Distracted Dudes

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)

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);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// a16z Contracts v0.0.1 (CantBeEvil.sol)
pragma solidity ^0.8.13;

import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import "./ICantBeEvil.sol";

enum LicenseVersion {
    PUBLIC,
    EXCLUSIVE,
    COMMERCIAL,
    COMMERCIAL_NO_HATE,
    PERSONAL,
    PERSONAL_NO_HATE
}

contract CantBeEvil is ERC165, ICantBeEvil {
    using Strings for uint;
    string internal constant _BASE_LICENSE_URI = "ar://zmc1WTspIhFyVY82bwfAIcIExLFH5lUcHHUN0wXg4W8/";
    LicenseVersion internal licenseVersion;
    constructor(LicenseVersion _licenseVersion) {
        licenseVersion = _licenseVersion;
    }

    function getLicenseURI() public view returns (string memory) {
        return string.concat(_BASE_LICENSE_URI, uint(licenseVersion).toString());
    }

    function getLicenseName() public view returns (string memory) {
        return _getLicenseVersionKeyByValue(licenseVersion);
    }

    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165) returns (bool) {
        return
            interfaceId == type(ICantBeEvil).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    function _getLicenseVersionKeyByValue(LicenseVersion _licenseVersion) internal pure returns (string memory) {
        require(uint8(_licenseVersion) <= 6);
        if (LicenseVersion.PUBLIC == _licenseVersion) return "PUBLIC";
        if (LicenseVersion.EXCLUSIVE == _licenseVersion) return "EXCLUSIVE";
        if (LicenseVersion.COMMERCIAL == _licenseVersion) return "COMMERCIAL";
        if (LicenseVersion.COMMERCIAL_NO_HATE == _licenseVersion) return "COMMERCIAL_NO_HATE";
        if (LicenseVersion.PERSONAL == _licenseVersion) return "PERSONAL";
        else return "PERSONAL_NO_HATE";
    }
}

// SPDX-License-Identifier: MIT
// 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;
    }
}

//SPDX-License-Identifier: MIT
pragma solidity 0.8.15;

import "./WTFERC721.sol";
import { IERC721 } from "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import { LicenseVersion, CantBeEvil } from "@a16z/contracts/licenses/CantBeEvil.sol";
import { IDudesAuctionHouse } from "./IDudesAuctionHouse.sol";

/**
 * @title Distracted Dudes
 * @notice What distracts you?? Released CC0; onchain verifiable via a16z Cant Be Evil license
 */
contract DistractedDudes is WTFERC721, Ownable, CantBeEvil(LicenseVersion.PUBLIC) {
  /* ============ Variables ============ */

  /// @notice NFT price in ETH
  uint256 public price;

  /// @notice mfer contract address
  IERC721 public immutable mferAddress;

  /// @notice pfer contract address
  IERC721 public immutable pferAddress;

  /// @notice sproto contract address
  IERC721 public immutable sprotoAddress;

  /// @notice Max number of non 1/1 NFTs available in this collection
  uint256 public immutable maxNFT;

  /// @notice Max number of 1/1 NFTs available in this collection
  uint256 public immutable max1o1NFT;

  /// @notice Max number of NFTs that can be public minted in a single transaction
  uint256 public immutable maxPublicMint;

  /// @notice Timestamp of when public sale starts
  uint256 public saleStartTimestamp;

  /// @notice Timestamp of when presale starts
  uint256 public presaleStartTimestamp;

  /// @notice Total current supply of non 1/1 NFTs
  uint256 public dudeCurrentSupply;

  /// @notice Total current supply of 1/1 NFTs
  uint256 public dude1o1CurrentSupply;

  /// @notice NFT tokens base URI
  string public baseURI;

  /// @notice Map to track what access token ids were used to mint dudes
  mapping(IERC721 => mapping(uint256 => bool)) public accessTokenUsedToMint;

  IDudesAuctionHouse public auctionHouse;

  /// @notice Flag for if NFT metadata is revealed
  bool private revealed = false;

  string private constant PRE_REVEAL_URI = "ipfs://QmP1paK6cVekPPCvMGH6JHKVu1QYu4tMBZDqbYs5LWoM3A";

  address payable private mainDude;

