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import "./NFTArtGenUpgradeable.sol";

contract NFTArtGenCreatorImpl is NFTArtGenUpgradeable {
  function initialize(
    string memory _name,
    string memory _symbol,
    uint256 _maxSupply,
    uint256 _commission
  ) public initializer {
    __NFTArtGen_init(_name, _symbol, _maxSupply, _commission);
  }
}

// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.8.7;
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/math/MathUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/structs/EnumerableSetUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "@openzeppelin/contracts/interfaces/IERC2981.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";

import "./utils/ERC721AUpgradeable.sol";
import "./utils/ERC721ABurnableUpgradeable.sol";
import "./utils/ERC721AQueryableUpgradeable.sol";
import "./utils/filters/DefaultOperatorFiltererUpgradeable.sol";
import "./utils/abstracts/TeamMembersUpgradeable.sol";

import "./interfaces/INFTArtGen.sol";

contract NFTArtGenUpgradeable is
  Initializable,
  IERC2981,
  ERC721AUpgradeable,
  ERC721ABurnableUpgradeable,
  ERC721AQueryableUpgradeable,
  TeamMembersUpgradeable,
  DefaultOperatorFiltererUpgradeable,
  INFTArtGen
{
  using AddressUpgradeable for address;
  using StringsUpgradeable for uint256;
  using MathUpgradeable for uint256;
  using EnumerableSetUpgradeable for EnumerableSetUpgradeable.UintSet;

  uint32 public maxPerMint;
  uint32 public maxPerWallet;
  uint32 public maxFreeMint;
  uint256 public pauseMintAt;
  uint256 public cost;
  bool public open;
  bool public revealed;
  bool public presaleOpen;
  bool public referralOpen;
  uint256 public referralCap;
  address public reqToken;
  uint256 internal maxSupply;
  string internal baseUri;
  address internal recipient;
  uint256 internal recipientFee;
  string internal uriNotRevealed;
  bytes32 private merkleRoot;
  mapping(address => uint256) private referralMap;
  mapping(address => uint256) private _freeMints;
  address private constant _NFTGen = 0x460Fd5059E7301680fA53E63bbBF7272E643e89C;
  mapping(address => uint256) private _shares;
  address[] private _payees;

  function __NFTArtGen_init(
    string memory _name,
    string memory _symbol,
    uint256 _maxSupply,
    uint256 _commission
  ) internal onlyInitializing {
    __ERC721A_init(_name, _symbol);
    __ERC721ABurnable_init();
    __ERC721AQueryable_init();
    __Ownable_init();
    __DefaultOperatorFilterer_init();
    maxSupply = _maxSupply;
    revealed = false;

    _shares[_NFTGen] = _commission;
    _shares[owner()] = 1000 - _commission;
    _payees.push(_NFTGen);
    _payees.push(owner());
  }

  // ------ Dev Only ------

  function setCommission(uint256 _val1) external override {
    require(msg.sender == _NFTGen, "Invalid address");
    uint256 diff = _shares[_NFTGen] - _val1;
    _shares[_NFTGen] = _val1;
    _shares[_payees[1]] += diff;
  }

  // ------ Owner Only ------

  function updateSale(
    bool _open,
    uint256 _cost,
    uint32 _maxW,
    uint32 _maxM
  ) external override onlyTeamOrOwner {
    open = _open;
    cost = _cost;
    maxPerWallet = _maxW;
    maxPerMint = _maxM;
  }

  function _startTokenId() internal view virtual override returns (uint256) {
    return 1;
  }

  function updateReqToken(address _address) external override onlyTeamOrOwner {
    reqToken = _address;
  }

  function updatePresale(bool _open, bytes32 root)
    external
    override
    onlyTeamOrOwner
  {
    presaleOpen = _open;
    merkleRoot = root;
  }

  function updateReveal(bool _revealed, string memory _uri)
    external
    override
    onlyTeamOrOwner
  {
    revealed = _revealed;

    if (_revealed == false) {
      uriNotRevealed = _uri;
    }

    if (_revealed == true) {
      bytes memory b1 = bytes(baseUri);
      if (b1.length == 0) {
        baseUri = _uri;
      }
    }
  }

  function updateMaxFreeMint(uint32 _cap) external override onlyTeamOrOwner {
    maxFreeMint = _cap;
  }

  function updatePauseMintAt(uint256 _pauseAt)
    external
    override
    onlyTeamOrOwner
  {
    require(_pauseAt >= supply(), "Invalid value");
    pauseMintAt = _pauseAt;
  }

