{ "fileName": "GSNRecipient.sol", "contractName": "GSNRecipient", "source": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.7.0;\n\nimport \"./IRelayRecipient.sol\";\nimport \"./IRelayHub.sol\";\nimport \"./Context.sol\";\n\n/**\n * @dev Base GSN recipient contract: includes the {IRelayRecipient} interface\n * and enables GSN support on all contracts in the inheritance tree.\n *\n * TIP: This contract is abstract. The functions {IRelayRecipient-acceptRelayedCall},\n * {_preRelayedCall}, and {_postRelayedCall} are not implemented and must be\n * provided by derived contracts. See the\n * xref:ROOT:gsn-strategies.adoc#gsn-strategies[GSN strategies] for more\n * information on how to use the pre-built {GSNRecipientSignature} and\n * {GSNRecipientERC20Fee}, or how to write your own.\n */\nabstract contract GSNRecipient is IRelayRecipient, Context {\n // Default RelayHub address, deployed on mainnet and all testnets at the same address\n address private _relayHub = 0xD216153c06E857cD7f72665E0aF1d7D82172F494;\n\n uint256 constant private _RELAYED_CALL_ACCEPTED = 0;\n uint256 constant private _RELAYED_CALL_REJECTED = 11;\n\n // How much gas is forwarded to postRelayedCall\n uint256 constant internal _POST_RELAYED_CALL_MAX_GAS = 100000;\n\n /**\n * @dev Emitted when a contract changes its {IRelayHub} contract to a new one.\n */\n event RelayHubChanged(address indexed oldRelayHub, address indexed newRelayHub);\n\n /**\n * @dev Returns the address of the {IRelayHub} contract for this recipient.\n */\n function getHubAddr() public view override returns (address) {\n return _relayHub;\n }\n\n /**\n * @dev Switches to a new {IRelayHub} instance. This method is added for future-proofing: there's no reason to not\n * use the default instance.\n *\n * IMPORTANT: After upgrading, the {GSNRecipient} will no longer be able to receive relayed calls from the old\n * {IRelayHub} instance. Additionally, all funds should be previously withdrawn via {_withdrawDeposits}.\n */\n function _upgradeRelayHub(address newRelayHub) internal virtual {\n address currentRelayHub = _relayHub;\n require(newRelayHub != address(0), \"GSNRecipient: new RelayHub is the zero address\");\n require(newRelayHub != currentRelayHub, \"GSNRecipient: new RelayHub is the current one\");\n\n emit RelayHubChanged(currentRelayHub, newRelayHub);\n\n _relayHub = newRelayHub;\n }\n\n /**\n * @dev Returns the version string of the {IRelayHub} for which this recipient implementation was built. If\n * {_upgradeRelayHub} is used, the new {IRelayHub} instance should be compatible with this version.\n */\n // This function is view for future-proofing, it may require reading from\n // storage in the future.\n function relayHubVersion() public view returns (string memory) {\n this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691\n return \"1.0.0\";\n }\n\n /**\n * @dev Withdraws the recipient's deposits in `RelayHub`.\n *\n * Derived contracts should expose this in an external interface with proper access control.\n */\n function _withdrawDeposits(uint256 amount, address payable payee) internal virtual {\n IRelayHub(_relayHub).withdraw(amount, payee);\n }\n\n // Overrides for Context's functions: when called from RelayHub, sender and\n // data require some pre-processing: the actual sender is stored at the end\n // of the call data, which in turns means it needs to be removed from it\n // when handling said data.\n\n /**\n * @dev Replacement for msg.sender. Returns the actual sender of a transaction: msg.sender for regular transactions,\n * and the end-user for GSN relayed calls (where msg.sender is actually `RelayHub`).\n *\n * IMPORTANT: Contracts derived from {GSNRecipient} should never use `msg.sender`, and use {_msgSender} instead.\n */\n function _msgSender() internal view virtual override returns (address payable) {\n if (msg.sender != _relayHub) {\n return msg.sender;\n } else {\n return _getRelayedCallSender();\n }\n }\n\n /**\n * @dev Replacement for msg.data. Returns the actual calldata of a transaction: msg.data for regular transactions,\n * and a reduced version for GSN relayed calls (where msg.data contains additional information).\n *\n * IMPORTANT: Contracts derived from {GSNRecipient} should never use `msg.data`, and use {_msgData} instead.\n */\n function _msgData() internal view virtual override returns (bytes memory) {\n if (msg.sender != _relayHub) {\n return msg.data;\n } else {\n return _getRelayedCallData();\n }\n }\n\n // Base implementations for pre and post relayedCall: only RelayHub can invoke them, and data is forwarded to the\n // internal hook.\n\n /**\n * @dev See `IRelayRecipient.preRelayedCall`.\n *\n * This function should not be overriden directly, use `_preRelayedCall` instead.\n *\n * * Requirements:\n *\n * - the caller must be the `RelayHub` contract.\n */\n function preRelayedCall(bytes memory context) public virtual override returns (bytes32) {\n require(msg.sender == getHubAddr(), \"GSNRecipient: caller is not RelayHub\");\n return _preRelayedCall(context);\n }\n\n /**\n * @dev See `IRelayRecipient.preRelayedCall`.\n *\n * Called by `GSNRecipient.preRelayedCall`, which asserts the caller is the `RelayHub` contract. Derived contracts\n * must implement this function with any relayed-call preprocessing they may wish to do.\n *\n */\n function _preRelayedCall(bytes memory context) internal virtual returns (bytes32);\n\n /**\n * @dev See `IRelayRecipient.postRelayedCall`.\n *\n * This function should not be overriden directly, use `_postRelayedCall` instead.\n *\n * * Requirements:\n *\n * - the caller must be the `RelayHub` contract.\n */\n function postRelayedCall(bytes memory context, bool success, uint256 actualCharge, bytes32 preRetVal) public virtual override {\n require(msg.sender == getHubAddr(), \"GSNRecipient: caller is not RelayHub\");\n _postRelayedCall(context, success, actualCharge, preRetVal);\n }\n\n /**\n * @dev See `IRelayRecipient.postRelayedCall`.\n *\n * Called by `GSNRecipient.postRelayedCall`, which asserts the caller is the `RelayHub` contract. Derived contracts\n * must implement this function with any relayed-call postprocessing they may wish to do.\n *\n */\n function _postRelayedCall(bytes memory context, bool success, uint256 actualCharge, bytes32 preRetVal) internal virtual;\n\n /**\n * @dev Return this in acceptRelayedCall to proceed with the execution of a relayed call. Note that this contract\n * will be charged a fee by RelayHub\n */\n function _approveRelayedCall() internal pure returns (uint256, bytes memory) {\n return _approveRelayedCall(\"\");\n }\n\n /**\n * @dev See `GSNRecipient._approveRelayedCall`.\n *\n * This overload forwards `context` to _preRelayedCall and _postRelayedCall.\n */\n function _approveRelayedCall(bytes memory context) internal pure returns (uint256, bytes memory) {\n return (_RELAYED_CALL_ACCEPTED, context);\n }\n\n /**\n * @dev Return this in acceptRelayedCall to impede execution of a relayed call. No fees will be charged.\n */\n function _rejectRelayedCall(uint256 errorCode) internal pure returns (uint256, bytes memory) {\n return (_RELAYED_CALL_REJECTED + errorCode, \"\");\n }\n\n /*\n * @dev Calculates how much RelayHub will charge a recipient for using `gas` at a `gasPrice`, given a relayer's\n * `serviceFee`.\n */\n function _computeCharge(uint256 gas, uint256 gasPrice, uint256 serviceFee) internal pure returns (uint256) {\n // The fee is expressed as a percentage. E.g. a value of 40 stands for a 40% fee, so the recipient will be\n // charged for 1.4 times the spent amount.