// SPDX-License-Identifier: MIT

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);

    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 {
    // 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) {
      _checkFilterOperator(msg.sender);
    }
    _;
  }

    modifier onlyAllowedOperatorApproval(address operator) virtual {
    _checkFilterOperator(operator);
    _;
  }

  function _checkFilterOperator(address operator) internal view virtual {
    // Check registry code length to facilitate testing in environments without a deployed registry.
    if (address(OPERATOR_FILTER_REGISTRY).code.length > 0) {
      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) { }
}

pragma solidity ^ 0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
  function _msgSender() internal view virtual returns(address) {
    return msg.sender;
  }

  function _msgData() internal view virtual returns(bytes calldata) {
    return msg.data;
  }
}

// File: @openzeppelin/contracts/access/Ownable.sol

// 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
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(
  address indexed previousOwner,
  address indexed newOwner
);

  /**
   * @dev Initializes the contract setting the deployer as the initial owner.
   */
  constructor() {
    _transferOwnership(_msgSender());
  }

    /**
     * @dev 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 ^ 0.8.4;

/**
 * @dev Interface of ERC721A.
 */
interface IERC721A {
    /**
     * The caller must own the token or be an approved operator.
     */
    error ApprovalCallerNotOwnerNorApproved();

    /**
     * The token does not exist.
     */
    error ApprovalQueryForNonexistentToken();

    /**
     * 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();

    /**
     * The `quantity` minted with ERC2309 exceeds the safety limit.
     */
    error MintERC2309QuantityExceedsLimit();

    /**
     * The `extraData` cannot be set on an unintialized ownership slot.
     */
    error OwnershipNotInitializedForExtraData();

    // =============================================================
    //                            STRUCTS
    // =============================================================

    struct TokenOwnership {
        // The address of the owner.
        address addr;
        // Stores the start time of ownership with minimal overhead for tokenomics.
        uint64 startTimestamp;
        // Whether the token has been burned.
        bool burned;
        // Arbitrary data similar to `startTimestamp` that can be set via {_extraData}.
        uint24 extraData;
}

// =============================================================
//                         TOKEN COUNTERS
// =============================================================

/**
 * @dev Returns the total number of tokens in existence.
 * Burned tokens will reduce the count.
 * To get the total number of tokens minted, please see {_totalMinted}.
 */
function totalSupply() external view returns(uint256);

// =============================================================
//                            IERC165
// =============================================================

/**
 * @dev Returns true if this contract implements the interface defined by
 * `interfaceId`. See the corresponding
 * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
 * to learn more about how these ids are created.
 *
 * This function call must use less than 30000 gas.
 */
function supportsInterface(bytes4 interfaceId) external view returns(bool);

    // =============================================================
    //                            IERC721
    // =============================================================

    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(
  address indexed from,
  address indexed to,
  uint256 indexed tokenId
);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(
  address indexed owner,
  address indexed approved,
  uint256 indexed tokenId
);

    /**
     * @dev Emitted when `owner` enables or disables
     * (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(
  address indexed owner,
  address indexed operator,
  bool approved
);

/**
 * @dev Returns the number of tokens in `owner`'s account.
 */
function balanceOf(address owner) external view returns(uint256 balance);

/**
 * @dev Returns the owner of the `tokenId` token.
 *
 * Requirements:
 *
 * - `tokenId` must exist.
 */
function ownerOf(uint256 tokenId) external view returns(address owner);

/**
 * @dev Safely transfers `tokenId` token from `from` to `to`,
 * checking first that contract recipients are aware of the ERC721 protocol
 * to prevent tokens from being forever locked.
 *
 * Requirements:
 *
 * - `from` cannot be the zero address.
 * - `to` cannot be the zero address.
 * - `tokenId` token must exist and be owned by `from`.
 * - If the caller is not `from`, it must be have been allowed to move
 * this token by either {approve} or {setApprovalForAll}.
 * - If `to` refers to a smart contract, it must implement
 * {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
 *
 * Emits a {Transfer} event.
 */
function safeTransferFrom(
  address from,
  address to,
  uint256 tokenId,
  bytes calldata data
) external payable;

/**
 * @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`.
 */
function safeTransferFrom(
  address from,
  address to,
  uint256 tokenId
) external payable;

/**
 * @dev Transfers `tokenId` 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 payable;

/**
 * @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 payable;

/**
 * @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);

// =============================================================
//                        IERC721Metadata
// =============================================================

/**
 * @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);

    // =============================================================
    //                           IERC2309
    // =============================================================

    /**
     * @dev Emitted when tokens in `fromTokenId` to `toTokenId`
     * (inclusive) is transferred from `from` to `to`, as defined in the
     * [ERC2309](https://eips.ethereum.org/EIPS/eip-2309) standard.
     *
     * See {_mintERC2309} for more details.
     */
    event ConsecutiveTransfer(
  uint256 indexed fromTokenId,
  uint256 toTokenId,
  address indexed from,
  address indexed to
);
}

pragma solidity ^ 0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
  enum Rounding {
    Down, // Toward negative infinity
    Up, // Toward infinity
    Zero // Toward zero
  }

  /**
   * @dev Returns the largest of two numbers.
   */
  function max(uint256 a, uint256 b) internal pure returns(uint256) {
    return a > b ? a : b;
  }

  /**
   * @dev Returns the smallest of two numbers.
   */
  function min(uint256 a, uint256 b) internal pure returns(uint256) {
    return a < b ? a : b;
  }

  /**
   * @dev Returns the average of two numbers. The result is rounded towards
   * zero.
   */
  function average(uint256 a, uint256 b) internal pure returns(uint256) {
    // (a + b) / 2 can overflow.
    return (a & b) + (a ^ b) / 2;
  }

  /**
   * @dev Returns the ceiling of the division of two numbers.
   *
   * This differs from standard division with `/` in that it rounds up instead
   * of rounding down.
   */
  function ceilDiv(uint256 a, uint256 b) internal pure returns(uint256) {
    // (a + b - 1) / b can overflow on addition, so we distribute.
    return a == 0 ? 0 : (a - 1) / b + 1;
  }

  /**
   * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
   * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
   * with further edits by Uniswap Labs also under MIT license.
   */
  function mulDiv(
    uint256 x,
    uint256 y,
    uint256 denominator
  ) internal pure returns(uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
        let mm:= mulmod(x, y, not(0))
        prod0:= mul(x, y)
        prod1:= sub(sub(mm, prod0), lt(mm, prod0))
      }

      // Handle non-overflow cases, 256 by 256 division.
      if (prod1 == 0) {
        return prod0 / denominator;
      }

      // Make sure the result is less than 2^256. Also prevents denominator == 0.
      require(denominator > prod1);

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
        // Compute remainder using mulmod.
        remainder:= mulmod(x, y, denominator)

        // Subtract 256 bit number from 512 bit number.
        prod1:= sub(prod1, gt(remainder, prod0))
        prod0:= sub(prod0, remainder)
      }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
        // Divide denominator by twos.
        denominator:= div(denominator, twos)

        // Divide [prod1 prod0] by twos.
        prod0:= div(prod0, twos)

        // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
        twos:= add(div(sub(0, twos), twos), 1)
      }

      // Shift in bits from prod1 into prod0.
      prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

      // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
      // in modular arithmetic, doubling the correct bits in each step.
      inverse *= 2 - denominator * inverse; // inverse mod 2^8
      inverse *= 2 - denominator * inverse; // inverse mod 2^16
      inverse *= 2 - denominator * inverse; // inverse mod 2^32
      inverse *= 2 - denominator * inverse; // inverse mod 2^64
      inverse *= 2 - denominator * inverse; // inverse mod 2^128
      inverse *= 2 - denominator * inverse; // inverse mod 2^256

      // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
      // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
      // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
      // is no longer required.
      result = prod0 * inverse;
      return result;
    }
  }

  /**
   * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
   */
  function mulDiv(
    uint256 x,
    uint256 y,
    uint256 denominator,
    Rounding rounding
  ) internal pure returns(uint256) {
        uint256 result = mulDiv(x, y, denominator);
    if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
      result += 1;
    }
    return result;
  }

  /**
   * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
   *
   * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
   */
  function sqrt(uint256 a) internal pure returns(uint256) {
    if (a == 0) {
      return 0;
    }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
      result = (result + a / result) >> 1;
      result = (result + a / result) >> 1;
      result = (result + a / result) >> 1;
      result = (result + a / result) >> 1;
      result = (result + a / result) >> 1;
      result = (result + a / result) >> 1;
      result = (result + a / result) >> 1;
      return min(result, a / result);
    }
  }

  /**
   * @notice Calculates sqrt(a), following the selected rounding direction.
   */
  function sqrt(uint256 a, Rounding rounding)
  internal
  pure
  returns(uint256)
  {
        unchecked {
            uint256 result = sqrt(a);
      return
      result +
        (rounding == Rounding.Up && result * result < a ? 1 : 0);
    }
  }

  /**
   * @dev Return the log in base 2, rounded down, of a positive value.
   * Returns 0 if given 0.
   */
  function log2(uint256 value) internal pure returns(uint256) {
        uint256 result = 0;
        unchecked {
      if (value >> 128 > 0) {
        value >>= 128;
        result += 128;
      }
      if (value >> 64 > 0) {
        value >>= 64;
        result += 64;
      }
      if (value >> 32 > 0) {
        value >>= 32;
        result += 32;
      }
      if (value >> 16 > 0) {
        value >>= 16;
        result += 16;
      }
      if (value >> 8 > 0) {
        value >>= 8;
        result += 8;
      }
      if (value >> 4 > 0) {
        value >>= 4;
        result += 4;
      }
      if (value >> 2 > 0) {
        value >>= 2;
        result += 2;
      }
      if (value >> 1 > 0) {
        result += 1;
      }
    }
    return result;
  }

  /**
   * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
   * Returns 0 if given 0.
   */
  function log2(uint256 value, Rounding rounding)
  internal
  pure
  returns(uint256)
  {
        unchecked {
            uint256 result = log2(value);
      return
      result +
        (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
    }
  }

  /**
   * @dev Return the log in base 10, rounded down, of a positive value.
   * Returns 0 if given 0.
   */
  function log10(uint256 value) internal pure returns(uint256) {
        uint256 result = 0;
        unchecked {
      if (value >= 10 ** 64) {
        value /= 10 ** 64;
        result += 64;
      }
      if (value >= 10 ** 32) {
        value /= 10 ** 32;
        result += 32;
      }
      if (value >= 10 ** 16) {
        value /= 10 ** 16;
        result += 16;
      }
      if (value >= 10 ** 8) {
        value /= 10 ** 8;
        result += 8;
      }
      if (value >= 10 ** 4) {
        value /= 10 ** 4;
        result += 4;
      }
      if (value >= 10 ** 2) {
        value /= 10 ** 2;
        result += 2;
      }
      if (value >= 10 ** 1) {
        result += 1;
      }
    }
    return result;
  }

  /**
   * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
   * Returns 0 if given 0.
   */
  function log10(uint256 value, Rounding rounding)
  internal
  pure
  returns(uint256)
  {
        unchecked {
            uint256 result = log10(value);
      return
      result +
        (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
    }
  }

  /**
   * @dev Return the log in base 256, rounded down, of a positive value.
   * Returns 0 if given 0.
   *
   * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
   */
  function log256(uint256 value) internal pure returns(uint256) {
        uint256 result = 0;
        unchecked {
      if (value >> 128 > 0) {
        value >>= 128;
        result += 16;
      }
      if (value >> 64 > 0) {
        value >>= 64;
        result += 8;
      }
      if (value >> 32 > 0) {
        value >>= 32;
        result += 4;
      }
      if (value >> 16 > 0) {
        value >>= 16;
        result += 2;
      }
      if (value >> 8 > 0) {
        result += 1;
      }
    }
    return result;
  }

  /**
   * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
   * Returns 0 if given 0.
   */
  function log256(uint256 value, Rounding rounding)
  internal
  pure
  returns(uint256)
  {
        unchecked {
            uint256 result = log256(value);
      return
      result +
        (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
    }
  }
}

// File: @openzeppelin/contracts/utils/Strings.sol

// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)

pragma solidity ^ 0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _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) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
        ptr:= add(buffer, add(32, length))
      }
      while (true) {
        ptr--;
                /// @solidity memory-safe-assembly
                assembly {
          mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
        }
        value /= 10;
        if (value == 0) break;
      }
      return buffer;
    }
  }

  /**
   * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
   */
  function toHexString(uint256 value) internal pure returns(string memory) {
        unchecked {
      return toHexString(value, Math.log256(value) + 1);
    }
  }

  /**
   * @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] = _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 ^ 0.8.0;

/**
 * @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() {
    _nonReentrantBefore();
    _;
    _nonReentrantAfter();
  }

  function _nonReentrantBefore() private {
    // On the first call to nonReentrant, _status will be _NOT_ENTERED
    require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

    // Any calls to nonReentrant after this point will fail
    _status = _ENTERED;
  }

  function _nonReentrantAfter() private {
    // By storing the original value once again, a refund is triggered (see
    // https://eips.ethereum.org/EIPS/eip-2200)
    _status = _NOT_ENTERED;
  }
}

pragma solidity ^ 0.8.4;

/**
 * @dev Interface of ERC721 token receiver.
 */
interface ERC721A__IERC721Receiver {
    function onERC721Received(
  address operator,
  address from,
  uint256 tokenId,
  bytes calldata data
) external returns(bytes4);
}

/**
 * @title ERC721A
 *
 * @dev Implementation of the [ERC721](https://eips.ethereum.org/EIPS/eip-721)
 * Non-Fungible Token Standard, including the Metadata extension.
 * Optimized for lower gas during batch mints.
 *
 * Token IDs are minted in sequential order (e.g. 0, 1, 2, 3, ...)
 * starting from `_startTokenId()`.
 *
 * Assumptions:
 *
 * - An owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
 * - The maximum token ID cannot exceed 2**256 - 1 (max value of uint256).
 */
contract ERC721A is IERC721A {
    // Bypass for a `--via-ir` bug (https://github.com/chiru-labs/ERC721A/pull/364).
    struct TokenApprovalRef {
        address value;
  }

    // =============================================================
    //                           CONSTANTS
    // =============================================================

    // Mask of an entry in packed address data.
    uint256 private constant _BITMASK_ADDRESS_DATA_ENTRY = (1 << 64) - 1;

    // The bit position of `numberMinted` in packed address data.
    uint256 private constant _BITPOS_NUMBER_MINTED = 64;

    // The bit position of `numberBurned` in packed address data.
    uint256 private constant _BITPOS_NUMBER_BURNED = 128;

    // The bit position of `aux` in packed address data.
    uint256 private constant _BITPOS_AUX = 192;

    // Mask of all 256 bits in packed address data except the 64 bits for `aux`.
    uint256 private constant _BITMASK_AUX_COMPLEMENT = (1 << 192) - 1;

    // The bit position of `startTimestamp` in packed ownership.
    uint256 private constant _BITPOS_START_TIMESTAMP = 160;