  /* ============ Structs ============ */
  // Enum for type of access NFT
  enum AccessNFTType {
    MFER,
    PFER,
    SPROTO
  }

  struct ContractData {
    uint256 price;
    IERC721 mferAddress;
    IERC721 pferAddress;
    IERC721 sprotoAddress;
    uint256 maxNFT;
    uint256 max1o1NFT;
    uint256 maxPublicMint;
    uint256 saleStartTimestamp;
    uint256 presaleStartTimestamp;
    address payable mainDude;
  }

  /* ============ Constructor ============ */

  /**
   * @notice Initializes the NFT contract
   * @param _name NFT collection name
   * @param _symbol NFT collection symbol
   * @param _contractData struct containing contract data
   *          price - price per dude
   *          mferAddress - mfer contract address
   *          pferAddress - pfer contract address
   *          sprotoAddress - sproto contract address
   *          maxNFT - max number of non 1/1 NFTs available in this collection
   *          max1o1NFT - max number of 1/1 NFTs available in this collection
   *          maxPublicMint - max number of NFTs that can be public minted
   *          saleStartTimestamp - timestamp of when public sale starts
   *          presaleStartTimestamp - timestamp of when early access presale starts
   *          mainDude - main dude address
   */
  constructor(
    string memory _name,
    string memory _symbol,
    ContractData memory _contractData
  ) WTFERC721(_name, _symbol) {
    require(_contractData.maxNFT > 0, "Dudes:max-nft-gt-zero");
    require(_contractData.max1o1NFT > 0, "Dudes:max-1o1-gt-zero");
    require(_contractData.maxPublicMint > 0, "Dudes:max-mint-gt-zero");
    require(_contractData.presaleStartTimestamp > block.timestamp, "Dudes:presale-start-gt-now");
    require(_contractData.saleStartTimestamp > block.timestamp, "Dudes:sale-start-gt-now");
    require(_contractData.mainDude != address(0), "Dudes:main-dude-not-zero-address");

    price = _contractData.price;
    mferAddress = _contractData.mferAddress;
    pferAddress = _contractData.pferAddress;
    sprotoAddress = _contractData.sprotoAddress;
    maxNFT = _contractData.maxNFT;
    max1o1NFT = _contractData.max1o1NFT;
    maxPublicMint = _contractData.maxPublicMint;
    saleStartTimestamp = _contractData.saleStartTimestamp;
    presaleStartTimestamp = _contractData.presaleStartTimestamp;
    mainDude = _contractData.mainDude;
  }

  modifier onlyAuctionHouse() {
    require(msg.sender != address(0) && msg.sender == address(auctionHouse), "Dudes:caller-is-not-auction-house");
    _;
  }

  /* ============ External Functions ============ */

  function supportsInterface(bytes4 interfaceId)
    public
    view
    virtual
    override(CantBeEvil, WTFERC721)
    returns (bool)
  {
    return super.supportsInterface(interfaceId);
  }

  function totalSupply() external view returns (uint256) {
    return dudeCurrentSupply + dude1o1CurrentSupply - balanceOf(address(0));
  }

  /**
   * @notice Returns true is public sale is live.
   */
  function isPublicSaleActive() external view returns (bool) {
    return _isPublicSaleActive();
  }

  /**
   * @notice Returns true if mfers can mint.
   */
  function isPremintActive() external view returns (bool) {
    return _isPremintActive();
  }

  /**
   * @notice Override: returns token uri or static reveal uri if reveal is not active
   */
  function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
    if (revealed) {
      return super.tokenURI(tokenId);
    } else {
      return PRE_REVEAL_URI;
    }
  }

  /**
   * @notice Returns true if the specific access token has been used to mint a dude
   */
  function isAccessTokenUsed(address _accessTokenAddress, uint256 _tokenId)
    external
    view
    returns (bool)
  {
    return _isAccessTokenUsed(_accessTokenAddress, _tokenId);
  }

  /**
   * @notice set reveal state to true
   * no way to set reveal back to false riskaay
   */
  function setRevealed() external onlyOwner {
    revealed = true;
  }

  function setPrice(uint256 _price) external onlyOwner {
    price = _price;
  }

  function setMainDude(address payable _mainDude) external onlyOwner {
    mainDude = _mainDude;
  }

  function setAuctionHouse(IDudesAuctionHouse _auctionHouse) external onlyOwner {
    auctionHouse = _auctionHouse;
  }

