//SPDX-License-Identifier: MIT
pragma solidity ^0.8.1;
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [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 Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data)
        internal
        returns (bytes memory)
    {
        return
            functionDelegateCall(
                target,
                data,
                "Address: low-level delegate call failed"
            );
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;
    /**
     * @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);
    }
    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }
}
pragma solidity ^0.8.7;
abstract contract MerkleProof {
    bytes32 internal _wlMerkleRoot;
    bytes32 internal _wlPMerkleRoot;
    function _setWlMerkleRoot(bytes32 merkleRoot_) internal virtual {
        _wlMerkleRoot = merkleRoot_;
    }
    function isWhitelisted(
        address address_,
        uint256 wlCount,
        bytes32[] memory proof_
    ) public view returns (bool) {
        bytes32 _leaf = keccak256(abi.encodePacked(address_, wlCount));
        for (uint256 i = 0; i < proof_.length; i++) {
            _leaf = _leaf < proof_[i]
                ? keccak256(abi.encodePacked(_leaf, proof_[i]))
                : keccak256(abi.encodePacked(proof_[i], _leaf));
        }
        return _leaf == _wlMerkleRoot;
    }
    // WL
    function _setPWlMerkleRoot(bytes32 merkleRoot_) internal virtual {
        _wlPMerkleRoot = merkleRoot_;
    }
    function isPWhitelisted(address address_, bytes32[] memory proof_)
        public
        view
        returns (bool)
    {
        bytes32 _leaf = keccak256(abi.encodePacked(address_));
        for (uint256 i = 0; i < proof_.length; i++) {
            _leaf = _leaf < proof_[i]
                ? keccak256(abi.encodePacked(_leaf, proof_[i]))
                : keccak256(abi.encodePacked(proof_[i], _leaf));
        }
        return _leaf == _wlPMerkleRoot;
    }
}
// OpenZeppelin Contracts (last updated v4.7.0) (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));
        /// @solidity memory-safe-assembly
        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;
    }
}
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(
        address indexed from,
        address indexed to,
        uint256 indexed tokenId
    );
    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(
        address indexed owner,
        address indexed approved,
        uint256 indexed tokenId
    );
    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(
        address indexed owner,
        address indexed operator,
        bool approved
    );
    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);
    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);
    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;
    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;
    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;
    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;
    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId)
        external
        view
        returns (address operator);
    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator)
        external
        view
        returns (bool);
}
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @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);
}
// ERC721A Contracts v3.3.0
// Creator: Chiru Labs
pragma solidity ^0.8.4;
/**
 * @dev Interface of an ERC721A compliant contract.
 */
interface IERC721A is IERC721, IERC721Metadata {
    /**
     * 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.
     *
     * Burned tokens are calculated here, use `_totalMinted()` if you want to count just minted tokens.
     */
    function totalSupply() external view returns (uint256);
}
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override
        returns (bool)
    {
        return interfaceId == type(IERC165).interfaceId;
    }
}
// OpenZeppelin Contracts (last updated v4.6.0) (interfaces/IERC2981.sol)
pragma solidity ^0.8.0;
/**
 * @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 IERC2981 is IERC165 {
    /**
     * @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 paid in that same unit of exchange.
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice)
        external
        view
        returns (address receiver, uint256 royaltyAmount);
}
// OpenZeppelin Contracts (last updated v4.7.0) (token/common/ERC2981.sol)
pragma solidity ^0.8.0;
/**
 * @dev Implementation of the NFT Royalty Standard, a standardized way to retrieve royalty payment information.
 *
 * Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for
 * specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first.
 *
 * Royalty is specified as a fraction of sale price. {_feeDenominator} is overridable but defaults to 10000, meaning the
 * fee is specified in basis points by default.
 *
 * IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See
 * https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the EIP. Marketplaces are expected to
 * voluntarily pay royalties together with sales, but note that this standard is not yet widely supported.
 *
 * _Available since v4.5._
 */
abstract contract ERC2981 is IERC2981, ERC165 {
    struct RoyaltyInfo {
        address receiver;
        uint96 royaltyFraction;
    }
    RoyaltyInfo private _defaultRoyaltyInfo;
    mapping(uint256 => RoyaltyInfo) private _tokenRoyaltyInfo;
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(IERC165, ERC165)
        returns (bool)
    {
        return
            interfaceId == type(IERC2981).interfaceId ||
            super.supportsInterface(interfaceId);
    }
    /**
     * @inheritdoc IERC2981
     */
    function royaltyInfo(uint256 _tokenId, uint256 _salePrice)
        public
        view
        virtual
        override
        returns (address, uint256)
    {
        RoyaltyInfo memory royalty = _tokenRoyaltyInfo[_tokenId];
        if (royalty.receiver == address(0)) {
            royalty = _defaultRoyaltyInfo;
        }
        uint256 royaltyAmount = (_salePrice * royalty.royaltyFraction) /
            _feeDenominator();
        return (royalty.receiver, royaltyAmount);
    }
    /**
     * @dev The denominator with which to interpret the fee set in {_setTokenRoyalty} and {_setDefaultRoyalty} as a
     * fraction of the sale price. Defaults to 10000 so fees are expressed in basis points, but may be customized by an
     * override.
