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16828685 | 534 days ago | 21.91656866 ETH | ||||
16828685 | 534 days ago | 10.90765941 ETH | ||||
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15872388 | 667 days ago | 26.05857517 ETH | ||||
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15837115 | 672 days ago | 14.79964766 ETH | ||||
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14757855 | 841 days ago | 3.15920243 ETH | ||||
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13764934 | 995 days ago | 1.41335334 ETH | ||||
13764934 | 995 days ago | 0.70551685 ETH | ||||
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13747631 | 998 days ago | 21.15149223 ETH |
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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0x12A1B67b...bC6596507 The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
StrategyLiquidate
Compiler Version
v0.5.16+commit.9c3226ce
Contract Source Code (Solidity Standard Json-Input format)
pragma solidity 0.5.16; import 'OpenZeppelin/[email protected]/contracts/ownership/Ownable.sol'; import 'OpenZeppelin/[email protected]/contracts/utils/ReentrancyGuard.sol'; import 'Uniswap/[email protected]/contracts/interfaces/IUniswapV2Factory.sol'; import 'Uniswap/[email protected]/contracts/interfaces/IUniswapV2Pair.sol'; import "./uniswap/IUniswapV2Router02.sol"; import "./SafeToken.sol"; import "./Strategy.sol"; contract StrategyLiquidate is Ownable, ReentrancyGuard, Strategy { using SafeToken for address; IUniswapV2Factory public factory; IUniswapV2Router02 public router; address public weth; mapping(address => bool) public whitelistedTokens; /// @dev Create a new liquidate strategy instance. /// @param _router The Uniswap router smart contract. constructor(IUniswapV2Router02 _router) public { factory = IUniswapV2Factory(_router.factory()); router = _router; weth = _router.WETH(); } /// @dev Set whitelisted tokens /// @param tokens Token list to set whitelist status /// @param statuses Status list to set tokens to function setWhitelistTokens(address[] calldata tokens, bool[] calldata statuses) external onlyOwner { require(tokens.length == statuses.length, 'tokens & statuses length mismatched'); for (uint256 idx = 0; idx < tokens.length; idx++) { whitelistedTokens[tokens[idx]] = statuses[idx]; } } /// @dev Execute worker strategy. Take LP tokens + ETH. Return LP tokens + ETH. /// @param data Extra calldata information passed along to this strategy. function execute(address /* user */, uint256 /* debt */, bytes calldata data) external payable nonReentrant { // 1. Find out what farming token we are dealing with. (address fToken, uint256 minETH) = abi.decode(data, (address, uint256)); require(whitelistedTokens[fToken], 'token not whitelisted'); IUniswapV2Pair lpToken = IUniswapV2Pair(factory.getPair(fToken, weth)); // 2. Remove all liquidity back to ETH and farming tokens. lpToken.approve(address(router), uint256(-1)); router.removeLiquidityETH(fToken, lpToken.balanceOf(address(this)), 0, 0, address(this), now); // 3. Convert farming tokens to ETH. address[] memory path = new address[](2); path[0] = fToken; path[1] = weth; fToken.safeApprove(address(router), 0); fToken.safeApprove(address(router), uint256(-1)); router.swapExactTokensForETH(fToken.myBalance(), 0, path, address(this), now); // 4. Return all ETH back to the original caller. uint256 balance = address(this).balance; require(balance >= minETH, "insufficient ETH received"); SafeToken.safeTransferETH(msg.sender, balance); } /// @dev Recover ERC20 tokens that were accidentally sent to this smart contract. /// @param token The token contract. Can be anything. This contract should not hold ERC20 tokens. /// @param to The address to send the tokens to. /// @param value The number of tokens to transfer to `to`. function recover(address token, address to, uint256 value) external onlyOwner nonReentrant { token.safeTransfer(to, value); } function() external payable {} }
pragma solidity >=0.5.0; interface IUniswapV2Router02 { function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidity( address tokenA, address tokenB, uint256 amountADesired, uint256 amountBDesired, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline ) external returns ( uint256 amountA, uint256 amountB, uint256 liquidity ); function addLiquidityETH( address token, uint256 amountTokenDesired, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline ) external payable returns ( uint256 amountToken, uint256 amountETH, uint256 liquidity ); function removeLiquidity( address tokenA, address tokenB, uint256 liquidity, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline ) external returns (uint256 amountA, uint256 amountB); function removeLiquidityETH( address token, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline ) external returns (uint256 amountToken, uint256 amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint256 liquidity, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint256 amountA, uint256 amountB); function