{ "contractName": "MoonwalkerswapV2Migrator", "abi": [ { "inputs": [ { "internalType": "address", "name": "_factoryV1", "type": "address" }, { "internalType": "address", "name": "_router", "type": "address" } ], "stateMutability": "nonpayable", "type": "constructor" }, { "stateMutability": "payable", "type": "receive" }, { "inputs": [ { "internalType": "address", "name": "token", "type": "address" }, { "internalType": "uint256", "name": "amountTokenMin", "type": "uint256" }, { "internalType": "uint256", "name": "amountETHMin", "type": "uint256" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "deadline", "type": "uint256" } ], "name": "migrate", "outputs": [], "stateMutability": "nonpayable", "type": "function" } ], "metadata": 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"source": "pragma solidity =0.6.6;\n\nimport 'moonwalkerswap-libraries/contracts/libraries/TransferHelper.sol';\n\nimport './interfaces/IMoonwalkerswapV2Migrator.sol';\nimport './interfaces/V1/IMoonwalkerswapV1Factory.sol';\nimport './interfaces/V1/IMoonwalkerswapV1Exchange.sol';\nimport './interfaces/IMoonwalkerswapV2Router01.sol';\nimport './interfaces/IERC20.sol';\n\ncontract MoonwalkerswapV2Migrator is IMoonwalkerswapV2Migrator {\n IMoonwalkerswapV1Factory immutable factoryV1;\n IMoonwalkerswapV2Router01 immutable router;\n\n constructor(address _factoryV1, address _router) public {\n factoryV1 = IMoonwalkerswapV1Factory(_factoryV1);\n router = IMoonwalkerswapV2Router01(_router);\n }\n\n receive() external payable {}\n\n function migrate(address token, uint amountTokenMin, uint amountETHMin, address to, uint deadline)\n external\n override\n {\n IMoonwalkerswapV1Exchange exchangeV1 = IMoonwalkerswapV1Exchange(factoryV1.getExchange(token));\n uint liquidityV1 = exchangeV1.balanceOf(msg.sender);\n require(exchangeV1.transferFrom(msg.sender, address(this), liquidityV1), 'TRANSFER_FROM_FAILED');\n (uint amountETHV1, uint amountTokenV1) = exchangeV1.removeLiquidity(liquidityV1, 1, 1, uint(-1));\n TransferHelper.safeApprove(token, address(router), amountTokenV1);\n (uint amountTokenV2, uint amountETHV2,) = router.addLiquidityETH{value: amountETHV1}(\n token,\n amountTokenV1,\n amountTokenMin,\n amountETHMin,\n to,\n deadline\n );\n if (amountTokenV1 > amountTokenV2) {\n TransferHelper.safeApprove(token, address(router), 0); // be a good blockchain citizen, reset allowance to 0\n TransferHelper.safeTransfer(token, msg.sender, amountTokenV1 - amountTokenV2);\n } else if (amountETHV1 > amountETHV2) {\n // addLiquidityETH guarantees that all of amountETHV1 or amountTokenV1 will be used, hence this else is safe\n TransferHelper.safeTransferETH(msg.sender, amountETHV1 - amountETHV2);\n }\n }\n}\n", "sourcePath": "/Users/warrenmason/Documents/UniswapV3Contracts/Core/LiveContracts/Moonwalkerswap-v2-periphery/contracts/MoonwalkerswapV2Migrator.sol", "ast": { "absolutePath": "/Users/warrenmason/Documents/UniswapV3Contracts/Core/LiveContracts/Moonwalkerswap-v2-periphery/contracts/MoonwalkerswapV2Migrator.sol", "exportedSymbols": { "MoonwalkerswapV2Migrator": [ 169 ] }, "id": 170, "nodeType": "SourceUnit", "nodes": [ { "id": 1, "literals": [ "solidity", "=", "0.6", ".6" ], "nodeType": "PragmaDirective", "src": "0:23:0" }, { "absolutePath": "moonwalkerswap-libraries/contracts/libraries/TransferHelper.sol", "file": "moonwalkerswap-libraries/contracts/libraries/TransferHelper.sol", "id": 2, "nodeType": "ImportDirective", "scope": 170, "sourceUnit": 804, "src": "25:73:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/warrenmason/Documents/UniswapV3Contracts/Core/LiveContracts/Moonwalkerswap-v2-periphery/contracts/interfaces/IMoonwalkerswapV2Migrator.sol", "file": "./interfaces/IMoonwalkerswapV2Migrator.sol", "id": 