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// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "../libraries/AdminFallbackProxy.sol";
import "./IRollupAdmin.sol";
import "./Config.sol";

contract RollupProxy is AdminFallbackProxy {
    function initializeProxy(Config memory config, ContractDependencies memory connectedContracts)
        external
    {
        if (
            _getAdmin() == address(0) &&
            _getImplementation() == address(0) &&
            _getSecondaryImplementation() == address(0)
        ) {
            _initialize(
                address(connectedContracts.rollupAdminLogic),
                abi.encodeWithSelector(
                    IRollupAdmin.initialize.selector,
                    config,
                    connectedContracts
                ),
                address(connectedContracts.rollupUserLogic),
                abi.encodeWithSelector(IRollupUserAbs.initialize.selector, config.stakeToken),
                config.owner
            );
        } else {
            _fallback();
        }
    }
}

// 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 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 v4.5.0) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeacon.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._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967Upgrade {
    // 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 Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @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 Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @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 Emitted when the beacon is upgraded.
     */
    event BeaconUpgraded(address indexed beacon);

    /**
     * @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 (last updated v4.5.0) (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 overriden 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 internall 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 overriden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (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
     * ====
     *
     * [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://diligence.consensys.net/posts/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/v0.5.11/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 functionCall(target, data, "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");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason 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 {
            // 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

                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/StorageSlot.sol)

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:
 * ```
 * 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`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly {
            r.slot := slot
        }
    }
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

// solhint-disable-next-line compiler-version
pragma solidity >=0.6.9 <0.9.0;

import "./IOwnable.sol";

interface IBridge {
    event MessageDelivered(
        uint256 indexed messageIndex,
        bytes32 indexed beforeInboxAcc,
        address inbox,
        uint8 kind,
        address sender,
        bytes32 messageDataHash,
        uint256 baseFeeL1,
        uint64 timestamp
    );

    event BridgeCallTriggered(
        address indexed outbox,
        address indexed to,
        uint256 value,
        bytes data
    );

    event InboxToggle(address indexed inbox, bool enabled);

    event OutboxToggle(address indexed outbox, bool enabled);

    event SequencerInboxUpdated(address newSequencerInbox);

    event RollupUpdated(address rollup);

    function allowedDelayedInboxList(uint256) external returns (address);

    function allowedOutboxList(uint256) external returns (address);

    /// @dev Accumulator for delayed inbox messages; tail represents hash of the current state; each element represents the inclusion of a new message.
    function delayedInboxAccs(uint256) external view returns (bytes32);

    /// @dev Accumulator for sequencer inbox messages; tail represents hash of the current state; each element represents the inclusion of a new message.
    function sequencerInboxAccs(uint256) external view returns (bytes32);

    function rollup() external view returns (IOwnable);

    function sequencerInbox() external view returns (address);

    function activeOutbox() external view returns (address);

    function allowedDelayedInboxes(address inbox) external view returns (bool);

    function allowedOutboxes(address outbox) external view returns (bool);

    function sequencerReportedSubMessageCount() external view returns (uint256);

    function executeCall(
        address to,
        uint256 value,
        bytes calldata data
    ) external returns (bool success, bytes memory returnData);

    function delayedMessageCount() external view returns (uint256);

    function sequencerMessageCount() external view returns (uint256);

    // ---------- onlySequencerInbox functions ----------

    function enqueueSequencerMessage(
        bytes32 dataHash,
        uint256 afterDelayedMessagesRead,
        uint256 prevMessageCount,
        uint256 newMessageCount
    )
        external
        returns (
            uint256 seqMessageIndex,
            bytes32 beforeAcc,
            bytes32 delayedAcc,
            bytes32 acc
        );

    /**
     * @dev Allows the sequencer inbox to submit a delayed message of the batchPostingReport type
     *      This is done through a separate function entrypoint instead of allowing the sequencer inbox
     *      to call `enqueueDelayedMessage` to avoid the gas overhead of an extra SLOAD in either
     *      every delayed inbox or every sequencer inbox call.
     */
    function submitBatchSpendingReport(address batchPoster, bytes32 dataHash)
        external
        returns (uint256 msgNum);

    // ---------- onlyRollupOrOwner functions ----------

    function setSequencerInbox(address _sequencerInbox) external;

    function setDelayedInbox(address inbox, bool enabled) external;

    function setOutbox(address inbox, bool enabled) external;

    function updateRollupAddress(IOwnable _rollup) external;
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

// solhint-disable-next-line compiler-version
pragma solidity >=0.6.9 <0.9.0;

interface IDelayedMessageProvider {
    /// @dev event emitted when a inbox message is added to the Bridge's delayed accumulator
    event InboxMessageDelivered(uint256 indexed messageNum, bytes data);

    /// @dev event emitted when a inbox message is added to the Bridge's delayed accumulator
    /// same as InboxMessageDelivered but the batch data is available in tx.input
    event InboxMessageDeliveredFromOrigin(uint256 indexed messageNum);
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

// solhint-disable-next-line compiler-version
pragma solidity >=0.6.9 <0.9.0;

import "./IBridge.sol";
import "./IDelayedMessageProvider.sol";
import "./ISequencerInbox.sol";

interface IInboxBase is IDelayedMessageProvider {
    function bridge() external view returns (IBridge);

    function sequencerInbox() external view returns (ISequencerInbox);

    function maxDataSize() external view returns (uint256);

    /**
     * @notice Send a generic L2 message to the chain
     * @dev This method is an optimization to avoid having to emit the entirety of the messageData in a log. Instead validators are expected to be able to parse the data from the transaction's input
     * @param messageData Data of the message being sent
     */
    function sendL2MessageFromOrigin(bytes calldata messageData) external returns (uint256);

    /**
     * @notice Send a generic L2 message to the chain
     * @dev This method can be used to send any type of message that doesn't require L1 validation
     * @param messageData Data of the message being sent
     */
    function sendL2Message(bytes calldata messageData) external returns (uint256);

    function sendUnsignedTransaction(
        uint256 gasLimit,
        uint256 maxFeePerGas,
        uint256 nonce,
        address to,
        uint256 value,
        bytes calldata data
    ) external returns (uint256);

    function sendContractTransaction(
        uint256 gasLimit,
        uint256 maxFeePerGas,
        address to,
        uint256 value,
        bytes calldata data
    ) external returns (uint256);

    /**
     * @notice Get the L1 fee for submitting a retryable
     * @dev This fee can be paid by funds already in the L2 aliased address or by the current message value
     * @dev This formula may change in the future, to future proof your code query this method instead of inlining!!
     * @param dataLength The length of the retryable's calldata, in bytes
     * @param baseFee The block basefee when the retryable is included in the chain, if 0 current block.basefee will be used
     */
    function calculateRetryableSubmissionFee(uint256 dataLength, uint256 baseFee)
        external
        view
        returns (uint256);

    // ---------- onlyRollupOrOwner functions ----------

    /// @notice pauses all inbox functionality
    function pause() external;

    /// @notice unpauses all inbox functionality
    function unpause() external;

    /// @notice add or remove users from allowList
    function setAllowList(address[] memory user, bool[] memory val) external;

    /// @notice enable or disable allowList
    function setAllowListEnabled(bool _allowListEnabled) external;

    /// @notice check if user is in allowList
    function isAllowed(address user) external view returns (bool);

    /// @notice check if allowList is enabled
    function allowListEnabled() external view returns (bool);

    function initialize(IBridge _bridge, ISequencerInbox _sequencerInbox) external;

    /// @notice returns the current admin
    function getProxyAdmin() external view returns (address);
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

// solhint-disable-next-line compiler-version
pragma solidity >=0.6.9 <0.9.0;

import "./IBridge.sol";

interface IOutbox {
    event SendRootUpdated(bytes32 indexed outputRoot, bytes32 indexed l2BlockHash);
    event OutBoxTransactionExecuted(
        address indexed to,
        address indexed l2Sender,
        uint256 indexed zero,
        uint256 transactionIndex
    );

    function initialize(IBridge _bridge) external;

    function rollup() external view returns (address); // the rollup contract

    function bridge() external view returns (IBridge); // the bridge contract

    function spent(uint256) external view returns (bytes32); // packed spent bitmap

    function roots(bytes32) external view returns (bytes32); // maps root hashes => L2 block hash

    // solhint-disable-next-line func-name-mixedcase
    function OUTBOX_VERSION() external view returns (uint128); // the outbox version

    function updateSendRoot(bytes32 sendRoot, bytes32 l2BlockHash) external;

    function updateRollupAddress() external;

    /// @notice When l2ToL1Sender returns a nonzero address, the message was originated by an L2 account
    ///         When the return value is zero, that means this is a system message
    /// @dev the l2ToL1Sender behaves as the tx.origin, the msg.sender should be validated to protect against reentrancies
    function l2ToL1Sender() external view returns (address);

    /// @return l2Block return L2 block when the L2 tx was initiated or 0 if no L2 to L1 transaction is active
    function l2ToL1Block() external view returns (uint256);

    /// @return l1Block return L1 block when the L2 tx was initiated or 0 if no L2 to L1 transaction is active
    function l2ToL1EthBlock() external view returns (uint256);

    /// @return timestamp return L2 timestamp when the L2 tx was initiated or 0 if no L2 to L1 transaction is active
    function l2ToL1Timestamp() external view returns (uint256);

    /// @return outputId returns the unique output identifier of the L2 to L1 tx or 0 if no L2 to L1 transaction is active
    function l2ToL1OutputId() external view returns (bytes32);

    /**
     * @notice Executes a messages in an Outbox entry.
