{ "contractName": "GsnUtils", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.8.7+commit.e28d00a7\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"kind\":\"dev\",\"methods\":{},\"title\":\"The GSN Solidity Utils Library\",\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"notice\":\"Some library functions used throughout the GSN Solidity codebase.\",\"version\":1}},\"settings\":{\"compilationTarget\":{\"/Users/alexf/gsn2/packages/contracts/solpp/utils/GsnUtils.sol\":\"GsnUtils\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"/Users/alexf/gsn2/packages/contracts/solpp/forwarder/IForwarder.sol\":{\"keccak256\":\"0xef3d770001c3245db4408cdd0afdfc622695ccfe31f28b74571d05158bbf83f8\",\"license\":\"GPL-3.0-only\",\"urls\":[\"bzz-raw://08949174ed05b596d89c8f1eeedfeb254993b84054bbc1ff6081ad926f5db406\",\"dweb:/ipfs/QmNQtKzHpie4Esocxuc9YrPtGQyA928a1a5TWbVc7cPoqk\"]},\"/Users/alexf/gsn2/packages/contracts/solpp/utils/GsnTypes.sol\":{\"keccak256\":\"0xfc3ed2bbd925e24facf0c3bb96d57dd7fc5bcc4a684b5473f04e8d209b758805\",\"license\":\"GPL-3.0-only\",\"urls\":[\"bzz-raw://cb57b5b38d3e588f119ae45174891f2049d1d0de160a12b81a20335cd8bf731b\",\"dweb:/ipfs/Qmf6xfbdLbTKEpnzxwnSaRy1YZJtLYTZh8URqry86oyoSU\"]},\"/Users/alexf/gsn2/packages/contracts/solpp/utils/GsnUtils.sol\":{\"keccak256\":\"0x8616968305b6127f4cb43209502e074c3964230a66c703e6b8623b03e5ec6442\",\"license\":\"GPL-3.0-only\",\"urls\":[\"bzz-raw://2b1f1163fee75613024b38c25e17649933919f4a47a5ba5e8c3ea046023eb1ad\",\"dweb:/ipfs/QmNWReZE8BQ82eXahdKjnNjQWHuH9L9wcTcnKgyV5ypKCa\"]},\"/Users/alexf/gsn2/packages/contracts/solpp/utils/MinLibBytes.sol\":{\"keccak256\":\"0xa61a3d8fcd89182975d0bd17b86c22b6affd2f7bf26db66b1ddb2ee396f122ab\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://2e0bc21e2c8c2f483aee9d5bc003fa77dc7afddbaa7cc99560581a416cfdef11\",\"dweb:/ipfs/QmbwLE7AJpoH2LVeeHxewq3tf1vXhLNUdYsubWxzDGKfTr\"]},\"@openzeppelin/contracts/interfaces/IERC165.sol\":{\"keccak256\":\"0xd04b0f06e0666f29cf7cccc82894de541e19bb30a765b107b1e40bb7fe5f7d7a\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://7b652499d098e88d8d878374616bb58434301061cae2253298b3f374044e0ddb\",\"dweb:/ipfs/QmbhAzctqo5jrSKU6idHdVyqfmzCcDbNUPvmx4GiXxfA6q\"]},\"@openzeppelin/contracts/utils/introspection/IERC165.sol\":{\"keccak256\":\"0x447a5f3ddc18419d41ff92b3773fb86471b1db25773e07f877f548918a185bf1\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://be161e54f24e5c6fae81a12db1a8ae87bc5ae1b0ddc805d82a1440a68455088f\",\"dweb:/ipfs/QmP7C3CHdY9urF4dEMb9wmsp1wMxHF6nhA2yQE5SKiPAdy\"]}},\"version\":1}", "bytecode": "0x60566037600b82828239805160001a607314602a57634e487b7160e01b600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220d269c8ff5257e23c9871b3dc7869bffc07894161b677a46e2fbc946a8aeadd7664736f6c63430008070033", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220d269c8ff5257e23c9871b3dc7869bffc07894161b677a46e2fbc946a8aeadd7664736f6c63430008070033", "immutableReferences": {}, "sourceMap": "295:1990:40:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;295:1990:40;;;;;;;;;;;;;;;;;", "deployedSourceMap": "295:1990:40:-:0;;;;;;;;", "source": "pragma solidity ^0.8.0;\n\n/* solhint-disable no-inline-assembly */\n// SPDX-License-Identifier: GPL-3.0-only\n\nimport \"../utils/MinLibBytes.sol\";\nimport \"./GsnTypes.sol\";\n\n/**\n * @title The GSN Solidity Utils Library\n * @notice Some library functions used throughout the GSN Solidity codebase.\n */\nlibrary GsnUtils {\n\n bytes32 constant private RELAY_REQUEST_ID_MASK = 0x00000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF;\n\n /**\n * @notice Calculate an identifier for the meta-transaction in a format similar to a transaction hash.\n * Note that uniqueness relies on signature and may not be enforced if meta-transactions are verified\n * with a different algorithm, e.g. when batching.\n * @param relayRequest The `RelayRequest` for which an ID is being calculated.\n * @param signature The signature for the `RelayRequest`. It is not validated here and may even remain empty.\n */\n function getRelayRequestID(GsnTypes.RelayRequest calldata relayRequest, bytes calldata signature)\n internal\n pure\n returns (bytes32) {\n return keccak256(abi.encode(relayRequest.request.from, relayRequest.request.nonce, signature)) & RELAY_REQUEST_ID_MASK;\n }\n\n /**\n * @notice Extract the method identifier signature from the encoded function call.\n */\n function getMethodSig(bytes memory msgData) internal pure returns (bytes4) {\n return MinLibBytes.readBytes4(msgData, 0);\n }\n\n /**\n * @notice Extract a parameter from encoded-function block.\n * see: https://solidity.readthedocs.io/en/develop/abi-spec.html#formal-specification-of-the-encoding\n * The return value should be casted to the right type (`uintXXX`/`bytesXXX`/`address`/`bool`/`enum`).\n * @param msgData Byte array containing a uint256 value.