{ "contractName": "Forwarder", "abi": [ { "inputs": [], "stateMutability": "nonpayable", "type": "constructor" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "bytes32", "name": "domainSeparator", "type": "bytes32" }, { "indexed": false, "internalType": "bytes", "name": "domainValue", "type": "bytes" } ], "name": "DomainRegistered", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "bytes32", "name": "typeHash", "type": "bytes32" }, { "indexed": false, "internalType": "string", "name": "typeStr", "type": "string" } ], "name": "RequestTypeRegistered", "type": "event" }, { "inputs": [], "name": "EIP712_DOMAIN_TYPE", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "GENERIC_PARAMS", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "bytes32", "name": "", "type": "bytes32" } ], "name": "domains", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "bytes32", "name": "", "type": "bytes32" } ], "name": "typeHashes", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "view", "type": "function" }, { "stateMutability": "payable", "type": "receive" }, { "inputs": [ { "internalType": "address", "name": "from", "type": "address" } ], "name": "getNonce", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "components": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "value", "type": "uint256" }, { "internalType": "uint256", "name": "gas", "type": "uint256" }, { "internalType": "uint256", "name": "nonce", "type": "uint256" }, { "internalType": "bytes", "name": "data", "type": "bytes" } ], "internalType": "struct IForwarder.ForwardRequest", "name": "req", "type": "tuple" }, { "internalType": "bytes32", "name": "domainSeparator", "type": "bytes32" }, { "internalType": "bytes32", "name": "requestTypeHash", "type": "bytes32" }, { "internalType": "bytes", "name": "suffixData", "type": "bytes" }, { "internalType": "bytes", "name": "sig", "type": "bytes" } ], "name": "verify", "outputs": [], "stateMutability": "view", "type": "function" }, { "inputs": [ { "components": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "value", "type": "uint256" }, { "internalType": "uint256", "name": "gas", "type": "uint256" }, { "internalType": "uint256", "name": "nonce", "type": "uint256" }, { "internalType": "bytes", "name": "data", "type": "bytes" } ], "internalType": "struct IForwarder.ForwardRequest", "name": "req", "type": "tuple" }, { "internalType": "bytes32", "name": "domainSeparator", "type": "bytes32" }, { "internalType": "bytes32", "name": "requestTypeHash", "type": "bytes32" }, { "internalType": "bytes", "name": "suffixData", "type": "bytes" }, { "internalType": "bytes", "name": "sig", "type": "bytes" } ], "name": "execute", "outputs": [ { "internalType": "bool", "name": "success", "type": "bool" }, { "internalType": "bytes", "name": "ret", "type": "bytes" } ], "stateMutability": "payable", "type": "function" }, { "inputs": [ { "internalType": "string", "name": "typeName", "type": "string" }, { "internalType": "string", "name": "typeSuffix", "type": "string" } ], "name": "registerRequestType", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "string", "name": "name", "type": "string" }, { "internalType": "string", "name": "version", "type": "string" } ], "name": "registerDomainSeparator", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "components": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "value", "type": "uint256" }, { "internalType": "uint256", "name": "gas", "type": "uint256" }, { "internalType": "uint256", "name": "nonce", "type": "uint256" }, { "internalType": "bytes", "name": "data", "type": "bytes" } ], "internalType": "struct IForwarder.ForwardRequest", "name": "req", "type": "tuple" }, { "internalType": "bytes32", "name": "requestTypeHash", "type": "bytes32" }, { "internalType": "bytes", "name": "suffixData", "type": "bytes" } ], "name": "_getEncoded", "outputs": [ { "internalType": "bytes", "name": "", "type": "bytes" } ], "stateMutability": "pure", "type": "function" } ], "metadata": "{\"compiler\":{\"version\":\"0.6.10+commit.00c0fcaf\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"bytes32\",\"name\":\"domainSeparator\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"bytes\",\"name\":\"domainValue\",\"type\":\"bytes\"}],\"name\":\"DomainRegistered\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"bytes32\",\"name\":\"typeHash\",\"type\":\"bytes32\"},{\"indexed\":false,\"internalType\":\"string\",\"name\":\"typeStr\",\"type\":\"string\"}],\"name\":\"RequestTypeRegistered\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"EIP712_DOMAIN_TYPE\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"GENERIC_PARAMS\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"components\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"gas\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"nonce\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"data\",\"type\":\"bytes\"}],\"internalType\":\"struct