{ "contractName": "ERC165", "abi": [ { "inputs": [], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }, { "constant": true, "inputs": [ { "name": "interfaceId", "type": "bytes4" } ], "name": "supportsInterface", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" } ], "metadata": "", "bytecode": "0x", "deployedBytecode": "0x", "sourceMap": "", "deployedSourceMap": "", "source": "pragma solidity ^0.5.2;\n\nimport \"./IERC165.sol\";\n\n/**\n * @title ERC165\n * @author Matt Condon (@shrugs)\n * @dev Implements ERC165 using a lookup table.\n */\ncontract ERC165 is IERC165 {\n bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;\n /*\n * 0x01ffc9a7 ===\n * bytes4(keccak256('supportsInterface(bytes4)'))\n */\n\n /**\n * @dev a mapping of interface id to whether or not it's supported\n */\n mapping(bytes4 => bool) private _supportedInterfaces;\n\n /**\n * @dev A contract implementing SupportsInterfaceWithLookup\n * implement ERC165 itself\n */\n constructor () internal {\n _registerInterface(_INTERFACE_ID_ERC165);\n }\n\n /**\n * @dev implement supportsInterface(bytes4) using a lookup table\n */\n function supportsInterface(bytes4 interfaceId) external view returns (bool) {\n return _supportedInterfaces[interfaceId];\n }\n\n /**\n * @dev internal method for registering an interface\n */\n function _registerInterface(bytes4 interfaceId) internal {\n require(interfaceId != 0xffffffff);\n _supportedInterfaces[interfaceId] = true;\n }\n}\n", "sourcePath": "openzeppelin-solidity/contracts/introspection/ERC165.sol", "ast": { "absolutePath": "openzeppelin-solidity/contracts/introspection/ERC165.sol", "exportedSymbols": { "ERC165": [ 370 ] }, "id": 371, "nodeType": "SourceUnit", "nodes": [ { "id": 321, "literals": [ "solidity", "^", "0.5", ".2" ], "nodeType": "PragmaDirective", "src": "0:23:5" }, { "absolutePath": 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"default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 352, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "1017:6:5", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": null, "visibility": "internal" } ], "src": "1016:20:5" }, "returnParameters": { "id": 355, "nodeType": "ParameterList", "parameters": [], "src": "1046:0:5" }, "scope": 370, "src": "989:158:5", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" } ], "scope": 371, "src": "156:993:5" } ], "src": "0:1150:5" }, "compiler": { "name": "solc", "version": "0.5.2+commit.1df8f40c.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.0.16", "updatedAt": "2019-10-19T07:38:02.311Z", "devdoc": { "author": "Matt Condon (@shrugs)", "details": "Implements ERC165 using a lookup table.", "methods": { "constructor": { "details": "A contract implementing SupportsInterfaceWithLookup implement ERC165 itself" }, "supportsInterface(bytes4)": { "details": "implement supportsInterface(bytes4) using a lookup table" } }, "title": "ERC165" }, "userdoc": { "methods": {} } }