{ "contractName": "ECDSA", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.5.8+commit.23d335f2\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"details\":\"Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * These functions can be used to verify that a message was signed by the holder of the private keys of a given address.\",\"methods\":{}},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"openzeppelin-solidity/contracts/cryptography/ECDSA.sol\":\"ECDSA\"},\"evmVersion\":\"constantinople\",\"libraries\":{},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"openzeppelin-solidity/contracts/cryptography/ECDSA.sol\":{\"keccak256\":\"0xc19027309407a962d4d5f68ad3e5c31eab6ffb6b134dd4811fd0f3d93ffd618a\",\"urls\":[\"bzzr://0fd21475ca178757005990869d51729368cbebd5f0222656141b4fbe5e12a363\"]}},\"version\":1}", "bytecode": "0x604c6023600b82828239805160001a607314601657fe5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea165627a7a7230582055b56ab93b15997f404c16f6970493e31d43ecac5c02802807665fb76d95f06a0029", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea165627a7a7230582055b56ab93b15997f404c16f6970493e31d43ecac5c02802807665fb76d95f06a0029", "sourceMap": "231:3422:13:-;;132:2:-1;166:7;155:9;146:7;137:37;255:7;249:14;246:1;241:23;235:4;232:33;222:2;;269:9;222:2;293:9;290:1;283:20;323:4;314:7;306:22;347:7;338;331:24", "deployedSourceMap": "231:3422:13:-;;;;;;;;", "source": "pragma solidity ^0.5.0;\n\n/**\n * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.\n *\n * These functions can be used to verify that a message was signed by the holder\n * of the private keys of a given address.\n */\nlibrary ECDSA {\n /**\n * @dev Returns the address that signed a hashed message (`hash`) with\n * `signature`. This address can then be used for verification purposes.\n *\n * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n * this function rejects them by requiring the `s` value to be in the lower\n * half order, and the `v` value to be either 27 or 28.\n *\n * (.note) This call _does not revert_ if the signature is invalid, or\n * if the signer is otherwise unable to be retrieved. In those scenarios,\n * the zero address is returned.\n *\n * (.warning) `hash` _must_ be the result of a hash operation for the\n * verification to be secure: it is possible to craft signatures that\n * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n * this is by receiving a hash of the original message (which may otherwise)\n * be too long), and then calling `toEthSignedMessageHash` on it.\n */\n function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {\n // Check the signature length\n if (signature.length != 65) {\n return (address(0));\n }\n\n // Divide the signature in r, s and v variables\n bytes32 r;\n bytes32 s;\n uint8 v;\n\n // ecrecover takes the signature parameters, and the only way to get them\n // currently is to use assembly.\n // solhint-disable-next-line no-inline-assembly\n assembly {\n r := mload(add(signature, 0x20))\n s := mload(add(signature, 0x40))\n v := byte(0, mload(add(signature, 0x60)))\n }\n\n // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature\n // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines\n // the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most\n // signatures from current libraries generate a unique signature with an s-value in the lower half order.\n //\n // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value\n // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or\n // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept\n // these malleable signatures as well.\n if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {\n return address(0);\n }\n\n if (v != 27 && v != 28) {\n return address(0);\n }\n\n // If the signature is valid (and not malleable), return the signer address\n return ecrecover(hash, v, r, s);\n }\n\n /**\n * @dev Returns an Ethereum Signed Message, created from a `hash`. This\n * replicates the behavior of the\n * [`eth_sign`](https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign)\n * JSON-RPC method.\n *\n * See `recover`.\n */\n function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {\n // 32 is the length in bytes of hash,\n // enforced by the type signature above\n return keccak256(abi.encodePacked(\"\\x19Ethereum Signed Message:\\n32\", hash));\n }\n}\n", "sourcePath": "openzeppelin-solidity/contracts/cryptography/ECDSA.sol", "ast": { "absolutePath": "openzeppelin-solidity/contracts/cryptography/ECDSA.sol", "exportedSymbols": { "ECDSA": [ 4050 ] }, "id": 4051, "nodeType": "SourceUnit", "nodes": [ { "id": 3971, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:13" }, { "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": "@dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.\n * These functions can be used to verify that a message was signed by the holder\nof the private keys of a given address.", "fullyImplemented": true, "id": 4050, "linearizedBaseContracts": [ 4050 ], "name": "ECDSA", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 4032, "nodeType": "Block", "src": "1316:1804:13", "statements": [ { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 3983, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 3980, "name": "signature", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3975, "src": "1368:9:13", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 3981, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "1368:16:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3635", "id": 3982, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1388:2:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_65_by_1", "typeString": "int_const 65" }, "value": "65" }, "src": "1368:22:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 3990, "nodeType": "IfStatement", "src": "1364:72:13", "trueBody": { "id": 3989, "nodeType": "Block", "src": "1392:44:13", "statements": [ { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 3985, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1422:1:13", "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": 3984, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "1414:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 3986, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1414:10:13", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "id": 3987, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "1413:12:13", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 3979, "id": 3988, "nodeType": "Return", "src": "1406:19:13" } ] } }, { "assignments": [ 