    // The bit mask of the `burned` bit in packed ownership.
    uint256 private constant _BITMASK_BURNED = 1 << 224;

    // The bit position of the `nextInitialized` bit in packed ownership.
    uint256 private constant _BITPOS_NEXT_INITIALIZED = 225;

    // The bit mask of the `nextInitialized` bit in packed ownership.
    uint256 private constant _BITMASK_NEXT_INITIALIZED = 1 << 225;

    // The bit position of `extraData` in packed ownership.
    uint256 private constant _BITPOS_EXTRA_DATA = 232;

    // Mask of all 256 bits in a packed ownership except the 24 bits for `extraData`.
    uint256 private constant _BITMASK_EXTRA_DATA_COMPLEMENT = (1 << 232) - 1;

    // The mask of the lower 160 bits for addresses.
    uint256 private constant _BITMASK_ADDRESS = (1 << 160) - 1;

    // The maximum `quantity` that can be minted with {_mintERC2309}.
    // This limit is to prevent overflows on the address data entries.
    // For a limit of 5000, a total of 3.689e15 calls to {_mintERC2309}
    // is required to cause an overflow, which is unrealistic.
    uint256 private constant _MAX_MINT_ERC2309_QUANTITY_LIMIT = 5000;

    // The `Transfer` event signature is given by:
    // `keccak256(bytes("Transfer(address,address,uint256)"))`.
    bytes32 private constant _TRANSFER_EVENT_SIGNATURE =
    0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef;

    // =============================================================
    //                            STORAGE
    // =============================================================

    // The next token ID to be minted.
    uint256 private _currentIndex;

    // The number of tokens burned.
    uint256 private _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 {_packedOwnershipOf} implementation for details.
  //
  // Bits Layout:
  // - [0..159]   `addr`
  // - [160..223] `startTimestamp`
  // - [224]      `burned`
  // - [225]      `nextInitialized`
  // - [232..255] `extraData`
  mapping(uint256 => uint256) private _packedOwnerships;

  // Mapping owner address to address data.
  //
  // Bits Layout:
  // - [0..63]    `balance`
  // - [64..127]  `numberMinted`
  // - [128..191] `numberBurned`
  // - [192..255] `aux`
  mapping(address => uint256) private _packedAddressData;

  // Mapping from token ID to approved address.
  mapping(uint256 => TokenApprovalRef) private _tokenApprovals;

  // Mapping from owner to operator approvals
  mapping(address => mapping(address => bool)) private _operatorApprovals;

  // =============================================================
  //                          CONSTRUCTOR
  // =============================================================

  constructor(string memory name_, string memory symbol_) {
    _name = name_;
    _symbol = symbol_;
    _currentIndex = _startTokenId();
  }

  // =============================================================
  //                   TOKEN COUNTING OPERATIONS
  // =============================================================

  /**
   * @dev Returns the starting token ID.
   * To change the starting token ID, please override this function.
   */
  function _startTokenId() internal view virtual returns(uint256) {
    return 0;
  }

  /**
   * @dev Returns the next token ID to be minted.
   */
  function _nextTokenId() internal view virtual returns(uint256) {
    return _currentIndex;
  }

  /**
   * @dev Returns the total number of tokens in existence.
   * Burned tokens will reduce the count.
   * To get the total number of tokens minted, please see {_totalMinted}.
   */
  function totalSupply() public view virtual override returns(uint256) {
        // Counter underflow is impossible as _burnCounter cannot be incremented
        // more than `_currentIndex - _startTokenId()` times.
        unchecked {
      return _currentIndex - _burnCounter - _startTokenId();
    }
  }

  /**
   * @dev Returns the total amount of tokens minted in the contract.
   */
  function _totalMinted() internal view virtual returns(uint256) {
        // Counter underflow is impossible as `_currentIndex` does not decrement,
        // and it is initialized to `_startTokenId()`.
        unchecked {
      return _currentIndex - _startTokenId();
    }
  }

  /**
   * @dev Returns the total number of tokens burned.
   */
  function _totalBurned() internal view virtual returns(uint256) {
    return _burnCounter;
  }

  // =============================================================
  //                    ADDRESS DATA OPERATIONS
  // =============================================================

  /**
   * @dev Returns the number of tokens in `owner`'s account.
   */
  function balanceOf(address owner)
  public
  view
  virtual
  override
  returns(uint256)
  {
    if (owner == address(0)) _revert(BalanceQueryForZeroAddress.selector);
    return _packedAddressData[owner] & _BITMASK_ADDRESS_DATA_ENTRY;
  }

  /**
   * Returns the number of tokens minted by `owner`.
   */
  function _numberMinted(address owner) internal view returns(uint256) {
    return
    (_packedAddressData[owner] >> _BITPOS_NUMBER_MINTED) &
      _BITMASK_ADDRESS_DATA_ENTRY;
  }

  /**
   * Returns the number of tokens burned by or on behalf of `owner`.
   */
  function _numberBurned(address owner) internal view returns(uint256) {
    return
    (_packedAddressData[owner] >> _BITPOS_NUMBER_BURNED) &
      _BITMASK_ADDRESS_DATA_ENTRY;
  }

  /**
   * Returns the auxiliary data for `owner`. (e.g. number of whitelist mint slots used).
   */
  function _getAux(address owner) internal view returns(uint64) {
    return uint64(_packedAddressData[owner] >> _BITPOS_AUX);
  }

  /**
   * Sets the auxiliary 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 virtual {
        uint256 packed = _packedAddressData[owner];
        uint256 auxCasted;
        // Cast `aux` with assembly to avoid redundant masking.
        assembly {
      auxCasted:= aux
    }
    packed =
      (packed & _BITMASK_AUX_COMPLEMENT) |
      (auxCasted << _BITPOS_AUX);
    _packedAddressData[owner] = packed;
  }

  // =============================================================
  //                            IERC165
  // =============================================================

  /**
   * @dev Returns true if this contract implements the interface defined by
   * `interfaceId`. See the corresponding
   * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
   * to learn more about how these ids are created.
   *
   * This function call must use less than 30000 gas.
   */
  function supportsInterface(bytes4 interfaceId)
  public
  view
  virtual
  override
  returns(bool)
  {
    // The interface IDs are constants representing the first 4 bytes
    // of the XOR of all function selectors in the interface.
    // See: [ERC165](https://eips.ethereum.org/EIPS/eip-165)
    // (e.g. `bytes4(i.functionA.selector ^ i.functionB.selector ^ ...)`)
    return
    interfaceId == 0x01ffc9a7 || // ERC165 interface ID for ERC165.
      interfaceId == 0x80ac58cd || // ERC165 interface ID for ERC721.
      interfaceId == 0x5b5e139f; // ERC165 interface ID for ERC721Metadata.
  }

  // =============================================================
  //                        IERC721Metadata
  // =============================================================

  /**
   * @dev Returns the token collection name.
   */
  function name() public view virtual override returns(string memory) {
    return _name;
  }

  /**
   * @dev Returns the token collection symbol.
   */
  function symbol() public view virtual override returns(string memory) {
    return _symbol;
  }

  /**
   * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
   */
  function tokenURI(uint256 tokenId)
  public
  view
  virtual
  override
  returns(string memory)
  {
    if (!_exists(tokenId)) _revert(URIQueryForNonexistentToken.selector);

        string memory baseURI = _baseURI();
    return
    bytes(baseURI).length != 0
      ? string(abi.encodePacked(baseURI, _toString(tokenId)))
      : "";
  }

  /**
   * @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, it can be overridden in child contracts.
   */
  function _baseURI() internal view virtual returns(string memory) {
    return "";
  }

