//SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/utils/cryptography/MerkleProof.sol


// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

/**
 * @dev These functions deal with verification of Merkle Trees proofs.
 *
 * The proofs can be generated using the JavaScript library
 * https://github.com/miguelmota/merkletreejs[merkletreejs].
 * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
 *
 * See `test/utils/cryptography/MerkleProof.test.js` for some examples.
 */
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 Returns the rebuilt hash obtained by traversing a Merklee 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++) {
            bytes32 proofElement = proof[i];
            if (computedHash <= proofElement) {
                // Hash(current computed hash + current element of the proof)
                computedHash = _efficientHash(computedHash, proofElement);
            } else {
                // Hash(current element of the proof + current computed hash)
                computedHash = _efficientHash(proofElement, computedHash);
            }
        }
        return computedHash;
    }

    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

// File: @openzeppelin/contracts/utils/Strings.sol


// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

// File: @openzeppelin/contracts/utils/Context.sol


// 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;
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol


// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;


/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        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);
    }
}

// File: @openzeppelin/contracts/utils/Address.sol


// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol


// OpenZeppelin Contracts v4.4.1 (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 `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// File: @openzeppelin/contracts/utils/introspection/IERC165.sol


// 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);
}

// File: @openzeppelin/contracts/utils/introspection/ERC165.sol


// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;


/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// File: @openzeppelin/contracts/token/ERC721/IERC721.sol


// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;


/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, 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
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @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 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);

    /**
     * @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;
}

// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol


// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;


/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

// File: erc721a/contracts/ERC721A.sol


// Creator: Chiru Labs

pragma solidity ^0.8.4;








error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintToZeroAddress();
error MintZeroQuantity();
error OwnerQueryForNonexistentToken();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error URIQueryForNonexistentToken();

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension. Built to optimize for lower gas during batch mints.
 *
 * Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..).
 *
 * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
 *
 * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).
 */
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata {
    using Address for address;
    using Strings for uint256;

    // Compiler will pack this into a single 256bit word.
    struct TokenOwnership {
        // The address of the owner.
        address addr;
        // Keeps track of the start time of ownership with minimal overhead for tokenomics.
        uint64 startTimestamp;
        // Whether the token has been burned.
        bool burned;
    }

    // Compiler will pack this into a single 256bit word.
    struct AddressData {
        // Realistically, 2**64-1 is more than enough.
        uint64 balance;
        // Keeps track of mint count with minimal overhead for tokenomics.
        uint64 numberMinted;
        // Keeps track of burn count with minimal overhead for tokenomics.
        uint64 numberBurned;
        // For miscellaneous variable(s) pertaining to the address
        // (e.g. number of whitelist mint slots used).
        // If there are multiple variables, please pack them into a uint64.
        uint64 aux;
    }

    // The tokenId of the next token to be minted.
    uint256 internal _currentIndex;

    // The number of tokens burned.
    uint256 internal _burnCounter;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to ownership details
    // An empty struct value does not necessarily mean the token is unowned. See _ownershipOf implementation for details.
    mapping(uint256 => TokenOwnership) internal _ownerships;

    // Mapping owner address to address data
    mapping(address => AddressData) private _addressData;

    // Mapping from token ID to approved address
    mapping(uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
        _currentIndex = _startTokenId();
    }

    /**
     * To change the starting tokenId, please override this function.
     */
    function _startTokenId() internal view virtual returns (uint256) {
        return 0;
    }

    /**
     * @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
     */
    function totalSupply() public view returns (uint256) {
        // Counter underflow is impossible as _burnCounter cannot be incremented
        // more than _currentIndex - _startTokenId() times
        unchecked {
            return _currentIndex - _burnCounter - _startTokenId();
        }
    }

    /**
     * Returns the total amount of tokens minted in the contract.
     */
    function _totalMinted() internal view returns (uint256) {
        // Counter underflow is impossible as _currentIndex does not decrement,
        // and it is initialized to _startTokenId()
        unchecked {
            return _currentIndex - _startTokenId();
        }
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view override returns (uint256) {
        if (owner == address(0)) revert BalanceQueryForZeroAddress();
        return uint256(_addressData[owner].balance);
    }

    /**
     * Returns the number of tokens minted by `owner`.
     */
    function _numberMinted(address owner) internal view returns (uint256) {
        return uint256(_addressData[owner].numberMinted);
    }

    /**
     * Returns the number of tokens burned by or on behalf of `owner`.
     */
    function _numberBurned(address owner) internal view returns (uint256) {
        return uint256(_addressData[owner].numberBurned);
    }

    /**
     * Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
     */
    function _getAux(address owner) internal view returns (uint64) {
        return _addressData[owner].aux;
    }

    /**
     * Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
     * If there are multiple variables, please pack them into a uint64.
     */
    function _setAux(address owner, uint64 aux) internal {
        _addressData[owner].aux = aux;
    }

