// File: contracts/mojito/onchain/DutchUtility.sol



// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;

import {IERC721, IERC165} from "../../openzeppelin/token/ERC721/IERC721.sol";
import {IERC1155} from "../../openzeppelin/token/ERC1155/IERC1155.sol";
import {IERC20} from "../../openzeppelin/token/ERC20/IERC20.sol";
import {SafeERC20} from "../../openzeppelin/token/ERC20/utils/SafeERC20.sol";
import {IERC721CreatorCore} from "../../manifold/creator-core/core/IERC721CreatorCore.sol";
import {IERC1155CreatorCore} from "../../manifold/creator-core/core/IERC1155CreatorCore.sol";
import {IDutchAuction} from "../../mojito/interfaces/IDutchAuction.sol";
import {MerkleProof} from "../../openzeppelin/utils/cryptography/MerkleProof.sol";
import "../../openzeppelin/access/Ownable.sol";
import {Address} from "../../openzeppelin/utils/Address.sol";
import {ECDSA} from "../../openzeppelin/utils/cryptography/ECDSA.sol";

/**
 * @title ApprovalCheck, for getting the approval status
 */
interface ApprovalCheck {
    function isApprovedForAll(
        address owner,
        address operator
    ) external view returns (bool);
}

/**
 * @title DutchUtility
 * @dev This is the peripheral contract, which supports the validation and computation parts
 * of the DutchAuction contract.
 */
contract DutchUtility is Ownable {
    using ECDSA for bytes32;

    // The address of the DutchAuction to use via this contract
    IDutchAuction public DutchAuction;

    // To ensure this contract initialized with DutchAuction Address
    bool initialized;

    constructor() {}

    /**
     * @notice initializes the DutchAuction
     * @param dutchAuction The address of the DutchAuction
     */
    function initializeDutchContract(address dutchAuction) external onlyOwner {
        require(Address.isContract(dutchAuction), "should be only contract");
        DutchAuction = IDutchAuction(dutchAuction);
        initialized = true;
    }

    /**
     * @notice Validates auction data before auction creation and updation
     * @param auctionList the list of the auction data
     */
    function __beforeCreateAuction(
        IDutchAuction.DutchAuctionList memory auctionList
    ) external view {
        IDutchAuction.DutchAuctionList memory list = auctionList;
        IDutchAuction.NftContractList memory nftData = list.collectionList;

        require(initialized, "need to initialize the dutch auction");
        // checks to provide only supported interface for nftContractAddress
        require(
            IERC165(nftData.nftContractAddress).supportsInterface(0x80ac58cd) ||
                IERC165(nftData.nftContractAddress).supportsInterface(
                    0xd9b67a26
                ),
            "should provide only supported interface"
        );
        if (IERC165(nftData.nftContractAddress).supportsInterface(0xd9b67a26)) {
            require(
                nftData.unit1155 > 0,
                "quantity should be greater than zero for ERC_1155 NFTS"
            );
            require(
                nftData.saleType != IDutchAuction.TypeOfSale.erc_721_nft_type,
                "invalid nft type"
            );
        }
        // the token id and token owner validation of transfer type of auction
        if (!nftData.isMint) {
            require(
                nftData.startTokenId != 0 && nftData.endTokenId != 0,
                "token start or end Id should not be 0"
            );
            require(
                nftData.endTokenId >= nftData.startTokenId,
                "listed tokens does not support"
            );
            require(
                (nftData.endTokenId - nftData.startTokenId) + 1 ==
                    nftData.noOfTokens,
                "invalid noOfTokens"
            );
            require(
                nftData.tokenOwner != address(0),
                "token Owner should not be zero"
            );
            // The token id and token owner validation of mint type of auction
        } else if (nftData.isMint) {
            if (
                nftData.saleType ==
                IDutchAuction.TypeOfSale.single_tokens_multiple_Quantity
            ) {
                require(
                    nftData.startTokenId == nftData.endTokenId,
                    "token start or end Id should be 0"
                );
            } else {
                require(
                    nftData.startTokenId == 0 && nftData.endTokenId == 0,
                    "token start or end Id should be 0"
                );
            }
            require(
                nftData.tokenOwner == address(0),
                "token Owner should be zero"
            );
        }
        // checks for walletLimit should be greater than zero
        require(nftData.walletLimit > 0, "invalid walletLimit");
        // checks for txnLimit should be greater than zero
        require(nftData.txnLimit > 0, " invalid nft limit/tnx");
        // checks for maxTokenIDRange should be greater than equal to -1.
        require(nftData.maxTokenIDRange >= -1);
        // checks whether reserve Price is less than start Price
        require(
            list.reservedPrice > 0 && list.startingPrice > list.reservedPrice,
            "invalid startPrice or reservedPrice"
        );
        // checks whether reserve Price and timeForPriceDecrement should be greater than zero
        require(
            list.reducePrice > 0 && list.timeForPriceDecrement > 0,
            "invalid reduce price and time"
        );
        // checks whether start time and end time are valid
        require(
            list.auctionStartTime >= block.timestamp &&
                list.auctionStartTime < list.auctionEndTime,
            "invalid auction start or end time"
        );
        // checks whether start time and end time are valid
        require(
            list.halfLifeTime >= list.auctionStartTime &&
                list.halfLifeTime <= list.auctionEndTime,
            "invalid halfLifeTime"
        );
        // checks whether paymentCurrency is contract address or zero address
        require(
            Address.isContract(list.paymentCurrency) ||
                list.paymentCurrency == address(0),
            "auction support only native and erc20 currency"
        );
        // checks for paymentSettlementAddress should not be zero
        require(
            list.payoutList.paymentSettlementAddress != address(0),
            "should provide settlement address"
        );
        // checks for taxSettlementAddress should not be zero
        require(
            list.payoutList.taxSettlementAddress != address(0),
            "should provide settlement address"
        );
    }

    /**
     * @notice Validation before buy in dutch Auction
     * @param dutchAuctionID the id of the created auction
     */
    function __buyValidation(
        string memory dutchAuctionID,
        address buyer,
        IDutchAuction.BuyList memory buyList
    ) external view returns (uint256 refundAmount, uint256 refundTax) {
        IDutchAuction.DutchAuctionList memory list = DutchAuction.getListings(
            dutchAuctionID
        );
        IDutchAuction.NftContractList memory nftData = list.collectionList;
        IDutchAuction.BuyerDetails memory buyerInfo = DutchAuction.getBuyerInfo(
            dutchAuctionID,
            buyer
        );

        require(initialized, "need to initialize the dutch auction");

        bytes32 leaf = keccak256(abi.encodePacked(buyer));
        // checks whether the buyer is a blacklisted buyer
        if (list.collectionList.blacklistedBuyers != bytes32(0)) {
            require(
                !MerkleProof.verify(
                    buyList.blacklistedProof,
                    list.collectionList.blacklistedBuyers,
                    leaf
                ),
                "bidder should not be a blacklisted Buyer"
            );
        }
        // checks whether the current time has crossed the start time
        require(
            list.auctionStartTime <= uint64(block.timestamp),
            "the auction has not started"
        );
        // checks whether the current time has not crossed the end time
        require(
            list.auctionEndTime > uint64(block.timestamp),
            "the auction has already ended or canceled"
        );