     * @dev Reverts if dispute period hasn't expired, since the outbox entry
     *      is only created once the rollup confirms the respective assertion.
     * @dev it is not possible to execute any L2-to-L1 transaction which contains data
     *      to a contract address without any code (as enforced by the Bridge contract).
     * @param proof Merkle proof of message inclusion in send root
     * @param index Merkle path to message
     * @param l2Sender sender if original message (i.e., caller of ArbSys.sendTxToL1)
     * @param to destination address for L1 contract call
     * @param l2Block l2 block number at which sendTxToL1 call was made
     * @param l1Block l1 block number at which sendTxToL1 call was made
     * @param l2Timestamp l2 Timestamp at which sendTxToL1 call was made
     * @param value wei in L1 message
     * @param data abi-encoded L1 message data
     */
    function executeTransaction(
        bytes32[] calldata proof,
        uint256 index,
        address l2Sender,
        address to,
        uint256 l2Block,
        uint256 l1Block,
        uint256 l2Timestamp,
        uint256 value,
        bytes calldata data
    ) external;

    /**
     *  @dev function used to simulate the result of a particular function call from the outbox
     *       it is useful for things such as gas estimates. This function includes all costs except for
     *       proof validation (which can be considered offchain as a somewhat of a fixed cost - it's
     *       not really a fixed cost, but can be treated as so with a fixed overhead for gas estimation).
     *       We can't include the cost of proof validation since this is intended to be used to simulate txs
     *       that are included in yet-to-be confirmed merkle roots. The simulation entrypoint could instead pretend
     *       to confirm a pending merkle root, but that would be less practical for integrating with tooling.
     *       It is only possible to trigger it when the msg sender is address zero, which should be impossible
     *       unless under simulation in an eth_call or eth_estimateGas
     */
    function executeTransactionSimulation(
        uint256 index,
        address l2Sender,
        address to,
        uint256 l2Block,
        uint256 l1Block,
        uint256 l2Timestamp,
        uint256 value,
        bytes calldata data
    ) external;

    /**
     * @param index Merkle path to message
     * @return true if the message has been spent
     */
    function isSpent(uint256 index) external view returns (bool);

    function calculateItemHash(
        address l2Sender,
        address to,
        uint256 l2Block,
        uint256 l1Block,
        uint256 l2Timestamp,
        uint256 value,
        bytes calldata data
    ) external pure returns (bytes32);

    function calculateMerkleRoot(
        bytes32[] memory proof,
        uint256 path,
        bytes32 item
    ) external pure returns (bytes32);

    /**
     * @dev function to be called one time during the outbox upgrade process
     *      this is used to fix the storage slots
     */
    function postUpgradeInit() external;
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

// solhint-disable-next-line compiler-version
pragma solidity >=0.4.21 <0.9.0;

interface IOwnable {
    function owner() external view returns (address);
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

// solhint-disable-next-line compiler-version
pragma solidity >=0.6.9 <0.9.0;
pragma experimental ABIEncoderV2;

import "../libraries/IGasRefunder.sol";
import "./IDelayedMessageProvider.sol";
import "./IBridge.sol";

interface ISequencerInbox is IDelayedMessageProvider {
    struct MaxTimeVariation {
        uint256 delayBlocks;
        uint256 futureBlocks;
        uint256 delaySeconds;
        uint256 futureSeconds;
    }

    struct TimeBounds {
        uint64 minTimestamp;
        uint64 maxTimestamp;
        uint64 minBlockNumber;
        uint64 maxBlockNumber;
    }

    enum BatchDataLocation {
        TxInput,
        SeparateBatchEvent,
        NoData
    }

    event SequencerBatchDelivered(
        uint256 indexed batchSequenceNumber,
        bytes32 indexed beforeAcc,
        bytes32 indexed afterAcc,
        bytes32 delayedAcc,
        uint256 afterDelayedMessagesRead,
        TimeBounds timeBounds,
        BatchDataLocation dataLocation
    );

    event OwnerFunctionCalled(uint256 indexed id);

    /// @dev a separate event that emits batch data when this isn't easily accessible in the tx.input
    event SequencerBatchData(uint256 indexed batchSequenceNumber, bytes data);

    /// @dev a valid keyset was added
    event SetValidKeyset(bytes32 indexed keysetHash, bytes keysetBytes);

    /// @dev a keyset was invalidated
    event InvalidateKeyset(bytes32 indexed keysetHash);

    function totalDelayedMessagesRead() external view returns (uint256);

    function bridge() external view returns (IBridge);

    /// @dev The size of the batch header
    // solhint-disable-next-line func-name-mixedcase
    function HEADER_LENGTH() external view returns (uint256);

    /// @dev If the first batch data byte after the header has this bit set,
    ///      the sequencer inbox has authenticated the data. Currently not used.
    // solhint-disable-next-line func-name-mixedcase
    function DATA_AUTHENTICATED_FLAG() external view returns (bytes1);

    function rollup() external view returns (IOwnable);

    function isBatchPoster(address) external view returns (bool);

    function isSequencer(address) external view returns (bool);

    function maxDataSize() external view returns (uint256);

    struct DasKeySetInfo {
        bool isValidKeyset;
        uint64 creationBlock;
    }

    function maxTimeVariation()
        external
        view
        returns (
            uint256,
            uint256,
            uint256,
            uint256
        );

    function dasKeySetInfo(bytes32) external view returns (bool, uint64);

    /// @notice Remove force inclusion delay after a L1 chainId fork
    function removeDelayAfterFork() external;

    /// @notice Force messages from the delayed inbox to be included in the chain
    ///         Callable by any address, but message can only be force-included after maxTimeVariation.delayBlocks and
    ///         maxTimeVariation.delaySeconds has elapsed. As part of normal behaviour the sequencer will include these
    ///         messages so it's only necessary to call this if the sequencer is down, or not including any delayed messages.
    /// @param _totalDelayedMessagesRead The total number of messages to read up to
    /// @param kind The kind of the last message to be included
    /// @param l1BlockAndTime The l1 block and the l1 timestamp of the last message to be included
    /// @param baseFeeL1 The l1 gas price of the last message to be included
    /// @param sender The sender of the last message to be included
    /// @param messageDataHash The messageDataHash of the last message to be included
    function forceInclusion(
        uint256 _totalDelayedMessagesRead,
        uint8 kind,
        uint64[2] calldata l1BlockAndTime,
        uint256 baseFeeL1,
        address sender,
        bytes32 messageDataHash
    ) external;

    function inboxAccs(uint256 index) external view returns (bytes32);

    function batchCount() external view returns (uint256);

    function isValidKeysetHash(bytes32 ksHash) external view returns (bool);

    /// @notice the creation block is intended to still be available after a keyset is deleted
    function getKeysetCreationBlock(bytes32 ksHash) external view returns (uint256);

    // ---------- BatchPoster functions ----------

    function addSequencerL2BatchFromOrigin(
        uint256 sequenceNumber,
        bytes calldata data,
        uint256 afterDelayedMessagesRead,
        IGasRefunder gasRefunder
    ) external;

    function addSequencerL2Batch(
        uint256 sequenceNumber,
        bytes calldata data,
        uint256 afterDelayedMessagesRead,
        IGasRefunder gasRefunder,
        uint256 prevMessageCount,
        uint256 newMessageCount
    ) external;

    // ---------- onlyRollupOrOwner functions ----------

    /**
     * @notice Set max delay for sequencer inbox
     * @param maxTimeVariation_ the maximum time variation parameters
     */
    function setMaxTimeVariation(MaxTimeVariation memory maxTimeVariation_) external;

    /**
     * @notice Updates whether an address is authorized to be a batch poster at the sequencer inbox
     * @param addr the address
     * @param isBatchPoster_ if the specified address should be authorized as a batch poster
     */
    function setIsBatchPoster(address addr, bool isBatchPoster_) external;

    /**
     * @notice Makes Data Availability Service keyset valid
     * @param keysetBytes bytes of the serialized keyset
     */
    function setValidKeyset(bytes calldata keysetBytes) external;

    /**
     * @notice Invalidates a Data Availability Service keyset
     * @param ksHash hash of the keyset
     */
    function invalidateKeysetHash(bytes32 ksHash) external;

    /**
     * @notice Updates whether an address is authorized to be a sequencer.