    /**
     * Gas spent here starts off proportional to the maximum mint batch size.
     * It gradually moves to O(1) as tokens get transferred around in the collection over time.
     */
    function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
        uint256 curr = tokenId;

        unchecked {
            if (_startTokenId() <= curr && curr < _currentIndex) {
                TokenOwnership memory ownership = _ownerships[curr];
                if (!ownership.burned) {
                    if (ownership.addr != address(0)) {
                        return ownership;
                    }
                    // Invariant:
                    // There will always be an ownership that has an address and is not burned
                    // before an ownership that does not have an address and is not burned.
                    // Hence, curr will not underflow.
                    while (true) {
                        curr--;
                        ownership = _ownerships[curr];
                        if (ownership.addr != address(0)) {
                            return ownership;
                        }
                    }
                }
            }
        }
        revert OwnerQueryForNonexistentToken();
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view override returns (address) {
        return _ownershipOf(tokenId).addr;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        if (!_exists(tokenId)) revert URIQueryForNonexistentToken();

        string memory baseURI = _baseURI();
        return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : '';
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overriden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return '';
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public override {
        address owner = ERC721A.ownerOf(tokenId);
        if (to == owner) revert ApprovalToCurrentOwner();

        if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) {
            revert ApprovalCallerNotOwnerNorApproved();
        }

        _approve(to, tokenId, owner);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view override returns (address) {
        if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        if (operator == _msgSender()) revert ApproveToCaller();

        _operatorApprovals[_msgSender()][operator] = approved;
        emit ApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        safeTransferFrom(from, to, tokenId, '');
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public virtual override {
        _transfer(from, to, tokenId);
        if (to.isContract() && !_checkContractOnERC721Received(from, to, tokenId, _data)) {
            revert TransferToNonERC721ReceiverImplementer();
        }
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     */
    function _exists(uint256 tokenId) internal view returns (bool) {
        return _startTokenId() <= tokenId && tokenId < _currentIndex && !_ownerships[tokenId].burned;
    }

    function _safeMint(address to, uint256 quantity) internal {
        _safeMint(to, quantity, '');
    }

    /**
     * @dev Safely mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(
        address to,
        uint256 quantity,
        bytes memory _data
    ) internal {
        _mint(to, quantity, _data, true);
    }

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `quantity` must be greater than 0.
     *
     * Emits a {Transfer} event.
     */
    function _mint(
        address to,
        uint256 quantity,
        bytes memory _data,
        bool safe
    ) internal {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();

        _beforeTokenTransfers(address(0), to, startTokenId, quantity);

        // Overflows are incredibly unrealistic.
        // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
        // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
        unchecked {
            _addressData[to].balance += uint64(quantity);
            _addressData[to].numberMinted += uint64(quantity);

            _ownerships[startTokenId].addr = to;
            _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);

            uint256 updatedIndex = startTokenId;
            uint256 end = updatedIndex + quantity;

            if (safe && to.isContract()) {
                do {
                    emit Transfer(address(0), to, updatedIndex);
                    if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) {
                        revert TransferToNonERC721ReceiverImplementer();
                    }
                } while (updatedIndex != end);
                // Reentrancy protection
                if (_currentIndex != startTokenId) revert();
            } else {
                do {
                    emit Transfer(address(0), to, updatedIndex++);
                } while (updatedIndex != end);
            }
            _currentIndex = updatedIndex;
        }
        _afterTokenTransfers(address(0), to, startTokenId, quantity);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) private {
        TokenOwnership memory prevOwnership = _ownershipOf(tokenId);

        if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();

        bool isApprovedOrOwner = (_msgSender() == from ||
            isApprovedForAll(from, _msgSender()) ||
            getApproved(tokenId) == _msgSender());

        if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        if (to == address(0)) revert TransferToZeroAddress();

        _beforeTokenTransfers(from, to, tokenId, 1);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId, from);

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
        unchecked {
            _addressData[from].balance -= 1;
            _addressData[to].balance += 1;

            TokenOwnership storage currSlot = _ownerships[tokenId];
            currSlot.addr = to;
            currSlot.startTimestamp = uint64(block.timestamp);

            // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
            uint256 nextTokenId = tokenId + 1;
            TokenOwnership storage nextSlot = _ownerships[nextTokenId];
            if (nextSlot.addr == address(0)) {
                // This will suffice for checking _exists(nextTokenId),
                // as a burned slot cannot contain the zero address.
                if (nextTokenId != _currentIndex) {
                    nextSlot.addr = from;
                    nextSlot.startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

        emit Transfer(from, to, tokenId);
        _afterTokenTransfers(from, to, tokenId, 1);
    }

