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// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";

import "../../../common/WithdrawExtension.sol";
import "../../../common/meta-transactions/ERC2771ContextOwnable.sol";
import "../../ERC721/extensions/ERC721RoyaltyExtension.sol";
import "../extensions/ERC721ACollectionMetadataExtension.sol";
import "../extensions/ERC721APrefixedMetadataExtension.sol";
import "../extensions/ERC721AMinterExtension.sol";
import "../extensions/ERC721AOwnerMintExtension.sol";
import "../extensions/ERC721APreSaleExtension.sol";
import "../extensions/ERC721APublicSaleExtension.sol";
import "../extensions/ERC721ARoleBasedMintExtension.sol";
import "../extensions/ERC721ARoleBasedLockableExtension.sol";

contract ERC721ASimpleSalesCollection is
    Initializable,
    Ownable,
    ERC165Storage,
    WithdrawExtension,
    ERC721ACollectionMetadataExtension,
    ERC721APrefixedMetadataExtension,
    ERC721AMinterExtension,
    ERC721AOwnerMintExtension,
    ERC721APreSaleExtension,
    ERC721APublicSaleExtension,
    ERC721ARoleBasedMintExtension,
    ERC721ARoleBasedLockableExtension,
    ERC721RoyaltyExtension,
    ERC2771ContextOwnable
{
    struct Config {
        string name;
        string symbol;
        string contractURI;
        string placeholderURI;
        string tokenURIPrefix;
        uint256 maxSupply;
        uint256 preSalePrice;
        uint256 preSaleMaxMintPerWallet;
        uint256 publicSalePrice;
        uint256 publicSaleMaxMintPerTx;
        address defaultRoyaltyAddress;
        uint16 defaultRoyaltyBps;
        address proceedsRecipient;
        address trustedForwarder;
    }

    constructor(Config memory config) ERC721A(config.name, config.symbol) {
        initialize(config, msg.sender);
    }

    function initialize(Config memory config, address deployer)
        public
        initializer
    {
        _setupRole(DEFAULT_ADMIN_ROLE, deployer);

        _transferOwnership(deployer);

        __WithdrawExtension_init(config.proceedsRecipient, WithdrawMode.ANYONE);
        __ERC721ACollectionMetadataExtension_init(
            config.name,
            config.symbol,
            config.contractURI
        );
        __ERC721APrefixedMetadataExtension_init(
            config.placeholderURI,
            config.tokenURIPrefix
        );
        __ERC721AMinterExtension_init(config.maxSupply);
        __ERC721AOwnerMintExtension_init();
        __ERC721ARoleBasedMintExtension_init(deployer);
        __ERC721ARoleBasedLockableExtension_init();
        __ERC721APreSaleExtension_init_unchained(
            config.preSalePrice,
            config.preSaleMaxMintPerWallet
        );
        __ERC721APublicSaleExtension_init(
            config.publicSalePrice,
            config.publicSaleMaxMintPerTx
        );
        __ERC721RoyaltyExtension_init(
            config.defaultRoyaltyAddress,
            config.defaultRoyaltyBps
        );
        __ERC2771ContextOwnable_init(config.trustedForwarder);
    }

    function _msgSender()
        internal
        view
        virtual
        override(ERC2771ContextOwnable, Context)
        returns (address sender)
    {
        return super._msgSender();
    }

    function _msgData()
        internal
        view
        virtual
        override(ERC2771ContextOwnable, Context)
        returns (bytes calldata)
    {
        return super._msgData();
    }

    function _beforeTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual override(ERC721A, ERC721ALockableExtension) {
        ERC721ALockableExtension._beforeTokenTransfers(
            from,
            to,
            startTokenId,
            quantity
        );
    }

    /* PUBLIC */

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(
            ERC165Storage,
            ERC721ACollectionMetadataExtension,
            ERC721APrefixedMetadataExtension,
            ERC721APreSaleExtension,
            ERC721APublicSaleExtension,
            ERC721AOwnerMintExtension,
            ERC721ARoleBasedMintExtension,
            ERC721ARoleBasedLockableExtension,
            ERC721RoyaltyExtension
        )
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function name()
        public
        view
        override(ERC721A, ERC721ACollectionMetadataExtension)
        returns (string memory)
    {
        return ERC721ACollectionMetadataExtension.name();
    }

    function symbol()
        public
        view
        override(ERC721A, ERC721ACollectionMetadataExtension)
        returns (string memory)
    {
        return ERC721ACollectionMetadataExtension.symbol();
    }

    function tokenURI(uint256 _tokenId)
        public
        view
        virtual
        override(ERC721A, ERC721APrefixedMetadataExtension)
        returns (string memory)
    {
        return ERC721APrefixedMetadataExtension.tokenURI(_tokenId);
    }

    function getInfo()
        external
        view
        returns (
            uint256 _maxSupply,
            uint256 _totalSupply,
            uint256 _senderBalance,
            uint256 _preSalePrice,
            uint256 _preSaleMaxMintPerWallet,
            uint256 _preSaleAlreadyClaimed,
            bool _preSaleActive,
            uint256 _publicSalePrice,
            uint256 _publicSaleMaxMintPerTx,
            bool _publicSaleActive
        )
    {
        uint256 balance = 0;

        if (_msgSender() != address(0)) {
            balance = this.balanceOf(_msgSender());
        }

        return (
            maxSupply,
            this.totalSupply(),
            balance,
            preSalePrice,
            preSaleMaxMintPerWallet,
            preSaleAllowlistClaimed[_msgSender()],
            preSaleStatus,
            publicSalePrice,
            publicSaleMaxMintPerTx,
            publicSaleStatus
        );
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

/**
 * Simple EIP2981 reference override implementation
 */
interface IEIP2981RoyaltyOverride is IERC165 {

    event TokenRoyaltyRemoved(uint256 tokenId);
    event TokenRoyaltySet(uint256 tokenId, address recipient, uint16 bps);
    event DefaultRoyaltySet(address recipient, uint16 bps);

    struct TokenRoyalty {
        address recipient;
        uint16 bps;
    }

    struct TokenRoyaltyConfig {
        uint256 tokenId;
        address recipient;
        uint16 bps;
    }

    /**
     * @dev Set per token royalties.  Passing a recipient of address(0) will delete any existing configuration
     */
    function setTokenRoyalties(TokenRoyaltyConfig[] calldata royalties) external;

    /**
     * @dev Get the number of token specific overrides.  Used to enumerate over all configurations
     */
    function getTokenRoyaltiesCount() external view returns(uint256);

    /**
     * @dev Get a token royalty configuration by index.  Use in conjunction with getTokenRoyaltiesCount to get all per token configurations
     */
    function getTokenRoyaltyByIndex(uint256 index) external view returns(TokenRoyaltyConfig memory);

