// File: contracts/shared/AOTMPrivateListings.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@manifoldxyz/libraries-solidity/contracts/access/AdminControl.sol";

import "../IIdentityVerifier.sol";
import "../IIdentityVerifierCheck.sol";
import "../IMarketplaceCore.sol";
import "../libs/MarketplaceLib.sol";

contract AOTMPrivateListings is AdminControl, IIdentityVerifier, IIdentityVerifierCheck {

    /**
     * @dev Mapping of marketplace address -> listing -> buyer
     */
    mapping(address => mapping(uint40 => address[])) public _buyers;

    /**
     * @dev Mapping of marketplace -> listing -> amount
     *
     * Helpful for case of ERC-1155 edition listings.
     *
     */
    mapping(address => mapping(uint40 => uint)) public _buyerAmounts;

    /**
     * @dev Mapping of marketplace -> listing -> buyer -> amount
     *
     * Helpful for case of ERC-1155 edition listings.
     *
     */
    mapping(address => mapping(uint40 => mapping(address => uint))) public _boughtAmounts;

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

    /**
     * @dev Configure buyer for given listing on given marketplace
     *
     * @param marketplace   which marketplace the listing is on
     * @param listingId     which listingId this is for
     * @param buyers        who is allowed to interact with this listing
     */
    function configure(address marketplace, uint40 listingId, address[] memory buyers, uint amount) external {
      IMarketplaceCore mktplace = IMarketplaceCore(marketplace);
      IMarketplaceCore.Listing memory listing = mktplace.getListing(listingId);
      require(listing.seller == msg.sender, "Only lister can configure listing.");
      _buyers[marketplace][listingId] = buyers;
      _buyerAmounts[marketplace][listingId] = amount;
    }

    /**
     * @dev see {IIdentityVerifier-verify}.
     */
    function verify(uint40 listingId, address identity, address, uint256, uint24, uint256, address, bytes calldata) external override returns (bool) {
      // Case of bidding
      bool canBid = false;
      for (uint i; i < _buyers[msg.sender][listingId].length; i++) {
        if (_buyers[msg.sender][listingId][i] == identity) {
          canBid = true;
        }
      }

      // Case of buying
      IMarketplaceCore mktplace = IMarketplaceCore(msg.sender);
      IMarketplaceCore.Listing memory listing = mktplace.getListing(listingId);
      if (listing.details.type_ == MarketplaceLib.ListingType.FIXED_PRICE) {
        uint boughtAmount = _boughtAmounts[msg.sender][listingId][identity];
        require(boughtAmount < _buyerAmounts[msg.sender][listingId], "Already bought this listing.");
        _boughtAmounts[msg.sender][listingId][identity]++;
      }
      return canBid;
    }

    /**
     * @dev see {IIdentityVerifierCheck-checkVerify}.
     */
    function checkVerify(address marketplaceAddress, uint40 listingId, address identity, address, uint256, uint24, uint256, address, bytes calldata) external override view returns (bool) {
      bool canBid = false;
      for (uint i; i < _buyers[marketplaceAddress][listingId].length; i++) {
        if (_buyers[marketplaceAddress][listingId][i] == identity) {
          canBid = true;
        }
      }
      return canBid;
    }
}
// File: contracts/libs/MarketplaceLib.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Checker.sol";
import "@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol";

import "@manifoldxyz/libraries-solidity/contracts/access/IAdminControl.sol";

import "../IIdentityVerifier.sol";
import "../ILazyDelivery.sol";
import "../IPriceEngine.sol";

import "./BidTreeLib.sol";
import "./TokenLib.sol";

/**
 * Interface for Ownable contracts
 */
interface IOwnable {
    function owner() external view returns(address);
}

/**
 * @dev Marketplace libraries
 */
library MarketplaceLib {
    using AddressUpgradeable for address;
    using BidTreeLib for BidTreeLib.BidTree;

    // Events
    event CreateListing(uint40 indexed listingId, uint16 marketplaceBPS, uint16 referrerBPS, uint8 listingType, uint24 totalAvailable, uint24 totalPerSale, uint48 startTime, uint48 endTime, uint256 initialAmount, uint16 extensionInterval, uint16 minIncrementBPS, address erc20, address identityVerifier);
    event CreateListingTokenDetails(uint40 indexed listingId, uint256 id, address address_, uint8 spec, bool lazy);
    event CreateListingFees(uint40 indexed listingId, uint16 deliverBPS, uint240 deliverFixed);

    event PurchaseEvent(uint40 indexed listingId, address referrer, address buyer, uint24 count, uint256 amount);
    event BidEvent(uint40 indexed listingId, address referrer, address bidder, uint256 amount);
    event ModifyListing(uint40 indexed listingId, uint256 initialAmount, uint48 startTime, uint48 endTime);
    event CancelListing(uint40 indexed listingId, address requestor, uint16 holdbackBPS);

    // Listing types
    enum ListingType {
        INVALID,
        INDIVIDUAL_AUCTION,
        FIXED_PRICE,
        DYNAMIC_PRICE,
        RANKED_AUCTION
    }

