidation is being disputed.
* @return totalPaid amount of collateral charged to disputer (i.e. final fee bond + dispute bond).
*/
function dispute(uint256 liquidationId, address sponsor)
external
disputable(liquidationId, sponsor)
fees()
nonReentrant()
returns (FixedPoint.Unsigned memory totalPaid)
{
LiquidationData storage disputedLiquidation = _getLiquidationData(sponsor, liquidationId);
// Multiply by the unit collateral so the dispute bond is a percentage of the locked collateral after fees.
FixedPoint.Unsigned memory disputeBondAmount =
disputedLiquidation.lockedCollateral.mul(disputeBondPercentage).mul(
_getFeeAdjustedCollateral(disputedLiquidation.rawUnitCollateral)
);
_addCollateral(rawLiquidationCollateral, disputeBondAmount);
// Request a price from DVM. Liquidation is pending dispute until DVM returns a price.
disputedLiquidation.state = Status.Disputed;
disputedLiquidation.disputer = msg.sender;
// Enqueue a request with the DVM.
_requestOraclePrice(disputedLiquidation.liquidationTime);
emit LiquidationDisputed(
sponsor,
disputedLiquidation.liquidator,
msg.sender,
liquidationId,
disputeBondAmount.rawValue
);
totalPaid = disputeBondAmount.add(disputedLiquidation.finalFee);
// Pay the final fee for requesting price from the DVM.
_payFinalFees(msg.sender, disputedLiquidation.finalFee);
// Transfer the dispute bond amount from the caller to this contract.
collateralCurrency.safeTransferFrom(msg.sender, address(this), disputeBondAmount.rawValue);
}
/**
* @notice After a dispute has settled or after a non-disputed liquidation has expired,
* anyone can call this method to disperse payments to the sponsor, liquidator, and disputer.
* @dev If the dispute SUCCEEDED: the sponsor, liquidator, and disputer are eligible for payment.
* If the dispute FAILED: only the liquidator receives payment. This method deletes the liquidation data.
* This method will revert if rewards have already been dispersed.
* @param liquidationId uniquely identifies the sponsor's liquidation.
* @param sponsor address of the sponsor associated with the liquidation.
* @return data about rewards paid out.
*/
function withdrawLiquidation(uint256 liquidationId, address sponsor)
public
withdrawable(liquidationId, sponsor)
fees()
nonReentrant()
returns (RewardsData memory)
{
LiquidationData storage liquidation = _getLiquidationData(sponsor, liquidationId);
// Settles the liquidation if necessary. This call will revert if the price has not resolved yet.
_settle(liquidationId, sponsor);
// Calculate rewards as a function of the TRV.
// Note1: all payouts are scaled by the unit collateral value so all payouts are charged the fees pro rata.
// Note2: the tokenRedemptionValue uses the tokensOutstanding which was calculated using the funding rate at
// liquidation time from _getFundingRateAppliedTokenDebt. Therefore the TRV considers the full debt value at that time.
FixedPoint.Unsigned memory feeAttenuation = _getFeeAdjustedCollateral(liquidation.rawUnitCollateral);
FixedPoint.Unsigned memory settlementPrice = liquidation.settlementPrice;
FixedPoint.Unsigned memory tokenRedemptionValue =
liquidation.tokensOutstanding.mul(settlementPrice).mul(feeAttenuation);
FixedPoint.Unsigned memory collateral = liquidation.lockedCollateral.mul(feeAttenuation);
FixedPoint.Unsigned memory disputerDisputeReward = disputerDisputeRewardPercentage.mul(tokenRedemptionValue);
FixedPoint.Unsigned memory sponsorDisputeReward = sponsorDisputeRewardPercentage.mul(tokenRedemptionValue);
FixedPoint.Unsigned memory disputeBondAmount = collateral.mul(disputeBondPercentage);
FixedPoint.Unsigned memory finalFee = liquidation.finalFee.mul(feeAttenuation);
// There are three main outcome states: either the dispute succeeded, failed or was not updated.
// Based on the state, different parties of a liquidation receive different amounts.
// After assigning rewards based on the liquidation status, decrease the total collateral held in this contract
// by the amount to pay each party. The actual amounts withdrawn might differ if _removeCollateral causes
// precision loss.
RewardsData memory rewards;
if (liquidation.state == Status.DisputeSucceeded) {
// If the dispute is successful then all three users should receive rewards:
// Pay DISPUTER: disputer reward + dispute bond + returned final fee
rewards.payToDisputer = disputerDisputeReward.add(disputeBondAmount).add(finalFee);
// Pay SPONSOR: remaining collateral (collateral - TRV) + sponsor reward
rewards.payToSponsor = sponsorDisputeReward.add(collateral.sub(tokenRedemptionValue));
// Pay LIQUIDATOR: TRV - dispute reward - sponsor reward
// If TRV > Collateral, then subtract rewards from collateral
// NOTE: This should never be below zero since we prevent (sponsorDisputePercentage+disputerDisputePercentage) >= 0 in
// the constructor when these params are set.
rewards.payToLiquidator = tokenRedemptionValue.sub(sponsorDisputeReward).sub(disputerDisputeReward);
// Transfer rewards and debit collateral
rewards.paidToLiquidator = _removeCollateral(rawLiquidationCollateral, rewards.payToLiquidator);
rewards.paidToSponsor = _removeCollateral(rawLiquidationCollateral, rewards.payToSponsor);
rewards.paidToDisputer = _removeCollateral(rawLiquidationCollateral, rewards.payToDisputer);
collateralCurrency.safeTransfer(liquidation.disputer, rewards.paidToDisputer.rawValue);
collateralCurrency.safeTransfer(liquidation.liquidator, rewards.paidToLiquidator.rawValue);
collateralCurrency.safeTransfer(liquidation.sponsor, rewards.paidToSponsor.rawValue);
// In the case of a failed dispute only the liquidator can withdraw.
} else if (liquidation.state == Status.DisputeFailed) {
// Pay LIQUIDATOR: collateral + dispute bond + returned final fee
rewards.payToLiquidator = collateral.add(disputeBondAmount).add(finalFee);
// Transfer rewards and debit collateral
rewards.paidToLiquidator = _removeCollateral(rawLiquidationCollateral, rewards.payToLiquidator);
collateralCurrency.safeTransfer(liquidation.liquidator, rewards.paidToLiquidator.rawValue);
// If the state is pre-dispute but time has passed liveness then there was no dispute. We represent this
// state as a dispute failed and the liquidator can withdraw.
} else if (liquidation.state == Status.NotDisputed) {
// Pay LIQUIDATOR: collateral + returned final fee
rewards.payToLiquidator = collateral.add(finalFee);
// Transfer rewards and debit collateral
rewards.paidToLiquidator = _removeCollateral(rawLiquidationCollateral, rewards.payToLiquidator);
collateralCurrency.safeTransfer(liquidation.liquidator, rewards.paidToLiquidator.rawValue);
}
emit LiquidationWithdrawn(
msg.sender,
rewards.paidToLiquidator.rawValue,
rewards.paidToDisputer.rawValue,
rewards.paidToSponsor.rawValue,
liquidation.state,
settlementPrice.rawValue
);
// Free up space after collateral is withdrawn by removing the liquidation object from the array.
delete liquidations[sponsor][liquidationId];
return rewards;
}
/**
* @notice Gets all liquidation information for a given sponsor address.
* @param sponsor address of the position sponsor.
* @return liquidationData array of all liquidation information for the given sponsor address.
*/
function getLiquidations(address sponsor)
external
view
nonReentrantView()
returns (LiquidationData[] memory liquidationData)
{
return liquidations[sponsor];
}
/****************************************
* INTERNAL FUNCTIONS *
****************************************/
// This settles a liquidation if it is in the Disputed state. If not, it will immediately return.
// If the liquidation is in the Disputed state, but a price is not available, this will revert.
function _settle(uint256 liquidationId, address sponsor) internal {
LiquidationData storage liquidation = _getLiquidationData(sponsor, liquidationId);
// Settlement only happens when state == Disputed and will only happen once per liquidation.
// If this liquidation is not ready to be settled, this method should return immediately.
if (liquidation.state != Status.Disputed) {
return;
}
// Get the returned price from the oracle. If this has not yet resolved will revert.
liquidation.settlementPrice = _getOraclePrice(liquidation.liquidationTime);
// Find the value of the tokens in the underlying collateral.
FixedPoint.Unsigned memory tokenRedemptionValue =
liquidation.tokensOutstanding.mul(liquidation.settlementPrice);
// The required collateral is the value of the tokens in underlying * required collateral ratio.
FixedPoint.Unsigned memory requiredCollateral = tokenRedemptionValue.mul(collateralRequirement);
// If the position has more than the required collateral it is solvent and the dispute is valid (liquidation is invalid)
// Note that this check uses the liquidatedCollateral not the lockedCollateral as this considers withdrawals.
bool disputeSucceeded = liquidation.liquidatedCollateral.isGreaterThanOrEqual(requiredCollateral);
liquidation.state = disputeSucceeded ? Status.DisputeSucceeded : Status.DisputeFailed;
emit DisputeSettled(
msg.sender,
sponsor,
liquidation.liquidator,
liquidation.disputer,
liquidationId,
disputeSucceeded
);
}
function _pfc() internal view override returns (FixedPoint.Unsigned memory) {
return super._pfc().add(_getFeeAdjustedCollateral(rawLiquidationCollateral));
}
function _getLiquidationData(address sponsor, uint256 liquidationId)
internal
view
returns (LiquidationData storage liquidation)
{
LiquidationData[] storage liquidationArray = liquidations[sponsor];
// Revert if the caller is attempting to access an invalid liquidation
// (one that has never been created or one has never been initialized).
require(
liquidationId < liquidationArray.length && liquidationArray[liquidationId].state != Status.Uninitialized
);
return liquidationArray[liquidationId];
}
function _getLiquidationExpiry(LiquidationData storage liquidation) internal view returns (uint256) {
return liquidation.liquidationTime.add(liquidationLiveness);
}
// These internal functions are supposed to act identically to modifiers, but re-used modifiers
// unnecessarily increase contract bytecode size.
// source: https://blog.polymath.network/solidity-tips-and-tricks-to-save-gas-and-reduce-bytecode-size-c44580b218e6
function _disputable(uint256 liquidationId, address sponsor) internal view {
LiquidationData storage liquidation = _getLiquidationData(sponsor, liquidationId);
require(
(getCurrentTime() < _getLiquidationExpiry(liquidation)) && (liquidation.state == Status.NotDisputed),
"Liquidation not disputable"
);
}
function _withdrawable(uint256 liquidationId, address sponsor) internal view {
LiquidationData storage liquidation = _getLiquidationData(sponsor, liquidationId);
Status state = liquidation.state;
// Must be disputed or the liquidation has passed expiry.
require(
(state > Status.NotDisputed) ||
((_getLiquidationExpiry(liquidation) <= getCurrentTime()) && (state == Status.NotDisputed))
);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../../common/implementation/FixedPoint.sol";
import "../../common/interfaces/ExpandedIERC20.sol";
import "../../oracle/interfaces/OracleInterface.sol";
import "../../oracle/interfaces/IdentifierWhitelistInterface.sol";
import "../../oracle/implementation/Constants.sol";
import "../common/FundingRateApplier.sol";
/**
* @title Financial contract with priceless position management.
* @notice Handles positions for multiple sponsors in an optimistic (i.e., priceless) way without relying
* on a price feed. On construction, deploys a new ERC20, managed by this contract, that is the synthetic token.
*/
contract PerpetualPositionManager is FundingRateApplier {
using SafeMath for uint256;
using FixedPoint for FixedPoint.Unsigned;
using SafeERC20 for IERC20;
using SafeERC20 for ExpandedIERC20;
/****************************************
* PRICELESS POSITION DATA STRUCTURES *
****************************************/
// Represents a single sponsor's position. All collateral is held by this contract.
// This struct acts as bookkeeping for how much of that collateral is allocated to each sponsor.
struct PositionData {
FixedPoint.Unsigned tokensOutstanding;
// Tracks pending withdrawal requests. A withdrawal request is pending if `withdrawalRequestPassTimestamp != 0`.
uint256 withdrawalRequestPassTimestamp;
FixedPoint.Unsigned withdrawalRequestAmount;
// Raw collateral value. This value should never be accessed directly -- always use _getFeeAdjustedCollateral().
// To add or remove collateral, use _addCollateral() and _removeCollateral().
FixedPoint.Unsigned rawCollateral;
}
// Maps sponsor addresses to their positions. Each sponsor can have only one position.
mapping(address => PositionData) public positions;
// Keep track of the total collateral and tokens across all positions to enable calculating the
// global collateralization ratio without iterating over all positions.
FixedPoint.Unsigned public totalTokensOutstanding;
// Similar to the rawCollateral in PositionData, this value should not be used directly.
// _getFeeAdjustedCollateral(), _addCollateral() and _removeCollateral() must be used to access and adjust.
FixedPoint.Unsigned public rawTotalPositionCollateral;
// Synthetic token created by this contract.
ExpandedIERC20 public tokenCurrency;
// Unique identifier for DVM price feed ticker.
bytes32 public priceIdentifier;
// Time that has to elapse for a withdrawal request to be considered passed, if no liquidations occur.
// !!Note: The lower the withdrawal liveness value, the more risk incurred by the contract.
// Extremely low liveness values increase the chance that opportunistic invalid withdrawal requests
// expire without liquidation, thereby increasing the insolvency risk for the contract as a whole. An insolvent
// contract is extremely risky for any sponsor or synthetic token holder for the contract.
uint256 public withdrawalLiveness;
// Minimum number of tokens in a sponsor's position.
FixedPoint.Unsigned public minSponsorTokens;
// Expiry price pulled from the DVM in the case of an emergency shutdown.
FixedPoint.Unsigned public emergencyShutdownPrice;
/****************************************
* EVENTS *
****************************************/
event Deposit(address indexed sponsor, uint256 indexed collateralAmount);
event Withdrawal(address indexed sponsor, uint256 indexed collateralAmount);
event RequestWithdrawal(address indexed sponsor, uint256 indexed collateralAmount);
event RequestWithdrawalExecuted(address indexed sponsor, uint256 indexed collateralAmount);
event RequestWithdrawalCanceled(address indexed sponsor, uint256 indexed collateralAmount);
event PositionCreated(address indexed sponsor, uint256 indexed collateralAmount, uint256 indexed tokenAmount);
event NewSponsor(address indexed sponsor);
event EndedSponsorPosition(address indexed sponsor);
event Redeem(address indexed sponsor, uint256 indexed collateralAmount, uint256 indexed tokenAmount);
event Repay(address indexed sponsor, uint256 indexed numTokensRepaid, uint256 indexed newTokenCount);
event EmergencyShutdown(address indexed caller, uint256 shutdownTimestamp);
event SettleEmergencyShutdown(
address indexed caller,
uint256 indexed collateralReturned,
uint256 indexed tokensBurned
);
/****************************************
* MODIFIERS *
****************************************/
modifier onlyCollateralizedPosition(address sponsor) {
_onlyCollateralizedPosition(sponsor);
_;
}
modifier noPendingWithdrawal(address sponsor) {
_positionHasNoPendingWithdrawal(sponsor);
_;
}
/**
* @notice Construct the PerpetualPositionManager.
* @dev Deployer of this contract should consider carefully which parties have ability to mint and burn
* the synthetic tokens referenced by `_tokenAddress`. This contract's security assumes that no external accounts
* can mint new tokens, which could be used to steal all of this contract's locked collateral.
* We recommend to only use synthetic token contracts whose sole Owner role (the role capable of adding & removing roles)
* is assigned to this contract, whose sole Minter role is assigned to this contract, and whose
* total supply is 0 prior to construction of this contract.
* @param _withdrawalLiveness liveness delay, in seconds, for pending withdrawals.
* @param _collateralAddress ERC20 token used as collateral for all positions.
* @param _tokenAddress ERC20 token used as synthetic token.
* @param _finderAddress UMA protocol Finder used to discover other protocol contracts.
* @param _priceIdentifier registered in the DVM for the synthetic.
* @param _fundingRateIdentifier Unique identifier for DVM price feed ticker for child financial contract.
* @param _minSponsorTokens minimum number of tokens that must exist at any time in a position.
* @param _tokenScaling initial scaling to apply to the token value (i.e. scales the tracking index).
* @param _timerAddress Contract that stores the current time in a testing environment. Set to 0x0 for production.
*/
constructor(
uint256 _withdrawalLiveness,
address _collateralAddress,
address _tokenAddress,
address _finderAddress,
bytes32 _priceIdentifier,
bytes32 _fundingRateIdentifier,
FixedPoint.Unsigned memory _minSponsorTokens,
address _configStoreAddress,
FixedPoint.Unsigned memory _tokenScaling,
address _timerAddress
)
FundingRateApplier(
_fundingRateIdentifier,
_collateralAddress,
_finderAddress,
_configStoreAddress,
_tokenScaling,
_timerAddress
)
{
require(_getIdentifierWhitelist().isIdentifierSupported(_priceIdentifier));
withdrawalLiveness = _withdrawalLiveness;
tokenCurrency = ExpandedIERC20(_tokenAddress);
minSponsorTokens = _minSponsorTokens;
priceIdentifier = _priceIdentifier;
}
/****************************************
* POSITION FUNCTIONS *
****************************************/
/**
* @notice Transfers `collateralAmount` of `collateralCurrency` into the specified sponsor's position.
* @dev Increases the collateralization level of a position after creation. This contract must be approved to spend
* at least `collateralAmount` of `collateralCurrency`.
* @param sponsor the sponsor to credit the deposit to.
* @param collateralAmount total amount of collateral tokens to be sent to the sponsor's position.
*/
function depositTo(address sponsor, FixedPoint.Unsigned memory collateralAmount)
public
notEmergencyShutdown()
noPendingWithdrawal(sponsor)
fees()
nonReentrant()
{
require(collateralAmount.isGreaterThan(0));
PositionData storage positionData = _getPositionData(sponsor);
// Increase the position and global collateral balance by collateral amount.
_incrementCollateralBalances(positionData, collateralAmount);
emit Deposit(sponsor, collateralAmount.rawValue);
// Move collateral currency from sender to contract.
collateralCurrency.safeTransferFrom(msg.sender, address(this), collateralAmount.rawValue);
}
/**
* @notice Transfers `collateralAmount` of `collateralCurrency` into the caller's position.
* @dev Increases the collateralization level of a position after creation. This contract must be approved to spend
* at least `collateralAmount` of `collateralCurrency`.
* @param collateralAmount total amount of collateral tokens to be sent to the sponsor's position.
*/
function deposit(FixedPoint.Unsigned memory collateralAmount) public {
// This is just a thin wrapper over depositTo that specified the sender as the sponsor.
depositTo(msg.sender, collateralAmount);
}
/**
* @notice Transfers `collateralAmount` of `collateralCurrency` from the sponsor's position to the sponsor.
* @dev Reverts if the withdrawal puts this position's collateralization ratio below the global collateralization
* ratio. In that case, use `requestWithdrawal`. Might not withdraw the full requested amount to account for precision loss.
* @param collateralAmount is the amount of collateral to withdraw.
* @return amountWithdrawn The actual amount of collateral withdrawn.
*/
function withdraw(FixedPoint.Unsigned memory collateralAmount)
public
notEmergencyShutdown()
noPendingWithdrawal(msg.sender)
fees()
nonReentrant()
returns (FixedPoint.Unsigned memory amountWithdrawn)
{
require(collateralAmount.isGreaterThan(0));
PositionData storage positionData = _getPositionData(msg.sender);
// Decrement the sponsor's collateral and global collateral amounts. Check the GCR between decrement to ensure
// position remains above the GCR within the withdrawal. If this is not the case the caller must submit a request.
amountWithdrawn = _decrementCollateralBalancesCheckGCR(positionData, collateralAmount);
emit Withdrawal(msg.sender, amountWithdrawn.rawValue);
// Move collateral currency from contract to sender.
// Note: that we move the amount of collateral that is decreased from rawCollateral (inclusive of fees)
// instead of the user requested amount. This eliminates precision loss that could occur
// where the user withdraws more collateral than rawCollateral is decremented by.
collateralCurrency.safeTransfer(msg.sender, amountWithdrawn.rawValue);
}
/**
* @notice Starts a withdrawal request that, if passed, allows the sponsor to withdraw from their position.
* @dev The request will be pending for `withdrawalLiveness`, during which the position can be liquidated.
* @param collateralAmount the amount of collateral requested to withdraw
*/
function requestWithdrawal(FixedPoint.Unsigned memory collateralAmount)
public
notEmergencyShutdown()
noPendingWithdrawal(msg.sender)
nonReentrant()
{
PositionData storage positionData = _getPositionData(msg.sender);
require(
collateralAmount.isGreaterThan(0) &&
collateralAmount.isLessThanOrEqual(_getFeeAdjustedCollateral(positionData.rawCollateral))
);
// Update the position object for the user.
positionData.withdrawalRequestPassTimestamp = getCurrentTime().add(withdrawalLiveness);
positionData.withdrawalRequestAmount = collateralAmount;
emit RequestWithdrawal(msg.sender, collateralAmount.rawValue);
}
/**
* @notice After a passed withdrawal request (i.e., by a call to `requestWithdrawal` and waiting
* `withdrawalLiveness`), withdraws `positionData.withdrawalRequestAmount` of collateral currency.
* @dev Might not withdraw the full requested amount in order to account for precision loss or if the full requested
* amount exceeds the collateral in the position (due to paying fees).
* @return amountWithdrawn The actual amount of collateral withdrawn.
*/
function withdrawPassedRequest()
external
notEmergencyShutdown()
fees()
nonReentrant()
returns (FixedPoint.Unsigned memory amountWithdrawn)
{
PositionData storage positionData = _getPositionData(msg.sender);
require(
positionData.withdrawalRequestPassTimestamp != 0 &&
positionData.withdrawalRequestPassTimestamp <= getCurrentTime()
);
// If withdrawal request amount is > position collateral, then withdraw the full collateral amount.
// This situation is possible due to fees charged since the withdrawal was originally requested.
FixedPoint.Unsigned memory amountToWithdraw = positionData.withdrawalRequestAmount;
if (positionData.withdrawalRequestAmount.isGreaterThan(_getFeeAdjustedCollateral(positionData.rawCollateral))) {
amountToWithdraw = _getFeeAdjustedCollateral(positionData.rawCollateral);
}
// Decrement the sponsor's collateral and global collateral amounts.
amountWithdrawn = _decrementCollateralBalances(positionData, amountToWithdraw);
// Reset withdrawal request by setting withdrawal amount and withdrawal timestamp to 0.
_resetWithdrawalRequest(positionData);
// Transfer approved withdrawal amount from the contract to the caller.
collateralCurrency.safeTransfer(msg.sender, amountWithdrawn.rawValue);
emit RequestWithdrawalExecuted(msg.sender, amountWithdrawn.rawValue);
}
/**
* @notice Cancels a pending withdrawal request.
*/
function cancelWithdrawal() external notEmergencyShutdown() nonReentrant() {
PositionData storage positionData = _getPositionData(msg.sender);
// No pending withdrawal require message removed to save bytecode.
require(positionData.withdrawalRequestPassTimestamp != 0);
emit RequestWithdrawalCanceled(msg.sender, positionData.withdrawalRequestAmount.rawValue);
// Reset withdrawal request by setting withdrawal amount and withdrawal timestamp to 0.
_resetWithdrawalRequest(positionData);
}
/**
* @notice Creates tokens by creating a new position or by augmenting an existing position. Pulls `collateralAmount
* ` into the sponsor's position and mints `numTokens` of `tokenCurrency`.
* @dev This contract must have the Minter role for the `tokenCurrency`.
* @dev Reverts if minting these tokens would put the position's collateralization ratio below the
* global collateralization ratio. This contract must be approved to spend at least `collateralAmount` of
* `collateralCurrency`.
* @param collateralAmount is the number of collateral tokens to collateralize the position with
* @param numTokens is the number of tokens to mint from the position.
*/
function create(FixedPoint.Unsigned memory collateralAmount, FixedPoint.Unsigned memory numTokens)
public
notEmergencyShutdown()
fees()
nonReentrant()
{
PositionData storage positionData = positions[msg.sender];
// Either the new create ratio or the resultant position CR must be above the current GCR.
require(
(_checkCollateralization(
_getFeeAdjustedCollateral(positionData.rawCollateral).add(collateralAmount),
positionData.tokensOutstanding.add(numTokens)
) || _checkCollateralization(collateralAmount, numTokens)),
"Insufficient collateral"
);
require(positionData.withdrawalRequestPassTimestamp == 0);
if (positionData.tokensOutstanding.isEqual(0)) {
require(numTokens.isGreaterThanOrEqual(minSponsorTokens));
emit NewSponsor(msg.sender);
}
// Increase the position and global collateral balance by collateral amount.
_incrementCollateralBalances(positionData, collateralAmount);
// Add the number of tokens created to the position's outstanding tokens.
positionData.tokensOutstanding = positionData.tokensOutstanding.add(numTokens);
totalTokensOutstanding = totalTokensOutstanding.add(numTokens);
emit PositionCreated(msg.sender, collateralAmount.rawValue, numTokens.rawValue);
// Transfer tokens into the contract from caller and mint corresponding synthetic tokens to the caller's address.
collateralCurrency.safeTransferFrom(msg.sender, address(this), collateralAmount.rawValue);
// Note: revert reason removed to save bytecode.
require(tokenCurrency.mint(msg.sender, numTokens.rawValue));
}
/**
* @notice Burns `numTokens` of `tokenCurrency` and sends back the proportional amount of `collateralCurrency`.
* @dev Can only be called by a token sponsor. Might not redeem the full proportional amount of collateral
* in order to account for precision loss. This contract must be approved to spend at least `numTokens` of
* `tokenCurrency`.
* @dev This contract must have the Burner role for the `tokenCurrency`.
* @param numTokens is the number of tokens to be burnt for a commensurate amount of collateral.
* @return amountWithdrawn The actual amount of collateral withdrawn.
*/
function redeem(FixedPoint.Unsigned memory numTokens)
public
notEmergencyShutdown()
noPendingWithdrawal(msg.sender)
fees()
nonReentrant()
returns (FixedPoint.Unsigned memory amountWithdrawn)
{
PositionData storage positionData = _getPositionData(msg.sender);
require(numTokens.isLessThanOrEqual(positionData.tokensOutstanding));
FixedPoint.Unsigned memory fractionRedeemed = numTokens.div(positionData.tokensOutstanding);
FixedPoint.Unsigned memory collateralRedeemed =
fractionRedeemed.mul(_getFeeAdjustedCollateral(positionData.rawCollateral));
// If redemption returns all tokens the sponsor has then we can delete their position. Else, downsize.
if (positionData.tokensOutstanding.isEqual(numTokens)) {
amountWithdrawn = _deleteSponsorPosition(msg.sender);
} else {
// Decrement the sponsor's collateral and global collateral amounts.
amountWithdrawn = _decrementCollateralBalances(positionData, collateralRedeemed);
// Decrease the sponsors position tokens size. Ensure it is above the min sponsor size.
FixedPoint.Unsigned memory newTokenCount = positionData.tokensOutstanding.sub(numTokens);
require(newTokenCount.isGreaterThanOrEqual(minSponsorTokens));
positionData.tokensOutstanding = newTokenCount;
// Update the totalTokensOutstanding after redemption.
totalTokensOutstanding = totalTokensOutstanding.sub(numTokens);
}
emit Redeem(msg.sender, amountWithdrawn.rawValue, numTokens.rawValue);
// Transfer collateral from contract to caller and burn callers synthetic tokens.
collateralCurrency.safeTransfer(msg.sender, amountWithdrawn.rawValue);
tokenCurrency.safeTransferFrom(msg.sender, address(this), numTokens.rawValue);
tokenCurrency.burn(numTokens.rawValue);
}
/**
* @notice Burns `numTokens` of `tokenCurrency` to decrease sponsors position size, without sending back `collateralCurrency`.
* This is done by a sponsor to increase position CR. Resulting size is bounded by minSponsorTokens.
* @dev Can only be called by token sponsor. This contract must be approved to spend `numTokens` of `tokenCurrency`.
* @dev This contract must have the Burner role for the `tokenCurrency`.
* @param numTokens is the number of tokens to be burnt from the sponsor's debt position.
*/
function repay(FixedPoint.Unsigned memory numTokens)
public
notEmergencyShutdown()
noPendingWithdrawal(msg.sender)
fees()
nonReentrant()
{
PositionData storage positionData = _getPositionData(msg.sender);
require(numTokens.isLessThanOrEqual(positionData.tokensOutstanding));
// Decrease the sponsors position tokens size. Ensure it is above the min sponsor size.
FixedPoint.Unsigned memory newTokenCount = positionData.tokensOutstanding.sub(numTokens);
require(newTokenCount.isGreaterThanOrEqual(minSponsorTokens));
positionData.tokensOutstanding = newTokenCount;
// Update the totalTokensOutstanding after redemption.
totalTokensOutstanding = totalTokensOutstanding.sub(numTokens);
emit Repay(msg.sender, numTokens.rawValue, newTokenCount.rawValue);
// Transfer the tokens back from the sponsor and burn them.
tokenCurrency.safeTransferFrom(msg.sender, address(this), numTokens.rawValue);
tokenCurrency.burn(numTokens.rawValue);
}
/**
* @notice If the contract is emergency shutdown then all token holders and sponsors can redeem their tokens or
* remaining collateral for underlying at the prevailing price defined by a DVM vote.
* @dev This burns all tokens from the caller of `tokenCurrency` and sends back the resolved settlement value of
* `collateralCurrency`. Might not redeem the full proportional amount of collateral in order to account for
* precision loss. This contract must be approved to spend `tokenCurrency` at least up to the caller's full balance.
* @dev This contract must have the Burner role for the `tokenCurrency`.
* @dev Note that this function does not call the updateFundingRate modifier to update the funding rate as this
* function is only called after an emergency shutdown & there should be no funding rate updates after the shutdown.
* @return amountWithdrawn The actual amount of collateral withdrawn.
*/
function settleEmergencyShutdown()
external
isEmergencyShutdown()
fees()
nonReentrant()
returns (FixedPoint.Unsigned memory amountWithdrawn)
{
// Set the emergency shutdown price as resolved from the DVM. If DVM has not resolved will revert.
if (emergencyShutdownPrice.isEqual(FixedPoint.fromUnscaledUint(0))) {
emergencyShutdownPrice = _getOracleEmergencyShutdownPrice();
}
// Get caller's tokens balance and calculate amount of underlying entitled to them.
FixedPoint.Unsigned memory tokensToRedeem = FixedPoint.Unsigned(tokenCurrency.balanceOf(msg.sender));
FixedPoint.Unsigned memory totalRedeemableCollateral =
_getFundingRateAppliedTokenDebt(tokensToRedeem).mul(emergencyShutdownPrice);
// If the caller is a sponsor with outstanding collateral they are also entitled to their excess collateral after their debt.
PositionData storage positionData = positions[msg.sender];
if (_getFeeAdjustedCollateral(positionData.rawCollateral).isGreaterThan(0)) {
// Calculate the underlying entitled to a token sponsor. This is collateral - debt in underlying with
// the funding rate applied to the outstanding token debt.
FixedPoint.Unsigned memory tokenDebtValueInCollateral =
_getFundingRateAppliedTokenDebt(positionData.tokensOutstanding).mul(emergencyShutdownPrice);
FixedPoint.Unsigned memory positionCollateral = _getFeeAdjustedCollateral(positionData.rawCollateral);
// If the debt is greater than the remaining collateral, they cannot redeem anything.
FixedPoint.Unsigned memory positionRedeemableCollateral =
tokenDebtValueInCollateral.isLessThan(positionCollateral)
? positionCollateral.sub(tokenDebtValueInCollateral)
: FixedPoint.Unsigned(0);
// Add the number of redeemable tokens for the sponsor to their total redeemable collateral.
totalRedeemableCollateral = totalRedeemableCollateral.add(positionRedeemableCollateral);
// Reset the position state as all the value has been removed after settlement.
delete positions[msg.sender];
emit EndedSponsorPosition(msg.sender);
}
// Take the min of the remaining collateral and the collateral "owed". If the contract is undercapitalized,
// the caller will get as much collateral as the contract can pay out.
FixedPoint.Unsigned memory payout =
FixedPoint.min(_getFeeAdjustedCollateral(rawTotalPositionCollateral), totalRedeemableCollateral);
// Decrement total contract collateral and outstanding debt.
amountWithdrawn = _removeCollateral(rawTotalPositionCollateral, payout);
totalTokensOutstanding = totalTokensOutstanding.sub(tokensToRedeem);
emit SettleEmergencyShutdown(msg.sender, amountWithdrawn.rawValue, tokensToRedeem.rawValue);
// Transfer tokens & collateral and burn the redeemed tokens.
collateralCurrency.safeTransfer(msg.sender, amountWithdrawn.rawValue);
tokenCurrency.safeTransferFrom(msg.sender, address(this), tokensToRedeem.rawValue);
tokenCurrency.burn(tokensToRedeem.rawValue);
}
/****************************************
* GLOBAL STATE FUNCTIONS *
****************************************/
/**
* @notice Premature contract settlement under emergency circumstances.
* @dev Only the governor can call this function as they are permissioned within the `FinancialContractAdmin`.
* Upon emergency shutdown, the contract settlement time is set to the shutdown time. This enables withdrawal
* to occur via the `settleEmergencyShutdown` function.
*/
function emergencyShutdown() external override notEmergencyShutdown() fees() nonReentrant() {
// Note: revert reason removed to save bytecode.
require(msg.sender == _getFinancialContractsAdminAddress());
emergencyShutdownTimestamp = getCurrentTime();
_requestOraclePrice(emergencyShutdownTimestamp);
emit EmergencyShutdown(msg.sender, emergencyShutdownTimestamp);
}
/**
* @notice Theoretically supposed to pay fees and move money between margin accounts to make sure they
* reflect the NAV of the contract. However, this functionality doesn't apply to this contract.
* @dev This is supposed to be implemented by any contract that inherits `AdministrateeInterface` and callable
* only by the Governor contract. This method is therefore minimally implemented in this contract and does nothing.
*/
function remargin() external override {
return;
}
/**
* @notice Accessor method for a sponsor's collateral.
* @dev This is necessary because the struct returned by the positions() method shows
* rawCollateral, which isn't a user-readable value.
* @dev This method accounts for pending regular fees that have not yet been withdrawn from this contract, for
* example if the `lastPaymentTime != currentTime`.
* @param sponsor address whose collateral amount is retrieved.
* @return collateralAmount amount of collateral within a sponsors position.
*/
function getCollateral(address sponsor)
external
view
nonReentrantView()
returns (FixedPoint.Unsigned memory collateralAmount)
{
// Note: do a direct access to avoid the validity check.
return _getPendingRegularFeeAdjustedCollateral(_getFeeAdjustedCollateral(positions[sponsor].rawCollateral));
}
/**
* @notice Accessor method for the total collateral stored within the PerpetualPositionManager.
* @return totalCollateral amount of all collateral within the position manager.
*/
function totalPositionCollateral()
external
view
nonReentrantView()
returns (FixedPoint.Unsigned memory totalCollateral)
{
return _getPendingRegularFeeAdjustedCollateral(_getFeeAdjustedCollateral(rawTotalPositionCollateral));
}
function getFundingRateAppliedTokenDebt(FixedPoint.Unsigned memory rawTokenDebt)
external
view
nonReentrantView()
returns (FixedPoint.Unsigned memory totalCollateral)
{
return _getFundingRateAppliedTokenDebt(rawTokenDebt);
}
/****************************************
* INTERNAL FUNCTIONS *
****************************************/
// Reduces a sponsor's position and global counters by the specified parameters. Handles deleting the entire
// position if the entire position is being removed. Does not make any external transfers.
function _reduceSponsorPosition(
address sponsor,
FixedPoint.Unsigned memory tokensToRemove,
FixedPoint.Unsigned memory collateralToRemove,
FixedPoint.Unsigned memory withdrawalAmountToRemove
) internal {
PositionData storage positionData = _getPositionData(sponsor);
// If the entire position is being removed, delete it instead.
if (
tokensToRemove.isEqual(positionData.tokensOutstanding) &&
_getFeeAdjustedCollateral(positionData.rawCollateral).isEqual(collateralToRemove)
) {
_deleteSponsorPosition(sponsor);
return;
}
// Decrement the sponsor's collateral and global collateral amounts.
_decrementCollateralBalances(positionData, collateralToRemove);
// Ensure that the sponsor will meet the min position size after the reduction.
positionData.tokensOutstanding = positionData.tokensOutstanding.sub(tokensToRemove);
require(positionData.tokensOutstanding.isGreaterThanOrEqual(minSponsorTokens));
// Decrement the position's withdrawal amount.
positionData.withdrawalRequestAmount = positionData.withdrawalRequestAmount.sub(withdrawalAmountToRemove);
// Decrement the total outstanding tokens in the overall contract.
totalTokensOutstanding = totalTokensOutstanding.sub(tokensToRemove);
}
// Deletes a sponsor's position and updates global counters. Does not make any external transfers.
function _deleteSponsorPosition(address sponsor) internal returns (FixedPoint.Unsigned memory) {
PositionData storage positionToLiquidate = _getPositionData(sponsor);
FixedPoint.Unsigned memory startingGlobalCollateral = _getFeeAdjustedCollateral(rawTotalPositionCollateral);
// Remove the collateral and outstanding from the overall total position.
rawTotalPositionCollateral = rawTotalPositionCollateral.sub(positionToLiquidate.rawCollateral);
totalTokensOutstanding = totalTokensOutstanding.sub(positionToLiquidate.tokensOutstanding);
// Reset the sponsors position to have zero outstanding and collateral.
delete positions[sponsor];
emit EndedSponsorPosition(sponsor);
// Return fee-adjusted amount of collateral deleted from position.
return startingGlobalCollateral.sub(_getFeeAdjustedCollateral(rawTotalPositionCollateral));
}
function _pfc() internal view virtual override returns (FixedPoint.Unsigned memory) {
return _getFeeAdjustedCollateral(rawTotalPositionCollateral);
}
function _getPositionData(address sponsor)
internal
view
onlyCollateralizedPosition(sponsor)
returns (PositionData storage)
{
return positions[sponsor];
}
function _getIdentifierWhitelist() internal view returns (IdentifierWhitelistInterface) {
return IdentifierWhitelistInterface(finder.getImplementationAddress(OracleInterfaces.IdentifierWhitelist));
}
function _getOracle() internal view returns (OracleInterface) {
return OracleInterface(finder.getImplementationAddress(OracleInterfaces.Oracle));
}
function _getFinancialContractsAdminAddress() internal view returns (address) {
return finder.getImplementationAddress(OracleInterfaces.FinancialContractsAdmin);
}
// Requests a price for `priceIdentifier` at `requestedTime` from the Oracle.
function _requestOraclePrice(uint256 requestedTime) internal {
_getOracle().requestPrice(priceIdentifier, requestedTime);
}
// Fetches a resolved Oracle price from the Oracle. Reverts if the Oracle hasn't resolved for this request.
function _getOraclePrice(uint256 requestedTime) internal view returns (FixedPoint.Unsigned memory price) {
// Create an instance of the oracle and get the price. If the price is not resolved revert.
int256 oraclePrice = _getOracle().getPrice(priceIdentifier, requestedTime);
// For now we don't want to deal with negative prices in positions.
if (oraclePrice < 0) {
oraclePrice = 0;
}
return FixedPoint.Unsigned(uint256(oraclePrice));
}
// Fetches a resolved Oracle price from the Oracle. Reverts if the Oracle hasn't resolved for this request.
function _getOracleEmergencyShutdownPrice() internal view returns (FixedPoint.Unsigned memory) {
return _getOraclePrice(emergencyShutdownTimestamp);
}
// Reset withdrawal request by setting the withdrawal request and withdrawal timestamp to 0.
function _resetWithdrawalRequest(PositionData storage positionData) internal {
positionData.withdrawalRequestAmount = FixedPoint.fromUnscaledUint(0);
positionData.withdrawalRequestPassTimestamp = 0;
}
// Ensure individual and global consistency when increasing collateral balances. Returns the change to the position.
function _incrementCollateralBalances(
PositionData storage positionData,
FixedPoint.Unsigned memory collateralAmount
) internal returns (FixedPoint.Unsigned memory) {
_addCollateral(positionData.rawCollateral, collateralAmount);
return _addCollateral(rawTotalPositionCollateral, collateralAmount);
}
// Ensure individual and global consistency when decrementing collateral balances. Returns the change to the
// position. We elect to return the amount that the global collateral is decreased by, rather than the individual
// position's collateral, because we need to maintain the invariant that the global collateral is always
// <= the collateral owned by the contract to avoid reverts on withdrawals. The amount returned = amount withdrawn.
function _decrementCollateralBalances(
PositionData storage positionData,
FixedPoint.Unsigned memory collateralAmount
) internal returns (FixedPoint.Unsigned memory) {
_removeCollateral(positionData.rawCollateral, collateralAmount);
return _removeCollateral(rawTotalPositionCollateral, collateralAmount);
}
// Ensure individual and global consistency when decrementing collateral balances. Returns the change to the position.
// This function is similar to the _decrementCollateralBalances function except this function checks position GCR
// between the decrements. This ensures that collateral removal will not leave the position undercollateralized.
function _decrementCollateralBalancesCheckGCR(
PositionData storage positionData,
FixedPoint.Unsigned memory collateralAmount
) internal returns (FixedPoint.Unsigned memory) {
_removeCollateral(positionData.rawCollateral, collateralAmount);
require(_checkPositionCollateralization(positionData), "CR below GCR");
return _removeCollateral(rawTotalPositionCollateral, collateralAmount);
}
// These internal functions are supposed to act identically to modifiers, but re-used modifiers
// unnecessarily increase contract bytecode size.
// source: https://blog.polymath.network/solidity-tips-and-tricks-to-save-gas-and-reduce-bytecode-size-c44580b218e6
function _onlyCollateralizedPosition(address sponsor) internal view {
require(_getFeeAdjustedCollateral(positions[sponsor].rawCollateral).isGreaterThan(0));
}
// Note: This checks whether an already existing position has a pending withdrawal. This cannot be used on the
// `create` method because it is possible that `create` is called on a new position (i.e. one without any collateral
// or tokens outstanding) which would fail the `onlyCollateralizedPosition` modifier on `_getPositionData`.
function _positionHasNoPendingWithdrawal(address sponsor) internal view {
require(_getPositionData(sponsor).withdrawalRequestPassTimestamp == 0);
}
/****************************************
* PRIVATE FUNCTIONS *
****************************************/
function _checkPositionCollateralization(PositionData storage positionData) private view returns (bool) {
return
_checkCollateralization(
_getFeeAdjustedCollateral(positionData.rawCollateral),
positionData.tokensOutstanding
);
}
// Checks whether the provided `collateral` and `numTokens` have a collateralization ratio above the global
// collateralization ratio.
function _checkCollateralization(FixedPoint.Unsigned memory collateral, FixedPoint.Unsigned memory numTokens)
private
view
returns (bool)
{
FixedPoint.Unsigned memory global =
_getCollateralizationRatio(_getFeeAdjustedCollateral(rawTotalPositionCollateral), totalTokensOutstanding);
FixedPoint.Unsigned memory thisChange = _getCollateralizationRatio(collateral, numTokens);
return !global.isGreaterThan(thisChange);
}
function _getCollateralizationRatio(FixedPoint.Unsigned memory collateral, FixedPoint.Unsigned memory numTokens)
private
pure
returns (FixedPoint.Unsigned memory ratio)
{
return numTokens.isLessThanOrEqual(0) ? FixedPoint.fromUnscaledUint(0) : collateral.div(numTokens);
}
function _getTokenAddress() internal view override returns (address) {
return address(tokenCurrency);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/utils/math/SafeCast.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../../common/implementation/Lockable.sol";
import "../../common/implementation/FixedPoint.sol";
import "../../common/implementation/Testable.sol";
import "../../oracle/implementation/Constants.sol";
import "../../oracle/interfaces/OptimisticOracleInterface.sol";
import "../perpetual-multiparty/ConfigStoreInterface.sol";
import "./EmergencyShutdownable.sol";
import "./FeePayer.sol";
/**
* @title FundingRateApplier contract.
* @notice Provides funding rate payment functionality for the Perpetual contract.
*/
abstract contract FundingRateApplier is EmergencyShutdownable, FeePayer {
using FixedPoint for FixedPoint.Unsigned;
using FixedPoint for FixedPoint.Signed;
using SafeERC20 for IERC20;
using SafeMath for uint256;
/****************************************
* FUNDING RATE APPLIER DATA STRUCTURES *
****************************************/
struct FundingRate {
// Current funding rate value.
FixedPoint.Signed rate;
// Identifier to retrieve the funding rate.
bytes32 identifier;
// Tracks the cumulative funding payments that have been paid to the sponsors.
// The multiplier starts at 1, and is updated by computing cumulativeFundingRateMultiplier * (1 + effectivePayment).
// Put another way, the cumulativeFeeMultiplier is (1 + effectivePayment1) * (1 + effectivePayment2) ...
// For example:
// The cumulativeFundingRateMultiplier should start at 1.
// If a 1% funding payment is paid to sponsors, the multiplier should update to 1.01.
// If another 1% fee is charged, the multiplier should be 1.01^2 (1.0201).
FixedPoint.Unsigned cumulativeMultiplier;
// Most recent time that the funding rate was updated.
uint256 updateTime;
// Most recent time that the funding rate was applied and changed the cumulative multiplier.
uint256 applicationTime;
// The time for the active (if it exists) funding rate proposal. 0 otherwise.
uint256 proposalTime;
}
FundingRate public fundingRate;
// Remote config store managed an owner.
ConfigStoreInterface public configStore;
/****************************************
* EVENTS *
****************************************/
event FundingRateUpdated(int256 newFundingRate, uint256 indexed updateTime, uint256 reward);
/****************************************
* MODIFIERS *
****************************************/
// This is overridden to both pay fees (which is done by applyFundingRate()) and apply the funding rate.
modifier fees override {
// Note: the funding rate is applied on every fee-accruing transaction, where the total change is simply the
// rate applied linearly since the last update. This implies that the compounding rate depends on the frequency
// of update transactions that have this modifier, and it never reaches the ideal of continuous compounding.
// This approximate-compounding pattern is common in the Ethereum ecosystem because of the complexity of
// compounding data on-chain.
applyFundingRate();
_;
}
// Note: this modifier is intended to be used if the caller intends to _only_ pay regular fees.
modifier paysRegularFees {
payRegularFees();
_;
}
/**
* @notice Constructs the FundingRateApplier contract. Called by child contracts.
* @param _fundingRateIdentifier identifier that tracks the funding rate of this contract.
* @param _collateralAddress address of the collateral token.
* @param _finderAddress Finder used to discover financial-product-related contracts.
* @param _configStoreAddress address of the remote configuration store managed by an external owner.
* @param _tokenScaling initial scaling to apply to the token value (i.e. scales the tracking index).
* @param _timerAddress address of the timer contract in test envs, otherwise 0x0.
*/
constructor(
bytes32 _fundingRateIdentifier,
address _collateralAddress,
address _finderAddress,
address _configStoreAddress,
FixedPoint.Unsigned memory _tokenScaling,
address _timerAddress
) FeePayer(_collateralAddress, _finderAddress, _timerAddress) EmergencyShutdownable() {
uint256 currentTime = getCurrentTime();
fundingRate.updateTime = currentTime;
fundingRate.applicationTime = currentTime;
// Seed the cumulative multiplier with the token scaling, from which it will be scaled as funding rates are
// applied over time.
fundingRate.cumulativeMultiplier = _tokenScaling;
fundingRate.identifier = _fundingRateIdentifier;
configStore = ConfigStoreInterface(_configStoreAddress);
}
/**
* @notice This method takes 3 distinct actions:
* 1. Pays out regular fees.
* 2. If possible, resolves the outstanding funding rate proposal, pulling the result in and paying out the rewards.
* 3. Applies the prevailing funding rate over the most recent period.
*/
function applyFundingRate() public paysRegularFees() nonReentrant() {
_applyEffectiveFundingRate();
}
/**
* @notice Proposes a new funding rate. Proposer receives a reward if correct.
* @param rate funding rate being proposed.
* @param timestamp time at which the funding rate was computed.
*/
function proposeFundingRate(FixedPoint.Signed memory rate, uint256 timestamp)
external
fees()
nonReentrant()
returns (FixedPoint.Unsigned memory totalBond)
{
require(fundingRate.proposalTime == 0, "Proposal in progress");
_validateFundingRate(rate);
// Timestamp must be after the last funding rate update time, within the last 30 minutes.
uint256 currentTime = getCurrentTime();
uint256 updateTime = fundingRate.updateTime;
require(
timestamp > updateTime && timestamp >= currentTime.sub(_getConfig().proposalTimePastLimit),
"Invalid proposal time"
);
// Set the proposal time in order to allow this contract to track this request.
fundingRate.proposalTime = timestamp;
OptimisticOracleInterface optimisticOracle = _getOptimisticOracle();
// Set up optimistic oracle.
bytes32 identifier = fundingRate.identifier;
bytes memory ancillaryData = _getAncillaryData();
// Note: requestPrice will revert if `timestamp` is less than the current block timestamp.
optimisticOracle.requestPrice(identifier, timestamp, ancillaryData, collateralCurrency, 0);
totalBond = FixedPoint.Unsigned(
optimisticOracle.setBond(
identifier,
timestamp,
ancillaryData,
_pfc().mul(_getConfig().proposerBondPercentage).rawValue
)
);
// Pull bond from caller and send to optimistic oracle.
if (totalBond.isGreaterThan(0)) {
collateralCurrency.safeTransferFrom(msg.sender, address(this), totalBond.rawValue);
collateralCurrency.safeIncreaseAllowance(address(optimisticOracle), totalBond.rawValue);
}
optimisticOracle.proposePriceFor(
msg.sender,
address(this),
identifier,
timestamp,
ancillaryData,
rate.rawValue
);
}
// Returns a token amount scaled by the current funding rate multiplier.
// Note: if the contract has paid fees since it was deployed, the raw value should be larger than the returned value.
function _getFundingRateAppliedTokenDebt(FixedPoint.Unsigned memory rawTokenDebt)
internal
view
returns (FixedPoint.Unsigned memory tokenDebt)
{
return rawTokenDebt.mul(fundingRate.cumulativeMultiplier);
}
function _getOptimisticOracle() internal view returns (OptimisticOracleInterface) {
return OptimisticOracleInterface(finder.getImplementationAddress(OracleInterfaces.OptimisticOracle));
}
function _getConfig() internal returns (ConfigStoreInterface.ConfigSettings memory) {
return configStore.updateAndGetCurrentConfig();
}
function _updateFundingRate() internal {
uint256 proposalTime = fundingRate.proposalTime;
// If there is no pending proposal then do nothing. Otherwise check to see if we can update the funding rate.
if (proposalTime != 0) {
// Attempt to update the funding rate.
OptimisticOracleInterface optimisticOracle = _getOptimisticOracle();
bytes32 identifier = fundingRate.identifier;
bytes memory ancillaryData = _getAncillaryData();
// Try to get the price from the optimistic oracle. This call will revert if the request has not resolved
// yet. If the request has not resolved yet, then we need to do additional checks to see if we should
// "forget" the pending proposal and allow new proposals to update the funding rate.
try optimisticOracle.settleAndGetPrice(identifier, proposalTime, ancillaryData) returns (int256 price) {
// If successful, determine if the funding rate state needs to be updated.
// If the request is more recent than the last update then we should update it.
uint256 lastUpdateTime = fundingRate.updateTime;
if (proposalTime >= lastUpdateTime) {
// Update funding rates
fundingRate.rate = FixedPoint.Signed(price);
fundingRate.updateTime = proposalTime;
// If there was no dispute, send a reward.
FixedPoint.Unsigned memory reward = FixedPoint.fromUnscaledUint(0);
OptimisticOracleInterface.Request memory request =
optimisticOracle.getRequest(address(this), identifier, proposalTime, ancillaryData);
if (request.disputer == address(0)) {
reward = _pfc().mul(_getConfig().rewardRatePerSecond).mul(proposalTime.sub(lastUpdateTime));
if (reward.isGreaterThan(0)) {
_adjustCumulativeFeeMultiplier(reward, _pfc());
collateralCurrency.safeTransfer(request.proposer, reward.rawValue);
}
}
// This event will only be emitted after the fundingRate struct's "updateTime" has been set
// to the latest proposal's proposalTime, indicating that the proposal has been published.
// So, it suffices to just emit fundingRate.updateTime here.
emit FundingRateUpdated(fundingRate.rate.rawValue, fundingRate.updateTime, reward.rawValue);
}
// Set proposal time to 0 since this proposal has now been resolved.
fundingRate.proposalTime = 0;
} catch {
// Stop tracking and allow other proposals to come in if:
// - The requester address is empty, indicating that the Oracle does not know about this funding rate
// request. This is possible if the Oracle is replaced while the price request is still pending.
// - The request has been disputed.
OptimisticOracleInterface.Request memory request =
optimisticOracle.getRequest(address(this), identifier, proposalTime, ancillaryData);
if (request.disputer != address(0) || request.proposer == address(0)) {
fundingRate.proposalTime = 0;
}
}
}
}
// Constraining the range of funding rates limits the PfC for any dishonest proposer and enhances the
// perpetual's security. For example, let's examine the case where the max and min funding rates
// are equivalent to +/- 500%/year. This 1000% funding rate range allows a 8.6% profit from corruption for a
// proposer who can deter honest proposers for 74 hours:
// 1000%/year / 360 days / 24 hours * 74 hours max attack time = ~ 8.6%.
// How would attack work? Imagine that the market is very volatile currently and that the "true" funding
// rate for the next 74 hours is -500%, but a dishonest proposer successfully proposes a rate of +500%
// (after a two hour liveness) and disputes honest proposers for the next 72 hours. This results in a funding
// rate error of 1000% for 74 hours, until the DVM can set the funding rate back to its correct value.
function _validateFundingRate(FixedPoint.Signed memory rate) internal {
require(
rate.isLessThanOrEqual(_getConfig().maxFundingRate) &&
rate.isGreaterThanOrEqual(_getConfig().minFundingRate)
);
}
// Fetches a funding rate from the Store, determines the period over which to compute an effective fee,
// and multiplies the current multiplier by the effective fee.
// A funding rate < 1 will reduce the multiplier, and a funding rate of > 1 will increase the multiplier.
// Note: 1 is set as the neutral rate because there are no negative numbers in FixedPoint, so we decide to treat
// values < 1 as "negative".
function _applyEffectiveFundingRate() internal {
// If contract is emergency shutdown, then the funding rate multiplier should no longer change.
if (emergencyShutdownTimestamp != 0) {
return;
}
uint256 currentTime = getCurrentTime();
uint256 paymentPeriod = currentTime.sub(fundingRate.applicationTime);
_updateFundingRate(); // Update the funding rate if there is a resolved proposal.
fundingRate.cumulativeMultiplier = _calculateEffectiveFundingRate(
paymentPeriod,
fundingRate.rate,
fundingRate.cumulativeMultiplier
);
fundingRate.applicationTime = currentTime;
}
function _calculateEffectiveFundingRate(
uint256 paymentPeriodSeconds,
FixedPoint.Signed memory fundingRatePerSecond,
FixedPoint.Unsigned memory currentCumulativeFundingRateMultiplier
) internal pure returns (FixedPoint.Unsigned memory newCumulativeFundingRateMultiplier) {
// Note: this method uses named return variables to save a little bytecode.
// The overall formula that this function is performing:
// newCumulativeFundingRateMultiplier =
// (1 + (fundingRatePerSecond * paymentPeriodSeconds)) * currentCumulativeFundingRateMultiplier.
FixedPoint.Signed memory ONE = FixedPoint.fromUnscaledInt(1);
// Multiply the per-second rate over the number of seconds that have elapsed to get the period rate.
FixedPoint.Signed memory periodRate = fundingRatePerSecond.mul(SafeCast.toInt256(paymentPeriodSeconds));
// Add one to create the multiplier to scale the existing fee multiplier.
FixedPoint.Signed memory signedPeriodMultiplier = ONE.add(periodRate);
// Max with 0 to ensure the multiplier isn't negative, then cast to an Unsigned.
FixedPoint.Unsigned memory unsignedPeriodMultiplier =
FixedPoint.fromSigned(FixedPoint.max(signedPeriodMultiplier, FixedPoint.fromUnscaledInt(0)));
// Multiply the existing cumulative funding rate multiplier by the computed period multiplier to get the new
// cumulative funding rate multiplier.
newCumulativeFundingRateMultiplier = currentCumulativeFundingRateMultiplier.mul(unsignedPeriodMultiplier);
}
function _getAncillaryData() internal view returns (bytes memory) {
// Note: when ancillary data is passed to the optimistic oracle, it should be tagged with the token address
// whose funding rate it's trying to get.
return abi.encodePacked(_getTokenAddress());
}
function _getTokenAddress() internal view virtual returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
* checks.
*
* Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
* easily result in undesired exploitation or bugs, since developers usually
* assume that overflows raise errors. `SafeCast` restores this intuition by
* reverting the transaction when such an operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*
* Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
* all math on `uint256` and `int256` and then downcasting.
*/
library SafeCast {
/**
* @dev Returns the downcasted uint128 from uint256, reverting on
* overflow (when the input is greater than largest uint128).
*
* Counterpart to Solidity's `uint128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*/
function toUint128(uint256 value) internal pure returns (uint128) {
require(value < 2**128, "SafeCast: value doesn\'t fit in 128 bits");
return uint128(value);
}
/**
* @dev Returns the downcasted uint64 from uint256, reverting on
* overflow (when the input is greater than largest uint64).
*
* Counterpart to Solidity's `uint64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*/
function toUint64(uint256 value) internal pure returns (uint64) {
require(value < 2**64, "SafeCast: value doesn\'t fit in 64 bits");
return uint64(value);
}
/**
* @dev Returns the downcasted uint32 from uint256, reverting on
* overflow (when the input is greater than largest uint32).
*
* Counterpart to Solidity's `uint32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*/
function toUint32(uint256 value) internal pure returns (uint32) {
require(value < 2**32, "SafeCast: value doesn\'t fit in 32 bits");
return uint32(value);
}
/**
* @dev Returns the downcasted uint16 from uint256, reverting on
* overflow (when the input is greater than largest uint16).
*
* Counterpart to Solidity's `uint16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*/
function toUint16(uint256 value) internal pure returns (uint16) {
require(value < 2**16, "SafeCast: value doesn\'t fit in 16 bits");
return uint16(value);
}
/**
* @dev Returns the downcasted uint8 from uint256, reverting on
* overflow (when the input is greater than largest uint8).
*
* Counterpart to Solidity's `uint8` operator.
*
* Requirements:
*
* - input must fit into 8 bits.
*/
function toUint8(uint256 value) internal pure returns (uint8) {
require(value < 2**8, "SafeCast: value doesn\'t fit in 8 bits");
return uint8(value);
}
/**
* @dev Converts a signed int256 into an unsigned uint256.
*
* Requirements:
*
* - input must be greater than or equal to 0.
*/
function toUint256(int256 value) internal pure returns (uint256) {
require(value >= 0, "SafeCast: value must be positive");
return uint256(value);
}
/**
* @dev Returns the downcasted int128 from int256, reverting on
* overflow (when the input is less than smallest int128 or
* greater than largest int128).
*
* Counterpart to Solidity's `int128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*
* _Available since v3.1._
*/
function toInt128(int256 value) internal pure returns (int128) {
require(value >= -2**127 && value < 2**127, "SafeCast: value doesn\'t fit in 128 bits");
return int128(value);
}
/**
* @dev Returns the downcasted int64 from int256, reverting on
* overflow (when the input is less than smallest int64 or
* greater than largest int64).
*
* Counterpart to Solidity's `int64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*
* _Available since v3.1._
*/
function toInt64(int256 value) internal pure returns (int64) {
require(value >= -2**63 && value < 2**63, "SafeCast: value doesn\'t fit in 64 bits");
return int64(value);
}
/**
* @dev Returns the downcasted int32 from int256, reverting on
* overflow (when the input is less than smallest int32 or
* greater than largest int32).
*
* Counterpart to Solidity's `int32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*
* _Available since v3.1._
*/
function toInt32(int256 value) internal pure returns (int32) {
require(value >= -2**31 && value < 2**31, "SafeCast: value doesn\'t fit in 32 bits");
return int32(value);
}
/**
* @dev Returns the downcasted int16 from int256, reverting on
* overflow (when the input is less than smallest int16 or
* greater than largest int16).
*
* Counterpart to Solidity's `int16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*
* _Available since v3.1._
*/
function toInt16(int256 value) internal pure returns (int16) {
require(value >= -2**15 && value < 2**15, "SafeCast: value doesn\'t fit in 16 bits");
return int16(value);
}
/**
* @dev Returns the downcasted int8 from int256, reverting on
* overflow (when the input is less than smallest int8 or
* greater than largest int8).
*
* Counterpart to Solidity's `int8` operator.
*
* Requirements:
*
* - input must fit into 8 bits.
*
* _Available since v3.1._
*/
function toInt8(int256 value) internal pure returns (int8) {
require(value >= -2**7 && value < 2**7, "SafeCast: value doesn\'t fit in 8 bits");
return int8(value);
}
/**
* @dev Converts an unsigned uint256 into a signed int256.
*
* Requirements:
*
* - input must be less than or equal to maxInt256.
*/
function toInt256(uint256 value) internal pure returns (int256) {
require(value < 2**255, "SafeCast: value doesn't fit in an int256");
return int256(value);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
/**
* @title EmergencyShutdownable contract.
* @notice Any contract that inherits this contract will have an emergency shutdown timestamp state variable.
* This contract provides modifiers that can be used by children contracts to determine if the contract is
* in the shutdown state. The child contract is expected to implement the logic that happens
* once a shutdown occurs.
*/
abstract contract EmergencyShutdownable {
using SafeMath for uint256;
/****************************************
* EMERGENCY SHUTDOWN DATA STRUCTURES *
****************************************/
// Timestamp used in case of emergency shutdown. 0 if no shutdown has been triggered.
uint256 public emergencyShutdownTimestamp;
/****************************************
* MODIFIERS *
****************************************/
modifier notEmergencyShutdown() {
_notEmergencyShutdown();
_;
}
modifier isEmergencyShutdown() {
_isEmergencyShutdown();
_;
}
/****************************************
* EXTERNAL FUNCTIONS *
****************************************/
constructor() {
emergencyShutdownTimestamp = 0;
}
/****************************************
* INTERNAL FUNCTIONS *
****************************************/
function _notEmergencyShutdown() internal view {
// Note: removed require string to save bytecode.
require(emergencyShutdownTimestamp == 0);
}
function _isEmergencyShutdown() internal view {
// Note: removed require string to save bytecode.
require(emergencyShutdownTimestamp != 0);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../common/FundingRateApplier.sol";
import "../../common/implementation/FixedPoint.sol";
// Implements FundingRateApplier internal methods to enable unit testing.
contract FundingRateApplierTest is FundingRateApplier {
constructor(
bytes32 _fundingRateIdentifier,
address _collateralAddress,
address _finderAddress,
address _configStoreAddress,
FixedPoint.Unsigned memory _tokenScaling,
address _timerAddress
)
FundingRateApplier(
_fundingRateIdentifier,
_collateralAddress,
_finderAddress,
_configStoreAddress,
_tokenScaling,
_timerAddress
)
{}
function calculateEffectiveFundingRate(
uint256 paymentPeriodSeconds,
FixedPoint.Signed memory fundingRatePerSecond,
FixedPoint.Unsigned memory currentCumulativeFundingRateMultiplier
) public pure returns (FixedPoint.Unsigned memory) {
return
_calculateEffectiveFundingRate(
paymentPeriodSeconds,
fundingRatePerSecond,
currentCumulativeFundingRateMultiplier
);
}
// Required overrides.
function _pfc() internal view virtual override returns (FixedPoint.Unsigned memory currentPfc) {
return FixedPoint.Unsigned(collateralCurrency.balanceOf(address(this)));
}
function emergencyShutdown() external override {}
function remargin() external override {}
function _getTokenAddress() internal view override returns (address) {
return address(collateralCurrency);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/interfaces/ExpandedIERC20.sol";
import "../../common/interfaces/IERC20Standard.sol";
import "../../oracle/implementation/ContractCreator.sol";
import "../../common/implementation/Testable.sol";
import "../../common/implementation/AddressWhitelist.sol";
import "../../common/implementation/Lockable.sol";
import "../common/TokenFactory.sol";
import "../common/SyntheticToken.sol";
import "./ExpiringMultiPartyLib.sol";
/**
* @title Expiring Multi Party Contract creator.
* @notice Factory contract to create and register new instances of expiring multiparty contracts.
* Responsible for constraining the parameters used to construct a new EMP. This creator contains a number of constraints
* that are applied to newly created expiring multi party contract. These constraints can evolve over time and are
* initially constrained to conservative values in this first iteration. Technically there is nothing in the
* ExpiringMultiParty contract requiring these constraints. However, because `createExpiringMultiParty()` is intended
* to be the only way to create valid financial contracts that are registered with the DVM (via _registerContract),
we can enforce deployment configurations here.
*/
contract ExpiringMultiPartyCreator is ContractCreator, Testable, Lockable {
using FixedPoint for FixedPoint.Unsigned;
/****************************************
* EMP CREATOR DATA STRUCTURES *
****************************************/
struct Params {
uint256 expirationTimestamp;
address collateralAddress;
bytes32 priceFeedIdentifier;
string syntheticName;
string syntheticSymbol;
FixedPoint.Unsigned collateralRequirement;
FixedPoint.Unsigned disputeBondPercentage;
FixedPoint.Unsigned sponsorDisputeRewardPercentage;
FixedPoint.Unsigned disputerDisputeRewardPercentage;
FixedPoint.Unsigned minSponsorTokens;
uint256 withdrawalLiveness;
uint256 liquidationLiveness;
address financialProductLibraryAddress;
}
// Address of TokenFactory used to create a new synthetic token.
address public tokenFactoryAddress;
event CreatedExpiringMultiParty(address indexed expiringMultiPartyAddress, address indexed deployerAddress);
/**
* @notice Constructs the ExpiringMultiPartyCreator contract.
* @param _finderAddress UMA protocol Finder used to discover other protocol contracts.
* @param _tokenFactoryAddress ERC20 token factory used to deploy synthetic token instances.
* @param _timerAddress Contract that stores the current time in a testing environment.
*/
constructor(
address _finderAddress,
address _tokenFactoryAddress,
address _timerAddress
) ContractCreator(_finderAddress) Testable(_timerAddress) nonReentrant() {
tokenFactoryAddress = _tokenFactoryAddress;
}
/**
* @notice Creates an instance of expiring multi party and registers it within the registry.
* @param params is a `ConstructorParams` object from ExpiringMultiParty.
* @return address of the deployed ExpiringMultiParty contract.
*/
function createExpiringMultiParty(Params memory params) public nonReentrant() returns (address) {
// Create a new synthetic token using the params.
require(bytes(params.syntheticName).length != 0, "Missing synthetic name");
require(bytes(params.syntheticSymbol).length != 0, "Missing synthetic symbol");
TokenFactory tf = TokenFactory(tokenFactoryAddress);
// If the collateral token does not have a `decimals()` method, then a default precision of 18 will be
// applied to the newly created synthetic token.
uint8 syntheticDecimals = _getSyntheticDecimals(params.collateralAddress);
ExpandedIERC20 tokenCurrency = tf.createToken(params.syntheticName, params.syntheticSymbol, syntheticDecimals);
address derivative = ExpiringMultiPartyLib.deploy(_convertParams(params, tokenCurrency));
// Give permissions to new derivative contract and then hand over ownership.
tokenCurrency.addMinter(derivative);
tokenCurrency.addBurner(derivative);
tokenCurrency.resetOwner(derivative);
_registerContract(new address[](0), derivative);
emit CreatedExpiringMultiParty(derivative, msg.sender);
return derivative;
}
/****************************************
* PRIVATE FUNCTIONS *
****************************************/
// Converts createExpiringMultiParty params to ExpiringMultiParty constructor params.
function _convertParams(Params memory params, ExpandedIERC20 newTokenCurrency)
private
view
returns (ExpiringMultiParty.ConstructorParams memory constructorParams)
{
// Known from creator deployment.
constructorParams.finderAddress = finderAddress;
constructorParams.timerAddress = timerAddress;
// Enforce configuration constraints.
require(params.withdrawalLiveness != 0, "Withdrawal liveness cannot be 0");
require(params.liquidationLiveness != 0, "Liquidation liveness cannot be 0");
require(params.expirationTimestamp > block.timestamp, "Invalid expiration time");
_requireWhitelistedCollateral(params.collateralAddress);
// We don't want EMP deployers to be able to intentionally or unintentionally set
// liveness periods that could induce arithmetic overflow, but we also don't want
// to be opinionated about what livenesses are "correct", so we will somewhat
// arbitrarily set the liveness upper bound to 100 years (5200 weeks). In practice, liveness
// periods even greater than a few days would make the EMP unusable for most users.
require(params.withdrawalLiveness < 5200 weeks, "Withdrawal liveness too large");
require(params.liquidationLiveness < 5200 weeks, "Liquidation liveness too large");
// Input from function call.
constructorParams.tokenAddress = address(newTokenCurrency);
constructorParams.expirationTimestamp = params.expirationTimestamp;
constructorParams.collateralAddress = params.collateralAddress;
constructorParams.priceFeedIdentifier = params.priceFeedIdentifier;
constructorParams.collateralRequirement = params.collateralRequirement;
constructorParams.disputeBondPercentage = params.disputeBondPercentage;
constructorParams.sponsorDisputeRewardPercentage = params.sponsorDisputeRewardPercentage;
constructorParams.disputerDisputeRewardPercentage = params.disputerDisputeRewardPercentage;
constructorParams.minSponsorTokens = params.minSponsorTokens;
constructorParams.withdrawalLiveness = params.withdrawalLiveness;
constructorParams.liquidationLiveness = params.liquidationLiveness;
constructorParams.financialProductLibraryAddress = params.financialProductLibraryAddress;
}
// IERC20Standard.decimals() will revert if the collateral contract has not implemented the decimals() method,
// which is possible since the method is only an OPTIONAL method in the ERC20 standard:
// https://eips.ethereum.org/EIPS/eip-20#methods.
function _getSyntheticDecimals(address _collateralAddress) public view returns (uint8 decimals) {
try IERC20Standard(_collateralAddress).decimals() returns (uint8 _decimals) {
return _decimals;
} catch {
return 18;
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "./ExpiringMultiParty.sol";
/**
* @title Provides convenient Expiring Multi Party contract utilities.
* @dev Using this library to deploy EMP's allows calling contracts to avoid importing the full EMP bytecode.
*/
library ExpiringMultiPartyLib {
/**
* @notice Returns address of new EMP deployed with given `params` configuration.
* @dev Caller will need to register new EMP with the Registry to begin requesting prices. Caller is also
* responsible for enforcing constraints on `params`.
* @param params is a `ConstructorParams` object from ExpiringMultiParty.
* @return address of the deployed ExpiringMultiParty contract
*/
function deploy(ExpiringMultiParty.ConstructorParams memory params) public returns (address) {
ExpiringMultiParty derivative = new ExpiringMultiParty(params);
return address(derivative);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "./Liquidatable.sol";
/**
* @title Expiring Multi Party.
* @notice Convenient wrapper for Liquidatable.
*/
contract ExpiringMultiParty is Liquidatable {
/**
* @notice Constructs the ExpiringMultiParty contract.
* @param params struct to define input parameters for construction of Liquidatable. Some params
* are fed directly into the PricelessPositionManager's constructor within the inheritance tree.
*/
constructor(ConstructorParams memory params)
Liquidatable(params)
// Note: since there is no logic here, there is no need to add a re-entrancy guard.
{
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "./PricelessPositionManager.sol";
import "../../common/implementation/FixedPoint.sol";
/**
* @title Liquidatable
* @notice Adds logic to a position-managing contract that enables callers to liquidate an undercollateralized position.
* @dev The liquidation has a liveness period before expiring successfully, during which someone can "dispute" the
* liquidation, which sends a price request to the relevant Oracle to settle the final collateralization ratio based on
* a DVM price. The contract enforces dispute rewards in order to incentivize disputers to correctly dispute false
* liquidations and compensate position sponsors who had their position incorrectly liquidated. Importantly, a
* prospective disputer must deposit a dispute bond that they can lose in the case of an unsuccessful dispute.
* NOTE: this contract does _not_ work with ERC777 collateral currencies or any others that call into the receiver on
* transfer(). Using an ERC777 token would allow a user to maliciously grief other participants (while also losing
* money themselves).
*/
contract Liquidatable is PricelessPositionManager {
using FixedPoint for FixedPoint.Unsigned;
using SafeMath for uint256;
using SafeERC20 for IERC20;
using SafeERC20 for ExpandedIERC20;
using Address for address;
/****************************************
* LIQUIDATION DATA STRUCTURES *
****************************************/
// Because of the check in withdrawable(), the order of these enum values should not change.
enum Status { Uninitialized, NotDisputed, Disputed, DisputeSucceeded, DisputeFailed }
struct LiquidationData {
// Following variables set upon creation of liquidation:
address sponsor; // Address of the liquidated position's sponsor
address liquidator; // Address who created this liquidation
Status state; // Liquidated (and expired or not), Pending a Dispute, or Dispute has resolved
uint256 liquidationTime; // Time when liquidation is initiated, needed to get price from Oracle
// Following variables determined by the position that is being liquidated:
FixedPoint.Unsigned tokensOutstanding; // Synthetic tokens required to be burned by liquidator to initiate dispute
FixedPoint.Unsigned lockedCollateral; // Collateral locked by contract and released upon expiry or post-dispute
// Amount of collateral being liquidated, which could be different from
// lockedCollateral if there were pending withdrawals at the time of liquidation
FixedPoint.Unsigned liquidatedCollateral;
// Unit value (starts at 1) that is used to track the fees per unit of collateral over the course of the liquidation.
FixedPoint.Unsigned rawUnitCollateral;
// Following variable set upon initiation of a dispute:
address disputer; // Person who is disputing a liquidation
// Following variable set upon a resolution of a dispute:
FixedPoint.Unsigned settlementPrice; // Final price as determined by an Oracle following a dispute
FixedPoint.Unsigned finalFee;
}
// Define the contract's constructor parameters as a struct to enable more variables to be specified.
// This is required to enable more params, over and above Solidity's limits.
struct ConstructorParams {
// Params for PricelessPositionManager only.
uint256 expirationTimestamp;
uint256 withdrawalLiveness;
address collateralAddress;
address tokenAddress;
address finderAddress;
address timerAddress;
address financialProductLibraryAddress;
bytes32 priceFeedIdentifier;
FixedPoint.Unsigned minSponsorTokens;
// Params specifically for Liquidatable.
uint256 liquidationLiveness;
FixedPoint.Unsigned collateralRequirement;
FixedPoint.Unsigned disputeBondPercentage;
FixedPoint.Unsigned sponsorDisputeRewardPercentage;
FixedPoint.Unsigned disputerDisputeRewardPercentage;
}
// This struct is used in the `withdrawLiquidation` method that disperses liquidation and dispute rewards.
// `payToX` stores the total collateral to withdraw from the contract to pay X. This value might differ
// from `paidToX` due to precision loss between accounting for the `rawCollateral` versus the
// fee-adjusted collateral. These variables are stored within a struct to avoid the stack too deep error.
struct RewardsData {
FixedPoint.Unsigned payToSponsor;
FixedPoint.Unsigned payToLiquidator;
FixedPoint.Unsigned payToDisputer;
FixedPoint.Unsigned paidToSponsor;
FixedPoint.Unsigned paidToLiquidator;
FixedPoint.Unsigned paidToDisputer;
}
// Liquidations are unique by ID per sponsor
mapping(address => LiquidationData[]) public liquidations;
// Total collateral in liquidation.
FixedPoint.Unsigned public rawLiquidationCollateral;
// Immutable contract parameters:
// Amount of time for pending liquidation before expiry.
// !!Note: The lower the liquidation liveness value, the more risk incurred by sponsors.
// Extremely low liveness values increase the chance that opportunistic invalid liquidations
// expire without dispute, thereby decreasing the usability for sponsors and increasing the risk
// for the contract as a whole. An insolvent contract is extremely risky for any sponsor or synthetic
// token holder for the contract.
uint256 public liquidationLiveness;
// Required collateral:TRV ratio for a position to be considered sufficiently collateralized.
FixedPoint.Unsigned public collateralRequirement;
// Percent of a Liquidation/Position's lockedCollateral to be deposited by a potential disputer
// Represented as a multiplier, for example 1.5e18 = "150%" and 0.05e18 = "5%"
FixedPoint.Unsigned public disputeBondPercentage;
// Percent of oraclePrice paid to sponsor in the Disputed state (i.e. following a successful dispute)
// Represented as a multiplier, see above.
FixedPoint.Unsigned public sponsorDisputeRewardPercentage;
// Percent of oraclePrice paid to disputer in the Disputed state (i.e. following a successful dispute)
// Represented as a multiplier, see above.
FixedPoint.Unsigned public disputerDisputeRewardPercentage;
/****************************************
* EVENTS *
****************************************/
event LiquidationCreated(
address indexed sponsor,
address indexed liquidator,
uint256 indexed liquidationId,
uint256 tokensOutstanding,
uint256 lockedCollateral,
uint256 liquidatedCollateral,
uint256 liquidationTime
);
event LiquidationDisputed(
address indexed sponsor,
address indexed liquidator,
address indexed disputer,
uint256 liquidationId,
uint256 disputeBondAmount
);
event DisputeSettled(
address indexed caller,
address indexed sponsor,
address indexed liquidator,
address disputer,
uint256 liquidationId,
bool disputeSucceeded
);
event LiquidationWithdrawn(
address indexed caller,
uint256 paidToLiquidator,
uint256 paidToDisputer,
uint256 paidToSponsor,
Status indexed liquidationStatus,
uint256 settlementPrice
);
/****************************************
* MODIFIERS *
****************************************/
modifier disputable(uint256 liquidationId, address sponsor) {
_disputable(liquidationId, sponsor);
_;
}
modifier withdrawable(uint256 liquidationId, address sponsor) {
_withdrawable(liquidationId, sponsor);
_;
}
/**
* @notice Constructs the liquidatable contract.
* @param params struct to define input parameters for construction of Liquidatable. Some params
* are fed directly into the PricelessPositionManager's constructor within the inheritance tree.
*/
constructor(ConstructorParams memory params)
PricelessPositionManager(
params.expirationTimestamp,
params.withdrawalLiveness,
params.collateralAddress,
params.tokenAddress,
params.finderAddress,
params.priceFeedIdentifier,
params.minSponsorTokens,
params.timerAddress,
params.financialProductLibraryAddress
)
nonReentrant()
{
require(params.collateralRequirement.isGreaterThan(1));
require(params.sponsorDisputeRewardPercentage.add(params.disputerDisputeRewardPercentage).isLessThan(1));
// Set liquidatable specific variables.
liquidationLiveness = params.liquidationLiveness;
collateralRequirement = params.collateralRequirement;
disputeBondPercentage = params.disputeBondPercentage;
sponsorDisputeRewardPercentage = params.sponsorDisputeRewardPercentage;
disputerDisputeRewardPercentage = params.disputerDisputeRewardPercentage;
}
/****************************************
* LIQUIDATION FUNCTIONS *
****************************************/
/**
* @notice Liquidates the sponsor's position if the caller has enough
* synthetic tokens to retire the position's outstanding tokens. Liquidations above
* a minimum size also reset an ongoing "slow withdrawal"'s liveness.
* @dev This method generates an ID that will uniquely identify liquidation for the sponsor. This contract must be
* approved to spend at least `tokensLiquidated` of `tokenCurrency` and at least `finalFeeBond` of `collateralCurrency`.
* @dev This contract must have the Burner role for the `tokenCurrency`.
* @param sponsor address of the sponsor to liquidate.
* @param minCollateralPerToken abort the liquidation if the position's collateral per token is below this value.
* @param maxCollateralPerToken abort the liquidation if the position's collateral per token exceeds this value.
* @param maxTokensToLiquidate max number of tokens to liquidate.
* @param deadline abort the liquidation if the transaction is mined after this timestamp.
* @return liquidationId ID of the newly created liquidation.
* @return tokensLiquidated amount of synthetic tokens removed and liquidated from the `sponsor`'s position.
* @return finalFeeBond amount of collateral to be posted by liquidator and returned if not disputed successfully.
*/
function createLiquidation(
address sponsor,
FixedPoint.Unsigned calldata minCollateralPerToken,
FixedPoint.Unsigned calldata maxCollateralPerToken,
FixedPoint.Unsigned calldata maxTokensToLiquidate,
uint256 deadline
)
external
fees()
onlyPreExpiration()
nonReentrant()
returns (
uint256 liquidationId,
FixedPoint.Unsigned memory tokensLiquidated,
FixedPoint.Unsigned memory finalFeeBond
)
{
// Check that this transaction was mined pre-deadline.
require(getCurrentTime() <= deadline, "Mined after deadline");
// Retrieve Position data for sponsor
PositionData storage positionToLiquidate = _getPositionData(sponsor);
tokensLiquidated = FixedPoint.min(maxTokensToLiquidate, positionToLiquidate.tokensOutstanding);
require(tokensLiquidated.isGreaterThan(0));
// Starting values for the Position being liquidated. If withdrawal request amount is > position's collateral,
// then set this to 0, otherwise set it to (startCollateral - withdrawal request amount).
FixedPoint.Unsigned memory startCollateral = _getFeeAdjustedCollateral(positionToLiquidate.rawCollateral);
FixedPoint.Unsigned memory startCollateralNetOfWithdrawal = FixedPoint.fromUnscaledUint(0);
if (positionToLiquidate.withdrawalRequestAmount.isLessThanOrEqual(startCollateral)) {
startCollateralNetOfWithdrawal = startCollateral.sub(positionToLiquidate.withdrawalRequestAmount);
}
// Scoping to get rid of a stack too deep error.
{
FixedPoint.Unsigned memory startTokens = positionToLiquidate.tokensOutstanding;
// The Position's collateralization ratio must be between [minCollateralPerToken, maxCollateralPerToken].
// maxCollateralPerToken >= startCollateralNetOfWithdrawal / startTokens.
require(
maxCollateralPerToken.mul(startTokens).isGreaterThanOrEqual(startCollateralNetOfWithdrawal),
"CR is more than max liq. price"
);
// minCollateralPerToken >= startCollateralNetOfWithdrawal / startTokens.
require(
minCollateralPerToken.mul(startTokens).isLessThanOrEqual(startCollateralNetOfWithdrawal),
"CR is less than min liq. price"
);
}
// Compute final fee at time of liquidation.
finalFeeBond = _computeFinalFees();
// These will be populated within the scope below.
FixedPoint.Unsigned memory lockedCollateral;
FixedPoint.Unsigned memory liquidatedCollateral;
// Scoping to get rid of a stack too deep error.
{
FixedPoint.Unsigned memory ratio = tokensLiquidated.div(positionToLiquidate.tokensOutstanding);
// The actual amount of collateral that gets moved to the liquidation.
lockedCollateral = startCollateral.mul(ratio);
// For purposes of disputes, it's actually this liquidatedCollateral value that's used. This value is net of
// withdrawal requests.
liquidatedCollateral = startCollateralNetOfWithdrawal.mul(ratio);
// Part of the withdrawal request is also removed. Ideally:
// liquidatedCollateral + withdrawalAmountToRemove = lockedCollateral.
FixedPoint.Unsigned memory withdrawalAmountToRemove =
positionToLiquidate.withdrawalRequestAmount.mul(ratio);
_reduceSponsorPosition(sponsor, tokensLiquidated, lockedCollateral, withdrawalAmountToRemove);
}
// Add to the global liquidation collateral count.
_addCollateral(rawLiquidationCollateral, lockedCollateral.add(finalFeeBond));
// Construct liquidation object.
// Note: All dispute-related values are zeroed out until a dispute occurs. liquidationId is the index of the new
// LiquidationData that is pushed into the array, which is equal to the current length of the array pre-push.
liquidationId = liquidations[sponsor].length;
liquidations[sponsor].push(
LiquidationData({
sponsor: sponsor,
liquidator: msg.sender,
state: Status.NotDisputed,
liquidationTime: getCurrentTime(),
tokensOutstanding: tokensLiquidated,
lockedCollateral: lockedCollateral,
liquidatedCollateral: liquidatedCollateral,
rawUnitCollateral: _convertToRawCollateral(FixedPoint.fromUnscaledUint(1)),
disputer: address(0),
settlementPrice: FixedPoint.fromUnscaledUint(0),
finalFee: finalFeeBond
})
);
// If this liquidation is a subsequent liquidation on the position, and the liquidation size is larger than
// some "griefing threshold", then re-set the liveness. This enables a liquidation against a withdraw request to be
// "dragged out" if the position is very large and liquidators need time to gather funds. The griefing threshold
// is enforced so that liquidations for trivially small # of tokens cannot drag out an honest sponsor's slow withdrawal.
// We arbitrarily set the "griefing threshold" to `minSponsorTokens` because it is the only parameter
// denominated in token currency units and we can avoid adding another parameter.
FixedPoint.Unsigned memory griefingThreshold = minSponsorTokens;
if (
positionToLiquidate.withdrawalRequestPassTimestamp > 0 && // The position is undergoing a slow withdrawal.
positionToLiquidate.withdrawalRequestPassTimestamp > getCurrentTime() && // The slow withdrawal has not yet expired.
tokensLiquidated.isGreaterThanOrEqual(griefingThreshold) // The liquidated token count is above a "griefing threshold".
) {
positionToLiquidate.withdrawalRequestPassTimestamp = getCurrentTime().add(withdrawalLiveness);
}
emit LiquidationCreated(
sponsor,
msg.sender,
liquidationId,
tokensLiquidated.rawValue,
lockedCollateral.rawValue,
liquidatedCollateral.rawValue,
getCurrentTime()
);
// Destroy tokens
tokenCurrency.safeTransferFrom(msg.sender, address(this), tokensLiquidated.rawValue);
tokenCurrency.burn(tokensLiquidated.rawValue);
// Pull final fee from liquidator.
collateralCurrency.safeTransferFrom(msg.sender, address(this), finalFeeBond.rawValue);
}
/**
* @notice Disputes a liquidation, if the caller has enough collateral to post a dispute bond
* and pay a fixed final fee charged on each price request.
* @dev Can only dispute a liquidation before the liquidation expires and if there are no other pending disputes.
* This contract must be approved to spend at least the dispute bond amount of `collateralCurrency`. This dispute
* bond amount is calculated from `disputeBondPercentage` times the collateral in the liquidation.
* @param liquidationId of the disputed liquidation.
* @param sponsor the address of the sponsor whose liquidation is being disputed.
* @return totalPaid amount of collateral charged to disputer (i.e. final fee bond + dispute bond).
*/
function dispute(uint256 liquidationId, address sponsor)
external
disputable(liquidationId, sponsor)
fees()
nonReentrant()
returns (FixedPoint.Unsigned memory totalPaid)
{
LiquidationData storage disputedLiquidation = _getLiquidationData(sponsor, liquidationId);
// Multiply by the unit collateral so the dispute bond is a percentage of the locked collateral after fees.
FixedPoint.Unsigned memory disputeBondAmount =
disputedLiquidation.lockedCollateral.mul(disputeBondPercentage).mul(
_getFeeAdjustedCollateral(disputedLiquidation.rawUnitCollateral)
);
_addCollateral(rawLiquidationCollateral, disputeBondAmount);
// Request a price from DVM. Liquidation is pending dispute until DVM returns a price.
disputedLiquidation.state = Status.Disputed;
disputedLiquidation.disputer = msg.sender;
// Enqueue a request with the DVM.
_requestOraclePriceLiquidation(disputedLiquidation.liquidationTime);
emit LiquidationDisputed(
sponsor,
disputedLiquidation.liquidator,
msg.sender,
liquidationId,
disputeBondAmount.rawValue
);
totalPaid = disputeBondAmount.add(disputedLiquidation.finalFee);
// Pay the final fee for requesting price from the DVM.
_payFinalFees(msg.sender, disputedLiquidation.finalFee);
// Transfer the dispute bond amount from the caller to this contract.
collateralCurrency.safeTransferFrom(msg.sender, address(this), disputeBondAmount.rawValue);
}
/**
* @notice After a dispute has settled or after a non-disputed liquidation has expired,
* anyone can call this method to disperse payments to the sponsor, liquidator, and disdputer.
* @dev If the dispute SUCCEEDED: the sponsor, liquidator, and disputer are eligible for payment.
* If the dispute FAILED: only the liquidator can receive payment.
* This method will revert if rewards have already been dispersed.
* @param liquidationId uniquely identifies the sponsor's liquidation.
* @param sponsor address of the sponsor associated with the liquidation.
* @return data about rewards paid out.
*/
function withdrawLiquidation(uint256 liquidationId, address sponsor)
public
withdrawable(liquidationId, sponsor)
fees()
nonReentrant()
returns (RewardsData memory)
{
LiquidationData storage liquidation = _getLiquidationData(sponsor, liquidationId);
// Settles the liquidation if necessary. This call will revert if the price has not resolved yet.
_settle(liquidationId, sponsor);
// Calculate rewards as a function of the TRV.
// Note: all payouts are scaled by the unit collateral value so all payouts are charged the fees pro rata.
FixedPoint.Unsigned memory feeAttenuation = _getFeeAdjustedCollateral(liquidation.rawUnitCollateral);
FixedPoint.Unsigned memory settlementPrice = liquidation.settlementPrice;
FixedPoint.Unsigned memory tokenRedemptionValue =
liquidation.tokensOutstanding.mul(settlementPrice).mul(feeAttenuation);
FixedPoint.Unsigned memory collateral = liquidation.lockedCollateral.mul(feeAttenuation);
FixedPoint.Unsigned memory disputerDisputeReward = disputerDisputeRewardPercentage.mul(tokenRedemptionValue);
FixedPoint.Unsigned memory sponsorDisputeReward = sponsorDisputeRewardPercentage.mul(tokenRedemptionValue);
FixedPoint.Unsigned memory disputeBondAmount = collateral.mul(disputeBondPercentage);
FixedPoint.Unsigned memory finalFee = liquidation.finalFee.mul(feeAttenuation);
// There are three main outcome states: either the dispute succeeded, failed or was not updated.
// Based on the state, different parties of a liquidation receive different amounts.
// After assigning rewards based on the liquidation status, decrease the total collateral held in this contract
// by the amount to pay each party. The actual amounts withdrawn might differ if _removeCollateral causes
// precision loss.
RewardsData memory rewards;
if (liquidation.state == Status.DisputeSucceeded) {
// If the dispute is successful then all three users should receive rewards:
// Pay DISPUTER: disputer reward + dispute bond + returned final fee
rewards.payToDisputer = disputerDisputeReward.add(disputeBondAmount).add(finalFee);
// Pay SPONSOR: remaining collateral (collateral - TRV) + sponsor reward
rewards.payToSponsor = sponsorDisputeReward.add(collateral.sub(tokenRedemptionValue));
// Pay LIQUIDATOR: TRV - dispute reward - sponsor reward
// If TRV > Collateral, then subtract rewards from collateral
// NOTE: `payToLiquidator` should never be below zero since we enforce that
// (sponsorDisputePct+disputerDisputePct) <= 1 in the constructor when these params are set.
rewards.payToLiquidator = tokenRedemptionValue.sub(sponsorDisputeReward).sub(disputerDisputeReward);
// Transfer rewards and debit collateral
rewards.paidToLiquidator = _removeCollateral(rawLiquidationCollateral, rewards.payToLiquidator);
rewards.paidToSponsor = _removeCollateral(rawLiquidationCollateral, rewards.payToSponsor);
rewards.paidToDisputer = _removeCollateral(rawLiquidationCollateral, rewards.payToDisputer);
collateralCurrency.safeTransfer(liquidation.disputer, rewards.paidToDisputer.rawValue);
collateralCurrency.safeTransfer(liquidation.liquidator, rewards.paidToLiquidator.rawValue);
collateralCurrency.safeTransfer(liquidation.sponsor, rewards.paidToSponsor.rawValue);
// In the case of a failed dispute only the liquidator can withdraw.
} else if (liquidation.state == Status.DisputeFailed) {
// Pay LIQUIDATOR: collateral + dispute bond + returned final fee
rewards.payToLiquidator = collateral.add(disputeBondAmount).add(finalFee);
// Transfer rewards and debit collateral
rewards.paidToLiquidator = _removeCollateral(rawLiquidationCollateral, rewards.payToLiquidator);
collateralCurrency.safeTransfer(liquidation.liquidator, rewards.paidToLiquidator.rawValue);
// If the state is pre-dispute but time has passed liveness then there was no dispute. We represent this
// state as a dispute failed and the liquidator can withdraw.
} else if (liquidation.state == Status.NotDisputed) {
// Pay LIQUIDATOR: collateral + returned final fee
rewards.payToLiquidator = collateral.add(finalFee);
// Transfer rewards and debit collateral
rewards.paidToLiquidator = _removeCollateral(rawLiquidationCollateral, rewards.payToLiquidator);
collateralCurrency.safeTransfer(liquidation.liquidator, rewards.paidToLiquidator.rawValue);
}
emit LiquidationWithdrawn(
msg.sender,
rewards.paidToLiquidator.rawValue,
rewards.paidToDisputer.rawValue,
rewards.paidToSponsor.rawValue,
liquidation.state,
settlementPrice.rawValue
);
// Free up space after collateral is withdrawn by removing the liquidation object from the array.
delete liquidations[sponsor][liquidationId];
return rewards;
}
/**
* @notice Gets all liquidation information for a given sponsor address.
* @param sponsor address of the position sponsor.
* @return liquidationData array of all liquidation information for the given sponsor address.
*/
function getLiquidations(address sponsor)
external
view
nonReentrantView()
returns (LiquidationData[] memory liquidationData)
{
return liquidations[sponsor];
}
/**
* @notice Accessor method to calculate a transformed collateral requirement using the finanical product library
specified during contract deployment. If no library was provided then no modification to the collateral requirement is done.
* @param price input price used as an input to transform the collateral requirement.
* @return transformedCollateralRequirement collateral requirement with transformation applied to it.
* @dev This method should never revert.
*/
function transformCollateralRequirement(FixedPoint.Unsigned memory price)
public
view
nonReentrantView()
returns (FixedPoint.Unsigned memory)
{
return _transformCollateralRequirement(price);
}
/****************************************
* INTERNAL FUNCTIONS *
****************************************/
// This settles a liquidation if it is in the Disputed state. If not, it will immediately return.
// If the liquidation is in the Disputed state, but a price is not available, this will revert.
function _settle(uint256 liquidationId, address sponsor) internal {
LiquidationData storage liquidation = _getLiquidationData(sponsor, liquidationId);
// Settlement only happens when state == Disputed and will only happen once per liquidation.
// If this liquidation is not ready to be settled, this method should return immediately.
if (liquidation.state != Status.Disputed) {
return;
}
// Get the returned price from the oracle. If this has not yet resolved will revert.
liquidation.settlementPrice = _getOraclePriceLiquidation(liquidation.liquidationTime);
// Find the value of the tokens in the underlying collateral.
FixedPoint.Unsigned memory tokenRedemptionValue =
liquidation.tokensOutstanding.mul(liquidation.settlementPrice);
// The required collateral is the value of the tokens in underlying * required collateral ratio. The Transform
// Collateral requirement method applies a from the financial Product library to change the scaled the collateral
// requirement based on the settlement price. If no library was specified when deploying the emp then this makes no change.
FixedPoint.Unsigned memory requiredCollateral =
tokenRedemptionValue.mul(_transformCollateralRequirement(liquidation.settlementPrice));
// If the position has more than the required collateral it is solvent and the dispute is valid(liquidation is invalid)
// Note that this check uses the liquidatedCollateral not the lockedCollateral as this considers withdrawals.
bool disputeSucceeded = liquidation.liquidatedCollateral.isGreaterThanOrEqual(requiredCollateral);
liquidation.state = disputeSucceeded ? Status.DisputeSucceeded : Status.DisputeFailed;
emit DisputeSettled(
msg.sender,
sponsor,
liquidation.liquidator,
liquidation.disputer,
liquidationId,
disputeSucceeded
);
}
function _pfc() internal view override returns (FixedPoint.Unsigned memory) {
return super._pfc().add(_getFeeAdjustedCollateral(rawLiquidationCollateral));
}
function _getLiquidationData(address sponsor, uint256 liquidationId)
internal
view
returns (LiquidationData storage liquidation)
{
LiquidationData[] storage liquidationArray = liquidations[sponsor];
// Revert if the caller is attempting to access an invalid liquidation
// (one that has never been created or one has never been initialized).
require(
liquidationId < liquidationArray.length && liquidationArray[liquidationId].state != Status.Uninitialized,
"Invalid liquidation ID"
);
return liquidationArray[liquidationId];
}
function _getLiquidationExpiry(LiquidationData storage liquidation) internal view returns (uint256) {
return liquidation.liquidationTime.add(liquidationLiveness);
}
// These internal functions are supposed to act identically to modifiers, but re-used modifiers
// unnecessarily increase contract bytecode size.
// source: https://blog.polymath.network/solidity-tips-and-tricks-to-save-gas-and-reduce-bytecode-size-c44580b218e6
function _disputable(uint256 liquidationId, address sponsor) internal view {
LiquidationData storage liquidation = _getLiquidationData(sponsor, liquidationId);
require(
(getCurrentTime() < _getLiquidationExpiry(liquidation)) && (liquidation.state == Status.NotDisputed),
"Liquidation not disputable"
);
}
function _withdrawable(uint256 liquidationId, address sponsor) internal view {
LiquidationData storage liquidation = _getLiquidationData(sponsor, liquidationId);
Status state = liquidation.state;
// Must be disputed or the liquidation has passed expiry.
require(
(state > Status.NotDisputed) ||
((_getLiquidationExpiry(liquidation) <= getCurrentTime()) && (state == Status.NotDisputed)),
"Liquidation not withdrawable"
);
}
function _transformCollateralRequirement(FixedPoint.Unsigned memory price)
internal
view
returns (FixedPoint.Unsigned memory)
{
if (!address(financialProductLibrary).isContract()) return collateralRequirement;
try financialProductLibrary.transformCollateralRequirement(price, collateralRequirement) returns (
FixedPoint.Unsigned memory transformedCollateralRequirement
) {
return transformedCollateralRequirement;
} catch {
return collateralRequirement;
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../common/FeePayer.sol";
import "../../common/implementation/FixedPoint.sol";
import "../../oracle/interfaces/IdentifierWhitelistInterface.sol";
import "../../oracle/interfaces/OracleInterface.sol";
import "../../oracle/implementation/ContractCreator.sol";
/**
* @title Token Deposit Box
* @notice This is a minimal example of a financial template that depends on price requests from the DVM.
* This contract should be thought of as a "Deposit Box" into which the user deposits some ERC20 collateral.
* The main feature of this box is that the user can withdraw their ERC20 corresponding to a desired USD amount.
* When the user wants to make a withdrawal, a price request is enqueued with the UMA DVM.
* For simplicty, the user is constrained to have one outstanding withdrawal request at any given time.
* Regular fees are charged on the collateral in the deposit box throughout the lifetime of the deposit box,
* and final fees are charged on each price request.
*
* This example is intended to accompany a technical tutorial for how to integrate the DVM into a project.
* The main feature this demo serves to showcase is how to build a financial product on-chain that "pulls" price
* requests from the DVM on-demand, which is an implementation of the "priceless" oracle framework.
*
* The typical user flow would be:
* - User sets up a deposit box for the (wETH - USD) price-identifier. The "collateral currency" in this deposit
* box is therefore wETH.
* The user can subsequently make withdrawal requests for USD-denominated amounts of wETH.
* - User deposits 10 wETH into their deposit box.
* - User later requests to withdraw $100 USD of wETH.
* - DepositBox asks DVM for latest wETH/USD exchange rate.
* - DVM resolves the exchange rate at: 1 wETH is worth 200 USD.
* - DepositBox transfers 0.5 wETH to user.
*/
contract DepositBox is FeePayer, ContractCreator {
using SafeMath for uint256;
using FixedPoint for FixedPoint.Unsigned;
using SafeERC20 for IERC20;
// Represents a single caller's deposit box. All collateral is held by this contract.
struct DepositBoxData {
// Requested amount of collateral, denominated in quote asset of the price identifier.
// Example: If the price identifier is wETH-USD, and the `withdrawalRequestAmount = 100`, then
// this represents a withdrawal request for 100 USD worth of wETH.
FixedPoint.Unsigned withdrawalRequestAmount;
// Timestamp of the latest withdrawal request. A withdrawal request is pending if `requestPassTimestamp != 0`.
uint256 requestPassTimestamp;
// Raw collateral value. This value should never be accessed directly -- always use _getFeeAdjustedCollateral().
// To add or remove collateral, use _addCollateral() and _removeCollateral().
FixedPoint.Unsigned rawCollateral;
}
// Maps addresses to their deposit boxes. Each address can have only one position.
mapping(address => DepositBoxData) private depositBoxes;
// Unique identifier for DVM price feed ticker.
bytes32 private priceIdentifier;
// Similar to the rawCollateral in DepositBoxData, this value should not be used directly.
// _getFeeAdjustedCollateral(), _addCollateral() and _removeCollateral() must be used to access and adjust.
FixedPoint.Unsigned private rawTotalDepositBoxCollateral;
// This blocks every public state-modifying method until it flips to true, via the `initialize()` method.
bool private initialized;
/****************************************
* EVENTS *
****************************************/
event NewDepositBox(address indexed user);
event EndedDepositBox(address indexed user);
event Deposit(address indexed user, uint256 indexed collateralAmount);
event RequestWithdrawal(address indexed user, uint256 indexed collateralAmount, uint256 requestPassTimestamp);
event RequestWithdrawalExecuted(
address indexed user,
uint256 indexed collateralAmount,
uint256 exchangeRate,
uint256 requestPassTimestamp
);
event RequestWithdrawalCanceled(
address indexed user,
uint256 indexed collateralAmount,
uint256 requestPassTimestamp
);
/****************************************
* MODIFIERS *
****************************************/
modifier noPendingWithdrawal(address user) {
_depositBoxHasNoPendingWithdrawal(user);
_;
}
modifier isInitialized() {
_isInitialized();
_;
}
/****************************************
* PUBLIC FUNCTIONS *
****************************************/
/**
* @notice Construct the DepositBox.
* @param _collateralAddress ERC20 token to be deposited.
* @param _finderAddress UMA protocol Finder used to discover other protocol contracts.
* @param _priceIdentifier registered in the DVM, used to price the ERC20 deposited.
* The price identifier consists of a "base" asset and a "quote" asset. The "base" asset corresponds to the collateral ERC20
* currency deposited into this account, and it is denominated in the "quote" asset on withdrawals.
* An example price identifier would be "ETH-USD" which will resolve and return the USD price of ETH.
* @param _timerAddress Contract that stores the current time in a testing environment.
* Must be set to 0x0 for production environments that use live time.
*/
constructor(
address _collateralAddress,
address _finderAddress,
bytes32 _priceIdentifier,
address _timerAddress
) ContractCreator(_finderAddress) FeePayer(_collateralAddress, _finderAddress, _timerAddress) nonReentrant() {
require(_getIdentifierWhitelist().isIdentifierSupported(_priceIdentifier), "Unsupported price identifier");
priceIdentifier = _priceIdentifier;
}
/**
* @notice This should be called after construction of the DepositBox and handles registration with the Registry, which is required
* to make price requests in production environments.
* @dev This contract must hold the `ContractCreator` role with the Registry in order to register itself as a financial-template with the DVM.
* Note that `_registerContract` cannot be called from the constructor because this contract first needs to be given the `ContractCreator` role
* in order to register with the `Registry`. But, its address is not known until after deployment.
*/
function initialize() public nonReentrant() {
initialized = true;
_registerContract(new address[](0), address(this));
}
/**
* @notice Transfers `collateralAmount` of `collateralCurrency` into caller's deposit box.
* @dev This contract must be approved to spend at least `collateralAmount` of `collateralCurrency`.
* @param collateralAmount total amount of collateral tokens to be sent to the sponsor's position.
*/
function deposit(FixedPoint.Unsigned memory collateralAmount) public isInitialized() fees() nonReentrant() {
require(collateralAmount.isGreaterThan(0), "Invalid collateral amount");
DepositBoxData storage depositBoxData = depositBoxes[msg.sender];
if (_getFeeAdjustedCollateral(depositBoxData.rawCollateral).isEqual(0)) {
emit NewDepositBox(msg.sender);
}
// Increase the individual deposit box and global collateral balance by collateral amount.
_incrementCollateralBalances(depositBoxData, collateralAmount);
emit Deposit(msg.sender, collateralAmount.rawValue);
// Move collateral currency from sender to contract.
collateralCurrency.safeTransferFrom(msg.sender, address(this), collateralAmount.rawValue);
}
/**
* @notice Starts a withdrawal request that allows the sponsor to withdraw `denominatedCollateralAmount`
* from their position denominated in the quote asset of the price identifier, following a DVM price resolution.
* @dev The request will be pending for the duration of the DVM vote and can be cancelled at any time.
* Only one withdrawal request can exist for the user.
* @param denominatedCollateralAmount the quote-asset denominated amount of collateral requested to withdraw.
*/
function requestWithdrawal(FixedPoint.Unsigned memory denominatedCollateralAmount)
public
isInitialized()
noPendingWithdrawal(msg.sender)
nonReentrant()
{
DepositBoxData storage depositBoxData = depositBoxes[msg.sender];
require(denominatedCollateralAmount.isGreaterThan(0), "Invalid collateral amount");
// Update the position object for the user.
depositBoxData.withdrawalRequestAmount = denominatedCollateralAmount;
depositBoxData.requestPassTimestamp = getCurrentTime();
emit RequestWithdrawal(msg.sender, denominatedCollateralAmount.rawValue, depositBoxData.requestPassTimestamp);
// Every price request costs a fixed fee. Check that this user has enough deposited to cover the final fee.
FixedPoint.Unsigned memory finalFee = _computeFinalFees();
require(
_getFeeAdjustedCollateral(depositBoxData.rawCollateral).isGreaterThanOrEqual(finalFee),
"Cannot pay final fee"
);
_payFinalFees(address(this), finalFee);
// A price request is sent for the current timestamp.
_requestOraclePrice(depositBoxData.requestPassTimestamp);
}
/**
* @notice After a passed withdrawal request (i.e., by a call to `requestWithdrawal` and subsequent DVM price resolution),
* withdraws `depositBoxData.withdrawalRequestAmount` of collateral currency denominated in the quote asset.
* @dev Might not withdraw the full requested amount in order to account for precision loss or if the full requested
* amount exceeds the collateral in the position (due to paying fees).
* @return amountWithdrawn The actual amount of collateral withdrawn.
*/
function executeWithdrawal()
external
isInitialized()
fees()
nonReentrant()
returns (FixedPoint.Unsigned memory amountWithdrawn)
{
DepositBoxData storage depositBoxData = depositBoxes[msg.sender];
require(
depositBoxData.requestPassTimestamp != 0 && depositBoxData.requestPassTimestamp <= getCurrentTime(),
"Invalid withdraw request"
);
// Get the resolved price or revert.
FixedPoint.Unsigned memory exchangeRate = _getOraclePrice(depositBoxData.requestPassTimestamp);
// Calculate denomated amount of collateral based on resolved exchange rate.
// Example 1: User wants to withdraw $100 of ETH, exchange rate is $200/ETH, therefore user to receive 0.5 ETH.
// Example 2: User wants to withdraw $250 of ETH, exchange rate is $200/ETH, therefore user to receive 1.25 ETH.
FixedPoint.Unsigned memory denominatedAmountToWithdraw =
depositBoxData.withdrawalRequestAmount.div(exchangeRate);
// If withdrawal request amount is > collateral, then withdraw the full collateral amount and delete the deposit box data.
if (denominatedAmountToWithdraw.isGreaterThan(_getFeeAdjustedCollateral(depositBoxData.rawCollateral))) {
denominatedAmountToWithdraw = _getFeeAdjustedCollateral(depositBoxData.rawCollateral);
// Reset the position state as all the value has been removed after settlement.
emit EndedDepositBox(msg.sender);
}
// Decrease the individual deposit box and global collateral balance.
amountWithdrawn = _decrementCollateralBalances(depositBoxData, denominatedAmountToWithdraw);
emit RequestWithdrawalExecuted(
msg.sender,
amountWithdrawn.rawValue,
exchangeRate.rawValue,
depositBoxData.requestPassTimestamp
);
// Reset withdrawal request by setting withdrawal request timestamp to 0.
_resetWithdrawalRequest(depositBoxData);
// Transfer approved withdrawal amount from the contract to the caller.
collateralCurrency.safeTransfer(msg.sender, amountWithdrawn.rawValue);
}
/**
* @notice Cancels a pending withdrawal request.
*/
function cancelWithdrawal() external isInitialized() nonReentrant() {
DepositBoxData storage depositBoxData = depositBoxes[msg.sender];
require(depositBoxData.requestPassTimestamp != 0, "No pending withdrawal");
emit RequestWithdrawalCanceled(
msg.sender,
depositBoxData.withdrawalRequestAmount.rawValue,
depositBoxData.requestPassTimestamp
);
// Reset withdrawal request by setting withdrawal request timestamp to 0.
_resetWithdrawalRequest(depositBoxData);
}
/**
* @notice `emergencyShutdown` and `remargin` are required to be implemented by all financial contracts and exposed to the DVM, but
* because this is a minimal demo they will simply exit silently.
*/
function emergencyShutdown() external override isInitialized() nonReentrant() {
return;
}
/**
* @notice Same comment as `emergencyShutdown`. For the sake of simplicity, this will simply exit silently.
*/
function remargin() external override isInitialized() nonReentrant() {
return;
}
/**
* @notice Accessor method for a user's collateral.
* @dev This is necessary because the struct returned by the depositBoxes() method shows
* rawCollateral, which isn't a user-readable value.
* @param user address whose collateral amount is retrieved.
* @return the fee-adjusted collateral amount in the deposit box (i.e. available for withdrawal).
*/
function getCollateral(address user) external view nonReentrantView() returns (FixedPoint.Unsigned memory) {
return _getFeeAdjustedCollateral(depositBoxes[user].rawCollateral);
}
/**
* @notice Accessor method for the total collateral stored within the entire contract.
* @return the total fee-adjusted collateral amount in the contract (i.e. across all users).
*/
function totalDepositBoxCollateral() external view nonReentrantView() returns (FixedPoint.Unsigned memory) {
return _getFeeAdjustedCollateral(rawTotalDepositBoxCollateral);
}
/****************************************
* INTERNAL FUNCTIONS *
****************************************/
// Requests a price for `priceIdentifier` at `requestedTime` from the Oracle.
function _requestOraclePrice(uint256 requestedTime) internal {
OracleInterface oracle = _getOracle();
oracle.requestPrice(priceIdentifier, requestedTime);
}
// Ensure individual and global consistency when increasing collateral balances. Returns the change to the position.
function _incrementCollateralBalances(
DepositBoxData storage depositBoxData,
FixedPoint.Unsigned memory collateralAmount
) internal returns (FixedPoint.Unsigned memory) {
_addCollateral(depositBoxData.rawCollateral, collateralAmount);
return _addCollateral(rawTotalDepositBoxCollateral, collateralAmount);
}
// Ensure individual and global consistency when decrementing collateral balances. Returns the change to the
// position. We elect to return the amount that the global collateral is decreased by, rather than the individual
// position's collateral, because we need to maintain the invariant that the global collateral is always
// <= the collateral owned by the contract to avoid reverts on withdrawals. The amount returned = amount withdrawn.
function _decrementCollateralBalances(
DepositBoxData storage depositBoxData,
FixedPoint.Unsigned memory collateralAmount
) internal returns (FixedPoint.Unsigned memory) {
_removeCollateral(depositBoxData.rawCollateral, collateralAmount);
return _removeCollateral(rawTotalDepositBoxCollateral, collateralAmount);
}
function _resetWithdrawalRequest(DepositBoxData storage depositBoxData) internal {
depositBoxData.withdrawalRequestAmount = FixedPoint.fromUnscaledUint(0);
depositBoxData.requestPassTimestamp = 0;
}
function _depositBoxHasNoPendingWithdrawal(address user) internal view {
require(depositBoxes[user].requestPassTimestamp == 0, "Pending withdrawal");
}
function _isInitialized() internal view {
require(initialized, "Uninitialized contract");
}
function _getIdentifierWhitelist() internal view returns (IdentifierWhitelistInterface) {
return IdentifierWhitelistInterface(finder.getImplementationAddress(OracleInterfaces.IdentifierWhitelist));
}
function _getOracle() internal view returns (OracleInterface) {
return OracleInterface(finder.getImplementationAddress(OracleInterfaces.Oracle));
}
// Fetches a resolved Oracle price from the Oracle. Reverts if the Oracle hasn't resolved for this request.
function _getOraclePrice(uint256 requestedTime) internal view returns (FixedPoint.Unsigned memory) {
OracleInterface oracle = _getOracle();
require(oracle.hasPrice(priceIdentifier, requestedTime), "Unresolved oracle price");
int256 oraclePrice = oracle.getPrice(priceIdentifier, requestedTime);
// For simplicity we don't want to deal with negative prices.
if (oraclePrice < 0) {
oraclePrice = 0;
}
return FixedPoint.Unsigned(uint256(oraclePrice));
}
// `_pfc()` is inherited from FeePayer and must be implemented to return the available pool of collateral from
// which fees can be charged. For this contract, the available fee pool is simply all of the collateral locked up in the
// contract.
function _pfc() internal view virtual override returns (FixedPoint.Unsigned memory) {
return _getFeeAdjustedCollateral(rawTotalDepositBoxCollateral);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/FixedPoint.sol";
import "../../common/interfaces/ExpandedIERC20.sol";
import "./VotingToken.sol";
/**
* @title Migration contract for VotingTokens.
* @dev Handles migrating token holders from one token to the next.
*/
contract TokenMigrator {
using FixedPoint for FixedPoint.Unsigned;
/****************************************
* INTERNAL VARIABLES AND STORAGE *
****************************************/
VotingToken public oldToken;
ExpandedIERC20 public newToken;
uint256 public snapshotId;
FixedPoint.Unsigned public rate;
mapping(address => bool) public hasMigrated;
/**
* @notice Construct the TokenMigrator contract.
* @dev This function triggers the snapshot upon which all migrations will be based.
* @param _rate the number of old tokens it takes to generate one new token.
* @param _oldToken address of the token being migrated from.
* @param _newToken address of the token being migrated to.
*/
constructor(
FixedPoint.Unsigned memory _rate,
address _oldToken,
address _newToken
) {
// Prevents division by 0 in migrateTokens().
// Also it doesn’t make sense to have “0 old tokens equate to 1 new token”.
require(_rate.isGreaterThan(0), "Rate can't be 0");
rate = _rate;
newToken = ExpandedIERC20(_newToken);
oldToken = VotingToken(_oldToken);
snapshotId = oldToken.snapshot();
}
/**
* @notice Migrates the tokenHolder's old tokens to new tokens.
* @dev This function can only be called once per `tokenHolder`. Anyone can call this method
* on behalf of any other token holder since there is no disadvantage to receiving the tokens earlier.
* @param tokenHolder address of the token holder to migrate.
*/
function migrateTokens(address tokenHolder) external {
require(!hasMigrated[tokenHolder], "Already migrated tokens");
hasMigrated[tokenHolder] = true;
FixedPoint.Unsigned memory oldBalance = FixedPoint.Unsigned(oldToken.balanceOfAt(tokenHolder, snapshotId));
if (!oldBalance.isGreaterThan(0)) {
return;
}
FixedPoint.Unsigned memory newBalance = oldBalance.div(rate);
require(newToken.mint(tokenHolder, newBalance.rawValue), "Mint failed");
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
/**
* @title An implementation of ERC20 with the same interface as the Compound project's testnet tokens (mainly DAI)
* @dev This contract can be deployed or the interface can be used to communicate with Compound's ERC20 tokens. Note:
* this token should never be used to store real value since it allows permissionless minting.
*/
contract TestnetERC20 is ERC20 {
uint8 _decimals;
/**
* @notice Constructs the TestnetERC20.
* @param _name The name which describes the new token.
* @param _symbol The ticker abbreviation of the name. Ideally < 5 chars.
* @param _tokenDecimals The number of decimals to define token precision.
*/
constructor(
string memory _name,
string memory _symbol,
uint8 _tokenDecimals
) ERC20(_name, _symbol) {
_decimals = _tokenDecimals;
}
function decimals() public view virtual override(ERC20) returns (uint8) {
return _decimals;
}
// Sample token information.
/**
* @notice Mints value tokens to the owner address.
* @param ownerAddress the address to mint to.
* @param value the amount of tokens to mint.
*/
function allocateTo(address ownerAddress, uint256 value) external {
_mint(ownerAddress, value);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor () {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "./IDepositExecute.sol";
import "./IBridge.sol";
import "./IERCHandler.sol";
import "./IGenericHandler.sol";
/**
@title Facilitates deposits, creation and votiing of deposit proposals, and deposit executions.
@dev Copied directly from here: https://github.com/ChainSafe/chainbridge-solidity/releases/tag/v1.0.0 except for
one small change to the imported Pausable and SafeMath contracts. We replaced local implementations with
openzeppelin/contracts versions.
@author ChainSafe Systems.
*/
contract Bridge is Pausable, AccessControl {
using SafeMath for uint256;
uint8 public _chainID;
uint256 public _relayerThreshold;
uint256 public _totalRelayers;
uint256 public _totalProposals;
uint256 public _fee;
uint256 public _expiry;
enum Vote { No, Yes }
enum ProposalStatus { Inactive, Active, Passed, Executed, Cancelled }
struct Proposal {
bytes32 _resourceID;
bytes32 _dataHash;
address[] _yesVotes;
address[] _noVotes;
ProposalStatus _status;
uint256 _proposedBlock;
}
// destinationChainID => number of deposits
mapping(uint8 => uint64) public _depositCounts;
// resourceID => handler address
mapping(bytes32 => address) public _resourceIDToHandlerAddress;
// depositNonce => destinationChainID => bytes
mapping(uint64 => mapping(uint8 => bytes)) public _depositRecords;
// destinationChainID + depositNonce => dataHash => Proposal
mapping(uint72 => mapping(bytes32 => Proposal)) public _proposals;
// destinationChainID + depositNonce => dataHash => relayerAddress => bool
mapping(uint72 => mapping(bytes32 => mapping(address => bool))) public _hasVotedOnProposal;
event RelayerThresholdChanged(uint256 indexed newThreshold);
event RelayerAdded(address indexed relayer);
event RelayerRemoved(address indexed relayer);
event Deposit(uint8 indexed destinationChainID, bytes32 indexed resourceID, uint64 indexed depositNonce);
event ProposalEvent(
uint8 indexed originChainID,
uint64 indexed depositNonce,
ProposalStatus indexed status,
bytes32 resourceID,
bytes32 dataHash
);
event ProposalVote(
uint8 indexed originChainID,
uint64 indexed depositNonce,
ProposalStatus indexed status,
bytes32 resourceID
);
bytes32 public constant RELAYER_ROLE = keccak256("RELAYER_ROLE");
modifier onlyAdmin() {
_onlyAdmin();
_;
}
modifier onlyAdminOrRelayer() {
_onlyAdminOrRelayer();
_;
}
modifier onlyRelayers() {
_onlyRelayers();
_;
}
function _onlyAdminOrRelayer() private view {
require(
hasRole(DEFAULT_ADMIN_ROLE, msg.sender) || hasRole(RELAYER_ROLE, msg.sender),
"sender is not relayer or admin"
);
}
function _onlyAdmin() private view {
require(hasRole(DEFAULT_ADMIN_ROLE, msg.sender), "sender doesn't have admin role");
}
function _onlyRelayers() private view {
require(hasRole(RELAYER_ROLE, msg.sender), "sender doesn't have relayer role");
}
/**
@notice Initializes Bridge, creates and grants {msg.sender} the admin role,
creates and grants {initialRelayers} the relayer role.
@param chainID ID of chain the Bridge contract exists on.
@param initialRelayers Addresses that should be initially granted the relayer role.
@param initialRelayerThreshold Number of votes needed for a deposit proposal to be considered passed.
*/
constructor(
uint8 chainID,
address[] memory initialRelayers,
uint256 initialRelayerThreshold,
uint256 fee,
uint256 expiry
) {
_chainID = chainID;
_relayerThreshold = initialRelayerThreshold;
_fee = fee;
_expiry = expiry;
_setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
_setRoleAdmin(RELAYER_ROLE, DEFAULT_ADMIN_ROLE);
for (uint256 i; i < initialRelayers.length; i++) {
grantRole(RELAYER_ROLE, initialRelayers[i]);
_totalRelayers++;
}
}
/**
@notice Returns true if {relayer} has the relayer role.
@param relayer Address to check.
*/
function isRelayer(address relayer) external view returns (bool) {
return hasRole(RELAYER_ROLE, relayer);
}
/**
@notice Removes admin role from {msg.sender} and grants it to {newAdmin}.
@notice Only callable by an address that currently has the admin role.
@param newAdmin Address that admin role will be granted to.
*/
function renounceAdmin(address newAdmin) external onlyAdmin {
grantRole(DEFAULT_ADMIN_ROLE, newAdmin);
renounceRole(DEFAULT_ADMIN_ROLE, msg.sender);
}
/**
@notice Pauses deposits, proposal creation and voting, and deposit executions.
@notice Only callable by an address that currently has the admin role.
*/
function adminPauseTransfers() external onlyAdmin {
_pause();
}
/**
@notice Unpauses deposits, proposal creation and voting, and deposit executions.
@notice Only callable by an address that currently has the admin role.
*/
function adminUnpauseTransfers() external onlyAdmin {
_unpause();
}
/**
@notice Modifies the number of votes required for a proposal to be considered passed.
@notice Only callable by an address that currently has the admin role.
@param newThreshold Value {_relayerThreshold} will be changed to.
@notice Emits {RelayerThresholdChanged} event.
*/
function adminChangeRelayerThreshold(uint256 newThreshold) external onlyAdmin {
_relayerThreshold = newThreshold;
emit RelayerThresholdChanged(newThreshold);
}
/**
@notice Grants {relayerAddress} the relayer role and increases {_totalRelayer} count.
@notice Only callable by an address that currently has the admin role.
@param relayerAddress Address of relayer to be added.
@notice Emits {RelayerAdded} event.
*/
function adminAddRelayer(address relayerAddress) external onlyAdmin {
require(!hasRole(RELAYER_ROLE, relayerAddress), "addr already has relayer role!");
grantRole(RELAYER_ROLE, relayerAddress);
emit RelayerAdded(relayerAddress);
_totalRelayers++;
}
/**
@notice Removes relayer role for {relayerAddress} and decreases {_totalRelayer} count.
@notice Only callable by an address that currently has the admin role.
@param relayerAddress Address of relayer to be removed.
@notice Emits {RelayerRemoved} event.
*/
function adminRemoveRelayer(address relayerAddress) external onlyAdmin {
require(hasRole(RELAYER_ROLE, relayerAddress), "addr doesn't have relayer role!");
revokeRole(RELAYER_ROLE, relayerAddress);
emit RelayerRemoved(relayerAddress);
_totalRelayers--;
}
/**
@notice Sets a new resource for handler contracts that use the IERCHandler interface,
and maps the {handlerAddress} to {resourceID} in {_resourceIDToHandlerAddress}.
@notice Only callable by an address that currently has the admin role.
@param handlerAddress Address of handler resource will be set for.
@param resourceID ResourceID to be used when making deposits.
@param tokenAddress Address of contract to be called when a deposit is made and a deposited is executed.
*/
function adminSetResource(
address handlerAddress,
bytes32 resourceID,
address tokenAddress
) external onlyAdmin {
_resourceIDToHandlerAddress[resourceID] = handlerAddress;
IERCHandler handler = IERCHandler(handlerAddress);
handler.setResource(resourceID, tokenAddress);
}
/**
@notice Sets a new resource for handler contracts that use the IGenericHandler interface,
and maps the {handlerAddress} to {resourceID} in {_resourceIDToHandlerAddress}.
@notice Only callable by an address that currently has the admin role.
@param handlerAddress Address of handler resource will be set for.
@param resourceID ResourceID to be used when making deposits.
@param contractAddress Address of contract to be called when a deposit is made and a deposited is executed.
*/
function adminSetGenericResource(
address handlerAddress,
bytes32 resourceID,
address contractAddress,
bytes4 depositFunctionSig,
bytes4 executeFunctionSig
) external onlyAdmin {
_resourceIDToHandlerAddress[resourceID] = handlerAddress;
IGenericHandler handler = IGenericHandler(handlerAddress);
handler.setResource(resourceID, contractAddress, depositFunctionSig, executeFunctionSig);
}
/**
@notice Sets a resource as burnable for handler contracts that use the IERCHandler interface.
@notice Only callable by an address that currently has the admin role.
@param handlerAddress Address of handler resource will be set for.
@param tokenAddress Address of contract to be called when a deposit is made and a deposited is executed.
*/
function adminSetBurnable(address handlerAddress, address tokenAddress) external onlyAdmin {
IERCHandler handler = IERCHandler(handlerAddress);
handler.setBurnable(tokenAddress);
}
/**
@notice Returns a proposal.
@param originChainID Chain ID deposit originated from.
@param depositNonce ID of proposal generated by proposal's origin Bridge contract.
@param dataHash Hash of data to be provided when deposit proposal is executed.
@return Proposal which consists of:
- _dataHash Hash of data to be provided when deposit proposal is executed.
- _yesVotes Number of votes in favor of proposal.
- _noVotes Number of votes against proposal.
- _status Current status of proposal.
*/
function getProposal(
uint8 originChainID,
uint64 depositNonce,
bytes32 dataHash
) external view returns (Proposal memory) {
uint72 nonceAndID = (uint72(depositNonce) << 8) | uint72(originChainID);
return _proposals[nonceAndID][dataHash];
}
/**
@notice Changes deposit fee.
@notice Only callable by admin.
@param newFee Value {_fee} will be updated to.
*/
function adminChangeFee(uint256 newFee) external onlyAdmin {
require(_fee != newFee, "Current fee is equal to new fee");
_fee = newFee;
}
/**
@notice Used to manually withdraw funds from ERC safes.
@param handlerAddress Address of handler to withdraw from.
@param tokenAddress Address of token to withdraw.
@param recipient Address to withdraw tokens to.
@param amountOrTokenID Either the amount of ERC20 tokens or the ERC721 token ID to withdraw.
*/
function adminWithdraw(
address handlerAddress,
address tokenAddress,
address recipient,
uint256 amountOrTokenID
) external onlyAdmin {
IERCHandler handler = IERCHandler(handlerAddress);
handler.withdraw(tokenAddress, recipient, amountOrTokenID);
}
/**
@notice Initiates a transfer using a specified handler contract.
@notice Only callable when Bridge is not paused.
@param destinationChainID ID of chain deposit will be bridged to.
@param resourceID ResourceID used to find address of handler to be used for deposit.
@param data Additional data to be passed to specified handler.
@notice Emits {Deposit} event.
*/
function deposit(
uint8 destinationChainID,
bytes32 resourceID,
bytes calldata data
) external payable whenNotPaused {
require(msg.value == _fee, "Incorrect fee supplied");
address handler = _resourceIDToHandlerAddress[resourceID];
require(handler != address(0), "resourceID not mapped to handler");
uint64 depositNonce = ++_depositCounts[destinationChainID];
_depositRecords[depositNonce][destinationChainID] = data;
IDepositExecute depositHandler = IDepositExecute(handler);
depositHandler.deposit(resourceID, destinationChainID, depositNonce, msg.sender, data);
emit Deposit(destinationChainID, resourceID, depositNonce);
}
/**
@notice When called, {msg.sender} will be marked as voting in favor of proposal.
@notice Only callable by relayers when Bridge is not paused.
@param chainID ID of chain deposit originated from.
@param depositNonce ID of deposited generated by origin Bridge contract.
@param dataHash Hash of data provided when deposit was made.
@notice Proposal must not have already been passed or executed.
@notice {msg.sender} must not have already voted on proposal.
@notice Emits {ProposalEvent} event with status indicating the proposal status.
@notice Emits {ProposalVote} event.
*/
function voteProposal(
uint8 chainID,
uint64 depositNonce,
bytes32 resourceID,
bytes32 dataHash
) external onlyRelayers whenNotPaused {
uint72 nonceAndID = (uint72(depositNonce) << 8) | uint72(chainID);
Proposal storage proposal = _proposals[nonceAndID][dataHash];
require(_resourceIDToHandlerAddress[resourceID] != address(0), "no handler for resourceID");
require(uint256(proposal._status) <= 1, "proposal already passed/executed/cancelled");
require(!_hasVotedOnProposal[nonceAndID][dataHash][msg.sender], "relayer already voted");
if (uint256(proposal._status) == 0) {
++_totalProposals;
_proposals[nonceAndID][dataHash] = Proposal({
_resourceID: resourceID,
_dataHash: dataHash,
_yesVotes: new address[](1),
_noVotes: new address[](0),
_status: ProposalStatus.Active,
_proposedBlock: block.number
});
proposal._yesVotes[0] = msg.sender;
emit ProposalEvent(chainID, depositNonce, ProposalStatus.Active, resourceID, dataHash);
} else {
if (block.number.sub(proposal._proposedBlock) > _expiry) {
// if the number of blocks that has passed since this proposal was
// submitted exceeds the expiry threshold set, cancel the proposal
proposal._status = ProposalStatus.Cancelled;
emit ProposalEvent(chainID, depositNonce, ProposalStatus.Cancelled, resourceID, dataHash);
} else {
require(dataHash == proposal._dataHash, "datahash mismatch");
proposal._yesVotes.push(msg.sender);
}
}
if (proposal._status != ProposalStatus.Cancelled) {
_hasVotedOnProposal[nonceAndID][dataHash][msg.sender] = true;
emit ProposalVote(chainID, depositNonce, proposal._status, resourceID);
// If _depositThreshold is set to 1, then auto finalize
// or if _relayerThreshold has been exceeded
if (_relayerThreshold <= 1 || proposal._yesVotes.length >= _relayerThreshold) {
proposal._status = ProposalStatus.Passed;
emit ProposalEvent(chainID, depositNonce, ProposalStatus.Passed, resourceID, dataHash);
}
}
}
/**
@notice Executes a deposit proposal that is considered passed using a specified handler contract.
@notice Only callable by relayers when Bridge is not paused.
@param chainID ID of chain deposit originated from.
@param depositNonce ID of deposited generated by origin Bridge contract.
@param dataHash Hash of data originally provided when deposit was made.
@notice Proposal must be past expiry threshold.
@notice Emits {ProposalEvent} event with status {Cancelled}.
*/
function cancelProposal(
uint8 chainID,
uint64 depositNonce,
bytes32 dataHash
) public onlyAdminOrRelayer {
uint72 nonceAndID = (uint72(depositNonce) << 8) | uint72(chainID);
Proposal storage proposal = _proposals[nonceAndID][dataHash];
require(proposal._status != ProposalStatus.Cancelled, "Proposal already cancelled");
require(block.number.sub(proposal._proposedBlock) > _expiry, "Proposal not at expiry threshold");
proposal._status = ProposalStatus.Cancelled;
emit ProposalEvent(chainID, depositNonce, ProposalStatus.Cancelled, proposal._resourceID, proposal._dataHash);
}
/**
@notice Executes a deposit proposal that is considered passed using a specified handler contract.
@notice Only callable by relayers when Bridge is not paused.
@param chainID ID of chain deposit originated from.
@param resourceID ResourceID to be used when making deposits.
@param depositNonce ID of deposited generated by origin Bridge contract.
@param data Data originally provided when deposit was made.
@notice Proposal must have Passed status.
@notice Hash of {data} must equal proposal's {dataHash}.
@notice Emits {ProposalEvent} event with status {Executed}.
*/
function executeProposal(
uint8 chainID,
uint64 depositNonce,
bytes calldata data,
bytes32 resourceID
) external onlyRelayers whenNotPaused {
address handler = _resourceIDToHandlerAddress[resourceID];
uint72 nonceAndID = (uint72(depositNonce) << 8) | uint72(chainID);
bytes32 dataHash = keccak256(abi.encodePacked(handler, data));
Proposal storage proposal = _proposals[nonceAndID][dataHash];
require(proposal._status != ProposalStatus.Inactive, "proposal is not active");
require(proposal._status == ProposalStatus.Passed, "proposal already transferred");
require(dataHash == proposal._dataHash, "data doesn't match datahash");
proposal._status = ProposalStatus.Executed;
IDepositExecute depositHandler = IDepositExecute(_resourceIDToHandlerAddress[proposal._resourceID]);
depositHandler.executeProposal(proposal._resourceID, data);
emit ProposalEvent(chainID, depositNonce, proposal._status, proposal._resourceID, proposal._dataHash);
}
/**
@notice Transfers eth in the contract to the specified addresses. The parameters addrs and amounts are mapped 1-1.
This means that the address at index 0 for addrs will receive the amount (in WEI) from amounts at index 0.
@param addrs Array of addresses to transfer {amounts} to.
@param amounts Array of amonuts to transfer to {addrs}.
*/
function transferFunds(address payable[] calldata addrs, uint256[] calldata amounts) external onlyAdmin {
for (uint256 i = 0; i < addrs.length; i++) {
addrs[i].transfer(amounts[i]);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
function hasRole(bytes32 role, address account) external view returns (bool);
function getRoleAdmin(bytes32 role) external view returns (bytes32);
function grantRole(bytes32 role, address account) external;
function revokeRole(bytes32 role, address account) external;
function renounceRole(bytes32 role, address account) external;
}
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping (address => bool) members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId
|| super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if(!hasRole(role, account)) {
revert(string(abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)));
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, getRoleAdmin(role), adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
/**
@title Interface for handler contracts that support deposits and deposit executions.
@dev Copied directly from here: https://github.com/ChainSafe/chainbridge-solidity/releases/tag/v1.0.0.
@author ChainSafe Systems.
*/
interface IDepositExecute {
/**
@notice It is intended that deposit are made using the Bridge contract.
@param destinationChainID Chain ID deposit is expected to be bridged to.
@param depositNonce This value is generated as an ID by the Bridge contract.
@param depositer Address of account making the deposit in the Bridge contract.
@param data Consists of additional data needed for a specific deposit.
*/
function deposit(
bytes32 resourceID,
uint8 destinationChainID,
uint64 depositNonce,
address depositer,
bytes calldata data
) external;
/**
@notice It is intended that proposals are executed by the Bridge contract.
@param data Consists of additional data needed for a specific deposit execution.
*/
function executeProposal(bytes32 resourceID, bytes calldata data) external;
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
/**
@title Interface for Bridge contract.
@dev Copied directly from here: https://github.com/ChainSafe/chainbridge-solidity/releases/tag/v1.0.0 except for
the addition of `deposit()` so that this contract can be called from Sink and Source Oracle contracts.
@author ChainSafe Systems.
*/
interface IBridge {
/**
@notice Exposing getter for {_chainID} instead of forcing the use of call.
@return uint8 The {_chainID} that is currently set for the Bridge contract.
*/
function _chainID() external returns (uint8);
function deposit(
uint8 destinationChainID,
bytes32 resourceID,
bytes calldata data
) external;
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
/**
@title Interface to be used with handlers that support ERC20s and ERC721s.
@dev Copied directly from here: https://github.com/ChainSafe/chainbridge-solidity/releases/tag/v1.0.0.
@author ChainSafe Systems.
*/
interface IERCHandler {
/**
@notice Correlates {resourceID} with {contractAddress}.
@param resourceID ResourceID to be used when making deposits.
@param contractAddress Address of contract to be called when a deposit is made and a deposited is executed.
*/
function setResource(bytes32 resourceID, address contractAddress) external;
/**
@notice Marks {contractAddress} as mintable/burnable.
@param contractAddress Address of contract to be used when making or executing deposits.
*/
function setBurnable(address contractAddress) external;
/**
@notice Used to manually release funds from ERC safes.
@param tokenAddress Address of token contract to release.
@param recipient Address to release tokens to.
@param amountOrTokenID Either the amount of ERC20 tokens or the ERC721 token ID to release.
*/
function withdraw(
address tokenAddress,
address recipient,
uint256 amountOrTokenID
) external;
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
/**
@title Interface for handler that handles generic deposits and deposit executions.
@dev Copied directly from here: https://github.com/ChainSafe/chainbridge-solidity/releases/tag/v1.0.0.
@author ChainSafe Systems.
*/
interface IGenericHandler {
/**
@notice Correlates {resourceID} with {contractAddress}, {depositFunctionSig}, and {executeFunctionSig}.
@param resourceID ResourceID to be used when making deposits.
@param contractAddress Address of contract to be called when a deposit is made and a deposited is executed.
@param depositFunctionSig Function signature of method to be called in {contractAddress} when a deposit is made.
@param executeFunctionSig Function signature of method to be called in {contractAddress} when a deposit is executed.
*/
function setResource(
bytes32 resourceID,
address contractAddress,
bytes4 depositFunctionSig,
bytes4 executeFunctionSig
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant alphabet = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = alphabet[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "./IGenericHandler.sol";
/**
@title Handles generic deposits and deposit executions.
@author ChainSafe Systems.
@notice This contract is intended to be used with the Bridge contract. Copied directly from here:
https://github.com/ChainSafe/chainbridge-solidity/releases/tag/v1.0.0
*/
contract GenericHandler is IGenericHandler {
address public _bridgeAddress;
struct DepositRecord {
uint8 _destinationChainID;
address _depositer;
bytes32 _resourceID;
bytes _metaData;
}
// depositNonce => Deposit Record
mapping(uint8 => mapping(uint64 => DepositRecord)) public _depositRecords;
// resourceID => contract address
mapping(bytes32 => address) public _resourceIDToContractAddress;
// contract address => resourceID
mapping(address => bytes32) public _contractAddressToResourceID;
// contract address => deposit function signature
mapping(address => bytes4) public _contractAddressToDepositFunctionSignature;
// contract address => execute proposal function signature
mapping(address => bytes4) public _contractAddressToExecuteFunctionSignature;
// token contract address => is whitelisted
mapping(address => bool) public _contractWhitelist;
modifier onlyBridge() {
_onlyBridge();
_;
}
function _onlyBridge() private {
require(msg.sender == _bridgeAddress, "sender must be bridge contract");
}
/**
@param bridgeAddress Contract address of previously deployed Bridge.
@param initialResourceIDs Resource IDs used to identify a specific contract address.
These are the Resource IDs this contract will initially support.
@param initialContractAddresses These are the addresses the {initialResourceIDs} will point to, and are the contracts that will be
called to perform deposit and execution calls.
@param initialDepositFunctionSignatures These are the function signatures {initialContractAddresses} will point to,
and are the function that will be called when executing {deposit}
@param initialExecuteFunctionSignatures These are the function signatures {initialContractAddresses} will point to,
and are the function that will be called when executing {executeProposal}
@dev {initialResourceIDs}, {initialContractAddresses}, {initialDepositFunctionSignatures},
and {initialExecuteFunctionSignatures} must all have the same length. Also,
values must be ordered in the way that that index x of any mentioned array
must be intended for value x of any other array, e.g. {initialContractAddresses}[0]
is the intended address for {initialDepositFunctionSignatures}[0].
*/
constructor(
address bridgeAddress,
bytes32[] memory initialResourceIDs,
address[] memory initialContractAddresses,
bytes4[] memory initialDepositFunctionSignatures,
bytes4[] memory initialExecuteFunctionSignatures
) {
require(
initialResourceIDs.length == initialContractAddresses.length,
"initialResourceIDs and initialContractAddresses len mismatch"
);
require(
initialContractAddresses.length == initialDepositFunctionSignatures.length,
"provided contract addresses and function signatures len mismatch"
);
require(
initialDepositFunctionSignatures.length == initialExecuteFunctionSignatures.length,
"provided deposit and execute function signatures len mismatch"
);
_bridgeAddress = bridgeAddress;
for (uint256 i = 0; i < initialResourceIDs.length; i++) {
_setResource(
initialResourceIDs[i],
initialContractAddresses[i],
initialDepositFunctionSignatures[i],
initialExecuteFunctionSignatures[i]
);
}
}
/**
@param depositNonce This ID will have been generated by the Bridge contract.
@param destId ID of chain deposit will be bridged to.
@return DepositRecord which consists of:
- _destinationChainID ChainID deposited tokens are intended to end up on.
- _resourceID ResourceID used when {deposit} was executed.
- _depositer Address that initially called {deposit} in the Bridge contract.
- _metaData Data to be passed to method executed in corresponding {resourceID} contract.
*/
function getDepositRecord(uint64 depositNonce, uint8 destId) external view returns (DepositRecord memory) {
return _depositRecords[destId][depositNonce];
}
/**
@notice First verifies {_resourceIDToContractAddress}[{resourceID}] and
{_contractAddressToResourceID}[{contractAddress}] are not already set,
then sets {_resourceIDToContractAddress} with {contractAddress},
{_contractAddressToResourceID} with {resourceID},
{_contractAddressToDepositFunctionSignature} with {depositFunctionSig},
{_contractAddressToExecuteFunctionSignature} with {executeFunctionSig},
and {_contractWhitelist} to true for {contractAddress}.
@param resourceID ResourceID to be used when making deposits.
@param contractAddress Address of contract to be called when a deposit is made and a deposited is executed.
@param depositFunctionSig Function signature of method to be called in {contractAddress} when a deposit is made.
@param executeFunctionSig Function signature of method to be called in {contractAddress} when a deposit is executed.
*/
function setResource(
bytes32 resourceID,
address contractAddress,
bytes4 depositFunctionSig,
bytes4 executeFunctionSig
) external override onlyBridge {
_setResource(resourceID, contractAddress, depositFunctionSig, executeFunctionSig);
}
/**
@notice A deposit is initiatied by making a deposit in the Bridge contract.
@param destinationChainID Chain ID deposit is expected to be bridged to.
@param depositNonce This value is generated as an ID by the Bridge contract.
@param depositer Address of account making the deposit in the Bridge contract.
@param data Consists of: {resourceID}, {lenMetaData}, and {metaData} all padded to 32 bytes.
@notice Data passed into the function should be constructed as follows:
len(data) uint256 bytes 0 - 32
data bytes bytes 64 - END
@notice {contractAddress} is required to be whitelisted
@notice If {_contractAddressToDepositFunctionSignature}[{contractAddress}] is set,
{metaData} is expected to consist of needed function arguments.
*/
function deposit(
bytes32 resourceID,
uint8 destinationChainID,
uint64 depositNonce,
address depositer,
bytes calldata data
) external onlyBridge {
bytes32 lenMetadata;
bytes memory metadata;
assembly {
// Load length of metadata from data + 64
lenMetadata := calldataload(0xC4)
// Load free memory pointer
metadata := mload(0x40)
mstore(0x40, add(0x20, add(metadata, lenMetadata)))
// func sig (4) + destinationChainId (padded to 32) + depositNonce (32) + depositor (32) +
// bytes length (32) + resourceId (32) + length (32) = 0xC4
calldatacopy(
metadata, // copy to metadata
0xC4, // copy from calldata after metadata length declaration @0xC4
sub(calldatasize(), 0xC4) // copy size (calldatasize - (0xC4 + the space metaData takes up))
)
}
address contractAddress = _resourceIDToContractAddress[resourceID];
require(_contractWhitelist[contractAddress], "provided contractAddress is not whitelisted");
bytes4 sig = _contractAddressToDepositFunctionSignature[contractAddress];
if (sig != bytes4(0)) {
bytes memory callData = abi.encodePacked(sig, metadata);
(bool success, ) = contractAddress.call(callData);
require(success, "delegatecall to contractAddress failed");
}
_depositRecords[destinationChainID][depositNonce] = DepositRecord(
destinationChainID,
depositer,
resourceID,
metadata
);
}
/**
@notice Proposal execution should be initiated when a proposal is finalized in the Bridge contract.
@param data Consists of {resourceID}, {lenMetaData}, and {metaData}.
@notice Data passed into the function should be constructed as follows:
len(data) uint256 bytes 0 - 32
data bytes bytes 32 - END
@notice {contractAddress} is required to be whitelisted
@notice If {_contractAddressToExecuteFunctionSignature}[{contractAddress}] is set,
{metaData} is expected to consist of needed function arguments.
*/
function executeProposal(bytes32 resourceID, bytes calldata data) external onlyBridge {
bytes memory metaData;
assembly {
// metadata has variable length
// load free memory pointer to store metadata
metaData := mload(0x40)
// first 32 bytes of variable length in storage refer to length
let lenMeta := calldataload(0x64)
mstore(0x40, add(0x60, add(metaData, lenMeta)))
// in the calldata, metadata is stored @0x64 after accounting for function signature, and 2 previous params
calldatacopy(
metaData, // copy to metaData
0x64, // copy from calldata after data length declaration at 0x64
sub(calldatasize(), 0x64) // copy size (calldatasize - 0x64)
)
}
address contractAddress = _resourceIDToContractAddress[resourceID];
require(_contractWhitelist[contractAddress], "provided contractAddress is not whitelisted");
bytes4 sig = _contractAddressToExecuteFunctionSignature[contractAddress];
if (sig != bytes4(0)) {
bytes memory callData = abi.encodePacked(sig, metaData);
(bool success, ) = contractAddress.call(callData);
require(success, "delegatecall to contractAddress failed");
}
}
function _setResource(
bytes32 resourceID,
address contractAddress,
bytes4 depositFunctionSig,
bytes4 executeFunctionSig
) internal {
_resourceIDToContractAddress[resourceID] = contractAddress;
_contractAddressToResourceID[contractAddress] = resourceID;
_contractAddressToDepositFunctionSignature[contractAddress] = depositFunctionSig;
_contractAddressToExecuteFunctionSignature[contractAddress] = executeFunctionSig;
_contractWhitelist[contractAddress] = true;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../oracle/interfaces/FinderInterface.sol";
import "./IBridge.sol";
import "../oracle/implementation/Constants.sol";
/**
* @title Simple implementation of the OracleInterface used to communicate price request data cross-chain between
* EVM networks. Can be extended either into a "Source" or "Sink" oracle that specializes in making and resolving
* cross-chain price requests, respectivly. The "Source" Oracle is the originator or source of price resolution data
* and can only resolve prices already published by the DVM. The "Sink" Oracle receives the price resolution data
* from the Source Oracle and makes it available on non-Mainnet chains. The "Sink" Oracle can also be used to trigger
* price requests from the DVM on Mainnet.
*/
abstract contract BeaconOracle {
enum RequestState { NeverRequested, Requested, Resolved }
struct Price {
RequestState state;
int256 price;
}
// Chain ID for this Oracle.
uint8 public currentChainID;
// Mapping of encoded price requests {identifier, time, ancillaryData} to Price objects.
mapping(bytes32 => Price) internal prices;
// Finder to provide addresses for DVM system contracts.
FinderInterface public finder;
event PriceRequestAdded(
address indexed requester,
uint8 indexed chainID,
bytes32 indexed identifier,
uint256 time,
bytes ancillaryData
);
event PushedPrice(
address indexed pusher,
uint8 indexed chainID,
bytes32 indexed identifier,
uint256 time,
bytes ancillaryData,
int256 price
);
/**
* @notice Constructor.
* @param _finderAddress finder to use to get addresses of DVM contracts.
*/
constructor(address _finderAddress, uint8 _chainID) {
finder = FinderInterface(_finderAddress);
currentChainID = _chainID;
}
// We assume that there is only one GenericHandler for this network.
modifier onlyGenericHandlerContract() {
require(
msg.sender == finder.getImplementationAddress(OracleInterfaces.GenericHandler),
"Caller must be GenericHandler"
);
_;
}
/**
* @notice Enqueues a request (if a request isn't already present) for the given (identifier, time, ancillary data)
* pair. Will revert if request has been requested already.
*/
function _requestPrice(
uint8 chainID,
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) internal {
bytes32 priceRequestId = _encodePriceRequest(chainID, identifier, time, ancillaryData);
Price storage lookup = prices[priceRequestId];
if (lookup.state == RequestState.NeverRequested) {
// New query, change state to Requested:
lookup.state = RequestState.Requested;
emit PriceRequestAdded(msg.sender, chainID, identifier, time, ancillaryData);
}
}
/**
* @notice Publishes price for a requested query. Will revert if request hasn't been requested yet or has been
* resolved already.
*/
function _publishPrice(
uint8 chainID,
bytes32 identifier,
uint256 time,
bytes memory ancillaryData,
int256 price
) internal {
bytes32 priceRequestId = _encodePriceRequest(chainID, identifier, time, ancillaryData);
Price storage lookup = prices[priceRequestId];
require(lookup.state == RequestState.Requested, "Price request is not currently pending");
lookup.price = price;
lookup.state = RequestState.Resolved;
emit PushedPrice(msg.sender, chainID, identifier, time, ancillaryData, lookup.price);
}
/**
* @notice Returns Bridge contract on network.
*/
function _getBridge() internal view returns (IBridge) {
return IBridge(finder.getImplementationAddress(OracleInterfaces.Bridge));
}
/**
* @notice Returns the convenient way to store price requests, uniquely identified by {chainID, identifier, time,
* ancillaryData }.
*/
function _encodePriceRequest(
uint8 chainID,
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) internal pure returns (bytes32) {
return keccak256(abi.encode(chainID, identifier, time, ancillaryData));
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "./BeaconOracle.sol";
import "../oracle/interfaces/OracleAncillaryInterface.sol";
/**
* @title Extension of BeaconOracle that is intended to be deployed on Mainnet to give financial
* contracts on non-Mainnet networks the ability to trigger cross-chain price requests to the Mainnet DVM. This contract
* is responsible for triggering price requests originating from non-Mainnet, and broadcasting resolved price data
* back to those networks. Technically, this contract is more of a Proxy than an Oracle, because it does not implement
* the full Oracle interface including the getPrice and requestPrice methods. It's goal is to shuttle price request
* functionality between L2 and L1.
* @dev The intended client of this contract is some off-chain bot watching for resolved price events on the DVM. Once
* that bot sees a price has resolved, it can call `publishPrice()` on this contract which will call the local Bridge
* contract to signal to an off-chain relayer to bridge a price request to another network.
* @dev This contract must be a registered financial contract in order to call DVM methods.
*/
contract SourceOracle is BeaconOracle {
constructor(address _finderAddress, uint8 _chainID) BeaconOracle(_finderAddress, _chainID) {}
/***************************************************************
* Publishing Price Request Data to L2:
***************************************************************/
/**
* @notice This is the first method that should be called in order to publish a price request to another network
* marked by `sinkChainID`.
* @dev Publishes the DVM resolved price for the price request, or reverts if not resolved yet. Will call the
* local Bridge's deposit() method which will emit a Deposit event in order to signal to an off-chain
* relayer to begin the cross-chain process.
*/
function publishPrice(
uint8 sinkChainID,
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public {
require(_getOracle().hasPrice(identifier, time, ancillaryData), "DVM has not resolved price");
int256 price = _getOracle().getPrice(identifier, time, ancillaryData);
_publishPrice(sinkChainID, identifier, time, ancillaryData, price);
// Call Bridge.deposit() to initiate cross-chain publishing of price request.
_getBridge().deposit(
sinkChainID,
getResourceId(),
_formatMetadata(sinkChainID, identifier, time, ancillaryData, price)
);
}
/**
* @notice This method will ultimately be called after `publishPrice` calls `Bridge.deposit()`, which will call
* `GenericHandler.deposit()` and ultimately this method.
* @dev This method should basically check that the `Bridge.deposit()` was triggered by a valid publish event.
*/
function validateDeposit(
uint8 sinkChainID,
bytes32 identifier,
uint256 time,
bytes memory ancillaryData,
int256 price
) public view {
bytes32 priceRequestId = _encodePriceRequest(sinkChainID, identifier, time, ancillaryData);
Price storage lookup = prices[priceRequestId];
require(lookup.state == RequestState.Resolved, "Price has not been published");
require(lookup.price == price, "Unexpected price published");
}
/***************************************************************
* Responding to a Price Request from L2:
***************************************************************/
/**
* @notice This method will ultimately be called after a `requestPrice` has been bridged cross-chain from
* non-Mainnet to this network via an off-chain relayer. The relayer will call `Bridge.executeProposal` on this
* local network, which call `GenericHandler.executeProposal()` and ultimately this method.
* @dev This method should prepare this oracle to receive a published price and then forward the price request
* to the DVM. Can only be called by the `GenericHandler`.
*/
function executeRequestPrice(
uint8 sinkChainID,
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public onlyGenericHandlerContract() {
_requestPrice(sinkChainID, identifier, time, ancillaryData);
_getOracle().requestPrice(identifier, time, ancillaryData);
}
/**
* @notice Convenience method to get cross-chain Bridge resource ID linking this contract with its SinkOracles.
* @dev More details about Resource ID's here: https://chainbridge.chainsafe.io/spec/#resource-id
* @return bytes32 Hash containing this stored chain ID.
*/
function getResourceId() public view returns (bytes32) {
return keccak256(abi.encode("Oracle", currentChainID));
}
/**
* @notice Return DVM for this network.
*/
function _getOracle() internal view returns (OracleAncillaryInterface) {
return OracleAncillaryInterface(finder.getImplementationAddress(OracleInterfaces.Oracle));
}
/**
* @notice This helper method is useful for calling Bridge.deposit().
* @dev GenericHandler.deposit() expects data to be formatted as:
* len(data) uint256 bytes 0 - 64
* data bytes bytes 64 - END
*/
function _formatMetadata(
uint8 chainID,
bytes32 identifier,
uint256 time,
bytes memory ancillaryData,
int256 price
) internal pure returns (bytes memory) {
bytes memory metadata = abi.encode(chainID, identifier, time, ancillaryData, price);
return abi.encodePacked(metadata.length, metadata);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "./BeaconOracle.sol";
import "../oracle/interfaces/OracleAncillaryInterface.sol";
import "../oracle/interfaces/RegistryInterface.sol";
/**
* @title Extension of BeaconOracle that is intended to be deployed on non-Mainnet networks to give financial
* contracts on those networks the ability to trigger cross-chain price requests to the Mainnet DVM. Also has the
* ability to receive published prices from Mainnet. This contract can be treated as the "DVM" for a non-Mainnet
* network, because a calling contract can request and access a resolved price request from this contract.
* @dev The intended client of this contract is an OptimisticOracle on a non-Mainnet network that needs price
* resolution secured by the DVM on Mainnet. If a registered contract, such as the OptimisticOracle, calls
* `requestPrice()` on this contract, then it will call the network's Bridge contract to signal to an off-chain
* relayer to bridge a price request to Mainnet.
*/
contract SinkOracle is BeaconOracle, OracleAncillaryInterface {
// Chain ID of the Source Oracle that will communicate this contract's price request to the DVM on Mainnet.
uint8 public destinationChainID;
constructor(
address _finderAddress,
uint8 _chainID,
uint8 _destinationChainID
) BeaconOracle(_finderAddress, _chainID) {
destinationChainID = _destinationChainID;
}
// This assumes that the local network has a Registry that resembles the Mainnet registry.
modifier onlyRegisteredContract() {
RegistryInterface registry = RegistryInterface(finder.getImplementationAddress(OracleInterfaces.Registry));
require(registry.isContractRegistered(msg.sender), "Caller must be registered");
_;
}
/***************************************************************
* Bridging a Price Request to L1:
***************************************************************/
/**
* @notice This is the first method that should be called in order to bridge a price request to Mainnet.
* @dev Can be called only by a Registered contract that is allowed to make DVM price requests. Will mark this
* price request as Requested, and therefore able to receive the ultimate price resolution data, and also
* calls the local Bridge's deposit() method which will emit a Deposit event in order to signal to an off-chain
* relayer to begin the cross-chain process.
*/
function requestPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public override onlyRegisteredContract() {
_requestPrice(currentChainID, identifier, time, ancillaryData);
// Call Bridge.deposit() to intiate cross-chain price request.
_getBridge().deposit(
destinationChainID,
getResourceId(),
_formatMetadata(currentChainID, identifier, time, ancillaryData)
);
}
/**
* @notice This method will ultimately be called after `requestPrice` calls `Bridge.deposit()`, which will call
* `GenericHandler.deposit()` and ultimately this method.
* @dev This method should basically check that the `Bridge.deposit()` was triggered by a valid price request,
* specifically one that has not resolved yet and was called by a registered contract. Without this check,
* `Bridge.deposit()` could be called by non-registered contracts to make price requests to the DVM.
*/
function validateDeposit(
uint8 sinkChainID,
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public view {
bytes32 priceRequestId = _encodePriceRequest(sinkChainID, identifier, time, ancillaryData);
Price storage lookup = prices[priceRequestId];
require(lookup.state == RequestState.Requested, "Price has not been requested");
}
/***************************************************************
* Responding to Price Request Resolution from L1:
***************************************************************/
/**
* @notice This method will ultimately be called after a `publishPrice` has been bridged cross-chain from Mainnet
* to this network via an off-chain relayer. The relayer will call `Bridge.executeProposal` on this local network,
* which call `GenericHandler.executeProposal()` and ultimately this method.
* @dev This method should publish the price data for a requested price request. If this method fails for some
* reason, then it means that the price was never requested. Can only be called by the `GenericHandler`.
*/
function executePublishPrice(
uint8 sinkChainID,
bytes32 identifier,
uint256 time,
bytes memory ancillaryData,
int256 price
) public onlyGenericHandlerContract() {
_publishPrice(sinkChainID, identifier, time, ancillaryData, price);
}
/**
* @notice Returns whether a price has resolved for the request.
* @return True if a price is available, False otherwise. If true, then getPrice will succeed for the request.
*/
function hasPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public view override onlyRegisteredContract() returns (bool) {
bytes32 priceRequestId = _encodePriceRequest(currentChainID, identifier, time, ancillaryData);
return prices[priceRequestId].state == RequestState.Resolved;
}
/**
* @notice Returns resolved price for the request.
* @return int256 Price, or reverts if no resolved price for any reason.
*/
function getPrice(
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) public view override onlyRegisteredContract() returns (int256) {
bytes32 priceRequestId = _encodePriceRequest(currentChainID, identifier, time, ancillaryData);
Price storage lookup = prices[priceRequestId];
require(lookup.state == RequestState.Resolved, "Price has not been resolved");
return lookup.price;
}
/**
* @notice Convenience method to get cross-chain Bridge resource ID linking this contract with the SourceOracle.
* @dev More details about Resource ID's here: https://chainbridge.chainsafe.io/spec/#resource-id
* @return bytes32 Hash containing the chain ID of the SourceOracle.
*/
function getResourceId() public view returns (bytes32) {
return keccak256(abi.encode("Oracle", destinationChainID));
}
/**
* @notice This helper method is useful for calling Bridge.deposit().
* @dev GenericHandler.deposit() expects data to be formatted as:
* len(data) uint256 bytes 0 - 64
* data bytes bytes 64 - END
*/
function _formatMetadata(
uint8 chainID,
bytes32 identifier,
uint256 time,
bytes memory ancillaryData
) internal pure returns (bytes memory) {
bytes memory metadata = abi.encode(chainID, identifier, time, ancillaryData);
return abi.encodePacked(metadata.length, metadata);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/ExpandedERC20.sol";
contract TokenSender {
function transferERC20(
address tokenAddress,
address recipientAddress,
uint256 amount
) public returns (bool) {
IERC20 token = IERC20(tokenAddress);
token.transfer(recipientAddress, amount);
return true;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "./FinancialProductLibrary.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "../../../common/implementation/Lockable.sol";
/**
* @title Structured Note Financial Product Library
* @notice Adds custom price transformation logic to modify the behavior of the expiring multi party contract. The
* contract holds say 1 WETH in collateral and pays out that 1 WETH if, at expiry, ETHUSD is below a set strike. If
* ETHUSD is above that strike, the contract pays out a given dollar amount of ETH.
* Example: expiry is DEC 31. Strike is $400. Each token is backed by 1 WETH
* If ETHUSD < $400 at expiry, token is redeemed for 1 ETH.
* If ETHUSD >= $400 at expiry, token is redeemed for $400 worth of ETH, as determined by the DVM.
*/
contract StructuredNoteFinancialProductLibrary is FinancialProductLibrary, Ownable, Lockable {
using FixedPoint for FixedPoint.Unsigned;
mapping(address => FixedPoint.Unsigned) financialProductStrikes;
/**
* @notice Enables the deployer of the library to set the strike price for an associated financial product.
* @param financialProduct address of the financial product.
* @param strikePrice the strike price for the structured note to be applied to the financial product.
* @dev Note: a) Only the owner (deployer) of this library can set new strike prices b) A strike price cannot be 0.
* c) A strike price can only be set once to prevent the deployer from changing the strike after the fact.
* d) financialProduct must exposes an expirationTimestamp method.
*/
function setFinancialProductStrike(address financialProduct, FixedPoint.Unsigned memory strikePrice)
public
onlyOwner
nonReentrant()
{
require(strikePrice.isGreaterThan(0), "Cant set 0 strike");
require(financialProductStrikes[financialProduct].isEqual(0), "Strike already set");
require(ExpiringContractInterface(financialProduct).expirationTimestamp() != 0, "Invalid EMP contract");
financialProductStrikes[financialProduct] = strikePrice;
}
/**
* @notice Returns the strike price associated with a given financial product address.
* @param financialProduct address of the financial product.
* @return strikePrice for the associated financial product.
*/
function getStrikeForFinancialProduct(address financialProduct)
public
view
nonReentrantView()
returns (FixedPoint.Unsigned memory)
{
return financialProductStrikes[financialProduct];
}
/**
* @notice Returns a transformed price by applying the structured note payout structure.
* @param oraclePrice price from the oracle to be transformed.
* @param requestTime timestamp the oraclePrice was requested at.
* @return transformedPrice the input oracle price with the price transformation logic applied to it.
*/
function transformPrice(FixedPoint.Unsigned memory oraclePrice, uint256 requestTime)
public
view
override
nonReentrantView()
returns (FixedPoint.Unsigned memory)
{
FixedPoint.Unsigned memory strike = financialProductStrikes[msg.sender];
require(strike.isGreaterThan(0), "Caller has no strike");
// If price request is made before expiry, return 1. Thus we can keep the contract 100% collateralized with
// each token backed 1:1 by collateral currency.
if (requestTime < ExpiringContractInterface(msg.sender).expirationTimestamp()) {
return FixedPoint.fromUnscaledUint(1);
}
if (oraclePrice.isLessThan(strike)) {
return FixedPoint.fromUnscaledUint(1);
} else {
// Token expires to be worth strike $ worth of collateral.
// eg if ETHUSD is $500 and strike is $400, token is redeemable for 400/500 = 0.8 WETH.
return strike.div(oraclePrice);
}
}
/**
* @notice Returns a transformed collateral requirement by applying the structured note payout structure. If the price
* of the structured note is greater than the strike then the collateral requirement scales down accordingly.
* @param oraclePrice price from the oracle to transform the collateral requirement.
* @param collateralRequirement financial products collateral requirement to be scaled according to price and strike.
* @return transformedCollateralRequirement the input collateral requirement with the transformation logic applied to it.
*/
function transformCollateralRequirement(
FixedPoint.Unsigned memory oraclePrice,
FixedPoint.Unsigned memory collateralRequirement
) public view override nonReentrantView() returns (FixedPoint.Unsigned memory) {
FixedPoint.Unsigned memory strike = financialProductStrikes[msg.sender];
require(strike.isGreaterThan(0), "Caller has no strike");
// If the price is less than the strike than the original collateral requirement is used.
if (oraclePrice.isLessThan(strike)) {
return collateralRequirement;
} else {
// If the price is more than the strike then the collateral requirement is scaled by the strike. For example
// a strike of $400 and a CR of 1.2 would yield:
// ETHUSD = $350, payout is 1 WETH. CR is multiplied by 1. resulting CR = 1.2
// ETHUSD = $400, payout is 1 WETH. CR is multiplied by 1. resulting CR = 1.2
// ETHUSD = $425, payout is 0.941 WETH (worth $400). CR is multiplied by 0.941. resulting CR = 1.1292
// ETHUSD = $500, payout is 0.8 WETH (worth $400). CR multiplied by 0.8. resulting CR = 0.96
return collateralRequirement.mul(strike.div(oraclePrice));
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "./FinancialProductLibrary.sol";
import "../../../common/implementation/Lockable.sol";
/**
* @title Pre-Expiration Identifier Transformation Financial Product Library
* @notice Adds custom identifier transformation to enable a financial contract to use two different identifiers, depending
* on when a price request is made. If the request is made before expiration then a transformation is made to the identifier
* & if it is at or after expiration then the original identifier is returned. This library enables self referential
* TWAP identifier to be used on synthetics pre-expiration, in conjunction with a separate identifier at expiration.
