// File: src/nouns-vision/NounsVisionExchangeMinterModule.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

// import {ERC721DropMinterInterface} from "./ERC721DropMinterInterface.sol";
// import {ERC721OwnerInterface} from "./ERC721OwnerInterface.sol";
import {IERC721Drop} from "zora-drops-contracts/interfaces/IERC721Drop.sol";
import {ERC721Drop} from "zora-drops-contracts/ERC721Drop.sol";
import {IMetadataRenderer} from "zora-drops-contracts/interfaces/IMetadataRenderer.sol";
import {MetadataRenderAdminCheck} from "zora-drops-contracts/metadata/MetadataRenderAdminCheck.sol";
import {SharedNFTLogic} from "zora-drops-contracts/utils/SharedNFTLogic.sol";

/// @notice Exchanges one drop for another through burn mechanism
contract NounsVisionExchangeMinterModule is
    IMetadataRenderer,
    MetadataRenderAdminCheck
{
    struct ColorInfo {
        uint128 claimedCount;
        uint128 maxCount;
        string animationURI;
        string imageURI;
    }

    struct ColorSetting {
        string color;
        uint128 maxCount;
        string animationURI;
        string imageURI;
    }

    event ExchangedTokens(
        address indexed sender,
        uint256 indexed resultChunk,
        uint256 targetLength,
        uint256[] fromIds
    );

    event UpdatedColor(string color, ColorSetting settings);
    event UpdatedDescription(string newDescription);

    ERC721Drop public immutable source;
    ERC721Drop public sink;
    SharedNFTLogic private immutable sharedNFTLogic;

    string description;
    string public contractURI;

    mapping(string => ColorInfo) public colors;
    mapping(uint256 => string) public idToColor;

    constructor(
        IERC721Drop _source,
        SharedNFTLogic _sharedNFTLogic,
        string memory _description
    ) {
        source = ERC721Drop(payable(address(_source)));
        sharedNFTLogic = _sharedNFTLogic;
        description = _description;
    }

    uint128 public maxCount;

    function setDescription(string memory newDescription)
        public
        requireSenderAdmin(address(source))
    {
        description = newDescription;
        emit UpdatedDescription(newDescription);
    }

    function setContractURI(string memory newContractURI)
        public
        requireSenderAdmin(address(source))
    {
        contractURI = newContractURI;
    }

    // This is called along with the create callcode in the deployer contract as one
    // function call allowing the init to be a public function since it's within one transaction.
    function initializeWithData(bytes memory) external {
        require(address(sink) == address(0x0), "Can only be initialized once");
        sink = ERC721Drop(payable(msg.sender));
    }

    function setColorLimits(ColorSetting[] calldata colorSettings)
        external
        requireSenderAdmin(address(sink))
    {
        uint128 maxCountCache = maxCount;
        for (uint256 i = 0; i < colorSettings.length; ) {
            string memory color = colorSettings[i].color;
            require(
                colors[color].claimedCount <= colorSettings[i].maxCount,
                "Cannot decrease beyond claimed"
            );
            maxCountCache -= colors[color].maxCount;
            maxCountCache += colorSettings[i].maxCount;
            colors[color].maxCount = colorSettings[i].maxCount;
            colors[color].animationURI = colorSettings[i].animationURI;
            colors[color].imageURI = colorSettings[i].imageURI;

            emit UpdatedColor(color, colorSettings[i]);

            unchecked {
                ++i;
            }
        }
        maxCount = maxCountCache;
    }

    function exchange(uint256[] calldata fromIds, string memory color)
        external
    {
        require(
            source.isApprovedForAll(msg.sender, address(this)),
            "Exchange module is not approved to manage tokens"
        );
        uint128 targetLength = uint128(fromIds.length);
        require(
            colors[color].claimedCount + targetLength <= colors[color].maxCount,
            "Ran out of color"
        );
        colors[color].claimedCount += targetLength;

        uint256 resultChunk = sink.adminMint(msg.sender, targetLength);
        for (uint256 i = 0; i < targetLength; ) {
            // If the user (account) is able to burn then they also are able to exchange.
            // If they are not allowed, the burn call will fail.
            source.burn(fromIds[i]);
            unchecked {
                idToColor[resultChunk - i] = color;
                ++i;
            }
        }

        emit ExchangedTokens({
            sender: msg.sender,
            resultChunk: resultChunk,
            targetLength: targetLength,
            fromIds: fromIds
        });
    }

    function tokenURI(uint256 tokenId) external view returns (string memory) {
        string memory color = idToColor[tokenId];
        ColorInfo storage colorInfo = colors[color];

        return
            sharedNFTLogic.createMetadataEdition({
                name: string(abi.encodePacked(sink.name(), " ", color)),
                description: description,
                imageUrl: colorInfo.imageURI,
                animationUrl: colorInfo.animationURI,
                tokenOfEdition: tokenId,
                editionSize: maxCount
            });
    }
}

// File: lib/zora-drops-contracts/src/interfaces/IERC721Drop.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

import {IMetadataRenderer} from "../interfaces/IMetadataRenderer.sol";

/**

 ________   _____   ____    ______      ____
/\_____  \ /\  __`\/\  _`\ /\  _  \    /\  _`\
\/____//'/'\ \ \/\ \ \ \L\ \ \ \L\ \   \ \ \/\ \  _ __   ___   _____     ____
     //'/'  \ \ \ \ \ \ ,  /\ \  __ \   \ \ \ \ \/\`'__\/ __`\/\ '__`\  /',__\
    //'/'___ \ \ \_\ \ \ \\ \\ \ \/\ \   \ \ \_\ \ \ \//\ \L\ \ \ \L\ \/\__, `\
    /\_______\\ \_____\ \_\ \_\ \_\ \_\   \ \____/\ \_\\ \____/\ \ ,__/\/\____/
    \/_______/ \/_____/\/_/\/ /\/_/\/_/    \/___/  \/_/ \/___/  \ \ \/  \/___/
                                                                 \ \_\
                                                                  \/_/

*/

/// @notice Interface for ZORA Drops contract
interface IERC721Drop {
    // Access errors

    /// @notice Only admin can access this function
    error Access_OnlyAdmin();
    /// @notice Missing the given role or admin access
    error Access_MissingRoleOrAdmin(bytes32 role);
    /// @notice Withdraw is not allowed by this user
    error Access_WithdrawNotAllowed();
    /// @notice Cannot withdraw funds due to ETH send failure.
    error Withdraw_FundsSendFailure();

    // Sale/Purchase errors
    /// @notice Sale is inactive
    error Sale_Inactive();
    /// @notice Presale is inactive
    error Presale_Inactive();
    /// @notice Presale merkle root is invalid
    error Presale_MerkleNotApproved();
    /// @notice Wrong price for purchase
    error Purchase_WrongPrice(uint256 correctPrice);
    /// @notice NFT sold out
    error Mint_SoldOut();
    /// @notice Too many purchase for address
    error Purchase_TooManyForAddress();
    /// @notice Too many presale for address
    error Presale_TooManyForAddress();

    // Admin errors
    /// @notice Royalty percentage too high
    error Setup_RoyaltyPercentageTooHigh(uint16 maxRoyaltyBPS);
    /// @notice Invalid admin upgrade address
    error Admin_InvalidUpgradeAddress(address proposedAddress);
    /// @notice Unable to finalize an edition not marked as open (size set to uint64_max_value)
    error Admin_UnableToFinalizeNotOpenEdition();

    /// @notice Event emitted for each sale
    /// @param to address sale was made to
    /// @param quantity quantity of the minted nfts
    /// @param pricePerToken price for each token
    /// @param firstPurchasedTokenId first purchased token ID (to get range add to quantity for max)
    event Sale(
        address indexed to,
        uint256 indexed quantity,
        uint256 indexed pricePerToken,
        uint256 firstPurchasedTokenId
    );

    /// @notice General configuration for NFT Minting and bookkeeping
    struct Configuration {
        /// @dev Metadata renderer (uint160)
        IMetadataRenderer metadataRenderer;
        /// @dev Total size of edition that can be minted (uint160+64 = 224)
        uint64 editionSize;
        /// @dev Royalty amount in bps (uint224+16 = 240)
        uint16 royaltyBPS;
        /// @dev Funds recipient for sale (new slot, uint160)
        address payable fundsRecipient;
    }

    /// @notice Sales states and configuration
    /// @dev Uses 3 storage slots
    struct SalesConfiguration {
        /// @dev Public sale price (max ether value > 1000 ether with this value)
        uint104 publicSalePrice;
        /// @notice Purchase mint limit per address (if set to 0 === unlimited mints)
        /// @dev Max purchase number per txn (90+32 = 122)
        uint32 maxSalePurchasePerAddress;
        /// @dev uint64 type allows for dates into 292 billion years
        /// @notice Public sale start timestamp (136+64 = 186)
        uint64 publicSaleStart;
        /// @notice Public sale end timestamp (186+64 = 250)
        uint64 publicSaleEnd;
        /// @notice Presale start timestamp
        /// @dev new storage slot
        uint64 presaleStart;
        /// @notice Presale end timestamp
        uint64 presaleEnd;
        /// @notice Presale merkle root
        bytes32 presaleMerkleRoot;
    }

    /// @notice Return value for sales details to use with front-ends
    struct SaleDetails {
        // Synthesized status variables for sale and presale
        bool publicSaleActive;
        bool presaleActive;
        // Price for public sale
        uint256 publicSalePrice;
        // Timed sale actions for public sale
        uint64 publicSaleStart;
        uint64 publicSaleEnd;
        // Timed sale actions for presale
        uint64 presaleStart;
        uint64 presaleEnd;
        // Merkle root (includes address, quantity, and price data for each entry)
        bytes32 presaleMerkleRoot;
        // Limit public sale to a specific number of mints per wallet
        uint256 maxSalePurchasePerAddress;
        // Information about the rest of the supply
        // Total that have been minted
        uint256 totalMinted;
        // The total supply available
        uint256 maxSupply;
    }

