Contract Source Code (Solidity Standard Json-Input format)

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// SPDX-License-Identifier: MIT
pragma solidity 0.8.12;

import '@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/access/AccessControlEnumerableUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/interfaces/IERC165Upgradeable.sol';
import '@openzeppelin/contracts-upgradeable/token/ERC1155/IERC1155Upgradeable.sol';
import '@openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol';
import '@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol';
import '@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol';
import "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol";

import "./interfaces/ITreasureNFTPriceTracker.sol";

/// @title  Treasure NFT marketplace
/// @notice This contract allows you to buy and sell NFTs from token contracts that are approved by the contract owner.
///         Please note that this contract is upgradeable. In the event of a compromised ProxyAdmin contract owner,
///         collectable tokens and payments may be at risk. To prevent this, the ProxyAdmin is owned by a multi-sig
///         governed by the TreasureDAO council.
/// @dev    This contract does not store any tokens at any time, it's only collects details "the sale" and approvals
///         from both parties and preforms non-custodial transaction by transfering NFT from owner to buying and payment
///         token from buying to NFT owner.
contract TreasureMarketplace is AccessControlEnumerableUpgradeable, PausableUpgradeable, ReentrancyGuardUpgradeable {
    using SafeERC20Upgradeable for IERC20Upgradeable;

    struct ListingOrBid {
        /// @dev number of tokens for sale or requested (1 if ERC-721 token is active for sale) (for bids, quantity for ERC-721 can be greater than 1)
        uint64 quantity;
        /// @dev price per token sold, i.e. extended sale price equals this times quantity purchased. For bids, price offered per item.
        uint128 pricePerItem;
        /// @dev timestamp after which the listing/bid is invalid
        uint64 expirationTime;
        /// @dev the payment token for this listing/bid.
        address paymentTokenAddress;
    }

    struct CollectionOwnerFee {
        /// @dev the fee, out of 10,000, that this collection owner will be given for each sale
        uint32 fee;
        /// @dev the recipient of the collection specific fee
        address recipient;
    }

    enum TokenApprovalStatus {NOT_APPROVED, ERC_721_APPROVED, ERC_1155_APPROVED}

    /// @notice TREASURE_MARKETPLACE_ADMIN_ROLE role hash
    bytes32 public constant TREASURE_MARKETPLACE_ADMIN_ROLE = keccak256("TREASURE_MARKETPLACE_ADMIN_ROLE");

    /// @notice ERC165 interface signatures
    bytes4 private constant INTERFACE_ID_ERC721 = 0x80ac58cd;
    bytes4 private constant INTERFACE_ID_ERC1155 = 0xd9b67a26;

    /// @notice the denominator for portion calculation, i.e. how many basis points are in 100%
    uint256 public constant BASIS_POINTS = 10000;

    /// @notice the maximum fee which the owner may set (in units of basis points)
    uint256 public constant MAX_FEE = 1500;

    /// @notice the maximum fee which the collection owner may set
    uint256 public constant MAX_COLLECTION_FEE = 2000;

    /// @notice the minimum price for which any item can be sold
    uint256 public constant MIN_PRICE = 1e9;

    /// @notice the default token that is used for marketplace sales and fee payments. Can be overridden by collectionToTokenAddress.
    IERC20Upgradeable public paymentToken;

    /// @notice fee portion (in basis points) for each sale, (e.g. a value of 100 is 100/10000 = 1%). This is the fee if no collection owner fee is set.
    uint256 public fee;

    /// @notice address that receives fees
    address public feeReceipient;

    /// @notice mapping for listings, maps: nftAddress => tokenId => offeror
    mapping(address => mapping(uint256 => mapping(address => ListingOrBid))) public listings;

    /// @notice NFTs which the owner has approved to be sold on the marketplace, maps: nftAddress => status
    mapping(address => TokenApprovalStatus) public tokenApprovals;

    /// @notice fee portion (in basis points) for each sale. This is used if a separate fee has been set for the collection owner.
    uint256 public feeWithCollectionOwner;

    /// @notice Maps the collection address to the fees which the collection owner collects. Some collections may not have a seperate fee, such as those owned by the Treasure DAO.
    mapping(address => CollectionOwnerFee) public collectionToCollectionOwnerFee;

    /// @notice Maps the collection address to the payment token that will be used for purchasing. If the address is the zero address, it will use the default paymentToken.
    mapping(address => address) public collectionToPaymentToken;

    /// @notice The address for weth.
    IERC20Upgradeable public weth;

    /// @notice mapping for token bids (721/1155): nftAddress => tokneId => offeror
    mapping(address => mapping(uint256 => mapping(address => ListingOrBid))) public tokenBids;

    /// @notice mapping for collection level bids (721 only): nftAddress => offeror
    mapping(address => mapping(address => ListingOrBid)) public collectionBids;

    /// @notice Indicates if bid related functions are active.
    bool public areBidsActive;

    /// @notice Address of the contract that tracks sales and prices of collections.
    address public priceTrackerAddress;

    /// @notice The fee portion was updated
    /// @param  fee new fee amount (in units of basis points)
    event UpdateFee(uint256 fee);

    /// @notice The fee portion was updated for collections that have a collection owner.
    /// @param  fee new fee amount (in units of basis points)
    event UpdateFeeWithCollectionOwner(uint256 fee);

    /// @notice A collection's fees have changed
    /// @param  _collection  The collection
    /// @param  _recipient   The recipient of the fees. If the address is 0, the collection fees for this collection have been removed.
    /// @param  _fee         The fee amount (in units of basis points)
    event UpdateCollectionOwnerFee(address _collection, address _recipient, uint256 _fee);

