{ "contractName": "ValueswapV2Pair", "abi": [ { "inputs": [], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "owner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "spender", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "Approval", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "sender", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "amount0", "type": "uint256" }, { "indexed": false, "internalType": "uint256", "name": "amount1", "type": "uint256" }, { "indexed": true, "internalType": "address", "name": "to", "type": "address" } ], "name": "Burn", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "sender", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "amount0", "type": "uint256" }, { "indexed": false, "internalType": "uint256", "name": "amount1", "type": "uint256" } ], "name": "Mint", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "sender", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "amount0In", "type": "uint256" }, { "indexed": false, "internalType": "uint256", "name": "amount1In", "type": "uint256" }, { "indexed": false, "internalType": "uint256", "name": "amount0Out", "type": "uint256" }, { "indexed": false, "internalType": "uint256", "name": "amount1Out", "type": "uint256" }, { "indexed": true, "internalType": "address", "name": "to", "type": "address" } ], "name": "Swap", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "uint112", "name": "reserve0", "type": "uint112" }, { "indexed": false, "internalType": "uint112", "name": "reserve1", "type": "uint112" } ], "name": "Sync", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "from", "type": "address" }, { "indexed": true, "internalType": "address", "name": "to", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "Transfer", "type": "event" }, { "constant": true, "inputs": [], "name": "DOMAIN_SEPARATOR", "outputs": [ { "internalType": "bytes32", "name": "", "type": "bytes32" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "MINIMUM_LIQUIDITY", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "PERMIT_TYPEHASH", "outputs": [ { "internalType": "bytes32", "name": "", "type": "bytes32" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "address", "name": "", "type": "address" }, { "internalType": "address", "name": "", "type": "address" } ], "name": "allowance", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "approve", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "address", "name": "", "type": "address" } ], "name": "balanceOf", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "decimals", "outputs": [ { "internalType": "uint8", "name": "", "type": "uint8" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "factory", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "kLast", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "name", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "address", "name": "", "type": "address" } ], "name": "nonces", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "owner", "type": "address" }, { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "value", "type": "uint256" }, { "internalType": "uint256", "name": "deadline", "type": "uint256" }, { "internalType": "uint8", "name": "v", "type": "uint8" }, { "internalType": "bytes32", "name": "r", "type": "bytes32" }, { "internalType": "bytes32", "name": "s", "type": "bytes32" } ], "name": "permit", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "price0CumulativeLast", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "price1CumulativeLast", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "symbol", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "token0", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "token1", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "totalSupply", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "transfer", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "value", "type": "uint256" } ], "name": "transferFrom", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "getReserves", "outputs": [ { "internalType": "uint112", "name": "_reserve0", "type": "uint112" }, { "internalType": "uint112", "name": "_reserve1", "type": "uint112" }, { "internalType": "uint32", "name": "_blockTimestampLast", "type": "uint32" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "_token0", "type": "address" }, { "internalType": "address", "name": "_token1", "type": "address" } ], "name": "initialize", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "to", "type": "address" } ], "name": "mint", "outputs": [ { "internalType": "uint256", "name": "liquidity", "type": "uint256" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "to", "type": "address" } ], "name": "burn", "outputs": [ { "internalType": "uint256", "name": "amount0", "type": "uint256" }, { "internalType": "uint256", "name": "amount1", "type": "uint256" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "uint256", "name": "amount0Out", "type": "uint256" }, { "internalType": "uint256", "name": "amount1Out", "type": "uint256" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "bytes", "name": "data", "type": "bytes" } ], "name": "swap", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "to", "type": "address" } ], "name": "skim", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [], "name": "sync", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" } ], "metadata": "{\"compiler\":{\"version\":\"0.5.16+commit.9c3226ce\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"sender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"amount0\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