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"typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 5699, "name": "_transfer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5619, "src": "7726:9:25", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$", "typeString": "function (address,address,uint256)" } }, "id": 5703, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7726:26:25", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 5704, "nodeType": "ExpressionStatement", "src": "7726:26:25" }, { "expression": { "argumentTypes": null, "hexValue": "74727565", "id": 5705, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "7765:4:25", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 5667, "id": 5706, "nodeType": "Return", "src": "7758:11:25" } ] }, "documentation": null, "functionSelector": "23b872dd", "id": 5708, "implemented": true, "kind": "function", "modifiers": [], "name": "transferFrom", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 5664, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5659, "mutability": "mutable", "name": "from", "nodeType": "VariableDeclaration", "overrides": null, "scope": 5708, "src": "7514:12:25", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5658, "name": "address", "nodeType": "ElementaryTypeName", "src": "7514:7:25", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 5661, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "overrides": null, "scope": 5708, "src": "7532:10:25", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5660, "name": "address", "nodeType": "ElementaryTypeName", "src": "7532:7:25", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 5663, "mutability": "mutable", "name": "value", "nodeType": "VariableDeclaration", "overrides": null, "scope": 5708, "src": "7548:10:25", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 5662, "name": "uint", "nodeType": "ElementaryTypeName", "src": "7548:4:25", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "7508:54:25" }, "returnParameters": { "id": 5667, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5666, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 5708, "src": "7581:4:25", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 5665, "name": "bool", "nodeType": "ElementaryTypeName", "src": "7581:4:25", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "7580:6:25" }, "scope": 5788, "src": "7487:287:25", "stateMutability": "nonpayable", "virtual": false, "visibility": "external" }, { "body": { "id": 5786, "nodeType": "Block", "src": "7925:521:25", "statements": [ { "expression": { 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"referencedDeclaration": null, "src": "7951:15:25", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "7939:27:25", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "556e697377617056323a2045585049524544", "id": 5730, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7968:20:25", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_47797eaaf6df6dc2efdb1e824209400a8293aff4c1e7f6d90fcc4b3e3ba18a87", "typeString": "literal_string \"UniswapV2: EXPIRED\"" }, "value": "UniswapV2: EXPIRED" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_47797eaaf6df6dc2efdb1e824209400a8293aff4c1e7f6d90fcc4b3e3ba18a87", "typeString": "literal_string \"UniswapV2: EXPIRED\"" } ], "id": 5725, "name": "require", "nodeType": 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"name": "bytes32", "nodeType": "ElementaryTypeName", "src": "7995:7:25", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 5756, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "1901", "id": 5738, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "8065:10:25", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_301a50b291d33ce1e8e9064e3f6a6c51d902ec22892b50d58abf6357c6a45541", "typeString": "literal_string \"\u0019\u0001\"" }, "value": "\u0019\u0001" }, { "argumentTypes": null, "id": 5739, "name": "DOMAIN_SEPARATOR", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5428, "src": "8087:16:25", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 5743, "name": "PERMIT_TYPEHASH", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5431, "src": "8136:15:25", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 5744, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5710, "src": "8153:5:25", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 5745, "name": "spender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5712, "src": "8160:7:25", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 5746, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5714, "src": "8169:5:25", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 5750, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "++", "prefix": false, "src": "8176:15:25", "subExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 5747, "name": "nonces", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5435, "src": "8176:6:25", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$", "typeString": "mapping(address => uint256)" } }, "id": 5749, "indexExpression": { "argumentTypes": null, "id": 