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// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

import { AccessControlInternal } from "@solidstate/contracts/access/access_control/AccessControlInternal.sol";
import { LibGenAiNftFactoryStorage } from "../libraries/LibGenAiNftFactoryStorage.sol";
import { IGenAiNftFactory } from "../interfaces/IGenAiNftFactory.sol";
import { TokenFiGenAiNft } from "../TokenFiGenAiNft.sol";
import { EnumerableSet } from "@solidstate/contracts/data/EnumerableSet.sol";
import { Create2Deployer } from "../libraries/Create2Deployer.sol";

/**
 * @title GenAiNftFactoryFacet
 * @dev Factory facet for deploying TokenFiGenAiNft instances
 */
contract GenAiNftFactoryFacet is IGenAiNftFactory, AccessControlInternal {
    using EnumerableSet for EnumerableSet.AddressSet;

    /**
     * @dev Internal helper to get bytecode for TokenFiGenAiNft deployment
     */
    function _getNftBytecode(
        string memory name_,
        string memory symbol_,
        string memory baseURI_,
        uint256 maxSupply_,
        address adminAddress_
    ) private view returns (bytes memory) {
        return abi.encodePacked(type(TokenFiGenAiNft).creationCode, abi.encode(name_, symbol_, baseURI_, maxSupply_, adminAddress_, address(this)));
    }

    /**
     * @dev Internal function to deploy a new TokenFiGenAiNft instance
     * @param name_ The name of the NFT collection
     * @param symbol_ The symbol of the NFT collection
     * @param baseURI_ The base URI for token metadata
     * @param maxSupply_ Maximum supply (0 for unlimited)
     * @param adminAddress_ The admin address for the deployed NFT contract
     * @param deployer_ The address of the deployer (msg.sender)
     * @return The address of the newly deployed NFT contract
     */
    function _deployNftInternal(
        string memory name_,
        string memory symbol_,
        string memory baseURI_,
        uint256 maxSupply_,
        address adminAddress_,
        address deployer_
    ) internal returns (address) {
        require(adminAddress_ != address(0), "Invalid admin address");
        require(bytes(name_).length > 0, "Name cannot be empty");
        require(bytes(symbol_).length > 0, "Symbol cannot be empty");

        LibGenAiNftFactoryStorage.DiamondStorage storage ds = LibGenAiNftFactoryStorage.diamondStorage();

        // Get and increment the nonce for this deployer to prevent salt collisions
        uint256 nonce = ds.deployerNonces[deployer_];
        ds.deployerNonces[deployer_] = nonce + 1;

        // Deploy using CREATE2 for deterministic address
        // Salt is computed from deployer address and nonce to allow multiple deployments per user
        address nftAddress = Create2Deployer.deploy(_getNftBytecode(name_, symbol_, baseURI_, maxSupply_, adminAddress_), deployer_, nonce);

        // Verify the contract was deployed successfully
        require(nftAddress != address(0), "Deployment failed");

        // Store the deployed NFT address
        ds.deployedNfts.add(nftAddress);
        ds.nftsByDeployer[deployer_].add(nftAddress);

        emit NftDeployed(ds.nftDeployedLastBlock, nftAddress, name_, symbol_, baseURI_, maxSupply_, adminAddress_, deployer_);
        ds.nftDeployedLastBlock = block.number;

        return nftAddress;
    }

    /**
     * @dev Deploy a new TokenFiGenAiNft instance
     * @param name_ The name of the NFT collection
     * @param symbol_ The symbol of the NFT collection
     * @param baseURI_ The base URI for token metadata
     * @param maxSupply_ Maximum supply (0 for unlimited)
     * @param adminAddress_ The admin address for the deployed NFT contract
     * @return The address of the newly deployed NFT contract
     */
    function deployNft(
        string memory name_,
        string memory symbol_,
        string memory baseURI_,
        uint256 maxSupply_,
        address adminAddress_
    ) external override returns (address) {
        return _deployNftInternal(name_, symbol_, baseURI_, maxSupply_, adminAddress_, msg.sender);
    }

    /**
     * @dev Deploy a new TokenFiGenAiNft instance with msg.sender as admin
     * @param name_ The name of the NFT collection
     * @param symbol_ The symbol of the NFT collection
     * @param baseURI_ The base URI for token metadata
     * @param maxSupply_ Maximum supply (0 for unlimited)
     * @return The address of the newly deployed NFT contract
     */
    function deployNftWithSenderAsAdmin(
        string memory name_,
        string memory symbol_,
        string memory baseURI_,
        uint256 maxSupply_
    ) external override returns (address) {
        return _deployNftInternal(name_, symbol_, baseURI_, maxSupply_, msg.sender, msg.sender);
    }

    /**
     * @dev Batch deploy multiple NFT contracts
     * @param names_ Array of names for the NFT collections
     * @param symbols_ Array of symbols for the NFT collections
     * @param baseURIs_ Array of base URIs for token metadata
     * @param maxSupplies_ Array of maximum supplies (0 for unlimited)
     * @param adminAddresses_ Array of admin addresses for the deployed NFT contracts
     * @return An array of addresses of the newly deployed NFT contracts
     */
    function batchDeployNft(
        string[] memory names_,
        string[] memory symbols_,
        string[] memory baseURIs_,
        uint256[] memory maxSupplies_,
        address[] memory adminAddresses_
    ) external override returns (address[] memory) {
        require(names_.length > 0, "Empty arrays");
        require(
            names_.length == symbols_.length &&
                names_.length == baseURIs_.length &&
                names_.length == maxSupplies_.length &&
                names_.length == adminAddresses_.length,
            "Array length mismatch"
        );

        address[] memory deployedNfts = new address[](names_.length);

        for (uint256 i = 0; i < names_.length; i++) {
            deployedNfts[i] = _deployNftInternal(names_[i], symbols_[i], baseURIs_[i], maxSupplies_[i], adminAddresses_[i], msg.sender);
        }

        return deployedNfts;
    }

    /**
     * @dev Get deployed NFT contracts with pagination
     * @param offset The starting index
     * @param limit The maximum number of items to return (0 for all remaining)
     * @return A PaginatedNfts struct containing NFT addresses and pagination details
     */
    function getDeployedNfts(uint256 offset, uint256 limit) external view override returns (IGenAiNftFactory.PaginatedNfts memory) {
        LibGenAiNftFactoryStorage.DiamondStorage storage ds = LibGenAiNftFactoryStorage.diamondStorage();
        uint256 totalLength = ds.deployedNfts.length();
        // Return empty result if offset is out of bounds
        if (offset >= totalLength && totalLength > 0) {
            return
                IGenAiNftFactory.PaginatedNfts({
                    nfts: new address[](0),
                    totalCount: totalLength,
                    currentPage: 0,
                    totalPages: limit > 0 ? (totalLength + limit - 1) / limit : 1,
                    offset: offset,
                    limit: limit
                });
        }

