Contract Address Details

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

import {IMetadataRenderer} from "../interfaces/IMetadataRenderer.sol";
import {IERC721Drop} from "../interfaces/IERC721Drop.sol";
import {IERC721MetadataUpgradeable} from "@openzeppelin/contracts-upgradeable/interfaces/IERC721MetadataUpgradeable.sol";
import {IERC2981Upgradeable} from "@openzeppelin/contracts-upgradeable/interfaces/IERC2981Upgradeable.sol";
import {NFTMetadataRenderer} from "../utils/NFTMetadataRenderer.sol";
import {MetadataRenderAdminCheck} from "./MetadataRenderAdminCheck.sol";

interface DropConfigGetter {
    function config()
        external
        view
        returns (IERC721Drop.Configuration memory config);
}

/// @notice EditionMetadataRenderer for editions support
contract EditionMetadataRenderer is
    IMetadataRenderer,
    MetadataRenderAdminCheck
{
    /// @notice Storage for token edition information
    struct TokenEditionInfo {
        string description;
        string imageURI;
        string animationURI;
    }

    /// @notice Event for updated Media URIs
    event MediaURIsUpdated(
        address indexed target,
        address sender,
        string imageURI,
        string animationURI
    );

    /// @notice Event for a new edition initialized
    /// @dev admin function indexer feedback
    event EditionInitialized(
        address indexed target,
        string description,
        string imageURI,
        string animationURI
    );

    /// @notice Description updated for this edition
    /// @dev admin function indexer feedback
    event DescriptionUpdated(
        address indexed target,
        address sender,
        string newDescription
    );

    /// @notice Token information mapping storage
    mapping(address => TokenEditionInfo) public tokenInfos;

    /// @notice Update media URIs
    /// @param target target for contract to update metadata for
    /// @param imageURI new image uri address
    /// @param animationURI new animation uri address
    function updateMediaURIs(
        address target,
        string memory imageURI,
        string memory animationURI
    ) external requireSenderAdmin(target) {
        tokenInfos[target].imageURI = imageURI;
        tokenInfos[target].animationURI = animationURI;
        emit MediaURIsUpdated({
            target: target,
            sender: msg.sender,
            imageURI: imageURI,
            animationURI: animationURI
        });
    }

    /// @notice Admin function to update description
    /// @param target target description
    /// @param newDescription new description
    function updateDescription(address target, string memory newDescription)
        external
        requireSenderAdmin(target)
    {
        tokenInfos[target].description = newDescription;

        emit DescriptionUpdated({
            target: target,
            sender: msg.sender,
            newDescription: newDescription
        });
    }

    /// @notice Default initializer for edition data from a specific contract
    /// @param data data to init with
    function initializeWithData(bytes memory data) external {
        // data format: description, imageURI, animationURI
        (
            string memory description,
            string memory imageURI,
            string memory animationURI
        ) = abi.decode(data, (string, string, string));

        tokenInfos[msg.sender] = TokenEditionInfo({
            description: description,
            imageURI: imageURI,
            animationURI: animationURI
        });
        emit EditionInitialized({
            target: msg.sender,
            description: description,
            imageURI: imageURI,
            animationURI: animationURI
        });
    }

    /// @notice Contract URI information getter
    /// @return contract uri (if set)
    function contractURI() external view override returns (string memory) {
        address target = msg.sender;
        TokenEditionInfo storage editionInfo = tokenInfos[target];
        IERC721Drop.Configuration memory config = DropConfigGetter(target)
            .config();

        return
            NFTMetadataRenderer.encodeContractURIJSON({
                name: IERC721MetadataUpgradeable(target).name(),
                description: editionInfo.description,
                imageURI: editionInfo.imageURI,
                animationURI: editionInfo.animationURI,
                royaltyBPS: uint256(config.royaltyBPS),
                royaltyRecipient: config.fundsRecipient
            });
    }

    /// @notice Token URI information getter
    /// @param tokenId to get uri for
    /// @return contract uri (if set)
    function tokenURI(uint256 tokenId)
        external
        view
        override
        returns (string memory)
    {
        address target = msg.sender;

        TokenEditionInfo memory info = tokenInfos[target];
        IERC721Drop media = IERC721Drop(target);

        uint256 maxSupply = media.saleDetails().maxSupply;

        // For open editions, set max supply to 0 for renderer to remove the edition max number
        // This will be added back on once the open edition is "finalized"
        if (maxSupply == type(uint64).max) {
            maxSupply = 0;
        }

        return
            NFTMetadataRenderer.createMetadataEdition({
                name: IERC721MetadataUpgradeable(target).name(),
                description: info.description,
                imageURI: info.imageURI,
                animationURI: info.animationURI,
                tokenOfEdition: tokenId,
                editionSize: maxSupply
            });
    }
}
        

// 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;
}
          

// 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 Sales configuration has been changed
    /// @dev To access new sales configuration, use getter function.
    /// @param changedBy Changed by user
    event SalesConfigChanged(address indexed changedBy);

