{ "contractName": "ECDSA", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.5.4+commit.9549d8ff\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"details\":\"Based on https://gist.github.com/axic/5b33912c6f61ae6fd96d6c4a47afde6d TODO Remove this library once solidity supports passing a signature to ecrecover. See https://github.com/ethereum/solidity/issues/864\",\"methods\":{},\"title\":\"Elliptic curve signature operations\"},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"openzeppelin-solidity/contracts/cryptography/ECDSA.sol\":\"ECDSA\"},\"evmVersion\":\"byzantium\",\"libraries\":{},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"openzeppelin-solidity/contracts/cryptography/ECDSA.sol\":{\"keccak256\":\"0xb48974d92a87053dc1d6c5389f3d1b2ad522dec23afcb508eaa935d98dfdc0b6\",\"urls\":[\"bzzr://e665a84309432c27a26e622665dd97ff29d4d6ad7ad655d6e2c50226a5e99b56\"]}},\"version\":1}", "bytecode": "0x604c602c600b82828239805160001a60731460008114601c57601e565bfe5b5030600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea165627a7a7230582003713ecd248669e536ceb1e1c8ea5ca07048e58eed4222c0916daf419ce1ed5f0029", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea165627a7a7230582003713ecd248669e536ceb1e1c8ea5ca07048e58eed4222c0916daf419ce1ed5f0029", "sourceMap": "299:1753:64:-;;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": "299:1753:64:-;;;;;;;;", "source": "pragma solidity ^0.5.0;\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 * @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 memory signature) internal pure returns (address) {\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 // 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 // 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 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) 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": [ 15639 ] }, "id": 15640, "nodeType": "SourceUnit", "nodes": [ { "id": 15560, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:64" }, { "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": 15639, "linearizedBaseContracts": [ 15639 ], "name": "ECDSA", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 15621, "nodeType": "Block", "src": "696:939:64", "statements": [ { "assignments": [ 15570 ], "declarations": [ { "constant": false, "id": 15570, "name": "r", "nodeType": "VariableDeclaration", "scope": 15621, "src": "706:9:64", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 15569, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "706:7:64", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 15571, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "706:9:64" }, { "assignments": [ 15573 ], "declarations": [ { "constant": false, "id": 15573, "name": "s", "nodeType": "VariableDeclaration", "scope": 15621, "src": "725:9:64", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 15572, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "725:7:64", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 15574, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "725:9:64" }, { "assignments": [ 15576 ], "declarations": [ { "constant": false, "id": 15576, "name": "v", "nodeType": "VariableDeclaration", "scope": 15621, "src": "744:7:64", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 15575, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "744:5:64", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": null, "visibility": "internal" } ], "id": 15577, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "744:7:64" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 15581, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 15578, "name": "signature", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15564, "src": "804:9:64", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 15579, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "804:16:64", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3635", "id": 15580, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "824:2:64", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_65_by_1", "typeString": "int_const 65" }, "value": "65" }, "src": "804:22:64", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 15588, "nodeType": "IfStatement", "src": "800:72:64", "trueBody": { "id": 15587, "nodeType": "Block", "src": "828:44:64", "statements": [ { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 15583, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "858:1:64", "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": 15582, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "850:7:64", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 15584, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "850:10:64", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "id": 15585, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "849:12:64", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 15568, "id": 15586, "nodeType": "Return", "src": "842:19:64" } ] } }, { "externalReferences": [ { "r": { "declaration": 15570, "isOffset": false, "isSlot": false, "src": "1140:1:64", "valueSize": 1 } }, { "signature": { "declaration": 15564, "isOffset": false, "isSlot": false, "src": "1155:9:64", "valueSize": 1 } }, { "v": { "declaration": 15576, "isOffset": false, "isSlot": false, "src": "1230:1:64", "valueSize": 1 } }, { "s": { "declaration": 15573, "isOffset": false, "isSlot": false, "src": "1185:1:64", "valueSize": 1 } }, { "signature": { "declaration": 15564, "isOffset": false, "isSlot": false, "src": "1200:9:64", "valueSize": 1 } }, { "signature": { "declaration": 15564, "isOffset": false, "isSlot": false, "src": "1253:9:64", "valueSize": 1 } } ], "id": 15589, "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": "1117:267:64" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 15592, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 15590, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15576, "src": "1386:1:64", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "<", "rightExpression": { "argumentTypes": null, "hexValue": "3237", "id": 