\n return (gas * gasPrice * (100 + serviceFee)) / 100;\n }\n\n function _getRelayedCallSender() private pure returns (address payable result) {\n // We need to read 20 bytes (an address) located at array index msg.data.length - 20. In memory, the array\n // is prefixed with a 32-byte length value, so we first add 32 to get the memory read index. However, doing\n // so would leave the address in the upper 20 bytes of the 32-byte word, which is inconvenient and would\n // require bit shifting. We therefore subtract 12 from the read index so the address lands on the lower 20\n // bytes. This can always be done due to the 32-byte prefix.\n\n // The final memory read index is msg.data.length - 20 + 32 - 12 = msg.data.length. Using inline assembly is the\n // easiest/most-efficient way to perform this operation.\n\n // These fields are not accessible from assembly\n bytes memory array = msg.data;\n uint256 index = msg.data.length;\n\n // solhint-disable-next-line no-inline-assembly\n assembly {\n // Load the 32 bytes word from memory with the address on the lower 20 bytes, and mask those.\n result := and(mload(add(array, index)), 0xffffffffffffffffffffffffffffffffffffffff)\n }\n return result;\n }\n\n function _getRelayedCallData() private pure returns (bytes memory) {\n // RelayHub appends the sender address at the end of the calldata, so in order to retrieve the actual msg.data,\n // we must strip the last 20 bytes (length of an address type) from it.\n\n uint256 actualDataLength = msg.data.length - 20;\n bytes memory actualData = new bytes(actualDataLength);\n\n for (uint256 i = 0; i < actualDataLength; ++i) {\n actualData[i] = msg.data[i];\n }\n\n return actualData;\n }\n}\n", "sourcePath": "contracts/GSN/GSNRecipient.sol", "sourceMap": "", "deployedSourceMap": "", "abi": [ { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "oldRelayHub", "type": "address" }, { "indexed": true, "internalType": "address", "name": "newRelayHub", "type": "address" } ], "name": "RelayHubChanged", "type": "event" }, { "inputs": [ { "internalType": "address", "name": "relay", "type": "address" }, { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "bytes", "name": "encodedFunction", "type": "bytes" }, { "internalType": "uint256", "name": "transactionFee", "type": "uint256" }, { "internalType": "uint256", "name": "gasPrice", "type": "uint256" }, { "internalType": "uint256", "name": "gasLimit", "type": "uint256" }, { "internalType": "uint256", "name": "nonce", "type": "uint256" }, { "internalType": "bytes", "name": "approvalData", "type": "bytes" }, { "internalType": "uint256", "name": "maxPossibleCharge", "type": "uint256" } ], "name": "acceptRelayedCall", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" }, { "internalType": "bytes", "name": "", "type": "bytes" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "getHubAddr", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "bytes", "name": "context", "type": "bytes" }, { "internalType": "bool", "name": "success", "type": "bool" }, { "internalType": "uint256", "name": "actualCharge", "type": "uint256" }, { "internalType": "bytes32", "name": "preRetVal", "type": "bytes32" } ], "name": "postRelayedCall", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "bytes", "name": "context", "type": "bytes" } ], "name": "preRelayedCall", "outputs": [ { "internalType": "bytes32", "name": "", "type": "bytes32" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [], "name": "relayHubVersion", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" } ], "ast": { "absolutePath": "contracts/GSN/GSNRecipient.sol", "exportedSymbols": { "GSNRecipient": [ 375 ] }, "id": 376, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 24, "literals": [ "solidity", "^", "0.7", ".0" ], "nodeType": "PragmaDirective", "src": "33:23:1" }, { "absolutePath": "contracts/GSN/IRelayRecipient.sol", "file": "./IRelayRecipient.sol", "id": 25, "nodeType": "ImportDirective", "scope": 376, "sourceUnit": 1185, "src": "58:31:1", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "contracts/GSN/IRelayHub.sol", "file": "./IRelayHub.sol", "id": 26, "nodeType": "ImportDirective", "scope": 376, "sourceUnit": 1129, "src": "90:25:1", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "contracts/GSN/Context.sol", "file": "./Context.sol", "id": 27, "nodeType": "ImportDirective", "scope": 376, "sourceUnit": 23, "src": "116:23:1", "symbolAliases": [], "unitAlias": "" }, { "abstract": true, "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 29, "name": "IRelayRecipient", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 1184, "src": "736:15:1", "typeDescriptions": { "typeIdentifier": "t_contract$_IRelayRecipient_$1184", "typeString": "contract IRelayRecipient" } }, "id": 30, "nodeType": "InheritanceSpecifier", "src": "736:15:1" }, { "arguments": null, "baseName": { "contractScope": null, "id": 31, "name": "Context", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 22, "src": "753:7:1", "typeDescriptions": { "typeIdentifier": "t_contract$_Context_$22", "typeString": "contract Context" } }, "id": 32, "nodeType": "InheritanceSpecifier", "src": "753:7:1" } ], "contractDependencies": [ 22, 1184 ], "contractKind": "contract", "documentation": { "id": 28, "nodeType": "StructuredDocumentation", "src": "141:560:1", "text": " @dev Base GSN recipient contract: includes the {IRelayRecipient} interface\n and enables GSN support on all contracts in the inheritance tree.\n TIP: This contract is abstract. The functions {IRelayRecipient-acceptRelayedCall},\n {_preRelayedCall}, and {_postRelayedCall} are not implemented and must be\n provided by derived contracts. See the\n xref:ROOT:gsn-strategies.adoc#gsn-strategies[GSN strategies] for more\n information on how to use the pre-built {GSNRecipientSignature} and\n {GSNRecipientERC20Fee}, or how to write your own." }, "fullyImplemented": false, "id": 375, "linearizedBaseContracts": [ 375, 22, 1184 ], "name": "GSNRecipient", "nodeType": "ContractDefinition", "nodes": [ { "constant": false, "id": 35, "mutability": "mutable", "name": "_relayHub", "nodeType": "VariableDeclaration", "overrides": null, "scope": 375, "src": "857:70:1", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 33, "name": "address", "nodeType": "ElementaryTypeName", "src": "857:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": { "argumentTypes": null, "hexValue": "307844323136313533633036453835376344376637323636354530614631643744383231373246343934", "id": 34, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "885:42:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, "value": "0xD216153c06E857cD7f72665E0aF1d7D82172F494" }, "visibility": "private" }, { "constant": true, "id": 38, "mutability": "constant", "name": "_RELAYED_CALL_ACCEPTED", "nodeType": "VariableDeclaration", "overrides": null, "scope": 375, "src": "934:51:1", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 36, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "934:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": { "argumentTypes": null, "hexValue": "30", "id": 37, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "984:1:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "visibility": "private" }, { "constant": true, "id": 41, "mutability": "constant", "name": "_RELAYED_CALL_REJECTED", "nodeType": "VariableDeclaration", "overrides": null, "scope": 