@valueswap/v2-periphery

{ "contractName": "TransferHelper", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.6.6+commit.6c089d02\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"methods\":{}},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"@valueswap/lib/contracts/libraries/TransferHelper.sol\":\"TransferHelper\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":999999},\"remappings\":[]},\"sources\":{\"@valueswap/lib/contracts/libraries/TransferHelper.sol\":{\"keccak256\":\"0xaff99b54915f57e2a4e71b8d15afd4ee425410e5a6f45c07517ae1beb806f8bd\",\"urls\":[\"bzz-raw://15432ec031f4cfa6709921289e198b030a0c5eac75b5a3e0eb64827a2b3b5595\",\"dweb:/ipfs/QmZvR1KuuDvuzXFiADCngTKyMCTy31uhq9U6CazP59B55j\"]}},\"version\":1}", "bytecode": "0x60566023600b82828239805160001a607314601657fe5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220ef25f37807e0cd8ef1a8c98c0731ddef0719474ef544b15cd2fe6cbd3db2ab8364736f6c63430006060033", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220ef25f37807e0cd8ef1a8c98c0731ddef0719474ef544b15cd2fe6cbd3db2ab8364736f6c63430006060033", "immutableReferences": {}, "sourceMap": "183:1621:26:-: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": "183:1621:26:-: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": "@valueswap/lib/contracts/libraries/TransferHelper.sol", "ast": { "absolutePath": "@valueswap/lib/contracts/libraries/TransferHelper.sol", "exportedSymbols": { "TransferHelper": [ 9039 ] }, "id": 9040, "nodeType": "SourceUnit", "nodes": [ { "id": 8881, "literals": [ "solidity", ">=", "0.6", ".0" ], "nodeType": "PragmaDirective", "src": "46:24:26" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": null, "fullyImplemented": true, "id": 9039, "linearizedBaseContracts": [ 9039 ], "name": "TransferHelper", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 8923, "nodeType": "Block", "src": "314:332:26", "statements": [ { "assignments": [ 8891, 8893 ], "declarations": [ { "constant": false, "id": 8891, "mutability": "mutable", "name": "success", "nodeType": "VariableDeclaration", "overrides": null, "scope": 8923, "src": "390:12:26", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 8890, "name": "bool", "nodeType": "ElementaryTypeName", "src": "390:4:26", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 8893, "mutability": "mutable", "name": "data", "nodeType": "VariableDeclaration", "overrides": null, "scope": 8923, "src": "404:17:26", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 8892, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "404:5:26", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "id": 8903, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30783039356561376233", "id": 8898, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "459:10:26", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_157198259_by_1", "typeString": "int_const 157198259" }, "value": "0x095ea7b3" }, { "argumentTypes": null, "id": 8899, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8885, "src": "471:2:26", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 8900, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8887, "src": "475:5:26", "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": 8896, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "436:3:26", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 8897, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "436:22:26", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 8901, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "436:45:26", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "expression": { "argumentTypes": null, "id": 8894, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8883, "src": "425:5:26", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 8895, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "call", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "425:10:26", "typeDescriptions": { "typeIdentifier": "t_function_barecall_payable$_t_bytes_memory_ptr_$returns$_t_bool_$_t_bytes_memory_ptr_$", "typeString": "function (bytes memory) payable returns (bool,bytes memory)" } }, "id": 8902, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "425:57:26", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$_t_bool_$_t_bytes_memory_ptr_$", "typeString": "tuple(bool,bytes memory)" } }, "nodeType": "VariableDeclarationStatement", "src": "389:93:26" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 8919, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 8905, "name": "success", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8891, "src": "513:7:26", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 8917, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 8909, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 8906, "name": "data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8893, "src": "525:4:26", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 8907, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "525:11:26", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 8908, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "540:1:26", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "525:16:26", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 8912, "name": "data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8893, "src": "556:4:26", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "argumentTypes": null, "components": [ { "argumentTypes": null, "id": 8914, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "563:4:26", "typeDescriptions": { "typeIdentifier": "t_type$_t_bool_$", "typeString": "type(bool)" }, "typeName": { "id": 8913, "name": "bool", "nodeType": "ElementaryTypeName", "src": "563:4:26", "typeDescriptions": { "typeIdentifier": null, "typeString": null } } } ], "id": 8915, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "562:6:26", "typeDescriptions": { "typeIdentifier": "t_type$_t_bool_$", "typeString": "type(bool)" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_type$_t_bool_$", "typeString": "type(bool)" } ], "expression": { "argumentTypes": null, "id": 8910, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "545:3:26", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 8911, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "decode", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "545:10:26", "typeDescriptions": { "typeIdentifier": "t_function_abidecode_pure$__$returns$__$", "typeString": "function () pure" } }, "id": 8916, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "545:24:26", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "525:44:26", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 8918, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "524:46:26", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "513:57:26", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "5472616e7366657248656c7065723a3a73616665417070726f76653a20617070726f7665206661696c6564", "id": 8920, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "584:45:26", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_b4dd1eb4be82119fd3a99acfb5dd4c57591eb0ea309359b1af3d65a4460c7123", "typeString": "literal_string \"TransferHelper::safeApprove: approve failed\"" }, "value": "TransferHelper::safeApprove: approve failed" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_b4dd1eb4be82119fd3a99acfb5dd4c57591eb0ea309359b1af3d65a4460c7123", "typeString": "literal_string \"TransferHelper::safeApprove: approve failed\"" } ], "id": 8904, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "492:7:26", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 8921, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "492:147:26", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 8922, "nodeType": "ExpressionStatement", "src": "492:147:26" } ] }, "documentation": null, "id": 8924, "implemented": true, "kind": "function", "modifiers": [], "name": "safeApprove", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 8888, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8883, "mutability": "mutable", "name": "token", "nodeType": "VariableDeclaration", "overrides": null, "scope": 8924, "src": "242:13:26", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 8882, "name": "address", "nodeType": "ElementaryTypeName", "src": "242:7:26", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 8885, "mutability": "mutable", "name": "to", "nodeType": "VariableDeclaration", "overrides": null, "scope": 8924, "src": "265:10:26", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 8884, "name": "address", "nodeType": "ElementaryTypeName", "src": "265:7:26", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 8887, "mutability": "mutable", "name": "value", "nodeType": "VariableDeclaration", "overrides": null, "scope": 8924, "src": "285:13:26", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 8886, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "285:7:26", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "232:72:26" }, "returnParameters": { "id": 8889, "nodeType": "ParameterList", "parameters": [], "src": "314:0:26" }, "scope": 9039, "src": "212:434:26", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 8966, "nodeType": "Block", "src": "755:335:26", "statements": [ { "assignments": [ 8934, 8936 ], "declarations": [ { "constant": false, "id": 8934, "mutability": "mutable", "name": "success", "nodeType": "VariableDeclaration", "overrides": null, "scope": 8966, "src": "832:12:26", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 8933, "name": "bool", "nodeType": "ElementaryTypeName", "src": "832:4:26", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 8936, "mutability": "mutable", "name": "data", "nodeType": "VariableDeclaration", "overrides": null, "scope": 8966, "src": "846:17:26", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 8935, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "846:5:26", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "id": 8946, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30786139303539636262", "id": 8941, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "901:10:26", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_2835717307_by_1", "typeString": "int_const 2835717307" }, "value": "0xa9059cbb" }, { "argumentTypes": null, "id": 8942, "name": "to", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8928, "src": "913:2:26", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 8943, "name": "value", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8930, "src": "917:5:26", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_2835717307_by_1", "typeString": "int_const 2835717307" }, { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "id": 8939, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "878:3:26", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 8940, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "878:22:26", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 8944, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "878:45:26", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "expression": { "argumentTypes": null, "id": 8937, "name": "token", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8926, "src": "867:5:26", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 8938, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "call", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "867:10:26", "typeDescriptions": { "typeIdentifier": "t_function_barecall_payable$_t_bytes_memory_ptr_$returns$_t_bool_$_t_bytes_memory_ptr_$", "typeString": "function (bytes memory) payable returns (bool,bytes memory)" } }, "id": 8945, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "867:57:26", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$_t_bool_$_t_bytes_memory_ptr_$", "typeString": "tuple(bool,bytes memory)" } }, "nodeType": "VariableDeclarationStatement", "src": "831:93:26" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 8962, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 8948, "name": "success", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8934, "src": "955:7:26", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 8960, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 8952, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 8949, "name": "data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8936, "src": "967:4:26", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 8950, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "967:11:26", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 8951, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "982:1:26", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "967:16:26", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "||", "rightExpression": { "argumentTypes": null, "arguments": [ {