"amount1\",\"type\":\"uint256\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"}],\"name\":\"Burn\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"sender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"amount0\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"amount1\",\"type\":\"uint256\"}],\"name\":\"Mint\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"sender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"amount0In\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"amount1In\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"amount0Out\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"amount1Out\",\"type\":\"uint256\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"}],\"name\":\"Swap\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint112\",\"name\":\"reserve0\",\"type\":\"uint112\"},{\"indexed\":false,\"internalType\":\"uint112\",\"name\":\"reserve1\",\"type\":\"uint112\"}],\"name\":\"Sync\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"constant\":true,\"inputs\":[],\"name\":\"DOMAIN_SEPARATOR\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"MINIMUM_LIQUIDITY\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"PERMIT_TYPEHASH\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"}],\"name\":\"burn\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"amount0\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"amount1\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"internalType\":\"uint8\",\"name\":\"\",\"type\":\"uint8\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"factory\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"getReserves\",\"outputs\":[{\"internalType\":\"uint112\",\"name\":\"_reserve0\",\"type\":\"uint112\"},{\"internalType\":\"uint112\",\"name\":\"_reserve1\",\"type\":\"uint112\"},{\"internalType\":\"uint32\",\"name\":\"_blockTimestampLast\",\"type\":\"uint32\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"_token0\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_token1\",\"type\":\"address\"}],\"name\":\"initialize\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"kLast\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"}],\"name\":\"mint\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"liquidity\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"nonces\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"deadline\",\"type\":\"uint256\"},{\"internalType\":\"uint8\",\"name\":\"v\",\"type\":\"uint8\"},{\"internalType\":\"bytes32\",\"name\":\"r\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"s\",\"type\":\"bytes32\"}],\"name\":\"permit\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"price0CumulativeLast\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"price1CumulativeLast\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"}],\"name\":\"skim\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"amount0Out\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"amount1Out\",\"type\":\"uint256\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"bytes\",\"name\":\"data\",\"type\":\"bytes\"}],\"name\":\"swap\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[],\"name\":\"sync\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"token0\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"token1\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"methods\":{}},\"userdoc\":{\"methods\":{}}},\"settings\":{\"co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"source": "pragma solidity =0.5.16;\n\nimport './interfaces/IValueswapV2Pair.sol';\nimport './ValueswapV2ERC20.sol';\nimport './libraries/Math.sol';\nimport './libraries/UQ112x112.sol';\nimport './interfaces/IERC20.sol';\nimport './interfaces/IValueswapV2Factory.sol';\nimport './interfaces/IValueswapV2Callee.sol';\n\ncontract ValueswapV2Pair is IValueswapV2Pair, ValueswapV2ERC20 {\n using SafeMath for uint;\n using UQ112x112 for uint224;\n\n uint public constant MINIMUM_LIQUIDITY = 10**3;\n bytes4 private constant SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)')));\n\n address public factory;\n address public token0;\n address public token1;\n\n uint112 private reserve0; // uses single storage slot, accessible via getReserves\n uint112 private reserve1; // uses single storage slot, accessible via getReserves\n uint32 private blockTimestampLast; // uses single storage slot, accessible via getReserves\n\n uint public price0CumulativeLast;\n uint public price1CumulativeLast;\n uint public kLast; // reserve0 * reserve1, as of immediately after the most recent liquidity event\n\n uint private unlocked = 1;\n modifier lock() {\n require(unlocked == 1, 'ValueswapV2: LOCKED');\n unlocked = 0;\n _;\n unlocked = 1;\n }\n\n function getReserves() public view returns (uint112 _reserve0, uint112 _reserve1, uint32 _blockTimestampLast) {\n _reserve0 = reserve0;\n _reserve1 = reserve1;\n _blockTimestampLast = blockTimestampLast;\n }\n\n function _safeTransfer(address token, address to, uint value) private {\n (bool success, bytes memory data) = token.call(abi.encodeWithSelector(SELECTOR, to, value));\n require(success && (data.length == 0 || abi.decode(data, (bool))), 'ValueswapV2: TRANSFER_FAILED');\n }\n\n event Mint(address indexed sender, uint amount0, uint amount1);\n event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);\n event Swap(\n address indexed sender,\n uint amount0In,\n uint amount1In,\n uint amount0Out,\n uint amount1Out,\n address indexed to\n );\n event Sync(uint112 reserve0, uint112 reserve1);\n\n constructor() public {\n factory = msg.sender;\n }\n\n // called once by the