    /// @notice Return type of specific mint counts and details per address
    struct AddressMintDetails {
        /// Number of total mints from the given address
        uint256 totalMints;
        /// Number of presale mints from the given address
        uint256 presaleMints;
        /// Number of public mints from the given address
        uint256 publicMints;
    }

    /// @notice External purchase function (payable in eth)
    /// @param quantity to purchase
    /// @return first minted token ID
    function purchase(uint256 quantity) external payable returns (uint256);

    /// @notice External purchase presale function (takes a merkle proof and matches to root) (payable in eth)
    /// @param quantity to purchase
    /// @param maxQuantity can purchase (verified by merkle root)
    /// @param pricePerToken price per token allowed (verified by merkle root)
    /// @param merkleProof input for merkle proof leaf verified by merkle root
    /// @return first minted token ID
    function purchasePresale(
        uint256 quantity,
        uint256 maxQuantity,
        uint256 pricePerToken,
        bytes32[] memory merkleProof
    ) external payable returns (uint256);

    /// @notice Function to return the global sales details for the given drop
    function saleDetails() external view returns (SaleDetails memory);

    /// @notice Function to return the specific sales details for a given address
    /// @param minter address for minter to return mint information for
    function mintedPerAddress(address minter)
        external
        view
        returns (AddressMintDetails memory);

    /// @notice This is the opensea/public owner setting that can be set by the contract admin
    function owner() external view returns (address);

    /// @notice This is an admin mint function to mint a quantity to a specific address
    /// @param to address to mint to
    /// @param quantity quantity to mint
    /// @return the id of the first minted NFT
    function adminMint(address to, uint256 quantity) external returns (uint256);

    /// @notice This is an admin mint function to mint a single nft each to a list of addresses
    /// @param to list of addresses to mint an NFT each to
    /// @return the id of the first minted NFT
    function adminMintAirdrop(address[] memory to) external returns (uint256);

    /// @dev Getter for admin role associated with the contract to handle metadata
    /// @return boolean if address is admin
    function isAdmin(address user) external view returns (bool);
}

// File: lib/zora-drops-contracts/src/ERC721Drop.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

/**

 ________   _____   ____    ______      ____
/\_____  \ /\  __`\/\  _`\ /\  _  \    /\  _`\
\/____//'/'\ \ \/\ \ \ \L\ \ \ \L\ \   \ \ \/\ \  _ __   ___   _____     ____
     //'/'  \ \ \ \ \ \ ,  /\ \  __ \   \ \ \ \ \/\`'__\/ __`\/\ '__`\  /',__\
    //'/'___ \ \ \_\ \ \ \\ \\ \ \/\ \   \ \ \_\ \ \ \//\ \L\ \ \ \L\ \/\__, `\
    /\_______\\ \_____\ \_\ \_\ \_\ \_\   \ \____/\ \_\\ \____/\ \ ,__/\/\____/
    \/_______/ \/_____/\/_/\/ /\/_/\/_/    \/___/  \/_/ \/___/  \ \ \/  \/___/
                                                                 \ \_\
                                                                  \/_/

 */

import {ERC721AUpgradeable} from "erc721a-upgradeable/ERC721AUpgradeable.sol";
import {IERC721AUpgradeable} from "erc721a-upgradeable/IERC721AUpgradeable.sol";
import {IERC2981Upgradeable, IERC165Upgradeable} from "@openzeppelin/contracts-upgradeable/interfaces/IERC2981Upgradeable.sol";
import {AccessControlUpgradeable} from "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
import {ReentrancyGuardUpgradeable} from "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import {MerkleProofUpgradeable} from "@openzeppelin/contracts-upgradeable/utils/cryptography/MerkleProofUpgradeable.sol";
import {UUPSUpgradeable} from "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";

import {IZoraFeeManager} from "./interfaces/IZoraFeeManager.sol";
import {IMetadataRenderer} from "./interfaces/IMetadataRenderer.sol";
import {IERC721Drop} from "./interfaces/IERC721Drop.sol";
import {IOwnable} from "./interfaces/IOwnable.sol";

import {OwnableSkeleton} from "./utils/OwnableSkeleton.sol";
import {FundsReceiver} from "./utils/FundsReceiver.sol";
import {Version} from "./utils/Version.sol";
import {FactoryUpgradeGate} from "./FactoryUpgradeGate.sol";
import {ERC721DropStorageV1} from "./storage/ERC721DropStorageV1.sol";

/**
 * @notice ZORA NFT Base contract for Drops and Editions
 *
 * @dev For drops: assumes 1. linear mint order, 2. max number of mints needs to be less than max_uint64
 *       (if you have more than 18 quintillion linear mints you should probably not be using this contract)
 * @author iain@zora.co
 *
 */
contract ERC721Drop is
    ERC721AUpgradeable,
    UUPSUpgradeable,
    IERC2981Upgradeable,
    ReentrancyGuardUpgradeable,
    AccessControlUpgradeable,
    IERC721Drop,
    OwnableSkeleton,
    FundsReceiver,
    Version(7),
    ERC721DropStorageV1
{
    /// @dev This is the max mint batch size for the optimized ERC721A mint contract
    uint256 internal constant MAX_MINT_BATCH_SIZE = 8;

    /// @dev Gas limit to send funds
    uint256 internal constant FUNDS_SEND_GAS_LIMIT = 210_000;

    /// @notice Access control roles
    bytes32 public immutable MINTER_ROLE = keccak256("MINTER");
    bytes32 public immutable SALES_MANAGER_ROLE = keccak256("SALES_MANAGER");

    /// @dev ZORA V3 transfer helper address for auto-approval
    address internal immutable zoraERC721TransferHelper;

    /// @dev Factory upgrade gate
    FactoryUpgradeGate internal immutable factoryUpgradeGate;

    /// @dev Zora Fee Manager address
    IZoraFeeManager public immutable zoraFeeManager;

    /// @notice Max royalty BPS
    uint16 constant MAX_ROYALTY_BPS = 50_00;

    event SalesConfigChanged(address indexed changedBy);

    event FundsRecipientChanged(
        address indexed newAddress,
        address indexed changedBy
    );

    event OpenMintFinalized(address indexed sender, uint256 numberOfMints);

    /// @notice Only allow for users with admin access
    modifier onlyAdmin() {
        if (!hasRole(DEFAULT_ADMIN_ROLE, msg.sender)) {
            revert Access_OnlyAdmin();
        }

        _;
    }

    /// @notice Only a given role has access or admin
    /// @param role role to check for alongside the admin role
    modifier onlyRoleOrAdmin(bytes32 role) {
        if (
            !hasRole(DEFAULT_ADMIN_ROLE, msg.sender) &&
            !hasRole(role, msg.sender)
        ) {
            revert Access_MissingRoleOrAdmin(role);
        }

        _;
    }

    /// @notice Allows user to mint tokens at a quantity
    modifier canMintTokens(uint256 quantity) {
        if (quantity + _totalMinted() > config.editionSize) {
            revert Mint_SoldOut();
        }

        _;
    }

    function _presaleActive() internal view returns (bool) {
        return
            salesConfig.presaleStart <= block.timestamp &&
            salesConfig.presaleEnd > block.timestamp;
    }

    function _publicSaleActive() internal view returns (bool) {
        return
            salesConfig.publicSaleStart <= block.timestamp &&
            salesConfig.publicSaleEnd > block.timestamp;
    }

    /// @notice Presale active
    modifier onlyPresaleActive() {
        if (!_presaleActive()) {
            revert Presale_Inactive();
        }

        _;
    }

    /// @notice Public sale active
    modifier onlyPublicSaleActive() {
        if (!_publicSaleActive()) {
            revert Sale_Inactive();
        }

        _;
    }

    /// @notice Getter for last minted token ID (gets next token id and subtracts 1)
    function _lastMintedTokenId() internal view returns (uint256) {
        return _currentIndex - 1;
    }

    /// @notice Start token ID for minting (1-100 vs 0-99)
    function _startTokenId() internal pure override returns (uint256) {
        return 1;
    }

    /// @notice Global constructor – these variables will not change with further proxy deploys
    /// @dev Marked as an initializer to prevent storage being used of base implementation. Can only be init'd by a proxy.
    /// @param _zoraFeeManager Zora Fee Manager
    /// @param _zoraERC721TransferHelper Transfer helper
    constructor(
        IZoraFeeManager _zoraFeeManager,
        address _zoraERC721TransferHelper,
        FactoryUpgradeGate _factoryUpgradeGate
    ) initializer {
        zoraFeeManager = _zoraFeeManager;
        zoraERC721TransferHelper = _zoraERC721TransferHelper;
        factoryUpgradeGate = _factoryUpgradeGate;
    }

    ///  @dev Create a new drop contract
    ///  @param _contractName Contract name
    ///  @param _contractSymbol Contract symbol
    ///  @param _initialOwner User that owns and can mint the edition, gets royalty and sales payouts and can update the base url if needed.
    ///  @param _fundsRecipient Wallet/user that receives funds from sale
    ///  @param _editionSize Number of editions that can be minted in total. If 0, unlimited editions can be minted.
    ///  @param _royaltyBPS BPS of the royalty set on the contract. Can be 0 for no royalty.
    ///  @param _salesConfig New sales config to set upon init
    ///  @param _metadataRenderer Renderer contract to use
    ///  @param _metadataRendererInit Renderer data initial contract
    function initialize(
        string memory _contractName,
        string memory _contractSymbol,
        address _initialOwner,
        address payable _fundsRecipient,
        uint64 _editionSize,
        uint16 _royaltyBPS,
        SalesConfiguration memory _salesConfig,
        IMetadataRenderer _metadataRenderer,
        bytes memory _metadataRendererInit
    ) public initializer {
        // Setup ERC721A
        __ERC721A_init(_contractName, _contractSymbol);
        // Setup access control
        __AccessControl_init();
        // Setup re-entracy guard
        __ReentrancyGuard_init();
        // Setup the owner role
        _setupRole(DEFAULT_ADMIN_ROLE, _initialOwner);
        // Set ownership to original sender of contract call
        _setOwner(_initialOwner);

        if (config.royaltyBPS > MAX_ROYALTY_BPS) {
            revert Setup_RoyaltyPercentageTooHigh(MAX_ROYALTY_BPS);
        }