    /**
     * @dev Set a default royalty configuration.  Will be used if no token specific configuration is set
     */
    function setDefaultRoyalty(TokenRoyalty calldata royalty) external;

}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";

import "./IRoyaltyOverride.sol";
import "../specs/IEIP2981.sol";

/**
 * Simple EIP2981 reference override implementation
 */
abstract contract EIP2981RoyaltyOverrideCore is IEIP2981, IEIP2981RoyaltyOverride, ERC165 {
    using EnumerableSet for EnumerableSet.UintSet;

    TokenRoyalty public defaultRoyalty;
    mapping(uint256 => TokenRoyalty) private _tokenRoyalties;
    EnumerableSet.UintSet private _tokensWithRoyalties;

    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return interfaceId == type(IEIP2981).interfaceId || interfaceId == type(IEIP2981RoyaltyOverride).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Sets token royalties. When you override this in the implementation contract
     * ensure that you access restrict it to the contract owner or admin
     */
    function _setTokenRoyalties(TokenRoyaltyConfig[] memory royaltyConfigs) internal {
        for (uint i = 0; i < royaltyConfigs.length; i++) {
            TokenRoyaltyConfig memory royaltyConfig = royaltyConfigs[i];
            require(royaltyConfig.bps < 10000, "Invalid bps");
            if (royaltyConfig.recipient == address(0)) {
                delete _tokenRoyalties[royaltyConfig.tokenId];
                _tokensWithRoyalties.remove(royaltyConfig.tokenId);
                emit TokenRoyaltyRemoved(royaltyConfig.tokenId);
            } else {
                _tokenRoyalties[royaltyConfig.tokenId] = TokenRoyalty(royaltyConfig.recipient, royaltyConfig.bps);
                _tokensWithRoyalties.add(royaltyConfig.tokenId);
                emit TokenRoyaltySet(royaltyConfig.tokenId, royaltyConfig.recipient, royaltyConfig.bps);
            }
        }
    }

    /**
     * @dev Sets default royalty. When you override this in the implementation contract
     * ensure that you access restrict it to the contract owner or admin
     */
    function _setDefaultRoyalty(TokenRoyalty memory royalty) internal {
        require(royalty.bps < 10000, "Invalid bps");
        defaultRoyalty = TokenRoyalty(royalty.recipient, royalty.bps);
        emit DefaultRoyaltySet(royalty.recipient, royalty.bps);
    }

    /**
     * @dev See {IEIP2981RoyaltyOverride-getTokenRoyaltiesCount}.
     */
    function getTokenRoyaltiesCount() external override view returns(uint256) {
        return _tokensWithRoyalties.length();
    }

    /**
     * @dev See {IEIP2981RoyaltyOverride-getTokenRoyaltyByIndex}.
     */
    function getTokenRoyaltyByIndex(uint256 index) external override view returns(TokenRoyaltyConfig memory) {
        uint256 tokenId = _tokensWithRoyalties.at(index);
        TokenRoyalty memory royalty = _tokenRoyalties[tokenId];
        return TokenRoyaltyConfig(tokenId, royalty.recipient, royalty.bps);
    }

    /**
     * @dev See {IEIP2981RoyaltyOverride-royaltyInfo}.
     */
    function royaltyInfo(uint256 tokenId, uint256 value) public override view returns (address, uint256) {
        if (_tokenRoyalties[tokenId].recipient != address(0)) {
            return (_tokenRoyalties[tokenId].recipient, value*_tokenRoyalties[tokenId].bps/10000);
        }
        if (defaultRoyalty.recipient != address(0) && defaultRoyalty.bps != 0) {
            return (defaultRoyalty.recipient, value*defaultRoyalty.bps/10000);
        }
        return (address(0), 0);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * EIP-2981
 */
interface IEIP2981 {
    /**
     * bytes4(keccak256("royaltyInfo(uint256,uint256)")) == 0x2a55205a
     *
     * => 0x2a55205a = 0x2a55205a
     */
    function royaltyInfo(uint256 tokenId, uint256 value) external view returns (address, uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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:
 *
 * ```
 * 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}:
 *
 * ```
 * 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.
 */
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(uint160(account), 20),
                        " 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.
     */
    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.
     */
    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`.
     */
    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.
     *
     * [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.
     */
    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.
     */
    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 v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/Address.sol";

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

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

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

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts. Equivalent to `reinitializer(1)`.
     */
    modifier initializer() {
        bool isTopLevelCall = _setInitializedVersion(1);
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

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

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

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

    function _setInitializedVersion(uint8 version) private returns (bool) {
        // If the contract is initializing we ignore whether _initialized is set in order to support multiple
        // inheritance patterns, but we only do this in the context of a constructor, and for the lowest level
        // of initializers, because in other contexts the contract may have been reentered.
        if (_initializing) {
            require(
                version == 1 && !Address.isContract(address(this)),
                "Initializable: contract is already initialized"
            );
            return false;
        } else {
            require(_initialized < version, "Initializable: contract is already initialized");
            _initialized = version;
            return true;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

        _;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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: balance query for the zero address");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _owners[tokenId];
        require(owner != address(0), "ERC721: owner query for nonexistent token");
        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) {
        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");

        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 owner nor approved for all"
        );

        _approve(to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        require(_exists(tokenId), "ERC721: approved query for nonexistent token");

        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: transfer caller is not owner nor approved");

        _transfer(from, to, tokenId);
    }

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

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
        _safeTransfer(from, to, tokenId, _data);
    }

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

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

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        require(_exists(tokenId), "ERC721: operator query for nonexistent token");
        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);

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

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

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

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721.ownerOf(tokenId);

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

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

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

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

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

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

        _beforeTokenTransfer(from, to, tokenId);

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

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

        emit Transfer(from, to, tokenId);

        _afterTokenTransfer(from, to, tokenId);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {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 a {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 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 {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

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

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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 be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

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

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

    /**
     * @dev 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 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 v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

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

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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

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

pragma solidity ^0.8.0;

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

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

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

pragma solidity ^0.8.0;

/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }

    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

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

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

    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

// 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/ERC165Storage.sol)

pragma solidity ^0.8.0;

import "./ERC165.sol";

/**
 * @dev Storage based implementation of the {IERC165} interface.
 *
 * Contracts may inherit from this and call {_registerInterface} to declare
 * their support of an interface.
 */
abstract contract ERC165Storage is ERC165 {
    /**
     * @dev Mapping of interface ids to whether or not it's supported.
     */
    mapping(bytes4 => bool) private _supportedInterfaces;

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

    /**
     * @dev Registers the contract as an implementer of the interface defined by
     * `interfaceId`. Support of the actual ERC165 interface is automatic and
     * registering its interface id is not required.
     *
     * See {IERC165-supportsInterface}.
     *
     * Requirements:
     *
     * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
     */
    function _registerInterface(bytes4 interfaceId) internal virtual {
        require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
        _supportedInterfaces[interfaceId] = true;
    }
}