375, "src": "991:52:1", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 39, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "991:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": { "argumentTypes": null, "hexValue": "3131", "id": 40, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1041:2:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_11_by_1", "typeString": "int_const 11" }, "value": "11" }, "visibility": "private" }, { "constant": true, "id": 44, "mutability": "constant", "name": "_POST_RELAYED_CALL_MAX_GAS", "nodeType": "VariableDeclaration", "overrides": null, "scope": 375, "src": "1102:61:1", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 42, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "1102:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": { "argumentTypes": null, "hexValue": "313030303030", "id": 43, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1157:6:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_100000_by_1", "typeString": "int_const 100000" }, "value": "100000" }, "visibility": "internal" }, { "anonymous": false, "documentation": { "id": 45, "nodeType": "StructuredDocumentation", "src": "1170:94:1", "text": " @dev Emitted when a contract changes its {IRelayHub} contract to a new one." }, "id": 51, "name": "RelayHubChanged", "nodeType": "EventDefinition", "parameters": { "id": 50, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 47, "indexed": true, "mutability": "mutable", "name": "oldRelayHub", "nodeType": "VariableDeclaration", "overrides": null, "scope": 51, "src": "1291:27:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 46, "name": "address", "nodeType": "ElementaryTypeName", "src": "1291:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 49, "indexed": true, "mutability": "mutable", "name": "newRelayHub", "nodeType": "VariableDeclaration", "overrides": null, "scope": 51, "src": "1320:27:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 48, "name": "address", "nodeType": "ElementaryTypeName", "src": "1320:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "1290:58:1" }, "src": "1269:80:1" }, { "baseFunctions": [ 1137 ], "body": { "id": 60, "nodeType": "Block", "src": "1512:33:1", "statements": [ { "expression": { "argumentTypes": null, "id": 58, "name": "_relayHub", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 35, "src": "1529:9:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 57, "id": 59, "nodeType": "Return", "src": "1522:16:1" } ] }, "documentation": { "id": 52, "nodeType": "StructuredDocumentation", "src": "1355:91:1", "text": " @dev Returns the address of the {IRelayHub} contract for this recipient." }, "functionSelector": "74e861d6", "id": 61, "implemented": true, "kind": "function", "modifiers": [], "name": "getHubAddr", "nodeType": "FunctionDefinition", "overrides": { "id": 54, "nodeType": "OverrideSpecifier", "overrides": [], "src": "1485:8:1" }, "parameters": { "id": 53, "nodeType": "ParameterList", "parameters": [], "src": "1470:2:1" }, "returnParameters": { "id": 57, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 56, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 61, "src": "1503:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 55, "name": "address", "nodeType": "ElementaryTypeName", "src": "1503:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "1502:9:1" }, "scope": 375, "src": "1451:94:1", "stateMutability": "view", "virtual": false, "visibility": "public" }, { "body": { "id": 97, "nodeType": "Block", "src": "2014:339:1", "statements": [ { "assignments": [ 68 ], "declarations": [ { "constant": false, "id": 68, "mutability": "mutable", "name": "currentRelayHub", "nodeType": "VariableDeclaration", "overrides": null, "scope": 97, "src": "2024:23:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 67, "name": "address", "nodeType": "ElementaryTypeName", "src": "2024:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "id": 70, "initialValue": { "argumentTypes": null, "id": 69, "name": "_relayHub", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 35, "src": "2050:9:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "2024:35:1" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 77, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 72, "name": "newRelayHub", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 64, "src": "2077:11:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 75, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2100:1:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 74, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2092:7:1", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 73, "name": "address", "nodeType": "ElementaryTypeName", "src": "2092:7:1", "typeDescriptions": { "typeIdentifier": null, "typeString": null } } }, "id": 76, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2092:10:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "2077:25:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "47534e526563697069656e743a206e65772052656c617948756220697320746865207a65726f2061646472657373", "id": 78, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2104:48:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_6f491055395682510b2d42bd98bb3e1d6b09e7412a20297798e6a1eaf3a959fc", "typeString": "literal_string \"GSNRecipient: new RelayHub is the zero address\"" }, "value": "GSNRecipient: new RelayHub is the zero address" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_6f491055395682510b2d42bd98bb3e1d6b09e7412a20297798e6a1eaf3a959fc", "typeString": "literal_string \"GSNRecipient: new RelayHub is the zero address\"" } ], "id": 71, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "2069:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 79, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2069:84:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 80, "nodeType": "ExpressionStatement", "src": "2069:84:1" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 84, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 82, "name": "newRelayHub", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 64, "src": "2171:11:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "id": 83, "name": "currentRelayHub", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 68, "src": "2186:15:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "2171:30:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "47534e526563697069656e743a206e65772052656c6179487562206973207468652063757272656e74206f6e65", "id": 85, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2203:47:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_a813abdd30d501e1e20e9af7c88309a559a778de193d0ada7263f2d66933ec3e", "typeString": "literal_string \"GSNRecipient: new RelayHub is the current one\"" }, "value": "GSNRecipient: new RelayHub is the current one" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_a813abdd30d501e1e20e9af7c88309a559a778de193d0ada7263f2d66933ec3e", "typeString": "literal_string \"GSNRecipient: new RelayHub is the current one\"" } ], "id": 81, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "2163:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 86, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2163:88:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 87, "nodeType": "ExpressionStatement", "src": "2163:88:1" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 89, "name": "currentRelayHub", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 