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// SPDX-License-Identifier: AGPL-3.0-or-later

pragma solidity =0.8.9;
pragma abicoder v2;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "./interface/INFTKEYMarketplaceV2.sol";
import "./NFTKEYMarketplaceRoyalty.sol";

/**
 * @title NFTKEY Marketplace contract V2
 * Note: Payment tokens usually is the chain native coin's wrapped token, e.g. WETH, WBNB
 */
contract NFTKEYMarketplaceV2 is
    INFTKEYMarketplaceV2,
    Ownable,
    NFTKEYMarketplaceRoyalty,
    ReentrancyGuard
{
    using Address for address;
    using EnumerableSet for EnumerableSet.UintSet;
    using EnumerableSet for EnumerableSet.AddressSet;
    using SafeERC20 for IERC20;

    constructor(address _paymentTokenAddress) {
        _paymentToken = IERC20(_paymentTokenAddress);
    }

    IERC20 private immutable _paymentToken;

    bool private _isTradingEnabled = true;
    uint8 private _serviceFeeFraction = 20;
    uint256 private _actionTimeOutRangeMin = 1800; // 30 mins
    uint256 private _actionTimeOutRangeMax = 31536000; // One year - This can extend by owner is contract is working smoothly

    mapping(address => ERC721Market) private _erc721Market;

    /**
     * @dev only if listing and bid is enabled
     * This is to help contract migration in case of upgrading contract
     */
    modifier onlyTradingOpen() {
        require(_isTradingEnabled, "Listing and bid are not enabled");
        _;
    }

    /**
     * @dev only if the entered timestamp is within the allowed range
     * This helps to not list or bid for too short or too long period of time
     */
    modifier onlyAllowedExpireTimestamp(uint256 expireTimestamp) {
        require(
            expireTimestamp - block.timestamp >= _actionTimeOutRangeMin,
            "Please enter a longer period of time"
        );
        require(
            expireTimestamp - block.timestamp <= _actionTimeOutRangeMax,
            "Please enter a shorter period of time"
        );
        _;
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-listToken}.
     * The timestamp set needs to be in the allowed range
     * Listing must be valid
     */
    function listToken(
        address erc721Address,
        uint256 tokenId,
        uint256 value,
        uint256 expireTimestamp
    )
        external
        override
        onlyTradingOpen
        onlyAllowedExpireTimestamp(expireTimestamp)
    {
        Listing memory listing = Listing({
            tokenId: tokenId,
            value: value,
            seller: msg.sender,
            expireTimestamp: expireTimestamp
        });

        require(
            _isListingValid(erc721Address, listing),
            "Listing is not valid"
        );

        _erc721Market[erc721Address].listings[tokenId] = listing;
        _erc721Market[erc721Address].tokenIdWithListing.add(tokenId);

        emit TokenListed(erc721Address, tokenId, listing);
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-delistToken}.
     * msg.sender must be the seller of the listing record
     */
    function delistToken(address erc721Address, uint256 tokenId)
        external
        override
    {
        require(
            _erc721Market[erc721Address].listings[tokenId].seller == msg.sender,
            "Only token seller can delist token"
        );

        emit TokenDelisted(
            erc721Address,
            tokenId,
            _erc721Market[erc721Address].listings[tokenId]
        );

        _delistToken(erc721Address, tokenId);
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-buyToken}.
     * Must have a valid listing
     * msg.sender must not the owner of token
     * msg.value must be at least sell price plus fees
     */
    function buyToken(address erc721Address, uint256 tokenId)
        external
        payable
        override
        nonReentrant
    {
        Listing memory listing = _erc721Market[erc721Address].listings[tokenId];
        require(
            _isListingValid(erc721Address, listing),
            "Token is not for sale"
        );
        require(
            !_isTokenOwner(erc721Address, tokenId, msg.sender),
            "Token owner can't buy their own token"
        );
        require(
            msg.value >= listing.value,
            "The value send is below sale price"
        );

        (uint256 _serviceFee, uint256 _royaltyFee) = _calculateFees(
            erc721Address,
            listing.value
        );