factory at time of deployment\n function initialize(address _token0, address _token1) external {\n require(msg.sender == factory, 'ValueswapV2: FORBIDDEN'); // sufficient check\n token0 = _token0;\n token1 = _token1;\n }\n\n // update reserves and, on the first call per block, price accumulators\n function _update(uint balance0, uint balance1, uint112 _reserve0, uint112 _reserve1) private {\n require(balance0 <= uint112(-1) && balance1 <= uint112(-1), 'ValueswapV2: OVERFLOW');\n uint32 blockTimestamp = uint32(block.timestamp % 2**32);\n uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired\n if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {\n // * never overflows, and + overflow is desired\n price0CumulativeLast += uint(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) * timeElapsed;\n price1CumulativeLast += uint(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) * timeElapsed;\n }\n reserve0 = uint112(balance0);\n reserve1 = uint112(balance1);\n blockTimestampLast = blockTimestamp;\n emit Sync(reserve0, reserve1);\n }\n\n // if fee is on, mint liquidity equivalent to 1/6th of the growth in sqrt(k)\n function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) {\n address feeTo = IValueswapV2Factory(factory).feeTo();\n feeOn = feeTo != address(0);\n uint _kLast = kLast; // gas savings\n if (feeOn) {\n if (_kLast != 0) {\n uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1));\n uint rootKLast = Math.sqrt(_kLast);\n if (rootK > rootKLast) {\n uint numerator = totalSupply.mul(rootK.sub(rootKLast));\n uint denominator = rootK.mul(5).add(rootKLast);\n uint liquidity = numerator / denominator;\n if (liquidity > 0) _mint(feeTo, liquidity);\n }\n }\n } else if (_kLast != 0) {\n kLast = 0;\n }\n }\n\n // this low-level function should be called from a contract which performs important safety checks\n function mint(address to) external lock returns (uint liquidity) {\n (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings\n uint balance0 = IERC20(token0).balanceOf(address(this));\n uint balance1 = IERC20(token1).balanceOf(address(this));\n uint amount0 = balance0.sub(_reserve0);\n uint amount1 = balance1.sub(_reserve1);\n\n bool feeOn = _mintFee(_reserve0, _reserve1);\n uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee\n if (_totalSupply == 0) {\n liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);\n _mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens\n } else {\n liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);\n }\n require(liquidity > 0, 'ValueswapV2: INSUFFICIENT_LIQUIDITY_MINTED');\n _mint(to, liquidity);\n\n _update(balance0, balance1, _reserve0, _reserve1);\n if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date\n emit Mint(msg.sender, amount0, amount1);\n }\n\n // this low-level function should be called from a contract which performs important safety checks\n function burn(address to) external lock returns (uint amount0, uint amount1) {\n (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings\n address _token0 = token0; // gas savings\n address _token1 = token1; // gas savings\n uint balance0 = IERC20(_token0).balanceOf(address(this));\n uint balance1 = IERC20(_token1).balanceOf(address(this));\n uint liquidity = balanceOf[address(this)];\n\n bool feeOn = _mintFee(_reserve0, _reserve1);\n uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee\n amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution\n amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution\n require(amount0 > 0 && amount1 > 0, 'ValueswapV2: INSUFFICIENT_LIQUIDITY_BURNED');\n _burn(address(this), liquidity);\n _safeTransfer(_token0, to, amount0);\n _safeTransfer(_token1, to, amount1);\n balance0 = IERC20(_token0).balanceOf(address(this));\n balance1 = IERC20(_token1).balanceOf(address(this));\n\n _update(balance0, balance1, _reserve0, _reserve1);\n if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date\n emit Burn(msg.sender, amount0, amount1, to);\n }\n\n // this low-level function should be called from a contract which performs important safety checks\n function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external lock {\n require(amount0Out > 0 || amount1Out > 0, 'ValueswapV2: INSUFFICIENT_OUTPUT_AMOUNT');\n (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings\n require(amount0Out < _reserve0 && amount1Out < _reserve1, 'ValueswapV2: INSUFFICIENT_LIQUIDITY');\n\n uint balance0;\n uint balance1;\n { // scope for _token{0,1}, avoids stack too deep errors\n address _token0 = token0;\n address _token1 = token1;\n require(to != _token0 && to != _token1, 'ValueswapV2: INVALID_TO');\n if (amount0Out > 0) _safeTransfer(_token0, to, amount0Out); // optimistically transfer tokens\n if (amount1Out > 0) _safeTransfer(_token1, to, amount1Out); // optimistically transfer tokens\n if (data.length > 0) IValueswapV2Callee(to).valueswapV2Call(msg.sender, amount0Out, amount1Out, data);\n balance0 = IERC20(_token0).balanceOf(address(this));\n balance1 = IERC20(_token1).balanceOf(address(this));\n }\n uint amount0In = balance0 > _reserve0 - amount0Out ? balance0 - (_reserve0 - amount0Out) : 0;\n uint amount1In = balance1 > _reserve1 - amount1Out ? balance1 - (_reserve1 - amount1Out) : 0;\n require(amount0In > 0 || amount1In > 0, 'ValueswapV2: INSUFFICIENT_INPUT_AMOUNT');\n { // scope for reserve{0,1}Adjusted, avoids stack too deep errors\n uint balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(3));\n uint balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(3));\n require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(1000**2), 