{ "contractName": "ECDSA", "abi": [], "metadata": "{\"compiler\":{\"version\":\"0.8.11+commit.d7f03943\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"details\":\"Elliptic Curve Digital Signature Algorithm (ECDSA) operations. These functions can be used to verify that a message was signed by the holder of the private keys of a given address.\",\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"@openzeppelin/contracts/utils/cryptography/ECDSA.sol\":\"ECDSA\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":true,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/utils/Strings.sol\":{\"keccak256\":\"0x32c202bd28995dd20c4347b7c6467a6d3241c74c8ad3edcbb610cd9205916c45\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://8179c356adb19e70d6b31a1eedc8c5c7f0c00e669e2540f4099e3844c6074d30\",\"dweb:/ipfs/QmWFbivarEobbqhS1go64ootVuHfVohBseerYy9FTEd1W2\"]},\"@openzeppelin/contracts/utils/cryptography/ECDSA.sol\":{\"keccak256\":\"0x3c07f43e60e099b3b157243b3152722e73b80eeb7985c2cd73712828d7f7da29\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://466ffb5a6e3bd65fffd996f9287ffd240ea21588a338c6efe143d94eaed014a7\",\"dweb:/ipfs/Qmans3vvPJZcvxe9KLAPc9Xwe4TFVTJdzaQGpi62Vrhoe2\"]}},\"version\":1}", "bytecode": "0x60566037600b82828239805160001a607314602a57634e487b7160e01b600052600060045260246000fd5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220de70ab4c4492107b4d16ccde527bdb1e63e4e7224c279b46954e4a5c9886059c64736f6c634300080b0033", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220de70ab4c4492107b4d16ccde527bdb1e63e4e7224c279b46954e4a5c9886059c64736f6c634300080b0033", "immutableReferences": {}, "generatedSources": [], "deployedGeneratedSources": [], "sourceMap": "369:8924:30:-:0;;;;;;;;;;;;;;;-1:-1:-1;;;369:8924:30;;;;;;;;;;;;;;;;;", "deployedSourceMap": "369:8924:30:-:0;;;;;;;;", "source": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../Strings.sol\";\n\n/**\n * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.\n *\n * These functions can be used to verify that a message was signed by the holder\n * of the private keys of a given address.\n */\nlibrary ECDSA {\n enum RecoverError {\n NoError,\n InvalidSignature,\n InvalidSignatureLength,\n InvalidSignatureS,\n InvalidSignatureV\n }\n\n function _throwError(RecoverError error) private pure {\n if (error == RecoverError.NoError) {\n return; // no error: do nothing\n } else if (error == RecoverError.InvalidSignature) {\n revert(\"ECDSA: invalid signature\");\n } else if (error == RecoverError.InvalidSignatureLength) {\n revert(\"ECDSA: invalid signature length\");\n } else if (error == RecoverError.InvalidSignatureS) {\n revert(\"ECDSA: invalid signature 's' value\");\n } else if (error == RecoverError.InvalidSignatureV) {\n revert(\"ECDSA: invalid signature 'v' value\");\n }\n }\n\n /**\n * @dev Returns the address that signed a hashed message (`hash`) with\n * `signature` or error string. This address can then be used for verification purposes.\n *\n * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n * this function rejects them by requiring the `s` value to be in the lower\n * half order, and the `v` value to be either 27 or 28.\n *\n * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n * verification to be secure: it is possible to craft signatures that\n * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n * this is by receiving a hash of the original message (which may otherwise\n * be too long), and then calling {toEthSignedMessageHash} on it.\n *\n * Documentation for signature generation:\n * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]\n * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]\n *\n * _Available since v4.3._\n */\n function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {\n // Check the signature length\n // - case 65: r,s,v signature (standard)\n // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._\n if (signature.length == 65) {\n bytes32 r;\n bytes32 s;\n uint8 v;\n // ecrecover takes the signature parameters, and the only way to get them\n // currently is to use 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 return tryRecover(hash, v, r, s);\n } else if (signature.length == 64) {\n bytes32 r;\n bytes32 vs;\n // ecrecover takes the signature parameters, and the only way to get them\n // currently is to use assembly.\n assembly {\n r := mload(add(signature, 0x20))\n vs := mload(add(signature, 0x40))\n }\n return tryRecover(hash, r, vs);\n } else {\n return (address(0), RecoverError.InvalidSignatureLength);\n }\n }\n\n /**\n * @dev Returns the address that signed a hashed message (`hash`) with\n * `signature`. This address can then be used for verification purposes.\n *\n * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n * this function rejects them by requiring the `s` value to be in the lower\n * half order, and the `v` value to be either 27 or 28.\n *\n * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n * verification to be secure: it is possible to craft signatures that\n * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n * this is by receiving a hash of the original message (which may otherwise\n * be too long), and then calling {toEthSignedMessageHash} on it.\n */\n function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {\n (address recovered, RecoverError error) = tryRecover(hash, signature);\n _throwError(error);\n return recovered;\n }\n\n /**\n * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.\n *\n * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]\n *\n * _Available since v4.3._\n */\n function tryRecover(\n bytes32 hash,\n bytes32 r,\n bytes32 vs\n ) internal pure returns (address, RecoverError) {\n bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);\n uint8 v = uint8((uint256(vs) >> 255) + 27);\n return tryRecover(hash, v, r, s);\n }\n\n /**\n * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.\n *\n * _Available since v4.2._\n */\n function recover(\n bytes32 hash,\n bytes32 r,\n bytes32 vs\n ) internal pure returns (address) {\n (address recovered, RecoverError error) = tryRecover(hash, r, vs);\n _throwError(error);\n return recovered;\n }\n\n /**\n * @dev Overload of {ECDSA-tryRecover} that receives the `v`,\n * `r` and `s` signature fields separately.\n *\n * _Available since v4.3._\n */\n function tryRecover(\n bytes32 hash,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) internal pure returns (address, RecoverError) {\n // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature\n // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines\n // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most\n // signatures from current libraries generate a unique signature with an s-value in the lower half order.\n //\n // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value\n // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or\n // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept\n // these malleable signatures as well.\n if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {\n return (address(0), RecoverError.InvalidSignatureS);\n }\n if (v != 27 && v != 28) {\n return (address(0), RecoverError.InvalidSignatureV);\n }\n\n // If the signature is valid (and not malleable), return the signer address\n address signer = ecrecover(hash, v, r, s);\n if (signer == address(0)) {\n return (address(0), RecoverError.InvalidSignature);\n }\n\n return (signer, RecoverError.NoError);\n }\n\n /**\n * @dev Overload of {ECDSA-recover} that receives the `v`,\n * `r` and `s` signature fields separately.\n */\n function recover(\n bytes32 hash,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) internal pure returns (address) {\n (address recovered, RecoverError error) = tryRecover(hash, v, r, s);\n _throwError(error);\n return recovered;\n }\n\n /**\n * @dev Returns an Ethereum Signed Message, created from a `hash`. This\n * produces hash corresponding to the one signed with the\n * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n * JSON-RPC method as part of EIP-191.\n *\n * See {recover}.\n */\n function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {\n // 32 is the length in bytes of hash,\n // enforced by the type signature above\n return keccak256(abi.encodePacked(\"\\x19Ethereum Signed Message:\\n32\", hash));\n }\n\n /**\n * @dev Returns an Ethereum Signed Message, created from `s`. This\n * produces hash corresponding to the one signed with the\n * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n * JSON-RPC method as part of EIP-191.\n *\n * See {recover}.\n */\n function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {\n return keccak256(abi.encodePacked(\"\\x19Ethereum Signed Message:\\n\", Strings.toString(s.length), s));\n }\n\n /**\n * @dev Returns an Ethereum Signed Typed Data, created from a\n * `domainSeparator` and a `structHash`. This produces hash corresponding\n * to the one signed with the\n * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]\n * JSON-RPC method as part of EIP-712.\n *\n * See {recover}.