15591, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1390:2:64", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "1386:6:64", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 15598, "nodeType": "IfStatement", "src": "1382:44:64", "trueBody": { "id": 15597, "nodeType": "Block", "src": "1394:32:64", "statements": [ { "expression": { "argumentTypes": null, "id": 15595, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 15593, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15576, "src": "1408:1:64", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "argumentTypes": null, "hexValue": "3237", "id": 15594, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1413:2:64", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "1408:7:64", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "id": 15596, "nodeType": "ExpressionStatement", "src": "1408:7:64" } ] } }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 15605, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 15601, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 15599, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15576, "src": "1503:1:64", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3237", "id": 15600, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1508:2:64", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "1503:7:64", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 15604, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 15602, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15576, "src": "1514:1:64", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3238", "id": 15603, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1519:2:64", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_28_by_1", "typeString": "int_const 28" }, "value": "28" }, "src": "1514:7:64", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "1503:18:64", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": { "id": 15619, "nodeType": "Block", "src": "1573:56:64", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 15613, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15562, "src": "1604:4:64", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 15614, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15576, "src": "1610:1:64", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "argumentTypes": null, "id": 15615, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15570, "src": "1613:1:64", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 15616, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15573, "src": "1616:1:64", "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": 15612, "name": "ecrecover", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16774, "src": "1594:9:64", "typeDescriptions": { "typeIdentifier": "t_function_ecrecover_pure$_t_bytes32_$_t_uint8_$_t_bytes32_$_t_bytes32_$returns$_t_address_$", "typeString": "function (bytes32,uint8,bytes32,bytes32) pure returns (address)" } }, "id": 15617, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1594:24:64", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 15568, "id": 15618, "nodeType": "Return", "src": "1587:31:64" } ] }, "id": 15620, "nodeType": "IfStatement", "src": "1499:130:64", "trueBody": { "id": 15611, "nodeType": "Block", "src": "1523:44:64", "statements": [ { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 15607, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1553:1:64", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 15606, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "1545:7:64", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 15608, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1545:10:64", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "id": 15609, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "1544:12:64", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 15568, "id": 15610, "nodeType": "Return", "src": "1537:19:64" } ] } } ] }, "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": 15622, "implemented": true, "kind": "function", "modifiers": [], "name": "recover", "nodeType": "FunctionDefinition", "parameters": { "id": 15565, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 15562, "name": "hash", "nodeType": "VariableDeclaration", "scope": 15622, "src": "626:12:64", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 15561, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "626:7:64", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 15564, "name": "signature", "nodeType": "VariableDeclaration", "scope": 15622, "src": "640:22:64", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 15563, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "640:5:64", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "625:38:64" }, "returnParameters": { "id": 15568, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 15567, "name": "", "nodeType": "VariableDeclaration", "scope": 15622, "src": "687:7:64", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 15566, "name": "address", "nodeType": "ElementaryTypeName", "src": "687:7:64", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "686:9:64" }, "scope": 15639, "src": "609:1026:64", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 15637, "nodeType": "Block", "src": "1863:187:64", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "19457468657265756d205369676e6564204d6573736167653a0a3332", "id": 15632, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2001:34:64", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_178a2411ab6fbc1ba11064408972259c558d0e82fd48b0aba3ad81d14f065e73", "typeString": "literal_string \"\u0019Ethereum Signed Message:\n32\"" }, "value": "\u0019Ethereum Signed Message:\n32" }, { "argumentTypes": null, "id": 15633, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15624, "src": "2037:4:64", "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": 15630, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16769, "src": "1984:3:64", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 