*/
contract PreExpirationIdentifierTransformationFinancialProductLibrary is FinancialProductLibrary, Lockable {
mapping(address => bytes32) financialProductTransformedIdentifiers;
/**
* @notice Enables the deployer of the library to set the transformed identifier for an associated financial product.
* @param financialProduct address of the financial product.
* @param transformedIdentifier the identifier for the financial product to be used if the contract is pre expiration.
* @dev Note: a) Any address can set identifier transformations b) The identifier can't be set to blank. c) A
* transformed price can only be set once to prevent the deployer from changing it after the fact. d) financialProduct
* must expose an expirationTimestamp method.
*/
function setFinancialProductTransformedIdentifier(address financialProduct, bytes32 transformedIdentifier)
public
nonReentrant()
{
require(transformedIdentifier != "", "Cant set to empty transformation");
require(financialProductTransformedIdentifiers[financialProduct] == "", "Transformation already set");
require(ExpiringContractInterface(financialProduct).expirationTimestamp() != 0, "Invalid EMP contract");
financialProductTransformedIdentifiers[financialProduct] = transformedIdentifier;
}
/**
* @notice Returns the transformed identifier associated with a given financial product address.
* @param financialProduct address of the financial product.
* @return transformed identifier for the associated financial product.
*/
function getTransformedIdentifierForFinancialProduct(address financialProduct)
public
view
nonReentrantView()
returns (bytes32)
{
return financialProductTransformedIdentifiers[financialProduct];
}
/**
* @notice Returns a transformed price identifier if the contract is pre-expiration and no transformation if post.
* @param identifier input price identifier to be transformed.
* @param requestTime timestamp the identifier is to be used at.
* @return transformedPriceIdentifier the input price identifier with the transformation logic applied to it.
*/
function transformPriceIdentifier(bytes32 identifier, uint256 requestTime)
public
view
override
nonReentrantView()
returns (bytes32)
{
require(financialProductTransformedIdentifiers[msg.sender] != "", "Caller has no transformation");
// If the request time is before contract expiration then return the transformed identifier. Else, return the
// original price identifier.
if (requestTime < ExpiringContractInterface(msg.sender).expirationTimestamp()) {
return financialProductTransformedIdentifiers[msg.sender];
} else {
return identifier;
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "./FinancialProductLibrary.sol";
import "../../../common/implementation/Lockable.sol";
/**
* @title Post-Expiration Identifier Transformation Financial Product Library
* @notice Adds custom identifier transformation to enable a financial contract to use two different identifiers, depending
* on when a price request is made. If the request is made at or after expiration then a transformation is made to the identifier
* & if it is before expiration then the original identifier is returned. This library enables self referential
* TWAP identifier to be used on synthetics pre-expiration, in conjunction with a separate identifier at expiration.
*/
contract PostExpirationIdentifierTransformationFinancialProductLibrary is FinancialProductLibrary, Lockable {
mapping(address => bytes32) financialProductTransformedIdentifiers;
/**
* @notice Enables the deployer of the library to set the transformed identifier for an associated financial product.
* @param financialProduct address of the financial product.
* @param transformedIdentifier the identifier for the financial product to be used if the contract is post expiration.
* @dev Note: a) Any address can set identifier transformations b) The identifier can't be set to blank. c) A
* transformed price can only be set once to prevent the deployer from changing it after the fact. d) financialProduct
* must expose an expirationTimestamp method.
*/
function setFinancialProductTransformedIdentifier(address financialProduct, bytes32 transformedIdentifier)
public
nonReentrant()
{
require(transformedIdentifier != "", "Cant set to empty transformation");
require(financialProductTransformedIdentifiers[financialProduct] == "", "Transformation already set");
require(ExpiringContractInterface(financialProduct).expirationTimestamp() != 0, "Invalid EMP contract");
financialProductTransformedIdentifiers[financialProduct] = transformedIdentifier;
}
/**
* @notice Returns the transformed identifier associated with a given financial product address.
* @param financialProduct address of the financial product.
* @return transformed identifier for the associated financial product.
*/
function getTransformedIdentifierForFinancialProduct(address financialProduct)
public
view
nonReentrantView()
returns (bytes32)
{
return financialProductTransformedIdentifiers[financialProduct];
}
/**
* @notice Returns a transformed price identifier if the contract is post-expiration and no transformation if pre.
* @param identifier input price identifier to be transformed.
* @param requestTime timestamp the identifier is to be used at.
* @return transformedPriceIdentifier the input price identifier with the transformation logic applied to it.
*/
function transformPriceIdentifier(bytes32 identifier, uint256 requestTime)
public
view
override
nonReentrantView()
returns (bytes32)
{
require(financialProductTransformedIdentifiers[msg.sender] != "", "Caller has no transformation");
// If the request time is after contract expiration then return the transformed identifier. Else, return the
// original price identifier.
if (requestTime < ExpiringContractInterface(msg.sender).expirationTimestamp()) {
return identifier;
} else {
return financialProductTransformedIdentifiers[msg.sender];
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "./FinancialProductLibrary.sol";
import "../../../common/implementation/Lockable.sol";
/**
* @title KPI Options Financial Product Library
* @notice Adds custom tranformation logic to modify the price and collateral requirement behavior of the expiring multi party contract.
* If a price request is made pre-expiry, the price should always be set to 2 and the collateral requirement should be set to 1.
* Post-expiry, the collateral requirement is left as 1 and the price is left unchanged.
*/
contract KpiOptionsFinancialProductLibrary is FinancialProductLibrary, Lockable {
using FixedPoint for FixedPoint.Unsigned;
mapping(address => FixedPoint.Unsigned) financialProductTransformedPrices;
/**
* @notice Enables any address to set the transformed pricxe for an associated financial product.
* @param financialProduct address of the financial product.
* @param transformedPrice the price for the financial product to be used if the contract is pre-expiration.
* @dev Note: a) Any address can set identifier transformations b) The price can't be set to blank.
* c) A transformed price can only be set once to prevent the deployer from changing it after the fact.
* d) financialProduct must expose an expirationTimestamp method.
*/
function setFinancialProductTransformedPrice(address financialProduct, FixedPoint.Unsigned memory transformedPrice)
public
nonReentrant()
{
require(transformedPrice.isGreaterThan(0), "Cant set price of 0");
require(financialProductTransformedPrices[financialProduct].isEqual(0), "Price already set");
require(ExpiringContractInterface(financialProduct).expirationTimestamp() != 0, "Invalid EMP contract");
financialProductTransformedPrices[financialProduct] = transformedPrice;
}
/**
* @notice Returns the transformed price associated with a given financial product address.
* @param financialProduct address of the financial product.
* @return transformed price for the associated financial product.
*/
function getTransformedPriceForFinancialProduct(address financialProduct)
public
view
nonReentrantView()
returns (FixedPoint.Unsigned memory)
{
return financialProductTransformedPrices[financialProduct];
}
/**
* @notice Returns a transformed price for pre-expiry price requests.
* @param oraclePrice price from the oracle to be transformed.
* @param requestTime timestamp the oraclePrice was requested at.
* @return transformedPrice the input oracle price with the price transformation logic applied to it.
*/
function transformPrice(FixedPoint.Unsigned memory oraclePrice, uint256 requestTime)
public
view
override
nonReentrantView()
returns (FixedPoint.Unsigned memory)
{
FixedPoint.Unsigned memory transformedPrice = financialProductTransformedPrices[msg.sender];
require(transformedPrice.isGreaterThan(0), "Caller has no transformation");
// If price request is made before expiry, return transformed price. Post-expiry, leave unchanged.
//
if (requestTime < ExpiringContractInterface(msg.sender).expirationTimestamp()) {
return transformedPrice;
} else {
return oraclePrice;
}
}
/**
* @notice Returns a transformed collateral requirement that is set to be equivalent to 2 tokens pre-expiry.
* @param oraclePrice price from the oracle to transform the collateral requirement.
* @param collateralRequirement financial products collateral requirement to be scaled to a flat rate.
* @return transformedCollateralRequirement the input collateral requirement with the transformation logic applied to it.
*/
function transformCollateralRequirement(
FixedPoint.Unsigned memory oraclePrice,
FixedPoint.Unsigned memory collateralRequirement
) public view override nonReentrantView() returns (FixedPoint.Unsigned memory) {
// Always return 1.
return FixedPoint.fromUnscaledUint(1);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "./FinancialProductLibrary.sol";
import "../../../common/implementation/Lockable.sol";
/**
* @title CoveredCall Financial Product Library
* @notice Adds custom price transformation logic to modify the behavior of the expiring multi party contract. The
* contract holds say 1 WETH in collateral and pays out a portion of that, at expiry, if ETHUSD is above a set strike. If
* ETHUSD is below that strike, the contract pays out 0. The fraction paid out if above the strike is defined by
* (oraclePrice - strikePrice) / oraclePrice;
* Example: expiry is DEC 31. Strike is $400. Each token is backed by 1 WETH.
* If ETHUSD = $600 at expiry, the call is $200 in the money, and the contract pays out 0.333 WETH (worth $200).
* If ETHUSD = $800 at expiry, the call is $400 in the money, and the contract pays out 0.5 WETH (worth $400).
* If ETHUSD =< $400 at expiry, the call is out of the money, and the contract pays out 0 WETH.
*/
contract CoveredCallFinancialProductLibrary is FinancialProductLibrary, Lockable {
using FixedPoint for FixedPoint.Unsigned;
mapping(address => FixedPoint.Unsigned) private financialProductStrikes;
/**
* @notice Enables any address to set the strike price for an associated financial product.
* @param financialProduct address of the financial product.
* @param strikePrice the strike price for the covered call to be applied to the financial product.
* @dev Note: a) Any address can set the initial strike price b) A strike price cannot be 0.
* c) A strike price can only be set once to prevent the deployer from changing the strike after the fact.
* d) For safety, a strike price should be set before depositing any synthetic tokens in a liquidity pool.
* e) financialProduct must expose an expirationTimestamp method.
*/
function setFinancialProductStrike(address financialProduct, FixedPoint.Unsigned memory strikePrice)
public
nonReentrant()
{
require(strikePrice.isGreaterThan(0), "Cant set 0 strike");
require(financialProductStrikes[financialProduct].isEqual(0), "Strike already set");
require(ExpiringContractInterface(financialProduct).expirationTimestamp() != 0, "Invalid EMP contract");
financialProductStrikes[financialProduct] = strikePrice;
}
/**
* @notice Returns the strike price associated with a given financial product address.
* @param financialProduct address of the financial product.
* @return strikePrice for the associated financial product.
*/
function getStrikeForFinancialProduct(address financialProduct)
public
view
nonReentrantView()
returns (FixedPoint.Unsigned memory)
{
return financialProductStrikes[financialProduct];
}
/**
* @notice Returns a transformed price by applying the call option payout structure.
* @param oraclePrice price from the oracle to be transformed.
* @param requestTime timestamp the oraclePrice was requested at.
* @return transformedPrice the input oracle price with the price transformation logic applied to it.
*/
function transformPrice(FixedPoint.Unsigned memory oraclePrice, uint256 requestTime)
public
view
override
nonReentrantView()
returns (FixedPoint.Unsigned memory)
{
FixedPoint.Unsigned memory strike = financialProductStrikes[msg.sender];
require(strike.isGreaterThan(0), "Caller has no strike");
// If price request is made before expiry, return 1. Thus we can keep the contract 100% collateralized with
// each token backed 1:1 by collateral currency.
if (requestTime < ExpiringContractInterface(msg.sender).expirationTimestamp()) {
return FixedPoint.fromUnscaledUint(1);
}
if (oraclePrice.isLessThanOrEqual(strike)) {
return FixedPoint.fromUnscaledUint(0);
} else {
// Token expires to be worth the fraction of a collateral token that's in the money.
// eg if ETHUSD is $500 and strike is $400, token is redeemable for 100/500 = 0.2 WETH (worth $100).
// Note: oraclePrice cannot be 0 here because it would always satisfy the if above because 0 <= x is always
// true.
return (oraclePrice.sub(strike)).div(oraclePrice);
}
}
/**
* @notice Returns a transformed collateral requirement by applying the covered call payout structure.
* @param oraclePrice price from the oracle to transform the collateral requirement.
* @param collateralRequirement financial products collateral requirement to be scaled according to price and strike.
* @return transformedCollateralRequirement the input collateral requirement with the transformation logic applied to it.
*/
function transformCollateralRequirement(
FixedPoint.Unsigned memory oraclePrice,
FixedPoint.Unsigned memory collateralRequirement
) public view override nonReentrantView() returns (FixedPoint.Unsigned memory) {
FixedPoint.Unsigned memory strike = financialProductStrikes[msg.sender];
require(strike.isGreaterThan(0), "Caller has no strike");
// Always return 1 because option must be collateralized by 1 token.
return FixedPoint.fromUnscaledUint(1);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../implementation/Lockable.sol";
import "./ReentrancyAttack.sol";
// Tests reentrancy guards defined in Lockable.sol.
// Extends https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v3.0.1/contracts/mocks/ReentrancyMock.sol.
contract ReentrancyMock is Lockable {
uint256 public counter;
constructor() {
counter = 0;
}
function callback() external nonReentrant {
_count();
}
function countAndSend(ReentrancyAttack attacker) external nonReentrant {
_count();
bytes4 func = bytes4(keccak256("callback()"));
attacker.callSender(func);
}
function countAndCall(ReentrancyAttack attacker) external nonReentrant {
_count();
bytes4 func = bytes4(keccak256("getCount()"));
attacker.callSender(func);
}
function countLocalRecursive(uint256 n) public nonReentrant {
if (n > 0) {
_count();
countLocalRecursive(n - 1);
}
}
function countThisRecursive(uint256 n) public nonReentrant {
if (n > 0) {
_count();
// solhint-disable-next-line avoid-low-level-calls
(bool success, ) = address(this).call(abi.encodeWithSignature("countThisRecursive(uint256)", n - 1));
require(success, "ReentrancyMock: failed call");
}
}
function countLocalCall() public nonReentrant {
getCount();
}
function countThisCall() public nonReentrant {
// solhint-disable-next-line avoid-low-level-calls
(bool success, ) = address(this).call(abi.encodeWithSignature("getCount()"));
require(success, "ReentrancyMock: failed call");
}
function getCount() public view nonReentrantView returns (uint256) {
return counter;
}
function _count() private {
counter += 1;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
// Tests reentrancy guards defined in Lockable.sol.
// Copied from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v3.0.1/contracts/mocks/ReentrancyAttack.sol.
contract ReentrancyAttack {
function callSender(bytes4 data) public {
// solhint-disable-next-line avoid-low-level-calls
(bool success, ) = msg.sender.call(abi.encodeWithSelector(data));
require(success, "ReentrancyAttack: failed call");
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol";
import "@uniswap/lib/contracts/libraries/Babylonian.sol";
import "@uniswap/lib/contracts/libraries/TransferHelper.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol";
/**
* @title UniswapBroker
* @notice Trading contract used to arb uniswap pairs to a desired "true" price. Intended use is to arb UMA perpetual
* synthetics that trade off peg. This implementation can ber used in conjunction with a DSProxy contract to atomically
* swap and move a uniswap market.
*/
contract UniswapBroker {
using SafeMath for uint256;
/**
* @notice Swaps an amount of either token such that the trade results in the uniswap pair's price being as close as
* possible to the truePrice.
* @dev True price is expressed in the ratio of token A to token B.
* @dev The caller must approve this contract to spend whichever token is intended to be swapped.
* @param tradingAsEOA bool to indicate if the UniswapBroker is being called by a DSProxy or an EOA.
* @param uniswapRouter address of the uniswap router used to facilitate trades.
* @param uniswapFactory address of the uniswap factory used to fetch current pair reserves.
* @param swappedTokens array of addresses which are to be swapped. The order does not matter as the function will figure
* out which tokens need to be exchanged to move the market to the desired "true" price.
* @param truePriceTokens array of unit used to represent the true price. 0th value is the numerator of the true price
* and the 1st value is the the denominator of the true price.
* @param maxSpendTokens array of unit to represent the max to spend in the two tokens.
* @param to recipient of the trade proceeds.
* @param deadline to limit when the trade can execute. If the tx is mined after this timestamp then revert.
*/
function swapToPrice(
bool tradingAsEOA,
address uniswapRouter,
address uniswapFactory,
address[2] memory swappedTokens,
uint256[2] memory truePriceTokens,
uint256[2] memory maxSpendTokens,
address to,
uint256 deadline
) public {
IUniswapV2Router01 router = IUniswapV2Router01(uniswapRouter);
// true price is expressed as a ratio, so both values must be non-zero
require(truePriceTokens[0] != 0 && truePriceTokens[1] != 0, "SwapToPrice: ZERO_PRICE");
// caller can specify 0 for either if they wish to swap in only one direction, but not both
require(maxSpendTokens[0] != 0 || maxSpendTokens[1] != 0, "SwapToPrice: ZERO_SPEND");
bool aToB;
uint256 amountIn;
{
(uint256 reserveA, uint256 reserveB) = getReserves(uniswapFactory, swappedTokens[0], swappedTokens[1]);
(aToB, amountIn) = computeTradeToMoveMarket(truePriceTokens[0], truePriceTokens[1], reserveA, reserveB);
}
require(amountIn > 0, "SwapToPrice: ZERO_AMOUNT_IN");
// spend up to the allowance of the token in
uint256 maxSpend = aToB ? maxSpendTokens[0] : maxSpendTokens[1];
if (amountIn > maxSpend) {
amountIn = maxSpend;
}
address tokenIn = aToB ? swappedTokens[0] : swappedTokens[1];
address tokenOut = aToB ? swappedTokens[1] : swappedTokens[0];
TransferHelper.safeApprove(tokenIn, address(router), amountIn);
if (tradingAsEOA) TransferHelper.safeTransferFrom(tokenIn, msg.sender, address(this), amountIn);
address[] memory path = new address[](2);
path[0] = tokenIn;
path[1] = tokenOut;
router.swapExactTokensForTokens(
amountIn,
0, // amountOutMin: we can skip computing this number because the math is tested within the uniswap tests.
path,
to,
deadline
);
}
/**
* @notice Given the "true" price a token (represented by truePriceTokenA/truePriceTokenB) and the reservers in the
* uniswap pair, calculate: a) the direction of trade (aToB) and b) the amount needed to trade (amountIn) to move
* the pool price to be equal to the true price.
* @dev Note that this method uses the Babylonian square root method which has a small margin of error which will
* result in a small over or under estimation on the size of the trade needed.
* @param truePriceTokenA the nominator of the true price.
* @param truePriceTokenB the denominator of the true price.
* @param reserveA number of token A in the pair reserves
* @param reserveB number of token B in the pair reserves
*/
//
function computeTradeToMoveMarket(
uint256 truePriceTokenA,
uint256 truePriceTokenB,
uint256 reserveA,
uint256 reserveB
) public pure returns (bool aToB, uint256 amountIn) {
aToB = FullMath.mulDiv(reserveA, truePriceTokenB, reserveB) < truePriceTokenA;
uint256 invariant = reserveA.mul(reserveB);
// The trade ∆a of token a required to move the market to some desired price P' from the current price P can be
// found with ∆a=(kP')^1/2-Ra.
uint256 leftSide =
Babylonian.sqrt(
FullMath.mulDiv(
invariant,
aToB ? truePriceTokenA : truePriceTokenB,
aToB ? truePriceTokenB : truePriceTokenA
)
);
uint256 rightSide = (aToB ? reserveA : reserveB);
if (leftSide < rightSide) return (false, 0);
// compute the amount that must be sent to move the price back to the true price.
amountIn = leftSide.sub(rightSide);
}
// The methods below are taken from https://github.com/Uniswap/uniswap-v2-periphery/blob/master/contracts/libraries/UniswapV2Library.sol
// We could import this library into this contract but this library is dependent Uniswap's SafeMath, which is bound
// to solidity 6.6.6. UMA uses 0.8.0 and so a modified version is needed to accomidate this solidity version.
function getReserves(
address factory,
address tokenA,
address tokenB
) public view returns (uint256 reserveA, uint256 reserveB) {
(address token0, ) = sortTokens(tokenA, tokenB);
(uint256 reserve0, uint256 reserve1, ) = IUniswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves();
(reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
}
function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
require(tokenA != tokenB, "UniswapV2Library: IDENTICAL_ADDRESSES");
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), "UniswapV2Library: ZERO_ADDRESS");
}
// calculates the CREATE2 address for a pair without making any external calls
function pairFor(
address factory,
address tokenA,
address tokenB
) internal pure returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(
uint160(
uint256(
keccak256(
abi.encodePacked(
hex"ff",
factory,
keccak256(abi.encodePacked(token0, token1)),
hex"96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f" // init code hash
)
)
)
)
);
}
}
// The library below is taken from @uniswap/lib/contracts/libraries/FullMath.sol. It has been modified to work with solidity 0.8
library FullMath {
/// @notice Calculates floor(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
/// @param a The multiplicand
/// @param b The multiplier
/// @param denominator The divisor
/// @return result The 256-bit result
/// @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv
function mulDiv(
uint256 a,
uint256 b,
uint256 denominator
) internal pure returns (uint256 result) {
// 512-bit multiply [prod1 prod0] = a * b
// Compute the product mod 2**256 and mod 2**256 - 1
// then use the Chinese Remainder Theorem to reconstruct
// the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2**256 + prod0
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(a, b, not(0))
prod0 := mul(a, b)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division
if (prod1 == 0) {
require(denominator > 0);
assembly {
result := div(prod0, denominator)
}
return result;
}
// Make sure the result is less than 2**256.
// Also prevents denominator == 0
require(denominator > prod1);
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0]
// Compute remainder using mulmod
uint256 remainder;
assembly {
remainder := mulmod(a, b, denominator)
}
// Subtract 256 bit number from 512 bit number
assembly {
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator
// Compute largest power of two divisor of denominator.
// Always >= 1.
uint256 twos = denominator & (~denominator + 1);
// Divide denominator by power of two
assembly {
denominator := div(denominator, twos)
}
// Divide [prod1 prod0] by the factors of two
assembly {
prod0 := div(prod0, twos)
}
// Shift in bits from prod1 into prod0. For this we need
// to flip `twos` such that it is 2**256 / twos.
// If twos is zero, then it becomes one
assembly {
twos := add(div(sub(0, twos), twos), 1)
}
prod0 |= prod1 * twos;
// Invert denominator mod 2**256
// Now that denominator is an odd number, it has an inverse
// modulo 2**256 such that denominator * inv = 1 mod 2**256.
// Compute the inverse by starting with a seed that is correct
// correct for four bits. That is, denominator * inv = 1 mod 2**4
uint256 inv = (3 * denominator) ^ 2;
// Now use Newton-Raphson iteration to improve the precision.
// Thanks to Hensel's lifting lemma, this also works in modular
// arithmetic, doubling the correct bits in each step.
inv *= 2 - denominator * inv; // inverse mod 2**8
inv *= 2 - denominator * inv; // inverse mod 2**16
inv *= 2 - denominator * inv; // inverse mod 2**32
inv *= 2 - denominator * inv; // inverse mod 2**64
inv *= 2 - denominator * inv; // inverse mod 2**128
inv *= 2 - denominator * inv; // inverse mod 2**256
// Because the division is now exact we can divide by multiplying
// with the modular inverse of denominator. This will give us the
// correct result modulo 2**256. Since the precoditions guarantee
// that the outcome is less than 2**256, this is the final result.
// We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inv;
return result;
}
/// @notice Calculates ceil(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
/// @param a The multiplicand
/// @param b The multiplier
/// @param denominator The divisor
/// @return result The 256-bit result
function mulDivRoundingUp(
uint256 a,
uint256 b,
uint256 denominator
) internal pure returns (uint256 result) {
result = mulDiv(a, b, denominator);
if (mulmod(a, b, denominator) > 0) {
require(result < type(uint256).max);
result++;
}
}
}
pragma solidity >=0.5.0;
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.4.0;
// computes square roots using the babylonian method
// https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method
library Babylonian {
// credit for this implementation goes to
// https://github.com/abdk-consulting/abdk-libraries-solidity/blob/master/ABDKMath64x64.sol#L687
function sqrt(uint256 x) internal pure returns (uint256) {
if (x == 0) return 0;
// this block is equivalent to r = uint256(1) << (BitMath.mostSignificantBit(x) / 2);
// however that code costs significantly more gas
uint256 xx = x;
uint256 r = 1;
if (xx >= 0x100000000000000000000000000000000) {
xx >>= 128;
r <<= 64;
}
if (xx >= 0x10000000000000000) {
xx >>= 64;
r <<= 32;
}
if (xx >= 0x100000000) {
xx >>= 32;
r <<= 16;
}
if (xx >= 0x10000) {
xx >>= 16;
r <<= 8;
}
if (xx >= 0x100) {
xx >>= 8;
r <<= 4;
}
if (xx >= 0x10) {
xx >>= 4;
r <<= 2;
}
if (xx >= 0x8) {
r <<= 1;
}
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1; // Seven iterations should be enough
uint256 r1 = x / r;
return (r < r1 ? r : r1);
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity >=0.6.0;
// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
function safeApprove(
address token,
address to,
uint256 value
) internal {
// bytes4(keccak256(bytes('approve(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
require(
success && (data.length == 0 || abi.decode(data, (bool))),
'TransferHelper::safeApprove: approve failed'
);
}
function safeTransfer(
address token,
address to,
uint256 value
) internal {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
require(
success && (data.length == 0 || abi.decode(data, (bool))),
'TransferHelper::safeTransfer: transfer failed'
);
}
function safeTransferFrom(
address token,
address from,
address to,
uint256 value
) internal {
// bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
require(
success && (data.length == 0 || abi.decode(data, (bool))),
'TransferHelper::transferFrom: transferFrom failed'
);
}
function safeTransferETH(address to, uint256 value) internal {
(bool success, ) = to.call{value: value}(new bytes(0));
require(success, 'TransferHelper::safeTransferETH: ETH transfer failed');
}
}
pragma solidity >=0.6.2;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@uniswap/lib/contracts/libraries/TransferHelper.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol";
import "../../common/implementation/FixedPoint.sol";
/**
* @title ReserveCurrencyLiquidator
* @notice Helper contract to enable a liquidator to hold one reserver currency and liquidate against any number of
* financial contracts. Is assumed to be called by a DSProxy which holds reserve currency.
*/
contract ReserveCurrencyLiquidator {
using SafeMath for uint256;
using FixedPoint for FixedPoint.Unsigned;
/**
* @notice Swaps required amount of reserve currency to collateral currency which is then used to mint tokens to
* liquidate a position within one transaction.
* @dev After the liquidation is done the DSProxy that called this method will have an open position AND pending
* liquidation within the financial contract. The bot using the DSProxy should withdraw the liquidation once it has
* passed liveness. At this point the position can be manually unwound.
* @dev Any synthetics & collateral that the DSProxy already has are considered in the amount swapped and minted.
* These existing tokens will be used first before any swaps or mints are done.
* @dev If there is a token shortfall (either from not enough reserve to buy sufficient collateral or not enough
* collateral to begins with or due to slippage) the script will liquidate as much as possible given the reserves.
* @param uniswapRouter address of the uniswap router used to facilitate trades.
* @param financialContract address of the financial contract on which the liquidation is occurring.
* @param reserveCurrency address of the token to swap for collateral. THis is the common currency held by the DSProxy.
* @param liquidatedSponsor address of the sponsor to be liquidated.
* @param maxReserveTokenSpent maximum number of reserve tokens to spend in the trade. Bounds slippage.
* @param minCollateralPerTokenLiquidated abort the liquidation if the position's collateral per token is below this value.
* @param maxCollateralPerTokenLiquidated abort the liquidation if the position's collateral per token exceeds this value.
* @param maxTokensToLiquidate max number of tokens to liquidate. For a full liquidation this is the full position debt.
* @param deadline abort the trade and liquidation if the transaction is mined after this timestamp.
**/
function swapMintLiquidate(
address uniswapRouter,
address financialContract,
address reserveCurrency,
address liquidatedSponsor,
FixedPoint.Unsigned calldata maxReserveTokenSpent,
FixedPoint.Unsigned calldata minCollateralPerTokenLiquidated,
FixedPoint.Unsigned calldata maxCollateralPerTokenLiquidated,
FixedPoint.Unsigned calldata maxTokensToLiquidate,
uint256 deadline
) public {
IFinancialContract fc = IFinancialContract(financialContract);
// 1. Calculate the token shortfall. This is the synthetics to liquidate minus any synthetics the DSProxy already
// has. If this number is negative(balance large than synthetics to liquidate) the return 0 (no shortfall).
FixedPoint.Unsigned memory tokenShortfall = subOrZero(maxTokensToLiquidate, getSyntheticBalance(fc));
// 2. Calculate how much collateral is needed to make up the token shortfall from minting new synthetics.
FixedPoint.Unsigned memory gcr = fc.pfc().divCeil(fc.totalTokensOutstanding());
FixedPoint.Unsigned memory collateralToMintShortfall = tokenShortfall.mulCeil(gcr);
// 3. Calculate the total collateral required. This considers the final fee for the given collateral type + any
// collateral needed to mint the token short fall.
FixedPoint.Unsigned memory totalCollateralRequired = getFinalFee(fc).add(collateralToMintShortfall);
// 4.a. Calculate how much collateral needs to be purchased. If the DSProxy already has some collateral then this
// will factor this in. If the DSProxy has more collateral than the total amount required the purchased = 0.
FixedPoint.Unsigned memory collateralToBePurchased =
subOrZero(totalCollateralRequired, getCollateralBalance(fc));
// 4.b. If there is some collateral to be purchased, execute a trade on uniswap to meet the shortfall.
// Note the path assumes a direct route from the reserve currency to the collateral currency.
if (collateralToBePurchased.isGreaterThan(0) && reserveCurrency != fc.collateralCurrency()) {
IUniswapV2Router01 router = IUniswapV2Router01(uniswapRouter);
address[] memory path = new address[](2);
path[0] = reserveCurrency;
path[1] = fc.collateralCurrency();
TransferHelper.safeApprove(reserveCurrency, address(router), maxReserveTokenSpent.rawValue);
router.swapTokensForExactTokens(
collateralToBePurchased.rawValue,
maxReserveTokenSpent.rawValue,
path,
address(this),
deadline
);
}
// 4.c. If at this point we were not able to get the required amount of collateral (due to insufficient reserve
// or not enough collateral in the contract) the script should try to liquidate as much as it can regardless.
// Update the values of total collateral to the current collateral balance and re-compute the tokenShortfall
// as the maximum tokens that could be liquidated at the current GCR.
if (totalCollateralRequired.isGreaterThan(getCollateralBalance(fc))) {
totalCollateralRequired = getCollateralBalance(fc);
collateralToMintShortfall = totalCollateralRequired.sub(getFinalFee(fc));
tokenShortfall = collateralToMintShortfall.divCeil(gcr);
}
// 5. Mint the shortfall synthetics with collateral. Note we are minting at the GCR.
// If the DSProxy already has enough tokens (tokenShortfall = 0) we still preform the approval on the collateral
// currency as this is needed to pay the final fee in the liquidation tx.
TransferHelper.safeApprove(fc.collateralCurrency(), address(fc), totalCollateralRequired.rawValue);
if (tokenShortfall.isGreaterThan(0)) fc.create(collateralToMintShortfall, tokenShortfall);
// The liquidatableTokens is either the maxTokensToLiquidate (if we were able to buy/mint enough) or the full
// token token balance at this point if there was a shortfall.
FixedPoint.Unsigned memory liquidatableTokens = maxTokensToLiquidate;
if (maxTokensToLiquidate.isGreaterThan(getSyntheticBalance(fc))) liquidatableTokens = getSyntheticBalance(fc);
// 6. Liquidate position with newly minted synthetics.
TransferHelper.safeApprove(fc.tokenCurrency(), address(fc), liquidatableTokens.rawValue);
fc.createLiquidation(
liquidatedSponsor,
minCollateralPerTokenLiquidated,
maxCollateralPerTokenLiquidated,
liquidatableTokens,
deadline
);
}
// Helper method to work around subtraction overflow in the case of: a - b with b > a.
function subOrZero(FixedPoint.Unsigned memory a, FixedPoint.Unsigned memory b)
internal
pure
returns (FixedPoint.Unsigned memory)
{
return b.isGreaterThanOrEqual(a) ? FixedPoint.fromUnscaledUint(0) : a.sub(b);
}
// Helper method to return the current final fee for a given financial contract instance.
function getFinalFee(IFinancialContract fc) internal returns (FixedPoint.Unsigned memory) {
return IStore(IFinder(fc.finder()).getImplementationAddress("Store")).computeFinalFee(fc.collateralCurrency());
}
// Helper method to return the collateral balance of this contract.
function getCollateralBalance(IFinancialContract fc) internal returns (FixedPoint.Unsigned memory) {
return FixedPoint.Unsigned(IERC20(fc.collateralCurrency()).balanceOf(address(this)));
}
// Helper method to return the synthetic balance of this contract.
function getSyntheticBalance(IFinancialContract fc) internal returns (FixedPoint.Unsigned memory) {
return FixedPoint.Unsigned(IERC20(fc.tokenCurrency()).balanceOf(address(this)));
}
}
// Define some simple interfaces for dealing with UMA contracts.
interface IFinancialContract {
struct PositionData {
FixedPoint.Unsigned tokensOutstanding;
uint256 withdrawalRequestPassTimestamp;
FixedPoint.Unsigned withdrawalRequestAmount;
FixedPoint.Unsigned rawCollateral;
uint256 transferPositionRequestPassTimestamp;
}
function positions(address sponsor) external returns (PositionData memory);
function collateralCurrency() external returns (address);
function tokenCurrency() external returns (address);
function finder() external returns (address);
function pfc() external returns (FixedPoint.Unsigned memory);
function totalTokensOutstanding() external returns (FixedPoint.Unsigned memory);
function create(FixedPoint.Unsigned memory collateralAmount, FixedPoint.Unsigned memory numTokens) external;
function createLiquidation(
address sponsor,
FixedPoint.Unsigned calldata minCollateralPerToken,
FixedPoint.Unsigned calldata maxCollateralPerToken,
FixedPoint.Unsigned calldata maxTokensToLiquidate,
uint256 deadline
)
external
returns (
uint256 liquidationId,
FixedPoint.Unsigned memory tokensLiquidated,
FixedPoint.Unsigned memory finalFeeBond
);
}
interface IStore {
function computeFinalFee(address currency) external returns (FixedPoint.Unsigned memory);
}
interface IFinder {
function getImplementationAddress(bytes32 interfaceName) external view returns (address);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/FixedPoint.sol";
import "@uniswap/lib/contracts/libraries/TransferHelper.sol";
// Simple contract used to redeem tokens using a DSProxy from an emp.
contract TokenRedeemer {
function redeem(address financialContractAddress, FixedPoint.Unsigned memory numTokens)
public
returns (FixedPoint.Unsigned memory)
{
IFinancialContract fc = IFinancialContract(financialContractAddress);
TransferHelper.safeApprove(fc.tokenCurrency(), financialContractAddress, numTokens.rawValue);
return fc.redeem(numTokens);
}
}
interface IFinancialContract {
function redeem(FixedPoint.Unsigned memory numTokens) external returns (FixedPoint.Unsigned memory amountWithdrawn);
function tokenCurrency() external returns (address);
}
/*
MultiRoleTest contract.
*/
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../implementation/MultiRole.sol";
// The purpose of this contract is to make the MultiRole creation methods externally callable for testing purposes.
contract MultiRoleTest is MultiRole {
function createSharedRole(
uint256 roleId,
uint256 managingRoleId,
address[] calldata initialMembers
) external {
_createSharedRole(roleId, managingRoleId, initialMembers);
}
function createExclusiveRole(
uint256 roleId,
uint256 managingRoleId,
address initialMember
) external {
_createExclusiveRole(roleId, managingRoleId, initialMember);
}
// solhint-disable-next-line no-empty-blocks
function revertIfNotHoldingRole(uint256 roleId) external view onlyRoleHolder(roleId) {}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../implementation/Testable.sol";
// TestableTest is derived from the abstract contract Testable for testing purposes.
contract TestableTest is Testable {
// solhint-disable-next-line no-empty-blocks
constructor(address _timerAddress) Testable(_timerAddress) {}
function getTestableTimeAndBlockTime() external view returns (uint256 testableTime, uint256 blockTime) {
// solhint-disable-next-line not-rely-on-time
return (getCurrentTime(), block.timestamp);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../interfaces/VaultInterface.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
* @title Mock for yearn-style vaults for use in tests.
*/
contract VaultMock is VaultInterface {
IERC20 public override token;
uint256 private pricePerFullShare = 0;
constructor(IERC20 _token) {
token = _token;
}
function getPricePerFullShare() external view override returns (uint256) {
return pricePerFullShare;
}
function setPricePerFullShare(uint256 _pricePerFullShare) external {
pricePerFullShare = _pricePerFullShare;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
* @title Interface for Yearn-style vaults.
* @dev This only contains the methods/events that we use in our contracts or offchain infrastructure.
*/
abstract contract VaultInterface {
// Return the underlying token.
function token() external view virtual returns (IERC20);
// Gets the number of return tokens that a "share" of this vault is worth.
function getPricePerFullShare() external view virtual returns (uint256);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
* @title Implements only the required ERC20 methods. This contract is used
* test how contracts handle ERC20 contracts that have not implemented `decimals()`
* @dev Mostly copied from Consensys EIP-20 implementation:
* https://github.com/ConsenSys/Tokens/blob/fdf687c69d998266a95f15216b1955a4965a0a6d/contracts/eip20/EIP20.sol
*/
contract BasicERC20 is IERC20 {
uint256 private constant MAX_UINT256 = 2**256 - 1;
mapping(address => uint256) public balances;
mapping(address => mapping(address => uint256)) public allowed;
uint256 private _totalSupply;
constructor(uint256 _initialAmount) {
balances[msg.sender] = _initialAmount;
_totalSupply = _initialAmount;
}
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
function transfer(address _to, uint256 _value) public override returns (bool success) {
require(balances[msg.sender] >= _value);
balances[msg.sender] -= _value;
balances[_to] += _value;
emit Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(
address _from,
address _to,
uint256 _value
) public override returns (bool success) {
uint256 allowance = allowed[_from][msg.sender];
require(balances[_from] >= _value && allowance >= _value);
balances[_to] += _value;
balances[_from] -= _value;
if (allowance < MAX_UINT256) {
allowed[_from][msg.sender] -= _value;
}
emit Transfer(_from, _to, _value); //solhint-disable-line indent, no-unused-vars
return true;
}
function balanceOf(address _owner) public view override returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) public override returns (bool success) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value); //solhint-disable-line indent, no-unused-vars
return true;
}
function allowance(address _owner, address _spender) public view override returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../ResultComputation.sol";
import "../../../common/implementation/FixedPoint.sol";
// Wraps the library ResultComputation for testing purposes.
contract ResultComputationTest {
using ResultComputation for ResultComputation.Data;
ResultComputation.Data public data;
function wrapAddVote(int256 votePrice, uint256 numberTokens) external {
data.addVote(votePrice, FixedPoint.Unsigned(numberTokens));
}
function wrapGetResolvedPrice(uint256 minVoteThreshold) external view returns (bool isResolved, int256 price) {
return data.getResolvedPrice(FixedPoint.Unsigned(minVoteThreshold));
}
function wrapWasVoteCorrect(bytes32 revealHash) external view returns (bool) {
return data.wasVoteCorrect(revealHash);
}
function wrapGetTotalCorrectlyVotedTokens() external view returns (uint256) {
return data.getTotalCorrectlyVotedTokens().rawValue;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../Voting.sol";
import "../../../common/implementation/FixedPoint.sol";
// Test contract used to access internal variables in the Voting contract.
contract VotingTest is Voting {
constructor(
uint256 _phaseLength,
FixedPoint.Unsigned memory _gatPercentage,
FixedPoint.Unsigned memory _inflationRate,
uint256 _rewardsExpirationTimeout,
address _votingToken,
address _finder,
address _timerAddress
)
Voting(
_phaseLength,
_gatPercentage,
_inflationRate,
_rewardsExpirationTimeout,
_votingToken,
_finder,
_timerAddress
)
{}
function getPendingPriceRequestsArray() external view returns (bytes32[] memory) {
return pendingPriceRequests;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../implementation/FixedPoint.sol";
// Wraps the FixedPoint library for testing purposes.
contract UnsignedFixedPointTest {
using FixedPoint for FixedPoint.Unsigned;
using FixedPoint for uint256;
using SafeMath for uint256;
function wrapFromUnscaledUint(uint256 a) external pure returns (uint256) {
return FixedPoint.fromUnscaledUint(a).rawValue;
}
function wrapIsEqual(uint256 a, uint256 b) external pure returns (bool) {
return FixedPoint.Unsigned(a).isEqual(FixedPoint.Unsigned(b));
}
function wrapMixedIsEqual(uint256 a, uint256 b) external pure returns (bool) {
return FixedPoint.Unsigned(a).isEqual(b);
}
function wrapIsGreaterThan(uint256 a, uint256 b) external pure returns (bool) {
return FixedPoint.Unsigned(a).isGreaterThan(FixedPoint.Unsigned(b));
}
function wrapIsGreaterThanOrEqual(uint256 a, uint256 b) external pure returns (bool) {
return FixedPoint.Unsigned(a).isGreaterThanOrEqual(FixedPoint.Unsigned(b));
}
function wrapMixedIsGreaterThan(uint256 a, uint256 b) external pure returns (bool) {
return FixedPoint.Unsigned(a).isGreaterThan(b);
}
function wrapMixedIsGreaterThanOrEqual(uint256 a, uint256 b) external pure returns (bool) {
return FixedPoint.Unsigned(a).isGreaterThanOrEqual(b);
}
function wrapMixedIsGreaterThanOpposite(uint256 a, uint256 b) external pure returns (bool) {
return a.isGreaterThan(FixedPoint.Unsigned(b));
}
function wrapMixedIsGreaterThanOrEqualOpposite(uint256 a, uint256 b) external pure returns (bool) {
return a.isGreaterThanOrEqual(FixedPoint.Unsigned(b));
}
function wrapIsLessThan(uint256 a, uint256 b) external pure returns (bool) {
return FixedPoint.Unsigned(a).isLessThan(FixedPoint.Unsigned(b));
}
function wrapIsLessThanOrEqual(uint256 a, uint256 b) external pure returns (bool) {
return FixedPoint.Unsigned(a).isLessThanOrEqual(FixedPoint.Unsigned(b));
}
function wrapMixedIsLessThan(uint256 a, uint256 b) external pure returns (bool) {
return FixedPoint.Unsigned(a).isLessThan(b);
}
function wrapMixedIsLessThanOrEqual(uint256 a, uint256 b) external pure returns (bool) {
return FixedPoint.Unsigned(a).isLessThanOrEqual(b);
}
function wrapMixedIsLessThanOpposite(uint256 a, uint256 b) external pure returns (bool) {
return a.isLessThan(FixedPoint.Unsigned(b));
}
function wrapMixedIsLessThanOrEqualOpposite(uint256 a, uint256 b) external pure returns (bool) {
return a.isLessThanOrEqual(FixedPoint.Unsigned(b));
}
function wrapMin(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).min(FixedPoint.Unsigned(b)).rawValue;
}
function wrapMax(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).max(FixedPoint.Unsigned(b)).rawValue;
}
function wrapAdd(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).add(FixedPoint.Unsigned(b)).rawValue;
}
// The first uint256 is interpreted with a scaling factor and is converted to an `Unsigned` directly.
function wrapMixedAdd(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).add(b).rawValue;
}
function wrapSub(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).sub(FixedPoint.Unsigned(b)).rawValue;
}
// The first uint256 is interpreted with a scaling factor and is converted to an `Unsigned` directly.
function wrapMixedSub(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).sub(b).rawValue;
}
// The second uint256 is interpreted with a scaling factor and is converted to an `Unsigned` directly.
function wrapMixedSubOpposite(uint256 a, uint256 b) external pure returns (uint256) {
return a.sub(FixedPoint.Unsigned(b)).rawValue;
}
function wrapMul(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).mul(FixedPoint.Unsigned(b)).rawValue;
}
function wrapMulCeil(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).mulCeil(FixedPoint.Unsigned(b)).rawValue;
}
// The first uint256 is interpreted with a scaling factor and is converted to an `Unsigned` directly.
function wrapMixedMul(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).mul(b).rawValue;
}
function wrapMixedMulCeil(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).mulCeil(b).rawValue;
}
function wrapDiv(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).div(FixedPoint.Unsigned(b)).rawValue;
}
function wrapDivCeil(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).divCeil(FixedPoint.Unsigned(b)).rawValue;
}
// The first uint256 is interpreted with a scaling factor and is converted to an `Unsigned` directly.
function wrapMixedDiv(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).div(b).rawValue;
}
function wrapMixedDivCeil(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).divCeil(b).rawValue;
}
// The second uint256 is interpreted with a scaling factor and is converted to an `Unsigned` directly.
function wrapMixedDivOpposite(uint256 a, uint256 b) external pure returns (uint256) {
return a.div(FixedPoint.Unsigned(b)).rawValue;
}
// The first uint256 is interpreted with a scaling factor and is converted to an `Unsigned` directly.
function wrapPow(uint256 a, uint256 b) external pure returns (uint256) {
return FixedPoint.Unsigned(a).pow(b).rawValue;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
import "../implementation/FixedPoint.sol";
// Wraps the FixedPoint library for testing purposes.
contract SignedFixedPointTest {
using FixedPoint for FixedPoint.Signed;
using FixedPoint for int256;
using SafeMath for int256;
function wrapFromSigned(int256 a) external pure returns (uint256) {
return FixedPoint.fromSigned(FixedPoint.Signed(a)).rawValue;
}
function wrapFromUnsigned(uint256 a) external pure returns (int256) {
return FixedPoint.fromUnsigned(FixedPoint.Unsigned(a)).rawValue;
}
function wrapFromUnscaledInt(int256 a) external pure returns (int256) {
return FixedPoint.fromUnscaledInt(a).rawValue;
}
function wrapIsEqual(int256 a, int256 b) external pure returns (bool) {
return FixedPoint.Signed(a).isEqual(FixedPoint.Signed(b));
}
function wrapMixedIsEqual(int256 a, int256 b) external pure returns (bool) {
return FixedPoint.Signed(a).isEqual(b);
}
function wrapIsGreaterThan(int256 a, int256 b) external pure returns (bool) {
return FixedPoint.Signed(a).isGreaterThan(FixedPoint.Signed(b));
}
function wrapIsGreaterThanOrEqual(int256 a, int256 b) external pure returns (bool) {
return FixedPoint.Signed(a).isGreaterThanOrEqual(FixedPoint.Signed(b));
}
function wrapMixedIsGreaterThan(int256 a, int256 b) external pure returns (bool) {
return FixedPoint.Signed(a).isGreaterThan(b);
}
function wrapMixedIsGreaterThanOrEqual(int256 a, int256 b) external pure returns (bool) {
return FixedPoint.Signed(a).isGreaterThanOrEqual(b);
}
function wrapMixedIsGreaterThanOpposite(int256 a, int256 b) external pure returns (bool) {
return a.isGreaterThan(FixedPoint.Signed(b));
}
function wrapMixedIsGreaterThanOrEqualOpposite(int256 a, int256 b) external pure returns (bool) {
return a.isGreaterThanOrEqual(FixedPoint.Signed(b));
}
function wrapIsLessThan(int256 a, int256 b) external pure returns (bool) {
return FixedPoint.Signed(a).isLessThan(FixedPoint.Signed(b));
}
function wrapIsLessThanOrEqual(int256 a, int256 b) external pure returns (bool) {
return FixedPoint.Signed(a).isLessThanOrEqual(FixedPoint.Signed(b));
}
function wrapMixedIsLessThan(int256 a, int256 b) external pure returns (bool) {
return FixedPoint.Signed(a).isLessThan(b);
}
function wrapMixedIsLessThanOrEqual(int256 a, int256 b) external pure returns (bool) {
return FixedPoint.Signed(a).isLessThanOrEqual(b);
}
function wrapMixedIsLessThanOpposite(int256 a, int256 b) external pure returns (bool) {
return a.isLessThan(FixedPoint.Signed(b));
}
function wrapMixedIsLessThanOrEqualOpposite(int256 a, int256 b) external pure returns (bool) {
return a.isLessThanOrEqual(FixedPoint.Signed(b));
}
function wrapMin(int256 a, int256 b) external pure returns (int256) {
return FixedPoint.Signed(a).min(FixedPoint.Signed(b)).rawValue;
}
function wrapMax(int256 a, int256 b) external pure returns (int256) {
return FixedPoint.Signed(a).max(FixedPoint.Signed(b)).rawValue;
}
function wrapAdd(int256 a, int256 b) external pure returns (int256) {
return FixedPoint.Signed(a).add(FixedPoint.Signed(b)).rawValue;
}
// The first int256 is interpreted with a scaling factor and is converted to an `Unsigned` directly.
function wrapMixedAdd(int256 a, int256 b) external pure returns (int256) {
return FixedPoint.Signed(a).add(b).rawValue;
}
function wrapSub(int256 a, int256 b) external pure returns (int256) {
return FixedPoint.Signed(a).sub(FixedPoint.Signed(b)).rawValue;
}
// The first int256 is interpreted with a scaling factor and is converted to an `Unsigned` directly.
function wrapMixedSub(int256 a, int256 b) external pure returns (int256) {
return FixedPoint.Signed(a).sub(b).rawValue;
}
// The second int256 is interpreted with a scaling factor and is converted to an `Unsigned` directly.
function wrapMixedSubOpposite(int256 a, int256 b) external pure returns (int256) {
return a.sub(FixedPoint.Signed(b)).rawValue;
}
function wrapMul(int256 a, int256 b) external pure returns (int256) {
return FixedPoint.Signed(a).mul(FixedPoint.Signed(b)).rawValue;
}
function wrapMulAwayFromZero(int256 a, int256 b) external pure returns (int256) {
return FixedPoint.Signed(a).mulAwayFromZero(FixedPoint.Signed(b)).rawValue;
}
// The first int256 is interpreted with a scaling factor and is converted to an `Unsigned` directly.
function wrapMixedMul(int256 a, int256 b) external pure returns (int256) {
return FixedPoint.Signed(a).mul(b).rawValue;
}
function wrapMixedMulAwayFromZero(int256 a, int256 b) external pure returns (int256) {
return FixedPoint.Signed(a).mulAwayFromZero(b).rawValue;
}
function wrapDiv(int256 a, int256 b) external pure returns (int256) {
return FixedPoint.Signed(a).div(FixedPoint.Signed(b)).rawValue;
}
function wrapDivAwayFromZero(int256 a, int256 b) external pure returns (int256) {
return FixedPoint.Signed(a).divAwayFromZero(FixedPoint.Signed(b)).rawValue;
}
// The first int256 is interpreted with a scaling factor and is converted to an `Unsigned` directly.
function wrapMixedDiv(int256 a, int256 b) external pure returns (int256) {
return FixedPoint.Signed(a).div(b).rawValue;
}
function wrapMixedDivAwayFromZero(int256 a, int256 b) external pure returns (int256) {
return FixedPoint.Signed(a).divAwayFromZero(b).rawValue;
}
// The second int256 is interpreted with a scaling factor and is converted to an `Unsigned` directly.
function wrapMixedDivOpposite(int256 a, int256 b) external pure returns (int256) {
return a.div(FixedPoint.Signed(b)).rawValue;
}
// The first int256 is interpreted with a scaling factor and is converted to an `Unsigned` directly.
function wrapPow(int256 a, uint256 b) external pure returns (int256) {
return FixedPoint.Signed(a).pow(b).rawValue;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.0;
pragma abicoder v2;
import "../../common/implementation/FixedPoint.sol";
/**
* @title Simple Perpetual Mock to serve trivial functions
*/
contract PerpetualMock {
struct FundingRate {
FixedPoint.Signed rate;
bytes32 identifier;
FixedPoint.Unsigned cumulativeMultiplier;
uint256 updateTime;
uint256 applicationTime;
uint256 proposalTime;
}
using FixedPoint for FixedPoint.Unsigned;
using FixedPoint for FixedPoint.Signed;
FundingRate public fundingRate;
// Interface functions required to be implemented in order for an instance of this contract to be passed into the
// off-chain FinancialContractClient helper module:
FixedPoint.Unsigned public collateralRequirement;
uint256 public liquidationLiveness;
FixedPoint.Unsigned public cumulativeFeeMultiplier;
mapping(address => uint256) public positions;
mapping(address => uint256) public liquidations;
event NewSponsor(address indexed sponsor);
event EndedSponsorPosition();
event LiquidationCreated();
function getCurrentTime() public view returns (uint256) {
return block.timestamp;
}
// Public methods that are useful for tests:
function setFundingRate(FundingRate memory _fundingRate) external {
fundingRate = _fundingRate;
}
function applyFundingRate() external {
fundingRate.applicationTime = block.timestamp;
// Simplified rate calcualtion.
// multiplier = multiplier * (1 + rate)
fundingRate.cumulativeMultiplier = fundingRate.cumulativeMultiplier.mul(
FixedPoint.fromSigned(FixedPoint.fromUnscaledInt(1).add(fundingRate.rate))
);
}
}
| GovernorTest exposes internal methods in the Governor for testing. | contract GovernorTest is Governor {
function addPrefix(
bytes32 input,
bytes32 prefix,
uint256 prefixLength
pragma solidity ^0.8.0;
constructor(address _timerAddress) Governor(address(0), 0, _timerAddress) {}
) external pure returns (bytes32) {
return _addPrefix(input, prefix, prefixLength);
}
function uintToUtf8(uint256 v) external pure returns (bytes32 ret) {
return _uintToUtf8(v);
}
function constructIdentifier(uint256 id) external pure returns (bytes32 identifier) {
return _constructIdentifier(id);
}
}
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./full_match/80001/0xe04b01412500CF0515A29D389A4AcB84A944f675/sources/contracts/Tan.sol | * @dev Creates `amount` tokens and assigns them to `account`, increasing the total supply. Emits a {Transfer} event with `from` set to the zero address. Requirements - `to` cannot be the zero address./ | function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "TAN: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
require(_currentSupply.add(amount) < _totalSupply);
_currentSupply = _currentSupply.add(amount);
emit Transfer(address(0), account, amount);
}
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./full_match/80001/0x2085aC8a9De1684D9Da5fe5d40Fb2F388965B6e6/sources/contracts/RoboNounsVRGDA.sol | @notice Time of sale of the first RoboNoun, used to calculate VRGDA price @notice How often the VRGDA price will update to reflect VRGDA pricing rules @notice the last block at which the last roboNoun was sold @notice The minimum price accepted in an auction @notice The Nouns ERC721 token contract @notice Target price for a token, to be scaled according to sales pace. @dev Represented as an 18 decimal fixed point number. @dev Precomputed constant that allows us to rewrite a pow() as an exp(). @dev Represented as an 18 decimal fixed point number. @dev The total number of tokens to target selling every full unit of time. @dev Represented as an 18 decimal fixed point number. | ) {
decayConstant = wadLn(1e18 - _priceDecayPercent);
require(decayConstant < 0, "NON_NEGATIVE_DECAY_CONSTANT");
roboNounsToken = RoboNounsToken(_token);
startTime = block.timestamp;
reservePrice = _reservePrice;
targetPrice = _targetPrice;
perTimeUnit = _perTimeUnit;
updateInterval = _updateInterval;
}
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./full_match/1/0x1e3778Dd6dBfDc1C5B89f95F7C098B21e80eC4FA/sources/contracts/VICToken.sol | * @dev Transfers are optionally transfer taxed. If `from` or `to` is tax exempt, no tax is applied. The transfer tax rate cannot exceed the maximum tax rate. If neither `from` nor `to` is tax exempt, the transfer is subject to a transfer tax, which is calculated as `amount` multiplied by `transferTaxRate` and divided by 10,000. The tax amount is transferred to the `feeReceiver` account./ | function _transfer(address from, address to, uint256 amount) internal virtual override {
uint256 taxAmount;
TaxStatus fromStatus = status[from];
TaxStatus toStatus = status[to];
if (fromStatus != TaxStatus.EXEMPT && toStatus != TaxStatus.EXEMPT) {
if (fromStatus == TaxStatus.TAXED || toStatus == TaxStatus.TAXED) {
taxAmount = (amount * transferTaxRate) / 10000;
}
}
if (taxAmount > 0) {
amount -= taxAmount;
super._transfer(from, feeReceiver, taxAmount);
}
super._transfer(from, to, amount);
}
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] |
// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.7.6;
pragma abicoder v2;
import "@openzeppelin/contracts-upgradeable/proxy/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/PausableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "./libraries/ABDKMath64x64.sol";
import "./libraries/Utils.sol";
import "./libraries/UniswapLibrary.sol";
import "./BlockLock.sol";
import "./interfaces/IxTokenManager.sol";
contract xU3LPStable is
Initializable,
ERC20Upgradeable,
OwnableUpgradeable,
PausableUpgradeable,
BlockLock
{
using SafeMath for uint256;
using SafeERC20 for IERC20;
uint256 private constant LIQUIDATION_TIME_PERIOD = 4 weeks;
uint256 private constant INITIAL_SUPPLY_MULTIPLIER = 1;
uint256 private constant BUFFER_TARGET = 20; // 5% target
uint256 private constant SWAP_SLIPPAGE = 100; // 1%
uint256 private constant MINT_BURN_SLIPPAGE = 100; // 1%
uint24 private constant POOL_FEE = 500;
// Used to give an identical token representation
uint8 private constant TOKEN_DECIMAL_REPRESENTATION = 18;
int24 tickLower;
int24 tickUpper;
// Prices calculated using above ticks from TickMath.getSqrtRatioAtTick()
uint160 priceLower;
uint160 priceUpper;
int128 lastTwap; // Last stored oracle twap
// Max current twap vs last twap deviation percentage divisor (100 = 1%)
uint256 maxTwapDeviationDivisor;
IERC20 token0;
IERC20 token1;
address public poolAddress;
address public routerAddress;
address public positionManagerAddress;
uint256 public adminActiveTimestamp;
uint256 public withdrawableToken0Fees;
uint256 public withdrawableToken1Fees;
uint256 public tokenId; // token id representing this uniswap position
uint256 public token0DecimalMultiplier; // 10 ** (18 - token0 decimals)
uint256 public token1DecimalMultiplier; // 10 ** (18 - token1 decimals)
uint256 public tokenDiffDecimalMultiplier; // 10 ** (token0 decimals - token1 decimals)
uint8 public token0Decimals;
uint8 public token1Decimals;
address private manager;
address private manager2;
struct FeeDivisors {
uint256 mintFee;
uint256 burnFee;
uint256 claimFee;
}
FeeDivisors public feeDivisors;
uint32 twapPeriod;
IxTokenManager xTokenManager; // xToken manager contract
event Rebalance();
event FeeDivisorsSet(uint256 mintFee, uint256 burnFee, uint256 claimFee);
event FeeWithdraw(uint256 token0Fee, uint256 token1Fee);
event FeeCollected(uint256 token0Fee, uint256 token1Fee);
function initialize(
string memory _symbol,
int24 _tickLower,
int24 _tickUpper,
IERC20 _token0,
IERC20 _token1,
address _pool,
address _router,
address _positionManager,
FeeDivisors memory _feeDivisors,
uint256 _maxTwapDeviationDivisor,
uint8 _token0Decimals,
uint8 _token1Decimals
) external initializer {
__Context_init_unchained();
__Ownable_init_unchained();
__Pausable_init_unchained();
__ERC20_init_unchained("xU3LP", _symbol);
tickLower = _tickLower;
tickUpper = _tickUpper;
priceLower = UniswapLibrary.getSqrtRatio(_tickLower);
priceUpper = UniswapLibrary.getSqrtRatio(_tickUpper);
if (_token0 > _token1) {
token0 = _token1;
token1 = _token0;
token0Decimals = _token1Decimals;
token1Decimals = _token0Decimals;
} else {
token0 = _token0;
token1 = _token1;
token0Decimals = _token0Decimals;
token1Decimals = _token1Decimals;
}
token0DecimalMultiplier =
10**(TOKEN_DECIMAL_REPRESENTATION - token0Decimals);
token1DecimalMultiplier =
10**(TOKEN_DECIMAL_REPRESENTATION - token1Decimals);
tokenDiffDecimalMultiplier =
10**((Utils.subAbs(token0Decimals, token1Decimals)));
maxTwapDeviationDivisor = _maxTwapDeviationDivisor;
poolAddress = _pool;
routerAddress = _router;
positionManagerAddress = _positionManager;
token0.safeIncreaseAllowance(_router, type(uint256).max);
token1.safeIncreaseAllowance(_router, type(uint256).max);
token0.safeIncreaseAllowance(_positionManager, type(uint256).max);
token1.safeIncreaseAllowance(_positionManager, type(uint256).max);
lastTwap = getAsset0Price();
_setFeeDivisors(_feeDivisors);
}
/* ========================================================================================= */
/* User-facing */
/* ========================================================================================= */
/**
* @dev Mint xU3LP tokens by sending *amount* of *inputAsset* tokens
*/
function mintWithToken(uint8 inputAsset, uint256 amount)
external
notLocked(msg.sender)
whenNotPaused()
{
require(amount > 0);
lock(msg.sender);
checkTwap();
if (inputAsset == 0) {
token0.safeTransferFrom(msg.sender, address(this), amount);
amount = getAmountInAsset1Terms(amount);
uint256 fee = Utils.calculateFee(amount, feeDivisors.mintFee);
_incrementWithdrawableToken0Fees(fee);
_mintInternal(getToken0AmountInWei(amount.sub(fee)));
} else {
token1.safeTransferFrom(msg.sender, address(this), amount);
uint256 fee = Utils.calculateFee(amount, feeDivisors.mintFee);
_incrementWithdrawableToken1Fees(fee);
_mintInternal(getToken1AmountInWei(amount.sub(fee)));
}
}
/**
* @dev Burn *amount* of xU3LP tokens to receive proportional
* amount of *outputAsset* tokens
*/
function burn(uint8 outputAsset, uint256 amount)
external
notLocked(msg.sender)
{
require(amount > 0);
lock(msg.sender);
checkTwap();
(uint256 bufferToken0Balance, uint256 bufferToken1Balance) =
getBufferTokenBalance();
uint256 nav = getNav();
uint256 proRataBalance;
if (outputAsset == 0) {
proRataBalance = (nav.mul(getAmountInAsset0Terms(amount))).div(
totalSupply()
);
require(
proRataBalance <= bufferToken0Balance,
"Insufficient exit liquidity"
);
} else {
proRataBalance = (nav.mul(amount).div(totalSupply()));
require(
proRataBalance <= bufferToken1Balance,
"Insufficient exit liquidity"
);
}
super._burn(msg.sender, amount);
// Fee is in wei (18 decimals, so doesn't need to be normalized)
uint256 fee = Utils.calculateFee(proRataBalance, feeDivisors.burnFee);
if (outputAsset == 0) {
withdrawableToken0Fees = withdrawableToken0Fees.add(fee);
uint256 transferAmount =
getToken0AmountInNativeDecimals(proRataBalance.sub(fee));
token0.safeTransfer(msg.sender, transferAmount);
} else {
withdrawableToken1Fees = withdrawableToken1Fees.add(fee);
uint256 transferAmount =
getToken1AmountInNativeDecimals(proRataBalance.sub(fee));
token1.safeTransfer(msg.sender, transferAmount);
}
}
function transfer(address recipient, uint256 amount)
public
override
notLocked(msg.sender)
returns (bool)
{
return super.transfer(recipient, amount);
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override notLocked(sender) returns (bool) {
return super.transferFrom(sender, recipient, amount);
}
/**
* @dev Get asset 0 twap
* @dev Uses Uni V3 oracle, reading the TWAP from twap period
* @dev or the earliest oracle observation time if twap period is not set
*/
function getAsset0Price() public view returns (int128) {
return
UniswapLibrary.getAsset0Price(
poolAddress,
twapPeriod,
token0Decimals,
token1Decimals,
tokenDiffDecimalMultiplier
);
}
/**
* @dev Get asset 1 twap
* @dev Uses Uni V3 oracle, reading the TWAP from twap period
* @dev or the earliest oracle observation time if twap period is not set
*/
function getAsset1Price() public view returns (int128) {
return
UniswapLibrary.getAsset1Price(
poolAddress,
twapPeriod,
token0Decimals,
token1Decimals,
tokenDiffDecimalMultiplier
);
}
/**
* @dev Returns amount in terms of asset 0
* @dev amount * asset 1 price
*/
function getAmountInAsset0Terms(uint256 amount)
public
view
returns (uint256)
{
return
UniswapLibrary.getAmountInAsset0Terms(
amount,
poolAddress,
twapPeriod,
token0Decimals,
token1Decimals,
tokenDiffDecimalMultiplier
);
}
/**
* @dev Returns amount in terms of asset 1
* @dev amount * asset 0 price
*/
function getAmountInAsset1Terms(uint256 amount)
public
view
returns (uint256)
{
return
UniswapLibrary.getAmountInAsset1Terms(
amount,
poolAddress,
twapPeriod,
token0Decimals,
token1Decimals,
tokenDiffDecimalMultiplier
);
}
// Get net asset value
function getNav() public view returns (uint256) {
return getStakedBalance().add(getBufferBalance());
}
// Get total balance in the position
function getStakedBalance() public view returns (uint256) {
(uint256 amount0, uint256 amount1) = getStakedTokenBalance();
return getAmountInAsset1Terms(amount0).add(amount1);
}
// Get balance in xU3LP contract
function getBufferBalance() public view returns (uint256) {
(uint256 balance0, uint256 balance1) = getBufferTokenBalance();
return getAmountInAsset1Terms(balance0).add(balance1);
}
// Get token balances in xU3LP contract
function getBufferTokenBalance()
public
view
returns (uint256 amount0, uint256 amount1)
{
return (getBufferToken0Balance(), getBufferToken1Balance());
}
function getBufferToken0Balance() public view returns (uint256 amount0) {
uint256 balance0 =
getToken0AmountInWei(token0.balanceOf(address(this)));
return Utils.sub0(balance0, withdrawableToken0Fees);
}
function getBufferToken1Balance() public view returns (uint256 amount1) {
uint256 balance1 =
getToken1AmountInWei(token1.balanceOf(address(this)));
return Utils.sub0(balance1, withdrawableToken1Fees);
}
// Get token balances in the position
function getStakedTokenBalance()
public
view
returns (uint256 amount0, uint256 amount1)
{
(amount0, amount1) = getAmountsForLiquidity(getPositionLiquidity());
amount0 = getToken0AmountInWei(amount0);
amount1 = getToken1AmountInWei(amount1);
}
// Get wanted xU3LP contract token balance - 5% of NAV
function getTargetBufferTokenBalance()
public
view
returns (uint256 amount0, uint256 amount1)
{
(uint256 bufferAmount0, uint256 bufferAmount1) =
getBufferTokenBalance();
(uint256 poolAmount0, uint256 poolAmount1) = getStakedTokenBalance();
amount0 = bufferAmount0.add(poolAmount0).div(BUFFER_TARGET);
amount1 = bufferAmount1.add(poolAmount1).div(BUFFER_TARGET);
// Keep 50:50 ratio
amount0 = amount0.add(amount1).div(2);
amount1 = amount0;
}
// Check how much xU3LP tokens will be minted
function calculateMintAmount(uint256 _amount, uint256 totalSupply)
public
view
returns (uint256 mintAmount)
{
if (totalSupply == 0) return _amount.mul(INITIAL_SUPPLY_MULTIPLIER);
uint256 previousNav = getNav().sub(_amount);
mintAmount = (_amount).mul(totalSupply).div(previousNav);
return mintAmount;
}
/* ========================================================================================= */
/* Management */
/* ========================================================================================= */
function rebalance() external onlyOwnerOrManager {
collect();
_rebalance();
_certifyAdmin();
}
function _rebalance() private {
_provideOrRemoveLiquidity();
emit Rebalance();
}
function _provideOrRemoveLiquidity() private {
checkTwap();
(uint256 bufferToken0Balance, uint256 bufferToken1Balance) =
getBufferTokenBalance();
(uint256 targetToken0Balance, uint256 targetToken1Balance) =
getTargetBufferTokenBalance();
uint256 bufferBalance = bufferToken0Balance.add(bufferToken1Balance);
uint256 targetBalance = targetToken0Balance.add(targetToken1Balance);
uint256 _amount0 =
Utils.subAbs(bufferToken0Balance, targetToken0Balance);
uint256 _amount1 =
Utils.subAbs(bufferToken1Balance, targetToken1Balance);
_amount0 = getToken0AmountInNativeDecimals(_amount0);
_amount1 = getToken1AmountInNativeDecimals(_amount1);
(uint256 amount0, uint256 amount1) =
checkIfAmountsMatchAndSwap(_amount0, _amount1);
if (amount0 == 0 || amount1 == 0) {
return;
}
if (bufferBalance > targetBalance) {
_stake(amount0, amount1);
} else if (bufferBalance < targetBalance) {
_unstake(amount0, amount1);
}
}
/**
* @dev Stake liquidity in position
*/
function _stake(uint256 amount0, uint256 amount1)
private
returns (uint256 stakedAmount0, uint256 stakedAmount1)
{
return
UniswapLibrary.stake(
amount0,
amount1,
positionManagerAddress,
tokenId
);
}
/**
* @dev Unstake liquidity from position
*/
function _unstake(uint256 amount0, uint256 amount1)
private
returns (uint256 collected0, uint256 collected1)
{
uint128 liquidityAmount = getLiquidityForAmounts(amount0, amount1);
(uint256 _amount0, uint256 _amount1) = unstakePosition(liquidityAmount);
return collectPosition(uint128(_amount0), uint128(_amount1));
}
// Collect fees
function collect() public onlyOwnerOrManager {
(uint256 collected0, uint256 collected1) =
collectPosition(type(uint128).max, type(uint128).max);
uint256 fee0 = Utils.calculateFee(collected0, feeDivisors.claimFee);
uint256 fee1 = Utils.calculateFee(collected1, feeDivisors.claimFee);
_incrementWithdrawableToken0Fees(fee0);
_incrementWithdrawableToken1Fees(fee1);
emit FeeCollected(collected0, collected1);
}
/**
* @dev Check if token amounts match before attempting rebalance
* @dev Uniswap contract requires deposits at a precise token ratio
* @dev If they don't match, swap the tokens so as to deposit as much as possible
*/
function checkIfAmountsMatchAndSwap(
uint256 amount0ToMint,
uint256 amount1ToMint
) private returns (uint256 amount0, uint256 amount1) {
UniswapLibrary.TokenDetails memory tokenDetails =
UniswapLibrary.TokenDetails({
token0: address(token0),
token1: address(token1),
token0DecimalMultiplier: token0DecimalMultiplier,
token1DecimalMultiplier: token1DecimalMultiplier,
token0Decimals: token0Decimals,
token1Decimals: token1Decimals
});
UniswapLibrary.PositionDetails memory positionDetails =
UniswapLibrary.PositionDetails({
poolFee: POOL_FEE,
priceLower: priceLower,
priceUpper: priceUpper,
tokenId: tokenId,
positionManager: positionManagerAddress,
router: routerAddress,
pool: poolAddress
});
return
UniswapLibrary.checkIfAmountsMatchAndSwap(
true,
amount0ToMint,
amount1ToMint,
positionDetails,
tokenDetails
);
}
// Migrate the current position to a new position with different ticks
function migratePosition(int24 newTickLower, int24 newTickUpper)
external
onlyOwnerOrManager
{
require(newTickLower != tickLower || newTickUpper != tickUpper);
// withdraw entire liquidity from the position
(uint256 _amount0, uint256 _amount1) = withdrawAll();
// burn current position NFT
UniswapLibrary.burn(positionManagerAddress, tokenId);
tokenId = 0;
// set new ticks and prices
tickLower = newTickLower;
tickUpper = newTickUpper;
priceLower = UniswapLibrary.getSqrtRatio(newTickLower);
priceUpper = UniswapLibrary.getSqrtRatio(newTickUpper);
// if amounts don't add up when minting, swap tokens
(uint256 amount0, uint256 amount1) =
checkIfAmountsMatchAndSwap(_amount0, _amount1);
// mint the position NFT and deposit the liquidity
// set new NFT token id
tokenId = createPosition(amount0, amount1);
}
// Withdraws all current liquidity from the position
function withdrawAll()
private
returns (uint256 _amount0, uint256 _amount1)
{
// Collect fees
collect();
(_amount0, _amount1) = unstakePosition(getPositionLiquidity());
collectPosition(uint128(_amount0), uint128(_amount1));
}
/**
* Mint function which initializes the pool position
* Must be called before any liquidity can be deposited
*/
function mintInitial(uint256 amount0, uint256 amount1)
external
onlyOwnerOrManager
{
require(tokenId == 0);
require(amount0 > 0 || amount1 > 0);
checkTwap();
if (amount0 > 0) {
token0.safeTransferFrom(msg.sender, address(this), amount0);
}
if (amount1 > 0) {
token1.safeTransferFrom(msg.sender, address(this), amount1);
}
tokenId = createPosition(amount0, amount1);
amount0 = getToken0AmountInWei(amount0);
amount1 = getToken1AmountInWei(amount1);
_mintInternal(getAmountInAsset1Terms(amount0).add(amount1));
}
/**
* @dev Creates the NFT token representing the pool position
* @dev Mint initial liquidity
*/
function createPosition(uint256 amount0, uint256 amount1)
private
returns (uint256 _tokenId)
{
UniswapLibrary.TokenDetails memory tokenDetails =
UniswapLibrary.TokenDetails({
token0: address(token0),
token1: address(token1),
token0DecimalMultiplier: token0DecimalMultiplier,
token1DecimalMultiplier: token1DecimalMultiplier,
token0Decimals: token0Decimals,
token1Decimals: token1Decimals
});
UniswapLibrary.PositionDetails memory positionDetails =
UniswapLibrary.PositionDetails({
poolFee: POOL_FEE,
priceLower: priceLower,
priceUpper: priceUpper,
tokenId: tokenId,
positionManager: positionManagerAddress,
router: routerAddress,
pool: poolAddress
});
return
UniswapLibrary.createPosition(
amount0,
amount1,
positionManagerAddress,
tokenDetails,
positionDetails
);
}
/**
* @dev Unstakes a given amount of liquidity from the Uni V3 position
* @param liquidity amount of liquidity to unstake
* @return amount0 token0 amount unstaked
* @return amount1 token1 amount unstaked
*/
function unstakePosition(uint128 liquidity)
private
returns (uint256 amount0, uint256 amount1)
{
UniswapLibrary.PositionDetails memory positionDetails =
UniswapLibrary.PositionDetails({
poolFee: POOL_FEE,
priceLower: priceLower,
priceUpper: priceUpper,
tokenId: tokenId,
positionManager: positionManagerAddress,
router: routerAddress,
pool: poolAddress
});
return UniswapLibrary.unstakePosition(liquidity, positionDetails);
}
/*
* @notice Registers that admin is present and active
* @notice If admin isn't certified within liquidation time period,
* emergencyUnstake function becomes callable
*/
function _certifyAdmin() private {
adminActiveTimestamp = block.timestamp;
}
/*
* @dev Public callable function for unstaking in event of admin failure/incapacitation
*/
function emergencyUnstake(uint256 _amount0, uint256 _amount1) external {
require(
adminActiveTimestamp.add(LIQUIDATION_TIME_PERIOD) < block.timestamp
);
_unstake(_amount0, _amount1);
}
function _mintInternal(uint256 _amount) private {
uint256 mintAmount = calculateMintAmount(_amount, totalSupply());
return super._mint(msg.sender, mintAmount);
}
function _incrementWithdrawableToken0Fees(uint256 _feeAmount) private {
withdrawableToken0Fees = withdrawableToken0Fees.add(
getToken0AmountInWei(_feeAmount)
);
}
function _incrementWithdrawableToken1Fees(uint256 _feeAmount) private {
withdrawableToken1Fees = withdrawableToken1Fees.add(
getToken1AmountInWei(_feeAmount)
);
}
/*
* @notice Inverse of fee i.e., a fee divisor of 100 == 1%
* @notice Three fee types
* @dev Mint fee 0 or <= 1%
* @dev Burn fee 0 or <= 1%
* @dev Claim fee 0 <= 4%
*/
function setFeeDivisors(FeeDivisors memory _feeDivisors)
external
onlyOwnerOrManager
{
_setFeeDivisors(_feeDivisors);
}
function _setFeeDivisors(FeeDivisors memory _feeDivisors) private {
require(_feeDivisors.mintFee == 0 || _feeDivisors.mintFee >= 100);
require(_feeDivisors.burnFee == 0 || _feeDivisors.burnFee >= 100);
require(_feeDivisors.claimFee == 0 || _feeDivisors.claimFee >= 25);
feeDivisors.mintFee = _feeDivisors.mintFee;
feeDivisors.burnFee = _feeDivisors.burnFee;
feeDivisors.claimFee = _feeDivisors.claimFee;
emit FeeDivisorsSet(
feeDivisors.mintFee,
feeDivisors.burnFee,
feeDivisors.claimFee
);
}
/*
* Emergency function in case of errant transfer
* of any token directly to contract
*/
function withdrawToken(address token, address receiver)
external
onlyOwnerOrManager
{
require(token != address(token0) && token != address(token1));
uint256 tokenBal = IERC20(address(token)).balanceOf(address(this));
if (tokenBal > 0) {
IERC20(address(token)).safeTransfer(receiver, tokenBal);
}
}
/*
* Withdraw function for token0 and token1 fees
*/
function withdrawFees() external {
require(
xTokenManager.isRevenueController(msg.sender),
"Callable only by Revenue Controller"
);
uint256 token0Fees =
getToken0AmountInNativeDecimals(withdrawableToken0Fees);
uint256 token1Fees =
getToken1AmountInNativeDecimals(withdrawableToken1Fees);
if (token0Fees > 0) {
token0.safeTransfer(msg.sender, token0Fees);
withdrawableToken0Fees = 0;
}
if (token1Fees > 0) {
token1.safeTransfer(msg.sender, token1Fees);
withdrawableToken1Fees = 0;
}
emit FeeWithdraw(token0Fees, token1Fees);
}
/*
* Admin function for staking beyond the scope of a rebalance
*/
function adminStake(uint256 amount0, uint256 amount1)
external
onlyOwnerOrManager
{
_stake(amount0, amount1);
}
/*
* Admin function for unstaking beyond the scope of a rebalance
*/
function adminUnstake(uint256 amount0, uint256 amount1)
external
onlyOwnerOrManager
{
_unstake(amount0, amount1);
}
/*
* Admin function for swapping LP tokens in xU3LP
* @param amount - how much to swap
* @param _0for1 - swap token 0 for 1 if true, token 1 for 0 if false
*/
function adminSwap(uint256 amount, bool _0for1)
external
onlyOwnerOrManager
{
if (_0for1) {
swapToken0ForToken1(amount.add(amount.div(SWAP_SLIPPAGE)), amount);
} else {
swapToken1ForToken0(amount.add(amount.div(SWAP_SLIPPAGE)), amount);
}
}
/**
* @dev Admin function for swapping LP tokens in xU3LP using 1inch v3 exchange
* @param minReturn - how much output tokens to receive on swap, in 18 decimals
* @param _0for1 - swap token 0 for token 1 if true, token 1 for token 0 if false
* @param _oneInchData - 1inch calldata, generated off-chain using their v3 api
*/
function adminSwapOneInch(
uint256 minReturn,
bool _0for1,
bytes memory _oneInchData
) external onlyOwnerOrManager {
UniswapLibrary.oneInchSwap(
true,
minReturn,
_0for1,
UniswapLibrary.TokenDetails({
token0: address(token0),
token1: address(token1),
token0DecimalMultiplier: token0DecimalMultiplier,
token1DecimalMultiplier: token1DecimalMultiplier,
token0Decimals: token0Decimals,
token1Decimals: token1Decimals
}),
_oneInchData
);
}
function pauseContract() external onlyOwnerOrManager returns (bool) {
_pause();
return true;
}
function unpauseContract() external onlyOwnerOrManager returns (bool) {
_unpause();
return true;
}
modifier onlyOwnerOrManager {
require(
msg.sender == owner() ||
xTokenManager.isManager(msg.sender, address(this)),
"Function may be called only by owner or manager"
);
_;
}
/* ========================================================================================= */
/* Uniswap helpers */
/* ========================================================================================= */
function swapToken0ForToken1(uint256 amountIn, uint256 amountOut) private {
UniswapLibrary.swapToken0ForToken1(
amountIn,
amountOut,
POOL_FEE,
routerAddress,
UniswapLibrary.TokenDetails({
token0: address(token0),
token1: address(token1),
token0DecimalMultiplier: token0DecimalMultiplier,
token1DecimalMultiplier: token1DecimalMultiplier,
token0Decimals: token0Decimals,
token1Decimals: token1Decimals
})
);
}
function swapToken1ForToken0(uint256 amountIn, uint256 amountOut) private {
UniswapLibrary.swapToken1ForToken0(
amountIn,
amountOut,
POOL_FEE,
routerAddress,
UniswapLibrary.TokenDetails({
token0: address(token0),
token1: address(token1),
token0DecimalMultiplier: token0DecimalMultiplier,
token1DecimalMultiplier: token1DecimalMultiplier,
token0Decimals: token0Decimals,
token1Decimals: token1Decimals
})
);
}
// Returns the current liquidity in the position
function getPositionLiquidity() public view returns (uint128 liquidity) {
return
UniswapLibrary.getPositionLiquidity(
positionManagerAddress,
tokenId
);
}
// Returns the current pool price
function getPoolPrice() private view returns (uint160) {
return UniswapLibrary.getPoolPrice(poolAddress);
}
// Returns the current pool liquidity
function getPoolLiquidity() private view returns (uint128) {
return UniswapLibrary.getPoolLiquidity(poolAddress);
}
/**
* @dev Checks if twap deviates too much from the previous twap
*/
function checkTwap() private {
lastTwap = UniswapLibrary.checkTwap(
poolAddress,
twapPeriod,
token0Decimals,
token1Decimals,
tokenDiffDecimalMultiplier,
lastTwap,
maxTwapDeviationDivisor
);
}
/**
* Reset last twap if oracle price is consistently above the max deviation
* Requires twap to be above max deviation to execute
*/
function resetTwap() external onlyOwnerOrManager {
lastTwap = getAsset0Price();
}
/**
* Set the max twap deviation divisor
*/
function setMaxTwapDeviationDivisor(uint256 newDeviationDivisor)
external
onlyOwnerOrManager
{
maxTwapDeviationDivisor = newDeviationDivisor;
}
/**
* Set the oracle reading twap period
*/
function setTwapPeriod(uint32 newPeriod) external onlyOwnerOrManager {
require(newPeriod >= 360);
twapPeriod = newPeriod;
}
/**
* @dev Collect token amounts from pool position
*/
function collectPosition(uint128 amount0, uint128 amount1)
private
returns (uint256 collected0, uint256 collected1)
{
return
UniswapLibrary.collectPosition(
amount0,
amount1,
tokenId,
positionManagerAddress
);
}
/**
* Calculates the amounts deposited/withdrawn from the pool
* amount0, amount1 - amounts to deposit/withdraw
* amount0Minted, amount1Minted - actual amounts which can be deposited
*/
function calculatePoolMintedAmounts(uint256 amount0, uint256 amount1)
public
view
returns (uint256 amount0Minted, uint256 amount1Minted)
{
uint128 liquidityAmount = getLiquidityForAmounts(amount0, amount1);
(amount0Minted, amount1Minted) = getAmountsForLiquidity(
liquidityAmount
);
}
function getAmountsForLiquidity(uint128 liquidity)
public
view
returns (uint256 amount0, uint256 amount1)
{
(amount0, amount1) = UniswapLibrary.getAmountsForLiquidity(
liquidity,
priceLower,
priceUpper,
poolAddress
);
}
function getLiquidityForAmounts(uint256 amount0, uint256 amount1)
public
view
returns (uint128 liquidity)
{
liquidity = UniswapLibrary.getLiquidityForAmounts(
amount0,
amount1,
priceLower,
priceUpper,
poolAddress
);
}
/**
* Get lower and upper ticks of the pool position
*/
function getTicks() external view returns (int24 tick0, int24 tick1) {
return (tickLower, tickUpper);
}
/**
* Returns token0 amount in TOKEN_DECIMAL_REPRESENTATION
*/
function getToken0AmountInWei(uint256 amount)
private
view
returns (uint256)
{
return
UniswapLibrary.getToken0AmountInWei(
amount,
token0Decimals,
token0DecimalMultiplier
);
}
/**
* Returns token1 amount in TOKEN_DECIMAL_REPRESENTATION
*/
function getToken1AmountInWei(uint256 amount)
private
view
returns (uint256)
{
return
UniswapLibrary.getToken1AmountInWei(
amount,
token1Decimals,
token1DecimalMultiplier
);
}
/**
* Returns token0 amount in token0Decimals
*/
function getToken0AmountInNativeDecimals(uint256 amount)
private
view
returns (uint256)
{
return
UniswapLibrary.getToken0AmountInNativeDecimals(
amount,
token0Decimals,
token0DecimalMultiplier
);
}
/**
* Returns token1 amount in token1Decimals
*/
function getToken1AmountInNativeDecimals(uint256 amount)
private
view
returns (uint256)
{
return
UniswapLibrary.getToken1AmountInNativeDecimals(
amount,
token1Decimals,
token1DecimalMultiplier
);
}
/**
* Set xTokenManager contract
*/
function setxTokenManager(IxTokenManager _manager) external onlyOwner {
require(address(xTokenManager) == address(0));
xTokenManager = _manager;
}
/**
* Approve 1inch v3 exchange for swaps
*/
function approveOneInch() external onlyOwnerOrManager {
UniswapLibrary.approveOneInch(token0, token1);
}
}
// SPDX-License-Identifier: MIT
// solhint-disable-next-line compiler-version
pragma solidity >=0.4.24 <0.8.0;
import "../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/Initializable.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "./ContextUpgradeable.sol";
import "../proxy/Initializable.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
function __Pausable_init() internal initializer {
__Context_init_unchained();
__Pausable_init_unchained();
}
function __Pausable_init_unchained() internal initializer {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "../../utils/ContextUpgradeable.sol";
import "./IERC20Upgradeable.sol";
import "../../math/SafeMathUpgradeable.sol";
import "../../proxy/Initializable.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable {
using SafeMathUpgradeable for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
function __ERC20_init(string memory name_, string memory symbol_) internal initializer {
__Context_init_unchained();
__ERC20_init_unchained(name_, symbol_);
}
function __ERC20_init_unchained(string memory name_, string memory symbol_) internal initializer {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal virtual {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
uint256[44] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: BSD-4-Clause
/*
* ABDK Math 64.64 Smart Contract Library. Copyright © 2019 by ABDK Consulting.
* Author: Mikhail Vladimirov <[email protected]>
*/
pragma solidity 0.7.6;
/**
* Smart contract library of mathematical functions operating with signed
* 64.64-bit fixed point numbers. Signed 64.64-bit fixed point number is
* basically a simple fraction whose numerator is signed 128-bit integer and
* denominator is 2^64. As long as denominator is always the same, there is no
* need to store it, thus in Solidity signed 64.64-bit fixed point numbers are
* represented by int128 type holding only the numerator.
*/
library ABDKMath64x64 {
/*
* Minimum value signed 64.64-bit fixed point number may have.
*/
int128 private constant MIN_64x64 = -0x80000000000000000000000000000000;
/*
* Maximum value signed 64.64-bit fixed point number may have.
*/
int128 private constant MAX_64x64 = 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF;
/**
* Convert signed 256-bit integer number into signed 64.64-bit fixed point
* number. Revert on overflow.
*
* @param x signed 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function fromInt(int256 x) internal pure returns (int128) {
require(x >= -0x8000000000000000 && x <= 0x7FFFFFFFFFFFFFFF);
return int128(x << 64);
}
/**
* Convert signed 64.64 fixed point number into signed 64-bit integer number
* rounding down.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64-bit integer number
*/
function toInt(int128 x) internal pure returns (int64) {
return int64(x >> 64);
}
/**
* Convert unsigned 256-bit integer number into signed 64.64-bit fixed point
* number. Revert on overflow.
*
* @param x unsigned 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function fromUInt(uint256 x) internal pure returns (int128) {
require(x <= 0x7FFFFFFFFFFFFFFF);
return int128(x << 64);
}
/**
* Convert signed 64.64 fixed point number into unsigned 64-bit integer
* number rounding down. Revert on underflow.
*
* @param x signed 64.64-bit fixed point number
* @return unsigned 64-bit integer number
*/
function toUInt(int128 x) internal pure returns (uint64) {
require(x >= 0);
return uint64(x >> 64);
}
/**
* Calculate x + y. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function add(int128 x, int128 y) internal pure returns (int128) {
int256 result = int256(x) + y;
require(result >= MIN_64x64 && result <= MAX_64x64);
return int128(result);
}
/**
* Calculate x - y. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function sub(int128 x, int128 y) internal pure returns (int128) {
int256 result = int256(x) - y;
require(result >= MIN_64x64 && result <= MAX_64x64);
return int128(result);
}
/**
* Calculate x * y rounding down. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function mul(int128 x, int128 y) internal pure returns (int128) {
int256 result = (int256(x) * y) >> 64;
require(result >= MIN_64x64 && result <= MAX_64x64);
return int128(result);
}
/**
* Calculate x * y rounding down, where x is signed 64.64 fixed point number
* and y is unsigned 256-bit integer number. Revert on overflow.
*
* @param x signed 64.64 fixed point number
* @param y unsigned 256-bit integer number
* @return unsigned 256-bit integer number
*/
function mulu(int128 x, uint256 y) internal pure returns (uint256) {
if (y == 0) return 0;
require(x >= 0);
uint256 lo =
(uint256(x) * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)) >> 64;
uint256 hi = uint256(x) * (y >> 128);
require(hi <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
hi <<= 64;
require(
hi <=
0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF -
lo
);
return hi + lo;
}
/**
* Calculate x / y rounding towards zero, where x and y are unsigned 256-bit
* integer numbers. Revert on overflow or when y is zero.
*
* @param x unsigned 256-bit integer number
* @param y unsigned 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function divu(uint256 x, uint256 y) internal pure returns (int128) {
require(y != 0);
uint128 result = divuu(x, y);
require(result <= uint128(MAX_64x64));
return int128(result);
}
/**
* Calculate 1 / x rounding towards zero. Revert on overflow or when x is
* zero.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function inv(int128 x) internal pure returns (int128) {
require(x != 0);
int256 result = int256(0x100000000000000000000000000000000) / x;
require(result >= MIN_64x64 && result <= MAX_64x64);
return int128(result);
}
/**
* Calculate x^y assuming 0^0 is 1, where x is signed 64.64 fixed point number
* and y is unsigned 256-bit integer number. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y uint256 value
* @return signed 64.64-bit fixed point number
*/
function pow(int128 x, uint256 y) internal pure returns (int128) {
uint256 absoluteResult;
bool negativeResult = false;
if (x >= 0) {
absoluteResult = powu(uint256(x) << 63, y);
} else {
// We rely on overflow behavior here
absoluteResult = powu(uint256(uint128(-x)) << 63, y);
negativeResult = y & 1 > 0;
}
absoluteResult >>= 63;
if (negativeResult) {
require(absoluteResult <= 0x80000000000000000000000000000000);
return -int128(absoluteResult); // We rely on overflow behavior here
} else {
require(absoluteResult <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
return int128(absoluteResult); // We rely on overflow behavior here
}
}
/**
* Calculate x / y rounding towards zero, where x and y are unsigned 256-bit
* integer numbers. Revert on overflow or when y is zero.
*
* @param x unsigned 256-bit integer number
* @param y unsigned 256-bit integer number
* @return unsigned 64.64-bit fixed point number
*/
function divuu(uint256 x, uint256 y) internal pure returns (uint128) {
require(y != 0);
uint256 result;
if (x <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)
result = (x << 64) / y;
else {
uint256 msb = 192;
uint256 xc = x >> 192;
if (xc >= 0x100000000) {
xc >>= 32;
msb += 32;
}
if (xc >= 0x10000) {
xc >>= 16;
msb += 16;
}
if (xc >= 0x100) {
xc >>= 8;
msb += 8;
}
if (xc >= 0x10) {
xc >>= 4;
msb += 4;
}
if (xc >= 0x4) {
xc >>= 2;
msb += 2;
}
if (xc >= 0x2) msb += 1; // No need to shift xc anymore
result = (x << (255 - msb)) / (((y - 1) >> (msb - 191)) + 1);
require(result <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
uint256 hi = result * (y >> 128);
uint256 lo = result * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
uint256 xh = x >> 192;
uint256 xl = x << 64;
if (xl < lo) xh -= 1;
xl -= lo; // We rely on overflow behavior here
lo = hi << 128;
if (xl < lo) xh -= 1;
xl -= lo; // We rely on overflow behavior here
assert(xh == hi >> 128);
result += xl / y;
}
require(result <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
return uint128(result);
}
/**
* Calculate x^y assuming 0^0 is 1, where x is unsigned 129.127 fixed point
* number and y is unsigned 256-bit integer number. Revert on overflow.
*
* @param x unsigned 129.127-bit fixed point number
* @param y uint256 value
* @return unsigned 129.127-bit fixed point number
*/
function powu(uint256 x, uint256 y) private pure returns (uint256) {
if (y == 0) return 0x80000000000000000000000000000000;
else if (x == 0) return 0;
else {
int256 msb = 0;
uint256 xc = x;
if (xc >= 0x100000000000000000000000000000000) {
xc >>= 128;
msb += 128;
}
if (xc >= 0x10000000000000000) {
xc >>= 64;
msb += 64;
}
if (xc >= 0x100000000) {
xc >>= 32;
msb += 32;
}
if (xc >= 0x10000) {
xc >>= 16;
msb += 16;
}
if (xc >= 0x100) {
xc >>= 8;
msb += 8;
}
if (xc >= 0x10) {
xc >>= 4;
msb += 4;
}
if (xc >= 0x4) {
xc >>= 2;
msb += 2;
}
if (xc >= 0x2) msb += 1; // No need to shift xc anymore
int256 xe = msb - 127;
if (xe > 0) x >>= uint256(xe);
else x <<= uint256(-xe);
uint256 result = 0x80000000000000000000000000000000;
int256 re = 0;
while (y > 0) {
if (y & 1 > 0) {
result = result * x;
y -= 1;
re += xe;
if (
result >=
0x8000000000000000000000000000000000000000000000000000000000000000
) {
result >>= 128;
re += 1;
} else result >>= 127;
if (re < -127) return 0; // Underflow
require(re < 128); // Overflow
} else {
x = x * x;
y >>= 1;
xe <<= 1;
if (
x >=
0x8000000000000000000000000000000000000000000000000000000000000000
) {
x >>= 128;
xe += 1;
} else x >>= 127;
if (xe < -127) return 0; // Underflow
require(xe < 128); // Overflow
}
}
if (re > 0) result <<= uint256(re);
else if (re < 0) result >>= uint256(-re);
return result;
}
}
/**
* Calculate sqrt (x) rounding down, where x is unsigned 256-bit integer
* number.
*
* @param x unsigned 256-bit integer number
* @return unsigned 128-bit integer number
*/
function sqrtu(uint256 x) internal pure returns (uint128) {
if (x == 0) return 0;
else {
uint256 xx = x;
uint256 r = 1;
if (xx >= 0x100000000000000000000000000000000) {
xx >>= 128;
r <<= 64;
}
if (xx >= 0x10000000000000000) {
xx >>= 64;
r <<= 32;
}
if (xx >= 0x100000000) {
xx >>= 32;
r <<= 16;
}
if (xx >= 0x10000) {
xx >>= 16;
r <<= 8;
}
if (xx >= 0x100) {
xx >>= 8;
r <<= 4;
}
if (xx >= 0x10) {
xx >>= 4;
r <<= 2;
}
if (xx >= 0x8) {
r <<= 1;
}
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1; // Seven iterations should be enough
uint256 r1 = x / r;
return uint128(r < r1 ? r : r1);
}
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.7.6;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./ABDKMath64x64.sol";
/**
* Library with utility functions for xU3LP
*/
library Utils {
using SafeMath for uint256;
/**
Get asset 1 twap price for the period of [now - secondsAgo, now]
*/
function getTWAP(int56[] memory prices, uint32 secondsAgo)
internal
pure
returns (int128)
{
// Formula is
// 1.0001 ^ (currentPrice - pastPrice) / secondsAgo
if (secondsAgo == 0) {
return ABDKMath64x64.fromInt(1);
}
int256 diff = int256(prices[1]) - int256(prices[0]);
uint256 priceDiff = diff < 0 ? uint256(-diff) : uint256(diff);
int128 fraction = ABDKMath64x64.divu(priceDiff, uint256(secondsAgo));
int128 twap =
ABDKMath64x64.pow(
ABDKMath64x64.divu(10001, 10000),
uint256(ABDKMath64x64.toUInt(fraction))
);
// This is necessary because we cannot call .pow on unsigned integers
// And thus when asset0Price > asset1Price we need to reverse the value
twap = diff < 0 ? ABDKMath64x64.inv(twap) : twap;
return twap;
}
/**
* Helper function to calculate how much to swap to deposit / withdraw
* In Uni Pool to satisfy the required buffer balance in xU3LP of 5%
*/
function calculateSwapAmount(
uint256 amount0ToMint,
uint256 amount1ToMint,
uint256 amount0Minted,
uint256 amount1Minted,
int128 liquidityRatio
) internal pure returns (uint256 swapAmount) {
// formula: swapAmount =
// (amount0ToMint * amount1Minted -
// amount1ToMint * amount0Minted) /
// ((amount0Minted + amount1Minted) +
// liquidityRatio * (amount0ToMint + amount1ToMint))
uint256 mul1 = amount0ToMint.mul(amount1Minted);
uint256 mul2 = amount1ToMint.mul(amount0Minted);
uint256 sub = subAbs(mul1, mul2);
uint256 add1 = amount0Minted.add(amount1Minted);
uint256 add2 =
ABDKMath64x64.mulu(
liquidityRatio,
amount0ToMint.add(amount1ToMint)
);
uint256 add = add1.add(add2);
// Some numbers are too big to fit in ABDK's div 128-bit representation
// So calculate the root of the equation and then raise to the 2nd power
int128 nRatio =
ABDKMath64x64.divu(
ABDKMath64x64.sqrtu(sub),
ABDKMath64x64.sqrtu(add)
);
int64 n = ABDKMath64x64.toInt(nRatio);
swapAmount = uint256(n)**2;
}
// comparator for 32-bit timestamps
// @return bool Whether a <= b
function lte(
uint32 time,
uint32 a,
uint32 b
) internal pure returns (bool) {
if (a <= time && b <= time) return a <= b;
uint256 aAdjusted = a > time ? a : a + 2**32;
uint256 bAdjusted = b > time ? b : b + 2**32;
return aAdjusted <= bAdjusted;
}
// Subtract two numbers and return absolute value
function subAbs(uint256 amount0, uint256 amount1)
internal
pure
returns (uint256)
{
return amount0 >= amount1 ? amount0.sub(amount1) : amount1.sub(amount0);
}
// Subtract two numbers and return 0 if result is < 0
function sub0(uint256 amount0, uint256 amount1)
internal
pure
returns (uint256)
{
return amount0 >= amount1 ? amount0.sub(amount1) : 0;
}
function calculateFee(uint256 _value, uint256 _feeDivisor)
internal
pure
returns (uint256 fee)
{
if (_feeDivisor > 0) {
fee = _value.div(_feeDivisor);
}
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.7.6;
pragma abicoder v2;
import "@uniswap/v3-periphery/contracts/interfaces/INonfungiblePositionManager.sol";
import "@uniswap/v3-periphery/contracts/interfaces/ISwapRouter.sol";
import "@uniswap/v3-periphery/contracts/libraries/LiquidityAmounts.sol";
import "@uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol";
import "@uniswap/v3-core/contracts/libraries/TickMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./ABDKMath64x64.sol";
import "./Utils.sol";
/**
* Helper library for Uniswap functions
* Used in xU3LP and xAssetCLR
*/
library UniswapLibrary {
using SafeMath for uint256;
using SafeERC20 for IERC20;
uint8 private constant TOKEN_DECIMAL_REPRESENTATION = 18;
uint256 private constant SWAP_SLIPPAGE = 100; // 1%
uint256 private constant MINT_BURN_SLIPPAGE = 100; // 1%
uint256 private constant BUFFER_TARGET = 20; // 5% target
// 1inch v3 exchange address
address private constant oneInchExchange =
0x11111112542D85B3EF69AE05771c2dCCff4fAa26;
struct TokenDetails {
address token0;
address token1;
uint256 token0DecimalMultiplier;
uint256 token1DecimalMultiplier;
uint8 token0Decimals;
uint8 token1Decimals;
}
struct PositionDetails {
uint24 poolFee;
uint160 priceLower;
uint160 priceUpper;
uint256 tokenId;
address positionManager;
address router;
address pool;
}
struct AmountsMinted {
uint256 amount0ToMint;
uint256 amount1ToMint;
uint256 amount0Minted;
uint256 amount1Minted;
}
/* ========================================================================================= */
/* Uni V3 Pool Helper functions */
/* ========================================================================================= */
/**
* @dev Returns the current pool price
*/
function getPoolPrice(address _pool) public view returns (uint160) {
IUniswapV3Pool pool = IUniswapV3Pool(_pool);
(uint160 sqrtRatioX96, , , , , , ) = pool.slot0();
return sqrtRatioX96;
}
/**
* @dev Returns the current pool liquidity
*/
function getPoolLiquidity(address _pool) public view returns (uint128) {
IUniswapV3Pool pool = IUniswapV3Pool(_pool);
return pool.liquidity();
}
/**
* @dev Calculate pool liquidity for given token amounts
*/
function getLiquidityForAmounts(
uint256 amount0,
uint256 amount1,
uint160 priceLower,
uint160 priceUpper,
address pool
) public view returns (uint128 liquidity) {
liquidity = LiquidityAmounts.getLiquidityForAmounts(
getPoolPrice(pool),
priceLower,
priceUpper,
amount0,
amount1
);
}
/**
* @dev Calculate token amounts for given pool liquidity
*/
function getAmountsForLiquidity(
uint128 liquidity,
uint160 priceLower,
uint160 priceUpper,
address pool
) public view returns (uint256 amount0, uint256 amount1) {
(amount0, amount1) = LiquidityAmounts.getAmountsForLiquidity(
getPoolPrice(pool),
priceLower,
priceUpper,
liquidity
);
}
/**
* @dev Calculates the amounts deposited/withdrawn from the pool
* @param amount0 - token0 amount to deposit/withdraw
* @param amount1 - token1 amount to deposit/withdraw
*/
function calculatePoolMintedAmounts(
uint256 amount0,
uint256 amount1,
uint160 priceLower,
uint160 priceUpper,
address pool
) public view returns (uint256 amount0Minted, uint256 amount1Minted) {
uint128 liquidityAmount =
getLiquidityForAmounts(
amount0,
amount1,
priceLower,
priceUpper,
pool
);
(amount0Minted, amount1Minted) = getAmountsForLiquidity(
liquidityAmount,
priceLower,
priceUpper,
pool
);
}
/**
* @dev Get asset 0 twap
* @dev Uses Uni V3 oracle, reading the TWAP from twap period
* @dev or the earliest oracle observation time if twap period is not set
*/
function getAsset0Price(
address pool,
uint32 twapPeriod,
uint8 token0Decimals,
uint8 token1Decimals,
uint256 tokenDiffDecimalMultiplier
) public view returns (int128) {
uint32[] memory secondsArray = new uint32[](2);
// get earliest oracle observation time
IUniswapV3Pool poolImpl = IUniswapV3Pool(pool);
uint32 observationTime = getObservationTime(poolImpl);
uint32 currTimestamp = uint32(block.timestamp);
uint32 earliestObservationSecondsAgo = currTimestamp - observationTime;
if (
twapPeriod == 0 ||
!Utils.lte(
currTimestamp,
observationTime,
currTimestamp - twapPeriod
)
) {
// set to earliest observation time if:
// a) twap period is 0 (not set)
// b) now - twap period is before earliest observation
secondsArray[0] = earliestObservationSecondsAgo;
} else {
secondsArray[0] = twapPeriod;
}
secondsArray[1] = 0;
(int56[] memory prices, ) = poolImpl.observe(secondsArray);
int128 twap = Utils.getTWAP(prices, secondsArray[0]);
if (token1Decimals > token0Decimals) {
// divide twap by token decimal difference
twap = ABDKMath64x64.mul(
twap,
ABDKMath64x64.divu(1, tokenDiffDecimalMultiplier)
);
} else if (token0Decimals > token1Decimals) {
// multiply twap by token decimal difference
int128 multiplierFixed =
ABDKMath64x64.fromUInt(tokenDiffDecimalMultiplier);
twap = ABDKMath64x64.mul(twap, multiplierFixed);
}
return twap;
}
/**
* @dev Get asset 1 twap
* @dev Uses Uni V3 oracle, reading the TWAP from twap period
* @dev or the earliest oracle observation time if twap period is not set
*/
function getAsset1Price(
address pool,
uint32 twapPeriod,
uint8 token0Decimals,
uint8 token1Decimals,
uint256 tokenDiffDecimalMultiplier
) public view returns (int128) {
return
ABDKMath64x64.inv(
getAsset0Price(
pool,
twapPeriod,
token0Decimals,
token1Decimals,
tokenDiffDecimalMultiplier
)
);
}
/**
* @dev Returns amount in terms of asset 0
* @dev amount * asset 1 price
*/
function getAmountInAsset0Terms(
uint256 amount,
address pool,
uint32 twapPeriod,
uint8 token0Decimals,
uint8 token1Decimals,
uint256 tokenDiffDecimalMultiplier
) public view returns (uint256) {
return
ABDKMath64x64.mulu(
getAsset1Price(
pool,
twapPeriod,
token0Decimals,
token1Decimals,
tokenDiffDecimalMultiplier
),
amount
);
}
/**
* @dev Returns amount in terms of asset 1
* @dev amount * asset 0 price
*/
function getAmountInAsset1Terms(
uint256 amount,
address pool,
uint32 twapPeriod,
uint8 token0Decimals,
uint8 token1Decimals,
uint256 tokenDiffDecimalMultiplier
) public view returns (uint256) {
return
ABDKMath64x64.mulu(
getAsset0Price(
pool,
twapPeriod,
token0Decimals,
token1Decimals,
tokenDiffDecimalMultiplier
),
amount
);
}
/**
* @dev Returns the earliest oracle observation time
*/
function getObservationTime(IUniswapV3Pool _pool)
public
view
returns (uint32)
{
IUniswapV3Pool pool = _pool;
(, , uint16 index, uint16 cardinality, , , ) = pool.slot0();
uint16 oldestObservationIndex = (index + 1) % cardinality;
(uint32 observationTime, , , bool initialized) =
pool.observations(oldestObservationIndex);
if (!initialized) (observationTime, , , ) = pool.observations(0);
return observationTime;
}
/**
* @dev Checks if twap deviates too much from the previous twap
* @return current twap
*/
function checkTwap(
address pool,
uint32 twapPeriod,
uint8 token0Decimals,
uint8 token1Decimals,
uint256 tokenDiffDecimalMultiplier,
int128 lastTwap,
uint256 maxTwapDeviationDivisor
) public view returns (int128) {
int128 twap =
getAsset0Price(
pool,
twapPeriod,
token0Decimals,
token1Decimals,
tokenDiffDecimalMultiplier
);
int128 _lastTwap = lastTwap;
int128 deviation =
_lastTwap > twap ? _lastTwap - twap : twap - _lastTwap;
int128 maxDeviation =
ABDKMath64x64.mul(
twap,
ABDKMath64x64.divu(1, maxTwapDeviationDivisor)
);
require(deviation <= maxDeviation, "Wrong twap");
return twap;
}
/**
* @dev get tick spacing corresponding to pool fee amount
*/
function getTickSpacingForFee(uint24 fee) public pure returns (int24) {
if (fee == 500) {
return 10;
} else if (fee == 3000) {
return 60;
} else if (fee == 10000) {
return 200;
} else {
return 0;
}
}
/* ========================================================================================= */
/* Uni V3 Swap Router Helper functions */
/* ========================================================================================= */
/**
* @dev Swap token 0 for token 1 in xU3LP / xAssetCLR contract
* @dev amountIn and amountOut should be in 18 decimals always
*/
function swapToken0ForToken1(
uint256 amountIn,
uint256 amountOut,
uint24 poolFee,
address routerAddress,
TokenDetails memory tokenDetails
) public {
ISwapRouter router = ISwapRouter(routerAddress);
amountIn = getToken0AmountInNativeDecimals(
amountIn,
tokenDetails.token0Decimals,
tokenDetails.token0DecimalMultiplier
);
amountOut = getToken1AmountInNativeDecimals(
amountOut,
tokenDetails.token1Decimals,
tokenDetails.token1DecimalMultiplier
);
router.exactOutputSingle(
ISwapRouter.ExactOutputSingleParams({
tokenIn: tokenDetails.token0,
tokenOut: tokenDetails.token1,
fee: poolFee,
recipient: address(this),
deadline: block.timestamp,
amountOut: amountOut,
amountInMaximum: amountIn,
sqrtPriceLimitX96: TickMath.MIN_SQRT_RATIO + 1
})
);
}
/**
* @dev Swap token 1 for token 0 in xU3LP / xAssetCLR contract
* @dev amountIn and amountOut should be in 18 decimals always
*/
function swapToken1ForToken0(
uint256 amountIn,
uint256 amountOut,
uint24 poolFee,
address routerAddress,
TokenDetails memory tokenDetails
) public {
ISwapRouter router = ISwapRouter(routerAddress);
amountIn = getToken1AmountInNativeDecimals(
amountIn,
tokenDetails.token1Decimals,
tokenDetails.token1DecimalMultiplier
);
amountOut = getToken0AmountInNativeDecimals(
amountOut,
tokenDetails.token0Decimals,
tokenDetails.token0DecimalMultiplier
);
router.exactOutputSingle(
ISwapRouter.ExactOutputSingleParams({
tokenIn: tokenDetails.token1,
tokenOut: tokenDetails.token0,
fee: poolFee,
recipient: address(this),
deadline: block.timestamp,
amountOut: amountOut,
amountInMaximum: amountIn,
sqrtPriceLimitX96: TickMath.MAX_SQRT_RATIO - 1
})
);
}
/* ========================================================================================= */
/* 1inch Swap Helper functions */
/* ========================================================================================= */
/**
* @dev Swap tokens in xU3LP / xAssetCLR using 1inch v3 exchange
* @param xU3LP - swap for xU3LP if true, xAssetCLR if false
* @param minReturn - required min amount out from swap, in 18 decimals
* @param _0for1 - swap token0 for token1 if true, token1 for token0 if false
* @param tokenDetails - xU3LP / xAssetCLR token 0 and token 1 details
* @param _oneInchData - One inch calldata, generated off-chain from their v3 api for the swap
*/
function oneInchSwap(
bool xU3LP,
uint256 minReturn,
bool _0for1,
TokenDetails memory tokenDetails,
bytes memory _oneInchData
) public {
uint256 token0AmtSwapped;
uint256 token1AmtSwapped;
bool success;
// inline code to prevent stack too deep errors
{
IERC20 token0 = IERC20(tokenDetails.token0);
IERC20 token1 = IERC20(tokenDetails.token1);
uint256 balanceBeforeToken0 = token0.balanceOf(address(this));
uint256 balanceBeforeToken1 = token1.balanceOf(address(this));
(success, ) = oneInchExchange.call(_oneInchData);
require(success, "One inch swap call failed");
uint256 balanceAfterToken0 = token0.balanceOf(address(this));
uint256 balanceAfterToken1 = token1.balanceOf(address(this));
token0AmtSwapped = subAbs(balanceAfterToken0, balanceBeforeToken0);
token1AmtSwapped = subAbs(balanceAfterToken1, balanceBeforeToken1);
}
uint256 amountInSwapped;
uint256 amountOutReceived;
if (_0for1) {
amountInSwapped = getToken0AmountInWei(
token0AmtSwapped,
tokenDetails.token0Decimals,
tokenDetails.token0DecimalMultiplier
);
amountOutReceived = getToken1AmountInWei(
token1AmtSwapped,
tokenDetails.token1Decimals,
tokenDetails.token1DecimalMultiplier
);
} else {
amountInSwapped = getToken1AmountInWei(
token1AmtSwapped,
tokenDetails.token1Decimals,
tokenDetails.token1DecimalMultiplier
);
amountOutReceived = getToken0AmountInWei(
token0AmtSwapped,
tokenDetails.token0Decimals,
tokenDetails.token0DecimalMultiplier
);
}
// require minimum amount received is > min return
require(
amountOutReceived > minReturn,
"One inch swap not enough output token amount"
);
// require amount out > amount in * 98%
// only for xU3LP
require(
xU3LP &&
amountOutReceived >
amountInSwapped.sub(amountInSwapped.div(SWAP_SLIPPAGE * 2)),
"One inch swap slippage > 2 %"
);
}
/**
* Approve 1inch v3 for swaps
*/
function approveOneInch(IERC20 token0, IERC20 token1) public {
token0.safeApprove(oneInchExchange, type(uint256).max);
token1.safeApprove(oneInchExchange, type(uint256).max);
}
/* ========================================================================================= */
/* NFT Position Manager Helpers */
/* ========================================================================================= */
/**
* @dev Returns the current liquidity in a position represented by tokenId NFT
*/
function getPositionLiquidity(address positionManager, uint256 tokenId)
public
view
returns (uint128 liquidity)
{
(, , , , , , , liquidity, , , , ) = INonfungiblePositionManager(
positionManager
)
.positions(tokenId);
}
/**
* @dev Stake liquidity in position represented by tokenId NFT
*/
function stake(
uint256 amount0,
uint256 amount1,
address positionManager,
uint256 tokenId
) public returns (uint256 stakedAmount0, uint256 stakedAmount1) {
(, stakedAmount0, stakedAmount1) = INonfungiblePositionManager(
positionManager
)
.increaseLiquidity(
INonfungiblePositionManager.IncreaseLiquidityParams({
tokenId: tokenId,
amount0Desired: amount0,
amount1Desired: amount1,
amount0Min: amount0.sub(amount0.div(MINT_BURN_SLIPPAGE)),
amount1Min: amount1.sub(amount1.div(MINT_BURN_SLIPPAGE)),
deadline: block.timestamp
})
);
}
/**
* @dev Unstake liquidity from position represented by tokenId NFT
* @dev using amount0 and amount1 instead of liquidity
*/
function unstake(
uint256 amount0,
uint256 amount1,
PositionDetails memory positionDetails
) public returns (uint256 collected0, uint256 collected1) {
uint128 liquidityAmount =
getLiquidityForAmounts(
amount0,
amount1,
positionDetails.priceLower,
positionDetails.priceUpper,
positionDetails.pool
);
(uint256 _amount0, uint256 _amount1) =
unstakePosition(liquidityAmount, positionDetails);
return
collectPosition(
uint128(_amount0),
uint128(_amount1),
positionDetails.tokenId,
positionDetails.positionManager
);
}
/**
* @dev Unstakes a given amount of liquidity from the Uni V3 position
* @param liquidity amount of liquidity to unstake
* @return amount0 token0 amount unstaked
* @return amount1 token1 amount unstaked
*/
function unstakePosition(
uint128 liquidity,
PositionDetails memory positionDetails
) public returns (uint256 amount0, uint256 amount1) {
INonfungiblePositionManager positionManager =
INonfungiblePositionManager(positionDetails.positionManager);
(uint256 _amount0, uint256 _amount1) =
getAmountsForLiquidity(
liquidity,
positionDetails.priceLower,
positionDetails.priceUpper,
positionDetails.pool
);
(amount0, amount1) = positionManager.decreaseLiquidity(
INonfungiblePositionManager.DecreaseLiquidityParams({
tokenId: positionDetails.tokenId,
liquidity: liquidity,
amount0Min: _amount0.sub(_amount0.div(MINT_BURN_SLIPPAGE)),
amount1Min: _amount1.sub(_amount1.div(MINT_BURN_SLIPPAGE)),
deadline: block.timestamp
})
);
}
/**
* @dev Collect token amounts from pool position
*/
function collectPosition(
uint128 amount0,
uint128 amount1,
uint256 tokenId,
address positionManager
) public returns (uint256 collected0, uint256 collected1) {
(collected0, collected1) = INonfungiblePositionManager(positionManager)
.collect(
INonfungiblePositionManager.CollectParams({
tokenId: tokenId,
recipient: address(this),
amount0Max: amount0,
amount1Max: amount1
})
);
}
/**
* @dev Creates the NFT token representing the pool position
* @dev Mint initial liquidity
*/
function createPosition(
uint256 amount0,
uint256 amount1,
address positionManager,
TokenDetails memory tokenDetails,
PositionDetails memory positionDetails
) public returns (uint256 _tokenId) {
(_tokenId, , , ) = INonfungiblePositionManager(positionManager).mint(
INonfungiblePositionManager.MintParams({
token0: tokenDetails.token0,
token1: tokenDetails.token1,
fee: positionDetails.poolFee,
tickLower: getTickFromPrice(positionDetails.priceLower),
tickUpper: getTickFromPrice(positionDetails.priceUpper),
amount0Desired: amount0,
amount1Desired: amount1,
amount0Min: amount0.sub(amount0.div(MINT_BURN_SLIPPAGE)),
amount1Min: amount1.sub(amount1.div(MINT_BURN_SLIPPAGE)),
recipient: address(this),
deadline: block.timestamp
})
);
}
/**
* @dev burn NFT representing a pool position with tokenId
* @dev uses NFT Position Manager
*/
function burn(address positionManager, uint256 tokenId) public {
INonfungiblePositionManager(positionManager).burn(tokenId);
}
/* ========================================================================================= */
/* xU3LP / xAssetCLR Helpers */
/* ========================================================================================= */
function provideOrRemoveLiquidity(
TokenDetails memory tokenDetails,
PositionDetails memory positionDetails
) private {
(uint256 bufferToken0Balance, uint256 bufferToken1Balance) =
getBufferTokenBalance(tokenDetails);
(uint256 targetToken0Balance, uint256 targetToken1Balance) =
getTargetBufferTokenBalance(tokenDetails, positionDetails);
uint256 bufferBalance = bufferToken0Balance.add(bufferToken1Balance);
uint256 targetBalance = targetToken0Balance.add(targetToken1Balance);
uint256 amount0 = subAbs(bufferToken0Balance, targetToken0Balance);
uint256 amount1 = subAbs(bufferToken1Balance, targetToken1Balance);
amount0 = getToken0AmountInNativeDecimals(
amount0,
tokenDetails.token0Decimals,
tokenDetails.token0DecimalMultiplier
);
amount1 = getToken1AmountInNativeDecimals(
amount1,
tokenDetails.token1Decimals,
tokenDetails.token1DecimalMultiplier
);
(amount0, amount1) = checkIfAmountsMatchAndSwap(
true,
amount0,
amount1,
positionDetails,
tokenDetails
);
if (amount0 == 0 || amount1 == 0) {
return;
}
if (bufferBalance > targetBalance) {
stake(
amount0,
amount1,
positionDetails.positionManager,
positionDetails.tokenId
);
} else if (bufferBalance < targetBalance) {
unstake(amount0, amount1, positionDetails);
}
}
/**
* @dev Admin function to stake tokens
* @dev used in case there's leftover tokens in the contract
*/
function adminRebalance(
TokenDetails memory tokenDetails,
PositionDetails memory positionDetails
) private {
(uint256 token0Balance, uint256 token1Balance) =
getBufferTokenBalance(tokenDetails);
(uint256 stakeAmount0, uint256 stakeAmount1) =
checkIfAmountsMatchAndSwap(
false,
token0Balance,
token1Balance,
positionDetails,
tokenDetails
);
require(
stakeAmount0 != 0 && stakeAmount1 != 0,
"Rebalance amounts are 0"
);
stake(
stakeAmount0,
stakeAmount1,
positionDetails.positionManager,
positionDetails.tokenId
);
}
/**
* @dev Check if token amounts match before attempting rebalance in xAssetCLR
* @dev Uniswap contract requires deposits at a precise token ratio
* @dev If they don't match, swap the tokens so as to deposit as much as possible
* @param xU3LP true if called from xU3LP, false if from xAssetCLR
* @param amount0ToMint how much token0 amount we want to deposit/withdraw
* @param amount1ToMint how much token1 amount we want to deposit/withdraw
*/
function checkIfAmountsMatchAndSwap(
bool xU3LP,
uint256 amount0ToMint,
uint256 amount1ToMint,
PositionDetails memory positionDetails,
TokenDetails memory tokenDetails
) public returns (uint256 amount0, uint256 amount1) {
(uint256 amount0Minted, uint256 amount1Minted) =
calculatePoolMintedAmounts(
amount0ToMint,
amount1ToMint,
positionDetails.priceLower,
positionDetails.priceUpper,
positionDetails.pool
);
if (
amount0Minted <
amount0ToMint.sub(amount0ToMint.div(MINT_BURN_SLIPPAGE)) ||
amount1Minted <
amount1ToMint.sub(amount1ToMint.div(MINT_BURN_SLIPPAGE))
) {
// calculate liquidity ratio =
// minted liquidity / total pool liquidity
// used to calculate swap impact in pool
uint256 mintLiquidity =
getLiquidityForAmounts(
amount0ToMint,
amount1ToMint,
positionDetails.priceLower,
positionDetails.priceUpper,
positionDetails.pool
);
uint256 poolLiquidity = getPoolLiquidity(positionDetails.pool);
int128 liquidityRatio =
poolLiquidity == 0
? 0
: int128(ABDKMath64x64.divuu(mintLiquidity, poolLiquidity));
(amount0, amount1) = restoreTokenRatios(
xU3LP,
liquidityRatio,
AmountsMinted({
amount0ToMint: amount0ToMint,
amount1ToMint: amount1ToMint,
amount0Minted: amount0Minted,
amount1Minted: amount1Minted
}),
tokenDetails,
positionDetails
);
} else {
(amount0, amount1) = (amount0ToMint, amount1ToMint);
}
}
/**
* @dev Swap tokens in xAssetCLR so as to keep a ratio which is required for
* @dev depositing/withdrawing liquidity to/from Uniswap pool
* @param xU3LP true if called from xU3LP, false if from xAssetCLR
*/
function restoreTokenRatios(
bool xU3LP,
int128 liquidityRatio,
AmountsMinted memory amountsMinted,
TokenDetails memory tokenDetails,
PositionDetails memory positionDetails
) private returns (uint256 amount0, uint256 amount1) {
// after normalization, returned swap amount will be in wei representation
uint256 swapAmount =
Utils.calculateSwapAmount(
getToken0AmountInWei(
amountsMinted.amount0ToMint,
tokenDetails.token0Decimals,
tokenDetails.token0DecimalMultiplier
),
getToken1AmountInWei(
amountsMinted.amount1ToMint,
tokenDetails.token1Decimals,
tokenDetails.token1DecimalMultiplier
),
getToken0AmountInWei(
amountsMinted.amount0Minted,
tokenDetails.token0Decimals,
tokenDetails.token0DecimalMultiplier
),
getToken1AmountInWei(
amountsMinted.amount1Minted,
tokenDetails.token1Decimals,
tokenDetails.token1DecimalMultiplier
),
liquidityRatio
);
if (swapAmount == 0) {
return (amountsMinted.amount0ToMint, amountsMinted.amount1ToMint);
}
uint256 swapAmountWithSlippage =
swapAmount.add(swapAmount.div(SWAP_SLIPPAGE));
uint256 mul1 =
amountsMinted.amount0ToMint.mul(amountsMinted.amount1Minted);
uint256 mul2 =
amountsMinted.amount1ToMint.mul(amountsMinted.amount0Minted);
(uint256 balance0, uint256 balance1) =
getBufferTokenBalance(tokenDetails);
if (mul1 > mul2) {
if (balance0 < swapAmountWithSlippage) {
// withdraw enough balance to swap
withdrawSingleToken(
true,
swapAmountWithSlippage,
tokenDetails,
positionDetails
);
xU3LP
? provideOrRemoveLiquidity(tokenDetails, positionDetails)
: adminRebalance(tokenDetails, positionDetails);
return (0, 0);
}
// Swap tokens
swapToken0ForToken1(
swapAmountWithSlippage,
swapAmount,
positionDetails.poolFee,
positionDetails.router,
tokenDetails
);
amount0 = amountsMinted.amount0ToMint.sub(
getToken0AmountInNativeDecimals(
swapAmount,
tokenDetails.token0Decimals,
tokenDetails.token0DecimalMultiplier
)
);
amount1 = amountsMinted.amount1ToMint.add(
getToken1AmountInNativeDecimals(
swapAmount,
tokenDetails.token1Decimals,
tokenDetails.token1DecimalMultiplier
)
);
} else if (mul1 < mul2) {
if (balance1 < swapAmountWithSlippage) {
// withdraw enough balance to swap
withdrawSingleToken(
false,
swapAmountWithSlippage,
tokenDetails,
positionDetails
);
provideOrRemoveLiquidity(tokenDetails, positionDetails);
return (0, 0);
}
// Swap tokens
swapToken1ForToken0(
swapAmountWithSlippage,
swapAmount,
positionDetails.poolFee,
positionDetails.router,
tokenDetails
);
amount0 = amountsMinted.amount0ToMint.add(
getToken0AmountInNativeDecimals(
swapAmount,
tokenDetails.token0Decimals,
tokenDetails.token0DecimalMultiplier
)
);
amount1 = amountsMinted.amount1ToMint.sub(
getToken1AmountInNativeDecimals(
swapAmount,
tokenDetails.token1Decimals,
tokenDetails.token1DecimalMultiplier
)
);
}
}
/**
* @dev Withdraw until token0 or token1 balance reaches amount
* @param forToken0 withdraw balance for token0 (true) or token1 (false)
* @param amount minimum amount we want to have in token0 or token1
*/
function withdrawSingleToken(
bool forToken0,
uint256 amount,
TokenDetails memory tokenDetails,
PositionDetails memory positionDetails
) private {
uint256 balance;
uint256 unstakeAmount0;
uint256 unstakeAmount1;
uint256 swapAmount;
IERC20 token0 = IERC20(tokenDetails.token0);
IERC20 token1 = IERC20(tokenDetails.token1);
do {
// calculate how much we can withdraw
(unstakeAmount0, unstakeAmount1) = calculatePoolMintedAmounts(
getToken0AmountInNativeDecimals(
amount,
tokenDetails.token0Decimals,
tokenDetails.token0DecimalMultiplier
),
getToken1AmountInNativeDecimals(
amount,
tokenDetails.token1Decimals,
tokenDetails.token1DecimalMultiplier
),
positionDetails.priceLower,
positionDetails.priceUpper,
positionDetails.pool
);
// withdraw both tokens
unstake(unstakeAmount0, unstakeAmount1, positionDetails);
// swap the excess amount of token0 for token1 or vice-versa
swapAmount = forToken0
? getToken1AmountInWei(
unstakeAmount1,
tokenDetails.token1Decimals,
tokenDetails.token1DecimalMultiplier
)
: getToken0AmountInWei(
unstakeAmount0,
tokenDetails.token0Decimals,
tokenDetails.token0DecimalMultiplier
);
forToken0
? swapToken1ForToken0(
swapAmount.add(swapAmount.div(SWAP_SLIPPAGE)),
swapAmount,
positionDetails.poolFee,
positionDetails.router,
tokenDetails
)
: swapToken0ForToken1(
swapAmount.add(swapAmount.div(SWAP_SLIPPAGE)),
swapAmount,
positionDetails.poolFee,
positionDetails.router,
tokenDetails
);
balance = forToken0
? getBufferToken0Balance(
token0,
tokenDetails.token0Decimals,
tokenDetails.token0DecimalMultiplier
)
: getBufferToken1Balance(
token1,
tokenDetails.token1Decimals,
tokenDetails.token1DecimalMultiplier
);
} while (balance < amount);
}
/**
* @dev Get token balances in xU3LP/xAssetCLR contract
* @dev returned balances are in wei representation
*/
function getBufferTokenBalance(TokenDetails memory tokenDetails)
public
view
returns (uint256 amount0, uint256 amount1)
{
IERC20 token0 = IERC20(tokenDetails.token0);
IERC20 token1 = IERC20(tokenDetails.token1);
return (
getBufferToken0Balance(
token0,
tokenDetails.token0Decimals,
tokenDetails.token0DecimalMultiplier
),
getBufferToken1Balance(
token1,
tokenDetails.token1Decimals,
tokenDetails.token1DecimalMultiplier
)
);
}
// Get token balances in the position
function getStakedTokenBalance(
TokenDetails memory tokenDetails,
PositionDetails memory positionDetails
) public view returns (uint256 amount0, uint256 amount1) {
(amount0, amount1) = getAmountsForLiquidity(
getPositionLiquidity(
positionDetails.positionManager,
positionDetails.tokenId
),
positionDetails.priceLower,
positionDetails.priceUpper,
positionDetails.pool
);
amount0 = getToken0AmountInWei(
amount0,
tokenDetails.token0Decimals,
tokenDetails.token0DecimalMultiplier
);
amount1 = getToken1AmountInWei(
amount1,
tokenDetails.token1Decimals,
tokenDetails.token1DecimalMultiplier
);
}
// Get wanted xU3LP contract token balance - 5% of NAV
function getTargetBufferTokenBalance(
TokenDetails memory tokenDetails,
PositionDetails memory positionDetails
) public view returns (uint256 amount0, uint256 amount1) {
(uint256 bufferAmount0, uint256 bufferAmount1) =
getBufferTokenBalance(tokenDetails);
(uint256 poolAmount0, uint256 poolAmount1) =
getStakedTokenBalance(tokenDetails, positionDetails);
amount0 = bufferAmount0.add(poolAmount0).div(BUFFER_TARGET);
amount1 = bufferAmount1.add(poolAmount1).div(BUFFER_TARGET);
// Keep 50:50 ratio
amount0 = amount0.add(amount1).div(2);
amount1 = amount0;
}
/**
* @dev Get token0 balance in xAssetCLR
*/
function getBufferToken0Balance(
IERC20 token0,
uint8 token0Decimals,
uint256 token0DecimalMultiplier
) public view returns (uint256 amount0) {
return
getToken0AmountInWei(
token0.balanceOf(address(this)),
token0Decimals,
token0DecimalMultiplier
);
}
/**
* @dev Get token1 balance in xAssetCLR
*/
function getBufferToken1Balance(
IERC20 token1,
uint8 token1Decimals,
uint256 token1DecimalMultiplier
) public view returns (uint256 amount1) {
return
getToken1AmountInWei(
token1.balanceOf(address(this)),
token1Decimals,
token1DecimalMultiplier
);
}
/* ========================================================================================= */
/* Miscellaneous */
/* ========================================================================================= */
/**
* @dev Returns token0 amount in token0Decimals
*/
function getToken0AmountInNativeDecimals(
uint256 amount,
uint8 token0Decimals,
uint256 token0DecimalMultiplier
) public pure returns (uint256) {
if (token0Decimals < TOKEN_DECIMAL_REPRESENTATION) {
amount = amount.div(token0DecimalMultiplier);
}
return amount;
}
/**
* @dev Returns token1 amount in token1Decimals
*/
function getToken1AmountInNativeDecimals(
uint256 amount,
uint8 token1Decimals,
uint256 token1DecimalMultiplier
) public pure returns (uint256) {
if (token1Decimals < TOKEN_DECIMAL_REPRESENTATION) {
amount = amount.div(token1DecimalMultiplier);
}
return amount;
}
/**
* @dev Returns token0 amount in TOKEN_DECIMAL_REPRESENTATION
*/
function getToken0AmountInWei(
uint256 amount,
uint8 token0Decimals,
uint256 token0DecimalMultiplier
) public pure returns (uint256) {
if (token0Decimals < TOKEN_DECIMAL_REPRESENTATION) {
amount = amount.mul(token0DecimalMultiplier);
}
return amount;
}
/**
* @dev Returns token1 amount in TOKEN_DECIMAL_REPRESENTATION
*/
function getToken1AmountInWei(
uint256 amount,
uint8 token1Decimals,
uint256 token1DecimalMultiplier
) public pure returns (uint256) {
if (token1Decimals < TOKEN_DECIMAL_REPRESENTATION) {
amount = amount.mul(token1DecimalMultiplier);
}
return amount;
}
/**
* @dev get price from tick
*/
function getSqrtRatio(int24 tick) public pure returns (uint160) {
return TickMath.getSqrtRatioAtTick(tick);
}
/**
* @dev get tick from price
*/
function getTickFromPrice(uint160 price) public pure returns (int24) {
return TickMath.getTickAtSqrtRatio(price);
}
/**
* @dev Subtract two numbers and return absolute value
*/
function subAbs(uint256 amount0, uint256 amount1)
public
pure
returns (uint256)
{
return amount0 >= amount1 ? amount0.sub(amount1) : amount1.sub(amount0);
}
// Subtract two numbers and return 0 if result is < 0
function sub0(uint256 amount0, uint256 amount1)
public
pure
returns (uint256)
{
return amount0 >= amount1 ? amount0.sub(amount1) : 0;
}
function calculateFee(uint256 _value, uint256 _feeDivisor)
public
pure
returns (uint256 fee)
{
if (_feeDivisor > 0) {
fee = _value.div(_feeDivisor);
}
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.7.6;
/**
Contract which implements locking of functions via a notLocked modifier
Functions are locked per address.
*/
contract BlockLock {
// how many blocks are the functions locked for
uint256 private constant BLOCK_LOCK_COUNT = 6;
// last block for which this address is timelocked
mapping(address => uint256) public lastLockedBlock;
function lock(address _address) internal {
lastLockedBlock[_address] = block.number + BLOCK_LOCK_COUNT;
}
modifier notLocked(address lockedAddress) {
require(lastLockedBlock[lockedAddress] <= block.number);
_;
}
}
//SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
interface IxTokenManager {
/**
* @dev Add a manager to an xAsset fund
*/
function addManager(address manager, address fund) external;
/**
* @dev Remove a manager from an xAsset fund
*/
function removeManager(address manager, address fund) external;
/**
* @dev Check if an address is a manager for a fund
*/
function isManager(address manager, address fund)
external
view
returns (bool);
/**
* @dev Set revenue controller
*/
function setRevenueController(address controller) external;
/**
* @dev Check if address is revenue controller
*/
function isRevenueController(address caller) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../proxy/Initializable.sol";
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMathUpgradeable {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;
pragma abicoder v2;
import '@openzeppelin/contracts/token/ERC721/IERC721Metadata.sol';
import '@openzeppelin/contracts/token/ERC721/IERC721Enumerable.sol';
import './IPoolInitializer.sol';
import './IERC721Permit.sol';
import './IPeripheryImmutableState.sol';
import '../libraries/PoolAddress.sol';
/// @title Non-fungible token for positions
/// @notice Wraps Uniswap V3 positions in a non-fungible token interface which allows for them to be transferred
/// and authorized.
interface INonfungiblePositionManager is
IPoolInitializer,
IPeripheryImmutableState,
IERC721Metadata,
IERC721Enumerable,
IERC721Permit
{
/// @notice Emitted when liquidity is increased for a position NFT
/// @dev Also emitted when a token is minted
/// @param tokenId The ID of the token for which liquidity was increased
/// @param liquidity The amount by which liquidity for the NFT position was increased
/// @param amount0 The amount of token0 that was paid for the increase in liquidity
/// @param amount1 The amount of token1 that was paid for the increase in liquidity
event IncreaseLiquidity(uint256 indexed tokenId, uint128 liquidity, uint256 amount0, uint256 amount1);
/// @notice Emitted when liquidity is decreased for a position NFT
/// @param tokenId The ID of the token for which liquidity was decreased
/// @param liquidity The amount by which liquidity for the NFT position was decreased
/// @param amount0 The amount of token0 that was accounted for the decrease in liquidity
/// @param amount1 The amount of token1 that was accounted for the decrease in liquidity
event DecreaseLiquidity(uint256 indexed tokenId, uint128 liquidity, uint256 amount0, uint256 amount1);
/// @notice Emitted when tokens are collected for a position NFT
/// @dev The amounts reported may not be exactly equivalent to the amounts transferred, due to rounding behavior
/// @param tokenId The ID of the token for which underlying tokens were collected
/// @param recipient The address of the account that received the collected tokens
/// @param amount0 The amount of token0 owed to the position that was collected
/// @param amount1 The amount of token1 owed to the position that was collected
event Collect(uint256 indexed tokenId, address recipient, uint256 amount0, uint256 amount1);
/// @notice Returns the position information associated with a given token ID.
/// @dev Throws if the token ID is not valid.
/// @param tokenId The ID of the token that represents the position
/// @return nonce The nonce for permits
/// @return operator The address that is approved for spending
/// @return token0 The address of the token0 for a specific pool
/// @return token1 The address of the token1 for a specific pool
/// @return fee The fee associated with the pool
/// @return tickLower The lower end of the tick range for the position
/// @return tickUpper The higher end of the tick range for the position
/// @return liquidity The liquidity of the position
/// @return feeGrowthInside0LastX128 The fee growth of token0 as of the last action on the individual position
/// @return feeGrowthInside1LastX128 The fee growth of token1 as of the last action on the individual position
/// @return tokensOwed0 The uncollected amount of token0 owed to the position as of the last computation
/// @return tokensOwed1 The uncollected amount of token1 owed to the position as of the last computation
function positions(uint256 tokenId)
external
view
returns (
uint96 nonce,
address operator,
address token0,
address token1,
uint24 fee,
int24 tickLower,
int24 tickUpper,
uint128 liquidity,
uint256 feeGrowthInside0LastX128,
uint256 feeGrowthInside1LastX128,
uint128 tokensOwed0,
uint128 tokensOwed1
);
struct MintParams {
address token0;
address token1;
uint24 fee;
int24 tickLower;
int24 tickUpper;
uint256 amount0Desired;
uint256 amount1Desired;
uint256 amount0Min;
uint256 amount1Min;
address recipient;
uint256 deadline;
}
/// @notice Creates a new position wrapped in a NFT
/// @dev Call this when the pool does exist and is initialized. Note that if the pool is created but not initialized
/// a method does not exist, i.e. the pool is assumed to be initialized.
/// @param params The params necessary to mint a position, encoded as `MintParams` in calldata
/// @return tokenId The ID of the token that represents the minted position
/// @return liquidity The amount of liquidity for this position
/// @return amount0 The amount of token0
/// @return amount1 The amount of token1
function mint(MintParams calldata params)
external
payable
returns (
uint256 tokenId,
uint128 liquidity,
uint256 amount0,
uint256 amount1
);
struct IncreaseLiquidityParams {
uint256 tokenId;
uint256 amount0Desired;
uint256 amount1Desired;
uint256 amount0Min;
uint256 amount1Min;
uint256 deadline;
}
/// @notice Increases the amount of liquidity in a position, with tokens paid by the `msg.sender`
/// @param params tokenId The ID of the token for which liquidity is being increased,
/// amount0Desired The desired amount of token0 to be spent,
/// amount1Desired The desired amount of token1 to be spent,
/// amount0Min The minimum amount of token0 to spend, which serves as a slippage check,
/// amount1Min The minimum amount of token1 to spend, which serves as a slippage check,
/// deadline The time by which the transaction must be included to effect the change
/// @return liquidity The new liquidity amount as a result of the increase
/// @return amount0 The amount of token0 to acheive resulting liquidity
/// @return amount1 The amount of token1 to acheive resulting liquidity
function increaseLiquidity(IncreaseLiquidityParams calldata params)
external
payable
returns (
uint128 liquidity,
uint256 amount0,
uint256 amount1
);
struct DecreaseLiquidityParams {
uint256 tokenId;
uint128 liquidity;
uint256 amount0Min;
uint256 amount1Min;
uint256 deadline;
}
/// @notice Decreases the amount of liquidity in a position and accounts it to the position
/// @param params tokenId The ID of the token for which liquidity is being decreased,
/// amount The amount by which liquidity will be decreased,
/// amount0Min The minimum amount of token0 that should be accounted for the burned liquidity,
/// amount1Min The minimum amount of token1 that should be accounted for the burned liquidity,
/// deadline The time by which the transaction must be included to effect the change
/// @return amount0 The amount of token0 accounted to the position's tokens owed
/// @return amount1 The amount of token1 accounted to the position's tokens owed
function decreaseLiquidity(DecreaseLiquidityParams calldata params)
external
payable
returns (uint256 amount0, uint256 amount1);
struct CollectParams {
uint256 tokenId;
address recipient;
uint128 amount0Max;
uint128 amount1Max;
}
/// @notice Collects up to a maximum amount of fees owed to a specific position to the recipient
/// @param params tokenId The ID of the NFT for which tokens are being collected,
/// recipient The account that should receive the tokens,
/// amount0Max The maximum amount of token0 to collect,
/// amount1Max The maximum amount of token1 to collect
/// @return amount0 The amount of fees collected in token0
/// @return amount1 The amount of fees collected in token1
function collect(CollectParams calldata params) external payable returns (uint256 amount0, uint256 amount1);
/// @notice Burns a token ID, which deletes it from the NFT contract. The token must have 0 liquidity and all tokens
/// must be collected first.
/// @param tokenId The ID of the token that is being burned
function burn(uint256 tokenId) external payable;
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;
pragma abicoder v2;
import '@uniswap/v3-core/contracts/interfaces/callback/IUniswapV3SwapCallback.sol';
/// @title Router token swapping functionality
/// @notice Functions for swapping tokens via Uniswap V3
interface ISwapRouter is IUniswapV3SwapCallback {
struct ExactInputSingleParams {
address tokenIn;
address tokenOut;
uint24 fee;
address recipient;
uint256 deadline;
uint256 amountIn;
uint256 amountOutMinimum;
uint160 sqrtPriceLimitX96;
}
/// @notice Swaps `amountIn` of one token for as much as possible of another token
/// @param params The parameters necessary for the swap, encoded as `ExactInputSingleParams` in calldata
/// @return amountOut The amount of the received token
function exactInputSingle(ExactInputSingleParams calldata params) external payable returns (uint256 amountOut);
struct ExactInputParams {
bytes path;
address recipient;
uint256 deadline;
uint256 amountIn;
uint256 amountOutMinimum;
}
/// @notice Swaps `amountIn` of one token for as much as possible of another along the specified path
/// @param params The parameters necessary for the multi-hop swap, encoded as `ExactInputParams` in calldata
/// @return amountOut The amount of the received token
function exactInput(ExactInputParams calldata params) external payable returns (uint256 amountOut);
struct ExactOutputSingleParams {
address tokenIn;
address tokenOut;
uint24 fee;
address recipient;
uint256 deadline;
uint256 amountOut;
uint256 amountInMaximum;
uint160 sqrtPriceLimitX96;
}
/// @notice Swaps as little as possible of one token for `amountOut` of another token
/// @param params The parameters necessary for the swap, encoded as `ExactOutputSingleParams` in calldata
/// @return amountIn The amount of the input token
function exactOutputSingle(ExactOutputSingleParams calldata params) external payable returns (uint256 amountIn);
struct ExactOutputParams {
bytes path;
address recipient;
uint256 deadline;
uint256 amountOut;
uint256 amountInMaximum;
}
/// @notice Swaps as little as possible of one token for `amountOut` of another along the specified path (reversed)
/// @param params The parameters necessary for the multi-hop swap, encoded as `ExactOutputParams` in calldata
/// @return amountIn The amount of the input token
function exactOutput(ExactOutputParams calldata params) external payable returns (uint256 amountIn);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
import '@uniswap/v3-core/contracts/libraries/FullMath.sol';
import '@uniswap/v3-core/contracts/libraries/FixedPoint96.sol';
/// @title Liquidity amount functions
/// @notice Provides functions for computing liquidity amounts from token amounts and prices
library LiquidityAmounts {
/// @notice Downcasts uint256 to uint128
/// @param x The uint258 to be downcasted
/// @return y The passed value, downcasted to uint128
function toUint128(uint256 x) private pure returns (uint128 y) {
require((y = uint128(x)) == x);
}
/// @notice Computes the amount of liquidity received for a given amount of token0 and price range
/// @dev Calculates amount0 * (sqrt(upper) * sqrt(lower)) / (sqrt(upper) - sqrt(lower))
/// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
/// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
/// @param amount0 The amount0 being sent in
/// @return liquidity The amount of returned liquidity
function getLiquidityForAmount0(
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
uint256 amount0
) internal pure returns (uint128 liquidity) {
if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
uint256 intermediate = FullMath.mulDiv(sqrtRatioAX96, sqrtRatioBX96, FixedPoint96.Q96);
return toUint128(FullMath.mulDiv(amount0, intermediate, sqrtRatioBX96 - sqrtRatioAX96));
}
/// @notice Computes the amount of liquidity received for a given amount of token1 and price range
/// @dev Calculates amount1 / (sqrt(upper) - sqrt(lower)).
/// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
/// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
/// @param amount1 The amount1 being sent in
/// @return liquidity The amount of returned liquidity
function getLiquidityForAmount1(
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
uint256 amount1
) internal pure returns (uint128 liquidity) {
if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
return toUint128(FullMath.mulDiv(amount1, FixedPoint96.Q96, sqrtRatioBX96 - sqrtRatioAX96));
}
/// @notice Computes the maximum amount of liquidity received for a given amount of token0, token1, the current
/// pool prices and the prices at the tick boundaries
/// @param sqrtRatioX96 A sqrt price representing the current pool prices
/// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
/// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
/// @param amount0 The amount of token0 being sent in
/// @param amount1 The amount of token1 being sent in
/// @return liquidity The maximum amount of liquidity received
function getLiquidityForAmounts(
uint160 sqrtRatioX96,
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
uint256 amount0,
uint256 amount1
) internal pure returns (uint128 liquidity) {
if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
if (sqrtRatioX96 <= sqrtRatioAX96) {
liquidity = getLiquidityForAmount0(sqrtRatioAX96, sqrtRatioBX96, amount0);
} else if (sqrtRatioX96 < sqrtRatioBX96) {
uint128 liquidity0 = getLiquidityForAmount0(sqrtRatioX96, sqrtRatioBX96, amount0);
uint128 liquidity1 = getLiquidityForAmount1(sqrtRatioAX96, sqrtRatioX96, amount1);
liquidity = liquidity0 < liquidity1 ? liquidity0 : liquidity1;
} else {
liquidity = getLiquidityForAmount1(sqrtRatioAX96, sqrtRatioBX96, amount1);
}
}
/// @notice Computes the amount of token0 for a given amount of liquidity and a price range
/// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
/// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
/// @param liquidity The liquidity being valued
/// @return amount0 The amount of token0
function getAmount0ForLiquidity(
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
uint128 liquidity
) internal pure returns (uint256 amount0) {
if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
return
FullMath.mulDiv(
uint256(liquidity) << FixedPoint96.RESOLUTION,
sqrtRatioBX96 - sqrtRatioAX96,
sqrtRatioBX96
) / sqrtRatioAX96;
}
/// @notice Computes the amount of token1 for a given amount of liquidity and a price range
/// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
/// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
/// @param liquidity The liquidity being valued
/// @return amount1 The amount of token1
function getAmount1ForLiquidity(
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
uint128 liquidity
) internal pure returns (uint256 amount1) {
if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
return FullMath.mulDiv(liquidity, sqrtRatioBX96 - sqrtRatioAX96, FixedPoint96.Q96);
}
/// @notice Computes the token0 and token1 value for a given amount of liquidity, the current
/// pool prices and the prices at the tick boundaries
/// @param sqrtRatioX96 A sqrt price representing the current pool prices
/// @param sqrtRatioAX96 A sqrt price representing the first tick boundary
/// @param sqrtRatioBX96 A sqrt price representing the second tick boundary
/// @param liquidity The liquidity being valued
/// @return amount0 The amount of token0
/// @return amount1 The amount of token1
function getAmountsForLiquidity(
uint160 sqrtRatioX96,
uint160 sqrtRatioAX96,
uint160 sqrtRatioBX96,
uint128 liquidity
) internal pure returns (uint256 amount0, uint256 amount1) {
if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96);
if (sqrtRatioX96 <= sqrtRatioAX96) {
amount0 = getAmount0ForLiquidity(sqrtRatioAX96, sqrtRatioBX96, liquidity);
} else if (sqrtRatioX96 < sqrtRatioBX96) {
amount0 = getAmount0ForLiquidity(sqrtRatioX96, sqrtRatioBX96, liquidity);
amount1 = getAmount1ForLiquidity(sqrtRatioAX96, sqrtRatioX96, liquidity);
} else {
amount1 = getAmount1ForLiquidity(sqrtRatioAX96, sqrtRatioBX96, liquidity);
}
}
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
import './pool/IUniswapV3PoolImmutables.sol';
import './pool/IUniswapV3PoolState.sol';
import './pool/IUniswapV3PoolDerivedState.sol';
import './pool/IUniswapV3PoolActions.sol';
import './pool/IUniswapV3PoolOwnerActions.sol';
import './pool/IUniswapV3PoolEvents.sol';
/// @title The interface for a Uniswap V3 Pool
/// @notice A Uniswap pool facilitates swapping and automated market making between any two assets that strictly conform
/// to the ERC20 specification
/// @dev The pool interface is broken up into many smaller pieces
interface IUniswapV3Pool is
IUniswapV3PoolImmutables,
IUniswapV3PoolState,
IUniswapV3PoolDerivedState,
IUniswapV3PoolActions,
IUniswapV3PoolOwnerActions,
IUniswapV3PoolEvents
{
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Math library for computing sqrt prices from ticks and vice versa
/// @notice Computes sqrt price for ticks of size 1.0001, i.e. sqrt(1.0001^tick) as fixed point Q64.96 numbers. Supports
/// prices between 2**-128 and 2**128
library TickMath {
/// @dev The minimum tick that may be passed to #getSqrtRatioAtTick computed from log base 1.0001 of 2**-128
int24 internal constant MIN_TICK = -887272;
/// @dev The maximum tick that may be passed to #getSqrtRatioAtTick computed from log base 1.0001 of 2**128
int24 internal constant MAX_TICK = -MIN_TICK;
/// @dev The minimum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MIN_TICK)
uint160 internal constant MIN_SQRT_RATIO = 4295128739;
/// @dev The maximum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MAX_TICK)
uint160 internal constant MAX_SQRT_RATIO = 1461446703485210103287273052203988822378723970342;
/// @notice Calculates sqrt(1.0001^tick) * 2^96
/// @dev Throws if |tick| > max tick
/// @param tick The input tick for the above formula
/// @return sqrtPriceX96 A Fixed point Q64.96 number representing the sqrt of the ratio of the two assets (token1/token0)
/// at the given tick
function getSqrtRatioAtTick(int24 tick) internal pure returns (uint160 sqrtPriceX96) {
uint256 absTick = tick < 0 ? uint256(-int256(tick)) : uint256(int256(tick));
require(absTick <= uint256(MAX_TICK), 'T');
uint256 ratio = absTick & 0x1 != 0 ? 0xfffcb933bd6fad37aa2d162d1a594001 : 0x100000000000000000000000000000000;
if (absTick & 0x2 != 0) ratio = (ratio * 0xfff97272373d413259a46990580e213a) >> 128;
if (absTick & 0x4 != 0) ratio = (ratio * 0xfff2e50f5f656932ef12357cf3c7fdcc) >> 128;
if (absTick & 0x8 != 0) ratio = (ratio * 0xffe5caca7e10e4e61c3624eaa0941cd0) >> 128;
if (absTick & 0x10 != 0) ratio = (ratio * 0xffcb9843d60f6159c9db58835c926644) >> 128;
if (absTick & 0x20 != 0) ratio = (ratio * 0xff973b41fa98c081472e6896dfb254c0) >> 128;
if (absTick & 0x40 != 0) ratio = (ratio * 0xff2ea16466c96a3843ec78b326b52861) >> 128;
if (absTick & 0x80 != 0) ratio = (ratio * 0xfe5dee046a99a2a811c461f1969c3053) >> 128;
if (absTick & 0x100 != 0) ratio = (ratio * 0xfcbe86c7900a88aedcffc83b479aa3a4) >> 128;
if (absTick & 0x200 != 0) ratio = (ratio * 0xf987a7253ac413176f2b074cf7815e54) >> 128;
if (absTick & 0x400 != 0) ratio = (ratio * 0xf3392b0822b70005940c7a398e4b70f3) >> 128;
if (absTick & 0x800 != 0) ratio = (ratio * 0xe7159475a2c29b7443b29c7fa6e889d9) >> 128;
if (absTick & 0x1000 != 0) ratio = (ratio * 0xd097f3bdfd2022b8845ad8f792aa5825) >> 128;
if (absTick & 0x2000 != 0) ratio = (ratio * 0xa9f746462d870fdf8a65dc1f90e061e5) >> 128;
if (absTick & 0x4000 != 0) ratio = (ratio * 0x70d869a156d2a1b890bb3df62baf32f7) >> 128;
if (absTick & 0x8000 != 0) ratio = (ratio * 0x31be135f97d08fd981231505542fcfa6) >> 128;
if (absTick & 0x10000 != 0) ratio = (ratio * 0x9aa508b5b7a84e1c677de54f3e99bc9) >> 128;
if (absTick & 0x20000 != 0) ratio = (ratio * 0x5d6af8dedb81196699c329225ee604) >> 128;
if (absTick & 0x40000 != 0) ratio = (ratio * 0x2216e584f5fa1ea926041bedfe98) >> 128;
if (absTick & 0x80000 != 0) ratio = (ratio * 0x48a170391f7dc42444e8fa2) >> 128;
if (tick > 0) ratio = type(uint256).max / ratio;
// this divides by 1<<32 rounding up to go from a Q128.128 to a Q128.96.
// we then downcast because we know the result always fits within 160 bits due to our tick input constraint
// we round up in the division so getTickAtSqrtRatio of the output price is always consistent
sqrtPriceX96 = uint160((ratio >> 32) + (ratio % (1 << 32) == 0 ? 0 : 1));
}
/// @notice Calculates the greatest tick value such that getRatioAtTick(tick) <= ratio
/// @dev Throws in case sqrtPriceX96 < MIN_SQRT_RATIO, as MIN_SQRT_RATIO is the lowest value getRatioAtTick may
/// ever return.
/// @param sqrtPriceX96 The sqrt ratio for which to compute the tick as a Q64.96
/// @return tick The greatest tick for which the ratio is less than or equal to the input ratio
function getTickAtSqrtRatio(uint160 sqrtPriceX96) internal pure returns (int24 tick) {
// second inequality must be < because the price can never reach the price at the max tick
require(sqrtPriceX96 >= MIN_SQRT_RATIO && sqrtPriceX96 < MAX_SQRT_RATIO, 'R');
uint256 ratio = uint256(sqrtPriceX96) << 32;
uint256 r = ratio;
uint256 msb = 0;
assembly {
let f := shl(7, gt(r, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(6, gt(r, 0xFFFFFFFFFFFFFFFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(5, gt(r, 0xFFFFFFFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(4, gt(r, 0xFFFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(3, gt(r, 0xFF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(2, gt(r, 0xF))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := shl(1, gt(r, 0x3))
msb := or(msb, f)
r := shr(f, r)
}
assembly {
let f := gt(r, 0x1)
msb := or(msb, f)
}
if (msb >= 128) r = ratio >> (msb - 127);
else r = ratio << (127 - msb);
int256 log_2 = (int256(msb) - 128) << 64;
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(63, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(62, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(61, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(60, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(59, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(58, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(57, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(56, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(55, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(54, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(53, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(52, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(51, f))
r := shr(f, r)
}
assembly {
r := shr(127, mul(r, r))
let f := shr(128, r)
log_2 := or(log_2, shl(50, f))
}
int256 log_sqrt10001 = log_2 * 255738958999603826347141; // 128.128 number
int24 tickLow = int24((log_sqrt10001 - 3402992956809132418596140100660247210) >> 128);
int24 tickHi = int24((log_sqrt10001 + 291339464771989622907027621153398088495) >> 128);
tick = tickLow == tickHi ? tickLow : getSqrtRatioAtTick(tickHi) <= sqrtPriceX96 ? tickHi : tickLow;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "./IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "./IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;
pragma abicoder v2;
/// @title Creates and initializes V3 Pools
/// @notice Provides a method for creating and initializing a pool, if necessary, for bundling with other methods that
/// require the pool to exist.
interface IPoolInitializer {
/// @notice Creates a new pool if it does not exist, then initializes if not initialized
/// @dev This method can be bundled with others via IMulticall for the first action (e.g. mint) performed against a pool
/// @param token0 The contract address of token0 of the pool
/// @param token1 The contract address of token1 of the pool
/// @param fee The fee amount of the v3 pool for the specified token pair
/// @param sqrtPriceX96 The initial square root price of the pool as a Q64.96 value
/// @return pool Returns the pool address based on the pair of tokens and fee, will return the newly created pool address if necessary
function createAndInitializePoolIfNecessary(
address token0,
address token1,
uint24 fee,
uint160 sqrtPriceX96
) external payable returns (address pool);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;
import '@openzeppelin/contracts/token/ERC721/IERC721.sol';
/// @title ERC721 with permit
/// @notice Extension to ERC721 that includes a permit function for signature based approvals
interface IERC721Permit is IERC721 {
/// @notice The permit typehash used in the permit signature
/// @return The typehash for the permit
function PERMIT_TYPEHASH() external pure returns (bytes32);
/// @notice The domain separator used in the permit signature
/// @return The domain seperator used in encoding of permit signature
function DOMAIN_SEPARATOR() external view returns (bytes32);
/// @notice Approve of a specific token ID for spending by spender via signature
/// @param spender The account that is being approved
/// @param tokenId The ID of the token that is being approved for spending
/// @param deadline The deadline timestamp by which the call must be mined for the approve to work
/// @param v Must produce valid secp256k1 signature from the holder along with `r` and `s`
/// @param r Must produce valid secp256k1 signature from the holder along with `v` and `s`
/// @param s Must produce valid secp256k1 signature from the holder along with `r` and `v`
function permit(
address spender,
uint256 tokenId,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external payable;
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Immutable state
/// @notice Functions that return immutable state of the router
interface IPeripheryImmutableState {
/// @return Returns the address of the Uniswap V3 factory
function factory() external view returns (address);
/// @return Returns the address of WETH9
function WETH9() external view returns (address);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Provides functions for deriving a pool address from the factory, tokens, and the fee
library PoolAddress {
bytes32 internal constant POOL_INIT_CODE_HASH = 0xc02f72e8ae5e68802e6d893d58ddfb0df89a2f4c9c2f04927db1186a29373660;
/// @notice The identifying key of the pool
struct PoolKey {
address token0;
address token1;
uint24 fee;
}
/// @notice Returns PoolKey: the ordered tokens with the matched fee levels
/// @param tokenA The first token of a pool, unsorted
/// @param tokenB The second token of a pool, unsorted
/// @param fee The fee level of the pool
/// @return Poolkey The pool details with ordered token0 and token1 assignments
function getPoolKey(
address tokenA,
address tokenB,
uint24 fee
) internal pure returns (PoolKey memory) {
if (tokenA > tokenB) (tokenA, tokenB) = (tokenB, tokenA);
return PoolKey({token0: tokenA, token1: tokenB, fee: fee});
}
/// @notice Deterministically computes the pool address given the factory and PoolKey
/// @param factory The Uniswap V3 factory contract address
/// @param key The PoolKey
/// @return pool The contract address of the V3 pool
function computeAddress(address factory, PoolKey memory key) internal pure returns (address pool) {
require(key.token0 < key.token1);
pool = address(
uint256(
keccak256(
abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encode(key.token0, key.token1, key.fee)),
POOL_INIT_CODE_HASH
)
)
)
);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "../../introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Callback for IUniswapV3PoolActions#swap
/// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface
interface IUniswapV3SwapCallback {
/// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap.
/// @dev In the implementation you must pay the pool tokens owed for the swap.
/// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory.
/// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
/// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
/// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
/// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
/// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
/// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
function uniswapV3SwapCallback(
int256 amount0Delta,
int256 amount1Delta,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.4.0;
/// @title Contains 512-bit math functions
/// @notice Facilitates multiplication and division that can have overflow of an intermediate value without any loss of precision
/// @dev Handles "phantom overflow" i.e., allows multiplication and division where an intermediate value overflows 256 bits
library FullMath {
/// @notice Calculates floor(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
/// @param a The multiplicand
/// @param b The multiplier
/// @param denominator The divisor
/// @return result The 256-bit result
/// @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv
function mulDiv(
uint256 a,
uint256 b,
uint256 denominator
) internal pure returns (uint256 result) {
// 512-bit multiply [prod1 prod0] = a * b
// Compute the product mod 2**256 and mod 2**256 - 1
// then use the Chinese Remainder Theorem to reconstruct
// the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2**256 + prod0
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(a, b, not(0))
prod0 := mul(a, b)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division
if (prod1 == 0) {
require(denominator > 0);
assembly {
result := div(prod0, denominator)
}
return result;
}
// Make sure the result is less than 2**256.
// Also prevents denominator == 0
require(denominator > prod1);
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0]
// Compute remainder using mulmod
uint256 remainder;
assembly {
remainder := mulmod(a, b, denominator)
}
// Subtract 256 bit number from 512 bit number
assembly {
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator
// Compute largest power of two divisor of denominator.
// Always >= 1.
uint256 twos = -denominator & denominator;
// Divide denominator by power of two
assembly {
denominator := div(denominator, twos)
}
// Divide [prod1 prod0] by the factors of two
assembly {
prod0 := div(prod0, twos)
}
// Shift in bits from prod1 into prod0. For this we need
// to flip `twos` such that it is 2**256 / twos.
// If twos is zero, then it becomes one
assembly {
twos := add(div(sub(0, twos), twos), 1)
}
prod0 |= prod1 * twos;
// Invert denominator mod 2**256
// Now that denominator is an odd number, it has an inverse
// modulo 2**256 such that denominator * inv = 1 mod 2**256.
// Compute the inverse by starting with a seed that is correct
// correct for four bits. That is, denominator * inv = 1 mod 2**4
uint256 inv = (3 * denominator) ^ 2;
// Now use Newton-Raphson iteration to improve the precision.
// Thanks to Hensel's lifting lemma, this also works in modular
// arithmetic, doubling the correct bits in each step.
inv *= 2 - denominator * inv; // inverse mod 2**8
inv *= 2 - denominator * inv; // inverse mod 2**16
inv *= 2 - denominator * inv; // inverse mod 2**32
inv *= 2 - denominator * inv; // inverse mod 2**64
inv *= 2 - denominator * inv; // inverse mod 2**128
inv *= 2 - denominator * inv; // inverse mod 2**256
// Because the division is now exact we can divide by multiplying
// with the modular inverse of denominator. This will give us the
// correct result modulo 2**256. Since the precoditions guarantee
// that the outcome is less than 2**256, this is the final result.
// We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inv;
return result;
}
/// @notice Calculates ceil(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
/// @param a The multiplicand
/// @param b The multiplier
/// @param denominator The divisor
/// @return result The 256-bit result
function mulDivRoundingUp(
uint256 a,
uint256 b,
uint256 denominator
) internal pure returns (uint256 result) {
result = mulDiv(a, b, denominator);
if (mulmod(a, b, denominator) > 0) {
require(result < type(uint256).max);
result++;
}
}
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.4.0;
/// @title FixedPoint96
/// @notice A library for handling binary fixed point numbers, see https://en.wikipedia.org/wiki/Q_(number_format)
/// @dev Used in SqrtPriceMath.sol
library FixedPoint96 {
uint8 internal constant RESOLUTION = 96;
uint256 internal constant Q96 = 0x1000000000000000000000000;
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Pool state that never changes
/// @notice These parameters are fixed for a pool forever, i.e., the methods will always return the same values
interface IUniswapV3PoolImmutables {
/// @notice The contract that deployed the pool, which must adhere to the IUniswapV3Factory interface
/// @return The contract address
function factory() external view returns (address);
/// @notice The first of the two tokens of the pool, sorted by address
/// @return The token contract address
function token0() external view returns (address);
/// @notice The second of the two tokens of the pool, sorted by address
/// @return The token contract address
function token1() external view returns (address);
/// @notice The pool's fee in hundredths of a bip, i.e. 1e-6
/// @return The fee
function fee() external view returns (uint24);
/// @notice The pool tick spacing
/// @dev Ticks can only be used at multiples of this value, minimum of 1 and always positive
/// e.g.: a tickSpacing of 3 means ticks can be initialized every 3rd tick, i.e., ..., -6, -3, 0, 3, 6, ...