     * @dev The IsSequencer information is used only off-chain by the nitro node to validate sequencer feed signer.
     * @param addr the address
     * @param isSequencer_ if the specified address should be authorized as a sequencer
     */
    function setIsSequencer(address addr, bool isSequencer_) external;

    // ---------- initializer ----------

    function initialize(IBridge bridge_, MaxTimeVariation calldata maxTimeVariation_) external;

    function updateRollupAddress() external;
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "../state/Machine.sol";
import "../state/GlobalState.sol";

library ChallengeLib {
    using MachineLib for Machine;
    using ChallengeLib for Challenge;

    /// @dev It's assumed that that uninitialzed challenges have mode NONE
    enum ChallengeMode {
        NONE,
        BLOCK,
        EXECUTION
    }

    struct Participant {
        address addr;
        uint256 timeLeft;
    }

    struct Challenge {
        Participant current;
        Participant next;
        uint256 lastMoveTimestamp;
        bytes32 wasmModuleRoot;
        bytes32 challengeStateHash;
        uint64 maxInboxMessages;
        ChallengeMode mode;
    }

    struct SegmentSelection {
        uint256 oldSegmentsStart;
        uint256 oldSegmentsLength;
        bytes32[] oldSegments;
        uint256 challengePosition;
    }

    function timeUsedSinceLastMove(Challenge storage challenge) internal view returns (uint256) {
        return block.timestamp - challenge.lastMoveTimestamp;
    }

    function isTimedOut(Challenge storage challenge) internal view returns (bool) {
        return challenge.timeUsedSinceLastMove() > challenge.current.timeLeft;
    }

    function getStartMachineHash(bytes32 globalStateHash, bytes32 wasmModuleRoot)
        internal
        pure
        returns (bytes32)
    {
        // Start the value stack with the function call ABI for the entrypoint
        Value[] memory startingValues = new Value[](3);
        startingValues[0] = ValueLib.newRefNull();
        startingValues[1] = ValueLib.newI32(0);
        startingValues[2] = ValueLib.newI32(0);
        ValueArray memory valuesArray = ValueArray({inner: startingValues});
        ValueStack memory values = ValueStack({proved: valuesArray, remainingHash: 0});
        ValueStack memory internalStack;
        StackFrameWindow memory frameStack;

        Machine memory mach = Machine({
            status: MachineStatus.RUNNING,
            valueStack: values,
            internalStack: internalStack,
            frameStack: frameStack,
            globalStateHash: globalStateHash,
            moduleIdx: 0,
            functionIdx: 0,
            functionPc: 0,
            modulesRoot: wasmModuleRoot
        });
        return mach.hash();
    }

    function getEndMachineHash(MachineStatus status, bytes32 globalStateHash)
        internal
        pure
        returns (bytes32)
    {
        if (status == MachineStatus.FINISHED) {
            return keccak256(abi.encodePacked("Machine finished:", globalStateHash));
        } else if (status == MachineStatus.ERRORED) {
            return keccak256(abi.encodePacked("Machine errored:"));
        } else if (status == MachineStatus.TOO_FAR) {
            return keccak256(abi.encodePacked("Machine too far:"));
        } else {
            revert("BAD_BLOCK_STATUS");
        }
    }

    function extractChallengeSegment(SegmentSelection calldata selection)
        internal
        pure
        returns (uint256 segmentStart, uint256 segmentLength)
    {
        uint256 oldChallengeDegree = selection.oldSegments.length - 1;
        segmentLength = selection.oldSegmentsLength / oldChallengeDegree;
        // Intentionally done before challengeLength is potentially added to for the final segment
        segmentStart = selection.oldSegmentsStart + segmentLength * selection.challengePosition;
        if (selection.challengePosition == selection.oldSegments.length - 2) {
            segmentLength += selection.oldSegmentsLength % oldChallengeDegree;
        }
    }

    function hashChallengeState(
        uint256 segmentsStart,
        uint256 segmentsLength,
        bytes32[] memory segments
    ) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked(segmentsStart, segmentsLength, segments));
    }

    function blockStateHash(MachineStatus status, bytes32 globalStateHash)
        internal
        pure
        returns (bytes32)
    {
        if (status == MachineStatus.FINISHED) {
            return keccak256(abi.encodePacked("Block state:", globalStateHash));
        } else if (status == MachineStatus.ERRORED) {
            return keccak256(abi.encodePacked("Block state, errored:", globalStateHash));
        } else if (status == MachineStatus.TOO_FAR) {
            return keccak256(abi.encodePacked("Block state, too far:"));
        } else {
            revert("BAD_BLOCK_STATUS");
        }
    }
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "../state/Machine.sol";
import "../bridge/IBridge.sol";
import "../bridge/ISequencerInbox.sol";
import "../osp/IOneStepProofEntry.sol";

import "./IChallengeResultReceiver.sol";

import "./ChallengeLib.sol";

interface IChallengeManager {
    enum ChallengeTerminationType {
        TIMEOUT,
        BLOCK_PROOF,
        EXECUTION_PROOF,
        CLEARED
    }

    event InitiatedChallenge(
        uint64 indexed challengeIndex,
        GlobalState startState,
        GlobalState endState
    );

    event Bisected(
        uint64 indexed challengeIndex,
        bytes32 indexed challengeRoot,
        uint256 challengedSegmentStart,
        uint256 challengedSegmentLength,
        bytes32[] chainHashes
    );

    event ExecutionChallengeBegun(uint64 indexed challengeIndex, uint256 blockSteps);
    event OneStepProofCompleted(uint64 indexed challengeIndex);

    event ChallengeEnded(uint64 indexed challengeIndex, ChallengeTerminationType kind);

    function initialize(
        IChallengeResultReceiver resultReceiver_,
        ISequencerInbox sequencerInbox_,
        IBridge bridge_,
        IOneStepProofEntry osp_
    ) external;

    function createChallenge(
        bytes32 wasmModuleRoot_,
        MachineStatus[2] calldata startAndEndMachineStatuses_,
        GlobalState[2] calldata startAndEndGlobalStates_,
        uint64 numBlocks,
        address asserter_,
        address challenger_,
        uint256 asserterTimeLeft_,
        uint256 challengerTimeLeft_
    ) external returns (uint64);

    function challengeInfo(uint64 challengeIndex_)
        external
        view
        returns (ChallengeLib.Challenge memory);

    function currentResponder(uint64 challengeIndex) external view returns (address);

    function isTimedOut(uint64 challengeIndex) external view returns (bool);

    function clearChallenge(uint64 challengeIndex_) external;

    function timeout(uint64 challengeIndex_) external;
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

interface IChallengeResultReceiver {
    function completeChallenge(
        uint256 challengeIndex,
        address winner,
        address loser
    ) external;
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/proxy/ERC1967/ERC1967Upgrade.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";

/// @notice An extension to OZ's ERC1967Upgrade implementation to support two logic contracts
abstract contract DoubleLogicERC1967Upgrade is ERC1967Upgrade {
    // This is the keccak-256 hash of "eip1967.proxy.implementation.secondary" subtracted by 1
    bytes32 internal constant _IMPLEMENTATION_SECONDARY_SLOT =
        0x2b1dbce74324248c222f0ec2d5ed7bd323cfc425b336f0253c5ccfda7265546d;

    // This is the keccak-256 hash of "eip1967.proxy.rollback.secondary" subtracted by 1
    bytes32 private constant _ROLLBACK_SECONDARY_SLOT =
        0x49bd798cd84788856140a4cd5030756b4d08a9e4d55db725ec195f232d262a89;

    /**
     * @dev Emitted when the secondary implementation is upgraded.
     */
    event UpgradedSecondary(address indexed implementation);

    /**
     * @dev Returns the current secondary implementation address.