5748, "name": "owner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5710, "src": "8183:5:25", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "8176:13:25", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 5751, "name": "deadline", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5716, "src": "8193:8:25", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "id": 5741, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "8125:3:25", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 5742, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encode", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "8125:10:25", "typeDescriptions": { "typeIdentifier": "t_function_abiencode_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 5752, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8125:77:25", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 5740, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -8, "src": "8115:9:25", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 5753, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8115:88:25", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_stringliteral_301a50b291d33ce1e8e9064e3f6a6c51d902ec22892b50d58abf6357c6a45541", "typeString": "literal_string \"\u0019\u0001\"" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "expression": { "argumentTypes": null, "id": 5736, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "8037:3:25", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 5737, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodePacked", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "8037:16:25", "typeDescriptions": { "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 5754, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8037:176:25", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 5735, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -8, "src": "8018:9:25", "typeDescriptions": { "typeIdentifier": 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"typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 6481, "name": "_token0", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 6379, "src": "14878:7:25", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 6480, "name": "MockUniswapV2FactoryIERC20", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5390, "src": "14851:26:25", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_MockUniswapV2FactoryIERC20_$5390_$", "typeString": "type(contract MockUniswapV2FactoryIERC20)" } }, "id": 6482, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, 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6520, "nodeType": "ExpressionStatement", "src": "15061:36:25" } }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 6523, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -15, "src": "15153:3:25", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 6524, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "15153:10:25", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 6525, "name": "amount0", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 6367, "src": "15165:7:25", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 6526, "name": 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"16190:10:25", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, { "argumentTypes": null, "id": 6628, "name": "amount0Out", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 6533, "src": "16202:10:25", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 6629, "name": "amount1Out", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 6535, "src": "16214:10:25", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 6630, "name": "data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 6539, "src": "16226:4:25", "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": 6623, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 6537, "src": "16172:2:25", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 6622, "name": "IUniswapV2Callee", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5402, "src": "16155:16:25", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IUniswapV2Callee_$5402_$", "typeString": "type(contract IUniswapV2Callee)" } }, "id": 6624, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": 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"t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 6651, "name": "address", "nodeType": "ElementaryTypeName", "src": "16375:7:25", "typeDescriptions": { "typeIdentifier": null, "typeString": null } } }, "id": 6654, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "16375:13:25", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 6648, "name": "_token1", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 6584, "src": "16356:7:25", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": 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"20781:372:25" } ], "src": "0:21154:25" }, "bytecode": "", "bytecodeSha1": "da39a3ee5e6b4b0d3255bfef95601890afd80709", "compiler": { "evm_version": "istanbul", "optimizer": { "enabled": true, "runs": 200 }, "version": "0.6.12+commit.27d51765" }, "contractName": "MockUniswapV2FactoryIUniswapV2Pair", "coverageMap": { "branches": {}, "statements": {} }, "dependencies": [], "deployedBytecode": "", "deployedSourceMap": "", "language": "Solidity", "natspec": { "kind": "dev", "methods": {}, "version": 1 }, "offset": [ 667, 3116 ], "opcodes": "", "pcMap": {}, "sha1": "cd16f0aaabbf6cd1b7977ef35a463bf5dced33ef", "source": "pragma solidity 0.6.12;\n\ninterface MockUniswapV2FactoryIUniswapV2Factory {\n event PairCreated(address indexed token0, address indexed token1, address pair, uint);\n\n function feeTo() external view returns (address);\n\n function feeToSetter() external view returns (address);\n\n function getPair(address tokenA, address tokenB) external view returns (address pair);\n\n function allPairs(uint) external view returns (address pair);\n\n function allPairsLength() external view returns (uint);\n\n function createPair(address tokenA, address tokenB) external returns (address pair);\n\n function setFeeTo(address) external;\n\n function setFeeToSetter(address) external;\n}\n\ninterface MockUniswapV2FactoryIUniswapV2Pair {\n event Approval(address indexed owner, address indexed spender, uint value);\n event Transfer(address indexed from, address indexed to, uint value);\n\n function name() external pure returns (string memory);\n\n function symbol() external pure returns (string memory);\n\n function decimals() external pure returns (uint8);\n\n function totalSupply() external view returns (uint);\n\n function balanceOf(address owner) external view returns (uint);\n\n function allowance(address owner, address spender) external view returns (uint);\n\n function approve(address spender, uint value) external returns (bool);\n\n function transfer(address to, uint value) external returns (bool);\n\n function transferFrom(\n address from,\n address to,\n uint value\n ) external returns (bool);\n\n function DOMAIN_SEPARATOR() external view returns (bytes32);\n\n function PERMIT_TYPEHASH() external pure returns (bytes32);\n\n function nonces(address owner) external view returns (uint);\n\n function permit(\n address owner,\n address spender,\n uint value,\n uint deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) external;\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 function MINIMUM_LIQUIDITY() external pure returns (uint);\n\n function factory() external view returns (address);\n\n function token0() external view returns (address);\n\n function token1() external view returns (address);\n\n function getReserves()\n external\n view\n returns (\n uint112 reserve0,\n uint112 reserve1,\n uint32 blockTimestampLast\n );\n\n function price0CumulativeLast() external view returns (uint);\n\n function price1CumulativeLast() external view returns (uint);\n\n function kLast() external view returns (uint);\n\n function mint(address to) external returns (uint liquidity);\n\n function burn(address to) external returns (uint amount0, uint amount1);\n\n function swap(\n uint amount0Out,\n uint amount1Out,\n address to,\n bytes calldata data\n ) external;\n\n function skim(address to) external;\n\n function sync() external;\n\n function initialize(address, address) external;\n}\n\ninterface MockUniswapV2FactoryIUniswapV2ERC20 {\n event Approval(address indexed owner, address indexed spender, uint value);\n event Transfer(address indexed from, address indexed to, uint value);\n\n function name() external pure returns (string memory);\n\n function symbol() external pure returns (string memory);\n\n function decimals() external pure returns (uint8);\n\n function totalSupply() external view returns (uint);\n\n function balanceOf(address owner) external view returns (uint);\n\n function allowance(address owner, address spender) external view returns (uint);\n\n function approve(address spender, uint value) external returns (bool);\n\n function transfer(address to, uint value) external returns (bool);\n\n function transferFrom(\n address from,\n address to,\n uint value\n ) external returns (bool);\n\n function DOMAIN_SEPARATOR() external view returns (bytes32);\n\n function PERMIT_TYPEHASH() external pure returns (bytes32);\n\n function nonces(address owner) external view returns (uint);\n\n function permit(\n address owner,\n address spender,\n uint value,\n uint deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) external;\n}\n\ninterface MockUniswapV2FactoryIERC20 {\n event Approval(address indexed owner, address indexed spender, uint value);\n event Transfer(address indexed from, address indexed to, uint value);\n\n function name() external view returns (string memory);\n\n function symbol() external view returns (string memory);\n\n function decimals() external view returns (uint8);\n\n function totalSupply() external view returns (uint);\n\n function balanceOf(address owner) external view returns (uint);\n\n function allowance(address owner, address spender) external view returns (uint);\n\n function approve(address spender, uint value) external returns (bool);\n\n function transfer(address to, uint value) external returns (bool);\n\n