{ "contractName": "ECDSA", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.5.16+commit.9c3226ce\"},\"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\":\"istanbul\",\"libraries\":{},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"openzeppelin-solidity/contracts/cryptography/ECDSA.sol\":{\"keccak256\":\"0xb48974d92a87053dc1d6c5389f3d1b2ad522dec23afcb508eaa935d98dfdc0b6\",\"urls\":[\"bzz-raw://4ca542b4b005c3fa1b4e145f86cefc50cd5eb11e7df0d3b6daca5328a075f090\",\"dweb:/ipfs/QmQFNcoXCZvEPt2WWueAYvaMns16VdN6VvdPdEbUav876u\"]}},\"version\":1}", "bytecode": "0x60556023600b82828239805160001a607314601657fe5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea265627a7a72315820dc2936ab9e097b1902bc3e77daa087329f9e34fb9db604d45486fb6a0d5af39064736f6c63430005100032", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea265627a7a72315820dc2936ab9e097b1902bc3e77daa087329f9e34fb9db604d45486fb6a0d5af39064736f6c63430005100032", "sourceMap": "299:1753:73:-;;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": "299:1753:73:-;;;;;;;;", "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": [ 21028 ] }, "id": 21029, "nodeType": "SourceUnit", "nodes": [ { "id": 20949, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:73" }, { "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": 21028, "linearizedBaseContracts": [ 21028 ], "name": "ECDSA", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 21010, "nodeType": "Block", "src": "696:939:73", "statements": [ { "assignments": [ 20959 ], "declarations": [ { "constant": false, "id": 20959, "name": "r", "nodeType": "VariableDeclaration", "scope": 21010, "src": "706:9:73", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 20958, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "706:7:73", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 20960, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "706:9:73" }, { "assignments": [ 20962 ], "declarations": [ { "constant": false, "id": 20962, "name": "s", "nodeType": "VariableDeclaration", "scope": 21010, "src": "725:9:73", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 20961, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "725:7:73", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 20963, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "725:9:73" }, { "assignments": [ 20965 ], "declarations": [ { "constant": false, "id": 20965, "name": "v", "nodeType": "VariableDeclaration", "scope": 21010, "src": "744:7:73", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 20964, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "744:5:73", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": null, "visibility": "internal" } ], "id": 20966, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "744:7:73" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 20970, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 20967, "name": "signature", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20953, "src": "804:9:73", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 20968, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "804:16:73", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3635", "id": 20969, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "824:2:73", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_65_by_1", "typeString": "int_const 65" }, "value": "65" }, "src": "804:22:73", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 20977, "nodeType": "IfStatement", "src": "800:72:73", "trueBody": { "id": 20976, "nodeType": "Block", "src": "828:44:73", "statements": [ { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 20972, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "858:1:73", "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": 20971, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "850:7:73", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 20973, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "850:10:73", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "id": 20974, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "849:12:73", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 20957, "id": 20975, "nodeType": "Return", "src": "842:19:73" } ] } }, { "externalReferences": [ { "r": { "declaration": 20959, "isOffset": false, "isSlot": false, "src": "1140:1:73", "valueSize": 1 } }, { "signature": { "declaration": 20953, "isOffset": false, "isSlot": false, "src": "1155:9:73", "valueSize": 1 } }, { "v": { "declaration": 20965, "isOffset": false, "isSlot": false, "src": "1230:1:73", "valueSize": 1 } }, { "s": { "declaration": 20962, "isOffset": false, "isSlot": false, "src": "1185:1:73", "valueSize": 1 } }, { "signature": { "declaration": 20953, "isOffset": false, "isSlot": false, "src": "1200:9:73", "valueSize": 1 } }, { "signature": { "declaration": 20953, "isOffset": false, "isSlot": false, "src": "1253:9:73", "valueSize": 1 } } ], "id": 20978, "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": "1117:164:73" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 20981, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 20979, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20965, "src": "1386:1:73", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "<", "rightExpression": { "argumentTypes": null, "hexValue": "3237", "id": 20980, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1390:2:73", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "1386:6:73", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 20987, "nodeType": "IfStatement", "src": "1382:44:73", "trueBody": { "id": 20986, "nodeType": "Block", "src": "1394:32:73", "statements": [ { "expression": { "argumentTypes": null, "id": 20984, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 20982, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20965, "src": "1408:1:73", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "argumentTypes": null, "hexValue": "3237", "id": 20983, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1413:2:73", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "1408:7:73", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "id": 20985, "nodeType": "ExpressionStatement", "src": "1408:7:73" } ] } }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 20994, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 20990, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 20988, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20965, "src": "1503:1:73", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3237", "id": 20989, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1508:2:73", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "1503:7:73", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 20993, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 20991, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20965, "src": "1514:1:73", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3238", "id": 20992, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1519:2:73", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_28_by_1", "typeString": "int_const 28" }, "value": "28" }, "src": "1514:7:73", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "1503:18:73", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": { "id": 21008, "nodeType": "Block", "src": "1573:56:73", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 21002, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20951, "src": "1604:4:73", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 21003, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20965, "src": "1610:1:73", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "argumentTypes": null, "id": 