\n */\n function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {\n return keccak256(abi.encodePacked(\"\\x19\\x01\", domainSeparator, structHash));\n }\n}\n", "sourcePath": "@openzeppelin/contracts/utils/cryptography/ECDSA.sol", "ast": { "absolutePath": "@openzeppelin/contracts/utils/cryptography/ECDSA.sol", "exportedSymbols": { "ECDSA": [ 5981 ], "Strings": [ 5574 ] }, "id": 5982, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 5576, "literals": [ "solidity", "^", "0.8", ".0" ], "nodeType": "PragmaDirective", "src": "112:23:30" }, { "absolutePath": "@openzeppelin/contracts/utils/Strings.sol", "file": "../Strings.sol", "id": 5577, "nameLocation": "-1:-1:-1", "nodeType": "ImportDirective", "scope": 5982, "sourceUnit": 5575, "src": 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This address can then be used for verification purposes.\n The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n this function rejects them by requiring the `s` value to be in the lower\n half order, and the `v` value to be either 27 or 28.\n IMPORTANT: `hash` _must_ be the result of a hash operation for the\n verification to be secure: it is possible to craft signatures that\n recover to arbitrary addresses for non-hashed data. A safe way to ensure\n this is by receiving a hash of the original message (which may otherwise\n be too long), and then calling {toEthSignedMessageHash} on it.\n Documentation for signature generation:\n - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]\n - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]\n _Available since v4.3._" }, "id": 5703, "implemented": true, "kind": "function", "modifiers": [], "name": "tryRecover", "nameLocation": "2252:10:30", "nodeType": "FunctionDefinition", "parameters": { "id": 5644, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5641, "mutability": "mutable", "name": "hash", "nameLocation": "2271:4:30", "nodeType": "VariableDeclaration", "scope": 5703, "src": "2263:12:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5640, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "2263:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" }, { "constant": false, "id": 5643, "mutability": "mutable", "name": "signature", "nameLocation": "2290:9:30", "nodeType": "VariableDeclaration", "scope": 5703, "src": "2277:22:30", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 5642, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "2277:5:30", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "2262:38:30" }, "returnParameters": { "id": 5650, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5646, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 5703, "src": "2324:7:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5645, "name": "address", "nodeType": "ElementaryTypeName", "src": "2324:7:30", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 5649, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 5703, "src": "2333:12:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" }, "typeName": { "id": 5648, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 5647, "name": "RecoverError", "nodeType": "IdentifierPath", "referencedDeclaration": 5584, "src": "2333:12:30" }, "referencedDeclaration": 5584, "src": "2333:12:30", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } }, "visibility": "internal" } ], "src": "2323:23:30" }, "scope": 5981, "src": "2243:1279:30", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 5729, "nodeType": "Block", "src": "4395:140:30", "statements": [ { "assignments": [ 5714, 5717 ], "declarations": [ { "constant": false, "id": 5714, "mutability": "mutable", "name": "recovered", "nameLocation": "4414:9:30", "nodeType": "VariableDeclaration", "scope": 5729, "src": "4406:17:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5713, "name": "address", "nodeType": "ElementaryTypeName", "src": "4406:7:30", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 5717, "mutability": "mutable", "name": "error", "nameLocation": "4438:5:30", "nodeType": "VariableDeclaration", "scope": 5729, "src": "4425:18:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" }, "typeName": { "id": 5716, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 5715, "name": "RecoverError", "nodeType": "IdentifierPath", "referencedDeclaration": 5584, "src": "4425:12:30" }, "referencedDeclaration": 5584, "src": "4425:12:30", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } }, "visibility": "internal" } ], "id": 5722, "initialValue": { "arguments": [ { "id": 5719, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5706, "src": "4458:4:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 5720, "name": "signature", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5708, "src": "4464:9:30", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 5718, "name": "tryRecover", "nodeType": "Identifier", "overloadedDeclarations": [ 5703, 5777, 5888 ], "referencedDeclaration": 5703, "src": "4447:10:30", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes32_$_t_bytes_memory_ptr_$returns$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "function (bytes32,bytes memory) pure returns (address,enum ECDSA.RecoverError)" } }, "id": 5721, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4447:27:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "tuple(address,enum ECDSA.RecoverError)" } }, "nodeType": "VariableDeclarationStatement", "src": "4405:69:30" }, { "expression": { "arguments": [ { "id": 5724, "name": "error", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5717, "src": "4496:5:30", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } ], "id": 5723, "name": "_throwError", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5638, "src": "4484:11:30", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_enum$_RecoverError_$5584_$returns$__$", "typeString": "function (enum ECDSA.RecoverError) pure" } }, "id": 5725, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4484:18:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 5726, "nodeType": "ExpressionStatement", "src": "4484:18:30" }, { "expression": { "id": 5727, "name": "recovered", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5714, "src": "4519:9:30", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 5712, "id": 5728, "nodeType": "Return", "src": "4512:16:30" } ] }, "documentation": { "id": 5704, "nodeType": "StructuredDocumentation", "src": "3528:775:30", "text": " @dev Returns the address that signed a hashed message (`hash`) with\n `signature`. This address can then be used for verification purposes.\n The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n this function rejects them by requiring the `s` value to be in the lower\n half order, and the `v` value to be either 27 or 28.\n IMPORTANT: `hash` _must_ be the result of a hash operation for the\n verification to be secure: it is possible to craft signatures that\n recover to arbitrary addresses for non-hashed data. A safe way to ensure\n this is by receiving a hash of the original message (which may otherwise\n be too long), and then calling {toEthSignedMessageHash} on it." }, "id": 5730, "implemented": true, "kind": "function", "modifiers": [], "name": "recover", "nameLocation": "4317:7:30", "nodeType": "FunctionDefinition", "parameters": { "id": 5709, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5706, "mutability": "mutable", "name": "hash", "nameLocation": "4333:4:30", "nodeType": "VariableDeclaration", "scope": 5730, "src": "4325:12:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5705, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "4325:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" }, { "constant": false, "id": 5708, "mutability": "mutable", "name": "signature", "nameLocation": "4352:9:30", "nodeType": "VariableDeclaration", "scope": 5730, "src": "4339:22:30", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 5707, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "4339:5:30", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "4324:38:30" }, "returnParameters": { "id": 5712, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5711, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 5730, "src": "4386:7:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5710, "name": "address", "nodeType": "ElementaryTypeName", "src": "4386:7:30", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "4385:9:30" }, "scope": 5981, "src": "4308:227:30", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 5776, "nodeType": "Block", "src": "4922:203:30", "statements": [ { "assignments": [ 5746 ], "declarations": [ { "constant": false, "id": 5746, "mutability": "mutable", "name": "s", "nameLocation": "4940:1:30", "nodeType": "VariableDeclaration", "scope": 5776, "src": "4932:9:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5745, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "4932:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "id": 5753, "initialValue": { "commonType": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "id": 5752, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 5747, "name": "vs", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5737, "src": "4944:2:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "nodeType": "BinaryOperation", "operator": "&", "rightExpression": { "arguments": [ { "hexValue": "307837666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666", "id": 5750, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "4957:66:30", "typeDescriptions": { "typeIdentifier": "t_rational_57896044618658097711785492504343953926634992332820282019728792003956564819967_by_1", "typeString": "int_const 5789...