        // validates the discount data
        if (nftData.isSignerRequired) {
            __discountValidation(buyList.discount, buyer);
        } else if (buyList.discount.discountPercentage > 0) {
            __discountValidation(buyList.discount, buyer);
        }
        // sets current price based on discount
        uint256 currentPrice = getCurrentDutchPrice(dutchAuctionID);
        uint256 purchasePrice = 0;
        if (nftData.isDiscountRequired) {
            if (buyList.discount.discountPercentage > 0) {
                currentPrice -= ((currentPrice *
                    buyList.discount.discountPercentage) / 10000);
            }
        }

        // validates the buy data if ERC1155 - Type 1
        if (
            list.collectionList.saleType ==
            IDutchAuction.TypeOfSale.single_tokens_multiple_Quantity
        ) {
            require(
                buyList.quantity == 1 && buyList.unit1155 > 0,
                "can buy only single nft with multiple quantity"
            );
            // checks for transaction limit
            require(
                list.collectionList.txnLimit >= buyList.unit1155,
                "tnx limit exceeds"
            );
            // checks for wallet limit
            require(
                buyerInfo.totalCap + buyList.unit1155 <=
                    list.collectionList.walletLimit,
                "reached the maximum nft limit"
            );
            // checks for MaxCap
            require(
                (DutchAuction.getLatestSaleInfo(dutchAuctionID)).currentSupply +
                    buyList.unit1155 <=
                    list.collectionList.unit1155,
                "maxQauntity limit reached"
            );
            // validates the price with units and price
            require(
                buyList.price >= buyList.unit1155 * currentPrice,
                "invalid bid amount"
            );
            // updates the actual price based on the current price for given uints
            purchasePrice = buyList.unit1155 * currentPrice;
        }
        // validates the buy data if ERC721 & ERC1155 - Type 2
        else if (
            list.collectionList.saleType ==
            IDutchAuction.TypeOfSale.multiple_tokens_with_Same_Quantity ||
            list.collectionList.saleType ==
            IDutchAuction.TypeOfSale.erc_721_nft_type
        ) {
            require(
                buyList.quantity >= 1 && buyList.unit1155 == 0,
                "can buy only single nft with multiple quantity"
            );

            // checks for transaction limit
            require(
                list.collectionList.txnLimit >= buyList.quantity,
                "tnx limit exceeds"
            );
            // checks for wallet limit
            require(
                buyerInfo.totalCap + buyList.quantity <=
                    list.collectionList.walletLimit,
                "reached the maximum nft limit"
            );
            // checks for MaxCap
            require(
                (DutchAuction.getLatestSaleInfo(dutchAuctionID)).currentSupply +
                    buyList.quantity <=
                    list.collectionList.noOfTokens,
                "maxQauntity limit reached"
            );
            // validates the price with quantity and price
            require(
                buyList.price >= buyList.quantity * currentPrice,
                "invalid bid amount"
            );
            // updates the actual price based on the current price for given quantity
            purchasePrice = buyList.quantity * currentPrice;
        }

        // calculates the RefundAmount and RefundTax
        refundAmount = buyList.price - purchasePrice;
        if (buyList.discount.discountPercentage == 10000) {
            refundTax = 0;
        } else {
            uint256 taxPercentage = (buyList.tax * (10 ** 18)) / buyList.price;
            refundTax = ((refundAmount) * taxPercentage) / (10 ** 18);
        }

        if (list.paymentCurrency != address(0)) {
            // checks the buyer has sufficient amount to buy the nft
            require(
                IERC20(list.paymentCurrency).balanceOf(buyer) >=
                    purchasePrice + (buyList.tax - refundTax),
                "insufficient ERC20 funds"
            );
            // checks the buyer has provided approval for the contract to transfer the amount
            require(
                IERC20(list.paymentCurrency).allowance(
                    buyer,
                    address(DutchAuction)
                ) >= purchasePrice + (buyList.tax - refundTax),
                "insufficient approval from an ERC20 Token"
            );
        }

        //checks for collection nft approval
        if (!list.collectionList.isMint) {
            require(
                ApprovalCheck(list.collectionList.nftContractAddress)
                    .isApprovedForAll(
                        list.collectionList.tokenOwner,
                        address(DutchAuction)
                    ),
                "need collection approval"
            );
        }
    }

    /**
     * @notice Gets the current dutch auction price
     * @param dutchAuctionId the id of the created auction
     */
    function getCurrentDutchPrice(
        string memory dutchAuctionId
    ) public view returns (uint256 currentPrice) {
        IDutchAuction.DutchAuctionList memory list = DutchAuction.getListings(
            dutchAuctionId
        );
        require(initialized, "need to initialize the dutch auction");
        require(
            list.auctionEndTime >= block.timestamp &&
                list.auctionStartTime <= block.timestamp,
            "auction closed already or not started"
        );
        // sets halflife time slot
        uint256 halfTimeSlot = (list.halfLifeTime - list.auctionStartTime) /
            list.timeForPriceDecrement;
        // sets current time Slot
        uint256 currentTimeSlot = (block.timestamp - list.auctionStartTime) /
            list.timeForPriceDecrement;

        if (list.startingPrice > (currentTimeSlot * list.reducePrice)) {
            // calcualtes the current price after half life time
            if (currentTimeSlot > halfTimeSlot) {
                currentPrice =
                    (list.startingPrice - (halfTimeSlot * list.reducePrice)) /
                    (2 ** (currentTimeSlot - halfTimeSlot));
            }
            // calcualtes the current price after half life time
            else {
                currentPrice =
                    list.startingPrice -
                    (currentTimeSlot * list.reducePrice);
            }
        }
        // sets reserverd price as current price if it is lower than reserved price
        if (currentPrice < list.reservedPrice) {
            currentPrice = list.reservedPrice;
        }
    }

    /**
     * @notice Gets the dutch auction price for given timestamp
     * @param dutchAuctionId the id of the created auction
     * @param timeStamp the time stamp value to get auction price. if it is -1,returns the current price.
     */
    function getDutchAuctionPrice(
        string memory dutchAuctionId,
        int256 timeStamp
    ) public view returns (uint256 price, uint256 timeStampValue) {
        IDutchAuction.DutchAuctionList memory list = DutchAuction.getListings(
            dutchAuctionId
        );
        require(initialized, "need to initialize the dutch auction");
        require(
            DutchAuction.usedAuctionId(dutchAuctionId),
            "unsupported auction"
        );
        // gives the current price
        if (timeStamp == -1) {
            price = getCurrentDutchPrice(dutchAuctionId);
            timeStampValue = block.timestamp;
        }
        // gives the price for given timestamp
        else {
            require(
                list.auctionEndTime >= uint256(timeStamp) &&
                    list.auctionStartTime <= uint256(timeStamp),
                "auction closed already or not started"
            );
            // sets halflife time slot
            uint256 halfTimeSlot = (list.halfLifeTime - list.auctionStartTime) /
                list.timeForPriceDecrement;
            // sets current time Slot
            uint256 currentTimeSlot = (uint256(timeStamp) -
                list.auctionStartTime) / list.timeForPriceDecrement;

            if (list.startingPrice > (currentTimeSlot * list.reducePrice)) {
                // calcualtes the current price after half life time
                if (currentTimeSlot > halfTimeSlot) {
                    price =
                        (list.startingPrice -
                            (halfTimeSlot * list.reducePrice)) /
                        (2 ** (currentTimeSlot - halfTimeSlot));
                }
                // calcualtes the current price after half life time
                else {
                    price =
                        list.startingPrice -
                        (currentTimeSlot * list.reducePrice);
                }
            }
            // sets reserverd price as current price if it is lower than reserved price
            if (price < list.reservedPrice) {
                price = list.reservedPrice;
            }
            return (price, uint256(timeStamp));
        }
    }