  // =============================================================
  //                     OWNERSHIPS OPERATIONS
  // =============================================================

  /**
   * @dev Returns the owner of the `tokenId` token.
   *
   * Requirements:
   *
   * - `tokenId` must exist.
   */
  function ownerOf(uint256 tokenId)
  public
  view
  virtual
  override
  returns(address)
  {
    return address(uint160(_packedOwnershipOf(tokenId)));
  }

  /**
   * @dev Gas spent here starts off proportional to the maximum mint batch size.
   * It gradually moves to O(1) as tokens get transferred around over time.
   */
  function _ownershipOf(uint256 tokenId)
  internal
  view
  virtual
  returns(TokenOwnership memory)
  {
    return _unpackedOwnership(_packedOwnershipOf(tokenId));
  }

  /**
   * @dev Returns the unpacked `TokenOwnership` struct at `index`.
   */
  function _ownershipAt(uint256 index)
  internal
  view
  virtual
  returns(TokenOwnership memory)
  {
    return _unpackedOwnership(_packedOwnerships[index]);
  }

  /**
   * @dev Returns whether the ownership slot at `index` is initialized.
   * An uninitialized slot does not necessarily mean that the slot has no owner.
   */
  function _ownershipIsInitialized(uint256 index)
  internal
  view
  virtual
  returns(bool)
  {
    return _packedOwnerships[index] != 0;
  }

  /**
   * @dev Initializes the ownership slot minted at `index` for efficiency purposes.
   */
  function _initializeOwnershipAt(uint256 index) internal virtual {
    if (_packedOwnerships[index] == 0) {
      _packedOwnerships[index] = _packedOwnershipOf(index);
    }
  }

  /**
   * Returns the packed ownership data of `tokenId`.
   */
  function _packedOwnershipOf(uint256 tokenId)
  private
  view
  returns(uint256 packed)
  {
    if (_startTokenId() <= tokenId) {
      packed = _packedOwnerships[tokenId];
      // If the data at the starting slot does not exist, start the scan.
      if (packed == 0) {
        if (tokenId >= _currentIndex)
          _revert(OwnerQueryForNonexistentToken.selector);
        // Invariant:
        // There will always be an initialized ownership slot
        // (i.e. `ownership.addr != address(0) && ownership.burned == false`)
        // before an unintialized ownership slot
        // (i.e. `ownership.addr == address(0) && ownership.burned == false`)
        // Hence, `tokenId` will not underflow.
        //
        // We can directly compare the packed value.
        // If the address is zero, packed will be zero.
        for (; ;) {
                    unchecked {
            packed = _packedOwnerships[--tokenId];
          }
          if (packed == 0) continue;
          if (packed & _BITMASK_BURNED == 0) return packed;
          // Otherwise, the token is burned, and we must revert.
          // This handles the case of batch burned tokens, where only the burned bit
          // of the starting slot is set, and remaining slots are left uninitialized.
          _revert(OwnerQueryForNonexistentToken.selector);
        }
      }
      // Otherwise, the data exists and we can skip the scan.
      // This is possible because we have already achieved the target condition.
      // This saves 2143 gas on transfers of initialized tokens.
      // If the token is not burned, return `packed`. Otherwise, revert.
      if (packed & _BITMASK_BURNED == 0) return packed;
    }
    _revert(OwnerQueryForNonexistentToken.selector);
  }

  /**
   * @dev Returns the unpacked `TokenOwnership` struct from `packed`.
   */
  function _unpackedOwnership(uint256 packed)
  private
  pure
  returns(TokenOwnership memory ownership)
  {
    ownership.addr = address(uint160(packed));
    ownership.startTimestamp = uint64(packed >> _BITPOS_START_TIMESTAMP);
    ownership.burned = packed & _BITMASK_BURNED != 0;
    ownership.extraData = uint24(packed >> _BITPOS_EXTRA_DATA);
  }

  /**
   * @dev Packs ownership data into a single uint256.
   */
  function _packOwnershipData(address owner, uint256 flags)
  private
  view
  returns(uint256 result)
  {
        assembly {
      // Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean.
      owner:= and(owner, _BITMASK_ADDRESS)
      // `owner | (block.timestamp << _BITPOS_START_TIMESTAMP) | flags`.
      result:= or(
        owner,
        or(shl(_BITPOS_START_TIMESTAMP, timestamp()), flags)
      )
    }
  }

  /**
   * @dev Returns the `nextInitialized` flag set if `quantity` equals 1.
   */
  function _nextInitializedFlag(uint256 quantity)
  private
  pure
  returns(uint256 result)
  {
        // For branchless setting of the `nextInitialized` flag.
        assembly {
      // `(quantity == 1) << _BITPOS_NEXT_INITIALIZED`.
      result:= shl(_BITPOS_NEXT_INITIALIZED, eq(quantity, 1))
    }
  }

  // =============================================================
  //                      APPROVAL OPERATIONS
  // =============================================================

  /**
   * @dev Gives permission to `to` to transfer `tokenId` token to another account. See {ERC721A-_approve}.
   *
   * Requirements:
   *
   * - The caller must own the token or be an approved operator.
   */
  function approve(address to, uint256 tokenId)
  public
  payable
  virtual
  override
  {
    _approve(to, tokenId, true);
  }

  /**
   * @dev Returns the account approved for `tokenId` token.
   *
   * Requirements:
   *
   * - `tokenId` must exist.
   */
  function getApproved(uint256 tokenId)
  public
  view
  virtual
  override
  returns(address)
  {
    if (!_exists(tokenId))
      _revert(ApprovalQueryForNonexistentToken.selector);

    return _tokenApprovals[tokenId].value;
  }

  /**
   * @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)
  public
  virtual
  override
  {
    _operatorApprovals[_msgSenderERC721A()][operator] = approved;
        emit ApprovalForAll(_msgSenderERC721A(), operator, approved);
  }

  /**
   * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
   *
   * See {setApprovalForAll}.
   */
  function isApprovedForAll(address owner, address operator)
  public
  view
  virtual
  override
  returns(bool)
  {
    return _operatorApprovals[owner][operator];
  }

  /**
   * @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. See {_mint}.
   */
  function _exists(uint256 tokenId)
  internal
  view
  virtual
  returns(bool result)
  {
    if (_startTokenId() <= tokenId) {
      if (tokenId < _currentIndex) {
                uint256 packed;
        while ((packed = _packedOwnerships[tokenId]) == 0) --tokenId;
        result = packed & _BITMASK_BURNED == 0;
      }
    }
  }

  /**
   * @dev Returns whether `msgSender` is equal to `approvedAddress` or `owner`.
   */
  function _isSenderApprovedOrOwner(
    address approvedAddress,
    address owner,
    address msgSender
  ) private pure returns(bool result) {
        assembly {
      // Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean.
      owner:= and(owner, _BITMASK_ADDRESS)
      // Mask `msgSender` to the lower 160 bits, in case the upper bits somehow aren't clean.
      msgSender:= and(msgSender, _BITMASK_ADDRESS)
      // `msgSender == owner || msgSender == approvedAddress`.
      result:= or(eq(msgSender, owner), eq(msgSender, approvedAddress))
    }
  }

  /**
   * @dev Returns the storage slot and value for the approved address of `tokenId`.
   */
  function _getApprovedSlotAndAddress(uint256 tokenId)
  private
  view
  returns(uint256 approvedAddressSlot, address approvedAddress)
  {
        TokenApprovalRef storage tokenApproval = _tokenApprovals[tokenId];
        // The following is equivalent to `approvedAddress = _tokenApprovals[tokenId].value`.
        assembly {
      approvedAddressSlot:= tokenApproval.slot
      approvedAddress:= sload(approvedAddressSlot)
    }
  }