function transferFrom(\n address from,\n address to,\n uint value\n ) external returns (bool);\n}\n\ninterface IUniswapV2Callee {\n function uniswapV2Call(\n address sender,\n uint amount0,\n uint amount1,\n bytes calldata data\n ) external;\n}\n\ncontract UniswapV2ERC20 {\n using MockUniswapV2FactorySafeMath for uint;\n\n string public constant name = 'Uniswap V2';\n string public constant symbol = 'UNI-V2';\n uint8 public constant decimals = 18;\n uint public totalSupply;\n mapping(address => uint) public balanceOf;\n mapping(address => mapping(address => uint)) public allowance;\n\n bytes32 public DOMAIN_SEPARATOR;\n // keccak256(\"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)\");\n bytes32 public constant PERMIT_TYPEHASH =\n 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;\n mapping(address => uint) public nonces;\n\n event Approval(address indexed owner, address indexed spender, uint value);\n event Transfer(address indexed from, address indexed to, uint value);\n\n constructor() public {\n uint chainId;\n assembly {\n chainId := chainid()\n }\n DOMAIN_SEPARATOR = keccak256(\n abi.encode(\n keccak256(\n 'EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'\n ),\n keccak256(bytes(name)),\n keccak256(bytes('1')),\n chainId,\n address(this)\n )\n );\n }\n\n function _mint(address to, uint value) internal {\n totalSupply = totalSupply.add(value);\n balanceOf[to] = balanceOf[to].add(value);\n emit Transfer(address(0), to, value);\n }\n\n function _burn(address from, uint value) internal {\n balanceOf[from] = balanceOf[from].sub(value);\n totalSupply = totalSupply.sub(value);\n emit Transfer(from, address(0), value);\n }\n\n function _approve(\n address owner,\n address spender,\n uint value\n ) private {\n allowance[owner][spender] = value;\n emit Approval(owner, spender, value);\n }\n\n function _transfer(\n address from,\n address to,\n uint value\n ) private {\n balanceOf[from] = balanceOf[from].sub(value);\n balanceOf[to] = balanceOf[to].add(value);\n emit Transfer(from, to, value);\n }\n\n function approve(address spender, uint value) external returns (bool) {\n _approve(msg.sender, spender, value);\n return true;\n }\n\n function transfer(address to, uint value) external returns (bool) {\n _transfer(msg.sender, to, value);\n return true;\n }\n\n function transferFrom(\n address from,\n address to,\n uint value\n ) external returns (bool) {\n if (allowance[from][msg.sender] != uint(-1)) {\n allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);\n }\n _transfer(from, to, value);\n return true;\n }\n\n function permit(\n address owner,\n address spender,\n uint value,\n uint deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) external {\n require(deadline >= block.timestamp, 'UniswapV2: EXPIRED');\n bytes32 digest =\n keccak256(\n abi.encodePacked(\n '\\x19\\x01',\n DOMAIN_SEPARATOR,\n keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))\n )\n );\n address recoveredAddress = ecrecover(digest, v, r, s);\n require(\n recoveredAddress != address(0) && recoveredAddress == owner,\n 'UniswapV2: INVALID_SIGNATURE'\n );\n _approve(owner, spender, value);\n }\n}\n\ncontract MockUniswapV2FactoryUniswapV2Pair is UniswapV2ERC20 {\n using MockUniswapV2FactorySafeMath 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, 'UniswapV2: LOCKED');\n unlocked = 0;\n _;\n unlocked = 1;\n }\n\n function getReserves()\n public\n view\n returns (\n uint112 _reserve0,\n uint112 _reserve1,\n uint32 _blockTimestampLast\n )\n {\n _reserve0 = reserve0;\n _reserve1 = reserve1;\n _blockTimestampLast = blockTimestampLast;\n }\n\n function _safeTransfer(\n address token,\n address to,\n uint value\n ) private {\n (bool success, bytes memory data) = token.call(abi.encodeWithSelector(SELECTOR, to, value));\n require(\n success && (data.length == 0 || abi.decode(data, (bool))),\n 'UniswapV2: TRANSFER_FAILED'\n );\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, 'UniswapV2: 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(\n uint balance0,\n uint balance1,\n uint112 _reserve0,\n uint112 _reserve1\n ) private {\n require(balance0 <= uint112(-1) && balance1 <= uint112(-1), 'UniswapV2: 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 = MockUniswapV2FactoryIUniswapV2Factory(factory).feeTo();\n feeOn = feeTo != address(0);\n uint _kLast = kLast; // gas savings\n if (feeOn) {\n if (_kLast != 0) {\n uint rootK = MockUniswapV2FactoryMah.sqrt(uint(_reserve0).mul(_reserve1));\n uint rootKLast = MockUniswapV2FactoryMah.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 = MockUniswapV2FactoryIERC20(token0).balanceOf(address(this));\n uint balance1 = MockUniswapV2FactoryIERC20(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 = MockUniswapV2FactoryMah.