{ "contractName": "TransferHelper", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.6.6+commit.6c089d02\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"methods\":{}},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"moonwalkerswap-libraries/contracts/libraries/TransferHelper.sol\":\"TransferHelper\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"moonwalkerswap-libraries/contracts/libraries/TransferHelper.sol\":{\"keccak256\":\"0xaff99b54915f57e2a4e71b8d15afd4ee425410e5a6f45c07517ae1beb806f8bd\",\"urls\":[\"bzz-raw://15432ec031f4cfa6709921289e198b030a0c5eac75b5a3e0eb64827a2b3b5595\",\"dweb:/ipfs/QmZvR1KuuDvuzXFiADCngTKyMCTy31uhq9U6CazP59B55j\"]}},\"version\":1}", "bytecode": "0x60566023600b82828239805160001a607314601657fe5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220268139bf019be62c4a6efa02a6ab22bebd155f7428d564f4a4a74d64e4202aec64736f6c63430006060033", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220268139bf019be62c4a6efa02a6ab22bebd155f7428d564f4a4a74d64e4202aec64736f6c63430006060033", "immutableReferences": {}, "sourceMap": "183:1621:22:-:0;;132:2:-1;166:7;155:9;146:7;137:37;255:7;249:14;246:1;241:23;235:4;232:33;222:2;;269:9;222:2;293:9;290:1;283:20;323:4;314:7;306:22;347:7;338;331:24", "deployedSourceMap": "183:1621:22:-:0;;;;;;12:1:-1;9;2:12", "source": "// SPDX-License-Identifier: GPL-3.0-or-later\n\npragma solidity >=0.6.0;\n\n// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false\nlibrary TransferHelper {\n function safeApprove(\n address token,\n address to,\n uint256 value\n ) internal {\n // bytes4(keccak256(bytes('approve(address,uint256)')));\n (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));\n require(\n success && (data.length == 0 || abi.decode(data, (bool))),\n 'TransferHelper::safeApprove: approve failed'\n );\n }\n\n function safeTransfer(\n address token,\n address to,\n uint256 value\n ) internal {\n // bytes4(keccak256(bytes('transfer(address,uint256)')));\n (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));\n require(\n success && (data.length == 0 || abi.decode(data, (bool))),\n 'TransferHelper::safeTransfer: transfer failed'\n );\n }\n\n function safeTransferFrom(\n address token,\n address from,\n address to,\n uint256 value\n ) internal {\n // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));\n (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));\n require(\n success && (data.length == 0 || abi.decode(data, (bool))),\n 'TransferHelper::transferFrom: transferFrom failed'\n );\n }\n\n function safeTransferETH(address to, uint256 value) internal {\n (bool success, ) = to.call{value: value}(new bytes(0));\n require(success, 'TransferHelper::safeTransferETH: ETH transfer failed');\n }\n}\n", "sourcePath": "moonwalkerswap-libraries/contracts/libraries/TransferHelper.sol", "ast": { "absolutePath": "moonwalkerswap-libraries/contracts/libraries/TransferHelper.sol", "exportedSymbols": { "TransferHelper": [ 8239 ] }, "id": 8240, "nodeType": "SourceUnit", "nodes": [ { "id": 8081, "literals": [ "solidity", ">=", "0.6", ".0" ], "nodeType": "PragmaDirective", "src": "46:24:22" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": null, "fullyImplemented": true, "id": 8239, "linearizedBaseContracts": [ 8239 ], "name": "TransferHelper", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 8123, 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"referencedDeclaration": 8087, "src": "475:5:22", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_157198259_by_1", "typeString": "int_const 157198259" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "id": 8096, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "436:3:22", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 8097, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "436:22:22", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure 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