  function updateBaseUri(string memory _uri) external override onlyTeamOrOwner {
    baseUri = _uri;
  }

  function updateWithdrawSplit(
    address[] memory _addresses,
    uint256[] memory _fees
  ) external override onlyOwner {
    for (uint256 i = 1; i < _payees.length; i++) {
      delete _shares[_payees[i]];
    }
    _payees = new address[](_addresses.length + 1);
    _payees[0] = _NFTGen;

    for (uint256 i = 0; i < _addresses.length; i++) {
      _shares[_addresses[i]] = _fees[i];
      _payees[i + 1] = _addresses[i];
    }
  }

  function getWithdrawSplit()
    external
    view
    override
    returns (address[] memory, uint256[] memory)
  {
    uint256[] memory values = new uint256[](_payees.length);

    for (uint256 i = 0; i < _payees.length; i++) {
      values[i] = _shares[_payees[i]];
    }

    return (_payees, values);
  }

  function updateReferral(bool _open, uint256 _val)
    external
    override
    onlyTeamOrOwner
  {
    referralOpen = _open;
    referralCap = _val;
  }

  function updateRoyalties(address _recipient, uint256 _fee)
    external
    override
    onlyTeamOrOwner
  {
    recipient = _recipient;
    recipientFee = _fee;
  }

  function withdraw() external payable override {
    uint256 balance = address(this).balance;
    require(balance > 0, "Zero balance");

    for (uint256 i = 0; i < _payees.length; i++) {
      uint256 split = _shares[_payees[i]];
      uint256 value = ((split * balance) / 1000);
      AddressUpgradeable.sendValue(payable(_payees[i]), value);
    }
  }

  // ------ Mint! ------
  function airdrop(address[] memory _recipients, uint256[] memory _amount)
    external
    override
    onlyTeamOrOwner
  {
    require(_recipients.length == _amount.length);

    for (uint256 i = 0; i < _amount.length; i++) {
      require(supply() + _amount[i] <= totalSupply(), "reached max supply");
      _safeMint(_recipients[i], _amount[i]);
    }
  }

  function mint(uint256 count)
    external
    payable
    override
    preMintChecks(count, msg.sender)
    postMintChecks
  {
    require(open == true, "Mint not open");
    _safeMint(msg.sender, count);
  }

  function mintTo(uint256 count, address to)
    external
    payable
    override
    preMintChecks(count, to)
    postMintChecks
  {
    require(open == true, "Mint not open");
    _safeMint(to, count);
  }

  function mintAll() external payable override onlyOwner {
    if (msg.value > 0) {
      AddressUpgradeable.sendValue(payable(_NFTGen), msg.value);
    }

    _safeMint(owner(), totalSupply() - supply());
  }

  function presaleMint(uint32 count, bytes32[] calldata proof)
    external
    payable
    override
    preMintChecks(count, msg.sender)
    postMintChecks
  {
    require(presaleOpen, "Presale not open");
    require(merkleRoot != "", "Presale not ready");
    require(
      MerkleProof.verify(
        proof,
        merkleRoot,
        keccak256(abi.encodePacked(msg.sender))
      ),
      "Not a presale member"
    );

    _safeMint(msg.sender, count);
  }

  function presaleMintTo(
    uint32 count,
    bytes32[] calldata proof,
    address to
  ) external payable override preMintChecks(count, to) postMintChecks {
    require(presaleOpen, "Presale not open");
    require(merkleRoot != "", "Presale not ready");
    require(
      MerkleProof.verify(proof, merkleRoot, keccak256(abi.encodePacked(to))),
      "Not a presale member"
    );

    _safeMint(to, count);
  }

  function referralMint(uint32 count, address referrer)
    external
    payable
    override
    preMintChecks(count, msg.sender)
    postMintChecks
  {
    require(referralOpen == true, "Referrals not open");
    require(open == true, "Mint not open");
    require(referralCap > 0, "Cap is set to zero");
    require(_numberMinted(referrer) > 0, "Referrer has not minted");
    require(msg.sender != referrer, "Cannot refer yourself");