// 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 v4.6.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/structs/BitMaps.sol)
pragma solidity ^0.8.0;

/**
 * @dev Library for managing uint256 to bool mapping in a compact and efficient way, providing the keys are sequential.
 * Largelly inspired by Uniswap's https://github.com/Uniswap/merkle-distributor/blob/master/contracts/MerkleDistributor.sol[merkle-distributor].
 */
library BitMaps {
    struct BitMap {
        mapping(uint256 => uint256) _data;
    }

    /**
     * @dev Returns whether the bit at `index` is set.
     */
    function get(BitMap storage bitmap, uint256 index) internal view returns (bool) {
        uint256 bucket = index >> 8;
        uint256 mask = 1 << (index & 0xff);
        return bitmap._data[bucket] & mask != 0;
    }

    /**
     * @dev Sets the bit at `index` to the boolean `value`.
     */
    function setTo(
        BitMap storage bitmap,
        uint256 index,
        bool value
    ) internal {
        if (value) {
            set(bitmap, index);
        } else {
            unset(bitmap, index);
        }
    }

    /**
     * @dev Sets the bit at `index`.
     */
    function set(BitMap storage bitmap, uint256 index) internal {
        uint256 bucket = index >> 8;
        uint256 mask = 1 << (index & 0xff);
        bitmap._data[bucket] |= mask;
    }

    /**
     * @dev Unsets the bit at `index`.
     */
    function unset(BitMap storage bitmap, uint256 index) internal {
        uint256 bucket = index >> 8;
        uint256 mask = 1 << (index & 0xff);
        bitmap._data[bucket] &= ~mask;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/structs/EnumerableSet.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

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

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

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

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

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

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

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

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

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

            return true;
        } else {
            return false;
        }
    }

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

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

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

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

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

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

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

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

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

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

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

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

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

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

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

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

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

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

        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

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

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

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

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

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

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

        assembly {
            result := store
        }

        return result;
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721CollectionMetadataExtension.sol";

interface IERC721AutoIdMinterExtension {
    function setMaxSupply(uint256 newValue) external;

    function freezeMaxSupply() external;

    function totalSupply() external view returns (uint256);
}

/**
 * @dev Extension to add minting capability with an auto incremented ID for each token and a maximum supply setting.
 */
abstract contract ERC721AutoIdMinterExtension is
    IERC721AutoIdMinterExtension,
    ERC721CollectionMetadataExtension
{
    using SafeMath for uint256;

    uint256 public maxSupply;
    bool public maxSupplyFrozen;

    uint256 internal _currentTokenId = 0;

    function __ERC721AutoIdMinterExtension_init(uint256 _maxSupply)
        internal
        onlyInitializing
    {
        __ERC721AutoIdMinterExtension_init_unchained(_maxSupply);
    }

    function __ERC721AutoIdMinterExtension_init_unchained(uint256 _maxSupply)
        internal
        onlyInitializing
    {
        maxSupply = _maxSupply;

        _registerInterface(type(IERC721AutoIdMinterExtension).interfaceId);
        _registerInterface(type(IERC721).interfaceId);
    }

    /* ADMIN */

    function setMaxSupply(uint256 newValue) external onlyOwner {
        require(!maxSupplyFrozen, "FROZEN");
        maxSupply = newValue;
    }

    function freezeMaxSupply() external onlyOwner {
        maxSupplyFrozen = true;
    }

    /* PUBLIC */

    function totalSupply() public view returns (uint256) {
        return _currentTokenId;
    }

    /* INTERNAL */

    function _mintTo(address to, uint256 count) internal {
        require(totalSupply() + count <= maxSupply, "EXCEEDS_SUPPLY");

        for (uint256 i = 0; i < count; i++) {
            uint256 newTokenId = _currentTokenId;
            _safeMint(to, newTokenId);
            _incrementTokenId();
        }
    }

    /**
     * Increments the value of _currentTokenId
     */
    function _incrementTokenId() internal {
        _currentTokenId++;
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";

interface IERC721CollectionMetadataExtension {
    function setContractURI(string memory newValue) external;

    function contractURI() external view returns (string memory);
}

/**
 * @dev Extension to allow configuring contract-level collection metadata URI.
 */
abstract contract ERC721CollectionMetadataExtension is
    Initializable,
    Ownable,
    ERC165Storage,
    ERC721
{
    string private _name;

    string private _symbol;

    string private _contractURI;

    function __ERC721CollectionMetadataExtension_init(
        string memory name_,
        string memory symbol_,
        string memory contractURI_
    ) internal onlyInitializing {
        __ERC721CollectionMetadataExtension_init_unchained(
            name_,
            symbol_,
            contractURI_
        );
    }

    function __ERC721CollectionMetadataExtension_init_unchained(
        string memory name_,
        string memory symbol_,
        string memory contractURI_
    ) internal onlyInitializing {
        _name = name_;
        _symbol = symbol_;
        _contractURI = contractURI_;

        _registerInterface(
            type(IERC721CollectionMetadataExtension).interfaceId
        );
        _registerInterface(type(IERC721).interfaceId);
        _registerInterface(type(IERC721Metadata).interfaceId);
    }

    /* ADMIN */

    function setContractURI(string memory newValue) external onlyOwner {
        _contractURI = newValue;
    }

    /* PUBLIC */

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function name() public view virtual override returns (string memory) {
        return _name;
    }

    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    function contractURI() public view returns (string memory) {
        return _contractURI;
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721AutoIdMinterExtension.sol";

interface IERC721OwnerMintExtension {
    function mintByOwner(address to, uint256 count) external;
}

/**
 * @dev Extension to allow owner to mint directly without paying.
 */
abstract contract ERC721OwnerMintExtension is
    IERC721OwnerMintExtension,
    Initializable,
    Ownable,
    ERC165Storage,
    ERC721AutoIdMinterExtension
{
    function __ERC721OwnerMintExtension_init() internal onlyInitializing {
        __ERC721OwnerMintExtension_init_unchained();
    }

    function __ERC721OwnerMintExtension_init_unchained()
        internal
        onlyInitializing
    {
        _registerInterface(type(IERC721OwnerMintExtension).interfaceId);
    }

    /* ADMIN */

    function mintByOwner(address to, uint256 count) external onlyOwner {
        _mintTo(to, count);
    }

    /* PUBLIC */

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721CollectionMetadataExtension)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721AutoIdMinterExtension.sol";

interface IERC721PreSaleExtension {
    function setPreSalePrice(uint256 newValue) external;

    function setPreSaleMaxMintPerWallet(uint256 newValue) external;

    function setAllowlistMerkleRoot(bytes32 newRoot) external;

    function togglePreSaleStatus(bool isActive) external;

    function onPreSaleAllowList(address minter, bytes32[] calldata proof)
        external
        view
        returns (bool);

    function mintPreSale(uint256 count, bytes32[] calldata proof)
        external
        payable;
}