        // Update salesConfig
        salesConfig = _salesConfig;

        // Setup config variables
        config.editionSize = _editionSize;
        config.metadataRenderer = _metadataRenderer;
        config.royaltyBPS = _royaltyBPS;
        config.fundsRecipient = _fundsRecipient;
        _metadataRenderer.initializeWithData(_metadataRendererInit);
    }

    /// @dev Getter for admin role associated with the contract to handle metadata
    /// @return boolean if address is admin
    function isAdmin(address user) external view returns (bool) {
        return hasRole(DEFAULT_ADMIN_ROLE, user);
    }

    /// @notice Connects this contract to the factory upgrade gate
    /// @param newImplementation proposed new upgrade implementation
    /// @dev Only can be called by admin
    function _authorizeUpgrade(address newImplementation)
        internal
        override
        onlyAdmin
    {
        if (
            !factoryUpgradeGate.isValidUpgradePath({
                _newImpl: newImplementation,
                _currentImpl: _getImplementation()
            })
        ) {
            revert Admin_InvalidUpgradeAddress(newImplementation);
        }
    }

    //        ,-.
    //        `-'
    //        /|\
    //         |             ,----------.
    //        / \            |ERC721Drop|
    //      Caller           `----+-----'
    //        |       burn()      |
    //        | ------------------>
    //        |                   |
    //        |                   |----.
    //        |                   |    | burn token
    //        |                   |<---'
    //      Caller           ,----+-----.
    //        ,-.            |ERC721Drop|
    //        `-'            `----------'
    //        /|\
    //         |
    //        / \
    /// @param tokenId Token ID to burn
    /// @notice User burn function for token id
    function burn(uint256 tokenId) public {
        _burn(tokenId, true);
    }

    /// @dev Get royalty information for token
    /// @param _salePrice Sale price for the token
    function royaltyInfo(uint256, uint256 _salePrice)
        external
        view
        override
        returns (address receiver, uint256 royaltyAmount)
    {
        if (config.fundsRecipient == address(0)) {
            return (config.fundsRecipient, 0);
        }
        return (
            config.fundsRecipient,
            (_salePrice * config.royaltyBPS) / 10_000
        );
    }

    /// @notice Sale details
    /// @return IERC721Drop.SaleDetails sale information details
    function saleDetails()
        external
        view
        returns (IERC721Drop.SaleDetails memory)
    {
        return
            IERC721Drop.SaleDetails({
                publicSaleActive: _publicSaleActive(),
                presaleActive: _presaleActive(),
                publicSalePrice: salesConfig.publicSalePrice,
                publicSaleStart: salesConfig.publicSaleStart,
                publicSaleEnd: salesConfig.publicSaleEnd,
                presaleStart: salesConfig.presaleStart,
                presaleEnd: salesConfig.presaleEnd,
                presaleMerkleRoot: salesConfig.presaleMerkleRoot,
                totalMinted: _totalMinted(),
                maxSupply: config.editionSize,
                maxSalePurchasePerAddress: salesConfig.maxSalePurchasePerAddress
            });
    }

    /// @dev Number of NFTs the user has minted per address
    /// @param minter to get counts for
    function mintedPerAddress(address minter)
        external
        view
        override
        returns (IERC721Drop.AddressMintDetails memory)
    {
        return
            IERC721Drop.AddressMintDetails({
                presaleMints: presaleMintsByAddress[minter],
                publicMints: _numberMinted(minter) -
                    presaleMintsByAddress[minter],
                totalMints: _numberMinted(minter)
            });
    }

    /// @dev Setup auto-approval for Zora v3 access to sell NFT
    ///      Still requires approval for module
    /// @param nftOwner owner of the nft
    /// @param operator operator wishing to transfer/burn/etc the NFTs
    function isApprovedForAll(address nftOwner, address operator)
        public
        view
        override(ERC721AUpgradeable)
        returns (bool)
    {
        if (operator == zoraERC721TransferHelper) {
            return true;
        }
        return super.isApprovedForAll(nftOwner, operator);
    }

    /// @dev Gets the zora fee for amount of withdraw
    /// @param amount amount of funds to get fee for
    function zoraFeeForAmount(uint256 amount)
        public
        returns (address payable, uint256)
    {
        (address payable recipient, uint256 bps) = zoraFeeManager
            .getZORAWithdrawFeesBPS(address(this));
        return (recipient, (amount * bps) / 10_000);
    }

    /**
     *** ---------------------------------- ***
     ***                                    ***
     ***     PUBLIC MINTING FUNCTIONS       ***
     ***                                    ***
     *** ---------------------------------- ***
     ***/

    //                       ,-.
    //                       `-'
    //                       /|\
    //                        |                       ,----------.
    //                       / \                      |ERC721Drop|
    //                     Caller                     `----+-----'
    //                       |          purchase()         |
    //                       | ---------------------------->
    //                       |                             |
    //                       |                             |
    //          ___________________________________________________________
    //          ! ALT  /  drop has no tokens left for caller to mint?      !
    //          !_____/      |                             |               !
    //          !            |    revert Mint_SoldOut()    |               !
    //          !            | <----------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                             |
    //                       |                             |
    //          ___________________________________________________________
    //          ! ALT  /  public sale isn't active?        |               !
    //          !_____/      |                             |               !
    //          !            |    revert Sale_Inactive()   |               !
    //          !            | <----------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                             |
    //                       |                             |
    //          ___________________________________________________________
    //          ! ALT  /  inadequate funds sent?           |               !
    //          !_____/      |                             |               !
    //          !            | revert Purchase_WrongPrice()|               !
    //          !            | <----------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                             |
    //                       |                             |----.
    //                       |                             |    | mint tokens
    //                       |                             |<---'
    //                       |                             |
    //                       |                             |----.
    //                       |                             |    | emit IERC721Drop.Sale()
    //                       |                             |<---'
    //                       |                             |
    //                       | return first minted token ID|
    //                       | <----------------------------
    //                     Caller                     ,----+-----.
    //                       ,-.                      |ERC721Drop|
    //                       `-'                      `----------'
    //                       /|\
    //                        |
    //                       / \
    /**
      @dev This allows the user to purchase a edition edition
           at the given price in the contract.
     */
    function purchase(uint256 quantity)
        external
        payable
        nonReentrant
        canMintTokens(quantity)
        onlyPublicSaleActive
        returns (uint256)
    {
        uint256 salePrice = salesConfig.publicSalePrice;

        if (msg.value != salePrice * quantity) {
            revert Purchase_WrongPrice(salePrice * quantity);
        }

        // If max purchase per address == 0 there is no limit.
        // Any other number, the per address mint limit is that.
        if (
            salesConfig.maxSalePurchasePerAddress != 0 &&
            _numberMinted(_msgSender()) +
                quantity -
                presaleMintsByAddress[_msgSender()] >
            salesConfig.maxSalePurchasePerAddress
        ) {
            revert Purchase_TooManyForAddress();
        }

        _mintNFTs(_msgSender(), quantity);
        uint256 firstMintedTokenId = _lastMintedTokenId() - quantity;

        emit IERC721Drop.Sale({
            to: _msgSender(),
            quantity: quantity,
            pricePerToken: salePrice,
            firstPurchasedTokenId: firstMintedTokenId
        });
        return firstMintedTokenId;
    }

    /// @notice Function to mint NFTs
    /// @dev (important: Does not enforce max supply limit, enforce that limit earlier)
    /// @dev This batches in size of 8 as per recommended by ERC721A creators
    /// @param to address to mint NFTs to
    /// @param quantity number of NFTs to mint
    function _mintNFTs(address to, uint256 quantity) internal {
        do {
            uint256 toMint = quantity > MAX_MINT_BATCH_SIZE
                ? MAX_MINT_BATCH_SIZE
                : quantity;
            _mint({to: to, quantity: toMint});
            quantity -= toMint;
        } while (quantity > 0);
    }

    //                       ,-.
    //                       `-'
    //                       /|\
    //                        |                             ,----------.
    //                       / \                            |ERC721Drop|
    //                     Caller                           `----+-----'
    //                       |         purchasePresale()         |
    //                       | ---------------------------------->
    //                       |                                   |
    //                       |                                   |
    //          _________________________________________________________________
    //          ! ALT  /  drop has no tokens left for caller to mint?            !
    //          !_____/      |                                   |               !
    //          !            |       revert Mint_SoldOut()       |               !
    //          !            | <----------------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                                   |
    //                       |                                   |
    //          _________________________________________________________________
    //          ! ALT  /  presale sale isn't active?             |               !
    //          !_____/      |                                   |               !
    //          !            |     revert Presale_Inactive()     |               !
    //          !            | <----------------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                                   |
    //                       |                                   |
    //          _________________________________________________________________
    //          ! ALT  /  merkle proof unapproved for caller?    |               !
    //          !_____/      |                                   |               !
    //          !            | revert Presale_MerkleNotApproved()|               !
    //          !            | <----------------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                                   |
    //                       |                                   |
    //          _________________________________________________________________
    //          ! ALT  /  inadequate funds sent?                 |               !
    //          !_____/      |                                   |               !
    //          !            |    revert Purchase_WrongPrice()   |               !
    //          !            | <----------------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                                   |
    //                       |                                   |----.
    //                       |                                   |    | mint tokens
    //                       |                                   |<---'
    //                       |                                   |
    //                       |                                   |----.
    //                       |                                   |    | emit IERC721Drop.Sale()
    //                       |                                   |<---'
    //                       |                                   |
    //                       |    return first minted token ID   |
    //                       | <----------------------------------
    //                     Caller                           ,----+-----.
    //                       ,-.                            |ERC721Drop|
    //                       `-'                            `----------'
    //                       /|\
    //                        |
    //                       / \
    /// @notice Merkle-tree based presale purchase function
    /// @param quantity quantity to purchase
    /// @param maxQuantity max quantity that can be purchased via merkle proof #
    /// @param pricePerToken price that each token is purchased at
    /// @param merkleProof proof for presale mint
    function purchasePresale(
        uint256 quantity,
        uint256 maxQuantity,
        uint256 pricePerToken,
        bytes32[] calldata merkleProof
    )
        external
        payable
        nonReentrant
        canMintTokens(quantity)
        onlyPresaleActive
        returns (uint256)
    {
        if (
            !MerkleProofUpgradeable.verify(
                merkleProof,
                salesConfig.presaleMerkleRoot,
                keccak256(
                    // address, uint256, uint256
                    abi.encode(msg.sender, maxQuantity, pricePerToken)
                )
            )
        ) {
            revert Presale_MerkleNotApproved();
        }

        if (msg.value != pricePerToken * quantity) {
            revert Purchase_WrongPrice(pricePerToken * quantity);
        }

        presaleMintsByAddress[_msgSender()] += quantity;
        if (presaleMintsByAddress[_msgSender()] > maxQuantity) {
            revert Presale_TooManyForAddress();
        }