        // Calculate the actual number of items to return
        uint256 remaining = totalLength > offset ? totalLength - offset : 0;
        uint256 count = (limit == 0 || limit > remaining) ? remaining : limit;

        // Create result array and populate it
        address[] memory result = new address[](count);
        for (uint256 i = 0; i < count; i++) {
            result[i] = ds.deployedNfts.at(offset + i);
        }

        // Calculate pagination details
        uint256 currentPage = limit > 0 ? (offset / limit) + 1 : 1;
        uint256 totalPages = limit > 0 ? (totalLength + limit - 1) / limit : 1;

        return
            IGenAiNftFactory.PaginatedNfts({
                nfts: result,
                totalCount: totalLength,
                currentPage: currentPage,
                totalPages: totalPages,
                offset: offset,
                limit: limit
            });
    }

    /**
     * @dev Get the number of deployed NFT contracts
     * @return The count of deployed NFT contracts
     */
    function getDeployedNftsCount() external view override returns (uint256) {
        LibGenAiNftFactoryStorage.DiamondStorage storage ds = LibGenAiNftFactoryStorage.diamondStorage();
        return ds.deployedNfts.length();
    }

    /**
     * @dev Get a deployed NFT contract by index
     * @param index The index of the deployed NFT contract
     * @return The address of the deployed NFT contract
     */
    function getDeployedNftByIndex(uint256 index) external view override returns (address) {
        LibGenAiNftFactoryStorage.DiamondStorage storage ds = LibGenAiNftFactoryStorage.diamondStorage();
        require(index < ds.deployedNfts.length(), "Index out of bounds");
        return ds.deployedNfts.at(index);
    }

    /**
     * @dev Get all NFTs deployed by a specific user
     * @param deployer The address of the deployer
     * @return An array of addresses of NFTs deployed by the user
     */
    function getNftsByDeployer(address deployer) external view override returns (address[] memory) {
        LibGenAiNftFactoryStorage.DiamondStorage storage ds = LibGenAiNftFactoryStorage.diamondStorage();
        uint256 length = ds.nftsByDeployer[deployer].length();
        address[] memory result = new address[](length);
        for (uint256 i = 0; i < length; i++) {
            result[i] = ds.nftsByDeployer[deployer].at(i);
        }
        return result;
    }

    /**
     * @dev Get the number of NFTs deployed by a specific user
     * @param deployer The address of the deployer
     * @return The count of NFTs deployed by the user
     */
    function getNftsCountByDeployer(address deployer) external view override returns (uint256) {
        LibGenAiNftFactoryStorage.DiamondStorage storage ds = LibGenAiNftFactoryStorage.diamondStorage();
        return ds.nftsByDeployer[deployer].length();
    }

    /**
     * @dev Get the last block numbers for various operations
     * @return A LastBlockInfo struct containing the last block numbers
     */
    function getLastBlockInfo() external view override returns (IGenAiNftFactory.LastBlockInfo memory) {
        LibGenAiNftFactoryStorage.DiamondStorage storage ds = LibGenAiNftFactoryStorage.diamondStorage();
        return IGenAiNftFactory.LastBlockInfo({ nftDeployedLastBlock: ds.nftDeployedLastBlock, nftMintedLastBlock: ds.nftMintedLastBlock });
    }

    /**
     * @dev Predict the address where an NFT will be deployed using CREATE2
     * @param name_ The name of the NFT collection
     * @param symbol_ The symbol of the NFT collection
     * @param baseURI_ The base URI for token metadata
     * @param maxSupply_ Maximum supply (0 for unlimited)
     * @param adminAddress_ The admin address for the deployed NFT contract
     * @param deployer_ The address of the deployer
     * @return The predicted address where the NFT will be deployed
     */
    function predictNftAddress(
        string memory name_,
        string memory symbol_,
        string memory baseURI_,
        uint256 maxSupply_,
        address adminAddress_,
        address deployer_
    ) external view override returns (address) {
        LibGenAiNftFactoryStorage.DiamondStorage storage ds = LibGenAiNftFactoryStorage.diamondStorage();
        // Get the current nonce for this deployer (will be used for the next deployment)
        uint256 nonce = ds.deployerNonces[deployer_];
        // Get the bytecode and compute CREATE2 address
        // Salt is computed from deployer address and nonce to allow multiple deployments per user
        bytes memory bytecode = _getNftBytecode(name_, symbol_, baseURI_, maxSupply_, adminAddress_);
        return Create2Deployer.computeAddress(address(this), deployer_, nonce, keccak256(bytecode));
    }

    /**
     * @dev Predict the address where an NFT will be deployed using CREATE2 with a specific nonce
     * @param name_ The name of the NFT collection
     * @param symbol_ The symbol of the NFT collection
     * @param baseURI_ The base URI for token metadata
     * @param maxSupply_ Maximum supply (0 for unlimited)
     * @param adminAddress_ The admin address for the deployed NFT contract
     * @param deployer_ The address of the deployer
     * @param nonce_ The nonce to use for the prediction
     * @return The predicted address where the NFT will be deployed
     */
    function predictNftAddressWithNonce(
        string memory name_,
        string memory symbol_,
        string memory baseURI_,
        uint256 maxSupply_,
        address adminAddress_,
        address deployer_,
        uint256 nonce_
    ) external view override returns (address) {
        // Get the bytecode and compute CREATE2 address with the specified nonce
        bytes memory bytecode = _getNftBytecode(name_, symbol_, baseURI_, maxSupply_, adminAddress_);
        return Create2Deployer.computeAddress(address(this), deployer_, nonce_, keccak256(bytecode));
    }

    /**
     * @dev Called by deployed NFT contracts to emit mint events on the diamond
     * @param to The address receiving the NFT
     * @param tokenId The token ID that was minted
     * @param tokenURI The token URI (empty string if using base URI)
     */
    function emitNftMintEvent(address to, uint256 tokenId, string memory tokenURI) external override {
        address nftAddress = msg.sender;
        LibGenAiNftFactoryStorage.DiamondStorage storage ds = LibGenAiNftFactoryStorage.diamondStorage();
        // Verify that the caller is a deployed NFT contract
        require(ds.deployedNfts.contains(nftAddress), "Invalid NFT address");

        emit NftMinted(ds.nftMintedLastBlock, nftAddress, to, tokenId, tokenURI);
        ds.nftMintedLastBlock = block.number;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/AccessControl.sol)

pragma solidity ^0.8.0;

import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```solidity
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```solidity
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