68, "src": "2283:15:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 90, "name": "newRelayHub", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 64, "src": "2300:11:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 88, "name": "RelayHubChanged", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 51, "src": "2267:15:1", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$returns$__$", "typeString": "function (address,address)" } }, "id": 91, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2267:45:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 92, "nodeType": "EmitStatement", "src": "2262:50:1" }, { "expression": { "argumentTypes": null, "id": 95, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 93, "name": "_relayHub", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 35, "src": "2323:9:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 94, "name": "newRelayHub", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 64, "src": "2335:11:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "2323:23:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 96, "nodeType": "ExpressionStatement", "src": "2323:23:1" } ] }, "documentation": { "id": 62, "nodeType": "StructuredDocumentation", "src": "1551:394:1", "text": " @dev Switches to a new {IRelayHub} instance. This method is added for future-proofing: there's no reason to not\n use the default instance.\n IMPORTANT: After upgrading, the {GSNRecipient} will no longer be able to receive relayed calls from the old\n {IRelayHub} instance. Additionally, all funds should be previously withdrawn via {_withdrawDeposits}." }, "id": 98, "implemented": true, "kind": "function", "modifiers": [], "name": "_upgradeRelayHub", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 65, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 64, "mutability": "mutable", "name": "newRelayHub", "nodeType": "VariableDeclaration", "overrides": null, "scope": 98, "src": "1976:19:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 63, "name": "address", "nodeType": "ElementaryTypeName", "src": "1976:7:1", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "1975:21:1" }, "returnParameters": { "id": 66, "nodeType": "ParameterList", "parameters": [], "src": "2014:0:1" }, "scope": 375, "src": "1950:403:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 108, "nodeType": "Block", "src": "2762:164:1", "statements": [ { "expression": { "argumentTypes": null, "id": 104, "name": "this", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -28, "src": "2772:4:1", "typeDescriptions": { "typeIdentifier": "t_contract$_GSNRecipient_$375", "typeString": "contract GSNRecipient" } }, "id": 105, "nodeType": "ExpressionStatement", "src": "2772:4:1" }, { "expression": { "argumentTypes": null, "hexValue": "312e302e30", "id": 106, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2912:7:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_06c015bd22b4c69690933c1058878ebdfef31f9aaae40bbe86d8a09fe1b2972c", "typeString": "literal_string \"1.0.0\"" }, "value": "1.0.0" }, "functionReturnParameters": 103, "id": 107, "nodeType": "Return", "src": "2905:14:1" } ] }, "documentation": { "id": 99, "nodeType": "StructuredDocumentation", "src": "2359:227:1", "text": " @dev Returns the version string of the {IRelayHub} for which this recipient implementation was built. If\n {_upgradeRelayHub} is used, the new {IRelayHub} instance should be compatible with this version." }, "functionSelector": "ad61ccd5", "id": 109, "implemented": true, "kind": "function", "modifiers": [], "name": "relayHubVersion", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 100, "nodeType": "ParameterList", "parameters": [], "src": "2723:2:1" }, "returnParameters": { "id": 103, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 102, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 109, "src": "2747:13:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 101, "name": "string", "nodeType": "ElementaryTypeName", "src": "2747:6:1", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": null, "visibility": "internal" } ], "src": "2746:15:1" }, "scope": 375, "src": "2699:227:1", "stateMutability": "view", "virtual": false, "visibility": "public" }, { "body": { "id": 125, "nodeType": "Block", "src": "3197:61:1", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 121, "name": "amount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 112, "src": "3237:6:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 122, "name": "payee", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 114, "src": "3245:5:1", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" } ], "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 118, "name": "_relayHub", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 35, "src": "3217:9:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 117, "name": "IRelayHub", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1128, "src": "3207:9:1", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_IRelayHub_$1128_$", "typeString": "type(contract IRelayHub)" } }, "id": 119, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3207:20:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_contract$_IRelayHub_$1128", "typeString": "contract IRelayHub" } }, "id": 120, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "withdraw", "nodeType": "MemberAccess", "referencedDeclaration": 971, "src": "3207:29:1", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_uint256_$_t_address_payable_$returns$__$", "typeString": "function (uint256,address payable) external" } }, "id": 123, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3207:44:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 124, "nodeType": "ExpressionStatement", "src": "3207:44:1" } ] }, "documentation": { "id": 110, "nodeType": "StructuredDocumentation", "src": "2932:177:1", "text": " @dev Withdraws the recipient's deposits in `RelayHub`.\n Derived contracts should expose this in an external interface with proper access control." }, "id": 126, "implemented": true, "kind": "function", "modifiers": [], "name": "_withdrawDeposits", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 115, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 112, "mutability": "mutable", "name": "amount", "nodeType": "VariableDeclaration", "overrides": null, "scope": 126, "src": "3141:14:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 111, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3141:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 114, "mutability": "mutable", "name": "payee", "nodeType": "VariableDeclaration", "overrides": null, "scope": 126, "src": "3157:21:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, "typeName": { "id": 113, "name": "address", "nodeType": "ElementaryTypeName", "src": "3157:15:1", "stateMutability": "payable", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "value": null, "visibility": "internal" } ], "src": "3140:39:1" }, "returnParameters": { "id": 116, "nodeType": "ParameterList", "parameters": [], "src": "3197:0:1" }, "scope": 375, "src": "3114:144:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "baseFunctions": [ 10 ], "body": { "id": 146, "nodeType": "Block", "src": "3963:148:1", "statements": [ { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 136, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 133, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -15, "src": "3977:3:1", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 134, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "3977:10:1", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "id": 135, "name": "_relayHub", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 35, "src": "3991:9:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "3977:23:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": { "id": 144, "nodeType": "Block", "src": "4050:55:1", "statements": [ { "expression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 141, "name": "_getRelayedCallSender", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 330, "src": "4071:21:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$__$returns$_t_address_payable_$", "typeString": "function () pure returns (address payable)" } }, "id": 142, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4071:23:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 132, "id": 143, "nodeType": "Return", "src": "4064:30:1" } ] }, "id": 145, "nodeType": "IfStatement", "src": "3973:132:1", "trueBody": { "id": 140, "nodeType": "Block", "src": "4002:42:1", "statements": [ { "expression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 137, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -15, "src": "4023:3:1", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 138, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4023:10:1", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 132, "id": 139, "nodeType": "Return", "src": "4016:17:1" } ] } } ] }, "documentation": { "id": 127, "nodeType": "StructuredDocumentation", "src": "3534:345:1", "text": " @dev Replacement for msg.sender. Returns the actual sender of a transaction: msg.sender for regular transactions,\n and the end-user for GSN relayed calls (where msg.sender is actually `RelayHub`).\n IMPORTANT: Contracts derived from {GSNRecipient} should never use `msg.sender`, and use {_msgSender} instead." }, "id": 147, "implemented": true, "kind": "function", "modifiers": [], "name": "_msgSender", "nodeType": "FunctionDefinition", "overrides": { "id": 129, "nodeType": "OverrideSpecifier", "overrides": [], "src": "3928:8:1" }, "parameters": { "id": 128, "nodeType": "ParameterList", "parameters": [], "src": "3903:2:1" }, "returnParameters": { "id": 132, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 131, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 147, "src": "3946:15:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" }, "typeName": { "id": 130, "name": "address", "nodeType": "ElementaryTypeName", "src": "3946:15:1", "stateMutability": "payable", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "value": null, "visibility": "internal" } ], "src": "3945:17:1" }, "scope": 375, "src": "3884:227:1", "stateMutability": "view", "virtual": true, "visibility": "internal" }, { "baseFunctions": [ 21 ], "body": { "id": 167, "nodeType": "Block", "src": "4547:144:1", "statements": [ { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 157, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 154, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -15, "src": "4561:3:1", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 155, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4561:10:1", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "id": 156, "name": "_relayHub", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 35, "src": "4575:9:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "4561:23:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": { "id": 165, "nodeType": "Block", "src": "4632:53:1", "statements": [ { "expression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 162, "name": "_getRelayedCallData", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 374, "src": "4653:19:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 163, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4653:21:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "functionReturnParameters": 153, "id": 164, "nodeType": "Return", "src": "4646:28:1" } ] }, "id": 166, "nodeType": "IfStatement", "src": "4557:128:1", "trueBody": { "id": 161, "nodeType": "Block", "src": "4586:40:1", "statements": [ { "expression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 158, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -15, "src": "4607:3:1", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 159, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "data", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4607:8:1", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } }, "functionReturnParameters": 153, "id": 160, "nodeType": "Return", "src": "4600:15:1" } ] } } ] }, "documentation": { "id": 148, "nodeType": "StructuredDocumentation", "src": "4117:351:1", "text": " @dev Replacement for msg.data. Returns the actual calldata of a transaction: msg.data for regular transactions,\n and a reduced version for GSN relayed calls (where msg.data contains additional information).\n IMPORTANT: Contracts derived from {GSNRecipient} should never use `msg.data`, and use {_msgData} instead." }, "id": 168, "implemented": true, "kind": "function", "modifiers": [], "name": "_msgData", "nodeType": "FunctionDefinition", "overrides": { "id": 150, "nodeType": "OverrideSpecifier", "overrides": [], "src": "4515:8:1" }, "parameters": { "id": 149, "nodeType": "ParameterList", "parameters": [], "src": "4490:2:1" }, "returnParameters": { "id": 153, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 152, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 168, "src": "4533:12:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 151, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "4533:5:1", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "4532:14:1" }, "scope": 375, "src": "4473:218:1", "stateMutability": "view", "virtual": true, "visibility": "internal" }, { "baseFunctions": [ 1171 ], "body": { "id": 190, "nodeType": "Block", "src": "5175:133:1", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 182, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 178, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -15, "src": "5193:3:1", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 179, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "5193:10:1", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 180, "name": "getHubAddr", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 61, "src": "5207:10:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 181, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5207:12:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "5193:26:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "47534e526563697069656e743a2063616c6c6572206973206e6f742052656c6179487562", "id": 183, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "5221:38:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_c5a8631418fdde7d8bd9088d1be86b076bc07c8b187afcea36c0a6e10c88ab53", "typeString": "literal_string \"GSNRecipient: caller is not RelayHub\"" }, "value": "GSNRecipient: caller is not RelayHub" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_c5a8631418fdde7d8bd9088d1be86b076bc07c8b187afcea36c0a6e10c88ab53", "typeString": "literal_string \"GSNRecipient: caller is not RelayHub\"" } ], "id": 177, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "5185:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 184, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5185:75:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 185, "nodeType": "ExpressionStatement", "src": "5185:75:1" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 187, "name": "context", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 171, "src": "5293:7:1", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 186, "name": "_preRelayedCall", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 199, "src": "5277:15:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) returns (bytes32)" } }, "id": 188, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5277:24:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "functionReturnParameters": 176, "id": 189, "nodeType": "Return", "src": "5270:31:1" } ] }, "documentation": { "id": 169, "nodeType": "StructuredDocumentation", "src": "4838:244:1", "text": " @dev See `IRelayRecipient.preRelayedCall`.