        Address.sendValue(
            payable(listing.seller),
            msg.value - _serviceFee - _royaltyFee
        );
        Address.sendValue(payable(owner()), _serviceFee);

        address _royaltyRecipient = royalty(erc721Address).recipient;
        if (_royaltyRecipient != address(0) && _royaltyFee > 0) {
            Address.sendValue(payable(_royaltyRecipient), _royaltyFee);
        }

        // Send token to buyer
        emit TokenBought({
            erc721Address: erc721Address,
            tokenId: tokenId,
            buyer: msg.sender,
            listing: listing,
            serviceFee: _serviceFee,
            royaltyFee: _royaltyFee
        });

        IERC721(erc721Address).safeTransferFrom(
            listing.seller,
            msg.sender,
            tokenId
        );

        // Remove token listing
        _delistToken(erc721Address, tokenId);
        _removeBidOfBidder(erc721Address, tokenId, msg.sender);
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-enterBidForToken}.
     * People can only enter bid if bid is valid
     */
    function enterBidForToken(
        address erc721Address,
        uint256 tokenId,
        uint256 value,
        uint256 expireTimestamp
    )
        external
        override
        onlyTradingOpen
        onlyAllowedExpireTimestamp(expireTimestamp)
    {
        Bid memory bid = Bid(tokenId, value, msg.sender, expireTimestamp);

        require(_isBidValid(erc721Address, bid), "Bid is not valid");

        _erc721Market[erc721Address].tokenIdWithBid.add(tokenId);
        _erc721Market[erc721Address].bids[tokenId].bidders.add(msg.sender);
        _erc721Market[erc721Address].bids[tokenId].bids[msg.sender] = bid;

        emit TokenBidEntered(erc721Address, tokenId, bid);
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-withdrawBidForToken}.
     * There must be a bid exists
     * remove this bid record
     */
    function withdrawBidForToken(address erc721Address, uint256 tokenId)
        external
        override
    {
        Bid memory bid = _erc721Market[erc721Address].bids[tokenId].bids[
            msg.sender
        ];
        require(
            bid.bidder == msg.sender,
            "This address doesn't have bid on this token"
        );

        emit TokenBidWithdrawn(erc721Address, tokenId, bid);
        _removeBidOfBidder(erc721Address, tokenId, msg.sender);
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-acceptBidForToken}.
     * Must be owner of this token
     * Must have approved this contract to transfer token
     * Must have a valid existing bid that matches
     */
    function acceptBidForToken(
        address erc721Address,
        uint256 tokenId,
        address bidder,
        uint256 value
    ) external override nonReentrant {
        require(
            _isTokenOwner(erc721Address, tokenId, msg.sender),
            "Only token owner can accept bid of token"
        );
        require(
            _isTokenApproved(erc721Address, tokenId) ||
                _isAllTokenApproved(erc721Address, msg.sender),
            "The token is not approved to transfer by the contract"
        );

        Bid memory existingBid = getBidderTokenBid(
            erc721Address,
            tokenId,
            bidder
        );
        require(
            existingBid.tokenId == tokenId &&
                existingBid.value == value &&
                existingBid.bidder == bidder,
            "This token doesn't have a matching bid"
        );

        address _royaltyRecipient = royalty(erc721Address).recipient;
        (uint256 _serviceFee, uint256 _royaltyFee) = _calculateFees(
            erc721Address,
            existingBid.value
        );

        _paymentToken.safeTransferFrom({
            from: existingBid.bidder,
            to: msg.sender,
            value: existingBid.value - _serviceFee - _royaltyFee
        });
        _paymentToken.safeTransferFrom({
            from: existingBid.bidder,
            to: owner(),
            value: _serviceFee
        });
        if (_royaltyRecipient != address(0) && _royaltyFee > 0) {
            _paymentToken.safeTransferFrom({
                from: existingBid.bidder,
                to: _royaltyRecipient,
                value: _royaltyFee
            });
        }

        IERC721(erc721Address).safeTransferFrom({
            from: msg.sender,
            to: existingBid.bidder,
            tokenId: tokenId
        });

        emit TokenBidAccepted({
            erc721Address: erc721Address,
            tokenId: tokenId,
            seller: msg.sender,
            bid: existingBid,
            serviceFee: _serviceFee,
            royaltyFee: _royaltyFee
        });