\n * @param index Index in byte array of uint256 value.\n * @return result uint256 value from byte array.\n */\n function getParam(bytes memory msgData, uint256 index) internal pure returns (uint256 result) {\n return MinLibBytes.readUint256(msgData, 4 + index * 32);\n }\n\n /// @notice Re-throw revert with the same revert data.\n function revertWithData(bytes memory data) internal pure {\n assembly {\n revert(add(data,32), mload(data))\n }\n }\n\n}", "sourcePath": "/Users/alexf/gsn2/packages/contracts/solpp/utils/GsnUtils.sol", "ast": { "absolutePath": "/Users/alexf/gsn2/packages/contracts/solpp/utils/GsnUtils.sol", "exportedSymbols": { "GsnTypes": [ 8492 ], "GsnUtils": [ 8572 ], "IERC165": [ 12352 ], "IForwarder": [ 5129 ], "MinLibBytes": [ 8687 ] }, "id": 8573, "license": "GPL-3.0-only", "nodeType": "SourceUnit", "nodes": [ { "id": 8494, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:40" }, { "absolutePath": "/Users/alexf/gsn2/packages/contracts/solpp/utils/MinLibBytes.sol", "file": "../utils/MinLibBytes.sol", "id": 8495, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 8573, "sourceUnit": 8688, "src": "108:34:40", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/alexf/gsn2/packages/contracts/solpp/utils/GsnTypes.sol", "file": "./GsnTypes.sol", "id": 8496, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 8573, "sourceUnit": 8493, "src": "143:24:40", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": { "id": 8497, "nodeType": "StructuredDocumentation", "src": "169:125:40", "text": " @title The GSN Solidity Utils Library\n @notice Some library functions used throughout the GSN Solidity codebase." }, "fullyImplemented": true, "id": 8572, "linearizedBaseContracts": [ 8572 ], "name": "GsnUtils", "nameLocation": "303:8:40", "nodeType": "ContractDefinition", "nodes": [ { "constant": true, "id": 8500, "mutability": "constant", "name": "RELAY_REQUEST_ID_MASK", "nameLocation": "344:21:40", "nodeType": "VariableDeclaration", "scope": 8572, "src": "319:115:40", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 8498, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "319:7:40", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": { "hexValue": "307830303030303030304646464646464646464646464646464646464646464646464646464646464646464646464646464646464646464646464646464646464646", "id": 8499, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "368:66:40", "typeDescriptions": { "typeIdentifier": "t_rational_26959946667150639794667015087019630673637144422540572481103610249215_by_1", "typeString": "int_const 2695...(60 digits omitted)...9215" }, "value": "0x00000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF" }, "visibility": "private" }, { "body": { "id": 8526, "nodeType": "Block", "src": "1064:135:40", "statements": [ { "expression": { "commonType": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "id": 8524, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "arguments": [ { "expression": { "expression": { "id": 8514, "name": "relayRequest", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8504, "src": "1102:12:40", "typeDescriptions": { "typeIdentifier": "t_struct$_RelayRequest_$8491_calldata_ptr", "typeString": "struct GsnTypes.RelayRequest calldata" } }, "id": 8515, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "request", "nodeType": "MemberAccess", "referencedDeclaration": 8487, "src": "1102:20:40", "typeDescriptions": { "typeIdentifier": "t_struct$_ForwardRequest_$5058_calldata_ptr", "typeString": "struct IForwarder.ForwardRequest calldata" } }, "id": 8516, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "from", "nodeType": "MemberAccess", "referencedDeclaration": 5045, "src": "1102:25:40", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "expression": { "expression": { "id": 8517, "name": "relayRequest", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8504, "src": "1129:12:40", "typeDescriptions": { "typeIdentifier": "t_struct$_RelayRequest_$8491_calldata_ptr", "typeString": "struct GsnTypes.RelayRequest calldata" } }, "id": 8518, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "request", "nodeType": "MemberAccess", "referencedDeclaration": 8487, "src": "1129:20:40", "typeDescriptions": { "typeIdentifier": "t_struct$_ForwardRequest_$5058_calldata_ptr", "typeString": "struct IForwarder.ForwardRequest calldata" } }, "id": 8519, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "nonce", "nodeType": "MemberAccess", "referencedDeclaration": 5053, "src": "1129:26:40", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "id": 8520, "name": "signature", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8506, "src": "1157:9:40", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } ], "expression": { "id": 8512, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "1091:3:40", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 