{ "fileName": "ERC165Checker.sol", "contractName": "ERC165Checker", "source": "pragma solidity ^0.6.2;\n\n/**\n * @dev Library used to query support of an interface declared via {IERC165}.\n *\n * Note that these functions return the actual result of the query: they do not\n * `revert` if an interface is not supported. It is up to the caller to decide\n * what to do in these cases.\n */\nlibrary ERC165Checker {\n // As per the EIP-165 spec, no interface should ever match 0xffffffff\n bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;\n\n /*\n * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7\n */\n bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;\n\n /**\n * @dev Returns true if `account` supports the {IERC165} interface,\n */\n function supportsERC165(address account) internal view returns (bool) {\n // Any contract that implements ERC165 must explicitly indicate support of\n // InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid\n return _supportsERC165Interface(account, _INTERFACE_ID_ERC165) &&\n !_supportsERC165Interface(account, _INTERFACE_ID_INVALID);\n }\n\n /**\n * @dev Returns true if `account` supports the interface defined by\n * `interfaceId`. Support for {IERC165} itself is queried automatically.\n *\n * See {IERC165-supportsInterface}.\n */\n function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) {\n // query support of both ERC165 as per the spec and support of _interfaceId\n return supportsERC165(account) &&\n _supportsERC165Interface(account, interfaceId);\n }\n\n /**\n * @dev Returns true if `account` supports all the interfaces defined in\n * `interfaceIds`. Support for {IERC165} itself is queried automatically.\n *\n * Batch-querying can lead to gas savings by skipping repeated checks for\n * {IERC165} support.\n *\n * See {IERC165-supportsInterface}.\n */\n function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) {\n // query support of ERC165 itself\n if (!supportsERC165(account)) {\n return false;\n }\n\n // query support of each interface in _interfaceIds\n for (uint256 i = 0; i < interfaceIds.length; i++) {\n if (!_supportsERC165Interface(account, interfaceIds[i])) {\n return false;\n }\n }\n\n // all interfaces supported\n return true;\n }\n\n /**\n * @notice Query if a contract implements an interface, does not check ERC165 support\n * @param account The address of the contract to query for support of an interface\n * @param interfaceId The interface identifier, as specified in ERC-165\n * @return true if the contract at account indicates support of the interface with\n * identifier interfaceId, false otherwise\n * @dev Assumes that account contains a contract that supports ERC165, otherwise\n * the behavior of this method is undefined. This precondition can be checked\n * with {supportsERC165}.\n * Interface identification is specified in ERC-165.\n */\n function _supportsERC165Interface(address account, bytes4 interfaceId) private view returns (bool) {\n // success determines whether the staticcall succeeded and result determines\n // whether the contract at account indicates support of _interfaceId\n (bool success, bool result) = _callERC165SupportsInterface(account, interfaceId);\n\n return (success && result);\n }\n\n /**\n * @notice Calls the function with selector 0x01ffc9a7 (ERC165) and suppresses throw\n * @param account The address of the contract to query for support of an interface\n * @param interfaceId The interface identifier, as specified in ERC-165\n * @return success true if the STATICCALL succeeded, false otherwise\n * @return result true if the STATICCALL succeeded and the contract at account\n * indicates support of the interface with identifier interfaceId, false otherwise\n */\n function _callERC165SupportsInterface(address account, bytes4 interfaceId)\n private\n view\n returns (bool, bool)\n {\n bytes memory encodedParams = abi.encodeWithSelector(_INTERFACE_ID_ERC165, interfaceId);\n (bool success, bytes memory result) = account.staticcall{ gas: 30000 }(encodedParams);\n if (result.length < 32) return (false, false);\n return (success, abi.decode(result, (bool)));\n }\n}\n", "sourcePath": "contracts/introspection/ERC165Checker.sol", "sourceMap": "303:4192:13:-:0;;132:2:-1;166:7;155:9;146:7;137:37;255:7;249:14;246:1;241:23;235:4;232:33;222:2;;269:9;222:2;293:9;290:1;283:20;323:4;314:7;306:22;347:7;338;331:24", "deployedSourceMap": "303:4192:13:-:0;;;;;;12:1:-1;9;2:12", "abi": [], "ast": { "absolutePath": "contracts/introspection/ERC165Checker.sol", "exportedSymbols": { "ERC165Checker": [ 2683 ] }, "id": 2684, "nodeType": "SourceUnit", "nodes": [ { "id": 2513, "literals": [ "solidity", "^", "0.6", ".2" ], "nodeType": "PragmaDirective", "src": "0:23:13" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": { "id": 2514, "nodeType": "StructuredDocumentation", "src": "25:277:13", "text": "@dev Library used to query support of an interface declared via {IERC165}.