     */
    function _feeDenominator() internal pure virtual returns (uint96) {
        return 10000;
    }
    /**
     * @dev Sets the royalty information that all ids in this contract will default to.
     *
     * Requirements:
     *
     * - `receiver` cannot be the zero address.
     * - `feeNumerator` cannot be greater than the fee denominator.
     */
    function _setDefaultRoyalty(address receiver, uint96 feeNumerator)
        internal
        virtual
    {
        require(
            feeNumerator <= _feeDenominator(),
            "ERC2981: royalty fee will exceed salePrice"
        );
        require(receiver != address(0), "ERC2981: invalid receiver");
        _defaultRoyaltyInfo = RoyaltyInfo(receiver, feeNumerator);
    }
    /**
     * @dev Removes default royalty information.
     */
    function _deleteDefaultRoyalty() internal virtual {
        delete _defaultRoyaltyInfo;
    }
    /**
     * @dev Sets the royalty information for a specific token id, overriding the global default.
     *
     * Requirements:
     *
     * - `receiver` cannot be the zero address.
     * - `feeNumerator` cannot be greater than the fee denominator.
     */
    function _setTokenRoyalty(
        uint256 tokenId,
        address receiver,
        uint96 feeNumerator
    ) internal virtual {
        require(
            feeNumerator <= _feeDenominator(),
            "ERC2981: royalty fee will exceed salePrice"
        );
        require(receiver != address(0), "ERC2981: Invalid parameters");
        _tokenRoyaltyInfo[tokenId] = RoyaltyInfo(receiver, feeNumerator);
    }
    /**
     * @dev Resets royalty information for the token id back to the global default.
     */
    function _resetTokenRoyalty(uint256 tokenId) internal virtual {
        delete _tokenRoyaltyInfo[tokenId];
    }
}
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.
    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;
    uint256 private _status;
    constructor() {
        _status = _NOT_ENTERED;
    }
    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
        _;
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}
// ERC721A Contracts v3.3.0
// Creator: Chiru Labs
pragma solidity ^0.8.4;
/**
 * @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 ERC721A is Context, ERC165, IERC721A {
    using Address for address;
    using Strings 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;
    constructor(string memory name_, string memory symbol_) {
        _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(ERC165, IERC165)
        returns (bool)
    {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).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)
                if (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 virtual override {
        address owner = ERC721A.ownerOf(tokenId);
        if (to == owner) revert ApprovalToCurrentOwner();
        if (_msgSender() != owner)
            if (!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())
            if (!_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
            IERC721Receiver(to).onERC721Received(
                _msgSender(),
                from,
                tokenId,
                _data
            )
        returns (bytes4 retval) {
            return retval == IERC721Receiver(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 {}
}
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOperator`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;
    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );
    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }
    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }
    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }
    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }
    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }
    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        _transferOwnership(newOwner);
    }
    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}
pragma solidity ^0.8.9;
abstract contract Operable is Context {
    mapping(address => bool) _operators;
    modifier onlyOperator() {
        _checkOperatorRole(_msgSender());
        _;
    }
    function isOperator(address _operator) public view returns (bool) {
        return _operators[_operator];
    }
    function _grantOperatorRole(address _candidate) internal {
        require(
            !_operators[_candidate],
            string(
                abi.encodePacked(
                    "account ",
                    Strings.toHexString(uint160(_msgSender()), 20),
                    " is already has an operator role"
                )
            )
        );
        _operators[_candidate] = true;
    }
    function _revokeOperatorRole(address _candidate) internal {
        _checkOperatorRole(_candidate);
        delete _operators[_candidate];
    }
    function _checkOperatorRole(address _operator) internal view {
        require(
            _operators[_operator],
            string(
                abi.encodePacked(
                    "account ",
                    Strings.toHexString(uint160(_msgSender()), 20),
                    " is not an operator"
                )
            )
        );
    }
}
pragma solidity ^0.8.13;
interface IOperatorFilterRegistry {
    function isOperatorAllowed(address registrant, address operator)
        external
        view
        returns (bool);
    function register(address registrant) external;
    function registerAndSubscribe(address registrant, address subscription)
        external;
    function registerAndCopyEntries(
        address registrant,
        address registrantToCopy
    ) external;
    function unregister(address addr) external;
    function updateOperator(
        address registrant,
        address operator,
        bool filtered
    ) external;
    function updateOperators(
        address registrant,
        address[] calldata operators,
        bool filtered
    ) external;
    function updateCodeHash(
        address registrant,
        bytes32 codehash,
        bool filtered
    ) external;
    function updateCodeHashes(
        address registrant,
        bytes32[] calldata codeHashes,
        bool filtered
    ) external;
    function subscribe(address registrant, address registrantToSubscribe)
        external;
    function unsubscribe(address registrant, bool copyExistingEntries) external;
    function subscriptionOf(address addr) external returns (address registrant);
    function subscribers(address registrant)
        external
        returns (address[] memory);
    function subscriberAt(address registrant, uint256 index)
        external
        returns (address);
    function copyEntriesOf(address registrant, address registrantToCopy)
        external;
    function isOperatorFiltered(address registrant, address operator)
        external
        returns (bool);
    function isCodeHashOfFiltered(address registrant, address operatorWithCode)
        external
        returns (bool);
    function isCodeHashFiltered(address registrant, bytes32 codeHash)
        external
        returns (bool);
    function filteredOperators(address addr)
        external
        returns (address[] memory);
    function filteredCodeHashes(address addr)
        external
        returns (bytes32[] memory);
    function filteredOperatorAt(address registrant, uint256 index)
        external
        returns (address);
    function filteredCodeHashAt(address registrant, uint256 index)
        external
        returns (bytes32);
    function isRegistered(address addr) external returns (bool);
    function codeHashOf(address addr) external returns (bytes32);
}
pragma solidity ^0.8.13;
/**
 * @title  OperatorFilterer
 * @notice Abstract contract whose constructor automatically registers and optionally subscribes to or copies another
 *         registrant's entries in the OperatorFilterRegistry.