/// This value is an int24 to avoid casting even though it is always positive.
/// @return The tick spacing
function tickSpacing() external view returns (int24);
/// @notice The maximum amount of position liquidity that can use any tick in the range
/// @dev This parameter is enforced per tick to prevent liquidity from overflowing a uint128 at any point, and
/// also prevents out-of-range liquidity from being used to prevent adding in-range liquidity to a pool
/// @return The max amount of liquidity per tick
function maxLiquidityPerTick() external view returns (uint128);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Pool state that can change
/// @notice These methods compose the pool's state, and can change with any frequency including multiple times
/// per transaction
interface IUniswapV3PoolState {
/// @notice The 0th storage slot in the pool stores many values, and is exposed as a single method to save gas
/// when accessed externally.
/// @return sqrtPriceX96 The current price of the pool as a sqrt(token1/token0) Q64.96 value
/// tick The current tick of the pool, i.e. according to the last tick transition that was run.
/// This value may not always be equal to SqrtTickMath.getTickAtSqrtRatio(sqrtPriceX96) if the price is on a tick
/// boundary.
/// observationIndex The index of the last oracle observation that was written,
/// observationCardinality The current maximum number of observations stored in the pool,
/// observationCardinalityNext The next maximum number of observations, to be updated when the observation.
/// feeProtocol The protocol fee for both tokens of the pool.
/// Encoded as two 4 bit values, where the protocol fee of token1 is shifted 4 bits and the protocol fee of token0
/// is the lower 4 bits. Used as the denominator of a fraction of the swap fee, e.g. 4 means 1/4th of the swap fee.
/// unlocked Whether the pool is currently locked to reentrancy
function slot0()
external
view
returns (
uint160 sqrtPriceX96,
int24 tick,
uint16 observationIndex,
uint16 observationCardinality,
uint16 observationCardinalityNext,
uint8 feeProtocol,
bool unlocked
);
/// @notice The fee growth as a Q128.128 fees of token0 collected per unit of liquidity for the entire life of the pool
/// @dev This value can overflow the uint256
function feeGrowthGlobal0X128() external view returns (uint256);
/// @notice The fee growth as a Q128.128 fees of token1 collected per unit of liquidity for the entire life of the pool
/// @dev This value can overflow the uint256
function feeGrowthGlobal1X128() external view returns (uint256);
/// @notice The amounts of token0 and token1 that are owed to the protocol
/// @dev Protocol fees will never exceed uint128 max in either token
function protocolFees() external view returns (uint128 token0, uint128 token1);
/// @notice The currently in range liquidity available to the pool
/// @dev This value has no relationship to the total liquidity across all ticks
function liquidity() external view returns (uint128);
/// @notice Look up information about a specific tick in the pool
/// @param tick The tick to look up
/// @return liquidityGross the total amount of position liquidity that uses the pool either as tick lower or
/// tick upper,
/// liquidityNet how much liquidity changes when the pool price crosses the tick,
/// feeGrowthOutside0X128 the fee growth on the other side of the tick from the current tick in token0,
/// feeGrowthOutside1X128 the fee growth on the other side of the tick from the current tick in token1,
/// tickCumulativeOutside the cumulative tick value on the other side of the tick from the current tick
/// secondsPerLiquidityOutsideX128 the seconds spent per liquidity on the other side of the tick from the current tick,
/// secondsOutside the seconds spent on the other side of the tick from the current tick,
/// initialized Set to true if the tick is initialized, i.e. liquidityGross is greater than 0, otherwise equal to false.
/// Outside values can only be used if the tick is initialized, i.e. if liquidityGross is greater than 0.
/// In addition, these values are only relative and must be used only in comparison to previous snapshots for
/// a specific position.
function ticks(int24 tick)
external
view
returns (
uint128 liquidityGross,
int128 liquidityNet,
uint256 feeGrowthOutside0X128,
uint256 feeGrowthOutside1X128,
int56 tickCumulativeOutside,
uint160 secondsPerLiquidityOutsideX128,
uint32 secondsOutside,
bool initialized
);
/// @notice Returns 256 packed tick initialized boolean values. See TickBitmap for more information
function tickBitmap(int16 wordPosition) external view returns (uint256);
/// @notice Returns the information about a position by the position's key
/// @param key The position's key is a hash of a preimage composed by the owner, tickLower and tickUpper
/// @return _liquidity The amount of liquidity in the position,
/// Returns feeGrowthInside0LastX128 fee growth of token0 inside the tick range as of the last mint/burn/poke,
/// Returns feeGrowthInside1LastX128 fee growth of token1 inside the tick range as of the last mint/burn/poke,
/// Returns tokensOwed0 the computed amount of token0 owed to the position as of the last mint/burn/poke,
/// Returns tokensOwed1 the computed amount of token1 owed to the position as of the last mint/burn/poke
function positions(bytes32 key)
external
view
returns (
uint128 _liquidity,
uint256 feeGrowthInside0LastX128,
uint256 feeGrowthInside1LastX128,
uint128 tokensOwed0,
uint128 tokensOwed1
);
/// @notice Returns data about a specific observation index
/// @param index The element of the observations array to fetch
/// @dev You most likely want to use #observe() instead of this method to get an observation as of some amount of time
/// ago, rather than at a specific index in the array.
/// @return blockTimestamp The timestamp of the observation,
/// Returns tickCumulative the tick multiplied by seconds elapsed for the life of the pool as of the observation timestamp,
/// Returns secondsPerLiquidityCumulativeX128 the seconds per in range liquidity for the life of the pool as of the observation timestamp,
/// Returns initialized whether the observation has been initialized and the values are safe to use
function observations(uint256 index)
external
view
returns (
uint32 blockTimestamp,
int56 tickCumulative,
uint160 secondsPerLiquidityCumulativeX128,
bool initialized
);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Pool state that is not stored
/// @notice Contains view functions to provide information about the pool that is computed rather than stored on the
/// blockchain. The functions here may have variable gas costs.
interface IUniswapV3PoolDerivedState {
/// @notice Returns the cumulative tick and liquidity as of each timestamp `secondsAgo` from the current block timestamp
/// @dev To get a time weighted average tick or liquidity-in-range, you must call this with two values, one representing
/// the beginning of the period and another for the end of the period. E.g., to get the last hour time-weighted average tick,
/// you must call it with secondsAgos = [3600, 0].
/// @dev The time weighted average tick represents the geometric time weighted average price of the pool, in
/// log base sqrt(1.0001) of token1 / token0. The TickMath library can be used to go from a tick value to a ratio.
/// @param secondsAgos From how long ago each cumulative tick and liquidity value should be returned
/// @return tickCumulatives Cumulative tick values as of each `secondsAgos` from the current block timestamp
/// @return secondsPerLiquidityCumulativeX128s Cumulative seconds per liquidity-in-range value as of each `secondsAgos` from the current block
/// timestamp
function observe(uint32[] calldata secondsAgos)
external
view
returns (int56[] memory tickCumulatives, uint160[] memory secondsPerLiquidityCumulativeX128s);
/// @notice Returns a snapshot of the tick cumulative, seconds per liquidity and seconds inside a tick range
/// @dev Snapshots must only be compared to other snapshots, taken over a period for which a position existed.
/// I.e., snapshots cannot be compared if a position is not held for the entire period between when the first
/// snapshot is taken and the second snapshot is taken.
/// @param tickLower The lower tick of the range
/// @param tickUpper The upper tick of the range
/// @return tickCumulativeInside The snapshot of the tick accumulator for the range
/// @return secondsPerLiquidityInsideX128 The snapshot of seconds per liquidity for the range
/// @return secondsInside The snapshot of seconds per liquidity for the range
function snapshotCumulativesInside(int24 tickLower, int24 tickUpper)
external
view
returns (
int56 tickCumulativeInside,
uint160 secondsPerLiquidityInsideX128,
uint32 secondsInside
);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Permissionless pool actions
/// @notice Contains pool methods that can be called by anyone
interface IUniswapV3PoolActions {
/// @notice Sets the initial price for the pool
/// @dev Price is represented as a sqrt(amountToken1/amountToken0) Q64.96 value
/// @param sqrtPriceX96 the initial sqrt price of the pool as a Q64.96
function initialize(uint160 sqrtPriceX96) external;
/// @notice Adds liquidity for the given recipient/tickLower/tickUpper position
/// @dev The caller of this method receives a callback in the form of IUniswapV3MintCallback#uniswapV3MintCallback
/// in which they must pay any token0 or token1 owed for the liquidity. The amount of token0/token1 due depends
/// on tickLower, tickUpper, the amount of liquidity, and the current price.
/// @param recipient The address for which the liquidity will be created
/// @param tickLower The lower tick of the position in which to add liquidity
/// @param tickUpper The upper tick of the position in which to add liquidity
/// @param amount The amount of liquidity to mint
/// @param data Any data that should be passed through to the callback
/// @return amount0 The amount of token0 that was paid to mint the given amount of liquidity. Matches the value in the callback
/// @return amount1 The amount of token1 that was paid to mint the given amount of liquidity. Matches the value in the callback
function mint(
address recipient,
int24 tickLower,
int24 tickUpper,
uint128 amount,
bytes calldata data
) external returns (uint256 amount0, uint256 amount1);
/// @notice Collects tokens owed to a position
/// @dev Does not recompute fees earned, which must be done either via mint or burn of any amount of liquidity.
/// Collect must be called by the position owner. To withdraw only token0 or only token1, amount0Requested or
/// amount1Requested may be set to zero. To withdraw all tokens owed, caller may pass any value greater than the
/// actual tokens owed, e.g. type(uint128).max. Tokens owed may be from accumulated swap fees or burned liquidity.
/// @param recipient The address which should receive the fees collected
/// @param tickLower The lower tick of the position for which to collect fees
/// @param tickUpper The upper tick of the position for which to collect fees
/// @param amount0Requested How much token0 should be withdrawn from the fees owed
/// @param amount1Requested How much token1 should be withdrawn from the fees owed
/// @return amount0 The amount of fees collected in token0
/// @return amount1 The amount of fees collected in token1
function collect(
address recipient,
int24 tickLower,
int24 tickUpper,
uint128 amount0Requested,
uint128 amount1Requested
) external returns (uint128 amount0, uint128 amount1);
/// @notice Burn liquidity from the sender and account tokens owed for the liquidity to the position
/// @dev Can be used to trigger a recalculation of fees owed to a position by calling with an amount of 0
/// @dev Fees must be collected separately via a call to #collect
/// @param tickLower The lower tick of the position for which to burn liquidity
/// @param tickUpper The upper tick of the position for which to burn liquidity
/// @param amount How much liquidity to burn
/// @return amount0 The amount of token0 sent to the recipient
/// @return amount1 The amount of token1 sent to the recipient
function burn(
int24 tickLower,
int24 tickUpper,
uint128 amount
) external returns (uint256 amount0, uint256 amount1);
/// @notice Swap token0 for token1, or token1 for token0
/// @dev The caller of this method receives a callback in the form of IUniswapV3SwapCallback#uniswapV3SwapCallback
/// @param recipient The address to receive the output of the swap
/// @param zeroForOne The direction of the swap, true for token0 to token1, false for token1 to token0
/// @param amountSpecified The amount of the swap, which implicitly configures the swap as exact input (positive), or exact output (negative)
/// @param sqrtPriceLimitX96 The Q64.96 sqrt price limit. If zero for one, the price cannot be less than this
/// value after the swap. If one for zero, the price cannot be greater than this value after the swap
/// @param data Any data to be passed through to the callback
/// @return amount0 The delta of the balance of token0 of the pool, exact when negative, minimum when positive
/// @return amount1 The delta of the balance of token1 of the pool, exact when negative, minimum when positive
function swap(
address recipient,
bool zeroForOne,
int256 amountSpecified,
uint160 sqrtPriceLimitX96,
bytes calldata data
) external returns (int256 amount0, int256 amount1);
/// @notice Receive token0 and/or token1 and pay it back, plus a fee, in the callback
/// @dev The caller of this method receives a callback in the form of IUniswapV3FlashCallback#uniswapV3FlashCallback
/// @dev Can be used to donate underlying tokens pro-rata to currently in-range liquidity providers by calling
/// with 0 amount{0,1} and sending the donation amount(s) from the callback
/// @param recipient The address which will receive the token0 and token1 amounts
/// @param amount0 The amount of token0 to send
/// @param amount1 The amount of token1 to send
/// @param data Any data to be passed through to the callback
function flash(
address recipient,
uint256 amount0,
uint256 amount1,
bytes calldata data
) external;
/// @notice Increase the maximum number of price and liquidity observations that this pool will store
/// @dev This method is no-op if the pool already has an observationCardinalityNext greater than or equal to
/// the input observationCardinalityNext.
/// @param observationCardinalityNext The desired minimum number of observations for the pool to store
function increaseObservationCardinalityNext(uint16 observationCardinalityNext) external;
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Permissioned pool actions
/// @notice Contains pool methods that may only be called by the factory owner
interface IUniswapV3PoolOwnerActions {
/// @notice Set the denominator of the protocol's % share of the fees
/// @param feeProtocol0 new protocol fee for token0 of the pool
/// @param feeProtocol1 new protocol fee for token1 of the pool
function setFeeProtocol(uint8 feeProtocol0, uint8 feeProtocol1) external;
/// @notice Collect the protocol fee accrued to the pool
/// @param recipient The address to which collected protocol fees should be sent
/// @param amount0Requested The maximum amount of token0 to send, can be 0 to collect fees in only token1
/// @param amount1Requested The maximum amount of token1 to send, can be 0 to collect fees in only token0
/// @return amount0 The protocol fee collected in token0
/// @return amount1 The protocol fee collected in token1
function collectProtocol(
address recipient,
uint128 amount0Requested,
uint128 amount1Requested
) external returns (uint128 amount0, uint128 amount1);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Events emitted by a pool
/// @notice Contains all events emitted by the pool
interface IUniswapV3PoolEvents {
/// @notice Emitted exactly once by a pool when #initialize is first called on the pool
/// @dev Mint/Burn/Swap cannot be emitted by the pool before Initialize
/// @param sqrtPriceX96 The initial sqrt price of the pool, as a Q64.96
/// @param tick The initial tick of the pool, i.e. log base 1.0001 of the starting price of the pool
event Initialize(uint160 sqrtPriceX96, int24 tick);
/// @notice Emitted when liquidity is minted for a given position
/// @param sender The address that minted the liquidity
/// @param owner The owner of the position and recipient of any minted liquidity
/// @param tickLower The lower tick of the position
/// @param tickUpper The upper tick of the position
/// @param amount The amount of liquidity minted to the position range
/// @param amount0 How much token0 was required for the minted liquidity
/// @param amount1 How much token1 was required for the minted liquidity
event Mint(
address sender,
address indexed owner,
int24 indexed tickLower,
int24 indexed tickUpper,
uint128 amount,
uint256 amount0,
uint256 amount1
);
/// @notice Emitted when fees are collected by the owner of a position
/// @dev Collect events may be emitted with zero amount0 and amount1 when the caller chooses not to collect fees
/// @param owner The owner of the position for which fees are collected
/// @param tickLower The lower tick of the position
/// @param tickUpper The upper tick of the position
/// @param amount0 The amount of token0 fees collected
/// @param amount1 The amount of token1 fees collected
event Collect(
address indexed owner,
address recipient,
int24 indexed tickLower,
int24 indexed tickUpper,
uint128 amount0,
uint128 amount1
);
/// @notice Emitted when a position's liquidity is removed
/// @dev Does not withdraw any fees earned by the liquidity position, which must be withdrawn via #collect
/// @param owner The owner of the position for which liquidity is removed
/// @param tickLower The lower tick of the position
/// @param tickUpper The upper tick of the position
/// @param amount The amount of liquidity to remove
/// @param amount0 The amount of token0 withdrawn
/// @param amount1 The amount of token1 withdrawn
event Burn(
address indexed owner,
int24 indexed tickLower,
int24 indexed tickUpper,
uint128 amount,
uint256 amount0,
uint256 amount1
);
/// @notice Emitted by the pool for any swaps between token0 and token1
/// @param sender The address that initiated the swap call, and that received the callback
/// @param recipient The address that received the output of the swap
/// @param amount0 The delta of the token0 balance of the pool
/// @param amount1 The delta of the token1 balance of the pool
/// @param sqrtPriceX96 The sqrt(price) of the pool after the swap, as a Q64.96
/// @param tick The log base 1.0001 of price of the pool after the swap
event Swap(
address indexed sender,
address indexed recipient,
int256 amount0,
int256 amount1,
uint160 sqrtPriceX96,
int24 tick
);
/// @notice Emitted by the pool for any flashes of token0/token1
/// @param sender The address that initiated the swap call, and that received the callback
/// @param recipient The address that received the tokens from flash
/// @param amount0 The amount of token0 that was flashed
/// @param amount1 The amount of token1 that was flashed
/// @param paid0 The amount of token0 paid for the flash, which can exceed the amount0 plus the fee
/// @param paid1 The amount of token1 paid for the flash, which can exceed the amount1 plus the fee
event Flash(
address indexed sender,
address indexed recipient,
uint256 amount0,
uint256 amount1,
uint256 paid0,
uint256 paid1
);
/// @notice Emitted by the pool for increases to the number of observations that can be stored
/// @dev observationCardinalityNext is not the observation cardinality until an observation is written at the index
/// just before a mint/swap/burn.
/// @param observationCardinalityNextOld The previous value of the next observation cardinality
/// @param observationCardinalityNextNew The updated value of the next observation cardinality
event IncreaseObservationCardinalityNext(
uint16 observationCardinalityNextOld,
uint16 observationCardinalityNextNew
);
/// @notice Emitted when the protocol fee is changed by the pool
/// @param feeProtocol0Old The previous value of the token0 protocol fee
/// @param feeProtocol1Old The previous value of the token1 protocol fee
/// @param feeProtocol0New The updated value of the token0 protocol fee
/// @param feeProtocol1New The updated value of the token1 protocol fee
event SetFeeProtocol(uint8 feeProtocol0Old, uint8 feeProtocol1Old, uint8 feeProtocol0New, uint8 feeProtocol1New);
/// @notice Emitted when the collected protocol fees are withdrawn by the factory owner
/// @param sender The address that collects the protocol fees
/// @param recipient The address that receives the collected protocol fees
/// @param amount0 The amount of token0 protocol fees that is withdrawn
/// @param amount0 The amount of token1 protocol fees that is withdrawn
event CollectProtocol(address indexed sender, address indexed recipient, uint128 amount0, uint128 amount1);
}
| * Mint function which initializes the pool position Must be called before any liquidity can be deposited/ | function mintInitial(uint256 amount0, uint256 amount1)
external
onlyOwnerOrManager
{
require(tokenId == 0);
require(amount0 > 0 || amount1 > 0);
checkTwap();
if (amount0 > 0) {
token0.safeTransferFrom(msg.sender, address(this), amount0);
}
if (amount1 > 0) {
token1.safeTransferFrom(msg.sender, address(this), amount1);
}
tokenId = createPosition(amount0, amount1);
amount0 = getToken0AmountInWei(amount0);
amount1 = getToken1AmountInWei(amount1);
_mintInternal(getAmountInAsset1Terms(amount0).add(amount1));
}
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/*
Copyright 2017 ZeroEx Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity ^0.4.8;
import "./base/Ownable.sol";
/// @title Token Registry - Stores metadata associated with ERC20 tokens. See ERC22 https://github.com/ethereum/EIPs/issues/22
/// @author Amir Bandeali - <[email protected]>, Will Warren - <[email protected]>
contract TokenRegistry is Ownable {
event LogAddToken(
address token,
string name,
string symbol,
string url,
uint8 decimals,
bytes32 ipfsHash,
bytes32 swarmHash
);
event LogRemoveToken(
address token,
string name,
string symbol,
string url,
uint8 decimals,
bytes32 ipfsHash,
bytes32 swarmHash
);
event LogTokenNameChange(address token, string oldName, string newName);
event LogTokenSymbolChange(address token, string oldSymbol, string newSymbol);
event LogTokenUrlChange(address token, string oldUrl, string newUrl);
event LogTokenIpfsHashChange(address token, bytes32 oldIpfsHash, bytes32 newIpfsHash);
event LogTokenSwarmHashChange(address token, bytes32 oldSwarmHash, bytes32 newSwarmHash);
mapping (address => TokenMetadata) public tokens;
mapping (string => address) tokenBySymbol;
mapping (string => address) tokenByName;
address[] public tokenAddresses;
struct TokenMetadata {
address token;
string name;
string symbol;
string url;
uint8 decimals;
bytes32 ipfsHash;
bytes32 swarmHash;
}
modifier tokenExists(address _token) {
if (tokens[_token].token != address(0)) {
_;
}
}
modifier tokenDoesNotExist(address _token) {
if (tokens[_token].token == address(0)) {
_;
}
}
/// @dev Allows owner to add a new token to the registry.
/// @param _token Address of new token.
/// @param _name Name of new token.
/// @param _symbol Symbol for new token.
/// @param _url Token's project URL.
/// @param _decimals Number of decimals, divisibility of new token.
/// @param _ipfsHash IPFS hash of token icon.
/// @param _swarmHash Swarm hash of token icon.
function addToken(
address _token,
string _name,
string _symbol,
string _url,
uint8 _decimals,
bytes32 _ipfsHash,
bytes32 _swarmHash)
public
onlyOwner
tokenDoesNotExist(_token)
{
tokens[_token] = TokenMetadata({
token: _token,
name: _name,
symbol: _symbol,
url: _url,
decimals: _decimals,
ipfsHash: _ipfsHash,
swarmHash: _swarmHash
});
tokenAddresses.push(_token);
tokenBySymbol[_symbol] = _token;
tokenByName[_name] = _token;
LogAddToken(
_token,
_name,
_symbol,
_url,
_decimals,
_ipfsHash,
_swarmHash
);
}
/// @dev Allows owner to remove an existing token from the registry.
/// @param _token Address of existing token.
function removeToken(address _token)
public
onlyOwner
tokenExists(_token)
{
for (uint i = 0; i < tokenAddresses.length; i++) {
if (tokenAddresses[i] == _token) {
tokenAddresses[i] = tokenAddresses[tokenAddresses.length - 1];
tokenAddresses.length -= 1;
break;
}
}
TokenMetadata token = tokens[_token];
LogRemoveToken(
token.token,
token.name,
token.symbol,
token.url,
token.decimals,
token.ipfsHash,
token.swarmHash
);
delete tokenBySymbol[token.symbol];
delete tokenByName[token.name];
delete tokens[_token];
}
/// @dev Allows owner to modify an existing token's name.
/// @param _token Address of existing token.
/// @param _name New name.
function setTokenName(address _token, string _name)
public
onlyOwner
tokenExists(_token)
{
TokenMetadata token = tokens[_token];
LogTokenNameChange(_token, token.name, _name);
delete tokenByName[token.name];
tokenByName[_name] = _token;
token.name = _name;
}
/// @dev Allows owner to modify an existing token's symbol.
/// @param _token Address of existing token.
/// @param _symbol New symbol.
function setTokenSymbol(address _token, string _symbol)
public
onlyOwner
tokenExists(_token)
{
TokenMetadata token = tokens[_token];
LogTokenSymbolChange(_token, token.symbol, _symbol);
delete tokenBySymbol[token.symbol];
tokenBySymbol[_symbol] = _token;
token.symbol = _symbol;
}
/// @dev Allows owner to modify an existing token's IPFS hash.
/// @param _token Address of existing token.
/// @param _ipfsHash New IPFS hash.
function setTokenIpfsHash(address _token, bytes32 _ipfsHash)
public
onlyOwner
tokenExists(_token)
{
TokenMetadata token = tokens[_token];
LogTokenIpfsHashChange(_token, token.ipfsHash, _ipfsHash);
token.ipfsHash = _ipfsHash;
}
/// @dev Allows owner to modify an existing token's Swarm hash.
/// @param _token Address of existing token.
/// @param _swarmHash New Swarm hash.
function setTokenSwarmHash(address _token, bytes32 _swarmHash)
public
onlyOwner
tokenExists(_token)
{
TokenMetadata token = tokens[_token];
LogTokenSwarmHashChange(_token, token.swarmHash, _swarmHash);
token.swarmHash = _swarmHash;
}
/// @dev Allows owner to modify an existing token's URL.
/// @param _token Address of existing token.
/// @param _url New URL.
function setTokenUrl(address _token, string _url)
public
onlyOwner
tokenExists(_token)
{
TokenMetadata token = tokens[_token];
LogTokenUrlChange(_token, token.url, _url);
token.url = _url;
}
/*
* Web3 call functions
*/
/// @dev Provides a registered token's address when given the token symbol.
/// @param _symbol Symbol of registered token.
/// @return Token's address.
function getTokenAddressBySymbol(string _symbol) constant returns (address tokenAddress) {
return tokenBySymbol[_symbol];
}
/// @dev Provides a registered token's address when given the token name.
/// @param _name Name of registered token.
/// @return Token's address.
function getTokenAddressByName(string _name) constant returns (address tokenAddress) {
return tokenByName[_name];
}
/// @dev Provides a registered token's metadata, looked up by address.
/// @param _token Address of registered token.
/// @return Token metadata.
function getTokenMetaData(address _token)
constant
returns (
address tokenAddress,
string name,
string symbol,
string url,
uint8 decimals,
bytes32 ipfsHash,
bytes32 swarmHash
)
{
TokenMetadata memory token = tokens[_token];
return (
token.token,
token.name,
token.symbol,
token.url,
token.decimals,
token.ipfsHash,
token.swarmHash
);
}
/// @dev Provides a registered token's metadata, looked up by name.
/// @param _name Name of registered token.
/// @return Token metadata.
function getTokenByName(string _name)
constant
returns (
address tokenAddress,
string name,
string symbol,
string url,
uint8 decimals,
bytes32 ipfsHash,
bytes32 swarmHash
)
{
address _token = tokenByName[_name];
return getTokenMetaData(_token);
}
/// @dev Provides a registered token's metadata, looked up by symbol.
/// @param _symbol Symbol of registered token.
/// @return Token metadata.
function getTokenBySymbol(string _symbol)
constant
returns (
address tokenAddress,
string name,
string symbol,
string url,
uint8 decimals,
bytes32 ipfsHash,
bytes32 swarmHash
)
{
address _token = tokenBySymbol[_symbol];
return getTokenMetaData(_token);
}
/// @dev Returns an array containing all token addresses.
/// @return Array of token addresses.
function getTokenAddresses() constant returns (address[]) {
return tokenAddresses;
}
}
| @title Token Registry - Stores metadata associated with ERC20 tokens. See ERC22 https://github.com/ethereum/EIPs/issues/22 @author Amir Bandeali - <[email protected]>, Will Warren - <[email protected]> | contract TokenRegistry is Ownable {
event LogAddToken(
address token,
string name,
string symbol,
string url,
uint8 decimals,
bytes32 ipfsHash,
bytes32 swarmHash
);
event LogRemoveToken(
address token,
string name,
string symbol,
string url,
uint8 decimals,
bytes32 ipfsHash,
bytes32 swarmHash
);
event LogTokenNameChange(address token, string oldName, string newName);
event LogTokenSymbolChange(address token, string oldSymbol, string newSymbol);
event LogTokenUrlChange(address token, string oldUrl, string newUrl);
event LogTokenIpfsHashChange(address token, bytes32 oldIpfsHash, bytes32 newIpfsHash);
event LogTokenSwarmHashChange(address token, bytes32 oldSwarmHash, bytes32 newSwarmHash);
mapping (address => TokenMetadata) public tokens;
mapping (string => address) tokenBySymbol;
mapping (string => address) tokenByName;
address[] public tokenAddresses;
pragma solidity ^0.4.8;
struct TokenMetadata {
address token;
string name;
string symbol;
string url;
uint8 decimals;
bytes32 ipfsHash;
bytes32 swarmHash;
}
modifier tokenExists(address _token) {
if (tokens[_token].token != address(0)) {
_;
}
}
modifier tokenExists(address _token) {
if (tokens[_token].token != address(0)) {
_;
}
}
modifier tokenDoesNotExist(address _token) {
if (tokens[_token].token == address(0)) {
_;
}
}
modifier tokenDoesNotExist(address _token) {
if (tokens[_token].token == address(0)) {
_;
}
}
function addToken(
address _token,
string _name,
string _symbol,
string _url,
uint8 _decimals,
bytes32 _ipfsHash,
bytes32 _swarmHash)
public
onlyOwner
tokenDoesNotExist(_token)
{
tokens[_token] = TokenMetadata({
token: _token,
name: _name,
symbol: _symbol,
url: _url,
decimals: _decimals,
ipfsHash: _ipfsHash,
swarmHash: _swarmHash
});
tokenAddresses.push(_token);
tokenBySymbol[_symbol] = _token;
tokenByName[_name] = _token;
LogAddToken(
_token,
_name,
_symbol,
_url,
_decimals,
_ipfsHash,
_swarmHash
);
}
function addToken(
address _token,
string _name,
string _symbol,
string _url,
uint8 _decimals,
bytes32 _ipfsHash,
bytes32 _swarmHash)
public
onlyOwner
tokenDoesNotExist(_token)
{
tokens[_token] = TokenMetadata({
token: _token,
name: _name,
symbol: _symbol,
url: _url,
decimals: _decimals,
ipfsHash: _ipfsHash,
swarmHash: _swarmHash
});
tokenAddresses.push(_token);
tokenBySymbol[_symbol] = _token;
tokenByName[_name] = _token;
LogAddToken(
_token,
_name,
_symbol,
_url,
_decimals,
_ipfsHash,
_swarmHash
);
}
function removeToken(address _token)
public
onlyOwner
tokenExists(_token)
{
for (uint i = 0; i < tokenAddresses.length; i++) {
if (tokenAddresses[i] == _token) {
tokenAddresses[i] = tokenAddresses[tokenAddresses.length - 1];
tokenAddresses.length -= 1;
break;
}
}
TokenMetadata token = tokens[_token];
LogRemoveToken(
token.token,
token.name,
token.symbol,
token.url,
token.decimals,
token.ipfsHash,
token.swarmHash
);
delete tokenBySymbol[token.symbol];
delete tokenByName[token.name];
delete tokens[_token];
}
function removeToken(address _token)
public
onlyOwner
tokenExists(_token)
{
for (uint i = 0; i < tokenAddresses.length; i++) {
if (tokenAddresses[i] == _token) {
tokenAddresses[i] = tokenAddresses[tokenAddresses.length - 1];
tokenAddresses.length -= 1;
break;
}
}
TokenMetadata token = tokens[_token];
LogRemoveToken(
token.token,
token.name,
token.symbol,
token.url,
token.decimals,
token.ipfsHash,
token.swarmHash
);
delete tokenBySymbol[token.symbol];
delete tokenByName[token.name];
delete tokens[_token];
}
function removeToken(address _token)
public
onlyOwner
tokenExists(_token)
{
for (uint i = 0; i < tokenAddresses.length; i++) {
if (tokenAddresses[i] == _token) {
tokenAddresses[i] = tokenAddresses[tokenAddresses.length - 1];
tokenAddresses.length -= 1;
break;
}
}
TokenMetadata token = tokens[_token];
LogRemoveToken(
token.token,
token.name,
token.symbol,
token.url,
token.decimals,
token.ipfsHash,
token.swarmHash
);
delete tokenBySymbol[token.symbol];
delete tokenByName[token.name];
delete tokens[_token];
}
function setTokenName(address _token, string _name)
public
onlyOwner
tokenExists(_token)
{
TokenMetadata token = tokens[_token];
LogTokenNameChange(_token, token.name, _name);
delete tokenByName[token.name];
tokenByName[_name] = _token;
token.name = _name;
}
function setTokenSymbol(address _token, string _symbol)
public
onlyOwner
tokenExists(_token)
{
TokenMetadata token = tokens[_token];
LogTokenSymbolChange(_token, token.symbol, _symbol);
delete tokenBySymbol[token.symbol];
tokenBySymbol[_symbol] = _token;
token.symbol = _symbol;
}
function setTokenIpfsHash(address _token, bytes32 _ipfsHash)
public
onlyOwner
tokenExists(_token)
{
TokenMetadata token = tokens[_token];
LogTokenIpfsHashChange(_token, token.ipfsHash, _ipfsHash);
token.ipfsHash = _ipfsHash;
}
function setTokenSwarmHash(address _token, bytes32 _swarmHash)
public
onlyOwner
tokenExists(_token)
{
TokenMetadata token = tokens[_token];
LogTokenSwarmHashChange(_token, token.swarmHash, _swarmHash);
token.swarmHash = _swarmHash;
}
function setTokenUrl(address _token, string _url)
public
onlyOwner
tokenExists(_token)
{
TokenMetadata token = tokens[_token];
LogTokenUrlChange(_token, token.url, _url);
token.url = _url;
}
function getTokenAddressBySymbol(string _symbol) constant returns (address tokenAddress) {
return tokenBySymbol[_symbol];
}
function getTokenAddressByName(string _name) constant returns (address tokenAddress) {
return tokenByName[_name];
}
function getTokenMetaData(address _token)
constant
returns (
address tokenAddress,
string name,
string symbol,
string url,
uint8 decimals,
bytes32 ipfsHash,
bytes32 swarmHash
)
{
TokenMetadata memory token = tokens[_token];
return (
token.token,
token.name,
token.symbol,
token.url,
token.decimals,
token.ipfsHash,
token.swarmHash
);
}
function getTokenByName(string _name)
constant
returns (
address tokenAddress,
string name,
string symbol,
string url,
uint8 decimals,
bytes32 ipfsHash,
bytes32 swarmHash
)
{
address _token = tokenByName[_name];
return getTokenMetaData(_token);
}
function getTokenBySymbol(string _symbol)
constant
returns (
address tokenAddress,
string name,
string symbol,
string url,
uint8 decimals,
bytes32 ipfsHash,
bytes32 swarmHash
)
{
address _token = tokenBySymbol[_symbol];
return getTokenMetaData(_token);
}
function getTokenAddresses() constant returns (address[]) {
return tokenAddresses;
}
}
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./partial_match/1/0x73dF03B5436C84Cf9d5A758fb756928DCEAf19d7/sources/ExchangeIssuanceModule.sol | * Calculates required tokens to receive, executes orders, and checks post-exchange receive balances. @param _exchangeIssuanceParams A Struct containing exchange issuance metadata @param _orderData Bytes array containing the exchange orders to execute/ Calculate expected receive token balances after exchange orders executed Execute exchange orders Check that sender's receive tokens in Vault have been incremented correctly | function executeOrders(
ExchangeIssuanceLibrary.ExchangeIssuanceParams memory _exchangeIssuanceParams,
bytes memory _orderData
)
private
{
uint256[] memory requiredBalances = calculateReceiveTokenBalances(
_exchangeIssuanceParams
);
executeExchangeOrders(_orderData);
ExchangeIssuanceLibrary.validatePostExchangeReceiveTokenBalances(
vault,
_exchangeIssuanceParams.receiveTokens,
requiredBalances,
msg.sender
);
}
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// File: contracts/interfaces/IDelegable.sol
pragma solidity ^0.6.10;
interface IDelegable {
function ADDDELEGATE653(address) external; //inject NONSTANDARD NAMING
function ADDDELEGATEBYSIGNATURE882(address, address, uint, uint8, bytes32, bytes32) external; //inject NONSTANDARD NAMING
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.6.0;
interface IERC20 {
function TOTALSUPPLY521() external view returns (uint256); //inject NONSTANDARD NAMING
function BALANCEOF833(address account) external view returns (uint256); //inject NONSTANDARD NAMING
function TRANSFER582(address recipient, uint256 amount) external returns (bool); //inject NONSTANDARD NAMING
function ALLOWANCE506(address owner, address spender) external view returns (uint256); //inject NONSTANDARD NAMING
function APPROVE147(address spender, uint256 amount) external returns (bool); //inject NONSTANDARD NAMING
function TRANSFERFROM451(address sender, address recipient, uint256 amount) external returns (bool); //inject NONSTANDARD NAMING
event TRANSFER75(address indexed from, address indexed to, uint256 value); //inject NONSTANDARD NAMING
event APPROVAL533(address indexed owner, address indexed spender, uint256 value); //inject NONSTANDARD NAMING
}
// File: contracts/interfaces/IVat.sol
pragma solidity ^0.6.10;
interface IVat {
// function can(address, address) external view returns (uint);
function HOPE952(address) external; //inject NONSTANDARD NAMING
function NOPE303(address) external; //inject NONSTANDARD NAMING
function LIVE610() external view returns (uint); //inject NONSTANDARD NAMING
function ILKS57(bytes32) external view returns (uint, uint, uint, uint, uint); //inject NONSTANDARD NAMING
function URNS490(bytes32, address) external view returns (uint, uint); //inject NONSTANDARD NAMING
function GEM988(bytes32, address) external view returns (uint); //inject NONSTANDARD NAMING
// function dai(address) external view returns (uint);
function FROB42(bytes32, address, address, address, int, int) external; //inject NONSTANDARD NAMING
function FORK314(bytes32, address, address, int, int) external; //inject NONSTANDARD NAMING
function MOVE289(address, address, uint) external; //inject NONSTANDARD NAMING
function FLUX433(bytes32, address, address, uint) external; //inject NONSTANDARD NAMING
}
// File: contracts/interfaces/IWeth.sol
pragma solidity ^0.6.10;
interface IWeth {
function DEPOSIT338() external payable; //inject NONSTANDARD NAMING
function WITHDRAW817(uint) external; //inject NONSTANDARD NAMING
function APPROVE147(address, uint) external returns (bool) ; //inject NONSTANDARD NAMING
function TRANSFER582(address, uint) external returns (bool); //inject NONSTANDARD NAMING
function TRANSFERFROM451(address, address, uint) external returns (bool); //inject NONSTANDARD NAMING
}
// File: contracts/interfaces/IGemJoin.sol
pragma solidity ^0.6.10;
interface IGemJoin {
function RELY66(address usr) external; //inject NONSTANDARD NAMING
function DENY577(address usr) external; //inject NONSTANDARD NAMING
function CAGE307() external; //inject NONSTANDARD NAMING
function JOIN369(address usr, uint WAD) external; //inject NONSTANDARD NAMING
function EXIT932(address usr, uint WAD) external; //inject NONSTANDARD NAMING
}
// File: contracts/interfaces/IDaiJoin.sol
pragma solidity ^0.6.10;
interface IDaiJoin {
function RELY66(address usr) external; //inject NONSTANDARD NAMING
function DENY577(address usr) external; //inject NONSTANDARD NAMING
function CAGE307() external; //inject NONSTANDARD NAMING
function JOIN369(address usr, uint WAD) external; //inject NONSTANDARD NAMING
function EXIT932(address usr, uint WAD) external; //inject NONSTANDARD NAMING
}
// File: contracts/interfaces/IPot.sol
pragma solidity ^0.6.10;
interface IPot {
function CHI612() external view returns (uint256); //inject NONSTANDARD NAMING
function PIE445(address) external view returns (uint256); // Not a function, but a public variable. //inject NONSTANDARD NAMING
function RHO514() external returns (uint256); //inject NONSTANDARD NAMING
function DRIP65() external returns (uint256); //inject NONSTANDARD NAMING
function JOIN369(uint256) external; //inject NONSTANDARD NAMING
function EXIT932(uint256) external; //inject NONSTANDARD NAMING
}
// File: contracts/interfaces/IChai.sol
pragma solidity ^0.6.10;
interface IChai {
function BALANCEOF833(address account) external view returns (uint256); //inject NONSTANDARD NAMING
function TRANSFER582(address dst, uint wad) external returns (bool); //inject NONSTANDARD NAMING
function MOVE289(address src, address dst, uint wad) external returns (bool); //inject NONSTANDARD NAMING
function TRANSFERFROM451(address src, address dst, uint wad) external returns (bool); //inject NONSTANDARD NAMING
function APPROVE147(address usr, uint wad) external returns (bool); //inject NONSTANDARD NAMING
function DAI858(address usr) external returns (uint wad); //inject NONSTANDARD NAMING
function JOIN369(address dst, uint wad) external; //inject NONSTANDARD NAMING
function EXIT932(address src, uint wad) external; //inject NONSTANDARD NAMING
function DRAW289(address src, uint wad) external; //inject NONSTANDARD NAMING
function PERMIT233(address holder, address spender, uint256 nonce, uint256 expiry, bool allowed, uint8 v, bytes32 r, bytes32 s) external; //inject NONSTANDARD NAMING
function NONCES538(address account) external view returns (uint256); //inject NONSTANDARD NAMING
}
// File: contracts/interfaces/ITreasury.sol
pragma solidity ^0.6.10;
interface ITreasury {
function DEBT715() external view returns(uint256); //inject NONSTANDARD NAMING
function SAVINGS903() external view returns(uint256); //inject NONSTANDARD NAMING
function PUSHDAI613(address user, uint256 dai) external; //inject NONSTANDARD NAMING
function PULLDAI166(address user, uint256 dai) external; //inject NONSTANDARD NAMING
function PUSHCHAI91(address user, uint256 chai) external; //inject NONSTANDARD NAMING
function PULLCHAI479(address user, uint256 chai) external; //inject NONSTANDARD NAMING
function PUSHWETH634(address to, uint256 weth) external; //inject NONSTANDARD NAMING
function PULLWETH548(address to, uint256 weth) external; //inject NONSTANDARD NAMING
function SHUTDOWN178() external; //inject NONSTANDARD NAMING
function LIVE610() external view returns(bool); //inject NONSTANDARD NAMING
function VAT519() external view returns (IVat); //inject NONSTANDARD NAMING
function WETH278() external view returns (IWeth); //inject NONSTANDARD NAMING
function DAI858() external view returns (IERC20); //inject NONSTANDARD NAMING
function DAIJOIN173() external view returns (IDaiJoin); //inject NONSTANDARD NAMING
function WETHJOIN654() external view returns (IGemJoin); //inject NONSTANDARD NAMING
function POT408() external view returns (IPot); //inject NONSTANDARD NAMING
function CHAI326() external view returns (IChai); //inject NONSTANDARD NAMING
}
// File: contracts/interfaces/IERC2612.sol
// Code adapted from https://github.com/OpenZeppelin/openzeppelin-contracts/pull/2237/
pragma solidity ^0.6.0;
interface IERC2612 {
function PERMIT233(address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external; //inject NONSTANDARD NAMING
function NONCES538(address owner) external view returns (uint256); //inject NONSTANDARD NAMING
}
// File: contracts/interfaces/IFYDai.sol
pragma solidity ^0.6.10;
interface IFYDai is IERC20, IERC2612 {
function ISMATURE431() external view returns(bool); //inject NONSTANDARD NAMING
function MATURITY388() external view returns(uint); //inject NONSTANDARD NAMING
function CHI0242() external view returns(uint); //inject NONSTANDARD NAMING
function RATE0398() external view returns(uint); //inject NONSTANDARD NAMING
function CHIGROWTH747() external view returns(uint); //inject NONSTANDARD NAMING
function RATEGROWTH408() external view returns(uint); //inject NONSTANDARD NAMING
function MATURE589() external; //inject NONSTANDARD NAMING
function UNLOCKED182() external view returns (uint); //inject NONSTANDARD NAMING
function MINT176(address, uint) external; //inject NONSTANDARD NAMING
function BURN250(address, uint) external; //inject NONSTANDARD NAMING
function FLASHMINT22(uint, bytes calldata) external; //inject NONSTANDARD NAMING
function REDEEM906(address, address, uint256) external returns (uint256); //inject NONSTANDARD NAMING
// function transfer(address, uint) external returns (bool);
// function transferFrom(address, address, uint) external returns (bool);
// function approve(address, uint) external returns (bool);
}
// File: contracts/interfaces/IController.sol
pragma solidity ^0.6.10;
interface IController is IDelegable {
function TREASURY445() external view returns (ITreasury); //inject NONSTANDARD NAMING
function SERIES14(uint256) external view returns (IFYDai); //inject NONSTANDARD NAMING
function SERIESITERATOR268(uint256) external view returns (uint256); //inject NONSTANDARD NAMING
function TOTALSERIES702() external view returns (uint256); //inject NONSTANDARD NAMING
function CONTAINSSERIES982(uint256) external view returns (bool); //inject NONSTANDARD NAMING
function POSTED950(bytes32, address) external view returns (uint256); //inject NONSTANDARD NAMING
function DEBTFYDAI447(bytes32, uint256, address) external view returns (uint256); //inject NONSTANDARD NAMING
function DEBTDAI877(bytes32, uint256, address) external view returns (uint256); //inject NONSTANDARD NAMING
function TOTALDEBTDAI51(bytes32, address) external view returns (uint256); //inject NONSTANDARD NAMING
function ISCOLLATERALIZED839(bytes32, address) external view returns (bool); //inject NONSTANDARD NAMING
function INDAI269(bytes32, uint256, uint256) external view returns (uint256); //inject NONSTANDARD NAMING
function INFYDAI474(bytes32, uint256, uint256) external view returns (uint256); //inject NONSTANDARD NAMING
function ERASE227(bytes32, address) external returns (uint256, uint256); //inject NONSTANDARD NAMING
function SHUTDOWN178() external; //inject NONSTANDARD NAMING
function POST95(bytes32, address, address, uint256) external; //inject NONSTANDARD NAMING
function WITHDRAW817(bytes32, address, address, uint256) external; //inject NONSTANDARD NAMING
function BORROW691(bytes32, uint256, address, address, uint256) external; //inject NONSTANDARD NAMING
function REPAYFYDAI426(bytes32, uint256, address, address, uint256) external returns (uint256); //inject NONSTANDARD NAMING
function REPAYDAI460(bytes32, uint256, address, address, uint256) external returns (uint256); //inject NONSTANDARD NAMING
}
// File: contracts/interfaces/IDai.sol
pragma solidity ^0.6.10;
interface IDai is IERC20 {
function NONCES538(address user) external view returns (uint256); //inject NONSTANDARD NAMING
function PERMIT233(address holder, address spender, uint256 nonce, uint256 expiry, //inject NONSTANDARD NAMING
bool allowed, uint8 v, bytes32 r, bytes32 s) external;
}
// File: contracts/interfaces/IPool.sol
pragma solidity ^0.6.10;
interface IPool is IDelegable, IERC20, IERC2612 {
function DAI858() external view returns(IERC20); //inject NONSTANDARD NAMING
function FYDAI600() external view returns(IFYDai); //inject NONSTANDARD NAMING
function GETDAIRESERVES173() external view returns(uint128); //inject NONSTANDARD NAMING
function GETFYDAIRESERVES833() external view returns(uint128); //inject NONSTANDARD NAMING
function SELLDAI400(address from, address to, uint128 daiIn) external returns(uint128); //inject NONSTANDARD NAMING
function BUYDAI253(address from, address to, uint128 daiOut) external returns(uint128); //inject NONSTANDARD NAMING
function SELLFYDAI226(address from, address to, uint128 fyDaiIn) external returns(uint128); //inject NONSTANDARD NAMING
function BUYFYDAI675(address from, address to, uint128 fyDaiOut) external returns(uint128); //inject NONSTANDARD NAMING
function SELLDAIPREVIEW300(uint128 daiIn) external view returns(uint128); //inject NONSTANDARD NAMING
function BUYDAIPREVIEW913(uint128 daiOut) external view returns(uint128); //inject NONSTANDARD NAMING
function SELLFYDAIPREVIEW69(uint128 fyDaiIn) external view returns(uint128); //inject NONSTANDARD NAMING
function BUYFYDAIPREVIEW685(uint128 fyDaiOut) external view returns(uint128); //inject NONSTANDARD NAMING
function MINT176(address from, address to, uint256 daiOffered) external returns (uint256); //inject NONSTANDARD NAMING
function BURN250(address from, address to, uint256 tokensBurned) external returns (uint256, uint256); //inject NONSTANDARD NAMING
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.6.0;
library SafeMath {
function ADD958(uint256 a, uint256 b) internal pure returns (uint256) { //inject NONSTANDARD NAMING
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function SUB494(uint256 a, uint256 b) internal pure returns (uint256) { //inject NONSTANDARD NAMING
return SUB494(a, b, "SafeMath: subtraction overflow");
}
function SUB494(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { //inject NONSTANDARD NAMING
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function MUL434(uint256 a, uint256 b) internal pure returns (uint256) { //inject NONSTANDARD NAMING
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function DIV16(uint256 a, uint256 b) internal pure returns (uint256) { //inject NONSTANDARD NAMING
return DIV16(a, b, "SafeMath: division by zero");
}
function DIV16(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { //inject NONSTANDARD NAMING
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function MOD331(uint256 a, uint256 b) internal pure returns (uint256) { //inject NONSTANDARD NAMING
return MOD331(a, b, "SafeMath: modulo by zero");
}
function MOD331(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { //inject NONSTANDARD NAMING
require(b != 0, errorMessage);
return a % b;
}
}
// File: contracts/helpers/DecimalMath.sol
pragma solidity ^0.6.10;
contract DecimalMath {
using SafeMath for uint256;
uint256 constant public unit17 = 1e27; //inject NONSTANDARD NAMING
function MULD379(uint256 x, uint256 y) internal pure returns (uint256) { //inject NONSTANDARD NAMING
return x.MUL434(y).DIV16(unit17);
}
function DIVD836(uint256 x, uint256 y) internal pure returns (uint256) { //inject NONSTANDARD NAMING
return x.MUL434(unit17).DIV16(y);
}
function MULDRUP300(uint256 x, uint256 y) internal pure returns (uint256) //inject NONSTANDARD NAMING
{
uint256 z = x.MUL434(y);
return z.MOD331(unit17) == 0 ? z.DIV16(unit17) : z.DIV16(unit17).ADD958(1);
}
function DIVDRUP370(uint256 x, uint256 y) internal pure returns (uint256) //inject NONSTANDARD NAMING
{
uint256 z = x.MUL434(unit17);
return z.MOD331(y) == 0 ? z.DIV16(y) : z.DIV16(y).ADD958(1);
}
}
// File: contracts/peripheral/YieldProxy.sol
pragma solidity ^0.6.10;
library SafeCast {
function TOUINT128897(uint256 x) internal pure returns(uint128) { //inject NONSTANDARD NAMING
require(
x <= type(uint128).max,
"YieldProxy: Cast overflow"
);
return uint128(x);
}
function TOINT256710(uint256 x) internal pure returns(int256) { //inject NONSTANDARD NAMING
require(
x <= uint256(type(int256).max),
"YieldProxy: Cast overflow"
);
return int256(x);
}
}
contract YieldProxy is DecimalMath {
using SafeCast for uint256;
IVat public vat;
IWeth public weth;
IDai public dai;
IGemJoin public wethJoin;
IDaiJoin public daiJoin;
IChai public chai;
IController public controller;
ITreasury public treasury;
IPool[] public pools;
mapping (address => bool) public poolsMap;
bytes32 public constant chai69 = "CHAI"; //inject NONSTANDARD NAMING
bytes32 public constant weth148 = "ETH-A"; //inject NONSTANDARD NAMING
bool constant public mty307 = true; //inject NONSTANDARD NAMING
bool constant public ytm282 = false; //inject NONSTANDARD NAMING
constructor(address controller_, IPool[] memory _pools) public {
controller = IController(controller_);
treasury = controller.TREASURY445();
weth = treasury.WETH278();
dai = IDai(address(treasury.DAI858()));
chai = treasury.CHAI326();
daiJoin = treasury.DAIJOIN173();
wethJoin = treasury.WETHJOIN654();
vat = treasury.VAT519();
// for repaying debt
dai.APPROVE147(address(treasury), uint(-1));
// for posting to the controller
chai.APPROVE147(address(treasury), uint(-1));
weth.APPROVE147(address(treasury), uint(-1));
// for converting DAI to CHAI
dai.APPROVE147(address(chai), uint(-1));
vat.HOPE952(address(daiJoin));
vat.HOPE952(address(wethJoin));
dai.APPROVE147(address(daiJoin), uint(-1));
weth.APPROVE147(address(wethJoin), uint(-1));
weth.APPROVE147(address(treasury), uint(-1));
// allow all the pools to pull FYDai/dai from us for LPing
for (uint i = 0 ; i < _pools.length; i++) {
dai.APPROVE147(address(_pools[i]), uint(-1));
_pools[i].FYDAI600().APPROVE147(address(_pools[i]), uint(-1));
poolsMap[address(_pools[i])]= true;
}
pools = _pools;
}
function UNPACK384(bytes memory signature) private pure returns (bytes32 r, bytes32 s, uint8 v) { //inject NONSTANDARD NAMING
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
}
function ONBOARD51(address from, bytes memory daiSignature, bytes memory controllerSig) external { //inject NONSTANDARD NAMING
bytes32 r;
bytes32 s;
uint8 v;
(r, s, v) = UNPACK384(daiSignature);
dai.PERMIT233(from, address(this), dai.NONCES538(from), uint(-1), true, v, r, s);
(r, s, v) = UNPACK384(controllerSig);
controller.ADDDELEGATEBYSIGNATURE882(from, address(this), uint(-1), v, r, s);
}
function AUTHORIZEPOOL621(IPool pool, address from, bytes memory daiSig, bytes memory fyDaiSig, bytes memory poolSig) public { //inject NONSTANDARD NAMING
ONLYKNOWNPOOL167(pool);
bytes32 r;
bytes32 s;
uint8 v;
(r, s, v) = UNPACK384(daiSig);
dai.PERMIT233(from, address(pool), dai.NONCES538(from), uint(-1), true, v, r, s);
(r, s, v) = UNPACK384(fyDaiSig);
pool.FYDAI600().PERMIT233(from, address(this), uint(-1), uint(-1), v, r, s);
(r, s, v) = UNPACK384(poolSig);
pool.ADDDELEGATEBYSIGNATURE882(from, address(this), uint(-1), v, r, s);
}
receive() external payable { }
function POST95(address to) //inject NONSTANDARD NAMING
public payable {
weth.DEPOSIT338{ value: msg.value }();
controller.POST95(weth148, address(this), to, msg.value);
}
function WITHDRAW817(address payable to, uint256 amount) //inject NONSTANDARD NAMING
public {
controller.WITHDRAW817(weth148, msg.sender, address(this), amount);
weth.WITHDRAW817(amount);
to.transfer(amount);
}
function ADDLIQUIDITY157(IPool pool, uint256 daiUsed, uint256 maxFYDai) external returns (uint256) { //inject NONSTANDARD NAMING
ONLYKNOWNPOOL167(pool);
IFYDai fyDai = pool.FYDAI600();
require(fyDai.ISMATURE431() != true, "YieldProxy: Only before maturity");
require(dai.TRANSFERFROM451(msg.sender, address(this), daiUsed), "YieldProxy: Transfer Failed");
// calculate needed fyDai
uint256 daiReserves = dai.BALANCEOF833(address(pool));
uint256 fyDaiReserves = fyDai.BALANCEOF833(address(pool));
uint256 daiToAdd = daiUsed.MUL434(daiReserves).DIV16(fyDaiReserves.ADD958(daiReserves));
uint256 daiToConvert = daiUsed.SUB494(daiToAdd);
require(
daiToConvert <= maxFYDai,
"YieldProxy: maxFYDai exceeded"
); // 1 Dai == 1 fyDai
// convert dai to chai and borrow needed fyDai
chai.JOIN369(address(this), daiToConvert);
// look at the balance of chai in dai to avoid rounding issues
uint256 toBorrow = chai.DAI858(address(this));
controller.POST95(chai69, address(this), msg.sender, chai.BALANCEOF833(address(this)));
controller.BORROW691(chai69, fyDai.MATURITY388(), msg.sender, address(this), toBorrow);
// mint liquidity tokens
return pool.MINT176(address(this), msg.sender, daiToAdd);
}
function REMOVELIQUIDITYEARLYDAIPOOL932(IPool pool, uint256 poolTokens, uint256 minimumDaiPrice, uint256 minimumFYDaiPrice) external { //inject NONSTANDARD NAMING
ONLYKNOWNPOOL167(pool);
IFYDai fyDai = pool.FYDAI600();
uint256 maturity = fyDai.MATURITY388();
(uint256 daiObtained, uint256 fyDaiObtained) = pool.BURN250(msg.sender, address(this), poolTokens);
// Exchange Dai for fyDai to pay as much debt as possible
uint256 fyDaiBought = pool.SELLDAI400(address(this), address(this), daiObtained.TOUINT128897());
require(
fyDaiBought >= MULD379(daiObtained, minimumDaiPrice),
"YieldProxy: minimumDaiPrice not reached"
);
fyDaiObtained = fyDaiObtained.ADD958(fyDaiBought);
uint256 fyDaiUsed;
if (fyDaiObtained > 0 && controller.DEBTFYDAI447(chai69, maturity, msg.sender) > 0) {
fyDaiUsed = controller.REPAYFYDAI426(chai69, maturity, address(this), msg.sender, fyDaiObtained);
}
uint256 fyDaiRemaining = fyDaiObtained.SUB494(fyDaiUsed);
if (fyDaiRemaining > 0) {// There is fyDai left, so exchange it for Dai to withdraw only Dai and Chai
require(
pool.SELLFYDAI226(address(this), address(this), uint128(fyDaiRemaining)) >= MULD379(fyDaiRemaining, minimumFYDaiPrice),
"YieldProxy: minimumFYDaiPrice not reached"
);
}
WITHDRAWASSETS926(fyDai);
}
function REMOVELIQUIDITYEARLYDAIFIXED8(IPool pool, uint256 poolTokens, uint256 minimumFYDaiPrice) external { //inject NONSTANDARD NAMING
ONLYKNOWNPOOL167(pool);
IFYDai fyDai = pool.FYDAI600();
uint256 maturity = fyDai.MATURITY388();
(uint256 daiObtained, uint256 fyDaiObtained) = pool.BURN250(msg.sender, address(this), poolTokens);
uint256 fyDaiUsed;
if (fyDaiObtained > 0 && controller.DEBTFYDAI447(chai69, maturity, msg.sender) > 0) {
fyDaiUsed = controller.REPAYFYDAI426(chai69, maturity, address(this), msg.sender, fyDaiObtained);
}
uint256 fyDaiRemaining = fyDaiObtained.SUB494(fyDaiUsed);
if (fyDaiRemaining == 0) { // We used all the fyDai, so probably there is debt left, so pay with Dai
if (daiObtained > 0 && controller.DEBTFYDAI447(chai69, maturity, msg.sender) > 0) {
controller.REPAYDAI460(chai69, maturity, address(this), msg.sender, daiObtained);
}
} else { // Exchange remaining fyDai for Dai to withdraw only Dai and Chai
require(
pool.SELLFYDAI226(address(this), address(this), uint128(fyDaiRemaining)) >= MULD379(fyDaiRemaining, minimumFYDaiPrice),
"YieldProxy: minimumFYDaiPrice not reached"
);
}
WITHDRAWASSETS926(fyDai);
}
function REMOVELIQUIDITYMATURE267(IPool pool, uint256 poolTokens) external { //inject NONSTANDARD NAMING
ONLYKNOWNPOOL167(pool);
IFYDai fyDai = pool.FYDAI600();
uint256 maturity = fyDai.MATURITY388();
(uint256 daiObtained, uint256 fyDaiObtained) = pool.BURN250(msg.sender, address(this), poolTokens);
if (fyDaiObtained > 0) {
daiObtained = daiObtained.ADD958(fyDai.REDEEM906(address(this), address(this), fyDaiObtained));
}
// Repay debt
if (daiObtained > 0 && controller.DEBTFYDAI447(chai69, maturity, msg.sender) > 0) {
controller.REPAYDAI460(chai69, maturity, address(this), msg.sender, daiObtained);
}
WITHDRAWASSETS926(fyDai);
}
function WITHDRAWASSETS926(IFYDai fyDai) internal { //inject NONSTANDARD NAMING
if (controller.DEBTFYDAI447(chai69, fyDai.MATURITY388(), msg.sender) == 0) {
controller.WITHDRAW817(chai69, msg.sender, address(this), controller.POSTED950(chai69, msg.sender));
chai.EXIT932(address(this), chai.BALANCEOF833(address(this)));
}
require(dai.TRANSFER582(msg.sender, dai.BALANCEOF833(address(this))), "YieldProxy: Dai Transfer Failed");
}
function BORROWDAIFORMAXIMUMFYDAI736( //inject NONSTANDARD NAMING
IPool pool,
bytes32 collateral,
uint256 maturity,
address to,
uint256 maximumFYDai,
uint256 daiToBorrow
)
public
returns (uint256)
{
ONLYKNOWNPOOL167(pool);
uint256 fyDaiToBorrow = pool.BUYDAIPREVIEW913(daiToBorrow.TOUINT128897());
require (fyDaiToBorrow <= maximumFYDai, "YieldProxy: Too much fyDai required");
// The collateral for this borrow needs to have been posted beforehand
controller.BORROW691(collateral, maturity, msg.sender, address(this), fyDaiToBorrow);
pool.BUYDAI253(address(this), to, daiToBorrow.TOUINT128897());
return fyDaiToBorrow;
}
function BORROWMINIMUMDAIFORFYDAI776( //inject NONSTANDARD NAMING
IPool pool,
bytes32 collateral,
uint256 maturity,
address to,
uint256 fyDaiToBorrow,
uint256 minimumDaiToBorrow
)
public
returns (uint256)
{
ONLYKNOWNPOOL167(pool);
// The collateral for this borrow needs to have been posted beforehand
controller.BORROW691(collateral, maturity, msg.sender, address(this), fyDaiToBorrow);
uint256 boughtDai = pool.SELLFYDAI226(address(this), to, fyDaiToBorrow.TOUINT128897());
require (boughtDai >= minimumDaiToBorrow, "YieldProxy: Not enough Dai obtained");
return boughtDai;
}
function REPAYFYDAIDEBTFORMAXIMUMDAI955( //inject NONSTANDARD NAMING
IPool pool,
bytes32 collateral,
uint256 maturity,
address to,
uint256 fyDaiRepayment,
uint256 maximumRepaymentInDai
)
public
returns (uint256)
{
ONLYKNOWNPOOL167(pool);
uint256 fyDaiDebt = controller.DEBTFYDAI447(collateral, maturity, to);
uint256 fyDaiToUse = fyDaiDebt < fyDaiRepayment ? fyDaiDebt : fyDaiRepayment; // Use no more fyDai than debt
uint256 repaymentInDai = pool.BUYFYDAI675(msg.sender, address(this), fyDaiToUse.TOUINT128897());
require (repaymentInDai <= maximumRepaymentInDai, "YieldProxy: Too much Dai required");
controller.REPAYFYDAI426(collateral, maturity, address(this), to, fyDaiToUse);
return repaymentInDai;
}
function REPAYMINIMUMFYDAIDEBTFORDAI862( //inject NONSTANDARD NAMING
IPool pool,
bytes32 collateral,
uint256 maturity,
address to,
uint256 minimumFYDaiRepayment,
uint256 repaymentInDai
)
public
returns (uint256)
{
ONLYKNOWNPOOL167(pool);
uint256 fyDaiRepayment = pool.SELLDAIPREVIEW300(repaymentInDai.TOUINT128897());
uint256 fyDaiDebt = controller.DEBTFYDAI447(collateral, maturity, to);
if(fyDaiRepayment <= fyDaiDebt) { // Sell no more Dai than needed to cancel all the debt
pool.SELLDAI400(msg.sender, address(this), repaymentInDai.TOUINT128897());
} else { // If we have too much Dai, then don't sell it all and buy the exact amount of fyDai needed instead.
pool.BUYFYDAI675(msg.sender, address(this), fyDaiDebt.TOUINT128897());
fyDaiRepayment = fyDaiDebt;
}
require (fyDaiRepayment >= minimumFYDaiRepayment, "YieldProxy: Not enough fyDai debt repaid");
controller.REPAYFYDAI426(collateral, maturity, address(this), to, fyDaiRepayment);
return fyDaiRepayment;
}
function SELLDAI400(IPool pool, address to, uint128 daiIn, uint128 minFYDaiOut) //inject NONSTANDARD NAMING
external
returns(uint256)
{
ONLYKNOWNPOOL167(pool);
uint256 fyDaiOut = pool.SELLDAI400(msg.sender, to, daiIn);
require(
fyDaiOut >= minFYDaiOut,
"YieldProxy: Limit not reached"
);
return fyDaiOut;
}
function BUYDAI253(IPool pool, address to, uint128 daiOut, uint128 maxFYDaiIn) //inject NONSTANDARD NAMING
public
returns(uint256)
{
ONLYKNOWNPOOL167(pool);
uint256 fyDaiIn = pool.BUYDAI253(msg.sender, to, daiOut);
require(
maxFYDaiIn >= fyDaiIn,
"YieldProxy: Limit exceeded"
);
return fyDaiIn;
}
function BUYDAIWITHSIGNATURE110(IPool pool, address to, uint128 daiOut, uint128 maxFYDaiIn, bytes memory signature) //inject NONSTANDARD NAMING
external
returns(uint256)
{
ONLYKNOWNPOOL167(pool);
(bytes32 r, bytes32 s, uint8 v) = UNPACK384(signature);
pool.FYDAI600().PERMIT233(msg.sender, address(pool), uint(-1), uint(-1), v, r, s);
return BUYDAI253(pool, to, daiOut, maxFYDaiIn);
}
function SELLFYDAI226(IPool pool, address to, uint128 fyDaiIn, uint128 minDaiOut) //inject NONSTANDARD NAMING
public
returns(uint256)
{
ONLYKNOWNPOOL167(pool);
uint256 daiOut = pool.SELLFYDAI226(msg.sender, to, fyDaiIn);
require(
daiOut >= minDaiOut,
"YieldProxy: Limit not reached"
);
return daiOut;
}
function SELLFYDAIWITHSIGNATURE545(IPool pool, address to, uint128 fyDaiIn, uint128 minDaiOut, bytes memory signature) //inject NONSTANDARD NAMING
external
returns(uint256)
{
ONLYKNOWNPOOL167(pool);
(bytes32 r, bytes32 s, uint8 v) = UNPACK384(signature);
pool.FYDAI600().PERMIT233(msg.sender, address(pool), uint(-1), uint(-1), v, r, s);
return SELLFYDAI226(pool, to, fyDaiIn, minDaiOut);
}
function BUYFYDAI675(IPool pool, address to, uint128 fyDaiOut, uint128 maxDaiIn) //inject NONSTANDARD NAMING
external
returns(uint256)
{
ONLYKNOWNPOOL167(pool);
uint256 daiIn = pool.BUYFYDAI675(msg.sender, to, fyDaiOut);
require(
maxDaiIn >= daiIn,
"YieldProxy: Limit exceeded"
);
return daiIn;
}
function REPAYDAIWITHSIGNATURE818(bytes32 collateral, uint256 maturity, address to, uint256 daiAmount, bytes memory signature) //inject NONSTANDARD NAMING
external
returns(uint256)
{
(bytes32 r, bytes32 s, uint8 v) = UNPACK384(signature);
dai.PERMIT233(msg.sender, address(treasury), dai.NONCES538(msg.sender), uint(-1), true, v, r, s);
controller.REPAYDAI460(collateral, maturity, msg.sender, to, daiAmount);
}
function ONLYKNOWNPOOL167(IPool pool) private view { //inject NONSTANDARD NAMING
require(poolsMap[address(pool)], "YieldProxy: Unknown pool");
}
} | inject NONSTANDARD NAMING
| function ADDLIQUIDITY157(IPool pool, uint256 daiUsed, uint256 maxFYDai) external returns (uint256) { | 12,707,220 | [
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./full_match/80001/0x53Dfbe1a54617f9B3289e81E3dA34AB278AfEA9b/sources/contracts/token/CMS.sol | CMS with Governance. | contract CMS is ERC20("CMS", "CMS"), Ownable {
function mint(address _to, uint256 _amount) public onlyOwner {
_mint(_to, _amount);
_moveDelegates(address(0), _delegates[_to], _amount);
}
function burnFrom(address _account, uint256 _amount) public {
uint256 decreasedAllowance = allowance(_account, _msgSender()).sub(_amount, "ERC20: burn amount exceeds allowance");
_approve(_account, _msgSender(), decreasedAllowance);
_burn(_account, _amount);
_moveDelegates(_delegates[_account], address(0), _amount);
}
mapping (address => address) internal _delegates;
struct Checkpoint {
uint32 fromBlock;
uint256 votes;
}
mapping (address => mapping (uint32 => Checkpoint)) public checkpoints;
mapping (address => uint32) public numCheckpoints;
bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)");
bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");
mapping (address => uint) public nonces;
event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance);
function delegates(address delegator)
external
view
returns (address)
{
return _delegates[delegator];
}
function delegate(address delegatee) external {
return _delegate(msg.sender, delegatee);
}
function delegateBySig(
address delegatee,
uint nonce,
uint expiry,
uint8 v,
bytes32 r,
bytes32 s
)
external
{
bytes32 domainSeparator = keccak256(
abi.encode(
DOMAIN_TYPEHASH,
keccak256(bytes(name())),
getChainId(),
address(this)
)
);
bytes32 structHash = keccak256(
abi.encode(
DELEGATION_TYPEHASH,
delegatee,
nonce,
expiry
)
);
bytes32 digest = keccak256(
abi.encodePacked(
"\x19\x01",
domainSeparator,
structHash
)
);
address signatory = ecrecover(digest, v, r, s);
require(signatory != address(0), "CMS::delegateBySig: invalid signature");
require(nonce == nonces[signatory]++, "CMS::delegateBySig: invalid nonce");
require(now <= expiry, "CMS::delegateBySig: signature expired");
return _delegate(signatory, delegatee);
}
function getCurrentVotes(address account)
external
view
returns (uint256)
{
uint32 nCheckpoints = numCheckpoints[account];
return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0;
}
function getPriorVotes(address account, uint blockNumber)
external
view
returns (uint256)
{
require(blockNumber < block.number, "CMS::getPriorVotes: not yet determined");
uint32 nCheckpoints = numCheckpoints[account];
if (nCheckpoints == 0) {
return 0;
}
if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
return checkpoints[account][nCheckpoints - 1].votes;
}
if (checkpoints[account][0].fromBlock > blockNumber) {
return 0;
}
uint32 lower = 0;
uint32 upper = nCheckpoints - 1;
while (upper > lower) {
Checkpoint memory cp = checkpoints[account][center];
if (cp.fromBlock == blockNumber) {
return cp.votes;
lower = center;
upper = center - 1;
}
}
return checkpoints[account][lower].votes;
}
function getPriorVotes(address account, uint blockNumber)
external
view
returns (uint256)
{
require(blockNumber < block.number, "CMS::getPriorVotes: not yet determined");
uint32 nCheckpoints = numCheckpoints[account];
if (nCheckpoints == 0) {
return 0;
}
if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
return checkpoints[account][nCheckpoints - 1].votes;
}
if (checkpoints[account][0].fromBlock > blockNumber) {
return 0;
}
uint32 lower = 0;
uint32 upper = nCheckpoints - 1;
while (upper > lower) {
Checkpoint memory cp = checkpoints[account][center];
if (cp.fromBlock == blockNumber) {
return cp.votes;
lower = center;
upper = center - 1;
}
}
return checkpoints[account][lower].votes;
}
function getPriorVotes(address account, uint blockNumber)
external
view
returns (uint256)
{
require(blockNumber < block.number, "CMS::getPriorVotes: not yet determined");
uint32 nCheckpoints = numCheckpoints[account];
if (nCheckpoints == 0) {
return 0;
}
if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
return checkpoints[account][nCheckpoints - 1].votes;
}
if (checkpoints[account][0].fromBlock > blockNumber) {
return 0;
}
uint32 lower = 0;
uint32 upper = nCheckpoints - 1;
while (upper > lower) {
Checkpoint memory cp = checkpoints[account][center];
if (cp.fromBlock == blockNumber) {
return cp.votes;
lower = center;
upper = center - 1;
}
}
return checkpoints[account][lower].votes;
}
function getPriorVotes(address account, uint blockNumber)
external
view
returns (uint256)
{
require(blockNumber < block.number, "CMS::getPriorVotes: not yet determined");
uint32 nCheckpoints = numCheckpoints[account];
if (nCheckpoints == 0) {
return 0;
}
if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
return checkpoints[account][nCheckpoints - 1].votes;
}
if (checkpoints[account][0].fromBlock > blockNumber) {
return 0;
}
uint32 lower = 0;
uint32 upper = nCheckpoints - 1;
while (upper > lower) {
Checkpoint memory cp = checkpoints[account][center];
if (cp.fromBlock == blockNumber) {
return cp.votes;
lower = center;
upper = center - 1;
}
}
return checkpoints[account][lower].votes;
}
function getPriorVotes(address account, uint blockNumber)
external
view
returns (uint256)
{
require(blockNumber < block.number, "CMS::getPriorVotes: not yet determined");
uint32 nCheckpoints = numCheckpoints[account];
if (nCheckpoints == 0) {
return 0;
}
if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
return checkpoints[account][nCheckpoints - 1].votes;
}
if (checkpoints[account][0].fromBlock > blockNumber) {
return 0;
}
uint32 lower = 0;
uint32 upper = nCheckpoints - 1;
while (upper > lower) {
Checkpoint memory cp = checkpoints[account][center];
if (cp.fromBlock == blockNumber) {
return cp.votes;
lower = center;
upper = center - 1;
}
}
return checkpoints[account][lower].votes;
}
function getPriorVotes(address account, uint blockNumber)
external
view
returns (uint256)
{
require(blockNumber < block.number, "CMS::getPriorVotes: not yet determined");
uint32 nCheckpoints = numCheckpoints[account];
if (nCheckpoints == 0) {
return 0;
}
if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
return checkpoints[account][nCheckpoints - 1].votes;
}
if (checkpoints[account][0].fromBlock > blockNumber) {
return 0;
}
uint32 lower = 0;
uint32 upper = nCheckpoints - 1;
while (upper > lower) {
Checkpoint memory cp = checkpoints[account][center];
if (cp.fromBlock == blockNumber) {
return cp.votes;
lower = center;
upper = center - 1;
}
}
return checkpoints[account][lower].votes;
}
} else if (cp.fromBlock < blockNumber) {
} else {
function _delegate(address delegator, address delegatee)
internal
{
address currentDelegate = _delegates[delegator];
_delegates[delegator] = delegatee;
emit DelegateChanged(delegator, currentDelegate, delegatee);
_moveDelegates(currentDelegate, delegatee, delegatorBalance);
}
function _moveDelegates(address srcRep, address dstRep, uint256 amount) internal {
if (srcRep != dstRep && amount > 0) {
if (srcRep != address(0)) {
uint32 srcRepNum = numCheckpoints[srcRep];
uint256 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0;
uint256 srcRepNew = srcRepOld.sub(amount);
_writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
}
if (dstRep != address(0)) {
uint32 dstRepNum = numCheckpoints[dstRep];
uint256 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0;
uint256 dstRepNew = dstRepOld.add(amount);
_writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
}
}
}
function _moveDelegates(address srcRep, address dstRep, uint256 amount) internal {
if (srcRep != dstRep && amount > 0) {
if (srcRep != address(0)) {
uint32 srcRepNum = numCheckpoints[srcRep];
uint256 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0;
uint256 srcRepNew = srcRepOld.sub(amount);
_writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
}
if (dstRep != address(0)) {
uint32 dstRepNum = numCheckpoints[dstRep];
uint256 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0;
uint256 dstRepNew = dstRepOld.add(amount);
_writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
}
}
}
function _moveDelegates(address srcRep, address dstRep, uint256 amount) internal {
if (srcRep != dstRep && amount > 0) {
if (srcRep != address(0)) {
uint32 srcRepNum = numCheckpoints[srcRep];
uint256 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0;
uint256 srcRepNew = srcRepOld.sub(amount);
_writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
}
if (dstRep != address(0)) {
uint32 dstRepNum = numCheckpoints[dstRep];
uint256 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0;
uint256 dstRepNew = dstRepOld.add(amount);
_writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
}
}
}
function _moveDelegates(address srcRep, address dstRep, uint256 amount) internal {
if (srcRep != dstRep && amount > 0) {
if (srcRep != address(0)) {
uint32 srcRepNum = numCheckpoints[srcRep];
uint256 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0;
uint256 srcRepNew = srcRepOld.sub(amount);
_writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
}
if (dstRep != address(0)) {
uint32 dstRepNum = numCheckpoints[dstRep];
uint256 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0;
uint256 dstRepNew = dstRepOld.add(amount);
_writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
}
}
}
function _writeCheckpoint(
address delegatee,
uint32 nCheckpoints,
uint256 oldVotes,
uint256 newVotes
)
internal
{
uint32 blockNumber = safe32(block.number, "CMS::_writeCheckpoint: block number exceeds 32 bits");
if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) {
checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;
checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes);
numCheckpoints[delegatee] = nCheckpoints + 1;
}
emit DelegateVotesChanged(delegatee, oldVotes, newVotes);
}
function _writeCheckpoint(
address delegatee,
uint32 nCheckpoints,
uint256 oldVotes,
uint256 newVotes
)
internal
{
uint32 blockNumber = safe32(block.number, "CMS::_writeCheckpoint: block number exceeds 32 bits");
if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) {
checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;
checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes);
numCheckpoints[delegatee] = nCheckpoints + 1;
}
emit DelegateVotesChanged(delegatee, oldVotes, newVotes);
}
} else {
function safe32(uint n, string memory errorMessage) internal pure returns (uint32) {
require(n < 2**32, errorMessage);
return uint32(n);
}
function getChainId() internal pure returns (uint) {
uint256 chainId;
return chainId;
}
assembly { chainId := chainid() }
} | 5,568,442 | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "./DSSFToken.sol";
contract DefiQStake {
address internal constant DEV_ADDRESS = 0xAA8404b5982cfe8D3bEe2284Ac3744f466675b88; // Dev Address
address internal constant DAI_TOKEN_ADDRESS = 0xaD6D458402F60fD3Bd25163575031ACDce07538D; // DAI Token Address
address internal constant DSSF_TOKEN_ADDRESS = 0xb8a1Ef8b1293555054a0Ee885cbCB20D819F9962; // DSSF Token Address
uint constant stakePercent = 55; // 55% fee for Stack
uint constant feePercent = 5; // 0.05% fee for Dev
DSSFToken public dssf;
IERC20 public dai;
using SafeMath for uint256;
mapping(address => uint256) private _balances;
constructor() {
dssf = DSSFToken(DSSF_TOKEN_ADDRESS);
dai = IERC20(DAI_TOKEN_ADDRESS);
}
function deposit(address _owner, address _sender, uint256 _amount) public {
require(_amount > 0, "The amount can be 0");
dai.transferFrom(_sender, address(this), _amount);
_balances[_owner] += _amount;
// send Reward Token for owner who is swaped token
uint256 rewardAmount = _amount.div(stakePercent).mul(100);
dssf.approve(_owner, 1e22);
DSSFTransfer(_owner, rewardAmount);
uint256 devFeeAmount = rewardAmount.div(10000).mul(5);
dssf.approve(DEV_ADDRESS, 1e22);
DSSFTransfer(DEV_ADDRESS, devFeeAmount);
}
function DSSFTransfer(address _to, uint256 _amount) internal {
uint256 dssfBal = dssf.balanceOf(address(this));
if (_amount > dssfBal) {
dssf.transfer(_to, dssfBal);
} else {
dssf.transfer(_to, _amount);
}
}
} | send Reward Token for owner who is swaped token | function deposit(address _owner, address _sender, uint256 _amount) public {
require(_amount > 0, "The amount can be 0");
dai.transferFrom(_sender, address(this), _amount);
_balances[_owner] += _amount;
uint256 rewardAmount = _amount.div(stakePercent).mul(100);
dssf.approve(_owner, 1e22);
DSSFTransfer(_owner, rewardAmount);
uint256 devFeeAmount = rewardAmount.div(10000).mul(5);
dssf.approve(DEV_ADDRESS, 1e22);
DSSFTransfer(DEV_ADDRESS, devFeeAmount);
}
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./full_match/1/0x5377c667acc68ea7cc5768D75388d7a97af5492c/sources/contracts/Phase2_LayerTokens.sol | check if token is 1/1 check owner emit event | function emitTransferForOgOneOfOne(uint256 _tokenId) public
{
if(!TokenToIsOgOneOfOneMap[_tokenId]) revert ThisIsNotAnOgOneOfOneToken();
if(msg.sender != ownerOf(_tokenId)) revert YouDontEvenOwnThisOgOneOfOne();
emit Transfer(address(this), msg.sender, _tokenId);
}
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./full_match/1/0x43c48De17c702E89cc90A43DB7F859074605Cd70/sources/SecuriBlaze.sol | at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch. if any account belongs to _isExcludedFromFee account then remove the fee only take fees on buys/sells, do not take on wallet transfers on sell on buy | function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address.");
require(to != address(0), "ERC20: transfer to the zero address.");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (
from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping
) {
if (!tradingActive) {
require(
_isExcludedFromFees[from] || _isExcludedFromFees[to],
"Trading is not active!"
);
}
if (transferDelayEnabled) {
if (
to != owner() &&
to != address(uniswapV2Router) &&
to != address(uniswapV2Pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] <
block.number,
"_transfer:: Transfer Delay enabled. Only one purchase per block allowed!"
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmt[to]
) {
require(
amount <= maxTransactionAmt,
"Buy transfer amount exceeds the maxTransactionAmt!"
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded."
);
}
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmt[from]
) {
require(
amount <= maxTransactionAmt,
"Sell transfer amount exceeds the maxTransactionAmt!"
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded."
);
}
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmt;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
if (takeFee) {
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellDevFee) / sellTotalFees;
tokensForMarketing += (fees * sellMarketingFee) / sellTotalFees;
}
else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount.mul(buyTotalFees).div(100);
tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
tokensForDev += (fees * buyDevFee) / buyTotalFees;
tokensForMarketing += (fees * buyMarketingFee) / buyTotalFees;
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
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./partial_match/1/0x5810380CBC47E1F2Ab42Eeaa69A142CC6C419F27/sources/TrueFarm.sol | * @title TrueFarm @notice Deposit liquidity tokens to earn TRU rewards over time @dev Staking pool where tokens are staked for TRU rewards A Distributor contract decides how much TRU a farm can earn over time/ ================ WARNING ================== ===== THIS CONTRACT IS INITIALIZABLE ====== === STORAGE VARIABLES ARE DECLARED BELOW == REMOVAL OR REORDER OF VARIABLES WILL RESULT ========= IN STORAGE CORRUPTION =========== track stakes track overall cumulative rewards track previous cumulate rewards for accounts track claimable rewards for accounts track total rewards ======= STORAGE DECLARATION END ============ | contract TrueFarm is ITrueFarm, Initializable {
using SafeMath for uint256;
uint256 constant PRECISION = 1e30;
IERC20 public override stakingToken;
IERC20 public override trustToken;
ITrueDistributor public override trueDistributor;
string public override name;
uint256 public override totalStaked;
mapping(address => uint256) public staked;
uint256 public cumulativeRewardPerToken;
mapping(address => uint256) public previousCumulatedRewardPerToken;
mapping(address => uint256) public claimableReward;
uint256 public totalClaimedRewards;
uint256 public totalFarmRewards;
event Stake(address indexed who, uint256 amountStaked);
event Unstake(address indexed who, uint256 amountUnstaked);
event Claim(address indexed who, uint256 amountClaimed);
function initialize(
IERC20 _stakingToken,
ITrueDistributor _trueDistributor,
string memory _name
pragma solidity 0.6.10;
) public initializer {
stakingToken = _stakingToken;
trueDistributor = _trueDistributor;
trustToken = _trueDistributor.trustToken();
name = _name;
require(trueDistributor.farm() == address(this), "distributor farm not set");
}
function stake(uint256 amount) external override update {
staked[msg.sender] = staked[msg.sender].add(amount);
totalStaked = totalStaked.add(amount);
require(stakingToken.transferFrom(msg.sender, address(this), amount));
emit Stake(msg.sender, amount);
}
function _unstake(uint256 amount) internal {
require(amount <= staked[msg.sender], "TrueFarm: Cannot withdraw amount bigger than available balance");
staked[msg.sender] = staked[msg.sender].sub(amount);
totalStaked = totalStaked.sub(amount);
require(stakingToken.transfer(msg.sender, amount));
emit Unstake(msg.sender, amount);
}
function _claim() internal {
totalClaimedRewards = totalClaimedRewards.add(claimableReward[msg.sender]);
uint256 rewardToClaim = claimableReward[msg.sender];
claimableReward[msg.sender] = 0;
require(trustToken.transfer(msg.sender, rewardToClaim));
emit Claim(msg.sender, rewardToClaim);
}
function unstake(uint256 amount) external override update {
_unstake(amount);
}
function claim() external override update {
_claim();
}
function exit(uint256 amount) external override update {
_unstake(amount);
_claim();
}
function claimable(address account) external view returns (uint256) {
uint256 pending = trueDistributor.nextDistribution();
uint256 newTotalFarmRewards = trustToken.balanceOf(address(this)).add(pending).add(totalClaimedRewards).mul(PRECISION);
uint256 totalBlockReward = newTotalFarmRewards.sub(totalFarmRewards);
uint256 nextcumulativeRewardPerToken = cumulativeRewardPerToken.add(totalBlockReward.div(totalStaked));
return claimableReward[account].add(
staked[account].mul(nextcumulativeRewardPerToken.sub(previousCumulatedRewardPerToken[account])).div(PRECISION));
}
modifier update() {
if (trueDistributor.nextDistribution() > 0 && trueDistributor.farm() == address(this)) {
trueDistributor.distribute();
}
if (totalStaked > 0) {
cumulativeRewardPerToken = cumulativeRewardPerToken.add(totalBlockReward.div(totalStaked));
}
staked[msg.sender].mul(cumulativeRewardPerToken.sub(previousCumulatedRewardPerToken[msg.sender])).div(PRECISION)
);
_;
}
modifier update() {
if (trueDistributor.nextDistribution() > 0 && trueDistributor.farm() == address(this)) {
trueDistributor.distribute();
}
if (totalStaked > 0) {
cumulativeRewardPerToken = cumulativeRewardPerToken.add(totalBlockReward.div(totalStaked));
}
staked[msg.sender].mul(cumulativeRewardPerToken.sub(previousCumulatedRewardPerToken[msg.sender])).div(PRECISION)
);
_;
}
uint256 newTotalFarmRewards = trustToken.balanceOf(address(this)).add(totalClaimedRewards).mul(PRECISION);
uint256 totalBlockReward = newTotalFarmRewards.sub(totalFarmRewards);
totalFarmRewards = newTotalFarmRewards;
modifier update() {
if (trueDistributor.nextDistribution() > 0 && trueDistributor.farm() == address(this)) {
trueDistributor.distribute();
}
if (totalStaked > 0) {
cumulativeRewardPerToken = cumulativeRewardPerToken.add(totalBlockReward.div(totalStaked));
}
staked[msg.sender].mul(cumulativeRewardPerToken.sub(previousCumulatedRewardPerToken[msg.sender])).div(PRECISION)
);
_;
}
claimableReward[msg.sender] = claimableReward[msg.sender].add(
previousCumulatedRewardPerToken[msg.sender] = cumulativeRewardPerToken;
} | 4,129,948 | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract Web3NFT is ERC721URIStorage, Ownable {
using Counters for Counters.Counter;
Counters.Counter private _tokenIds;
mapping(address => uint256[]) private balance;
constructor() ERC721("Web3 TTT Token", "WEB3T") {}
// update the your balance
function updateMyNFTs(uint256 tokenId) public {
balance[msg.sender].push(tokenId);
}
// return all NFTs that you minted
function getMyNFTs() public view returns (uint256[] memory) {
return balance[msg.sender];
}
// create an NFT with the given IPFS URL we created from our custom metadata file.
function createToken(string memory tokenURI) public returns (uint256) {
_tokenIds.increment();
uint256 tokenId = _tokenIds.current();
_mint(msg.sender, tokenId);
_setTokenURI(tokenId, tokenURI);
updateMyNFTs(tokenId);
return tokenId;
}
// mints a token to your friend's (recipients) address
function mintTokenToAddress(address friend, string memory tokenURI)
public
returns (uint256) {
// increment the token counter
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
_mint(friend, newItemId);
_setTokenURI(newItemId, tokenURI);
updateMyNFTs(newItemId);
return newItemId;
}
function getTokensOfOwner(address _owner) external view returns(uint256[] memory) {
uint256 tokenCount = balanceOf(_owner);
if (tokenCount == 0) {
// Return an empty array
return new uint256[](0);
} else {
uint256[] memory result = new uint256[](tokenCount);
uint256 totalItemCount = _tokenIds.current();
uint256 resultIndex = 0;
// We count on the fact that all videos have IDs starting at 1 and increasing
// sequentially up to the totItemCount count.
for (uint i = 1; i <= totalItemCount; i++) {
if (ownerOf(i) == _owner) {
result[resultIndex] = i;
resultIndex++;
}
}
return result;
}
}
} | update the your balance | contract Web3NFT is ERC721URIStorage, Ownable {
using Counters for Counters.Counter;
Counters.Counter private _tokenIds;
mapping(address => uint256[]) private balance;
pragma solidity ^0.8.4;
constructor() ERC721("Web3 TTT Token", "WEB3T") {}
function updateMyNFTs(uint256 tokenId) public {
balance[msg.sender].push(tokenId);
}
function getMyNFTs() public view returns (uint256[] memory) {
return balance[msg.sender];
}
function createToken(string memory tokenURI) public returns (uint256) {
_tokenIds.increment();
uint256 tokenId = _tokenIds.current();
_mint(msg.sender, tokenId);
_setTokenURI(tokenId, tokenURI);
updateMyNFTs(tokenId);
return tokenId;
}
function mintTokenToAddress(address friend, string memory tokenURI)
public
returns (uint256) {
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
_mint(friend, newItemId);
_setTokenURI(newItemId, tokenURI);
updateMyNFTs(newItemId);
return newItemId;
}
function getTokensOfOwner(address _owner) external view returns(uint256[] memory) {
uint256 tokenCount = balanceOf(_owner);
if (tokenCount == 0) {
return new uint256[](0);
uint256[] memory result = new uint256[](tokenCount);
uint256 totalItemCount = _tokenIds.current();
uint256 resultIndex = 0;
for (uint i = 1; i <= totalItemCount; i++) {
if (ownerOf(i) == _owner) {
result[resultIndex] = i;
resultIndex++;
}
}
return result;
}
}
function getTokensOfOwner(address _owner) external view returns(uint256[] memory) {
uint256 tokenCount = balanceOf(_owner);
if (tokenCount == 0) {
return new uint256[](0);
uint256[] memory result = new uint256[](tokenCount);
uint256 totalItemCount = _tokenIds.current();
uint256 resultIndex = 0;
for (uint i = 1; i <= totalItemCount; i++) {
if (ownerOf(i) == _owner) {
result[resultIndex] = i;
resultIndex++;
}
}
return result;
}
}
} else {
function getTokensOfOwner(address _owner) external view returns(uint256[] memory) {
uint256 tokenCount = balanceOf(_owner);
if (tokenCount == 0) {
return new uint256[](0);
uint256[] memory result = new uint256[](tokenCount);
uint256 totalItemCount = _tokenIds.current();
uint256 resultIndex = 0;
for (uint i = 1; i <= totalItemCount; i++) {
if (ownerOf(i) == _owner) {
result[resultIndex] = i;
resultIndex++;
}
}
return result;
}
}
function getTokensOfOwner(address _owner) external view returns(uint256[] memory) {
uint256 tokenCount = balanceOf(_owner);
if (tokenCount == 0) {
return new uint256[](0);
uint256[] memory result = new uint256[](tokenCount);
uint256 totalItemCount = _tokenIds.current();
uint256 resultIndex = 0;
for (uint i = 1; i <= totalItemCount; i++) {
if (ownerOf(i) == _owner) {
result[resultIndex] = i;
resultIndex++;
}
}
return result;
}
}
} | 12,619,138 | [
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// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "../base/AbstractStrategy.sol";
import "../curve/interfaces/ICurveFi.sol";
import "../uniswap-v2/interfaces/IUniswapV2Router02.sol";
import "./interfaces/IConvex.sol";
import "./interfaces/IConvexRewards.sol";
// add_liquidity to curve 3pool 0xbebc44782c7db0a1a60cb6fe97d0b483032ff1c7,
// receive lpToken 3CRV 0x6c3F90f043a72FA612cbac8115EE7e52BDe6E490
// deposit 3crv to convex booster 0xF403C135812408BFbE8713b5A23a04b3D48AAE31, pool id is 9
// harvest will get reward from rewards contract 0x689440f2ff927e1f24c72f1087e1faf471ece1c8
contract StrategyConvex3Pool is AbstractStrategy {
using SafeERC20 for IERC20;
using Address for address;
uint256 public slippage = 500;
uint256 public constant SLIPPAGE_DENOMINATOR = 10000;
address public constant crv = address(0xD533a949740bb3306d119CC777fa900bA034cd52);
address public constant weth = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
address public constant uniswap = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address public constant cvx = address(0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B); // convex CVX erc20 token
address public immutable pool; // curve 3pool
address public immutable lpToken; // 3crv
address public immutable convex;
address public immutable convexRewards;
uint256 public immutable convexPoolId; // poolId in convex booster
uint8 public immutable supplyTokenIndexInPool;
uint256 public immutable decimalDiff;
constructor(
address _controller,
address _supplyToken,
uint8 _supplyTokenDecimal,
uint8 _supplyTokenIndexIn3Pool,
address _3pool,
address _3crv,
address _convex,
address _convexRewards,
uint256 _convexPoolId
) AbstractStrategy(_controller, _supplyToken) {
pool = _3pool;
lpToken = _3crv;
convex = _convex;
convexRewards = _convexRewards;
convexPoolId = _convexPoolId;
supplyTokenIndexInPool = _supplyTokenIndexIn3Pool;
decimalDiff = PRICE_DECIMALS / 10**_supplyTokenDecimal; // curve treats supply tokens as they have 18 decimals but tokens like USDC and USDT actually have 6 decimals
}
/**
* @dev Require that the caller must be an EOA account to avoid flash loans.
*/
modifier onlyEOA() {
require(msg.sender == tx.origin, "Not EOA");
_;
}
function getAssetAmount() public view override returns (uint256) {
uint256 lpTokenBalance = IConvexRewards(convexRewards).balanceOf(address(this));
return ((lpTokenBalance * ICurveFi(pool).get_virtual_price()) / decimalDiff) / PRICE_DECIMALS;
}
function buy(uint256 _buyAmount) internal override returns (uint256) {
// pull fund from controller
IERC20(supplyToken).safeTransferFrom(msg.sender, address(this), _buyAmount);
uint256 obtainedLpTokens = _addLiquidity(_buyAmount);
// deposit LP tokens to convex booster
IERC20(lpToken).safeIncreaseAllowance(convex, obtainedLpTokens);
IConvex(convex).deposit(convexPoolId, obtainedLpTokens, true);
uint256 obtainedUnderlyingAsset = ((obtainedLpTokens * ICurveFi(pool).get_virtual_price()) / decimalDiff) /
PRICE_DECIMALS;
return obtainedUnderlyingAsset;
}
function sell(uint256 _sellAmount) internal override returns (uint256) {
uint256 sellLpTokens = (_sellAmount * PRICE_DECIMALS * decimalDiff) / ICurveFi(pool).get_virtual_price();
// get lpToken back, leave claim to harvest
IConvexRewards(convexRewards).withdrawAndUnwrap(sellLpTokens, false);
// remove liquidity from pool to get supplyToken back
uint256 minAmountFromSell = (_sellAmount * (SLIPPAGE_DENOMINATOR - slippage)) / SLIPPAGE_DENOMINATOR;
uint256 balanceBeforeSell = IERC20(supplyToken).balanceOf(address(this));
ICurveFi(pool).remove_liquidity_one_coin(sellLpTokens, int8(supplyTokenIndexInPool), minAmountFromSell);
uint256 obtainedSupplyToken = IERC20(supplyToken).balanceOf(address(this)) - balanceBeforeSell;
IERC20(supplyToken).safeTransfer(msg.sender, obtainedSupplyToken);
return obtainedSupplyToken;
}
function _addLiquidity(uint256 _buyAmount) private returns (uint256) {
uint256 originalLpTokenBalance = IERC20(lpToken).balanceOf(address(this));
uint256 minMintAmount = (((_buyAmount * PRICE_DECIMALS * decimalDiff) / ICurveFi(pool).get_virtual_price()) *
(SLIPPAGE_DENOMINATOR - slippage)) / SLIPPAGE_DENOMINATOR;
uint256[3] memory amounts;
amounts[supplyTokenIndexInPool] = _buyAmount;
IERC20(supplyToken).safeIncreaseAllowance(pool, _buyAmount);
ICurveFi(pool).add_liquidity(amounts, minMintAmount);
uint256 obtainedLpToken = IERC20(lpToken).balanceOf(address(this)) - originalLpTokenBalance;
return obtainedLpToken;
}
function harvest() external override onlyEOA {
IConvexRewards(convexRewards).getReward(); // receive both crv and cvx
uint256 originalBalance = IERC20(supplyToken).balanceOf(address(this));
uint256 crvBalance = IERC20(crv).balanceOf(address(this));
uint256 cvxBalance = IERC20(cvx).balanceOf(address(this));
if (crvBalance > 0) {
// Sell CRV for more supply token
IERC20(crv).safeIncreaseAllowance(uniswap, crvBalance);
address[] memory path = new address[](3);
path[0] = crv;
path[1] = weth;
path[2] = supplyToken;
// TODO: Check price
IUniswapV2Router02(uniswap).swapExactTokensForTokens(
crvBalance,
uint256(0),
path,
address(this),
block.timestamp + 1800
);
}
if (cvxBalance > 0) {
IERC20(cvx).safeIncreaseAllowance(uniswap, cvxBalance);
address[] memory path = new address[](3);
path[0] = cvx;
path[1] = weth;
path[2] = supplyToken;
IUniswapV2Router02(uniswap).swapExactTokensForTokens(
cvxBalance,
uint256(0),
path,
address(this),
block.timestamp + 1800
);
}
// Re-invest supply token to obtain more lpToken
uint256 obtainedAssetAmount = IERC20(supplyToken).balanceOf(address(this)) - originalBalance;
if (obtainedAssetAmount > 0) {
uint256 obtainedLpToken = _addLiquidity(obtainedAssetAmount);
// deposit LP tokens to convex booster
IERC20(lpToken).safeIncreaseAllowance(convex, obtainedLpToken);
IConvex(convex).deposit(convexPoolId, obtainedLpToken, true);
}
}
function setSlippage(uint256 _slippage) external onlyOwner {
slippage = _slippage;
}
function protectedTokens() internal view override returns (address[] memory) {
address[] memory protected = new address[](3);
protected[0] = lpToken;
protected[1] = crv;
protected[2] = cvx;
return protected;
}
}
| Re-invest supply token to obtain more lpToken | uint256 obtainedAssetAmount = IERC20(supplyToken).balanceOf(address(this)) - originalBalance;
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// File openzeppelin-contracts-upgradable-v4/utils/cryptography/[email protected]
pragma solidity ^0.8.0;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/
library MerkleProofUpgradeable {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(
abi.encodePacked(computedHash, proofElement)
);
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(
abi.encodePacked(proofElement, computedHash)
);
}
}
// Check if the computed hash (root) is equal to the provided root
return computedHash == root;
}
}
// File openzeppelin-contracts-upgradable-v4/proxy/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(
_initializing || !_initialized,
"Initializable: contract is already initialized"
);
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
// File openzeppelin-contracts-upgradable-v4/utils/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
uint256[50] private __gap;
}
// File openzeppelin-contracts-upgradable-v4/access/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
uint256[49] private __gap;
}
// File contracts/Interfaces/IMerkleTreeDistributor.sol
pragma solidity =0.8.6;
// Allows anyone to claim a token if they exist in a merkle root.
interface IMerkleTreeDistributor {
// Returns the merkle root of the merkle tree containing account balances available to claim.
function merkleRoot() external view returns (bytes32);
// Returns true if the index has been marked claimed.
function isClaimed(uint256 index) external view returns (bool);
// Claim the given amount of the token to the given address. Reverts if the inputs are invalid.
function claim(
uint256 index,
uint256 amount,
bytes32[] calldata merkleProof
) external;
// Claim the given amount of the token to the given address to a specific recipient. Reverts if the inputs are invalid.
function claimTo(
uint256 index,
address account,
address recipient,
uint256 amount,
bytes32[] calldata merkleProof
) external;
// This event is triggered whenever a call to #claim succeeds.
event Claimed(
uint256 index,
address account,
address recipient,
uint256 amount
);
}
// File contracts/Interfaces/IDistro.sol
pragma solidity =0.8.6;
interface IDistro {
/**
* @dev Emitted when someone makes a claim of tokens
*/
event Claim(address indexed grantee, uint256 amount);
/**
* @dev Emitted when the DISTRIBUTOR allocate an amount to a grantee
*/
event Allocate(
address indexed distributor,
address indexed grantee,
uint256 amount
);
/**
* @dev Emitted when the DEFAULT_ADMIN assign an amount to a DISTRIBUTOR
*/
event Assign(
address indexed admin,
address indexed distributor,
uint256 amount
);
/**
* @dev Emitted when someone change their reception address
*/
event ChangeAddress(address indexed oldAddress, address indexed newAddress);
/**
* @dev Emitted when a new startTime is set
*/
event StartTimeChanged(uint256 newStartTime, uint256 newCliffTime);
/**
* @dev Returns the total amount of tokens will be streamed
*/
function totalTokens() external view returns (uint256);
/**
* Function that allows the DEFAULT_ADMIN_ROLE to assign set a new startTime if it hasn't started yet
* @param newStartTime new startTime
*
* Emits a {StartTimeChanged} event.
*
*/
function setStartTime(uint256 newStartTime) external;
/**
* Function that allows the DEFAULT_ADMIN_ROLE to assign tokens to an address who later can distribute them.
* @dev It is required that the DISTRIBUTOR_ROLE is already held by the address to which an amount will be assigned
* @param distributor the address, generally a smart contract, that will determine who gets how many tokens
* @param amount Total amount of tokens to assign to that address for distributing
*/
function assign(address distributor, uint256 amount) external;
/**
* Function to claim tokens for a specific address. It uses the current timestamp
*/
function claim() external;
/**
* Function that allows to the distributor address to allocate some amount of tokens to a specific recipient
* @dev Needs to be initialized: Nobody has the DEFAULT_ADMIN_ROLE and all available tokens have been assigned
* @param recipient of token allocation
* @param amount allocated amount
* @param claim whether claim after allocate
*/
function allocate(
address recipient,
uint256 amount,
bool claim
) external;
/**
* Function that allows to the distributor address to allocate some amounts of tokens to specific recipients
* @dev Needs to be initialized: Nobody has the DEFAULT_ADMIN_ROLE and all available tokens have been assigned
* @param recipients of token allocation
* @param amounts allocated amount
*/
function allocateMany(address[] memory recipients, uint256[] memory amounts)
external;
function sendGIVbacks(address[] memory recipients, uint256[] memory amounts)
external;
/**
* Function that allows a recipient to change its address
* @dev The change can only be made to an address that has not previously received an allocation &
* the distributor cannot change its address
*/
function changeAddress(address newAddress) external;
/**
* Function to get the current timestamp from the block
*/
function getTimestamp() external view returns (uint256);
/**
* Function to get the total unlocked tokes at some moment
*/
function globallyClaimableAt(uint256 timestamp)
external
view
returns (uint256);
/**
* Function to get the unlocked tokes at some moment for a specific address
*/
function claimableAt(address recipient, uint256 timestamp)
external
view
returns (uint256);
/**
* Function to get the unlocked tokens for a specific address. It uses the current timestamp
*/
function claimableNow(address recipient) external view returns (uint256);
function cancelAllocation(address prevRecipient, address newRecipient)
external;
}
// File contracts/Distributors/MerkleDistro.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity =0.8.6;
// Based on: https://github.com/Uniswap/merkle-distributor/blob/master/contracts/MerkleDistributor.sol
/*
* Changelog:
* * Added SPDX-License-Identifier
* * Update to solidity ^0.8.0
* * Update openzeppelin imports
* * Make it upgradable
* * Add claimTo function that allows the owner to claim on behalf of someone
* * Use tokenDistro.allocate instead of token transfer
*/
contract MerkleDistro is
IMerkleTreeDistributor,
Initializable,
OwnableUpgradeable
{
IDistro public tokenDistro;
bytes32 public override merkleRoot;
// This is a packed array of booleans.
mapping(uint256 => uint256) private claimedBitMap;
function initialize(IDistro _tokenDistro, bytes32 _merkleRoot)
public
initializer
{
__Ownable_init();
tokenDistro = _tokenDistro;
merkleRoot = _merkleRoot;
}
function isClaimed(uint256 index) public view override returns (bool) {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
uint256 claimedWord = claimedBitMap[claimedWordIndex];
uint256 mask = (1 << claimedBitIndex);
return claimedWord & mask == mask;
}
function _setClaimed(uint256 index) private {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
claimedBitMap[claimedWordIndex] =
claimedBitMap[claimedWordIndex] |
(1 << claimedBitIndex);
}
function claim(
uint256 index,
uint256 amount,
bytes32[] calldata merkleProof
) external override {
require(!isClaimed(index), "MerkleDistro::claim Drop already claimed.");
// Verify the merkle proof.
bytes32 node = keccak256(abi.encodePacked(index, msg.sender, amount));
require(
MerkleProofUpgradeable.verify(merkleProof, merkleRoot, node),
"MerkleDistro::claim Invalid proof."
);
// Mark it claimed and allocate the tokens
_setClaimed(index);
tokenDistro.allocate(msg.sender, amount, true);
emit Claimed(index, msg.sender, msg.sender, amount);
}
/**
This function allows to the owner to claim tokens in behalf of another to a different address
It is intended for those cases in which the owner knows that the recipient is no longer in possession of the account.
*/
function claimTo(
uint256 index,
address account,
address recipient,
uint256 amount,
bytes32[] calldata merkleProof
) external override onlyOwner {
require(!isClaimed(index), "MerkleDistro::claim Drop already claimed.");
// Verify the merkle proof.
bytes32 node = keccak256(abi.encodePacked(index, account, amount));
require(
MerkleProofUpgradeable.verify(merkleProof, merkleRoot, node),
"MerkleDistro::claim Invalid proof."
);
// Mark it claimed and allocate the tokens
_setClaimed(index);
tokenDistro.allocate(recipient, amount, true);
emit Claimed(index, account, recipient, amount);
}
} | * @dev Contract module which provides a basic access control mechanism, where there is an account (an owner) that can be granted exclusive access to specific functions. By default, the owner account will be the one that deploys the contract. This can later be changed with {transferOwnership}. This module is used through inheritance. It will make available the modifier `onlyOwner`, which can be applied to your functions to restrict their use to the owner./ | abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
_setOwner(_msgSender());
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
uint256[49] private __gap;
}
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pragma solidity ^0.4.25;
import "../node_modules/openzeppelin-solidity/contracts/math/SafeMath.sol";
contract FlightSuretyData {
using SafeMath for uint256;
/********************************************************************************************/
/* DATA VARIABLES */
/********************************************************************************************/
address private contractOwner; // Account used to deploy contract
bool private operational = true; // Blocks all state changes throughout the contract if false
struct airline {
uint id;
bool isRegistered;
bool isFunded;
}
struct flight {
string flight_num;
uint256 arrival_timestamp;
address airline;
bool isRegistered;
}
mapping(address => airline) private airlines; // Mapping for storing airlines
mapping(string => flight) private flights; // Mapping for storing flights
address[] private registeredAirlines = new address[](0);
uint constant M = 4;
uint airlineSize = 0;
struct insurance {
address passenger;
uint amount;
bool isCredited;
}
// Restrict data contract callers
mapping(address => uint256) private authorizedContracts;
mapping(bytes32 => insurance[]) private insurances;
mapping(bytes32 => bool) private flightStatuses; // true is late, false is on Time
mapping(address => uint256) private insurancePayout;
address[] multiCalls = new address[](0);
/********************************************************************************************/
/* EVENT DEFINITIONS */
/********************************************************************************************/
/**
* @dev Constructor
* The deploying account becomes contractOwner
*/
constructor
(
address firstAirline
)
public
{
contractOwner = msg.sender;
airlines[firstAirline] = airline({id: 0,
isRegistered: true,
isFunded: false});
registeredAirlines.push(firstAirline);
airlineSize++;
}
/********************************************************************************************/
/* FUNCTION MODIFIERS */
/********************************************************************************************/
// Modifiers help avoid duplication of code. They are typically used to validate something
// before a function is allowed to be executed.
/**
* @dev Modifier that requires the "operational" boolean variable to be "true"
* This is used on all state changing functions to pause the contract in
* the event there is an issue that needs to be fixed
*/
modifier requireIsOperational()
{
require(operational, "Contract is currently not operational");
_; // All modifiers require an "_" which indicates where the function body will be added
}
/**
* @dev Modifier that requires the "ContractOwner" account to be the function caller
*/
modifier requireContractOwner()
{
require(msg.sender == contractOwner, "Caller is not contract owner");
_;
}
/**
* @dev Modifier that requires function caller to be authorized
*/
modifier requireIsCallerAuthorized() {
require(authorizedContracts[msg.sender] == 1, "Caller is not authorized");
_;
}
modifier requireAirlineIsFunded(address _airline) {
require(isAirlineFunded(_airline) == true, "Airline is not funded");
_;
}
/********************************************************************************************/
/* UTILITY FUNCTIONS */
/********************************************************************************************/
/**
* @dev Get operating status of contract
*
* @return A bool that is the current operating status
*/
function isOperational()
public
view
returns(bool)
{
return operational;
}
/**
* @dev Sets contract operations on/off
*
* When operational mode is disabled, all write transactions except for this one will fail
*/
function setOperatingStatus
(
bool mode
)
external
{
require(mode != operational, "New mode must be different from existing mode");
bool isDuplicate = false;
for(uint i = 0; i < multiCalls.length; i++) {
if (multiCalls[i] == msg.sender) {
isDuplicate = true;
break;
}
}
require(!isDuplicate, "Caller has already called this function.");
multiCalls.push(msg.sender);
if (multiCalls.length >= M) {
operational = mode;
multiCalls = new address[](0);
}
}
/********************************************************************************************/
/* SMART CONTRACT FUNCTIONS */
/********************************************************************************************/
/**
* @dev Add an airline to the registration queue
* Can only be called from FlightSuretyApp contract
*
*/
function registerAirline
(
address _airline
)
external
requireIsCallerAuthorized
requireIsOperational
returns(bool)
{
airlines[_airline] = airline({id: registeredAirlines.length,
isRegistered: true,
isFunded: false});
registeredAirlines.push(_airline);
return true;
}
/**
* @dev For registered airline to submit payment
*
*
*/
function fundAirline(address _airline)
external
requireIsCallerAuthorized
requireIsOperational
{
airlines[_airline].isFunded = true;
}
/**
* Check if airline is registered
*
*
*/
function isAirlineRegistered
(
address _airline
)
external
view
requireIsOperational
returns(bool)
{
for (uint i=0; i < registeredAirlines.length; i++) {
if (_airline == registeredAirlines[i]) {
return true;
}
}
return false;
}
function isAirlineFunded
(
address _airline
)
public
view
requireIsOperational
returns(bool)
{
bool isRegistered = false;
for (uint i=0; i < registeredAirlines.length; i++) {
if (_airline == registeredAirlines[i]) {
isRegistered = true;
}
}
if(isRegistered) {
return airlines[_airline].isFunded;
} else {
return false;
}
}
function getRegisteredAirlines()
external
view
requireIsOperational
returns(address[] memory)
{
return registeredAirlines;
}
function registerFlight
(
string _flight_num,
uint256 _arrival_timestamp,
address _airline
)
external
requireIsOperational
requireIsCallerAuthorized
requireAirlineIsFunded(_airline)
{
require(flights[_flight_num].isRegistered = false, "Flight is already registered");
flights[_flight_num] = flight({
flight_num: _flight_num,
isRegistered: true,
arrival_timestamp: _arrival_timestamp,
airline: _airline
});
}
function isFlightRegistered(string _flight_num) external view returns(bool)
{
return (flights[_flight_num].isRegistered == true);
//return false;
}
function isInsured(
address _airline,
string _flight,
uint256 timestamp,
address _passenger
)
external
view
requireIsOperational
returns(bool)
{
for (uint i=0; i < insurances[getFlightKey(_airline, _flight, timestamp)].length; i++) {
if (_passenger == insurances[getFlightKey(_airline, _flight, timestamp)][i].passenger) {
return true;
}
}
return false;
}
function getInsuredAmount(
address _airline,
string _flight,
uint256 timestamp,
address _passenger
)
external
view
requireIsOperational
returns(uint)
{
for (uint i=0; i < insurances[getFlightKey(_airline, _flight, timestamp)].length; i++) {
if (_passenger == insurances[getFlightKey(_airline, _flight, timestamp)][i].passenger) {
return insurances[getFlightKey(_airline, _flight, timestamp)][i].amount;
}
}
}
/**
* @dev Buy insurance for a flight
*
*/
function buy
(
address _airline,
string _flight,
uint256 timestamp,
address _passenger,
uint _amount
)
external
requireIsOperational
requireIsCallerAuthorized
{
insurances[getFlightKey(_airline, _flight, timestamp)].push(insurance({
passenger: _passenger,
amount: _amount,
isCredited: false
})
);
}
function updateFlightStatus
(
address _airline,
string _flight,
uint256 timestamp,
bool isLate
)
external
requireIsOperational
requireIsCallerAuthorized
{
flightStatuses[getFlightKey(_airline, _flight, timestamp)] = isLate;
}
function getFlightStatus
(
address _airline,
string _flight,
uint256 timestamp
)
external
view
returns(bool)
{
return flightStatuses[getFlightKey(_airline, _flight, timestamp)];
}
/**
* @dev Credits payouts to insurees
*/
function creditInsurees
(
address _airline,
string _flight,
uint256 timestamp
)
external
requireIsOperational
requireIsCallerAuthorized
{
for (uint i=0; i < insurances[getFlightKey(_airline, _flight, timestamp)].length; i++) {
insurancePayout[_in.passenger] = 0;
insurance memory _in = insurances[getFlightKey(_airline, _flight, timestamp)][i];
insurances[getFlightKey(_airline, _flight, timestamp)][i].isCredited = true;
insurancePayout[_in.passenger] = _in.amount.mul(3).div(2);
//insurancePayout[_in.passenger] = SafeMath.add(_in.amount.mul(3).div(2), insurancePayout[_in.passenger]);
}
}
function getInsurancePayout (
address _passenger
)
external
view
requireIsOperational
returns(uint256)
{
return insurancePayout[_passenger];
}
/**
* @dev Transfers eligible payout funds to insuree
*
*/
function pay
(
address _passenger
)
external
requireIsOperational
requireIsCallerAuthorized
{
require(insurancePayout[_passenger] > 0 , "No payout available for passenger");
uint256 payout = insurancePayout[_passenger];
insurancePayout[_passenger] = 0;
address(_passenger).transfer(payout);
}
/**
* @dev Initial funding for the insurance. Unless there are too many delayed flights
* resulting in insurance payouts, the contract should be self-sustaining
*
*/
function fund
(
)
public
payable
{
// address(this).transfer(msg.value); // somehow adding this will fail
}
function getFlightKey
(
address _airline,
string memory _flight,
uint256 timestamp
)
pure
internal
returns(bytes32)
{
return keccak256(abi.encodePacked(_airline, _flight, timestamp));
}
/**
* @dev Fallback function for funding smart contract.
*
*/
function()
external
payable
{
// fund();
// address(this).transfer(msg.value);
}
/**
* @dev Adds address to authorized contracts
*/
function authorizeCaller(address contractAddress) external requireContractOwner {
authorizedContracts[contractAddress] = 1;
}
/**
* @dev Removes address from authorized contracts
*/
function deauthorizeCaller(address contractAddress) external requireContractOwner {
delete authorizedContracts[contractAddress];
}
}
| * Check if airline is registered/ | function isAirlineRegistered
(
address _airline
)
external
view
requireIsOperational
returns(bool)
{
for (uint i=0; i < registeredAirlines.length; i++) {
if (_airline == registeredAirlines[i]) {
return true;
}
}
return false;
}
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/**
* @title Governance
* @author Ferit Tunçer - <[email protected]>
* This contract implements the governance mechanism of Kleros Athena release.
* Bug Bounties: This code hasn't undertaken a bug bounty program yet.
*/
pragma solidity ^0.4.24;
import "kleros-interaction/contracts/standard/permission/ArbitrablePermissionList.sol";
import "kleros-interaction/contracts/standard/arbitration/CentralizedArbitrator.sol"; // I need this contract to be deployed for tests, Truffle issue.
import { ApproveAndCallFallBack, MiniMeToken, MiniMeTokenFactory, TokenController } from "minimetoken/contracts/MiniMeToken.sol";
import { MiniMeTokenERC20 as Pinakion } from "kleros-interaction/contracts/standard/arbitration/ArbitrableTokens/MiniMeTokenERC20.sol";
contract Governance is TokenController{
Pinakion public pinakion;
TokenController public tokenController;
ArbitrablePermissionList public proposalList;
uint public proposalQuorum;
uint public quorumDivideTime;
uint public lastTimeQuorumReached;
uint public votingTime;
uint public currentVotingTime;
address public constant SUPPORT_DEPOSIT = 0x707574546F566F74650000000000000000000000; // Address is a message in hex: putToVote - When this address reaches quorum proposal gets put to vote.
address public constant APPROVAL_DEPOSIT = 0x617070726f76616c000000000000000000000000; // Address is a message in hex: approval - This address represents yes votes.
address public constant REJECTION_DEPOSIT = 0x72656a656374696F6E0000000000000000000000; // Address is a message in hex: rejection - This address represents no votes.
enum ProposalState {
New,
PutToSupport,
PutToVote,
Decided,
Executed
}
struct Proposal {
address destination; // The governed contract.
uint amount; // The amount of ETH to send (in most cases it should be 0).
bytes data; // The data (similar to a multisig mechanism).
string descriptionURI; // URI to a natural language description of the proposal. Also used as ID in mappings.
bytes32 descriptionHash; // Hash of the description.
string argumentsURI; // URI to arguments for the proposal.
bytes32 argumentsHash; // Hash of the arguments.
ProposalState state; // State of proposal.
uint whenPutToVote; // Records the time when a proposal put to vote to be able to calculate voting period.
MiniMeToken quorumToken; // The token that will be used for quorum.
MiniMeToken voteToken; // The token that will be used for actual proposal voting.
bool approved; // Outcome of voting.
}
mapping(bytes32 => Proposal) public proposals;
mapping(bytes32 => uint) public quorumRequirement; // The quorum requirement that is constant during a proposals lifecycle.
constructor (uint _proposalQuorum, uint _quorumDivideTime, uint _votingTime, ArbitrablePermissionList _arbitrablePermissionList, Pinakion _pinakion, TokenController _tokenController) public {
lastTimeQuorumReached = block.timestamp;
proposalList = _arbitrablePermissionList;
pinakion = _pinakion;
tokenController = _tokenController;
proposalQuorum = _proposalQuorum;
quorumDivideTime = _quorumDivideTime;
votingTime = _votingTime;
}
// ****************************** //
// * Modifiers * //
// ****************************** //
modifier onlyWhenProposalIsNew(bytes32 _id) {
require(proposals[_id].state == ProposalState.New, "Proposal must be in New state.");
_;
}
modifier onlyWhenProposalPutToSupport(bytes32 _id) {
require(proposals[_id].state == ProposalState.PutToSupport, "Proposal must be in PutToSupport state.");
_;
}
// ****************************** //
// * Events * //
// ****************************** //
event ProposalCreated(bytes32 indexed _id, address _destination);
event ProposalRequestedToRegister(bytes32 indexed _id);
event ProposalPutToSupport(bytes32 indexed _id);
event ProposalPutToVote(bytes32 indexed _id);
event ProposalDecided(bytes32 indexed _id, bool _approved);
event ProposalExecuted(bytes32 indexed _id);
// ****************************** //
// * Governance Mechanism * //
// ****************************** //
/** @dev Creates a proposal and requests registering to proposalList.
* @param _id ID of the proposalList.
* @param _destination Destination contract of the execution.
* @param _amount Value of the execution.
* @param _data Data of the execution.
* @param _descriptionURI URI of the description of the proposal.
* @param _descriptionHash Hash of the description content.
* @param _argumentsURI URI of the arguments of the proposal.
* @param _argumentsHash Hash of the arguments content.
*/
function createAndRegisterProposal(bytes32 _id, address _destination, uint _amount, bytes _data, string _descriptionURI, bytes32 _descriptionHash, string _argumentsURI, bytes32 _argumentsHash) public payable onlyWhenProposalIsNew(_id) {
require(proposals[_id].destination == address(0), "There must not a proposal with given id already.");
proposals[_id].destination = _destination;
proposals[_id].amount = _amount;
proposals[_id].data = _data;
proposals[_id].descriptionURI = _descriptionURI;
proposals[_id].descriptionHash = _descriptionHash;
proposals[_id].argumentsURI = _argumentsURI;
proposals[_id].argumentsHash = _argumentsHash;
quorumRequirement[_id] = proposalQuorum;
emit ProposalCreated(_id, _destination);
proposalList.requestRegistration.value(msg.value)(_id);
emit ProposalRequestedToRegister(_id);
}
/** @dev Put proposal to support voting only when a new proposal is permitted.
* @param _id ID of a proposal.
*/
function putProposalToSupport(bytes32 _id) public onlyWhenProposalIsNew(_id) {
require(proposalList.isPermitted(_id), "Proposal must be permitted in the proposal list.");
Proposal storage proposal = proposals[_id];
address cloneToken = pinakion.createCloneToken({_cloneTokenName: "Quorum Token", _cloneDecimalUnits: pinakion.decimals(), _cloneTokenSymbol: "QUORUM", _snapshotBlock: block.number, _transfersEnabled: true});
proposal.quorumToken = MiniMeToken(cloneToken);
proposal.state = ProposalState.PutToSupport;
emit ProposalPutToSupport(_id);
}
/** @dev Calculate and return required quorum for a given proposal.
* @param _id ID of a proposal.
*/
function getRequiredQuorum(bytes32 _id) public view onlyWhenProposalPutToSupport(_id) returns (uint effectiveQuorum){
uint numberOfDividePeriodsPassed = (block.timestamp - lastTimeQuorumReached) / quorumDivideTime;
effectiveQuorum = quorumRequirement[_id] * proposals[_id].quorumToken.totalSupply() / (2 ** numberOfDividePeriodsPassed) / 100;
}
/** @dev Put given proposal to vote.
* @param _id ID of a proposal.
*/
function putProposalToVote(bytes32 _id) public onlyWhenProposalPutToSupport(_id) {
require(proposals[_id].quorumToken.balanceOf(SUPPORT_DEPOSIT) >= getRequiredQuorum(_id), "Proposal must to have quorum.");
Proposal storage proposal = proposals[_id];
proposal.whenPutToVote = block.timestamp;
address cloneToken = pinakion.createCloneToken({_cloneTokenName: "Vote Token", _cloneDecimalUnits: pinakion.decimals(), _cloneTokenSymbol: "VOTE", _snapshotBlock: block.number, _transfersEnabled: true});
proposal.voteToken = MiniMeToken(cloneToken);
proposal.state = ProposalState.PutToVote;
emit ProposalPutToVote(_id);
lastTimeQuorumReached = block.timestamp; // Necessary when calculating required quorum as it is halved periodically.
currentVotingTime = votingTime; // Update allowed voting time, which will be constant during new quorum phase.
}
/** @dev Ends a voting, moves proposal to decided state, sets the decision.
* @param _id ID of a proposal.
*/
function finalizeVoting(bytes32 _id) public {
require(proposals[_id].state == ProposalState.PutToVote, "Proposal must be in PutToVote state");
require(now - proposals[_id].whenPutToVote >= currentVotingTime, "Voting period must be ended.");
proposals[_id].state = ProposalState.Decided;
proposals[_id].approved = proposals[_id].voteToken.balanceOf(APPROVAL_DEPOSIT) > proposals[_id].voteToken.balanceOf(REJECTION_DEPOSIT);
emit ProposalDecided(_id, proposals[_id].approved);
}
/** @dev General purpose call function for executing a proposal UNTRUSTED.
* @param _id ID of a proposal.
*/
function executeProposal(bytes32 _id) public {
Proposal storage proposal = proposals[_id];
require(proposal.state == ProposalState.Decided, "Proposal must be in Decided state.");
require(proposal.approved, "Proposal must be approved.");
require(proposal.destination == address(this), "Destination unknown");
//this.call.value(0)()
require(proposal.destination.call.value(proposal.amount)(proposal.data), "Proposal execution failed!"); // solium-disable-line security/no-call-value
proposal.state = ProposalState.Executed;
emit ProposalExecuted(_id);
}
// ***************** //
// * Setters * //
// ***************** //
/** @dev Setter for proposalQuorum.
* @param _proposalQuorum Value to be set.
*/
function setProposalQuorum(uint _proposalQuorum) internal {
proposalQuorum = _proposalQuorum;
}
/** @dev Setter for votingTime.
* @param _votingTime Value to be set.
*/
function setVotingTime(uint _votingTime) {
require(msg.sender == address(this));
votingTime = _votingTime;
}
/** @dev Setter for quorumDivideTime.
* @param _quorumDivideTime Value to be set.
*/
function setQuorumDivideTime(uint _quorumDivideTime) internal {
quorumDivideTime = _quorumDivideTime;
}
// ************************** //
// * Token Controller * //
// ************************** //
/// @notice Called when `_owner` sends ether to the MiniMe Token contract.
/// @param _owner The address that sent the ether to create tokens.
/// @return True if the ether is accepted, false if it throws.
function proxyPayment(address _owner) public payable returns(bool){
return true;
}
/// @notice Notifies the controller about a token transfer allowing the controller to react if desired.
/// @param _from The origin of the transfer.
/// @param _to The destination of the transfer.
/// @param _amount The amount of the transfer.
/// @return False if the controller does not authorize the transfer.
function onTransfer(address _from, address _to, uint _amount) public returns(bool){
return true;
}
/// @notice Notifies the controller about an approval allowing the controller to react if desired.
/// @param _owner The address that calls `approve()`.
/// @param _spender The spender in the `approve()` call.
/// @param _amount The amount in the `approve()` call.
/// @return False if the controller does not authorize the approval.
function onApprove(address _owner, address _spender, uint _amount) public returns(bool){
return true;
}
}
| Necessary when calculating required quorum as it is halved periodically.
| lastTimeQuorumReached = block.timestamp; | 2,486,250 | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
pragma solidity >=0.5.0;
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
pragma solidity >=0.5.0;
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./IncentiveDistribution.sol";
import "./RoleAware.sol";
import "./Fund.sol";
import "./CrossMarginTrading.sol";
/**
@title Here we support staking for MFI incentives as well as
staking to perform the maintenance role.
*/
contract Admin is RoleAware {
/// Margenswap (MFI) token address
address public immutable MFI;
mapping(address => uint256) public stakes;
uint256 public totalStakes;
uint256 public constant mfiStakeTranche = 1;
uint256 public maintenanceStakePerBlock = 15 ether;
mapping(address => address) public nextMaintenanceStaker;
mapping(address => mapping(address => bool)) public maintenanceDelegateTo;
address public currentMaintenanceStaker;
address public prevMaintenanceStaker;
uint256 public currentMaintenanceStakerStartBlock;
address public immutable lockedMFI;
constructor(
address _MFI,
address _lockedMFI,
address lockedMFIDelegate,
address _roles
) RoleAware(_roles) {
MFI = _MFI;
lockedMFI = _lockedMFI;
// for initialization purposes and to ensure availability of service
// the team's locked MFI participate in maintenance staking only
// (not in the incentive staking part)
// this implies some trust of the team to execute, which we deem reasonable
// since the locked stake is temporary and diminishing as well as the fact
// that the team is heavily invested in the protocol and incentivized
// by fees like any other maintainer
// furthermore others could step in to liquidate via the attacker route
// and take away the team fees if they were delinquent
nextMaintenanceStaker[_lockedMFI] = _lockedMFI;
currentMaintenanceStaker = _lockedMFI;
prevMaintenanceStaker = _lockedMFI;
maintenanceDelegateTo[_lockedMFI][lockedMFIDelegate];
currentMaintenanceStakerStartBlock = block.number;
}
/// Maintence stake setter
function setMaintenanceStakePerBlock(uint256 amount)
external
onlyOwnerExec
{
maintenanceStakePerBlock = amount;
}
function _stake(address holder, uint256 amount) internal {
Fund(fund()).depositFor(holder, MFI, amount);
stakes[holder] += amount;
totalStakes += amount;
IncentiveDistribution(incentiveDistributor()).addToClaimAmount(
mfiStakeTranche,
holder,
amount
);
}
/// Deposit a stake for sender
function depositStake(uint256 amount) external {
_stake(msg.sender, amount);
}
function _withdrawStake(
address holder,
uint256 amount,
address recipient
) internal {
// overflow failure desirable
stakes[holder] -= amount;
totalStakes -= amount;
Fund(fund()).withdraw(MFI, recipient, amount);
IncentiveDistribution(incentiveDistributor()).subtractFromClaimAmount(
mfiStakeTranche,
holder,
amount
);
}
/// Withdraw stake for sender
function withdrawStake(uint256 amount) external {
require(
!isAuthorizedStaker(msg.sender),
"You can't withdraw while you're authorized staker"
);
_withdrawStake(msg.sender, amount, msg.sender);
}
/// Deposit maintenance stake
function depositMaintenanceStake(uint256 amount) external {
require(
amount + stakes[msg.sender] >= maintenanceStakePerBlock,
"Insufficient stake to call even one block"
);
_stake(msg.sender, amount);
if (nextMaintenanceStaker[msg.sender] == address(0)) {
nextMaintenanceStaker[msg.sender] = getUpdatedCurrentStaker();
nextMaintenanceStaker[prevMaintenanceStaker] = msg.sender;
}
}
function getMaintenanceStakerStake(address staker)
public
view
returns (uint256)
{
if (staker == lockedMFI) {
return IERC20(MFI).balanceOf(lockedMFI) / 2;
} else {
return stakes[staker];
}
}
function getUpdatedCurrentStaker() public returns (address) {
uint256 currentStake =
getMaintenanceStakerStake(currentMaintenanceStaker);
while (
(block.number - currentMaintenanceStakerStartBlock) *
maintenanceStakePerBlock >=
currentStake
) {
if (maintenanceStakePerBlock > currentStake) {
// delete current from daisy chain
address nextOne =
nextMaintenanceStaker[currentMaintenanceStaker];
nextMaintenanceStaker[prevMaintenanceStaker] = nextOne;
nextMaintenanceStaker[currentMaintenanceStaker] = address(0);
currentMaintenanceStaker = nextOne;
} else {
currentMaintenanceStakerStartBlock +=
currentStake /
maintenanceStakePerBlock;
prevMaintenanceStaker = currentMaintenanceStaker;
currentMaintenanceStaker = nextMaintenanceStaker[
currentMaintenanceStaker
];
}
currentStake = getMaintenanceStakerStake(currentMaintenanceStaker);
}
return currentMaintenanceStaker;
}
function viewCurrentMaintenanceStaker()
public
view
returns (address staker, uint256 startBlock)
{
staker = currentMaintenanceStaker;
uint256 currentStake = getMaintenanceStakerStake(staker);
startBlock = currentMaintenanceStakerStartBlock;
while (
(block.number - startBlock) * maintenanceStakePerBlock >=
currentStake
) {
if (currentStake >= maintenanceStakePerBlock) {
startBlock += currentStake / maintenanceStakePerBlock;
}
staker = nextMaintenanceStaker[staker];
currentStake = getMaintenanceStakerStake(staker);
}
}
/// Add a delegate for staker
function addDelegate(address forStaker, address delegate) external {
require(
msg.sender == forStaker ||
maintenanceDelegateTo[forStaker][msg.sender],
"msg.sender not authorized to delegate for staker"
);
maintenanceDelegateTo[forStaker][delegate] = true;
}
/// Remove a delegate for staker
function removeDelegate(address forStaker, address delegate) external {
require(
msg.sender == forStaker ||
maintenanceDelegateTo[forStaker][msg.sender],
"msg.sender not authorized to delegate for staker"
);
maintenanceDelegateTo[forStaker][delegate] = false;
}
function isAuthorizedStaker(address caller)
public
returns (bool isAuthorized)
{
address currentStaker = getUpdatedCurrentStaker();
isAuthorized =
currentStaker == caller ||
maintenanceDelegateTo[currentStaker][caller];
}
/// Penalize a staker
function penalizeMaintenanceStake(
address maintainer,
uint256 penalty,
address recipient
) external returns (uint256 stakeTaken) {
require(
isStakePenalizer(msg.sender),
"msg.sender not authorized to penalize stakers"
);
if (penalty > stakes[maintainer]) {
stakeTaken = stakes[maintainer];
} else {
stakeTaken = penalty;
}
_withdrawStake(maintainer, stakeTaken, recipient);
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "./RoleAware.sol";
/// @title Base lending behavior
abstract contract BaseLending {
uint256 constant FP32 = 2**32;
uint256 constant ACCUMULATOR_INIT = 10**18;
struct YieldAccumulator {
uint256 accumulatorFP;
uint256 lastUpdated;
uint256 hourlyYieldFP;
}
struct LendingMetadata {
uint256 totalLending;
uint256 totalBorrowed;
uint256 lendingBuffer;
uint256 lendingCap;
}
mapping(address => LendingMetadata) public lendingMeta;
/// @dev accumulate interest per issuer (like compound indices)
mapping(address => YieldAccumulator) public borrowYieldAccumulators;
uint256 public maxHourlyYieldFP;
uint256 public yieldChangePerSecondFP;
/// @dev simple formula for calculating interest relative to accumulator
function applyInterest(
uint256 balance,
uint256 accumulatorFP,
uint256 yieldQuotientFP
) internal pure returns (uint256) {
// 1 * FP / FP = 1
return (balance * accumulatorFP) / yieldQuotientFP;
}
/// update the yield for an asset based on recent supply and demand
function updatedYieldFP(
// previous yield
uint256 yieldFP,
// timestamp
uint256 lastUpdated,
uint256 totalLendingInBucket,
uint256 bucketTarget,
uint256 buyingSpeed,
uint256 withdrawingSpeed,
uint256 bucketMaxYield
) internal view returns (uint256) {
uint256 timeDiff = block.timestamp - lastUpdated;
uint256 yieldDiff = timeDiff * yieldChangePerSecondFP;
if (
totalLendingInBucket >= bucketTarget ||
buyingSpeed >= withdrawingSpeed
) {
yieldFP -= min(yieldFP, yieldDiff);
} else {
yieldFP += yieldDiff;
if (yieldFP > bucketMaxYield) {
yieldFP = bucketMaxYield;
}
}
return max(FP32, yieldFP);
}
function updateSpeed(
uint256 speed,
uint256 lastAction,
uint256 amount,
uint256 runtime
) internal view returns (uint256 newSpeed, uint256 newLastAction) {
uint256 timeDiff = block.timestamp - lastAction;
uint256 updateAmount = (amount * runtime) / (timeDiff + 1);
uint256 oldSpeedWeight = (runtime + 120 minutes) / 3;
uint256 updateWeight = timeDiff + 1;
// scale adjustment relative to runtime
newSpeed =
(speed * oldSpeedWeight + updateAmount * updateWeight) /
(oldSpeedWeight + updateWeight);
newLastAction = block.timestamp;
}
/// @dev minimum
function min(uint256 a, uint256 b) internal pure returns (uint256) {
if (a > b) {
return b;
} else {
return a;
}
}
/// @dev maximum
function max(uint256 a, uint256 b) internal pure returns (uint256) {
if (a > b) {
return a;
} else {
return b;
}
}
function _makeFallbackBond(
address issuer,
address holder,
uint256 amount
) internal virtual;
function lendingTarget(LendingMetadata storage meta)
internal
view
returns (uint256)
{
return min(meta.lendingCap, meta.totalBorrowed + meta.lendingBuffer);
}
/// View lending target
function viewLendingTarget(address issuer) external view returns (uint256) {
LendingMetadata storage meta = lendingMeta[issuer];
return lendingTarget(meta);
}
/// Available tokens to this issuance
function issuanceBalance(address issuance)
internal
view
virtual
returns (uint256);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "./Fund.sol";
import "../libraries/UniswapStyleLib.sol";
abstract contract BaseRouter {
modifier ensure(uint256 deadline) {
require(deadline >= block.timestamp, "Trade has expired");
_;
}
// **** SWAP ****
/// @dev requires the initial amount to have already been sent to the first pair
/// and for pairs to be vetted (which getAmountsIn / getAmountsOut do)
function _swap(
uint256[] memory amounts,
address[] memory pairs,
address[] memory tokens,
address _to
) internal {
for (uint256 i; i < pairs.length; i++) {
(address input, address output) = (tokens[i], tokens[i + 1]);
(address token0, ) = UniswapStyleLib.sortTokens(input, output);
uint256 amountOut = amounts[i + 1];
(uint256 amount0Out, uint256 amount1Out) =
input == token0
? (uint256(0), amountOut)
: (amountOut, uint256(0));
address to = i < pairs.length - 1 ? pairs[i + 1] : _to;
IUniswapV2Pair pair = IUniswapV2Pair(pairs[i]);
pair.swap(amount0Out, amount1Out, to, new bytes(0));
}
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "./BaseLending.sol";
struct Bond {
address holder;
address issuer;
uint256 originalPrice;
uint256 returnAmount;
uint256 maturityTimestamp;
uint256 runtime;
uint256 yieldFP;
}
/**
@title Lending for fixed runtime, fixed interest
Lenders can pick their own bond maturity date
@dev In order to manage interest rates for the different
maturities and create a yield curve we bucket
bond runtimes into weighted baskets and adjust
rates individually per bucket, based on supply and demand.
*/
abstract contract BondLending is BaseLending {
uint256 public minRuntime = 30 days;
uint256 public maxRuntime = 365 days;
uint256 public diffMaxMinRuntime = maxRuntime - minRuntime;
/**
@dev this is the numerator under runtimeWeights.
any excess left over is the weight of hourly bonds
*/
uint256 public constant WEIGHT_TOTAL_10k = 10_000;
struct BondBucketMetadata {
uint256 runtimeWeight;
uint256 buyingSpeed;
uint256 lastBought;
uint256 withdrawingSpeed;
uint256 lastWithdrawn;
uint256 yieldLastUpdated;
uint256 totalLending;
uint256 runtimeYieldFP;
}
mapping(uint256 => Bond) public bonds;
mapping(address => BondBucketMetadata[]) public bondBucketMetadata;
uint256 public nextBondIndex = 1;
event LiquidityWarning(
address indexed issuer,
address indexed holder,
uint256 value
);
function _makeBond(
address holder,
address issuer,
uint256 runtime,
uint256 amount,
uint256 minReturn
) internal returns (uint256 bondIndex) {
uint256 bucketIndex = getBucketIndex(issuer, runtime);
BondBucketMetadata storage bondMeta =
bondBucketMetadata[issuer][bucketIndex];
uint256 yieldFP = calcBondYieldFP(issuer, amount, runtime, bondMeta);
uint256 bondReturn = (yieldFP * amount) / FP32;
if (bondReturn >= minReturn) {
uint256 interpolatedAmount = (amount + bondReturn) / 2;
lendingMeta[issuer].totalLending += interpolatedAmount;
bondMeta.totalLending += interpolatedAmount;
bondIndex = nextBondIndex;
nextBondIndex++;
bonds[bondIndex] = Bond({
holder: holder,
issuer: issuer,
originalPrice: amount,
returnAmount: bondReturn,
maturityTimestamp: block.timestamp + runtime,
runtime: runtime,
yieldFP: yieldFP
});
(bondMeta.buyingSpeed, bondMeta.lastBought) = updateSpeed(
bondMeta.buyingSpeed,
bondMeta.lastBought,
amount,
runtime
);
}
}
function _withdrawBond(uint256 bondId, Bond storage bond)
internal
returns (uint256 withdrawAmount)
{
address issuer = bond.issuer;
uint256 bucketIndex = getBucketIndex(issuer, bond.runtime);
BondBucketMetadata storage bondMeta =
bondBucketMetadata[issuer][bucketIndex];
uint256 returnAmount = bond.returnAmount;
address holder = bond.holder;
uint256 interpolatedAmount = (bond.originalPrice + returnAmount) / 2;
LendingMetadata storage meta = lendingMeta[issuer];
meta.totalLending -= interpolatedAmount;
bondMeta.totalLending -= interpolatedAmount;
(bondMeta.withdrawingSpeed, bondMeta.lastWithdrawn) = updateSpeed(
bondMeta.withdrawingSpeed,
bondMeta.lastWithdrawn,
bond.originalPrice,
bond.runtime
);
delete bonds[bondId];
if (
meta.totalBorrowed > meta.totalLending ||
issuanceBalance(issuer) < returnAmount
) {
// apparently there is a liquidity issue
emit LiquidityWarning(issuer, holder, returnAmount);
_makeFallbackBond(issuer, holder, returnAmount);
} else {
withdrawAmount = returnAmount;
}
}
function calcBondYieldFP(
address issuer,
uint256 addedAmount,
uint256 runtime,
BondBucketMetadata storage bucketMeta
) internal view returns (uint256 yieldFP) {
uint256 totalLendingInBucket = addedAmount + bucketMeta.totalLending;
yieldFP = bucketMeta.runtimeYieldFP;
uint256 lastUpdated = bucketMeta.yieldLastUpdated;
LendingMetadata storage meta = lendingMeta[issuer];
uint256 bucketTarget =
(lendingTarget(meta) * bucketMeta.runtimeWeight) / WEIGHT_TOTAL_10k;
uint256 buying = bucketMeta.buyingSpeed;
uint256 withdrawing = bucketMeta.withdrawingSpeed;
YieldAccumulator storage borrowAccumulator =
borrowYieldAccumulators[issuer];
uint256 yieldGeneratedFP =
(borrowAccumulator.hourlyYieldFP * meta.totalBorrowed) /
(1 + meta.totalLending);
uint256 _maxHourlyYieldFP = min(maxHourlyYieldFP, yieldGeneratedFP);
uint256 bucketMaxYield = _maxHourlyYieldFP * (runtime / (1 hours));
yieldFP = updatedYieldFP(
yieldFP,
lastUpdated,
totalLendingInBucket,
bucketTarget,
buying,
withdrawing,
bucketMaxYield
);
}
/// Get view of returns on bond
function viewBondReturn(
address issuer,
uint256 runtime,
uint256 amount
) external view returns (uint256) {
uint256 bucketIndex = getBucketIndex(issuer, runtime);
uint256 yieldFP =
calcBondYieldFP(
issuer,
amount + bondBucketMetadata[issuer][bucketIndex].totalLending,
runtime,
bondBucketMetadata[issuer][bucketIndex]
);
return (yieldFP * amount) / FP32;
}
function getBucketIndex(address issuer, uint256 runtime)
internal
view
returns (uint256 bucketIndex)
{
uint256 bucketSize =
diffMaxMinRuntime / bondBucketMetadata[issuer].length;
bucketIndex = (runtime - minRuntime) / bucketSize;
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./Fund.sol";
import "./Lending.sol";
import "./RoleAware.sol";
import "./PriceAware.sol";
// Goal: all external functions only accessible to margintrader role
// except for view functions of course
struct CrossMarginAccount {
uint256 lastDepositBlock;
address[] borrowTokens;
// borrowed token address => amount
mapping(address => uint256) borrowed;
// borrowed token => yield quotient
mapping(address => uint256) borrowedYieldQuotientsFP;
address[] holdingTokens;
// token held in portfolio => amount
mapping(address => uint256) holdings;
// boolean value of whether an account holds a token
mapping(address => bool) holdsToken;
}
abstract contract CrossMarginAccounts is RoleAware, PriceAware {
/// @dev gets used in calculating how much accounts can borrow
uint256 public leveragePercent = 300;
/// @dev percentage of assets held per assets borrowed at which to liquidate
uint256 public liquidationThresholdPercent = 115;
/// @dev record of all cross margin accounts
mapping(address => CrossMarginAccount) internal marginAccounts;
/// @dev total token caps
mapping(address => uint256) public tokenCaps;
/// @dev tracks total of short positions per token
mapping(address => uint256) public totalShort;
/// @dev tracks total of long positions per token
mapping(address => uint256) public totalLong;
uint256 public coolingOffPeriod = 10;
/// @dev add an asset to be held by account
function addHolding(
CrossMarginAccount storage account,
address token,
uint256 depositAmount
) internal {
if (!hasHoldingToken(account, token)) {
account.holdingTokens.push(token);
account.holdsToken[token] = true;
}
account.holdings[token] += depositAmount;
}
/// @dev adjust account to reflect borrowing of token amount
function borrow(
CrossMarginAccount storage account,
address borrowToken,
uint256 borrowAmount
) internal {
if (!hasBorrowedToken(account, borrowToken)) {
account.borrowTokens.push(borrowToken);
account.borrowedYieldQuotientsFP[borrowToken] = Lending(lending())
.getUpdatedBorrowYieldAccuFP(borrowToken);
account.borrowed[borrowToken] = borrowAmount;
} else {
(uint256 oldBorrowed, uint256 accumulatorFP) =
Lending(lending()).applyBorrowInterest(
account.borrowed[borrowToken],
borrowToken,
account.borrowedYieldQuotientsFP[borrowToken]
);
account.borrowedYieldQuotientsFP[borrowToken] = accumulatorFP;
account.borrowed[borrowToken] = oldBorrowed + borrowAmount;
}
require(positiveBalance(account), "Insufficient balance");
}
/// @dev checks whether account is in the black, deposit + earnings relative to borrowed
function positiveBalance(CrossMarginAccount storage account)
internal
returns (bool)
{
uint256 loan = loanInPeg(account);
uint256 holdings = holdingsInPeg(account);
// The following condition should hold:
// holdings / loan >= leveragePercent / (leveragePercent - 100)
// =>
return holdings * (leveragePercent - 100) >= loan * leveragePercent;
}
/// @dev internal function adjusting holding and borrow balances when debt extinguished
function extinguishDebt(
CrossMarginAccount storage account,
address debtToken,
uint256 extinguishAmount
) internal {
// will throw if insufficient funds
(uint256 borrowAmount, uint256 newYieldQuot) =
Lending(lending()).applyBorrowInterest(
account.borrowed[debtToken],
debtToken,
account.borrowedYieldQuotientsFP[debtToken]
);
uint256 newBorrowAmount = borrowAmount - extinguishAmount;
account.borrowed[debtToken] = newBorrowAmount;
account.holdings[debtToken] =
account.holdings[debtToken] -
extinguishAmount;
if (newBorrowAmount > 0) {
account.borrowedYieldQuotientsFP[debtToken] = newYieldQuot;
} else {
delete account.borrowedYieldQuotientsFP[debtToken];
bool decrement = false;
uint256 len = account.borrowTokens.length;
for (uint256 i; len > i; i++) {
address currToken = account.borrowTokens[i];
if (currToken == debtToken) {
decrement = true;
} else if (decrement) {
account.borrowTokens[i - 1] = currToken;
}
}
account.borrowTokens.pop();
}
}
/// @dev checks whether an account holds a token
function hasHoldingToken(CrossMarginAccount storage account, address token)
internal
view
returns (bool)
{
return account.holdsToken[token];
}
/// @dev checks whether an account has borrowed a token
function hasBorrowedToken(CrossMarginAccount storage account, address token)
internal
view
returns (bool)
{
return account.borrowedYieldQuotientsFP[token] > 0;
}
/// @dev calculate total loan in reference currency, including compound interest
function loanInPeg(CrossMarginAccount storage account)
internal
returns (uint256)
{
return
sumTokensInPegWithYield(
account.borrowTokens,
account.borrowed,
account.borrowedYieldQuotientsFP
);
}
/// @dev total of assets of account, expressed in reference currency
function holdingsInPeg(CrossMarginAccount storage account)
internal
returns (uint256)
{
return sumTokensInPeg(account.holdingTokens, account.holdings);
}
/// @dev check whether an account can/should be liquidated
function belowMaintenanceThreshold(CrossMarginAccount storage account)
internal
returns (bool)
{
uint256 loan = loanInPeg(account);
uint256 holdings = holdingsInPeg(account);
// The following should hold:
// holdings / loan >= 1.1
// => holdings >= loan * 1.1
return 100 * holdings < liquidationThresholdPercent * loan;
}
/// @dev go through list of tokens and their amounts, summing up
function sumTokensInPeg(
address[] storage tokens,
mapping(address => uint256) storage amounts
) internal returns (uint256 totalPeg) {
uint256 len = tokens.length;
for (uint256 tokenId; tokenId < len; tokenId++) {
address token = tokens[tokenId];
totalPeg += PriceAware.getCurrentPriceInPeg(token, amounts[token]);
}
}
/// @dev go through list of tokens and their amounts, summing up
function viewTokensInPeg(
address[] storage tokens,
mapping(address => uint256) storage amounts
) internal view returns (uint256 totalPeg) {
uint256 len = tokens.length;
for (uint256 tokenId; tokenId < len; tokenId++) {
address token = tokens[tokenId];
totalPeg += PriceAware.viewCurrentPriceInPeg(token, amounts[token]);
}
}
/// @dev go through list of tokens and ammounts, summing up with interest
function sumTokensInPegWithYield(
address[] storage tokens,
mapping(address => uint256) storage amounts,
mapping(address => uint256) storage yieldQuotientsFP
) internal returns (uint256 totalPeg) {
uint256 len = tokens.length;
for (uint256 tokenId; tokenId < len; tokenId++) {
address token = tokens[tokenId];
totalPeg += yieldTokenInPeg(
token,
amounts[token],
yieldQuotientsFP
);
}
}
/// @dev go through list of tokens and ammounts, summing up with interest
function viewTokensInPegWithYield(
address[] storage tokens,
mapping(address => uint256) storage amounts,
mapping(address => uint256) storage yieldQuotientsFP
) internal view returns (uint256 totalPeg) {
uint256 len = tokens.length;
for (uint256 tokenId; tokenId < len; tokenId++) {
address token = tokens[tokenId];
totalPeg += viewYieldTokenInPeg(
token,
amounts[token],
yieldQuotientsFP
);
}
}
/// @dev calculate yield for token amount and convert to reference currency
function yieldTokenInPeg(
address token,
uint256 amount,
mapping(address => uint256) storage yieldQuotientsFP
) internal returns (uint256) {
uint256 yieldFP =
Lending(lending()).viewAccumulatedBorrowingYieldFP(token);
// 1 * FP / FP = 1
uint256 amountInToken = (amount * yieldFP) / yieldQuotientsFP[token];
return PriceAware.getCurrentPriceInPeg(token, amountInToken);
}
/// @dev calculate yield for token amount and convert to reference currency
function viewYieldTokenInPeg(
address token,
uint256 amount,
mapping(address => uint256) storage yieldQuotientsFP
) internal view returns (uint256) {
uint256 yieldFP =
Lending(lending()).viewAccumulatedBorrowingYieldFP(token);
// 1 * FP / FP = 1
uint256 amountInToken = (amount * yieldFP) / yieldQuotientsFP[token];
return PriceAware.viewCurrentPriceInPeg(token, amountInToken);
}
/// @dev move tokens from one holding to another
function adjustAmounts(
CrossMarginAccount storage account,
address fromToken,
address toToken,
uint256 soldAmount,
uint256 boughtAmount
) internal {
account.holdings[fromToken] = account.holdings[fromToken] - soldAmount;
addHolding(account, toToken, boughtAmount);
}
/// sets borrow and holding to zero
function deleteAccount(CrossMarginAccount storage account) internal {
uint256 len = account.borrowTokens.length;
for (uint256 borrowIdx; len > borrowIdx; borrowIdx++) {
address borrowToken = account.borrowTokens[borrowIdx];
totalShort[borrowToken] -= account.borrowed[borrowToken];
account.borrowed[borrowToken] = 0;
account.borrowedYieldQuotientsFP[borrowToken] = 0;
}
len = account.holdingTokens.length;
for (uint256 holdingIdx; len > holdingIdx; holdingIdx++) {
address holdingToken = account.holdingTokens[holdingIdx];
totalLong[holdingToken] -= account.holdings[holdingToken];
account.holdings[holdingToken] = 0;
account.holdsToken[holdingToken] = false;
}
delete account.borrowTokens;
delete account.holdingTokens;
}
/// @dev minimum
function min(uint256 a, uint256 b) internal pure returns (uint256) {
if (a > b) {
return b;
} else {
return a;
}
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "./CrossMarginAccounts.sol";
/**
@title Handles liquidation of accounts below maintenance threshold
@notice Liquidation can be called by the authorized staker,
as determined in the Admin contract.
If the authorized staker is delinquent, other participants can jump
in and attack, taking their fees and potentially even their stake,
depending how delinquent the responsible authorized staker is.
*/
abstract contract CrossMarginLiquidation is CrossMarginAccounts {
event LiquidationShortfall(uint256 amount);
event AccountLiquidated(address account);
struct Liquidation {
uint256 buy;
uint256 sell;
uint256 blockNum;
}
/// record kept around until a stake attacker can claim their reward
struct AccountLiqRecord {
uint256 blockNum;
address loser;
uint256 amount;
address stakeAttacker;
}
mapping(address => Liquidation) liquidationAmounts;
address[] internal sellTokens;
address[] internal buyTokens;
address[] internal tradersToLiquidate;
mapping(address => uint256) public maintenanceFailures;
mapping(address => AccountLiqRecord) public stakeAttackRecords;
uint256 public avgLiquidationPerCall = 10;
uint256 public liqStakeAttackWindow = 5;
uint256 public MAINTAINER_CUT_PERCENT = 5;
uint256 public failureThreshold = 10;
/// Set failure threshold
function setFailureThreshold(uint256 threshFactor) external onlyOwnerExec {
failureThreshold = threshFactor;
}
/// Set liquidity stake attack window
function setLiqStakeAttackWindow(uint256 window) external onlyOwnerExec {
liqStakeAttackWindow = window;
}
/// Set maintainer's percent cut
function setMaintainerCutPercent(uint256 cut) external onlyOwnerExec {
MAINTAINER_CUT_PERCENT = cut;
}
/// @dev calcLiquidationAmounts does a number of tasks in this contract
/// and some of them are not straightforward.
/// First of all it aggregates liquidation amounts,
/// as well as which traders are ripe for liquidation, in storage (not in memory)
/// owing to the fact that arrays can't be pushed to and hash maps don't
/// exist in memory.