    /**
     * @dev Listing structure
     *
     * @param seller          - the selling party
     * @param flags           - bit flag (hasBid, finalized, tokenCreator).  See FLAG_MASK_*
     * @param totalSold       - total number of items sold.  This IS NOT the number of sales.  Number of sales is totalSold/details.totalPerSale.
     * @param marketplaceBPS  - Marketplace fee BPS
     * @param referrerBPS     - Fee BPS for referrer if there is one
     * @param details         - ListingDetails.  Contains listing configuration
     * @param token           - TokenDetails.  Contains the details of token being sold
     * @param receivers       - Array of ListingReceiver structs.  If provided, will distribute sales proceeds to receivers accordingly.
     * @param bid             - Active bid.  Only valid for INDIVIDUAL_AUCTION (1 bid)
     * @param fees            - DeliveryFees.  Contains the delivery fee configuration for the listing
     */
    struct Listing {
        address payable seller;
        uint8 flags;
        uint24 totalSold;
        uint16 marketplaceBPS;
        uint16 referrerBPS;
        ListingDetails details;
        TokenDetails token;
        ListingReceiver[] receivers;
        Bid bid;
        DeliveryFees fees;
    }

    uint8 internal constant FLAG_MASK_HAS_BID = 0x1;
    uint8 internal constant FLAG_MASK_FINALIZED = 0x2;
    uint8 internal constant FLAG_MASK_TOKEN_CREATOR = 0x4;

    /**
     * @dev Listing details structure
     *
     * @param initialAmount     - The initial amount of the listing. For auctions, it represents the reserve price.  For DYNAMIC_PRICE listings, it must be 0.
     * @param type_             - Listing type
     * @param totalAvailable    - Total number of tokens available.  Must be divisible by totalPerSale. For INDIVIDUAL_AUCTION, totalAvailable must equal totalPerSale
     * @param totalPerSale      - Number of tokens the buyer will get per purchase.  Must be 1 if it is a lazy token
     * @param extensionInterval - Only valid for *_AUCTION types. Indicates how long an auction will extend if a bid is made within the last <extensionInterval> seconds of the auction.
     * @param minIncrementBPS   - Only valid for *_AUCTION types. Indicates the minimum bid increase required
     * @param erc20             - If not 0x0, it indicates the erc20 token accepted for this sale
     * @param identityVerifier  - If not 0x0, it indicates the buyers should be verified before any bid or purchase
     * @param startTime         - The start time of the sale.  If set to 0, startTime will be set to the first bid/purchase.
     * @param endTime           - The end time of the sale.  If startTime is 0, represents the duration of the listing upon first bid/purchase.
     */
    struct ListingDetails {
        uint256 initialAmount;
        ListingType type_;
        uint24 totalAvailable;
        uint24 totalPerSale;
        uint16 extensionInterval;
        uint16 minIncrementBPS;
        address erc20;
        address identityVerifier;
        uint48 startTime;
        uint48 endTime;
    }

    /**
     * @dev Token detail structure
     *
     * @param address_  - The contract address of the token
     * @param id        - The token id (or for a lazy asset, the asset id)
     * @param spec      - The spec of the token.  If it's a lazy token, it must be blank.
     * @param lazy      - True if token is to be lazy minted, false otherwise.  If lazy, the contract address must support ILazyDelivery
     */
    struct TokenDetails {
        uint256 id;
        address address_;
        TokenLib.Spec spec;
        bool lazy;
    }

    /**
     * @dev Fee configuration for listing
     *
     * @param deliverBPS         - Additional fee needed to deliver the token (BPS)
     * @param deliverFixed       - Additional fee needed to deliver the token (fixed)
     */
    struct DeliveryFees {
        uint16 deliverBPS;
        uint240 deliverFixed;
    }

    /**
     * Listing receiver.  The array of listing receivers must add up to 10000 BPS if provided.
     */
    struct ListingReceiver {
        address payable receiver;
        uint16 receiverBPS;
    }

    /**
     * Represents an active bid
     *
     * @param referrer     - The referrer
     * @param bidder       - The bidder
     * @param delivered    - Whether or not the token has been delivered.
     * @param settled      - Whether or not the seller has been paid
     * @param refunded     - Whether or not the bid has been refunded
     */
    struct Bid {
        uint256 amount;
        address payable bidder;
        bool delivered;
        bool settled;
        bool refunded;
        uint48 timestamp;
        address payable referrer;
    }

    /**
     * Construct a marketplace listing
     */
    function constructListing(address seller, uint40 listingId, Listing storage listing, ListingDetails calldata listingDetails, TokenDetails calldata tokenDetails, DeliveryFees calldata deliveryFees, ListingReceiver[] calldata listingReceivers, bool intake) public {
        require(tokenDetails.address_.isContract(), "Token address must be a contract");
        require(listingDetails.endTime > listingDetails.startTime, "End time must be after start time");
        require(listingDetails.startTime == 0 || listingDetails.startTime > block.timestamp, "Start and end time cannot occur in the past");
        require(listingDetails.totalAvailable % listingDetails.totalPerSale == 0, "Invalid token config");
        
        if (listingDetails.identityVerifier != address(0)) {
            require(ERC165Checker.supportsInterface(listingDetails.identityVerifier, type(IIdentityVerifier).interfaceId), "Misconfigured verifier");
        }
        
        if (listingReceivers.length > 0) {
            uint256 totalBPS;
            for (uint i = 0; i < listingReceivers.length; i++) {
                listing.receivers.push(listingReceivers[i]);
                totalBPS += listingReceivers[i].receiverBPS;
            }
            require(totalBPS == 10000, "Invalid receiver config");
        }

        if (listingDetails.type_ == ListingType.INDIVIDUAL_AUCTION) {
            require(listingDetails.totalAvailable == listingDetails.totalPerSale, "Invalid token config");
        } else if (listingDetails.type_ == ListingType.DYNAMIC_PRICE) {
            require(tokenDetails.lazy && listingDetails.initialAmount == 0, "Invalid listing config");
            require(ERC165Checker.supportsInterface(tokenDetails.address_, type(IPriceEngine).interfaceId), "Lazy delivered dynamic price items requires token address to implement IPriceEngine");
        } else if (listingDetails.type_ == ListingType.RANKED_AUCTION) {
            require(tokenDetails.lazy && listingDetails.totalAvailable <= 256, "Invalid listing config");
        }

