{ "fileName": "ImplementationDirectory.sol", "contractName": "ImplementationDirectory", "source": "pragma solidity ^0.5.0;\n\nimport \"./ImplementationProvider.sol\";\nimport \"../ownership/Ownable.sol\";\nimport '../utils/Address.sol';\n\n/**\n * @title ImplementationDirectory\n * @dev Implementation provider that stores contract implementations in a mapping.\n */\ncontract ImplementationDirectory is ImplementationProvider, OpenZeppelinUpgradesOwnable {\n /**\n * @dev Emitted when the implementation of a contract is changed.\n * @param contractName Name of the contract.\n * @param implementation Address of the added implementation.\n */\n event ImplementationChanged(string contractName, address indexed implementation);\n\n /**\n * @dev Emitted when the implementation directory is frozen.\n */\n event Frozen();\n\n /// @dev Mapping where the addresses of the implementations are stored.\n mapping (string => address) internal implementations;\n\n /// @dev Mutability state of the directory.\n bool public frozen;\n\n /**\n * @dev Modifier that allows functions to be called only before the contract is frozen.\n */\n modifier whenNotFrozen() {\n require(!frozen, \"Cannot perform action for a frozen implementation directory\");\n _;\n }\n\n /**\n * @dev Makes the directory irreversibly immutable.\n * It can only be called once, by the owner.\n */\n function freeze() onlyOwner whenNotFrozen public {\n frozen = true;\n emit Frozen();\n }\n\n /**\n * @dev Returns the implementation address of a contract.\n * @param contractName Name of the contract.\n * @return Address of the implementation.\n */\n function getImplementation(string memory contractName) public view returns (address) {\n return implementations[contractName];\n }\n\n /**\n * @dev Sets the address of the implementation of a contract in the directory.\n * @param contractName Name of the contract.\n * @param implementation Address of the implementation.\n */\n function setImplementation(string memory contractName, address implementation) public onlyOwner whenNotFrozen {\n require(OpenZeppelinUpgradesAddress.isContract(implementation), \"Cannot set implementation in directory with a non-contract address\");\n implementations[contractName] = implementation;\n emit ImplementationChanged(contractName, implementation);\n }\n\n /**\n * @dev Removes the address of a contract implementation from the directory.\n * @param contractName Name of the contract.\n */\n function unsetImplementation(string memory contractName) public onlyOwner whenNotFrozen {\n implementations[contractName] = address(0);\n emit ImplementationChanged(contractName, address(0));\n }\n}\n", "sourcePath": "contracts/application/ImplementationDirectory.sol", "sourceMap": "256:2307:2:-;;;989:10:33;980:6;;:19;;;;;;;;;;;;;;;;;;1047:6;;;;;;;;;;;1014:40;;1043:1;1014:40;;;;;;;;;;;;256:2307:2;;;;;;", "deployedSourceMap": 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"abi": [ { "constant": true, "inputs": [], "name": "frozen", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "contractName", "type": "string" }, { "name": "implementation", "type": "address" } ], "name": "setImplementation", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "contractName", "type": "string" } ], "name": "unsetImplementation", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [], "name": "freeze", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "name": "contractName", "type": "string" } ], "name": "getImplementation", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [], "name": "renounceOwnership", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "owner", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "isOwner", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "newOwner", "type": "address" } ], "name": "transferOwnership", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "contractName", "type": "string" }, { "indexed": true, "name": "implementation", "type": "address" } ], "name": "ImplementationChanged", "type": "event" }, { "anonymous": false, "inputs": [], "name": "Frozen", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "previousOwner", "type": "address" }, { "indexed": true, "name": "newOwner", "type": "address" } ], "name": "OwnershipTransferred", "type": "event" } ], "ast": { "absolutePath": "contracts/application/ImplementationDirectory.sol", "exportedSymbols": { "ImplementationDirectory": [ 442 ] }, "id": 443, "nodeType": "SourceUnit", "nodes": [ { "id": 327, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:2" }, { "absolutePath": "contracts/application/ImplementationProvider.sol", "file": "./ImplementationProvider.sol", "id": 328, "nodeType": "ImportDirective", "scope": 443, "sourceUnit": 453, "src": "25:38:2", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "contracts/ownership/Ownable.sol", "file": "../ownership/Ownable.sol", "id": 329, "nodeType": "ImportDirective", "scope": 443, "sourceUnit": 5494, "src": "64:34:2", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "contracts/utils/Address.sol", "file": "../utils/Address.sol", "id": 330, "nodeType": "ImportDirective", "scope": 443, "sourceUnit": 6390, "src": "99:30:2", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 331, "name": "ImplementationProvider", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 452, "src": "292:22:2", "typeDescriptions": { "typeIdentifier": "t_contract$_ImplementationProvider_$452", "typeString": "contract ImplementationProvider" } }, "id": 332, "nodeType": "InheritanceSpecifier", "src": "292:22:2" }, { "arguments": null, "baseName": { "contractScope": null, "id": 333, "name": "OpenZeppelinUpgradesOwnable", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 5493, "src": "316:27:2", "typeDescriptions": { "typeIdentifier": "t_contract$_OpenZeppelinUpgradesOwnable_$5493", "typeString": "contract OpenZeppelinUpgradesOwnable" } }, "id": 334, "nodeType": "InheritanceSpecifier", "src": "316:27:2" } ], "contractDependencies": [ 452, 5493 ], "contractKind": "contract", "documentation": "@title ImplementationDirectory\n@dev Implementation provider that stores contract implementations in a mapping.", "fullyImplemented": true, "id": 442, "linearizedBaseContracts": [ 442, 5493, 452 ], "name": "ImplementationDirectory", "nodeType": "ContractDefinition", "nodes": [ { "anonymous": false, "documentation": "@dev Emitted when the implementation of a contract is changed.