Overview
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0 FTM
FTM Value
$0.00More Info
Private Name Tags
ContractCreator:
Sponsored
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0x61014060 | 21444829 | 871 days ago | IN | Create: UniswapV2AnchorSwapper | 0 FTM | 0.38171988 |
Latest 1 internal transaction
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21444829 | 871 days ago | Contract Creation | 0 FTM |
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Contract Name:
UniswapV2AnchorSwapper
Compiler Version
v0.8.9+commit.e5eed63a
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4 <0.9.0; import '@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol'; import '@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol'; import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol'; import '@openzeppelin/contracts/utils/math/Math.sol'; import './SyncSwapper.sol'; interface IUniswapV2AnchorSwapper is ISyncSwapper { // solhint-disable-next-line func-name-mixedcase function WANCHOR() external view returns (address); // solhint-disable-next-line func-name-mixedcase function WETH() external view returns (address); // solhint-disable-next-line func-name-mixedcase function FACTORY() external view returns (address); // solhint-disable-next-line func-name-mixedcase function ROUTER() external view returns (address); } contract UniswapV2AnchorSwapper is IUniswapV2AnchorSwapper, SyncSwapper { using SafeERC20 for IERC20; // solhint-disable-next-line var-name-mixedcase address public immutable override WETH; // solhint-disable-next-line var-name-mixedcase address public immutable override WANCHOR; // solhint-disable-next-line var-name-mixedcase address public immutable override FACTORY; // solhint-disable-next-line var-name-mixedcase address public immutable override ROUTER; constructor( address _governor, address _tradeFactory, address _weth, address _wanchor, address _factory, address _router ) SyncSwapper(_governor, _tradeFactory) { WETH = _weth; WANCHOR = _wanchor; FACTORY = _factory; ROUTER = _router; } function _executeSwap( address _receiver, address _tokenIn, address _tokenOut, uint256 _amountIn, uint256 _maxSlippage, bytes calldata _data ) internal override returns (uint256 _receivedAmount) { address[] memory _path; uint256 _amountOut; if (_data.length > 0) { _path = abi.decode(_data, (address[])); _amountOut = IUniswapV2Router02(ROUTER).getAmountsOut(_amountIn, _path)[_path.length - 1]; } else { (_path, _amountOut) = _getPathAndAmountOut(_tokenIn, _tokenOut, _amountIn); } IERC20(_path[0]).approve(ROUTER, 0); IERC20(_path[0]).approve(ROUTER, _amountIn); _receivedAmount = IUniswapV2Router02(ROUTER).swapExactTokensForTokens( _amountIn, _amountOut - ((_amountOut * _maxSlippage) / SLIPPAGE_PRECISION / 100), // slippage calcs _path, _receiver, block.timestamp + 1800 )[_path.length - 1]; } function _getPathAndAmountOut( address _tokenIn, address _tokenOut, uint256 _amountIn ) internal view returns (address[] memory _path, uint256 _amountOut) { uint256 _amountOutByDirectPath; address[] memory _directPath; if (IUniswapV2Factory(FACTORY).getPair(_tokenIn, _tokenOut) != address(0)) { _directPath = new address[](2); _directPath[0] = _tokenIn; _directPath[1] = _tokenOut; _amountOutByDirectPath = IUniswapV2Router02(ROUTER).getAmountsOut(_amountIn, _directPath)[1]; } uint256 _amountOutByWETHHopPath; // solhint-disable-next-line var-name-mixedcase address[] memory _WETHHopPath; if (IUniswapV2Factory(FACTORY).getPair(_tokenIn, WETH) != address(0) && IUniswapV2Factory(FACTORY).getPair(WETH, _tokenOut) != address(0)) { _WETHHopPath = new address[](3); _WETHHopPath[0] = _tokenIn; _WETHHopPath[1] = WETH; _WETHHopPath[2] = _tokenOut; _amountOutByWETHHopPath = IUniswapV2Router02(ROUTER).getAmountsOut(_amountIn, _WETHHopPath)[2]; } uint256 _amountOutByWANCHORHopPath; // solhint-disable-next-line var-name-mixedcase address[] memory _WANCHORHopPath; if ( IUniswapV2Factory(FACTORY).getPair(_tokenIn, WANCHOR) != address(0) && IUniswapV2Factory(FACTORY).getPair(WANCHOR, _tokenOut) != address(0) ) { _WANCHORHopPath = new address[](3); _WANCHORHopPath[0] = _tokenIn; _WANCHORHopPath[1] = WANCHOR; _WANCHORHopPath[2] = _tokenOut; _amountOutByWANCHORHopPath = IUniswapV2Router02(ROUTER).getAmountsOut(_amountIn, _WANCHORHopPath)[2]; } if ( Math.max(Math.max(_amountOutByDirectPath, _amountOutByWETHHopPath), Math.max(_amountOutByDirectPath, _amountOutByWANCHORHopPath)) == _amountOutByDirectPath ) { return (_directPath, _amountOutByDirectPath); } if (Math.max(_amountOutByWETHHopPath, _amountOutByWANCHORHopPath) == _amountOutByWETHHopPath) { return (_WETHHopPath, _amountOutByWETHHopPath); } return (_WANCHORHopPath, _amountOutByWANCHORHopPath); } }