(69 digits omitted)...9967" }, "value": "0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_57896044618658097711785492504343953926634992332820282019728792003956564819967_by_1", "typeString": "int_const 5789...(69 digits omitted)...9967" } ], "id": 5749, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "4949:7:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_bytes32_$", "typeString": "type(bytes32)" }, "typeName": { "id": 5748, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "4949:7:30", "typeDescriptions": {} } }, "id": 5751, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4949:75:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "src": "4944:80:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "nodeType": "VariableDeclarationStatement", "src": "4932:92:30" }, { "assignments": [ 5755 ], "declarations": [ { "constant": false, "id": 5755, "mutability": "mutable", "name": "v", "nameLocation": "5040:1:30", "nodeType": "VariableDeclaration", "scope": 5776, "src": "5034:7:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 5754, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "5034:5:30", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "visibility": "internal" } ], "id": 5768, "initialValue": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 5766, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "components": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 5763, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "id": 5760, "name": "vs", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5737, "src": "5059:2:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 5759, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5051:7:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_uint256_$", "typeString": "type(uint256)" }, "typeName": { "id": 5758, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5051:7:30", "typeDescriptions": {} } }, "id": 5761, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5051:11:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">>", "rightExpression": { "hexValue": "323535", "id": 5762, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5066:3:30", "typeDescriptions": { "typeIdentifier": "t_rational_255_by_1", "typeString": "int_const 255" }, "value": "255" }, "src": "5051:18:30", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "id": 5764, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "5050:20:30", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "hexValue": "3237", "id": 5765, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5073:2:30", "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "5050:25:30", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 5757, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5044:5:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_uint8_$", "typeString": "type(uint8)" }, "typeName": { "id": 5756, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "5044:5:30", "typeDescriptions": {} } }, "id": 5767, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5044:32:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "VariableDeclarationStatement", "src": "5034:42:30" }, { "expression": { "arguments": [ { "id": 5770, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5733, "src": "5104:4:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 5771, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5755, "src": "5110:1:30", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "id": 5772, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5735, "src": "5113:1:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 5773, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5746, "src": "5116:1:30", "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": 5769, "name": "tryRecover", "nodeType": "Identifier", "overloadedDeclarations": [ 5703, 5777, 5888 ], "referencedDeclaration": 5888, "src": "5093:10:30", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes32_$_t_uint8_$_t_bytes32_$_t_bytes32_$returns$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "function (bytes32,uint8,bytes32,bytes32) pure returns (address,enum ECDSA.RecoverError)" } }, "id": 5774, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5093:25:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "tuple(address,enum ECDSA.RecoverError)" } }, "functionReturnParameters": 5744, "id": 5775, "nodeType": "Return", "src": "5086:32:30" } ] }, "documentation": { "id": 5731, "nodeType": "StructuredDocumentation", "src": "4541:243:30", "text": " @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.\n See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]\n _Available since v4.3._" }, "id": 5777, "implemented": true, "kind": "function", "modifiers": [], "name": "tryRecover", "nameLocation": "4798:10:30", "nodeType": "FunctionDefinition", "parameters": { "id": 5738, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5733, "mutability": "mutable", "name": "hash", "nameLocation": "4826:4:30", "nodeType": "VariableDeclaration", "scope": 5777, "src": "4818:12:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5732, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "4818:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" }, { "constant": false, "id": 5735, "mutability": "mutable", "name": "r", "nameLocation": "4848:1:30", "nodeType": "VariableDeclaration", "scope": 5777, "src": "4840:9:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5734, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "4840:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" }, { "constant": false, "id": 5737, "mutability": "mutable", "name": "vs", "nameLocation": "4867:2:30", "nodeType": "VariableDeclaration", "scope": 5777, "src": "4859:10:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5736, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "4859:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "src": "4808:67:30" }, "returnParameters": { "id": 5744, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5740, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 5777, "src": "4899:7:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5739, "name": "address", "nodeType": "ElementaryTypeName", "src": "4899:7:30", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 5743, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 5777, "src": "4908:12:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" }, "typeName": { "id": 5742, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 5741, "name": "RecoverError", "nodeType": "IdentifierPath", "referencedDeclaration": 5584, "src": "4908:12:30" }, "referencedDeclaration": 5584, "src": "4908:12:30", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } }, "visibility": "internal" } ], "src": "4898:23:30" }, "scope": 5981, "src": "4789:336:30", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 5806, "nodeType": "Block", "src": "5406:136:30", "statements": [ { "assignments": [ 5790, 5793 ], "declarations": [ { "constant": false, "id": 5790, "mutability": "mutable", "name": "recovered", "nameLocation": "5425:9:30", "nodeType": "VariableDeclaration", "scope": 5806, "src": "5417:17:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5789, "name": "address", "nodeType": "ElementaryTypeName", "src": "5417:7:30", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 5793, "mutability": "mutable", "name": "error", "nameLocation": "5449:5:30", "nodeType": "VariableDeclaration", "scope": 5806, "src": "5436:18:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" }, "typeName": { "id": 5792, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 5791, "name": "RecoverError", "nodeType": "IdentifierPath", "referencedDeclaration": 5584, "src": "5436:12:30" }, "referencedDeclaration": 5584, "src": "5436:12:30", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } }, "visibility": "internal" } ], "id": 5799, "initialValue": { "arguments": [ { "id": 5795, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5780, "src": "5469:4:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 5796, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5782, "src": "5475:1:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 5797, "name": "vs", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5784, "src": "5478:2:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 5794, "name": "tryRecover", "nodeType": "Identifier", "overloadedDeclarations": [ 5703, 5777, 5888 ], "referencedDeclaration": 