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// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.10;

import {IFactoryUpgradeGate} from "./interfaces/IFactoryUpgradeGate.sol";
import "./utils/OwnableSkeleton.sol";

contract FactoryUpgradeGate is IFactoryUpgradeGate, OwnableSkeleton {
    mapping(address => mapping(address => bool)) private _validUpgradePaths;

    event UpgradePathRegistered(address newImpl, address oldImpl);
    event UpgradePathRemoved(address newImpl, address oldImpl);

    modifier onlyOwner() {
        require(msg.sender == owner(), "only owner");

        _;
    }

    constructor(address _owner) {
        _setOwner(_owner);
    }

    /// @notice Ensures the given upgrade path is valid and does not overwrite existing storage slots
    /// @param _newImpl The proposed implementation address
    /// @param _currentImpl The current implementation address
    function isValidUpgradePath(address _newImpl, address _currentImpl) external view returns (bool) {
        return _validUpgradePaths[_newImpl][_currentImpl];
    }

    /// @notice Registers a new safe upgrade path for an implementation
    /// @param _newImpl The new implementation
    /// @param _supportedPrevImpls Safe implementations that can upgrade to this new implementation
    function registerNewUpgradePath(address _newImpl, address[] calldata _supportedPrevImpls) external onlyOwner {
        for (uint256 i = 0; i < _supportedPrevImpls.length; i++) {
            _validUpgradePaths[_newImpl][_supportedPrevImpls[i]] = true;
            emit UpgradePathRegistered(_newImpl, _supportedPrevImpls[i]);
        }
    }

    /// @notice Unregisters an upgrade path, in case of emergency
    /// @param _newImpl the newer implementation
    /// @param _prevImpl the older implementation
    function unregisterUpgradePath(address _newImpl, address _prevImpl) external onlyOwner {
        _validUpgradePaths[_newImpl][_prevImpl] = false;
        emit UpgradePathRemoved(_newImpl, _prevImpl);
    }
}

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.10;

interface IFactoryUpgradeGate {
  function isValidUpgradePath(address _newImpl, address _currentImpl) external returns (bool);

  function registerNewUpgradePath(address _newImpl, address[] calldata _supportedPrevImpls) external;

  function unregisterUpgradePath(address _newImpl, address _prevImpl) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

import {IOwnable} from "../interfaces/IOwnable.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * This ownership interface matches OZ's ownable interface.
 */
contract OwnableSkeleton is IOwnable {
    address private _owner;

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    function _setOwner(address newAddress) internal {
        emit OwnershipTransferred(_owner, newAddress);
        _owner = newAddress;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * This ownership interface matches OZ's ownable interface.
 *
 */
interface IOwnable {
    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() external view returns (address);
}

{
  "remappings": [
    "@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "ERC721A-Upgradeable/=lib/ERC721A-Upgradeable/contracts/",
    "base64/=lib/base64/",
    "ds-test/=lib/ds-test/src/",
    "erc721a-upgradeable/=lib/ERC721A-Upgradeable/contracts/",
    "forge-std/=lib/forge-std/src/",
    "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "src/=src/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 5000
  },
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "london"
}

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[{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newImpl","type":"address"},{"indexed":false,"internalType":"address","name":"oldImpl","type":"address"}],"name":"UpgradePathRegistered","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newImpl","type":"address"},{"indexed":false,"internalType":"address","name":"oldImpl","type":"address"}],"name":"UpgradePathRemoved","type":"event"},{"inputs":[{"internalType":"address","name":"_newImpl","type":"address"},{"internalType":"address","name":"_currentImpl","type":"address"}],"name":"isValidUpgradePath","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_newImpl","type":"address"},{"internalType":"address[]","name":"_supportedPrevImpls","type":"address[]"}],"name":"registerNewUpgradePath","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newImpl","type":"address"},{"internalType":"address","name":"_prevImpl","type":"address"}],"name":"unregisterUpgradePath","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000000000000d1d1d4e36117ab794ec5d4c78cbd3a8904e691d0

-----Decoded View---------------
Arg [0] : _owner (address): 0xd1d1D4e36117aB794ec5d4c78cBD3a8904E691D0

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000d1d1d4e36117ab794ec5d4c78cbd3a8904e691d0