Amoy Testnet

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0x32a20C3f1386CDAC2103056E26b5e9B4b8501E5F

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Book Rooms181406352025-02-16 10:40:4810 hrs ago1739702448IN
0x32a20C3f...4b8501E5F
0 POL0.0368657297
Book Rooms181280372025-02-16 3:14:0618 hrs ago1739675646IN
0x32a20C3f...4b8501E5F
0 POL0.0146621838.57993731
Book Rooms181209642025-02-15 23:03:2422 hrs ago1739660604IN
0x32a20C3f...4b8501E5F
0 POL0.0124400232.73183498
Book Rooms181209042025-02-15 23:01:1622 hrs ago1739660476IN
0x32a20C3f...4b8501E5F
0 POL0.0124400232.73183498
Book Rooms181145132025-02-15 19:14:5226 hrs ago1739646892IN
0x32a20C3f...4b8501E5F
0 POL0.0170937644.97803907
Book Rooms180867832025-02-15 2:09:2643 hrs ago1739585366IN
0x32a20C3f...4b8501E5F
0 POL0.0142687737.54476579
Book Rooms180851822025-02-15 1:12:3644 hrs ago1739581956IN
0x32a20C3f...4b8501E5F
0 POL0.0114526330.13383228
Book Rooms180797512025-02-14 22:00:0047 hrs ago1739570400IN
0x32a20C3f...4b8501E5F
0 POL0.0120193631.625
Book Rooms180712972025-02-14 17:00:222 days ago1739552422IN
0x32a20C3f...4b8501E5F
0 POL0.0114014130
Book Rooms180697122025-02-14 16:04:142 days ago1739549054IN
0x32a20C3f...4b8501E5F
0 POL0.0169698644.65202567
Book Rooms180534252025-02-14 6:26:392 days ago1739514399IN
0x32a20C3f...4b8501E5F
0 POL0.0200867252.85160001
Book Rooms180354842025-02-13 18:51:413 days ago1739472701IN
0x32a20C3f...4b8501E5F
0 POL0.016406743.16882467
Book Rooms180271092025-02-13 13:54:373 days ago1739454877IN
0x32a20C3f...4b8501E5F
0 POL0.0132062234.74783274
Book Rooms180124972025-02-13 5:16:493 days ago1739423809IN
0x32a20C3f...4b8501E5F
0 POL0.0127129733.45
Book Rooms179986392025-02-12 21:05:054 days ago1739394305IN
0x32a20C3f...4b8501E5F
0 POL0.0159913942.07608011
Book Rooms179958572025-02-12 19:26:294 days ago1739388389IN
0x32a20C3f...4b8501E5F
0 POL0.0191896750.49129614
Book Rooms179919112025-02-12 17:06:414 days ago1739380001IN
0x32a20C3f...4b8501E5F
0 POL0.0175072246.06593992
Book Rooms179800402025-02-12 10:05:514 days ago1739354751IN
0x32a20C3f...4b8501E5F
0 POL0.0131386734.57118422
Book Rooms179792982025-02-12 9:39:334 days ago1739353173IN
0x32a20C3f...4b8501E5F
0 POL0.0122738632.2946301
Book Rooms179699922025-02-12 3:45:394 days ago1739331939IN
0x32a20C3f...4b8501E5F
0 POL0.0120193631.625
Book Rooms179599652025-02-11 21:18:455 days ago1739308725IN
0x32a20C3f...4b8501E5F
0 POL0.0186228949.00000001
Book Rooms179582982025-02-11 20:07:035 days ago1739304423IN
0x32a20C3f...4b8501E5F
0 POL0.0186228949.00000001
Book Rooms179287982025-02-11 1:45:575 days ago1739238357IN
0x32a20C3f...4b8501E5F
0 POL0.0228035460
Book Rooms179229172025-02-10 22:06:255 days ago1739225185IN
0x32a20C3f...4b8501E5F
0 POL0.0190029550
Book Rooms179219802025-02-10 21:30:315 days ago1739223031IN
0x32a20C3f...4b8501E5F
0 POL0.0228028260
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Contract Source Code Verified (Exact Match)

Contract Name:
BukProtocol

Compiler Version
v0.8.19+commit.7dd6d404

Optimization Enabled:
Yes with 10000 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 16 : BukProtocol.sol
// SPDX-License-Identifier: MIT
pragma solidity =0.8.19;

import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import { IBukPOSNFTs } from "../BukPOSNFTs/IBukPOSNFTs.sol";
import { IBukNFTs } from "../BukNFTs/IBukNFTs.sol";
import { IBukTreasury } from "../BukTreasury/IBukTreasury.sol";
import { ISignatureVerifier } from "../SignatureVerifier/ISignatureVerifier.sol";
import { IBukRoyalties } from "../BukRoyalties/IBukRoyalties.sol";
import { IBukProtocol } from "../BukProtocol/IBukProtocol.sol";

/**
 * @title BUK Protocol Contract
 * @author BUK Technology Inc
 * @dev Contract to manage operations of the BUK protocol to manage BukNFTs tokens and underlying sub-contracts.
 */
contract BukProtocol is ReentrancyGuard, IBukProtocol, Pausable {
    // Using safeERC20
    using SafeERC20 for IERC20;
    /**
     * @dev address _bukWallet        Address of the Buk wallet.
     * @dev address _stableToken          Address of the stable token.
     * @dev address _bukTreasury          Address of the Buk treasury contract.
     * @dev address nftContract Address of the Buk NFT contract.
     * @dev address nftPOSContract  Address of the Buk NFT POS Contract.
     * @dev address royaltiesContract  Address of the Buk Royalties Contract.
     */
    address private _admin;
    address private _bukWallet;
    IERC20 private _stableToken;
    IBukTreasury private _bukTreasury;
    ISignatureVerifier private _signatureVerifier;
    IBukNFTs private _nftContract;
    IBukPOSNFTs private _nftPOSContract;
    IBukRoyalties private _royaltiesContract;

    /// @dev Commission charged on bookings.
    uint256 public commission = 5;

    /// @dev Counters.Counter bookingIds    Counter for booking IDs.
    uint256 private _bookingIds;

    /// @dev Max booking limit per transaction.
    uint256 public constant MAX_BOOKING_LIMIT = 11;

    /**
     * @dev mapping(uint256 => Booking) _bookingDetails   Mapping of booking IDs to booking details.
     */
    mapping(uint256 => Booking) private _bookingDetails; //bookingID -> Booking Details

    /**
     * @dev Modifier onlyAdmin
     * Ensures that the function can only be accessed by the admin.
     * Throws an exception with a custom error message if the calling address is not the admin.
     */
    modifier onlyAdmin() {
        require(
            (msg.sender == _admin),
            "Only admin has access to this function"
        );
        _;
    }

    /**
     * @dev Constructor to initialize the contract
     * @param _bukTreasuryContract Address of the treasury.
     * @param _stableTokenAddr Address of the stable token.
     * @param _bukWalletAddr Address of the Buk wallet.
     * @param _signVerifierContract Address of the signature verifier contract.
     * @param _royaltiesContractAddr Address of the Buk royalties contract.
     */
    constructor(
        address _bukTreasuryContract,
        address _stableTokenAddr,
        address _bukWalletAddr,
        address _signVerifierContract,
        address _royaltiesContractAddr
    ) {
        _setRoyaltiesContract(_royaltiesContractAddr);
        _setAdmin(msg.sender);
        _setBukTreasury(_bukTreasuryContract);
        _setStableToken(_stableTokenAddr);
        _setBukWallet(_bukWalletAddr);
        _setSignatureVerifier(_signVerifierContract);
    }

    /// @dev See {IBukProtocol-setAdmin}.
    function setAdmin(address _adminAddr) external onlyAdmin {
        _setAdmin(_adminAddr);
    }

    /// @dev See {IBukProtocol-setSignatureVerifier}.
    function setSignatureVerifier(
        address __signatureVerifier
    ) external onlyAdmin {
        _setSignatureVerifier(__signatureVerifier);
    }

