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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import "@openzeppelin/contracts/utils/Address.sol";

interface IVRNGRouter {
    function requestRandomNumberWithTraceId(uint256 traceId) external payable returns (uint256 requestId);
}

interface IVRFSystemCallback {
    function randomNumberCallback(uint256 requestId, uint256 randomNumber) external;
}

interface IBurnableERC1155 is IERC1155 {
    function burn(address from, uint256 id, uint256 amount) external;
}

/**
 * @title GeezRaffle - Modified for Dual Entry Mode (Burn OR ERC20) with Auto Winner Selection
 * @dev Raffle system supporting EITHER Geez token burning OR ERC20 payment per raffle
 * 
 * MODIFICATION: Raffles can now be configured to accept EITHER:
 * - Geez Nutz burning (traditional mode)
 * - ERC20 token payment (e.g., Pnutz)
 * The mode is determined by whether paymentToken is set at creation
 * 
 * AUTO WINNER SELECTION: Contract automatically attempts to finalize when raffle becomes full
 */
contract GeezRaffle is Ownable, ReentrancyGuard, IERC721Receiver, IERC1155Receiver, ERC165, IVRFSystemCallback {
    using SafeERC20 for IERC20;
    using Address for address;

    // Custom errors
    error InvalidRaffleId();
    error RaffleCanceledError();
    error RaffleNotOpen();
    error RafflePausedError();
    error RandomnessPending();
    error TokenNotAccepted();
    error InvalidAmount();
    error MaxBurnExceeded();
    error TooManyEntrants();
    error NotReadyToFinalize();
    error UnauthorizedCaller();
    error InvalidState();
    error BadRecipient();
    error WrongEntryMode();

    // Geez Nutz ERC1155
    IBurnableERC1155 public immutable geezToken;
    
    // VRNG Router
    IVRNGRouter public immutable vrngRouter; 
    
    // Constants
    uint256 public constant VRNG_TIMEOUT = 2 hours;
    uint256 public constant DEFAULT_MAX_ENTRANTS = 500;
    uint256 public constant MAX_ENTRANTS_BOUND = 1000;
    uint256 public constant MIN_FINALIZATION_DELAY = 5 minutes;
    uint256 public constant MAX_ACCEPTED_TOKEN_IDS = 8;
    uint256 public constant REFUND_BATCH_SIZE = 50;
    
    uint256 public raffleCounter;
    bool public isSelfBurnAllowed;
    uint256 public vrngFeeWei;
    
    // NEW: Auto-finalization settings
    bool public autoFinalizationEnabled = true;
    uint256 public vrngFeeBuffer; // Extra ETH buffer for VRNG fees

    struct Raffle {
        // Prize info (on-chain NFTs)
        address prizeNFT;
        uint256 prizeTokenId;
        uint256 prizeAmount;
        bool prizeIs1155;
        
        // ERC20 prize support
        bool prizeIsERC20;
        address prizeERC20Token;
        uint256 prizeERC20Amount;
        
        // External prize info
        bool prizeIsExternal;
        bool externalDelivered;
        uint256 externalChainId;
        address externalPrizeCollection;
        address externalCustodian;
        
        // Raffle meta
        address creator;
        uint256 maxBurn; // MODIFIED: Now represents max entries regardless of type
        uint256 burned;   // MODIFIED: Now represents total entries regardless of type
        bool isOpen;
        bool isPaused;
        bool isCanceled;
        bool prizeWithdrawnIfCanceled;
        uint256 maxEntrants;
        uint256 createdAt;
        
        // Entries
        address[] entrants;
        uint256[] acceptedTokenIds; // Only used for burn mode
        uint256[] usedTokenIds;     // Only used for burn mode
        
        // MODIFIED: Entry mode configuration
        address paymentToken;     // If set, use ERC20 mode; if address(0), use burn mode
        uint256 pricePerEntry;    // Price per entry in ERC20 mode
        uint256 proceedsAccrued;  // Total ERC20 collected
        
        // Winner and VRNG state
        address winner;
        bool awaitingRandomness;
        uint256 vrngRequestId;
        uint256 vrngRequestTimestamp;
        
        // Winner selection optimization
        uint256[] cumulativeWeights;
        uint256 totalWeight;
        bool weightsCalculated;
        
        // Storage management
        bool storageCanBePruned;
        uint256 refundProgress;
        bool burnFailed;
        
        // NEW: Auto-finalization tracking
        bool autoFinalized;
    }

    mapping(uint256 => Raffle) public raffles;
    
    // Mappings moved outside struct for gas efficiency
    mapping(uint256 => mapping(address => uint256)) public raffleEntries;
    mapping(uint256 => mapping(uint256 => bool)) public raffleTokenIdAllowed; // Only for burn mode
    mapping(uint256 => mapping(uint256 => bool)) private _tokenIdUsed;        // Only for burn mode
    
    // VRNG request tracking
    mapping(uint256 => uint256) public vrngRequestToRaffle;
    
    // Escrow mappings
    mapping(uint256 => mapping(address => mapping(uint256 => uint256))) private _escrow; // Only for burn mode
    mapping(uint256 => mapping(uint256 => uint256)) private _escrowTotals;              // Only for burn mode
    mapping(uint256 => mapping(address => uint256)) private _erc20Paid;                 // Only for ERC20 mode

    // Anti-griefing protection
    mapping(uint256 => uint256) public lastFinalizationAttempt;

    // Events
    event RaffleCreated(uint256 indexed raffleId, address indexed creator, address indexed prizeNFT, uint256 prizeTokenId, bool prizeIs1155, uint256 prizeAmount, uint256 maxBurn, uint256[] acceptedTokenIds, uint256 maxEntrants);
    event ERC20RaffleCreated(uint256 indexed raffleId, address indexed creator, address indexed prizeToken, uint256 prizeAmount, uint256 maxBurn, uint256[] acceptedTokenIds, uint256 maxEntrants);
    event RaffleEntered(uint256 indexed raffleId, address indexed user, uint256 tokenId, uint256 amount);
    event RaffleEnteredBatch(uint256 indexed raffleId, address indexed user, uint256[] tokenIds, uint256[] amounts);
    event RafflePurchased(uint256 indexed raffleId, address indexed user, address paymentToken, uint256 entries, uint256 cost);
    event RaffleEnteredWithPermit(uint256 indexed raffleId, address indexed user, address paymentToken, uint256 entries, uint256 cost);
    event RaffleWinner(uint256 indexed raffleId, address indexed winner);
    event RafflePaused(uint256 indexed raffleId);
    event RaffleUnpaused(uint256 indexed raffleId);
    event RaffleCanceled(uint256 indexed raffleId, bool autoRefundEnabled);
    event PrizeWithdrawn(uint256 indexed raffleId);
    event RefundIssued(uint256 indexed raffleId, address indexed user, uint256 amount1155);
    event TokenRefundIssued(uint256 indexed raffleId, address indexed user, address token, uint256 amountToken);
    event BatchRefundProcessed(uint256 indexed raffleId, uint256 start, uint256 end, uint256 usersProcessed);
    event RaffleClosed(uint256 indexed raffleId);
    event ExternalPrizeAnnounced(uint256 indexed raffleId, address indexed winner, uint256 externalChainId, address externalPrizeCollection, uint256 prizeTokenId, bool prizeIs1155, uint256 prizeAmount);
    event ExternalPrizeDeliveryMarked(uint256 indexed raffleId, address indexed by, bytes32 externalTxHash);
    event ExternalCustodianUpdated(uint256 indexed raffleId, address indexed newCustodian);
    event VRNGRequested(uint256 indexed raffleId, uint256 indexed requestId, uint256 traceId);
    event VRNGFulfilled(uint256 indexed raffleId, uint256 indexed requestId, uint256 randomNumber);
    event VRNGFeeSet(uint256 feeWei);
    event PaymentConfigSet(uint256 indexed raffleId, address token, uint256 pricePerEntry);
    event ReadyToFinalize(uint256 indexed raffleId);
    event FinalizeRequested(uint256 indexed raffleId, address indexed finalizer);
    event EmergencyCancel(uint256 indexed raffleId);
    event RaffleDeleted(uint256 indexed raffleId, address indexed creator);
    event WeightsCalculated(uint256 indexed raffleId, uint256 totalWeight);
    event StoragePruned(uint256 indexed raffleId, uint256 itemsCleared);
    event ProceedsWithdrawn(uint256 indexed raffleId, address indexed token, address indexed to, uint256 amount);
    event BurnValidationSet(bool isSelfBurnAllowed);
    event GeezSwept(uint256 indexed raffleId, address indexed to, uint256[] tokenIds, uint256[] amounts);
    // NEW: Auto-finalization events
    event AutoFinalizationEnabled(bool enabled);
    event AutoFinalizationAttempted(uint256 indexed raffleId, bool success, string reason);
    event VRNGFeesFunded(address indexed funder, uint256 amount);
    event VRNGFeeBufferSet(uint256 newBuffer);