     */
    function _getSecondaryImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SECONDARY_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setSecondaryImplementation(address newImplementation) private {
        require(
            Address.isContract(newImplementation),
            "ERC1967: new secondary implementation is not a contract"
        );
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SECONDARY_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform secondary implementation upgrade
     *
     * Emits an {UpgradedSecondary} event.
     */
    function _upgradeSecondaryTo(address newImplementation) internal {
        _setSecondaryImplementation(newImplementation);
        emit UpgradedSecondary(newImplementation);
    }

    /**
     * @dev Perform secondary implementation upgrade with additional setup call.
     *
     * Emits an {UpgradedSecondary} event.
     */
    function _upgradeSecondaryToAndCall(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        _upgradeSecondaryTo(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform secondary implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {UpgradedSecondary} event.
     */
    function _upgradeSecondaryToAndCallUUPS(
        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_SECONDARY_SLOT).value) {
            _setSecondaryImplementation(newImplementation);
        } else {
            try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(
                    slot == _IMPLEMENTATION_SECONDARY_SLOT,
                    "ERC1967Upgrade: unsupported secondary proxiableUUID"
                );
            } catch {
                revert("ERC1967Upgrade: new secondary implementation is not UUPS");
            }
            _upgradeSecondaryToAndCall(newImplementation, data, forceCall);
        }
    }
}

/// @notice similar to TransparentUpgradeableProxy but allows the admin to fallback to a separate logic contract using DoubleLogicERC1967Upgrade
/// @dev this follows the UUPS pattern for upgradeability - read more at https://github.com/OpenZeppelin/openzeppelin-contracts/tree/v4.5.0/contracts/proxy#transparent-vs-uups-proxies
contract AdminFallbackProxy is Proxy, DoubleLogicERC1967Upgrade {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `adminLogic` and a secondary
     * logic implementation specified by `userLogic`
     *
     * Only the `adminAddr` is able to use the `adminLogic` functions
     * All other addresses can interact with the `userLogic` functions
     */
    function _initialize(
        address adminLogic,
        bytes memory adminData,
        address userLogic,
        bytes memory userData,
        address adminAddr
    ) internal {
        assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1));
        assert(
            _IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1)
        );
        assert(
            _IMPLEMENTATION_SECONDARY_SLOT ==
                bytes32(uint256(keccak256("eip1967.proxy.implementation.secondary")) - 1)
        );
        _changeAdmin(adminAddr);
        _upgradeToAndCall(adminLogic, adminData, false);
        _upgradeSecondaryToAndCall(userLogic, userData, false);
    }

    /// @inheritdoc Proxy
    function _implementation() internal view override returns (address) {
        require(msg.data.length >= 4, "NO_FUNC_SIG");
        // if the sender is the proxy's admin, delegate to admin logic
        // if the admin is disabled, all calls will be forwarded to user logic
        // admin affordances can be disabled by setting to a no-op smart contract
        // since there is a check for contract code before updating the value
        address target = _getAdmin() != msg.sender
            ? DoubleLogicERC1967Upgrade._getSecondaryImplementation()
            : ERC1967Upgrade._getImplementation();
        // implementation setters do an existence check, but we protect against selfdestructs this way
        require(Address.isContract(target), "TARGET_NOT_CONTRACT");
        return target;
    }

    /**
     * @dev unlike transparent upgradeable proxies, this does allow the admin to fallback to a logic contract
     * the admin is expected to interact only with the primary logic contract, which handles contract
     * upgrades using the UUPS approach
     */
    function _beforeFallback() internal override {
        super._beforeFallback();
    }
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

// solhint-disable-next-line compiler-version
pragma solidity >=0.6.9 <0.9.0;

interface IGasRefunder {
    function onGasSpent(
        address payable spender,
        uint256 gasUsed,
        uint256 calldataSize
    ) external returns (bool success);
}

abstract contract GasRefundEnabled {
    /// @dev this refunds the sender for execution costs of the tx
    /// calldata costs are only refunded if `msg.sender == tx.origin` to guarantee the value refunded relates to charging
    /// for the `tx.input`. this avoids a possible attack where you generate large calldata from a contract and get over-refunded
    modifier refundsGas(IGasRefunder gasRefunder) {
        uint256 startGasLeft = gasleft();
        _;
        if (address(gasRefunder) != address(0)) {
            uint256 calldataSize = msg.data.length;
            uint256 calldataWords = (calldataSize + 31) / 32;
            // account for the CALLDATACOPY cost of the proxy contract, including the memory expansion cost
            startGasLeft += calldataWords * 6 + (calldataWords**2) / 512;
            // if triggered in a contract call, the spender may be overrefunded by appending dummy data to the call
            // so we check if it is a top level call, which would mean the sender paid calldata as part of tx.input
            // solhint-disable-next-line avoid-tx-origin
            if (msg.sender != tx.origin) {
                // We can't be sure if this calldata came from the top level tx,
                // so to be safe we tell the gas refunder there was no calldata.
                calldataSize = 0;
            }
            gasRefunder.onGasSpent(payable(msg.sender), startGasLeft - gasleft(), calldataSize);
        }
    }
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "./IOneStepProver.sol";

library OneStepProofEntryLib {
    uint256 internal constant MAX_STEPS = 1 << 43;
}

interface IOneStepProofEntry {
    function proveOneStep(
        ExecutionContext calldata execCtx,
        uint256 machineStep,
        bytes32 beforeHash,
        bytes calldata proof
    ) external view returns (bytes32 afterHash);
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "../state/Machine.sol";
import "../state/Module.sol";
import "../state/Instructions.sol";
import "../state/GlobalState.sol";
import "../bridge/ISequencerInbox.sol";
import "../bridge/IBridge.sol";

struct ExecutionContext {
    uint256 maxInboxMessagesRead;
    IBridge bridge;
}

abstract contract IOneStepProver {
    function executeOneStep(
        ExecutionContext memory execCtx,
        Machine calldata mach,
        Module calldata mod,
        Instruction calldata instruction,
        bytes calldata proof
    ) external view virtual returns (Machine memory result, Module memory resultMod);
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "../state/GlobalState.sol";
import "../state/Machine.sol";
import "../bridge/ISequencerInbox.sol";
import "../bridge/IBridge.sol";
import "../bridge/IOutbox.sol";
import "../bridge/IInboxBase.sol";
import "./IRollupEventInbox.sol";
import "./IRollupLogic.sol";
import "../challenge/IChallengeManager.sol";

struct Config {
    uint64 confirmPeriodBlocks;
    uint64 extraChallengeTimeBlocks;
    address stakeToken;
    uint256 baseStake;
    bytes32 wasmModuleRoot;
    address owner;
    address loserStakeEscrow;
    uint256 chainId;
    string chainConfig;
    uint64 genesisBlockNum;
    ISequencerInbox.MaxTimeVariation sequencerInboxMaxTimeVariation;
}

struct ContractDependencies {
    IBridge bridge;
    ISequencerInbox sequencerInbox;
    IInboxBase inbox;
    IOutbox outbox;
    IRollupEventInbox rollupEventInbox;
    IChallengeManager challengeManager;
    address rollupAdminLogic;
    IRollupUser rollupUserLogic;
    // misc contracts that are useful when interacting with the rollup
    address validatorUtils;
    address validatorWalletCreator;
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "./IRollupCore.sol";
import "../bridge/ISequencerInbox.sol";
import "../bridge/IOutbox.sol";
import "../bridge/IOwnable.sol";
import "./Config.sol";

interface IRollupAdmin {
    event OwnerFunctionCalled(uint256 indexed id);

    function initialize(Config calldata config, ContractDependencies calldata connectedContracts)
        external;

    /**
     * @notice Add a contract authorized to put messages into this rollup's inbox
     * @param _outbox Outbox contract to add
     */
    function setOutbox(IOutbox _outbox) external;

    /**
     * @notice Disable an old outbox from interacting with the bridge
     * @param _outbox Outbox contract to remove
     */
    function removeOldOutbox(address _outbox) external;

    /**
     * @notice Enable or disable an inbox contract
     * @param _inbox Inbox contract to add or remove
     * @param _enabled New status of inbox
     */
    function setDelayedInbox(address _inbox, bool _enabled) external;

    /**
     * @notice Pause interaction with the rollup contract
     */
    function pause() external;

    /**
     * @notice Resume interaction with the rollup contract
     */
    function resume() external;

    /**
     * @notice Set the addresses of the validator whitelist
     * @dev It is expected that both arrays are same length, and validator at
     * position i corresponds to the value at position i
     * @param _validator addresses to set in the whitelist
     * @param _val value to set in the whitelist for corresponding address
     */
    function setValidator(address[] memory _validator, bool[] memory _val) external;

    /**
     * @notice Set a new owner address for the rollup proxy
     * @param newOwner address of new rollup owner
     */
    function setOwner(address newOwner) external;

    /**
     * @notice Set minimum assertion period for the rollup
     * @param newPeriod new minimum period for assertions
     */
    function setMinimumAssertionPeriod(uint256 newPeriod) external;

    /**
     * @notice Set number of blocks until a node is considered confirmed
     * @param newConfirmPeriod new number of blocks until a node is confirmed
     */
    function setConfirmPeriodBlocks(uint64 newConfirmPeriod) external;

    /**
     * @notice Set number of extra blocks after a challenge
     * @param newExtraTimeBlocks new number of blocks
     */
    function setExtraChallengeTimeBlocks(uint64 newExtraTimeBlocks) external;

    /**
     * @notice Set base stake required for an assertion
     * @param newBaseStake maximum avmgas to be used per block
     */
    function setBaseStake(uint256 newBaseStake) external;

    /**
     * @notice Set the token used for stake, where address(0) == eth
     * @dev Before changing the base stake token, you might need to change the
     * implementation of the Rollup User logic!