pragma solidity >=0.6.2; import './IUniswapV2Router01.sol'; interface IUniswapV2Router02 is IUniswapV2Router01 { function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH); function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountETH); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function swapExactETHForTokensSupportingFeeOnTransferTokens( uint amountOutMin, address[] calldata path, address to, uint deadline ) external payable; function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; }
pragma solidity >=0.5.0; 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 ^0.8.0; 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 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. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a / b + (a % b == 0 ? 0 : 1); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4 <0.9.0; import '../Swapper.sol'; interface ISyncSwapper is ISwapper { event Swapped( address _receiver, address _tokenIn, address _tokenOut, uint256 _amountIn, uint256 _maxSlippage, uint256 _receivedAmount, bytes _data ); // solhint-disable-next-line func-name-mixedcase function SLIPPAGE_PRECISION() external view returns (uint256); function swap( address _receiver, address _tokenIn, address _tokenOut, uint256 _amountIn, uint256 _maxSlippage, bytes calldata _data ) external returns (uint256 _receivedAmount); } abstract contract SyncSwapper is ISyncSwapper, Swapper { // solhint-disable-next-line var-name-mixedcase uint256 public immutable override SLIPPAGE_PRECISION = 10000; // 1 is 0.0001%, 1_000 is 0.1% // solhint-disable-next-line var-name-mixedcase SwapperType public constant override SWAPPER_TYPE = SwapperType.SYNC; constructor(address _governor, address _tradeFactory) Governable(_governor) Swapper(_tradeFactory) {} function _assertPreSwap( address _receiver, address _tokenIn, address _tokenOut, uint256 _amountIn, uint256 _maxSlippage ) internal pure { if (_receiver == address(0) || _tokenIn == address(0) || _tokenOut == address(0)) revert CommonErrors.ZeroAddress(); if (_amountIn == 0) revert CommonErrors.ZeroAmount(); if (_maxSlippage == 0) revert CommonErrors.ZeroSlippage(); } function _executeSwap( address _receiver, address _tokenIn, address _tokenOut, uint256 _amountIn, uint256 _maxSlippage, bytes calldata _data ) internal virtual returns (uint256 _receivedAmount); function swap( address _receiver, address _tokenIn, address _tokenOut, uint256 _amountIn, uint256 _maxSlippage, bytes calldata _data ) external virtual override onlyTradeFactory returns (uint256 _receivedAmount) { _assertPreSwap(_receiver, _tokenIn, _tokenOut, _amountIn, _maxSlippage); _receivedAmount = _executeSwap(_receiver, _tokenIn, _tokenOut, _amountIn, _maxSlippage, _data); emit Swapped(_receiver, _tokenIn, _tokenOut, _amountIn, _maxSlippage, _receivedAmount, _data); } }
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 ^0.8.0; /** * @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 >=0.8.4 <0.9.0; import '@openzeppelin/contracts/token/ERC20/IERC20.sol'; import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol'; import '@yearn/contract-utils/contracts/utils/Governable.sol'; import '@yearn/contract-utils/contracts/utils/CollectableDust.sol'; import '../libraries/CommonErrors.sol'; interface ISwapper { enum SwapperType { ASYNC, SYNC } // solhint-disable-next-line func-name-mixedcase function TRADE_FACTORY() external view returns (address); // solhint-disable-next-line func-name-mixedcase function SWAPPER_TYPE() external view returns (SwapperType); } abstract contract Swapper is ISwapper, Governable, CollectableDust { using SafeERC20 for IERC20; // solhint-disable-next-line var-name-mixedcase address public immutable override TRADE_FACTORY; constructor(address _tradeFactory) { if (_tradeFactory == address(0)) revert CommonErrors.ZeroAddress(); TRADE_FACTORY = _tradeFactory; } modifier