  /**
   * @notice Mints a new number of dudes at a 1:1 ratio of mfer/pfer/sproto.
   * @param _accessTokenIds list of mfer/pfer/sproto token ids that the sender holds to mint dudes
   * @param _accessNFTType type of access NFT from AccessNFTType enum - 0 for mfer, 1 for pfer, 2 for sproto
   * @dev be aware that even if one of the access token ids is not valid, the whole transaction will fail
   */
  function premint(uint256[] calldata _accessTokenIds, uint8 _accessNFTType) external payable {
    require(_isPremintActive(), "Dudes:premint-not-active");
    require(!_isPublicSaleActive(), "Dudes:premint-is-over");
    uint256 numberOfTokens = _accessTokenIds.length;
    require(numberOfTokens > 0, "Dudes:premint-ids-gt-zero");

    // set erc721 contract address based on accessNFTType
    IERC721 accessNFTAddress;
    if (_accessNFTType == uint8(AccessNFTType.MFER)) {
      accessNFTAddress = mferAddress;
    } else if (_accessNFTType == uint8(AccessNFTType.PFER)) {
      accessNFTAddress = pferAddress;
    } else if (_accessNFTType == uint8(AccessNFTType.SPROTO)) {
      accessNFTAddress = sprotoAddress;
    } else {
      revert("Dudes:invalid-access-nft-type");
    }

    require(accessNFTAddress.balanceOf(msg.sender) >= numberOfTokens, "Dudes:not-enough-tokens");

    uint256 _totalSupply = dudeCurrentSupply;
    require(_totalSupply + numberOfTokens <= maxNFT, "Dudes:premint-sold-out");

    // loop through the list of access tokens
    // check that the msg.sender owns the token
    // check that the token has not been used to mint a dude
    // if all checks pass, mint a dude and mark the token as used

    for (uint256 i = 0; i < numberOfTokens; i++) {
      uint256 accessTokenId = _accessTokenIds[i];
      require(accessNFTAddress.ownerOf(accessTokenId) == msg.sender, "Dudes:premint-not-owner");
      require(
        accessTokenUsedToMint[accessNFTAddress][accessTokenId] == false,
        "Dudes:premint-already-used"
      );
      uint256 mintTokenId = _totalSupply + i;
      accessTokenUsedToMint[accessNFTAddress][accessTokenId] = true;
      _safeMint(msg.sender, mintTokenId);
    }

    dudeCurrentSupply += numberOfTokens;
  }

  /**
   * @notice Mints a new number of dudes.
   * @param _numberOfTokens Number of dudes to mint
   */
  function mintDudes(uint256 _numberOfTokens) external payable {
    require(_isPublicSaleActive(), "Dudes:sale-inactive");

    require(_numberOfTokens > 0, "Dudes:wtf");

    uint256 _totalSupply = dudeCurrentSupply;

    require(_totalSupply + _numberOfTokens <= maxNFT, "Dudes:sold-out");
    require(_numberOfTokens <= maxPublicMint, "Dudes:exceeds-max-mint-per-tx");

    uint256 totalCost = _numberOfTokens * price;
    require(msg.value >= totalCost, "Dudes:insufficient-funds");

    dudeCurrentSupply += _numberOfTokens;

    for (uint256 i; i < _numberOfTokens; i++) {
      uint256 _mintIndex = _totalSupply + i;
      _safeMint(msg.sender, _mintIndex);
    }
  }

  /**
   * @notice Set NFT tokens base URI
   * @dev This function is only callable by the owner of the contract.
   * @param baseURI_ NFT tokens base URI
   */
  function setBaseURI(string memory baseURI_) external onlyOwner {
    baseURI = baseURI_;
  }

  /**
   * @notice Withdraw ETH from the contract.
   * @dev This function can be called by anyone but hardcode to withdraw to only specific address.
   */
  function withdraw() external {
    uint256 _amount = address(this).balance;
    require(_amount > 0, "Dudes:withdraw-amount-gt-zero");