21004, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20959, "src": "1613:1:73", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 21005, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20962, "src": "1616:1:73", "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": 21001, "name": "ecrecover", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 22163, "src": "1594:9:73", "typeDescriptions": { "typeIdentifier": "t_function_ecrecover_pure$_t_bytes32_$_t_uint8_$_t_bytes32_$_t_bytes32_$returns$_t_address_$", "typeString": "function (bytes32,uint8,bytes32,bytes32) pure returns (address)" } }, "id": 21006, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1594:24:73", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 20957, "id": 21007, "nodeType": "Return", "src": "1587:31:73" } ] }, "id": 21009, "nodeType": "IfStatement", "src": "1499:130:73", "trueBody": { "id": 21000, "nodeType": "Block", "src": "1523:44:73", "statements": [ { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 20996, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1553:1:73", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 20995, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "1545:7:73", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 20997, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1545:10:73", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "id": 20998, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "1544:12:73", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 20957, "id": 20999, "nodeType": "Return", "src": "1537:19:73" } ] } } ] }, "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": 21011, "implemented": true, "kind": "function", "modifiers": [], "name": "recover", "nodeType": "FunctionDefinition", "parameters": { "id": 20954, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20951, "name": "hash", "nodeType": "VariableDeclaration", "scope": 21011, "src": "626:12:73", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 20950, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "626:7:73", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 20953, "name": "signature", "nodeType": "VariableDeclaration", "scope": 21011, "src": "640:22:73", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 20952, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "640:5:73", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "625:38:73" }, "returnParameters": { "id": 20957, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20956, "name": "", "nodeType": "VariableDeclaration", "scope": 21011, "src": "687:7:73", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 20955, "name": "address", "nodeType": "ElementaryTypeName", "src": "687:7:73", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "686:9:73" }, "scope": 21028, "src": "609:1026:73", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 21026, "nodeType": "Block", "src": "1863:187:73", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "19457468657265756d205369676e6564204d6573736167653a0a3332", "id": 21021, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2001:34:73", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_178a2411ab6fbc1ba11064408972259c558d0e82fd48b0aba3ad81d14f065e73", "typeString": "literal_string \"\u0019Ethereum Signed Message:\n32\"" }, "value": "\u0019Ethereum Signed Message:\n32" }, { "argumentTypes": null, "id": 21022, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21013, "src": "2037:4:73", "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": 21019, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 22158, "src": "1984:3:73", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 21020, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodePacked", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "1984:16:73", "typeDescriptions": { "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 21023, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1984:58:73", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 21018, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 22165, "src": "1974:9:73", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 21024, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1974:69:73", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "functionReturnParameters": 21017, "id": 21025, "nodeType": "Return", "src": "1967:76:73" } ] }, "documentation": "toEthSignedMessageHash\n@dev prefix a bytes32 value with \"\\x19Ethereum Signed Message:\"\nand hash the result", "id": 21027, "implemented": true, "kind": "function", "modifiers": [], "name": "toEthSignedMessageHash", "nodeType": "FunctionDefinition", "parameters": { "id": 21014, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21013, "name": "hash", "nodeType": "VariableDeclaration", "scope": 21027, "src": "1817:12:73", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 21012, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1817:7:73", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "1816:14:73" }, "returnParameters": { "id": 21017, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 21016, "name": "", "nodeType": "VariableDeclaration", "scope": 21027, "src": "1854:7:73", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 21015, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1854:7:73", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "1853:9:73" }, "scope": 21028, "src": "1785:265:73", "stateMutability": "pure", "superFunction": null, "visibility": "internal" } ], "scope": 21029, "src": "299:1753:73" } ], "src": "0:2053:73" }, "legacyAST": { "absolutePath": "openzeppelin-solidity/contracts/cryptography/ECDSA.sol", "exportedSymbols": { "ECDSA": [ 21028 ] }, "id": 21029, "nodeType": "SourceUnit", "nodes": [ { "id": 20949, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:73" }, { "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": 21028, "linearizedBaseContracts": [ 21028 ], "name": "ECDSA", "nodeType": "ContractDefinition", "nodes": [ { "body": { "id": 21010, "nodeType": "Block", "src": "696:939:73", "statements": [ { "assignments": [ 20959 ], "declarations": [ { "constant": false, "id": 20959, "name": "r", "nodeType": "VariableDeclaration", "scope": 21010, "src": "706:9:73", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 20958, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "706:7:73", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 20960, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "706:9:73" }, { "assignments": [ 20962 ], "declarations": [ { "constant": false, "id": 20962, "name": "s", "nodeType": "VariableDeclaration", "scope": 21010, "src": "725:9:73", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 20961, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "725:7:73", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 20963, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "725:9:73" }, { "assignments": [ 20965 ], "declarations": [ { "constant": false, "id": 20965, "name": "v", "nodeType": "VariableDeclaration", "scope": 21010, "src": "744:7:73", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 20964, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "744:5:73", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "value": null, "visibility": "internal" } ], "id": 20966, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "744:7:73" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 20970, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 20967, "name": "signature", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20953, "src": "804:9:73", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 20968, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "804:16:73", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3635", "id": 