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

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(account),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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 {}

    /**
     * @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 {}

    /**
     * @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override.
     *
     * WARNING: Anyone calling this MUST ensure that the balances remain consistent with the ownership. The invariant
     * being that for any address `a` the value returned by `balanceOf(a)` must be equal to the number of tokens such
     * that `ownerOf(tokenId)` is `a`.
     */
    // solhint-disable-next-line func-name-mixedcase
    function __unsafe_increaseBalance(address account, uint256 amount) internal {
        _balances[account] += amount;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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 (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/extensions/ERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../ERC721.sol";
import "./IERC721Enumerable.sol";

/**
 * @dev This implements an optional extension of {ERC721} defined in the EIP that adds
 * enumerability of all the token ids in the contract as well as all token ids owned by each
 * account.
 */
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
    // Mapping from owner to list of owned token IDs
    mapping(address => mapping(uint256 => uint256)) private _ownedTokens;

    // Mapping from token ID to index of the owner tokens list
    mapping(uint256 => uint256) private _ownedTokensIndex;

    // Array with all token ids, used for enumeration
    uint256[] private _allTokens;

    // Mapping from token id to position in the allTokens array
    mapping(uint256 => uint256) private _allTokensIndex;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
        return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
        require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
        return _ownedTokens[owner][index];
    }

    /**
     * @dev See {IERC721Enumerable-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _allTokens.length;
    }

    /**
     * @dev See {IERC721Enumerable-tokenByIndex}.
     */
    function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
        require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
        return _allTokens[index];
    }

    /**
     * @dev See {ERC721-_beforeTokenTransfer}.
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 firstTokenId,
        uint256 batchSize
    ) internal virtual override {
        super._beforeTokenTransfer(from, to, firstTokenId, batchSize);

        if (batchSize > 1) {
            // Will only trigger during construction. Batch transferring (minting) is not available afterwards.
            revert("ERC721Enumerable: consecutive transfers not supported");
        }

        uint256 tokenId = firstTokenId;

        if (from == address(0)) {
            _addTokenToAllTokensEnumeration(tokenId);
        } else if (from != to) {
            _removeTokenFromOwnerEnumeration(from, tokenId);
        }
        if (to == address(0)) {
            _removeTokenFromAllTokensEnumeration(tokenId);
        } else if (to != from) {
            _addTokenToOwnerEnumeration(to, tokenId);
        }
    }

    /**
     * @dev Private function to add a token to this extension's ownership-tracking data structures.
     * @param to address representing the new owner of the given token ID
     * @param tokenId uint256 ID of the token to be added to the tokens list of the given address
     */
    function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
        uint256 length = ERC721.balanceOf(to);
        _ownedTokens[to][length] = tokenId;
        _ownedTokensIndex[tokenId] = length;
    }

    /**
     * @dev Private function to add a token to this extension's token tracking data structures.
     * @param tokenId uint256 ID of the token to be added to the tokens list
     */
    function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
        _allTokensIndex[tokenId] = _allTokens.length;
        _allTokens.push(tokenId);
    }

    /**
     * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
     * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
     * gas optimizations e.g. when performing a transfer operation (avoiding double writes).
     * This has O(1) time complexity, but alters the order of the _ownedTokens array.
     * @param from address representing the previous owner of the given token ID
     * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
     */
    function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
        // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
        uint256 tokenIndex = _ownedTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary
        if (tokenIndex != lastTokenIndex) {
            uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];

            _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
            _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
        }

        // This also deletes the contents at the last position of the array
        delete _ownedTokensIndex[tokenId];
        delete _ownedTokens[from][lastTokenIndex];
    }

    /**
     * @dev Private function to remove a token from this extension's token tracking data structures.
     * This has O(1) time complexity, but alters the order of the _allTokens array.
     * @param tokenId uint256 ID of the token to be removed from the tokens list
     */
    function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
        // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = _allTokens.length - 1;
        uint256 tokenIndex = _allTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
        // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
        // an 'if' statement (like in _removeTokenFromOwnerEnumeration)
        uint256 lastTokenId = _allTokens[lastTokenIndex];

        _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
        _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index

        // This also deletes the contents at the last position of the array
        delete _allTokensIndex[tokenId];
        _allTokens.pop();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}

// 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 v4.9.0) (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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [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://consensys.net/diligence/blog/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/v0.8.0/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 (last updated v4.9.4) (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;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/Math.sol";
import "./math/SignedMath.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 `int256` to its ASCII `string` decimal representation.
     */
    function toString(int256 value) internal pure returns (string memory) {
        return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
    }

    /**
     * @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);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// 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 v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 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 256, 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 << 3) < value ? 1 : 0);
        }
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { EnumerableSet } from '../../data/EnumerableSet.sol';
import { AddressUtils } from '../../utils/AddressUtils.sol';
import { UintUtils } from '../../utils/UintUtils.sol';
import { IAccessControlInternal } from './IAccessControlInternal.sol';
import { AccessControlStorage } from './AccessControlStorage.sol';

/**
 * @title Role-based access control system
 * @dev derived from https://github.com/OpenZeppelin/openzeppelin-contracts (MIT license)
 */
abstract contract AccessControlInternal is IAccessControlInternal {
    using AddressUtils for address;
    using EnumerableSet for EnumerableSet.AddressSet;
    using UintUtils for uint256;

    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    /*
     * @notice query whether role is assigned to account
     * @param role role to query
     * @param account account to query
     * @return whether role is assigned to account
     */
    function _hasRole(
        bytes32 role,
        address account
    ) internal view virtual returns (bool) {
        return
            AccessControlStorage.layout().roles[role].members.contains(account);
    }

    /**
     * @notice revert if sender does not have given role
     * @param role role to query
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, msg.sender);
    }

    /**
     * @notice revert if given account does not have given role
     * @param role role to query
     * @param account to query
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!_hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        'AccessControl: account ',
                        account.toString(),
                        ' is missing role ',
                        uint256(role).toHexString(32)
                    )
                )
            );
        }
    }

    /*
     * @notice query admin role for given role
     * @param role role to query
     * @return admin role
     */
    function _getRoleAdmin(
        bytes32 role
    ) internal view virtual returns (bytes32) {
        return AccessControlStorage.layout().roles[role].adminRole;
    }