        // Remove token listing
        _delistToken(erc721Address, tokenId);
        _removeBidOfBidder(erc721Address, tokenId, existingBid.bidder);
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-isTradingEnabled}.
     */
    function isTradingEnabled() external view override returns (bool) {
        return _isTradingEnabled;
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-getTokenListing}.
     */
    function getTokenListing(address erc721Address, uint256 tokenId)
        public
        view
        override
        returns (Listing memory validListing)
    {
        Listing memory listing = _erc721Market[erc721Address].listings[tokenId];
        if (_isListingValid(erc721Address, listing)) {
            validListing = listing;
        }
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-numTokenListings}.
     */
    function numTokenListings(address erc721Address)
        public
        view
        override
        returns (uint256)
    {
        return _erc721Market[erc721Address].tokenIdWithListing.length();
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-getTokenListings}.
     */
    function getTokenListings(
        address erc721Address,
        uint256 from,
        uint256 size
    ) public view override returns (Listing[] memory listings) {
        uint256 listingsCount = numTokenListings(erc721Address);

        if (from < listingsCount && size > 0) {
            uint256 querySize = size;
            if ((from + size) > listingsCount) {
                querySize = listingsCount - from;
            }
            listings = new Listing[](querySize);
            for (uint256 i = 0; i < querySize; i++) {
                uint256 tokenId = _erc721Market[erc721Address]
                    .tokenIdWithListing
                    .at(i + from);
                Listing memory listing = _erc721Market[erc721Address].listings[
                    tokenId
                ];
                if (_isListingValid(erc721Address, listing)) {
                    listings[i] = listing;
                }
            }
        }
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-getBidderTokenBid}.
     */
    function getBidderTokenBid(
        address erc721Address,
        uint256 tokenId,
        address bidder
    ) public view override returns (Bid memory validBid) {
        Bid memory bid = _erc721Market[erc721Address].bids[tokenId].bids[
            bidder
        ];
        if (_isBidValid(erc721Address, bid)) {
            validBid = bid;
        }
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-getTokenBids}.
     */
    function getTokenBids(address erc721Address, uint256 tokenId)
        external
        view
        override
        returns (Bid[] memory bids)
    {
        uint256 bidderCount = _erc721Market[erc721Address]
            .bids[tokenId]
            .bidders
            .length();

        bids = new Bid[](bidderCount);
        for (uint256 i; i < bidderCount; i++) {
            address bidder = _erc721Market[erc721Address]
                .bids[tokenId]
                .bidders
                .at(i);
            Bid memory bid = _erc721Market[erc721Address].bids[tokenId].bids[
                bidder
            ];
            if (_isBidValid(erc721Address, bid)) {
                bids[i] = bid;
            }
        }
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-getTokenHighestBid}.
     */
    function getTokenHighestBid(address erc721Address, uint256 tokenId)
        public
        view
        override
        returns (Bid memory highestBid)
    {
        highestBid = Bid(tokenId, 0, address(0), 0);
        uint256 bidderCount = _erc721Market[erc721Address]
            .bids[tokenId]
            .bidders
            .length();
        for (uint256 i; i < bidderCount; i++) {
            address bidder = _erc721Market[erc721Address]
                .bids[tokenId]
                .bidders
                .at(i);
            Bid memory bid = _erc721Market[erc721Address].bids[tokenId].bids[
                bidder
            ];
            if (
                _isBidValid(erc721Address, bid) && bid.value > highestBid.value
            ) {
                highestBid = bid;
            }
        }
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-numTokenWithBids}.
     */
    function numTokenWithBids(address erc721Address)
        public
        view
        override
        returns (uint256)
    {
        return _erc721Market[erc721Address].tokenIdWithBid.length();
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-getTokenHighestBids}.
     */
    function getTokenHighestBids(
        address erc721Address,
        uint256 from,
        uint256 size
    ) public view override returns (Bid[] memory highestBids) {
        uint256 tokenCount = numTokenWithBids(erc721Address);