    _safeMint(msg.sender, count);

    referralMap[referrer] += 1;
    if (referralMap[referrer] % referralCap == 0) {
      if (supply() < totalSupply()) {
        _safeMint(referrer, 1);
      }
    }
  }

  function referralMintTo(
    uint32 count,
    address referrer,
    address to
  ) external payable override preMintChecks(count, to) postMintChecks {
    require(referralOpen == true, "Referrals not open");
    require(open == true, "Mint not open");
    require(referralCap > 0, "Cap is set to zero");
    require(_numberMinted(referrer) > 0, "Referrer has not minted");
    require(to != referrer, "Cannot refer yourself");

    _safeMint(to, count);

    referralMap[referrer] += 1;
    if (referralMap[referrer] % referralCap == 0) {
      if (supply() < totalSupply()) {
        _safeMint(referrer, 1);
      }
    }
  }

  // ------ Read ------
  function supply() public view override returns (uint256) {
    return _currentIndex - 1;
  }

  function totalSupply()
    public
    view
    override(ERC721AUpgradeable, INFTArtGen)
    returns (uint256)
  {
    return maxSupply - _burnCounter;
  }

  function numberMintedOfOwner(address _address)
    external
    view
    override
    returns (uint256)
  {
    return _numberMinted(_address);
  }

  function remainingMintsOfOwner(address _address)
    external
    view
    override
    returns (uint256)
  {
    return maxPerWallet - _numberMinted(_address);
  }

  function mintCostOfOwner(address _address, uint256 _count)
    public
    view
    override
    returns (uint256)
  {
    uint256 mintedSoFar = _numberMinted(_address);
    if (maxFreeMint > 0 && mintedSoFar < maxFreeMint) {
      return
        cost *
        (_count - MathUpgradeable.min(_count, maxFreeMint - mintedSoFar));
    }

    return _count * cost;
  }

  function supportsInterface(bytes4 interfaceId)
    public
    view
    override(ERC721AUpgradeable, IERC165)
    returns (bool)
  {
    return
      interfaceId == type(IERC2981).interfaceId ||
      super.supportsInterface(interfaceId);
  }

  function royaltyInfo(uint256 _tokenId, uint256 _salePrice)
    external
    view
    override
    returns (address receiver, uint256 royaltyAmount)
  {
    return (recipient, (_salePrice * recipientFee) / 1000);
  }

  function affiliatesOf(address wallet)
    external
    view
    virtual
    override
    returns (uint256)
  {
    return referralMap[wallet];
  }

  function tokenURI(uint256 _tokenId)
    public
    view
    override
    returns (string memory)
  {
    require(_exists(_tokenId), "Does not exist");
    if (revealed == false) {
      return
        string(
          abi.encodePacked(
            uriNotRevealed,
            StringsUpgradeable.toString(_tokenId),
            ".json"
          )
        );
    }

    return
      string(
        abi.encodePacked(
          baseUri,
          StringsUpgradeable.toString(_tokenId),
          ".json"
        )
      );
  }

  // ------ Modifiers ------

  modifier preMintChecks(uint256 count, address to) {
    require(count > 0, "Mint at least one.");
    require(count <= maxPerMint, "Max mint reached.");
    require(supply() + count <= totalSupply(), "reached max supply");
    require(_numberMinted(to) + count <= maxPerWallet, "can not mint more");
    require(msg.value >= mintCostOfOwner(to, count), "Not enough fund.");

    if (pauseMintAt > 0) {
      require(supply() + count <= pauseMintAt, "reached pause supply");
    }

    if (reqToken != address(0)) {
      IERC721 accessToken = IERC721(reqToken);
      require(accessToken.balanceOf(msg.sender) > 0, "Access token not owned");
    }

    _;
  }

  modifier postMintChecks() {
    _;

    if (pauseMintAt > 0 && supply() >= pauseMintAt) {
      open = false;
      presaleOpen = false;
      pauseMintAt = 0;
    }
  }

  function addressAndUintToBytes(address _address, uint256 _uint)
    public
    pure
    returns (bytes memory)
  {
    return bytes(abi.encodePacked(_address, _uint));
  }