5777, "src": "5458:10:30", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes32_$_t_bytes32_$_t_bytes32_$returns$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "function (bytes32,bytes32,bytes32) pure returns (address,enum ECDSA.RecoverError)" } }, "id": 5798, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5458:23:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "tuple(address,enum ECDSA.RecoverError)" } }, "nodeType": "VariableDeclarationStatement", "src": "5416:65:30" }, { "expression": { "arguments": [ { "id": 5801, "name": "error", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5793, "src": "5503:5:30", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } ], "id": 5800, "name": "_throwError", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5638, "src": "5491:11:30", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_enum$_RecoverError_$5584_$returns$__$", "typeString": "function (enum ECDSA.RecoverError) pure" } }, "id": 5802, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5491:18:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 5803, "nodeType": "ExpressionStatement", "src": "5491:18:30" }, { "expression": { "id": 5804, "name": "recovered", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5790, "src": "5526:9:30", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 5788, "id": 5805, "nodeType": "Return", "src": "5519:16:30" } ] }, "documentation": { "id": 5778, "nodeType": "StructuredDocumentation", "src": "5131:154:30", "text": " @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.\n _Available since v4.2._" }, "id": 5807, "implemented": true, "kind": "function", "modifiers": [], "name": "recover", "nameLocation": "5299:7:30", "nodeType": "FunctionDefinition", "parameters": { "id": 5785, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5780, "mutability": "mutable", "name": "hash", "nameLocation": "5324:4:30", "nodeType": "VariableDeclaration", "scope": 5807, "src": "5316:12:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5779, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "5316:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" }, { "constant": false, "id": 5782, "mutability": "mutable", "name": "r", "nameLocation": "5346:1:30", "nodeType": "VariableDeclaration", "scope": 5807, "src": "5338:9:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5781, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "5338:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" }, { "constant": false, "id": 5784, "mutability": "mutable", "name": "vs", "nameLocation": "5365:2:30", "nodeType": "VariableDeclaration", "scope": 5807, "src": "5357:10:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5783, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "5357:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "src": "5306:67:30" }, "returnParameters": { "id": 5788, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5787, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 5807, "src": "5397:7:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5786, "name": "address", "nodeType": "ElementaryTypeName", "src": "5397:7:30", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "5396:9:30" }, "scope": 5981, "src": "5290:252:30", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 5887, "nodeType": "Block", "src": "5865:1454:30", "statements": [ { "condition": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 5829, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "id": 5826, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5816, "src": "6761:1:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 5825, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "6753:7:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_uint256_$", "typeString": "type(uint256)" }, "typeName": { "id": 5824, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6753:7:30", "typeDescriptions": {} } }, "id": 5827, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6753:10:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">", "rightExpression": { "hexValue": "307837464646464646464646464646464646464646464646464646464646464646463544353736453733353741343530314444464539324634363638314232304130", "id": 5828, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6766:66:30", "typeDescriptions": { "typeIdentifier": "t_rational_57896044618658097711785492504343953926418782139537452191302581570759080747168_by_1", "typeString": "int_const 5789...(69 digits omitted)...7168" }, "value": "0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0" }, "src": "6753:79:30", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 5839, "nodeType": "IfStatement", "src": "6749:161:30", "trueBody": { "id": 5838, "nodeType": "Block", "src": "6834:76:30", "statements": [ { "expression": { "components": [ { "arguments": [ { "hexValue": "30", "id": 5832, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6864:1:30", "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": 5831, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "6856:7:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 5830, "name": "address", "nodeType": "ElementaryTypeName", "src": "6856:7:30", "typeDescriptions": {} } }, "id": 5833, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6856:10:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "expression": { "id": 5834, "name": "RecoverError", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5584, "src": "6868:12:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_enum$_RecoverError_$5584_$", "typeString": "type(enum ECDSA.RecoverError)" } }, "id": 5835, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "InvalidSignatureS", "nodeType": "MemberAccess", "referencedDeclaration": 5582, "src": "6868:30:30", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } } ], "id": 5836, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "6855:44:30", "typeDescriptions": { "typeIdentifier": "t_tuple$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "tuple(address,enum ECDSA.RecoverError)" } }, "functionReturnParameters": 5823, "id": 5837, "nodeType": "Return", "src": "6848:51:30" } ] } }, { "condition": { "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 5846, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 5842, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 5840, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5812, "src": "6923:1:30", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "hexValue": "3237", "id": 5841, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6928:2:30", "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "6923:7:30", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 5845, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 5843, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5812, "src": "6934:1:30", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "hexValue": "3238", "id": 5844, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6939:2:30", "typeDescriptions": { "typeIdentifier": "t_rational_28_by_1", "typeString": "int_const 28" }, "value": "28" }, "src": "6934:7:30", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "6923:18:30", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 5856, "nodeType": "IfStatement", "src": "6919:100:30", "trueBody": { "id": 5855, "nodeType": "Block", "src": "6943:76:30", "statements": [ { "expression": { "components": [ { "arguments": [ { "hexValue": "30", "id": 5849, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6973:1:30", "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": 5848, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "6965:7:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 5847, "name": "address", "nodeType": "ElementaryTypeName", "src": "6965:7:30", "typeDescriptions": {} } }, "id": 5850, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6965:10:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "expression": { "id": 5851, "name": "RecoverError", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5584, "src": "6977:12:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_enum$_RecoverError_$5584_$", "typeString": "type(enum ECDSA.RecoverError)" } }, "id": 5852, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "InvalidSignatureV", "nodeType": "MemberAccess", "referencedDeclaration": 5583, "src": "6977:30:30", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } } ], "id": 5853, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "6964:44:30", "typeDescriptions": { "typeIdentifier": "t_tuple$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "tuple(address,enum ECDSA.RecoverError)" } }, "functionReturnParameters": 5823, "id": 5854, "nodeType": "Return", "src": "6957:51:30" } ] } }, { "assignments": [ 5858 ], "declarations": [ { "constant": false, "id": 5858, "mutability": "mutable", "name": "signer", "nameLocation": "7121:6:30", "nodeType": "VariableDeclaration", "scope": 5887, "src": "7113:14:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5857, "name": "address", "nodeType": "ElementaryTypeName", "src": "7113:7:30", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "id": 5865, "initialValue": { "arguments": [ { "id": 5860, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5810, "src": "7140:4:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 5861, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5812, "src": "7146:1:30", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "id": 5862, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5814, "src": "7149:1:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 5863, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5816, "src": "7152:1:30", "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": 5859, "name": "ecrecover", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967290, "src": "7130:9:30", "typeDescriptions": { "typeIdentifier": "t_function_ecrecover_pure$_t_bytes32_$_t_uint8_$_t_bytes32_$_t_bytes32_$returns$_t_address_$", "typeString": "function (bytes32,uint8,bytes32,bytes32) pure returns (address)" } }, "id": 5864, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7130:24:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "VariableDeclarationStatement", "src": "7113:41:30" }, { "condition": { "commonType": { "typeIdentifier": "t_address", "typeString": "address" }, "id": 5871, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 5866, "name": "signer", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5858, "src": "7168:6:30", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "arguments": [ { "hexValue": "30", "id": 5869, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7186:1:30", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 5868, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7178:7:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 5867, "name": "address", "nodeType": "ElementaryTypeName", "src": "7178:7:30", "typeDescriptions": {} } }, "id": 5870, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "7178:10:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "7168:20:30", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 5881, "nodeType": "IfStatement", "src": "7164:101:30", "trueBody": { "id": 5880, "nodeType": "Block", "src": "7190:75:30", "statements": [ { "expression": { "components": [ { "arguments": [ { "hexValue": "30", "id": 5874, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "7220:1:30", "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 5873, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "7212:7:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 5872, "name": "address", "nodeType": "ElementaryTypeName", 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This\n produces hash corresponding to the one signed with the\n https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n JSON-RPC method as part of EIP-191.\n See {recover}." }, "id": 5938, "implemented": true, "kind": "function", "modifiers": [], "name": "toEthSignedMessageHash", "nameLocation": "8021:22:30", "nodeType": "FunctionDefinition", "parameters": { "id": 5925, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5924, "mutability": "mutable", "name": "hash", "nameLocation": "8052:4:30", "nodeType": "VariableDeclaration", "scope": 5938, "src": "8044:12:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5923, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "8044:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "src": "8043:14:30" }, "returnParameters": { "id": 5928, 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"contractDependencies": [], "contractKind": "library", "documentation": { "id": 5578, "nodeType": "StructuredDocumentation", "src": "163:205:30", "text": " @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.\n These functions can be used to verify that a message was signed by the holder\n of the private keys of a given address." }, "fullyImplemented": true, "id": 5981, "linearizedBaseContracts": [ 5981 ], "name": "ECDSA", "nameLocation": "377:5:30", "nodeType": "ContractDefinition", "nodes": [ { "canonicalName": "ECDSA.RecoverError", "id": 5584, "members": [ { "id": 5579, "name": "NoError", "nameLocation": "417:7:30", "nodeType": "EnumValue", "src": "417:7:30" }, { "id": 5580, "name": "InvalidSignature", "nameLocation": "434:16:30", "nodeType": "EnumValue", "src": "434:16:30" }, { "id": 5581, "name": "InvalidSignatureLength", "nameLocation": "460:22:30", "nodeType": "EnumValue", "src": "460:22:30" }, { "id": 5582, "name": "InvalidSignatureS", "nameLocation": 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"lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2990:25:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "tuple(address,enum ECDSA.RecoverError)" } }, "functionReturnParameters": 5650, "id": 5671, "nodeType": "Return", "src": "2983:32:30" } ] } } ] }, "documentation": { "id": 5639, "nodeType": "StructuredDocumentation", "src": "1185:1053:30", "text": " @dev Returns the address that signed a hashed message (`hash`) with\n `signature` or error string. This address can then be used for verification purposes.\n The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n this function rejects them by requiring the `s` value to be in the lower\n half order, and the `v` value to be either 27 or 28.\n IMPORTANT: `hash` _must_ be the result of a hash operation for the\n verification to be secure: it is possible to craft signatures that\n recover to arbitrary addresses for non-hashed data. A safe way to ensure\n this is by receiving a hash of the original message (which may otherwise\n be too long), and then calling {toEthSignedMessageHash} on it.\n Documentation for signature generation:\n - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]\n - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]\n _Available since v4.3._" }, "id": 5703, "implemented": true, "kind": "function", "modifiers": [], "name": "tryRecover", "nameLocation": "2252:10:30", "nodeType": "FunctionDefinition", "parameters": { "id": 5644, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5641, "mutability": "mutable", "name": "hash", "nameLocation": "2271:4:30", "nodeType": "VariableDeclaration", "scope": 5703, "src": "2263:12:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5640, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "2263:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" }, { "constant": false, "id": 5643, "mutability": "mutable", "name": "signature", "nameLocation": "2290:9:30", "nodeType": "VariableDeclaration", "scope": 5703, "src": "2277:22:30", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 5642, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "2277:5:30", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "2262:38:30" }, "returnParameters": { "id": 5650, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5646, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 5703, "src": "2324:7:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5645, "name": "address", "nodeType": "ElementaryTypeName", "src": "2324:7:30", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 5649, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 5703, "src": "2333:12:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" }, "typeName": { "id": 5648, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 5647, "name": "RecoverError", "nodeType": "IdentifierPath", "referencedDeclaration": 5584, "src": "2333:12:30" }, "referencedDeclaration": 5584, "src": "2333:12:30", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } }, "visibility": "internal" } ], "src": "2323:23:30" }, "scope": 5981, "src": "2243:1279:30", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 5729, "nodeType": "Block", "src": "4395:140:30", "statements": [ { "assignments": [ 5714, 5717 ], "declarations": [ { "constant": false, "id": 5714, "mutability": "mutable", "name": "recovered", "nameLocation": "4414:9:30", "nodeType": "VariableDeclaration", "scope": 5729, "src": "4406:17:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5713, "name": "address", "nodeType": "ElementaryTypeName", "src": "4406:7:30", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" }, { "constant": false, "id": 5717, "mutability": "mutable", "name": "error", "nameLocation": "4438:5:30", "nodeType": "VariableDeclaration", "scope": 5729, "src": "4425:18:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" }, "typeName": { "id": 5716, "nodeType": "UserDefinedTypeName", "pathNode": { "id": 5715, "name": "RecoverError", "nodeType": "IdentifierPath", "referencedDeclaration": 5584, "src": "4425:12:30" }, "referencedDeclaration": 5584, "src": "4425:12:30", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } }, "visibility": "internal" } ], "id": 5722, "initialValue": { "arguments": [ { "id": 5719, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5706, "src": "4458:4:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 5720, "name": "signature", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5708, "src": "4464:9:30", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 5718, "name": "tryRecover", "nodeType": "Identifier", "overloadedDeclarations": [ 5703, 5777, 5888 ], "referencedDeclaration": 