    /**
     * @dev This is equivalent to _burn(tokenId, false)
     */
    function _burn(uint256 tokenId) internal virtual {
        _burn(tokenId, false);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId, bool approvalCheck) internal virtual {
        TokenOwnership memory prevOwnership = _ownershipOf(tokenId);

        address from = prevOwnership.addr;

        if (approvalCheck) {
            bool isApprovedOrOwner = (_msgSender() == from ||
                isApprovedForAll(from, _msgSender()) ||
                getApproved(tokenId) == _msgSender());

            if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
        }

        _beforeTokenTransfers(from, address(0), tokenId, 1);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId, from);

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
        unchecked {
            AddressData storage addressData = _addressData[from];
            addressData.balance -= 1;
            addressData.numberBurned += 1;

            // Keep track of who burned the token, and the timestamp of burning.
            TokenOwnership storage currSlot = _ownerships[tokenId];
            currSlot.addr = from;
            currSlot.startTimestamp = uint64(block.timestamp);
            currSlot.burned = true;

            // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
            // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
            uint256 nextTokenId = tokenId + 1;
            TokenOwnership storage nextSlot = _ownerships[nextTokenId];
            if (nextSlot.addr == address(0)) {
                // This will suffice for checking _exists(nextTokenId),
                // as a burned slot cannot contain the zero address.
                if (nextTokenId != _currentIndex) {
                    nextSlot.addr = from;
                    nextSlot.startTimestamp = prevOwnership.startTimestamp;
                }
            }
        }

        emit Transfer(from, address(0), tokenId);
        _afterTokenTransfers(from, address(0), tokenId, 1);

        // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
        unchecked {
            _burnCounter++;
        }
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(
        address to,
        uint256 tokenId,
        address owner
    ) private {
        _tokenApprovals[tokenId] = to;
        emit Approval(owner, to, tokenId);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkContractOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
            return retval == IERC721Receiver(to).onERC721Received.selector;
        } catch (bytes memory reason) {
            if (reason.length == 0) {
                revert TransferToNonERC721ReceiverImplementer();
            } else {
                assembly {
                    revert(add(32, reason), mload(reason))
                }
            }
        }
    }

    /**
     * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
     * And also called before burning one token.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, `tokenId` will be burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _beforeTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}

    /**
     * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
     * minting.
     * And also called after one token has been burned.
     *
     * startTokenId - the first token id to be transferred
     * quantity - the amount to be transferred
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
     * transferred to `to`.
     * - When `from` is zero, `tokenId` has been minted for `to`.
     * - When `to` is zero, `tokenId` has been burned by `from`.
     * - `from` and `to` are never both zero.
     */
    function _afterTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual {}
}

// File: contracts/CyberRonin Haruka.sol






/*
HarukaRonin.sol

Updated Contract by @NftDoyler
Original Security Audit by @CryptoSec_Group
*/

contract HarukaRonin is Ownable, ERC721A {
    bytes32 public merkleRoot;

    // Note: This should be marked constant if you NEVER plan on changing them to save gas.
        // That said, leaving the option open in case you wanted to increase mints/decrease collection size.
    // Note AGAIN: That said, setting this to a constant saves the SLOADs and about 1.8% gas per mint.
    uint256 public MAX_SUPPLY = 5555;
    
    // Updated: This was never modified, so is now a constant
    uint256 constant public MAX_SUPPLY_PRIVATE_WHITELISTED = 55;

    // Same with this, these should be constant if you never plan on changing them.
    uint256 public mintRatePublicWhitelist = 0.055 ether;
    uint256 public mintRatePublicSale = 0.069 ether;

    // Updated: "Private" WL logic has been removed as it was unnecessary
        // There is now a method for the dev team to mint their 55 
    //bool public privateWhitelisted = true;
    //uint256 public mintRatePrivateWhitelist = 0 ether;

        // Also lets the public see exactly how many they've minted.
    uint256 public DEV_MINTS;

    // Note: For even MORE gas efficiency you can actually pack bools into one bit instead of 8.
        // That said, it's unnecessary complexity at a time like this, but a fun experiment for the reader!
    // Updated: I've set paused to be true to start, so that the team has time to make annoucements etc.
        // (See publicSale/publicWhitelisted logic for more information)
    bool public paused = true;
    bool public revealed = false;
    
    // Updated: With the new on/off switch logic, these need to be set to different values by default.
        // This means that, once the contract is deployed, WL will be available immediately (if not paused).
    // Updated AGAIN: Yould think that with the new on/off logic that this isn't necessary.
        // That said, due to the usage and comparisons, it SAVES a miniscule amount of gas.
    bool public publicWhitelisted = true;
    bool public publicSale = false;

    uint256 public mintedPublicWhitelistAddressLimit = 2;
    uint256 public mintedPublicAddressLimit = 3;    

    string public baseURI = "ipfs://QmfEjT2YeRcE3pzL8HovHPX1kCsNPFgWSiRytHfj38kpUt/";

