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// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { ILayerZeroUltraLightNodeV2 } from "@layerzerolabs/lz-evm-v1-0.7/contracts/interfaces/ILayerZeroUltraLightNodeV2.sol";

import { Worker } from "../../Worker.sol";
import { MultiSig } from "./MultiSig.sol";
import { ReadLib1002 } from "../readlib/ReadLib1002.sol";
import { IDVN } from "../interfaces/IDVN.sol";
import { IDVNFeeLib } from "../interfaces/IDVNFeeLib.sol";
import { IReceiveUlnE2 } from "../interfaces/IReceiveUlnE2.sol";

struct ExecuteParam {
    uint32 vid;
    address target;
    bytes callData;
    uint256 expiration;
    bytes signatures;
}

contract DVN is Worker, MultiSig, IDVN {
    // to uniquely identify this DVN instance
    // set to endpoint v1 eid if available OR endpoint v2 eid % 30_000
    uint32 public immutable vid;
    uint32 public immutable localEidV2; // endpoint-v2 only, for read call

    mapping(uint32 dstEid => DstConfig) public dstConfig;
    mapping(bytes32 executableHash => bool used) public usedHashes;

    error DVN_OnlySelf();
    error DVN_InvalidRole(bytes32 role);
    error DVN_InstructionExpired();
    error DVN_InvalidTarget(address target);
    error DVN_InvalidVid(uint32 vid);
    error DVN_InvalidSignatures();
    error DVN_DuplicatedHash(bytes32 executableHash);

    event VerifySignaturesFailed(uint256 idx);
    event ExecuteFailed(uint256 _index, bytes _data);
    event HashAlreadyUsed(ExecuteParam param, bytes32 _hash);
    // same as DVNFeePaid, but for ULNv2
    event VerifierFeePaid(uint256 fee);

    // ========================= Constructor =========================

    /// @dev DVN doesn't have a roleAdmin (address(0x0))
    /// @dev Supports all of ULNv2, ULN301, ULN302 and more
    /// @param _localEidV2 local endpoint-v2 eid
    /// @param _vid unique identifier for this DVN instance
    /// @param _messageLibs array of message lib addresses that are granted the MESSAGE_LIB_ROLE
    /// @param _priceFeed price feed address
    /// @param _signers array of signer addresses for multisig
    /// @param _quorum quorum for multisig
    /// @param _admins array of admin addresses that are granted the ADMIN_ROLE
    constructor(
        uint32 _localEidV2,
        uint32 _vid,
        address[] memory _messageLibs,
        address _priceFeed,
        address[] memory _signers,
        uint64 _quorum,
        address[] memory _admins
    ) Worker(_messageLibs, _priceFeed, 12000, address(0x0), _admins) MultiSig(_signers, _quorum) {
        vid = _vid;
        localEidV2 = _localEidV2;
    }

    // ========================= Modifier =========================

    /// @dev depending on role, restrict access to only self or admin
    /// @dev ALLOWLIST, DENYLIST, MESSAGE_LIB_ROLE can only be granted/revoked by self
    /// @dev ADMIN_ROLE can only be granted/revoked by admin
    /// @dev reverts if not one of the above roles
    /// @param _role role to check
    modifier onlySelfOrAdmin(bytes32 _role) {
        if (_role == ALLOWLIST || _role == DENYLIST || _role == MESSAGE_LIB_ROLE) {
            // self required
            if (address(this) != msg.sender) {
                revert DVN_OnlySelf();
            }
        } else if (_role == ADMIN_ROLE) {
            // admin required
            _checkRole(ADMIN_ROLE);
        } else {
            revert DVN_InvalidRole(_role);
        }
        _;
    }

    modifier onlySelf() {
        if (address(this) != msg.sender) {
            revert DVN_OnlySelf();
        }
        _;
    }

    // ========================= OnlySelf =========================

    /// @dev set signers for multisig
    /// @dev function sig 0x31cb6105
    /// @param _signer signer address
    /// @param _active true to add, false to remove
    function setSigner(address _signer, bool _active) external onlySelf {
        _setSigner(_signer, _active);
    }

    /// @dev set quorum for multisig
    /// @dev function sig 0x8585c945
    /// @param _quorum to set
    function setQuorum(uint64 _quorum) external onlySelf {
        _setQuorum(_quorum);
    }

    // ========================= OnlySelf / OnlyAdmin =========================

    /// @dev overrides AccessControl to allow self/admin to grant role'
    /// @dev function sig 0x2f2ff15d
    /// @param _role role to grant
    /// @param _account account to grant role to
    function grantRole(bytes32 _role, address _account) public override onlySelfOrAdmin(_role) {
        _grantRole(_role, _account);
    }

    /// @dev overrides AccessControl to allow self/admin to revoke role
    /// @dev function sig 0xd547741f
    /// @param _role role to revoke
    /// @param _account account to revoke role from
    function revokeRole(bytes32 _role, address _account) public override onlySelfOrAdmin(_role) {
        _revokeRole(_role, _account);
    }

    // ========================= OnlyQuorum =========================

    /// @notice function for quorum to change admin without going through execute function
    /// @dev calldata in the case is abi.encode new admin address
    function quorumChangeAdmin(ExecuteParam calldata _param) external {
        if (_param.expiration <= block.timestamp) {
            revert DVN_InstructionExpired();
        }
        if (_param.target != address(this)) {
            revert DVN_InvalidTarget(_param.target);
        }
        if (_param.vid != vid) {
            revert DVN_InvalidVid(_param.vid);
        }

        // generate and validate hash
        bytes32 hash = hashCallData(_param.vid, _param.target, _param.callData, _param.expiration);
        (bool sigsValid, ) = verifySignatures(hash, _param.signatures);
        if (!sigsValid) {
            revert DVN_InvalidSignatures();
        }
        if (usedHashes[hash]) {
            revert DVN_DuplicatedHash(hash);
        }

        usedHashes[hash] = true;
        _grantRole(ADMIN_ROLE, abi.decode(_param.callData, (address)));
    }

    // ========================= OnlyAdmin =========================

    /// @param _params array of DstConfigParam
    function setDstConfig(DstConfigParam[] calldata _params) external onlyRole(ADMIN_ROLE) {
        for (uint256 i = 0; i < _params.length; ++i) {
            DstConfigParam calldata param = _params[i];
            dstConfig[param.dstEid] = DstConfig(param.gas, param.multiplierBps, param.floorMarginUSD);
        }
        emit SetDstConfig(_params);
    }

    /// @dev takes a list of instructions and executes them in order
    /// @dev if any of the instructions fail, it will emit an error event and continue to execute the rest of the instructions
    /// @param _params array of ExecuteParam, includes target, callData, expiration, signatures
    function execute(ExecuteParam[] calldata _params) external onlyRole(ADMIN_ROLE) {
        for (uint256 i = 0; i < _params.length; ++i) {
            ExecuteParam calldata param = _params[i];
            // 1. skip if invalid vid
            if (param.vid != vid) {
                continue;
            }

            // 2. skip if expired
            if (param.expiration <= block.timestamp) {
                continue;
            }

            // generate and validate hash
            bytes32 hash = hashCallData(param.vid, param.target, param.callData, param.expiration);

            // 3. check signatures
            (bool sigsValid, ) = verifySignatures(hash, param.signatures);
            if (!sigsValid) {
                emit VerifySignaturesFailed(i);
                continue;
            }

            // 4. should check hash
            bool shouldCheckHash = _shouldCheckHash(bytes4(param.callData));
            if (shouldCheckHash) {
                if (usedHashes[hash]) {
                    emit HashAlreadyUsed(param, hash);
                    continue;
                } else {
                    usedHashes[hash] = true; // prevent reentry and replay attack
                }
            }

            (bool success, bytes memory rtnData) = param.target.call(param.callData);
            if (!success) {
                if (shouldCheckHash) {
                    // need to unset the usedHash otherwise it cant be used
                    usedHashes[hash] = false;
                }
                // emit an event in any case
                emit ExecuteFailed(i, rtnData);
            }
        }
    }

    /// @dev to support ULNv2
    /// @dev the withdrawFee function for ULN30X is built in the Worker contract
    /// @param _lib message lib address
    /// @param _to address to withdraw to
    /// @param _amount amount to withdraw
    function withdrawFeeFromUlnV2(address _lib, address payable _to, uint256 _amount) external onlyRole(ADMIN_ROLE) {
        if (!hasRole(MESSAGE_LIB_ROLE, _lib)) {
            revert Worker_OnlyMessageLib();
        }
        ILayerZeroUltraLightNodeV2(_lib).withdrawNative(_to, _amount);
    }

    // ========================= OnlyMessageLib =========================

    /// @dev for ULN301, ULN302 and more to assign job
    /// @dev dvn network can reject job from _sender by adding/removing them from allowlist/denylist
    /// @param _param assign job param
    /// @param _options dvn options
    function assignJob(
        AssignJobParam calldata _param,
        bytes calldata _options
    ) external payable onlyRole(MESSAGE_LIB_ROLE) onlyAcl(_param.sender) returns (uint256 totalFee) {
        IDVNFeeLib.FeeParams memory feeParams = IDVNFeeLib.FeeParams(
            priceFeed,
            _param.dstEid,
            _param.confirmations,
            _param.sender,
            quorum,
            defaultMultiplierBps
        );
        totalFee = IDVNFeeLib(workerFeeLib).getFeeOnSend(feeParams, dstConfig[_param.dstEid], _options);
    }

    /// @dev to support ULNv2
    /// @dev dvn network can reject job from _sender by adding/removing them from allowlist/denylist
    /// @param _dstEid destination EndpointId
    /// @param //_outboundProofType outbound proof type
    /// @param _confirmations block confirmations
    /// @param _sender message sender address
    function assignJob(
        uint16 _dstEid,
        uint16 /*_outboundProofType*/,
        uint64 _confirmations,
        address _sender
    ) external onlyRole(MESSAGE_LIB_ROLE) onlyAcl(_sender) returns (uint256 totalFee) {
        IDVNFeeLib.FeeParams memory params = IDVNFeeLib.FeeParams(
            priceFeed,
            _dstEid,
            _confirmations,
            _sender,
            quorum,
            defaultMultiplierBps
        );
        // ULNV2 does not have dvn options
        totalFee = IDVNFeeLib(workerFeeLib).getFeeOnSend(params, dstConfig[_dstEid], bytes(""));
        emit VerifierFeePaid(totalFee);
    }

    /// @dev to support ReadLib
    // @param _packetHeader - version + nonce + path
    // @param _cmd - the command to be executed to obtain the payload
    // @param _options - options
    function assignJob(
        address _sender,
        bytes calldata /*_packetHeader*/,
        bytes calldata _cmd,
        bytes calldata _options
    ) external payable onlyRole(MESSAGE_LIB_ROLE) onlyAcl(_sender) returns (uint256 fee) {
        IDVNFeeLib.FeeParamsForRead memory feeParams = IDVNFeeLib.FeeParamsForRead(
            priceFeed,
            _sender,
            quorum,
            defaultMultiplierBps
        );
        fee = IDVNFeeLib(workerFeeLib).getFeeOnSend(feeParams, dstConfig[localEidV2], _cmd, _options);
    }

    // ========================= View =========================

    /// @dev getFee can revert if _sender doesn't pass ACL
    /// @param _dstEid destination EndpointId
    /// @param _confirmations block confirmations
    /// @param _sender message sender address
    /// @param _options dvn options
    /// @return fee fee in native amount
    function getFee(
        uint32 _dstEid,
        uint64 _confirmations,
        address _sender,
        bytes calldata _options
    ) external view onlyAcl(_sender) returns (uint256 fee) {
        IDVNFeeLib.FeeParams memory params = IDVNFeeLib.FeeParams(
            priceFeed,
            _dstEid,
            _confirmations,
            _sender,
            quorum,
            defaultMultiplierBps
        );
        fee = IDVNFeeLib(workerFeeLib).getFee(params, dstConfig[_dstEid], _options);
    }

    /// @dev to support ULNv2
    /// @dev getFee can revert if _sender doesn't pass ACL
    /// @param _dstEid destination EndpointId
    /// @param //_outboundProofType outbound proof type
    /// @param _confirmations block confirmations
    /// @param _sender message sender address
    function getFee(
        uint16 _dstEid,
        uint16 /*_outboundProofType*/,
        uint64 _confirmations,
        address _sender
    ) public view onlyAcl(_sender) returns (uint256 fee) {
        IDVNFeeLib.FeeParams memory params = IDVNFeeLib.FeeParams(
            priceFeed,
            _dstEid,
            _confirmations,
            _sender,
            quorum,
            defaultMultiplierBps
        );
        fee = IDVNFeeLib(workerFeeLib).getFee(params, dstConfig[_dstEid], bytes(""));
    }

    /// @dev to support ReadLib
    // @param _packetHeader - version + nonce + path
    // @param _cmd - the command to be executed to obtain the payload
    // @param _options - options
    function getFee(
        address _sender,
        bytes calldata /*_packetHeader*/,
        bytes calldata _cmd,
        bytes calldata _options
    ) external view onlyAcl(_sender) returns (uint256 fee) {
        IDVNFeeLib.FeeParamsForRead memory feeParams = IDVNFeeLib.FeeParamsForRead(
            priceFeed,
            _sender,
            quorum,
            defaultMultiplierBps
        );
        fee = IDVNFeeLib(workerFeeLib).getFee(feeParams, dstConfig[localEidV2], _cmd, _options);
    }

    /// @param _target target address
    /// @param _callData call data
    /// @param _expiration expiration timestamp
    /// @return hash of above
    function hashCallData(
        uint32 _vid,
        address _target,
        bytes calldata _callData,
        uint256 _expiration
    ) public pure returns (bytes32) {
        return keccak256(abi.encodePacked(_vid, _target, _expiration, _callData));
    }

    // ========================= Internal =========================

    /// @dev to save gas, we don't check hash for some functions (where replaying won't change the state)
    /// @dev for example, some administrative functions like changing signers, the contract should check hash to double spending
    /// @dev should ensure that all onlySelf functions have unique functionSig
    /// @param _functionSig function signature
    /// @return true if should check hash
    function _shouldCheckHash(bytes4 _functionSig) internal pure returns (bool) {
        // never check for these selectors to save gas
        return
            _functionSig != IReceiveUlnE2.verify.selector && // 0x0223536e, replaying won't change the state
            _functionSig != ReadLib1002.verify.selector && // 0xab750e75, replaying won't change the state
            _functionSig != ILayerZeroUltraLightNodeV2.updateHash.selector; // 0x704316e5, replaying will be revert at uln
    }
}

// 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/nitro/blob/master/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 "./IInboxBase.sol";

interface IInbox is IInboxBase {
    function sendL1FundedUnsignedTransaction(
        uint256 gasLimit,
        uint256 maxFeePerGas,
        uint256 nonce,
        address to,
        bytes calldata data
    ) external payable returns (uint256);

    function sendL1FundedContractTransaction(
        uint256 gasLimit,
        uint256 maxFeePerGas,
        address to,
        bytes calldata data
    ) external payable returns (uint256);

    /**
     * @dev This method can only be called upon L1 fork and will not alias the caller
     *      This method will revert if not called from origin
     */
    function sendL1FundedUnsignedTransactionToFork(
        uint256 gasLimit,
        uint256 maxFeePerGas,
        uint256 nonce,
        address to,
        bytes calldata data
    ) external payable returns (uint256);

    /**
     * @dev This method can only be called upon L1 fork and will not alias the caller
     *      This method will revert if not called from origin
     */
    function sendUnsignedTransactionToFork(
        uint256 gasLimit,
        uint256 maxFeePerGas,
        uint256 nonce,
        address to,
        uint256 value,
        bytes calldata data
    ) external returns (uint256);

    /**
     * @notice Send a message to initiate L2 withdrawal
     * @dev This method can only be called upon L1 fork and will not alias the caller
     *      This method will revert if not called from origin
     */
    function sendWithdrawEthToFork(
        uint256 gasLimit,
        uint256 maxFeePerGas,
        uint256 nonce,
        uint256 value,
        address withdrawTo
    ) external returns (uint256);

    /**
     * @notice Deposit eth from L1 to L2 to address of the sender if sender is an EOA, and to its aliased address if the sender is a contract
     * @dev This does not trigger the fallback function when receiving in the L2 side.
     *      Look into retryable tickets if you are interested in this functionality.
     * @dev This function should not be called inside contract constructors
     */
    function depositEth() external payable returns (uint256);

    /**
     * @notice Put a message in the L2 inbox that can be reexecuted for some fixed amount of time if it reverts
     * @dev all msg.value will deposited to callValueRefundAddress on L2
     * @dev Gas limit and maxFeePerGas should not be set to 1 as that is used to trigger the RetryableData error
     * @param to destination L2 contract address
     * @param l2CallValue call value for retryable L2 message
     * @param maxSubmissionCost Max gas deducted from user's L2 balance to cover base submission fee
     * @param excessFeeRefundAddress gasLimit x maxFeePerGas - execution cost gets credited here on L2 balance
     * @param callValueRefundAddress l2Callvalue gets credited here on L2 if retryable txn times out or gets cancelled
     * @param gasLimit Max gas deducted from user's L2 balance to cover L2 execution. Should not be set to 1 (magic value used to trigger the RetryableData error)
     * @param maxFeePerGas price bid for L2 execution. Should not be set to 1 (magic value used to trigger the RetryableData error)
     * @param data ABI encoded data of L2 message
     * @return unique message number of the retryable transaction
     */
    function createRetryableTicket(
        address to,
        uint256 l2CallValue,
        uint256 maxSubmissionCost,
        address excessFeeRefundAddress,
        address callValueRefundAddress,
        uint256 gasLimit,
        uint256 maxFeePerGas,
        bytes calldata data
    ) external payable returns (uint256);

    /**
     * @notice Put a message in the L2 inbox that can be reexecuted for some fixed amount of time if it reverts
     * @dev Same as createRetryableTicket, but does not guarantee that submission will succeed by requiring the needed funds
     * come from the deposit alone, rather than falling back on the user's L2 balance
     * @dev Advanced usage only (does not rewrite aliases for excessFeeRefundAddress and callValueRefundAddress).
     * createRetryableTicket method is the recommended standard.
     * @dev Gas limit and maxFeePerGas should not be set to 1 as that is used to trigger the RetryableData error
     * @param to destination L2 contract address
     * @param l2CallValue call value for retryable L2 message
     * @param maxSubmissionCost Max gas deducted from user's L2 balance to cover base submission fee
     * @param excessFeeRefundAddress gasLimit x maxFeePerGas - execution cost gets credited here on L2 balance
     * @param callValueRefundAddress l2Callvalue gets credited here on L2 if retryable txn times out or gets cancelled
     * @param gasLimit Max gas deducted from user's L2 balance to cover L2 execution. Should not be set to 1 (magic value used to trigger the RetryableData error)
     * @param maxFeePerGas price bid for L2 execution. Should not be set to 1 (magic value used to trigger the RetryableData error)
     * @param data ABI encoded data of L2 message
     * @return unique message number of the retryable transaction
     */
    function unsafeCreateRetryableTicket(
        address to,
        uint256 l2CallValue,
        uint256 maxSubmissionCost,
        address excessFeeRefundAddress,
        address callValueRefundAddress,
        uint256 gasLimit,
        uint256 maxFeePerGas,
        bytes calldata data
    ) external payable returns (uint256);

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

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

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 >=0.4.21 <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;

library AddressAliasHelper {
    uint160 internal constant OFFSET = uint160(0x1111000000000000000000000000000000001111);

    /// @notice Utility function that converts the address in the L1 that submitted a tx to
    /// the inbox to the msg.sender viewed in the L2
    /// @param l1Address the address in the L1 that triggered the tx to L2
    /// @return l2Address L2 address as viewed in msg.sender
    function applyL1ToL2Alias(address l1Address) internal pure returns (address l2Address) {
        unchecked {
            l2Address = address(uint160(l1Address) + OFFSET);
        }
    }

    /// @notice Utility function that converts the msg.sender viewed in the L2 to the
    /// address in the L1 that submitted a tx to the inbox
    /// @param l2Address L2 address as viewed in msg.sender
    /// @return l1Address the address in the L1 that triggered the tx to L2
    function undoL1ToL2Alias(address l2Address) internal pure returns (address l1Address) {
        unchecked {
            l1Address = address(uint160(l2Address) - OFFSET);
        }
    }
}

// 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);
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IAxelarGateway } from '../interfaces/IAxelarGateway.sol';
import { IAxelarExecutable } from '../interfaces/IAxelarExecutable.sol';

contract AxelarExecutable is IAxelarExecutable {
    IAxelarGateway public immutable gateway;

    constructor(address gateway_) {
        if (gateway_ == address(0)) revert InvalidAddress();

        gateway = IAxelarGateway(gateway_);
    }

    function execute(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload
    ) external {
        bytes32 payloadHash = keccak256(payload);

        if (!gateway.validateContractCall(commandId, sourceChain, sourceAddress, payloadHash))
            revert NotApprovedByGateway();

        _execute(sourceChain, sourceAddress, payload);
    }

    function executeWithToken(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata tokenSymbol,
        uint256 amount
    ) external {
        bytes32 payloadHash = keccak256(payload);

        if (
            !gateway.validateContractCallAndMint(
                commandId,
                sourceChain,
                sourceAddress,
                payloadHash,
                tokenSymbol,
                amount
            )
        ) revert NotApprovedByGateway();

        _executeWithToken(sourceChain, sourceAddress, payload, tokenSymbol, amount);
    }

    function _execute(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload
    ) internal virtual {}

    function _executeWithToken(
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata tokenSymbol,
        uint256 amount
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IAxelarGateway } from './IAxelarGateway.sol';

interface IAxelarExecutable {
    error InvalidAddress();
    error NotApprovedByGateway();

    function gateway() external view returns (IAxelarGateway);

    function execute(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload
    ) external;

    function executeWithToken(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes calldata payload,
        string calldata tokenSymbol,
        uint256 amount
    ) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IUpgradable } from '../interfaces/IUpgradable.sol';

/**
 * @title IAxelarGasService Interface
 * @notice This is an interface for the AxelarGasService contract which manages gas payments
 * and refunds for cross-chain communication on the Axelar network.
 * @dev This interface inherits IUpgradable
 */
interface IAxelarGasService is IUpgradable {
    error NothingReceived();
    error InvalidAddress();
    error NotCollector();
    error InvalidAmounts();

    event GasPaidForContractCall(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event GasPaidForContractCallWithToken(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        string symbol,
        uint256 amount,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event NativeGasPaidForContractCall(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event NativeGasPaidForContractCallWithToken(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        string symbol,
        uint256 amount,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event GasPaidForExpressCall(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event GasPaidForExpressCallWithToken(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        string symbol,
        uint256 amount,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event NativeGasPaidForExpressCall(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event NativeGasPaidForExpressCallWithToken(
        address indexed sourceAddress,
        string destinationChain,
        string destinationAddress,
        bytes32 indexed payloadHash,
        string symbol,
        uint256 amount,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event GasAdded(
        bytes32 indexed txHash,
        uint256 indexed logIndex,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event NativeGasAdded(bytes32 indexed txHash, uint256 indexed logIndex, uint256 gasFeeAmount, address refundAddress);

    event ExpressGasAdded(
        bytes32 indexed txHash,
        uint256 indexed logIndex,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event NativeExpressGasAdded(
        bytes32 indexed txHash,
        uint256 indexed logIndex,
        uint256 gasFeeAmount,
        address refundAddress
    );

    event Refunded(
        bytes32 indexed txHash,
        uint256 indexed logIndex,
        address payable receiver,
        address token,
        uint256 amount
    );

    /**
     * @notice Pay for gas using ERC20 tokens for a contract call on a destination chain.
     * @dev This function is called on the source chain before calling the gateway to execute a remote contract.
     * @param sender The address making the payment
     * @param destinationChain The target chain where the contract call will be made
     * @param destinationAddress The target address on the destination chain
     * @param payload Data payload for the contract call
     * @param gasToken The address of the ERC20 token used to pay for gas
     * @param gasFeeAmount The amount of tokens to pay for gas
     * @param refundAddress The address where refunds, if any, should be sent
     */
    function payGasForContractCall(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    ) external;

    /**
     * @notice Pay for gas using ERC20 tokens for a contract call with tokens on a destination chain.
     * @dev This function is called on the source chain before calling the gateway to execute a remote contract.
     * @param sender The address making the payment
     * @param destinationChain The target chain where the contract call with tokens will be made
     * @param destinationAddress The target address on the destination chain
     * @param payload Data payload for the contract call with tokens
     * @param symbol The symbol of the token to be sent with the call
     * @param amount The amount of tokens to be sent with the call
     * @param gasToken The address of the ERC20 token used to pay for gas
     * @param gasFeeAmount The amount of tokens to pay for gas
     * @param refundAddress The address where refunds, if any, should be sent
     */
    function payGasForContractCallWithToken(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    ) external;

    /**
     * @notice Pay for gas using native currency for a contract call on a destination chain.
     * @dev This function is called on the source chain before calling the gateway to execute a remote contract.
     * @param sender The address making the payment
     * @param destinationChain The target chain where the contract call will be made
     * @param destinationAddress The target address on the destination chain
     * @param payload Data payload for the contract call
     * @param refundAddress The address where refunds, if any, should be sent
     */
    function payNativeGasForContractCall(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        address refundAddress
    ) external payable;

    /**
     * @notice Pay for gas using native currency for a contract call with tokens on a destination chain.
     * @dev This function is called on the source chain before calling the gateway to execute a remote contract.
     * @param sender The address making the payment
     * @param destinationChain The target chain where the contract call with tokens will be made
     * @param destinationAddress The target address on the destination chain
     * @param payload Data payload for the contract call with tokens
     * @param symbol The symbol of the token to be sent with the call
     * @param amount The amount of tokens to be sent with the call
     * @param refundAddress The address where refunds, if any, should be sent
     */
    function payNativeGasForContractCallWithToken(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount,
        address refundAddress
    ) external payable;

    /**
     * @notice Pay for gas using ERC20 tokens for an express contract call on a destination chain.
     * @dev This function is called on the source chain before calling the gateway to express execute a remote contract.
     * @param sender The address making the payment
     * @param destinationChain The target chain where the contract call will be made
     * @param destinationAddress The target address on the destination chain
     * @param payload Data payload for the contract call
     * @param gasToken The address of the ERC20 token used to pay for gas
     * @param gasFeeAmount The amount of tokens to pay for gas
     * @param refundAddress The address where refunds, if any, should be sent
     */
    function payGasForExpressCall(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    ) external;

    /**
     * @notice Pay for gas using ERC20 tokens for an express contract call with tokens on a destination chain.
     * @dev This function is called on the source chain before calling the gateway to express execute a remote contract.
     * @param sender The address making the payment
     * @param destinationChain The target chain where the contract call with tokens will be made
     * @param destinationAddress The target address on the destination chain
     * @param payload Data payload for the contract call with tokens
     * @param symbol The symbol of the token to be sent with the call
     * @param amount The amount of tokens to be sent with the call
     * @param gasToken The address of the ERC20 token used to pay for gas
     * @param gasFeeAmount The amount of tokens to pay for gas
     * @param refundAddress The address where refunds, if any, should be sent
     */
    function payGasForExpressCallWithToken(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    ) external;

    /**
     * @notice Pay for gas using native currency for an express contract call on a destination chain.
     * @dev This function is called on the source chain before calling the gateway to express execute a remote contract.
     * @param sender The address making the payment
     * @param destinationChain The target chain where the contract call will be made
     * @param destinationAddress The target address on the destination chain
     * @param payload Data payload for the contract call
     * @param refundAddress The address where refunds, if any, should be sent
     */
    function payNativeGasForExpressCall(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        address refundAddress
    ) external payable;