3992 ], "declarations": [ { "constant": false, "id": 3992, "name": "r", "nodeType": "VariableDeclaration", "scope": 4032, "src": "1502:9:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 3991, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1502:7:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 3993, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "1502:9:13" }, { "assignments": [ 3995 ], "declarations": [ { "constant": false, "id": 3995, "name": "s", "nodeType": "VariableDeclaration", "scope": 4032, "src": "1521:9:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 3994, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1521:7:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 3996, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "1521:9:13" }, { "assignments": [ 3998 ], "declarations": [ { "constant": false, "id": 3998, "name": "v", "nodeType": "VariableDeclaration", "scope": 4032, "src": "1540:7:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 3997, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "1540:5:13", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": null, "visibility": "internal" } ], "id": 3999, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "1540:7:13" }, { "externalReferences": [ { "r": { "declaration": 3992, "isOffset": false, "isSlot": false, "src": "1760:1:13", "valueSize": 1 } }, { "signature": { "declaration": 3975, "isOffset": false, "isSlot": false, "src": "1775:9:13", "valueSize": 1 } }, { "v": { "declaration": 3998, "isOffset": false, "isSlot": false, "src": "1850:1:13", "valueSize": 1 } }, { "s": { "declaration": 3995, "isOffset": false, "isSlot": false, "src": "1805:1:13", "valueSize": 1 } }, { "signature": { "declaration": 3975, "isOffset": false, "isSlot": false, "src": "1820:9:13", "valueSize": 1 } }, { "signature": { "declaration": 3975, "isOffset": false, "isSlot": false, "src": "1873:9:13", "valueSize": 1 } } ], "id": 4000, "nodeType": "InlineAssembly", "operations": "{\n r := mload(add(signature, 0x20))\n s := mload(add(signature, 0x40))\n v := byte(0, mload(add(signature, 0x60)))\n}", "src": "1737:164:13" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 4005, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 4002, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3995, "src": "2797:1:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 4001, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2789:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_uint256_$", "typeString": "type(uint256)" }, "typeName": "uint256" }, "id": 4003, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2789:10:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">", "rightExpression": { "argumentTypes": null, "hexValue": "307837464646464646464646464646464646464646464646464646464646464646463544353736453733353741343530314444464539324634363638314232304130", "id": 4004, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2802:66:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_57896044618658097711785492504343953926418782139537452191302581570759080747168_by_1", "typeString": "int_const 5789...(69 digits omitted)...7168" }, "value": "0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0" }, "src": "2789:79:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 4011, "nodeType": "IfStatement", "src": "2785:127:13", "trueBody": { "id": 4010, "nodeType": "Block", "src": "2870:42:13", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 4007, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2899:1:13", "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": 4006, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2891:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 4008, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2891:10:13", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 3979, "id": 4009, "nodeType": "Return", "src": "2884:17:13" } ] } }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 4018, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 4014, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 4012, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3998, "src": "2926:1:13", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3237", "id": 4013, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2931:2:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "2926:7:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 4017, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 4015, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3998, "src": "2937:1:13", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3238", "id": 4016, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2942:2:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_28_by_1", "typeString": "int_const 28" }, "value": "28" }, "src": "2937:7:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "2926:18:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 4024, "nodeType": "IfStatement", "src": "2922:66:13", "trueBody": { "id": 4023, "nodeType": "Block", "src": "2946:42:13", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 4020, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2975:1:13", "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": 4019, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2967:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 4021, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2967:10:13", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 3979, "id": 4022, "nodeType": "Return", "src": "2960:17:13" } ] } }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 4026, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3973, "src": "3099:4:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 4027, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3998, "src": "3105:1:13", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "argumentTypes": null, "id": 4028, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3992, "src": "3108:1:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 4029, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3995, "src": "3111:1:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_uint8", "typeString": "uint8" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 4025, "name": "ecrecover", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4688, "src": "3089:9:13", "typeDescriptions": { "typeIdentifier": "t_function_ecrecover_pure$_t_bytes32_$_t_uint8_$_t_bytes32_$_t_bytes32_$returns$_t_address_$", "typeString": "function (bytes32,uint8,bytes32,bytes32) pure returns (address)" } }, "id": 4030, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3089:24:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 3979, "id": 4031, "nodeType": "Return", "src": "3082:31:13" } ] }, "documentation": "@dev Returns the address that signed a hashed message (`hash`) with\n`signature`. This address can then be used for verification purposes.