IForwarder.ForwardRequest\",\"name\":\"req\",\"type\":\"tuple\"},{\"internalType\":\"bytes32\",\"name\":\"requestTypeHash\",\"type\":\"bytes32\"},{\"internalType\":\"bytes\",\"name\":\"suffixData\",\"type\":\"bytes\"}],\"name\":\"_getEncoded\",\"outputs\":[{\"internalType\":\"bytes\",\"name\":\"\",\"type\":\"bytes\"}],\"stateMutability\":\"pure\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"}],\"name\":\"domains\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"components\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"gas\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"nonce\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"data\",\"type\":\"bytes\"}],\"internalType\":\"struct IForwarder.ForwardRequest\",\"name\":\"req\",\"type\":\"tuple\"},{\"internalType\":\"bytes32\",\"name\":\"domainSeparator\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"requestTypeHash\",\"type\":\"bytes32\"},{\"internalType\":\"bytes\",\"name\":\"suffixData\",\"type\":\"bytes\"},{\"internalType\":\"bytes\",\"name\":\"sig\",\"type\":\"bytes\"}],\"name\":\"execute\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"success\",\"type\":\"bool\"},{\"internalType\":\"bytes\",\"name\":\"ret\",\"type\":\"bytes\"}],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"}],\"name\":\"getNonce\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"string\",\"name\":\"name\",\"type\":\"string\"},{\"internalType\":\"string\",\"name\":\"version\",\"type\":\"string\"}],\"name\":\"registerDomainSeparator\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"string\",\"name\":\"typeName\",\"type\":\"string\"},{\"internalType\":\"string\",\"name\":\"typeSuffix\",\"type\":\"string\"}],\"name\":\"registerRequestType\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"}],\"name\":\"typeHashes\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"components\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"gas\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"nonce\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"data\",\"type\":\"bytes\"}],\"internalType\":\"struct IForwarder.ForwardRequest\",\"name\":\"req\",\"type\":\"tuple\"},{\"internalType\":\"bytes32\",\"name\":\"domainSeparator\",\"type\":\"bytes32\"},{\"internalType\":\"bytes32\",\"name\":\"requestTypeHash\",\"type\":\"bytes32\"},{\"internalType\":\"bytes\",\"name\":\"suffixData\",\"type\":\"bytes\"},{\"internalType\":\"bytes\",\"name\":\"sig\",\"type\":\"bytes\"}],\"name\":\"verify\",\"outputs\":[],\"stateMutability\":\"view\",\"type\":\"function\"},{\"stateMutability\":\"payable\",\"type\":\"receive\"}],\"devdoc\":{\"methods\":{}},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"/Users/dror/IdeaProjects/gsn/contracts/forwarder/Forwarder.sol\":\"Forwarder\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"/Users/dror/IdeaProjects/gsn/contracts/forwarder/Forwarder.sol\":{\"keccak256\":\"0x10b4cbeebab696613fa4123c50db43e8ccc2da031a88638e194777cda792a3cb\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://3872a73495ef634e8cedce8718da5e4b8b2faac9b6633cfefdc30c0f90069abc\",\"dweb:/ipfs/QmSmrciT8wkMXNeDh3dWHRe9JFULeEHNQ652WDPAZkwAVu\"]},\"/Users/dror/IdeaProjects/gsn/contracts/forwarder/IForwarder.sol\":{\"keccak256\":\"0x253fd0f17ff0a73a96d83570b9d6bdc027b64e3ff0aca19d6c0b621bd5156aee\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://fd3169e07849f996eb281bf4700cea430e45eda54a80169f0a360362cc2a8e84\",\"dweb:/ipfs/QmXa1x3UpA9tAa26Fwf4b4MkVqeEfEFgDPhNfRMtwJuoms\"]},\"@openzeppelin/contracts/cryptography/ECDSA.sol\":{\"keccak256\":\"0x1efcb1ccef6b3bce65467c4b704cec8d0582e35ff48352269ba8cda4b54ae3da\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://f40d4c72c7f8dfdfb9fd048de5d3ece0020dfcd057b29f0630fd703e7fbe7301\",\"dweb:/ipfs/QmSw7Q9JVVbVDWwVbaJjHhkPmTm8GF3nwVTZUfnmPqTdNm\"]}},\"version\":1}", 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"source": "// SPDX-License-Identifier:MIT\npragma solidity ^0.6.2;\npragma experimental ABIEncoderV2;\n\nimport \"@openzeppelin/contracts/cryptography/ECDSA.sol\";\nimport \"./IForwarder.sol\";\n\ncontract