    /// @notice The fee recipient was updated
    /// @param  feeRecipient the new recipient to get fees
    event UpdateFeeRecipient(address feeRecipient);


    /// @notice The approval status for a token was updated
    /// @param  nft    which token contract was updated
    /// @param  status the new status
    /// @param  paymentToken the token that will be used for payments for this collection
    event TokenApprovalStatusUpdated(address nft, TokenApprovalStatus status, address paymentToken);

    event TokenBidCreatedOrUpdated(
        address bidder,
        address nftAddress,
        uint256 tokenId,
        uint64 quantity,
        uint128 pricePerItem,
        uint64 expirationTime,
        address paymentToken
    );

    event CollectionBidCreatedOrUpdated(
        address bidder,
        address nftAddress,
        uint64 quantity,
        uint128 pricePerItem,
        uint64 expirationTime,
        address paymentToken
    );

    event TokenBidCancelled(
        address bidder,
        address nftAddress,
        uint256 tokenId
    );

    event CollectionBidCancelled(
        address bidder,
        address nftAddress
    );

    event BidAccepted(
        address seller,
        address bidder,
        address nftAddress,
        uint256 tokenId,
        uint64 quantity,
        uint128 pricePerItem,
        address paymentToken,
        BidType bidType
    );

    /// @notice An item was listed for sale
    /// @param  seller         the offeror of the item
    /// @param  nftAddress     which token contract holds the offered token
    /// @param  tokenId        the identifier for the offered token
    /// @param  quantity       how many of this token identifier are offered (or 1 for a ERC-721 token)
    /// @param  pricePerItem   the price (in units of the paymentToken) for each token offered
    /// @param  expirationTime UNIX timestamp after when this listing expires
    /// @param  paymentToken   the token used to list this item
    event ItemListed(
        address seller,
        address nftAddress,
        uint256 tokenId,
        uint64 quantity,
        uint128 pricePerItem,
        uint64 expirationTime,
        address paymentToken
    );

    /// @notice An item listing was updated
    /// @param  seller         the offeror of the item
    /// @param  nftAddress     which token contract holds the offered token
    /// @param  tokenId        the identifier for the offered token
    /// @param  quantity       how many of this token identifier are offered (or 1 for a ERC-721 token)
    /// @param  pricePerItem   the price (in units of the paymentToken) for each token offered
    /// @param  expirationTime UNIX timestamp after when this listing expires
    /// @param  paymentToken   the token used to list this item
    event ItemUpdated(
        address seller,
        address nftAddress,
        uint256 tokenId,
        uint64 quantity,
        uint128 pricePerItem,
        uint64 expirationTime,
        address paymentToken
    );

    /// @notice An item is no longer listed for sale
    /// @param  seller     former offeror of the item
    /// @param  nftAddress which token contract holds the formerly offered token
    /// @param  tokenId    the identifier for the formerly offered token
    event ItemCanceled(address indexed seller, address indexed nftAddress, uint256 indexed tokenId);

    /// @notice A listed item was sold
    /// @param  seller       the offeror of the item
    /// @param  buyer        the buyer of the item
    /// @param  nftAddress   which token contract holds the sold token
    /// @param  tokenId      the identifier for the sold token
    /// @param  quantity     how many of this token identifier where sold (or 1 for a ERC-721 token)
    /// @param  pricePerItem the price (in units of the paymentToken) for each token sold
    /// @param  paymentToken the payment token that was used to pay for this item
    event ItemSold(
        address seller,
        address buyer,
        address nftAddress,
        uint256 tokenId,
        uint64 quantity,
        uint128 pricePerItem,
        address paymentToken
    );
    
    /// @notice The sales tracker contract was update
    /// @param  _priceTrackerAddress the new address to call for sales price tracking
    event UpdateSalesTracker(address _priceTrackerAddress);

    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor() initializer {}

    /// @notice Perform initial contract setup
    /// @dev    The initializer modifier ensures this is only called once, the owner should confirm this was properly
    ///         performed before publishing this contract address.
    /// @param  _initialFee          fee to be paid on each sale, in basis points
    /// @param  _initialFeeRecipient wallet to collets fees
    /// @param  _initialPaymentToken address of the token that is used for settlement
    function initialize(
        uint256 _initialFee,
        address _initialFeeRecipient,
        IERC20Upgradeable _initialPaymentToken
    )
        external
        initializer
    {
        require(address(_initialPaymentToken) != address(0), "TreasureMarketplace: cannot set address(0)");

        __AccessControl_init_unchained();
        __Pausable_init_unchained();
        __ReentrancyGuard_init_unchained();

        _setRoleAdmin(TREASURE_MARKETPLACE_ADMIN_ROLE, TREASURE_MARKETPLACE_ADMIN_ROLE);
        _grantRole(TREASURE_MARKETPLACE_ADMIN_ROLE, msg.sender);

        setFee(_initialFee, _initialFee);
        setFeeRecipient(_initialFeeRecipient);
        paymentToken = _initialPaymentToken;
    }

    /// @notice Creates an item listing. You must authorize this marketplace with your item's token contract to list.
    /// @param  _nftAddress     which token contract holds the offered token
    /// @param  _tokenId        the identifier for the offered token
    /// @param  _quantity       how many of this token identifier are offered (or 1 for a ERC-721 token)
    /// @param  _pricePerItem   the price (in units of the paymentToken) for each token offered
    /// @param  _expirationTime UNIX timestamp after when this listing expires
    function createListing(
        address _nftAddress,
        uint256 _tokenId,
        uint64 _quantity,
        uint128 _pricePerItem,
        uint64 _expirationTime,
        address _paymentToken
    )
        external
        nonReentrant
        whenNotPaused
    {
        require(listings[_nftAddress][_tokenId][_msgSender()].quantity == 0, "TreasureMarketplace: already listed");
        _createListingWithoutEvent(_nftAddress, _tokenId, _quantity, _pricePerItem, _expirationTime, _paymentToken);
        emit ItemListed(
            _msgSender(),
            _nftAddress,
            _tokenId,
            _quantity,
            _pricePerItem,
            _expirationTime,
            _paymentToken
        );
    }