 * @dev    This smart contract is meant to be inherited by token contracts so they can use the following:
 *         - `onlyAllowedOperator` modifier for `transferFrom` and `safeTransferFrom` methods.
 *         - `onlyAllowedOperatorApproval` modifier for `approve` and `setApprovalForAll` methods.
 */
abstract contract OperatorFilterer {
    error OperatorNotAllowed(address operator);
    bool public operatorFilteringEnabled = true;
    IOperatorFilterRegistry public constant OPERATOR_FILTER_REGISTRY =
        IOperatorFilterRegistry(0x000000000000AAeB6D7670E522A718067333cd4E);
    constructor(address subscriptionOrRegistrantToCopy, bool subscribe) {
        // If an inheriting token contract is deployed to a network without the registry deployed, the modifier
        // will not revert, but the contract will need to be registered with the registry once it is deployed in
        // order for the modifier to filter addresses.
        if (address(OPERATOR_FILTER_REGISTRY).code.length > 0) {
            if (subscribe) {
                OPERATOR_FILTER_REGISTRY.registerAndSubscribe(
                    address(this),
                    subscriptionOrRegistrantToCopy
                );
            } else {
                if (subscriptionOrRegistrantToCopy != address(0)) {
                    OPERATOR_FILTER_REGISTRY.registerAndCopyEntries(
                        address(this),
                        subscriptionOrRegistrantToCopy
                    );
                } else {
                    OPERATOR_FILTER_REGISTRY.register(address(this));
                }
            }
        }
    }
    modifier onlyAllowedOperator(address from) virtual {
        // Check registry code length to facilitate testing in environments without a deployed registry.
        if (
            address(OPERATOR_FILTER_REGISTRY).code.length > 0 &&
            operatorFilteringEnabled
        ) {
            // Allow spending tokens from addresses with balance
            // Note that this still allows listings and marketplaces with escrow to transfer tokens if transferred
            // from an EOA.
            if (from == msg.sender) {
                _;
                return;
            }
            if (
                !OPERATOR_FILTER_REGISTRY.isOperatorAllowed(
                    address(this),
                    msg.sender
                )
            ) {
                revert OperatorNotAllowed(msg.sender);
            }
        }
        _;
    }
    modifier onlyAllowedOperatorApproval(address operator) virtual {
        // Check registry code length to facilitate testing in environments without a deployed registry.
        if (
            address(OPERATOR_FILTER_REGISTRY).code.length > 0 &&
            operatorFilteringEnabled
        ) {
            if (
                !OPERATOR_FILTER_REGISTRY.isOperatorAllowed(
                    address(this),
                    operator
                )
            ) {
                revert OperatorNotAllowed(operator);
            }
        }
        _;
    }
}
pragma solidity ^0.8.13;
/**
 * @title  DefaultOperatorFilterer
 * @notice Inherits from OperatorFilterer and automatically subscribes to the default OpenSea subscription.
