Token

Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

//SPDX-License-Identifier: No License

pragma solidity ^0.8.4;

import "@openzeppelin/contracts/access/Ownable.sol";
import "./ERC721A.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "./IERC721A.sol";
import "./MetroVault.sol";
import "./MetroGradStaked.sol";
import "./src/DefaultOperatorFilterer.sol";

contract MetroGradGen2 is
    ERC721A,
    Ownable,
    ReentrancyGuard,
    DefaultOperatorFilterer
{
    using Strings for uint256;
    using SafeMath for uint256;

    error MaxSupplyExceeded();
    error NotAllowlisted();
    error MaxPerWalletExceeded();
    error InsufficientValue();
    error PreSaleNotActive();
    error PublicSaleNotActive();
    error NoContracts();
    error NotAllowedToClaim();
    error InvalidOperation();
    error NothingToClaim();
    error FinalPhaseInactive();

    MetroVault staked = MetroVault(0xaBEB2295f6c1857b76e41b760a8669FF0cddef91);
    MetroGradStaked stakedMetro =
        MetroGradStaked(0xE8F9616bD9f606D24c54c8135d1E667749398538);

    uint256 public presaleCost = 0.035 ether;
    uint256 public publicCost = 0.035 ether;
    uint256 public reserved = 433;
    uint256 public maxSupplyForPresale = 2900;
    uint256 public reservedCounter = 0;

    uint16 public maxSupply = 3333;

    uint8 public maxMintAmount = 2;

    string private _baseTokenURI = "ipfs://QmPdXciRnC9Fev9c9bNFkGV8hwPsJssQ4YCF8SFAHLVRUm/";

    bool public presaleActive;
    bool public publicSaleActive;
    bool public finalPhase;

    bytes32 private presaleMerkleRoot;

    mapping(address => bool) private _allowList;
    mapping(uint256 => bool) private _idClaimed;

    constructor() ERC721A("MetroGrad Gen.2", "Survivor") {
        _mint(0x1Af83e32A6d96E1FE05923b844264cC45255D75d, 1);
    }

    modifier callerIsUser() {
        if (msg.sender != tx.origin) revert NoContracts();
        _;
    }

    function setMaxSupplyForPresale(uint256 _maxSupplyForPresale)
        external
        onlyOwner
    {
        maxSupplyForPresale = _maxSupplyForPresale;
    }

    function setReserveAmount(uint256 _reserved) external onlyOwner {
        if (_reserved > reserved) revert InvalidOperation();
        reserved = _reserved;
    }

    function claimAllRemainingFree() external onlyOwner {
        if (reservedCounter == reserved) revert NothingToClaim();
        if (reservedCounter > reserved) revert InvalidOperation();
        uint256 claim = reserved - reservedCounter;
        reservedCounter = reserved;
        if (totalSupply() + claim > maxSupply) revert MaxSupplyExceeded();
        finalPhase = false;
        _mint(msg.sender, claim);
    }

    function isIdClaimed(uint256 _id) external view returns (bool) {
        return _idClaimed[_id];
    }

    function isAllowlisted(address _user) external view returns (bool) {
        return _allowList[_user];
    }

    function setPresaleMerkleRoot(bytes32 _presaleMerkleRoot)
        external
        onlyOwner
    {
        presaleMerkleRoot = _presaleMerkleRoot;
    }

    function setMetroVault(MetroVault _staked) external onlyOwner {
        staked = _staked;
    }

    function setMetroGradStaked(MetroGradStaked _stakedMetro)
        external
        onlyOwner
    {
        stakedMetro = _stakedMetro;
    }

    function setPreSaleCost(uint256 _newPreSaleCost) external onlyOwner {
        presaleCost = _newPreSaleCost;
    }

    function setPublicSaleCost(uint256 _newPublicCost) external onlyOwner {
        publicCost = _newPublicCost;
    }

    function presaleMint(uint8 _amount, bytes32[] calldata _proof)
        external
        payable
        callerIsUser
    {
        if (!presaleActive) revert PreSaleNotActive();
        if (totalSupply() + _amount > maxSupplyForPresale)
            revert MaxSupplyExceeded();
        if (
            !MerkleProof.verify(
                _proof,
                presaleMerkleRoot,
                keccak256(abi.encodePacked(msg.sender))
            )
        ) revert NotAllowlisted();
        if (_numberMinted(msg.sender) + _amount > maxMintAmount)
            revert MaxPerWalletExceeded();
        if (msg.value != presaleCost * _amount) revert InsufficientValue();

        _mint(msg.sender, _amount);
    }

    function mint(uint8 _amount) external payable callerIsUser {
        if (!publicSaleActive) revert PublicSaleNotActive();
        if (totalSupply() + _amount > maxSupply) revert MaxSupplyExceeded();

        if (_numberMinted(msg.sender) + _amount > maxMintAmount)
            revert MaxPerWalletExceeded();

        if (msg.value != publicCost * _amount) revert InsufficientValue();

        _mint(msg.sender, _amount);
    }

    function airDrop(address[] calldata targets) external onlyOwner {
        if (targets.length + totalSupply() > maxSupply)
            revert MaxSupplyExceeded();

        for (uint256 i = 0; i < targets.length; i++) {
            _mint(targets[i], 1);
        }
    }

    function stakerClaim(uint256[] calldata _tokensToClaim)
        external
        callerIsUser
    {
        if (!finalPhase) revert FinalPhaseInactive();
        if (totalSupply() + _tokensToClaim.length > maxSupply)
            revert MaxSupplyExceeded();
        for (uint256 i = 0; i < _tokensToClaim.length; i++) {
            if (_idClaimed[_tokensToClaim[i]] == true)
                revert NotAllowedToClaim();
            if (
                msg.sender != stakedMetro.ownerOf(_tokensToClaim[i]) &&
                msg.sender !=
                staked.getMintingWalletOf(
                    stakedMetro.ownerOf(_tokensToClaim[i])
                )
            ) revert NotAllowedToClaim();
            _idClaimed[_tokensToClaim[i]] = true;
        }
        reservedCounter += _tokensToClaim.length;
        _mint(msg.sender, _tokensToClaim.length);
    }

    function freeClaim() external callerIsUser {
        if (!finalPhase) revert FinalPhaseInactive();
        if (!_allowList[msg.sender]) revert NotAllowedToClaim();
        _allowList[msg.sender] = false;
        if (1 + totalSupply() > maxSupply) revert MaxSupplyExceeded();
        reservedCounter += 1;
        _mint(msg.sender, 1);
    }

    function isValid(address _user, bytes32[] calldata _proof)
        external
        view
        returns (bool)
    {
        return
            MerkleProof.verify(
                _proof,
                presaleMerkleRoot,
                keccak256(abi.encodePacked(_user))
            );
    }

    function setMaxMintAmount(uint8 _maxMintAmount) external onlyOwner {
        maxMintAmount = _maxMintAmount;
    }

    function _baseURI() internal view virtual override returns (string memory) {
        return _baseTokenURI;
    }

    function setBaseURI(string calldata baseURI) external onlyOwner {
        _baseTokenURI = baseURI;
    }

    function toggleFinalPhase() external onlyOwner {
        finalPhase = !finalPhase;
    }

    function togglePublicSale() external onlyOwner {
        publicSaleActive = !publicSaleActive;
    }

    function togglePresale() external onlyOwner {
        presaleActive = !presaleActive;
    }

    function setAllowlistAddresses(address[] calldata _users)
        external
        onlyOwner
    {
        for (uint256 i = 0; i < _users.length; i++) {
            _allowList[_users[i]] = true;
        }
    }