5703, "src": "4447:10:30", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes32_$_t_bytes_memory_ptr_$returns$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "function (bytes32,bytes memory) pure returns (address,enum ECDSA.RecoverError)" } }, "id": 5721, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4447:27:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "tuple(address,enum ECDSA.RecoverError)" } }, "nodeType": "VariableDeclarationStatement", "src": "4405:69:30" }, { "expression": { "arguments": [ { "id": 5724, "name": "error", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5717, "src": "4496:5:30", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } ], "id": 5723, "name": "_throwError", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5638, "src": "4484:11:30", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_enum$_RecoverError_$5584_$returns$__$", "typeString": "function (enum ECDSA.RecoverError) pure" } }, "id": 5725, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4484:18:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 5726, "nodeType": "ExpressionStatement", "src": "4484:18:30" }, { "expression": { "id": 5727, "name": "recovered", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5714, "src": "4519:9:30", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 5712, "id": 5728, "nodeType": "Return", "src": "4512:16:30" } ] }, "documentation": { "id": 5704, "nodeType": "StructuredDocumentation", "src": "3528:775:30", "text": " @dev Returns the address that signed a hashed message (`hash`) with\n `signature`. This address can then be used for verification purposes.\n The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n this function rejects them by requiring the `s` value to be in the lower\n half order, and the `v` value to be either 27 or 28.\n IMPORTANT: `hash` _must_ be the result of a hash operation for the\n verification to be secure: it is possible to craft signatures that\n recover to arbitrary addresses for non-hashed data. A safe way to ensure\n this is by receiving a hash of the original message (which may otherwise\n be too long), and then calling {toEthSignedMessageHash} on it." }, "id": 5730, "implemented": true, "kind": "function", "modifiers": [], "name": "recover", "nameLocation": "4317:7:30", "nodeType": "FunctionDefinition", "parameters": { "id": 5709, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5706, "mutability": "mutable", "name": "hash", "nameLocation": "4333:4:30", "nodeType": "VariableDeclaration", "scope": 5730, "src": "4325:12:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5705, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "4325:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" }, { "constant": false, "id": 5708, "mutability": "mutable", "name": "signature", "nameLocation": "4352:9:30", "nodeType": "VariableDeclaration", "scope": 5730, "src": "4339:22:30", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 5707, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "4339:5:30", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "4324:38:30" }, "returnParameters": { "id": 5712, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5711, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 5730, "src": "4386:7:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5710, "name": "address", "nodeType": "ElementaryTypeName", "src": "4386:7:30", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": "internal" } ], "src": "4385:9:30" }, "scope": 5981, "src": "4308:227:30", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 5776, "nodeType": "Block", "src": "4922:203:30", "statements": [ { "assignments": [ 5746 ], "declarations": [ { "constant": false, "id": 5746, "mutability": "mutable", "name": "s", "nameLocation": "4940:1:30", "nodeType": "VariableDeclaration", "scope": 5776, "src": "4932:9:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5745, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "4932:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "id": 5753, "initialValue": { "commonType": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "id": 5752, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 5747, "name": "vs", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5737, "src": "4944:2:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "nodeType": "BinaryOperation", "operator": "&", "rightExpression": { "arguments": [ { "hexValue": "307837666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666", "id": 5750, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "4957:66:30", "typeDescriptions": { "typeIdentifier": "t_rational_57896044618658097711785492504343953926634992332820282019728792003956564819967_by_1", "typeString": "int_const 5789...(69 digits omitted)...9967" }, "value": "0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_57896044618658097711785492504343953926634992332820282019728792003956564819967_by_1", "typeString": "int_const 5789...(69 digits omitted)...9967" } ], "id": 5749, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "4949:7:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_bytes32_$", "typeString": "type(bytes32)" }, "typeName": { "id": 5748, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "4949:7:30", "typeDescriptions": {} } }, "id": 5751, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4949:75:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "src": "4944:80:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "nodeType": "VariableDeclarationStatement", "src": "4932:92:30" }, { "assignments": [ 5755 ], "declarations": [ { "constant": false, "id": 5755, "mutability": "mutable", "name": "v", "nameLocation": "5040:1:30", "nodeType": "VariableDeclaration", "scope": 5776, "src": "5034:7:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "typeName": { "id": 5754, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "5034:5:30", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "visibility": "internal" } ], "id": 5768, "initialValue": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 5766, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "components": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 5763, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "arguments": [ { "id": 5760, "name": "vs", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5737, "src": "5059:2:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 5759, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5051:7:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_uint256_$", "typeString": "type(uint256)" }, "typeName": { "id": 5758, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "5051:7:30", "typeDescriptions": {} } }, "id": 5761, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5051:11:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">>", "rightExpression": { "hexValue": "323535", "id": 5762, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5066:3:30", "typeDescriptions": { "typeIdentifier": "t_rational_255_by_1", "typeString": "int_const 255" }, "value": "255" }, "src": "5051:18:30", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "id": 5764, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "5050:20:30", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "hexValue": "3237", "id": 5765, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "5073:2:30", "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "5050:25:30", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "id": 5757, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "5044:5:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_uint8_$", "typeString": "type(uint8)" }, "typeName": { "id": 5756, "name": "uint8", "nodeType": "ElementaryTypeName", "src": "5044:5:30", "typeDescriptions": {} } }, "id": 5767, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5044:32:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "VariableDeclarationStatement", "src": "5034:42:30" }, { "expression": { "arguments": [ { "id": 5770, "name": "hash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5733, "src": "5104:4:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 5771, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5755, "src": "5110:1:30", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, { "id": 5772, "name": "r", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5735, "src": "5113:1:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 5773, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5746, "src": "5116:1:30", "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": 5769, "name": "tryRecover", "nodeType": "Identifier", "overloadedDeclarations": [ 5703, 5777, 5888 ], "referencedDeclaration": 5888, "src": "5093:10:30", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes32_$_t_uint8_$_t_bytes32_$_t_bytes32_$returns$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "function (bytes32,uint8,bytes32,bytes32) pure returns (address,enum ECDSA.RecoverError)" } }, "id": 5774, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5093:25:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "tuple(address,enum ECDSA.RecoverError)" } }, "functionReturnParameters": 5744, "id": 5775, "nodeType": "Return", "src": "5086:32:30" } ] }, "documentation": { "id": 5731, "nodeType": "StructuredDocumentation", "src": "4541:243:30", "text": " @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.