    // Updated: Setting the default value here instead of the constructor.
        // I'd personally make this a constant since it shouldn't have to change, but leaving for v1 compatability.
    string public hiddenMetadataUri = "ipfs://QmfEjT2YeRcE3pzL8HovHPX1kCsNPFgWSiRytHfj38kpUt/Hidden.json";
    
    string constant public uriSuffix = ".json";

    // Updated: This is a new string that the owners can use for CONTRACT_URI
        // This is how you can easily set Collection name/description/image,
        // as well as royalty fees and wallet address.
    string public CONTRACT_URI = "ipfs://QmXLBLk2CqPEFP2KRS1VoTtnoxkM3BbT8yoBwfK7twW4ne";

    // Note: If this was never going to be changed it could have also been a constant.
        // That said, not sure if the v2 updates mess with this or not.
    address public privateWLAddress = 0x016100D875E932c7B6f9416f151e562e04Faf779;

    // Updated AGAIN: By disabling this and ONLY tracking one mapping we save about 11.8% gas per WL mint.
    //mapping(address => uint256) public publicWhitelistAddressMintedBalance;

        // That said, it's the quickest and easiest way to handle the previous v1 logic
    
    // Note: If you wanted to save even MORE gas, you could disable this mapping entirely and only use balanceOf(msg.sender)
        // This saves you about 19.5% per publicMint at the cost of not letting users buy on secondary and THEN mint
        // Basically you save out on one SLOAD and SSTORE PER MINT!
    mapping(address => uint256) public numUserMints;

    // Updated: Hard-coded developer address for use in the withdraw functionality
        //Note: This wallet does not get any of the secondary fees/deposits, just mints
    address constant public doylerAddress = 0xeD19c8970c7BE64f5AC3f4beBFDDFd571861c3b7;

    // Community Wallet - this gets 55% of the withdrawals
    address public communityWallet = 0xE2836891C9B57821b9Fba1B7Ccc110E9DDaBCf85;

    // Team Wallet - this gets 15% (technically a little less counting gas fees) of the withdrawals
    address public teamWallet = 0x016100D875E932c7B6f9416f151e562e04Faf779;

    uint256 private doylerPayable;

    // Updated: This was the primary cause of most of the original gas issues.
        // Left it in for the bit of history.
    //address[] public mintedPublicWhitelistAddresses;

    // Updated: I removed the initial hidden metadata URI from here as it was not necessary
        // Also, the constructor no longer sets the Merkle Root to separate out those functions
        // This does require a second call to the contract, but prevents a failure in that call from preventing deployment.
    constructor() ERC721A("CyberRonin Haruka", "Haruka") { }

    /*
     *

    $$$$$$$\            $$\                      $$\                     $$$$$$$$\                              $$\     $$\                               
    $$  __$$\           \__|                     $$ |                    $$  _____|                             $$ |    \__|                              
    $$ |  $$ | $$$$$$\  $$\ $$\    $$\ $$$$$$\ $$$$$$\    $$$$$$\        $$ |   $$\   $$\ $$$$$$$\   $$$$$$$\ $$$$$$\   $$\  $$$$$$\  $$$$$$$\   $$$$$$$\ 
    $$$$$$$  |$$  __$$\ $$ |\$$\  $$  |\____$$\\_$$  _|  $$  __$$\       $$$$$\ $$ |  $$ |$$  __$$\ $$  _____|\_$$  _|  $$ |$$  __$$\ $$  __$$\ $$  _____|
    $$  ____/ $$ |  \__|$$ | \$$\$$  / $$$$$$$ | $$ |    $$$$$$$$ |      $$  __|$$ |  $$ |$$ |  $$ |$$ /        $$ |    $$ |$$ /  $$ |$$ |  $$ |\$$$$$$\  
    $$ |      $$ |      $$ |  \$$$  / $$  __$$ | $$ |$$\ $$   ____|      $$ |   $$ |  $$ |$$ |  $$ |$$ |        $$ |$$\ $$ |$$ |  $$ |$$ |  $$ | \____$$\ 
    $$ |      $$ |      $$ |   \$  /  \$$$$$$$ | \$$$$  |\$$$$$$$\       $$ |   \$$$$$$  |$$ |  $$ |\$$$$$$$\   \$$$$  |$$ |\$$$$$$  |$$ |  $$ |$$$$$$$  |
    \__|      \__|      \__|    \_/    \_______|  \____/  \_______|      \__|    \______/ \__|  \__| \_______|   \____/ \__| \______/ \__|  \__|\_______/ 
                                                                                                                                                      
    *
    */

    // This function is if you want to override the first Token ID# for ERC721A
       // In this case, HR is starting at #1 instead of #0
    // Note: Fun fact - by overloading this method you save a small amount of gas for minting (technically just the first mint)
    function _startTokenId() internal view virtual override returns (uint256) {
        return 1;
    }