    /// @dev See {IBukProtocol-setBukTreasury}.
    function setBukTreasury(address _bukTreasuryContract) external onlyAdmin {
        _setBukTreasury(_bukTreasuryContract);
    }

    /// @dev See {IBukProtocol-setBukWallet}.
    function setBukWallet(address _bukWalletAddr) external onlyAdmin {
        _setBukWallet(_bukWalletAddr);
    }

    /// @dev See {IBukProtocol-setStableToken}.
    function setStableToken(address _stableTokenAddress) external onlyAdmin {
        _setStableToken(_stableTokenAddress);
    }

    /// @dev See {IBukProtocol-setBukNFTs}.
    function setBukNFTs(address _nftContractAddr) external onlyAdmin {
        _nftContract = IBukNFTs(_nftContractAddr);
        emit SetBukNFTs(_nftContractAddr);
    }

    /// @dev See {IBukProtocol-setBukPosNFTs}.
    function setBukPOSNFTs(address _nftPOSContractAddr) external onlyAdmin {
        _nftPOSContract = IBukPOSNFTs(_nftPOSContractAddr);
        emit SetBukPOSNFTs(_nftPOSContractAddr);
    }

    /// @dev See {IBukProtocol-setRoyalties}.
    function setRoyaltiesContract(
        address _royaltiesContractAddr
    ) external onlyAdmin {
        _setRoyaltiesContract(_royaltiesContractAddr);
    }

    /// @dev See {IBukProtocol-setCommission}.
    function setCommission(
        uint256 _newCommission
    ) external onlyAdmin whenNotPaused {
        require(_newCommission <= 100, "Commission is more than 100");
        commission = _newCommission;
        emit SetCommission(_newCommission);
    }

    /// @dev See {IBukProtocol-toggleTradeability}.
    function toggleTradeability(uint256 _tokenId) external onlyAdmin {
        require(
            _bookingDetails[_tokenId].status != BookingStatus.nil,
            "Check the Booking status"
        );
        _bookingDetails[_tokenId].tradeable = !_bookingDetails[_tokenId]
            .tradeable;
        emit ToggleTradeability(_tokenId, _bookingDetails[_tokenId].tradeable);
    }

    /// @dev See {IBukProtocol-pause}.
    function pause() external onlyAdmin {
        _pause();
    }

    /// @dev See {IBukProtocol-unpause}.
    function unpause() external onlyAdmin {
        _unpause();
    }

    /// @dev See {IBukProtocol-bookRooms}.
    function bookRooms(
        uint256[] memory _total,
        uint256[] memory _baseRate,
        uint256[] memory _minSalePrice,
        uint256[] memory _adult,
        uint256[] memory _child,
        bytes32 _propertyId,
        uint256 _checkin,
        uint256 _checkout,
        uint256 _tradeTimeLimit,
        bool _tradeable
    ) external nonReentrant whenNotPaused returns (bool) {
        BookingList memory _params = BookingList(
            _total,
            _baseRate,
            _minSalePrice,
            _adult,
            _child,
            _propertyId,
            _checkin,
            _checkout,
            _tradeTimeLimit,
            _tradeable,
            msg.sender
        );
        (uint commissionTotal, uint256 total) = _booking(_params);
        return _bookingPayment(commissionTotal, total);
    }

    /// @dev See {IBukProtocol-bookRoomsOwner}.
    function bookRoomsOwner(
        uint256[] memory _total,
        uint256[] memory _baseRate,
        uint256[] memory _minSalePrice,
        uint256[] memory _adult,
        uint256[] memory _child,
        bytes32 _propertyId,
        uint256 _checkin,
        uint256 _checkout,
        uint256 _tradeTimeLimit,
        bool _tradeable,
        address _user
    ) external onlyAdmin nonReentrant whenNotPaused returns (bool) {
        BookingList memory _params = BookingList(
            _total,
            _baseRate,
            _minSalePrice,
            _adult,
            _child,
            _propertyId,
            _checkin,
            _checkout,
            _tradeTimeLimit,
            _tradeable,
            _user
        );
        _booking(_params);
        return true;
    }

    /// @dev See {IBukProtocol-bookingRefund}.
    function bookingRefund(
        uint256[] memory _ids,
        address _owner
    ) external whenNotPaused onlyAdmin nonReentrant {
        uint256 len = _ids.length;
        require((len > 0), "Array is empty");
        for (uint256 i = 0; i < len; ++i) {
            require(
                _bookingDetails[_ids[i]].firstOwner == _owner,
                "Check the booking owner"
            );
            require(
                _bookingDetails[_ids[i]].status == BookingStatus.booked,
                "Check the Booking status"
            );
        }
        uint total;
        for (uint256 i = 0; i < len; ++i) {
            _bookingDetails[_ids[i]].status = BookingStatus.cancelled;
            total +=
                _bookingDetails[_ids[i]].total +
                _bookingDetails[_ids[i]].commission;
        }
        _bukTreasury.stableRefund(total, _owner);
        (total, _owner);
        emit BookingRefund(total, _owner);
    }

    /// @dev See {IBukProtocol-mintBukNFTOwner}.
    function mintBukNFTOwner(
        uint256[] memory _ids,
        string[] memory _uri,
        address _user
    ) external whenNotPaused nonReentrant onlyAdmin {
        _mintBukNFT(_ids, _uri, _user);
    }

    /// @dev See {IBukProtocol-checkin}.
    function checkin(uint256[] memory _ids) external {
        uint256 len = _ids.length;
        for (uint256 i = 0; i < len; ++i) {
            require(
                (_admin == msg.sender) ||
                    (_nftContract.balanceOf(msg.sender, _ids[i]) > 0),
                "Admin or NFT owner can access booking"
            );
            require(
                _bookingDetails[_ids[i]].status == BookingStatus.confirmed,
                "Check the Booking status"
            );
        }
        require(
            ((len > 0) && (len < MAX_BOOKING_LIMIT)),
            "Not in max-min booking limit"
        );
        for (uint256 i = 0; i < len; ++i) {
            _bookingDetails[_ids[i]].status = BookingStatus.checkedin;
            _bookingDetails[_ids[i]].tradeable = false;
        }
        emit CheckinRooms(_ids, true);
    }

    /// @dev See {IBukProtocol-checkout}.
    function checkout(
        uint256[] memory _ids,
        address[] memory _recipients
    ) external onlyAdmin whenNotPaused {
        uint256 len = _ids.length;
        require(
            ((len > 0 && _recipients.length > 0) &&
                (len == _recipients.length) &&
                (len < MAX_BOOKING_LIMIT)),
            "Not in max-min booking limit"
        );
        for (uint256 i = 0; i < len; ++i) {
            require(
                _bookingDetails[_ids[i]].status == BookingStatus.checkedin,
                "Check the Booking status"
            );
            require(
                (_bookingDetails[_ids[i]].checkout < block.timestamp),
                "Checkout date must be before today"
            );
            require(
                (_nftContract.balanceOf(_recipients[i], _ids[i]) > 0),
                "Check NFT owner balance"
            );
        }
        for (uint256 i = 0; i < len; ++i) {
            _bookingDetails[_ids[i]].status = BookingStatus.checkedout;
            _bookingDetails[_ids[i]].tradeable = false;
            _nftContract.burn(_recipients[i], _ids[i], 1, true);
        }
        emit CheckoutRooms(_ids, true);
    }