\n * Note that these functions return the actual result of the query: they do not\n`revert` if an interface is not supported. It is up to the caller to decide\nwhat to do in these cases." }, "fullyImplemented": true, "id": 2683, "linearizedBaseContracts": [ 2683 ], "name": "ERC165Checker", "nodeType": "ContractDefinition", "nodes": [ { "constant": true, "id": 2517, "mutability": "constant", "name": "_INTERFACE_ID_INVALID", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2683, "src": "405:58:13", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 2515, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "405:6:13", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": { "argumentTypes": null, "hexValue": "30786666666666666666", "id": 2516, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "453:10:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_4294967295_by_1", "typeString": "int_const 4294967295" }, "value": "0xffffffff" }, "visibility": "private" }, { "constant": true, "id": 2520, "mutability": "constant", "name": "_INTERFACE_ID_ERC165", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2683, "src": "553:57:13", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 2518, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "553:6:13", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": { "argumentTypes": null, "hexValue": "30783031666663396137", "id": 2519, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "600:10:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_33540519_by_1", "typeString": "int_const 33540519" }, "value": "0x01ffc9a7" }, 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"Literal", "src": "2251:1:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "nodeType": "VariableDeclarationStatement", "src": "2239:13:13" }, "loopExpression": { "expression": { "argumentTypes": null, "id": 2588, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "++", "prefix": false, "src": "2279:3:13", "subExpression": { "argumentTypes": null, "id": 2587, "name": "i", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2580, "src": "2279:1:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2589, "nodeType": "ExpressionStatement", "src": "2279:3:13" }, "nodeType": "ForStatement", "src": "2234:176:13" }, { "expression": { "argumentTypes": null, "hexValue": "74727565", "id": 2603, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "2463:4:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 2570, "id": 2604, "nodeType": "Return", "src": "2456:11:13" } ] }, "documentation": { "id": 2561, "nodeType": "StructuredDocumentation", "src": "1609:324:13", "text": "@dev Returns true if `account` supports all the interfaces defined in\n`interfaceIds`. Support for {IERC165} itself is queried automatically.\n * Batch-querying can lead to gas savings by skipping repeated checks for\n{IERC165} support.\n * See {IERC165-supportsInterface}." }, "id": 2606, "implemented": true, "kind": "function", "modifiers": [], "name": "supportsAllInterfaces", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 2567, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2563, "mutability": "mutable", "name": "account", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2606, "src": "1969:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2562, "name": "address", "nodeType": "ElementaryTypeName", "src": "1969:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2566, "mutability": "mutable", "name": "interfaceIds", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2606, "src": "1986:28:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_array$_t_bytes4_$dyn_memory_ptr", "typeString": "bytes4[]" }, "typeName": { "baseType": { "id": 2564, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "1986:6:13", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "id": 2565, "length": null, "nodeType": "ArrayTypeName", "src": "1986:8:13", "typeDescriptions": { "typeIdentifier": "t_array$_t_bytes4_$dyn_storage_ptr", "typeString": "bytes4[]" } }, "value": null, "visibility": "internal" } ], "src": "1968:47:13" }, "returnParameters": { "id": 2570, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2569, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2606, "src": "2039:4:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2568, "name": "bool", "nodeType": "ElementaryTypeName", "src": "2039:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "2038:6:13" }, "scope": 2683, "src": "1938:536:13", "stateMutability": "view", "virtual": false, "visibility": "internal" }, { "body": { "id": 2630, "nodeType": "Block", "src": "3236:296:13", "statements": [ { "assignments": [ 2617, 2619 ], "declarations": [ { "constant": false, "id": 2617, "mutability": "mutable", "name": "success", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2630, "src": "3409:12:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2616, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3409:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2619, "mutability": "mutable", "name": "result", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2630, "src": "3423:11:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2618, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3423:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "id": 2624, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2621, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2609, "src": "3467:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "id": 2622, "name": "interfaceId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2611, "src": "3476:11:13", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } ], "id": 2620, "name": "_callERC165SupportsInterface", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2682, "src": "3438:28:13", "typeDescriptions": { "typeIdentifier": "t_function_internal_view$_t_address_$_t_bytes4_$returns$_t_bool_$_t_bool_$", "typeString": "function (address,bytes4) view returns (bool,bool)" } }, "id": 2623, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3438:50:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$_t_bool_$_t_bool_$", "typeString": "tuple(bool,bool)" } }, "nodeType": "VariableDeclarationStatement", "src": "3408:80:13" }, { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_bool", "typeString": "bool" }, "id": 