\n * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\nthis function rejects them by requiring the `s` value to be in the lower\nhalf order, and the `v` value to be either 27 or 28.\n * (.note) This call _does not revert_ if the signature is invalid, or\nif the signer is otherwise unable to be retrieved. In those scenarios,\nthe zero address is returned.\n * (.warning) `hash` _must_ be the result of a hash operation for the\nverification to be secure: it is possible to craft signatures that\nrecover to arbitrary addresses for non-hashed data. A safe way to ensure\nthis is by receiving a hash of the original message (which may otherwise)\nbe too long), and then calling `toEthSignedMessageHash` on it.", "id": 4033, "implemented": true, "kind": "function", "modifiers": [], "name": "recover", "nodeType": "FunctionDefinition", "parameters": { "id": 3976, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 3973, "name": "hash", "nodeType": "VariableDeclaration", "scope": 4033, "src": "1246:12:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 3972, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1246:7:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 3975, "name": "signature", "nodeType": "VariableDeclaration", "scope": 4033, "src": "1260:22:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 3974, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "1260:5:13", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "1245:38:13" }, "returnParameters": { "id": 3979, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 3978, "name": "", "nodeType": "VariableDeclaration", "scope": 4033, "src": "1307:7:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 3977, "name": "address", "nodeType": "ElementaryTypeName", "src": "1307:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "1306:9:13" }, "scope": 4050, "src": "1229:1891:13", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 4048, "nodeType": "Block", "src": "3464:187:13", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "19457468657265756d205369676e6564204d6573736167653a0a3332", "id": 4043, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "3602:34:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_178a2411ab6fbc1ba11064408972259c558d0e82fd48b0aba3ad81d14f065e73", "typeString": "literal_string \"\u0019Ethereum Signed Message:\n32\"" }, "value": "\u0019Ethereum Signed Message:\n32" }, { "argumentTypes": null, "id": 4044, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4035, "src": "3638:4:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_stringliteral_178a2411ab6fbc1ba11064408972259c558d0e82fd48b0aba3ad81d14f065e73", "typeString": "literal_string \"\u0019Ethereum Signed Message:\n32\"" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "expression": { "argumentTypes": null, "id": 4041, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4683, "src": "3585:3:13", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 4042, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodePacked", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "3585:16:13", "typeDescriptions": { "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 4045, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3585:58:13", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 4040, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4690, "src": "3575:9:13", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 4046, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3575:69:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "functionReturnParameters": 4039, "id": 4047, "nodeType": "Return", "src": "3568:76:13" } ] }, "documentation": "@dev Returns an Ethereum Signed Message, created from a `hash`. This\nreplicates the behavior of the\n[`eth_sign`](https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign)\nJSON-RPC method.\n * See `recover`.", "id": 4049, "implemented": true, "kind": "function", "modifiers": [], "name": "toEthSignedMessageHash", "nodeType": "FunctionDefinition", "parameters": { "id": 4036, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4035, "name": "hash", "nodeType": "VariableDeclaration", "scope": 4049, "src": "3418:12:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 4034, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "3418:7:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "3417:14:13" }, "returnParameters": { "id": 4039, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4038, "name": "", "nodeType": "VariableDeclaration", "scope": 4049, "src": "3455:7:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 4037, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "3455:7:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "3454:9:13" }, "scope": 4050, "src": "3386:265:13", "stateMutability": "pure", "superFunction": null, "visibility": "internal" } ], "scope": 4051, "src": "231:3422:13" } ], "src": "0:3654:13" }, "legacyAST": { "absolutePath": "openzeppelin-solidity/contracts/cryptography/ECDSA.sol", "exportedSymbols": { "ECDSA": [ 4050 ] }, "id": 4051, "nodeType": "SourceUnit", "nodes": [ { "id": 3971, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:13" }, { "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": "@dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.