    /// @dev See {IBukProtocol-cancelRooms}.
    function cancelRooms(
        uint256[] memory _ids,
        uint256[] memory _penalties,
        uint256[] memory _refunds,
        uint256[] memory _charges,
        address _bookingOwner,
        bytes memory _signature
    ) external whenNotPaused onlyAdmin nonReentrant {
        uint256 len = _ids.length;
        require(
            (len == _penalties.length) && (len == _refunds.length),
            "Validate IDs and amounts"
        );
        uint totalPenalty;
        uint totalRefund;
        uint totalCharges;
        for (uint256 i = 0; i < len; ++i) {
            require(
                ((_bookingDetails[_ids[i]].status == BookingStatus.confirmed) ||
                    (_bookingDetails[_ids[i]].status ==
                        BookingStatus.checkedin)),
                "Not a confirmed or checkedin Booking"
            );
            require(
                (_bookingDetails[_ids[i]].checkin > block.timestamp),
                "Checkin date must be in the future"
            );
            require(
                _nftContract.balanceOf(_bookingOwner, _ids[i]) > 0,
                "Check the booking owner balance"
            );
            require(
                ((_penalties[i] + _refunds[i] + _charges[i]) <
                    (_bookingDetails[_ids[i]].total + 1)),
                "Transfer amount exceeds total"
            );
            totalPenalty += _penalties[i];
            totalRefund += _refunds[i];
            totalCharges += _charges[i];
        }
        // Verify the signature using the generateAndVerify function
        address signer = _signatureVerifier.generateAndVerify(
            totalPenalty,
            totalRefund,
            totalCharges,
            _signature
        );
        require(signer == _bookingOwner, "Invalid owner signature");
        for (uint256 i = 0; i < len; ++i) {
            _bookingDetails[_ids[i]].status = BookingStatus.cancelled;
            _nftContract.burn(_bookingOwner, _ids[i], 1, false);
        }
        if (totalPenalty > 0)
            _bukTreasury.stableRefund(totalPenalty, _bukWallet);
        if (totalRefund > 0)
            _bukTreasury.stableRefund(totalRefund, _bookingOwner);
        if (totalCharges > 0)
            _bukTreasury.stableRefund(totalCharges, _bukWallet);
        emit CancelRoom(_ids, totalRefund, true);
    }

    /// @dev See {IBukProtocol-emergencyCancellation}.
    function emergencyCancellation(
        uint256 _id,
        uint256 _refund,
        uint256 _charges,
        address _bookingOwner
    ) external whenNotPaused onlyAdmin nonReentrant {
        require(
            ((_bookingDetails[_id].status == BookingStatus.confirmed) ||
                (_bookingDetails[_id].status == BookingStatus.checkedin)),
            "Not a confirmed or checkedin Booking"
        );
        require(
            (_bookingDetails[_id].checkin > block.timestamp),
            "Checkin date must be in the future"
        );
        require(
            _nftContract.balanceOf(_bookingOwner, _id) > 0,
            "Check the booking owner"
        );
        require(
            ((_refund + _charges) <
                (_bookingDetails[_id].total +
                    _bookingDetails[_id].commission +
                    1)),
            "Transfer amount exceeds total"
        );
        _bookingDetails[_id].status = BookingStatus.cancelled;
        _bukTreasury.stableRefund(_refund, _bookingOwner);
        _bukTreasury.stableRefund(_charges, _bukWallet);
        _nftContract.burn(_bookingOwner, _id, 1, false);
        emit EmergencyCancellation(_id, true);
    }

    /// @dev See {IBukProtocol-getBookingDetails}.
    function getBookingDetails(
        uint256 _tokenId
    ) external view returns (Booking memory) {
        return _bookingDetails[_tokenId];
    }

    /// @dev See {IBukProtocol-getRoyaltyInfo}.
    function getRoyaltyInfo(
        uint256 _tokenId
    ) external view returns (IBukRoyalties.Royalty[] memory) {
        IBukRoyalties.Royalty[] memory royalties = _royaltiesContract
            .getRoyaltyInfo(_tokenId);
        return royalties;
    }

    /// @dev See {IBukProtocol-getWallets}.
    function getWallets()
        external
        view
        returns (
            address nftContract,
            address nftPOSContract,
            address royaltiesContract,
            address signatureVerifier,
            address bukTreasury,
            address stableToken,
            address bukWallet,
            address admin
        )
    {
        return (
            address(_nftContract),
            address(_nftPOSContract),
            address(_royaltiesContract),
            address(_signatureVerifier),
            address(_bukTreasury),
            address(_stableToken),
            address(_bukWallet),
            address(_admin)
        );
    }

    /**
     * Private function to set the Admin Wallet address
     * @param _adminAddr The address of the Admin Wallet
     */
    function _setAdmin(address _adminAddr) private {
        require(_adminAddr != address(0), "Invalid address");
        _admin = _adminAddr;
        emit SetAdminWallet(_adminAddr);
    }

    /**
     * Private function to set the Signature Verifier contract address
     * @param _signatureVerifierContract The address of the Signature Verifier contract
     */
    function _setSignatureVerifier(address _signatureVerifierContract) private {
        _signatureVerifier = ISignatureVerifier(_signatureVerifierContract);
        emit SetSignerVerifier(_signatureVerifierContract);
    }

    /**
     * Private function to set the Royalty contract address
     * @param _royaltiesContractAddr The address of the Royalties contract
     */
    function _setRoyaltiesContract(address _royaltiesContractAddr) private {
        _royaltiesContract = IBukRoyalties(_royaltiesContractAddr);
        emit SetRoyaltiesContract(_royaltiesContractAddr);
    }

    /**
     * Private function to set the BukTreasury contract address
     * @param _bukTreasuryContract The address of the BukTreasury contract
     */
    function _setBukTreasury(address _bukTreasuryContract) private {
        require(_bukTreasuryContract != address(0), "Invalid address");
        _bukTreasury = IBukTreasury(_bukTreasuryContract);
        emit SetBukTreasury(_bukTreasuryContract);
    }

    /**
     * Private function to set the BukWallet contract address
     * @param _bukWalletAddr The address of the BukWallet contract
     */
    function _setBukWallet(address _bukWalletAddr) private {
        require(_bukWalletAddr != address(0), "Invalid address");
        _bukWallet = _bukWalletAddr;
        emit SetBukWallet(_bukWalletAddr);
    }

    /**
     * Private function to set the stable token contract address
     * @param _stableTokenAddress The address of the stable token contract
     */
    function _setStableToken(address _stableTokenAddress) private {
        require(_stableTokenAddress != address(0), "Invalid address");
        _stableToken = IERC20(_stableTokenAddress);
        emit SetStableToken(_stableTokenAddress);
    }

    /**
     * @dev Function to do the booking payment.
     * @param _commission Total BUK commission.
     * @param _total Total Booking Charge Excluding BUK commission.
     */
    function _bookingPayment(
        uint256 _commission,
        uint256 _total
    ) private returns (bool) {
        require(
            _stableToken.balanceOf(msg.sender) >= _total + _commission,
            "Insufficient balance for booking"
        );

        _stableToken.safeTransferFrom(msg.sender, _bukWallet, _commission);
        _stableToken.safeTransferFrom(
            msg.sender,
            address(_bukTreasury),
            _total
        );
        return true;
    }

    /**
     * Function to capture booking details.
     * @param _bookingData It contains the booking details.
     * @return commissionTotal Total BUK commission.
     */
    function _booking(
        BookingList memory _bookingData
    ) private returns (uint, uint256) {
        require(
            ((_bookingData.total.length == _bookingData.baseRate.length) &&
                (_bookingData.total.length ==
                    _bookingData.minSalePrice.length) &&
                (_bookingData.total.length > 0)),
            "Array sizes mismatch"
        );
        require(
            _bookingData.total.length <= MAX_BOOKING_LIMIT,
            "Exceeded max rooms per booking"
        );
        require(
            (_bookingData.checkIn > block.timestamp),
            "Checkin date must be in the future"
        );
        require(
            (_bookingData.checkOut > _bookingData.checkIn),
            "Checkout date must be after checkin"
        );
        uint256 totalAmount;
        uint commissionTotal;
        for (uint256 i = 0; i < _bookingData.total.length; ++i) {
            ++_bookingIds;
            uint256 bukCommission = (_bookingData.baseRate[i] * commission) /
                100;
            _bookingDetails[_bookingIds] = Booking(
                _bookingIds,
                0,
                _bookingData.propertyId,
                BookingStatus.booked,
                _bookingData.adult[i],
                _bookingData.child[i],
                _bookingData.user,
                _bookingData.checkIn,
                _bookingData.checkOut,
                _bookingData.total[i],
                _bookingData.baseRate[i],
                bukCommission,
                _bookingData.minSalePrice[i],
                _bookingData.tradeTimeLimit,
                _bookingData.tradeable
            );
            totalAmount += _bookingData.total[i];
            commissionTotal += bukCommission;
            emit BookRoom(
                _bookingIds,
                _bookingData.propertyId,
                _bookingData.checkIn,
                _bookingData.checkOut,
                _bookingData.adult[i],
                _bookingData.child[i]
            );
        }
        return (commissionTotal, totalAmount);
    }