        if (from < tokenCount && size > 0) {
            uint256 querySize = size;
            if ((from + size) > tokenCount) {
                querySize = tokenCount - from;
            }
            highestBids = new Bid[](querySize);
            for (uint256 i = 0; i < querySize; i++) {
                highestBids[i] = getTokenHighestBid({
                    erc721Address: erc721Address,
                    tokenId: _erc721Market[erc721Address].tokenIdWithBid.at(
                        i + from
                    )
                });
            }
        }
    }

    function getBidderBids(
        address erc721Address,
        address bidder,
        uint256 from,
        uint256 size
    ) external view override returns (Bid[] memory bidderBids) {
        uint256 tokenCount = numTokenWithBids(erc721Address);

        if (from < tokenCount && size > 0) {
            uint256 querySize = size;
            if ((from + size) > tokenCount) {
                querySize = tokenCount - from;
            }
            bidderBids = new Bid[](querySize);
            for (uint256 i = 0; i < querySize; i++) {
                bidderBids[i] = getBidderTokenBid({
                    erc721Address: erc721Address,
                    tokenId: _erc721Market[erc721Address].tokenIdWithBid.at(
                        i + from
                    ),
                    bidder: bidder
                });
            }
        }
    }

    /**
     * @dev check if the account is the owner of this erc721 token
     */
    function _isTokenOwner(
        address erc721Address,
        uint256 tokenId,
        address account
    ) private view returns (bool) {
        IERC721 _erc721 = IERC721(erc721Address);
        try _erc721.ownerOf(tokenId) returns (address tokenOwner) {
            return tokenOwner == account;
        } catch {
            return false;
        }
    }

    /**
     * @dev check if this contract has approved to transfer this erc721 token
     */
    function _isTokenApproved(address erc721Address, uint256 tokenId)
        private
        view
        returns (bool)
    {
        IERC721 _erc721 = IERC721(erc721Address);
        try _erc721.getApproved(tokenId) returns (address tokenOperator) {
            return tokenOperator == address(this);
        } catch {
            return false;
        }
    }

    /**
     * @dev check if this contract has approved to all of this owner's erc721 tokens
     */
    function _isAllTokenApproved(address erc721Address, address owner)
        private
        view
        returns (bool)
    {
        IERC721 _erc721 = IERC721(erc721Address);
        return _erc721.isApprovedForAll(owner, address(this));
    }

    /**
     * @dev Check if a listing is valid or not
     * The seller must be the owner
     * The seller must have give this contract allowance
     * The sell price must be more than 0
     * The listing mustn't be expired
     */
    function _isListingValid(address erc721Address, Listing memory listing)
        private
        view
        returns (bool isValid)
    {
        if (
            _isTokenOwner(erc721Address, listing.tokenId, listing.seller) &&
            (_isTokenApproved(erc721Address, listing.tokenId) ||
                _isAllTokenApproved(erc721Address, listing.seller)) &&
            listing.value > 0 &&
            listing.expireTimestamp > block.timestamp
        ) {
            isValid = true;
        }
    }

    /**
     * @dev Check if an bid is valid or not
     * Bidder must not be the owner
     * Bidder must have enough balance same or more than bid price
     * Bidder must give the contract allowance same or more than bid price
     * Bid price must > 0
     * Bid mustn't been expired
     */
    function _isBidValid(address erc721Address, Bid memory bid)
        private
        view
        returns (bool isValid)
    {
        if (
            !_isTokenOwner(erc721Address, bid.tokenId, bid.bidder) &&
            _paymentToken.allowance(bid.bidder, address(this)) >= bid.value &&
            _paymentToken.balanceOf(bid.bidder) >= bid.value &&
            bid.value > 0 &&
            bid.expireTimestamp > block.timestamp
        ) {
            isValid = true;
        }
    }

    /**
     * @dev delist a token - remove token id record and remove listing from mapping
     * @param tokenId erc721 token Id
     */
    function _delistToken(address erc721Address, uint256 tokenId) private {
        if (_erc721Market[erc721Address].tokenIdWithListing.contains(tokenId)) {
            delete _erc721Market[erc721Address].listings[tokenId];
            _erc721Market[erc721Address].tokenIdWithListing.remove(tokenId);
        }
    }

