// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/transparent/TransparentUpgradeableProxy.sol)
pragma solidity ^0.8.0;
import "../ERC1967/ERC1967Proxy.sol";
/**
 * @dev Interface for {TransparentUpgradeableProxy}. In order to implement transparency, {TransparentUpgradeableProxy}
 * does not implement this interface directly, and some of its functions are implemented by an internal dispatch
 * mechanism. The compiler is unaware that these functions are implemented by {TransparentUpgradeableProxy} and will not
 * include them in the ABI so this interface must be used to interact with it.
 */
interface ITransparentUpgradeableProxy is IERC1967 {
    function admin() external view returns (address);
    function implementation() external view returns (address);
    function changeAdmin(address) external;
    function upgradeTo(address) external;
    function upgradeToAndCall(address, bytes memory) external payable;
}
/**
 * @dev This contract implements a proxy that is upgradeable by an admin.
 *
 * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
 * clashing], which can potentially be used in an attack, this contract uses the
 * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
 * things that go hand in hand:
 *
 * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
 * that call matches one of the admin functions exposed by the proxy itself.
 * 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the
 * implementation. If the admin tries to call a function on the implementation it will fail with an error that says
 * "admin cannot fallback to proxy target".
 *
 * These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing
 * the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due
 * to sudden errors when trying to call a function from the proxy implementation.
 *
 * Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way,
 * you should think of the `ProxyAdmin` instance as the real administrative interface of your proxy.
 *
 * NOTE: The real interface of this proxy is that defined in `ITransparentUpgradeableProxy`. This contract does not
 * inherit from that interface, and instead the admin functions are implicitly implemented using a custom dispatch
 * mechanism in `_fallback`. Consequently, the compiler will not produce an ABI for this contract. This is necessary to
 * fully implement transparency without decoding reverts caused by selector clashes between the proxy and the
 * implementation.
 *
 * WARNING: It is not recommended to extend this contract to add additional external functions. If you do so, the compiler
 * will not check that there are no selector conflicts, due to the note above. A selector clash between any new function
 * and the functions declared in {ITransparentUpgradeableProxy} will be resolved in favor of the new one. This could
 * render the admin operations inaccessible, which could prevent upgradeability. Transparency may also be compromised.
 */
contract TransparentUpgradeableProxy is ERC1967Proxy {
    /**
     * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
     * optionally initialized with `_data` as explained in {ERC1967Proxy-constructor}.
     */
    constructor(address _logic, address admin_, bytes memory _data) payable ERC1967Proxy(_logic, _data) {
        _changeAdmin(admin_);
    }
    /**
     * @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
     *
     * CAUTION: This modifier is deprecated, as it could cause issues if the modified function has arguments, and the
     * implementation provides a function with the same selector.
     */
    modifier ifAdmin() {
        if (msg.sender == _getAdmin()) {
            _;
        } else {
            _fallback();
        }
    }
    /**
     * @dev If caller is the admin process the call internally, otherwise transparently fallback to the proxy behavior
     */
    function _fallback() internal virtual override {
        if (msg.sender == _getAdmin()) {
            bytes memory ret;
            bytes4 selector = msg.sig;
            if (selector == ITransparentUpgradeableProxy.upgradeTo.selector) {
                ret = _dispatchUpgradeTo();
            } else if (selector == ITransparentUpgradeableProxy.upgradeToAndCall.selector) {
                ret = _dispatchUpgradeToAndCall();
            } else if (selector == ITransparentUpgradeableProxy.changeAdmin.selector) {
                ret = _dispatchChangeAdmin();
            } else if (selector == ITransparentUpgradeableProxy.admin.selector) {
                ret = _dispatchAdmin();
            } else if (selector == ITransparentUpgradeableProxy.implementation.selector) {
                ret = _dispatchImplementation();
            } else {
                revert("TransparentUpgradeableProxy: admin cannot fallback to proxy target");
            }
            assembly {
                return(add(ret, 0x20), mload(ret))
            }
        } else {
            super._fallback();
        }
    }
    /**
     * @dev Returns the current admin.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function _dispatchAdmin() private returns (bytes memory) {
        _requireZeroValue();
        address admin = _getAdmin();
        return abi.encode(admin);
    }
    /**
     * @dev Returns the current implementation.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
     */
    function _dispatchImplementation() private returns (bytes memory) {
        _requireZeroValue();
        address implementation = _implementation();
        return abi.encode(implementation);
    }
    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _dispatchChangeAdmin() private returns (bytes memory) {
        _requireZeroValue();
        address newAdmin = abi.decode(msg.data[4:], (address));
        _changeAdmin(newAdmin);
        return "";
    }
    /**
     * @dev Upgrade the implementation of the proxy.
     */
    function _dispatchUpgradeTo() private returns (bytes memory) {
        _requireZeroValue();
        address newImplementation = abi.decode(msg.data[4:], (address));
        _upgradeToAndCall(newImplementation, bytes(""), false);
        return "";
    }
    /**
     * @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified
     * by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the
     * proxied contract.
     */
    function _dispatchUpgradeToAndCall() private returns (bytes memory) {
        (address newImplementation, bytes memory data) = abi.decode(msg.data[4:], (address, bytes));
        _upgradeToAndCall(newImplementation, data, true);
        return "";
    }
    /**
     * @dev Returns the current admin.
     *
     * CAUTION: This function is deprecated. Use {ERC1967Upgrade-_getAdmin} instead.
     */
    function _admin() internal view virtual returns (address) {
        return _getAdmin();
    }
    /**
     * @dev To keep this contract fully transparent, all `ifAdmin` functions must be payable. This helper is here to
     * emulate some proxy functions being non-payable while still allowing value to pass through.
     */
    function _requireZeroValue() private {
        require(msg.value == 0);
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/ERC1967/ERC1967Proxy.sol)
pragma solidity ^0.8.0;
import "../Proxy.sol";
import "./ERC1967Upgrade.sol";
/**
 * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
 * implementation address that can be changed. This address is stored in storage in the location specified by
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
 * implementation behind the proxy.
 */
contract ERC1967Proxy is Proxy, ERC1967Upgrade {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
     *
     * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
     * function call, and allows initializing the storage of the proxy like a Solidity constructor.
     */
    constructor(address _logic, bytes memory _data) payable {
        _upgradeToAndCall(_logic, _data, false);
    }
    /**
     * @dev Returns the current implementation address.
     */
    function _implementation() internal view virtual override returns (address impl) {
        return ERC1967Upgrade._getImplementation();
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())
            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())
            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }
    /**
     * @dev This is a virtual function that should be overridden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);
    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }
    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }
    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive() external payable virtual {
        _fallback();
    }
    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overridden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/ERC1967/ERC1967Upgrade.sol)
pragma solidity ^0.8.2;
import "../beacon/IBeacon.sol";
import "../../interfaces/IERC1967.sol";
import "../../interfaces/draft-IERC1822.sol";
import "../../utils/Address.sol";
import "../../utils/StorageSlot.sol";
/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 */
abstract contract ERC1967Upgrade is IERC1967 {
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }
    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }
    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }
    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(address newImplementation, bytes memory data, bool forceCall) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }
    }
    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(address newImplementation, bytes memory data, bool forceCall) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlot.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }
    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
    }
    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }
    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }
    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
    }
    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(Address.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            Address.isContract(IBeacon(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }
    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)
pragma solidity ^0.8.0;
/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeacon {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC1967.sol)
pragma solidity ^0.8.0;
/**
 * @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
 *
 * _Available since v4.8.3._
 */
interface IERC1967 {
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);
    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);
    /**
     * @dev Emitted when the beacon is changed.
     */
    event BeaconUpgraded(address indexed beacon);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)
pragma solidity ^0.8.0;
/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822Proxiable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.
        return account.code.length > 0;
    }
    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }
    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }
    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.
pragma solidity ^0.8.0;
/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```solidity
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._
 * _Available since v4.9 for `string`, `bytes`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }
    struct BooleanSlot {
        bool value;
    }
    struct Bytes32Slot {
        bytes32 value;
    }
    struct Uint256Slot {
        uint256 value;
    }
    struct StringSlot {
        string value;
    }
    struct BytesSlot {
        bytes value;
    }
    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `StringSlot` with member `value` located at `slot`.
     */
    function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
     */
    function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }
    /**
     * @dev Returns an `BytesSlot` with member `value` located at `slot`.
     */
    function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
     */
    function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }
}

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;

/// @title IProxy - Helper interface to access masterCopy of the Proxy on-chain
/// @author Richard Meissner - <[email protected]>
interface IProxy {
    function masterCopy() external view returns (address);
}

/// @title GnosisSafeProxy - Generic proxy contract allows to execute all transactions applying the code of a master contract.
/// @author Stefan George - <[email protected]>
/// @author Richard Meissner - <[email protected]>
contract GnosisSafeProxy {
    // singleton always needs to be first declared variable, to ensure that it is at the same location in the contracts to which calls are delegated.
    // To reduce deployment costs this variable is internal and needs to be retrieved via `getStorageAt`
    address internal singleton;

    /// @dev Constructor function sets address of singleton contract.
    /// @param _singleton Singleton address.
    constructor(address _singleton) {
        require(_singleton != address(0), "Invalid singleton address provided");
        singleton = _singleton;
    }

    /// @dev Fallback function forwards all transactions and returns all received return data.
    fallback() external payable {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let _singleton := and(sload(0), 0xffffffffffffffffffffffffffffffffffffffff)
            // 0xa619486e == keccak("masterCopy()"). The value is right padded to 32-bytes with 0s
            if eq(calldataload(0), 0xa619486e00000000000000000000000000000000000000000000000000000000) {
                mstore(0, _singleton)
                return(0, 0x20)
            }
            calldatacopy(0, 0, calldatasize())
            let success := delegatecall(gas(), _singleton, 0, calldatasize(), 0, 0)
            returndatacopy(0, 0, returndatasize())
            if eq(success, 0) {
                revert(0, returndatasize())
            }
            return(0, returndatasize())
        }
    }
}

/// @title Proxy Factory - Allows to create new proxy contact and execute a message call to the new proxy within one transaction.
/// @author Stefan George - <[email protected]>
contract GnosisSafeProxyFactory {
    event ProxyCreation(GnosisSafeProxy proxy, address singleton);

    /// @dev Allows to create new proxy contact and execute a message call to the new proxy within one transaction.
    /// @param singleton Address of singleton contract.
    /// @param data Payload for message call sent to new proxy contract.
    function createProxy(address singleton, bytes memory data) public returns (GnosisSafeProxy proxy) {
        proxy = new GnosisSafeProxy(singleton);
        if (data.length > 0)
            // solhint-disable-next-line no-inline-assembly
            assembly {
                if eq(call(gas(), proxy, 0, add(data, 0x20), mload(data), 0, 0), 0) {
                    revert(0, 0)
                }
            }
        emit ProxyCreation(proxy, singleton);
    }

    /// @dev Allows to retrieve the runtime code of a deployed Proxy. This can be used to check that the expected Proxy was deployed.
    function proxyRuntimeCode() public pure returns (bytes memory) {
        return type(GnosisSafeProxy).runtimeCode;
    }

    /// @dev Allows to retrieve the creation code used for the Proxy deployment. With this it is easily possible to calculate predicted address.
    function proxyCreationCode() public pure returns (bytes memory) {
        return type(GnosisSafeProxy).creationCode;
    }

    /// @dev Allows to create new proxy contact using CREATE2 but it doesn't run the initializer.
    ///      This method is only meant as an utility to be called from other methods
    /// @param _singleton Address of singleton contract.
    /// @param initializer Payload for message call sent to new proxy contract.
    /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract.
    function deployProxyWithNonce(
        address _singleton,
        bytes memory initializer,
        uint256 saltNonce
    ) internal returns (GnosisSafeProxy proxy) {
        // If the initializer changes the proxy address should change too. Hashing the initializer data is cheaper than just concatinating it
        bytes32 salt = keccak256(abi.encodePacked(keccak256(initializer), saltNonce));
        bytes memory deploymentData = abi.encodePacked(type(GnosisSafeProxy).creationCode, uint256(uint160(_singleton)));
        // solhint-disable-next-line no-inline-assembly
        assembly {
            proxy := create2(0x0, add(0x20, deploymentData), mload(deploymentData), salt)
        }
        require(address(proxy) != address(0), "Create2 call failed");
    }

    /// @dev Allows to create new proxy contact and execute a message call to the new proxy within one transaction.
    /// @param _singleton Address of singleton contract.
    /// @param initializer Payload for message call sent to new proxy contract.
    /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract.
    function createProxyWithNonce(
        address _singleton,
        bytes memory initializer,
        uint256 saltNonce
    ) public returns (GnosisSafeProxy proxy) {
        proxy = deployProxyWithNonce(_singleton, initializer, saltNonce);
        if (initializer.length > 0)
            // solhint-disable-next-line no-inline-assembly
            assembly {
                if eq(call(gas(), proxy, 0, add(initializer, 0x20), mload(initializer), 0, 0), 0) {
                    revert(0, 0)
                }
            }
        emit ProxyCreation(proxy, _singleton);
    }

    /// @dev Allows to create new proxy contact, execute a message call to the new proxy and call a specified callback within one transaction
    /// @param _singleton Address of singleton contract.
    /// @param initializer Payload for message call sent to new proxy contract.
    /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract.
    /// @param callback Callback that will be invoced after the new proxy contract has been successfully deployed and initialized.
    function createProxyWithCallback(
        address _singleton,
        bytes memory initializer,
        uint256 saltNonce,
        IProxyCreationCallback callback
    ) public returns (GnosisSafeProxy proxy) {
        uint256 saltNonceWithCallback = uint256(keccak256(abi.encodePacked(saltNonce, callback)));
        proxy = createProxyWithNonce(_singleton, initializer, saltNonceWithCallback);
        if (address(callback) != address(0)) callback.proxyCreated(proxy, _singleton, initializer, saltNonce);
    }