/**
 * @dev Extension to provide pre-sale capabilities for certain collectors to mint for a specific price.
 */
abstract contract ERC721PreSaleExtension is
    IERC721PreSaleExtension,
    Initializable,
    ERC165Storage,
    ERC721AutoIdMinterExtension,
    ReentrancyGuard
{
    uint256 public preSalePrice;
    uint256 public preSaleMaxMintPerWallet;
    bytes32 public preSaleAllowlistMerkleRoot;
    bool public preSaleStatus;

    mapping(address => uint256) internal preSaleAllowlistClaimed;

    function __ERC721PreSaleExtension_init(
        uint256 _preSalePrice,
        uint256 _preSaleMaxMintPerWallet
    ) internal onlyInitializing {
        __ERC721PreSaleExtension_init_unchained(
            _preSalePrice,
            _preSaleMaxMintPerWallet
        );
    }

    function __ERC721PreSaleExtension_init_unchained(
        uint256 _preSalePrice,
        uint256 _preSaleMaxMintPerWallet
    ) internal onlyInitializing {
        _registerInterface(type(IERC721PreSaleExtension).interfaceId);

        preSalePrice = _preSalePrice;
        preSaleMaxMintPerWallet = _preSaleMaxMintPerWallet;
    }

    /* ADMIN */

    function setPreSalePrice(uint256 newValue) external onlyOwner {
        preSalePrice = newValue;
    }

    function setPreSaleMaxMintPerWallet(uint256 newValue) external onlyOwner {
        preSaleMaxMintPerWallet = newValue;
    }

    function setAllowlistMerkleRoot(bytes32 newRoot) external onlyOwner {
        preSaleAllowlistMerkleRoot = newRoot;
    }

    function togglePreSaleStatus(bool isActive) external onlyOwner {
        preSaleStatus = isActive;
    }

    /* PUBLIC */

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721CollectionMetadataExtension)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function onPreSaleAllowList(address minter, bytes32[] calldata proof)
        external
        view
        returns (bool)
    {
        return
            MerkleProof.verify(
                proof,
                preSaleAllowlistMerkleRoot,
                _generateMerkleLeaf(minter)
            );
    }

    function mintPreSale(uint256 count, bytes32[] calldata proof)
        external
        payable
        nonReentrant
    {
        require(preSaleStatus, "NOT_ACTIVE");

        address to = _msgSender();

        require(
            MerkleProof.verify(
                proof,
                preSaleAllowlistMerkleRoot,
                _generateMerkleLeaf(to)
            ),
            "WRONG_PROOF"
        );
        require(
            preSaleAllowlistClaimed[to] + count <= preSaleMaxMintPerWallet,
            "PRE_SALE_LIMIT"
        );
        require(preSalePrice * count <= msg.value, "INSUFFICIENT_AMOUNT");

        preSaleAllowlistClaimed[to] += count;

        _mintTo(to, count);
    }

    /* INTERNAL */

    function _generateMerkleLeaf(address account)
        internal
        pure
        returns (bytes32)
    {
        return keccak256(abi.encodePacked(account));
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721CollectionMetadataExtension.sol";

interface IERC721PrefixedMetadataExtension {
    function setPlaceholderURI(string memory newValue) external;

    function setTokenURIPrefix(string memory newValue) external;

    function setTokenURISuffix(string memory newValue) external;

    function placeholderURI() external view returns (string memory);

    function tokenURIPrefix() external view returns (string memory);

    function tokenURISuffix() external view returns (string memory);

    function tokenURI(uint256 _tokenId) external view returns (string memory);

    function freezeTokenURI() external;
}

/**
 * @dev Extension to allow configuring tokens metadata URI.
 *      In this extension tokens will have a shared token URI prefix,
 *      therefore on tokenURI() token's ID will be appended to the base URI.
 *      It also allows configuring a fallback "placeholder" URI when prefix is not set yet.
 */
abstract contract ERC721PrefixedMetadataExtension is
    IERC721PrefixedMetadataExtension,
    Initializable,
    Ownable,
    ERC165Storage,
    ERC721
{
    string internal _placeholderURI;
    string internal _tokenURIPrefix;
    string internal _tokenURISuffix;

    bool public tokenURIFrozen;

    function __ERC721PrefixedMetadataExtension_init(
        string memory placeholderURI_,
        string memory tokenURIPrefix_
    ) internal onlyInitializing {
        __ERC721PrefixedMetadataExtension_init_unchained(
            placeholderURI_,
            tokenURIPrefix_
        );
    }

    function __ERC721PrefixedMetadataExtension_init_unchained(
        string memory placeholderURI_,
        string memory tokenURIPrefix_
    ) internal onlyInitializing {
        _placeholderURI = placeholderURI_;
        _tokenURIPrefix = tokenURIPrefix_;
        _tokenURISuffix = ".json";

        _registerInterface(type(IERC721PrefixedMetadataExtension).interfaceId);
        _registerInterface(type(IERC721Metadata).interfaceId);
    }

    /* ADMIN */

    function setPlaceholderURI(string memory newValue) external onlyOwner {
        _placeholderURI = newValue;
    }

    function setTokenURIPrefix(string memory newValue) external onlyOwner {
        require(!tokenURIFrozen, "FROZEN");
        _tokenURIPrefix = newValue;
    }

    function setTokenURISuffix(string memory newValue) external onlyOwner {
        require(!tokenURIFrozen, "FROZEN");
        _tokenURISuffix = newValue;
    }

    function freezeTokenURI() external onlyOwner {
        tokenURIFrozen = true;
    }

    /* PUBLIC */

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function placeholderURI() public view returns (string memory) {
        return _placeholderURI;
    }

    function tokenURIPrefix() public view returns (string memory) {
        return _tokenURIPrefix;
    }

    function tokenURISuffix() public view returns (string memory) {
        return _tokenURISuffix;
    }

    function tokenURI(uint256 _tokenId)
        public
        view
        virtual
        override(ERC721, IERC721PrefixedMetadataExtension)
        returns (string memory)
    {
        return
            bytes(_tokenURIPrefix).length > 0
                ? string(
                    abi.encodePacked(
                        _tokenURIPrefix,
                        Strings.toString(_tokenId),
                        _tokenURISuffix
                    )
                )
                : _placeholderURI;
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721AutoIdMinterExtension.sol";

interface IERC721PublicSaleExtension {
    function setPublicSalePrice(uint256 newValue) external;

    function setPublicSaleMaxMintPerTx(uint256 newValue) external;

    function togglePublicSaleStatus(bool isActive) external;