 */
abstract contract DefaultOperatorFilterer is OperatorFilterer {
    address constant DEFAULT_SUBSCRIPTION =
        address(0x3cc6CddA760b79bAfa08dF41ECFA224f810dCeB6);
    constructor() OperatorFilterer(DEFAULT_SUBSCRIPTION, true) {}
}
interface IERC721ANSK is IERC721A {
    function tokenURI(uint256 _tokenId) external view returns (string memory);
    function walletOfOwner(address _address)
        external
        view
        returns (uint256[] memory);
}
pragma solidity ^0.8.7;
/*
┏━━┳━━┳━━┳━┳━━┳┳━┳━┳┓┏━━┳━━┳━┳┳┳━┳━━┓
┃━━╋┓┏┫┏┓┃╋┣┓┏┫┃╋┃┃┃┃┗┓┏┻┃┃┫┏┫┏┫┳┻┓┏┛
┣━━┃┃┃┃┣┫┃┓┫┃┣┫┃┏┫┃┃┃╋┃┃┏┃┃┫┗┫┗┫┻┓┃┃
┗━━┛┗┛┗┛┗┻┻┛┗┻━┻┛┗┻━┛╋┗┛┗━━┻━┻┻┻━┛┗┛
STARTJPN Ticket
*/
contract StartTicket is
    Ownable,
    ERC721A,
    ReentrancyGuard,
    MerkleProof,
    ERC2981,
    DefaultOperatorFilterer,
    Operable
{
    //Project Settings
    uint256 public wlMintPrice = 0.0 ether;
    uint256 public psMintPrice = 0.003 ether;
    uint256 public maxMintsPerWL = 1;
    uint256 public maxMintsPerPS = 1;
    uint256 public maxSupply = 50000;
    uint256 public mintable = 5000;
    address payable internal _withdrawWallet;
    uint256 public maxReq = 50000;
    uint256 public maxQues = 50000;
    uint256 public phaseNum = 1;
    uint256 public phaseNumQ = 1;
    uint256 public nowCount;
    uint256 public nowCountQues;
    uint256 public phaseRequire = 1;
    address public baseAddress;
    IERC721ANSK baseContract;
    //URI
    string internal hiddenURI;
    string internal _baseTokenURI;
    string public _baseExtension = ".json";
    //flags
    bool public isWlSaleEnabled;
    bool public isPublicSaleEnabled;
    bool public isPublicMPSaleEnabled;
    bool public isPublicBOSaleEnabled;
    bool public revealed = false;
    bool public burnWriteEnable = false;
    bool public burnWriteRemoveEnable = false;
    bool public burnWriteQEnable = false;
    bool public requireBaseHold = false;
    address public deployer;
    //mint records.
    mapping(address => uint256) internal _wlMinted;
    mapping(address => uint256) internal _psMinted;
    uint256[] public _requests;
    mapping(address => uint256) internal _requestsAddress;
    mapping(uint256 => uint256) internal _requestedId;
    uint256[] public _quests;
    address[] public _questsAddress;
    mapping(uint256 => uint256) public questRequire;
    mapping(uint256 => uint256) public requestRequire;
    mapping(uint256 => uint256) public questMax;
    mapping(uint256 => mapping(uint256 => uint256)) public questHistory;
    constructor(
        address _royaltyReceiver,
        uint96 _royaltyFraction,
        address _contractAddress
    ) ERC721A("STARTJPN Ticket", "STK") {
        deployer = msg.sender;
        baseAddress = _contractAddress;
        // _withdrawWallet = payable(deployer);
        _grantOperatorRole(msg.sender);
        _setDefaultRoyalty(_royaltyReceiver, _royaltyFraction);
        baseContract = IERC721ANSK(_contractAddress);
    }
    function setBaseContract(address _contractAddress) public onlyOperator {
        baseContract = IERC721ANSK(_contractAddress);
        baseAddress = _contractAddress;
    }
    //start from 1.adjust.
    function _startTokenId() internal view virtual override returns (uint256) {
        return 1;
    }
    //set Default Royalty._feeNumerator 500 = 5% Royalty
    function setDefaultRoyalty(address _receiver, uint96 _feeNumerator)
        external
        virtual
        onlyOperator
    {
        _setDefaultRoyalty(_receiver, _feeNumerator);
    }
    //for ERC2981
    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC721A, ERC2981)
        returns (bool)
    {
        return super.supportsInterface(interfaceId);
    }
    //for ERC2981 Opensea
    function contractURI() external view virtual returns (string memory) {
        return _formatContractURI();
    }
    //make contractURI
    function _formatContractURI() internal view returns (string memory) {
        (address receiver, uint256 royaltyFraction) = royaltyInfo(
            0,
            _feeDenominator()
        ); //tokenid=0
        return
            string(
                abi.encodePacked(
                    "data:application/json;base64,",
                    Base64.encode(
                        bytes(
                            abi.encodePacked(
                                '{"seller_fee_basis_points":',
                                Strings.toString(royaltyFraction),
                                ', "fee_recipient":"',
                                Strings.toHexString(
                                    uint256(uint160(receiver)),
                                    20
                                ),
                                '"}'
                            )
                        )
                    )
                )
            );
    }
    //set owner's wallet.withdraw to this wallet.only owner.
    function setWithdrawWallet(address _owner) external virtual onlyOperator {
        _withdrawWallet = payable(_owner);
    }
    function setDeployer(address _deployer) external virtual onlyOperator {
        deployer = _deployer;
    }
    //set maxSupply.only owner.
    function setMaxSupply(uint256 _maxSupply) external virtual onlyOperator {
        require(totalSupply() <= _maxSupply, "Lower than _currentIndex.");
        maxSupply = _maxSupply;
    }
    //set mintable.only owner.