        // Purchase types        
        if (listingDetails.type_ == ListingType.FIXED_PRICE || listingDetails.type_ == ListingType.DYNAMIC_PRICE) {
            require(deliveryFees.deliverBPS == 0 && deliveryFees.deliverFixed == 0 && listingDetails.extensionInterval == 0 && listingDetails.minIncrementBPS == 0, "Invalid listing config");
        }

        if (tokenDetails.lazy) {
            require(listingDetails.totalPerSale == 1, "Invalid token config");
            require(ERC165Checker.supportsInterface(tokenDetails.address_, type(ILazyDelivery).interfaceId), "Lazy delivery requires token address to implement ILazyDelivery");
        } else {
            require(listingDetails.type_ == ListingType.INDIVIDUAL_AUCTION || listingDetails.type_ == ListingType.FIXED_PRICE, "Invalid type");
            if (intake) {
                _intakeToken(tokenDetails.spec, tokenDetails.address_, tokenDetails.id, listingDetails.totalAvailable, seller);
            }
        }

        // Set Listing Data
        listing.seller = payable(seller);
        listing.details = listingDetails;
        listing.token = tokenDetails;
        listing.fees = deliveryFees;

        // Token ownership check
        if (ERC165Checker.supportsInterface(tokenDetails.address_, type(IAdminControl).interfaceId)
                && IAdminControl(tokenDetails.address_).isAdmin(seller)) {
            listing.flags |= FLAG_MASK_TOKEN_CREATOR;
        } else {
            try IOwnable(tokenDetails.address_).owner() returns (address owner) {
                if (owner == seller) listing.flags |= FLAG_MASK_TOKEN_CREATOR;
            } catch {}
        }
        
        
        _emitCreateListing(listingId, listing);

    }

    function _emitCreateListing(uint40 listingId, Listing storage listing) private {
        emit CreateListing(listingId, listing.marketplaceBPS, listing.referrerBPS, uint8(listing.details.type_), listing.details.totalAvailable, listing.details.totalPerSale, listing.details.startTime, listing.details.endTime, listing.details.initialAmount, listing.details.extensionInterval, listing.details.minIncrementBPS, listing.details.erc20, listing.details.identityVerifier);
        emit CreateListingTokenDetails(listingId, listing.token.id, listing.token.address_, uint8(listing.token.spec), listing.token.lazy);
        if (listing.fees.deliverBPS > 0 || listing.fees.deliverFixed > 0) {
            emit CreateListingFees(listingId, listing.fees.deliverBPS, listing.fees.deliverFixed);
        }
    }

    function _intakeToken(TokenLib.Spec tokenSpec, address tokenAddress, uint256 tokenId, uint256 tokensToTransfer, address from) private {
        if (tokenSpec == TokenLib.Spec.ERC721) {
            require(tokensToTransfer == 1, "ERC721 invalid number of tokens to transfer");
            TokenLib._erc721Transfer(tokenAddress, tokenId, from, address(this));
        } else if (tokenSpec == TokenLib.Spec.ERC1155) {
            TokenLib._erc1155Transfer(tokenAddress, tokenId, tokensToTransfer, from, address(this));
        } else {
            revert("Unsupported token spec");
        }
    }

    function modifyListing(uint40 listingId, Listing storage listing, uint256 initialAmount, uint48 startTime, uint48 endTime) public {
        require(listing.seller == msg.sender, "Permission denied");
        require(endTime > startTime, "End time must be after start time");
        require(startTime == 0 || startTime > block.timestamp, "Start and end time cannot occur in the past");
        require(listing.details.startTime == 0 || (block.timestamp < listing.details.startTime && (listing.flags & MarketplaceLib.FLAG_MASK_FINALIZED) == 0), "Cannot modify listing that has already started or completed");
        require(listing.details.type_ != MarketplaceLib.ListingType.DYNAMIC_PRICE || initialAmount == 0, "Invalid listing config");
        listing.details.initialAmount = initialAmount;
        listing.details.startTime = startTime;
        listing.details.endTime = endTime;

        emit ModifyListing(listingId, initialAmount, startTime, endTime);
    }

    function getBids(uint40 listingId, Listing storage listing,  mapping(uint40 => BidTreeLib.BidTree) storage listingBidTree, mapping (uint40 => address[]) storage listingBidTreeFinalOrder) public view returns(Bid[] memory bids) {
        if ((listing.flags & MarketplaceLib.FLAG_MASK_HAS_BID) != 0) {
            if (listing.details.type_ == MarketplaceLib.ListingType.RANKED_AUCTION) {
                BidTreeLib.BidTree storage bidTree = listingBidTree[listingId];
                if ((listing.flags & MarketplaceLib.FLAG_MASK_FINALIZED) == 0) {
                    bids = new MarketplaceLib.Bid[](bidTree.size);
                    uint256 index = 0;
                    address key = bidTree.first();
                    while (key != address(0)) {
                        BidTreeLib.Bid memory bid_ = bidTree.getBid(key);
                        bids[index] = MarketplaceLib.Bid({amount:bid_.amount, bidder:payable(key), delivered:bid_.delivered, settled:bid_.settled, refunded:bid_.refunded, timestamp:bid_.timestamp, referrer:payable(address(0))});
                        key = bidTree.next(key);
                        index++;
                    }
                } else {
                    address[] storage bidTreeFinalOrder = listingBidTreeFinalOrder[listingId];
                    bids = new MarketplaceLib.Bid[](bidTreeFinalOrder.length);
                    for (uint i = 0; i < bidTreeFinalOrder.length; i++) {
                        address key = bidTreeFinalOrder[i];
                        BidTreeLib.Bid memory bid_ = bidTree.getBid(key);
                        bids[i] = MarketplaceLib.Bid({amount:bid_.amount, bidder:payable(key), delivered:bid_.delivered, settled:bid_.settled, refunded:bid_.refunded, timestamp:bid_.timestamp, referrer:payable(address(0))});
                    }
                }
            } else {
                bids = new MarketplaceLib.Bid[](1);
                bids[0] = listing.bid;
            }
        }
    }