\n * These functions can be used to verify that a message was signed by the holder\nof the private keys of a given address.", "fullyImplemented": true, "id": 4050, "linearizedBaseContracts": [ 4050 ], "name": "ECDSA", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 4032, "nodeType": "Block", "src": "1316:1804:13", "statements": [ { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 3983, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 3980, "name": "signature", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3975, "src": "1368:9:13", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 3981, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "1368:16:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3635", "id": 3982, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1388:2:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_65_by_1", "typeString": "int_const 65" }, "value": "65" }, "src": "1368:22:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 3990, "nodeType": "IfStatement", "src": "1364:72:13", "trueBody": { "id": 3989, "nodeType": "Block", "src": "1392:44:13", "statements": [ { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 3985, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1422:1:13", "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": 3984, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "1414:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 3986, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1414:10:13", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "id": 3987, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "1413:12:13", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 3979, "id": 3988, "nodeType": "Return", "src": "1406:19:13" } ] } }, { "assignments": [ 3992 ], "declarations": [ { "constant": false, "id": 3992, "name": "r", "nodeType": "VariableDeclaration", "scope": 4032, "src": "1502:9:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 3991, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1502:7:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 3993, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "1502:9:13" }, { "assignments": [ 3995 ], "declarations": [ { "constant": false, "id": 3995, "name": "s", "nodeType": "VariableDeclaration", "scope": 4032, "src": "1521:9:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 3994, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1521:7:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 3996, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "1521:9:13" }, { "assignments": [ 3998 ], "declarations": [ { "constant": false, "id": 3998, "name": "v", "nodeType": "VariableDeclaration", "scope": 4032, "src": "1540:7:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 3997, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "1540:5:13", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": null, "visibility": "internal" } ], "id": 3999, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "1540:7:13" }, { "externalReferences": [ { "r": { "declaration": 3992, "isOffset": false, "isSlot": false, "src": "1760:1:13", "valueSize": 1 } }, { "signature": { "declaration": 3975, "isOffset": false, "isSlot": false, "src": "1775:9:13", "valueSize": 1 } }, { "v": { "declaration": 3998, "isOffset": false, "isSlot": false, "src": "1850:1:13", "valueSize": 1 } }, { "s": { "declaration": 3995, "isOffset": false, "isSlot": false, "src": "1805:1:13", "valueSize": 1 } }, { "signature": { "declaration": 3975, "isOffset": false, "isSlot": false, "src": "1820:9:13", "valueSize": 1 } }, { "signature": { "declaration": 3975, "isOffset": false, "isSlot": false, "src": "1873:9:13", "valueSize": 1 } } ], "id": 4000, "nodeType": "InlineAssembly", "operations": "{\n r := mload(add(signature, 0x20))\n s := mload(add(signature, 0x40))\n v := byte(0, mload(add(signature, 0x60)))\n}", "src": "1737:164:13" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 4005, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 4002, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3995, "src": "2797:1:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 4001, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2789:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_uint256_$", "typeString": "type(uint256)" }, "typeName": "uint256" }, "id": 4003, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2789:10:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">", "rightExpression": { "argumentTypes": null, "hexValue": "307837464646464646464646464646464646464646464646464646464646464646463544353736453733353741343530314444464539324634363638314232304130", "id": 4004, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2802:66:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_57896044618658097711785492504343953926418782139537452191302581570759080747168_by_1", "typeString": "int_const 5789...(69 digits omitted)...7168" }, "value": "0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0" }, "src": "2789:79:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 4011, "nodeType": "IfStatement", "src": "2785:127:13", "trueBody": { "id": 4010, "nodeType": "Block", "src": "2870:42:13", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 4007, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2899:1:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 4006, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2891:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 4008, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2891:10:13", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 3979, "id": 4009, "nodeType": "Return", "src": "2884:17:13" } ] } }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 4018, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 4014, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 4012, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3998, "src": "2926:1:13", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3237", "id": 4013, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2931:2:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "2926:7:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 4017, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 4015, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3998, "src": "2937:1:13", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3238", "id": 4016, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2942:2:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_28_by_1", "typeString": "int_const 28" }, "value": "28" }, "src": "2937:7:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "2926:18:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 4024, "nodeType": "IfStatement", "src": "2922:66:13", "trueBody": { "id": 4023, "nodeType": "Block", "src": "2946:42:13", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 4020, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2975:1:13", "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": 4019, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2967:7:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 4021, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2967:10:13", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 3979, "id": 4022, "nodeType": "Return", "src": "2960:17:13" } ] } }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 4026, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3973, "src": "3099:4:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 