'ValueswapV2: K');\n }\n\n _update(balance0, balance1, _reserve0, _reserve1);\n emit Swap(msg.sender, amount0In, amount1In, amount0Out, amount1Out, to);\n }\n\n // force balances to match reserves\n function skim(address to) external lock {\n address _token0 = token0; // gas savings\n address _token1 = token1; // gas savings\n _safeTransfer(_token0, to, IERC20(_token0).balanceOf(address(this)).sub(reserve0));\n _safeTransfer(_token1, to, IERC20(_token1).balanceOf(address(this)).sub(reserve1));\n }\n\n // force reserves to match balances\n function sync() external lock {\n _update(IERC20(token0).balanceOf(address(this)), IERC20(token1).balanceOf(address(this)), reserve0, reserve1);\n }\n}\n", "sourcePath": "/Users/second/Documents/work/valueswap-v2-core/contracts/ValueswapV2Pair.sol", "ast": { "absolutePath": "/Users/second/Documents/work/valueswap-v2-core/contracts/ValueswapV2Pair.sol", "exportedSymbols": { "ValueswapV2Pair": [ 1653 ] }, "id": 1654, "nodeType": "SourceUnit", "nodes": [ { "id": 614, "literals": [ "solidity", "=", "0.5", ".16" ], "nodeType": "PragmaDirective", "src": "0:24:3" }, { "absolutePath": "/Users/second/Documents/work/valueswap-v2-core/contracts/interfaces/IValueswapV2Pair.sol", "file": "./interfaces/IValueswapV2Pair.sol", "id": 615, "nodeType": "ImportDirective", "scope": 1654, "sourceUnit": 2175, "src": "26:43:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/second/Documents/work/valueswap-v2-core/contracts/ValueswapV2ERC20.sol", "file": "./ValueswapV2ERC20.sol", "id": 616, "nodeType": "ImportDirective", "scope": 1654, "sourceUnit": 418, "src": "70:32:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/second/Documents/work/valueswap-v2-core/contracts/libraries/Math.sol", "file": "./libraries/Math.sol", "id": 617, "nodeType": "ImportDirective", "scope": 1654, "sourceUnit": 2251, "src": "103:30:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/second/Documents/work/valueswap-v2-core/contracts/libraries/UQ112x112.sol", "file": "./libraries/UQ112x112.sol", "id": 618, "nodeType": "ImportDirective", "scope": 1654, "sourceUnit": 2368, "src": "134:35:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/second/Documents/work/valueswap-v2-core/contracts/interfaces/IERC20.sol", "file": "./interfaces/IERC20.sol", "id": 619, "nodeType": "ImportDirective", "scope": 1654, "sourceUnit": 1738, "src": "170:33:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/second/Documents/work/valueswap-v2-core/contracts/interfaces/IValueswapV2Factory.sol", "file": "./interfaces/IValueswapV2Factory.sol", "id": 620, "nodeType": "ImportDirective", "scope": 1654, "sourceUnit": 1933, "src": "204:46:3", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/second/Documents/work/valueswap-v2-core/contracts/interfaces/IValueswapV2Callee.sol", "file": "./interfaces/IValueswapV2Callee.sol", "id": 621, "nodeType": "ImportDirective", "scope": 1654, "sourceUnit": 1752, "src": "251:45:3", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 622, "name": "IValueswapV2Pair", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 2174, "src": "326:16:3", "typeDescriptions": { "typeIdentifier": "t_contract$_IValueswapV2Pair_$2174", "typeString": "contract IValueswapV2Pair" } }, "id": 623, "nodeType": "InheritanceSpecifier", "src": "326:16:3" }, { "arguments": null, "baseName": { "contractScope": null, "id": 624, "name": "ValueswapV2ERC20", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 417, "src": "344:16:3", "typeDescriptions": { "typeIdentifier": "t_contract$_ValueswapV2ERC20_$417", "typeString": "contract ValueswapV2ERC20" } }, "id": 625, "nodeType": "InheritanceSpecifier", "src": "344:16:3" } ], "contractDependencies": [ 417, 1869, 2174 ], "contractKind": "contract", "documentation": null, "fullyImplemented": true, "id": 1653, "linearizedBaseContracts": [ 1653, 417, 1869, 2174 ], "name": "ValueswapV2Pair", "nodeType": "ContractDefinition", "nodes": [ { "id": 628, "libraryName": { "contractScope": null, "id": 626, "name": "SafeMath", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 2325, "src": "373:8:3", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeMath_$2325", "typeString": "library SafeMath" } }, "nodeType": "UsingForDirective", "src": "367:25:3", "typeName": { "id": 627, "name": "uint", "nodeType": "ElementaryTypeName", "src": "387:4:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "id": 631, "libraryName": { "contractScope": null, "id": 629, "name": "UQ112x112", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 2367, "src": "403:9:3", "typeDescriptions": { "typeIdentifier": "t_contract$_UQ112x112_$2367", "typeString": "library UQ112x112" } }, "nodeType": "UsingForDirective", "src": "397:28:3", "typeName": { "id": 630, "name": "uint224", "nodeType": "ElementaryTypeName", "src": "417:7:3", "typeDescriptions": { "typeIdentifier": "t_uint224", "typeString": "uint224" } } }, { "constant": true, "id": 636, "name": "MINIMUM_LIQUIDITY", "nodeType": "VariableDeclaration", "scope": 1653, "src": "431:46:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 632, "name": "uint", "nodeType": "ElementaryTypeName", "src": "431:4:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_rational_1000_by_1", "typeString": "int_const 1000" }, "id": 635, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "hexValue": "3130", "id": 633, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "472:2:3", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_10_by_1", "typeString": "int_const 10" }, "value": "10" }, "nodeType": "BinaryOperation", "operator": "**", "rightExpression": { "argumentTypes": null, "hexValue": "33", "id": 634, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "476:1:3", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_3_by_1", "typeString": "int_const 3" }, "value": "3" }, "src": "472:5:3", "typeDescriptions": { "typeIdentifier": "t_rational_1000_by_1", "typeString": "int_const 1000" } }, "visibility": "public" }, { "constant": true, "id": 645, "name": "SELECTOR", "nodeType": "VariableDeclaration", "scope": 1653, "src": "483:88:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 637, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "483:6:3", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "7472616e7366657228616464726573732c75696e7432353629", "id": 641, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "541:27:3", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_a9059cbb2ab09eb219583f4a59a5d0623ade346d962bcd4e46b11da047c9049b", "typeString": "literal_string \"transfer(address,uint256)\"" }, "value": "transfer(address,uint256)" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_stringliteral_a9059cbb2ab09eb219583f4a59a5d0623ade346d962bcd4e46b11da047c9049b", "typeString": "literal_string \"transfer(address,uint256)\"" } ], "id": 640, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "535:5:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_bytes_storage_ptr_$", "typeString": "type(bytes storage pointer)" }, "typeName": "bytes" }, "id": 642, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "535:34:3", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 639, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2394, "src": "525:9:3", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 643, "isConstant": false, "isLValue": false, "isPure": true, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "525:45:3", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 638, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "518:6:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_bytes4_$", "typeString": "type(bytes4)" }, "typeName": "bytes4" }, "id": 644, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "518:53:3", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "visibility": "private" }, { "constant": false, "id": 647, "name": "factory", "nodeType": "VariableDeclaration", "scope": 1653, "src": "578:22:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 646, "name": "address", "nodeType": "ElementaryTypeName", "src": "578:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "public" }, { "constant": false, "id": 649, "name": "token0", "nodeType": "VariableDeclaration", "scope": 1653, "src": "606:21:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 648, "name": "address", "nodeType": "ElementaryTypeName", "src": "606:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "public" }, { "constant": false, "id": 651, "name": "token1", "nodeType": "VariableDeclaration", "scope": 1653, "src": "633:21:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 650, "name": "address", "nodeType": "ElementaryTypeName", "src": "633:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "public" }, { "constant": false, "id": 653, "name": "reserve0", "nodeType": "VariableDeclaration", "scope": 1653, "src": "661:24:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint112", "typeString": "uint112" }, "typeName": { "id": 652, "name": "uint112", "nodeType": "ElementaryTypeName", "src": "661:7:3", "typeDescriptions": { "typeIdentifier": "t_uint112", "typeString": "uint112" } }, "value": null, "visibility": "private" }, { "constant": false, "id": 655, "name": "reserve1", "nodeType": "VariableDeclaration", "scope": 1653, "src": "757:24:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint112", "typeString": "uint112" }, "typeName": { "id": 654, "name": "uint112", "nodeType": "ElementaryTypeName", "src": "757:7:3", "typeDescriptions": { "typeIdentifier": "t_uint112", "typeString": "uint112" } }, "value": null, "visibility": "private" }, { "constant": false, "id": 657, "name": "blockTimestampLast", "nodeType": "VariableDeclaration", "scope": 1653, "src": "853:34:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint32", "typeString": "uint32" }, "typeName": { "id": 656, "name": "uint32", "nodeType": "ElementaryTypeName", "src": "853:6:3", "typeDescriptions": { "typeIdentifier": "t_uint32", "typeString": "uint32" } }, "value": null, "visibility": "private" }, { "constant": false, "id": 659, "name": "price0CumulativeLast", "nodeType": "VariableDeclaration", "scope": 1653, "src": "950:32:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 658, "name": "uint", "nodeType": "ElementaryTypeName", "src": "950:4:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "public" }, { "constant": false, "id": 661, "name": "price1CumulativeLast", "nodeType": "VariableDeclaration", "scope": 1653, "src": "988:32:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 660, "name": "uint", "nodeType": "ElementaryTypeName", "src": "988:4:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "public" }, { "constant": false, "id": 663, "name": "kLast", "nodeType": "VariableDeclaration", "scope": 1653, "src": "1026:17:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 662, "name": "uint", "nodeType": "ElementaryTypeName", "src": "1026:4:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "public" }, { "constant": false, "id": 666, "name": "unlocked", "nodeType": "VariableDeclaration", "scope": 1653, "src": "1130:25:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 664, "name": "uint", "nodeType": "ElementaryTypeName", "src": "1130:4:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": { "argumentTypes": null, "hexValue": "31", "id": 665, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1154:1:3", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_1_by_1", "typeString": "int_const 1" }, "value": "1" }, "visibility": "private" }, { "body": { "id": 684, "nodeType": "Block", "src": "1177:117:3", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 671, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 669, "name": "unlocked", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 666, "src": "1195:8:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, 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"argumentTypes": null, "id": 1414, "name": "_token0", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1392, "src": "8050:7:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 1415, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1349, "src": "8059:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 1416, "name": "amount0Out", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1345, "src": "8063:10:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1413, "name": "_safeTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 749, "src": "8036:13:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1417, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8036:38:3", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1418, "nodeType": "ExpressionStatement", "src": "8036:38:3" } }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1422, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 1420, "name": "amount1Out", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1347, "src": "8122:10:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 1421, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8135:1:3", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "8122:14:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 1429, "nodeType": "IfStatement", "src": "8118:58:3", "trueBody": { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 1424, "name": "_token1", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1396, "src": "8152:7:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 1425, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1349, "src": "8161:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 1426, "name": "amount1Out", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1347, "src": "8165:10:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 1423, "name": "_safeTransfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 749, "src": "8138:13:3", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 1427, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8138:38:3", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1428, "nodeType": "ExpressionStatement", "src": "8138:38:3" } }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1433, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 1430, "name": "data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1351, "src": "8224:4:3", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } }, "id": 1431, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "8224:11:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 1432, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8238:1:3", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "8224:15:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 1445, "nodeType": "IfStatement", "src": "8220:101:3", "trueBody": { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 1438, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2400, "src": "8280:3:3", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 1439, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "8280:10:3", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 1440, "name": "amount0Out", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1345, "src": "8292:10:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 1441, "name": "amount1Out", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1347, "src": "8304:10:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 1442, "name": "data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1351, "src": "8316:4:3", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } ], "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 1435, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1349, "src": "8260:2:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 1434, "name": "IValueswapV2Callee", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1751, "src": "8241:18:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IValueswapV2Callee_$1751_$", "typeString": "type(contract IValueswapV2Callee)" } }, "id": 1436, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8241:22:3", "typeDescriptions": { "typeIdentifier": "t_contract$_IValueswapV2Callee_$1751", "typeString": "contract IValueswapV2Callee" } }, "id": 1437, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "valueswapV2Call", "nodeType": "MemberAccess", "referencedDeclaration": 1750, "src": "8241:38:3", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_uint256_$_t_uint256_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (address,uint256,uint256,bytes memory) external" } }, "id": 1443, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8241:80:3", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 1444, "nodeType": "ExpressionStatement", "src": "8241:80:3" } }, { "expression": { "argumentTypes": null, "id": 1455, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 