\n See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]\n _Available since v4.3._" }, "id": 5777, "implemented": true, "kind": "function", "modifiers": [], "name": "tryRecover", "nameLocation": "4798:10:30", "nodeType": "FunctionDefinition", "parameters": { "id": 5738, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5733, "mutability": "mutable", "name": "hash", "nameLocation": "4826:4:30", "nodeType": "VariableDeclaration", "scope": 5777, "src": "4818:12:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5732, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "4818:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" }, { "constant": false, "id": 5735, "mutability": "mutable", "name": "r", "nameLocation": "4848:1:30", "nodeType": "VariableDeclaration", "scope": 5777, "src": "4840:9:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5734, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "4840:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" }, { "constant": false, "id": 5737, "mutability": "mutable", "name": "vs", "nameLocation": "4867:2:30", "nodeType": "VariableDeclaration", "scope": 5777, "src": "4859:10:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, 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"typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "id": 5794, "name": "tryRecover", "nodeType": "Identifier", "overloadedDeclarations": [ 5703, 5777, 5888 ], "referencedDeclaration": 5777, "src": "5458:10:30", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_bytes32_$_t_bytes32_$_t_bytes32_$returns$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "function (bytes32,bytes32,bytes32) pure returns (address,enum ECDSA.RecoverError)" } }, "id": 5798, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5458:23:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "tuple(address,enum ECDSA.RecoverError)" } }, "nodeType": "VariableDeclarationStatement", "src": "5416:65:30" }, { "expression": { "arguments": [ { "id": 5801, "name": "error", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5793, "src": "5503:5:30", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } ], "id": 5800, "name": "_throwError", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5638, "src": "5491:11:30", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_enum$_RecoverError_$5584_$returns$__$", "typeString": "function (enum ECDSA.RecoverError) pure" } }, "id": 5802, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5491:18:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 5803, "nodeType": "ExpressionStatement", "src": "5491:18:30" }, { "expression": { "id": 5804, "name": "recovered", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5790, "src": "5526:9:30", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "functionReturnParameters": 5788, "id": 5805, "nodeType": "Return", "src": "5519:16:30" } ] }, "documentation": { "id": 5778, "nodeType": "StructuredDocumentation", "src": "5131:154:30", "text": " @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.\n _Available since v4.2._" }, "id": 5807, "implemented": true, "kind": "function", "modifiers": [], "name": "recover", "nameLocation": "5299:7:30", "nodeType": "FunctionDefinition", "parameters": { "id": 5785, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5780, "mutability": "mutable", "name": "hash", "nameLocation": "5324:4:30", "nodeType": "VariableDeclaration", "scope": 5807, "src": "5316:12:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5779, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "5316:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" }, { "constant": false, "id": 5782, "mutability": "mutable", "name": "r", "nameLocation": "5346:1:30", "nodeType": "VariableDeclaration", "scope": 5807, "src": "5338:9:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5781, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "5338:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" }, { "constant": false, "id": 5784, "mutability": "mutable", "name": "vs", "nameLocation": "5365:2:30", "nodeType": "VariableDeclaration", "scope": 5807, "src": "5357:10:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5783, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "5357:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "src": "5306:67:30" }, "returnParameters": { "id": 5788, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5787, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 5807, "src": "5397:7:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5786, "name": "address", "nodeType": "ElementaryTypeName", "src": "5397:7:30", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "visibility": 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"typeString": "type(uint256)" }, "typeName": { "id": 5824, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "6753:7:30", "typeDescriptions": {} } }, "id": 5827, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6753:10:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": ">", "rightExpression": { "hexValue": "307837464646464646464646464646464646464646464646464646464646464646463544353736453733353741343530314444464539324634363638314232304130", "id": 5828, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6766:66:30", "typeDescriptions": { "typeIdentifier": "t_rational_57896044618658097711785492504343953926418782139537452191302581570759080747168_by_1", "typeString": "int_const 5789...(69 digits omitted)...7168" }, "value": "0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0" }, "src": "6753:79:30", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 5839, "nodeType": "IfStatement", "src": "6749:161:30", "trueBody": { "id": 5838, "nodeType": "Block", "src": "6834:76:30", "statements": [ { "expression": { "components": [ { "arguments": [ { "hexValue": "30", "id": 5832, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6864:1:30", "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": 5831, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "6856:7:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": { "id": 5830, "name": "address", "nodeType": "ElementaryTypeName", "src": "6856:7:30", "typeDescriptions": {} } }, "id": 5833, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6856:10:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "expression": { "id": 5834, "name": "RecoverError", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5584, "src": "6868:12:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_enum$_RecoverError_$5584_$", "typeString": "type(enum ECDSA.RecoverError)" } }, "id": 5835, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "InvalidSignatureS", "nodeType": "MemberAccess", "referencedDeclaration": 5582, "src": "6868:30:30", "typeDescriptions": { "typeIdentifier": "t_enum$_RecoverError_$5584", "typeString": "enum ECDSA.RecoverError" } } ], "id": 5836, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "6855:44:30", "typeDescriptions": { "typeIdentifier": "t_tuple$_t_address_$_t_enum$_RecoverError_$5584_$", "typeString": "tuple(address,enum ECDSA.RecoverError)" } }, "functionReturnParameters": 5823, "id": 5837, "nodeType": "Return", "src": "6848:51:30" } ] } }, { "condition": { "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 5846, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 5842, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 5840, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5812, "src": "6923:1:30", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "hexValue": "3237", "id": 5841, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6928:2:30", "typeDescriptions": { "typeIdentifier": "t_rational_27_by_1", "typeString": "int_const 27" }, "value": "27" }, "src": "6923:7:30", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "commonType": { "typeIdentifier": "t_uint8", "typeString": "uint8" }, "id": 5845, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "id": 5843, "name": "v", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5812, "src": "6934:1:30", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "nodeType": "BinaryOperation", "operator": "!=", "rightExpression": { "hexValue": "3238", "id": 5844, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6939:2:30", "typeDescriptions": { "typeIdentifier": "t_rational_28_by_1", "typeString": "int_const 28" }, "value": "28" }, "src": "6934:7:30", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "6923:18:30", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 5856, "nodeType": "IfStatement", "src": "6919:100:30", "trueBody": { "id": 5855, "nodeType": "Block", "src": "6943:76:30", "statements": [ { "expression": { "components": [ { "arguments": [ { "hexValue": "30", "id": 5849, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6973:1:30", "typeDescriptions": { 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This\n produces hash corresponding to the one signed with the\n https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n JSON-RPC method as part of EIP-191.