    constructor(address _geezToken, address _vrngRouter) {
        if (_geezToken == address(0)) revert InvalidState();
        if (_vrngRouter == address(0)) revert InvalidState();
        if (!_geezToken.isContract()) revert InvalidState();
        if (!_vrngRouter.isContract()) revert InvalidState();
        
        geezToken = IBurnableERC1155(_geezToken);
        vrngRouter = IVRNGRouter(_vrngRouter);
        
        _validateBurnInterface();
    }

    function _validateBurnInterface() internal {
        try geezToken.burn(address(this), 0, 0) {
            isSelfBurnAllowed = true;
        } catch {
            isSelfBurnAllowed = false;
        }
        emit BurnValidationSet(isSelfBurnAllowed);
    }

    function setBurnValidation(bool _isSelfBurnAllowed) external onlyOwner {
        isSelfBurnAllowed = _isSelfBurnAllowed;
        emit BurnValidationSet(_isSelfBurnAllowed);
    }

    function setVRNGFee(uint256 feeWei) external onlyOwner {
        vrngFeeWei = feeWei;
        emit VRNGFeeSet(feeWei);
    }

    // NEW: Auto-finalization management functions
    function setAutoFinalization(bool enabled) external onlyOwner {
        autoFinalizationEnabled = enabled;
        emit AutoFinalizationEnabled(enabled);
    }

    function setVRNGFeeBuffer(uint256 buffer) external onlyOwner {
        vrngFeeBuffer = buffer;
        emit VRNGFeeBufferSet(buffer);
    }

    function fundVRNGFees() external payable {
        if (msg.value == 0) revert InvalidAmount();
        emit VRNGFeesFunded(msg.sender, msg.value);
    }

    function withdrawExcessETH(uint256 amount) external onlyOwner {
        if (amount == 0) revert InvalidAmount();
        uint256 contractBalance = address(this).balance;
        uint256 reservedForVRNG = vrngFeeWei + vrngFeeBuffer;
        
        if (contractBalance < reservedForVRNG + amount) revert InvalidAmount();
        
        (bool success, ) = payable(owner()).call{value: amount}("");
        if (!success) revert InvalidState();
    }

    // NEW: Auto-finalization logic
    function _tryAutoFinalize(uint256 raffleId) internal {
        if (!autoFinalizationEnabled) {
            emit ReadyToFinalize(raffleId);
            return;
        }

        Raffle storage r = raffles[raffleId];
        
        // Check if already auto-finalized
        if (r.autoFinalized) return;
        
        // Check basic conditions
        if (!r.isOpen || r.isCanceled || r.awaitingRandomness) {
            emit AutoFinalizationAttempted(raffleId, false, "Invalid state");
            return;
        }

        // Check if we have enough ETH for VRNG fee
        uint256 contractBalance = address(this).balance;
        if (vrngFeeWei > 0 && contractBalance < vrngFeeWei) {
            emit AutoFinalizationAttempted(raffleId, false, "Insufficient VRNG fees");
            emit ReadyToFinalize(raffleId);
            return;
        }

        // Check finalization delay
        uint256 lastAttempt = lastFinalizationAttempt[raffleId];
        if (lastAttempt > 0 && block.timestamp < lastAttempt + MIN_FINALIZATION_DELAY) {
            emit AutoFinalizationAttempted(raffleId, false, "Finalization delay not met");
            return;
        }

        // Mark as auto-finalized to prevent re-entry
        r.autoFinalized = true;
        lastFinalizationAttempt[raffleId] = block.timestamp;

        try this._internalAutoFinalize(raffleId) {
            emit AutoFinalizationAttempted(raffleId, true, "Success");
        } catch Error(string memory reason) {
            r.autoFinalized = false; // Reset flag on failure
            emit AutoFinalizationAttempted(raffleId, false, reason);
            emit ReadyToFinalize(raffleId);
        } catch {
            r.autoFinalized = false; // Reset flag on failure
            emit AutoFinalizationAttempted(raffleId, false, "Unknown error");
            emit ReadyToFinalize(raffleId);
        }
    }

    // NEW: Internal auto-finalization function (external for try/catch)
    function _internalAutoFinalize(uint256 raffleId) external {
        if (msg.sender != address(this)) revert UnauthorizedCaller();
        
        _calculateWeights(raffleId);
        _finalize(raffleId, vrngFeeWei);
        emit FinalizeRequested(raffleId, address(this));
    }

    function _defaultIds() internal pure returns (uint256[] memory ids) {
        ids = new uint256[](2);
        ids[0] = 0;
        ids[1] = 1;
    }

    function randomNumberCallback(uint256 requestId, uint256 randomNumber) external override nonReentrant {
        if (msg.sender != address(vrngRouter)) revert UnauthorizedCaller();
        
        uint256 raffleId = vrngRequestToRaffle[requestId];
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        
        Raffle storage r = raffles[raffleId];
        if (!r.awaitingRandomness) revert InvalidState();
        if (r.vrngRequestId != requestId) revert InvalidState();
        
        r.awaitingRandomness = false;
        delete vrngRequestToRaffle[requestId];
        
        emit VRNGFulfilled(raffleId, requestId, randomNumber);
        _completeFinalization(raffleId, randomNumber);
    }

    function requestWinnerVRNG(uint256 raffleId) external payable nonReentrant {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage r = raffles[raffleId];
        if (!r.isOpen || r.isCanceled || r.awaitingRandomness) revert InvalidState();
        if (r.burned != r.maxBurn || r.entrants.length == 0) revert NotReadyToFinalize();
        
        if (vrngFeeWei > 0 && msg.value != vrngFeeWei) revert InvalidAmount();
        if (vrngFeeWei == 0 && msg.value != 0) revert InvalidAmount();
        
        uint256 lastAttempt = lastFinalizationAttempt[raffleId];
        if (lastAttempt > 0 && block.timestamp < lastAttempt + MIN_FINALIZATION_DELAY) {
            revert InvalidState();
        }
        lastFinalizationAttempt[raffleId] = block.timestamp;
        
        _calculateWeights(raffleId);
        _finalize(raffleId, msg.value);
        emit FinalizeRequested(raffleId, msg.sender);
    }

    // MODIFIED: Now includes payment token option at creation
    function createRaffle(
        address prizeNFT, 
        uint256 prizeTokenId, 
        uint256 maxBurn
    ) external onlyOwner returns (uint256) {
        uint256[] memory defaultTokenIds = _defaultIds();
        return _createRaffleERC721(prizeNFT, prizeTokenId, maxBurn, defaultTokenIds, DEFAULT_MAX_ENTRANTS, address(0), 0);
    }

    // MODIFIED: Added payment token parameters
    function createRaffleERC721(
        address prizeNFT, 
        uint256 prizeTokenId, 
        uint256 maxBurn, 
        uint256[] memory acceptedTokenIds, 
        uint256 maxEntrants
    ) external onlyOwner returns (uint256) {
        return _createRaffleERC721(prizeNFT, prizeTokenId, maxBurn, acceptedTokenIds, maxEntrants, address(0), 0);
    }