onlyTradeFactory() { if (msg.sender != TRADE_FACTORY) revert CommonErrors.NotAuthorized(); _; } function sendDust( address _to, address _token, uint256 _amount ) external virtual override onlyGovernor { _sendDust(_to, _token, _amount); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4 <0.9.0; import '../interfaces/utils/IGovernable.sol'; contract Governable is IGovernable { address public override governor; address public override pendingGovernor; constructor(address _governor) { require(_governor != address(0), 'governable/governor-should-not-be-zero-address'); governor = _governor; } function setPendingGovernor(address _pendingGovernor) external virtual override onlyGovernor { _setPendingGovernor(_pendingGovernor); } function acceptGovernor() external virtual override onlyPendingGovernor { _acceptGovernor(); } function _setPendingGovernor(address _pendingGovernor) internal { require(_pendingGovernor != address(0), 'governable/pending-governor-should-not-be-zero-addres'); pendingGovernor = _pendingGovernor; emit PendingGovernorSet(_pendingGovernor); } function _acceptGovernor() internal { governor = pendingGovernor; pendingGovernor = address(0); emit GovernorAccepted(); } function isGovernor(address _account) public view override returns (bool _isGovernor) { return _account == governor; } modifier onlyGovernor() { require(isGovernor(msg.sender), 'governable/only-governor'); _; } modifier onlyPendingGovernor() { require(msg.sender == pendingGovernor, 'governable/only-pending-governor'); _; } }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4 <0.9.0; import '@openzeppelin/contracts/utils/structs/EnumerableSet.sol'; import '@openzeppelin/contracts/token/ERC20/IERC20.sol'; import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol'; import '../interfaces/utils/ICollectableDust.sol'; abstract contract CollectableDust is ICollectableDust { using SafeERC20 for IERC20; using EnumerableSet for EnumerableSet.AddressSet; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; EnumerableSet.AddressSet internal protocolTokens; constructor() {} function _addProtocolToken(address _token) internal { require(!protocolTokens.contains(_token), 'collectable-dust/token-is-part-of-the-protocol'); protocolTokens.add(_token); } function _removeProtocolToken(address _token) internal { require(protocolTokens.contains(_token), 'collectable-dust/token-not-part-of-the-protocol'); protocolTokens.remove(_token); } function _sendDust( address _to, address _token, uint256 _amount ) internal { require(_to != address(0), 'collectable-dust/cant-send-dust-to-zero-address'); require(!protocolTokens.contains(_token), 'collectable-dust/token-is-part-of-the-protocol'); if (_token == ETH_ADDRESS) { payable(_to).transfer(_amount); } else { IERC20(_token).safeTransfer(_to, _amount); } emit DustSent(_to, _token, _amount); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4 <0.9.0; library CommonErrors { error ZeroAddress(); error NotAuthorized(); error ZeroAmount(); error ZeroSlippage(); error IncorrectSwapInformation(); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4 <0.9.0; interface IGovernable { event PendingGovernorSet(address pendingGovernor); event GovernorAccepted(); function setPendingGovernor(address _pendingGovernor) external; function acceptGovernor() external; function governor() external view returns (address _governor); function pendingGovernor() external view returns (address _pendingGovernor); function isGovernor(address _account) external view returns (bool _isGovernor); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { return _values(set._inner); } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; assembly { result := store } return result; } }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4 <0.9.0; interface ICollectableDust { event DustSent(address _to, address token, uint256 amount); function sendDust( address _to, address _token, uint256 _amount ) external; }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "metadata": { "useLiteralContent": true }, "libraries": {} }
Contract Security Audit