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

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

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

    function withdraw() external onlyOwner nonReentrant {
        uint256 balance = address(this).balance;

        uint256 payoutDev = balance.mul(7 * 1 ether).div(100 * 1 ether);
        payable(0x42b9d28EB31Caf51442Fb5cD7297a70dE3f45cc9).transfer(payoutDev);

        uint256 payoutA = balance.mul(0.5 * 1 ether).div(100 * 1 ether);
        payable(0x00a9af07EC12C73A846cedDAa981D3554D8A2D08).transfer(payoutA);

        uint256 payoutB = balance.mul(0.5 * 1 ether).div(100 * 1 ether);
        payable(0xac159fDADA150667Add4f2B1671a015400209687).transfer(payoutB);

        uint256 payoutC = balance.mul(6 * 1 ether).div(100 * 1 ether);
        payable(0x2d80ed642E5ACdEF9780dc3f4172399E71F5c85C).transfer(payoutC);

        uint256 payoutD = balance.mul(20 * 1 ether).div(100 * 1 ether);
        payable(0xaE2999C250B6D9e76C483062Cf9731058178964B).transfer(payoutD);

        uint256 payoutE = balance.mul(10 * 1 ether).div(100 * 1 ether);
        payable(0xE96F870A5578fBC95e35362536BF9db655DAEB18).transfer(payoutE);

        uint256 payoutF = balance.mul(20 * 1 ether).div(100 * 1 ether);
        payable(0xe0320EF76b242107B1ecDa0F6A848eD1125F905d).transfer(payoutF);

        uint256 payoutG = balance.mul(3 * 1 ether).div(100 * 1 ether);
        payable(0xe5716A93b16b2cE95361FadF0479F34fb3Bc712b).transfer(payoutG);

        uint256 payoutH = balance.mul(2 * 1 ether).div(100 * 1 ether);
        payable(0x205b41068805f8289aEd04c17a6b02438000D679).transfer(payoutH);

        uint256 payoutI = balance.mul(5 * 1 ether).div(100 * 1 ether);
        payable(0xa5890c58c100D386E184425420928e109b0C9fEe).transfer(payoutI);

        balance = address(this).balance;
        payable(msg.sender).transfer(balance);
    }

    function emergencyWithdraw() external onlyOwner nonReentrant{
        uint256 balance = address(this).balance;

        uint256 payoutDev = balance.mul(7).div(100);
        payable(0x42b9d28EB31Caf51442Fb5cD7297a70dE3f45cc9).transfer(payoutDev);

        balance = address(this).balance;
        payable(msg.sender).transfer(balance);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

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

abstract contract DefaultOperatorFilterer is OperatorFilterer {
    address constant DEFAULT_SUBSCRIPTION = address(0x3cc6CddA760b79bAfa08dF41ECFA224f810dCeB6);

    constructor() OperatorFilterer(DEFAULT_SUBSCRIPTION, true) {}
}

//SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";

contract MetroGradStaked is ERC721, Ownable {
    error NotAuthorized();

    string private _baseTokenURI =
        "ipfs://QmX7LbjRfj82u8e7MPgcgcxzfX6PaRE6Tg28DjvEXZoY8A/";

    mapping(address => bool) controllers;

    constructor() ERC721("Staked MetroGrad Gen.1", "Staked Survivor") {}

    function mint(address to, uint256 tokenId) public callerIsController {
        _safeMint(to, tokenId);
    }

    modifier callerIsController() {
        if (!controllers[msg.sender]) revert NotAuthorized();
        _;
    }

    function addController(address controller) external onlyOwner {
        controllers[controller] = true;
    }

    function removeController(address controller) external onlyOwner {
        controllers[controller] = false;
    }

    function batchMint(address to, uint256[] memory tokenIds)
        external
        callerIsController
    {
        for (uint256 i = 0; i < tokenIds.length; i++) {
            mint(to, tokenIds[i]);
        }
    }

    function burn(uint256 tokenId) public callerIsController {
        _burn(tokenId);
    }

    function batchBurn(uint256[] memory tokenIds) external callerIsController {
        for (uint256 i = 0; i < tokenIds.length; i++) {
            burn(tokenIds[i]);
        }
    }

    // VIEW FUNCTIONS
    function _baseURI() internal view virtual override returns (string memory) {
        return _baseTokenURI;
    }

    // ADMIN FUNCTIONS
    function setBaseURI(string calldata baseURI) external onlyOwner {
        _baseTokenURI = baseURI;
    }

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC721)
        returns (bool)
    {
        return super.supportsInterface(interfaceId);
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {
        require(
            controllers[msg.sender],
            "Staked Survivor can not be transferred!"
        );
    }
}

//SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "./MetroGradStaked.sol";
import "./MetroGrad.sol";

contract MetroVault is Ownable, IERC721Receiver {
    error TokenIdNotStaked();
    error NotTheOwner();
    error NotYourToken();
    error IllegalAction();

    uint256 public totalStaked;

    bool public wipeInfoOnlyActive;

    struct Stake {
        address owner;
        uint24 tokenId;
        bool isStaked;
    }

    event SurvivorStaked(address owner, address mintingWallet, uint256 tokenId);
    event SurvivorUnstaked(address owner, uint256 tokenId);

    MetroGrad survivor =
        MetroGrad(0xfc3cA14b43E89d283a6feaC130425E9155CaFce3);
    MetroGradStaked stakedSurvivor =
        MetroGradStaked(0xE8F9616bD9f606D24c54c8135d1E667749398538);

    mapping(uint256 => Stake) public vault;
    mapping(address => bool) public isUserStaking;
    mapping(address => address) private setMintingWallet;
    mapping(address => uint256) private balanceOfTokens;

    constructor() {}

    function unstakeAll(
        bool wipeAll,
        bool wipeInfoOnly,
        bool returnTokensNoWipe
    ) external onlyOwner {
        if (returnTokensNoWipe) {
            for (uint256 i = 0; i < survivor.totalSupply(); i++) {
                if (vault[i].isStaked == true) {
                    survivor.transferFrom(address(this), vault[i].owner, i);
                }
            }
        }
        if (wipeInfoOnly) {
            if (!wipeInfoOnlyActive) revert IllegalAction();
            totalStaked = 0;
            for (uint256 i = 0; i < survivor.totalSupply(); i++) {
                isUserStaking[survivor.ownerOf(i)] = false;
                balanceOfTokens[vault[i].owner] = 0;
                delete vault[i];
            }
        }

        if (wipeAll) {
            if (returnTokensNoWipe || wipeInfoOnly) revert IllegalAction();
            totalStaked = 0;
            for (uint256 i = 0; i < survivor.totalSupply(); i++) {
                if (vault[i].isStaked == true) {
                    isUserStaking[vault[i].owner] = false;
                    balanceOfTokens[vault[i].owner] = 0;

                    survivor.transferFrom(address(this), vault[i].owner, i);
                    delete vault[i];
                }
            }
        }
    }

    function toggleWipeInfoOnly() external onlyOwner {
        wipeInfoOnlyActive = !wipeInfoOnlyActive;
    }

    function setStakedContract(MetroGradStaked _newContract)
        external
        onlyOwner
    {
        stakedSurvivor = _newContract;
    }

    function setContract(MetroGrad _newContract) external onlyOwner {
        survivor = _newContract;
    }

    function stake(uint256[] calldata tokenIds, address mintingWallet)
        external
    {
        uint256 tokenId;