Forwarder is IForwarder {\n using ECDSA for bytes32;\n\n string public constant GENERIC_PARAMS = \"address from,address to,uint256 value,uint256 gas,uint256 nonce,bytes data\";\n\n string public constant EIP712_DOMAIN_TYPE = \"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)\";\n\n mapping(bytes32 => bool) public typeHashes;\n mapping(bytes32 => bool) public domains;\n\n // Nonces of senders, used to prevent replay attacks\n mapping(address => uint256) private nonces;\n\n // solhint-disable-next-line no-empty-blocks\n receive() external payable {}\n\n function getNonce(address from)\n public view override\n returns (uint256) {\n return nonces[from];\n }\n\n constructor() public {\n\n string memory requestType = string(abi.encodePacked(\"ForwardRequest(\", GENERIC_PARAMS, \")\"));\n registerRequestTypeInternal(requestType);\n }\n\n function verify(\n ForwardRequest memory req,\n bytes32 domainSeparator,\n bytes32 requestTypeHash,\n bytes calldata suffixData,\n bytes calldata sig)\n external override view {\n\n _verifyNonce(req);\n _verifySig(req, domainSeparator, requestTypeHash, suffixData, sig);\n }\n\n function execute(\n ForwardRequest memory req,\n bytes32 domainSeparator,\n bytes32 requestTypeHash,\n bytes calldata suffixData,\n bytes calldata sig\n )\n external payable\n override\n returns (bool success, bytes memory ret) {\n _verifyNonce(req);\n _verifySig(req, domainSeparator, requestTypeHash, suffixData, sig);\n _updateNonce(req);\n\n // solhint-disable-next-line avoid-low-level-calls\n (success,ret) = req.to.call{gas : req.gas, value : req.value}(abi.encodePacked(req.data, req.from));\n if ( address(this).balance>0 ) {\n //can't fail: req.from signed (off-chain) the request, so it must be an EOA...\n payable(req.from).transfer(address(this).balance);\n }\n return (success,ret);\n }\n\n\n function _verifyNonce(ForwardRequest memory req) internal view {\n require(nonces[req.from] == req.nonce, \"nonce mismatch\");\n }\n\n function _updateNonce(ForwardRequest memory req) internal {\n nonces[req.from]++;\n }\n\n function registerRequestType(string calldata typeName, string calldata typeSuffix) external override {\n\n for (uint i = 0; i < bytes(typeName).length; i++) {\n bytes1 c = bytes(typeName)[i];\n require(c != \"(\" && c != \")\", \"invalid typename\");\n }\n\n string memory requestType = string(abi.encodePacked(typeName, \"(\", GENERIC_PARAMS, \",\", typeSuffix));\n registerRequestTypeInternal(requestType);\n }\n\n function registerDomainSeparator(string calldata name, string calldata version) external override {\n uint256 chainId;\n /* solhint-disable-next-line no-inline-assembly */\n assembly { chainId := chainid() }\n\n bytes memory domainValue = abi.encode(\n keccak256(bytes(EIP712_DOMAIN_TYPE)),\n keccak256(bytes(name)),\n keccak256(bytes(version)),\n chainId,\n address(this));\n\n bytes32 domainHash = keccak256(domainValue);\n\n domains[domainHash] = true;\n emit DomainRegistered(domainHash, domainValue);\n }\n\n function registerRequestTypeInternal(string memory requestType) internal {\n\n bytes32 requestTypehash = keccak256(bytes(requestType));\n typeHashes[requestTypehash] = true;\n emit RequestTypeRegistered(requestTypehash, requestType);\n }\n\n event DomainRegistered(bytes32 indexed domainSeparator, bytes domainValue);\n\n event RequestTypeRegistered(bytes32 indexed typeHash, string typeStr);\n\n\n function _verifySig(\n ForwardRequest memory req,\n bytes32 domainSeparator,\n bytes32 requestTypeHash,\n bytes memory suffixData,\n bytes memory sig)\n internal\n view\n {\n require(domains[domainSeparator], \"unregistered domain separator\");\n require(typeHashes[requestTypeHash], \"unregistered request typehash\");\n bytes32 digest = keccak256(abi.encodePacked(\n \"\\x19\\x01\", domainSeparator,\n keccak256(_getEncoded(req, requestTypeHash, suffixData))\n ));\n require(digest.recover(sig) == req.from, \"signature mismatch\");\n }\n\n function _getEncoded(\n ForwardRequest memory req,\n bytes32 requestTypeHash,\n bytes memory suffixData\n )\n public\n pure\n returns (\n bytes memory\n ) {\n return abi.encodePacked(\n requestTypeHash,\n abi.encode(\n req.from,\n req.to,\n req.value,\n req.gas,\n req.nonce,\n keccak256(req.data)\n ),\n suffixData\n );\n }\n}\n", "sourcePath": "/Users/dror/IdeaProjects/gsn/contracts/forwarder/Forwarder.sol", "ast": { "absolutePath": "/Users/dror/IdeaProjects/gsn/contracts/forwarder/Forwarder.sol", "exportedSymbols": { "Forwarder": [ 2934 ] }, "id": 