}
// File: contracts/IMarketplaceCore.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "./libs/MarketplaceLib.sol";

/**
 * Core Marketplace interface
 */     
interface IMarketplaceCore {

    event MarketplaceEnabled(address requestor, bool value);
    event MarketplaceFees(address requestor, uint16 feeBPS, uint16 referrerBPS);
    event MarketplaceSellerRegistry(address requestor, address registry);
    event MarketplaceWithdraw(address requestor, address erc20, uint256 amount, address receiver);
    event MarketplaceWithdrawEscrow(address requestor, address erc20, uint256 amount);
    event MarketplaceRoyaltyEngineUpdate(address royaltyEngineV1);

    /**
     * @dev Listing structure
     *
     * @param id              - id of listing
     * @param seller          - the selling party
     * @param finalized       - Whether or not this listing has completed accepting bids/purchases
     * @param totalSold       - total number of items sold.  This IS NOT the number of sales.  Number of sales is totalSold/details.totalPerSale.
     * @param marketplaceBPS  - Marketplace fee BPS
     * @param referrerBPS     - Referrer BPS
     * @param details         - ListingDetails.  Contains listing configuration
     * @param token           - TokenDetails.  Contains the details of token being sold
     * @param receivers       - Array of ListingReceiver structs.  If provided, will distribute sales proceeds to receivers accordingly.
     * @param fees            - DeliveryFees.  Contains the delivery fee configuration for the listing
     * @param bid             - Active bid.  Only valid for INDIVIDUAL_AUCTION (1 bid)
     */
    struct Listing {
        uint256 id;
        address payable seller;
        bool finalized;
        uint24 totalSold;
        uint16 marketplaceBPS;
        uint16 referrerBPS;
        MarketplaceLib.ListingDetails details;
        MarketplaceLib.TokenDetails token;
        MarketplaceLib.ListingReceiver[] receivers;
        MarketplaceLib.DeliveryFees fees;
        MarketplaceLib.Bid bid;
    }

    /**
     * @dev Set marketplace fee
     */
    function setFees(uint16 marketplaceFeeBPS, uint16 marketplaceReferrerBPS) external;

    /**
     * @dev Set marketplace enabled
     */
    function setEnabled(bool enabled) external;

    /**
     * @dev Set marketplace seller registry
     */
    function setSellerRegistry(address registry) external;

    /**
     * @dev See RoyaltyEngineV1 location. Can only be set once
     */
    function setRoyaltyEngineV1(address royaltyEngineV1) external;

    /**
     * @dev Withdraw from treasury
     */
    function withdraw(uint256 amount, address payable receiver) external;

    /**
     * @dev Withdraw from treasury
     */
    function withdraw(address erc20, uint256 amount, address payable receiver) external;

    /**
     * @dev Withdraw from escrow
     */
    function withdrawEscrow(uint256 amount) external;

    /**
     * @dev Withdraw from escrow
     */
    function withdrawEscrow(address erc20, uint256 amount) external;

    /**
     * @dev Create listing
     */
    function createListing(MarketplaceLib.ListingDetails calldata listingDetails, MarketplaceLib.TokenDetails calldata tokenDetails, MarketplaceLib.DeliveryFees calldata deliveryFees, MarketplaceLib.ListingReceiver[] calldata listingReceivers, bool enableReferrer, bytes calldata data) external returns (uint40);

    /**
     * @dev Modify listing
     */
    function modifyListing(uint40 listingId, uint256 initialAmount, uint48 startTime, uint48 endTime) external;

    /**
     * @dev Purchase a listed item
     */
    function purchase(uint40 listingId) external payable;
    function purchase(uint40 listingId, bytes calldata data) external payable;

    /**
     * @dev Purchase a listed item (with a referrer)
     */
    function purchase(address referrer, uint40 listingId) external payable;
    function purchase(address referrer, uint40 listingId, bytes calldata data) external payable;

    /**
     * @dev Purchase a listed item
     */
    function purchase(uint40 listingId, uint24 count) external payable;
    function purchase(uint40 listingId, uint24 count, bytes calldata data) external payable;

    /**
     * @dev Purchase a listed item (with a referrer)
     */
    function purchase(address referrer, uint40 listingId, uint24 count) external payable;
    function purchase(address referrer, uint40 listingId, uint24 count, bytes calldata data) external payable;

    /**
     * @dev Bid on a listed item
     */
    function bid(uint40 listingId, bool increase) external payable;
    function bid(uint40 listingId, bool increase, bytes calldata data) external payable;

    /**
     * @dev Bid on a listed item (with a referrer)
     */
    function bid(address payable referrer, uint40 listingId, bool increase) external payable;
    function bid(address payable referrer, uint40 listingId, bool increase, bytes calldata data) external payable;

    /**
     * @dev Bid on a listed item
     */
    function bid(uint40 listingId, uint256 bidAmount, bool increase) external;
    function bid(uint40 listingId, uint256 bidAmount, bool increase, bytes calldata data) external;

    /**
     * @dev Bid on a listed item (with a referrer)
     */
    function bid(address payable referrer, uint40 listingId, uint256 bidAmount, bool increase) external;
    function bid(address payable referrer, uint40 listingId, uint256 bidAmount, bool increase, bytes calldata data) external;

    /**
     * @dev Collect proceeds of sale.  Only valid for non-lazy auctions where the asset
     * is in escrow
     */
    function collect(uint40 listingId) external;