/// Then it also returns any stake attack funds if the stake was unsuccessful
/// (i.e. current caller is authorized). Also see context below.
function calcLiquidationAmounts(
address[] memory liquidationCandidates,
bool isAuthorized
) internal returns (uint256 attackReturns) {
sellTokens = new address[](0);
buyTokens = new address[](0);
tradersToLiquidate = new address[](0);
for (
uint256 traderIndex = 0;
liquidationCandidates.length > traderIndex;
traderIndex++
) {
address traderAddress = liquidationCandidates[traderIndex];
CrossMarginAccount storage account = marginAccounts[traderAddress];
if (belowMaintenanceThreshold(account)) {
tradersToLiquidate.push(traderAddress);
uint256 len = account.holdingTokens.length;
for (uint256 sellIdx = 0; len > sellIdx; sellIdx++) {
address token = account.holdingTokens[sellIdx];
Liquidation storage liquidation = liquidationAmounts[token];
if (liquidation.blockNum != block.number) {
liquidation.sell = account.holdings[token];
liquidation.buy = 0;
liquidation.blockNum = block.number;
sellTokens.push(token);
} else {
liquidation.sell += account.holdings[token];
}
}
len = account.borrowTokens.length;
for (uint256 buyIdx = 0; len > buyIdx; buyIdx++) {
address token = account.borrowTokens[buyIdx];
Liquidation storage liquidation = liquidationAmounts[token];
(uint256 loanAmount, ) =
Lending(lending()).applyBorrowInterest(
account.borrowed[token],
token,
account.borrowedYieldQuotientsFP[token]
);
Lending(lending()).payOff(token, loanAmount);
if (liquidation.blockNum != block.number) {
liquidation.sell = 0;
liquidation.buy = loanAmount;
liquidation.blockNum = block.number;
buyTokens.push(token);
} else {
liquidation.buy += loanAmount;
}
}
}
AccountLiqRecord storage liqAttackRecord =
stakeAttackRecords[traderAddress];
if (isAuthorized) {
attackReturns += _disburseLiqAttack(liqAttackRecord);
}
}
}
function _disburseLiqAttack(AccountLiqRecord storage liqAttackRecord)
internal
returns (uint256 returnAmount)
{
if (liqAttackRecord.amount > 0) {
// validate attack records, if any
uint256 blockDiff =
min(
block.number - liqAttackRecord.blockNum,
liqStakeAttackWindow
);
uint256 attackerCut =
(liqAttackRecord.amount * blockDiff) / liqStakeAttackWindow;
Fund(fund()).withdraw(
PriceAware.peg,
liqAttackRecord.stakeAttacker,
attackerCut
);
Admin a = Admin(admin());
uint256 penalty =
(a.maintenanceStakePerBlock() * attackerCut) /
avgLiquidationPerCall;
a.penalizeMaintenanceStake(
liqAttackRecord.loser,
penalty,
liqAttackRecord.stakeAttacker
);
// return remainder, after cut was taken to authorized stakekr
returnAmount = liqAttackRecord.amount - attackerCut;
}
}
/// Disburse liquidity stake attacks
function disburseLiqStakeAttacks(address[] memory liquidatedAccounts)
external
{
for (uint256 i = 0; liquidatedAccounts.length > i; i++) {
address liqAccount = liquidatedAccounts[i];
AccountLiqRecord storage liqAttackRecord =
stakeAttackRecords[liqAccount];
if (
block.number > liqAttackRecord.blockNum + liqStakeAttackWindow
) {
_disburseLiqAttack(liqAttackRecord);
delete stakeAttackRecords[liqAccount];
}
}
}
function liquidateFromPeg() internal returns (uint256 pegAmount) {
uint256 len = buyTokens.length;
for (uint256 tokenIdx = 0; len > tokenIdx; tokenIdx++) {
address buyToken = buyTokens[tokenIdx];
Liquidation storage liq = liquidationAmounts[buyToken];
if (liq.buy > liq.sell) {
pegAmount += PriceAware.liquidateFromPeg(
buyToken,
liq.buy - liq.sell
);
delete liquidationAmounts[buyToken];
}
}
delete buyTokens;
}
function liquidateToPeg() internal returns (uint256 pegAmount) {
uint256 len = sellTokens.length;
for (uint256 tokenIndex = 0; len > tokenIndex; tokenIndex++) {
address token = sellTokens[tokenIndex];
Liquidation storage liq = liquidationAmounts[token];
if (liq.sell > liq.buy) {
uint256 sellAmount = liq.sell - liq.buy;
pegAmount += PriceAware.liquidateToPeg(token, sellAmount);
delete liquidationAmounts[token];
}
}
delete sellTokens;
}
function maintainerIsFailing() internal view returns (bool) {
(address currentMaintainer, ) =
Admin(admin()).viewCurrentMaintenanceStaker();
return
maintenanceFailures[currentMaintainer] >
failureThreshold * avgLiquidationPerCall;
}
/// called by maintenance stakers to liquidate accounts below liquidation threshold
function liquidate(address[] memory liquidationCandidates)
external
noIntermediary
returns (uint256 maintainerCut)
{
bool isAuthorized = Admin(admin()).isAuthorizedStaker(msg.sender);
bool canTakeNow = isAuthorized || maintainerIsFailing();
// calcLiquidationAmounts does a lot of the work here
// * aggregates both sell and buy side targets to be liquidated
// * returns attacker cuts to them
// * aggregates any returned fees from unauthorized (attacking) attempts
maintainerCut = calcLiquidationAmounts(
liquidationCandidates,
isAuthorized
);
uint256 sale2pegAmount = liquidateToPeg();
uint256 peg2targetCost = liquidateFromPeg();
// this may be a bit imprecise, since individual shortfalls may be obscured
// by overall returns and the maintainer cut is taken out of the net total,
// but it gives us the general picture
uint256 costWithCut =
(peg2targetCost * (100 + MAINTAINER_CUT_PERCENT)) / 100;
if (costWithCut > sale2pegAmount) {
emit LiquidationShortfall(costWithCut - sale2pegAmount);
}
address loser = address(0);
if (!canTakeNow) {
// whoever is the current responsible maintenance staker
// and liable to lose their stake
loser = Admin(admin()).getUpdatedCurrentStaker();
}
// iterate over traders and send back their money
// as well as giving attackers their due, in case caller isn't authorized
for (
uint256 traderIdx = 0;
tradersToLiquidate.length > traderIdx;
traderIdx++
) {
address traderAddress = tradersToLiquidate[traderIdx];
CrossMarginAccount storage account = marginAccounts[traderAddress];
uint256 holdingsValue = holdingsInPeg(account);
uint256 borrowValue = loanInPeg(account);
// 5% of value borrowed
uint256 maintainerCut4Account =
(borrowValue * MAINTAINER_CUT_PERCENT) / 100;
maintainerCut += maintainerCut4Account;
if (!canTakeNow) {
// This could theoretically lead to a previous attackers
// record being overwritten, but only if the trader restarts
// their account and goes back into the red within the short time window
// which would be a costly attack requiring collusion without upside
AccountLiqRecord storage liqAttackRecord =
stakeAttackRecords[traderAddress];
liqAttackRecord.amount = maintainerCut4Account;
liqAttackRecord.stakeAttacker = msg.sender;
liqAttackRecord.blockNum = block.number;
liqAttackRecord.loser = loser;
}
// send back trader money
if (holdingsValue > maintainerCut4Account + borrowValue) {
// send remaining funds back to trader
Fund(fund()).withdraw(
PriceAware.peg,
traderAddress,
holdingsValue - borrowValue - maintainerCut4Account
);
}
emit AccountLiquidated(traderAddress);
deleteAccount(account);
}
avgLiquidationPerCall =
(avgLiquidationPerCall * 99 + maintainerCut) /
100;
if (canTakeNow) {
Fund(fund()).withdraw(PriceAware.peg, msg.sender, maintainerCut);
}
address currentMaintainer = Admin(admin()).getUpdatedCurrentStaker();
if (isAuthorized) {
if (maintenanceFailures[currentMaintainer] > maintainerCut) {
maintenanceFailures[currentMaintainer] -= maintainerCut;
} else {
maintenanceFailures[currentMaintainer] = 0;
}
} else {
maintenanceFailures[currentMaintainer] += maintainerCut;
}
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./Fund.sol";
import "./Lending.sol";
import "./RoleAware.sol";
import "./CrossMarginLiquidation.sol";
// Goal: all external functions only accessible to margintrader role
// except for view functions of course
contract CrossMarginTrading is CrossMarginLiquidation, IMarginTrading {
constructor(address _peg, address _roles)
RoleAware(_roles)
PriceAware(_peg)
{}
/// @dev admin function to set the token cap
function setTokenCap(address token, uint256 cap)
external
onlyOwnerExecActivator
{
tokenCaps[token] = cap;
}
/// @dev setter for cooling off period for withdrawing funds after deposit
function setCoolingOffPeriod(uint256 blocks) external onlyOwnerExec {
coolingOffPeriod = blocks;
}
/// @dev admin function to set leverage
function setLeveragePercent(uint256 _leveragePercent)
external
onlyOwnerExec
{
leveragePercent = _leveragePercent;
}
/// @dev admin function to set liquidation threshold
function setLiquidationThresholdPercent(uint256 threshold)
external
onlyOwnerExec
{
liquidationThresholdPercent = threshold;
}
/// @dev gets called by router to affirm a deposit to an account
function registerDeposit(
address trader,
address token,
uint256 depositAmount
) external override returns (uint256 extinguishableDebt) {
require(isMarginTrader(msg.sender), "Calling contr. not authorized");
CrossMarginAccount storage account = marginAccounts[trader];
account.lastDepositBlock = block.number;
if (account.borrowed[token] > 0) {
extinguishableDebt = min(depositAmount, account.borrowed[token]);
extinguishDebt(account, token, extinguishableDebt);
totalShort[token] -= extinguishableDebt;
}
// no overflow because depositAmount >= extinguishableDebt
uint256 addedHolding = depositAmount - extinguishableDebt;
_registerDeposit(account, token, addedHolding);
}
function _registerDeposit(
CrossMarginAccount storage account,
address token,
uint256 addedHolding
) internal {
addHolding(account, token, addedHolding);
totalLong[token] += addedHolding;
require(
tokenCaps[token] >= totalLong[token],
"Exceeds global token cap"
);
}
/// @dev gets called by router to affirm borrowing event
function registerBorrow(
address trader,
address borrowToken,
uint256 borrowAmount
) external override {
require(isMarginTrader(msg.sender), "Calling contr. not authorized");
CrossMarginAccount storage account = marginAccounts[trader];
addHolding(account, borrowToken, borrowAmount);
_registerBorrow(account, borrowToken, borrowAmount);
}
function _registerBorrow(
CrossMarginAccount storage account,
address borrowToken,
uint256 borrowAmount
) internal {
totalShort[borrowToken] += borrowAmount;
totalLong[borrowToken] += borrowAmount;
require(
tokenCaps[borrowToken] >= totalShort[borrowToken] &&
tokenCaps[borrowToken] >= totalLong[borrowToken],
"Exceeds global token cap"
);
borrow(account, borrowToken, borrowAmount);
}
/// @dev gets called by router to affirm withdrawal of tokens from account
function registerWithdrawal(
address trader,
address withdrawToken,
uint256 withdrawAmount
) external override {
require(isMarginTrader(msg.sender), "Calling contr not authorized");
CrossMarginAccount storage account = marginAccounts[trader];
_registerWithdrawal(account, withdrawToken, withdrawAmount);
}
function _registerWithdrawal(
CrossMarginAccount storage account,
address withdrawToken,
uint256 withdrawAmount
) internal {
require(
block.number > account.lastDepositBlock + coolingOffPeriod,
"No withdrawal soon after deposit"
);
totalLong[withdrawToken] -= withdrawAmount;
// throws on underflow
account.holdings[withdrawToken] =
account.holdings[withdrawToken] -
withdrawAmount;
require(positiveBalance(account), "Insufficient balance");
}
/// @dev overcollateralized borrowing on a cross margin account, called by router
function registerOvercollateralizedBorrow(
address trader,
address depositToken,
uint256 depositAmount,
address borrowToken,
uint256 withdrawAmount
) external override {
require(isMarginTrader(msg.sender), "Calling contr. not authorized");
CrossMarginAccount storage account = marginAccounts[trader];
_registerDeposit(account, depositToken, depositAmount);
_registerBorrow(account, borrowToken, withdrawAmount);
_registerWithdrawal(account, borrowToken, withdrawAmount);
account.lastDepositBlock = block.number;
}
/// @dev gets called by router to register a trade and borrow and extinguish as necessary
function registerTradeAndBorrow(
address trader,
address tokenFrom,
address tokenTo,
uint256 inAmount,
uint256 outAmount
)
external
override
returns (uint256 extinguishableDebt, uint256 borrowAmount)
{
require(isMarginTrader(msg.sender), "Calling contr. not an authorized");
CrossMarginAccount storage account = marginAccounts[trader];
if (account.borrowed[tokenTo] > 0) {
extinguishableDebt = min(outAmount, account.borrowed[tokenTo]);
extinguishDebt(account, tokenTo, extinguishableDebt);
totalShort[tokenTo] -= extinguishableDebt;
}
uint256 sellAmount = inAmount;
uint256 fromHoldings = account.holdings[tokenFrom];
if (inAmount > fromHoldings) {
sellAmount = fromHoldings;
/// won't overflow
borrowAmount = inAmount - sellAmount;
}
if (inAmount > borrowAmount) {
totalLong[tokenFrom] -= inAmount - borrowAmount;
}
if (outAmount > extinguishableDebt) {
totalLong[tokenTo] += outAmount - extinguishableDebt;
}
require(
tokenCaps[tokenTo] >= totalLong[tokenTo],
"Exceeds global token cap"
);
adjustAmounts(
account,
tokenFrom,
tokenTo,
sellAmount,
outAmount - extinguishableDebt
);
if (borrowAmount > 0) {
totalShort[tokenFrom] += borrowAmount;
require(
tokenCaps[tokenFrom] >= totalShort[tokenFrom],
"Exceeds global token cap"
);
borrow(account, tokenFrom, borrowAmount);
}
}
/// @dev can get called by router to register the dissolution of an account
function registerLiquidation(address trader) external override {
require(isMarginTrader(msg.sender), "Calling contr. not authorized");
CrossMarginAccount storage account = marginAccounts[trader];
require(loanInPeg(account) == 0, "Can't liquidate: borrowing");
deleteAccount(account);
}
/// @dev currently holding in this token
function viewBalanceInToken(address trader, address token)
external
view
returns (uint256)
{
CrossMarginAccount storage account = marginAccounts[trader];
return account.holdings[token];
}
/// @dev view function to display account held assets state
function getHoldingAmounts(address trader)
external
view
override
returns (
address[] memory holdingTokens,
uint256[] memory holdingAmounts
)
{
CrossMarginAccount storage account = marginAccounts[trader];
holdingTokens = account.holdingTokens;
holdingAmounts = new uint256[](account.holdingTokens.length);
for (uint256 idx = 0; holdingTokens.length > idx; idx++) {
address tokenAddress = holdingTokens[idx];
holdingAmounts[idx] = account.holdings[tokenAddress];
}
}
/// @dev view function to display account borrowing state
function getBorrowAmounts(address trader)
external
view
override
returns (address[] memory borrowTokens, uint256[] memory borrowAmounts)
{
CrossMarginAccount storage account = marginAccounts[trader];
borrowTokens = account.borrowTokens;
borrowAmounts = new uint256[](account.borrowTokens.length);
for (uint256 idx = 0; borrowTokens.length > idx; idx++) {
address tokenAddress = borrowTokens[idx];
borrowAmounts[idx] = Lending(lending()).viewWithBorrowInterest(
account.borrowed[tokenAddress],
tokenAddress,
account.borrowedYieldQuotientsFP[tokenAddress]
);
}
}
/// @dev view function to get loan amount in peg
function viewLoanInPeg(address trader)
external
view
returns (uint256 amount)
{
CrossMarginAccount storage account = marginAccounts[trader];
return
viewTokensInPegWithYield(
account.borrowTokens,
account.borrowed,
account.borrowedYieldQuotientsFP
);
}
/// @dev total of assets of account, expressed in reference currency
function viewHoldingsInPeg(address trader) external view returns (uint256) {
CrossMarginAccount storage account = marginAccounts[trader];
return viewTokensInPeg(account.holdingTokens, account.holdings);
}
/// @dev can this trader be liquidated?
function canBeLiquidated(address trader) external view returns (bool) {
CrossMarginAccount storage account = marginAccounts[trader];
uint256 loan =
viewTokensInPegWithYield(
account.borrowTokens,
account.borrowed,
account.borrowedYieldQuotientsFP
);
uint256 holdings =
viewTokensInPeg(account.holdingTokens, account.holdings);
return 100 * holdings >= liquidationThresholdPercent * loan;
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "../interfaces/IWETH.sol";
import "./RoleAware.sol";
/// @title Manage funding
contract Fund is RoleAware {
using SafeERC20 for IERC20;
/// wrapped ether
address public immutable WETH;
constructor(address _WETH, address _roles) RoleAware(_roles) {
WETH = _WETH;
}
/// Deposit an active token
function deposit(address depositToken, uint256 depositAmount) external {
IERC20(depositToken).safeTransferFrom(
msg.sender,
address(this),
depositAmount
);
}
/// Deposit token on behalf of `sender`
function depositFor(
address sender,
address depositToken,
uint256 depositAmount
) external {
require(isFundTransferer(msg.sender), "Unauthorized deposit");
IERC20(depositToken).safeTransferFrom(
sender,
address(this),
depositAmount
);
}
/// Deposit to wrapped ether
function depositToWETH() external payable {
IWETH(WETH).deposit{value: msg.value}();
}
// withdrawers role
function withdraw(
address withdrawalToken,
address recipient,
uint256 withdrawalAmount
) external {
require(isFundTransferer(msg.sender), "Unauthorized withdraw");
IERC20(withdrawalToken).safeTransfer(recipient, withdrawalAmount);
}
// withdrawers role
function withdrawETH(address recipient, uint256 withdrawalAmount) external {
require(isFundTransferer(msg.sender), "Unauthorized withdraw");
IWETH(WETH).withdraw(withdrawalAmount);
Address.sendValue(payable(recipient), withdrawalAmount);
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "./BaseLending.sol";
struct HourlyBond {
uint256 amount;
uint256 yieldQuotientFP;
uint256 moduloHour;
}
/// @title Here we offer subscriptions to auto-renewing hourly bonds
/// Funds are locked in for an 50 minutes per hour, while interest rates float
abstract contract HourlyBondSubscriptionLending is BaseLending {
struct HourlyBondMetadata {
YieldAccumulator yieldAccumulator;
uint256 buyingSpeed;
uint256 withdrawingSpeed;
uint256 lastBought;
uint256 lastWithdrawn;
}
mapping(address => HourlyBondMetadata) hourlyBondMetadata;
uint256 public withdrawalWindow = 15 minutes;
// issuer => holder => bond record
mapping(address => mapping(address => HourlyBond))
public hourlyBondAccounts;
uint256 public borrowingFactorPercent = 200;
function _makeHourlyBond(
address issuer,
address holder,
uint256 amount
) internal {
HourlyBond storage bond = hourlyBondAccounts[issuer][holder];
updateHourlyBondAmount(issuer, bond);
HourlyBondMetadata storage bondMeta = hourlyBondMetadata[issuer];
bond.yieldQuotientFP = bondMeta.yieldAccumulator.accumulatorFP;
bond.moduloHour = block.timestamp % (1 hours);
bond.amount += amount;
lendingMeta[issuer].totalLending += amount;
(bondMeta.buyingSpeed, bondMeta.lastBought) = updateSpeed(
bondMeta.buyingSpeed,
bondMeta.lastBought,
amount,
1 hours
);
}
function updateHourlyBondAmount(address issuer, HourlyBond storage bond)
internal
{
uint256 yieldQuotientFP = bond.yieldQuotientFP;
if (yieldQuotientFP > 0) {
YieldAccumulator storage yA =
getUpdatedHourlyYield(issuer, hourlyBondMetadata[issuer]);
uint256 oldAmount = bond.amount;
bond.amount = applyInterest(
bond.amount,
yA.accumulatorFP,
yieldQuotientFP
);
uint256 deltaAmount = bond.amount - oldAmount;
lendingMeta[issuer].totalLending += deltaAmount;
}
}
// Retrieves bond balance for issuer and holder
function viewHourlyBondAmount(address issuer, address holder)
public
view
returns (uint256)
{
HourlyBond storage bond = hourlyBondAccounts[issuer][holder];
uint256 yieldQuotientFP = bond.yieldQuotientFP;
uint256 cumulativeYield =
viewCumulativeYieldFP(
hourlyBondMetadata[issuer].yieldAccumulator,
block.timestamp
);
if (yieldQuotientFP > 0) {
return applyInterest(bond.amount, cumulativeYield, yieldQuotientFP);
} else {
return bond.amount;
}
}
function _withdrawHourlyBond(
address issuer,
HourlyBond storage bond,
uint256 amount
) internal {
// how far the current hour has advanced (relative to acccount hourly clock)
uint256 currentOffset = (block.timestamp - bond.moduloHour) % (1 hours);
require(
withdrawalWindow >= currentOffset,
"Tried withdrawing outside subscription cancellation time window"
);
bond.amount -= amount;
lendingMeta[issuer].totalLending -= amount;
HourlyBondMetadata storage bondMeta = hourlyBondMetadata[issuer];
(bondMeta.withdrawingSpeed, bondMeta.lastWithdrawn) = updateSpeed(
bondMeta.withdrawingSpeed,
bondMeta.lastWithdrawn,
bond.amount,
1 hours
);
}
function calcCumulativeYieldFP(
YieldAccumulator storage yieldAccumulator,
uint256 timeDelta
) internal view returns (uint256 accumulatorFP) {
uint256 secondsDelta = timeDelta % (1 hours);
// linearly interpolate interest for seconds
// FP * FP * 1 / (FP * 1) = FP
accumulatorFP =
yieldAccumulator.accumulatorFP +
(yieldAccumulator.accumulatorFP *
(yieldAccumulator.hourlyYieldFP - FP32) *
secondsDelta) /
(FP32 * 1 hours);
uint256 hoursDelta = timeDelta / (1 hours);
if (hoursDelta > 0) {
// This loop should hardly ever 1 or more unless something bad happened
// In which case it costs gas but there isn't overflow
for (uint256 i = 0; hoursDelta > i; i++) {
// FP32 * FP32 / FP32 = FP32
accumulatorFP =
(accumulatorFP * yieldAccumulator.hourlyYieldFP) /
FP32;
}
}
}
/// @dev updates yield accumulators for both borrowing and lending
function getUpdatedHourlyYield(
address issuer,
HourlyBondMetadata storage bondMeta
) internal returns (YieldAccumulator storage accumulator) {
accumulator = bondMeta.yieldAccumulator;
uint256 lastUpdated = accumulator.lastUpdated;
uint256 timeDelta = (block.timestamp - lastUpdated);
YieldAccumulator storage borrowAccumulator =
borrowYieldAccumulators[issuer];
if (timeDelta > (5 minutes)) {
accumulator.accumulatorFP = calcCumulativeYieldFP(
accumulator,
timeDelta
);
LendingMetadata storage meta = lendingMeta[issuer];
uint256 yieldGeneratedFP =
(borrowAccumulator.hourlyYieldFP * meta.totalBorrowed) /
(1 + meta.totalLending);
uint256 _maxHourlyYieldFP = min(maxHourlyYieldFP, yieldGeneratedFP);
accumulator.hourlyYieldFP = updatedYieldFP(
accumulator.hourlyYieldFP,
lastUpdated,
meta.totalLending,
lendingTarget(meta),
bondMeta.buyingSpeed,
bondMeta.withdrawingSpeed,
_maxHourlyYieldFP
);
accumulator.lastUpdated = block.timestamp;
}
updateBorrowYieldAccu(borrowAccumulator);
borrowAccumulator.hourlyYieldFP =
1 +
(borrowingFactorPercent * accumulator.hourlyYieldFP) /
100;
}
function updateBorrowYieldAccu(YieldAccumulator storage borrowAccumulator)
internal
{
uint256 timeDelta = block.timestamp - borrowAccumulator.lastUpdated;
if (timeDelta > (5 minutes)) {
borrowAccumulator.accumulatorFP = calcCumulativeYieldFP(
borrowAccumulator,
timeDelta
);
borrowAccumulator.lastUpdated = block.timestamp;
}
}
function getUpdatedBorrowYieldAccuFP(address issuer)
external
returns (uint256)
{
YieldAccumulator storage yA = borrowYieldAccumulators[issuer];
updateBorrowYieldAccu(yA);
return yA.accumulatorFP;
}
function viewCumulativeYieldFP(
YieldAccumulator storage yA,
uint256 timestamp
) internal view returns (uint256) {
uint256 timeDelta = (timestamp - yA.lastUpdated);
if (timeDelta > 5 minutes) {
return calcCumulativeYieldFP(yA, timeDelta);
} else {
return yA.accumulatorFP;
}
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "./RoleAware.sol";
import "./Fund.sol";
struct Claim {
uint256 startingRewardRateFP;
uint256 amount;
uint256 intraDayGain;
uint256 intraDayLoss;
}
/// @title Manage distribution of liquidity stake incentives
/// Some efforts have been made to reduce gas cost at claim time
/// and shift gas burden onto those who would want to withdraw
contract IncentiveDistribution is RoleAware {
// fixed point number factor
uint256 internal constant FP32 = 2**32;
// the amount of contraction per thousand, per day
// of the overal daily incentive distribution
// https://en.wikipedia.org/wiki/Per_mil
uint256 public constant contractionPerMil = 999;
address public immutable MFI;
constructor(
address _MFI,
uint256 startingDailyDistributionWithoutDecimals,
address _roles
) RoleAware(_roles) {
MFI = _MFI;
currentDailyDistribution =
startingDailyDistributionWithoutDecimals *
(1 ether);
lastUpdatedDay = block.timestamp % (1 days);
}
// how much is going to be distributed, contracts every day
uint256 public currentDailyDistribution;
uint256 public trancheShareTotal;
uint256[] public allTranches;
struct TrancheMeta {
// portion of daily distribution per each tranche
uint256 rewardShare;
uint256 currentDayGains;
uint256 currentDayLosses;
uint256 tomorrowOngoingTotals;
uint256 yesterdayOngoingTotals;
// aggregate all the unclaimed intra-days
uint256 intraDayGains;
uint256 intraDayLosses;
uint256 intraDayRewardGains;
uint256 intraDayRewardLosses;
// how much each claim unit would get if they had staked from the dawn of time
// expressed as fixed point number
// claim amounts are expressed relative to this ongoing aggregate
uint256 aggregateDailyRewardRateFP;
uint256 yesterdayRewardRateFP;
mapping(address => Claim) claims;
}
mapping(uint256 => TrancheMeta) public trancheMetadata;
// last updated day
uint256 public lastUpdatedDay;
mapping(address => uint256) public accruedReward;
/// Set share of tranche
function setTrancheShare(uint256 tranche, uint256 share)
external
onlyOwnerExecActivator
{
require(
trancheMetadata[tranche].rewardShare > 0,
"Tranche not initialized"
);
_setTrancheShare(tranche, share);
}
function _setTrancheShare(uint256 tranche, uint256 share) internal {
TrancheMeta storage tm = trancheMetadata[tranche];
if (share > tm.rewardShare) {
trancheShareTotal += share - tm.rewardShare;
} else {
trancheShareTotal -= tm.rewardShare - share;
}
tm.rewardShare = share;
}
/// Initialize tranche
function initTranche(uint256 tranche, uint256 share)
external
onlyOwnerExecActivator
{
TrancheMeta storage tm = trancheMetadata[tranche];
require(tm.rewardShare == 0, "Tranche already initialized");
_setTrancheShare(tranche, share);
// simply initialize to 1.0
tm.aggregateDailyRewardRateFP = FP32;
allTranches.push(tranche);
}
/// Start / increase amount of claim
function addToClaimAmount(
uint256 tranche,
address recipient,
uint256 claimAmount
) external {
require(
isIncentiveReporter(msg.sender),
"Contract not authorized to report incentives"
);
if (currentDailyDistribution > 0) {
TrancheMeta storage tm = trancheMetadata[tranche];
Claim storage claim = tm.claims[recipient];
uint256 currentDay =
claimAmount * (1 days - (block.timestamp % (1 days)));
tm.currentDayGains += currentDay;
claim.intraDayGain += currentDay * currentDailyDistribution;
tm.tomorrowOngoingTotals += claimAmount * 1 days;
updateAccruedReward(tm, recipient, claim);
claim.amount += claimAmount * (1 days);
}
}
/// Decrease amount of claim
function subtractFromClaimAmount(
uint256 tranche,
address recipient,
uint256 subtractAmount
) external {
require(
isIncentiveReporter(msg.sender),
"Contract not authorized to report incentives"
);
uint256 currentDay = subtractAmount * (block.timestamp % (1 days));
TrancheMeta storage tm = trancheMetadata[tranche];
Claim storage claim = tm.claims[recipient];
tm.currentDayLosses += currentDay;
claim.intraDayLoss += currentDay * currentDailyDistribution;
tm.tomorrowOngoingTotals -= subtractAmount * 1 days;
updateAccruedReward(tm, recipient, claim);
claim.amount -= subtractAmount * (1 days);
}
function updateAccruedReward(
TrancheMeta storage tm,
address recipient,
Claim storage claim
) internal returns (uint256 rewardDelta) {
if (claim.startingRewardRateFP > 0) {
rewardDelta = calcRewardAmount(tm, claim);
accruedReward[recipient] += rewardDelta;
}
// don't reward for current day (approximately)
claim.startingRewardRateFP =
tm.yesterdayRewardRateFP +
tm.aggregateDailyRewardRateFP;
}
/// @dev additional reward accrued since last update
function calcRewardAmount(TrancheMeta storage tm, Claim storage claim)
internal
view
returns (uint256 rewardAmount)
{
uint256 ours = claim.startingRewardRateFP;
uint256 aggregate = tm.aggregateDailyRewardRateFP;
if (aggregate > ours) {
rewardAmount = (claim.amount * (aggregate - ours)) / FP32;
}
}
function applyIntraDay(TrancheMeta storage tm, Claim storage claim)
internal
view
returns (uint256 gainImpact, uint256 lossImpact)
{
uint256 gain = claim.intraDayGain;
uint256 loss = claim.intraDayLoss;
if (gain + loss > 0) {
gainImpact =
(gain * tm.intraDayRewardGains) /
(tm.intraDayGains + 1);
lossImpact =
(loss * tm.intraDayRewardLosses) /
(tm.intraDayLosses + 1);
}
}
/// Get a view of reward amount
function viewRewardAmount(uint256 tranche, address claimant)
external
view
returns (uint256)
{
TrancheMeta storage tm = trancheMetadata[tranche];
Claim storage claim = tm.claims[claimant];
uint256 rewardAmount =
accruedReward[claimant] + calcRewardAmount(tm, claim);
(uint256 gainImpact, uint256 lossImpact) = applyIntraDay(tm, claim);
return rewardAmount + gainImpact - lossImpact;
}
/// Withdraw current reward amount
function withdrawReward(uint256[] calldata tranches)
external
returns (uint256 withdrawAmount)
{
updateDayTotals();
withdrawAmount = accruedReward[msg.sender];
for (uint256 i; tranches.length > i; i++) {
uint256 tranche = tranches[i];
TrancheMeta storage tm = trancheMetadata[tranche];
Claim storage claim = tm.claims[msg.sender];
withdrawAmount += updateAccruedReward(tm, msg.sender, claim);
(uint256 gainImpact, uint256 lossImpact) = applyIntraDay(tm, claim);
withdrawAmount = withdrawAmount + gainImpact - lossImpact;
tm.intraDayGains -= claim.intraDayGain;
tm.intraDayLosses -= claim.intraDayLoss;
tm.intraDayRewardGains -= gainImpact;
tm.intraDayRewardLosses -= lossImpact;
claim.intraDayGain = 0;
}
accruedReward[msg.sender] = 0;
Fund(fund()).withdraw(MFI, msg.sender, withdrawAmount);
}
function updateDayTotals() internal {
uint256 nowDay = block.timestamp / (1 days);
uint256 dayDiff = nowDay - lastUpdatedDay;
// shrink the daily distribution for every day that has passed
for (uint256 i = 0; i < dayDiff; i++) {
_updateTrancheTotals();
currentDailyDistribution =
(currentDailyDistribution * contractionPerMil) /
1000;
lastUpdatedDay += 1;
}
}
function _updateTrancheTotals() internal {
for (uint256 i; allTranches.length > i; i++) {
uint256 tranche = allTranches[i];
TrancheMeta storage tm = trancheMetadata[tranche];
uint256 todayTotal =
tm.yesterdayOngoingTotals +
tm.currentDayGains -
tm.currentDayLosses;
uint256 todayRewardRateFP =
(FP32 * (currentDailyDistribution * tm.rewardShare)) /
trancheShareTotal /
todayTotal;
tm.yesterdayRewardRateFP = todayRewardRateFP;
tm.aggregateDailyRewardRateFP += todayRewardRateFP;
tm.intraDayGains += tm.currentDayGains * currentDailyDistribution;
tm.intraDayLosses += tm.currentDayLosses * currentDailyDistribution;
tm.intraDayRewardGains +=
(tm.currentDayGains * todayRewardRateFP) /
FP32;
tm.intraDayRewardLosses +=
(tm.currentDayLosses * todayRewardRateFP) /
FP32;
tm.yesterdayOngoingTotals = tm.tomorrowOngoingTotals;
tm.currentDayGains = 0;
tm.currentDayLosses = 0;
}
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "./IncentiveDistribution.sol";
import "./RoleAware.sol";
/// @title helper class to facilitate staking and unstaking
/// within the incentive system.
abstract contract IncentivizedHolder is RoleAware {
/// @dev here we cache incentive tranches to save on a bit of gas
mapping(address => uint256) public incentiveTranches;
/// Set incentive tranche
function setIncentiveTranche(address token, uint8 tranche)
external
onlyOwnerExecActivator
{
incentiveTranches[token] = tranche;
}
function stakeClaim(
address claimant,
address token,
uint256 amount
) internal {
IncentiveDistribution iD =
IncentiveDistribution(incentiveDistributor());
uint256 tranche = incentiveTranches[token];
iD.addToClaimAmount(tranche, claimant, amount);
}
function withdrawClaim(
address claimant,
address token,
uint256 amount
) internal {
uint256 tranche = incentiveTranches[token];
IncentiveDistribution(incentiveDistributor()).subtractFromClaimAmount(
tranche,
claimant,
amount
);
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "./Fund.sol";
import "./HourlyBondSubscriptionLending.sol";
import "./BondLending.sol";
import "./IncentivizedHolder.sol";
// TODO activate bonds for lending
/// @title Manage lending for a variety of bond issuers
contract Lending is
RoleAware,
HourlyBondSubscriptionLending,
BondLending,
IncentivizedHolder
{
/// @dev IDs for all bonds held by an address
mapping(address => uint256[]) public bondIds;
/// mapping issuers to tokens
/// (in crossmargin, the issuers are tokens themselves)
mapping(address => address) public issuerTokens;
/// In case of shortfall, adjust debt
mapping(address => uint256) public haircuts;
/// map of available issuers
mapping(address => bool) public activeIssuers;
constructor(address _roles) RoleAware(_roles) {
uint256 APR = 899;
maxHourlyYieldFP = (FP32 * APR) / 100 / (24 * 365);
uint256 aprChangePerMil = 3;
yieldChangePerSecondFP = (FP32 * aprChangePerMil) / 1000;
}
/// Make a issuer available for protocol
function activateIssuer(address issuer) external {
activateIssuer(issuer, issuer);
}
/// Make issuer != token available for protocol (isol. margin)
function activateIssuer(address issuer, address token)
public
onlyOwnerExecActivator
{
activeIssuers[issuer] = true;
issuerTokens[issuer] = token;
}
/// Remove a issuer from trading availability
function deactivateIssuer(address issuer) external onlyOwnerExecActivator {
activeIssuers[issuer] = false;
}
/// Set lending cap
function setLendingCap(address issuer, uint256 cap)
external
onlyOwnerExecActivator
{
lendingMeta[issuer].lendingCap = cap;
}
/// Set lending buffer
function setLendingBuffer(address issuer, uint256 buffer)
external
onlyOwnerExecActivator
{
lendingMeta[issuer].lendingBuffer = buffer;
}
/// Set withdrawal window
function setWithdrawalWindow(uint256 window) external onlyOwnerExec {
withdrawalWindow = window;
}
/// Set hourly yield APR for issuer
function setHourlyYieldAPR(address issuer, uint256 aprPercent)
external
onlyOwnerExecActivator
{
HourlyBondMetadata storage bondMeta = hourlyBondMetadata[issuer];
if (bondMeta.yieldAccumulator.accumulatorFP == 0) {
uint256 yieldFP = FP32 + (FP32 * aprPercent) / 100 / (24 * 365);
bondMeta.yieldAccumulator = YieldAccumulator({
accumulatorFP: FP32,
lastUpdated: block.timestamp,
hourlyYieldFP: yieldFP
});
bondMeta.buyingSpeed = 1;
bondMeta.withdrawingSpeed = 1;
bondMeta.lastBought = block.timestamp;
bondMeta.lastWithdrawn = block.timestamp;
} else {
YieldAccumulator storage yA =
getUpdatedHourlyYield(issuer, bondMeta);
yA.hourlyYieldFP = (FP32 * (100 + aprPercent)) / 100 / (24 * 365);
}
}
/// Set maximum hourly yield in floating point
function setMaxHourlyYieldFP(uint256 maxYieldFP) external onlyOwnerExec {
maxHourlyYieldFP = maxYieldFP;
}
/// Set yield change per second in floating point
function setYieldChangePerSecondFP(uint256 changePerSecondFP)
external
onlyOwnerExec
{
yieldChangePerSecondFP = changePerSecondFP;
}
/// Set runtime yields in floating point
function setRuntimeYieldsFP(address issuer, uint256[] memory yieldsFP)
external
onlyOwnerExec
{
BondBucketMetadata[] storage bondMetas = bondBucketMetadata[issuer];
for (uint256 i; bondMetas.length > i; i++) {
bondMetas[i].runtimeYieldFP = yieldsFP[i];
}
}
/// Set miniumum runtime
function setMinRuntime(uint256 runtime) external onlyOwnerExec {
require(runtime > 1 hours, "Min runtime > 1 hour");
require(maxRuntime > runtime, "Runtime too long");
minRuntime = runtime;
}
/// Set maximum runtime
function setMaxRuntime(uint256 runtime) external onlyOwnerExec {
require(runtime > minRuntime, "Max > min runtime");
maxRuntime = runtime;
}
/// Set runtime weights in floating point
function setRuntimeWeights(address issuer, uint256[] memory weights)
external
onlyOwnerExecActivator
{
BondBucketMetadata[] storage bondMetas = bondBucketMetadata[issuer];
if (bondMetas.length == 0) {
// we are initializing
uint256 hourlyYieldFP = (110 * FP32) / 100 / (24 * 365);
uint256 bucketSize = diffMaxMinRuntime / weights.length;
for (uint256 i; weights.length > i; i++) {
uint256 runtime = minRuntime + bucketSize * i;
bondMetas.push(
BondBucketMetadata({
runtimeYieldFP: (hourlyYieldFP * runtime) / (1 hours),
lastBought: block.timestamp,
lastWithdrawn: block.timestamp,
yieldLastUpdated: block.timestamp,
buyingSpeed: 1,
withdrawingSpeed: 1,
runtimeWeight: weights[i],
totalLending: 0
})
);
}
} else {
require(weights.length == bondMetas.length, "Weights don't match");
for (uint256 i; weights.length > i; i++) {
bondMetas[i].runtimeWeight = weights[i];
}
}
}
/// @dev how much interest has accrued to a borrowed balance over time
function applyBorrowInterest(
uint256 balance,
address issuer,
uint256 yieldQuotientFP
) external returns (uint256 balanceWithInterest, uint256 accumulatorFP) {
require(isBorrower(msg.sender), "Not approved call");
YieldAccumulator storage yA = borrowYieldAccumulators[issuer];
updateBorrowYieldAccu(yA);
accumulatorFP = yA.accumulatorFP;
balanceWithInterest = applyInterest(
balance,
accumulatorFP,
yieldQuotientFP
);
uint256 deltaAmount = balanceWithInterest - balance;
LendingMetadata storage meta = lendingMeta[issuer];
meta.totalBorrowed += deltaAmount;
}
/// @dev view function to get balance with borrowing interest applied
function viewWithBorrowInterest(
uint256 balance,
address issuer,
uint256 yieldQuotientFP
) external view returns (uint256) {
uint256 accumulatorFP =
viewCumulativeYieldFP(
borrowYieldAccumulators[issuer],
block.timestamp
);
return applyInterest(balance, accumulatorFP, yieldQuotientFP);
}
/// @dev gets called by router to register if a trader borrows issuers
function registerBorrow(address issuer, uint256 amount) external {
require(isBorrower(msg.sender), "Not approved borrower");
require(activeIssuers[issuer], "Not approved issuer");
LendingMetadata storage meta = lendingMeta[issuer];
meta.totalBorrowed += amount;
require(
meta.totalLending >= meta.totalBorrowed,
"Insufficient lending"
);
}
/// @dev gets called by router if loan is extinguished
function payOff(address issuer, uint256 amount) external {
require(isBorrower(msg.sender), "Not approved borrower");
lendingMeta[issuer].totalBorrowed -= amount;
}
/// @dev get the borrow yield for a specific issuer/token
function viewAccumulatedBorrowingYieldFP(address issuer)
external
view
returns (uint256)
{
YieldAccumulator storage yA = borrowYieldAccumulators[issuer];
return viewCumulativeYieldFP(yA, block.timestamp);
}
function viewAPRPer10k(YieldAccumulator storage yA)
internal
view
returns (uint256)
{
uint256 hourlyYieldFP = yA.hourlyYieldFP;
uint256 aprFP =
((hourlyYieldFP * 10_000 - FP32 * 10_000) * 365 days) / (1 hours);
return aprFP / FP32;
}
/// @dev get current borrowing interest per 10k for a token / issuer
function viewBorrowAPRPer10k(address issuer)
external
view
returns (uint256)
{
return viewAPRPer10k(borrowYieldAccumulators[issuer]);
}
/// @dev get current lending APR per 10k for a token / issuer
function viewHourlyBondAPRPer10k(address issuer)
external
view
returns (uint256)
{
return viewAPRPer10k(hourlyBondMetadata[issuer].yieldAccumulator);
}
/// @dev In a liquidity crunch make a fallback bond until liquidity is good again
function _makeFallbackBond(
address issuer,
address holder,
uint256 amount
) internal override {
_makeHourlyBond(issuer, holder, amount);
}
/// @dev withdraw an hour bond
function withdrawHourlyBond(address issuer, uint256 amount) external {
HourlyBond storage bond = hourlyBondAccounts[issuer][msg.sender];
// apply all interest
updateHourlyBondAmount(issuer, bond);
super._withdrawHourlyBond(issuer, bond, amount);
if (bond.amount == 0) {
delete hourlyBondAccounts[issuer][msg.sender];
}
disburse(issuer, msg.sender, amount);
withdrawClaim(msg.sender, issuer, amount);
}
/// Shut down hourly bond account for `issuer`
function closeHourlyBondAccount(address issuer) external {
HourlyBond storage bond = hourlyBondAccounts[issuer][msg.sender];
// apply all interest
updateHourlyBondAmount(issuer, bond);
uint256 amount = bond.amount;
super._withdrawHourlyBond(issuer, bond, amount);
disburse(issuer, msg.sender, amount);
delete hourlyBondAccounts[issuer][msg.sender];
withdrawClaim(msg.sender, issuer, amount);
}
/// @dev buy hourly bond subscription
function buyHourlyBondSubscription(address issuer, uint256 amount)
external
{
require(activeIssuers[issuer], "Not approved issuer");
LendingMetadata storage meta = lendingMeta[issuer];
if (lendingTarget(meta) >= meta.totalLending + amount) {
collectToken(issuer, msg.sender, amount);
super._makeHourlyBond(issuer, msg.sender, amount);
stakeClaim(msg.sender, issuer, amount);
}
}
/// @dev buy fixed term bond that does not renew
function buyBond(
address issuer,
uint256 runtime,
uint256 amount,
uint256 minReturn
) external returns (uint256 bondIndex) {
require(activeIssuers[issuer], "Not approved issuer");
LendingMetadata storage meta = lendingMeta[issuer];
if (
lendingTarget(meta) >= meta.totalLending + amount &&
maxRuntime >= runtime &&
runtime >= minRuntime
) {
bondIndex = super._makeBond(
msg.sender,
issuer,
runtime,
amount,
minReturn
);
if (bondIndex > 0) {
bondIds[msg.sender].push(bondIndex);
collectToken(issuer, msg.sender, amount);
stakeClaim(msg.sender, issuer, amount);
}
}
}
/// @dev send back funds of bond after maturity
function withdrawBond(uint256 bondId) external {
Bond storage bond = bonds[bondId];
require(msg.sender == bond.holder, "Not bond holder");
require(
block.timestamp > bond.maturityTimestamp,
"bond is still immature"
);
// in case of a shortfall, governance can step in to provide
// additonal compensation beyond the usual incentive which
// gets withdrawn here
withdrawClaim(msg.sender, bond.issuer, bond.originalPrice);
uint256 withdrawAmount = super._withdrawBond(bondId, bond);
disburse(bond.issuer, msg.sender, withdrawAmount);
}
function initBorrowYieldAccumulator(address issuer)
external
onlyOwnerExecActivator
{
YieldAccumulator storage yA = borrowYieldAccumulators[issuer];
require(yA.accumulatorFP == 0, "don't re-initialize");
yA.accumulatorFP = FP32;
yA.lastUpdated = block.timestamp;
yA.hourlyYieldFP = FP32 + FP32 / (365 * 24);
}
function setBorrowingFactorPercent(uint256 borrowingFactor)
external
onlyOwnerExec
{
borrowingFactorPercent = borrowingFactor;
}
function issuanceBalance(address issuer)
internal
view
override
returns (uint256)
{
address token = issuerTokens[issuer];
if (token == issuer) {
// cross margin
return IERC20(token).balanceOf(fund());
} else {
return lendingMeta[issuer].totalLending - haircuts[issuer];
}
}
function disburse(
address issuer,
address recipient,
uint256 amount
) internal {
uint256 haircutAmount = haircuts[issuer];
if (haircutAmount > 0 && amount > 0) {
uint256 totalLending = lendingMeta[issuer].totalLending;
uint256 adjustment =
(amount * min(totalLending, haircutAmount)) / totalLending;
amount = amount - adjustment;
haircuts[issuer] -= adjustment;
}
address token = issuerTokens[issuer];
Fund(fund()).withdraw(token, recipient, amount);
}
function collectToken(
address issuer,
address source,
uint256 amount
) internal {
Fund(fund()).depositFor(source, issuer, amount);
}
function haircut(uint256 amount) external {
haircuts[msg.sender] += amount;
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol";
import "./RoleAware.sol";
import "../interfaces/IMarginTrading.sol";
import "./Lending.sol";
import "./Admin.sol";
import "./IncentivizedHolder.sol";
import "./BaseRouter.sol";
/// @title Top level transaction controller
contract MarginRouter is RoleAware, IncentivizedHolder, BaseRouter {
event AccountUpdated(address indexed trader);
uint256 public constant mswapFeesPer10k = 10;
address public immutable WETH;
constructor(address _WETH, address _roles) RoleAware(_roles) {
WETH = _WETH;
}
///////////////////////////
// Cross margin endpoints
///////////////////////////
/// @notice traders call this to deposit funds on cross margin
function crossDeposit(address depositToken, uint256 depositAmount)
external
{
Fund(fund()).depositFor(msg.sender, depositToken, depositAmount);
uint256 extinguishAmount =
IMarginTrading(crossMarginTrading()).registerDeposit(
msg.sender,
depositToken,
depositAmount
);
if (extinguishAmount > 0) {
Lending(lending()).payOff(depositToken, extinguishAmount);
withdrawClaim(msg.sender, depositToken, extinguishAmount);
}
emit AccountUpdated(msg.sender);
}
/// @notice deposit wrapped ehtereum into cross margin account
function crossDepositETH() external payable {
Fund(fund()).depositToWETH{value: msg.value}();
uint256 extinguishAmount =
IMarginTrading(crossMarginTrading()).registerDeposit(
msg.sender,
WETH,
msg.value
);
if (extinguishAmount > 0) {
Lending(lending()).payOff(WETH, extinguishAmount);
withdrawClaim(msg.sender, WETH, extinguishAmount);
}
emit AccountUpdated(msg.sender);
}
/// @notice withdraw deposits/earnings from cross margin account
function crossWithdraw(address withdrawToken, uint256 withdrawAmount)
external
{
IMarginTrading(crossMarginTrading()).registerWithdrawal(
msg.sender,
withdrawToken,
withdrawAmount
);
Fund(fund()).withdraw(withdrawToken, msg.sender, withdrawAmount);
emit AccountUpdated(msg.sender);
}
/// @notice withdraw ethereum from cross margin account
function crossWithdrawETH(uint256 withdrawAmount) external {
IMarginTrading(crossMarginTrading()).registerWithdrawal(
msg.sender,
WETH,
withdrawAmount
);
Fund(fund()).withdrawETH(msg.sender, withdrawAmount);
emit AccountUpdated(msg.sender);
}
/// @notice borrow into cross margin trading account
function crossBorrow(address borrowToken, uint256 borrowAmount) external {
Lending(lending()).registerBorrow(borrowToken, borrowAmount);
IMarginTrading(crossMarginTrading()).registerBorrow(
msg.sender,
borrowToken,
borrowAmount
);
stakeClaim(msg.sender, borrowToken, borrowAmount);
emit AccountUpdated(msg.sender);
}
/// @notice convenience function to perform overcollateralized borrowing
/// against a cross margin account.
/// @dev caution: the account still has to have a positive balaance at the end
/// of the withdraw. So an underwater account may not be able to withdraw
function crossOvercollateralizedBorrow(
address depositToken,
uint256 depositAmount,
address borrowToken,
uint256 withdrawAmount
) external {
Fund(fund()).depositFor(msg.sender, depositToken, depositAmount);
Lending(lending()).registerBorrow(borrowToken, withdrawAmount);
IMarginTrading(crossMarginTrading()).registerOvercollateralizedBorrow(
msg.sender,
depositToken,
depositAmount,
borrowToken,
withdrawAmount
);
Fund(fund()).withdraw(borrowToken, msg.sender, withdrawAmount);
stakeClaim(msg.sender, borrowToken, withdrawAmount);
emit AccountUpdated(msg.sender);
}
/// @notice close an account that is no longer borrowing and return gains
function crossCloseAccount() external {
(address[] memory holdingTokens, uint256[] memory holdingAmounts) =
IMarginTrading(crossMarginTrading()).getHoldingAmounts(msg.sender);
// requires all debts paid off
IMarginTrading(crossMarginTrading()).registerLiquidation(msg.sender);
for (uint256 i; holdingTokens.length > i; i++) {
Fund(fund()).withdraw(
holdingTokens[i],
msg.sender,
holdingAmounts[i]
);
}
emit AccountUpdated(msg.sender);
}
/// @notice entry point for swapping tokens held in cross margin account
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
bytes32 amms,
address[] calldata tokens,
uint256 deadline
) external ensure(deadline) returns (uint256[] memory amounts) {
// calc fees
uint256 fees = takeFeesFromInput(amountIn);
address[] memory pairs;
(amounts, pairs) = UniswapStyleLib.getAmountsOut(
amountIn - fees,
amms,
tokens
);
// checks that trader is within allowed lending bounds
registerTrade(
msg.sender,
tokens[0],
tokens[tokens.length - 1],
amountIn,
amounts[amounts.length - 1]
);
_fundSwapExactT4T(amounts, amountOutMin, pairs, tokens);
}
/// @notice entry point for swapping tokens held in cross margin account
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
bytes32 amms,
address[] calldata tokens,
uint256 deadline
) external ensure(deadline) returns (uint256[] memory amounts) {
address[] memory pairs;
(amounts, pairs) = UniswapStyleLib.getAmountsIn(
amountOut + takeFeesFromOutput(amountOut),
amms,
tokens
);
// checks that trader is within allowed lending bounds
registerTrade(
msg.sender,
tokens[0],
tokens[tokens.length - 1],
amounts[0],
amountOut
);
_fundSwapT4ExactT(amounts, amountInMax, pairs, tokens);
}
/// @dev helper function does all the work of telling other contracts
/// about a cross margin trade
function registerTrade(
address trader,
address inToken,
address outToken,
uint256 inAmount,
uint256 outAmount
) internal {
(uint256 extinguishAmount, uint256 borrowAmount) =
IMarginTrading(crossMarginTrading()).registerTradeAndBorrow(
trader,
inToken,
outToken,
inAmount,
outAmount
);
if (extinguishAmount > 0) {
Lending(lending()).payOff(outToken, extinguishAmount);
withdrawClaim(trader, outToken, extinguishAmount);
}
if (borrowAmount > 0) {
Lending(lending()).registerBorrow(inToken, borrowAmount);
stakeClaim(trader, inToken, borrowAmount);
}
emit AccountUpdated(trader);
}
/////////////
// Helpers
/////////////
/// @dev internal helper swapping exact token for token on AMM
function _fundSwapExactT4T(
uint256[] memory amounts,
uint256 amountOutMin,
address[] memory pairs,
address[] calldata tokens
) internal {
require(
amounts[amounts.length - 1] >= amountOutMin,
"MarginRouter: INSUFFICIENT_OUTPUT_AMOUNT"
);
Fund(fund()).withdraw(tokens[0], pairs[0], amounts[0]);
_swap(amounts, pairs, tokens, fund());
}
/// @notice make swaps on AMM using protocol funds, only for authorized contracts
function authorizedSwapExactT4T(
uint256 amountIn,
uint256 amountOutMin,
bytes32 amms,
address[] calldata tokens
) external returns (uint256[] memory amounts) {
require(
isAuthorizedFundTrader(msg.sender),
"Calling contract is not authorized to trade with protocl funds"
);
address[] memory pairs;
(amounts, pairs) = UniswapStyleLib.getAmountsOut(
amountIn,
amms,
tokens
);
_fundSwapExactT4T(amounts, amountOutMin, pairs, tokens);
}
// @dev internal helper swapping exact token for token on on AMM
function _fundSwapT4ExactT(
uint256[] memory amounts,
uint256 amountInMax,
address[] memory pairs,
address[] calldata tokens
) internal {
require(
amounts[0] <= amountInMax,
"MarginRouter: EXCESSIVE_INPUT_AMOUNT"
);
Fund(fund()).withdraw(tokens[0], pairs[0], amounts[0]);
_swap(amounts, pairs, tokens, fund());
}
//// @notice swap protocol funds on AMM, only for authorized
function authorizedSwapT4ExactT(
uint256 amountOut,
uint256 amountInMax,
bytes32 amms,
address[] calldata tokens
) external returns (uint256[] memory amounts) {
require(
isAuthorizedFundTrader(msg.sender),
"Calling contract is not authorized to trade with protocl funds"
);
address[] memory pairs;
(amounts, pairs) = UniswapStyleLib.getAmountsIn(
amountOut,
amms,
tokens
);
_fundSwapT4ExactT(amounts, amountInMax, pairs, tokens);
}
function takeFeesFromOutput(uint256 amount)
internal
pure
returns (uint256 fees)
{
fees = (mswapFeesPer10k * amount) / 10_000;
}
function takeFeesFromInput(uint256 amount)
internal
pure
returns (uint256 fees)
{
fees = (mswapFeesPer10k * amount) / (10_000 + mswapFeesPer10k);
}
function getAmountsOut(
uint256 inAmount,
bytes32 amms,
address[] calldata tokens
) external view returns (uint256[] memory amounts) {
(amounts, ) = UniswapStyleLib.getAmountsOut(inAmount, amms, tokens);
}
function getAmountsIn(
uint256 outAmount,
bytes32 amms,
address[] calldata tokens
) external view returns (uint256[] memory amounts) {
(amounts, ) = UniswapStyleLib.getAmountsIn(outAmount, amms, tokens);
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "./RoleAware.sol";
import "./MarginRouter.sol";
import "../libraries/UniswapStyleLib.sol";
/// Stores how many of token you could get for 1k of peg
struct TokenPrice {
uint256 blockLastUpdated;
uint256 tokenPerRefAmount;
address[] liquidationTokens;
bytes32 amms;
address[] inverseLiquidationTokens;
bytes32 inverseAmms;
}
struct VolatilitySetting {
uint256 priceUpdateWindow;
uint256 updateRatePermil;
}
/// @title The protocol features several mechanisms to prevent vulnerability to
/// price manipulation:
/// 1) global exposure caps on all tokens which need to be raised gradually
/// during the process of introducing a new token, making attacks unprofitable
/// due to lack of scale
/// 2) Exponential moving average with cautious price update. Prices for estimating
/// how much a trader can borrow need not be extremely current and precise, mainly
/// they must be resilient against extreme manipulation
/// 3) Liquidators may not call from a contract address, to prevent extreme forms of
/// of front-running and other price manipulation.
abstract contract PriceAware is RoleAware {
uint256 constant pegDecimals = 6;
uint256 constant REFERENCE_PEG_AMOUNT = 100 * (10**pegDecimals);
address public immutable peg;
mapping(address => TokenPrice) public tokenPrices;
/// update window in blocks
uint256 public priceUpdateWindow = 20;
uint256 public UPDATE_RATE_PERMIL = 50;
VolatilitySetting[] public volatilitySettings;
constructor(address _peg) {
peg = _peg;
}
/// Set window for price updates
function setPriceUpdateWindow(uint16 window) external onlyOwnerExec {
priceUpdateWindow = window;
}
/// Add a new volatility setting
function addVolatilitySetting(
uint256 _priceUpdateWindow,
uint256 _updateRatePermil
) external onlyOwnerExec {
volatilitySettings.push(
VolatilitySetting({
priceUpdateWindow: _priceUpdateWindow,
updateRatePermil: _updateRatePermil
})
);
}
/// Choose a volatitlity setting
function chooseVolatilitySetting(uint256 index)
external
onlyOwnerExecDisabler
{
VolatilitySetting storage vs = volatilitySettings[index];
if (vs.updateRatePermil > 0) {
UPDATE_RATE_PERMIL = vs.updateRatePermil;
priceUpdateWindow = vs.priceUpdateWindow;
}
}
/// Set rate for updates
function setUpdateRate(uint256 rate) external onlyOwnerExec {
UPDATE_RATE_PERMIL = rate;
}
/// Get current price of token in peg
function getCurrentPriceInPeg(address token, uint256 inAmount)
public
returns (uint256)
{
if (token == peg) {
return inAmount;
} else {
TokenPrice storage tokenPrice = tokenPrices[token];
if (
block.number - tokenPrice.blockLastUpdated >
priceUpdateWindow ||
tokenPrice.tokenPerRefAmount == 0
) {
// update the currently cached price
getPriceFromAMM(tokenPrice);
}
return
(inAmount * REFERENCE_PEG_AMOUNT) /
(tokenPrice.tokenPerRefAmount + 1);
}
}
/// Get view of current price of token in peg
function viewCurrentPriceInPeg(address token, uint256 inAmount)
public
view
returns (uint256)
{
if (token == peg) {
return inAmount;
} else {
TokenPrice storage tokenPrice = tokenPrices[token];
return
(inAmount * REFERENCE_PEG_AMOUNT) /
(tokenPrice.tokenPerRefAmount + 1);
}
}
/// @dev retrieves the price from the AMM
function getPriceFromAMM(TokenPrice storage tokenPrice) internal virtual {
(uint256[] memory pathAmounts, ) =
UniswapStyleLib.getAmountsIn(
REFERENCE_PEG_AMOUNT,
tokenPrice.amms,
tokenPrice.liquidationTokens
);
_setPriceVal(tokenPrice, pathAmounts[0], UPDATE_RATE_PERMIL);
}
function _setPriceVal(
TokenPrice storage tokenPrice,
uint256 updatePerRefAmount,
uint256 weightPerMil
) internal {
tokenPrice.tokenPerRefAmount =
(tokenPrice.tokenPerRefAmount *
(1000 - weightPerMil) +
updatePerRefAmount *
weightPerMil) /
1000;
}
/// add path from token to current liquidation peg
function setLiquidationPath(bytes32 amms, address[] memory tokens)
external
onlyOwnerExecActivator
{
address token = tokens[0];
if (token != peg) {
TokenPrice storage tokenPrice = tokenPrices[token];
tokenPrice.amms = amms;
tokenPrice.liquidationTokens = tokens;
tokenPrice.inverseLiquidationTokens = new address[](tokens.length);
bytes32 inverseAmms;
for (uint256 i = 0; tokens.length - 1 > i; i++) {
bytes32 shifted =
bytes32(amms[i]) >> ((tokens.length - 2 - i) * 8);
inverseAmms = inverseAmms | shifted;
}
tokenPrice.inverseAmms = inverseAmms;
for (uint256 i = 0; tokens.length > i; i++) {
tokenPrice.inverseLiquidationTokens[i] = tokens[
tokens.length - i - 1
];
}
(uint256[] memory pathAmounts, ) =
UniswapStyleLib.getAmountsIn(
REFERENCE_PEG_AMOUNT,
amms,
tokens
);
uint256 inAmount = pathAmounts[0];
_setPriceVal(tokenPrice, inAmount, 1000);
}
}
function liquidateToPeg(address token, uint256 amount)
internal
returns (uint256)
{
if (token == peg) {
return amount;
} else {
TokenPrice storage tP = tokenPrices[token];
uint256[] memory amounts =
MarginRouter(marginRouter()).authorizedSwapExactT4T(
amount,
0,
tP.amms,
tP.liquidationTokens
);
uint256 outAmount = amounts[amounts.length - 1];
return outAmount;
}
}
function liquidateFromPeg(address token, uint256 targetAmount)
internal
returns (uint256)
{
if (token == peg) {
return targetAmount;
} else {
TokenPrice storage tP = tokenPrices[token];
uint256[] memory amounts =
MarginRouter(marginRouter()).authorizedSwapT4ExactT(
targetAmount,
type(uint256).max,
tP.amms,
tP.inverseLiquidationTokens
);
return amounts[0];
}
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "./Roles.sol";
/// @title Role management behavior
/// Main characters are for service discovery
/// Whereas roles are for access control
contract RoleAware {
Roles public immutable roles;
mapping(uint256 => address) public mainCharacterCache;
mapping(address => mapping(uint256 => bool)) public roleCache;
constructor(address _roles) {
require(_roles != address(0), "Please provide valid roles address");
roles = Roles(_roles);
}
modifier noIntermediary() {
require(
msg.sender == tx.origin,
"Currently no intermediaries allowed for this function call"
);
_;
}
// @dev Throws if called by any account other than the owner or executor
modifier onlyOwnerExec() {
require(
owner() == msg.sender || executor() == msg.sender,
"Roles: caller is not the owner"
);
_;
}
modifier onlyOwnerExecDisabler() {
require(
owner() == msg.sender ||
executor() == msg.sender ||
disabler() == msg.sender,
"Caller is not the owner, executor or authorized disabler"
);
_;
}
modifier onlyOwnerExecActivator() {
require(
owner() == msg.sender ||
executor() == msg.sender ||
isTokenActivator(msg.sender),
"Caller is not the owner, executor or authorized activator"
);
_;
}
function updateRoleCache(uint256 role, address contr) public virtual {
roleCache[contr][role] = roles.getRole(role, contr);
}
function updateMainCharacterCache(uint256 role) public virtual {
mainCharacterCache[role] = roles.mainCharacters(role);
}
function owner() internal view returns (address) {
return roles.owner();
}
function executor() internal returns (address) {
return roles.executor();
}
function disabler() internal view returns (address) {
return mainCharacterCache[DISABLER];
}
function fund() internal view returns (address) {
return mainCharacterCache[FUND];
}
function lending() internal view returns (address) {
return mainCharacterCache[LENDING];
}
function marginRouter() internal view returns (address) {
return mainCharacterCache[MARGIN_ROUTER];
}
function crossMarginTrading() internal view returns (address) {
return mainCharacterCache[CROSS_MARGIN_TRADING];
}
function feeController() internal view returns (address) {
return mainCharacterCache[FEE_CONTROLLER];
}
function price() internal view returns (address) {
return mainCharacterCache[PRICE_CONTROLLER];
}
function admin() internal view returns (address) {
return mainCharacterCache[ADMIN];
}
function incentiveDistributor() internal view returns (address) {
return mainCharacterCache[INCENTIVE_DISTRIBUTION];
}
function tokenAdmin() internal view returns (address) {
return mainCharacterCache[TOKEN_ADMIN];
}
function isBorrower(address contr) internal view returns (bool) {
return roleCache[contr][BORROWER];
}
function isFundTransferer(address contr) internal view returns (bool) {
return roleCache[contr][FUND_TRANSFERER];
}
function isMarginTrader(address contr) internal view returns (bool) {
return roleCache[contr][MARGIN_TRADER];
}
function isFeeSource(address contr) internal view returns (bool) {
return roleCache[contr][FEE_SOURCE];
}
function isMarginCaller(address contr) internal view returns (bool) {
return roleCache[contr][MARGIN_CALLER];
}
function isLiquidator(address contr) internal view returns (bool) {
return roleCache[contr][LIQUIDATOR];
}
function isAuthorizedFundTrader(address contr)
internal
view
returns (bool)
{
return roleCache[contr][AUTHORIZED_FUND_TRADER];
}
function isIncentiveReporter(address contr) internal view returns (bool) {
return roleCache[contr][INCENTIVE_REPORTER];
}
function isTokenActivator(address contr) internal view returns (bool) {
return roleCache[contr][TOKEN_ACTIVATOR];
}
function isStakePenalizer(address contr) internal view returns (bool) {
return roleCache[contr][STAKE_PENALIZER];
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/access/Ownable.sol";
import "../interfaces/IDependencyController.sol";
// we chose not to go with an enum
// to make this list easy to extend
uint256 constant FUND_TRANSFERER = 1;
uint256 constant MARGIN_CALLER = 2;
uint256 constant BORROWER = 3;
uint256 constant MARGIN_TRADER = 4;
uint256 constant FEE_SOURCE = 5;
uint256 constant LIQUIDATOR = 6;
uint256 constant AUTHORIZED_FUND_TRADER = 7;
uint256 constant INCENTIVE_REPORTER = 8;
uint256 constant TOKEN_ACTIVATOR = 9;
uint256 constant STAKE_PENALIZER = 10;
uint256 constant FUND = 101;
uint256 constant LENDING = 102;
uint256 constant MARGIN_ROUTER = 103;
uint256 constant CROSS_MARGIN_TRADING = 104;
uint256 constant FEE_CONTROLLER = 105;
uint256 constant PRICE_CONTROLLER = 106;
uint256 constant ADMIN = 107;
uint256 constant INCENTIVE_DISTRIBUTION = 108;
uint256 constant TOKEN_ADMIN = 109;
uint256 constant DISABLER = 1001;
uint256 constant DEPENDENCY_CONTROLLER = 1002;
/// @title Manage permissions of contracts and ownership of everything
/// owned by a multisig wallet (0xEED9D1c6B4cdEcB3af070D85bfd394E7aF179CBd) during
/// beta and will then be transfered to governance
/// https://github.com/marginswap/governance
contract Roles is Ownable {
mapping(address => mapping(uint256 => bool)) public roles;
mapping(uint256 => address) public mainCharacters;
constructor() Ownable() {
// token activation from the get-go
roles[msg.sender][TOKEN_ACTIVATOR] = true;
}
/// @dev Throws if called by any account other than the owner.
modifier onlyOwnerExecDepController() {
require(
owner() == msg.sender ||
executor() == msg.sender ||
mainCharacters[DEPENDENCY_CONTROLLER] == msg.sender,
"Roles: caller is not the owner"
);
_;
}
function giveRole(uint256 role, address actor)
external
onlyOwnerExecDepController
{
roles[actor][role] = true;
}
function removeRole(uint256 role, address actor)
external
onlyOwnerExecDepController
{
roles[actor][role] = false;
}
function setMainCharacter(uint256 role, address actor)
external
onlyOwnerExecDepController
{
mainCharacters[role] = actor;
}
function getRole(uint256 role, address contr) external view returns (bool) {
return roles[contr][role];
}
/// @dev current executor
function executor() public returns (address exec) {
address depController = mainCharacters[DEPENDENCY_CONTROLLER];
if (depController != address(0)) {
exec = IDependencyController(depController).currentExecutor();
}
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
interface IDependencyController {
function currentExecutor() external returns (address);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;
interface IMarginTrading {
function registerDeposit(
address trader,
address token,
uint256 amount
) external returns (uint256 extinguishAmount);
function registerWithdrawal(
address trader,
address token,
uint256 amount
) external;
function registerBorrow(
address trader,
address token,
uint256 amount
) external;
function registerTradeAndBorrow(
address trader,
address inToken,
address outToken,
uint256 inAmount,
uint256 outAmount
) external returns (uint256 extinguishAmount, uint256 borrowAmount);
function registerOvercollateralizedBorrow(
address trader,
address depositToken,
uint256 depositAmount,
address borrowToken,
uint256 withdrawAmount
) external;
function registerLiquidation(address trader) external;
function getHoldingAmounts(address trader)
external
view
returns (
address[] memory holdingTokens,
uint256[] memory holdingAmounts
);
function getBorrowAmounts(address trader)
external
view
returns (address[] memory borrowTokens, uint256[] memory borrowAmounts);
}
pragma solidity >=0.5.0;
interface IWETH {
function deposit() external payable;
function transfer(address to, uint256 value) external returns (bool);
function withdraw(uint256) external;
}
pragma solidity >=0.5.0;
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol";
library UniswapStyleLib {
address constant UNISWAP_FACTORY =
0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f;
address constant SUSHI_FACTORY = 0xC0AEe478e3658e2610c5F7A4A2E1777cE9e4f2Ac;
// returns sorted token addresses, used to handle return values from pairs sorted in this order
function sortTokens(address tokenA, address tokenB)
internal
pure
returns (address token0, address token1)
{
require(tokenA != tokenB, "Identical address!");
(token0, token1) = tokenA < tokenB
? (tokenA, tokenB)
: (tokenB, tokenA);
require(token0 != address(0), "Zero address!");
}
// fetches and sorts the reserves for a pair
function getReserves(
address pair,
address tokenA,
address tokenB
) internal view returns (uint256 reserveA, uint256 reserveB) {
(address token0, ) = sortTokens(tokenA, tokenB);
(uint256 reserve0, uint256 reserve1, ) =
IUniswapV2Pair(pair).getReserves();
(reserveA, reserveB) = tokenA == token0
? (reserve0, reserve1)
: (reserve1, reserve0);
}
// given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) internal pure returns (uint256 amountOut) {
require(amountIn > 0, "INSUFFICIENT_INPUT_AMOUNT");
require(
reserveIn > 0 && reserveOut > 0,
"UniswapV2Library: INSUFFICIENT_LIQUIDITY"
);
uint256 amountInWithFee = amountIn * 997;
uint256 numerator = amountInWithFee * reserveOut;
uint256 denominator = reserveIn * 1_000 + amountInWithFee;
amountOut = numerator / denominator;
}
// given an output amount of an asset and pair reserves, returns a required input amount of the other asset
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) internal pure returns (uint256 amountIn) {
require(amountOut > 0, "INSUFFICIENT_OUTPUT_AMOUNT");
require(
reserveIn > 0 && reserveOut > 0,
"UniswapV2Library: INSUFFICIENT_LIQUIDITY"
);
uint256 numerator = reserveIn * amountOut * 1_000;
uint256 denominator = (reserveOut - amountOut) - 997;
amountIn = (numerator / denominator) + 1;
}
// performs chained getAmountOut calculations on any number of pairs
function getAmountsOut(
uint256 amountIn,
bytes32 amms,
address[] memory tokens
) internal view returns (uint256[] memory amounts, address[] memory pairs) {
require(tokens.length >= 2, "token path too short");
amounts = new uint256[](tokens.length);
amounts[0] = amountIn;
pairs = new address[](tokens.length - 1);
for (uint256 i; i < tokens.length - 1; i++) {
address inToken = tokens[i];
address outToken = tokens[i + 1];
address pair =
amms[i] == 0
? pairForUni(inToken, outToken)
: pairForSushi(inToken, outToken);
pairs[i] = pair;
(uint256 reserveIn, uint256 reserveOut) =
getReserves(pair, inToken, outToken);
amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
}
}
// performs chained getAmountIn calculations on any number of pairs
function getAmountsIn(
uint256 amountOut,
bytes32 amms,
address[] memory tokens
) internal view returns (uint256[] memory amounts, address[] memory pairs) {
require(tokens.length >= 2, "token path too short");
amounts = new uint256[](tokens.length);
amounts[amounts.length - 1] = amountOut;
pairs = new address[](tokens.length - 1);
for (uint256 i = tokens.length - 1; i > 0; i--) {
address inToken = tokens[i - 1];
address outToken = tokens[i];
address pair =
amms[i - 1] == 0
? pairForUni(inToken, outToken)
: pairForSushi(inToken, outToken);
pairs[i - 1] = pair;
(uint256 reserveIn, uint256 reserveOut) =
getReserves(pair, inToken, outToken);
amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
}
}
// calculates the CREATE2 address for a pair without making any external calls
function pairForUni(address tokenA, address tokenB)
internal
pure
returns (address pair)
{
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(
uint160(
uint256(
keccak256(
abi.encodePacked(
hex"ff",
UNISWAP_FACTORY,
keccak256(abi.encodePacked(token0, token1)),
hex"96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f" // init code hash
)
)
)
)
);
}
function pairForSushi(address tokenA, address tokenB)
internal
pure
returns (address pair)
{
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(
uint160(
uint256(
keccak256(
abi.encodePacked(
hex"ff",
SUSHI_FACTORY,
keccak256(abi.encodePacked(token0, token1)),
hex"e18a34eb0e04b04f7a0ac29a6e80748dca96319b42c54d679cb821dca90c6303" // init code hash
)
)
)
)
);
}
}
| @dev helper function does all the work of telling other contracts about a cross margin trade | function registerTrade(
address trader,
address inToken,
address outToken,
uint256 inAmount,
uint256 outAmount
) internal {
(uint256 extinguishAmount, uint256 borrowAmount) =
IMarginTrading(crossMarginTrading()).registerTradeAndBorrow(
trader,
inToken,
outToken,
inAmount,
outAmount
);
if (extinguishAmount > 0) {
Lending(lending()).payOff(outToken, extinguishAmount);
withdrawClaim(trader, outToken, extinguishAmount);
}
if (borrowAmount > 0) {
Lending(lending()).registerBorrow(inToken, borrowAmount);
stakeClaim(trader, inToken, borrowAmount);
}
emit AccountUpdated(trader);
}
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pragma solidity ^0.4.17;
contract Dots {
event Update();
struct Point {
address pointTakenBy; // player who put a point to this position
address territoryBelongsTo; // player who owns this territory
uint areaId;
}
uint currentMove;
address public player1;
address public player2;
address public currentPlayer;
address public winner;
bool public gameOver;
mapping (address => uint) public stakes;
mapping (address => bool) public drawOffers;
mapping (address => bool) public finishOffers;
int constant width = 20;
int constant height = 15;
Point[height][width] public field;
function Dots(address other) public payable {
player1 = msg.sender;
player2 = other;
require(player1 != player2);
currentPlayer = msg.sender;
winner = address(0);
gameOver = false;
stakes[player1] = 0;
stakes[player2] = 0;
drawOffers[player1] = false;
drawOffers[player2] = false;
}
// Game finishing negotiations
// ===========================
// Resign and give all stakes to the opponent.
function resign() public {
require(!gameOver && msg.sender == currentPlayer);
gameOver = true;
winner = msg.sender == player1 ? player2 : player1;
Update();
}
// Offer a draw. Players can only offer draws in theirs move.
function offerDraw() public {
require(!gameOver && msg.sender == currentPlayer);
drawOffers[msg.sender] = true;
if (drawOffers[player1] && drawOffers[player2]) {
gameOver = true;
winner = address(0);
Update();
}
}
// Revoke draw offer. Players can only revoke draw offers in theirs move.
function revokeDrawOffer() public {
require(!gameOver && msg.sender == currentPlayer);
drawOffers[msg.sender] = false;
}
// Offer to finish the game now and determine the winner following the
// game rules.
function offerFinish() public {
require(!gameOver && msg.sender == currentPlayer);
finishOffers[msg.sender] = true;
if (finishOffers[player1] && finishOffers[player2]) {
finishGameAndSetWinner();
Update();
}
}
// Revoke finish offer.
function revokeFinishOffer() public {
require(!gameOver && msg.sender == currentPlayer);
finishOffers[msg.sender] = false;
}
// Stakes control
// ==============
// Uncomment to enable stakes. Note: the frontend doesn't support this.
// Raise stake for this game. The other player will be forced to raise
// its stake or resign. Players can only raise in theirs move.
// function raise() public payable {
// require(!gameOver && msg.sender == currentPlayer);
//
// stakes[msg.sender] += msg.value;
// }
// Claim the reward.
// function withdraw() public returns (bool) {
// require(gameOver);
//
// uint amount = stakes[msg.sender];
//
// if (amount > 0) {
// stakes[msg.sender] = 0;
//
// if (!msg.sender.send(amount)) {
// stakes[msg.sender] = amount;
// return false;
// }
// }
//
// return true;
// }
// Public game logic interface
// ===========================
function getField() view public returns (Point[height][width]) {
return field;
}
// Make a move, i.e. place a new dot.
function move(int x, int y) public {
require(!gameOver && stakes[player1] == stakes[player2] && msg.sender == currentPlayer);
require(0 <= x && x < width);
require(0 <= y && y < height);
require(field[uint(x)][uint(y)].pointTakenBy == address(0) && field[uint(x)][uint(y)].territoryBelongsTo == address(0));
currentMove += 1;
field[uint(x)][uint(y)].pointTakenBy = msg.sender;
if (isLinePart(x, y)) {
maybeMarkCaptured(x + 1, y, msg.sender);
maybeMarkCaptured(x - 1, y, msg.sender);
maybeMarkCaptured(x, y + 1, msg.sender);
maybeMarkCaptured(x, y - 1, msg.sender);
}
if (field[uint(x)][uint(y)].territoryBelongsTo == address(0)) {
maybeMarkCaptured(x, y, msg.sender == player1 ? player2 : player1);
}
currentPlayer = msg.sender == player1 ? player2 : player1;
Update();
for (int x_ = 0; x_ < width; x_ += 1) {
for (int y_ = 0; y_ < height; y_ += 1) {
if (
field[uint(x_)][uint(y_)].territoryBelongsTo == address(0) &&
field[uint(x_)][uint(y_)].pointTakenBy == address(0)
) {
return;
}
}
}
finishGameAndSetWinner();
}
// Game logic
// ==========
// Finish game with a draw.
function finishGameWithNoWinner() internal {
require(!gameOver);
gameOver = true;
winner = address(0);
}
// Finish game and set winner.
function finishGameAndSetWinner() internal {
assert(!gameOver);
gameOver = true;
uint player1Score = 0;
uint player2Score = 0;
for (int x = 0; x < width; x += 1) {
for (int y = 0; y < height; y += 1) {
if (
field[uint(x)][uint(y)].territoryBelongsTo != address(0) &&
field[uint(x)][uint(y)].pointTakenBy != address(0) &&
field[uint(x)][uint(y)].territoryBelongsTo != field[uint(x)][uint(y)].pointTakenBy
) {
if (field[uint(x)][uint(y)].territoryBelongsTo == player1) {
player1Score += 1;
} else {
player2Score += 1;
}
}
}
}
if (player1Score > player2Score) {
winner = player1;
stakes[player1] += stakes[player2];
stakes[player2] = 0;
} else if (player2Score > player1Score) {
winner = player2;
stakes[player2] += stakes[player1];
stakes[player1] = 0;
} else {
winner = address(0);
}
}
// Check if point at the given coordinate is part of a line composed
// of points of the same size.
function isLinePart(int x, int y) internal view returns (bool) {
if (_isLinePart(x, y, x - 1, y - 1, x - 1, y + 1)) { return true; }
if (_isLinePart(x, y, x - 1, y - 1, x + 0, y + 1)) { return true; }
if (_isLinePart(x, y, x - 1, y - 1, x + 1, y - 1)) { return true; }
if (_isLinePart(x, y, x - 1, y - 1, x + 1, y + 0)) { return true; }
if (_isLinePart(x, y, x - 1, y - 1, x + 1, y + 1)) { return true; }
if (_isLinePart(x, y, x - 1, y + 0, x + 1, y - 1)) { return true; }
if (_isLinePart(x, y, x - 1, y + 0, x + 1, y + 0)) { return true; }
if (_isLinePart(x, y, x - 1, y + 0, x + 1, y + 1)) { return true; }
if (_isLinePart(x, y, x - 1, y + 1, x + 0, y - 1)) { return true; }
if (_isLinePart(x, y, x - 1, y + 1, x + 1, y - 1)) { return true; }
if (_isLinePart(x, y, x - 1, y + 1, x + 1, y + 0)) { return true; }
if (_isLinePart(x, y, x - 1, y + 1, x + 1, y + 1)) { return true; }
if (_isLinePart(x, y, x + 0, y - 1, x + 0, y + 1)) { return true; }
if (_isLinePart(x, y, x + 0, y - 1, x + 1, y + 1)) { return true; }
if (_isLinePart(x, y, x + 0, y + 1, x + 1, y - 1)) { return true; }
if (_isLinePart(x, y, x + 1, y - 1, x + 1, y + 1)) { return true; }
return false;
}
// Internal for isLinePart.
function _isLinePart(int x, int y, int x1, int y1, int x2, int y2) internal view returns (bool) {
return (
isOnMap(x, y) && isOnMap(x1, y1) && isOnMap(x2, y2) &&
field[uint(x1)][uint(y1)].pointTakenBy == field[uint(x)][uint(y)].pointTakenBy &&
field[uint(x2)][uint(y2)].pointTakenBy == field[uint(x)][uint(y)].pointTakenBy
);
}
// Check if this point is in the area encircled by the given player.
// If yes, mark new area of encirclement on the map.
function maybeMarkCaptured(int x, int y, address who) internal {
if (!isOnMap(x, y)) {
return;
}
address opponent = msg.sender == player1 ? player2 : player1;
bool[height][width] memory state;
for (int x_ = 0; x_ < width; x_ += 1) {
for (int y_ = 0; y_ < height; y_ += 1) {
state[uint(x_)][uint(y_)] = false;
}
}
if (!_maybeMarkCaptured(x, y, who, state)) {
return;
}
for (x_ = 0; x_ < width; x_ += 1) {
for (y_ = 0; y_ < height; y_ += 1) {
if (state[uint(x_)][uint(y_)] && field[uint(x_)][uint(y_)].pointTakenBy == opponent) {
for (x_ = 0; x_ < width; x_ += 1) {
for (y_ = 0; y_ < height; y_ += 1) {
if (state[uint(x_)][uint(y_)]) {
field[uint(x_)][uint(y_)].territoryBelongsTo = who;
field[uint(x_)][uint(y_)].areaId = currentMove;
}
}
}
return;
}
}
}
}
// Internal for maybeMarkCaptured. Returns true if the given area is captured.
function _maybeMarkCaptured(int x, int y, address who, bool[height][width] state) internal view returns (bool) {
if (!isOnMap(x, y)) {
return false;
}
if (state[uint(x)][uint(y)]) {
return true;
}
state[uint(x)][uint(y)] = true;
if (field[uint(x)][uint(y)].pointTakenBy == who && (field[uint(x)][uint(y)].territoryBelongsTo == who || field[uint(x)][uint(y)].territoryBelongsTo == address(0))) {
return true;
}
if(!_maybeMarkCaptured(x + 1, y, who, state)) {
return false;
}
if(!_maybeMarkCaptured(x - 1, y, who, state)) {
return false;
}
if(!_maybeMarkCaptured(x, y + 1, who, state)) {
return false;
}
if(!_maybeMarkCaptured(x, y - 1, who, state)) {
return false;
}
return true;
}
// Check if given coordinates fit within the map.
function isOnMap(int x, int y) internal pure returns (bool) {
return 0 <= x && x < width && 0 <= y && y < height;
}
}
// UID: 0x255a63a97e1c431ef29d4ee52110432b5fdbd8d6 0x604739053e48051413d6adf8b37170a63205c570
// personal.unlockAccount("0x255a63a97e1c431ef29d4ee52110432b5fdbd8d6", "", 1000000)
// personal.unlockAccount("0x604739053e48051413d6adf8b37170a63205c570", "", 1000000) | Check if given coordinates fit within the map. | function isOnMap(int x, int y) internal pure returns (bool) {
return 0 <= x && x < width && 0 <= y && y < height;
}
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// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;
import { ReentrancyGuard } from "./external/openzeppelin/ReentrancyGuard.sol";
import { StableMath } from "./libraries/StableMath.sol";
import { IERC20 } from "./interfaces/IERC20.sol";
import { Ownable } from "./abstract/Ownable.sol";
import { Lockable } from "./abstract/Lockable.sol";
/**
* @title SynapseVesting
* @notice Synapse Network Vesting contract
* @dev Vesting is constantly releasing tokens every block every second
*/
contract SynapseVesting is Ownable, Lockable, ReentrancyGuard {
using StableMath for uint256;
/// @notice address of Synapse Network token
address public snpToken;
/// @notice total tokens vested in contract
/// @dev tokens from not initialized sale contracts are not included
uint256 public totalVested;
/// @notice total tokens already claimed form vesting
uint256 public totalClaimed;
/// @notice staking contract address
/// @dev set by Owner, for claimAndStake
address public stakingAddress;
struct Vest {
uint256 dateStart; // start of claiming, can claim startTokens
uint256 dateEnd; // after it all tokens can be claimed
uint256 totalTokens; // total tokens to claim
uint256 startTokens; // tokens to claim on start
uint256 claimedTokens; // tokens already claimed
}
/// @notice storage of vestings
Vest[] internal vestings;
/// @notice map of vestings for user
mapping(address => uint256[]) internal user2vesting;
struct SaleContract {
address[] contractAddresses; // list of cross sale contracts from sale round
uint256 tokensPerCent; // amount of tokens per cent for sale round
uint256 maxAmount; // max amount in USD cents for sale round
uint256 percentOnStart; // percent of tokens to claim on start
uint256 startDate; // start of claiming, can claim start tokens
uint256 endDate; // after it all tokens can be claimed
}
/// @notice list of sale contract that will be checked
SaleContract[] internal saleContracts;
/// @notice map of users that initialized vestings from sale contracts
mapping(address => bool) public vestingAdded;
/// @notice map of users that were refunded after sales
mapping(address => bool) public refunded;
/// @dev events
event Claimed(address indexed user, uint256 amount);
event Vested(address indexed user, uint256 totalAmount, uint256 endDate);
/**
* @dev Contract initiator
* @param _token address of SNP token
*/
function init(address _token) external onlyOwner {
require(_token != address(0), "_token address cannot be 0");
require(snpToken == address(0), "Init already done");
snpToken = _token;
}
/**
* @dev Add multiple vesting to contract by arrays of data
* @param _users[] addresses of holders
* @param _startTokens[] tokens that can be withdrawn at startDate
* @param _totalTokens[] total tokens in vesting
* @param _startDate date from when tokens can be claimed
* @param _endDate date after which all tokens can be claimed
*/
function massAddHolders(
address[] calldata _users,
uint256[] calldata _startTokens,
uint256[] calldata _totalTokens,
uint256 _startDate,
uint256 _endDate
) external onlyOwner whenNotLocked {
uint256 len = _users.length; //cheaper to use one variable
require((len == _startTokens.length) && (len == _totalTokens.length), "data size mismatch");
require(_startDate < _endDate, "startDate cannot exceed endDate");
uint256 i;
for (i; i < len; i++) {
_addHolder(_users[i], _startTokens[i], _totalTokens[i], _startDate, _endDate);
}
}
/**
* @dev Add new vesting to contract
* @param _user address of a holder
* @param _startTokens how many tokens are claimable at start date
* @param _totalTokens total number of tokens in added vesting
* @param _startDate date from when tokens can be claimed
* @param _endDate date after which all tokens can be claimed
*/
function _addHolder(
address _user,
uint256 _startTokens,
uint256 _totalTokens,
uint256 _startDate,
uint256 _endDate
) internal {
require(_user != address(0), "user address cannot be 0");
Vest memory v;
v.startTokens = _startTokens;
v.totalTokens = _totalTokens;
v.dateStart = _startDate;
v.dateEnd = _endDate;
totalVested += _totalTokens;
vestings.push(v);
user2vesting[_user].push(vestings.length); // we are skipping index "0" for reasons
emit Vested(_user, _totalTokens, _endDate);
}
/**
* @dev Claim tokens from msg.sender vestings
*/
function claim() external {
_claim(msg.sender, msg.sender);
}
/**
* @dev Claim tokens from msg.sender vestings to external address
* @param _target transfer address for claimed tokens
*/
function claimTo(address _target) external {
_claim(msg.sender, _target);
}
/**
* @dev Claim and stake claimed tokens directly in staking contract
* Ask staking contract if user is not in withdrawing state
*/
function claimAndStake() external {
require(stakingAddress != address(0), "Staking contract not configured");
require(IStaking(stakingAddress).canStakeTokens(msg.sender), "Unable to stake");
uint256 amt = _claim(msg.sender, stakingAddress);
IStaking(stakingAddress).onClaimAndStake(msg.sender, amt);
}
/**
* @dev internal claim function
* @param _user address of holder
* @param _target where tokens should be send
* @return amt number of tokens claimed
*/
function _claim(address _user, address _target) internal nonReentrant returns (uint256 amt) {
require(_target != address(0), "Claim, then burn");
if (!vestingAdded[_user] && !refunded[_user]) {
_addVesting(_user);
}
uint256 len = user2vesting[_user].length;
require(len > 0, "No vestings for user");
uint256 cl;
uint256 i;
for (i; i < len; i++) {
Vest storage v = vestings[user2vesting[_user][i] - 1];
cl = _claimable(v);
v.claimedTokens += cl;
amt += cl;
}
if (amt > 0) {
totalClaimed += amt;
_transfer(_target, amt);
emit Claimed(_user, amt);
} else revert("Nothing to claim");
}
/**
* @dev Internal function to send out claimed tokens
* @param _user address that we send tokens
* @param _amt amount of tokens
*/
function _transfer(address _user, uint256 _amt) internal {
require(IERC20(snpToken).transfer(_user, _amt), "Token transfer failed");
}
/**
* @dev Count how many tokens can be claimed from vesting to date
* @param _vesting Vesting object
* @return canWithdraw number of tokens
*/
function _claimable(Vest memory _vesting) internal view returns (uint256 canWithdraw) {
uint256 currentTime = block.timestamp;
if (_vesting.dateStart > currentTime) return 0;
// we are somewhere in the middle
if (currentTime < _vesting.dateEnd) {
// how much time passed (as fraction * 10^18)
// timeRatio = (time passed * 1e18) / duration
uint256 timeRatio = (currentTime - _vesting.dateStart).divPrecisely(_vesting.dateEnd - _vesting.dateStart);
// how much tokens we can get in total to date
canWithdraw = (_vesting.totalTokens - _vesting.startTokens).mulTruncate(timeRatio) + _vesting.startTokens;
}
// time has passed, we can take all tokens
else {
canWithdraw = _vesting.totalTokens;
}
// but maybe we take something earlier?
canWithdraw -= _vesting.claimedTokens;
}
/**
* @dev Read number of claimable tokens by user and vesting no
* @param _user address of holder
* @param _id his vesting number (starts from 0)
* @return amount number of tokens
*/
function getClaimable(address _user, uint256 _id) external view returns (uint256 amount) {
amount = _claimable(vestings[user2vesting[_user][_id] - 1]);
}
/**
* @dev Read total amount of tokens that user can claim to date from all vestings
* Function also includes tokens to claim from sale contracts that were not
* yet initiated for user.
* @param _user address of holder
* @return amount number of tokens
*/
function getAllClaimable(address _user) public view returns (uint256 amount) {
uint256 len = user2vesting[_user].length;
uint256 i;
for (i; i < len; i++) {
amount += _claimable(vestings[user2vesting[_user][i] - 1]);
}
if (!vestingAdded[_user]) {
amount += _claimableFromSaleContracts(_user);
}
}
/**
* @dev Extract all the vestings for the user
* Also extract not initialized vestings from
* sale contracts.
* @param _user address of holder
* @return v array of Vest objects
*/
function getVestings(address _user) external view returns (Vest[] memory) {
// array of pending vestings
Vest[] memory pV;
if (!vestingAdded[_user]) {
pV = _vestingsFromSaleContracts(_user);
}
uint256 pLen = pV.length;
uint256 len = user2vesting[_user].length;
Vest[] memory v = new Vest[](len + pLen);
// copy normal vestings
uint256 i;
for (i; i < len; i++) {
v[i] = vestings[user2vesting[_user][i] - 1];
}
// copy not initialized vestings
if (!vestingAdded[_user]) {
uint256 j;
for (j; j < pLen; j++) {
v[i + j] = pV[j];
}
}
return v;
}
/**
* @dev Read total number of vestings registered
* @return number of registered vestings on contract
*/
function getVestingsCount() external view returns (uint256) {
return vestings.length;
}
/**
* @dev Read single registered vesting entry
* @param _id index of vesting in storage
* @return Vest object
*/
function getVestingByIndex(uint256 _id) external view returns (Vest memory) {
return vestings[_id];
}
/**
* @dev Read registered vesting list by range from-to
* @param _start first index
* @param _end last index
* @return array of Vest objects
*/
function getVestingsByRange(uint256 _start, uint256 _end) external view returns (Vest[] memory) {
uint256 cnt = _end - _start + 1;
uint256 len = vestings.length;
require(_end < len, "range error");
Vest[] memory v = new Vest[](cnt);
uint256 i;
for (i; i < cnt; i++) {
v[i] = vestings[_start + i];
}
return v;
}
/**
* @dev Extract all sale contracts
* @return array of SaleContract objects
*/
function getSaleContracts() external view returns (SaleContract[] memory) {
return saleContracts;
}
/**
* @dev Read total number of sale contracts
* @return number of SaleContracts
*/
function getSaleContractsCount() external view returns (uint256) {
return saleContracts.length;
}
/**
* @dev Read single sale contract entry
* @param _id index of sale contract in storage
* @return SaleContract object
*/
function getSaleContractByIndex(uint256 _id) external view returns (SaleContract memory) {
return saleContracts[_id];
}
/**
* @dev Register sale contract
* @param _contractAddresses addresses of sale contracts
* @param _tokensPerCent sale price
* @param _maxAmount the maximum amount in USD cents for which user could buy
* @param _percentOnStart percentage of vested coins that can be claimed on start date
* @param _startDate date when initial vesting can be released
* @param _endDate final date of vesting, where all tokens can be claimed
*/
function addSaleContract(
address[] memory _contractAddresses,
uint256 _tokensPerCent,
uint256 _maxAmount,
uint256 _percentOnStart,
uint256 _startDate,
uint256 _endDate
) external onlyOwner whenNotLocked {
require(_contractAddresses.length > 0, "data is missing");
require(_startDate < _endDate, "startDate cannot exceed endDate");
SaleContract memory s;
s.contractAddresses = _contractAddresses;
s.tokensPerCent = _tokensPerCent;
s.maxAmount = _maxAmount;
s.startDate = _startDate;
s.percentOnStart = _percentOnStart;
s.endDate = _endDate;
saleContracts.push(s);
}
/**
* @dev Initialize vestings from sale contracts for msg.sender
*/
function addMyVesting() external {
_addVesting(msg.sender);
}
/**
* @dev Initialize vestings from sale contracts for target user
* @param _user address of user that will be initialized
*/
function addVesting(address _user) external {
require(_user != address(0), "User address cannot be 0");
_addVesting(_user);
}
/**
* @dev Function iterate sale contracts and initialize corresponding
* vesting for user.
* @param _user address that will be initialized
*/
function _addVesting(address _user) internal {
require(!refunded[_user], "User refunded");
require(!vestingAdded[_user], "Already done");
uint256 len = saleContracts.length;
uint256 i;
for (i; i < len; i++) {
SaleContract memory s = saleContracts[i];
uint256 sLen = s.contractAddresses.length;
uint256 j;
uint256 amt;
for (j; j < sLen; j++) {
amt += ISaleContract(s.contractAddresses[j]).balanceOf(_user);
}
// amt is in cents, so $100 = 10000
if (amt > 0) {
if (amt > s.maxAmount) {
amt = s.maxAmount;
}
// create Vest object
Vest memory v = _vestFromSaleContractAndAmount(s, amt);
// update contract data
totalVested += v.totalTokens;
vestings.push(v);
user2vesting[_user].push(vestings.length);
emit Vested(_user, v.totalTokens, v.dateEnd);
}
}
vestingAdded[_user] = true;
}
/**
* @dev Function iterate sale contracts and count claimable amounts for given user.
* Used to calculate claimable amounts from not initialized vestings.
* @param _user address of user to count claimable
* @return claimable amount of tokens
*/
function _claimableFromSaleContracts(address _user) internal view returns (uint256 claimable) {
if (refunded[_user]) return 0;
uint256 len = saleContracts.length;
if (len == 0) return 0;
uint256 i;
for (i; i < len; i++) {
SaleContract memory s = saleContracts[i];
uint256 sLen = s.contractAddresses.length;
uint256 j;
uint256 amt;
for (j; j < sLen; j++) {
amt += ISaleContract(s.contractAddresses[j]).balanceOf(_user);
}
// amt is in cents, so $100 = 10000
if (amt > 0) {
if (amt > s.maxAmount) {
amt = s.maxAmount;
}
claimable += _claimable(_vestFromSaleContractAndAmount(s, amt));
}
}
}
/**
* @dev Function iterate sale contracts and extract not initialized user vestings.
* Used to return all stored and not initialized vestings.
* @param _user address of user to extract vestings
* @return v vesting array
*/
function _vestingsFromSaleContracts(address _user) internal view returns (Vest[] memory) {
uint256 len = saleContracts.length;
if (refunded[_user] || len == 0) return new Vest[](0);
Vest[] memory v = new Vest[](_numberOfVestingsFromSaleContracts(_user));
uint256 i;
uint256 idx;
for (i; i < len; i++) {
SaleContract memory s = saleContracts[i];
uint256 sLen = s.contractAddresses.length;
uint256 j;
uint256 amt;
for (j; j < sLen; j++) {
amt += ISaleContract(s.contractAddresses[j]).balanceOf(_user);
}
// amt is in cents, so $100 = 10000
if (amt > 0) {
if (amt > s.maxAmount) {
amt = s.maxAmount;
}
v[idx] = _vestFromSaleContractAndAmount(s, amt);
idx++;
}
}
return v;
}
/**
* @dev Function iterate sale contracts and return number of not initialized vestings for user.
* @param _user address of user to extract vestings
* @return number of not not initialized user vestings
*/
function _numberOfVestingsFromSaleContracts(address _user) internal view returns (uint256 number) {
uint256 len = saleContracts.length;
uint256 i;
for (i; i < len; i++) {
SaleContract memory s = saleContracts[i];
uint256 sLen = s.contractAddresses.length;
uint256 j;
uint256 amt;
for (j; j < sLen; j++) {
amt += ISaleContract(s.contractAddresses[j]).balanceOf(_user);
}
// amt is in cents, so $100 = 10000
if (amt > 0) {
number++;
}
}
}
/**
* @dev Return vesting created from given sale and usd cent amount.
* @param _sale address of user to extract vestings
* @param _amount address of user to extract vestings
* @return v vesting from given parameters
*/
function _vestFromSaleContractAndAmount(SaleContract memory _sale, uint256 _amount) internal pure returns (Vest memory v) {
v.dateStart = _sale.startDate;
v.dateEnd = _sale.endDate;
uint256 total = _amount * _sale.tokensPerCent;
v.totalTokens = total;
v.startTokens = (total * _sale.percentOnStart) / 100;
}
/**
* @dev Set staking contract address for Claim and Stake.
* Only contract owner can set.
* @param _staking address
*/
function setStakingAddress(address _staking) external onlyOwner {
stakingAddress = _staking;
}
/**
* @dev Mark user as refunded
* @param _user address of user
* @param _refunded true=refunded
*/
function setRefunded(address _user, bool _refunded) external onlyOwner whenNotLocked {
require(_user != address(0), "user address cannot be 0");
refunded[_user] = _refunded;
}
/**
* @dev Mark multiple refunded users
* @param _users[] addresses of refunded users
*/
function massSetRefunded(address[] calldata _users) external onlyOwner whenNotLocked {
uint256 i;
for (i; i < _users.length; i++) {
require(_users[i] != address(0), "user address cannot be 0");
refunded[_users[i]] = true;
}
}
/**
* @dev Recover ETH from contract to owner address.
*/
function recoverETH() external {
payable(owner).transfer(address(this).balance);
}
/**
* @dev Recover given ERC20 token from contract to owner address.
* Can't recover SNP tokens.
* @param _token address of ERC20 token to recover
*/
function recoverErc20(address _token) external {
require(_token != snpToken, "Not permitted");
uint256 amt = IERC20(_token).balanceOf(address(this));
require(amt > 0, "Nothing to recover");
IBadErc20(_token).transfer(owner, amt);
}
}
/**
* @title IStaking
* @dev Interface for claim and stake
*/
interface IStaking {
function canStakeTokens(address _account) external view returns (bool);
function onClaimAndStake(address _from, uint256 _amount) external;
}
/**
* @title ISaleContract
* @dev Interface for sale contract
*/
interface ISaleContract {
function balanceOf(address _account) external view returns (uint256);
}
/**
* @title IBadErc20
* @dev Interface for emergency recover any ERC20-tokens,
* even non-erc20-compliant like USDT not returning boolean
*/
interface IBadErc20 {
function transfer(address _recipient, uint256 _amount) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;
import { Ownable } from "./Ownable.sol";
abstract contract LockableData {
bool public locked;
}
abstract contract Lockable is LockableData, Ownable {
/**
* @dev Locks functions with whenNotLocked modifier
*/
function lock() external onlyOwner {
locked = true;
}
/**
* @dev Throws if called after it was locked.
*/
modifier whenNotLocked {
require(!locked, "Lockable: locked");
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;
abstract contract OwnableData {
address public owner;
address public pendingOwner;
}
abstract contract Ownable is OwnableData {
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev `owner` defaults to msg.sender on construction.
*/
constructor() {
_setOwner(msg.sender);
}
/**
* @dev Transfers ownership to `newOwner`. Either directly or claimable by the new pending owner.
* Can only be invoked by the current `owner`.
* @param _newOwner Address of the new owner.
* @param _direct True if `newOwner` should be set immediately. False if `newOwner` needs to use `claimOwnership`.
*/
function transferOwnership(address _newOwner, bool _direct) external onlyOwner {
if (_direct) {
require(_newOwner != address(0), "zero address");
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
pendingOwner = address(0);
} else {
pendingOwner = _newOwner;
}
}
/**
* @dev Needs to be called by `pendingOwner` to claim ownership.
*/
function claimOwnership() external {
address _pendingOwner = pendingOwner;
require(msg.sender == _pendingOwner, "caller != pending owner");
emit OwnershipTransferred(owner, _pendingOwner);
owner = _pendingOwner;
pendingOwner = address(0);
}
/**
* @dev Throws if called by any account other than the Owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "caller is not the owner");
_;
}
function _setOwner(address newOwner) internal {
address oldOwner = owner;
owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;
interface IERC20 {
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function balanceOf(address account) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 value) external returns (bool);
// EIP 2612
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
function nonces(address owner) external view returns (uint256);
function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;
function transferWithPermit(address target, address to, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external returns (bool);
}
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.8.6;
// Based on StableMath from mStable
// https://github.com/mstable/mStable-contracts/blob/master/contracts/shared/StableMath.sol
library StableMath {
/**
* @dev Scaling unit for use in specific calculations,
* where 1 * 10**18, or 1e18 represents a unit '1'
*/
uint256 private constant FULL_SCALE = 1e18;
/**
* @dev Provides an interface to the scaling unit
* @return Scaling unit (1e18 or 1 * 10**18)
*/
function getFullScale() internal pure returns (uint256) {
return FULL_SCALE;
}
/**
* @dev Scales a given integer to the power of the full scale.
* @param x Simple uint256 to scale
* @return Scaled value a to an exact number
*/
function scaleInteger(uint256 x) internal pure returns (uint256) {
return x * FULL_SCALE;
}
/***************************************
PRECISE ARITHMETIC
****************************************/
/**
* @dev Multiplies two precise units, and then truncates by the full scale
* @param x Left hand input to multiplication
* @param y Right hand input to multiplication
* @return Result after multiplying the two inputs and then dividing by the shared
* scale unit
*/
function mulTruncate(uint256 x, uint256 y) internal pure returns (uint256) {
return mulTruncateScale(x, y, FULL_SCALE);
}
/**
* @dev Multiplies two precise units, and then truncates by the given scale. For example,
* when calculating 90% of 10e18, (10e18 * 9e17) / 1e18 = (9e36) / 1e18 = 9e18
* @param x Left hand input to multiplication
* @param y Right hand input to multiplication
* @param scale Scale unit
* @return Result after multiplying the two inputs and then dividing by the shared
* scale unit
*/
function mulTruncateScale(
uint256 x,
uint256 y,
uint256 scale
) internal pure returns (uint256) {
// e.g. assume scale = fullScale
// z = 10e18 * 9e17 = 9e36
// return 9e36 / 1e18 = 9e18
return (x * y) / scale;
}
/**
* @dev Multiplies two precise units, and then truncates by the full scale, rounding up the result
* @param x Left hand input to multiplication
* @param y Right hand input to multiplication
* @return Result after multiplying the two inputs and then dividing by the shared
* scale unit, rounded up to the closest base unit.
*/
function mulTruncateCeil(uint256 x, uint256 y) internal pure returns (uint256) {
// e.g. 8e17 * 17268172638 = 138145381104e17
uint256 scaled = x * y;
// e.g. 138145381104e17 + 9.99...e17 = 138145381113.99...e17
uint256 ceil = scaled + FULL_SCALE - 1;
// e.g. 13814538111.399...e18 / 1e18 = 13814538111
return ceil / FULL_SCALE;
}
/**
* @dev Precisely divides two units, by first scaling the left hand operand. Useful
* for finding percentage weightings, i.e. 8e18/10e18 = 80% (or 8e17)
* @param x Left hand input to division
* @param y Right hand input to division
* @return Result after multiplying the left operand by the scale, and
* executing the division on the right hand input.
*/
function divPrecisely(uint256 x, uint256 y) internal pure returns (uint256) {
// e.g. 8e18 * 1e18 = 8e36
// e.g. 8e36 / 10e18 = 8e17
return (x * FULL_SCALE) / y;
}
/***************************************
HELPERS
****************************************/
/**
* @dev Calculates minimum of two numbers
* @param x Left hand input
* @param y Right hand input
* @return Minimum of the two inputs
*/
function min(uint256 x, uint256 y) internal pure returns (uint256) {
return x > y ? y : x;
}
/**
* @dev Calculated maximum of two numbers
* @param x Left hand input
* @param y Right hand input
* @return Maximum of the two inputs
*/
function max(uint256 x, uint256 y) internal pure returns (uint256) {
return x > y ? x : y;
}
/**
* @dev Clamps a value to an upper bound
* @param x Left hand input
* @param upperBound Maximum possible value to return
* @return Input x clamped to a maximum value, upperBound
*/
function clamp(uint256 x, uint256 upperBound) internal pure returns (uint256) {
return x > upperBound ? upperBound : x;
}
}
| * @dev Read total number of sale contracts @return number of SaleContracts/ | function getSaleContractsCount() external view returns (uint256) {
return saleContracts.length;
}
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// SPDX-License-Identifier: MIT
pragma solidity 0.6.8;
//
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
//
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
//
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
//
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
//
/**
* @title Initializable
*
* @dev Helper contract to support initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*
* Credit: https://github.com/OpenZeppelin/openzeppelin-upgrades/blob/master/packages/core/contracts/Initializable.sol
*/
contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private initializing;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
initialized = true;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
address self = address(this);
uint256 cs;
assembly { cs := extcodesize(self) }
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
//
/**
* @notice An account contracted created for each user address.
* @dev Anyone can directy deposit assets to the Account contract.
* @dev Only operators can withdraw asstes or perform operation from the Account contract.
*/
contract Account is Initializable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
/**
* @dev Asset is withdrawn from the Account.
*/
event Withdrawn(address indexed tokenAddress, address indexed targetAddress, uint256 amount);
/**
* @dev Spender is allowed to spend an asset.
*/
event Approved(address indexed tokenAddress, address indexed targetAddress, uint256 amount);
/**
* @dev A transaction is invoked on the Account.
*/
event Invoked(address indexed targetAddress, uint256 value, bytes data);
address public owner;
mapping(address => bool) public admins;
mapping(address => bool) public operators;
/**
* @dev Initializes the owner, admin and operator roles.
* @param _owner Address of the contract owner
* @param _initialAdmins The list of addresses that are granted the admin role.
*/
function initialize(address _owner, address[] memory _initialAdmins) public initializer {
owner = _owner;
// Grant the admin role to the initial admins
for (uint256 i = 0; i < _initialAdmins.length; i++) {
admins[_initialAdmins[i]] = true;
}
}
/**
* @dev Throws if called by any account that does not have operator role.
*/
modifier onlyOperator() {
require(isOperator(msg.sender), "not operator");
_;
}
/**
* @dev Transfers the ownership of the account to another address.
* The new owner can be an zero address which means renouncing the ownership.
* @param _owner New owner address
*/
function transferOwnership(address _owner) public {
require(msg.sender == owner, "not owner");
owner = _owner;
}
/**
* @dev Grants admin role to a new address.
* @param _account New admin address.
*/
function grantAdmin(address _account) public {
require(msg.sender == owner, "not owner");
require(!admins[_account], "already admin");
admins[_account] = true;
}
/**
* @dev Revokes the admin role from an address. Only owner can revoke admin.
* @param _account The admin address to revoke.
*/
function revokeAdmin(address _account) public {
require(msg.sender == owner, "not owner");
require(admins[_account], "not admin");
admins[_account] = false;
}
/**
* @dev Grants operator role to a new address. Only owner or admin can grant operator roles.
* @param _account The new operator address.
*/
function grantOperator(address _account) public {
require(msg.sender == owner || admins[msg.sender], "not admin");
require(!operators[_account], "already operator");
operators[_account] = true;
}
/**
* @dev Revoke operator role from an address. Only owner or admin can revoke operator roles.
* @param _account The operator address to revoke.
*/
function revokeOperator(address _account) public {
require(msg.sender == owner || admins[msg.sender], "not admin");
require(operators[_account], "not operator");
operators[_account] = false;
}
/**
* @dev Allows Account contract to receive ETH.
*/
receive() payable external {}
/**
* @dev Checks whether a user is an operator of the contract.
* Since admin role can grant operator role and owner can grant admin role, we treat both
* admins and owner as operators!
* @param userAddress Address to check whether it's an operator.
*/
function isOperator(address userAddress) public view returns (bool) {
return userAddress == owner || admins[userAddress] || operators[userAddress];
}
/**
* @dev Withdraws ETH from the Account contract. Only operators can withdraw ETH.
* @param targetAddress Address to send the ETH to.
* @param amount Amount of ETH to withdraw.
*/
function withdraw(address payable targetAddress, uint256 amount) public onlyOperator {
targetAddress.transfer(amount);
// Use address(-1) to represent ETH.
emit Withdrawn(address(-1), targetAddress, amount);
}
/**
* @dev Withdraws ERC20 token from the Account contract. Only operators can withdraw ERC20 tokens.
* @param tokenAddress Address of the ERC20 to withdraw.
* @param targetAddress Address to send the ERC20 to.
* @param amount Amount of ERC20 token to withdraw.
*/
function withdrawToken(address tokenAddress, address targetAddress, uint256 amount) public onlyOperator {
IERC20(tokenAddress).safeTransfer(targetAddress, amount);
emit Withdrawn(tokenAddress, targetAddress, amount);
}
/**
* @dev Withdraws ERC20 token from the Account contract. If the Account contract does not have sufficient balance,
* try to withdraw from the owner's address as well. This is useful if users wants to keep assets in their own wallet
* by setting adequate allowance to the Account contract.
* @param tokenAddress Address of the ERC20 to withdraw.
* @param targetAddress Address to send the ERC20 to.
* @param amount Amount of ERC20 token to withdraw.
*/
function withdrawTokenFallThrough(address tokenAddress, address targetAddress, uint256 amount) public onlyOperator {
uint256 tokenBalance = IERC20(tokenAddress).balanceOf(address(this));
// If we have enough token balance, send the token directly.
if (tokenBalance >= amount) {
IERC20(tokenAddress).safeTransfer(targetAddress, amount);
emit Withdrawn(tokenAddress, targetAddress, amount);
} else {
IERC20(tokenAddress).safeTransferFrom(owner, targetAddress, amount.sub(tokenBalance));
IERC20(tokenAddress).safeTransfer(targetAddress, tokenBalance);
emit Withdrawn(tokenAddress, targetAddress, amount);
}
}
/**
* @dev Allows the spender address to spend up to the amount of token.
* @param tokenAddress Address of the ERC20 that can spend.
* @param targetAddress Address which can spend the ERC20.
* @param amount Amount of ERC20 that can be spent by the target address.
*/
function approveToken(address tokenAddress, address targetAddress, uint256 amount) public onlyOperator {
IERC20(tokenAddress).safeApprove(targetAddress, 0);
IERC20(tokenAddress).safeApprove(targetAddress, amount);
emit Approved(tokenAddress, targetAddress, amount);
}
/**
* @notice Performs a generic transaction on the Account contract.
* @param target The address for the target contract.
* @param value The value of the transaction.
* @param data The data of the transaction.
*/
function invoke(address target, uint256 value, bytes memory data) public onlyOperator returns (bytes memory result) {
bool success;
(success, result) = target.call{value: value}(data);
if (!success) {
// solhint-disable-next-line no-inline-assembly
assembly {
returndatacopy(0, 0, returndatasize())
revert(0, returndatasize())
}
}
emit Invoked(target, value, data);
}
}
//
/**
* @title Proxy
* @dev Implements delegation of calls to other contracts, with proper
* forwarding of return values and bubbling of failures.
* It defines a fallback function that delegates all calls to the address
* returned by the abstract _implementation() internal function.
*
* Credit: https://github.com/OpenZeppelin/openzeppelin-sdk/blob/master/packages/lib/contracts/upgradeability/Proxy.sol
*/
abstract contract Proxy {
/**
* @dev Receive function.
* Implemented entirely in `_fallback`.
*/
receive () payable external {
_fallback();
}
/**
* @dev Fallback function.
* Implemented entirely in `_fallback`.
*/
fallback () payable external {
_fallback();
}
/**
* @return The Address of the implementation.
*/
function _implementation() internal virtual view returns (address);
/**
* @dev Delegates execution to an implementation contract.
* This is a low level function that doesn't return to its internal call site.
* It will return to the external caller whatever the implementation returns.
* @param implementation Address to delegate.
*/
function _delegate(address implementation) internal {
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize())
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize())
switch result
// delegatecall returns 0 on error.
case 0 { revert(0, returndatasize()) }
default { return(0, returndatasize()) }
}
}
/**
* @dev Function that is run as the first thing in the fallback function.
* Can be redefined in derived contracts to add functionality.
* Redefinitions must call super._willFallback().
*/
function _willFallback() internal virtual {
}
/**
* @dev fallback implementation.
* Extracted to enable manual triggering.
*/
function _fallback() internal {
_willFallback();
_delegate(_implementation());
}
}
//
/**
* @title BaseUpgradeabilityProxy
* @dev This contract implements a proxy that allows to change the
* implementation address to which it will delegate.
* Such a change is called an implementation upgrade.
*
* Credit: https://github.com/OpenZeppelin/openzeppelin-sdk/blob/master/packages/lib/contracts/upgradeability/BaseUpgradeabilityProxy.sol
*/
contract BaseUpgradeabilityProxy is Proxy {
/**
* @dev Emitted when the implementation is upgraded.
* @param implementation Address of the new implementation.
*/
event Upgraded(address indexed implementation);
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Returns the current implementation.
* @return impl Address of the current implementation
*/
function _implementation() internal override view returns (address impl) {
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
impl := sload(slot)
}
}
/**
* @dev Sets the implementation address of the proxy.
* @param newImplementation Address of the new implementation.
*/
function _setImplementation(address newImplementation) internal {
require(
Address.isContract(newImplementation),
"Implementation not set"
);
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
sstore(slot, newImplementation)
}
emit Upgraded(newImplementation);
}
}
//
/**
* @title AdminUpgradeabilityProxy
* @dev This contract combines an upgradeability proxy with an authorization
* mechanism for administrative tasks.
* All external functions in this contract must be guarded by the
* `ifAdmin` modifier. See ethereum/solidity#3864 for a Solidity
* feature proposal that would enable this to be done automatically.
* Credit: https://github.com/OpenZeppelin/openzeppelin-sdk/blob/master/packages/lib/contracts/upgradeability/BaseAdminUpgradeabilityProxy.sol
*/
contract AdminUpgradeabilityProxy is BaseUpgradeabilityProxy {
/**
* @dev Emitted when the administration has been transferred.
* @param previousAdmin Address of the previous admin.
* @param newAdmin Address of the new admin.
*/
event AdminChanged(address previousAdmin, address newAdmin);
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* Contract constructor.
* @param _logic address of the initial implementation.
* @param _admin Address of the proxy administrator.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
constructor(address _logic, address _admin) public payable {
assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
_setImplementation(_logic);
_setAdmin(_admin);
}
/**
* @dev Modifier to check whether the `msg.sender` is the admin.
* If it is, it will run the function. Otherwise, it will delegate the call
* to the implementation.
*/
modifier ifAdmin() {
if (msg.sender == _admin()) {
_;
} else {
_fallback();
}
}
/**
* @return The address of the proxy admin.
*/
function admin() external ifAdmin returns (address) {
return _admin();
}
/**
* @return The address of the implementation.
*/
function implementation() external ifAdmin returns (address) {
return _implementation();
}
/**
* @dev Changes the admin of the proxy.
* Only the current admin can call this function.
* @param newAdmin Address to transfer proxy administration to.
*/
function changeAdmin(address newAdmin) external ifAdmin {
emit AdminChanged(_admin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev Upgrade the backing implementation of the proxy.
* Only the admin can call this function.
* @param newImplementation Address of the new implementation.
*/
function changeImplementation(address newImplementation) external ifAdmin {
_setImplementation(newImplementation);
}
/**
* @return adm The admin slot.
*/
function _admin() internal view returns (address adm) {
bytes32 slot = ADMIN_SLOT;
assembly {
adm := sload(slot)
}
}
/**
* @dev Sets the address of the proxy admin.
* @param newAdmin Address of the new proxy admin.
*/
function _setAdmin(address newAdmin) internal {
bytes32 slot = ADMIN_SLOT;
assembly {
sstore(slot, newAdmin)
}
}
}
//
/**
* @notice Factory of Account contracts.
*/
contract AccountFactory {
/**
* @dev A new Account contract is created.
*/
event AccountCreated(address indexed userAddress, address indexed accountAddress);
address public governance;
address public accountBase;
mapping(address => address) public accounts;
/**
* @dev Constructor for Account Factory.
* @param _accountBase Base account implementation.
*/
constructor(address _accountBase) public {
require(_accountBase != address(0x0), "account base not set");
governance = msg.sender;
accountBase = _accountBase;
}
/**
* @dev Updates the base account implementation. Base account must be set.
*/
function setAccountBase(address _accountBase) public {
require(msg.sender == governance, "not governance");
require(_accountBase != address(0x0), "account base not set");
accountBase = _accountBase;
}
/**
* @dev Updates the govenance address. Governance can be empty address which means
* renouncing the governance.
*/
function setGovernance(address _governance) public {
require(msg.sender == governance, "not governance");
governance = _governance;
}
/**
* @dev Creates a new Account contract for the caller.
* Users can create multiple accounts by invoking this method multiple times. However,
* only the latest one is actively tracked and used by the platform.
* @param _initialAdmins The list of addresses that are granted the admin role.
*/
function createAccount(address[] memory _initialAdmins) public returns (Account) {
AdminUpgradeabilityProxy proxy = new AdminUpgradeabilityProxy(accountBase, msg.sender);
Account account = Account(address(proxy));
account.initialize(msg.sender, _initialAdmins);
accounts[msg.sender] = address(account);
emit AccountCreated(msg.sender, address(account));
return account;
}
}
//
/**
* @notice Interface for ERC20 token which supports minting new tokens.
*/
interface IERC20Mintable is IERC20 {
function mint(address _user, uint256 _amount) external;
}
//
/**
* @notice Interface for Strategies.
*/
interface IStrategy {
/**
* @dev Returns the token address that the strategy expects.
*/
function want() external view returns (address);
/**
* @dev Returns the total amount of tokens deposited in this strategy.
*/
function balanceOf() external view returns (uint256);
/**
* @dev Deposits the token to start earning.
*/
function deposit() external;
/**
* @dev Withdraws partial funds from the strategy.
*/
function withdraw(uint256 _amount) external;
/**
* @dev Withdraws all funds from the strategy.
*/
function withdrawAll() external returns (uint256);
/**
* @dev Claims yield and convert it back to want token.
*/
function harvest() external;
}
//
/**
* @notice Interface for controller.
*/
interface IController {
function rewardToken() external returns (address);
}
//
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
//
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
//
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
//
/**
* @notice YEarn's style vault which earns yield for a specific token.
*/
contract Vault is ERC20 {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
IERC20 public token;
address public governance;
address public strategy;
event Deposited(address indexed user, address indexed token, uint256 amount, uint256 shareAmount);
event Withdrawn(address indexed user, address indexed token, uint256 amount, uint256 shareAmount);
constructor(string memory _name, string memory _symbol, address _token) public ERC20(_name, _symbol) {
token = IERC20(_token);
governance = msg.sender;
}
/**
* @dev Returns the total balance in both vault and strategy.
*/
function balance() public view returns (uint256) {
return strategy == address(0x0) ? token.balanceOf(address(this)) :
token.balanceOf(address(this)).add(IStrategy(strategy).balanceOf());
}
/**
* @dev Updates the govenance address.
*/
function setGovernance(address _governance) public {
require(msg.sender == governance, "not governance");
governance = _governance;
}
/**
* @dev Updates the active strategy of the vault.
*/
function setStrategy(address _strategy) public {
require(msg.sender == governance, "not governance");
// This also ensures that _strategy must be a valid strategy contract.
require(address(token) == IStrategy(_strategy).want(), "different token");
// If the vault has an existing strategy, withdraw all funds from it.
if (strategy != address(0x0)) {
IStrategy(strategy).withdrawAll();
}
strategy = _strategy;
// Starts earning once a new strategy is set.
earn();
}
/**
* @dev Starts earning and deposits all current balance into strategy.
*/
function earn() public {
require(strategy != address(0x0), "no strategy");
uint256 _bal = token.balanceOf(address(this));
token.safeTransfer(strategy, _bal);
IStrategy(strategy).deposit();
}
/**
* @dev Deposits all balance to the vault.
*/
function depositAll() public virtual {
deposit(token.balanceOf(msg.sender));
}
/**
* @dev Deposit some balance to the vault.
*/
function deposit(uint256 _amount) public virtual {
require(_amount > 0, "zero amount");
uint256 _pool = balance();
uint256 _before = token.balanceOf(address(this));
token.safeTransferFrom(msg.sender, address(this), _amount);
uint256 _after = token.balanceOf(address(this));
_amount = _after.sub(_before); // Additional check for deflationary tokens
uint256 shares = 0;
if (totalSupply() == 0) {
shares = _amount;
} else {
shares = (_amount.mul(totalSupply())).div(_pool);
}
_mint(msg.sender, shares);
emit Deposited(msg.sender, address(token), _amount, shares);
}
/**
* @dev Withdraws all balance out of the vault.
*/
function withdrawAll() public virtual {
withdraw(balanceOf(msg.sender));
}
/**
* @dev Withdraws some balance out of the vault.
*/
function withdraw(uint256 _shares) public virtual {
require(_shares > 0, "zero amount");
uint256 r = (balance().mul(_shares)).div(totalSupply());
_burn(msg.sender, _shares);
// Check balance
uint256 b = token.balanceOf(address(this));
if (b < r) {
uint256 _withdraw = r.sub(b);
// Ideally this should not happen. Put here for extra safety.
require(strategy != address(0x0), "no strategy");
IStrategy(strategy).withdraw(_withdraw);
uint256 _after = token.balanceOf(address(this));
uint256 _diff = _after.sub(b);
if (_diff < _withdraw) {
r = b.add(_diff);
}
}
token.safeTransfer(msg.sender, r);
emit Withdrawn(msg.sender, address(token), r, _shares);
}
/**
* @dev Used to salvage any token deposited into the vault by mistake.
* @param _tokenAddress Token address to salvage.
* @param _amount Amount of token to salvage.
*/
function salvage(address _tokenAddress, uint256 _amount) public {
require(msg.sender == governance, "not governance");
require(_tokenAddress != address(token), "cannot salvage");
require(_amount > 0, "zero amount");
IERC20(_tokenAddress).safeTransfer(governance, _amount);
}
/**
* @dev Returns the number of vault token per share is worth.
*/
function getPricePerFullShare() public view returns (uint256) {
if (totalSupply() == 0) return 0;
return balance().mul(1e18).div(totalSupply());
}
}
//
/**
* @notice A vault with rewards.
*/
contract RewardedVault is Vault {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
address public controller;
uint256 public constant DURATION = 7 days; // Rewards are vested for a fixed duration of 7 days.
uint256 public periodFinish = 0;
uint256 public rewardRate = 0;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
mapping(address => uint256) public claims;
event RewardAdded(address indexed rewardToken, uint256 rewardAmount);
event RewardPaid(address indexed rewardToken, address indexed user, uint256 rewardAmount);
constructor(string memory _name, string memory _symbol, address _controller, address _vaultToken) public Vault(_name, _symbol, _vaultToken) {
require(_controller != address(0x0), "controller not set");
controller = _controller;
}
/**
* @dev Updates the controller address. Controller is responsible for reward distribution.
*/
function setController(address _controller) public {
require(msg.sender == governance, "not governance");
require(_controller != address(0x0), "controller not set");
controller = _controller;
}
modifier updateReward(address _account) {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (_account != address(0)) {
rewards[_account] = earned(_account);
userRewardPerTokenPaid[_account] = rewardPerTokenStored;
}
_;
}
function lastTimeRewardApplicable() public view returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}
function rewardPerToken() public view returns (uint256) {
if (totalSupply() == 0) {
return rewardPerTokenStored;
}
return
rewardPerTokenStored.add(
lastTimeRewardApplicable()
.sub(lastUpdateTime)
.mul(rewardRate)
.mul(1e18)
.div(totalSupply())
);
}
function earned(address _account) public view returns (uint256) {
return
balanceOf(_account)
.mul(rewardPerToken().sub(userRewardPerTokenPaid[_account]))
.div(1e18)
.add(rewards[_account]);
}
function deposit(uint256 _amount) public virtual override updateReward(msg.sender) {
super.deposit(_amount);
}
function depositAll() public virtual override updateReward(msg.sender) {
super.depositAll();
}
function withdraw(uint256 _shares) public virtual override updateReward(msg.sender) {
super.withdraw(_shares);
}
function withdrawAll() public virtual override updateReward(msg.sender) {
super.withdrawAll();
}
/**
* @dev Withdraws all balance and all rewards from the vault.
*/
function exit() external {
withdrawAll();
claimReward();
}
/**
* @dev Claims all rewards from the vault.
*/
function claimReward() public updateReward(msg.sender) returns (uint256) {
uint256 reward = earned(msg.sender);
if (reward > 0) {
claims[msg.sender] = claims[msg.sender].add(reward);
rewards[msg.sender] = 0;
address rewardToken = IController(controller).rewardToken();
IERC20(rewardToken).safeTransfer(msg.sender, reward);
emit RewardPaid(rewardToken, msg.sender, reward);
}
return reward;
}
/**
* @dev Notifies the vault that new reward is added. All rewards will be distributed linearly in 7 days.
* @param _reward Amount of reward token to add.
*/
function notifyRewardAmount(uint256 _reward) public updateReward(address(0)) {
require(msg.sender == controller, "not controller");
if (block.timestamp >= periodFinish) {
rewardRate = _reward.div(DURATION);
} else {
uint256 remaining = periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(rewardRate);
rewardRate = _reward.add(leftover).div(DURATION);
}
lastUpdateTime = block.timestamp;
periodFinish = block.timestamp.add(DURATION);
emit RewardAdded(IController(controller).rewardToken(), _reward);
}
}
//
/**
* @notice Controller for vaults.
*/
contract Controller is IController {
using SafeMath for uint256;
address public override rewardToken;
address public governance;
address public reserve;
uint256 public numVaults;
mapping(uint256 => address) public vaults;
constructor(address _rewardToken) public {
require(_rewardToken != address(0x0), "reward token not set");
governance = msg.sender;
reserve = msg.sender;
rewardToken = _rewardToken;
}
/**
* @dev Updates the govenance address.
*/
function setGovernance(address _governance) public {
require(msg.sender == governance, "not governance");
governance = _governance;
}
/**
* @dev Updates the rewards token.
*/
function setRewardToken(address _rewardToken) public {
require(msg.sender == governance, "not governance");
require(_rewardToken != address(0x0), "reward token not set");
rewardToken = _rewardToken;
}
/**
* @dev Updates the reserve address.
*/
function setReserve(address _reserve) public {
require(msg.sender == governance, "not governance");
require(_reserve != address(0x0), "reserve not set");
reserve = _reserve;
}
/**
* @dev Add a new vault to the controller.
*/
function addVault(address _vault) public {
require(msg.sender == governance, "not governance");
require(_vault != address(0x0), "vault not set");
vaults[numVaults++] = _vault;
}
/**
* @dev Add new rewards to a rewarded vault.
* @param _vaultId ID of the vault to have reward.
* @param _rewardAmount Amount of the reward token to add.
*/
function addRewards(uint256 _vaultId, uint256 _rewardAmount) public {
require(msg.sender == governance, "not governance");
require(vaults[_vaultId] != address(0x0), "vault not exist");
require(_rewardAmount > 0, "zero amount");
address vault = vaults[_vaultId];
IERC20Mintable(rewardToken).mint(vault, _rewardAmount);
// Mint 40% of tokens to governance.
IERC20Mintable(rewardToken).mint(reserve, _rewardAmount.mul(2).div(5));
RewardedVault(vault).notifyRewardAmount(_rewardAmount);
}
/**
* @dev Helpher function to earn in the vault.
* @param _vaultId ID of the vault to earn.
*/
function earn(uint256 _vaultId) public {
require(vaults[_vaultId] != address(0x0), "vault not exist");
RewardedVault(vaults[_vaultId]).earn();
}
/**
* @dev Helper function to earn in all vaults.
*/
function earnAll() public {
for (uint256 i = 0; i < numVaults; i++) {
RewardedVault(vaults[i]).earn();
}
}
/**
* @dev Helper function to harvest in the vault.
* @param _vaultId ID of the vault to harvest.
*/
function harvest(uint256 _vaultId) public {
require(vaults[_vaultId] != address(0x0), "vault not exist");
address strategy = RewardedVault(vaults[_vaultId]).strategy();
if (strategy != address(0x0)) {
IStrategy(strategy).harvest();
}
}
/**
* @dev Helper function to harvest in all vaults.
*/
function harvestAll() public {
for (uint256 i = 0; i < numVaults; i++) {
address strategy = RewardedVault(vaults[i]).strategy();
if (strategy != address(0x0)) {
IStrategy(strategy).harvest();
}
}
}
}
//
/**
* @dev Application to help stake and get rewards.
*/
contract StakingApplication {
using SafeMath for uint256;
event Staked(address indexed staker, uint256 indexed vaultId, address indexed token, uint256 amount);
event Unstaked(address indexed staker, uint256 indexed vaultId, address indexed token, uint256 amount);
event Claimed(address indexed staker, uint256 indexed vaultId, address indexed token, uint256 amount);
address public governance;
address public accountFactory;
Controller public controller;
constructor(address _accountFactory, address _controller) public {
require(_accountFactory != address(0x0), "account factory not set");
require(_controller != address(0x0), "controller not set");
governance = msg.sender;
accountFactory = _accountFactory;
controller = Controller(_controller);
}
/**
* @dev Updates the govenance address.
*/
function setGovernance(address _governance) public {
require(msg.sender == governance, "not governance");
governance = _governance;
}
/**
* @dev Updates the account factory.
*/
function setAccountFactory(address _accountFactory) public {
require(msg.sender == governance, "not governance");
require(_accountFactory != address(0x0), "account factory not set");
accountFactory = _accountFactory;
}
/**
* @dev Updates the controller address.
*/
function setController(address _controller) public {
require(msg.sender == governance, "not governance");
require(_controller != address(0x0), "controller not set");
controller = Controller(_controller);
}
/**
* @dev Retrieve the active account of the user.
*/
function _getAccount() internal view returns (Account) {
address _account = AccountFactory(accountFactory).accounts(msg.sender);
require(_account != address(0x0), "no account");
Account account = Account(payable(_account));
require(account.isOperator(address(this)), "not operator");
return account;
}
/**
* @dev Stake token into rewarded vault.
* @param _vaultId ID of the vault to stake.
* @param _amount Amount of token to stake.
*/
function stake(uint256 _vaultId, uint256 _amount) public {
address _vault = controller.vaults(_vaultId);
require(_vault != address(0x0), "no vault");
require(_amount > 0, "zero amount");
Account account = _getAccount();
RewardedVault vault = RewardedVault(_vault);
IERC20 token = vault.token();
account.approveToken(address(token), address(vault), _amount);
bytes memory methodData = abi.encodeWithSignature("deposit(uint256)", _amount);
account.invoke(address(vault), 0, methodData);
emit Staked(msg.sender, _vaultId, address(token), _amount);
}
/**
* @dev Unstake token out of RewardedVault.
* @param _vaultId ID of the vault to unstake.
* @param _amount Amount of token to unstake.
*/
function unstake(uint256 _vaultId, uint256 _amount) public {
address _vault = controller.vaults(_vaultId);
require(_vault != address(0x0), "no vault");
require(_amount > 0, "zero amount");
Account account = _getAccount();
RewardedVault vault = RewardedVault(_vault);
IERC20 token = vault.token();
// Important: Need to convert token amount to vault share!
uint256 totalBalance = vault.balance();
uint256 totalSupply = vault.totalSupply();
uint256 shares = _amount.mul(totalSupply).div(totalBalance);
bytes memory methodData = abi.encodeWithSignature("withdraw(uint256)", shares);
account.invoke(address(vault), 0, methodData);
emit Unstaked(msg.sender, _vaultId, address(token), _amount);
}
/**
* @dev Unstake all token out of RewardedVault.
* @param _vaultId ID of the vault to unstake.
*/
function unstakeAll(uint256 _vaultId) public {
address _vault = controller.vaults(_vaultId);
require(_vault != address(0x0), "no vault");
Account account = _getAccount();
RewardedVault vault = RewardedVault(_vault);
IERC20 token = vault.token();
uint256 totalBalance = vault.balance();
uint256 totalSupply = vault.totalSupply();
uint256 shares = vault.balanceOf(address(account));
uint256 amount = shares.mul(totalBalance).div(totalSupply);
bytes memory methodData = abi.encodeWithSignature("withdraw(uint256)", shares);
account.invoke(address(vault), 0, methodData);
emit Unstaked(msg.sender, _vaultId, address(token), amount);
}
/**
* @dev Claims rewards from RewardedVault.
* @param _vaultId ID of the vault to unstake.
*/
function claimRewards(uint256 _vaultId) public {
address _vault = controller.vaults(_vaultId);
require(_vault != address(0x0), "no vault");
Account account = _getAccount();
RewardedVault vault = RewardedVault(_vault);
IERC20 rewardToken = IERC20(controller.rewardToken());
bytes memory methodData = abi.encodeWithSignature("claimReward()");
bytes memory methodResult = account.invoke(address(vault), 0, methodData);
uint256 claimAmount = abi.decode(methodResult, (uint256));
emit Claimed(msg.sender, _vaultId, address(rewardToken), claimAmount);
}
/**
* @dev Retrieves the amount of token staked in RewardedVault.
* @param _vaultId ID of the vault to unstake.
*/
function getStakeBalance(uint256 _vaultId) public view returns (uint256) {
address _vault = controller.vaults(_vaultId);
require(_vault != address(0x0), "no vault");
address account = AccountFactory(accountFactory).accounts(msg.sender);
require(account != address(0x0), "no account");
RewardedVault vault = RewardedVault(_vault);
uint256 totalBalance = vault.balance();
uint256 totalSupply = vault.totalSupply();
uint256 share = vault.balanceOf(account);
return totalBalance.mul(share).div(totalSupply);
}
/**
* @dev Returns the total balance of the vault.
*/
function getVaultBalance(uint256 _vaultId) public view returns (uint256) {
address _vault = controller.vaults(_vaultId);
require(_vault != address(0x0), "no vault");
RewardedVault vault = RewardedVault(_vault);
return vault.balance();
}
/**
* @dev Return the amount of unclaim rewards.
* @param _vaultId ID of the vault to unstake.
*/
function getUnclaimedReward(uint256 _vaultId) public view returns (uint256) {
address _vault = controller.vaults(_vaultId);
require(_vault != address(0x0), "no vault");
address account = AccountFactory(accountFactory).accounts(msg.sender);
require(account != address(0x0), "no account");
return RewardedVault(_vault).earned(account);
}
/**
* @dev Return the amount of claim rewards.
* @param _vaultId ID of the vault to unstake.
*/
function getClaimedReward(uint256 _vaultId) public view returns (uint256) {
address _vault = controller.vaults(_vaultId);
require(_vault != address(0x0), "no vault");
address account = AccountFactory(accountFactory).accounts(msg.sender);
require(account != address(0x0), "no account");
return RewardedVault(_vault).claims(account);
}
} | * @dev Transfers the ownership of the account to another address. The new owner can be an zero address which means renouncing the ownership. @param _owner New owner address/ | function transferOwnership(address _owner) public {
require(msg.sender == owner, "not owner");
owner = _owner;
}
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v4.2/contracts/token/ERC20/IERC20.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v4.2/contracts/token/ERC20/utils/SafeERC20.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v4.2/contracts/utils/math/SafeMath.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v4.2/contracts/access/Ownable.sol";
import "./HE3.sol";
contract HE3Pools is Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
// Info of each user.
struct UserInfo {
uint256 amount; // How many LP tokens the user has provided.
uint256 rewardDebt; // Reward debt. See explanation below.
uint256 totalReward; // the total number the user reward.
bool isMigration; // token migration flag.
}
// Info of each pool.
struct PoolInfo {
IERC20 lpToken; // Address of LP token contract.
uint256 totalLp; // total token of lpToken.
uint256 allocPoint; // How many allocation points assigned to this pool. he3s to distribute per block.
uint256 lastRewardSecond; // Last block number that he3s distribution occurs.
uint256 accHe3PerShare; // Accumulated he3s per share, times 1e12. See below.
uint256 totalHE3Mint; // the total number of he3 mint.
uint256 timestamp; // the time of the pool start mining.
}
// The HE3 TOKEN!
HE3Token public he3;
// HE3 tokens created per Second, needs to div 1e18.
uint256 public he3PerSecond;
// Info of each pool.
PoolInfo[] public poolInfo;
// Info of each user that stakes LP tokens.
mapping(uint256 => mapping(address => UserInfo)) public userInfo;
// Total allocation poitns. Must be the sum of all allocation points in all pools.
uint256 public totalAllocPoint = 0;
// migration end block.
uint256 public migrationEndBlock;
// mint limit.
uint256 public totalMint;
// current mint.
uint256 public currentMint;
event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
event Withdraw(address indexed user, uint256 indexed pid, uint256 income);
event WithdrawPrincipal(address indexed user, uint256 indexed pid, uint256 amount, uint256 income);
event Migration(address[] dests, uint256[] values);
constructor(
HE3Token _he3,
uint256 _he3PerSecond,
uint256 _migrationBlockNums,
uint256 _totalMint,
uint256 _initMint
) {
he3 = _he3;
he3PerSecond = _he3PerSecond;
migrationEndBlock = block.number.add(_migrationBlockNums);
totalMint = _totalMint.mul(1e18);
currentMint = _initMint.mul(1e18);
}
function poolLength() external view returns (uint256) {
return poolInfo.length;
}
// Add a new lp to the pool. Can only be called by the owner.
function add(
uint256 _allocPoint,
IERC20 _lpToken,
bool _withUpdate
) public onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
totalAllocPoint = totalAllocPoint.add(_allocPoint);
poolInfo.push(
PoolInfo({
lpToken: _lpToken,
totalLp: 0,
allocPoint: _allocPoint,
lastRewardSecond: block.timestamp,
accHe3PerShare: 0,
totalHE3Mint: 0,
timestamp: 0
})
);
}
// Update the given pool's HE3 allocation point. Can only be called by the owner.
function set(
uint256 _pid,
uint256 _allocPoint,
bool _withUpdate
) public onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(
_allocPoint
);
poolInfo[_pid].allocPoint = _allocPoint;
}
// View function to see pending HE3s on frontend.
function pendingHe3(uint256 _pid, address _user)
external
view
returns (uint256)
{
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
uint256 accHe3PerShare = pool.accHe3PerShare;
uint256 lpSupply = pool.totalLp;
if (block.timestamp > pool.lastRewardSecond && lpSupply != 0) {
uint256 multiplier =
block.timestamp.sub(pool.lastRewardSecond);
uint256 he3Reward =
multiplier.mul(he3PerSecond).mul(pool.allocPoint).div(
totalAllocPoint
);
if ( currentMint.add(he3Reward) > totalMint) {
he3Reward = totalMint.sub(currentMint);
}
accHe3PerShare = accHe3PerShare.add(
he3Reward.mul(1e12).div(lpSupply)
);
}
return user.amount.mul(accHe3PerShare).div(1e12).sub(user.rewardDebt);
}
// Update reward vairables for all pools. Be careful of gas spending!
function massUpdatePools() public {
uint256 length = poolInfo.length;
for (uint256 pid = 0; pid < length; ++pid) {
updatePool(pid);
}
}
// Update reward variables of the given pool to be up-to-date.
function updatePool(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
if (block.timestamp <= pool.lastRewardSecond) {
return;
}
if (currentMint == totalMint) {
return;
}
uint256 lpSupply = pool.totalLp;
if (lpSupply == 0) {
pool.lastRewardSecond = block.timestamp;
return;
}
uint256 multiplier =
block.timestamp.sub(pool.lastRewardSecond);
uint256 he3Reward =
multiplier.mul(he3PerSecond).mul(pool.allocPoint).div(
totalAllocPoint
);
if ( currentMint.add(he3Reward) > totalMint) {
he3Reward = totalMint.sub(currentMint);
}
currentMint = currentMint.add(he3Reward);
he3.mint(address(this), he3Reward);
pool.totalHE3Mint = pool.totalHE3Mint.add(he3Reward);
pool.accHe3PerShare = pool.accHe3PerShare.add(
he3Reward.mul(1e12).div(lpSupply)
);
pool.lastRewardSecond = block.timestamp;
}
// Deposit LP tokens to Pools for mining HE3.
function deposit(uint256 _pid, uint256 _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
updatePool(_pid);
uint256 pending = 0;
if (user.amount > 0) {
pending =
user.amount.mul(pool.accHe3PerShare).div(1e12).sub(
user.rewardDebt
);
}
if (pool.timestamp == 0) {
pool.timestamp = block.timestamp;
}
pool.lpToken.safeTransferFrom(
address(msg.sender),
address(this),
_amount
);
user.amount = user.amount.add(_amount);
user.rewardDebt = user.amount.mul(pool.accHe3PerShare).div(1e12).sub(pending);
pool.totalLp = pool.totalLp.add(_amount);
emit Deposit(msg.sender, _pid, _amount);
}
// Withdraw reward from HE3Pools.
function withdraw(uint256 _pid, uint _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
updatePool(_pid);
uint256 pending =
user.amount.mul(pool.accHe3PerShare).div(1e12).sub(
user.rewardDebt
);
require(_amount <= pending, "_amount error.");
safeHe3Transfer(msg.sender, _amount);
user.totalReward = user.totalReward.add(_amount);
user.rewardDebt = user.rewardDebt.add(_amount);
emit Withdraw(msg.sender, _pid, _amount);
}
// Withdraw principal tokens from HE3Pools.
function withdrawPrincipal(uint256 _pid, uint256 _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
require(user.amount >= _amount, "withdraw: not good");
require(pool.lpToken != he3, "withdraw: not good");
updatePool(_pid);
uint256 pending =
user.amount.mul(pool.accHe3PerShare).div(1e12).sub(
user.rewardDebt
);
safeHe3Transfer(msg.sender, pending);
user.totalReward = user.totalReward.add(pending);
user.amount = user.amount.sub(_amount);
pool.totalLp = pool.totalLp.sub(_amount);
user.rewardDebt = user.amount.mul(pool.accHe3PerShare).div(1e12);
pool.lpToken.safeTransfer(address(msg.sender), _amount);
emit WithdrawPrincipal(msg.sender, _pid, _amount, pending);
}
// Safe he3 transfer function, just in case if rounding error causes pool to not have enough HE3s.
function safeHe3Transfer(address _to, uint256 _amount) internal {
uint256 he3Bal = he3.balanceOf(address(this));
if (_amount > he3Bal) {
he3.transfer(_to, he3Bal);
} else {
he3.transfer(_to, _amount);
}
}
// Token migration from ethereum for user
function migration(address[] memory dests, uint256[] memory values) onlyOwner public returns (uint256) {
uint256 i = 0;
require(block.number < migrationEndBlock, "bad time.");
require(dests.length == values.length, "bad length");
updatePool(0);
PoolInfo storage pool = poolInfo[0];
if (pool.timestamp == 0) {
pool.timestamp = block.timestamp;
}
while (i < dests.length) {
UserInfo storage user = userInfo[0][dests[i]];
if (user.isMigration == false) {
user.amount = user.amount.add(values[i]);
user.rewardDebt = user.rewardDebt.add(values[i].mul(pool.accHe3PerShare).div(1e12));
user.isMigration = true;
pool.totalLp = pool.totalLp.add(values[i]);
}
i += 1;
}
emit Migration(dests, values);
return(i);
}
}
| Update reward variables of the given pool to be up-to-date. | function updatePool(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
if (block.timestamp <= pool.lastRewardSecond) {
return;
}
if (currentMint == totalMint) {
return;
}
uint256 lpSupply = pool.totalLp;
if (lpSupply == 0) {
pool.lastRewardSecond = block.timestamp;
return;
}
uint256 multiplier =
block.timestamp.sub(pool.lastRewardSecond);
uint256 he3Reward =
multiplier.mul(he3PerSecond).mul(pool.allocPoint).div(
totalAllocPoint
);
if ( currentMint.add(he3Reward) > totalMint) {
he3Reward = totalMint.sub(currentMint);
}
currentMint = currentMint.add(he3Reward);
he3.mint(address(this), he3Reward);
pool.totalHE3Mint = pool.totalHE3Mint.add(he3Reward);
pool.accHe3PerShare = pool.accHe3PerShare.add(
he3Reward.mul(1e12).div(lpSupply)
);
pool.lastRewardSecond = block.timestamp;
}
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./partial_match/1/0x9CE7448986B77C20Ac309a3cBda3f5FC4c0f4A72/sources/WheatFarm.sol | solhint-disable-next-line no-inline-assembly | $WHEAT is the governance token of the protocol, functions include voting on updates to smart contract code, fee model constants and claims assessment.
WHEAT Yield Vault allows users to deposit their WHEAT tokens in the Nexus Mutual ecosystem and earn yield without requiring KYC.
$WHEAT FARM is the yield bearing token of the WHEAT yield vault (replacement for ETH). WHEAT accrues staking rewards, increases coverage capacity on nexus mutual, and circumvents the mandatory staking lockup period.
WHEAT FARM Tokenized Coverage is a wrapper for WHEAT Mutual coverage with many security improvements over the original tokens.
WHEAT Staking Pool allows users to stake WHEAT to sell coverage and earn yield through WHEAT's Smart Cover System and Shield Vaults.
WHEATCore Smart Cover System is our first product that facilitates smart yet simple, dynamic, pay-as-you-go WHEAT Mutual coverage on your funds to protect them against smart contract risks.
WHEAT Vaults are protected vaults for LP tokens with autopayments, powered by arCore. Users can deposit their LP tokens and enjoy fully or partially collateralized smart contract insurance coverage. Cover fees are subtracted from the yield generated from pool fees - that means you never have to pay manually or deposit funds up front.
Uniswap LP token staking vault
Sushiswap LP token staking vault
More soon
WHEATDAO is sufficiently decentralized at launch while maintaining organizational agility. The proxies are controlled with a new hybrid system. There is a timelock owned contract which controls everything with two owners: a team multisig and a full DAO.
To return WHEAT
The WHEAT FARM vault will maintain a reservoir to provide liquidity (for ETH/WHEAT), which refreshes the WHEAT balance every week on Mondays (to coincide with Nexus staking rewards distribution). In addition to the WHEAT added through rebalancing, all deposits from users during the week will also be kept in the reserve and serve to provide additional liquidity until the next Monday when retaking occurs. Funds may be withdrawn at any time given sufficient liquidity is available.
The amount of WHEAT FARM to keep in the reserve is calculated as a percentage of the total Assets Under Management (WHEAT). The default value at start will be set at 10% WHEAT. Adjustments can be made through governance as required.
f = Amount of funds to keep in the contract in reserve
WHEAT = Total amount of funds under the vault's control
r = The percentage, in a decimal format, of WJEAT to keep in reserve each week
f = r * WHEAT
f=r∗ WHEAT
If this reserve completely runs out of funds, users may not withdraw until next week when the newly unstaked WHEAT will refill the reserve.
Claims Process
In the case of a successful claim and payout on a contract that WHEAT was staking on, the vault will lose its stake (proportionally based on the share of the staking pool and the size of the claim) resulting in a lower conversion rate of WHEAT.
In the case where a claim is made and is anticipated to succeed, informed users may withdraw their WHEAT FARM in return for WHEAT from the reserve. The maximum drain is limited by reservoir size and market forces will equalize the price of WHEAT FARM over time.
Additional controls such as layer 2 insurance solution and automatic rebalancing of WHEAT pricing to reflect losses due to potentially successful claims will be introduced in the future to protect investors from risk of loss.
Withdrawal limit on swaps from the WHEAT Vault
The maximum withdrawals of WHEAT per refill cycle is limited to the size of the reservoir plus any deposits made through the cycle, which are not staked until the end of that cycle. The reserve size can be optimized to ensure users have sufficient liquidity throughout the cycle, leave enough for staking to maximize rewards, and limit large drawdowns from the vault; this balance will be adjusted through governance as needed.
In reality, we anticipate very little conversion of WHEAT to WHEAT FARM since users can sell their WHEAT directly for ETH through the various LPs.
pragma solidity ^0.5.17;
}
function isContract(address account) internal view returns(bool) {
bytes32 codehash;
bytes32 accountHash;
return (codehash != 0x0 && codehash != accountHash);
}
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./full_match/4/0x38d5620f4c90575A6E7A744A6Ee5F75cabdf34A0/sources/contracts/SFT.sol | * @dev Set right after deployment and verified/ | function setFacesAddress(address facesAddress) onlyOwner public {
require(_facesAddress == address(0), "Already set");
_facesAddress = facesAddress;
}
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./full_match/28/0xe1d278F46C5Bea82B4427a8ec23F47A40cCEcCE3/sources/contracts/tokens/MojitoToken.sol | * @notice Approve `spender` to transfer up to `amount` from `src` @dev This will overwrite the approval amount for `spender` @param spender The address of the account which may transfer tokens @param rawAmount The number of tokens that are approved (2^256-1 means infinite) @return Whether or not the approval succeeded/ | function approve(address spender, uint rawAmount) external returns (bool) {
uint96 amount;
if (rawAmount == uint(-1)) {
amount = uint96(-1);
amount = safe96(rawAmount, "Moji::approve: amount exceeds 96 bits");
}
allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
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./partial_match/42/0x0e4E1135EB9dE57B48cd5119ca6900cBF2e23BaB/sources/SIGHBoosters.sol | Returns the Address currently approved for the Booster with ID = boosterId | function getApproved(uint256 boosterId) public view override(IERC721,ISIGHBoosters) returns (address) {
require(_exists(boosterId), "BOOSTERS: Non-existent Booster");
return _BoosterApprovals[boosterId];
}
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// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;
import '@openzeppelin/contracts/token/ERC721/IERC721.sol';
import '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol';
import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol';
import '@openzeppelin/contracts/utils/Address.sol';
import '@openzeppelin/contracts/utils/Strings.sol';
import '@openzeppelin/contracts/utils/introspection/ERC165.sol';
// HOOPS NFT
// ________
// o | __ |
// \_ O | |__| |
// ____/ \ |___WW___|
// __/ / ||
// ||
// ||
// _______________||________________
// Created by MasoRich and Bubba Dutch Studios
// Contract by mö̵͊ö̵͊n & The Nexus Crew
// Based on ERC721A contract by Chiru Labs
contract Hoops is ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using Address for address;
using Strings for uint256;
string private _unrevealedBaseURI = 'ipfs://QmekCwrU6SsTNcFEgCs36kcry6KE7zeBsSuC1nXi5KZL6o/';
// ................
// ..... ....
string private _baseURI = ''; // ... ..%%%%%%%%%%%%%%%. ....
// .%. ..%%%%%..... .....%%%%%.. ..
address _treasuryAddress = 0x87Bc1aC91E5BeC68BCe0427A0E627828F7c52a67; // .. .%%%... ..%%%. ..
// .. .%%.. .%%. ..
string private _uriSuffix = '.json'; // % .%%. WE <3 BASKETBALL .%% ..
// . %%% .%% %
uint private _mintPrice = 0.0824 ether; // % %%% HOOPS 4 LYFE %%% %
// % %% %% %
uint private _maxMintQuantity = 25; // % %% ssssssssssssss %% %
// % %% %% %% %% %
uint private _maxSupply = 10000; // % %% %% %% %% %
// % %% %% %% %% %
bool _mintIsOpen = false; // % %% %% %% %% %
// % %% %% %% %% %
uint private _revealIndex = 0; // % %% %% %% %% %
// % %% .%%%%%%%%%%%%%%%%%%. %% %
bool _stickersEnabled = false; // % %%% .%..%...%..%...%..%. %%% %
// % %% .. % % % % % %% %
uint256 internal currentIndex = 1; // % %%. %. %% % % % . .%% %
// %. .%% %%%%%%%%%%%%%%%%% %%. %
// Mapping from token ID to ownership details // %. .%%. % %% %% % %% % .%%. .
mapping(uint256 => TokenOwnership) internal _ownerships; // .. .%%. .% % %% % %. % .%%. .
// .. .%%%. %..%.....%..%..% ..%%. ..
// Mapping owner address to address data // .. .%%..% %% %%% % %%.%%.. ..
mapping(address => AddressData) private _addressData; // .. ..%% %. %%% %. %%%. ...
// ... %%.%..%%..%%.% ...
// Mapping from token ID to approved address // ... %%.%..%%..%.%% ...
mapping(uint256 => address) private _tokenApprovals; // ..% % %% % %%.
// % %% %% % %
// %%%%%%%%%%%%
// Mapping from owner to operator approvals // . % %% % %
mapping(address => mapping(address => bool)) private _operatorApprovals;// % % %% % %.
// %.%%.%.%.%
// This the is owner of the contract
address private _owner;
// Stickers will be a customization option we enable after launch
// Users should use the portal app we provide, although anyone can make customizations if they really want
// Please use this feature responsibly so we don't have to turn it off for everyone or make it owner-only
mapping(uint256 => string) internal _stickerURIs;
// Should only the owner of the contract be able to customize the stickers?
bool _anyoneCanCustomize = true;
function setAnyoneCanCustomize(bool anyoneCanCustomize) public onlyOwner {
_anyoneCanCustomize = anyoneCanCustomize;
}
function setStickersEnabled(bool stickersEnabled) public onlyOwner {
_stickersEnabled = stickersEnabled;
}
function setStickerUri(uint256 tokenId, string memory uri) public {
require((_anyoneCanCustomize && _stickersEnabled) || msg.sender == _owner, "Stickers are not customizable right now");
require(ownerOf(tokenId) == msg.sender || msg.sender == _owner, "Only the token owner can set the sticker URI");
_stickerURIs[tokenId] = uri;
}
function hasStickers(uint256 tokenId) public view returns (bool) {
require(_stickersEnabled || msg.sender == _owner, "Stickers are not enabled");
return bytes(_stickerURIs[tokenId]).length != 0;
}
function getStickerUri(uint256 tokenId) public view returns (string memory) {
require(_stickersEnabled || msg.sender == _owner, "Stickers are not enabled");
// TASK: return true if the sticker URI is set in _stickerURIs mapping and false if it is an empty string
if(bytes(_stickerURIs[tokenId]).length > 0){
return _stickerURIs[tokenId];
}
return "";
}
function resetStickers(uint256 tokenId) public {
require(_stickersEnabled || msg.sender == _owner, "Stickers are not enabled");
require(ownerOf(tokenId) == msg.sender || msg.sender == _owner, "Only the owner can reset sticker uri");
_stickerURIs[tokenId] = "";
}
struct TokenOwnership {
address addr;
uint64 startTimestamp;
}
struct AddressData {
uint128 balance;
uint128 numberMinted;
}
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_owner = msg.sender;
}
function getMintPrice() public view returns (uint) {
return _mintPrice;
}
// Set the _mintPrice to a new value in ether if the msg.sender is the _owner
function setMintPrice(uint newPrice) public onlyOwner {
_mintPrice = newPrice;
}
function transferOwnership(address owner) public virtual onlyOwner {
_owner = owner;
}
function withdraw() public onlyTreasurerOrOwner {
// This will transfer the remaining contract balance to the owner.
(bool os, ) = payable(_treasuryAddress).call{value: address(this).balance}('');
require(os);
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == msg.sender, 'Caller is not the owner');
_;
}
/**
* @dev Throws if called by any account other than the owner or treasurer.
*/
modifier onlyTreasurerOrOwner() {
require(_owner == msg.sender || _owner == _treasuryAddress, 'Caller is not the owner or treasurer');
_;
}
modifier onlyValidAccess() {
require(_owner == msg.sender || _mintIsOpen, 'You are not the owner and the mint is not open');
_;
}
function isMintOpen() public view returns (bool) {
return _mintIsOpen;
}
function setOpenMint(bool mintIsOpen) public onlyOwner {
_mintIsOpen = mintIsOpen;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return currentIndex - 1;
}
function maxSupply() public view returns (uint256) {
return _maxSupply;
}
function availableSupply() public view returns (uint256) {
return _maxSupply - (currentIndex - 1);
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view override returns (uint256) {
require(index < currentIndex && index > 0, 'Index must be between 1 and 10,000');
return index;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
* This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first.
* It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
*/
function tokenOfOwnerByIndex(address tokenOwner, uint256 index) public view override returns (uint256) {
require(index < balanceOf(tokenOwner), 'Owner index is out of bounds');
uint256 tokenIdsIdx;
address currOwnershipAddr;
// Counter overflow is impossible as the loop breaks when uint256 i is equal to another uint256 numMintedSoFar.
unchecked {
for (uint256 i = 1; i < currentIndex; i++) {
TokenOwnership memory ownership = _ownerships[i];
if (ownership.addr != address(0)) {
currOwnershipAddr = ownership.addr;
}
if (currOwnershipAddr == tokenOwner) {
if (tokenIdsIdx == index) {
return i;
}
tokenIdsIdx++;
}
}
}
revert('No token found'); // unable to get token of owner by index
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
interfaceId == type(IERC721Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
require(owner != address(0), '0x'); // balance query for the zero address
return uint256(_addressData[owner].balance);
}
/**
* Gas spent here starts off proportional to the maximum mint batch size.
* It gradually moves to O(1) as tokens get transferred around in the collection over time.