    /// @notice Event emitted when the funds recipient is changed
    /// @param newAddress new address for the funds recipient
    /// @param changedBy address that the recipient is changed by
    event FundsRecipientChanged(
        address indexed newAddress,
        address indexed changedBy
    );

    /// @notice Event emitted when the funds are withdrawn from the minting contract
    /// @param withdrawnBy address that issued the withdraw
    /// @param withdrawnTo address that the funds were withdrawn to
    /// @param amount amount that was withdrawn
    /// @param feeRecipient user getting withdraw fee (if any)
    /// @param feeAmount amount of the fee getting sent (if any)
    event FundsWithdrawn(
        address indexed withdrawnBy,
        address indexed withdrawnTo,
        uint256 amount,
        address feeRecipient,
        uint256 feeAmount
    );

    /// @notice Event emitted when an open mint is finalized and further minting is closed forever on the contract.
    /// @param sender address sending close mint
    /// @param numberOfMints number of mints the contract is finalized at
    event OpenMintFinalized(address indexed sender, uint256 numberOfMints);

    /// @notice Event emitted when metadata renderer is updated.
    /// @param sender address of the updater
    /// @param renderer new metadata renderer address
    event UpdatedMetadataRenderer(address sender, IMetadataRenderer renderer);


    /// @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 Update the metadata renderer
    /// @param newRenderer new address for renderer
    /// @param setupRenderer data to call to bootstrap data for the new renderer (optional)
    function setMetadataRenderer(IMetadataRenderer newRenderer, bytes memory setupRenderer) external;

    /// @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);
}
          

// 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);
}
          

// 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);
}
          

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

pragma solidity ^0.8.0;

import "../token/ERC721/extensions/IERC721MetadataUpgradeable.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;
    }
}
          

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

import {Strings} from "@openzeppelin/contracts/utils/Strings.sol";
import {Base64} from "@openzeppelin/contracts/utils/Base64.sol";

/// NFT metadata library for rendering metadata associated with editions
library NFTMetadataRenderer {
    /// 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 imageURI URI of image to render for edition
    /// @param animationURI URI 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 imageURI,
        string memory animationURI,
        uint256 tokenOfEdition,
        uint256 editionSize
    ) internal pure returns (string memory) {
        string memory _tokenMediaData = tokenMediaData(
            imageURI,
            animationURI
        );
        bytes memory json = createMetadataJSON(
            name,
            description,
            _tokenMediaData,
            tokenOfEdition,
            editionSize
        );
        return encodeMetadataJSON(json);
    }

    function encodeContractURIJSON(
        string memory name,
        string memory description,
        string memory imageURI,
        string memory animationURI,
        uint256 royaltyBPS,
        address royaltyRecipient
    ) internal pure returns (string memory) {
        bytes memory imageSpace = bytes("");
        if (bytes(imageURI).length > 0) {
            imageSpace = abi.encodePacked('", "image": "', imageURI);
        }
        bytes memory animationSpace = bytes("");
        if (bytes(animationURI).length > 0) {
            animationSpace = abi.encodePacked('", "animation_url": "', animationURI);
        }

        return
            string(
                encodeMetadataJSON(
                    abi.encodePacked(
                        '{"name": "',
                        name,
                        '", "description": "',
                        description,
                        // this is for opensea since they don't respect ERC2981 right now
                        '", "seller_fee_basis_points": ',
                        Strings.toString(royaltyBPS),
                        ', "fee_recipient": "',
                        Strings.toHexString(uint256(uint160(royaltyRecipient)), 20),
                        imageSpace,
                        animationSpace,
                        '"}'
                    )
                )
            );
    }

    /// 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
    ) internal pure returns (bytes memory) {
        bytes memory editionSizeText;
        if (editionSize > 0) {
            editionSizeText = abi.encodePacked(
                "/",
                Strings.toString(editionSize)
            );
        }
        return
            abi.encodePacked(
                '{"name": "',
                name,
                " ",
                Strings.toString(tokenOfEdition),
                editionSizeText,
                '", "',
                'description": "',
                description,
                '", "',
                mediaData,
                'properties": {"number": ',
                Strings.toString(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)
        internal
        pure
        returns (string memory)
    {
        return
            string(
                abi.encodePacked(
                    "data:application/json;base64,",
                    Base64.encode(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
    ) internal 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,
                        '", "animation_url": "',
                        animationUrl,
                        '", "'
                    )
                );
        }
        if (hasImage) {
            return string(abi.encodePacked('image": "', imageUrl, '", "'));
        }
        if (hasAnimation) {
            return
                string(
                    abi.encodePacked('animation_url": "', animationUrl, '", "')
                );
        }

        return "";
    }
}
          

// 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();
        }

        _;
    }
}
          

// 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;
}
          

// 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);
}
          

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

pragma solidity ^0.8.0;

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

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

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

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

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