    /**
     * @notice Gets the claimable amount in rebate type auction
     * @param dutchAuctionID the id of the created auction
     * @param buyer the address of buyer wallet
     */
    function claimable(
        string memory dutchAuctionID,
        address buyer
    ) public view returns (uint256 totalClaimable, uint256 totalTaxClaimable) {
        IDutchAuction.DutchAuctionList memory list = DutchAuction.getListings(
            dutchAuctionID
        );
        IDutchAuction.BuyerDetails memory buyerInfo = DutchAuction.getBuyerInfo(
            dutchAuctionID,
            buyer
        );
        IDutchAuction.LatestSaleDetails memory saleDetails = DutchAuction
            .getLatestSaleInfo(dutchAuctionID);

        require(initialized, "need to initialize the dutch auction");
        require(list.collectionList.isRebate, "not applicable");
        // calculates the totalClaimable and totalTaxClaimable related with discounted buy
        for (uint256 i = 0; i < buyerInfo.priceDiscount.length; i++) {
            if (
                buyerInfo.priceDiscount[i] >
                (saleDetails.finalPrice * buyerInfo.quantityDiscount[i])
            ) {
                totalClaimable +=
                    (buyerInfo.priceDiscount[i]) -
                    (saleDetails.finalPrice * buyerInfo.quantityDiscount[i]);
                // calculates the actual tax percnetage
                uint256 percentage = (buyerInfo.taxDiscount[i] * 10 ** 18) /
                    (buyerInfo.priceDiscount[i]);
                // adds the tax amount
                totalTaxClaimable +=
                    (((buyerInfo.priceDiscount[i]) -
                        (saleDetails.finalPrice *
                            buyerInfo.quantityDiscount[i])) * percentage) /
                    10 ** 18;
            }
        }

        // calculates the totalClaimable and totalTaxClaimable with zero discounted buy
        for (uint256 i = 0; i < buyerInfo.price.length; i++) {
            totalClaimable +=
                (buyerInfo.price[i]) -
                (saleDetails.finalPrice * buyerInfo.quantity[i]);
            // calculates of tax percnetage
            uint256 percentage = (buyerInfo.tax[i] * 10 ** 18) /
                (buyerInfo.price[i]);
            // adds the tax amount
            totalTaxClaimable +=
                (((buyerInfo.price[i]) -
                    (saleDetails.finalPrice * buyerInfo.quantity[i])) *
                    percentage) /
                10 ** 18;
        }
    }

    /**
     * @notice Gets the total settlement amount and tax for ending auction
     * @param dutchAuctionID the id of the created auction
     */
    function computeSettlementAmountAndTax(
        string memory dutchAuctionID
    ) external view returns (uint256 totalAmount, uint256 totalTax) {
        require(initialized, "need to initialize the Dutch Auction");

        IDutchAuction.DutchAuctionList memory list = DutchAuction.getListings(
            dutchAuctionID
        );
        IDutchAuction.NftContractList memory nftData = list.collectionList;
        address[] memory buyerAddress = DutchAuction.getBuyerAddress(
            dutchAuctionID
        );
        IDutchAuction.LatestSaleDetails memory saleDetails = DutchAuction
            .getLatestSaleInfo(dutchAuctionID);

        totalTax = 0;
        // calculates the total amount for zero discounted Tokens
        totalAmount = saleDetails.finalPrice * saleDetails.zeroDiscountSupply;

        uint256 quantityDiscount;
        for (uint256 i = 0; i < buyerAddress.length; i++) {
            address walletAddress = buyerAddress[i];
            IDutchAuction.BuyerDetails memory buyerInfo = DutchAuction
                .getBuyerInfo(dutchAuctionID, walletAddress);

            // calculates the total amount & tax for discounted related tokens
            for (uint256 j = 0; j < buyerInfo.priceDiscount.length; j++) {
                quantityDiscount += buyerInfo.quantityDiscount[j];
                // calculates the tax percnetage
                uint256 percentage = (buyerInfo.taxDiscount[j] * 10 ** 18) /
                    (buyerInfo.priceDiscount[j]);
                // adds the total settlement amount and tax amount
                if (
                    buyerInfo.priceDiscount[j] >
                    (saleDetails.finalPrice * buyerInfo.quantityDiscount[j])
                ) {
                    totalAmount += saleDetails.finalPrice;
                    if (buyerInfo.taxDiscount[j] != 0) {
                        totalTax +=
                            ((saleDetails.finalPrice *
                                buyerInfo.quantityDiscount[j]) * percentage) /
                            10 ** 18;
                    }
                } else {
                    totalAmount += buyerInfo.priceDiscount[j];
                    if (buyerInfo.taxDiscount[j] != 0) {
                        totalTax +=
                            (buyerInfo.priceDiscount[j] * percentage) /
                            10 ** 18;
                    }
                }
            }
            // calculates the tax for zero discounted tokens
            for (uint256 j = 0; j < buyerInfo.price.length; j++) {
                if (buyerInfo.tax[j] != 0) {
                    uint256 percentage = (buyerInfo.tax[j] * 10 ** 18) /
                        (buyerInfo.price[j]);
                    totalTax +=
                        ((saleDetails.finalPrice * buyerInfo.quantity[j]) *
                            percentage) /
                        10 ** 18;
                }
            }
        }
        // validates the sale before returning the values.
        require(
            saleDetails.zeroDiscountSupply +
                saleDetails.fullDiscountSupply +
                quantityDiscount ==
                saleDetails.currentSupply,
            " invalid Call"
        );
        if (nftData.isRebate) {
            if (list.paymentCurrency == address(0)) {
                require(
                    address(DutchAuction).balance >= totalAmount + totalTax,
                    "no required balance"
                );
            } else {
                require(
                    IERC20(list.paymentCurrency).balanceOf(
                        address(DutchAuction)
                    ) >= totalAmount + totalTax,
                    "no required balance"
                );
            }
        }
    }

    /**
     * @notice validtes the discount data
     * @param discount the details of discount
     * @param buyer the buyer address
     */
    function __discountValidation(
        IDutchAuction.Discount memory discount,
        address buyer
    ) internal view {
        // Checks whether that discount percentage is not more than 100
        require(
            discount.discountPercentage <= 10000,
            "the total fee basis point should be less than 10000"
        );
        // Checks whether that signer is admin of the dutch auction
        require(
            DutchAuction.isAdmin(discount.signer),
            "only owner or admin can sign for discount"
        );
        // Checks whether that signature is used already
        require(
            !DutchAuction.discountUsed(discount.signature),
            "the discount code is already used"
        );
        // Checks whether that signature is valid
        require(
            _verifySignature(buyer, discount),
            "invalid discount signature"
        );
    }