    /**
     * @notice set role as admin role
     * @param role role to set
     * @param adminRole admin role to set
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = _getRoleAdmin(role);
        AccessControlStorage.layout().roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /*
     * @notice assign role to given account
     * @param role role to assign
     * @param account recipient of role assignment
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        AccessControlStorage.layout().roles[role].members.add(account);
        emit RoleGranted(role, account, msg.sender);
    }

    /*
     * @notice unassign role from given account
     * @param role role to unassign
     * @parm account
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        AccessControlStorage.layout().roles[role].members.remove(account);
        emit RoleRevoked(role, account, msg.sender);
    }

    /**
     * @notice relinquish role
     * @param role role to relinquish
     */
    function _renounceRole(bytes32 role) internal virtual {
        _revokeRole(role, msg.sender);
    }

    /**
     * @notice query role for member at given index
     * @param role role to query
     * @param index index to query
     */
    function _getRoleMember(
        bytes32 role,
        uint256 index
    ) internal view virtual returns (address) {
        return AccessControlStorage.layout().roles[role].members.at(index);
    }

    /**
     * @notice query role for member count
     * @param role role to query
     */
    function _getRoleMemberCount(
        bytes32 role
    ) internal view virtual returns (uint256) {
        return AccessControlStorage.layout().roles[role].members.length();
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { EnumerableSet } from '../../data/EnumerableSet.sol';

library AccessControlStorage {
    struct RoleData {
        EnumerableSet.AddressSet members;
        bytes32 adminRole;
    }

    struct Layout {
        mapping(bytes32 => RoleData) roles;
    }

    bytes32 internal constant DEFAULT_ADMIN_ROLE = 0x00;

    bytes32 internal constant STORAGE_SLOT =
        keccak256('solidstate.contracts.storage.AccessControl');

    function layout() internal pure returns (Layout storage l) {
        bytes32 slot = STORAGE_SLOT;
        assembly {
            l.slot := slot
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title Partial AccessControl interface needed by internal functions
 */
interface IAccessControlInternal {
    event RoleAdminChanged(
        bytes32 indexed role,
        bytes32 indexed previousAdminRole,
        bytes32 indexed newAdminRole
    );

    event RoleGranted(
        bytes32 indexed role,
        address indexed account,
        address indexed sender
    );

    event RoleRevoked(
        bytes32 indexed role,
        address indexed account,
        address indexed sender
    );
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;

/**
 * @title Set implementation with enumeration functions
 * @dev derived from https://github.com/OpenZeppelin/openzeppelin-contracts (MIT license)
 */
library EnumerableSet {
    error EnumerableSet__IndexOutOfBounds();

    struct Set {
        bytes32[] _values;
        // 1-indexed to allow 0 to signify nonexistence
        mapping(bytes32 => uint256) _indexes;
    }

    struct Bytes32Set {
        Set _inner;
    }

    struct AddressSet {
        Set _inner;
    }

    struct UintSet {
        Set _inner;
    }

    function at(
        Bytes32Set storage set,
        uint256 index
    ) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    function at(
        AddressSet storage set,
        uint256 index
    ) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    function at(
        UintSet storage set,
        uint256 index
    ) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    function contains(
        Bytes32Set storage set,
        bytes32 value
    ) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    function contains(
        AddressSet storage set,
        address value
    ) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    function contains(
        UintSet storage set,
        uint256 value
    ) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    function indexOf(
        Bytes32Set storage set,
        bytes32 value
    ) internal view returns (uint256) {
        return _indexOf(set._inner, value);
    }

    function indexOf(
        AddressSet storage set,
        address value
    ) internal view returns (uint256) {
        return _indexOf(set._inner, bytes32(uint256(uint160(value))));
    }

    function indexOf(
        UintSet storage set,
        uint256 value
    ) internal view returns (uint256) {
        return _indexOf(set._inner, bytes32(value));
    }

    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    function add(
        Bytes32Set storage set,
        bytes32 value
    ) internal returns (bool) {
        return _add(set._inner, value);
    }

    function add(
        AddressSet storage set,
        address value
    ) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    function remove(
        Bytes32Set storage set,
        bytes32 value
    ) internal returns (bool) {
        return _remove(set._inner, value);
    }

    function remove(
        AddressSet storage set,
        address value
    ) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    function remove(
        UintSet storage set,
        uint256 value
    ) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    function toArray(
        Bytes32Set storage set
    ) internal view returns (bytes32[] memory) {
        return set._inner._values;
    }

    function toArray(
        AddressSet storage set
    ) internal view returns (address[] memory) {
        bytes32[] storage values = set._inner._values;
        address[] storage array;

        assembly {
            array.slot := values.slot
        }

        return array;
    }

    function toArray(
        UintSet storage set
    ) internal view returns (uint256[] memory) {
        bytes32[] storage values = set._inner._values;
        uint256[] storage array;

        assembly {
            array.slot := values.slot
        }

        return array;
    }

    function _at(
        Set storage set,
        uint256 index
    ) private view returns (bytes32) {
        if (index >= set._values.length)
            revert EnumerableSet__IndexOutOfBounds();
        return set._values[index];
    }

    function _contains(
        Set storage set,
        bytes32 value
    ) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    function _indexOf(
        Set storage set,
        bytes32 value
    ) private view returns (uint256) {
        unchecked {
            return set._indexes[value] - 1;
        }
    }

    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    function _add(
        Set storage set,
        bytes32 value
    ) private returns (bool status) {
        if (!_contains(set, value)) {
            set._values.push(value);
            set._indexes[value] = set._values.length;
            status = true;
        }
    }

    function _remove(
        Set storage set,
        bytes32 value
    ) private returns (bool status) {
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            unchecked {
                bytes32 last = set._values[set._values.length - 1];

                // move last value to now-vacant index

                set._values[valueIndex - 1] = last;
                set._indexes[last] = valueIndex;
            }
            // clear last index

            set._values.pop();
            delete set._indexes[value];

            status = true;
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;

import { UintUtils } from './UintUtils.sol';

library AddressUtils {
    using UintUtils for uint256;

    error AddressUtils__InsufficientBalance();
    error AddressUtils__NotContract();
    error AddressUtils__SendValueFailed();

    function toString(address account) internal pure returns (string memory) {
        return uint256(uint160(account)).toHexString(20);
    }

    function isContract(address account) internal view returns (bool) {
        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    function sendValue(address payable account, uint256 amount) internal {
        (bool success, ) = account.call{ value: amount }('');
        if (!success) revert AddressUtils__SendValueFailed();
    }

    function functionCall(
        address target,
        bytes memory data
    ) internal returns (bytes memory) {
        return
            functionCall(target, data, 'AddressUtils: failed low-level call');
    }

    function functionCall(
        address target,
        bytes memory data,
        string memory error
    ) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, error);
    }