    /// @dev Allows to get the address for a new proxy contact created via `createProxyWithNonce`
    ///      This method is only meant for address calculation purpose when you use an initializer that would revert,
    ///      therefore the response is returned with a revert. When calling this method set `from` to the address of the proxy factory.
    /// @param _singleton Address of singleton contract.
    /// @param initializer Payload for message call sent to new proxy contract.
    /// @param saltNonce Nonce that will be used to generate the salt to calculate the address of the new proxy contract.
    function calculateCreateProxyWithNonceAddress(
        address _singleton,
        bytes calldata initializer,
        uint256 saltNonce
    ) external returns (GnosisSafeProxy proxy) {
        proxy = deployProxyWithNonce(_singleton, initializer, saltNonce);
        revert(string(abi.encodePacked(proxy)));
    }
}

interface IProxyCreationCallback {
    function proxyCreated(
        GnosisSafeProxy proxy,
        address _singleton,
        bytes calldata initializer,
        uint256 saltNonce
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/transparent/TransparentUpgradeableProxy.sol)
pragma solidity ^0.8.0;
import "../ERC1967/ERC1967Proxy.sol";
/**
 * @dev Interface for {TransparentUpgradeableProxy}. In order to implement transparency, {TransparentUpgradeableProxy}
 * does not implement this interface directly, and some of its functions are implemented by an internal dispatch
 * mechanism. The compiler is unaware that these functions are implemented by {TransparentUpgradeableProxy} and will not
 * include them in the ABI so this interface must be used to interact with it.
 */
interface ITransparentUpgradeableProxy is IERC1967 {
    function admin() external view returns (address);
    function implementation() external view returns (address);
    function changeAdmin(address) external;
    function upgradeTo(address) external;
    function upgradeToAndCall(address, bytes memory) external payable;
}
/**
 * @dev This contract implements a proxy that is upgradeable by an admin.
 *
 * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
 * clashing], which can potentially be used in an attack, this contract uses the
 * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
 * things that go hand in hand:
 *
 * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
 * that call matches one of the admin functions exposed by the proxy itself.
 * 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the
 * implementation. If the admin tries to call a function on the implementation it will fail with an error that says
 * "admin cannot fallback to proxy target".
 *
 * These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing
 * the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due
 * to sudden errors when trying to call a function from the proxy implementation.
 *
 * Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way,
 * you should think of the `ProxyAdmin` instance as the real administrative interface of your proxy.
 *
 * NOTE: The real interface of this proxy is that defined in `ITransparentUpgradeableProxy`. This contract does not
 * inherit from that interface, and instead the admin functions are implicitly implemented using a custom dispatch
 * mechanism in `_fallback`. Consequently, the compiler will not produce an ABI for this contract. This is necessary to
 * fully implement transparency without decoding reverts caused by selector clashes between the proxy and the
 * implementation.
 *
 * WARNING: It is not recommended to extend this contract to add additional external functions. If you do so, the compiler
 * will not check that there are no selector conflicts, due to the note above. A selector clash between any new function
 * and the functions declared in {ITransparentUpgradeableProxy} will be resolved in favor of the new one. This could
 * render the admin operations inaccessible, which could prevent upgradeability. Transparency may also be compromised.
 */
contract TransparentUpgradeableProxy is ERC1967Proxy {
    /**
     * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
     * optionally initialized with `_data` as explained in {ERC1967Proxy-constructor}.
     */
    constructor(address _logic, address admin_, bytes memory _data) payable ERC1967Proxy(_logic, _data) {
        _changeAdmin(admin_);
    }
    /**
     * @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
     *
     * CAUTION: This modifier is deprecated, as it could cause issues if the modified function has arguments, and the
     * implementation provides a function with the same selector.
     */
    modifier ifAdmin() {
        if (msg.sender == _getAdmin()) {
            _;
        } else {
            _fallback();
        }
    }
    /**
     * @dev If caller is the admin process the call internally, otherwise transparently fallback to the proxy behavior
     */
    function _fallback() internal virtual override {
        if (msg.sender == _getAdmin()) {
            bytes memory ret;
            bytes4 selector = msg.sig;
            if (selector == ITransparentUpgradeableProxy.upgradeTo.selector) {
                ret = _dispatchUpgradeTo();
            } else if (selector == ITransparentUpgradeableProxy.upgradeToAndCall.selector) {
                ret = _dispatchUpgradeToAndCall();
            } else if (selector == ITransparentUpgradeableProxy.changeAdmin.selector) {
                ret = _dispatchChangeAdmin();
            } else if (selector == ITransparentUpgradeableProxy.admin.selector) {
                ret = _dispatchAdmin();
            } else if (selector == ITransparentUpgradeableProxy.implementation.selector) {
                ret = _dispatchImplementation();
            } else {
                revert("TransparentUpgradeableProxy: admin cannot fallback to proxy target");
            }
            assembly {
                return(add(ret, 0x20), mload(ret))
            }
        } else {
            super._fallback();
        }
    }
    /**
     * @dev Returns the current admin.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function _dispatchAdmin() private returns (bytes memory) {
        _requireZeroValue();
        address admin = _getAdmin();
        return abi.encode(admin);
    }
    /**
     * @dev Returns the current implementation.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
     */
    function _dispatchImplementation() private returns (bytes memory) {
        _requireZeroValue();
        address implementation = _implementation();
        return abi.encode(implementation);
    }
    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _dispatchChangeAdmin() private returns (bytes memory) {
        _requireZeroValue();
        address newAdmin = abi.decode(msg.data[4:], (address));
        _changeAdmin(newAdmin);
        return "";
    }
    /**
     * @dev Upgrade the implementation of the proxy.
     */
    function _dispatchUpgradeTo() private returns (bytes memory) {
        _requireZeroValue();
        address newImplementation = abi.decode(msg.data[4:], (address));
        _upgradeToAndCall(newImplementation, bytes(""), false);
        return "";
    }
    /**
     * @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified
     * by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the
     * proxied contract.
     */
    function _dispatchUpgradeToAndCall() private returns (bytes memory) {
        (address newImplementation, bytes memory data) = abi.decode(msg.data[4:], (address, bytes));
        _upgradeToAndCall(newImplementation, data, true);
        return "";
    }
    /**
     * @dev Returns the current admin.
     *
     * CAUTION: This function is deprecated. Use {ERC1967Upgrade-_getAdmin} instead.
     */
    function _admin() internal view virtual returns (address) {
        return _getAdmin();
    }
    /**
     * @dev To keep this contract fully transparent, all `ifAdmin` functions must be payable. This helper is here to
     * emulate some proxy functions being non-payable while still allowing value to pass through.
     */
    function _requireZeroValue() private {
        require(msg.value == 0);
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/ERC1967/ERC1967Proxy.sol)
pragma solidity ^0.8.0;
import "../Proxy.sol";
import "./ERC1967Upgrade.sol";
/**
 * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
 * implementation address that can be changed. This address is stored in storage in the location specified by
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
 * implementation behind the proxy.
 */
contract ERC1967Proxy is Proxy, ERC1967Upgrade {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
     *
     * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
     * function call, and allows initializing the storage of the proxy like a Solidity constructor.
     */
    constructor(address _logic, bytes memory _data) payable {
        _upgradeToAndCall(_logic, _data, false);
    }
    /**
     * @dev Returns the current implementation address.
     */
    function _implementation() internal view virtual override returns (address impl) {
        return ERC1967Upgrade._getImplementation();
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())
            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())
            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }
    /**
     * @dev This is a virtual function that should be overridden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);
    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }
    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }
    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive() external payable virtual {
        _fallback();
    }
    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overridden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/ERC1967/ERC1967Upgrade.sol)
pragma solidity ^0.8.2;
import "../beacon/IBeacon.sol";
import "../../interfaces/IERC1967.sol";
import "../../interfaces/draft-IERC1822.sol";
import "../../utils/Address.sol";
import "../../utils/StorageSlot.sol";
/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 */
abstract contract ERC1967Upgrade is IERC1967 {
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }
    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }
    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }
    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(address newImplementation, bytes memory data, bool forceCall) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }
    }
    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(address newImplementation, bytes memory data, bool forceCall) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlot.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }
    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
    }
    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }
    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }
    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
    }
    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(Address.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            Address.isContract(IBeacon(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }
    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)
pragma solidity ^0.8.0;
/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeacon {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC1967.sol)
pragma solidity ^0.8.0;
/**
 * @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
 *
 * _Available since v4.8.3._
 */
interface IERC1967 {
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);
    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);
    /**
     * @dev Emitted when the beacon is changed.
     */
    event BeaconUpgraded(address indexed beacon);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)
pragma solidity ^0.8.0;
/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822Proxiable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.
        return account.code.length > 0;
    }
    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }
    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }
    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.
pragma solidity ^0.8.0;
/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```solidity
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._
 * _Available since v4.9 for `string`, `bytes`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }
    struct BooleanSlot {
        bool value;
    }
    struct Bytes32Slot {
        bytes32 value;
    }
    struct Uint256Slot {
        uint256 value;
    }
    struct StringSlot {
        string value;
    }
    struct BytesSlot {
        bytes value;
    }
    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `StringSlot` with member `value` located at `slot`.
     */
    function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
     */
    function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }
    /**
     * @dev Returns an `BytesSlot` with member `value` located at `slot`.
     */
    function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
    /**
     * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
     */
    function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }
    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }
    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }
    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }
    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }
    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(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");
        _transferOwnership(newOwner);
    }
    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.2;
import "../../utils/AddressUpgradeable.sol";
/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;
    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;
    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);
    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }
    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }
    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }
    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized != type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }
    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }
    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);
    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);
    bool private _paused;
    /**
     * @dev Initializes the contract in unpaused state.
     */
    function __Pausable_init() internal onlyInitializing {
        __Pausable_init_unchained();
    }
    function __Pausable_init_unchained() internal onlyInitializing {
        _paused = false;
    }
    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }
    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }
    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }
    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }
    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }
    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }
    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuardUpgradeable is Initializable {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.
    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;
    uint256 private _status;
    function __ReentrancyGuard_init() internal onlyInitializing {
        __ReentrancyGuard_init_unchained();
    }
    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        _status = _NOT_ENTERED;
    }
    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }
    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }
    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.
        return account.code.length > 0;
    }
    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }
    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }
    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }
    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
import {IScrollMessenger} from "../libraries/IScrollMessenger.sol";
interface IL1ScrollMessenger is IScrollMessenger {
    /**********
     * Events *
     **********/
    /// @notice Emitted when the maximum number of times each message can be replayed is updated.
    /// @param oldMaxReplayTimes The old maximum number of times each message can be replayed.
    /// @param newMaxReplayTimes The new maximum number of times each message can be replayed.
    event UpdateMaxReplayTimes(uint256 oldMaxReplayTimes, uint256 newMaxReplayTimes);
    /***********
     * Structs *
     ***********/
    struct L2MessageProof {
        // The index of the batch where the message belongs to.
        uint256 batchIndex;
        // Concatenation of merkle proof for withdraw merkle trie.
        bytes merkleProof;
    }
    /*****************************
     * Public Mutating Functions *
     *****************************/
    /// @notice Relay a L2 => L1 message with message proof.
    /// @param from The address of the sender of the message.