    /**
     * @notice Verifes the discount signature
     * @param buyer the buyer address
     * @param discount the details of discount
     */
    function _verifySignature(
        address buyer,
        IDutchAuction.Discount memory discount
    ) internal view returns (bool) {
        require(
            discount.expirationTime >= block.timestamp,
            "discount signature is already expired"
        );
        return
            keccak256(
                abi.encodePacked(
                    buyer,
                    discount.discountPercentage,
                    discount.expirationTime,
                    discount.nonce,
                    block.chainid
                )
            ).toEthSignedMessageHash().recover(discount.signature) ==
            discount.signer;
    }
}

// File: contracts/openzeppelin/utils/cryptography/ECDSA.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s;
        uint8 v;
        assembly {
            s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
            v := add(shr(255, vs), 27)
        }
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }
        if (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// File: contracts/openzeppelin/utils/Address.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Address.sol)

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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



// SPDX-License-Identifier: MIT

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 () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), 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 {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: contracts/openzeppelin/utils/cryptography/MerkleProof.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

/**
 * @dev These functions deal with verification of Merkle Trees proofs.
 *
 * The proofs can be generated using the JavaScript library
 * https://github.com/miguelmota/merkletreejs[merkletreejs].
 * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
 *
 * See `test/utils/cryptography/MerkleProof.test.js` for some examples.
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(
        bytes32[] memory proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     *
     * _Available since v4.4._
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            bytes32 proofElement = proof[i];
            if (computedHash <= proofElement) {
                // Hash(current computed hash + current element of the proof)
                computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
            } else {
                // Hash(current element of the proof + current computed hash)
                computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
            }
        }
        return computedHash;
    }
}

// File: contracts/mojito/interfaces/IDutchAuction.sol



// SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;

/**
 * @title Interface for Dutch Auction
 */
interface IDutchAuction {
    struct NftContractList {
        // The NFT contract of Erc-721/1155 for Sale
        address nftContractAddress;
        // The From tokenId of the nft for sale
        uint256 startTokenId;
        // The To tokenId of the nft for sale
        uint256 endTokenId;
        // The quantity of each token If Erc-1155 collection
        uint256 unit1155;
        // The address of the token owner
        address tokenOwner;
        // total number of nfts for sale
        uint64 noOfTokens;
        // The limit which an each address is allowed
        uint64 walletLimit;
        // The limit for each transaction
        uint64 txnLimit;
        // To specify for mint on Demand
        bool isMint;
        // the max token id randge to mint
        int256 maxTokenIDRange;
        // To specify nft for Instant Delivery
        bool isInstantDeliver;
        // To be Specified for allowing rebate
        bool isRebate;
        // To be Specified for allowing discount
        bool isDiscountRequired;
        // To specify for AuthSign for buy
        bool isSignerRequired;
        // select the type of sale
        TypeOfSale saleType;
        // The root hash of the whitelisted buyers
        bytes32 blacklistedBuyers;
    }

    enum TypeOfSale {
        // refers for sale type of Erc-721 collections
        erc_721_nft_type,
        // refers for sale type of Erc-1155 collections with multiple Quantity
        single_tokens_multiple_Quantity,
        // refers for sale type of Erc-1155 collections with multiple tokens with Same Quantity
        multiple_tokens_with_Same_Quantity
    }

    struct DutchAuctionList {
        // details of the nft collection list
        NftContractList collectionList;
        // The starting price of the sale
        uint128 startingPrice;
        // The minimum price of the sale
        uint128 reservedPrice;
        // The price to be reduced in certain time interval
        uint128 reducePrice;
        // The time of the sale starts
        uint32 auctionStartTime;
        // The time of the sale ends
        uint32 auctionEndTime;
        // The time interval of the price decrement
        uint32 timeForPriceDecrement;
        // The start time for price decrement to half of previous price
        uint32 halfLifeTime;
        // The allowed Payment Currency for the sale
        address paymentCurrency;
        // The list of settlement Address and Settlement Price
        SettlementList payoutList;
    }

    struct SettlementList {
        // The settlement address for the listed tokens
        address payable paymentSettlementAddress;
        // The tax settlement address for settlement of tax fee
        address payable taxSettlementAddress;
        // The commission address for settlement of commission fee
        address payable commissionAddress;
        // The platform address for settlement of platform fee
        address payable platformSettlementAddress;
        // The commission fee given in basis points
        uint16 commissionFeePercentage;
        // The platform fee given in basis points
        uint16 platformFeePercentage;
    }

    struct BuyerDetails {
        // The price of the NFTs while buying
        uint256[] price;
        // The quatity of the nfts
        uint256[] quantity;
        // The tax for price
        uint256[] tax;
        // The discount price of the nfts
        uint256[] priceDiscount;
        // The nft quantity bought at the discount price
        uint256[] quantityDiscount;
        // The tax for discount price
        uint256[] taxDiscount;
        // The Total tokens purchased by seller
        uint256 totalCap;
        // The rebate claimed status
        bool rebateClaimed;
    }

    struct LatestSaleDetails {
        // The price of the latest sale
        uint256 finalPrice;
        // The id of the next token to buy
        uint256 nextTokenId;
        // The total number of tokens purchased
        uint256 currentSupply;
        // The total number of tokens purchased with full discount
        uint256 fullDiscountSupply;
        // The total number of tokens purchased with zero discount
        uint256 zeroDiscountSupply;
        // represents that auction is ended or not
        bool auctionEnded;
        // represents that maxId reached
        bool isReachedMaxId;
    }

    struct Discount {
        // The discount percentage
        uint16 discountPercentage;
        // The expire timeof discount signature
        uint32 expirationTime;
        // The nonce value
        string nonce;
        // The signature generated by admin
        bytes signature;
        // The signer of the signature.
        address signer;
    }

    struct BuyList {
        // The buy amount to purchase NFT(s)
        uint256 price;
        // The tax amount of the purchase
        uint256 tax;
        // The number of tokens to be purchased
        uint256 quantity;
        // The quantity for 1155 if ERC1155
        uint256 unit1155;
        // The merkle tree path of buyer address
        bytes32[] blacklistedProof;
        // the discount information
        IDutchAuction.Discount discount;
    }

    function usedAuctionId(string memory dutchAuctionID)
    external view returns (bool);

    /**
     * @notice checks the address is admin address ornot
     * @param walletAddress the id of the created auction
     */
    function isAdmin(address walletAddress) external view returns (bool);

    /**
     * @notice checks the signature is used already or not
     * @param signature the discount signature
     */
    function discountUsed(bytes memory signature) external view returns (bool);

    /**
     * @notice gets the detils of the listed sale
     * @param dutchAuctionID the id of the created auction
     */
    function getListings(
        string memory dutchAuctionID
    ) external view returns (DutchAuctionList memory auctionist);

    /**
     * @notice gets the detils collection details of listed sale
     * @param dutchAuctionID the id of the created auction
     */
    function getLatestSaleInfo(
        string memory dutchAuctionID
    ) external view returns (LatestSaleDetails memory saleDetails);

    /**
     * @notice gets the buyers sale info of the listed sale
     * @param dutchAuctionID the id of the created auction
     * @param buyer the address of the buyer
     */
    function getBuyerInfo(
        string memory dutchAuctionID,
        address buyer
    ) external view returns (BuyerDetails memory buyerDetails);

    /**
     * @notice gets the list of all the buyers in the sale
     * @param dutchAuctionID the id of the created auction
     */
    function getBuyerAddress(
        string memory dutchAuctionID
    ) external view returns (address[] memory buyers);