    (bool _success, ) = mainDude.call{ value: _amount }("");

    require(_success, "Dudes:failed-to-withdraw-eth");
  }

  receive() external payable {}

  /* ============ Internal Functions ============ */

  function _isPublicSaleActive() internal view returns (bool) {
    return saleStartTimestamp < block.timestamp;
  }

  function _isPremintActive() internal view returns (bool) {
    return presaleStartTimestamp < block.timestamp;
  }

  function _isAccessTokenUsed(address _accessTokenAddress, uint256 _tokenId)
    internal
    view
    returns (bool)
  {
    return accessTokenUsedToMint[IERC721(_accessTokenAddress)][_tokenId];
  }

  /**
   * @notice Set NFT base URI.
   * @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 overridden in child contracts.
   * @return NFT tokens base URI
   */
  function _baseURI() internal view virtual override returns (string memory) {
    return baseURI;
  }

  function _beforeTokenTransfer(
    address from,
    address to,
    uint256 tokenId
  ) internal virtual override {
    if (address(auctionHouse) != address(0)) {
      // do not allow transfers of dudes out for the current auction winner
      IDudesAuctionHouse.Auction memory _auction = auctionHouse.getActiveAuction();
      if (_auction.bidder != address(0)) {
        if (!_auction.settled) {
          require(_auction.bidder != from, "Dudes:transfer-auction-bidder");
        }
      }
    }
  }

  /* ============ Auction House Functions ============ */

  /**
   * @notice Get the next 1 of 1 dude token id.
   * @dev the 1 of 1 token ids will start at the non 1 of 1 max supply for the collection. Since token ids are zero indexed,
   *  the first token id of the 1 of 1s will be maxNFT.
   * @return dudeId The next 1 of 1 dude token id or 0 if there are no more dudes for auction
   */
  function getDudeForAuction() external view returns (uint256 dudeId) {
    if (dude1o1CurrentSupply < max1o1NFT) {
      dudeId = maxNFT + dude1o1CurrentSupply;
    } else {
      dudeId = 0;
    }
  }

  function mintAuctionDude(address _winner, uint256 _dudeId) external onlyAuctionHouse {
    dude1o1CurrentSupply++;
    _safeMint(_winner, _dudeId);
  }

  function burnByAuction(uint256 _dudeId) external onlyAuctionHouse {
    _burn(_dudeId);
  }
}

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

pragma solidity ^0.8.0;

import "./IERC165.sol";

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

// SPDX-License-Identifier: MIT
// a16z Contracts v0.0.1 (ICantBeEvil.sol)
pragma solidity ^0.8.13;

interface ICantBeEvil {
    function getLicenseURI() external view returns (string memory);
    function getLicenseName() external view returns (string memory);
}

// SPDX-License-Identifier: GPL-3.0

/// @title Interface for Dudes Auction House

// LICENSE
// IDudesAuctionHouse.sol is a modified version of Nouns's INounsAuctionHouse.sol:
// https://github.com/nounsDAO/nouns-monorepo/blob/master/packages/nouns-contracts/contracts/interfaces/INounsAuctionHouse.sol
//
// INounsAuctionHouse.sol source code Copyright Nounders DAO licensed under the GPL-3.0 license.
// With modifications by the Dudes.

pragma solidity 0.8.15;

interface IDudesAuctionHouse {
  struct Auction {
    // ID for the DUDE (ERC721 token ID)
    uint256 dudeId;
    // The current highest bid amount
    // This will be the number of DUDE NFTs
    uint256 amount;
    // The time that the auction started
    uint256 startTime;
    // The time that the auction is scheduled to end
    uint256 endTime;
    // The address of the current highest bid
    address bidder;
    // Whether or not the auction has been settled
    bool settled;
    // array of dude token ids that were used to bid
    uint256[] biddedDudes;
  }

  event AuctionCreated(uint256 indexed dudeId, uint256 startTime, uint256 endTime);

  event AuctionBid(uint256 indexed dudeId, address sender, uint256 value, bool extended);

  event AuctionExtended(uint256 indexed dudeId, uint256 endTime);

  event AuctionSettled(uint256 indexed dudeId, address winner, uint256 amount);

  event AuctionTimeBufferUpdated(uint256 timeBuffer);

  event AuctionReservePriceUpdated(uint256 reservePrice);

  event AuctionMinBidIncrementPercentageUpdated(uint256 minBidIncrementPercentage);

  function getActiveAuction() external view returns (IDudesAuctionHouse.Auction memory);

  function getActiveAuctionBiddedDudes() external view returns (uint256[] memory);

  function settleAuction() external;

  function settleCurrentAndCreateNewAuction() external;

  function createBid(uint256 dudeId, uint256[] calldata dudesToUse) external;

  function setTimeBuffer(uint256 timeBuffer) external;

  function setReservePrice(uint256 reservePrice) external;

  function setMinBidIncrementPercentage(uint8 minBidIncrementPercentage) external;
}

