@daostack/upgrades

{ "fileName": "Initializable.sol", "contractName": "Initializable", "source": "pragma solidity >=0.4.24 <0.7.0;\n// SPDX-License-Identifier: MIT\n\n\n/**\n * @title Initializable\n *\n * @dev Helper contract to support initializer functions. To use it, replace\n * the constructor with a function that has the `initializer` modifier.\n * WARNING: Unlike constructors, initializer functions must be manually\n * invoked. This applies both to deploying an Initializable contract, as well\n * as extending an Initializable contract via inheritance.\n * WARNING: When used with inheritance, manual care must be taken to not invoke\n * a parent initializer twice, or ensure that all initializers are idempotent,\n * because this is not dealt with automatically as with constructors.\n */\ncontract Initializable {\n\n /**\n * @dev Indicates that the contract has been initialized.\n */\n bool private initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private initializing;\n\n /**\n * @dev Modifier to use in the initializer function of a contract.\n */\n modifier initializer() {\n require(initializing || isConstructor() || !initialized, \"Contract instance has already been initialized\");\n\n bool isTopLevelCall = !initializing;\n if (isTopLevelCall) {\n initializing = true;\n initialized = true;\n }\n\n _;\n\n if (isTopLevelCall) {\n initializing = false;\n }\n }\n\n /// @dev Returns true if and only if the function is running in the constructor\n function isConstructor() private view returns (bool) {\n // extcodesize checks the size of the code stored in an address, and\n // address returns the current address. Since the code is still not\n // deployed when running a constructor, any checks on its code size will\n // yield zero, making it an effective way to detect if a contract is\n // under construction or not.\n address self = address(this);\n uint256 cs;\n assembly { cs := extcodesize(self) }\n return cs == 0;\n }\n\n // Reserved storage space to allow for layout changes in the future.\n uint256[50] private ______gap;\n}\n", "sourcePath": "contracts/Initializable.sol", "sourceMap": "689:1357:0:-:0;;;;;;;;;;;;;;;;;;;;;;", "deployedSourceMap": "689:1357:0:-:0;;;;;;;;;;;", "abi": [], "ast": { "absolutePath": "contracts/Initializable.sol", "exportedSymbols": { "Initializable": [ 74 ] }, "id": 75, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 1, "literals": [ "solidity", ">=", "0.4", ".24", "<", "0.7", ".0" ], "nodeType": "PragmaDirective", "src": "0:32:0" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "contract", "documentation": { "id": 2, "nodeType": "StructuredDocumentation", "src": "67:621:0", "text": " @title Initializable\n @dev Helper contract to support initializer functions. To use it, replace\n the constructor with a function that has the `initializer` modifier.\n WARNING: Unlike constructors, initializer functions must be manually\n invoked. This applies both to deploying an Initializable contract, as well\n as extending an Initializable contract via inheritance.\n WARNING: When used with inheritance, manual care must be taken to not invoke\n a parent initializer twice, or ensure that all initializers are idempotent,\n because this is not dealt with automatically as with constructors." }, "fullyImplemented": true, "id": 74, "linearizedBaseContracts": [ 74 ], "name": "Initializable", "nodeType": "ContractDefinition", "nodes": [ { "constant": false, "documentation": { "id": 3, "nodeType": "StructuredDocumentation", "src": "717:69:0", "text": " @dev Indicates that the contract has been initialized." }, "id": 5, "mutability": "mutable", "name": "initialized", "nodeType": "VariableDeclaration", "overrides": null, "scope": 74, "src": "789:24:0", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "typeName": { "id": 4, "name": "bool", "nodeType": 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