removeLiquidityETHWithPermit( address token, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint256 amountToken, uint256 amountETH); function swapExactTokensForTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external returns (uint256[] memory amounts); function swapTokensForExactTokens( uint256 amountOut, uint256 amountInMax, address[] calldata path, address to, uint256 deadline ) external returns (uint256[] memory amounts); function swapExactETHForTokens( uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external payable returns (uint256[] memory amounts); function swapTokensForExactETH( uint256 amountOut, uint256 amountInMax, address[] calldata path, address to, uint256 deadline ) external returns (uint256[] memory amounts); function swapExactTokensForETH( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external returns (uint256[] memory amounts); function swapETHForExactTokens( uint256 amountOut, address[] calldata path, address to, uint256 deadline ) external payable returns (uint256[] memory amounts); function quote( uint256 amountA, uint256 reserveA, uint256 reserveB ) external pure returns (uint256 amountB); function getAmountOut( uint256 amountIn, uint256 reserveIn, uint256 reserveOut ) external pure returns (uint256 amountOut); function getAmountIn( uint256 amountOut, uint256 reserveIn, uint256 reserveOut ) external pure returns (uint256 amountIn); function getAmountsOut(uint256 amountIn, address[] calldata path) external view returns (uint256[] memory amounts); function getAmountsIn(uint256 amountOut, address[] calldata path) external view returns (uint256[] memory amounts); function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline ) external returns (uint256 amountETH); function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint256 amountETH); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external; function swapExactETHForTokensSupportingFeeOnTransferTokens( uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external payable; function swapExactTokensForETHSupportingFeeOnTransferTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external; }
pragma solidity >=0.5.0; import 'Uniswap/[email protected]/contracts/interfaces/IUniswapV2Pair.sol'; import 'Uniswap/[email protected]/contracts/interfaces/IUniswapV2Factory.sol'; import 'OpenZeppelin/[email protected]/contracts/math/SafeMath.sol'; library UniswapV2Library { using SafeMath for uint256; // 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 view returns (address pair) { return IUniswapV2Factory(factory).getPair(tokenA, tokenB); // For easy testing // (address token0, address token1) = sortTokens(tokenA, tokenB); // pair = address( // uint256( // keccak256( // abi.encodePacked( // hex'ff', // factory, // keccak256(abi.encodePacked(token0, token1)), // hex'fc4928e335b531bb85a6d9454f46863f9d6101351e3e8b84620b1806d4a3fcb3' // init code hash // ) // ) // ) // ); } // fetches and sorts the reserves for a pair function getReserves( address factory, address tokenA, address tokenB ) internal view returns (uint256 reserveA, uint256 reserveB) { (address token0, ) = sortTokens(tokenA, tokenB); (uint256 reserve0, uint256 reserve1, ) = IUniswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves(); (reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0); } // given some amount of an asset and pair reserves, returns an equivalent amount of the other asset function quote( uint256 amountA, uint256 reserveA, uint256 reserveB ) internal pure returns (uint256 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( uint256 amountIn, uint256 reserveIn, uint256 reserveOut ) internal pure returns (uint256 amountOut) { require(amountIn > 0, 'UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT'); require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY'); uint256 amountInWithFee = amountIn.mul(997); uint256 numerator = amountInWithFee.mul(reserveOut); uint256 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( uint256 amountOut, uint256 reserveIn, uint256 reserveOut ) internal pure returns (uint256 amountIn) { require(amountOut > 0, 'UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT'); require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY'); uint256 numerator = reserveIn.mul(amountOut).mul(1000); uint256 denominator = reserveOut.sub(amountOut).mul(997); amountIn = (numerator / denominator).add(1); } // performs chained getAmountOut calculations on any number of pairs function getAmountsOut( address factory, uint256 amountIn, address[] memory path ) internal view returns (uint256[] memory amounts) { require(path.length >= 2, 'UniswapV2Library: INVALID_PATH'); amounts = new uint256[](path.length); amounts[0] = amountIn; for (uint256 i; i < path.length - 1; i++) { (uint256 reserveIn, uint256 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, uint256 amountOut, address[] memory path ) internal view returns (uint256[] memory amounts) { require(path.length >= 2, 'UniswapV2Library: INVALID_PATH'); amounts = new uint256[](path.length); amounts[amounts.length - 1] = amountOut; for (uint256 i = path.length - 1; i > 0; i--) { (uint256 reserveIn, uint256 reserveOut) = getReserves(factory, path[i - 1], path[i]); amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut); } } }