    /// @notice Updates an item listing
    /// @param  _nftAddress        which token contract holds the offered token
    /// @param  _tokenId           the identifier for the offered token
    /// @param  _newQuantity       how many of this token identifier are offered (or 1 for a ERC-721 token)
    /// @param  _newPricePerItem   the price (in units of the paymentToken) for each token offered
    /// @param  _newExpirationTime UNIX timestamp after when this listing expires
    function updateListing(
        address _nftAddress,
        uint256 _tokenId,
        uint64 _newQuantity,
        uint128 _newPricePerItem,
        uint64 _newExpirationTime,
        address _paymentToken
    )
        external
        nonReentrant
        whenNotPaused
    {
        require(listings[_nftAddress][_tokenId][_msgSender()].quantity > 0, "TreasureMarketplace: not listed item");
        _createListingWithoutEvent(_nftAddress, _tokenId, _newQuantity, _newPricePerItem, _newExpirationTime, _paymentToken);
        emit ItemUpdated(
            _msgSender(),
            _nftAddress,
            _tokenId,
            _newQuantity,
            _newPricePerItem,
            _newExpirationTime,
            _paymentToken
        );
    }

    function createOrUpdateListing(
        address _nftAddress,
        uint256 _tokenId,
        uint64 _quantity,
        uint128 _pricePerItem,
        uint64 _expirationTime,
        address _paymentToken)
    external
    nonReentrant
    whenNotPaused
    {
        bool _existingListing = listings[_nftAddress][_tokenId][_msgSender()].quantity > 0;
        _createListingWithoutEvent(_nftAddress, _tokenId, _quantity, _pricePerItem, _expirationTime, _paymentToken);
        // Keep the events the same as they were before.
        if(_existingListing) {
            emit ItemUpdated(
                _msgSender(),
                _nftAddress,
                _tokenId,
                _quantity,
                _pricePerItem,
                _expirationTime,
                _paymentToken
            );
        } else {
            emit ItemListed(
                _msgSender(),
                _nftAddress,
                _tokenId,
                _quantity,
                _pricePerItem,
                _expirationTime,
                _paymentToken
            );
        }
    }

    /// @notice Performs the listing and does not emit the event
    /// @param  _nftAddress     which token contract holds the offered token
    /// @param  _tokenId        the identifier for the offered token
    /// @param  _quantity       how many of this token identifier are offered (or 1 for a ERC-721 token)
    /// @param  _pricePerItem   the price (in units of the paymentToken) for each token offered
    /// @param  _expirationTime UNIX timestamp after when this listing expires
    function _createListingWithoutEvent(
        address _nftAddress,
        uint256 _tokenId,
        uint64 _quantity,
        uint128 _pricePerItem,
        uint64 _expirationTime,
        address _paymentToken
    )
        internal
    {
        require(_expirationTime > block.timestamp, "TreasureMarketplace: invalid expiration time");
        require(_pricePerItem >= MIN_PRICE, "TreasureMarketplace: below min price");

        if (tokenApprovals[_nftAddress] == TokenApprovalStatus.ERC_721_APPROVED) {
            IERC721Upgradeable nft = IERC721Upgradeable(_nftAddress);
            require(nft.ownerOf(_tokenId) == _msgSender(), "TreasureMarketplace: not owning item");
            require(nft.isApprovedForAll(_msgSender(), address(this)), "TreasureMarketplace: item not approved");
            require(_quantity == 1, "TreasureMarketplace: cannot list multiple ERC721");
        } else if (tokenApprovals[_nftAddress] == TokenApprovalStatus.ERC_1155_APPROVED) {
            IERC1155Upgradeable nft = IERC1155Upgradeable(_nftAddress);
            require(nft.balanceOf(_msgSender(), _tokenId) >= _quantity, "TreasureMarketplace: must hold enough nfts");
            require(nft.isApprovedForAll(_msgSender(), address(this)), "TreasureMarketplace: item not approved");
            require(_quantity > 0, "TreasureMarketplace: nothing to list");
        } else {
            revert("TreasureMarketplace: token is not approved for trading");
        }

        address _paymentTokenForCollection = getPaymentTokenForCollection(_nftAddress);
        require(_paymentTokenForCollection == _paymentToken, "TreasureMarketplace: Wrong payment token");

        listings[_nftAddress][_tokenId][_msgSender()] = ListingOrBid(
            _quantity,
            _pricePerItem,
            _expirationTime,
            _paymentToken
        );
    }

    /// @notice Remove an item listing
    /// @param  _nftAddress which token contract holds the offered token
    /// @param  _tokenId    the identifier for the offered token
    function cancelListing(address _nftAddress, uint256 _tokenId)
        external
        nonReentrant
    {
        delete (listings[_nftAddress][_tokenId][_msgSender()]);
        emit ItemCanceled(_msgSender(), _nftAddress, _tokenId);
    }

    function cancelManyBids(CancelBidParams[] calldata _cancelBidParams) external nonReentrant {
        for(uint256 i = 0; i < _cancelBidParams.length; i++) {
            CancelBidParams calldata _cancelBidParam = _cancelBidParams[i];
            if(_cancelBidParam.bidType == BidType.COLLECTION) {
                collectionBids[_cancelBidParam.nftAddress][_msgSender()].quantity = 0;

                emit CollectionBidCancelled(_msgSender(), _cancelBidParam.nftAddress);
            } else {
                tokenBids[_cancelBidParam.nftAddress][_cancelBidParam.tokenId][_msgSender()].quantity = 0;

                emit TokenBidCancelled(_msgSender(), _cancelBidParam.nftAddress, _cancelBidParam.tokenId);
            }
        }
    }