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

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface 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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

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

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

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

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

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * 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);
}

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

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @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);
}

// SPDX-License-Identifier: MIT
// 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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _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);
    }
}

// SPDX-License-Identifier: MIT
// 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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/ERC721.sol)

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
contract WTFERC721 is Context, ERC165, IERC721, IERC721Metadata {
  using Address for address;
  using Strings for uint256;

  // Token name
  string private _name;

  // Token symbol
  string private _symbol;

  // Mapping from token ID to owner address
  mapping(uint256 => address) private _owners;

  // Mapping owner address to token count
  mapping(address => uint256) private _balances;

  // 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;

  /**
   * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
   */
  constructor(string memory name_, string memory symbol_) {
    _name = name_;
    _symbol = symbol_;
  }

  /**
   * @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 virtual override returns (uint256) {
    return _balances[owner];
  }

  /**
   * @dev See {IERC721-ownerOf}.
   */
  function ownerOf(uint256 tokenId) public view virtual override returns (address) {
    address owner = _owners[tokenId];
    require(owner != address(0), "ERC721: invalid token ID");
    return owner;
  }

  /**
   * @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) {
    _requireMinted(tokenId);

    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 overridden 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 = WTFERC721.ownerOf(tokenId);
    require(to != owner, "ERC721: approval to current owner");

    require(
      _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
      "ERC721: approve caller is not token owner nor approved for all"
    );

    _approve(to, tokenId);
  }

  /**
   * @dev See {IERC721-getApproved}.
   */
  function getApproved(uint256 tokenId) public view virtual override returns (address) {
    _requireMinted(tokenId);

    return _tokenApprovals[tokenId];
  }

  /**
   * @dev See {IERC721-setApprovalForAll}.
   */
  function setApprovalForAll(address operator, bool approved) public virtual override {
    _setApprovalForAll(_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 {
    //solhint-disable-next-line max-line-length
    require(
      _isApprovedOrOwner(_msgSender(), tokenId),
      "ERC721: caller is not token owner nor approved"
    );

    _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 {
    require(
      _isApprovedOrOwner(_msgSender(), tokenId),
      "ERC721: caller is not token owner nor approved"
    );
    _safeTransfer(from, to, tokenId, data);
  }

  /**
   * @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.
   *
   * `data` is additional data, it has no specified format and it is sent in call to `to`.
   *
   * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
   * implement alternative mechanisms to perform token transfer, such as signature-based.
   *
   * Requirements:
   *
   * - `from` cannot be the zero address.
   * - `to` cannot be the zero address.
   * - `tokenId` token must exist and be owned by `from`.
   * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
   *
   * Emits a {Transfer} event.
   */
  function _safeTransfer(
    address from,
    address to,
    uint256 tokenId,
    bytes memory data
  ) internal virtual {
    _transfer(from, to, tokenId);
    require(
      _checkOnERC721Received(from, to, tokenId, data),
      "ERC721: transfer to non ERC721Receiver implementer"
    );
  }

  /**
   * @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`),
   * and stop existing when they are burned (`_burn`).
   */
  function _exists(uint256 tokenId) internal view virtual returns (bool) {
    return _owners[tokenId] != address(0);
  }

  /**
   * @dev Returns whether `spender` is allowed to manage `tokenId`.
   *
   * Requirements:
   *
   * - `tokenId` must exist.
   */
  function _isApprovedOrOwner(address spender, uint256 tokenId)
    internal
    view
    virtual
    returns (bool)
  {
    address owner = WTFERC721.ownerOf(tokenId);
    return (spender == owner ||
      isApprovedForAll(owner, spender) ||
      getApproved(tokenId) == spender);
  }