1446, "name": "balance0", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1386, "src": "8331:8:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 1452, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2434, "src": "8376:4:3", "typeDescriptions": { "typeIdentifier": "t_contract$_ValueswapV2Pair_$1653", "typeString": "contract ValueswapV2Pair" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_ValueswapV2Pair_$1653", "typeString": "contract ValueswapV2Pair" } ], "id": 1451, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8368:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 1453, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8368:13:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 1448, "name": "_token0", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1392, "src": "8349:7:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 1447, "name": "IERC20", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1737, "src": "8342:6:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IERC20_$1737_$", "typeString": "type(contract IERC20)" } }, "id": 1449, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8342:15:3", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$1737", "typeString": "contract IERC20" } }, "id": 1450, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "balanceOf", "nodeType": "MemberAccess", "referencedDeclaration": 1698, "src": "8342:25:3", "typeDescriptions": { "typeIdentifier": "t_function_external_view$_t_address_$returns$_t_uint256_$", "typeString": "function (address) view external returns (uint256)" } }, "id": 1454, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8342:40:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8331:51:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1456, "nodeType": "ExpressionStatement", "src": "8331:51:3" }, { "expression": { "argumentTypes": null, "id": 1466, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 1457, "name": "balance1", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1389, "src": "8392:8:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 1463, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2434, "src": "8437:4:3", "typeDescriptions": { "typeIdentifier": "t_contract$_ValueswapV2Pair_$1653", "typeString": "contract ValueswapV2Pair" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_ValueswapV2Pair_$1653", "typeString": "contract ValueswapV2Pair" } ], "id": 1462, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "8429:7:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 1464, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8429:13:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 1459, "name": "_token1", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1396, "src": "8410:7:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 1458, "name": "IERC20", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1737, "src": "8403:6:3", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IERC20_$1737_$", "typeString": "type(contract IERC20)" } }, "id": 1460, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8403:15:3", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC20_$1737", "typeString": "contract IERC20" } }, "id": 1461, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "balanceOf", "nodeType": "MemberAccess", "referencedDeclaration": 1698, "src": "8403:25:3", "typeDescriptions": { "typeIdentifier": "t_function_external_view$_t_address_$returns$_t_uint256_$", "typeString": "function (address) view external returns (uint256)" } }, "id": 1465, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8403:40:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8392:51:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 1467, "nodeType": "ExpressionStatement", "src": "8392:51:3" } ] }, { "assignments": [ 1470 ], "declarations": [ { "constant": false, "id": 1470, "name": "amount0In", "nodeType": "VariableDeclaration", "scope": 1576, "src": "8463:14:3", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 1469, "name": "uint", "nodeType": "ElementaryTypeName", "src": "8463:4:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 1484, "initialValue": { "argumentTypes": null, "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1475, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 1471, "name": "balance0", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1386, "src": "8480:8:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1474, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 1472, "name": "_reserve0", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1368, "src": "8491:9:3", "typeDescriptions": { "typeIdentifier": "t_uint112", "typeString": "uint112" } }, "nodeType": "BinaryOperation", "operator": "-", "rightExpression": { "argumentTypes": null, "id": 1473, "name": "amount0Out", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1345, "src": "8503:10:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8491:22:3", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8480:33:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseExpression": { "argumentTypes": null, "hexValue": "30", "id": 1482, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8554:1:3", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "id": 1483, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "Conditional", "src": "8480:75:3", "trueExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 1481, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 1476, "name": "balance0", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1386, "src": "8516:8:3", "typeDescriptions": { "typeIdentifier": 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