    /// @notice Creates a bid for a particular token.
    function createOrUpdateTokenBid(
        address _nftAddress,
        uint256 _tokenId,
        uint64 _quantity,
        uint128 _pricePerItem,
        uint64 _expirationTime,
        address _paymentToken)
    external
    nonReentrant
    whenNotPaused
    whenBiddingActive
    {
        if(tokenApprovals[_nftAddress] == TokenApprovalStatus.ERC_721_APPROVED) {
            require(_quantity == 1, "TreasureMarketplace: token bid quantity 1 for ERC721");
        } else if (tokenApprovals[_nftAddress] == TokenApprovalStatus.ERC_1155_APPROVED) {
            require(_quantity > 0, "TreasureMarketplace: bad quantity");
        } else {
            revert("TreasureMarketplace: token is not approved for trading");
        }

        _createBidWithoutEvent(_nftAddress, _quantity, _pricePerItem, _expirationTime, _paymentToken, tokenBids[_nftAddress][_tokenId][_msgSender()]);

        emit TokenBidCreatedOrUpdated(
            _msgSender(),
            _nftAddress,
            _tokenId,
            _quantity,
            _pricePerItem,
            _expirationTime,
            _paymentToken
        );
    }

    function createOrUpdateCollectionBid(
        address _nftAddress,
        uint64 _quantity,
        uint128 _pricePerItem,
        uint64 _expirationTime,
        address _paymentToken)
    external
    nonReentrant
    whenNotPaused
    whenBiddingActive
    {
        if(tokenApprovals[_nftAddress] == TokenApprovalStatus.ERC_721_APPROVED) {
            require(_quantity > 0, "TreasureMarketplace: Bad quantity");
        } else if (tokenApprovals[_nftAddress] == TokenApprovalStatus.ERC_1155_APPROVED) {
            revert("TreasureMarketplace: No collection bids on 1155s");
        } else {
            revert("TreasureMarketplace: token is not approved for trading");
        }

        _createBidWithoutEvent(_nftAddress, _quantity, _pricePerItem, _expirationTime, _paymentToken, collectionBids[_nftAddress][_msgSender()]);

        emit CollectionBidCreatedOrUpdated(
            _msgSender(),
            _nftAddress,
            _quantity,
            _pricePerItem,
            _expirationTime,
            _paymentToken
        );
    }

    function _createBidWithoutEvent(
        address _nftAddress,
        uint64 _quantity,
        uint128 _pricePerItem,
        uint64 _expirationTime,
        address _paymentToken,
        ListingOrBid storage _bid)
    private
    {
        require(_expirationTime > block.timestamp, "TreasureMarketplace: invalid expiration time");
        require(_pricePerItem >= MIN_PRICE, "TreasureMarketplace: below min price");

        address _paymentTokenForCollection = getPaymentTokenForCollection(_nftAddress);
        require(_paymentTokenForCollection == _paymentToken, "TreasureMarketplace: Bad payment token");

        IERC20Upgradeable _token = IERC20Upgradeable(_paymentToken);

        uint256 _totalAmountNeeded = _pricePerItem * _quantity;

        require(_token.allowance(_msgSender(), address(this)) >= _totalAmountNeeded && _token.balanceOf(_msgSender()) >= _totalAmountNeeded,
            "TreasureMarketplace: Not enough tokens owned or allowed for bid");

        _bid.quantity = _quantity;
        _bid.pricePerItem = _pricePerItem;
        _bid.expirationTime = _expirationTime;
        _bid.paymentTokenAddress = _paymentToken;
    }

    function acceptCollectionBid(
        AcceptBidParams calldata _acceptBidParams)
    external
    nonReentrant
    whenNotPaused
    whenBiddingActive
    {
        _acceptBid(_acceptBidParams, BidType.COLLECTION);
    }

    function acceptTokenBid(
        AcceptBidParams calldata _acceptBidParams)
    external
    nonReentrant
    whenNotPaused
    whenBiddingActive
    {
        _acceptBid(_acceptBidParams, BidType.TOKEN);
    }

    function _acceptBid(AcceptBidParams calldata _acceptBidParams, BidType _bidType) private {
        // Validate buy order
        require(_msgSender() != _acceptBidParams.bidder, "TreasureMarketplace: Cannot supply own bid");
        require(_acceptBidParams.quantity > 0, "TreasureMarketplace: Nothing to supply to bidder");

        // Validate bid
        ListingOrBid storage _bid = _bidType == BidType.COLLECTION
            ? collectionBids[_acceptBidParams.nftAddress][_acceptBidParams.bidder]
            : tokenBids[_acceptBidParams.nftAddress][_acceptBidParams.tokenId][_acceptBidParams.bidder];

        require(_bid.quantity > 0, "TreasureMarketplace: bid does not exist");
        require(_bid.expirationTime >= block.timestamp, "TreasureMarketplace: bid expired");
        require(_bid.pricePerItem > 0, "TreasureMarketplace: bid price invalid");
        require(_bid.quantity >= _acceptBidParams.quantity, "TreasureMarketplace: not enough quantity");
        require(_bid.pricePerItem == _acceptBidParams.pricePerItem, "TreasureMarketplace: price does not match");