    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return
            functionCallWithValue(
                target,
                data,
                value,
                'AddressUtils: failed low-level call with value'
            );
    }

    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory error
    ) internal returns (bytes memory) {
        if (value > address(this).balance)
            revert AddressUtils__InsufficientBalance();
        return _functionCallWithValue(target, data, value, error);
    }

    /**
     * @notice execute arbitrary external call with limited gas usage and amount of copied return data
     * @dev derived from https://github.com/nomad-xyz/ExcessivelySafeCall (MIT License)
     * @param target recipient of call
     * @param gasAmount gas allowance for call
     * @param value native token value to include in call
     * @param maxCopy maximum number of bytes to copy from return data
     * @param data encoded call data
     * @return success whether call is successful
     * @return returnData copied return data
     */
    function excessivelySafeCall(
        address target,
        uint256 gasAmount,
        uint256 value,
        uint16 maxCopy,
        bytes memory data
    ) internal returns (bool success, bytes memory returnData) {
        returnData = new bytes(maxCopy);

        assembly {
            // execute external call via assembly to avoid automatic copying of return data
            success := call(
                gasAmount,
                target,
                value,
                add(data, 0x20),
                mload(data),
                0,
                0
            )

            // determine whether to limit amount of data to copy
            let toCopy := returndatasize()

            if gt(toCopy, maxCopy) {
                toCopy := maxCopy
            }

            // store the length of the copied bytes
            mstore(returnData, toCopy)

            // copy the bytes from returndata[0:toCopy]
            returndatacopy(add(returnData, 0x20), 0, toCopy)
        }
    }

    function _functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory error
    ) private returns (bytes memory) {
        if (!isContract(target)) revert AddressUtils__NotContract();

        (bool success, bytes memory returnData) = target.call{ value: value }(
            data
        );

        if (success) {
            return returnData;
        } else if (returnData.length > 0) {
            assembly {
                let returnData_size := mload(returnData)
                revert(add(32, returnData), returnData_size)
            }
        } else {
            revert(error);
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;

/**
 * @title utility functions for uint256 operations
 * @dev derived from https://github.com/OpenZeppelin/openzeppelin-contracts/ (MIT license)
 */
library UintUtils {
    error UintUtils__InsufficientHexLength();

    bytes16 private constant HEX_SYMBOLS = '0123456789abcdef';

    function add(uint256 a, int256 b) internal pure returns (uint256) {
        return b < 0 ? sub(a, -b) : a + uint256(b);
    }

    function sub(uint256 a, int256 b) internal pure returns (uint256) {
        return b < 0 ? add(a, -b) : a - uint256(b);
    }

    function toString(uint256 value) internal pure returns (string memory) {
        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);
    }

    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return '0x00';
        }

        uint256 length = 0;

        for (uint256 temp = value; temp != 0; temp >>= 8) {
            unchecked {
                length++;
            }
        }

        return toHexString(value, 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';

        unchecked {
            for (uint256 i = 2 * length + 1; i > 1; --i) {
                buffer[i] = HEX_SYMBOLS[value & 0xf];
                value >>= 4;
            }
        }

        if (value != 0) revert UintUtils__InsufficientHexLength();

        return string(buffer);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

import { ERC721 } from "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import { ERC721Enumerable } from "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import { AccessControl } from "@openzeppelin/contracts/access/AccessControl.sol";
import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import { GenerativeAiNftLogic } from "./libraries/GenerativeAiNftLogic.sol";
import { IGenAiNftFactory } from "./interfaces/IGenAiNftFactory.sol";

/**
 * @title TokenFiGenAiNft
 * @dev Non-upgradeable NFT contract deployed by the GenAiNftFactory diamond
 */
contract TokenFiGenAiNft is ERC721, ERC721Enumerable, AccessControl, ReentrancyGuard {
    using GenerativeAiNftLogic for *;
    string internal _baseURIStorage;

    mapping(uint256 => string) private _tokenURIs;
    uint256 public maxSupply;
    address public immutable diamondAddress;

    // Public mint settings
    bool public publicMintEnabled;
    uint256 public mintPrice; // Price in wei (native currency)
    uint256 public publicMintLastBlock;
    uint256 public publicBatchMintLastBlock;

    event PublicMintToggled(bool enabled);
    event MintPriceUpdated(uint256 newPrice);
    event PublicMint(uint256 previousBlock, address indexed to, uint256 indexed tokenId, uint256 price);
    event PublicBatchMint(uint256 previousBlock, address indexed to, uint256 quantity, uint256 totalPrice);
    event RefundSent(address indexed to, uint256 amount);
    event Withdrawn(address indexed recipient, uint256 amount);

    constructor(
        string memory name_,
        string memory symbol_,
        string memory baseURI_,
        uint256 maxSupply_,
        address adminAddress_,
        address diamondAddress_
    ) ERC721(name_, symbol_) {
        require(adminAddress_ != address(0), "Invalid admin address");
        require(diamondAddress_ != address(0), "Invalid diamond address");

        _baseURIStorage = baseURI_;
        maxSupply = maxSupply_;
        publicMintEnabled = false; // Disabled by default
        mintPrice = 0; // Free by default
        diamondAddress = diamondAddress_;

        _grantRole(DEFAULT_ADMIN_ROLE, adminAddress_);
    }

    function mint(address account, string memory tokenURI_) external onlyRole(DEFAULT_ADMIN_ROLE) {
        _mintToken(account, tokenURI_);
    }

    function mint(address account) external onlyRole(DEFAULT_ADMIN_ROLE) {
        _mintToken(account, "");
    }

    function batchMintWithURIs(address account, string[] memory tokenURIs) external onlyRole(DEFAULT_ADMIN_ROLE) {
        GenerativeAiNftLogic.validateBatchMint(tokenURIs, totalSupply(), maxSupply);

        for (uint256 i = 0; i < tokenURIs.length; i++) {
            _mintToken(account, tokenURIs[i]);
        }
    }

    function _mintToken(address account, string memory tokenURI_) internal {
        GenerativeAiNftLogic.validateMint(totalSupply(), maxSupply);

        uint256 newTokenId = totalSupply() + 1; // Token IDs start from 1
        _mint(account, newTokenId);

        // Only set custom URI if provided
        if (bytes(tokenURI_).length > 0) {
            _tokenURIs[newTokenId] = tokenURI_;
        }

        IGenAiNftFactory(diamondAddress).emitNftMintEvent(account, newTokenId, tokenURI_);
    }