    // Updated: Internal verifyPublicWL method.
        // This is the one that is actually losed for contract logic and uses msg.sender
    function _verifyPublicWL(bytes32[] memory _proof) internal view returns (bool) {
        return MerkleProof.verify(_proof, merkleRoot, keccak256(abi.encodePacked(msg.sender)));
    }

    // Updated: This didn't exist in v1 of the contract, but is a best practice to protect users    
    function refundOverpay(uint256 price) private {
        if (msg.value > price) {
            (bool succ, ) = payable(msg.sender).call{
                value: (msg.value - price)
            }("");
            require(succ, "Transfer failed");
        }
    }

    /*
     *

    $$$$$$$\            $$\       $$\ $$\                 $$$$$$$$\                              $$\     $$\                               
    $$  __$$\           $$ |      $$ |\__|                $$  _____|                             $$ |    \__|                              
    $$ |  $$ |$$\   $$\ $$$$$$$\  $$ |$$\  $$$$$$$\       $$ |   $$\   $$\ $$$$$$$\   $$$$$$$\ $$$$$$\   $$\  $$$$$$\  $$$$$$$\   $$$$$$$\ 
    $$$$$$$  |$$ |  $$ |$$  __$$\ $$ |$$ |$$  _____|      $$$$$\ $$ |  $$ |$$  __$$\ $$  _____|\_$$  _|  $$ |$$  __$$\ $$  __$$\ $$  _____|
    $$  ____/ $$ |  $$ |$$ |  $$ |$$ |$$ |$$ /            $$  __|$$ |  $$ |$$ |  $$ |$$ /        $$ |    $$ |$$ /  $$ |$$ |  $$ |\$$$$$$\  
    $$ |      $$ |  $$ |$$ |  $$ |$$ |$$ |$$ |            $$ |   $$ |  $$ |$$ |  $$ |$$ |        $$ |$$\ $$ |$$ |  $$ |$$ |  $$ | \____$$\ 
    $$ |      \$$$$$$  |$$$$$$$  |$$ |$$ |\$$$$$$$\       $$ |   \$$$$$$  |$$ |  $$ |\$$$$$$$\   \$$$$  |$$ |\$$$$$$  |$$ |  $$ |$$$$$$$  |
    \__|       \______/ \_______/ \__|\__| \_______|      \__|    \______/ \__|  \__| \_______|   \____/ \__| \______/ \__|  \__|\_______/ 

    *
    */

    // Note: Generally speaking you COULD save some gas making functions 'external' instead of 'public'
        // That said, you can no longer call them from other contracts OR internally.
        // Also, these gas savings are usually just when dealing with large arrays, which we've removed.

    // Updated: No reason devs shouldn't be allowed to mint during public or WL windows
    // Updated: Removed other unnecessary require statements
    function privateMint(uint256 quantity) public payable mintCompliance(quantity) {
        // Updated: Just shorter reason strings, it's a small savings, but why not?
        require(msg.sender == privateWLAddress, "Dev minting only");
        // Note: You could technically save like 0.004% in gas by replacing every <= with < etc.
            // That said, it isn't worth the confusion when looking at the code
        require(DEV_MINTS + quantity <= MAX_SUPPLY_PRIVATE_WHITELISTED, "No dev mints left");

        // Note: This is SLIGHTLY more efficient than including the dev mints into the universal mapping
        DEV_MINTS += quantity;

        _safeMint(msg.sender, quantity);
    }
    
    // Updated AGAIN: Using a local require() instead of a modifier saved a touch of gas
    function publicWhitelistMint(uint256 quantity, bytes32[] memory proof) external payable mintCompliance(quantity) {
        // Updated AGAIN: Setting this variable locally saves 2 SLOAD calls and about 0.2% gas
        uint256 price = mintRatePublicWhitelist;
        // Updated AGAIN: By using this as a local variable we save 1 SLOAD call and about 0.1% gas
        uint256 currMints = numUserMints[msg.sender];

        require(publicWhitelisted, "WL sale inactive");
        
        // Updated AGAIN: See notes in variable section above as to the reasoning behind this removal.
        //require(publicWhitelistAddressMintedBalance[msg.sender] + quantity <= mintedPublicWhitelistAddressLimit, "User max WL mint limit");
        
        // Updated AGAIN: By using this as a local variable we save 1 SLOAD call and about 0.1% gas
        //require(numUserMints[msg.sender] + quantity <= mintedPublicWhitelistAddressLimit, "User max WL mint limit");
        require(currMints + quantity <= mintedPublicWhitelistAddressLimit, "User max WL mint limit");
        