    /**
     * @notice Pay for gas using native currency for an express contract call with tokens on a destination chain.
     * @dev This function is called on the source chain before calling the gateway to express execute a remote contract.
     * @param sender The address making the payment
     * @param destinationChain The target chain where the contract call with tokens will be made
     * @param destinationAddress The target address on the destination chain
     * @param payload Data payload for the contract call with tokens
     * @param symbol The symbol of the token to be sent with the call
     * @param amount The amount of tokens to be sent with the call
     * @param refundAddress The address where refunds, if any, should be sent
     */
    function payNativeGasForExpressCallWithToken(
        address sender,
        string calldata destinationChain,
        string calldata destinationAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount,
        address refundAddress
    ) external payable;

    /**
     * @notice Add additional gas payment using ERC20 tokens after initiating a cross-chain call.
     * @dev This function can be called on the source chain after calling the gateway to execute a remote contract.
     * @param txHash The transaction hash of the cross-chain call
     * @param logIndex The log index for the cross-chain call
     * @param gasToken The ERC20 token address used to add gas
     * @param gasFeeAmount The amount of tokens to add as gas
     * @param refundAddress The address where refunds, if any, should be sent
     */
    function addGas(
        bytes32 txHash,
        uint256 logIndex,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    ) external;

    /**
     * @notice Add additional gas payment using native currency after initiating a cross-chain call.
     * @dev This function can be called on the source chain after calling the gateway to execute a remote contract.
     * @param txHash The transaction hash of the cross-chain call
     * @param logIndex The log index for the cross-chain call
     * @param refundAddress The address where refunds, if any, should be sent
     */
    function addNativeGas(
        bytes32 txHash,
        uint256 logIndex,
        address refundAddress
    ) external payable;

    /**
     * @notice Add additional gas payment using ERC20 tokens after initiating an express cross-chain call.
     * @dev This function can be called on the source chain after calling the gateway to express execute a remote contract.
     * @param txHash The transaction hash of the cross-chain call
     * @param logIndex The log index for the cross-chain call
     * @param gasToken The ERC20 token address used to add gas
     * @param gasFeeAmount The amount of tokens to add as gas
     * @param refundAddress The address where refunds, if any, should be sent
     */
    function addExpressGas(
        bytes32 txHash,
        uint256 logIndex,
        address gasToken,
        uint256 gasFeeAmount,
        address refundAddress
    ) external;

    /**
     * @notice Add additional gas payment using native currency after initiating an express cross-chain call.
     * @dev This function can be called on the source chain after calling the gateway to express execute a remote contract.
     * @param txHash The transaction hash of the cross-chain call
     * @param logIndex The log index for the cross-chain call
     * @param refundAddress The address where refunds, if any, should be sent
     */
    function addNativeExpressGas(
        bytes32 txHash,
        uint256 logIndex,
        address refundAddress
    ) external payable;

    /**
     * @notice Allows the gasCollector to collect accumulated fees from the contract.
     * @dev Use address(0) as the token address for native currency.
     * @param receiver The address to receive the collected fees
     * @param tokens Array of token addresses to be collected
     * @param amounts Array of amounts to be collected for each respective token address
     */
    function collectFees(
        address payable receiver,
        address[] calldata tokens,
        uint256[] calldata amounts
    ) external;

    /**
     * @notice Refunds gas payment to the receiver in relation to a specific cross-chain transaction.
     * @dev Only callable by the gasCollector.
     * @dev Use address(0) as the token address to refund native currency.
     * @param txHash The transaction hash of the cross-chain call
     * @param logIndex The log index for the cross-chain call
     * @param receiver The address to receive the refund
     * @param token The token address to be refunded
     * @param amount The amount to refund
     */
    function refund(
        bytes32 txHash,
        uint256 logIndex,
        address payable receiver,
        address token,
        uint256 amount
    ) external;

    /**
     * @notice Returns the address of the designated gas collector.
     * @return address of the gas collector
     */
    function gasCollector() external returns (address);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IGovernable } from './IGovernable.sol';
import { IImplementation } from './IImplementation.sol';

interface IAxelarGateway is IImplementation, IGovernable {
    /**********\
    |* Errors *|
    \**********/

    error NotSelf();
    error InvalidCodeHash();
    error SetupFailed();
    error InvalidAuthModule();
    error InvalidTokenDeployer();
    error InvalidAmount();
    error InvalidChainId();
    error InvalidCommands();
    error TokenDoesNotExist(string symbol);
    error TokenAlreadyExists(string symbol);
    error TokenDeployFailed(string symbol);
    error TokenContractDoesNotExist(address token);
    error BurnFailed(string symbol);
    error MintFailed(string symbol);
    error InvalidSetMintLimitsParams();
    error ExceedMintLimit(string symbol);

    /**********\
    |* Events *|
    \**********/

    event TokenSent(
        address indexed sender,
        string destinationChain,
        string destinationAddress,
        string symbol,
        uint256 amount
    );

    event ContractCall(
        address indexed sender,
        string destinationChain,
        string destinationContractAddress,
        bytes32 indexed payloadHash,
        bytes payload
    );

    event ContractCallWithToken(
        address indexed sender,
        string destinationChain,
        string destinationContractAddress,
        bytes32 indexed payloadHash,
        bytes payload,
        string symbol,
        uint256 amount
    );

    event Executed(bytes32 indexed commandId);

    event TokenDeployed(string symbol, address tokenAddresses);

    event ContractCallApproved(
        bytes32 indexed commandId,
        string sourceChain,
        string sourceAddress,
        address indexed contractAddress,
        bytes32 indexed payloadHash,
        bytes32 sourceTxHash,
        uint256 sourceEventIndex
    );

    event ContractCallApprovedWithMint(
        bytes32 indexed commandId,
        string sourceChain,
        string sourceAddress,
        address indexed contractAddress,
        bytes32 indexed payloadHash,
        string symbol,
        uint256 amount,
        bytes32 sourceTxHash,
        uint256 sourceEventIndex
    );

    event ContractCallExecuted(bytes32 indexed commandId);

    event TokenMintLimitUpdated(string symbol, uint256 limit);

    event OperatorshipTransferred(bytes newOperatorsData);

    event Upgraded(address indexed implementation);

    /********************\
    |* Public Functions *|
    \********************/

    function sendToken(
        string calldata destinationChain,
        string calldata destinationAddress,
        string calldata symbol,
        uint256 amount
    ) external;

    function callContract(
        string calldata destinationChain,
        string calldata contractAddress,
        bytes calldata payload
    ) external;

    function callContractWithToken(
        string calldata destinationChain,
        string calldata contractAddress,
        bytes calldata payload,
        string calldata symbol,
        uint256 amount
    ) external;

    function isContractCallApproved(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        address contractAddress,
        bytes32 payloadHash
    ) external view returns (bool);

    function isContractCallAndMintApproved(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        address contractAddress,
        bytes32 payloadHash,
        string calldata symbol,
        uint256 amount
    ) external view returns (bool);

    function validateContractCall(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes32 payloadHash
    ) external returns (bool);

    function validateContractCallAndMint(
        bytes32 commandId,
        string calldata sourceChain,
        string calldata sourceAddress,
        bytes32 payloadHash,
        string calldata symbol,
        uint256 amount
    ) external returns (bool);

    /***********\
    |* Getters *|
    \***********/

    function authModule() external view returns (address);

    function tokenDeployer() external view returns (address);

    function tokenMintLimit(string memory symbol) external view returns (uint256);

    function tokenMintAmount(string memory symbol) external view returns (uint256);

    function allTokensFrozen() external view returns (bool);

    function implementation() external view returns (address);

    function tokenAddresses(string memory symbol) external view returns (address);

    function tokenFrozen(string memory symbol) external view returns (bool);

    function isCommandExecuted(bytes32 commandId) external view returns (bool);

    /************************\
    |* Governance Functions *|
    \************************/

    function setTokenMintLimits(string[] calldata symbols, uint256[] calldata limits) external;

    function upgrade(
        address newImplementation,
        bytes32 newImplementationCodeHash,
        bytes calldata setupParams
    ) external;

    /**********************\
    |* External Functions *|
    \**********************/

    function execute(bytes calldata input) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

// General interface for upgradable contracts
interface IContractIdentifier {
    /**
     * @notice Returns the contract ID. It can be used as a check during upgrades.
     * @dev Meant to be overridden in derived contracts.
     * @return bytes32 The contract ID
     */
    function contractId() external pure returns (bytes32);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title IGovernable Interface
 * @notice This is an interface used by the AxelarGateway contract to manage governance and mint limiter roles.
 */
interface IGovernable {
    error NotGovernance();
    error NotMintLimiter();
    error InvalidGovernance();
    error InvalidMintLimiter();

    event GovernanceTransferred(address indexed previousGovernance, address indexed newGovernance);
    event MintLimiterTransferred(address indexed previousGovernance, address indexed newGovernance);

    /**
     * @notice Returns the governance address.
     * @return address of the governance
     */
    function governance() external view returns (address);

    /**
     * @notice Returns the mint limiter address.
     * @return address of the mint limiter
     */
    function mintLimiter() external view returns (address);

    /**
     * @notice Transfer the governance role to another address.
     * @param newGovernance The new governance address
     */
    function transferGovernance(address newGovernance) external;

    /**
     * @notice Transfer the mint limiter role to another address.
     * @param newGovernance The new mint limiter address
     */
    function transferMintLimiter(address newGovernance) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IContractIdentifier } from './IContractIdentifier.sol';

interface IImplementation is IContractIdentifier {
    error NotProxy();

    function setup(bytes calldata data) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title IOwnable Interface
 * @notice IOwnable is an interface that abstracts the implementation of a
 * contract with ownership control features. It's commonly used in upgradable
 * contracts and includes the functionality to get current owner, transfer
 * ownership, and propose and accept ownership.
 */
interface IOwnable {
    error NotOwner();
    error InvalidOwner();
    error InvalidOwnerAddress();

    event OwnershipTransferStarted(address indexed newOwner);
    event OwnershipTransferred(address indexed newOwner);

    /**
     * @notice Returns the current owner of the contract.
     * @return address The address of the current owner
     */
    function owner() external view returns (address);

    /**
     * @notice Returns the address of the pending owner of the contract.
     * @return address The address of the pending owner
     */
    function pendingOwner() external view returns (address);

    /**
     * @notice Transfers ownership of the contract to a new address
     * @param newOwner The address to transfer ownership to
     */
    function transferOwnership(address newOwner) external;

    /**
     * @notice Proposes to transfer the contract's ownership to a new address.
     * The new owner needs to accept the ownership explicitly.
     * @param newOwner The address to transfer ownership to
     */
    function proposeOwnership(address newOwner) external;

    /**
     * @notice Transfers ownership to the pending owner.
     * @dev Can only be called by the pending owner
     */
    function acceptOwnership() external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { IOwnable } from './IOwnable.sol';
import { IImplementation } from './IImplementation.sol';

// General interface for upgradable contracts
interface IUpgradable is IOwnable, IImplementation {
    error InvalidCodeHash();
    error InvalidImplementation();
    error SetupFailed();

    event Upgraded(address indexed newImplementation);

    function implementation() external view returns (address);

    function upgrade(
        address newImplementation,
        bytes32 newImplementationCodeHash,
        bytes calldata params
    ) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {Client} from "../libraries/Client.sol";

/// @notice Application contracts that intend to receive messages from
/// the router should implement this interface.
interface IAny2EVMMessageReceiver {
  /// @notice Called by the Router to deliver a message.
  /// If this reverts, any token transfers also revert. The message
  /// will move to a FAILED state and become available for manual execution.
  /// @param message CCIP Message
  /// @dev Note ensure you check the msg.sender is the OffRampRouter
  function ccipReceive(Client.Any2EVMMessage calldata message) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {Client} from "../libraries/Client.sol";

interface IRouterClient {
  error UnsupportedDestinationChain(uint64 destChainSelector);
  error InsufficientFeeTokenAmount();
  error InvalidMsgValue();

  /// @notice Checks if the given chain ID is supported for sending/receiving.
  /// @param chainSelector The chain to check.
  /// @return supported is true if it is supported, false if not.
  function isChainSupported(uint64 chainSelector) external view returns (bool supported);

  /// @notice Gets a list of all supported tokens which can be sent or received
  /// to/from a given chain id.
  /// @param chainSelector The chainSelector.
  /// @return tokens The addresses of all tokens that are supported.
  function getSupportedTokens(uint64 chainSelector) external view returns (address[] memory tokens);

  /// @param destinationChainSelector The destination chainSelector
  /// @param message The cross-chain CCIP message including data and/or tokens
  /// @return fee returns guaranteed execution fee for the specified message
  /// delivery to destination chain
  /// @dev returns 0 fee on invalid message.
  function getFee(
    uint64 destinationChainSelector,
    Client.EVM2AnyMessage memory message
  ) external view returns (uint256 fee);

  /// @notice Request a message to be sent to the destination chain
  /// @param destinationChainSelector The destination chain ID
  /// @param message The cross-chain CCIP message including data and/or tokens
  /// @return messageId The message ID
  /// @dev Note if msg.value is larger than the required fee (from getFee) we accept
  /// the overpayment with no refund.
  function ccipSend(
    uint64 destinationChainSelector,
    Client.EVM2AnyMessage calldata message
  ) external payable returns (bytes32);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// End consumer library.
library Client {
  struct EVMTokenAmount {
    address token; // token address on the local chain.
    uint256 amount; // Amount of tokens.
  }

  struct Any2EVMMessage {
    bytes32 messageId; // MessageId corresponding to ccipSend on source.
    uint64 sourceChainSelector; // Source chain selector.
    bytes sender; // abi.decode(sender) if coming from an EVM chain.
    bytes data; // payload sent in original message.
    EVMTokenAmount[] destTokenAmounts; // Tokens and their amounts in their destination chain representation.
  }

  // If extraArgs is empty bytes, the default is 200k gas limit and strict = false.
  struct EVM2AnyMessage {
    bytes receiver; // abi.encode(receiver address) for dest EVM chains
    bytes data; // Data payload
    EVMTokenAmount[] tokenAmounts; // Token transfers
    address feeToken; // Address of feeToken. address(0) means you will send msg.value.
    bytes extraArgs; // Populate this with _argsToBytes(EVMExtraArgsV1)
  }

  // extraArgs will evolve to support new features
  // bytes4(keccak256("CCIP EVMExtraArgsV1"));
  bytes4 public constant EVM_EXTRA_ARGS_V1_TAG = 0x97a657c9;
  struct EVMExtraArgsV1 {
    uint256 gasLimit; // ATTENTION!!! MAX GAS LIMIT 4M FOR BETA TESTING
    bool strict; // See strict sequencing details below.
  }

  function _argsToBytes(EVMExtraArgsV1 memory extraArgs) internal pure returns (bytes memory bts) {
    return abi.encodeWithSelector(EVM_EXTRA_ARGS_V1_TAG, extraArgs);
  }
}

// SPDX-License-Identifier: MIT
pragma solidity >0.5.0 <0.9.0;

/**
 * @title ICrossDomainMessenger
 */
interface ICrossDomainMessenger {
    /**********
     * Events *
     **********/

    event SentMessage(
        address indexed target,
        address sender,
        bytes message,
        uint256 messageNonce,
        uint256 gasLimit
    );
    event RelayedMessage(bytes32 indexed msgHash);
    event FailedRelayedMessage(bytes32 indexed msgHash);

    /*************
     * Variables *
     *************/

    function xDomainMessageSender() external view returns (address);

    /********************
     * Public Functions *
     ********************/

    /**
     * Sends a cross domain message to the target messenger.
     * @param _target Target contract address.
     * @param _message Message to send to the target.
     * @param _gasLimit Gas limit for the provided message.
     */
    function sendMessage(
        address _target,
        bytes calldata _message,
        uint32 _gasLimit
    ) external;
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

import { IMessageLibManager } from "./IMessageLibManager.sol";
import { IMessagingComposer } from "./IMessagingComposer.sol";
import { IMessagingChannel } from "./IMessagingChannel.sol";
import { IMessagingContext } from "./IMessagingContext.sol";

struct MessagingParams {
    uint32 dstEid;
    bytes32 receiver;
    bytes message;
    bytes options;
    bool payInLzToken;
}

struct MessagingReceipt {
    bytes32 guid;
    uint64 nonce;
    MessagingFee fee;
}

struct MessagingFee {
    uint256 nativeFee;
    uint256 lzTokenFee;
}

struct Origin {
    uint32 srcEid;
    bytes32 sender;
    uint64 nonce;
}

interface ILayerZeroEndpointV2 is IMessageLibManager, IMessagingComposer, IMessagingChannel, IMessagingContext {
    event PacketSent(bytes encodedPayload, bytes options, address sendLibrary);

    event PacketVerified(Origin origin, address receiver, bytes32 payloadHash);

    event PacketDelivered(Origin origin, address receiver);

    event LzReceiveAlert(
        address indexed receiver,
        address indexed executor,
        Origin origin,
        bytes32 guid,
        uint256 gas,
        uint256 value,
        bytes message,
        bytes extraData,
        bytes reason
    );

    event LzTokenSet(address token);

    event DelegateSet(address sender, address delegate);

    function quote(MessagingParams calldata _params, address _sender) external view returns (MessagingFee memory);

    function send(
        MessagingParams calldata _params,
        address _refundAddress
    ) external payable returns (MessagingReceipt memory);

    function verify(Origin calldata _origin, address _receiver, bytes32 _payloadHash) external;

    function verifiable(Origin calldata _origin, address _receiver) external view returns (bool);

    function initializable(Origin calldata _origin, address _receiver) external view returns (bool);

    function lzReceive(
        Origin calldata _origin,
        address _receiver,
        bytes32 _guid,
        bytes calldata _message,
        bytes calldata _extraData
    ) external payable;

    // oapp can burn messages partially by calling this function with its own business logic if messages are verified in order
    function clear(address _oapp, Origin calldata _origin, bytes32 _guid, bytes calldata _message) external;

    function setLzToken(address _lzToken) external;

    function lzToken() external view returns (address);

    function nativeToken() external view returns (address);

    function setDelegate(address _delegate) external;
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

import { IERC165 } from "@openzeppelin/contracts/utils/introspection/IERC165.sol";

import { SetConfigParam } from "./IMessageLibManager.sol";

enum MessageLibType {
    Send,
    Receive,
    SendAndReceive
}

interface IMessageLib is IERC165 {
    function setConfig(address _oapp, SetConfigParam[] calldata _config) external;

    function getConfig(uint32 _eid, address _oapp, uint32 _configType) external view returns (bytes memory config);

    function isSupportedEid(uint32 _eid) external view returns (bool);

    // message libs of same major version are compatible
    function version() external view returns (uint64 major, uint8 minor, uint8 endpointVersion);

    function messageLibType() external view returns (MessageLibType);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

struct SetConfigParam {
    uint32 eid;
    uint32 configType;
    bytes config;
}

interface IMessageLibManager {
    struct Timeout {
        address lib;
        uint256 expiry;
    }

    event LibraryRegistered(address newLib);
    event DefaultSendLibrarySet(uint32 eid, address newLib);
    event DefaultReceiveLibrarySet(uint32 eid, address newLib);
    event DefaultReceiveLibraryTimeoutSet(uint32 eid, address oldLib, uint256 expiry);
    event SendLibrarySet(address sender, uint32 eid, address newLib);
    event ReceiveLibrarySet(address receiver, uint32 eid, address newLib);
    event ReceiveLibraryTimeoutSet(address receiver, uint32 eid, address oldLib, uint256 timeout);

    function registerLibrary(address _lib) external;

    function isRegisteredLibrary(address _lib) external view returns (bool);

    function getRegisteredLibraries() external view returns (address[] memory);

    function setDefaultSendLibrary(uint32 _eid, address _newLib) external;

    function defaultSendLibrary(uint32 _eid) external view returns (address);

    function setDefaultReceiveLibrary(uint32 _eid, address _newLib, uint256 _gracePeriod) external;

    function defaultReceiveLibrary(uint32 _eid) external view returns (address);

    function setDefaultReceiveLibraryTimeout(uint32 _eid, address _lib, uint256 _expiry) external;

    function defaultReceiveLibraryTimeout(uint32 _eid) external view returns (address lib, uint256 expiry);

    function isSupportedEid(uint32 _eid) external view returns (bool);

    function isValidReceiveLibrary(address _receiver, uint32 _eid, address _lib) external view returns (bool);

    /// ------------------- OApp interfaces -------------------
    function setSendLibrary(address _oapp, uint32 _eid, address _newLib) external;

    function getSendLibrary(address _sender, uint32 _eid) external view returns (address lib);

    function isDefaultSendLibrary(address _sender, uint32 _eid) external view returns (bool);

    function setReceiveLibrary(address _oapp, uint32 _eid, address _newLib, uint256 _gracePeriod) external;

    function getReceiveLibrary(address _receiver, uint32 _eid) external view returns (address lib, bool isDefault);

    function setReceiveLibraryTimeout(address _oapp, uint32 _eid, address _lib, uint256 _expiry) external;

    function receiveLibraryTimeout(address _receiver, uint32 _eid) external view returns (address lib, uint256 expiry);

    function setConfig(address _oapp, address _lib, SetConfigParam[] calldata _params) external;

    function getConfig(
        address _oapp,
        address _lib,
        uint32 _eid,
        uint32 _configType
    ) external view returns (bytes memory config);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

interface IMessagingChannel {
    event InboundNonceSkipped(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce);
    event PacketNilified(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce, bytes32 payloadHash);
    event PacketBurnt(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce, bytes32 payloadHash);

    function eid() external view returns (uint32);

    // this is an emergency function if a message cannot be verified for some reasons
    // required to provide _nextNonce to avoid race condition
    function skip(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce) external;

    function nilify(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce, bytes32 _payloadHash) external;

    function burn(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce, bytes32 _payloadHash) external;

    function nextGuid(address _sender, uint32 _dstEid, bytes32 _receiver) external view returns (bytes32);

    function inboundNonce(address _receiver, uint32 _srcEid, bytes32 _sender) external view returns (uint64);

    function outboundNonce(address _sender, uint32 _dstEid, bytes32 _receiver) external view returns (uint64);

    function inboundPayloadHash(
        address _receiver,
        uint32 _srcEid,
        bytes32 _sender,
        uint64 _nonce
    ) external view returns (bytes32);

    function lazyInboundNonce(address _receiver, uint32 _srcEid, bytes32 _sender) external view returns (uint64);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

interface IMessagingComposer {
    event ComposeSent(address from, address to, bytes32 guid, uint16 index, bytes message);
    event ComposeDelivered(address from, address to, bytes32 guid, uint16 index);
    event LzComposeAlert(
        address indexed from,
        address indexed to,
        address indexed executor,
        bytes32 guid,
        uint16 index,
        uint256 gas,
        uint256 value,
        bytes message,
        bytes extraData,
        bytes reason
    );

    function composeQueue(
        address _from,
        address _to,
        bytes32 _guid,
        uint16 _index
    ) external view returns (bytes32 messageHash);

    function sendCompose(address _to, bytes32 _guid, uint16 _index, bytes calldata _message) external;

    function lzCompose(
        address _from,
        address _to,
        bytes32 _guid,
        uint16 _index,
        bytes calldata _message,
        bytes calldata _extraData
    ) external payable;
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

interface IMessagingContext {
    function isSendingMessage() external view returns (bool);

    function getSendContext() external view returns (uint32 dstEid, address sender);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

import { MessagingFee } from "./ILayerZeroEndpointV2.sol";
import { IMessageLib } from "./IMessageLib.sol";

struct Packet {
    uint64 nonce;
    uint32 srcEid;
    address sender;
    uint32 dstEid;
    bytes32 receiver;
    bytes32 guid;
    bytes message;
}

interface ISendLib is IMessageLib {
    function send(
        Packet calldata _packet,
        bytes calldata _options,
        bool _payInLzToken
    ) external returns (MessagingFee memory, bytes memory encodedPacket);

    function quote(
        Packet calldata _packet,
        bytes calldata _options,
        bool _payInLzToken
    ) external view returns (MessagingFee memory);

    function setTreasury(address _treasury) external;

    function withdrawFee(address _to, uint256 _amount) external;

    function withdrawLzTokenFee(address _lzToken, address _to, uint256 _amount) external;
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

library AddressCast {
    error AddressCast_InvalidSizeForAddress();
    error AddressCast_InvalidAddress();

    function toBytes32(bytes calldata _addressBytes) internal pure returns (bytes32 result) {
        if (_addressBytes.length > 32) revert AddressCast_InvalidAddress();
        result = bytes32(_addressBytes);
        unchecked {
            uint256 offset = 32 - _addressBytes.length;
            result = result >> (offset * 8);
        }
    }

    function toBytes32(address _address) internal pure returns (bytes32 result) {
        result = bytes32(uint256(uint160(_address)));
    }

    function toBytes(bytes32 _addressBytes32, uint256 _size) internal pure returns (bytes memory result) {
        if (_size == 0 || _size > 32) revert AddressCast_InvalidSizeForAddress();
        result = new bytes(_size);
        unchecked {
            uint256 offset = 256 - _size * 8;
            assembly {
                mstore(add(result, 32), shl(offset, _addressBytes32))
            }
        }
    }

    function toAddress(bytes32 _addressBytes32) internal pure returns (address result) {
        result = address(uint160(uint256(_addressBytes32)));
    }

    function toAddress(bytes calldata _addressBytes) internal pure returns (address result) {
        if (_addressBytes.length != 20) revert AddressCast_InvalidAddress();
        result = address(bytes20(_addressBytes));
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

library CalldataBytesLib {
    function toU8(bytes calldata _bytes, uint256 _start) internal pure returns (uint8) {
        return uint8(_bytes[_start]);
    }

    function toU16(bytes calldata _bytes, uint256 _start) internal pure returns (uint16) {
        unchecked {
            uint256 end = _start + 2;
            return uint16(bytes2(_bytes[_start:end]));
        }
    }

    function toU32(bytes calldata _bytes, uint256 _start) internal pure returns (uint32) {
        unchecked {
            uint256 end = _start + 4;
            return uint32(bytes4(_bytes[_start:end]));
        }
    }

    function toU64(bytes calldata _bytes, uint256 _start) internal pure returns (uint64) {
        unchecked {
            uint256 end = _start + 8;
            return uint64(bytes8(_bytes[_start:end]));
        }
    }

    function toU128(bytes calldata _bytes, uint256 _start) internal pure returns (uint128) {
        unchecked {
            uint256 end = _start + 16;
            return uint128(bytes16(_bytes[_start:end]));
        }
    }

    function toU256(bytes calldata _bytes, uint256 _start) internal pure returns (uint256) {
        unchecked {
            uint256 end = _start + 32;
            return uint256(bytes32(_bytes[_start:end]));
        }
    }

    function toAddr(bytes calldata _bytes, uint256 _start) internal pure returns (address) {
        unchecked {
            uint256 end = _start + 20;
            return address(bytes20(_bytes[_start:end]));
        }
    }

    function toB32(bytes calldata _bytes, uint256 _start) internal pure returns (bytes32) {
        unchecked {
            uint256 end = _start + 32;
            return bytes32(_bytes[_start:end]);
        }
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

library Transfer {
    using SafeERC20 for IERC20;

    address internal constant ADDRESS_ZERO = address(0);

    error Transfer_NativeFailed(address _to, uint256 _value);
    error Transfer_ToAddressIsZero();

    function native(address _to, uint256 _value) internal {
        if (_to == ADDRESS_ZERO) revert Transfer_ToAddressIsZero();
        (bool success, ) = _to.call{ value: _value }("");
        if (!success) revert Transfer_NativeFailed(_to, _value);
    }

    function token(address _token, address _to, uint256 _value) internal {
        if (_to == ADDRESS_ZERO) revert Transfer_ToAddressIsZero();
        IERC20(_token).safeTransfer(_to, _value);
    }

    function nativeOrToken(address _token, address _to, uint256 _value) internal {
        if (_token == ADDRESS_ZERO) {
            native(_to, _value);
        } else {
            token(_token, _to, _value);
        }
    }
}