        _mintNFTs(_msgSender(), quantity);
        uint256 firstMintedTokenId = _lastMintedTokenId() - quantity;

        emit IERC721Drop.Sale({
            to: _msgSender(),
            quantity: quantity,
            pricePerToken: pricePerToken,
            firstPurchasedTokenId: firstMintedTokenId
        });

        return firstMintedTokenId;
    }

    /**
     *** ---------------------------------- ***
     ***                                    ***
     ***     ADMIN MINTING FUNCTIONS        ***
     ***                                    ***
     *** ---------------------------------- ***
     ***/

    //                       ,-.
    //                       `-'
    //                       /|\
    //                        |                             ,----------.
    //                       / \                            |ERC721Drop|
    //                     Caller                           `----+-----'
    //                       |            adminMint()            |
    //                       | ---------------------------------->
    //                       |                                   |
    //                       |                                   |
    //          _________________________________________________________________
    //          ! ALT  /  caller is not admin or minter role?    |               !
    //          !_____/      |                                   |               !
    //          !            | revert Access_MissingRoleOrAdmin()|               !
    //          !            | <----------------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                                   |
    //                       |                                   |
    //          _________________________________________________________________
    //          ! ALT  /  drop has no tokens left for caller to mint?            !
    //          !_____/      |                                   |               !
    //          !            |       revert Mint_SoldOut()       |               !
    //          !            | <----------------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                                   |
    //                       |                                   |----.
    //                       |                                   |    | mint tokens
    //                       |                                   |<---'
    //                       |                                   |
    //                       |    return last minted token ID    |
    //                       | <----------------------------------
    //                     Caller                           ,----+-----.
    //                       ,-.                            |ERC721Drop|
    //                       `-'                            `----------'
    //                       /|\
    //                        |
    //                       / \
    /// @notice Mint admin
    /// @param recipient recipient to mint to
    /// @param quantity quantity to mint
    function adminMint(address recipient, uint256 quantity)
        external
        onlyRoleOrAdmin(MINTER_ROLE)
        canMintTokens(quantity)
        returns (uint256)
    {
        _mintNFTs(recipient, quantity);

        return _lastMintedTokenId();
    }

    //                       ,-.
    //                       `-'
    //                       /|\
    //                        |                             ,----------.
    //                       / \                            |ERC721Drop|
    //                     Caller                           `----+-----'
    //                       |         adminMintAirdrop()        |
    //                       | ---------------------------------->
    //                       |                                   |
    //                       |                                   |
    //          _________________________________________________________________
    //          ! ALT  /  caller is not admin or minter role?    |               !
    //          !_____/      |                                   |               !
    //          !            | revert Access_MissingRoleOrAdmin()|               !
    //          !            | <----------------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                                   |
    //                       |                                   |
    //          _________________________________________________________________
    //          ! ALT  /  drop has no tokens left for recipients to mint?        !
    //          !_____/      |                                   |               !
    //          !            |       revert Mint_SoldOut()       |               !
    //          !            | <----------------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                                   |
    //                       |                                   |
    //                       |                    _____________________________________
    //                       |                    ! LOOP  /  for all recipients        !
    //                       |                    !______/       |                     !
    //                       |                    !              |----.                !
    //                       |                    !              |    | mint tokens    !
    //                       |                    !              |<---'                !
    //                       |                    !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                                   |
    //                       |    return last minted token ID    |
    //                       | <----------------------------------
    //                     Caller                           ,----+-----.
    //                       ,-.                            |ERC721Drop|
    //                       `-'                            `----------'
    //                       /|\
    //                        |
    //                       / \
    /// @dev This mints multiple editions to the given list of addresses.
    /// @param recipients list of addresses to send the newly minted editions to
    function adminMintAirdrop(address[] calldata recipients)
        external
        override
        onlyRoleOrAdmin(MINTER_ROLE)
        canMintTokens(recipients.length)
        returns (uint256)
    {
        uint256 atId = _currentIndex;
        uint256 startAt = atId;

        unchecked {
            for (
                uint256 endAt = atId + recipients.length;
                atId < endAt;
                atId++
            ) {
                _mintNFTs(recipients[atId - startAt], 1);
            }
        }
        return _lastMintedTokenId();
    }

    /**
     *** ---------------------------------- ***
     ***                                    ***
     ***  ADMIN CONFIGURATION FUNCTIONS     ***
     ***                                    ***
     *** ---------------------------------- ***
     ***/

    //                       ,-.
    //                       `-'
    //                       /|\
    //                        |                    ,----------.
    //                       / \                   |ERC721Drop|
    //                     Caller                  `----+-----'
    //                       |        setOwner()        |
    //                       | ------------------------->
    //                       |                          |
    //                       |                          |
    //          ________________________________________________________
    //          ! ALT  /  caller is not admin?          |               !
    //          !_____/      |                          |               !
    //          !            | revert Access_OnlyAdmin()|               !
    //          !            | <-------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                          |
    //                       |                          |----.
    //                       |                          |    | set owner
    //                       |                          |<---'
    //                     Caller                  ,----+-----.
    //                       ,-.                   |ERC721Drop|
    //                       `-'                   `----------'
    //                       /|\
    //                        |
    //                       / \
    /// @dev Set new owner for royalties / opensea
    /// @param newOwner new owner to set
    function setOwner(address newOwner) public onlyAdmin {
        _setOwner(newOwner);
    }

    //                       ,-.
    //                       `-'
    //                       /|\
    //                        |                             ,----------.
    //                       / \                            |ERC721Drop|
    //                     Caller                           `----+-----'
    //                       |      setSalesConfiguration()      |
    //                       | ---------------------------------->
    //                       |                                   |
    //                       |                                   |
    //          _________________________________________________________________
    //          ! ALT  /  caller is not admin?                   |               !
    //          !_____/      |                                   |               !
    //          !            | revert Access_MissingRoleOrAdmin()|               !
    //          !            | <----------------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                                   |
    //                       |                                   |----.
    //                       |                                   |    | set funds recipient
    //                       |                                   |<---'
    //                       |                                   |
    //                       |                                   |----.
    //                       |                                   |    | emit FundsRecipientChanged()
    //                       |                                   |<---'
    //                     Caller                           ,----+-----.
    //                       ,-.                            |ERC721Drop|
    //                       `-'                            `----------'
    //                       /|\
    //                        |
    //                       / \
    /// @dev This sets the sales configuration
    // / @param publicSalePrice New public sale price
    function setSaleConfiguration(
        uint104 publicSalePrice,
        uint32 maxSalePurchasePerAddress,
        uint64 publicSaleStart,
        uint64 publicSaleEnd,
        uint64 presaleStart,
        uint64 presaleEnd,
        bytes32 presaleMerkleRoot
    ) external onlyAdmin {
        // SalesConfiguration storage newConfig = SalesConfiguration({
        //     publicSaleStart: publicSaleStart,
        //     publicSaleEnd: publicSaleEnd,
        //     presaleStart: presaleStart,
        //     presaleEnd: presaleEnd,
        //     publicSalePrice: publicSalePrice,
        //     maxSalePurchasePerAddress: maxSalePurchasePerAddress,
        //     presaleMerkleRoot: presaleMerkleRoot
        // });
        salesConfig.publicSalePrice = publicSalePrice;
        salesConfig.maxSalePurchasePerAddress = maxSalePurchasePerAddress;
        salesConfig.publicSaleStart = publicSaleStart;
        salesConfig.publicSaleEnd = publicSaleEnd;
        salesConfig.presaleStart = presaleStart;
        salesConfig.presaleEnd = presaleEnd;
        salesConfig.presaleMerkleRoot = presaleMerkleRoot;

        emit SalesConfigChanged(_msgSender());
    }

    //                       ,-.
    //                       `-'
    //                       /|\
    //                        |                    ,----------.
    //                       / \                   |ERC721Drop|
    //                     Caller                  `----+-----'
    //                       |        setOwner()        |
    //                       | ------------------------->
    //                       |                          |
    //                       |                          |
    //          ________________________________________________________
    //          ! ALT  /  caller is not admin or SALES_MANAGER_ROLE?    !
    //          !_____/      |                          |               !
    //          !            | revert Access_OnlyAdmin()|               !
    //          !            | <-------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                          |
    //                       |                          |----.
    //                       |                          |    | set sales configuration
    //                       |                          |<---'
    //                       |                          |
    //                       |                          |----.
    //                       |                          |    | emit SalesConfigChanged()
    //                       |                          |<---'
    //                     Caller                  ,----+-----.
    //                       ,-.                   |ERC721Drop|
    //                       `-'                   `----------'
    //                       /|\
    //                        |
    //                       / \
    /// @notice Set a different funds recipient
    /// @param newRecipientAddress new funds recipient address
    function setFundsRecipient(address payable newRecipientAddress)
        external
        onlyRoleOrAdmin(SALES_MANAGER_ROLE)
    {
        // TODO(iain): funds recipient cannot be 0?
        config.fundsRecipient = newRecipientAddress;
        emit FundsRecipientChanged(newRecipientAddress, _msgSender());
    }