    // ADDED: New function to create ERC721 raffle with ERC20 payment
    function createRaffleERC721WithPayment(
        address prizeNFT,
        uint256 prizeTokenId,
        uint256 maxEntries,
        address paymentToken,
        uint256 pricePerEntry,
        uint256 maxEntrants
    ) external onlyOwner returns (uint256) {
        return _createRaffleERC721(prizeNFT, prizeTokenId, maxEntries, new uint256[](0), maxEntrants, paymentToken, pricePerEntry);
    }

    // MODIFIED: Added payment token parameters
    function createRaffleERC1155(
        address prizeNFT,
        uint256 prizeTokenId,
        uint256 prizeAmount,
        uint256 maxBurn,
        uint256[] memory acceptedTokenIds,
        uint256 maxEntrants
    ) external onlyOwner returns (uint256) {
        if (prizeNFT == address(0)) revert InvalidState();
        if (!prizeNFT.isContract()) revert InvalidState();
        if (prizeAmount == 0) revert InvalidAmount();
        if (maxBurn == 0) revert InvalidAmount();
        if (maxEntrants == 0 || maxEntrants > MAX_ENTRANTS_BOUND) revert InvalidState();

        IERC1155(prizeNFT).safeTransferFrom(msg.sender, address(this), prizeTokenId, prizeAmount, "");

        uint256 raffleId = ++raffleCounter;
        Raffle storage raffle = raffles[raffleId];
        
        raffle.prizeNFT = prizeNFT;
        raffle.prizeTokenId = prizeTokenId;
        raffle.prizeAmount = prizeAmount;
        raffle.prizeIs1155 = true;
        raffle.creator = msg.sender;
        raffle.maxBurn = maxBurn;
        raffle.maxEntrants = maxEntrants;
        raffle.isOpen = true;
        raffle.createdAt = block.timestamp;
        
        // Only set accepted token IDs if in burn mode
        if (acceptedTokenIds.length > 0) {
            if (acceptedTokenIds.length > MAX_ACCEPTED_TOKEN_IDS) revert InvalidState();
            _setAcceptedTokenIds(raffleId, acceptedTokenIds);
        }

        emit RaffleCreated(raffleId, msg.sender, prizeNFT, prizeTokenId, true, prizeAmount, maxBurn, acceptedTokenIds, maxEntrants);
        return raffleId;
    }

    // ADDED: New function to create ERC1155 raffle with ERC20 payment
    function createRaffleERC1155WithPayment(
        address prizeNFT,
        uint256 prizeTokenId,
        uint256 prizeAmount,
        uint256 maxEntries,
        address paymentToken,
        uint256 pricePerEntry,
        uint256 maxEntrants
    ) external onlyOwner returns (uint256) {
        if (prizeNFT == address(0)) revert InvalidState();
        if (!prizeNFT.isContract()) revert InvalidState();
        if (prizeAmount == 0) revert InvalidAmount();
        if (maxEntries == 0) revert InvalidAmount();
        if (paymentToken == address(0)) revert InvalidState();
        if (!paymentToken.isContract()) revert InvalidState();
        if (pricePerEntry == 0) revert InvalidAmount();
        if (maxEntrants == 0 || maxEntrants > MAX_ENTRANTS_BOUND) revert InvalidState();

        IERC1155(prizeNFT).safeTransferFrom(msg.sender, address(this), prizeTokenId, prizeAmount, "");

        uint256 raffleId = ++raffleCounter;
        Raffle storage raffle = raffles[raffleId];
        
        raffle.prizeNFT = prizeNFT;
        raffle.prizeTokenId = prizeTokenId;
        raffle.prizeAmount = prizeAmount;
        raffle.prizeIs1155 = true;
        raffle.creator = msg.sender;
        raffle.maxBurn = maxEntries;
        raffle.maxEntrants = maxEntrants;
        raffle.isOpen = true;
        raffle.createdAt = block.timestamp;
        raffle.paymentToken = paymentToken;
        raffle.pricePerEntry = pricePerEntry;

        emit RaffleCreated(raffleId, msg.sender, prizeNFT, prizeTokenId, true, prizeAmount, maxEntries, new uint256[](0), maxEntrants);
        return raffleId;
    }

    function createRaffleExternalPrize(
        uint256 externalChainId,
        address externalPrizeCollection,
        uint256 prizeTokenId,
        bool prizeIs1155,
        uint256 prizeAmount,
        uint256 maxBurn,
        uint256[] memory acceptedTokenIds,
        address externalCustodian,
        uint256 maxEntrants
    ) external onlyOwner returns (uint256) {
        if (externalChainId == 0) revert InvalidState();
        if (externalPrizeCollection == address(0)) revert InvalidState();
        if (prizeAmount == 0) revert InvalidAmount();
        if (maxBurn == 0) revert InvalidAmount();
        if (externalCustodian == address(0)) revert InvalidState();
        if (maxEntrants == 0 || maxEntrants > MAX_ENTRANTS_BOUND) revert InvalidState();

        uint256 raffleId = ++raffleCounter;
        Raffle storage raffle = raffles[raffleId];
        
        raffle.prizeIsExternal = true;
        raffle.externalChainId = externalChainId;
        raffle.externalPrizeCollection = externalPrizeCollection;
        raffle.prizeTokenId = prizeTokenId;
        raffle.prizeIs1155 = prizeIs1155;
        raffle.prizeAmount = prizeAmount;
        raffle.externalCustodian = externalCustodian;
        raffle.creator = msg.sender;
        raffle.maxBurn = maxBurn;
        raffle.maxEntrants = maxEntrants;
        raffle.isOpen = true;
        raffle.createdAt = block.timestamp;
        
        // Only set accepted token IDs if in burn mode
        if (acceptedTokenIds.length > 0) {
            if (acceptedTokenIds.length > MAX_ACCEPTED_TOKEN_IDS) revert InvalidState();
            _setAcceptedTokenIds(raffleId, acceptedTokenIds);
        }

        emit RaffleCreated(raffleId, msg.sender, address(0), prizeTokenId, prizeIs1155, prizeAmount, maxBurn, acceptedTokenIds, maxEntrants);
        return raffleId;
    }

    // ADDED: External prize with ERC20 payment
    function createRaffleExternalPrizeWithPayment(
        uint256 externalChainId,
        address externalPrizeCollection,
        uint256 prizeTokenId,
        bool prizeIs1155,
        uint256 prizeAmount,
        uint256 maxEntries,
        address paymentToken,
        uint256 pricePerEntry,
        address externalCustodian,
        uint256 maxEntrants
    ) external onlyOwner returns (uint256) {
        if (externalChainId == 0) revert InvalidState();
        if (externalPrizeCollection == address(0)) revert InvalidState();
        if (prizeAmount == 0) revert InvalidAmount();
        if (maxEntries == 0) revert InvalidAmount();
        if (paymentToken == address(0)) revert InvalidState();
        if (!paymentToken.isContract()) revert InvalidState();
        if (pricePerEntry == 0) revert InvalidAmount();
        if (externalCustodian == address(0)) revert InvalidState();
        if (maxEntrants == 0 || maxEntrants > MAX_ENTRANTS_BOUND) revert InvalidState();

        uint256 raffleId = ++raffleCounter;
        Raffle storage raffle = raffles[raffleId];
        
        raffle.prizeIsExternal = true;
        raffle.externalChainId = externalChainId;
        raffle.externalPrizeCollection = externalPrizeCollection;
        raffle.prizeTokenId = prizeTokenId;
        raffle.prizeIs1155 = prizeIs1155;
        raffle.prizeAmount = prizeAmount;
        raffle.externalCustodian = externalCustodian;
        raffle.creator = msg.sender;
        raffle.maxBurn = maxEntries;
        raffle.maxEntrants = maxEntrants;
        raffle.isOpen = true;
        raffle.createdAt = block.timestamp;
        raffle.paymentToken = paymentToken;
        raffle.pricePerEntry = pricePerEntry;

        emit RaffleCreated(raffleId, msg.sender, address(0), prizeTokenId, prizeIs1155, prizeAmount, maxEntries, new uint256[](0), maxEntrants);
        return raffleId;
    }

    function createRaffleERC20(
        address prizeToken,
        uint256 prizeAmount,
        uint256 maxBurn,
        uint256[] memory acceptedTokenIds,
        uint256 maxEntrants
    ) external onlyOwner returns (uint256) {
        if (prizeToken == address(0)) revert InvalidState();
        if (!prizeToken.isContract()) revert InvalidState();
        if (prizeAmount == 0) revert InvalidAmount();
        if (maxBurn == 0) revert InvalidAmount();
        if (maxEntrants == 0 || maxEntrants > MAX_ENTRANTS_BOUND) revert InvalidState();