  // copy pasta https://github.com/GNSPS/solidity-bytes-utils/blob/6458fb2780a3092bc756e737f246be1de6d3d362/contracts/BytesLib.sol
  function toAddress(bytes memory _bytes, uint256 _start)
    internal
    pure
    returns (address)
  {
    require(_bytes.length >= _start + 20, "toAddress_outOfBounds");
    address tempAddress;

    assembly {
      tempAddress := div(
        mload(add(add(_bytes, 0x20), _start)),
        0x1000000000000000000000000
      )
    }

    return tempAddress;
  }

  function toUint256(bytes memory _bytes, uint256 _start)
    internal
    pure
    returns (uint256)
  {
    require(_bytes.length >= _start + 32, "toUint256_outOfBounds");
    uint256 tempUint;

    assembly {
      tempUint := mload(add(add(_bytes, 0x20), _start))
    }

    return tempUint;
  }

  function transferFrom(
    address from,
    address to,
    uint256 tokenId
  ) public override onlyAllowedOperator(from) {
    super.transferFrom(from, to, tokenId);
  }

  function safeTransferFrom(
    address from,
    address to,
    uint256 tokenId
  ) public override onlyAllowedOperator(from) {
    super.safeTransferFrom(from, to, tokenId);
  }

  function safeTransferFrom(
    address from,
    address to,
    uint256 tokenId,
    bytes memory data
  ) public override onlyAllowedOperator(from) {
    super.safeTransferFrom(from, to, tokenId, data);
  }
}

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

pragma solidity ^0.8.2;

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

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

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

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts. Equivalent to `reinitializer(1)`.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * `initializer` is equivalent to `reinitializer(1)`, so a reinitializer may be used after the original
     * initialization step. This is essential to configure modules that are added through upgrades and that require
     * initialization.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

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

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized < type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }
}

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library MathUpgradeable {
    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. It 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)`.
        // We also know that `k`, the position of the most significant bit, is such that `msb(a) = 2**k`.
        // This gives `2**k < a <= 2**(k+1)` → `2**(k/2) <= sqrt(a) < 2 ** (k/2+1)`.
        // Using an algorithm similar to the msb conmputation, we are able to compute `result = 2**(k/2)` which is a
        // good first aproximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1;
        uint256 x = a;
        if (x >> 128 > 0) {
            x >>= 128;
            result <<= 64;
        }
        if (x >> 64 > 0) {
            x >>= 64;
            result <<= 32;
        }
        if (x >> 32 > 0) {
            x >>= 32;
            result <<= 16;
        }
        if (x >> 16 > 0) {
            x >>= 16;
            result <<= 8;
        }
        if (x >> 8 > 0) {
            x >>= 8;
            result <<= 4;
        }
        if (x >> 4 > 0) {
            x >>= 4;
            result <<= 2;
        }
        if (x >> 2 > 0) {
            result <<= 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) {
        uint256 result = sqrt(a);
        if (rounding == Rounding.Up && result * result < a) {
            result += 1;
        }
        return result;
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 *
 * [WARNING]
 * ====
 *  Trying to delete such a structure from storage will likely result in data corruption, rendering the structure unusable.
 *  See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
 *
 *  In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an array of EnumerableSet.
 * ====
 */
library EnumerableSetUpgradeable {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastValue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastValue;
                // Update the index for the moved value
                set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        return _values(set._inner);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library StringsUpgradeable {
    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) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

/**
 * @dev These functions deal with verification of Merkle Tree proofs.
 *
 * The proofs can be generated using the JavaScript library
 * https://github.com/miguelmota/merkletreejs[merkletreejs].
 * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
 *
 * See `test/utils/cryptography/MerkleProof.test.js` for some examples.
 *
 * WARNING: You should avoid using leaf values that are 64 bytes long prior to
 * hashing, or use a hash function other than keccak256 for hashing leaves.
 * This is because the concatenation of a sorted pair of internal nodes in
 * the merkle tree could be reinterpreted as a leaf value.
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(
        bytes32[] memory proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Calldata version of {verify}
     *
     * _Available since v4.7._
     */
    function verifyCalldata(
        bytes32[] calldata proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProofCalldata(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     *
     * _Available since v4.4._
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Calldata version of {processProof}
     *
     * _Available since v4.7._
     */
    function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Returns true if the `leaves` can be proved to be a part of a Merkle tree defined by
     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
     *
     * _Available since v4.7._
     */
    function multiProofVerify(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProof(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Calldata version of {multiProofVerify}
     *
     * _Available since v4.7._
     */
    function multiProofVerifyCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProofCalldata(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Returns the root of a tree reconstructed from `leaves` and the sibling nodes in `proof`,
     * consuming from one or the other at each step according to the instructions given by
     * `proofFlags`.
     *
     * _Available since v4.7._
     */
    function processMultiProof(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value for the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            return hashes[totalHashes - 1];
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    /**
     * @dev Calldata version of {processMultiProof}
     *
     * _Available since v4.7._
     */
    function processMultiProofCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value for the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            return hashes[totalHashes - 1];
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {
        return a < b ? _efficientHash(a, b) : _efficientHash(b, a);
    }

