Contract Address Details

// SPDX-License-Identifier: Apache-2.0
// solhint-disable-next-line compiler-version
pragma solidity >=0.6.0 <0.8.0;

import "@openzeppelin/contracts/proxy/BeaconProxy.sol";
import "@openzeppelin/contracts/proxy/UpgradeableBeacon.sol";
import "@openzeppelin/contracts/utils/Create2.sol";

interface ProxySetter {
    function beacon() external view returns (address);
}

contract ClonableBeaconProxy is BeaconProxy {
    constructor() public BeaconProxy(ProxySetter(msg.sender).beacon(), "") {}
}

contract BeaconProxyFactory is ProxySetter {
    bytes32 public constant cloneableProxyHash = keccak256(type(ClonableBeaconProxy).creationCode);

    /**
     * @notice utility function used in ClonableBeaconProxy.
     * @dev this method makes it possible to use ClonableBeaconProxy.creationCode without encoding constructor parameters
     * @return the beacon to be used by the proxy contract.
     */
    address public override beacon;

    function initialize(address _beacon) external {
        require(_beacon != address(0), "INVALID_BEACON");
        require(beacon == address(0), "ALREADY_INIT");
        beacon = _beacon;
    }

    function getSalt(address user, bytes32 userSalt) public pure returns (bytes32) {
        return keccak256(abi.encode(user, userSalt));
    }

    function createProxy(bytes32 userSalt) external returns (address) {
        // deployment will fail and this function will revert if contract `salt` is not unique
        bytes32 salt = getSalt(msg.sender, userSalt);
        address createdContract = address(new ClonableBeaconProxy{ salt: salt }());
        return createdContract;
    }

    function calculateExpectedAddress(address user, bytes32 userSalt)
        public
        view
        returns (address)
    {
        bytes32 salt = getSalt(user, userSalt);
        return Create2.computeAddress(salt, cloneableProxyHash, address(this));
    }

    function calculateExpectedAddress(bytes32 salt) public view returns (address) {
        return Create2.computeAddress(salt, cloneableProxyHash, address(this));
    }
}
        

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../utils/Context.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.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}