        IERC20(prizeToken).safeTransferFrom(msg.sender, address(this), prizeAmount);

        uint256 raffleId = ++raffleCounter;
        Raffle storage raffle = raffles[raffleId];
        
        raffle.prizeIsERC20 = true;
        raffle.prizeERC20Token = prizeToken;
        raffle.prizeERC20Amount = prizeAmount;
        raffle.creator = msg.sender;
        raffle.maxBurn = maxBurn;
        raffle.maxEntrants = maxEntrants;
        raffle.isOpen = true;
        raffle.createdAt = block.timestamp;
        
        // Only set accepted token IDs if in burn mode
        if (acceptedTokenIds.length > 0) {
            if (acceptedTokenIds.length > MAX_ACCEPTED_TOKEN_IDS) revert InvalidState();
            _setAcceptedTokenIds(raffleId, acceptedTokenIds);
        }

        emit ERC20RaffleCreated(raffleId, msg.sender, prizeToken, prizeAmount, maxBurn, acceptedTokenIds, maxEntrants);
        return raffleId;
    }

    // ADDED: ERC20 prize with ERC20 payment
    function createRaffleERC20WithPayment(
        address prizeToken,
        uint256 prizeAmount,
        uint256 maxEntries,
        address paymentToken,
        uint256 pricePerEntry,
        uint256 maxEntrants
    ) external onlyOwner returns (uint256) {
        if (prizeToken == address(0)) revert InvalidState();
        if (!prizeToken.isContract()) revert InvalidState();
        if (prizeAmount == 0) revert InvalidAmount();
        if (maxEntries == 0) revert InvalidAmount();
        if (paymentToken == address(0)) revert InvalidState();
        if (!paymentToken.isContract()) revert InvalidState();
        if (pricePerEntry == 0) revert InvalidAmount();
        if (maxEntrants == 0 || maxEntrants > MAX_ENTRANTS_BOUND) revert InvalidState();

        IERC20(prizeToken).safeTransferFrom(msg.sender, address(this), prizeAmount);

        uint256 raffleId = ++raffleCounter;
        Raffle storage raffle = raffles[raffleId];
        
        raffle.prizeIsERC20 = true;
        raffle.prizeERC20Token = prizeToken;
        raffle.prizeERC20Amount = prizeAmount;
        raffle.creator = msg.sender;
        raffle.maxBurn = maxEntries;
        raffle.maxEntrants = maxEntrants;
        raffle.isOpen = true;
        raffle.createdAt = block.timestamp;
        raffle.paymentToken = paymentToken;
        raffle.pricePerEntry = pricePerEntry;

        emit ERC20RaffleCreated(raffleId, msg.sender, prizeToken, prizeAmount, maxEntries, new uint256[](0), maxEntrants);
        return raffleId;
    }

    // MODIFIED: Internal function now accepts payment parameters
    function _createRaffleERC721(
        address prizeNFT,
        uint256 prizeTokenId,
        uint256 maxBurn,
        uint256[] memory acceptedTokenIds,
        uint256 maxEntrants,
        address paymentToken,
        uint256 pricePerEntry
    ) internal returns (uint256) {
        if (prizeNFT == address(0)) revert InvalidState();
        if (!prizeNFT.isContract()) revert InvalidState();
        if (maxBurn == 0) revert InvalidAmount();
        if (maxEntrants == 0 || maxEntrants > MAX_ENTRANTS_BOUND) revert InvalidState();
        
        // MODIFIED: Validate based on mode
        if (paymentToken != address(0)) {
            // ERC20 mode
            if (!paymentToken.isContract()) revert InvalidState();
            if (pricePerEntry == 0) revert InvalidAmount();
        } else {
            // Burn mode - need accepted token IDs
            if (acceptedTokenIds.length == 0 || acceptedTokenIds.length > MAX_ACCEPTED_TOKEN_IDS) revert InvalidState();
        }

        IERC721(prizeNFT).safeTransferFrom(msg.sender, address(this), prizeTokenId);

        uint256 raffleId = ++raffleCounter;
        Raffle storage r = raffles[raffleId];
        
        r.prizeNFT = prizeNFT;
        r.prizeTokenId = prizeTokenId;
        r.prizeAmount = 1;
        r.prizeIs1155 = false;
        r.creator = msg.sender;
        r.maxBurn = maxBurn;
        r.maxEntrants = maxEntrants;
        r.isOpen = true;
        r.createdAt = block.timestamp;
        r.paymentToken = paymentToken;
        r.pricePerEntry = pricePerEntry;
        
        // Only set accepted token IDs if in burn mode
        if (paymentToken == address(0) && acceptedTokenIds.length > 0) {
            _setAcceptedTokenIds(raffleId, acceptedTokenIds);
        }

        emit RaffleCreated(raffleId, msg.sender, prizeNFT, prizeTokenId, false, 1, maxBurn, acceptedTokenIds, maxEntrants);
        return raffleId;
    }

    function _setAcceptedTokenIds(uint256 raffleId, uint256[] memory acceptedTokenIds) internal {
        uint256 tokenCount = acceptedTokenIds.length;
        for (uint256 i = 0; i < tokenCount;) {
            uint256 tokenId = acceptedTokenIds[i];
            if (!raffleTokenIdAllowed[raffleId][tokenId]) {
                raffleTokenIdAllowed[raffleId][tokenId] = true;
                raffles[raffleId].acceptedTokenIds.push(tokenId);
            }
            unchecked { ++i; }
        }
    }

    // MODIFIED: Check entry mode and try auto-finalize
    function enterRaffle(uint256 raffleId, uint256 tokenId, uint256 amount) external nonReentrant {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage raffle = raffles[raffleId];
        
        // MODIFIED: Must be in burn mode
        if (raffle.paymentToken != address(0)) revert WrongEntryMode();
        
        _enterRaffleInternal(raffleId, tokenId, amount);
        _markTokenIdUsed(raffleId, tokenId);
        emit RaffleEntered(raffleId, msg.sender, tokenId, amount);
        
        // NEW: Try auto-finalize if raffle is full
        if (raffle.burned == raffle.maxBurn) {
            _tryAutoFinalize(raffleId);
        }
    }

    // MODIFIED: Try auto-finalize when full
    function enterRaffleWithToken(uint256 raffleId, uint256 entries) external nonReentrant {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage raffle = raffles[raffleId];
        
        // MODIFIED: Must be in ERC20 mode
        if (raffle.paymentToken == address(0)) revert WrongEntryMode();
        
        if (raffle.isCanceled) revert RaffleCanceledError();
        if (!raffle.isOpen) revert RaffleNotOpen();
        if (raffle.isPaused) revert RafflePausedError();
        if (raffle.awaitingRandomness) revert RandomnessPending();
        if (entries == 0) revert InvalidAmount();
        if (raffle.burned + entries > raffle.maxBurn) revert MaxBurnExceeded();

        bool isNewEntrant = raffleEntries[raffleId][msg.sender] == 0;
        if (isNewEntrant && raffle.entrants.length >= raffle.maxEntrants) {
            revert TooManyEntrants();
        }

        uint256 cost = entries * raffle.pricePerEntry;
        IERC20(raffle.paymentToken).safeTransferFrom(msg.sender, address(this), cost);
        