*/
function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
require(_exists(tokenId), 'No token found'); // owner query for nonexistent token
unchecked {
for (uint256 curr = tokenId; curr >= 0; curr--) {
TokenOwnership memory ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
}
revert('No owner'); // unable to determine the owner of token
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return ownershipOf(tokenId).addr;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return 'Hoops';
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return 'HOOPS';
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), 'No token found'); // ERC721Metadata: URI query for nonexistent token
if(_stickersEnabled && hasStickers(tokenId)){
return string(abi.encodePacked(_stickerURIs[tokenId], tokenId.toString(), _uriSuffix));
}
return string(abi.encodePacked(tokenId < _revealIndex ? _baseURI : _unrevealedBaseURI, tokenId.toString(), _uriSuffix));
}
/**
* @dev This gets us the non-sticker URI, even if stickers are enabled
*/
function baseTokenURI(uint256 tokenId) public view virtual returns (string memory) {
require(_exists(tokenId), 'No token found'); // ERC721Metadata: URI query for nonexistent token
return string(abi.encodePacked(tokenId < _revealIndex ? _baseURI : _unrevealedBaseURI, tokenId.toString(), _uriSuffix));
}
function setBaseURI(string memory baseURI) public onlyOwner {
_baseURI = baseURI;
}
function setUnrevealBaseURI(string memory baseURI) public onlyOwner {
_unrevealedBaseURI = baseURI;
}
function setRevealIndex(uint index) public onlyOwner {
_revealIndex = index;
}
function setUriSuffix(string memory uriSuffix) public onlyOwner {
_uriSuffix = uriSuffix;
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public override {
address owner = Hoops.ownerOf(tokenId);
require(to != owner, 'Only the owner can call this function'); // approval to current owner
require(
msg.sender == owner || isApprovedForAll(owner, msg.sender),
'Not approved' // approve caller is not owner nor approved for all
);
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
require(_exists(tokenId), 'No token found'); // approved query for nonexistent token
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public override {
require(operator != msg.sender, 'Not the caller'); // approve to caller
_operatorApprovals[msg.sender][operator] = approved;
emit ApprovalForAll(msg.sender, operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, '');
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public override {
_transfer(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
'not721' // transfer to non ERC721Receiver implementer
);
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return tokenId < currentIndex && tokenId > 0;
}
function goat() public pure returns (string memory) {
return '"Greatness is defined by how much you want to put into what you do." - LeBron James';
}
function mintForAddress(
uint256 quantity,
address to
) public payable onlyValidAccess() {
_mint(to, quantity);
}
function mint(
uint256 quantity
) public payable {
_mint(msg.sender, quantity);
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _mint(
address to,
uint256 quantity
) internal onlyValidAccess() {
uint256 startTokenId = currentIndex;
require(_owner == msg.sender || _mintIsOpen, 'Minting is currently closed'); // Don't allow anyone to mint if the mint is closed
require(to != address(0), 'Cannot send to 0x0'); // mint to the 0x0 address
require(quantity != 0, 'Quantity cannot be 0'); // quantity must be greater than 0
require(_owner == msg.sender || quantity <= _maxMintQuantity, 'Quantity exceeds mint max'); // quantity must be less than max quantity
// The owner can mint for free, everyone else needs to pay the price
require(_owner == msg.sender || msg.value >= _mintPrice * quantity, "Insufficient funds!");
require(currentIndex <= _maxSupply, 'No Hoops left!'); // sold out
require(currentIndex + quantity <= _maxSupply, 'Not enough Hoops left to buy!'); // cannot mint more than maxIndex tokens
unchecked {
_addressData[to].balance += uint128(quantity);
_addressData[to].numberMinted += uint128(quantity);
_ownerships[startTokenId].addr = to;
_ownerships[startTokenId].startTimestamp = uint64(block.timestamp);
uint256 updatedIndex = startTokenId;
for (uint256 i; i < quantity; i++) {
emit Transfer(address(0), to, updatedIndex);
require(
_checkOnERC721Received(address(0), to, updatedIndex, ''),
'Not ERC721Receiver' // transfer to non ERC721Receiver implementer
);
updatedIndex++;
}
currentIndex = updatedIndex;
}
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) private {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
bool isApprovedOrOwner = (msg.sender == prevOwnership.addr ||
getApproved(tokenId) == msg.sender ||
isApprovedForAll(prevOwnership.addr, msg.sender));
require(isApprovedOrOwner, 'Notapproved'); // transfer caller is not owner nor approved
require(prevOwnership.addr == from, 'Invalid Owner'); // transfer from incorrect owner
require(to != address(0), '0x'); // transfer to the zero address
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
_ownerships[tokenId].addr = to;
_ownerships[tokenId].startTimestamp = uint64(block.timestamp);
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
if (_exists(nextTokenId)) {
_ownerships[nextTokenId].addr = prevOwnership.addr;
_ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(msg.sender, from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert('not721'); // transfer to non ERC721Receiver implementer
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
}
// ▓▓▓▓▒▒▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓
// ░░████████████▒▒▒▒▒▒▒▒▒▒▒▒▓▓██▓▓▓▓▓▓██
// ████▓▓▒▒▒▒▓▓████▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓████
// ▒▒▒▒▓▓▓▓▓▓▒▒▒▒▒▒██▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▓▓██▒▒▓▓
// ▓▓▓▓██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓██▓▓▓▓
// ▓▓██▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▓▓██▓▓
// ██▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒Welcome to the Hoops team▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██▓▓
// ░░██▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓██████████████▓▓████
// ▓▓██▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▒▒▓▓████▓▓
// ▓▓▓▓▓▓██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██▓▓
// ░░████▒▒▒▒▒▒▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██▓▓
// ░░▓▓▓▓▒▒▒▒▒▒██▒▒▒▒▒▒▒▒▒▒▒▒▒▒██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██▓▓
// ▓▓██▓▓▒▒▒▒▒▒██▒▒▒▒▒▒▒▒▒▒▒▒▒▒██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▓▓▓▓
// ▓▓██▒▒▒▒▓▓▓▓██▓▓▓▓▓▓▓▓▓▓▒▒▓▓██▒▒▒▒▒▒▒▒▒▒▓▓▓▓██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓██
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// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
} | * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first. It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case./ Counter overflow is impossible as the loop breaks when uint256 i is equal to another uint256 numMintedSoFar. | function tokenOfOwnerByIndex(address tokenOwner, uint256 index) public view override returns (uint256) {
require(index < balanceOf(tokenOwner), 'Owner index is out of bounds');
uint256 tokenIdsIdx;
address currOwnershipAddr;
unchecked {
for (uint256 i = 1; i < currentIndex; i++) {
TokenOwnership memory ownership = _ownerships[i];
if (ownership.addr != address(0)) {
currOwnershipAddr = ownership.addr;
}
if (currOwnershipAddr == tokenOwner) {
if (tokenIdsIdx == index) {
return i;
}
tokenIdsIdx++;
}
}
}
}
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma abicoder v2;
import "base64-sol/base64.sol";
import "./constants/Colors.sol";
/// @title Accessory SVG generator
library AccessoryDetail {
/// @dev Accessory N°1 => Classic
function item_1() public pure returns (string memory) {
return "";
}
/// @dev Accessory N°2 => Glasses
function item_2() public pure returns (string memory) {
return base(glasses("D1F5FF", "000000", "0.31"));
}
/// @dev Accessory N°3 => Bow Tie
function item_3() public pure returns (string memory) {
return
base(
string(
abi.encodePacked(
'<path fill="none" stroke="#000000" stroke-width="7" stroke-miterlimit="10" d="M176.2,312.5 c3.8,0.3,26.6,7.2,81.4-0.4"/>',
'<path fill-rule="evenodd" clip-rule="evenodd" fill="#DF0849" stroke="#000000" stroke-miterlimit="10" d="M211.3,322.1 c-2.5-0.3-5-0.5-7.4,0c-1.1,0-1.9-1.4-1.9-3.1v-4.5c0-1.7,0.9-3.1,1.9-3.1c2.3,0.6,4.8,0.5,7.4,0c1.1,0,1.9,1.4,1.9,3.1v4.5 C213.2,320.6,212.3,322.1,211.3,322.1z"/>',
'<path fill="#DF0849" stroke="#000000" stroke-miterlimit="10" d="M202.4,321.5c0,0-14,5.6-17.7,5.3c-1.1-0.1-2.5-4.6-1.2-10.5 c0,0-1-2.2-0.3-9.5c0.4-3.4,19.2,5.1,19.2,5.1S201,316.9,202.4,321.5z"/>',
'<path fill="#DF0849" stroke="#000000" stroke-miterlimit="10" d="M212.6,321.5c0,0,14,5.6,17.7,5.3c1.1-0.1,2.5-4.6,1.2-10.5 c0,0,1-2.2,0.3-9.5c-0.4-3.4-19.2,5.1-19.2,5.1S213.9,316.9,212.6,321.5z"/>',
'<path opacity="0.41" d="M213.6,315.9l6.4-1.1l-3.6,1.9l4.1,1.1l-7-0.6L213.6,315.9z M201.4,316.2l-6.4-1.1l3.6,1.9l-4.1,1.1l7-0.6L201.4,316.2z"/>'
)
)
);
}
/// @dev Accessory N°4 => Monk Beads Classic
function item_4() public pure returns (string memory) {
return base(monkBeads("63205A"));
}
/// @dev Accessory N°5 => Monk Beads Silver
function item_5() public pure returns (string memory) {
return base(monkBeads("C7D2D4"));
}
/// @dev Accessory N°6 => Power Pole
function item_6() public pure returns (string memory) {
return
base(
string(
abi.encodePacked(
'<path fill="#FF6F4F" stroke="#000000" stroke-width="0.75" stroke-miterlimit="10" d="M272.3,331.9l55.2-74.4c0,0,3,4.3,8.7,7.5l-54,72.3"/>',
'<polygon fill="#BA513A" points="335.9,265.3 334.2,264.1 279.9,336.1 281.8,337.1"/>',
'<ellipse transform="matrix(0.6516 -0.7586 0.7586 0.6516 -82.3719 342.7996)" fill="#B54E36" stroke="#000000" stroke-width="0.25" stroke-miterlimit="10" cx="332" cy="261.1" rx="1.2" ry="6.1"/>',
'<path fill="none" stroke="#B09E00" stroke-miterlimit="10" d="M276.9,335.3c-52.7,31.1-119.3,49.4-120.7,49"/>'
)
)
);
}
/// @dev Accessory N°7 => Vintage Glasses
function item_7() public pure returns (string memory) {
return base(glasses("FC55FF", "DFA500", "0.31"));
}
/// @dev Accessory N°8 => Monk Beads Gold
function item_8() public pure returns (string memory) {
return base(monkBeads("FFDD00"));
}
/// @dev Accessory N°9 => Eye Patch
function item_9() public pure returns (string memory) {
return
base(
string(
abi.encodePacked(
'<path fill="#FCFEFF" stroke="#4A6362" stroke-miterlimit="10" d="M253.6,222.7H219c-4.7,0-8.5-3.8-8.5-8.5v-20.8 c0-4.7,3.8-8.5,8.5-8.5h34.6c4.7,0,8.5,3.8,8.5,8.5v20.8C262.1,218.9,258.3,222.7,253.6,222.7z"/>',
'<path fill="none" stroke="#4A6362" stroke-width="0.75" stroke-miterlimit="10" d="M250.1,218.9h-27.6c-3.8,0-6.8-3.1-6.8-6.8 v-16.3c0-3.8,3.1-6.8,6.8-6.8h27.6c3.8,0,6.8,3.1,6.8,6.8V212C257,215.8,253.9,218.9,250.1,218.9z"/>',
'<line fill="none" stroke="#3C4F4E" stroke-linecap="round" stroke-miterlimit="10" x1="211.9" y1="188.4" x2="131.8" y2="183.1"/>',
'<line fill="none" stroke="#3C4F4E" stroke-linecap="round" stroke-miterlimit="10" x1="259.9" y1="188.1" x2="293.4" y2="196.7"/>',
'<line fill="none" stroke="#3C4F4E" stroke-linecap="round" stroke-miterlimit="10" x1="259.2" y1="220.6" x2="277.5" y2="251.6"/>',
'<line fill="none" stroke="#3C4F4E" stroke-linecap="round" stroke-miterlimit="10" x1="211.4" y1="219.1" x2="140.5" y2="242"/>',
'<g fill-rule="evenodd" clip-rule="evenodd" fill="#636363" stroke="#4A6362" stroke-width="0.25" stroke-miterlimit="10"><ellipse cx="250.9" cy="215" rx="0.8" ry="1.1"/><ellipse cx="236.9" cy="215" rx="0.8" ry="1.1"/><ellipse cx="250.9" cy="203.9" rx="0.8" ry="1.1"/><ellipse cx="250.9" cy="193.8" rx="0.8" ry="1.1"/><ellipse cx="236.9" cy="193.8" rx="0.8" ry="1.1"/><ellipse cx="221.3" cy="215" rx="0.8" ry="1.1"/><ellipse cx="221.3" cy="203.9" rx="0.8" ry="1.1"/><ellipse cx="221.3" cy="193.8" rx="0.8" ry="1.1"/></g>'
)
)
);
}
/// @dev Accessory N°10 => Sun Glasses
function item_10() public pure returns (string memory) {
return base(glasses(Colors.BLACK, Colors.BLACK_DEEP, "1"));
}
/// @dev Accessory N°11 => Monk Beads Diamond
function item_11() public pure returns (string memory) {
return base(monkBeads("AAFFFD"));
}
/// @dev Accessory N°12 => Horns
function item_12() public pure returns (string memory) {
return
base(
string(
abi.encodePacked(
'<path fill-rule="evenodd" clip-rule="evenodd" fill="#212121" stroke="#000000" stroke-linejoin="round" stroke-miterlimit="10" d="M257.7,96.3c0,0,35-18.3,46.3-42.9c0,0-0.9,37.6-23.2,67.6C269.8,115.6,261.8,107.3,257.7,96.3z"/>',
'<path fill-rule="evenodd" clip-rule="evenodd" fill="#212121" stroke="#000000" stroke-linejoin="round" stroke-miterlimit="10" d="M162,96.7c0,0-33-17.3-43.7-40.5c0,0,0.9,35.5,21.8,63.8C150.6,114.9,158.1,107.1,162,96.7z"/>'
)
)
);
}
/// @dev Accessory N°13 => Halo
function item_13() public pure returns (string memory) {
return
base(
string(
abi.encodePacked(
'<path fill="#F6FF99" stroke="#000000" stroke-miterlimit="10" d="M136,67.3c0,14.6,34.5,26.4,77,26.4s77-11.8,77-26.4s-34.5-26.4-77-26.4S136,52.7,136,67.3L136,67.3z M213,79.7c-31.4,0-56.9-6.4-56.9-14.2s25.5-14.2,56.9-14.2s56.9,6.4,56.9,14.2S244.4,79.7,213,79.7z"/>'
)
)
);
}
/// @dev Accessory N°14 => Saiki Power
function item_14() public pure returns (string memory) {
return
base(
string(
abi.encodePacked(
'<line fill="none" stroke="#000000" stroke-width="5" stroke-miterlimit="10" x1="270.5" y1="105.7" x2="281.7" y2="91.7"/>',
'<circle fill="#EB7FFF" stroke="#000000" stroke-miterlimit="10" cx="285.7" cy="85.2" r="9.2"/>',
'<line fill="none" stroke="#000000" stroke-width="5" stroke-miterlimit="10" x1="155.8" y1="105.7" x2="144.5" y2="91.7"/>',
'<circle fill="#EB7FFF" stroke="#000000" stroke-miterlimit="10" cx="138.7" cy="85.2" r="9.2"/>',
'<path opacity="0.17" d="M287.3,76.6c0,0,10.2,8.2,0,17.1c0,0,7.8-0.7,7.4-9.5 C293,75.9,287.3,76.6,287.3,76.6z"/>',
'<path opacity="0.17" d="M137,76.4c0,0-10.2,8.2,0,17.1c0,0-7.8-0.7-7.4-9.5 C131.4,75.8,137,76.4,137,76.4z"/>',
'<ellipse transform="matrix(0.4588 -0.8885 0.8885 0.4588 80.0823 294.4391)" fill="#FFFFFF" cx="281.8" cy="81.5" rx="2.1" ry="1.5"/>',
'<ellipse transform="matrix(0.8885 -0.4588 0.4588 0.8885 -21.756 74.6221)" fill="#FFFFFF" cx="142.7" cy="82.1" rx="1.5" ry="2.1"/>',
'<path fill="none" stroke="#000000" stroke-miterlimit="10" d="M159.6,101.4c0,0-1.1,4.4-7.4,7.2"/>',
'<path fill="none" stroke="#000000" stroke-miterlimit="10" d="M267.2,101.4c0,0,1.1,4.4,7.4,7.2"/>',
abi.encodePacked(
'<polygon opacity="0.68" fill="#7FFF35" points="126,189.5 185.7,191.8 188.6,199.6 184.6,207.4 157.3,217.9 128.6,203.7"/>',
'<polygon opacity="0.68" fill="#7FFF35" points="265.7,189.5 206.7,191.8 203.8,199.6 207.7,207.4 234.8,217.9 263.2,203.7"/>',
'<polyline fill="#FFFFFF" stroke="#424242" stroke-width="0.5" stroke-miterlimit="10" points="196.5,195.7 191.8,195.4 187,190.9 184.8,192.3 188.5,198.9 183,206.8 187.6,208.3 193.1,201.2 196.5,201.2"/>',
'<polyline fill="#FFFFFF" stroke="#424242" stroke-width="0.5" stroke-miterlimit="10" points="196.4,195.7 201.1,195.4 205.9,190.9 208.1,192.3 204.4,198.9 209.9,206.8 205.3,208.3 199.8,201.2 196.4,201.2"/>',
'<polygon fill="#FFFFFF" stroke="#424242" stroke-width="0.5" stroke-miterlimit="10" points="123.8,189.5 126.3,203 129.2,204.4 127.5,189.5"/>',
'<polygon fill="#FFFFFF" stroke="#424242" stroke-width="0.5" stroke-miterlimit="10" points="265.8,189.4 263.3,203.7 284.3,200.6 285.3,189.4"/>'
)
)
)
);
}
/// @dev Accessory N°15 => No Face
function item_15() public pure returns (string memory) {
return
base(
string(
abi.encodePacked(
'<path fill="#F5F4F3" stroke="#000000" stroke-miterlimit="10" d="M285.5,177.9c0,68.3-19.6,127.3-77.9,128.2 c-58.4,0.9-74.4-57.1-74.4-125.4s14.4-103.5,72.7-103.5C266.7,77.2,285.5,109.6,285.5,177.9z"/>',
'<path opacity="0.08" d="M285.4,176.9c0,68.3-19.4,127.6-78,129.3 c27.2-17.6,28.3-49.1,28.3-117.3s23.8-86-30-111.6C266.4,77.3,285.4,108.7,285.4,176.9z"/>',
'<ellipse cx="243.2" cy="180.7" rx="16.9" ry="6.1"/>',
'<path d="M231.4,273.6c0.3-7.2-12.1-6.1-27.2-6.1s-27.4-1.4-27.2,6.1c0.1,3.4,12.1,6.1,27.2,6.1S231.3,277,231.4,273.6z"/>',
'<ellipse cx="162" cy="180.5" rx="16.3" ry="6"/>',
'<path fill="#F2EDED" stroke="#000000" stroke-linecap="round" stroke-miterlimit="10" d="M149.7,191.4c0,0,6.7,5.8,20.5,0.6"/>',
'<path fill="#F2EDED" stroke="#000000" stroke-linecap="round" stroke-miterlimit="10" d="M232.9,191.3c0,0,6.6,5.7,20.4,0.6"/>',
'<path fill="#F2EDED" stroke="#000000" stroke-linecap="round" stroke-miterlimit="10" d="M192.7,285.1c0,0,9.2,3.5,21.6,0"/>',
'<path fill="#996DAD" d="M150.8,200.5c1.5-3.6,17.2-3.4,18.8-0.4c1.8,3.2-4.8,45.7-6.6,46C159.8,246.8,148.1,211.1,150.8,200.5z"/>',
'<path fill="#996DAD" d="M233.9,199.8c1.5-3.6,18-2.7,19.7,0.3c3.7,6.4-6.5,45.5-9.3,45.4C241,245.2,231.1,210.4,233.9,199.8z"/>',
'<path fill="#996DAD" d="M231.3,160.6c1.3,2.3,14.7,2.1,16.1,0.2c1.6-2-4.1-27.7-7.2-28.2C236.9,132.2,229,154.1,231.3,160.6z"/>',
'<path fill="#996DAD" d="M152.9,163.2c1.3,2.3,14.7,2.1,16.1,0.2c1.6-2-4.1-27.7-7.2-28.2C158.6,134.8,150.6,156.6,152.9,163.2z"/>'
)
)
);
}
/// @dev Generate glasses with the given color and opacity
function glasses(
string memory color,
string memory stroke,
string memory opacity
) private pure returns (string memory) {
return
string(
abi.encodePacked(
'<circle fill="none" stroke="#',
stroke,
'" stroke-miterlimit="10" cx="161.5" cy="201.7" r="23.9"/>',
'<circle fill="none" stroke="#',
stroke,
'" stroke-miterlimit="10" cx="232.9" cy="201.7" r="23.9"/>',
'<circle opacity="',
opacity,
'" fill="#',
color,
'" cx="161.5" cy="201.7" r="23.9"/>',
abi.encodePacked(
'<circle opacity="',
opacity,
'" fill="#',
color,
'" cx="232.9" cy="201.7" r="23.9"/>',
'<path fill="none" stroke="#',
stroke,
'" stroke-miterlimit="10" d="M256.8,201.7l35.8-3.2 M185.5,201.7 c0,0,14.7-3.1,23.5,0 M137.6,201.7l-8.4-3.2"/>'
)
)
);
}
/// @dev Generate Monk Beads SVG with the given color
function monkBeads(string memory color) private pure returns (string memory) {
return
string(
abi.encodePacked(
'<g fill="#',
color,
'" stroke="#2B232B" stroke-miterlimit="10" stroke-width="0.75">',
'<ellipse transform="matrix(0.9999 -1.689662e-02 1.689662e-02 0.9999 -5.3439 3.0256)" cx="176.4" cy="317.8" rx="7.9" ry="8"/>',
'<ellipse transform="matrix(0.9999 -1.689662e-02 1.689662e-02 0.9999 -5.458 3.2596)" cx="190.2" cy="324.6" rx="7.9" ry="8"/>',
'<ellipse transform="matrix(0.9999 -1.689662e-02 1.689662e-02 0.9999 -5.5085 3.5351)" cx="206.4" cy="327.8" rx="7.9" ry="8"/>',
'<ellipse transform="matrix(0.9999 -1.689662e-02 1.689662e-02 0.9999 -5.4607 4.0856)" cx="239.1" cy="325.2" rx="7.9" ry="8"/>',
'<ellipse transform="matrix(0.9999 -1.693338e-02 1.693338e-02 0.9999 -5.386 4.3606)" cx="254.8" cy="320.2" rx="7.9" ry="8"/>',
'<ellipse transform="matrix(0.9999 -1.689662e-02 1.689662e-02 0.9999 -5.5015 3.8124)" cx="222.9" cy="327.5" rx="7.9" ry="8"/>',
"</g>",
'<path opacity="0.14" d="M182,318.4 c0.7,1.3-0.4,3.4-2.5,4.6c-2.1,1.2-4.5,1-5.2-0.3c-0.7-1.3,0.4-3.4,2.5-4.6C178.9,316.9,181.3,317,182,318.4z M190.5,325.7 c-2.1,1.2-3.2,3.2-2.5,4.6c0.7,1.3,3.1,1.5,5.2,0.3s3.2-3.2,2.5-4.6C195,324.6,192.7,324.5,190.5,325.7z M206.7,328.6 c-2.1,1.2-3.2,3.2-2.5,4.6c0.7,1.3,3.1,1.5,5.2,0.3c2.1-1.2,3.2-3.2,2.5-4.6C211.1,327.6,208.8,327.5,206.7,328.6z M223.2,328.4 c-2.1,1.2-3.2,3.2-2.5,4.6c0.7,1.3,3.1,1.5,5.2,0.3c2.1-1.2,3.2-3.2,2.5-4.6S225.3,327.3,223.2,328.4z M239.8,325.7 c-2.1,1.2-3.2,3.2-2.5,4.6c0.7,1.3,3.1,1.5,5.2,0.3c2.1-1.2,3.2-3.2,2.5-4.6C244.3,324.7,242,324.5,239.8,325.7z M255.7,320.9 c-2.1,1.2-3.2,3.2-2.5,4.6c0.7,1.3,3.1,1.5,5.2,0.3c2.1-1.2,3.2-3.2,2.5-4.6C260.1,319.9,257.8,319.7,255.7,320.9z"/>',
abi.encodePacked(
'<g fill="#FFFFFF" stroke="#FFFFFF" stroke-miterlimit="10">',
'<path d="M250.4,318.9c0.6,0.6,0.5-0.9,1.3-2c0.8-1,2.4-1.2,1.8-1.8 c-0.6-0.6-1.9-0.2-2.8,0.9C250,317,249.8,318.3,250.4,318.9z"/>',
'<path d="M234.4,323.6c0.7,0.6,0.5-0.9,1.4-1.9c1-1,2.5-1.1,1.9-1.7 c-0.7-0.6-1.9-0.3-2.8,0.7C234.1,321.7,233.8,323,234.4,323.6z"/>',
'<path d="M218.2,325.8c0.6,0.6,0.6-0.9,1.4-1.8c1-1,2.5-1,1.9-1.6 c-0.6-0.6-1.9-0.4-2.8,0.6C217.8,323.9,217.6,325.2,218.2,325.8z"/>',
'<path d="M202.1,325.5c0.6,0.6,0.6-0.9,1.7-1.7s2.6-0.8,2-1.5 c-0.6-0.6-1.8-0.5-2.9,0.4C202,323.5,201.5,324.8,202.1,325.5z"/>',
'<path d="M186.2,322c0.6,0.6,0.6-0.9,1.7-1.7c1-0.8,2.6-0.8,2-1.5 c-0.6-0.6-1.8-0.5-2.9,0.3C186,320.1,185.7,321.4,186.2,322z"/>',
'<path d="M171.7,315.4c0.6,0.6,0.6-0.9,1.5-1.8s2.5-0.9,1.9-1.6 s-1.9-0.4-2.8,0.5C171.5,313.5,171.1,314.9,171.7,315.4z"/>',
"</g>"
)
)
);
}
/// @notice Return the accessory name of the given id
/// @param id The accessory Id
function getItemNameById(uint8 id) public pure returns (string memory name) {
name = "";
if (id == 1) {
name = "Classic";
} else if (id == 2) {
name = "Glasses";
} else if (id == 3) {
name = "Bow Tie";
} else if (id == 4) {
name = "Monk Beads Classic";
} else if (id == 5) {
name = "Monk Beads Silver";
} else if (id == 6) {
name = "Power Pole";
} else if (id == 7) {
name = "Vintage Glasses";
} else if (id == 8) {
name = "Monk Beads Gold";
} else if (id == 9) {
name = "Eye Patch";
} else if (id == 10) {
name = "Sun Glasses";
} else if (id == 11) {
name = "Monk Beads Diamond";
} else if (id == 12) {
name = "Horns";
} else if (id == 13) {
name = "Halo";
} else if (id == 14) {
name = "Saiki Power";
} else if (id == 15) {
name = "No Face";
}
}
/// @dev The base SVG for the accessory
function base(string memory children) private pure returns (string memory) {
return string(abi.encodePacked('<g id="Accessory">', children, "</g>"));
}
}
// SPDX-License-Identifier: MIT
/// @title Base64
/// @author Brecht Devos - <[email protected]>
/// @notice Provides a function for encoding some bytes in base64
library Base64 {
string internal constant TABLE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
function encode(bytes memory data) internal pure returns (string memory) {
if (data.length == 0) return '';
// load the table into memory
string memory table = TABLE;
// multiply by 4/3 rounded up
uint256 encodedLen = 4 * ((data.length + 2) / 3);
// add some extra buffer at the end required for the writing
string memory result = new string(encodedLen + 32);
assembly {
// set the actual output length
mstore(result, encodedLen)
// prepare the lookup table
let tablePtr := add(table, 1)
// input ptr
let dataPtr := data
let endPtr := add(dataPtr, mload(data))
// result ptr, jump over length
let resultPtr := add(result, 32)
// run over the input, 3 bytes at a time
for {} lt(dataPtr, endPtr) {}
{
dataPtr := add(dataPtr, 3)
// read 3 bytes
let input := mload(dataPtr)
// write 4 characters
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and(shr( 6, input), 0x3F)))))
resultPtr := add(resultPtr, 1)
mstore(resultPtr, shl(248, mload(add(tablePtr, and( input, 0x3F)))))
resultPtr := add(resultPtr, 1)
}
// padding with '='
switch mod(mload(data), 3)
case 1 { mstore(sub(resultPtr, 2), shl(240, 0x3d3d)) }
case 2 { mstore(sub(resultPtr, 1), shl(248, 0x3d)) }
}
return result;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma abicoder v2;
/// @title Color constants
library Colors {
string internal constant BLACK = "33333D";
string internal constant BLACK_DEEP = "000000";
string internal constant BLUE = "7FBCFF";
string internal constant BROWN = "735742";
string internal constant GRAY = "7F8B8C";
string internal constant GREEN = "2FC47A";
string internal constant PINK = "FF78A9";
string internal constant PURPLE = "A839A4";
string internal constant RED = "D9005E";
string internal constant SAIKI = "F02AB6";
string internal constant WHITE = "F7F7F7";
string internal constant YELLOW = "EFED8F";
}
| @dev Generate glasses with the given color and opacity | function glasses(
string memory color,
string memory stroke,
string memory opacity
) private pure returns (string memory) {
return
string(
abi.encodePacked(
'<circle fill="none" stroke="#',
stroke,
'" stroke-miterlimit="10" cx="161.5" cy="201.7" r="23.9"/>',
'<circle fill="none" stroke="#',
stroke,
'" stroke-miterlimit="10" cx="232.9" cy="201.7" r="23.9"/>',
'<circle opacity="',
opacity,
'" fill="#',
color,
'" cx="161.5" cy="201.7" r="23.9"/>',
abi.encodePacked(
'<circle opacity="',
opacity,
'" fill="#',
color,
'" cx="232.9" cy="201.7" r="23.9"/>',
'<path fill="none" stroke="#',
stroke,
'" stroke-miterlimit="10" d="M256.8,201.7l35.8-3.2 M185.5,201.7 c0,0,14.7-3.1,23.5,0 M137.6,201.7l-8.4-3.2"/>'
)
)
);
}
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/**
*Submitted for verification at Etherscan.io on 2021-11-16
*/
/*
____ __ __ __ _
/ __/__ __ ___ / /_ / / ___ / /_ (_)__ __
_\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
/___/
* Synthetix: ExchangerWithFeeRecAlternatives.sol
*
* Latest source (may be newer): https://github.com/Synthetixio/synthetix/blob/master/contracts/ExchangerWithFeeRecAlternatives.sol
* Docs: https://docs.synthetix.io/contracts/ExchangerWithFeeRecAlternatives
*
* Contract Dependencies:
* - Exchanger
* - IAddressResolver
* - IExchanger
* - MinimalProxyFactory
* - MixinResolver
* - MixinSystemSettings
* - Owned
* Libraries:
* - SafeDecimalMath
* - SafeMath
*
* MIT License
* ===========
*
* Copyright (c) 2021 Synthetix
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*/
pragma solidity ^0.5.16;
// https://docs.synthetix.io/contracts/source/contracts/owned
contract Owned {
address public owner;
address public nominatedOwner;
constructor(address _owner) public {
require(_owner != address(0), "Owner address cannot be 0");
owner = _owner;
emit OwnerChanged(address(0), _owner);
}
function nominateNewOwner(address _owner) external onlyOwner {
nominatedOwner = _owner;
emit OwnerNominated(_owner);
}
function acceptOwnership() external {
require(msg.sender == nominatedOwner, "You must be nominated before you can accept ownership");
emit OwnerChanged(owner, nominatedOwner);
owner = nominatedOwner;
nominatedOwner = address(0);
}
modifier onlyOwner {
_onlyOwner();
_;
}
function _onlyOwner() private view {
require(msg.sender == owner, "Only the contract owner may perform this action");
}
event OwnerNominated(address newOwner);
event OwnerChanged(address oldOwner, address newOwner);
}
// https://docs.synthetix.io/contracts/source/interfaces/iaddressresolver
interface IAddressResolver {
function getAddress(bytes32 name) external view returns (address);
function getSynth(bytes32 key) external view returns (address);
function requireAndGetAddress(bytes32 name, string calldata reason) external view returns (address);
}
// https://docs.synthetix.io/contracts/source/interfaces/isynth
interface ISynth {
// Views
function currencyKey() external view returns (bytes32);
function transferableSynths(address account) external view returns (uint);
// Mutative functions
function transferAndSettle(address to, uint value) external returns (bool);
function transferFromAndSettle(
address from,
address to,
uint value
) external returns (bool);
// Restricted: used internally to Synthetix
function burn(address account, uint amount) external;
function issue(address account, uint amount) external;
}
// https://docs.synthetix.io/contracts/source/interfaces/iissuer
interface IIssuer {
// Views
function anySynthOrSNXRateIsInvalid() external view returns (bool anyRateInvalid);
function availableCurrencyKeys() external view returns (bytes32[] memory);
function availableSynthCount() external view returns (uint);
function availableSynths(uint index) external view returns (ISynth);
function canBurnSynths(address account) external view returns (bool);
function collateral(address account) external view returns (uint);
function collateralisationRatio(address issuer) external view returns (uint);
function collateralisationRatioAndAnyRatesInvalid(address _issuer)
external
view
returns (uint cratio, bool anyRateIsInvalid);
function debtBalanceOf(address issuer, bytes32 currencyKey) external view returns (uint debtBalance);
function issuanceRatio() external view returns (uint);
function lastIssueEvent(address account) external view returns (uint);
function maxIssuableSynths(address issuer) external view returns (uint maxIssuable);
function minimumStakeTime() external view returns (uint);
function remainingIssuableSynths(address issuer)
external
view
returns (
uint maxIssuable,
uint alreadyIssued,
uint totalSystemDebt
);
function synths(bytes32 currencyKey) external view returns (ISynth);
function getSynths(bytes32[] calldata currencyKeys) external view returns (ISynth[] memory);
function synthsByAddress(address synthAddress) external view returns (bytes32);
function totalIssuedSynths(bytes32 currencyKey, bool excludeOtherCollateral) external view returns (uint);
function transferableSynthetixAndAnyRateIsInvalid(address account, uint balance)
external
view
returns (uint transferable, bool anyRateIsInvalid);
// Restricted: used internally to Synthetix
function issueSynths(address from, uint amount) external;
function issueSynthsOnBehalf(
address issueFor,
address from,
uint amount
) external;
function issueMaxSynths(address from) external;
function issueMaxSynthsOnBehalf(address issueFor, address from) external;
function burnSynths(address from, uint amount) external;
function burnSynthsOnBehalf(
address burnForAddress,
address from,
uint amount
) external;
function burnSynthsToTarget(address from) external;
function burnSynthsToTargetOnBehalf(address burnForAddress, address from) external;
function burnForRedemption(
address deprecatedSynthProxy,
address account,
uint balance
) external;
function liquidateDelinquentAccount(
address account,
uint susdAmount,
address liquidator
) external returns (uint totalRedeemed, uint amountToLiquidate);
}
// Inheritance
// Internal references
// https://docs.synthetix.io/contracts/source/contracts/addressresolver
contract AddressResolver is Owned, IAddressResolver {
mapping(bytes32 => address) public repository;
constructor(address _owner) public Owned(_owner) {}
/* ========== RESTRICTED FUNCTIONS ========== */
function importAddresses(bytes32[] calldata names, address[] calldata destinations) external onlyOwner {
require(names.length == destinations.length, "Input lengths must match");
for (uint i = 0; i < names.length; i++) {
bytes32 name = names[i];
address destination = destinations[i];
repository[name] = destination;
emit AddressImported(name, destination);
}
}
/* ========= PUBLIC FUNCTIONS ========== */
function rebuildCaches(MixinResolver[] calldata destinations) external {
for (uint i = 0; i < destinations.length; i++) {
destinations[i].rebuildCache();
}
}
/* ========== VIEWS ========== */
function areAddressesImported(bytes32[] calldata names, address[] calldata destinations) external view returns (bool) {
for (uint i = 0; i < names.length; i++) {
if (repository[names[i]] != destinations[i]) {
return false;
}
}
return true;
}
function getAddress(bytes32 name) external view returns (address) {
return repository[name];
}
function requireAndGetAddress(bytes32 name, string calldata reason) external view returns (address) {
address _foundAddress = repository[name];
require(_foundAddress != address(0), reason);
return _foundAddress;
}
function getSynth(bytes32 key) external view returns (address) {
IIssuer issuer = IIssuer(repository["Issuer"]);
require(address(issuer) != address(0), "Cannot find Issuer address");
return address(issuer.synths(key));
}
/* ========== EVENTS ========== */
event AddressImported(bytes32 name, address destination);
}
// Internal references
// https://docs.synthetix.io/contracts/source/contracts/mixinresolver
contract MixinResolver {
AddressResolver public resolver;
mapping(bytes32 => address) private addressCache;
constructor(address _resolver) internal {
resolver = AddressResolver(_resolver);
}
/* ========== INTERNAL FUNCTIONS ========== */
function combineArrays(bytes32[] memory first, bytes32[] memory second)
internal
pure
returns (bytes32[] memory combination)
{
combination = new bytes32[](first.length + second.length);
for (uint i = 0; i < first.length; i++) {
combination[i] = first[i];
}
for (uint j = 0; j < second.length; j++) {
combination[first.length + j] = second[j];
}
}
/* ========== PUBLIC FUNCTIONS ========== */
// Note: this function is public not external in order for it to be overridden and invoked via super in subclasses
function resolverAddressesRequired() public view returns (bytes32[] memory addresses) {}
function rebuildCache() public {
bytes32[] memory requiredAddresses = resolverAddressesRequired();
// The resolver must call this function whenver it updates its state
for (uint i = 0; i < requiredAddresses.length; i++) {
bytes32 name = requiredAddresses[i];
// Note: can only be invoked once the resolver has all the targets needed added
address destination =
resolver.requireAndGetAddress(name, string(abi.encodePacked("Resolver missing target: ", name)));
addressCache[name] = destination;
emit CacheUpdated(name, destination);
}
}
/* ========== VIEWS ========== */
function isResolverCached() external view returns (bool) {
bytes32[] memory requiredAddresses = resolverAddressesRequired();
for (uint i = 0; i < requiredAddresses.length; i++) {
bytes32 name = requiredAddresses[i];
// false if our cache is invalid or if the resolver doesn't have the required address
if (resolver.getAddress(name) != addressCache[name] || addressCache[name] == address(0)) {
return false;
}
}
return true;
}
/* ========== INTERNAL FUNCTIONS ========== */
function requireAndGetAddress(bytes32 name) internal view returns (address) {
address _foundAddress = addressCache[name];
require(_foundAddress != address(0), string(abi.encodePacked("Missing address: ", name)));
return _foundAddress;
}
/* ========== EVENTS ========== */
event CacheUpdated(bytes32 name, address destination);
}
// https://docs.synthetix.io/contracts/source/interfaces/iflexiblestorage
interface IFlexibleStorage {
// Views
function getUIntValue(bytes32 contractName, bytes32 record) external view returns (uint);
function getUIntValues(bytes32 contractName, bytes32[] calldata records) external view returns (uint[] memory);
function getIntValue(bytes32 contractName, bytes32 record) external view returns (int);
function getIntValues(bytes32 contractName, bytes32[] calldata records) external view returns (int[] memory);
function getAddressValue(bytes32 contractName, bytes32 record) external view returns (address);
function getAddressValues(bytes32 contractName, bytes32[] calldata records) external view returns (address[] memory);
function getBoolValue(bytes32 contractName, bytes32 record) external view returns (bool);
function getBoolValues(bytes32 contractName, bytes32[] calldata records) external view returns (bool[] memory);
function getBytes32Value(bytes32 contractName, bytes32 record) external view returns (bytes32);
function getBytes32Values(bytes32 contractName, bytes32[] calldata records) external view returns (bytes32[] memory);
// Mutative functions
function deleteUIntValue(bytes32 contractName, bytes32 record) external;
function deleteIntValue(bytes32 contractName, bytes32 record) external;
function deleteAddressValue(bytes32 contractName, bytes32 record) external;
function deleteBoolValue(bytes32 contractName, bytes32 record) external;
function deleteBytes32Value(bytes32 contractName, bytes32 record) external;
function setUIntValue(
bytes32 contractName,
bytes32 record,
uint value
) external;
function setUIntValues(
bytes32 contractName,
bytes32[] calldata records,
uint[] calldata values
) external;
function setIntValue(
bytes32 contractName,
bytes32 record,
int value
) external;
function setIntValues(
bytes32 contractName,
bytes32[] calldata records,
int[] calldata values
) external;
function setAddressValue(
bytes32 contractName,
bytes32 record,
address value
) external;
function setAddressValues(
bytes32 contractName,
bytes32[] calldata records,
address[] calldata values
) external;
function setBoolValue(
bytes32 contractName,
bytes32 record,
bool value
) external;
function setBoolValues(
bytes32 contractName,
bytes32[] calldata records,
bool[] calldata values
) external;
function setBytes32Value(
bytes32 contractName,
bytes32 record,
bytes32 value
) external;
function setBytes32Values(
bytes32 contractName,
bytes32[] calldata records,
bytes32[] calldata values
) external;
}
// Internal references
// https://docs.synthetix.io/contracts/source/contracts/mixinsystemsettings
contract MixinSystemSettings is MixinResolver {
bytes32 internal constant SETTING_CONTRACT_NAME = "SystemSettings";
bytes32 internal constant SETTING_WAITING_PERIOD_SECS = "waitingPeriodSecs";
bytes32 internal constant SETTING_PRICE_DEVIATION_THRESHOLD_FACTOR = "priceDeviationThresholdFactor";
bytes32 internal constant SETTING_ISSUANCE_RATIO = "issuanceRatio";
bytes32 internal constant SETTING_FEE_PERIOD_DURATION = "feePeriodDuration";
bytes32 internal constant SETTING_TARGET_THRESHOLD = "targetThreshold";
bytes32 internal constant SETTING_LIQUIDATION_DELAY = "liquidationDelay";
bytes32 internal constant SETTING_LIQUIDATION_RATIO = "liquidationRatio";
bytes32 internal constant SETTING_LIQUIDATION_PENALTY = "liquidationPenalty";
bytes32 internal constant SETTING_RATE_STALE_PERIOD = "rateStalePeriod";
bytes32 internal constant SETTING_EXCHANGE_FEE_RATE = "exchangeFeeRate";
bytes32 internal constant SETTING_MINIMUM_STAKE_TIME = "minimumStakeTime";
bytes32 internal constant SETTING_AGGREGATOR_WARNING_FLAGS = "aggregatorWarningFlags";
bytes32 internal constant SETTING_TRADING_REWARDS_ENABLED = "tradingRewardsEnabled";
bytes32 internal constant SETTING_DEBT_SNAPSHOT_STALE_TIME = "debtSnapshotStaleTime";
bytes32 internal constant SETTING_CROSS_DOMAIN_DEPOSIT_GAS_LIMIT = "crossDomainDepositGasLimit";
bytes32 internal constant SETTING_CROSS_DOMAIN_ESCROW_GAS_LIMIT = "crossDomainEscrowGasLimit";
bytes32 internal constant SETTING_CROSS_DOMAIN_REWARD_GAS_LIMIT = "crossDomainRewardGasLimit";
bytes32 internal constant SETTING_CROSS_DOMAIN_WITHDRAWAL_GAS_LIMIT = "crossDomainWithdrawalGasLimit";
bytes32 internal constant SETTING_ETHER_WRAPPER_MAX_ETH = "etherWrapperMaxETH";
bytes32 internal constant SETTING_ETHER_WRAPPER_MINT_FEE_RATE = "etherWrapperMintFeeRate";
bytes32 internal constant SETTING_ETHER_WRAPPER_BURN_FEE_RATE = "etherWrapperBurnFeeRate";
bytes32 internal constant SETTING_WRAPPER_MAX_TOKEN_AMOUNT = "wrapperMaxTokens";
bytes32 internal constant SETTING_WRAPPER_MINT_FEE_RATE = "wrapperMintFeeRate";
bytes32 internal constant SETTING_WRAPPER_BURN_FEE_RATE = "wrapperBurnFeeRate";
bytes32 internal constant SETTING_MIN_CRATIO = "minCratio";
bytes32 internal constant SETTING_NEW_COLLATERAL_MANAGER = "newCollateralManager";
bytes32 internal constant SETTING_INTERACTION_DELAY = "interactionDelay";
bytes32 internal constant SETTING_COLLAPSE_FEE_RATE = "collapseFeeRate";
bytes32 internal constant SETTING_ATOMIC_MAX_VOLUME_PER_BLOCK = "atomicMaxVolumePerBlock";
bytes32 internal constant SETTING_ATOMIC_TWAP_WINDOW = "atomicTwapWindow";
bytes32 internal constant SETTING_ATOMIC_EQUIVALENT_FOR_DEX_PRICING = "atomicEquivalentForDexPricing";
bytes32 internal constant SETTING_ATOMIC_EXCHANGE_FEE_RATE = "atomicExchangeFeeRate";
bytes32 internal constant SETTING_ATOMIC_PRICE_BUFFER = "atomicPriceBuffer";
bytes32 internal constant SETTING_ATOMIC_VOLATILITY_CONSIDERATION_WINDOW = "atomicVolConsiderationWindow";
bytes32 internal constant SETTING_ATOMIC_VOLATILITY_UPDATE_THRESHOLD = "atomicVolUpdateThreshold";
bytes32 internal constant CONTRACT_FLEXIBLESTORAGE = "FlexibleStorage";
enum CrossDomainMessageGasLimits {Deposit, Escrow, Reward, Withdrawal}
constructor(address _resolver) internal MixinResolver(_resolver) {}
function resolverAddressesRequired() public view returns (bytes32[] memory addresses) {
addresses = new bytes32[](1);
addresses[0] = CONTRACT_FLEXIBLESTORAGE;
}
function flexibleStorage() internal view returns (IFlexibleStorage) {
return IFlexibleStorage(requireAndGetAddress(CONTRACT_FLEXIBLESTORAGE));
}
function _getGasLimitSetting(CrossDomainMessageGasLimits gasLimitType) internal pure returns (bytes32) {
if (gasLimitType == CrossDomainMessageGasLimits.Deposit) {
return SETTING_CROSS_DOMAIN_DEPOSIT_GAS_LIMIT;
} else if (gasLimitType == CrossDomainMessageGasLimits.Escrow) {
return SETTING_CROSS_DOMAIN_ESCROW_GAS_LIMIT;
} else if (gasLimitType == CrossDomainMessageGasLimits.Reward) {
return SETTING_CROSS_DOMAIN_REWARD_GAS_LIMIT;
} else if (gasLimitType == CrossDomainMessageGasLimits.Withdrawal) {
return SETTING_CROSS_DOMAIN_WITHDRAWAL_GAS_LIMIT;
} else {
revert("Unknown gas limit type");
}
}
function getCrossDomainMessageGasLimit(CrossDomainMessageGasLimits gasLimitType) internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, _getGasLimitSetting(gasLimitType));
}
function getTradingRewardsEnabled() internal view returns (bool) {
return flexibleStorage().getBoolValue(SETTING_CONTRACT_NAME, SETTING_TRADING_REWARDS_ENABLED);
}
function getWaitingPeriodSecs() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_WAITING_PERIOD_SECS);
}
function getPriceDeviationThresholdFactor() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_PRICE_DEVIATION_THRESHOLD_FACTOR);
}
function getIssuanceRatio() internal view returns (uint) {
// lookup on flexible storage directly for gas savings (rather than via SystemSettings)
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ISSUANCE_RATIO);
}
function getFeePeriodDuration() internal view returns (uint) {
// lookup on flexible storage directly for gas savings (rather than via SystemSettings)
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_FEE_PERIOD_DURATION);
}
function getTargetThreshold() internal view returns (uint) {
// lookup on flexible storage directly for gas savings (rather than via SystemSettings)
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_TARGET_THRESHOLD);
}
function getLiquidationDelay() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_LIQUIDATION_DELAY);
}
function getLiquidationRatio() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_LIQUIDATION_RATIO);
}
function getLiquidationPenalty() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_LIQUIDATION_PENALTY);
}
function getRateStalePeriod() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_RATE_STALE_PERIOD);
}
function getExchangeFeeRate(bytes32 currencyKey) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_EXCHANGE_FEE_RATE, currencyKey))
);
}
function getMinimumStakeTime() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_MINIMUM_STAKE_TIME);
}
function getAggregatorWarningFlags() internal view returns (address) {
return flexibleStorage().getAddressValue(SETTING_CONTRACT_NAME, SETTING_AGGREGATOR_WARNING_FLAGS);
}
function getDebtSnapshotStaleTime() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_DEBT_SNAPSHOT_STALE_TIME);
}
function getEtherWrapperMaxETH() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ETHER_WRAPPER_MAX_ETH);
}
function getEtherWrapperMintFeeRate() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ETHER_WRAPPER_MINT_FEE_RATE);
}
function getEtherWrapperBurnFeeRate() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ETHER_WRAPPER_BURN_FEE_RATE);
}
function getWrapperMaxTokenAmount(address wrapper) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_WRAPPER_MAX_TOKEN_AMOUNT, wrapper))
);
}
function getWrapperMintFeeRate(address wrapper) internal view returns (int) {
return
flexibleStorage().getIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_WRAPPER_MINT_FEE_RATE, wrapper))
);
}
function getWrapperBurnFeeRate(address wrapper) internal view returns (int) {
return
flexibleStorage().getIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_WRAPPER_BURN_FEE_RATE, wrapper))
);
}
function getMinCratio(address collateral) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_MIN_CRATIO, collateral))
);
}
function getNewCollateralManager(address collateral) internal view returns (address) {
return
flexibleStorage().getAddressValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_NEW_COLLATERAL_MANAGER, collateral))
);
}
function getInteractionDelay(address collateral) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_INTERACTION_DELAY, collateral))
);
}
function getCollapseFeeRate(address collateral) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_COLLAPSE_FEE_RATE, collateral))
);
}
function getAtomicMaxVolumePerBlock() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ATOMIC_MAX_VOLUME_PER_BLOCK);
}
function getAtomicTwapWindow() internal view returns (uint) {
return flexibleStorage().getUIntValue(SETTING_CONTRACT_NAME, SETTING_ATOMIC_TWAP_WINDOW);
}
function getAtomicEquivalentForDexPricing(bytes32 currencyKey) internal view returns (address) {
return
flexibleStorage().getAddressValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_ATOMIC_EQUIVALENT_FOR_DEX_PRICING, currencyKey))
);
}
function getAtomicExchangeFeeRate(bytes32 currencyKey) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_ATOMIC_EXCHANGE_FEE_RATE, currencyKey))
);
}
function getAtomicPriceBuffer(bytes32 currencyKey) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_ATOMIC_PRICE_BUFFER, currencyKey))
);
}
function getAtomicVolatilityConsiderationWindow(bytes32 currencyKey) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_ATOMIC_VOLATILITY_CONSIDERATION_WINDOW, currencyKey))
);
}
function getAtomicVolatilityUpdateThreshold(bytes32 currencyKey) internal view returns (uint) {
return
flexibleStorage().getUIntValue(
SETTING_CONTRACT_NAME,
keccak256(abi.encodePacked(SETTING_ATOMIC_VOLATILITY_UPDATE_THRESHOLD, currencyKey))
);
}
}
interface IVirtualSynth {
// Views
function balanceOfUnderlying(address account) external view returns (uint);
function rate() external view returns (uint);
function readyToSettle() external view returns (bool);
function secsLeftInWaitingPeriod() external view returns (uint);
function settled() external view returns (bool);
function synth() external view returns (ISynth);
// Mutative functions
function settle(address account) external;
}
// https://docs.synthetix.io/contracts/source/interfaces/iexchanger
interface IExchanger {
// Views
function calculateAmountAfterSettlement(
address from,
bytes32 currencyKey,
uint amount,
uint refunded
) external view returns (uint amountAfterSettlement);
function isSynthRateInvalid(bytes32 currencyKey) external view returns (bool);
function maxSecsLeftInWaitingPeriod(address account, bytes32 currencyKey) external view returns (uint);
function settlementOwing(address account, bytes32 currencyKey)
external
view
returns (
uint reclaimAmount,
uint rebateAmount,
uint numEntries
);
function hasWaitingPeriodOrSettlementOwing(address account, bytes32 currencyKey) external view returns (bool);
function feeRateForExchange(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey)
external
view
returns (uint exchangeFeeRate);
function getAmountsForExchange(
uint sourceAmount,
bytes32 sourceCurrencyKey,
bytes32 destinationCurrencyKey
)
external
view
returns (
uint amountReceived,
uint fee,
uint exchangeFeeRate
);
function priceDeviationThresholdFactor() external view returns (uint);
function waitingPeriodSecs() external view returns (uint);
// Mutative functions
function exchange(
address exchangeForAddress,
address from,
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey,
address destinationAddress,
bool virtualSynth,
address rewardAddress,
bytes32 trackingCode
) external returns (uint amountReceived, IVirtualSynth vSynth);
function exchangeAtomically(
address from,
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey,
address destinationAddress,
bytes32 trackingCode
) external returns (uint amountReceived);
function settle(address from, bytes32 currencyKey)
external
returns (
uint reclaimed,
uint refunded,
uint numEntries
);
function resetLastExchangeRate(bytes32[] calldata currencyKeys) external;
function suspendSynthWithInvalidRate(bytes32 currencyKey) external;
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath: division by zero");
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, "SafeMath: modulo by zero");
return a % b;
}
}
// Libraries
// https://docs.synthetix.io/contracts/source/libraries/safedecimalmath
library SafeDecimalMath {
using SafeMath for uint;
/* Number of decimal places in the representations. */
uint8 public constant decimals = 18;
uint8 public constant highPrecisionDecimals = 27;
/* The number representing 1.0. */
uint public constant UNIT = 10**uint(decimals);
/* The number representing 1.0 for higher fidelity numbers. */
uint public constant PRECISE_UNIT = 10**uint(highPrecisionDecimals);
uint private constant UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR = 10**uint(highPrecisionDecimals - decimals);
/**
* @return Provides an interface to UNIT.
*/
function unit() external pure returns (uint) {
return UNIT;
}
/**
* @return Provides an interface to PRECISE_UNIT.
*/
function preciseUnit() external pure returns (uint) {
return PRECISE_UNIT;
}
/**
* @return The result of multiplying x and y, interpreting the operands as fixed-point
* decimals.
*
* @dev A unit factor is divided out after the product of x and y is evaluated,
* so that product must be less than 2**256. As this is an integer division,
* the internal division always rounds down. This helps save on gas. Rounding
* is more expensive on gas.
*/
function multiplyDecimal(uint x, uint y) internal pure returns (uint) {
/* Divide by UNIT to remove the extra factor introduced by the product. */
return x.mul(y) / UNIT;
}
/**
* @return The result of safely multiplying x and y, interpreting the operands
* as fixed-point decimals of the specified precision unit.
*
* @dev The operands should be in the form of a the specified unit factor which will be
* divided out after the product of x and y is evaluated, so that product must be
* less than 2**256.
*
* Unlike multiplyDecimal, this function rounds the result to the nearest increment.
* Rounding is useful when you need to retain fidelity for small decimal numbers
* (eg. small fractions or percentages).
*/
function _multiplyDecimalRound(
uint x,
uint y,
uint precisionUnit
) private pure returns (uint) {
/* Divide by UNIT to remove the extra factor introduced by the product. */
uint quotientTimesTen = x.mul(y) / (precisionUnit / 10);
if (quotientTimesTen % 10 >= 5) {
quotientTimesTen += 10;
}
return quotientTimesTen / 10;
}
/**
* @return The result of safely multiplying x and y, interpreting the operands
* as fixed-point decimals of a precise unit.
*
* @dev The operands should be in the precise unit factor which will be
* divided out after the product of x and y is evaluated, so that product must be
* less than 2**256.
*
* Unlike multiplyDecimal, this function rounds the result to the nearest increment.
* Rounding is useful when you need to retain fidelity for small decimal numbers
* (eg. small fractions or percentages).
*/
function multiplyDecimalRoundPrecise(uint x, uint y) internal pure returns (uint) {
return _multiplyDecimalRound(x, y, PRECISE_UNIT);
}
/**
* @return The result of safely multiplying x and y, interpreting the operands
* as fixed-point decimals of a standard unit.
*
* @dev The operands should be in the standard unit factor which will be
* divided out after the product of x and y is evaluated, so that product must be
* less than 2**256.
*
* Unlike multiplyDecimal, this function rounds the result to the nearest increment.
* Rounding is useful when you need to retain fidelity for small decimal numbers
* (eg. small fractions or percentages).
*/
function multiplyDecimalRound(uint x, uint y) internal pure returns (uint) {
return _multiplyDecimalRound(x, y, UNIT);
}
/**
* @return The result of safely dividing x and y. The return value is a high
* precision decimal.
*
* @dev y is divided after the product of x and the standard precision unit
* is evaluated, so the product of x and UNIT must be less than 2**256. As
* this is an integer division, the result is always rounded down.
* This helps save on gas. Rounding is more expensive on gas.
*/
function divideDecimal(uint x, uint y) internal pure returns (uint) {
/* Reintroduce the UNIT factor that will be divided out by y. */
return x.mul(UNIT).div(y);
}
/**
* @return The result of safely dividing x and y. The return value is as a rounded
* decimal in the precision unit specified in the parameter.
*
* @dev y is divided after the product of x and the specified precision unit
* is evaluated, so the product of x and the specified precision unit must
* be less than 2**256. The result is rounded to the nearest increment.
*/
function _divideDecimalRound(
uint x,
uint y,
uint precisionUnit
) private pure returns (uint) {
uint resultTimesTen = x.mul(precisionUnit * 10).div(y);
if (resultTimesTen % 10 >= 5) {
resultTimesTen += 10;
}
return resultTimesTen / 10;
}
/**
* @return The result of safely dividing x and y. The return value is as a rounded
* standard precision decimal.
*
* @dev y is divided after the product of x and the standard precision unit
* is evaluated, so the product of x and the standard precision unit must
* be less than 2**256. The result is rounded to the nearest increment.
*/
function divideDecimalRound(uint x, uint y) internal pure returns (uint) {
return _divideDecimalRound(x, y, UNIT);
}
/**
* @return The result of safely dividing x and y. The return value is as a rounded
* high precision decimal.
*
* @dev y is divided after the product of x and the high precision unit
* is evaluated, so the product of x and the high precision unit must
* be less than 2**256. The result is rounded to the nearest increment.
*/
function divideDecimalRoundPrecise(uint x, uint y) internal pure returns (uint) {
return _divideDecimalRound(x, y, PRECISE_UNIT);
}
/**
* @dev Convert a standard decimal representation to a high precision one.
*/
function decimalToPreciseDecimal(uint i) internal pure returns (uint) {
return i.mul(UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR);
}
/**
* @dev Convert a high precision decimal to a standard decimal representation.
*/
function preciseDecimalToDecimal(uint i) internal pure returns (uint) {
uint quotientTimesTen = i / (UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR / 10);
if (quotientTimesTen % 10 >= 5) {
quotientTimesTen += 10;
}
return quotientTimesTen / 10;
}
// Computes `a - b`, setting the value to 0 if b > a.
function floorsub(uint a, uint b) internal pure returns (uint) {
return b >= a ? 0 : a - b;
}
/* ---------- Utilities ---------- */
/*
* Absolute value of the input, returned as a signed number.
*/
function signedAbs(int x) internal pure returns (int) {
return x < 0 ? -x : x;
}
/*
* Absolute value of the input, returned as an unsigned number.
*/
function abs(int x) internal pure returns (uint) {
return uint(signedAbs(x));
}
}
// https://docs.synthetix.io/contracts/source/interfaces/isystemstatus
interface ISystemStatus {
struct Status {
bool canSuspend;
bool canResume;
}
struct Suspension {
bool suspended;
// reason is an integer code,
// 0 => no reason, 1 => upgrading, 2+ => defined by system usage
uint248 reason;
}
// Views
function accessControl(bytes32 section, address account) external view returns (bool canSuspend, bool canResume);
function requireSystemActive() external view;
function requireIssuanceActive() external view;
function requireExchangeActive() external view;
function requireExchangeBetweenSynthsAllowed(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey) external view;
function requireSynthActive(bytes32 currencyKey) external view;
function requireSynthsActive(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey) external view;
function systemSuspension() external view returns (bool suspended, uint248 reason);
function issuanceSuspension() external view returns (bool suspended, uint248 reason);
function exchangeSuspension() external view returns (bool suspended, uint248 reason);
function synthExchangeSuspension(bytes32 currencyKey) external view returns (bool suspended, uint248 reason);
function synthSuspension(bytes32 currencyKey) external view returns (bool suspended, uint248 reason);
function getSynthExchangeSuspensions(bytes32[] calldata synths)
external
view
returns (bool[] memory exchangeSuspensions, uint256[] memory reasons);
function getSynthSuspensions(bytes32[] calldata synths)
external
view
returns (bool[] memory suspensions, uint256[] memory reasons);
// Restricted functions
function suspendSynth(bytes32 currencyKey, uint256 reason) external;
function updateAccessControl(
bytes32 section,
address account,
bool canSuspend,
bool canResume
) external;
}
// https://docs.synthetix.io/contracts/source/interfaces/ierc20
interface IERC20 {
// ERC20 Optional Views
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
// Views
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
// Mutative functions
function transfer(address to, uint value) external returns (bool);
function approve(address spender, uint value) external returns (bool);
function transferFrom(
address from,
address to,
uint value
) external returns (bool);
// Events
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
// https://docs.synthetix.io/contracts/source/interfaces/iexchangestate
interface IExchangeState {
// Views
struct ExchangeEntry {
bytes32 src;
uint amount;
bytes32 dest;
uint amountReceived;
uint exchangeFeeRate;
uint timestamp;
uint roundIdForSrc;
uint roundIdForDest;
}
function getLengthOfEntries(address account, bytes32 currencyKey) external view returns (uint);
function getEntryAt(
address account,
bytes32 currencyKey,
uint index
)
external
view
returns (
bytes32 src,
uint amount,
bytes32 dest,
uint amountReceived,
uint exchangeFeeRate,
uint timestamp,
uint roundIdForSrc,
uint roundIdForDest
);
function getMaxTimestamp(address account, bytes32 currencyKey) external view returns (uint);
// Mutative functions
function appendExchangeEntry(
address account,
bytes32 src,
uint amount,
bytes32 dest,
uint amountReceived,
uint exchangeFeeRate,
uint timestamp,
uint roundIdForSrc,
uint roundIdForDest
) external;
function removeEntries(address account, bytes32 currencyKey) external;
}
// https://docs.synthetix.io/contracts/source/interfaces/iexchangerates
interface IExchangeRates {
// Structs
struct RateAndUpdatedTime {
uint216 rate;
uint40 time;
}
// Views
function aggregators(bytes32 currencyKey) external view returns (address);
function aggregatorWarningFlags() external view returns (address);
function anyRateIsInvalid(bytes32[] calldata currencyKeys) external view returns (bool);
function currentRoundForRate(bytes32 currencyKey) external view returns (uint);
function currenciesUsingAggregator(address aggregator) external view returns (bytes32[] memory);
function effectiveValue(
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey
) external view returns (uint value);
function effectiveValueAndRates(
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey
)
external
view
returns (
uint value,
uint sourceRate,
uint destinationRate
);
function effectiveAtomicValueAndRates(
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey
)
external
view
returns (
uint value,
uint systemValue,
uint systemSourceRate,
uint systemDestinationRate
);
function effectiveValueAtRound(
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey,
uint roundIdForSrc,
uint roundIdForDest
) external view returns (uint value);
function getCurrentRoundId(bytes32 currencyKey) external view returns (uint);
function getLastRoundIdBeforeElapsedSecs(
bytes32 currencyKey,
uint startingRoundId,
uint startingTimestamp,
uint timediff
) external view returns (uint);
function lastRateUpdateTimes(bytes32 currencyKey) external view returns (uint256);
function oracle() external view returns (address);
function rateAndTimestampAtRound(bytes32 currencyKey, uint roundId) external view returns (uint rate, uint time);
function rateAndUpdatedTime(bytes32 currencyKey) external view returns (uint rate, uint time);
function rateAndInvalid(bytes32 currencyKey) external view returns (uint rate, bool isInvalid);
function rateForCurrency(bytes32 currencyKey) external view returns (uint);
function rateIsFlagged(bytes32 currencyKey) external view returns (bool);
function rateIsInvalid(bytes32 currencyKey) external view returns (bool);
function rateIsStale(bytes32 currencyKey) external view returns (bool);
function rateStalePeriod() external view returns (uint);
function ratesAndUpdatedTimeForCurrencyLastNRounds(bytes32 currencyKey, uint numRounds)
external
view
returns (uint[] memory rates, uint[] memory times);
function ratesAndInvalidForCurrencies(bytes32[] calldata currencyKeys)
external
view
returns (uint[] memory rates, bool anyRateInvalid);
function ratesForCurrencies(bytes32[] calldata currencyKeys) external view returns (uint[] memory);
function synthTooVolatileForAtomicExchange(bytes32 currencyKey) external view returns (bool);
}
// https://docs.synthetix.io/contracts/source/interfaces/isynthetix
interface ISynthetix {
// Views
function anySynthOrSNXRateIsInvalid() external view returns (bool anyRateInvalid);
function availableCurrencyKeys() external view returns (bytes32[] memory);
function availableSynthCount() external view returns (uint);
function availableSynths(uint index) external view returns (ISynth);
function collateral(address account) external view returns (uint);
function collateralisationRatio(address issuer) external view returns (uint);
function debtBalanceOf(address issuer, bytes32 currencyKey) external view returns (uint);
function isWaitingPeriod(bytes32 currencyKey) external view returns (bool);
function maxIssuableSynths(address issuer) external view returns (uint maxIssuable);
function remainingIssuableSynths(address issuer)
external
view
returns (
uint maxIssuable,
uint alreadyIssued,
uint totalSystemDebt
);
function synths(bytes32 currencyKey) external view returns (ISynth);
function synthsByAddress(address synthAddress) external view returns (bytes32);
function totalIssuedSynths(bytes32 currencyKey) external view returns (uint);
function totalIssuedSynthsExcludeOtherCollateral(bytes32 currencyKey) external view returns (uint);
function transferableSynthetix(address account) external view returns (uint transferable);
// Mutative Functions
function burnSynths(uint amount) external;
function burnSynthsOnBehalf(address burnForAddress, uint amount) external;
function burnSynthsToTarget() external;
function burnSynthsToTargetOnBehalf(address burnForAddress) external;
function exchange(
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey
) external returns (uint amountReceived);
function exchangeOnBehalf(
address exchangeForAddress,
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey
) external returns (uint amountReceived);
function exchangeWithTracking(
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey,
address rewardAddress,
bytes32 trackingCode
) external returns (uint amountReceived);
function exchangeWithTrackingForInitiator(
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey,
address rewardAddress,
bytes32 trackingCode
) external returns (uint amountReceived);
function exchangeOnBehalfWithTracking(
address exchangeForAddress,
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey,
address rewardAddress,
bytes32 trackingCode
) external returns (uint amountReceived);
function exchangeWithVirtual(
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey,
bytes32 trackingCode
) external returns (uint amountReceived, IVirtualSynth vSynth);
function exchangeAtomically(
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey,
bytes32 trackingCode
) external returns (uint amountReceived);
function issueMaxSynths() external;
function issueMaxSynthsOnBehalf(address issueForAddress) external;
function issueSynths(uint amount) external;
function issueSynthsOnBehalf(address issueForAddress, uint amount) external;
function mint() external returns (bool);
function settle(bytes32 currencyKey)
external
returns (
uint reclaimed,
uint refunded,
uint numEntries
);
// Liquidations
function liquidateDelinquentAccount(address account, uint susdAmount) external returns (bool);
// Restricted Functions
function mintSecondary(address account, uint amount) external;
function mintSecondaryRewards(uint amount) external;
function burnSecondary(address account, uint amount) external;
}
// https://docs.synthetix.io/contracts/source/interfaces/ifeepool
interface IFeePool {
// Views
// solhint-disable-next-line func-name-mixedcase
function FEE_ADDRESS() external view returns (address);
function feesAvailable(address account) external view returns (uint, uint);
function feePeriodDuration() external view returns (uint);
function isFeesClaimable(address account) external view returns (bool);
function targetThreshold() external view returns (uint);
function totalFeesAvailable() external view returns (uint);
function totalRewardsAvailable() external view returns (uint);
// Mutative Functions
function claimFees() external returns (bool);
function claimOnBehalf(address claimingForAddress) external returns (bool);
function closeCurrentFeePeriod() external;
// Restricted: used internally to Synthetix
function appendAccountIssuanceRecord(
address account,
uint lockedAmount,
uint debtEntryIndex
) external;
function recordFeePaid(uint sUSDAmount) external;
function setRewardsToDistribute(uint amount) external;
}
// https://docs.synthetix.io/contracts/source/interfaces/idelegateapprovals
interface IDelegateApprovals {
// Views
function canBurnFor(address authoriser, address delegate) external view returns (bool);
function canIssueFor(address authoriser, address delegate) external view returns (bool);
function canClaimFor(address authoriser, address delegate) external view returns (bool);
function canExchangeFor(address authoriser, address delegate) external view returns (bool);
// Mutative
function approveAllDelegatePowers(address delegate) external;
function removeAllDelegatePowers(address delegate) external;
function approveBurnOnBehalf(address delegate) external;
function removeBurnOnBehalf(address delegate) external;
function approveIssueOnBehalf(address delegate) external;
function removeIssueOnBehalf(address delegate) external;
function approveClaimOnBehalf(address delegate) external;
function removeClaimOnBehalf(address delegate) external;
function approveExchangeOnBehalf(address delegate) external;
function removeExchangeOnBehalf(address delegate) external;
}
// https://docs.synthetix.io/contracts/source/interfaces/itradingrewards
interface ITradingRewards {
/* ========== VIEWS ========== */
function getAvailableRewards() external view returns (uint);
function getUnassignedRewards() external view returns (uint);
function getRewardsToken() external view returns (address);
function getPeriodController() external view returns (address);
function getCurrentPeriod() external view returns (uint);
function getPeriodIsClaimable(uint periodID) external view returns (bool);
function getPeriodIsFinalized(uint periodID) external view returns (bool);
function getPeriodRecordedFees(uint periodID) external view returns (uint);
function getPeriodTotalRewards(uint periodID) external view returns (uint);
function getPeriodAvailableRewards(uint periodID) external view returns (uint);
function getUnaccountedFeesForAccountForPeriod(address account, uint periodID) external view returns (uint);
function getAvailableRewardsForAccountForPeriod(address account, uint periodID) external view returns (uint);
function getAvailableRewardsForAccountForPeriods(address account, uint[] calldata periodIDs)
external
view
returns (uint totalRewards);
/* ========== MUTATIVE FUNCTIONS ========== */
function claimRewardsForPeriod(uint periodID) external;
function claimRewardsForPeriods(uint[] calldata periodIDs) external;
/* ========== RESTRICTED FUNCTIONS ========== */
function recordExchangeFeeForAccount(uint usdFeeAmount, address account) external;
function closeCurrentPeriodWithRewards(uint rewards) external;
function recoverTokens(address tokenAddress, address recoverAddress) external;
function recoverUnassignedRewardTokens(address recoverAddress) external;
function recoverAssignedRewardTokensAndDestroyPeriod(address recoverAddress, uint periodID) external;
function setPeriodController(address newPeriodController) external;
}
// Inheritance
// Internal references
// https://docs.synthetix.io/contracts/source/contracts/proxy
contract Proxy is Owned {
Proxyable public target;
constructor(address _owner) public Owned(_owner) {}
function setTarget(Proxyable _target) external onlyOwner {
target = _target;
emit TargetUpdated(_target);
}
function _emit(
bytes calldata callData,
uint numTopics,
bytes32 topic1,
bytes32 topic2,
bytes32 topic3,
bytes32 topic4
) external onlyTarget {
uint size = callData.length;
bytes memory _callData = callData;
assembly {
/* The first 32 bytes of callData contain its length (as specified by the abi).
* Length is assumed to be a uint256 and therefore maximum of 32 bytes
* in length. It is also leftpadded to be a multiple of 32 bytes.
* This means moving call_data across 32 bytes guarantees we correctly access
* the data itself. */
switch numTopics
case 0 {
log0(add(_callData, 32), size)
}
case 1 {
log1(add(_callData, 32), size, topic1)
}
case 2 {
log2(add(_callData, 32), size, topic1, topic2)
}
case 3 {
log3(add(_callData, 32), size, topic1, topic2, topic3)
}
case 4 {
log4(add(_callData, 32), size, topic1, topic2, topic3, topic4)
}
}
}
// solhint-disable no-complex-fallback
function() external payable {
// Mutable call setting Proxyable.messageSender as this is using call not delegatecall
target.setMessageSender(msg.sender);
assembly {
let free_ptr := mload(0x40)
calldatacopy(free_ptr, 0, calldatasize)
/* We must explicitly forward ether to the underlying contract as well. */
let result := call(gas, sload(target_slot), callvalue, free_ptr, calldatasize, 0, 0)
returndatacopy(free_ptr, 0, returndatasize)
if iszero(result) {
revert(free_ptr, returndatasize)
}
return(free_ptr, returndatasize)
}
}
modifier onlyTarget {
require(Proxyable(msg.sender) == target, "Must be proxy target");
_;
}
event TargetUpdated(Proxyable newTarget);
}
// Inheritance
// Internal references
// https://docs.synthetix.io/contracts/source/contracts/proxyable
contract Proxyable is Owned {
// This contract should be treated like an abstract contract
/* The proxy this contract exists behind. */
Proxy public proxy;
/* The caller of the proxy, passed through to this contract.
* Note that every function using this member must apply the onlyProxy or
* optionalProxy modifiers, otherwise their invocations can use stale values. */
address public messageSender;
constructor(address payable _proxy) internal {
// This contract is abstract, and thus cannot be instantiated directly
require(owner != address(0), "Owner must be set");
proxy = Proxy(_proxy);
emit ProxyUpdated(_proxy);
}
function setProxy(address payable _proxy) external onlyOwner {
proxy = Proxy(_proxy);
emit ProxyUpdated(_proxy);
}
function setMessageSender(address sender) external onlyProxy {
messageSender = sender;
}
modifier onlyProxy {
_onlyProxy();
_;
}
function _onlyProxy() private view {
require(Proxy(msg.sender) == proxy, "Only the proxy can call");
}
modifier optionalProxy {
_optionalProxy();
_;
}
function _optionalProxy() private {
if (Proxy(msg.sender) != proxy && messageSender != msg.sender) {
messageSender = msg.sender;
}
}
modifier optionalProxy_onlyOwner {
_optionalProxy_onlyOwner();
_;
}
// solhint-disable-next-line func-name-mixedcase
function _optionalProxy_onlyOwner() private {
if (Proxy(msg.sender) != proxy && messageSender != msg.sender) {
messageSender = msg.sender;
}
require(messageSender == owner, "Owner only function");
}
event ProxyUpdated(address proxyAddress);
}
// Inheritance
// Libraries
// Internal references
// Used to have strongly-typed access to internal mutative functions in Synthetix
interface ISynthetixInternal {
function emitExchangeTracking(
bytes32 trackingCode,
bytes32 toCurrencyKey,
uint256 toAmount,
uint256 fee
) external;
function emitSynthExchange(
address account,
bytes32 fromCurrencyKey,
uint fromAmount,
bytes32 toCurrencyKey,
uint toAmount,
address toAddress
) external;
function emitAtomicSynthExchange(
address account,
bytes32 fromCurrencyKey,
uint fromAmount,
bytes32 toCurrencyKey,
uint toAmount,
address toAddress
) external;
function emitExchangeReclaim(
address account,
bytes32 currencyKey,
uint amount
) external;
function emitExchangeRebate(
address account,
bytes32 currencyKey,
uint amount
) external;
}
interface IExchangerInternalDebtCache {
function updateCachedSynthDebtsWithRates(bytes32[] calldata currencyKeys, uint[] calldata currencyRates) external;
function updateCachedSynthDebts(bytes32[] calldata currencyKeys) external;
}
// https://docs.synthetix.io/contracts/source/contracts/exchanger
contract Exchanger is Owned, MixinSystemSettings, IExchanger {
using SafeMath for uint;
using SafeDecimalMath for uint;
struct ExchangeEntrySettlement {
bytes32 src;
uint amount;
bytes32 dest;
uint reclaim;
uint rebate;
uint srcRoundIdAtPeriodEnd;
uint destRoundIdAtPeriodEnd;
uint timestamp;
}
bytes32 public constant CONTRACT_NAME = "Exchanger";
bytes32 internal constant sUSD = "sUSD";
// SIP-65: Decentralized circuit breaker
uint public constant CIRCUIT_BREAKER_SUSPENSION_REASON = 65;
mapping(bytes32 => uint) public lastExchangeRate;
/* ========== ADDRESS RESOLVER CONFIGURATION ========== */
bytes32 private constant CONTRACT_SYSTEMSTATUS = "SystemStatus";
bytes32 private constant CONTRACT_EXCHANGESTATE = "ExchangeState";
bytes32 private constant CONTRACT_EXRATES = "ExchangeRates";
bytes32 private constant CONTRACT_SYNTHETIX = "Synthetix";
bytes32 private constant CONTRACT_FEEPOOL = "FeePool";
bytes32 private constant CONTRACT_TRADING_REWARDS = "TradingRewards";
bytes32 private constant CONTRACT_DELEGATEAPPROVALS = "DelegateApprovals";
bytes32 private constant CONTRACT_ISSUER = "Issuer";
bytes32 private constant CONTRACT_DEBTCACHE = "DebtCache";
constructor(address _owner, address _resolver) public Owned(_owner) MixinSystemSettings(_resolver) {}
/* ========== VIEWS ========== */
function resolverAddressesRequired() public view returns (bytes32[] memory addresses) {
bytes32[] memory existingAddresses = MixinSystemSettings.resolverAddressesRequired();
bytes32[] memory newAddresses = new bytes32[](9);
newAddresses[0] = CONTRACT_SYSTEMSTATUS;
newAddresses[1] = CONTRACT_EXCHANGESTATE;
newAddresses[2] = CONTRACT_EXRATES;
newAddresses[3] = CONTRACT_SYNTHETIX;
newAddresses[4] = CONTRACT_FEEPOOL;
newAddresses[5] = CONTRACT_TRADING_REWARDS;
newAddresses[6] = CONTRACT_DELEGATEAPPROVALS;
newAddresses[7] = CONTRACT_ISSUER;
newAddresses[8] = CONTRACT_DEBTCACHE;
addresses = combineArrays(existingAddresses, newAddresses);
}
function systemStatus() internal view returns (ISystemStatus) {
return ISystemStatus(requireAndGetAddress(CONTRACT_SYSTEMSTATUS));
}
function exchangeState() internal view returns (IExchangeState) {
return IExchangeState(requireAndGetAddress(CONTRACT_EXCHANGESTATE));
}
function exchangeRates() internal view returns (IExchangeRates) {
return IExchangeRates(requireAndGetAddress(CONTRACT_EXRATES));
}
function synthetix() internal view returns (ISynthetix) {
return ISynthetix(requireAndGetAddress(CONTRACT_SYNTHETIX));
}
function feePool() internal view returns (IFeePool) {
return IFeePool(requireAndGetAddress(CONTRACT_FEEPOOL));
}
function tradingRewards() internal view returns (ITradingRewards) {
return ITradingRewards(requireAndGetAddress(CONTRACT_TRADING_REWARDS));
}
function delegateApprovals() internal view returns (IDelegateApprovals) {
return IDelegateApprovals(requireAndGetAddress(CONTRACT_DELEGATEAPPROVALS));
}
function issuer() internal view returns (IIssuer) {
return IIssuer(requireAndGetAddress(CONTRACT_ISSUER));
}
function debtCache() internal view returns (IExchangerInternalDebtCache) {
return IExchangerInternalDebtCache(requireAndGetAddress(CONTRACT_DEBTCACHE));
}
function maxSecsLeftInWaitingPeriod(address account, bytes32 currencyKey) public view returns (uint) {
return secsLeftInWaitingPeriodForExchange(exchangeState().getMaxTimestamp(account, currencyKey));
}
function waitingPeriodSecs() external view returns (uint) {
return getWaitingPeriodSecs();
}
function tradingRewardsEnabled() external view returns (bool) {
return getTradingRewardsEnabled();
}
function priceDeviationThresholdFactor() external view returns (uint) {
return getPriceDeviationThresholdFactor();
}
function settlementOwing(address account, bytes32 currencyKey)
public
view
returns (
uint reclaimAmount,
uint rebateAmount,
uint numEntries
)
{
(reclaimAmount, rebateAmount, numEntries, ) = _settlementOwing(account, currencyKey);
}
// Internal function to aggregate each individual rebate and reclaim entry for a synth
function _settlementOwing(address account, bytes32 currencyKey)
internal
view
returns (
uint reclaimAmount,
uint rebateAmount,
uint numEntries,
ExchangeEntrySettlement[] memory
)
{
// Need to sum up all reclaim and rebate amounts for the user and the currency key
numEntries = exchangeState().getLengthOfEntries(account, currencyKey);
// For each unsettled exchange
ExchangeEntrySettlement[] memory settlements = new ExchangeEntrySettlement[](numEntries);
for (uint i = 0; i < numEntries; i++) {
uint reclaim;
uint rebate;
// fetch the entry from storage
IExchangeState.ExchangeEntry memory exchangeEntry = _getExchangeEntry(account, currencyKey, i);
// determine the last round ids for src and dest pairs when period ended or latest if not over
(uint srcRoundIdAtPeriodEnd, uint destRoundIdAtPeriodEnd) = getRoundIdsAtPeriodEnd(exchangeEntry);
// given these round ids, determine what effective value they should have received
uint destinationAmount =
exchangeRates().effectiveValueAtRound(
exchangeEntry.src,
exchangeEntry.amount,
exchangeEntry.dest,
srcRoundIdAtPeriodEnd,
destRoundIdAtPeriodEnd
);
// and deduct the fee from this amount using the exchangeFeeRate from storage
uint amountShouldHaveReceived = _deductFeesFromAmount(destinationAmount, exchangeEntry.exchangeFeeRate);
// SIP-65 settlements where the amount at end of waiting period is beyond the threshold, then
// settle with no reclaim or rebate
if (!_isDeviationAboveThreshold(exchangeEntry.amountReceived, amountShouldHaveReceived)) {
if (exchangeEntry.amountReceived > amountShouldHaveReceived) {
// if they received more than they should have, add to the reclaim tally
reclaim = exchangeEntry.amountReceived.sub(amountShouldHaveReceived);
reclaimAmount = reclaimAmount.add(reclaim);
} else if (amountShouldHaveReceived > exchangeEntry.amountReceived) {
// if less, add to the rebate tally
rebate = amountShouldHaveReceived.sub(exchangeEntry.amountReceived);
rebateAmount = rebateAmount.add(rebate);
}
}
settlements[i] = ExchangeEntrySettlement({
src: exchangeEntry.src,
amount: exchangeEntry.amount,
dest: exchangeEntry.dest,
reclaim: reclaim,
rebate: rebate,
srcRoundIdAtPeriodEnd: srcRoundIdAtPeriodEnd,
destRoundIdAtPeriodEnd: destRoundIdAtPeriodEnd,
timestamp: exchangeEntry.timestamp
});
}
return (reclaimAmount, rebateAmount, numEntries, settlements);
}
function _getExchangeEntry(
address account,
bytes32 currencyKey,
uint index
) internal view returns (IExchangeState.ExchangeEntry memory) {
(
bytes32 src,
uint amount,
bytes32 dest,
uint amountReceived,
uint exchangeFeeRate,
uint timestamp,
uint roundIdForSrc,
uint roundIdForDest
) = exchangeState().getEntryAt(account, currencyKey, index);
return
IExchangeState.ExchangeEntry({
src: src,
amount: amount,
dest: dest,
amountReceived: amountReceived,
exchangeFeeRate: exchangeFeeRate,
timestamp: timestamp,
roundIdForSrc: roundIdForSrc,
roundIdForDest: roundIdForDest
});
}
function hasWaitingPeriodOrSettlementOwing(address account, bytes32 currencyKey) external view returns (bool) {
if (maxSecsLeftInWaitingPeriod(account, currencyKey) != 0) {
return true;
}
(uint reclaimAmount, , , ) = _settlementOwing(account, currencyKey);
return reclaimAmount > 0;
}
/* ========== SETTERS ========== */
function calculateAmountAfterSettlement(
address from,
bytes32 currencyKey,
uint amount,
uint refunded
) public view returns (uint amountAfterSettlement) {
amountAfterSettlement = amount;
// balance of a synth will show an amount after settlement
uint balanceOfSourceAfterSettlement = IERC20(address(issuer().synths(currencyKey))).balanceOf(from);
// when there isn't enough supply (either due to reclamation settlement or because the number is too high)
if (amountAfterSettlement > balanceOfSourceAfterSettlement) {
// then the amount to exchange is reduced to their remaining supply
amountAfterSettlement = balanceOfSourceAfterSettlement;
}
if (refunded > 0) {
amountAfterSettlement = amountAfterSettlement.add(refunded);
}
}
function isSynthRateInvalid(bytes32 currencyKey) external view returns (bool) {
return _isSynthRateInvalid(currencyKey, exchangeRates().rateForCurrency(currencyKey));
}
/* ========== MUTATIVE FUNCTIONS ========== */
function exchange(
address exchangeForAddress,
address from,
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey,
address destinationAddress,
bool virtualSynth,
address rewardAddress,
bytes32 trackingCode
) external onlySynthetixorSynth returns (uint amountReceived, IVirtualSynth vSynth) {
uint fee;
if (from != exchangeForAddress) {
require(delegateApprovals().canExchangeFor(exchangeForAddress, from), "Not approved to act on behalf");
}
(amountReceived, fee, vSynth) = _exchange(
exchangeForAddress,
sourceCurrencyKey,
sourceAmount,
destinationCurrencyKey,
destinationAddress,
virtualSynth
);
_processTradingRewards(fee, rewardAddress);
if (trackingCode != bytes32(0)) {
_emitTrackingEvent(trackingCode, destinationCurrencyKey, amountReceived, fee);
}
}
function exchangeAtomically(
address,
bytes32,
uint,
bytes32,
address,
bytes32
) external returns (uint) {
_notImplemented();
}
function _emitTrackingEvent(
bytes32 trackingCode,
bytes32 toCurrencyKey,
uint256 toAmount,
uint256 fee
) internal {
ISynthetixInternal(address(synthetix())).emitExchangeTracking(trackingCode, toCurrencyKey, toAmount, fee);
}
function _processTradingRewards(uint fee, address rewardAddress) internal {
if (fee > 0 && rewardAddress != address(0) && getTradingRewardsEnabled()) {
tradingRewards().recordExchangeFeeForAccount(fee, rewardAddress);
}
}
function _suspendIfRateInvalid(bytes32 currencyKey, uint rate) internal returns (bool circuitBroken) {
if (_isSynthRateInvalid(currencyKey, rate)) {
systemStatus().suspendSynth(currencyKey, CIRCUIT_BREAKER_SUSPENSION_REASON);
circuitBroken = true;
} else {
lastExchangeRate[currencyKey] = rate;
}
}
function _updateSNXIssuedDebtOnExchange(bytes32[2] memory currencyKeys, uint[2] memory currencyRates) internal {
bool includesSUSD = currencyKeys[0] == sUSD || currencyKeys[1] == sUSD;
uint numKeys = includesSUSD ? 2 : 3;
bytes32[] memory keys = new bytes32[](numKeys);
keys[0] = currencyKeys[0];
keys[1] = currencyKeys[1];
uint[] memory rates = new uint[](numKeys);
rates[0] = currencyRates[0];
rates[1] = currencyRates[1];
if (!includesSUSD) {
keys[2] = sUSD; // And we'll also update sUSD to account for any fees if it wasn't one of the exchanged currencies
rates[2] = SafeDecimalMath.unit();
}
// Note that exchanges can't invalidate the debt cache, since if a rate is invalid,
// the exchange will have failed already.
debtCache().updateCachedSynthDebtsWithRates(keys, rates);
}
function _settleAndCalcSourceAmountRemaining(
uint sourceAmount,
address from,
bytes32 sourceCurrencyKey
) internal returns (uint sourceAmountAfterSettlement) {
(, uint refunded, uint numEntriesSettled) = _internalSettle(from, sourceCurrencyKey, false);
sourceAmountAfterSettlement = sourceAmount;
// when settlement was required
if (numEntriesSettled > 0) {
// ensure the sourceAmount takes this into account
sourceAmountAfterSettlement = calculateAmountAfterSettlement(from, sourceCurrencyKey, sourceAmount, refunded);
}
}
function _exchange(
address from,
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey,
address destinationAddress,
bool virtualSynth
)
internal
returns (
uint amountReceived,
uint fee,
IVirtualSynth vSynth
)
{
_ensureCanExchange(sourceCurrencyKey, sourceAmount, destinationCurrencyKey);
uint sourceAmountAfterSettlement = _settleAndCalcSourceAmountRemaining(sourceAmount, from, sourceCurrencyKey);
// If, after settlement the user has no balance left (highly unlikely), then return to prevent
// emitting events of 0 and don't revert so as to ensure the settlement queue is emptied
if (sourceAmountAfterSettlement == 0) {
return (0, 0, IVirtualSynth(0));
}
uint exchangeFeeRate;
uint sourceRate;
uint destinationRate;
// Note: `fee` is denominated in the destinationCurrencyKey.
(amountReceived, fee, exchangeFeeRate, sourceRate, destinationRate) = _getAmountsForExchangeMinusFees(
sourceAmountAfterSettlement,
sourceCurrencyKey,
destinationCurrencyKey
);
// SIP-65: Decentralized Circuit Breaker
if (
_suspendIfRateInvalid(sourceCurrencyKey, sourceRate) ||
_suspendIfRateInvalid(destinationCurrencyKey, destinationRate)
) {
return (0, 0, IVirtualSynth(0));
}
// Note: We don't need to check their balance as the _convert() below will do a safe subtraction which requires
// the subtraction to not overflow, which would happen if their balance is not sufficient.
vSynth = _convert(
sourceCurrencyKey,
from,
sourceAmountAfterSettlement,
destinationCurrencyKey,
amountReceived,
destinationAddress,
virtualSynth
);
// When using a virtual synth, it becomes the destinationAddress for event and settlement tracking
if (vSynth != IVirtualSynth(0)) {
destinationAddress = address(vSynth);
}
// Remit the fee if required
if (fee > 0) {
// Normalize fee to sUSD
// Note: `fee` is being reused to avoid stack too deep errors.
fee = exchangeRates().effectiveValue(destinationCurrencyKey, fee, sUSD);
// Remit the fee in sUSDs
issuer().synths(sUSD).issue(feePool().FEE_ADDRESS(), fee);
// Tell the fee pool about this
feePool().recordFeePaid(fee);
}
// Note: As of this point, `fee` is denominated in sUSD.
// Nothing changes as far as issuance data goes because the total value in the system hasn't changed.
// But we will update the debt snapshot in case exchange rates have fluctuated since the last exchange
// in these currencies
_updateSNXIssuedDebtOnExchange([sourceCurrencyKey, destinationCurrencyKey], [sourceRate, destinationRate]);
// Let the DApps know there was a Synth exchange
ISynthetixInternal(address(synthetix())).emitSynthExchange(
from,
sourceCurrencyKey,
sourceAmountAfterSettlement,
destinationCurrencyKey,
amountReceived,
destinationAddress
);
// iff the waiting period is gt 0
if (getWaitingPeriodSecs() > 0) {
// persist the exchange information for the dest key
appendExchange(
destinationAddress,
sourceCurrencyKey,
sourceAmountAfterSettlement,
destinationCurrencyKey,
amountReceived,
exchangeFeeRate
);
}
}
function _convert(
bytes32 sourceCurrencyKey,
address from,
uint sourceAmountAfterSettlement,
bytes32 destinationCurrencyKey,
uint amountReceived,
address recipient,
bool virtualSynth
) internal returns (IVirtualSynth vSynth) {
// Burn the source amount
issuer().synths(sourceCurrencyKey).burn(from, sourceAmountAfterSettlement);
// Issue their new synths
ISynth dest = issuer().synths(destinationCurrencyKey);
if (virtualSynth) {
Proxyable synth = Proxyable(address(dest));
vSynth = _createVirtualSynth(IERC20(address(synth.proxy())), recipient, amountReceived, destinationCurrencyKey);
dest.issue(address(vSynth), amountReceived);
} else {
dest.issue(recipient, amountReceived);
}
}
function _createVirtualSynth(
IERC20,
address,
uint,
bytes32
) internal returns (IVirtualSynth) {
_notImplemented();
}
// Note: this function can intentionally be called by anyone on behalf of anyone else (the caller just pays the gas)
function settle(address from, bytes32 currencyKey)
external
returns (
uint reclaimed,
uint refunded,
uint numEntriesSettled
)
{
systemStatus().requireSynthActive(currencyKey);
return _internalSettle(from, currencyKey, true);
}
function suspendSynthWithInvalidRate(bytes32 currencyKey) external {
systemStatus().requireSystemActive();
require(issuer().synths(currencyKey) != ISynth(0), "No such synth");
require(_isSynthRateInvalid(currencyKey, exchangeRates().rateForCurrency(currencyKey)), "Synth price is valid");
systemStatus().suspendSynth(currencyKey, CIRCUIT_BREAKER_SUSPENSION_REASON);
}
// SIP-139
function resetLastExchangeRate(bytes32[] calldata currencyKeys) external onlyOwner {
(uint[] memory rates, bool anyRateInvalid) = exchangeRates().ratesAndInvalidForCurrencies(currencyKeys);
require(!anyRateInvalid, "Rates for given synths not valid");
for (uint i = 0; i < currencyKeys.length; i++) {
lastExchangeRate[currencyKeys[i]] = rates[i];
}
}
/* ========== INTERNAL FUNCTIONS ========== */
function _ensureCanExchange(
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey
) internal view {
require(sourceCurrencyKey != destinationCurrencyKey, "Can't be same synth");
require(sourceAmount > 0, "Zero amount");
bytes32[] memory synthKeys = new bytes32[](2);
synthKeys[0] = sourceCurrencyKey;
synthKeys[1] = destinationCurrencyKey;
require(!exchangeRates().anyRateIsInvalid(synthKeys), "Src/dest rate invalid or not found");
}
function _isSynthRateInvalid(bytes32 currencyKey, uint currentRate) internal view returns (bool) {
if (currentRate == 0) {
return true;
}
uint lastRateFromExchange = lastExchangeRate[currencyKey];
if (lastRateFromExchange > 0) {
return _isDeviationAboveThreshold(lastRateFromExchange, currentRate);
}
// if no last exchange for this synth, then we need to look up last 3 rates (+1 for current rate)
(uint[] memory rates, ) = exchangeRates().ratesAndUpdatedTimeForCurrencyLastNRounds(currencyKey, 4);
// start at index 1 to ignore current rate
for (uint i = 1; i < rates.length; i++) {
// ignore any empty rates in the past (otherwise we will never be able to get validity)
if (rates[i] > 0 && _isDeviationAboveThreshold(rates[i], currentRate)) {
return true;
}
}
return false;
}
function _isDeviationAboveThreshold(uint base, uint comparison) internal view returns (bool) {
if (base == 0 || comparison == 0) {
return true;
}
uint factor;
if (comparison > base) {
factor = comparison.divideDecimal(base);
} else {
factor = base.divideDecimal(comparison);
}
return factor >= getPriceDeviationThresholdFactor();
}
function _internalSettle(
address from,
bytes32 currencyKey,
bool updateCache
)
internal
returns (
uint reclaimed,
uint refunded,
uint numEntriesSettled
)
{
require(maxSecsLeftInWaitingPeriod(from, currencyKey) == 0, "Cannot settle during waiting period");
(uint reclaimAmount, uint rebateAmount, uint entries, ExchangeEntrySettlement[] memory settlements) =
_settlementOwing(from, currencyKey);
if (reclaimAmount > rebateAmount) {
reclaimed = reclaimAmount.sub(rebateAmount);
reclaim(from, currencyKey, reclaimed);
} else if (rebateAmount > reclaimAmount) {
refunded = rebateAmount.sub(reclaimAmount);
refund(from, currencyKey, refunded);
}
// by checking a reclaim or refund we also check that the currency key is still a valid synth,
// as the deviation check will return 0 if the synth has been removed.
if (updateCache && (reclaimed > 0 || refunded > 0)) {
bytes32[] memory key = new bytes32[](1);
key[0] = currencyKey;
debtCache().updateCachedSynthDebts(key);
}
// emit settlement event for each settled exchange entry
for (uint i = 0; i < settlements.length; i++) {
emit ExchangeEntrySettled(
from,
settlements[i].src,
settlements[i].amount,
settlements[i].dest,
settlements[i].reclaim,
settlements[i].rebate,
settlements[i].srcRoundIdAtPeriodEnd,
settlements[i].destRoundIdAtPeriodEnd,
settlements[i].timestamp
);
}
numEntriesSettled = entries;
// Now remove all entries, even if no reclaim and no rebate
exchangeState().removeEntries(from, currencyKey);
}
function reclaim(
address from,
bytes32 currencyKey,
uint amount
) internal {
// burn amount from user
issuer().synths(currencyKey).burn(from, amount);
ISynthetixInternal(address(synthetix())).emitExchangeReclaim(from, currencyKey, amount);
}
function refund(
address from,
bytes32 currencyKey,
uint amount
) internal {
// issue amount to user
issuer().synths(currencyKey).issue(from, amount);
ISynthetixInternal(address(synthetix())).emitExchangeRebate(from, currencyKey, amount);
}
function secsLeftInWaitingPeriodForExchange(uint timestamp) internal view returns (uint) {
uint _waitingPeriodSecs = getWaitingPeriodSecs();
if (timestamp == 0 || now >= timestamp.add(_waitingPeriodSecs)) {
return 0;
}
return timestamp.add(_waitingPeriodSecs).sub(now);
}
function feeRateForExchange(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey)
external
view
returns (uint exchangeFeeRate)
{
exchangeFeeRate = _feeRateForExchange(sourceCurrencyKey, destinationCurrencyKey);
}
function _feeRateForExchange(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey) internal view returns (uint) {
// Get the exchange fee rate as per destination currencyKey
uint baseRate = getExchangeFeeRate(destinationCurrencyKey);
return _calculateFeeRateFromExchangeSynths(baseRate, sourceCurrencyKey, destinationCurrencyKey);
}
function _calculateFeeRateFromExchangeSynths(
uint exchangeFeeRate,
bytes32 sourceCurrencyKey,
bytes32 destinationCurrencyKey
) internal pure returns (uint) {
if (sourceCurrencyKey == sUSD || destinationCurrencyKey == sUSD) {
return exchangeFeeRate;
}
// Is this a swing trade? long to short or short to long skipping sUSD.
if (
(sourceCurrencyKey[0] == 0x73 && destinationCurrencyKey[0] == 0x69) ||
(sourceCurrencyKey[0] == 0x69 && destinationCurrencyKey[0] == 0x73)
) {
// Double the exchange fee
return exchangeFeeRate.mul(2);
}
return exchangeFeeRate;
}
function getAmountsForExchange(
uint sourceAmount,
bytes32 sourceCurrencyKey,
bytes32 destinationCurrencyKey
)
external
view
returns (
uint amountReceived,
uint fee,
uint exchangeFeeRate
)
{
(amountReceived, fee, exchangeFeeRate, , ) = _getAmountsForExchangeMinusFees(
sourceAmount,
sourceCurrencyKey,
destinationCurrencyKey
);
}
function _getAmountsForExchangeMinusFees(
uint sourceAmount,
bytes32 sourceCurrencyKey,
bytes32 destinationCurrencyKey
)
internal
view
returns (
uint amountReceived,
uint fee,
uint exchangeFeeRate,
uint sourceRate,
uint destinationRate
)
{
uint destinationAmount;
(destinationAmount, sourceRate, destinationRate) = exchangeRates().effectiveValueAndRates(
sourceCurrencyKey,
sourceAmount,
destinationCurrencyKey
);
exchangeFeeRate = _feeRateForExchange(sourceCurrencyKey, destinationCurrencyKey);
amountReceived = _deductFeesFromAmount(destinationAmount, exchangeFeeRate);
fee = destinationAmount.sub(amountReceived);
}
function _deductFeesFromAmount(uint destinationAmount, uint exchangeFeeRate)
internal
pure
returns (uint amountReceived)
{
amountReceived = destinationAmount.multiplyDecimal(SafeDecimalMath.unit().sub(exchangeFeeRate));
}
function appendExchange(
address account,
bytes32 src,
uint amount,
bytes32 dest,
uint amountReceived,
uint exchangeFeeRate
) internal {
IExchangeRates exRates = exchangeRates();
uint roundIdForSrc = exRates.getCurrentRoundId(src);
uint roundIdForDest = exRates.getCurrentRoundId(dest);
exchangeState().appendExchangeEntry(
account,
src,
amount,
dest,
amountReceived,
exchangeFeeRate,
now,
roundIdForSrc,
roundIdForDest
);
emit ExchangeEntryAppended(
account,
src,
amount,
dest,
amountReceived,
exchangeFeeRate,
roundIdForSrc,
roundIdForDest
);
}
function getRoundIdsAtPeriodEnd(IExchangeState.ExchangeEntry memory exchangeEntry)
internal
view
returns (uint srcRoundIdAtPeriodEnd, uint destRoundIdAtPeriodEnd)
{
IExchangeRates exRates = exchangeRates();
uint _waitingPeriodSecs = getWaitingPeriodSecs();
srcRoundIdAtPeriodEnd = exRates.getLastRoundIdBeforeElapsedSecs(
exchangeEntry.src,
exchangeEntry.roundIdForSrc,
exchangeEntry.timestamp,
_waitingPeriodSecs
);
destRoundIdAtPeriodEnd = exRates.getLastRoundIdBeforeElapsedSecs(
exchangeEntry.dest,
exchangeEntry.roundIdForDest,
exchangeEntry.timestamp,
_waitingPeriodSecs
);
}
function _notImplemented() internal pure {
revert("Cannot be run on this layer");
}
// ========== MODIFIERS ==========
modifier onlySynthetixorSynth() {
ISynthetix _synthetix = synthetix();
require(
msg.sender == address(_synthetix) || _synthetix.synthsByAddress(msg.sender) != bytes32(0),
"Exchanger: Only synthetix or a synth contract can perform this action"
);
_;
}
// ========== EVENTS ==========
event ExchangeEntryAppended(
address indexed account,
bytes32 src,
uint256 amount,
bytes32 dest,
uint256 amountReceived,
uint256 exchangeFeeRate,
uint256 roundIdForSrc,
uint256 roundIdForDest
);
event ExchangeEntrySettled(
address indexed from,
bytes32 src,
uint256 amount,
bytes32 dest,
uint256 reclaim,
uint256 rebate,
uint256 srcRoundIdAtPeriodEnd,
uint256 destRoundIdAtPeriodEnd,
uint256 exchangeTimestamp
);
}
// https://docs.synthetix.io/contracts/source/contracts/minimalproxyfactory
contract MinimalProxyFactory {
function _cloneAsMinimalProxy(address _base, string memory _revertMsg) internal returns (address clone) {
bytes memory createData = _generateMinimalProxyCreateData(_base);
assembly {
clone := create(
0, // no value
add(createData, 0x20), // data
55 // data is always 55 bytes (10 constructor + 45 code)
)
}
// If CREATE fails for some reason, address(0) is returned
require(clone != address(0), _revertMsg);
}
function _generateMinimalProxyCreateData(address _base) internal pure returns (bytes memory) {
return
abi.encodePacked(
//---- constructor -----
bytes10(0x3d602d80600a3d3981f3),
//---- proxy code -----
bytes10(0x363d3d373d3d3d363d73),
_base,
bytes15(0x5af43d82803e903d91602b57fd5bf3)
);
}
}
// Inheritance
// Internal references
interface IVirtualSynthInternal {
function initialize(
IERC20 _synth,
IAddressResolver _resolver,
address _recipient,
uint _amount,
bytes32 _currencyKey
) external;
}
// https://docs.synthetix.io/contracts/source/contracts/exchangerwithfeereclamationalternatives
contract ExchangerWithFeeRecAlternatives is MinimalProxyFactory, Exchanger {
bytes32 public constant CONTRACT_NAME = "ExchangerWithFeeRecAlternatives";
using SafeMath for uint;
struct ExchangeVolumeAtPeriod {
uint64 time;
uint192 volume;
}
ExchangeVolumeAtPeriod public lastAtomicVolume;
constructor(address _owner, address _resolver) public MinimalProxyFactory() Exchanger(_owner, _resolver) {}
/* ========== ADDRESS RESOLVER CONFIGURATION ========== */
bytes32 private constant CONTRACT_VIRTUALSYNTH_MASTERCOPY = "VirtualSynthMastercopy";
function resolverAddressesRequired() public view returns (bytes32[] memory addresses) {
bytes32[] memory existingAddresses = Exchanger.resolverAddressesRequired();
bytes32[] memory newAddresses = new bytes32[](1);
newAddresses[0] = CONTRACT_VIRTUALSYNTH_MASTERCOPY;
addresses = combineArrays(existingAddresses, newAddresses);
}
/* ========== VIEWS ========== */
function atomicMaxVolumePerBlock() external view returns (uint) {
return getAtomicMaxVolumePerBlock();
}
function feeRateForAtomicExchange(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey)
external
view
returns (uint exchangeFeeRate)
{
exchangeFeeRate = _feeRateForAtomicExchange(sourceCurrencyKey, destinationCurrencyKey);
}
function getAmountsForAtomicExchange(
uint sourceAmount,
bytes32 sourceCurrencyKey,
bytes32 destinationCurrencyKey
)
external
view
returns (
uint amountReceived,
uint fee,
uint exchangeFeeRate
)
{
(amountReceived, fee, exchangeFeeRate, , , ) = _getAmountsForAtomicExchangeMinusFees(
sourceAmount,
sourceCurrencyKey,
destinationCurrencyKey
);
}
/* ========== MUTATIVE FUNCTIONS ========== */
function exchangeAtomically(
address from,
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey,
address destinationAddress,
bytes32 trackingCode
) external onlySynthetixorSynth returns (uint amountReceived) {
uint fee;
(amountReceived, fee) = _exchangeAtomically(
from,
sourceCurrencyKey,
sourceAmount,
destinationCurrencyKey,
destinationAddress
);
_processTradingRewards(fee, destinationAddress);
if (trackingCode != bytes32(0)) {
_emitTrackingEvent(trackingCode, destinationCurrencyKey, amountReceived, fee);
}
}
/* ========== INTERNAL FUNCTIONS ========== */
function _virtualSynthMastercopy() internal view returns (address) {
return requireAndGetAddress(CONTRACT_VIRTUALSYNTH_MASTERCOPY);
}
function _createVirtualSynth(
IERC20 synth,
address recipient,
uint amount,
bytes32 currencyKey
) internal returns (IVirtualSynth) {
// prevent inverse synths from being allowed due to purgeability
require(currencyKey[0] != 0x69, "Cannot virtualize this synth");
IVirtualSynthInternal vSynth =
IVirtualSynthInternal(_cloneAsMinimalProxy(_virtualSynthMastercopy(), "Could not create new vSynth"));
vSynth.initialize(synth, resolver, recipient, amount, currencyKey);
emit VirtualSynthCreated(address(synth), recipient, address(vSynth), currencyKey, amount);
return IVirtualSynth(address(vSynth));
}
function _exchangeAtomically(
address from,
bytes32 sourceCurrencyKey,
uint sourceAmount,
bytes32 destinationCurrencyKey,
address destinationAddress
) internal returns (uint amountReceived, uint fee) {
_ensureCanExchange(sourceCurrencyKey, sourceAmount, destinationCurrencyKey);
// One of src/dest synth must be sUSD (checked below for gas optimization reasons)
require(
!exchangeRates().synthTooVolatileForAtomicExchange(
sourceCurrencyKey == sUSD ? destinationCurrencyKey : sourceCurrencyKey
),
"Src/dest synth too volatile"
);
uint sourceAmountAfterSettlement = _settleAndCalcSourceAmountRemaining(sourceAmount, from, sourceCurrencyKey);
// If, after settlement the user has no balance left (highly unlikely), then return to prevent
// emitting events of 0 and don't revert so as to ensure the settlement queue is emptied
if (sourceAmountAfterSettlement == 0) {
return (0, 0);
}
uint exchangeFeeRate;
uint systemConvertedAmount;
uint systemSourceRate;
uint systemDestinationRate;
// Note: also ensures the given synths are allowed to be atomically exchanged
(
amountReceived, // output amount with fee taken out (denominated in dest currency)
fee, // fee amount (denominated in dest currency)
exchangeFeeRate, // applied fee rate
systemConvertedAmount, // current system value without fees (denominated in dest currency)
systemSourceRate, // current system rate for src currency
systemDestinationRate // current system rate for dest currency
) = _getAmountsForAtomicExchangeMinusFees(sourceAmountAfterSettlement, sourceCurrencyKey, destinationCurrencyKey);
// SIP-65: Decentralized Circuit Breaker (checking current system rates)
if (
_suspendIfRateInvalid(sourceCurrencyKey, systemSourceRate) ||
_suspendIfRateInvalid(destinationCurrencyKey, systemDestinationRate)
) {
return (0, 0);
}
// Sanity check atomic output's value against current system value (checking atomic rates)
require(
!_isDeviationAboveThreshold(systemConvertedAmount, amountReceived.add(fee)),
"Atomic rate deviates too much"
);
// Ensure src/dest synth is sUSD and determine sUSD value of exchange
uint sourceSusdValue;
if (sourceCurrencyKey == sUSD) {
// Use after-settled amount as this is amount converted (not sourceAmount)
sourceSusdValue = sourceAmountAfterSettlement;
} else if (destinationCurrencyKey == sUSD) {
// In this case the systemConvertedAmount would be the fee-free sUSD value of the source synth
sourceSusdValue = systemConvertedAmount;
} else {
revert("Src/dest synth must be sUSD");
}
// Check and update atomic volume limit
_checkAndUpdateAtomicVolume(sourceSusdValue);
// Note: We don't need to check their balance as the _convert() below will do a safe subtraction which requires
// the subtraction to not overflow, which would happen if their balance is not sufficient.
_convert(
sourceCurrencyKey,
from,
sourceAmountAfterSettlement,
destinationCurrencyKey,
amountReceived,
destinationAddress,
false // no vsynths
);
// Remit the fee if required
if (fee > 0) {
// Normalize fee to sUSD
// Note: `fee` is being reused to avoid stack too deep errors.
fee = exchangeRates().effectiveValue(destinationCurrencyKey, fee, sUSD);
// Remit the fee in sUSDs
issuer().synths(sUSD).issue(feePool().FEE_ADDRESS(), fee);
// Tell the fee pool about this
feePool().recordFeePaid(fee);
}
// Note: As of this point, `fee` is denominated in sUSD.
// Note: this update of the debt snapshot will not be accurate because the atomic exchange
// was executed with a different rate than the system rate. To be perfect, issuance data,
// priced in system rates, should have been adjusted on the src and dest synth.
// The debt pool is expected to be deprecated soon, and so we don't bother with being
// perfect here. For now, an inaccuracy will slowly accrue over time with increasing atomic
// exchange volume.
_updateSNXIssuedDebtOnExchange(
[sourceCurrencyKey, destinationCurrencyKey],
[systemSourceRate, systemDestinationRate]
);
// Let the DApps know there was a Synth exchange
ISynthetixInternal(address(synthetix())).emitSynthExchange(
from,
sourceCurrencyKey,
sourceAmountAfterSettlement,
destinationCurrencyKey,
amountReceived,
destinationAddress
);
// Emit separate event to track atomic exchanges
ISynthetixInternal(address(synthetix())).emitAtomicSynthExchange(
from,
sourceCurrencyKey,
sourceAmountAfterSettlement,
destinationCurrencyKey,
amountReceived,
destinationAddress
);
// No need to persist any exchange information, as no settlement is required for atomic exchanges
}
function _checkAndUpdateAtomicVolume(uint sourceSusdValue) internal {
uint currentVolume =
uint(lastAtomicVolume.time) == block.timestamp
? uint(lastAtomicVolume.volume).add(sourceSusdValue)
: sourceSusdValue;
require(currentVolume <= getAtomicMaxVolumePerBlock(), "Surpassed volume limit");
lastAtomicVolume.time = uint64(block.timestamp);
lastAtomicVolume.volume = uint192(currentVolume); // Protected by volume limit check above
}
function _feeRateForAtomicExchange(bytes32 sourceCurrencyKey, bytes32 destinationCurrencyKey)
internal
view
returns (uint)
{
// Get the exchange fee rate as per destination currencyKey
uint baseRate = getAtomicExchangeFeeRate(destinationCurrencyKey);
if (baseRate == 0) {
// If no atomic rate was set, fallback to the regular exchange rate
baseRate = getExchangeFeeRate(destinationCurrencyKey);
}
return _calculateFeeRateFromExchangeSynths(baseRate, sourceCurrencyKey, destinationCurrencyKey);
}
function _getAmountsForAtomicExchangeMinusFees(
uint sourceAmount,
bytes32 sourceCurrencyKey,
bytes32 destinationCurrencyKey
)
internal
view
returns (
uint amountReceived,
uint fee,
uint exchangeFeeRate,
uint systemConvertedAmount,
uint systemSourceRate,
uint systemDestinationRate
)
{
uint destinationAmount;
(destinationAmount, systemConvertedAmount, systemSourceRate, systemDestinationRate) = exchangeRates()
.effectiveAtomicValueAndRates(sourceCurrencyKey, sourceAmount, destinationCurrencyKey);
exchangeFeeRate = _feeRateForAtomicExchange(sourceCurrencyKey, destinationCurrencyKey);
amountReceived = _deductFeesFromAmount(destinationAmount, exchangeFeeRate);
fee = destinationAmount.sub(amountReceived);
}
event VirtualSynthCreated(
address indexed synth,
address indexed recipient,
address vSynth,
bytes32 currencyKey,
uint amount
);
} | Internal function to aggregate each individual rebate and reclaim entry for a synth Need to sum up all reclaim and rebate amounts for the user and the currency key For each unsettled exchange fetch the entry from storage determine the last round ids for src and dest pairs when period ended or latest if not over given these round ids, determine what effective value they should have received and deduct the fee from this amount using the exchangeFeeRate from storage SIP-65 settlements where the amount at end of waiting period is beyond the threshold, then settle with no reclaim or rebate if they received more than they should have, add to the reclaim tally if less, add to the rebate tally | function _settlementOwing(address account, bytes32 currencyKey)
internal
view
returns (
uint reclaimAmount,
uint rebateAmount,
uint numEntries,
ExchangeEntrySettlement[] memory
)
{
numEntries = exchangeState().getLengthOfEntries(account, currencyKey);
ExchangeEntrySettlement[] memory settlements = new ExchangeEntrySettlement[](numEntries);
for (uint i = 0; i < numEntries; i++) {
uint reclaim;
uint rebate;
IExchangeState.ExchangeEntry memory exchangeEntry = _getExchangeEntry(account, currencyKey, i);
(uint srcRoundIdAtPeriodEnd, uint destRoundIdAtPeriodEnd) = getRoundIdsAtPeriodEnd(exchangeEntry);
uint destinationAmount =
exchangeRates().effectiveValueAtRound(
exchangeEntry.src,
exchangeEntry.amount,
exchangeEntry.dest,
srcRoundIdAtPeriodEnd,
destRoundIdAtPeriodEnd
);
uint amountShouldHaveReceived = _deductFeesFromAmount(destinationAmount, exchangeEntry.exchangeFeeRate);
if (!_isDeviationAboveThreshold(exchangeEntry.amountReceived, amountShouldHaveReceived)) {
if (exchangeEntry.amountReceived > amountShouldHaveReceived) {
reclaim = exchangeEntry.amountReceived.sub(amountShouldHaveReceived);
reclaimAmount = reclaimAmount.add(reclaim);
rebate = amountShouldHaveReceived.sub(exchangeEntry.amountReceived);
rebateAmount = rebateAmount.add(rebate);
}
}
settlements[i] = ExchangeEntrySettlement({
src: exchangeEntry.src,
amount: exchangeEntry.amount,
dest: exchangeEntry.dest,
reclaim: reclaim,
rebate: rebate,
srcRoundIdAtPeriodEnd: srcRoundIdAtPeriodEnd,
destRoundIdAtPeriodEnd: destRoundIdAtPeriodEnd,
timestamp: exchangeEntry.timestamp
});
}
return (reclaimAmount, rebateAmount, numEntries, settlements);
}
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// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.0;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
* @title ERC20 interface
* @dev see https://eips.ethereum.org/EIPS/eip-20
*/
interface IERC20 {
function transfer(address to, uint256 value) external returns (bool);
function approve(address spender, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 value) external returns (bool);
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title ERC20 Airdrop dapp smart contract
*/
contract Airdrop is Ownable {
using SafeMath for uint;
IERC20 public token;
uint256 public lockDuration = 12 days;
mapping(address => mapping(uint256 => uint256)) public lastClaimedTime;
constructor() {
token = IERC20(0x045B5a77Da935B1B79Aa114265dA30B590787587);
}
function setToken(address _token) external onlyOwner {
token = IERC20(_token);
}
/**
* @dev doAirdrop is the main method for distribution
* @param _owner address addresses to airdrop
*/
function doAirdrop(uint256 [] calldata tokenIds, uint256 [] calldata startTimestamps, address _owner) external {
require(_owner == msg.sender, "this is not your NFT owner!");
require(tokenIds.length == startTimestamps.length, "defferent the length of tokenId and timestamp");
uint256 amount = 0;
for(uint256 i = 0; i < tokenIds.length; i++){
uint256 timeDiff = 0;
if(lastClaimedTime[msg.sender][tokenIds[i]] != 0){ // the case of not initial claim
timeDiff = block.timestamp.sub(lastClaimedTime[msg.sender][tokenIds[i]]);
if(timeDiff >= 1 days){
amount += timeDiff.div(1 days) * 7;
lastClaimedTime[msg.sender][tokenIds[i]] = block.timestamp;
}
} else { // the case of initial claim
timeDiff = block.timestamp.sub(startTimestamps[i]);
if(timeDiff > lockDuration){
timeDiff = timeDiff.sub(lockDuration);
amount += timeDiff.div(1 days) * 7;
lastClaimedTime[msg.sender][tokenIds[i]] = block.timestamp;
}
}
}
require(amount > 0, "not enough amount");
require(token.balanceOf(address(this)) >= amount, "not enough balance");
token.transfer(msg.sender, amount);
}
function getAmount(uint256 [] calldata tokenIds, uint256 [] calldata startTimestamps) external view returns(uint256) {
uint256 amount = 0;
for(uint256 i = 0; i < tokenIds.length; i++){
uint256 timeDiff = 0;
if(lastClaimedTime[msg.sender][tokenIds[i]] != 0){ // the case of not initial claim
timeDiff = block.timestamp.sub(lastClaimedTime[msg.sender][tokenIds[i]]);
if(timeDiff >= 1 days)
amount += timeDiff.div(1 days) * 7;
} else { // the case of initial claim
timeDiff = block.timestamp.sub(startTimestamps[i]);
if(timeDiff > lockDuration){
timeDiff = timeDiff.sub(lockDuration);
amount += timeDiff.div(1 days) * 7;
}
}
}
return amount;
}
function getLastClaimedTime(address user, uint256 tokenId) external view returns(uint256) {
return lastClaimedTime[user][tokenId];
}
} | the case of not initial claim
| if(lastClaimedTime[msg.sender][tokenIds[i]] != 0){ | 13,770,778 | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
library BondingCurveMath {
/// @dev Calculate linear function
/// @param x (uint256): Input
/// @return (uint256): Result
function lin(uint256 x) internal pure returns (uint256) {
return 10 * x;
}
/// @dev Calculate exponential function
/// @param x (uint256): Input
/// @return result (uint256): Result
function exp(uint256 x) internal pure returns (uint256 result) {
if (x < 50) {
result = (10**(50 - x) * 1000) / 11**(50 - x);
} else if (x == 50) {
result = 1000;
} else {
result = (11**(x - 50) * 1000) / 10**(x - 50);
}
result += 26 * x;
result -= 8;
}
}
| @dev Calculate linear function @param x (uint256): Input @return (uint256): Result | function lin(uint256 x) internal pure returns (uint256) {
return 10 * x;
}
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pragma solidity ^0.4.24;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b)
internal
pure
returns (uint256 c)
{
if (a == 0) {
return 0;
}
c = a * b;
require(c / a == b, "SafeMath mul failed");
return c;
}
function sub(uint256 a, uint256 b)
internal
pure
returns (uint256)
{
require(b <= a, "SafeMath sub failed");
return a - b;
}
function add(uint256 a, uint256 b)
internal
pure
returns (uint256 c)
{
c = a + b;
require(c >= a, "SafeMath add failed");
return c;
}
function sqrt(uint256 x)
internal
pure
returns (uint256 y)
{
uint256 z = ((add(x,1)) / 2);
y = x;
while (z < y)
{
y = z;
z = ((add((x / z),z)) / 2);
}
}
function sq(uint256 x)
internal
pure
returns (uint256)
{
return (mul(x,x));
}
function pwr(uint256 x, uint256 y)
internal
pure
returns (uint256)
{
if (x==0)
return (0);
else if (y==0)
return (1);
else
{
uint256 z = x;
for (uint256 i=1; i < y; i++)
z = mul(z,x);
return (z);
}
}
}
contract PlagueEvents {
//infective person
event onInfectiveStage
(
address indexed player,
uint256 indexed rndNo,
uint256 keys,
uint256 eth,
uint256 timeStamp,
address indexed inveter
);
// become leader during second stage
event onDevelopmentStage
(
address indexed player,
uint256 indexed rndNo,
uint256 eth,
uint256 timeStamp,
address indexed inveter
);
// award
event onAward
(
address indexed player,
uint256 indexed rndNo,
uint256 eth,
uint256 timeStamp
);
}
contract Plague is PlagueEvents{
using SafeMath for *;
using KeysCalc for uint256;
struct Round {
uint256 eth; // total eth
uint256 keys; // total keys
uint256 startTime; // end time
uint256 endTime; // end time
uint256 infectiveEndTime; // infective end time
address leader; // leader
address infectLastPlayer; // the player will award 10% eth
address [11] lastInfective; // the lastest 11 infective
address [4] loseInfective; // the lose infective
bool [11] infectiveAward_m; //
uint256 totalInfective; // the count of this round
uint256 inveterAmount; // remain inveter amount of this round
uint256 lastRoundReward; // last round remain eth 10% + eth 4% - inveterAmount + last remain award
uint256 exAward; // development award
}
struct PlayerRound {
uint256 eth; // eth player has added to round
uint256 keys; // keys
uint256 withdraw; // how many eth has been withdraw
uint256 getInveterAmount; // inverter amount
uint256 hasGetAwardAmount; // player has get award amount
}
uint256 public rndNo = 1; // current round number
uint256 public totalEth = 0; // total eth in all round
uint256 constant private rndInfectiveStage_ = 10 minutes; // round timer at iinfective stage12 hours;
uint256 constant private rndInfectiveReadyTime_ = 1 minutes; // round timer at infective stage ready time
uint256 constant private rndDevelopmentStage_ = 3 minutes; // round timer at development stage 30 minutes;
uint256 constant private rndDevelopmentReadyTime_ = 1 minutes; // round timer at development stage ready time 1 hours;
uint256 constant private allKeys_ = 100 * (10 ** 18); // all keys count
uint256 constant private allEths_ = 7500773437500000; // all eths count
uint256 constant private rndIncreaseTime_ = 3 minutes; // increase time 3 hours
uint256 constant private developmentAwardPercent = 1; // 0.1% reduction every 3 hours
mapping (uint256 => Round) public round_m; // (rndNo => Round)
mapping (uint256 => mapping (address => PlayerRound)) public playerRound_m; // (rndNo => addr => PlayerRound)
address public owner; // owner address
address public receiver = address(0); // receive eth address
uint256 public ownerWithdraw = 0; // how many eth has been withdraw by owner
bool public isStartGame = false; // start game flag
constructor()
public
{
owner = msg.sender;
}
/**
* @dev prevents contracts from interacting
*/
modifier onlyHuman()
{
address _addr = msg.sender;
uint256 _codeLength;
assembly {_codeLength := extcodesize(_addr)}
require(_codeLength == 0, "sorry humans only");
_;
}
/**
* @dev sets boundaries for incoming tx
*/
modifier isWithinLimits(uint256 _eth)
{
require(_eth >= 1000000000, "pocket lint: not a valid currency");
require(_eth <= 100000000000000000000000, "no vitalik, no");
_;
}
/**
* @dev only owner
*/
modifier onlyOwner()
{
require(owner == msg.sender, "only owner can do it");
_;
}
/**
* @dev It must be human beings to call the function.
*/
function isHuman(address _addr) private view returns (bool)
{
uint256 _codeLength;
assembly {_codeLength := extcodesize(_addr)}
return _codeLength == 0;
}
/**
* @dev player infect a person at current round
*
*/
function buyKeys(address _inveter) private
{
uint256 _eth = msg.value;
uint256 _now = now;
uint256 _rndNo = rndNo;
uint256 _ethUse = msg.value;
// start next round?
if (_now > round_m[_rndNo].endTime)
{
require(round_m[_rndNo].endTime + rndDevelopmentReadyTime_ < _now, "we should wait some times");
uint256 lastAwardEth = (round_m[_rndNo].eth.mul(14) / 100).sub(round_m[_rndNo].inveterAmount);
if(round_m[_rndNo].totalInfective < round_m[_rndNo].lastInfective.length.sub(1))
{
uint256 nextPlayersAward = round_m[_rndNo].lastInfective.length.sub(1).sub(round_m[_rndNo].totalInfective);
uint256 _totalAward = round_m[_rndNo].eth.mul(30) / 100;
_totalAward = _totalAward.add(round_m[_rndNo].lastRoundReward);
if(round_m[_rndNo].infectLastPlayer != address(0))
{
lastAwardEth = lastAwardEth.add(nextPlayersAward.mul(_totalAward.mul(3)/100));
}
else
{
lastAwardEth = lastAwardEth.add(nextPlayersAward.mul(_totalAward.mul(4)/100));
}
}
_rndNo = _rndNo.add(1);
rndNo = _rndNo;
round_m[_rndNo].startTime = _now;
round_m[_rndNo].endTime = _now + rndInfectiveStage_;
round_m[_rndNo].totalInfective = 0;
round_m[_rndNo].lastRoundReward = lastAwardEth;
}
// infective or second stage
if (round_m[_rndNo].keys < allKeys_)
{
// infection stage
uint256 _keys = (round_m[_rndNo].eth).keysRec(_eth);
if (_keys.add(round_m[_rndNo].keys) >= allKeys_)
{
_keys = allKeys_.sub(round_m[_rndNo].keys);
if (round_m[_rndNo].eth >= allEths_)
{
_ethUse = 0;
}
else {
_ethUse = (allEths_).sub(round_m[_rndNo].eth);
}
if (_eth > _ethUse)
{
// refund
msg.sender.transfer(_eth.sub(_ethUse));
}
else {
// fix
_ethUse = _eth;
}
// first stage is over, record current time
round_m[_rndNo].infectiveEndTime = _now.add(rndInfectiveReadyTime_);
round_m[_rndNo].endTime = _now.add(rndDevelopmentStage_).add(rndInfectiveReadyTime_);
round_m[_rndNo].infectLastPlayer = msg.sender;
}
else
{
require (_keys >= 1 * 10 ** 19, "at least 10 thound people");
round_m[_rndNo].endTime = _now + rndInfectiveStage_;
}
round_m[_rndNo].leader = msg.sender;
// update playerRound
playerRound_m[_rndNo][msg.sender].keys = _keys.add(playerRound_m[_rndNo][msg.sender].keys);
playerRound_m[_rndNo][msg.sender].eth = _ethUse.add(playerRound_m[_rndNo][msg.sender].eth);
// update round
round_m[_rndNo].keys = _keys.add(round_m[_rndNo].keys);
round_m[_rndNo].eth = _ethUse.add(round_m[_rndNo].eth);
// update global variable
totalEth = _ethUse.add(totalEth);
// event
emit PlagueEvents.onInfectiveStage
(
msg.sender,
_rndNo,
_keys,
_ethUse,
_now,
_inveter
);
} else {
// second stage
require(round_m[_rndNo].infectiveEndTime < _now, "The virus is being prepared...");
// increase 0.05 Ether every 3 hours
_ethUse = (((_now.sub(round_m[_rndNo].infectiveEndTime)) / rndIncreaseTime_).mul(5 * 10 ** 16)).add((5 * 10 ** 16));
require(_eth >= _ethUse, "Ether amount is wrong");
if(_eth > _ethUse)
{
msg.sender.transfer(_eth.sub(_ethUse));
}
round_m[_rndNo].endTime = _now + rndDevelopmentStage_;
round_m[_rndNo].leader = msg.sender;
// update playerRound
playerRound_m[_rndNo][msg.sender].eth = _ethUse.add(playerRound_m[_rndNo][msg.sender].eth);
// update round
round_m[_rndNo].eth = _ethUse.add(round_m[_rndNo].eth);
// update global variable
totalEth = _ethUse.add(totalEth);
// update development award
uint256 _exAwardPercent = ((_now.sub(round_m[_rndNo].infectiveEndTime)) / rndIncreaseTime_).mul(developmentAwardPercent).add(developmentAwardPercent);
if(_exAwardPercent >= 410)
{
_exAwardPercent = 410;
}
round_m[_rndNo].exAward = (_exAwardPercent.mul(_ethUse) / 1000).add(round_m[_rndNo].exAward);
// event
emit PlagueEvents.onDevelopmentStage
(
msg.sender,
_rndNo,
_ethUse,
_now,
_inveter
);
}
// caculate share inveter amount
if(_inveter != address(0) && isHuman(_inveter))
{
playerRound_m[_rndNo][_inveter].getInveterAmount = playerRound_m[_rndNo][_inveter].getInveterAmount.add(_ethUse.mul(10) / 100);
round_m[_rndNo].inveterAmount = round_m[_rndNo].inveterAmount.add(_ethUse.mul(10) / 100);
}
round_m[_rndNo].loseInfective[round_m[_rndNo].totalInfective % 4] = round_m[_rndNo].lastInfective[round_m[_rndNo].totalInfective % 11];
round_m[_rndNo].lastInfective[round_m[_rndNo].totalInfective % 11] = msg.sender;
round_m[_rndNo].totalInfective = round_m[_rndNo].totalInfective.add(1);
}
/**
* @dev recommend a player
*/
function buyKeyByAddr(address _inveter)
onlyHuman()
isWithinLimits(msg.value)
public
payable
{
require(isStartGame == true, "The game hasn't started yet.");
buyKeys(_inveter);
}
/**
* @dev play
*/
function()
onlyHuman()
isWithinLimits(msg.value)
public
payable
{
require(isStartGame == true, "The game hasn't started yet.");
buyKeys(address(0));
}
/**
* @dev Award by rndNo.
* 0x80ec35ff
* 0x80ec35ff0000000000000000000000000000000000000000000000000000000000000001
*/
function awardByRndNo(uint256 _rndNo)
onlyHuman()
public
{
require(isStartGame == true, "The game hasn't started yet.");
require(_rndNo <= rndNo, "You're running too fast");
uint256 _ethOut = 0;
uint256 _totalAward = round_m[_rndNo].eth.mul(30) / 100;
_totalAward = _totalAward.add(round_m[_rndNo].lastRoundReward);
_totalAward = _totalAward.add(round_m[_rndNo].exAward);
uint256 _getAward = 0;
//withdraw award
uint256 _totalWithdraw = round_m[_rndNo].eth.mul(51) / 100;
_totalWithdraw = _totalWithdraw.sub(round_m[_rndNo].exAward);
_totalWithdraw = (_totalWithdraw.mul(playerRound_m[_rndNo][msg.sender].keys));
_totalWithdraw = _totalWithdraw / round_m[_rndNo].keys;
uint256 _inveterAmount = playerRound_m[_rndNo][msg.sender].getInveterAmount;
_totalWithdraw = _totalWithdraw.add(_inveterAmount);
uint256 _withdrawed = playerRound_m[_rndNo][msg.sender].withdraw;
if(_totalWithdraw > _withdrawed)
{
_ethOut = _ethOut.add(_totalWithdraw.sub(_withdrawed));
playerRound_m[_rndNo][msg.sender].withdraw = _totalWithdraw;
}
//lastest infect player
if(msg.sender == round_m[_rndNo].infectLastPlayer && round_m[_rndNo].infectLastPlayer != address(0) && round_m[_rndNo].infectiveEndTime != 0)
{
_getAward = _getAward.add(_totalAward.mul(10)/100);
}
if(now > round_m[_rndNo].endTime)
{
// finally award
if(round_m[_rndNo].leader == msg.sender)
{
_getAward = _getAward.add(_totalAward.mul(60)/100);
}
//finally ten person award
for(uint256 i = 0;i < round_m[_rndNo].lastInfective.length; i = i.add(1))
{
if(round_m[_rndNo].lastInfective[i] == msg.sender && (round_m[_rndNo].totalInfective.sub(1) % 11) != i){
if(round_m[_rndNo].infectiveAward_m[i])
continue;
if(round_m[_rndNo].infectLastPlayer != address(0))
{
_getAward = _getAward.add(_totalAward.mul(3)/100);
}
else{
_getAward = _getAward.add(_totalAward.mul(4)/100);
}
round_m[_rndNo].infectiveAward_m[i] = true;
}
}
}
_ethOut = _ethOut.add(_getAward.sub(playerRound_m[_rndNo][msg.sender].hasGetAwardAmount));
playerRound_m[_rndNo][msg.sender].hasGetAwardAmount = _getAward;
if(_ethOut != 0)
{
msg.sender.transfer(_ethOut);
}
// event
emit PlagueEvents.onAward
(
msg.sender,
_rndNo,
_ethOut,
now
);
}
/**
* @dev Get player bonus data
* 0xd982466d
* 0xd982466d0000000000000000000000000000000000000000000000000000000000000001000000000000000000000000028f211f6c07d3b79e0aab886d56333e4027d4f59
* @return player's award
* @return player's can withdraw amount
* @return player's inveter amount
* @return player's has been withdraw
*/
function getPlayerAwardByRndNo(uint256 _rndNo, address _playAddr)
view
public
returns (uint256, uint256, uint256, uint256)
{
uint256 _ethPlayerAward = 0;
//withdraw award
uint256 _totalWithdraw = round_m[_rndNo].eth.mul(51) / 100;
_totalWithdraw = _totalWithdraw.sub(round_m[_rndNo].exAward);
_totalWithdraw = (_totalWithdraw.mul(playerRound_m[_rndNo][_playAddr].keys));
_totalWithdraw = _totalWithdraw / round_m[_rndNo].keys;
uint256 _totalAward = round_m[_rndNo].eth.mul(30) / 100;
_totalAward = _totalAward.add(round_m[_rndNo].lastRoundReward);
_totalAward = _totalAward.add(round_m[_rndNo].exAward);
//lastest infect player
if(_playAddr == round_m[_rndNo].infectLastPlayer && round_m[_rndNo].infectLastPlayer != address(0) && round_m[_rndNo].infectiveEndTime != 0)
{
_ethPlayerAward = _ethPlayerAward.add(_totalAward.mul(10)/100);
}
if(now > round_m[_rndNo].endTime)
{
// finally award
if(round_m[_rndNo].leader == _playAddr)
{
_ethPlayerAward = _ethPlayerAward.add(_totalAward.mul(60)/100);
}
//finally ten person award
for(uint256 i = 0;i < round_m[_rndNo].lastInfective.length; i = i.add(1))
{
if(round_m[_rndNo].lastInfective[i] == _playAddr && (round_m[_rndNo].totalInfective.sub(1) % 11) != i)
{
if(round_m[_rndNo].infectLastPlayer != address(0))
{
_ethPlayerAward = _ethPlayerAward.add(_totalAward.mul(3)/100);
}
else{
_ethPlayerAward = _ethPlayerAward.add(_totalAward.mul(4)/100);
}
}
}
}
return
(
_ethPlayerAward,
_totalWithdraw,
playerRound_m[_rndNo][_playAddr].getInveterAmount,
playerRound_m[_rndNo][_playAddr].hasGetAwardAmount + playerRound_m[_rndNo][_playAddr].withdraw
);
}
/**
* @dev fee withdraw to receiver, everyone can do it.
* 0x6561e6ba
*/
function feeWithdraw()
onlyHuman()
public
{
require(isStartGame == true, "The game hasn't started yet.");
require(receiver != address(0), "The receiver address has not been initialized.");
uint256 _total = (totalEth.mul(5) / (100));
uint256 _withdrawed = ownerWithdraw;
require(_total > _withdrawed, "No need to withdraw");
ownerWithdraw = _total;
receiver.transfer(_total.sub(_withdrawed));
}
/**
* @dev start game
* 0xd65ab5f2
*/
function startGame()
onlyOwner()
public
{
round_m[1].startTime = now;
round_m[1].endTime = now + rndInfectiveStage_;
round_m[1].lastRoundReward = 0;
isStartGame = true;
}
/**
* @dev change owner.
* 0x547e3f06000000000000000000000000695c7a3c1a27de4bb32cd812a8c2677e25f0b9d5
*/
function changeReceiver(address newReceiver)
onlyOwner()
public
{
receiver = newReceiver;
}
/**
* @dev returns all current round info needed for front end
* 0x747dff42
*/
function getCurrentRoundInfo()
public
view
returns(uint256, uint256[2], uint256[3], address[2], uint256[6], address[11],address[4])
{
uint256 _rndNo = rndNo;
uint256 _totalAwardAtRound = round_m[_rndNo].lastRoundReward.add(round_m[_rndNo].exAward).add(round_m[_rndNo].eth.mul(30) / 100);
return (
_rndNo,
[round_m[_rndNo].eth, round_m[_rndNo].keys],
[round_m[_rndNo].startTime, round_m[_rndNo].endTime, round_m[_rndNo].infectiveEndTime],
[round_m[_rndNo].leader, round_m[_rndNo].infectLastPlayer],
[getBuyPrice(), round_m[_rndNo].lastRoundReward, _totalAwardAtRound, round_m[_rndNo].inveterAmount, round_m[_rndNo].totalInfective % 11, round_m[_rndNo].exAward],
round_m[_rndNo].lastInfective,
round_m[_rndNo].loseInfective
);
}
/**
* @dev return the price buyer will pay for next 1 individual key during first stage.
* 0x018a25e8
* @return price for next key bought (in wei format)
*/
function getBuyPrice()
public
view
returns(uint256)
{
uint256 _rndNo = rndNo;
uint256 _now = now;
// start next round?
if (_now > round_m[_rndNo].endTime)
{
return (750007031250000);
}
if (round_m[_rndNo].keys < allKeys_)
{
return ((round_m[_rndNo].keys.add(10000000000000000000)).ethRec(10000000000000000000));
}
if(round_m[_rndNo].keys >= allKeys_ &&
round_m[_rndNo].infectiveEndTime != 0 &&
round_m[_rndNo].infectLastPlayer != address(0) &&
_now < round_m[_rndNo].infectiveEndTime)
{
return 5 * 10 ** 16;
}
if(round_m[_rndNo].keys >= allKeys_ && _now > round_m[_rndNo].infectiveEndTime)
{
// increase 0.05 Ether every 3 hours
uint256 currentPrice = (((_now.sub(round_m[_rndNo].infectiveEndTime)) / rndIncreaseTime_).mul(5 * 10 ** 16)).add((5 * 10 ** 16));
return currentPrice;
}
//second stage
return (0);
}
}
library KeysCalc {
using SafeMath for *;
/**
* @dev calculates number of keys received given X eth
* @param _curEth current amount of eth in contract
* @param _newEth eth being spent
* @return amount of ticket purchased
*/
function keysRec(uint256 _curEth, uint256 _newEth)
internal
pure
returns (uint256)
{
return(keys((_curEth).add(_newEth)).sub(keys(_curEth)));
}
/**
* @dev calculates amount of eth received if you sold X keys
* @param _curKeys current amount of keys that exist
* @param _sellKeys amount of keys you wish to sell
* @return amount of eth received
*/
function ethRec(uint256 _curKeys, uint256 _sellKeys)
internal
pure
returns (uint256)
{
return((eth(_curKeys)).sub(eth(_curKeys.sub(_sellKeys))));
}
/**
* @dev calculates how many keys would exist with given an amount of eth
* @param _eth eth "in contract"
* @return number of keys that would exist
*/
function keys(uint256 _eth)
internal
pure
returns(uint256)
{
return ((((((_eth).mul(1000000000000000000)).mul(312500000000000000000000000)).add(5624988281256103515625000000000000000000000000000000000000000000)).sqrt()).sub(74999921875000000000000000000000)) / (156250000);
}
/**
* @dev calculates how much eth would be in contract given a number of keys
* @param _keys number of keys "in contract"
* @return eth that would exists
*/
function eth(uint256 _keys)
internal
pure
returns(uint256)
{
return ((78125000).mul(_keys.sq()).add(((149999843750000).mul(_keys.mul(1000000000000000000))) / (2))) / ((1000000000000000000).sq());
}
} | round timer at infective stage ready time
| uint256 constant private rndInfectiveReadyTime_ = 1 minutes; | 13,039,440 | [
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./full_match/44787/0xB1948a9623856f933Ba654CFa5933A0ac73136E2/sources/contracts/microcredit/MicrocreditImplementation.sol | * @notice Repay a loan @param _loanId Loan ID @param _tokenRepaymentAmount Repayment amount/all repaymentAmount should go to microcredit addressall repaymentAmount should go to revenue addressa part of the repayment should go to microcredit address and the rest should go to the revenue address | function repayLoan(uint256 _loanId, uint256 _tokenRepaymentAmount) external override nonReentrant {
require(_tokenRepaymentAmount > 0, "Microcredit: Invalid amount");
_checkUserLoan(msg.sender, _loanId);
WalletMetadata memory _metadata = _walletMetadata[msg.sender];
User storage _user = _users[_metadata.userId];
Loan storage _loan = _user.loans[_loanId];
require(_loan.startDate > 0, "Microcredit: Loan not claimed");
require(_loan.lastComputedDebt > 0, "Microcredit: Loan has already been fully repayed");
uint256 _currentDebt = _calculateCurrentDebt(_loan);
uint256 _repaymentAmount = _getCUSDAmountFromExactTokenInput(_loan.tokenAddress, _tokenRepaymentAmount);
if (_currentDebt < _repaymentAmount) {
_repaymentAmount = _currentDebt;
_tokenRepaymentAmount = _getTokenAmountFromExactCUSDOutput(_loan.tokenAddress, _repaymentAmount);
}
if (_loan.amountRepayed + _repaymentAmount <= _loan.amountBorrowed) {
IERC20(_loan.tokenAddress).safeTransferFrom(
msg.sender,
address(this),
_tokenRepaymentAmount
);
_registerRepaymentToManager(_loan.managerAddress, _repaymentAmount);
IERC20(_loan.tokenAddress).safeTransferFrom(
msg.sender,
revenueAddress,
_tokenRepaymentAmount
);
uint256 _loanDiff = _loan.amountBorrowed - _loan.amountRepayed;
uint256 _tokenLoanDiff = _getTokenAmountFromExactCUSDOutput(_loan.tokenAddress, _loanDiff);
IERC20(_loan.tokenAddress).safeTransferFrom(msg.sender, address(this), _tokenLoanDiff);
IERC20(_loan.tokenAddress).safeTransferFrom(
msg.sender,
revenueAddress,
_tokenRepaymentAmount - _tokenLoanDiff
);
_registerRepaymentToManager(_loan.managerAddress, _loanDiff);
}
Repayment storage _repayment = _loan.repayments[_loan.repaymentsLength];
_loan.repaymentsLength++;
_repayment.date = block.timestamp;
_repayment.amount = _repaymentAmount;
_repayment.tokenAmount = _tokenRepaymentAmount;
_loan.lastComputedDebt = _currentDebt - _repaymentAmount;
_loan.amountRepayed += _repaymentAmount;
_loan.tokenAmountRepayed += _tokenRepaymentAmount;
_loan.lastComputedDate = _loan.lastComputedDate + _days * 86400;
if (_loan.lastComputedDebt == 0 && address(donationMiner) != address(0)) {
donationMiner.donateVirtual(_loan.amountRepayed - _loan.amountBorrowed, msg.sender);
}
emit RepaymentAdded(msg.sender, _loanId, _repaymentAmount, _loan.lastComputedDebt);
}
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/*
Copyright 2021 Index Coop
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
SPDX-License-Identifier: Apache License, Version 2.0
*/
pragma solidity 0.6.10;
import { BaseExtension } from "../lib/BaseExtension.sol";
import { IBaseManager } from "../interfaces/IBaseManager.sol";
import { ISetToken } from "../interfaces/ISetToken.sol";
import { IWrapModule } from "../interfaces/IWrapModule.sol";
/**
* @title WrapExtension
* @author Index Coop
*
* Manager extension for interacting with WrapModule
*/
contract WrapExtension is BaseExtension {
/* ========== State Variables ========= */
// Address of Set Token
ISetToken public immutable setToken;
// Address of WrapModule
IWrapModule public immutable wrapModule;
/* ============ Constructor ============ */
/**
* Sets state variables
*
* @param _manager Manager contract
* @param _wrapModule Set Protocol WrapModule
*/
constructor(IBaseManager _manager, IWrapModule _wrapModule) public BaseExtension(_manager) {
manager = _manager;
setToken = manager.setToken();
wrapModule = _wrapModule;
}
/* ========== External Functions ========== */
/**
* OPERATOR ONLY: Initializes the Set Token on the Wrap Module.
*/
function initialize() external onlyOperator {
bytes memory data = abi.encodeWithSelector(wrapModule.initialize.selector, setToken);
invokeManager(address(wrapModule), data);
}
/**
* OPERATOR ONLY: Calls wrap on the WrapModule.
*
* @param _underlyingToken address of underlying token
* @param _wrappedToken address of wrapped token
* @param _underlyingUnits units of underlying to wrap
* @param _integrationName Set Protocol integreation name for the wrap adapter
*/
function wrap(
address _underlyingToken,
address _wrappedToken,
uint256 _underlyingUnits,
string calldata _integrationName
)
external
onlyOperator
{
bytes memory data = abi.encodeWithSelector(
wrapModule.wrap.selector,
setToken,
_underlyingToken,
_wrappedToken,
_underlyingUnits,
_integrationName
);
invokeManager(address(wrapModule), data);
}
/**
* OPERATOR ONLY: Calls wrapWithEther on the WrapModule.
*
* @param _wrappedToken address of wrapped token
* @param _underlyingUnits units of weth to wrap
* @param _integrationName Set Protocol integreation name for the wrap adapter
*/
function wrapWithEther(
address _wrappedToken,
uint256 _underlyingUnits,
string calldata _integrationName
)
external
onlyOperator
{
bytes memory data = abi.encodeWithSelector(
wrapModule.wrapWithEther.selector,
setToken,
_wrappedToken,
_underlyingUnits,
_integrationName
);
invokeManager(address(wrapModule), data);
}
/**
* OPERATOR ONLY: Calls unwrap on the WrapModule.
*
* @param _underlyingToken address of underlying token
* @param _wrappedToken address of wrapped token
* @param _wrappedUnits units of wrapped token to unwrap
* @param _integrationName Set Protocol integreation name for the wrap adapter
*/
function unwrap(
address _underlyingToken,
address _wrappedToken,
uint256 _wrappedUnits,
string calldata _integrationName
)
external
onlyOperator
{
bytes memory data = abi.encodeWithSelector(
wrapModule.unwrap.selector,
setToken,
_underlyingToken,
_wrappedToken,
_wrappedUnits,
_integrationName
);
invokeManager(address(wrapModule), data);
}
/**
* OPERATOR ONLY: Calls unwrapWithEther on the WrapModule.
*
* @param _wrappedToken address of wrapped token
* @param _wrappedUnits units of wrapped token to unwrap
* @param _integrationName Set Protocol integreation name for the wrap adapter
*/
function unwrapWithEther(
address _wrappedToken,
uint256 _wrappedUnits,
string calldata _integrationName
)
external
onlyOperator
{
bytes memory data = abi.encodeWithSelector(
wrapModule.unwrapWithEther.selector,
setToken,
_wrappedToken,
_wrappedUnits,
_integrationName
);
invokeManager(address(wrapModule), data);
}
} | * OPERATOR ONLY: Calls wrapWithEther on the WrapModule. @param _wrappedToken address of wrapped token @param _underlyingUnits units of weth to wrap @param _integrationName Set Protocol integreation name for the wrap adapter/ | function wrapWithEther(
address _wrappedToken,
uint256 _underlyingUnits,
string calldata _integrationName
)
external
onlyOperator
{
bytes memory data = abi.encodeWithSelector(
wrapModule.wrapWithEther.selector,
setToken,
_wrappedToken,
_underlyingUnits,
_integrationName
);
invokeManager(address(wrapModule), data);
}
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pragma solidity ^0.4.18;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title Claimable
* @dev Extension for the Ownable contract, where the ownership needs to be claimed.
* This allows the new owner to accept the transfer.
*/
contract Claimable is Ownable {
address public pendingOwner;
/**
* @dev Modifier throws if called by any account other than the pendingOwner.
*/
modifier onlyPendingOwner() {
require(msg.sender == pendingOwner);
_;
}
/**
* @dev Allows the current owner to set the pendingOwner address.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner public {
pendingOwner = newOwner;
}
/**
* @dev Allows the pendingOwner address to finalize the transfer.
*/
function claimOwnership() onlyPendingOwner public {
OwnershipTransferred(owner, pendingOwner);
owner = pendingOwner;
pendingOwner = address(0);
}
}
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
Unpause();
}
}
/**
* @title ERC721 interface
* @dev see https://github.com/ethereum/eips/issues/721
*/
contract ERC721 {
event Transfer(address indexed _from, address indexed _to, uint256 _tokenId);
event Approval(address indexed _owner, address indexed _approved, uint256 _tokenId);
function balanceOf(address _owner) public view returns (uint256 _balance);
function ownerOf(uint256 _tokenId) public view returns (address _owner);
function transfer(address _to, uint256 _tokenId) public;
function approve(address _to, uint256 _tokenId) public;
function takeOwnership(uint256 _tokenId) public;
}
/**
* @title ERC721Token
* Generic implementation for the required functionality of the ERC721 standard
*/
contract ERC721Token is ERC721 {
using SafeMath for uint256;
// Total amount of tokens
uint256 private totalTokens;
// Mapping from token ID to owner
mapping (uint256 => address) private tokenOwner;
// Mapping from token ID to approved address
mapping (uint256 => address) private tokenApprovals;
// Mapping from owner to list of owned token IDs
mapping (address => uint256[]) private ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private ownedTokensIndex;
/**
* @dev Guarantees msg.sender is owner of the given token
* @param _tokenId uint256 ID of the token to validate its ownership belongs to msg.sender
*/
modifier onlyOwnerOf(uint256 _tokenId) {
require(ownerOf(_tokenId) == msg.sender);
_;
}
/**
* @dev Gets the total amount of tokens stored by the contract
* @return uint256 representing the total amount of tokens
*/
function totalSupply() public view returns (uint256) {
return totalTokens;
}
/**
* @dev Gets the balance of the specified address
* @param _owner address to query the balance of
* @return uint256 representing the amount owned by the passed address
*/
function balanceOf(address _owner) public view returns (uint256) {
return ownedTokens[_owner].length;
}
/**
* @dev Gets the list of tokens owned by a given address
* @param _owner address to query the tokens of
* @return uint256[] representing the list of tokens owned by the passed address
*/
function tokensOf(address _owner) public view returns (uint256[]) {
return ownedTokens[_owner];
}
/**
* @dev Gets the owner of the specified token ID
* @param _tokenId uint256 ID of the token to query the owner of
* @return owner address currently marked as the owner of the given token ID
*/
function ownerOf(uint256 _tokenId) public view returns (address) {
address owner = tokenOwner[_tokenId];
require(owner != address(0));
return owner;
}
/**
* @dev Gets the approved address to take ownership of a given token ID
* @param _tokenId uint256 ID of the token to query the approval of
* @return address currently approved to take ownership of the given token ID
*/
function approvedFor(uint256 _tokenId) public view returns (address) {
return tokenApprovals[_tokenId];
}
/**
* @dev Transfers the ownership of a given token ID to another address
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function transfer(address _to, uint256 _tokenId) public onlyOwnerOf(_tokenId) {
clearApprovalAndTransfer(msg.sender, _to, _tokenId);
}
/**
* @dev Approves another address to claim for the ownership of the given token ID
* @param _to address to be approved for the given token ID
* @param _tokenId uint256 ID of the token to be approved
*/
function approve(address _to, uint256 _tokenId) public onlyOwnerOf(_tokenId) {
address owner = ownerOf(_tokenId);
require(_to != owner);
if (approvedFor(_tokenId) != 0 || _to != 0) {
tokenApprovals[_tokenId] = _to;
Approval(owner, _to, _tokenId);
}
}
/**
* @dev Claims the ownership of a given token ID
* @param _tokenId uint256 ID of the token being claimed by the msg.sender
*/
function takeOwnership(uint256 _tokenId) public {
require(isApprovedFor(msg.sender, _tokenId));
clearApprovalAndTransfer(ownerOf(_tokenId), msg.sender, _tokenId);
}
/**
* @dev Mint token function
* @param _to The address that will own the minted token
* @param _tokenId uint256 ID of the token to be minted by the msg.sender
*/
function _mint(address _to, uint256 _tokenId) internal {
require(_to != address(0));
addToken(_to, _tokenId);
Transfer(0x0, _to, _tokenId);
}
/**
* @dev Burns a specific token
* @param _tokenId uint256 ID of the token being burned by the msg.sender
*/
function _burn(uint256 _tokenId) onlyOwnerOf(_tokenId) internal {
if (approvedFor(_tokenId) != 0) {
clearApproval(msg.sender, _tokenId);
}
removeToken(msg.sender, _tokenId);
Transfer(msg.sender, 0x0, _tokenId);
}
/**
* @dev Tells whether the msg.sender is approved for the given token ID or not
* This function is not private so it can be extended in further implementations like the operatable ERC721
* @param _owner address of the owner to query the approval of
* @param _tokenId uint256 ID of the token to query the approval of
* @return bool whether the msg.sender is approved for the given token ID or not
*/
function isApprovedFor(address _owner, uint256 _tokenId) internal view returns (bool) {
return approvedFor(_tokenId) == _owner;
}
/**
* @dev Internal function to clear current approval and transfer the ownership of a given token ID
* @param _from address which you want to send tokens from
* @param _to address which you want to transfer the token to
* @param _tokenId uint256 ID of the token to be transferred
*/
function clearApprovalAndTransfer(address _from, address _to, uint256 _tokenId) internal {
require(_to != address(0));
require(_to != ownerOf(_tokenId));
require(ownerOf(_tokenId) == _from);
clearApproval(_from, _tokenId);
removeToken(_from, _tokenId);
addToken(_to, _tokenId);
Transfer(_from, _to, _tokenId);
}
/**
* @dev Internal function to clear current approval of a given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function clearApproval(address _owner, uint256 _tokenId) private {
require(ownerOf(_tokenId) == _owner);
tokenApprovals[_tokenId] = 0;
Approval(_owner, 0, _tokenId);
}
/**
* @dev Internal function to add a token ID to the list of a given address
* @param _to address representing the new owner of the given token ID
* @param _tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function addToken(address _to, uint256 _tokenId) private {
require(tokenOwner[_tokenId] == address(0));
tokenOwner[_tokenId] = _to;
uint256 length = balanceOf(_to);
ownedTokens[_to].push(_tokenId);
ownedTokensIndex[_tokenId] = length;
totalTokens = totalTokens.add(1);
}
/**
* @dev Internal function to remove a token ID from the list of a given address
* @param _from address representing the previous owner of the given token ID
* @param _tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function removeToken(address _from, uint256 _tokenId) private {
require(ownerOf(_tokenId) == _from);
uint256 tokenIndex = ownedTokensIndex[_tokenId];
uint256 lastTokenIndex = balanceOf(_from).sub(1);
uint256 lastToken = ownedTokens[_from][lastTokenIndex];
tokenOwner[_tokenId] = 0;
ownedTokens[_from][tokenIndex] = lastToken;
ownedTokens[_from][lastTokenIndex] = 0;
// Note that this will handle single-element arrays. In that case, both tokenIndex and lastTokenIndex are going to
// be zero. Then we can make sure that we will remove _tokenId from the ownedTokens list since we are first swapping
// the lastToken to the first position, and then dropping the element placed in the last position of the list
ownedTokens[_from].length--;
ownedTokensIndex[_tokenId] = 0;
ownedTokensIndex[lastToken] = tokenIndex;
totalTokens = totalTokens.sub(1);
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @title AccessDeposit
* @dev Adds grant/revoke functions to the contract.
*/
contract AccessDeposit is Claimable {
// Access for adding deposit.
mapping(address => bool) private depositAccess;
// Modifier for accessibility to add deposit.
modifier onlyAccessDeposit {
require(msg.sender == owner || depositAccess[msg.sender] == true);
_;
}
// @dev Grant acess to deposit heroes.
function grantAccessDeposit(address _address)
onlyOwner
public
{
depositAccess[_address] = true;
}
// @dev Revoke acess to deposit heroes.
function revokeAccessDeposit(address _address)
onlyOwner
public
{
depositAccess[_address] = false;
}
}
/**
* @title AccessDeploy
* @dev Adds grant/revoke functions to the contract.
*/
contract AccessDeploy is Claimable {
// Access for deploying heroes.
mapping(address => bool) private deployAccess;
// Modifier for accessibility to deploy a hero on a location.
modifier onlyAccessDeploy {
require(msg.sender == owner || deployAccess[msg.sender] == true);
_;
}
// @dev Grant acess to deploy heroes.
function grantAccessDeploy(address _address)
onlyOwner
public
{
deployAccess[_address] = true;
}
// @dev Revoke acess to deploy heroes.
function revokeAccessDeploy(address _address)
onlyOwner
public
{
deployAccess[_address] = false;
}
}
/**
* @title AccessMint
* @dev Adds grant/revoke functions to the contract.
*/
contract AccessMint is Claimable {
// Access for minting new tokens.
mapping(address => bool) private mintAccess;
// Modifier for accessibility to define new hero types.
modifier onlyAccessMint {
require(msg.sender == owner || mintAccess[msg.sender] == true);
_;
}
// @dev Grant acess to mint heroes.
function grantAccessMint(address _address)
onlyOwner
public
{
mintAccess[_address] = true;
}
// @dev Revoke acess to mint heroes.
function revokeAccessMint(address _address)
onlyOwner
public
{
mintAccess[_address] = false;
}
}
/**
* @title Gold
* @dev ERC20 Token that can be minted.
*/
contract Gold is StandardToken, Claimable, AccessMint {
string public constant name = "Gold";
string public constant symbol = "G";
uint8 public constant decimals = 18;
// Event that is fired when minted.
event Mint(
address indexed _to,
uint256 indexed _tokenId
);
// @dev Mint tokens with _amount to the address.
function mint(address _to, uint256 _amount)
onlyAccessMint
public
returns (bool)
{
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
Mint(_to, _amount);
Transfer(address(0), _to, _amount);
return true;
}
}
/**
* @title CryptoSaga Card
* @dev ERC721 Token that repesents CryptoSaga's cards.
* Buy consuming a card, players of CryptoSaga can get a heroe.
*/
contract CryptoSagaCard is ERC721Token, Claimable, AccessMint {
string public constant name = "CryptoSaga Card";
string public constant symbol = "CARD";
// Rank of the token.
mapping(uint256 => uint8) public tokenIdToRank;
// The number of tokens ever minted.
uint256 public numberOfTokenId;
// The converter contract.
CryptoSagaCardSwap private swapContract;
// Event that should be fired when card is converted.
event CardSwap(address indexed _by, uint256 _tokenId, uint256 _rewardId);
// @dev Set the address of the contract that represents CryptoSaga Cards.
function setCryptoSagaCardSwapContract(address _contractAddress)
public
onlyOwner
{
swapContract = CryptoSagaCardSwap(_contractAddress);
}
function rankOf(uint256 _tokenId)
public view
returns (uint8)
{
return tokenIdToRank[_tokenId];
}
// @dev Mint a new card.
function mint(address _beneficiary, uint256 _amount, uint8 _rank)
onlyAccessMint
public
{
for (uint256 i = 0; i < _amount; i++) {
_mint(_beneficiary, numberOfTokenId);
tokenIdToRank[numberOfTokenId] = _rank;
numberOfTokenId ++;
}
}
// @dev Swap this card for reward.
// The card will be burnt.
function swap(uint256 _tokenId)
onlyOwnerOf(_tokenId)
public
returns (uint256)
{
require(address(swapContract) != address(0));
var _rank = tokenIdToRank[_tokenId];
var _rewardId = swapContract.swapCardForReward(this, _rank);
CardSwap(ownerOf(_tokenId), _tokenId, _rewardId);
_burn(_tokenId);
return _rewardId;
}
}
/**
* @title The interface contract for Card-For-Hero swap functionality.
* @dev With this contract, a card holder can swap his/her CryptoSagaCard for reward.
* This contract is intended to be inherited by CryptoSagaCardSwap implementation contracts.
*/
contract CryptoSagaCardSwap is Ownable {
// Card contract.
address internal cardAddess;
// Modifier for accessibility to define new hero types.
modifier onlyCard {
require(msg.sender == cardAddess);
_;
}
// @dev Set the address of the contract that represents ERC721 Card.
function setCardContract(address _contractAddress)
public
onlyOwner
{
cardAddess = _contractAddress;
}
// @dev Convert card into reward.
// This should be implemented by CryptoSagaCore later.
function swapCardForReward(address _by, uint8 _rank)
onlyCard
public
returns (uint256);
}
/**
* @title CryptoSagaHero
* @dev The token contract for the hero.
* Also a superset of the ERC721 standard that allows for the minting
* of the non-fungible tokens.
*/
contract CryptoSagaHero is ERC721Token, Claimable, Pausable, AccessMint, AccessDeploy, AccessDeposit {
string public constant name = "CryptoSaga Hero";
string public constant symbol = "HERO";
struct HeroClass {
// ex) Soldier, Knight, Fighter...
string className;
// 0: Common, 1: Uncommon, 2: Rare, 3: Heroic, 4: Legendary.
uint8 classRank;
// 0: Human, 1: Celestial, 2: Demon, 3: Elf, 4: Dark Elf, 5: Yogoe, 6: Furry, 7: Dragonborn, 8: Undead, 9: Goblin, 10: Troll, 11: Slime, and more to come.
uint8 classRace;
// How old is this hero class?
uint32 classAge;
// 0: Fighter, 1: Rogue, 2: Mage.
uint8 classType;
// Possible max level of this class.
uint32 maxLevel;
// 0: Water, 1: Fire, 2: Nature, 3: Light, 4: Darkness.
uint8 aura;
// Base stats of this hero type.
// 0: ATK 1: DEF 2: AGL 3: LUK 4: HP.
uint32[5] baseStats;
// Minimum IVs for stats.
// 0: ATK 1: DEF 2: AGL 3: LUK 4: HP.
uint32[5] minIVForStats;
// Maximum IVs for stats.
// 0: ATK 1: DEF 2: AGL 3: LUK 4: HP.
uint32[5] maxIVForStats;
// Number of currently instanced heroes.
uint32 currentNumberOfInstancedHeroes;
}
struct HeroInstance {
// What is this hero's type? ex) John, Sally, Mark...
uint32 heroClassId;
// Individual hero's name.
string heroName;
// Current level of this hero.
uint32 currentLevel;
// Current exp of this hero.
uint32 currentExp;
// Where has this hero been deployed? (0: Never depolyed ever.) ex) Dungeon Floor #1, Arena #5...
uint32 lastLocationId;
// When a hero is deployed, it takes time for the hero to return to the base. This is in Unix epoch.
uint256 availableAt;
// Current stats of this hero.
// 0: ATK 1: DEF 2: AGL 3: LUK 4: HP.
uint32[5] currentStats;
// The individual value for this hero's stats.
// This will affect the current stats of heroes.
// 0: ATK 1: DEF 2: AGL 3: LUK 4: HP.
uint32[5] ivForStats;
}
// Required exp for level up will increase when heroes level up.
// This defines how the value will increase.
uint32 public requiredExpIncreaseFactor = 100;
// Required Gold for level up will increase when heroes level up.
// This defines how the value will increase.
uint256 public requiredGoldIncreaseFactor = 1000000000000000000;
// Existing hero classes.
mapping(uint32 => HeroClass) public heroClasses;
// The number of hero classes ever defined.
uint32 public numberOfHeroClasses;
// Existing hero instances.
// The key is _tokenId.
mapping(uint256 => HeroInstance) public tokenIdToHeroInstance;
// The number of tokens ever minted. This works as the serial number.
uint256 public numberOfTokenIds;
// Gold contract.
Gold public goldContract;
// Deposit of players (in Gold).
mapping(address => uint256) public addressToGoldDeposit;
// Random seed.
uint32 private seed = 0;
// Event that is fired when a hero type defined.
event DefineType(
address indexed _by,
uint32 indexed _typeId,
string _className
);
// Event that is fired when a hero is upgraded.
event LevelUp(
address indexed _by,
uint256 indexed _tokenId,
uint32 _newLevel
);
// Event that is fired when a hero is deployed.
event Deploy(
address indexed _by,
uint256 indexed _tokenId,
uint32 _locationId,
uint256 _duration
);
// @dev Get the class's entire infomation.
function getClassInfo(uint32 _classId)
external view
returns (string className, uint8 classRank, uint8 classRace, uint32 classAge, uint8 classType, uint32 maxLevel, uint8 aura, uint32[5] baseStats, uint32[5] minIVs, uint32[5] maxIVs)
{
var _cl = heroClasses[_classId];
return (_cl.className, _cl.classRank, _cl.classRace, _cl.classAge, _cl.classType, _cl.maxLevel, _cl.aura, _cl.baseStats, _cl.minIVForStats, _cl.maxIVForStats);
}
// @dev Get the class's name.
function getClassName(uint32 _classId)
external view
returns (string)
{
return heroClasses[_classId].className;
}
// @dev Get the class's rank.
function getClassRank(uint32 _classId)
external view
returns (uint8)
{
return heroClasses[_classId].classRank;
}
// @dev Get the heroes ever minted for the class.
function getClassMintCount(uint32 _classId)
external view
returns (uint32)
{
return heroClasses[_classId].currentNumberOfInstancedHeroes;
}
// @dev Get the hero's entire infomation.
function getHeroInfo(uint256 _tokenId)
external view
returns (uint32 classId, string heroName, uint32 currentLevel, uint32 currentExp, uint32 lastLocationId, uint256 availableAt, uint32[5] currentStats, uint32[5] ivs, uint32 bp)
{
HeroInstance memory _h = tokenIdToHeroInstance[_tokenId];
var _bp = _h.currentStats[0] + _h.currentStats[1] + _h.currentStats[2] + _h.currentStats[3] + _h.currentStats[4];
return (_h.heroClassId, _h.heroName, _h.currentLevel, _h.currentExp, _h.lastLocationId, _h.availableAt, _h.currentStats, _h.ivForStats, _bp);
}
// @dev Get the hero's class id.
function getHeroClassId(uint256 _tokenId)
external view
returns (uint32)
{
return tokenIdToHeroInstance[_tokenId].heroClassId;
}
// @dev Get the hero's name.
function getHeroName(uint256 _tokenId)
external view
returns (string)
{
return tokenIdToHeroInstance[_tokenId].heroName;
}
// @dev Get the hero's level.
function getHeroLevel(uint256 _tokenId)
external view
returns (uint32)
{
return tokenIdToHeroInstance[_tokenId].currentLevel;
}
// @dev Get the hero's location.
function getHeroLocation(uint256 _tokenId)
external view
returns (uint32)
{
return tokenIdToHeroInstance[_tokenId].lastLocationId;
}
// @dev Get the time when the hero become available.
function getHeroAvailableAt(uint256 _tokenId)
external view
returns (uint256)
{
return tokenIdToHeroInstance[_tokenId].availableAt;
}
// @dev Get the hero's BP.
function getHeroBP(uint256 _tokenId)
public view
returns (uint32)
{
var _tmp = tokenIdToHeroInstance[_tokenId].currentStats;
return (_tmp[0] + _tmp[1] + _tmp[2] + _tmp[3] + _tmp[4]);
}
// @dev Get the hero's required gold for level up.
function getHeroRequiredGoldForLevelUp(uint256 _tokenId)
public view
returns (uint256)
{
return (uint256(2) ** (tokenIdToHeroInstance[_tokenId].currentLevel / 10)) * requiredGoldIncreaseFactor;
}
// @dev Get the hero's required exp for level up.
function getHeroRequiredExpForLevelUp(uint256 _tokenId)
public view
returns (uint32)
{
return ((tokenIdToHeroInstance[_tokenId].currentLevel + 2) * requiredExpIncreaseFactor);
}
// @dev Get the deposit of gold of the player.
function getGoldDepositOfAddress(address _address)
external view
returns (uint256)
{
return addressToGoldDeposit[_address];
}
// @dev Get the token id of the player's #th token.
function getTokenIdOfAddressAndIndex(address _address, uint256 _index)
external view
returns (uint256)
{
return tokensOf(_address)[_index];
}
// @dev Get the total BP of the player.
function getTotalBPOfAddress(address _address)
external view
returns (uint32)
{
var _tokens = tokensOf(_address);
uint32 _totalBP = 0;
for (uint256 i = 0; i < _tokens.length; i ++) {
_totalBP += getHeroBP(_tokens[i]);
}
return _totalBP;
}
// @dev Set the hero's name.
function setHeroName(uint256 _tokenId, string _name)
onlyOwnerOf(_tokenId)
public
{
tokenIdToHeroInstance[_tokenId].heroName = _name;
}
// @dev Set the address of the contract that represents ERC20 Gold.
function setGoldContract(address _contractAddress)
onlyOwner
public
{
goldContract = Gold(_contractAddress);
}
// @dev Set the required golds to level up a hero.
function setRequiredExpIncreaseFactor(uint32 _value)
onlyOwner
public
{
requiredExpIncreaseFactor = _value;
}
// @dev Set the required golds to level up a hero.
function setRequiredGoldIncreaseFactor(uint256 _value)
onlyOwner
public
{
requiredGoldIncreaseFactor = _value;
}
// @dev Contructor.
function CryptoSagaHero(address _goldAddress)
public
{
require(_goldAddress != address(0));
// Assign Gold contract.
setGoldContract(_goldAddress);
// Initial heroes.
// Name, Rank, Race, Age, Type, Max Level, Aura, Stats.
defineType("Archangel", 4, 1, 13540, 0, 99, 3, [uint32(74), 75, 57, 99, 95], [uint32(8), 6, 8, 5, 5], [uint32(8), 10, 10, 6, 6]);
defineType("Shadowalker", 3, 4, 134, 1, 75, 4, [uint32(45), 35, 60, 80, 40], [uint32(3), 2, 10, 4, 5], [uint32(5), 5, 10, 7, 5]);
defineType("Pyromancer", 2, 0, 14, 2, 50, 1, [uint32(50), 28, 17, 40, 35], [uint32(5), 3, 2, 3, 3], [uint32(8), 4, 3, 4, 5]);
defineType("Magician", 1, 3, 224, 2, 30, 0, [uint32(35), 15, 25, 25, 30], [uint32(3), 1, 2, 2, 2], [uint32(5), 2, 3, 3, 3]);
defineType("Farmer", 0, 0, 59, 0, 15, 2, [uint32(10), 22, 8, 15, 25], [uint32(1), 2, 1, 1, 2], [uint32(1), 3, 1, 2, 3]);
}
// @dev Define a new hero type (class).
function defineType(string _className, uint8 _classRank, uint8 _classRace, uint32 _classAge, uint8 _classType, uint32 _maxLevel, uint8 _aura, uint32[5] _baseStats, uint32[5] _minIVForStats, uint32[5] _maxIVForStats)
onlyOwner
public
{
require(_classRank < 5);
require(_classType < 3);
require(_aura < 5);
require(_minIVForStats[0] <= _maxIVForStats[0] && _minIVForStats[1] <= _maxIVForStats[1] && _minIVForStats[2] <= _maxIVForStats[2] && _minIVForStats[3] <= _maxIVForStats[3] && _minIVForStats[4] <= _maxIVForStats[4]);
HeroClass memory _heroType = HeroClass({
className: _className,
classRank: _classRank,
classRace: _classRace,
classAge: _classAge,
classType: _classType,
maxLevel: _maxLevel,
aura: _aura,
baseStats: _baseStats,
minIVForStats: _minIVForStats,
maxIVForStats: _maxIVForStats,
currentNumberOfInstancedHeroes: 0
});
// Save the hero class.
heroClasses[numberOfHeroClasses] = _heroType;
// Fire event.
DefineType(msg.sender, numberOfHeroClasses, _heroType.className);
// Increment number of hero classes.
numberOfHeroClasses ++;
}
// @dev Mint a new hero, with _heroClassId.
function mint(address _owner, uint32 _heroClassId)
onlyAccessMint
public
returns (uint256)
{
require(_owner != address(0));
require(_heroClassId < numberOfHeroClasses);
// The information of the hero's class.
var _heroClassInfo = heroClasses[_heroClassId];
// Mint ERC721 token.
_mint(_owner, numberOfTokenIds);
// Build random IVs for this hero instance.
uint32[5] memory _ivForStats;
uint32[5] memory _initialStats;
for (uint8 i = 0; i < 5; i++) {
_ivForStats[i] = (random(_heroClassInfo.maxIVForStats[i] + 1, _heroClassInfo.minIVForStats[i]));
_initialStats[i] = _heroClassInfo.baseStats[i] + _ivForStats[i];
}
// Temporary hero instance.
HeroInstance memory _heroInstance = HeroInstance({
heroClassId: _heroClassId,
heroName: "",
currentLevel: 1,
currentExp: 0,
lastLocationId: 0,
availableAt: now,
currentStats: _initialStats,
ivForStats: _ivForStats
});
// Save the hero instance.
tokenIdToHeroInstance[numberOfTokenIds] = _heroInstance;
// Increment number of token ids.
// This will only increment when new token is minted, and will never be decemented when the token is burned.
numberOfTokenIds ++;
// Increment instanced number of heroes.
_heroClassInfo.currentNumberOfInstancedHeroes ++;
return numberOfTokenIds - 1;
}
// @dev Set where the heroes are deployed, and when they will return.
// This is intended to be called by Dungeon, Arena, Guild contracts.
function deploy(uint256 _tokenId, uint32 _locationId, uint256 _duration)
onlyAccessDeploy
public
returns (bool)
{
// The hero should be possessed by anybody.
require(ownerOf(_tokenId) != address(0));
var _heroInstance = tokenIdToHeroInstance[_tokenId];
// The character should be avaiable.
require(_heroInstance.availableAt <= now);
_heroInstance.lastLocationId = _locationId;
_heroInstance.availableAt = now + _duration;
// As the hero has been deployed to another place, fire event.
Deploy(msg.sender, _tokenId, _locationId, _duration);
}
// @dev Add exp.
// This is intended to be called by Dungeon, Arena, Guild contracts.
function addExp(uint256 _tokenId, uint32 _exp)
onlyAccessDeploy
public
returns (bool)
{
// The hero should be possessed by anybody.
require(ownerOf(_tokenId) != address(0));
var _heroInstance = tokenIdToHeroInstance[_tokenId];
var _newExp = _heroInstance.currentExp + _exp;
// Sanity check to ensure we don't overflow.
require(_newExp == uint256(uint128(_newExp)));
_heroInstance.currentExp += _newExp;
}
// @dev Add deposit.
// This is intended to be called by Dungeon, Arena, Guild contracts.
function addDeposit(address _to, uint256 _amount)
onlyAccessDeposit
public
{
// Increment deposit.
addressToGoldDeposit[_to] += _amount;
}
// @dev Level up the hero with _tokenId.
// This function is called by the owner of the hero.
function levelUp(uint256 _tokenId)
onlyOwnerOf(_tokenId) whenNotPaused
public
{
// Hero instance.
var _heroInstance = tokenIdToHeroInstance[_tokenId];
// The character should be avaiable. (Should have already returned from the dungeons, arenas, etc.)
require(_heroInstance.availableAt <= now);
// The information of the hero's class.
var _heroClassInfo = heroClasses[_heroInstance.heroClassId];
// Hero shouldn't level up exceed its max level.
require(_heroInstance.currentLevel < _heroClassInfo.maxLevel);
// Required Exp.
var requiredExp = getHeroRequiredExpForLevelUp(_tokenId);
// Need to have enough exp.
require(_heroInstance.currentExp >= requiredExp);
// Required Gold.
var requiredGold = getHeroRequiredGoldForLevelUp(_tokenId);
// Owner of token.
var _ownerOfToken = ownerOf(_tokenId);
// Need to have enough Gold balance.
require(addressToGoldDeposit[_ownerOfToken] >= requiredGold);
// Increase Level.
_heroInstance.currentLevel += 1;
// Increase Stats.
for (uint8 i = 0; i < 5; i++) {
_heroInstance.currentStats[i] = _heroClassInfo.baseStats[i] + (_heroInstance.currentLevel - 1) * _heroInstance.ivForStats[i];
}
// Deduct exp.