    //                       ,-.                  ,-.                      ,-.
    //                       `-'                  `-'                      `-'
    //                       /|\                  /|\                      /|\
    //                        |                    |                        |                      ,----------.
    //                       / \                  / \                      / \                     |ERC721Drop|
    //                     Caller            FeeRecipient            FundsRecipient                `----+-----'
    //                       |                    |           withdraw()   |                            |
    //                       | ------------------------------------------------------------------------->
    //                       |                    |                        |                            |
    //                       |                    |                        |                            |
    //          ________________________________________________________________________________________________________
    //          ! ALT  /  caller is not admin or manager?                  |                            |               !
    //          !_____/      |                    |                        |                            |               !
    //          !            |                    revert Access_WithdrawNotAllowed()                    |               !
    //          !            | <-------------------------------------------------------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                    |                        |                            |
    //                       |                    |                   send fee amount                   |
    //                       |                    | <----------------------------------------------------
    //                       |                    |                        |                            |
    //                       |                    |                        |                            |
    //                       |                    |                        |             ____________________________________________________________
    //                       |                    |                        |             ! ALT  /  send unsuccesful?                                 !
    //                       |                    |                        |             !_____/        |                                            !
    //                       |                    |                        |             !              |----.                                       !
    //                       |                    |                        |             !              |    | revert Withdraw_FundsSendFailure()    !
    //                       |                    |                        |             !              |<---'                                       !
    //                       |                    |                        |             !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                    |                        |             !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                    |                        |                            |
    //                       |                    |                        | send remaining funds amount|
    //                       |                    |                        | <---------------------------
    //                       |                    |                        |                            |
    //                       |                    |                        |                            |
    //                       |                    |                        |             ____________________________________________________________
    //                       |                    |                        |             ! ALT  /  send unsuccesful?                                 !
    //                       |                    |                        |             !_____/        |                                            !
    //                       |                    |                        |             !              |----.                                       !
    //                       |                    |                        |             !              |    | revert Withdraw_FundsSendFailure()    !
    //                       |                    |                        |             !              |<---'                                       !
    //                       |                    |                        |             !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                    |                        |             !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                     Caller            FeeRecipient            FundsRecipient                ,----+-----.
    //                       ,-.                  ,-.                      ,-.                     |ERC721Drop|
    //                       `-'                  `-'                      `-'                     `----------'
    //                       /|\                  /|\                      /|\
    //                        |                    |                        |
    //                       / \                  / \                      / \
    /// @notice This withdraws ETH from the contract to the contract owner.
    function withdraw() external nonReentrant {
        address sender = _msgSender();

        // Get fee amount
        uint256 funds = address(this).balance;
        (address payable feeRecipient, uint256 zoraFee) = zoraFeeForAmount(
            funds
        );

        if (
            !hasRole(DEFAULT_ADMIN_ROLE, sender) &&
            !hasRole(SALES_MANAGER_ROLE, sender) &&
            sender != feeRecipient &&
            sender != config.fundsRecipient
        ) {
            revert Access_WithdrawNotAllowed();
        }

        // Payout ZORA fee
        if (zoraFee > 0) {
            (bool successFee, ) = feeRecipient.call{
                value: zoraFee,
                gas: FUNDS_SEND_GAS_LIMIT
            }("");
            if (!successFee) {
                revert Withdraw_FundsSendFailure();
            }
            funds -= zoraFee;
        }

        // Payout recipient
        (bool successFunds, ) = config.fundsRecipient.call{
            value: funds,
            gas: FUNDS_SEND_GAS_LIMIT
        }("");
        if (!successFunds) {
            revert Withdraw_FundsSendFailure();
        }
    }

    //                       ,-.
    //                       `-'
    //                       /|\
    //                        |                             ,----------.
    //                       / \                            |ERC721Drop|
    //                     Caller                           `----+-----'
    //                       |       finalizeOpenEdition()       |
    //                       | ---------------------------------->
    //                       |                                   |
    //                       |                                   |
    //          _________________________________________________________________
    //          ! ALT  /  caller is not admin or SALES_MANAGER_ROLE?             !
    //          !_____/      |                                   |               !
    //          !            | revert Access_MissingRoleOrAdmin()|               !
    //          !            | <----------------------------------               !
    //          !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //          !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                                   |
    //                       |                                   |
    //                       |                    _______________________________________________________________________
    //                       |                    ! ALT  /  drop is not an open edition?                                 !
    //                       |                    !_____/        |                                                       !
    //                       |                    !              |----.                                                  !
    //                       |                    !              |    | revert Admin_UnableToFinalizeNotOpenEdition()    !
    //                       |                    !              |<---'                                                  !
    //                       |                    !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                    !~[noop]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~!
    //                       |                                   |
    //                       |                                   |----.
    //                       |                                   |    | set config edition size
    //                       |                                   |<---'
    //                       |                                   |
    //                       |                                   |----.
    //                       |                                   |    | emit OpenMintFinalized()
    //                       |                                   |<---'
    //                     Caller                           ,----+-----.
    //                       ,-.                            |ERC721Drop|
    //                       `-'                            `----------'
    //                       /|\
    //                        |
    //                       / \
    /// @notice Admin function to finalize and open edition sale
    function finalizeOpenEdition()
        external
        onlyRoleOrAdmin(SALES_MANAGER_ROLE)
    {
        if (config.editionSize != type(uint64).max) {
            revert Admin_UnableToFinalizeNotOpenEdition();
        }

        config.editionSize = uint64(_totalMinted());
        emit OpenMintFinalized(_msgSender(), config.editionSize);
    }

    /**
     *** ---------------------------------- ***
     ***                                    ***
     ***      GENERAL GETTER FUNCTIONS      ***
     ***                                    ***
     *** ---------------------------------- ***
     ***/

    /// @notice Simple override for owner interface.
    /// @return user owner address
    function owner()
        public
        view
        override(OwnableSkeleton, IERC721Drop)
        returns (address)
    {
        return super.owner();
    }

    /// @notice Contract URI Getter, proxies to metadataRenderer
    /// @return Contract URI
    function contractURI() external view returns (string memory) {
        return config.metadataRenderer.contractURI();
    }

    /// @notice Getter for metadataRenderer contract
    function metadataRenderer() external view returns (IMetadataRenderer) {
        return IMetadataRenderer(config.metadataRenderer);
    }

    /// @notice Token URI Getter, proxies to metadataRenderer
    /// @param tokenId id of token to get URI for
    /// @return Token URI
    function tokenURI(uint256 tokenId)
        public
        view
        override
        returns (string memory)
    {
        if (!_exists(tokenId)) {
            revert IERC721AUpgradeable.URIQueryForNonexistentToken();
        }

        return config.metadataRenderer.tokenURI(tokenId);
    }

    /// @notice ERC165 supports interface
    /// @param interfaceId interface id to check if supported
    function supportsInterface(bytes4 interfaceId)
        public
        view
        override(
            IERC165Upgradeable,
            ERC721AUpgradeable,
            AccessControlUpgradeable
        )
        returns (bool)
    {
        return
            super.supportsInterface(interfaceId) ||
            type(IOwnable).interfaceId == interfaceId ||
            type(IERC2981Upgradeable).interfaceId == interfaceId ||
            type(IERC721Drop).interfaceId == interfaceId;
    }
}

// File: lib/zora-drops-contracts/src/interfaces/IMetadataRenderer.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

interface IMetadataRenderer {
    function tokenURI(uint256) external view returns (string memory);
    function contractURI() external view returns (string memory);
    function initializeWithData(bytes memory initData) external;
}

// File: lib/zora-drops-contracts/src/metadata/MetadataRenderAdminCheck.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

import {IERC721Drop} from "../interfaces/IERC721Drop.sol";

contract MetadataRenderAdminCheck {
    error Access_OnlyAdmin();

    /// @notice Modifier to require the sender to be an admin
    /// @param target address that the user wants to modify
    modifier requireSenderAdmin(address target) {
        if (target != msg.sender && !IERC721Drop(target).isAdmin(msg.sender)) {
            revert Access_OnlyAdmin();
        }

        _;
    }
}

// File: lib/zora-drops-contracts/src/utils/SharedNFTLogic.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

import {StringsUpgradeable} from "@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol";
import {Base64} from "@openzeppelin/contracts/utils/Base64.sol";
import {IPublicSharedMetadata} from "../interfaces/IPublicSharedMetadata.sol";

/// Shared NFT logic for rendering metadata associated with editions
/// @dev Can safely be used for generic base64Encode and numberToString functions
contract SharedNFTLogic is IPublicSharedMetadata {
    /// @param unencoded bytes to base64-encode
    function base64Encode(bytes memory unencoded)
        public
        pure
        override
        returns (string memory)
    {
        return Base64.encode(unencoded);
    }

    /// Proxy to openzeppelin's toString function
    /// @param value number to return as a string
    function numberToString(uint256 value)
        public
        pure
        override
        returns (string memory)
    {
        return StringsUpgradeable.toString(value);
    }

    /// Generate edition metadata from storage information as base64-json blob
    /// Combines the media data and metadata
    /// @param name Name of NFT in metadata
    /// @param description Description of NFT in metadata
    /// @param imageUrl URL of image to render for edition
    /// @param animationUrl URL of animation to render for edition
    /// @param tokenOfEdition Token ID for specific token
    /// @param editionSize Size of entire edition to show
    function createMetadataEdition(
        string memory name,
        string memory description,
        string memory imageUrl,
        string memory animationUrl,
        uint256 tokenOfEdition,
        uint256 editionSize
    ) external pure returns (string memory) {
        string memory _tokenMediaData = tokenMediaData(
            imageUrl,
            animationUrl,
            tokenOfEdition
        );
        bytes memory json = createMetadataJSON(
            name,
            description,
            _tokenMediaData,
            tokenOfEdition,
            editionSize
        );
        return encodeMetadataJSON(json);
    }