8513, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encode", "nodeType": "MemberAccess", "src": "1091:10:40", "typeDescriptions": { "typeIdentifier": "t_function_abiencode_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 8521, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1091:76:40", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 8511, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967288, "src": "1081:9:40", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 8522, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1081:87:40", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "nodeType": "BinaryOperation", "operator": "&", "rightExpression": { "id": 8523, "name": "RELAY_REQUEST_ID_MASK", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8500, "src": "1171:21:40", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "src": "1081:111:40", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "functionReturnParameters": 8510, "id": 8525, "nodeType": "Return", "src": "1074:118:40" } ] }, "documentation": { "id": 8501, "nodeType": "StructuredDocumentation", "src": "441:476:40", "text": " @notice Calculate an identifier for the meta-transaction in a format similar to a transaction hash.\n Note that uniqueness relies on signature and may not be enforced if meta-transactions are verified\n with a different algorithm, e.g. when batching.\n @param relayRequest The `RelayRequest` for which an ID is being calculated.\n @param signature The signature for the `RelayRequest`. It is not validated here and may even remain empty." }, "id": 8527, "implemented": true, "kind": "function", "modifiers": [], "name": "getRelayRequestID", "nameLocation": "931:17:40", "nodeType": "FunctionDefinition", "parameters": { "id": 8507, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8504, "mutability": "mutable", "name": "relayRequest", "nameLocation": "980:12:40", "nodeType": "VariableDeclaration", "scope": 8527, "src": "949:43:40", "stateVariable": false, "storageLocation": "calldata", "typeDescriptions": { "typeIdentifier": "t_struct$_RelayRequest_$8491_calldata_ptr", "typeString": "struct GsnTypes.RelayRequest" }, "typeName": { "id": 8503, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 8502, "name": "GsnTypes.RelayRequest", "nodeType": "IdentifierPath", "referencedDeclaration": 8491, "src": "949:21:40" }, "referencedDeclaration": 8491, "src": "949:21:40", "typeDescriptions": { "typeIdentifier": "t_struct$_RelayRequest_$8491_storage_ptr", "typeString": "struct GsnTypes.RelayRequest" } }, "visibility": "internal" }, { "constant": false, "id": 8506, "mutability": "mutable", "name": "signature", "nameLocation": "1009:9:40", "nodeType": "VariableDeclaration", "scope": 8527, "src": "994:24:40", "stateVariable": false, "storageLocation": "calldata", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes" }, "typeName": { "id": 8505, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "994:5:40", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "948:71:40" }, "returnParameters": { "id": 8510, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8509, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 8527, "src": "1055:7:40", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 8508, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1055:7:40", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "src": "1054:9:40" }, "scope": 8572, "src": "922:277:40", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 8541, "nodeType": "Block", "src": "1383:58:40", "statements": [ { "expression": { "arguments": [ { "id": 8537, "name": "msgData", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8530, "src": "1423:7:40", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "hexValue": "30", "id": 8538, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1432:1:40", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "expression": { "id": 8535, "name": "MinLibBytes", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8687, "src": "1400:11:40", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_MinLibBytes_$8687_$", "typeString": "type(library MinLibBytes)" } }, "id": 8536, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "readBytes4", "nodeType": "MemberAccess", "referencedDeclaration": 8686, "src": "1400:22:40", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes_memory_ptr_$_t_uint256_$returns$_t_bytes4_$", "typeString": "function (bytes memory,uint256) pure returns (bytes4)" } }, "id": 8539, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1400:34:40", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "functionReturnParameters": 8534, "id": 8540, "nodeType": "Return", "src": "1393:41:40" } ] }, "documentation": { "id": 8528, "nodeType": "StructuredDocumentation", "src": "1205:98:40", "text": " @notice