15631, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodePacked", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "1984:16:64", "typeDescriptions": { "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 15634, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1984:58:64", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 15629, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16776, "src": "1974:9:64", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 15635, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1974:69:64", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "functionReturnParameters": 15628, "id": 15636, "nodeType": "Return", "src": "1967:76:64" } ] }, "documentation": "toEthSignedMessageHash\n@dev prefix a bytes32 value with \"\\x19Ethereum Signed Message:\"\nand hash the result", "id": 15638, "implemented": true, "kind": "function", "modifiers": [], "name": "toEthSignedMessageHash", "nodeType": "FunctionDefinition", "parameters": { "id": 15625, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 15624, "name": "hash", "nodeType": "VariableDeclaration", "scope": 15638, "src": "1817:12:64", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 15623, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1817:7:64", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "1816:14:64" }, "returnParameters": { "id": 15628, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 15627, "name": "", "nodeType": "VariableDeclaration", "scope": 15638, "src": "1854:7:64", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 15626, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1854:7:64", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "1853:9:64" }, "scope": 15639, "src": "1785:265:64", "stateMutability": "pure", "superFunction": null, "visibility": "internal" } ], "scope": 15640, "src": "299:1753:64" } ], "src": "0:2053:64" }, "legacyAST": { "absolutePath": "openzeppelin-solidity/contracts/cryptography/ECDSA.sol", "exportedSymbols": { "ECDSA": [ 15639 ] }, "id": 15640, "nodeType": "SourceUnit", "nodes": [ { "id": 15560, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:64" }, { "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": 15639, "linearizedBaseContracts": [ 15639 ], "name": "ECDSA", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 15621, "nodeType": "Block", "src": "696:939:64", "statements": [ { "assignments": [ 15570 ], "declarations": [ { "constant": false, "id": 15570, "name": "r", "nodeType": "VariableDeclaration", "scope": 15621, "src": "706:9:64", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 15569, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "706:7:64", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 15571, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "706:9:64" }, { "assignments": [ 15573 ], "declarations": [ { "constant": false, "id": 15573, "name": "s", "nodeType": "VariableDeclaration", "scope": 15621, "src": "725:9:64", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 15572, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "725:7:64", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 15574, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "725:9:64" }, { "assignments": [ 15576 ], "declarations": [ { "constant": false, "id": 15576, "name": "v", "nodeType": "VariableDeclaration", "scope": 15621, "src": "744:7:64", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 15575, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "744:5:64", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": null, "visibility": "internal" } ], "id": 15577, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "744:7:64" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 15581, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 15578, "name": "signature", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15564, "src": "804:9:64", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 15579, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "804:16:64", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3635", "id": 15580, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "824:2:64", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_65_by_1", "typeString": "int_const 65" }, "value": "65" }, "src": "804:22:64", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 15588, "nodeType": "IfStatement", "src": "800:72:64", "trueBody": { "id": 15587, "nodeType": "Block", "src": "828:44:64", "statements": [ { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 15583, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "858:1:64", "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": 15582, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "850:7:64", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 15584, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "850:10:64", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "id": 15585, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "849:12:64", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 15568, "id": 15586, "nodeType": "Return", "src": "842:19:64" } ] } }, { "externalReferences": [ { "r": { "declaration": 15570, "isOffset": false, "isSlot": false, "src": "1140:1:64", "valueSize": 1 } }, { "signature": { "declaration": 15564, "isOffset": false, "isSlot": false, "src": "1155:9:64", "valueSize": 1 } }, { "v": { "declaration": 15576, "isOffset": false, "isSlot": false, "src": "1230:1:64", "valueSize": 1 } }, { "s": { "declaration": 15573, "isOffset": false, "isSlot": false, "src": "1185:1:64", "valueSize": 1 } }, { "signature": { "declaration": 15564, "isOffset": false, "isSlot": false, "src": "1200:9:64", "valueSize": 1 } }, { "signature": { "declaration": 15564, "isOffset": false, "isSlot": false, "src": "1253:9:64", "valueSize": 1 } } ], "id": 15589, "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": "1117:267:64" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 