    /// @dev See {IBukProtocol-mintBukNFT}.
    function _mintBukNFT(
        uint256[] memory _ids,
        string[] memory _uri,
        address _user
    ) private {
        uint256 len = _ids.length;
        require((len == _uri.length), "Check Ids and URIs size");
        require(((len > 0) && (len < 11)), "Not in max - min booking limit");
        for (uint256 i = 0; i < len; ++i) {
            require(
                _bookingDetails[_ids[i]].status == BookingStatus.booked,
                "Check the Booking status"
            );
            require(
                _bookingDetails[_ids[i]].firstOwner == _user,
                "Only booking owner can mint"
            );
        }
        for (uint256 i = 0; i < len; ++i) {
            _bookingDetails[_ids[i]].status = BookingStatus.confirmed;
            _nftContract.mint(
                _ids[i],
                _bookingDetails[_ids[i]].firstOwner,
                1,
                "",
                _uri[i]
            );
            _bookingDetails[_ids[i]].tokenId = _ids[i];
        }
        emit MintedBookingNFT(_ids, true);
    }
}

File 2 of 16 : Pausable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

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

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

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

    bool private _paused;

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

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

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

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

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

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

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

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

File 3 of 16 : ReentrancyGuard.sol
// 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;
    }
}

File 4 of 16 : IERC1155.sol
// 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;
}

File 5 of 16 : IERC20Permit.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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.
 */
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].
     */
    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);
}

File 6 of 16 : IERC20.sol
// 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);
}

File 7 of 16 : SafeERC20.sol
// 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));
    }
}

File 8 of 16 : Address.sol
// 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);
        }
    }
}

File 9 of 16 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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;
    }
}

File 10 of 16 : IERC165.sol
// 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);
}

File 11 of 16 : IBukNFTs.sol
// SPDX-License-Identifier: MIT
pragma solidity =0.8.19;

import { IERC1155 } from "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";

/**
 * @title Interface to define the BUK NFTs
 * @author BUK Technology Inc
 * @dev Collection of all procedures related to the BUK NFTs.
 */
interface IBukNFTs is IERC1155 {
    /// @dev Emitted when Buk Protocol Address is updated.
    event SetBukProtocol(
        address oldBukProtocolContract,
        address newBukProtocolContract
    );

    /// @dev Emitted when treasury is updated.
    event SetBukTreasury(
        address oldTreasuryContract,
        address newTreasuryContract
    );

    /// @dev Emitted when marketplace role is granted.
    event SetMarketplace(address marketplaceContract);

    /// @dev Event to set NFT contract role
    event SetNFTPOSContractRole(
        address oldNFTPOSContractAddr,
        address newNFTPOSContractAddr
    );

    /// @dev Event to set token URI
    event SetURI(uint256 id, string oldUri, string newUri);

    /**
     * @dev Function to set the Buk Protocol Contract address.
     * @param _bukProtocolContract Address of the Buk Protocol Contract.
     * @notice This function can only be called by addresses with `ADMIN_ROLE`
     */
    function setBukProtocol(address _bukProtocolContract) external;

    /**
     * @dev Function to set the treasury address.
     * @param _bukTreasuryContract Address of the treasury.
     * @notice This function can only be called by addresses with `ADMIN_ROLE`
     */
    function setBukTreasury(address _bukTreasuryContract) external;

    /**
     * @dev Function to set the marketplace address.
     * @param _marketplaceContract Address of the marketplace.
     * @notice This function can only be called by addresses with `ADMIN_ROLE`
     */
    function setMarketplaceRole(address _marketplaceContract) external;

    /**
     * @dev Function to set the BukPOSNFT to the contract
     * @param _nftPOSContract address: The address of the NFT contract
     * @notice This function can only be called by a contract with `ADMIN_ROLE`
     */
    function setBukPOSNFTRole(address _nftPOSContract) external;

    /**
     * @dev Sets the URI for a specific token ID.
     * @param _id - The ID of the token.
     * @param _newuri - The new URI for the token.
     * @notice This function can only be called by a contract with `ADMIN_ROLE`
     */
    function setURI(uint256 _id, string memory _newuri) external;

    /**
     * @dev Mint a new NFT with a specific token ID, account, amount, and data.
     * @param _id - The token ID to mint the NFT with.
     * @param _account - The account to mint the NFT to.
     * @param _amount - The amount of NFTs to mint.
     * @param _data - The data to store with the NFT.
     * @param _uri - The URI to associate with the NFT.
     * @return uint256 - The token ID of the newly minted NFT.
     * @notice This function can only be called by a contract with `BUK_PROTOCOL_ROLE`
     */
    function mint(
        uint256 _id,
        address _account,
        uint256 _amount,
        bytes calldata _data,
        string calldata _uri
    ) external returns (uint256);

    /**
     * @dev Burn a specific NFT.
     * @param _account - The account to burn the NFT from.
     * @param _id - The token ID of the NFT to burn.
     * @param _amount - The amount of NFTs to burn.
     * @param _mintPOS - Whether or not to call the Buk POS NFTs contract to burn the NFT.
     * @notice This function can only be called by a contract with `BUK_PROTOCOL_ROLE`
     */
    function burn(
        address _account,
        uint256 _id,
        uint256 _amount,
        bool _mintPOS
    ) external;

    /**
     * @dev Transfers ownership of an NFT token from one address to another.
     * @param _from - The current owner of the NFT.
     * @param _to - The address to transfer the ownership to.
     * @param _id - The ID of the NFT token.
     * @param _amount - Count of ERC1155 token of token ID.
     * @param _data - Additional data to include in the transfer.
     * @notice This function checks if the NFT is tranferable or not.
     * @notice This function can only be called by a contract with `MARKETPLACE_CONTRACT_ROLE`
     */
    function safeTransferFrom(
        address _from,
        address _to,
        uint256 _id,
        uint256 _amount,
        bytes memory _data
    ) external;

    /**
     * @dev Transfers ownership of multiple NFT tokens from one address to another.
     * @param _from - The current owner of the NFTs.
     * @param _to - The address to transfer the ownership to.
     * @param _ids - The IDs of the NFT tokens.
     * @param _amounts - Count of ERC1155 tokens of the respective token IDs.
     * @param _data - Additional data to include in the transfer.
     * @notice This function checks if the NFTs are tranferable or not.
     * @notice This function can only be called by a contract with `MARKETPLACE_CONTRACT_ROLE`
     */
    function safeBatchTransferFrom(
        address _from,
        address _to,
        uint256[] memory _ids,
        uint256[] memory _amounts,
        bytes memory _data
    ) external;

    /**
     * @dev To retrieve information about the royalties associated with a specific token.
     * @param _tokenId - The token ID of the NFT.
     * @param _salePrice - The price at which the token is being sold.
     * @return receiver - The address of the royalty receiver.
     * @return royaltyAmount - The amount of royalty to be paid.
     */
    function royaltyInfo(
        uint256 _tokenId,
        uint256 _salePrice
    ) external view returns (address receiver, uint256 royaltyAmount);

    /**
     * @dev Returns the URI associated with the token ID.
     * @param _id - The token ID to retrieve the URI for.
     * @return string - The URI associated with the token ID.
     */
    function uri(uint256 _id) external view returns (string memory);
}

File 12 of 16 : IBukPOSNFTs.sol
// SPDX-License-Identifier: MIT
pragma solidity =0.8.19;

import { IERC1155 } from "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";

