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// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {SafeMath} from "@openzeppelin/contracts/utils/math/SafeMath.sol";
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
import {Counters} from "@openzeppelin/contracts/utils/Counters.sol";
import {ERC1155Holder} from "@openzeppelin/contracts/token/ERC1155/utils/ERC1155Holder.sol";
import {ERC721Holder} from "@openzeppelin/contracts/token/ERC721/utils/ERC721Holder.sol";
import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import {IERC721} from "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import {IERC1155} from "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
import {Auction, Asset, AuctionStatus, AuctionType} from "./lib/AuctionStructs.sol";
import {IWhitelistRegistry} from "./interfaces/IWhitelistRegistry.sol";

contract AuctionHouse is Ownable, ReentrancyGuard, ERC721Holder, ERC1155Holder {
    using SafeMath for uint256;
    using Math for uint256;
    using Counters for Counters.Counter;
    // ERC721 interfaceID
    bytes4 public constant INTERFACE_ID_ERC721 = 0x80ac58cd;
    // ERC1155 interfaceID
    bytes4 public constant INTERFACE_ID_ERC1155 = 0xd9b67a26;

    address public protocolFeeRecipient;
    uint256 public protocolFee;
    uint256 public penaltyFee;
    uint256 public maxLotSize;
    bool public allowListings = false;
    bool public isBeta = true;

    mapping(uint256 => Auction) public auctions;
    mapping(uint256 => Asset[]) public assets;

    Counters.Counter public totalAuctionCount;
    Counters.Counter public totalBidCount;

    address private whitelistRegistry;

    event AuctionCreated(uint256 indexed auctionId, address indexed seller);
    event AuctionCancelled(uint256 indexed auctionId);
    event AuctionReverted(uint256 indexed auctionId);
    event AuctionSettled(
        uint256 indexed auctionId,
        address indexed seller,
        address indexed buyer,
        uint256 price
    );
    event AuctionUpdated(uint256 indexed auctionId);
    event BidCreated(
        uint256 indexed auctionId,
        address indexed bidder,
        address indexed seller,
        uint256 price,
        bool reserveMet
    );

    error InvalidBid();

    modifier openAuction(uint256 auctionId) {
        require(
            auctions[auctionId].status == AuctionStatus.ACTIVE,
            "Auction is not open"
        );
        _;
    }

    modifier nonExpiredAuction(uint256 auctionId) {
        require(
            auctions[auctionId].endDate >= block.timestamp,
            "Auction already expired"
        );
        _;
    }

    modifier expiredAuction(uint256 auctionId) {
        require(
            auctions[auctionId].endDate < block.timestamp,
            "Auction has not expired yet"
        );
        _;
    }

    modifier onlySeller(uint256 auctionId) {
        require(msg.sender == auctions[auctionId].seller, "Not seller");
        _;
    }

    modifier notSeller(uint256 auctionId) {
        require(
            msg.sender != auctions[auctionId].seller,
            "Cannot be called by seller"
        );
        _;
    }

    modifier nonContract() {
        require(msg.sender == tx.origin, "Cannot be called by contract");
        _;
    }

    modifier canList() {
        require(
            !isBeta ||
                IWhitelistRegistry(whitelistRegistry).checkWhitelistStatus(
                    msg.sender
                ) ==
                true,
            "Not whitelisted"
        );
        _;
    }

    constructor(
        address _protocolFeeRecipient,
        address _whitelistRegistry,
        uint256 _protocolFee,
        uint256 _penaltyFee,
        uint256 _maxLotSize
    ) {
        protocolFeeRecipient = _protocolFeeRecipient;
        whitelistRegistry = _whitelistRegistry;
        protocolFee = _protocolFee;
        penaltyFee = _penaltyFee;
        maxLotSize = _maxLotSize;
    }