    /**
     * @dev Finalize a listed item (post-purchase)
     */
    function finalize(uint40 listingId) external payable;
    
    /**
     * @dev Cancel listing
     */
    function cancel(uint40 listingId, uint16 holdbackBPS) external;
    
    /**
     * @dev Deliver a finalized bid purchase
     */
    function deliver(uint40 listingId, uint256 bidIndex) external payable;

    /**
     * @dev Get listing details
     */
    function getListing(uint40 listingId) external view returns(Listing memory);

    /**
     * @dev Get the listing's current price
     */
    function getListingCurrentPrice(uint40 listingId) external view returns(uint256);

    /**
     * @dev Get the listing's deliver fee
     */
    function getListingDeliverFee(uint40 listingId, uint256 price) external view returns(uint256);

    /**
     * @dev Get the total listing price for multiple items
     */
    function getListingTotalPrice(uint40 listingId, uint24 count) external view returns(uint256);

    /**
     * @dev Returns bids of a listing. No ordering guarantees
     */
    function getBids(uint40 listingId) external view returns(MarketplaceLib.Bid[] memory);
}
// File: contracts/IIdentityVerifierCheck.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

/**
 * Implement this interface if you want to have a view function to check
 * whether or not an identity is verified to bid/purchase
 */
interface IIdentityVerifierCheck is IERC165 {

    /**
     *  @dev Check that a buyer is verified to purchase/bid
     *
     *  @param marketplaceAddress   The address of the marketplace
     *  @param listingId            The listingId associated with this verification
     *  @param identity             The identity to verify
     *  @param tokenAddress         The tokenAddress associated with this verification
     *  @param tokenId              The tokenId associated with this verification
     *  @param requestCount         The number of items being requested to purchase/bid
     *  @param requestAmount        The amount being requested
     *  @param requestERC20         The erc20 token address of the amount (0x0 if ETH)
     *  @param data                 Additional data needed to verify
     *
     */
    function checkVerify(address marketplaceAddress, uint40 listingId, address identity, address tokenAddress, uint256 tokenId, uint24 requestCount, uint256 requestAmount, address requestERC20, bytes calldata data) external view returns (bool);

}
// File: contracts/IIdentityVerifier.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

interface IIdentityVerifier is IERC165 {

    /**
     *  @dev Verify that the buyer can purchase/bid
     *
     *  @param listingId      The listingId associated with this verification
     *  @param identity       The identity to verify
     *  @param tokenAddress   The tokenAddress associated with this verification
     *  @param tokenId        The tokenId associated with this verification
     *  @param requestCount   The number of items being requested to purchase/bid
     *  @param requestAmount  The amount being requested
     *  @param requestERC20   The erc20 token address of the amount (0x0 if ETH)
     *  @param data           Additional data needed to verify
     *
     */
    function verify(uint40 listingId, address identity, address tokenAddress, uint256 tokenId, uint24 requestCount, uint256 requestAmount, address requestERC20, bytes calldata data) external returns (bool);

}
// File: @manifoldxyz/libraries-solidity/contracts/access/AdminControl.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./IAdminControl.sol";

abstract contract AdminControl is Ownable, IAdminControl, ERC165 {
    using EnumerableSet for EnumerableSet.AddressSet;

    // Track registered admins
    EnumerableSet.AddressSet private _admins;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return interfaceId == type(IAdminControl).interfaceId
            || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Only allows approved admins to call the specified function
     */
    modifier adminRequired() {
        require(owner() == msg.sender || _admins.contains(msg.sender), "AdminControl: Must be owner or admin");
        _;
    }   

    /**
     * @dev See {IAdminControl-getAdmins}.
     */
    function getAdmins() external view override returns (address[] memory admins) {
        admins = new address[](_admins.length());
        for (uint i = 0; i < _admins.length(); i++) {
            admins[i] = _admins.at(i);
        }
        return admins;
    }

    /**
     * @dev See {IAdminControl-approveAdmin}.
     */
    function approveAdmin(address admin) external override onlyOwner {
        if (!_admins.contains(admin)) {
            emit AdminApproved(admin, msg.sender);
            _admins.add(admin);
        }
    }

    /**
     * @dev See {IAdminControl-revokeAdmin}.
     */
    function revokeAdmin(address admin) external override onlyOwner {
        if (_admins.contains(admin)) {
            emit AdminRevoked(admin, msg.sender);
            _admins.remove(admin);
        }
    }

    /**
     * @dev See {IAdminControl-isAdmin}.
     */
    function isAdmin(address admin) public override view returns (bool) {
        return (owner() == admin || _admins.contains(admin));
    }

}
// File: contracts/libs/TokenLib.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";

/**
 * @dev Token specs and functions
 */
library TokenLib {
    // Spec types
    enum Spec {
        NONE,
        ERC721,
        ERC1155
    }

    function _getSpecString(Spec spec) internal pure returns (string memory) {
        if (spec == Spec.ERC721) {
           return "erc721";
        } else if (spec == Spec.ERC1155) {
            return "erc1155";
        } else {
            return "";
        }
    }

    function _erc721Transfer(address tokenAddress, uint256 tokenId, address from, address to) internal {
        // Transfer token
        IERC721(tokenAddress).transferFrom(from, to, tokenId);
    }

    function _erc1155Transfer(address tokenAddress, uint256 tokenId, uint256 value, address from, address to) internal {
        // Transfer token
        IERC1155(tokenAddress).safeTransferFrom(from, to, tokenId, value, "");
    }