2935, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 2481, "literals": [ "solidity", "^", "0.6", ".2" ], "nodeType": "PragmaDirective", "src": "31:23:7" }, { "id": 2482, "literals": [ "experimental", "ABIEncoderV2" ], "nodeType": "PragmaDirective", "src": "55:33:7" }, { "absolutePath": "@openzeppelin/contracts/cryptography/ECDSA.sol", "file": "@openzeppelin/contracts/cryptography/ECDSA.sol", "id": 2483, "nodeType": "ImportDirective", "scope": 2935, "sourceUnit": 6566, "src": "90:56:7", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/dror/IdeaProjects/gsn/contracts/forwarder/IForwarder.sol", "file": "./IForwarder.sol", "id": 2484, "nodeType": "ImportDirective", "scope": 2935, "sourceUnit": 3007, "src": "147:26:7", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 2485, "name": "IForwarder", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 3006, "src": "197:10:7", "typeDescriptions": { "typeIdentifier": "t_contract$_IForwarder_$3006", "typeString": "contract IForwarder" } }, "id": 2486, "nodeType": "InheritanceSpecifier", "src": "197:10:7" } ], 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"bytes32" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" }, { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } ], "id": 2593, "name": "_verifySig", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2898, "src": "1722:10:7", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_struct$_ForwardRequest_$2950_memory_ptr_$_t_bytes32_$_t_bytes32_$_t_bytes_memory_ptr_$_t_bytes_memory_ptr_$returns$__$", "typeString": "function (struct IForwarder.ForwardRequest memory,bytes32,bytes32,bytes memory,bytes memory) view" } }, "id": 2599, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1722:66:7", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2600, "nodeType": "ExpressionStatement", "src": "1722:66:7" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2602, "name": "req", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2573, "src": "1811:3:7", "typeDescriptions": { "typeIdentifier": "t_struct$_ForwardRequest_$2950_memory_ptr", "typeString": "struct IForwarder.ForwardRequest memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_struct$_ForwardRequest_$2950_memory_ptr", "typeString": "struct IForwarder.ForwardRequest memory" } ], "id": 2601, "name": "_updateNonce", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2682, "src": "1798:12:7", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_struct$_ForwardRequest_$2950_memory_ptr_$returns$__$", "typeString": "function (struct IForwarder.ForwardRequest memory)" } }, "id": 2603, "isConstant": false, "isLValue": false, "isPure": false, "kind": 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"isInlineArray": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "TupleExpression", "src": "1885:13:7", "typeDescriptions": { "typeIdentifier": "t_tuple$_t_bool_$_t_bytes_memory_ptr_$", "typeString": "tuple(bool,bytes memory)" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 2618, "name": "req", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2573, "src": "1964:3:7", "typeDescriptions": { "typeIdentifier": "t_struct$_ForwardRequest_$2950_memory_ptr", "typeString": "struct IForwarder.ForwardRequest memory" } }, "id": 2619, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "memberName": "data", "nodeType": "MemberAccess", "referencedDeclaration": 2949, "src": "1964:8:7", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 2620, "name": "req", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2573, "src": "1974:3:7", "typeDescriptions": { "typeIdentifier": "t_struct$_ForwardRequest_$2950_memory_ptr", "typeString": "struct IForwarder.ForwardRequest memory" } }, "id": 2621, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "memberName": "from", "nodeType": "MemberAccess", "referencedDeclaration": 2939, "src": "1974:8:7", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "argumentTypes": null, "id": 2616, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "1947:3:7", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 2617, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodePacked", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "1947:16:7", "typeDescriptions": { "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 2622, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1947:36:7", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "expression": { "argumentTypes": null, "expression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 