     * @param newStakeToken address of token used for staking
     */
    function setStakeToken(address newStakeToken) external;

    /**
     * @notice Upgrades the implementation of a beacon controlled by the rollup
     * @param beacon address of beacon to be upgraded
     * @param newImplementation new address of implementation
     */
    function upgradeBeacon(address beacon, address newImplementation) external;

    function forceResolveChallenge(address[] memory stackerA, address[] memory stackerB) external;

    function forceRefundStaker(address[] memory stacker) external;

    function forceCreateNode(
        uint64 prevNode,
        uint256 prevNodeInboxMaxCount,
        Assertion memory assertion,
        bytes32 expectedNodeHash
    ) external;

    function forceConfirmNode(
        uint64 nodeNum,
        bytes32 blockHash,
        bytes32 sendRoot
    ) external;

    function setLoserStakeEscrow(address newLoserStakerEscrow) external;

    /**
     * @notice Set the proving WASM module root
     * @param newWasmModuleRoot new module root
     */
    function setWasmModuleRoot(bytes32 newWasmModuleRoot) external;

    /**
     * @notice set a new sequencer inbox contract
     * @param _sequencerInbox new address of sequencer inbox
     */
    function setSequencerInbox(address _sequencerInbox) external;

    /**
     * @notice set the validatorWhitelistDisabled flag
     * @param _validatorWhitelistDisabled new value of validatorWhitelistDisabled, i.e. true = disabled
     */
    function setValidatorWhitelistDisabled(bool _validatorWhitelistDisabled) external;
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "./Node.sol";
import "../bridge/IBridge.sol";
import "../bridge/IOutbox.sol";
import "../bridge/IInboxBase.sol";
import "./IRollupEventInbox.sol";
import "../challenge/IChallengeManager.sol";

interface IRollupCore {
    struct Staker {
        uint256 amountStaked;
        uint64 index;
        uint64 latestStakedNode;
        // currentChallenge is 0 if staker is not in a challenge
        uint64 currentChallenge;
        bool isStaked;
    }

    event RollupInitialized(bytes32 machineHash, uint256 chainId);

    event NodeCreated(
        uint64 indexed nodeNum,
        bytes32 indexed parentNodeHash,
        bytes32 indexed nodeHash,
        bytes32 executionHash,
        Assertion assertion,
        bytes32 afterInboxBatchAcc,
        bytes32 wasmModuleRoot,
        uint256 inboxMaxCount
    );

    event NodeConfirmed(uint64 indexed nodeNum, bytes32 blockHash, bytes32 sendRoot);

    event NodeRejected(uint64 indexed nodeNum);

    event RollupChallengeStarted(
        uint64 indexed challengeIndex,
        address asserter,
        address challenger,
        uint64 challengedNode
    );

    event UserStakeUpdated(address indexed user, uint256 initialBalance, uint256 finalBalance);

    event UserWithdrawableFundsUpdated(
        address indexed user,
        uint256 initialBalance,
        uint256 finalBalance
    );

    function confirmPeriodBlocks() external view returns (uint64);

    function extraChallengeTimeBlocks() external view returns (uint64);

    function chainId() external view returns (uint256);

    function baseStake() external view returns (uint256);

    function wasmModuleRoot() external view returns (bytes32);

    function bridge() external view returns (IBridge);

    function sequencerInbox() external view returns (ISequencerInbox);

    function outbox() external view returns (IOutbox);

    function rollupEventInbox() external view returns (IRollupEventInbox);

    function challengeManager() external view returns (IChallengeManager);

    function loserStakeEscrow() external view returns (address);

    function stakeToken() external view returns (address);

    function minimumAssertionPeriod() external view returns (uint256);

    function isValidator(address) external view returns (bool);

    function validatorWhitelistDisabled() external view returns (bool);

    /**
     * @notice Get the Node for the given index.
     */
    function getNode(uint64 nodeNum) external view returns (Node memory);

    /**
     * @notice Returns the block in which the given node was created for looking up its creation event.
     * Unlike the Node's createdAtBlock field, this will be the ArbSys blockNumber if the host chain is an Arbitrum chain.
     * That means that the block number returned for this is usable for event queries.
     * This function will revert if the given node number does not exist.
     * @dev This function is meant for internal use only and has no stability guarantees.
     */
    function getNodeCreationBlockForLogLookup(uint64 nodeNum) external view returns (uint256);

    /**
     * @notice Check if the specified node has been staked on by the provided staker.
     * Only accurate at the latest confirmed node and afterwards.
     */
    function nodeHasStaker(uint64 nodeNum, address staker) external view returns (bool);

    /**
     * @notice Get the address of the staker at the given index
     * @param stakerNum Index of the staker
     * @return Address of the staker
     */
    function getStakerAddress(uint64 stakerNum) external view returns (address);

    /**
     * @notice Check whether the given staker is staked
     * @param staker Staker address to check
     * @return True or False for whether the staker was staked
     */
    function isStaked(address staker) external view returns (bool);

    /**
     * @notice Get the latest staked node of the given staker
     * @param staker Staker address to lookup
     * @return Latest node staked of the staker
     */
    function latestStakedNode(address staker) external view returns (uint64);

    /**
     * @notice Get the current challenge of the given staker
     * @param staker Staker address to lookup
     * @return Current challenge of the staker
     */
    function currentChallenge(address staker) external view returns (uint64);

    /**
     * @notice Get the amount staked of the given staker
     * @param staker Staker address to lookup
     * @return Amount staked of the staker
     */
    function amountStaked(address staker) external view returns (uint256);

    /**
     * @notice Retrieves stored information about a requested staker
     * @param staker Staker address to retrieve
     * @return A structure with information about the requested staker
     */
    function getStaker(address staker) external view returns (Staker memory);

    /**
     * @notice Get the original staker address of the zombie at the given index
     * @param zombieNum Index of the zombie to lookup
     * @return Original staker address of the zombie
     */
    function zombieAddress(uint256 zombieNum) external view returns (address);

    /**
     * @notice Get Latest node that the given zombie at the given index is staked on
     * @param zombieNum Index of the zombie to lookup
     * @return Latest node that the given zombie is staked on
     */
    function zombieLatestStakedNode(uint256 zombieNum) external view returns (uint64);

    /// @return Current number of un-removed zombies
    function zombieCount() external view returns (uint256);

    function isZombie(address staker) external view returns (bool);

    /**
     * @notice Get the amount of funds withdrawable by the given address
     * @param owner Address to check the funds of
     * @return Amount of funds withdrawable by owner
     */
    function withdrawableFunds(address owner) external view returns (uint256);

    /**
     * @return Index of the first unresolved node
     * @dev If all nodes have been resolved, this will be latestNodeCreated + 1
     */
    function firstUnresolvedNode() external view returns (uint64);

    /// @return Index of the latest confirmed node
    function latestConfirmed() external view returns (uint64);

    /// @return Index of the latest rollup node created
    function latestNodeCreated() external view returns (uint64);

    /// @return Ethereum block that the most recent stake was created
    function lastStakeBlock() external view returns (uint64);

    /// @return Number of active stakers currently staked
    function stakerCount() external view returns (uint64);
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "../bridge/IBridge.sol";

interface IRollupEventInbox {
    function bridge() external view returns (IBridge);

    function initialize(IBridge _bridge) external;

    function rollup() external view returns (address);

    function updateRollupAddress() external;

    function rollupInitialized(uint256 chainId, string calldata chainConfig) external;
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "./IRollupCore.sol";
import "../bridge/ISequencerInbox.sol";
import "../bridge/IOutbox.sol";
import "../bridge/IOwnable.sol";

interface IRollupUserAbs is IRollupCore, IOwnable {
    /// @dev the user logic just validated configuration and shouldn't write to state during init
    /// this allows the admin logic to ensure consistency on parameters.