    /**
     * @notice Creates an auction
     * @dev client should group all ERC1155 with the same ids in one asset struct and update qty as needed
     * @param _assets assets to include in the auction lot (tokenAddress, tokenId, qty)
     * @param _startingPrice starting auction price. First bid must be greater than this value
     * @param _reservePrice lowest price seller is willing to sell at.
     * @param _startDate scheduled startDate. To start immediately set a value that is less than or equal to the current timestamp
     * @param _endDate scheduled endDate. Must be greater than the startDate and the current block timestamp
     */
    function createAuction(
        Asset[] calldata _assets,
        uint256 _startingPrice,
        uint256 _reservePrice,
        uint256 _minBidThreshold,
        uint256 _startDate,
        uint256 _endDate,
        bool _isExtendedType
    ) public canList nonContract returns (uint256 auctionId) {
        require(
            _endDate > block.timestamp,
            "Auction end date cannot be set in the past"
        );
        require(_endDate > _startDate, "Start date greater than end date");
        require(allowListings, "Auction creation paused");
        require(_assets.length <= maxLotSize, "Max lot size exceeded");
        require(_assets.length >= 1, "Auction must containt at least 1 asset");
        totalAuctionCount.increment();
        auctionId = totalAuctionCount.current();

        for (uint256 i; i < _assets.length; i++) {
            Asset calldata targetAsset = _assets[i];
            Asset memory newAsset = Asset(
                targetAsset.tokenAddress,
                targetAsset.tokenId,
                targetAsset.qty
            );
            assets[auctionId].push(newAsset);
        }

        auctions[auctionId] = Auction(
            auctionId,
            _startingPrice,
            _reservePrice,
            _minBidThreshold,
            msg.sender,
            Math.max(_startDate, block.timestamp),
            _endDate,
            _startingPrice,
            address(0),
            AuctionStatus.ACTIVE,
            _isExtendedType ? AuctionType.EXTENDED : AuctionType.ABSOLUTE
        );
        _transferAssets(_assets, msg.sender, address(this));
        emit AuctionCreated(auctionId, msg.sender);
        return auctionId;
    }

    /**
     * @notice Creates bid tied to a specific auction. Bid amount will be the value of msg.value
     * @param _auctionId auctionId
     * @return bidId ID of the newly created bid
     */
    function createBid(
        uint256 _auctionId
    )
        public
        payable
        nonReentrant
        nonContract
        openAuction(_auctionId)
        notSeller(_auctionId)
        nonExpiredAuction(_auctionId)
        returns (uint256 bidId)
    {
        Auction storage auction = auctions[_auctionId];

        // opening bid check
        if (auction.topBidder == address(0)) {
            if (msg.value < auction.startingPrice) {
                revert InvalidBid();
            }
        } else {
            // non-opening bid check
            if (auction.minBidThreshold == 0 && msg.value <= auction.topBid) {
                revert InvalidBid();
            } else if (
                auction.minBidThreshold > 0 &&
                auction.topBid.add(auction.minBidThreshold) > msg.value
            ) {
                revert InvalidBid();
            }
        }

        bool reserveMet = msg.value > auction.reservePrice;

        if (auction.topBidder != address(0)) {
            payable(auction.topBidder).transfer(auction.topBid);
        }

        auction.topBid = msg.value;
        auction.topBidder = msg.sender;

        if (auction.auctionType == AuctionType.EXTENDED)
            _extendAuction(_auctionId);

        emit BidCreated(
            _auctionId,
            msg.sender,
            auction.seller,
            msg.value,
            reserveMet
        );
        return bidId;
    }

    function increaseBid(uint256 _auctionId) public payable {
        Auction storage auction = auctions[_auctionId];

        require(msg.sender == auction.topBidder, "Not top bidder");
        require(msg.value > 0, "New bid must be greater than preivous");
        require(
            auction.status == AuctionStatus.ACTIVE &&
                auction.endDate >= block.timestamp,
            "Auction is not active"
        );
        if (msg.value == 0 || msg.value < auction.minBidThreshold) {
            revert InvalidBid();
        }
        auction.topBid = auction.topBid.add(msg.value);
        if (auction.auctionType == AuctionType.EXTENDED)
            _extendAuction(_auctionId);

        emit BidCreated(
            _auctionId,
            msg.sender,
            auction.seller,
            auction.topBid,
            (auction.topBid > auction.reservePrice)
        );
    }