    function mintPublicSale(address to, uint256 count) external payable;
}

/**
 * @dev Extension to provide pre-sale and public-sale capabilities for collectors to mint for a specific price.
 */
abstract contract ERC721PublicSaleExtension is
    IERC721PublicSaleExtension,
    Initializable,
    Ownable,
    ERC165Storage,
    ERC721AutoIdMinterExtension,
    ReentrancyGuard
{
    uint256 public publicSalePrice;
    uint256 public publicSaleMaxMintPerTx;
    bool public publicSaleStatus;

    function __ERC721PublicSaleExtension_init(
        uint256 _publicSalePrice,
        uint256 _publicSaleMaxMintPerTx
    ) internal onlyInitializing {
        __ERC721PublicSaleExtension_init_unchained(
            _publicSalePrice,
            _publicSaleMaxMintPerTx
        );
    }

    function __ERC721PublicSaleExtension_init_unchained(
        uint256 _publicSalePrice,
        uint256 _publicSaleMaxMintPerTx
    ) internal onlyInitializing {
        _registerInterface(type(IERC721PublicSaleExtension).interfaceId);

        publicSalePrice = _publicSalePrice;
        publicSaleMaxMintPerTx = _publicSaleMaxMintPerTx;
    }

    /* ADMIN */

    function setPublicSalePrice(uint256 newValue) external onlyOwner {
        publicSalePrice = newValue;
    }

    function setPublicSaleMaxMintPerTx(uint256 newValue) external onlyOwner {
        publicSaleMaxMintPerTx = newValue;
    }

    function togglePublicSaleStatus(bool isActive) external onlyOwner {
        publicSaleStatus = isActive;
    }

    /* PUBLIC */

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721CollectionMetadataExtension)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function mintPublicSale(address to, uint256 count)
        external
        payable
        nonReentrant
    {
        require(publicSaleStatus, "PUBLIC_SALE_NOT_ACTIVE");
        require(count <= publicSaleMaxMintPerTx, "PUBLIC_SALE_LIMIT");
        require(publicSalePrice * count <= msg.value, "INSUFFICIENT_AMOUNT");

        _mintTo(to, count);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721AutoIdMinterExtension.sol";

interface IERC721RoleBasedMintExtension {
    function mintByRole(address to, uint256 count) external;
}

/**
 * @dev Extension to allow holders of a OpenZepplin-based role to mint directly.
 */
abstract contract ERC721RoleBasedMintExtension is
    IERC721RoleBasedMintExtension,
    Initializable,
    ERC165Storage,
    ERC721AutoIdMinterExtension,
    AccessControl
{
    bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");

    function __ERC721RoleBasedMintExtension_init(address minter)
        internal
        onlyInitializing
    {
        __ERC721RoleBasedMintExtension_init_unchained(minter);
    }

    function __ERC721RoleBasedMintExtension_init_unchained(address minter)
        internal
        onlyInitializing
    {
        _registerInterface(type(IERC721RoleBasedMintExtension).interfaceId);

        _setupRole(MINTER_ROLE, minter);
    }

    /* ADMIN */

    function mintByRole(address to, uint256 count) external {
        require(hasRole(MINTER_ROLE, _msgSender()), "NOT_MINTER_ROLE");

        _mintTo(to, count);
    }

    /* PUBLIC */

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(
            ERC165Storage,
            AccessControl,
            ERC721CollectionMetadataExtension
        )
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@manifoldxyz/royalty-registry-solidity/contracts/overrides/IRoyaltyOverride.sol";
import "@manifoldxyz/royalty-registry-solidity/contracts/overrides/RoyaltyOverrideCore.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "../../../misc/rarible/IRoyalties.sol";
import "../../../misc/rarible/LibPart.sol";
import "../../../misc/rarible/LibRoyaltiesV2.sol";

interface IERC721RoyaltyExtension {
    function setTokenRoyalties(
        IEIP2981RoyaltyOverride.TokenRoyaltyConfig[] calldata royaltyConfigs
    ) external;

    function setDefaultRoyalty(
        IEIP2981RoyaltyOverride.TokenRoyalty calldata royalty
    ) external;

    function getRaribleV2Royalties(uint256 id)
        external
        view
        returns (LibPart.Part[] memory result);
}

/**
 * @dev Extension to signal configured royalty to famous marketplaces as well as ERC2981.
 *
 * This extension currently supports Standard ERC2981, Rarible.
 * Note that OpenSea is supported via Flair metadata feature.
 */
abstract contract ERC721RoyaltyExtension is
    IERC721RoyaltyExtension,
    IRoyalties,
    Initializable,
    Ownable,
    ERC165Storage,
    EIP2981RoyaltyOverrideCore
{
    function __ERC721RoyaltyExtension_init(
        address defaultRoyaltyReceiver,
        uint16 defaultRoyaltyBps
    ) internal onlyInitializing {
        __ERC721RoyaltyExtension_init_unchained(
            defaultRoyaltyReceiver,
            defaultRoyaltyBps
        );
    }

    function __ERC721RoyaltyExtension_init_unchained(
        address defaultRoyaltyReceiver,
        uint16 defaultRoyaltyBps
    ) internal onlyInitializing {
        _registerInterface(type(IERC721RoyaltyExtension).interfaceId);
        _registerInterface(type(IEIP2981).interfaceId);
        _registerInterface(type(IEIP2981RoyaltyOverride).interfaceId);
        _registerInterface(LibRoyaltiesV2._INTERFACE_ID_ROYALTIES);

        TokenRoyalty memory royalty = TokenRoyalty(
            defaultRoyaltyReceiver,
            defaultRoyaltyBps
        );

        _setDefaultRoyalty(royalty);
    }

    function setTokenRoyalties(TokenRoyaltyConfig[] calldata royaltyConfigs)
        external
        override(IEIP2981RoyaltyOverride, IERC721RoyaltyExtension)
        onlyOwner
    {
        _setTokenRoyalties(royaltyConfigs);
    }

    function setDefaultRoyalty(TokenRoyalty calldata royalty)
        external
        override(IEIP2981RoyaltyOverride, IERC721RoyaltyExtension)
        onlyOwner
    {
        _setDefaultRoyalty(royalty);
    }

    function getRaribleV2Royalties(uint256 id)
        external
        view
        override(IRoyalties, IERC721RoyaltyExtension)
        returns (LibPart.Part[] memory result)
    {
        result = new LibPart.Part[](1);

        result[0].account = payable(defaultRoyalty.recipient);
        result[0].value = defaultRoyalty.bps;

        id;
        // avoid unused param warning
    }

    /* PUBLIC */

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, EIP2981RoyaltyOverrideCore)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";

import "erc721a/contracts/ERC721A.sol";

import {IERC721CollectionMetadataExtension} from "../../ERC721/extensions/ERC721CollectionMetadataExtension.sol";