  // =============================================================
  //                      TRANSFER OPERATIONS
  // =============================================================

  /**
   * @dev Transfers `tokenId` from `from` to `to`.
   *
   * 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
  ) public payable virtual override {
        uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);

    // Mask `from` to the lower 160 bits, in case the upper bits somehow aren't clean.
    from = address(uint160(uint256(uint160(from)) & _BITMASK_ADDRESS));

    if (address(uint160(prevOwnershipPacked)) != from)
      _revert(TransferFromIncorrectOwner.selector);

    (
      uint256 approvedAddressSlot,
        address approvedAddress
        ) = _getApprovedSlotAndAddress(tokenId);

    // The nested ifs save around 20+ gas over a compound boolean condition.
    if (
      !_isSenderApprovedOrOwner(
        approvedAddress,
        from,
        _msgSenderERC721A()
      )
    )
      if (!isApprovedForAll(from, _msgSenderERC721A()))
        _revert(TransferCallerNotOwnerNorApproved.selector);

    _beforeTokenTransfers(from, to, tokenId, 1);

        // Clear approvals from the previous owner.
        assembly {
      if approvedAddress {
        // This is equivalent to `delete _tokenApprovals[tokenId]`.
        sstore(approvedAddressSlot, 0)
      }
    }

        // 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 {
      // We can directly increment and decrement the balances.
      --_packedAddressData[from]; // Updates: `balance -= 1`.
      ++_packedAddressData[to]; // Updates: `balance += 1`.

      // Updates:
      // - `address` to the next owner.
      // - `startTimestamp` to the timestamp of transfering.
      // - `burned` to `false`.
      // - `nextInitialized` to `true`.
      _packedOwnerships[tokenId] = _packOwnershipData(
        to,
        _BITMASK_NEXT_INITIALIZED |
        _nextExtraData(from, to, prevOwnershipPacked)
      );

      // If the next slot may not have been initialized (i.e. `nextInitialized == false`) .
      if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED == 0) {
                uint256 nextTokenId = tokenId + 1;
        // If the next slot's address is zero and not burned (i.e. packed value is zero).
        if (_packedOwnerships[nextTokenId] == 0) {
          // If the next slot is within bounds.
          if (nextTokenId != _currentIndex) {
            // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.
            _packedOwnerships[nextTokenId] = prevOwnershipPacked;
          }
        }
      }
    }

        // Mask `to` to the lower 160 bits, in case the upper bits somehow aren't clean.
        uint256 toMasked = uint256(uint160(to)) & _BITMASK_ADDRESS;
        assembly {
      // Emit the `Transfer` event.
      log4(
        0, // Start of data (0, since no data).
        0, // End of data (0, since no data).
        _TRANSFER_EVENT_SIGNATURE, // Signature.
        from, // `from`.
        toMasked, // `to`.
        tokenId // `tokenId`.
      )
    }
    if (toMasked == 0) _revert(TransferToZeroAddress.selector);

    _afterTokenTransfers(from, to, tokenId, 1);
  }

  /**
   * @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`.
   */
  function safeTransferFrom(
    address from,
    address to,
    uint256 tokenId
  ) public payable virtual override {
    safeTransferFrom(from, to, tokenId, "");
  }

  /**
   * @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 memory _data
  ) public payable virtual override {
    transferFrom(from, to, tokenId);
    if (to.code.length != 0)
      if (!_checkContractOnERC721Received(from, to, tokenId, _data)) {
        _revert(TransferToNonERC721ReceiverImplementer.selector);
      }
  }

  /**
   * @dev Hook that is called before a set of serially-ordered token IDs
   * are about to be transferred. This includes minting.
   * And also called before burning one token.
   *
   * `startTokenId` - the first token ID to be transferred.
   * `quantity` - the amount to be transferred.
   *
   * Calling conditions:
   *
   * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
   * transferred to `to`.
   * - When `from` is zero, `tokenId` will be minted for `to`.
   * - When `to` is zero, `tokenId` will be burned by `from`.
   * - `from` and `to` are never both zero.
   */
  function _beforeTokenTransfers(
    address from,
    address to,
    uint256 startTokenId,
    uint256 quantity
  ) internal virtual { }

  /**
   * @dev Hook that is called after a set of serially-ordered token IDs
   * have been transferred. This includes minting.
   * And also called after one token has been burned.
   *
   * `startTokenId` - the first token ID to be transferred.
   * `quantity` - the amount to be transferred.
   *
   * Calling conditions:
   *
   * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
   * transferred to `to`.
   * - When `from` is zero, `tokenId` has been minted for `to`.
   * - When `to` is zero, `tokenId` has been burned by `from`.
   * - `from` and `to` are never both zero.
   */
  function _afterTokenTransfers(
    address from,
    address to,
    uint256 startTokenId,
    uint256 quantity
  ) internal virtual { }

  /**
   * @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target contract.
   *
   * `from` - Previous owner of the given token ID.
   * `to` - Target address that will receive the token.
   * `tokenId` - Token ID to be transferred.
   * `_data` - Optional data to send along with the call.
   *
   * Returns whether the call correctly returned the expected magic value.
   */
  function _checkContractOnERC721Received(
    address from,
    address to,
    uint256 tokenId,
    bytes memory _data
  ) private returns(bool) {
    try
            ERC721A__IERC721Receiver(to).onERC721Received(
      _msgSenderERC721A(),
      from,
      tokenId,
      _data
    )
    returns(bytes4 retval) {
      return
      retval ==
        ERC721A__IERC721Receiver(to).onERC721Received.selector;
    } catch (bytes memory reason) {
      if (reason.length == 0) {
        _revert(TransferToNonERC721ReceiverImplementer.selector);
      }
            assembly {
        revert(add(32, reason), mload(reason))
      }
    }
  }

  // =============================================================
  //                        MINT OPERATIONS
  // =============================================================

  /**
   * @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 for each mint.
   */
  function _mint(address to, uint256 quantity) internal virtual {
        uint256 startTokenId = _currentIndex;
    if (quantity == 0) _revert(MintZeroQuantity.selector);

    _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // `balance` and `numberMinted` have a maximum limit of 2**64.
        // `tokenId` has a maximum limit of 2**256.
        unchecked {
      // Updates:
      // - `address` to the owner.
      // - `startTimestamp` to the timestamp of minting.
      // - `burned` to `false`.
      // - `nextInitialized` to `quantity == 1`.
      _packedOwnerships[startTokenId] = _packOwnershipData(
        to,
        _nextInitializedFlag(quantity) |
        _nextExtraData(address(0), to, 0)
      );

      // Updates:
      // - `balance += quantity`.
      // - `numberMinted += quantity`.
      //
      // We can directly add to the `balance` and `numberMinted`.
      _packedAddressData[to] +=
        quantity *
        ((1 << _BITPOS_NUMBER_MINTED) | 1);

            // Mask `to` to the lower 160 bits, in case the upper bits somehow aren't clean.
            uint256 toMasked = uint256(uint160(to)) & _BITMASK_ADDRESS;

      if (toMasked == 0) _revert(MintToZeroAddress.selector);

            uint256 end = startTokenId + quantity;
            uint256 tokenId = startTokenId;

      do {
                assembly {
          // Emit the `Transfer` event.
          log4(
            0, // Start of data (0, since no data).
            0, // End of data (0, since no data).
            _TRANSFER_EVENT_SIGNATURE, // Signature.
            0, // `address(0)`.
            toMasked, // `to`.
            tokenId // `tokenId`.
          )
        }
        // The `!=` check ensures that large values of `quantity`
        // that overflows uint256 will make the loop run out of gas.
      } while (++tokenId != end);