pragma solidity =0.5.16; import 'Uniswap/[email protected]/contracts/interfaces/IUniswapV2Factory.sol'; import "OpenZeppelin/[email protected]/contracts/token/ERC20/IERC20.sol"; import 'OpenZeppelin/[email protected]/contracts/math/SafeMath.sol'; import "../weth/IWETH.sol"; import "./UniswapV2Library.sol"; import "./IUniswapV2Router02.sol"; // helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false library TransferHelper { function safeApprove( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call( abi.encodeWithSelector(0x095ea7b3, to, value) ); require( success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper: APPROVE_FAILED" ); } function safeTransfer( address token, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call( abi.encodeWithSelector(0xa9059cbb, to, value) ); require( success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper: TRANSFER_FAILED" ); } function safeTransferFrom( address token, address from, address to, uint256 value ) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call( abi.encodeWithSelector(0x23b872dd, from, to, value) ); require( success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper: TRANSFER_FROM_FAILED" ); } function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call.value(value)(new bytes(0)); require(success, "TransferHelper: ETH_TRANSFER_FAILED"); } } contract UniswapV2Router02 is IUniswapV2Router02 { using SafeMath for uint256; address public factory; address public WETH; modifier ensure(uint256 deadline) { require(deadline >= block.timestamp, "UniswapV2Router: EXPIRED"); _; } constructor(address _factory, address _WETH) public { factory = _factory; WETH = _WETH; } function() external payable { assert(msg.sender == WETH); // only accept ETH via fallback from the WETH contract } // **** ADD LIQUIDITY **** function _addLiquidity( address tokenA, address tokenB, uint256 amountADesired, uint256 amountBDesired, uint256 amountAMin, uint256 amountBMin ) internal returns (uint256 amountA, uint256 amountB) { // create the pair if it doesn't exist yet if (IUniswapV2Factory(factory).getPair(tokenA, tokenB) == address(0)) { IUniswapV2Factory(factory).createPair(tokenA, tokenB); } (uint256 reserveA, uint256 reserveB) = UniswapV2Library.getReserves( factory, tokenA, tokenB ); if (reserveA == 0 && reserveB == 0) { (amountA, amountB) = (amountADesired, amountBDesired); } else { uint256 amountBOptimal = UniswapV2Library.quote( amountADesired, reserveA, reserveB ); if (amountBOptimal <= amountBDesired) { require( amountBOptimal >= amountBMin, "UniswapV2Router: INSUFFICIENT_B_AMOUNT" ); (amountA, amountB) = (amountADesired, amountBOptimal); } else { uint256 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, uint256 amountADesired, uint256 amountBDesired, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline ) external ensure(deadline) returns ( uint256 amountA, uint256 amountB, uint256 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, uint256 amountTokenDesired, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline ) external payable ensure(deadline) returns ( uint256 amountToken, uint256 amountETH, uint256 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, uint256 liquidity, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline ) public ensure(deadline) returns (uint256 amountA, uint256 amountB) { address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB); IUniswapV2Pair(pair).transferFrom(msg.sender, pair, liquidity); // send liquidity to pair (uint256 amount0, uint256 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, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline ) public ensure(deadline) returns (uint256 amountToken, uint256 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, uint256 liquidity, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint256 amountA, uint256 amountB) { address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB); uint256 value = approveMax ? uint256(-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, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint256 amountToken, uint256 amountETH) { address pair = UniswapV2Library.pairFor(factory, token, WETH); uint256 value = approveMax ? uint256(-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, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline ) public ensure(deadline) returns (uint256 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, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint256 amountETH) { address pair = UniswapV2Library.pairFor(factory, token, WETH); uint256 value = approveMax ? uint256(-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( uint256[] memory amounts, address[] memory path, address _to ) internal { for (uint256 i; i < path.length - 1; i++) { (address input, address output) = (path[i], path[i + 1]); (address token0, ) = UniswapV2Library.sortTokens(input, output); uint256 amountOut = amounts[i + 1]; (uint256 amount0Out, uint256 amount1Out) = input == token0 ? (uint256(0), amountOut) : (amountOut, uint256(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( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external ensure(deadline) returns (uint256[] 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( uint256 amountOut, uint256 amountInMax, address[] calldata path, address to, uint256 deadline ) external ensure(deadline) returns (uint256[] 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( uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external payable ensure(deadline) returns (uint256[] 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( uint256 amountOut, uint256 amountInMax, address[] calldata path, address to, uint256 deadline ) external ensure(deadline) returns (uint256[] 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( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external ensure(deadline) returns (uint256[] 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( uint256 amountOut, address[] calldata path, address to, uint256 deadline ) external payable ensure(deadline) returns (uint256[] 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 { for (uint256 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) ); uint256 amountInput; uint256 amountOutput; { // scope to avoid stack too deep errors (uint256 reserve0, uint256 reserve1, ) = pair.getReserves(); (uint256 reserveInput, uint256 reserveOutput) = input == token0 ? (reserve0, reserve1) : (reserve1, reserve0); amountInput = IERC20(input).balanceOf(address(pair)).sub( reserveInput ); amountOutput = UniswapV2Library.getAmountOut( amountInput, reserveInput, reserveOutput ); } (uint256 amount0Out, uint256 amount1Out) = input == token0 ? (uint256(0), amountOutput) : (amountOutput, uint256(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( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external ensure(deadline) { TransferHelper.safeTransferFrom( path[0], msg.sender, UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn ); uint256 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( uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external payable ensure(deadline) { require(path[0] == WETH, "UniswapV2Router: INVALID_PATH"); uint256 amountIn = msg.value; IWETH(WETH).deposit.value(amountIn)(); assert( IWETH(WETH).transfer( UniswapV2Library.pairFor(factory, path[0], path[1]), amountIn ) ); uint256 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 swapExactTokensForETHSupportingFeeOnTransferTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external 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)); uint256 amountOut = IERC20(WETH).balanceOf(address(this)); require( amountOut >= amountOutMin, "UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT" ); IWETH(WETH).withdraw(amountOut); TransferHelper.safeTransferETH(to, amountOut); } // **** LIBRARY FUNCTIONS **** function quote( uint256 amountA, uint256 reserveA, uint256 reserveB ) public pure returns (uint256 amountB) { return UniswapV2Library.quote(amountA, reserveA, reserveB); } function getAmountOut( uint256 amountIn, uint256 reserveIn, uint256 reserveOut ) public pure returns (uint256 amountOut) { return UniswapV2Library.getAmountOut(amountIn, reserveIn, reserveOut); } function getAmountIn( uint256 amountOut, uint256 reserveIn, uint256 reserveOut ) public pure returns (uint256 amountIn) { return UniswapV2Library.getAmountIn(amountOut, reserveIn, reserveOut); } function getAmountsOut(uint256 amountIn, address[] memory path) public view returns (uint256[] memory amounts) { return UniswapV2Library.getAmountsOut(factory, amountIn, path); } function getAmountsIn(uint256 amountOut, address[] memory path) public view returns (uint256[] memory amounts) { return UniswapV2Library.getAmountsIn(factory, amountOut, path); } }
pragma solidity >=0.5.0; interface IWETH { function deposit() external payable; function transfer(address to, uint256 value) external returns (bool); function withdraw(uint256) external; }
pragma solidity 0.5.16; import 'OpenZeppelin/[email protected]/contracts/ownership/Ownable.sol'; import 'OpenZeppelin/[email protected]/contracts/math/SafeMath.sol'; import 'OpenZeppelin/[email protected]/contracts/utils/ReentrancyGuard.sol'; import 'Uniswap/[email protected]/contracts/interfaces/IUniswapV2Factory.sol'; import 'Uniswap/[email protected]/contracts/interfaces/IUniswapV2Pair.sol'; import 'Uniswap/[email protected]/contracts/libraries/Math.sol'; import "./uniswap/IUniswapV2Router02.sol"; import "./SafeToken.sol"; import "./Strategy.sol"; contract StrategyAddTwoSidesOptimal is Ownable, ReentrancyGuard, Strategy { using SafeToken for address; using SafeMath for uint256; IUniswapV2Factory public factory; IUniswapV2Router02 public router; address public weth; address public goblin; address public fToken_; /// @dev Create a new add two-side optimal strategy