    /// @param to The address of the recipient of the message.
    /// @param value The msg.value passed to the message call.
    /// @param nonce The nonce of the message to avoid replay attack.
    /// @param message The content of the message.
    /// @param proof The proof used to verify the correctness of the transaction.
    function relayMessageWithProof(
        address from,
        address to,
        uint256 value,
        uint256 nonce,
        bytes memory message,
        L2MessageProof memory proof
    ) external;
    /// @notice Replay an existing message.
    /// @param from The address of the sender of the message.
    /// @param to The address of the recipient of the message.
    /// @param value The msg.value passed to the message call.
    /// @param messageNonce The nonce for the message to replay.
    /// @param message The content of the message.
    /// @param newGasLimit New gas limit to be used for this message.
    /// @param refundAddress The address of account who will receive the refunded fee.
    function replayMessage(
        address from,
        address to,
        uint256 value,
        uint256 messageNonce,
        bytes memory message,
        uint32 newGasLimit,
        address refundAddress
    ) external payable;
    /// @notice Drop a skipped message.
    /// @param from The address of the sender of the message.
    /// @param to The address of the recipient of the message.
    /// @param value The msg.value passed to the message call.
    /// @param messageNonce The nonce for the message to drop.
    /// @param message The content of the message.
    function dropMessage(
        address from,
        address to,
        uint256 value,
        uint256 messageNonce,
        bytes memory message
    ) external;
}
// SPDX-License-Identifier: MIT
pragma solidity =0.8.16;
import {IScrollChain} from "./rollup/IScrollChain.sol";
import {IL1MessageQueue} from "./rollup/IL1MessageQueue.sol";
import {IL1ScrollMessenger} from "./IL1ScrollMessenger.sol";
import {ScrollConstants} from "../libraries/constants/ScrollConstants.sol";
import {IScrollMessenger} from "../libraries/IScrollMessenger.sol";
import {ScrollMessengerBase} from "../libraries/ScrollMessengerBase.sol";
import {WithdrawTrieVerifier} from "../libraries/verifier/WithdrawTrieVerifier.sol";
import {IMessageDropCallback} from "../libraries/callbacks/IMessageDropCallback.sol";
// solhint-disable avoid-low-level-calls
// solhint-disable not-rely-on-time
// solhint-disable reason-string
/// @title L1ScrollMessenger
/// @notice The `L1ScrollMessenger` contract can:
///
/// 1. send messages from layer 1 to layer 2;
/// 2. relay messages from layer 2 layer 1;
/// 3. replay failed message by replacing the gas limit;
/// 4. drop expired message due to sequencer problems.
///
/// @dev All deposited Ether (including `WETH` deposited throng `L1WETHGateway`) will locked in
/// this contract.
contract L1ScrollMessenger is ScrollMessengerBase, IL1ScrollMessenger {
    /*************
     * Constants *
     *************/
    /// @notice The address of Rollup contract.
    address public immutable rollup;
    /// @notice The address of L1MessageQueue contract.
    address public immutable messageQueue;
    /***********
     * Structs *
     ***********/
    struct ReplayState {
        // The number of replayed times.
        uint128 times;
        // The queue index of lastest replayed one. If it is zero, it means the message has not been replayed.
        uint128 lastIndex;
    }
    /*************
     * Variables *
     *************/
    /// @notice Mapping from L1 message hash to the timestamp when the message is sent.
    mapping(bytes32 => uint256) public messageSendTimestamp;
    /// @notice Mapping from L2 message hash to a boolean value indicating if the message has been successfully executed.
    mapping(bytes32 => bool) public isL2MessageExecuted;
    /// @notice Mapping from L1 message hash to drop status.
    mapping(bytes32 => bool) public isL1MessageDropped;
    /// @dev The storage slot used as Rollup contract, which is deprecated now.
    address private __rollup;
    /// @dev The storage slot used as L1MessageQueue contract, which is deprecated now.
    address private __messageQueue;
    /// @notice The maximum number of times each L1 message can be replayed.
    uint256 public maxReplayTimes;
    /// @notice Mapping from L1 message hash to replay state.
    mapping(bytes32 => ReplayState) public replayStates;
    /// @notice Mapping from queue index to previous replay queue index.
    ///
    /// @dev If a message `x` was replayed 3 times with index `q1`, `q2` and `q3`, the
    /// value of `prevReplayIndex` and `replayStates` will be `replayStates[hash(x)].lastIndex = q3`,
    /// `replayStates[hash(x)].times = 3`, `prevReplayIndex[q3] = q2`, `prevReplayIndex[q2] = q1`,
    /// `prevReplayIndex[q1] = x` and `prevReplayIndex[x]=nil`.
    ///
    /// @dev The index `x` that `prevReplayIndex[x]=nil` is used as the termination of the list.
    /// Usually we use `0` to represent `nil`, but we cannot distinguish it with the first message
    /// with index zero. So a nonzero offset `1` is added to the value of `prevReplayIndex[x]` to
    /// avoid such situation.
    mapping(uint256 => uint256) public prevReplayIndex;
    /***************
     * Constructor *
     ***************/
    constructor(
        address _counterpart,
        address _rollup,
        address _messageQueue
    ) ScrollMessengerBase(_counterpart) {
        if (_rollup == address(0) || _messageQueue == address(0)) {
            revert ErrorZeroAddress();
        }
        _disableInitializers();
        rollup = _rollup;
        messageQueue = _messageQueue;
    }
    /// @notice Initialize the storage of L1ScrollMessenger.
    ///
    /// @dev The parameters `_counterpart`, `_rollup` and `_messageQueue` are no longer used.
    ///
    /// @param _counterpart The address of L2ScrollMessenger contract in L2.
    /// @param _feeVault The address of fee vault, which will be used to collect relayer fee.
    /// @param _rollup The address of ScrollChain contract.
    /// @param _messageQueue The address of L1MessageQueue contract.
    function initialize(
        address _counterpart,
        address _feeVault,
        address _rollup,
        address _messageQueue
    ) public initializer {
        ScrollMessengerBase.__ScrollMessengerBase_init(_counterpart, _feeVault);
        __rollup = _rollup;
        __messageQueue = _messageQueue;
        maxReplayTimes = 3;
        emit UpdateMaxReplayTimes(0, 3);
    }
    /*****************************
     * Public Mutating Functions *
     *****************************/
    /// @inheritdoc IScrollMessenger
    function sendMessage(
        address _to,
        uint256 _value,
        bytes memory _message,
        uint256 _gasLimit
    ) external payable override whenNotPaused {
        _sendMessage(_to, _value, _message, _gasLimit, _msgSender());
    }
    /// @inheritdoc IScrollMessenger
    function sendMessage(
        address _to,
        uint256 _value,
        bytes calldata _message,
        uint256 _gasLimit,
        address _refundAddress
    ) external payable override whenNotPaused {
        _sendMessage(_to, _value, _message, _gasLimit, _refundAddress);
    }
    /// @inheritdoc IL1ScrollMessenger
    function relayMessageWithProof(
        address _from,
        address _to,
        uint256 _value,
        uint256 _nonce,
        bytes memory _message,
        L2MessageProof memory _proof
    ) external override whenNotPaused notInExecution {
        bytes32 _xDomainCalldataHash = keccak256(_encodeXDomainCalldata(_from, _to, _value, _nonce, _message));
        require(!isL2MessageExecuted[_xDomainCalldataHash], "Message was already successfully executed");
        {
            require(IScrollChain(rollup).isBatchFinalized(_proof.batchIndex), "Batch is not finalized");
            bytes32 _messageRoot = IScrollChain(rollup).withdrawRoots(_proof.batchIndex);
            require(
                WithdrawTrieVerifier.verifyMerkleProof(_messageRoot, _xDomainCalldataHash, _nonce, _proof.merkleProof),
                "Invalid proof"
            );
        }
        // @note check more `_to` address to avoid attack in the future when we add more gateways.
        require(_to != messageQueue, "Forbid to call message queue");
        _validateTargetAddress(_to);
        // @note This usually will never happen, just in case.
        require(_from != xDomainMessageSender, "Invalid message sender");
        xDomainMessageSender = _from;
        (bool success, ) = _to.call{value: _value}(_message);
        // reset value to refund gas.
        xDomainMessageSender = ScrollConstants.DEFAULT_XDOMAIN_MESSAGE_SENDER;
        if (success) {
            isL2MessageExecuted[_xDomainCalldataHash] = true;
            emit RelayedMessage(_xDomainCalldataHash);
        } else {
            emit FailedRelayedMessage(_xDomainCalldataHash);
        }
    }
    /// @inheritdoc IL1ScrollMessenger
    function replayMessage(
        address _from,
        address _to,
        uint256 _value,
        uint256 _messageNonce,
        bytes memory _message,
        uint32 _newGasLimit,
        address _refundAddress
    ) external payable override whenNotPaused notInExecution {
        // We will use a different `queueIndex` for the replaced message. However, the original `queueIndex` or `nonce`
        // is encoded in the `_message`. We will check the `xDomainCalldata` on layer 2 to avoid duplicated execution.
        // So, only one message will succeed on layer 2. If one of the message is executed successfully, the other one
        // will revert with "Message was already successfully executed".
        bytes memory _xDomainCalldata = _encodeXDomainCalldata(_from, _to, _value, _messageNonce, _message);
        bytes32 _xDomainCalldataHash = keccak256(_xDomainCalldata);
        require(messageSendTimestamp[_xDomainCalldataHash] > 0, "Provided message has not been enqueued");
        // cannot replay dropped message
        require(!isL1MessageDropped[_xDomainCalldataHash], "Message already dropped");
        // compute and deduct the messaging fee to fee vault.
        uint256 _fee = IL1MessageQueue(messageQueue).estimateCrossDomainMessageFee(_newGasLimit);
        // charge relayer fee
        require(msg.value >= _fee, "Insufficient msg.value for fee");
        if (_fee > 0) {
            (bool _success, ) = feeVault.call{value: _fee}("");
            require(_success, "Failed to deduct the fee");
        }
        // enqueue the new transaction
        uint256 _nextQueueIndex = IL1MessageQueue(messageQueue).nextCrossDomainMessageIndex();
        IL1MessageQueue(messageQueue).appendCrossDomainMessage(counterpart, _newGasLimit, _xDomainCalldata);
        ReplayState memory _replayState = replayStates[_xDomainCalldataHash];
        // update the replayed message chain.
        unchecked {
            if (_replayState.lastIndex == 0) {
                // the message has not been replayed before.
                prevReplayIndex[_nextQueueIndex] = _messageNonce + 1;
            } else {
                prevReplayIndex[_nextQueueIndex] = _replayState.lastIndex + 1;
            }
        }
        _replayState.lastIndex = uint128(_nextQueueIndex);
        // update replay times
        require(_replayState.times < maxReplayTimes, "Exceed maximum replay times");
        unchecked {
            _replayState.times += 1;
        }
        replayStates[_xDomainCalldataHash] = _replayState;
        // refund fee to `_refundAddress`
        unchecked {
            uint256 _refund = msg.value - _fee;
            if (_refund > 0) {
                (bool _success, ) = _refundAddress.call{value: _refund}("");
                require(_success, "Failed to refund the fee");
            }
        }
    }
    /// @inheritdoc IL1ScrollMessenger
    function dropMessage(
        address _from,
        address _to,
        uint256 _value,
        uint256 _messageNonce,
        bytes memory _message
    ) external override whenNotPaused notInExecution {
        // The criteria for dropping a message:
        // 1. The message is a L1 message.
        // 2. The message has not been dropped before.
        // 3. the message and all of its replacement are finalized in L1.
        // 4. the message and all of its replacement are skipped.
        //
        // Possible denial of service attack:
        // + replayMessage is called every time someone want to drop the message.
        // + replayMessage is called so many times for a skipped message, thus results a long list.
        //
        // We limit the number of `replayMessage` calls of each message, which may solve the above problem.
        // check message exists
        bytes memory _xDomainCalldata = _encodeXDomainCalldata(_from, _to, _value, _messageNonce, _message);
        bytes32 _xDomainCalldataHash = keccak256(_xDomainCalldata);
        require(messageSendTimestamp[_xDomainCalldataHash] > 0, "Provided message has not been enqueued");
        // check message not dropped
        require(!isL1MessageDropped[_xDomainCalldataHash], "Message already dropped");
        // check message is finalized
        uint256 _lastIndex = replayStates[_xDomainCalldataHash].lastIndex;
        if (_lastIndex == 0) _lastIndex = _messageNonce;
        // check message is skipped and drop it.
        // @note If the list is very long, the message may never be dropped.
        while (true) {
            IL1MessageQueue(messageQueue).dropCrossDomainMessage(_lastIndex);
            _lastIndex = prevReplayIndex[_lastIndex];
            if (_lastIndex == 0) break;
            unchecked {
                _lastIndex = _lastIndex - 1;
            }
        }
        isL1MessageDropped[_xDomainCalldataHash] = true;
        // set execution context
        xDomainMessageSender = ScrollConstants.DROP_XDOMAIN_MESSAGE_SENDER;
        IMessageDropCallback(_from).onDropMessage{value: _value}(_message);
        // clear execution context
        xDomainMessageSender = ScrollConstants.DEFAULT_XDOMAIN_MESSAGE_SENDER;
    }
    /************************
     * Restricted Functions *
     ************************/
    /// @notice Update max replay times.
    /// @dev This function can only called by contract owner.
    /// @param _newMaxReplayTimes The new max replay times.
    function updateMaxReplayTimes(uint256 _newMaxReplayTimes) external onlyOwner {
        uint256 _oldMaxReplayTimes = maxReplayTimes;
        maxReplayTimes = _newMaxReplayTimes;
        emit UpdateMaxReplayTimes(_oldMaxReplayTimes, _newMaxReplayTimes);
    }
    /**********************
     * Internal Functions *
     **********************/
    function _sendMessage(
        address _to,
        uint256 _value,
        bytes memory _message,
        uint256 _gasLimit,
        address _refundAddress
    ) internal nonReentrant {
        // compute the actual cross domain message calldata.
        uint256 _messageNonce = IL1MessageQueue(messageQueue).nextCrossDomainMessageIndex();
        bytes memory _xDomainCalldata = _encodeXDomainCalldata(_msgSender(), _to, _value, _messageNonce, _message);
        // compute and deduct the messaging fee to fee vault.
        uint256 _fee = IL1MessageQueue(messageQueue).estimateCrossDomainMessageFee(_gasLimit);
        require(msg.value >= _fee + _value, "Insufficient msg.value");
        if (_fee > 0) {
            (bool _success, ) = feeVault.call{value: _fee}("");
            require(_success, "Failed to deduct the fee");
        }
        // append message to L1MessageQueue
        IL1MessageQueue(messageQueue).appendCrossDomainMessage(counterpart, _gasLimit, _xDomainCalldata);
        // record the message hash for future use.
        bytes32 _xDomainCalldataHash = keccak256(_xDomainCalldata);
        // normally this won't happen, since each message has different nonce, but just in case.
        require(messageSendTimestamp[_xDomainCalldataHash] == 0, "Duplicated message");
        messageSendTimestamp[_xDomainCalldataHash] = block.timestamp;
        emit SentMessage(_msgSender(), _to, _value, _messageNonce, _gasLimit, _message);
        // refund fee to `_refundAddress`
        unchecked {
            uint256 _refund = msg.value - _fee - _value;
            if (_refund > 0) {
                (bool _success, ) = _refundAddress.call{value: _refund}("");
                require(_success, "Failed to refund the fee");
            }
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
interface IL1MessageQueue {
    /**********
     * Events *
     **********/
    /// @notice Emitted when a new L1 => L2 transaction is appended to the queue.
    /// @param sender The address of account who initiates the transaction.
    /// @param target The address of account who will receive the transaction.
    /// @param value The value passed with the transaction.
    /// @param queueIndex The index of this transaction in the queue.
    /// @param gasLimit Gas limit required to complete the message relay on L2.
    /// @param data The calldata of the transaction.