// SPDX-License-Identifier: MIT

// modified from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/structs/BitMaps.sol
pragma solidity ^0.8.20;

type BitMap256 is uint256;

using BitMaps for BitMap256 global;

library BitMaps {
    /**
     * @dev Returns whether the bit at `index` is set.
     */
    function get(BitMap256 bitmap, uint8 index) internal pure returns (bool) {
        uint256 mask = 1 << index;
        return BitMap256.unwrap(bitmap) & mask != 0;
    }

    /**
     * @dev Sets the bit at `index`.
     */
    function set(BitMap256 bitmap, uint8 index) internal pure returns (BitMap256) {
        uint256 mask = 1 << index;
        return BitMap256.wrap(BitMap256.unwrap(bitmap) | mask);
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { CalldataBytesLib } from "../../libs/CalldataBytesLib.sol";

library ExecutorOptions {
    using CalldataBytesLib for bytes;

    uint8 internal constant WORKER_ID = 1;

    uint8 internal constant OPTION_TYPE_LZRECEIVE = 1;
    uint8 internal constant OPTION_TYPE_NATIVE_DROP = 2;
    uint8 internal constant OPTION_TYPE_LZCOMPOSE = 3;
    uint8 internal constant OPTION_TYPE_ORDERED_EXECUTION = 4;

    error Executor_InvalidLzReceiveOption();
    error Executor_InvalidNativeDropOption();
    error Executor_InvalidLzComposeOption();

    /// @dev decode the next executor option from the options starting from the specified cursor
    /// @param _options [executor_id][executor_option][executor_id][executor_option]...
    ///        executor_option = [option_size][option_type][option]
    ///        option_size = len(option_type) + len(option)
    ///        executor_id: uint8, option_size: uint16, option_type: uint8, option: bytes
    /// @param _cursor the cursor to start decoding from
    /// @return optionType the type of the option
    /// @return option the option of the executor
    /// @return cursor the cursor to start decoding the next executor option
    function nextExecutorOption(
        bytes calldata _options,
        uint256 _cursor
    ) internal pure returns (uint8 optionType, bytes calldata option, uint256 cursor) {
        unchecked {
            // skip worker id
            cursor = _cursor + 1;

            // read option size
            uint16 size = _options.toU16(cursor);
            cursor += 2;

            // read option type
            optionType = _options.toU8(cursor);

            // startCursor and endCursor are used to slice the option from _options
            uint256 startCursor = cursor + 1; // skip option type
            uint256 endCursor = cursor + size;
            option = _options[startCursor:endCursor];
            cursor += size;
        }
    }

    function decodeLzReceiveOption(bytes calldata _option) internal pure returns (uint128 gas, uint128 value) {
        if (_option.length != 16 && _option.length != 32) revert Executor_InvalidLzReceiveOption();
        gas = _option.toU128(0);
        value = _option.length == 32 ? _option.toU128(16) : 0;
    }

    function decodeNativeDropOption(bytes calldata _option) internal pure returns (uint128 amount, bytes32 receiver) {
        if (_option.length != 48) revert Executor_InvalidNativeDropOption();
        amount = _option.toU128(0);
        receiver = _option.toB32(16);
    }

    function decodeLzComposeOption(
        bytes calldata _option
    ) internal pure returns (uint16 index, uint128 gas, uint128 value) {
        if (_option.length != 18 && _option.length != 34) revert Executor_InvalidLzComposeOption();
        index = _option.toU16(0);
        gas = _option.toU128(2);
        value = _option.length == 34 ? _option.toU128(18) : 0;
    }

    function encodeLzReceiveOption(uint128 _gas, uint128 _value) internal pure returns (bytes memory) {
        return _value == 0 ? abi.encodePacked(_gas) : abi.encodePacked(_gas, _value);
    }

    function encodeNativeDropOption(uint128 _amount, bytes32 _receiver) internal pure returns (bytes memory) {
        return abi.encodePacked(_amount, _receiver);
    }

    function encodeLzComposeOption(uint16 _index, uint128 _gas, uint128 _value) internal pure returns (bytes memory) {
        return _value == 0 ? abi.encodePacked(_index, _gas) : abi.encodePacked(_index, _gas, _value);
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { Packet } from "../../interfaces/ISendLib.sol";
import { AddressCast } from "../../libs/AddressCast.sol";

library PacketV1Codec {
    using AddressCast for address;
    using AddressCast for bytes32;

    uint8 internal constant PACKET_VERSION = 1;

    // header (version + nonce + path)
    // version
    uint256 private constant PACKET_VERSION_OFFSET = 0;
    //    nonce
    uint256 private constant NONCE_OFFSET = 1;
    //    path
    uint256 private constant SRC_EID_OFFSET = 9;
    uint256 private constant SENDER_OFFSET = 13;
    uint256 private constant DST_EID_OFFSET = 45;
    uint256 private constant RECEIVER_OFFSET = 49;
    // payload (guid + message)
    uint256 private constant GUID_OFFSET = 81; // keccak256(nonce + path)
    uint256 private constant MESSAGE_OFFSET = 113;

    function encode(Packet memory _packet) internal pure returns (bytes memory encodedPacket) {
        encodedPacket = abi.encodePacked(
            PACKET_VERSION,
            _packet.nonce,
            _packet.srcEid,
            _packet.sender.toBytes32(),
            _packet.dstEid,
            _packet.receiver,
            _packet.guid,
            _packet.message
        );
    }

    function encodePacketHeader(Packet memory _packet) internal pure returns (bytes memory) {
        return
            abi.encodePacked(
                PACKET_VERSION,
                _packet.nonce,
                _packet.srcEid,
                _packet.sender.toBytes32(),
                _packet.dstEid,
                _packet.receiver
            );
    }

    function encodePayload(Packet memory _packet) internal pure returns (bytes memory) {
        return abi.encodePacked(_packet.guid, _packet.message);
    }

    function header(bytes calldata _packet) internal pure returns (bytes calldata) {
        return _packet[0:GUID_OFFSET];
    }

    function version(bytes calldata _packet) internal pure returns (uint8) {
        return uint8(bytes1(_packet[PACKET_VERSION_OFFSET:NONCE_OFFSET]));
    }

    function nonce(bytes calldata _packet) internal pure returns (uint64) {
        return uint64(bytes8(_packet[NONCE_OFFSET:SRC_EID_OFFSET]));
    }

    function srcEid(bytes calldata _packet) internal pure returns (uint32) {
        return uint32(bytes4(_packet[SRC_EID_OFFSET:SENDER_OFFSET]));
    }

    function sender(bytes calldata _packet) internal pure returns (bytes32) {
        return bytes32(_packet[SENDER_OFFSET:DST_EID_OFFSET]);
    }

    function senderAddressB20(bytes calldata _packet) internal pure returns (address) {
        return sender(_packet).toAddress();
    }

    function dstEid(bytes calldata _packet) internal pure returns (uint32) {
        return uint32(bytes4(_packet[DST_EID_OFFSET:RECEIVER_OFFSET]));
    }

    function receiver(bytes calldata _packet) internal pure returns (bytes32) {
        return bytes32(_packet[RECEIVER_OFFSET:GUID_OFFSET]);
    }

    function receiverB20(bytes calldata _packet) internal pure returns (address) {
        return receiver(_packet).toAddress();
    }

    function guid(bytes calldata _packet) internal pure returns (bytes32) {
        return bytes32(_packet[GUID_OFFSET:MESSAGE_OFFSET]);
    }

    function message(bytes calldata _packet) internal pure returns (bytes calldata) {
        return bytes(_packet[MESSAGE_OFFSET:]);
    }

    function payload(bytes calldata _packet) internal pure returns (bytes calldata) {
        return bytes(_packet[GUID_OFFSET:]);
    }

    function payloadHash(bytes calldata _packet) internal pure returns (bytes32) {
        return keccak256(payload(_packet));
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity >=0.7.0;
pragma abicoder v2;

interface ILayerZeroUltraLightNodeV2 {
    // Relayer functions
    function validateTransactionProof(
        uint16 _srcChainId,
        address _dstAddress,
        uint _gasLimit,
        bytes32 _lookupHash,
        bytes32 _blockData,
        bytes calldata _transactionProof
    ) external;

    // an Oracle delivers the block data using updateHash()
    function updateHash(uint16 _srcChainId, bytes32 _lookupHash, uint _confirmations, bytes32 _blockData) external;

    // can only withdraw the receivable of the msg.sender
    function withdrawNative(address payable _to, uint _amount) external;

    function withdrawZRO(address _to, uint _amount) external;

    // view functions
    function getAppConfig(
        uint16 _remoteChainId,
        address _userApplicationAddress
    ) external view returns (ApplicationConfiguration memory);

    function accruedNativeFee(address _address) external view returns (uint);

    struct ApplicationConfiguration {
        uint16 inboundProofLibraryVersion;
        uint64 inboundBlockConfirmations;
        address relayer;
        uint16 outboundProofType;
        uint64 outboundBlockConfirmations;
        address oracle;
    }

    event HashReceived(
        uint16 indexed srcChainId,
        address indexed oracle,
        bytes32 lookupHash,
        bytes32 blockData,
        uint confirmations
    );
    event RelayerParams(bytes adapterParams, uint16 outboundProofType);
    event Packet(bytes payload);
    event InvalidDst(
        uint16 indexed srcChainId,
        bytes srcAddress,
        address indexed dstAddress,
        uint64 nonce,
        bytes32 payloadHash
    );
    event PacketReceived(
        uint16 indexed srcChainId,
        bytes srcAddress,
        address indexed dstAddress,
        uint64 nonce,
        bytes32 payloadHash
    );
    event AppConfigUpdated(address indexed userApplication, uint indexed configType, bytes newConfig);
    event AddInboundProofLibraryForChain(uint16 indexed chainId, address lib);
    event EnableSupportedOutboundProof(uint16 indexed chainId, uint16 proofType);
    event SetChainAddressSize(uint16 indexed chainId, uint size);
    event SetDefaultConfigForChainId(
        uint16 indexed chainId,
        uint16 inboundProofLib,
        uint64 inboundBlockConfirm,
        address relayer,
        uint16 outboundProofType,
        uint64 outboundBlockConfirm,
        address oracle
    );
    event SetDefaultAdapterParamsForChainId(uint16 indexed chainId, uint16 indexed proofType, bytes adapterParams);
    event SetLayerZeroToken(address indexed tokenAddress);
    event SetRemoteUln(uint16 indexed chainId, bytes32 uln);
    event SetTreasury(address indexed treasuryAddress);
    event WithdrawZRO(address indexed msgSender, address indexed to, uint amount);
    event WithdrawNative(address indexed msgSender, address indexed to, uint amount);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized != type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)

pragma solidity ^0.8.0;
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/AccessControl.sol)

pragma solidity ^0.8.0;

import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```solidity
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```solidity
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(account),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV // Deprecated in v4.8
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            /// @solidity memory-safe-assembly
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 message) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, "\x19Ethereum Signed Message:\n32")
            mstore(0x1c, hash)
            message := keccak256(0x00, 0x3c)
        }
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 data) {
        /// @solidity memory-safe-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, "\x19\x01")
            mstore(add(ptr, 0x02), domainSeparator)
            mstore(add(ptr, 0x22), structHash)
            data := keccak256(ptr, 0x42)
        }
    }

    /**
     * @dev Returns an Ethereum Signed Data with intended validator, created from a
     * `validator` and `data` according to the version 0 of EIP-191.
     *
     * See {recover}.
     */
    function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x00", validator, data));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits");
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits");
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits");
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.2._
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits");
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits");
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits");
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits");
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits");
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits");
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits");
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits");
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits");
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits");
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits");
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v2.5._
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits");
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits");
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits");
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.2._
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits");
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits");
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits");
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v2.5._
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits");
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits");
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits");
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v2.5._
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits");
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v2.5._
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v2.5._
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     *
     * _Available since v3.0._
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 248 bits");
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 240 bits");
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 232 bits");
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.7._
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 224 bits");
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 216 bits");
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 208 bits");
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 200 bits");
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 192 bits");
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 184 bits");
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 176 bits");
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 168 bits");
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 160 bits");
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 152 bits");
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 144 bits");
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 136 bits");
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 128 bits");
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 120 bits");
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 112 bits");
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 104 bits");
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.7._
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 96 bits");
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 88 bits");
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 80 bits");
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 72 bits");
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 64 bits");
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 56 bits");
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 48 bits");
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 40 bits");
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 32 bits");
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 24 bits");
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 16 bits");
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 8 bits");
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     *
     * _Available since v3.0._
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/Math.sol";
import "./math/SignedMath.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toString(int256 value) internal pure returns (string memory) {
        return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/EnumerableSet.sol)
// This file was procedurally generated from scripts/generate/templates/EnumerableSet.js.

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```solidity
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 *
 * [WARNING]
 * ====
 * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure
 * unusable.
 * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
 *
 * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an
 * array of EnumerableSet.
 * ====
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastValue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastValue;
                // Update the index for the moved value
                set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        bytes32[] memory store = _values(set._inner);
        bytes32[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

interface ILayerZeroPriceFeed {
    /**
     * @dev
     * priceRatio: (USD price of 1 unit of remote native token in unit of local native token) * PRICE_RATIO_DENOMINATOR
     */

    struct Price {
        uint128 priceRatio; // float value * 10 ^ 20, decimal awared. for aptos to evm, the basis would be (10^18 / 10^8) * 10 ^20 = 10 ^ 30.
        uint64 gasPriceInUnit; // for evm, it is in wei, for aptos, it is in octas.
        uint32 gasPerByte;
    }

    struct UpdatePrice {
        uint32 eid;
        Price price;
    }

    /**
     * @dev
     *    ArbGasInfo.go:GetPricesInArbGas
     *
     */
    struct ArbitrumPriceExt {
        uint64 gasPerL2Tx; // L2 overhead
        uint32 gasPerL1CallDataByte;
    }

    struct UpdatePriceExt {
        uint32 eid;
        Price price;
        ArbitrumPriceExt extend;
    }

    error LZ_PriceFeed_OnlyPriceUpdater();
    error LZ_PriceFeed_InsufficientFee(uint256 provided, uint256 required);
    error LZ_PriceFeed_NotAnOPStack(uint32 l2Eid);

    function nativeTokenPriceUSD() external view returns (uint128);

    function getFee(uint32 _dstEid, uint256 _callDataSize, uint256 _gas) external view returns (uint256);

    function getPrice(uint32 _dstEid) external view returns (Price memory);

    function getPriceRatioDenominator() external view returns (uint128);

    function estimateFeeByEid(
        uint32 _dstEid,
        uint256 _callDataSize,
        uint256 _gas
    ) external view returns (uint256 fee, uint128 priceRatio, uint128 priceRatioDenominator, uint128 nativePriceUSD);

    function estimateFeeOnSend(
        uint32 _dstEid,
        uint256 _callDataSize,
        uint256 _gas
    ) external payable returns (uint256 fee, uint128 priceRatio, uint128 priceRatioDenominator, uint128 nativePriceUSD);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

interface ILayerZeroReadExecutor {
    // @notice query price and assign jobs at the same time
    // @param _sender - the source sending contract address. executors may apply price discrimination to senders
    // @param _options - optional parameters for extra service plugins, e.g. sending dust tokens at the destination chain
    function assignJob(address _sender, bytes calldata _options) external returns (uint256 fee);

    // @notice query the executor price for executing the payload on this chain
    // @param _sender - the source sending contract address. executors may apply price discrimination to senders
    // @param _options - optional parameters for extra service plugins, e.g. sending dust tokens
    function getFee(address _sender, bytes calldata _options) external view returns (uint256 fee);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

interface ILayerZeroTreasury {
    function getFee(
        address _sender,
        uint32 _dstEid,
        uint256 _totalNativeFee,
        bool _payInLzToken
    ) external view returns (uint256 fee);

    function payFee(
        address _sender,
        uint32 _dstEid,
        uint256 _totalNativeFee,
        bool _payInLzToken
    ) external payable returns (uint256 fee);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

interface IWorker {
    event SetWorkerLib(address workerLib);
    event SetPriceFeed(address priceFeed);
    event SetDefaultMultiplierBps(uint16 multiplierBps);
    event SetSupportedOptionTypes(uint32 dstEid, uint8[] optionTypes);
    event Withdraw(address lib, address to, uint256 amount);

    error Worker_NotAllowed();
    error Worker_OnlyMessageLib();
    error Worker_RoleRenouncingDisabled();

    function setPriceFeed(address _priceFeed) external;

    function priceFeed() external view returns (address);

    function setDefaultMultiplierBps(uint16 _multiplierBps) external;

    function defaultMultiplierBps() external view returns (uint16);

    function withdrawFee(address _lib, address _to, uint256 _amount) external;

    function setSupportedOptionTypes(uint32 _eid, uint8[] calldata _optionTypes) external;

    function getSupportedOptionTypes(uint32 _eid) external view returns (uint8[] memory);
}

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

pragma solidity ^0.8.20;

/// @dev copied from https://github.com/nomad-xyz/ExcessivelySafeCall/blob/main/src/ExcessivelySafeCall.sol.
library SafeCall {
    /// @notice calls a contract with a specified gas limit and value and captures the return data
    /// @param _target The address to call
    /// @param _gas The amount of gas to forward to the remote contract
    /// @param _value The value in wei to send to the remote contract
    /// to memory.
    /// @param _maxCopy The maximum number of bytes of returndata to copy
    /// to memory.
    /// @param _calldata The data to send to the remote contract
    /// @return success and returndata, as `.call()`. Returndata is capped to
    /// `_maxCopy` bytes.
    function safeCall(
        address _target,
        uint256 _gas,
        uint256 _value,
        uint16 _maxCopy,
        bytes memory _calldata
    ) internal returns (bool, bytes memory) {
        // check that target has code
        uint size;
        assembly {
            size := extcodesize(_target)
        }
        if (size == 0) {
            return (false, new bytes(0));
        }

        // set up for assembly call
        uint256 _toCopy;
        bool _success;
        bytes memory _returnData = new bytes(_maxCopy);
        // dispatch message to recipient
        // by assembly calling "handle" function
        // we call via assembly to avoid memcopying a very large returndata
        // returned by a malicious contract
        assembly {
            _success := call(
                _gas, // gas
                _target, // recipient
                _value, // ether value
                add(_calldata, 0x20), // inloc
                mload(_calldata), // inlen
                0, // outloc
                0 // outlen
            )
            // limit our copy to 100 bytes
            _toCopy := returndatasize()
            if gt(_toCopy, _maxCopy) {
                _toCopy := _maxCopy
            }
            // Store the length of the copied bytes
            mstore(_returnData, _toCopy)
            // copy the bytes from returndata[0:_toCopy]
            returndatacopy(add(_returnData, 0x20), 0, _toCopy)
        }
        return (_success, _returnData);
    }

    /// @notice Use when you _really_ really _really_ don't trust the called
    /// contract. This prevents the called contract from causing reversion of
    /// the caller in as many ways as we can.
    /// @dev The main difference between this and a solidity low-level call is
    /// that we limit the number of bytes that the callee can cause to be
    /// copied to caller memory. This prevents stupid things like malicious
    /// contracts returning 10,000,000 bytes causing a local OOG when copying
    /// to memory.
    /// @param _target The address to call
    /// @param _gas The amount of gas to forward to the remote contract
    /// @param _maxCopy The maximum number of bytes of returndata to copy
    /// to memory.
    /// @param _calldata The data to send to the remote contract
    /// @return success and returndata, as `.call()`. Returndata is capped to
    /// `_maxCopy` bytes.
    function safeStaticCall(
        address _target,
        uint256 _gas,
        uint16 _maxCopy,
        bytes memory _calldata
    ) internal view returns (bool, bytes memory) {
        // check that target has code
        uint size;
        assembly {
            size := extcodesize(_target)
        }
        if (size == 0) {
            return (false, new bytes(0));
        }

        // set up for assembly call
        uint256 _toCopy;
        bool _success;
        bytes memory _returnData = new bytes(_maxCopy);
        // dispatch message to recipient
        // by assembly calling "handle" function
        // we call via assembly to avoid memcopying a very large returndata
        // returned by a malicious contract
        assembly {
            _success := staticcall(
                _gas, // gas
                _target, // recipient
                add(_calldata, 0x20), // inloc
                mload(_calldata), // inlen
                0, // outloc
                0 // outlen
            )
            // limit our copy to 256 bytes
            _toCopy := returndatasize()
            if gt(_toCopy, _maxCopy) {
                _toCopy := _maxCopy
            }
            // Store the length of the copied bytes
            mstore(_returnData, _toCopy)
            // copy the bytes from returndata[0:_toCopy]
            returndatacopy(add(_returnData, 0x20), 0, _toCopy)
        }
        return (_success, _returnData);
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

/// @dev simply a container of endpoint address and local eid
abstract contract MessageLibBase {
    address internal immutable endpoint;
    uint32 internal immutable localEid;

    error LZ_MessageLib_OnlyEndpoint();

    modifier onlyEndpoint() {
        if (endpoint != msg.sender) revert LZ_MessageLib_OnlyEndpoint();
        _;
    }

    constructor(address _endpoint, uint32 _localEid) {
        endpoint = _endpoint;
        localEid = _localEid;
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.20;

import { IInbox } from "@arbitrum/nitro-contracts/src/bridge/IInbox.sol";

import { ArbitrumDVNAdapterL2 } from "./ArbitrumDVNAdapterL2.sol";
import { DVNAdapterBase } from "../DVNAdapterBase.sol";
import { DVNAdapterMessageCodec } from "../libs/DVNAdapterMessageCodec.sol";

contract ArbitrumDVNAdapterL1 is DVNAdapterBase {
    // --- Config Struct ---
    struct DstConfig {
        uint16 multiplierBps;
        uint256 maxSubmissionCost;
        uint256 gasLimit;
        uint256 maxFeePerGas;
    }

    // --- Events ---
    event RetryableTicketCreated(uint256 indexed ticketId);
    error OnlyArbitrum();

    uint32 public immutable arbitrumEid; // eid % 30000 (v1 eid)
    IInbox public immutable inbox;

    address public peer; // L2 adapter
    DstConfig public dstConfig;

    constructor(
        address[] memory _admins,
        uint32 _arbitrumEid,
        address _inbox
    ) DVNAdapterBase(msg.sender, _admins, 12000) {
        arbitrumEid = _arbitrumEid; // eid % 30000 (v1 eid)
        inbox = IInbox(_inbox);
    }

    // --- Admin ---
    function setPeer(address _peer) external onlyRole(ADMIN_ROLE) {
        peer = _peer;
    }

    function setDstConfig(
        uint16 _multiplierBps,
        uint256 _maxSubmissionCost,
        uint256 _gasLimit,
        uint256 _maxFeePerGas
    ) external onlyRole(ADMIN_ROLE) {
        dstConfig = DstConfig({
            multiplierBps: _multiplierBps,
            maxSubmissionCost: _maxSubmissionCost,
            gasLimit: _gasLimit,
            maxFeePerGas: _maxFeePerGas
        });
    }

    // --- Send ---
    function assignJob(
        AssignJobParam calldata _param,
        bytes calldata /*_options*/
    ) external payable override onlyRole(MESSAGE_LIB_ROLE) onlyAcl(_param.sender) returns (uint256 fee) {
        DstConfig storage config = dstConfig;
        fee = _getArbitrumFee(_param.dstEid, config);

        bytes memory payload = abi.encodeWithSelector(
            ArbitrumDVNAdapterL2.verify.selector,
            DVNAdapterMessageCodec.encode(
                receiveLibs[msg.sender][_param.dstEid],
                _param.packetHeader,
                _param.payloadHash
            )
        );

        // fee estimation: https://github.com/OffchainLabs/arbitrum-sdk/blob/main/src/lib/message/L1ToL2MessageCreator.ts#L52
        uint256 ticketID = inbox.createRetryableTicket{ value: fee }(
            peer,
            0,
            config.maxSubmissionCost,
            peer,
            peer,
            config.gasLimit,
            config.maxFeePerGas,
            payload
        );
        emit RetryableTicketCreated(ticketID);

        // adjust fee based on multiplier
        //        if (workerFeeLib != address(0)) {
        //            fee = IDVNAdapterFeeLib(workerFeeLib).getFee(
        //                _param.dstEid,
        //                _param.sender,
        //                defaultMultiplierBps,
        //                config.multiplierBps,
        //                fee
        //            );
        //        }
    }

    // --- View ---
    function getFee(
        uint32 _dstEid,
        uint64 /*_confirmations*/,
        address _sender,
        bytes calldata /*_options*/
    ) public view override onlyAcl(_sender) returns (uint256 fee) {
        DstConfig storage config = dstConfig;
        fee = _getArbitrumFee(_dstEid, config);

        // adjust fee based on multiplier
        //        if (workerFeeLib != address(0)) {
        //            fee = IDVNAdapterFeeLib(workerFeeLib).getFee(
        //                _dstEid,
        //                _sender,
        //                defaultMultiplierBps,
        //                config.multiplierBps,
        //                fee
        //            );
        //        }
    }

    function _getArbitrumFee(uint32 _dstEid, DstConfig storage _dstConfig) internal view returns (uint256 fee) {
        if (_dstEid % 30000 != arbitrumEid) revert OnlyArbitrum();
        fee = _dstConfig.maxSubmissionCost + _dstConfig.gasLimit * _dstConfig.maxFeePerGas;
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.20;

import { AddressAliasHelper } from "@arbitrum/nitro-contracts/src/libraries/AddressAliasHelper.sol";

import { DVNAdapterBase } from "../DVNAdapterBase.sol";

contract ArbitrumDVNAdapterL2 is DVNAdapterBase {
    // --- Errors ---
    error UntrustedPeer(address peer);

    // --- Events ---
    event PeerSet(address peer);

    // --- Variables ---
    address public peer; // L1 adapter

    constructor(address[] memory _admins) DVNAdapterBase(msg.sender, _admins, 12000) {}

    // --- Admin ---
    function setPeer(address _peer) external onlyRole(ADMIN_ROLE) {
        peer = _peer;
        emit PeerSet(_peer);
    }

    // --- Send ---
    function assignJob(
        AssignJobParam calldata /*_param*/,
        bytes calldata /*_options*/
    ) external payable override returns (uint256) {
        revert DVNAdapter_NotImplemented();
    }

    function getFee(
        uint32 /*_dstEid*/,
        uint64 /*_confirmations*/,
        address /*_sender*/,
        bytes calldata /*_options*/
    ) external pure override returns (uint256) {
        revert DVNAdapter_NotImplemented();
    }

    // --- Receive ---
    function verify(bytes calldata _payload) external {
        // To check that message came from L1, we check that the sender is the L1 contract's L2 alias.
        if (msg.sender != AddressAliasHelper.applyL1ToL2Alias(peer)) revert UntrustedPeer(msg.sender);
        _decodeAndVerify(0, _payload); //todo: fix
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { AxelarExecutable } from "@axelar-network/axelar-gmp-sdk-solidity/contracts/executable/AxelarExecutable.sol";
import { ISendLib } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ISendLib.sol";

import { DVNAdapterBase } from "../DVNAdapterBase.sol";
import { IAxelarDVNAdapter } from "../../../interfaces/adapters/IAxelarDVNAdapter.sol";
import { IAxelarDVNAdapterFeeLib } from "../../../interfaces/adapters/IAxelarDVNAdapterFeeLib.sol";

interface ISendLibBase {
    function fees(address _worker) external view returns (uint256);
}