3, "nodeType": "ImportDirective", "scope": 170, "sourceUnit": 270, "src": "100:52:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/warrenmason/Documents/UniswapV3Contracts/Core/LiveContracts/Moonwalkerswap-v2-periphery/contracts/interfaces/V1/IMoonwalkerswapV1Factory.sol", "file": "./interfaces/V1/IMoonwalkerswapV1Factory.sol", "id": 4, "nodeType": "ImportDirective", "scope": 170, "sourceUnit": 644, "src": "153:54:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/warrenmason/Documents/UniswapV3Contracts/Core/LiveContracts/Moonwalkerswap-v2-periphery/contracts/interfaces/V1/IMoonwalkerswapV1Exchange.sol", "file": "./interfaces/V1/IMoonwalkerswapV1Exchange.sol", "id": 5, "nodeType": "ImportDirective", "scope": 170, "sourceUnit": 634, "src": "208:55:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/warrenmason/Documents/UniswapV3Contracts/Core/LiveContracts/Moonwalkerswap-v2-periphery/contracts/interfaces/IMoonwalkerswapV2Router01.sol", "file": "./interfaces/IMoonwalkerswapV2Router01.sol", "id": 6, "nodeType": "ImportDirective", "scope": 170, "sourceUnit": 578, "src": "264:52:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/warrenmason/Documents/UniswapV3Contracts/Core/LiveContracts/Moonwalkerswap-v2-periphery/contracts/interfaces/IERC20.sol", "file": "./interfaces/IERC20.sol", "id": 7, "nodeType": "ImportDirective", "scope": 170, "sourceUnit": 254, "src": "317:33:0", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 8, "name": "IMoonwalkerswapV2Migrator", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 269, "src": "389:25:0", "typeDescriptions": { "typeIdentifier": "t_contract$_IMoonwalkerswapV2Migrator_$269", "typeString": "contract IMoonwalkerswapV2Migrator" } }, "id": 9, "nodeType": "InheritanceSpecifier", "src": "389:25:0" } ], "contractDependencies": [ 269 ], "contractKind": "contract", "documentation": null, "fullyImplemented": true, "id": 169, "linearizedBaseContracts": [ 169, 269 ], "name": "MoonwalkerswapV2Migrator", "nodeType": "ContractDefinition", "nodes": [ { "constant": false, "id": 11, "mutability": "immutable", "name": "factoryV1", "nodeType": "VariableDeclaration", "overrides": null, "scope": 169, "src": "421:44:0", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IMoonwalkerswapV1Factory_$643", "typeString": "contract IMoonwalkerswapV1Factory" }, "typeName": { "contractScope": null, "id": 10, "name": "IMoonwalkerswapV1Factory", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 643, "src": "421:24:0", "typeDescriptions": { "typeIdentifier": "t_contract$_IMoonwalkerswapV1Factory_$643", "typeString": "contract IMoonwalkerswapV1Factory" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 13, "mutability": "immutable", "name": "router", "nodeType": "VariableDeclaration", "overrides": null, "scope": 169, "src": "471:42:0", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IMoonwalkerswapV2Router01_$577", "typeString": "contract IMoonwalkerswapV2Router01" }, "typeName": { "contractScope": null, "id": 12, "name": "IMoonwalkerswapV2Router01", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 577, "src": "471:25:0", "typeDescriptions": { "typeIdentifier": "t_contract$_IMoonwalkerswapV2Router01_$577", "typeString": "contract IMoonwalkerswapV2Router01" } }, "value": null, "visibility": "internal" }, { "body": { "id": 32, "nodeType": "Block", "src": "576:118:0", "statements": [ { "expression": { "argumentTypes": null, "id": 24, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, 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