    /**
     * @dev Internal function to collect payment and refund overpayment
     * @param quantity Number of tokens being minted
     * @return actualCost The actual cost paid (before refund)
     */
    function _collectPayment(uint256 quantity) internal returns (uint256 actualCost) {
        actualCost = GenerativeAiNftLogic.collectPayment(mintPrice, quantity);

        // Emit refund event if overpayment occurred
        uint256 overpayment = msg.value - actualCost;
        if (overpayment > 0) {
            emit RefundSent(msg.sender, overpayment);
        }
    }

    /**
     * @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 override returns (string memory) {
        return _baseURIStorage;
    }

    /**
     * @dev Returns the base URI
     */
    function baseURI() public view returns (string memory) {
        return _baseURIStorage;
    }

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

        return bytes(_tokenURIs[tokenId]).length > 0 ? _tokenURIs[tokenId] : super.tokenURI(tokenId);
    }

    /**
     * @dev Public mint function that can be called by anyone when enabled
     */
    function publicMint(string memory tokenURI_) external payable nonReentrant {
        require(publicMintEnabled, "Public mint is disabled");

        uint256 actualCost = _collectPayment(1);
        _mintToken(msg.sender, tokenURI_);

        emit PublicMint(publicMintLastBlock, msg.sender, totalSupply(), actualCost);
        publicMintLastBlock = block.number;
    }

    /**
     * @dev Public batch mint function that allows minting multiple NFTs at once
     * Follows Checks-Effects-Interactions: collect payment before minting to prevent reentrancy
     */
    function publicBatchMint(string[] memory tokenURIs) external payable nonReentrant {
        GenerativeAiNftLogic.validatePublicBatchMint(publicMintEnabled, tokenURIs, totalSupply(), maxSupply);

        uint256 actualCost = _collectPayment(tokenURIs.length);

        for (uint256 i = 0; i < tokenURIs.length; i++) {
            _mintToken(msg.sender, tokenURIs[i]);
        }

        emit PublicBatchMint(publicBatchMintLastBlock, msg.sender, tokenURIs.length, actualCost);
        publicBatchMintLastBlock = block.number;
    }

    /**
     * @dev Enable or disable public minting
     */
    function setPublicMintEnabled(bool enabled) external onlyRole(DEFAULT_ADMIN_ROLE) {
        publicMintEnabled = enabled;
        emit PublicMintToggled(enabled);
    }

    /**
     * @dev Set the price for public minting (in wei)
     */
    function setMintPrice(uint256 price) external onlyRole(DEFAULT_ADMIN_ROLE) {
        mintPrice = price;
        emit MintPriceUpdated(price);
    }

    /**
     * @dev Withdraw contract balance to admin
     */
    function withdraw() external onlyRole(DEFAULT_ADMIN_ROLE) {
        uint256 balance = address(this).balance;
        GenerativeAiNftLogic.withdraw(payable(msg.sender), balance);
        emit Withdrawn(msg.sender, balance);
    }

    /**
     * @dev Withdraw specific amount to a specific address
     */
    function withdrawTo(address payable recipient, uint256 amount) external onlyRole(DEFAULT_ADMIN_ROLE) {
        GenerativeAiNftLogic.withdrawTo(recipient, amount, address(this).balance);
        emit Withdrawn(recipient, amount);
    }

    function setBaseURI(string memory newBaseURI) external onlyRole(DEFAULT_ADMIN_ROLE) {
        _baseURIStorage = newBaseURI;
    }

    /**
     * @dev Returns all token IDs owned by a specific address
     * @param owner The address to query
     * @return An array of token IDs owned by the address
     */
    function tokensOfOwner(address owner) external view returns (uint256[] memory) {
        uint256 tokenCount = balanceOf(owner);
        uint256[] memory tokenIds = new uint256[](tokenCount);

        for (uint256 i = 0; i < tokenCount; i++) {
            tokenIds[i] = tokenOfOwnerByIndex(owner, i);
        }

        return tokenIds;
    }

    function supportsInterface(bytes4 interfaceId) public view override(ERC721, ERC721Enumerable, AccessControl) returns (bool) {
        return ERC721Enumerable.supportsInterface(interfaceId) || AccessControl.supportsInterface(interfaceId);
    }

    function _beforeTokenTransfer(address from, address to, uint256 firstTokenId, uint256 batchSize) internal virtual override(ERC721, ERC721Enumerable) {
        super._beforeTokenTransfer(from, to, firstTokenId, batchSize);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

interface IGenAiNftFactory {
    struct PaginatedNfts {
        address[] nfts;
        uint256 totalCount;
        uint256 currentPage;
        uint256 totalPages;
        uint256 offset;
        uint256 limit;
    }

    event NftDeployed(
        uint256 previousBlock,
        address indexed nftAddress,
        string name,
        string symbol,
        string baseURI,
        uint256 maxSupply,
        address indexed adminAddress,
        address indexed deployer
    );

    event NftMinted(uint256 previousBlock, address indexed nftAddress, address indexed to, uint256 indexed tokenId, string tokenURI);

    /**
     * @dev Called by deployed NFT contracts to emit mint events on the diamond
     * @param to The address receiving the NFT
     * @param tokenId The token ID that was minted
     * @param tokenURI The token URI (empty string if using base URI)
     */
    function emitNftMintEvent(address to, uint256 tokenId, string memory tokenURI) external;

    /**
     * @dev Deploy a new NFT contract
     * @param name_ The name of the NFT collection
     * @param symbol_ The symbol of the NFT collection
     * @param baseURI_ The base URI for token metadata
     * @param maxSupply_ Maximum supply (0 for unlimited)
     * @param adminAddress_ The admin address for the deployed NFT contract
     * @return The address of the newly deployed NFT contract
     */
    function deployNft(
        string memory name_,
        string memory symbol_,
        string memory baseURI_,
        uint256 maxSupply_,
        address adminAddress_
    ) external returns (address);

    /**
     * @dev Deploy a new NFT contract with msg.sender as admin
     * @param name_ The name of the NFT collection
     * @param symbol_ The symbol of the NFT collection
     * @param baseURI_ The base URI for token metadata
     * @param maxSupply_ Maximum supply (0 for unlimited)
     * @return The address of the newly deployed NFT contract
     */
    function deployNftWithSenderAsAdmin(string memory name_, string memory symbol_, string memory baseURI_, uint256 maxSupply_) external returns (address);

    /**
     * @dev Batch deploy multiple NFT contracts
     * @param names_ Array of names for the NFT collections
     * @param symbols_ Array of symbols for the NFT collections
     * @param baseURIs_ Array of base URIs for token metadata
     * @param maxSupplies_ Array of maximum supplies (0 for unlimited)
     * @param adminAddresses_ Array of admin addresses for the deployed NFT contracts
     * @return An array of addresses of the newly deployed NFT contracts
     */
    function batchDeployNft(
        string[] memory names_,
        string[] memory symbols_,
        string[] memory baseURIs_,
        uint256[] memory maxSupplies_,
        address[] memory adminAddresses_
    ) external returns (address[] memory);