2627, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 2625, "name": "success", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2617, "src": "3507:7:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "BinaryOperation", "operator": "&&", "rightExpression": { "argumentTypes": null, "id": 2626, "name": "result", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2619, "src": "3518:6:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "src": "3507:17:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 2628, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "3506:19:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "functionReturnParameters": 2615, "id": 2629, "nodeType": "Return", "src": "3499:26:13" } ] }, "documentation": { "id": 2607, "nodeType": "StructuredDocumentation", "src": "2480:652:13", "text": "@notice Query if a contract implements an interface, does not check ERC165 support\n@param account The address of the contract to query for support of an interface\n@param interfaceId The interface identifier, as specified in ERC-165\n@return true if the contract at account indicates support of the interface with\nidentifier interfaceId, false otherwise\n@dev Assumes that account contains a contract that supports ERC165, otherwise\nthe behavior of this method is undefined. This precondition can be checked\nwith {supportsERC165}.\nInterface identification is specified in ERC-165." }, "id": 2631, "implemented": true, "kind": "function", "modifiers": [], "name": "_supportsERC165Interface", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 2612, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2609, "mutability": "mutable", "name": "account", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2631, "src": "3171:15:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2608, "name": "address", "nodeType": "ElementaryTypeName", "src": "3171:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2611, "mutability": "mutable", "name": "interfaceId", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2631, "src": "3188:18:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 2610, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "3188:6:13", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": null, "visibility": "internal" } ], "src": "3170:37:13" }, "returnParameters": { "id": 2615, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2614, "mutability": "mutable", "name": "", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2631, "src": "3230:4:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2613, "name": "bool", "nodeType": "ElementaryTypeName", "src": "3230:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" } ], "src": "3229:6:13" }, "scope": 2683, "src": "3137:395:13", "stateMutability": "view", "virtual": false, "visibility": "private" }, { "body": { "id": 2681, "nodeType": "Block", "src": "4186:307:13", "statements": [ { "assignments": [ 2644 ], "declarations": [ { "constant": false, "id": 2644, "mutability": "mutable", "name": "encodedParams", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2681, "src": "4196:26:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 2643, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "4196:5:13", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "id": 2650, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2647, "name": "_INTERFACE_ID_ERC165", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2520, "src": "4248:20:13", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, { "argumentTypes": null, "id": 2648, "name": "interfaceId", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2636, "src": "4270:11:13", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } ], "expression": { "argumentTypes": null, "id": 2645, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "4225:3:13", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 2646, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "encodeWithSelector", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4225:22:13", "typeDescriptions": { "typeIdentifier": "t_function_abiencodewithselector_pure$_t_bytes4_$returns$_t_bytes_memory_ptr_$", "typeString": "function (bytes4) pure returns (bytes memory)" } }, "id": 2649, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4225:57:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "nodeType": "VariableDeclarationStatement", "src": "4196:86:13" }, { "assignments": [ 2652, 2654 ], "declarations": [ { "constant": false, "id": 2652, "mutability": "mutable", "name": "success", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2681, "src": "4293:12:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 2651, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4293:4:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2654, "mutability": "mutable", "name": "result", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2681, "src": "4307:19:13", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes" }, "typeName": { "id": 2653, "name": "bytes", "nodeType": "ElementaryTypeName", "src": "4307:5:13", "typeDescriptions": { "typeIdentifier": "t_bytes_storage_ptr", "typeString": "bytes" } }, "value": null, "visibility": "internal" } ], "id": 2661, "initialValue": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2659, "name": "encodedParams", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2644, "src": "4363:13:13", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } ], "expression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 