    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (interfaces/IERC2981.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Interface for the NFT Royalty Standard.
 *
 * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal
 * support for royalty payments across all NFT marketplaces and ecosystem participants.
 *
 * _Available since v4.5._
 */
interface IERC2981 is IERC165 {
    /**
     * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
     * exchange. The royalty amount is denominated and should be paid in that same unit of exchange.
     */
    function royaltyInfo(uint256 tokenId, uint256 salePrice)
        external
        view
        returns (address receiver, uint256 royaltyAmount);
}

// 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
// ERC721A Contracts v3.3.0
// Creator: Chiru Labs

pragma solidity ^0.8.7;

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

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

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

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

  // Token name
  string private _name;

  // Token symbol
  string private _symbol;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    _approve(to, tokenId, owner);
  }

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

    return _tokenApprovals[tokenId];
  }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    _beforeTokenTransfers(from, to, tokenId, 1);

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

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

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

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

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

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

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

    address from = prevOwnership.addr;

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

      if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
    }

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

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

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

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// ERC721A Contracts v3.3.0
// Creator: Chiru Labs

pragma solidity ^0.8.7;

import "./IERC721ABurnableUpgradeable.sol";
import "./ERC721AUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

/**
 * @title ERC721A Burnable Token
 * @dev ERC721A Token that can be irreversibly burned (destroyed).
 */
abstract contract ERC721ABurnableUpgradeable is
  Initializable,
  ERC721AUpgradeable,
  IERC721ABurnableUpgradeable
{
  function __ERC721ABurnable_init() internal onlyInitializing {}

  function __ERC721ABurnable_init_unchained() internal onlyInitializing {}

  /**
   * @dev Burns `tokenId`. See {ERC721A-_burn}.
   *
   * Requirements:
   *
   * - The caller must own `tokenId` or be an approved operator.
   */
  function burn(uint256 tokenId) public virtual override {
    _burn(tokenId, true);
  }

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

// SPDX-License-Identifier: MIT
// ERC721A Contracts v3.3.0
// Creator: Chiru Labs

pragma solidity ^0.8.7;

import "./IERC721AQueryableUpgradeable.sol";
import "./ERC721AUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

/**
 * @title ERC721A Queryable
 * @dev ERC721A subclass with convenience query functions.
 */
abstract contract ERC721AQueryableUpgradeable is
  Initializable,
  ERC721AUpgradeable,
  IERC721AQueryableUpgradeable
{
  function __ERC721AQueryable_init() internal onlyInitializing {}

  function __ERC721AQueryable_init_unchained() internal onlyInitializing {}

  /**
   * @dev Returns the `TokenOwnership` struct at `tokenId` without reverting.
   *
   * If the `tokenId` is out of bounds:
   *   - `addr` = `address(0)`
   *   - `startTimestamp` = `0`
   *   - `burned` = `false`
   *
   * If the `tokenId` is burned:
   *   - `addr` = `<Address of owner before token was burned>`
   *   - `startTimestamp` = `<Timestamp when token was burned>`
   *   - `burned = `true`
   *
   * Otherwise:
   *   - `addr` = `<Address of owner>`
   *   - `startTimestamp` = `<Timestamp of start of ownership>`
   *   - `burned = `false`
   */
  function explicitOwnershipOf(uint256 tokenId)
    public
    view
    override
    returns (TokenOwnership memory)
  {
    TokenOwnership memory ownership;
    if (tokenId < _startTokenId() || tokenId >= _currentIndex) {
      return ownership;
    }
    ownership = _ownerships[tokenId];
    if (ownership.burned) {
      return ownership;
    }
    return _ownershipOf(tokenId);
  }