\n This function should not be overriden directly, use `_preRelayedCall` instead.\n * Requirements:\n - the caller must be the `RelayHub` contract." }, "functionSelector": "80274db7", "id": 191, "implemented": true, "kind": "function", "modifiers": [], "name": "preRelayedCall", "nodeType": "FunctionDefinition", "overrides": { "id": 173, "nodeType": "OverrideSpecifier", "overrides": [], "src": "5148:8:1" }, "parameters": { "id": 172, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 171, "mutability": "mutable", "name": "context", "nodeType": "VariableDeclaration", "overrides": null, "scope": 191, "src": "5111:20:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 170, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "5111:5:1", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "5110:22:1" }, "returnParameters": { "id": 176, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 175, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 191, "src": "5166:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 174, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "5166:7:1", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "5165:9:1" }, "scope": 375, "src": "5087:221:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": null, "documentation": { "id": 192, "nodeType": "StructuredDocumentation", "src": "5314:287:1", "text": " @dev See `IRelayRecipient.preRelayedCall`.\n Called by `GSNRecipient.preRelayedCall`, which asserts the caller is the `RelayHub` contract. Derived contracts\n must implement this function with any relayed-call preprocessing they may wish to do." }, "id": 199, "implemented": false, "kind": "function", "modifiers": [], "name": "_preRelayedCall", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 195, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 194, "mutability": "mutable", "name": "context", "nodeType": "VariableDeclaration", "overrides": null, "scope": 199, "src": "5631:20:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 193, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "5631:5:1", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "5630:22:1" }, "returnParameters": { "id": 198, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 197, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 199, "src": "5679:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 196, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "5679:7:1", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "5678:9:1" }, "scope": 375, "src": "5606:82:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "baseFunctions": [ 1183 ], "body": { "id": 228, "nodeType": "Block", "src": "6071:161:1", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 217, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 213, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -15, "src": "6089:3:1", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 214, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "sender", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "6089:10:1", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 215, "name": "getHubAddr", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 61, "src": "6103:10:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$", "typeString": "function () view returns (address)" } }, "id": 216, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6103:12:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "6089:26:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "47534e526563697069656e743a2063616c6c6572206973206e6f742052656c6179487562", "id": 218, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6117:38:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_c5a8631418fdde7d8bd9088d1be86b076bc07c8b187afcea36c0a6e10c88ab53", "typeString": "literal_string \"GSNRecipient: caller is not RelayHub\"" }, "value": "GSNRecipient: caller is not RelayHub" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_c5a8631418fdde7d8bd9088d1be86b076bc07c8b187afcea36c0a6e10c88ab53", "typeString": "literal_string \"GSNRecipient: caller is not RelayHub\"" } ], "id": 212, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "6081:7:1", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 219, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6081:75:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 220, "nodeType": "ExpressionStatement", "src": "6081:75:1" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 222, "name": "context", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 202, "src": "6183:7:1", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "argumentTypes": null, "id": 223, "name": "success", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 204, "src": "6192:7:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "id": 224, "name": "actualCharge", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 206, "src": "6201:12:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 225, "name": "preRetVal", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 208, "src": "6215:9:1", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_uint256", "typeString": "uint256" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 221, "name": "_postRelayedCall", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 241, "src": "6166:16:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_bytes_memory_ptr_$_t_bool_$_t_uint256_$_t_bytes32_$returns$__$", "typeString": "function (bytes memory,bool,uint256,bytes32)" } }, "id": 226, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6166:59:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 227, "nodeType": "ExpressionStatement", "src": "6166:59:1" } ] }, "documentation": { "id": 200, "nodeType": "StructuredDocumentation", "src": "5694:246:1", "text": " @dev See `IRelayRecipient.postRelayedCall`.\n This function should not be overriden directly, use `_postRelayedCall` instead.