/// @title AxelarDVNAdapter
/// @dev How Axelar DVN Adapter works:
///  1. Estimate gas fee off-chain using the Axelar SDK.
///     refer to https://docs.axelar.dev/dev/axelarjs-sdk/axelar-query-api#estimategasfee
///  2. Pay gas fee by calling `payNativeGasForContractCall` on the AxelarGasService contract.
///     refer to https://docs.axelar.dev/dev/general-message-passing/gas-services/pay-gas#paynativegasforcontractcall
///  3. Send message by calling `callContract` on the AxelarGateway contract.
///     refer to https://docs.axelar.dev/dev/general-message-passing/gmp-messages#call-a-contract-on-chain-b-from-chain-a
///  4. Refund surplus gas fee asynchronously.
///     refer to https://docs.axelar.dev/dev/general-message-passing/gas-services/refund
/// @dev Recovery:
///  1. If not enough gas fee is paid, the message will be hangup on source chain and can `add gas` to retry.
///     refer to https://docs.axelar.dev/dev/general-message-passing/recovery#increase-gas-payment-to-the-gas-receiver-on-the-source-chain
///  2. If the message is not executed on the destination chain, you can manually retry by calling `execute` on the `ReceiveAxelarDVNAdapter` contract.
///     refer to https://docs.axelar.dev/dev/general-message-passing/recovery#manually-execute-a-transfer
/// @dev As the Gas is estimated off-chain, we need to update the gas fee periodically on-chain by calling `setNativeGasFee` with the new fee.
contract AxelarDVNAdapter is DVNAdapterBase, AxelarExecutable, IAxelarDVNAdapter {
    mapping(string srcChainName => SrcConfig) public srcConfig; // by chain name
    mapping(uint32 dstEid => DstConfig) public dstConfig; // by dstEid

    // set default multiplier to 2.5x
    constructor(
        address[] memory _admins,
        address _gateway
    ) AxelarExecutable(_gateway) DVNAdapterBase(msg.sender, _admins, 10000) {}

    // ========================= OnlyAdmin =========================
    function setDstConfig(DstConfigParam[] calldata _params) external onlyRole(ADMIN_ROLE) {
        for (uint256 i = 0; i < _params.length; i++) {
            DstConfigParam calldata param = _params[i];

            uint32 eid = param.eid % 30000;

            // set once per chainName
            // only one adapter per dvn that services both endpoint v1 and v2
            // we standardize the eid stored here with mod 30000
            if (bytes(dstConfig[eid].chainName).length == 0) {
                dstConfig[eid].chainName = param.chainName;
                dstConfig[eid].peer = param.peer;
                srcConfig[param.chainName].eid = eid;
                srcConfig[param.chainName].peer = param.peer;
            }

            dstConfig[eid].multiplierBps = param.multiplierBps;
            dstConfig[eid].nativeGasFee = param.nativeGasFee;
        }

        emit DstConfigSet(_params);
    }

    /// @notice sets message fee in native gas for destination chains.
    /// @dev Axelar does not support quoting fee on-chain. Instead, the fee needs to be obtained off-chain by querying through the Axelar SDK.
    /// @dev The fee may change over time when token prices change, requiring admins to monitor and make necessary updates to reflect the actual fee.
    /// @dev Adding a buffer to the required fee is advisable. Any surplus fee will be refunded asynchronously if it exceeds the necessary amount.
    /// https://docs.axelar.dev/dev/general-message-passing/gas-services/pay-gas
    /// https://github.com/axelarnetwork/axelarjs/blob/070c8fe061f1082e79772fdc5c4675c0237bbba2/packages/api/src/axelar-query/isomorphic.ts#L54
    /// https://github.com/axelarnetwork/axelar-cgp-solidity/blob/d4536599321774927bf9716178a9e360f8e0efac/contracts/gas-service/AxelarGasService.sol#L403
    function setNativeGasFee(NativeGasFeeParam[] calldata _params) external onlyRole(ADMIN_ROLE) {
        for (uint256 i = 0; i < _params.length; i++) {
            NativeGasFeeParam calldata param = _params[i];
            dstConfig[param.dstEid % 30000].nativeGasFee = param.nativeGasFee;
        }
        emit NativeGasFeeSet(_params);
    }

    // ========================= OnlyWorkerFeeLib =========================
    function withdrawToFeeLib(address _sendLib) external {
        if (msg.sender != workerFeeLib) revert AxelarDVNAdapter_OnlyWorkerFeeLib();

        _withdrawFeeFromSendLib(_sendLib, workerFeeLib);
    }

    // ========================= OnlyMessageLib =========================
    function assignJob(
        AssignJobParam calldata _param,
        bytes calldata _options
    ) external payable override onlyAcl(_param.sender) returns (uint totalFee) {
        bytes32 receiveLib = _getAndAssertReceiveLib(msg.sender, _param.dstEid);

        IAxelarDVNAdapterFeeLib.Param memory feeLibParam = IAxelarDVNAdapterFeeLib.Param({
            dstEid: _param.dstEid,
            confirmations: _param.confirmations,
            sender: _param.sender,
            defaultMultiplierBps: defaultMultiplierBps
        });
        DstConfig memory config = dstConfig[_param.dstEid % 30000];

        bytes memory payload = _encode(receiveLib, _param.packetHeader, _param.payloadHash);

        totalFee = IAxelarDVNAdapterFeeLib(workerFeeLib).getFeeOnSend(
            feeLibParam,
            config,
            payload,
            _options,
            msg.sender
        );

        gateway.callContract(config.chainName, config.peer, payload);
    }

    // ========================= View =========================
    function getFee(
        uint32 _dstEid,
        uint64 _confirmations,
        address _sender,
        bytes calldata _options
    ) external view override returns (uint256 totalFee) {
        IAxelarDVNAdapterFeeLib.Param memory feeLibParam = IAxelarDVNAdapterFeeLib.Param(
            _dstEid,
            _confirmations,
            _sender,
            defaultMultiplierBps
        );

        totalFee = IAxelarDVNAdapterFeeLib(workerFeeLib).getFee(feeLibParam, dstConfig[_dstEid % 30000], _options);
    }

    // ========================= Internal =========================
    function _execute(
        string calldata _sourceChain,
        string calldata _sourceAddress,
        bytes calldata _payload
    ) internal override {
        SrcConfig memory config = srcConfig[_sourceChain];

        // assert peer is the same as the source chain
        _assertPeer(_sourceChain, _sourceAddress, config.peer);

        _decodeAndVerify(config.eid, _payload);
    }

    function _assertPeer(string memory _sourceChain, string memory _sourceAddress, string memory peer) private pure {
        if (keccak256(bytes(_sourceAddress)) != keccak256(bytes(peer))) {
            revert AxelarDVNAdapter_UntrustedPeer(_sourceChain, _sourceAddress);
        }
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { Proxied } from "hardhat-deploy/solc_0.8/proxy/Proxied.sol";
import { OwnableUpgradeable } from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import { IAxelarGasService } from "@axelar-network/axelar-gmp-sdk-solidity/contracts/interfaces/IAxelarGasService.sol";
import { Transfer } from "@layerzerolabs/lz-evm-protocol-v2/contracts/libs/Transfer.sol";

import { IAxelarDVNAdapter } from "../../../interfaces/adapters/IAxelarDVNAdapter.sol";
import { IAxelarDVNAdapterFeeLib } from "../../../interfaces/adapters/IAxelarDVNAdapterFeeLib.sol";
import { ILayerZeroPriceFeed } from "../../../../interfaces/ILayerZeroPriceFeed.sol";

contract AxelarDVNAdapterFeeLib is OwnableUpgradeable, Proxied, IAxelarDVNAdapterFeeLib {
    uint16 internal constant BPS_DENOMINATOR = 10000;

    /// @dev to be applied to native gas fee before sending to Axelar Gas Service
    uint16 public nativeGasFeeMultiplierBps;

    IAxelarDVNAdapter public dvn;
    IAxelarGasService public gasService;
    ILayerZeroPriceFeed public priceFeed;

    mapping(uint32 dstEid => DstConfig) public dstConfig;

    function initialize(
        address _gasService,
        address _dvn,
        uint16 _nativeGasFeeMultiplierBps
    ) external proxied initializer {
        __Ownable_init();
        gasService = IAxelarGasService(_gasService);
        dvn = IAxelarDVNAdapter(_dvn);
        nativeGasFeeMultiplierBps = _nativeGasFeeMultiplierBps;
    }

    // ================================ OnlyOwner ================================
    function withdrawToken(address _token, address _to, uint256 _amount) external onlyOwner {
        // transfers native if _token is address(0x0)
        Transfer.nativeOrToken(_token, _to, _amount);
        emit TokenWithdrawn(_token, _to, _amount);
    }

    function setGasService(address _gasService) external onlyOwner {
        gasService = IAxelarGasService(_gasService);
        emit GasServiceSet(_gasService);
    }

    function setPriceFeed(address _priceFeed) external onlyOwner {
        priceFeed = ILayerZeroPriceFeed(_priceFeed);
        emit PriceFeedSet(_priceFeed);
    }

    function setDstConfig(DstConfigParam[] calldata _param) external onlyOwner {
        for (uint256 i = 0; i < _param.length; i++) {
            DstConfigParam calldata param = _param[i];
            dstConfig[param.dstEid] = DstConfig({ gas: param.gas, floorMarginUSD: param.floorMarginUSD });
        }
        emit DstConfigSet(_param);
    }

    function setNativeGasFeeMultiplierBps(uint16 _multiplierBps) external onlyOwner {
        nativeGasFeeMultiplierBps = _multiplierBps;
        emit NativeGasFeeMultiplierBpsSet(_multiplierBps);
    }

    // ================================ External ================================
    function getFeeOnSend(
        Param calldata _param,
        IAxelarDVNAdapter.DstConfig calldata _dstConfig,
        bytes memory _payload,
        bytes calldata _options,
        address _sendLib
    ) external payable returns (uint256 totalFee) {
        if (_dstConfig.nativeGasFee == 0) revert AxelarDVNAdapter_EidNotSupported(_param.dstEid);
        if (_options.length > 0) revert AxelarDVNAdapter_OptionsUnsupported();

        totalFee = _applyPremium(_dstConfig.multiplierBps, _param.defaultMultiplierBps, _dstConfig.nativeGasFee);

        uint256 feeToAxelar = _getAxelarFeeWithBuffer(_dstConfig.nativeGasFee);
        // withdraw from uln to fee lib if not enough balance
        uint256 balance = address(this).balance;
        if (balance < feeToAxelar) {
            dvn.withdrawToFeeLib(_sendLib);

            // revert if still not enough
            balance = address(this).balance;
            if (balance < feeToAxelar) revert AxelarDVNAdapter_InsufficientBalance(balance, feeToAxelar);
        }

        // pay axelar gas service
        gasService.payNativeGasForContractCall{ value: feeToAxelar }(
            msg.sender, // sender
            _dstConfig.chainName, // destinationChain
            _dstConfig.peer, // destinationAddress
            _payload, // payload
            address(this) // refundAddress
        );
    }

    function getFee(
        Param calldata _param,
        IAxelarDVNAdapter.DstConfig calldata _dstConfig,
        bytes calldata _options
    ) external pure returns (uint256 totalFee) {
        if (_dstConfig.nativeGasFee == 0) revert AxelarDVNAdapter_EidNotSupported(_param.dstEid);
        if (_options.length > 0) revert AxelarDVNAdapter_OptionsUnsupported();

        totalFee = _applyPremium(_dstConfig.multiplierBps, _param.defaultMultiplierBps, _dstConfig.nativeGasFee);
    }

    // ================================ Internal ================================
    function _getAxelarFeeWithBuffer(uint256 _nativeGasFee) internal view returns (uint256) {
        return (_nativeGasFee * nativeGasFeeMultiplierBps) / BPS_DENOMINATOR;
    }

    function _applyPremium(
        uint16 multiplierBps,
        uint16 defaultMultiplierBps,
        uint256 fee
    ) internal pure returns (uint256) {
        uint256 multiplier = multiplierBps == 0 ? defaultMultiplierBps : multiplierBps;
        return (fee * multiplier) / BPS_DENOMINATOR;
    }

    receive() external payable {}
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { IRouterClient } from "@chainlink/contracts-ccip/src/v0.8/ccip/interfaces/IRouterClient.sol";
import { IAny2EVMMessageReceiver } from "@chainlink/contracts-ccip/src/v0.8/ccip/interfaces/IAny2EVMMessageReceiver.sol";
import { Client } from "@chainlink/contracts-ccip/src/v0.8/ccip/libraries/Client.sol";

import { DVNAdapterBase } from "../DVNAdapterBase.sol";
import { ICCIPDVNAdapter } from "../../../interfaces/adapters/ICCIPDVNAdapter.sol";
import { ICCIPDVNAdapterFeeLib } from "../../../interfaces/adapters/ICCIPDVNAdapterFeeLib.sol";

/// @title CCIPDVNAdapter
/// @dev How CCIP DVN Adapter works:
/// 1. Estimate gas cost for the message on-chain by calling `getFee` on the Router contract.
///     refer to https://docs.chain.link/ccip/api-reference/i-router-client#getfee
/// 2. Call `ccipSend` on the Router contract to send the message.
///     refer to https://docs.chain.link/ccip/api-reference/i-router-client#ccipsend
/// @dev Recovery:
/// 1. If not enough gas paid, the message will be failed to execute on the destination chain, you can manually retry by calling `manuallyExecute` on the `OffRamp` contract.
///     refer to https://github.com/smartcontractkit/ccip/blob/ccip-develop/contracts/src/v0.8/ccip/offRamp/EVM2EVMOffRamp.sol#L222
contract CCIPDVNAdapter is DVNAdapterBase, IAny2EVMMessageReceiver, ICCIPDVNAdapter {
    address private constant NATIVE_GAS_TOKEN_ADDRESS = address(0);

    IRouterClient public immutable router;

    mapping(uint32 dstEid => DstConfig) public dstConfig;
    mapping(uint64 srcChainSelector => SrcConfig) public srcConfig;

    constructor(address[] memory _admins, address _router) DVNAdapterBase(msg.sender, _admins, 12000) {
        router = IRouterClient(_router);
    }

    // ========================= OnlyAdmin =========================
    /// @notice sets configuration for destination chains
    /// @param _params array of chain configurations
    function setDstConfig(DstConfigParam[] calldata _params) external onlyRole(ADMIN_ROLE) {
        for (uint256 i = 0; i < _params.length; i++) {
            DstConfigParam calldata param = _params[i];

            uint32 eid = param.eid % 30000;

            // set once per chainSelector
            // only one adapter per dvn that services both endpoint v1 and v2
            // we standardize the eid stored here with mod 30000
            if (dstConfig[eid].chainSelector == 0) {
                dstConfig[eid].chainSelector = param.chainSelector;
                dstConfig[eid].peer = param.peer;
                srcConfig[param.chainSelector].eid = eid;
                srcConfig[param.chainSelector].peer = param.peer;
            }

            dstConfig[eid].multiplierBps = param.multiplierBps;
            dstConfig[eid].gas = param.gas;
        }

        emit DstConfigSet(_params);
    }

    // ========================= OnlyMessageLib =========================
    function assignJob(
        AssignJobParam calldata _param,
        bytes calldata _options
    ) external payable override onlyAcl(_param.sender) returns (uint256 totalFee) {
        bytes32 receiveLib = _getAndAssertReceiveLib(msg.sender, _param.dstEid);

        ICCIPDVNAdapterFeeLib.Param memory feeLibParam = ICCIPDVNAdapterFeeLib.Param(
            _param.dstEid,
            _param.confirmations,
            _param.sender,
            defaultMultiplierBps
        );

        DstConfig memory config = dstConfig[_param.dstEid % 30000];

        bytes memory data = _encode(receiveLib, _param.packetHeader, _param.payloadHash);
        Client.EVM2AnyMessage memory message = _createCCIPMessage(data, config.peer, config.gas);

        IRouterClient ccipRouter = router;
        uint256 ccipFee;
        (ccipFee, totalFee) = ICCIPDVNAdapterFeeLib(workerFeeLib).getFeeOnSend(
            feeLibParam,
            config,
            message,
            _options,
            ccipRouter
        );

        _assertBalanceAndWithdrawFee(msg.sender, ccipFee);

        ccipRouter.ccipSend{ value: ccipFee }(config.chainSelector, message);
    }

    // ========================= OnlyRouter =========================
    function ccipReceive(Client.Any2EVMMessage calldata _message) external {
        if (msg.sender != address(router)) revert CCIPDVNAdapter_InvalidRouter(msg.sender);

        SrcConfig memory config = srcConfig[_message.sourceChainSelector];

        _assertPeer(_message.sourceChainSelector, _message.sender, config.peer);

        _decodeAndVerify(config.eid, _message.data);
    }

    // ========================= View =========================
    function getFee(
        uint32 _dstEid,
        uint64 _confirmations,
        address _sender,
        bytes calldata _options
    ) external view override onlyAcl(_sender) returns (uint256 totalFee) {
        ICCIPDVNAdapterFeeLib.Param memory feeLibParam = ICCIPDVNAdapterFeeLib.Param(
            _dstEid,
            _confirmations,
            _sender,
            defaultMultiplierBps
        );

        DstConfig memory config = dstConfig[_dstEid % 30000];

        bytes memory data = _encodeEmpty();
        Client.EVM2AnyMessage memory message = _createCCIPMessage(data, config.peer, config.gas);

        totalFee = ICCIPDVNAdapterFeeLib(workerFeeLib).getFee(feeLibParam, config, message, _options, router);
    }

    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAny2EVMMessageReceiver).interfaceId || super.supportsInterface(interfaceId);
    }

    // ========================= Internal =========================
    function _createCCIPMessage(
        bytes memory _data,
        bytes memory _receiver,
        uint256 _gas
    ) private pure returns (Client.EVM2AnyMessage memory message) {
        message = Client.EVM2AnyMessage({
            receiver: _receiver,
            data: _data,
            tokenAmounts: new Client.EVMTokenAmount[](0), // Empty array indicating no tokens are being sent
            extraArgs: Client._argsToBytes(Client.EVMExtraArgsV1({ gasLimit: _gas, strict: false })),
            feeToken: NATIVE_GAS_TOKEN_ADDRESS
        });
    }

    function _assertPeer(uint64 _sourceChainSelector, bytes memory _sourceAddress, bytes memory peer) private pure {
        if (keccak256(_sourceAddress) != keccak256(peer)) {
            revert CCIPDVNAdapter_UntrustedPeer(_sourceChainSelector, _sourceAddress);
        }
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { Proxied } from "hardhat-deploy/solc_0.8/proxy/Proxied.sol";
import { OwnableUpgradeable } from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import { Client } from "@chainlink/contracts-ccip/src/v0.8/ccip/libraries/Client.sol";
import { IRouterClient } from "@chainlink/contracts-ccip/src/v0.8/ccip/interfaces/IRouterClient.sol";

import { ICCIPDVNAdapter } from "../../../interfaces/adapters/ICCIPDVNAdapter.sol";
import { ICCIPDVNAdapterFeeLib } from "../../../interfaces/adapters/ICCIPDVNAdapterFeeLib.sol";

contract CCIPDVNAdapterFeeLib is OwnableUpgradeable, Proxied, ICCIPDVNAdapterFeeLib {
    uint16 internal constant BPS_DENOMINATOR = 10000;

    mapping(uint32 dstEid => DstConfig) public dstConfig;

    function initialize() external proxied initializer {
        __Ownable_init();
    }

    // ================================ OnlyOwner ===============================
    function setDstConfig(DstConfigParam[] calldata _param) external onlyOwner {
        for (uint256 i = 0; i < _param.length; i++) {
            DstConfigParam calldata param = _param[i];

            dstConfig[param.dstEid] = DstConfig({ floorMarginUSD: param.floorMarginUSD });
        }

        emit DstConfigSet(_param);
    }

    // ================================ External ================================
    function getFeeOnSend(
        Param calldata _params,
        ICCIPDVNAdapter.DstConfig calldata _dstConfig,
        Client.EVM2AnyMessage calldata _message,
        bytes calldata _options,
        IRouterClient _router
    ) external payable returns (uint256 ccipFee, uint256 totalFee) {
        if (_dstConfig.gas == 0) revert CCIPDVNAdapter_EidNotSupported(_params.dstEid);
        if (_options.length > 0) revert CCIPDVNAdapter_OptionsUnsupported();

        ccipFee = _router.getFee(_dstConfig.chainSelector, _message);
        totalFee = _applyPremium(_dstConfig.multiplierBps, _params.defaultMultiplierBps, ccipFee);
    }

    function getFee(
        Param calldata _params,
        ICCIPDVNAdapter.DstConfig calldata _dstConfig,
        Client.EVM2AnyMessage calldata _message,
        bytes calldata _options,
        IRouterClient _router
    ) external view returns (uint256 totalFee) {
        if (_dstConfig.gas == 0) revert CCIPDVNAdapter_EidNotSupported(_params.dstEid);
        if (_options.length > 0) revert CCIPDVNAdapter_OptionsUnsupported();

        totalFee = _router.getFee(_dstConfig.chainSelector, _message);
        totalFee = _applyPremium(_dstConfig.multiplierBps, _params.defaultMultiplierBps, totalFee);
    }

    // ================================ Internal ================================
    function _applyPremium(
        uint16 _multiplierBps,
        uint16 _defaultMultiplierBps,
        uint256 _fee
    ) internal pure returns (uint256 fee) {
        uint256 multiplier = _multiplierBps == 0 ? _defaultMultiplierBps : _multiplierBps;
        fee = (_fee * multiplier) / BPS_DENOMINATOR;
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { Transfer } from "@layerzerolabs/lz-evm-protocol-v2/contracts/libs/Transfer.sol";
import { ISendLib } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ISendLib.sol";

import { ILayerZeroDVN } from "../../interfaces/ILayerZeroDVN.sol";
import { Worker } from "../../../Worker.sol";
import { DVNAdapterMessageCodec } from "./libs/DVNAdapterMessageCodec.sol";

interface ISendLibBase {
    function fees(address _worker) external view returns (uint256);
}

interface IReceiveUln {
    function verify(bytes calldata _packetHeader, bytes32 _payloadHash, uint64 _confirmations) external;
}

struct ReceiveLibParam {
    address sendLib;
    uint32 dstEid;
    bytes32 receiveLib;
}

/// @title SendDVNAdapterBase
/// @notice base contract for DVN adapters
/// @dev limitations:
///  - doesn't accept alt token
///  - doesn't respect block confirmations
abstract contract DVNAdapterBase is Worker, ILayerZeroDVN {
    // --- Errors ---
    error DVNAdapter_InsufficientBalance(uint256 actual, uint256 requested);
    error DVNAdapter_NotImplemented();
    error DVNAdapter_MissingRecieveLib(address sendLib, uint32 dstEid);

    event ReceiveLibsSet(ReceiveLibParam[] params);

    /// @dev on change of application config, dvn adapters will not perform any additional verification
    /// @dev to avoid messages from being stuck, all verifications from adapters will be done with the maximum possible confirmations
    uint64 internal constant MAX_CONFIRMATIONS = type(uint64).max;

    /// @dev receive lib to call verify() on at destination
    mapping(address sendLib => mapping(uint32 dstEid => bytes32 receiveLib)) public receiveLibs;

    constructor(
        address _roleAdmin,
        address[] memory _admins,
        uint16 _defaultMultiplierBps
    ) Worker(new address[](0), address(0x0), _defaultMultiplierBps, _roleAdmin, _admins) {}

    // ========================= OnlyAdmin =========================
    /// @notice sets receive lib for destination chains
    /// @dev DEFAULT_ADMIN_ROLE can set MESSAGE_LIB_ROLE for sendLibs and use below function to set receiveLibs
    function setReceiveLibs(ReceiveLibParam[] calldata _params) external onlyRole(DEFAULT_ADMIN_ROLE) {
        for (uint256 i = 0; i < _params.length; i++) {
            ReceiveLibParam calldata param = _params[i];
            receiveLibs[param.sendLib][param.dstEid] = param.receiveLib;
        }

        emit ReceiveLibsSet(_params);
    }

    // ========================= Internal =========================
    function _getAndAssertReceiveLib(address _sendLib, uint32 _dstEid) internal view returns (bytes32 lib) {
        lib = receiveLibs[_sendLib][_dstEid];
        if (lib == bytes32(0)) revert DVNAdapter_MissingRecieveLib(_sendLib, _dstEid);
    }

    function _encode(
        bytes32 _receiveLib,
        bytes memory _packetHeader,
        bytes32 _payloadHash
    ) internal pure returns (bytes memory) {
        return DVNAdapterMessageCodec.encode(_receiveLib, _packetHeader, _payloadHash);
    }

    function _encodeEmpty() internal pure returns (bytes memory) {
        return
            DVNAdapterMessageCodec.encode(bytes32(0), new bytes(DVNAdapterMessageCodec.PACKET_HEADER_SIZE), bytes32(0));
    }

    function _decodeAndVerify(uint32 _srcEid, bytes calldata _payload) internal {
        require((DVNAdapterMessageCodec.srcEid(_payload) % 30000) == _srcEid, "DVNAdapterBase: invalid srcEid");

        (address receiveLib, bytes memory packetHeader, bytes32 payloadHash) = DVNAdapterMessageCodec.decode(_payload);

        IReceiveUln(receiveLib).verify(packetHeader, payloadHash, MAX_CONFIRMATIONS);
    }

    function _withdrawFeeFromSendLib(address _sendLib, address _to) internal {
        uint256 fee = ISendLibBase(_sendLib).fees(address(this));
        if (fee > 0) {
            ISendLib(_sendLib).withdrawFee(_to, fee);
            emit Withdraw(_sendLib, _to, fee);
        }
    }

    function _assertBalanceAndWithdrawFee(address _sendLib, uint256 _messageFee) internal {
        uint256 balance = address(this).balance;
        if (balance < _messageFee) {
            // withdraw all fees from the sendLib if balance is insufficient
            _withdrawFeeFromSendLib(_sendLib, address(this));

            // check balance again
            balance = address(this).balance;
            // revert if balance is still insufficient, need to transfer more funds manually to the adapter
            if (balance < _messageFee) revert DVNAdapter_InsufficientBalance(balance, _messageFee);
        }
    }

    /// @dev to receive refund
    receive() external payable {}
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { AddressCast } from "@layerzerolabs/lz-evm-protocol-v2/contracts/libs/AddressCast.sol";

library DVNAdapterMessageCodec {
    using AddressCast for bytes32;

    error DVNAdapter_InvalidMessageSize();

    uint256 private constant RECEIVE_LIB_OFFSET = 0;
    uint256 private constant PAYLOAD_HASH_OFFSET = 32;
    uint256 private constant PACKET_HEADER_OFFSET = 64;
    uint256 private constant SRC_EID_OFFSET = 73; // 64 + 1 + 8

    uint256 internal constant PACKET_HEADER_SIZE = 81; // version(uint8) + nonce(uint64) + path(uint32,bytes32,uint32,bytes32)
    uint256 internal constant MESSAGE_SIZE = 32 + 32 + PACKET_HEADER_SIZE; // receive_lib(bytes32) + payloadHash(bytes32) + packetHeader

    function encode(
        bytes32 _receiveLib,
        bytes memory _packetHeader,
        bytes32 _payloadHash
    ) internal pure returns (bytes memory payload) {
        return abi.encodePacked(_receiveLib, _payloadHash, _packetHeader);
    }

    function decode(
        bytes calldata _message
    ) internal pure returns (address receiveLib, bytes memory packetHeader, bytes32 payloadHash) {
        if (_message.length != MESSAGE_SIZE) revert DVNAdapter_InvalidMessageSize();

        receiveLib = bytes32(_message[RECEIVE_LIB_OFFSET:PAYLOAD_HASH_OFFSET]).toAddress();
        payloadHash = bytes32(_message[PAYLOAD_HASH_OFFSET:PACKET_HEADER_OFFSET]);
        packetHeader = _message[PACKET_HEADER_OFFSET:];
    }

    function srcEid(bytes calldata _message) internal pure returns (uint32) {
        return uint32(bytes4(_message[SRC_EID_OFFSET:SRC_EID_OFFSET + 4]));
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.20;

import { ICrossDomainMessenger } from "@eth-optimism/contracts/libraries/bridge/ICrossDomainMessenger.sol";

import { OptimismDVNAdapterL2 } from "./OptimismDVNAdapterL2.sol";
import { DVNAdapterMessageCodec } from "../libs/DVNAdapterMessageCodec.sol";
import { DVNAdapterBase } from "../DVNAdapterBase.sol";