    /**
     * @notice Cancels an auction and pays out penalty (if applicable)
     * @dev Only callable by seller. If bid exists, seller will need to pay a penalty which will go to the curent top bidder
     * @param _auctionId ID of the auction to cancel
     */
    function cancelAuction(
        uint256 _auctionId
    )
        public
        payable
        nonReentrant
        nonExpiredAuction(_auctionId)
        openAuction(_auctionId)
        onlySeller(_auctionId)
    {
        Auction storage auction = auctions[_auctionId];
        Asset[] memory _assets = assets[_auctionId];

        uint256 penalty = _calculatePenaltyFees(auction.topBid);

        if (auction.topBidder != address(0) && auction.topBid > 0) {
            require(msg.value >= penalty, "Incorrect penalty fee");
            payable(auction.topBidder).transfer(penalty.add(auction.topBid));
            if (msg.value.sub(penalty) > 0) {
                payable(msg.sender).transfer(msg.value.sub(penalty));
            }
        }

        auction.status = AuctionStatus.CANCELLED;
        auction.endDate = block.timestamp;
        _transferAssets(_assets, address(this), auction.seller);
        emit AuctionCancelled(_auctionId);
    }

    /**
     * @notice For seller to change the reserve price.
     * @dev Only callable by seller. New reserve price must be lower than previous reserve.
     * @param _auctionId ID of the auction to change reserve price for
     * @param _reservePrice new reserve price
     */
    function changeReservePrice(
        uint256 _auctionId,
        uint256 _reservePrice
    ) public onlySeller(_auctionId) openAuction(_auctionId) {
        Auction storage auction = auctions[_auctionId];
        require(
            _reservePrice < auction.reservePrice,
            "New reserve price too high"
        );
        auction.reservePrice = _reservePrice;
        emit AuctionUpdated(_auctionId);
    }

    /**
     * @notice Callable by anyone to settle auctions
     * @dev This function is used as both redeem and claim. Function handles all necessary payouts and transfers
     * @param _auctionId ID of the auction to settle
     */
    function settleAuction(
        uint256 _auctionId
    )
        public
        payable
        nonReentrant
        openAuction(_auctionId)
        expiredAuction(_auctionId)
    {
        Auction storage auction = auctions[_auctionId];

        if (auction.topBidder != address(0)) {
            if (auction.topBid >= auction.reservePrice) {
                uint256 protocolFeeValue = _calculateProtocolFees(
                    auction.topBid
                );
                payable(protocolFeeRecipient).transfer(protocolFeeValue);
                payable(auction.seller).transfer(
                    auction.topBid.sub(protocolFeeValue)
                );
                _transferAuctionAssets(
                    _auctionId,
                    address(this),
                    auction.topBidder
                );
            } else {
                // return funds to top bidder;
                payable(auction.topBidder).transfer(auction.topBid);
                // return assets to seller;
                _transferAssets(
                    assets[_auctionId],
                    address(this),
                    auction.seller
                );
            }
        } else {
            // return assets to seller
            _transferAuctionAssets(_auctionId, address(this), auction.seller);
        }

        auction.status = AuctionStatus.SETTLED;
        emit AuctionSettled(
            _auctionId,
            auction.seller,
            auction.topBidder,
            auction.topBid
        );
    }

    /**
     * @dev Internal function to handle bulk transfer of ERC721 and ERC1155 assets
     * @param _auctionId ID of the auction assets are tied to
     * @param _from address where the assets are currently held (seller or this contract)
     * @param _to address where assets should be sent to (seller, buyer, or this contract)
     */
    function _transferAuctionAssets(
        uint256 _auctionId,
        address _from,
        address _to
    ) internal {
        Asset[] memory _assets = assets[_auctionId];
        _transferAssets(_assets, _from, _to);
    }