    function setMintable(uint256 _mintable) external virtual onlyOperator {
        require(totalSupply() <= _mintable, "Lower than _currentIndex.");
        mintable = _mintable;
    }
    // SET PRICES.
    function setWlPrice(uint256 newPrice) external virtual onlyOperator {
        wlMintPrice = newPrice;
    }
    function setPsPrice(uint256 newPrice) external virtual onlyOperator {
        psMintPrice = newPrice;
    }
    //set reveal.only owner.
    function setReveal(bool newRevealStatus) external virtual onlyOperator {
        revealed = newRevealStatus;
    }
    //return _isRevealed()
    function _isRevealed() internal view virtual returns (bool) {
        return revealed;
    }
    // GET MINTED COUNT.
    function wlMinted(address _address)
        external
        view
        virtual
        returns (uint256)
    {
        return _wlMinted[_address];
    }
    function psMinted(address _address)
        external
        view
        virtual
        returns (uint256)
    {
        return _psMinted[_address];
    }
    // SET MAX MINTS.
    function setWlMaxMints(uint256 _max) external virtual onlyOperator {
        maxMintsPerWL = _max;
    }
    function setPsMaxMints(uint256 _max) external virtual onlyOperator {
        maxMintsPerPS = _max;
    }
    // SET SALES ENABLE.
    function setWhitelistSaleEnable(bool bool_) external virtual onlyOperator {
        isWlSaleEnabled = bool_;
    }
    function setPublicSaleEnable(bool bool_) external virtual onlyOperator {
        isPublicSaleEnabled = bool_;
    }
    function setPublicMPSaleEnable(bool bool_) external virtual onlyOperator {
        isPublicMPSaleEnabled = bool_;
    }
    function setPublicBOSaleEnable(bool bool_) external virtual onlyOperator {
        isPublicBOSaleEnabled = bool_;
    }
    // SET MERKLE ROOT.
    function setWlMerkleRoot(bytes32 merkleRoot_)
        external
        virtual
        onlyOperator
    {
        _setWlMerkleRoot(merkleRoot_);
    }
        // SET MERKLE ROOT.
    function setPWlMerkleRoot(bytes32 merkleRoot_)
        external
        virtual
        onlyOperator
    {
        _setPWlMerkleRoot(merkleRoot_);
    }
    //set HiddenBaseURI.only owner.
    function setHiddenURI(string memory uri_) external virtual onlyOperator {
        hiddenURI = uri_;
    }
    //return _currentIndex
    function getCurrentIndex() external view virtual returns (uint256) {
        return _currentIndex;
    }
    //set BaseURI at after reveal. only owner.
    function setBaseURI(string memory uri_) external virtual onlyOperator {
        _baseTokenURI = uri_;
    }
    function setBaseExtension(string memory _newBaseExtension)
        external
        onlyOperator
    {
        _baseExtension = _newBaseExtension;
    }
    //retuen BaseURI.internal.
    function _currentBaseURI() internal view returns (string memory) {
        return _baseTokenURI;
    }
    function tokenURI(uint256 _tokenId)
        public
        view
        virtual
        override
        returns (string memory)
    {
        require(_exists(_tokenId), "URI query for nonexistent token");
        if (_isRevealed()) {
            return
                string(
                    abi.encodePacked(
                        _currentBaseURI(),
                        Strings.toString(_tokenId),
                        _baseExtension
                    )
                );
        }
        return hiddenURI;
    }
    //owner mint.transfer to _address.only owner.
    function ownerMint(uint256 _amount, address _address)
        external
        virtual
        onlyOperator
    {
        require((_amount + totalSupply()) <= (maxSupply), "No more NFTs");
        _safeMint(_address, _amount);
    }
    //WL mint.
    function whitelistMint(
        uint256 _amount,
        uint256 wlcount,
        bytes32[] memory proof_
    ) external payable virtual nonReentrant {
        require(isWlSaleEnabled, "whitelistMint is Paused");
        require(
            isWhitelisted(msg.sender, wlcount, proof_),
            "You are not whitelisted!"
        );
        require(wlcount > 0, "You have no WL!");
        require(wlcount >= _amount, "whitelistMint: Over max mints per wallet");
        require(
            wlcount >= _wlMinted[msg.sender] + _amount,
            "You have no whitelistMint left"
        );
        // require(msg.value == wlMintPrice * _amount, "ETH value is not correct");
        require((_amount + totalSupply()) <= (mintable), "No more NFTs");
        require((_amount + totalSupply()) <= (maxSupply), "No more NFTs");
        _wlMinted[msg.sender] += _amount;
        _safeMint(msg.sender, _amount);
    }
    //Public mint.
