// SPDX-License-Identifier: MIT
pragma solidity 0.8.15;

/**
 * @title IL1ChugSplashDeployer
 */
interface IL1ChugSplashDeployer {
    function isUpgrading() external view returns (bool);
}

/**
 * @custom:legacy
 * @title L1ChugSplashProxy
 * @notice Basic ChugSplash proxy contract for L1. Very close to being a normal proxy but has added
 *         functions `setCode` and `setStorage` for changing the code or storage of the contract.
 *
 *         Note for future developers: do NOT make anything in this contract 'public' unless you
 *         know what you're doing. Anything public can potentially have a function signature that
 *         conflicts with a signature attached to the implementation contract. Public functions
 *         SHOULD always have the `proxyCallIfNotOwner` modifier unless there's some *really* good
 *         reason not to have that modifier. And there almost certainly is not a good reason to not
 *         have that modifier. Beware!
 */
contract L1ChugSplashProxy {
    /**
     * @notice "Magic" prefix. When prepended to some arbitrary bytecode and used to create a
     *         contract, the appended bytecode will be deployed as given.
     */
    bytes13 internal constant DEPLOY_CODE_PREFIX = 0x600D380380600D6000396000f3;

    /**
     * @notice bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)
     */
    bytes32 internal constant IMPLEMENTATION_KEY =
        0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @notice bytes32(uint256(keccak256('eip1967.proxy.admin')) - 1)
     */
    bytes32 internal constant OWNER_KEY =
        0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @notice Blocks a function from being called when the parent signals that the system should
     *         be paused via an isUpgrading function.
     */
    modifier onlyWhenNotPaused() {
        address owner = _getOwner();

        // We do a low-level call because there's no guarantee that the owner actually *is* an
        // L1ChugSplashDeployer contract and Solidity will throw errors if we do a normal call and
        // it turns out that it isn't the right type of contract.
        (bool success, bytes memory returndata) = owner.staticcall(
            abi.encodeWithSelector(IL1ChugSplashDeployer.isUpgrading.selector)
        );

        // If the call was unsuccessful then we assume that there's no "isUpgrading" method and we
        // can just continue as normal. We also expect that the return value is exactly 32 bytes
        // long. If this isn't the case then we can safely ignore the result.
        if (success && returndata.length == 32) {
            // Although the expected value is a *boolean*, it's safer to decode as a uint256 in the
            // case that the isUpgrading function returned something other than 0 or 1. But we only
            // really care about the case where this value is 0 (= false).
            uint256 ret = abi.decode(returndata, (uint256));
            require(ret == 0, "L1ChugSplashProxy: system is currently being upgraded");
        }

        _;
    }

    /**
     * @notice Makes a proxy call instead of triggering the given function when the caller is
     *         either the owner or the zero address. Caller can only ever be the zero address if
     *         this function is being called off-chain via eth_call, which is totally fine and can
     *         be convenient for client-side tooling. Avoids situations where the proxy and
     *         implementation share a sighash and the proxy function ends up being called instead
     *         of the implementation one.
     *
     *         Note: msg.sender == address(0) can ONLY be triggered off-chain via eth_call. If
     *         there's a way for someone to send a transaction with msg.sender == address(0) in any
     *         real context then we have much bigger problems. Primary reason to include this
     *         additional allowed sender is because the owner address can be changed dynamically
     *         and we do not want clients to have to keep track of the current owner in order to
     *         make an eth_call that doesn't trigger the proxied contract.
     */
    // slither-disable-next-line incorrect-modifier
    modifier proxyCallIfNotOwner() {
        if (msg.sender == _getOwner() || msg.sender == address(0)) {
            _;
        } else {
            // This WILL halt the call frame on completion.
            _doProxyCall();
        }
    }

    /**
     * @param _owner Address of the initial contract owner.
     */
    constructor(address _owner) {
        _setOwner(_owner);
    }

    // slither-disable-next-line locked-ether
    receive() external payable {
        // Proxy call by default.
        _doProxyCall();
    }

    // slither-disable-next-line locked-ether
    fallback() external payable {
        // Proxy call by default.
        _doProxyCall();
    }

    /**
     * @notice Sets the code that should be running behind this proxy.
     *
     *         Note: This scheme is a bit different from the standard proxy scheme where one would
     *         typically deploy the code separately and then set the implementation address. We're
     *         doing it this way because it gives us a lot more freedom on the client side. Can
     *         only be triggered by the contract owner.
     *
     * @param _code New contract code to run inside this contract.
     */
    function setCode(bytes memory _code) external proxyCallIfNotOwner {
        // Get the code hash of the current implementation.
        address implementation = _getImplementation();

        // If the code hash matches the new implementation then we return early.
        if (keccak256(_code) == _getAccountCodeHash(implementation)) {
            return;
        }