    event QueueTransaction(
        address indexed sender,
        address indexed target,
        uint256 value,
        uint64 queueIndex,
        uint256 gasLimit,
        bytes data
    );
    /// @notice Emitted when some L1 => L2 transactions are included in L1.
    /// @param startIndex The start index of messages popped.
    /// @param count The number of messages popped.
    /// @param skippedBitmap A bitmap indicates whether a message is skipped.
    event DequeueTransaction(uint256 startIndex, uint256 count, uint256 skippedBitmap);
    /// @notice Emitted when a message is dropped from L1.
    /// @param index The index of message dropped.
    event DropTransaction(uint256 index);
    /// @notice Emitted when owner updates gas oracle contract.
    /// @param _oldGasOracle The address of old gas oracle contract.
    /// @param _newGasOracle The address of new gas oracle contract.
    event UpdateGasOracle(address indexed _oldGasOracle, address indexed _newGasOracle);
    /// @notice Emitted when owner updates max gas limit.
    /// @param _oldMaxGasLimit The old max gas limit.
    /// @param _newMaxGasLimit The new max gas limit.
    event UpdateMaxGasLimit(uint256 _oldMaxGasLimit, uint256 _newMaxGasLimit);
    /**********
     * Errors *
     **********/
    /// @dev Thrown when the given address is `address(0)`.
    error ErrorZeroAddress();
    /*************************
     * Public View Functions *
     *************************/
    /// @notice The start index of all pending inclusion messages.
    function pendingQueueIndex() external view returns (uint256);
    /// @notice Return the index of next appended message.
    /// @dev Also the total number of appended messages.
    function nextCrossDomainMessageIndex() external view returns (uint256);
    /// @notice Return the message of in `queueIndex`.
    /// @param queueIndex The index to query.
    function getCrossDomainMessage(uint256 queueIndex) external view returns (bytes32);
    /// @notice Return the amount of ETH should pay for cross domain message.
    /// @param gasLimit Gas limit required to complete the message relay on L2.
    function estimateCrossDomainMessageFee(uint256 gasLimit) external view returns (uint256);
    /// @notice Return the amount of intrinsic gas fee should pay for cross domain message.
    /// @param _calldata The calldata of L1-initiated transaction.
    function calculateIntrinsicGasFee(bytes calldata _calldata) external view returns (uint256);
    /// @notice Return the hash of a L1 message.
    /// @param sender The address of sender.
    /// @param queueIndex The queue index of this message.
    /// @param value The amount of Ether transfer to target.
    /// @param target The address of target.
    /// @param gasLimit The gas limit provided.
    /// @param data The calldata passed to target address.
    function computeTransactionHash(
        address sender,
        uint256 queueIndex,
        uint256 value,
        address target,
        uint256 gasLimit,
        bytes calldata data
    ) external view returns (bytes32);
    /// @notice Return whether the message is skipped.
    /// @param queueIndex The queue index of the message to check.
    function isMessageSkipped(uint256 queueIndex) external view returns (bool);
    /// @notice Return whether the message is dropped.
    /// @param queueIndex The queue index of the message to check.
    function isMessageDropped(uint256 queueIndex) external view returns (bool);
    /*****************************
     * Public Mutating Functions *
     *****************************/
    /// @notice Append a L1 to L2 message into this contract.
    /// @param target The address of target contract to call in L2.
    /// @param gasLimit The maximum gas should be used for relay this message in L2.
    /// @param data The calldata passed to target contract.
    function appendCrossDomainMessage(
        address target,
        uint256 gasLimit,
        bytes calldata data
    ) external;
    /// @notice Append an enforced transaction to this contract.
    /// @dev The address of sender should be an EOA.
    /// @param sender The address of sender who will initiate this transaction in L2.
    /// @param target The address of target contract to call in L2.
    /// @param value The value passed
    /// @param gasLimit The maximum gas should be used for this transaction in L2.
    /// @param data The calldata passed to target contract.
    function appendEnforcedTransaction(
        address sender,
        address target,
        uint256 value,
        uint256 gasLimit,
        bytes calldata data
    ) external;
    /// @notice Pop finalized messages from queue.
    ///
    /// @dev We can pop at most 256 messages each time. And if the message is not skipped,
    ///      the corresponding entry will be cleared.
    ///
    /// @param startIndex The start index to pop.
    /// @param count The number of messages to pop.
    /// @param skippedBitmap A bitmap indicates whether a message is skipped.
    function popCrossDomainMessage(
        uint256 startIndex,
        uint256 count,
        uint256 skippedBitmap
    ) external;
    /// @notice Drop a skipped message from the queue.
    function dropCrossDomainMessage(uint256 index) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
interface IScrollChain {
    /**********
     * Events *
     **********/
    /// @notice Emitted when a new batch is committed.
    /// @param batchIndex The index of the batch.
    /// @param batchHash The hash of the batch.
    event CommitBatch(uint256 indexed batchIndex, bytes32 indexed batchHash);
    /// @notice revert a pending batch.
    /// @param batchIndex The index of the batch.
    /// @param batchHash The hash of the batch
    event RevertBatch(uint256 indexed batchIndex, bytes32 indexed batchHash);
    /// @notice Emitted when a batch is finalized.
    /// @param batchIndex The index of the batch.
    /// @param batchHash The hash of the batch
    /// @param stateRoot The state root on layer 2 after this batch.
    /// @param withdrawRoot The merkle root on layer2 after this batch.
    event FinalizeBatch(uint256 indexed batchIndex, bytes32 indexed batchHash, bytes32 stateRoot, bytes32 withdrawRoot);
    /**********
     * Errors *
     **********/
    /// @dev Thrown when the given address is `address(0)`.
    error ErrorZeroAddress();
    /*************************
     * Public View Functions *
     *************************/
    /// @notice The latest finalized batch index.
    function lastFinalizedBatchIndex() external view returns (uint256);
    /// @notice Return the batch hash of a committed batch.
    /// @param batchIndex The index of the batch.
    function committedBatches(uint256 batchIndex) external view returns (bytes32);
    /// @notice Return the state root of a committed batch.
    /// @param batchIndex The index of the batch.
    function finalizedStateRoots(uint256 batchIndex) external view returns (bytes32);
    /// @notice Return the message root of a committed batch.
    /// @param batchIndex The index of the batch.
    function withdrawRoots(uint256 batchIndex) external view returns (bytes32);
    /// @notice Return whether the batch is finalized by batch index.
    /// @param batchIndex The index of the batch.
    function isBatchFinalized(uint256 batchIndex) external view returns (bool);
    /*****************************
     * Public Mutating Functions *
     *****************************/
    /// @notice Commit a batch of transactions on layer 1.
    ///
    /// @param version The version of current batch.
    /// @param parentBatchHeader The header of parent batch, see the comments of `BatchHeaderV0Codec`.
    /// @param chunks The list of encoded chunks, see the comments of `ChunkCodec`.
    /// @param skippedL1MessageBitmap The bitmap indicates whether each L1 message is skipped or not.
    function commitBatch(
        uint8 version,
        bytes calldata parentBatchHeader,
        bytes[] memory chunks,
        bytes calldata skippedL1MessageBitmap
    ) external;
    /// @notice Revert a pending batch.
    /// @dev one can only revert unfinalized batches.
    /// @param batchHeader The header of current batch, see the encoding in comments of `commitBatch`.
    /// @param count The number of subsequent batches to revert, including current batch.
    function revertBatch(bytes calldata batchHeader, uint256 count) external;
    /// @notice Finalize a committed batch on layer 1.
    /// @param batchHeader The header of current batch, see the encoding in comments of `commitBatch.
    /// @param prevStateRoot The state root of parent batch.
    /// @param postStateRoot The state root of current batch.
    /// @param withdrawRoot The withdraw trie root of current batch.
    /// @param aggrProof The aggregation proof for current batch.
    function finalizeBatchWithProof(
        bytes calldata batchHeader,
        bytes32 prevStateRoot,
        bytes32 postStateRoot,
        bytes32 withdrawRoot,
        bytes calldata aggrProof
    ) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
interface IMessageDropCallback {
    function onDropMessage(bytes memory message) external payable;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
library ScrollConstants {
    /// @notice The address of default cross chain message sender.
    address internal constant DEFAULT_XDOMAIN_MESSAGE_SENDER = address(1);
    /// @notice The address for dropping message.
    /// @dev The first 20 bytes of keccak("drop")
    address internal constant DROP_XDOMAIN_MESSAGE_SENDER = 0x6f297C61B5C92eF107fFD30CD56AFFE5A273e841;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
interface IScrollMessenger {
    /**********
     * Events *
     **********/
    /// @notice Emitted when a cross domain message is sent.
    /// @param sender The address of the sender who initiates the message.
    /// @param target The address of target contract to call.
    /// @param value The amount of value passed to the target contract.
    /// @param messageNonce The nonce of the message.
    /// @param gasLimit The optional gas limit passed to L1 or L2.
    /// @param message The calldata passed to the target contract.
    event SentMessage(
        address indexed sender,
        address indexed target,
        uint256 value,
        uint256 messageNonce,
        uint256 gasLimit,
        bytes message
    );
    /// @notice Emitted when a cross domain message is relayed successfully.
    /// @param messageHash The hash of the message.
    event RelayedMessage(bytes32 indexed messageHash);
    /// @notice Emitted when a cross domain message is failed to relay.
    /// @param messageHash The hash of the message.
    event FailedRelayedMessage(bytes32 indexed messageHash);
    /**********
     * Errors *
     **********/
    /// @dev Thrown when the given address is `address(0)`.
    error ErrorZeroAddress();
    /*************************
     * Public View Functions *
     *************************/
    /// @notice Return the sender of a cross domain message.
    function xDomainMessageSender() external view returns (address);
    /*****************************
     * Public Mutating Functions *
     *****************************/
    /// @notice Send cross chain message from L1 to L2 or L2 to L1.
    /// @param target The address of account who receive the message.
    /// @param value The amount of ether passed when call target contract.
    /// @param message The content of the message.
    /// @param gasLimit Gas limit required to complete the message relay on corresponding chain.
    function sendMessage(
        address target,
        uint256 value,
        bytes calldata message,
        uint256 gasLimit
    ) external payable;
    /// @notice Send cross chain message from L1 to L2 or L2 to L1.
    /// @param target The address of account who receive the message.
    /// @param value The amount of ether passed when call target contract.
    /// @param message The content of the message.
    /// @param gasLimit Gas limit required to complete the message relay on corresponding chain.
    /// @param refundAddress The address of account who will receive the refunded fee.
    function sendMessage(
        address target,
        uint256 value,
        bytes calldata message,
        uint256 gasLimit,
        address refundAddress
    ) external payable;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
import {OwnableUpgradeable} from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import {PausableUpgradeable} from "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol";
import {ReentrancyGuardUpgradeable} from "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import {ScrollConstants} from "./constants/ScrollConstants.sol";
import {IScrollMessenger} from "./IScrollMessenger.sol";
// solhint-disable var-name-mixedcase
abstract contract ScrollMessengerBase is
    OwnableUpgradeable,
    PausableUpgradeable,
    ReentrancyGuardUpgradeable,
    IScrollMessenger
{
    /**********
     * Events *
     **********/
    /// @notice Emitted when owner updates fee vault contract.
    /// @param _oldFeeVault The address of old fee vault contract.
    /// @param _newFeeVault The address of new fee vault contract.
    event UpdateFeeVault(address _oldFeeVault, address _newFeeVault);
    /*************
     * Constants *
     *************/
    /// @notice The address of counterpart ScrollMessenger contract in L1/L2.
    address public immutable counterpart;
    /*************
     * Variables *
     *************/
    /// @notice See {IScrollMessenger-xDomainMessageSender}
    address public override xDomainMessageSender;
    /// @dev The storage slot used as counterpart ScrollMessenger contract, which is deprecated now.
    address private __counterpart;
    /// @notice The address of fee vault, collecting cross domain messaging fee.
    address public feeVault;
    /// @dev The storage slot used as ETH rate limiter contract, which is deprecated now.
    address private __rateLimiter;
    /// @dev The storage slots for future usage.
    uint256[46] private __gap;
    /**********************
     * Function Modifiers *
     **********************/
    modifier notInExecution() {
        require(
            xDomainMessageSender == ScrollConstants.DEFAULT_XDOMAIN_MESSAGE_SENDER,
            "Message is already in execution"
        );
        _;
    }
    /***************
     * Constructor *
     ***************/
    constructor(address _counterpart) {
        if (_counterpart == address(0)) {
            revert ErrorZeroAddress();
        }
        counterpart = _counterpart;
    }
    function __ScrollMessengerBase_init(address, address _feeVault) internal onlyInitializing {
        OwnableUpgradeable.__Ownable_init();
        PausableUpgradeable.__Pausable_init();
        ReentrancyGuardUpgradeable.__ReentrancyGuard_init();
        // initialize to a nonzero value
        xDomainMessageSender = ScrollConstants.DEFAULT_XDOMAIN_MESSAGE_SENDER;
        if (_feeVault != address(0)) {
            feeVault = _feeVault;
        }
    }
    // make sure only owner can send ether to messenger to avoid possible user fund loss.
    receive() external payable onlyOwner {}
    /************************
     * Restricted Functions *
     ************************/
    /// @notice Update fee vault contract.
    /// @dev This function can only called by contract owner.
    /// @param _newFeeVault The address of new fee vault contract.
    function updateFeeVault(address _newFeeVault) external onlyOwner {
        address _oldFeeVault = feeVault;
        feeVault = _newFeeVault;
        emit UpdateFeeVault(_oldFeeVault, _newFeeVault);
    }
    /// @notice Pause the contract
    /// @dev This function can only called by contract owner.
    /// @param _status The pause status to update.
    function setPause(bool _status) external onlyOwner {
        if (_status) {
            _pause();
        } else {
            _unpause();
        }
    }
    /**********************
     * Internal Functions *
     **********************/
    /// @dev Internal function to generate the correct cross domain calldata for a message.
    /// @param _sender Message sender address.
    /// @param _target Target contract address.
    /// @param _value The amount of ETH pass to the target.
    /// @param _messageNonce Nonce for the provided message.
    /// @param _message Message to send to the target.
    /// @return ABI encoded cross domain calldata.
    function _encodeXDomainCalldata(
        address _sender,
        address _target,
        uint256 _value,
        uint256 _messageNonce,
        bytes memory _message
    ) internal pure returns (bytes memory) {
        return
            abi.encodeWithSignature(
                "relayMessage(address,address,uint256,uint256,bytes)",
                _sender,
                _target,
                _value,
                _messageNonce,
                _message
            );
    }
    /// @dev Internal function to check whether the `_target` address is allowed to avoid attack.