    function initialize(address stakeToken) external view;

    function removeWhitelistAfterFork() external;

    function removeWhitelistAfterValidatorAfk() external;

    function isERC20Enabled() external view returns (bool);

    function rejectNextNode(address stakerAddress) external;

    function confirmNextNode(bytes32 blockHash, bytes32 sendRoot) external;

    function stakeOnExistingNode(uint64 nodeNum, bytes32 nodeHash) external;

    function stakeOnNewNode(
        Assertion memory assertion,
        bytes32 expectedNodeHash,
        uint256 prevNodeInboxMaxCount
    ) external;

    function returnOldDeposit(address stakerAddress) external;

    function reduceDeposit(uint256 target) external;

    function removeZombie(uint256 zombieNum, uint256 maxNodes) external;

    function removeOldZombies(uint256 startIndex) external;

    function requiredStake(
        uint256 blockNumber,
        uint64 firstUnresolvedNodeNum,
        uint64 latestCreatedNode
    ) external view returns (uint256);

    function currentRequiredStake() external view returns (uint256);

    function countStakedZombies(uint64 nodeNum) external view returns (uint256);

    function countZombiesStakedOnChildren(uint64 nodeNum) external view returns (uint256);

    function requireUnresolvedExists() external view;

    function requireUnresolved(uint256 nodeNum) external view;

    function withdrawStakerFunds() external returns (uint256);

    function createChallenge(
        address[2] calldata stakers,
        uint64[2] calldata nodeNums,
        MachineStatus[2] calldata machineStatuses,
        GlobalState[2] calldata globalStates,
        uint64 numBlocks,
        bytes32 secondExecutionHash,
        uint256[2] calldata proposedTimes,
        bytes32[2] calldata wasmModuleRoots
    ) external;
}

interface IRollupUser is IRollupUserAbs {
    function newStakeOnExistingNode(uint64 nodeNum, bytes32 nodeHash) external payable;

    function newStakeOnNewNode(
        Assertion calldata assertion,
        bytes32 expectedNodeHash,
        uint256 prevNodeInboxMaxCount
    ) external payable;

    function addToDeposit(address stakerAddress) external payable;
}

interface IRollupUserERC20 is IRollupUserAbs {
    function newStakeOnExistingNode(
        uint256 tokenAmount,
        uint64 nodeNum,
        bytes32 nodeHash
    ) external;

    function newStakeOnNewNode(
        uint256 tokenAmount,
        Assertion calldata assertion,
        bytes32 expectedNodeHash,
        uint256 prevNodeInboxMaxCount
    ) external;

    function addToDeposit(address stakerAddress, uint256 tokenAmount) external;
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "../state/GlobalState.sol";
import "../state/Machine.sol";

struct ExecutionState {
    GlobalState globalState;
    MachineStatus machineStatus;
}

struct Assertion {
    ExecutionState beforeState;
    ExecutionState afterState;
    uint64 numBlocks;
}

struct Node {
    // Hash of the state of the chain as of this node
    bytes32 stateHash;
    // Hash of the data that can be challenged
    bytes32 challengeHash;
    // Hash of the data that will be committed if this node is confirmed
    bytes32 confirmData;
    // Index of the node previous to this one
    uint64 prevNum;
    // Deadline at which this node can be confirmed
    uint64 deadlineBlock;
    // Deadline at which a child of this node can be confirmed
    uint64 noChildConfirmedBeforeBlock;
    // Number of stakers staked on this node. This includes real stakers and zombies
    uint64 stakerCount;
    // Number of stakers staked on a child node. This includes real stakers and zombies
    uint64 childStakerCount;
    // This value starts at zero and is set to a value when the first child is created. After that it is constant until the node is destroyed or the owner destroys pending nodes
    uint64 firstChildBlock;
    // The number of the latest child of this node to be created
    uint64 latestChildNumber;
    // The block number when this node was created
    uint64 createdAtBlock;
    // A hash of all the data needed to determine this node's validity, to protect against reorgs
    bytes32 nodeHash;
}

/**
 * @notice Utility functions for Node
 */
library NodeLib {
    /**
     * @notice Initialize a Node
     * @param _stateHash Initial value of stateHash
     * @param _challengeHash Initial value of challengeHash
     * @param _confirmData Initial value of confirmData
     * @param _prevNum Initial value of prevNum
     * @param _deadlineBlock Initial value of deadlineBlock
     * @param _nodeHash Initial value of nodeHash
     */
    function createNode(
        bytes32 _stateHash,
        bytes32 _challengeHash,
        bytes32 _confirmData,
        uint64 _prevNum,
        uint64 _deadlineBlock,
        bytes32 _nodeHash
    ) internal view returns (Node memory) {
        Node memory node;
        node.stateHash = _stateHash;
        node.challengeHash = _challengeHash;
        node.confirmData = _confirmData;
        node.prevNum = _prevNum;
        node.deadlineBlock = _deadlineBlock;
        node.noChildConfirmedBeforeBlock = _deadlineBlock;
        node.createdAtBlock = uint64(block.number);
        node.nodeHash = _nodeHash;
        return node;
    }

    /**
     * @notice Update child properties
     * @param number The child number to set
     */
    function childCreated(Node storage self, uint64 number) internal {
        if (self.firstChildBlock == 0) {
            self.firstChildBlock = uint64(block.number);
        }
        self.latestChildNumber = number;
    }

    /**
     * @notice Update the child confirmed deadline
     * @param deadline The new deadline to set
     */
    function newChildConfirmDeadline(Node storage self, uint64 deadline) internal {
        self.noChildConfirmedBeforeBlock = deadline;
    }

    /**
     * @notice Check whether the current block number has met or passed the node's deadline
     */
    function requirePastDeadline(Node memory self) internal view {
        require(block.number >= self.deadlineBlock, "BEFORE_DEADLINE");
    }

    /**
     * @notice Check whether the current block number has met or passed deadline for children of this node to be confirmed
     */
    function requirePastChildConfirmDeadline(Node memory self) internal view {
        require(block.number >= self.noChildConfirmedBeforeBlock, "CHILD_TOO_RECENT");
    }
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

struct GlobalState {
    bytes32[2] bytes32Vals;
    uint64[2] u64Vals;
}

library GlobalStateLib {
    uint16 internal constant BYTES32_VALS_NUM = 2;
    uint16 internal constant U64_VALS_NUM = 2;

    function hash(GlobalState memory state) internal pure returns (bytes32) {
        return
            keccak256(
                abi.encodePacked(
                    "Global state:",
                    state.bytes32Vals[0],
                    state.bytes32Vals[1],
                    state.u64Vals[0],
                    state.u64Vals[1]
                )
            );
    }

    function getBlockHash(GlobalState memory state) internal pure returns (bytes32) {
        return state.bytes32Vals[0];
    }

    function getSendRoot(GlobalState memory state) internal pure returns (bytes32) {
        return state.bytes32Vals[1];
    }

    function getInboxPosition(GlobalState memory state) internal pure returns (uint64) {
        return state.u64Vals[0];
    }

    function getPositionInMessage(GlobalState memory state) internal pure returns (uint64) {
        return state.u64Vals[1];
    }

    function isEmpty(GlobalState calldata state) internal pure returns (bool) {
        return (state.bytes32Vals[0] == bytes32(0) &&
            state.bytes32Vals[1] == bytes32(0) &&
            state.u64Vals[0] == 0 &&
            state.u64Vals[1] == 0);
    }
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

struct Instruction {
    uint16 opcode;
    uint256 argumentData;
}

library Instructions {
    uint16 internal constant UNREACHABLE = 0x00;
    uint16 internal constant NOP = 0x01;
    uint16 internal constant RETURN = 0x0F;
    uint16 internal constant CALL = 0x10;
    uint16 internal constant CALL_INDIRECT = 0x11;
    uint16 internal constant LOCAL_GET = 0x20;
    uint16 internal constant LOCAL_SET = 0x21;
    uint16 internal constant GLOBAL_GET = 0x23;
    uint16 internal constant GLOBAL_SET = 0x24;

    uint16 internal constant I32_LOAD = 0x28;