/// @title OptimismDVNAdapterL1
/// @dev How Optimism DVN adapter works:
///  1. call `sendMessage` on the L1CrossDomainMessenger contract.
///     refer to https://docs.optimism.io/builders/dapp-developers/bridging/messaging#basics-of-communication-between-layers
/// @dev Recovery:
///  1. If the message is not executed or failed to execute on the destination chain, you can manually retry by calling `relayMessage` on the `CrossDomainMessenger` contract.
///     refer to https://github.com/ethereum-optimism/optimism/blob/develop/packages/contracts-bedrock/src/universal/CrossDomainMessenger.sol#L211C14-L211C26
contract OptimismDVNAdapterL1 is DVNAdapterBase {
    // --- Errors ---
    error OnlyOptimism();
    error NoPeer();

    // --- Events ---
    event PeerSet(address indexed peer);
    event GasLimitSet(uint32 gasLimit);

    uint32 public immutable optimismEid; // eid % 30000 (v1 eid)
    address public immutable l1Messenger; // L1CrossDomainMessenger

    uint32 public gasLimit;
    address public peer;

    constructor(
        address[] memory _admins,
        uint32 _optimismEid,
        address _l1Messenger
    ) DVNAdapterBase(msg.sender, _admins, 12000) {
        optimismEid = _optimismEid; // eid % 30000 (v1 eid)
        l1Messenger = _l1Messenger;
    }

    // --- Admin ---
    function setGasLimit(uint32 _gasLimit) external onlyRole(ADMIN_ROLE) {
        gasLimit = _gasLimit;
        emit GasLimitSet(_gasLimit);
    }

    function setPeer(address _peer) external onlyRole(ADMIN_ROLE) {
        peer = _peer;
        emit PeerSet(_peer);
    }

    // --- Send ---
    function assignJob(
        AssignJobParam calldata _param,
        bytes calldata /*_options*/
    ) external payable override onlyAcl(_param.sender) returns (uint256) {
        _getAndAssertReceiveLib(msg.sender, _param.dstEid);

        if (_param.dstEid % 30000 != optimismEid) revert OnlyOptimism();
        if (peer == address(0)) revert NoPeer();

        bytes memory payload = abi.encodeWithSelector(
            OptimismDVNAdapterL2.verify.selector,
            DVNAdapterMessageCodec.encode(
                receiveLibs[msg.sender][_param.dstEid],
                _param.packetHeader,
                _param.payloadHash
            )
        );
        ICrossDomainMessenger(l1Messenger).sendMessage(peer, payload, gasLimit);

        return 0;
    }

    // --- View ---
    function getFee(
        uint32 /*_dstEid*/,
        uint64 /*_confirmations*/,
        address _sender,
        bytes calldata /*_options*/
    ) public view override onlyAcl(_sender) returns (uint256) {
        // no fee, charged as gas when sending message from L1 to L2
        return 0;
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.20;

import { ICrossDomainMessenger } from "@eth-optimism/contracts/libraries/bridge/ICrossDomainMessenger.sol";

import { DVNAdapterBase } from "../DVNAdapterBase.sol";

contract OptimismDVNAdapterL2 is DVNAdapterBase {
    // --- Errors ---
    error UntrustedPeer(address peer);
    error Unauthorized();

    // --- Events ---
    event PeerSet(address indexed peer);

    address public immutable l2Messenger; // L2CrossDomainMessenger

    address public peer;

    constructor(address[] memory _admins, address _l2Messenger) DVNAdapterBase(msg.sender, _admins, 12000) {
        l2Messenger = _l2Messenger;
    }

    // --- Admin ---
    function setPeer(address _peer) external onlyRole(ADMIN_ROLE) {
        peer = _peer;
        emit PeerSet(_peer);
    }

    // --- Send ---
    function assignJob(
        AssignJobParam calldata /*_param*/,
        bytes calldata /*_options*/
    ) external payable override returns (uint256) {
        revert DVNAdapter_NotImplemented();
    }

    function getFee(
        uint32 /*_dstEid*/,
        uint64 /*_confirmations*/,
        address /*_sender*/,
        bytes calldata /*_options*/
    ) external pure override returns (uint256) {
        revert DVNAdapter_NotImplemented();
    }

    // --- Receive ---
    function verify(bytes calldata _payload) external {
        // assert messenger
        if (msg.sender != l2Messenger) revert Unauthorized();
        // assert peer
        address xSender = ICrossDomainMessenger(l2Messenger).xDomainMessageSender();
        if (xSender != peer) revert UntrustedPeer(xSender);

        _decodeAndVerify(0, _payload); //todo: fix
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { ILayerZeroDVN } from "../interfaces/ILayerZeroDVN.sol";

contract DeadDVN is ILayerZeroDVN {
    string internal constant ERROR_NOT_ALLOWED = "Please set your OApp's DVNs and/or Executor";

    /// @dev for ULN301, ULN302 and more to assign job
    function assignJob(AssignJobParam calldata, bytes calldata) external payable returns (uint256) {
        revert(ERROR_NOT_ALLOWED);
    }

    /// @dev to support ULNv2
    function assignJob(uint16, uint16, uint64, address) external pure returns (uint256) {
        revert(ERROR_NOT_ALLOWED);
    }

    // ========================= View =========================

    function getFee(uint32, uint64, address, bytes calldata) external pure returns (uint256) {
        revert(ERROR_NOT_ALLOWED);
    }

    /// @dev to support ULNv2
    function getFee(uint16, uint16, uint64, address) public pure returns (uint256) {
        revert(ERROR_NOT_ALLOWED);
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { Transfer } from "@layerzerolabs/lz-evm-protocol-v2/contracts/libs/Transfer.sol";

import { ILayerZeroPriceFeed } from "../../interfaces/ILayerZeroPriceFeed.sol";
import { IDVN } from "../interfaces/IDVN.sol";
import { IDVNFeeLib } from "../interfaces/IDVNFeeLib.sol";
import { DVNOptions } from "../libs/DVNOptions.sol";
import { ReadCmdCodecV1 } from "../libs/ReadCmdCodecV1.sol";
import { SupportedCmdTypesLib, SupportedCmdTypes, BitMap256 } from "../libs/SupportedCmdTypes.sol";

contract DVNFeeLib is Ownable, IDVNFeeLib {
    using DVNOptions for bytes;

    struct SetSupportedCmdTypesParam {
        uint32 targetEid;
        BitMap256 types;
    }

    struct BlockTimeConfig {
        uint32 avgBlockTime; // milliseconds
        uint64 blockNum; // the block number of the reference timestamp
        uint64 timestamp; // second, the reference timestamp of the block number
        uint32 maxPastRetention; // second, the max retention time the DVN will accept read requests/compute from the past time
        uint32 maxFutureRetention; // second, the max retention time the DVN will accept read requests/compute from the future time
    }

    uint16 internal constant BPS_BASE = 10000;

    // encoded( execute(ExecuteParam[]) ): funcSigHash + params -> 4  + 32(Offset of the array) + 32(array size) + 32(first element start offset)\
    // + 32(vid) + 32(target) + 32(calldata-offset) + 32(expiration) + 32(signatures-offset) = 260
    uint16 internal constant EXECUTE_FIXED_BYTES = 260;
    uint16 internal constant SIGNATURE_RAW_BYTES = 65; // not encoded
    // verify(bytes calldata _packetHeader, bytes32 _payloadHash, uint64 _confirmations)\
    // 4 + 32(header offset) + 32(payloadHash) + 32(confirmations, 8 -> 32 padded) + 32(header-size) + 96(81 -> header-padded) = 228,
    // padded to multiples of 32 = 256, encoded as bytes with an 32 byte for the bytes size = 288
    uint16 internal constant VERIFY_BYTES_ULN = 288;
    // verify(bytes calldata _packetHeader, bytes32 _cmdHash, bytes32 _payloadHash)\
    // 4 + 32(header offset) + 32(cmdHash) + 32(payloadHash) + 32(header-size) + 96(81 -> header-padded) = 228,
    // padded to multiples of 32 = 256, encoded as bytes with an 32 byte for the bytes size = 288
    uint16 internal constant VERIFY_BYTES_CMD_LIB = 288;

    uint256 internal immutable nativeDecimalsRate;
    uint32 internal immutable localEidV2; // endpoint-v2 only, for read call

    SupportedCmdTypes internal supportedCmdTypes;

    uint120 internal evmCallRequestV1FeeUSD;
    uint120 internal evmCallComputeV1ReduceFeeUSD;
    uint16 internal evmCallComputeV1MapBps;

    mapping(uint32 dstEid => BlockTimeConfig) public dstBlockTimeConfigs;

    constructor(uint32 _localEidV2, uint256 _nativeDecimalsRate) {
        localEidV2 = _localEidV2;
        nativeDecimalsRate = _nativeDecimalsRate;
    }

    // ================================ OnlyOwner ================================
    function setSupportedCmdTypes(SetSupportedCmdTypesParam[] calldata _params) external onlyOwner {
        for (uint256 i = 0; i < _params.length; i++) {
            supportedCmdTypes.cmdTypes[_params[i].targetEid] = _params[i].types;
        }
    }

    function getSupportedCmdTypes(uint32 _targetEid) external view returns (BitMap256) {
        return supportedCmdTypes.cmdTypes[_targetEid];
    }

    function setDstBlockTimeConfigs(
        uint32[] calldata dstEids,
        BlockTimeConfig[] calldata _blockConfigs
    ) external onlyOwner {
        if (dstEids.length != _blockConfigs.length) revert DVN_INVALID_INPUT_LENGTH();
        for (uint256 i = 0; i < dstEids.length; i++) {
            dstBlockTimeConfigs[dstEids[i]] = _blockConfigs[i];
        }
    }

    function withdrawToken(address _token, address _to, uint256 _amount) external onlyOwner {
        // transfers native if _token is address(0x0)
        Transfer.nativeOrToken(_token, _to, _amount);
    }

    function setCmdFees(
        uint120 _evmCallRequestV1FeeUSD,
        uint120 _evmCallComputeV1ReduceFeeUSD,
        uint16 _evmCallComputeV1MapBps
    ) external onlyOwner {
        evmCallRequestV1FeeUSD = _evmCallRequestV1FeeUSD;
        evmCallComputeV1ReduceFeeUSD = _evmCallComputeV1ReduceFeeUSD;
        evmCallComputeV1MapBps = _evmCallComputeV1MapBps;
    }

    function getCmdFees() external view returns (uint120, uint120, uint16) {
        return (evmCallRequestV1FeeUSD, evmCallComputeV1ReduceFeeUSD, evmCallComputeV1MapBps);
    }

    // ========================= External =========================
    /// @dev get fee function that can change state. e.g. paying priceFeed
    /// @param _params fee params
    /// @param _dstConfig dst config
    /// @param //_options options
    function getFeeOnSend(
        FeeParams calldata _params,
        IDVN.DstConfig calldata _dstConfig,
        bytes calldata _options
    ) external payable returns (uint256) {
        return getFee(_params, _dstConfig, _options);
    }

    function getFeeOnSend(
        FeeParamsForRead calldata _params,
        IDVN.DstConfig calldata _dstConfig,
        bytes calldata _cmd,
        bytes calldata _options
    ) external payable returns (uint256 fee) {
        fee = getFee(_params, _dstConfig, _cmd, _options);
    }

    // ========================= View =========================
    /// @dev get fee view function
    /// @param _params fee params
    /// @param _dstConfig dst config
    /// @param //_options options
    function getFee(
        FeeParams calldata _params,
        IDVN.DstConfig calldata _dstConfig,
        bytes calldata _options
    ) public view returns (uint256) {
        if (_dstConfig.gas == 0) revert DVN_EidNotSupported(_params.dstEid);

        _decodeDVNOptions(_options); // validate options

        uint256 callDataSize = _getCallDataSize(_params.quorum);
        (uint256 fee, , , uint128 nativePriceUSD) = ILayerZeroPriceFeed(_params.priceFeed).estimateFeeByEid(
            _params.dstEid,
            callDataSize,
            _dstConfig.gas
        );
        return
            _applyPremium(
                fee,
                _dstConfig.multiplierBps,
                _params.defaultMultiplierBps,
                _dstConfig.floorMarginUSD,
                nativePriceUSD
            );
    }

    function getFee(
        FeeParamsForRead calldata _params,
        IDVN.DstConfig calldata _dstConfig,
        bytes calldata _cmd,
        bytes calldata _options
    ) public view returns (uint256) {
        if (_dstConfig.gas == 0) revert DVN_EidNotSupported(localEidV2);

        _decodeDVNOptions(_options); // validate options

        uint256 callDataSize = _getReadCallDataSize(_params.quorum);
        (uint256 fee, , , uint128 nativePriceUSD) = ILayerZeroPriceFeed(_params.priceFeed).estimateFeeByEid(
            localEidV2,
            callDataSize,
            _dstConfig.gas
        );

        // cmdFeeUSD -> cmdFee native final
        uint256 cmdFeeUSD = _estimateCmdFee(_cmd);
        uint256 cmdFee = (cmdFeeUSD * nativeDecimalsRate) / nativePriceUSD;

        return
            _applyPremium(
                fee + cmdFee,
                _dstConfig.multiplierBps,
                _params.defaultMultiplierBps,
                _dstConfig.floorMarginUSD,
                nativePriceUSD
            );
    }

    // ========================= Internal =========================
    function _getCallDataSize(uint256 _quorum) internal pure returns (uint256) {
        return _getCallDataSizeByQuorumAndVerifyBytes(_quorum, VERIFY_BYTES_ULN);
    }

    function _getReadCallDataSize(uint256 _quorum) internal pure returns (uint256) {
        return _getCallDataSizeByQuorumAndVerifyBytes(_quorum, VERIFY_BYTES_CMD_LIB);
    }

    function _getCallDataSizeByQuorumAndVerifyBytes(
        uint256 _quorum,
        uint256 verifyBytes
    ) internal pure returns (uint256) {
        uint256 totalSignatureBytes = _quorum * SIGNATURE_RAW_BYTES;
        if (totalSignatureBytes % 32 != 0) {
            totalSignatureBytes = totalSignatureBytes - (totalSignatureBytes % 32) + 32;
        }
        // getFee should charge on execute(updateHash)
        // totalSignatureBytesPadded also has 32 as size of the bytes
        return uint256(EXECUTE_FIXED_BYTES) + verifyBytes + totalSignatureBytes + 32;
    }

    function _applyPremium(
        uint256 _fee,
        uint16 _bps,
        uint16 _defaultBps,
        uint128 _marginUSD,
        uint128 _nativePriceUSD
    ) internal view returns (uint256) {
        uint16 multiplierBps = _bps == 0 ? _defaultBps : _bps;

        uint256 feeWithMultiplier = (_fee * multiplierBps) / 10000;
        if (_nativePriceUSD == 0 || _marginUSD == 0) {
            return feeWithMultiplier;
        }

        uint256 feeWithFloorMargin = _fee + (_marginUSD * nativeDecimalsRate) / _nativePriceUSD;

        return feeWithFloorMargin > feeWithMultiplier ? feeWithFloorMargin : feeWithMultiplier;
    }

    function _decodeDVNOptions(bytes calldata _options) internal pure returns (uint256) {
        uint256 cursor;
        while (cursor < _options.length) {
            (uint8 optionType, , uint256 newCursor) = _options.nextDVNOption(cursor);
            cursor = newCursor;
            revert DVN_UnsupportedOptionType(optionType);
        }
        if (cursor != _options.length) revert DVNOptions.DVN_InvalidDVNOptions(cursor);

        return 0; // todo: precrime fee model
    }

    function _estimateCmdFee(bytes calldata _cmd) internal view returns (uint256 fee) {
        ReadCmdCodecV1.Cmd memory cmd = ReadCmdCodecV1.decode(_cmd, _assertCmdTypeSupported);
        fee = cmd.numEvmCallRequestV1 * evmCallRequestV1FeeUSD;
        if (cmd.evmCallComputeV1Map) {
            fee += (fee * evmCallComputeV1MapBps) / BPS_BASE;
        }
        if (cmd.evmCallComputeV1Reduce) {
            fee += evmCallComputeV1ReduceFeeUSD;
        }
    }

    function _assertCmdTypeSupported(
        uint32 _targetEid,
        bool _isBlockNum,
        uint64 _blockNumOrTimestamp,
        uint8 _cmdType
    ) internal view {
        supportedCmdTypes.assertSupported(_targetEid, _cmdType);
        if (supportedCmdTypes.isSupported(_targetEid, SupportedCmdTypesLib.CMD_V1__TIMESTAMP_VALIDATE)) {
            BlockTimeConfig memory blockCnf = dstBlockTimeConfigs[_targetEid];
            uint64 timestamp = _blockNumOrTimestamp;
            if (_isBlockNum) {
                // convert the blockNum to the timestamp
                if (_blockNumOrTimestamp > blockCnf.blockNum) {
                    timestamp =
                        blockCnf.timestamp +
                        ((_blockNumOrTimestamp - blockCnf.blockNum) * blockCnf.avgBlockTime) /
                        1000;
                } else {
                    timestamp =
                        blockCnf.timestamp -
                        ((blockCnf.blockNum - _blockNumOrTimestamp) * blockCnf.avgBlockTime) /
                        1000;
                }
            }
            if (
                timestamp + blockCnf.maxPastRetention < block.timestamp ||
                timestamp > block.timestamp + blockCnf.maxFutureRetention
            ) {
                revert DVN_TimestampOutOfRange(_targetEid, timestamp);
            }
        }
    }

    function version() external pure returns (uint64 major, uint8 minor) {
        return (1, 1);
    }

    // send funds here to pay for price feed directly
    receive() external payable {}
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { ECDSA } from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import { EnumerableSet } from "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";

abstract contract MultiSig {
    using EnumerableSet for EnumerableSet.AddressSet;

    enum Errors {
        NoError,
        SignatureError,
        DuplicatedSigner,
        SignerNotInCommittee
    }

    EnumerableSet.AddressSet internal signerSet;
    uint64 public quorum;

    error MultiSig_OnlySigner();
    error MultiSig_QuorumIsZero();
    error MultiSig_SignersSizeIsLessThanQuorum(uint64 signersSize, uint64 quorum);
    error MultiSig_UnorderedSigners();
    error MultiSig_StateAlreadySet(address signer, bool active);
    error MultiSig_StateNotSet(address signer, bool active);
    error MultiSig_InvalidSigner();

    event UpdateSigner(address _signer, bool _active);
    event UpdateQuorum(uint64 _quorum);

    modifier onlySigner() {
        if (!isSigner(msg.sender)) {
            revert MultiSig_OnlySigner();
        }
        _;
    }

    constructor(address[] memory _signers, uint64 _quorum) {
        if (_quorum == 0) {
            revert MultiSig_QuorumIsZero();
        }
        for (uint256 i = 0; i < _signers.length; i++) {
            address signer = _signers[i];
            if (signer == address(0)) {
                revert MultiSig_InvalidSigner();
            }
            signerSet.add(signer);
        }

        uint64 _signerSize = uint64(signerSet.length());
        if (_signerSize < _quorum) {
            revert MultiSig_SignersSizeIsLessThanQuorum(_signerSize, _quorum);
        }

        quorum = _quorum;
    }

    function _setSigner(address _signer, bool _active) internal {
        if (_active) {
            if (_signer == address(0)) {
                revert MultiSig_InvalidSigner();
            }
            if (!signerSet.add(_signer)) {
                revert MultiSig_StateAlreadySet(_signer, _active);
            }
        } else {
            if (!signerSet.remove(_signer)) {
                revert MultiSig_StateNotSet(_signer, _active);
            }
        }

        uint64 _signerSize = uint64(signerSet.length());
        uint64 _quorum = quorum;
        if (_signerSize < _quorum) {
            revert MultiSig_SignersSizeIsLessThanQuorum(_signerSize, _quorum);
        }
        emit UpdateSigner(_signer, _active);
    }

    function _setQuorum(uint64 _quorum) internal {
        if (_quorum == 0) {
            revert MultiSig_QuorumIsZero();
        }
        uint64 _signerSize = uint64(signerSet.length());
        if (_signerSize < _quorum) {
            revert MultiSig_SignersSizeIsLessThanQuorum(_signerSize, _quorum);
        }
        quorum = _quorum;
        emit UpdateQuorum(_quorum);
    }

    function verifySignatures(bytes32 _hash, bytes calldata _signatures) public view returns (bool, Errors) {
        if (_signatures.length != uint256(quorum) * 65) {
            return (false, Errors.SignatureError);
        }

        bytes32 messageDigest = _getEthSignedMessageHash(_hash);

        address lastSigner = address(0); // There cannot be a signer with address 0.
        for (uint256 i = 0; i < quorum; i++) {
            // the quorum is guaranteed not to be zero in the constructor and setter
            bytes calldata signature = _signatures[i * 65:(i + 1) * 65];
            (address currentSigner, ECDSA.RecoverError error) = ECDSA.tryRecover(messageDigest, signature);

            if (error != ECDSA.RecoverError.NoError) return (false, Errors.SignatureError);
            if (currentSigner <= lastSigner) return (false, Errors.DuplicatedSigner); // prevent duplicate signatures, the signers must be ordered to sign the digest
            if (!isSigner(currentSigner)) return (false, Errors.SignerNotInCommittee); // signature is not in committee
            lastSigner = currentSigner;
        }
        return (true, Errors.NoError);
    }

    function _getEthSignedMessageHash(bytes32 _messageHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", _messageHash));
    }

    // ============================================== View ==============================================
    function getSigners() public view returns (address[] memory) {
        return signerSet.values();
    }

    // compatibility with the previous version
    function signers(address _signer) public view returns (bool) {
        return isSigner(_signer);
    }

    function isSigner(address _signer) public view returns (bool) {
        return signerSet.contains(_signer);
    }

    function signerSize() public view returns (uint256) {
        return signerSet.length();
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { BitMap256 } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/BitMaps.sol";

import { ILayerZeroReadDVN } from "../interfaces/ILayerZeroReadDVN.sol";
import { ReadCmdCodecV1 } from "../libs/ReadCmdCodecV1.sol";
import { ReadLib1002 } from "../readlib/ReadLib1002.sol";
import { SupportedCmdTypes } from "../libs/SupportedCmdTypes.sol";

contract SimpleReadDVN is ILayerZeroReadDVN {
    struct SetSupportedCmdTypesParam {
        uint32 targetEid;
        BitMap256 types;
    }

    uint128 internal constant DENOMINATOR = 10 ** 18;
    uint128 internal constant NATIVE_DECIMALS = 10 ** 18;

    uint16 internal constant BPS_BASE = 10000;

    address payable public immutable readLib;

    // the usd fee should be usd * DENOMINATOR
    uint128 internal evmCallRequestV1FeeUSD;
    uint128 internal evmCallComputeV1MapFeeUSD;
    uint128 internal evmCallComputeV1ReduceFeeUSD;

    uint128 internal nativePriceUSD; // usd * DENOMINATOR

    SupportedCmdTypes internal supportedCmdTypes;

    constructor(address payable _readLib) {
        readLib = _readLib;
    }

    function setSupportedCmdTypes(SetSupportedCmdTypesParam[] calldata _params) external {
        for (uint256 i = 0; i < _params.length; i++) {
            supportedCmdTypes.cmdTypes[_params[i].targetEid] = _params[i].types;
        }
    }

    function assignJob(
        address /*_sender*/,
        bytes calldata /*_packetHeader*/,
        bytes calldata _cmd,
        bytes calldata /*_options*/
    ) external payable returns (uint256) {
        uint256 cmdFeeUSD = _estimateCmdFee(_cmd);
        uint256 cmdFee = (cmdFeeUSD * NATIVE_DECIMALS) / nativePriceUSD;

        return cmdFee;
    }

    function verify(bytes calldata _packetHeader, bytes32 _cmdHash, bytes32 _payloadHash) external {
        ReadLib1002(readLib).verify(_packetHeader, _cmdHash, _payloadHash);
    }