    /**
     * @dev Get deployed NFT contracts with pagination
     * @param offset The starting index
     * @param limit The maximum number of items to return (0 for all remaining)
     * @return A PaginatedNfts struct containing NFT addresses and pagination details
     */
    function getDeployedNfts(uint256 offset, uint256 limit) external view returns (PaginatedNfts memory);

    /**
     * @dev Get the number of deployed NFT contracts
     * @return The count of deployed NFT contracts
     */
    function getDeployedNftsCount() external view returns (uint256);

    /**
     * @dev Get a deployed NFT contract by index
     * @param index The index of the deployed NFT contract
     * @return The address of the deployed NFT contract
     */
    function getDeployedNftByIndex(uint256 index) external view returns (address);

    /**
     * @dev Get all NFTs deployed by a specific user
     * @param deployer The address of the deployer
     * @return An array of addresses of NFTs deployed by the user
     */
    function getNftsByDeployer(address deployer) external view returns (address[] memory);

    /**
     * @dev Get the number of NFTs deployed by a specific user
     * @param deployer The address of the deployer
     * @return The count of NFTs deployed by the user
     */
    function getNftsCountByDeployer(address deployer) external view returns (uint256);

    struct LastBlockInfo {
        uint256 nftDeployedLastBlock;
        uint256 nftMintedLastBlock;
    }

    /**
     * @dev Get the last block numbers for various operations
     * @return A LastBlockInfo struct containing the last block numbers
     */
    function getLastBlockInfo() external view returns (LastBlockInfo memory);

    /**
     * @dev Predict the address where an NFT will be deployed using CREATE2
     * @param name_ The name of the NFT collection
     * @param symbol_ The symbol of the NFT collection
     * @param baseURI_ The base URI for token metadata
     * @param maxSupply_ Maximum supply (0 for unlimited)
     * @param adminAddress_ The admin address for the deployed NFT contract
     * @param deployer_ The address of the deployer
     * @return The predicted address where the NFT will be deployed
     */
    function predictNftAddress(
        string memory name_,
        string memory symbol_,
        string memory baseURI_,
        uint256 maxSupply_,
        address adminAddress_,
        address deployer_
    ) external view returns (address);

    /**
     * @dev Predict the address where an NFT will be deployed using CREATE2 with a specific nonce
     * @param name_ The name of the NFT collection
     * @param symbol_ The symbol of the NFT collection
     * @param baseURI_ The base URI for token metadata
     * @param maxSupply_ Maximum supply (0 for unlimited)
     * @param adminAddress_ The admin address for the deployed NFT contract
     * @param deployer_ The address of the deployer
     * @param nonce_ The nonce to use for the prediction
     * @return The predicted address where the NFT will be deployed
     */
    function predictNftAddressWithNonce(
        string memory name_,
        string memory symbol_,
        string memory baseURI_,
        uint256 maxSupply_,
        address adminAddress_,
        address deployer_,
        uint256 nonce_
    ) external view returns (address);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

/**
 * @title Create2Deployer
 * @dev Library for deploying contracts using CREATE2 opcode for deterministic addresses
 */
library Create2Deployer {
    /**
     * @dev Computes the CREATE2 address for a contract deployment
     * @param deployer The address that will deploy the contract (factory address)
     * @param userDeployer The address of the user deploying the NFT (used as salt)
     * @param nonce The nonce for this deployment (allows multiple deployments per user)
     * @param bytecodeHash The keccak256 hash of the contract bytecode + constructor args
     * @return The predicted address where the contract will be deployed
     */
    function computeAddress(address deployer, address userDeployer, uint256 nonce, bytes32 bytecodeHash) internal pure returns (address) {
        // Combine user deployer address and nonce as salt to allow multiple deployments per user
        bytes32 salt = keccak256(abi.encodePacked(userDeployer, nonce));
        bytes32 data = keccak256(abi.encodePacked(bytes1(0xff), deployer, salt, bytecodeHash));
        return address(uint160(uint256(data)));
    }

    /**
     * @dev Deploys a contract using CREATE2
     * @param bytecode The contract bytecode (including constructor args)
     * @param userDeployer The address of the user deploying the NFT (used as salt)
     * @param nonce The nonce for this deployment (allows multiple deployments per user)
     * @return deployedAddress The address of the deployed contract
     */
    function deploy(bytes memory bytecode, address userDeployer, uint256 nonce) internal returns (address deployedAddress) {
        // Combine user deployer address and nonce as salt to allow multiple deployments per user
        bytes32 salt = keccak256(abi.encodePacked(userDeployer, nonce));
        assembly {
            deployedAddress := create2(0, add(bytecode, 0x20), mload(bytecode), salt)
        }
        require(deployedAddress != address(0), "Create2: deployment failed");
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

/**
 * @title GenerativeAiNftLogic
 * @dev Library containing shared logic for Generative AI NFT contracts
 * This allows code reuse between upgradeable and non-upgradeable implementations
 */
library GenerativeAiNftLogic {
    /**
     * @dev Internal function to collect payment and refund overpayment
     * @param mintPrice The price per token
     * @param quantity Number of tokens being minted
     * @return actualCost The actual cost paid (before refund)
     */
    function collectPayment(uint256 mintPrice, uint256 quantity) internal returns (uint256 actualCost) {
        actualCost = mintPrice * quantity;
        require(msg.value >= actualCost, "Insufficient payment");

        // Refund overpayment if any
        uint256 overpayment = msg.value - actualCost;
        if (overpayment > 0) {
            (bool success, ) = payable(msg.sender).call{ value: overpayment }("");
            require(success, "Refund failed");
        }

        return actualCost;
    }

    /**
     * @dev Validate batch mint parameters
     * @param tokenURIs Array of token URIs
     * @param currentSupply Current total supply
     * @param maxSupply Maximum supply (0 = unlimited)
     */
    function validateBatchMint(string[] memory tokenURIs, uint256 currentSupply, uint256 maxSupply) internal pure {
        uint256 length = tokenURIs.length;
        require(length > 0, "Empty array");

        // Check max supply if it's not 0 (0 means unlimited)
        if (maxSupply > 0) {
            require(currentSupply + length <= maxSupply, "Exceeds max supply");
        }
    }