    uint16 internal constant I64_LOAD = 0x29;
    uint16 internal constant F32_LOAD = 0x2A;
    uint16 internal constant F64_LOAD = 0x2B;
    uint16 internal constant I32_LOAD8_S = 0x2C;
    uint16 internal constant I32_LOAD8_U = 0x2D;
    uint16 internal constant I32_LOAD16_S = 0x2E;
    uint16 internal constant I32_LOAD16_U = 0x2F;
    uint16 internal constant I64_LOAD8_S = 0x30;
    uint16 internal constant I64_LOAD8_U = 0x31;
    uint16 internal constant I64_LOAD16_S = 0x32;
    uint16 internal constant I64_LOAD16_U = 0x33;
    uint16 internal constant I64_LOAD32_S = 0x34;
    uint16 internal constant I64_LOAD32_U = 0x35;

    uint16 internal constant I32_STORE = 0x36;
    uint16 internal constant I64_STORE = 0x37;
    uint16 internal constant F32_STORE = 0x38;
    uint16 internal constant F64_STORE = 0x39;
    uint16 internal constant I32_STORE8 = 0x3A;
    uint16 internal constant I32_STORE16 = 0x3B;
    uint16 internal constant I64_STORE8 = 0x3C;
    uint16 internal constant I64_STORE16 = 0x3D;
    uint16 internal constant I64_STORE32 = 0x3E;

    uint16 internal constant MEMORY_SIZE = 0x3F;
    uint16 internal constant MEMORY_GROW = 0x40;

    uint16 internal constant DROP = 0x1A;
    uint16 internal constant SELECT = 0x1B;
    uint16 internal constant I32_CONST = 0x41;
    uint16 internal constant I64_CONST = 0x42;
    uint16 internal constant F32_CONST = 0x43;
    uint16 internal constant F64_CONST = 0x44;
    uint16 internal constant I32_EQZ = 0x45;
    uint16 internal constant I32_RELOP_BASE = 0x46;
    uint16 internal constant IRELOP_EQ = 0;
    uint16 internal constant IRELOP_NE = 1;
    uint16 internal constant IRELOP_LT_S = 2;
    uint16 internal constant IRELOP_LT_U = 3;
    uint16 internal constant IRELOP_GT_S = 4;
    uint16 internal constant IRELOP_GT_U = 5;
    uint16 internal constant IRELOP_LE_S = 6;
    uint16 internal constant IRELOP_LE_U = 7;
    uint16 internal constant IRELOP_GE_S = 8;
    uint16 internal constant IRELOP_GE_U = 9;
    uint16 internal constant IRELOP_LAST = IRELOP_GE_U;

    uint16 internal constant I64_EQZ = 0x50;
    uint16 internal constant I64_RELOP_BASE = 0x51;

    uint16 internal constant I32_UNOP_BASE = 0x67;
    uint16 internal constant IUNOP_CLZ = 0;
    uint16 internal constant IUNOP_CTZ = 1;
    uint16 internal constant IUNOP_POPCNT = 2;
    uint16 internal constant IUNOP_LAST = IUNOP_POPCNT;

    uint16 internal constant I32_ADD = 0x6A;
    uint16 internal constant I32_SUB = 0x6B;
    uint16 internal constant I32_MUL = 0x6C;
    uint16 internal constant I32_DIV_S = 0x6D;
    uint16 internal constant I32_DIV_U = 0x6E;
    uint16 internal constant I32_REM_S = 0x6F;
    uint16 internal constant I32_REM_U = 0x70;
    uint16 internal constant I32_AND = 0x71;
    uint16 internal constant I32_OR = 0x72;
    uint16 internal constant I32_XOR = 0x73;
    uint16 internal constant I32_SHL = 0x74;
    uint16 internal constant I32_SHR_S = 0x75;
    uint16 internal constant I32_SHR_U = 0x76;
    uint16 internal constant I32_ROTL = 0x77;
    uint16 internal constant I32_ROTR = 0x78;

    uint16 internal constant I64_UNOP_BASE = 0x79;

    uint16 internal constant I64_ADD = 0x7C;
    uint16 internal constant I64_SUB = 0x7D;
    uint16 internal constant I64_MUL = 0x7E;
    uint16 internal constant I64_DIV_S = 0x7F;
    uint16 internal constant I64_DIV_U = 0x80;
    uint16 internal constant I64_REM_S = 0x81;
    uint16 internal constant I64_REM_U = 0x82;
    uint16 internal constant I64_AND = 0x83;
    uint16 internal constant I64_OR = 0x84;
    uint16 internal constant I64_XOR = 0x85;
    uint16 internal constant I64_SHL = 0x86;
    uint16 internal constant I64_SHR_S = 0x87;
    uint16 internal constant I64_SHR_U = 0x88;
    uint16 internal constant I64_ROTL = 0x89;
    uint16 internal constant I64_ROTR = 0x8A;

    uint16 internal constant I32_WRAP_I64 = 0xA7;
    uint16 internal constant I64_EXTEND_I32_S = 0xAC;
    uint16 internal constant I64_EXTEND_I32_U = 0xAD;

    uint16 internal constant I32_REINTERPRET_F32 = 0xBC;
    uint16 internal constant I64_REINTERPRET_F64 = 0xBD;
    uint16 internal constant F32_REINTERPRET_I32 = 0xBE;
    uint16 internal constant F64_REINTERPRET_I64 = 0xBF;

    uint16 internal constant I32_EXTEND_8S = 0xC0;
    uint16 internal constant I32_EXTEND_16S = 0xC1;
    uint16 internal constant I64_EXTEND_8S = 0xC2;
    uint16 internal constant I64_EXTEND_16S = 0xC3;
    uint16 internal constant I64_EXTEND_32S = 0xC4;

    uint16 internal constant INIT_FRAME = 0x8002;
    uint16 internal constant ARBITRARY_JUMP = 0x8003;
    uint16 internal constant ARBITRARY_JUMP_IF = 0x8004;
    uint16 internal constant MOVE_FROM_STACK_TO_INTERNAL = 0x8005;
    uint16 internal constant MOVE_FROM_INTERNAL_TO_STACK = 0x8006;
    uint16 internal constant DUP = 0x8008;
    uint16 internal constant CROSS_MODULE_CALL = 0x8009;
    uint16 internal constant CALLER_MODULE_INTERNAL_CALL = 0x800A;

    uint16 internal constant GET_GLOBAL_STATE_BYTES32 = 0x8010;
    uint16 internal constant SET_GLOBAL_STATE_BYTES32 = 0x8011;
    uint16 internal constant GET_GLOBAL_STATE_U64 = 0x8012;
    uint16 internal constant SET_GLOBAL_STATE_U64 = 0x8013;

    uint16 internal constant READ_PRE_IMAGE = 0x8020;
    uint16 internal constant READ_INBOX_MESSAGE = 0x8021;
    uint16 internal constant HALT_AND_SET_FINISHED = 0x8022;

    uint256 internal constant INBOX_INDEX_SEQUENCER = 0;
    uint256 internal constant INBOX_INDEX_DELAYED = 1;

    function hash(Instruction memory inst) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("Instruction:", inst.opcode, inst.argumentData));
    }
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "./ValueStack.sol";
import "./Instructions.sol";
import "./StackFrame.sol";

enum MachineStatus {
    RUNNING,
    FINISHED,
    ERRORED,
    TOO_FAR
}

struct Machine {
    MachineStatus status;
    ValueStack valueStack;
    ValueStack internalStack;
    StackFrameWindow frameStack;
    bytes32 globalStateHash;
    uint32 moduleIdx;
    uint32 functionIdx;
    uint32 functionPc;
    bytes32 modulesRoot;
}

library MachineLib {
    using StackFrameLib for StackFrameWindow;
    using ValueStackLib for ValueStack;

    function hash(Machine memory mach) internal pure returns (bytes32) {
        // Warning: the non-running hashes are replicated in Challenge
        if (mach.status == MachineStatus.RUNNING) {
            return
                keccak256(
                    abi.encodePacked(
                        "Machine running:",
                        mach.valueStack.hash(),
                        mach.internalStack.hash(),
                        mach.frameStack.hash(),
                        mach.globalStateHash,
                        mach.moduleIdx,
                        mach.functionIdx,
                        mach.functionPc,
                        mach.modulesRoot
                    )
                );
        } else if (mach.status == MachineStatus.FINISHED) {
            return keccak256(abi.encodePacked("Machine finished:", mach.globalStateHash));
        } else if (mach.status == MachineStatus.ERRORED) {
            return keccak256(abi.encodePacked("Machine errored:"));
        } else if (mach.status == MachineStatus.TOO_FAR) {
            return keccak256(abi.encodePacked("Machine too far:"));
        } else {
            revert("BAD_MACH_STATUS");
        }
    }
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "./ModuleMemoryCompact.sol";

struct Module {
    bytes32 globalsMerkleRoot;
    ModuleMemory moduleMemory;
    bytes32 tablesMerkleRoot;
    bytes32 functionsMerkleRoot;
    uint32 internalsOffset;
}

library ModuleLib {
    using ModuleMemoryCompactLib for ModuleMemory;

    function hash(Module memory mod) internal pure returns (bytes32) {
        return
            keccak256(
                abi.encodePacked(
                    "Module:",
                    mod.globalsMerkleRoot,
                    mod.moduleMemory.hash(),
                    mod.tablesMerkleRoot,
                    mod.functionsMerkleRoot,
                    mod.internalsOffset
                )
            );
    }
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

struct ModuleMemory {
    uint64 size;
    uint64 maxSize;
    bytes32 merkleRoot;
}

library ModuleMemoryCompactLib {
    function hash(ModuleMemory memory mem) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("Memory:", mem.size, mem.maxSize, mem.merkleRoot));