_heroInstance.currentExp -= requiredExp;
// Deduct gold.
addressToGoldDeposit[_ownerOfToken] -= requiredGold;
// Fire event.
LevelUp(msg.sender, _tokenId, _heroInstance.currentLevel);
}
// @dev Transfer deposit (with the allowance pattern.)
function transferDeposit(uint256 _amount)
whenNotPaused
public
{
require(goldContract.allowance(msg.sender, this) >= _amount);
// Send msg.sender's Gold to this contract.
if (goldContract.transferFrom(msg.sender, this, _amount)) {
// Increment deposit.
addressToGoldDeposit[msg.sender] += _amount;
}
}
// @dev Withdraw deposit.
function withdrawDeposit(uint256 _amount)
public
{
require(addressToGoldDeposit[msg.sender] >= _amount);
// Send deposit of Golds to msg.sender. (Rather minting...)
if (goldContract.transfer(msg.sender, _amount)) {
// Decrement deposit.
addressToGoldDeposit[msg.sender] -= _amount;
}
}
// @dev return a pseudo random number between lower and upper bounds
function random(uint32 _upper, uint32 _lower)
private
returns (uint32)
{
require(_upper > _lower);
seed = uint32(keccak256(keccak256(block.blockhash(block.number), seed), now));
return seed % (_upper - _lower) + _lower;
}
}
/**
* @title CryptoSagaCorrectedHeroStats
* @dev Corrected hero stats is needed to fix the bug in hero stats.
*/
contract CryptoSagaCorrectedHeroStats {
// The hero contract.
CryptoSagaHero private heroContract;
// @dev Constructor.
function CryptoSagaCorrectedHeroStats(address _heroContractAddress)
public
{
heroContract = CryptoSagaHero(_heroContractAddress);
}
// @dev Get the hero's stats and some other infomation.
function getCorrectedStats(uint256 _tokenId)
external view
returns (uint32 currentLevel, uint32 currentExp, uint32[5] currentStats, uint32[5] ivs, uint32 bp)
{
var (, , _currentLevel, _currentExp, , , _currentStats, _ivs, ) = heroContract.getHeroInfo(_tokenId);
if (_currentLevel != 1) {
for (uint8 i = 0; i < 5; i ++) {
_currentStats[i] += _ivs[i];
}
}
var _bp = _currentStats[0] + _currentStats[1] + _currentStats[2] + _currentStats[3] + _currentStats[4];
return (_currentLevel, _currentExp, _currentStats, _ivs, _bp);
}
// @dev Get corrected total BP of the address.
function getCorrectedTotalBPOfAddress(address _address)
external view
returns (uint32)
{
var _balance = heroContract.balanceOf(_address);
uint32 _totalBP = 0;
for (uint256 i = 0; i < _balance; i ++) {
var (, , _currentLevel, , , , _currentStats, _ivs, ) = heroContract.getHeroInfo(heroContract.getTokenIdOfAddressAndIndex(_address, i));
if (_currentLevel != 1) {
for (uint8 j = 0; j < 5; j ++) {
_currentStats[j] += _ivs[j];
}
}
_totalBP += (_currentStats[0] + _currentStats[1] + _currentStats[2] + _currentStats[3] + _currentStats[4]);
}
return _totalBP;
}
// @dev Get corrected total BP of the address.
function getCorrectedTotalBPOfTokens(uint256[] _tokens)
external view
returns (uint32)
{
uint32 _totalBP = 0;
for (uint256 i = 0; i < _tokens.length; i ++) {
var (, , _currentLevel, , , , _currentStats, _ivs, ) = heroContract.getHeroInfo(_tokens[i]);
if (_currentLevel != 1) {
for (uint8 j = 0; j < 5; j ++) {
_currentStats[j] += _ivs[j];
}
}
_totalBP += (_currentStats[0] + _currentStats[1] + _currentStats[2] + _currentStats[3] + _currentStats[4]);
}
return _totalBP;
}
}
/**
* @title CryptoSagaArenaRecord
* @dev The record of battles in the Arena.
*/
contract CryptoSagaArenaRecord is Pausable, AccessDeploy {
// Number of players for the leaderboard.
uint8 public numberOfLeaderboardPlayers = 25;
// Top players in the leaderboard.
address[] public leaderBoardPlayers;
// For checking whether the player is in the leaderboard.
mapping(address => bool) public addressToIsInLeaderboard;
// Number of recent player recorded for matchmaking.
uint8 public numberOfRecentPlayers = 50;
// List of recent players.
address[] public recentPlayers;
// Front of recent players.
uint256 public recentPlayersFront;
// Back of recent players.
uint256 public recentPlayersBack;
// Record of each player.
mapping(address => uint32) public addressToElo;
// Event that is fired when a new change has been made to the leaderboard.
event UpdateLeaderboard(
address indexed _by,
uint256 _dateTime
);
// @dev Get elo rating of a player.
function getEloRating(address _address)
external view
returns (uint32)
{
if (addressToElo[_address] != 0)
return addressToElo[_address];
else
return 1500;
}
// @dev Get players in the leaderboard.
function getLeaderboardPlayers()
external view
returns (address[])
{
return leaderBoardPlayers;
}
// @dev Get current length of the leaderboard.
function getLeaderboardLength()
external view
returns (uint256)
{
return leaderBoardPlayers.length;
}
// @dev Get recently played players.
function getRecentPlayers()
external view
returns (address[])
{
return recentPlayers;
}
// @dev Get current number of players in the recently played players queue.
function getRecentPlayersCount()
public view
returns (uint256)
{
return recentPlayersBack - recentPlayersFront;
}
// @dev Constructor.
function CryptoSagaArenaRecord(
address _previousSeasonRecord,
uint8 _numberOfLeaderboardPlayers,
uint8 _numberOfRecentPlayers)
public
{
numberOfLeaderboardPlayers = _numberOfLeaderboardPlayers;
numberOfRecentPlayers = _numberOfRecentPlayers;
// Get instance of previous season.
CryptoSagaArenaRecord _previous = CryptoSagaArenaRecord(_previousSeasonRecord);
for (uint256 i = _previous.recentPlayersFront(); i < _previous.recentPlayersBack(); i++) {
var _player = _previous.recentPlayers(i);
// The initial player's Elo.
addressToElo[_player] = _previous.getEloRating(_player);
}
}
// @dev Update record.
function updateRecord(address _myAddress, address _enemyAddress, bool _didWin)
whenNotPaused onlyAccessDeploy
public
{
address _winnerAddress = _didWin? _myAddress: _enemyAddress;
address _loserAddress = _didWin? _enemyAddress: _myAddress;
// Initial value of Elo.
uint32 _winnerElo = addressToElo[_winnerAddress];
if (_winnerElo == 0)
_winnerElo = 1500;
uint32 _loserElo = addressToElo[_loserAddress];
if (_loserElo == 0)
_loserElo = 1500;
// Adjust Elo.
if (_winnerElo >= _loserElo) {
if (_winnerElo - _loserElo < 50) {
addressToElo[_winnerAddress] = _winnerElo + 5;
addressToElo[_loserAddress] = _loserElo - 5;
} else if (_winnerElo - _loserElo < 80) {
addressToElo[_winnerAddress] = _winnerElo + 4;
addressToElo[_loserAddress] = _loserElo - 4;
} else if (_winnerElo - _loserElo < 150) {
addressToElo[_winnerAddress] = _winnerElo + 3;
addressToElo[_loserAddress] = _loserElo - 3;
} else if (_winnerElo - _loserElo < 250) {
addressToElo[_winnerAddress] = _winnerElo + 2;
addressToElo[_loserAddress] = _loserElo - 2;
} else {
addressToElo[_winnerAddress] = _winnerElo + 1;
addressToElo[_loserAddress] = _loserElo - 1;
}
} else {
if (_loserElo - _winnerElo < 50) {
addressToElo[_winnerAddress] = _winnerElo + 5;
addressToElo[_loserAddress] = _loserElo - 5;
} else if (_loserElo - _winnerElo < 80) {
addressToElo[_winnerAddress] = _winnerElo + 6;
addressToElo[_loserAddress] = _loserElo - 6;
} else if (_loserElo - _winnerElo < 150) {
addressToElo[_winnerAddress] = _winnerElo + 7;
addressToElo[_loserAddress] = _loserElo - 7;
} else if (_loserElo - _winnerElo < 250) {
addressToElo[_winnerAddress] = _winnerElo + 8;
addressToElo[_loserAddress] = _loserElo - 8;
} else {
addressToElo[_winnerAddress] = _winnerElo + 9;
addressToElo[_loserAddress] = _loserElo - 9;
}
}
// Update recent players list.
if (!isPlayerInQueue(_myAddress)) {
// If the queue is full, pop a player.
if (getRecentPlayersCount() >= numberOfRecentPlayers)
popPlayer();
// Push _myAddress to the queue.
pushPlayer(_myAddress);
}
// Update leaderboards.
if(updateLeaderboard(_enemyAddress) || updateLeaderboard(_myAddress))
{
UpdateLeaderboard(_myAddress, now);
}
}
// @dev Update leaderboard.
function updateLeaderboard(address _addressToUpdate)
whenNotPaused
private
returns (bool isChanged)
{
// If this players is already in the leaderboard, there's no need for replace the minimum recorded player.
if (addressToIsInLeaderboard[_addressToUpdate]) {
// Do nothing.
} else {
if (leaderBoardPlayers.length >= numberOfLeaderboardPlayers) {
// Need to replace existing player.
// First, we need to find the player with miminum Elo value.
uint32 _minimumElo = 99999;
uint8 _minimumEloPlayerIndex = numberOfLeaderboardPlayers;
for (uint8 i = 0; i < leaderBoardPlayers.length; i ++) {
if (_minimumElo > addressToElo[leaderBoardPlayers[i]]) {
_minimumElo = addressToElo[leaderBoardPlayers[i]];
_minimumEloPlayerIndex = i;
}
}
// Second, if the minimum elo value is smaller than the player's elo value, then replace the entity.
if (_minimumElo <= addressToElo[_addressToUpdate]) {
addressToIsInLeaderboard[leaderBoardPlayers[_minimumEloPlayerIndex]] = false;
leaderBoardPlayers[_minimumEloPlayerIndex] = _addressToUpdate;
addressToIsInLeaderboard[_addressToUpdate] = true;
isChanged = true;
}
} else {
// The list is not full yet.
// Just add the player to the list.
leaderBoardPlayers.push(_addressToUpdate);
addressToIsInLeaderboard[_addressToUpdate] = true;
isChanged = true;
}
}
}
// #dev Check whether contain the element or not.
function isPlayerInQueue(address _player)
view private
returns (bool isContain)
{
isContain = false;
for (uint256 i = recentPlayersFront; i < recentPlayersBack; i++) {
if (_player == recentPlayers[i]) {
isContain = true;
}
}
}
// @dev Push a new player into the queue.
function pushPlayer(address _player)
private
{
recentPlayers.push(_player);
recentPlayersBack++;
}
// @dev Pop the oldest player in this queue.
function popPlayer()
private
returns (address player)
{
if (recentPlayersBack == recentPlayersFront)
return address(0);
player = recentPlayers[recentPlayersFront];
delete recentPlayers[recentPlayersFront];
recentPlayersFront++;
}
} | * @title CryptoSagaCorrectedHeroStats @dev Corrected hero stats is needed to fix the bug in hero stats./ The hero contract. @dev Constructor. | contract CryptoSagaCorrectedHeroStats {
CryptoSagaHero private heroContract;
function CryptoSagaCorrectedHeroStats(address _heroContractAddress)
public
{
heroContract = CryptoSagaHero(_heroContractAddress);
}
function getCorrectedStats(uint256 _tokenId)
external view
returns (uint32 currentLevel, uint32 currentExp, uint32[5] currentStats, uint32[5] ivs, uint32 bp)
{
var (, , _currentLevel, _currentExp, , , _currentStats, _ivs, ) = heroContract.getHeroInfo(_tokenId);
if (_currentLevel != 1) {
for (uint8 i = 0; i < 5; i ++) {
_currentStats[i] += _ivs[i];
}
}
var _bp = _currentStats[0] + _currentStats[1] + _currentStats[2] + _currentStats[3] + _currentStats[4];
return (_currentLevel, _currentExp, _currentStats, _ivs, _bp);
}
function getCorrectedStats(uint256 _tokenId)
external view
returns (uint32 currentLevel, uint32 currentExp, uint32[5] currentStats, uint32[5] ivs, uint32 bp)
{
var (, , _currentLevel, _currentExp, , , _currentStats, _ivs, ) = heroContract.getHeroInfo(_tokenId);
if (_currentLevel != 1) {
for (uint8 i = 0; i < 5; i ++) {
_currentStats[i] += _ivs[i];
}
}
var _bp = _currentStats[0] + _currentStats[1] + _currentStats[2] + _currentStats[3] + _currentStats[4];
return (_currentLevel, _currentExp, _currentStats, _ivs, _bp);
}
function getCorrectedStats(uint256 _tokenId)
external view
returns (uint32 currentLevel, uint32 currentExp, uint32[5] currentStats, uint32[5] ivs, uint32 bp)
{
var (, , _currentLevel, _currentExp, , , _currentStats, _ivs, ) = heroContract.getHeroInfo(_tokenId);
if (_currentLevel != 1) {
for (uint8 i = 0; i < 5; i ++) {
_currentStats[i] += _ivs[i];
}
}
var _bp = _currentStats[0] + _currentStats[1] + _currentStats[2] + _currentStats[3] + _currentStats[4];
return (_currentLevel, _currentExp, _currentStats, _ivs, _bp);
}
function getCorrectedTotalBPOfAddress(address _address)
external view
returns (uint32)
{
var _balance = heroContract.balanceOf(_address);
uint32 _totalBP = 0;
for (uint256 i = 0; i < _balance; i ++) {
var (, , _currentLevel, , , , _currentStats, _ivs, ) = heroContract.getHeroInfo(heroContract.getTokenIdOfAddressAndIndex(_address, i));
if (_currentLevel != 1) {
for (uint8 j = 0; j < 5; j ++) {
_currentStats[j] += _ivs[j];
}
}
_totalBP += (_currentStats[0] + _currentStats[1] + _currentStats[2] + _currentStats[3] + _currentStats[4]);
}
return _totalBP;
}
function getCorrectedTotalBPOfAddress(address _address)
external view
returns (uint32)
{
var _balance = heroContract.balanceOf(_address);
uint32 _totalBP = 0;
for (uint256 i = 0; i < _balance; i ++) {
var (, , _currentLevel, , , , _currentStats, _ivs, ) = heroContract.getHeroInfo(heroContract.getTokenIdOfAddressAndIndex(_address, i));
if (_currentLevel != 1) {
for (uint8 j = 0; j < 5; j ++) {
_currentStats[j] += _ivs[j];
}
}
_totalBP += (_currentStats[0] + _currentStats[1] + _currentStats[2] + _currentStats[3] + _currentStats[4]);
}
return _totalBP;
}
function getCorrectedTotalBPOfAddress(address _address)
external view
returns (uint32)
{
var _balance = heroContract.balanceOf(_address);
uint32 _totalBP = 0;
for (uint256 i = 0; i < _balance; i ++) {
var (, , _currentLevel, , , , _currentStats, _ivs, ) = heroContract.getHeroInfo(heroContract.getTokenIdOfAddressAndIndex(_address, i));
if (_currentLevel != 1) {
for (uint8 j = 0; j < 5; j ++) {
_currentStats[j] += _ivs[j];
}
}
_totalBP += (_currentStats[0] + _currentStats[1] + _currentStats[2] + _currentStats[3] + _currentStats[4]);
}
return _totalBP;
}
function getCorrectedTotalBPOfAddress(address _address)
external view
returns (uint32)
{
var _balance = heroContract.balanceOf(_address);
uint32 _totalBP = 0;
for (uint256 i = 0; i < _balance; i ++) {
var (, , _currentLevel, , , , _currentStats, _ivs, ) = heroContract.getHeroInfo(heroContract.getTokenIdOfAddressAndIndex(_address, i));
if (_currentLevel != 1) {
for (uint8 j = 0; j < 5; j ++) {
_currentStats[j] += _ivs[j];
}
}
_totalBP += (_currentStats[0] + _currentStats[1] + _currentStats[2] + _currentStats[3] + _currentStats[4]);
}
return _totalBP;
}
function getCorrectedTotalBPOfTokens(uint256[] _tokens)
external view
returns (uint32)
{
uint32 _totalBP = 0;
for (uint256 i = 0; i < _tokens.length; i ++) {
var (, , _currentLevel, , , , _currentStats, _ivs, ) = heroContract.getHeroInfo(_tokens[i]);
if (_currentLevel != 1) {
for (uint8 j = 0; j < 5; j ++) {
_currentStats[j] += _ivs[j];
}
}
_totalBP += (_currentStats[0] + _currentStats[1] + _currentStats[2] + _currentStats[3] + _currentStats[4]);
}
return _totalBP;
}
function getCorrectedTotalBPOfTokens(uint256[] _tokens)
external view
returns (uint32)
{
uint32 _totalBP = 0;
for (uint256 i = 0; i < _tokens.length; i ++) {
var (, , _currentLevel, , , , _currentStats, _ivs, ) = heroContract.getHeroInfo(_tokens[i]);
if (_currentLevel != 1) {
for (uint8 j = 0; j < 5; j ++) {
_currentStats[j] += _ivs[j];
}
}
_totalBP += (_currentStats[0] + _currentStats[1] + _currentStats[2] + _currentStats[3] + _currentStats[4]);
}
return _totalBP;
}
function getCorrectedTotalBPOfTokens(uint256[] _tokens)
external view
returns (uint32)
{
uint32 _totalBP = 0;
for (uint256 i = 0; i < _tokens.length; i ++) {
var (, , _currentLevel, , , , _currentStats, _ivs, ) = heroContract.getHeroInfo(_tokens[i]);
if (_currentLevel != 1) {
for (uint8 j = 0; j < 5; j ++) {
_currentStats[j] += _ivs[j];
}
}
_totalBP += (_currentStats[0] + _currentStats[1] + _currentStats[2] + _currentStats[3] + _currentStats[4]);
}
return _totalBP;
}
function getCorrectedTotalBPOfTokens(uint256[] _tokens)
external view
returns (uint32)
{
uint32 _totalBP = 0;
for (uint256 i = 0; i < _tokens.length; i ++) {
var (, , _currentLevel, , , , _currentStats, _ivs, ) = heroContract.getHeroInfo(_tokens[i]);
if (_currentLevel != 1) {
for (uint8 j = 0; j < 5; j ++) {
_currentStats[j] += _ivs[j];
}
}
_totalBP += (_currentStats[0] + _currentStats[1] + _currentStats[2] + _currentStats[3] + _currentStats[4]);
}
return _totalBP;
}
}
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./full_match/5/0x6F33c38298a1D50fdae35af410Bba2D6eF1CFead/sources/src/interfaces/ILockedRevenueDistributionToken.sol | * @notice Emitted when an account cancels any existing withdrawal requests. @param pos_ Index/position of the withdrawal request cancelled./ | event WithdrawalRequestCancelled(uint256 pos_);
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pragma solidity 0.5.8;
pragma experimental ABIEncoderV2;
import "./IERC20.sol";
import "./IERC721.sol";
import "./SafeMath.sol";
/// @title EthlanceJob
/// @dev A contract for issuing jobs on Ethereum paying in ETH, ERC20, or ERC721 tokens
/// @author Mark Beylin <[email protected]>, Gonçalo Sá <[email protected]>, Kevin Owocki <[email protected]>, Ricardo Guilherme Schmidt (@3esmit), Matt Garnett <[email protected]>, Craig Williams <[email protected]>
contract EthlanceJobs {
using SafeMath for uint256;
/*
* Structs
*/
struct Job {
address payable[] issuers; // An array of individuals who have complete control over the job, and can edit any of its parameters
address[] approvers; // An array of individuals who are allowed to accept the invoices for a particular job
address token; // The address of the token associated with the job (should be disregarded if the tokenVersion is 0)
uint tokenVersion; // The version of the token being used for the job (0 for ETH, 20 for ERC20, 721 for ERC721)
uint balance; // The number of tokens which the job is able to pay out or refund
Invoice[] invoices; // An array of Invoice which store the various submissions which have been made to the job
Contribution[] contributions; // An array of Contributions which store the contributions which have been made to the job
address[] hiredCandidates;
}
struct Invoice {
address payable issuer; // Address who should receive payouts for a given submission
address submitter;
uint amount;
bool cancelled;
}
struct Contribution {
address payable contributor; // The address of the individual who contributed
uint amount; // The amount of tokens the user contributed
bool refunded; // A boolean storing whether or not the contribution has been refunded yet
}
/*
* Storage
*/
uint public numJobs; // An integer storing the total number of jobs in the contract
mapping(uint => Job) public jobs; // A mapping of jobIDs to jobs
mapping (uint => mapping (uint => bool)) public tokenBalances; // A mapping of jobIds to tokenIds to booleans, storing whether a given job has a given ERC721 token in its balance
address public owner; // The address of the individual who's allowed to set the metaTxRelayer address
address public metaTxRelayer; // The address of the meta transaction relayer whose _sender is automatically trusted for all contract calls
bool public callStarted; // Ensures mutex for the entire contract
/*
* Modifiers
*/
modifier callNotStarted(){
require(!callStarted);
callStarted = true;
_;
callStarted = false;
}
modifier validateJobArrayIndex(
uint _index)
{
require(_index < numJobs);
_;
}
modifier validateContributionArrayIndex(
uint _jobId,
uint _index)
{
require(_index < jobs[_jobId].contributions.length);
_;
}
modifier validateInvoiceArrayIndex(
uint _jobId,
uint _index)
{
require(_index < jobs[_jobId].invoices.length);
_;
}
modifier validateIssuerArrayIndex(
uint _jobId,
uint _index)
{
require(_index < jobs[_jobId].issuers.length);
_;
}
modifier validateApproverArrayIndex(
uint _jobId,
uint _index)
{
require(_index < jobs[_jobId].approvers.length);
_;
}
modifier onlyIssuer(
address _sender,
uint _jobId,
uint _issuerId)
{
require(_sender == jobs[_jobId].issuers[_issuerId]);
_;
}
modifier onlyInvoiceIssuer(
address _sender,
uint _jobId,
uint _invoiceId)
{
require(_sender ==
jobs[_jobId].invoices[_invoiceId].issuer);
_;
}
modifier onlyContributor(
address _sender,
uint _jobId,
uint _contributionId)
{
require(_sender ==
jobs[_jobId].contributions[_contributionId].contributor);
_;
}
modifier isApprover(
address _sender,
uint _jobId,
uint _approverId)
{
require(_sender == jobs[_jobId].approvers[_approverId]);
_;
}
modifier hasNotRefunded(
uint _jobId,
uint _contributionId)
{
require(!jobs[_jobId].contributions[_contributionId].refunded);
_;
}
modifier senderIsValid(
address _sender)
{
require(msg.sender == _sender || msg.sender == metaTxRelayer);
_;
}
/*
* Public functions
*/
constructor() public {
// The owner of the contract is automatically designated to be the deployer of the contract
owner = msg.sender;
}
/// @dev setMetaTxRelayer(): Sets the address of the meta transaction relayer
/// @param _relayer the address of the relayer
function setMetaTxRelayer(address _relayer)
external
{
require(msg.sender == owner); // Checks that only the owner can call
require(metaTxRelayer == address(0)); // Ensures the meta tx relayer can only be set once
metaTxRelayer = _relayer;
}
function contains(address[] memory arr, address x) private pure returns(bool)
{
bool found = false;
uint i = 0;
while(i < arr.length && !found){
found = arr[i] == x;
i++;
}
return found;
}
function acceptCandidate(uint jobId, address candidate)
public
{
// Add the candidate as selected for the job
jobs[jobId].hiredCandidates.push(candidate);
emit CandidateAccepted(jobId, candidate);
}
/// @dev issueJob(): creates a new job
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _issuers the array of addresses who will be the issuers of the job
/// @param _approvers the array of addresses who will be the approvers of the job
/// @param _ipfsHash the IPFS hash representing the JSON object storing the details of the job (see docs for schema details)
/// @param _token the address of the token which will be used for the job
/// @param _tokenVersion the version of the token being used for the job (0 for ETH, 20 for ERC20, 721 for ERC721)
function issueJob(
address payable _sender,
address payable[] memory _issuers,
address[] memory _approvers,
string memory _ipfsHash,
address _token,
uint _tokenVersion)
public
senderIsValid(_sender)
returns (uint)
{
require(_tokenVersion == 0 || _tokenVersion == 20 || _tokenVersion == 721); // Ensures a job can only be issued with a valid token version
require(_issuers.length > 0 || _approvers.length > 0); // Ensures there's at least 1 issuer or approver
uint jobId = numJobs; // The next job's index will always equal the number of existing jobs
Job storage newJob = jobs[jobId];
newJob.issuers = _issuers;
newJob.approvers = _approvers;
newJob.tokenVersion = _tokenVersion;
if (_tokenVersion != 0){
newJob.token = _token;
}
numJobs = numJobs.add(1); // Increments the number of jobs, since a new one has just been added
emit JobIssued(jobId,
_sender,
_issuers,
_approvers,
_ipfsHash, // Instead of storing the string on-chain, it is emitted within the event for easy off-chain consumption
_token,
_tokenVersion);
return (jobId);
}
/// @param _depositAmount the amount of tokens being deposited to the job, which will create a new contribution to the job
function issueAndContribute(
address payable _sender,
address payable[] memory _issuers,
address[] memory _approvers,
string memory _ipfsHash,
address _token,
uint _tokenVersion,
uint _depositAmount)
public
payable
returns(uint)
{
uint jobId = issueJob(_sender, _issuers, _approvers, _ipfsHash, _token, _tokenVersion);
contribute(_sender, jobId, _depositAmount);
return (jobId);
}
/// @dev contribute(): Allows users to contribute tokens to a given job.
/// Contributing merits no privelages to administer the
/// funds in the job or accept submissions. Contributions
/// has elapsed, and the job has not yet paid out any funds.
/// All funds deposited in a job are at the mercy of a
/// job's issuers and approvers, so please be careful!
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _amount the amount of tokens being contributed
function contribute(
address payable _sender,
uint _jobId,
uint _amount)
public
payable
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
callNotStarted
{
require(_amount > 0); // Contributions of 0 tokens or token ID 0 should fail
jobs[_jobId].contributions.push(
Contribution(_sender, _amount, false)); // Adds the contribution to the job
if (jobs[_jobId].tokenVersion == 0){
jobs[_jobId].balance = jobs[_jobId].balance.add(_amount); // Increments the balance of the job
require(msg.value == _amount);
} else if (jobs[_jobId].tokenVersion == 20){
jobs[_jobId].balance = jobs[_jobId].balance.add(_amount); // Increments the balance of the job
require(msg.value == 0); // Ensures users don't accidentally send ETH alongside a token contribution, locking up funds
require(IERC20(jobs[_jobId].token).transferFrom(_sender,
address(this),
_amount));
} else if (jobs[_jobId].tokenVersion == 721){
tokenBalances[_jobId][_amount] = true; // Adds the 721 token to the balance of the job
require(msg.value == 0); // Ensures users don't accidentally send ETH alongside a token contribution, locking up funds
IERC721(jobs[_jobId].token).transferFrom(_sender,
address(this),
_amount);
} else {
revert();
}
emit ContributionAdded(_jobId,
jobs[_jobId].contributions.length - 1, // The new contributionId
_sender,
_amount);
}
/// @dev refundContribution(): Allows users to refund the contributions they've
/// made to a particular job, but only if the job
/// has not yet paid out
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _issuerId the issuer id for thre job
/// @param _jobId the index of the job
/// @param _contributionId the index of the contribution being refunded
function refundContribution(
address _sender,
uint _jobId,
uint _issuerId,
uint _contributionId)
public
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
validateContributionArrayIndex(_jobId, _contributionId)
onlyIssuer(_sender, _jobId, _issuerId)
hasNotRefunded(_jobId, _contributionId)
callNotStarted
{
Contribution storage contribution = jobs[_jobId].contributions[_contributionId];
contribution.refunded = true;
transferTokens(_jobId, contribution.contributor, contribution.amount); // Performs the disbursal of tokens to the contributor
emit ContributionRefunded(_jobId, _contributionId);
}
/// @dev refundMyContributions(): Allows users to refund their contributions in bulk
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _contributionIds the array of indexes of the contributions being refunded
function refundMyContributions(
address _sender,
uint _jobId,
uint _issuerId,
uint[] memory _contributionIds)
public
senderIsValid(_sender)
{
for (uint i = 0; i < _contributionIds.length; i++){
refundContribution(_sender, _jobId, _issuerId, _contributionIds[i]);
}
}
/// @dev refundContributions(): Allows users to refund their contributions in bulk
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _issuerId the index of the issuer who is making the call
/// @param _contributionIds the array of indexes of the contributions being refunded
function refundContributions(
address _sender,
uint _jobId,
uint _issuerId,
uint[] memory _contributionIds)
public
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
onlyIssuer(_sender, _jobId, _issuerId)
callNotStarted
{
for (uint i = 0; i < _contributionIds.length; i++){
require(_contributionIds[i] < jobs[_jobId].contributions.length);
Contribution storage contribution = jobs[_jobId].contributions[_contributionIds[i]];
require(!contribution.refunded);
contribution.refunded = true;
transferTokens(_jobId, contribution.contributor, contribution.amount); // Performs the disbursal of tokens to the contributor
}
emit ContributionsRefunded(_jobId, _sender, _contributionIds);
}
/// @dev drainJob(): Allows an issuer to drain the funds from the job
/// @notice when using this function, if an issuer doesn't drain the entire balance, some users may be able to refund their contributions, while others may not (which is unfair to them). Please use it wisely, only when necessary
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _issuerId the index of the issuer who is making the call
/// @param _amounts an array of amounts of tokens to be sent. The length of the array should be 1 if the job is in ETH or ERC20 tokens. If it's an ERC721 job, the array should be the list of tokenIDs.
function drainJob(
address payable _sender,
uint _jobId,
uint _issuerId,
uint[] memory _amounts)
public
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
onlyIssuer(_sender, _jobId, _issuerId)
callNotStarted
{
if (jobs[_jobId].tokenVersion == 0 || jobs[_jobId].tokenVersion == 20){
require(_amounts.length == 1); // ensures there's only 1 amount of tokens to be returned
require(_amounts[0] <= jobs[_jobId].balance); // ensures an issuer doesn't try to drain the job of more tokens than their balance permits
transferTokens(_jobId, _sender, _amounts[0]); // Performs the draining of tokens to the issuer
} else {
for (uint i = 0; i < _amounts.length; i++){
require(tokenBalances[_jobId][_amounts[i]]);// ensures an issuer doesn't try to drain the job of a token it doesn't have in its balance
transferTokens(_jobId, _sender, _amounts[i]);
}
}
emit JobDrained(_jobId, _sender, _amounts);
}
/// @dev invoiceJob(): Allows users to invoice the job to get paid out
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _invoiceIssuer The invoice issuer, the addresses which will receive payouts for the submission
/// @param _ipfsHash the IPFS hash corresponding to a JSON object which contains the details of the submission (see docs for schema details)
function invoiceJob(
address _sender,
uint _jobId,
address payable _invoiceIssuer,
string memory _ipfsHash,
uint _amount)
public
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
{
require(contains(jobs[_jobId].hiredCandidates, _sender));
jobs[_jobId].invoices.push(Invoice(_invoiceIssuer, _sender, _amount, false));
emit JobInvoice(_jobId,
(jobs[_jobId].invoices.length - 1),
_invoiceIssuer,
_ipfsHash, // The _ipfsHash string is emitted in an event for easy off-chain consumption
_sender,
_amount);
}
/// @dev cancelInvoice(): Allows the sender of the invoice to cancel it
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _invoiceId the index of the invoice to be accepted
function cancelInvoice(
address _sender,
uint _jobId,
uint _invoiceId
)
public
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
validateInvoiceArrayIndex(_jobId, _invoiceId)
{
Invoice storage invoice=jobs[_jobId].invoices[_invoiceId];
if(invoice.submitter != _sender){
revert("Only the original invoice sender can cancel it.");
}
invoice.cancelled=true;
emit InvoiceCancelled(_sender, _jobId, _invoiceId);
}
/// @dev acceptInvoice(): Allows any of the approvers to accept a given submission
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _invoiceId the index of the invoice to be accepted
/// @param _approverId the index of the approver which is making the call
function acceptInvoice(
address _sender,
uint _jobId,
uint _invoiceId,
uint _approverId
)
public
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
validateInvoiceArrayIndex(_jobId, _invoiceId)
isApprover(_sender, _jobId, _approverId)
callNotStarted
{
Invoice storage invoice = jobs[_jobId].invoices[_invoiceId];
if(invoice.cancelled){
revert("Can't accept a cancelled input");
}
transferTokens(_jobId, invoice.issuer,invoice.amount);
emit InvoiceAccepted(_jobId,
_invoiceId,
_sender,
invoice.amount);
}
/// @dev invoiceAndAccept(): Allows any of the approvers to invoice and accept a submission simultaneously
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _invoiceIssuer the array of addresses which will receive payouts for the submission
/// @param _ipfsHash the IPFS hash corresponding to a JSON object which contains the details of the submission (see docs for schema details)
/// @param _approverId the index of the approver which is making the call
function invoiceAndAccept(
address _sender,
uint _jobId,
address payable _invoiceIssuer,
string memory _ipfsHash,
uint _approverId,
uint _amount)
public
senderIsValid(_sender)
{
// first invoice the job on behalf of the _invoiceIssuer
invoiceJob(_sender, _jobId, _invoiceIssuer, _ipfsHash, _amount);
// then accepts the invoice
acceptInvoice(_sender,
_jobId,
jobs[_jobId].invoices.length - 1,
_approverId
);
}
/// @dev changeJob(): Allows any of the issuers to change the job
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _issuerId the index of the issuer who is calling the function
/// @param _issuers the new array of addresses who will be the issuers of the job
/// @param _approvers the new array of addresses who will be the approvers of the job
/// @param _ipfsHash the new IPFS hash representing the JSON object storing the details of the job (see docs for schema details)
function changeJob(
address _sender,
uint _jobId,
uint _issuerId,
address payable[] memory _issuers,
address payable[] memory _approvers,
string memory _ipfsHash
)
public
senderIsValid(_sender)
{
require(_jobId < numJobs); // makes the validateJobArrayIndex modifier in-line to avoid stack too deep errors
require(_issuerId < jobs[_jobId].issuers.length); // makes the validateIssuerArrayIndex modifier in-line to avoid stack too deep errors
require(_sender == jobs[_jobId].issuers[_issuerId]); // makes the onlyIssuer modifier in-line to avoid stack too deep errors
require(_issuers.length > 0 || _approvers.length > 0); // Ensures there's at least 1 issuer or approver, so funds don't get stuck
jobs[_jobId].issuers = _issuers;
jobs[_jobId].approvers = _approvers;
emit JobChanged(_jobId,
_sender,
_issuers,
_approvers,
_ipfsHash);
}
/// @dev changeIssuer(): Allows any of the issuers to change a particular issuer of the job
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _issuerId the index of the issuer who is calling the function
/// @param _issuerIdToChange the index of the issuer who is being changed
/// @param _newIssuer the address of the new issuer
function changeIssuer(
address _sender,
uint _jobId,
uint _issuerId,
uint _issuerIdToChange,
address payable _newIssuer)
public
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
validateIssuerArrayIndex(_jobId, _issuerIdToChange)
onlyIssuer(_sender, _jobId, _issuerId)
{
require(_issuerId < jobs[_jobId].issuers.length || _issuerId == 0);
jobs[_jobId].issuers[_issuerIdToChange] = _newIssuer;
emit JobIssuersUpdated(_jobId, _sender, jobs[_jobId].issuers);
}
/// @dev changeApprover(): Allows any of the issuers to change a particular approver of the job
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _issuerId the index of the issuer who is calling the function
/// @param _approverId the index of the approver who is being changed
/// @param _approver the address of the new approver
function changeApprover(
address _sender,
uint _jobId,
uint _issuerId,
uint _approverId,
address payable _approver)
external
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
onlyIssuer(_sender, _jobId, _issuerId)
validateApproverArrayIndex(_jobId, _approverId)
{
jobs[_jobId].approvers[_approverId] = _approver;
emit JobApproversUpdated(_jobId, _sender, jobs[_jobId].approvers);
}
/// @dev changeData(): Allows any of the issuers to change the data the job
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _issuerId the index of the issuer who is calling the function
/// @param _ipfsHash the new IPFS hash representing the JSON object storing the details of the job (see docs for schema details)
function changeData(
address _sender,
uint _jobId,
uint _issuerId,
string memory _ipfsHash)
public
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
validateIssuerArrayIndex(_jobId, _issuerId)
onlyIssuer(_sender, _jobId, _issuerId)
{
emit JobDataChanged(_jobId, _sender, _ipfsHash); // The new _ipfsHash is emitted within an event rather than being stored on-chain for minimized gas costs
}
/// @dev addIssuers(): Allows any of the issuers to add more issuers to the job
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _issuerId the index of the issuer who is calling the function
/// @param _issuers the array of addresses to add to the list of valid issuers
function addIssuers(
address _sender,
uint _jobId,
uint _issuerId,
address payable[] memory _issuers)
public
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
validateIssuerArrayIndex(_jobId, _issuerId)
onlyIssuer(_sender, _jobId, _issuerId)
{
for (uint i = 0; i < _issuers.length; i++){
jobs[_jobId].issuers.push(_issuers[i]);
}
emit JobIssuersUpdated(_jobId, _sender, jobs[_jobId].issuers);
}
/// @dev replaceIssuers(): Allows any of the issuers to replace the issuers of the job
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _issuerId the index of the issuer who is calling the function
/// @param _issuers the array of addresses to replace the list of valid issuers
function replaceIssuers(
address _sender,
uint _jobId,
uint _issuerId,
address payable[] memory _issuers)
public
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
validateIssuerArrayIndex(_jobId, _issuerId)
onlyIssuer(_sender, _jobId, _issuerId)
{
require(_issuers.length > 0 || jobs[_jobId].approvers.length > 0); // Ensures there's at least 1 issuer or approver, so funds don't get stuck
jobs[_jobId].issuers = _issuers;
emit JobIssuersUpdated(_jobId, _sender, jobs[_jobId].issuers);
}
/// @dev addApprovers(): Allows any of the issuers to add more approvers to the job
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _issuerId the index of the issuer who is calling the function
/// @param _approvers the array of addresses to add to the list of valid approvers
function addApprovers(
address _sender,
uint _jobId,
uint _issuerId,
address[] memory _approvers)
public
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
validateIssuerArrayIndex(_jobId, _issuerId)
onlyIssuer(_sender, _jobId, _issuerId)
{
for (uint i = 0; i < _approvers.length; i++){
jobs[_jobId].approvers.push(_approvers[i]);
}
emit JobApproversUpdated(_jobId, _sender, jobs[_jobId].approvers);
}
/// @dev replaceApprovers(): Allows any of the issuers to replace the approvers of the job
/// @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer)
/// @param _jobId the index of the job
/// @param _issuerId the index of the issuer who is calling the function
/// @param _approvers the array of addresses to replace the list of valid approvers
function replaceApprovers(
address _sender,
uint _jobId,
uint _issuerId,
address[] memory _approvers)
public
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
validateIssuerArrayIndex(_jobId, _issuerId)
onlyIssuer(_sender, _jobId, _issuerId)
{
require(jobs[_jobId].issuers.length > 0 || _approvers.length > 0); // Ensures there's at least 1 issuer or approver, so funds don't get stuck
jobs[_jobId].approvers = _approvers;
emit JobApproversUpdated(_jobId, _sender, jobs[_jobId].approvers);
}
/// @dev getJob(): Returns the details of the job
/// @param _jobId the index of the job
/// @return Returns a tuple for the job
function getJob(uint _jobId)
external
view
returns (Job memory)
{
return jobs[_jobId];
}
function transferTokens(uint _jobId, address payable _to, uint _amount)
internal
{
if (jobs[_jobId].tokenVersion == 0){
require(_amount > 0); // Sending 0 tokens should throw
require(jobs[_jobId].balance >= _amount);
jobs[_jobId].balance = jobs[_jobId].balance.sub(_amount);
_to.transfer(_amount);
} else if (jobs[_jobId].tokenVersion == 20){
require(_amount > 0); // Sending 0 tokens should throw
require(jobs[_jobId].balance >= _amount);
jobs[_jobId].balance = jobs[_jobId].balance.sub(_amount);
require(IERC20(jobs[_jobId].token).transfer(_to, _amount));
} else if (jobs[_jobId].tokenVersion == 721){
require(tokenBalances[_jobId][_amount]);
tokenBalances[_jobId][_amount] = false; // Removes the 721 token from the balance of the job
IERC721(jobs[_jobId].token).transferFrom(address(this),
_to,
_amount);
} else {
revert();
}
}
/*
* Events
*/
event JobIssued(uint _jobId, address payable _creator, address payable[] _issuers, address[] _approvers, string _ipfsHash, address _token, uint _tokenVersion);
event ContributionAdded(uint _jobId, uint _contributionId, address payable _contributor, uint _amount);
event ContributionRefunded(uint _jobId, uint _contributionId);
event ContributionsRefunded(uint _jobId, address _issuer, uint[] _contributionIds);
event JobDrained(uint _jobId, address _issuer, uint[] _amounts);
event JobInvoice(uint _jobId, uint _invoiceId, address payable _invoiceIssuer, string _ipfsHash, address _submitter, uint _amount);
event InvoiceAccepted(uint _jobId, uint _invoiceId, address _approver, uint _amount);
event JobChanged(uint _jobId, address _changer, address payable[] _issuers, address payable[] _approvers, string _ipfsHash);
event JobIssuersUpdated(uint _jobId, address _changer, address payable[] _issuers);
event JobApproversUpdated(uint _jobId, address _changer, address[] _approvers);
event JobDataChanged(uint _jobId, address _changer, string _ipfsHash);
event CandidateAccepted(uint _jobId, address _candidate);
event InvoiceCancelled(address _sender, uint _jobId, uint _invoiceId);
}
| @dev cancelInvoice(): Allows the sender of the invoice to cancel it @param _sender the sender of the transaction issuing the job (should be the same as msg.sender unless the txn is called by the meta tx relayer) @param _jobId the index of the job @param _invoiceId the index of the invoice to be accepted | function cancelInvoice(
address _sender,
uint _jobId,
uint _invoiceId
)
public
senderIsValid(_sender)
validateJobArrayIndex(_jobId)
validateInvoiceArrayIndex(_jobId, _invoiceId)
{
Invoice storage invoice=jobs[_jobId].invoices[_invoiceId];
if(invoice.submitter != _sender){
revert("Only the original invoice sender can cancel it.");
}
invoice.cancelled=true;
emit InvoiceCancelled(_sender, _jobId, _invoiceId);
}
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pragma solidity 0.4.18;
/// @author Pablo Ruiz - 2017 - [email protected]
/// @title MilestoneVault - A vault to store funds received during a token sale.
/// Funds are released in milestones, approved by the original contributors
//
// Permissions
//
// crowdsale contract admin contributor
// Constructor x
// Deposit x
// Close x
// Withdraw funds x
// Request funds x
// Vote against x
// Refund contributions x
contract MilestoneVault {
using SafeMath for uint256;
// The crowdsale that created the vault -> The only address allowed to forward funds to the vault
address public crowdsale;
// The account responsible for requesting funds and withdrawing them
address public admin;
// The address where funds will be transferred when a milestone is reached
address public wallet;
// How much ether gets transferred to wallet when milestone is reached.
// Accepts any number of milestones which must sum 100%
// For example: [30,40,20,10] -> Milestone 1 gives 30% of the funds raised,
// milestone 2 40%, milestone 3 20% and milestone 4 10%.
uint8[] public milestones;
// Which milestone is being processed
uint public currentMilestone;
// How many attempts the current milestone has had.
uint public currentRejectRetry = 0;
// Funds deposited by each contributor. Used to weight votes and refund on project failure.
mapping (address => uint256) public deposited;
// Total funds collected by the vault during the crowdsale
uint public totalFunds;
// Total funds withdrawn by the owner after each milestone is reached
uint public fundsWithdrawn;
enum State { Fundraising, Closed, Voting, WithdrawalRejected, ProjectCancelled}
State public state;
// Marks when the voting period started upon funds request by owner
uint public votingStartTime;
// Marks the end of the voting period. No votes can be submitted afterwards
uint public votingEndTime;
// total votes (weighted by contribution) the current request for withdrawal has
uint public votesAgainstWithdrawal;
// Stores whether or not a contributor has voted in the current Milestone -> Retry
mapping (address => mapping (uint => mapping (uint => bool))) public voteCast;
//
// CONSTANTS
// The following constants control the timing of the withdrawal requests
//
// How much time has to pass for the admin to request funds again after a failed attempt
uint constant WITHDRAWAL_RETRY_TIME = 10 days;
// The duration of each voting period.
uint constant VOTING_TIME = 5 days;
// If the crowdsale team tries to withdraw many times and the investors reject it, then
// we deem the project a failure. Investors can get a refund on funds not yet withdrawn by admin.
// They would also keep their tokens, but at this point it wouldn't matter, I guess.
uint constant MAX_RETRY_ATTEMPTS = 3;
modifier onlyAdmin {
require(msg.sender == admin);
_;
}
modifier onlyCrowdsale {
require(msg.sender == crowdsale);
_;
}
//
// Events
//
event Closed();
event E_FundsRequested(uint _requested, uint _votingStartTime, uint _votingEndTime);
event E_RejectedWithdrawal(uint _votesAgainstWithdrawal,uint _totalFunds);
event E_FundsWithdrawn(uint _milestone,uint _fundsWithdrawn);
event E_ProjectCancelled(uint _cancellationTime, uint _rejectRetry, uint _rejectMilestone);
event E_RefundedContribution(uint refundDate, uint _refunded);
event E_Closed();
/// @dev contract constructor. Called by crowdsale contract
/// @param _admin The administrator of the vault. Responsible for requesting withdrawals
/// @param _wallet The address where the funds withdrawn by admin will be forwarded to
/// @param _milestones An array with the percentaje (uint values) to be withdrawn at each milestone
function MilestoneVault(address _admin,address _wallet, uint8[] _milestones) public {
require(_wallet != address(0));
require(_admin != address(0));
require(_milestones.length >0);
uint8 _milestonesSum = 0;
for(uint8 i; i<_milestones.length;i++){
_milestonesSum += _milestones[i];
}
require(_milestonesSum == 100);
wallet = _wallet;
crowdsale = msg.sender;
admin = _admin;
milestones = _milestones;
state = State.Fundraising;
}
/// @dev Crowdsale contract should forward funds here instead of to their wallet
/// Funds are secured here while the admin has access as milestones are reached.
/// Typically called like this from the crowdsale milestoneVault.deposit.value(msg.value)(msg.sender);
/// @param _contributor The address of the contributor who bought tokens on the crowdsale
function deposit(address _contributor) public onlyCrowdsale payable {
require(state == State.Fundraising);
deposited[_contributor] = deposited[_contributor].add(msg.value);
totalFunds = totalFunds.add(msg.value);
}
/// @dev Crowdsale contract should call this function when the crowdsale successfully ends
/// No more funds may be received afterwards. Admin can start requesting funds afterwards.
function close() onlyCrowdsale public {
require(state == State.Fundraising);
require(totalFunds > 0);
state = State.Closed;
E_Closed();
}
/// @dev Withdraw funds for the current milestone (only if contributors did not reject it)
function withdrawFunds() public onlyAdmin {
require(currentMilestone < milestones.length); // Make sure we haven't already gone through all milestones
// State equals voting when the owner has requested the funds and the voters
// have not yet rejected it.
require(state == State.Voting);
// We have to wait until the voting period has ended
require(now > votingEndTime);
uint allowedWithdrawal = milestones[currentMilestone]; // % to withdraw
uint fundsToWithdraw = totalFunds.mul(allowedWithdrawal).div(100);
require(fundsToWithdraw <= this.balance);
fundsWithdrawn = fundsWithdrawn.add(fundsToWithdraw); // Keep track of funds withdrawn so far
currentRejectRetry = 0; //Reset attempts at withdrawing funds for this milestone
currentMilestone++; // Move to the next milestone
state = State.Closed; // Back to the starting point ()
// transfer the funds to the wallet
wallet.transfer(fundsToWithdraw);
E_FundsWithdrawn(currentMilestone-1,fundsToWithdraw);
}
/// @dev initiate funds withdrawal request. Once this is called, voting period begins.
/// If contributors don't reject it, admin will be able to withdraw the funds after the voting period ends
function requestFunds() public onlyAdmin {
//Can request funds only if:
//1. Previous request was successful (or if it is the first time)
//2. OR previous request was rejected and enough time has passed since then
require(state == State.Closed ||
(state == State.WithdrawalRejected && now > votingEndTime + WITHDRAWAL_RETRY_TIME));
// Reset voting variables
votesAgainstWithdrawal = 0;
votingStartTime = now;
votingEndTime = now + VOTING_TIME;
// Move to voting state
state = State.Voting;
uint requested = totalFunds.mul(milestones[currentMilestone]).div(100);
E_FundsRequested(requested, votingStartTime,votingEndTime);
}
/// @dev contributors should call this function in order to cast their vote.
/// Votes are weighted by the contribution size.
/// If more than half votes are received, the request is rejected.
/// If there are several rejections on the same milestone, we deem the project cancelled
function voteAgainstFundsWithdrawal() public {
require(state == State.Voting);
require(now < votingEndTime);
require(!voteCast[msg.sender][currentMilestone][currentRejectRetry]); // Make sure no person votes twice
require(deposited[msg.sender]>0);
//Votes are weighted, based on the contribution made by the voter
votesAgainstWithdrawal = votesAgainstWithdrawal.add(deposited[msg.sender]);
voteCast[msg.sender][currentMilestone][currentRejectRetry] = true;
//If 51% voted against, the withdrawal is rejected
if(votesAgainstWithdrawal > totalFunds.div(2)){
state = State.WithdrawalRejected;
votingEndTime = now; // No need to keep waiting if request has already been rejected
currentRejectRetry++; // Now we have another attempt at withdrawing
E_RejectedWithdrawal(votesAgainstWithdrawal,totalFunds);
// If during the same milestone, the contributors reject requests past the max,
// cancel project and allow refunds
if(currentRejectRetry >= MAX_RETRY_ATTEMPTS){
state = State.ProjectCancelled;
E_ProjectCancelled(now,currentRejectRetry, currentMilestone);
}
}
}
/// @dev Allow contributors to get a refund on funds not yet withdrawn.
/// Only available if the project has been cancelled by repeat failed requests.
function refundContributions() public {
require(state == State.ProjectCancelled);
require(deposited[msg.sender] > 0);
// Calculated how much the contributor is entitled to based on
// what he contributed from the total, minus what the admin already withdrawn
uint remainingFunds = totalFunds.sub(fundsWithdrawn);
uint funds = remainingFunds.mul(deposited[msg.sender]).div(totalFunds);
require (funds <= this.balance);
deposited[msg.sender] = 0;
// Transfer the funds to the contributor
msg.sender.transfer(funds);
E_RefundedContribution(now, funds);
}
function getBalance() view public returns (uint) {
return this.balance;
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
| @dev contract constructor. Called by crowdsale contract @param _admin The administrator of the vault. Responsible for requesting withdrawals @param _wallet The address where the funds withdrawn by admin will be forwarded to @param _milestones An array with the percentaje (uint values) to be withdrawn at each milestone | function MilestoneVault(address _admin,address _wallet, uint8[] _milestones) public {
require(_wallet != address(0));
require(_admin != address(0));
require(_milestones.length >0);
uint8 _milestonesSum = 0;
for(uint8 i; i<_milestones.length;i++){
_milestonesSum += _milestones[i];
}
require(_milestonesSum == 100);
wallet = _wallet;
crowdsale = msg.sender;
admin = _admin;
milestones = _milestones;
state = State.Fundraising;
}
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] |
pragma solidity 0.5.17; // optimization runs: 200, evm version: istanbul
interface DharmaTradeReserveV9Interface {
event ROLEMODIFIED858(Role indexed role, address account); //inject NONSTANDARD NAMING
event ROLEPAUSED516(Role indexed role); //inject NONSTANDARD NAMING
event ROLEUNPAUSED425(Role indexed role); //inject NONSTANDARD NAMING
event ETHERRECEIVED855(address sender, uint256 amount); //inject NONSTANDARD NAMING
enum Role { // #
DEPOSIT_MANAGER, // 0
ADJUSTER, // 1
WITHDRAWAL_MANAGER, // 2
RESERVE_TRADER, // 3
PAUSER // 4
}
struct RoleStatus {
address account;
bool paused;
}
function TRADEDAIFORETHER899( //inject NONSTANDARD NAMING
uint256 daiAmount, uint256 quotedEtherAmount, uint256 deadline
) external returns (uint256 totalDaiSold);
function TRADEDAIFORETHERV2950( //inject NONSTANDARD NAMING
uint256 daiAmount, uint256 quotedEtherAmount, uint256 deadline
) external returns (uint256 totalDaiSold);
function TRADEETHERFORDAI795( //inject NONSTANDARD NAMING
uint256 quotedDaiAmount, uint256 deadline
) external payable returns (uint256 totalDaiBought);
function TRADEETHERFORDAIV2625( //inject NONSTANDARD NAMING
uint256 quotedDaiAmount, uint256 deadline
) external payable returns (uint256 totalDaiBought);
function TRADEDAIFORTOKEN107( //inject NONSTANDARD NAMING
address token, uint256 daiAmount, uint256 quotedTokenAmount, uint256 deadline, bool routeThroughEther
) external returns (uint256 totalDaiSold);
function TRADETOKENFORDAI864( //inject NONSTANDARD NAMING
ERC20Interface token, uint256 tokenAmount, uint256 quotedDaiAmount, uint256 deadline, bool routeThroughEther
) external returns (uint256 totalDaiBought);
function TRADETOKENFORETHER84( //inject NONSTANDARD NAMING
ERC20Interface token, uint256 tokenAmount, uint256 quotedEtherAmount, uint256 deadline
) external returns (uint256 totalEtherBought);
function TRADEETHERFORTOKEN818( //inject NONSTANDARD NAMING
address token, uint256 quotedTokenAmount, uint256 deadline
) external payable returns (uint256 totalEtherSold);
function TRADEETHERFORTOKENUSINGETHERIZER867( //inject NONSTANDARD NAMING
address token, uint256 etherAmount, uint256 quotedTokenAmount, uint256 deadline
) external returns (uint256 totalEtherSold);
function TRADEDAIFORETHERUSINGRESERVES556( //inject NONSTANDARD NAMING
uint256 daiAmountFromReserves, uint256 quotedEtherAmount, uint256 deadline
) external returns (uint256 totalDaiSold);
function TRADEDAIFORETHERUSINGRESERVESV2121( //inject NONSTANDARD NAMING
uint256 daiAmountFromReserves, uint256 quotedEtherAmount, uint256 deadline
) external returns (uint256 totalDaiSold);
function TRADEETHERFORDAIUSINGRESERVESANDMINTDDAI322( //inject NONSTANDARD NAMING
uint256 etherAmountFromReserves, uint256 quotedDaiAmount, uint256 deadline
) external returns (uint256 totalDaiBought, uint256 totalDDaiMinted);
function TRADEETHERFORDAIUSINGRESERVESANDMINTDDAIV298( //inject NONSTANDARD NAMING
uint256 etherAmountFromReserves, uint256 quotedDaiAmount, uint256 deadline
) external returns (uint256 totalDaiBought, uint256 totalDDaiMinted);
function TRADEDAIFORTOKENUSINGRESERVES528( //inject NONSTANDARD NAMING
address token, uint256 daiAmountFromReserves, uint256 quotedTokenAmount, uint256 deadline, bool routeThroughEther
) external returns (uint256 totalDaiSold);
function TRADETOKENFORDAIUSINGRESERVESANDMINTDDAI549( //inject NONSTANDARD NAMING
ERC20Interface token, uint256 tokenAmountFromReserves, uint256 quotedDaiAmount, uint256 deadline, bool routeThroughEther
) external returns (uint256 totalDaiBought, uint256 totalDDaiMinted);
function TRADETOKENFORETHERUSINGRESERVES915( //inject NONSTANDARD NAMING
ERC20Interface token, uint256 tokenAmountFromReserves, uint256 quotedEtherAmount, uint256 deadline
) external returns (uint256 totalEtherBought);
function TRADEETHERFORTOKENUSINGRESERVES405( //inject NONSTANDARD NAMING
address token, uint256 etherAmountFromReserves, uint256 quotedTokenAmount, uint256 deadline
) external returns (uint256 totalEtherSold);
function FINALIZEETHERDEPOSIT298( //inject NONSTANDARD NAMING
address payable smartWallet,
address initialUserSigningKey,
uint256 etherAmount
) external;
function FINALIZEDAIDEPOSIT931( //inject NONSTANDARD NAMING
address smartWallet, address initialUserSigningKey, uint256 daiAmount
) external;
function FINALIZEDHARMADAIDEPOSIT237( //inject NONSTANDARD NAMING
address smartWallet, address initialUserSigningKey, uint256 dDaiAmount
) external;
function MINT835(uint256 daiAmount) external returns (uint256 dDaiMinted); //inject NONSTANDARD NAMING
function REDEEM834(uint256 dDaiAmount) external returns (uint256 daiReceived); //inject NONSTANDARD NAMING
function TRADEDDAIFORUSDC353( //inject NONSTANDARD NAMING
uint256 daiEquivalentAmount, uint256 quotedUSDCAmount
) external returns (uint256 usdcReceived);
function TRADEUSDCFORDDAI141( //inject NONSTANDARD NAMING
uint256 usdcAmount, uint256 quotedDaiEquivalentAmount
) external returns (uint256 dDaiMinted);
function WITHDRAWUSDC678(address recipient, uint256 usdcAmount) external; //inject NONSTANDARD NAMING
function WITHDRAWDAI49(address recipient, uint256 daiAmount) external; //inject NONSTANDARD NAMING
function WITHDRAWDHARMADAI777(address recipient, uint256 dDaiAmount) external; //inject NONSTANDARD NAMING
function WITHDRAWUSDCTOPRIMARYRECIPIENT422(uint256 usdcAmount) external; //inject NONSTANDARD NAMING
function WITHDRAWDAITOPRIMARYRECIPIENT762(uint256 usdcAmount) external; //inject NONSTANDARD NAMING
function WITHDRAWETHER204( //inject NONSTANDARD NAMING
address payable recipient, uint256 etherAmount
) external;
function WITHDRAW439( //inject NONSTANDARD NAMING
ERC20Interface token, address recipient, uint256 amount
) external returns (bool success);
function CALLANY778( //inject NONSTANDARD NAMING
address payable target, uint256 amount, bytes calldata data
) external returns (bool ok, bytes memory returnData);
function SETDAILIMIT345(uint256 daiAmount) external; //inject NONSTANDARD NAMING
function SETETHERLIMIT550(uint256 daiAmount) external; //inject NONSTANDARD NAMING
function SETPRIMARYUSDCRECIPIENT259(address recipient) external; //inject NONSTANDARD NAMING
function SETPRIMARYDAIRECIPIENT972(address recipient) external; //inject NONSTANDARD NAMING
function SETROLE712(Role role, address account) external; //inject NONSTANDARD NAMING
function REMOVEROLE29(Role role) external; //inject NONSTANDARD NAMING
function PAUSE504(Role role) external; //inject NONSTANDARD NAMING
function UNPAUSE768(Role role) external; //inject NONSTANDARD NAMING
function ISPAUSED423(Role role) external view returns (bool paused); //inject NONSTANDARD NAMING
function ISROLE511(Role role) external view returns (bool hasRole); //inject NONSTANDARD NAMING
function ISDHARMASMARTWALLET695( //inject NONSTANDARD NAMING
address smartWallet, address initialUserSigningKey
) external view returns (bool dharmaSmartWallet);
function GETDEPOSITMANAGER250() external view returns (address depositManager); //inject NONSTANDARD NAMING
function GETADJUSTER715() external view returns (address adjuster); //inject NONSTANDARD NAMING
function GETRESERVETRADER735() external view returns (address reserveTrader); //inject NONSTANDARD NAMING
function GETWITHDRAWALMANAGER7() external view returns (address withdrawalManager); //inject NONSTANDARD NAMING
function GETPAUSER73() external view returns (address pauser); //inject NONSTANDARD NAMING
function GETRESERVES254() external view returns ( //inject NONSTANDARD NAMING
uint256 dai, uint256 dDai, uint256 dDaiUnderlying
);
function GETDAILIMIT529() external view returns ( //inject NONSTANDARD NAMING
uint256 daiAmount, uint256 dDaiAmount
);
function GETETHERLIMIT792() external view returns (uint256 etherAmount); //inject NONSTANDARD NAMING
function GETPRIMARYUSDCRECIPIENT771() external view returns ( //inject NONSTANDARD NAMING
address recipient
);
function GETPRIMARYDAIRECIPIENT209() external view returns ( //inject NONSTANDARD NAMING
address recipient
);
function GETIMPLEMENTATION393() external view returns (address implementation); //inject NONSTANDARD NAMING
function GETVERSION945() external view returns (uint256 version); //inject NONSTANDARD NAMING
}
interface ERC20Interface {
function BALANCEOF395(address) external view returns (uint256); //inject NONSTANDARD NAMING
function APPROVE301(address, uint256) external returns (bool); //inject NONSTANDARD NAMING
function ALLOWANCE335(address, address) external view returns (uint256); //inject NONSTANDARD NAMING
function TRANSFER424(address, uint256) external returns (bool); //inject NONSTANDARD NAMING
function TRANSFERFROM59(address, address, uint256) external returns (bool); //inject NONSTANDARD NAMING
}
interface DTokenInterface {
function MINT835(uint256 underlyingToSupply) external returns (uint256 dTokensMinted); //inject NONSTANDARD NAMING
function REDEEM834(uint256 dTokensToBurn) external returns (uint256 underlyingReceived); //inject NONSTANDARD NAMING
function REDEEMUNDERLYING110(uint256 underlyingToReceive) external returns (uint256 dTokensBurned); //inject NONSTANDARD NAMING
function BALANCEOF395(address) external view returns (uint256); //inject NONSTANDARD NAMING
function BALANCEOFUNDERLYING111(address) external view returns (uint256); //inject NONSTANDARD NAMING
function TRANSFER424(address, uint256) external returns (bool); //inject NONSTANDARD NAMING
function APPROVE301(address, uint256) external returns (bool); //inject NONSTANDARD NAMING
function EXCHANGERATECURRENT826() external view returns (uint256); //inject NONSTANDARD NAMING
}
interface TradeHelperInterface {
function TRADEUSDCFORDDAI141(uint256 amountUSDC, uint256 quotedDaiEquivalentAmount) external returns (uint256 dDaiMinted); //inject NONSTANDARD NAMING
function TRADEDDAIFORUSDC353(uint256 amountDai, uint256 quotedUSDCAmount) external returns (uint256 usdcReceived); //inject NONSTANDARD NAMING
function GETEXPECTEDDAI468(uint256 usdc) external view returns (uint256 dai); //inject NONSTANDARD NAMING
function GETEXPECTEDUSDC440(uint256 dai) external view returns (uint256 usdc); //inject NONSTANDARD NAMING
}
interface UniswapV1Interface {
function ETHTOTOKENSWAPINPUT251( //inject NONSTANDARD NAMING
uint256 minTokens, uint256 deadline
) external payable returns (uint256 tokensBought);
function TOKENTOETHTRANSFEROUTPUT929( //inject NONSTANDARD NAMING
uint256 ethBought, uint256 maxTokens, uint256 deadline, address recipient
) external returns (uint256 tokensSold);
}
interface UniswapV2Interface {
function SWAPTOKENSFOREXACTTOKENS91( //inject NONSTANDARD NAMING
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function SWAPEXACTTOKENSFORTOKENS457( //inject NONSTANDARD NAMING
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function SWAPEXACTTOKENSFORETH769( //inject NONSTANDARD NAMING
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function SWAPTOKENSFOREXACTETH731( //inject NONSTANDARD NAMING
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function SWAPETHFOREXACTTOKENS5( //inject NONSTANDARD NAMING
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function SWAPEXACTETHFORTOKENS903( //inject NONSTANDARD NAMING
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
}
interface EtherReceiverInterface {
function SETTLEETHER955() external; //inject NONSTANDARD NAMING
}
library SafeMath {
function ADD510(uint256 a, uint256 b) internal pure returns (uint256 c) { //inject NONSTANDARD NAMING
c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function MUL1(uint256 a, uint256 b) internal pure returns (uint256) { //inject NONSTANDARD NAMING
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function DIV802(uint256 a, uint256 b) internal pure returns (uint256) { //inject NONSTANDARD NAMING
require(b > 0, "SafeMath: division by zero");
return a / b;
}
}
contract TwoStepOwnable {
event OWNERSHIPTRANSFERRED461( //inject NONSTANDARD NAMING
address indexed previousOwner,
address indexed newOwner
);
address private _owner;
address private _newPotentialOwner;
function TRANSFEROWNERSHIP1000(address newOwner) external ONLYOWNER389 { //inject NONSTANDARD NAMING
require(
newOwner != address(0),
"TwoStepOwnable: new potential owner is the zero address."
);
_newPotentialOwner = newOwner;
}
function CANCELOWNERSHIPTRANSFER705() external ONLYOWNER389 { //inject NONSTANDARD NAMING
delete _newPotentialOwner;
}
function ACCEPTOWNERSHIP63() external { //inject NONSTANDARD NAMING
require(
msg.sender == _newPotentialOwner,
"TwoStepOwnable: current owner must set caller as new potential owner."
);
delete _newPotentialOwner;
emit OWNERSHIPTRANSFERRED461(_owner, msg.sender);
_owner = msg.sender;
}
function OWNER109() external view returns (address) { //inject NONSTANDARD NAMING
return _owner;
}
function ISOWNER823() public view returns (bool) { //inject NONSTANDARD NAMING
return msg.sender == _owner;
}
modifier ONLYOWNER389() { //inject NONSTANDARD NAMING
require(ISOWNER823(), "TwoStepOwnable: caller is not the owner.");
_;
}
}
contract DharmaTradeReserveV9ImplementationStaging is DharmaTradeReserveV9Interface, TwoStepOwnable {
using SafeMath for uint256;
// Maintain a role status mapping with assigned accounts and paused states.
mapping(uint256 => RoleStatus) private _roles;
// Maintain a "primary recipient" the withdrawal manager can transfer Dai to.
address private _primaryDaiRecipient;
// Maintain a "primary recipient" the withdrawal manager can transfer USDC to.
address private _primaryUSDCRecipient;
// Maintain a maximum allowable transfer size (in Dai) for the deposit manager.
uint256 private _daiLimit;
// Maintain a maximum allowable transfer size (in Ether) for the deposit manager.
uint256 private _etherLimit;
bool private _originatesFromReserveTrader; // unused, don't change storage layout
uint256 private constant _version934 = 8; //inject NONSTANDARD NAMING
// This contract interacts with USDC, Dai, and Dharma Dai.
ERC20Interface internal constant _usdc172 = ERC20Interface( //inject NONSTANDARD NAMING
0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 // mainnet
);
ERC20Interface internal constant _dai939 = ERC20Interface( //inject NONSTANDARD NAMING
0x6B175474E89094C44Da98b954EedeAC495271d0F // mainnet
);
ERC20Interface internal constant _etherizer566 = ERC20Interface( //inject NONSTANDARD NAMING
0x723B51b72Ae89A3d0c2a2760f0458307a1Baa191
);
DTokenInterface internal constant _ddai325 = DTokenInterface( //inject NONSTANDARD NAMING
0x00000000001876eB1444c986fD502e618c587430
);
TradeHelperInterface internal constant _trade_helper648 = TradeHelperInterface( //inject NONSTANDARD NAMING
0x9328F2Fb3e85A4d24Adc2f68F82737183e85691d
);
UniswapV1Interface internal constant _uniswap_dai496 = UniswapV1Interface( //inject NONSTANDARD NAMING
0x2a1530C4C41db0B0b2bB646CB5Eb1A67b7158667
);
UniswapV2Interface internal constant _uniswap_router877 = UniswapV2Interface( //inject NONSTANDARD NAMING
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
);
EtherReceiverInterface internal constant _eth_receiver459 = EtherReceiverInterface( //inject NONSTANDARD NAMING
0xaf84687D21736F5E06f738c6F065e88890465E7c
);
address internal constant _weth740 = address( //inject NONSTANDARD NAMING
0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
);
// The "Create2 Header" is used to compute smart wallet deployment addresses.
bytes21 internal constant _create2_header376 = bytes21( //inject NONSTANDARD NAMING
0xff8D1e00b000e56d5BcB006F3a008Ca6003b9F0033 // control character + factory
);
// The "Wallet creation code" header & footer are also used to derive wallets.
bytes internal constant _wallet_creation_code_header138 = hex"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"; //inject NONSTANDARD NAMING
bytes28 internal constant _wallet_creation_code_footer303 = bytes28( //inject NONSTANDARD NAMING
0x00000000000000000000000000000000000000000000000000000000
);
// Include a payable fallback so that the contract can receive Ether payments.
function () external payable {
emit ETHERRECEIVED855(msg.sender, msg.value);
}
function INITIALIZE669() external { //inject NONSTANDARD NAMING
// Approve Uniswap router to transfer Dai on behalf of this contract.
if (_dai939.ALLOWANCE335(address(this), address(_uniswap_router877)) != uint256(-1)) {
bool ok = _dai939.APPROVE301(address(_uniswap_router877), uint256(-1));
require(ok, "Dai approval for Uniswap router failed.");
}
}
function TRADEDAIFORETHER899( //inject NONSTANDARD NAMING
uint256 daiAmount,
uint256 quotedEtherAmount,
uint256 deadline
) external returns (uint256 totalDaiSold) {
// Transfer the Dai from the caller and revert on failure.
_TRANSFERINTOKEN213(_dai939, msg.sender, daiAmount);
// Trade the Dai for the quoted Ether amount on Uniswap and send to caller.
totalDaiSold = _uniswap_dai496.TOKENTOETHTRANSFEROUTPUT929(
quotedEtherAmount, daiAmount, deadline, msg.sender
);
}
function TRADEDAIFORETHERV2950( //inject NONSTANDARD NAMING
uint256 daiAmount,
uint256 quotedEtherAmount,
uint256 deadline
) external returns (uint256 totalDaiSold) {
// Transfer the Dai from the caller and revert on failure.
_TRANSFERINTOKEN213(_dai939, msg.sender, daiAmount);
// Establish path from Dai to Ether.
(address[] memory path, uint256[] memory amounts) = _CREATEPATHANDAMOUNTS796(
address(_dai939), _weth740, false
);
// Trade Dai for quoted Ether amount on Uniswap (send to the caller).
amounts = _uniswap_router877.SWAPTOKENSFOREXACTETH731(
quotedEtherAmount, daiAmount, path, msg.sender, deadline
);
totalDaiSold = amounts[0];
}
function TRADETOKENFORETHER84( //inject NONSTANDARD NAMING
ERC20Interface token, uint256 tokenAmount, uint256 quotedEtherAmount, uint256 deadline
) external returns (uint256 totalEtherBought) {
// Transfer the tokens from the caller and revert on failure.
_TRANSFERINTOKEN213(token, msg.sender, tokenAmount);
// Approve Uniswap router to transfer tokens on behalf of this contract.
_GRANTUNISWAPROUTERAPPROVALIFNECESSARY324(token);
// Establish path from target token to Ether.
(address[] memory path, uint256[] memory amounts) = _CREATEPATHANDAMOUNTS796(
address(token), _weth740, false
);
// Trade tokens for quoted Ether amount on Uniswap (send to this contract).
amounts = _uniswap_router877.SWAPEXACTTOKENSFORETH769(
tokenAmount, quotedEtherAmount, path, address(this), deadline
);
totalEtherBought = amounts[1];
// Send quoted Ether amount to caller and revert with reason on failure.
(bool ok, ) = msg.sender.call.value(quotedEtherAmount)("");
if (!ok) {
assembly {
returndatacopy(0, 0, returndatasize)
revert(0, returndatasize)
}
}
}
function TRADEDAIFORTOKEN107( //inject NONSTANDARD NAMING
address token, uint256 daiAmount, uint256 quotedTokenAmount, uint256 deadline, bool routeThroughEther
) external returns (uint256 totalDaiSold) {
// Transfer the Dai from the caller and revert on failure.
_TRANSFERINTOKEN213(_dai939, msg.sender, daiAmount);
// Establish path (direct or routed through Ether) from Dai to target token.
(address[] memory path, uint256[] memory amounts) = _CREATEPATHANDAMOUNTS796(
address(_dai939), token, routeThroughEther
);
// Trade the Dai for the quoted token amount on Uniswap and send to caller.
amounts = _uniswap_router877.SWAPTOKENSFOREXACTTOKENS91(
quotedTokenAmount, daiAmount, path, msg.sender, deadline
);
totalDaiSold = amounts[0];
}
function TRADEDAIFORETHERUSINGRESERVES556( //inject NONSTANDARD NAMING
uint256 daiAmountFromReserves, uint256 quotedEtherAmount, uint256 deadline
) external ONLYOWNEROR665(Role.RESERVE_TRADER) returns (uint256 totalDaiSold) {
// Redeem dDai if the current Dai balance is less than is required.
uint256 daiBalance = _dai939.BALANCEOF395(address(this));
if (daiBalance < daiAmountFromReserves) {
uint256 additionalDaiRequired = daiAmountFromReserves - daiBalance;
_ddai325.REDEEMUNDERLYING110(additionalDaiRequired);
}
// Trade the Dai for the quoted Ether amount on Uniswap.
totalDaiSold = _uniswap_dai496.TOKENTOETHTRANSFEROUTPUT929(
quotedEtherAmount,
daiAmountFromReserves,
deadline,
address(_eth_receiver459)
);
// Move the Ether from the receiver to this contract (gas workaround).
_eth_receiver459.SETTLEETHER955();
}
function TRADEDAIFORETHERUSINGRESERVESV2121( //inject NONSTANDARD NAMING
uint256 daiAmountFromReserves, uint256 quotedEtherAmount, uint256 deadline
) external ONLYOWNEROR665(Role.RESERVE_TRADER) returns (uint256 totalDaiSold) {
// Redeem dDai if the current Dai balance is less than is required.
uint256 daiBalance = _dai939.BALANCEOF395(address(this));
if (daiBalance < daiAmountFromReserves) {
uint256 additionalDaiRequired = daiAmountFromReserves - daiBalance;
_ddai325.REDEEMUNDERLYING110(additionalDaiRequired);
}
// Establish path from Dai to Ether.
(address[] memory path, uint256[] memory amounts) = _CREATEPATHANDAMOUNTS796(
address(_dai939), _weth740, false
);
// Trade Dai for quoted Ether amount on Uniswap (send to this contract).
amounts = _uniswap_router877.SWAPTOKENSFOREXACTETH731(
quotedEtherAmount, daiAmountFromReserves, path, address(this), deadline
);
totalDaiSold = amounts[0];
}
function TRADETOKENFORETHERUSINGRESERVES915( //inject NONSTANDARD NAMING
ERC20Interface token, uint256 tokenAmountFromReserves, uint256 quotedEtherAmount, uint256 deadline
) external ONLYOWNEROR665(Role.RESERVE_TRADER) returns (uint256 totalEtherBought) {
// Approve Uniswap router to transfer tokens on behalf of this contract.
_GRANTUNISWAPROUTERAPPROVALIFNECESSARY324(token);
// Establish path from target token to Ether.
(address[] memory path, uint256[] memory amounts) = _CREATEPATHANDAMOUNTS796(
address(token), _weth740, false
);
// Trade tokens for quoted Ether amount on Uniswap (send to this contract).
amounts = _uniswap_router877.SWAPEXACTTOKENSFORETH769(
tokenAmountFromReserves, quotedEtherAmount, path, address(this), deadline
);
totalEtherBought = amounts[1];
}
function TRADEETHERFORDAI795( //inject NONSTANDARD NAMING
uint256 quotedDaiAmount,
uint256 deadline
) external payable returns (uint256 totalDaiBought) {
// Trade the Ether for the quoted Dai amount on Uniswap.
totalDaiBought = _uniswap_dai496.ETHTOTOKENSWAPINPUT251.value(msg.value)(
quotedDaiAmount, deadline
);
// Transfer the Dai to the caller and revert on failure.
_TRANSFERTOKEN930(_dai939, msg.sender, quotedDaiAmount);
}
function TRADEETHERFORDAIV2625( //inject NONSTANDARD NAMING
uint256 quotedDaiAmount,
uint256 deadline
) external payable returns (uint256 totalDaiBought) {
// Establish path from Ether to Dai.
(address[] memory path, uint256[] memory amounts) = _CREATEPATHANDAMOUNTS796(
_weth740, address(_dai939), false
);
// Trade Ether for Dai on Uniswap (send to this contract).
amounts = _uniswap_router877.SWAPEXACTETHFORTOKENS903.value(msg.value)(
quotedDaiAmount, path, address(this), deadline
);
totalDaiBought = amounts[1];
// Transfer the Dai to the caller and revert on failure.
_TRANSFERTOKEN930(_dai939, msg.sender, quotedDaiAmount);
}
function TRADEETHERFORTOKEN818( //inject NONSTANDARD NAMING
address token, uint256 quotedTokenAmount, uint256 deadline
) external payable returns (uint256 totalEtherSold) {
// Establish path from Ether to target token.
(address[] memory path, uint256[] memory amounts) = _CREATEPATHANDAMOUNTS796(
_weth740, address(token), false
);
// Trade Ether for quoted token amount on Uniswap and send to caller.
amounts = _uniswap_router877.SWAPETHFOREXACTTOKENS5.value(msg.value)(
quotedTokenAmount, path, msg.sender, deadline
);
totalEtherSold = amounts[0];
}
function TRADEETHERFORTOKENUSINGETHERIZER867( //inject NONSTANDARD NAMING
address token, uint256 etherAmount, uint256 quotedTokenAmount, uint256 deadline
) external returns (uint256 totalEtherSold) {
// Transfer the Ether from the caller and revert on failure.
_TRANSFERINTOKEN213(_etherizer566, msg.sender, etherAmount);
// Establish path from Ether to target token.
(address[] memory path, uint256[] memory amounts) = _CREATEPATHANDAMOUNTS796(
_weth740, address(token), false
);
// Trade Ether for quoted token amount on Uniswap and send to caller.
amounts = _uniswap_router877.SWAPETHFOREXACTTOKENS5.value(etherAmount)(
quotedTokenAmount, path, msg.sender, deadline
);
totalEtherSold = amounts[0];
}
function TRADETOKENFORDAI864( //inject NONSTANDARD NAMING
ERC20Interface token, uint256 tokenAmount, uint256 quotedDaiAmount, uint256 deadline, bool routeThroughEther
) external returns (uint256 totalDaiBought) {
// Transfer the token from the caller and revert on failure.
_TRANSFERINTOKEN213(token, msg.sender, tokenAmount);
// Approve Uniswap router to transfer tokens on behalf of this contract.
_GRANTUNISWAPROUTERAPPROVALIFNECESSARY324(token);
// Establish path (direct or routed through Ether) from target token to Dai.
(address[] memory path, uint256[] memory amounts) = _CREATEPATHANDAMOUNTS796(
address(token), address(_dai939), routeThroughEther
);
// Trade the Dai for the quoted token amount on Uniswap and send to caller.
amounts = _uniswap_router877.SWAPEXACTTOKENSFORTOKENS457(
tokenAmount, quotedDaiAmount, path, msg.sender, deadline
);
totalDaiBought = amounts[path.length - 1];
// Transfer the Dai to the caller and revert on failure.
_TRANSFERTOKEN930(_dai939, msg.sender, quotedDaiAmount);
}
function TRADEETHERFORDAIUSINGRESERVESANDMINTDDAI322( //inject NONSTANDARD NAMING
uint256 etherAmountFromReserves, uint256 quotedDaiAmount, uint256 deadline
) external ONLYOWNEROR665(Role.RESERVE_TRADER) returns (
uint256 totalDaiBought, uint256 totalDDaiMinted
) {
// Trade the Ether for the quoted Dai amount on Uniswap.
totalDaiBought = _uniswap_dai496.ETHTOTOKENSWAPINPUT251.value(
etherAmountFromReserves
)(
quotedDaiAmount, deadline
);
// Mint dDai using the received Dai.
totalDDaiMinted = _ddai325.MINT835(totalDaiBought);
}
function TRADEETHERFORDAIUSINGRESERVESANDMINTDDAIV298( //inject NONSTANDARD NAMING
uint256 etherAmountFromReserves, uint256 quotedDaiAmount, uint256 deadline
) external ONLYOWNEROR665(Role.RESERVE_TRADER) returns (
uint256 totalDaiBought, uint256 totalDDaiMinted
) {
// Establish path from Ether to Dai.
(address[] memory path, uint256[] memory amounts) = _CREATEPATHANDAMOUNTS796(
_weth740, address(_dai939), false
);
// Trade Ether for Dai on Uniswap (send to this contract).
amounts = _uniswap_router877.SWAPEXACTETHFORTOKENS903.value(
etherAmountFromReserves
)(
quotedDaiAmount, path, address(this), deadline
);
totalDaiBought = amounts[1];
// Mint dDai using the received Dai.
totalDDaiMinted = _ddai325.MINT835(totalDaiBought);
}
function TRADEETHERFORTOKENUSINGRESERVES405( //inject NONSTANDARD NAMING
address token, uint256 etherAmountFromReserves, uint256 quotedTokenAmount, uint256 deadline
) external ONLYOWNEROR665(Role.RESERVE_TRADER) returns (uint256 totalEtherSold) {
// Establish path from Ether to target token.
(address[] memory path, uint256[] memory amounts) = _CREATEPATHANDAMOUNTS796(
_weth740, address(token), false
);
// Trade Ether for quoted token amount on Uniswap and send to this contract.
amounts = _uniswap_router877.SWAPETHFOREXACTTOKENS5.value(etherAmountFromReserves)(
quotedTokenAmount, path, address(this), deadline
);
totalEtherSold = amounts[0];
}
function TRADEDAIFORTOKENUSINGRESERVES528( //inject NONSTANDARD NAMING
address token, uint256 daiAmountFromReserves, uint256 quotedTokenAmount, uint256 deadline, bool routeThroughEther
) external ONLYOWNEROR665(Role.RESERVE_TRADER) returns (uint256 totalDaiSold) {
// Redeem dDai if the current Dai balance is less than is required.
uint256 daiBalance = _dai939.BALANCEOF395(address(this));
if (daiBalance < daiAmountFromReserves) {
uint256 additionalDaiRequired = daiAmountFromReserves - daiBalance;
_ddai325.REDEEMUNDERLYING110(additionalDaiRequired);
}
// Establish path (direct or routed through Ether) from Dai to target token.
(address[] memory path, uint256[] memory amounts) = _CREATEPATHANDAMOUNTS796(
address(_dai939), address(token), routeThroughEther
);
// Trade the Dai for the quoted token amount on Uniswap.
amounts = _uniswap_router877.SWAPTOKENSFOREXACTTOKENS91(
quotedTokenAmount, daiAmountFromReserves, path, address(this), deadline
);
totalDaiSold = amounts[0];
}
function TRADETOKENFORDAIUSINGRESERVESANDMINTDDAI549( //inject NONSTANDARD NAMING
ERC20Interface token, uint256 tokenAmountFromReserves, uint256 quotedDaiAmount, uint256 deadline, bool routeThroughEther
) external ONLYOWNEROR665(Role.RESERVE_TRADER) returns (
uint256 totalDaiBought, uint256 totalDDaiMinted
) {
// Approve Uniswap router to transfer tokens on behalf of this contract.
_GRANTUNISWAPROUTERAPPROVALIFNECESSARY324(token);
// Establish path (direct or routed through Ether) from target token to Dai.
(address[] memory path, uint256[] memory amounts) = _CREATEPATHANDAMOUNTS796(
address(token), address(_dai939), routeThroughEther
);
// Trade the Dai for the quoted token amount on Uniswap.
amounts = _uniswap_router877.SWAPEXACTTOKENSFORTOKENS457(
tokenAmountFromReserves, quotedDaiAmount, path, address(this), deadline
);
totalDaiBought = amounts[path.length - 1];
// Mint dDai using the received Dai.
totalDDaiMinted = _ddai325.MINT835(totalDaiBought);
}
function FINALIZEDAIDEPOSIT931( //inject NONSTANDARD NAMING
address smartWallet, address initialUserSigningKey, uint256 daiAmount
) external ONLYOWNEROR665(Role.DEPOSIT_MANAGER) {
// Ensure that the recipient is indeed a smart wallet.
_ENSURESMARTWALLET516(smartWallet, initialUserSigningKey);
// Ensure that the amount to transfer is lower than the limit.
require(daiAmount < _daiLimit, "Transfer size exceeds the limit.");
// Transfer the Dai to the specified smart wallet.
_TRANSFERTOKEN930(_dai939, smartWallet, daiAmount);
}
function FINALIZEDHARMADAIDEPOSIT237( //inject NONSTANDARD NAMING
address smartWallet, address initialUserSigningKey, uint256 dDaiAmount
) external ONLYOWNEROR665(Role.DEPOSIT_MANAGER) {
// Ensure that the recipient is indeed a smart wallet.
_ENSURESMARTWALLET516(smartWallet, initialUserSigningKey);
// Get the current dDai exchange rate.
uint256 exchangeRate = _ddai325.EXCHANGERATECURRENT826();
// Ensure that an exchange rate was actually returned.
require(exchangeRate != 0, "Could not retrieve dDai exchange rate.");
// Get the equivalent Dai amount of the transfer.
uint256 daiEquivalent = (dDaiAmount.MUL1(exchangeRate)) / 1e18;
// Ensure that the amount to transfer is lower than the limit.
require(daiEquivalent < _daiLimit, "Transfer size exceeds the limit.");
// Transfer the dDai to the specified smart wallet.
_TRANSFERTOKEN930(ERC20Interface(address(_ddai325)), smartWallet, dDaiAmount);
}
function FINALIZEETHERDEPOSIT298( //inject NONSTANDARD NAMING
address payable smartWallet,
address initialUserSigningKey,
uint256 etherAmount
) external ONLYOWNEROR665(Role.DEPOSIT_MANAGER) {
// Ensure that the recipient is indeed a smart wallet.
_ENSURESMARTWALLET516(smartWallet, initialUserSigningKey);
// Ensure that the amount to transfer is lower than the limit.
require(etherAmount < _etherLimit, "Transfer size exceeds the limit.");
// Transfer the Ether to the specified smart wallet.
bool ok;
(ok, ) = smartWallet.call.value(etherAmount)("");
if (!ok) {
assembly {
returndatacopy(0, 0, returndatasize)
revert(0, returndatasize)
}
}
}
function MINT835( //inject NONSTANDARD NAMING
uint256 daiAmount
) external ONLYOWNEROR665(Role.ADJUSTER) returns (uint256 dDaiMinted) {
// Use the specified amount of Dai to mint dDai.
dDaiMinted = _ddai325.MINT835(daiAmount);
}
function REDEEM834( //inject NONSTANDARD NAMING
uint256 dDaiAmount
) external ONLYOWNEROR665(Role.ADJUSTER) returns (uint256 daiReceived) {
// Redeem the specified amount of dDai for Dai.
daiReceived = _ddai325.REDEEM834(dDaiAmount);
}
function TRADEUSDCFORDDAI141( //inject NONSTANDARD NAMING
uint256 usdcAmount,
uint256 quotedDaiEquivalentAmount
) external ONLYOWNEROR665(Role.ADJUSTER) returns (uint256 dDaiMinted) {
dDaiMinted = _trade_helper648.TRADEUSDCFORDDAI141(
usdcAmount, quotedDaiEquivalentAmount
);
}
function TRADEDDAIFORUSDC353( //inject NONSTANDARD NAMING
uint256 daiEquivalentAmount,
uint256 quotedUSDCAmount
) external ONLYOWNEROR665(Role.ADJUSTER) returns (uint256 usdcReceived) {
usdcReceived = _trade_helper648.TRADEDDAIFORUSDC353(
daiEquivalentAmount, quotedUSDCAmount
);
}
function WITHDRAWUSDCTOPRIMARYRECIPIENT422( //inject NONSTANDARD NAMING
uint256 usdcAmount
) external ONLYOWNEROR665(Role.WITHDRAWAL_MANAGER) {
// Get the current primary recipient.
address primaryRecipient = _primaryUSDCRecipient;
require(
primaryRecipient != address(0), "No USDC primary recipient currently set."
);
// Transfer the supplied USDC amount to the primary recipient.
_TRANSFERTOKEN930(_usdc172, primaryRecipient, usdcAmount);
}
function WITHDRAWDAITOPRIMARYRECIPIENT762( //inject NONSTANDARD NAMING
uint256 daiAmount
) external ONLYOWNEROR665(Role.WITHDRAWAL_MANAGER) {
// Get the current primary recipient.
address primaryRecipient = _primaryDaiRecipient;
require(
primaryRecipient != address(0), "No Dai primary recipient currently set."
);
// Transfer the supplied Dai amount to the primary recipient.
_TRANSFERTOKEN930(_dai939, primaryRecipient, daiAmount);
}
function WITHDRAWUSDC678( //inject NONSTANDARD NAMING
address recipient, uint256 usdcAmount
) external ONLYOWNER389 {
// Transfer the USDC to the specified recipient.
_TRANSFERTOKEN930(_usdc172, recipient, usdcAmount);
}
function WITHDRAWDAI49( //inject NONSTANDARD NAMING
address recipient, uint256 daiAmount
) external ONLYOWNER389 {
// Transfer the Dai to the specified recipient.
_TRANSFERTOKEN930(_dai939, recipient, daiAmount);
}
function WITHDRAWDHARMADAI777( //inject NONSTANDARD NAMING
address recipient, uint256 dDaiAmount
) external ONLYOWNER389 {
// Transfer the dDai to the specified recipient.
_TRANSFERTOKEN930(ERC20Interface(address(_ddai325)), recipient, dDaiAmount);
}
function WITHDRAWETHER204( //inject NONSTANDARD NAMING
address payable recipient, uint256 etherAmount
) external ONLYOWNER389 {
bool ok;
// Transfer the Ether to the specified recipient.
(ok, ) = recipient.call.value(etherAmount)("");
if (!ok) {
assembly {
returndatacopy(0, 0, returndatasize)
revert(0, returndatasize)
}
}
}
function WITHDRAW439( //inject NONSTANDARD NAMING
ERC20Interface token, address recipient, uint256 amount
) external ONLYOWNER389 returns (bool success) {
// Transfer the token to the specified recipient.
success = token.TRANSFER424(recipient, amount);
}
function CALLANY778( //inject NONSTANDARD NAMING
address payable target, uint256 amount, bytes calldata data
) external ONLYOWNER389 returns (bool ok, bytes memory returnData) {
// Call the specified target and supply the specified data.
(ok, returnData) = target.call.value(amount)(data);
}
function SETDAILIMIT345(uint256 daiAmount) external ONLYOWNER389 { //inject NONSTANDARD NAMING
// Set the new limit.
_daiLimit = daiAmount;
}
function SETETHERLIMIT550(uint256 etherAmount) external ONLYOWNER389 { //inject NONSTANDARD NAMING
// Set the new limit.
_etherLimit = etherAmount;
}
function SETPRIMARYUSDCRECIPIENT259(address recipient) external ONLYOWNER389 { //inject NONSTANDARD NAMING
// Set the new primary recipient.
_primaryUSDCRecipient = recipient;
}
function SETPRIMARYDAIRECIPIENT972(address recipient) external ONLYOWNER389 { //inject NONSTANDARD NAMING
// Set the new primary recipient.
_primaryDaiRecipient = recipient;
}
function PAUSE504(Role role) external ONLYOWNEROR665(Role.PAUSER) { //inject NONSTANDARD NAMING
RoleStatus storage storedRoleStatus = _roles[uint256(role)];
require(!storedRoleStatus.paused, "Role in question is already paused.");
storedRoleStatus.paused = true;
emit ROLEPAUSED516(role);
}
function UNPAUSE768(Role role) external ONLYOWNER389 { //inject NONSTANDARD NAMING
RoleStatus storage storedRoleStatus = _roles[uint256(role)];
require(storedRoleStatus.paused, "Role in question is already unpaused.");
storedRoleStatus.paused = false;
emit ROLEUNPAUSED425(role);
}
function SETROLE712(Role role, address account) external ONLYOWNER389 { //inject NONSTANDARD NAMING
require(account != address(0), "Must supply an account.");
_SETROLE905(role, account);
}
function REMOVEROLE29(Role role) external ONLYOWNER389 { //inject NONSTANDARD NAMING
_SETROLE905(role, address(0));
}
function ISPAUSED423(Role role) external view returns (bool paused) { //inject NONSTANDARD NAMING
paused = _ISPAUSED128(role);
}
function ISROLE511(Role role) external view returns (bool hasRole) { //inject NONSTANDARD NAMING
hasRole = _ISROLE24(role);
}
function ISDHARMASMARTWALLET695( //inject NONSTANDARD NAMING
address smartWallet, address initialUserSigningKey
) external view returns (bool dharmaSmartWallet) {
dharmaSmartWallet = _ISSMARTWALLET926(smartWallet, initialUserSigningKey);
}
function GETDEPOSITMANAGER250() external view returns (address depositManager) { //inject NONSTANDARD NAMING
depositManager = _roles[uint256(Role.DEPOSIT_MANAGER)].account;
}
function GETADJUSTER715() external view returns (address adjuster) { //inject NONSTANDARD NAMING
adjuster = _roles[uint256(Role.ADJUSTER)].account;
}
function GETRESERVETRADER735() external view returns (address reserveTrader) { //inject NONSTANDARD NAMING
reserveTrader = _roles[uint256(Role.RESERVE_TRADER)].account;
}
function GETWITHDRAWALMANAGER7() external view returns (address withdrawalManager) { //inject NONSTANDARD NAMING
withdrawalManager = _roles[uint256(Role.WITHDRAWAL_MANAGER)].account;
}
function GETPAUSER73() external view returns (address pauser) { //inject NONSTANDARD NAMING
pauser = _roles[uint256(Role.PAUSER)].account;
}
function GETRESERVES254() external view returns ( //inject NONSTANDARD NAMING
uint256 dai, uint256 dDai, uint256 dDaiUnderlying
) {
dai = _dai939.BALANCEOF395(address(this));
dDai = _ddai325.BALANCEOF395(address(this));
dDaiUnderlying = _ddai325.BALANCEOFUNDERLYING111(address(this));
}
function GETDAILIMIT529() external view returns ( //inject NONSTANDARD NAMING
uint256 daiAmount, uint256 dDaiAmount
) {
daiAmount = _daiLimit;
dDaiAmount = (daiAmount.MUL1(1e18)).DIV802(_ddai325.EXCHANGERATECURRENT826());
}
function GETETHERLIMIT792() external view returns (uint256 etherAmount) { //inject NONSTANDARD NAMING
etherAmount = _etherLimit;
}
function GETPRIMARYUSDCRECIPIENT771() external view returns ( //inject NONSTANDARD NAMING
address recipient
) {
recipient = _primaryUSDCRecipient;
}
function GETPRIMARYDAIRECIPIENT209() external view returns ( //inject NONSTANDARD NAMING
address recipient
) {
recipient = _primaryDaiRecipient;
}
function GETIMPLEMENTATION393() external view returns ( //inject NONSTANDARD NAMING
address implementation
) {
(bool ok, bytes memory returnData) = address(
0x481B1a16E6675D33f8BBb3a6A58F5a9678649718
).staticcall("");
require(ok && returnData.length == 32, "Invalid implementation.");
implementation = abi.decode(returnData, (address));
}
function GETVERSION945() external view returns (uint256 version) { //inject NONSTANDARD NAMING
version = _version934;
}
function _GRANTUNISWAPROUTERAPPROVALIFNECESSARY324(ERC20Interface token) internal { //inject NONSTANDARD NAMING
// Approve Uniswap router to transfer tokens on behalf of this contract.
if (token.ALLOWANCE335(address(this), address(_uniswap_router877)) != uint256(-1)) {
(bool success, bytes memory data) = address(token).call(
abi.encodeWithSelector(
token.APPROVE301.selector, address(_uniswap_router877), uint256(-1)
)
);
require(
success && (data.length == 0 || abi.decode(data, (bool))),
"Token approval for Uniswap router failed."
);
}
}
function _SETROLE905(Role role, address account) internal { //inject NONSTANDARD NAMING
RoleStatus storage storedRoleStatus = _roles[uint256(role)];
if (account != storedRoleStatus.account) {
storedRoleStatus.account = account;
emit ROLEMODIFIED858(role, account);
}
}
function _ISROLE24(Role role) internal view returns (bool hasRole) { //inject NONSTANDARD NAMING
hasRole = msg.sender == _roles[uint256(role)].account;
}
function _ISPAUSED128(Role role) internal view returns (bool paused) { //inject NONSTANDARD NAMING
paused = _roles[uint256(role)].paused;
}
function _ISSMARTWALLET926( //inject NONSTANDARD NAMING
address smartWallet, address initialUserSigningKey
) internal pure returns (bool) {
// Derive the keccak256 hash of the smart wallet initialization code.
bytes32 initCodeHash = keccak256(
abi.encodePacked(
_wallet_creation_code_header138,
initialUserSigningKey,
_wallet_creation_code_footer303
)
);
// Attempt to derive a smart wallet address that matches the one provided.
address target;
for (uint256 nonce = 0; nonce < 10; nonce++) {
target = address( // derive the target deployment address.
uint160( // downcast to match the address type.
uint256( // cast to uint to truncate upper digits.
keccak256( // compute CREATE2 hash using all inputs.
abi.encodePacked( // pack all inputs to the hash together.
_create2_header376, // pass in control character + factory address.
nonce, // pass in current nonce as the salt.
initCodeHash // pass in hash of contract creation code.
)
)
)
)
);
// Exit early if the provided smart wallet matches derived target address.
if (target == smartWallet) {
return true;
}
// Otherwise, increment the nonce and derive a new salt.
nonce++;
}
// Explicity recognize no target was found matching provided smart wallet.
return false;
}
function _TRANSFERTOKEN930(ERC20Interface token, address to, uint256 amount) internal { //inject NONSTANDARD NAMING
(bool success, bytes memory data) = address(token).call(
abi.encodeWithSelector(token.TRANSFER424.selector, to, amount)
);
require(
success && (data.length == 0 || abi.decode(data, (bool))),
'Transfer out failed.'
);
}
function _TRANSFERINTOKEN213(ERC20Interface token, address from, uint256 amount) internal { //inject NONSTANDARD NAMING
(bool success, bytes memory data) = address(token).call(
abi.encodeWithSelector(token.TRANSFERFROM59.selector, from, address(this), amount)
);
require(
success && (data.length == 0 || abi.decode(data, (bool))),
'Transfer in failed.'
);
}
function _ENSURESMARTWALLET516( //inject NONSTANDARD NAMING
address smartWallet, address initialUserSigningKey
) internal view {
require(
_ISSMARTWALLET926(smartWallet, initialUserSigningKey),
"Could not resolve smart wallet using provided signing key."
);
}
function _CREATEPATHANDAMOUNTS796( //inject NONSTANDARD NAMING
address start, address end, bool routeThroughEther
) internal pure returns (address[] memory, uint256[] memory) {
uint256 pathLength = routeThroughEther ? 3 : 2;
address[] memory path = new address[](pathLength);
path[0] = start;
if (routeThroughEther) {
path[1] = _weth740;
}
path[pathLength - 1] = end;
return (path, new uint256[](pathLength));
}
modifier ONLYOWNEROR665(Role role) { //inject NONSTANDARD NAMING
if (!ISOWNER823()) {
require(_ISROLE24(role), "Caller does not have a required role.");
require(!_ISPAUSED128(role), "Role in question is currently paused.");
}
_;
}
} | inject NONSTANDARD NAMING
| function TRANSFERFROM59(address, address, uint256) external returns (bool); | 12,960,420 | [
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] |
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "./TradingAction.sol";
import "./ActionGuards.sol";
import "./nTokenMintAction.sol";
import "./nTokenRedeemAction.sol";
import "../SettleAssetsExternal.sol";
import "../FreeCollateralExternal.sol";
import "../../math/SafeInt256.sol";
import "../../global/StorageLayoutV1.sol";
import "../../internal/balances/BalanceHandler.sol";
import "../../internal/portfolio/PortfolioHandler.sol";
import "../../internal/AccountContextHandler.sol";
import "../../../interfaces/notional/NotionalCallback.sol";
contract BatchAction is StorageLayoutV1, ActionGuards {
using BalanceHandler for BalanceState;
using PortfolioHandler for PortfolioState;
using AccountContextHandler for AccountContext;
using SafeInt256 for int256;
/// @notice Executes a batch of balance transfers including minting and redeeming nTokens.
/// @param account the account for the action
/// @param actions array of balance actions to take, must be sorted by currency id
/// @dev emit:CashBalanceChange, emit:nTokenSupplyChange
/// @dev auth:msg.sender auth:ERC1155
function batchBalanceAction(address account, BalanceAction[] calldata actions)
external
payable
nonReentrant
{
require(account == msg.sender || msg.sender == address(this), "Unauthorized");
requireValidAccount(account);
// Return any settle amounts here to reduce the number of storage writes to balances
AccountContext memory accountContext = _settleAccountIfRequired(account);
BalanceState memory balanceState;
for (uint256 i = 0; i < actions.length; i++) {
BalanceAction calldata action = actions[i];
// msg.value will only be used when currency id == 1, referencing ETH. The requirement
// to sort actions by increasing id enforces that msg.value will only be used once.
if (i > 0) {
require(action.currencyId > actions[i - 1].currencyId, "Unsorted actions");
}
// Loads the currencyId into balance state
balanceState.loadBalanceState(account, action.currencyId, accountContext);
_executeDepositAction(
account,
balanceState,
action.actionType,
action.depositActionAmount
);
_calculateWithdrawActionAndFinalize(
account,
accountContext,
balanceState,
action.withdrawAmountInternalPrecision,
action.withdrawEntireCashBalance,
action.redeemToUnderlying
);
}
_finalizeAccountContext(account, accountContext);
}
/// @notice Executes a batch of balance transfers and trading actions
/// @param account the account for the action
/// @param actions array of balance actions with trades to take, must be sorted by currency id
/// @dev emit:CashBalanceChange, emit:nTokenSupplyChange, emit:LendBorrowTrade, emit:AddRemoveLiquidity,
/// @dev emit:SettledCashDebt, emit:nTokenResidualPurchase, emit:ReserveFeeAccrued
/// @dev auth:msg.sender auth:ERC1155
function batchBalanceAndTradeAction(address account, BalanceActionWithTrades[] calldata actions)
external
payable
nonReentrant
{
require(account == msg.sender || msg.sender == address(this), "Unauthorized");
requireValidAccount(account);
AccountContext memory accountContext = _batchBalanceAndTradeAction(account, actions);
_finalizeAccountContext(account, accountContext);
}
/// @notice Executes a batch of balance transfers and trading actions via an authorized callback contract. This
/// can be used as a "flash loan" facility for special contracts that migrate assets between protocols or perform
/// other actions on behalf of the user.
/// Contracts can borrow from Notional and receive a callback prior to an FC check, this can be useful if the contract
/// needs to perform a trade or repay a debt on a different protocol before depositing collateral. Since Notional's AMM
/// will never be as capital efficient or gas efficient as other flash loan facilities, this method requires whitelisting
/// and will mainly be used for contracts that make migrating assets a better user experience.
/// @param account the account that will take all the actions
/// @param actions array of balance actions with trades to take, must be sorted by currency id
/// @param callbackData arbitrary bytes to be passed backed to the caller in the callback
/// @dev emit:CashBalanceChange, emit:nTokenSupplyChange, emit:LendBorrowTrade, emit:AddRemoveLiquidity,
/// @dev emit:SettledCashDebt, emit:nTokenResidualPurchase, emit:ReserveFeeAccrued
/// @dev auth:authorizedCallbackContract
function batchBalanceAndTradeActionWithCallback(
address account,
BalanceActionWithTrades[] calldata actions,
bytes calldata callbackData
) external payable {
// NOTE: Re-entrancy is allowed for authorized callback functions.
require(authorizedCallbackContract[msg.sender], "Unauthorized");
requireValidAccount(account);
AccountContext memory accountContext = _batchBalanceAndTradeAction(account, actions);
accountContext.setAccountContext(account);
// Be sure to set the account context before initiating the callback, all stateful updates
// have been finalized at this point so we are safe to issue a callback. This callback may
// re-enter Notional safely to deposit or take other actions.
NotionalCallback(msg.sender).notionalCallback(msg.sender, account, callbackData);
if (accountContext.hasDebt != 0x00) {
// NOTE: this method may update the account context to turn off the hasDebt flag, this
// is ok because the worst case would be causing an extra free collateral check when it
// is not required. This check will be entered if the account hasDebt prior to the callback
// being triggered above, so it will happen regardless of what the callback function does.
FreeCollateralExternal.checkFreeCollateralAndRevert(account);
}
}
function _batchBalanceAndTradeAction(
address account,
BalanceActionWithTrades[] calldata actions
) internal returns (AccountContext memory) {
AccountContext memory accountContext = _settleAccountIfRequired(account);
BalanceState memory balanceState;
// NOTE: loading the portfolio state must happen after settle account to get the
// correct portfolio, it will have changed if the account is settled.
PortfolioState memory portfolioState = PortfolioHandler.buildPortfolioState(
account,
accountContext.assetArrayLength,
0
);
for (uint256 i = 0; i < actions.length; i++) {
BalanceActionWithTrades calldata action = actions[i];
// msg.value will only be used when currency id == 1, referencing ETH. The requirement
// to sort actions by increasing id enforces that msg.value will only be used once.
if (i > 0) {
require(action.currencyId > actions[i - 1].currencyId, "Unsorted actions");
}
// Loads the currencyId into balance state
balanceState.loadBalanceState(account, action.currencyId, accountContext);
// Does not revert on invalid action types here, they also have no effect.
_executeDepositAction(
account,
balanceState,
action.actionType,
action.depositActionAmount
);
if (action.trades.length > 0) {
int256 netCash;
if (accountContext.isBitmapEnabled()) {
require(
accountContext.bitmapCurrencyId == action.currencyId,
"Invalid trades for account"
);
bool didIncurDebt;
(netCash, didIncurDebt) = TradingAction.executeTradesBitmapBatch(
account,
accountContext.bitmapCurrencyId,
accountContext.nextSettleTime,
action.trades
);
if (didIncurDebt) {
accountContext.hasDebt = Constants.HAS_ASSET_DEBT | accountContext.hasDebt;
}
} else {
// NOTE: we return portfolio state here instead of setting it inside executeTradesArrayBatch
// because we want to only write to storage once after all trades are completed
(portfolioState, netCash) = TradingAction.executeTradesArrayBatch(
account,
action.currencyId,
portfolioState,
action.trades
);
}
// If the account owes cash after trading, ensure that it has enough
if (netCash < 0) _checkSufficientCash(balanceState, netCash.neg());
balanceState.netCashChange = balanceState.netCashChange.add(netCash);
}
_calculateWithdrawActionAndFinalize(
account,
accountContext,
balanceState,
action.withdrawAmountInternalPrecision,
action.withdrawEntireCashBalance,
action.redeemToUnderlying
);
}
// Update the portfolio state if bitmap is not enabled. If bitmap is already enabled
// then all the assets have already been updated in in storage.
if (!accountContext.isBitmapEnabled()) {
// NOTE: account context is updated in memory inside this method call.
accountContext.storeAssetsAndUpdateContext(account, portfolioState, false);
}
// NOTE: free collateral and account context will be set outside of this method call.
return accountContext;
}
/// @dev Executes deposits
function _executeDepositAction(
address account,
BalanceState memory balanceState,
DepositActionType depositType,
uint256 depositActionAmount_
) private {
int256 depositActionAmount = SafeInt256.toInt(depositActionAmount_);
int256 assetInternalAmount;
require(depositActionAmount >= 0);
if (depositType == DepositActionType.None) {
return;
} else if (
depositType == DepositActionType.DepositAsset ||
depositType == DepositActionType.DepositAssetAndMintNToken
) {
// NOTE: this deposit will NOT revert on a failed transfer unless there is a
// transfer fee. The actual transfer will take effect later in balanceState.finalize
assetInternalAmount = balanceState.depositAssetToken(
account,
depositActionAmount,
false // no force transfer
);
} else if (
depositType == DepositActionType.DepositUnderlying ||
depositType == DepositActionType.DepositUnderlyingAndMintNToken
) {
// NOTE: this deposit will revert on a failed transfer immediately
assetInternalAmount = balanceState.depositUnderlyingToken(account, depositActionAmount);
} else if (depositType == DepositActionType.ConvertCashToNToken) {
// _executeNTokenAction will check if the account has sufficient cash
assetInternalAmount = depositActionAmount;
}
_executeNTokenAction(
balanceState,
depositType,
depositActionAmount,
assetInternalAmount
);
}
/// @dev Executes nToken actions
function _executeNTokenAction(
BalanceState memory balanceState,
DepositActionType depositType,
int256 depositActionAmount,
int256 assetInternalAmount
) private {
// After deposits have occurred, check if we are minting nTokens
if (
depositType == DepositActionType.DepositAssetAndMintNToken ||
depositType == DepositActionType.DepositUnderlyingAndMintNToken ||
depositType == DepositActionType.ConvertCashToNToken
) {
// Will revert if trying to mint ntokens and results in a negative cash balance
_checkSufficientCash(balanceState, assetInternalAmount);
balanceState.netCashChange = balanceState.netCashChange.sub(assetInternalAmount);
// Converts a given amount of cash (denominated in internal precision) into nTokens
int256 tokensMinted = nTokenMintAction.nTokenMint(
balanceState.currencyId,
assetInternalAmount
);
balanceState.netNTokenSupplyChange = balanceState.netNTokenSupplyChange.add(
tokensMinted
);
} else if (depositType == DepositActionType.RedeemNToken) {
require(
// prettier-ignore
balanceState
.storedNTokenBalance
.add(balanceState.netNTokenTransfer) // transfers would not occur at this point
.add(balanceState.netNTokenSupplyChange) >= depositActionAmount,
"Insufficient token balance"
);
balanceState.netNTokenSupplyChange = balanceState.netNTokenSupplyChange.sub(
depositActionAmount
);
int256 assetCash = nTokenRedeemAction.nTokenRedeemViaBatch(
balanceState.currencyId,
depositActionAmount
);
balanceState.netCashChange = balanceState.netCashChange.add(assetCash);
}
}
/// @dev Calculations any withdraws and finalizes balances
function _calculateWithdrawActionAndFinalize(
address account,
AccountContext memory accountContext,
BalanceState memory balanceState,
uint256 withdrawAmountInternalPrecision,
bool withdrawEntireCashBalance,
bool redeemToUnderlying
) private {
int256 withdrawAmount = SafeInt256.toInt(withdrawAmountInternalPrecision);
require(withdrawAmount >= 0); // dev: withdraw action overflow
// NOTE: if withdrawEntireCashBalance is set it will override the withdrawAmountInternalPrecision input
if (withdrawEntireCashBalance) {
// This option is here so that accounts do not end up with dust after lending since we generally
// cannot calculate exact cash amounts from the liquidity curve.
withdrawAmount = balanceState.storedCashBalance
.add(balanceState.netCashChange)
.add(balanceState.netAssetTransferInternalPrecision);
// If the account has a negative cash balance then cannot withdraw
if (withdrawAmount < 0) withdrawAmount = 0;
}
// prettier-ignore
balanceState.netAssetTransferInternalPrecision = balanceState
.netAssetTransferInternalPrecision
.sub(withdrawAmount);
balanceState.finalize(account, accountContext, redeemToUnderlying);
}
function _finalizeAccountContext(address account, AccountContext memory accountContext)
private
{
// At this point all balances, market states and portfolio states should be finalized. Just need to check free
// collateral if required.
accountContext.setAccountContext(account);
if (accountContext.hasDebt != 0x00) {
FreeCollateralExternal.checkFreeCollateralAndRevert(account);
}
}
/// @notice When lending, adding liquidity or minting nTokens the account must have a sufficient cash balance
/// to do so.
function _checkSufficientCash(BalanceState memory balanceState, int256 amountInternalPrecision)
private
pure
{
// The total cash position at this point is: storedCashBalance + netCashChange + netAssetTransferInternalPrecision
require(
amountInternalPrecision >= 0 &&
balanceState.storedCashBalance
.add(balanceState.netCashChange)
.add(balanceState.netAssetTransferInternalPrecision) >= amountInternalPrecision,
"Insufficient cash"
);
}
function _settleAccountIfRequired(address account)
private
returns (AccountContext memory)
{
AccountContext memory accountContext = AccountContextHandler.getAccountContext(account);
if (accountContext.mustSettleAssets()) {
// Returns a new memory reference to account context
return SettleAssetsExternal.settleAccount(account, accountContext);
} else {
return accountContext;
}
}
/// @notice Get a list of deployed library addresses (sorted by library name)
function getLibInfo() external view returns (address, address, address, address, address, address) {
return (
address(FreeCollateralExternal),
address(MigrateIncentives),
address(SettleAssetsExternal),
address(TradingAction),
address(nTokenMintAction),
address(nTokenRedeemAction)
);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../FreeCollateralExternal.sol";
import "../SettleAssetsExternal.sol";
import "../../internal/markets/Market.sol";
import "../../internal/markets/CashGroup.sol";
import "../../internal/markets/AssetRate.sol";
import "../../internal/balances/BalanceHandler.sol";
import "../../internal/portfolio/PortfolioHandler.sol";
import "../../internal/portfolio/TransferAssets.sol";
import "../../math/SafeInt256.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
library TradingAction {
using PortfolioHandler for PortfolioState;
using AccountContextHandler for AccountContext;
using Market for MarketParameters;
using CashGroup for CashGroupParameters;
using AssetRate for AssetRateParameters;
using SafeInt256 for int256;
using SafeMath for uint256;
event LendBorrowTrade(
address indexed account,
uint16 indexed currencyId,
uint40 maturity,
int256 netAssetCash,
int256 netfCash
);
event AddRemoveLiquidity(
address indexed account,
uint16 indexed currencyId,
uint40 maturity,
int256 netAssetCash,
int256 netfCash,
int256 netLiquidityTokens
);
event SettledCashDebt(
address indexed settledAccount,
uint16 indexed currencyId,
address indexed settler,
int256 amountToSettleAsset,
int256 fCashAmount
);
event nTokenResidualPurchase(
uint16 indexed currencyId,
uint40 indexed maturity,
address indexed purchaser,
int256 fCashAmountToPurchase,
int256 netAssetCashNToken
);
/// @dev Used internally to manage stack issues
struct TradeContext {
int256 cash;
int256 fCashAmount;
int256 fee;
int256 netCash;
int256 totalFee;
uint256 blockTime;
}
/// @notice Executes trades for a bitmapped portfolio, cannot be called directly
/// @param account account to put fCash assets in
/// @param bitmapCurrencyId currency id of the bitmap
/// @param nextSettleTime used to calculate the relative positions in the bitmap
/// @param trades tightly packed array of trades, schema is defined in global/Types.sol
/// @return netCash generated by trading
/// @return didIncurDebt if the bitmap had an fCash position go negative
function executeTradesBitmapBatch(
address account,
uint16 bitmapCurrencyId,
uint40 nextSettleTime,
bytes32[] calldata trades
) external returns (int256, bool) {
CashGroupParameters memory cashGroup = CashGroup.buildCashGroupStateful(bitmapCurrencyId);
MarketParameters memory market;
bool didIncurDebt;
TradeContext memory c;
c.blockTime = block.timestamp;
for (uint256 i = 0; i < trades.length; i++) {
uint256 maturity;
(maturity, c.cash, c.fCashAmount) = _executeTrade(
account,
cashGroup,
market,
trades[i],
c.blockTime
);
c.fCashAmount = BitmapAssetsHandler.addifCashAsset(
account,
bitmapCurrencyId,
maturity,
nextSettleTime,
c.fCashAmount
);
didIncurDebt = didIncurDebt || (c.fCashAmount < 0);
c.netCash = c.netCash.add(c.cash);
}
return (c.netCash, didIncurDebt);
}
/// @notice Executes trades for a bitmapped portfolio, cannot be called directly
/// @param account account to put fCash assets in
/// @param currencyId currency id to trade
/// @param portfolioState used to update the positions in the portfolio
/// @param trades tightly packed array of trades, schema is defined in global/Types.sol
/// @return resulting portfolio state
/// @return netCash generated by trading
function executeTradesArrayBatch(
address account,
uint16 currencyId,
PortfolioState memory portfolioState,
bytes32[] calldata trades
) external returns (PortfolioState memory, int256) {
CashGroupParameters memory cashGroup = CashGroup.buildCashGroupStateful(currencyId);
MarketParameters memory market;
TradeContext memory c;
c.blockTime = block.timestamp;
for (uint256 i = 0; i < trades.length; i++) {
TradeActionType tradeType = TradeActionType(uint256(uint8(bytes1(trades[i]))));
if (
tradeType == TradeActionType.AddLiquidity ||
tradeType == TradeActionType.RemoveLiquidity
) {
revert("Disabled");
/**
* Manual adding and removing of liquidity is currently disabled.
*
* // Liquidity tokens can only be added by array portfolio
* c.cash = _executeLiquidityTrade(
* account,
* cashGroup,
* market,
* tradeType,
* trades[i],
* portfolioState,
* c.netCash
* );
*/
} else {
uint256 maturity;
(maturity, c.cash, c.fCashAmount) = _executeTrade(
account,
cashGroup,
market,
trades[i],
c.blockTime
);
portfolioState.addAsset(
currencyId,
maturity,
Constants.FCASH_ASSET_TYPE,
c.fCashAmount
);
}
c.netCash = c.netCash.add(c.cash);
}
return (portfolioState, c.netCash);
}
/// @notice Executes a non-liquidity token trade
/// @param account the initiator of the trade
/// @param cashGroup parameters for the trade
/// @param market market memory location to use
/// @param trade bytes32 encoding of the particular trade
/// @param blockTime the current block time
/// @return maturity of the asset that was traded
/// @return cashAmount - a positive or negative cash amount accrued to the account
/// @return fCashAmount - a positive or negative fCash amount accrued to the account
function _executeTrade(
address account,
CashGroupParameters memory cashGroup,
MarketParameters memory market,
bytes32 trade,
uint256 blockTime
)
private
returns (
uint256 maturity,
int256 cashAmount,
int256 fCashAmount
)
{
TradeActionType tradeType = TradeActionType(uint256(uint8(bytes1(trade))));
if (tradeType == TradeActionType.PurchaseNTokenResidual) {
(maturity, cashAmount, fCashAmount) = _purchaseNTokenResidual(
account,
cashGroup,
blockTime,
trade
);
} else if (tradeType == TradeActionType.SettleCashDebt) {
(maturity, cashAmount, fCashAmount) = _settleCashDebt(account, cashGroup, blockTime, trade);
} else if (tradeType == TradeActionType.Lend || tradeType == TradeActionType.Borrow) {
(cashAmount, fCashAmount) = _executeLendBorrowTrade(
cashGroup,
market,
tradeType,
blockTime,
trade
);
// This is a little ugly but required to deal with stack issues. We know the market is loaded
// with the proper maturity inside _executeLendBorrowTrade
maturity = market.maturity;
emit LendBorrowTrade(
account,
uint16(cashGroup.currencyId),
uint40(maturity),
cashAmount,
fCashAmount
);
} else {
revert("Invalid trade type");
}
}
/// @notice Executes a liquidity token trade, no fees incurred and only array portfolios may hold
/// liquidity tokens.
/// @param account the initiator of the trade
/// @param cashGroup parameters for the trade
/// @param market market memory location to use
/// @param tradeType whether this is add or remove liquidity
/// @param trade bytes32 encoding of the particular trade
/// @param portfolioState the current account's portfolio state
/// @param netCash the current net cash accrued in this batch of trades, can be
// used for adding liquidity
/// @return cashAmount: a positive or negative cash amount accrued to the account
function _executeLiquidityTrade(
address account,
CashGroupParameters memory cashGroup,
MarketParameters memory market,
TradeActionType tradeType,
bytes32 trade,
PortfolioState memory portfolioState,
int256 netCash
) private returns (int256) {
uint256 marketIndex = uint8(bytes1(trade << 8));
// NOTE: this loads the market in memory
cashGroup.loadMarket(market, marketIndex, true, block.timestamp);
int256 cashAmount;
int256 fCashAmount;
int256 tokens;
if (tradeType == TradeActionType.AddLiquidity) {
cashAmount = int256((uint256(trade) >> 152) & type(uint88).max);
// Setting cash amount to zero will deposit all net cash accumulated in this trade into
// liquidity. This feature allows accounts to borrow in one maturity to provide liquidity
// in another in a single transaction without dust. It also allows liquidity providers to
// sell off the net cash residuals and use the cash amount in the new market without dust
if (cashAmount == 0) cashAmount = netCash;
// Add liquidity will check cash amount is positive
(tokens, fCashAmount) = market.addLiquidity(cashAmount);
cashAmount = cashAmount.neg(); // Report a negative cash amount in the event
} else {
tokens = int256((uint256(trade) >> 152) & type(uint88).max);
(cashAmount, fCashAmount) = market.removeLiquidity(tokens);
tokens = tokens.neg(); // Report a negative amount tokens in the event
}
{
uint256 minImpliedRate = uint32(uint256(trade) >> 120);
uint256 maxImpliedRate = uint32(uint256(trade) >> 88);
// If minImpliedRate is not set then it will be zero
require(market.lastImpliedRate >= minImpliedRate, "Trade failed, slippage");
if (maxImpliedRate != 0)
require(market.lastImpliedRate <= maxImpliedRate, "Trade failed, slippage");
}
// Add the assets in this order so they are sorted
portfolioState.addAsset(
cashGroup.currencyId,
market.maturity,
Constants.FCASH_ASSET_TYPE,
fCashAmount
);
// Adds the liquidity token asset
portfolioState.addAsset(
cashGroup.currencyId,
market.maturity,
marketIndex + 1,
tokens
);
emit AddRemoveLiquidity(
account,
cashGroup.currencyId,
// This will not overflow for a long time
uint40(market.maturity),
cashAmount,
fCashAmount,
tokens
);
return cashAmount;
}
/// @notice Executes a lend or borrow trade
/// @param cashGroup parameters for the trade
/// @param market market memory location to use
/// @param tradeType whether this is add or remove liquidity
/// @param blockTime the current block time
/// @param trade bytes32 encoding of the particular trade
/// @return cashAmount - a positive or negative cash amount accrued to the account
/// @return fCashAmount - a positive or negative fCash amount accrued to the account
function _executeLendBorrowTrade(
CashGroupParameters memory cashGroup,
MarketParameters memory market,
TradeActionType tradeType,
uint256 blockTime,
bytes32 trade
)
private
returns (
int256 cashAmount,
int256 fCashAmount
)
{
uint256 marketIndex = uint256(uint8(bytes1(trade << 8)));
// NOTE: this updates the market in memory
cashGroup.loadMarket(market, marketIndex, false, blockTime);
fCashAmount = int256(uint88(bytes11(trade << 16)));
// fCash to account will be negative here
if (tradeType == TradeActionType.Borrow) fCashAmount = fCashAmount.neg();
cashAmount = market.executeTrade(
cashGroup,
fCashAmount,
market.maturity.sub(blockTime),
marketIndex
);
require(cashAmount != 0, "Trade failed, liquidity");
uint256 rateLimit = uint256(uint32(bytes4(trade << 104)));
if (rateLimit != 0) {
if (tradeType == TradeActionType.Borrow) {
// Do not allow borrows over the rate limit
require(market.lastImpliedRate <= rateLimit, "Trade failed, slippage");
} else {
// Do not allow lends under the rate limit
require(market.lastImpliedRate >= rateLimit, "Trade failed, slippage");
}
}
}
/// @notice If an account has a negative cash balance we allow anyone to lend to to that account at a penalty
/// rate to the 3 month market.
/// @param account the account initiating the trade, used to check that self settlement is not possible
/// @param cashGroup parameters for the trade
/// @param blockTime the current block time
/// @param trade bytes32 encoding of the particular trade
/// @return maturity: the date of the three month maturity where fCash will be exchanged
/// @return cashAmount: a negative cash amount that the account must pay to the settled account
/// @return fCashAmount: a positive fCash amount that the account will receive
function _settleCashDebt(
address account,
CashGroupParameters memory cashGroup,
uint256 blockTime,
bytes32 trade
)
internal
returns (
uint256,
int256,
int256
)
{
address counterparty = address(uint256(trade) >> 88);
// Allowing an account to settle itself would result in strange outcomes
require(account != counterparty, "Cannot settle self");
int256 amountToSettleAsset = int256(uint88(uint256(trade)));
AccountContext memory counterpartyContext =
AccountContextHandler.getAccountContext(counterparty);
if (counterpartyContext.mustSettleAssets()) {
counterpartyContext = SettleAssetsExternal.settleAccount(counterparty, counterpartyContext);
}
// This will check if the amountToSettleAsset is valid and revert if it is not. Amount to settle is a positive
// number denominated in asset terms. If amountToSettleAsset is set equal to zero on the input, will return the
// max amount to settle. This will update the balance storage on the counterparty.
amountToSettleAsset = BalanceHandler.setBalanceStorageForSettleCashDebt(
counterparty,
cashGroup,
amountToSettleAsset,
counterpartyContext
);
// Settled account must borrow from the 3 month market at a penalty rate. This will fail if the market
// is not initialized.
uint256 threeMonthMaturity = DateTime.getReferenceTime(blockTime) + Constants.QUARTER;
int256 fCashAmount =
_getfCashSettleAmount(cashGroup, threeMonthMaturity, blockTime, amountToSettleAsset);
// Defensive check to ensure that we can't inadvertently cause the settler to lose fCash.
require(fCashAmount >= 0);
// It's possible that this action will put an account into negative free collateral. In this case they
// will immediately become eligible for liquidation and the account settling the debt can also liquidate
// them in the same transaction. Do not run a free collateral check here to allow this to happen.
{
PortfolioAsset[] memory assets = new PortfolioAsset[](1);
assets[0].currencyId = cashGroup.currencyId;
assets[0].maturity = threeMonthMaturity;
assets[0].notional = fCashAmount.neg(); // This is the debt the settled account will incur
assets[0].assetType = Constants.FCASH_ASSET_TYPE;
// Can transfer assets, we have settled above
counterpartyContext = TransferAssets.placeAssetsInAccount(
counterparty,
counterpartyContext,
assets
);
}
counterpartyContext.setAccountContext(counterparty);
emit SettledCashDebt(
counterparty,
uint16(cashGroup.currencyId),
account,
amountToSettleAsset,
fCashAmount.neg()
);
return (threeMonthMaturity, amountToSettleAsset.neg(), fCashAmount);
}
/// @dev Helper method to calculate the fCashAmount from the penalty settlement rate
function _getfCashSettleAmount(
CashGroupParameters memory cashGroup,
uint256 threeMonthMaturity,
uint256 blockTime,
int256 amountToSettleAsset
) private view returns (int256) {
uint256 oracleRate = cashGroup.calculateOracleRate(threeMonthMaturity, blockTime);
int256 exchangeRate =
Market.getExchangeRateFromImpliedRate(
oracleRate.add(cashGroup.getSettlementPenalty()),
threeMonthMaturity.sub(blockTime)
);
// Amount to settle is positive, this returns the fCashAmount that the settler will
// receive as a positive number
return
cashGroup.assetRate
.convertToUnderlying(amountToSettleAsset)
// Exchange rate converts from cash to fCash when multiplying
.mulInRatePrecision(exchangeRate);
}
/// @notice Allows an account to purchase ntoken residuals
/// @param purchaser account that is purchasing the residuals
/// @param cashGroup parameters for the trade
/// @param blockTime the current block time
/// @param trade bytes32 encoding of the particular trade
/// @return maturity: the date of the idiosyncratic maturity where fCash will be exchanged
/// @return cashAmount: a positive or negative cash amount that the account will receive or pay
/// @return fCashAmount: a positive or negative fCash amount that the account will receive
function _purchaseNTokenResidual(
address purchaser,
CashGroupParameters memory cashGroup,
uint256 blockTime,
bytes32 trade
)
internal
returns (
uint256,
int256,
int256
)
{
uint256 maturity = uint256(uint32(uint256(trade) >> 216));
int256 fCashAmountToPurchase = int88(uint88(uint256(trade) >> 128));
require(maturity > blockTime, "Invalid maturity");
// Require that the residual to purchase does not fall on an existing maturity (i.e.
// it is an idiosyncratic maturity)
require(
!DateTime.isValidMarketMaturity(cashGroup.maxMarketIndex, maturity, blockTime),
"Non idiosyncratic maturity"
);
address nTokenAddress = nTokenHandler.nTokenAddress(cashGroup.currencyId);
// prettier-ignore
(
/* currencyId */,
/* incentiveRate */,
uint256 lastInitializedTime,
/* assetArrayLength */,
bytes5 parameters
) = nTokenHandler.getNTokenContext(nTokenAddress);
// Restrict purchasing until some amount of time after the last initialized time to ensure that arbitrage
// opportunities are not available (by generating residuals and then immediately purchasing them at a discount)
// This is always relative to the last initialized time which is set at utc0 when initialized, not the
// reference time. Therefore we will always restrict residual purchase relative to initialization, not reference.
// This is safer, prevents an attack if someone forces residuals and then somehow prevents market initialization
// until the residual time buffer passes.
require(
blockTime >
lastInitializedTime.add(
uint256(uint8(parameters[Constants.RESIDUAL_PURCHASE_TIME_BUFFER])) * 1 hours
),
"Insufficient block time"
);
int256 notional =
BitmapAssetsHandler.getifCashNotional(nTokenAddress, cashGroup.currencyId, maturity);
// Check if amounts are valid and set them to the max available if necessary
if (notional < 0 && fCashAmountToPurchase < 0) {
// Does not allow purchasing more negative notional than available
if (fCashAmountToPurchase < notional) fCashAmountToPurchase = notional;
} else if (notional > 0 && fCashAmountToPurchase > 0) {
// Does not allow purchasing more positive notional than available
if (fCashAmountToPurchase > notional) fCashAmountToPurchase = notional;
} else {
// Does not allow moving notional in the opposite direction
revert("Invalid amount");
}
// If fCashAmount > 0 then this will return netAssetCash > 0, if fCashAmount < 0 this will return
// netAssetCash < 0. fCashAmount will go to the purchaser and netAssetCash will go to the nToken.
int256 netAssetCashNToken =
_getResidualPriceAssetCash(
cashGroup,
maturity,
blockTime,
fCashAmountToPurchase,
parameters
);
_updateNTokenPortfolio(
nTokenAddress,
cashGroup.currencyId,
maturity,
lastInitializedTime,
fCashAmountToPurchase,
netAssetCashNToken
);
emit nTokenResidualPurchase(
uint16(cashGroup.currencyId),
uint40(maturity),
purchaser,
fCashAmountToPurchase,
netAssetCashNToken
);
return (maturity, netAssetCashNToken.neg(), fCashAmountToPurchase);
}
/// @notice Returns the amount of asset cash required to purchase the nToken residual
function _getResidualPriceAssetCash(
CashGroupParameters memory cashGroup,
uint256 maturity,
uint256 blockTime,
int256 fCashAmount,
bytes6 parameters
) internal view returns (int256) {
uint256 oracleRate = cashGroup.calculateOracleRate(maturity, blockTime);
// Residual purchase incentive is specified in ten basis point increments
uint256 purchaseIncentive =
uint256(uint8(parameters[Constants.RESIDUAL_PURCHASE_INCENTIVE])) *
Constants.TEN_BASIS_POINTS;
if (fCashAmount > 0) {
// When fCash is positive then we add the purchase incentive, the purchaser
// can pay less cash for the fCash relative to the oracle rate
oracleRate = oracleRate.add(purchaseIncentive);
} else if (oracleRate > purchaseIncentive) {
// When fCash is negative, we reduce the interest rate that the purchaser will
// borrow at, we do this check to ensure that we floor the oracle rate at zero.
oracleRate = oracleRate.sub(purchaseIncentive);
} else {
// If the oracle rate is less than the purchase incentive floor the interest rate at zero
oracleRate = 0;
}
int256 exchangeRate =
Market.getExchangeRateFromImpliedRate(oracleRate, maturity.sub(blockTime));
// Returns the net asset cash from the nToken perspective, which is the same sign as the fCash amount
return
cashGroup.assetRate.convertFromUnderlying(fCashAmount.divInRatePrecision(exchangeRate));
}
function _updateNTokenPortfolio(
address nTokenAddress,
uint256 currencyId,
uint256 maturity,
uint256 lastInitializedTime,
int256 fCashAmountToPurchase,
int256 netAssetCashNToken
) private {
int256 finalNotional = BitmapAssetsHandler.addifCashAsset(
nTokenAddress,
currencyId,
maturity,
lastInitializedTime,
fCashAmountToPurchase.neg() // the nToken takes on the negative position
);
// Defensive check to ensure that fCash amounts do not flip signs
require(
(fCashAmountToPurchase > 0 && finalNotional >= 0) ||
(fCashAmountToPurchase < 0 && finalNotional <= 0)
);
// prettier-ignore
(
int256 nTokenCashBalance,
/* storedNTokenBalance */,
/* lastClaimTime */,
/* accountIncentiveDebt */
) = BalanceHandler.getBalanceStorage(nTokenAddress, currencyId);
nTokenCashBalance = nTokenCashBalance.add(netAssetCashNToken);
// This will ensure that the cash balance is not negative
BalanceHandler.setBalanceStorageForNToken(nTokenAddress, currencyId, nTokenCashBalance);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../../global/StorageLayoutV1.sol";
import "../../internal/nToken/nTokenHandler.sol";
abstract contract ActionGuards is StorageLayoutV1 {
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
function initializeReentrancyGuard() internal {
require(reentrancyStatus == 0);
// Initialize the guard to a non-zero value, see the OZ reentrancy guard
// description for why this is more gas efficient:
// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/security/ReentrancyGuard.sol
reentrancyStatus = _NOT_ENTERED;
}
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(reentrancyStatus != _ENTERED, "Reentrant call");
// Any calls to nonReentrant after this point will fail
reentrancyStatus = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
reentrancyStatus = _NOT_ENTERED;
}
// These accounts cannot receive deposits, transfers, fCash or any other
// types of value transfers.
function requireValidAccount(address account) internal view {
require(account != Constants.RESERVE); // Reserve address is address(0)
require(account != address(this));
(
uint256 isNToken,
/* incentiveAnnualEmissionRate */,
/* lastInitializedTime */,
/* assetArrayLength */,
/* parameters */
) = nTokenHandler.getNTokenContext(account);
require(isNToken == 0);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../../global/Constants.sol";
import "../../internal/nToken/nTokenHandler.sol";
import "../../internal/nToken/nTokenCalculations.sol";
import "../../internal/markets/Market.sol";
import "../../internal/markets/CashGroup.sol";
import "../../internal/markets/AssetRate.sol";
import "../../internal/balances/BalanceHandler.sol";
import "../../internal/portfolio/PortfolioHandler.sol";
import "../../math/SafeInt256.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
library nTokenMintAction {
using SafeInt256 for int256;
using BalanceHandler for BalanceState;
using CashGroup for CashGroupParameters;
using Market for MarketParameters;
using nTokenHandler for nTokenPortfolio;
using PortfolioHandler for PortfolioState;
using AssetRate for AssetRateParameters;
using SafeMath for uint256;
using nTokenHandler for nTokenPortfolio;
/// @notice Converts the given amount of cash to nTokens in the same currency.
/// @param currencyId the currency associated the nToken
/// @param amountToDepositInternal the amount of asset tokens to deposit denominated in internal decimals
/// @return nTokens minted by this action
function nTokenMint(uint16 currencyId, int256 amountToDepositInternal)
external
returns (int256)
{
uint256 blockTime = block.timestamp;
nTokenPortfolio memory nToken;
nToken.loadNTokenPortfolioStateful(currencyId);
int256 tokensToMint = calculateTokensToMint(nToken, amountToDepositInternal, blockTime);
require(tokensToMint >= 0, "Invalid token amount");
if (nToken.portfolioState.storedAssets.length == 0) {
// If the token does not have any assets, then the markets must be initialized first.
nToken.cashBalance = nToken.cashBalance.add(amountToDepositInternal);
BalanceHandler.setBalanceStorageForNToken(
nToken.tokenAddress,
currencyId,
nToken.cashBalance
);
} else {
_depositIntoPortfolio(nToken, amountToDepositInternal, blockTime);
}
// NOTE: token supply does not change here, it will change after incentives have been claimed
// during BalanceHandler.finalize
return tokensToMint;
}
/// @notice Calculates the tokens to mint to the account as a ratio of the nToken
/// present value denominated in asset cash terms.
/// @return the amount of tokens to mint, the ifCash bitmap
function calculateTokensToMint(
nTokenPortfolio memory nToken,
int256 amountToDepositInternal,
uint256 blockTime
) internal view returns (int256) {
require(amountToDepositInternal >= 0); // dev: deposit amount negative
if (amountToDepositInternal == 0) return 0;
if (nToken.lastInitializedTime != 0) {
// For the sake of simplicity, nTokens cannot be minted if they have assets
// that need to be settled. This is only done during market initialization.
uint256 nextSettleTime = nToken.getNextSettleTime();
// If next settle time <= blockTime then the token can be settled
require(nextSettleTime > blockTime, "Requires settlement");
}
int256 assetCashPV = nTokenCalculations.getNTokenAssetPV(nToken, blockTime);
// Defensive check to ensure PV remains positive
require(assetCashPV >= 0);
// Allow for the first deposit
if (nToken.totalSupply == 0) {
return amountToDepositInternal;
} else {
// assetCashPVPost = assetCashPV + amountToDeposit
// (tokenSupply + tokensToMint) / tokenSupply == (assetCashPV + amountToDeposit) / assetCashPV
// (tokenSupply + tokensToMint) == (assetCashPV + amountToDeposit) * tokenSupply / assetCashPV
// (tokenSupply + tokensToMint) == tokenSupply + (amountToDeposit * tokenSupply) / assetCashPV
// tokensToMint == (amountToDeposit * tokenSupply) / assetCashPV
return amountToDepositInternal.mul(nToken.totalSupply).div(assetCashPV);
}
}
/// @notice Portions out assetCashDeposit into amounts to deposit into individual markets. When
/// entering this method we know that assetCashDeposit is positive and the nToken has been
/// initialized to have liquidity tokens.
function _depositIntoPortfolio(
nTokenPortfolio memory nToken,
int256 assetCashDeposit,
uint256 blockTime
) private {
(int256[] memory depositShares, int256[] memory leverageThresholds) =
nTokenHandler.getDepositParameters(
nToken.cashGroup.currencyId,
nToken.cashGroup.maxMarketIndex
);
// Loop backwards from the last market to the first market, the reasoning is a little complicated:
// If we have to deleverage the markets (i.e. lend instead of provide liquidity) it's quite gas inefficient
// to calculate the cash amount to lend. We do know that longer term maturities will have more
// slippage and therefore the residual from the perMarketDeposit will be lower as the maturities get
// closer to the current block time. Any residual cash from lending will be rolled into shorter
// markets as this loop progresses.
int256 residualCash;
MarketParameters memory market;
for (uint256 marketIndex = nToken.cashGroup.maxMarketIndex; marketIndex > 0; marketIndex--) {
int256 fCashAmount;
// Loads values into the market memory slot
nToken.cashGroup.loadMarket(
market,
marketIndex,
true, // Needs liquidity to true
blockTime
);
// If market has not been initialized, continue. This can occur when cash groups extend maxMarketIndex
// before initializing
if (market.totalLiquidity == 0) continue;
// Checked that assetCashDeposit must be positive before entering
int256 perMarketDeposit =
assetCashDeposit
.mul(depositShares[marketIndex - 1])
.div(Constants.DEPOSIT_PERCENT_BASIS)
.add(residualCash);
(fCashAmount, residualCash) = _lendOrAddLiquidity(
nToken,
market,
perMarketDeposit,
leverageThresholds[marketIndex - 1],
marketIndex,
blockTime
);
if (fCashAmount != 0) {
BitmapAssetsHandler.addifCashAsset(
nToken.tokenAddress,
nToken.cashGroup.currencyId,
market.maturity,
nToken.lastInitializedTime,
fCashAmount
);
}
}
// nToken is allowed to store assets directly without updating account context.
nToken.portfolioState.storeAssets(nToken.tokenAddress);
// Defensive check to ensure that we do not somehow accrue negative residual cash.
require(residualCash >= 0, "Negative residual cash");
// This will occur if the three month market is over levered and we cannot lend into it
if (residualCash > 0) {
// Any remaining residual cash will be put into the nToken balance and added as liquidity on the
// next market initialization
nToken.cashBalance = nToken.cashBalance.add(residualCash);
BalanceHandler.setBalanceStorageForNToken(
nToken.tokenAddress,
nToken.cashGroup.currencyId,
nToken.cashBalance
);
}
}
/// @notice For a given amount of cash to deposit, decides how much to lend or provide
/// given the market conditions.
function _lendOrAddLiquidity(
nTokenPortfolio memory nToken,
MarketParameters memory market,
int256 perMarketDeposit,
int256 leverageThreshold,
uint256 marketIndex,
uint256 blockTime
) private returns (int256 fCashAmount, int256 residualCash) {
// We start off with the entire per market deposit as residuals
residualCash = perMarketDeposit;
// If the market is over leveraged then we will lend to it instead of providing liquidity
if (_isMarketOverLeveraged(nToken.cashGroup, market, leverageThreshold)) {
(residualCash, fCashAmount) = _deleverageMarket(
nToken.cashGroup,
market,
perMarketDeposit,
blockTime,
marketIndex
);
// Recalculate this after lending into the market, if it is still over leveraged then
// we will not add liquidity and just exit.
if (_isMarketOverLeveraged(nToken.cashGroup, market, leverageThreshold)) {
// Returns the residual cash amount
return (fCashAmount, residualCash);
}
}
// Add liquidity to the market only if we have successfully delevered.
// (marketIndex - 1) is the index of the nToken portfolio array where the asset is stored
// If deleveraged, residualCash is what remains
// If not deleveraged, residual cash is per market deposit
fCashAmount = fCashAmount.add(
_addLiquidityToMarket(nToken, market, marketIndex - 1, residualCash)
);
// No residual cash if we're adding liquidity
return (fCashAmount, 0);
}
/// @notice Markets are over levered when their proportion is greater than a governance set
/// threshold. At this point, providing liquidity will incur too much negative fCash on the nToken
/// account for the given amount of cash deposited, putting the nToken account at risk of liquidation.
/// If the market is over leveraged, we call `deleverageMarket` to lend to the market instead.
function _isMarketOverLeveraged(
CashGroupParameters memory cashGroup,
MarketParameters memory market,
int256 leverageThreshold
) private pure returns (bool) {
int256 totalCashUnderlying = cashGroup.assetRate.convertToUnderlying(market.totalAssetCash);
// Comparison we want to do:
// (totalfCash) / (totalfCash + totalCashUnderlying) > leverageThreshold
// However, the division will introduce rounding errors so we change this to:
// totalfCash * RATE_PRECISION > leverageThreshold * (totalfCash + totalCashUnderlying)
// Leverage threshold is denominated in rate precision.
return (
market.totalfCash.mul(Constants.RATE_PRECISION) >
leverageThreshold.mul(market.totalfCash.add(totalCashUnderlying))
);
}
function _addLiquidityToMarket(
nTokenPortfolio memory nToken,
MarketParameters memory market,
uint256 index,
int256 perMarketDeposit
) private returns (int256) {
// Add liquidity to the market
PortfolioAsset memory asset = nToken.portfolioState.storedAssets[index];
// We expect that all the liquidity tokens are in the portfolio in order.
require(
asset.maturity == market.maturity &&
// Ensures that the asset type references the proper liquidity token
asset.assetType == index + Constants.MIN_LIQUIDITY_TOKEN_INDEX &&
// Ensures that the storage state will not be overwritten
asset.storageState == AssetStorageState.NoChange,
"PT: invalid liquidity token"
);
// This will update the market state as well, fCashAmount returned here is negative
(int256 liquidityTokens, int256 fCashAmount) = market.addLiquidity(perMarketDeposit);
asset.notional = asset.notional.add(liquidityTokens);
asset.storageState = AssetStorageState.Update;
return fCashAmount;
}
/// @notice Lends into the market to reduce the leverage that the nToken will add liquidity at. May fail due
/// to slippage or result in some amount of residual cash.
function _deleverageMarket(
CashGroupParameters memory cashGroup,
MarketParameters memory market,
int256 perMarketDeposit,
uint256 blockTime,
uint256 marketIndex
) private returns (int256, int256) {
uint256 timeToMaturity = market.maturity.sub(blockTime);
// Shift the last implied rate by some buffer and calculate the exchange rate to fCash. Hope that this
// is sufficient to cover all potential slippage. We don't use the `getfCashGivenCashAmount` method here
// because it is very gas inefficient.
int256 assumedExchangeRate;
if (market.lastImpliedRate < Constants.DELEVERAGE_BUFFER) {
// Floor the exchange rate at zero interest rate
assumedExchangeRate = Constants.RATE_PRECISION;
} else {
assumedExchangeRate = Market.getExchangeRateFromImpliedRate(
market.lastImpliedRate.sub(Constants.DELEVERAGE_BUFFER),
timeToMaturity
);
}
int256 fCashAmount;
{
int256 perMarketDepositUnderlying =
cashGroup.assetRate.convertToUnderlying(perMarketDeposit);
// NOTE: cash * exchangeRate = fCash
fCashAmount = perMarketDepositUnderlying.mulInRatePrecision(assumedExchangeRate);
}
int256 netAssetCash = market.executeTrade(cashGroup, fCashAmount, timeToMaturity, marketIndex);
// This means that the trade failed
if (netAssetCash == 0) {
return (perMarketDeposit, 0);
} else {
// Ensure that net the per market deposit figure does not drop below zero, this should not be possible
// given how we've calculated the exchange rate but extra caution here
int256 residual = perMarketDeposit.add(netAssetCash);
require(residual >= 0); // dev: insufficient cash
return (residual, fCashAmount);
}
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../../internal/markets/Market.sol";
import "../../internal/nToken/nTokenHandler.sol";
import "../../internal/nToken/nTokenCalculations.sol";
import "../../internal/portfolio/PortfolioHandler.sol";
import "../../internal/portfolio/TransferAssets.sol";
import "../../internal/balances/BalanceHandler.sol";
import "../../math/SafeInt256.sol";
import "../../math/Bitmap.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
library nTokenRedeemAction {
using SafeInt256 for int256;
using SafeMath for uint256;
using Bitmap for bytes32;
using BalanceHandler for BalanceState;
using Market for MarketParameters;
using CashGroup for CashGroupParameters;
using PortfolioHandler for PortfolioState;
using nTokenHandler for nTokenPortfolio;
/// @notice When redeeming nTokens via the batch they must all be sold to cash and this
/// method will return the amount of asset cash sold.
/// @param currencyId the currency associated the nToken
/// @param tokensToRedeem the amount of nTokens to convert to cash
/// @return amount of asset cash to return to the account, denominated in internal token decimals
function nTokenRedeemViaBatch(uint16 currencyId, int256 tokensToRedeem)
external
returns (int256)
{
uint256 blockTime = block.timestamp;
// prettier-ignore
(
int256 totalAssetCash,
bool hasResidual,
/* PortfolioAssets[] memory newfCashAssets */
) = _redeem(currencyId, tokensToRedeem, true, false, blockTime);
require(!hasResidual, "Cannot redeem via batch, residual");
return totalAssetCash;
}
/// @notice Redeems nTokens for asset cash and fCash
/// @param currencyId the currency associated the nToken
/// @param tokensToRedeem the amount of nTokens to convert to cash
/// @param sellTokenAssets attempt to sell residual fCash and convert to cash, if unsuccessful then place
/// back into the account's portfolio
/// @param acceptResidualAssets if true, then ifCash residuals will be placed into the account and there will
/// be no penalty assessed
/// @return assetCash positive amount of asset cash to the account
/// @return hasResidual true if there are fCash residuals left
/// @return assets an array of fCash asset residuals to place into the account
function redeem(
uint16 currencyId,
int256 tokensToRedeem,
bool sellTokenAssets,
bool acceptResidualAssets
) external returns (int256, bool, PortfolioAsset[] memory) {
return _redeem(
currencyId,
tokensToRedeem,
sellTokenAssets,
acceptResidualAssets,
block.timestamp
);
}
function _redeem(
uint16 currencyId,
int256 tokensToRedeem,
bool sellTokenAssets,
bool acceptResidualAssets,
uint256 blockTime
) internal returns (int256, bool, PortfolioAsset[] memory) {
require(tokensToRedeem > 0);
nTokenPortfolio memory nToken;
nToken.loadNTokenPortfolioStateful(currencyId);
// nTokens cannot be redeemed during the period of time where they require settlement.
require(nToken.getNextSettleTime() > blockTime, "Requires settlement");
require(tokensToRedeem < nToken.totalSupply, "Cannot redeem");
PortfolioAsset[] memory newifCashAssets;
// Get the ifCash bits that are idiosyncratic
bytes32 ifCashBits = nTokenCalculations.getNTokenifCashBits(
nToken.tokenAddress,
currencyId,
nToken.lastInitializedTime,
blockTime,
nToken.cashGroup.maxMarketIndex
);
if (ifCashBits != 0 && acceptResidualAssets) {
// This will remove all the ifCash assets proportionally from the account
newifCashAssets = _reduceifCashAssetsProportional(
nToken.tokenAddress,
currencyId,
nToken.lastInitializedTime,
tokensToRedeem,
nToken.totalSupply,
ifCashBits
);
// Once the ifCash bits have been withdrawn, set this to zero so that getLiquidityTokenWithdraw
// simply gets the proportional amount of liquidity tokens to remove
ifCashBits = 0;
}
// Returns the liquidity tokens to withdraw per market and the netfCash amounts. Net fCash amounts are only
// set when ifCashBits != 0. Otherwise they must be calculated in _withdrawLiquidityTokens
(int256[] memory tokensToWithdraw, int256[] memory netfCash) = nTokenCalculations.getLiquidityTokenWithdraw(
nToken,
tokensToRedeem,
blockTime,
ifCashBits
);
// Returns the totalAssetCash as a result of withdrawing liquidity tokens and cash. netfCash will be updated
// in memory if required and will contain the fCash to be sold or returned to the portfolio
int256 totalAssetCash = _reduceLiquidAssets(
nToken,
tokensToRedeem,
tokensToWithdraw,
netfCash,
ifCashBits == 0, // If there are no residuals then we need to populate netfCash amounts
blockTime
);
bool netfCashRemaining = true;
if (sellTokenAssets) {
int256 assetCash;
// NOTE: netfCash is modified in place and set to zero if the fCash is sold
(assetCash, netfCashRemaining) = _sellfCashAssets(nToken, netfCash, blockTime);
totalAssetCash = totalAssetCash.add(assetCash);
}
if (netfCashRemaining) {
// If the account is unwilling to accept residuals then will fail here.
require(acceptResidualAssets, "Residuals");
newifCashAssets = _addResidualsToAssets(nToken.portfolioState.storedAssets, newifCashAssets, netfCash);
}
return (totalAssetCash, netfCashRemaining, newifCashAssets);
}
/// @notice Removes liquidity tokens and cash from the nToken
/// @param nToken portfolio object
/// @param nTokensToRedeem tokens to redeem
/// @param tokensToWithdraw array of liquidity tokens to withdraw
/// @param netfCash array of netfCash figures
/// @param mustCalculatefCash true if netfCash must be calculated in the removeLiquidityTokens step
/// @param blockTime current block time
/// @return assetCashShare amount of cash the redeemer will receive from withdrawing cash assets from the nToken
function _reduceLiquidAssets(
nTokenPortfolio memory nToken,
int256 nTokensToRedeem,
int256[] memory tokensToWithdraw,
int256[] memory netfCash,
bool mustCalculatefCash,
uint256 blockTime
) private returns (int256 assetCashShare) {
// Get asset cash share for the nToken, if it exists. It is required in balance handler that the
// nToken can never have a negative cash asset cash balance so what we get here is always positive
// or zero.
assetCashShare = nToken.cashBalance.mul(nTokensToRedeem).div(nToken.totalSupply);
if (assetCashShare > 0) {
nToken.cashBalance = nToken.cashBalance.subNoNeg(assetCashShare);
BalanceHandler.setBalanceStorageForNToken(
nToken.tokenAddress,
nToken.cashGroup.currencyId,
nToken.cashBalance
);
}
// Get share of liquidity tokens to remove, netfCash is modified in memory during this method if mustCalculatefcash
// is set to true
assetCashShare = assetCashShare.add(
_removeLiquidityTokens(nToken, nTokensToRedeem, tokensToWithdraw, netfCash, blockTime, mustCalculatefCash)
);
nToken.portfolioState.storeAssets(nToken.tokenAddress);
// NOTE: Token supply change will happen when we finalize balances and after minting of incentives
return assetCashShare;
}
/// @notice Removes nToken liquidity tokens and updates the netfCash figures.
/// @param nToken portfolio object
/// @param nTokensToRedeem tokens to redeem
/// @param tokensToWithdraw array of liquidity tokens to withdraw
/// @param netfCash array of netfCash figures
/// @param blockTime current block time
/// @param mustCalculatefCash true if netfCash must be calculated in the removeLiquidityTokens step
/// @return totalAssetCashClaims is the amount of asset cash raised from liquidity token cash claims
function _removeLiquidityTokens(
nTokenPortfolio memory nToken,
int256 nTokensToRedeem,
int256[] memory tokensToWithdraw,
int256[] memory netfCash,
uint256 blockTime,
bool mustCalculatefCash
) private returns (int256 totalAssetCashClaims) {
MarketParameters memory market;
for (uint256 i = 0; i < nToken.portfolioState.storedAssets.length; i++) {
PortfolioAsset memory asset = nToken.portfolioState.storedAssets[i];
asset.notional = asset.notional.sub(tokensToWithdraw[i]);
// Cannot redeem liquidity tokens down to zero or this will cause many issues with
// market initialization.
require(asset.notional > 0, "Cannot redeem to zero");
require(asset.storageState == AssetStorageState.NoChange);
asset.storageState = AssetStorageState.Update;
// This will load a market object in memory
nToken.cashGroup.loadMarket(market, i + 1, true, blockTime);
int256 fCashClaim;
{
int256 assetCash;
// Remove liquidity from the market
(assetCash, fCashClaim) = market.removeLiquidity(tokensToWithdraw[i]);
totalAssetCashClaims = totalAssetCashClaims.add(assetCash);
}
int256 fCashToNToken;
if (mustCalculatefCash) {
// Do this calculation if net ifCash is not set, will happen if there are no residuals
int256 fCashShare = BitmapAssetsHandler.getifCashNotional(
nToken.tokenAddress,
nToken.cashGroup.currencyId,
asset.maturity
);
fCashShare = fCashShare.mul(nTokensToRedeem).div(nToken.totalSupply);
// netfCash = fCashClaim + fCashShare
netfCash[i] = fCashClaim.add(fCashShare);
fCashToNToken = fCashShare.neg();
} else {
// Account will receive netfCash amount. Deduct that from the fCash claim and add the
// remaining back to the nToken to net off the nToken's position
// fCashToNToken = -fCashShare
// netfCash = fCashClaim + fCashShare
// fCashToNToken = -(netfCash - fCashClaim)
// fCashToNToken = fCashClaim - netfCash
fCashToNToken = fCashClaim.sub(netfCash[i]);
}
// Removes the account's fCash position from the nToken
BitmapAssetsHandler.addifCashAsset(
nToken.tokenAddress,
asset.currencyId,
asset.maturity,
nToken.lastInitializedTime,
fCashToNToken
);
}
return totalAssetCashClaims;
}
/// @notice Sells fCash assets back into the market for cash. Negative fCash assets will decrease netAssetCash
/// as a result. The aim here is to ensure that accounts can redeem nTokens without having to take on
/// fCash assets.
function _sellfCashAssets(
nTokenPortfolio memory nToken,
int256[] memory netfCash,
uint256 blockTime
) private returns (int256 totalAssetCash, bool hasResidual) {
MarketParameters memory market;
hasResidual = false;
for (uint256 i = 0; i < netfCash.length; i++) {
if (netfCash[i] == 0) continue;
nToken.cashGroup.loadMarket(market, i + 1, false, blockTime);
int256 netAssetCash = market.executeTrade(
nToken.cashGroup,
// Use the negative of fCash notional here since we want to net it out
netfCash[i].neg(),
nToken.portfolioState.storedAssets[i].maturity.sub(blockTime),
i + 1
);
if (netAssetCash == 0) {
// This means that the trade failed
hasResidual = true;
} else {
totalAssetCash = totalAssetCash.add(netAssetCash);
netfCash[i] = 0;
}
}
}
/// @notice Combines newifCashAssets array with netfCash assets into a single finalfCashAssets array
function _addResidualsToAssets(
PortfolioAsset[] memory liquidityTokens,
PortfolioAsset[] memory newifCashAssets,
int256[] memory netfCash
) internal pure returns (PortfolioAsset[] memory finalfCashAssets) {
uint256 numAssetsToExtend;
for (uint256 i = 0; i < netfCash.length; i++) {
if (netfCash[i] != 0) numAssetsToExtend++;
}
uint256 newLength = newifCashAssets.length + numAssetsToExtend;
finalfCashAssets = new PortfolioAsset[](newLength);
uint index = 0;
for (; index < newifCashAssets.length; index++) {
finalfCashAssets[index] = newifCashAssets[index];
}
uint netfCashIndex = 0;
for (; index < finalfCashAssets.length; ) {
if (netfCash[netfCashIndex] != 0) {
PortfolioAsset memory asset = finalfCashAssets[index];
asset.currencyId = liquidityTokens[netfCashIndex].currencyId;
asset.maturity = liquidityTokens[netfCashIndex].maturity;
asset.assetType = Constants.FCASH_ASSET_TYPE;
asset.notional = netfCash[netfCashIndex];
index++;
}
netfCashIndex++;
}
return finalfCashAssets;
}
/// @notice Used to reduce an nToken ifCash assets portfolio proportionately when redeeming
/// nTokens to its underlying assets.
function _reduceifCashAssetsProportional(
address account,
uint256 currencyId,
uint256 lastInitializedTime,
int256 tokensToRedeem,
int256 totalSupply,
bytes32 assetsBitmap
) internal returns (PortfolioAsset[] memory) {
uint256 index = assetsBitmap.totalBitsSet();
mapping(address => mapping(uint256 =>
mapping(uint256 => ifCashStorage))) storage store = LibStorage.getifCashBitmapStorage();
PortfolioAsset[] memory assets = new PortfolioAsset[](index);
index = 0;
uint256 bitNum = assetsBitmap.getNextBitNum();
while (bitNum != 0) {
uint256 maturity = DateTime.getMaturityFromBitNum(lastInitializedTime, bitNum);
ifCashStorage storage fCashSlot = store[account][currencyId][maturity];
int256 notional = fCashSlot.notional;
int256 notionalToTransfer = notional.mul(tokensToRedeem).div(totalSupply);
int256 finalNotional = notional.sub(notionalToTransfer);
require(type(int128).min <= finalNotional && finalNotional <= type(int128).max); // dev: bitmap notional overflow
fCashSlot.notional = int128(finalNotional);
PortfolioAsset memory asset = assets[index];
asset.currencyId = currencyId;
asset.maturity = maturity;
asset.assetType = Constants.FCASH_ASSET_TYPE;
asset.notional = notionalToTransfer;
index += 1;
// Turn off the bit and look for the next one
assetsBitmap = assetsBitmap.setBit(bitNum, false);
bitNum = assetsBitmap.getNextBitNum();
}
return assets;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../internal/portfolio/PortfolioHandler.sol";
import "../internal/balances/BalanceHandler.sol";
import "../internal/settlement/SettlePortfolioAssets.sol";
import "../internal/settlement/SettleBitmapAssets.sol";
import "../internal/AccountContextHandler.sol";
/// @notice External library for settling assets
library SettleAssetsExternal {
using PortfolioHandler for PortfolioState;
using AccountContextHandler for AccountContext;
event AccountSettled(address indexed account);
/// @notice Settles an account, returns the new account context object after settlement.
/// @dev The memory location of the account context object is not the same as the one returned.
function settleAccount(
address account,
AccountContext memory accountContext
) external returns (AccountContext memory) {
// Defensive check to ensure that this is a valid settlement
require(accountContext.mustSettleAssets());
SettleAmount[] memory settleAmounts;
PortfolioState memory portfolioState;
if (accountContext.isBitmapEnabled()) {
(int256 settledCash, uint256 blockTimeUTC0) =
SettleBitmapAssets.settleBitmappedCashGroup(
account,
accountContext.bitmapCurrencyId,
accountContext.nextSettleTime,
block.timestamp
);
require(blockTimeUTC0 < type(uint40).max); // dev: block time utc0 overflow
accountContext.nextSettleTime = uint40(blockTimeUTC0);
settleAmounts = new SettleAmount[](1);
settleAmounts[0] = SettleAmount(accountContext.bitmapCurrencyId, settledCash);
} else {
portfolioState = PortfolioHandler.buildPortfolioState(
account,
accountContext.assetArrayLength,
0
);
settleAmounts = SettlePortfolioAssets.settlePortfolio(portfolioState, block.timestamp);
accountContext.storeAssetsAndUpdateContext(account, portfolioState, false);
}
BalanceHandler.finalizeSettleAmounts(account, accountContext, settleAmounts);
emit AccountSettled(account);
return accountContext;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../external/SettleAssetsExternal.sol";
import "../internal/AccountContextHandler.sol";
import "../internal/valuation/FreeCollateral.sol";
/// @title Externally deployed library for free collateral calculations
library FreeCollateralExternal {
using AccountContextHandler for AccountContext;
/// @notice Returns the ETH denominated free collateral of an account, represents the amount of
/// debt that the account can incur before liquidation. If an account's assets need to be settled this
/// will revert, either settle the account or use the off chain SDK to calculate free collateral.
/// @dev Called via the Views.sol method to return an account's free collateral. Does not work
/// for the nToken, the nToken does not have an account context.
/// @param account account to calculate free collateral for
/// @return total free collateral in ETH w/ 8 decimal places
/// @return array of net local values in asset values ordered by currency id
function getFreeCollateralView(address account)
external
view
returns (int256, int256[] memory)
{
AccountContext memory accountContext = AccountContextHandler.getAccountContext(account);
// The internal free collateral function does not account for settled assets. The Notional SDK
// can calculate the free collateral off chain if required at this point.
require(!accountContext.mustSettleAssets(), "Assets not settled");
return FreeCollateral.getFreeCollateralView(account, accountContext, block.timestamp);
}
/// @notice Calculates free collateral and will revert if it falls below zero. If the account context
/// must be updated due to changes in debt settings, will update. Cannot check free collateral if assets
/// need to be settled first.
/// @dev Cannot be called directly by users, used during various actions that require an FC check. Must be
/// called before the end of any transaction for accounts where FC can decrease.
/// @param account account to calculate free collateral for
function checkFreeCollateralAndRevert(address account) external {
AccountContext memory accountContext = AccountContextHandler.getAccountContext(account);
require(!accountContext.mustSettleAssets(), "Assets not settled");
(int256 ethDenominatedFC, bool updateContext) =
FreeCollateral.getFreeCollateralStateful(account, accountContext, block.timestamp);
if (updateContext) {
accountContext.setAccountContext(account);
}
require(ethDenominatedFC >= 0, "Insufficient free collateral");
}
/// @notice Calculates liquidation factors for an account
/// @dev Only called internally by liquidation actions, does some initial validation of currencies. If a currency is
/// specified that the account does not have, a asset available figure of zero will be returned. If this is the case then
/// liquidation actions will revert.