/**
 * @dev Extension to allow configuring contract-level collection metadata URI.
 */
abstract contract ERC721ACollectionMetadataExtension is
    IERC721CollectionMetadataExtension,
    Initializable,
    Ownable,
    ERC165Storage,
    ERC721A
{
    string private _name;

    string private _symbol;

    string private _contractURI;

    function __ERC721ACollectionMetadataExtension_init(
        string memory name_,
        string memory symbol_,
        string memory contractURI_
    ) internal onlyInitializing {
        __ERC721ACollectionMetadataExtension_init_unchained(
            name_,
            symbol_,
            contractURI_
        );
    }

    function __ERC721ACollectionMetadataExtension_init_unchained(
        string memory name_,
        string memory symbol_,
        string memory contractURI_
    ) internal onlyInitializing {
        _name = name_;
        _symbol = symbol_;
        _contractURI = contractURI_;

        _registerInterface(
            type(IERC721CollectionMetadataExtension).interfaceId
        );
        _registerInterface(type(IERC721).interfaceId);
        _registerInterface(type(IERC721Metadata).interfaceId);
    }

    /* ADMIN */

    function setContractURI(string memory newValue) external onlyOwner {
        _contractURI = newValue;
    }

    /* PUBLIC */

    function name() public view virtual override returns (string memory) {
        return _name;
    }

    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721A)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function contractURI() public view returns (string memory) {
        return _contractURI;
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";
import "@openzeppelin/contracts/utils/structs/BitMaps.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

import "./ERC721AMinterExtension.sol";

interface IERC721ALockableExtension {
    function locked(uint256 tokenId) external view returns (bool);

    function lock(uint256 tokenId) external;

    function lock(uint256[] calldata tokenIds) external;

    function unlock(uint256 tokenId) external;

    function unlock(uint256[] calldata tokenIds) external;
}

/**
 * @dev Extension to allow locking NFTs, for use-cases like staking, without leaving holders wallet.
 */
abstract contract ERC721ALockableExtension is
    IERC721ALockableExtension,
    Initializable,
    ERC165Storage,
    ERC721AMinterExtension,
    ReentrancyGuard
{
    using BitMaps for BitMaps.BitMap;

    BitMaps.BitMap internal lockedTokens;

    function __ERC721ALockableExtension_init() internal onlyInitializing {
        __ERC721ALockableExtension_init_unchained();
    }

    function __ERC721ALockableExtension_init_unchained()
        internal
        onlyInitializing
    {
        _registerInterface(type(IERC721ALockableExtension).interfaceId);
    }

    // PUBLIC

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721ACollectionMetadataExtension)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    /**
     * At this moment staking is only possible from a certain address (usually a smart contract).
     *
     * This is because in almost all cases you want another contract to perform custom logic on lock and unlock operations,
     * without allowing users to directly unlock their tokens and sell them, for example.
     */
    function _lock(uint256 tokenId) internal virtual {
        require(!lockedTokens.get(tokenId), "LOCKED");
        lockedTokens.set(tokenId);
    }

    function _unlock(uint256 tokenId) internal virtual {
        require(lockedTokens.get(tokenId), "NOT_LOCKED");
        lockedTokens.unset(tokenId);
    }

    /**
     * Returns if a token is locked or not.
     */
    function locked(uint256 tokenId) public view virtual returns (bool) {
        return lockedTokens.get(tokenId);
    }

    function filterUnlocked(uint256[] calldata ticketTokenIds)
        public
        view
        returns (uint256[] memory)
    {
        uint256[] memory unlocked = new uint256[](ticketTokenIds.length);

        for (uint256 i = 0; i < ticketTokenIds.length; i++) {
            if (!locked(ticketTokenIds[i])) {
                unlocked[i] = ticketTokenIds[i];
            }
        }

        return unlocked;
    }

    function _beforeTokenTransfers(
        address from,
        address to,
        uint256 startTokenId,
        uint256 quantity
    ) internal virtual override(ERC721A) {
        require(
            // We are not checking the quantity because it is only used during mint where users cannot stake/unstake.
            !lockedTokens.get(startTokenId),
            "LOCKED"
        );
        super._beforeTokenTransfers(from, to, startTokenId, quantity);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "erc721a/contracts/ERC721A.sol";

import {IERC721AutoIdMinterExtension} from "../../ERC721/extensions/ERC721AutoIdMinterExtension.sol";

import "./ERC721ACollectionMetadataExtension.sol";

/**
 * @dev Extension to add minting capability with an auto incremented ID for each token and a maximum supply setting.
 */
abstract contract ERC721AMinterExtension is ERC721ACollectionMetadataExtension {
    using SafeMath for uint256;

    uint256 public maxSupply;
    bool public maxSupplyFrozen;

    function __ERC721AMinterExtension_init(uint256 _maxSupply)
        internal
        onlyInitializing
    {
        __ERC721AMinterExtension_init_unchained(_maxSupply);
    }

    function __ERC721AMinterExtension_init_unchained(uint256 _maxSupply)
        internal
        onlyInitializing
    {
        maxSupply = _maxSupply;

        _registerInterface(type(IERC721AutoIdMinterExtension).interfaceId);
        _registerInterface(type(IERC721).interfaceId);
        _registerInterface(type(IERC721A).interfaceId);
    }

    /* ADMIN */

    function setMaxSupply(uint256 newValue) external onlyOwner {
        require(!maxSupplyFrozen, "BASE_URI_FROZEN");
        maxSupply = newValue;
    }

    function freezeMaxSupply() external onlyOwner {
        maxSupplyFrozen = true;
    }

    /* INTERNAL */

    function _mintTo(address to, uint256 count) internal {
        require(totalSupply() + count <= maxSupply, "EXCEEDS_SUPPLY");
        _safeMint(to, count);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721AMinterExtension.sol";

import {IERC721OwnerMintExtension} from "../../ERC721/extensions/ERC721OwnerMintExtension.sol";

/**
 * @dev Extension to allow owner to mint directly without paying.
 */
abstract contract ERC721AOwnerMintExtension is
    IERC721OwnerMintExtension,
    Initializable,
    Ownable,
    ERC165Storage,
    ERC721AMinterExtension
{
    function __ERC721AOwnerMintExtension_init() internal onlyInitializing {
        __ERC721AOwnerMintExtension_init_unchained();
    }

    function __ERC721AOwnerMintExtension_init_unchained()
        internal
        onlyInitializing
    {
        _registerInterface(type(IERC721OwnerMintExtension).interfaceId);
    }

    /* ADMIN */

    function mintByOwner(address to, uint256 count) external onlyOwner {
        _mintTo(to, count);
    }

    /* PUBLIC */

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721ACollectionMetadataExtension)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "erc721a/contracts/ERC721A.sol";

import "./ERC721AMinterExtension.sol";

import {IERC721PreSaleExtension} from "../../ERC721/extensions/ERC721PreSaleExtension.sol";