        for (uint256 i = 0; i < tokenIds.length; i++) {
            tokenId = tokenIds[i];
            if (survivor.ownerOf(tokenId) != msg.sender) revert NotYourToken();

            survivor.transferFrom(msg.sender, address(this), tokenId);
            emit SurvivorStaked(msg.sender, mintingWallet, tokenId);

            vault[tokenId] = Stake({
                owner: msg.sender,
                tokenId: uint24(tokenId),
                isStaked: true
            });
        }
        stakedSurvivor.batchMint(msg.sender, tokenIds);
        isUserStaking[msg.sender] = true;
        setMintingWallet[msg.sender] = mintingWallet;
        totalStaked += tokenIds.length;
        balanceOfTokens[msg.sender] += tokenIds.length;
    }

    function getMintingWalletOf(address _account)
        external
        view
        returns (address)
    {
        if (isUserStaking[_account] == true) {
            return setMintingWallet[_account];
        } else {
            return address(0);
        }
    }

    function unstake(uint256[] calldata tokenIds) external {
        uint256 tokenId;

        for (uint256 i = 0; i < tokenIds.length; i++) {
            tokenId = tokenIds[i];
            if ((vault[tokenId].owner) != msg.sender) revert NotYourToken();

            emit SurvivorUnstaked(msg.sender, tokenId);
            delete vault[tokenId];
            survivor.transferFrom(address(this), msg.sender, tokenId);
        }
        stakedSurvivor.batchBurn(tokenIds);
        balanceOfTokens[msg.sender] -= tokenIds.length;

        if (balanceOfTokens[msg.sender] == 0) {
            isUserStaking[msg.sender] = false;
        }
        totalStaked -= tokenIds.length;
    }

    function setMintingWalletOfOwner(address newMintingWallet) external {
        if (isUserStaking[msg.sender] == true) {
            setMintingWallet[msg.sender] = newMintingWallet;
        }
    }

    function balanceOf(address account) public view returns (uint256) {
        return balanceOfTokens[account];
    }

    // should never be used inside of transaction because of gas fee
    function tokensOfOwner(address account)
        public
        view
        returns (uint256[] memory ownerTokens)
    {
        uint256 supply = survivor.totalSupply();
        uint256[] memory tmp = new uint256[](supply);

        uint256 index = 0;
        for (uint256 tokenId = 0; tokenId < supply; tokenId++) {
            if (vault[tokenId].owner == account) {
                tmp[index] = vault[tokenId].tokenId;
                index += 1;
            }
        }

        uint256[] memory tokens = new uint256[](index);
        for (uint256 i = 0; i < index; i++) {
            tokens[i] = tmp[i];
        }

        return tokens;
    }

    // should never be used inside of transaction because of gas fee
    function tokensOfOwnerUnstaked(address account)
        public
        view
        returns (uint256[] memory ownerTokens)
    {
        uint256 supply = survivor.totalSupply();
        uint256[] memory tmp = new uint256[](survivor.balanceOf(account));

        uint256 index = 0;
        for (uint256 tokenId = 0; tokenId < supply; tokenId++) {
            if (survivor.ownerOf(tokenId) == account) {
                tmp[index] = tokenId;
                index += 1;
            }
        }

        uint256[] memory tokens = new uint256[](index);
        for (uint256 i = 0; i < index; i++) {
            tokens[i] = tmp[i];
        }

        return tokens;
    }

    function isTokenIdStaked(uint256 tokenId) external view returns (bool) {
        return vault[tokenId].isStaked;
    }

    function onERC721Received(
        address,
        address from,
        uint256,
        bytes calldata
    ) external pure override returns (bytes4) {
        require(from == address(0x0), "Cannot send nfts to Vault directly");
        return IERC721Receiver.onERC721Received.selector;
    }
}

// SPDX-License-Identifier: MIT
// ERC721A Contracts v4.2.3
// Creator: Chiru Labs

pragma solidity ^0.8.4;

/**
 * @dev Interface of ERC721A.
 */
interface IERC721A {
    /**
     * The caller must own the token or be an approved operator.
     */
    error ApprovalCallerNotOwnerNorApproved();

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

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

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

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

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

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

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

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

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

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

    /**
     * The `quantity` minted with ERC2309 exceeds the safety limit.
     */
    error MintERC2309QuantityExceedsLimit();

    /**
     * The `extraData` cannot be set on an unintialized ownership slot.
     */
    error OwnershipNotInitializedForExtraData();

    // =============================================================
    //                            STRUCTS
    // =============================================================

    struct TokenOwnership {
        // The address of the owner.
        address addr;
        // Stores the start time of ownership with minimal overhead for tokenomics.
        uint64 startTimestamp;
        // Whether the token has been burned.
        bool burned;
        // Arbitrary data similar to `startTimestamp` that can be set via {_extraData}.
        uint24 extraData;
    }

    // =============================================================
    //                         TOKEN COUNTERS
    // =============================================================

    /**
     * @dev Returns the total number of tokens in existence.
     * Burned tokens will reduce the count.
     * To get the total number of tokens minted, please see {_totalMinted}.
     */
    function totalSupply() external view returns (uint256);

    // =============================================================
    //                            IERC165
    // =============================================================

    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);

    // =============================================================
    //                            IERC721
    // =============================================================

    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

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

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

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

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

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`,
     * checking first that contract recipients are aware of the ERC721 protocol
     * to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move
     * this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement
     * {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external payable;

    /**
     * @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external payable;

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom}
     * whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token
     * by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external payable;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the
     * zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external payable;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom}
     * for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    // =============================================================
    //                        IERC721Metadata
    // =============================================================

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

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

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

    // =============================================================
    //                           IERC2309
    // =============================================================

    /**
     * @dev Emitted when tokens in `fromTokenId` to `toTokenId`
     * (inclusive) is transferred from `from` to `to`, as defined in the
     * [ERC2309](https://eips.ethereum.org/EIPS/eip-2309) standard.
     *
     * See {_mintERC2309} for more details.
     */
    event ConsecutiveTransfer(uint256 indexed fromTokenId, uint256 toTokenId, address indexed from, address indexed to);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

/**
 * @dev These functions deal with verification of Merkle Tree proofs.
 *
 * The tree and the proofs can be generated using our
 * https://github.com/OpenZeppelin/merkle-tree[JavaScript library].
 * You will find a quickstart guide in the readme.
 *
 * 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.
 * OpenZeppelin's JavaScript library generates merkle trees that are safe
 * against this attack out of the box.
 */
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 simultaneously proven to be a part of a merkle tree defined by
     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
     *
     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * _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}
     *
     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * _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 sibling nodes in `proof`. The reconstruction
     * proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another
     * leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false
     * respectively.
     *
     * CAUTION: Not all merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree
     * is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the
     * tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer).
     *
     * _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}.
     *
     * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * _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) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/Math.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

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

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }
}

// SPDX-License-Identifier: MIT
// ERC721A Contracts v4.2.3
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import './IERC721A.sol';

/**
 * @dev Interface of ERC721 token receiver.
 */
interface ERC721A__IERC721Receiver {
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

/**
 * @title ERC721A
 *
 * @dev Implementation of the [ERC721](https://eips.ethereum.org/EIPS/eip-721)
 * Non-Fungible Token Standard, including the Metadata extension.
 * Optimized for lower gas during batch mints.
 *
 * Token IDs are minted in sequential order (e.g. 0, 1, 2, 3, ...)
 * starting from `_startTokenId()`.
 *
 * Assumptions:
 *
 * - An owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
 * - The maximum token ID cannot exceed 2**256 - 1 (max value of uint256).
 */
contract ERC721A is IERC721A {
    // Bypass for a `--via-ir` bug (https://github.com/chiru-labs/ERC721A/pull/364).
    struct TokenApprovalRef {
        address value;
    }