        _erc20Paid[raffleId][msg.sender] += cost;
        raffle.proceedsAccrued += cost;
        
        if (isNewEntrant) {
            raffle.entrants.push(msg.sender);
        }
        raffleEntries[raffleId][msg.sender] += entries;
        raffle.burned += entries;

        emit RafflePurchased(raffleId, msg.sender, raffle.paymentToken, entries, cost);

        // NEW: Try auto-finalize if raffle is full
        if (raffle.burned == raffle.maxBurn) {
            _tryAutoFinalize(raffleId);
        }
    }

    function enterRaffleWithTokenPermit(
        uint256 raffleId,
        uint256 entries,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external nonReentrant {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage raffle = raffles[raffleId];
        
        // MODIFIED: Must be in ERC20 mode
        if (raffle.paymentToken == address(0)) revert WrongEntryMode();
        
        // Validate that the payment token supports permits
        // This will revert if the token doesn't implement IERC20Permit
        try IERC20Permit(raffle.paymentToken).DOMAIN_SEPARATOR() returns (bytes32) {
            // Token supports permits, continue
        } catch {
            revert InvalidState(); // Token doesn't support permits
        }
        
        if (raffle.isCanceled) revert RaffleCanceledError();
        if (!raffle.isOpen) revert RaffleNotOpen();
        if (raffle.isPaused) revert RafflePausedError();
        if (raffle.awaitingRandomness) revert RandomnessPending();
        if (entries == 0) revert InvalidAmount();
        if (raffle.burned + entries > raffle.maxBurn) revert MaxBurnExceeded();

        bool isNewEntrant = raffleEntries[raffleId][msg.sender] == 0;
        if (isNewEntrant && raffle.entrants.length >= raffle.maxEntrants) {
            revert TooManyEntrants();
        }

        uint256 cost = entries * raffle.pricePerEntry;
        
        IERC20Permit(raffle.paymentToken).permit(
            msg.sender,
            address(this),
            cost,
            deadline,
            v,
            r,
            s
        );
        
        IERC20(raffle.paymentToken).safeTransferFrom(msg.sender, address(this), cost);
        
        _erc20Paid[raffleId][msg.sender] += cost;
        raffle.proceedsAccrued += cost;
        
        if (isNewEntrant) {
            raffle.entrants.push(msg.sender);
        }
        raffleEntries[raffleId][msg.sender] += entries;
        raffle.burned += entries;

        emit RaffleEnteredWithPermit(raffleId, msg.sender, raffle.paymentToken, entries, cost);

        // NEW: Try auto-finalize if raffle is full
        if (raffle.burned == raffle.maxBurn) {
            _tryAutoFinalize(raffleId);
        }
    }

    function _enterRaffleInternal(uint256 raffleId, uint256 tokenId, uint256 amount) internal {
        Raffle storage raffle = raffles[raffleId];
        if (raffle.isCanceled) revert RaffleCanceledError();
        if (!raffle.isOpen) revert RaffleNotOpen();
        if (raffle.isPaused) revert RafflePausedError();
        if (raffle.awaitingRandomness) revert RandomnessPending();
        if (!raffleTokenIdAllowed[raffleId][tokenId]) revert TokenNotAccepted();
        if (amount == 0) revert InvalidAmount();
        if (raffle.burned + amount > raffle.maxBurn) revert MaxBurnExceeded();

        bool isNewEntrant = raffleEntries[raffleId][msg.sender] == 0;
        if (isNewEntrant && raffle.entrants.length >= raffle.maxEntrants) {
            revert TooManyEntrants();
        }

        geezToken.safeTransferFrom(msg.sender, address(this), tokenId, amount, "");
        
        _escrow[raffleId][msg.sender][tokenId] += amount;
        _escrowTotals[raffleId][tokenId] += amount;
        
        if (isNewEntrant) {
            raffle.entrants.push(msg.sender);
        }
        raffleEntries[raffleId][msg.sender] += amount;
        raffle.burned += amount;
    }

    function _markTokenIdUsed(uint256 raffleId, uint256 tokenId) internal {
        if (!_tokenIdUsed[raffleId][tokenId]) {
            _tokenIdUsed[raffleId][tokenId] = true;
            raffles[raffleId].usedTokenIds.push(tokenId);
        }
    }

    function _calculateWeights(uint256 raffleId) internal {
        Raffle storage r = raffles[raffleId];
        if (r.weightsCalculated) return;
        
        uint256 entrantCount = r.entrants.length;
        r.cumulativeWeights = new uint256[](entrantCount);
        
        uint256 cumulativeWeight = 0;
        for (uint256 i = 0; i < entrantCount;) {
            address entrant = r.entrants[i];
            uint256 userEntries = raffleEntries[raffleId][entrant];
            cumulativeWeight += userEntries;
            r.cumulativeWeights[i] = cumulativeWeight;
            unchecked { ++i; }
        }
        
        r.totalWeight = cumulativeWeight;
        r.weightsCalculated = true;
        
        emit WeightsCalculated(raffleId, cumulativeWeight);
    }

    function _finalize(uint256 raffleId, uint256 vrngFee) internal {
        Raffle storage r = raffles[raffleId];
        if (!r.isOpen) revert RaffleNotOpen();
        if (r.entrants.length == 0) revert InvalidState();
        if (r.awaitingRandomness) revert RandomnessPending();

        r.awaitingRandomness = true;
        r.vrngRequestTimestamp = block.timestamp;
        
        uint256 requestId = vrngRouter.requestRandomNumberWithTraceId{value: vrngFee}(raffleId);
        if (requestId == 0) revert InvalidState();
        
        r.vrngRequestId = requestId;
        vrngRequestToRaffle[requestId] = raffleId;
        
        emit VRNGRequested(raffleId, requestId, raffleId);
    }

    function _completeFinalization(uint256 raffleId, uint256 randomNumber) internal {
        Raffle storage r = raffles[raffleId];
        if (!r.weightsCalculated) revert InvalidState();
        if (r.totalWeight == 0) revert InvalidState();
        
        uint256 winningNumber = randomNumber % r.totalWeight;
        address winner = _findWinnerBinarySearch(raffleId, winningNumber);
        
        if (winner == address(0)) revert InvalidState();
        r.winner = winner;
        
        _transferPrize(raffleId, winner);
        emit RaffleWinner(raffleId, winner);
        
        // MODIFIED: Only burn if in burn mode and burning is allowed
        if (r.paymentToken == address(0) && isSelfBurnAllowed) {
            _burnEscrowedTokens(raffleId);
        }
        
        _cleanupStorage(raffleId);
        r.storageCanBePruned = true;
        
        r.isOpen = false;
        emit RaffleClosed(raffleId);
    }

    function _findWinnerBinarySearch(uint256 raffleId, uint256 target) internal view returns (address) {
        Raffle storage r = raffles[raffleId];
        uint256 left = 0;
        uint256 right = r.cumulativeWeights.length;
        
        while (left < right) {
            uint256 mid = left + (right - left) / 2;
            if (r.cumulativeWeights[mid] <= target) {
                left = mid + 1;
            } else {
                right = mid;
            }
        }
        
        return left < r.entrants.length ? r.entrants[left] : address(0);
    }

    function _transferPrize(uint256 raffleId, address winner) internal {
        Raffle storage r = raffles[raffleId];
        
        if (r.prizeIsERC20) {
            IERC20(r.prizeERC20Token).safeTransfer(winner, r.prizeERC20Amount);
            r.prizeERC20Amount = 0;
        } else if (r.prizeIsExternal) {
            emit ExternalPrizeAnnounced(
                raffleId, 
                winner, 
                r.externalChainId, 
                r.externalPrizeCollection, 
                r.prizeTokenId, 
                r.prizeIs1155, 
                r.prizeAmount
            );
        } else {
            if (r.prizeIs1155) {
                IERC1155(r.prizeNFT).safeTransferFrom(address(this), winner, r.prizeTokenId, r.prizeAmount, "");
            } else {
                IERC721(r.prizeNFT).safeTransferFrom(address(this), winner, r.prizeTokenId);
            }
        }
    }