/**
 * @dev Extension to provide pre-sale capabilities for certain collectors to mint for a specific price.
 */
abstract contract ERC721APreSaleExtension is
    IERC721PreSaleExtension,
    Initializable,
    ERC165Storage,
    ERC721AMinterExtension,
    ReentrancyGuard
{
    uint256 public preSalePrice;
    uint256 public preSaleMaxMintPerWallet;
    bytes32 public preSaleAllowlistMerkleRoot;
    bool public preSaleStatus;

    mapping(address => uint256) internal preSaleAllowlistClaimed;

    function __ERC721APreSaleExtension_init(
        uint256 _preSalePrice,
        uint256 _preSaleMaxMintPerWallet
    ) internal onlyInitializing {
        __ERC721APreSaleExtension_init_unchained(
            _preSalePrice,
            _preSaleMaxMintPerWallet
        );
    }

    function __ERC721APreSaleExtension_init_unchained(
        uint256 _preSalePrice,
        uint256 _preSaleMaxMintPerWallet
    ) internal onlyInitializing {
        _registerInterface(type(IERC721PreSaleExtension).interfaceId);

        preSalePrice = _preSalePrice;
        preSaleMaxMintPerWallet = _preSaleMaxMintPerWallet;
    }

    /* ADMIN */

    function setPreSalePrice(uint256 newValue) external onlyOwner {
        preSalePrice = newValue;
    }

    function setPreSaleMaxMintPerWallet(uint256 newValue) external onlyOwner {
        preSaleMaxMintPerWallet = newValue;
    }

    function setAllowlistMerkleRoot(bytes32 newRoot) external onlyOwner {
        preSaleAllowlistMerkleRoot = newRoot;
    }

    function togglePreSaleStatus(bool isActive) external onlyOwner {
        preSaleStatus = isActive;
    }

    /* PUBLIC */

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721ACollectionMetadataExtension)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function onPreSaleAllowList(address minter, bytes32[] calldata proof)
        external
        view
        returns (bool)
    {
        return
            MerkleProof.verify(
                proof,
                preSaleAllowlistMerkleRoot,
                _generateMerkleLeaf(minter)
            );
    }

    function mintPreSale(uint256 count, bytes32[] calldata proof)
        external
        payable
        nonReentrant
    {
        require(preSaleStatus, "NOT_ACTIVE");

        address to = _msgSender();

        require(
            MerkleProof.verify(
                proof,
                preSaleAllowlistMerkleRoot,
                _generateMerkleLeaf(to)
            ),
            "WRONG_PROOF"
        );
        require(
            preSaleAllowlistClaimed[to] + count <= preSaleMaxMintPerWallet,
            "PRE_SALE_LIMIT"
        );
        require(preSalePrice * count <= msg.value, "INSUFFICIENT_AMOUNT");

        preSaleAllowlistClaimed[to] += count;

        _mintTo(to, count);
    }

    /* INTERNAL */

    function _generateMerkleLeaf(address account)
        internal
        pure
        returns (bytes32)
    {
        return keccak256(abi.encodePacked(account));
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "erc721a/contracts/ERC721A.sol";

import {IERC721PrefixedMetadataExtension} from "../../ERC721/extensions/ERC721PrefixedMetadataExtension.sol";

/**
 * @dev Extension to allow configuring tokens metadata URI.
 *      In this extension tokens will have a shared token URI prefix,
 *      therefore on tokenURI() token's ID will be appended to the base URI.
 *      It also allows configuring a fallback "placeholder" URI when prefix is not set yet.
 */
abstract contract ERC721APrefixedMetadataExtension is
    IERC721PrefixedMetadataExtension,
    Initializable,
    Ownable,
    ERC165Storage,
    ERC721A
{
    string internal _placeholderURI;
    string internal _tokenURIPrefix;
    string internal _tokenURISuffix;

    bool public tokenURIFrozen;

    function __ERC721APrefixedMetadataExtension_init(
        string memory placeholderURI_,
        string memory tokenURIPrefix_
    ) internal onlyInitializing {
        __ERC721APrefixedMetadataExtension_init_unchained(
            placeholderURI_,
            tokenURIPrefix_
        );
    }

    function __ERC721APrefixedMetadataExtension_init_unchained(
        string memory placeholderURI_,
        string memory tokenURIPrefix_
    ) internal onlyInitializing {
        _placeholderURI = placeholderURI_;
        _tokenURIPrefix = tokenURIPrefix_;
        _tokenURISuffix = ".json";

        _registerInterface(type(IERC721PrefixedMetadataExtension).interfaceId);
        _registerInterface(type(IERC721Metadata).interfaceId);
    }

    /* ADMIN */

    function setPlaceholderURI(string memory newValue) external onlyOwner {
        _placeholderURI = newValue;
    }

    function setTokenURIPrefix(string memory newValue) external onlyOwner {
        require(!tokenURIFrozen, "FROZEN");
        _tokenURIPrefix = newValue;
    }

    function setTokenURISuffix(string memory newValue) external onlyOwner {
        require(!tokenURIFrozen, "FROZEN");
        _tokenURISuffix = newValue;
    }

    function freezeTokenURI() external onlyOwner {
        tokenURIFrozen = true;
    }

    /* PUBLIC */

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721A)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function placeholderURI() public view returns (string memory) {
        return _placeholderURI;
    }

    function tokenURIPrefix() public view returns (string memory) {
        return _tokenURIPrefix;
    }

    function tokenURISuffix() public view returns (string memory) {
        return _tokenURISuffix;
    }

    function tokenURI(uint256 _tokenId)
        public
        view
        virtual
        override(ERC721A, IERC721PrefixedMetadataExtension)
        returns (string memory)
    {
        return
            bytes(_tokenURIPrefix).length > 0
                ? string(
                    abi.encodePacked(
                        _tokenURIPrefix,
                        Strings.toString(_tokenId),
                        _tokenURISuffix
                    )
                )
                : _placeholderURI;
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721AMinterExtension.sol";

import {IERC721PublicSaleExtension} from "../../ERC721/extensions/ERC721PublicSaleExtension.sol";

/**
 * @dev Extension to provide pre-sale and public-sale capabilities for collectors to mint for a specific price.
 */
abstract contract ERC721APublicSaleExtension is
    IERC721PublicSaleExtension,
    Initializable,
    Ownable,
    ERC165Storage,
    ERC721AMinterExtension,
    ReentrancyGuard
{
    uint256 public publicSalePrice;
    uint256 public publicSaleMaxMintPerTx;
    bool public publicSaleStatus;

    function __ERC721APublicSaleExtension_init(
        uint256 _publicSalePrice,
        uint256 _publicSaleMaxMintPerTx
    ) internal onlyInitializing {
        __ERC721APublicSaleExtension_init_unchained(
            _publicSalePrice,
            _publicSaleMaxMintPerTx
        );
    }

    function __ERC721APublicSaleExtension_init_unchained(
        uint256 _publicSalePrice,
        uint256 _publicSaleMaxMintPerTx
    ) internal onlyInitializing {
        _registerInterface(type(IERC721PublicSaleExtension).interfaceId);

        publicSalePrice = _publicSalePrice;
        publicSaleMaxMintPerTx = _publicSaleMaxMintPerTx;
    }