      _currentIndex = end;
    }
    _afterTokenTransfers(address(0), to, startTokenId, quantity);
  }

  /**
   * @dev Mints `quantity` tokens and transfers them to `to`.
   *
   * This function is intended for efficient minting only during contract creation.
   *
   * It emits only one {ConsecutiveTransfer} as defined in
   * [ERC2309](https://eips.ethereum.org/EIPS/eip-2309),
   * instead of a sequence of {Transfer} event(s).
   *
   * Calling this function outside of contract creation WILL make your contract
   * non-compliant with the ERC721 standard.
   * For full ERC721 compliance, substituting ERC721 {Transfer} event(s) with the ERC2309
   * {ConsecutiveTransfer} event is only permissible during contract creation.
   *
   * Requirements:
   *
   * - `to` cannot be the zero address.
   * - `quantity` must be greater than 0.
   *
   * Emits a {ConsecutiveTransfer} event.
   */
  function _mintERC2309(address to, uint256 quantity) internal virtual {
        uint256 startTokenId = _currentIndex;
    if (to == address(0)) _revert(MintToZeroAddress.selector);
    if (quantity == 0) _revert(MintZeroQuantity.selector);
    if (quantity > _MAX_MINT_ERC2309_QUANTITY_LIMIT)
      _revert(MintERC2309QuantityExceedsLimit.selector);

    _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are unrealistic due to the above check for `quantity` to be below the limit.
        unchecked {
      // Updates:
      // - `balance += quantity`.
      // - `numberMinted += quantity`.
      //
      // We can directly add to the `balance` and `numberMinted`.
      _packedAddressData[to] +=
        quantity *
        ((1 << _BITPOS_NUMBER_MINTED) | 1);

      // Updates:
      // - `address` to the owner.
      // - `startTimestamp` to the timestamp of minting.
      // - `burned` to `false`.
      // - `nextInitialized` to `quantity == 1`.
      _packedOwnerships[startTokenId] = _packOwnershipData(
        to,
        _nextInitializedFlag(quantity) |
        _nextExtraData(address(0), to, 0)
      );

            emit ConsecutiveTransfer(
        startTokenId,
        startTokenId + quantity - 1,
        address(0),
        to
      );

      _currentIndex = startTokenId + quantity;
    }
    _afterTokenTransfers(address(0), to, startTokenId, 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.
   *
   * See {_mint}.
   *
   * Emits a {Transfer} event for each mint.
   */
  function _safeMint(
    address to,
    uint256 quantity,
    bytes memory _data
  ) internal virtual {
    _mint(to, quantity);

        unchecked {
      if (to.code.length != 0) {
                uint256 end = _currentIndex;
                uint256 index = end - quantity;
        do {
          if (
            !_checkContractOnERC721Received(
              address(0),
              to,
              index++,
              _data
            )
          ) {
            _revert(
              TransferToNonERC721ReceiverImplementer.selector
            );
          }
        } while (index < end);
        // Reentrancy protection.
        if (_currentIndex != end) _revert(bytes4(0));
      }
    }
  }

  /**
   * @dev Equivalent to `_safeMint(to, quantity, '')`.
   */
  function _safeMint(address to, uint256 quantity) internal virtual {
    _safeMint(to, quantity, "");
  }

  // =============================================================
  //                       APPROVAL OPERATIONS
  // =============================================================

  /**
   * @dev Equivalent to `_approve(to, tokenId, false)`.
   */
  function _approve(address to, uint256 tokenId) internal virtual {
    _approve(to, tokenId, false);
  }

  /**
   * @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:
   *
   * - `tokenId` must exist.
   *
   * Emits an {Approval} event.
   */
  function _approve(
    address to,
    uint256 tokenId,
    bool approvalCheck
  ) internal virtual {
        address owner = ownerOf(tokenId);

    if (approvalCheck && _msgSenderERC721A() != owner)
      if (!isApprovedForAll(owner, _msgSenderERC721A())) {
        _revert(ApprovalCallerNotOwnerNorApproved.selector);
      }

    _tokenApprovals[tokenId].value = to;
        emit Approval(owner, to, tokenId);
  }

  // =============================================================
  //                        BURN OPERATIONS
  // =============================================================

  /**
   * @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 {
        uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);

        address from = address(uint160(prevOwnershipPacked));

    (
      uint256 approvedAddressSlot,
        address approvedAddress
        ) = _getApprovedSlotAndAddress(tokenId);

    if (approvalCheck) {
      // The nested ifs save around 20+ gas over a compound boolean condition.
      if (
        !_isSenderApprovedOrOwner(
          approvedAddress,
          from,
          _msgSenderERC721A()
        )
      )
        if (!isApprovedForAll(from, _msgSenderERC721A()))
          _revert(TransferCallerNotOwnerNorApproved.selector);
    }

    _beforeTokenTransfers(from, address(0), tokenId, 1);

        // Clear approvals from the previous owner.
        assembly {
      if approvedAddress {
        // This is equivalent to `delete _tokenApprovals[tokenId]`.
        sstore(approvedAddressSlot, 0)
      }
    }

        // 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 {
      // Updates:
      // - `balance -= 1`.
      // - `numberBurned += 1`.
      //
      // We can directly decrement the balance, and increment the number burned.
      // This is equivalent to `packed -= 1; packed += 1 << _BITPOS_NUMBER_BURNED;`.
      _packedAddressData[from] += (1 << _BITPOS_NUMBER_BURNED) - 1;

      // Updates:
      // - `address` to the last owner.
      // - `startTimestamp` to the timestamp of burning.
      // - `burned` to `true`.
      // - `nextInitialized` to `true`.
      _packedOwnerships[tokenId] = _packOwnershipData(
        from,
        (_BITMASK_BURNED | _BITMASK_NEXT_INITIALIZED) |
        _nextExtraData(from, address(0), prevOwnershipPacked)
      );

      // If the next slot may not have been initialized (i.e. `nextInitialized == false`) .
      if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED == 0) {
                uint256 nextTokenId = tokenId + 1;
        // If the next slot's address is zero and not burned (i.e. packed value is zero).
        if (_packedOwnerships[nextTokenId] == 0) {
          // If the next slot is within bounds.
          if (nextTokenId != _currentIndex) {
            // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.
            _packedOwnerships[nextTokenId] = prevOwnershipPacked;
          }
        }
      }
    }

        emit Transfer(from, address(0), tokenId);
    _afterTokenTransfers(from, address(0), tokenId, 1);

        // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
        unchecked {
      _burnCounter++;
    }
  }

  // =============================================================
  //                     EXTRA DATA OPERATIONS
  // =============================================================

  /**
   * @dev Directly sets the extra data for the ownership data `index`.
   */
  function _setExtraDataAt(uint256 index, uint24 extraData) internal virtual {
        uint256 packed = _packedOwnerships[index];
    if (packed == 0) _revert(OwnershipNotInitializedForExtraData.selector);
        uint256 extraDataCasted;
        // Cast `extraData` with assembly to avoid redundant masking.
        assembly {
      extraDataCasted:= extraData
    }
    packed =
      (packed & _BITMASK_EXTRA_DATA_COMPLEMENT) |
      (extraDataCasted << _BITPOS_EXTRA_DATA);
    _packedOwnerships[index] = packed;
  }