    /// Function to create the metadata json string for the nft edition
    /// @param name Name of NFT in metadata
    /// @param description Description of NFT in metadata
    /// @param mediaData Data for media to include in json object
    /// @param tokenOfEdition Token ID for specific token
    /// @param editionSize Size of entire edition to show
    function createMetadataJSON(
        string memory name,
        string memory description,
        string memory mediaData,
        uint256 tokenOfEdition,
        uint256 editionSize
    ) public pure returns (bytes memory) {
        bytes memory editionSizeText;
        if (editionSize > 0) {
            editionSizeText = abi.encodePacked(
                "/",
                numberToString(editionSize)
            );
        }
        return
            abi.encodePacked(
                '{"name": "',
                name,
                " ",
                numberToString(tokenOfEdition),
                editionSizeText,
                '", "',
                'description": "',
                description,
                '", "',
                mediaData,
                'properties": {"number": ',
                numberToString(tokenOfEdition),
                ', "name": "',
                name,
                '"}}'
            );
    }

    /// Encodes the argument json bytes into base64-data uri format
    /// @param json Raw json to base64 and turn into a data-uri
    function encodeMetadataJSON(bytes memory json)
        public
        pure
        override
        returns (string memory)
    {
        return
            string(
                abi.encodePacked(
                    "data:application/json;base64,",
                    base64Encode(json)
                )
            );
    }

    /// Generates edition metadata from storage information as base64-json blob
    /// Combines the media data and metadata
    /// @param imageUrl URL of image to render for edition
    /// @param animationUrl URL of animation to render for edition
    function tokenMediaData(
        string memory imageUrl,
        string memory animationUrl,
        uint256 tokenOfEdition
    ) public pure returns (string memory) {
        bool hasImage = bytes(imageUrl).length > 0;
        bool hasAnimation = bytes(animationUrl).length > 0;
        if (hasImage && hasAnimation) {
            return
                string(
                    abi.encodePacked(
                        'image": "',
                        imageUrl,
                        "?id=",
                        numberToString(tokenOfEdition),
                        '", "animation_url": "',
                        animationUrl,
                        "?id=",
                        numberToString(tokenOfEdition),
                        '", "'
                    )
                );
        }
        if (hasImage) {
            return
                string(
                    abi.encodePacked(
                        'image": "',
                        imageUrl,
                        "?id=",
                        numberToString(tokenOfEdition),
                        '", "'
                    )
                );
        }
        if (hasAnimation) {
            return
                string(
                    abi.encodePacked(
                        'animation_url": "',
                        animationUrl,
                        "?id=",
                        numberToString(tokenOfEdition),
                        '", "'
                    )
                );
        }

        return "";
    }
}

// File: lib/zora-drops-contracts/lib/ERC721A-Upgradeable/contracts/ERC721AUpgradeable.sol



// SPDX-License-Identifier: MIT
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import "./IERC721AUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721ReceiverUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/introspection/ERC165Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension. Built to optimize for lower gas during batch mints.
 *
 * Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..).
 *
 * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
 *
 * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).
 */
contract ERC721AUpgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC721AUpgradeable {
    using AddressUpgradeable for address;
    using StringsUpgradeable for uint256;

    // The tokenId of the next token to be minted.
    uint256 internal _currentIndex;

    // The number of tokens burned.
    uint256 internal _burnCounter;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to ownership details
    // An empty struct value does not necessarily mean the token is unowned. See _ownershipOf implementation for details.
    mapping(uint256 => TokenOwnership) internal _ownerships;

    // Mapping owner address to address data
    mapping(address => AddressData) private _addressData;

    // Mapping from token ID to approved address
    mapping(uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    function __ERC721A_init(string memory name_, string memory symbol_) internal onlyInitializing {
        __ERC721A_init_unchained(name_, symbol_);
    }

    function __ERC721A_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {
        _name = name_;
        _symbol = symbol_;
        _currentIndex = _startTokenId();
    }

    /**
     * To change the starting tokenId, please override this function.
     */
    function _startTokenId() internal view virtual returns (uint256) {
        return 0;
    }

    /**
     * @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
     */
    function totalSupply() public view override returns (uint256) {
        // Counter underflow is impossible as _burnCounter cannot be incremented
        // more than _currentIndex - _startTokenId() times
        unchecked {
            return _currentIndex - _burnCounter - _startTokenId();
        }
    }

    /**
     * Returns the total amount of tokens minted in the contract.
     */
    function _totalMinted() internal view returns (uint256) {
        // Counter underflow is impossible as _currentIndex does not decrement,
        // and it is initialized to _startTokenId()
        unchecked {
            return _currentIndex - _startTokenId();
        }
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) {
        return
            interfaceId == type(IERC721Upgradeable).interfaceId ||
            interfaceId == type(IERC721MetadataUpgradeable).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view override returns (uint256) {
        if (owner == address(0)) revert BalanceQueryForZeroAddress();
        return uint256(_addressData[owner].balance);
    }

    /**
     * Returns the number of tokens minted by `owner`.
     */
    function _numberMinted(address owner) internal view returns (uint256) {
        return uint256(_addressData[owner].numberMinted);
    }

    /**
     * Returns the number of tokens burned by or on behalf of `owner`.
     */
    function _numberBurned(address owner) internal view returns (uint256) {
        return uint256(_addressData[owner].numberBurned);
    }

    /**
     * Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
     */
    function _getAux(address owner) internal view returns (uint64) {
        return _addressData[owner].aux;
    }

    /**
     * Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
     * If there are multiple variables, please pack them into a uint64.
     */
    function _setAux(address owner, uint64 aux) internal {
        _addressData[owner].aux = aux;
    }

    /**
     * Gas spent here starts off proportional to the maximum mint batch size.
     * It gradually moves to O(1) as tokens get transferred around in the collection over time.
     */
    function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
        uint256 curr = tokenId;

        unchecked {
            if (_startTokenId() <= curr && curr < _currentIndex) {
                TokenOwnership memory ownership = _ownerships[curr];
                if (!ownership.burned) {
                    if (ownership.addr != address(0)) {
                        return ownership;
                    }
                    // Invariant:
                    // There will always be an ownership that has an address and is not burned
                    // before an ownership that does not have an address and is not burned.
                    // Hence, curr will not underflow.
                    while (true) {
                        curr--;
                        ownership = _ownerships[curr];
                        if (ownership.addr != address(0)) {
                            return ownership;
                        }
                    }
                }
            }
        }
        revert OwnerQueryForNonexistentToken();
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view override returns (address) {
        return _ownershipOf(tokenId).addr;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();

        string memory baseURI = _baseURI();
        return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : '';
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overriden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return '';
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public override {
        address owner = ERC721AUpgradeable.ownerOf(tokenId);
        if (to == owner) revert ApprovalToCurrentOwner();

        if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) {
            revert ApprovalCallerNotOwnerNorApproved();
        }

        _approve(to, tokenId, owner);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view override returns (address) {
        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        if (operator == _msgSender()) revert ApproveToCaller();

        _operatorApprovals[_msgSender()][operator] = approved;
        emit ApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        safeTransferFrom(from, to, tokenId, '');
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public virtual override {
        _transfer(from, to, tokenId);
        if (to.isContract() && !_checkContractOnERC721Received(from, to, tokenId, _data)) {
            revert TransferToNonERC721ReceiverImplementer();
        }
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     */
    function _exists(uint256 tokenId) internal view returns (bool) {
        return _startTokenId() <= tokenId && tokenId < _currentIndex && !_ownerships[tokenId].burned;
    }

    /**
     * @dev Equivalent to `_safeMint(to, quantity, '')`.
     */
    function _safeMint(address to, uint256 quantity) internal {
        _safeMint(to, quantity, '');
    }

    /**
     * @dev Safely mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - If `to` refers to a smart contract, it must implement
     *   {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(
        address to,
        uint256 quantity,
        bytes memory _data
    ) internal {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
        // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
        unchecked {
            _addressData[to].balance += uint64(quantity);
            _addressData[to].numberMinted += uint64(quantity);

            _ownerships[startTokenId].addr = to;
            _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);

            uint256 updatedIndex = startTokenId;
            uint256 end = updatedIndex + quantity;

            if (to.isContract()) {
                do {
                    emit Transfer(address(0), to, updatedIndex);
                    if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) {
                        revert TransferToNonERC721ReceiverImplementer();
                    }
                } while (updatedIndex != end);
                // Reentrancy protection
                if (_currentIndex != startTokenId) revert();
            } else {
                do {
                    emit Transfer(address(0), to, updatedIndex++);
                } while (updatedIndex != end);
            }
            _currentIndex = updatedIndex;
        }
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 quantity) internal {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
        // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
        unchecked {
            _addressData[to].balance += uint64(quantity);
            _addressData[to].numberMinted += uint64(quantity);

            _ownerships[startTokenId].addr = to;
            _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);

            uint256 updatedIndex = startTokenId;
            uint256 end = updatedIndex + quantity;

            do {
                emit Transfer(address(0), to, updatedIndex++);
            } while (updatedIndex != end);

            _currentIndex = updatedIndex;
        }
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) private {
        TokenOwnership memory prevOwnership = _ownershipOf(tokenId);

        if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();

        bool isApprovedOrOwner = (_msgSender() == from ||
            isApprovedForAll(from, _msgSender()) ||
            getApproved(tokenId) == _msgSender());

        if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        if (to == address(0)) revert TransferToZeroAddress();

        _beforeTokenTransfers(from, to, tokenId, 1);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId, from);

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
        unchecked {
            _addressData[from].balance -= 1;
            _addressData[to].balance += 1;

            TokenOwnership storage currSlot = _ownerships[tokenId];
            currSlot.addr = to;
            currSlot.startTimestamp = uint64(block.timestamp);

            // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
            uint256 nextTokenId = tokenId + 1;
            TokenOwnership storage nextSlot = _ownerships[nextTokenId];
            if (nextSlot.addr == address(0)) {
                // This will suffice for checking _exists(nextTokenId),
                // as a burned slot cannot contain the zero address.
                if (nextTokenId != _currentIndex) {
                    nextSlot.addr = from;
                    nextSlot.startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

        emit Transfer(from, to, tokenId);
        _afterTokenTransfers(from, to, tokenId, 1);
    }

    /**
     * @dev Equivalent to `_burn(tokenId, false)`.
     */
    function _burn(uint256 tokenId) internal virtual {
        _burn(tokenId, false);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId, bool approvalCheck) internal virtual {
        TokenOwnership memory prevOwnership = _ownershipOf(tokenId);

        address from = prevOwnership.addr;

        if (approvalCheck) {
            bool isApprovedOrOwner = (_msgSender() == from ||
                isApprovedForAll(from, _msgSender()) ||
                getApproved(tokenId) == _msgSender());

            if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        }

        _beforeTokenTransfers(from, address(0), tokenId, 1);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId, from);

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
        unchecked {
            AddressData storage addressData = _addressData[from];
            addressData.balance -= 1;
            addressData.numberBurned += 1;

            // Keep track of who burned the token, and the timestamp of burning.
            TokenOwnership storage currSlot = _ownerships[tokenId];
            currSlot.addr = from;
            currSlot.startTimestamp = uint64(block.timestamp);
            currSlot.burned = true;

            // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
            uint256 nextTokenId = tokenId + 1;
            TokenOwnership storage nextSlot = _ownerships[nextTokenId];
            if (nextSlot.addr == address(0)) {
                // This will suffice for checking _exists(nextTokenId),
                // as a burned slot cannot contain the zero address.
                if (nextTokenId != _currentIndex) {
                    nextSlot.addr = from;
                    nextSlot.startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

        emit Transfer(from, address(0), tokenId);
        _afterTokenTransfers(from, address(0), tokenId, 1);

        // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
        unchecked {
            _burnCounter++;
        }
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(
        address to,
        uint256 tokenId,
        address owner
    ) private {
        _tokenApprovals[tokenId] = to;
        emit Approval(owner, to, tokenId);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkContractOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        try IERC721ReceiverUpgradeable(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
            return retval == IERC721ReceiverUpgradeable(to).onERC721Received.selector;
        } catch (bytes memory reason) {
            if (reason.length == 0) {
                revert TransferToNonERC721ReceiverImplementer();
            } else {
                assembly {
                    revert(add(32, reason), mload(reason))
                }
            }
        }
    }

    /**
     * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
     * And also called before burning one token.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, `tokenId` will be burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _beforeTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}

    /**
     * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
     * minting.
     * And also called after one token has been burned.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
     * transferred to `to`.
     * - When `from` is zero, `tokenId` has been minted for `to`.
     * - When `to` is zero, `tokenId` has been burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _afterTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[42] private __gap;
}

// File: lib/zora-drops-contracts/lib/ERC721A-Upgradeable/contracts/IERC721AUpgradeable.sol



// SPDX-License-Identifier: MIT
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC721/extensions/IERC721MetadataUpgradeable.sol";

/**
 * @dev Interface of an ERC721A compliant contract.
 */
interface IERC721AUpgradeable is IERC721Upgradeable, IERC721MetadataUpgradeable {
    /**
     * The caller must own the token or be an approved operator.
     */
    error ApprovalCallerNotOwnerNorApproved();

    /**
     * The token does not exist.
     */
    error ApprovalQueryForNonexistentToken();

    /**
     * The caller cannot approve to their own address.
     */
    error ApproveToCaller();

    /**
     * The caller cannot approve to the current owner.
     */
    error ApprovalToCurrentOwner();

    /**
     * Cannot query the balance for the zero address.
     */
    error BalanceQueryForZeroAddress();

    /**
     * Cannot mint to the zero address.
     */
    error MintToZeroAddress();

    /**
     * The quantity of tokens minted must be more than zero.
     */
    error MintZeroQuantity();

    /**
     * The token does not exist.
     */
    error OwnerQueryForNonexistentToken();

    /**
     * The caller must own the token or be an approved operator.
     */
    error TransferCallerNotOwnerNorApproved();

    /**
     * The token must be owned by `from`.
     */
    error TransferFromIncorrectOwner();

    /**
     * Cannot safely transfer to a contract that does not implement the ERC721Receiver interface.
     */
    error TransferToNonERC721ReceiverImplementer();

    /**
     * Cannot transfer to the zero address.
     */
    error TransferToZeroAddress();

    /**
     * The token does not exist.
     */
    error URIQueryForNonexistentToken();

    // Compiler will pack this into a single 256bit word.
    struct TokenOwnership {
        // The address of the owner.
        address addr;
        // Keeps track of the start time of ownership with minimal overhead for tokenomics.
        uint64 startTimestamp;
        // Whether the token has been burned.
        bool burned;
    }

    // Compiler will pack this into a single 256bit word.
    struct AddressData {
        // Realistically, 2**64-1 is more than enough.
        uint64 balance;
        // Keeps track of mint count with minimal overhead for tokenomics.
        uint64 numberMinted;
        // Keeps track of burn count with minimal overhead for tokenomics.
        uint64 numberBurned;
        // For miscellaneous variable(s) pertaining to the address
        // (e.g. number of whitelist mint slots used).
        // If there are multiple variables, please pack them into a uint64.
        uint64 aux;
    }

    /**
     * @dev Returns the total amount of tokens stored by the contract.
     * @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
     */
    function totalSupply() external view returns (uint256);
}

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/interfaces/IERC2981Upgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/IERC2981.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Interface for the NFT Royalty Standard.
 *
 * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal
 * support for royalty payments across all NFT marketplaces and ecosystem participants.
 *
 * _Available since v4.5._
 */
interface IERC2981Upgradeable is IERC165Upgradeable {
    /**
     * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
     * exchange. The royalty amount is denominated and should be payed in that same unit of exchange.
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice)
        external
        view
        returns (address receiver, uint256 royaltyAmount);
}

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/access/AccessControlUpgradeable.sol



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

pragma solidity ^0.8.0;

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

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

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

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

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

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

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

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

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

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

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

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

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

        _revokeRole(role, account);
    }

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

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

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

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

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

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/security/ReentrancyGuardUpgradeable.sol



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

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

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

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

    uint256 private _status;

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

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

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

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

        _;

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

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

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/utils/cryptography/MerkleProofUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (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.
 *
 * WARNING: You should avoid using leaf values that are 64 bytes long prior to
 * hashing, or use a hash function other than keccak256 for hashing leaves.
 * This is because the concatenation of a sorted pair of internal nodes in
 * the merkle tree could be reinterpreted as a leaf value.
 */
library MerkleProofUpgradeable {
    /**
     * @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 Merkle 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 = _efficientHash(computedHash, proofElement);
            } else {
                // Hash(current element of the proof + current computed hash)
                computedHash = _efficientHash(proofElement, computedHash);
            }
        }
        return computedHash;
    }

    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/proxy/utils/UUPSUpgradeable.sol



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

pragma solidity ^0.8.0;

import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../ERC1967/ERC1967UpgradeUpgradeable.sol";
import "./Initializable.sol";

/**
 * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
 * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
 *
 * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
 * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
 * `UUPSUpgradeable` with a custom implementation of upgrades.
 *
 * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
 *
 * _Available since v4.1._
 */
abstract contract UUPSUpgradeable is Initializable, IERC1822ProxiableUpgradeable, ERC1967UpgradeUpgradeable {
    function __UUPSUpgradeable_init() internal onlyInitializing {
    }

    function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
    }
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
    address private immutable __self = address(this);

    /**
     * @dev Check that the execution is being performed through a delegatecall call and that the execution context is
     * a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
     * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
     * function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
     * fail.
     */
    modifier onlyProxy() {
        require(address(this) != __self, "Function must be called through delegatecall");
        require(_getImplementation() == __self, "Function must be called through active proxy");
        _;
    }

    /**
     * @dev Check that the execution is not being performed through a delegate call. This allows a function to be
     * callable on the implementing contract but not through proxies.
     */
    modifier notDelegated() {
        require(address(this) == __self, "UUPSUpgradeable: must not be called through delegatecall");
        _;
    }

    /**
     * @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the
     * implementation. It is used to validate that the this implementation remains valid after an upgrade.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
     */
    function proxiableUUID() external view virtual override notDelegated returns (bytes32) {
        return _IMPLEMENTATION_SLOT;
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     */
    function upgradeTo(address newImplementation) external virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, new bytes(0), false);
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
     * encoded in `data`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) external payable virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, data, true);
    }

    /**
     * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
     * {upgradeTo} and {upgradeToAndCall}.
     *
     * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
     *
     * ```solidity
     * function _authorizeUpgrade(address) internal override onlyOwner {}
     * ```
     */
    function _authorizeUpgrade(address newImplementation) internal virtual;

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

// File: lib/zora-drops-contracts/src/interfaces/IZoraFeeManager.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

interface IZoraFeeManager {
    function getZORAWithdrawFeesBPS(address sender) external returns (address payable, uint256);
}

// File: lib/zora-drops-contracts/src/interfaces/IOwnable.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

/**
 * @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.
 *
 * This ownership interface matches OZ's ownable interface.
 *
 */
interface IOwnable {
    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() external view returns (address);
}

// File: lib/zora-drops-contracts/src/utils/OwnableSkeleton.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

import {IOwnable} from "../interfaces/IOwnable.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.
 *
 * This ownership interface matches OZ's ownable interface.
 */
contract OwnableSkeleton is IOwnable {
    address private _owner;

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

    function _setOwner(address newAddress) internal {
        emit OwnershipTransferred(_owner, newAddress);
        _owner = newAddress;
    }
}

// File: lib/zora-drops-contracts/src/utils/FundsReceiver.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