    function _transferAssets(
        Asset[] memory _assets,
        address _from,
        address _to
    ) internal {
        uint256 numAssets = _assets.length;
        for (uint256 i; i < numAssets; i++) {
            Asset memory _asset = _assets[i];
            if (
                IERC165(_asset.tokenAddress).supportsInterface(
                    INTERFACE_ID_ERC1155
                )
            ) {
                IERC1155(_asset.tokenAddress).safeTransferFrom(
                    _from,
                    _to,
                    _asset.tokenId,
                    _asset.qty,
                    ""
                );
            } else if (
                IERC165(_asset.tokenAddress).supportsInterface(
                    INTERFACE_ID_ERC721
                )
            ) {
                IERC721(_asset.tokenAddress).safeTransferFrom(
                    _from,
                    _to,
                    _asset.tokenId
                );
            }
        }
    }

    function _calculateProtocolFees(
        uint256 amount
    ) internal view returns (uint256) {
        return ((protocolFee.mul(amount)).div(10000));
    }

    function _calculatePenaltyFees(
        uint256 amount
    ) internal view returns (uint256) {
        return ((penaltyFee.mul(amount)).div(10000));
    }

    function _extendAuction(uint256 _auctionId) internal {
        uint256 newEndDate = block.timestamp.add(5 minutes);
        auctions[_auctionId].endDate = Math.max(
            newEndDate,
            auctions[_auctionId].endDate
        );
    }

    /**
     * ============================ View functions ==========================
     */

    function getAuction(
        uint256 _auctionId
    ) public view returns (Auction memory) {
        Auction memory auction = auctions[_auctionId];
        require(
            _auctionId > 0 && auction.id == _auctionId,
            "Auction does not exist"
        );
        return auction;
    }

    function getHighestBid(
        uint256 _auctionId
    ) public view returns (uint256 bid, address bidder) {
        Auction memory auction = getAuction(_auctionId);
        require(_auctionId > 0 && auction.id != 0, "Auction does not exist");
        return (auction.topBid, auction.topBidder);
    }

    function getAuctionAssets(
        uint256 _auctionId
    ) public view returns (Asset[] memory) {
        Auction memory auction = getAuction(_auctionId);
        require(
            _auctionId > 0 && auction.id == _auctionId,
            "Auction does not exist"
        );
        return assets[_auctionId];
    }

    /**
     * ============================ Admin only functions ==========================
     */

    /**
     * @dev updates fee recipient address
     * @param _protocolFeeRecipient new few recipient address
     */
    function updateProtocolFeeRecipient(
        address _protocolFeeRecipient
    ) external onlyOwner {
        require(_protocolFeeRecipient != address(0), "Cannot be null address");
        protocolFeeRecipient = (_protocolFeeRecipient);
    }

    /**
     * @dev updates platform fee for settled auctions
     * @param _protocolFee percentage of fee 200 = 2%
     */
    function updateProtocolFee(uint256 _protocolFee) external onlyOwner {
        protocolFee = _protocolFee;
    }

    /**
     * @dev updates penalty fee for canceled auctions
     * @param _penaltyFee 200 = 2%
     */
    function updatePenaltyFee(uint256 _penaltyFee) external onlyOwner {
        penaltyFee = _penaltyFee;
    }

    /**
     * @dev toggles ability for auction creation
     * @param _allowListings if set to false nobody will be able to create auctions
     */

    function toggleAllowListings(bool _allowListings) external onlyOwner {
        allowListings = _allowListings;
    }

    /**
     * @dev flips beta mode for auction creation
     * @param _beta if set to to true only wallets listed in the wallet registry can create auctions
     */

    function toggleBeta(bool _beta) external onlyOwner {
        isBeta = _beta;
    }

    /**
     * @notice updates the maxLotSize
     * @dev this should be set low enough to ensure settlement and transfers of all assets stay well below the block limit
     * @param _maxLotSize max number of individual assets allowed to be included in an auction
     */
    function updateMaxLotSize(uint256 _maxLotSize) external onlyOwner {
        maxLotSize = _maxLotSize;
    }

    /**
     * @notice updates the whitelist registry contract address pointer
     * @param _registry address of whitelist registry contract
     */
    function updateWhitelistRegistry(address _registry) external onlyOwner {
        whitelistRegistry = _registry;
    }