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);\n _mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens\n } else {\n liquidity = MockUniswapV2FactoryMah.min(\n amount0.mul(_totalSupply) / _reserve0,\n amount1.mul(_totalSupply) / _reserve1\n );\n }\n require(liquidity > 0, 'UniswapV2: 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 = MockUniswapV2FactoryIERC20(_token0).balanceOf(address(this));\n uint balance1 = MockUniswapV2FactoryIERC20(_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, 'UniswapV2: INSUFFICIENT_LIQUIDITY_BURNED');\n _burn(address(this), liquidity);\n _safeTransfer(_token0, to, amount0);\n _safeTransfer(_token1, to, amount1);\n balance0 = MockUniswapV2FactoryIERC20(_token0).balanceOf(address(this));\n balance1 = MockUniswapV2FactoryIERC20(_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(\n uint amount0Out,\n uint amount1Out,\n address to,\n bytes calldata data\n ) external lock {\n require(amount0Out > 0 || amount1Out > 0, 'UniswapV2: INSUFFICIENT_OUTPUT_AMOUNT');\n (uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings\n require(amount0Out < _reserve0 && amount1Out < _reserve1, 'UniswapV2: INSUFFICIENT_LIQUIDITY');\n\n uint balance0;\n uint balance1;\n {\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, 'UniswapV2: 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)\n IUniswapV2Callee(to).uniswapV2Call(msg.sender, amount0Out, amount1Out, data);\n balance0 = MockUniswapV2FactoryIERC20(_token0).balanceOf(address(this));\n balance1 = MockUniswapV2FactoryIERC20(_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, 'UniswapV2: INSUFFICIENT_INPUT_AMOUNT');\n {\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(\n balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(1000**2),\n 'UniswapV2: K'\n );\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(\n _token0,\n to,\n MockUniswapV2FactoryIERC20(_token0).balanceOf(address(this)).sub(reserve0)\n );\n _safeTransfer(\n _token1,\n to,\n MockUniswapV2FactoryIERC20(_token1).balanceOf(address(this)).sub(reserve1)\n );\n }\n\n // force reserves to match balances\n function sync() external lock {\n _update(\n MockUniswapV2FactoryIERC20(token0).balanceOf(address(this)),\n MockUniswapV2FactoryIERC20(token1).balanceOf(address(this)),\n reserve0,\n reserve1\n );\n }\n}\n\ncontract MockUniswapV2Factory {\n address public feeTo;\n address public feeToSetter;\n\n mapping(address => mapping(address => address)) public getPair;\n address[] public allPairs;\n\n event PairCreated(address indexed token0, address indexed token1, address pair, uint);\n\n constructor(address _feeToSetter) public {\n feeToSetter = _feeToSetter;\n }\n\n function allPairsLength() external view returns (uint) {\n return allPairs.length;\n }\n\n function createPair(address tokenA, address tokenB) external returns (address pair) {\n require(tokenA != tokenB, 'UniswapV2: IDENTICAL_ADDRESSES');\n (address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);\n require(token0 != address(0), 'UniswapV2: ZERO_ADDRESS');\n require(getPair[token0][token1] == address(0), 'UniswapV2: PAIR_EXISTS'); // single check is sufficient\n bytes memory bytecode = type(MockUniswapV2FactoryUniswapV2Pair).creationCode;\n bytes32 salt = keccak256(abi.encodePacked(token0, token1));\n assembly {\n pair := create2(0, add(bytecode, 32), mload(bytecode), salt)\n }\n MockUniswapV2FactoryIUniswapV2Pair(pair).initialize(token0, token1);\n getPair[token0][token1] = pair;\n getPair[token1][token0] = pair; // populate mapping in the reverse direction\n allPairs.push(pair);\n emit PairCreated(token0, token1, pair, allPairs.length);\n }\n\n function setFeeTo(address _feeTo) external {\n require(msg.sender == feeToSetter, 'UniswapV2: FORBIDDEN');\n feeTo = _feeTo;\n }\n\n function setFeeToSetter(address _feeToSetter) external {\n require(msg.sender == feeToSetter, 'UniswapV2: FORBIDDEN');\n feeToSetter = _feeToSetter;\n }\n}\n\n// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)\n\nlibrary MockUniswapV2FactorySafeMath {\n function add(uint x, uint y) internal pure returns (uint z) {\n require((z = x + y) >= x, 'ds-math-add-overflow');\n }\n\n function sub(uint x, uint y) internal pure returns (uint z) {\n require((z = x - y) <= x, 'ds-math-sub-underflow');\n }\n\n function mul(uint x, uint y) internal pure returns (uint z) {\n require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');\n }\n}\n\n// a library for performing various math operations\n\nlibrary MockUniswapV2FactoryMah {\n function min(uint x, uint y) internal pure returns (uint z) {\n z = x < y ? x : y;\n }\n\n // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)\n function sqrt(uint y) internal pure returns (uint z) {\n if (y > 3) {\n z = y;\n uint x = y / 2 + 1;\n while (x < z) {\n z = x;\n x = (y / x + x) / 2;\n }\n } else if (y != 0) {\n z = 1;\n }\n }\n}\n\n// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))\n\n// range: [0, 2**112 - 1]\n// resolution: 1 / 2**112\n\nlibrary UQ112x112 {\n uint224 constant Q112 = 2**112;\n\n // encode a uint112 as a UQ112x112\n function encode(uint112 y) internal pure returns (uint224 z) {\n z = uint224(y) * Q112; // never overflows\n }\n\n // divide a UQ112x112 by a uint112, returning a UQ112x112\n function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {\n z = x / uint224(y);\n }\n}\n", "sourceMap": "", "sourcePath": "contracts/mock/MockUniswapV2Factory.sol", "type": "interface" }