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[{"inputs":[{"internalType":"address","name":"_governor","type":"address"},{"internalType":"address","name":"_tradeFactory","type":"address"},{"internalType":"address","name":"_weth","type":"address"},{"internalType":"address","name":"_wanchor","type":"address"},{"internalType":"address","name":"_factory","type":"address"},{"internalType":"address","name":"_router","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"NotAuthorized","type":"error"},{"inputs":[],"name":"ZeroAddress","type":"error"},{"inputs":[],"name":"ZeroAmount","type":"error"},{"inputs":[],"name":"ZeroSlippage","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_to","type":"address"},{"indexed":false,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"DustSent","type":"event"},{"anonymous":false,"inputs":[],"name":"GovernorAccepted","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"pendingGovernor","type":"address"}],"name":"PendingGovernorSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_receiver","type":"address"},{"indexed":false,"internalType":"address","name":"_tokenIn","type":"address"},{"indexed":false,"internalType":"address","name":"_tokenOut","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amountIn","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_maxSlippage","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_receivedAmount","type":"uint256"},{"indexed":false,"internalType":"bytes","name":"_data","type":"bytes"}],"name":"Swapped","type":"event"},{"inputs":[],"name":"ETH_ADDRESS","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"FACTORY","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ROUTER","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"SLIPPAGE_PRECISION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"SWAPPER_TYPE","outputs":[{"internalType":"enum ISwapper.SwapperType","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TRADE_FACTORY","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"WANCHOR","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"WETH","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"acceptGovernor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"governor","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"}],"name":"isGovernor","outputs":[{"internalType":"bool","name":"_isGovernor","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingGovernor","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"sendDust","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_pendingGovernor","type":"address"}],"name":"setPendingGovernor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_receiver","type":"address"},{"internalType":"address","name":"_tokenIn","type":"address"},{"internalType":"address","name":"_tokenOut","type":"address"},{"internalType":"uint256","name":"_amountIn","type":"uint256"},{"internalType":"uint256","name":"_maxSlippage","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"swap","outputs":[{"internalType":"uint256","name":"_receivedAmount","type":"uint256"}],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000009f2a061d6fef20ad3a656e23fd9c814b75fd580300000000000000000000000034aa402d943ea983ebf890bd4b4d71239b6e2c0000000000000000000000000074b23882a30290451a17c44f4f05243b6b58c76d00000000000000000000000021be370d5312f44cb42ce377bc9b8a0cef1a4c83000000000000000000000000152ee697f2e276fa89e96742e9bb9ab1f2e61be3000000000000000000000000f491e7b69e4244ad4002bc14e878a34207e38c29
-----Decoded View---------------
Arg [0] : _governor (address): 0x9f2A061d6fEF20ad3A656e23fd9C814b75fd5803
Arg [1] : _tradeFactory (address): 0x34aA402D943Ea983EBF890bD4B4d71239B6E2C00
Arg [2] : _weth (address): 0x74b23882a30290451A17c44f4F05243b6b58C76d
Arg [3] : _wanchor (address): 0x21be370D5312f44cB42ce377BC9b8a0cEF1A4C83
Arg [4] : _factory (address): 0x152eE697f2E276fA89E96742e9bB9aB1F2E61bE3
Arg [5] : _router (address): 0xF491e7B69E4244ad4002BC14e878a34207E38c29
-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 0000000000000000000000009f2a061d6fef20ad3a656e23fd9c814b75fd5803
Arg [1] : 00000000000000000000000034aa402d943ea983ebf890bd4b4d71239b6e2c00
Arg [2] : 00000000000000000000000074b23882a30290451a17c44f4f05243b6b58c76d
Arg [3] : 00000000000000000000000021be370d5312f44cb42ce377bc9b8a0cef1a4c83
Arg [4] : 000000000000000000000000152ee697f2e276fa89e96742e9bb9ab1f2e61be3
Arg [5] : 000000000000000000000000f491e7b69e4244ad4002bc14e878a34207e38c29
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.