    /// @param _target The address of target address to check.
    function _validateTargetAddress(address _target) internal view {
        // @note check more `_target` address to avoid attack in the future when we add more external contracts.
        require(_target != address(this), "Forbid to call self");
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
// solhint-disable no-inline-assembly
library WithdrawTrieVerifier {
    /// @dev Verify the merkle proof given root, leaf node and proof.
    ///
    /// Vulnerability:
    ///   The initially provided message hash can be hashed with the first hash of the proof,
    ///   thereby giving an intermediate node of the trie. This can then be used with a shortened
    ///   proof to pass the verification, which may lead to replayability.
    ///
    ///   However, it is designed to verify the withdraw trie in `L2MessageQueue`. The `_hash` given
    ///   in the parameter is always a leaf node. So we assume the length of proof is correct and
    ///   cannot be shortened.
    /// @param _root The expected root node hash of the withdraw trie.
    /// @param _hash The leaf node hash of the withdraw trie.
    /// @param _nonce The index of the leaf node from left to right, starting from 0.
    /// @param _proof The concatenated merkle proof verified the leaf node.
    function verifyMerkleProof(
        bytes32 _root,
        bytes32 _hash,
        uint256 _nonce,
        bytes memory _proof
    ) internal pure returns (bool) {
        require(_proof.length % 32 == 0, "Invalid proof");
        uint256 _length = _proof.length / 32;
        for (uint256 i = 0; i < _length; i++) {
            bytes32 item;
            assembly {
                item := mload(add(add(_proof, 0x20), mul(i, 0x20)))
            }
            if (_nonce % 2 == 0) {
                _hash = _efficientHash(_hash, item);
            } else {
                _hash = _efficientHash(item, _hash);
            }
            _nonce /= 2;
        }
        return _hash == _root;
    }
    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }
    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }
    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }
    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }
    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }
    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(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");
        _transferOwnership(newOwner);
    }
    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.2;
import "../../utils/AddressUpgradeable.sol";
/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;
    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;
    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);
    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }
    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }
    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }
    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized != type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }
    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }
    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.
        return account.code.length > 0;
    }
    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }
    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }
    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }
    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }
    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/BitMaps.sol)
pragma solidity ^0.8.0;
/**
 * @dev Library for managing uint256 to bool mapping in a compact and efficient way, providing the keys are sequential.
 * Largely inspired by Uniswap's https://github.com/Uniswap/merkle-distributor/blob/master/contracts/MerkleDistributor.sol[merkle-distributor].
 */
library BitMapsUpgradeable {
    struct BitMap {
        mapping(uint256 => uint256) _data;
    }
    /**
     * @dev Returns whether the bit at `index` is set.
     */
    function get(BitMap storage bitmap, uint256 index) internal view returns (bool) {
        uint256 bucket = index >> 8;
        uint256 mask = 1 << (index & 0xff);
        return bitmap._data[bucket] & mask != 0;
    }
    /**
     * @dev Sets the bit at `index` to the boolean `value`.
     */
    function setTo(BitMap storage bitmap, uint256 index, bool value) internal {
        if (value) {
            set(bitmap, index);
        } else {
            unset(bitmap, index);
        }
    }
    /**
     * @dev Sets the bit at `index`.
     */
    function set(BitMap storage bitmap, uint256 index) internal {
        uint256 bucket = index >> 8;
        uint256 mask = 1 << (index & 0xff);
        bitmap._data[bucket] |= mask;
    }
    /**
     * @dev Unsets the bit at `index`.
     */
    function unset(BitMap storage bitmap, uint256 index) internal {
        uint256 bucket = index >> 8;
        uint256 mask = 1 << (index & 0xff);
        bitmap._data[bucket] &= ~mask;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
interface IL1MessageQueue {
    /**********
     * Events *
     **********/
    /// @notice Emitted when a new L1 => L2 transaction is appended to the queue.
    /// @param sender The address of account who initiates the transaction.
    /// @param target The address of account who will receive the transaction.
    /// @param value The value passed with the transaction.
    /// @param queueIndex The index of this transaction in the queue.
    /// @param gasLimit Gas limit required to complete the message relay on L2.
    /// @param data The calldata of the transaction.
    event QueueTransaction(
        address indexed sender,
        address indexed target,
        uint256 value,
        uint64 queueIndex,
        uint256 gasLimit,
        bytes data
    );
    /// @notice Emitted when some L1 => L2 transactions are included in L1.
    /// @param startIndex The start index of messages popped.
    /// @param count The number of messages popped.
    /// @param skippedBitmap A bitmap indicates whether a message is skipped.
    event DequeueTransaction(uint256 startIndex, uint256 count, uint256 skippedBitmap);
    /// @notice Emitted when a message is dropped from L1.
    /// @param index The index of message dropped.
    event DropTransaction(uint256 index);
    /// @notice Emitted when owner updates gas oracle contract.
    /// @param _oldGasOracle The address of old gas oracle contract.
    /// @param _newGasOracle The address of new gas oracle contract.
    event UpdateGasOracle(address indexed _oldGasOracle, address indexed _newGasOracle);
    /// @notice Emitted when owner updates max gas limit.
    /// @param _oldMaxGasLimit The old max gas limit.
    /// @param _newMaxGasLimit The new max gas limit.
    event UpdateMaxGasLimit(uint256 _oldMaxGasLimit, uint256 _newMaxGasLimit);
    /**********
     * Errors *
     **********/
    /// @dev Thrown when the given address is `address(0)`.
    error ErrorZeroAddress();
    /*************************
     * Public View Functions *
     *************************/
    /// @notice The start index of all pending inclusion messages.
    function pendingQueueIndex() external view returns (uint256);
    /// @notice Return the index of next appended message.
    /// @dev Also the total number of appended messages.
    function nextCrossDomainMessageIndex() external view returns (uint256);
    /// @notice Return the message of in `queueIndex`.
    /// @param queueIndex The index to query.
    function getCrossDomainMessage(uint256 queueIndex) external view returns (bytes32);
    /// @notice Return the amount of ETH should pay for cross domain message.
    /// @param gasLimit Gas limit required to complete the message relay on L2.
    function estimateCrossDomainMessageFee(uint256 gasLimit) external view returns (uint256);
    /// @notice Return the amount of intrinsic gas fee should pay for cross domain message.
    /// @param _calldata The calldata of L1-initiated transaction.
    function calculateIntrinsicGasFee(bytes calldata _calldata) external view returns (uint256);
    /// @notice Return the hash of a L1 message.
    /// @param sender The address of sender.
    /// @param queueIndex The queue index of this message.
    /// @param value The amount of Ether transfer to target.
    /// @param target The address of target.
    /// @param gasLimit The gas limit provided.
    /// @param data The calldata passed to target address.
    function computeTransactionHash(
        address sender,
        uint256 queueIndex,
        uint256 value,
        address target,
        uint256 gasLimit,
        bytes calldata data
    ) external view returns (bytes32);
    /// @notice Return whether the message is skipped.
    /// @param queueIndex The queue index of the message to check.
    function isMessageSkipped(uint256 queueIndex) external view returns (bool);
    /// @notice Return whether the message is dropped.
    /// @param queueIndex The queue index of the message to check.
    function isMessageDropped(uint256 queueIndex) external view returns (bool);
    /*****************************
     * Public Mutating Functions *
     *****************************/
    /// @notice Append a L1 to L2 message into this contract.
    /// @param target The address of target contract to call in L2.
    /// @param gasLimit The maximum gas should be used for relay this message in L2.
    /// @param data The calldata passed to target contract.
    function appendCrossDomainMessage(
        address target,
        uint256 gasLimit,
        bytes calldata data
    ) external;
    /// @notice Append an enforced transaction to this contract.
    /// @dev The address of sender should be an EOA.
    /// @param sender The address of sender who will initiate this transaction in L2.
    /// @param target The address of target contract to call in L2.
    /// @param value The value passed
    /// @param gasLimit The maximum gas should be used for this transaction in L2.
    /// @param data The calldata passed to target contract.
    function appendEnforcedTransaction(
        address sender,
        address target,
        uint256 value,
        uint256 gasLimit,
        bytes calldata data
    ) external;
    /// @notice Pop finalized messages from queue.
    ///
    /// @dev We can pop at most 256 messages each time. And if the message is not skipped,
    ///      the corresponding entry will be cleared.
    ///
    /// @param startIndex The start index to pop.
    /// @param count The number of messages to pop.
    /// @param skippedBitmap A bitmap indicates whether a message is skipped.
    function popCrossDomainMessage(
        uint256 startIndex,
        uint256 count,
        uint256 skippedBitmap
    ) external;
    /// @notice Drop a skipped message from the queue.
    function dropCrossDomainMessage(uint256 index) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
import {IL1MessageQueue} from "./IL1MessageQueue.sol";
interface IL1MessageQueueWithGasPriceOracle is IL1MessageQueue {
    /**********
     * Events *
     **********/
    /// @notice Emitted when owner updates whitelist checker contract.
    /// @param _oldWhitelistChecker The address of old whitelist checker contract.
    /// @param _newWhitelistChecker The address of new whitelist checker contract.
    event UpdateWhitelistChecker(address indexed _oldWhitelistChecker, address indexed _newWhitelistChecker);
    /// @notice Emitted when current l2 base fee is updated.
    /// @param oldL2BaseFee The original l2 base fee before update.
    /// @param newL2BaseFee The current l2 base fee updated.
    event UpdateL2BaseFee(uint256 oldL2BaseFee, uint256 newL2BaseFee);
    /**********
     * Errors *
     **********/
    /// @dev Thrown when the caller is not whitelisted.
    error ErrorNotWhitelistedSender();
    /*************************
     * Public View Functions *
     *************************/
    /// @notice Return the latest known l2 base fee.
    function l2BaseFee() external view returns (uint256);
    /// @notice Return the address of whitelist checker contract.
    function whitelistChecker() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
interface IL2GasPriceOracle {
    /// @notice Return the latest known l2 base fee.
    function l2BaseFee() external view returns (uint256);
    /// @notice Return the address of whitelist contract.
    function whitelist() external view returns (address);
    /// @notice Estimate fee for cross chain message call.
    /// @param _gasLimit Gas limit required to complete the message relay on L2.
    function estimateCrossDomainMessageFee(uint256 _gasLimit) external view returns (uint256);
    /// @notice Estimate intrinsic gas fee for cross chain message call.
    /// @param _message The message to be relayed on L2.
    function calculateIntrinsicGasFee(bytes memory _message) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity =0.8.16;
import {OwnableUpgradeable} from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import {BitMapsUpgradeable} from "@openzeppelin/contracts-upgradeable/utils/structs/BitMapsUpgradeable.sol";
import {IL2GasPriceOracle} from "./IL2GasPriceOracle.sol";
import {IL1MessageQueue} from "./IL1MessageQueue.sol";
import {AddressAliasHelper} from "../../libraries/common/AddressAliasHelper.sol";
// solhint-disable no-empty-blocks
// solhint-disable no-inline-assembly
// solhint-disable reason-string
/// @title L1MessageQueue
/// @notice This contract will hold all L1 to L2 messages.
/// Each appended message is assigned with a unique and increasing `uint256` index.
contract L1MessageQueue is OwnableUpgradeable, IL1MessageQueue {
    using BitMapsUpgradeable for BitMapsUpgradeable.BitMap;
    /*************
     * Constants *
     *************/
    /// @notice The address of L1ScrollMessenger contract.
    address public immutable messenger;
    /// @notice The address of ScrollChain contract.
    address public immutable scrollChain;
    /// @notice The address EnforcedTxGateway contract.
    address public immutable enforcedTxGateway;
    /*************
     * Variables *
     *************/
    /// @dev The storage slot used as L1ScrollMessenger contract, which is deprecated now.
    address private __messenger;
    /// @dev The storage slot used as ScrollChain contract, which is deprecated now.
    address private __scrollChain;
    /// @dev The storage slot used as EnforcedTxGateway contract, which is deprecated now.
    address private __enforcedTxGateway;
    /// @notice The address of GasOracle contract.
    address public gasOracle;
    /// @notice The list of queued cross domain messages.
    bytes32[] public messageQueue;
    /// @inheritdoc IL1MessageQueue
    uint256 public pendingQueueIndex;
    /// @notice The max gas limit of L1 transactions.
    uint256 public maxGasLimit;
    /// @dev The bitmap for dropped messages, where `droppedMessageBitmap[i]` keeps the bits from `[i*256, (i+1)*256)`.
    BitMapsUpgradeable.BitMap private droppedMessageBitmap;
    /// @dev The bitmap for skipped messages, where `skippedMessageBitmap[i]` keeps the bits from `[i*256, (i+1)*256)`.
    mapping(uint256 => uint256) private skippedMessageBitmap;
    /// @dev The storage slots for future usage.
    uint256[41] private __gap;
    /**********************
     * Function Modifiers *
     **********************/
    modifier onlyMessenger() {
        require(_msgSender() == messenger, "Only callable by the L1ScrollMessenger");
        _;
    }
    /***************
     * Constructor *
     ***************/
    /// @notice Constructor for `L1MessageQueue` implementation contract.
    ///
    /// @param _messenger The address of `L1ScrollMessenger` contract.
    /// @param _scrollChain The address of `ScrollChain` contract.
    /// @param _enforcedTxGateway The address of `EnforcedTxGateway` contract.
    constructor(
        address _messenger,
        address _scrollChain,
        address _enforcedTxGateway
    ) {
        if (_messenger == address(0) || _scrollChain == address(0) || _enforcedTxGateway == address(0)) {
            revert ErrorZeroAddress();
        }
        _disableInitializers();
        messenger = _messenger;
        scrollChain = _scrollChain;
        enforcedTxGateway = _enforcedTxGateway;
    }
    /// @notice Initialize the storage of L1MessageQueue.
    ///
    /// @dev The parameters `_messenger`, `_scrollChain` and `_enforcedTxGateway` are no longer used.
    ///
    /// @param _messenger The address of `L1ScrollMessenger` contract.
    /// @param _scrollChain The address of `ScrollChain` contract.
    /// @param _enforcedTxGateway The address of `EnforcedTxGateway` contract.
    /// @param _gasOracle The address of `GasOracle` contract.
    /// @param _maxGasLimit The maximum gas limit allowed in single transaction.
    function initialize(
        address _messenger,
        address _scrollChain,
        address _enforcedTxGateway,
        address _gasOracle,
        uint256 _maxGasLimit
    ) external initializer {
        OwnableUpgradeable.__Ownable_init();
        gasOracle = _gasOracle;