    function publicMint(uint256 _amount) external payable virtual nonReentrant {
        require(isPublicSaleEnabled, "publicMint is Paused");
        require(
            maxMintsPerPS >= _amount,
            "publicMint: Over max mints per wallet"
        );
        require(
            maxMintsPerPS >= _psMinted[msg.sender] + _amount,
            "You have no publicMint left"
        );
        require(msg.value == psMintPrice * _amount, "ETH value is not correct");
        require((_amount + totalSupply()) <= (mintable), "No more NFTs");
        require((_amount + totalSupply()) <= (maxSupply), "No more NFTs");
        _psMinted[msg.sender] += _amount;
        _safeMint(msg.sender, _amount);
    }
    //Public mint.
    function publicMintMP(uint256 _amount, bytes32[] memory proof_)
        external
        payable
        virtual
        nonReentrant
    {
        require(isPublicMPSaleEnabled, "publicMPMint is Paused");
        require(isPWhitelisted(msg.sender, proof_), "You are not whitelisted!");
        require(
            maxMintsPerPS >= _amount,
            "publicMint: Over max mints per wallet"
        );
        require(
            maxMintsPerPS >= _psMinted[msg.sender] + _amount,
            "You have no publicMint left"
        );
        require(msg.value == psMintPrice * _amount, "ETH value is not correct");
        require((_amount + totalSupply()) <= (mintable), "No more NFTs");
        require((_amount + totalSupply()) <= (maxSupply), "No more NFTs");
        _psMinted[msg.sender] += _amount;
        _safeMint(msg.sender, _amount);
    }
    //Public mint.
    function publicMintBO(uint256 _amount)
        external
        payable
        virtual
        nonReentrant
    {
        require(isPublicBOSaleEnabled, "publicBOMint is Paused");
        require(
            0 <= baseContract.balanceOf(msg.sender),
            "you not have Base NFT"
        );
        require(
            maxMintsPerPS >= _amount,
            "publicMint: Over max mints per wallet"
        );
        require(
            maxMintsPerPS >= _psMinted[msg.sender] + _amount,
            "You have no publicMint left"
        );
        require(msg.value == psMintPrice * _amount, "ETH value is not correct");
        require((_amount + totalSupply()) <= (mintable), "No more NFTs");
        require((_amount + totalSupply()) <= (maxSupply), "No more NFTs");
        _psMinted[msg.sender] += _amount;
        _safeMint(msg.sender, _amount);
    }
    //burn
    function burn(uint256 tokenId) external virtual {
        _burn(tokenId, true);
    }
    //widraw ETH from this contract.only owner.
    function withdraw() external payable virtual onlyOperator nonReentrant {
        // This will payout the owner 100% of the contract balance.
        // Do not remove this otherwise you will not be able to withdraw the funds.
        // =============================================================================
        bool os;
        if (_withdrawWallet != address(0)) {
            //if _withdrawWallet has.
            (os, ) = payable(_withdrawWallet).call{
                value: address(this).balance
            }("");
        } else {
            (os, ) = payable(owner()).call{value: address(this).balance}("");
        }
        require(os);
        // =============================================================================
    }
    //return wallet owned tokenids.
    function walletOfOwner(address _address)
        external
        view
        virtual
        returns (uint256[] memory)
    {
        uint256 ownerTokenCount = balanceOf(_address);
        uint256[] memory tokenIds = new uint256[](ownerTokenCount);
        //search from all tonkenid. so spend high gas values.attention.
        uint256 tokenindex = 0;
        for (uint256 i = _startTokenId(); i < _currentIndex; i++) {
            if (_address == this.tryOwnerOf(i)) tokenIds[tokenindex++] = i;
        }
        return tokenIds;
    }
    //return wallet owned tokenids.
    function walletOfOwnerBase(address _address)
        external
        view
        virtual
        returns (uint256[] memory)
    {
        return baseContract.walletOfOwner(_address);
    }
    function tokenURIBase(uint256 _tokenId)
        public
        view
        virtual
        returns (string memory)
    {
        return baseContract.tokenURI(_tokenId);
    }
    function balanceOfBase(address owner) public view returns (uint256) {
        return baseContract.balanceOf(owner);
    }
    //return wallet owned tokenids.
    function walletOfOwnerByIndex(address _address, uint256 _index)
        external
        view
        virtual
        returns (uint256)
    {
        uint256 tokenId;
        //search from all tonkenid. so spend high gas values.attention.
        uint256 tokenindex = 0;
        for (uint256 i = _startTokenId(); i < _currentIndex; i++) {
            if (_address == this.tryOwnerOf(i)) {
                tokenId = i;
                if (_index == tokenindex) {
                    break;
                }
                tokenindex++;
            }
        }
        return tokenId;
    }
    //try catch vaersion ownerOf. support burned tokenid.
    function tryOwnerOf(uint256 tokenId)
        external
        view
        virtual
        returns (address)
    {
        try this.ownerOf(tokenId) returns (address _address) {
            return (_address);
        } catch {
            return (address(0)); //return 0x0 if error.