        // Ensure the accepter, the bidder, and the collection all agree on the token to be used for the purchase.
        // If the token used for buying/selling has changed since the bid was created, this effectively blocks
        // all the old bids with the old payment tokens from being bought.
        address _paymentTokenForCollection = getPaymentTokenForCollection(_acceptBidParams.nftAddress);

        require(_bid.paymentTokenAddress == _acceptBidParams.paymentToken && _acceptBidParams.paymentToken == _paymentTokenForCollection, "TreasureMarketplace: Wrong payment token");

        // Transfer NFT to buyer, also validates owner owns it, and token is approved for trading
        if(tokenApprovals[_acceptBidParams.nftAddress] == TokenApprovalStatus.ERC_721_APPROVED) {
            require(_acceptBidParams.quantity == 1, "TreasureMarketplace: Cannot supply multiple ERC721s");

            IERC721Upgradeable(_acceptBidParams.nftAddress).safeTransferFrom(_msgSender(), _acceptBidParams.bidder, _acceptBidParams.tokenId);
        } else if (tokenApprovals[_acceptBidParams.nftAddress] == TokenApprovalStatus.ERC_1155_APPROVED) {

            IERC1155Upgradeable(_acceptBidParams.nftAddress).safeTransferFrom(_msgSender(), _acceptBidParams.bidder, _acceptBidParams.tokenId, _acceptBidParams.quantity, bytes(""));
        } else {
            revert("TreasureMarketplace: token is not approved for trading");
        }

        _payFees(_bid, _acceptBidParams.quantity, _acceptBidParams.nftAddress, _acceptBidParams.bidder, _msgSender(), _acceptBidParams.paymentToken, false);

        if(priceTrackerAddress != address(0)) {
            ITreasureNFTPriceTracker(priceTrackerAddress).recordSale(_acceptBidParams.nftAddress, _acceptBidParams.tokenId, _bid.pricePerItem);
        }

        // Announce accepting bid
        emit BidAccepted(
            _msgSender(),
            _acceptBidParams.bidder,
            _acceptBidParams.nftAddress,
            _acceptBidParams.tokenId,
            _acceptBidParams.quantity,
            _acceptBidParams.pricePerItem,
            _acceptBidParams.paymentToken,
            _bidType
        );

        // Deplete or cancel listing
        _bid.quantity -= _acceptBidParams.quantity;
    }

    /// @notice Buy multiple listed items. You must authorize this marketplace with your payment token to completed the buy or purchase with eth if it is a weth collection.
    function buyItems(
        BuyItemParams[] calldata _buyItemParams)
    external
    payable
    nonReentrant
    whenNotPaused
    {
        uint256 _ethAmountRequired;
        for(uint256 i = 0; i < _buyItemParams.length; i++) {
            _ethAmountRequired += _buyItem(_buyItemParams[i]);
        }

        require(msg.value == _ethAmountRequired, "TreasureMarketplace: Bad ETH value");
    }

    // Returns the amount of eth a user must have sent.
    function _buyItem(BuyItemParams calldata _buyItemParams) private returns(uint256) {
        // Validate buy order
        require(_msgSender() != _buyItemParams.owner, "TreasureMarketplace: Cannot buy your own item");
        require(_buyItemParams.quantity > 0, "TreasureMarketplace: Nothing to buy");

        // Validate listing
        ListingOrBid memory listedItem = listings[_buyItemParams.nftAddress][_buyItemParams.tokenId][_buyItemParams.owner];
        require(listedItem.quantity > 0, "TreasureMarketplace: not listed item");
        require(listedItem.expirationTime >= block.timestamp, "TreasureMarketplace: listing expired");
        require(listedItem.pricePerItem > 0, "TreasureMarketplace: listing price invalid");
        require(listedItem.quantity >= _buyItemParams.quantity, "TreasureMarketplace: not enough quantity");
        require(listedItem.pricePerItem <= _buyItemParams.maxPricePerItem, "TreasureMarketplace: price increased");

        // Ensure the buyer, the seller, and the collection all agree on the token to be used for the purchase.
        // If the token used for buying/selling has changed since the listing was created, this effectively blocks
        // all the old listings with the old payment tokens from being bought.
        address _paymentTokenForCollection = getPaymentTokenForCollection(_buyItemParams.nftAddress);
        address _paymentTokenForListing = _getPaymentTokenForListing(listedItem);

        require(_paymentTokenForListing == _buyItemParams.paymentToken && _buyItemParams.paymentToken == _paymentTokenForCollection, "TreasureMarketplace: Wrong payment token");

        if(_buyItemParams.usingEth) {
            require(_paymentTokenForListing == address(weth), "TreasureMarketplace: ETH only used with weth collection");
        }

        // Transfer NFT to buyer, also validates owner owns it, and token is approved for trading
        if (tokenApprovals[_buyItemParams.nftAddress] == TokenApprovalStatus.ERC_721_APPROVED) {
            require(_buyItemParams.quantity == 1, "TreasureMarketplace: Cannot buy multiple ERC721");
            IERC721Upgradeable(_buyItemParams.nftAddress).safeTransferFrom(_buyItemParams.owner, _msgSender(), _buyItemParams.tokenId);
        } else if (tokenApprovals[_buyItemParams.nftAddress] == TokenApprovalStatus.ERC_1155_APPROVED) {
            IERC1155Upgradeable(_buyItemParams.nftAddress).safeTransferFrom(_buyItemParams.owner, _msgSender(), _buyItemParams.tokenId, _buyItemParams.quantity, bytes(""));
        } else {
            revert("TreasureMarketplace: token is not approved for trading");
        }

        _payFees(listedItem, _buyItemParams.quantity, _buyItemParams.nftAddress, _msgSender(), _buyItemParams.owner, _buyItemParams.paymentToken, _buyItemParams.usingEth);