    }
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "./Value.sol";

struct StackFrame {
    Value returnPc;
    bytes32 localsMerkleRoot;
    uint32 callerModule;
    uint32 callerModuleInternals;
}

struct StackFrameWindow {
    StackFrame[] proved;
    bytes32 remainingHash;
}

library StackFrameLib {
    using ValueLib for Value;

    function hash(StackFrame memory frame) internal pure returns (bytes32) {
        return
            keccak256(
                abi.encodePacked(
                    "Stack frame:",
                    frame.returnPc.hash(),
                    frame.localsMerkleRoot,
                    frame.callerModule,
                    frame.callerModuleInternals
                )
            );
    }

    function hash(StackFrameWindow memory window) internal pure returns (bytes32 h) {
        h = window.remainingHash;
        for (uint256 i = 0; i < window.proved.length; i++) {
            h = keccak256(abi.encodePacked("Stack frame stack:", hash(window.proved[i]), h));
        }
    }

    function peek(StackFrameWindow memory window) internal pure returns (StackFrame memory) {
        require(window.proved.length == 1, "BAD_WINDOW_LENGTH");
        return window.proved[0];
    }

    function pop(StackFrameWindow memory window) internal pure returns (StackFrame memory frame) {
        require(window.proved.length == 1, "BAD_WINDOW_LENGTH");
        frame = window.proved[0];
        window.proved = new StackFrame[](0);
    }

    function push(StackFrameWindow memory window, StackFrame memory frame) internal pure {
        StackFrame[] memory newProved = new StackFrame[](window.proved.length + 1);
        for (uint256 i = 0; i < window.proved.length; i++) {
            newProved[i] = window.proved[i];
        }
        newProved[window.proved.length] = frame;
        window.proved = newProved;
    }
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

enum ValueType {
    I32,
    I64,
    F32,
    F64,
    REF_NULL,
    FUNC_REF,
    INTERNAL_REF
}

struct Value {
    ValueType valueType;
    uint256 contents;
}

library ValueLib {
    function hash(Value memory val) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("Value:", val.valueType, val.contents));
    }

    function maxValueType() internal pure returns (ValueType) {
        return ValueType.INTERNAL_REF;
    }

    function assumeI32(Value memory val) internal pure returns (uint32) {
        uint256 uintval = uint256(val.contents);
        require(val.valueType == ValueType.I32, "NOT_I32");
        require(uintval < (1 << 32), "BAD_I32");
        return uint32(uintval);
    }

    function assumeI64(Value memory val) internal pure returns (uint64) {
        uint256 uintval = uint256(val.contents);
        require(val.valueType == ValueType.I64, "NOT_I64");
        require(uintval < (1 << 64), "BAD_I64");
        return uint64(uintval);
    }

    function newRefNull() internal pure returns (Value memory) {
        return Value({valueType: ValueType.REF_NULL, contents: 0});
    }

    function newI32(uint32 x) internal pure returns (Value memory) {
        return Value({valueType: ValueType.I32, contents: uint256(x)});
    }

    function newI64(uint64 x) internal pure returns (Value memory) {
        return Value({valueType: ValueType.I64, contents: uint256(x)});
    }

    function newBoolean(bool x) internal pure returns (Value memory) {
        if (x) {
            return newI32(uint32(1));
        } else {
            return newI32(uint32(0));
        }
    }
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "./Value.sol";

struct ValueArray {
    Value[] inner;
}

library ValueArrayLib {
    function get(ValueArray memory arr, uint256 index) internal pure returns (Value memory) {
        return arr.inner[index];
    }

    function set(
        ValueArray memory arr,
        uint256 index,
        Value memory val
    ) internal pure {
        arr.inner[index] = val;
    }

    function length(ValueArray memory arr) internal pure returns (uint256) {
        return arr.inner.length;
    }

    function push(ValueArray memory arr, Value memory val) internal pure {
        Value[] memory newInner = new Value[](arr.inner.length + 1);
        for (uint256 i = 0; i < arr.inner.length; i++) {
            newInner[i] = arr.inner[i];
        }
        newInner[arr.inner.length] = val;
        arr.inner = newInner;
    }

    function pop(ValueArray memory arr) internal pure returns (Value memory popped) {
        popped = arr.inner[arr.inner.length - 1];
        Value[] memory newInner = new Value[](arr.inner.length - 1);
        for (uint256 i = 0; i < newInner.length; i++) {
            newInner[i] = arr.inner[i];
        }
        arr.inner = newInner;
    }
}

// Copyright 2021-2022, Offchain Labs, Inc.
// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

import "./Value.sol";
import "./ValueArray.sol";

struct ValueStack {
    ValueArray proved;
    bytes32 remainingHash;
}

library ValueStackLib {
    using ValueLib for Value;
    using ValueArrayLib for ValueArray;

    function hash(ValueStack memory stack) internal pure returns (bytes32 h) {
        h = stack.remainingHash;
        uint256 len = stack.proved.length();
        for (uint256 i = 0; i < len; i++) {
            h = keccak256(abi.encodePacked("Value stack:", stack.proved.get(i).hash(), h));
        }
    }

    function peek(ValueStack memory stack) internal pure returns (Value memory) {
        uint256 len = stack.proved.length();
        return stack.proved.get(len - 1);
    }

    function pop(ValueStack memory stack) internal pure returns (Value memory) {
        return stack.proved.pop();
    }

    function push(ValueStack memory stack, Value memory val) internal pure {
        return stack.proved.push(val);
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 100
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"previousAdmin","type":"address"},{"indexed":false,"internalType":"address","name":"newAdmin","type":"address"}],"name":"AdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"beacon","type":"address"}],"name":"BeaconUpgraded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"}],"name":"UpgradedSecondary","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[{"components":[{"internalType":"uint64","name":"confirmPeriodBlocks","type":"uint64"},{"internalType":"uint64","name":"extraChallengeTimeBlocks","type":"uint64"},{"internalType":"address","name":"stakeToken","type":"address"},{"internalType":"uint256","name":"baseStake","type":"uint256"},{"internalType":"bytes32","name":"wasmModuleRoot","type":"bytes32"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"loserStakeEscrow","type":"address"},{"internalType":"uint256","name":"chainId","type":"uint256"},{"internalType":"string","name":"chainConfig","type":"string"},{"internalType":"uint64","name":"genesisBlockNum","type":"uint64"},{"components":[{"internalType":"uint256","name":"delayBlocks","type":"uint256"},{"internalType":"uint256","name":"futureBlocks","type":"uint256"},{"internalType":"uint256","name":"delaySeconds","type":"uint256"},{"internalType":"uint256","name":"futureSeconds","type":"uint256"}],"internalType":"struct ISequencerInbox.MaxTimeVariation","name":"sequencerInboxMaxTimeVariation","type":"tuple"}],"internalType":"struct Config","name":"config","type":"tuple"},{"components":[{"internalType":"contract IBridge","name":"bridge","type":"address"},{"internalType":"contract ISequencerInbox","name":"sequencerInbox","type":"address"},{"internalType":"contract IInboxBase","name":"inbox","type":"address"},{"internalType":"contract IOutbox","name":"outbox","type":"address"},{"internalType":"contract IRollupEventInbox","name":"rollupEventInbox","type":"address"},{"internalType":"contract IChallengeManager","name":"challengeManager","type":"address"},{"internalType":"address","name":"rollupAdminLogic","type":"address"},{"internalType":"contract IRollupUser","name":"rollupUserLogic","type":"address"},{"internalType":"address","name":"validatorUtils","type":"address"},{"internalType":"address","name":"validatorWalletCreator","type":"address"}],"internalType":"struct ContractDependencies","name":"connectedContracts","type":"tuple"}],"name":"initializeProxy","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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