    /**
     * @dev remove a bid of a bidder
     * @param tokenId erc721 token Id
     * @param bidder bidder address
     */
    function _removeBidOfBidder(
        address erc721Address,
        uint256 tokenId,
        address bidder
    ) private {
        if (
            _erc721Market[erc721Address].bids[tokenId].bidders.contains(bidder)
        ) {
            // Step 1: delete the bid and the address
            delete _erc721Market[erc721Address].bids[tokenId].bids[bidder];
            _erc721Market[erc721Address].bids[tokenId].bidders.remove(bidder);

            // Step 2: if no bid left
            if (
                _erc721Market[erc721Address].bids[tokenId].bidders.length() == 0
            ) {
                _erc721Market[erc721Address].tokenIdWithBid.remove(tokenId);
            }
        }
    }

    /**
     * @dev Calculate service fee, royalty fee and left value
     * @param value bidder address
     */
    function _calculateFees(address erc721Address, uint256 value)
        private
        view
        returns (uint256 _serviceFee, uint256 _royaltyFee)
    {
        uint256 _royaltyFeeFraction = royalty(erc721Address).feeFraction;
        uint256 _baseFractions = 1000 +
            _serviceFeeFraction +
            _royaltyFeeFraction;

        _serviceFee = (value * _serviceFeeFraction) / _baseFractions;
        _royaltyFee = (value * _royaltyFeeFraction) / _baseFractions;
    }

    /**
     * @dev Enable to disable Bids and Listing
     */
    function changeMarketplaceStatus(bool enabled) external onlyOwner {
        _isTradingEnabled = enabled;
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-actionTimeOutRangeMin}.
     */
    function actionTimeOutRangeMin() external view override returns (uint256) {
        return _actionTimeOutRangeMin;
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-actionTimeOutRangeMax}.
     */
    function actionTimeOutRangeMax() external view override returns (uint256) {
        return _actionTimeOutRangeMax;
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-paymentToken}.
     */
    function paymentToken() external view override returns (address) {
        return address(_paymentToken);
    }

    /**
     * @dev Change minimum listing and bid time range
     */
    function changeMinActionTimeLimit(uint256 timeInSec) external onlyOwner {
        _actionTimeOutRangeMin = timeInSec;
    }

    /**
     * @dev Change maximum listing and bid time range
     */
    function changeMaxActionTimeLimit(uint256 timeInSec) external onlyOwner {
        _actionTimeOutRangeMax = timeInSec;
    }

    /**
     * @dev See {INFTKEYMarketplaceV2-serviceFee}.
     */
    function serviceFee() external view override returns (uint8) {
        return _serviceFeeFraction;
    }

    /**
     * @dev Change withdrawal fee percentage.
     * @param serviceFeeFraction_ Fraction of withdrawal fee based on 1000
     */
    function changeSeriveFee(uint8 serviceFeeFraction_) external onlyOwner {
        require(
            serviceFeeFraction_ <= 25,
            "Attempt to set percentage higher than 2.5%."
        );

        _serviceFeeFraction = serviceFeeFraction_;
    }
}

// SPDX-License-Identifier: AGPL-3.0-or-later

pragma solidity =0.8.9;
pragma abicoder v2;

import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";

interface INFTKEYMarketplaceV2 {
    struct Listing {
        uint256 tokenId;
        uint256 value;
        address seller;
        uint256 expireTimestamp;
    }

    struct Bid {
        uint256 tokenId;
        uint256 value;
        address bidder;
        uint256 expireTimestamp;
    }

    struct TokenBids {
        EnumerableSet.AddressSet bidders;
        mapping(address => Bid) bids;
    }

    struct ERC721Market {
        EnumerableSet.UintSet tokenIdWithListing;
        mapping(uint256 => Listing) listings;
        EnumerableSet.UintSet tokenIdWithBid;
        mapping(uint256 => TokenBids) bids;
    }