20969, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "824:2:73", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_65_by_1", "typeString": "int_const 65" }, "value": "65" }, "src": "804:22:73", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 20977, "nodeType": "IfStatement", "src": "800:72:73", "trueBody": { "id": 20976, "nodeType": "Block", "src": "828:44:73", "statements": [ { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 20972, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "858:1:73", "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": 20971, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "850:7:73", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 20973, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "850:10:73", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "id": 20974, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "849:12:73", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 20957, "id": 20975, "nodeType": "Return", "src": "842:19:73" } ] } }, { "externalReferences": [ { "r": { "declaration": 20959, "isOffset": false, "isSlot": false, "src": "1140:1:73", "valueSize": 1 } }, { "signature": { "declaration": 20953, "isOffset": false, "isSlot": false, "src": "1155:9:73", "valueSize": 1 } }, { "v": { "declaration": 20965, "isOffset": false, "isSlot": false, "src": "1230:1:73", "valueSize": 1 } }, { "s": { "declaration": 20962, "isOffset": false, "isSlot": false, "src": "1185:1:73", "valueSize": 1 } }, { "signature": { "declaration": 20953, "isOffset": false, "isSlot": false, "src": "1200:9:73", "valueSize": 1 } }, { "signature": { "declaration": 20953, "isOffset": false, "isSlot": false, "src": "1253:9:73", "valueSize": 1 } } ], "id": 20978, "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": "1117:164:73" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 20981, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 20979, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20965, "src": "1386:1:73", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "<", "rightExpression": { "argumentTypes": null, "hexValue": "3237", "id": 20980, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1390:2:73", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "1386:6:73", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 20987, "nodeType": "IfStatement", "src": "1382:44:73", "trueBody": { "id": 20986, "nodeType": "Block", "src": "1394:32:73", "statements": [ { "expression": { "argumentTypes": null, "id": 20984, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 20982, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20965, "src": "1408:1:73", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "Assignment", "operator": "+=", "rightHandSide": { "argumentTypes": null, "hexValue": "3237", "id": 20983, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": 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"nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3237", "id": 20989, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1508:2:73", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "1503:7:73", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 20993, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 20991, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20965, "src": "1514:1:73", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "argumentTypes": null, "hexValue": "3238", "id": 20992, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1519:2:73", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_28_by_1", "typeString": "int_const 28" }, "value": "28" }, "src": "1514:7:73", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "1503:18:73", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": { "id": 21008, "nodeType": "Block", "src": "1573:56:73", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 21002, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20951, "src": "1604:4:73", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 21003, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20965, "src": "1610:1:73", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "argumentTypes": null, "id": 21004, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20959, "src": "1613:1:73", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "argumentTypes": null, "id": 21005, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 20962, "src": "1616:1:73", "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": 21001, "name": "ecrecover", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 22163, "src": "1594:9:73", "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": 21006, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1594:24:73", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 20957, "id": 21007, "nodeType": "Return", "src": "1587:31:73" } ] }, "id": 21009, "nodeType": "IfStatement", "src": "1499:130:73", "trueBody": { "id": 21000, "nodeType": "Block", "src": "1523:44:73", "statements": [ { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 20996, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "1553:1:73", "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": 20995, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "1545:7:73", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 20997, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1545:10:73", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "id": 20998, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "1544:12:73", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "functionReturnParameters": 20957, "id": 20999, "nodeType": "Return", "src": "1537:19:73" } ] } } ] }, "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": 21011, "implemented": true, "kind": "function", "modifiers": [], "name": "recover", "nodeType": "FunctionDefinition", "parameters": { "id": 20954, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20951, "name": "hash", "nodeType": "VariableDeclaration", "scope": 21011, "src": "626:12:73", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 20950, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "626:7:73", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 20953, "name": "signature", "nodeType": "VariableDeclaration", "scope": 21011, "src": "640:22:73", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 20952, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "640:5:73", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "src": "625:38:73" }, "returnParameters": { "id": 20957, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 20956, "name": "", "nodeType": "VariableDeclaration", "scope": 21011, "src": "687:7:73", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 20955, "name": "address", "nodeType": "ElementaryTypeName", "src": "687:7:73", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "686:9:73" }, "scope": 21028, "src": "609:1026:73", "stateMutability": "pure", "superFunction": null, "visibility": "internal" }, { "body": { "id": 21026, "nodeType": "Block", "src": "1863:187:73", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "19457468657265756d205369676e6564204d6573736167653a0a3332", "id": 21021, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2001:34:73", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_178a2411ab6fbc1ba11064408972259c558d0e82fd48b0aba3ad81d14f065e73", "typeString": "literal_string \"\u0019Ethereum Signed Message:\n32\"" }, "value": "\u0019Ethereum Signed Message:\n32" }, { "argumentTypes": null, "id": 21022, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 21013, "src": "2037:4:73", "typeDescriptions": { "typeIdentifier": "t_bytes32", 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