        }
    }
    //set setBurnWriteEnable.only owner.
    function setBurnWriteEnable(bool _newbwStatus)
        external
        virtual
        onlyOperator
    {
        burnWriteEnable = _newbwStatus;
    }
    //set setBurnWriteRemoveEnable.only owner.
    function setBurnWriteRemoveEnable(bool _newbwStatus)
        external
        virtual
        onlyOperator
    {
        burnWriteRemoveEnable = _newbwStatus;
    }
    //set setBurnWriteEnable.only owner.
    function setBurnWriteQEnable(bool _newbwStatus)
        external
        virtual
        onlyOperator
    {
        burnWriteQEnable = _newbwStatus;
    }
    //set nowNum.only owner.
    function resetPhase() external virtual onlyOperator {
        delete _requests;
        nowCount = 0;
        phaseNum++;
    }
    //set nowNum.only owner.
    function setMaxReq(uint256 _maxReq) external virtual onlyOperator {
        maxReq = _maxReq;
    }
    //burn.and.write
    function burnWrite(uint256 _tokenId, uint256 _burnId)
        external
        virtual
        nonReentrant
    {
        require(burnWriteEnable, "burnWrite is disabled");
        require(
            msg.sender == baseContract.ownerOf(_tokenId),
            "you are not owner.Base"
        );
        require(msg.sender == ownerOf(_burnId), "you are not owner.Ticket");
        require(
            _requestedId[_tokenId] != phaseNum ||
                _requestsAddress[msg.sender] != phaseNum,
            "you have writed in past."
        );
        // require(balanceOf(msg.sender) > 0,"you not have ticket.");
        require(maxReq > nowCount, "phase exeed.");
        _setRequest(_tokenId);
        _burn(_burnId, true);
    }
    //burn.and.write
    function burnWriteMulti(uint256 _tokenId, uint256[] memory _burnIds)
        external
        virtual
        nonReentrant
    {
        require(burnWriteEnable, "burnWrite is disabled");
        require(
            msg.sender == baseContract.ownerOf(_tokenId),
            "you are not owner.Base"
        );
        require(
            _burnIds.length <= balanceOf(msg.sender),
            "you not have amount"
        );
        require(hasToken(msg.sender, _burnIds), "you not have tokens");
        require(
            _requestedId[_tokenId] != phaseNum ||
                _requestsAddress[msg.sender] != phaseNum,
            "you have writed in past."
        );
        require(
            phaseRequire == _burnIds.length ||
                ((phaseRequire == 0 || phaseRequire == 1) &&
                    _burnIds.length == 1),
            "quantity is wrong"
        );
        require(maxReq > nowCount, "phase exeed.");
        _setRequest(_tokenId);
        multiBurn(msg.sender, _burnIds);
    }
    //burn.and.write
    function burnRemoveWrite(uint256 _tokenId) external virtual nonReentrant {
        require(burnWriteRemoveEnable, "burnWriteRemove is disabled");
        require(
            msg.sender == baseContract.ownerOf(_tokenId),
            "you are not owner.Base"
        );
        _removeRequest(_tokenId);
    }
    function _setRequest(uint256 _tokenId) internal virtual {
        _requests.push(_tokenId);
        _requestsAddress[msg.sender] = phaseNum;
        _requestedId[_tokenId] = phaseNum;
        nowCount++;
    }
    function _removeRequest(uint256 _tokenId) internal virtual {
        for (uint256 i = 0; i < _requests.length; i++) {
            if (_tokenId == _requests[i]) {
                delete _requests[i];
                break;
            }
        }
    }
    function _getRequest() external view virtual returns (uint256[] memory) {
        return _requests;
    }
    //set nowNum.only owner.
    function resetPhaseQues() external virtual onlyOperator {
        delete _quests;
        delete _questsAddress;
        nowCountQues = 0;
        phaseNumQ++;
    }
    //set nowNum.only owner.
    function setMaxQues(uint256 _maxQues) external virtual onlyOperator {
        maxQues = _maxQues;
    }
    //set setMaxQuesByUnit.only owner.
    function setQuestMaxByUnit(uint256 _quesId, uint256 _maxQues)
        external
        virtual
        onlyOperator
    {
        questMax[_quesId] = _maxQues;
    }
    //set nowNum.only owner.
    function setQuestRequire(uint256 _questId, uint256 _quantity)
        external
        virtual
        onlyOperator
    {
        questRequire[_questId] = _quantity;
    }
    //set nowNum.only owner.
    function setRequestRequire(uint256 _requestId, uint256 _quantity)
        external
        virtual
        onlyOperator
    {
        requestRequire[_requestId] = _quantity;
    }
    //burn.and.write
    function burnWriteQues(uint256 _quesId, uint256 burnId)
        external
        virtual
        nonReentrant
    {
        require(burnWriteQEnable, "burnWriteQ is disabled");
        require(msg.sender == ownerOf(burnId), "you are not owner");
        require(maxQues > nowCountQues, "phase exeed.");
        require(
            questMax[_quesId] > questHistory[phaseNumQ][_quesId] ||
                questMax[_quesId] == 0,
            "ques exeed."