    function _burnEscrowedTokens(uint256 raffleId) internal {
        Raffle storage r = raffles[raffleId];
        
        uint256 usedTokenCount = r.usedTokenIds.length;
        for (uint256 i = 0; i < usedTokenCount;) {
            uint256 tokenId = r.usedTokenIds[i];
            uint256 totalAmount = _escrowTotals[raffleId][tokenId];
            
            if (totalAmount > 0) {
                try geezToken.burn(address(this), tokenId, totalAmount) {
                    delete _escrowTotals[raffleId][tokenId];
                } catch {
                    r.burnFailed = true;
                }
            }
            unchecked { ++i; }
        }
    }

    function _cleanupStorage(uint256 raffleId) internal {
        Raffle storage r = raffles[raffleId];
        
        uint256 entrantCount = r.entrants.length;
        for (uint256 i = 0; i < entrantCount;) {
            address entrant = r.entrants[i];
            delete raffleEntries[raffleId][entrant];
            delete _erc20Paid[raffleId][entrant];
            
            // Only cleanup escrow if in burn mode
            if (r.paymentToken == address(0)) {
                uint256 usedTokenCount = r.usedTokenIds.length;
                for (uint256 j = 0; j < usedTokenCount;) {
                    delete _escrow[raffleId][entrant][r.usedTokenIds[j]];
                    unchecked { ++j; }
                }
            }
            unchecked { ++i; }
        }
    }

    function adminFinalizeRaffle(uint256 raffleId) external payable onlyOwner nonReentrant {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage raffle = raffles[raffleId];
        if (!raffle.isOpen) revert RaffleNotOpen();
        if (raffle.entrants.length == 0) revert InvalidState();
        if (raffle.awaitingRandomness) revert RandomnessPending();
        if (raffle.burned != raffle.maxBurn) revert NotReadyToFinalize();
        
        if (vrngFeeWei > 0 && msg.value != vrngFeeWei) revert InvalidAmount();
        if (vrngFeeWei == 0 && msg.value != 0) revert InvalidAmount();
        
        uint256 lastAttempt = lastFinalizationAttempt[raffleId];
        if (lastAttempt > 0 && block.timestamp < lastAttempt + MIN_FINALIZATION_DELAY) {
            revert InvalidState();
        }
        lastFinalizationAttempt[raffleId] = block.timestamp;
        
        _calculateWeights(raffleId);
        _finalize(raffleId, msg.value);
    }

    function pauseRaffle(uint256 raffleId) external onlyOwner {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage raffle = raffles[raffleId];
        if (!raffle.isOpen) revert RaffleNotOpen();
        if (raffle.isPaused) revert InvalidState();
        
        raffle.isPaused = true;
        emit RafflePaused(raffleId);
    }

    function unpauseRaffle(uint256 raffleId) external onlyOwner {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage raffle = raffles[raffleId];
        if (!raffle.isOpen) revert RaffleNotOpen();
        if (!raffle.isPaused) revert InvalidState();
        
        raffle.isPaused = false;
        emit RaffleUnpaused(raffleId);
    }

    function cancelRaffle(uint256 raffleId) external onlyOwner nonReentrant {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage raffle = raffles[raffleId];
        if (!raffle.isOpen) revert RaffleNotOpen();
        if (raffle.isCanceled) revert InvalidState();
        
        raffle.isCanceled = true;
        raffle.isOpen = false;
        raffle.storageCanBePruned = true;
        
        if (raffle.awaitingRandomness) {
            raffle.awaitingRandomness = false;
            delete vrngRequestToRaffle[raffle.vrngRequestId];
        }
        
        emit RaffleCanceled(raffleId, false);
    }

    function processRefunds(
        uint256 raffleId,
        uint256 start,
        uint256 end
    ) external onlyOwner nonReentrant {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage r = raffles[raffleId];
        if (!r.isCanceled) revert InvalidState();
        
        uint256 entrantCount = r.entrants.length;
        if (end > entrantCount) end = entrantCount;
        if (start >= end) revert InvalidState();
        if (end - start > REFUND_BATCH_SIZE) revert InvalidState();
        
        uint256 processed = 0;
        for (uint256 i = start; i < end;) {
            _refundSingle(raffleId, r.entrants[i]);
            unchecked { 
                ++processed;
                ++i;
            }
        }
        
        if (end > r.refundProgress) {
            r.refundProgress = end;
        }
        
        emit BatchRefundProcessed(raffleId, start, end, processed);
    }

    function processRefundsFor(
        uint256 raffleId,
        address[] calldata users
    ) external onlyOwner nonReentrant {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage r = raffles[raffleId];
        if (!r.isCanceled) revert InvalidState();
        if (users.length > REFUND_BATCH_SIZE) revert InvalidState();
        
        uint256 userCount = users.length;
        for (uint256 i = 0; i < userCount;) {
            _refundSingle(raffleId, users[i]);
            unchecked { ++i; }
        }
        
        // Check if all refunds are complete after processing
        bool allRefundsComplete = true;
        
        // MODIFIED: Check based on entry mode
        if (r.paymentToken == address(0)) {
            // Burn mode - check escrow totals
            uint256 usedTokenCount = r.usedTokenIds.length;
            for (uint256 i = 0; i < usedTokenCount;) {
                if (_escrowTotals[raffleId][r.usedTokenIds[i]] > 0) {
                    allRefundsComplete = false;
                    break;
                }
                unchecked { ++i; }
            }
        } else {
            // ERC20 mode - check proceeds
            if (r.proceedsAccrued > 0) {
                allRefundsComplete = false;
            }
        }
        
        if (allRefundsComplete) {
            r.refundProgress = r.entrants.length;
        }
        
        emit BatchRefundProcessed(raffleId, 0, userCount, userCount);
    }

    // MODIFIED: Handle both burn and ERC20 refunds
    function _refundSingle(uint256 raffleId, address user) internal {
        Raffle storage r = raffles[raffleId];
        
        if (r.paymentToken == address(0)) {
            // Burn mode refunds
            uint256 tokenRefund = 0;
            uint256 nonZeroCount = 0;
            
            uint256[] memory ids = r.usedTokenIds;
            uint256 usedTokenCount = ids.length;
            
            // First pass: count non-zero amounts
            for (uint256 j = 0; j < usedTokenCount;) {
                uint256 amount = _escrow[raffleId][user][ids[j]];
                if (amount > 0) {
                    tokenRefund += amount;
                    unchecked { ++nonZeroCount; }
                }
                unchecked { ++j; }
            }

            if (tokenRefund > 0) {
                uint256[] memory refundIds = new uint256[](nonZeroCount);
                uint256[] memory refundAmounts = new uint256[](nonZeroCount);
                uint256 index = 0;
                
                for (uint256 j = 0; j < usedTokenCount;) {
                    uint256 tokenId = ids[j];
                    uint256 amount = _escrow[raffleId][user][tokenId];
                    if (amount > 0) {
                        refundIds[index] = tokenId;
                        refundAmounts[index] = amount;
                        delete _escrow[raffleId][user][tokenId];
                        _escrowTotals[raffleId][tokenId] -= amount;
                        unchecked { ++index; }
                    }
                    unchecked { ++j; }
                }
                
                if (nonZeroCount == 1) {
                    geezToken.safeTransferFrom(address(this), user, refundIds[0], refundAmounts[0], "");
                } else {
                    geezToken.safeBatchTransferFrom(address(this), user, refundIds, refundAmounts, "");
                }
                
                emit RefundIssued(raffleId, user, tokenRefund);
            }
        } else {
            // ERC20 mode refunds
            uint256 paidAmount = _erc20Paid[raffleId][user];
            if (paidAmount > 0) {
                delete _erc20Paid[raffleId][user];
                r.proceedsAccrued -= paidAmount;
                IERC20(r.paymentToken).safeTransfer(user, paidAmount);
                emit TokenRefundIssued(raffleId, user, r.paymentToken, paidAmount);
            }
        }
    }