    // =============================================================
    //                           CONSTANTS
    // =============================================================

    // Mask of an entry in packed address data.
    uint256 private constant _BITMASK_ADDRESS_DATA_ENTRY = (1 << 64) - 1;

    // The bit position of `numberMinted` in packed address data.
    uint256 private constant _BITPOS_NUMBER_MINTED = 64;

    // The bit position of `numberBurned` in packed address data.
    uint256 private constant _BITPOS_NUMBER_BURNED = 128;

    // The bit position of `aux` in packed address data.
    uint256 private constant _BITPOS_AUX = 192;

    // Mask of all 256 bits in packed address data except the 64 bits for `aux`.
    uint256 private constant _BITMASK_AUX_COMPLEMENT = (1 << 192) - 1;

    // The bit position of `startTimestamp` in packed ownership.
    uint256 private constant _BITPOS_START_TIMESTAMP = 160;

    // The bit mask of the `burned` bit in packed ownership.
    uint256 private constant _BITMASK_BURNED = 1 << 224;

    // The bit position of the `nextInitialized` bit in packed ownership.
    uint256 private constant _BITPOS_NEXT_INITIALIZED = 225;

    // The bit mask of the `nextInitialized` bit in packed ownership.
    uint256 private constant _BITMASK_NEXT_INITIALIZED = 1 << 225;

    // The bit position of `extraData` in packed ownership.
    uint256 private constant _BITPOS_EXTRA_DATA = 232;

    // Mask of all 256 bits in a packed ownership except the 24 bits for `extraData`.
    uint256 private constant _BITMASK_EXTRA_DATA_COMPLEMENT = (1 << 232) - 1;

    // The mask of the lower 160 bits for addresses.
    uint256 private constant _BITMASK_ADDRESS = (1 << 160) - 1;

    // The maximum `quantity` that can be minted with {_mintERC2309}.
    // This limit is to prevent overflows on the address data entries.
    // For a limit of 5000, a total of 3.689e15 calls to {_mintERC2309}
    // is required to cause an overflow, which is unrealistic.
    uint256 private constant _MAX_MINT_ERC2309_QUANTITY_LIMIT = 5000;

    // The `Transfer` event signature is given by:
    // `keccak256(bytes("Transfer(address,address,uint256)"))`.
    bytes32 private constant _TRANSFER_EVENT_SIGNATURE =
        0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef;

    // =============================================================
    //                            STORAGE
    // =============================================================

    // The next token ID to be minted.
    uint256 private _currentIndex;

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

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to ownership details
    // An empty struct value does not necessarily mean the token is unowned.
    // See {_packedOwnershipOf} implementation for details.
    //
    // Bits Layout:
    // - [0..159]   `addr`
    // - [160..223] `startTimestamp`
    // - [224]      `burned`
    // - [225]      `nextInitialized`
    // - [232..255] `extraData`
    mapping(uint256 => uint256) private _packedOwnerships;

    // Mapping owner address to address data.
    //
    // Bits Layout:
    // - [0..63]    `balance`
    // - [64..127]  `numberMinted`
    // - [128..191] `numberBurned`
    // - [192..255] `aux`
    mapping(address => uint256) private _packedAddressData;

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

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

    // =============================================================
    //                          CONSTRUCTOR
    // =============================================================

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
        _currentIndex = _startTokenId();
    }

    // =============================================================
    //                   TOKEN COUNTING OPERATIONS
    // =============================================================

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

    /**
     * @dev Returns the next token ID to be minted.
     */
    function _nextTokenId() internal view virtual returns (uint256) {
        return _currentIndex;
    }

    /**
     * @dev Returns the total number of tokens in existence.
     * Burned tokens will reduce the count.
     * To get the total number of tokens minted, please see {_totalMinted}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        // Counter underflow is impossible as _burnCounter cannot be incremented
        // more than `_currentIndex - _startTokenId()` times.
        unchecked {
            return _currentIndex - _burnCounter - _startTokenId();
        }
    }

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

    /**
     * @dev Returns the total number of tokens burned.
     */
    function _totalBurned() internal view virtual returns (uint256) {
        return _burnCounter;
    }

    // =============================================================
    //                    ADDRESS DATA OPERATIONS
    // =============================================================

    /**
     * @dev Returns the number of tokens in `owner`'s account.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        if (owner == address(0)) revert BalanceQueryForZeroAddress();
        return _packedAddressData[owner] & _BITMASK_ADDRESS_DATA_ENTRY;
    }

    /**
     * Returns the number of tokens minted by `owner`.
     */
    function _numberMinted(address owner) internal view returns (uint256) {
        return (_packedAddressData[owner] >> _BITPOS_NUMBER_MINTED) & _BITMASK_ADDRESS_DATA_ENTRY;
    }

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

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

    /**
     * Sets the auxiliary data for `owner`. (e.g. number of whitelist mint slots used).
     * If there are multiple variables, please pack them into a uint64.
     */
    function _setAux(address owner, uint64 aux) internal virtual {
        uint256 packed = _packedAddressData[owner];
        uint256 auxCasted;
        // Cast `aux` with assembly to avoid redundant masking.
        assembly {
            auxCasted := aux
        }
        packed = (packed & _BITMASK_AUX_COMPLEMENT) | (auxCasted << _BITPOS_AUX);
        _packedAddressData[owner] = packed;
    }

    // =============================================================
    //                            IERC165
    // =============================================================

    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30000 gas.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        // The interface IDs are constants representing the first 4 bytes
        // of the XOR of all function selectors in the interface.
        // See: [ERC165](https://eips.ethereum.org/EIPS/eip-165)
        // (e.g. `bytes4(i.functionA.selector ^ i.functionB.selector ^ ...)`)
        return
            interfaceId == 0x01ffc9a7 || // ERC165 interface ID for ERC165.
            interfaceId == 0x80ac58cd || // ERC165 interface ID for ERC721.
            interfaceId == 0x5b5e139f; // ERC165 interface ID for ERC721Metadata.
    }

    // =============================================================
    //                        IERC721Metadata
    // =============================================================

    /**
     * @dev Returns the token collection name.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();

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

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

    // =============================================================
    //                     OWNERSHIPS OPERATIONS
    // =============================================================

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        return address(uint160(_packedOwnershipOf(tokenId)));
    }

    /**
     * @dev Gas spent here starts off proportional to the maximum mint batch size.
     * It gradually moves to O(1) as tokens get transferred around over time.
     */
    function _ownershipOf(uint256 tokenId) internal view virtual returns (TokenOwnership memory) {
        return _unpackedOwnership(_packedOwnershipOf(tokenId));
    }

    /**
     * @dev Returns the unpacked `TokenOwnership` struct at `index`.
     */
    function _ownershipAt(uint256 index) internal view virtual returns (TokenOwnership memory) {
        return _unpackedOwnership(_packedOwnerships[index]);
    }

    /**
     * @dev Initializes the ownership slot minted at `index` for efficiency purposes.
     */
    function _initializeOwnershipAt(uint256 index) internal virtual {
        if (_packedOwnerships[index] == 0) {
            _packedOwnerships[index] = _packedOwnershipOf(index);
        }
    }