        );
        require(
            requireBaseHold == false || 0 <= baseContract.balanceOf(msg.sender),
            "you not have Base NFT"
        );
        require(
            questRequire[_quesId] == 0 || questRequire[_quesId] == 1,
            "quantity is wrong"
        );
        _setQuest(_quesId);
        _burn(burnId, true);
    }
    //burn.and.write
    function burnWriteMultiQues(uint256 _quesId, uint256[] memory _burnIds)
        external
        virtual
        nonReentrant
    {
        require(burnWriteQEnable, "burnWriteQ is disabled");
        require(maxQues > nowCountQues, "phase exeed.");
        require(
            _burnIds.length <= balanceOf(msg.sender),
            "you not have amount"
        );
        require(
            questMax[_quesId] > questHistory[phaseNumQ][_quesId] ||
                questMax[_quesId] == 0,
            "ques exeed."
        );
        require(
            requireBaseHold == false || 0 <= baseContract.balanceOf(msg.sender),
            "you not have Base NFT"
        );
        require(hasToken(msg.sender, _burnIds), "you not have tokens");
        require(
            questRequire[_quesId] == _burnIds.length ||
                ((questRequire[_quesId] == 0 || questRequire[_quesId] == 1) &&
                    _burnIds.length == 1),
            "quantity is wrong"
        );
        _setQuest(_quesId);
        multiBurn(msg.sender, _burnIds);
    }
    function hasToken(address _address, uint256[] memory _tokenIds)
        public
        view
        returns (bool)
    {
        bool has = true;
        for (uint256 i = 0; i < _tokenIds.length; i++) {
            if (_address != this.tryOwnerOf(_tokenIds[i])) {
                has = false;
                break;
            }
        }
        return has;
    }
    //multi.burn
    function multiBurn(address _address, uint256[] memory _burnIds)
        internal
        virtual
    {
        //search from all tonkenid. so spend high gas values.attention.
        uint256 countBurn = 0;
        for (uint256 i = 0; i < _burnIds.length; i++) {
            if (_address == this.tryOwnerOf(_burnIds[i])) {
                _burn(_burnIds[i], true);
                countBurn++;
            }
        }
    }
    function _setQuest(uint256 _quesId) internal virtual {
        _quests.push(_quesId);
        _questsAddress.push(msg.sender);
        questHistory[phaseNumQ][_quesId]++;
        nowCountQues++;
    }
    function _getQuest() external view virtual returns (uint256[] memory) {
        return _quests;
    }
    function _getQuestAddress()
        external
        view
        virtual
        returns (address[] memory)
    {
        return _questsAddress;
    }
    //return wallet owned questIds.
    function walletOfQuests(address _address)
        external
        view
        virtual
        returns (uint256[] memory)
    {
        uint256 countindex = 0;
        for (uint256 i = 0; i < _questsAddress.length; i++) {
            if (_address == _questsAddress[i]) countindex++;
        }
        uint256[] memory questIds = new uint256[](countindex);
        uint256 questIndex = 0;
        for (uint256 i = 0; i < _questsAddress.length; i++) {
            if (_address == _questsAddress[i])
                questIds[questIndex++] = _quests[i];
        }
        return questIds;
    }
    //return wallet owned questIds.
    function addressByQuest(uint256 _quesId)
        external
        view
        virtual
        returns (address[] memory)
    {
        uint256 countindex = 0;
        for (uint256 i = 0; i < _quests.length; i++) {
            if (_quesId == _quests[i]) countindex++;
        }
        address[] memory addressesOfId = new address[](countindex);
        uint256 questIndex = 0;
        for (uint256 i = 0; i < _quests.length; i++) {
            if (_quesId == _quests[i])
                addressesOfId[questIndex++] = _questsAddress[i];
        }
        return addressesOfId;
    }
    /**
     * @notice Set the state of the OpenSea operator filter
     * @param value Flag indicating if the operator filter should be applied to transfers and approvals
     */
    function setOperatorFilteringEnabled(bool value) external onlyOperator {
        operatorFilteringEnabled = value;
    }
    function setApprovalForAll(address operator, bool approved)
        public
        override
        onlyAllowedOperatorApproval(operator)
    {
        super.setApprovalForAll(operator, approved);
    }
    function approve(address operator, uint256 tokenId)
        public
        override
        onlyAllowedOperatorApproval(operator)
    {
        super.approve(operator, tokenId);
    }
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public override onlyAllowedOperator(from) {
        super.transferFrom(from, to, tokenId);
    }
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public override onlyAllowedOperator(from) {
        super.safeTransferFrom(from, to, tokenId);
    }
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory data
    ) public override onlyAllowedOperator(from) {
        super.safeTransferFrom(from, to, tokenId, data);
    }
    /**
        @dev Operable Role
     */
    function grantOperatorRole(address _candidate) external onlyOwner {
        _grantOperatorRole(_candidate);
    }
    function revokeOperatorRole(address _candidate) external onlyOwner {
        _revokeOperatorRole(_candidate);
    }
}
//CODE.BY.FRICKLIK