}
// File: contracts/libs/BidTreeLib.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * Bid tree library (sorts from highest amount to lowest amount, then by oldest to newest if they're the same value)
 */
library BidTreeLib {
    /**
      * Represents an active bid
      *
      * @param delivered    - Whether or not the token has been delivered.
      * @param settled      - Whether or not the seller has been paid
      * @param refunded     - Whether or not the bid has been refunded
      */
     struct Bid {
         uint256 amount;
         bool delivered;
         bool settled;
         bool refunded;
         uint48 timestamp;
    }

    struct Node {
        Bid data;
        address parent;
        address left;
        address right;
        bool red;
    }

    struct BidTree {
        address root;
        uint16 size;
        mapping(address => Node) nodes;
    }

    address private constant EMPTY = address(0);

    function first(BidTree storage self) internal view returns (address _key) {
        _key = self.root;
        if (_key != EMPTY) {
            while (self.nodes[_key].left != EMPTY) {
                _key = self.nodes[_key].left;
            }
        }
    }
    function last(BidTree storage self) internal view returns (address _key) {
        _key = self.root;
        if (_key != EMPTY) {
            while (self.nodes[_key].right != EMPTY) {
                _key = self.nodes[_key].right;
            }
        }
    }
    function next(BidTree storage self, address target) internal view returns (address cursor) {
        require(target != EMPTY);
        if (self.nodes[target].right != EMPTY) {
            cursor = bidTreeMinimum(self, self.nodes[target].right);
        } else {
            cursor = self.nodes[target].parent;
            while (cursor != EMPTY && target == self.nodes[cursor].right) {
                target = cursor;
                cursor = self.nodes[cursor].parent;
            }
        }
    }
    function prev(BidTree storage self, address target) internal view returns (address cursor) {
        require(target != EMPTY);
        if (self.nodes[target].left != EMPTY) {
            cursor = bidTreeMaximum(self, self.nodes[target].left);
        } else {
            cursor = self.nodes[target].parent;
            while (cursor != EMPTY && target == self.nodes[cursor].left) {
                target = cursor;
                cursor = self.nodes[cursor].parent;
            }
        }
    }
    function exists(BidTree storage self, address key) internal view returns (bool) {
        return (key != EMPTY) && ((key == self.root) || (self.nodes[key].parent != EMPTY));
    }
    function isEmpty(address key) internal pure returns (bool) {
        return key == EMPTY;
    }
    function getEmpty() internal pure returns (address) {
        return EMPTY;
    }
    function getBid(BidTree storage self, address key) internal view returns (Bid storage) {
        require(exists(self, key));
        return(self.nodes[key].data);
    }

    function insert(BidTree storage self, address key, uint256 amount, uint48 timestamp) internal {
        require(key != EMPTY);
        require(!exists(self, key));
        address cursor = EMPTY;
        address probe = self.root;
        Bid storage cursorData;
        while (probe != EMPTY) {
            cursor = probe;
            cursorData = self.nodes[cursor].data;
            if (amount > cursorData.amount || (amount == cursorData.amount && timestamp < cursorData.timestamp)) {
                probe = self.nodes[probe].left;
            } else {
                probe = self.nodes[probe].right;
            }
        }
        self.nodes[key] = Node({data: Bid({amount: amount, delivered: false, settled: false, refunded: false, timestamp: timestamp}), parent: cursor, left: EMPTY, right: EMPTY, red: true});
        if (cursor == EMPTY) {
            self.root = key;
        } else {
          cursorData = self.nodes[cursor].data;
          if (amount > cursorData.amount || (amount == cursorData.amount && timestamp < cursorData.timestamp)) {
            self.nodes[cursor].left = key;
          } else {
            self.nodes[cursor].right = key;
          }
        }
        insertFixup(self, key);
        self.size += 1;
    }
    function remove(BidTree storage self, address key) internal {
        require(key != EMPTY);
        require(exists(self, key));
        address probe;
        address cursor;
        if (self.nodes[key].left == EMPTY || self.nodes[key].right == EMPTY) {
            cursor = key;
        } else {
            cursor = self.nodes[key].right;
            while (self.nodes[cursor].left != EMPTY) {
                cursor = self.nodes[cursor].left;
            }
        }
        if (self.nodes[cursor].left != EMPTY) {
            probe = self.nodes[cursor].left;
        } else {
            probe = self.nodes[cursor].right;
        }
        address yParent = self.nodes[cursor].parent;
        self.nodes[probe].parent = yParent;
        if (yParent != EMPTY) {
            if (cursor == self.nodes[yParent].left) {
                self.nodes[yParent].left = probe;
            } else {
                self.nodes[yParent].right = probe;
            }
        } else {
            self.root = probe;
        }
        bool doFixup = !self.nodes[cursor].red;
        if (cursor != key) {
            replaceParent(self, cursor, key);
            self.nodes[cursor].left = self.nodes[key].left;
            self.nodes[self.nodes[cursor].left].parent = cursor;
            self.nodes[cursor].right = self.nodes[key].right;
            self.nodes[self.nodes[cursor].right].parent = cursor;
            self.nodes[cursor].red = self.nodes[key].red;
            (cursor, key) = (key, cursor);
        }
        if (doFixup) {
            removeFixup(self, probe);
        }
        delete self.nodes[cursor];
        self.size -= 1;
    }

    function bidTreeMinimum(BidTree storage self, address key) private view returns (address) {
        while (self.nodes[key].left != EMPTY) {
            key = self.nodes[key].left;
        }
        return key;
    }
    function bidTreeMaximum(BidTree storage self, address key) private view returns (address) {
        while (self.nodes[key].right != EMPTY) {
            key = self.nodes[key].right;
        }
        return key;
    }