        maxGasLimit = _maxGasLimit;
        __messenger = _messenger;
        __scrollChain = _scrollChain;
        __enforcedTxGateway = _enforcedTxGateway;
    }
    /*************************
     * Public View Functions *
     *************************/
    /// @inheritdoc IL1MessageQueue
    function nextCrossDomainMessageIndex() external view returns (uint256) {
        return messageQueue.length;
    }
    /// @inheritdoc IL1MessageQueue
    function getCrossDomainMessage(uint256 _queueIndex) external view returns (bytes32) {
        return messageQueue[_queueIndex];
    }
    /// @inheritdoc IL1MessageQueue
    function estimateCrossDomainMessageFee(uint256 _gasLimit) external view virtual override returns (uint256) {
        address _oracle = gasOracle;
        if (_oracle == address(0)) return 0;
        return IL2GasPriceOracle(_oracle).estimateCrossDomainMessageFee(_gasLimit);
    }
    /// @inheritdoc IL1MessageQueue
    function calculateIntrinsicGasFee(bytes calldata _calldata) public view virtual override returns (uint256) {
        address _oracle = gasOracle;
        if (_oracle == address(0)) return 0;
        return IL2GasPriceOracle(_oracle).calculateIntrinsicGasFee(_calldata);
    }
    /// @inheritdoc IL1MessageQueue
    function computeTransactionHash(
        address _sender,
        uint256 _queueIndex,
        uint256 _value,
        address _target,
        uint256 _gasLimit,
        bytes calldata _data
    ) public pure override returns (bytes32) {
        // We use EIP-2718 to encode the L1 message, and the encoding of the message is
        //      `TransactionType || TransactionPayload`
        // where
        //  1. `TransactionType` is 0x7E
        //  2. `TransactionPayload` is `rlp([queueIndex, gasLimit, to, value, data, sender])`
        //
        // The spec of rlp: https://ethereum.org/en/developers/docs/data-structures-and-encoding/rlp/
        uint256 transactionType = 0x7E;
        bytes32 hash;
        assembly {
            function get_uint_bytes(v) -> len {
                if eq(v, 0) {
                    len := 1
                    leave
                }
                for {
                } gt(v, 0) {
                } {
                    len := add(len, 1)
                    v := shr(8, v)
                }
            }
            // This is used for both store uint and single byte.
            // Integer zero is special handled by geth to encode as `0x80`
            function store_uint_or_byte(_ptr, v, is_uint) -> ptr {
                ptr := _ptr
                switch lt(v, 128)
                case 1 {
                    switch and(iszero(v), is_uint)
                    case 1 {
                        // integer 0
                        mstore8(ptr, 0x80)
                    }
                    default {
                        // single byte in the [0x00, 0x7f]
                        mstore8(ptr, v)
                    }
                    ptr := add(ptr, 1)
                }
                default {
                    // 1-32 bytes long
                    let len := get_uint_bytes(v)
                    mstore8(ptr, add(len, 0x80))
                    ptr := add(ptr, 1)
                    mstore(ptr, shl(mul(8, sub(32, len)), v))
                    ptr := add(ptr, len)
                }
            }
            function store_address(_ptr, v) -> ptr {
                ptr := _ptr
                // 20 bytes long
                mstore8(ptr, 0x94) // 0x80 + 0x14
                ptr := add(ptr, 1)
                mstore(ptr, shl(96, v))
                ptr := add(ptr, 0x14)
            }
            // 1 byte for TransactionType
            // 4 byte for list payload length
            let start_ptr := add(mload(0x40), 5)
            let ptr := start_ptr
            ptr := store_uint_or_byte(ptr, _queueIndex, 1)
            ptr := store_uint_or_byte(ptr, _gasLimit, 1)
            ptr := store_address(ptr, _target)
            ptr := store_uint_or_byte(ptr, _value, 1)
            switch eq(_data.length, 1)
            case 1 {
                // single byte
                ptr := store_uint_or_byte(ptr, byte(0, calldataload(_data.offset)), 0)
            }
            default {
                switch lt(_data.length, 56)
                case 1 {
                    // a string is 0-55 bytes long
                    mstore8(ptr, add(0x80, _data.length))
                    ptr := add(ptr, 1)
                    calldatacopy(ptr, _data.offset, _data.length)
                    ptr := add(ptr, _data.length)
                }
                default {
                    // a string is more than 55 bytes long
                    let len_bytes := get_uint_bytes(_data.length)
                    mstore8(ptr, add(0xb7, len_bytes))
                    ptr := add(ptr, 1)
                    mstore(ptr, shl(mul(8, sub(32, len_bytes)), _data.length))
                    ptr := add(ptr, len_bytes)
                    calldatacopy(ptr, _data.offset, _data.length)
                    ptr := add(ptr, _data.length)
                }
            }
            ptr := store_address(ptr, _sender)
            let payload_len := sub(ptr, start_ptr)
            let value
            let value_bytes
            switch lt(payload_len, 56)
            case 1 {
                // the total payload of a list is 0-55 bytes long
                value := add(0xc0, payload_len)
                value_bytes := 1
            }
            default {
                // If the total payload of a list is more than 55 bytes long
                let len_bytes := get_uint_bytes(payload_len)
                value_bytes := add(len_bytes, 1)
                value := add(0xf7, len_bytes)
                value := shl(mul(len_bytes, 8), value)
                value := or(value, payload_len)
            }
            value := or(value, shl(mul(8, value_bytes), transactionType))
            value_bytes := add(value_bytes, 1)
            let value_bits := mul(8, value_bytes)
            value := or(shl(sub(256, value_bits), value), shr(value_bits, mload(start_ptr)))
            start_ptr := sub(start_ptr, value_bytes)
            mstore(start_ptr, value)
            hash := keccak256(start_ptr, sub(ptr, start_ptr))
        }
        return hash;
    }
    /// @inheritdoc IL1MessageQueue
    function isMessageSkipped(uint256 _queueIndex) external view returns (bool) {
        if (_queueIndex >= pendingQueueIndex) return false;
        return _isMessageSkipped(_queueIndex);
    }
    /// @inheritdoc IL1MessageQueue
    function isMessageDropped(uint256 _queueIndex) external view returns (bool) {
        // it should be a skipped message first.
        return _isMessageSkipped(_queueIndex) && droppedMessageBitmap.get(_queueIndex);
    }
    /*****************************
     * Public Mutating Functions *
     *****************************/
    /// @inheritdoc IL1MessageQueue
    function appendCrossDomainMessage(
        address _target,
        uint256 _gasLimit,
        bytes calldata _data
    ) external override onlyMessenger {
        // validate gas limit
        _validateGasLimit(_gasLimit, _data);
        // do address alias to avoid replay attack in L2.
        address _sender = AddressAliasHelper.applyL1ToL2Alias(_msgSender());
        _queueTransaction(_sender, _target, 0, _gasLimit, _data);
    }
    /// @inheritdoc IL1MessageQueue
    function appendEnforcedTransaction(
        address _sender,
        address _target,
        uint256 _value,
        uint256 _gasLimit,
        bytes calldata _data
    ) external override {
        require(_msgSender() == enforcedTxGateway, "Only callable by the EnforcedTxGateway");
        // We will check it in EnforcedTxGateway, just in case.
        require(_sender.code.length == 0, "only EOA");
        // validate gas limit
        _validateGasLimit(_gasLimit, _data);
        _queueTransaction(_sender, _target, _value, _gasLimit, _data);
    }
    /// @inheritdoc IL1MessageQueue
    function popCrossDomainMessage(
        uint256 _startIndex,
        uint256 _count,
        uint256 _skippedBitmap
    ) external {
        require(_msgSender() == scrollChain, "Only callable by the ScrollChain");
        require(_count <= 256, "pop too many messages");
        require(pendingQueueIndex == _startIndex, "start index mismatch");
        unchecked {
            // clear extra bits in `_skippedBitmap`, and if _count = 256, it's designed to overflow.
            uint256 mask = (1 << _count) - 1;
            _skippedBitmap &= mask;
            uint256 bucket = _startIndex >> 8;
            uint256 offset = _startIndex & 0xff;
            skippedMessageBitmap[bucket] |= _skippedBitmap << offset;
            if (offset + _count > 256) {
                skippedMessageBitmap[bucket + 1] = _skippedBitmap >> (256 - offset);
            }
            pendingQueueIndex = _startIndex + _count;
        }
        emit DequeueTransaction(_startIndex, _count, _skippedBitmap);
    }
    /// @inheritdoc IL1MessageQueue
    function dropCrossDomainMessage(uint256 _index) external onlyMessenger {
        require(_index < pendingQueueIndex, "cannot drop pending message");
        require(_isMessageSkipped(_index), "drop non-skipped message");
        require(!droppedMessageBitmap.get(_index), "message already dropped");
        droppedMessageBitmap.set(_index);
        emit DropTransaction(_index);
    }
    /************************
     * Restricted Functions *
     ************************/
    /// @notice Update the address of gas oracle.
    /// @dev This function can only called by contract owner.
    /// @param _newGasOracle The address to update.
    function updateGasOracle(address _newGasOracle) external onlyOwner {
        address _oldGasOracle = gasOracle;
        gasOracle = _newGasOracle;
        emit UpdateGasOracle(_oldGasOracle, _newGasOracle);
    }
    /// @notice Update the max gas limit.
    /// @dev This function can only called by contract owner.
    /// @param _newMaxGasLimit The new max gas limit.
    function updateMaxGasLimit(uint256 _newMaxGasLimit) external onlyOwner {
        uint256 _oldMaxGasLimit = maxGasLimit;
        maxGasLimit = _newMaxGasLimit;
        emit UpdateMaxGasLimit(_oldMaxGasLimit, _newMaxGasLimit);
    }
    /**********************
     * Internal Functions *
     **********************/
    /// @dev Internal function to queue a L1 transaction.
    /// @param _sender The address of sender who will initiate this transaction in L2.
    /// @param _target The address of target contract to call in L2.
    /// @param _value The value passed
    /// @param _gasLimit The maximum gas should be used for this transaction in L2.
    /// @param _data The calldata passed to target contract.
    function _queueTransaction(
        address _sender,
        address _target,
        uint256 _value,
        uint256 _gasLimit,
        bytes calldata _data
    ) internal {
        // compute transaction hash
        uint256 _queueIndex = messageQueue.length;
        bytes32 _hash = computeTransactionHash(_sender, _queueIndex, _value, _target, _gasLimit, _data);
        messageQueue.push(_hash);
        // emit event
        emit QueueTransaction(_sender, _target, _value, uint64(_queueIndex), _gasLimit, _data);
    }
    function _validateGasLimit(uint256 _gasLimit, bytes calldata _calldata) internal view {
        require(_gasLimit <= maxGasLimit, "Gas limit must not exceed maxGasLimit");
        // check if the gas limit is above intrinsic gas
        uint256 intrinsicGas = calculateIntrinsicGasFee(_calldata);
        require(_gasLimit >= intrinsicGas, "Insufficient gas limit, must be above intrinsic gas");
    }
    /// @dev Returns whether the bit at `index` is set.
    function _isMessageSkipped(uint256 index) internal view returns (bool) {
        uint256 bucket = index >> 8;
        uint256 mask = 1 << (index & 0xff);
        return skippedMessageBitmap[bucket] & mask != 0;
    }
}
// SPDX-License-Identifier: MIT
pragma solidity =0.8.16;
import {IWhitelist} from "../../libraries/common/IWhitelist.sol";
import {IL1MessageQueue} from "./IL1MessageQueue.sol";
import {IL1MessageQueueWithGasPriceOracle} from "./IL1MessageQueueWithGasPriceOracle.sol";
import {IL2GasPriceOracle} from "./IL2GasPriceOracle.sol";
import {L1MessageQueue} from "./L1MessageQueue.sol";
contract L1MessageQueueWithGasPriceOracle is L1MessageQueue, IL1MessageQueueWithGasPriceOracle {
    /*************
     * Constants *
     *************/
    /// @notice The intrinsic gas for transaction.
    uint256 private constant INTRINSIC_GAS_TX = 21000;
    /// @notice The appropriate intrinsic gas for each byte.
    uint256 private constant APPROPRIATE_INTRINSIC_GAS_PER_BYTE = 16;
    /*************
     * Variables *
     *************/
    /// @inheritdoc IL1MessageQueueWithGasPriceOracle
    uint256 public override l2BaseFee;
    /// @inheritdoc IL1MessageQueueWithGasPriceOracle
    address public override whitelistChecker;
    /***************
     * Constructor *
     ***************/
    /// @notice Constructor for `L1MessageQueueWithGasPriceOracle` implementation contract.
    ///
    /// @param _messenger The address of `L1ScrollMessenger` contract.
    /// @param _scrollChain The address of `ScrollChain` contract.
    /// @param _enforcedTxGateway The address of `EnforcedTxGateway` contract.
    constructor(
        address _messenger,
        address _scrollChain,
        address _enforcedTxGateway
    ) L1MessageQueue(_messenger, _scrollChain, _enforcedTxGateway) {}
    /// @notice Initialize the storage of L1MessageQueueWithGasPriceOracle.
    function initializeV2() external reinitializer(2) {
        l2BaseFee = IL2GasPriceOracle(gasOracle).l2BaseFee();
        whitelistChecker = IL2GasPriceOracle(gasOracle).whitelist();
    }
    /*************************
     * Public View Functions *
     *************************/
    /// @inheritdoc IL1MessageQueue
    function estimateCrossDomainMessageFee(uint256 _gasLimit)
        external
        view
        override(IL1MessageQueue, L1MessageQueue)
        returns (uint256)
    {
        return _gasLimit * l2BaseFee;
    }
    /// @inheritdoc IL1MessageQueue
    function calculateIntrinsicGasFee(bytes calldata _calldata)
        public
        pure
        override(IL1MessageQueue, L1MessageQueue)
        returns (uint256)
    {
        // no way this can overflow `uint256`
        unchecked {
            return INTRINSIC_GAS_TX + _calldata.length * APPROPRIATE_INTRINSIC_GAS_PER_BYTE;
        }
    }
    /*****************************
     * Public Mutating Functions *
     *****************************/
    /// @notice Allows whitelistCheckered caller to modify the l2 base fee.
    /// @param _newL2BaseFee The new l2 base fee.
    function setL2BaseFee(uint256 _newL2BaseFee) external {
        if (!IWhitelist(whitelistChecker).isSenderAllowed(_msgSender())) {
            revert ErrorNotWhitelistedSender();
        }
        uint256 _oldL2BaseFee = l2BaseFee;
        l2BaseFee = _newL2BaseFee;
        emit UpdateL2BaseFee(_oldL2BaseFee, _newL2BaseFee);
    }
    /************************
     * Restricted Functions *
     ************************/
    /// @notice Update whitelist checker contract.
    /// @dev This function can only called by contract owner.
    /// @param _newWhitelistChecker The address of new whitelist checker contract.
    function updateWhitelistChecker(address _newWhitelistChecker) external onlyOwner {
        address _oldWhitelistChecker = whitelistChecker;
        whitelistChecker = _newWhitelistChecker;
        emit UpdateWhitelistChecker(_oldWhitelistChecker, _newWhitelistChecker);
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
library AddressAliasHelper {
    /// @dev The offset added to the address in L1.
    uint160 internal constant OFFSET = uint160(0x1111000000000000000000000000000000001111);
    /// @notice Utility function that converts the address in the L1 that submitted a tx to
    /// the inbox to the msg.sender viewed in the L2
    /// @param l1Address the address in the L1 that triggered the tx to L2
    /// @return l2Address L2 address as viewed in msg.sender
    function applyL1ToL2Alias(address l1Address) internal pure returns (address l2Address) {
        unchecked {
            l2Address = address(uint160(l1Address) + OFFSET);
        }
    }
    /// @notice Utility function that converts the msg.sender viewed in the L2 to the
    /// address in the L1 that submitted a tx to the inbox
    /// @param l2Address L2 address as viewed in msg.sender
    /// @return l1Address the address in the L1 that triggered the tx to L2
    function undoL1ToL2Alias(address l2Address) internal pure returns (address l1Address) {
        unchecked {
            l1Address = address(uint160(l2Address) - OFFSET);
        }
    }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.16;
interface IWhitelist {
    /// @notice Check whether the sender is allowed to do something.
    /// @param _sender The address of sender.
    function isSenderAllowed(address _sender) external view returns (bool);
}