    /**
     * @notice validates auction data before auction creation and updation
     * @param auctionList the List of the auction data
     */
    function __beforeCreateAuction(
        DutchAuctionList memory auctionList
    ) external view;

    /**
     * @notice validates tha buy data before buy in dutch Auction
     * @param dutchAuctionID the id of the created auction
     */
    function __buyValidation(
        string memory dutchAuctionID,
        address buyer,
        IDutchAuction.BuyList memory buyList
    ) external view returns (uint256, uint256);

    /**
     * @notice gets the current dutch auction price
     * @param dutchAuctionId the id of the created auction
     */
    function getCurrentDutchPrice(
        string memory dutchAuctionId
    ) external view returns (uint256 currentPrice);

    /**
     * @notice gets the claimable amount in rebate type auction
     * @param dutchAuctionID the id of the created auction
     * @param buyer the address of buyer wallet
     */
    function claimable(
        string memory dutchAuctionID,
        address buyer
    ) external view returns (uint256 totalClaimable, uint256 totalTaxClaimable);

    /**
     * @notice gets the settlement amount and tax for endAuction()
     * @param dutchAuctionID the id of the created auction
     */
    function computeSettlementAmountAndTax(
        string memory dutchAuctionID
    ) external returns (uint256, uint256);
}

// File: contracts/manifold/creator-core/core/IERC1155CreatorCore.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "./CreatorCore.sol";

/**
 * @dev Core ERC1155 creator interface
 */
interface IERC1155CreatorCore is ICreatorCore {

    /**
     * @dev mint a token with no extension. Can only be called by an admin.
     *
     * @param to       - Can be a single element array (all tokens go to same address) or multi-element array (single token to many recipients)
     * @param amounts  - Can be a single element array (all recipients get the same amount) or a multi-element array
     * @param uris     - If no elements, all tokens use the default uri.
     *                   If any element is an empty string, the corresponding token uses the default uri.
     *
     *
     * Requirements: If to is a multi-element array, then uris must be empty or single element array
     *               If to is a multi-element array, then amounts must be a single element array or a multi-element array of the same size
     *               If to is a single element array, uris must be empty or the same length as amounts
     *
     * Examples:
     *    mintBaseNew(['0x....1', '0x....2'], [1], [])
     *        Mints a single new token, and gives 1 each to '0x....1' and '0x....2'.  Token uses default uri.
     *    
     *    mintBaseNew(['0x....1', '0x....2'], [1, 2], [])
     *        Mints a single new token, and gives 1 to '0x....1' and 2 to '0x....2'.  Token uses default uri.
     *    
     *    mintBaseNew(['0x....1'], [1, 2], ["", "http://token2.com"])
     *        Mints two new tokens to '0x....1'. 1 of the first token, 2 of the second.  1st token uses default uri, second uses "http://token2.com".
     *    
     * @return Returns list of tokenIds minted
     */
    function mintBaseNew(address[] calldata to, uint256[] calldata amounts, string[] calldata uris) external returns (uint256[] memory);

    /**
     * @dev batch mint existing token with no extension. Can only be called by an admin.
     *
     * @param to        - Can be a single element array (all tokens go to same address) or multi-element array (single token to many recipients)
     * @param tokenIds  - Can be a single element array (all recipients get the same token) or a multi-element array
     * @param amounts   - Can be a single element array (all recipients get the same amount) or a multi-element array
     *
     * Requirements: If any of the parameters are multi-element arrays, they need to be the same length as other multi-element arrays
     *
     * Examples:
     *    mintBaseExisting(['0x....1', '0x....2'], [1], [10])
     *        Mints 10 of tokenId 1 to each of '0x....1' and '0x....2'.
     *    
     *    mintBaseExisting(['0x....1', '0x....2'], [1, 2], [10, 20])
     *        Mints 10 of tokenId 1 to '0x....1' and 20 of tokenId 2 to '0x....2'.
     *    
     *    mintBaseExisting(['0x....1'], [1, 2], [10, 20])
     *        Mints 10 of tokenId 1 and 20 of tokenId 2 to '0x....1'.
     *    
     *    mintBaseExisting(['0x....1', '0x....2'], [1], [10, 20])
     *        Mints 10 of tokenId 1 to '0x....1' and 20 of tokenId 1 to '0x....2'.
     *    
     */
    function mintBaseExisting(address[] calldata to, uint256[] calldata tokenIds, uint256[] calldata amounts) external;

    /**
     * @dev mint a token from an extension. Can only be called by a registered extension.
     *
     * @param to       - Can be a single element array (all tokens go to same address) or multi-element array (single token to many recipients)
     * @param amounts  - Can be a single element array (all recipients get the same amount) or a multi-element array
     * @param uris     - If no elements, all tokens use the default uri.
     *                   If any element is an empty string, the corresponding token uses the default uri.
     *
     *
     * Requirements: If to is a multi-element array, then uris must be empty or single element array
     *               If to is a multi-element array, then amounts must be a single element array or a multi-element array of the same size
     *               If to is a single element array, uris must be empty or the same length as amounts
     *
     * Examples:
     *    mintExtensionNew(['0x....1', '0x....2'], [1], [])
     *        Mints a single new token, and gives 1 each to '0x....1' and '0x....2'.  Token uses default uri.
     *    
     *    mintExtensionNew(['0x....1', '0x....2'], [1, 2], [])
     *        Mints a single new token, and gives 1 to '0x....1' and 2 to '0x....2'.  Token uses default uri.
     *    
     *    mintExtensionNew(['0x....1'], [1, 2], ["", "http://token2.com"])
     *        Mints two new tokens to '0x....1'. 1 of the first token, 2 of the second.  1st token uses default uri, second uses "http://token2.com".
     *    
     * @return Returns list of tokenIds minted
     */
    function mintExtensionNew(address[] calldata to, uint256[] calldata amounts, string[] calldata uris) external returns (uint256[] memory);

    /**
     * @dev batch mint existing token from extension. Can only be called by a registered extension.
     *
     * @param to        - Can be a single element array (all tokens go to same address) or multi-element array (single token to many recipients)
     * @param tokenIds  - Can be a single element array (all recipients get the same token) or a multi-element array
     * @param amounts   - Can be a single element array (all recipients get the same amount) or a multi-element array
     *
     * Requirements: If any of the parameters are multi-element arrays, they need to be the same length as other multi-element arrays
     *
     * Examples:
     *    mintExtensionExisting(['0x....1', '0x....2'], [1], [10])
     *        Mints 10 of tokenId 1 to each of '0x....1' and '0x....2'.
     *    
     *    mintExtensionExisting(['0x....1', '0x....2'], [1, 2], [10, 20])
     *        Mints 10 of tokenId 1 to '0x....1' and 20 of tokenId 2 to '0x....2'.
     *    
     *    mintExtensionExisting(['0x....1'], [1, 2], [10, 20])
     *        Mints 10 of tokenId 1 and 20 of tokenId 2 to '0x....1'.
     *    
     *    mintExtensionExisting(['0x....1', '0x....2'], [1], [10, 20])
     *        Mints 10 of tokenId 1 to '0x....1' and 20 of tokenId 1 to '0x....2'.
     *    
     */
    function mintExtensionExisting(address[] calldata to, uint256[] calldata tokenIds, uint256[] calldata amounts) external;