4027, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3998, "src": "3105:1:13", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "argumentTypes": null, "id": 4028, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3992, "src": "3108:1:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 4029, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3995, "src": "3111:1:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_uint8", "typeString": "uint8" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 4025, "name": "ecrecover", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4688, "src": "3089:9:13", "typeDescriptions": { "typeIdentifier": "t_function_ecrecover_pure$_t_bytes32_$_t_uint8_$_t_bytes32_$_t_bytes32_$returns$_t_address_$", "typeString": "function (bytes32,uint8,bytes32,bytes32) pure returns (address)" } }, "id": 4030, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3089:24:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 3979, "id": 4031, "nodeType": "Return", "src": "3082:31:13" } ] }, "documentation": "@dev Returns the address that signed a hashed message (`hash`) with\n`signature`. This address can then be used for verification purposes.\n * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\nthis function rejects them by requiring the `s` value to be in the lower\nhalf order, and the `v` value to be either 27 or 28.\n * (.note) This call _does not revert_ if the signature is invalid, or\nif the signer is otherwise unable to be retrieved. In those scenarios,\nthe zero address is returned.\n * (.warning) `hash` _must_ be the result of a hash operation for the\nverification to be secure: it is possible to craft signatures that\nrecover to arbitrary addresses for non-hashed data. A safe way to ensure\nthis is by receiving a hash of the original message (which may otherwise)\nbe too long), and then calling `toEthSignedMessageHash` on it.", "id": 4033, "implemented": true, "kind": "function", "modifiers": [], "name": "recover", "nodeType": "FunctionDefinition", "parameters": { "id": 3976, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 3973, "name": "hash", "nodeType": "VariableDeclaration", "scope": 4033, "src": "1246:12:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 3972, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1246:7:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 3975, "name": "signature", "nodeType": "VariableDeclaration", "scope": 4033, "src": "1260:22:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 3974, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "1260:5:13", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "1245:38:13" }, "returnParameters": { "id": 3979, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 3978, "name": "", "nodeType": "VariableDeclaration", "scope": 4033, "src": "1307:7:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 3977, "name": "address", "nodeType": "ElementaryTypeName", "src": "1307:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "1306:9:13" }, "scope": 4050, "src": "1229:1891:13", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 4048, "nodeType": "Block", "src": "3464:187:13", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "19457468657265756d205369676e6564204d6573736167653a0a3332", "id": 4043, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "3602:34:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_178a2411ab6fbc1ba11064408972259c558d0e82fd48b0aba3ad81d14f065e73", "typeString": "literal_string \"\u0019Ethereum Signed Message:\n32\"" }, "value": "\u0019Ethereum Signed Message:\n32" }, { "argumentTypes": null, "id": 4044, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4035, "src": "3638:4:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_stringliteral_178a2411ab6fbc1ba11064408972259c558d0e82fd48b0aba3ad81d14f065e73", "typeString": "literal_string \"\u0019Ethereum Signed Message:\n32\"" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "expression": { "argumentTypes": null, "id": 4041, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4683, "src": "3585:3:13", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 4042, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodePacked", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "3585:16:13", "typeDescriptions": { "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 4045, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3585:58:13", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 4040, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4690, "src": "3575:9:13", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 4046, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3575:69:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "functionReturnParameters": 4039, "id": 4047, "nodeType": "Return", "src": "3568:76:13" } ] }, "documentation": "@dev Returns an Ethereum Signed Message, created from a `hash`. This\nreplicates the behavior of the\n[`eth_sign`](https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign)\nJSON-RPC method.\n * See `recover`.", "id": 4049, "implemented": true, "kind": "function", "modifiers": [], "name": "toEthSignedMessageHash", "nodeType": "FunctionDefinition", "parameters": { "id": 4036, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4035, "name": "hash", "nodeType": "VariableDeclaration", "scope": 4049, "src": "3418:12:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 4034, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "3418:7:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "3417:14:13" }, "returnParameters": { "id": 4039, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4038, "name": "", "nodeType": "VariableDeclaration", "scope": 4049, "src": "3455:7:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 4037, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "3455:7:13", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "3454:9:13" }, "scope": 4050, "src": "3386:265:13", "stateMutability": "pure", "superFunction": null, "visibility": "internal" } ], "scope": 4051, "src": "231:3422:13" } ], "src": "0:3654:13" }, "compiler": { "name": "solc", "version": "0.5.8+commit.23d335f2.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.0.11", "updatedAt": "2019-07-09T03:45:29.446Z", "devdoc": { "details": "Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * These functions can be used to verify that a message was signed by the holder of the private keys of a given address.", "methods": {} }, "userdoc": { "methods": {} } }