    /**
     * Returns the packed ownership data of `tokenId`.
     */
    function _packedOwnershipOf(uint256 tokenId) private view returns (uint256) {
        uint256 curr = tokenId;

        unchecked {
            if (_startTokenId() <= curr)
                if (curr < _currentIndex) {
                    uint256 packed = _packedOwnerships[curr];
                    // If not burned.
                    if (packed & _BITMASK_BURNED == 0) {
                        // Invariant:
                        // There will always be an initialized ownership slot
                        // (i.e. `ownership.addr != address(0) && ownership.burned == false`)
                        // before an unintialized ownership slot
                        // (i.e. `ownership.addr == address(0) && ownership.burned == false`)
                        // Hence, `curr` will not underflow.
                        //
                        // We can directly compare the packed value.
                        // If the address is zero, packed will be zero.
                        while (packed == 0) {
                            packed = _packedOwnerships[--curr];
                        }
                        return packed;
                    }
                }
        }
        revert OwnerQueryForNonexistentToken();
    }

    /**
     * @dev Returns the unpacked `TokenOwnership` struct from `packed`.
     */
    function _unpackedOwnership(uint256 packed) private pure returns (TokenOwnership memory ownership) {
        ownership.addr = address(uint160(packed));
        ownership.startTimestamp = uint64(packed >> _BITPOS_START_TIMESTAMP);
        ownership.burned = packed & _BITMASK_BURNED != 0;
        ownership.extraData = uint24(packed >> _BITPOS_EXTRA_DATA);
    }

    /**
     * @dev Packs ownership data into a single uint256.
     */
    function _packOwnershipData(address owner, uint256 flags) private view returns (uint256 result) {
        assembly {
            // Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean.
            owner := and(owner, _BITMASK_ADDRESS)
            // `owner | (block.timestamp << _BITPOS_START_TIMESTAMP) | flags`.
            result := or(owner, or(shl(_BITPOS_START_TIMESTAMP, timestamp()), flags))
        }
    }

    /**
     * @dev Returns the `nextInitialized` flag set if `quantity` equals 1.
     */
    function _nextInitializedFlag(uint256 quantity) private pure returns (uint256 result) {
        // For branchless setting of the `nextInitialized` flag.
        assembly {
            // `(quantity == 1) << _BITPOS_NEXT_INITIALIZED`.
            result := shl(_BITPOS_NEXT_INITIALIZED, eq(quantity, 1))
        }
    }

    // =============================================================
    //                      APPROVAL OPERATIONS
    // =============================================================

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * 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) public payable virtual override {
        address owner = ownerOf(tokenId);

        if (_msgSenderERC721A() != owner)
            if (!isApprovedForAll(owner, _msgSenderERC721A())) {
                revert ApprovalCallerNotOwnerNorApproved();
            }

        _tokenApprovals[tokenId].value = to;
        emit Approval(owner, to, tokenId);
    }

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();

        return _tokenApprovals[tokenId].value;
    }

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom}
     * for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        _operatorApprovals[_msgSenderERC721A()][operator] = approved;
        emit ApprovalForAll(_msgSenderERC721A(), operator, approved);
    }

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted. See {_mint}.
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return
            _startTokenId() <= tokenId &&
            tokenId < _currentIndex && // If within bounds,
            _packedOwnerships[tokenId] & _BITMASK_BURNED == 0; // and not burned.
    }

    /**
     * @dev Returns whether `msgSender` is equal to `approvedAddress` or `owner`.
     */
    function _isSenderApprovedOrOwner(
        address approvedAddress,
        address owner,
        address msgSender
    ) private pure returns (bool result) {
        assembly {
            // Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean.
            owner := and(owner, _BITMASK_ADDRESS)
            // Mask `msgSender` to the lower 160 bits, in case the upper bits somehow aren't clean.
            msgSender := and(msgSender, _BITMASK_ADDRESS)
            // `msgSender == owner || msgSender == approvedAddress`.
            result := or(eq(msgSender, owner), eq(msgSender, approvedAddress))
        }
    }

    /**
     * @dev Returns the storage slot and value for the approved address of `tokenId`.
     */
    function _getApprovedSlotAndAddress(uint256 tokenId)
        private
        view
        returns (uint256 approvedAddressSlot, address approvedAddress)
    {
        TokenApprovalRef storage tokenApproval = _tokenApprovals[tokenId];
        // The following is equivalent to `approvedAddress = _tokenApprovals[tokenId].value`.
        assembly {
            approvedAddressSlot := tokenApproval.slot
            approvedAddress := sload(approvedAddressSlot)
        }
    }

    // =============================================================
    //                      TRANSFER OPERATIONS
    // =============================================================

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token
     * by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public payable virtual override {
        uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);

        if (address(uint160(prevOwnershipPacked)) != from) revert TransferFromIncorrectOwner();

        (uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId);

        // The nested ifs save around 20+ gas over a compound boolean condition.
        if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A()))
            if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved();

        if (to == address(0)) revert TransferToZeroAddress();

        _beforeTokenTransfers(from, to, tokenId, 1);

        // Clear approvals from the previous owner.
        assembly {
            if approvedAddress {
                // This is equivalent to `delete _tokenApprovals[tokenId]`.
                sstore(approvedAddressSlot, 0)
            }
        }

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

            // Updates:
            // - `address` to the next owner.
            // - `startTimestamp` to the timestamp of transfering.
            // - `burned` to `false`.
            // - `nextInitialized` to `true`.
            _packedOwnerships[tokenId] = _packOwnershipData(
                to,
                _BITMASK_NEXT_INITIALIZED | _nextExtraData(from, to, prevOwnershipPacked)
            );

            // If the next slot may not have been initialized (i.e. `nextInitialized == false`) .
            if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED == 0) {
                uint256 nextTokenId = tokenId + 1;
                // If the next slot's address is zero and not burned (i.e. packed value is zero).
                if (_packedOwnerships[nextTokenId] == 0) {
                    // If the next slot is within bounds.
                    if (nextTokenId != _currentIndex) {
                        // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.
                        _packedOwnerships[nextTokenId] = prevOwnershipPacked;
                    }
                }
            }
        }

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

    /**
     * @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public payable virtual override {
        safeTransferFrom(from, to, tokenId, '');
    }

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token
     * by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement
     * {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public payable virtual override {
        transferFrom(from, to, tokenId);
        if (to.code.length != 0)
            if (!_checkContractOnERC721Received(from, to, tokenId, _data)) {
                revert TransferToNonERC721ReceiverImplementer();
            }
    }

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

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

    /**
     * @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target contract.
     *
     * `from` - Previous owner of the given token ID.
     * `to` - Target address that will receive the token.
     * `tokenId` - Token ID to be transferred.
     * `_data` - Optional data to send along with the call.
     *
     * Returns whether the call correctly returned the expected magic value.
     */
    function _checkContractOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        try ERC721A__IERC721Receiver(to).onERC721Received(_msgSenderERC721A(), from, tokenId, _data) returns (
            bytes4 retval
        ) {
            return retval == ERC721A__IERC721Receiver(to).onERC721Received.selector;
        } catch (bytes memory reason) {
            if (reason.length == 0) {
                revert TransferToNonERC721ReceiverImplementer();
            } else {
                assembly {
                    revert(add(32, reason), mload(reason))
                }
            }
        }
    }

    // =============================================================
    //                        MINT OPERATIONS
    // =============================================================

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

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

        // Overflows are incredibly unrealistic.
        // `balance` and `numberMinted` have a maximum limit of 2**64.
        // `tokenId` has a maximum limit of 2**256.
        unchecked {
            // Updates:
            // - `balance += quantity`.
            // - `numberMinted += quantity`.
            //
            // We can directly add to the `balance` and `numberMinted`.
            _packedAddressData[to] += quantity * ((1 << _BITPOS_NUMBER_MINTED) | 1);