    event TokenListed(
        address indexed erc721Address,
        uint256 indexed tokenId,
        Listing listing
    );
    event TokenDelisted(
        address indexed erc721Address,
        uint256 indexed tokenId,
        Listing listing
    );
    event TokenBidEntered(
        address indexed erc721Address,
        uint256 indexed tokenId,
        Bid bid
    );
    event TokenBidWithdrawn(
        address indexed erc721Address,
        uint256 indexed tokenId,
        Bid bid
    );
    event TokenBought(
        address indexed erc721Address,
        uint256 indexed tokenId,
        address indexed buyer,
        Listing listing,
        uint256 serviceFee,
        uint256 royaltyFee
    );
    event TokenBidAccepted(
        address indexed erc721Address,
        uint256 indexed tokenId,
        address indexed seller,
        Bid bid,
        uint256 serviceFee,
        uint256 royaltyFee
    );

    /**
     * @dev List token for sale
     * @param tokenId erc721 token Id
     * @param value min price to sell the token
     * @param expireTimestamp when would this listing expire
     */
    function listToken(
        address erc721Address,
        uint256 tokenId,
        uint256 value,
        uint256 expireTimestamp
    ) external;

    /**
     * @dev Delist token for sale
     * @param tokenId erc721 token Id
     */
    function delistToken(address erc721Address, uint256 tokenId) external;

    /**
     * @dev Buy token
     * @param tokenId erc721 token Id
     */
    function buyToken(address erc721Address, uint256 tokenId) external payable;

    /**
     * @dev Enter bid for token
     * @param tokenId erc721 token Id
     * @param value price in payment token
     * @param expireTimestamp when would this bid expire
     */
    function enterBidForToken(
        address erc721Address,
        uint256 tokenId,
        uint256 value,
        uint256 expireTimestamp
    ) external;

    /**
     * @dev Withdraw bid for token
     * @param tokenId erc721 token Id
     */
    function withdrawBidForToken(address erc721Address, uint256 tokenId)
        external;

    /**
     * @dev Accept a bid of token from a bidder
     * @param tokenId erc721 token Id
     * @param bidder bidder address
     * @param value value of a bid to avoid frontrun attack
     */
    function acceptBidForToken(
        address erc721Address,
        uint256 tokenId,
        address bidder,
        uint256 value
    ) external;

    /**
     * @dev Show if listing and bid are enabled
     */
    function isTradingEnabled() external view returns (bool);

    /**
     * @dev get current listing of a token
     * @param tokenId erc721 token Id
     * @return current valid listing or empty listing struct
     */
    function getTokenListing(address erc721Address, uint256 tokenId)
        external
        view
        returns (Listing memory);

    /**
     * @dev get count of listings
     */
    function numTokenListings(address erc721Address)
        external
        view
        returns (uint256);

    /**
     * @dev get current valid listings by size
     * @param from index to start
     * @param size size to query
     * @return current valid listings
     * This to help batch query when list gets big
     */
    function getTokenListings(
        address erc721Address,
        uint256 from,
        uint256 size
    ) external view returns (Listing[] memory);

    /**
     * @dev get bidder's bid on a token
     * @param tokenId erc721 token Id
     * @param bidder address of a bidder
     * @return Valid bid or empty bid
     */
    function getBidderTokenBid(
        address erc721Address,
        uint256 tokenId,
        address bidder
    ) external view returns (Bid memory);

    /**
     * @dev get all valid bids of a token
     * @param tokenId erc721 token Id
     * @return Valid bids of a token
     */
    function getTokenBids(address erc721Address, uint256 tokenId)
        external
        view
        returns (Bid[] memory);

    /**
     * @dev get count of tokens with bid(s)
     */
    function numTokenWithBids(address erc721Address)
        external
        view
        returns (uint256);

    /**
     * @dev get highest bid of a token
     * @param tokenId erc721 token Id
     * @return Valid highest bid or empty bid
     */
    function getTokenHighestBid(address erc721Address, uint256 tokenId)
        external
        view
        returns (Bid memory);