  /**
   * @dev Safely mints `tokenId` and transfers it to `to`.
   *
   * Requirements:
   *
   * - `tokenId` must not exist.
   * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
   *
   * Emits a {Transfer} event.
   */
  function _safeMint(address to, uint256 tokenId) internal virtual {
    _safeMint(to, tokenId, "");
  }

  /**
   * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
   * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
   */
  function _safeMint(
    address to,
    uint256 tokenId,
    bytes memory data
  ) internal virtual {
    _mint(to, tokenId);
    require(
      _checkOnERC721Received(address(0), to, tokenId, data),
      "ERC721: transfer to non ERC721Receiver implementer"
    );
  }

  /**
   * @dev Mints `tokenId` and transfers it to `to`.
   *
   * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
   *
   * Requirements:
   *
   * - `tokenId` must not exist.
   * - `to` cannot be the zero address.
   *
   * Emits a {Transfer} event.
   */
  function _mint(address to, uint256 tokenId) internal virtual {
    require(to != address(0), "ERC721: mint to the zero address");
    require(!_exists(tokenId), "ERC721: token already minted");

    _beforeTokenTransfer(address(0), to, tokenId);

    _balances[to] += 1;
    _owners[tokenId] = to;

    emit Transfer(address(0), to, tokenId);
  }

  /**
   * @dev Destroys `tokenId`.
   * The approval is cleared when the token is burned.
   *
   * Requirements:
   *
   * - `tokenId` must exist.
   *
   * Emits a {Transfer} event.
   */
  function _burn(uint256 tokenId) internal virtual {
    address owner = WTFERC721.ownerOf(tokenId);

    _beforeTokenTransfer(owner, address(0), tokenId);

    // Clear approvals
    _approve(address(0), tokenId);

    _balances[owner] -= 1;
    delete _owners[tokenId];

    emit Transfer(owner, address(0), tokenId);
  }

  /**
   * @dev Transfers `tokenId` from `from` to `to`.
   *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
   *
   * 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
  ) internal virtual {
    require(WTFERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
    require(to != address(0), "ERC721: transfer to the zero address");

    _beforeTokenTransfer(from, to, tokenId);

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

    _balances[from] -= 1;
    _balances[to] += 1;
    _owners[tokenId] = to;

    emit Transfer(from, to, tokenId);
  }

  /**
   * @dev Approve `to` to operate on `tokenId`
   *
   * Emits an {Approval} event.
   */
  function _approve(address to, uint256 tokenId) internal virtual {
    _tokenApprovals[tokenId] = to;
    emit Approval(WTFERC721.ownerOf(tokenId), to, tokenId);
  }

  /**
   * @dev Approve `operator` to operate on all of `owner` tokens
   *
   * Emits an {ApprovalForAll} event.
   */
  function _setApprovalForAll(
    address owner,
    address operator,
    bool approved
  ) internal virtual {
    require(owner != operator, "ERC721: approve to caller");
    _operatorApprovals[owner][operator] = approved;
    emit ApprovalForAll(owner, operator, approved);
  }

  /**
   * @dev Reverts if the `tokenId` has not been minted yet.
   */
  function _requireMinted(uint256 tokenId) internal view virtual {
    require(_exists(tokenId), "ERC721: invalid token ID");
  }

  /**
   * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
   * The call is not executed if the target address is not a 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 _checkOnERC721Received(
    address from,
    address to,
    uint256 tokenId,
    bytes memory data
  ) private returns (bool) {
    if (to.isContract()) {
      try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (
        bytes4 retval
      ) {
        return retval == IERC721Receiver.onERC721Received.selector;
      } catch (bytes memory reason) {
        if (reason.length == 0) {
          revert("ERC721: transfer to non ERC721Receiver implementer");
        } else {
          /// @solidity memory-safe-assembly
          assembly {
            revert(add(32, reason), mload(reason))
          }
        }
      }
    } else {
      return true;
    }
  }

  /**
   * @dev Hook that is called before any token transfer. This includes minting
   * and burning.
   *
   * 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, ``from``'s `tokenId` will be burned.
   * - `from` and `to` are never both zero.
   *
   * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
   */
  function _beforeTokenTransfer(
    address from,
    address to,
    uint256 tokenId
  ) internal virtual {}
}

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