2655, "name": "account", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2634, "src": "4330:7:13", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 2656, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "staticcall", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4330:18:13", "typeDescriptions": { "typeIdentifier": "t_function_barestaticcall_view$_t_bytes_memory_ptr_$returns$_t_bool_$_t_bytes_memory_ptr_$", "typeString": "function (bytes memory) view returns (bool,bytes memory)" } }, "id": 2658, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "names": [ "gas" ], "nodeType": "FunctionCallOptions", "options": [ { "argumentTypes": null, "hexValue": "3330303030", "id": 2657, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "4355:5:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_30000_by_1", "typeString": "int_const 30000" }, "value": "30000" } ], "src": "4330:32:13", "typeDescriptions": { "typeIdentifier": "t_function_barestaticcall_view$_t_bytes_memory_ptr_$returns$_t_bool_$_t_bytes_memory_ptr_$gas", "typeString": "function (bytes memory) view returns (bool,bytes memory)" } }, "id": 2660, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4330:47:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$_t_bool_$_t_bytes_memory_ptr_$", "typeString": "tuple(bool,bytes memory)" } }, "nodeType": "VariableDeclarationStatement", "src": "4292:85:13" }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2665, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 2662, "name": "result", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2654, "src": "4391:6:13", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, "id": 2663, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4391:13:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "<", "rightExpression": { "argumentTypes": null, "hexValue": "3332", "id": 2664, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "4407:2:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_32_by_1", "typeString": "int_const 32" }, "value": "32" }, "src": "4391:18:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 2670, "nodeType": "IfStatement", "src": "4387:45:13", "trueBody": { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "hexValue": "66616c7365", "id": 2666, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "4419:5:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "false" }, { "argumentTypes": null, "hexValue": "66616c7365", "id": 2667, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "4426:5:13", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "false" } ], "id": 2668, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "4418:14:13", "typeDescriptions": { "typeIdentifier": "t_tuple$_t_bool_$_t_bool_$", "typeString": "tuple(bool,bool)" } }, "functionReturnParameters": 2642, "id": 2669, "nodeType": "Return", "src": "4411:21:13" } }, { "expression": { "argumentTypes": null, "components": [ { "argumentTypes": null, "id": 2671, "name": "success", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2652, "src": "4450:7:13", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2674, "name": "result", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2654, "src": "4470:6:13", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "argumentTypes": null, "components": [ { "argumentTypes": null, "id": 2676, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "4479:4:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_bool_$", "typeString": "type(bool)" }, "typeName": { "id": 2675, "name": "bool", "nodeType": "ElementaryTypeName", "src": "4479:4:13", "typeDescriptions": { "typeIdentifier": null, "typeString": null } } } ], "id": 2677, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "TupleExpression", "src": "4478:6:13", "typeDescriptions": { "typeIdentifier": "t_type$_t_bool_$", "typeString": "type(bool)" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_type$_t_bool_$", "typeString": "type(bool)" } ], "expression": { "argumentTypes": null, "id": 2672, "name": "abi", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": -1, "src": "4459:3:13", "typeDescriptions": { "typeIdentifier": "t_magic_abi", "typeString": "abi" } }, "id": 2673, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "decode", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "4459:10:13", "typeDescriptions": { "typeIdentifier": "t_function_abidecode_pure$__$returns$__$", "typeString": "function () pure" } }, "id": 2678, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "4459:26:13", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } ], "id": 2679, "isConstant": false, "isInlineArray": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "TupleExpression", "src": "4449:37:13", "typeDescriptions": { "typeIdentifier": "t_tuple$_t_bool_$_t_bool_$", "typeString": "tuple(bool,bool)" } }, "functionReturnParameters": 2642, "id": 2680, "nodeType": "Return", "src": "4442:44:13" } ] }, "documentation": { "id": 2632, "nodeType": "StructuredDocumentation", "src": "3538:506:13", "text": "@notice Calls the function with selector 0x01ffc9a7 (ERC165) and suppresses throw\n@param account The address of the contract to query for support of an interface\n@param interfaceId The interface identifier, as specified in ERC-165\n@return success true if the STATICCALL succeeded, false otherwise\n@return result true if the STATICCALL succeeded and the contract at account\nindicates support of the interface with identifier interfaceId, false otherwise" }, "id": 2682, "implemented": true, "kind": "function", "modifiers": [], "name": "_callERC165SupportsInterface", "nodeType": 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