\n * Requirements:\n - the caller must be the `RelayHub` contract." }, "functionSelector": "e06e0e22", "id": 229, "implemented": true, "kind": "function", "modifiers": [], "name": "postRelayedCall", "nodeType": "FunctionDefinition", "overrides": { "id": 210, "nodeType": "OverrideSpecifier", "overrides": [], "src": "6062:8:1" }, "parameters": { "id": 209, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 202, "mutability": "mutable", "name": "context", "nodeType": "VariableDeclaration", "overrides": null, "scope": 229, "src": "5970:20:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 201, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "5970:5:1", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 204, "mutability": "mutable", "name": "success", "nodeType": "VariableDeclaration", "overrides": null, "scope": 229, "src": "5992:12:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 203, "name": "bool", "nodeType": "ElementaryTypeName", "src": "5992:4:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 206, "mutability": "mutable", "name": "actualCharge", "nodeType": "VariableDeclaration", "overrides": null, "scope": 229, "src": "6006:20:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 205, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6006:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 208, "mutability": "mutable", "name": "preRetVal", "nodeType": "VariableDeclaration", "overrides": null, "scope": 229, "src": "6028:17:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 207, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "6028:7:1", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "5969:77:1" }, "returnParameters": { "id": 211, "nodeType": "ParameterList", "parameters": [], "src": "6071:0:1" }, "scope": 375, "src": "5945:287:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "public" }, { "body": null, "documentation": { "id": 230, "nodeType": "StructuredDocumentation", "src": "6238:290:1", "text": " @dev See `IRelayRecipient.postRelayedCall`.\n Called by `GSNRecipient.postRelayedCall`, which asserts the caller is the `RelayHub` contract. Derived contracts\n must implement this function with any relayed-call postprocessing they may wish to do." }, "id": 241, "implemented": false, "kind": "function", "modifiers": [], "name": "_postRelayedCall", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 239, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 232, "mutability": "mutable", "name": "context", "nodeType": "VariableDeclaration", "overrides": null, "scope": 241, "src": "6559:20:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 231, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "6559:5:1", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 234, "mutability": "mutable", "name": "success", "nodeType": "VariableDeclaration", "overrides": null, "scope": 241, "src": "6581:12:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 233, "name": "bool", "nodeType": "ElementaryTypeName", "src": "6581:4:1", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 236, "mutability": "mutable", "name": "actualCharge", "nodeType": "VariableDeclaration", "overrides": null, "scope": 241, "src": "6595:20:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 235, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6595:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 238, "mutability": "mutable", "name": "preRetVal", "nodeType": "VariableDeclaration", "overrides": null, "scope": 241, "src": "6617:17:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 237, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "6617:7:1", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "6558:77:1" }, "returnParameters": { "id": 240, "nodeType": "ParameterList", "parameters": [], "src": "6652:0:1" }, "scope": 375, "src": "6533:120:1", "stateMutability": "nonpayable", "virtual": true, "visibility": "internal" }, { "body": { "id": 253, "nodeType": "Block", "src": "6911:47:1", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "", "id": 250, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "6948:2:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\"" }, "value": "" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\"" } ], "id": 249, "name": "_approveRelayedCall", "nodeType": "Identifier", "overloadedDeclarations": [ 254, 269 ], "referencedDeclaration": 269, "src": "6928:19:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes_memory_ptr_$returns$_t_uint256_$_t_bytes_memory_ptr_$", "typeString": "function (bytes memory) pure returns (uint256,bytes memory)" } }, "id": 251, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6928:23:1", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$_t_uint256_$_t_bytes_memory_ptr_$", "typeString": "tuple(uint256,bytes memory)" } }, "functionReturnParameters": 248, "id": 252, "nodeType": "Return", "src": "6921:30:1" } ] }, "documentation": { "id": 242, "nodeType": "StructuredDocumentation", "src": "6659:170:1", "text": " @dev Return this in acceptRelayedCall to proceed with the execution of a relayed call. Note that this contract\n will be charged a fee by RelayHub" }, "id": 254, "implemented": true, "kind": "function", "modifiers": [], "name": "_approveRelayedCall", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 243, "nodeType": "ParameterList", "parameters": [], "src": "6862:2:1" }, "returnParameters": { "id": 248, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 245, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 254, "src": "6888:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 244, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6888:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 247, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 254, "src": "6897:12:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 246, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "6897:5:1", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "6887:23:1" }, "scope": 375, "src": "6834:124:1", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 268, "nodeType": "Block", "src": "7217:57:1", "statements": [ { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "id": 264, "name": "_RELAYED_CALL_ACCEPTED", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 38, "src": "7235:22:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "id": 265, "name": "context", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 257, "src": "7259:7:1", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "id": 266, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "7234:33:1", "typeDescriptions": { "typeIdentifier": "t_tuple$_t_uint256_$_t_bytes_memory_ptr_$", "typeString": "tuple(uint256,bytes memory)" } }, "functionReturnParameters": 263, "id": 267, "nodeType": "Return", "src": "7227:40:1" } ] }, "documentation": { "id": 255, "nodeType": "StructuredDocumentation", "src": "6964:151:1", "text": " @dev See `GSNRecipient._approveRelayedCall`.\n This overload forwards `context` to _preRelayedCall and _postRelayedCall." }, "id": 269, "implemented": true, "kind": "function", "modifiers": [], "name": "_approveRelayedCall", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 258, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 257, "mutability": "mutable", "name": "context", "nodeType": "VariableDeclaration", "overrides": null, "scope": 269, "src": "7149:20:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 256, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "7149:5:1", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "7148:22:1" }, "returnParameters": { "id": 263, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 260, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 269, "src": "7194:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 259, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7194:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 262, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 269, "src": "7203:12:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 261, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "7203:5:1", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "7193:23:1" }, "scope": 375, "src": "7120:154:1", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 285, "nodeType": "Block", "src": "7498:64:1", "statements": [ { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 281, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 279, "name": "_RELAYED_CALL_REJECTED", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 41, "src": "7516:22:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "argumentTypes": null, "id": 280, "name": "errorCode", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 272, "src": "7541:9:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "7516:34:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, { "argumentTypes": null, "hexValue": "", "id": 282, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "7552:2:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470", "typeString": "literal_string \"\"" }, "value": "" } ], "id": 283, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "7515:40:1", "typeDescriptions": { "typeIdentifier": "t_tuple$_t_uint256_$_t_stringliteral_c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470_$", "typeString": "tuple(uint256,literal_string \"\")" } }, "functionReturnParameters": 278, "id": 284, "nodeType": "Return", "src": "7508:47:1" } ] }, "documentation": { "id": 270, "nodeType": "StructuredDocumentation", "src": "7280:120:1", "text": " @dev Return this in acceptRelayedCall to impede execution of a relayed call. No fees will be charged." }, "id": 286, "implemented": true, "kind": "function", "modifiers": [], "name": "_rejectRelayedCall", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 273, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 272, "mutability": "mutable", "name": "errorCode", "nodeType": "VariableDeclaration", "overrides": null, "scope": 286, "src": "7433:17:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 271, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7433:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "7432:19:1" }, "returnParameters": { "id": 278, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 275, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 286, "src": "7475:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 274, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7475:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 277, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 286, "src": "7484:12:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 276, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "7484:5:1", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "7474:23:1" }, "scope": 375, "src": "7405:157:1", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 309, "nodeType": "Block", "src": "7827:233:1", "statements": [ { "expression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 307, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 304, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 299, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 297, "name": "gas", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 288, "src": "8011:3:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "*", "rightExpression": { "argumentTypes": null, "id": 298, "name": "gasPrice", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 290, "src": "8017:8:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8011:14:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "*", "rightExpression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 302, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "hexValue": "313030", "id": 300, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8029:3:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_100_by_1", "typeString": "int_const 100" }, "value": "100" }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "argumentTypes": null, "id": 301, "name": "serviceFee", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 292, "src": "8035:10:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8029:16:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "id": 303, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "8028:18:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "8011:35:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "id": 305, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "8010:37:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "/", "rightExpression": { "argumentTypes": null, "hexValue": "313030", "id": 306, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "8050:3:1", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_100_by_1", "typeString": "int_const 100" }, "value": "100" }, "src": "8010:43:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 296, "id": 308, "nodeType": "Return", "src": "8003:50:1" } ] }, "documentation": null, "id": 310, "implemented": true, "kind": "function", "modifiers": [], "name": "_computeCharge", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 293, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 288, "mutability": "mutable", "name": "gas", "nodeType": "VariableDeclaration", "overrides": null, "scope": 310, "src": "7744:11:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 287, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7744:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 290, "mutability": "mutable", "name": "gasPrice", "nodeType": "VariableDeclaration", "overrides": null, "scope": 310, "src": "7757:16:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 289, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7757:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 292, "mutability": "mutable", "name": "serviceFee", "nodeType": "VariableDeclaration", "overrides": null, "scope": 310, "src": "7775:18:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 291, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7775:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "7743:51:1" }, "returnParameters": { "id": 296, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 295, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 310, "src": "7818:7:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 294, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "7818:7:1", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "7817:9:1" }, "scope": 375, "src": "7720:340:1", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 329, "nodeType": "Block", "src": "8145:1171:1", "statements": [ { "assignments": [ 316 ], "declarations": [ { "constant": false, "id": 316, "mutability": "mutable", "name": "array", "nodeType": "VariableDeclaration", "overrides": null, "scope": 329, "src": "8928:18:1", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 315, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "8928:5:1", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "id": 319, "initialValue": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 317, "name": "msg", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -15, "src": "8949:3:1", "typeDescriptions": { "typeIdentifier": "t_magic_message", "typeString": "msg" } }, "id": 318, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "data", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "8949:8:1", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } }, "nodeType": "VariableDeclarationStatement", "src": "8928:29:1" }, { "assignments": [ 321 ], "declarations": [ { "constant": false, "id": 321, "mutability": "mutable", "name": "index", "nodeType": "VariableDeclaration", "overrides": null, "scope": 329, "src": "8967:13:1", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, 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