    // ========================= View =========================

    function getFee(
        address /*_sender*/,
        bytes calldata /*_packetHeader*/,
        bytes calldata _cmd,
        bytes calldata /*_options*/
    ) external view returns (uint256) {
        // cmdFeeUSD -> cmdFee native
        uint256 cmdFeeUSD = _estimateCmdFee(_cmd);
        uint256 cmdFee = (cmdFeeUSD * NATIVE_DECIMALS) / nativePriceUSD;

        return cmdFee;
    }

    function setCmdFees(
        uint128 _evmCallReqV1FeeUSD,
        uint128 _evmCallComputeV1MapFeeUSD,
        uint128 _evmCallComputeV1ReduceFeeUSD,
        uint128 _nativePriceUSD
    ) external {
        evmCallRequestV1FeeUSD = _evmCallReqV1FeeUSD;
        evmCallComputeV1MapFeeUSD = _evmCallComputeV1MapFeeUSD;
        evmCallComputeV1ReduceFeeUSD = _evmCallComputeV1ReduceFeeUSD;
        nativePriceUSD = _nativePriceUSD;
    }

    function getCmdFees() external view returns (uint128, uint128, uint128, uint128) {
        return (evmCallRequestV1FeeUSD, evmCallComputeV1MapFeeUSD, evmCallComputeV1ReduceFeeUSD, nativePriceUSD);
    }

    function _estimateCmdFee(bytes calldata _cmd) internal view returns (uint256 fee) {
        ReadCmdCodecV1.Cmd memory cmd = ReadCmdCodecV1.decode(_cmd, _assertCmdTypeSupported);
        fee = cmd.numEvmCallRequestV1 * evmCallRequestV1FeeUSD;
        if (cmd.evmCallComputeV1Map) {
            fee += evmCallComputeV1MapFeeUSD * cmd.numEvmCallRequestV1;
        }
        if (cmd.evmCallComputeV1Reduce) {
            fee += evmCallComputeV1ReduceFeeUSD;
        }
    }

    function _assertCmdTypeSupported(
        uint32 _targetEid,
        bool /*_isBlockNum*/,
        uint64 /*_blockNumOrTimestamp*/,
        uint8 _cmdType
    ) internal view {
        supportedCmdTypes.assertSupported(_targetEid, _cmdType);
    }

    receive() external payable virtual {}
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

interface IAxelarDVNAdapter {
    struct MultiplierParam {
        uint32 dstEid;
        uint16 multiplierBps;
    }

    struct FloorMarginUSDParam {
        uint32 dstEid;
        uint128 floorMarginUSD;
    }

    struct NativeGasFeeParam {
        uint32 dstEid;
        uint256 nativeGasFee;
    }

    struct DstConfigParam {
        uint32 eid;
        string chainName;
        string peer;
        uint16 multiplierBps;
        uint256 nativeGasFee;
    }

    struct DstConfig {
        string chainName;
        string peer;
        uint16 multiplierBps;
        uint256 nativeGasFee;
    }

    struct SrcConfig {
        uint32 eid;
        string peer;
    }

    event DstConfigSet(DstConfigParam[] params);
    event NativeGasFeeSet(NativeGasFeeParam[] params);
    event MultiplierSet(MultiplierParam[] params);
    event FloorMarginUSDSet(FloorMarginUSDParam[] params);

    error AxelarDVNAdapter_UntrustedPeer(string chainName, string peer);
    error AxelarDVNAdapter_OnlyWorkerFeeLib();

    function withdrawToFeeLib(address _sendLib) external;
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

import { IAxelarDVNAdapter } from "./IAxelarDVNAdapter.sol";

interface IAxelarDVNAdapterFeeLib {
    struct Param {
        uint32 dstEid;
        uint64 confirmations;
        address sender;
        uint16 defaultMultiplierBps;
    }

    struct DstConfig {
        uint64 gas;
        uint128 floorMarginUSD; // uses priceFeed PRICE_RATIO_DENOMINATOR
    }

    struct DstConfigParam {
        uint32 dstEid;
        uint64 gas;
        uint128 floorMarginUSD; // uses priceFeed PRICE_RATIO_DENOMINATOR
    }

    event DstConfigSet(DstConfigParam[] params);
    event TokenWithdrawn(address token, address to, uint256 amount);
    event GasServiceSet(address gasService);
    event PriceFeedSet(address priceFeed);
    event NativeGasFeeMultiplierBpsSet(uint16 multiplierBps);

    error AxelarDVNAdapter_OptionsUnsupported();
    error AxelarDVNAdapter_InsufficientBalance(uint256 actual, uint256 requested);
    error AxelarDVNAdapter_EidNotSupported(uint32 eid);

    function getFeeOnSend(
        Param calldata _params,
        IAxelarDVNAdapter.DstConfig calldata _dstConfig,
        bytes memory _payload,
        bytes calldata _options,
        address _sendLib
    ) external payable returns (uint256 totalFee);

    function getFee(
        Param calldata _params,
        IAxelarDVNAdapter.DstConfig calldata _dstConfig,
        bytes calldata _options
    ) external view returns (uint256 totalFee);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

interface ICCIPDVNAdapter {
    struct DstConfigParam {
        uint32 eid;
        uint16 multiplierBps;
        uint64 chainSelector;
        uint256 gas;
        bytes peer;
    }

    struct DstConfig {
        // https://docs.chain.link/ccip/supported-networks/v1_2_0/testnet#ethereum-sepolia
        // https://docs.chain.link/ccip/supported-networks/v1_0_0/mainnet
        uint64 chainSelector;
        uint16 multiplierBps;
        // https://github.com/smartcontractkit/ccip/blob/ccip-develop/contracts/src/v0.8/ccip/libraries/Client.sol#L22C51-L22C51
        // for destination is evm chain, need to use `abi.encode(address)` to get the peer
        bytes peer;
        uint256 gas;
    }

    struct SrcConfig {
        uint32 eid;
        bytes peer;
    }

    event DstConfigSet(DstConfigParam[] params);

    error CCIPDVNAdapter_UntrustedPeer(uint64 chainSelector, bytes peer);
    error CCIPDVNAdapter_InvalidRouter(address router);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

import { Client } from "@chainlink/contracts-ccip/src/v0.8/ccip/libraries/Client.sol";
import { IRouterClient } from "@chainlink/contracts-ccip/src/v0.8/ccip/interfaces/IRouterClient.sol";
import { ICCIPDVNAdapter } from "./ICCIPDVNAdapter.sol";

interface ICCIPDVNAdapterFeeLib {
    struct Param {
        uint32 dstEid;
        uint64 confirmations;
        address sender;
        uint16 defaultMultiplierBps;
    }

    struct DstConfig {
        uint128 floorMarginUSD; // uses priceFeed PRICE_RATIO_DENOMINATOR
    }

    struct DstConfigParam {
        uint32 dstEid;
        uint128 floorMarginUSD; // uses priceFeed PRICE_RATIO_DENOMINATOR
    }

    event DstConfigSet(DstConfigParam[] params);

    error CCIPDVNAdapter_OptionsUnsupported();
    error CCIPDVNAdapter_EidNotSupported(uint32 eid);

    function getFeeOnSend(
        Param calldata _params,
        ICCIPDVNAdapter.DstConfig calldata _dstConfig,
        Client.EVM2AnyMessage calldata _message,
        bytes calldata _options,
        IRouterClient _router
    ) external payable returns (uint256 ccipFee, uint256 totalFee);

    function getFee(
        Param calldata _params,
        ICCIPDVNAdapter.DstConfig calldata _dstConfig,
        Client.EVM2AnyMessage calldata _message,
        bytes calldata _options,
        IRouterClient _router
    ) external view returns (uint256 totalFee);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

import { IWorker } from "../../interfaces/IWorker.sol";
import { ILayerZeroDVN } from "./ILayerZeroDVN.sol";
import { ILayerZeroReadDVN } from "./ILayerZeroReadDVN.sol";

interface IDVN is IWorker, ILayerZeroDVN, ILayerZeroReadDVN {
    struct DstConfigParam {
        uint32 dstEid;
        uint64 gas;
        uint16 multiplierBps;
        uint128 floorMarginUSD;
    }

    struct DstConfig {
        uint64 gas;
        uint16 multiplierBps;
        uint128 floorMarginUSD; // uses priceFeed PRICE_RATIO_DENOMINATOR
    }

    event SetDstConfig(DstConfigParam[] params);

    function dstConfig(uint32 _dstEid) external view returns (uint64, uint16, uint128);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

import { IDVN } from "./IDVN.sol";

interface IDVNFeeLib {
    struct FeeParams {
        address priceFeed;
        uint32 dstEid;
        uint64 confirmations;
        address sender;
        uint64 quorum;
        uint16 defaultMultiplierBps;
    }

    struct FeeParamsForRead {
        address priceFeed;
        address sender;
        uint64 quorum;
        uint16 defaultMultiplierBps;
    }

    error DVN_UnsupportedOptionType(uint8 optionType);
    error DVN_EidNotSupported(uint32 eid);
    error DVN_TimestampOutOfRange(uint32 eid, uint64 timestamp);
    error DVN_INVALID_INPUT_LENGTH();

    function getFeeOnSend(
        FeeParams calldata _params,
        IDVN.DstConfig calldata _dstConfig,
        bytes calldata _options
    ) external payable returns (uint256 fee);

    function getFee(
        FeeParams calldata _params,
        IDVN.DstConfig calldata _dstConfig,
        bytes calldata _options
    ) external view returns (uint256 fee);

    function getFeeOnSend(
        FeeParamsForRead calldata _params,
        IDVN.DstConfig calldata _dstConfig,
        bytes calldata _cmd,
        bytes calldata _options
    ) external payable returns (uint256 fee);

    function getFee(
        FeeParamsForRead calldata _params,
        IDVN.DstConfig calldata _dstConfig,
        bytes calldata _cmd,
        bytes calldata _options
    ) external view returns (uint256 fee);

    function version() external view returns (uint64 major, uint8 minor);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

interface ILayerZeroDVN {
    struct AssignJobParam {
        uint32 dstEid;
        bytes packetHeader;
        bytes32 payloadHash;
        uint64 confirmations;
        address sender;
    }

    // @notice query price and assign jobs at the same time
    // @param _dstEid - the destination endpoint identifier
    // @param _packetHeader - version + nonce + path
    // @param _payloadHash - hash of guid + message
    // @param _confirmations - block confirmation delay before relaying blocks
    // @param _sender - the source sending contract address
    // @param _options - options
    function assignJob(AssignJobParam calldata _param, bytes calldata _options) external payable returns (uint256 fee);

    // @notice query the dvn fee for relaying block information to the destination chain
    // @param _dstEid the destination endpoint identifier
    // @param _confirmations - block confirmation delay before relaying blocks
    // @param _sender - the source sending contract address
    // @param _options - options
    function getFee(
        uint32 _dstEid,
        uint64 _confirmations,
        address _sender,
        bytes calldata _options
    ) external view returns (uint256 fee);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

interface ILayerZeroReadDVN {
    // @notice query price and assign jobs at the same time
    // @param _packetHeader - version + nonce + path
    // @param _cmd - the command to be executed to obtain the payload
    // @param _options - options
    function assignJob(
        address _sender,
        bytes calldata _packetHeader,
        bytes calldata _cmd,
        bytes calldata _options
    ) external payable returns (uint256 fee);

    // @notice query the dvn fee for relaying block information to the destination chain
    // @param _packetHeader - version + nonce + path
    // @param _cmd - the command to be executed to obtain the payload
    // @param _options - options
    function getFee(
        address _sender,
        bytes calldata _packetHeader,
        bytes calldata _cmd,
        bytes calldata _options
    ) external view returns (uint256 fee);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0;

/// @dev should be implemented by the ReceiveUln302 contract and future ReceiveUln contracts on EndpointV2
interface IReceiveUlnE2 {
    /// @notice for each dvn to verify the payload
    /// @dev this function signature 0x0223536e
    function verify(bytes calldata _packetHeader, bytes32 _payloadHash, uint64 _confirmations) external;

    /// @notice verify the payload at endpoint, will check if all DVNs verified
    function commitVerification(bytes calldata _packetHeader, bytes32 _payloadHash) external;
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { BytesLib } from "solidity-bytes-utils/contracts/BytesLib.sol";

import { BitMap256 } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/BitMaps.sol";
import { CalldataBytesLib } from "@layerzerolabs/lz-evm-protocol-v2/contracts/libs/CalldataBytesLib.sol";

library DVNOptions {
    using CalldataBytesLib for bytes;
    using BytesLib for bytes;

    uint8 internal constant WORKER_ID = 2;
    uint8 internal constant OPTION_TYPE_PRECRIME = 1;

    error DVN_InvalidDVNIdx();
    error DVN_InvalidDVNOptions(uint256 cursor);

    /// @dev group dvn options by its idx
    /// @param _options [dvn_id][dvn_option][dvn_id][dvn_option]...
    ///        dvn_option = [option_size][dvn_idx][option_type][option]
    ///        option_size = len(dvn_idx) + len(option_type) + len(option)
    ///        dvn_id: uint8, dvn_idx: uint8, option_size: uint16, option_type: uint8, option: bytes
    /// @return dvnOptions the grouped options, still share the same format of _options
    /// @return dvnIndices the dvn indices
    function groupDVNOptionsByIdx(
        bytes memory _options
    ) internal pure returns (bytes[] memory dvnOptions, uint8[] memory dvnIndices) {
        if (_options.length == 0) return (dvnOptions, dvnIndices);

        uint8 numDVNs = getNumDVNs(_options);

        // if there is only 1 dvn, we can just return the whole options
        if (numDVNs == 1) {
            dvnOptions = new bytes[](1);
            dvnOptions[0] = _options;

            dvnIndices = new uint8[](1);
            dvnIndices[0] = _options.toUint8(3); // dvn idx
            return (dvnOptions, dvnIndices);
        }

        // otherwise, we need to group the options by dvn_idx
        dvnIndices = new uint8[](numDVNs);
        dvnOptions = new bytes[](numDVNs);
        unchecked {
            uint256 cursor = 0;
            uint256 start = 0;
            uint8 lastDVNIdx = 255; // 255 is an invalid dvn_idx

            while (cursor < _options.length) {
                ++cursor; // skip worker_id

                // optionLength asserted in getNumDVNs (skip check)
                uint16 optionLength = _options.toUint16(cursor);
                cursor += 2;

                // dvnIdx asserted in getNumDVNs (skip check)
                uint8 dvnIdx = _options.toUint8(cursor);

                // dvnIdx must equal to the lastDVNIdx for the first option
                // so it is always skipped in the first option
                // this operation slices out options whenever the scan finds a different lastDVNIdx
                if (lastDVNIdx == 255) {
                    lastDVNIdx = dvnIdx;
                } else if (dvnIdx != lastDVNIdx) {
                    uint256 len = cursor - start - 3; // 3 is for worker_id and option_length
                    bytes memory opt = _options.slice(start, len);
                    _insertDVNOptions(dvnOptions, dvnIndices, lastDVNIdx, opt);

                    // reset the start and lastDVNIdx
                    start += len;
                    lastDVNIdx = dvnIdx;
                }

                cursor += optionLength;
            }

            // skip check the cursor here because the cursor is asserted in getNumDVNs
            // if we have reached the end of the options, we need to process the last dvn
            uint256 size = cursor - start;
            bytes memory op = _options.slice(start, size);
            _insertDVNOptions(dvnOptions, dvnIndices, lastDVNIdx, op);

            // revert dvnIndices to start from 0
            for (uint8 i = 0; i < numDVNs; ++i) {
                --dvnIndices[i];
            }
        }
    }

    function _insertDVNOptions(
        bytes[] memory _dvnOptions,
        uint8[] memory _dvnIndices,
        uint8 _dvnIdx,
        bytes memory _newOptions
    ) internal pure {
        // dvnIdx starts from 0 but default value of dvnIndices is 0,
        // so we tell if the slot is empty by adding 1 to dvnIdx
        if (_dvnIdx == 255) revert DVN_InvalidDVNIdx();
        uint8 dvnIdxAdj = _dvnIdx + 1;

        for (uint256 j = 0; j < _dvnIndices.length; ++j) {
            uint8 index = _dvnIndices[j];
            if (dvnIdxAdj == index) {
                _dvnOptions[j] = abi.encodePacked(_dvnOptions[j], _newOptions);
                break;
            } else if (index == 0) {
                // empty slot, that means it is the first time we see this dvn
                _dvnIndices[j] = dvnIdxAdj;
                _dvnOptions[j] = _newOptions;
                break;
            }
        }
    }

    /// @dev get the number of unique dvns
    /// @param _options the format is the same as groupDVNOptionsByIdx
    function getNumDVNs(bytes memory _options) internal pure returns (uint8 numDVNs) {
        uint256 cursor = 0;
        BitMap256 bitmap;

        // find number of unique dvn_idx
        unchecked {
            while (cursor < _options.length) {
                ++cursor; // skip worker_id

                uint16 optionLength = _options.toUint16(cursor);
                cursor += 2;
                if (optionLength < 2) revert DVN_InvalidDVNOptions(cursor); // at least 1 byte for dvn_idx and 1 byte for option_type

                uint8 dvnIdx = _options.toUint8(cursor);

                // if dvnIdx is not set, increment numDVNs
                // max num of dvns is 255, 255 is an invalid dvn_idx
                // The order of the dvnIdx is not required to be sequential, as enforcing the order may weaken
                // the composability of the options. e.g. if we refrain from enforcing the order, an OApp that has
                // already enforced certain options can append additional options to the end of the enforced
                // ones without restrictions.
                if (dvnIdx == 255) revert DVN_InvalidDVNIdx();
                if (!bitmap.get(dvnIdx)) {
                    ++numDVNs;
                    bitmap = bitmap.set(dvnIdx);
                }

                cursor += optionLength;
            }
        }
        if (cursor != _options.length) revert DVN_InvalidDVNOptions(cursor);
    }

    /// @dev decode the next dvn option from _options starting from the specified cursor
    /// @param _options the format is the same as groupDVNOptionsByIdx
    /// @param _cursor the cursor to start decoding
    /// @return optionType the type of the option
    /// @return option the option
    /// @return cursor the cursor to start decoding the next option
    function nextDVNOption(
        bytes calldata _options,
        uint256 _cursor
    ) internal pure returns (uint8 optionType, bytes calldata option, uint256 cursor) {
        unchecked {
            // skip worker id
            cursor = _cursor + 1;

            // read option size
            uint16 size = _options.toU16(cursor);
            cursor += 2;

            // read option type
            optionType = _options.toU8(cursor + 1); // skip dvn_idx

            // startCursor and endCursor are used to slice the option from _options
            uint256 startCursor = cursor + 2; // skip option type and dvn_idx
            uint256 endCursor = cursor + size;
            option = _options[startCursor:endCursor];
            cursor += size;
        }
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { SupportedCmdTypes, SupportedCmdTypesLib } from "./SupportedCmdTypes.sol";

library ReadCmdCodecV1 {
    uint16 internal constant CMD_VERSION = 1;
    uint8 internal constant REQUEST_VERSION = 1;
    uint16 internal constant RESOLVER_TYPE_SINGLE_VIEW_EVM_CALL = 1;
    uint8 internal constant COMPUTE_VERSION = 1;
    uint16 internal constant COMPUTE_TYPE_SINGLE_VIEW_EVM_CALL = 1;

    uint8 internal constant COMPUTE_SETTING_MAP_ONLY = 0;
    uint8 internal constant COMPUTE_SETTING_REDUCE_ONLY = 1;
    uint8 internal constant COMPUTE_SETTING_MAP_AND_REDUCE = 2;

    error InvalidCmd();
    error InvalidVersion();
    error InvalidType();

    struct Cmd {
        uint16 numEvmCallRequestV1;
        bool evmCallComputeV1Map;
        bool evmCallComputeV1Reduce;
    }

    function decode(
        bytes calldata _cmd,
        function(uint32, bool, uint64, uint8) view _assertCmdTypeSupported
    ) internal view returns (Cmd memory cmd) {
        uint256 cursor = 0;
        // decode the header in scope, depress stack too deep
        {
            uint16 cmdVersion = uint16(bytes2(_cmd[cursor:cursor + 2]));
            cursor += 2;
            if (cmdVersion != CMD_VERSION) revert InvalidVersion();

            cursor += 2; // skip appCmdLabel

            uint16 requestCount = uint16(bytes2(_cmd[cursor:cursor + 2]));
            cursor += 2;

            // there is only one request type in this version, so total request count should be the same as numEvmCallRequestV1
            if (requestCount == 0) revert InvalidCmd();
            cmd.numEvmCallRequestV1 = requestCount;
        }

        // decode the requests
        for (uint16 i = 0; i < cmd.numEvmCallRequestV1; i++) {
            uint8 requestVersion = uint8(_cmd[cursor]);
            cursor += 1;
            if (requestVersion != REQUEST_VERSION) revert InvalidVersion();

            // skip appRequestLabel
            cursor += 2;

            uint16 resolverType = uint16(bytes2(_cmd[cursor:cursor + 2]));
            cursor += 2;

            if (resolverType == RESOLVER_TYPE_SINGLE_VIEW_EVM_CALL) {
                uint16 requestSize = uint16(bytes2(_cmd[cursor:cursor + 2]));
                cursor += 2;

                // decode the request in scope, depress stack too deep
                {
                    uint256 requestCursor = cursor;
                    uint32 targetEid = uint32(bytes4(_cmd[requestCursor:requestCursor + 4]));
                    requestCursor += 4;

                    bool isBlockNum = uint8(_cmd[requestCursor]) == 1;
                    requestCursor += 1;

                    uint64 blockNumOrTimestamp = uint64(bytes8(_cmd[requestCursor:requestCursor + 8]));

                    _assertCmdTypeSupported(
                        targetEid,
                        isBlockNum,
                        blockNumOrTimestamp,
                        SupportedCmdTypesLib.CMD_V1__REQUEST_V1__EVM_CALL
                    );
                }

                if (cursor + requestSize > _cmd.length) revert InvalidCmd();
                cursor += requestSize;
            } else {
                revert InvalidType();
            }
        }

        // decode the compute if it exists
        if (cursor < _cmd.length) {
            uint8 computeVersion = uint8(_cmd[cursor]);
            cursor += 1;
            if (computeVersion != COMPUTE_VERSION) revert InvalidVersion();

            uint16 computeType = uint16(bytes2(_cmd[cursor:cursor + 2]));
            cursor += 2;
            if (computeType != COMPUTE_TYPE_SINGLE_VIEW_EVM_CALL) revert InvalidType();

            uint8 computeSetting = uint8(_cmd[cursor]);
            cursor += 1;

            if (computeSetting == COMPUTE_SETTING_MAP_ONLY) {
                cmd.evmCallComputeV1Map = true;
            } else if (computeSetting == COMPUTE_SETTING_REDUCE_ONLY) {
                cmd.evmCallComputeV1Reduce = true;
            } else if (computeSetting == COMPUTE_SETTING_MAP_AND_REDUCE) {
                cmd.evmCallComputeV1Map = true;
                cmd.evmCallComputeV1Reduce = true;
            } else {
                revert InvalidType();
            }

            uint32 targetEid = uint32(bytes4(_cmd[cursor:cursor + 4]));
            cursor += 4;

            bool isBlockNum = uint8(_cmd[cursor]) == 1;
            cursor += 1;

            uint64 blockNumOrTimestamp = uint64(bytes8(_cmd[cursor:cursor + 8]));
            cursor += 8;

            _assertCmdTypeSupported(
                targetEid,
                isBlockNum,
                blockNumOrTimestamp,
                SupportedCmdTypesLib.CMD_V1__COMPUTE_V1__EVM_CALL
            );

            // assert the remaining length: confirmations(2), to(20)
            cursor += 22;
        }
        if (cursor != _cmd.length) revert InvalidCmd();
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.20;

import { BitMap256 } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/BitMaps.sol";

struct SupportedCmdTypes {
    mapping(uint32 => BitMap256) cmdTypes; // support options
}

using SupportedCmdTypesLib for SupportedCmdTypes global;

library SupportedCmdTypesLib {
    // the max number of supported command types is 256
    uint8 internal constant CMD_V1__REQUEST_V1__EVM_CALL = 0;
    uint8 internal constant CMD_V1__COMPUTE_V1__EVM_CALL = 1;
    uint8 internal constant CMD_V1__TIMESTAMP_VALIDATE = 2; // validate timestamp, to check if the timestamp is out of range
    // more types can be added here in the future

    error UnsupportedTargetEid();

    function assertSupported(SupportedCmdTypes storage _self, uint32 _targetEid, uint8 _type) internal view {
        if (!isSupported(_self, _targetEid, _type)) revert UnsupportedTargetEid();
    }

    function isSupported(SupportedCmdTypes storage _self, uint32 _targetEid, uint8 _type) internal view returns (bool) {
        return _self.cmdTypes[_targetEid].get(_type);
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { SafeCast } from "@openzeppelin/contracts/utils/math/SafeCast.sol";

import { ExecutorOptions } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/ExecutorOptions.sol";

import { DVNOptions } from "./DVNOptions.sol";

library UlnOptions {
    using SafeCast for uint256;

    uint16 internal constant TYPE_1 = 1; // legacy options type 1
    uint16 internal constant TYPE_2 = 2; // legacy options type 2
    uint16 internal constant TYPE_3 = 3;

    error LZ_ULN_InvalidWorkerOptions(uint256 cursor);
    error LZ_ULN_InvalidWorkerId(uint8 workerId);
    error LZ_ULN_InvalidLegacyType1Option();
    error LZ_ULN_InvalidLegacyType2Option();
    error LZ_ULN_UnsupportedOptionType(uint16 optionType);

    /// @dev decode the options into executorOptions and dvnOptions
    /// @param _options the options can be either legacy options (type 1 or 2) or type 3 options
    /// @return executorOptions the executor options, share the same format of type 3 options
    /// @return dvnOptions the dvn options, share the same format of type 3 options
    function decode(
        bytes calldata _options
    ) internal pure returns (bytes memory executorOptions, bytes memory dvnOptions) {
        // at least 2 bytes for the option type, but can have no options
        if (_options.length < 2) revert LZ_ULN_InvalidWorkerOptions(0);

        uint16 optionsType = uint16(bytes2(_options[0:2]));
        uint256 cursor = 2;

        // type3 options: [worker_option][worker_option]...
        // worker_option: [worker_id][option_size][option]
        // worker_id: uint8, option_size: uint16, option: bytes
        if (optionsType == TYPE_3) {
            unchecked {
                uint256 start = cursor;
                uint8 lastWorkerId; // worker_id starts from 1, so 0 is an invalid worker_id

                // heuristic: we assume that the options are mostly EXECUTOR options only
                // checking the workerID can reduce gas usage for most cases
                while (cursor < _options.length) {
                    uint8 workerId = uint8(bytes1(_options[cursor:cursor + 1]));
                    if (workerId == 0) revert LZ_ULN_InvalidWorkerId(0);

                    // workerId must equal to the lastWorkerId for the first option
                    // so it is always skipped in the first option
                    // this operation slices out options whenever the the scan finds a different workerId
                    if (lastWorkerId == 0) {
                        lastWorkerId = workerId;
                    } else if (workerId != lastWorkerId) {
                        bytes calldata op = _options[start:cursor]; // slice out the last worker's options
                        (executorOptions, dvnOptions) = _insertWorkerOptions(
                            executorOptions,
                            dvnOptions,
                            lastWorkerId,
                            op
                        );

                        // reset the start cursor and lastWorkerId
                        start = cursor;
                        lastWorkerId = workerId;
                    }

                    ++cursor; // for workerId

                    uint16 size = uint16(bytes2(_options[cursor:cursor + 2]));
                    if (size == 0) revert LZ_ULN_InvalidWorkerOptions(cursor);
                    cursor += size + 2;
                }

                // the options length must be the same as the cursor at the end
                if (cursor != _options.length) revert LZ_ULN_InvalidWorkerOptions(cursor);

                // if we have reached the end of the options and the options are not empty
                // we need to process the last worker's options
                if (_options.length > 2) {
                    bytes calldata op = _options[start:cursor];
                    (executorOptions, dvnOptions) = _insertWorkerOptions(executorOptions, dvnOptions, lastWorkerId, op);
                }
            }
        } else {
            executorOptions = decodeLegacyOptions(optionsType, _options);
        }
    }

    function _insertWorkerOptions(
        bytes memory _executorOptions,
        bytes memory _dvnOptions,
        uint8 _workerId,
        bytes calldata _newOptions
    ) private pure returns (bytes memory, bytes memory) {
        if (_workerId == ExecutorOptions.WORKER_ID) {
            _executorOptions = _executorOptions.length == 0
                ? _newOptions
                : abi.encodePacked(_executorOptions, _newOptions);
        } else if (_workerId == DVNOptions.WORKER_ID) {
            _dvnOptions = _dvnOptions.length == 0 ? _newOptions : abi.encodePacked(_dvnOptions, _newOptions);
        } else {
            revert LZ_ULN_InvalidWorkerId(_workerId);
        }
        return (_executorOptions, _dvnOptions);
    }

    /// @dev decode the legacy options (type 1 or 2) into executorOptions
    /// @param _optionType the legacy option type
    /// @param _options the legacy options, which still has the option type in the first 2 bytes
    /// @return executorOptions the executor options, share the same format of type 3 options
    /// Data format:
    /// legacy type 1: [extraGas]
    /// legacy type 2: [extraGas][dstNativeAmt][dstNativeAddress]
    /// extraGas: uint256, dstNativeAmt: uint256, dstNativeAddress: bytes
    function decodeLegacyOptions(
        uint16 _optionType,
        bytes calldata _options
    ) internal pure returns (bytes memory executorOptions) {
        if (_optionType == TYPE_1) {
            if (_options.length != 34) revert LZ_ULN_InvalidLegacyType1Option();

            // execution gas
            uint128 executionGas = uint256(bytes32(_options[2:2 + 32])).toUint128();

            // dont use the encode function in the ExecutorOptions lib for saving gas by calling abi.encodePacked once
            // the result is a lzReceive option: [executor_id][option_size][option_type][execution_gas]
            // option_type: uint8, execution_gas: uint128
            // option_size = len(option_type) + len(execution_gas) = 1 + 16 = 17
            executorOptions = abi.encodePacked(
                ExecutorOptions.WORKER_ID,
                uint16(17), // 16 + 1, 16 for option_length, + 1 for option_type
                ExecutorOptions.OPTION_TYPE_LZRECEIVE,
                executionGas
            );
        } else if (_optionType == TYPE_2) {
            // receiver size <= 32
            if (_options.length <= 66 || _options.length > 98) revert LZ_ULN_InvalidLegacyType2Option();

            // execution gas
            uint128 executionGas = uint256(bytes32(_options[2:2 + 32])).toUint128();

            // nativeDrop (amount + receiver)
            uint128 amount = uint256(bytes32(_options[34:34 + 32])).toUint128(); // offset 2 + 32
            bytes32 receiver;
            unchecked {
                uint256 receiverLen = _options.length - 66; // offset 2 + 32 + 32
                receiver = bytes32(_options[66:]);
                receiver = receiver >> (8 * (32 - receiverLen)); // padding 0 to the left
            }