Extract the method identifier signature from the encoded function call." }, "id": 8542, "implemented": true, "kind": "function", "modifiers": [], "name": "getMethodSig", "nameLocation": "1317:12:40", "nodeType": "FunctionDefinition", "parameters": { "id": 8531, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8530, "mutability": "mutable", "name": "msgData", "nameLocation": "1343:7:40", "nodeType": "VariableDeclaration", "scope": 8542, "src": "1330:20:40", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 8529, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "1330:5:40", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "1329:22:40" }, "returnParameters": { "id": 8534, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8533, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 8542, "src": "1375:6:40", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 8532, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "1375:6:40", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "visibility": "internal" } ], "src": "1374:8:40" }, "scope": 8572, "src": "1308:133:40", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 8562, "nodeType": "Block", "src": "2006:72:40", "statements": [ { "expression": { "arguments": [ { "id": 8554, "name": "msgData", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8545, "src": "2047:7:40", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 8559, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "hexValue": "34", "id": 8555, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2056:1:40", "typeDescriptions": { "typeIdentifier": "t_rational_4_by_1", "typeString": "int_const 4" }, "value": "4" }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 8558, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 8556, "name": "index", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8547, "src": "2060:5:40", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "*", "rightExpression": { "hexValue": "3332", "id": 8557, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2068:2:40", "typeDescriptions": { "typeIdentifier": "t_rational_32_by_1", "typeString": "int_const 32" }, "value": "32" }, "src": "2060:10:40", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "2056:14:40", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 8552, "name": "MinLibBytes", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8687, "src": "2023:11:40", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_MinLibBytes_$8687_$", "typeString": "type(library MinLibBytes)" } }, "id": 8553, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "readUint256", "nodeType": "MemberAccess", "referencedDeclaration": 8663, "src": "2023:23:40", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes_memory_ptr_$_t_uint256_$returns$_t_uint256_$", "typeString": "function (bytes memory,uint256) pure returns (uint256)" } }, "id": 8560, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2023:48:40", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 8551, "id": 8561, "nodeType": "Return", "src": "2016:55:40" } ] }, "documentation": { "id": 8543, "nodeType": "StructuredDocumentation", "src": "1447:460:40", "text": " @notice Extract a parameter from encoded-function block.\n see: https://solidity.readthedocs.io/en/develop/abi-spec.html#formal-specification-of-the-encoding\n The return value should be casted to the right type (`uintXXX`/`bytesXXX`/`address`/`bool`/`enum`).\n @param msgData Byte array containing a uint256 value.\n @param index Index in byte array of uint256 value.\n @return result uint256 value from byte array." }, "id": 8563, "implemented": true, "kind": "function", "modifiers": [], "name": "getParam", "nameLocation": "1921:8:40", "nodeType": "FunctionDefinition", "parameters": { "id": 8548, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8545, "mutability": "mutable", "name": "msgData", "nameLocation": "1943:7:40", "nodeType": "VariableDeclaration", "scope": 8563, "src": "1930:20:40", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 8544, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "1930:5:40", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" }, { "constant": false, "id": 8547, "mutability": "mutable", "name": "index", "nameLocation": "1960:5:40", "nodeType": "VariableDeclaration", "scope": 8563, "src": "1952:13:40", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 8546, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1952:7:40", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1929:37:40" }, "returnParameters": { "id": 8551, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8550, "mutability": "mutable", "name": "result", "nameLocation": "1998:6:40", "nodeType": "VariableDeclaration", "scope": 8563, "src": "1990:14:40", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 