        // Announce sale
        emit ItemSold(
            _buyItemParams.owner,
            _msgSender(),
            _buyItemParams.nftAddress,
            _buyItemParams.tokenId,
            _buyItemParams.quantity,
            listedItem.pricePerItem, // this is deleted below in "Deplete or cancel listing"
            _buyItemParams.paymentToken
        );

        // Deplete or cancel listing
        if (listedItem.quantity == _buyItemParams.quantity) {
            delete listings[_buyItemParams.nftAddress][_buyItemParams.tokenId][_buyItemParams.owner];
        } else {
            listings[_buyItemParams.nftAddress][_buyItemParams.tokenId][_buyItemParams.owner].quantity -= _buyItemParams.quantity;
        }
        
        if(priceTrackerAddress != address(0)) {
            ITreasureNFTPriceTracker(priceTrackerAddress).recordSale(_buyItemParams.nftAddress, _buyItemParams.tokenId, listedItem.pricePerItem);
        }

        if(_buyItemParams.usingEth) {
            return _buyItemParams.quantity * listedItem.pricePerItem;
        } else {
            return 0;
        }
    }

    /// @dev pays the fees to the marketplace fee recipient, the collection recipient if one exists, and to the seller of the item.
    /// @param _listOrBid the item that is being purchased/accepted
    /// @param _quantity the quantity of the item being purchased/accepted
    /// @param _collectionAddress the collection to which this item belongs
    function _payFees(ListingOrBid memory _listOrBid, uint256 _quantity, address _collectionAddress, address _from, address _to, address _paymentTokenAddress, bool _usingEth) private {
        IERC20Upgradeable _paymentToken = IERC20Upgradeable(_paymentTokenAddress);

        // Handle purchase price payment
        uint256 _totalPrice = _listOrBid.pricePerItem * _quantity;

        address _collectionFeeRecipient = collectionToCollectionOwnerFee[_collectionAddress].recipient;

        uint256 _protocolFee;
        uint256 _collectionFee;

        if(_collectionFeeRecipient != address(0)) {
            _protocolFee = feeWithCollectionOwner;
            _collectionFee = collectionToCollectionOwnerFee[_collectionAddress].fee;
        } else {
            _protocolFee = fee;
            _collectionFee = 0;
        }

        uint256 _protocolFeeAmount = _totalPrice * _protocolFee / BASIS_POINTS;
        uint256 _collectionFeeAmount = _totalPrice * _collectionFee / BASIS_POINTS;

        _transferAmount(_from, feeReceipient, _protocolFeeAmount, _paymentToken, _usingEth);
        _transferAmount(_from, _collectionFeeRecipient, _collectionFeeAmount, _paymentToken, _usingEth);

        // Transfer rest to seller
        _transferAmount(_from, _to, _totalPrice - _protocolFeeAmount - _collectionFeeAmount, _paymentToken, _usingEth);
    }

    function _transferAmount(address _from, address _to, uint256 _amount, IERC20Upgradeable _paymentToken, bool _usingEth) private {
        if(_amount == 0) {
            return;
        }

        if(_usingEth) {
            (bool _success,) = payable(_to).call{value: _amount}("");
            require(_success, "TreasureMarketplace: Sending eth was not successful");
        } else {
            _paymentToken.safeTransferFrom(_from, _to, _amount);
        }
    }

    function getPaymentTokenForCollection(address _collection) public view returns(address) {
        address _collectionPaymentToken = collectionToPaymentToken[_collection];

        // For backwards compatability. If a collection payment wasn't set at the collection level, it was using the payment token.
        return _collectionPaymentToken == address(0) ? address(paymentToken) : _collectionPaymentToken;
    }

    function _getPaymentTokenForListing(ListingOrBid memory listedItem) private view returns(address) {
        // For backwards compatability. If a listing has no payment token address, it was using the original, default payment token.
        return listedItem.paymentTokenAddress == address(0) ? address(paymentToken) : listedItem.paymentTokenAddress;
    }

    // Owner administration ////////////////////////////////////////////////////////////////////////////////////////////

    /// @notice Updates the fee amount which is collected during sales, for both collections with and without owner specific fees.
    /// @dev    This is callable only by the owner. Both fees may not exceed MAX_FEE
    /// @param  _newFee the updated fee amount is basis points
    function setFee(uint256 _newFee, uint256 _newFeeWithCollectionOwner) public onlyRole(TREASURE_MARKETPLACE_ADMIN_ROLE) {
        require(_newFee <= MAX_FEE && _newFeeWithCollectionOwner <= MAX_FEE, "TreasureMarketplace: max fee");

        fee = _newFee;
        feeWithCollectionOwner = _newFeeWithCollectionOwner;

        emit UpdateFee(_newFee);
        emit UpdateFeeWithCollectionOwner(_newFeeWithCollectionOwner);
    }

    /// @notice Updates the fee amount which is collected during sales fro a specific collection
    /// @dev    This is callable only by the owner
    /// @param  _collectionAddress The collection in question. This must be whitelisted.
    /// @param _collectionOwnerFee The fee and recipient for the collection. If the 0 address is passed as the recipient, collection specific fees will not be collected.
    function setCollectionOwnerFee(address _collectionAddress, CollectionOwnerFee calldata _collectionOwnerFee) external onlyRole(TREASURE_MARKETPLACE_ADMIN_ROLE) {
        require(tokenApprovals[_collectionAddress] == TokenApprovalStatus.ERC_1155_APPROVED
            || tokenApprovals[_collectionAddress] == TokenApprovalStatus.ERC_721_APPROVED, "TreasureMarketplace: Collection is not approved");
        require(_collectionOwnerFee.fee <= MAX_COLLECTION_FEE, "TreasureMarketplace: Collection fee too high");