\n@param contractName Name of the contract.\n@param implementation Address of the added implementation.", "id": 340, "name": "ImplementationChanged", "nodeType": "EventDefinition", "parameters": { "id": 339, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 336, "indexed": false, "name": "contractName", "nodeType": "VariableDeclaration", "scope": 340, "src": "567:19:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 335, "name": "string", "nodeType": "ElementaryTypeName", "src": "567:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 338, "indexed": true, "name": "implementation", "nodeType": "VariableDeclaration", "scope": 340, "src": "588:30:2", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 337, "name": "address", "nodeType": "ElementaryTypeName", "src": "588:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "566:53:2" }, "src": "539:81:2" }, { "anonymous": false, "documentation": "@dev Emitted when the implementation directory is frozen.", "id": 342, "name": "Frozen", "nodeType": "EventDefinition", "parameters": { "id": 341, "nodeType": "ParameterList", "parameters": [], "src": "711:2:2" }, "src": "699:15:2" }, { "constant": false, "id": 346, "name": "implementations", "nodeType": "VariableDeclaration", "scope": 442, "src": "792:52:2", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_string_memory_$_t_address_$", "typeString": "mapping(string => address)" }, "typeName": { "id": 345, "keyType": { "id": 343, "name": "string", "nodeType": "ElementaryTypeName", "src": "801:6:2", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "nodeType": "Mapping", "src": "792:27:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_string_memory_$_t_address_$", "typeString": "mapping(string => address)" }, "valueType": { "id": 344, "name": "address", "nodeType": "ElementaryTypeName", "src": "811:7:2", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 348, "name": "frozen", "nodeType": "VariableDeclaration", "scope": 442, "src": "895:18:2", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 347, "name": "bool", "nodeType": "ElementaryTypeName", "src": "895:4:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "value": null, "visibility": "public" }, { "body": { "id": 357, "nodeType": "Block", "src": "1045:97:2", "statements": [ { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 352, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "!", "prefix": true, "src": "1059:7:2", "subExpression": { "argumentTypes": null, "id": 351, "name": "frozen", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 348, "src": "1060:6:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "43616e6e6f7420706572666f726d20616374696f6e20666f7220612066726f7a656e20696d706c656d656e746174696f6e206469726563746f7279", "id": 353, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "1068:61:2", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_d0d7da8818714c48acc93a148424f682c2ef689209261fbd5d6549d76596a141", "typeString": "literal_string \"Cannot perform action for a frozen implementation directory\"" }, "value": "Cannot perform action for a frozen implementation directory" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_d0d7da8818714c48acc93a148424f682c2ef689209261fbd5d6549d76596a141", "typeString": "literal_string \"Cannot perform action for a frozen implementation directory\"" } ], "id": 350, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 6466, 6467 ], "referencedDeclaration": 6467, "src": "1051:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 354, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1051:79:2", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 355, "nodeType": "ExpressionStatement", "src": "1051:79:2" }, { "id": 356, "nodeType": "PlaceholderStatement", "src": "1136:1:2" } ] }, "documentation": "@dev Modifier that allows functions to be called only before the contract is frozen.", "id": 358, "name": "whenNotFrozen", "nodeType": "ModifierDefinition", "parameters": { "id": 349, "nodeType": "ParameterList", "parameters": [], "src": "1042:2:2" }, "src": "1020:122:2", "visibility": "internal" }, { "body": { "id": 372, "nodeType": "Block", "src": "1308:43:2", "statements": [ { "expression": { "argumentTypes": null, "id": 367, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 365, "name": "frozen", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 348, "src": "1314:6:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "hexValue": "74727565", "id": 366, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "1323:4:2", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "src": "1314:13:2", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 368, "nodeType": "ExpressionStatement", "src": "1314:13:2" }, { "eventCall": { "argumentTypes": null, "arguments": [], "expression": { "argumentTypes": [], "id": 369, "name": "Frozen", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 342, "src": "1338:6:2", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$__$returns$__$", "typeString": "function ()" } }, "id": 370, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1338:8:2", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 371, "nodeType": "EmitStatement", "src": "1333:13:2" } ] }, "documentation": "@dev Makes the directory irreversibly immutable.