15592, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 15590, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15576, "src": "1386:1:64", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "<", "rightExpression": { "argumentTypes": null, "hexValue": "3237", "id": 15591, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1390:2:64", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "1386:6:64", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 15598, "nodeType": "IfStatement", "src": "1382:44:64", "trueBody": { "id": 15597, "nodeType": "Block", "src": "1394:32:64", "statements": [ { "expression": { "argumentTypes": null, "id": 15595, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 15593, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15576, "src": "1408:1:64", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "argumentTypes": null, "hexValue": "3237", "id": 15594, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1413:2:64", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "1408:7:64", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "id": 15596, "nodeType": "ExpressionStatement", "src": "1408:7:64" } ] } }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 15605, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 15601, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 15599, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15576, "src": "1503:1:64", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3237", "id": 15600, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1508:2:64", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "1503:7:64", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 15604, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 15602, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15576, "src": "1514:1:64", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3238", "id": 15603, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1519:2:64", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_28_by_1", "typeString": "int_const 28" }, "value": "28" }, "src": "1514:7:64", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "1503:18:64", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": { "id": 15619, "nodeType": "Block", "src": "1573:56:64", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 15613, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15562, "src": "1604:4:64", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 15614, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15576, "src": "1610:1:64", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "argumentTypes": null, "id": 15615, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15570, "src": "1613:1:64", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 15616, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15573, "src": "1616:1:64", "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": 15612, "name": "ecrecover", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 16774, "src": "1594:9:64", "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": 15617, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1594:24:64", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 15568, "id": 15618, "nodeType": "Return", "src": "1587:31:64" } ] }, "id": 15620, "nodeType": "IfStatement", "src": "1499:130:64", "trueBody": { "id": 15611, "nodeType": "Block", "src": "1523:44:64", "statements": [ { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 15607, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1553:1:64", "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": 15606, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "1545:7:64", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 15608, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1545:10:64", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "id": 15609, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "1544:12:64", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 15568, "id": 15610, "nodeType": "Return", "src": "1537:19:64" } ] } } ] }, "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": 15622, "implemented": true, "kind": "function", "modifiers": [], "name": "recover", "nodeType": "FunctionDefinition", "parameters": { "id": 15565, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 15562, "name": "hash", "nodeType": "VariableDeclaration", "scope": 15622, "src": "626:12:64", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 15561, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "626:7:64", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 15564, "name": "signature", "nodeType": "VariableDeclaration", "scope": 15622, "src": "640:22:64", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 15563, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "640:5:64", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "625:38:64" }, "returnParameters": { "id": 15568, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 15567, "name": "", "nodeType": "VariableDeclaration", "scope": 15622, "src": "687:7:64", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 15566, "name": "address", "nodeType": "ElementaryTypeName", "src": "687:7:64", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "686:9:64" }, "scope": 15639, "src": "609:1026:64", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 15637, "nodeType": "Block", "src": "1863:187:64", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "19457468657265756d205369676e6564204d6573736167653a0a3332", "id": 15632, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2001:34:64", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_178a2411ab6fbc1ba11064408972259c558d0e82fd48b0aba3ad81d14f065e73", "typeString": "literal_string \"\u0019Ethereum Signed Message:\n32\"" }, "value": "\u0019Ethereum Signed Message:\n32" }, { "argumentTypes": null, "id": 15633, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 15624, "src": "2037:4:64", "typeDescriptions": { "typeIdentifier": "t_bytes32", 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