            // dont use the encode function in the ExecutorOptions lib for saving gas by calling abi.encodePacked once
            // the result has one lzReceive option and one nativeDrop option:
            //      [executor_id][lzReceive_option_size][option_type][execution_gas] +
            //      [executor_id][nativeDrop_option_size][option_type][nativeDrop_amount][receiver]
            // option_type: uint8, execution_gas: uint128, nativeDrop_amount: uint128, receiver: bytes32
            // lzReceive_option_size = len(option_type) + len(execution_gas) = 1 + 16 = 17
            // nativeDrop_option_size = len(option_type) + len(nativeDrop_amount) + len(receiver) = 1 + 16 + 32 = 49
            executorOptions = abi.encodePacked(
                ExecutorOptions.WORKER_ID,
                uint16(17), // 16 + 1, 16 for option_length, + 1 for option_type
                ExecutorOptions.OPTION_TYPE_LZRECEIVE,
                executionGas,
                ExecutorOptions.WORKER_ID,
                uint16(49), // 48 + 1, 32 + 16 for option_length, + 1 for option_type
                ExecutorOptions.OPTION_TYPE_NATIVE_DROP,
                amount,
                receiver
            );
        } else {
            revert LZ_ULN_UnsupportedOptionType(_optionType);
        }
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { ERC165, IERC165 } from "@openzeppelin/contracts/utils/introspection/ERC165.sol";

import { ILayerZeroEndpointV2, MessagingFee, Origin } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol";
import { IMessageLib, MessageLibType, SetConfigParam } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/IMessageLib.sol";
import { ISendLib, Packet } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ISendLib.sol";
import { PacketV1Codec } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/PacketV1Codec.sol";
import { Transfer } from "@layerzerolabs/lz-evm-protocol-v2/contracts/libs/Transfer.sol";
import { AddressCast } from "@layerzerolabs/lz-evm-protocol-v2/contracts/libs/AddressCast.sol";

import { ILayerZeroReadExecutor } from "../../interfaces/ILayerZeroReadExecutor.sol";
import { ILayerZeroReadDVN } from "../interfaces/ILayerZeroReadDVN.sol";
import { ILayerZeroTreasury } from "../../interfaces/ILayerZeroTreasury.sol";

import { UlnOptions } from "../libs/UlnOptions.sol";
import { DVNOptions } from "../libs/DVNOptions.sol";
import { SafeCall } from "../../libs/SafeCall.sol";

import { MessageLibBase } from "../../MessageLibBase.sol";
import { ReadLibBase, ReadLibConfig } from "./ReadLibBase.sol";

contract ReadLib1002 is ISendLib, ERC165, ReadLibBase, MessageLibBase {
    using PacketV1Codec for bytes;
    using SafeCall for address;

    uint32 internal constant CONFIG_TYPE_READ_LID_CONFIG = 1;

    uint16 internal constant TREASURY_MAX_COPY = 32;

    uint256 internal immutable treasuryGasLimit;

    mapping(address oapp => mapping(uint32 eid => mapping(uint64 nonce => bytes32 cmdHash))) public cmdHashLookup;
    mapping(bytes32 headerHash => mapping(bytes32 cmdHash => mapping(address dvn => bytes32 payloadHash)))
        public hashLookup;

    // accumulated fees for workers and treasury
    mapping(address worker => uint256 fee) public fees;
    uint256 internal treasuryNativeFeeCap;
    address internal treasury;

    event PayloadVerified(address dvn, bytes header, bytes32 cmdHash, bytes32 payloadHash);
    event ExecutorFeePaid(address executor, uint256 fee);
    event DVNFeePaid(address[] requiredDVNs, address[] optionalDVNs, uint256[] fees);
    event NativeFeeWithdrawn(address worker, address receiver, uint256 amount);
    event LzTokenFeeWithdrawn(address lzToken, address receiver, uint256 amount);
    event TreasurySet(address treasury);
    event TreasuryNativeFeeCapSet(uint256 newTreasuryNativeFeeCap);

    error LZ_RL_InvalidReceiver();
    error LZ_RL_InvalidPacketHeader();
    error LZ_RL_InvalidCmdHash();
    error LZ_RL_InvalidPacketVersion();
    error LZ_RL_InvalidEid();
    error LZ_RL_Verifying();
    error LZ_RL_InvalidConfigType(uint32 configType);
    error LZ_RL_InvalidAmount(uint256 requested, uint256 available);
    error LZ_RL_NotTreasury();
    error LZ_RL_CannotWithdrawAltToken();

    constructor(
        address _endpoint,
        uint256 _treasuryGasLimit,
        uint256 _treasuryGasForFeeCap
    ) MessageLibBase(_endpoint, ILayerZeroEndpointV2(_endpoint).eid()) {
        treasuryGasLimit = _treasuryGasLimit;
        treasuryNativeFeeCap = _treasuryGasForFeeCap;
    }

    function supportsInterface(bytes4 _interfaceId) public view override(ERC165, IERC165) returns (bool) {
        return
            _interfaceId == type(IMessageLib).interfaceId ||
            _interfaceId == type(ISendLib).interfaceId ||
            super.supportsInterface(_interfaceId);
    }

    // ============================ OnlyOwner ===================================

    function setTreasury(address _treasury) external onlyOwner {
        treasury = _treasury;
        emit TreasurySet(_treasury);
    }

    /// @dev the new value can not be greater than the old value, i.e. down only
    function setTreasuryNativeFeeCap(uint256 _newTreasuryNativeFeeCap) external onlyOwner {
        // assert the new value is no greater than the old value
        if (_newTreasuryNativeFeeCap > treasuryNativeFeeCap)
            revert LZ_RL_InvalidAmount(_newTreasuryNativeFeeCap, treasuryNativeFeeCap);
        treasuryNativeFeeCap = _newTreasuryNativeFeeCap;
        emit TreasuryNativeFeeCapSet(_newTreasuryNativeFeeCap);
    }

    // ============================ OnlyEndpoint ===================================

    function send(
        Packet calldata _packet,
        bytes calldata _options,
        bool _payInLzToken
    ) external onlyEndpoint returns (MessagingFee memory, bytes memory) {
        // the receiver must be the same as the sender
        if (AddressCast.toBytes32(_packet.sender) != _packet.receiver) revert LZ_RL_InvalidReceiver();

        // pay worker and treasury
        (bytes memory encodedPacket, uint256 totalNativeFee) = _payWorkers(_packet, _options);
        (uint256 treasuryNativeFee, uint256 lzTokenFee) = _payTreasury(
            _packet.sender,
            _packet.dstEid,
            totalNativeFee,
            _payInLzToken
        );
        totalNativeFee += treasuryNativeFee;

        // store the cmdHash for verification in order to prevent reorg attack
        cmdHashLookup[_packet.sender][_packet.dstEid][_packet.nonce] = keccak256(_packet.message);

        return (MessagingFee(totalNativeFee, lzTokenFee), encodedPacket);
    }

    function setConfig(address _oapp, SetConfigParam[] calldata _params) external onlyEndpoint {
        for (uint256 i = 0; i < _params.length; i++) {
            SetConfigParam calldata param = _params[i];
            _assertSupportedEid(param.eid);
            if (param.configType == CONFIG_TYPE_READ_LID_CONFIG) {
                _setReadLibConfig(param.eid, _oapp, abi.decode(param.config, (ReadLibConfig)));
            } else {
                revert LZ_RL_InvalidConfigType(param.configType);
            }
        }
    }

    // ============================ External ===================================
    /// @dev The verification will be done in the same chain where the packet is sent.
    /// @dev dont need to check endpoint verifiable here to save gas, as it will reverts if not verifiable.
    /// @param _packetHeader - the srcEid should be the localEid and the dstEid should be the channel id.
    ///        The original packet header in PacketSent event should be processed to flip the srcEid and dstEid.
    function commitVerification(bytes calldata _packetHeader, bytes32 _cmdHash, bytes32 _payloadHash) external {
        // assert packet header is of right size 81
        if (_packetHeader.length != 81) revert LZ_RL_InvalidPacketHeader();
        // assert packet header version is the same
        if (_packetHeader.version() != PacketV1Codec.PACKET_VERSION) revert LZ_RL_InvalidPacketVersion();
        // assert the packet is for this endpoint
        if (_packetHeader.dstEid() != localEid) revert LZ_RL_InvalidEid();

        // cache these values to save gas
        address receiver = _packetHeader.receiverB20();
        uint32 srcEid = _packetHeader.srcEid(); // channel id
        uint64 nonce = _packetHeader.nonce();

        // reorg protection. to allow reverification, the cmdHash cant be removed
        if (cmdHashLookup[receiver][srcEid][nonce] != _cmdHash) revert LZ_RL_InvalidCmdHash();

        ReadLibConfig memory config = getReadLibConfig(receiver, srcEid);
        _verifyAndReclaimStorage(config, keccak256(_packetHeader), _cmdHash, _payloadHash);

        // endpoint will revert if nonce <= lazyInboundNonce
        Origin memory origin = Origin(srcEid, _packetHeader.sender(), nonce);
        ILayerZeroEndpointV2(endpoint).verify(origin, receiver, _payloadHash);
    }

    /// @dev DVN verifies the payload with the packet header and command hash
    /// @param _packetHeader - the packet header is needed for event only, which can be conveniently for off-chain to track the packet state.
    function verify(bytes calldata _packetHeader, bytes32 _cmdHash, bytes32 _payloadHash) external {
        hashLookup[keccak256(_packetHeader)][_cmdHash][msg.sender] = _payloadHash;
        emit PayloadVerified(msg.sender, _packetHeader, _cmdHash, _payloadHash);
    }

    function withdrawFee(address _to, uint256 _amount) external {
        uint256 fee = fees[msg.sender];
        if (_amount > fee) revert LZ_RL_InvalidAmount(_amount, fee);
        unchecked {
            fees[msg.sender] = fee - _amount;
        }

        // transfers native if nativeToken == address(0x0)
        address nativeToken = ILayerZeroEndpointV2(endpoint).nativeToken();
        Transfer.nativeOrToken(nativeToken, _to, _amount);
        emit NativeFeeWithdrawn(msg.sender, _to, _amount);
    }

    // ============================ Treasury ===================================

    /// @dev _lzToken is a user-supplied value because lzToken might change in the endpoint before all lzToken can be taken out
    function withdrawLzTokenFee(address _lzToken, address _to, uint256 _amount) external {
        if (msg.sender != treasury) revert LZ_RL_NotTreasury();

        // lz token cannot be the same as the native token
        if (ILayerZeroEndpointV2(endpoint).nativeToken() == _lzToken) revert LZ_RL_CannotWithdrawAltToken();

        Transfer.token(_lzToken, _to, _amount);

        emit LzTokenFeeWithdrawn(_lzToken, _to, _amount);
    }

    // ============================ View ===================================

    function quote(
        Packet calldata _packet,
        bytes calldata _options,
        bool _payInLzToken
    ) external view returns (MessagingFee memory) {
        // split workers options
        (bytes memory executorOptions, bytes memory dvnOptions) = UlnOptions.decode(_options);

        address sender = _packet.sender;
        uint32 dstEid = _packet.dstEid;

        // quote the executor and dvns
        ReadLibConfig memory config = getReadLibConfig(sender, dstEid);
        uint256 nativeFee = _quoteDVNs(
            config,
            sender,
            PacketV1Codec.encodePacketHeader(_packet),
            _packet.message,
            dvnOptions
        );
        nativeFee += ILayerZeroReadExecutor(config.executor).getFee(sender, executorOptions);

        // quote treasury
        (uint256 treasuryNativeFee, uint256 lzTokenFee) = _quoteTreasury(sender, dstEid, nativeFee, _payInLzToken);
        nativeFee += treasuryNativeFee;

        return MessagingFee(nativeFee, lzTokenFee);
    }

    function verifiable(
        ReadLibConfig calldata _config,
        bytes32 _headerHash,
        bytes32 _cmdHash,
        bytes32 _payloadHash
    ) external view returns (bool) {
        return _checkVerifiable(_config, _headerHash, _cmdHash, _payloadHash);
    }

    function getConfig(uint32 _eid, address _oapp, uint32 _configType) external view returns (bytes memory) {
        if (_configType == CONFIG_TYPE_READ_LID_CONFIG) {
            return abi.encode(getReadLibConfig(_oapp, _eid));
        } else {
            revert LZ_RL_InvalidConfigType(_configType);
        }
    }

    function getTreasuryAndNativeFeeCap() external view returns (address, uint256) {
        return (treasury, treasuryNativeFeeCap);
    }

    function isSupportedEid(uint32 _eid) external view returns (bool) {
        return _isSupportedEid(_eid);
    }

    function messageLibType() external pure returns (MessageLibType) {
        return MessageLibType.SendAndReceive;
    }

    function version() external pure returns (uint64 major, uint8 minor, uint8 endpointVersion) {
        return (10, 0, 2);
    }

    // ============================ Internal ===================================

    /// 1/ handle executor
    /// 2/ handle other workers
    function _payWorkers(
        Packet calldata _packet,
        bytes calldata _options
    ) internal returns (bytes memory encodedPacket, uint256 totalNativeFee) {
        // split workers options
        (bytes memory executorOptions, bytes memory dvnOptions) = UlnOptions.decode(_options);

        // handle executor
        ReadLibConfig memory config = getReadLibConfig(_packet.sender, _packet.dstEid);
        totalNativeFee = _payExecutor(config.executor, _packet.sender, executorOptions);

        // handle dvns
        (uint256 dvnFee, bytes memory packetBytes) = _payDVNs(config, _packet, dvnOptions);
        totalNativeFee += dvnFee;

        encodedPacket = packetBytes;
    }

    function _payDVNs(
        ReadLibConfig memory _config,
        Packet calldata _packet,
        bytes memory _options
    ) internal returns (uint256 totalFee, bytes memory encodedPacket) {
        bytes memory packetHeader = PacketV1Codec.encodePacketHeader(_packet);
        bytes memory payload = PacketV1Codec.encodePayload(_packet);

        uint256[] memory dvnFees;
        (totalFee, dvnFees) = _assignDVNJobs(_config, _packet.sender, packetHeader, _packet.message, _options);

        encodedPacket = abi.encodePacked(packetHeader, payload);
        emit DVNFeePaid(_config.requiredDVNs, _config.optionalDVNs, dvnFees);
    }

    function _assignDVNJobs(
        ReadLibConfig memory _config,
        address _sender,
        bytes memory _packetHeader,
        bytes calldata _cmd,
        bytes memory _options
    ) internal returns (uint256 totalFee, uint256[] memory dvnFees) {
        (bytes[] memory optionsArray, uint8[] memory dvnIds) = DVNOptions.groupDVNOptionsByIdx(_options);

        uint8 dvnsLength = _config.requiredDVNCount + _config.optionalDVNCount;
        dvnFees = new uint256[](dvnsLength);
        for (uint8 i = 0; i < dvnsLength; ++i) {
            address dvn = i < _config.requiredDVNCount
                ? _config.requiredDVNs[i]
                : _config.optionalDVNs[i - _config.requiredDVNCount];

            bytes memory options = "";
            for (uint256 j = 0; j < dvnIds.length; ++j) {
                if (dvnIds[j] == i) {
                    options = optionsArray[j];
                    break;
                }
            }

            dvnFees[i] = ILayerZeroReadDVN(dvn).assignJob(_sender, _packetHeader, _cmd, options);
            if (dvnFees[i] > 0) {
                fees[dvn] += dvnFees[i];
                totalFee += dvnFees[i];
            }
        }
    }

    function _quoteDVNs(
        ReadLibConfig memory _config,
        address _sender,
        bytes memory _packetHeader,
        bytes calldata _cmd,
        bytes memory _options
    ) internal view returns (uint256 totalFee) {
        (bytes[] memory optionsArray, uint8[] memory dvnIndices) = DVNOptions.groupDVNOptionsByIdx(_options);

        // here we merge 2 list of dvns into 1 to allocate the indexed dvn options to the right dvn
        uint8 dvnsLength = _config.requiredDVNCount + _config.optionalDVNCount;
        for (uint8 i = 0; i < dvnsLength; ++i) {
            address dvn = i < _config.requiredDVNCount
                ? _config.requiredDVNs[i]
                : _config.optionalDVNs[i - _config.requiredDVNCount];

            bytes memory options = "";
            // it is a double loop here. however, if the list is short, the cost is very acceptable.
            for (uint256 j = 0; j < dvnIndices.length; ++j) {
                if (dvnIndices[j] == i) {
                    options = optionsArray[j];
                    break;
                }
            }
            totalFee += ILayerZeroReadDVN(dvn).getFee(_sender, _packetHeader, _cmd, options);
        }
    }

    function _payTreasury(
        address _sender,
        uint32 _dstEid,
        uint256 _totalNativeFee,
        bool _payInLzToken
    ) internal returns (uint256 treasuryNativeFee, uint256 lzTokenFee) {
        if (treasury != address(0x0)) {
            bytes memory callData = abi.encodeCall(
                ILayerZeroTreasury.payFee,
                (_sender, _dstEid, _totalNativeFee, _payInLzToken)
            );
            (bool success, bytes memory result) = treasury.safeCall(treasuryGasLimit, 0, TREASURY_MAX_COPY, callData);

            (treasuryNativeFee, lzTokenFee) = _parseTreasuryResult(_totalNativeFee, _payInLzToken, success, result);
            // fee should be in lzTokenFee if payInLzToken, otherwise in native
            if (treasuryNativeFee > 0) {
                fees[treasury] += treasuryNativeFee;
            }
        }
    }

    /// @dev this interface should be DoS-free if the user is paying with native. properties
    /// 1/ treasury can return an overly high lzToken fee
    /// 2/ if treasury returns an overly high native fee, it will be capped by maxNativeFee,
    ///    which can be reasoned with the configurations
    /// 3/ the owner can not configure the treasury in a way that force this function to revert
    function _quoteTreasury(
        address _sender,
        uint32 _dstEid,
        uint256 _totalNativeFee,
        bool _payInLzToken
    ) internal view returns (uint256 nativeFee, uint256 lzTokenFee) {
        // treasury must be set, and it has to be a contract
        if (treasury != address(0x0)) {
            bytes memory callData = abi.encodeCall(
                ILayerZeroTreasury.getFee,
                (_sender, _dstEid, _totalNativeFee, _payInLzToken)
            );
            (bool success, bytes memory result) = treasury.safeStaticCall(
                treasuryGasLimit,
                TREASURY_MAX_COPY,
                callData
            );

            return _parseTreasuryResult(_totalNativeFee, _payInLzToken, success, result);
        }
    }

    function _parseTreasuryResult(
        uint256 _totalNativeFee,
        bool _payInLzToken,
        bool _success,
        bytes memory _result
    ) internal view returns (uint256 nativeFee, uint256 lzTokenFee) {
        // failure, charges nothing
        if (!_success || _result.length < TREASURY_MAX_COPY) return (0, 0);

        // parse the result
        uint256 treasureFeeQuote = abi.decode(_result, (uint256));
        if (_payInLzToken) {
            lzTokenFee = treasureFeeQuote;
        } else {
            // pay in native
            // we must prevent high-treasuryFee Dos attack
            // nativeFee = min(treasureFeeQuote, maxNativeFee)
            // opportunistically raise the maxNativeFee to be the same as _totalNativeFee
            // can't use the _totalNativeFee alone because the oapp can use custom workers to force the fee to 0.
            // maxNativeFee = max (_totalNativeFee, treasuryNativeFeeCap)
            uint256 maxNativeFee = _totalNativeFee > treasuryNativeFeeCap ? _totalNativeFee : treasuryNativeFeeCap;

            // min (treasureFeeQuote, nativeFeeCap)
            nativeFee = treasureFeeQuote > maxNativeFee ? maxNativeFee : treasureFeeQuote;
        }
    }

    function _verifyAndReclaimStorage(
        ReadLibConfig memory _config,
        bytes32 _headerHash,
        bytes32 _cmdHash,
        bytes32 _payloadHash
    ) internal {
        if (!_checkVerifiable(_config, _headerHash, _cmdHash, _payloadHash)) {
            revert LZ_RL_Verifying();
        }

        // iterate the required DVNs
        if (_config.requiredDVNCount > 0) {
            for (uint8 i = 0; i < _config.requiredDVNCount; ++i) {
                delete hashLookup[_headerHash][_cmdHash][_config.requiredDVNs[i]];
            }
        }

        // iterate the optional DVNs
        if (_config.optionalDVNCount > 0) {
            for (uint8 i = 0; i < _config.optionalDVNCount; ++i) {
                delete hashLookup[_headerHash][_cmdHash][_config.optionalDVNs[i]];
            }
        }
    }

    /// @dev for verifiable view function
    /// @dev checks if this verification is ready to be committed to the endpoint
    function _checkVerifiable(
        ReadLibConfig memory _config,
        bytes32 _headerHash,
        bytes32 _cmdHash,
        bytes32 _payloadHash
    ) internal view returns (bool) {
        // iterate the required DVNs
        if (_config.requiredDVNCount > 0) {
            for (uint8 i = 0; i < _config.requiredDVNCount; ++i) {
                if (!_verified(_config.requiredDVNs[i], _headerHash, _cmdHash, _payloadHash)) {
                    // return if any of the required DVNs haven't signed
                    return false;
                }
            }
            if (_config.optionalDVNCount == 0) {
                // returns early if all required DVNs have signed and there are no optional DVNs
                return true;
            }
        }

        // then it must require optional validations
        uint8 threshold = _config.optionalDVNThreshold;
        for (uint8 i = 0; i < _config.optionalDVNCount; ++i) {
            if (_verified(_config.optionalDVNs[i], _headerHash, _cmdHash, _payloadHash)) {
                // increment the optional count if the optional DVN has signed
                threshold--;
                if (threshold == 0) {
                    // early return if the optional threshold has hit
                    return true;
                }
            }
        }

        // return false as a catch-all
        return false;
    }

    function _verified(
        address _dvn,
        bytes32 _headerHash,
        bytes32 _cmdHash,
        bytes32 _expectedPayloadHash
    ) internal view returns (bool verified) {
        verified = hashLookup[_headerHash][_cmdHash][_dvn] == _expectedPayloadHash;
    }

    function _payExecutor(
        address _executor,
        address _sender,
        bytes memory _executorOptions
    ) internal returns (uint256 executorFee) {
        executorFee = ILayerZeroReadExecutor(_executor).assignJob(_sender, _executorOptions);
        if (executorFee > 0) {
            fees[_executor] += executorFee;
        }
        emit ExecutorFeePaid(_executor, executorFee);
    }

    receive() external payable {}
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";

struct ReadLibConfig {
    address executor;
    // we store the length of required DVNs and optional DVNs instead of using DVN.length directly to save gas
    uint8 requiredDVNCount; // 0 indicate DEFAULT, NIL_DVN_COUNT indicate NONE (to override the value of default)
    uint8 optionalDVNCount; // 0 indicate DEFAULT, NIL_DVN_COUNT indicate NONE (to override the value of default)
    uint8 optionalDVNThreshold; // (0, optionalDVNCount]
    address[] requiredDVNs; // no duplicates. sorted an an ascending order. allowed overlap with optionalDVNs
    address[] optionalDVNs; // no duplicates. sorted an an ascending order. allowed overlap with requiredDVNs
}

struct SetDefaultReadLibConfigParam {
    uint32 eid;
    ReadLibConfig config;
}

/// @dev includes the utility functions for checking ReadLib states and logics
abstract contract ReadLibBase is Ownable {
    address internal constant DEFAULT_CONFIG = address(0);
    // reserved values for
    uint8 internal constant DEFAULT = 0;
    uint8 internal constant NIL_DVN_COUNT = type(uint8).max;
    // 127 to prevent total number of DVNs (127 * 2) exceeding uint8.max (255)
    // by limiting the total size, it would help constraint the design of DVNOptions
    uint8 private constant MAX_COUNT = (type(uint8).max - 1) / 2;

    mapping(address oapp => mapping(uint32 eid => ReadLibConfig config)) internal readLibConfigs;

    error LZ_RL_Unsorted();
    error LZ_RL_InvalidRequiredDVNCount();
    error LZ_RL_InvalidOptionalDVNCount();
    error LZ_RL_AtLeastOneDVN();
    error LZ_RL_InvalidOptionalDVNThreshold();
    error LZ_RL_UnsupportedEid(uint32 eid);
    error LZ_RL_InvalidExecutor();

    event DefaultReadLibConfigsSet(SetDefaultReadLibConfigParam[] params);
    event ReadLibConfigSet(address oapp, uint32 eid, ReadLibConfig config);

    // ============================ OnlyOwner ===================================

    /// @dev about the DEFAULT ReadLib config
    /// 1) its values are all LITERAL (e.g. 0 is 0). whereas in the oapp ReadLib config, 0 (default value) points to the default ReadLib config
    ///     this design enables the oapp to point to DEFAULT config without explicitly setting the config
    /// 2) its configuration is more restrictive than the oapp ReadLib config that
    ///     a) it must not use NIL value, where NIL is used only by oapps to indicate the LITERAL 0
    ///     b) it must have at least one DVN and executor
    function setDefaultReadLibConfigs(SetDefaultReadLibConfigParam[] calldata _params) external onlyOwner {
        for (uint256 i = 0; i < _params.length; ++i) {
            SetDefaultReadLibConfigParam calldata param = _params[i];

            // 2.a must not use NIL
            if (param.config.requiredDVNCount == NIL_DVN_COUNT) revert LZ_RL_InvalidRequiredDVNCount();
            if (param.config.optionalDVNCount == NIL_DVN_COUNT) revert LZ_RL_InvalidOptionalDVNCount();

            // 2.b must have at least one dvn and executor
            _assertAtLeastOneDVN(param.config);
            if (param.config.executor == address(0x0)) revert LZ_RL_InvalidExecutor();

            _setConfig(DEFAULT_CONFIG, param.eid, param.config);
        }
        emit DefaultReadLibConfigsSet(_params);
    }

    // ============================ View ===================================
    // @dev assuming most oapps use default, we get default as memory and custom as storage to save gas
    function getReadLibConfig(address _oapp, uint32 _remoteEid) public view returns (ReadLibConfig memory rtnConfig) {
        ReadLibConfig storage defaultConfig = readLibConfigs[DEFAULT_CONFIG][_remoteEid];
        ReadLibConfig storage customConfig = readLibConfigs[_oapp][_remoteEid];

        address executor = customConfig.executor;
        rtnConfig.executor = executor != address(0x0) ? executor : defaultConfig.executor;

        if (customConfig.requiredDVNCount == DEFAULT) {
            if (defaultConfig.requiredDVNCount > 0) {
                // copy only if count > 0. save gas
                rtnConfig.requiredDVNs = defaultConfig.requiredDVNs;
                rtnConfig.requiredDVNCount = defaultConfig.requiredDVNCount;
            } // else, do nothing
        } else {
            if (customConfig.requiredDVNCount != NIL_DVN_COUNT) {
                rtnConfig.requiredDVNs = customConfig.requiredDVNs;
                rtnConfig.requiredDVNCount = customConfig.requiredDVNCount;
            } // else, do nothing
        }

        if (customConfig.optionalDVNCount == DEFAULT) {
            if (defaultConfig.optionalDVNCount > 0) {
                // copy only if count > 0. save gas
                rtnConfig.optionalDVNs = defaultConfig.optionalDVNs;
                rtnConfig.optionalDVNCount = defaultConfig.optionalDVNCount;
                rtnConfig.optionalDVNThreshold = defaultConfig.optionalDVNThreshold;
            }
        } else {
            if (customConfig.optionalDVNCount != NIL_DVN_COUNT) {
                rtnConfig.optionalDVNs = customConfig.optionalDVNs;
                rtnConfig.optionalDVNCount = customConfig.optionalDVNCount;
                rtnConfig.optionalDVNThreshold = customConfig.optionalDVNThreshold;
            }
        }

        // the final value must have at least one dvn
        // it is possible that some default config result into 0 dvns
        _assertAtLeastOneDVN(rtnConfig);
    }

    /// @dev Get the readLib config without the default config for the given remoteEid.
    function getAppReadLibConfig(address _oapp, uint32 _remoteEid) external view returns (ReadLibConfig memory) {
        return readLibConfigs[_oapp][_remoteEid];
    }

    // ============================ Internal ===================================
    function _setReadLibConfig(uint32 _remoteEid, address _oapp, ReadLibConfig memory _param) internal {
        _setConfig(_oapp, _remoteEid, _param);

        // get ReadLib config again as a catch all to ensure the config is valid
        getReadLibConfig(_oapp, _remoteEid);
        emit ReadLibConfigSet(_oapp, _remoteEid, _param);
    }