\n See {recover}." }, "id": 5938, "implemented": true, "kind": "function", "modifiers": [], "name": "toEthSignedMessageHash", "nameLocation": "8021:22:30", "nodeType": "FunctionDefinition", "parameters": { "id": 5925, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5924, "mutability": "mutable", "name": "hash", "nameLocation": "8052:4:30", "nodeType": "VariableDeclaration", "scope": 5938, "src": "8044:12:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5923, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "8044:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "src": "8043:14:30" }, "returnParameters": { "id": 5928, 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false, "nodeType": "Literal", "src": "8686:32:30", "typeDescriptions": { "typeIdentifier": "t_stringliteral_9af2d9c228f6cfddaa6d1e5b94e0bce4ab16bd9a472a2b7fbfd74ebff4c720b4", "typeString": "literal_string hex\"19457468657265756d205369676e6564204d6573736167653a0a\"" }, "value": "\u0019Ethereum Signed Message:\n" }, { "arguments": [ { "expression": { "id": 5952, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5941, "src": "8737:1:30", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 5953, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "src": "8737:8:30", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 5950, "name": "Strings", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5574, "src": "8720:7:30", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_Strings_$5574_$", "typeString": "type(library Strings)" } }, "id": 5951, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "toString", "nodeType": "MemberAccess", "referencedDeclaration": 5456, "src": "8720:16:30", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$returns$_t_string_memory_ptr_$", "typeString": "function (uint256) pure returns (string memory)" } }, "id": 5954, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8720:26:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, { "id": 5955, "name": "s", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5941, "src": "8748:1:30", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_stringliteral_9af2d9c228f6cfddaa6d1e5b94e0bce4ab16bd9a472a2b7fbfd74ebff4c720b4", "typeString": "literal_string hex\"19457468657265756d205369676e6564204d6573736167653a0a\"" }, { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "expression": { "id": 5947, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "8669:3:30", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 5948, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodePacked", "nodeType": "MemberAccess", "src": "8669:16:30", "typeDescriptions": { "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 5956, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8669:81:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 5946, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967288, "src": "8659:9:30", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 5957, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "8659:92:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "functionReturnParameters": 5945, "id": 5958, "nodeType": "Return", "src": "8652:99:30" } ] }, "documentation": { "id": 5939, "nodeType": "StructuredDocumentation", "src": "8283:274:30", "text": " @dev Returns an Ethereum Signed Message, created from `s`. This\n produces hash corresponding to the one signed with the\n https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n JSON-RPC method as part of EIP-191.\n See {recover}." }, "id": 5960, "implemented": true, "kind": "function", "modifiers": [], "name": "toEthSignedMessageHash", "nameLocation": "8571:22:30", "nodeType": "FunctionDefinition", "parameters": { "id": 5942, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5941, "mutability": "mutable", "name": "s", "nameLocation": "8607:1:30", "nodeType": "VariableDeclaration", "scope": 5960, "src": "8594:14:30", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 5940, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "8594:5:30", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "visibility": "internal" } ], "src": "8593:16:30" }, "returnParameters": { "id": 5945, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5944, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 5960, "src": "8633:7:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5943, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "8633:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "src": "8632:9:30" }, "scope": 5981, "src": "8562:196:30", "stateMutability": "pure", "virtual": false, "visibility": "internal" }, { "body": { "id": 5979, "nodeType": "Block", "src": "9199:92:30", "statements": [ { "expression": { "arguments": [ { "arguments": [ { "hexValue": "1901", "id": 5973, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "9243:10:30", "typeDescriptions": { "typeIdentifier": "t_stringliteral_301a50b291d33ce1e8e9064e3f6a6c51d902ec22892b50d58abf6357c6a45541", "typeString": "literal_string hex\"1901\"" }, "value": "\u0019\u0001" }, { "id": 5974, "name": "domainSeparator", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5963, "src": "9255:15:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, { "id": 5975, "name": "structHash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5965, "src": "9272:10:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_stringliteral_301a50b291d33ce1e8e9064e3f6a6c51d902ec22892b50d58abf6357c6a45541", "typeString": "literal_string hex\"1901\"" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } ], "expression": { "id": 5971, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967295, "src": "9226:3:30", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 5972, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodePacked", "nodeType": "MemberAccess", "src": "9226:16:30", "typeDescriptions": { "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 5976, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9226:57:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 5970, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 4294967288, "src": "9216:9:30", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 5977, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "9216:68:30", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "functionReturnParameters": 5969, "id": 5978, "nodeType": "Return", "src": "9209:75:30" } ] }, "documentation": { "id": 5961, "nodeType": "StructuredDocumentation", "src": "8764:328:30", "text": " @dev Returns an Ethereum Signed Typed Data, created from a\n `domainSeparator` and a `structHash`. This produces hash corresponding\n to the one signed with the\n https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]\n JSON-RPC method as part of EIP-712.\n See {recover}." }, "id": 5980, "implemented": true, "kind": "function", "modifiers": [], "name": "toTypedDataHash", "nameLocation": "9106:15:30", "nodeType": "FunctionDefinition", "parameters": { "id": 5966, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5963, "mutability": "mutable", "name": "domainSeparator", "nameLocation": "9130:15:30", "nodeType": "VariableDeclaration", "scope": 5980, "src": "9122:23:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5962, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "9122:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" }, { "constant": false, "id": 5965, "mutability": "mutable", "name": "structHash", "nameLocation": "9155:10:30", "nodeType": "VariableDeclaration", "scope": 5980, "src": "9147:18:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5964, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "9147:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "src": "9121:45:30" }, "returnParameters": { "id": 5969, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5968, "mutability": "mutable", "name": "", "nameLocation": "-1:-1:-1", "nodeType": "VariableDeclaration", "scope": 5980, "src": "9190:7:30", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5967, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "9190:7:30", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "src": "9189:9:30" }, "scope": 5981, "src": "9097:194:30", "stateMutability": "pure", "virtual": false, "visibility": "internal" } ], "scope": 5982, "src": "369:8924:30", "usedErrors": [] } ], "src": "112:9182:30" }, "compiler": { "name": "solc", "version": "0.8.11+commit.d7f03943.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.4.4", "updatedAt": "2022-03-06T23:47:11.061Z", "devdoc": { "details": "Elliptic Curve Digital Signature Algorithm (ECDSA) operations. These functions can be used to verify that a message was signed by the holder of the private keys of a given address.", "kind": "dev", "methods": {}, "version": 1 }, "userdoc": { "kind": "user", "methods": {}, "version": 1 } }