    function deleteRaffle(uint256 raffleId) external onlyOwner nonReentrant {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage raffle = raffles[raffleId];
        
        if (raffle.burned != 0) revert InvalidState();
        if (raffle.entrants.length != 0) revert InvalidState();
        if (raffle.proceedsAccrued != 0) revert InvalidState();
        if (raffle.winner != address(0)) revert InvalidState();
        if (raffle.awaitingRandomness) revert InvalidState();
        if (raffle.isCanceled) revert InvalidState();
        
        address creator = raffle.creator;
        
        if (!raffle.prizeIsExternal) {
            if (raffle.prizeIsERC20) {
                IERC20(raffle.prizeERC20Token).safeTransfer(creator, raffle.prizeERC20Amount);
            } else if (raffle.prizeIs1155) {
                IERC1155(raffle.prizeNFT).safeTransferFrom(address(this), creator, raffle.prizeTokenId, raffle.prizeAmount, "");
            } else {
                IERC721(raffle.prizeNFT).safeTransferFrom(address(this), creator, raffle.prizeTokenId);
            }
        }
        
        if (raffle.vrngRequestId != 0) {
            delete vrngRequestToRaffle[raffle.vrngRequestId];
        }
        
        uint256 acceptedCount = raffle.acceptedTokenIds.length;
        for (uint256 i = 0; i < acceptedCount;) {
            delete raffleTokenIdAllowed[raffleId][raffle.acceptedTokenIds[i]];
            unchecked { ++i; }
        }
        
        delete raffles[raffleId];
        emit RaffleDeleted(raffleId, creator);
    }

    function adminWithdrawPrizeNFT(uint256 raffleId) external onlyOwner nonReentrant {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage raffle = raffles[raffleId];
        if (!raffle.isCanceled) revert InvalidState();
        if (raffle.prizeIsExternal) revert InvalidState();
        if (raffle.prizeWithdrawnIfCanceled) revert InvalidState();
        
        raffle.prizeWithdrawnIfCanceled = true;
        
        if (raffle.prizeIsERC20) {
            IERC20(raffle.prizeERC20Token).safeTransfer(owner(), raffle.prizeERC20Amount);
            raffle.prizeERC20Amount = 0;
        } else if (raffle.prizeIs1155) {
            IERC1155(raffle.prizeNFT).safeTransferFrom(address(this), owner(), raffle.prizeTokenId, raffle.prizeAmount, "");
        } else {
            IERC721(raffle.prizeNFT).safeTransferFrom(address(this), owner(), raffle.prizeTokenId);
        }
        
        emit PrizeWithdrawn(raffleId);
    }

    function withdrawProceeds(uint256 raffleId, address to) external onlyOwner nonReentrant {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage raffle = raffles[raffleId];
        if (raffle.isOpen) revert InvalidState();
        if (raffle.isCanceled) revert InvalidState();
        if (raffle.paymentToken == address(0)) revert InvalidState();
        if (raffle.proceedsAccrued == 0) revert InvalidAmount();
        if (to == address(0)) revert BadRecipient();
        
        uint256 amount = raffle.proceedsAccrued;
        raffle.proceedsAccrued = 0;
        
        IERC20(raffle.paymentToken).safeTransfer(to, amount);
        emit ProceedsWithdrawn(raffleId, raffle.paymentToken, to, amount);
    }

    function markExternalPrizeDelivered(uint256 raffleId, bytes32 externalTxHash) external nonReentrant {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage raffle = raffles[raffleId];
        if (msg.sender != owner() && msg.sender != raffle.externalCustodian) revert UnauthorizedCaller();
        if (!raffle.prizeIsExternal) revert InvalidState();
        if (raffle.isOpen) revert InvalidState();
        if (raffle.externalDelivered) revert InvalidState();
        
        raffle.externalDelivered = true;
        emit ExternalPrizeDeliveryMarked(raffleId, msg.sender, externalTxHash);
    }

    function setExternalCustodian(uint256 raffleId, address newCustodian) external onlyOwner {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        if (newCustodian == address(0)) revert BadRecipient();
        Raffle storage raffle = raffles[raffleId];
        if (!raffle.prizeIsExternal) revert InvalidState();
        if (!raffle.isOpen && raffle.externalDelivered) revert InvalidState();
        
        raffle.externalCustodian = newCustodian;
        emit ExternalCustodianUpdated(raffleId, newCustodian);
    }

    function rescueETH(address to) external onlyOwner nonReentrant {
        if (to == address(0)) revert BadRecipient();
        (bool ok,) = payable(to).call{value: address(this).balance}("");
        if (!ok) revert InvalidState();
    }

    function rescueERC20(address token, address to, uint256 amount) external onlyOwner nonReentrant {
        if (to == address(0)) revert BadRecipient();
        if (amount == 0) revert InvalidAmount();
        
        uint256 contractBalance = IERC20(token).balanceOf(address(this));
        if (amount > contractBalance) revert InvalidAmount();
        
        uint256 protectedAmount = _calculateProtectedTokenAmount(token);
        if (contractBalance < protectedAmount + amount) revert InvalidState();
        
        IERC20(token).safeTransfer(to, amount);
    }

    function _calculateProtectedTokenAmount(address token) internal view returns (uint256) {
        uint256 protected = 0;
        
        for (uint256 id = 1; id <= raffleCounter;) {
            Raffle storage r = raffles[id];
            
            if (r.creator == address(0)) {
                unchecked { ++id; }
                continue;
            }
            
            if (r.paymentToken == token && (r.isOpen || r.proceedsAccrued > 0)) {
                protected += r.proceedsAccrued;
            }
            
            if (r.prizeIsERC20 && r.prizeERC20Token == token && (!r.isCanceled || !r.prizeWithdrawnIfCanceled)) {
                protected += r.prizeERC20Amount;
            }
            unchecked { ++id; }
        }
        
        return protected;
    }

    // MODIFIED: Handle both modes
    function claimRefund(uint256 raffleId, uint256[] memory tokenIds) external nonReentrant {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage raffle = raffles[raffleId];
        if (!raffle.isCanceled) revert InvalidState();
        
        if (raffle.paymentToken == address(0)) {
            // Burn mode - refund specific tokens
            _refundSpecificTokens(raffleId, msg.sender, tokenIds);
        } else {
            // ERC20 mode - refund payment
            uint256 paidAmount = _erc20Paid[raffleId][msg.sender];
            if (paidAmount > 0) {
                delete _erc20Paid[raffleId][msg.sender];
                raffle.proceedsAccrued -= paidAmount;
                IERC20(raffle.paymentToken).safeTransfer(msg.sender, paidAmount);
                emit TokenRefundIssued(raffleId, msg.sender, raffle.paymentToken, paidAmount);
            }
        }
    }

    function claimRefundAll(uint256 raffleId) external nonReentrant {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage raffle = raffles[raffleId];
        if (!raffle.isCanceled) revert InvalidState();
        