    /// @dev a supported Eid must have a valid default readLib config, which has at least one dvn
    function _isSupportedEid(uint32 _remoteEid) internal view returns (bool) {
        ReadLibConfig storage defaultConfig = readLibConfigs[DEFAULT_CONFIG][_remoteEid];
        return defaultConfig.requiredDVNCount > 0 || defaultConfig.optionalDVNThreshold > 0;
    }

    function _assertSupportedEid(uint32 _remoteEid) internal view {
        if (!_isSupportedEid(_remoteEid)) revert LZ_RL_UnsupportedEid(_remoteEid);
    }

    // ============================ Private ===================================

    function _assertAtLeastOneDVN(ReadLibConfig memory _config) private pure {
        if (_config.requiredDVNCount == 0 && _config.optionalDVNThreshold == 0) revert LZ_RL_AtLeastOneDVN();
    }

    /// @dev this private function is used in both setDefaultReadLibConfigs and setReadLibConfig
    function _setConfig(address _oapp, uint32 _eid, ReadLibConfig memory _param) private {
        // @dev required dvns
        // if dvnCount == NONE, dvns list must be empty
        // if dvnCount == DEFAULT, dvn list must be empty
        // otherwise, dvnList.length == dvnCount and assert the list is valid
        if (_param.requiredDVNCount == NIL_DVN_COUNT || _param.requiredDVNCount == DEFAULT) {
            if (_param.requiredDVNs.length != 0) revert LZ_RL_InvalidRequiredDVNCount();
        } else {
            if (_param.requiredDVNs.length != _param.requiredDVNCount || _param.requiredDVNCount > MAX_COUNT)
                revert LZ_RL_InvalidRequiredDVNCount();
            _assertNoDuplicates(_param.requiredDVNs);
        }

        // @dev optional dvns
        // if optionalDVNCount == NONE, optionalDVNs list must be empty and threshold must be 0
        // if optionalDVNCount == DEFAULT, optionalDVNs list must be empty and threshold must be 0
        // otherwise, optionalDVNs.length == optionalDVNCount, threshold > 0 && threshold <= optionalDVNCount and assert the list is valid

        // example use case: an oapp uses the DEFAULT 'required' but
        //     a) use a custom 1/1 dvn (practically a required dvn), or
        //     b) use a custom 2/3 dvn
        if (_param.optionalDVNCount == NIL_DVN_COUNT || _param.optionalDVNCount == DEFAULT) {
            if (_param.optionalDVNs.length != 0) revert LZ_RL_InvalidOptionalDVNCount();
            if (_param.optionalDVNThreshold != 0) revert LZ_RL_InvalidOptionalDVNThreshold();
        } else {
            if (_param.optionalDVNs.length != _param.optionalDVNCount || _param.optionalDVNCount > MAX_COUNT)
                revert LZ_RL_InvalidOptionalDVNCount();
            if (_param.optionalDVNThreshold == 0 || _param.optionalDVNThreshold > _param.optionalDVNCount)
                revert LZ_RL_InvalidOptionalDVNThreshold();
            _assertNoDuplicates(_param.optionalDVNs);
        }
        // don't assert valid count here, as it needs to be validated along side default config

        readLibConfigs[_oapp][_eid] = _param;
    }

    function _assertNoDuplicates(address[] memory _dvns) private pure {
        address lastDVN = address(0);
        for (uint256 i = 0; i < _dvns.length; i++) {
            address dvn = _dvns[i];
            if (dvn <= lastDVN) revert LZ_RL_Unsorted(); // to ensure no duplicates
            lastDVN = dvn;
        }
    }
}

// SPDX-License-Identifier: LZBL-1.2

pragma solidity ^0.8.20;

import { Pausable } from "@openzeppelin/contracts/security/Pausable.sol";
import { AccessControl } from "@openzeppelin/contracts/access/AccessControl.sol";

import { ISendLib } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ISendLib.sol";
import { Transfer } from "@layerzerolabs/lz-evm-protocol-v2/contracts/libs/Transfer.sol";

import { IWorker } from "./interfaces/IWorker.sol";

abstract contract Worker is AccessControl, Pausable, IWorker {
    bytes32 internal constant MESSAGE_LIB_ROLE = keccak256("MESSAGE_LIB_ROLE");
    bytes32 internal constant ALLOWLIST = keccak256("ALLOWLIST");
    bytes32 internal constant DENYLIST = keccak256("DENYLIST");
    bytes32 internal constant ADMIN_ROLE = keccak256("ADMIN_ROLE");

    address public workerFeeLib;

    uint64 public allowlistSize;
    uint16 public defaultMultiplierBps;
    address public priceFeed;

    mapping(uint32 eid => uint8[] optionTypes) internal supportedOptionTypes;

    // ========================= Constructor =========================

    /// @param _messageLibs array of message lib addresses that are granted the MESSAGE_LIB_ROLE
    /// @param _priceFeed price feed address
    /// @param _defaultMultiplierBps default multiplier for worker fee
    /// @param _roleAdmin address that is granted the DEFAULT_ADMIN_ROLE (can grant and revoke all roles)
    /// @param _admins array of admin addresses that are granted the ADMIN_ROLE
    constructor(
        address[] memory _messageLibs,
        address _priceFeed,
        uint16 _defaultMultiplierBps,
        address _roleAdmin,
        address[] memory _admins
    ) {
        defaultMultiplierBps = _defaultMultiplierBps;
        priceFeed = _priceFeed;

        if (_roleAdmin != address(0x0)) {
            _grantRole(DEFAULT_ADMIN_ROLE, _roleAdmin); // _roleAdmin can grant and revoke all roles
        }

        for (uint256 i = 0; i < _messageLibs.length; ++i) {
            _grantRole(MESSAGE_LIB_ROLE, _messageLibs[i]);
        }

        for (uint256 i = 0; i < _admins.length; ++i) {
            _grantRole(ADMIN_ROLE, _admins[i]);
        }
    }

    // ========================= Modifier =========================

    modifier onlyAcl(address _sender) {
        if (!hasAcl(_sender)) {
            revert Worker_NotAllowed();
        }
        _;
    }

    /// @dev Access control list using allowlist and denylist
    /// @dev 1) if one address is in the denylist -> deny
    /// @dev 2) else if address in the allowlist OR allowlist is empty (allows everyone)-> allow
    /// @dev 3) else deny
    /// @param _sender address to check
    function hasAcl(address _sender) public view returns (bool) {
        if (hasRole(DENYLIST, _sender)) {
            return false;
        } else if (allowlistSize == 0 || hasRole(ALLOWLIST, _sender)) {
            return true;
        } else {
            return false;
        }
    }

    // ========================= OnyDefaultAdmin =========================

    /// @dev flag to pause execution of workers (if used with whenNotPaused modifier)
    /// @param _paused true to pause, false to unpause
    function setPaused(bool _paused) external onlyRole(DEFAULT_ADMIN_ROLE) {
        if (_paused) {
            _pause();
        } else {
            _unpause();
        }
    }

    // ========================= OnlyAdmin =========================

    /// @param _priceFeed price feed address
    function setPriceFeed(address _priceFeed) external onlyRole(ADMIN_ROLE) {
        priceFeed = _priceFeed;
        emit SetPriceFeed(_priceFeed);
    }

    /// @param _workerFeeLib worker fee lib address
    function setWorkerFeeLib(address _workerFeeLib) external onlyRole(ADMIN_ROLE) {
        workerFeeLib = _workerFeeLib;
        emit SetWorkerLib(_workerFeeLib);
    }

    /// @param _multiplierBps default multiplier for worker fee
    function setDefaultMultiplierBps(uint16 _multiplierBps) external onlyRole(ADMIN_ROLE) {
        defaultMultiplierBps = _multiplierBps;
        emit SetDefaultMultiplierBps(_multiplierBps);
    }

    /// @dev supports withdrawing fee from ULN301, ULN302 and more
    /// @param _lib message lib address
    /// @param _to address to withdraw fee to
    /// @param _amount amount to withdraw
    function withdrawFee(address _lib, address _to, uint256 _amount) external onlyRole(ADMIN_ROLE) {
        if (!hasRole(MESSAGE_LIB_ROLE, _lib)) revert Worker_OnlyMessageLib();
        ISendLib(_lib).withdrawFee(_to, _amount);
        emit Withdraw(_lib, _to, _amount);
    }

    /// @dev supports withdrawing token from the contract
    /// @param _token token address
    /// @param _to address to withdraw token to
    /// @param _amount amount to withdraw
    function withdrawToken(address _token, address _to, uint256 _amount) external onlyRole(ADMIN_ROLE) {
        // transfers native if _token is address(0x0)
        Transfer.nativeOrToken(_token, _to, _amount);
    }

    function setSupportedOptionTypes(uint32 _eid, uint8[] calldata _optionTypes) external onlyRole(ADMIN_ROLE) {
        supportedOptionTypes[_eid] = _optionTypes;
    }

    // ========================= View Functions =========================
    function getSupportedOptionTypes(uint32 _eid) external view returns (uint8[] memory) {
        return supportedOptionTypes[_eid];
    }

    // ========================= Internal Functions =========================

    /// @dev overrides AccessControl to allow for counting of allowlistSize
    /// @param _role role to grant
    /// @param _account address to grant role to
    function _grantRole(bytes32 _role, address _account) internal override {
        if (_role == ALLOWLIST && !hasRole(_role, _account)) {
            ++allowlistSize;
        }
        super._grantRole(_role, _account);
    }

    /// @dev overrides AccessControl to allow for counting of allowlistSize
    /// @param _role role to revoke
    /// @param _account address to revoke role from
    function _revokeRole(bytes32 _role, address _account) internal override {
        if (_role == ALLOWLIST && hasRole(_role, _account)) {
            --allowlistSize;
        }
        super._revokeRole(_role, _account);
    }

    /// @dev overrides AccessControl to disable renouncing of roles
    function renounceRole(bytes32 /*role*/, address /*account*/) public pure override {
        revert Worker_RoleRenouncingDisabled();
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

abstract contract Proxied {
    /// @notice to be used by initialisation / postUpgrade function so that only the proxy's admin can execute them
    /// It also allows these functions to be called inside a contructor
    /// even if the contract is meant to be used without proxy
    modifier proxied() {
        address proxyAdminAddress = _proxyAdmin();
        // With hardhat-deploy proxies
        // the proxyAdminAddress is zero only for the implementation contract
        // if the implementation contract want to be used as a standalone/immutable contract
        // it simply has to execute the `proxied` function
        // This ensure the proxyAdminAddress is never zero post deployment
        // And allow you to keep the same code for both proxied contract and immutable contract
        if (proxyAdminAddress == address(0)) {
            // ensure can not be called twice when used outside of proxy : no admin
            // solhint-disable-next-line security/no-inline-assembly
            assembly {
                sstore(
                    0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103,
                    0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
                )
            }
        } else {
            require(msg.sender == proxyAdminAddress);
        }
        _;
    }

    modifier onlyProxyAdmin() {
        require(msg.sender == _proxyAdmin(), "NOT_AUTHORIZED");
        _;
    }

    function _proxyAdmin() internal view returns (address ownerAddress) {
        // solhint-disable-next-line security/no-inline-assembly
        assembly {
            ownerAddress := sload(0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103)
        }
    }
}

// SPDX-License-Identifier: Unlicense
/*
 * @title Solidity Bytes Arrays Utils
 * @author Gonçalo Sá <[email protected]>
 *
 * @dev Bytes tightly packed arrays utility library for ethereum contracts written in Solidity.
 *      The library lets you concatenate, slice and type cast bytes arrays both in memory and storage.
 */
pragma solidity >=0.8.0 <0.9.0;


library BytesLib {
    function concat(
        bytes memory _preBytes,
        bytes memory _postBytes
    )
        internal
        pure
        returns (bytes memory)
    {
        bytes memory tempBytes;

        assembly {
            // Get a location of some free memory and store it in tempBytes as
            // Solidity does for memory variables.
            tempBytes := mload(0x40)

            // Store the length of the first bytes array at the beginning of
            // the memory for tempBytes.
            let length := mload(_preBytes)
            mstore(tempBytes, length)

            // Maintain a memory counter for the current write location in the
            // temp bytes array by adding the 32 bytes for the array length to
            // the starting location.
            let mc := add(tempBytes, 0x20)
            // Stop copying when the memory counter reaches the length of the
            // first bytes array.
            let end := add(mc, length)

            for {
                // Initialize a copy counter to the start of the _preBytes data,
                // 32 bytes into its memory.
                let cc := add(_preBytes, 0x20)
            } lt(mc, end) {
                // Increase both counters by 32 bytes each iteration.
                mc := add(mc, 0x20)
                cc := add(cc, 0x20)
            } {
                // Write the _preBytes data into the tempBytes memory 32 bytes
                // at a time.
                mstore(mc, mload(cc))
            }

            // Add the length of _postBytes to the current length of tempBytes
            // and store it as the new length in the first 32 bytes of the
            // tempBytes memory.
            length := mload(_postBytes)
            mstore(tempBytes, add(length, mload(tempBytes)))

            // Move the memory counter back from a multiple of 0x20 to the
            // actual end of the _preBytes data.
            mc := end
            // Stop copying when the memory counter reaches the new combined
            // length of the arrays.
            end := add(mc, length)

            for {
                let cc := add(_postBytes, 0x20)
            } lt(mc, end) {
                mc := add(mc, 0x20)
                cc := add(cc, 0x20)
            } {
                mstore(mc, mload(cc))
            }

            // Update the free-memory pointer by padding our last write location
            // to 32 bytes: add 31 bytes to the end of tempBytes to move to the
            // next 32 byte block, then round down to the nearest multiple of
            // 32. If the sum of the length of the two arrays is zero then add
            // one before rounding down to leave a blank 32 bytes (the length block with 0).
            mstore(0x40, and(
              add(add(end, iszero(add(length, mload(_preBytes)))), 31),
              not(31) // Round down to the nearest 32 bytes.
            ))
        }

        return tempBytes;
    }

    function concatStorage(bytes storage _preBytes, bytes memory _postBytes) internal {
        assembly {
            // Read the first 32 bytes of _preBytes storage, which is the length
            // of the array. (We don't need to use the offset into the slot
            // because arrays use the entire slot.)
            let fslot := sload(_preBytes.slot)
            // Arrays of 31 bytes or less have an even value in their slot,
            // while longer arrays have an odd value. The actual length is
            // the slot divided by two for odd values, and the lowest order
            // byte divided by two for even values.
            // If the slot is even, bitwise and the slot with 255 and divide by
            // two to get the length. If the slot is odd, bitwise and the slot
            // with -1 and divide by two.
            let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)
            let mlength := mload(_postBytes)
            let newlength := add(slength, mlength)
            // slength can contain both the length and contents of the array
            // if length < 32 bytes so let's prepare for that
            // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage
            switch add(lt(slength, 32), lt(newlength, 32))
            case 2 {
                // Since the new array still fits in the slot, we just need to
                // update the contents of the slot.
                // uint256(bytes_storage) = uint256(bytes_storage) + uint256(bytes_memory) + new_length
                sstore(
                    _preBytes.slot,
                    // all the modifications to the slot are inside this
                    // next block
                    add(
                        // we can just add to the slot contents because the
                        // bytes we want to change are the LSBs
                        fslot,
                        add(
                            mul(
                                div(
                                    // load the bytes from memory
                                    mload(add(_postBytes, 0x20)),
                                    // zero all bytes to the right
                                    exp(0x100, sub(32, mlength))
                                ),
                                // and now shift left the number of bytes to
                                // leave space for the length in the slot
                                exp(0x100, sub(32, newlength))
                            ),
                            // increase length by the double of the memory
                            // bytes length
                            mul(mlength, 2)
                        )
                    )
                )
            }
            case 1 {
                // The stored value fits in the slot, but the combined value
                // will exceed it.
                // get the keccak hash to get the contents of the array
                mstore(0x0, _preBytes.slot)
                let sc := add(keccak256(0x0, 0x20), div(slength, 32))

                // save new length
                sstore(_preBytes.slot, add(mul(newlength, 2), 1))

                // The contents of the _postBytes array start 32 bytes into
                // the structure. Our first read should obtain the `submod`
                // bytes that can fit into the unused space in the last word
                // of the stored array. To get this, we read 32 bytes starting
                // from `submod`, so the data we read overlaps with the array
                // contents by `submod` bytes. Masking the lowest-order
                // `submod` bytes allows us to add that value directly to the
                // stored value.

                let submod := sub(32, slength)
                let mc := add(_postBytes, submod)
                let end := add(_postBytes, mlength)
                let mask := sub(exp(0x100, submod), 1)

                sstore(
                    sc,
                    add(
                        and(
                            fslot,
                            0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00
                        ),
                        and(mload(mc), mask)
                    )
                )

                for {
                    mc := add(mc, 0x20)
                    sc := add(sc, 1)
                } lt(mc, end) {
                    sc := add(sc, 1)
                    mc := add(mc, 0x20)
                } {
                    sstore(sc, mload(mc))
                }

                mask := exp(0x100, sub(mc, end))

                sstore(sc, mul(div(mload(mc), mask), mask))
            }
            default {
                // get the keccak hash to get the contents of the array
                mstore(0x0, _preBytes.slot)
                // Start copying to the last used word of the stored array.
                let sc := add(keccak256(0x0, 0x20), div(slength, 32))

                // save new length
                sstore(_preBytes.slot, add(mul(newlength, 2), 1))

                // Copy over the first `submod` bytes of the new data as in
                // case 1 above.
                let slengthmod := mod(slength, 32)
                let mlengthmod := mod(mlength, 32)
                let submod := sub(32, slengthmod)
                let mc := add(_postBytes, submod)
                let end := add(_postBytes, mlength)
                let mask := sub(exp(0x100, submod), 1)

                sstore(sc, add(sload(sc), and(mload(mc), mask)))

                for {
                    sc := add(sc, 1)
                    mc := add(mc, 0x20)
                } lt(mc, end) {
                    sc := add(sc, 1)
                    mc := add(mc, 0x20)
                } {
                    sstore(sc, mload(mc))
                }

                mask := exp(0x100, sub(mc, end))

                sstore(sc, mul(div(mload(mc), mask), mask))
            }
        }
    }

    function slice(
        bytes memory _bytes,
        uint256 _start,
        uint256 _length
    )
        internal
        pure
        returns (bytes memory)
    {
        require(_length + 31 >= _length, "slice_overflow");
        require(_bytes.length >= _start + _length, "slice_outOfBounds");

        bytes memory tempBytes;

        assembly {
            switch iszero(_length)
            case 0 {
                // Get a location of some free memory and store it in tempBytes as
                // Solidity does for memory variables.
                tempBytes := mload(0x40)

                // The first word of the slice result is potentially a partial
                // word read from the original array. To read it, we calculate
                // the length of that partial word and start copying that many
                // bytes into the array. The first word we copy will start with
                // data we don't care about, but the last `lengthmod` bytes will
                // land at the beginning of the contents of the new array. When
                // we're done copying, we overwrite the full first word with
                // the actual length of the slice.
                let lengthmod := and(_length, 31)

                // The multiplication in the next line is necessary
                // because when slicing multiples of 32 bytes (lengthmod == 0)
                // the following copy loop was copying the origin's length
                // and then ending prematurely not copying everything it should.
                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
                let end := add(mc, _length)

                for {
                    // The multiplication in the next line has the same exact purpose
                    // as the one above.
                    let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)
                } lt(mc, end) {
                    mc := add(mc, 0x20)
                    cc := add(cc, 0x20)
                } {
                    mstore(mc, mload(cc))
                }

                mstore(tempBytes, _length)

                //update free-memory pointer
                //allocating the array padded to 32 bytes like the compiler does now
                mstore(0x40, and(add(mc, 31), not(31)))
            }
            //if we want a zero-length slice let's just return a zero-length array
            default {
                tempBytes := mload(0x40)
                //zero out the 32 bytes slice we are about to return
                //we need to do it because Solidity does not garbage collect
                mstore(tempBytes, 0)

                mstore(0x40, add(tempBytes, 0x20))
            }
        }

        return tempBytes;
    }

    function toAddress(bytes memory _bytes, uint256 _start) internal pure returns (address) {
        require(_bytes.length >= _start + 20, "toAddress_outOfBounds");
        address tempAddress;

        assembly {
            tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000)
        }

        return tempAddress;
    }

    function toUint8(bytes memory _bytes, uint256 _start) internal pure returns (uint8) {
        require(_bytes.length >= _start + 1 , "toUint8_outOfBounds");
        uint8 tempUint;

        assembly {
            tempUint := mload(add(add(_bytes, 0x1), _start))
        }

        return tempUint;
    }

    function toUint16(bytes memory _bytes, uint256 _start) internal pure returns (uint16) {
        require(_bytes.length >= _start + 2, "toUint16_outOfBounds");
        uint16 tempUint;

        assembly {
            tempUint := mload(add(add(_bytes, 0x2), _start))
        }

        return tempUint;
    }

    function toUint32(bytes memory _bytes, uint256 _start) internal pure returns (uint32) {
        require(_bytes.length >= _start + 4, "toUint32_outOfBounds");
        uint32 tempUint;

        assembly {
            tempUint := mload(add(add(_bytes, 0x4), _start))
        }

        return tempUint;
    }

    function toUint64(bytes memory _bytes, uint256 _start) internal pure returns (uint64) {
        require(_bytes.length >= _start + 8, "toUint64_outOfBounds");
        uint64 tempUint;

        assembly {
            tempUint := mload(add(add(_bytes, 0x8), _start))
        }

        return tempUint;
    }

    function toUint96(bytes memory _bytes, uint256 _start) internal pure returns (uint96) {
        require(_bytes.length >= _start + 12, "toUint96_outOfBounds");
        uint96 tempUint;

        assembly {
            tempUint := mload(add(add(_bytes, 0xc), _start))
        }

        return tempUint;
    }

    function toUint128(bytes memory _bytes, uint256 _start) internal pure returns (uint128) {
        require(_bytes.length >= _start + 16, "toUint128_outOfBounds");
        uint128 tempUint;

        assembly {
            tempUint := mload(add(add(_bytes, 0x10), _start))
        }

        return tempUint;
    }

    function toUint256(bytes memory _bytes, uint256 _start) internal pure returns (uint256) {
        require(_bytes.length >= _start + 32, "toUint256_outOfBounds");
        uint256 tempUint;

        assembly {
            tempUint := mload(add(add(_bytes, 0x20), _start))
        }

        return tempUint;
    }

    function toBytes32(bytes memory _bytes, uint256 _start) internal pure returns (bytes32) {
        require(_bytes.length >= _start + 32, "toBytes32_outOfBounds");
        bytes32 tempBytes32;

        assembly {
            tempBytes32 := mload(add(add(_bytes, 0x20), _start))
        }

        return tempBytes32;
    }

    function equal(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bool) {
        bool success = true;

        assembly {
            let length := mload(_preBytes)

            // if lengths don't match the arrays are not equal
            switch eq(length, mload(_postBytes))
            case 1 {
                // cb is a circuit breaker in the for loop since there's
                //  no said feature for inline assembly loops
                // cb = 1 - don't breaker
                // cb = 0 - break
                let cb := 1

                let mc := add(_preBytes, 0x20)
                let end := add(mc, length)

                for {
                    let cc := add(_postBytes, 0x20)
                // the next line is the loop condition:
                // while(uint256(mc < end) + cb == 2)
                } eq(add(lt(mc, end), cb), 2) {
                    mc := add(mc, 0x20)
                    cc := add(cc, 0x20)
                } {
                    // if any of these checks fails then arrays are not equal
                    if iszero(eq(mload(mc), mload(cc))) {
                        // unsuccess:
                        success := 0
                        cb := 0
                    }
                }
            }
            default {
                // unsuccess:
                success := 0
            }
        }

        return success;
    }

    function equalStorage(
        bytes storage _preBytes,
        bytes memory _postBytes
    )
        internal
        view
        returns (bool)
    {
        bool success = true;

        assembly {
            // we know _preBytes_offset is 0
            let fslot := sload(_preBytes.slot)
            // Decode the length of the stored array like in concatStorage().
            let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)
            let mlength := mload(_postBytes)

            // if lengths don't match the arrays are not equal
            switch eq(slength, mlength)
            case 1 {
                // slength can contain both the length and contents of the array
                // if length < 32 bytes so let's prepare for that
                // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage
                if iszero(iszero(slength)) {
                    switch lt(slength, 32)
                    case 1 {
                        // blank the last byte which is the length
                        fslot := mul(div(fslot, 0x100), 0x100)

                        if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) {
                            // unsuccess:
                            success := 0
                        }
                    }
                    default {
                        // cb is a circuit breaker in the for loop since there's
                        //  no said feature for inline assembly loops
                        // cb = 1 - don't breaker
                        // cb = 0 - break
                        let cb := 1

                        // get the keccak hash to get the contents of the array
                        mstore(0x0, _preBytes.slot)
                        let sc := keccak256(0x0, 0x20)

                        let mc := add(_postBytes, 0x20)
                        let end := add(mc, mlength)

                        // the next line is the loop condition:
                        // while(uint256(mc < end) + cb == 2)
                        for {} eq(add(lt(mc, end), cb), 2) {
                            sc := add(sc, 1)
                            mc := add(mc, 0x20)
                        } {
                            if iszero(eq(sload(sc), mload(mc))) {
                                // unsuccess:
                                success := 0
                                cb := 0
                            }
                        }
                    }
                }
            }
            default {
                // unsuccess:
                success := 0
            }
        }

        return success;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 20000
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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MultiSig.Errors","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"vid","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_lib","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdrawFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_lib","type":"address"},{"internalType":"address payable","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdrawFeeFromUlnV2","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdrawToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"workerFeeLib","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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-----Decoded View---------------
Arg [0] : _localEidV2 (uint32): 30255
Arg [1] : _vid (uint32): 255
Arg [2] : _messageLibs (address[]): 0x38dE71124f7a447a01D67945a51eDcE9FF491251,0x282b3386571f7f794450d5789911a9804FA346b4,0x377530cdA84DFb2673bF4d145DCF0C4D7fdcB5b6
Arg [3] : _priceFeed (address): 0x3c2269811836af69497E5F486A85D7316753cf62
Arg [4] : _signers (address[]): 0x23c022223d543ADAdDA3c1c05553b63f1D15aA42,0x2f99B4A409AF38F926e4CC68e5b932B7EFaB5A15,0x9398Fbf6dFfF6A92D5e41F1A997BF84F0203B92B
Arg [5] : _quorum (uint64): 2
Arg [6] : _admins (address[]): 0xB52Fa54FC261398058c3Ac7B8dD442D7d8B9F0B6,0xB8FF877ed78Ba520Ece21B1de7843A8a57cA47Cb

-----Encoded View---------------
18 Constructor Arguments found :
Arg [0] : 000000000000000000000000000000000000000000000000000000000000762f
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000ff
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000e0
Arg [3] : 0000000000000000000000003c2269811836af69497e5f486a85d7316753cf62
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000160
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [6] : 00000000000000000000000000000000000000000000000000000000000001e0
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [8] : 00000000000000000000000038de71124f7a447a01d67945a51edce9ff491251
Arg [9] : 000000000000000000000000282b3386571f7f794450d5789911a9804fa346b4
Arg [10] : 000000000000000000000000377530cda84dfb2673bf4d145dcf0c4d7fdcb5b6
Arg [11] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [12] : 00000000000000000000000023c022223d543adadda3c1c05553b63f1d15aa42
Arg [13] : 0000000000000000000000002f99b4a409af38f926e4cc68e5b932b7efab5a15
Arg [14] : 0000000000000000000000009398fbf6dfff6a92d5e41f1a997bf84f0203b92b
Arg [15] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [16] : 000000000000000000000000b52fa54fc261398058c3ac7b8dd442d7d8b9f0b6
Arg [17] : 000000000000000000000000b8ff877ed78ba520ece21b1de7843a8a57ca47cb

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