        // Note: Here is the example if you wanted to just use balanceOf
        //require(balanceOf(msg.sender) + quantity <= mintedPublicWhitelistAddressLimit, "User max WL mint limit");
        
        require(msg.value >= (price * quantity), "Not enough ETH sent");
        require(_verifyPublicWL(proof), "User not on WL");
        
        //publicWhitelistAddressMintedBalance[msg.sender] += quantity;
        
        //numUserMints[msg.sender] += quantity;
        numUserMints[msg.sender] = (currMints + quantity);

        _safeMint(msg.sender, quantity);

        doylerPayable += ((price * quantity) * 30) / 100;
        
            // That said, it only adds about 0.13% gas to each transaction to protect users who messed up.
        refundOverpay(price * quantity);
    }

    // Updated: Removed a lot of unnecessary require statements
    // Updated: Implemented more efficient tracking of user mints
    function publicMint(uint256 quantity) external payable mintCompliance(quantity) {
        // Updated AGAIN: Setting this variable locally saves 2 SLOAD calls and about 0.2% gas
        uint256 price = mintRatePublicSale;
        // Updated AGAIN: By using this as a local variable we save 1 SLOAD call and about 0.1% gas
        uint256 currMints = numUserMints[msg.sender];
        
        require(publicSale, "Public sale inactive");
        require(currMints + quantity <= mintedPublicAddressLimit, "User max mint limit");
        
        // Note: Here is the example if you wanted to just use balanceOf
        //require(balanceOf(msg.sender) + quantity <= mintedPublicAddressLimit, "User max mint limit");
        
        require(msg.value >= (price * quantity), "Not enough ETH sent");

        // Note: This line + the require add an additional 22% gas to this method
            // That said, was the most convenient way to track 2 limits at the same time.
        //numUserMints[msg.sender] += quantity;
        numUserMints[msg.sender] = (currMints + quantity);

        // Updated AGAIN: By using this as a local variable we save 1 SLOAD call and about 0.1% gas
        //require(numUserMints[msg.sender] + quantity <= mintedPublicAddressLimit, "User max mint limit");

        _safeMint(msg.sender, quantity);


        // Note: Having both of these in the mint methods is not the most efficient
            // That said, it worked for the time constraints
        doylerPayable += ((price * quantity) * 30) / 100;
        
        // Note: This method didn't exist in the last version of the contract.
            // That said, it only adds about 0.13% gas to each transaction to protect users who messed up.
        refundOverpay(price * quantity);
    }

    /*
     *

    $$\    $$\ $$\                               $$$$$$$$\                              $$\     $$\                               
    $$ |   $$ |\__|                              $$  _____|                             $$ |    \__|                              
    $$ |   $$ |$$\  $$$$$$\  $$\  $$\  $$\       $$ |   $$\   $$\ $$$$$$$\   $$$$$$$\ $$$$$$\   $$\  $$$$$$\  $$$$$$$\   $$$$$$$\ 
    \$$\  $$  |$$ |$$  __$$\ $$ | $$ | $$ |      $$$$$\ $$ |  $$ |$$  __$$\ $$  _____|\_$$  _|  $$ |$$  __$$\ $$  __$$\ $$  _____|
     \$$\$$  / $$ |$$$$$$$$ |$$ | $$ | $$ |      $$  __|$$ |  $$ |$$ |  $$ |$$ /        $$ |    $$ |$$ /  $$ |$$ |  $$ |\$$$$$$\  
      \$$$  /  $$ |$$   ____|$$ | $$ | $$ |      $$ |   $$ |  $$ |$$ |  $$ |$$ |        $$ |$$\ $$ |$$ |  $$ |$$ |  $$ | \____$$\ 
       \$  /   $$ |\$$$$$$$\ \$$$$$\$$$$  |      $$ |   \$$$$$$  |$$ |  $$ |\$$$$$$$\   \$$$$  |$$ |\$$$$$$  |$$ |  $$ |$$$$$$$  |
        \_/    \__| \_______| \_____\____/       \__|    \______/ \__|  \__| \_______|   \____/ \__| \______/ \__|  \__|\_______/ 

    *
    */

    // Note: walletOfOwner is only really necessary for enumerability when staking/using on websites etc.
        // That said, it's again a public view so we can keep it in.
        // This could also be optimized if someone REALLY wanted, but it's just a public view.
        // Check the pinned tweets of 0xInuarashi for more ideas on this method!
        // For now, this is just the version that existed in v1.
    function walletOfOwner(address _owner) public view returns (uint256[] memory)
    {
        uint256 ownerTokenCount = balanceOf(_owner);
        uint256[] memory ownedTokenIds = new uint256[](ownerTokenCount);
        uint256 currentTokenId = 1;
        uint256 ownedTokenIndex = 0;

        while (ownedTokenIndex < ownerTokenCount && currentTokenId <= MAX_SUPPLY) {
            address currentTokenOwner = ownerOf(currentTokenId);

            if (currentTokenOwner == _owner) {
                ownedTokenIds[ownedTokenIndex] = currentTokenId;

                ownedTokenIndex++;
            }

        currentTokenId++;
        }

        return ownedTokenIds;
    }

    // Updated: There was no reason this needed to be virtual unless something plans on inheriting HR.
    function tokenURI(uint256 _tokenId) public view override returns (string memory) {
        // Note: You don't REALLY need this require statement since nothing should be querying for non-existing tokens after reveal.
            // That said, it's a public view method so gas efficiency shouldn't come into play.
        require(_exists(_tokenId), "ERC721Metadata: URI query for nonexistent token");
        