8549, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1990:7:40", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1989:16:40" }, "scope": 8572, "src": "1912:166:40", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 8570, "nodeType": "Block", "src": "2200:82:40", "statements": [ { "AST": { "nodeType": "YulBlock", "src": "2219:57:40", "statements": [ { "expression": { "arguments": [ { "arguments": [ { "name": "data", "nodeType": "YulIdentifier", "src": "2244:4:40" }, { "kind": "number", "nodeType": "YulLiteral", "src": "2249:2:40", "type": "", "value": "32" } ], "functionName": { "name": "add", "nodeType": "YulIdentifier", "src": "2240:3:40" }, "nodeType": "YulFunctionCall", "src": "2240:12:40" }, { "arguments": [ { "name": "data", "nodeType": "YulIdentifier", "src": "2260:4:40" } ], "functionName": { "name": "mload", "nodeType": "YulIdentifier", "src": "2254:5:40" }, "nodeType": "YulFunctionCall", "src": "2254:11:40" } ], "functionName": { "name": "revert", "nodeType": "YulIdentifier", "src": "2233:6:40" }, "nodeType": "YulFunctionCall", "src": "2233:33:40" }, "nodeType": "YulExpressionStatement", "src": "2233:33:40" } ] }, "evmVersion": "london", "externalReferences": [ { "declaration": 8566, "isOffset": false, "isSlot": false, "src": "2244:4:40", "valueSize": 1 }, { "declaration": 8566, "isOffset": false, "isSlot": false, "src": "2260:4:40", "valueSize": 1 } ], "id": 8569, "nodeType": "InlineAssembly", "src": "2210:66:40" } ] }, "documentation": { "id": 8564, "nodeType": "StructuredDocumentation", "src": "2084:54:40", "text": "@notice Re-throw revert with the same revert data." }, "id": 8571, "implemented": true, "kind": "function", "modifiers": [], "name": "revertWithData", "nameLocation": "2152:14:40", "nodeType": "FunctionDefinition", "parameters": { "id": 8567, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8566, "mutability": "mutable", "name": "data", "nameLocation": "2180:4:40", "nodeType": "VariableDeclaration", "scope": 8571, "src": "2167:17:40", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 8565, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "2167:5:40", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "2166:19:40" }, "returnParameters": { "id": 8568, "nodeType": "ParameterList", "parameters": [], "src": "2200:0:40" }, "scope": 8572, "src": "2143:139:40", "stateMutability": "pure", "virtual": false, "visibility": "internal" } ], "scope": 8573, "src": "295:1990:40", "usedErrors": [] } ], "src": "0:2285:40" }, "legacyAST": { "absolutePath": "/Users/alexf/gsn2/packages/contracts/solpp/utils/GsnUtils.sol", "exportedSymbols": { "GsnTypes": [ 8492 ], "GsnUtils": [ 8572 ], "IERC165": [ 12352 ], "IForwarder": [ 5129 ], "MinLibBytes": [ 8687 ] }, "id": 8573, "license": "GPL-3.0-only", "nodeType": "SourceUnit", "nodes": [ { "id": 8494, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:40" }, { "absolutePath": "/Users/alexf/gsn2/packages/contracts/solpp/utils/MinLibBytes.sol", "file": "../utils/MinLibBytes.sol", "id": 8495, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 8573, "sourceUnit": 8688, "src": "108:34:40", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/alexf/gsn2/packages/contracts/solpp/utils/GsnTypes.sol", "file": "./GsnTypes.sol", "id": 8496, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 8573, "sourceUnit": 8493, "src": "143:24:40", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": { "id": 8497, "nodeType": "StructuredDocumentation", "src": "169:125:40", "text": " @title The GSN Solidity Utils Library\n @notice Some library functions used throughout the GSN Solidity codebase." }, "fullyImplemented": true, "id": 8572, "linearizedBaseContracts": [ 8572 ], "name": "GsnUtils", "nameLocation": "303:8:40", "nodeType": "ContractDefinition", "nodes": [ { "constant": true, "id": 8500, "mutability": "constant", "name": "RELAY_REQUEST_ID_MASK", "nameLocation": "344:21:40", "nodeType": "VariableDeclaration", "scope": 8572, "src": "319:115:40", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 8498, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "319:7:40", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": { "hexValue": "307830303030303030304646464646464646464646464646464646464646464646464646464646464646464646464646464646464646464646464646464646464646", "id": 8499, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "368:66:40", "typeDescriptions": { "typeIdentifier": "t_rational_26959946667150639794667015087019630673637144422540572481103610249215_by_1", "typeString": "int_const 2695...