        // The collection recipient can be the 0 address, meaning we will treat this as a collection with no collection owner fee.
        collectionToCollectionOwnerFee[_collectionAddress] = _collectionOwnerFee;

        emit UpdateCollectionOwnerFee(_collectionAddress, _collectionOwnerFee.recipient, _collectionOwnerFee.fee);
    }

    /// @notice Updates the fee recipient which receives fees during sales
    /// @dev    This is callable only by the owner.
    /// @param  _newFeeRecipient the wallet to receive fees
    function setFeeRecipient(address _newFeeRecipient) public onlyRole(TREASURE_MARKETPLACE_ADMIN_ROLE) {
        require(_newFeeRecipient != address(0), "TreasureMarketplace: cannot set 0x0 address");
        feeReceipient = _newFeeRecipient;
        emit UpdateFeeRecipient(_newFeeRecipient);
    }

    /// @notice Sets a token as an approved kind of NFT or as ineligible for trading
    /// @dev    This is callable only by the owner.
    /// @param  _nft    address of the NFT to be approved
    /// @param  _status the kind of NFT approved, or NOT_APPROVED to remove approval
    function setTokenApprovalStatus(address _nft, TokenApprovalStatus _status, address _paymentToken) external onlyRole(TREASURE_MARKETPLACE_ADMIN_ROLE) {
        if (_status == TokenApprovalStatus.ERC_721_APPROVED) {
            require(IERC165Upgradeable(_nft).supportsInterface(INTERFACE_ID_ERC721), "TreasureMarketplace: not an ERC721 contract");
        } else if (_status == TokenApprovalStatus.ERC_1155_APPROVED) {
            require(IERC165Upgradeable(_nft).supportsInterface(INTERFACE_ID_ERC1155), "TreasureMarketplace: not an ERC1155 contract");
        }

        require(_paymentToken != address(0) && (_paymentToken == address(weth) || _paymentToken == address(paymentToken)), "TreasureMarketplace: Payment token not supported");

        tokenApprovals[_nft] = _status;

        collectionToPaymentToken[_nft] = _paymentToken;
        emit TokenApprovalStatusUpdated(_nft, _status, _paymentToken);
    }

    function setWeth(address _wethAddress) external onlyRole(TREASURE_MARKETPLACE_ADMIN_ROLE) {
        require(address(weth) == address(0), "WETH address already set");

        weth = IERC20Upgradeable(_wethAddress);
    }

    /// @notice Updates the fee recipient which receives fees during sales
    /// @dev    This is callable only by the owner.
    /// @param  _priceTrackerAddress the wallet to receive fees
    function setPriceTracker(address _priceTrackerAddress) public onlyRole(TREASURE_MARKETPLACE_ADMIN_ROLE) {
        require(_priceTrackerAddress != address(0), "TreasureMarketplace: cannot set 0x0 address");
        priceTrackerAddress = _priceTrackerAddress;
        emit UpdateSalesTracker(_priceTrackerAddress);
    }

    function toggleAreBidsActive() external onlyRole(TREASURE_MARKETPLACE_ADMIN_ROLE) {
        areBidsActive = !areBidsActive;
    }

    /// @notice Pauses the marketplace, creatisgn and executing listings is paused
    /// @dev    This is callable only by the owner. Canceling listings is not paused.
    function pause() external onlyRole(TREASURE_MARKETPLACE_ADMIN_ROLE) {
        _pause();
    }

    /// @notice Unpauses the marketplace, all functionality is restored
    /// @dev    This is callable only by the owner.
    function unpause() external onlyRole(TREASURE_MARKETPLACE_ADMIN_ROLE) {
        _unpause();
    }

    modifier whenBiddingActive() {
        require(areBidsActive, "TreasureMarketplace: Bidding is not active");

        _;
    }
}

struct BuyItemParams {
    /// which token contract holds the offered token
    address nftAddress;
    /// the identifier for the token to be bought
    uint256 tokenId;
    /// current owner of the item(s) to be bought
    address owner;
    /// how many of this token identifier to be bought (or 1 for a ERC-721 token)
    uint64 quantity;
    /// the maximum price (in units of the paymentToken) for each token offered
    uint128 maxPricePerItem;
    /// the payment token to be used
    address paymentToken;
    /// indicates if the user is purchasing this item with eth.
    bool usingEth;
}

struct AcceptBidParams {
    // Which token contract holds the given tokens
    address nftAddress;
    // The token id being given
    uint256 tokenId;
    // The user who created the bid initially
    address bidder;
    // The quantity of items being supplied to the bidder
    uint64 quantity;
    // The price per item that the bidder is offering
    uint128 pricePerItem;
    /// the payment token to be used
    address paymentToken;
}

struct CancelBidParams {
    BidType bidType;
    address nftAddress;
    uint256 tokenId;
}

enum BidType {
    TOKEN,
    COLLECTION
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControlEnumerable.sol)

pragma solidity ^0.8.0;

import "./IAccessControlEnumerableUpgradeable.sol";
import "./AccessControlUpgradeable.sol";
import "../utils/structs/EnumerableSetUpgradeable.sol";
import "../proxy/utils/Initializable.sol";

/**
 * @dev Extension of {AccessControl} that allows enumerating the members of each role.
 */
abstract contract AccessControlEnumerableUpgradeable is Initializable, IAccessControlEnumerableUpgradeable, AccessControlUpgradeable {
    function __AccessControlEnumerable_init() internal onlyInitializing {
    }

    function __AccessControlEnumerable_init_unchained() internal onlyInitializing {
    }
    using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;

    mapping(bytes32 => EnumerableSetUpgradeable.AddressSet) private _roleMembers;