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
import "./base/ModuleManager.sol";
import "./base/OwnerManager.sol";
import "./base/FallbackManager.sol";
import "./base/GuardManager.sol";
import "./common/EtherPaymentFallback.sol";
import "./common/Singleton.sol";
import "./common/SignatureDecoder.sol";
import "./common/SecuredTokenTransfer.sol";
import "./common/StorageAccessible.sol";
import "./interfaces/ISignatureValidator.sol";
import "./external/GnosisSafeMath.sol";
/// @title Gnosis Safe - A multisignature wallet with support for confirmations using signed messages based on ERC191.
/// @author Stefan George - <[email protected]>
/// @author Richard Meissner - <[email protected]>
contract GnosisSafe is
    EtherPaymentFallback,
    Singleton,
    ModuleManager,
    OwnerManager,
    SignatureDecoder,
    SecuredTokenTransfer,
    ISignatureValidatorConstants,
    FallbackManager,
    StorageAccessible,
    GuardManager
{
    using GnosisSafeMath for uint256;
    string public constant VERSION = "1.3.0";
    // keccak256(
    //     "EIP712Domain(uint256 chainId,address verifyingContract)"
    // );
    bytes32 private constant DOMAIN_SEPARATOR_TYPEHASH = 0x47e79534a245952e8b16893a336b85a3d9ea9fa8c573f3d803afb92a79469218;
    // keccak256(
    //     "SafeTx(address to,uint256 value,bytes data,uint8 operation,uint256 safeTxGas,uint256 baseGas,uint256 gasPrice,address gasToken,address refundReceiver,uint256 nonce)"
    // );
    bytes32 private constant SAFE_TX_TYPEHASH = 0xbb8310d486368db6bd6f849402fdd73ad53d316b5a4b2644ad6efe0f941286d8;
    event SafeSetup(address indexed initiator, address[] owners, uint256 threshold, address initializer, address fallbackHandler);
    event ApproveHash(bytes32 indexed approvedHash, address indexed owner);
    event SignMsg(bytes32 indexed msgHash);
    event ExecutionFailure(bytes32 txHash, uint256 payment);
    event ExecutionSuccess(bytes32 txHash, uint256 payment);
    uint256 public nonce;
    bytes32 private _deprecatedDomainSeparator;
    // Mapping to keep track of all message hashes that have been approve by ALL REQUIRED owners
    mapping(bytes32 => uint256) public signedMessages;
    // Mapping to keep track of all hashes (message or transaction) that have been approve by ANY owners
    mapping(address => mapping(bytes32 => uint256)) public approvedHashes;
    // This constructor ensures that this contract can only be used as a master copy for Proxy contracts
    constructor() {
        // By setting the threshold it is not possible to call setup anymore,
        // so we create a Safe with 0 owners and threshold 1.
        // This is an unusable Safe, perfect for the singleton
        threshold = 1;
    }
    /// @dev Setup function sets initial storage of contract.
    /// @param _owners List of Safe owners.
    /// @param _threshold Number of required confirmations for a Safe transaction.
    /// @param to Contract address for optional delegate call.
    /// @param data Data payload for optional delegate call.
    /// @param fallbackHandler Handler for fallback calls to this contract
    /// @param paymentToken Token that should be used for the payment (0 is ETH)
    /// @param payment Value that should be paid
    /// @param paymentReceiver Adddress that should receive the payment (or 0 if tx.origin)
    function setup(
        address[] calldata _owners,
        uint256 _threshold,
        address to,
        bytes calldata data,
        address fallbackHandler,
        address paymentToken,
        uint256 payment,
        address payable paymentReceiver
    ) external {
        // setupOwners checks if the Threshold is already set, therefore preventing that this method is called twice
        setupOwners(_owners, _threshold);
        if (fallbackHandler != address(0)) internalSetFallbackHandler(fallbackHandler);
        // As setupOwners can only be called if the contract has not been initialized we don't need a check for setupModules
        setupModules(to, data);
        if (payment > 0) {
            // To avoid running into issues with EIP-170 we reuse the handlePayment function (to avoid adjusting code of that has been verified we do not adjust the method itself)
            // baseGas = 0, gasPrice = 1 and gas = payment => amount = (payment + 0) * 1 = payment
            handlePayment(payment, 0, 1, paymentToken, paymentReceiver);
        }
        emit SafeSetup(msg.sender, _owners, _threshold, to, fallbackHandler);
    }
    /// @dev Allows to execute a Safe transaction confirmed by required number of owners and then pays the account that submitted the transaction.
    ///      Note: The fees are always transferred, even if the user transaction fails.
    /// @param to Destination address of Safe transaction.
    /// @param value Ether value of Safe transaction.
    /// @param data Data payload of Safe transaction.
    /// @param operation Operation type of Safe transaction.
    /// @param safeTxGas Gas that should be used for the Safe transaction.
    /// @param baseGas Gas costs that are independent of the transaction execution(e.g. base transaction fee, signature check, payment of the refund)
    /// @param gasPrice Gas price that should be used for the payment calculation.
    /// @param gasToken Token address (or 0 if ETH) that is used for the payment.
    /// @param refundReceiver Address of receiver of gas payment (or 0 if tx.origin).
    /// @param signatures Packed signature data ({bytes32 r}{bytes32 s}{uint8 v})
    function execTransaction(
        address to,
        uint256 value,
        bytes calldata data,
        Enum.Operation operation,
        uint256 safeTxGas,
        uint256 baseGas,
        uint256 gasPrice,
        address gasToken,
        address payable refundReceiver,
        bytes memory signatures
    ) public payable virtual returns (bool success) {
        bytes32 txHash;
        // Use scope here to limit variable lifetime and prevent `stack too deep` errors
        {
            bytes memory txHashData =
                encodeTransactionData(
                    // Transaction info
                    to,
                    value,
                    data,
                    operation,
                    safeTxGas,
                    // Payment info
                    baseGas,
                    gasPrice,
                    gasToken,
                    refundReceiver,
                    // Signature info
                    nonce
                );
            // Increase nonce and execute transaction.
            nonce++;
            txHash = keccak256(txHashData);
            checkSignatures(txHash, txHashData, signatures);
        }
        address guard = getGuard();
        {
            if (guard != address(0)) {
                Guard(guard).checkTransaction(
                    // Transaction info
                    to,
                    value,
                    data,
                    operation,
                    safeTxGas,
                    // Payment info
                    baseGas,
                    gasPrice,
                    gasToken,
                    refundReceiver,
                    // Signature info
                    signatures,
                    msg.sender
                );
            }
        }
        // We require some gas to emit the events (at least 2500) after the execution and some to perform code until the execution (500)
        // We also include the 1/64 in the check that is not send along with a call to counteract potential shortings because of EIP-150
        require(gasleft() >= ((safeTxGas * 64) / 63).max(safeTxGas + 2500) + 500, "GS010");
        // Use scope here to limit variable lifetime and prevent `stack too deep` errors
        {
            uint256 gasUsed = gasleft();
            // If the gasPrice is 0 we assume that nearly all available gas can be used (it is always more than safeTxGas)
            // We only substract 2500 (compared to the 3000 before) to ensure that the amount passed is still higher than safeTxGas
            success = execute(to, value, data, operation, gasPrice == 0 ? (gasleft() - 2500) : safeTxGas);
            gasUsed = gasUsed.sub(gasleft());
            // If no safeTxGas and no gasPrice was set (e.g. both are 0), then the internal tx is required to be successful
            // This makes it possible to use `estimateGas` without issues, as it searches for the minimum gas where the tx doesn't revert
            require(success || safeTxGas != 0 || gasPrice != 0, "GS013");
            // We transfer the calculated tx costs to the tx.origin to avoid sending it to intermediate contracts that have made calls
            uint256 payment = 0;
            if (gasPrice > 0) {
                payment = handlePayment(gasUsed, baseGas, gasPrice, gasToken, refundReceiver);
            }
            if (success) emit ExecutionSuccess(txHash, payment);
            else emit ExecutionFailure(txHash, payment);
        }
        {
            if (guard != address(0)) {
                Guard(guard).checkAfterExecution(txHash, success);
            }
        }
    }
    function handlePayment(
        uint256 gasUsed,
        uint256 baseGas,
        uint256 gasPrice,
        address gasToken,
        address payable refundReceiver
    ) private returns (uint256 payment) {
        // solhint-disable-next-line avoid-tx-origin
        address payable receiver = refundReceiver == address(0) ? payable(tx.origin) : refundReceiver;
        if (gasToken == address(0)) {
            // For ETH we will only adjust the gas price to not be higher than the actual used gas price
            payment = gasUsed.add(baseGas).mul(gasPrice < tx.gasprice ? gasPrice : tx.gasprice);
            require(receiver.send(payment), "GS011");
        } else {
            payment = gasUsed.add(baseGas).mul(gasPrice);
            require(transferToken(gasToken, receiver, payment), "GS012");
        }
    }
    /**
     * @dev Checks whether the signature provided is valid for the provided data, hash. Will revert otherwise.
     * @param dataHash Hash of the data (could be either a message hash or transaction hash)
     * @param data That should be signed (this is passed to an external validator contract)
     * @param signatures Signature data that should be verified. Can be ECDSA signature, contract signature (EIP-1271) or approved hash.
     */
    function checkSignatures(
        bytes32 dataHash,
        bytes memory data,
        bytes memory signatures
    ) public view {
        // Load threshold to avoid multiple storage loads
        uint256 _threshold = threshold;
        // Check that a threshold is set
        require(_threshold > 0, "GS001");
        checkNSignatures(dataHash, data, signatures, _threshold);
    }
    /**
     * @dev Checks whether the signature provided is valid for the provided data, hash. Will revert otherwise.
     * @param dataHash Hash of the data (could be either a message hash or transaction hash)
     * @param data That should be signed (this is passed to an external validator contract)
     * @param signatures Signature data that should be verified. Can be ECDSA signature, contract signature (EIP-1271) or approved hash.
     * @param requiredSignatures Amount of required valid signatures.
     */
    function checkNSignatures(
        bytes32 dataHash,
        bytes memory data,
        bytes memory signatures,
        uint256 requiredSignatures
    ) public view {
        // Check that the provided signature data is not too short
        require(signatures.length >= requiredSignatures.mul(65), "GS020");
        // There cannot be an owner with address 0.
        address lastOwner = address(0);
        address currentOwner;
        uint8 v;
        bytes32 r;
        bytes32 s;
        uint256 i;
        for (i = 0; i < requiredSignatures; i++) {
            (v, r, s) = signatureSplit(signatures, i);
            if (v == 0) {
                // If v is 0 then it is a contract signature
                // When handling contract signatures the address of the contract is encoded into r
                currentOwner = address(uint160(uint256(r)));
                // Check that signature data pointer (s) is not pointing inside the static part of the signatures bytes
                // This check is not completely accurate, since it is possible that more signatures than the threshold are send.
                // Here we only check that the pointer is not pointing inside the part that is being processed
                require(uint256(s) >= requiredSignatures.mul(65), "GS021");
                // Check that signature data pointer (s) is in bounds (points to the length of data -> 32 bytes)
                require(uint256(s).add(32) <= signatures.length, "GS022");
                // Check if the contract signature is in bounds: start of data is s + 32 and end is start + signature length
                uint256 contractSignatureLen;
                // solhint-disable-next-line no-inline-assembly
                assembly {
                    contractSignatureLen := mload(add(add(signatures, s), 0x20))
                }
                require(uint256(s).add(32).add(contractSignatureLen) <= signatures.length, "GS023");
                // Check signature
                bytes memory contractSignature;
                // solhint-disable-next-line no-inline-assembly
                assembly {
                    // The signature data for contract signatures is appended to the concatenated signatures and the offset is stored in s
                    contractSignature := add(add(signatures, s), 0x20)
                }
                require(ISignatureValidator(currentOwner).isValidSignature(data, contractSignature) == EIP1271_MAGIC_VALUE, "GS024");
            } else if (v == 1) {
                // If v is 1 then it is an approved hash
                // When handling approved hashes the address of the approver is encoded into r
                currentOwner = address(uint160(uint256(r)));
                // Hashes are automatically approved by the sender of the message or when they have been pre-approved via a separate transaction
                require(msg.sender == currentOwner || approvedHashes[currentOwner][dataHash] != 0, "GS025");
            } else if (v > 30) {
                // If v > 30 then default va (27,28) has been adjusted for eth_sign flow
                // To support eth_sign and similar we adjust v and hash the messageHash with the Ethereum message prefix before applying ecrecover
                currentOwner = ecrecover(keccak256(abi.encodePacked("\\x19Ethereum Signed Message:\
32", dataHash)), v - 4, r, s);
            } else {
                // Default is the ecrecover flow with the provided data hash
                // Use ecrecover with the messageHash for EOA signatures
                currentOwner = ecrecover(dataHash, v, r, s);
            }
            require(currentOwner > lastOwner && owners[currentOwner] != address(0) && currentOwner != SENTINEL_OWNERS, "GS026");
            lastOwner = currentOwner;
        }
    }
    /// @dev Allows to estimate a Safe transaction.
    ///      This method is only meant for estimation purpose, therefore the call will always revert and encode the result in the revert data.
    ///      Since the `estimateGas` function includes refunds, call this method to get an estimated of the costs that are deducted from the safe with `execTransaction`
    /// @param to Destination address of Safe transaction.
    /// @param value Ether value of Safe transaction.
    /// @param data Data payload of Safe transaction.
    /// @param operation Operation type of Safe transaction.
    /// @return Estimate without refunds and overhead fees (base transaction and payload data gas costs).
    /// @notice Deprecated in favor of common/StorageAccessible.sol and will be removed in next version.
    function requiredTxGas(
        address to,
        uint256 value,
        bytes calldata data,
        Enum.Operation operation
    ) external returns (uint256) {
        uint256 startGas = gasleft();
        // We don't provide an error message here, as we use it to return the estimate
        require(execute(to, value, data, operation, gasleft()));
        uint256 requiredGas = startGas - gasleft();
        // Convert response to string and return via error message
        revert(string(abi.encodePacked(requiredGas)));
    }
    /**
     * @dev Marks a hash as approved. This can be used to validate a hash that is used by a signature.
     * @param hashToApprove The hash that should be marked as approved for signatures that are verified by this contract.
     */
    function approveHash(bytes32 hashToApprove) external {
        require(owners[msg.sender] != address(0), "GS030");
        approvedHashes[msg.sender][hashToApprove] = 1;
        emit ApproveHash(hashToApprove, msg.sender);
    }
    /// @dev Returns the chain id used by this contract.
    function getChainId() public view returns (uint256) {
        uint256 id;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            id := chainid()
        }
        return id;
    }
    function domainSeparator() public view returns (bytes32) {
        return keccak256(abi.encode(DOMAIN_SEPARATOR_TYPEHASH, getChainId(), this));
    }
    /// @dev Returns the bytes that are hashed to be signed by owners.
    /// @param to Destination address.
    /// @param value Ether value.
    /// @param data Data payload.
    /// @param operation Operation type.
    /// @param safeTxGas Gas that should be used for the safe transaction.
    /// @param baseGas Gas costs for that are independent of the transaction execution(e.g. base transaction fee, signature check, payment of the refund)
    /// @param gasPrice Maximum gas price that should be used for this transaction.
    /// @param gasToken Token address (or 0 if ETH) that is used for the payment.
    /// @param refundReceiver Address of receiver of gas payment (or 0 if tx.origin).
    /// @param _nonce Transaction nonce.
    /// @return Transaction hash bytes.
    function encodeTransactionData(
        address to,
        uint256 value,
        bytes calldata data,
        Enum.Operation operation,
        uint256 safeTxGas,
        uint256 baseGas,
        uint256 gasPrice,
        address gasToken,
        address refundReceiver,
        uint256 _nonce
    ) public view returns (bytes memory) {
        bytes32 safeTxHash =
            keccak256(
                abi.encode(
                    SAFE_TX_TYPEHASH,
                    to,
                    value,
                    keccak256(data),
                    operation,
                    safeTxGas,
                    baseGas,
                    gasPrice,
                    gasToken,
                    refundReceiver,
                    _nonce
                )
            );
        return abi.encodePacked(bytes1(0x19), bytes1(0x01), domainSeparator(), safeTxHash);
    }
    /// @dev Returns hash to be signed by owners.
    /// @param to Destination address.
    /// @param value Ether value.
    /// @param data Data payload.
    /// @param operation Operation type.
    /// @param safeTxGas Fas that should be used for the safe transaction.
    /// @param baseGas Gas costs for data used to trigger the safe transaction.
    /// @param gasPrice Maximum gas price that should be used for this transaction.
    /// @param gasToken Token address (or 0 if ETH) that is used for the payment.
    /// @param refundReceiver Address of receiver of gas payment (or 0 if tx.origin).
    /// @param _nonce Transaction nonce.
    /// @return Transaction hash.
    function getTransactionHash(
        address to,
        uint256 value,
        bytes calldata data,
        Enum.Operation operation,
        uint256 safeTxGas,
        uint256 baseGas,
        uint256 gasPrice,
        address gasToken,
        address refundReceiver,
        uint256 _nonce
    ) public view returns (bytes32) {
        return keccak256(encodeTransactionData(to, value, data, operation, safeTxGas, baseGas, gasPrice, gasToken, refundReceiver, _nonce));
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
import "../common/Enum.sol";
/// @title Executor - A contract that can execute transactions
/// @author Richard Meissner - <[email protected]>
contract Executor {
    function execute(
        address to,
        uint256 value,
        bytes memory data,
        Enum.Operation operation,
        uint256 txGas
    ) internal returns (bool success) {
        if (operation == Enum.Operation.DelegateCall) {
            // solhint-disable-next-line no-inline-assembly
            assembly {
                success := delegatecall(txGas, to, add(data, 0x20), mload(data), 0, 0)
            }
        } else {
            // solhint-disable-next-line no-inline-assembly
            assembly {
                success := call(txGas, to, value, add(data, 0x20), mload(data), 0, 0)
            }
        }
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
import "../common/SelfAuthorized.sol";
/// @title Fallback Manager - A contract that manages fallback calls made to this contract
/// @author Richard Meissner - <[email protected]>
contract FallbackManager is SelfAuthorized {
    event ChangedFallbackHandler(address handler);
    // keccak256("fallback_manager.handler.address")
    bytes32 internal constant FALLBACK_HANDLER_STORAGE_SLOT = 0x6c9a6c4a39284e37ed1cf53d337577d14212a4870fb976a4366c693b939918d5;
    function internalSetFallbackHandler(address handler) internal {
        bytes32 slot = FALLBACK_HANDLER_STORAGE_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, handler)
        }
    }
    /// @dev Allows to add a contract to handle fallback calls.
    ///      Only fallback calls without value and with data will be forwarded.
    ///      This can only be done via a Safe transaction.
    /// @param handler contract to handle fallbacks calls.
    function setFallbackHandler(address handler) public authorized {
        internalSetFallbackHandler(handler);
        emit ChangedFallbackHandler(handler);
    }
    // solhint-disable-next-line payable-fallback,no-complex-fallback
    fallback() external {
        bytes32 slot = FALLBACK_HANDLER_STORAGE_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let handler := sload(slot)
            if iszero(handler) {
                return(0, 0)
            }
            calldatacopy(0, 0, calldatasize())
            // The msg.sender address is shifted to the left by 12 bytes to remove the padding
            // Then the address without padding is stored right after the calldata
            mstore(calldatasize(), shl(96, caller()))
            // Add 20 bytes for the address appended add the end
            let success := call(gas(), handler, 0, 0, add(calldatasize(), 20), 0, 0)
