Cryo Explorer Ethereum Mainnet

pragma solidity ^0.8.0;

// SPDX-License-Identifier: MIT OR Apache-2.0



import "./Ownable.sol";
import "./Upgradeable.sol";
import "./UpgradeableMaster.sol";

/// @title Proxy Contract
/// @dev NOTICE: Proxy must implement UpgradeableMaster interface to prevent calling some function of it not by master of proxy
/// @author Matter Labs
contract Proxy is Upgradeable, Ownable {
    /// @dev Storage position of "target" (actual implementation address: keccak256('eip1967.proxy.implementation') - 1)
    bytes32 private constant TARGET_POSITION = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /// @notice Contract constructor
    /// @dev Calls Ownable contract constructor and initialize target
    /// @param target Initial implementation address
    /// @param targetInitializationParameters Target initialization parameters
    constructor(address target, bytes memory targetInitializationParameters) Ownable(msg.sender) {
        setTarget(target);
        // solhint-disable-next-line avoid-low-level-calls
        (bool initializationSuccess, ) = getTarget().delegatecall(abi.encodeWithSignature("initialize(bytes)", targetInitializationParameters));
        require(initializationSuccess, "uin11"); // uin11 - target initialization failed
    }

    /// @notice Intercepts initialization calls
    function initialize(bytes calldata) external pure {
        revert("ini11"); // ini11 - interception of initialization call
    }

    /// @notice Returns target of contract
    /// @return target Actual implementation address
    function getTarget() public view returns (address target) {
        bytes32 position = TARGET_POSITION;
        assembly {
            target := sload(position)
        }
    }

    /// @notice Sets new target of contract
    /// @param _newTarget New actual implementation address
    function setTarget(address _newTarget) internal {
        bytes32 position = TARGET_POSITION;
        assembly {
            sstore(position, _newTarget)
        }
    }

    /// @notice Upgrades target
    /// @param newTarget New target
    function upgradeTarget(address newTarget) external override {
        requireMaster(msg.sender);

        setTarget(newTarget);
    }

    /// @notice Performs a delegatecall to the contract implementation
    /// @dev Fallback function allowing to perform a delegatecall to the given implementation
    /// This function will return whatever the implementation call returns
    function _fallback() internal {
        address _target = getTarget();
        assembly {
            // The pointer to the free memory slot
            let ptr := mload(0x40)
            // Copy function signature and arguments from calldata at zero position into memory at pointer position
            calldatacopy(ptr, 0x0, calldatasize())
            // Delegatecall method of the implementation contract, returns 0 on error
            let result := delegatecall(gas(), _target, ptr, calldatasize(), 0x0, 0)
            // Get the size of the last return data
            let size := returndatasize()
            // Copy the size length of bytes from return data at zero position to pointer position
            returndatacopy(ptr, 0x0, size)
            // Depending on result value
            switch result
                case 0 {
                    // End execution and revert state changes
                    revert(ptr, size)
                }
                default {
                    // Return data with length of size at pointers position
                    return(ptr, size)
                }
        }
    }

    /// @notice Will run when no functions matches call data
    fallback() external payable {
        _fallback();
    }

    /// @notice Same as fallback but called when calldata is empty
    receive() external payable {
        _fallback();
    }
}

pragma solidity ^0.8.0;

// SPDX-License-Identifier: MIT OR Apache-2.0



/// @title Ownable Contract
/// @author Matter Labs
contract Ownable {
    /// @dev Storage position of the masters address (keccak256('eip1967.proxy.admin') - 1)
    bytes32 private constant MASTER_POSITION = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /// @notice Contract constructor
    /// @dev Sets msg sender address as masters address
    /// @param masterAddress Master address
    constructor(address masterAddress) {
        setMaster(masterAddress);
    }

    /// @notice Check if specified address is master
    /// @param _address Address to check
    function requireMaster(address _address) internal view {
        require(_address == getMaster(), "1c"); // oro11 - only by master
    }

    /// @notice Returns contract masters address
    /// @return master Master's address
    function getMaster() public view returns (address master) {
        bytes32 position = MASTER_POSITION;
        assembly {
            master := sload(position)
        }
    }

    /// @dev Sets new masters address
    /// @param _newMaster New master's address
    function setMaster(address _newMaster) internal {
        bytes32 position = MASTER_POSITION;
        assembly {
            sstore(position, _newMaster)
        }
    }

    /// @notice Transfer mastership of the contract to new master
    /// @param _newMaster New masters address
    function transferMastership(address _newMaster) external {
        requireMaster(msg.sender);
        require(_newMaster != address(0), "1d"); // otp11 - new masters address can't be zero address
        setMaster(_newMaster);
    }
}

pragma solidity ^0.8.0;

// SPDX-License-Identifier: MIT OR Apache-2.0



/// @title Interface of the upgradeable contract
/// @author Matter Labs
interface Upgradeable {
    /// @notice Upgrades target of upgradeable contract
    /// @param newTarget New target
    function upgradeTarget(address newTarget) external;
}

pragma solidity ^0.8.0;

// SPDX-License-Identifier: MIT OR Apache-2.0



/// @title Interface of the upgradeable master contract (defines notice period duration and allows finish upgrade during preparation of it)
/// @author Matter Labs
interface UpgradeableMaster {
    /// @notice Notice period before activation preparation status of upgrade mode
    function getNoticePeriod() external returns (uint256);

    /// @notice Checks that contract is ready for upgrade
    /// @return bool flag indicating that contract is ready for upgrade
    function isReadyForUpgrade() external returns (bool);
}