{ "fileName": "ERC1820Implementer.sol", "contractName": "ERC1820Implementer", "source": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.7.0;\n\nimport \"./IERC1820Implementer.sol\";\n\n/**\n * @dev Implementation of the {IERC1820Implementer} interface.\n *\n * Contracts may inherit from this and call {_registerInterfaceForAddress} to\n * declare their willingness to be implementers.\n * {IERC1820Registry-setInterfaceImplementer} should then be called for the\n * registration to be complete.\n */\ncontract ERC1820Implementer is IERC1820Implementer {\n bytes32 constant private _ERC1820_ACCEPT_MAGIC = keccak256(abi.encodePacked(\"ERC1820_ACCEPT_MAGIC\"));\n\n mapping(bytes32 => mapping(address => bool)) private _supportedInterfaces;\n\n /**\n * See {IERC1820Implementer-canImplementInterfaceForAddress}.\n */\n function canImplementInterfaceForAddress(bytes32 interfaceHash, address account) public view override returns (bytes32) {\n return _supportedInterfaces[interfaceHash][account] ? _ERC1820_ACCEPT_MAGIC : bytes32(0x00);\n }\n\n /**\n * @dev Declares the contract as willing to be an implementer of\n * `interfaceHash` for `account`.\n *\n * See {IERC1820Registry-setInterfaceImplementer} and\n * {IERC1820Registry-interfaceHash}.\n */\n function _registerInterfaceForAddress(bytes32 interfaceHash, address account) internal virtual {\n _supportedInterfaces[interfaceHash][account] = true;\n }\n}\n", "sourcePath": "contracts/introspection/ERC1820Implementer.sol", "sourceMap": "404:954:12:-:0;;;;;;;;;;;;;;;;;;;", "deployedSourceMap": "404:954:12:-:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;730:228;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;:::i;:::-;;;;;;;;;;;;;;;;;;;;841:7;867:20;:35;888:13;867:35;;;;;;;;;;;:44;903:7;867:44;;;;;;;;;;;;;;;;;;;;;;;;;:84;;946:4;938:13;;867:84;;;520:40;;;;;;;;;;;;;;;;;;;;;;;;;;510:51;;;;;;867:84;860:91;;730:228;;;;:::o", "abi": [ { "inputs": [ { "internalType": "bytes32", "name": "interfaceHash", "type": "bytes32" }, { "internalType": "address", "name": "account", "type": "address" } ], "name": "canImplementInterfaceForAddress", "outputs": [ { "internalType": "bytes32", "name": "", "type": "bytes32" } ], "stateMutability": "view", "type": "function" } ], "ast": { "absolutePath": "contracts/introspection/ERC1820Implementer.sol", "exportedSymbols": { "ERC1820Implementer": [ 2036 ] }, "id": 2037, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 1976, "literals": [ "solidity", "^", "0.7", ".0" ], "nodeType": "PragmaDirective", "src": "33:23:12" }, { "absolutePath": "contracts/introspection/IERC1820Implementer.sol", "file": "./IERC1820Implementer.sol", "id": 1977, "nodeType": "ImportDirective", "scope": 2037, "sourceUnit": 2063, "src": "58:35:12", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 1979, "name": "IERC1820Implementer", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 2062, "src": "435:19:12", "typeDescriptions": { "typeIdentifier": "t_contract$_IERC1820Implementer_$2062", "typeString": "contract IERC1820Implementer" } }, "id": 1980, "nodeType": "InheritanceSpecifier", "src": "435:19:12" } ], "contractDependencies": [ 2062 ], "contractKind": "contract", "documentation": { "id": 1978, "nodeType": "StructuredDocumentation", "src": "95:308:12", "text": " @dev Implementation of the {IERC1820Implementer} interface.\n Contracts may inherit from this and call {_registerInterfaceForAddress} to\n declare their willingness to be implementers.\n {IERC1820Registry-setInterfaceImplementer} should then be called for the\n registration to be complete." }, "fullyImplemented": true, "id": 2036, "linearizedBaseContracts": [ 2036, 2062 ], "name": "ERC1820Implementer", "nodeType": "ContractDefinition", "nodes": [ { "constant": true, "id": 1988, "mutability": "constant", "name": "_ERC1820_ACCEPT_MAGIC", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2036, "src": "461:100:12", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 1981, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "461:7:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "455243313832305f4143434550545f4d41474943", "id": 1985, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "537:22:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_a2ef4600d742022d532d4747cb3547474667d6f13804902513b2ec01c848f4b4", "typeString": "literal_string \"ERC1820_ACCEPT_MAGIC\"" }, "value": "ERC1820_ACCEPT_MAGIC" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_stringliteral_a2ef4600d742022d532d4747cb3547474667d6f13804902513b2ec01c848f4b4", "typeString": "literal_string \"ERC1820_ACCEPT_MAGIC\"" } ], "expression": { "argumentTypes": null, "id": 1983, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "520:3:12", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 1984, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodePacked", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "520:16:12", "typeDescriptions": { "typeIdentifier": "t_function_abiencodepacked_pure$__$returns$_t_bytes_memory_ptr_$", "typeString": "function () pure returns (bytes memory)" } }, "id": 1986, "isConstant": false, "isLValue": false, "isPure": true, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "520:40:12", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "id": 1982, "name": "keccak256", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -8, "src": "510:9:12", "typeDescriptions": { "typeIdentifier": "t_function_keccak256_pure$_t_bytes_memory_ptr_$returns$_t_bytes32_$", "typeString": "function (bytes memory) pure returns (bytes32)" } }, "id": 1987, "isConstant": false, "isLValue": false, "isPure": true, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "510:51:12", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "private" }, { "constant": false, "id": 