2608, "name": "req", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2573, "src": "1901:3:7", "typeDescriptions": { "typeIdentifier": "t_struct$_ForwardRequest_$2950_memory_ptr", "typeString": "struct IForwarder.ForwardRequest memory" } }, "id": 2609, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "memberName": "to", "nodeType": "MemberAccess", "referencedDeclaration": 2941, "src": "1901:6:7", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 2610, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "call", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "1901:11:7", "typeDescriptions": { "typeIdentifier": "t_function_barecall_payable$_t_bytes_memory_ptr_$returns$_t_bool_$_t_bytes_memory_ptr_$", "typeString": "function (bytes memory) payable returns (bool,bytes memory)" } }, "id": 2615, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "names": [ "gas", "value" ], "nodeType": "FunctionCallOptions", "options": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 2611, "name": "req", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2573, "src": "1919:3:7", "typeDescriptions": { "typeIdentifier": "t_struct$_ForwardRequest_$2950_memory_ptr", "typeString": "struct IForwarder.ForwardRequest memory" } }, "id": 2612, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "memberName": "gas", "nodeType": "MemberAccess", "referencedDeclaration": 2945, "src": "1919:7:7", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 2613, "name": "req", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2573, "src": "1936:3:7", "typeDescriptions": { "typeIdentifier": "t_struct$_ForwardRequest_$2950_memory_ptr", "typeString": "struct IForwarder.ForwardRequest memory" } }, "id": 2614, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "memberName": "value", "nodeType": "MemberAccess", "referencedDeclaration": 2943, "src": "1936:9:7", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "src": "1901:45:7", "typeDescriptions": { "typeIdentifier": "t_function_barecall_payable$_t_bytes_memory_ptr_$returns$_t_bool_$_t_bytes_memory_ptr_$gasvalue", "typeString": "function (bytes memory) payable returns (bool,bytes memory)" } }, "id": 2623, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1901:83:7", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$_t_bool_$_t_bytes_memory_ptr_$", "typeString": "tuple(bool,bytes memory)" } }, "src": "1885:99:7", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2625, "nodeType": "ExpressionStatement", "src": "1885:99:7" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2632, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2628, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -28, "src": "2007:4:7", "typeDescriptions": { "typeIdentifier": "t_contract$_Forwarder_$2934", "typeString": "contract Forwarder" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_Forwarder_$2934", "typeString": "contract Forwarder" } ], "id": 2627, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "1999:7:7", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2626, "name": "address", "nodeType": "ElementaryTypeName", "src": "1999:7:7", "typeDescriptions": { "typeIdentifier": null, "typeString": null } } }, "id": 2629, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1999:13:7", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "id": 2630, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "balance", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "1999:21:7", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">", "rightExpression": { "argumentTypes": null, "hexValue": "30", "id": 2631, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2021:1:7", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "src": "1999:23:7", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 2647, "nodeType": "IfStatement", "src": "1994:196:7", "trueBody": { "id": 2646, "nodeType": "Block", "src": "2025:165:7", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2641, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -28, "src": "2165:4:7", "typeDescriptions": { "typeIdentifier": "t_contract$_Forwarder_$2934", "typeString": "contract Forwarder" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_Forwarder_$2934", "typeString": "contract Forwarder" } ], "id": 2640, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2157:7:7", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 2639, "name": "address", "nodeType": "ElementaryTypeName", "src": "2157:7:7", "typeDescriptions": { "typeIdentifier": null, "typeString": null } } }, "id": 