{ "contractName": "ECDSA", "abi": [], "bytecode": "0x604c602c600b82828239805160001a60731460008114601c57601e565bfe5b5030600052607381538281f30073000000000000000000000000000000000000000030146080604052600080fd00a165627a7a7230582053b419f5a72ca0819a9d5b4fed40f5e2f5dacd11a44323b29b017ccf41e0edad0029", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fd00a165627a7a7230582053b419f5a72ca0819a9d5b4fed40f5e2f5dacd11a44323b29b017ccf41e0edad0029", "sourceMap": "301:1678:25:-;;132:2:-1;166:7;155:9;146:7;137:37;252:7;246:14;243:1;238:23;232:4;229:33;270:1;265:20;;;;222:63;;265:20;274:9;222:63;;298:9;295:1;288:20;328:4;319:7;311:22;352:7;343;336:24", "deployedSourceMap": "301:1678:25:-;;;;;;;;", "source": "pragma solidity ^0.4.24;\n\n\n/**\n * @title Elliptic curve signature operations\n * @dev Based on https://gist.github.com/axic/5b33912c6f61ae6fd96d6c4a47afde6d\n * TODO Remove this library once solidity supports passing a signature to ecrecover.\n * See https://github.com/ethereum/solidity/issues/864\n */\n\nlibrary ECDSA {\n\n /**\n * @dev Recover signer address from a message by using their signature\n * @param hash bytes32 message, the hash is the signed message. What is recovered is the signer address.\n * @param signature bytes signature, the signature is generated using web3.eth.sign()\n */\n function recover(bytes32 hash, bytes signature)\n internal\n pure\n returns (address)\n {\n bytes32 r;\n bytes32 s;\n uint8 v;\n\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 // ecrecover takes the signature parameters, and the only way to get them\n // currently is to use assembly.\n // solium-disable-next-line security/no-inline-assembly\n assembly {\n r := mload(add(signature, 32))\n s := mload(add(signature, 64))\n v := byte(0, mload(add(signature, 96)))\n }\n\n // Version of signature should be 27 or 28, but 0 and 1 are also possible versions\n if (v < 27) {\n v += 27;\n }\n\n // If the version is correct return the signer address\n if (v != 27 && v != 28) {\n return (address(0));\n } else {\n // solium-disable-next-line arg-overflow\n return ecrecover(hash, v, r, s);\n }\n }\n\n /**\n * toEthSignedMessageHash\n * @dev prefix a bytes32 value with \"\\x19Ethereum Signed Message:\"\n * and hash the result\n */\n function toEthSignedMessageHash(bytes32 hash)\n internal\n pure\n returns (bytes32)\n {\n // 32 is the length in bytes of hash,\n // enforced by the type signature above\n return keccak256(\n abi.encodePacked(\"\\x19Ethereum Signed Message:\\n32\", hash)\n );\n }\n}\n", "sourcePath": "openzeppelin-eth/contracts/cryptography/ECDSA.sol", "ast": { "absolutePath": "openzeppelin-eth/contracts/cryptography/ECDSA.sol", "exportedSymbols": { "ECDSA": [ 2875 ] }, "id": 2876, "nodeType": "SourceUnit", "nodes": [ { "id": 2796, "literals": [ "solidity", "^", "0.4", ".24" ], "nodeType": "PragmaDirective", "src": "0:24:25" }, { "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": "@title Elliptic curve signature operations\n@dev Based on https://gist.github.com/axic/5b33912c6f61ae6fd96d6c4a47afde6d\nTODO Remove this library once solidity supports passing a signature to ecrecover.\nSee https://github.com/ethereum/solidity/issues/864", "fullyImplemented": true, "id": 2875, "linearizedBaseContracts": [ 2875 ], "name": "ECDSA", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 2857, "nodeType": "Block", "src": "694:868:25", "statements": [ { "assignments": [], "declarations": [ { "constant": false, "id": 2806, "name": "r", "nodeType": "VariableDeclaration", "scope": 2858, "src": "700:9:25", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 2805, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "700:7:25", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 2807, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "700:9:25" }, { "assignments": [], "declarations": [ { "constant": false, "id": 2809, "name": "s", "nodeType": "VariableDeclaration", "scope": 2858, "src": "715:9:25", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 2808, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "715:7:25", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 2810, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "715:9:25" }, { "assignments": [], "declarations": [ { "constant": false, "id": 2812, "name": "v", "nodeType": "VariableDeclaration", "scope": 2858, "src": "730:7:25", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 2811, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "730:5:25", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": null, "visibility": "internal" } ], "id": 2813, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "730:7:25" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2817, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 2814, "name": "signature", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2800, "src": "782:9:25", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 2815, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "782:16:25", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3635", "id": 2816, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "802:2:25", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_65_by_1", "typeString": "int_const 65" }, "value": "65" }, "src": "782:22:25", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 2824, "nodeType": "IfStatement", "src": "778:62:25", "trueBody": { "id": 2823, "nodeType": "Block", "src": "806:34:25", "statements": [ { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 2819, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "830:1:25", "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": 2818, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "822:7:25", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 2820, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "822:10:25", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "id": 2821, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "821:12:25", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 2804, "id": 2822, "nodeType": "Return", "src": "814:19:25" } ] } }, { "externalReferences": [ { "r": { "declaration": 2806, "isOffset": false, "isSlot": false, "src": "1090:1:25", "valueSize": 1 } }, { "v": { "declaration": 2812, "isOffset": false, "isSlot": false, "src": "1164:1:25", "valueSize": 1 } }, { "signature": { "declaration": 2800, "isOffset": false, "isSlot": false, "src": "1105:9:25", "valueSize": 1 } }, { "s": { "declaration": 2809, "isOffset": false, "isSlot": false, "src": "1127:1:25", "valueSize": 1 } }, { "signature": { "declaration": 2800, "isOffset": false, "isSlot": false, "src": "1142:9:25", "valueSize": 1 } }, { "signature": { "declaration": 2800, "isOffset": false, "isSlot": false, "src": "1187:9:25", "valueSize": 1 } } ], "id": 2825, "nodeType": "InlineAssembly", "operations": "{\n r := mload(add(signature, 32))\n s := mload(add(signature, 64))\n v := byte(0, mload(add(signature, 96)))\n}", "src": "1073:231:25" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 2828, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 2826, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2812, "src": "1306:1:25", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "<", "rightExpression": { "argumentTypes": null, "hexValue": "3237", "id": 2827, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1310:2:25", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "1306:6:25", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 2834, "nodeType": "IfStatement", "src": "1302:34:25", "trueBody": { "id": 2833, "nodeType": "Block", "src": "1314:22:25", "statements": [ { "expression": { "argumentTypes": null, "id": 2831, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 2829, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2812, "src": "1322:1:25", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "argumentTypes": null, "hexValue": "3237", "id": 2830, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1327:2:25", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "1322:7:25", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "id": 2832, "nodeType": "ExpressionStatement", "src": "1322:7:25" } ] } }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 2841, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 2837, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 2835, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2812, "src": "1405:1:25", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3237", "id": 2836, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1410:2:25", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "1405:7:25", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 2840, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 2838, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2812, "src": "1416:1:25", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3238", "id": 2839, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1421:2:25", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_28_by_1", "typeString": "int_const 28" }, "value": "28" }, "src": "1416:7:25", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "1405:18:25", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": { "id": 2855, "nodeType": "Block", "src": "1465:93:25", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2849, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2798, "src": "1537:4:25", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 2850, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2812, "src": "1543:1:25", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "argumentTypes": null, "id": 2851, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2806, "src": "1546:1:25", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 2852, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2809, "src": "1549:1:25", "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": 2848, "name": "ecrecover", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3248, "src": "1527:9:25", "typeDescriptions": { "typeIdentifier": "t_function_ecrecover_pure$_t_bytes32_$_t_uint8_$_t_bytes32_$_t_bytes32_$returns$_t_address_$", "typeString": "function (bytes32,uint8,bytes32,bytes32) pure returns (address)" } }, "id": 2853, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1527:24:25", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 2804, "id": 2854, "nodeType": "Return", "src": "1520:31:25" } ] }, "id": 2856, "nodeType": "IfStatement", "src": "1401:157:25", "trueBody": { "id": 2847, "nodeType": "Block", "src": "1425:34:25", "statements": [ { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 2843, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1449:1:25", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 2842, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "1441:7:25", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 2844, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1441:10:25", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "id": 2845, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "1440:12:25", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 2804, "id": 2846, "nodeType": "Return", "src": "1433:19:25" } ] } } ] }, "documentation": "@dev Recover signer address from a message by using their signature\n@param hash bytes32 message, the hash is the signed message. What is recovered is the signer address.\n@param signature bytes signature, the signature is generated using web3.eth.sign()", "id": 2858, "implemented": true, "isConstructor": false, "isDeclaredConst": true, "modifiers": [], "name": "recover", "nodeType": "FunctionDefinition", "parameters": { "id": 2801, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2798, "name": "hash", "nodeType": "VariableDeclaration", "scope": 2858, "src": "617:12:25", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 2797, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "617:7:25", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2800, "name": "signature", "nodeType": "VariableDeclaration", "scope": 2858, "src": "631:15:25", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 2799, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "631:5:25", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "616:31:25" }, "payable": false, "returnParameters": { "id": 2804, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2803, "name": "", "nodeType": "VariableDeclaration", "scope": 2858, "src": "683:7:25", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2802, "name": "address", "nodeType": "ElementaryTypeName", "src": "683:7:25", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "682:9:25" }, "scope": 2875, "src": "600:962:25", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 2873, "nodeType": "Block", "src": "1792:185:25", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "19457468657265756d205369676e6564204d6573736167653a0a3332", "id": 2868, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1925:34:25", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_178a2411ab6fbc1ba11064408972259c558d0e82fd48b0aba3ad81d14f065e73", "typeString": "literal_string \"\u0019Ethereum Signed Message:\n32\"" }, "value": "\u0019Ethereum Signed Message:\n32" }, { "argumentTypes": null, "id": 2869, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2860, "src": "1961:4:25", "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": 2866, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3243, "src": "1908:3:25", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 2867, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodePacked", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "1908:16:25", "typeDescriptions": { "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 2870, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1908:58:25", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 2865, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3250, "src": "1891:9:25", "typeDescriptions": { "typeIdentifier": "t_function_sha3_pure$__$returns$_t_bytes32_$", "typeString": "function () pure returns (bytes32)" } }, "id": 2871, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1891:81:25", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "functionReturnParameters": 2864, "id": 2872, "nodeType": "Return", "src": "1884:88:25" } ] }, "documentation": "toEthSignedMessageHash\n@dev prefix a bytes32 value with \"\\x19Ethereum Signed Message:\"\nand hash the result", "id": 2874, "implemented": true, "isConstructor": false, "isDeclaredConst": true, "modifiers": [], "name": "toEthSignedMessageHash", "nodeType": "FunctionDefinition", "parameters": { "id": 2861, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2860, "name": "hash", "nodeType": "VariableDeclaration", "scope": 2874, "src": "1732:12:25", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 2859, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1732:7:25", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "1731:14:25" }, "payable": false, "returnParameters": { "id": 2864, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2863, "name": "", "nodeType": "VariableDeclaration", 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