        // Create the deploycode by appending the magic prefix.
        bytes memory deploycode = abi.encodePacked(DEPLOY_CODE_PREFIX, _code);

        // Deploy the code and set the new implementation address.
        address newImplementation;
        assembly {
            newImplementation := create(0x0, add(deploycode, 0x20), mload(deploycode))
        }

        // Check that the code was actually deployed correctly. I'm not sure if you can ever
        // actually fail this check. Should only happen if the contract creation from above runs
        // out of gas but this parent execution thread does NOT run out of gas. Seems like we
        // should be doing this check anyway though.
        require(
            _getAccountCodeHash(newImplementation) == keccak256(_code),
            "L1ChugSplashProxy: code was not correctly deployed"
        );

        _setImplementation(newImplementation);
    }

    /**
     * @notice Modifies some storage slot within the proxy contract. Gives us a lot of power to
     *         perform upgrades in a more transparent way. Only callable by the owner.
     *
     * @param _key   Storage key to modify.
     * @param _value New value for the storage key.
     */
    function setStorage(bytes32 _key, bytes32 _value) external proxyCallIfNotOwner {
        assembly {
            sstore(_key, _value)
        }
    }

    /**
     * @notice Changes the owner of the proxy contract. Only callable by the owner.
     *
     * @param _owner New owner of the proxy contract.
     */
    function setOwner(address _owner) external proxyCallIfNotOwner {
        _setOwner(_owner);
    }

    /**
     * @notice Queries the owner of the proxy contract. Can only be called by the owner OR by
     *         making an eth_call and setting the "from" address to address(0).
     *
     * @return Owner address.
     */
    function getOwner() external proxyCallIfNotOwner returns (address) {
        return _getOwner();
    }

    /**
     * @notice Queries the implementation address. Can only be called by the owner OR by making an
     *         eth_call and setting the "from" address to address(0).
     *
     * @return Implementation address.
     */
    function getImplementation() external proxyCallIfNotOwner returns (address) {
        return _getImplementation();
    }

    /**
     * @notice Sets the implementation address.
     *
     * @param _implementation New implementation address.
     */
    function _setImplementation(address _implementation) internal {
        assembly {
            sstore(IMPLEMENTATION_KEY, _implementation)
        }
    }

    /**
     * @notice Changes the owner of the proxy contract.
     *
     * @param _owner New owner of the proxy contract.
     */
    function _setOwner(address _owner) internal {
        assembly {
            sstore(OWNER_KEY, _owner)
        }
    }

    /**
     * @notice Performs the proxy call via a delegatecall.
     */
    function _doProxyCall() internal onlyWhenNotPaused {
        address implementation = _getImplementation();

        require(implementation != address(0), "L1ChugSplashProxy: implementation is not set yet");

        assembly {
            // Copy calldata into memory at 0x0....calldatasize.
            calldatacopy(0x0, 0x0, calldatasize())

            // Perform the delegatecall, make sure to pass all available gas.
            let success := delegatecall(gas(), implementation, 0x0, calldatasize(), 0x0, 0x0)

            // Copy returndata into memory at 0x0....returndatasize. Note that this *will*
            // overwrite the calldata that we just copied into memory but that doesn't really
            // matter because we'll be returning in a second anyway.
            returndatacopy(0x0, 0x0, returndatasize())

            // Success == 0 means a revert. We'll revert too and pass the data up.
            if iszero(success) {
                revert(0x0, returndatasize())
            }

            // Otherwise we'll just return and pass the data up.
            return(0x0, returndatasize())
        }
    }

    /**
     * @notice Queries the implementation address.
     *
     * @return Implementation address.
     */
    function _getImplementation() internal view returns (address) {
        address implementation;
        assembly {
            implementation := sload(IMPLEMENTATION_KEY)
        }
        return implementation;
    }

    /**
     * @notice Queries the owner of the proxy contract.
     *
     * @return Owner address.
     */
    function _getOwner() internal view returns (address) {
        address owner;
        assembly {
            owner := sload(OWNER_KEY)
        }
        return owner;
    }

    /**
     * @notice Gets the code hash for a given account.
     *
     * @param _account Address of the account to get a code hash for.
     *
     * @return Code hash for the account.
     */
    function _getAccountCodeHash(address _account) internal view returns (bytes32) {
        bytes32 codeHash;
        assembly {
            codeHash := extcodehash(_account)
        }
        return codeHash;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "bytecodeHash": "none"
  },
  "libraries": {}
}

[{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"getImplementation","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes","name":"_code","type":"bytes"}],"name":"setCode","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"setOwner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_key","type":"bytes32"},{"internalType":"bytes32","name":"_value","type":"bytes32"}],"name":"setStorage","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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