1994, "mutability": "mutable", "name": "_supportedInterfaces", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2036, "src": "568:73:12", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_bytes32_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(bytes32 => mapping(address => bool))" }, "typeName": { "id": 1993, "keyType": { "id": 1989, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "576:7:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "nodeType": "Mapping", "src": "568:44:12", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_bytes32_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(bytes32 => mapping(address => bool))" }, "valueType": { "id": 1992, "keyType": { "id": 1990, "name": "address", "nodeType": "ElementaryTypeName", "src": "595:7:12", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "587:24:12", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" }, "valueType": { "id": 1991, "name": "bool", "nodeType": "ElementaryTypeName", "src": "606:4:12", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } } }, "value": null, "visibility": "private" }, { "baseFunctions": [ 2061 ], "body": { "id": 2017, "nodeType": "Block", "src": "850:108:12", "statements": [ { "expression": { "argumentTypes": null, "condition": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2005, "name": "_supportedInterfaces", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1994, "src": "867:20:12", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_bytes32_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(bytes32 => mapping(address => bool))" } }, "id": 2007, "indexExpression": { "argumentTypes": null, "id": 2006, "name": "interfaceHash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1997, "src": "888:13:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "867:35:12", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" } }, "id": 2009, "indexExpression": { "argumentTypes": null, "id": 2008, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1999, "src": "903:7:12", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "867:44:12", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseExpression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30783030", "id": 2013, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "946:4:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0x00" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 2012, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "938:7:12", "typeDescriptions": { "typeIdentifier": "t_type$_t_bytes32_$", "typeString": "type(bytes32)" }, "typeName": { "id": 2011, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "938:7:12", "typeDescriptions": { "typeIdentifier": null, "typeString": null } } }, "id": 2014, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "938:13:12", "tryCall": false, "typeDescriptions": { "typeIdentifier": 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1998, "name": "address", "nodeType": "ElementaryTypeName", "src": "794:7:12", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "770:40:12" }, "returnParameters": { "id": 2004, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2003, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2018, "src": "841:7:12", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 2002, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "841:7:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "src": "840:9:12" }, "scope": 2036, "src": "730:228:12", "stateMutability": "view", "virtual": false, "visibility": "public" }, { "body": { "id": 2034, "nodeType": "Block", "src": "1288:68:12", "statements": [ { "expression": { "argumentTypes": null, "id": 2032, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2026, "name": "_supportedInterfaces", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1994, "src": "1298:20:12", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_bytes32_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(bytes32 => mapping(address => bool))" } }, "id": 2029, "indexExpression": { "argumentTypes": null, "id": 2027, "name": "interfaceHash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2021, "src": "1319:13:12", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "1298:35:12", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" } }, "id": 2030, "indexExpression": { "argumentTypes": null, "id": 2028, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2023, "src": "1334:7:12", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": true, "nodeType": "IndexAccess", "src": "1298:44:12", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "hexValue": "74727565", "id": 2031, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "1345:4:12", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "src": "1298:51:12", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 2033, "nodeType": "ExpressionStatement", "src": "1298:51:12" } ] }, "documentation": { "id": 2019, "nodeType": "StructuredDocumentation", "src": "964:224:12", "text": " @dev Declares the contract as willing to be an implementer of\n `interfaceHash` for `account`.\n See {IERC1820Registry-setInterfaceImplementer} and\n {IERC1820Registry-interfaceHash}." }, "id": 2035, "implemented": true, "kind": "function", "modifiers": [], "name": "_registerInterfaceForAddress", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 2024, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2021, "mutability": "mutable", "name": "interfaceHash", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2035, "src": "1231:21:12", "stateVariable": false, "storageLocation": "default", 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