(60 digits omitted)...9215" }, "value": "0x00000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF" }, "visibility": "private" }, { "body": { "id": 8526, "nodeType": "Block", "src": "1064:135:40", "statements": [ { "expression": { "commonType": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "id": 8524, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "arguments": [ { "expression": { "expression": { "id": 8514, "name": "relayRequest", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8504, "src": "1102:12:40", "typeDescriptions": { "typeIdentifier": "t_struct$_RelayRequest_$8491_calldata_ptr", "typeString": "struct GsnTypes.RelayRequest calldata" } }, "id": 8515, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "request", "nodeType": "MemberAccess", "referencedDeclaration": 8487, "src": "1102:20:40", "typeDescriptions": { "typeIdentifier": "t_struct$_ForwardRequest_$5058_calldata_ptr", "typeString": "struct IForwarder.ForwardRequest calldata" } }, "id": 8516, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "from", "nodeType": "MemberAccess", "referencedDeclaration": 5045, "src": "1102:25:40", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "expression": { "expression": { "id": 8517, "name": "relayRequest", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8504, "src": "1129:12:40", "typeDescriptions": { "typeIdentifier": "t_struct$_RelayRequest_$8491_calldata_ptr", "typeString": "struct GsnTypes.RelayRequest calldata" } }, "id": 8518, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "request", "nodeType": "MemberAccess", "referencedDeclaration": 8487, "src": "1129:20:40", "typeDescriptions": { "typeIdentifier": "t_struct$_ForwardRequest_$5058_calldata_ptr", "typeString": "struct IForwarder.ForwardRequest calldata" } }, "id": 8519, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "nonce", "nodeType": "MemberAccess", "referencedDeclaration": 5053, "src": "1129:26:40", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "id": 8520, "name": "signature", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8506, "src": "1157:9:40", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } ], "expression": { "id": 8512, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "1091:3:40", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 8513, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encode", "nodeType": "MemberAccess", "src": "1091:10:40", "typeDescriptions": { "typeIdentifier": "t_function_abiencode_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 8521, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1091:76:40", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 8511, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967288, "src": "1081:9:40", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 8522, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1081:87:40", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "nodeType": "BinaryOperation", "operator": "&", "rightExpression": { "id": 8523, "name": "RELAY_REQUEST_ID_MASK", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8500, "src": "1171:21:40", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "src": "1081:111:40", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "functionReturnParameters": 8510, "id": 8525, "nodeType": "Return", "src": "1074:118:40" } ] }, "documentation": { "id": 8501, "nodeType": "StructuredDocumentation", "src": "441:476:40", "text": " @notice Calculate an identifier for the meta-transaction in a format similar to a transaction hash.\n Note that uniqueness relies on signature and may not be enforced if meta-transactions are verified\n with a different algorithm, e.g. when batching.\n @param relayRequest The `RelayRequest` for which an ID is being calculated.\n @param signature The signature for the `RelayRequest`. It is not validated here and may even remain empty." }, "id": 8527, "implemented": true, "kind": "function", "modifiers": [], "name": "getRelayRequestID", "nameLocation": "931:17:40", "nodeType": "FunctionDefinition", "parameters": { "id": 8507, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8504, "mutability": "mutable", "name": "relayRequest", "nameLocation": "980:12:40", "nodeType": "VariableDeclaration", "scope": 8527, "src": "949:43:40", "stateVariable": false, "storageLocation": "calldata", "typeDescriptions": { "typeIdentifier": "t_struct$_RelayRequest_$8491_calldata_ptr", "typeString": "struct GsnTypes.RelayRequest" }, "typeName": { "id": 8503, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 8502, "name": "GsnTypes.RelayRequest", "nodeType": "IdentifierPath", "referencedDeclaration": 8491, "src": "949:21:40" }, "referencedDeclaration": 8491, "src": "949:21:40", "typeDescriptions": { "typeIdentifier": "t_struct$_RelayRequest_$8491_storage_ptr", "typeString": "struct GsnTypes.RelayRequest" } }, "visibility": "internal" }, { "constant": false, "id": 8506, "mutability": "mutable", "name": "signature", "nameLocation": "1009:9:40", "nodeType": "VariableDeclaration", "scope": 8527, "src": "994:24:40", "stateVariable": false, "storageLocation": "calldata", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes" }, "typeName": { "id": 