    /**
     * @dev get current highest bids
     * @param from index to start
     * @param size size to query
     * @return current highest bids
     * This to help batch query when list gets big
     */
    function getTokenHighestBids(
        address erc721Address,
        uint256 from,
        uint256 size
    ) external view returns (Bid[] memory);

    /**
     * @dev get all bids of a bidder address
     * @return All valid bids of a bidder
     */
    function getBidderBids(
        address erc721Address,
        address bidder,
        uint256 from,
        uint256 size
    ) external view returns (Bid[] memory);

    /**
     * @dev Surface minimum listing and bid time range
     */
    function actionTimeOutRangeMin() external view returns (uint256);

    /**
     * @dev Surface maximum listing and bid time range
     */
    function actionTimeOutRangeMax() external view returns (uint256);

    /**
     * @dev Payment token address
     */
    function paymentToken() external view returns (address);

    /**
     * @dev Service fee
     * @return fee fraction based on 1000
     */
    function serviceFee() external view returns (uint8);
}

// SPDX-License-Identifier: AGPL-3.0-or-later

pragma solidity =0.8.9;
pragma abicoder v2;

interface INFTKEYMarketplaceRoyalty {
    struct ERC721CollectionRoyalty {
        address recipient;
        uint256 feeFraction;
        address setBy;
    }

    // Who can set: ERC721 owner and NFTKEY owner
    event SetRoyalty(
        address indexed erc721Address,
        address indexed recipient,
        uint256 feeFraction
    );

    /**
     * @dev Royalty fee
     * @param erc721Address to read royalty
     * @return royalty information
     */
    function royalty(address erc721Address)
        external
        view
        returns (ERC721CollectionRoyalty memory);

    /**
     * @dev Royalty fee
     * @param erc721Address to read royalty
     */
    function setRoyalty(
        address erc721Address,
        address recipient,
        uint256 feeFraction
    ) external;
}

// SPDX-License-Identifier: AGPL-3.0-or-later

pragma solidity =0.8.9;
pragma abicoder v2;

import "@openzeppelin/contracts/access/Ownable.sol";
import "./interface/INFTKEYMarketplaceRoyalty.sol";

contract NFTKEYMarketplaceRoyalty is INFTKEYMarketplaceRoyalty, Ownable {
    uint256 public defaultRoyaltyFraction = 20; // By the factor of 1000, 2%
    uint256 public royaltyUpperLimit = 80; // By the factor of 1000, 8%

    mapping(address => ERC721CollectionRoyalty) private _collectionRoyalty;

    function _erc721Owner(address erc721Address)
        private
        view
        returns (address)
    {
        try Ownable(erc721Address).owner() returns (address _contractOwner) {
            return _contractOwner;
        } catch {
            return address(0);
        }
    }

    function royalty(address erc721Address)
        public
        view
        override
        returns (ERC721CollectionRoyalty memory)
    {
        if (_collectionRoyalty[erc721Address].setBy != address(0)) {
            return _collectionRoyalty[erc721Address];
        }

        address erc721Owner = _erc721Owner(erc721Address);
        if (erc721Owner != address(0)) {
            return
                ERC721CollectionRoyalty({
                    recipient: erc721Owner,
                    feeFraction: defaultRoyaltyFraction,
                    setBy: address(0)
                });
        }

        return
            ERC721CollectionRoyalty({
                recipient: address(0),
                feeFraction: 0,
                setBy: address(0)
            });
    }

    function setRoyalty(
        address erc721Address,
        address newRecipient,
        uint256 feeFraction
    ) external override {
        require(
            feeFraction <= royaltyUpperLimit,
            "Please set the royalty percentange below allowed range"
        );

        require(
            msg.sender == royalty(erc721Address).recipient,
            "Only ERC721 royalty recipient is allowed to set Royalty"
        );

        _collectionRoyalty[erc721Address] = ERC721CollectionRoyalty({
            recipient: newRecipient,
            feeFraction: feeFraction,
            setBy: msg.sender
        });

        emit SetRoyalty({
            erc721Address: erc721Address,
            recipient: newRecipient,
            feeFraction: feeFraction
        });
    }

    function setRoyaltyForCollection(
        address erc721Address,
        address newRecipient,
        uint256 feeFraction
    ) external onlyOwner {
        require(
            feeFraction <= royaltyUpperLimit,
            "Please set the royalty percentange below allowed range"
        );

        require(
            royalty(erc721Address).setBy == address(0),
            "Collection royalty recipient already set"
        );