instance. /// @param _router The Uniswap router smart contract. constructor(IUniswapV2Router02 _router, address _goblin, address _fToken) public { factory = IUniswapV2Factory(_router.factory()); router = _router; weth = _router.WETH(); goblin = _goblin; fToken_ = _fToken; } /// @dev Throws if called by any account other than the goblin. modifier onlyGoblin() { require(isGoblin(), "caller is not the goblin"); _; } /// @dev Returns true if the caller is the current goblin. function isGoblin() public view returns (bool) { return msg.sender == goblin; } /// @dev Compute optimal deposit amount /// @param amtA amount of token A desired to deposit /// @param amtB amonut of token B desired to deposit /// @param resA amount of token A in reserve /// @param resB amount of token B in reserve function optimalDeposit( uint256 amtA, uint256 amtB, uint256 resA, uint256 resB ) internal pure returns (uint256 swapAmt, bool isReversed) { if (amtA.mul(resB) >= amtB.mul(resA)) { swapAmt = _optimalDepositA(amtA, amtB, resA, resB); isReversed = false; } else { swapAmt = _optimalDepositA(amtB, amtA, resB, resA); isReversed = true; } } /// @dev Compute optimal deposit amount helper /// @param amtA amount of token A desired to deposit /// @param amtB amonut of token B desired to deposit /// @param resA amount of token A in reserve /// @param resB amount of token B in reserve function _optimalDepositA( uint256 amtA, uint256 amtB, uint256 resA, uint256 resB ) internal pure returns (uint256) { require(amtA.mul(resB) >= amtB.mul(resA), "Reversed"); uint256 a = 997; uint256 b = uint256(1997).mul(resA); uint256 _c = (amtA.mul(resB)).sub(amtB.mul(resA)); uint256 c = _c.mul(1000).div(amtB.add(resB)).mul(resA); uint256 d = a.mul(c).mul(4); uint256 e = Math.sqrt(b.mul(b).add(d)); uint256 numerator = e.sub(b); uint256 denominator = a.mul(2); return numerator.div(denominator); } /// @dev Execute worker strategy. Take LP tokens + ETH. Return LP tokens + ETH. /// @param user User address /// @param data Extra calldata information passed along to this strategy. function execute(address user, uint256, /* debt */ bytes calldata data) external payable onlyGoblin nonReentrant { // 1. Find out what farming token we are dealing with. (address fToken, uint256 fAmount, uint256 minLPAmount) = abi.decode(data, (address, uint256, uint256)); require(fToken == fToken_, 'token mismatched'); IUniswapV2Pair lpToken = IUniswapV2Pair(factory.getPair(fToken, weth)); // 2. Compute the optimal amount of ETH and fToken to be converted. if (fAmount > 0) { fToken.safeTransferFrom(user, address(this), fAmount); } uint256 ethBalance = address(this).balance; uint256 swapAmt; bool isReversed; { (uint256 r0, uint256 r1, ) = lpToken.getReserves(); (uint256 ethReserve, uint256 fReserve) = lpToken.token0() == weth ? (r0, r1) : (r1, r0); (swapAmt, isReversed) = optimalDeposit(ethBalance, fToken.myBalance(), ethReserve, fReserve); } // 3. Convert between ETH and farming tokens fToken.safeApprove(address(router), 0); fToken.safeApprove(address(router), uint256(-1)); address[] memory path = new address[](2); (path[0], path[1]) = isReversed ? (fToken, weth) : (weth, fToken); if (isReversed) { router.swapExactTokensForETH(swapAmt, 0, path, address(this), now); // farming tokens to ETH } else { router.swapExactETHForTokens.value(swapAmt)(0, path, address(this), now); // ETH to farming tokens } // 4. Mint more LP tokens and return all LP tokens to the sender. (,, uint256 moreLPAmount) = router.addLiquidityETH.value(address(this).balance)( fToken, fToken.myBalance(), 0, 0, address(this), now ); require(moreLPAmount >= minLPAmount, "insufficient LP tokens received"); lpToken.transfer(msg.sender, lpToken.balanceOf(address(this))); } /// @dev Recover ERC20 tokens that were accidentally sent to this smart contract. /// @param token The token contract. Can be anything. This contract should not hold ERC20 tokens. /// @param to The address to send the tokens to. /// @param value The number of tokens to transfer to `to`. function recover(address token, address to, uint256 value) external onlyOwner nonReentrant { token.safeTransfer(to, value); } function() external payable {} }
pragma solidity 0.5.16; interface ERC20Interface { function balanceOf(address user) external view returns (uint256); } library SafeToken { function myBalance(address token) internal view returns (uint256) { return ERC20Interface(token).balanceOf(address(this)); } function balanceOf(address token, address user) internal view returns (uint256) { return ERC20Interface(token).balanceOf(user); } function safeApprove(address token, address to, uint256 value) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), "!safeApprove"); } function safeTransfer(address token, address to, uint256 value) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), "!safeTransfer"); } function safeTransferFrom(address token, address from, address to, uint256 value) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), "!safeTransferFrom"); } function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call.value(value)(new bytes(0)); require(success, "!safeTransferETH"); } }