            returndatacopy(0, 0, returndatasize())
            if iszero(success) {
                revert(0, returndatasize())
            }
            return(0, returndatasize())
        }
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
import "../common/Enum.sol";
import "../common/SelfAuthorized.sol";
interface Guard {
    function checkTransaction(
        address to,
        uint256 value,
        bytes memory data,
        Enum.Operation operation,
        uint256 safeTxGas,
        uint256 baseGas,
        uint256 gasPrice,
        address gasToken,
        address payable refundReceiver,
        bytes memory signatures,
        address msgSender
    ) external;
    function checkAfterExecution(bytes32 txHash, bool success) external;
}
/// @title Fallback Manager - A contract that manages fallback calls made to this contract
/// @author Richard Meissner - <[email protected]>
contract GuardManager is SelfAuthorized {
    event ChangedGuard(address guard);
    // keccak256("guard_manager.guard.address")
    bytes32 internal constant GUARD_STORAGE_SLOT = 0x4a204f620c8c5ccdca3fd54d003badd85ba500436a431f0cbda4f558c93c34c8;
    /// @dev Set a guard that checks transactions before execution
    /// @param guard The address of the guard to be used or the 0 address to disable the guard
    function setGuard(address guard) external authorized {
        bytes32 slot = GUARD_STORAGE_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            sstore(slot, guard)
        }
        emit ChangedGuard(guard);
    }
    function getGuard() internal view returns (address guard) {
        bytes32 slot = GUARD_STORAGE_SLOT;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            guard := sload(slot)
        }
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
import "../common/Enum.sol";
import "../common/SelfAuthorized.sol";
import "./Executor.sol";
/// @title Module Manager - A contract that manages modules that can execute transactions via this contract
/// @author Stefan George - <[email protected]>
/// @author Richard Meissner - <[email protected]>
contract ModuleManager is SelfAuthorized, Executor {
    event EnabledModule(address module);
    event DisabledModule(address module);
    event ExecutionFromModuleSuccess(address indexed module);
    event ExecutionFromModuleFailure(address indexed module);
    address internal constant SENTINEL_MODULES = address(0x1);
    mapping(address => address) internal modules;
    function setupModules(address to, bytes memory data) internal {
        require(modules[SENTINEL_MODULES] == address(0), "GS100");
        modules[SENTINEL_MODULES] = SENTINEL_MODULES;
        if (to != address(0))
            // Setup has to complete successfully or transaction fails.
            require(execute(to, 0, data, Enum.Operation.DelegateCall, gasleft()), "GS000");
    }
    /// @dev Allows to add a module to the whitelist.
    ///      This can only be done via a Safe transaction.
    /// @notice Enables the module `module` for the Safe.
    /// @param module Module to be whitelisted.
    function enableModule(address module) public authorized {
        // Module address cannot be null or sentinel.
        require(module != address(0) && module != SENTINEL_MODULES, "GS101");
        // Module cannot be added twice.
        require(modules[module] == address(0), "GS102");
        modules[module] = modules[SENTINEL_MODULES];
        modules[SENTINEL_MODULES] = module;
        emit EnabledModule(module);
    }
    /// @dev Allows to remove a module from the whitelist.
    ///      This can only be done via a Safe transaction.
    /// @notice Disables the module `module` for the Safe.
    /// @param prevModule Module that pointed to the module to be removed in the linked list
    /// @param module Module to be removed.
    function disableModule(address prevModule, address module) public authorized {
        // Validate module address and check that it corresponds to module index.
        require(module != address(0) && module != SENTINEL_MODULES, "GS101");
        require(modules[prevModule] == module, "GS103");
        modules[prevModule] = modules[module];
        modules[module] = address(0);
        emit DisabledModule(module);
    }
    /// @dev Allows a Module to execute a Safe transaction without any further confirmations.
    /// @param to Destination address of module transaction.
    /// @param value Ether value of module transaction.
    /// @param data Data payload of module transaction.
    /// @param operation Operation type of module transaction.
    function execTransactionFromModule(
        address to,
        uint256 value,
        bytes memory data,
        Enum.Operation operation
    ) public virtual returns (bool success) {
        // Only whitelisted modules are allowed.
        require(msg.sender != SENTINEL_MODULES && modules[msg.sender] != address(0), "GS104");
        // Execute transaction without further confirmations.
        success = execute(to, value, data, operation, gasleft());
        if (success) emit ExecutionFromModuleSuccess(msg.sender);
        else emit ExecutionFromModuleFailure(msg.sender);
    }
    /// @dev Allows a Module to execute a Safe transaction without any further confirmations and return data
    /// @param to Destination address of module transaction.
    /// @param value Ether value of module transaction.
    /// @param data Data payload of module transaction.
    /// @param operation Operation type of module transaction.
    function execTransactionFromModuleReturnData(
        address to,
        uint256 value,
        bytes memory data,
        Enum.Operation operation
    ) public returns (bool success, bytes memory returnData) {
        success = execTransactionFromModule(to, value, data, operation);
        // solhint-disable-next-line no-inline-assembly
        assembly {
            // Load free memory location
            let ptr := mload(0x40)
            // We allocate memory for the return data by setting the free memory location to
            // current free memory location + data size + 32 bytes for data size value
            mstore(0x40, add(ptr, add(returndatasize(), 0x20)))
            // Store the size
            mstore(ptr, returndatasize())
            // Store the data
            returndatacopy(add(ptr, 0x20), 0, returndatasize())
            // Point the return data to the correct memory location
            returnData := ptr
        }
    }
    /// @dev Returns if an module is enabled
    /// @return True if the module is enabled
    function isModuleEnabled(address module) public view returns (bool) {
        return SENTINEL_MODULES != module && modules[module] != address(0);
    }
    /// @dev Returns array of modules.
    /// @param start Start of the page.
    /// @param pageSize Maximum number of modules that should be returned.
    /// @return array Array of modules.
    /// @return next Start of the next page.
    function getModulesPaginated(address start, uint256 pageSize) external view returns (address[] memory array, address next) {
        // Init array with max page size
        array = new address[](pageSize);
        // Populate return array
        uint256 moduleCount = 0;
        address currentModule = modules[start];
        while (currentModule != address(0x0) && currentModule != SENTINEL_MODULES && moduleCount < pageSize) {
            array[moduleCount] = currentModule;
            currentModule = modules[currentModule];
            moduleCount++;
        }
        next = currentModule;
        // Set correct size of returned array
        // solhint-disable-next-line no-inline-assembly
        assembly {
            mstore(array, moduleCount)
        }
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
import "../common/SelfAuthorized.sol";
/// @title OwnerManager - Manages a set of owners and a threshold to perform actions.
/// @author Stefan George - <[email protected]>
/// @author Richard Meissner - <[email protected]>
contract OwnerManager is SelfAuthorized {
    event AddedOwner(address owner);
    event RemovedOwner(address owner);
    event ChangedThreshold(uint256 threshold);
    address internal constant SENTINEL_OWNERS = address(0x1);
    mapping(address => address) internal owners;
    uint256 internal ownerCount;
    uint256 internal threshold;
    /// @dev Setup function sets initial storage of contract.
    /// @param _owners List of Safe owners.
    /// @param _threshold Number of required confirmations for a Safe transaction.
    function setupOwners(address[] memory _owners, uint256 _threshold) internal {
        // Threshold can only be 0 at initialization.
        // Check ensures that setup function can only be called once.
        require(threshold == 0, "GS200");
        // Validate that threshold is smaller than number of added owners.
        require(_threshold <= _owners.length, "GS201");
        // There has to be at least one Safe owner.
        require(_threshold >= 1, "GS202");
        // Initializing Safe owners.
        address currentOwner = SENTINEL_OWNERS;
        for (uint256 i = 0; i < _owners.length; i++) {
            // Owner address cannot be null.
            address owner = _owners[i];
            require(owner != address(0) && owner != SENTINEL_OWNERS && owner != address(this) && currentOwner != owner, "GS203");
            // No duplicate owners allowed.
            require(owners[owner] == address(0), "GS204");
            owners[currentOwner] = owner;
            currentOwner = owner;
        }
        owners[currentOwner] = SENTINEL_OWNERS;
        ownerCount = _owners.length;
        threshold = _threshold;
    }
    /// @dev Allows to add a new owner to the Safe and update the threshold at the same time.
    ///      This can only be done via a Safe transaction.
    /// @notice Adds the owner `owner` to the Safe and updates the threshold to `_threshold`.
    /// @param owner New owner address.
    /// @param _threshold New threshold.
    function addOwnerWithThreshold(address owner, uint256 _threshold) public authorized {
        // Owner address cannot be null, the sentinel or the Safe itself.
        require(owner != address(0) && owner != SENTINEL_OWNERS && owner != address(this), "GS203");
        // No duplicate owners allowed.
        require(owners[owner] == address(0), "GS204");
        owners[owner] = owners[SENTINEL_OWNERS];
        owners[SENTINEL_OWNERS] = owner;
        ownerCount++;
        emit AddedOwner(owner);
        // Change threshold if threshold was changed.
        if (threshold != _threshold) changeThreshold(_threshold);
    }
    /// @dev Allows to remove an owner from the Safe and update the threshold at the same time.
    ///      This can only be done via a Safe transaction.
    /// @notice Removes the owner `owner` from the Safe and updates the threshold to `_threshold`.
    /// @param prevOwner Owner that pointed to the owner to be removed in the linked list
    /// @param owner Owner address to be removed.
    /// @param _threshold New threshold.
    function removeOwner(
        address prevOwner,
        address owner,
        uint256 _threshold
    ) public authorized {
        // Only allow to remove an owner, if threshold can still be reached.
        require(ownerCount - 1 >= _threshold, "GS201");
        // Validate owner address and check that it corresponds to owner index.
        require(owner != address(0) && owner != SENTINEL_OWNERS, "GS203");
        require(owners[prevOwner] == owner, "GS205");
        owners[prevOwner] = owners[owner];
        owners[owner] = address(0);
        ownerCount--;
        emit RemovedOwner(owner);
        // Change threshold if threshold was changed.
        if (threshold != _threshold) changeThreshold(_threshold);
    }
    /// @dev Allows to swap/replace an owner from the Safe with another address.
    ///      This can only be done via a Safe transaction.
    /// @notice Replaces the owner `oldOwner` in the Safe with `newOwner`.
    /// @param prevOwner Owner that pointed to the owner to be replaced in the linked list
    /// @param oldOwner Owner address to be replaced.
    /// @param newOwner New owner address.
    function swapOwner(
        address prevOwner,
        address oldOwner,
        address newOwner
    ) public authorized {
        // Owner address cannot be null, the sentinel or the Safe itself.
        require(newOwner != address(0) && newOwner != SENTINEL_OWNERS && newOwner != address(this), "GS203");
        // No duplicate owners allowed.
        require(owners[newOwner] == address(0), "GS204");
        // Validate oldOwner address and check that it corresponds to owner index.
        require(oldOwner != address(0) && oldOwner != SENTINEL_OWNERS, "GS203");
        require(owners[prevOwner] == oldOwner, "GS205");
        owners[newOwner] = owners[oldOwner];
        owners[prevOwner] = newOwner;
        owners[oldOwner] = address(0);
        emit RemovedOwner(oldOwner);
        emit AddedOwner(newOwner);
    }
    /// @dev Allows to update the number of required confirmations by Safe owners.
    ///      This can only be done via a Safe transaction.
    /// @notice Changes the threshold of the Safe to `_threshold`.
    /// @param _threshold New threshold.
    function changeThreshold(uint256 _threshold) public authorized {
        // Validate that threshold is smaller than number of owners.
        require(_threshold <= ownerCount, "GS201");
        // There has to be at least one Safe owner.
        require(_threshold >= 1, "GS202");
        threshold = _threshold;
        emit ChangedThreshold(threshold);
    }
    function getThreshold() public view returns (uint256) {
        return threshold;
    }
    function isOwner(address owner) public view returns (bool) {
        return owner != SENTINEL_OWNERS && owners[owner] != address(0);
    }
    /// @dev Returns array of owners.
    /// @return Array of Safe owners.
    function getOwners() public view returns (address[] memory) {
        address[] memory array = new address[](ownerCount);
        // populate return array
        uint256 index = 0;
        address currentOwner = owners[SENTINEL_OWNERS];
        while (currentOwner != SENTINEL_OWNERS) {
            array[index] = currentOwner;
            currentOwner = owners[currentOwner];
            index++;
        }
        return array;
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/// @title Enum - Collection of enums
/// @author Richard Meissner - <[email protected]>
contract Enum {
    enum Operation {Call, DelegateCall}
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/// @title EtherPaymentFallback - A contract that has a fallback to accept ether payments
/// @author Richard Meissner - <[email protected]>
contract EtherPaymentFallback {
    event SafeReceived(address indexed sender, uint256 value);
    /// @dev Fallback function accepts Ether transactions.
    receive() external payable {
        emit SafeReceived(msg.sender, msg.value);
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/// @title SecuredTokenTransfer - Secure token transfer
/// @author Richard Meissner - <[email protected]>
contract SecuredTokenTransfer {
    /// @dev Transfers a token and returns if it was a success
    /// @param token Token that should be transferred
    /// @param receiver Receiver to whom the token should be transferred
    /// @param amount The amount of tokens that should be transferred
    function transferToken(
        address token,
        address receiver,
        uint256 amount
    ) internal returns (bool transferred) {
        // 0xa9059cbb - keccack("transfer(address,uint256)")
        bytes memory data = abi.encodeWithSelector(0xa9059cbb, receiver, amount);
        // solhint-disable-next-line no-inline-assembly
        assembly {
            // We write the return value to scratch space.
            // See https://docs.soliditylang.org/en/v0.7.6/internals/layout_in_memory.html#layout-in-memory
            let success := call(sub(gas(), 10000), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            switch returndatasize()
                case 0 {
                    transferred := success
                }
                case 0x20 {
                    transferred := iszero(or(iszero(success), iszero(mload(0))))
                }
                default {
                    transferred := 0
                }
        }
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/// @title SelfAuthorized - authorizes current contract to perform actions
/// @author Richard Meissner - <[email protected]>
contract SelfAuthorized {
    function requireSelfCall() private view {
        require(msg.sender == address(this), "GS031");
    }
    modifier authorized() {
        // This is a function call as it minimized the bytecode size
        requireSelfCall();
        _;
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/// @title SignatureDecoder - Decodes signatures that a encoded as bytes
/// @author Richard Meissner - <[email protected]>
contract SignatureDecoder {
    /// @dev divides bytes signature into `uint8 v, bytes32 r, bytes32 s`.
    /// @notice Make sure to peform a bounds check for @param pos, to avoid out of bounds access on @param signatures
    /// @param pos which signature to read. A prior bounds check of this parameter should be performed, to avoid out of bounds access
    /// @param signatures concatenated rsv signatures
    function signatureSplit(bytes memory signatures, uint256 pos)
        internal
        pure
        returns (
            uint8 v,
            bytes32 r,
            bytes32 s
        )
    {
        // The signature format is a compact form of:
        //   {bytes32 r}{bytes32 s}{uint8 v}
        // Compact means, uint8 is not padded to 32 bytes.
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let signaturePos := mul(0x41, pos)
            r := mload(add(signatures, add(signaturePos, 0x20)))
            s := mload(add(signatures, add(signaturePos, 0x40)))
            // Here we are loading the last 32 bytes, including 31 bytes
            // of 's'. There is no 'mload8' to do this.
            //
            // 'byte' is not working due to the Solidity parser, so lets
            // use the second best option, 'and'
            v := and(mload(add(signatures, add(signaturePos, 0x41))), 0xff)
        }
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/// @title Singleton - Base for singleton contracts (should always be first super contract)
///         This contract is tightly coupled to our proxy contract (see `proxies/GnosisSafeProxy.sol`)
/// @author Richard Meissner - <[email protected]>
contract Singleton {
    // singleton always needs to be first declared variable, to ensure that it is at the same location as in the Proxy contract.
    // It should also always be ensured that the address is stored alone (uses a full word)
    address private singleton;
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/// @title StorageAccessible - generic base contract that allows callers to access all internal storage.
/// @notice See https://github.com/gnosis/util-contracts/blob/bb5fe5fb5df6d8400998094fb1b32a178a47c3a1/contracts/StorageAccessible.sol
contract StorageAccessible {
    /**
     * @dev Reads `length` bytes of storage in the currents contract
     * @param offset - the offset in the current contract's storage in words to start reading from
     * @param length - the number of words (32 bytes) of data to read
     * @return the bytes that were read.
     */
    function getStorageAt(uint256 offset, uint256 length) public view returns (bytes memory) {
        bytes memory result = new bytes(length * 32);
        for (uint256 index = 0; index < length; index++) {
            // solhint-disable-next-line no-inline-assembly
            assembly {
                let word := sload(add(offset, index))
                mstore(add(add(result, 0x20), mul(index, 0x20)), word)
            }
        }
        return result;
    }
    /**
     * @dev Performs a delegetecall on a targetContract in the context of self.
     * Internally reverts execution to avoid side effects (making it static).
     *
     * This method reverts with data equal to `abi.encode(bool(success), bytes(response))`.
     * Specifically, the `returndata` after a call to this method will be:
     * `success:bool || response.length:uint256 || response:bytes`.
     *
     * @param targetContract Address of the contract containing the code to execute.
     * @param calldataPayload Calldata that should be sent to the target contract (encoded method name and arguments).
     */
    function simulateAndRevert(address targetContract, bytes memory calldataPayload) external {
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let success := delegatecall(gas(), targetContract, add(calldataPayload, 0x20), mload(calldataPayload), 0, 0)
            mstore(0x00, success)
            mstore(0x20, returndatasize())
            returndatacopy(0x40, 0, returndatasize())
            revert(0, add(returndatasize(), 0x40))
        }
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
/**
 * @title GnosisSafeMath
 * @dev Math operations with safety checks that revert on error
 * Renamed from SafeMath to GnosisSafeMath to avoid conflicts
 * TODO: remove once open zeppelin update to solc 0.5.0
 */
library GnosisSafeMath {
    /**
     * @dev Multiplies two numbers, reverts on overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        require(c / a == b);
        return c;
    }
    /**
     * @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend).
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a);
        uint256 c = a - b;
        return c;
    }
    /**
     * @dev Adds two numbers, reverts on overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a);
        return c;
    }
    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }
}
// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.0 <0.9.0;
contract ISignatureValidatorConstants {
    // bytes4(keccak256("isValidSignature(bytes,bytes)")
    bytes4 internal constant EIP1271_MAGIC_VALUE = 0x20c13b0b;
}
abstract contract ISignatureValidator is ISignatureValidatorConstants {
    /**
     * @dev Should return whether the signature provided is valid for the provided data
     * @param _data Arbitrary length data signed on the behalf of address(this)
     * @param _signature Signature byte array associated with _data
     *
     * MUST return the bytes4 magic value 0x20c13b0b when function passes.
     * MUST NOT modify state (using STATICCALL for solc < 0.5, view modifier for solc > 0.5)
     * MUST allow external calls
     */
    function isValidSignature(bytes memory _data, bytes memory _signature) public view virtual returns (bytes4);
}