\nIt can only be called once, by the owner.", "id": 373, "implemented": true, "kind": "function", 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"src": "1259:92:2", "stateMutability": "nonpayable", "superFunction": null, "visibility": "public" }, { "body": { "id": 384, "nodeType": "Block", "src": "1603:47:2", "statements": [ { "expression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 380, "name": "implementations", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 346, "src": "1616:15:2", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_string_memory_$_t_address_$", "typeString": "mapping(string memory => address)" } }, "id": 382, "indexExpression": { "argumentTypes": null, "id": 381, "name": "contractName", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 375, "src": "1632:12:2", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "1616:29:2", "typeDescriptions": { 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}, { "typeIdentifier": "t_stringliteral_3e84e2c3ff1b12226a4666e424ac768ba59a48c1b4ea3afc112d2f6dea61af32", "typeString": "literal_string \"Cannot set implementation in directory with a non-contract address\"" } ], "id": 396, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 6466, 6467 ], "referencedDeclaration": 6467, "src": "1968:7:2", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 402, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1968:133:2", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 403, "nodeType": "ExpressionStatement", "src": "1968:133:2" }, { "expression": { "argumentTypes": null, "id": 408, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, 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"nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 389, "src": "2139:14:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "2107:46:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 409, "nodeType": "ExpressionStatement", "src": "2107:46:2" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 411, "name": "contractName", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 387, "src": "2186:12:2", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, { "argumentTypes": null, "id": 412, "name": "implementation", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 389, "src": "2200:14:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": 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"function", "modifiers": [ { "arguments": null, "id": 392, "modifierName": { "argumentTypes": null, "id": 391, "name": "onlyOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5427, "src": "1938:9:2", "typeDescriptions": { "typeIdentifier": "t_modifier$__$", "typeString": "modifier ()" } }, "nodeType": "ModifierInvocation", "src": "1938:9:2" }, { "arguments": null, "id": 394, "modifierName": { "argumentTypes": null, "id": 393, "name": "whenNotFrozen", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 358, "src": "1948:13:2", "typeDescriptions": { "typeIdentifier": "t_modifier$__$", "typeString": "modifier ()" } }, "nodeType": "ModifierInvocation", "src": "1948:13:2" } ], "name": "setImplementation", "nodeType": "FunctionDefinition", "parameters": { "id": 390, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 387, "name": "contractName", "nodeType": "VariableDeclaration", "scope": 416, "src": 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"t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 430, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2488:10:2", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } }, "src": "2456:42:2", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "id": 432, "nodeType": "ExpressionStatement", "src": "2456:42:2" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 434, "name": "contractName", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 418, "src": "2531:12:2", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" } }, { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "hexValue": "30", "id": 436, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "2553:1:2", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" } ], "id": 435, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "2545:7:2", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 437, "isConstant": false, "isLValue": false, "isPure": true, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2545:10:2", "typeDescriptions": { "typeIdentifier": "t_address_payable", "typeString": "address payable" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_string_memory_ptr", "typeString": "string memory" }, { "typeIdentifier": "t_address_payable", "typeString": "address payable" } ], "id": 433, "name": "ImplementationChanged", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 340, "src": "2509:21:2", "typeDescriptions": { "typeIdentifier": "t_function_event_nonpayable$_t_string_memory_ptr_$_t_address_$returns$__$", "typeString": "function (string memory,address)" } }, "id": 438, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2509:47:2", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 439, "nodeType": "EmitStatement", "src": "2504:52:2" } ] }, "documentation": "@dev Removes the address of a contract implementation from the directory.\n@param contractName Name of the contract.", "id": 441, "implemented": true, "kind": "function", "modifiers": [ { "arguments": null, "id": 421, "modifierName": { "argumentTypes": 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