    /**
     * @dev burn tokens. Can only be called by token owner or approved address.
     * On burn, calls back to the registered extension's onBurn method
     */
    function burn(address account, uint256[] calldata tokenIds, uint256[] calldata amounts) external;

    /**
     * @dev Total amount of tokens in with a given tokenId.
     */
    function totalSupply(uint256 tokenId) external view returns (uint256);
}
// File: contracts/manifold/creator-core/core/IERC721CreatorCore.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "./ICreatorCore.sol";

/**
 * @dev Core ERC721 creator interface
 */
interface IERC721CreatorCore is ICreatorCore {

    /**
     * @dev mint a token with no extension. Can only be called by an admin.
     * Returns tokenId minted
     */
    function mintBase(address to) external returns (uint256);

    /**
     * @dev mint a token with no extension. Can only be called by an admin.
     * Returns tokenId minted
     */
    function mintBase(address to, string calldata uri) external returns (uint256);

    /**
     * @dev batch mint a token with no extension. Can only be called by an admin.
     * Returns tokenId minted
     */
    function mintBaseBatch(address to, uint16 count) external returns (uint256[] memory);

    /**
     * @dev batch mint a token with no extension. Can only be called by an admin.
     * Returns tokenId minted
     */
    function mintBaseBatch(address to, string[] calldata uris) external returns (uint256[] memory);

    /**
     * @dev mint a token. Can only be called by a registered extension.
     * Returns tokenId minted
     */
    function mintExtension(address to) external returns (uint256);

    /**
     * @dev mint a token. Can only be called by a registered extension.
     * Returns tokenId minted
     */
    function mintExtension(address to, string calldata uri) external returns (uint256);

    /**
     * @dev batch mint a token. Can only be called by a registered extension.
     * Returns tokenIds minted
     */
    function mintExtensionBatch(address to, uint16 count) external returns (uint256[] memory);

    /**
     * @dev batch mint a token. Can only be called by a registered extension.
     * Returns tokenId minted
     */
    function mintExtensionBatch(address to, string[] calldata uris) external returns (uint256[] memory);

    /**
     * @dev burn a token. Can only be called by token owner or approved address.
     * On burn, calls back to the registered extension's onBurn method
     */
    function burn(uint256 tokenId) external;

}
// File: contracts/openzeppelin/token/ERC20/utils/SafeERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// File: contracts/openzeppelin/token/ERC20/IERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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 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: contracts/openzeppelin/token/ERC721/IERC721.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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`, 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: contracts/openzeppelin/utils/Strings.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Strings.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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: contracts/openzeppelin/utils/Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

// File: contracts/manifold/creator-core/core/ICreatorCore.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

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

/**
 * @dev Core creator interface
 */
interface ICreatorCore is IERC165 {
    event ExtensionRegistered(
        address indexed extension,
        address indexed sender
    );
    event ExtensionUnregistered(
        address indexed extension,
        address indexed sender
    );
    event ExtensionBlacklisted(
        address indexed extension,
        address indexed sender
    );
    event MintPermissionsUpdated(
        address indexed extension,
        address indexed permissions,
        address indexed sender
    );
    event RoyaltiesUpdated(
        uint256 indexed tokenId,
        address payable[] receivers,
        uint256[] basisPoints
    );
    event DefaultRoyaltiesUpdated(
        address payable[] receivers,
        uint256[] basisPoints
    );
    event ExtensionRoyaltiesUpdated(
        address indexed extension,
        address payable[] receivers,
        uint256[] basisPoints
    );
    event ExtensionApproveTransferUpdated(
        address indexed extension,
        bool enabled
    );

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

    /**
     * @dev add an extension.  Can only be called by contract owner or admin.
     * extension address must point to a contract implementing ICreatorExtension.
     * Returns True if newly added, False if already added.
     */
    function registerExtension(address extension, string calldata baseURI)
        external;

    /**
     * @dev add an extension.  Can only be called by contract owner or admin.
     * extension address must point to a contract implementing ICreatorExtension.
     * Returns True if newly added, False if already added.
     */
    function registerExtension(
        address extension,
        string calldata baseURI,
        bool baseURIIdentical
    ) external;

    /**
     * @dev add an extension.  Can only be called by contract owner or admin.
     * Returns True if removed, False if already removed.
     */
    function unregisterExtension(address extension) external;

    /**
     * @dev blacklist an extension.  Can only be called by contract owner or admin.
     * This function will destroy all ability to reference the metadata of any tokens created
     * by the specified extension. It will also unregister the extension if needed.
     * Returns True if removed, False if already removed.
     */
    function blacklistExtension(address extension) external;

    /**
     * @dev set the baseTokenURI of an extension.  Can only be called by extension.
     */
    function setBaseTokenURIExtension(string calldata uri) external;

    /**
     * @dev set the baseTokenURI of an extension.  Can only be called by extension.
     * For tokens with no uri configured, tokenURI will return "uri+tokenId"
     */
    function setBaseTokenURIExtension(string calldata uri, bool identical)
        external;

    /**
     * @dev set the common prefix of an extension.  Can only be called by extension.
     * If configured, and a token has a uri set, tokenURI will return "prefixURI+tokenURI"
     * Useful if you want to use ipfs/arweave
     */
    function setTokenURIPrefixExtension(string calldata prefix) external;

    /**
     * @dev set the tokenURI of a token extension.  Can only be called by extension that minted token.
     */
    function setTokenURIExtension(uint256 tokenId, string calldata uri)
        external;

    /**
     * @dev set the tokenURI of a token extension for multiple tokens.  Can only be called by extension that minted token.
     */
    function setTokenURIExtension(
        uint256[] memory tokenId,
        string[] calldata uri
    ) external;

    /**
     * @dev set the baseTokenURI for tokens with no extension.  Can only be called by owner/admin.
     * For tokens with no uri configured, tokenURI will return "uri+tokenId"
     */
    function setBaseTokenURI(string calldata uri) external;

    /**
     * @dev set the common prefix for tokens with no extension.  Can only be called by owner/admin.
     * If configured, and a token has a uri set, tokenURI will return "prefixURI+tokenURI"
     * Useful if you want to use ipfs/arweave
     */
    function setTokenURIPrefix(string calldata prefix) external;

    /**
     * @dev set the tokenURI of a token with no extension.  Can only be called by owner/admin.
     */
    function setTokenURI(uint256 tokenId, string calldata uri) external;

    /**
     * @dev set the tokenURI of multiple tokens with no extension.  Can only be called by owner/admin.
     */
    function setTokenURI(uint256[] memory tokenIds, string[] calldata uris)
        external;

    /**
     * @dev set a permissions contract for an extension.  Used to control minting.
     */
    function setMintPermissions(address extension, address permissions)
        external;

    /**
     * @dev Configure so transfers of tokens created by the caller (must be extension) gets approval
     * from the extension before transferring
     */
    function setApproveTransferExtension(bool enabled) external;

    /**
     * @dev get the extension of a given token
     */
    function tokenExtension(uint256 tokenId) external view returns (address);

    /**
     * @dev Set default royalties
     */
    function setRoyalties(
        address payable[] calldata receivers,
        uint256[] calldata basisPoints
    ) external;

    /**
     * @dev Set royalties of a token
     */
    function setRoyalties(
        uint256 tokenId,
        address payable[] calldata receivers,
        uint256[] calldata basisPoints
    ) external;