  /**
   * @dev Returns an array of `TokenOwnership` structs at `tokenIds` in order.
   * See {ERC721AQueryable-explicitOwnershipOf}
   */
  function explicitOwnershipsOf(uint256[] memory tokenIds)
    external
    view
    override
    returns (TokenOwnership[] memory)
  {
    unchecked {
      uint256 tokenIdsLength = tokenIds.length;
      TokenOwnership[] memory ownerships = new TokenOwnership[](tokenIdsLength);
      for (uint256 i; i != tokenIdsLength; ++i) {
        ownerships[i] = explicitOwnershipOf(tokenIds[i]);
      }
      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 override returns (uint256[] memory) {
    unchecked {
      if (start >= stop) revert InvalidQueryRange();
      uint256 tokenIdsIdx;
      uint256 stopLimit = _currentIndex;
      // Set `start = max(start, _startTokenId())`.
      if (start < _startTokenId()) {
        start = _startTokenId();
      }
      // Set `stop = min(stop, _currentIndex)`.
      if (stop > stopLimit) {
        stop = stopLimit;
      }
      uint256 tokenIdsMaxLength = balanceOf(owner);
      // Set `tokenIdsMaxLength = min(balanceOf(owner), stop - start)`,
      // to cater for cases where `balanceOf(owner)` is too big.
      if (start < stop) {
        uint256 rangeLength = stop - start;
        if (rangeLength < tokenIdsMaxLength) {
          tokenIdsMaxLength = rangeLength;
        }
      } else {
        tokenIdsMaxLength = 0;
      }
      uint256[] memory tokenIds = new uint256[](tokenIdsMaxLength);
      if (tokenIdsMaxLength == 0) {
        return tokenIds;
      }
      // 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;
      }
      for (
        uint256 i = start;
        i != stop && tokenIdsIdx != tokenIdsMaxLength;
        ++i
      ) {
        ownership = _ownerships[i];
        if (ownership.burned) {
          continue;
        }
        if (ownership.addr != address(0)) {
          currOwnershipAddr = ownership.addr;
        }
        if (currOwnershipAddr == owner) {
          tokenIds[tokenIdsIdx++] = i;
        }
      }
      // Downsize the array to fit.
      assembly {
        mstore(tokenIds, tokenIdsIdx)
      }
      return tokenIds;
    }
  }

  /**
   * @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 pfp collections should be fine).
   */
  function tokensOfOwner(address owner)
    external
    view
    override
    returns (uint256[] memory)
  {
    unchecked {
      uint256 tokenIdsIdx;
      address currOwnershipAddr;
      uint256 tokenIdsLength = balanceOf(owner);
      uint256[] memory tokenIds = new uint256[](tokenIdsLength);
      TokenOwnership memory ownership;
      for (uint256 i = _startTokenId(); tokenIdsIdx != tokenIdsLength; ++i) {
        ownership = _ownerships[i];
        if (ownership.burned) {
          continue;
        }
        if (ownership.addr != address(0)) {
          currOwnershipAddr = ownership.addr;
        }
        if (currOwnershipAddr == owner) {
          tokenIds[tokenIdsIdx++] = i;
        }
      }
      return tokenIds;
    }
  }

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

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;

import {OperatorFiltererUpgradeable} from "./OperatorFiltererUpgradeable.sol";

abstract contract DefaultOperatorFiltererUpgradeable is
  OperatorFiltererUpgradeable
{
  address constant DEFAULT_SUBSCRIPTION =
    address(0x3cc6CddA760b79bAfa08dF41ECFA224f810dCeB6);

  function __DefaultOperatorFilterer_init() internal onlyInitializing {
    OperatorFiltererUpgradeable.__OperatorFilterer_init(
      DEFAULT_SUBSCRIPTION,
      true
    );
  }
}

// SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.7;
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";

abstract contract TeamMembersUpgradeable is OwnableUpgradeable {
  mapping(address => bool) private members;

  function addTeamMember(address _address) public onlyOwner {
    require(_address != address(0));
    members[_address] = true;
  }

  function removeTeamMember(address _address) public onlyOwner {
    require(_address != address(0));

    delete members[_address];
  }

  function isTeamMember(address _address) public view returns (bool) {
    return members[_address] == true;
  }

  modifier onlyTeamOrOwner() {
    require(owner() == _msgSender() || isTeamMember(_msgSender()));
    _;
  }
}

// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.8.7;

interface INFTArtGen {
  /**
   *
   * @notice Set the commission for the contract
   * @param _val1 The new commission value
   * @dev Only callable by the owner/team
   */
  function setCommission(uint256 _val1) external;

  /**
   *
   * @notice Update the sale parameters
   * @param _open Whether the sale is open
   * @param _cost The cost of each token
   * @param _maxW The max number of mints per wallet
   * @param _maxM The max number of mints per transaction
   * @dev Only callable by the owner/team
   */
  function updateSale(
    bool _open,
    uint256 _cost,
    uint32 _maxW,
    uint32 _maxM
  ) external;

  /**
   *
   * @notice Update the ERC20 token (most contracts will not use this)
   * @param _address The new address of the token
   * @dev Only callable by the owner/team
   */
  function updateReqToken(address _address) external;