/**
 * @title Interface to define the BUK POS NFTs
 * @author BUK Technology Inc
 * @dev Collection of all procedures related to the BUK Proof of Stay NFTs.
 */
interface IBukPOSNFTs is IERC1155 {
    /// @dev Emitted when Buk Protocol Address is updated.
    event SetBukProtocol(
        address oldBukProtocolContract,
        address newBukProtocolContract
    );

    /// @dev Emitted when treasury is updated.
    event SetBukTreasury(
        address oldTreasuryContract,
        address newTreasuryContract
    );

    /// @dev Event to update the contract name
    event SetNFTContractName(string oldContractName, string newContractName);

    /// @dev Event to set NFT contract role
    event SetNFTContractRole(
        address oldNFTContractAddr,
        address newNFTContractAddr
    );

    /// @dev Event to set token URI
    event SetURI(uint id, string oldUri, string newUri);

    /**
     * @dev Function to update the Buk Protocol Contract address.
     * @param _bukProtocolContract Address of the Buk Protocol Contract.
     * @notice This function can only be called by addresses with `ADMIN_ROLE`
     */
    function setBukProtocol(address _bukProtocolContract) external;

    /**
     * @dev Function to update the treasury address.
     * @param _bukTreasuryContract Address of the treasury.
     * @notice This function can only be called by addresses with `ADMIN_ROLE`
     */
    function setBukTreasury(address _bukTreasuryContract) external;

    /**
     * @dev Function to set the BukNFT role to a given contract
     * @param _nftContract address: The address of the NFT contract
     * @notice This function can only be called by a contract with `ADMIN_ROLE`
     */
    function setBukNFTRole(address _nftContract) external;

    /**
     * @dev Function to set the contract name
     * @notice This function can only be called by a contract with `BUK_NFT_CONTRACT_ROLE`
     */
    function setNFTContractName(string memory _contractName) external;

    /**
     * @dev Function to set the URI for a given ID
     * @param _id uint256: The ID of the token
     * @param _newuri string: The new URI of the token
     * @notice This function can only be called by a contract with `BUK_NFT_CONTRACT_ROLE`
     */
    function setURI(uint256 _id, string memory _newuri) external;

    /**
     * @dev Function to mint tokens
     * @param _account address: The address to which the tokens will be minted
     * @param _id uint256: The ID of the token
     * @param _amount uint256: The amount of tokens to be minted
     * @param _newuri string: The URI of the token
     * @param _data bytes: Additional data associated with the token
     * @notice This function can only be called by a contract with `BUK_NFT_CONTRACT_ROLE`
     */
    function mint(
        address _account,
        uint256 _id,
        uint256 _amount,
        string calldata _newuri,
        bytes calldata _data
    ) external;

    /**
     * @dev Transfers ownership of an NFT token from one address to another.
     * @param _from - The current owner of the NFT.
     * @param _to - The address to transfer the ownership to.
     * @param _id - The ID of the NFT token.
     * @param _amount - The amount of NFTs to mint.
     * @param _data - Additional data to include in the transfer.
     * @notice This function checks if the NFT is tranferable or not.
     * @notice This function can only be called by a contract with `ADMIN_ROLE`
     */
    function safeTransferFrom(
        address _from,
        address _to,
        uint256 _id,
        uint256 _amount,
        bytes memory _data
    ) external;

    /**
     * @dev Transfers ownership of multiple NFT tokens from one address to another.
     * @param _from - The current owner of the NFTs.
     * @param _to - The address to transfer the ownership to.
     * @param _ids - The IDs of the NFT tokens.
     * @param _amounts - Count of ERC1155 tokens of the respective token IDs.
     * @param _data - Additional data to include in the transfer.
     * @notice This function checks if the NFTs are tranferable or not.
     * @notice This function can only be called by a contract with `ADMIN_ROLE`
     */
    function safeBatchTransferFrom(
        address _from,
        address _to,
        uint256[] memory _ids,
        uint256[] memory _amounts,
        bytes memory _data
    ) external;

    /**
     * @dev Function to get the URI for a given ID
     * @param _id uint256: The ID of the token
     */
    function uri(uint256 _id) external view returns (string memory);
}

File 13 of 16 : IBukProtocol.sol
// SPDX-License-Identifier: MIT
pragma solidity =0.8.19;
import { IBukRoyalties } from "../BukRoyalties/IBukRoyalties.sol";

/**
 * @title Interface to define the BUK protocol
 * @author BUK Technology Inc
 * @dev Collection of all procedures related to the BUK protocol
 * @dev This interface is used by the other child contract to interact with the BukProtocol contract.
 */
interface IBukProtocol {
    /**
     * @dev Enum for booking statuses.
     * @var BookingStatus.nil         Booking has not yet been initiated.
     * @var BookingStatus.booked      Booking has been initiated but not yet confirmed.
     * @var BookingStatus.confirmed   Booking has been confirmed.
     * @var BookingStatus.cancelled   Booking has been cancelled.
     * @var BookingStatus.checkedin   Booking has been checked-in.
     * @var BookingStatus.checkedout  Booking has been checked-out.
     */
    enum BookingStatus {
        nil,
        booked,
        confirmed,
        cancelled,
        checkedin,
        checkedout
    }

    /**
     * @dev Struct for booking details.
     * @param uint256 id                Booking ID.
     * @param uint256 tokenId           Token ID.
     * @param bytes32 propertyId        Property ID.
     * @param BookingStatus status      Booking status.
     * @param uint256 adult[]             Number of adults.
     * @param uint256 child[]             Number of children.
     * @param address owner             Address of the booking owner.
     * @param uint256 checkin           Check-in date.
     * @param uint256 checkout          Check-out date.
     * @param uint256 total             Total price.
     * @param uint256 baseRate          Base rate.
     * @param uint256 commission        Buk commission.
     * @param uint256 minSalePrice      Min Sale Price.
     * @param uint256 tradeTimeLimit    Buy will excecute if tradeLimitTime is not crossed (in hours)
     * @param bool tradeable            Is the NFT Tradeable.
     */
    struct Booking {
        uint256 id;
        uint256 tokenId;
        bytes32 propertyId;
        BookingStatus status;
        uint256 adult;
        uint256 child;
        address firstOwner;
        uint256 checkin;
        uint256 checkout;
        uint256 total;
        uint256 baseRate;
        uint256 commission;
        uint256 minSalePrice;
        uint256 tradeTimeLimit;
        bool tradeable;
    }

    /**
     * @dev Struct for booking details.
     * @param uint256 total             Total price.
     * @param uint256 baseRate          Base rate.
     * @param uint256 minSalePrice      Min Sale Price.
     * @param uint256 adult[]             Number of adults.
     * @param uint256 child[]             Number of children.
     * @param bytes32 propertyId        Property ID.
     * @param uint256 checkin           Check-in date.
     * @param uint256 checkout          Check-out date.
     * @param uint256 tradeTimeLimit    Buy will excecute if tradeLimitTime is not crossed (in hours)
     * @param bool tradeable            Is the NFT Tradeable.
     * @param address user             Address of the booking owner.
     */
    struct BookingList {
        uint256[] total;
        uint256[] baseRate;
        uint256[] minSalePrice;
        uint256[] adult;
        uint256[] child;
        bytes32 propertyId;
        uint256 checkIn;
        uint256 checkOut;
        uint256 tradeTimeLimit;
        bool tradeable;
        address user;
    }

    /// @dev Emitted when the admin wallet is set.
    event SetAdminWallet(address newAdminWallet);

    /// @dev Emitted when the commission is set.
    event SetCommission(uint256 newCommission);

    /// @dev Emitted when BukNFTs contract address is updated.
    event SetBukNFTs(address newNFTContract);

    /// @dev Emitted when BukPOSNFTs contract address is updated.
    event SetBukPOSNFTs(address newNFTPOSContract);

    /// @dev Emitted when BukRoyalties contract address is updated.
    event SetRoyaltiesContract(address newRoyaltiesContract);

    /// @dev Emitted when signer verifier is updated.
    event SetSignerVerifier(address newSignerVerifier);

    /// @dev Emitted when Buk treasury is updated.
    event SetBukTreasury(address newTreasuryContract);