    /**
     * @dev Set royalties of an extension
     */
    function setRoyaltiesExtension(
        address extension,
        address payable[] calldata receivers,
        uint256[] calldata basisPoints
    ) external;

    /**
     * @dev Get royalites of a token.  Returns list of receivers and basisPoints
     */
    function getRoyalties(uint256 tokenId)
        external
        view
        returns (address payable[] memory, uint256[] memory);

    // Royalty support for various other standards
    function getFeeRecipients(uint256 tokenId)
        external
        view
        returns (address payable[] memory);

    function getFeeBps(uint256 tokenId)
        external
        view
        returns (uint256[] memory);

    function getFees(uint256 tokenId)
        external
        view
        returns (address payable[] memory, uint256[] memory);

    function royaltyInfo(uint256 tokenId, uint256 value)
        external
        view
        returns (address, uint256);
}

// File: contracts/manifold/creator-core/core/CreatorCore.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "../../../openzeppelin/security/ReentrancyGuard.sol";
import "../../../openzeppelin/utils/Strings.sol";
import "../../../openzeppelin/utils/introspection/ERC165.sol";
import "../../../openzeppelin/utils/introspection/ERC165Checker.sol";
import "../../../openzeppelin/utils/structs/EnumerableSet.sol";
import "../../../openzeppelin-upgradeable/utils/AddressUpgradeable.sol";

import "../extensions/ICreatorExtensionTokenURI.sol";

import "./ICreatorCore.sol";

/**
 * @dev Core creator implementation
 */
abstract contract CreatorCore is ReentrancyGuard, ICreatorCore, ERC165 {
    using Strings for uint256;
    using EnumerableSet for EnumerableSet.AddressSet;
    using AddressUpgradeable for address;

    /// @custom:oz-upgrades-unsafe-allow state-variable-assignment
    uint256 _tokenCount = 0;

    // Track registered extensions data
    EnumerableSet.AddressSet internal _extensions;
    EnumerableSet.AddressSet internal _blacklistedExtensions;
    mapping(address => address) internal _extensionPermissions;
    mapping(address => bool) internal _extensionApproveTransfers;

    // For tracking which extension a token was minted by
    mapping(uint256 => address) internal _tokensExtension;

    // The baseURI for a given extension
    mapping(address => string) private _extensionBaseURI;
    mapping(address => bool) private _extensionBaseURIIdentical;

    // The prefix for any tokens with a uri configured
    mapping(address => string) private _extensionURIPrefix;

    // Mapping for individual token URIs
    mapping(uint256 => string) internal _tokenURIs;

    // Royalty configurations
    mapping(address => address payable[]) internal _extensionRoyaltyReceivers;
    mapping(address => uint256[]) internal _extensionRoyaltyBPS;
    mapping(uint256 => address payable[]) internal _tokenRoyaltyReceivers;
    mapping(uint256 => uint256[]) internal _tokenRoyaltyBPS;

    /**
     * External interface identifiers for royalties
     */

    /**
     *  @dev CreatorCore
     *
     *  bytes4(keccak256('getRoyalties(uint256)')) == 0xbb3bafd6
     *
     *  => 0xbb3bafd6 = 0xbb3bafd6
     */
    bytes4 private constant _INTERFACE_ID_ROYALTIES_CREATORCORE = 0xbb3bafd6;

    /**
     *  @dev Rarible: RoyaltiesV1
     *
     *  bytes4(keccak256('getFeeRecipients(uint256)')) == 0xb9c4d9fb
     *  bytes4(keccak256('getFeeBps(uint256)')) == 0x0ebd4c7f
     *
     *  => 0xb9c4d9fb ^ 0x0ebd4c7f = 0xb7799584
     */
    bytes4 private constant _INTERFACE_ID_ROYALTIES_RARIBLE = 0xb7799584;

    /**
     *  @dev Foundation
     *
     *  bytes4(keccak256('getFees(uint256)')) == 0xd5a06d4c
     *
     *  => 0xd5a06d4c = 0xd5a06d4c
     */
    bytes4 private constant _INTERFACE_ID_ROYALTIES_FOUNDATION = 0xd5a06d4c;

    /**
     *  @dev EIP-2981
     *
     * bytes4(keccak256("royaltyInfo(uint256,uint256)")) == 0x2a55205a
     *
     * => 0x2a55205a = 0x2a55205a
     */
    bytes4 private constant _INTERFACE_ID_ROYALTIES_EIP2981 = 0x2a55205a;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165, IERC165)
        returns (bool)
    {
        return
            interfaceId == type(ICreatorCore).interfaceId ||
            super.supportsInterface(interfaceId) ||
            interfaceId == _INTERFACE_ID_ROYALTIES_CREATORCORE ||
            interfaceId == _INTERFACE_ID_ROYALTIES_RARIBLE ||
            interfaceId == _INTERFACE_ID_ROYALTIES_FOUNDATION ||
            interfaceId == _INTERFACE_ID_ROYALTIES_EIP2981;
    }

    /**
     * @dev Only allows registered extensions to call the specified function
     */
    modifier extensionRequired() {
        require(
            _extensions.contains(msg.sender),
            "Must be registered extension"
        );
        _;
    }

    /**
     * @dev Only allows non-blacklisted extensions
     */
    modifier nonBlacklistRequired(address extension) {
        require(
            !_blacklistedExtensions.contains(extension),
            "Extension blacklisted"
        );
        _;
    }

    /**
     * @dev See {ICreatorCore-getExtensions}.
     */
    function getExtensions()
        external
        view
        override
        returns (address[] memory extensions)
    {
        extensions = new address[](_extensions.length());
        for (uint256 i = 0; i < _extensions.length(); i++) {
            extensions[i] = _extensions.at(i);
        }
        return extensions;
    }

    /**
     * @dev Register an extension
     */
    function _registerExtension(
        address extension,
        string calldata baseURI,
        bool baseURIIdentical
    ) internal {
        require(extension != address(this), "Creator: Invalid");
        require(
            extension.isContract(),
            "Creator: Extension must be a contract"
        );
        if (!_extensions.contains(extension)) {
            _extensionBaseURI[extension] = baseURI;
            _extensionBaseURIIdentical[extension] = baseURIIdentical;
            emit ExtensionRegistered(extension, msg.sender);
            _extensions.add(extension);
        }
    }

    /**
     * @dev Unregister an extension
     */
    function _unregisterExtension(address extension) internal {
        if (_extensions.contains(extension)) {
            emit ExtensionUnregistered(extension, msg.sender);
            _extensions.remove(extension);
        }
    }

    /**
     * @dev Blacklist an extension
     */
    function _blacklistExtension(address extension) internal {
        require(extension != address(this), "Cannot blacklist yourself");
        if (_extensions.contains(extension)) {
            emit ExtensionUnregistered(extension, msg.sender);
            _extensions.remove(extension);
        }
        if (!_blacklistedExtensions.contains(extension)) {
            emit ExtensionBlacklisted(extension, msg.sender);
            _blacklistedExtensions.add(extension);
        }
    }

    /**
     * @dev Set base token uri for an extension
     */
    function _setBaseTokenURIExtension(string calldata uri, bool identical)
        internal
    {
        _extensionBaseURI[msg.sender] = uri;
        _extensionBaseURIIdentical[msg.sender] = identical;
    }