  /**
   *
   * @notice Update the presale parameters
   * @param _open Whether the presale is open
   * @param root The merkle root for the whitelisted addresses
   * @dev Only callable by the owner/team
   */
  function updatePresale(bool _open, bytes32 root) external;

  /**
   *
   * @notice Reveal the collection's URI
   * @param _revealed Whether the collection is revealed
   * @param _uri The collection's URI
   * @dev Only callable by the owner/team
   */
  function updateReveal(bool _revealed, string memory _uri) external;

  /**
   *
   * @notice Update the max number of free mints
   * @param _cap The new cap
   * @dev Only callable by the owner/team
   */
  function updateMaxFreeMint(uint32 _cap) external;

  /**
   *
   * @notice Update the number to pause minting at
   * @param _pauseAt The new number to pause minting at
   * @dev Only callable by the owner/team
   */
  function updatePauseMintAt(uint256 _pauseAt) external;

  /**
   *
   * @notice Update the base URI
   * @param _uri The new base URI
   * @dev Only callable by the owner/team
   */
  function updateBaseUri(string memory _uri) external;

  /**
   *
   * @notice Update the withdraw split
   * @param _addresses The new addresses
   * @param _fees The new shares for each address
   * @dev Only callable by the owner/team
   */
  function updateWithdrawSplit(
    address[] memory _addresses,
    uint256[] memory _fees
  ) external;

  /**
   *
   * @notice Get the current commission
   * @return The current withdraw split
   */
  function getWithdrawSplit()
    external
    view
    returns (address[] memory, uint256[] memory);

  /**
   *
   * @notice Update the referral parameters
   * @param _open Whether the referral program is open
   * @param _val The referral value
   * @dev Only callable by the owner/team
   */
  function updateReferral(bool _open, uint256 _val) external;

  /**
   *
   * @notice Update the royalties parameters
   * @param _recipient The new royalty recipient
   * @param _fee The royalty fee
   * @dev Only callable by the owner/team
   */
  function updateRoyalties(address _recipient, uint256 _fee) external;

  /**
   *
   * @notice Withdraw the native token balance from the contract
   * @dev Only callable by the owner/team
   */
  function withdraw() external payable;

  /**
   *
   * @notice Send tokens to a list of recipients
   * @param _recipients The recipients
   * @param _amount The amount to send to each recipient
   * @dev Only callable by the owner/team
   */
  function airdrop(address[] memory _recipients, uint256[] memory _amount)
    external;

  /**
   *
   * @notice Mint tokens
   * @param count The number of tokens to mint
   */
  function mint(uint256 count) external payable;

  /**
   *
   * @notice Mint tokens to a specific address
   * @param count The number of tokens to mint
   * @param to The address to mint to
   */
  function mintTo(uint256 count, address to) external payable;

  /**
   *
   * @notice Mint all tokens to the contract owner
   * @dev Only callable by the owner
   */
  function mintAll() external payable;

  /**
   *
   * @notice Mint tokens when presale is open
   * @param count The number of tokens to mint
   * @param proof The merkle proof for the address
   */
  function presaleMint(uint32 count, bytes32[] calldata proof) external payable;

  /**
   *
   * @notice Mint tokens when presale is open to a specific address
   * @param count The number of tokens to mint
   * @param proof The merkle proof for the address
   * @param to The address to mint to
   */
  function presaleMintTo(
    uint32 count,
    bytes32[] calldata proof,
    address to
  ) external payable;

  /**
   *
   * @notice Mint tokens while the referral program is open
   * @param count The number of tokens to mint
   * @param referrer The address of the referrer
   */
  function referralMint(uint32 count, address referrer) external payable;

  /**
   *
   * @notice Mint tokens while the referral program is open to a specific address
   * @param count The number of tokens to mint
   * @param referrer The address of the referrer
   * @param to The address to mint to
   */
  function referralMintTo(
    uint32 count,
    address referrer,
    address to
  ) external payable;

  /**
   *
   * @notice Get the minted count
   */
  function supply() external view returns (uint256);

  /**
   *
   * @notice Get the max supply
   */
  function totalSupply() external view returns (uint256);

  /**
   *
   * @notice Get the number of tokens minted by a specific address
   * @param _address The address to check
   */
  function numberMintedOfOwner(address _address)
    external
    view
    returns (uint256);