/// @dev an ntoken account will return 0 FC and revert if called
/// @param account account to liquidate
/// @param localCurrencyId currency that the debts are denominated in
/// @param collateralCurrencyId collateral currency to liquidate against, set to zero in the case of local currency liquidation
/// @return accountContext the accountContext of the liquidated account
/// @return factors struct of relevant factors for liquidation
/// @return portfolio the portfolio array of the account (bitmap accounts will return an empty array)
function getLiquidationFactors(
address account,
uint256 localCurrencyId,
uint256 collateralCurrencyId
)
external
returns (
AccountContext memory accountContext,
LiquidationFactors memory factors,
PortfolioAsset[] memory portfolio
)
{
accountContext = AccountContextHandler.getAccountContext(account);
if (accountContext.mustSettleAssets()) {
accountContext = SettleAssetsExternal.settleAccount(account, accountContext);
}
if (accountContext.isBitmapEnabled()) {
// A bitmap currency can only ever hold debt in this currency
require(localCurrencyId == accountContext.bitmapCurrencyId);
}
(factors, portfolio) = FreeCollateral.getLiquidationFactors(
account,
accountContext,
block.timestamp,
localCurrencyId,
collateralCurrencyId
);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
import "../global/Constants.sol";
library SafeInt256 {
int256 private constant _INT256_MIN = type(int256).min;
/// @dev Returns the multiplication of two signed integers, reverting on
/// overflow.
/// Counterpart to Solidity's `*` operator.
/// Requirements:
/// - Multiplication cannot overflow.
function mul(int256 a, int256 b) internal pure returns (int256 c) {
c = a * b;
if (a == -1) require (b == 0 || c / b == a);
else require (a == 0 || c / a == b);
}
/// @dev Returns the integer division of two signed integers. Reverts on
/// division by zero. The result is rounded towards zero.
/// Counterpart to Solidity's `/` operator. Note: this function uses a
/// `revert` opcode (which leaves remaining gas untouched) while Solidity
/// uses an invalid opcode to revert (consuming all remaining gas).
/// Requirements:
/// - The divisor cannot be zero.
function div(int256 a, int256 b) internal pure returns (int256 c) {
require(!(b == -1 && a == _INT256_MIN)); // dev: int256 div overflow
// NOTE: solidity will automatically revert on divide by zero
c = a / b;
}
function sub(int256 x, int256 y) internal pure returns (int256 z) {
// taken from uniswap v3
require((z = x - y) <= x == (y >= 0));
}
function add(int256 x, int256 y) internal pure returns (int256 z) {
require((z = x + y) >= x == (y >= 0));
}
function neg(int256 x) internal pure returns (int256 y) {
return mul(-1, x);
}
function abs(int256 x) internal pure returns (int256) {
if (x < 0) return neg(x);
else return x;
}
function subNoNeg(int256 x, int256 y) internal pure returns (int256 z) {
z = sub(x, y);
require(z >= 0); // dev: int256 sub to negative
return z;
}
/// @dev Calculates x * RATE_PRECISION / y while checking overflows
function divInRatePrecision(int256 x, int256 y) internal pure returns (int256) {
return div(mul(x, Constants.RATE_PRECISION), y);
}
/// @dev Calculates x * y / RATE_PRECISION while checking overflows
function mulInRatePrecision(int256 x, int256 y) internal pure returns (int256) {
return div(mul(x, y), Constants.RATE_PRECISION);
}
function toUint(int256 x) internal pure returns (uint256) {
require(x >= 0);
return uint256(x);
}
function toInt(uint256 x) internal pure returns (int256) {
require (x <= uint256(type(int256).max)); // dev: toInt overflow
return int256(x);
}
function max(int256 x, int256 y) internal pure returns (int256) {
return x > y ? x : y;
}
function min(int256 x, int256 y) internal pure returns (int256) {
return x < y ? x : y;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "./Types.sol";
/**
* @notice Storage layout for the system. Do not change this file once deployed, future storage
* layouts must inherit this and increment the version number.
*/
contract StorageLayoutV1 {
// The current maximum currency id
uint16 internal maxCurrencyId;
// Sets the state of liquidations being enabled during a paused state. Each of the four lower
// bits can be turned on to represent one of the liquidation types being enabled.
bytes1 internal liquidationEnabledState;
// Set to true once the system has been initialized
bool internal hasInitialized;
/* Authentication Mappings */
// This is set to the timelock contract to execute governance functions
address public owner;
// This is set to an address of a router that can only call governance actions
address public pauseRouter;
// This is set to an address of a router that can only call governance actions
address public pauseGuardian;
// On upgrades this is set in the case that the pause router is used to pass the rollback check
address internal rollbackRouterImplementation;
// A blanket allowance for a spender to transfer any of an account's nTokens. This would allow a user
// to set an allowance on all nTokens for a particular integrating contract system.
// owner => spender => transferAllowance
mapping(address => mapping(address => uint256)) internal nTokenWhitelist;
// Individual transfer allowances for nTokens used for ERC20
// owner => spender => currencyId => transferAllowance
mapping(address => mapping(address => mapping(uint16 => uint256))) internal nTokenAllowance;
// Transfer operators
// Mapping from a global ERC1155 transfer operator contract to an approval value for it
mapping(address => bool) internal globalTransferOperator;
// Mapping from an account => operator => approval status for that operator. This is a specific
// approval between two addresses for ERC1155 transfers.
mapping(address => mapping(address => bool)) internal accountAuthorizedTransferOperator;
// Approval for a specific contract to use the `batchBalanceAndTradeActionWithCallback` method in
// BatchAction.sol, can only be set by governance
mapping(address => bool) internal authorizedCallbackContract;
// Reverse mapping from token addresses to currency ids, only used for referencing in views
// and checking for duplicate token listings.
mapping(address => uint16) internal tokenAddressToCurrencyId;
// Reentrancy guard
uint256 internal reentrancyStatus;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "./Incentives.sol";
import "./TokenHandler.sol";
import "../AccountContextHandler.sol";
import "../../global/Types.sol";
import "../../global/Constants.sol";
import "../../math/SafeInt256.sol";
import "../../math/FloatingPoint56.sol";
library BalanceHandler {
using SafeInt256 for int256;
using TokenHandler for Token;
using AssetRate for AssetRateParameters;
using AccountContextHandler for AccountContext;
/// @notice Emitted when a cash balance changes
event CashBalanceChange(address indexed account, uint16 indexed currencyId, int256 netCashChange);
/// @notice Emitted when nToken supply changes (not the same as transfers)
event nTokenSupplyChange(address indexed account, uint16 indexed currencyId, int256 tokenSupplyChange);
/// @notice Emitted when reserve fees are accrued
event ReserveFeeAccrued(uint16 indexed currencyId, int256 fee);
/// @notice Emitted when reserve balance is updated
event ReserveBalanceUpdated(uint16 indexed currencyId, int256 newBalance);
/// @notice Emitted when reserve balance is harvested
event ExcessReserveBalanceHarvested(uint16 indexed currencyId, int256 harvestAmount);
/// @notice Deposits asset tokens into an account
/// @dev Handles two special cases when depositing tokens into an account.
/// - If a token has transfer fees then the amount specified does not equal the amount that the contract
/// will receive. Complete the deposit here rather than in finalize so that the contract has the correct
/// balance to work with.
/// - Force a transfer before finalize to allow a different account to deposit into an account
/// @return assetAmountInternal which is the converted asset amount accounting for transfer fees
function depositAssetToken(
BalanceState memory balanceState,
address account,
int256 assetAmountExternal,
bool forceTransfer
) internal returns (int256 assetAmountInternal) {
if (assetAmountExternal == 0) return 0;
require(assetAmountExternal > 0); // dev: deposit asset token amount negative
Token memory token = TokenHandler.getAssetToken(balanceState.currencyId);
if (token.tokenType == TokenType.aToken) {
// Handles special accounting requirements for aTokens
assetAmountExternal = AaveHandler.convertToScaledBalanceExternal(
balanceState.currencyId,
assetAmountExternal
);
}
// Force transfer is used to complete the transfer before going to finalize
if (token.hasTransferFee || forceTransfer) {
// If the token has a transfer fee the deposit amount may not equal the actual amount
// that the contract will receive. We handle the deposit here and then update the netCashChange
// accordingly which is denominated in internal precision.
int256 assetAmountExternalPrecisionFinal = token.transfer(account, balanceState.currencyId, assetAmountExternal);
// Convert the external precision to internal, it's possible that we lose dust amounts here but
// this is unavoidable because we do not know how transfer fees are calculated.
assetAmountInternal = token.convertToInternal(assetAmountExternalPrecisionFinal);
// Transfer has been called
balanceState.netCashChange = balanceState.netCashChange.add(assetAmountInternal);
return assetAmountInternal;
} else {
assetAmountInternal = token.convertToInternal(assetAmountExternal);
// Otherwise add the asset amount here. It may be net off later and we want to only do
// a single transfer during the finalize method. Use internal precision to ensure that internal accounting
// and external account remain in sync.
// Transfer will be deferred
balanceState.netAssetTransferInternalPrecision = balanceState
.netAssetTransferInternalPrecision
.add(assetAmountInternal);
// Returns the converted assetAmountExternal to the internal amount
return assetAmountInternal;
}
}
/// @notice Handle deposits of the underlying token
/// @dev In this case we must wrap the underlying token into an asset token, ensuring that we do not end up
/// with any underlying tokens left as dust on the contract.
function depositUnderlyingToken(
BalanceState memory balanceState,
address account,
int256 underlyingAmountExternal
) internal returns (int256) {
if (underlyingAmountExternal == 0) return 0;
require(underlyingAmountExternal > 0); // dev: deposit underlying token negative
Token memory underlyingToken = TokenHandler.getUnderlyingToken(balanceState.currencyId);
// This is the exact amount of underlying tokens the account has in external precision.
if (underlyingToken.tokenType == TokenType.Ether) {
// Underflow checked above
require(uint256(underlyingAmountExternal) == msg.value, "ETH Balance");
} else {
underlyingAmountExternal = underlyingToken.transfer(account, balanceState.currencyId, underlyingAmountExternal);
}
Token memory assetToken = TokenHandler.getAssetToken(balanceState.currencyId);
int256 assetTokensReceivedExternalPrecision =
assetToken.mint(balanceState.currencyId, SafeInt256.toUint(underlyingAmountExternal));
// cTokens match INTERNAL_TOKEN_PRECISION so this will short circuit but we leave this here in case a different
// type of asset token is listed in the future. It's possible if those tokens have a different precision dust may
// accrue but that is not relevant now.
int256 assetTokensReceivedInternal =
assetToken.convertToInternal(assetTokensReceivedExternalPrecision);
// Transfer / mint has taken effect
balanceState.netCashChange = balanceState.netCashChange.add(assetTokensReceivedInternal);
return assetTokensReceivedInternal;
}
/// @notice Finalizes an account's balances, handling any transfer logic required
/// @dev This method SHOULD NOT be used for nToken accounts, for that use setBalanceStorageForNToken
/// as the nToken is limited in what types of balances it can hold.
function finalize(
BalanceState memory balanceState,
address account,
AccountContext memory accountContext,
bool redeemToUnderlying
) internal returns (int256 transferAmountExternal) {
bool mustUpdate;
if (balanceState.netNTokenTransfer < 0) {
require(
balanceState.storedNTokenBalance
.add(balanceState.netNTokenSupplyChange)
.add(balanceState.netNTokenTransfer) >= 0,
"Neg nToken"
);
}
if (balanceState.netAssetTransferInternalPrecision < 0) {
require(
balanceState.storedCashBalance
.add(balanceState.netCashChange)
.add(balanceState.netAssetTransferInternalPrecision) >= 0,
"Neg Cash"
);
}
// Transfer amount is checked inside finalize transfers in case when converting to external we
// round down to zero. This returns the actual net transfer in internal precision as well.
(
transferAmountExternal,
balanceState.netAssetTransferInternalPrecision
) = _finalizeTransfers(balanceState, account, redeemToUnderlying);
// No changes to total cash after this point
int256 totalCashChange = balanceState.netCashChange.add(balanceState.netAssetTransferInternalPrecision);
if (totalCashChange != 0) {
balanceState.storedCashBalance = balanceState.storedCashBalance.add(totalCashChange);
mustUpdate = true;
emit CashBalanceChange(
account,
uint16(balanceState.currencyId),
totalCashChange
);
}
if (balanceState.netNTokenTransfer != 0 || balanceState.netNTokenSupplyChange != 0) {
// Final nToken balance is used to calculate the account incentive debt
int256 finalNTokenBalance = balanceState.storedNTokenBalance
.add(balanceState.netNTokenTransfer)
.add(balanceState.netNTokenSupplyChange);
// The toUint() call here will ensure that nToken balances never become negative
Incentives.claimIncentives(balanceState, account, finalNTokenBalance.toUint());
balanceState.storedNTokenBalance = finalNTokenBalance;
if (balanceState.netNTokenSupplyChange != 0) {
emit nTokenSupplyChange(
account,
uint16(balanceState.currencyId),
balanceState.netNTokenSupplyChange
);
}
mustUpdate = true;
}
if (mustUpdate) {
_setBalanceStorage(
account,
balanceState.currencyId,
balanceState.storedCashBalance,
balanceState.storedNTokenBalance,
balanceState.lastClaimTime,
balanceState.accountIncentiveDebt
);
}
accountContext.setActiveCurrency(
balanceState.currencyId,
// Set active currency to true if either balance is non-zero
balanceState.storedCashBalance != 0 || balanceState.storedNTokenBalance != 0,
Constants.ACTIVE_IN_BALANCES
);
if (balanceState.storedCashBalance < 0) {
// NOTE: HAS_CASH_DEBT cannot be extinguished except by a free collateral check where all balances
// are examined
accountContext.hasDebt = accountContext.hasDebt | Constants.HAS_CASH_DEBT;
}
}
/// @dev Returns the amount transferred in underlying or asset terms depending on how redeem to underlying
/// is specified.
function _finalizeTransfers(
BalanceState memory balanceState,
address account,
bool redeemToUnderlying
) private returns (int256 actualTransferAmountExternal, int256 assetTransferAmountInternal) {
Token memory assetToken = TokenHandler.getAssetToken(balanceState.currencyId);
// Dust accrual to the protocol is possible if the token decimals is less than internal token precision.
// See the comments in TokenHandler.convertToExternal and TokenHandler.convertToInternal
int256 assetTransferAmountExternal =
assetToken.convertToExternal(balanceState.netAssetTransferInternalPrecision);
if (assetTransferAmountExternal == 0) {
return (0, 0);
} else if (redeemToUnderlying && assetTransferAmountExternal < 0) {
// We only do the redeem to underlying if the asset transfer amount is less than zero. If it is greater than
// zero then we will do a normal transfer instead.
// We use the internal amount here and then scale it to the external amount so that there is
// no loss of precision between our internal accounting and the external account. In this case
// there will be no dust accrual in underlying tokens since we will transfer the exact amount
// of underlying that was received.
actualTransferAmountExternal = assetToken.redeem(
balanceState.currencyId,
account,
// No overflow, checked above
uint256(assetTransferAmountExternal.neg())
);
// In this case we're transferring underlying tokens, we want to convert the internal
// asset transfer amount to store in cash balances
assetTransferAmountInternal = assetToken.convertToInternal(assetTransferAmountExternal);
} else {
// NOTE: in the case of aTokens assetTransferAmountExternal is the scaledBalanceOf in external precision, it
// will be converted to balanceOf denomination inside transfer
actualTransferAmountExternal = assetToken.transfer(account, balanceState.currencyId, assetTransferAmountExternal);
// Convert the actual transferred amount
assetTransferAmountInternal = assetToken.convertToInternal(actualTransferAmountExternal);
}
}
/// @notice Special method for settling negative current cash debts. This occurs when an account
/// has a negative fCash balance settle to cash. A settler may come and force the account to borrow
/// at the prevailing 3 month rate
/// @dev Use this method to avoid any nToken and transfer logic in finalize which is unnecessary.
function setBalanceStorageForSettleCashDebt(
address account,
CashGroupParameters memory cashGroup,
int256 amountToSettleAsset,
AccountContext memory accountContext
) internal returns (int256) {
require(amountToSettleAsset >= 0); // dev: amount to settle negative
(int256 cashBalance, int256 nTokenBalance, uint256 lastClaimTime, uint256 accountIncentiveDebt) =
getBalanceStorage(account, cashGroup.currencyId);
// Prevents settlement of positive balances
require(cashBalance < 0, "Invalid settle balance");
if (amountToSettleAsset == 0) {
// Symbolizes that the entire debt should be settled
amountToSettleAsset = cashBalance.neg();
cashBalance = 0;
} else {
// A partial settlement of the debt
require(amountToSettleAsset <= cashBalance.neg(), "Invalid amount to settle");
cashBalance = cashBalance.add(amountToSettleAsset);
}
// NOTE: we do not update HAS_CASH_DEBT here because it is possible that the other balances
// also have cash debts
if (cashBalance == 0 && nTokenBalance == 0) {
accountContext.setActiveCurrency(
cashGroup.currencyId,
false,
Constants.ACTIVE_IN_BALANCES
);
}
_setBalanceStorage(
account,
cashGroup.currencyId,
cashBalance,
nTokenBalance,
lastClaimTime,
accountIncentiveDebt
);
// Emit the event here, we do not call finalize
emit CashBalanceChange(account, cashGroup.currencyId, amountToSettleAsset);
return amountToSettleAsset;
}
/**
* @notice A special balance storage method for fCash liquidation to reduce the bytecode size.
*/
function setBalanceStorageForfCashLiquidation(
address account,
AccountContext memory accountContext,
uint16 currencyId,
int256 netCashChange
) internal {
(int256 cashBalance, int256 nTokenBalance, uint256 lastClaimTime, uint256 accountIncentiveDebt) =
getBalanceStorage(account, currencyId);
int256 newCashBalance = cashBalance.add(netCashChange);
// If a cash balance is negative already we cannot put an account further into debt. In this case
// the netCashChange must be positive so that it is coming out of debt.
if (newCashBalance < 0) {
require(netCashChange > 0, "Neg Cash");
// NOTE: HAS_CASH_DEBT cannot be extinguished except by a free collateral check
// where all balances are examined. In this case the has cash debt flag should
// already be set (cash balances cannot get more negative) but we do it again
// here just to be safe.
accountContext.hasDebt = accountContext.hasDebt | Constants.HAS_CASH_DEBT;
}
bool isActive = newCashBalance != 0 || nTokenBalance != 0;
accountContext.setActiveCurrency(currencyId, isActive, Constants.ACTIVE_IN_BALANCES);
// Emit the event here, we do not call finalize
emit CashBalanceChange(account, currencyId, netCashChange);
_setBalanceStorage(
account,
currencyId,
newCashBalance,
nTokenBalance,
lastClaimTime,
accountIncentiveDebt
);
}
/// @notice Helper method for settling the output of the SettleAssets method
function finalizeSettleAmounts(
address account,
AccountContext memory accountContext,
SettleAmount[] memory settleAmounts
) internal {
for (uint256 i = 0; i < settleAmounts.length; i++) {
SettleAmount memory amt = settleAmounts[i];
if (amt.netCashChange == 0) continue;
(
int256 cashBalance,
int256 nTokenBalance,
uint256 lastClaimTime,
uint256 accountIncentiveDebt
) = getBalanceStorage(account, amt.currencyId);
cashBalance = cashBalance.add(amt.netCashChange);
accountContext.setActiveCurrency(
amt.currencyId,
cashBalance != 0 || nTokenBalance != 0,
Constants.ACTIVE_IN_BALANCES
);
if (cashBalance < 0) {
accountContext.hasDebt = accountContext.hasDebt | Constants.HAS_CASH_DEBT;
}
emit CashBalanceChange(
account,
uint16(amt.currencyId),
amt.netCashChange
);
_setBalanceStorage(
account,
amt.currencyId,
cashBalance,
nTokenBalance,
lastClaimTime,
accountIncentiveDebt
);
}
}
/// @notice Special method for setting balance storage for nToken
function setBalanceStorageForNToken(
address nTokenAddress,
uint256 currencyId,
int256 cashBalance
) internal {
require(cashBalance >= 0); // dev: invalid nToken cash balance
_setBalanceStorage(nTokenAddress, currencyId, cashBalance, 0, 0, 0);
}
/// @notice increments fees to the reserve
function incrementFeeToReserve(uint256 currencyId, int256 fee) internal {
require(fee >= 0); // dev: invalid fee
// prettier-ignore
(int256 totalReserve, /* */, /* */, /* */) = getBalanceStorage(Constants.RESERVE, currencyId);
totalReserve = totalReserve.add(fee);
_setBalanceStorage(Constants.RESERVE, currencyId, totalReserve, 0, 0, 0);
emit ReserveFeeAccrued(uint16(currencyId), fee);
}
/// @notice harvests excess reserve balance
function harvestExcessReserveBalance(uint16 currencyId, int256 reserve, int256 assetInternalRedeemAmount) internal {
// parameters are validated by the caller
reserve = reserve.subNoNeg(assetInternalRedeemAmount);
_setBalanceStorage(Constants.RESERVE, currencyId, reserve, 0, 0, 0);
emit ExcessReserveBalanceHarvested(currencyId, assetInternalRedeemAmount);
}
/// @notice sets the reserve balance, see TreasuryAction.setReserveCashBalance
function setReserveCashBalance(uint16 currencyId, int256 newBalance) internal {
require(newBalance >= 0); // dev: invalid balance
_setBalanceStorage(Constants.RESERVE, currencyId, newBalance, 0, 0, 0);
emit ReserveBalanceUpdated(currencyId, newBalance);
}
/// @notice Sets internal balance storage.
function _setBalanceStorage(
address account,
uint256 currencyId,
int256 cashBalance,
int256 nTokenBalance,
uint256 lastClaimTime,
uint256 accountIncentiveDebt
) private {
mapping(address => mapping(uint256 => BalanceStorage)) storage store = LibStorage.getBalanceStorage();
BalanceStorage storage balanceStorage = store[account][currencyId];
require(cashBalance >= type(int88).min && cashBalance <= type(int88).max); // dev: stored cash balance overflow
// Allows for 12 quadrillion nToken balance in 1e8 decimals before overflow
require(nTokenBalance >= 0 && nTokenBalance <= type(uint80).max); // dev: stored nToken balance overflow
if (lastClaimTime == 0) {
// In this case the account has migrated and we set the accountIncentiveDebt
// The maximum NOTE supply is 100_000_000e8 (1e16) which is less than 2^56 (7.2e16) so we should never
// encounter an overflow for accountIncentiveDebt
require(accountIncentiveDebt <= type(uint56).max); // dev: account incentive debt overflow
balanceStorage.accountIncentiveDebt = uint56(accountIncentiveDebt);
} else {
// In this case the last claim time has not changed and we do not update the last integral supply
// (stored in the accountIncentiveDebt position)
require(lastClaimTime == balanceStorage.lastClaimTime);
}
balanceStorage.lastClaimTime = uint32(lastClaimTime);
balanceStorage.nTokenBalance = uint80(nTokenBalance);
balanceStorage.cashBalance = int88(cashBalance);
}
/// @notice Gets internal balance storage, nTokens are stored alongside cash balances
function getBalanceStorage(address account, uint256 currencyId)
internal
view
returns (
int256 cashBalance,
int256 nTokenBalance,
uint256 lastClaimTime,
uint256 accountIncentiveDebt
)
{
mapping(address => mapping(uint256 => BalanceStorage)) storage store = LibStorage.getBalanceStorage();
BalanceStorage storage balanceStorage = store[account][currencyId];
nTokenBalance = balanceStorage.nTokenBalance;
lastClaimTime = balanceStorage.lastClaimTime;
if (lastClaimTime > 0) {
// NOTE: this is only necessary to support the deprecated integral supply values, which are stored
// in the accountIncentiveDebt slot
accountIncentiveDebt = FloatingPoint56.unpackFrom56Bits(balanceStorage.accountIncentiveDebt);
} else {
accountIncentiveDebt = balanceStorage.accountIncentiveDebt;
}
cashBalance = balanceStorage.cashBalance;
}
/// @notice Loads a balance state memory object
/// @dev Balance state objects occupy a lot of memory slots, so this method allows
/// us to reuse them if possible
function loadBalanceState(
BalanceState memory balanceState,
address account,
uint16 currencyId,
AccountContext memory accountContext
) internal view {
require(0 < currencyId && currencyId <= Constants.MAX_CURRENCIES); // dev: invalid currency id
balanceState.currencyId = currencyId;
if (accountContext.isActiveInBalances(currencyId)) {
(
balanceState.storedCashBalance,
balanceState.storedNTokenBalance,
balanceState.lastClaimTime,
balanceState.accountIncentiveDebt
) = getBalanceStorage(account, currencyId);
} else {
balanceState.storedCashBalance = 0;
balanceState.storedNTokenBalance = 0;
balanceState.lastClaimTime = 0;
balanceState.accountIncentiveDebt = 0;
}
balanceState.netCashChange = 0;
balanceState.netAssetTransferInternalPrecision = 0;
balanceState.netNTokenTransfer = 0;
balanceState.netNTokenSupplyChange = 0;
}
/// @notice Used when manually claiming incentives in nTokenAction. Also sets the balance state
/// to storage to update the accountIncentiveDebt. lastClaimTime will be set to zero as accounts
/// are migrated to the new incentive calculation
function claimIncentivesManual(BalanceState memory balanceState, address account)
internal
returns (uint256 incentivesClaimed)
{
incentivesClaimed = Incentives.claimIncentives(
balanceState,
account,
balanceState.storedNTokenBalance.toUint()
);
_setBalanceStorage(
account,
balanceState.currencyId,
balanceState.storedCashBalance,
balanceState.storedNTokenBalance,
balanceState.lastClaimTime,
balanceState.accountIncentiveDebt
);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "./TransferAssets.sol";
import "../valuation/AssetHandler.sol";
import "../../math/SafeInt256.sol";
import "../../global/LibStorage.sol";
/// @notice Handles the management of an array of assets including reading from storage, inserting
/// updating, deleting and writing back to storage.
library PortfolioHandler {
using SafeInt256 for int256;
using AssetHandler for PortfolioAsset;
// Mirror of LibStorage.MAX_PORTFOLIO_ASSETS
uint256 private constant MAX_PORTFOLIO_ASSETS = 16;
/// @notice Primarily used by the TransferAssets library
function addMultipleAssets(PortfolioState memory portfolioState, PortfolioAsset[] memory assets)
internal
pure
{
for (uint256 i = 0; i < assets.length; i++) {
PortfolioAsset memory asset = assets[i];
if (asset.notional == 0) continue;
addAsset(
portfolioState,
asset.currencyId,
asset.maturity,
asset.assetType,
asset.notional
);
}
}
function _mergeAssetIntoArray(
PortfolioAsset[] memory assetArray,
uint256 currencyId,
uint256 maturity,
uint256 assetType,
int256 notional
) private pure returns (bool) {
for (uint256 i = 0; i < assetArray.length; i++) {
PortfolioAsset memory asset = assetArray[i];
if (
asset.assetType != assetType ||
asset.currencyId != currencyId ||
asset.maturity != maturity
) continue;
// Either of these storage states mean that some error in logic has occurred, we cannot
// store this portfolio
require(
asset.storageState != AssetStorageState.Delete &&
asset.storageState != AssetStorageState.RevertIfStored
); // dev: portfolio handler deleted storage
int256 newNotional = asset.notional.add(notional);
// Liquidity tokens cannot be reduced below zero.
if (AssetHandler.isLiquidityToken(assetType)) {
require(newNotional >= 0); // dev: portfolio handler negative liquidity token balance
}
require(newNotional >= type(int88).min && newNotional <= type(int88).max); // dev: portfolio handler notional overflow
asset.notional = newNotional;
asset.storageState = AssetStorageState.Update;
return true;
}
return false;
}
/// @notice Adds an asset to a portfolio state in memory (does not write to storage)
/// @dev Ensures that only one version of an asset exists in a portfolio (i.e. does not allow two fCash assets of the same maturity
/// to exist in a single portfolio). Also ensures that liquidity tokens do not have a negative notional.
function addAsset(
PortfolioState memory portfolioState,
uint256 currencyId,
uint256 maturity,
uint256 assetType,
int256 notional
) internal pure {
if (
// Will return true if merged
_mergeAssetIntoArray(
portfolioState.storedAssets,
currencyId,
maturity,
assetType,
notional
)
) return;
if (portfolioState.lastNewAssetIndex > 0) {
bool merged = _mergeAssetIntoArray(
portfolioState.newAssets,
currencyId,
maturity,
assetType,
notional
);
if (merged) return;
}
// At this point if we have not merged the asset then append to the array
// Cannot remove liquidity that the portfolio does not have
if (AssetHandler.isLiquidityToken(assetType)) {
require(notional >= 0); // dev: portfolio handler negative liquidity token balance
}
require(notional >= type(int88).min && notional <= type(int88).max); // dev: portfolio handler notional overflow
// Need to provision a new array at this point
if (portfolioState.lastNewAssetIndex == portfolioState.newAssets.length) {
portfolioState.newAssets = _extendNewAssetArray(portfolioState.newAssets);
}
// Otherwise add to the new assets array. It should not be possible to add matching assets in a single transaction, we will
// check this again when we write to storage. Assigning to memory directly here, do not allocate new memory via struct.
PortfolioAsset memory newAsset = portfolioState.newAssets[portfolioState.lastNewAssetIndex];
newAsset.currencyId = currencyId;
newAsset.maturity = maturity;
newAsset.assetType = assetType;
newAsset.notional = notional;
newAsset.storageState = AssetStorageState.NoChange;
portfolioState.lastNewAssetIndex += 1;
}
/// @dev Extends the new asset array if it is not large enough, this is likely to get a bit expensive if we do
/// it too much
function _extendNewAssetArray(PortfolioAsset[] memory newAssets)
private
pure
returns (PortfolioAsset[] memory)
{
// Double the size of the new asset array every time we have to extend to reduce the number of times
// that we have to extend it. This will go: 0, 1, 2, 4, 8 (probably stops there).
uint256 newLength = newAssets.length == 0 ? 1 : newAssets.length * 2;
PortfolioAsset[] memory extendedArray = new PortfolioAsset[](newLength);
for (uint256 i = 0; i < newAssets.length; i++) {
extendedArray[i] = newAssets[i];
}
return extendedArray;
}
/// @notice Takes a portfolio state and writes it to storage.
/// @dev This method should only be called directly by the nToken. Account updates to portfolios should happen via
/// the storeAssetsAndUpdateContext call in the AccountContextHandler.sol library.
/// @return updated variables to update the account context with
/// hasDebt: whether or not the portfolio has negative fCash assets
/// portfolioActiveCurrencies: a byte32 word with all the currencies in the portfolio
/// uint8: the length of the storage array
/// uint40: the new nextSettleTime for the portfolio
function storeAssets(PortfolioState memory portfolioState, address account)
internal
returns (
bool,
bytes32,
uint8,
uint40
)
{
bool hasDebt;
// NOTE: cannot have more than 16 assets or this byte object will overflow. Max assets is
// set to 7 and the worst case during liquidation would be 7 liquidity tokens that generate
// 7 additional fCash assets for a total of 14 assets. Although even in this case all assets
// would be of the same currency so it would not change the end result of the active currency
// calculation.
bytes32 portfolioActiveCurrencies;
uint256 nextSettleTime;
for (uint256 i = 0; i < portfolioState.storedAssets.length; i++) {
PortfolioAsset memory asset = portfolioState.storedAssets[i];
// NOTE: this is to prevent the storage of assets that have been modified in the AssetHandler
// during valuation.
require(asset.storageState != AssetStorageState.RevertIfStored);
// Mark any zero notional assets as deleted
if (asset.storageState != AssetStorageState.Delete && asset.notional == 0) {
deleteAsset(portfolioState, i);
}
}
// First delete assets from asset storage to maintain asset storage indexes
for (uint256 i = 0; i < portfolioState.storedAssets.length; i++) {
PortfolioAsset memory asset = portfolioState.storedAssets[i];
if (asset.storageState == AssetStorageState.Delete) {
// Delete asset from storage
uint256 currentSlot = asset.storageSlot;
assembly {
sstore(currentSlot, 0x00)
}
} else {
if (asset.storageState == AssetStorageState.Update) {
PortfolioAssetStorage storage assetStorage;
uint256 currentSlot = asset.storageSlot;
assembly {
assetStorage.slot := currentSlot
}
_storeAsset(asset, assetStorage);
}
// Update portfolio context for every asset that is in storage, whether it is
// updated in storage or not.
(hasDebt, portfolioActiveCurrencies, nextSettleTime) = _updatePortfolioContext(
asset,
hasDebt,
portfolioActiveCurrencies,
nextSettleTime
);
}
}
// Add new assets
uint256 assetStorageLength = portfolioState.storedAssetLength;
mapping(address =>
PortfolioAssetStorage[MAX_PORTFOLIO_ASSETS]) storage store = LibStorage.getPortfolioArrayStorage();
PortfolioAssetStorage[MAX_PORTFOLIO_ASSETS] storage storageArray = store[account];
for (uint256 i = 0; i < portfolioState.newAssets.length; i++) {
PortfolioAsset memory asset = portfolioState.newAssets[i];
if (asset.notional == 0) continue;
require(
asset.storageState != AssetStorageState.Delete &&
asset.storageState != AssetStorageState.RevertIfStored
); // dev: store assets deleted storage
(hasDebt, portfolioActiveCurrencies, nextSettleTime) = _updatePortfolioContext(
asset,
hasDebt,
portfolioActiveCurrencies,
nextSettleTime
);
_storeAsset(asset, storageArray[assetStorageLength]);
assetStorageLength += 1;
}
// 16 is the maximum number of assets or portfolio active currencies will overflow at 32 bytes with
// 2 bytes per currency
require(assetStorageLength <= 16 && nextSettleTime <= type(uint40).max); // dev: portfolio return value overflow
return (
hasDebt,
portfolioActiveCurrencies,
uint8(assetStorageLength),
uint40(nextSettleTime)
);
}
/// @notice Updates context information during the store assets method
function _updatePortfolioContext(
PortfolioAsset memory asset,
bool hasDebt,
bytes32 portfolioActiveCurrencies,
uint256 nextSettleTime
)
private
pure
returns (
bool,
bytes32,
uint256
)
{
uint256 settlementDate = asset.getSettlementDate();
// Tis will set it to the minimum settlement date
if (nextSettleTime == 0 || nextSettleTime > settlementDate) {
nextSettleTime = settlementDate;
}
hasDebt = hasDebt || asset.notional < 0;
require(uint16(uint256(portfolioActiveCurrencies)) == 0); // dev: portfolio active currencies overflow
portfolioActiveCurrencies = (portfolioActiveCurrencies >> 16) | (bytes32(asset.currencyId) << 240);
return (hasDebt, portfolioActiveCurrencies, nextSettleTime);
}
/// @dev Encodes assets for storage
function _storeAsset(
PortfolioAsset memory asset,
PortfolioAssetStorage storage assetStorage
) internal {
require(0 < asset.currencyId && asset.currencyId <= Constants.MAX_CURRENCIES); // dev: encode asset currency id overflow
require(0 < asset.maturity && asset.maturity <= type(uint40).max); // dev: encode asset maturity overflow
require(0 < asset.assetType && asset.assetType <= Constants.MAX_LIQUIDITY_TOKEN_INDEX); // dev: encode asset type invalid
require(type(int88).min <= asset.notional && asset.notional <= type(int88).max); // dev: encode asset notional overflow
assetStorage.currencyId = uint16(asset.currencyId);
assetStorage.maturity = uint40(asset.maturity);
assetStorage.assetType = uint8(asset.assetType);
assetStorage.notional = int88(asset.notional);
}
/// @notice Deletes an asset from a portfolio
/// @dev This method should only be called during settlement, assets can only be removed from a portfolio before settlement
/// by adding the offsetting negative position
function deleteAsset(PortfolioState memory portfolioState, uint256 index) internal pure {
require(index < portfolioState.storedAssets.length); // dev: stored assets bounds
require(portfolioState.storedAssetLength > 0); // dev: stored assets length is zero
PortfolioAsset memory assetToDelete = portfolioState.storedAssets[index];
require(
assetToDelete.storageState != AssetStorageState.Delete &&
assetToDelete.storageState != AssetStorageState.RevertIfStored
); // dev: cannot delete asset
portfolioState.storedAssetLength -= 1;
uint256 maxActiveSlotIndex;
uint256 maxActiveSlot;
// The max active slot is the last storage slot where an asset exists, it's not clear where this will be in the
// array so we search for it here.
for (uint256 i; i < portfolioState.storedAssets.length; i++) {
PortfolioAsset memory a = portfolioState.storedAssets[i];
if (a.storageSlot > maxActiveSlot && a.storageState != AssetStorageState.Delete) {
maxActiveSlot = a.storageSlot;
maxActiveSlotIndex = i;
}
}
if (index == maxActiveSlotIndex) {
// In this case we are deleting the asset with the max storage slot so no swap is necessary.
assetToDelete.storageState = AssetStorageState.Delete;
return;
}
// Swap the storage slots of the deleted asset with the last non-deleted asset in the array. Mark them accordingly
// so that when we call store assets they will be updated appropriately
PortfolioAsset memory assetToSwap = portfolioState.storedAssets[maxActiveSlotIndex];
(
assetToSwap.storageSlot,
assetToDelete.storageSlot
) = (
assetToDelete.storageSlot,
assetToSwap.storageSlot
);
assetToSwap.storageState = AssetStorageState.Update;
assetToDelete.storageState = AssetStorageState.Delete;
}
/// @notice Returns a portfolio array, will be sorted
function getSortedPortfolio(address account, uint8 assetArrayLength)
internal
view
returns (PortfolioAsset[] memory)
{
PortfolioAsset[] memory assets = _loadAssetArray(account, assetArrayLength);
// No sorting required for length of 1
if (assets.length <= 1) return assets;
_sortInPlace(assets);
return assets;
}
/// @notice Builds a portfolio array from storage. The new assets hint parameter will
/// be used to provision a new array for the new assets. This will increase gas efficiency
/// so that we don't have to make copies when we extend the array.
function buildPortfolioState(
address account,
uint8 assetArrayLength,
uint256 newAssetsHint
) internal view returns (PortfolioState memory) {
PortfolioState memory state;
if (assetArrayLength == 0) return state;
state.storedAssets = getSortedPortfolio(account, assetArrayLength);
state.storedAssetLength = assetArrayLength;
state.newAssets = new PortfolioAsset[](newAssetsHint);
return state;
}
function _sortInPlace(PortfolioAsset[] memory assets) private pure {
uint256 length = assets.length;
uint256[] memory ids = new uint256[](length);
for (uint256 k; k < length; k++) {
PortfolioAsset memory asset = assets[k];
// Prepopulate the ids to calculate just once
ids[k] = TransferAssets.encodeAssetId(asset.currencyId, asset.maturity, asset.assetType);
}
// Uses insertion sort
uint256 i = 1;
while (i < length) {
uint256 j = i;
while (j > 0 && ids[j - 1] > ids[j]) {
// Swap j - 1 and j
(ids[j - 1], ids[j]) = (ids[j], ids[j - 1]);
(assets[j - 1], assets[j]) = (assets[j], assets[j - 1]);
j--;
}
i++;
}
}
function _loadAssetArray(address account, uint8 length)
private
view
returns (PortfolioAsset[] memory)
{
// This will overflow the storage pointer
require(length <= MAX_PORTFOLIO_ASSETS);
mapping(address =>
PortfolioAssetStorage[MAX_PORTFOLIO_ASSETS]) storage store = LibStorage.getPortfolioArrayStorage();
PortfolioAssetStorage[MAX_PORTFOLIO_ASSETS] storage storageArray = store[account];
PortfolioAsset[] memory assets = new PortfolioAsset[](length);
for (uint256 i = 0; i < length; i++) {
PortfolioAssetStorage storage assetStorage = storageArray[i];
PortfolioAsset memory asset = assets[i];
uint256 slot;
assembly {
slot := assetStorage.slot
}
asset.currencyId = assetStorage.currencyId;
asset.maturity = assetStorage.maturity;
asset.assetType = assetStorage.assetType;
asset.notional = assetStorage.notional;
asset.storageSlot = slot;
}
return assets;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../global/LibStorage.sol";
import "./balances/BalanceHandler.sol";
import "./portfolio/BitmapAssetsHandler.sol";
import "./portfolio/PortfolioHandler.sol";
library AccountContextHandler {
using PortfolioHandler for PortfolioState;
bytes18 private constant TURN_OFF_PORTFOLIO_FLAGS = 0x7FFF7FFF7FFF7FFF7FFF7FFF7FFF7FFF7FFF;
event AccountContextUpdate(address indexed account);
/// @notice Returns the account context of a given account
function getAccountContext(address account) internal view returns (AccountContext memory) {
mapping(address => AccountContext) storage store = LibStorage.getAccountStorage();
return store[account];
}
/// @notice Sets the account context of a given account
function setAccountContext(AccountContext memory accountContext, address account) internal {
mapping(address => AccountContext) storage store = LibStorage.getAccountStorage();
store[account] = accountContext;
emit AccountContextUpdate(account);
}
function isBitmapEnabled(AccountContext memory accountContext) internal pure returns (bool) {
return accountContext.bitmapCurrencyId != 0;
}
/// @notice Enables a bitmap type portfolio for an account. A bitmap type portfolio allows
/// an account to hold more fCash than a normal portfolio, except only in a single currency.
/// Once enabled, it cannot be disabled or changed. An account can only enable a bitmap if
/// it has no assets or debt so that we ensure no assets are left stranded.
/// @param accountContext refers to the account where the bitmap will be enabled
/// @param currencyId the id of the currency to enable
/// @param blockTime the current block time to set the next settle time
function enableBitmapForAccount(
AccountContext memory accountContext,
uint16 currencyId,
uint256 blockTime
) internal view {
require(!isBitmapEnabled(accountContext), "Cannot change bitmap");
require(0 < currencyId && currencyId <= Constants.MAX_CURRENCIES, "Invalid currency id");
// Account cannot have assets or debts
require(accountContext.assetArrayLength == 0, "Cannot have assets");
require(accountContext.hasDebt == 0x00, "Cannot have debt");
// Ensure that the active currency is set to false in the array so that there is no double
// counting during FreeCollateral
setActiveCurrency(accountContext, currencyId, false, Constants.ACTIVE_IN_BALANCES);
accountContext.bitmapCurrencyId = currencyId;
// Setting this is required to initialize the assets bitmap
uint256 nextSettleTime = DateTime.getTimeUTC0(blockTime);
require(nextSettleTime < type(uint40).max); // dev: blockTime overflow
accountContext.nextSettleTime = uint40(nextSettleTime);
}
/// @notice Returns true if the context needs to settle
function mustSettleAssets(AccountContext memory accountContext) internal view returns (bool) {
uint256 blockTime = block.timestamp;
if (isBitmapEnabled(accountContext)) {
// nextSettleTime will be set to utc0 after settlement so we
// settle if this is strictly less than utc0
return accountContext.nextSettleTime < DateTime.getTimeUTC0(blockTime);
} else {
// 0 value occurs on an uninitialized account
// Assets mature exactly on the blockTime (not one second past) so in this
// case we settle on the block timestamp
return 0 < accountContext.nextSettleTime && accountContext.nextSettleTime <= blockTime;
}
}
/// @notice Checks if a currency id (uint16 max) is in the 9 slots in the account
/// context active currencies list.
/// @dev NOTE: this may be more efficient as a binary search since we know that the array
/// is sorted
function isActiveInBalances(AccountContext memory accountContext, uint256 currencyId)
internal
pure
returns (bool)
{
require(currencyId != 0 && currencyId <= Constants.MAX_CURRENCIES); // dev: invalid currency id
bytes18 currencies = accountContext.activeCurrencies;
if (accountContext.bitmapCurrencyId == currencyId) return true;
while (currencies != 0x00) {
uint256 cid = uint16(bytes2(currencies) & Constants.UNMASK_FLAGS);
if (cid == currencyId) {
// Currency found, return if it is active in balances or not
return bytes2(currencies) & Constants.ACTIVE_IN_BALANCES == Constants.ACTIVE_IN_BALANCES;
}
currencies = currencies << 16;
}
return false;
}
/// @notice Iterates through the active currency list and removes, inserts or does nothing
/// to ensure that the active currency list is an ordered byte array of uint16 currency ids
/// that refer to the currencies that an account is active in.
///
/// This is called to ensure that currencies are active when the account has a non zero cash balance,
/// a non zero nToken balance or a portfolio asset.
function setActiveCurrency(
AccountContext memory accountContext,
uint256 currencyId,
bool isActive,
bytes2 flags
) internal pure {
require(0 < currencyId && currencyId <= Constants.MAX_CURRENCIES); // dev: invalid currency id
// If the bitmapped currency is already set then return here. Turning off the bitmap currency
// id requires other logical handling so we will do it elsewhere.
if (isActive && accountContext.bitmapCurrencyId == currencyId) return;
bytes18 prefix;
bytes18 suffix = accountContext.activeCurrencies;
uint256 shifts;
/// There are six possible outcomes from this search:
/// 1. The currency id is in the list
/// - it must be set to active, do nothing
/// - it must be set to inactive, shift suffix and concatenate
/// 2. The current id is greater than the one in the search:
/// - it must be set to active, append to prefix and then concatenate the suffix,
/// ensure that we do not lose the last 2 bytes if set.
/// - it must be set to inactive, it is not in the list, do nothing
/// 3. Reached the end of the list:
/// - it must be set to active, check that the last two bytes are not set and then
/// append to the prefix
/// - it must be set to inactive, do nothing
while (suffix != 0x00) {
uint256 cid = uint256(uint16(bytes2(suffix) & Constants.UNMASK_FLAGS));
// if matches and isActive then return, already in list
if (cid == currencyId && isActive) {
// set flag and return
accountContext.activeCurrencies =
accountContext.activeCurrencies |
(bytes18(flags) >> (shifts * 16));
return;
}
// if matches and not active then shift suffix to remove
if (cid == currencyId && !isActive) {
// turn off flag, if both flags are off then remove
suffix = suffix & ~bytes18(flags);
if (bytes2(suffix) & ~Constants.UNMASK_FLAGS == 0x0000) suffix = suffix << 16;
accountContext.activeCurrencies = prefix | (suffix >> (shifts * 16));
return;
}
// if greater than and isActive then insert into prefix
if (cid > currencyId && isActive) {
prefix = prefix | (bytes18(bytes2(uint16(currencyId)) | flags) >> (shifts * 16));
// check that the total length is not greater than 9, meaning that the last
// two bytes of the active currencies array should be zero
require((accountContext.activeCurrencies << 128) == 0x00); // dev: AC: too many currencies
// append the suffix
accountContext.activeCurrencies = prefix | (suffix >> ((shifts + 1) * 16));
return;
}
// if past the point of the currency id and not active, not in list
if (cid > currencyId && !isActive) return;
prefix = prefix | (bytes18(bytes2(suffix)) >> (shifts * 16));
suffix = suffix << 16;
shifts += 1;
}
// If reached this point and not active then return
if (!isActive) return;
// if end and isActive then insert into suffix, check max length
require(shifts < 9); // dev: AC: too many currencies
accountContext.activeCurrencies =
prefix |
(bytes18(bytes2(uint16(currencyId)) | flags) >> (shifts * 16));
}
function _clearPortfolioActiveFlags(bytes18 activeCurrencies) internal pure returns (bytes18) {
bytes18 result;
// This is required to clear the suffix as we append below
bytes18 suffix = activeCurrencies & TURN_OFF_PORTFOLIO_FLAGS;
uint256 shifts;
// This loop will append all currencies that are active in balances into the result.
while (suffix != 0x00) {
if (bytes2(suffix) & Constants.ACTIVE_IN_BALANCES == Constants.ACTIVE_IN_BALANCES) {
// If any flags are active, then append.
result = result | (bytes18(bytes2(suffix)) >> shifts);
shifts += 16;
}
suffix = suffix << 16;
}
return result;
}
/// @notice Stores a portfolio array and updates the account context information, this method should
/// be used whenever updating a portfolio array except in the case of nTokens
function storeAssetsAndUpdateContext(
AccountContext memory accountContext,
address account,
PortfolioState memory portfolioState,
bool isLiquidation
) internal {
// Each of these parameters is recalculated based on the entire array of assets in store assets,
// regardless of whether or not they have been updated.
(bool hasDebt, bytes32 portfolioCurrencies, uint8 assetArrayLength, uint40 nextSettleTime) =
portfolioState.storeAssets(account);
accountContext.nextSettleTime = nextSettleTime;
require(mustSettleAssets(accountContext) == false); // dev: cannot store matured assets
accountContext.assetArrayLength = assetArrayLength;
// During liquidation it is possible for an array to go over the max amount of assets allowed due to
// liquidity tokens being withdrawn into fCash.
if (!isLiquidation) {
require(assetArrayLength <= uint8(Constants.MAX_TRADED_MARKET_INDEX)); // dev: max assets allowed
}
// Sets the hasDebt flag properly based on whether or not portfolio has asset debt, meaning
// a negative fCash balance.
if (hasDebt) {
accountContext.hasDebt = accountContext.hasDebt | Constants.HAS_ASSET_DEBT;
} else {
// Turns off the ASSET_DEBT flag
accountContext.hasDebt = accountContext.hasDebt & ~Constants.HAS_ASSET_DEBT;
}
// Clear the active portfolio active flags and they will be recalculated in the next step
accountContext.activeCurrencies = _clearPortfolioActiveFlags(accountContext.activeCurrencies);
uint256 lastCurrency;
while (portfolioCurrencies != 0) {
// Portfolio currencies will not have flags, it is just an byte array of all the currencies found
// in a portfolio. They are appended in a sorted order so we can compare to the previous currency
// and only set it if they are different.
uint256 currencyId = uint16(bytes2(portfolioCurrencies));
if (currencyId != lastCurrency) {
setActiveCurrency(accountContext, currencyId, true, Constants.ACTIVE_IN_PORTFOLIO);
}
lastCurrency = currencyId;
portfolioCurrencies = portfolioCurrencies << 16;
}
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
interface NotionalCallback {
function notionalCallback(address sender, address account, bytes calldata callbackdata) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "./AssetRate.sol";
import "./CashGroup.sol";
import "./DateTime.sol";
import "../balances/BalanceHandler.sol";
import "../../global/LibStorage.sol";
import "../../global/Types.sol";
import "../../global/Constants.sol";
import "../../math/SafeInt256.sol";
import "../../math/ABDKMath64x64.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
library Market {
using SafeMath for uint256;
using SafeInt256 for int256;
using CashGroup for CashGroupParameters;
using AssetRate for AssetRateParameters;
// Max positive value for a ABDK64x64 integer
int256 private constant MAX64 = 0x7FFFFFFFFFFFFFFF;
/// @notice Add liquidity to a market, assuming that it is initialized. If not then
/// this method will revert and the market must be initialized first.
/// Return liquidityTokens and negative fCash to the portfolio
function addLiquidity(MarketParameters memory market, int256 assetCash)
internal
returns (int256 liquidityTokens, int256 fCash)
{
require(market.totalLiquidity > 0, "M: zero liquidity");
if (assetCash == 0) return (0, 0);
require(assetCash > 0); // dev: negative asset cash
liquidityTokens = market.totalLiquidity.mul(assetCash).div(market.totalAssetCash);
// No need to convert this to underlying, assetCash / totalAssetCash is a unitless proportion.
fCash = market.totalfCash.mul(assetCash).div(market.totalAssetCash);
market.totalLiquidity = market.totalLiquidity.add(liquidityTokens);
market.totalfCash = market.totalfCash.add(fCash);
market.totalAssetCash = market.totalAssetCash.add(assetCash);
_setMarketStorageForLiquidity(market);
// Flip the sign to represent the LP's net position
fCash = fCash.neg();
}
/// @notice Remove liquidity from a market, assuming that it is initialized.
/// Return assetCash and positive fCash to the portfolio
function removeLiquidity(MarketParameters memory market, int256 tokensToRemove)
internal
returns (int256 assetCash, int256 fCash)
{
if (tokensToRemove == 0) return (0, 0);
require(tokensToRemove > 0); // dev: negative tokens to remove
assetCash = market.totalAssetCash.mul(tokensToRemove).div(market.totalLiquidity);
fCash = market.totalfCash.mul(tokensToRemove).div(market.totalLiquidity);
market.totalLiquidity = market.totalLiquidity.subNoNeg(tokensToRemove);
market.totalfCash = market.totalfCash.subNoNeg(fCash);
market.totalAssetCash = market.totalAssetCash.subNoNeg(assetCash);
_setMarketStorageForLiquidity(market);
}
function executeTrade(
MarketParameters memory market,
CashGroupParameters memory cashGroup,
int256 fCashToAccount,
uint256 timeToMaturity,
uint256 marketIndex
) internal returns (int256 netAssetCash) {
int256 netAssetCashToReserve;
(netAssetCash, netAssetCashToReserve) = calculateTrade(
market,
cashGroup,
fCashToAccount,
timeToMaturity,
marketIndex
);
MarketStorage storage marketStorage = _getMarketStoragePointer(market);
_setMarketStorage(
marketStorage,
market.totalfCash,
market.totalAssetCash,
market.lastImpliedRate,
market.oracleRate,
market.previousTradeTime
);
BalanceHandler.incrementFeeToReserve(cashGroup.currencyId, netAssetCashToReserve);
}
/// @notice Calculates the asset cash amount the results from trading fCashToAccount with the market. A positive
/// fCashToAccount is equivalent of lending, a negative is borrowing. Updates the market state in memory.
/// @param market the current market state
/// @param cashGroup cash group configuration parameters
/// @param fCashToAccount the fCash amount that will be deposited into the user's portfolio. The net change
/// to the market is in the opposite direction.
/// @param timeToMaturity number of seconds until maturity
/// @return netAssetCash, netAssetCashToReserve
function calculateTrade(
MarketParameters memory market,
CashGroupParameters memory cashGroup,
int256 fCashToAccount,
uint256 timeToMaturity,
uint256 marketIndex
) internal view returns (int256, int256) {
// We return false if there is not enough fCash to support this trade.
// if fCashToAccount > 0 and totalfCash - fCashToAccount <= 0 then the trade will fail
// if fCashToAccount < 0 and totalfCash > 0 then this will always pass
if (market.totalfCash <= fCashToAccount) return (0, 0);
// Calculates initial rate factors for the trade
(int256 rateScalar, int256 totalCashUnderlying, int256 rateAnchor) =
getExchangeRateFactors(market, cashGroup, timeToMaturity, marketIndex);
// Calculates the exchange rate from cash to fCash before any liquidity fees
// are applied
int256 preFeeExchangeRate;
{
bool success;
(preFeeExchangeRate, success) = _getExchangeRate(
market.totalfCash,
totalCashUnderlying,
rateScalar,
rateAnchor,
fCashToAccount
);
if (!success) return (0, 0);
}
// Given the exchange rate, returns the net cash amounts to apply to each of the
// three relevant balances.
(int256 netCashToAccount, int256 netCashToMarket, int256 netCashToReserve) =
_getNetCashAmountsUnderlying(
cashGroup,
preFeeExchangeRate,
fCashToAccount,
timeToMaturity
);
// Signifies a failed net cash amount calculation
if (netCashToAccount == 0) return (0, 0);
{
// Set the new implied interest rate after the trade has taken effect, this
// will be used to calculate the next trader's interest rate.
market.totalfCash = market.totalfCash.subNoNeg(fCashToAccount);
market.lastImpliedRate = getImpliedRate(
market.totalfCash,
totalCashUnderlying.add(netCashToMarket),
rateScalar,
rateAnchor,
timeToMaturity
);
// It's technically possible that the implied rate is actually exactly zero (or
// more accurately the natural log rounds down to zero) but we will still fail
// in this case. If this does happen we may assume that markets are not initialized.
if (market.lastImpliedRate == 0) return (0, 0);
}
return
_setNewMarketState(
market,
cashGroup.assetRate,
netCashToAccount,
netCashToMarket,
netCashToReserve
);
}
/// @notice Returns factors for calculating exchange rates
/// @return
/// rateScalar: a scalar value in rate precision that defines the slope of the line
/// totalCashUnderlying: the converted asset cash to underlying cash for calculating
/// the exchange rates for the trade
/// rateAnchor: an offset from the x axis to maintain interest rate continuity over time
function getExchangeRateFactors(
MarketParameters memory market,
CashGroupParameters memory cashGroup,
uint256 timeToMaturity,
uint256 marketIndex
)
internal
pure
returns (
int256,
int256,
int256
)
{
int256 rateScalar = cashGroup.getRateScalar(marketIndex, timeToMaturity);
int256 totalCashUnderlying = cashGroup.assetRate.convertToUnderlying(market.totalAssetCash);
// This would result in a divide by zero
if (market.totalfCash == 0 || totalCashUnderlying == 0) return (0, 0, 0);
// Get the rate anchor given the market state, this will establish the baseline for where
// the exchange rate is set.
int256 rateAnchor;
{
bool success;
(rateAnchor, success) = _getRateAnchor(
market.totalfCash,
market.lastImpliedRate,
totalCashUnderlying,
rateScalar,
timeToMaturity
);
if (!success) return (0, 0, 0);
}
return (rateScalar, totalCashUnderlying, rateAnchor);
}
/// @dev Returns net asset cash amounts to the account, the market and the reserve
/// @return
/// netCashToAccount: this is a positive or negative amount of cash change to the account
/// netCashToMarket: this is a positive or negative amount of cash change in the market
// netCashToReserve: this is always a positive amount of cash accrued to the reserve
function _getNetCashAmountsUnderlying(
CashGroupParameters memory cashGroup,
int256 preFeeExchangeRate,
int256 fCashToAccount,
uint256 timeToMaturity
)
private
pure
returns (
int256,
int256,
int256
)
{
// Fees are specified in basis points which is an rate precision denomination. We convert this to
// an exchange rate denomination for the given time to maturity. (i.e. get e^(fee * t) and multiply
// or divide depending on the side of the trade).
// tradeExchangeRate = exp((tradeInterestRateNoFee +/- fee) * timeToMaturity)
// tradeExchangeRate = tradeExchangeRateNoFee (* or /) exp(fee * timeToMaturity)
// cash = fCash / exchangeRate, exchangeRate > 1
int256 preFeeCashToAccount =
fCashToAccount.divInRatePrecision(preFeeExchangeRate).neg();
int256 fee = getExchangeRateFromImpliedRate(cashGroup.getTotalFee(), timeToMaturity);
if (fCashToAccount > 0) {
// Lending
// Dividing reduces exchange rate, lending should receive less fCash for cash
int256 postFeeExchangeRate = preFeeExchangeRate.divInRatePrecision(fee);
// It's possible that the fee pushes exchange rates into negative territory. This is not possible
// when borrowing. If this happens then the trade has failed.
if (postFeeExchangeRate < Constants.RATE_PRECISION) return (0, 0, 0);
// cashToAccount = -(fCashToAccount / exchangeRate)
// postFeeExchangeRate = preFeeExchangeRate / feeExchangeRate
// preFeeCashToAccount = -(fCashToAccount / preFeeExchangeRate)
// postFeeCashToAccount = -(fCashToAccount / postFeeExchangeRate)
// netFee = preFeeCashToAccount - postFeeCashToAccount
// netFee = (fCashToAccount / postFeeExchangeRate) - (fCashToAccount / preFeeExchangeRate)
// netFee = ((fCashToAccount * feeExchangeRate) / preFeeExchangeRate) - (fCashToAccount / preFeeExchangeRate)
// netFee = (fCashToAccount / preFeeExchangeRate) * (feeExchangeRate - 1)
// netFee = -(preFeeCashToAccount) * (feeExchangeRate - 1)
// netFee = preFeeCashToAccount * (1 - feeExchangeRate)
// RATE_PRECISION - fee will be negative here, preFeeCashToAccount < 0, fee > 0
fee = preFeeCashToAccount.mulInRatePrecision(Constants.RATE_PRECISION.sub(fee));
} else {
// Borrowing
// cashToAccount = -(fCashToAccount / exchangeRate)
// postFeeExchangeRate = preFeeExchangeRate * feeExchangeRate
// netFee = preFeeCashToAccount - postFeeCashToAccount
// netFee = (fCashToAccount / postFeeExchangeRate) - (fCashToAccount / preFeeExchangeRate)
// netFee = ((fCashToAccount / (feeExchangeRate * preFeeExchangeRate)) - (fCashToAccount / preFeeExchangeRate)
// netFee = (fCashToAccount / preFeeExchangeRate) * (1 / feeExchangeRate - 1)
// netFee = preFeeCashToAccount * ((1 - feeExchangeRate) / feeExchangeRate)
// NOTE: preFeeCashToAccount is negative in this branch so we negate it to ensure that fee is a positive number
// preFee * (1 - fee) / fee will be negative, use neg() to flip to positive
// RATE_PRECISION - fee will be negative
fee = preFeeCashToAccount.mul(Constants.RATE_PRECISION.sub(fee)).div(fee).neg();
}
int256 cashToReserve =
fee.mul(cashGroup.getReserveFeeShare()).div(Constants.PERCENTAGE_DECIMALS);
return (
// postFeeCashToAccount = preFeeCashToAccount - fee
preFeeCashToAccount.sub(fee),
// netCashToMarket = -(preFeeCashToAccount - fee + cashToReserve)
(preFeeCashToAccount.sub(fee).add(cashToReserve)).neg(),
cashToReserve
);
}
/// @notice Sets the new market state
/// @return
/// netAssetCashToAccount: the positive or negative change in asset cash to the account
/// assetCashToReserve: the positive amount of cash that accrues to the reserve
function _setNewMarketState(
MarketParameters memory market,
AssetRateParameters memory assetRate,
int256 netCashToAccount,
int256 netCashToMarket,
int256 netCashToReserve
) private view returns (int256, int256) {
int256 netAssetCashToMarket = assetRate.convertFromUnderlying(netCashToMarket);
// Set storage checks that total asset cash is above zero
market.totalAssetCash = market.totalAssetCash.add(netAssetCashToMarket);
// Sets the trade time for the next oracle update
market.previousTradeTime = block.timestamp;
int256 assetCashToReserve = assetRate.convertFromUnderlying(netCashToReserve);
int256 netAssetCashToAccount = assetRate.convertFromUnderlying(netCashToAccount);
return (netAssetCashToAccount, assetCashToReserve);
}
/// @notice Rate anchors update as the market gets closer to maturity. Rate anchors are not comparable
/// across time or markets but implied rates are. The goal here is to ensure that the implied rate
/// before and after the rate anchor update is the same. Therefore, the market will trade at the same implied
/// rate that it last traded at. If these anchors do not update then it opens up the opportunity for arbitrage
/// which will hurt the liquidity providers.
///
/// The rate anchor will update as the market rolls down to maturity. The calculation is:
/// newExchangeRate = e^(lastImpliedRate * timeToMaturity / Constants.IMPLIED_RATE_TIME)
/// newAnchor = newExchangeRate - ln((proportion / (1 - proportion)) / rateScalar
///
/// where:
/// lastImpliedRate = ln(exchangeRate') * (Constants.IMPLIED_RATE_TIME / timeToMaturity')
/// (calculated when the last trade in the market was made)
/// @return the new rate anchor and a boolean that signifies success
function _getRateAnchor(
int256 totalfCash,
uint256 lastImpliedRate,
int256 totalCashUnderlying,
int256 rateScalar,
uint256 timeToMaturity
) internal pure returns (int256, bool) {
// This is the exchange rate at the new time to maturity
int256 newExchangeRate = getExchangeRateFromImpliedRate(lastImpliedRate, timeToMaturity);
if (newExchangeRate < Constants.RATE_PRECISION) return (0, false);
int256 rateAnchor;
{
// totalfCash / (totalfCash + totalCashUnderlying)
int256 proportion =
totalfCash.divInRatePrecision(totalfCash.add(totalCashUnderlying));
(int256 lnProportion, bool success) = _logProportion(proportion);
if (!success) return (0, false);
// newExchangeRate - ln(proportion / (1 - proportion)) / rateScalar
rateAnchor = newExchangeRate.sub(lnProportion.divInRatePrecision(rateScalar));
}
return (rateAnchor, true);
}
/// @notice Calculates the current market implied rate.
/// @return the implied rate and a bool that is true on success
function getImpliedRate(
int256 totalfCash,
int256 totalCashUnderlying,
int256 rateScalar,
int256 rateAnchor,
uint256 timeToMaturity
) internal pure returns (uint256) {
// This will check for exchange rates < Constants.RATE_PRECISION
(int256 exchangeRate, bool success) =
_getExchangeRate(totalfCash, totalCashUnderlying, rateScalar, rateAnchor, 0);
if (!success) return 0;
// Uses continuous compounding to calculate the implied rate:
// ln(exchangeRate) * Constants.IMPLIED_RATE_TIME / timeToMaturity
int128 rate = ABDKMath64x64.fromInt(exchangeRate);
// Scales down to a floating point for LN
int128 rateScaled = ABDKMath64x64.div(rate, Constants.RATE_PRECISION_64x64);
// We will not have a negative log here because we check that exchangeRate > Constants.RATE_PRECISION
// inside getExchangeRate
int128 lnRateScaled = ABDKMath64x64.ln(rateScaled);
// Scales up to a fixed point
uint256 lnRate =
ABDKMath64x64.toUInt(ABDKMath64x64.mul(lnRateScaled, Constants.RATE_PRECISION_64x64));
// lnRate * IMPLIED_RATE_TIME / ttm
uint256 impliedRate = lnRate.mul(Constants.IMPLIED_RATE_TIME).div(timeToMaturity);
// Implied rates over 429% will overflow, this seems like a safe assumption
if (impliedRate > type(uint32).max) return 0;
return impliedRate;
}
/// @notice Converts an implied rate to an exchange rate given a time to maturity. The
/// formula is E = e^rt
function getExchangeRateFromImpliedRate(uint256 impliedRate, uint256 timeToMaturity)
internal
pure
returns (int256)
{
int128 expValue =
ABDKMath64x64.fromUInt(
impliedRate.mul(timeToMaturity).div(Constants.IMPLIED_RATE_TIME)
);
int128 expValueScaled = ABDKMath64x64.div(expValue, Constants.RATE_PRECISION_64x64);
int128 expResult = ABDKMath64x64.exp(expValueScaled);
int128 expResultScaled = ABDKMath64x64.mul(expResult, Constants.RATE_PRECISION_64x64);
return ABDKMath64x64.toInt(expResultScaled);
}
/// @notice Returns the exchange rate between fCash and cash for the given market
/// Calculates the following exchange rate:
/// (1 / rateScalar) * ln(proportion / (1 - proportion)) + rateAnchor
/// where:
/// proportion = totalfCash / (totalfCash + totalUnderlyingCash)
/// @dev has an underscore to denote as private but is marked internal for the mock
function _getExchangeRate(
int256 totalfCash,
int256 totalCashUnderlying,
int256 rateScalar,
int256 rateAnchor,
int256 fCashToAccount
) internal pure returns (int256, bool) {
int256 numerator = totalfCash.subNoNeg(fCashToAccount);
// This is the proportion scaled by Constants.RATE_PRECISION
// (totalfCash + fCash) / (totalfCash + totalCashUnderlying)
int256 proportion =
numerator.divInRatePrecision(totalfCash.add(totalCashUnderlying));
// This limit is here to prevent the market from reaching extremely high interest rates via an
// excessively large proportion (high amounts of fCash relative to cash).
// Market proportion can only increase via borrowing (fCash is added to the market and cash is
// removed). Over time, the returns from asset cash will slightly decrease the proportion (the
// value of cash underlying in the market must be monotonically increasing). Therefore it is not
// possible for the proportion to go over max market proportion unless borrowing occurs.
if (proportion > Constants.MAX_MARKET_PROPORTION) return (0, false);
(int256 lnProportion, bool success) = _logProportion(proportion);
if (!success) return (0, false);
// lnProportion / rateScalar + rateAnchor
int256 rate = lnProportion.divInRatePrecision(rateScalar).add(rateAnchor);
// Do not succeed if interest rates fall below 1
if (rate < Constants.RATE_PRECISION) {
return (0, false);
} else {
return (rate, true);
}
}
/// @dev This method calculates the log of the proportion inside the logit function which is
/// defined as ln(proportion / (1 - proportion)). Special handling here is required to deal with
/// fixed point precision and the ABDK library.
function _logProportion(int256 proportion) internal pure returns (int256, bool) {
// This will result in divide by zero, short circuit
if (proportion == Constants.RATE_PRECISION) return (0, false);
// Convert proportion to what is used inside the logit function (p / (1-p))
int256 logitP = proportion.divInRatePrecision(Constants.RATE_PRECISION.sub(proportion));
// ABDK does not handle log of numbers that are less than 1, in order to get the right value
// scaled by RATE_PRECISION we use the log identity:
// (ln(logitP / RATE_PRECISION)) * RATE_PRECISION = (ln(logitP) - ln(RATE_PRECISION)) * RATE_PRECISION
int128 abdkProportion = ABDKMath64x64.fromInt(logitP);
// Here, abdk will revert due to negative log so abort
if (abdkProportion <= 0) return (0, false);
int256 result =
ABDKMath64x64.toInt(
ABDKMath64x64.mul(
ABDKMath64x64.sub(
ABDKMath64x64.ln(abdkProportion),
Constants.LOG_RATE_PRECISION_64x64
),
Constants.RATE_PRECISION_64x64
)
);
return (result, true);
}
/// @notice Oracle rate protects against short term price manipulation. Time window will be set to a value
/// on the order of minutes to hours. This is to protect fCash valuations from market manipulation. For example,
/// a trader could use a flash loan to dump a large amount of cash into the market and depress interest rates.
/// Since we value fCash in portfolios based on these rates, portfolio values will decrease and they may then
/// be liquidated.
///
/// Oracle rates are calculated when the market is loaded from storage.
///
/// The oracle rate is a lagged weighted average over a short term price window. If we are past
/// the short term window then we just set the rate to the lastImpliedRate, otherwise we take the
/// weighted average:
/// lastImpliedRatePreTrade * (currentTs - previousTs) / timeWindow +
/// oracleRatePrevious * (1 - (currentTs - previousTs) / timeWindow)
function _updateRateOracle(
uint256 previousTradeTime,
uint256 lastImpliedRate,
uint256 oracleRate,
uint256 rateOracleTimeWindow,
uint256 blockTime
) private pure returns (uint256) {
require(rateOracleTimeWindow > 0); // dev: update rate oracle, time window zero
// This can occur when using a view function get to a market state in the past
if (previousTradeTime > blockTime) return lastImpliedRate;
uint256 timeDiff = blockTime.sub(previousTradeTime);
if (timeDiff > rateOracleTimeWindow) {
// If past the time window just return the lastImpliedRate
return lastImpliedRate;
}
// (currentTs - previousTs) / timeWindow
uint256 lastTradeWeight =
timeDiff.mul(uint256(Constants.RATE_PRECISION)).div(rateOracleTimeWindow);
// 1 - (currentTs - previousTs) / timeWindow
uint256 oracleWeight = uint256(Constants.RATE_PRECISION).sub(lastTradeWeight);
uint256 newOracleRate =
(lastImpliedRate.mul(lastTradeWeight).add(oracleRate.mul(oracleWeight))).div(
uint256(Constants.RATE_PRECISION)
);
return newOracleRate;
}
function getOracleRate(
uint256 currencyId,
uint256 maturity,
uint256 rateOracleTimeWindow,
uint256 blockTime
) internal view returns (uint256) {
mapping(uint256 => mapping(uint256 =>
mapping(uint256 => MarketStorage))) storage store = LibStorage.getMarketStorage();
uint256 settlementDate = DateTime.getReferenceTime(blockTime) + Constants.QUARTER;
MarketStorage storage marketStorage = store[currencyId][maturity][settlementDate];
uint256 lastImpliedRate = marketStorage.lastImpliedRate;
uint256 oracleRate = marketStorage.oracleRate;
uint256 previousTradeTime = marketStorage.previousTradeTime;
// If the oracle rate is set to zero this can only be because the markets have past their settlement
// date but the new set of markets has not yet been initialized. This means that accounts cannot be liquidated
// during this time, but market initialization can be called by anyone so the actual time that this condition
// exists for should be quite short.
require(oracleRate > 0, "Market not initialized");
return
_updateRateOracle(
previousTradeTime,
lastImpliedRate,
oracleRate,
rateOracleTimeWindow,
blockTime
);
}
/// @notice Reads a market object directly from storage. `loadMarket` should be called instead of this method
/// which ensures that the rate oracle is set properly.
function _loadMarketStorage(
MarketParameters memory market,
uint256 currencyId,
uint256 maturity,
bool needsLiquidity,
uint256 settlementDate
) private view {
// Market object always uses the most current reference time as the settlement date
mapping(uint256 => mapping(uint256 =>
mapping(uint256 => MarketStorage))) storage store = LibStorage.getMarketStorage();
MarketStorage storage marketStorage = store[currencyId][maturity][settlementDate];
bytes32 slot;
assembly {
slot := marketStorage.slot
}
market.storageSlot = slot;
market.maturity = maturity;
market.totalfCash = marketStorage.totalfCash;
market.totalAssetCash = marketStorage.totalAssetCash;
market.lastImpliedRate = marketStorage.lastImpliedRate;
market.oracleRate = marketStorage.oracleRate;
market.previousTradeTime = marketStorage.previousTradeTime;
if (needsLiquidity) {
market.totalLiquidity = marketStorage.totalLiquidity;
} else {
market.totalLiquidity = 0;
}
}
function _getMarketStoragePointer(
MarketParameters memory market
) private pure returns (MarketStorage storage marketStorage) {
bytes32 slot = market.storageSlot;
assembly {
marketStorage.slot := slot
}
}
function _setMarketStorageForLiquidity(MarketParameters memory market) internal {
MarketStorage storage marketStorage = _getMarketStoragePointer(market);
// Oracle rate does not change on liquidity
uint32 storedOracleRate = marketStorage.oracleRate;
_setMarketStorage(
marketStorage,
market.totalfCash,
market.totalAssetCash,
market.lastImpliedRate,
storedOracleRate,
market.previousTradeTime
);
_setTotalLiquidity(marketStorage, market.totalLiquidity);
}
function setMarketStorageForInitialize(
MarketParameters memory market,
uint256 currencyId,
uint256 settlementDate
) internal {
// On initialization we have not yet calculated the storage slot so we get it here.
mapping(uint256 => mapping(uint256 =>
mapping(uint256 => MarketStorage))) storage store = LibStorage.getMarketStorage();
MarketStorage storage marketStorage = store[currencyId][market.maturity][settlementDate];
_setMarketStorage(
marketStorage,
market.totalfCash,
market.totalAssetCash,
market.lastImpliedRate,
market.oracleRate,
market.previousTradeTime
);
_setTotalLiquidity(marketStorage, market.totalLiquidity);
}
function _setTotalLiquidity(
MarketStorage storage marketStorage,
int256 totalLiquidity
) internal {
require(totalLiquidity >= 0 && totalLiquidity <= type(uint80).max); // dev: market storage totalLiquidity overflow
marketStorage.totalLiquidity = uint80(totalLiquidity);
}
function _setMarketStorage(
MarketStorage storage marketStorage,
int256 totalfCash,
int256 totalAssetCash,
uint256 lastImpliedRate,
uint256 oracleRate,
uint256 previousTradeTime
) private {
require(totalfCash >= 0 && totalfCash <= type(uint80).max); // dev: storage totalfCash overflow
require(totalAssetCash >= 0 && totalAssetCash <= type(uint80).max); // dev: storage totalAssetCash overflow
require(0 < lastImpliedRate && lastImpliedRate <= type(uint32).max); // dev: storage lastImpliedRate overflow
require(0 < oracleRate && oracleRate <= type(uint32).max); // dev: storage oracleRate overflow
require(0 <= previousTradeTime && previousTradeTime <= type(uint32).max); // dev: storage previous trade time overflow
marketStorage.totalfCash = uint80(totalfCash);
marketStorage.totalAssetCash = uint80(totalAssetCash);
marketStorage.lastImpliedRate = uint32(lastImpliedRate);
marketStorage.oracleRate = uint32(oracleRate);
marketStorage.previousTradeTime = uint32(previousTradeTime);
}
/// @notice Creates a market object and ensures that the rate oracle time window is updated appropriately.
function loadMarket(
MarketParameters memory market,
uint256 currencyId,
uint256 maturity,
uint256 blockTime,
bool needsLiquidity,
uint256 rateOracleTimeWindow
) internal view {
// Always reference the current settlement date
uint256 settlementDate = DateTime.getReferenceTime(blockTime) + Constants.QUARTER;
loadMarketWithSettlementDate(
market,
currencyId,
maturity,
blockTime,
needsLiquidity,
rateOracleTimeWindow,
settlementDate
);
}
/// @notice Creates a market object and ensures that the rate oracle time window is updated appropriately, this
/// is mainly used in the InitializeMarketAction contract.
function loadMarketWithSettlementDate(
MarketParameters memory market,
uint256 currencyId,
uint256 maturity,
uint256 blockTime,
bool needsLiquidity,
uint256 rateOracleTimeWindow,
uint256 settlementDate
) internal view {
_loadMarketStorage(market, currencyId, maturity, needsLiquidity, settlementDate);
market.oracleRate = _updateRateOracle(
market.previousTradeTime,
market.lastImpliedRate,
market.oracleRate,
rateOracleTimeWindow,
blockTime
);
}
function loadSettlementMarket(
MarketParameters memory market,
uint256 currencyId,
uint256 maturity,
uint256 settlementDate
) internal view {
_loadMarketStorage(market, currencyId, maturity, true, settlementDate);
}
/// Uses Newton's method to converge on an fCash amount given the amount of
/// cash. The relation between cash and fcash is:
/// cashAmount * exchangeRate * fee + fCash = 0
/// where exchangeRate(fCash) = (rateScalar ^ -1) * ln(p / (1 - p)) + rateAnchor
/// p = (totalfCash - fCash) / (totalfCash + totalCash)
/// if cashAmount < 0: fee = feeRate ^ -1
/// if cashAmount > 0: fee = feeRate
///
/// Newton's method is:
/// fCash_(n+1) = fCash_n - f(fCash) / f'(fCash)
///
/// f(fCash) = cashAmount * exchangeRate(fCash) * fee + fCash
///
/// (totalfCash + totalCash)
/// exchangeRate'(fCash) = - ------------------------------------------
/// (totalfCash - fCash) * (totalCash + fCash)
///
/// https://www.wolframalpha.com/input/?i=ln%28%28%28a-x%29%2F%28a%2Bb%29%29%2F%281-%28a-x%29%2F%28a%2Bb%29%29%29
///
/// (cashAmount * fee) * (totalfCash + totalCash)
/// f'(fCash) = 1 - ------------------------------------------------------
/// rateScalar * (totalfCash - fCash) * (totalCash + fCash)
///
/// NOTE: each iteration costs about 11.3k so this is only done via a view function.
function getfCashGivenCashAmount(
int256 totalfCash,
int256 netCashToAccount,
int256 totalCashUnderlying,
int256 rateScalar,
int256 rateAnchor,
int256 feeRate,
int256 maxDelta
) internal pure returns (int256) {
require(maxDelta >= 0);
int256 fCashChangeToAccountGuess = netCashToAccount.mulInRatePrecision(rateAnchor).neg();
for (uint8 i = 0; i < 250; i++) {
(int256 exchangeRate, bool success) =
_getExchangeRate(
totalfCash,
totalCashUnderlying,
rateScalar,
rateAnchor,
fCashChangeToAccountGuess
);
require(success); // dev: invalid exchange rate
int256 delta =
_calculateDelta(
netCashToAccount,
totalfCash,
totalCashUnderlying,
rateScalar,
fCashChangeToAccountGuess,
exchangeRate,
feeRate
);
if (delta.abs() <= maxDelta) return fCashChangeToAccountGuess;
fCashChangeToAccountGuess = fCashChangeToAccountGuess.sub(delta);
}
revert("No convergence");
}
/// @dev Calculates: f(fCash) / f'(fCash)
/// f(fCash) = cashAmount * exchangeRate * fee + fCash
/// (cashAmount * fee) * (totalfCash + totalCash)
/// f'(fCash) = 1 - ------------------------------------------------------
/// rateScalar * (totalfCash - fCash) * (totalCash + fCash)
function _calculateDelta(
int256 cashAmount,
int256 totalfCash,
int256 totalCashUnderlying,
int256 rateScalar,
int256 fCashGuess,
int256 exchangeRate,
int256 feeRate
) private pure returns (int256) {
int256 derivative;
// rateScalar * (totalfCash - fCash) * (totalCash + fCash)
// Precision: TOKEN_PRECISION ^ 2
int256 denominator =
rateScalar.mulInRatePrecision(
(totalfCash.sub(fCashGuess)).mul(totalCashUnderlying.add(fCashGuess))
);
if (fCashGuess > 0) {
// Lending
exchangeRate = exchangeRate.divInRatePrecision(feeRate);
require(exchangeRate >= Constants.RATE_PRECISION); // dev: rate underflow
// (cashAmount / fee) * (totalfCash + totalCash)
// Precision: TOKEN_PRECISION ^ 2
derivative = cashAmount
.mul(totalfCash.add(totalCashUnderlying))
.divInRatePrecision(feeRate);
} else {
// Borrowing
exchangeRate = exchangeRate.mulInRatePrecision(feeRate);
require(exchangeRate >= Constants.RATE_PRECISION); // dev: rate underflow
// (cashAmount * fee) * (totalfCash + totalCash)
// Precision: TOKEN_PRECISION ^ 2
derivative = cashAmount.mulInRatePrecision(
feeRate.mul(totalfCash.add(totalCashUnderlying))
);
}
// 1 - numerator / denominator
// Precision: TOKEN_PRECISION
derivative = Constants.INTERNAL_TOKEN_PRECISION.sub(derivative.div(denominator));
// f(fCash) = cashAmount * exchangeRate * fee + fCash
// NOTE: exchangeRate at this point already has the fee taken into account
int256 numerator = cashAmount.mulInRatePrecision(exchangeRate);
numerator = numerator.add(fCashGuess);
// f(fCash) / f'(fCash), note that they are both denominated as cashAmount so use TOKEN_PRECISION
// here instead of RATE_PRECISION
return numerator.mul(Constants.INTERNAL_TOKEN_PRECISION).div(derivative);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "./Market.sol";
import "./AssetRate.sol";
import "./DateTime.sol";
import "../../global/LibStorage.sol";
import "../../global/Types.sol";
import "../../global/Constants.sol";
import "../../math/SafeInt256.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
library CashGroup {
using SafeMath for uint256;
using SafeInt256 for int256;
using AssetRate for AssetRateParameters;
using Market for MarketParameters;
// Bit number references for each parameter in the 32 byte word (0-indexed)
uint256 private constant MARKET_INDEX_BIT = 31;
uint256 private constant RATE_ORACLE_TIME_WINDOW_BIT = 30;
uint256 private constant TOTAL_FEE_BIT = 29;
uint256 private constant RESERVE_FEE_SHARE_BIT = 28;
uint256 private constant DEBT_BUFFER_BIT = 27;
uint256 private constant FCASH_HAIRCUT_BIT = 26;
uint256 private constant SETTLEMENT_PENALTY_BIT = 25;
uint256 private constant LIQUIDATION_FCASH_HAIRCUT_BIT = 24;
uint256 private constant LIQUIDATION_DEBT_BUFFER_BIT = 23;
// 7 bytes allocated, one byte per market for the liquidity token haircut
uint256 private constant LIQUIDITY_TOKEN_HAIRCUT_FIRST_BIT = 22;
// 7 bytes allocated, one byte per market for the rate scalar
uint256 private constant RATE_SCALAR_FIRST_BIT = 15;
// Offsets for the bytes of the different parameters
uint256 private constant MARKET_INDEX = (31 - MARKET_INDEX_BIT) * 8;
uint256 private constant RATE_ORACLE_TIME_WINDOW = (31 - RATE_ORACLE_TIME_WINDOW_BIT) * 8;
uint256 private constant TOTAL_FEE = (31 - TOTAL_FEE_BIT) * 8;
uint256 private constant RESERVE_FEE_SHARE = (31 - RESERVE_FEE_SHARE_BIT) * 8;
uint256 private constant DEBT_BUFFER = (31 - DEBT_BUFFER_BIT) * 8;
uint256 private constant FCASH_HAIRCUT = (31 - FCASH_HAIRCUT_BIT) * 8;
uint256 private constant SETTLEMENT_PENALTY = (31 - SETTLEMENT_PENALTY_BIT) * 8;
uint256 private constant LIQUIDATION_FCASH_HAIRCUT = (31 - LIQUIDATION_FCASH_HAIRCUT_BIT) * 8;
uint256 private constant LIQUIDATION_DEBT_BUFFER = (31 - LIQUIDATION_DEBT_BUFFER_BIT) * 8;
uint256 private constant LIQUIDITY_TOKEN_HAIRCUT = (31 - LIQUIDITY_TOKEN_HAIRCUT_FIRST_BIT) * 8;
uint256 private constant RATE_SCALAR = (31 - RATE_SCALAR_FIRST_BIT) * 8;
/// @notice Returns the rate scalar scaled by time to maturity. The rate scalar multiplies
/// the ln() portion of the liquidity curve as an inverse so it increases with time to
/// maturity. The effect of the rate scalar on slippage must decrease with time to maturity.
function getRateScalar(
CashGroupParameters memory cashGroup,
uint256 marketIndex,
uint256 timeToMaturity
) internal pure returns (int256) {
require(1 <= marketIndex && marketIndex <= cashGroup.maxMarketIndex); // dev: invalid market index
uint256 offset = RATE_SCALAR + 8 * (marketIndex - 1);
int256 scalar = int256(uint8(uint256(cashGroup.data >> offset))) * Constants.RATE_PRECISION;
int256 rateScalar =
scalar.mul(int256(Constants.IMPLIED_RATE_TIME)).div(SafeInt256.toInt(timeToMaturity));
// Rate scalar is denominated in RATE_PRECISION, it is unlikely to underflow in the
// division above.
require(rateScalar > 0); // dev: rate scalar underflow
return rateScalar;
}
/// @notice Haircut on liquidity tokens to account for the risk associated with changes in the
/// proportion of cash to fCash within the pool. This is set as a percentage less than or equal to 100.
function getLiquidityHaircut(CashGroupParameters memory cashGroup, uint256 assetType)
internal
pure
returns (uint8)
{
require(
Constants.MIN_LIQUIDITY_TOKEN_INDEX <= assetType &&
assetType <= Constants.MAX_LIQUIDITY_TOKEN_INDEX
); // dev: liquidity haircut invalid asset type
uint256 offset =
LIQUIDITY_TOKEN_HAIRCUT + 8 * (assetType - Constants.MIN_LIQUIDITY_TOKEN_INDEX);
return uint8(uint256(cashGroup.data >> offset));
}
/// @notice Total trading fee denominated in RATE_PRECISION with basis point increments
function getTotalFee(CashGroupParameters memory cashGroup) internal pure returns (uint256) {
return uint256(uint8(uint256(cashGroup.data >> TOTAL_FEE))) * Constants.BASIS_POINT;
}
/// @notice Percentage of the total trading fee that goes to the reserve
function getReserveFeeShare(CashGroupParameters memory cashGroup)
internal
pure
returns (int256)
{
return uint8(uint256(cashGroup.data >> RESERVE_FEE_SHARE));
}
/// @notice fCash haircut for valuation denominated in rate precision with five basis point increments
function getfCashHaircut(CashGroupParameters memory cashGroup) internal pure returns (uint256) {
return
uint256(uint8(uint256(cashGroup.data >> FCASH_HAIRCUT))) * Constants.FIVE_BASIS_POINTS;
}
/// @notice fCash debt buffer for valuation denominated in rate precision with five basis point increments
function getDebtBuffer(CashGroupParameters memory cashGroup) internal pure returns (uint256) {
return uint256(uint8(uint256(cashGroup.data >> DEBT_BUFFER))) * Constants.FIVE_BASIS_POINTS;
}
/// @notice Time window factor for the rate oracle denominated in seconds with five minute increments.
function getRateOracleTimeWindow(CashGroupParameters memory cashGroup)
internal
pure
returns (uint256)
{
// This is denominated in 5 minute increments in storage
return uint256(uint8(uint256(cashGroup.data >> RATE_ORACLE_TIME_WINDOW))) * Constants.FIVE_MINUTES;
}
/// @notice Penalty rate for settling cash debts denominated in basis points
function getSettlementPenalty(CashGroupParameters memory cashGroup)
internal
pure
returns (uint256)
{
return
uint256(uint8(uint256(cashGroup.data >> SETTLEMENT_PENALTY))) * Constants.FIVE_BASIS_POINTS;
}
/// @notice Haircut for positive fCash during liquidation denominated rate precision
/// with five basis point increments
function getLiquidationfCashHaircut(CashGroupParameters memory cashGroup)
internal
pure
returns (uint256)
{
return
uint256(uint8(uint256(cashGroup.data >> LIQUIDATION_FCASH_HAIRCUT))) * Constants.FIVE_BASIS_POINTS;
}
/// @notice Haircut for negative fCash during liquidation denominated rate precision
/// with five basis point increments
function getLiquidationDebtBuffer(CashGroupParameters memory cashGroup)
internal
pure
returns (uint256)
{
return
uint256(uint8(uint256(cashGroup.data >> LIQUIDATION_DEBT_BUFFER))) * Constants.FIVE_BASIS_POINTS;
}
function loadMarket(
CashGroupParameters memory cashGroup,
MarketParameters memory market,
uint256 marketIndex,
bool needsLiquidity,
uint256 blockTime
) internal view {
require(1 <= marketIndex && marketIndex <= cashGroup.maxMarketIndex, "Invalid market");
uint256 maturity =
DateTime.getReferenceTime(blockTime).add(DateTime.getTradedMarket(marketIndex));
market.loadMarket(
cashGroup.currencyId,
maturity,
blockTime,
needsLiquidity,
getRateOracleTimeWindow(cashGroup)
);
}
/// @notice Returns the linear interpolation between two market rates. The formula is
/// slope = (longMarket.oracleRate - shortMarket.oracleRate) / (longMarket.maturity - shortMarket.maturity)
/// interpolatedRate = slope * (assetMaturity - shortMarket.maturity) + shortMarket.oracleRate
function interpolateOracleRate(
uint256 shortMaturity,
uint256 longMaturity,
uint256 shortRate,
uint256 longRate,
uint256 assetMaturity
) internal pure returns (uint256) {
require(shortMaturity < assetMaturity); // dev: cash group interpolation error, short maturity
require(assetMaturity < longMaturity); // dev: cash group interpolation error, long maturity
// It's possible that the rates are inverted where the short market rate > long market rate and
// we will get an underflow here so we check for that
if (longRate >= shortRate) {
return
(longRate - shortRate)
.mul(assetMaturity - shortMaturity)
// No underflow here, checked above
.div(longMaturity - shortMaturity)
.add(shortRate);
} else {
// In this case the slope is negative so:
// interpolatedRate = shortMarket.oracleRate - slope * (assetMaturity - shortMarket.maturity)
// NOTE: this subtraction should never overflow, the linear interpolation between two points above zero
// cannot go below zero
return
shortRate.sub(
// This is reversed to keep it it positive
(shortRate - longRate)
.mul(assetMaturity - shortMaturity)
// No underflow here, checked above
.div(longMaturity - shortMaturity)
);
}
}
/// @dev Gets an oracle rate given any valid maturity.
function calculateOracleRate(
CashGroupParameters memory cashGroup,
uint256 maturity,
uint256 blockTime
) internal view returns (uint256) {
(uint256 marketIndex, bool idiosyncratic) =
DateTime.getMarketIndex(cashGroup.maxMarketIndex, maturity, blockTime);
uint256 timeWindow = getRateOracleTimeWindow(cashGroup);
if (!idiosyncratic) {
return Market.getOracleRate(cashGroup.currencyId, maturity, timeWindow, blockTime);
} else {
uint256 referenceTime = DateTime.getReferenceTime(blockTime);
// DateTime.getMarketIndex returns the market that is past the maturity if idiosyncratic
uint256 longMaturity = referenceTime.add(DateTime.getTradedMarket(marketIndex));
uint256 longRate =
Market.getOracleRate(cashGroup.currencyId, longMaturity, timeWindow, blockTime);
uint256 shortMaturity;
uint256 shortRate;
if (marketIndex == 1) {
// In this case the short market is the annualized asset supply rate
shortMaturity = blockTime;
shortRate = cashGroup.assetRate.getSupplyRate();
} else {
// Minimum value for marketIndex here is 2
shortMaturity = referenceTime.add(DateTime.getTradedMarket(marketIndex - 1));
shortRate = Market.getOracleRate(
cashGroup.currencyId,
shortMaturity,
timeWindow,
blockTime
);
}
return interpolateOracleRate(shortMaturity, longMaturity, shortRate, longRate, maturity);
}
}
function _getCashGroupStorageBytes(uint256 currencyId) private view returns (bytes32 data) {
mapping(uint256 => bytes32) storage store = LibStorage.getCashGroupStorage();
return store[currencyId];
}
/// @dev Helper method for validating maturities in ERC1155Action
function getMaxMarketIndex(uint256 currencyId) internal view returns (uint8) {
bytes32 data = _getCashGroupStorageBytes(currencyId);
return uint8(data[MARKET_INDEX_BIT]);
}
/// @notice Checks all cash group settings for invalid values and sets them into storage
function setCashGroupStorage(uint256 currencyId, CashGroupSettings calldata cashGroup)
internal
{
// Due to the requirements of the yield curve we do not allow a cash group to have solely a 3 month market.
// The reason is that borrowers will not have a further maturity to roll from their 3 month fixed to a 6 month
// fixed. It also complicates the logic in the nToken initialization method. Additionally, we cannot have cash
// groups with 0 market index, it has no effect.
require(2 <= cashGroup.maxMarketIndex && cashGroup.maxMarketIndex <= Constants.MAX_TRADED_MARKET_INDEX,
"CG: invalid market index"
);
require(
cashGroup.reserveFeeShare <= Constants.PERCENTAGE_DECIMALS,
"CG: invalid reserve share"
);
require(cashGroup.liquidityTokenHaircuts.length == cashGroup.maxMarketIndex);
require(cashGroup.rateScalars.length == cashGroup.maxMarketIndex);
// This is required so that fCash liquidation can proceed correctly
require(cashGroup.liquidationfCashHaircut5BPS < cashGroup.fCashHaircut5BPS);
require(cashGroup.liquidationDebtBuffer5BPS < cashGroup.debtBuffer5BPS);
// Market indexes cannot decrease or they will leave fCash assets stranded in the future with no valuation curve
uint8 previousMaxMarketIndex = getMaxMarketIndex(currencyId);
require(
previousMaxMarketIndex <= cashGroup.maxMarketIndex,
"CG: market index cannot decrease"
);
// Per cash group settings
bytes32 data =
(bytes32(uint256(cashGroup.maxMarketIndex)) |
(bytes32(uint256(cashGroup.rateOracleTimeWindow5Min)) << RATE_ORACLE_TIME_WINDOW) |
(bytes32(uint256(cashGroup.totalFeeBPS)) << TOTAL_FEE) |
(bytes32(uint256(cashGroup.reserveFeeShare)) << RESERVE_FEE_SHARE) |
(bytes32(uint256(cashGroup.debtBuffer5BPS)) << DEBT_BUFFER) |
(bytes32(uint256(cashGroup.fCashHaircut5BPS)) << FCASH_HAIRCUT) |
(bytes32(uint256(cashGroup.settlementPenaltyRate5BPS)) << SETTLEMENT_PENALTY) |
(bytes32(uint256(cashGroup.liquidationfCashHaircut5BPS)) <<
LIQUIDATION_FCASH_HAIRCUT) |
(bytes32(uint256(cashGroup.liquidationDebtBuffer5BPS)) << LIQUIDATION_DEBT_BUFFER));
// Per market group settings
for (uint256 i = 0; i < cashGroup.liquidityTokenHaircuts.length; i++) {
require(
cashGroup.liquidityTokenHaircuts[i] <= Constants.PERCENTAGE_DECIMALS,
"CG: invalid token haircut"
);
data =
data |
(bytes32(uint256(cashGroup.liquidityTokenHaircuts[i])) <<
(LIQUIDITY_TOKEN_HAIRCUT + i * 8));
}
for (uint256 i = 0; i < cashGroup.rateScalars.length; i++) {
// Causes a divide by zero error
require(cashGroup.rateScalars[i] != 0, "CG: invalid rate scalar");
data = data | (bytes32(uint256(cashGroup.rateScalars[i])) << (RATE_SCALAR + i * 8));
}
mapping(uint256 => bytes32) storage store = LibStorage.getCashGroupStorage();
store[currencyId] = data;
}
/// @notice Deserialize the cash group storage bytes into a user friendly object
function deserializeCashGroupStorage(uint256 currencyId)
internal
view
returns (CashGroupSettings memory)
{
bytes32 data = _getCashGroupStorageBytes(currencyId);
uint8 maxMarketIndex = uint8(data[MARKET_INDEX_BIT]);
uint8[] memory tokenHaircuts = new uint8[](uint256(maxMarketIndex));
uint8[] memory rateScalars = new uint8[](uint256(maxMarketIndex));
for (uint8 i = 0; i < maxMarketIndex; i++) {
tokenHaircuts[i] = uint8(data[LIQUIDITY_TOKEN_HAIRCUT_FIRST_BIT - i]);
rateScalars[i] = uint8(data[RATE_SCALAR_FIRST_BIT - i]);
}
return
CashGroupSettings({
maxMarketIndex: maxMarketIndex,
rateOracleTimeWindow5Min: uint8(data[RATE_ORACLE_TIME_WINDOW_BIT]),
totalFeeBPS: uint8(data[TOTAL_FEE_BIT]),
reserveFeeShare: uint8(data[RESERVE_FEE_SHARE_BIT]),
debtBuffer5BPS: uint8(data[DEBT_BUFFER_BIT]),
fCashHaircut5BPS: uint8(data[FCASH_HAIRCUT_BIT]),
settlementPenaltyRate5BPS: uint8(data[SETTLEMENT_PENALTY_BIT]),
liquidationfCashHaircut5BPS: uint8(data[LIQUIDATION_FCASH_HAIRCUT_BIT]),
liquidationDebtBuffer5BPS: uint8(data[LIQUIDATION_DEBT_BUFFER_BIT]),
liquidityTokenHaircuts: tokenHaircuts,
rateScalars: rateScalars
});
}
function _buildCashGroup(uint16 currencyId, AssetRateParameters memory assetRate)
private
view
returns (CashGroupParameters memory)
{
bytes32 data = _getCashGroupStorageBytes(currencyId);
uint256 maxMarketIndex = uint8(data[MARKET_INDEX_BIT]);
return
CashGroupParameters({
currencyId: currencyId,
maxMarketIndex: maxMarketIndex,
assetRate: assetRate,
data: data
});
}
/// @notice Builds a cash group using a view version of the asset rate
function buildCashGroupView(uint16 currencyId)
internal
view
returns (CashGroupParameters memory)
{
AssetRateParameters memory assetRate = AssetRate.buildAssetRateView(currencyId);
return _buildCashGroup(currencyId, assetRate);
}
/// @notice Builds a cash group using a stateful version of the asset rate
function buildCashGroupStateful(uint16 currencyId)
internal
returns (CashGroupParameters memory)
{
AssetRateParameters memory assetRate = AssetRate.buildAssetRateStateful(currencyId);
return _buildCashGroup(currencyId, assetRate);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../../global/Types.sol";
import "../../global/LibStorage.sol";
import "../../global/Constants.sol";
import "../../math/SafeInt256.sol";
import "../../../interfaces/notional/AssetRateAdapter.sol";
library AssetRate {
using SafeInt256 for int256;
event SetSettlementRate(uint256 indexed currencyId, uint256 indexed maturity, uint128 rate);
// Asset rates are in 1e18 decimals (cToken exchange rates), internal balances
// are in 1e8 decimals. Therefore we leave this as 1e18 / 1e8 = 1e10
int256 private constant ASSET_RATE_DECIMAL_DIFFERENCE = 1e10;
/// @notice Converts an internal asset cash value to its underlying token value.
/// @param ar exchange rate object between asset and underlying
/// @param assetBalance amount to convert to underlying
function convertToUnderlying(AssetRateParameters memory ar, int256 assetBalance)
internal
pure
returns (int256)
{
// Calculation here represents:
// rate * balance * internalPrecision / rateDecimals * underlyingPrecision
int256 underlyingBalance = ar.rate
.mul(assetBalance)
.div(ASSET_RATE_DECIMAL_DIFFERENCE)
.div(ar.underlyingDecimals);
return underlyingBalance;
}
/// @notice Converts an internal underlying cash value to its asset cash value
/// @param ar exchange rate object between asset and underlying
/// @param underlyingBalance amount to convert to asset cash, denominated in internal token precision
function convertFromUnderlying(AssetRateParameters memory ar, int256 underlyingBalance)
internal
pure
returns (int256)
{
// Calculation here represents:
// rateDecimals * balance * underlyingPrecision / rate * internalPrecision
int256 assetBalance = underlyingBalance
.mul(ASSET_RATE_DECIMAL_DIFFERENCE)
.mul(ar.underlyingDecimals)
.div(ar.rate);
return assetBalance;
}
/// @notice Returns the current per block supply rate, is used when calculating oracle rates
/// for idiosyncratic fCash with a shorter duration than the 3 month maturity.
function getSupplyRate(AssetRateParameters memory ar) internal view returns (uint256) {
// If the rate oracle is not set, the asset is not interest bearing and has an oracle rate of zero.
if (address(ar.rateOracle) == address(0)) return 0;
uint256 rate = ar.rateOracle.getAnnualizedSupplyRate();
// Zero supply rate is valid since this is an interest rate, we do not divide by
// the supply rate so we do not get div by zero errors.
require(rate >= 0); // dev: invalid supply rate
return rate;
}
function _getAssetRateStorage(uint256 currencyId)
private
view
returns (AssetRateAdapter rateOracle, uint8 underlyingDecimalPlaces)
{
mapping(uint256 => AssetRateStorage) storage store = LibStorage.getAssetRateStorage();
AssetRateStorage storage ar = store[currencyId];
rateOracle = AssetRateAdapter(ar.rateOracle);
underlyingDecimalPlaces = ar.underlyingDecimalPlaces;
}
/// @notice Gets an asset rate using a view function, does not accrue interest so the
/// exchange rate will not be up to date. Should only be used for non-stateful methods
function _getAssetRateView(uint256 currencyId)
private
view
returns (
int256,
AssetRateAdapter,
uint8
)
{
(AssetRateAdapter rateOracle, uint8 underlyingDecimalPlaces) = _getAssetRateStorage(currencyId);
int256 rate;
if (address(rateOracle) == address(0)) {
// If no rate oracle is set, then set this to the identity
rate = ASSET_RATE_DECIMAL_DIFFERENCE;
// This will get raised to 10^x and return 1, will not end up with div by zero
underlyingDecimalPlaces = 0;
} else {
rate = rateOracle.getExchangeRateView();
require(rate > 0); // dev: invalid exchange rate
}
return (rate, rateOracle, underlyingDecimalPlaces);
}
/// @notice Gets an asset rate using a stateful function, accrues interest so the
/// exchange rate will be up to date for the current block.
function _getAssetRateStateful(uint256 currencyId)
private
returns (
int256,
AssetRateAdapter,
uint8
)
{
(AssetRateAdapter rateOracle, uint8 underlyingDecimalPlaces) = _getAssetRateStorage(currencyId);
int256 rate;
if (address(rateOracle) == address(0)) {
// If no rate oracle is set, then set this to the identity
rate = ASSET_RATE_DECIMAL_DIFFERENCE;
// This will get raised to 10^x and return 1, will not end up with div by zero
underlyingDecimalPlaces = 0;
} else {
rate = rateOracle.getExchangeRateStateful();
require(rate > 0); // dev: invalid exchange rate
}
return (rate, rateOracle, underlyingDecimalPlaces);
}
/// @notice Returns an asset rate object using the view method
function buildAssetRateView(uint256 currencyId)
internal
view
returns (AssetRateParameters memory)
{
(int256 rate, AssetRateAdapter rateOracle, uint8 underlyingDecimalPlaces) =
_getAssetRateView(currencyId);
return
AssetRateParameters({
rateOracle: rateOracle,
rate: rate,
// No overflow, restricted on storage
underlyingDecimals: int256(10**underlyingDecimalPlaces)
});
}
/// @notice Returns an asset rate object using the stateful method
function buildAssetRateStateful(uint256 currencyId)
internal
returns (AssetRateParameters memory)
{
(int256 rate, AssetRateAdapter rateOracle, uint8 underlyingDecimalPlaces) =
_getAssetRateStateful(currencyId);
return
AssetRateParameters({
rateOracle: rateOracle,
rate: rate,
// No overflow, restricted on storage
underlyingDecimals: int256(10**underlyingDecimalPlaces)
});
}
/// @dev Gets a settlement rate object
function _getSettlementRateStorage(uint256 currencyId, uint256 maturity)
private
view
returns (
int256 settlementRate,
uint8 underlyingDecimalPlaces
)
{
mapping(uint256 => mapping(uint256 => SettlementRateStorage)) storage store = LibStorage.getSettlementRateStorage();
SettlementRateStorage storage rateStorage = store[currencyId][maturity];
settlementRate = rateStorage.settlementRate;
underlyingDecimalPlaces = rateStorage.underlyingDecimalPlaces;
}
/// @notice Returns a settlement rate object using the view method
function buildSettlementRateView(uint256 currencyId, uint256 maturity)
internal
view
returns (AssetRateParameters memory)
{
// prettier-ignore
(
int256 settlementRate,
uint8 underlyingDecimalPlaces
) = _getSettlementRateStorage(currencyId, maturity);
// Asset exchange rates cannot be zero
if (settlementRate == 0) {
// If settlement rate has not been set then we need to fetch it
// prettier-ignore
(
settlementRate,
/* address */,
underlyingDecimalPlaces
) = _getAssetRateView(currencyId);
}
return AssetRateParameters(
AssetRateAdapter(address(0)),
settlementRate,
// No overflow, restricted on storage
int256(10**underlyingDecimalPlaces)
);
}
/// @notice Returns a settlement rate object and sets the rate if it has not been set yet
function buildSettlementRateStateful(
uint256 currencyId,
uint256 maturity,
uint256 blockTime
) internal returns (AssetRateParameters memory) {
(int256 settlementRate, uint8 underlyingDecimalPlaces) =
_getSettlementRateStorage(currencyId, maturity);
if (settlementRate == 0) {
// Settlement rate has not yet been set, set it in this branch
AssetRateAdapter rateOracle;
// If rate oracle == 0 then this will return the identity settlement rate
// prettier-ignore
(
settlementRate,
rateOracle,
underlyingDecimalPlaces
) = _getAssetRateStateful(currencyId);
if (address(rateOracle) != address(0)) {
mapping(uint256 => mapping(uint256 => SettlementRateStorage)) storage store = LibStorage.getSettlementRateStorage();
// Only need to set settlement rates when the rate oracle is set (meaning the asset token has
// a conversion rate to an underlying). If not set then the asset cash always settles to underlying at a 1-1
// rate since they are the same.
require(0 < blockTime && maturity <= blockTime && blockTime <= type(uint40).max); // dev: settlement rate timestamp overflow
require(0 < settlementRate && settlementRate <= type(uint128).max); // dev: settlement rate overflow
SettlementRateStorage storage rateStorage = store[currencyId][maturity];
rateStorage.blockTime = uint40(blockTime);
rateStorage.settlementRate = uint128(settlementRate);
rateStorage.underlyingDecimalPlaces = underlyingDecimalPlaces;
emit SetSettlementRate(currencyId, maturity, uint128(settlementRate));
}
}
return AssetRateParameters(
AssetRateAdapter(address(0)),
settlementRate,
// No overflow, restricted on storage
int256(10**underlyingDecimalPlaces)
);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "./PortfolioHandler.sol";
import "./BitmapAssetsHandler.sol";
import "../AccountContextHandler.sol";
import "../../global/Types.sol";
import "../../math/SafeInt256.sol";
/// @notice Helper library for transferring assets from one portfolio to another
library TransferAssets {
using AccountContextHandler for AccountContext;
using PortfolioHandler for PortfolioState;
using SafeInt256 for int256;
/// @notice Decodes asset ids
function decodeAssetId(uint256 id)
internal
pure
returns (
uint256 currencyId,
uint256 maturity,
uint256 assetType
)
{
assetType = uint8(id);
maturity = uint40(id >> 8);
currencyId = uint16(id >> 48);
}
/// @notice Encodes asset ids
function encodeAssetId(
uint256 currencyId,
uint256 maturity,
uint256 assetType
) internal pure returns (uint256) {
require(currencyId <= Constants.MAX_CURRENCIES);
require(maturity <= type(uint40).max);
require(assetType <= Constants.MAX_LIQUIDITY_TOKEN_INDEX);
return
uint256(
(bytes32(uint256(uint16(currencyId))) << 48) |
(bytes32(uint256(uint40(maturity))) << 8) |
bytes32(uint256(uint8(assetType)))
);
}
/// @dev Used to flip the sign of assets to decrement the `from` account that is sending assets
function invertNotionalAmountsInPlace(PortfolioAsset[] memory assets) internal pure {
for (uint256 i; i < assets.length; i++) {
assets[i].notional = assets[i].notional.neg();
}
}
/// @dev Useful method for hiding the logic of updating an account. WARNING: the account
/// context returned from this method may not be the same memory location as the account
/// context provided if the account is settled.
function placeAssetsInAccount(
address account,
AccountContext memory accountContext,
PortfolioAsset[] memory assets
) internal returns (AccountContext memory) {
// If an account has assets that require settlement then placing assets inside it
// may cause issues.
require(!accountContext.mustSettleAssets(), "Account must settle");
if (accountContext.isBitmapEnabled()) {
// Adds fCash assets into the account and finalized storage
BitmapAssetsHandler.addMultipleifCashAssets(account, accountContext, assets);
} else {
PortfolioState memory portfolioState = PortfolioHandler.buildPortfolioState(
account,
accountContext.assetArrayLength,
assets.length
);
// This will add assets in memory
portfolioState.addMultipleAssets(assets);
// This will store assets and update the account context in memory
accountContext.storeAssetsAndUpdateContext(account, portfolioState, false);
}
return accountContext;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "./AssetHandler.sol";
import "./ExchangeRate.sol";
import "../markets/CashGroup.sol";
import "../AccountContextHandler.sol";
import "../balances/BalanceHandler.sol";
import "../portfolio/PortfolioHandler.sol";
import "../nToken/nTokenHandler.sol";
import "../nToken/nTokenCalculations.sol";
import "../../math/SafeInt256.sol";
library FreeCollateral {
using SafeInt256 for int256;
using Bitmap for bytes;
using ExchangeRate for ETHRate;
using AssetRate for AssetRateParameters;
using AccountContextHandler for AccountContext;
using nTokenHandler for nTokenPortfolio;
/// @dev This is only used within the library to clean up the stack
struct FreeCollateralFactors {
int256 netETHValue;
bool updateContext;
uint256 portfolioIndex;
CashGroupParameters cashGroup;
MarketParameters market;
PortfolioAsset[] portfolio;
AssetRateParameters assetRate;
nTokenPortfolio nToken;
}
/// @notice Checks if an asset is active in the portfolio
function _isActiveInPortfolio(bytes2 currencyBytes) private pure returns (bool) {
return currencyBytes & Constants.ACTIVE_IN_PORTFOLIO == Constants.ACTIVE_IN_PORTFOLIO;
}
/// @notice Checks if currency balances are active in the account returns them if true
/// @return cash balance, nTokenBalance
function _getCurrencyBalances(address account, bytes2 currencyBytes)
private
view
returns (int256, int256)
{
if (currencyBytes & Constants.ACTIVE_IN_BALANCES == Constants.ACTIVE_IN_BALANCES) {
uint256 currencyId = uint16(currencyBytes & Constants.UNMASK_FLAGS);
// prettier-ignore
(
int256 cashBalance,
int256 nTokenBalance,
/* lastClaimTime */,
/* accountIncentiveDebt */
) = BalanceHandler.getBalanceStorage(account, currencyId);
return (cashBalance, nTokenBalance);
}
return (0, 0);
}
/// @notice Calculates the nToken asset value with a haircut set by governance
/// @return the value of the account's nTokens after haircut, the nToken parameters
function _getNTokenHaircutAssetPV(
CashGroupParameters memory cashGroup,
nTokenPortfolio memory nToken,
int256 tokenBalance,
uint256 blockTime
) internal view returns (int256, bytes6) {
nToken.loadNTokenPortfolioNoCashGroup(cashGroup.currencyId);
nToken.cashGroup = cashGroup;
int256 nTokenAssetPV = nTokenCalculations.getNTokenAssetPV(nToken, blockTime);
// (tokenBalance * nTokenValue * haircut) / totalSupply
int256 nTokenHaircutAssetPV =
tokenBalance
.mul(nTokenAssetPV)
.mul(uint8(nToken.parameters[Constants.PV_HAIRCUT_PERCENTAGE]))
.div(Constants.PERCENTAGE_DECIMALS)
.div(nToken.totalSupply);
// nToken.parameters is returned for use in liquidation
return (nTokenHaircutAssetPV, nToken.parameters);
}
/// @notice Calculates portfolio and/or nToken values while using the supplied cash groups and
/// markets. The reason these are grouped together is because they both require storage reads of the same
/// values.
function _getPortfolioAndNTokenAssetValue(
FreeCollateralFactors memory factors,
int256 nTokenBalance,
uint256 blockTime
)
private
view
returns (
int256 netPortfolioValue,
int256 nTokenHaircutAssetValue,
bytes6 nTokenParameters
)
{
// If the next asset matches the currency id then we need to calculate the cash group value
if (
factors.portfolioIndex < factors.portfolio.length &&
factors.portfolio[factors.portfolioIndex].currencyId == factors.cashGroup.currencyId
) {
// netPortfolioValue is in asset cash
(netPortfolioValue, factors.portfolioIndex) = AssetHandler.getNetCashGroupValue(
factors.portfolio,
factors.cashGroup,
factors.market,
blockTime,
factors.portfolioIndex
);
} else {
netPortfolioValue = 0;
}
if (nTokenBalance > 0) {
(nTokenHaircutAssetValue, nTokenParameters) = _getNTokenHaircutAssetPV(
factors.cashGroup,
factors.nToken,
nTokenBalance,
blockTime
);
} else {
nTokenHaircutAssetValue = 0;
nTokenParameters = 0;
}
}
/// @notice Returns balance values for the bitmapped currency
function _getBitmapBalanceValue(
address account,
uint256 blockTime,
AccountContext memory accountContext,
FreeCollateralFactors memory factors
)
private
view
returns (
int256 cashBalance,
int256 nTokenHaircutAssetValue,
bytes6 nTokenParameters
)
{
int256 nTokenBalance;
// prettier-ignore
(
cashBalance,
nTokenBalance,
/* lastClaimTime */,
/* accountIncentiveDebt */
) = BalanceHandler.getBalanceStorage(account, accountContext.bitmapCurrencyId);
if (nTokenBalance > 0) {
(nTokenHaircutAssetValue, nTokenParameters) = _getNTokenHaircutAssetPV(
factors.cashGroup,
factors.nToken,
nTokenBalance,
blockTime
);
} else {
nTokenHaircutAssetValue = 0;
}
}
/// @notice Returns portfolio value for the bitmapped currency
function _getBitmapPortfolioValue(
address account,
uint256 blockTime,
AccountContext memory accountContext,
FreeCollateralFactors memory factors
) private view returns (int256) {
(int256 netPortfolioValueUnderlying, bool bitmapHasDebt) =
BitmapAssetsHandler.getifCashNetPresentValue(
account,
accountContext.bitmapCurrencyId,
accountContext.nextSettleTime,
blockTime,
factors.cashGroup,
true // risk adjusted
);
// Turns off has debt flag if it has changed
bool contextHasAssetDebt =
accountContext.hasDebt & Constants.HAS_ASSET_DEBT == Constants.HAS_ASSET_DEBT;
if (bitmapHasDebt && !contextHasAssetDebt) {
// Turn on has debt
accountContext.hasDebt = accountContext.hasDebt | Constants.HAS_ASSET_DEBT;
factors.updateContext = true;
} else if (!bitmapHasDebt && contextHasAssetDebt) {
// Turn off has debt
accountContext.hasDebt = accountContext.hasDebt & ~Constants.HAS_ASSET_DEBT;
factors.updateContext = true;
}
// Return asset cash value
return factors.cashGroup.assetRate.convertFromUnderlying(netPortfolioValueUnderlying);
}
function _updateNetETHValue(
uint256 currencyId,
int256 netLocalAssetValue,
FreeCollateralFactors memory factors
) private view returns (ETHRate memory) {
ETHRate memory ethRate = ExchangeRate.buildExchangeRate(currencyId);
// Converts to underlying first, ETH exchange rates are in underlying
factors.netETHValue = factors.netETHValue.add(
ethRate.convertToETH(factors.assetRate.convertToUnderlying(netLocalAssetValue))
);
return ethRate;
}
/// @notice Stateful version of get free collateral, returns the total net ETH value and true or false if the account
/// context needs to be updated.
function getFreeCollateralStateful(
address account,
AccountContext memory accountContext,
uint256 blockTime
) internal returns (int256, bool) {
FreeCollateralFactors memory factors;
bool hasCashDebt;
if (accountContext.isBitmapEnabled()) {
factors.cashGroup = CashGroup.buildCashGroupStateful(accountContext.bitmapCurrencyId);
// prettier-ignore
(
int256 netCashBalance,
int256 nTokenHaircutAssetValue,
/* nTokenParameters */
) = _getBitmapBalanceValue(account, blockTime, accountContext, factors);
if (netCashBalance < 0) hasCashDebt = true;
int256 portfolioAssetValue =
_getBitmapPortfolioValue(account, blockTime, accountContext, factors);
int256 netLocalAssetValue =
netCashBalance.add(nTokenHaircutAssetValue).add(portfolioAssetValue);
factors.assetRate = factors.cashGroup.assetRate;
_updateNetETHValue(accountContext.bitmapCurrencyId, netLocalAssetValue, factors);
} else {
factors.portfolio = PortfolioHandler.getSortedPortfolio(
account,
accountContext.assetArrayLength
);
}
bytes18 currencies = accountContext.activeCurrencies;
while (currencies != 0) {
bytes2 currencyBytes = bytes2(currencies);
uint16 currencyId = uint16(currencyBytes & Constants.UNMASK_FLAGS);
// Explicitly ensures that bitmap currency cannot be double counted
require(currencyId != accountContext.bitmapCurrencyId);
(int256 netLocalAssetValue, int256 nTokenBalance) =
_getCurrencyBalances(account, currencyBytes);
if (netLocalAssetValue < 0) hasCashDebt = true;
if (_isActiveInPortfolio(currencyBytes) || nTokenBalance > 0) {
factors.cashGroup = CashGroup.buildCashGroupStateful(currencyId);
// prettier-ignore
(
int256 netPortfolioAssetValue,
int256 nTokenHaircutAssetValue,
/* nTokenParameters */
) = _getPortfolioAndNTokenAssetValue(factors, nTokenBalance, blockTime);
netLocalAssetValue = netLocalAssetValue
.add(netPortfolioAssetValue)
.add(nTokenHaircutAssetValue);
factors.assetRate = factors.cashGroup.assetRate;
} else {
// NOTE: we must set the proper assetRate when we updateNetETHValue
factors.assetRate = AssetRate.buildAssetRateStateful(currencyId);
}
_updateNetETHValue(currencyId, netLocalAssetValue, factors);
currencies = currencies << 16;
}
// Free collateral is the only method that examines all cash balances for an account at once. If there is no cash debt (i.e.
// they have been repaid or settled via more debt) then this will turn off the flag. It's possible that this flag is out of
// sync temporarily after a cash settlement and before the next free collateral check. The only downside for that is forcing
// an account to do an extra free collateral check to turn off this setting.
if (
accountContext.hasDebt & Constants.HAS_CASH_DEBT == Constants.HAS_CASH_DEBT &&
!hasCashDebt
) {
accountContext.hasDebt = accountContext.hasDebt & ~Constants.HAS_CASH_DEBT;
factors.updateContext = true;
}
return (factors.netETHValue, factors.updateContext);
}
/// @notice View version of getFreeCollateral, does not use the stateful version of build cash group and skips
/// all the update context logic.
function getFreeCollateralView(
address account,
AccountContext memory accountContext,
uint256 blockTime
) internal view returns (int256, int256[] memory) {
FreeCollateralFactors memory factors;
uint256 netLocalIndex;
int256[] memory netLocalAssetValues = new int256[](10);
if (accountContext.isBitmapEnabled()) {
factors.cashGroup = CashGroup.buildCashGroupView(accountContext.bitmapCurrencyId);
// prettier-ignore
(
int256 netCashBalance,
int256 nTokenHaircutAssetValue,
/* nTokenParameters */
) = _getBitmapBalanceValue(account, blockTime, accountContext, factors);
int256 portfolioAssetValue =
_getBitmapPortfolioValue(account, blockTime, accountContext, factors);
netLocalAssetValues[netLocalIndex] = netCashBalance
.add(nTokenHaircutAssetValue)
.add(portfolioAssetValue);
factors.assetRate = factors.cashGroup.assetRate;
_updateNetETHValue(
accountContext.bitmapCurrencyId,
netLocalAssetValues[netLocalIndex],
factors
);
netLocalIndex++;
} else {
factors.portfolio = PortfolioHandler.getSortedPortfolio(
account,
accountContext.assetArrayLength
);
}
bytes18 currencies = accountContext.activeCurrencies;
while (currencies != 0) {
bytes2 currencyBytes = bytes2(currencies);
uint16 currencyId = uint16(currencyBytes & Constants.UNMASK_FLAGS);
// Explicitly ensures that bitmap currency cannot be double counted
require(currencyId != accountContext.bitmapCurrencyId);
int256 nTokenBalance;
(netLocalAssetValues[netLocalIndex], nTokenBalance) = _getCurrencyBalances(
account,
currencyBytes
);
if (_isActiveInPortfolio(currencyBytes) || nTokenBalance > 0) {
factors.cashGroup = CashGroup.buildCashGroupView(currencyId);
// prettier-ignore
(
int256 netPortfolioValue,
int256 nTokenHaircutAssetValue,
/* nTokenParameters */
) = _getPortfolioAndNTokenAssetValue(factors, nTokenBalance, blockTime);
netLocalAssetValues[netLocalIndex] = netLocalAssetValues[netLocalIndex]
.add(netPortfolioValue)
.add(nTokenHaircutAssetValue);
factors.assetRate = factors.cashGroup.assetRate;
} else {
factors.assetRate = AssetRate.buildAssetRateView(currencyId);
}
_updateNetETHValue(currencyId, netLocalAssetValues[netLocalIndex], factors);
netLocalIndex++;
currencies = currencies << 16;
}
return (factors.netETHValue, netLocalAssetValues);
}
/// @notice Calculates the net value of a currency within a portfolio, this is a bit
/// convoluted to fit into the stack frame
function _calculateLiquidationAssetValue(
FreeCollateralFactors memory factors,
LiquidationFactors memory liquidationFactors,
bytes2 currencyBytes,
bool setLiquidationFactors,
uint256 blockTime
) private returns (int256) {
uint16 currencyId = uint16(currencyBytes & Constants.UNMASK_FLAGS);
(int256 netLocalAssetValue, int256 nTokenBalance) =
_getCurrencyBalances(liquidationFactors.account, currencyBytes);
if (_isActiveInPortfolio(currencyBytes) || nTokenBalance > 0) {
factors.cashGroup = CashGroup.buildCashGroupStateful(currencyId);
(int256 netPortfolioValue, int256 nTokenHaircutAssetValue, bytes6 nTokenParameters) =
_getPortfolioAndNTokenAssetValue(factors, nTokenBalance, blockTime);
netLocalAssetValue = netLocalAssetValue
.add(netPortfolioValue)
.add(nTokenHaircutAssetValue);
factors.assetRate = factors.cashGroup.assetRate;
// If collateralCurrencyId is set to zero then this is a local currency liquidation
if (setLiquidationFactors) {
liquidationFactors.collateralCashGroup = factors.cashGroup;
liquidationFactors.nTokenParameters = nTokenParameters;
liquidationFactors.nTokenHaircutAssetValue = nTokenHaircutAssetValue;
}
} else {
factors.assetRate = AssetRate.buildAssetRateStateful(currencyId);
}
return netLocalAssetValue;
}
/// @notice A version of getFreeCollateral used during liquidation to save off necessary additional information.
function getLiquidationFactors(
address account,
AccountContext memory accountContext,
uint256 blockTime,
uint256 localCurrencyId,
uint256 collateralCurrencyId
) internal returns (LiquidationFactors memory, PortfolioAsset[] memory) {
FreeCollateralFactors memory factors;
LiquidationFactors memory liquidationFactors;
// This is only set to reduce the stack size
liquidationFactors.account = account;
if (accountContext.isBitmapEnabled()) {
factors.cashGroup = CashGroup.buildCashGroupStateful(accountContext.bitmapCurrencyId);
(int256 netCashBalance, int256 nTokenHaircutAssetValue, bytes6 nTokenParameters) =
_getBitmapBalanceValue(account, blockTime, accountContext, factors);
int256 portfolioBalance =
_getBitmapPortfolioValue(account, blockTime, accountContext, factors);
int256 netLocalAssetValue =
netCashBalance.add(nTokenHaircutAssetValue).add(portfolioBalance);
factors.assetRate = factors.cashGroup.assetRate;
ETHRate memory ethRate =
_updateNetETHValue(accountContext.bitmapCurrencyId, netLocalAssetValue, factors);
// If the bitmap currency id can only ever be the local currency where debt is held.
// During enable bitmap we check that the account has no assets in their portfolio and
// no cash debts.
if (accountContext.bitmapCurrencyId == localCurrencyId) {
liquidationFactors.localAssetAvailable = netLocalAssetValue;
liquidationFactors.localETHRate = ethRate;
liquidationFactors.localAssetRate = factors.assetRate;
// This will be the case during local currency or local fCash liquidation
if (collateralCurrencyId == 0) {
// If this is local fCash liquidation, the cash group information is required
// to calculate fCash haircuts and buffers.
liquidationFactors.collateralCashGroup = factors.cashGroup;
liquidationFactors.nTokenHaircutAssetValue = nTokenHaircutAssetValue;
liquidationFactors.nTokenParameters = nTokenParameters;
}
}
} else {
factors.portfolio = PortfolioHandler.getSortedPortfolio(
account,
accountContext.assetArrayLength
);
}
bytes18 currencies = accountContext.activeCurrencies;
while (currencies != 0) {
bytes2 currencyBytes = bytes2(currencies);
// This next bit of code here is annoyingly structured to get around stack size issues
bool setLiquidationFactors;
{
uint256 tempId = uint256(uint16(currencyBytes & Constants.UNMASK_FLAGS));
// Explicitly ensures that bitmap currency cannot be double counted
require(tempId != accountContext.bitmapCurrencyId);
setLiquidationFactors =
(tempId == localCurrencyId && collateralCurrencyId == 0) ||
tempId == collateralCurrencyId;
}
int256 netLocalAssetValue =
_calculateLiquidationAssetValue(
factors,
liquidationFactors,
currencyBytes,
setLiquidationFactors,
blockTime
);
uint256 currencyId = uint256(uint16(currencyBytes & Constants.UNMASK_FLAGS));
ETHRate memory ethRate = _updateNetETHValue(currencyId, netLocalAssetValue, factors);
if (currencyId == collateralCurrencyId) {
// Ensure that this is set even if the cash group is not loaded, it will not be
// loaded if the account only has a cash balance and no nTokens or assets
liquidationFactors.collateralCashGroup.assetRate = factors.assetRate;
liquidationFactors.collateralAssetAvailable = netLocalAssetValue;
liquidationFactors.collateralETHRate = ethRate;
} else if (currencyId == localCurrencyId) {
// This branch will not be entered if bitmap is enabled
liquidationFactors.localAssetAvailable = netLocalAssetValue;
liquidationFactors.localETHRate = ethRate;
liquidationFactors.localAssetRate = factors.assetRate;
// If this is local fCash liquidation, the cash group information is required
// to calculate fCash haircuts and buffers and it will have been set in
// _calculateLiquidationAssetValue above because the account must have fCash assets,
// there is no need to set cash group in this branch.
}
currencies = currencies << 16;
}
liquidationFactors.netETHValue = factors.netETHValue;
require(liquidationFactors.netETHValue < 0, "Sufficient collateral");
// Refetch the portfolio if it exists, AssetHandler.getNetCashValue updates values in memory to do fCash
// netting which will make further calculations incorrect.
if (accountContext.assetArrayLength > 0) {
factors.portfolio = PortfolioHandler.getSortedPortfolio(
account,
accountContext.assetArrayLength
);
}
return (liquidationFactors, factors.portfolio);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../valuation/AssetHandler.sol";
import "../markets/Market.sol";
import "../markets/AssetRate.sol";
import "../portfolio/PortfolioHandler.sol";
import "../../math/SafeInt256.sol";
import "../../global/Constants.sol";
import "../../global/Types.sol";
library SettlePortfolioAssets {
using SafeInt256 for int256;
using AssetRate for AssetRateParameters;
using Market for MarketParameters;
using PortfolioHandler for PortfolioState;
using AssetHandler for PortfolioAsset;
/// @dev Returns a SettleAmount array for the assets that will be settled
function _getSettleAmountArray(PortfolioState memory portfolioState, uint256 blockTime)
private
pure
returns (SettleAmount[] memory)
{
uint256 currenciesSettled;
uint256 lastCurrencyId = 0;
if (portfolioState.storedAssets.length == 0) return new SettleAmount[](0);
// Loop backwards so "lastCurrencyId" will be set to the first currency in the portfolio
// NOTE: if this contract is ever upgraded to Solidity 0.8+ then this i-- will underflow and cause
// a revert, must wrap in an unchecked.
for (uint256 i = portfolioState.storedAssets.length; (i--) > 0;) {
PortfolioAsset memory asset = portfolioState.storedAssets[i];
// Assets settle on exactly blockTime
if (asset.getSettlementDate() > blockTime) continue;
// Assume that this is sorted by cash group and maturity, currencyId = 0 is unused so this
// will work for the first asset
if (lastCurrencyId != asset.currencyId) {
lastCurrencyId = asset.currencyId;
currenciesSettled++;
}
}
// Actual currency ids will be set as we loop through the portfolio and settle assets
SettleAmount[] memory settleAmounts = new SettleAmount[](currenciesSettled);
if (currenciesSettled > 0) settleAmounts[0].currencyId = lastCurrencyId;
return settleAmounts;
}
/// @notice Settles a portfolio array
function settlePortfolio(PortfolioState memory portfolioState, uint256 blockTime)
internal
returns (SettleAmount[] memory)
{
AssetRateParameters memory settlementRate;
SettleAmount[] memory settleAmounts = _getSettleAmountArray(portfolioState, blockTime);
MarketParameters memory market;
if (settleAmounts.length == 0) return settleAmounts;
uint256 settleAmountIndex;
for (uint256 i; i < portfolioState.storedAssets.length; i++) {
PortfolioAsset memory asset = portfolioState.storedAssets[i];
uint256 settleDate = asset.getSettlementDate();
// Settlement date is on block time exactly
if (settleDate > blockTime) continue;
// On the first loop the lastCurrencyId is already set.
if (settleAmounts[settleAmountIndex].currencyId != asset.currencyId) {
// New currency in the portfolio
settleAmountIndex += 1;
settleAmounts[settleAmountIndex].currencyId = asset.currencyId;
}
int256 assetCash;
if (asset.assetType == Constants.FCASH_ASSET_TYPE) {
// Gets or sets the settlement rate, only do this before settling fCash
settlementRate = AssetRate.buildSettlementRateStateful(
asset.currencyId,
asset.maturity,
blockTime
);
assetCash = settlementRate.convertFromUnderlying(asset.notional);
portfolioState.deleteAsset(i);
} else if (AssetHandler.isLiquidityToken(asset.assetType)) {
Market.loadSettlementMarket(market, asset.currencyId, asset.maturity, settleDate);
int256 fCash;
(assetCash, fCash) = market.removeLiquidity(asset.notional);
// Assets mature exactly on block time
if (asset.maturity > blockTime) {
// If fCash has not yet matured then add it to the portfolio
_settleLiquidityTokenTofCash(portfolioState, i, fCash);
} else {
// Gets or sets the settlement rate, only do this before settling fCash
settlementRate = AssetRate.buildSettlementRateStateful(
asset.currencyId,
asset.maturity,
blockTime
);
// If asset has matured then settle fCash to asset cash
assetCash = assetCash.add(settlementRate.convertFromUnderlying(fCash));
portfolioState.deleteAsset(i);
}
}
settleAmounts[settleAmountIndex].netCashChange = settleAmounts[settleAmountIndex]
.netCashChange
.add(assetCash);
}
return settleAmounts;
}
/// @notice Settles a liquidity token to idiosyncratic fCash, this occurs when the maturity is still in the future
function _settleLiquidityTokenTofCash(
PortfolioState memory portfolioState,
uint256 index,
int256 fCash
) private pure {
PortfolioAsset memory liquidityToken = portfolioState.storedAssets[index];
// If the liquidity token's maturity is still in the future then we change the entry to be
// an idiosyncratic fCash entry with the net fCash amount.
if (index != 0) {
// Check to see if the previous index is the matching fCash asset, this will be the case when the
// portfolio is sorted
PortfolioAsset memory fCashAsset = portfolioState.storedAssets[index - 1];
if (
fCashAsset.currencyId == liquidityToken.currencyId &&
fCashAsset.maturity == liquidityToken.maturity &&
fCashAsset.assetType == Constants.FCASH_ASSET_TYPE
) {
// This fCash asset has not matured if we are settling to fCash
fCashAsset.notional = fCashAsset.notional.add(fCash);
fCashAsset.storageState = AssetStorageState.Update;
portfolioState.deleteAsset(index);
}
}
// We are going to delete this asset anyway, convert to an fCash position
liquidityToken.assetType = Constants.FCASH_ASSET_TYPE;
liquidityToken.notional = fCash;
liquidityToken.storageState = AssetStorageState.Update;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../markets/AssetRate.sol";
import "../../global/LibStorage.sol";
import "../portfolio/BitmapAssetsHandler.sol";
import "../../math/SafeInt256.sol";
import "../../math/Bitmap.sol";
import "../../global/Constants.sol";
import "../../global/Types.sol";
/**
* Settles a bitmap portfolio by checking for all matured fCash assets and turning them into cash
* at the prevailing settlement rate. It will also update the asset bitmap to ensure that it continues
* to correctly reference all actual maturities. fCash asset notional values are stored in *absolute*
* time terms and bitmap bits are *relative* time terms based on the bitNumber and the stored oldSettleTime.
* Remapping bits requires converting the old relative bit numbers to new relative bit numbers based on
* newSettleTime and the absolute times (maturities) that the previous bitmap references.
*/
library SettleBitmapAssets {
using SafeInt256 for int256;
using AssetRate for AssetRateParameters;
using Bitmap for bytes32;
/// @notice Given a bitmap for a cash group and timestamps, will settle all assets
/// that have matured and remap the bitmap to correspond to the current time.
function settleBitmappedCashGroup(
address account,
uint256 currencyId,
uint256 oldSettleTime,
uint256 blockTime
) internal returns (int256 totalAssetCash, uint256 newSettleTime) {
bytes32 bitmap = BitmapAssetsHandler.getAssetsBitmap(account, currencyId);
// This newSettleTime will be set to the new `oldSettleTime`. The bits between 1 and
// `lastSettleBit` (inclusive) will be shifted out of the bitmap and settled. The reason
// that lastSettleBit is inclusive is that it refers to newSettleTime which always less
// than the current block time.
newSettleTime = DateTime.getTimeUTC0(blockTime);
// If newSettleTime == oldSettleTime lastSettleBit will be zero
require(newSettleTime >= oldSettleTime); // dev: new settle time before previous
// Do not need to worry about validity, if newSettleTime is not on an exact bit we will settle up until
// the closest maturity that is less than newSettleTime.
(uint256 lastSettleBit, /* isValid */) = DateTime.getBitNumFromMaturity(oldSettleTime, newSettleTime);
if (lastSettleBit == 0) return (totalAssetCash, newSettleTime);
// Returns the next bit that is set in the bitmap
uint256 nextBitNum = bitmap.getNextBitNum();
while (nextBitNum != 0 && nextBitNum <= lastSettleBit) {
uint256 maturity = DateTime.getMaturityFromBitNum(oldSettleTime, nextBitNum);
totalAssetCash = totalAssetCash.add(
_settlefCashAsset(account, currencyId, maturity, blockTime)
);
// Turn the bit off now that it is settled
bitmap = bitmap.setBit(nextBitNum, false);
nextBitNum = bitmap.getNextBitNum();
}
bytes32 newBitmap;
while (nextBitNum != 0) {
uint256 maturity = DateTime.getMaturityFromBitNum(oldSettleTime, nextBitNum);
(uint256 newBitNum, bool isValid) = DateTime.getBitNumFromMaturity(newSettleTime, maturity);
require(isValid); // dev: invalid new bit num
newBitmap = newBitmap.setBit(newBitNum, true);
// Turn the bit off now that it is remapped
bitmap = bitmap.setBit(nextBitNum, false);
nextBitNum = bitmap.getNextBitNum();
}
BitmapAssetsHandler.setAssetsBitmap(account, currencyId, newBitmap);
}
/// @dev Stateful settlement function to settle a bitmapped asset. Deletes the
/// asset from storage after calculating it.
function _settlefCashAsset(
address account,
uint256 currencyId,
uint256 maturity,
uint256 blockTime
) private returns (int256 assetCash) {
mapping(address => mapping(uint256 =>
mapping(uint256 => ifCashStorage))) storage store = LibStorage.getifCashBitmapStorage();
int256 notional = store[account][currencyId][maturity].notional;
// Gets the current settlement rate or will store a new settlement rate if it does not
// yet exist.
AssetRateParameters memory rate =
AssetRate.buildSettlementRateStateful(currencyId, maturity, blockTime);
assetCash = rate.convertFromUnderlying(notional);
delete store[account][currencyId][maturity];
return assetCash;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../../global/Types.sol";
import "../../global/Constants.sol";
import "../markets/CashGroup.sol";
import "../markets/AssetRate.sol";
import "../markets/DateTime.sol";
import "../portfolio/PortfolioHandler.sol";
import "../../math/SafeInt256.sol";
import "../../math/ABDKMath64x64.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
library AssetHandler {
using SafeMath for uint256;
using SafeInt256 for int256;
using CashGroup for CashGroupParameters;
using AssetRate for AssetRateParameters;
function isLiquidityToken(uint256 assetType) internal pure returns (bool) {
return
assetType >= Constants.MIN_LIQUIDITY_TOKEN_INDEX &&
assetType <= Constants.MAX_LIQUIDITY_TOKEN_INDEX;
}
/// @notice Liquidity tokens settle every 90 days (not at the designated maturity). This method
/// calculates the settlement date for any PortfolioAsset.
function getSettlementDate(PortfolioAsset memory asset) internal pure returns (uint256) {
require(asset.assetType > 0 && asset.assetType <= Constants.MAX_LIQUIDITY_TOKEN_INDEX); // dev: settlement date invalid asset type
// 3 month tokens and fCash tokens settle at maturity
if (asset.assetType <= Constants.MIN_LIQUIDITY_TOKEN_INDEX) return asset.maturity;
uint256 marketLength = DateTime.getTradedMarket(asset.assetType - 1);
// Liquidity tokens settle at tRef + 90 days. The formula to get a maturity is:
// maturity = tRef + marketLength
// Here we calculate:
// tRef = (maturity - marketLength) + 90 days
return asset.maturity.sub(marketLength).add(Constants.QUARTER);
}
/// @notice Returns the continuously compounded discount rate given an oracle rate and a time to maturity.
/// The formula is: e^(-rate * timeToMaturity).
function getDiscountFactor(uint256 timeToMaturity, uint256 oracleRate)
internal
pure
returns (int256)
{
int128 expValue =
ABDKMath64x64.fromUInt(oracleRate.mul(timeToMaturity).div(Constants.IMPLIED_RATE_TIME));
expValue = ABDKMath64x64.div(expValue, Constants.RATE_PRECISION_64x64);
expValue = ABDKMath64x64.exp(ABDKMath64x64.neg(expValue));
expValue = ABDKMath64x64.mul(expValue, Constants.RATE_PRECISION_64x64);
int256 discountFactor = ABDKMath64x64.toInt(expValue);
return discountFactor;
}
/// @notice Present value of an fCash asset without any risk adjustments.
function getPresentfCashValue(
int256 notional,
uint256 maturity,
uint256 blockTime,
uint256 oracleRate
) internal pure returns (int256) {
if (notional == 0) return 0;
// NOTE: this will revert if maturity < blockTime. That is the correct behavior because we cannot
// discount matured assets.
uint256 timeToMaturity = maturity.sub(blockTime);
int256 discountFactor = getDiscountFactor(timeToMaturity, oracleRate);
require(discountFactor <= Constants.RATE_PRECISION); // dev: get present value invalid discount factor
return notional.mulInRatePrecision(discountFactor);
}
/// @notice Present value of an fCash asset with risk adjustments. Positive fCash value will be discounted more
/// heavily than the oracle rate given and vice versa for negative fCash.
function getRiskAdjustedPresentfCashValue(
CashGroupParameters memory cashGroup,
int256 notional,
uint256 maturity,
uint256 blockTime,
uint256 oracleRate
) internal pure returns (int256) {
if (notional == 0) return 0;
// NOTE: this will revert if maturity < blockTime. That is the correct behavior because we cannot
// discount matured assets.
uint256 timeToMaturity = maturity.sub(blockTime);
int256 discountFactor;
if (notional > 0) {
// If fCash is positive then discounting by a higher rate will result in a smaller
// discount factor (e ^ -x), meaning a lower positive fCash value.
discountFactor = getDiscountFactor(
timeToMaturity,
oracleRate.add(cashGroup.getfCashHaircut())
);
} else {
uint256 debtBuffer = cashGroup.getDebtBuffer();
// If the adjustment exceeds the oracle rate we floor the value of the fCash
// at the notional value. We don't want to require the account to hold more than
// absolutely required.
if (debtBuffer >= oracleRate) return notional;
discountFactor = getDiscountFactor(timeToMaturity, oracleRate - debtBuffer);
}
require(discountFactor <= Constants.RATE_PRECISION); // dev: get risk adjusted pv, invalid discount factor
return notional.mulInRatePrecision(discountFactor);
}
/// @notice Returns the non haircut claims on cash and fCash by the liquidity token.
function getCashClaims(PortfolioAsset memory token, MarketParameters memory market)
internal
pure
returns (int256 assetCash, int256 fCash)
{
require(isLiquidityToken(token.assetType) && token.notional >= 0); // dev: invalid asset, get cash claims
assetCash = market.totalAssetCash.mul(token.notional).div(market.totalLiquidity);
fCash = market.totalfCash.mul(token.notional).div(market.totalLiquidity);
}
/// @notice Returns the haircut claims on cash and fCash
function getHaircutCashClaims(
PortfolioAsset memory token,
MarketParameters memory market,
CashGroupParameters memory cashGroup
) internal pure returns (int256 assetCash, int256 fCash) {
require(isLiquidityToken(token.assetType) && token.notional >= 0); // dev: invalid asset get haircut cash claims
require(token.currencyId == cashGroup.currencyId); // dev: haircut cash claims, currency id mismatch
// This won't overflow, the liquidity token haircut is stored as an uint8
int256 haircut = int256(cashGroup.getLiquidityHaircut(token.assetType));
assetCash =
_calcToken(market.totalAssetCash, token.notional, haircut, market.totalLiquidity);
fCash =
_calcToken(market.totalfCash, token.notional, haircut, market.totalLiquidity);
return (assetCash, fCash);
}
/// @dev This is here to clean up the stack in getHaircutCashClaims
function _calcToken(
int256 numerator,
int256 tokens,
int256 haircut,
int256 liquidity
) private pure returns (int256) {
return numerator.mul(tokens).mul(haircut).div(Constants.PERCENTAGE_DECIMALS).div(liquidity);
}
/// @notice Returns the asset cash claim and the present value of the fCash asset (if it exists)
function getLiquidityTokenValue(
uint256 index,
CashGroupParameters memory cashGroup,
MarketParameters memory market,
PortfolioAsset[] memory assets,
uint256 blockTime,
bool riskAdjusted
) internal view returns (int256, int256) {
PortfolioAsset memory liquidityToken = assets[index];
{
(uint256 marketIndex, bool idiosyncratic) =
DateTime.getMarketIndex(
cashGroup.maxMarketIndex,
liquidityToken.maturity,
blockTime
);
// Liquidity tokens can never be idiosyncratic
require(!idiosyncratic); // dev: idiosyncratic liquidity token
// This market will always be initialized, if a liquidity token exists that means the
// market has some liquidity in it.
cashGroup.loadMarket(market, marketIndex, true, blockTime);
}
int256 assetCashClaim;
int256 fCashClaim;
if (riskAdjusted) {
(assetCashClaim, fCashClaim) = getHaircutCashClaims(liquidityToken, market, cashGroup);
} else {
(assetCashClaim, fCashClaim) = getCashClaims(liquidityToken, market);
}
// Find the matching fCash asset and net off the value, assumes that the portfolio is sorted and
// in that case we know the previous asset will be the matching fCash asset
if (index > 0) {
PortfolioAsset memory maybefCash = assets[index - 1];
if (
maybefCash.assetType == Constants.FCASH_ASSET_TYPE &&
maybefCash.currencyId == liquidityToken.currencyId &&
maybefCash.maturity == liquidityToken.maturity
) {
// Net off the fCashClaim here and we will discount it to present value in the second pass.
// WARNING: this modifies the portfolio in memory and therefore we cannot store this portfolio!
maybefCash.notional = maybefCash.notional.add(fCashClaim);
// This state will prevent the fCash asset from being stored.
maybefCash.storageState = AssetStorageState.RevertIfStored;
return (assetCashClaim, 0);
}
}
// If not matching fCash asset found then get the pv directly
if (riskAdjusted) {
int256 pv =
getRiskAdjustedPresentfCashValue(
cashGroup,
fCashClaim,
liquidityToken.maturity,
blockTime,
market.oracleRate
);
return (assetCashClaim, pv);
} else {
int256 pv =
getPresentfCashValue(fCashClaim, liquidityToken.maturity, blockTime, market.oracleRate);
return (assetCashClaim, pv);
}
}
/// @notice Returns present value of all assets in the cash group as asset cash and the updated
/// portfolio index where the function has ended.
/// @return the value of the cash group in asset cash
function getNetCashGroupValue(
PortfolioAsset[] memory assets,
CashGroupParameters memory cashGroup,
MarketParameters memory market,
uint256 blockTime,
uint256 portfolioIndex
) internal view returns (int256, uint256) {
int256 presentValueAsset;
int256 presentValueUnderlying;
// First calculate value of liquidity tokens because we need to net off fCash value
// before discounting to present value
for (uint256 i = portfolioIndex; i < assets.length; i++) {
if (!isLiquidityToken(assets[i].assetType)) continue;
if (assets[i].currencyId != cashGroup.currencyId) break;
(int256 assetCashClaim, int256 pv) =
getLiquidityTokenValue(
i,
cashGroup,
market,
assets,
blockTime,
true // risk adjusted
);
presentValueAsset = presentValueAsset.add(assetCashClaim);
presentValueUnderlying = presentValueUnderlying.add(pv);
}
uint256 j = portfolioIndex;
for (; j < assets.length; j++) {
PortfolioAsset memory a = assets[j];
if (a.assetType != Constants.FCASH_ASSET_TYPE) continue;
// If we hit a different currency id then we've accounted for all assets in this currency
// j will mark the index where we don't have this currency anymore
if (a.currencyId != cashGroup.currencyId) break;
uint256 oracleRate = cashGroup.calculateOracleRate(a.maturity, blockTime);
int256 pv =
getRiskAdjustedPresentfCashValue(
cashGroup,
a.notional,
a.maturity,
blockTime,
oracleRate
);
presentValueUnderlying = presentValueUnderlying.add(pv);
}
presentValueAsset = presentValueAsset.add(
cashGroup.assetRate.convertFromUnderlying(presentValueUnderlying)
);
return (presentValueAsset, j);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "./Types.sol";
import "./Constants.sol";
import "../../interfaces/notional/IRewarder.sol";
import "../../interfaces/aave/ILendingPool.sol";
library LibStorage {
/// @dev Offset for the initial slot in lib storage, gives us this number of storage slots
/// available in StorageLayoutV1 and all subsequent storage layouts that inherit from it.
uint256 private constant STORAGE_SLOT_BASE = 1000000;
/// @dev Set to MAX_TRADED_MARKET_INDEX * 2, Solidity does not allow assigning constants from imported values
uint256 private constant NUM_NTOKEN_MARKET_FACTORS = 14;
/// @dev Theoretical maximum for MAX_PORTFOLIO_ASSETS, however, we limit this to MAX_TRADED_MARKET_INDEX
/// in practice. It is possible to exceed that value during liquidation up to 14 potential assets.
uint256 private constant MAX_PORTFOLIO_ASSETS = 16;
/// @dev Storage IDs for storage buckets. Each id maps to an internal storage
/// slot used for a particular mapping
/// WARNING: APPEND ONLY
enum StorageId {
Unused,
AccountStorage,
nTokenContext,
nTokenAddress,
nTokenDeposit,
nTokenInitialization,
Balance,
Token,
SettlementRate,
CashGroup,
Market,
AssetsBitmap,
ifCashBitmap,
PortfolioArray,
// WARNING: this nTokenTotalSupply storage object was used for a buggy version
// of the incentives calculation. It should only be used for accounts who have
// not claimed before the migration
nTokenTotalSupply_deprecated,
AssetRate,
ExchangeRate,
nTokenTotalSupply,
SecondaryIncentiveRewarder,
LendingPool
}
/// @dev Mapping from an account address to account context
function getAccountStorage() internal pure
returns (mapping(address => AccountContext) storage store)
{
uint256 slot = _getStorageSlot(StorageId.AccountStorage);
assembly { store.slot := slot }
}
/// @dev Mapping from an nToken address to nTokenContext
function getNTokenContextStorage() internal pure
returns (mapping(address => nTokenContext) storage store)
{
uint256 slot = _getStorageSlot(StorageId.nTokenContext);
assembly { store.slot := slot }
}
/// @dev Mapping from currency id to nTokenAddress
function getNTokenAddressStorage() internal pure
returns (mapping(uint256 => address) storage store)
{
uint256 slot = _getStorageSlot(StorageId.nTokenAddress);
assembly { store.slot := slot }
}
/// @dev Mapping from currency id to uint32 fixed length array of
/// deposit factors. Deposit shares and leverage thresholds are stored striped to
/// reduce the number of storage reads.
function getNTokenDepositStorage() internal pure
returns (mapping(uint256 => uint32[NUM_NTOKEN_MARKET_FACTORS]) storage store)
{
uint256 slot = _getStorageSlot(StorageId.nTokenDeposit);
assembly { store.slot := slot }
}
/// @dev Mapping from currency id to fixed length array of initialization factors,
/// stored striped like deposit shares.
function getNTokenInitStorage() internal pure
returns (mapping(uint256 => uint32[NUM_NTOKEN_MARKET_FACTORS]) storage store)
{
uint256 slot = _getStorageSlot(StorageId.nTokenInitialization);
assembly { store.slot := slot }
}
/// @dev Mapping from account to currencyId to it's balance storage for that currency
function getBalanceStorage() internal pure
returns (mapping(address => mapping(uint256 => BalanceStorage)) storage store)
{
uint256 slot = _getStorageSlot(StorageId.Balance);
assembly { store.slot := slot }
}
/// @dev Mapping from currency id to a boolean for underlying or asset token to
/// the TokenStorage
function getTokenStorage() internal pure
returns (mapping(uint256 => mapping(bool => TokenStorage)) storage store)
{
uint256 slot = _getStorageSlot(StorageId.Token);
assembly { store.slot := slot }
}
/// @dev Mapping from currency id to maturity to its corresponding SettlementRate
function getSettlementRateStorage() internal pure
returns (mapping(uint256 => mapping(uint256 => SettlementRateStorage)) storage store)
{
uint256 slot = _getStorageSlot(StorageId.SettlementRate);
assembly { store.slot := slot }
}
/// @dev Mapping from currency id to maturity to its tightly packed cash group parameters
function getCashGroupStorage() internal pure
returns (mapping(uint256 => bytes32) storage store)
{
uint256 slot = _getStorageSlot(StorageId.CashGroup);
assembly { store.slot := slot }
}
/// @dev Mapping from currency id to maturity to settlement date for a market
function getMarketStorage() internal pure
returns (mapping(uint256 => mapping(uint256 => mapping(uint256 => MarketStorage))) storage store)
{
uint256 slot = _getStorageSlot(StorageId.Market);
assembly { store.slot := slot }
}
/// @dev Mapping from account to currency id to its assets bitmap
function getAssetsBitmapStorage() internal pure
returns (mapping(address => mapping(uint256 => bytes32)) storage store)
{
uint256 slot = _getStorageSlot(StorageId.AssetsBitmap);
assembly { store.slot := slot }
}
/// @dev Mapping from account to currency id to its maturity to its corresponding ifCash balance
function getifCashBitmapStorage() internal pure
returns (mapping(address => mapping(uint256 => mapping(uint256 => ifCashStorage))) storage store)
{
uint256 slot = _getStorageSlot(StorageId.ifCashBitmap);
assembly { store.slot := slot }
}
/// @dev Mapping from account to its fixed length array of portfolio assets
function getPortfolioArrayStorage() internal pure
returns (mapping(address => PortfolioAssetStorage[MAX_PORTFOLIO_ASSETS]) storage store)
{
uint256 slot = _getStorageSlot(StorageId.PortfolioArray);
assembly { store.slot := slot }
}
function getDeprecatedNTokenTotalSupplyStorage() internal pure
returns (mapping(address => nTokenTotalSupplyStorage_deprecated) storage store)
{
uint256 slot = _getStorageSlot(StorageId.nTokenTotalSupply_deprecated);
assembly { store.slot := slot }
}
/// @dev Mapping from nToken address to its total supply values
function getNTokenTotalSupplyStorage() internal pure
returns (mapping(address => nTokenTotalSupplyStorage) storage store)
{
uint256 slot = _getStorageSlot(StorageId.nTokenTotalSupply);
assembly { store.slot := slot }
}
/// @dev Returns the exchange rate between an underlying currency and asset for trading
/// and free collateral. Mapping is from currency id to rate storage object.
function getAssetRateStorage() internal pure
returns (mapping(uint256 => AssetRateStorage) storage store)
{
uint256 slot = _getStorageSlot(StorageId.AssetRate);
assembly { store.slot := slot }
}
/// @dev Returns the exchange rate between an underlying currency and ETH for free
/// collateral purposes. Mapping is from currency id to rate storage object.
function getExchangeRateStorage() internal pure
returns (mapping(uint256 => ETHRateStorage) storage store)
{
uint256 slot = _getStorageSlot(StorageId.ExchangeRate);
assembly { store.slot := slot }
}
/// @dev Returns the address of a secondary incentive rewarder for an nToken if it exists
function getSecondaryIncentiveRewarder() internal pure
returns (mapping(address => IRewarder) storage store)
{
uint256 slot = _getStorageSlot(StorageId.SecondaryIncentiveRewarder);
assembly { store.slot := slot }
}
/// @dev Returns the address of the lending pool
function getLendingPool() internal pure returns (LendingPoolStorage storage store) {
uint256 slot = _getStorageSlot(StorageId.LendingPool);
assembly { store.slot := slot }
}
/// @dev Get the storage slot given a storage ID.
/// @param storageId An entry in `StorageId`
/// @return slot The storage slot.
function _getStorageSlot(StorageId storageId)
private
pure
returns (uint256 slot)
{
// This should never overflow with a reasonable `STORAGE_SLOT_EXP`
// because Solidity will do a range check on `storageId` during the cast.
return uint256(storageId) + STORAGE_SLOT_BASE;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../AccountContextHandler.sol";
import "../markets/CashGroup.sol";
import "../valuation/AssetHandler.sol";
import "../../math/Bitmap.sol";
import "../../math/SafeInt256.sol";
import "../../global/LibStorage.sol";
import "../../global/Constants.sol";
import "../../global/Types.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
library BitmapAssetsHandler {
using SafeMath for uint256;
using SafeInt256 for int256;
using Bitmap for bytes32;
using CashGroup for CashGroupParameters;
using AccountContextHandler for AccountContext;
function getAssetsBitmap(address account, uint256 currencyId) internal view returns (bytes32 assetsBitmap) {
mapping(address => mapping(uint256 => bytes32)) storage store = LibStorage.getAssetsBitmapStorage();
return store[account][currencyId];
}
function setAssetsBitmap(
address account,
uint256 currencyId,
bytes32 assetsBitmap
) internal {
require(assetsBitmap.totalBitsSet() <= Constants.MAX_BITMAP_ASSETS, "Over max assets");
mapping(address => mapping(uint256 => bytes32)) storage store = LibStorage.getAssetsBitmapStorage();
store[account][currencyId] = assetsBitmap;
}
function getifCashNotional(
address account,
uint256 currencyId,
uint256 maturity
) internal view returns (int256 notional) {
mapping(address => mapping(uint256 =>
mapping(uint256 => ifCashStorage))) storage store = LibStorage.getifCashBitmapStorage();
return store[account][currencyId][maturity].notional;
}
/// @notice Adds multiple assets to a bitmap portfolio
function addMultipleifCashAssets(
address account,
AccountContext memory accountContext,
PortfolioAsset[] memory assets
) internal {
require(accountContext.isBitmapEnabled()); // dev: bitmap currency not set
uint256 currencyId = accountContext.bitmapCurrencyId;
for (uint256 i; i < assets.length; i++) {
PortfolioAsset memory asset = assets[i];
if (asset.notional == 0) continue;
require(asset.currencyId == currencyId); // dev: invalid asset in set ifcash assets
require(asset.assetType == Constants.FCASH_ASSET_TYPE); // dev: invalid asset in set ifcash assets
int256 finalNotional;
finalNotional = addifCashAsset(
account,
currencyId,
asset.maturity,
accountContext.nextSettleTime,
asset.notional
);
if (finalNotional < 0)
accountContext.hasDebt = accountContext.hasDebt | Constants.HAS_ASSET_DEBT;
}
}
/// @notice Add an ifCash asset in the bitmap and mapping. Updates the bitmap in memory
/// but not in storage.
/// @return the updated assets bitmap and the final notional amount
function addifCashAsset(
address account,
uint256 currencyId,
uint256 maturity,
uint256 nextSettleTime,
int256 notional
) internal returns (int256) {
bytes32 assetsBitmap = getAssetsBitmap(account, currencyId);
mapping(address => mapping(uint256 =>
mapping(uint256 => ifCashStorage))) storage store = LibStorage.getifCashBitmapStorage();
ifCashStorage storage fCashSlot = store[account][currencyId][maturity];
(uint256 bitNum, bool isExact) = DateTime.getBitNumFromMaturity(nextSettleTime, maturity);
require(isExact); // dev: invalid maturity in set ifcash asset
if (assetsBitmap.isBitSet(bitNum)) {
// Bit is set so we read and update the notional amount
int256 finalNotional = notional.add(fCashSlot.notional);
require(type(int128).min <= finalNotional && finalNotional <= type(int128).max); // dev: bitmap notional overflow
fCashSlot.notional = int128(finalNotional);
// If the new notional is zero then turn off the bit
if (finalNotional == 0) {
assetsBitmap = assetsBitmap.setBit(bitNum, false);
}
setAssetsBitmap(account, currencyId, assetsBitmap);
return finalNotional;
}
if (notional != 0) {
// Bit is not set so we turn it on and update the mapping directly, no read required.
require(type(int128).min <= notional && notional <= type(int128).max); // dev: bitmap notional overflow
fCashSlot.notional = int128(notional);
assetsBitmap = assetsBitmap.setBit(bitNum, true);
setAssetsBitmap(account, currencyId, assetsBitmap);
}
return notional;
}
/// @notice Returns the present value of an asset
function getPresentValue(
address account,
uint256 currencyId,
uint256 maturity,
uint256 blockTime,
CashGroupParameters memory cashGroup,
bool riskAdjusted
) internal view returns (int256) {
int256 notional = getifCashNotional(account, currencyId, maturity);
// In this case the asset has matured and the total value is just the notional amount
if (maturity <= blockTime) {
return notional;
} else {
uint256 oracleRate = cashGroup.calculateOracleRate(maturity, blockTime);
if (riskAdjusted) {
return AssetHandler.getRiskAdjustedPresentfCashValue(
cashGroup,
notional,
maturity,
blockTime,
oracleRate
);
} else {
return AssetHandler.getPresentfCashValue(
notional,
maturity,
blockTime,
oracleRate
);
}
}
}
function getNetPresentValueFromBitmap(
address account,
uint256 currencyId,
uint256 nextSettleTime,
uint256 blockTime,
CashGroupParameters memory cashGroup,
bool riskAdjusted,
bytes32 assetsBitmap
) internal view returns (int256 totalValueUnderlying, bool hasDebt) {
uint256 bitNum = assetsBitmap.getNextBitNum();
while (bitNum != 0) {
uint256 maturity = DateTime.getMaturityFromBitNum(nextSettleTime, bitNum);
int256 pv = getPresentValue(
account,
currencyId,
maturity,
blockTime,
cashGroup,
riskAdjusted
);
totalValueUnderlying = totalValueUnderlying.add(pv);
if (pv < 0) hasDebt = true;
// Turn off the bit and look for the next one
assetsBitmap = assetsBitmap.setBit(bitNum, false);
bitNum = assetsBitmap.getNextBitNum();
}
}
/// @notice Get the net present value of all the ifCash assets
function getifCashNetPresentValue(
address account,
uint256 currencyId,
uint256 nextSettleTime,
uint256 blockTime,
CashGroupParameters memory cashGroup,
bool riskAdjusted
) internal view returns (int256 totalValueUnderlying, bool hasDebt) {
bytes32 assetsBitmap = getAssetsBitmap(account, currencyId);
return getNetPresentValueFromBitmap(
account,
currencyId,
nextSettleTime,
blockTime,
cashGroup,
riskAdjusted,
assetsBitmap
);
}
/// @notice Returns the ifCash assets as an array
function getifCashArray(
address account,
uint256 currencyId,
uint256 nextSettleTime
) internal view returns (PortfolioAsset[] memory) {
bytes32 assetsBitmap = getAssetsBitmap(account, currencyId);
uint256 index = assetsBitmap.totalBitsSet();
PortfolioAsset[] memory assets = new PortfolioAsset[](index);
index = 0;
uint256 bitNum = assetsBitmap.getNextBitNum();
while (bitNum != 0) {
uint256 maturity = DateTime.getMaturityFromBitNum(nextSettleTime, bitNum);
int256 notional = getifCashNotional(account, currencyId, maturity);
PortfolioAsset memory asset = assets[index];
asset.currencyId = currencyId;
asset.maturity = maturity;
asset.assetType = Constants.FCASH_ASSET_TYPE;
asset.notional = notional;
index += 1;
// Turn off the bit and look for the next one
assetsBitmap = assetsBitmap.setBit(bitNum, false);
bitNum = assetsBitmap.getNextBitNum();
}
return assets;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../../interfaces/chainlink/AggregatorV2V3Interface.sol";
import "../../interfaces/notional/AssetRateAdapter.sol";
/// @notice Different types of internal tokens
/// - UnderlyingToken: underlying asset for a cToken (except for Ether)
/// - cToken: Compound interest bearing token
/// - cETH: Special handling for cETH tokens
/// - Ether: the one and only
/// - NonMintable: tokens that do not have an underlying (therefore not cTokens)
/// - aToken: Aave interest bearing tokens
enum TokenType {UnderlyingToken, cToken, cETH, Ether, NonMintable, aToken}
/// @notice Specifies the different trade action types in the system. Each trade action type is
/// encoded in a tightly packed bytes32 object. Trade action type is the first big endian byte of the
/// 32 byte trade action object. The schemas for each trade action type are defined below.
enum TradeActionType {
// (uint8 TradeActionType, uint8 MarketIndex, uint88 fCashAmount, uint32 minImpliedRate, uint120 unused)
Lend,
// (uint8 TradeActionType, uint8 MarketIndex, uint88 fCashAmount, uint32 maxImpliedRate, uint128 unused)
Borrow,
// (uint8 TradeActionType, uint8 MarketIndex, uint88 assetCashAmount, uint32 minImpliedRate, uint32 maxImpliedRate, uint88 unused)
AddLiquidity,
// (uint8 TradeActionType, uint8 MarketIndex, uint88 tokenAmount, uint32 minImpliedRate, uint32 maxImpliedRate, uint88 unused)
RemoveLiquidity,
// (uint8 TradeActionType, uint32 Maturity, int88 fCashResidualAmount, uint128 unused)
PurchaseNTokenResidual,
// (uint8 TradeActionType, address CounterpartyAddress, int88 fCashAmountToSettle)
SettleCashDebt
}
/// @notice Specifies different deposit actions that can occur during BalanceAction or BalanceActionWithTrades
enum DepositActionType {
// No deposit action
None,
// Deposit asset cash, depositActionAmount is specified in asset cash external precision
DepositAsset,
// Deposit underlying tokens that are mintable to asset cash, depositActionAmount is specified in underlying token
// external precision
DepositUnderlying,
// Deposits specified asset cash external precision amount into an nToken and mints the corresponding amount of
// nTokens into the account
DepositAssetAndMintNToken,
// Deposits specified underlying in external precision, mints asset cash, and uses that asset cash to mint nTokens
DepositUnderlyingAndMintNToken,
// Redeems an nToken balance to asset cash. depositActionAmount is specified in nToken precision. Considered a deposit action
// because it deposits asset cash into an account. If there are fCash residuals that cannot be sold off, will revert.