    function rotateLeft(BidTree storage self, address key) private {
        address cursor = self.nodes[key].right;
        address keyParent = self.nodes[key].parent;
        address cursorLeft = self.nodes[cursor].left;
        self.nodes[key].right = cursorLeft;
        if (cursorLeft != EMPTY) {
            self.nodes[cursorLeft].parent = key;
        }
        self.nodes[cursor].parent = keyParent;
        if (keyParent == EMPTY) {
            self.root = cursor;
        } else if (key == self.nodes[keyParent].left) {
            self.nodes[keyParent].left = cursor;
        } else {
            self.nodes[keyParent].right = cursor;
        }
        self.nodes[cursor].left = key;
        self.nodes[key].parent = cursor;
    }
    function rotateRight(BidTree storage self, address key) private {
        address cursor = self.nodes[key].left;
        address keyParent = self.nodes[key].parent;
        address cursorRight = self.nodes[cursor].right;
        self.nodes[key].left = cursorRight;
        if (cursorRight != EMPTY) {
            self.nodes[cursorRight].parent = key;
        }
        self.nodes[cursor].parent = keyParent;
        if (keyParent == EMPTY) {
            self.root = cursor;
        } else if (key == self.nodes[keyParent].right) {
            self.nodes[keyParent].right = cursor;
        } else {
            self.nodes[keyParent].left = cursor;
        }
        self.nodes[cursor].right = key;
        self.nodes[key].parent = cursor;
    }

    function insertFixup(BidTree storage self, address key) private {
        address cursor;
        while (key != self.root && self.nodes[self.nodes[key].parent].red) {
            address keyParent = self.nodes[key].parent;
            if (keyParent == self.nodes[self.nodes[keyParent].parent].left) {
                cursor = self.nodes[self.nodes[keyParent].parent].right;
                if (self.nodes[cursor].red) {
                    self.nodes[keyParent].red = false;
                    self.nodes[cursor].red = false;
                    self.nodes[self.nodes[keyParent].parent].red = true;
                    key = self.nodes[keyParent].parent;
                } else {
                    if (key == self.nodes[keyParent].right) {
                      key = keyParent;
                      rotateLeft(self, key);
                    }
                    keyParent = self.nodes[key].parent;
                    self.nodes[keyParent].red = false;
                    self.nodes[self.nodes[keyParent].parent].red = true;
                    rotateRight(self, self.nodes[keyParent].parent);
                }
            } else {
                cursor = self.nodes[self.nodes[keyParent].parent].left;
                if (self.nodes[cursor].red) {
                    self.nodes[keyParent].red = false;
                    self.nodes[cursor].red = false;
                    self.nodes[self.nodes[keyParent].parent].red = true;
                    key = self.nodes[keyParent].parent;
                } else {
                    if (key == self.nodes[keyParent].left) {
                      key = keyParent;
                      rotateRight(self, key);
                    }
                    keyParent = self.nodes[key].parent;
                    self.nodes[keyParent].red = false;
                    self.nodes[self.nodes[keyParent].parent].red = true;
                    rotateLeft(self, self.nodes[keyParent].parent);
                }
            }
        }
        self.nodes[self.root].red = false;
    }

    function replaceParent(BidTree storage self, address a, address b) private {
        address bParent = self.nodes[b].parent;
        self.nodes[a].parent = bParent;
        if (bParent == EMPTY) {
            self.root = a;
        } else {
            if (b == self.nodes[bParent].left) {
                self.nodes[bParent].left = a;
            } else {
                self.nodes[bParent].right = a;
            }
        }
    }
    function removeFixup(BidTree storage self, address key) private {
        address cursor;
        while (key != self.root && !self.nodes[key].red) {
            address keyParent = self.nodes[key].parent;
            if (key == self.nodes[keyParent].left) {
                cursor = self.nodes[keyParent].right;
                if (self.nodes[cursor].red) {
                    self.nodes[cursor].red = false;
                    self.nodes[keyParent].red = true;
                    rotateLeft(self, keyParent);
                    cursor = self.nodes[keyParent].right;
                }
                if (!self.nodes[self.nodes[cursor].left].red && !self.nodes[self.nodes[cursor].right].red) {
                    self.nodes[cursor].red = true;
                    key = keyParent;
                } else {
                    if (!self.nodes[self.nodes[cursor].right].red) {
                        self.nodes[self.nodes[cursor].left].red = false;
                        self.nodes[cursor].red = true;
                        rotateRight(self, cursor);
                        cursor = self.nodes[keyParent].right;
                    }
                    self.nodes[cursor].red = self.nodes[keyParent].red;
                    self.nodes[keyParent].red = false;
                    self.nodes[self.nodes[cursor].right].red = false;
                    rotateLeft(self, keyParent);
                    key = self.root;
                }
            } else {
                cursor = self.nodes[keyParent].left;
                if (self.nodes[cursor].red) {
                    self.nodes[cursor].red = false;
                    self.nodes[keyParent].red = true;
                    rotateRight(self, keyParent);
                    cursor = self.nodes[keyParent].left;
                }
                if (!self.nodes[self.nodes[cursor].right].red && !self.nodes[self.nodes[cursor].left].red) {
                    self.nodes[cursor].red = true;
                    key = keyParent;
                } else {
                    if (!self.nodes[self.nodes[cursor].left].red) {
                        self.nodes[self.nodes[cursor].right].red = false;
                        self.nodes[cursor].red = true;
                        rotateLeft(self, cursor);
                        cursor = self.nodes[keyParent].left;
                    }
                    self.nodes[cursor].red = self.nodes[keyParent].red;
                    self.nodes[keyParent].red = false;
                    self.nodes[self.nodes[cursor].left].red = false;
                    rotateRight(self, keyParent);
                    key = self.root;
                }
            }
        }
        self.nodes[key].red = false;
    }
}
// ----------------------------------------------------------------------------
// End - BokkyPooBah's Red-Black BidTree Library
// ----------------------------------------------------------------------------
// File: contracts/IPriceEngine.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

interface IPriceEngine is IERC165 {

    /**
     *  @dev Determine price of an asset given the number
     *  already minted.
     */
    function price(uint256 assetId, uint256 alreadyMinted, uint24 count) view external returns (uint256);