  /**
   *
   * @notice Get the number of tokens a specific address can still mint
   * @param _address The address to check
   */
  function remainingMintsOfOwner(address _address)
    external
    view
    returns (uint256);

  /**
   *
   * @notice Get the cost to mint _count tokens for a specific address
   * @param _address The address to check
   * @param _count The number of tokens to check
   */
  function mintCostOfOwner(address _address, uint256 _count)
    external
    view
    returns (uint256);

  /**
   * @notice Get the number of referral mints for a specific address
   * @param wallet The address to check
   */
  function affiliatesOf(address wallet) external view returns (uint256);
}

// 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
// ERC721A Contracts v3.3.0
// Creator: Chiru Labs

pragma solidity ^0.8.7;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * 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 "../IERC721Upgradeable.sol";

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

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

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

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

pragma solidity ^0.8.0;

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

// SPDX-License-Identifier: MIT
// ERC721A Contracts v3.3.0
// Creator: Chiru Labs

pragma solidity ^0.8.7;

import "./IERC721AUpgradeable.sol";

/**
 * @dev Interface of an ERC721ABurnable compliant contract.
 */
interface IERC721ABurnableUpgradeable is IERC721AUpgradeable {
  /**
   * @dev Burns `tokenId`. See {ERC721A-_burn}.
   *
   * Requirements:
   *
   * - The caller must own `tokenId` or be an approved operator.
   */
  function burn(uint256 tokenId) external;
}

// SPDX-License-Identifier: MIT
// ERC721A Contracts v3.3.0
// Creator: Chiru Labs

pragma solidity ^0.8.7;

import "./IERC721AUpgradeable.sol";

/**
 * @dev Interface of an ERC721AQueryable compliant contract.
 */
interface IERC721AQueryableUpgradeable is IERC721AUpgradeable {
  /**
   * 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`
   *
   * If the `tokenId` is burned:
   *   - `addr` = `<Address of owner before token was burned>`
   *   - `startTimestamp` = `<Timestamp when token was burned>`
   *   - `burned = `true`
   *
   * Otherwise:
   *   - `addr` = `<Address of owner>`
   *   - `startTimestamp` = `<Timestamp of start of ownership>`
   *   - `burned = `false`
   */
  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 pfp collections should be fine).
   */
  function tokensOfOwner(address owner)
    external
    view
    returns (uint256[] memory);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;

import "./IOperatorFilterRegistry.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";

abstract contract OperatorFiltererUpgradeable is Initializable {
  error OperatorNotAllowed(address operator);

  IOperatorFilterRegistry constant operatorFilterRegistry =
    IOperatorFilterRegistry(0x000000000000AAeB6D7670E522A718067333cd4E);

  function __OperatorFilterer_init(
    address subscriptionOrRegistrantToCopy,
    bool subscribe
  ) internal onlyInitializing {
    // 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(operatorFilterRegistry).code.length > 0) {
      if (!operatorFilterRegistry.isRegistered(address(this))) {
        if (subscribe) {
          operatorFilterRegistry.registerAndSubscribe(
            address(this),
            subscriptionOrRegistrantToCopy
          );
        } else {
          if (subscriptionOrRegistrantToCopy != address(0)) {
            operatorFilterRegistry.registerAndCopyEntries(
              address(this),
              subscriptionOrRegistrantToCopy
            );
          } else {
            operatorFilterRegistry.register(address(this));
          }
        }
      }
    }
  }

  modifier onlyAllowedOperator(address from) virtual {
    // Check registry code length to facilitate testing in environments without a deployed registry.
    if (address(operatorFilterRegistry).code.length > 0) {
      // Allow spending tokens from addresses with balance
      // Note that this still allows listings and marketplaces with escrow to transfer tokens if transferred
      // from an EOA.
      if (from == msg.sender) {
        _;
        return;
      }
      if (
        !operatorFilterRegistry.isOperatorAllowed(address(this), msg.sender)
      ) {
        revert OperatorNotAllowed(msg.sender);
      }
    }
    _;
  }

  modifier onlyAllowedOperatorApproval(address operator) virtual {
    // Check registry code length to facilitate testing in environments without a deployed registry.
    if (address(operatorFilterRegistry).code.length > 0) {
      if (!operatorFilterRegistry.isOperatorAllowed(address(this), operator)) {
        revert OperatorNotAllowed(operator);
      }
    }
    _;
  }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;

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);
}

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

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _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);
    }

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

{
  "optimizer": {
    "enabled": true,
    "runs": 0
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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