            // Updates:
            // - `address` to the owner.
            // - `startTimestamp` to the timestamp of minting.
            // - `burned` to `false`.
            // - `nextInitialized` to `quantity == 1`.
            _packedOwnerships[startTokenId] = _packOwnershipData(
                to,
                _nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0)
            );

            uint256 toMasked;
            uint256 end = startTokenId + quantity;

            // Use assembly to loop and emit the `Transfer` event for gas savings.
            // The duplicated `log4` removes an extra check and reduces stack juggling.
            // The assembly, together with the surrounding Solidity code, have been
            // delicately arranged to nudge the compiler into producing optimized opcodes.
            assembly {
                // Mask `to` to the lower 160 bits, in case the upper bits somehow aren't clean.
                toMasked := and(to, _BITMASK_ADDRESS)
                // Emit the `Transfer` event.
                log4(
                    0, // Start of data (0, since no data).
                    0, // End of data (0, since no data).
                    _TRANSFER_EVENT_SIGNATURE, // Signature.
                    0, // `address(0)`.
                    toMasked, // `to`.
                    startTokenId // `tokenId`.
                )

                // The `iszero(eq(,))` check ensures that large values of `quantity`
                // that overflows uint256 will make the loop run out of gas.
                // The compiler will optimize the `iszero` away for performance.
                for {
                    let tokenId := add(startTokenId, 1)
                } iszero(eq(tokenId, end)) {
                    tokenId := add(tokenId, 1)
                } {
                    // Emit the `Transfer` event. Similar to above.
                    log4(0, 0, _TRANSFER_EVENT_SIGNATURE, 0, toMasked, tokenId)
                }
            }
            if (toMasked == 0) revert MintToZeroAddress();

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

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
     *
     * This function is intended for efficient minting only during contract creation.
     *
     * It emits only one {ConsecutiveTransfer} as defined in
     * [ERC2309](https://eips.ethereum.org/EIPS/eip-2309),
     * instead of a sequence of {Transfer} event(s).
     *
     * Calling this function outside of contract creation WILL make your contract
     * non-compliant with the ERC721 standard.
     * For full ERC721 compliance, substituting ERC721 {Transfer} event(s) with the ERC2309
     * {ConsecutiveTransfer} event is only permissible during contract creation.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `quantity` must be greater than 0.
     *
     * Emits a {ConsecutiveTransfer} event.
     */
    function _mintERC2309(address to, uint256 quantity) internal virtual {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();
        if (quantity > _MAX_MINT_ERC2309_QUANTITY_LIMIT) revert MintERC2309QuantityExceedsLimit();

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

        // Overflows are unrealistic due to the above check for `quantity` to be below the limit.
        unchecked {
            // Updates:
            // - `balance += quantity`.
            // - `numberMinted += quantity`.
            //
            // We can directly add to the `balance` and `numberMinted`.
            _packedAddressData[to] += quantity * ((1 << _BITPOS_NUMBER_MINTED) | 1);

            // Updates:
            // - `address` to the owner.
            // - `startTimestamp` to the timestamp of minting.
            // - `burned` to `false`.
            // - `nextInitialized` to `quantity == 1`.
            _packedOwnerships[startTokenId] = _packOwnershipData(
                to,
                _nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0)
            );

            emit ConsecutiveTransfer(startTokenId, startTokenId + quantity - 1, address(0), to);

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

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

        unchecked {
            if (to.code.length != 0) {
                uint256 end = _currentIndex;
                uint256 index = end - quantity;
                do {
                    if (!_checkContractOnERC721Received(address(0), to, index++, _data)) {
                        revert TransferToNonERC721ReceiverImplementer();
                    }
                } while (index < end);
                // Reentrancy protection.
                if (_currentIndex != end) revert();
            }
        }
    }

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

    // =============================================================
    //                        BURN OPERATIONS
    // =============================================================

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

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

        address from = address(uint160(prevOwnershipPacked));

        (uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId);

        if (approvalCheck) {
            // The nested ifs save around 20+ gas over a compound boolean condition.
            if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A()))
                if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved();
        }

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

        // Clear approvals from the previous owner.
        assembly {
            if approvedAddress {
                // This is equivalent to `delete _tokenApprovals[tokenId]`.
                sstore(approvedAddressSlot, 0)
            }
        }

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as `tokenId` would have to be 2**256.
        unchecked {
            // Updates:
            // - `balance -= 1`.
            // - `numberBurned += 1`.
            //
            // We can directly decrement the balance, and increment the number burned.
            // This is equivalent to `packed -= 1; packed += 1 << _BITPOS_NUMBER_BURNED;`.
            _packedAddressData[from] += (1 << _BITPOS_NUMBER_BURNED) - 1;

            // Updates:
            // - `address` to the last owner.
            // - `startTimestamp` to the timestamp of burning.
            // - `burned` to `true`.
            // - `nextInitialized` to `true`.
            _packedOwnerships[tokenId] = _packOwnershipData(
                from,
                (_BITMASK_BURNED | _BITMASK_NEXT_INITIALIZED) | _nextExtraData(from, address(0), prevOwnershipPacked)
            );

            // If the next slot may not have been initialized (i.e. `nextInitialized == false`) .
            if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED == 0) {
                uint256 nextTokenId = tokenId + 1;
                // If the next slot's address is zero and not burned (i.e. packed value is zero).
                if (_packedOwnerships[nextTokenId] == 0) {
                    // If the next slot is within bounds.
                    if (nextTokenId != _currentIndex) {
                        // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.
                        _packedOwnerships[nextTokenId] = prevOwnershipPacked;
                    }
                }
            }
        }

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

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

    // =============================================================
    //                     EXTRA DATA OPERATIONS
    // =============================================================

    /**
     * @dev Directly sets the extra data for the ownership data `index`.
     */
    function _setExtraDataAt(uint256 index, uint24 extraData) internal virtual {
        uint256 packed = _packedOwnerships[index];
        if (packed == 0) revert OwnershipNotInitializedForExtraData();
        uint256 extraDataCasted;
        // Cast `extraData` with assembly to avoid redundant masking.
        assembly {
            extraDataCasted := extraData
        }
        packed = (packed & _BITMASK_EXTRA_DATA_COMPLEMENT) | (extraDataCasted << _BITPOS_EXTRA_DATA);
        _packedOwnerships[index] = packed;
    }

    /**
     * @dev Called during each token transfer to set the 24bit `extraData` field.
     * Intended to be overridden by the cosumer contract.
     *
     * `previousExtraData` - the value of `extraData` before transfer.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, `tokenId` will be burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _extraData(
        address from,
        address to,
        uint24 previousExtraData
    ) internal view virtual returns (uint24) {}

    /**
     * @dev Returns the next extra data for the packed ownership data.
     * The returned result is shifted into position.
     */
    function _nextExtraData(
        address from,
        address to,
        uint256 prevOwnershipPacked
    ) private view returns (uint256) {
        uint24 extraData = uint24(prevOwnershipPacked >> _BITPOS_EXTRA_DATA);
        return uint256(_extraData(from, to, extraData)) << _BITPOS_EXTRA_DATA;
    }

    // =============================================================
    //                       OTHER OPERATIONS
    // =============================================================

    /**
     * @dev Returns the message sender (defaults to `msg.sender`).
     *
     * If you are writing GSN compatible contracts, you need to override this function.
     */
    function _msgSenderERC721A() internal view virtual returns (address) {
        return msg.sender;
    }