8505, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "994:5:40", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "948:71:40" }, "returnParameters": { "id": 8510, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8509, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 8527, "src": "1055:7:40", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 8508, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1055:7:40", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "src": "1054:9:40" }, "scope": 8572, "src": "922:277:40", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 8541, "nodeType": "Block", "src": "1383:58:40", "statements": [ { "expression": { "arguments": [ { "id": 8537, "name": "msgData", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8530, "src": "1423:7:40", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "hexValue": "30", "id": 8538, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1432:1:40", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "expression": { "id": 8535, "name": "MinLibBytes", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8687, "src": "1400:11:40", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_MinLibBytes_$8687_$", "typeString": "type(library MinLibBytes)" } }, "id": 8536, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "readBytes4", "nodeType": "MemberAccess", "referencedDeclaration": 8686, "src": "1400:22:40", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes_memory_ptr_$_t_uint256_$returns$_t_bytes4_$", "typeString": "function (bytes memory,uint256) pure returns (bytes4)" } }, "id": 8539, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1400:34:40", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "functionReturnParameters": 8534, "id": 8540, "nodeType": "Return", "src": "1393:41:40" } ] }, "documentation": { "id": 8528, "nodeType": "StructuredDocumentation", "src": "1205:98:40", "text": " @notice Extract the method identifier signature from the encoded function call." }, "id": 8542, "implemented": true, "kind": "function", "modifiers": [], "name": "getMethodSig", "nameLocation": "1317:12:40", "nodeType": "FunctionDefinition", "parameters": { "id": 8531, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8530, "mutability": "mutable", "name": "msgData", "nameLocation": "1343:7:40", "nodeType": "VariableDeclaration", "scope": 8542, "src": "1330:20:40", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 8529, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "1330:5:40", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "1329:22:40" }, "returnParameters": { "id": 8534, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8533, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 8542, "src": "1375:6:40", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 8532, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "1375:6:40", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "visibility": "internal" } ], "src": "1374:8:40" }, "scope": 8572, "src": "1308:133:40", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 8562, "nodeType": "Block", "src": "2006:72:40", "statements": [ { "expression": { "arguments": [ { "id": 8554, "name": "msgData", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8545, "src": "2047:7:40", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 8559, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "hexValue": "34", "id": 8555, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2056:1:40", "typeDescriptions": { "typeIdentifier": "t_rational_4_by_1", "typeString": "int_const 4" }, "value": "4" }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 8558, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 8556, "name": "index", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8547, "src": "2060:5:40", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "*", "rightExpression": { "hexValue": "3332", "id": 8557, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2068:2:40", "typeDescriptions": { "typeIdentifier": "t_rational_32_by_1", "typeString": "int_const 32" }, "value": "32" }, "src": "2060:10:40", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "2056:14:40", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 8552, "name": "MinLibBytes", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 8687, "src": "2023:11:40", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_MinLibBytes_$8687_$", "typeString": "type(library MinLibBytes)" } }, "id": 8553, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "readUint256", "nodeType": "MemberAccess", "referencedDeclaration": 8663, "src": "2023:23:40", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes_memory_ptr_$_t_uint256_$returns$_t_uint256_$", "typeString": "function (bytes memory,uint256) pure returns (uint256)" } }, "id": 8560, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2023:48:40", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 8551, "id": 8561, "nodeType": "Return", "src": "2016:55:40" } ] }, "documentation": { "id": 8543, "nodeType": "StructuredDocumentation", "src": "1447:460:40", "text": " @notice Extract a parameter from encoded-function block.