    /**
     * @dev Set token uri prefix for an extension
     */
    function _setTokenURIPrefixExtension(string calldata prefix) internal {
        _extensionURIPrefix[msg.sender] = prefix;
    }

    /**
     * @dev Set token uri for a token of an extension
     */
    function _setTokenURIExtension(uint256 tokenId, string calldata uri)
        internal
    {
        require(_tokensExtension[tokenId] == msg.sender, "Invalid token");
        _tokenURIs[tokenId] = uri;
    }

    /**
     * @dev Set base token uri for tokens with no extension
     */
    function _setBaseTokenURI(string memory uri) internal {
        _extensionBaseURI[address(this)] = uri;
    }

    /**
     * @dev Set token uri prefix for tokens with no extension
     */
    function _setTokenURIPrefix(string calldata prefix) internal {
        _extensionURIPrefix[address(this)] = prefix;
    }

    /**
     * @dev Set token uri for a token with no extension
     */
    function _setTokenURI(uint256 tokenId, string calldata uri) internal {
        require(_tokensExtension[tokenId] == address(this), "Invalid token");
        _tokenURIs[tokenId] = uri;
    }

    /**
     * @dev Retrieve a token's URI
     */
    function _tokenURI(uint256 tokenId) internal view returns (string memory) {
        address extension = _tokensExtension[tokenId];
        require(
            !_blacklistedExtensions.contains(extension),
            "Extension blacklisted"
        );

        if (bytes(_tokenURIs[tokenId]).length != 0) {
            if (bytes(_extensionURIPrefix[extension]).length != 0) {
                return
                    string(
                        abi.encodePacked(
                            _extensionURIPrefix[extension],
                            _tokenURIs[tokenId]
                        )
                    );
            }
            return _tokenURIs[tokenId];
        }

        if (
            ERC165Checker.supportsInterface(
                extension,
                type(ICreatorExtensionTokenURI).interfaceId
            )
        ) {
            return
                ICreatorExtensionTokenURI(extension).tokenURI(
                    address(this),
                    tokenId
                );
        }
        if (bytes(_extensionBaseURI[extension]).length != 0) {
            if (!_extensionBaseURIIdentical[extension]) {
                return
                    string(
                        abi.encodePacked(
                            _extensionBaseURI[extension],
                            tokenId.toString()
                        )
                    );
            } else {
                return _extensionBaseURI[extension];
            }
        } else {
            if (!_extensionBaseURIIdentical[address(this)])
            {
            return
                string(
                    abi.encodePacked(
                        _extensionBaseURI[address(this)],
                        tokenId.toString()
                    )
                );
            }else{
                return _extensionBaseURI[address(this)];
            }
        }
    }

    /**
     * Get token extension
     */
    function _tokenExtension(uint256 tokenId)
        internal
        view
        returns (address extension)
    {
        extension = _tokensExtension[tokenId];

        require(extension != address(this), "No extension for token");
        require(
            !_blacklistedExtensions.contains(extension),
            "Extension blacklisted"
        );

        return extension;
    }

    /**
     * Helper to get royalties for a token
     */
    function _getRoyalties(uint256 tokenId)
        internal
        view
        returns (address payable[] storage, uint256[] storage)
    {
        return (_getRoyaltyReceivers(tokenId), _getRoyaltyBPS(tokenId));
    }

    /**
     * Helper to get royalty receivers for a token
     */
    function _getRoyaltyReceivers(uint256 tokenId)
        internal
        view
        returns (address payable[] storage)
    {
        if (_tokenRoyaltyReceivers[tokenId].length > 0) {
            return _tokenRoyaltyReceivers[tokenId];
        } else if (
            _extensionRoyaltyReceivers[_tokensExtension[tokenId]].length > 0
        ) {
            return _extensionRoyaltyReceivers[_tokensExtension[tokenId]];
        }
        return _extensionRoyaltyReceivers[address(this)];
    }

    /**
     * Helper to get royalty basis points for a token
     */
    function _getRoyaltyBPS(uint256 tokenId)
        internal
        view
        returns (uint256[] storage)
    {
        if (_tokenRoyaltyBPS[tokenId].length > 0) {
            return _tokenRoyaltyBPS[tokenId];
        } else if (_extensionRoyaltyBPS[_tokensExtension[tokenId]].length > 0) {
            return _extensionRoyaltyBPS[_tokensExtension[tokenId]];
        }
        return _extensionRoyaltyBPS[address(this)];
    }

    function _getRoyaltyInfo(uint256 tokenId, uint256 value)
        internal
        view
        returns (address receiver, uint256 amount)
    {
        address payable[] storage receivers = _getRoyaltyReceivers(tokenId);
        require(receivers.length <= 1, "More than 1 royalty receiver");

        if (receivers.length == 0) {
            return (address(this), 0);
        }
        return (receivers[0], (_getRoyaltyBPS(tokenId)[0] * value) / 10000);
    }

    /**
     * Set royalties for a token
     */
    function _setRoyalties(
        uint256 tokenId,
        address payable[] calldata receivers,
        uint256[] calldata basisPoints
    ) internal {
        require(receivers.length == basisPoints.length, "Invalid input");
        uint256 totalBasisPoints;
        for (uint256 i = 0; i < basisPoints.length; i++) {
            totalBasisPoints += basisPoints[i];
        }
        require(totalBasisPoints < 10000, "Invalid total royalties");
        _tokenRoyaltyReceivers[tokenId] = receivers;
        _tokenRoyaltyBPS[tokenId] = basisPoints;
        emit RoyaltiesUpdated(tokenId, receivers, basisPoints);
    }

    /**
     * Set royalties for all tokens of an extension
     */
    function _setRoyaltiesExtension(
        address extension,
        address payable[] calldata receivers,
        uint256[] calldata basisPoints
    ) internal {
        require(receivers.length == basisPoints.length, "Invalid input");
        uint256 totalBasisPoints;
        for (uint256 i = 0; i < basisPoints.length; i++) {
            totalBasisPoints += basisPoints[i];
        }
        require(totalBasisPoints < 10000, "Invalid total royalties");
        _extensionRoyaltyReceivers[extension] = receivers;
        _extensionRoyaltyBPS[extension] = basisPoints;
        if (extension == address(this)) {
            emit DefaultRoyaltiesUpdated(receivers, basisPoints);
        } else {
            emit ExtensionRoyaltiesUpdated(extension, receivers, basisPoints);
        }
    }
}

// File: contracts/manifold/creator-core/extensions/ICreatorExtensionTokenURI.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

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

/**
 * @dev Implement this if you want your extension to have overloadable URI's
 */
interface ICreatorExtensionTokenURI is IERC165 {
    /**
     * Get the uri for a given creator/tokenId
     */
    function tokenURI(address creator, uint256 tokenId)
        external
        view
        returns (string memory);
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Address.sol)

pragma solidity ^0.8.0;

/**
 * @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
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 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: contracts/openzeppelin/utils/structs/EnumerableSet.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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: contracts/openzeppelin/utils/introspection/ERC165Checker.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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: contracts/openzeppelin/utils/introspection/ERC165.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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: contracts/openzeppelin/security/ReentrancyGuard.sol



// SPDX-License-Identifier: MIT

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;

    /// @custom:oz-upgrades-unsafe-allow constructor
    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 make 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;
    }
}