    /**
     * @notice Reverts auction and returns bid funds to bidder and assets to seller.
     * @dev may be removed in the future. This should only be used in the rare instances where seller is intending to do something malicous or misleading
     * Example: Asset getting flagged by Opensea during the auction when bidders were expecting an unmarked asset.
     * @param _auctionId ID of auction
     */
    function revertAuction(
        uint256 _auctionId
    ) external onlyOwner nonExpiredAuction(_auctionId) openAuction(_auctionId) {
        Auction storage auction = auctions[_auctionId];
        if (auction.topBidder != address(0) && auction.topBid > 0) {
            payable(auction.topBidder).transfer(auction.topBid);
        }
        auction.status = AuctionStatus.CANCELLED;
        auction.endDate = block.timestamp;
        _transferAuctionAssets(_auctionId, address(this), auction.seller);
        emit AuctionReverted(_auctionId);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;

interface IWhitelistRegistry {
    function addToWhitelist(address _whitelistee) external;

    function removeFromWhitelist(address _whitelistee) external;

    function bulkAddToWhitelist(address[] calldata _whitelistees) external;

    function bulkremoveFromWhitelist(address[] calldata _whitelistees) external;

    function checkWhitelistStatus(address _whitelistee)
        external
        view
        returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.17;

enum AuctionStatus {
    NONE,
    ACTIVE,
    SETTLED,
    CANCELLED
}

enum AuctionType {
    ABSOLUTE,
    EXTENDED
}

struct Asset {
    address tokenAddress;
    uint256 tokenId;
    uint256 qty;
}

struct Auction {
    uint256 id;
    uint256 startingPrice;
    uint256 reservePrice;
    uint256 minBidThreshold;
    address seller;
    uint256 startDate;
    uint256 endDate;
    uint256 topBid;
    address topBidder;
    AuctionStatus status;
    AuctionType auctionType;
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions 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);
    }
}

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

pragma solidity ^0.8.0;

/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }

    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}

// 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 (token/ERC721/utils/ERC721Holder.sol)

pragma solidity ^0.8.0;

import "../IERC721Receiver.sol";

/**
 * @dev Implementation of the {IERC721Receiver} interface.
 *
 * Accepts all token transfers.
 * Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or {IERC721-setApprovalForAll}.
 */
contract ERC721Holder is IERC721Receiver {
    /**
     * @dev See {IERC721Receiver-onERC721Received}.
     *
     * Always returns `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address,
        address,
        uint256,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC721Received.selector;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/utils/ERC1155Holder.sol)

pragma solidity ^0.8.0;

import "./ERC1155Receiver.sol";

/**
 * Simple implementation of `ERC1155Receiver` that will allow a contract to hold ERC1155 tokens.
 *
 * IMPORTANT: When inheriting this contract, you must include a way to use the received tokens, otherwise they will be
 * stuck.
 *
 * @dev _Available since v3.1._
 */
contract ERC1155Holder is ERC1155Receiver {
    function onERC1155Received(
        address,
        address,
        uint256,
        uint256,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC1155Received.selector;
    }

    function onERC1155BatchReceived(
        address,
        address,
        uint256[] memory,
        uint256[] memory,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC1155BatchReceived.selector;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

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

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

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

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

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

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

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

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

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

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

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

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

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

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`.
        // We also know that `k`, the position of the most significant bit, is such that `msb(a) = 2**k`.
        // This gives `2**k < a <= 2**(k+1)` → `2**(k/2) <= sqrt(a) < 2 ** (k/2+1)`.
        // Using an algorithm similar to the msb conmputation, we are able to compute `result = 2**(k/2)` which is a
        // good first aproximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1;
        uint256 x = a;
        if (x >> 128 > 0) {
            x >>= 128;
            result <<= 64;
        }
        if (x >> 64 > 0) {
            x >>= 64;
            result <<= 32;
        }
        if (x >> 32 > 0) {
            x >>= 32;
            result <<= 16;
        }
        if (x >> 16 > 0) {
            x >>= 16;
            result <<= 8;
        }
        if (x >> 8 > 0) {
            x >>= 8;
            result <<= 4;
        }
        if (x >> 4 > 0) {
            x >>= 4;
            result <<= 2;
        }
        if (x >> 2 > 0) {
            result <<= 1;
        }