    /**
     * @dev Converts a uint256 to its ASCII string decimal representation.
     */
    function _toString(uint256 value) internal pure virtual returns (string memory str) {
        assembly {
            // The maximum value of a uint256 contains 78 digits (1 byte per digit), but
            // we allocate 0xa0 bytes to keep the free memory pointer 32-byte word aligned.
            // We will need 1 word for the trailing zeros padding, 1 word for the length,
            // and 3 words for a maximum of 78 digits. Total: 5 * 0x20 = 0xa0.
            let m := add(mload(0x40), 0xa0)
            // Update the free memory pointer to allocate.
            mstore(0x40, m)
            // Assign the `str` to the end.
            str := sub(m, 0x20)
            // Zeroize the slot after the string.
            mstore(str, 0)

            // Cache the end of the memory to calculate the length later.
            let end := str

            // We write the string from rightmost digit to leftmost digit.
            // The following is essentially a do-while loop that also handles the zero case.
            // prettier-ignore
            for { let temp := value } 1 {} {
                str := sub(str, 1)
                // Write the character to the pointer.
                // The ASCII index of the '0' character is 48.
                mstore8(str, add(48, mod(temp, 10)))
                // Keep dividing `temp` until zero.
                temp := div(temp, 10)
                // prettier-ignore
                if iszero(temp) { break }
            }

            let length := sub(end, str)
            // Move the pointer 32 bytes leftwards to make room for the length.
            str := sub(str, 0x20)
            // Store the length.
            mstore(str, length)
        }
    }
}

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

pragma solidity ^0.8.0;

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

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

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

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

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

abstract contract OperatorFilterer {
    error OperatorNotAllowed(address operator);

    IOperatorFilterRegistry constant operatorFilterRegistry =
        IOperatorFilterRegistry(0x000000000000AAeB6D7670E522A718067333cd4E);

    constructor(address subscriptionOrRegistrantToCopy, bool subscribe) {
        // If an inheriting token contract is deployed to a network without the registry deployed, the modifier
        // will not revert, but the contract will need to be registered with the registry once it is deployed in
        // order for the modifier to filter addresses.
        if (address(operatorFilterRegistry).code.length > 0) {
            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)
                        && operatorFilterRegistry.isOperatorAllowed(address(this), from)
                )
            ) {
                revert OperatorNotAllowed(msg.sender);
            }
        }
        _;
    }
}

//SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

import "@openzeppelin/contracts/access/Ownable.sol";
import "./ERC721A.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "./IERC721A.sol";

contract MetroGrad is ERC721A, Ownable, ReentrancyGuard {
    using Strings for uint256;
    using SafeMath for uint256;

    error MaxSupplyExceeded();
    error NotAllowlisted();
    error MaxPerWalletExceeded();
    error InsufficientValue();
    error PreSaleNotActive();
    error PublicSaleNotActive();
    error CannotIncreaseCost();
    error NoContracts();

    uint256 public presaleCost = 0.0 ether;
    uint256 public publicCost = 0.0 ether;
    uint256 private reserveLimit = 0;

    uint16 public maxSupply = 333;

    uint8 public maxMintAmount = 2;

    string private _baseTokenURI =
        "ipfs://QmTzANCLC54prBsNEg4SiPWM1xW8eVrFTXoRtrHwcrkzum/";

    bool public presaleActive;
    bool public publicSaleActive;

    mapping(address => bool) private _allowList;

    constructor() ERC721A("MetroGrad Gen.1", "Survivor") {
    }

    modifier callerIsUser() {
        if (msg.sender != tx.origin) revert NoContracts();
        _;
    }

    function isAllowlisted(address _user) external view returns (bool) {
        return _allowList[_user];
    }

    function setPreSaleCost(uint256 _newPreSaleCost) external onlyOwner {
        if (_newPreSaleCost > 0.05 ether) revert CannotIncreaseCost();
        presaleCost = _newPreSaleCost;
    }

    function setPublicSaleCost(uint256 _newPublicCost) external onlyOwner {
        if (_newPublicCost > 0.05 ether) revert CannotIncreaseCost();
        publicCost = _newPublicCost;
    }

    function togglePreSalePhase() external onlyOwner {
        if (presaleCost == 0.025 ether) {
            presaleCost = 0.05 ether;
        } else {
            presaleCost = 0.025 ether;
        }
    }

    function presaleMint(uint8 _amount) external payable callerIsUser {
        if (!presaleActive) revert PreSaleNotActive();
        if (totalSupply() + _amount > maxSupply) revert MaxSupplyExceeded();
        if (!_allowList[msg.sender]) revert NotAllowlisted();
        if (_numberMinted(msg.sender) + _amount > maxMintAmount)
            revert MaxPerWalletExceeded();
        if (msg.value != presaleCost * _amount) revert InsufficientValue();

        _mint(msg.sender, _amount);
    }

    function mint(uint8 _amount) external payable callerIsUser {
        if (!publicSaleActive) revert PublicSaleNotActive();
        if (totalSupply() + _amount > maxSupply) revert MaxSupplyExceeded();

        if (_numberMinted(msg.sender) + _amount > maxMintAmount)
            revert MaxPerWalletExceeded();

        if (msg.value != publicCost * _amount) revert InsufficientValue();

        _mint(msg.sender, _amount);
    }

    function airDrop(address[] memory targets) external onlyOwner {
        if (targets.length + reserveLimit > 25) revert MaxSupplyExceeded();

        reserveLimit += targets.length;

        for (uint256 i = 0; i < targets.length; i++) {
            _mint(targets[i], 1);
        }
    }

    function setMaxMintAmount(uint8 _maxMintAmount) external onlyOwner {
        maxMintAmount = _maxMintAmount;
    }

    function _baseURI() internal view virtual override returns (string memory) {
        return _baseTokenURI;
    }

    function setBaseURI(string calldata baseURI) external onlyOwner {
        _baseTokenURI = baseURI;
    }

    function togglePublicSale() external onlyOwner {
        publicSaleActive = !publicSaleActive;
    }

    function togglePresale() external onlyOwner {
        presaleActive = !presaleActive;
    }

    function setAllowlistAddresses(address[] calldata _users)
        external
        onlyOwner
    {
        for (uint256 i = 0; i < _users.length; i++) {
            _allowList[_users[i]] = true;
        }
    }

    function withdraw() external onlyOwner nonReentrant {
        uint256 balance = address(this).balance;
        uint256 payoutDev = balance.mul(5).div(100);
        uint256 payoutSelHelp = balance.mul(4).div(100);
        payable(0xEAa13156a5D2651832164EcC8302C40fD2C401A1).transfer(payoutDev);
        payable(0xd346F04605cf0c65CDcc6368ABf82Bc1B646d381).transfer(
            payoutSelHelp
        );
        balance = address(this).balance;
        payable(msg.sender).transfer(balance);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/ERC721.sol)

pragma solidity ^0.8.0;

import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";

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

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

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

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

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

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

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

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        require(owner != address(0), "ERC721: address zero is not a valid owner");
        return _balances[owner];
    }

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

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

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

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

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

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

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual override {
        address owner = ERC721.ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not token owner or approved for all"
        );

        _approve(to, tokenId);
    }

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

        return _tokenApprovals[tokenId];
    }

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

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

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved");

        _transfer(from, to, tokenId);
    }

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

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory data
    ) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved");
        _safeTransfer(from, to, tokenId, data);
    }

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

    /**
     * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist
     */
    function _ownerOf(uint256 tokenId) internal view virtual returns (address) {
        return _owners[tokenId];
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     * and stop existing when they are burned (`_burn`).
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return _ownerOf(tokenId) != address(0);
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        address owner = ERC721.ownerOf(tokenId);
        return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
    }