  /**
   * @dev Called during each token transfer to set the 24bit `extraData` field.
   * Intended to be overridden by the cosumer contract.
   *
   * `previousExtraData` - the value of `extraData` before transfer.
   *
   * 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 _extraData(
    address from,
    address to,
    uint24 previousExtraData
  ) internal view virtual returns(uint24) { }

  /**
   * @dev Returns the next extra data for the packed ownership data.
   * The returned result is shifted into position.
   */
  function _nextExtraData(
    address from,
    address to,
    uint256 prevOwnershipPacked
  ) private view returns(uint256) {
        uint24 extraData = uint24(prevOwnershipPacked >> _BITPOS_EXTRA_DATA);
    return uint256(_extraData(from, to, extraData)) << _BITPOS_EXTRA_DATA;
  }

  // =============================================================
  //                       OTHER OPERATIONS
  // =============================================================

  /**
   * @dev Returns the message sender (defaults to `msg.sender`).
   *
   * If you are writing GSN compatible contracts, you need to override this function.
   */
  function _msgSenderERC721A() internal view virtual returns(address) {
    return msg.sender;
  }

  /**
   * @dev Converts a uint256 to its ASCII string decimal representation.
   */
  function _toString(uint256 value)
  internal
  pure
  virtual
  returns(string memory str)
  {
        assembly {
      // The maximum value of a uint256 contains 78 digits (1 byte per digit), but
      // we allocate 0xa0 bytes to keep the free memory pointer 32-byte word aligned.
      // We will need 1 word for the trailing zeros padding, 1 word for the length,
      // and 3 words for a maximum of 78 digits. Total: 5 * 0x20 = 0xa0.
      let m:= add(mload(0x40), 0xa0)
      // Update the free memory pointer to allocate.
      mstore(0x40, m)
      // Assign the `str` to the end.
      str:= sub(m, 0x20)
      // Zeroize the slot after the string.
      mstore(str, 0)

      // Cache the end of the memory to calculate the length later.
      let end:= str

      // We write the string from rightmost digit to leftmost digit.
      // The following is essentially a do-while loop that also handles the zero case.
      // prettier-ignore
      for { let temp:= value } 1 {} {
        str:= sub(str, 1)
        // Write the character to the pointer.
        // The ASCII index of the '0' character is 48.
        mstore8(str, add(48, mod(temp, 10)))
        // Keep dividing `temp` until zero.
        temp:= div(temp, 10)
        // prettier-ignore
        if iszero(temp) { break }
      }

      let length:= sub(end, str)
      // Move the pointer 32 bytes leftwards to make room for the length.
      str:= sub(str, 0x20)
      // Store the length.
      mstore(str, length)
    }
  }

  /**
   * @dev For more efficient reverts.
   */
  function _revert(bytes4 errorSelector) internal pure {
        assembly {
      mstore(0x00, errorSelector)
      revert(0x00, 0x04)
    }
  }
}

pragma solidity ^ 0.8.4;

/**
 * @dev Interface of ERC721AQueryable.
 */
interface IERC721AQueryable is IERC721A {
    /**
     * Invalid query range (`start` >= `stop`).
     */
    error InvalidQueryRange();

  /**
   * @dev Returns the `TokenOwnership` struct at `tokenId` without reverting.
   *
   * If the `tokenId` is out of bounds:
   *
   * - `addr = address(0)`
   * - `startTimestamp = 0`
   * - `burned = false`
   * - `extraData = 0`
   *
   * If the `tokenId` is burned:
   *
   * - `addr = <Address of owner before token was burned>`
   * - `startTimestamp = <Timestamp when token was burned>`
   * - `burned = true`
   * - `extraData = <Extra data when token was burned>`
   *
   * Otherwise:
   *
   * - `addr = <Address of owner>`
   * - `startTimestamp = <Timestamp of start of ownership>`
   * - `burned = false`
   * - `extraData = <Extra data at start of ownership>`
   */
  function explicitOwnershipOf(uint256 tokenId) external view returns(TokenOwnership memory);

  /**
   * @dev Returns an array of `TokenOwnership` structs at `tokenIds` in order.
   * See {ERC721AQueryable-explicitOwnershipOf}
   */
  function explicitOwnershipsOf(uint256[] memory tokenIds) external view returns(TokenOwnership[] memory);

  /**
   * @dev Returns an array of token IDs owned by `owner`,
   * in the range [`start`, `stop`)
   * (i.e. `start <= tokenId < stop`).
   *
   * This function allows for tokens to be queried if the collection
   * grows too big for a single call of {ERC721AQueryable-tokensOfOwner}.
   *
   * Requirements:
   *
   * - `start < stop`
   */
  function tokensOfOwnerIn(
    address owner,
    uint256 start,
    uint256 stop
  ) external view returns(uint256[] memory);

  /**
   * @dev Returns an array of token IDs owned by `owner`.
   *
   * This function scans the ownership mapping and is O(`totalSupply`) in complexity.
   * It is meant to be called off-chain.
   *
   * See {ERC721AQueryable-tokensOfOwnerIn} for splitting the scan into
   * multiple smaller scans if the collection is large enough to cause
   * an out-of-gas error (10K collections should be fine).
   */
  function tokensOfOwner(address owner) external view returns(uint256[] memory);
}

pragma solidity ^ 0.8.4;

/**
 * @title ERC721AQueryable.
 *
 * @dev ERC721A subclass with convenience query functions.
 */
abstract contract ERC721AQueryable is ERC721A, IERC721AQueryable {
  /**
   * @dev Returns the `TokenOwnership` struct at `tokenId` without reverting.
   *
   * If the `tokenId` is out of bounds:
   *
   * - `addr = address(0)`
   * - `startTimestamp = 0`
   * - `burned = false`
   * - `extraData = 0`
   *
   * If the `tokenId` is burned:
   *
   * - `addr = <Address of owner before token was burned>`
   * - `startTimestamp = <Timestamp when token was burned>`
   * - `burned = true`
   * - `extraData = <Extra data when token was burned>`
   *
   * Otherwise:
   *
   * - `addr = <Address of owner>`
   * - `startTimestamp = <Timestamp of start of ownership>`
   * - `burned = false`
   * - `extraData = <Extra data at start of ownership>`
   */
  function explicitOwnershipOf(uint256 tokenId)
  public
  view
  virtual
  override
  returns(TokenOwnership memory ownership)
  {
        unchecked {
      if (tokenId >= _startTokenId()) {
        if (tokenId < _nextTokenId()) {
          // If the `tokenId` is within bounds,
          // scan backwards for the initialized ownership slot.
          while (!_ownershipIsInitialized(tokenId)) --tokenId;
          return _ownershipAt(tokenId);
        }
      }
    }
  }

  /**
   * @dev Returns an array of `TokenOwnership` structs at `tokenIds` in order.
   * See {ERC721AQueryable-explicitOwnershipOf}
   */
  function explicitOwnershipsOf(uint256[] calldata tokenIds)
  external
  view
  virtual
  override
  returns(TokenOwnership[] memory)
  {
    TokenOwnership[] memory ownerships;
        uint256 i = tokenIds.length;
        assembly {
      // Grab the free memory pointer.
      ownerships:= mload(0x40)
      // Store the length.
      mstore(ownerships, i)
      // Allocate one word for the length,
      // `tokenIds.length` words for the pointers.
      i:= shl(5, i) // Multiply `i` by 32.
      mstore(0x40, add(add(ownerships, 0x20), i))
    }
    while (i != 0) {
            uint256 tokenId;
            assembly {
        i:= sub(i, 0x20)
        tokenId:= calldataload(add(tokenIds.offset, i))
      }
            TokenOwnership memory ownership = explicitOwnershipOf(tokenId);
            assembly {
        // Store the pointer of `ownership` in the `ownerships` array.
        mstore(add(add(ownerships, 0x20), i), ownership)
      }
    }
    return ownerships;
  }