        // Updated: The old contract had unnecessary logic and conditionals about a _baseURI that was set by default.
        if (revealed) {
            return string(abi.encodePacked(baseURI, Strings.toString(_tokenId), uriSuffix));
        }
        else {
            return hiddenMetadataUri;
        }
    }

    // https://docs.opensea.io/docs/contract-level-metadata
    function contractURI() public view returns (string memory) {
        return CONTRACT_URI;
    }

    // Updated: Public verification functionality
        // This may not be necessary, but can be a nice to have.
    function verifyPublicWL(address _address, bytes32[] memory _proof) public view returns (bool) {
        return MerkleProof.verify(_proof, keccak256(abi.encodePacked(_address)), merkleRoot);
    }

    /*
     *

     $$$$$$\                                                    $$$$$$$$\                              $$\     $$\                               
    $$  __$$\                                                   $$  _____|                             $$ |    \__|                              
    $$ /  $$ |$$\  $$\  $$\ $$$$$$$\   $$$$$$\   $$$$$$\        $$ |   $$\   $$\ $$$$$$$\   $$$$$$$\ $$$$$$\   $$\  $$$$$$\  $$$$$$$\   $$$$$$$\ 
    $$ |  $$ |$$ | $$ | $$ |$$  __$$\ $$  __$$\ $$  __$$\       $$$$$\ $$ |  $$ |$$  __$$\ $$  _____|\_$$  _|  $$ |$$  __$$\ $$  __$$\ $$  _____|
    $$ |  $$ |$$ | $$ | $$ |$$ |  $$ |$$$$$$$$ |$$ |  \__|      $$  __|$$ |  $$ |$$ |  $$ |$$ /        $$ |    $$ |$$ /  $$ |$$ |  $$ |\$$$$$$\  
    $$ |  $$ |$$ | $$ | $$ |$$ |  $$ |$$   ____|$$ |            $$ |   $$ |  $$ |$$ |  $$ |$$ |        $$ |$$\ $$ |$$ |  $$ |$$ |  $$ | \____$$\ 
     $$$$$$  |\$$$$$\$$$$  |$$ |  $$ |\$$$$$$$\ $$ |            $$ |   \$$$$$$  |$$ |  $$ |\$$$$$$$\   \$$$$  |$$ |\$$$$$$  |$$ |  $$ |$$$$$$$  |
     \______/  \_____\____/ \__|  \__| \_______|\__|            \__|    \______/ \__|  \__| \_______|   \____/ \__| \______/ \__|  \__|\_______/ 

     *
     */

    // Note: Again, these aren't REALLY necessary if the mint numbers aren't going to change.
    // That said, leaving for posterity/compatability.
    function setPublicWhitelistedAddressLimit(uint256 _limit) public onlyOwner {
        mintedPublicWhitelistAddressLimit = _limit;
    }
    function setPublicAddressLimit(uint256 _limit) public onlyOwner {
        mintedPublicAddressLimit = _limit;
    }

    function setBaseURI(string memory _baseUri) public onlyOwner {
        baseURI = _baseUri;
    }

    // Note: I don't see this needing to change, especially at this point.
        // But, again, leaving for posterity/compatability.
    function setHiddenMetadataUri(string memory _hiddenMetadataUri) public onlyOwner {
        hiddenMetadataUri = _hiddenMetadataUri;
    }

    // Updated: This is a new method that the developers can call if they don't want to make separate calls
        // Should save a touch of gas plus handles reveal/URI in one swoop.
    function revealCollection(bool _revealed, string memory _baseUri) public onlyOwner {
        revealed = _revealed;
        baseURI = _baseUri;
    }

    // https://docs.opensea.io/docs/contract-level-metadata
    function setContractURI(string memory _contractURI) public onlyOwner {
        CONTRACT_URI = _contractURI;
    }

    // Note: Another option is to inherit Pausable without implementing the logic yourself.
        // This is fine for now and I'm keeping it for compatability with v1
        // https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/security/Pausable.sol
    function setPaused(bool _state) public onlyOwner {
        paused = _state;
    }

    function setRevealed(bool _state) public onlyOwner {
        revealed = _state;
    }