    /// @dev Emitted when Buk Wallet is updated.
    event SetBukWallet(address newBukWalletContract);

    /// @dev Emitted when stable token is updated.
    event SetStableToken(address newStableToken);

    /**
     * @dev Emitted when the tradeability of a Buk NFT is toggled.
     * @param tokenId Token Id whose tradeability is being toggled.
     * @param tradeable Is the NFT tradeable.
     */
    event ToggleTradeability(uint256 indexed tokenId, bool indexed tradeable);

    /// @dev Emitted when single room is booked.
    event BookRoom(
        uint256 indexed booking,
        bytes32 indexed propertyId,
        uint256 checkin,
        uint256 checkout,
        uint256 adult,
        uint256 child
    );

    /// @dev Emitted when booking refund is done.
    event BookingRefund(uint256 total, address owner);

    /// @dev Emitted when room bookings are confirmed.
    event MintedBookingNFT(uint256[] bookings, bool status);

    /// @dev Emitted when room bookings are checked in.
    event CheckinRooms(uint256[] bookings, bool status);

    /// @dev Emitted when room bookings are checked out.
    event CheckoutRooms(uint256[] bookings, bool status);

    /// @dev Emitted when room bookings are cancelled.
    event CancelRoom(
        uint256[] bookingIds,
        uint256 indexed total,
        bool indexed status
    );

    /// @dev Emitted when room bookings are cancelled.
    event EmergencyCancellation(uint256 indexed bookingId, bool indexed status);

    /**
     * @dev Sets the admin wallet address.
     * @param _adminAddr The new admin wallet address to be set.
     * @notice This function can only be called by admin
     */
    function setAdmin(address _adminAddr) external;

    /**
     * @dev This function is used to set the address of the signature verifier contract.
     * @param _signatureVerifier The address of the signature verifier contract.
     * @notice This function can only be called by admin
     */
    function setSignatureVerifier(address _signatureVerifier) external;

    /**
     * @dev Function to update the treasury address.
     * @param _bukTreasuryContract Address of the treasury.
     * @notice This function can only be called by admin
     */
    function setBukTreasury(address _bukTreasuryContract) external;

    /**
     * @dev Function to update the Buk Wallet address to collect commission.
     * @param _bukWalletContract Address of the Buk Wallet.
     * @notice This function can only be called by admin
     */
    function setBukWallet(address _bukWalletContract) external;

    /**
     * @dev Function to update the stable token address.
     * @param _stableToken Address of the stable token contract.
     * @notice This function can only be called by admin
     */
    function setStableToken(address _stableToken) external;

    /**
     * @dev Function to update the BukNFTs contract address.
     * @param _nftContractAddr Address of the BukNFTs contract.
     * @notice This function can only be called by admin
     */
    function setBukNFTs(address _nftContractAddr) external;

    /**
     * @dev Function to update the BukPOSNFTs contract address.
     * @param _nftPOSContractAddr Address of the BukPOSNFTs contract.
     * @notice This function can only be called by admin
     */
    function setBukPOSNFTs(address _nftPOSContractAddr) external;

    /**
     * @dev Sets the Buk royalties contract address.
     * Can only be called by accounts with the ADMIN_ROLE.
     * @param _royaltiesContract The new royaltiesContract address to set.
     * @notice This function updates the royaltiesContract address and emits an event.
     * @dev If {_royaltiesContract} is the zero address, the function will revert.
     * @dev Emits a {SetRoyaltiesContract} event with the previous royaltiesContract address and the new address.
     */
    function setRoyaltiesContract(address _royaltiesContract) external;

    /**
     * @dev Function to set the Buk commission percentage.
     * @param _commission Commission percentage.
     * @notice This function can only be called by admin
     */
    function setCommission(uint256 _commission) external;

    /**
     * @dev Function to toggle the tradeability of an asset.
     * @param _tokenId Token Id whose tradeability is being toggled.
     * @notice This function can only be called by admin
     */
    function toggleTradeability(uint256 _tokenId) external;

    /**
     * @dev Function to pause the contract.
     * @notice This function can only be called by admin
     */
    function pause() external;

    /**
     * @dev Function to unpause the contract.
     * @notice This function can only be called by admin
     */
    function unpause() external;

    /**
     * @dev Function to book rooms.
     * @param _total Total amount to be paid.
     * @param _baseRate Base rate of the room.
     * @param _minSalePrice Minimum sale price for the booking.
     * @param _adult Number of adults.
     * @param _child Number of children.
     * @param _propertyId Property ID.
     * @param _checkin Checkin date.
     * @param _checkout Checkout date.
     * @param _tradeTimeLimit Trade Limit of NFT based on Checkin time.
     * @param _tradeable Is the booking NFT tradeable.
     * @return ids IDs of the bookings.
     */
    function bookRooms(
        uint256[] memory _total,
        uint256[] memory _baseRate,
        uint256[] memory _minSalePrice,
        uint256[] memory _adult,
        uint256[] memory _child,
        bytes32 _propertyId,
        uint256 _checkin,
        uint256 _checkout,
        uint256 _tradeTimeLimit,
        bool _tradeable
    ) external returns (bool);

    /**
     * @dev Function to book rooms.
     * @param _total Total amount to be paid.
     * @param _baseRate Base rate of the room.
     * @param _minSalePrice Minimum sale price for the booking.
     * @param _adult Number of adults.
     * @param _child Number of children.
     * @param _propertyId Property ID.
     * @param _checkin Checkin date.
     * @param _checkout Checkout date.
     * @param _tradeTimeLimit Trade Limit of NFT based on Checkin time.
     * @param _tradeable Is the booking NFT tradeable.
     * @param _user Address of user which we are booking.
     * @return ids IDs of the bookings.
     * @notice This function can only be called by admin
     * @notice This function is used to book rooms on behalf of the user.
     */
    function bookRoomsOwner(
        uint256[] memory _total,
        uint256[] memory _baseRate,
        uint256[] memory _minSalePrice,
        uint256[] memory _adult,
        uint256[] memory _child,
        bytes32 _propertyId,
        uint256 _checkin,
        uint256 _checkout,
        uint256 _tradeTimeLimit,
        bool _tradeable,
        address _user
    ) external returns (bool);

    /**
     * @dev Allows the admin to refund a booking by canceling it and transferring the amount to the owner.
     * @param _ids An array of booking IDs that need to be refunded.
     * @param _owner The address of the owner of the bookings.
     * @notice This function is usually executed when the booking is unsuccessful from the hotel's end.
     * @notice This function can only be called by admin
     */
    function bookingRefund(uint256[] memory _ids, address _owner) external;

    /**
     * @dev Function to mint new BukNFT tokens based on the provided booking IDs and URIs.
     * @param _ids An array of booking IDs representing the unique identifier for each BukNFT token.
     * @param _uri An array of URIs corresponding to each booking ID, which will be associated with the Buk NFTs.
     * @param _user Address of user which we are minting.
     * @notice Only the owner of the booking can book the NFTs and confirm the rooms.
     * @notice The number of bookings and URIs should be same.
     * @notice The booking status should be booked to confirm it.
     * @notice The NFTs are minted to the owner of the booking.
     * @notice This function can only be called by admin
     */
    function mintBukNFTOwner(
        uint256[] memory _ids,
        string[] memory _uri,
        address _user
    ) external;

    /**
     * @dev Function to checkin the rooms.
     * @param _ids An array of booking IDs representing the unique identifier for each BukNFT token.
     * @notice The booking status should be confirmed to checkin it.
     * @notice Once checkedin the NFT becomes non-tradeable.
     * @notice This function can only be called by admin or the owner of the booking NFT
     */
    function checkin(uint256[] memory _ids) external;

    /**
     * @dev Function to checkout the rooms.
     * @param _ids IDs of the bookings.
     * @param _recipients Owner address of tokens of the bookings.
     * @notice Only the admin can checkout the rooms.
     * @notice The booking status should be checkedin to checkout it.
     * @notice The Active Booking NFTs are burnt from the owner's account.
     * @notice The Utility NFTs are minted to the owner of the booking.
     * @notice This function can only be called by admin
     * @notice POSR NFT will be minted to recipients address.
     */
    function checkout(
        uint256[] memory _ids,
        address[] memory _recipients
    ) external;