  /**
   * @dev Returns an array of token IDs owned by `owner`,
   * in the range [`start`, `stop`)
   * (i.e. `start <= tokenId < stop`).
   *
   * This function allows for tokens to be queried if the collection
   * grows too big for a single call of {ERC721AQueryable-tokensOfOwner}.
   *
   * Requirements:
   *
   * - `start < stop`
   */
  function tokensOfOwnerIn(
    address owner,
    uint256 start,
    uint256 stop
  ) external view virtual override returns(uint256[] memory) {
    return _tokensOfOwnerIn(owner, start, stop);
  }

  /**
   * @dev Returns an array of token IDs owned by `owner`.
   *
   * This function scans the ownership mapping and is O(`totalSupply`) in complexity.
   * It is meant to be called off-chain.
   *
   * See {ERC721AQueryable-tokensOfOwnerIn} for splitting the scan into
   * multiple smaller scans if the collection is large enough to cause
   * an out-of-gas error (10K collections should be fine).
   */
  function tokensOfOwner(address owner) external view virtual override returns(uint256[] memory) {
        uint256 start = _startTokenId();
        uint256 stop = _nextTokenId();
    uint256[] memory tokenIds;
    if (start != stop) tokenIds = _tokensOfOwnerIn(owner, start, stop);
    return tokenIds;
  }

  /**
   * @dev Helper function for returning an array of token IDs owned by `owner`.
   *
   * Note that this function is optimized for smaller bytecode size over runtime gas,
   * since it is meant to be called off-chain.
   */
  function _tokensOfOwnerIn(
    address owner,
    uint256 start,
    uint256 stop
  ) private view returns(uint256[] memory) {
        unchecked {
      if (start >= stop) _revert(InvalidQueryRange.selector);
      // Set `start = max(start, _startTokenId())`.
      if (start < _startTokenId()) {
        start = _startTokenId();
      }
            uint256 stopLimit = _nextTokenId();
      // Set `stop = min(stop, stopLimit)`.
      if (stop >= stopLimit) {
        stop = stopLimit;
      }
      uint256[] memory tokenIds;
            uint256 tokenIdsMaxLength = balanceOf(owner);
            bool startLtStop = start < stop;
            assembly {
        // Set `tokenIdsMaxLength` to zero if `start` is less than `stop`.
        tokenIdsMaxLength:= mul(tokenIdsMaxLength, startLtStop)
      }
      if (tokenIdsMaxLength != 0) {
        // Set `tokenIdsMaxLength = min(balanceOf(owner), stop - start)`,
        // to cater for cases where `balanceOf(owner)` is too big.
        if (stop - start <= tokenIdsMaxLength) {
          tokenIdsMaxLength = stop - start;
        }
                assembly {
          // Grab the free memory pointer.
          tokenIds:= mload(0x40)
          // Allocate one word for the length, and `tokenIdsMaxLength` words
          // for the data. `shl(5, x)` is equivalent to `mul(32, x)`.
          mstore(0x40, add(tokenIds, shl(5, add(tokenIdsMaxLength, 1))))
        }
                // We need to call `explicitOwnershipOf(start)`,
                // because the slot at `start` may not be initialized.
                TokenOwnership memory ownership = explicitOwnershipOf(start);
                address currOwnershipAddr;
        // If the starting slot exists (i.e. not burned),
        // initialize `currOwnershipAddr`.
        // `ownership.address` will not be zero,
        // as `start` is clamped to the valid token ID range.
        if (!ownership.burned) {
          currOwnershipAddr = ownership.addr;
        }
                uint256 tokenIdsIdx;
        // Use a do-while, which is slightly more efficient for this case,
        // as the array will at least contain one element.
        do {
          ownership = _ownershipAt(start);
                    assembly {
            switch mload(add(ownership, 0x40))
                        // if `ownership.burned == false`.
                        case 0 {
              // if `ownership.addr != address(0)`.
              // The `addr` already has it's upper 96 bits clearned,
              // since it is written to memory with regular Solidity.
              if mload(ownership) {
                currOwnershipAddr:= mload(ownership)
              }
              // if `currOwnershipAddr == owner`.
              // The `shl(96, x)` is to make the comparison agnostic to any
              // dirty upper 96 bits in `owner`.
              if iszero(shl(96, xor(currOwnershipAddr, owner))) {
                tokenIdsIdx:= add(tokenIdsIdx, 1)
                mstore(add(tokenIds, shl(5, tokenIdsIdx)), start)
              }
            }
              // Otherwise, reset `currOwnershipAddr`.
              // This handles the case of batch burned tokens
              // (burned bit of first slot set, remaining slots left uninitialized).
              default {
                currOwnershipAddr:= 0
              }
                start:= add(start, 1)
            }
          } while (!(start == stop || tokenIdsIdx == tokenIdsMaxLength));
                // Store the length of the array.
                assembly {
            mstore(tokenIds, tokenIdsIdx)
          }
        }
            return tokenIds;
      }
    }
  }

pragma solidity ^ 0.8.4;

contract PROUDLIONSCLUB is
  ERC721A,
    ReentrancyGuard,
    Ownable,
    ERC721AQueryable,
    DefaultOperatorFilterer
  {
    string private _baseTokenURI;
    string private defaultTokenURI = "https://api.proudlionsclub.com/tokenids/";

    constructor() ERC721A("Proud Lions Club 2.0", "PLC") { }

    function mint(address[] memory users, uint256[] memory numberOfToken)
    external
    onlyOwner
    {
      require(
        users.length == numberOfToken.length,
        "users and numberOfToken length must be the same"
      );
      for (uint i = 0; i < users.length; i++) {
        _mint(users[i], numberOfToken[i]);
      }
    }

    function _baseURI() internal view virtual override returns(string memory) {
      return _baseTokenURI;
    }

    function setBaseURI(string calldata baseURI) external onlyOwner {
      _baseTokenURI = baseURI;
    }

    function tokenURI(uint256 tokenId)
    public
    view
    virtual
    override(ERC721A, IERC721A)
    returns(string memory)
    {
      if (!_exists(tokenId)) revert URIQueryForNonexistentToken();

        string memory baseURI = _baseURI();
      return
      bytes(baseURI).length != 0
        ? string(abi.encodePacked(baseURI, _toString(tokenId), ".json"))
        : defaultTokenURI;
    }

    function setApprovalForAll(address operator, bool approved)
    public
    override(ERC721A, IERC721A)
    onlyAllowedOperatorApproval(operator)
    {
      super.setApprovalForAll(operator, approved);
    }

    function approve(address operator, uint256 tokenId)
    public
    payable
    override
      (ERC721A, IERC721A)
    onlyAllowedOperatorApproval(operator)
    {
      super.approve(operator, tokenId);
    }

    function transferFrom(
      address from,
      address to,
      uint256 tokenId
    ) public payable override(ERC721A, IERC721A) onlyAllowedOperator(from) {
      super.transferFrom(from, to, tokenId);
    }

    function safeTransferFrom(
      address from,
      address to,
      uint256 tokenId
    ) public payable override(ERC721A, IERC721A) onlyAllowedOperator(from) {
      super.safeTransferFrom(from, to, tokenId);
    }

    function safeTransferFrom(
      address from,
      address to,
      uint256 tokenId,
      bytes memory data
    ) public payable override(ERC721A, IERC721A) onlyAllowedOperator(from) {
      super.safeTransferFrom(from, to, tokenId, data);
    }
  }