pragma solidity 0.5.16; interface Strategy { /// @dev Execute worker strategy. Take LP tokens + BNB. Return LP tokens + BNB. /// @param user The original user that is interacting with the operator. /// @param debt The user's total debt, for better decision making context. /// @param data Extra calldata information passed along to this strategy. function execute( address user, uint debt, bytes calldata data ) external payable; }
pragma solidity 0.5.16; import 'OpenZeppelin/[email protected]/contracts/ownership/Ownable.sol'; import 'OpenZeppelin/[email protected]/contracts/math/SafeMath.sol'; import 'OpenZeppelin/[email protected]/contracts/utils/ReentrancyGuard.sol'; import 'Uniswap/[email protected]/contracts/interfaces/IUniswapV2Factory.sol'; import 'Uniswap/[email protected]/contracts/interfaces/IUniswapV2Pair.sol'; import 'Uniswap/[email protected]/contracts/libraries/Math.sol'; import "./uniswap/IUniswapV2Router02.sol"; import "./SafeToken.sol"; import "./Strategy.sol"; contract StrategyAllETHOnly is Ownable, ReentrancyGuard, Strategy { using SafeToken for address; using SafeMath for uint256; IUniswapV2Factory public factory; IUniswapV2Router02 public router; address public weth; mapping(address => bool) public whitelistedTokens; /// @dev Create a new add ETH only strategy instance. /// @param _router The Uniswap router smart contract. constructor(IUniswapV2Router02 _router) public { factory = IUniswapV2Factory(_router.factory()); router = _router; weth = _router.WETH(); } /// @dev Set whitelist tokens /// @param tokens Token list to set statuses /// @param statuses Status list to set tokens to function setWhitelistTokens(address[] calldata tokens, bool[] calldata statuses) external onlyOwner { require(tokens.length == statuses.length, 'tokens & statuses length mismatched'); for (uint256 idx = 0; idx < tokens.length; idx++) { whitelistedTokens[tokens[idx]] = statuses[idx]; } } /// @dev Execute worker strategy. Take LP tokens + ETH. Return LP tokens + ETH. /// @param data Extra calldata information passed along to this strategy. function execute(address /* user */, uint256 /* debt */, bytes calldata data) external payable nonReentrant { // 1. Find out what farming token we are dealing with and min additional LP tokens. (address fToken, uint256 minLPAmount) = abi.decode(data, (address, uint256)); require(whitelistedTokens[fToken], 'token not whitelisted'); IUniswapV2Pair lpToken = IUniswapV2Pair(factory.getPair(fToken, weth)); // 2. Compute the optimal amount of ETH to be converted to farming tokens. uint256 balance = address(this).balance; (uint256 r0, uint256 r1, ) = lpToken.getReserves(); uint256 rIn = lpToken.token0() == weth ? r0 : r1; uint256 aIn = Math.sqrt(rIn.mul(balance.mul(3988000).add(rIn.mul(3988009)))).sub(rIn.mul(1997)) / 1994; // 3. Convert that portion of ETH to farming tokens. address[] memory path = new address[](2); path[0] = weth; path[1] = fToken; router.swapExactETHForTokens.value(aIn)(0, path, address(this), now); // 4. Mint more LP tokens and return all LP tokens to the sender. fToken.safeApprove(address(router), 0); fToken.safeApprove(address(router), uint(-1)); (,, uint256 moreLPAmount) = router.addLiquidityETH.value(address(this).balance)( fToken, fToken.myBalance(), 0, 0, address(this), now ); require(moreLPAmount >= minLPAmount, "insufficient LP tokens received"); lpToken.transfer(msg.sender, lpToken.balanceOf(address(this))); } /// @dev Recover ERC20 tokens that were accidentally sent to this smart contract. /// @param token The token contract. Can be anything. This contract should not hold ERC20 tokens. /// @param to The address to send the tokens to. /// @param value The number of tokens to transfer to `to`. function recover(address token, address to, uint256 value) external onlyOwner nonReentrant { token.safeTransfer(to, value); } function() external payable {} }
pragma solidity 0.5.16; import 'OpenZeppelin/[email protected]/contracts/ownership/Ownable.sol'; import 'OpenZeppelin/[email protected]/contracts/utils/ReentrancyGuard.sol'; import 'OpenZeppelin/[email protected]/contracts/math/SafeMath.sol'; import 'Uniswap/[email protected]/contracts/interfaces/IUniswapV2Factory.sol'; import 'Uniswap/[email protected]/contracts/interfaces/IUniswapV2Pair.sol'; import './uniswap/IUniswapV2Router02.sol'; import './SafeToken.sol'; import './Strategy.sol'; contract StrategyWithdrawMinimizeTrading is Ownable, ReentrancyGuard, Strategy { using SafeToken for address; using SafeMath for uint256; IUniswapV2Factory public factory; IUniswapV2Router02 public router; address public weth; mapping(address => bool) public whitelistedTokens; /// @dev Create a new withdraw minimize trading strategy instance. /// @param _router The Uniswap router smart contract. constructor(IUniswapV2Router02 _router) public { factory = IUniswapV2Factory(_router.factory()); router = _router; weth = _router.WETH(); } /// @dev Set whitelisted tokens /// @param tokens Token