    // Updated: The publicSale/publicWhitelisted variables now function as an on/off switch.
        // If publicSale is enabled, then WL cannot mint and vice-versa
        // Dev minting can now happen 
    function setPublicSale(bool _state) public onlyOwner {
        publicSale = _state;
        publicWhitelisted = !_state;
    }
    function setPublicWhitelisted(bool _state) public onlyOwner {
        publicWhitelisted = _state;
        publicSale = !_state;
    }

    // Updated: Added a setter for the privateWLAddress variable in case the devs wanted to change it.
        // This was hard-coded in the previous version.
    function setPrivateWLAddress(address _privateWLAddress) public onlyOwner {
        privateWLAddress = _privateWLAddress;
    }

    // Updated: This functionality was ONLY handled by the constructor in the previous version.
        // This did not allow for WL additions/removals
    function setPublicMerkleRoot(bytes32 _merkleRoot) external onlyOwner {
        merkleRoot = _merkleRoot;
    }

    // Updated: Added a setter for the communityWallet variable in case the devs wanted to change it.
    function setCommunityWalletAddress(address _communityWalletAddress) public onlyOwner {
        communityWallet = _communityWalletAddress;
    }

    // Updated: Added a setter for the teamWallet variable in case the devs wanted to change it.
    function setTeamWalletAddress(address _teamWalletAddress) public onlyOwner {
        teamWallet = _teamWalletAddress;
    }

    // Updated: Added functionality for withdrawal payments as well
    // Note: The inspiration for this withdrawal method came from MD's work on Kiwami.
        // Be sure to check out their contract for the OG - https://etherscan.io/address/0x701a038af4bd0fc9b69a829ddcb2f61185a49568#code
        // Thanks to @_MouseDev for the big brain ideas.
    function withdraw() external payable onlyOwner {
        // Get the current funds to calculate community percentage
        uint256 currBalance = address(this).balance;

        // Note: This is the withdrawal to the doylerAddress - MINT FEES ONLY
        (bool succ, ) = payable(doylerAddress).call{
            value: doylerPayable
        }("");
        require(succ, "Doyler transfer failed");

        // Note: There is TECHNICALLY a re-entrancy issue if doylerAddress was a contract by doing this after the transfer
            // That said, it's clearly NOT a contract and that account cannot call withdraw()
            // Just making sure I get paid before it's 0ed out!
        doylerPayable = 0;

        // Withdraw 55% of the ENTIRE balance to the community wallet.
        // Note: If developers add any extra funds or people over pay, this will also get withdrawn here.
        (succ, ) = payable(communityWallet).call{
            value: (currBalance * 55) / 100
        }("");
        require(succ, "Community transfer failed");

        // Withdraw the ENTIRE remaining balance to the team wallet.
        (succ, ) = payable(teamWallet).call{
            value: address(this).balance
        }("");
        require(succ, "Team transfer failed");
    }

    // Updated: Added owner-only mint functionality to "Airdrop" the old NFTs to the original owners
        // There are cooler and more efficient ways 
    function mintToOwner(uint256 quantity, address receiver) public onlyOwner mintCompliance(quantity) {
        _safeMint(receiver, quantity);
    }

    /*
     *

    $$\      $$\                 $$\ $$\  $$$$$$\  $$\                               
    $$$\    $$$ |                $$ |\__|$$  __$$\ \__|                              
    $$$$\  $$$$ | $$$$$$\   $$$$$$$ |$$\ $$ /  \__|$$\  $$$$$$\   $$$$$$\   $$$$$$$\ 
    $$\$$\$$ $$ |$$  __$$\ $$  __$$ |$$ |$$$$\     $$ |$$  __$$\ $$  __$$\ $$  _____|
    $$ \$$$  $$ |$$ /  $$ |$$ /  $$ |$$ |$$  _|    $$ |$$$$$$$$ |$$ |  \__|\$$$$$$\  
    $$ |\$  /$$ |$$ |  $$ |$$ |  $$ |$$ |$$ |      $$ |$$   ____|$$ |       \____$$\ 
    $$ | \_/ $$ |\$$$$$$  |\$$$$$$$ |$$ |$$ |      $$ |\$$$$$$$\ $$ |      $$$$$$$  |
    \__|     \__| \______/  \_______|\__|\__|      \__| \_______|\__|      \_______/ 

    *
    */

    // Note: Something this simple doesn't HAVE to be a modifier, but it saves a little duplication
    // Updated: Removed the unnecessary isValidateEvent logic
    // Updated: Removed other unnecessary require statements
    modifier mintCompliance(uint256 quantity) {
        require(!paused, "Contract is paused");
        require(totalSupply() + quantity <= MAX_SUPPLY, "Not enough mints left");
        // Note: This wasn't in the original contract, and adding it only costs like 21 gas/mint
        require(tx.origin == msg.sender, "No contract minting");
        _;
    }
}