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

    /**
     * @dev Returns one of the accounts that have `role`. `index` must be a
     * value between 0 and {getRoleMemberCount}, non-inclusive.
     *
     * Role bearers are not sorted in any particular way, and their ordering may
     * change at any point.
     *
     * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
     * you perform all queries on the same block. See the following
     * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
     * for more information.
     */
    function getRoleMember(bytes32 role, uint256 index) public view virtual override returns (address) {
        return _roleMembers[role].at(index);
    }

    /**
     * @dev Returns the number of accounts that have `role`. Can be used
     * together with {getRoleMember} to enumerate all bearers of a role.
     */
    function getRoleMemberCount(bytes32 role) public view virtual override returns (uint256) {
        return _roleMembers[role].length();
    }

    /**
     * @dev Overload {_grantRole} to track enumerable memberships
     */
    function _grantRole(bytes32 role, address account) internal virtual override {
        super._grantRole(role, account);
        _roleMembers[role].add(account);
    }

    /**
     * @dev Overload {_revokeRole} to track enumerable memberships
     */
    function _revokeRole(bytes32 role, address account) internal virtual override {
        super._revokeRole(role, account);
        _roleMembers[role].remove(account);
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControl.sol)

pragma solidity ^0.8.0;

import "./IAccessControlUpgradeable.sol";
import "../utils/ContextUpgradeable.sol";
import "../utils/StringsUpgradeable.sol";
import "../utils/introspection/ERC165Upgradeable.sol";
import "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it.
 */
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable {
    function __AccessControl_init() internal onlyInitializing {
    }

    function __AccessControl_init_unchained() internal onlyInitializing {
    }
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

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

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

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

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        StringsUpgradeable.toHexString(uint160(account), 20),
                        " is missing role ",
                        StringsUpgradeable.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

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

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

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

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

        _revokeRole(role, account);
    }

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

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

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

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

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

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

pragma solidity ^0.8.0;

import "./IAccessControlUpgradeable.sol";

/**
 * @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
 */
interface IAccessControlEnumerableUpgradeable is IAccessControlUpgradeable {
    /**
     * @dev Returns one of the accounts that have `role`. `index` must be a
     * value between 0 and {getRoleMemberCount}, non-inclusive.
     *
     * Role bearers are not sorted in any particular way, and their ordering may
     * change at any point.
     *
     * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
     * you perform all queries on the same block. See the following
     * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
     * for more information.
     */
    function getRoleMember(bytes32 role, uint256 index) external view returns (address);

    /**
     * @dev Returns the number of accounts that have `role`. Can be used
     * together with {getRoleMember} to enumerate all bearers of a role.
     */
    function getRoleMemberCount(bytes32 role) external view returns (uint256);
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";

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

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

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

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

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

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

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

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

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

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

pragma solidity ^0.8.0;

import "../utils/introspection/IERC165Upgradeable.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
 * initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() initializer {}
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     */
    bool private _initialized;

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

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        // If the contract is initializing we ignore whether _initialized is set in order to support multiple
        // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
        // contract may have been reentered.
        require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");

        bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }

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

    function _isConstructor() private view returns (bool) {
        return !AddressUpgradeable.isContract(address(this));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";

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

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

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    function __Pausable_init() internal onlyInitializing {
        __Pausable_init_unchained();
    }

    function __Pausable_init_unchained() internal onlyInitializing {
        _paused = false;
    }

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

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

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

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

    uint256 private _status;

    function __ReentrancyGuard_init() internal onlyInitializing {
        __ReentrancyGuard_init_unchained();
    }

    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

        _;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165Upgradeable.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 IERC1155Upgradeable is IERC165Upgradeable {
    /**
     * @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 be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) external;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20Upgradeable {
    /**
     * @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);

    /**
     * @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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20Upgradeable.sol";
import "../../../utils/AddressUpgradeable.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 SafeERC20Upgradeable {
    using AddressUpgradeable for address;

    function safeTransfer(
        IERC20Upgradeable token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20Upgradeable 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(
        IERC20Upgradeable 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));
    }

    function safeIncreaseAllowance(
        IERC20Upgradeable token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20Upgradeable token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @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(IERC20Upgradeable 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");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165Upgradeable.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721Upgradeable is IERC165Upgradeable {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

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

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

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

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

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

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

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

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

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

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

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

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

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

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library StringsUpgradeable {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

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

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

pragma solidity ^0.8.0;

import "./IERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
    function __ERC165_init() internal onlyInitializing {
    }

    function __ERC165_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165Upgradeable).interfaceId;
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts 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 IERC165Upgradeable {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

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

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSetUpgradeable {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

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

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

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

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

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

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

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

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

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

            return true;
        } else {
            return false;
        }
    }

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

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

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

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

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

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

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

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

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

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

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

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

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

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

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

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

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

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

        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

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

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

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

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

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

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

        assembly {
            result := store
        }

        return result;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.12;

interface ITreasureNFTPriceTracker {
    event AveragePriceUpdated(
        address indexed _collection,
        FloorType indexed _floorType,
        uint256 _oldAverage,
        uint256 _salePrice,
        uint256 _newAverage
    );

    // Saves the given sale of a token in a collection if it meets the saving criteria.
    function recordSale(address _collection, uint256 _tokenId, uint256 _salePrice) external;
    // Returns the average price for the given collection in the floor type category.
    // Can return 0 if asking for a FloorType that isn't being tracked for that given collection
    function getAveragePriceForCollection(address _collection, FloorType _floorType) external view returns (uint256);
}

// Allows for customization within tracking floor prices
// Ex: Tracking legion genesis commons could be subfloor1, genesis uncommons subfloor2, etc
enum FloorType {
    FLOOR,
    SUBFLOOR1,
    SUBFLOOR2,
    SUBFLOOR3
}

{
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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