{ "fileName": "BaseUpgradeabilityProxy.sol", "contractName": "BaseUpgradeabilityProxy", "source": "pragma solidity ^0.5.0;\n\nimport './Proxy.sol';\nimport '../utils/Address.sol';\n\n/**\n * @title BaseUpgradeabilityProxy\n * @dev This contract implements a proxy that allows to change the\n * implementation address to which it will delegate.\n * Such a change is called an implementation upgrade.\n */\ncontract BaseUpgradeabilityProxy is Proxy {\n /**\n * @dev Emitted when the implementation is upgraded.\n * @param implementation Address of the new implementation.\n */\n event Upgraded(address indexed implementation);\n\n /**\n * @dev Storage slot with the address of the current implementation.\n * This is the keccak-256 hash of \"eip1967.proxy.implementation\" subtracted by 1, and is\n * validated in the constructor.\n */\n bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;\n\n /**\n * @dev Returns the current implementation.\n * @return Address of the current implementation\n */\n function _implementation() internal view returns (address impl) {\n bytes32 slot = IMPLEMENTATION_SLOT;\n assembly {\n impl := sload(slot)\n }\n }\n\n /**\n * @dev Upgrades the proxy to a new implementation.\n * @param newImplementation Address of the new implementation.\n */\n function _upgradeTo(address newImplementation) internal {\n _setImplementation(newImplementation);\n emit Upgraded(newImplementation);\n }\n\n /**\n * @dev Sets the implementation address of the proxy.\n * @param newImplementation Address of the new implementation.\n */\n function _setImplementation(address newImplementation) internal {\n require(OpenZeppelinUpgradesAddress.isContract(newImplementation), \"Cannot set a proxy implementation to a non-contract address\");\n\n bytes32 slot = IMPLEMENTATION_SLOT;\n\n assembly {\n sstore(slot, newImplementation)\n }\n }\n}\n", "sourcePath": "contracts/upgradeability/BaseUpgradeabilityProxy.sol", "sourceMap": "295:1540:36:-;;;;8:9:-1;5:2;;;30:1;27;20:12;5:2;295:1540:36;;;;;;;", "deployedSourceMap": "295:1540:36:-;;;453:11:39;:9;:11::i;:::-;295:1540:36;1952:90:39;1988:15;:13;:15::i;:::-;2009:28;2019:17;:15;:17::i;:::-;2009:9;:28::i;:::-;1952:90::o;1818:39::-;:::o;958:156:36:-;1008:12;1028;778:66;1043:19;;1028:34;;1099:4;1093:11;1085:19;;1077:33;;:::o;878:731:39:-;1180:12;1177:1;1174;1161:32;1370:1;1367;1353:12;1350:1;1334:14;1329:3;1316:56;1434:14;1431:1;1428;1413:36;1464:6;1524:1;1519:36;;;;1582:14;1579:1;1572:25;1519:36;1538:14;1535:1;1528:25", "abi": [ { "payable": true, "stateMutability": "payable", "type": "fallback" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "implementation", "type": "address" } ], "name": "Upgraded", "type": "event" } ], "ast": { "absolutePath": "contracts/upgradeability/BaseUpgradeabilityProxy.sol", "exportedSymbols": { "BaseUpgradeabilityProxy": [ 5747 ] }, "id": 5748, "nodeType": "SourceUnit", "nodes": [ { "id": 5691, "literals": [ "solidity", "^", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:36" }, { "absolutePath": "contracts/upgradeability/Proxy.sol", "file": "./Proxy.sol", "id": 5692, "nodeType": "ImportDirective", "scope": 5748, "sourceUnit": 5897, "src": "25:21:36", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "contracts/utils/Address.sol", "file": "../utils/Address.sol", "id": 5693, "nodeType": "ImportDirective", "scope": 5748, "sourceUnit": 6390, "src": "47:30:36", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 5694, "name": "Proxy", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 5896, "src": "331:5:36", "typeDescriptions": { "typeIdentifier": "t_contract$_Proxy_$5896", "typeString": "contract Proxy" } }, "id": 5695, "nodeType": "InheritanceSpecifier", "src": "331:5:36" } ], "contractDependencies": [ 5896 ], "contractKind": "contract", "documentation": "@title BaseUpgradeabilityProxy\n@dev This contract implements a proxy that allows to change the\nimplementation address to which it will delegate.\nSuch a change is called an implementation upgrade.", "fullyImplemented": true, "id": 5747, "linearizedBaseContracts": [ 5747, 5896 ], "name": "BaseUpgradeabilityProxy", "nodeType": "ContractDefinition", "nodes": [ { "anonymous": false, "documentation": "@dev Emitted when the implementation is upgraded.\n@param implementation Address of the new implementation.", "id": 5699, "name": "Upgraded", "nodeType": "EventDefinition", "parameters": { "id": 5698, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5697, "indexed": true, "name": "implementation", "nodeType": "VariableDeclaration", "scope": 5699, "src": "485:30:36", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5696, "name": "address", "nodeType": "ElementaryTypeName", "src": "485:7:36", 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"subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_24440054405305269366569402256811496959409073762505157381672968839269610695612_by_1", "typeString": "int_const 2444...(69 digits omitted)...5612" }, "value": "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc" }, "visibility": "internal" }, { "body": { "id": 5712, "nodeType": "Block", "src": "1022:92:36", "statements": [ { "assignments": [ 5708 ], "declarations": [ { "constant": false, "id": 5708, "name": "slot", "nodeType": "VariableDeclaration", "scope": 5712, "src": "1028:12:36", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5707, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "1028:7:36", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "value": null, "visibility": "internal" } ], "id": 5710, "initialValue": { "argumentTypes": null, "id": 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"referencedDeclaration": 5715, "src": "1330:17:36", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "id": 5718, "name": "_setImplementation", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5746, "src": "1311:18:36", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$returns$__$", "typeString": "function (address)" } }, "id": 5720, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "1311:37:36", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 5721, "nodeType": "ExpressionStatement", "src": "1311:37:36" }, { "eventCall": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 5723, "name": "newImplementation", "nodeType": 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implementation.", "id": 5727, "implemented": true, "kind": "function", "modifiers": [], "name": "_upgradeTo", "nodeType": "FunctionDefinition", "parameters": { "id": 5716, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 5715, "name": "newImplementation", "nodeType": "VariableDeclaration", "scope": 5727, "src": "1269:25:36", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 5714, "name": "address", "nodeType": "ElementaryTypeName", "src": "1269:7:36", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "1268:27:36" }, "returnParameters": { "id": 5717, "nodeType": "ParameterList", "parameters": [], "src": "1305:0:36" }, "scope": 5747, "src": "1249:142:36", "stateMutability": "nonpayable", "superFunction": null, "visibility": "internal" }, { "body": 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