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

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

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

        _beforeTokenTransfer(address(0), to, tokenId, 1);

        // Check that tokenId was not minted by `_beforeTokenTransfer` hook
        require(!_exists(tokenId), "ERC721: token already minted");

        unchecked {
            // Will not overflow unless all 2**256 token ids are minted to the same owner.
            // Given that tokens are minted one by one, it is impossible in practice that
            // this ever happens. Might change if we allow batch minting.
            // The ERC fails to describe this case.
            _balances[to] += 1;
        }

        _owners[tokenId] = to;

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

        _afterTokenTransfer(address(0), to, tokenId, 1);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     * This is an internal function that does not check if the sender is authorized to operate on the token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId, 1);

        // Update ownership in case tokenId was transferred by `_beforeTokenTransfer` hook
        owner = ERC721.ownerOf(tokenId);

        // Clear approvals
        delete _tokenApprovals[tokenId];

        unchecked {
            // Cannot overflow, as that would require more tokens to be burned/transferred
            // out than the owner initially received through minting and transferring in.
            _balances[owner] -= 1;
        }
        delete _owners[tokenId];

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

        _afterTokenTransfer(owner, address(0), tokenId, 1);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId, 1);

        // Check that tokenId was not transferred by `_beforeTokenTransfer` hook
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");

        // Clear approvals from the previous owner
        delete _tokenApprovals[tokenId];

        unchecked {
            // `_balances[from]` cannot overflow for the same reason as described in `_burn`:
            // `from`'s balance is the number of token held, which is at least one before the current
            // transfer.
            // `_balances[to]` could overflow in the conditions described in `_mint`. That would require
            // all 2**256 token ids to be minted, which in practice is impossible.
            _balances[from] -= 1;
            _balances[to] += 1;
        }
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);

        _afterTokenTransfer(from, to, tokenId, 1);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits an {Approval} event.
     */
    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
    }

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

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

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory data
    ) private returns (bool) {
        if (to.isContract()) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {
                return retval == IERC721Receiver.onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    /// @solidity memory-safe-assembly
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting and burning. If {ERC721Consecutive} is
     * used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s tokens will be transferred to `to`.
     * - When `from` is zero, the tokens will be minted for `to`.
     * - When `to` is zero, ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     * - `batchSize` is non-zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256, /* firstTokenId */
        uint256 batchSize
    ) internal virtual {
        if (batchSize > 1) {
            if (from != address(0)) {
                _balances[from] -= batchSize;
            }
            if (to != address(0)) {
                _balances[to] += batchSize;
            }
        }
    }

    /**
     * @dev Hook that is called after any token transfer. This includes minting and burning. If {ERC721Consecutive} is
     * used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s tokens were transferred to `to`.
     * - When `from` is zero, the tokens were minted for `to`.
     * - When `to` is zero, ``from``'s tokens were burned.
     * - `from` and `to` are never both zero.
     * - `batchSize` is non-zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 firstTokenId,
        uint256 batchSize
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator,
        Rounding rounding
    ) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10**64) {
                value /= 10**64;
                result += 64;
            }
            if (value >= 10**32) {
                value /= 10**32;
                result += 32;
            }
            if (value >= 10**16) {
                value /= 10**16;
                result += 16;
            }
            if (value >= 10**8) {
                value /= 10**8;
                result += 8;
            }
            if (value >= 10**4) {
                value /= 10**4;
                result += 4;
            }
            if (value >= 10**2) {
                value /= 10**2;
                result += 2;
            }
            if (value >= 10**1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
        }
    }
}

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

pragma solidity ^0.8.0;

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

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

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

interface IOperatorFilterRegistry {
    function isOperatorAllowed(address registrant, address operator) external view returns (bool);
    function register(address registrant) external;
    function registerAndSubscribe(address registrant, address subscription) external;
    function registerAndCopyEntries(address registrant, address registrantToCopy) external;
    function 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 v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "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");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or 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 {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // 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 v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (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: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * 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 (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);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ApprovalCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"ApprovalQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"BalanceQueryForZeroAddress","type":"error"},{"inputs":[],"name":"FinalPhaseInactive","type":"error"},{"inputs":[],"name":"InsufficientValue","type":"error"},{"inputs":[],"name":"InvalidOperation","type":"error"},{"inputs":[],"name":"MaxPerWalletExceeded","type":"error"},{"inputs":[],"name":"MaxSupplyExceeded","type":"error"},{"inputs":[],"name":"MintERC2309QuantityExceedsLimit","type":"error"},{"inputs":[],"name":"MintToZeroAddress","type":"error"},{"inputs":[],"name":"MintZeroQuantity","type":"error"},{"inputs":[],"name":"NoContracts","type":"error"},{"inputs":[],"name":"NotAllowedToClaim","type":"error"},{"inputs":[],"name":"NotAllowlisted","type":"error"},{"inputs":[],"name":"NothingToClaim","type":"error"},{"inputs":[{"internalType":"address","name":"operator","type":"address"}],"name":"OperatorNotAllowed","type":"error"},{"inputs":[],"name":"OwnerQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"OwnershipNotInitializedForExtraData","type":"error"},{"inputs":[],"name":"PreSaleNotActive","type":"error"},{"inputs":[],"name":"PublicSaleNotActive","type":"error"},{"inputs":[],"name":"TransferCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"TransferFromIncorrectOwner","type":"error"},{"inputs":[],"name":"TransferToNonERC721ReceiverImplementer","type":"error"},{"inputs":[],"name":"TransferToZeroAddress","type":"error"},{"inputs":[],"name":"URIQueryForNonexistentToken","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"fromTokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"toTokenId","type":"uint256"},{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"ConsecutiveTransfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address[]","name":"targets","type":"address[]"}],"name":"airDrop","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"claimAllRemainingFree","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"emergencyWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"finalPhase","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"freeClaim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_user","type":"address"}],"name":"isAllowlisted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_id","type":"uint256"}],"name":"isIdClaimed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_user","type":"address"},{"internalType":"bytes32[]","name":"_proof","type":"bytes32[]"}],"name":"isValid","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxMintAmount","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxSupply","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxSupplyForPresale","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint8","name":"_amount","type":"uint8"}],"name":"mint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"presaleActive","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"presaleCost","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint8","name":"_amount","type":"uint8"},{"internalType":"bytes32[]","name":"_proof","type":"bytes32[]"}],"name":"presaleMint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"publicCost","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"publicSaleActive","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"reserved","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"reservedCounter","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address[]","name":"_users","type":"address[]"}],"name":"setAllowlistAddresses","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"baseURI","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint8","name":"_maxMintAmount","type":"uint8"}],"name":"setMaxMintAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_maxSupplyForPresale","type":"uint256"}],"name":"setMaxSupplyForPresale","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract MetroGradStaked","name":"_stakedMetro","type":"address"}],"name":"setMetroGradStaked","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract MetroVault","name":"_staked","type":"address"}],"name":"setMetroVault","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_newPreSaleCost","type":"uint256"}],"name":"setPreSaleCost","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_presaleMerkleRoot","type":"bytes32"}],"name":"setPresaleMerkleRoot","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_newPublicCost","type":"uint256"}],"name":"setPublicSaleCost","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_reserved","type":"uint256"}],"name":"setReserveAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"_tokensToClaim","type":"uint256[]"}],"name":"stakerClaim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"toggleFinalPhase","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"togglePresale","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"togglePublicSale","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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