2642, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2157:13:7", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "id": 2643, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "balance", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "2157:21:7", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 2635, "name": "req", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2573, "src": "2138:3:7", "typeDescriptions": { "typeIdentifier": "t_struct$_ForwardRequest_$2950_memory_ptr", "typeString": "struct IForwarder.ForwardRequest memory" } }, "id": 2636, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "memberName": "from", "nodeType": "MemberAccess", "referencedDeclaration": 2939, "src": "2138:8:7", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 2634, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2130:8:7", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_payable_$", "typeString": "type(address payable)" }, "typeName": { "id": 2633, "name": "address", "nodeType": "ElementaryTypeName", "src": "2130:8:7", "stateMutability": "payable", "typeDescriptions": { "typeIdentifier": null, "typeString": null } } }, "id": 2637, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2130:17:7", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "id": 2638, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "transfer", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "2130:26:7", "typeDescriptions": { "typeIdentifier": "t_function_transfer_nonpayable$_t_uint256_$returns$__$", "typeString": "function (uint256)" } }, "id": 2644, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2130:49:7", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2645, "nodeType": "ExpressionStatement", "src": "2130:49:7" } ] } }, { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "id": 2648, "name": "success", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2585, "src": "2207:7:7", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "id": 2649, "name": "ret", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2587, "src": "2215:3:7", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "id": 2650, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "2206:13:7", "typeDescriptions": { "typeIdentifier": "t_tuple$_t_bool_$_t_bytes_memory_ptr_$", "typeString": "tuple(bool,bytes memory)" } }, "functionReturnParameters": 2588, "id": 2651, "nodeType": "Return", "src": "2199:20:7" } ] }, "documentation": null, "functionSelector": "cdf5735a", "id": 2653, "implemented": true, "kind": "function", "modifiers": [], "name": "execute", "nodeType": "FunctionDefinition", "overrides": { "id": 2583, "nodeType": "OverrideSpecifier", "overrides": [], "src": "1631:8:7" }, "parameters": { "id": 2582, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2573, "mutability": "mutable", "name": "req", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2653, "src": "1445:25:7", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_struct$_ForwardRequest_$2950_memory_ptr", "typeString": "struct IForwarder.ForwardRequest" }, "typeName": { "contractScope": null, "id": 2572, "name": "ForwardRequest", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 2950, "src": "1445:14:7", "typeDescriptions": { "typeIdentifier": "t_struct$_ForwardRequest_$2950_storage_ptr", "typeString": "struct IForwarder.ForwardRequest" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2575, "mutability": "mutable", "name": "domainSeparator", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2653, "src": "1480:23:7", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 2574, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1480:7:7", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2577, "mutability": "mutable", "name": "requestTypeHash", 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"ElementaryTypeName", "src": "1653:4:7", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2587, "mutability": "mutable", "name": "ret", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2653, "src": "1667:16:7", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 2586, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "1667:5:7", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "1652:32:7" }, "scope": 2934, "src": "1419:807:7", "stateMutability": "payable", "virtual": false, "visibility": "external" }, { "body": { "id": 2669, "nodeType": "Block", "src": "2296:73:7", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, 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