    /**
     * @dev Function to cancel the room bookings.
     * @param _ids Array of booking.
     * @param _penalties Array of penalty amount to be refunded.
     * @param _refunds Array of refund amount to be refunded.
     * @param _charges Array of charges amount to be deducted.
     * @param _bookingOwner Owner of the booking.
     * @notice Only the admin can cancel the rooms.
     * @notice The booking status should be confirmed to cancel it.
     * @notice The Active Booking NFTs are burnt from the owner's account.
     * @notice Buk commission is non-refundable.
     * @notice This function can only be called by admin
     */
    function cancelRooms(
        uint256[] memory _ids,
        uint256[] memory _penalties,
        uint256[] memory _refunds,
        uint256[] memory _charges,
        address _bookingOwner,
        bytes memory _signature
    ) external;

    /**
     * @dev Function to perform an emergency cancellation of a booking.
     * @param _id The ID of the booking to be cancelled.
     * @param _refund The amount to be refunded to the booking owner.
     * @param _charges The charges associated with the cancellation(if any).
     * @param _bookingOwner The address of the booking owner.
     * @notice This function can only be called by admin
     * @notice Total refund amount and charges should be less than or equal to the total amount (Total = total booking amount + buk commission).
     */
    function emergencyCancellation(
        uint256 _id,
        uint256 _refund,
        uint256 _charges,
        address _bookingOwner
    ) external;

    /**
     * Function to get wallet addresses
     * @return nftContract The address of the nft contract
     * @return nftPOSContract The address of the nftPOS contract
     * @return royaltiesContract The address of the royalties contract
     * @return signatureVerifier The address of the signature verifier contract
     * @return bukTreasury The address of the bukTreasury contract
     * @return stableToken The address of the stable token contract
     * @return bukWallet The address of the bukWallet contract
     * @return admin The address of the stable token contract
     */
    function getWallets()
        external
        view
        returns (
            address nftContract,
            address nftPOSContract,
            address royaltiesContract,
            address signatureVerifier,
            address bukTreasury,
            address stableToken,
            address bukWallet,
            address admin
        );

    /**
     * @dev To get the booking details
     * @param _tokenId ID of the booking.
     */
    function getBookingDetails(
        uint256 _tokenId
    ) external view returns (Booking memory);

    /**
     * @dev Function to retrieve royalty information.
     * @param _tokenId ID of the token
     * @notice Token ID and Booking ID are same.
     */
    function getRoyaltyInfo(
        uint256 _tokenId
    ) external view returns (IBukRoyalties.Royalty[] memory);
}

File 14 of 16 : IBukRoyalties.sol
// SPDX-License-Identifier: MIT
pragma solidity =0.8.19;

/**
 * @title Interface to define the BUK royalties.
 * @author BUK Technology Inc
 * @dev Collection of all functions related to the BUK Royalties.
 */
interface IBukRoyalties {
    /**
     * @dev Struct named Royalty to store royalty information.
     * @param address receiver           The address of the receiver who will receive the royalty
     * @param uint96 royaltyFraction     The fraction of the royalty to be paid, expressed as an unsigned 96-bit integer
     */
    struct Royalty {
        address receiver;
        uint96 royaltyFraction;
    }

    /**
     * @dev Emitted when new buk protocol address has been updated
     * @param oldBukProtocol, old buk protocol address
     * @param newBukProtocol, new buk protocol address
     */
    event SetBukProtocol(
        address oldBukProtocol,
        address newBukProtocol
    );

    /**
     * @dev Emitted when new Buk royalty has been updated
     * @param oldRoyalty, old buk royalty
     * @param newRoyalty, new buk royalty
     * @notice This event is used when Buk royalty is updated
     */
    event SetBukRoyalty(uint96 oldRoyalty, uint96 newRoyalty);

    /**
     * @dev Emitted when Hotel royalty has been updated
     * @param oldRoyalty, old buk royalty
     * @param newRoyalty, new buk royalty
     * @notice This event is used when Hotel royalty is updated
     */
    event SetHotelRoyalty(uint96 oldRoyalty, uint96 newRoyalty);

    /**
     * @dev Emitted when First Owner royalty has been updated
     * @param oldRoyalty, old buk royalty
     * @param newRoyalty, new buk royalty
     * @notice This event is used when First Owner royalty is updated
     */
    event SetFirstOwnerRoyalty(uint96 oldRoyalty, uint96 newRoyalty);

    /**
     * @dev Emitted when other royalties are updated
     * @param oldRoyalty, array of old royalties
     * @param newRoyalty, array od new royalties
     */
    event SetOtherRoyalties(uint96[] oldRoyalty, uint96[] newRoyalty);

    /**
     * @dev Sets the Buk Protocol address.
     * Can only be called by accounts with the ADMIN_ROLE.
     * @param _bukProtocolContract The new Buk Protocol address to set.
     * @dev If {_bukProtocolContract} is the zero address, the function will revert.
     * @dev Emits a {SetBukProtocol} event with the previous Buk Protocol address and the new address.
     * @notice This function updates the Buk Protocol address and emits an event.
     * @notice This function can only be called by `ADMIN_ROLE`
     */
    function setBukProtocolContract(address _bukProtocolContract) external;

    /**
     * @dev Function to define the royalty Fraction for Buk.
     * @param _recipient Recipient address.
     * @param _royaltyFraction Royalty Fraction.
     * @notice This function can only be called by `ADMIN_ROLE`
     */
    function setBukRoyaltyInfo(
        address _recipient,
        uint96 _royaltyFraction
    ) external;

    /**
     * @dev Function to define the royalty Fraction for Hotel.
     * @param _recipient Recipient address.
     * @param _royaltyFraction Royalty Fraction.
     * @notice This function can only be called by `ADMIN_ROLE`
     */
    function setHotelRoyaltyInfo(
        address _recipient,
        uint96 _royaltyFraction
    ) external;

    /**
     * @dev Function to define the royalty Fraction for the First Owners.
     * @param _royaltyFraction Royalty Fraction.
     * @notice This function can only be called by `ADMIN_ROLE`
     */
    function setFirstOwnerRoyaltyInfo(uint96 _royaltyFraction) external;

    /**
     * @dev Function to define the royalties.
     * @param _recipients Array of recipients of royalties
     * @param _royaltyFractions Array of percentages for each recipients in the _recipients[] order.
     * @notice This function can only be called by `ADMIN_ROLE`
     */
    function setOtherRoyaltyInfo(
        address[] memory _recipients,
        uint96[] memory _royaltyFractions
    ) external;

    /**
     * @dev Function to retrieve royalty information.
     * @param _tokenId ID of the token
     * @notice Token ID and Booking ID are same.
     */
    function getRoyaltyInfo(
        uint256 _tokenId
    ) external view returns (Royalty[] memory);
}

File 15 of 16 : IBukTreasury.sol
// SPDX-License-Identifier: MIT
pragma solidity =0.8.19;

/**
 * @title IBukTreasury
 * @dev Interface for the BukTreasury contract.
 */
interface IBukTreasury {
    /**
     * @dev Emitted when new Stable token address has been updated
     * @param oldAddress, Address of the old address
     * @param newAddress, Address of the new address
     */
    event SetStableToken(
        address indexed oldAddress,
        address indexed newAddress
    );

    /**
     * @dev Emitted when new Buk Protocol address has been updated
     * @param oldAddress, Address of the old address
     * @param newAddress, Address of the new address
     */
    event BukProtocolSet(
        address indexed oldAddress,
        address indexed newAddress
    );

    /**
     * @dev Emitted when amount is withdrawn
     * @param account, Address of the amount sent
     * @param amount, Total amount withdrawn
     * @param token, Address of the token
     */
    event WithdrawnToken(
        address indexed account,
        uint256 indexed amount,
        address token
    );