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// 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 v4.6.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/utils/ERC1155Receiver.sol)

pragma solidity ^0.8.0;

import "../IERC1155Receiver.sol";
import "../../../utils/introspection/ERC165.sol";

/**
 * @dev _Available since v3.1._
 */
abstract contract ERC1155Receiver is ERC165, IERC1155Receiver {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return interfaceId == type(IERC1155Receiver).interfaceId || super.supportsInterface(interfaceId);
    }
}

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

pragma solidity ^0.8.0;

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

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

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

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

pragma solidity ^0.8.0;

import "./IERC165.sol";

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

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

• No Contract Security Audit Submitted- Submit Audit Here

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AuctionStatus","name":"status","type":"uint8"},{"internalType":"enum AuctionType","name":"auctionType","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_auctionId","type":"uint256"}],"name":"cancelAuction","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_auctionId","type":"uint256"},{"internalType":"uint256","name":"_reservePrice","type":"uint256"}],"name":"changeReservePrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"qty","type":"uint256"}],"internalType":"struct Asset[]","name":"_assets","type":"tuple[]"},{"internalType":"uint256","name":"_startingPrice","type":"uint256"},{"internalType":"uint256","name":"_reservePrice","type":"uint256"},{"internalType":"uint256","name":"_minBidThreshold","type":"uint256"},{"internalType":"uint256","name":"_startDate","type":"uint256"},{"internalType":"uint256","name":"_endDate","type":"uint256"},{"internalType":"bool","name":"_isExtendedType","type":"bool"}],"name":"createAuction","outputs":[{"internalType":"uint256","name":"auctionId","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_auctionId","type":"uint256"}],"name":"createBid","outputs":[{"internalType":"uint256","name":"bidId","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_auctionId","type":"uint256"}],"name":"getAuction","outputs":[{"components":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"startingPrice","type":"uint256"},{"internalType":"uint256","name":"reservePrice","type":"uint256"},{"internalType":"uint256","name":"minBidThreshold","type":"uint256"},{"internalType":"address","name":"seller","type":"address"},{"internalType":"uint256","name":"startDate","type":"uint256"},{"internalType":"uint256","name":"endDate","type":"uint256"},{"internalType":"uint256","name":"topBid","type":"uint256"},{"internalType":"address","name":"topBidder","type":"address"},{"internalType":"enum AuctionStatus","name":"status","type":"uint8"},{"internalType":"enum AuctionType","name":"auctionType","type":"uint8"}],"internalType":"struct Auction","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_auctionId","type":"uint256"}],"name":"getAuctionAssets","outputs":[{"components":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"qty","type":"uint256"}],"internalType":"struct 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000000000000000000000000af5d6f971f26480f74384daec727d621ce55f6bd00000000000000000000000040a400a1a2910adf18ad28629ed8f629a86be5f8000000000000000000000000000000000000000000000000000000000000012c00000000000000000000000000000000000000000000000000000000000000960000000000000000000000000000000000000000000000000000000000000014

-----Decoded View---------------
Arg [0] : _protocolFeeRecipient (address): 0xAf5D6f971f26480F74384daec727d621CE55f6Bd
Arg [1] : _whitelistRegistry (address): 0x40a400a1a2910adf18ad28629eD8F629A86BE5f8
Arg [2] : _protocolFee (uint256): 300
Arg [3] : _penaltyFee (uint256): 150
Arg [4] : _maxLotSize (uint256): 20

-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 000000000000000000000000af5d6f971f26480f74384daec727d621ce55f6bd
Arg [1] : 00000000000000000000000040a400a1a2910adf18ad28629ed8f629a86be5f8
Arg [2] : 000000000000000000000000000000000000000000000000000000000000012c
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000096
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000014