\n see: https://solidity.readthedocs.io/en/develop/abi-spec.html#formal-specification-of-the-encoding\n The return value should be casted to the right type (`uintXXX`/`bytesXXX`/`address`/`bool`/`enum`).\n @param msgData Byte array containing a uint256 value.\n @param index Index in byte array of uint256 value.\n @return result uint256 value from byte array." }, "id": 8563, "implemented": true, "kind": "function", "modifiers": [], "name": "getParam", "nameLocation": "1921:8:40", "nodeType": "FunctionDefinition", "parameters": { "id": 8548, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8545, "mutability": "mutable", "name": "msgData", "nameLocation": "1943:7:40", "nodeType": "VariableDeclaration", "scope": 8563, "src": "1930:20:40", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 8544, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "1930:5:40", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" }, { "constant": false, "id": 8547, "mutability": "mutable", "name": "index", "nameLocation": "1960:5:40", "nodeType": "VariableDeclaration", "scope": 8563, "src": "1952:13:40", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 8546, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1952:7:40", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1929:37:40" }, "returnParameters": { "id": 8551, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8550, "mutability": "mutable", "name": "result", "nameLocation": "1998:6:40", "nodeType": "VariableDeclaration", "scope": 8563, "src": "1990:14:40", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 8549, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1990:7:40", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "visibility": "internal" } ], "src": "1989:16:40" }, "scope": 8572, "src": "1912:166:40", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 8570, "nodeType": "Block", "src": "2200:82:40", "statements": [ { "AST": { "nodeType": "YulBlock", "src": "2219:57:40", "statements": [ { "expression": { "arguments": [ { "arguments": [ { "name": "data", "nodeType": "YulIdentifier", "src": "2244:4:40" }, { "kind": "number", "nodeType": "YulLiteral", "src": "2249:2:40", "type": "", "value": "32" } ], "functionName": { "name": "add", "nodeType": "YulIdentifier", "src": "2240:3:40" }, "nodeType": "YulFunctionCall", "src": "2240:12:40" }, { "arguments": [ { "name": "data", "nodeType": "YulIdentifier", "src": "2260:4:40" } ], "functionName": { "name": "mload", "nodeType": "YulIdentifier", "src": "2254:5:40" }, "nodeType": "YulFunctionCall", "src": "2254:11:40" } ], "functionName": { "name": "revert", "nodeType": "YulIdentifier", "src": "2233:6:40" }, "nodeType": "YulFunctionCall", "src": "2233:33:40" }, "nodeType": "YulExpressionStatement", "src": "2233:33:40" } ] }, "evmVersion": "london", "externalReferences": [ { "declaration": 8566, "isOffset": false, "isSlot": false, "src": "2244:4:40", "valueSize": 1 }, { "declaration": 8566, "isOffset": false, "isSlot": false, "src": "2260:4:40", "valueSize": 1 } ], "id": 8569, "nodeType": "InlineAssembly", "src": "2210:66:40" } ] }, "documentation": { "id": 8564, "nodeType": "StructuredDocumentation", "src": "2084:54:40", "text": "@notice Re-throw revert with the same revert data." }, "id": 8571, "implemented": true, "kind": "function", "modifiers": [], "name": "revertWithData", "nameLocation": "2152:14:40", "nodeType": "FunctionDefinition", "parameters": { "id": 8567, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 8566, "mutability": "mutable", "name": "data", "nameLocation": "2180:4:40", "nodeType": "VariableDeclaration", "scope": 8571, "src": "2167:17:40", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 8565, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "2167:5:40", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "2166:19:40" }, "returnParameters": { "id": 8568, "nodeType": "ParameterList", "parameters": [], "src": "2200:0:40" }, "scope": 8572, "src": "2143:139:40", "stateMutability": "pure", "virtual": false, "visibility": "internal" } ], "scope": 8573, "src": "295:1990:40", "usedErrors": [] } ], "src": "0:2285:40" }, "compiler": { "name": "solc", "version": "0.8.7+commit.e28d00a7.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.1.0", "updatedAt": "2023-03-16T16:54:15.248Z", "devdoc": { "kind": "dev", "methods": {}, "title": "The GSN Solidity Utils Library", "version": 1 }, "userdoc": { "kind": "user", "methods": {}, "notice": "Some library functions used throughout the GSN Solidity codebase.", "version": 1 } }