/**
 * @notice This allows this contract to receive native currency funds from other contracts
 * Uses event logging for UI reasons.
 */
contract FundsReceiver {
    event FundsReceived(address indexed source, uint256 amount);

    receive() external payable {
        emit FundsReceived(msg.sender, msg.value);
    }
}

// File: lib/zora-drops-contracts/src/utils/Version.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

contract Version {
  uint32 private immutable __version;

  /// @notice The version of the contract
  /// @return The version ID of this contract implementation
  function contractVersion() external view returns (uint32) {
      return __version;
  }

  constructor(uint32 version) {
    __version = version;
  }
}
// File: lib/zora-drops-contracts/src/FactoryUpgradeGate.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

import {IFactoryUpgradeGate} from "./interfaces/IFactoryUpgradeGate.sol";
import "./utils/OwnableSkeleton.sol";

/**

 ________   _____   ____    ______      ____
/\_____  \ /\  __`\/\  _`\ /\  _  \    /\  _`\
\/____//'/'\ \ \/\ \ \ \L\ \ \ \L\ \   \ \ \/\ \  _ __   ___   _____     ____
     //'/'  \ \ \ \ \ \ ,  /\ \  __ \   \ \ \ \ \/\`'__\/ __`\/\ '__`\  /',__\
    //'/'___ \ \ \_\ \ \ \\ \\ \ \/\ \   \ \ \_\ \ \ \//\ \L\ \ \ \L\ \/\__, `\
    /\_______\\ \_____\ \_\ \_\ \_\ \_\   \ \____/\ \_\\ \____/\ \ ,__/\/\____/
    \/_______/ \/_____/\/_/\/ /\/_/\/_/    \/___/  \/_/ \/___/  \ \ \/  \/___/
                                                                 \ \_\
                                                                  \/_/

 */

/// @notice This contract handles gating allowed upgrades for Zora drops contracts
contract FactoryUpgradeGate is IFactoryUpgradeGate, OwnableSkeleton {
    /// @notice Private mapping of valid upgrade paths
    mapping(address => mapping(address => bool)) private _validUpgradePaths;

    /// @notice Emitted when an upgrade path is added / registered
    event UpgradePathRegistered(address newImpl, address oldImpl);

    /// @notice Emitted when an upgrade path is removed
    event UpgradePathRemoved(address newImpl, address oldImpl);

    /// @notice Error for when not called from admin
    error Access_OnlyOwner();

    /// @dev Modifier to gate only owner access
    modifier onlyOwner() {
        if (msg.sender != owner()) {
            revert Access_OnlyOwner();
        }

        _;
    }

    /// @notice Sets the owner and inits the contract
    /// @param _owner owner of the contract
    constructor(address _owner) {
        _setOwner(_owner);
    }

    /// @notice Ensures the given upgrade path is valid and does not overwrite existing storage slots
    /// @param _newImpl The proposed implementation address
    /// @param _currentImpl The current implementation address
    function isValidUpgradePath(address _newImpl, address _currentImpl)
        external
        view
        returns (bool)
    {
        return _validUpgradePaths[_newImpl][_currentImpl];
    }

    /// @notice Registers a new safe upgrade path for an implementation
    /// @param _newImpl The new implementation
    /// @param _supportedPrevImpls Safe implementations that can upgrade to this new implementation
    function registerNewUpgradePath(
        address _newImpl,
        address[] calldata _supportedPrevImpls
    ) external onlyOwner {
        for (uint256 i = 0; i < _supportedPrevImpls.length; i++) {
            _validUpgradePaths[_newImpl][_supportedPrevImpls[i]] = true;
            emit UpgradePathRegistered(_newImpl, _supportedPrevImpls[i]);
        }
    }

    /// @notice Unregisters an upgrade path, in case of emergency
    /// @param _newImpl the newer implementation
    /// @param _prevImpl the older implementation
    function unregisterUpgradePath(address _newImpl, address _prevImpl)
        external
        onlyOwner
    {
        _validUpgradePaths[_newImpl][_prevImpl] = false;
        emit UpgradePathRemoved(_newImpl, _prevImpl);
    }
}

// File: lib/zora-drops-contracts/src/storage/ERC721DropStorageV1.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

import {IERC721Drop} from "../interfaces/IERC721Drop.sol";

contract ERC721DropStorageV1 {
    /// @notice Configuration for NFT minting contract storage
    IERC721Drop.Configuration public config;

    /// @notice Sales configuration
    IERC721Drop.SalesConfiguration public salesConfig;

    /// @dev Mapping for presale mint counts by address to allow public mint limit
    mapping(address => uint256) public presaleMintsByAddress;
}

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/utils/StringsUpgradeable.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts/contracts/utils/Base64.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Base64.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides a set of functions to operate with Base64 strings.
 *
 * _Available since v4.5._
 */
library Base64 {
    /**
     * @dev Base64 Encoding/Decoding Table
     */
    string internal constant _TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

    /**
     * @dev Converts a `bytes` to its Bytes64 `string` representation.
     */
    function encode(bytes memory data) internal pure returns (string memory) {
        /**
         * Inspired by Brecht Devos (Brechtpd) implementation - MIT licence
         * https://github.com/Brechtpd/base64/blob/e78d9fd951e7b0977ddca77d92dc85183770daf4/base64.sol
         */
        if (data.length == 0) return "";

        // Loads the table into memory
        string memory table = _TABLE;

        // Encoding takes 3 bytes chunks of binary data from `bytes` data parameter
        // and split into 4 numbers of 6 bits.
        // The final Base64 length should be `bytes` data length multiplied by 4/3 rounded up
        // - `data.length + 2`  -> Round up
        // - `/ 3`              -> Number of 3-bytes chunks
        // - `4 *`              -> 4 characters for each chunk
        string memory result = new string(4 * ((data.length + 2) / 3));

        assembly {
            // Prepare the lookup table (skip the first "length" byte)
            let tablePtr := add(table, 1)

            // Prepare result pointer, jump over length
            let resultPtr := add(result, 32)

            // Run over the input, 3 bytes at a time
            for {
                let dataPtr := data
                let endPtr := add(data, mload(data))
            } lt(dataPtr, endPtr) {

            } {
                // Advance 3 bytes
                dataPtr := add(dataPtr, 3)
                let input := mload(dataPtr)

                // To write each character, shift the 3 bytes (18 bits) chunk
                // 4 times in blocks of 6 bits for each character (18, 12, 6, 0)
                // and apply logical AND with 0x3F which is the number of
                // the previous character in the ASCII table prior to the Base64 Table
                // The result is then added to the table to get the character to write,
                // and finally write it in the result pointer but with a left shift
                // of 256 (1 byte) - 8 (1 ASCII char) = 248 bits

                mstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(shr(6, input), 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance

                mstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F))))
                resultPtr := add(resultPtr, 1) // Advance
            }

            // When data `bytes` is not exactly 3 bytes long
            // it is padded with `=` characters at the end
            switch mod(mload(data), 3)
            case 1 {
                mstore8(sub(resultPtr, 1), 0x3d)
                mstore8(sub(resultPtr, 2), 0x3d)
            }
            case 2 {
                mstore8(sub(resultPtr, 1), 0x3d)
            }
        }

        return result;
    }
}

// File: lib/zora-drops-contracts/src/interfaces/IPublicSharedMetadata.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

/// Shared public library for on-chain NFT functions
interface IPublicSharedMetadata {
    /// @param unencoded bytes to base64-encode
    function base64Encode(bytes memory unencoded)
        external
        pure
        returns (string memory);

    /// Encodes the argument json bytes into base64-data uri format
    /// @param json Raw json to base64 and turn into a data-uri
    function encodeMetadataJSON(bytes memory json)
        external
        pure
        returns (string memory);

    /// Proxy to openzeppelin's toString function
    /// @param value number to return as a string
    function numberToString(uint256 value)
        external
        pure
        returns (string memory);
}

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/token/ERC721/IERC721ReceiverUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721ReceiverUpgradeable {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/utils/AddressUpgradeable.sol



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

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/utils/ContextUpgradeable.sol



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

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

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

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

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

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

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/utils/introspection/ERC165Upgradeable.sol



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

pragma solidity ^0.8.0;

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

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

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

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

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/proxy/utils/Initializable.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }

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

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

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/token/ERC721/IERC721Upgradeable.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/token/ERC721/extensions/IERC721MetadataUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC721Upgradeable.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721MetadataUpgradeable is IERC721Upgradeable {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/utils/introspection/IERC165Upgradeable.sol



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

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165Upgradeable {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/access/IAccessControlUpgradeable.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/interfaces/draft-IERC1822Upgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822ProxiableUpgradeable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/proxy/ERC1967/ERC1967UpgradeUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeaconUpgradeable.sol";
import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/StorageSlotUpgradeable.sol";
import "../utils/Initializable.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967UpgradeUpgradeable is Initializable {
    function __ERC1967Upgrade_init() internal onlyInitializing {
    }

    function __ERC1967Upgrade_init_unchained() internal onlyInitializing {
    }
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            _functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822ProxiableUpgradeable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Emitted when the beacon is upgraded.
     */
    event BeaconUpgraded(address indexed beacon);

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(
        address newBeacon,
        bytes memory data,
        bool forceCall
    ) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            _functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
        }
    }

    /**
     * @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) private returns (bytes memory) {
        require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed");
    }

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

// File: lib/zora-drops-contracts/src/interfaces/IFactoryUpgradeGate.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

interface IFactoryUpgradeGate {
  function isValidUpgradePath(address _newImpl, address _currentImpl) external returns (bool);

  function registerNewUpgradePath(address _newImpl, address[] calldata _supportedPrevImpls) external;

  function unregisterUpgradePath(address _newImpl, address _prevImpl) external;
}
// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/proxy/beacon/IBeaconUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeaconUpgradeable {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

// File: lib/zora-drops-contracts/lib/openzeppelin-contracts-upgradeable/contracts/utils/StorageSlotUpgradeable.sol



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

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlotUpgradeable {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly {
            r.slot := slot
        }
    }
}