    /**
     * @dev Emitted when the amount Refunds.
     * @param account, Address of the amount sent
     * @param amount, Total amount withdrawn
     * @param token, Address of the token
     */
    event Refund(
        address indexed account,
        uint256 indexed amount,
        address token
    );

    /**
     * Transfer stable tokens to the specified account.
     * @param _amount, Total funds to transfer
     * @param _account, Address of the account, funds transferred
     * @dev To transfer the amount in stable to the account.
     * @notice This function can only be called by Buk Protocol contract
     */
    function stableRefund(uint256 _amount, address _account) external;

    /**
     * Transfer other tokens
     * @param _amount, Total funds to transfer
     * @param _account, Address of the account, funds transferred
     * @dev To transfer the amount in specified currency to the account.
     * @notice This function can only be called by the Buk Protocol contract
     */
    function otherRefund(
        uint256 _amount,
        address _account,
        address _token
    ) external;

    /**
     * @dev Gets stable token address
     * @return address, Address of the stable token contract
     */
    function getStableToken() external view returns (address);
}

File 16 of 16 : ISignatureVerifier.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

/**
 * @title Interface to define the signature verifier contract
 * @author BUK Technology Inc
 * @notice Collection of all functions related to the signature verifier.
 */
interface ISignatureVerifier {
    /**
     * @dev Function verify
     * Verifies the signature of a hashed message using ECDSA.
     * @param _hash The original message hash that was signed.
     * @param _signature The signature of the message.
     * @return The address of the signer who generated the given signature.
     */
    function verify(
        bytes memory _hash,
        bytes memory _signature
    ) external view returns (address);

    /**
     * @dev Function generateAndVerify
     * Generates a hash from the given parameters and verifies the signature of the hash using ECDSA.
     * @param _totalPenalty The total penalty amount.
     * @param _totalRefund The total refund amount.
     * @param _totalCharges The total charges amount.
     * @param _signature The signature of the message.
     * @return The address of the signer who generated the given signature.
     */
    function generateAndVerify(
        uint256 _totalPenalty,
        uint256 _totalRefund,
        uint256 _totalCharges,
        bytes memory _signature
    ) external view returns (address);
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract ABI

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pe":"uint256"},{"internalType":"bool","name":"_tradeable","type":"bool"}],"name":"bookRooms","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"_total","type":"uint256[]"},{"internalType":"uint256[]","name":"_baseRate","type":"uint256[]"},{"internalType":"uint256[]","name":"_minSalePrice","type":"uint256[]"},{"internalType":"uint256[]","name":"_adult","type":"uint256[]"},{"internalType":"uint256[]","name":"_child","type":"uint256[]"},{"internalType":"bytes32","name":"_propertyId","type":"bytes32"},{"internalType":"uint256","name":"_checkin","type":"uint256"},{"internalType":"uint256","name":"_checkout","type":"uint256"},{"internalType":"uint256","name":"_tradeTimeLimit","type":"uint256"},{"internalType":"bool","name":"_tradeable","type":"bool"},{"internalType":"address","name":"_user","type":"address"}],"name":"bookRoomsOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"_ids","type":"uint256[]"},{"internalType":"address","name":"_owner","type":"address"}],"name":"bookingRefund","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"_ids","type":"uint256[]"},{"internalType":"uint256[]","name":"_penalties","type":"uint256[]"},{"internalType":"uint256[]","name":"_refunds","type":"uint256[]"},{"internalType":"uint256[]","name":"_charges","type":"uint256[]"},{"internalType":"address","name":"_bookingOwner","type":"address"},{"internalType":"bytes","name":"_signature","type":"bytes"}],"name":"cancelRooms","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"_ids","type":"uint256[]"}],"name":"checkin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"_ids","type":"uint256[]"},{"internalType":"address[]","name":"_recipients","type":"address[]"}],"name":"checkout","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"commission","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_id","type":"uint256"},{"internalType":"uint256","name":"_refund","type":"uint256"},{"internalType":"uint256","name":"_charges","type":"uint256"},{"internalType":"address","name":"_bookingOwner","type":"address"}],"name":"emergencyCancellation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"getBookingDetails","outputs":[{"components":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes32","name":"propertyId","type":"bytes32"},{"internalType":"enum IBukProtocol.BookingStatus","name":"status","type":"uint8"},{"internalType":"uint256","name":"adult","type":"uint256"},{"internalType":"uint256","name":"child","type":"uint256"},{"internalType":"address","name":"firstOwner","type":"address"},{"internalType":"uint256","name":"checkin","type":"uint256"},{"internalType":"uint256","name":"checkout","type":"uint256"},{"internalType":"uint256","name":"total","type":"uint256"},{"internalType":"uint256","name":"baseRate","type":"uint256"},{"internalType":"uint256","name":"commission","type":"uint256"},{"internalType":"uint256","name":"minSalePrice","type":"uint256"},{"internalType":"uint256","name":"tradeTimeLimit","type":"uint256"},{"internalType":"bool","name":"tradeable","type":"bool"}],"internalType":"struct IBukProtocol.Booking","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"getRoyaltyInfo","outputs":[{"components":[{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint96","name":"royaltyFraction","type":"uint96"}],"internalType":"struct IBukRoyalties.Royalty[]","name":"","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getWallets","outputs":[{"internalType":"address","name":"nftContract","type":"address"},{"internalType":"address","name":"nftPOSContract","type":"address"},{"internalType":"address","name":"royaltiesContract","type":"address"},{"internalType":"address","name":"signatureVerifier","type":"address"},{"internalType":"address","name":"bukTreasury","type":"address"},{"internalType":"address","name":"stableToken","type":"address"},{"internalType":"address","name":"bukWallet","type":"address"},{"internalType":"address","name":"admin","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"_ids","type":"uint256[]"},{"internalType":"string[]","name":"_uri","type":"string[]"},{"internalType":"address","name":"_user","type":"address"}],"name":"mintBukNFTOwner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_adminAddr","type":"address"}],"name":"setAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_nftContractAddr","type":"address"}],"name":"setBukNFTs","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_nftPOSContractAddr","type":"address"}],"name":"setBukPOSNFTs","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_bukTreasuryContract","type":"address"}],"name":"setBukTreasury","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_bukWalletAddr","type":"address"}],"name":"setBukWallet","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_newCommission","type":"uint256"}],"name":"setCommission","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_royaltiesContractAddr","type":"address"}],"name":"setRoyaltiesContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"__signatureVerifier","type":"address"}],"name":"setSignatureVerifier","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_stableTokenAddress","type":"address"}],"name":"setStableToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"toggleTradeability","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000002ef5818f8ae510e286540ac56b8be5910d1070d300000000000000000000000090a38d725cdc8b8622795bc0776ab72396868c2f00000000000000000000000095360c8c6af86311d4f3783970264b2a21edb6b90000000000000000000000000c6747fbf64d8dee29461941667ec3387a636d92000000000000000000000000282deae948155e761dee55d742633401ea8baa10

-----Decoded View---------------
Arg [0] : _bukTreasuryContract (address): 0x2eF5818F8Ae510E286540aC56B8Be5910d1070d3
Arg [1] : _stableTokenAddr (address): 0x90A38d725Cdc8B8622795bc0776aB72396868C2f
Arg [2] : _bukWalletAddr (address): 0x95360c8c6af86311d4f3783970264B2A21edB6b9
Arg [3] : _signVerifierContract (address): 0x0C6747fBf64d8dEe29461941667eC3387A636D92
Arg [4] : _royaltiesContractAddr (address): 0x282DEae948155E761dEe55d742633401EA8BaA10

-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 0000000000000000000000002ef5818f8ae510e286540ac56b8be5910d1070d3
Arg [1] : 00000000000000000000000090a38d725cdc8b8622795bc0776ab72396868c2f
Arg [2] : 00000000000000000000000095360c8c6af86311d4f3783970264b2a21edb6b9
Arg [3] : 0000000000000000000000000c6747fbf64d8dee29461941667ec3387a636d92
Arg [4] : 000000000000000000000000282deae948155e761dee55d742633401ea8baa10


Block Transaction Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.