    /**
     * @dev Validate single mint against max supply
     * @param currentSupply Current total supply
     * @param maxSupply Maximum supply (0 = unlimited)
     */
    function validateMint(uint256 currentSupply, uint256 maxSupply) internal pure {
        // Check max supply if it's not 0 (0 means unlimited)
        if (maxSupply > 0) {
            require(currentSupply < maxSupply, "Max supply reached");
        }
    }

    /**
     * @dev Validate public batch mint
     * @param publicMintEnabled Whether public minting is enabled
     * @param tokenURIs Array of token URIs
     * @param currentSupply Current total supply
     * @param maxSupply Maximum supply (0 = unlimited)
     */
    function validatePublicBatchMint(bool publicMintEnabled, string[] memory tokenURIs, uint256 currentSupply, uint256 maxSupply) internal pure {
        require(publicMintEnabled, "Public mint is disabled");
        uint256 quantity = tokenURIs.length;
        require(quantity > 0, "Quantity must be greater than 0");

        // Check max supply if it's not 0 (0 means unlimited)
        if (maxSupply > 0) {
            require(currentSupply + quantity <= maxSupply, "Exceeds max supply");
        }
    }

    /**
     * @dev Withdraw contract balance
     * @param recipient Address to receive funds
     * @param balance Amount to withdraw
     */
    function withdraw(address payable recipient, uint256 balance) internal {
        require(balance > 0, "No funds to withdraw");

        (bool success, ) = recipient.call{ value: balance }("");
        require(success, "Withdrawal failed");
    }

    /**
     * @dev Withdraw specific amount to a specific address
     * @param recipient Address to receive funds
     * @param amount Amount to withdraw
     * @param contractBalance Current contract balance
     */
    function withdrawTo(address payable recipient, uint256 amount, uint256 contractBalance) internal {
        require(recipient != address(0), "Invalid recipient");
        require(amount <= contractBalance, "Insufficient contract balance");

        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Withdrawal failed");
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

import { EnumerableSet } from "@solidstate/contracts/data/EnumerableSet.sol";

/// @notice Storage for Generative AI NFT Factory

library LibGenAiNftFactoryStorage {
    using EnumerableSet for EnumerableSet.AddressSet;

    bytes32 internal constant DIAMOND_STORAGE_POSITION = keccak256("tokenfi.genainftfactory.diamond.storage");

    struct DiamondStorage {
        EnumerableSet.AddressSet deployedNfts; // Set of all deployed NFT contracts
        mapping(address => EnumerableSet.AddressSet) nftsByDeployer; // Mapping of deployer address to their deployed NFTs
        mapping(address => uint256) deployerNonces; // Mapping of deployer address to their deployment nonce
        uint256 nftDeployedLastBlock;
        uint256 nftMintedLastBlock;
    }

    function diamondStorage() internal pure returns (DiamondStorage storage ds) {
        bytes32 position = DIAMOND_STORAGE_POSITION;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            ds.slot := position
        }
    }
}

{
  "evmVersion": "london",
  "metadata": {
    "bytecodeHash": "none",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 10
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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[{"inputs":[],"name":"EnumerableSet__IndexOutOfBounds","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"previousBlock","type":"uint256"},{"indexed":true,"internalType":"address","name":"nftAddress","type":"address"},{"indexed":false,"internalType":"string","name":"name","type":"string"},{"indexed":false,"internalType":"string","name":"symbol","type":"string"},{"indexed":false,"internalType":"string","name":"baseURI","type":"string"},{"indexed":false,"internalType":"uint256","name":"maxSupply","type":"uint256"},{"indexed":true,"internalType":"address","name":"adminAddress","type":"address"},{"indexed":true,"internalType":"address","name":"deployer","type":"address"}],"name":"NftDeployed","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"previousBlock","type":"uint256"},{"indexed":true,"internalType":"address","name":"nftAddress","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"string","name":"tokenURI","type":"string"}],"name":"NftMinted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"previousAdminRole","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"newAdminRole","type":"bytes32"}],"name":"RoleAdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"inputs":[{"internalType":"string[]","name":"names_","type":"string[]"},{"internalType":"string[]","name":"symbols_","type":"string[]"},{"internalType":"string[]","name":"baseURIs_","type":"string[]"},{"internalType":"uint256[]","name":"maxSupplies_","type":"uint256[]"},{"internalType":"address[]","name":"adminAddresses_","type":"address[]"}],"name":"batchDeployNft","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"},{"internalType":"string","name":"baseURI_","type":"string"},{"internalType":"uint256","name":"maxSupply_","type":"uint256"},{"internalType":"address","name":"adminAddress_","type":"address"}],"name":"deployNft","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"},{"internalType":"string","name":"baseURI_","type":"string"},{"internalType":"uint256","name":"maxSupply_","type":"uint256"}],"name":"deployNftWithSenderAsAdmin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"string","name":"tokenURI","type":"string"}],"name":"emitNftMintEvent","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"getDeployedNftByIndex","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"offset","type":"uint256"},{"internalType":"uint256","name":"limit","type":"uint256"}],"name":"getDeployedNfts","outputs":[{"components":[{"internalType":"address[]","name":"nfts","type":"address[]"},{"internalType":"uint256","name":"totalCount","type":"uint256"},{"internalType":"uint256","name":"currentPage","type":"uint256"},{"internalType":"uint256","name":"totalPages","type":"uint256"},{"internalType":"uint256","name":"offset","type":"uint256"},{"internalType":"uint256","name":"limit","type":"uint256"}],"internalType":"struct IGenAiNftFactory.PaginatedNfts","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getDeployedNftsCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getLastBlockInfo","outputs":[{"components":[{"internalType":"uint256","name":"nftDeployedLastBlock","type":"uint256"},{"internalType":"uint256","name":"nftMintedLastBlock","type":"uint256"}],"internalType":"struct IGenAiNftFactory.LastBlockInfo","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"deployer","type":"address"}],"name":"getNftsByDeployer","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"deployer","type":"address"}],"name":"getNftsCountByDeployer","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"},{"internalType":"string","name":"baseURI_","type":"string"},{"internalType":"uint256","name":"maxSupply_","type":"uint256"},{"internalType":"address","name":"adminAddress_","type":"address"},{"internalType":"address","name":"deployer_","type":"address"}],"name":"predictNftAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"},{"internalType":"string","name":"baseURI_","type":"string"},{"internalType":"uint256","name":"maxSupply_","type":"uint256"},{"internalType":"address","name":"adminAddress_","type":"address"},{"internalType":"address","name":"deployer_","type":"address"},{"internalType":"uint256","name":"nonce_","type":"uint256"}],"name":"predictNftAddressWithNonce","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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