list to set whitelist status /// @param statuses Status list to set tokens to function setWhitelistTokens(address[] calldata tokens, bool[] calldata statuses) external onlyOwner { require(tokens.length == statuses.length, 'tokens & statuses length mismatched'); for (uint256 idx = 0; idx < tokens.length; idx++) { whitelistedTokens[tokens[idx]] = statuses[idx]; } } /// @dev Execute worker strategy. Take LP tokens + ETH. Return LP tokens + ETH. /// @param user User address to withdraw liquidity. /// @param debt Debt amount in WAD of the user. /// @param data Extra calldata information passed along to this strategy. function execute(address user, uint256 debt, bytes calldata data) external payable nonReentrant { // 1. Find out what farming token we are dealing with. (address fToken, uint256 minFToken) = abi.decode(data, (address, uint256)); require(whitelistedTokens[fToken], 'token not whitelisted'); IUniswapV2Pair lpToken = IUniswapV2Pair(factory.getPair(fToken, weth)); // 2. Remove all liquidity back to ETH and farming tokens. lpToken.approve(address(router), uint256(-1)); router.removeLiquidityETH(fToken, lpToken.balanceOf(address(this)), 0, 0, address(this), now); // 3. Convert farming tokens to ETH. address[] memory path = new address[](2); path[0] = fToken; path[1] = weth; fToken.safeApprove(address(router), 0); fToken.safeApprove(address(router), uint256(-1)); uint256 balance = address(this).balance; if (debt > balance) { // Convert some farming tokens to ETH. uint256 remainingDebt = debt.sub(balance); router.swapTokensForExactETH(remainingDebt, fToken.myBalance(), path, address(this), now); } // 4. Return ETH back to the original caller. uint256 remainingBalance = address(this).balance; SafeToken.safeTransferETH(msg.sender, remainingBalance); // 5. Return remaining farming tokens to user. uint256 remainingFToken = fToken.myBalance(); require(remainingFToken >= minFToken, 'insufficient farming tokens received'); if (remainingFToken > 0) { fToken.safeTransfer(user, remainingFToken); } } /// @dev Recover ERC20 tokens that were accidentally sent to this smart contract. /// @param token The token contract. Can be anything. This contract should not hold ERC20 tokens. /// @param to The address to send the tokens to. /// @param value The number of tokens to transfer to `to`. function recover(address token, address to, uint256 value) external onlyOwner nonReentrant { token.safeTransfer(to, value); } function() external payable {} }
pragma solidity 0.5.16; import "./IWETH.sol"; // Copyright (C) 2015, 2016, 2017 Dapphub // This program is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License // along with this program. If not, see <http://www.gnu.org/licenses/>. // pragma solidity ^0.4.18; contract WETH is IWETH { string public name = "Wrapped Ether"; string public symbol = "WETH"; uint8 public decimals = 18; event Approval(address indexed src, address indexed guy, uint256 wad); event Transfer(address indexed src, address indexed dst, uint256 wad); event Deposit(address indexed dst, uint256 wad); event Withdrawal(address indexed src, uint256 wad); mapping(address => uint256) public balanceOf; mapping(address => mapping(address => uint256)) public allowance; function() external payable { deposit(); } function deposit() public payable { balanceOf[msg.sender] += msg.value; emit Deposit(msg.sender, msg.value); } function withdraw(uint256 wad) public { require(balanceOf[msg.sender] >= wad); balanceOf[msg.sender] -= wad; msg.sender.transfer(wad); emit Withdrawal(msg.sender, wad); } function totalSupply() public view returns (uint256) { return address(this).balance; } function approve(address guy, uint256 wad) public returns (bool) { allowance[msg.sender][guy] = wad; emit Approval(msg.sender, guy, wad); return true; } function transfer(address dst, uint256 wad) public returns (bool) { return transferFrom(msg.sender, dst, wad); } function transferFrom( address src, address dst, uint256 wad ) public returns (bool) { require(balanceOf[src] >= wad); if (src != msg.sender && allowance[src][msg.sender] != uint256(-1)) { require(allowance[src][msg.sender] >= wad); allowance[src][msg.sender] -= wad; } balanceOf[src] -= wad; balanceOf[dst] += wad; emit Transfer(src, dst, wad); return true; } } /* GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The GNU General Public License is a free, copyleft license for software and other kinds of works. The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things. To protect your rights, we need to prevent others from denying you these rights or asking you to surrender the rights. Therefore, you have certain responsibilities if you distribute copies of the software, or if you modify it: responsibilities to respect the freedom of others. For example, if you distribute copies of such a program, whether gratis or for a fee, you must pass on to the recipients the same freedoms that you received. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. Developers that use the GNU GPL protect your rights with two steps: (1) assert copyright on the software, and (2) offer you this License giving you legal permission to copy, distribute and/or modify it. For the developers' and authors' protection, the GPL clearly explains that there is no warranty for this free software. For both users' and authors' sake, the GPL requires that modified versions be marked as changed, so that their problems will not be attributed erroneously to authors of previous versions. Some devices are designed to deny users access to install or run modified versions of the software inside them, although the manufacturer can do so. This is fundamentally incompatible with the aim of protecting users' freedom to change the software. The systematic pattern of such abuse occurs in the area of products for individuals to use, which is precisely where it is most unacceptable. Therefore, we have designed this version of the GPL to prohibit the practice for those products. 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Also add information on how to contact you by electronic and paper mail. If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode: <program> Copyright (C) <year> <name of author> This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an "about box". You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see <http://www.gnu.org/licenses/>. The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read <http://www.gnu.org/philosophy/why-not-lgpl.html>. */
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; }
pragma solidity >=0.5.0; interface IUniswapV2Factory { event PairCreated(address indexed token0, address indexed token1, address pair, uint); function feeTo() external view returns (address); function feeToSetter() external view returns (address); function getPair(address tokenA, address tokenB) external view returns (address pair); function allPairs(uint) external view returns (address pair); function allPairsLength() external view returns (uint); function createPair(address tokenA, address tokenB) external returns (address pair); function setFeeTo(address) external; function setFeeToSetter(address) external; }
pragma solidity ^0.5.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SafeMath: subtraction overflow"); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, "SafeMath: division by zero"); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0, "SafeMath: modulo by zero"); return a % b; } }
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. * * > Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an `Approval` event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a `Transfer` event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to `approve`. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
pragma solidity ^0.5.0; /** * @dev Contract module 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 { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { _owner = msg.sender; emit OwnershipTransferred(address(0), _owner); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner(), "Ownable: caller is not the owner"); _; } /** * @dev Returns true if the caller is the current owner. */ function isOwner() public view returns (bool) { return msg.sender == _owner; } /** * @dev 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; } }
pragma solidity ^0.5.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the `nonReentrant` modifier * available, which can be 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"); } }
pragma solidity =0.5.16; // 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; } } }
{ "metadata": { "useLiteralContent": true }, "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"contract IUniswapV2Router02","name":"_router","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"constant":false,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"execute","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[],"name":"factory","outputs":[{"internalType":"contract IUniswapV2Factory","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"isOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"recover","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"renounceOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"router","outputs":[{"internalType":"contract IUniswapV2Router02","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address[]","name":"tokens","type":"address[]"},{"internalType":"bool[]","name":"statuses","type":"bool[]"}],"name":"setWhitelistTokens","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"weth","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"whitelistedTokens","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"}]
Deployed Bytecode
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Deployed Bytecode Sourcemap
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Swarm Source
bzzr://ee55cff862a35e2e54da7fed1d37f1cc492be530fcf65fe0d4cdca1ed7d8602e
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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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.