}
// File: contracts/ILazyDelivery.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

interface ILazyDelivery is IERC165 {
    function deliver(address caller, uint256 listingId, uint256 assetId, address to, uint256 payableAmount, uint256 index) external returns(uint256);
}
// File: @manifoldxyz/libraries-solidity/contracts/access/IAdminControl.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

/**
 * @dev Interface for admin control
 */
interface IAdminControl is IERC165 {

    event AdminApproved(address indexed account, address indexed sender);
    event AdminRevoked(address indexed account, address indexed sender);

    /**
     * @dev gets address of all admins
     */
    function getAdmins() external view returns (address[] memory);

    /**
     * @dev add an admin.  Can only be called by contract owner.
     */
    function approveAdmin(address admin) external;

    /**
     * @dev remove an admin.  Can only be called by contract owner.
     */
    function revokeAdmin(address admin) external;

    /**
     * @dev checks whether or not given address is an admin
     * Returns True if they are
     */
    function isAdmin(address admin) external view returns (bool);

}
// File: @openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol



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

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

// File: @openzeppelin/contracts/utils/introspection/ERC165Checker.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165Checker.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Library used to query support of an interface declared via {IERC165}.
 *
 * Note that these functions return the actual result of the query: they do not
 * `revert` if an interface is not supported. It is up to the caller to decide
 * what to do in these cases.
 */
library ERC165Checker {
    // As per the EIP-165 spec, no interface should ever match 0xffffffff
    bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;

    /**
     * @dev Returns true if `account` supports the {IERC165} interface,
     */
    function supportsERC165(address account) internal view returns (bool) {
        // Any contract that implements ERC165 must explicitly indicate support of
        // InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid
        return
            _supportsERC165Interface(account, type(IERC165).interfaceId) &&
            !_supportsERC165Interface(account, _INTERFACE_ID_INVALID);
    }

    /**
     * @dev Returns true if `account` supports the interface defined by
     * `interfaceId`. Support for {IERC165} itself is queried automatically.
     *
     * See {IERC165-supportsInterface}.
     */
    function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) {
        // query support of both ERC165 as per the spec and support of _interfaceId
        return supportsERC165(account) && _supportsERC165Interface(account, interfaceId);
    }

    /**
     * @dev Returns a boolean array where each value corresponds to the
     * interfaces passed in and whether they're supported or not. This allows
     * you to batch check interfaces for a contract where your expectation
     * is that some interfaces may not be supported.
     *
     * See {IERC165-supportsInterface}.
     *
     * _Available since v3.4._
     */
    function getSupportedInterfaces(address account, bytes4[] memory interfaceIds)
        internal
        view
        returns (bool[] memory)
    {
        // an array of booleans corresponding to interfaceIds and whether they're supported or not
        bool[] memory interfaceIdsSupported = new bool[](interfaceIds.length);

        // query support of ERC165 itself
        if (supportsERC165(account)) {
            // query support of each interface in interfaceIds
            for (uint256 i = 0; i < interfaceIds.length; i++) {
                interfaceIdsSupported[i] = _supportsERC165Interface(account, interfaceIds[i]);
            }
        }

        return interfaceIdsSupported;
    }

    /**
     * @dev Returns true if `account` supports all the interfaces defined in
     * `interfaceIds`. Support for {IERC165} itself is queried automatically.
     *
     * Batch-querying can lead to gas savings by skipping repeated checks for
     * {IERC165} support.
     *
     * See {IERC165-supportsInterface}.
     */
    function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) {
        // query support of ERC165 itself
        if (!supportsERC165(account)) {
            return false;
        }

        // query support of each interface in _interfaceIds
        for (uint256 i = 0; i < interfaceIds.length; i++) {
            if (!_supportsERC165Interface(account, interfaceIds[i])) {
                return false;
            }
        }

        // all interfaces supported
        return true;
    }

    /**
     * @notice Query if a contract implements an interface, does not check ERC165 support
     * @param account The address of the contract to query for support of an interface
     * @param interfaceId The interface identifier, as specified in ERC-165
     * @return true if the contract at account indicates support of the interface with
     * identifier interfaceId, false otherwise
     * @dev Assumes that account contains a contract that supports ERC165, otherwise
     * the behavior of this method is undefined. This precondition can be checked
     * with {supportsERC165}.
     * Interface identification is specified in ERC-165.
     */
    function _supportsERC165Interface(address account, bytes4 interfaceId) private view returns (bool) {
        bytes memory encodedParams = abi.encodeWithSelector(IERC165.supportsInterface.selector, interfaceId);
        (bool success, bytes memory result) = account.staticcall{gas: 30000}(encodedParams);
        if (result.length < 32) return false;
        return success && abi.decode(result, (bool));
    }
}

// File: @openzeppelin/contracts/token/ERC721/IERC721.sol



// 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;
}

// File: @openzeppelin/contracts/utils/introspection/IERC165.sol



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

pragma solidity ^0.8.0;

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

// File: @openzeppelin/contracts/access/Ownable.sol



// 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);
    }
}

// File: @openzeppelin/contracts/utils/structs/EnumerableSet.sol



// 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;
    }
}

// File: @openzeppelin/contracts/utils/introspection/ERC165.sol



// 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;
    }
}

// File: @openzeppelin/contracts/token/ERC1155/IERC1155.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) external;

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

// File: @openzeppelin/contracts/utils/Context.sol



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

pragma solidity ^0.8.0;

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

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