RedeemNToken,
// Converts specified amount of asset cash balance already in Notional to nTokens. depositActionAmount is specified in
// Notional internal 8 decimal precision.
ConvertCashToNToken
}
/// @notice Used internally for PortfolioHandler state
enum AssetStorageState {NoChange, Update, Delete, RevertIfStored}
/****** Calldata objects ******/
/// @notice Defines a balance action for batchAction
struct BalanceAction {
// Deposit action to take (if any)
DepositActionType actionType;
uint16 currencyId;
// Deposit action amount must correspond to the depositActionType, see documentation above.
uint256 depositActionAmount;
// Withdraw an amount of asset cash specified in Notional internal 8 decimal precision
uint256 withdrawAmountInternalPrecision;
// If set to true, will withdraw entire cash balance. Useful if there may be an unknown amount of asset cash
// residual left from trading.
bool withdrawEntireCashBalance;
// If set to true, will redeem asset cash to the underlying token on withdraw.
bool redeemToUnderlying;
}
/// @notice Defines a balance action with a set of trades to do as well
struct BalanceActionWithTrades {
DepositActionType actionType;
uint16 currencyId;
uint256 depositActionAmount;
uint256 withdrawAmountInternalPrecision;
bool withdrawEntireCashBalance;
bool redeemToUnderlying;
// Array of tightly packed 32 byte objects that represent trades. See TradeActionType documentation
bytes32[] trades;
}
/****** In memory objects ******/
/// @notice Internal object that represents settled cash balances
struct SettleAmount {
uint256 currencyId;
int256 netCashChange;
}
/// @notice Internal object that represents a token
struct Token {
address tokenAddress;
bool hasTransferFee;
int256 decimals;
TokenType tokenType;
uint256 maxCollateralBalance;
}
/// @notice Internal object that represents an nToken portfolio
struct nTokenPortfolio {
CashGroupParameters cashGroup;
PortfolioState portfolioState;
int256 totalSupply;
int256 cashBalance;
uint256 lastInitializedTime;
bytes6 parameters;
address tokenAddress;
}
/// @notice Internal object used during liquidation
struct LiquidationFactors {
address account;
// Aggregate free collateral of the account denominated in ETH underlying, 8 decimal precision
int256 netETHValue;
// Amount of net local currency asset cash before haircuts and buffers available
int256 localAssetAvailable;
// Amount of net collateral currency asset cash before haircuts and buffers available
int256 collateralAssetAvailable;
// Haircut value of nToken holdings denominated in asset cash, will be local or collateral nTokens based
// on liquidation type
int256 nTokenHaircutAssetValue;
// nToken parameters for calculating liquidation amount
bytes6 nTokenParameters;
// ETH exchange rate from local currency to ETH
ETHRate localETHRate;
// ETH exchange rate from collateral currency to ETH
ETHRate collateralETHRate;
// Asset rate for the local currency, used in cross currency calculations to calculate local asset cash required
AssetRateParameters localAssetRate;
// Used during currency liquidations if the account has liquidity tokens
CashGroupParameters collateralCashGroup;
// Used during currency liquidations if it is only a calculation, defaults to false
bool isCalculation;
}
/// @notice Internal asset array portfolio state
struct PortfolioState {
// Array of currently stored assets
PortfolioAsset[] storedAssets;
// Array of new assets to add
PortfolioAsset[] newAssets;
uint256 lastNewAssetIndex;
// Holds the length of stored assets after accounting for deleted assets
uint256 storedAssetLength;
}
/// @notice In memory ETH exchange rate used during free collateral calculation.
struct ETHRate {
// The decimals (i.e. 10^rateDecimalPlaces) of the exchange rate, defined by the rate oracle
int256 rateDecimals;
// The exchange rate from base to ETH (if rate invert is required it is already done)
int256 rate;
// Amount of buffer as a multiple with a basis of 100 applied to negative balances.
int256 buffer;
// Amount of haircut as a multiple with a basis of 100 applied to positive balances
int256 haircut;
// Liquidation discount as a multiple with a basis of 100 applied to the exchange rate
// as an incentive given to liquidators.
int256 liquidationDiscount;
}
/// @notice Internal object used to handle balance state during a transaction
struct BalanceState {
uint16 currencyId;
// Cash balance stored in balance state at the beginning of the transaction
int256 storedCashBalance;
// nToken balance stored at the beginning of the transaction
int256 storedNTokenBalance;
// The net cash change as a result of asset settlement or trading
int256 netCashChange;
// Net asset transfers into or out of the account
int256 netAssetTransferInternalPrecision;
// Net token transfers into or out of the account
int256 netNTokenTransfer;
// Net token supply change from minting or redeeming
int256 netNTokenSupplyChange;
// The last time incentives were claimed for this currency
uint256 lastClaimTime;
// Accumulator for incentives that the account no longer has a claim over
uint256 accountIncentiveDebt;
}
/// @dev Asset rate used to convert between underlying cash and asset cash
struct AssetRateParameters {
// Address of the asset rate oracle
AssetRateAdapter rateOracle;
// The exchange rate from base to quote (if invert is required it is already done)
int256 rate;
// The decimals of the underlying, the rate converts to the underlying decimals
int256 underlyingDecimals;
}
/// @dev Cash group when loaded into memory
struct CashGroupParameters {
uint16 currencyId;
uint256 maxMarketIndex;
AssetRateParameters assetRate;
bytes32 data;
}
/// @dev A portfolio asset when loaded in memory
struct PortfolioAsset {
// Asset currency id
uint256 currencyId;
uint256 maturity;
// Asset type, fCash or liquidity token.
uint256 assetType;
// fCash amount or liquidity token amount
int256 notional;
// Used for managing portfolio asset state
uint256 storageSlot;
// The state of the asset for when it is written to storage
AssetStorageState storageState;
}
/// @dev Market object as represented in memory
struct MarketParameters {
bytes32 storageSlot;
uint256 maturity;
// Total amount of fCash available for purchase in the market.
int256 totalfCash;
// Total amount of cash available for purchase in the market.
int256 totalAssetCash;
// Total amount of liquidity tokens (representing a claim on liquidity) in the market.
int256 totalLiquidity;
// This is the previous annualized interest rate in RATE_PRECISION that the market traded
// at. This is used to calculate the rate anchor to smooth interest rates over time.
uint256 lastImpliedRate;
// Time lagged version of lastImpliedRate, used to value fCash assets at market rates while
// remaining resistent to flash loan attacks.
uint256 oracleRate;
// This is the timestamp of the previous trade
uint256 previousTradeTime;
}
/****** Storage objects ******/
/// @dev Token object in storage:
/// 20 bytes for token address
/// 1 byte for hasTransferFee
/// 1 byte for tokenType
/// 1 byte for tokenDecimals
/// 9 bytes for maxCollateralBalance (may not always be set)
struct TokenStorage {
// Address of the token
address tokenAddress;
// Transfer fees will change token deposit behavior
bool hasTransferFee;
TokenType tokenType;
uint8 decimalPlaces;
// Upper limit on how much of this token the contract can hold at any time
uint72 maxCollateralBalance;
}
/// @dev Exchange rate object as it is represented in storage, total storage is 25 bytes.
struct ETHRateStorage {
// Address of the rate oracle
AggregatorV2V3Interface rateOracle;
// The decimal places of precision that the rate oracle uses
uint8 rateDecimalPlaces;
// True of the exchange rate must be inverted
bool mustInvert;
// NOTE: both of these governance values are set with BUFFER_DECIMALS precision
// Amount of buffer to apply to the exchange rate for negative balances.
uint8 buffer;
// Amount of haircut to apply to the exchange rate for positive balances
uint8 haircut;
// Liquidation discount in percentage point terms, 106 means a 6% discount
uint8 liquidationDiscount;
}
/// @dev Asset rate oracle object as it is represented in storage, total storage is 21 bytes.
struct AssetRateStorage {
// Address of the rate oracle
AssetRateAdapter rateOracle;
// The decimal places of the underlying asset
uint8 underlyingDecimalPlaces;
}
/// @dev Governance parameters for a cash group, total storage is 9 bytes + 7 bytes for liquidity token haircuts
/// and 7 bytes for rate scalars, total of 23 bytes. Note that this is stored packed in the storage slot so there
/// are no indexes stored for liquidityTokenHaircuts or rateScalars, maxMarketIndex is used instead to determine the
/// length.
struct CashGroupSettings {
// Index of the AMMs on chain that will be made available. Idiosyncratic fCash
// that is dated less than the longest AMM will be tradable.
uint8 maxMarketIndex;
// Time window in 5 minute increments that the rate oracle will be averaged over
uint8 rateOracleTimeWindow5Min;
// Total fees per trade, specified in BPS
uint8 totalFeeBPS;
// Share of the fees given to the protocol, denominated in percentage
uint8 reserveFeeShare;
// Debt buffer specified in 5 BPS increments
uint8 debtBuffer5BPS;
// fCash haircut specified in 5 BPS increments
uint8 fCashHaircut5BPS;
// If an account has a negative cash balance, it can be settled by incurring debt at the 3 month market. This
// is the basis points for the penalty rate that will be added the current 3 month oracle rate.
uint8 settlementPenaltyRate5BPS;
// If an account has fCash that is being liquidated, this is the discount that the liquidator can purchase it for
uint8 liquidationfCashHaircut5BPS;
// If an account has fCash that is being liquidated, this is the discount that the liquidator can purchase it for
uint8 liquidationDebtBuffer5BPS;
// Liquidity token haircut applied to cash claims, specified as a percentage between 0 and 100
uint8[] liquidityTokenHaircuts;
// Rate scalar used to determine the slippage of the market
uint8[] rateScalars;
}
/// @dev Holds account level context information used to determine settlement and
/// free collateral actions. Total storage is 28 bytes
struct AccountContext {
// Used to check when settlement must be triggered on an account
uint40 nextSettleTime;
// For lenders that never incur debt, we use this flag to skip the free collateral check.
bytes1 hasDebt;
// Length of the account's asset array
uint8 assetArrayLength;
// If this account has bitmaps set, this is the corresponding currency id
uint16 bitmapCurrencyId;
// 9 total active currencies possible (2 bytes each)
bytes18 activeCurrencies;
}
/// @dev Holds nToken context information mapped via the nToken address, total storage is
/// 16 bytes
struct nTokenContext {
// Currency id that the nToken represents
uint16 currencyId;
// Annual incentive emission rate denominated in WHOLE TOKENS (multiply by
// INTERNAL_TOKEN_PRECISION to get the actual rate)
uint32 incentiveAnnualEmissionRate;
// The last block time at utc0 that the nToken was initialized at, zero if it
// has never been initialized
uint32 lastInitializedTime;
// Length of the asset array, refers to the number of liquidity tokens an nToken
// currently holds
uint8 assetArrayLength;
// Each byte is a specific nToken parameter
bytes5 nTokenParameters;
// Reserved bytes for future usage
bytes15 _unused;
// Set to true if a secondary rewarder is set
bool hasSecondaryRewarder;
}
/// @dev Holds account balance information, total storage 32 bytes
struct BalanceStorage {
// Number of nTokens held by the account
uint80 nTokenBalance;
// Last time the account claimed their nTokens
uint32 lastClaimTime;
// Incentives that the account no longer has a claim over
uint56 accountIncentiveDebt;
// Cash balance of the account
int88 cashBalance;
}
/// @dev Holds information about a settlement rate, total storage 25 bytes
struct SettlementRateStorage {
uint40 blockTime;
uint128 settlementRate;
uint8 underlyingDecimalPlaces;
}
/// @dev Holds information about a market, total storage is 42 bytes so this spans
/// two storage words
struct MarketStorage {
// Total fCash in the market
uint80 totalfCash;
// Total asset cash in the market
uint80 totalAssetCash;
// Last annualized interest rate the market traded at
uint32 lastImpliedRate;
// Last recorded oracle rate for the market
uint32 oracleRate;
// Last time a trade was made
uint32 previousTradeTime;
// This is stored in slot + 1
uint80 totalLiquidity;
}
struct ifCashStorage {
// Notional amount of fCash at the slot, limited to int128 to allow for
// future expansion
int128 notional;
}
/// @dev A single portfolio asset in storage, total storage of 19 bytes
struct PortfolioAssetStorage {
// Currency Id for the asset
uint16 currencyId;
// Maturity of the asset
uint40 maturity;
// Asset type (fCash or Liquidity Token marker)
uint8 assetType;
// Notional
int88 notional;
}
/// @dev nToken total supply factors for the nToken, includes factors related
/// to claiming incentives, total storage 32 bytes. This is the deprecated version
struct nTokenTotalSupplyStorage_deprecated {
// Total supply of the nToken
uint96 totalSupply;
// Integral of the total supply used for calculating the average total supply
uint128 integralTotalSupply;
// Last timestamp the supply value changed, used for calculating the integralTotalSupply
uint32 lastSupplyChangeTime;
}
/// @dev nToken total supply factors for the nToken, includes factors related
/// to claiming incentives, total storage 32 bytes.
struct nTokenTotalSupplyStorage {
// Total supply of the nToken
uint96 totalSupply;
// How many NOTE incentives should be issued per nToken in 1e18 precision
uint128 accumulatedNOTEPerNToken;
// Last timestamp when the accumulation happened
uint32 lastAccumulatedTime;
}
/// @dev Used in view methods to return account balances in a developer friendly manner
struct AccountBalance {
uint16 currencyId;
int256 cashBalance;
int256 nTokenBalance;
uint256 lastClaimTime;
uint256 accountIncentiveDebt;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
/// @title All shared constants for the Notional system should be declared here.
library Constants {
uint8 internal constant CETH_DECIMAL_PLACES = 8;
// Token precision used for all internal balances, TokenHandler library ensures that we
// limit the dust amount caused by precision mismatches
int256 internal constant INTERNAL_TOKEN_PRECISION = 1e8;
uint256 internal constant INCENTIVE_ACCUMULATION_PRECISION = 1e18;
// ETH will be initialized as the first currency
uint256 internal constant ETH_CURRENCY_ID = 1;
uint8 internal constant ETH_DECIMAL_PLACES = 18;
int256 internal constant ETH_DECIMALS = 1e18;
// Used to prevent overflow when converting decimal places to decimal precision values via
// 10**decimalPlaces. This is a safe value for int256 and uint256 variables. We apply this
// constraint when storing decimal places in governance.
uint256 internal constant MAX_DECIMAL_PLACES = 36;
// Address of the reserve account
address internal constant RESERVE = address(0);
// Most significant bit
bytes32 internal constant MSB =
0x8000000000000000000000000000000000000000000000000000000000000000;
// Each bit set in this mask marks where an active market should be in the bitmap
// if the first bit refers to the reference time. Used to detect idiosyncratic
// fcash in the nToken accounts
bytes32 internal constant ACTIVE_MARKETS_MASK = (
MSB >> ( 90 - 1) | // 3 month
MSB >> (105 - 1) | // 6 month
MSB >> (135 - 1) | // 1 year
MSB >> (147 - 1) | // 2 year
MSB >> (183 - 1) | // 5 year
MSB >> (211 - 1) | // 10 year
MSB >> (251 - 1) // 20 year
);
// Basis for percentages
int256 internal constant PERCENTAGE_DECIMALS = 100;
// Max number of traded markets, also used as the maximum number of assets in a portfolio array
uint256 internal constant MAX_TRADED_MARKET_INDEX = 7;
// Max number of fCash assets in a bitmap, this is based on the gas costs of calculating free collateral
// for a bitmap portfolio
uint256 internal constant MAX_BITMAP_ASSETS = 20;
uint256 internal constant FIVE_MINUTES = 300;
// Internal date representations, note we use a 6/30/360 week/month/year convention here
uint256 internal constant DAY = 86400;
// We use six day weeks to ensure that all time references divide evenly
uint256 internal constant WEEK = DAY * 6;
uint256 internal constant MONTH = WEEK * 5;
uint256 internal constant QUARTER = MONTH * 3;
uint256 internal constant YEAR = QUARTER * 4;
// These constants are used in DateTime.sol
uint256 internal constant DAYS_IN_WEEK = 6;
uint256 internal constant DAYS_IN_MONTH = 30;
uint256 internal constant DAYS_IN_QUARTER = 90;
// Offsets for each time chunk denominated in days
uint256 internal constant MAX_DAY_OFFSET = 90;
uint256 internal constant MAX_WEEK_OFFSET = 360;
uint256 internal constant MAX_MONTH_OFFSET = 2160;
uint256 internal constant MAX_QUARTER_OFFSET = 7650;
// Offsets for each time chunk denominated in bits
uint256 internal constant WEEK_BIT_OFFSET = 90;
uint256 internal constant MONTH_BIT_OFFSET = 135;
uint256 internal constant QUARTER_BIT_OFFSET = 195;
// This is a constant that represents the time period that all rates are normalized by, 360 days
uint256 internal constant IMPLIED_RATE_TIME = 360 * DAY;
// Number of decimal places that rates are stored in, equals 100%
int256 internal constant RATE_PRECISION = 1e9;
// One basis point in RATE_PRECISION terms
uint256 internal constant BASIS_POINT = uint256(RATE_PRECISION / 10000);
// Used to when calculating the amount to deleverage of a market when minting nTokens
uint256 internal constant DELEVERAGE_BUFFER = 300 * BASIS_POINT;
// Used for scaling cash group factors
uint256 internal constant FIVE_BASIS_POINTS = 5 * BASIS_POINT;
// Used for residual purchase incentive and cash withholding buffer
uint256 internal constant TEN_BASIS_POINTS = 10 * BASIS_POINT;
// This is the ABDK64x64 representation of RATE_PRECISION
// RATE_PRECISION_64x64 = ABDKMath64x64.fromUint(RATE_PRECISION)
int128 internal constant RATE_PRECISION_64x64 = 0x3b9aca000000000000000000;
int128 internal constant LOG_RATE_PRECISION_64x64 = 382276781265598821176;
// Limit the market proportion so that borrowing cannot hit extremely high interest rates
int256 internal constant MAX_MARKET_PROPORTION = RATE_PRECISION * 99 / 100;
uint8 internal constant FCASH_ASSET_TYPE = 1;
// Liquidity token asset types are 1 + marketIndex (where marketIndex is 1-indexed)
uint8 internal constant MIN_LIQUIDITY_TOKEN_INDEX = 2;
uint8 internal constant MAX_LIQUIDITY_TOKEN_INDEX = 8;
// Used for converting bool to bytes1, solidity does not have a native conversion
// method for this
bytes1 internal constant BOOL_FALSE = 0x00;
bytes1 internal constant BOOL_TRUE = 0x01;
// Account context flags
bytes1 internal constant HAS_ASSET_DEBT = 0x01;
bytes1 internal constant HAS_CASH_DEBT = 0x02;
bytes2 internal constant ACTIVE_IN_PORTFOLIO = 0x8000;
bytes2 internal constant ACTIVE_IN_BALANCES = 0x4000;
bytes2 internal constant UNMASK_FLAGS = 0x3FFF;
uint16 internal constant MAX_CURRENCIES = uint16(UNMASK_FLAGS);
// Equal to 100% of all deposit amounts for nToken liquidity across fCash markets.
int256 internal constant DEPOSIT_PERCENT_BASIS = 1e8;
// nToken Parameters: there are offsets in the nTokenParameters bytes6 variable returned
// in nTokenHandler. Each constant represents a position in the byte array.
uint8 internal constant LIQUIDATION_HAIRCUT_PERCENTAGE = 0;
uint8 internal constant CASH_WITHHOLDING_BUFFER = 1;
uint8 internal constant RESIDUAL_PURCHASE_TIME_BUFFER = 2;
uint8 internal constant PV_HAIRCUT_PERCENTAGE = 3;
uint8 internal constant RESIDUAL_PURCHASE_INCENTIVE = 4;
// Liquidation parameters
// Default percentage of collateral that a liquidator is allowed to liquidate, will be higher if the account
// requires more collateral to be liquidated
int256 internal constant DEFAULT_LIQUIDATION_PORTION = 40;
// Percentage of local liquidity token cash claim delivered to the liquidator for liquidating liquidity tokens
int256 internal constant TOKEN_REPO_INCENTIVE_PERCENT = 30;
// Pause Router liquidation enabled states
bytes1 internal constant LOCAL_CURRENCY_ENABLED = 0x01;
bytes1 internal constant COLLATERAL_CURRENCY_ENABLED = 0x02;
bytes1 internal constant LOCAL_FCASH_ENABLED = 0x04;
bytes1 internal constant CROSS_CURRENCY_FCASH_ENABLED = 0x08;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../../global/Constants.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
library DateTime {
using SafeMath for uint256;
/// @notice Returns the current reference time which is how all the AMM dates are calculated.
function getReferenceTime(uint256 blockTime) internal pure returns (uint256) {
require(blockTime >= Constants.QUARTER);
return blockTime - (blockTime % Constants.QUARTER);
}
/// @notice Truncates a date to midnight UTC time
function getTimeUTC0(uint256 time) internal pure returns (uint256) {
require(time >= Constants.DAY);
return time - (time % Constants.DAY);
}
/// @notice These are the predetermined market offsets for trading
/// @dev Markets are 1-indexed because the 0 index means that no markets are listed for the cash group.
function getTradedMarket(uint256 index) internal pure returns (uint256) {
if (index == 1) return Constants.QUARTER;
if (index == 2) return 2 * Constants.QUARTER;
if (index == 3) return Constants.YEAR;
if (index == 4) return 2 * Constants.YEAR;
if (index == 5) return 5 * Constants.YEAR;
if (index == 6) return 10 * Constants.YEAR;
if (index == 7) return 20 * Constants.YEAR;
revert("Invalid index");
}
/// @notice Determines if the maturity falls on one of the valid on chain market dates.
function isValidMarketMaturity(
uint256 maxMarketIndex,
uint256 maturity,
uint256 blockTime
) internal pure returns (bool) {
require(maxMarketIndex > 0, "CG: no markets listed");
require(maxMarketIndex <= Constants.MAX_TRADED_MARKET_INDEX, "CG: market index bound");
if (maturity % Constants.QUARTER != 0) return false;
uint256 tRef = DateTime.getReferenceTime(blockTime);
for (uint256 i = 1; i <= maxMarketIndex; i++) {
if (maturity == tRef.add(DateTime.getTradedMarket(i))) return true;
}
return false;
}
/// @notice Determines if an idiosyncratic maturity is valid and returns the bit reference that is the case.
function isValidMaturity(
uint256 maxMarketIndex,
uint256 maturity,
uint256 blockTime
) internal pure returns (bool) {
uint256 tRef = DateTime.getReferenceTime(blockTime);
uint256 maxMaturity = tRef.add(DateTime.getTradedMarket(maxMarketIndex));
// Cannot trade past max maturity
if (maturity > maxMaturity) return false;
// prettier-ignore
(/* */, bool isValid) = DateTime.getBitNumFromMaturity(blockTime, maturity);
return isValid;
}
/// @notice Returns the market index for a given maturity, if the maturity is idiosyncratic
/// will return the nearest market index that is larger than the maturity.
/// @return uint marketIndex, bool isIdiosyncratic
function getMarketIndex(
uint256 maxMarketIndex,
uint256 maturity,
uint256 blockTime
) internal pure returns (uint256, bool) {
require(maxMarketIndex > 0, "CG: no markets listed");
require(maxMarketIndex <= Constants.MAX_TRADED_MARKET_INDEX, "CG: market index bound");
uint256 tRef = DateTime.getReferenceTime(blockTime);
for (uint256 i = 1; i <= maxMarketIndex; i++) {
uint256 marketMaturity = tRef.add(DateTime.getTradedMarket(i));
// If market matches then is not idiosyncratic
if (marketMaturity == maturity) return (i, false);
// Returns the market that is immediately greater than the maturity
if (marketMaturity > maturity) return (i, true);
}
revert("CG: no market found");
}
/// @notice Given a bit number and the reference time of the first bit, returns the bit number
/// of a given maturity.
/// @return bitNum and a true or false if the maturity falls on the exact bit
function getBitNumFromMaturity(uint256 blockTime, uint256 maturity)
internal
pure
returns (uint256, bool)
{
uint256 blockTimeUTC0 = getTimeUTC0(blockTime);
// Maturities must always divide days evenly
if (maturity % Constants.DAY != 0) return (0, false);
// Maturity cannot be in the past
if (blockTimeUTC0 >= maturity) return (0, false);
// Overflow check done above
// daysOffset has no remainders, checked above
uint256 daysOffset = (maturity - blockTimeUTC0) / Constants.DAY;
// These if statements need to fall through to the next one
if (daysOffset <= Constants.MAX_DAY_OFFSET) {
return (daysOffset, true);
} else if (daysOffset <= Constants.MAX_WEEK_OFFSET) {
// (daysOffset - MAX_DAY_OFFSET) is the days overflow into the week portion, must be > 0
// (blockTimeUTC0 % WEEK) / DAY is the offset into the week portion
// This returns the offset from the previous max offset in days
uint256 offsetInDays =
daysOffset -
Constants.MAX_DAY_OFFSET +
(blockTimeUTC0 % Constants.WEEK) /
Constants.DAY;
return (
// This converts the offset in days to its corresponding bit position, truncating down
// if it does not divide evenly into DAYS_IN_WEEK
Constants.WEEK_BIT_OFFSET + offsetInDays / Constants.DAYS_IN_WEEK,
(offsetInDays % Constants.DAYS_IN_WEEK) == 0
);
} else if (daysOffset <= Constants.MAX_MONTH_OFFSET) {
uint256 offsetInDays =
daysOffset -
Constants.MAX_WEEK_OFFSET +
(blockTimeUTC0 % Constants.MONTH) /
Constants.DAY;
return (
Constants.MONTH_BIT_OFFSET + offsetInDays / Constants.DAYS_IN_MONTH,
(offsetInDays % Constants.DAYS_IN_MONTH) == 0
);
} else if (daysOffset <= Constants.MAX_QUARTER_OFFSET) {
uint256 offsetInDays =
daysOffset -
Constants.MAX_MONTH_OFFSET +
(blockTimeUTC0 % Constants.QUARTER) /
Constants.DAY;
return (
Constants.QUARTER_BIT_OFFSET + offsetInDays / Constants.DAYS_IN_QUARTER,
(offsetInDays % Constants.DAYS_IN_QUARTER) == 0
);
}
// This is the maximum 1-indexed bit num, it is never valid because it is beyond the 20
// year max maturity
return (256, false);
}
/// @notice Given a bit number and a block time returns the maturity that the bit number
/// should reference. Bit numbers are one indexed.
function getMaturityFromBitNum(uint256 blockTime, uint256 bitNum)
internal
pure
returns (uint256)
{
require(bitNum != 0); // dev: cash group get maturity from bit num is zero
require(bitNum <= 256); // dev: cash group get maturity from bit num overflow
uint256 blockTimeUTC0 = getTimeUTC0(blockTime);
uint256 firstBit;
if (bitNum <= Constants.WEEK_BIT_OFFSET) {
return blockTimeUTC0 + bitNum * Constants.DAY;
} else if (bitNum <= Constants.MONTH_BIT_OFFSET) {
firstBit =
blockTimeUTC0 +
Constants.MAX_DAY_OFFSET * Constants.DAY -
// This backs up to the day that is divisible by a week
(blockTimeUTC0 % Constants.WEEK);
return firstBit + (bitNum - Constants.WEEK_BIT_OFFSET) * Constants.WEEK;
} else if (bitNum <= Constants.QUARTER_BIT_OFFSET) {
firstBit =
blockTimeUTC0 +
Constants.MAX_WEEK_OFFSET * Constants.DAY -
(blockTimeUTC0 % Constants.MONTH);
return firstBit + (bitNum - Constants.MONTH_BIT_OFFSET) * Constants.MONTH;
} else {
firstBit =
blockTimeUTC0 +
Constants.MAX_MONTH_OFFSET * Constants.DAY -
(blockTimeUTC0 % Constants.QUARTER);
return firstBit + (bitNum - Constants.QUARTER_BIT_OFFSET) * Constants.QUARTER;
}
}
}
// SPDX-License-Identifier: BSD-4-Clause
/*
* ABDK Math 64.64 Smart Contract Library. Copyright © 2019 by ABDK Consulting.
* Author: Mikhail Vladimirov <[email protected]>
*/
pragma solidity ^0.5.0 || ^0.6.0 || ^0.7.0;
/**
* Smart contract library of mathematical functions operating with signed
* 64.64-bit fixed point numbers. Signed 64.64-bit fixed point number is
* basically a simple fraction whose numerator is signed 128-bit integer and
* denominator is 2^64. As long as denominator is always the same, there is no
* need to store it, thus in Solidity signed 64.64-bit fixed point numbers are
* represented by int128 type holding only the numerator.
*/
library ABDKMath64x64 {
/*
* Minimum value signed 64.64-bit fixed point number may have.
*/
int128 private constant MIN_64x64 = -0x80000000000000000000000000000000;
/*
* Maximum value signed 64.64-bit fixed point number may have.
*/
int128 private constant MAX_64x64 = 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF;
/**
* Convert signed 256-bit integer number into signed 64.64-bit fixed point
* number. Revert on overflow.
*
* @param x signed 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function fromInt (int256 x) internal pure returns (int128) {
require (x >= -0x8000000000000000 && x <= 0x7FFFFFFFFFFFFFFF);
return int128 (x << 64);
}
/**
* Convert signed 64.64 fixed point number into signed 64-bit integer number
* rounding down.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64-bit integer number
*/
function toInt (int128 x) internal pure returns (int64) {
return int64 (x >> 64);
}
/**
* Convert unsigned 256-bit integer number into signed 64.64-bit fixed point
* number. Revert on overflow.
*
* @param x unsigned 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function fromUInt (uint256 x) internal pure returns (int128) {
require (x <= 0x7FFFFFFFFFFFFFFF);
return int128 (x << 64);
}
/**
* Convert signed 64.64 fixed point number into unsigned 64-bit integer
* number rounding down. Revert on underflow.
*
* @param x signed 64.64-bit fixed point number
* @return unsigned 64-bit integer number
*/
function toUInt (int128 x) internal pure returns (uint64) {
require (x >= 0);
return uint64 (x >> 64);
}
/**
* Convert signed 128.128 fixed point number into signed 64.64-bit fixed point
* number rounding down. Revert on overflow.
*
* @param x signed 128.128-bin fixed point number
* @return signed 64.64-bit fixed point number
*/
function from128x128 (int256 x) internal pure returns (int128) {
int256 result = x >> 64;
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
/**
* Convert signed 64.64 fixed point number into signed 128.128 fixed point
* number.
*
* @param x signed 64.64-bit fixed point number
* @return signed 128.128 fixed point number
*/
function to128x128 (int128 x) internal pure returns (int256) {
return int256 (x) << 64;
}
/**
* Calculate x + y. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function add (int128 x, int128 y) internal pure returns (int128) {
int256 result = int256(x) + y;
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
/**
* Calculate x - y. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function sub (int128 x, int128 y) internal pure returns (int128) {
int256 result = int256(x) - y;
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
/**
* Calculate x * y rounding down. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function mul (int128 x, int128 y) internal pure returns (int128) {
int256 result = int256(x) * y >> 64;
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
/**
* Calculate x * y rounding towards zero, where x is signed 64.64 fixed point
* number and y is signed 256-bit integer number. Revert on overflow.
*
* @param x signed 64.64 fixed point number
* @param y signed 256-bit integer number
* @return signed 256-bit integer number
*/
function muli (int128 x, int256 y) internal pure returns (int256) {
if (x == MIN_64x64) {
require (y >= -0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF &&
y <= 0x1000000000000000000000000000000000000000000000000);
return -y << 63;
} else {
bool negativeResult = false;
if (x < 0) {
x = -x;
negativeResult = true;
}
if (y < 0) {
y = -y; // We rely on overflow behavior here
negativeResult = !negativeResult;
}
uint256 absoluteResult = mulu (x, uint256 (y));
if (negativeResult) {
require (absoluteResult <=
0x8000000000000000000000000000000000000000000000000000000000000000);
return -int256 (absoluteResult); // We rely on overflow behavior here
} else {
require (absoluteResult <=
0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
return int256 (absoluteResult);
}
}
}
/**
* Calculate x * y rounding down, where x is signed 64.64 fixed point number
* and y is unsigned 256-bit integer number. Revert on overflow.
*
* @param x signed 64.64 fixed point number
* @param y unsigned 256-bit integer number
* @return unsigned 256-bit integer number
*/
function mulu (int128 x, uint256 y) internal pure returns (uint256) {
if (y == 0) return 0;
require (x >= 0);
uint256 lo = (uint256 (x) * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)) >> 64;
uint256 hi = uint256 (x) * (y >> 128);
require (hi <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
hi <<= 64;
require (hi <=
0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF - lo);
return hi + lo;
}
/**
* Calculate x / y rounding towards zero. Revert on overflow or when y is
* zero.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function div (int128 x, int128 y) internal pure returns (int128) {
require (y != 0);
int256 result = (int256 (x) << 64) / y;
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
/**
* Calculate x / y rounding towards zero, where x and y are signed 256-bit
* integer numbers. Revert on overflow or when y is zero.
*
* @param x signed 256-bit integer number
* @param y signed 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function divi (int256 x, int256 y) internal pure returns (int128) {
require (y != 0);
bool negativeResult = false;
if (x < 0) {
x = -x; // We rely on overflow behavior here
negativeResult = true;
}
if (y < 0) {
y = -y; // We rely on overflow behavior here
negativeResult = !negativeResult;
}
uint128 absoluteResult = divuu (uint256 (x), uint256 (y));
if (negativeResult) {
require (absoluteResult <= 0x80000000000000000000000000000000);
return -int128 (absoluteResult); // We rely on overflow behavior here
} else {
require (absoluteResult <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
return int128 (absoluteResult); // We rely on overflow behavior here
}
}
/**
* Calculate x / y rounding towards zero, where x and y are unsigned 256-bit
* integer numbers. Revert on overflow or when y is zero.
*
* @param x unsigned 256-bit integer number
* @param y unsigned 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function divu (uint256 x, uint256 y) internal pure returns (int128) {
require (y != 0);
uint128 result = divuu (x, y);
require (result <= uint128 (MAX_64x64));
return int128 (result);
}
/**
* Calculate -x. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function neg (int128 x) internal pure returns (int128) {
require (x != MIN_64x64);
return -x;
}
/**
* Calculate |x|. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function abs (int128 x) internal pure returns (int128) {
require (x != MIN_64x64);
return x < 0 ? -x : x;
}
/**
* Calculate 1 / x rounding towards zero. Revert on overflow or when x is
* zero.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function inv (int128 x) internal pure returns (int128) {
require (x != 0);
int256 result = int256 (0x100000000000000000000000000000000) / x;
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
/**
* Calculate arithmetics average of x and y, i.e. (x + y) / 2 rounding down.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function avg (int128 x, int128 y) internal pure returns (int128) {
return int128 ((int256 (x) + int256 (y)) >> 1);
}
/**
* Calculate geometric average of x and y, i.e. sqrt (x * y) rounding down.
* Revert on overflow or in case x * y is negative.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function gavg (int128 x, int128 y) internal pure returns (int128) {
int256 m = int256 (x) * int256 (y);
require (m >= 0);
require (m <
0x4000000000000000000000000000000000000000000000000000000000000000);
return int128 (sqrtu (uint256 (m)));
}
/**
* Calculate x^y assuming 0^0 is 1, where x is signed 64.64 fixed point number
* and y is unsigned 256-bit integer number. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y uint256 value
* @return signed 64.64-bit fixed point number
*/
function pow (int128 x, uint256 y) internal pure returns (int128) {
bool negative = x < 0 && y & 1 == 1;
uint256 absX = uint128 (x < 0 ? -x : x);
uint256 absResult;
absResult = 0x100000000000000000000000000000000;
if (absX <= 0x10000000000000000) {
absX <<= 63;
while (y != 0) {
if (y & 0x1 != 0) {
absResult = absResult * absX >> 127;
}
absX = absX * absX >> 127;
if (y & 0x2 != 0) {
absResult = absResult * absX >> 127;
}
absX = absX * absX >> 127;
if (y & 0x4 != 0) {
absResult = absResult * absX >> 127;
}
absX = absX * absX >> 127;
if (y & 0x8 != 0) {
absResult = absResult * absX >> 127;
}
absX = absX * absX >> 127;
y >>= 4;
}
absResult >>= 64;
} else {
uint256 absXShift = 63;
if (absX < 0x1000000000000000000000000) { absX <<= 32; absXShift -= 32; }
if (absX < 0x10000000000000000000000000000) { absX <<= 16; absXShift -= 16; }
if (absX < 0x1000000000000000000000000000000) { absX <<= 8; absXShift -= 8; }
if (absX < 0x10000000000000000000000000000000) { absX <<= 4; absXShift -= 4; }
if (absX < 0x40000000000000000000000000000000) { absX <<= 2; absXShift -= 2; }
if (absX < 0x80000000000000000000000000000000) { absX <<= 1; absXShift -= 1; }
uint256 resultShift = 0;
while (y != 0) {
require (absXShift < 64);
if (y & 0x1 != 0) {
absResult = absResult * absX >> 127;
resultShift += absXShift;
if (absResult > 0x100000000000000000000000000000000) {
absResult >>= 1;
resultShift += 1;
}
}
absX = absX * absX >> 127;
absXShift <<= 1;
if (absX >= 0x100000000000000000000000000000000) {
absX >>= 1;
absXShift += 1;
}
y >>= 1;
}
require (resultShift < 64);
absResult >>= 64 - resultShift;
}
int256 result = negative ? -int256 (absResult) : int256 (absResult);
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
/**
* Calculate sqrt (x) rounding down. Revert if x < 0.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function sqrt (int128 x) internal pure returns (int128) {
require (x >= 0);
return int128 (sqrtu (uint256 (x) << 64));
}
/**
* Calculate binary logarithm of x. Revert if x <= 0.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function log_2 (int128 x) internal pure returns (int128) {
require (x > 0);
int256 msb = 0;
int256 xc = x;
if (xc >= 0x10000000000000000) { xc >>= 64; msb += 64; }
if (xc >= 0x100000000) { xc >>= 32; msb += 32; }
if (xc >= 0x10000) { xc >>= 16; msb += 16; }
if (xc >= 0x100) { xc >>= 8; msb += 8; }
if (xc >= 0x10) { xc >>= 4; msb += 4; }
if (xc >= 0x4) { xc >>= 2; msb += 2; }
if (xc >= 0x2) msb += 1; // No need to shift xc anymore
int256 result = msb - 64 << 64;
uint256 ux = uint256 (x) << uint256 (127 - msb);
for (int256 bit = 0x8000000000000000; bit > 0; bit >>= 1) {
ux *= ux;
uint256 b = ux >> 255;
ux >>= 127 + b;
result += bit * int256 (b);
}
return int128 (result);
}
/**
* Calculate natural logarithm of x. Revert if x <= 0.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function ln (int128 x) internal pure returns (int128) {
require (x > 0);
return int128 (
uint256 (log_2 (x)) * 0xB17217F7D1CF79ABC9E3B39803F2F6AF >> 128);
}
/**
* Calculate binary exponent of x. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function exp_2 (int128 x) internal pure returns (int128) {
require (x < 0x400000000000000000); // Overflow
if (x < -0x400000000000000000) return 0; // Underflow
uint256 result = 0x80000000000000000000000000000000;
if (x & 0x8000000000000000 > 0)
result = result * 0x16A09E667F3BCC908B2FB1366EA957D3E >> 128;
if (x & 0x4000000000000000 > 0)
result = result * 0x1306FE0A31B7152DE8D5A46305C85EDEC >> 128;
if (x & 0x2000000000000000 > 0)
result = result * 0x1172B83C7D517ADCDF7C8C50EB14A791F >> 128;
if (x & 0x1000000000000000 > 0)
result = result * 0x10B5586CF9890F6298B92B71842A98363 >> 128;
if (x & 0x800000000000000 > 0)
result = result * 0x1059B0D31585743AE7C548EB68CA417FD >> 128;
if (x & 0x400000000000000 > 0)
result = result * 0x102C9A3E778060EE6F7CACA4F7A29BDE8 >> 128;
if (x & 0x200000000000000 > 0)
result = result * 0x10163DA9FB33356D84A66AE336DCDFA3F >> 128;
if (x & 0x100000000000000 > 0)
result = result * 0x100B1AFA5ABCBED6129AB13EC11DC9543 >> 128;
if (x & 0x80000000000000 > 0)
result = result * 0x10058C86DA1C09EA1FF19D294CF2F679B >> 128;
if (x & 0x40000000000000 > 0)
result = result * 0x1002C605E2E8CEC506D21BFC89A23A00F >> 128;
if (x & 0x20000000000000 > 0)
result = result * 0x100162F3904051FA128BCA9C55C31E5DF >> 128;
if (x & 0x10000000000000 > 0)
result = result * 0x1000B175EFFDC76BA38E31671CA939725 >> 128;
if (x & 0x8000000000000 > 0)
result = result * 0x100058BA01FB9F96D6CACD4B180917C3D >> 128;
if (x & 0x4000000000000 > 0)
result = result * 0x10002C5CC37DA9491D0985C348C68E7B3 >> 128;
if (x & 0x2000000000000 > 0)
result = result * 0x1000162E525EE054754457D5995292026 >> 128;
if (x & 0x1000000000000 > 0)
result = result * 0x10000B17255775C040618BF4A4ADE83FC >> 128;
if (x & 0x800000000000 > 0)
result = result * 0x1000058B91B5BC9AE2EED81E9B7D4CFAB >> 128;
if (x & 0x400000000000 > 0)
result = result * 0x100002C5C89D5EC6CA4D7C8ACC017B7C9 >> 128;
if (x & 0x200000000000 > 0)
result = result * 0x10000162E43F4F831060E02D839A9D16D >> 128;
if (x & 0x100000000000 > 0)
result = result * 0x100000B1721BCFC99D9F890EA06911763 >> 128;
if (x & 0x80000000000 > 0)
result = result * 0x10000058B90CF1E6D97F9CA14DBCC1628 >> 128;
if (x & 0x40000000000 > 0)
result = result * 0x1000002C5C863B73F016468F6BAC5CA2B >> 128;
if (x & 0x20000000000 > 0)
result = result * 0x100000162E430E5A18F6119E3C02282A5 >> 128;
if (x & 0x10000000000 > 0)
result = result * 0x1000000B1721835514B86E6D96EFD1BFE >> 128;
if (x & 0x8000000000 > 0)
result = result * 0x100000058B90C0B48C6BE5DF846C5B2EF >> 128;
if (x & 0x4000000000 > 0)
result = result * 0x10000002C5C8601CC6B9E94213C72737A >> 128;
if (x & 0x2000000000 > 0)
result = result * 0x1000000162E42FFF037DF38AA2B219F06 >> 128;
if (x & 0x1000000000 > 0)
result = result * 0x10000000B17217FBA9C739AA5819F44F9 >> 128;
if (x & 0x800000000 > 0)
result = result * 0x1000000058B90BFCDEE5ACD3C1CEDC823 >> 128;
if (x & 0x400000000 > 0)
result = result * 0x100000002C5C85FE31F35A6A30DA1BE50 >> 128;
if (x & 0x200000000 > 0)
result = result * 0x10000000162E42FF0999CE3541B9FFFCF >> 128;
if (x & 0x100000000 > 0)
result = result * 0x100000000B17217F80F4EF5AADDA45554 >> 128;
if (x & 0x80000000 > 0)
result = result * 0x10000000058B90BFBF8479BD5A81B51AD >> 128;
if (x & 0x40000000 > 0)
result = result * 0x1000000002C5C85FDF84BD62AE30A74CC >> 128;
if (x & 0x20000000 > 0)
result = result * 0x100000000162E42FEFB2FED257559BDAA >> 128;
if (x & 0x10000000 > 0)
result = result * 0x1000000000B17217F7D5A7716BBA4A9AE >> 128;
if (x & 0x8000000 > 0)
result = result * 0x100000000058B90BFBE9DDBAC5E109CCE >> 128;
if (x & 0x4000000 > 0)
result = result * 0x10000000002C5C85FDF4B15DE6F17EB0D >> 128;
if (x & 0x2000000 > 0)
result = result * 0x1000000000162E42FEFA494F1478FDE05 >> 128;
if (x & 0x1000000 > 0)
result = result * 0x10000000000B17217F7D20CF927C8E94C >> 128;
if (x & 0x800000 > 0)
result = result * 0x1000000000058B90BFBE8F71CB4E4B33D >> 128;
if (x & 0x400000 > 0)
result = result * 0x100000000002C5C85FDF477B662B26945 >> 128;
if (x & 0x200000 > 0)
result = result * 0x10000000000162E42FEFA3AE53369388C >> 128;
if (x & 0x100000 > 0)
result = result * 0x100000000000B17217F7D1D351A389D40 >> 128;
if (x & 0x80000 > 0)
result = result * 0x10000000000058B90BFBE8E8B2D3D4EDE >> 128;
if (x & 0x40000 > 0)
result = result * 0x1000000000002C5C85FDF4741BEA6E77E >> 128;
if (x & 0x20000 > 0)
result = result * 0x100000000000162E42FEFA39FE95583C2 >> 128;
if (x & 0x10000 > 0)
result = result * 0x1000000000000B17217F7D1CFB72B45E1 >> 128;
if (x & 0x8000 > 0)
result = result * 0x100000000000058B90BFBE8E7CC35C3F0 >> 128;
if (x & 0x4000 > 0)
result = result * 0x10000000000002C5C85FDF473E242EA38 >> 128;
if (x & 0x2000 > 0)
result = result * 0x1000000000000162E42FEFA39F02B772C >> 128;
if (x & 0x1000 > 0)
result = result * 0x10000000000000B17217F7D1CF7D83C1A >> 128;
if (x & 0x800 > 0)
result = result * 0x1000000000000058B90BFBE8E7BDCBE2E >> 128;
if (x & 0x400 > 0)
result = result * 0x100000000000002C5C85FDF473DEA871F >> 128;
if (x & 0x200 > 0)
result = result * 0x10000000000000162E42FEFA39EF44D91 >> 128;
if (x & 0x100 > 0)
result = result * 0x100000000000000B17217F7D1CF79E949 >> 128;
if (x & 0x80 > 0)
result = result * 0x10000000000000058B90BFBE8E7BCE544 >> 128;
if (x & 0x40 > 0)
result = result * 0x1000000000000002C5C85FDF473DE6ECA >> 128;
if (x & 0x20 > 0)
result = result * 0x100000000000000162E42FEFA39EF366F >> 128;
if (x & 0x10 > 0)
result = result * 0x1000000000000000B17217F7D1CF79AFA >> 128;
if (x & 0x8 > 0)
result = result * 0x100000000000000058B90BFBE8E7BCD6D >> 128;
if (x & 0x4 > 0)
result = result * 0x10000000000000002C5C85FDF473DE6B2 >> 128;
if (x & 0x2 > 0)
result = result * 0x1000000000000000162E42FEFA39EF358 >> 128;
if (x & 0x1 > 0)
result = result * 0x10000000000000000B17217F7D1CF79AB >> 128;
result >>= uint256 (63 - (x >> 64));
require (result <= uint256 (MAX_64x64));
return int128 (result);
}
/**
* Calculate natural exponent of x. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function exp (int128 x) internal pure returns (int128) {
require (x < 0x400000000000000000); // Overflow
if (x < -0x400000000000000000) return 0; // Underflow
return exp_2 (
int128 (int256 (x) * 0x171547652B82FE1777D0FFDA0D23A7D12 >> 128));
}
/**
* Calculate x / y rounding towards zero, where x and y are unsigned 256-bit
* integer numbers. Revert on overflow or when y is zero.
*
* @param x unsigned 256-bit integer number
* @param y unsigned 256-bit integer number
* @return unsigned 64.64-bit fixed point number
*/
function divuu (uint256 x, uint256 y) private pure returns (uint128) {
require (y != 0);
uint256 result;
if (x <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)
result = (x << 64) / y;
else {
uint256 msb = 192;
uint256 xc = x >> 192;
if (xc >= 0x100000000) { xc >>= 32; msb += 32; }
if (xc >= 0x10000) { xc >>= 16; msb += 16; }
if (xc >= 0x100) { xc >>= 8; msb += 8; }
if (xc >= 0x10) { xc >>= 4; msb += 4; }
if (xc >= 0x4) { xc >>= 2; msb += 2; }
if (xc >= 0x2) msb += 1; // No need to shift xc anymore
result = (x << 255 - msb) / ((y - 1 >> msb - 191) + 1);
require (result <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
uint256 hi = result * (y >> 128);
uint256 lo = result * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
uint256 xh = x >> 192;
uint256 xl = x << 64;
if (xl < lo) xh -= 1;
xl -= lo; // We rely on overflow behavior here
lo = hi << 128;
if (xl < lo) xh -= 1;
xl -= lo; // We rely on overflow behavior here
assert (xh == hi >> 128);
result += xl / y;
}
require (result <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
return uint128 (result);
}
/**
* Calculate sqrt (x) rounding down, where x is unsigned 256-bit integer
* number.
*
* @param x unsigned 256-bit integer number
* @return unsigned 128-bit integer number
*/
function sqrtu (uint256 x) private pure returns (uint128) {
if (x == 0) return 0;
else {
uint256 xx = x;
uint256 r = 1;
if (xx >= 0x100000000000000000000000000000000) { xx >>= 128; r <<= 64; }
if (xx >= 0x10000000000000000) { xx >>= 64; r <<= 32; }
if (xx >= 0x100000000) { xx >>= 32; r <<= 16; }
if (xx >= 0x10000) { xx >>= 16; r <<= 8; }
if (xx >= 0x100) { xx >>= 8; r <<= 4; }
if (xx >= 0x10) { xx >>= 4; r <<= 2; }
if (xx >= 0x8) { r <<= 1; }
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1; // Seven iterations should be enough
uint256 r1 = x / r;
return uint128 (r < r1 ? r : r1);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0;
import "./AggregatorInterface.sol";
import "./AggregatorV3Interface.sol";
interface AggregatorV2V3Interface is AggregatorInterface, AggregatorV3Interface
{
}
// SPDX-License-Identifier: GPL-v3
pragma solidity >=0.7.0;
/// @notice Used as a wrapper for tokens that are interest bearing for an
/// underlying token. Follows the cToken interface, however, can be adapted
/// for other interest bearing tokens.
interface AssetRateAdapter {
function token() external view returns (address);
function decimals() external view returns (uint8);
function description() external view returns (string memory);
function version() external view returns (uint256);
function underlying() external view returns (address);
function getExchangeRateStateful() external returns (int256);
function getExchangeRateView() external view returns (int256);
function getAnnualizedSupplyRate() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0;
interface AggregatorInterface {
function latestAnswer() external view returns (int256);
function latestTimestamp() external view returns (uint256);
function latestRound() external view returns (uint256);
function getAnswer(uint256 roundId) external view returns (int256);
function getTimestamp(uint256 roundId) external view returns (uint256);
event AnswerUpdated(int256 indexed current, uint256 indexed roundId, uint256 updatedAt);
event NewRound(uint256 indexed roundId, address indexed startedBy, uint256 startedAt);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0;
interface AggregatorV3Interface {
function decimals() external view returns (uint8);
function description() external view returns (string memory);
function version() external view returns (uint256);
// getRoundData and latestRoundData should both raise "No data present"
// if they do not have data to report, instead of returning unset values
// which could be misinterpreted as actual reported values.
function getRoundData(uint80 _roundId)
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
function latestRoundData()
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
interface IRewarder {
function claimRewards(
address account,
uint16 currencyId,
uint256 nTokenBalanceBefore,
uint256 nTokenBalanceAfter,
int256 netNTokenSupplyChange,
uint256 NOTETokensClaimed
) external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
struct LendingPoolStorage {
ILendingPool lendingPool;
}
interface ILendingPool {
/**
* @dev Deposits an `amount` of underlying asset into the reserve, receiving in return overlying aTokens.
* - E.g. User deposits 100 USDC and gets in return 100 aUSDC
* @param asset The address of the underlying asset to deposit
* @param amount The amount to be deposited
* @param onBehalfOf The address that will receive the aTokens, same as msg.sender if the user
* wants to receive them on his own wallet, or a different address if the beneficiary of aTokens
* is a different wallet
* @param referralCode Code used to register the integrator originating the operation, for potential rewards.
* 0 if the action is executed directly by the user, without any middle-man
**/
function deposit(
address asset,
uint256 amount,
address onBehalfOf,
uint16 referralCode
) external;
/**
* @dev Withdraws an `amount` of underlying asset from the reserve, burning the equivalent aTokens owned
* E.g. User has 100 aUSDC, calls withdraw() and receives 100 USDC, burning the 100 aUSDC
* @param asset The address of the underlying asset to withdraw
* @param amount The underlying amount to be withdrawn
* - Send the value type(uint256).max in order to withdraw the whole aToken balance
* @param to Address that will receive the underlying, same as msg.sender if the user
* wants to receive it on his own wallet, or a different address if the beneficiary is a
* different wallet
* @return The final amount withdrawn
**/
function withdraw(
address asset,
uint256 amount,
address to
) external returns (uint256);
/**
* @dev Returns the normalized income normalized income of the reserve
* @param asset The address of the underlying asset of the reserve
* @return The reserve's normalized income
*/
function getReserveNormalizedIncome(address asset) external view returns (uint256);
/**
* @dev Returns the state and configuration of the reserve
* @param asset The address of the underlying asset of the reserve
* @return The state of the reserve
**/
function getReserveData(address asset) external view returns (ReserveData memory);
// refer to the whitepaper, section 1.1 basic concepts for a formal description of these properties.
struct ReserveData {
//stores the reserve configuration
ReserveConfigurationMap configuration;
//the liquidity index. Expressed in ray
uint128 liquidityIndex;
//variable borrow index. Expressed in ray
uint128 variableBorrowIndex;
//the current supply rate. Expressed in ray
uint128 currentLiquidityRate;
//the current variable borrow rate. Expressed in ray
uint128 currentVariableBorrowRate;
//the current stable borrow rate. Expressed in ray
uint128 currentStableBorrowRate;
uint40 lastUpdateTimestamp;
//tokens addresses
address aTokenAddress;
address stableDebtTokenAddress;
address variableDebtTokenAddress;
//address of the interest rate strategy
address interestRateStrategyAddress;
//the id of the reserve. Represents the position in the list of the active reserves
uint8 id;
}
struct ReserveConfigurationMap {
//bit 0-15: LTV
//bit 16-31: Liq. threshold
//bit 32-47: Liq. bonus
//bit 48-55: Decimals
//bit 56: Reserve is active
//bit 57: reserve is frozen
//bit 58: borrowing is enabled
//bit 59: stable rate borrowing enabled
//bit 60-63: reserved
//bit 64-79: reserve factor
uint256 data;
}
struct UserConfigurationMap {
uint256 data;
}
enum InterestRateMode {NONE, STABLE, VARIABLE}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "./TokenHandler.sol";
import "../nToken/nTokenHandler.sol";
import "../nToken/nTokenSupply.sol";
import "../../math/SafeInt256.sol";
import "../../external/MigrateIncentives.sol";
import "../../../interfaces/notional/IRewarder.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
library Incentives {
using SafeMath for uint256;
using SafeInt256 for int256;
/// @notice Calculates the total incentives to claim including those claimed under the previous
/// less accurate calculation. Once an account is migrated it will only claim incentives under
/// the more accurate regime
function calculateIncentivesToClaim(
BalanceState memory balanceState,
address tokenAddress,
uint256 accumulatedNOTEPerNToken,
uint256 finalNTokenBalance
) internal view returns (uint256 incentivesToClaim) {
if (balanceState.lastClaimTime > 0) {
// If lastClaimTime is set then the account had incentives under the
// previous regime. Will calculate the final amount of incentives to claim here
// under the previous regime.
incentivesToClaim = MigrateIncentives.migrateAccountFromPreviousCalculation(
tokenAddress,
balanceState.storedNTokenBalance.toUint(),
balanceState.lastClaimTime,
// In this case the accountIncentiveDebt is stored as lastClaimIntegralSupply under
// the old calculation
balanceState.accountIncentiveDebt
);
// This marks the account as migrated and lastClaimTime will no longer be used
balanceState.lastClaimTime = 0;
// This value will be set immediately after this, set this to zero so that the calculation
// establishes a new baseline.
balanceState.accountIncentiveDebt = 0;
}
// If an account was migrated then they have no accountIncentivesDebt and should accumulate
// incentives based on their share since the new regime calculation started.
// If an account is just initiating their nToken balance then storedNTokenBalance will be zero
// and they will have no incentives to claim.
// This calculation uses storedNTokenBalance which is the balance of the account up until this point,
// this is important to ensure that the account does not claim for nTokens that they will mint or
// redeem on a going forward basis.
// The calculation below has the following precision:
// storedNTokenBalance (INTERNAL_TOKEN_PRECISION)
// MUL accumulatedNOTEPerNToken (INCENTIVE_ACCUMULATION_PRECISION)
// DIV INCENTIVE_ACCUMULATION_PRECISION
// = INTERNAL_TOKEN_PRECISION - (accountIncentivesDebt) INTERNAL_TOKEN_PRECISION
incentivesToClaim = incentivesToClaim.add(
balanceState.storedNTokenBalance.toUint()
.mul(accumulatedNOTEPerNToken)
.div(Constants.INCENTIVE_ACCUMULATION_PRECISION)
.sub(balanceState.accountIncentiveDebt)
);
// Update accountIncentivesDebt denominated in INTERNAL_TOKEN_PRECISION which marks the portion
// of the accumulatedNOTE that the account no longer has a claim over. Use the finalNTokenBalance
// here instead of storedNTokenBalance to mark the overall incentives claim that the account
// does not have a claim over. We do not aggregate this value with the previous accountIncentiveDebt
// because accumulatedNOTEPerNToken is already an aggregated value.
// The calculation below has the following precision:
// finalNTokenBalance (INTERNAL_TOKEN_PRECISION)
// MUL accumulatedNOTEPerNToken (INCENTIVE_ACCUMULATION_PRECISION)
// DIV INCENTIVE_ACCUMULATION_PRECISION
// = INTERNAL_TOKEN_PRECISION
balanceState.accountIncentiveDebt = finalNTokenBalance
.mul(accumulatedNOTEPerNToken)
.div(Constants.INCENTIVE_ACCUMULATION_PRECISION);
}
/// @notice Incentives must be claimed every time nToken balance changes.
/// @dev BalanceState.accountIncentiveDebt is updated in place here
function claimIncentives(
BalanceState memory balanceState,
address account,
uint256 finalNTokenBalance
) internal returns (uint256 incentivesToClaim) {
uint256 blockTime = block.timestamp;
address tokenAddress = nTokenHandler.nTokenAddress(balanceState.currencyId);
// This will updated the nToken storage and return what the accumulatedNOTEPerNToken
// is up until this current block time in 1e18 precision
uint256 accumulatedNOTEPerNToken = nTokenSupply.changeNTokenSupply(
tokenAddress,
balanceState.netNTokenSupplyChange,
blockTime
);
incentivesToClaim = calculateIncentivesToClaim(
balanceState,
tokenAddress,
accumulatedNOTEPerNToken,
finalNTokenBalance
);
// If a secondary incentive rewarder is set, then call it
IRewarder rewarder = nTokenHandler.getSecondaryRewarder(tokenAddress);
if (address(rewarder) != address(0)) {
rewarder.claimRewards(
account,
balanceState.currencyId,
// When this method is called from finalize, the storedNTokenBalance has not
// been updated to finalNTokenBalance yet so this is the balance before the change.
balanceState.storedNTokenBalance.toUint(),
finalNTokenBalance,
// When the rewarder is called, totalSupply has been updated already so may need to
// adjust its calculation using the net supply change figure here. Supply change
// may be zero when nTokens are transferred.
balanceState.netNTokenSupplyChange,
incentivesToClaim
);
}
if (incentivesToClaim > 0) TokenHandler.transferIncentive(account, incentivesToClaim);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../../math/SafeInt256.sol";
import "../../global/LibStorage.sol";
import "../../global/Types.sol";
import "../../global/Constants.sol";
import "../../global/Deployments.sol";
import "./protocols/AaveHandler.sol";
import "./protocols/CompoundHandler.sol";
import "./protocols/GenericToken.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
/// @notice Handles all external token transfers and events
library TokenHandler {
using SafeInt256 for int256;
using SafeMath for uint256;
function setMaxCollateralBalance(uint256 currencyId, uint72 maxCollateralBalance) internal {
mapping(uint256 => mapping(bool => TokenStorage)) storage store = LibStorage.getTokenStorage();
TokenStorage storage tokenStorage = store[currencyId][false];
tokenStorage.maxCollateralBalance = maxCollateralBalance;
}
function getAssetToken(uint256 currencyId) internal view returns (Token memory) {
return _getToken(currencyId, false);
}
function getUnderlyingToken(uint256 currencyId) internal view returns (Token memory) {
return _getToken(currencyId, true);
}
/// @notice Gets token data for a particular currency id, if underlying is set to true then returns
/// the underlying token. (These may not always exist)
function _getToken(uint256 currencyId, bool underlying) private view returns (Token memory) {
mapping(uint256 => mapping(bool => TokenStorage)) storage store = LibStorage.getTokenStorage();
TokenStorage storage tokenStorage = store[currencyId][underlying];
return
Token({
tokenAddress: tokenStorage.tokenAddress,
hasTransferFee: tokenStorage.hasTransferFee,
// No overflow, restricted on storage
decimals: int256(10**tokenStorage.decimalPlaces),
tokenType: tokenStorage.tokenType,
maxCollateralBalance: tokenStorage.maxCollateralBalance
});
}
/// @notice Sets a token for a currency id.
function setToken(
uint256 currencyId,
bool underlying,
TokenStorage memory tokenStorage
) internal {
mapping(uint256 => mapping(bool => TokenStorage)) storage store = LibStorage.getTokenStorage();
if (tokenStorage.tokenType == TokenType.Ether && currencyId == Constants.ETH_CURRENCY_ID) {
// Hardcoded parameters for ETH just to make sure we don't get it wrong.
TokenStorage storage ts = store[currencyId][true];
ts.tokenAddress = address(0);
ts.hasTransferFee = false;
ts.tokenType = TokenType.Ether;
ts.decimalPlaces = Constants.ETH_DECIMAL_PLACES;
ts.maxCollateralBalance = 0;
return;
}
// Check token address
require(tokenStorage.tokenAddress != address(0), "TH: address is zero");
// Once a token is set we cannot override it. In the case that we do need to do change a token address
// then we should explicitly upgrade this method to allow for a token to be changed.
Token memory token = _getToken(currencyId, underlying);
require(
token.tokenAddress == tokenStorage.tokenAddress || token.tokenAddress == address(0),
"TH: token cannot be reset"
);
require(0 < tokenStorage.decimalPlaces
&& tokenStorage.decimalPlaces <= Constants.MAX_DECIMAL_PLACES, "TH: invalid decimals");
// Validate token type
require(tokenStorage.tokenType != TokenType.Ether); // dev: ether can only be set once
if (underlying) {
// Underlying tokens cannot have max collateral balances, the contract only has a balance temporarily
// during mint and redeem actions.
require(tokenStorage.maxCollateralBalance == 0); // dev: underlying cannot have max collateral balance
require(tokenStorage.tokenType == TokenType.UnderlyingToken); // dev: underlying token inconsistent
} else {
require(tokenStorage.tokenType != TokenType.UnderlyingToken); // dev: underlying token inconsistent
}
if (tokenStorage.tokenType == TokenType.cToken || tokenStorage.tokenType == TokenType.aToken) {
// Set the approval for the underlying so that we can mint cTokens or aTokens
Token memory underlyingToken = getUnderlyingToken(currencyId);
// cTokens call transfer from the tokenAddress, but aTokens use the LendingPool
// to initiate all transfers
address approvalAddress = tokenStorage.tokenType == TokenType.cToken ?
tokenStorage.tokenAddress :
address(LibStorage.getLendingPool().lendingPool);
// ERC20 tokens should return true on success for an approval, but Tether
// does not return a value here so we use the NonStandard interface here to
// check that the approval was successful.
IEIP20NonStandard(underlyingToken.tokenAddress).approve(
approvalAddress,
type(uint256).max
);
GenericToken.checkReturnCode();
}
store[currencyId][underlying] = tokenStorage;
}
/**
* @notice If a token is mintable then will mint it. At this point we expect to have the underlying
* balance in the contract already.
* @param assetToken the asset token to mint
* @param underlyingAmountExternal the amount of underlying to transfer to the mintable token
* @return the amount of asset tokens minted, will always be a positive integer
*/
function mint(Token memory assetToken, uint16 currencyId, uint256 underlyingAmountExternal) internal returns (int256) {
// aTokens return the principal plus interest value when calling the balanceOf selector. We cannot use this
// value in internal accounting since it will not allow individual users to accrue aToken interest. Use the
// scaledBalanceOf function call instead for internal accounting.
bytes4 balanceOfSelector = assetToken.tokenType == TokenType.aToken ?
AaveHandler.scaledBalanceOfSelector :
GenericToken.defaultBalanceOfSelector;
uint256 startingBalance = GenericToken.checkBalanceViaSelector(assetToken.tokenAddress, address(this), balanceOfSelector);
if (assetToken.tokenType == TokenType.aToken) {
Token memory underlyingToken = getUnderlyingToken(currencyId);
AaveHandler.mint(underlyingToken, underlyingAmountExternal);
} else if (assetToken.tokenType == TokenType.cToken) {
CompoundHandler.mint(assetToken, underlyingAmountExternal);
} else if (assetToken.tokenType == TokenType.cETH) {
CompoundHandler.mintCETH(assetToken);
} else {
revert(); // dev: non mintable token
}
uint256 endingBalance = GenericToken.checkBalanceViaSelector(assetToken.tokenAddress, address(this), balanceOfSelector);
// This is the starting and ending balance in external precision
return SafeInt256.toInt(endingBalance.sub(startingBalance));
}
/**
* @notice If a token is redeemable to underlying will redeem it and transfer the underlying balance
* to the account
* @param assetToken asset token to redeem
* @param currencyId the currency id of the token
* @param account account to transfer the underlying to
* @param assetAmountExternal the amount to transfer in asset token denomination and external precision
* @return the actual amount of underlying tokens transferred. this is used as a return value back to the
* user, is not used for internal accounting purposes
*/
function redeem(
Token memory assetToken,
uint256 currencyId,
address account,
uint256 assetAmountExternal
) internal returns (int256) {
uint256 transferAmount;
if (assetToken.tokenType == TokenType.cETH) {
transferAmount = CompoundHandler.redeemCETH(assetToken, account, assetAmountExternal);
} else {
Token memory underlyingToken = getUnderlyingToken(currencyId);
if (assetToken.tokenType == TokenType.aToken) {
transferAmount = AaveHandler.redeem(underlyingToken, account, assetAmountExternal);
} else if (assetToken.tokenType == TokenType.cToken) {
transferAmount = CompoundHandler.redeem(assetToken, underlyingToken, account, assetAmountExternal);
} else {
revert(); // dev: non redeemable token
}
}
// Use the negative value here to signify that assets have left the protocol
return SafeInt256.toInt(transferAmount).neg();
}
/// @notice Handles transfers into and out of the system denominated in the external token decimal
/// precision.
function transfer(
Token memory token,
address account,
uint256 currencyId,
int256 netTransferExternal
) internal returns (int256 actualTransferExternal) {
// This will be true in all cases except for deposits where the token has transfer fees. For
// aTokens this value is set before convert from scaled balances to principal plus interest
actualTransferExternal = netTransferExternal;
if (token.tokenType == TokenType.aToken) {
Token memory underlyingToken = getUnderlyingToken(currencyId);
// aTokens need to be converted when we handle the transfer since the external balance format
// is not the same as the internal balance format that we use
netTransferExternal = AaveHandler.convertFromScaledBalanceExternal(
underlyingToken.tokenAddress,
netTransferExternal
);
}
if (netTransferExternal > 0) {
// Deposits must account for transfer fees.
int256 netDeposit = _deposit(token, account, uint256(netTransferExternal));
// If an aToken has a transfer fee this will still return a balance figure
// in scaledBalanceOf terms due to the selector
if (token.hasTransferFee) actualTransferExternal = netDeposit;
} else if (token.tokenType == TokenType.Ether) {
// netTransferExternal can only be negative or zero at this point
GenericToken.transferNativeTokenOut(account, uint256(netTransferExternal.neg()));
} else {
GenericToken.safeTransferOut(
token.tokenAddress,
account,
// netTransferExternal is zero or negative here
uint256(netTransferExternal.neg())
);
}
}
/// @notice Handles token deposits into Notional. If there is a transfer fee then we must
/// calculate the net balance after transfer. Amounts are denominated in the destination token's
/// precision.
function _deposit(
Token memory token,
address account,
uint256 amount
) private returns (int256) {
uint256 startingBalance;
uint256 endingBalance;
bytes4 balanceOfSelector = token.tokenType == TokenType.aToken ?
AaveHandler.scaledBalanceOfSelector :
GenericToken.defaultBalanceOfSelector;
if (token.hasTransferFee) {
startingBalance = GenericToken.checkBalanceViaSelector(token.tokenAddress, address(this), balanceOfSelector);
}
GenericToken.safeTransferIn(token.tokenAddress, account, amount);
if (token.hasTransferFee || token.maxCollateralBalance > 0) {
// If aTokens have a max collateral balance then it will be applied against the scaledBalanceOf. This is probably
// the correct behavior because if collateral accrues interest over time we should not somehow go over the
// maxCollateralBalance due to the passage of time.
endingBalance = GenericToken.checkBalanceViaSelector(token.tokenAddress, address(this), balanceOfSelector);
}
if (token.maxCollateralBalance > 0) {
int256 internalPrecisionBalance = convertToInternal(token, SafeInt256.toInt(endingBalance));
// Max collateral balance is stored as uint72, no overflow
require(internalPrecisionBalance <= SafeInt256.toInt(token.maxCollateralBalance)); // dev: over max collateral balance
}
// Math is done in uint inside these statements and will revert on negative
if (token.hasTransferFee) {
return SafeInt256.toInt(endingBalance.sub(startingBalance));
} else {
return SafeInt256.toInt(amount);
}
}
function convertToInternal(Token memory token, int256 amount) internal pure returns (int256) {
// If token decimals > INTERNAL_TOKEN_PRECISION:
// on deposit: resulting dust will accumulate to protocol
// on withdraw: protocol may lose dust amount. However, withdraws are only calculated based
// on a conversion from internal token precision to external token precision so therefore dust
// amounts cannot be specified for withdraws.
// If token decimals < INTERNAL_TOKEN_PRECISION then this will add zeros to the
// end of amount and will not result in dust.
if (token.decimals == Constants.INTERNAL_TOKEN_PRECISION) return amount;
return amount.mul(Constants.INTERNAL_TOKEN_PRECISION).div(token.decimals);
}
function convertToExternal(Token memory token, int256 amount) internal pure returns (int256) {
if (token.decimals == Constants.INTERNAL_TOKEN_PRECISION) return amount;
// If token decimals > INTERNAL_TOKEN_PRECISION then this will increase amount
// by adding a number of zeros to the end and will not result in dust.
// If token decimals < INTERNAL_TOKEN_PRECISION:
// on deposit: Deposits are specified in external token precision and there is no loss of precision when
// tokens are converted from external to internal precision
// on withdraw: this calculation will round down such that the protocol retains the residual cash balance
return amount.mul(token.decimals).div(Constants.INTERNAL_TOKEN_PRECISION);
}
function transferIncentive(address account, uint256 tokensToTransfer) internal {
GenericToken.safeTransferOut(Deployments.NOTE_TOKEN_ADDRESS, account, tokensToTransfer);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
import "./Bitmap.sol";
/**
* Packs an uint value into a "floating point" storage slot. Used for storing
* lastClaimIntegralSupply values in balance storage. For these values, we don't need
* to maintain exact precision but we don't want to be limited by storage size overflows.
*
* A floating point value is defined by the 48 most significant bits and an 8 bit number
* of bit shifts required to restore its precision. The unpacked value will always be less
* than the packed value with a maximum absolute loss of precision of (2 ** bitShift) - 1.
*/
library FloatingPoint56 {
function packTo56Bits(uint256 value) internal pure returns (uint56) {
uint256 bitShift;
// If the value is over the uint48 max value then we will shift it down
// given the index of the most significant bit. We store this bit shift
// in the least significant byte of the 56 bit slot available.
if (value > type(uint48).max) bitShift = (Bitmap.getMSB(value) - 47);
uint256 shiftedValue = value >> bitShift;
return uint56((shiftedValue << 8) | bitShift);
}
function unpackFrom56Bits(uint256 value) internal pure returns (uint256) {
// The least significant 8 bits will be the amount to bit shift
uint256 bitShift = uint256(uint8(value));
return ((value >> 8) << bitShift);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "./nTokenSupply.sol";
import "../markets/CashGroup.sol";
import "../markets/AssetRate.sol";
import "../portfolio/PortfolioHandler.sol";
import "../balances/BalanceHandler.sol";
import "../../global/LibStorage.sol";
import "../../math/SafeInt256.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
library nTokenHandler {
using SafeInt256 for int256;
/// @dev Mirror of the value in LibStorage, solidity compiler does not allow assigning
/// two constants to each other.
uint256 private constant NUM_NTOKEN_MARKET_FACTORS = 14;
/// @notice Returns an account context object that is specific to nTokens.
function getNTokenContext(address tokenAddress)
internal
view
returns (
uint16 currencyId,
uint256 incentiveAnnualEmissionRate,
uint256 lastInitializedTime,
uint8 assetArrayLength,
bytes5 parameters
)
{
mapping(address => nTokenContext) storage store = LibStorage.getNTokenContextStorage();
nTokenContext storage context = store[tokenAddress];
currencyId = context.currencyId;
incentiveAnnualEmissionRate = context.incentiveAnnualEmissionRate;
lastInitializedTime = context.lastInitializedTime;
assetArrayLength = context.assetArrayLength;
parameters = context.nTokenParameters;
}
/// @notice Returns the nToken token address for a given currency
function nTokenAddress(uint256 currencyId) internal view returns (address tokenAddress) {
mapping(uint256 => address) storage store = LibStorage.getNTokenAddressStorage();
return store[currencyId];
}
/// @notice Called by governance to set the nToken token address and its reverse lookup. Cannot be
/// reset once this is set.
function setNTokenAddress(uint16 currencyId, address tokenAddress) internal {
mapping(uint256 => address) storage addressStore = LibStorage.getNTokenAddressStorage();
require(addressStore[currencyId] == address(0), "PT: token address exists");
mapping(address => nTokenContext) storage contextStore = LibStorage.getNTokenContextStorage();
nTokenContext storage context = contextStore[tokenAddress];
require(context.currencyId == 0, "PT: currency exists");
// This will initialize all other context slots to zero
context.currencyId = currencyId;
addressStore[currencyId] = tokenAddress;
}
/// @notice Set nToken token collateral parameters
function setNTokenCollateralParameters(
address tokenAddress,
uint8 residualPurchaseIncentive10BPS,
uint8 pvHaircutPercentage,
uint8 residualPurchaseTimeBufferHours,
uint8 cashWithholdingBuffer10BPS,
uint8 liquidationHaircutPercentage
) internal {
mapping(address => nTokenContext) storage store = LibStorage.getNTokenContextStorage();
nTokenContext storage context = store[tokenAddress];
require(liquidationHaircutPercentage <= Constants.PERCENTAGE_DECIMALS, "Invalid haircut");
// The pv haircut percentage must be less than the liquidation percentage or else liquidators will not
// get profit for liquidating nToken.
require(pvHaircutPercentage < liquidationHaircutPercentage, "Invalid pv haircut");
// Ensure that the cash withholding buffer is greater than the residual purchase incentive or
// the nToken may not have enough cash to pay accounts to buy its negative ifCash
require(residualPurchaseIncentive10BPS <= cashWithholdingBuffer10BPS, "Invalid discounts");
bytes5 parameters =
(bytes5(uint40(residualPurchaseIncentive10BPS)) |
(bytes5(uint40(pvHaircutPercentage)) << 8) |
(bytes5(uint40(residualPurchaseTimeBufferHours)) << 16) |
(bytes5(uint40(cashWithholdingBuffer10BPS)) << 24) |
(bytes5(uint40(liquidationHaircutPercentage)) << 32));
// Set the parameters
context.nTokenParameters = parameters;
}
/// @notice Sets a secondary rewarder contract on an nToken so that incentives can come from a different
/// contract, aside from the native NOTE token incentives.
function setSecondaryRewarder(
uint16 currencyId,
IRewarder rewarder
) internal {
address tokenAddress = nTokenAddress(currencyId);
// nToken must exist for a secondary rewarder
require(tokenAddress != address(0));
mapping(address => nTokenContext) storage store = LibStorage.getNTokenContextStorage();
nTokenContext storage context = store[tokenAddress];
// Setting the rewarder to address(0) will disable it. We use a context setting here so that
// we can save a storage read before getting the rewarder
context.hasSecondaryRewarder = (address(rewarder) != address(0));
LibStorage.getSecondaryIncentiveRewarder()[tokenAddress] = rewarder;
}
/// @notice Returns the secondary rewarder if it is set
function getSecondaryRewarder(address tokenAddress) internal view returns (IRewarder) {
mapping(address => nTokenContext) storage store = LibStorage.getNTokenContextStorage();
nTokenContext storage context = store[tokenAddress];
if (context.hasSecondaryRewarder) {
return LibStorage.getSecondaryIncentiveRewarder()[tokenAddress];
} else {
return IRewarder(address(0));
}
}
function setArrayLengthAndInitializedTime(
address tokenAddress,
uint8 arrayLength,
uint256 lastInitializedTime
) internal {
require(lastInitializedTime >= 0 && uint256(lastInitializedTime) < type(uint32).max); // dev: next settle time overflow
mapping(address => nTokenContext) storage store = LibStorage.getNTokenContextStorage();
nTokenContext storage context = store[tokenAddress];
context.lastInitializedTime = uint32(lastInitializedTime);
context.assetArrayLength = arrayLength;
}
/// @notice Returns the array of deposit shares and leverage thresholds for nTokens
function getDepositParameters(uint256 currencyId, uint256 maxMarketIndex)
internal
view
returns (int256[] memory depositShares, int256[] memory leverageThresholds)
{
mapping(uint256 => uint32[NUM_NTOKEN_MARKET_FACTORS]) storage store = LibStorage.getNTokenDepositStorage();
uint32[NUM_NTOKEN_MARKET_FACTORS] storage depositParameters = store[currencyId];
(depositShares, leverageThresholds) = _getParameters(depositParameters, maxMarketIndex, false);
}
/// @notice Sets the deposit parameters
/// @dev We pack the values in alternating between the two parameters into either one or two
// storage slots depending on the number of markets. This is to save storage reads when we use the parameters.
function setDepositParameters(
uint256 currencyId,
uint32[] calldata depositShares,
uint32[] calldata leverageThresholds
) internal {
require(
depositShares.length <= Constants.MAX_TRADED_MARKET_INDEX,
"PT: deposit share length"
);
require(depositShares.length == leverageThresholds.length, "PT: leverage share length");
uint256 shareSum;
for (uint256 i; i < depositShares.length; i++) {
// This cannot overflow in uint 256 with 9 max slots
shareSum = shareSum + depositShares[i];
require(
leverageThresholds[i] > 0 && leverageThresholds[i] < Constants.RATE_PRECISION,
"PT: leverage threshold"
);
}
// Total deposit share must add up to 100%
require(shareSum == uint256(Constants.DEPOSIT_PERCENT_BASIS), "PT: deposit shares sum");
mapping(uint256 => uint32[NUM_NTOKEN_MARKET_FACTORS]) storage store = LibStorage.getNTokenDepositStorage();
uint32[NUM_NTOKEN_MARKET_FACTORS] storage depositParameters = store[currencyId];
_setParameters(depositParameters, depositShares, leverageThresholds);
}
/// @notice Sets the initialization parameters for the markets, these are read only when markets
/// are initialized
function setInitializationParameters(
uint256 currencyId,
uint32[] calldata annualizedAnchorRates,
uint32[] calldata proportions
) internal {
require(annualizedAnchorRates.length <= Constants.MAX_TRADED_MARKET_INDEX, "PT: annualized anchor rates length");
require(proportions.length == annualizedAnchorRates.length, "PT: proportions length");
for (uint256 i; i < proportions.length; i++) {
// Proportions must be between zero and the rate precision
require(annualizedAnchorRates[i] > 0, "NT: anchor rate zero");
require(
proportions[i] > 0 && proportions[i] < Constants.RATE_PRECISION,
"PT: invalid proportion"
);
}
mapping(uint256 => uint32[NUM_NTOKEN_MARKET_FACTORS]) storage store = LibStorage.getNTokenInitStorage();
uint32[NUM_NTOKEN_MARKET_FACTORS] storage initParameters = store[currencyId];
_setParameters(initParameters, annualizedAnchorRates, proportions);
}
/// @notice Returns the array of initialization parameters for a given currency.
function getInitializationParameters(uint256 currencyId, uint256 maxMarketIndex)
internal
view
returns (int256[] memory annualizedAnchorRates, int256[] memory proportions)
{
mapping(uint256 => uint32[NUM_NTOKEN_MARKET_FACTORS]) storage store = LibStorage.getNTokenInitStorage();
uint32[NUM_NTOKEN_MARKET_FACTORS] storage initParameters = store[currencyId];
(annualizedAnchorRates, proportions) = _getParameters(initParameters, maxMarketIndex, true);
}
function _getParameters(
uint32[NUM_NTOKEN_MARKET_FACTORS] storage slot,
uint256 maxMarketIndex,
bool noUnset
) private view returns (int256[] memory, int256[] memory) {
uint256 index = 0;
int256[] memory array1 = new int256[](maxMarketIndex);
int256[] memory array2 = new int256[](maxMarketIndex);
for (uint256 i; i < maxMarketIndex; i++) {
array1[i] = slot[index];
index++;
array2[i] = slot[index];
index++;
if (noUnset) {
require(array1[i] > 0 && array2[i] > 0, "PT: init value zero");
}
}
return (array1, array2);
}
function _setParameters(
uint32[NUM_NTOKEN_MARKET_FACTORS] storage slot,
uint32[] calldata array1,
uint32[] calldata array2
) private {
uint256 index = 0;
for (uint256 i = 0; i < array1.length; i++) {
slot[index] = array1[i];
index++;
slot[index] = array2[i];
index++;
}
}
function loadNTokenPortfolioNoCashGroup(nTokenPortfolio memory nToken, uint16 currencyId)
internal
view
{
nToken.tokenAddress = nTokenAddress(currencyId);
// prettier-ignore
(
/* currencyId */,
/* incentiveRate */,
uint256 lastInitializedTime,
uint8 assetArrayLength,
bytes5 parameters
) = getNTokenContext(nToken.tokenAddress);
// prettier-ignore
(
uint256 totalSupply,
/* accumulatedNOTEPerNToken */,
/* lastAccumulatedTime */
) = nTokenSupply.getStoredNTokenSupplyFactors(nToken.tokenAddress);
nToken.lastInitializedTime = lastInitializedTime;
nToken.totalSupply = int256(totalSupply);
nToken.parameters = parameters;
nToken.portfolioState = PortfolioHandler.buildPortfolioState(
nToken.tokenAddress,
assetArrayLength,
0
);
// prettier-ignore
(
nToken.cashBalance,
/* nTokenBalance */,
/* lastClaimTime */,
/* accountIncentiveDebt */
) = BalanceHandler.getBalanceStorage(nToken.tokenAddress, currencyId);
}
/// @notice Uses buildCashGroupStateful
function loadNTokenPortfolioStateful(nTokenPortfolio memory nToken, uint16 currencyId)
internal
{
loadNTokenPortfolioNoCashGroup(nToken, currencyId);
nToken.cashGroup = CashGroup.buildCashGroupStateful(currencyId);
}
/// @notice Uses buildCashGroupView
function loadNTokenPortfolioView(nTokenPortfolio memory nToken, uint16 currencyId)
internal
view
{
loadNTokenPortfolioNoCashGroup(nToken, currencyId);
nToken.cashGroup = CashGroup.buildCashGroupView(currencyId);
}
/// @notice Returns the next settle time for the nToken which is 1 quarter away
function getNextSettleTime(nTokenPortfolio memory nToken) internal pure returns (uint256) {
if (nToken.lastInitializedTime == 0) return 0;
return DateTime.getReferenceTime(nToken.lastInitializedTime) + Constants.QUARTER;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "./nTokenHandler.sol";
import "../../global/LibStorage.sol";
import "../../math/SafeInt256.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
library nTokenSupply {
using SafeInt256 for int256;
using SafeMath for uint256;
/// @notice Retrieves stored nToken supply and related factors. Do not use accumulatedNOTEPerNToken for calculating
/// incentives! Use `getUpdatedAccumulatedNOTEPerNToken` instead.
function getStoredNTokenSupplyFactors(address tokenAddress)
internal
view
returns (
uint256 totalSupply,
uint256 accumulatedNOTEPerNToken,
uint256 lastAccumulatedTime
)
{
mapping(address => nTokenTotalSupplyStorage) storage store = LibStorage.getNTokenTotalSupplyStorage();
nTokenTotalSupplyStorage storage nTokenStorage = store[tokenAddress];
totalSupply = nTokenStorage.totalSupply;
// NOTE: DO NOT USE THIS RETURNED VALUE FOR CALCULATING INCENTIVES. The accumulatedNOTEPerNToken
// must be updated given the block time. Use `getUpdatedAccumulatedNOTEPerNToken` instead
accumulatedNOTEPerNToken = nTokenStorage.accumulatedNOTEPerNToken;
lastAccumulatedTime = nTokenStorage.lastAccumulatedTime;
}
/// @notice Returns the updated accumulated NOTE per nToken for calculating incentives
function getUpdatedAccumulatedNOTEPerNToken(address tokenAddress, uint256 blockTime)
internal view
returns (
uint256 totalSupply,
uint256 accumulatedNOTEPerNToken,
uint256 lastAccumulatedTime
)
{
(
totalSupply,
accumulatedNOTEPerNToken,
lastAccumulatedTime
) = getStoredNTokenSupplyFactors(tokenAddress);
// nToken totalSupply is never allowed to drop to zero but we check this here to avoid
// divide by zero errors during initialization. Also ensure that lastAccumulatedTime is not
// zero to avoid a massive accumulation amount on initialization.
if (blockTime > lastAccumulatedTime && lastAccumulatedTime > 0 && totalSupply > 0) {
// prettier-ignore
(
/* currencyId */,
uint256 emissionRatePerYear,
/* initializedTime */,
/* assetArrayLength */,
/* parameters */
) = nTokenHandler.getNTokenContext(tokenAddress);
uint256 additionalNOTEAccumulatedPerNToken = _calculateAdditionalNOTE(
// Emission rate is denominated in whole tokens, scale to 1e8 decimals here
emissionRatePerYear.mul(uint256(Constants.INTERNAL_TOKEN_PRECISION)),
// Time since last accumulation (overflow checked above)
blockTime - lastAccumulatedTime,
totalSupply
);
accumulatedNOTEPerNToken = accumulatedNOTEPerNToken.add(additionalNOTEAccumulatedPerNToken);
require(accumulatedNOTEPerNToken < type(uint128).max); // dev: accumulated NOTE overflow
}
}
/// @notice additionalNOTEPerNToken accumulated since last accumulation time in 1e18 precision
function _calculateAdditionalNOTE(
uint256 emissionRatePerYear,
uint256 timeSinceLastAccumulation,
uint256 totalSupply
)
private
pure
returns (uint256)
{
// If we use 18 decimal places as the accumulation precision then we will overflow uint128 when
// a single nToken has accumulated 3.4 x 10^20 NOTE tokens. This isn't possible since the max
// NOTE that can accumulate is 10^16 (100 million NOTE in 1e8 precision) so we should be safe
// using 18 decimal places and uint128 storage slot
// timeSinceLastAccumulation (SECONDS)
// accumulatedNOTEPerSharePrecision (1e18)
// emissionRatePerYear (INTERNAL_TOKEN_PRECISION)
// DIVIDE BY
// YEAR (SECONDS)
// totalSupply (INTERNAL_TOKEN_PRECISION)
return timeSinceLastAccumulation
.mul(Constants.INCENTIVE_ACCUMULATION_PRECISION)
.mul(emissionRatePerYear)
.div(Constants.YEAR)
// totalSupply > 0 is checked in the calling function
.div(totalSupply);
}
/// @notice Updates the nToken token supply amount when minting or redeeming.
/// @param tokenAddress address of the nToken
/// @param netChange positive or negative change to the total nToken supply
/// @param blockTime current block time
/// @return accumulatedNOTEPerNToken updated to the given block time
function changeNTokenSupply(
address tokenAddress,
int256 netChange,
uint256 blockTime
) internal returns (uint256) {
(
uint256 totalSupply,
uint256 accumulatedNOTEPerNToken,
/* uint256 lastAccumulatedTime */
) = getUpdatedAccumulatedNOTEPerNToken(tokenAddress, blockTime);
// Update storage variables
mapping(address => nTokenTotalSupplyStorage) storage store = LibStorage.getNTokenTotalSupplyStorage();
nTokenTotalSupplyStorage storage nTokenStorage = store[tokenAddress];
int256 newTotalSupply = int256(totalSupply).add(netChange);
// We allow newTotalSupply to equal zero here even though it is prevented from being redeemed down to
// exactly zero by other internal logic inside nTokenRedeem. This is meant to be purely an overflow check.
require(0 <= newTotalSupply && uint256(newTotalSupply) < type(uint96).max); // dev: nToken supply overflow
nTokenStorage.totalSupply = uint96(newTotalSupply);
// NOTE: overflow checked inside getUpdatedAccumulatedNOTEPerNToken so that behavior here mirrors what
// the user would see if querying the view function
nTokenStorage.accumulatedNOTEPerNToken = uint128(accumulatedNOTEPerNToken);
require(blockTime < type(uint32).max); // dev: block time overflow
nTokenStorage.lastAccumulatedTime = uint32(blockTime);
return accumulatedNOTEPerNToken;
}
/// @notice Called by governance to set the new emission rate
function setIncentiveEmissionRate(address tokenAddress, uint32 newEmissionsRate, uint256 blockTime) internal {
// Ensure that the accumulatedNOTEPerNToken updates to the current block time before we update the
// emission rate
changeNTokenSupply(tokenAddress, 0, blockTime);
mapping(address => nTokenContext) storage store = LibStorage.getNTokenContextStorage();
nTokenContext storage context = store[tokenAddress];
context.incentiveAnnualEmissionRate = newEmissionsRate;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../global/LibStorage.sol";
import "../internal/nToken/nTokenHandler.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
/**
* @notice Deployed library for migration of incentives from the old (inaccurate) calculation
* to a newer, more accurate calculation based on SushiSwap MasterChef math. The more accurate
* calculation is inside `Incentives.sol` and this library holds the legacy calculation. System
* migration code can be found in `MigrateIncentivesFix.sol`
*/
library MigrateIncentives {
using SafeMath for uint256;
/// @notice Calculates the claimable incentives for a particular nToken and account in the
/// previous regime. This should only ever be called ONCE for an account / currency combination
/// to get the incentives accrued up until the migration date.
function migrateAccountFromPreviousCalculation(
address tokenAddress,
uint256 nTokenBalance,
uint256 lastClaimTime,
uint256 lastClaimIntegralSupply
) external view returns (uint256) {
(
uint256 finalEmissionRatePerYear,
uint256 finalTotalIntegralSupply,
uint256 finalMigrationTime
) = _getMigratedIncentiveValues(tokenAddress);
// This if statement should never be true but we return 0 just in case
if (lastClaimTime == 0 || lastClaimTime >= finalMigrationTime) return 0;
// No overflow here, checked above. All incentives are claimed up until finalMigrationTime
// using the finalTotalIntegralSupply. Both these values are set on migration and will not
// change.
uint256 timeSinceMigration = finalMigrationTime - lastClaimTime;
// (timeSinceMigration * INTERNAL_TOKEN_PRECISION * finalEmissionRatePerYear) / YEAR
uint256 incentiveRate =
timeSinceMigration
.mul(uint256(Constants.INTERNAL_TOKEN_PRECISION))
// Migration emission rate is stored as is, denominated in whole tokens
.mul(finalEmissionRatePerYear).mul(uint256(Constants.INTERNAL_TOKEN_PRECISION))
.div(Constants.YEAR);
// Returns the average supply using the integral of the total supply.
uint256 avgTotalSupply = finalTotalIntegralSupply.sub(lastClaimIntegralSupply).div(timeSinceMigration);
if (avgTotalSupply == 0) return 0;
uint256 incentivesToClaim = nTokenBalance.mul(incentiveRate).div(avgTotalSupply);
// incentiveRate has a decimal basis of 1e16 so divide by token precision to reduce to 1e8
incentivesToClaim = incentivesToClaim.div(uint256(Constants.INTERNAL_TOKEN_PRECISION));
return incentivesToClaim;
}
function _getMigratedIncentiveValues(
address tokenAddress
) private view returns (
uint256 finalEmissionRatePerYear,
uint256 finalTotalIntegralSupply,
uint256 finalMigrationTime
) {
mapping(address => nTokenTotalSupplyStorage_deprecated) storage store = LibStorage.getDeprecatedNTokenTotalSupplyStorage();
nTokenTotalSupplyStorage_deprecated storage d_nTokenStorage = store[tokenAddress];
// The total supply value is overridden as emissionRatePerYear during the initialization
finalEmissionRatePerYear = d_nTokenStorage.totalSupply;
finalTotalIntegralSupply = d_nTokenStorage.integralTotalSupply;
finalMigrationTime = d_nTokenStorage.lastSupplyChangeTime;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
/// @title Hardcoded deployed contracts are listed here. These are hardcoded to reduce
/// gas costs for immutable addresses. They must be updated per environment that Notional
/// is deployed to.
library Deployments {
address internal constant NOTE_TOKEN_ADDRESS = 0xCFEAead4947f0705A14ec42aC3D44129E1Ef3eD5;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../../../global/Types.sol";
import "../../../global/LibStorage.sol";
import "../../../math/SafeInt256.sol";
import "../TokenHandler.sol";
import "../../../../interfaces/aave/IAToken.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
library AaveHandler {
using SafeMath for uint256;
using SafeInt256 for int256;
int256 internal constant RAY = 1e27;
int256 internal constant halfRAY = RAY / 2;
bytes4 internal constant scaledBalanceOfSelector = IAToken.scaledBalanceOf.selector;
/**
* @notice Mints an amount of aTokens corresponding to the the underlying.
* @param underlyingToken address of the underlying token to pass to Aave
* @param underlyingAmountExternal amount of underlying to deposit, in external precision
*/
function mint(Token memory underlyingToken, uint256 underlyingAmountExternal) internal {
// In AaveV3 this method is renamed to supply() but deposit() is still available for
// backwards compatibility: https://github.com/aave/aave-v3-core/blob/master/contracts/protocol/pool/Pool.sol#L755
// We use deposit here so that mainnet-fork tests against Aave v2 will pass.
LibStorage.getLendingPool().lendingPool.deposit(
underlyingToken.tokenAddress,
underlyingAmountExternal,
address(this),
0
);
}
/**
* @notice Redeems and sends an amount of aTokens to the specified account
* @param underlyingToken address of the underlying token to pass to Aave
* @param account account to receive the underlying
* @param assetAmountExternal amount of aTokens in scaledBalanceOf terms
*/
function redeem(
Token memory underlyingToken,
address account,
uint256 assetAmountExternal
) internal returns (uint256 underlyingAmountExternal) {
underlyingAmountExternal = convertFromScaledBalanceExternal(
underlyingToken.tokenAddress,
SafeInt256.toInt(assetAmountExternal)
).toUint();
LibStorage.getLendingPool().lendingPool.withdraw(
underlyingToken.tokenAddress,
underlyingAmountExternal,
account
);
}
/**
* @notice Takes an assetAmountExternal (in this case is the Aave balanceOf representing principal plus interest)
* and returns another assetAmountExternal value which represents the Aave scaledBalanceOf (representing a proportional
* claim on Aave principal plus interest onto the future). This conversion ensures that depositors into Notional will
* receive future Aave interest.
* @dev There is no loss of precision within this function since it does the exact same calculation as Aave.
* @param currencyId is the currency id
* @param assetAmountExternal an Aave token amount representing principal plus interest supplied by the user. This must
* be positive in this function, this method is only called when depositing aTokens directly
* @return scaledAssetAmountExternal the Aave scaledBalanceOf equivalent. The decimal precision of this value will
* be in external precision.
*/
function convertToScaledBalanceExternal(uint256 currencyId, int256 assetAmountExternal) internal view returns (int256) {
if (assetAmountExternal == 0) return 0;
require(assetAmountExternal > 0);
Token memory underlyingToken = TokenHandler.getUnderlyingToken(currencyId);
// We know that this value must be positive
int256 index = _getReserveNormalizedIncome(underlyingToken.tokenAddress);
// Mimic the WadRay math performed by Aave (but do it in int256 instead)
int256 halfIndex = index / 2;
// Overflow will occur when: (a * RAY + halfIndex) > int256.max
require(assetAmountExternal <= (type(int256).max - halfIndex) / RAY);
// if index is zero then this will revert
return (assetAmountExternal * RAY + halfIndex) / index;
}
/**
* @notice Takes an assetAmountExternal (in this case is the internal scaledBalanceOf in external decimal precision)
* and returns another assetAmountExternal value which represents the Aave balanceOf representing the principal plus interest
* that will be transferred. This is required to maintain compatibility with Aave's ERC20 transfer functions.
* @dev There is no loss of precision because this does exactly what Aave's calculation would do
* @param underlyingToken token address of the underlying asset
* @param netScaledBalanceExternal an amount representing the scaledBalanceOf in external decimal precision calculated from
* Notional cash balances. This amount may be positive or negative depending on if assets are being deposited (positive) or
* withdrawn (negative).
* @return netBalanceExternal the Aave balanceOf equivalent as a signed integer
*/
function convertFromScaledBalanceExternal(address underlyingToken, int256 netScaledBalanceExternal) internal view returns (int256 netBalanceExternal) {
if (netScaledBalanceExternal == 0) return 0;
// We know that this value must be positive
int256 index = _getReserveNormalizedIncome(underlyingToken);
// Use the absolute value here so that the halfRay rounding is applied correctly for negative values
int256 abs = netScaledBalanceExternal.abs();
// Mimic the WadRay math performed by Aave (but do it in int256 instead)
// Overflow will occur when: (abs * index + halfRay) > int256.max
// Here the first term is computed at compile time so it just does a division. If index is zero then
// solidity will revert.
require(abs <= (type(int256).max - halfRAY) / index);
int256 absScaled = (abs * index + halfRAY) / RAY;
return netScaledBalanceExternal > 0 ? absScaled : absScaled.neg();
}
/// @dev getReserveNormalizedIncome returns a uint256, so we know that the return value here is
/// always positive even though we are converting to a signed int
function _getReserveNormalizedIncome(address underlyingAsset) private view returns (int256) {
return
SafeInt256.toInt(
LibStorage.getLendingPool().lendingPool.getReserveNormalizedIncome(underlyingAsset)
);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "./GenericToken.sol";
import "../../../../interfaces/compound/CErc20Interface.sol";
import "../../../../interfaces/compound/CEtherInterface.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../global/Types.sol";
library CompoundHandler {
using SafeMath for uint256;
// Return code for cTokens that represents no error
uint256 internal constant COMPOUND_RETURN_CODE_NO_ERROR = 0;
function mintCETH(Token memory token) internal {
// Reverts on error
CEtherInterface(token.tokenAddress).mint{value: msg.value}();
}
function mint(Token memory token, uint256 underlyingAmountExternal) internal returns (int256) {
uint256 success = CErc20Interface(token.tokenAddress).mint(underlyingAmountExternal);
require(success == COMPOUND_RETURN_CODE_NO_ERROR, "Mint");
}
function redeemCETH(
Token memory assetToken,
address account,
uint256 assetAmountExternal
) internal returns (uint256 underlyingAmountExternal) {
// Although the contract should never end with any ETH or underlying token balances, we still do this
// starting and ending check in the case that tokens are accidentally sent to the contract address. They
// will not be sent to some lucky address in a windfall.
uint256 startingBalance = address(this).balance;
uint256 success = CErc20Interface(assetToken.tokenAddress).redeem(assetAmountExternal);
require(success == COMPOUND_RETURN_CODE_NO_ERROR, "Redeem");
uint256 endingBalance = address(this).balance;
underlyingAmountExternal = endingBalance.sub(startingBalance);
// Withdraws the underlying amount out to the destination account
GenericToken.transferNativeTokenOut(account, underlyingAmountExternal);
}
function redeem(
Token memory assetToken,
Token memory underlyingToken,
address account,
uint256 assetAmountExternal
) internal returns (uint256 underlyingAmountExternal) {
// Although the contract should never end with any ETH or underlying token balances, we still do this
// starting and ending check in the case that tokens are accidentally sent to the contract address. They
// will not be sent to some lucky address in a windfall.
uint256 startingBalance = GenericToken.checkBalanceViaSelector(underlyingToken.tokenAddress, address(this), GenericToken.defaultBalanceOfSelector);
uint256 success = CErc20Interface(assetToken.tokenAddress).redeem(assetAmountExternal);
require(success == COMPOUND_RETURN_CODE_NO_ERROR, "Redeem");
uint256 endingBalance = GenericToken.checkBalanceViaSelector(underlyingToken.tokenAddress, address(this), GenericToken.defaultBalanceOfSelector);
underlyingAmountExternal = endingBalance.sub(startingBalance);
// Withdraws the underlying amount out to the destination account
GenericToken.safeTransferOut(underlyingToken.tokenAddress, account, underlyingAmountExternal);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
import "../../../../interfaces/IEIP20NonStandard.sol";
library GenericToken {
bytes4 internal constant defaultBalanceOfSelector = IEIP20NonStandard.balanceOf.selector;
/**
* @dev Manually checks the balance of an account using the method selector. Reduces bytecode size and allows
* for overriding the balanceOf selector to use scaledBalanceOf for aTokens
*/
function checkBalanceViaSelector(
address token,
address account,
bytes4 balanceOfSelector
) internal returns (uint256 balance) {
(bool success, bytes memory returnData) = token.staticcall(abi.encodeWithSelector(balanceOfSelector, account));
require(success);
(balance) = abi.decode(returnData, (uint256));
}
function transferNativeTokenOut(
address account,
uint256 amount
) internal {
// This does not work with contracts, but is reentrancy safe. If contracts want to withdraw underlying
// ETH they will have to withdraw the cETH token and then redeem it manually.
payable(account).transfer(amount);
}
function safeTransferOut(
address token,
address account,
uint256 amount
) internal {
IEIP20NonStandard(token).transfer(account, amount);
checkReturnCode();
}
function safeTransferIn(
address token,
address account,
uint256 amount
) internal {
IEIP20NonStandard(token).transferFrom(account, address(this), amount);
checkReturnCode();
}
function checkReturnCode() internal pure {
bool success;
uint256[1] memory result;
assembly {
switch returndatasize()
case 0 {
// This is a non-standard ERC-20
success := 1 // set success to true
}
case 32 {
// This is a compliant ERC-20
returndatacopy(result, 0, 32)
success := mload(result) // Set `success = returndata` of external call
}
default {
// This is an excessively non-compliant ERC-20, revert.
revert(0, 0)
}
}
require(success, "ERC20");
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal virtual {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
interface IAToken {
/**
* @dev Returns the scaled balance of the user. The scaled balance is the sum of all the
* updated stored balance divided by the reserve's liquidity index at the moment of the update
* @param user The user whose balance is calculated
* @return The scaled balance of the user
**/
function scaledBalanceOf(address user) external view returns (uint256);
function UNDERLYING_ASSET_ADDRESS() external view returns (address);
function symbol() external view returns (string memory);
}
interface IScaledBalanceToken {
/**
* @dev Returns the scaled balance of the user. The scaled balance is the sum of all the
* updated stored balance divided by the reserve's liquidity index at the moment of the update
* @param user The user whose balance is calculated
* @return The scaled balance of the user
**/
function scaledBalanceOf(address user) external view returns (uint256);
/**
* @dev Returns the scaled balance of the user and the scaled total supply.
* @param user The address of the user
* @return The scaled balance of the user
* @return The scaled balance and the scaled total supply
**/
function getScaledUserBalanceAndSupply(address user) external view returns (uint256, uint256);
/**
* @dev Returns the scaled total supply of the variable debt token. Represents sum(debt/index)
* @return The scaled total supply
**/
function scaledTotalSupply() external view returns (uint256);
}
interface IATokenFull is IScaledBalanceToken, IERC20 {
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: BSD-3-Clause
pragma solidity ^0.7.0;
import "./CTokenInterface.sol";
interface CErc20Interface {
/*** User Interface ***/
function mint(uint mintAmount) external returns (uint);
function redeem(uint redeemTokens) external returns (uint);
function redeemUnderlying(uint redeemAmount) external returns (uint);
function borrow(uint borrowAmount) external returns (uint);
function repayBorrow(uint repayAmount) external returns (uint);
function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint);
function liquidateBorrow(address borrower, uint repayAmount, CTokenInterface cTokenCollateral) external returns (uint);
}
// SPDX-License-Identifier: BSD-3-Clause
pragma solidity ^0.7.0;
interface CEtherInterface {
function mint() external payable;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
/**
* @title EIP20NonStandardInterface
* @dev Version of ERC20 with no return values for `transfer` and `transferFrom`
* See https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca
*/
interface IEIP20NonStandard {
/**
* @notice Get the total number of tokens in circulation
* @return The supply of tokens
*/
function totalSupply() external view returns (uint256);
/**
* @notice Gets the balance of the specified address
* @param owner The address from which the balance will be retrieved
* @return balance
*/
function balanceOf(address owner) external view returns (uint256 balance);
///
/// !!!!!!!!!!!!!!
/// !!! NOTICE !!! `transfer` does not return a value, in violation of the ERC-20 specification
/// !!!!!!!!!!!!!!
///
/**
* @notice Transfer `amount` tokens from `msg.sender` to `dst`
* @param dst The address of the destination account
* @param amount The number of tokens to transfer
*/
function transfer(address dst, uint256 amount) external;
///
/// !!!!!!!!!!!!!!
/// !!! NOTICE !!! `transferFrom` does not return a value, in violation of the ERC-20 specification
/// !!!!!!!!!!!!!!
///
/**
* @notice Transfer `amount` tokens from `src` to `dst`
* @param src The address of the source account
* @param dst The address of the destination account
* @param amount The number of tokens to transfer
*/
function transferFrom(address src, address dst, uint256 amount) external;
///
/// !!!!!!!!!!!!!!
/// !!! NOTICE !!! `approve` does not return a value, in violation of the ERC-20 specification
/// !!!!!!!!!!!!!!
///
/**
* @notice Approve `spender` to transfer up to `amount` from `src`
* @dev This will overwrite the approval amount for `spender`
* and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve)
* @param spender The address of the account which may transfer tokens
* @param amount The number of tokens that are approved
*/
function approve(address spender, uint256 amount) external;
/**
* @notice Get the current allowance from `owner` for `spender`
* @param owner The address of the account which owns the tokens to be spent
* @param spender The address of the account which may transfer tokens
* @return remaining The number of tokens allowed to be spent
*/
function allowance(address owner, address spender) external view returns (uint256 remaining);
event Transfer(address indexed from, address indexed to, uint256 amount);
event Approval(address indexed owner, address indexed spender, uint256 amount);
}
// SPDX-License-Identifier: BSD-3-Clause
pragma solidity ^0.7.0;
interface CTokenInterface {
/*** User Interface ***/
function underlying() external view returns (address);
function transfer(address dst, uint amount) external returns (bool);
function transferFrom(address src, address dst, uint amount) external returns (bool);
function approve(address spender, uint amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function balanceOfUnderlying(address owner) external returns (uint);
function getAccountSnapshot(address account) external view returns (uint, uint, uint, uint);
function borrowRatePerBlock() external view returns (uint);
function supplyRatePerBlock() external view returns (uint);
function totalBorrowsCurrent() external returns (uint);
function borrowBalanceCurrent(address account) external returns (uint);
function borrowBalanceStored(address account) external view returns (uint);
function exchangeRateCurrent() external returns (uint);
function exchangeRateStored() external view returns (uint);
function getCash() external view returns (uint);
function accrueInterest() external returns (uint);
function seize(address liquidator, address borrower, uint seizeTokens) external returns (uint);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../global/Types.sol";
import "../global/Constants.sol";
/// @notice Helper methods for bitmaps, they are big-endian and 1-indexed.
library Bitmap {
/// @notice Set a bit on or off in a bitmap, index is 1-indexed
function setBit(
bytes32 bitmap,
uint256 index,
bool setOn
) internal pure returns (bytes32) {
require(index >= 1 && index <= 256); // dev: set bit index bounds
if (setOn) {
return bitmap | (Constants.MSB >> (index - 1));
} else {
return bitmap & ~(Constants.MSB >> (index - 1));
}
}
/// @notice Check if a bit is set
function isBitSet(bytes32 bitmap, uint256 index) internal pure returns (bool) {
require(index >= 1 && index <= 256); // dev: set bit index bounds
return ((bitmap << (index - 1)) & Constants.MSB) == Constants.MSB;
}
/// @notice Count the total bits set
function totalBitsSet(bytes32 bitmap) internal pure returns (uint256) {
uint256 x = uint256(bitmap);
x = (x & 0x5555555555555555555555555555555555555555555555555555555555555555) + (x >> 1 & 0x5555555555555555555555555555555555555555555555555555555555555555);
x = (x & 0x3333333333333333333333333333333333333333333333333333333333333333) + (x >> 2 & 0x3333333333333333333333333333333333333333333333333333333333333333);
x = (x & 0x0707070707070707070707070707070707070707070707070707070707070707) + (x >> 4);
x = (x & 0x000F000F000F000F000F000F000F000F000F000F000F000F000F000F000F000F) + (x >> 8 & 0x000F000F000F000F000F000F000F000F000F000F000F000F000F000F000F000F);
x = x + (x >> 16);
x = x + (x >> 32);
x = x + (x >> 64);
return (x & 0xFF) + (x >> 128 & 0xFF);
}
// Does a binary search over x to get the position of the most significant bit
function getMSB(uint256 x) internal pure returns (uint256 msb) {
// If x == 0 then there is no MSB and this method will return zero. That would
// be the same as the return value when x == 1 (MSB is zero indexed), so instead
// we have this require here to ensure that the values don't get mixed up.
require(x != 0); // dev: get msb zero value
if (x >= 0x100000000000000000000000000000000) {
x >>= 128;
msb += 128;
}
if (x >= 0x10000000000000000) {
x >>= 64;
msb += 64;
}
if (x >= 0x100000000) {
x >>= 32;
msb += 32;
}
if (x >= 0x10000) {
x >>= 16;
msb += 16;
}
if (x >= 0x100) {
x >>= 8;
msb += 8;
}
if (x >= 0x10) {
x >>= 4;
msb += 4;
}
if (x >= 0x4) {
x >>= 2;
msb += 2;
}
if (x >= 0x2) msb += 1; // No need to shift xc anymore
}
/// @dev getMSB returns a zero indexed bit number where zero is the first bit counting
/// from the right (little endian). Asset Bitmaps are counted from the left (big endian)
/// and one indexed.
function getNextBitNum(bytes32 bitmap) internal pure returns (uint256 bitNum) {
// Short circuit the search if bitmap is all zeros
if (bitmap == 0x00) return 0;
return 255 - getMSB(uint256(bitmap)) + 1;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "../balances/TokenHandler.sol";
import "../../math/SafeInt256.sol";
import "../../../interfaces/chainlink/AggregatorV2V3Interface.sol";
library ExchangeRate {
using SafeInt256 for int256;
/// @notice Converts a balance to ETH from a base currency. Buffers or haircuts are
/// always applied in this method.
/// @param er exchange rate object from base to ETH
/// @return the converted balance denominated in ETH with Constants.INTERNAL_TOKEN_PRECISION
function convertToETH(ETHRate memory er, int256 balance) internal pure returns (int256) {
int256 multiplier = balance > 0 ? er.haircut : er.buffer;
// We are converting internal balances here so we know they have INTERNAL_TOKEN_PRECISION decimals
// internalDecimals * rateDecimals * multiplier / (rateDecimals * multiplierDecimals)
// Therefore the result is in ethDecimals
int256 result =
balance.mul(er.rate).mul(multiplier).div(Constants.PERCENTAGE_DECIMALS).div(
er.rateDecimals
);
return result;
}
/// @notice Converts the balance denominated in ETH to the equivalent value in a base currency.
/// Buffers and haircuts ARE NOT applied in this method.
/// @param er exchange rate object from base to ETH
/// @param balance amount (denominated in ETH) to convert
function convertETHTo(ETHRate memory er, int256 balance) internal pure returns (int256) {
// We are converting internal balances here so we know they have INTERNAL_TOKEN_PRECISION decimals
// internalDecimals * rateDecimals / rateDecimals
int256 result = balance.mul(er.rateDecimals).div(er.rate);
return result;
}
/// @notice Calculates the exchange rate between two currencies via ETH. Returns the rate denominated in
/// base exchange rate decimals: (baseRateDecimals * quoteRateDecimals) / quoteRateDecimals
/// @param baseER base exchange rate struct
/// @param quoteER quote exchange rate struct
function exchangeRate(ETHRate memory baseER, ETHRate memory quoteER)
internal
pure
returns (int256)
{
return baseER.rate.mul(quoteER.rateDecimals).div(quoteER.rate);
}
/// @notice Returns an ETHRate object used to calculate free collateral
function buildExchangeRate(uint256 currencyId) internal view returns (ETHRate memory) {
mapping(uint256 => ETHRateStorage) storage store = LibStorage.getExchangeRateStorage();
ETHRateStorage storage ethStorage = store[currencyId];
int256 rateDecimals;
int256 rate;
if (currencyId == Constants.ETH_CURRENCY_ID) {
// ETH rates will just be 1e18, but will still have buffers, haircuts,
// and liquidation discounts
rateDecimals = Constants.ETH_DECIMALS;
rate = Constants.ETH_DECIMALS;
} else {
// prettier-ignore
(
/* roundId */,
rate,
/* uint256 startedAt */,
/* updatedAt */,
/* answeredInRound */
) = ethStorage.rateOracle.latestRoundData();
require(rate > 0, "Invalid rate");
// No overflow, restricted on storage
rateDecimals = int256(10**ethStorage.rateDecimalPlaces);
if (ethStorage.mustInvert) {
rate = rateDecimals.mul(rateDecimals).div(rate);
}
}
return
ETHRate({
rateDecimals: rateDecimals,
rate: rate,
buffer: ethStorage.buffer,
haircut: ethStorage.haircut,
liquidationDiscount: ethStorage.liquidationDiscount
});
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.0;
pragma abicoder v2;
import "./nTokenHandler.sol";
import "../portfolio/BitmapAssetsHandler.sol";
import "../../math/SafeInt256.sol";
import "../../math/Bitmap.sol";
library nTokenCalculations {
using Bitmap for bytes32;
using SafeInt256 for int256;
using AssetRate for AssetRateParameters;
using CashGroup for CashGroupParameters;
/// @notice Returns the nToken present value denominated in asset terms.
function getNTokenAssetPV(nTokenPortfolio memory nToken, uint256 blockTime)
internal
view
returns (int256)
{
int256 totalAssetPV;
int256 totalUnderlyingPV;
{
uint256 nextSettleTime = nTokenHandler.getNextSettleTime(nToken);
// If the first asset maturity has passed (the 3 month), this means that all the LTs must
// be settled except the 6 month (which is now the 3 month). We don't settle LTs except in
// initialize markets so we calculate the cash value of the portfolio here.
if (nextSettleTime <= blockTime) {
// NOTE: this condition should only be present for a very short amount of time, which is the window between
// when the markets are no longer tradable at quarter end and when the new markets have been initialized.
// We time travel back to one second before maturity to value the liquidity tokens. Although this value is
// not strictly correct the different should be quite slight. We do this to ensure that free collateral checks
// for withdraws and liquidations can still be processed. If this condition persists for a long period of time then
// the entire protocol will have serious problems as markets will not be tradable.
blockTime = nextSettleTime - 1;
}
}
// This is the total value in liquid assets
(int256 totalAssetValueInMarkets, /* int256[] memory netfCash */) = getNTokenMarketValue(nToken, blockTime);
// Then get the total value in any idiosyncratic fCash residuals (if they exist)
bytes32 ifCashBits = getNTokenifCashBits(
nToken.tokenAddress,
nToken.cashGroup.currencyId,
nToken.lastInitializedTime,
blockTime,
nToken.cashGroup.maxMarketIndex
);
int256 ifCashResidualUnderlyingPV = 0;
if (ifCashBits != 0) {
// Non idiosyncratic residuals have already been accounted for
(ifCashResidualUnderlyingPV, /* hasDebt */) = BitmapAssetsHandler.getNetPresentValueFromBitmap(
nToken.tokenAddress,
nToken.cashGroup.currencyId,
nToken.lastInitializedTime,
blockTime,
nToken.cashGroup,
false, // nToken present value calculation does not use risk adjusted values
ifCashBits
);
}
// Return the total present value denominated in asset terms
return totalAssetValueInMarkets
.add(nToken.cashGroup.assetRate.convertFromUnderlying(ifCashResidualUnderlyingPV))
.add(nToken.cashBalance);
}
/**
* @notice Handles the case when liquidity tokens should be withdrawn in proportion to their amounts
* in the market. This will be the case when there is no idiosyncratic fCash residuals in the nToken
* portfolio.
* @param nToken portfolio object for nToken
* @param nTokensToRedeem amount of nTokens to redeem
* @param tokensToWithdraw array of liquidity tokens to withdraw from each market, proportional to
* the account's share of the total supply
* @param netfCash an empty array to hold net fCash values calculated later when the tokens are actually
* withdrawn from markets
*/
function _getProportionalLiquidityTokens(
nTokenPortfolio memory nToken,
int256 nTokensToRedeem
) private pure returns (int256[] memory tokensToWithdraw, int256[] memory netfCash) {
uint256 numMarkets = nToken.portfolioState.storedAssets.length;
tokensToWithdraw = new int256[](numMarkets);
netfCash = new int256[](numMarkets);
for (uint256 i = 0; i < numMarkets; i++) {
int256 totalTokens = nToken.portfolioState.storedAssets[i].notional;
tokensToWithdraw[i] = totalTokens.mul(nTokensToRedeem).div(nToken.totalSupply);
}
}
/**
* @notice Returns the number of liquidity tokens to withdraw from each market if the nToken
* has idiosyncratic residuals during nToken redeem. In this case the redeemer will take
* their cash from the rest of the fCash markets, redeeming around the nToken.
* @param nToken portfolio object for nToken
* @param nTokensToRedeem amount of nTokens to redeem
* @param blockTime block time
* @param ifCashBits the bits in the bitmap that represent ifCash assets
* @return tokensToWithdraw array of tokens to withdraw from each corresponding market
* @return netfCash array of netfCash amounts to go back to the account
*/
function getLiquidityTokenWithdraw(
nTokenPortfolio memory nToken,
int256 nTokensToRedeem,
uint256 blockTime,
bytes32 ifCashBits
) internal view returns (int256[] memory, int256[] memory) {
// If there are no ifCash bits set then this will just return the proportion of all liquidity tokens
if (ifCashBits == 0) return _getProportionalLiquidityTokens(nToken, nTokensToRedeem);
(
int256 totalAssetValueInMarkets,
int256[] memory netfCash
) = getNTokenMarketValue(nToken, blockTime);
int256[] memory tokensToWithdraw = new int256[](netfCash.length);
// NOTE: this total portfolio asset value does not include any cash balance the nToken may hold.
// The redeemer will always get a proportional share of this cash balance and therefore we don't
// need to account for it here when we calculate the share of liquidity tokens to withdraw. We are
// only concerned with the nToken's portfolio assets in this method.
int256 totalPortfolioAssetValue;
{
// Returns the risk adjusted net present value for the idiosyncratic residuals
(int256 underlyingPV, /* hasDebt */) = BitmapAssetsHandler.getNetPresentValueFromBitmap(
nToken.tokenAddress,
nToken.cashGroup.currencyId,
nToken.lastInitializedTime,
blockTime,
nToken.cashGroup,
true, // use risk adjusted here to assess a penalty for withdrawing around the residual
ifCashBits
);
// NOTE: we do not include cash balance here because the account will always take their share
// of the cash balance regardless of the residuals
totalPortfolioAssetValue = totalAssetValueInMarkets.add(
nToken.cashGroup.assetRate.convertFromUnderlying(underlyingPV)
);
}
// Loops through each liquidity token and calculates how much the redeemer can withdraw to get
// the requisite amount of present value after adjusting for the ifCash residual value that is
// not accessible via redemption.
for (uint256 i = 0; i < tokensToWithdraw.length; i++) {
int256 totalTokens = nToken.portfolioState.storedAssets[i].notional;
// Redeemer's baseline share of the liquidity tokens based on total supply:
// redeemerShare = totalTokens * nTokensToRedeem / totalSupply
// Scalar factor to account for residual value (need to inflate the tokens to withdraw
// proportional to the value locked up in ifCash residuals):
// scaleFactor = totalPortfolioAssetValue / totalAssetValueInMarkets
// Final math equals:
// tokensToWithdraw = redeemerShare * scalarFactor
// tokensToWithdraw = (totalTokens * nTokensToRedeem * totalPortfolioAssetValue)
// / (totalAssetValueInMarkets * totalSupply)
tokensToWithdraw[i] = totalTokens
.mul(nTokensToRedeem)
.mul(totalPortfolioAssetValue);
tokensToWithdraw[i] = tokensToWithdraw[i]
.div(totalAssetValueInMarkets)
.div(nToken.totalSupply);
// This is the share of net fcash that will be credited back to the account
netfCash[i] = netfCash[i].mul(tokensToWithdraw[i]).div(totalTokens);
}
return (tokensToWithdraw, netfCash);
}
/// @notice Returns the value of all the liquid assets in an nToken portfolio which are defined by
/// the liquidity tokens held in each market and their corresponding fCash positions. The formula
/// can be described as:
/// totalAssetValue = sum_per_liquidity_token(cashClaim + presentValue(netfCash))
/// where netfCash = fCashClaim + fCash
/// and fCash refers the the fCash position at the corresponding maturity
function getNTokenMarketValue(nTokenPortfolio memory nToken, uint256 blockTime)
internal
view
returns (int256 totalAssetValue, int256[] memory netfCash)
{
uint256 numMarkets = nToken.portfolioState.storedAssets.length;
netfCash = new int256[](numMarkets);
MarketParameters memory market;
for (uint256 i = 0; i < numMarkets; i++) {
// Load the corresponding market into memory
nToken.cashGroup.loadMarket(market, i + 1, true, blockTime);
PortfolioAsset memory liquidityToken = nToken.portfolioState.storedAssets[i];
uint256 maturity = liquidityToken.maturity;
// Get the fCash claims and fCash assets. We do not use haircut versions here because
// nTokenRedeem does not require it and getNTokenPV does not use it (a haircut is applied
// at the end of the calculation to the entire PV instead).
(int256 assetCashClaim, int256 fCashClaim) = AssetHandler.getCashClaims(liquidityToken, market);
// fCash is denominated in underlying
netfCash[i] = fCashClaim.add(
BitmapAssetsHandler.getifCashNotional(
nToken.tokenAddress,
nToken.cashGroup.currencyId,
maturity
)
);
// This calculates for a single liquidity token:
// assetCashClaim + convertToAssetCash(pv(netfCash))
int256 netAssetValueInMarket = assetCashClaim.add(
nToken.cashGroup.assetRate.convertFromUnderlying(
AssetHandler.getPresentfCashValue(
netfCash[i],
maturity,
blockTime,
// No need to call cash group for oracle rate, it is up to date here
// and we are assured to be referring to this market.
market.oracleRate
)
)
);
// Calculate the running total
totalAssetValue = totalAssetValue.add(netAssetValueInMarket);
}
}
/// @notice Returns just the bits in a bitmap that are idiosyncratic
function getNTokenifCashBits(
address tokenAddress,
uint256 currencyId,
uint256 lastInitializedTime,
uint256 blockTime,
uint256 maxMarketIndex
) internal view returns (bytes32) {
// If max market index is less than or equal to 2, there are never ifCash assets by construction
if (maxMarketIndex <= 2) return bytes32(0);
bytes32 assetsBitmap = BitmapAssetsHandler.getAssetsBitmap(tokenAddress, currencyId);
// Handles the case when there are no assets at the first initialization
if (assetsBitmap == 0) return assetsBitmap;
uint256 tRef = DateTime.getReferenceTime(blockTime);
if (tRef == lastInitializedTime) {
// This is a more efficient way to turn off ifCash assets in the common case when the market is
// initialized immediately
return assetsBitmap & ~(Constants.ACTIVE_MARKETS_MASK);
} else {
// In this branch, initialize markets has occurred past the time above. It would occur in these
// two scenarios (both should be exceedingly rare):
// 1. initializing a cash group with 3+ markets for the first time (not beginning on the tRef)
// 2. somehow initialize markets has been delayed for more than 24 hours
for (uint i = 1; i <= maxMarketIndex; i++) {
// In this loop we get the maturity of each active market and turn off the corresponding bit
// one by one. It is less efficient than the option above.
uint256 maturity = tRef + DateTime.getTradedMarket(i);
(uint256 bitNum, /* */) = DateTime.getBitNumFromMaturity(lastInitializedTime, maturity);
assetsBitmap = assetsBitmap.setBit(bitNum, false);
}
return assetsBitmap;
}
}
} | @notice Used as a wrapper for tokens that are interest bearing for an underlying token. Follows the cToken interface, however, can be adapted for other interest bearing tokens. | interface AssetRateAdapter {
function token() external view returns (address);
function decimals() external view returns (uint8);
function description() external view returns (string memory);
function version() external view returns (uint256);
function underlying() external view returns (address);
function getExchangeRateStateful() external returns (int256);
function getExchangeRateView() external view returns (int256);
function getAnnualizedSupplyRate() external view returns (uint256);
pragma solidity >=0.7.0;
}
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./partial_match/1/0x4E7B20bd41d54D46974A199aA09C7534e0716796/sources/GTK.sol | * @dev Sets {decimals} to a value other than the default one of 18. Requirements: - this function can only be called from a constructor./ | function _setupDecimals(uint8 decimals_) internal {
require(!address(this).isContract(), "ERC20: decimals cannot be changed after construction");
_decimals = decimals_;
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/**
*Submitted for verification at Etherscan.io on 2021-04-24
*/
// SPDX-License-Identifier: UNLICENSED
// Copyright (c) 2021 0xdev0 - All rights reserved
// https://twitter.com/0xdev0
pragma solidity ^0.8.0;
interface IERC20 {
function initialize() external;
function totalSupply() external view returns (uint);
function balanceOf(address account) external view returns (uint);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint);
function symbol() external view returns (string memory);
function decimals() external view returns (uint);
function approve(address spender, uint amount) external returns (bool);
function mint(address account, uint amount) external;
function burn(address account, uint amount) external;
function transferFrom(address sender, address recipient, uint amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
interface ILendingPair {
function checkAccountHealth(address _account) external view;
function totalDebt(address _token) external view returns(uint);
function lpToken(address _token) external view returns(IERC20);
function debtOf(address _account, address _token) external view returns(uint);
function deposit(address _token, uint _amount) external;
function withdraw(address _token, uint _amount) external;
function borrow(address _token, uint _amount) external;
function repay(address _token, uint _amount) external;
function withdrawRepay(address _token, uint _amount) external;
function withdrawBorrow(address _token, uint _amount) external;
function controller() external view returns(IController);
function swapTokenToToken(
address _fromToken,
address _toToken,
address _recipient,
uint _inputAmount,
uint _minOutput,
uint _deadline
) external returns(uint);
}
interface ILendingPairCallee {
function flashSwapCall(address _recipient, uint _amountA, uint _amountB, bytes calldata _data) external;
}
interface IController {
function interestRateModel() external view returns(IInterestRateModel);
function feeRecipient() external view returns(address);
function priceDelay() external view returns(uint);
function slowPricePeriod() external view returns(uint);
function slowPriceRange() external view returns(uint);
function liqMinHealth() external view returns(uint);
function liqFeePool() external view returns(uint);
function liqFeeSystem() external view returns(uint);
function liqFeeCaller() external view returns(uint);
function liqFeesTotal() external view returns(uint);
function depositLimit(address _lendingPair, address _token) external view returns(uint);
}
interface IInterestRateModel {
function systemRate(ILendingPair _pair) external view returns(uint);
function supplyRate(ILendingPair _pair, address _token) external view returns(uint);
function borrowRate(ILendingPair _pair, address _token) external view returns(uint);
}
contract ReentrancyGuard {
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () {
_status = _NOT_ENTERED;
}
modifier nonReentrant() {
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
_status = _ENTERED;
_;
_status = _NOT_ENTERED;
}
}
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
owner = msg.sender;
emit OwnershipTransferred(address(0), owner);
}
modifier onlyOwner() {
require(isOwner(), "Ownable: caller is not the owner");
_;
}
function isOwner() public view returns (bool) {
return msg.sender == owner;
}
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(owner, address(0));
owner = address(0);
}
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
library Clones {
/**
* @dev Deploys and returns the address of a clone that mimics the behaviour of `master`.
*
* This function uses the create opcode, which should never revert.
*/
function clone(address master) internal returns (address instance) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, master))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
instance := create(0, ptr, 0x37)
}
require(instance != address(0), "ERC1167: create failed");
}
/**
* @dev Deploys and returns the address of a clone that mimics the behaviour of `master`.
*
* This function uses the create2 opcode and a `salt` to deterministically deploy
* the clone. Using the same `master` and `salt` multiple time will revert, since
* the clones cannot be deployed twice at the same address.
*/
function cloneDeterministic(address master, bytes32 salt) internal returns (address instance) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, master))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
instance := create2(0, ptr, 0x37, salt)
}
require(instance != address(0), "ERC1167: create2 failed");
}
/**
* @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
*/
function predictDeterministicAddress(address master, bytes32 salt, address deployer) internal pure returns (address predicted) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, master))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf3ff00000000000000000000000000000000)
mstore(add(ptr, 0x38), shl(0x60, deployer))
mstore(add(ptr, 0x4c), salt)
mstore(add(ptr, 0x6c), keccak256(ptr, 0x37))
predicted := keccak256(add(ptr, 0x37), 0x55)
}
}
/**
* @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
*/
function predictDeterministicAddress(address master, bytes32 salt) internal view returns (address predicted) {
return predictDeterministicAddress(master, salt, address(this));
}
}
contract ERC20 is Ownable {
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
string public name;
string public symbol;
uint8 public decimals;
uint public totalSupply;
constructor(
string memory _name,
string memory _symbol,
uint8 _decimals
) {
name = _name;
symbol = _symbol;
decimals = _decimals;
require(decimals > 0, "decimals");
}
function transfer(address _recipient, uint _amount) public returns (bool) {
_transfer(msg.sender, _recipient, _amount);
return true;
}
function approve(address _spender, uint _amount) public returns (bool) {
_approve(msg.sender, _spender, _amount);
return true;
}
function transferFrom(address _sender, address _recipient, uint _amount) public returns (bool) {
require(allowance[_sender][msg.sender] >= _amount, "ERC20: insufficient approval");
_transfer(_sender, _recipient, _amount);
_approve(_sender, msg.sender, allowance[_sender][msg.sender] - _amount);
return true;
}
function _transfer(address _sender, address _recipient, uint _amount) internal {
require(_sender != address(0), "ERC20: transfer from the zero address");
require(_recipient != address(0), "ERC20: transfer to the zero address");
require(balanceOf[_sender] >= _amount, "ERC20: insufficient funds");
balanceOf[_sender] -= _amount;
balanceOf[_recipient] += _amount;
emit Transfer(_sender, _recipient, _amount);
}
function mint(address _account, uint _amount) public onlyOwner {
_mint(_account, _amount);
}
function burn(address _account, uint _amount) public onlyOwner {
_burn(_account, _amount);
}
function _mint(address _account, uint _amount) internal {
require(_account != address(0), "ERC20: mint to the zero address");
totalSupply += _amount;
balanceOf[_account] += _amount;
emit Transfer(address(0), _account, _amount);
}
function _burn(address _account, uint _amount) internal {
require(_account != address(0), "ERC20: burn from the zero address");
balanceOf[_account] -= _amount;
totalSupply -= _amount;
emit Transfer(_account, address(0), _amount);
}
function _approve(address _owner, address _spender, uint _amount) internal {
require(_owner != address(0), "ERC20: approve from the zero address");
require(_spender != address(0), "ERC20: approve to the zero address");
allowance[_owner][_spender] = _amount;
emit Approval(_owner, _spender, _amount);
}
}
interface IWETH {
function deposit() external payable;
function withdraw(uint wad) external;
function balanceOf(address account) external view returns (uint);
function transfer(address recipient, uint amount) external returns (bool);
function approve(address spender, uint amount) external returns (bool);
}
contract TransferHelper {
// Mainnet
IWETH internal constant WETH = IWETH(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
// Ropsten
// IWETH internal constant WETH = IWETH(0xc778417E063141139Fce010982780140Aa0cD5Ab);
function _safeTransferFrom(address _token, address _sender, uint _amount) internal returns(uint) {
IERC20(_token).transferFrom(_sender, address(this), _amount);
require(_amount > 0, "TransferHelper: amount must be > 0");
}
function _wethWithdrawTo(address _to, uint _amount) internal {
require(_amount > 0, "TransferHelper: amount must be > 0");
WETH.withdraw(_amount);
(bool success, ) = _to.call { value: _amount }(new bytes(0));
require(success, 'TransferHelper: ETH transfer failed');
}
}
contract LendingPair is ReentrancyGuard, TransferHelper {
// Prevents division by zero and other nasty stuff
uint public constant MIN_RESERVE = 1000;
using Address for address;
using Clones for address;
mapping (address => mapping (address => uint)) public debtOf;
mapping (address => mapping (address => uint)) public accountInterestSnapshot;
mapping (address => uint) public cumulativeInterestRate; // 1e18 = 1%
mapping (address => uint) public totalDebt;
mapping (address => uint) public storedSwapReserve;
mapping (address => uint) public swapTime;
mapping (address => uint) public storedLendingReserve;
mapping (address => uint) public lendingTime;
mapping (address => IERC20) public lpToken;
IController public controller;
address public tokenA;
address public tokenB;
uint public lastTimeAccrued;
event Swap(
address indexed fromToken,
address indexed toToken,
address indexed recipient,
uint inputAmount,
uint outputAmount
);
event FlashSwap(
address indexed recipient,
uint amountA,
uint amountB
);
event Liquidation(
address indexed account,
uint supplyBurnA,
uint supplyBurnB,
uint borrowBurnA,
uint borrowBurnB
);
event Deposit(address indexed token, uint amount);
event Withdraw(address indexed token, uint amount);
event Borrow(address indexed token, uint amount);
event Repay(address indexed token, uint amount);
receive() external payable {}
function initialize(
address _lpTokenMaster,
address _controller,
IERC20 _tokenA,
IERC20 _tokenB
) public {
require(address(tokenA) == address(0), "LendingPair: already initialized");
require(address(_tokenA) != address(0) && address(_tokenB) != address(0), "LendingPair: cannot be ZERO address");
controller = IController(_controller);
tokenA = address(_tokenA);
tokenB = address(_tokenB);
lastTimeAccrued = block.timestamp;
cumulativeInterestRate[tokenA] = 1e18;
cumulativeInterestRate[tokenB] = 1e18;
lpToken[tokenA] = _createLpToken(_lpTokenMaster);
lpToken[tokenB] = _createLpToken(_lpTokenMaster);
}
function depositRepay(address _token, uint _amount) public {
_depositRepay(_token, _amount);
IERC20(_token).transferFrom(msg.sender, address(this), _amount);
}
function depositRepayETH() public payable {
_depositRepay(address(WETH), msg.value);
WETH.deposit { value: msg.value }();
}
function withdrawBorrow(address _token, uint _amount) public {
_withdrawBorrow(_token, _amount);
_safeTransfer(IERC20(_token), msg.sender, _amount);
}
function withdrawBorrowETH(uint _amount) public {
_withdrawBorrow(address(WETH), _amount);
_wethWithdrawTo(msg.sender, _amount);
_checkMinReserve(IERC20(address(WETH)));
}
function deposit(address _token, uint _amount) public {
accrueAccount(msg.sender);
_deposit(_token, _amount);
_safeTransferFrom(_token, msg.sender, _amount);
}
function withdrawAll(address _token) public {
accrueAccount(msg.sender);
uint amount = lpToken[address(_token)].balanceOf(msg.sender);
_withdraw(_token, amount);
_safeTransfer(IERC20(_token), msg.sender, amount);
}
function withdraw(address _token, uint _amount) public {
accrueAccount(msg.sender);
_withdraw(_token, _amount);
_safeTransfer(IERC20(_token), msg.sender, _amount);
}
function borrow(address _token, uint _amount) public {
accrueAccount(msg.sender);
_borrow(_token, _amount);
_safeTransfer(IERC20(_token), msg.sender, _amount);
}
function repayAll(address _token) public {
accrueAccount(msg.sender);
uint amount = debtOf[_token][msg.sender];
_repay(_token, amount);
_safeTransferFrom(_token, msg.sender, amount);
}
function repay(address _token, uint _amount) public {
accrueAccount(msg.sender);
_repay(_token, _amount);
_safeTransferFrom(_token, msg.sender, _amount);
}
function flashSwap(
address _recipient,
uint _amountA,
uint _amountB,
bytes calldata _data
) public nonReentrant {
_delayLendingPrice(tokenA);
_delayLendingPrice(tokenB);
require(_amountA > 0 || _amountB > 0, 'LendingPair: insufficient input amounts');
uint balanceA = IERC20(tokenA).balanceOf(address(this));
uint balanceB = IERC20(tokenB).balanceOf(address(this));
if (_amountA > 0) _safeTransfer(IERC20(tokenA), _recipient, _amountA);
if (_amountB > 0) _safeTransfer(IERC20(tokenB), _recipient, _amountB);
ILendingPairCallee(_recipient).flashSwapCall(msg.sender, _amountA, _amountB, _data);
uint adjustedBalanceA = balanceA + _amountA * 3 / 1000;
uint adjustedBalanceB = balanceB + _amountB * 3 / 1000;
uint expectedK = adjustedBalanceA * adjustedBalanceB;
_earnSwapInterest(tokenA, _amountA);
_earnSwapInterest(tokenB, _amountB);
require(_k() >= expectedK, "LendingPair: insufficient return amount");
emit FlashSwap(_recipient, _amountA, _amountB);
}
function swapETHToToken(
address _toToken,
address _recipient,
uint _minOutput,
uint _deadline
) public payable nonReentrant returns(uint) {
uint outputAmount = _swap(address(WETH), _toToken, _recipient, msg.value, _minOutput, _deadline);
WETH.deposit { value: msg.value }();
_safeTransfer(IERC20(_toToken), _recipient, outputAmount);
return outputAmount;
}
function swapTokenToETH(
address _fromToken,
address _recipient,
uint _inputAmount,
uint _minOutput,
uint _deadline
) public nonReentrant returns(uint) {
uint outputAmount = _swap(_fromToken, address(WETH), _recipient, _inputAmount, _minOutput, _deadline);
_safeTransferFrom(_fromToken, msg.sender, _inputAmount);
_wethWithdrawTo(_recipient, outputAmount);
_checkMinReserve(IERC20(address(WETH)));
return outputAmount;
}
function swapTokenToToken(
address _fromToken,
address _toToken,
address _recipient,
uint _inputAmount,
uint _minOutput,
uint _deadline
) public nonReentrant returns(uint) {
uint outputAmount = _swap(_fromToken, _toToken, _recipient, _inputAmount, _minOutput, _deadline);
_safeTransferFrom(_fromToken, msg.sender, _inputAmount);
_safeTransfer(IERC20(_toToken), _recipient, outputAmount);
return outputAmount;
}
function accrue() public {
_accrueInterest(tokenA);
_accrueInterest(tokenB);
lastTimeAccrued = block.timestamp;
}
function accrueAccount(address _account) public {
accrue();
_accrueAccount(_account);
}
function accountHealth(address _account) public view returns(uint) {
uint totalAccountSupply = supplyBalance(_account, tokenA, tokenA) + supplyBalance(_account, tokenB, tokenA);
uint totalAccountBorrrow = borrowBalance(_account, tokenA, tokenA) + borrowBalance(_account, tokenB, tokenA);
if (totalAccountBorrrow == 0) {
return controller.liqMinHealth();
} else {
return totalAccountSupply * 1e18 / totalAccountBorrrow;
}
}
// Get borow balance converted to the units of _returnToken
function borrowBalance(
address _account,
address _borrowedToken,
address _returnToken
) public view returns(uint) {
return convertTokenValues(_borrowedToken, _returnToken, debtOf[_borrowedToken][_account]);
}
// Get supply balance converted to the units of _returnToken
function supplyBalance(
address _account,
address _suppliedToken,
address _returnToken
) public view returns(uint) {
return convertTokenValues(_suppliedToken, _returnToken, lpToken[_suppliedToken].balanceOf(_account));
}
// Get the value of _fromToken in the units of _toToken without slippage or fees
function convertTokenValues(
address _fromToken,
address _toToken,
uint _inputAmount
) public view returns(uint) {
uint inputReserve = lendingReserve(_fromToken);
uint outputReserve = lendingReserve(_toToken);
require(inputReserve > 0 && outputReserve > 0, "LendingPair: invalid reserve balances");
return _inputAmount * 1e18 * outputReserve / inputReserve / 1e18;
}
function getExpectedOutput(
address _fromToken,
address _toToken,
uint _inputAmount
) public view returns(uint) {
uint inputReserve = swapReserve(_fromToken);
uint outputReserve = swapReserve(_toToken);
require(inputReserve > 0 && outputReserve > 0, "LendingPair: invalid reserve balances");
uint inputAmountWithFee = _inputAmount * 997;
uint numerator = inputAmountWithFee * outputReserve;
uint denominator = inputReserve * 1000 + inputAmountWithFee;
uint output = numerator / denominator;
uint maxOutput = IERC20(_toToken).balanceOf(address(this)) - MIN_RESERVE;
return output > maxOutput ? maxOutput : output;
}
function supplyRate(address _token) public view returns(uint) {
return controller.interestRateModel().supplyRate(ILendingPair(address(this)), _token);
}
function borrowRate(address _token) public view returns(uint) {
return controller.interestRateModel().borrowRate(ILendingPair(address(this)), _token);
}
// Sell collateral to reduce debt and increase accountHealth
function liquidateAccount(address _account) public {
uint health = accountHealth(_account);
require(health < controller.liqMinHealth(), "LendingPair: account health > liqMinHealth");
(uint supplyBurnA, uint borrowBurnA) = _liquidateToken(_account, tokenA, tokenB);
(uint supplyBurnB, uint borrowBurnB) = _liquidateToken(_account, tokenB, tokenA);
emit Liquidation(_account, supplyBurnA, supplyBurnB, borrowBurnA, borrowBurnB);
}
function pendingSupplyInterest(address _token, address _account) public view returns(uint) {
return _newInterest(lpToken[_token].balanceOf(_account), _token, _account);
}
function pendingBorrowInterest(address _token, address _account) public view returns(uint) {
return _newInterest(debtOf[_token][_account], _token, _account);
}
// Used to calculate swap price
function swapReserve(address _token) public view returns(uint) {
return _reserve(_token, storedSwapReserve[_token], swapTime[_token]);
}
// Used to calculate liquidation price
function lendingReserve(address _token) public view returns(uint) {
return _reserve(_token, storedLendingReserve[_token], lendingTime[_token]);
}
function feeRecipient() public view returns(address) {
return controller.feeRecipient();
}
function checkAccountHealth(address _account) public view {
uint health = accountHealth(_account);
require(health >= controller.liqMinHealth(), "LendingPair: insufficient accountHealth");
}
function _reserve(address _token, uint _storedReserve, uint _vTime) internal view returns(uint) {
uint realReserve = IERC20(_token).balanceOf(address(this));
if (block.timestamp > (_vTime + controller.priceDelay())) { return realReserve; }
uint timeElapsed = block.timestamp - _vTime;
int diffAmount = (int(realReserve) - int(_storedReserve)) * int(_timeShare(timeElapsed)) / int(1e18);
return uint(int(_storedReserve) + diffAmount);
}
function _swap(
address _fromToken,
address _toToken,
address _recipient,
uint _inputAmount,
uint _minOutput,
uint _deadline
) internal returns(uint) {
_validateToken(_fromToken);
_validateToken(_toToken);
_delayLendingPrice(_fromToken);
_delayLendingPrice(_toToken);
uint outputReserve = IERC20(_toToken).balanceOf(address(this));
uint outputAmount = getExpectedOutput(_fromToken, _toToken, _inputAmount);
require(_deadline >= block.timestamp, "LendingPair: _deadline <= block.timestamp");
require(outputAmount >= _minOutput, "LendingPair: outputAmount >= _minOutput");
require(outputAmount <= outputReserve, "LendingPair: insufficient reserves");
_earnSwapInterest(_toToken, outputAmount);
emit Swap(_fromToken, _toToken, _recipient, _inputAmount, outputAmount);
return outputAmount;
}
function _depositRepay(address _token, uint _amount) internal {
accrueAccount(msg.sender);
uint debt = debtOf[_token][msg.sender];
uint repayAmount = debt > _amount ? _amount : debt;
if (repayAmount > 0) {
_repay(_token, repayAmount);
}
uint depositAmount = _amount - repayAmount;
if (depositAmount > 0) {
_deposit(_token, depositAmount);
}
}
function _withdrawBorrow(address _token, uint _amount) internal {
accrueAccount(msg.sender);
uint supplyAmount = lpToken[_token].balanceOf(msg.sender);
uint withdrawAmount = supplyAmount > _amount ? _amount : supplyAmount;
if (withdrawAmount > 0) {
_withdraw(_token, withdrawAmount);
}
uint borrowAmount = _amount - withdrawAmount;
if (borrowAmount > 0) {
_borrow(_token, borrowAmount);
}
}
function _earnSwapInterest(address _token, uint _amount) internal {
uint earnedAmount = _amount * 3 / 1000;
uint newInterest = earnedAmount * 1e18 / lpToken[_token].totalSupply();
cumulativeInterestRate[_token] += newInterest;
}
function _mintDebt(address _token, address _account, uint _amount) internal {
debtOf[_token][_account] += _amount;
totalDebt[_token] += _amount;
}
function _burnDebt(address _token, address _account, uint _amount) internal {
debtOf[_token][_account] -= _amount;
totalDebt[_token] -= _amount;
}
function _delaySwapPrice(address _token) internal {
storedSwapReserve[_token] = swapReserve(_token);
swapTime[_token] = block.timestamp;
}
function _delayLendingPrice(address _token) internal {
storedLendingReserve[_token] = lendingReserve(_token);
lendingTime[_token] = block.timestamp;
}
function _liquidateToken(
address _account,
address _supplyToken,
address _borrowToken
) internal returns(uint, uint) {
uint accountSupply = lpToken[_supplyToken].balanceOf(_account);
uint accountDebt = debtOf[_borrowToken][_account];
uint supplyDebt = convertTokenValues(_borrowToken, _supplyToken, accountDebt);
uint supplyRequired = supplyDebt + supplyDebt * controller.liqFeesTotal() / 100e18;
uint supplyBurn = supplyRequired > accountSupply ? accountSupply : supplyRequired;
uint supplyBurnMinusFees = (supplyBurn * 100e18 / (100e18 + controller.liqFeesTotal()));
uint systemFee = supplyBurnMinusFees * controller.liqFeeSystem() / 100e18;
uint callerFee = supplyBurnMinusFees * controller.liqFeeCaller() / 100e18;
lpToken[_supplyToken].burn(_account, supplyBurn);
lpToken[_supplyToken].mint(feeRecipient(), systemFee);
lpToken[_supplyToken].mint(msg.sender, callerFee);
uint debtBurn = convertTokenValues(_supplyToken, _borrowToken, supplyBurnMinusFees);
// Remove dust debt to allow full debt wipe
if (debtBurn < accountDebt) {
debtBurn = (accountDebt - debtBurn) < accountDebt / 10000 ? accountDebt : debtBurn;
}
_burnDebt(_borrowToken, _account, debtBurn);
return (supplyBurn, debtBurn);
}
function _accrueAccount(address _account) internal {
_accrueAccountSupply(tokenA, _account);
_accrueAccountSupply(tokenB, _account);
_accrueAccountDebt(tokenA, _account);
_accrueAccountDebt(tokenB, _account);
accountInterestSnapshot[tokenA][_account] = cumulativeInterestRate[tokenA];
accountInterestSnapshot[tokenB][_account] = cumulativeInterestRate[tokenB];
_accrueSystem(tokenA);
_accrueSystem(tokenB);
}
// Accrue system interest from the total debt
// Cannot use total supply since nobody may be supplying to that side (borrowing sold assets from another side)
function _accrueSystem(address _token) internal {
_ensureAccountInterestSnapshot(feeRecipient());
uint systemInterest = _newInterest(totalDebt[_token], _token, feeRecipient());
uint newSupply = systemInterest * _systemRate() / 100e18;
lpToken[_token].mint(feeRecipient(), newSupply);
}
function _ensureAccountInterestSnapshot(address _account) internal {
if (accountInterestSnapshot[tokenA][_account] == 0) {
accountInterestSnapshot[tokenA][_account] = cumulativeInterestRate[tokenA];
}
if (accountInterestSnapshot[tokenB][_account] == 0) {
accountInterestSnapshot[tokenB][_account] = cumulativeInterestRate[tokenB];
}
}
function _accrueAccountSupply(address _token, address _account) internal {
uint supplyInterest = pendingSupplyInterest(_token, _account);
uint newSupply = supplyInterest * _systemRate() / 100e18;
lpToken[_token].mint(_account, newSupply);
}
function _accrueAccountDebt(address _token, address _account) internal {
uint newDebt = pendingBorrowInterest(_token, _account);
_mintDebt(_token, _account, newDebt);
}
function _withdraw(address _token, uint _amount) internal {
_validateToken(_token);
_delaySwapPrice(_token);
_delayLendingPrice(_token);
lpToken[address(_token)].burn(msg.sender, _amount);
checkAccountHealth(msg.sender);
emit Withdraw(_token, _amount);
}
function _borrow(address _token, uint _amount) internal {
_validateToken(_token);
_delaySwapPrice(_token);
_delayLendingPrice(_token);
require(lpToken[address(_token)].balanceOf(msg.sender) == 0, "LendingPair: cannot borrow supplied token");
_mintDebt(_token, msg.sender, _amount);
checkAccountHealth(msg.sender);
emit Borrow(_token, _amount);
}
function _repay(address _token, uint _amount) internal {
_validateToken(_token);
_delaySwapPrice(_token);
_delayLendingPrice(_token);
_burnDebt(_token, msg.sender, _amount);
emit Repay(_token, _amount);
}
function _deposit(address _token, uint _amount) internal {
_checkDepositLimit(_token, _amount);
// Initialize on first deposit (pair creation).
_initOrDelaySwapPrice(_token, _amount);
_initOrDelayLendingPrice(_token, _amount);
// Deposit is required to withdraw, borrow & repay so we only need to check this here.
_ensureAccountInterestSnapshot(msg.sender);
_validateToken(_token);
require(debtOf[_token][msg.sender] == 0, "LendingPair: cannot deposit borrowed token");
lpToken[address(_token)].mint(msg.sender, _amount);
emit Deposit(_token, _amount);
}
function _accrueInterest(address _token) internal {
uint timeElapsed = block.timestamp - lastTimeAccrued;
uint newInterest = borrowRate(_token) / 365 days * timeElapsed;
cumulativeInterestRate[_token] += newInterest;
}
function _initOrDelaySwapPrice(address _token, uint _amount) internal {
if (storedSwapReserve[_token] == 0) {
storedSwapReserve[_token] = _amount;
swapTime[_token] = block.timestamp - controller.priceDelay();
} else {
_delaySwapPrice(_token);
}
}
function _initOrDelayLendingPrice(address _token, uint _amount) internal {
if (storedLendingReserve[_token] == 0) {
storedLendingReserve[_token] = _amount;
lendingTime[_token] = block.timestamp - controller.priceDelay();
} else {
_delayLendingPrice(_token);
}
}
function _createLpToken(address _lpTokenMaster) internal returns(IERC20) {
IERC20 newLPToken = IERC20(_lpTokenMaster.clone());
newLPToken.initialize();
return newLPToken;
}
function _timeShare(uint _timeElapsed) internal view returns(uint) {
if (_timeElapsed > controller.slowPricePeriod()) {
return _timeElapsed * 1e18 / controller.priceDelay();
} else {
return _timeElapsed * 1e18 / controller.slowPricePeriod() * controller.slowPriceRange() / 100e18;
}
}
function _validateToken(address _token) internal view {
require(_token == tokenA || _token == tokenB, "LendingPair: invalid token");
}
function _safeTransfer(IERC20 _token, address _recipient, uint _amount) internal {
_token.transfer(_recipient, _amount);
_checkMinReserve(_token);
}
function _checkMinReserve(IERC20 _token) internal view {
require(_token.balanceOf(address(this)) >= MIN_RESERVE, "LendingPair: below MIN_RESERVE");
}
function _k() internal view returns(uint) {
uint balanceA = IERC20(tokenA).balanceOf(address(this));
uint balanceB = IERC20(tokenB).balanceOf(address(this));
return balanceA * balanceB;
}
function _checkDepositLimit(address _token, uint _amount) internal view {
uint depositLimit = controller.depositLimit(address(this), _token);
if (depositLimit > 0) {
require((lpToken[_token].totalSupply() + _amount) <= depositLimit, "LendingPair: deposit limit reached");
}
}
function _systemRate() internal view returns(uint) {
return controller.interestRateModel().systemRate(ILendingPair(address(this)));
}
function _newInterest(uint _balance, address _token, address _account) internal view returns(uint) {
return _balance * (cumulativeInterestRate[_token] - accountInterestSnapshot[_token][_account]) / 1e18;
}
}
contract InterestRateModel {
uint private constant MIN_RATE = 1e17; // 0.1%
uint private constant LOW_RATE = 20e18; // 20%
uint private constant HIGH_RATE = 1000e18; // 1,000%
uint private constant TARGET_UTILIZATION = 80e18; // 80%
uint public constant SYSTEM_RATE = 50e18; // 50% - share of borrowRate earned by the system
function supplyRate(ILendingPair _pair, address _token) public view returns(uint) {
return borrowRate(_pair, _token) * SYSTEM_RATE / 100e18;
}
function borrowRate(ILendingPair _pair, address _token) public view returns(uint) {
uint debt = _pair.totalDebt(_token);
uint supply = IERC20(_pair.lpToken(_token)).totalSupply();
if (supply == 0 || debt == 0) { return MIN_RATE; }
uint utilization = _max(debt * 100e18 / supply, 100e18);
if (utilization < TARGET_UTILIZATION) {
uint rate = LOW_RATE * utilization / 100e18;
return (rate < MIN_RATE) ? MIN_RATE : rate;
} else {
// (999 - (1000 * 0.8)) / (1000 * 0.2)
utilization = 100e18 * ( debt - (supply * TARGET_UTILIZATION / 100e18) ) / (supply * (100e18 - TARGET_UTILIZATION) / 100e18);
utilization = _max(utilization, 100e18);
return LOW_RATE + (HIGH_RATE - LOW_RATE) * utilization / 100e18;
}
}
function utilizationRate(ILendingPair _pair, address _token) public view returns(uint) {
uint debt = _pair.totalDebt(_token);
uint supply = IERC20(_pair.lpToken(_token)).totalSupply();
if (supply == 0 || debt == 0) { return 0; }
return _max(debt * 100e18 / supply, 100e18);
}
// InterestRateModel can later be replaced for more granular fees per _lendingPair
function systemRate(ILendingPair _pair) public pure returns(uint) {
return SYSTEM_RATE;
}
function _max(uint _valueA, uint _valueB) internal pure returns(uint) {
return _valueA > _valueB ? _valueB : _valueA;
}
} | 50% - share of borrowRate earned by the system
| uint public constant SYSTEM_RATE = 50e18; | 2,084,985 | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import { AddressUtils } from '../../../utils/AddressUtils.sol';
import { EnumerableMap } from '../../../utils/EnumerableMap.sol';
import { EnumerableSet } from '../../../utils/EnumerableSet.sol';
import { IERC721 } from '../IERC721.sol';
import { IERC721Receiver } from '../IERC721Receiver.sol';
import { ERC721BaseStorage } from './ERC721BaseStorage.sol';
import { ERC721BaseInternal } from './ERC721BaseInternal.sol';
/**
* @title Base ERC721 implementation, excluding optional extensions
*/
abstract contract ERC721Base is IERC721, ERC721BaseInternal {
using AddressUtils for address;
using EnumerableMap for EnumerableMap.UintToAddressMap;
using EnumerableSet for EnumerableSet.UintSet;
/**
* @inheritdoc IERC721
*/
function balanceOf(address account) public view returns (uint256) {
return _balanceOf(account);
}
/**
* @inheritdoc IERC721
*/
function ownerOf(uint256 tokenId) public view returns (address) {
return _ownerOf(tokenId);
}
/**
* @inheritdoc IERC721
*/
function getApproved(uint256 tokenId) public view returns (address) {
return _getApproved(tokenId);
}
/**
* @inheritdoc IERC721
*/
function isApprovedForAll(address account, address operator)
public
view
returns (bool)
{
return _isApprovedForAll(account, operator);
}
/**
* @inheritdoc IERC721
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public payable {
_handleTransferMessageValue(from, to, tokenId, msg.value);
require(
_isApprovedOrOwner(msg.sender, tokenId),
'ERC721: transfer caller is not owner or approved'
);
_transfer(from, to, tokenId);
}
/**
* @inheritdoc IERC721
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public payable {
safeTransferFrom(from, to, tokenId, '');
}
/**
* @inheritdoc IERC721
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory data
) public payable {
_handleTransferMessageValue(from, to, tokenId, msg.value);
require(
_isApprovedOrOwner(msg.sender, tokenId),
'ERC721: transfer caller is not owner or approved'
);
_safeTransfer(from, to, tokenId, data);
}
/**
* @inheritdoc IERC721
*/
function approve(address operator, uint256 tokenId) public payable {
_handleApproveMessageValue(operator, tokenId, msg.value);
address owner = ownerOf(tokenId);
require(operator != owner, 'ERC721: approval to current owner');
require(
msg.sender == owner || isApprovedForAll(owner, msg.sender),
'ERC721: approve caller is not owner nor approved for all'
);
_approve(operator, tokenId);
}
/**
* @inheritdoc IERC721
*/
function setApprovalForAll(address operator, bool status) public {
require(operator != msg.sender, 'ERC721: approve to caller');
ERC721BaseStorage.layout().operatorApprovals[msg.sender][
operator
] = status;
emit ApprovalForAll(msg.sender, operator, status);
}
}
| * @title Base ERC721 implementation, excluding optional extensions/ | abstract contract ERC721Base is IERC721, ERC721BaseInternal {
using AddressUtils for address;
using EnumerableMap for EnumerableMap.UintToAddressMap;
using EnumerableSet for EnumerableSet.UintSet;
import { AddressUtils } from '../../../utils/AddressUtils.sol';
import { EnumerableMap } from '../../../utils/EnumerableMap.sol';
import { EnumerableSet } from '../../../utils/EnumerableSet.sol';
import { IERC721 } from '../IERC721.sol';
import { IERC721Receiver } from '../IERC721Receiver.sol';
import { ERC721BaseStorage } from './ERC721BaseStorage.sol';
import { ERC721BaseInternal } from './ERC721BaseInternal.sol';
function balanceOf(address account) public view returns (uint256) {
return _balanceOf(account);
}
function ownerOf(uint256 tokenId) public view returns (address) {
return _ownerOf(tokenId);
}
function getApproved(uint256 tokenId) public view returns (address) {
return _getApproved(tokenId);
}
function isApprovedForAll(address account, address operator)
public
view
returns (bool)
{
return _isApprovedForAll(account, operator);
}
function transferFrom(
address from,
address to,
uint256 tokenId
) public payable {
_handleTransferMessageValue(from, to, tokenId, msg.value);
require(
_isApprovedOrOwner(msg.sender, tokenId),
'ERC721: transfer caller is not owner or approved'
);
_transfer(from, to, tokenId);
}
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public payable {
safeTransferFrom(from, to, tokenId, '');
}
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory data
) public payable {
_handleTransferMessageValue(from, to, tokenId, msg.value);
require(
_isApprovedOrOwner(msg.sender, tokenId),
'ERC721: transfer caller is not owner or approved'
);
_safeTransfer(from, to, tokenId, data);
}
function approve(address operator, uint256 tokenId) public payable {
_handleApproveMessageValue(operator, tokenId, msg.value);
address owner = ownerOf(tokenId);
require(operator != owner, 'ERC721: approval to current owner');
require(
msg.sender == owner || isApprovedForAll(owner, msg.sender),
'ERC721: approve caller is not owner nor approved for all'
);
_approve(operator, tokenId);
}
function setApprovalForAll(address operator, bool status) public {
require(operator != msg.sender, 'ERC721: approve to caller');
ERC721BaseStorage.layout().operatorApprovals[msg.sender][
operator
] = status;
emit ApprovalForAll(msg.sender, operator, status);
}
}
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pragma solidity ^0.4.13;
contract CentraAsiaWhiteList {
using SafeMath for uint;
address public owner;
uint public operation;
mapping(uint => address) public operation_address;
mapping(uint => uint) public operation_amount;
// Functions with this modifier can only be executed by the owner
modifier onlyOwner() {
if (msg.sender != owner) {
throw;
}
_;
}
// Constructor
function CentraAsiaWhiteList() {
owner = msg.sender;
operation = 0;
}
//default function for crowdfunding
function() payable {
if(msg.value < 0) throw;
if(this.balance > 47000000000000000000000) throw; // 0.1 eth
if(now > 1505865600)throw; // timestamp 2017.09.20 00:00:00
operation_address[operation] = msg.sender;
operation_amount[operation] = msg.value;
operation = operation.add(1);
}
//Withdraw money from contract balance to owner
function withdraw() onlyOwner returns (bool result) {
owner.send(this.balance);
return true;
}
}
/**
* Math operations with safety checks
*/
library SafeMath {
function mul(uint a, uint b) internal returns (uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint a, uint b) internal returns (uint) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint a, uint b) internal returns (uint) {
assert(b <= a);
return a - b;
}
function add(uint a, uint b) internal returns (uint) {
uint c = a + b;
assert(c >= a);
return c;
}
function max64(uint64 a, uint64 b) internal constant returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal constant returns (uint64) {
return a < b ? a : b;
}
function max256(uint256 a, uint256 b) internal constant returns (uint256) {
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b) internal constant returns (uint256) {
return a < b ? a : b;
}
function assert(bool assertion) internal {
if (!assertion) {
throw;
}
}
} | assert(b > 0); Solidity automatically throws when dividing by 0 assert(a == b * c + a % b); There is no case in which this doesn't hold | function div(uint a, uint b) internal returns (uint) {
uint c = a / b;
return c;
}
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] |
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