        _collectionRoyalty[erc721Address] = ERC721CollectionRoyalty({
            recipient: newRecipient,
            feeFraction: feeFraction,
            setBy: msg.sender
        });

        emit SetRoyalty({
            erc721Address: erc721Address,
            recipient: newRecipient,
            feeFraction: feeFraction
        });
    }

    function updateRoyaltyUpperLimit(uint256 _newUpperLimit)
        external
        onlyOwner
    {
        royaltyUpperLimit = _newUpperLimit;
    }
}

// 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 EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

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

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

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

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

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

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

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

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

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

            return true;
        } else {
            return false;
        }
    }

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

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

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

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

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

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

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

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

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

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

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        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
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

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

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

pragma solidity ^0.8.0;

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

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

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

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

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

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

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, 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 v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

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

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

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

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

    function safeIncreaseAllowance(
        IERC20 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(
        IERC20 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(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        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 (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 IERC20 {
    /**
     * @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 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

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

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

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

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

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

pragma solidity ^0.8.0;

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

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

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

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

    /**
     * @dev 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);
    }
}

{
  "remappings": [],
  "optimizer": {
    "enabled": true,
    "runs": 999999
  },
  "evmVersion": "london",
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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INFTKEYMarketplaceV2.Bid","name":"highestBid","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"erc721Address","type":"address"},{"internalType":"uint256","name":"from","type":"uint256"},{"internalType":"uint256","name":"size","type":"uint256"}],"name":"getTokenHighestBids","outputs":[{"components":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"address","name":"bidder","type":"address"},{"internalType":"uint256","name":"expireTimestamp","type":"uint256"}],"internalType":"struct INFTKEYMarketplaceV2.Bid[]","name":"highestBids","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"erc721Address","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getTokenListing","outputs":[{"components":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"address","name":"seller","type":"address"},{"internalType":"uint256","name":"expireTimestamp","type":"uint256"}],"internalType":"struct INFTKEYMarketplaceV2.Listing","name":"validListing","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"erc721Address","type":"address"},{"internalType":"uint256","name":"from","type":"uint256"},{"internalType":"uint256","name":"size","type":"uint256"}],"name":"getTokenListings","outputs":[{"components":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"address","name":"seller","type":"address"},{"internalType":"uint256","name":"expireTimestamp","type":"uint256"}],"internalType":"struct INFTKEYMarketplaceV2.Listing[]","name":"listings","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isTradingEnabled","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"erc721Address","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"expireTimestamp","type":"uint256"}],"name":"listToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"erc721Address","type":"address"}],"name":"numTokenListings","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"erc721Address","type":"address"}],"name":"numTokenWithBids","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"paymentToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"erc721Address","type":"address"}],"name":"royalty","outputs":[{"components":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"feeFraction","type":"uint256"},{"internalType":"address","name":"setBy","type":"address"}],"internalType":"struct INFTKEYMarketplaceRoyalty.ERC721CollectionRoyalty","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"royaltyUpperLimit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"serviceFee","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"erc721Address","type":"address"},{"internalType":"address","name":"newRecipient","type":"address"},{"internalType":"uint256","name":"feeFraction","type":"uint256"}],"name":"setRoyalty","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"erc721Address","type":"address"},{"internalType":"address","name":"newRecipient","type":"address"},{"internalType":"uint256","name":"feeFraction","type":"uint256"}],"name":"setRoyaltyForCollection","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_newUpperLimit","type":"uint256"}],"name":"updateRoyaltyUpperLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"erc721Address","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"withdrawBidForToken","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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0000000000000000000000000d500b1d8e8ef31e21c99d1db9a6444d3adf1270

-----Decoded View---------------
Arg [0] : _paymentTokenAddress (address): 0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000d500b1d8e8ef31e21c99d1db9a6444d3adf1270