        _refundSingle(raffleId, msg.sender);
    }

    function _refundSpecificTokens(uint256 raffleId, address user, uint256[] memory tokenIds) internal {
        uint256 tokenRefund = 0;
        uint256 nonZeroCount = 0;
        uint256 tokenCount = tokenIds.length;
        
        for (uint256 i = 0; i < tokenCount;) {
            uint256 amount = _escrow[raffleId][user][tokenIds[i]];
            if (amount > 0) {
                tokenRefund += amount;
                unchecked { ++nonZeroCount; }
            }
            unchecked { ++i; }
        }
        
        if (tokenRefund > 0) {
            uint256[] memory refundIds = new uint256[](nonZeroCount);
            uint256[] memory refundAmounts = new uint256[](nonZeroCount);
            uint256 index = 0;
            
            for (uint256 i = 0; i < tokenCount;) {
                uint256 tokenId = tokenIds[i];
                uint256 amount = _escrow[raffleId][user][tokenId];
                if (amount > 0) {
                    refundIds[index] = tokenId;
                    refundAmounts[index] = amount;
                    delete _escrow[raffleId][user][tokenId];
                    _escrowTotals[raffleId][tokenId] -= amount;
                    unchecked { ++index; }
                }
                unchecked { ++i; }
            }
            
            if (nonZeroCount == 1) {
                geezToken.safeTransferFrom(address(this), user, refundIds[0], refundAmounts[0], "");
            } else {
                geezToken.safeBatchTransferFrom(address(this), user, refundIds, refundAmounts, "");
            }
            
            emit RefundIssued(raffleId, user, tokenRefund);
        }
    }

    // View functions remain unchanged

    function isReadyToFinalize(uint256 raffleId) external view returns (bool) {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage r = raffles[raffleId];
        return r.isOpen && !r.isCanceled && !r.awaitingRandomness && 
               r.burned == r.maxBurn && r.entrants.length > 0;
    }

    function getRaffleStats(uint256 raffleId) external view returns (
        address prizeNFT,
        uint256 prizeTokenId,
        address creator,
        uint256 maxBurn,
        uint256 burned,
        bool isOpen,
        bool isPaused,
        bool isCanceled,
        uint256 entrantsCount,
        bool awaitingRandomness,
        uint256 maxEntrants
    ) {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage r = raffles[raffleId];
        
        return (
            r.prizeNFT,
            r.prizeTokenId,
            r.creator,
            r.maxBurn,
            r.burned,
            r.isOpen,
            r.isPaused,
            r.isCanceled,
            r.entrants.length,
            r.awaitingRandomness,
            r.maxEntrants
        );
    }

    function getRaffleDetails(uint256 raffleId) external view returns (
        bool prizeIs1155,
        uint256 prizeAmount,
        uint256[] memory acceptedTokenIds,
        bool prizeIsExternal,
        uint256 externalChainId,
        address externalPrizeCollection,
        address externalCustodian,
        bool externalDelivered
    ) {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage r = raffles[raffleId];
        
        return (
            r.prizeIs1155,
            r.prizeAmount,
            r.acceptedTokenIds,
            r.prizeIsExternal,
            r.externalChainId,
            r.externalPrizeCollection,
            r.externalCustodian,
            r.externalDelivered
        );
    }

    function getPaymentConfig(uint256 raffleId) external view returns (
        address paymentToken,
        uint256 pricePerEntry,
        uint256 proceedsAccrued
    ) {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage r = raffles[raffleId];
        
        return (
            r.paymentToken,
            r.pricePerEntry,
            r.proceedsAccrued
        );
    }

    function getWinnerInfo(uint256 raffleId) external view returns (
        address winner,
        uint256 vrngRequestId,
        bool awaitingRandomness,
        uint256 vrngRequestTimestamp
    ) {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage r = raffles[raffleId];
        
        return (
            r.winner,
            r.vrngRequestId,
            r.awaitingRandomness,
            r.vrngRequestTimestamp
        );
    }

    function getUserEntries(uint256 raffleId, address user) external view returns (uint256) {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        return raffleEntries[raffleId][user];
    }

    function getRaffleEntrants(uint256 raffleId) external view returns (address[] memory) {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        return raffles[raffleId].entrants;
    }

    function getUsedTokenIds(uint256 raffleId) external view returns (uint256[] memory) {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        return raffles[raffleId].usedTokenIds;
    }


    function getRefundStatus(uint256 raffleId, address user) external view returns (
        uint256 tokenRefundAvailable,
        uint256 erc20RefundAvailable,
        bool hasRefundableTokens,
        bool hasRefundableERC20
    ) {
        if (raffleId == 0 || raffleId > raffleCounter) revert InvalidRaffleId();
        Raffle storage r = raffles[raffleId];
        
        if (r.paymentToken == address(0)) {
            // Burn mode
            uint256 usedTokenCount = r.usedTokenIds.length;
            for (uint256 i = 0; i < usedTokenCount;) {
                tokenRefundAvailable += _escrow[raffleId][user][r.usedTokenIds[i]];
                unchecked { ++i; }
            }
            hasRefundableTokens = tokenRefundAvailable > 0;
        } else {
            // ERC20 mode
            erc20RefundAvailable = _erc20Paid[raffleId][user];
            hasRefundableERC20 = erc20RefundAvailable > 0;
        }
    }

    // NEW: Auto-finalization view functions
    function getAutoFinalizationConfig() external view returns (
        bool enabled,
        uint256 buffer
    ) {
        return (autoFinalizationEnabled, vrngFeeBuffer);
    }

    function getVRNGFeeStatus() external view returns (
        uint256 fee,
        uint256 balance,
        uint256 buffer,
        bool hasEnough
    ) {
        balance = address(this).balance;
        hasEnough = vrngFeeWei == 0 || balance >= vrngFeeWei;
        fee = vrngFeeWei;
        buffer = vrngFeeBuffer;
    }

    function getVRNGRouter() external view returns (address) {
        return address(vrngRouter);
    }



    function onERC721Received(address, address, uint256, bytes calldata) external pure override returns (bytes4) {
        return IERC721Receiver.onERC721Received.selector;
    }

    function onERC1155Received(address, address, uint256, uint256, bytes calldata) external pure override returns (bytes4) {
        return IERC1155Receiver.onERC1155Received.selector;
    }

    function onERC1155BatchReceived(address, address, uint256[] calldata, uint256[] calldata, bytes calldata) external pure override returns (bytes4) {
        return IERC1155Receiver.onERC1155BatchReceived.selector;
    }

    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return interfaceId == type(IERC721Receiver).interfaceId ||
               interfaceId == type(IERC1155Receiver).interfaceId ||
               super.supportsInterface(interfaceId);
    }

    receive() external payable {
        if (msg.sender != address(vrngRouter)) {
            // Allow funding for VRNG fees from anyone
            emit VRNGFeesFunded(msg.sender, msg.value);
        }
    }

    fallback() external payable {
        revert BadRecipient();
    }
}

// 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 v4.9.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(
        address[] calldata accounts,
        uint256[] calldata ids
    ) external view returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev _Available since v3.1._
 */
interface IERC1155Receiver is IERC165 {
    /**
     * @dev Handles the receipt of a single ERC1155 token type. This function is
     * called at the end of a `safeTransferFrom` after the balance has been updated.
     *
     * NOTE: To accept the transfer, this must return
     * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
     * (i.e. 0xf23a6e61, or its own function selector).
     *
     * @param operator The address which initiated the transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param id The ID of the token being transferred
     * @param value The amount of tokens being transferred
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
     */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4);

    /**
     * @dev Handles the receipt of a multiple ERC1155 token types. This function
     * is called at the end of a `safeBatchTransferFrom` after the balances have
     * been updated.
     *
     * NOTE: To accept the transfer(s), this must return
     * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
     * (i.e. 0xbc197c81, or its own function selector).
     *
     * @param operator The address which initiated the batch transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param ids An array containing ids of each token being transferred (order and length must match values array)
     * @param values An array containing amounts of each token being transferred (order and length must match ids array)
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
     */
    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external returns (bytes4);
}

// 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) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// 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 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);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1
  },
  "viaIR": true,
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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IVRNGRouter","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdrawExcessETH","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"raffleId","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"withdrawProceeds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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000000000000000000000000892afc232b0741c4eebafea2e982ef842ecec14a0000000000000000000000005f78f2e450c82c782a26c713a4413f5ba2aaa0c3

-----Decoded View---------------
Arg [0] : _geezToken (address): 0x892AFc232b0741c4eEbAfea2e982ef842ECEc14A
Arg [1] : _vrngRouter (address): 0x5F78F2e450C82C782a26C713a4413f5Ba2aaa0c3

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000892afc232b0741c4eebafea2e982ef842ecec14a
Arg [1] : 0000000000000000000000005f78f2e450c82c782a26c713a4413f5ba2aaa0c3