    /* ADMIN */

    function setPublicSalePrice(uint256 newValue) external onlyOwner {
        publicSalePrice = newValue;
    }

    function setPublicSaleMaxMintPerTx(uint256 newValue) external onlyOwner {
        publicSaleMaxMintPerTx = newValue;
    }

    function togglePublicSaleStatus(bool isActive) external onlyOwner {
        publicSaleStatus = isActive;
    }

    /* PUBLIC */

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(ERC165Storage, ERC721ACollectionMetadataExtension)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }

    function mintPublicSale(address to, uint256 count)
        external
        payable
        nonReentrant
    {
        require(publicSaleStatus, "PUBLIC_SALE_NOT_ACTIVE");
        require(count <= publicSaleMaxMintPerTx, "PUBLIC_SALE_LIMIT");
        require(publicSalePrice * count <= msg.value, "INSUFFICIENT_AMOUNT");

        _mintTo(to, count);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";
import "@openzeppelin/contracts/utils/structs/BitMaps.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

import "./ERC721ALockableExtension.sol";

interface IERC721ARoleBasedLockableExtension {
    function hasRoleBasedLockableExtension() external view returns (bool);
}

/**
 * @dev Extension to allow locking NFTs, for use-cases like staking, without leaving holders wallet, using roles.
 */
abstract contract ERC721ARoleBasedLockableExtension is
    IERC721ARoleBasedLockableExtension,
    ERC721ALockableExtension,
    AccessControl
{
    using BitMaps for BitMaps.BitMap;

    bytes32 public constant LOCKER_ROLE = keccak256("LOCKER_ROLE");

    function __ERC721ARoleBasedLockableExtension_init()
        internal
        onlyInitializing
    {
        __ERC721ARoleBasedLockableExtension_init_unchained();
    }

    function __ERC721ARoleBasedLockableExtension_init_unchained()
        internal
        onlyInitializing
    {
        _registerInterface(
            type(IERC721ARoleBasedLockableExtension).interfaceId
        );
    }

    // ADMIN

    /**
     * Locks token(s) to effectively lock them, while keeping in the same wallet.
     * This mechanism prevents them from being transferred, yet still will show correct owner.
     */
    function lock(uint256 tokenId) public virtual nonReentrant {
        require(hasRole(LOCKER_ROLE, msg.sender), "NOT_LOCKER_ROLE");
        _lock(tokenId);
    }

    function lock(uint256[] calldata tokenIds) public virtual nonReentrant {
        require(hasRole(LOCKER_ROLE, msg.sender), "STAKABLE_NOT_LOCKER_ROLE");

        for (uint256 i = 0; i < tokenIds.length; i++) {
            _lock(tokenIds[i]);
        }
    }

    /**
     * Unlocks locked token(s) to be able to transfer.
     */
    function unlock(uint256 tokenId) public virtual nonReentrant {
        require(hasRole(LOCKER_ROLE, msg.sender), "NOT_LOCKER_ROLE");
        _unlock(tokenId);
    }

    function unlock(uint256[] calldata tokenIds) public virtual nonReentrant {
        require(hasRole(LOCKER_ROLE, msg.sender), "STAKABLE_NOT_LOCKER_ROLE");

        for (uint256 i = 0; i < tokenIds.length; i++) {
            _unlock(tokenIds[i]);
        }
    }

    // PUBLIC

    function hasRoleBasedLockableExtension()
        public
        view
        virtual
        returns (bool)
    {
        return true;
    }

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(AccessControl, ERC721ALockableExtension)
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "./ERC721AMinterExtension.sol";

import {IERC721RoleBasedMintExtension} from "../../ERC721/extensions/ERC721RoleBasedMintExtension.sol";

/**
 * @dev Extension to allow holders of a OpenZepplin-based role to mint directly.
 */
abstract contract ERC721ARoleBasedMintExtension is
    IERC721RoleBasedMintExtension,
    ERC165Storage,
    ERC721AMinterExtension,
    AccessControl
{
    bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");

    function __ERC721ARoleBasedMintExtension_init(address minter)
        internal
        onlyInitializing
    {
        __ERC721ARoleBasedMintExtension_init_unchained(minter);
    }

    function __ERC721ARoleBasedMintExtension_init_unchained(address minter)
        internal
        onlyInitializing
    {
        _registerInterface(type(IERC721RoleBasedMintExtension).interfaceId);

        _setupRole(MINTER_ROLE, minter);
    }

    /* ADMIN */

    function mintByRole(address to, uint256 count) external {
        require(hasRole(MINTER_ROLE, _msgSender()), "NOT_MINTER_ROLE");

        _mintTo(to, count);
    }

    /* PUBLIC */

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(
            ERC165Storage,
            AccessControl,
            ERC721ACollectionMetadataExtension
        )
        returns (bool)
    {
        return ERC165Storage.supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity 0.8.9;

import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";

import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";

enum WithdrawMode {
    OWNER,
    RECIPIENT,
    ANYONE,
    NOBODY
}

interface IWithdrawExtension {
    function setWithdrawRecipient(address _withdrawRecipient) external;

    function lockWithdrawRecipient() external;

    function revokeWithdrawPower() external;

    function setWithdrawMode(WithdrawMode _withdrawMode) external;

    function lockWithdrawMode() external;

    function withdraw(
        address[] calldata claimTokens,
        uint256[] calldata amounts
    ) external;
}

abstract contract WithdrawExtension is
    IWithdrawExtension,
    Initializable,
    Ownable,
    ERC165Storage
{
    using Address for address;
    using Address for address payable;

    event WithdrawPowerRevoked();
    event Withdrawn(address[] claimTokens, uint256[] amounts);

    address public withdrawRecipient;
    bool public withdrawRecipientLocked;

    bool public withdrawPowerRevoked;

    WithdrawMode public withdrawMode;
    bool public withdrawModeLocked;

    /* INTERNAL */

    function __WithdrawExtension_init(
        address _withdrawRecipient,
        WithdrawMode _withdrawMode
    ) internal onlyInitializing {
        __WithdrawExtension_init_unchained(_withdrawRecipient, _withdrawMode);
    }

    function __WithdrawExtension_init_unchained(
        address _withdrawRecipient,
        WithdrawMode _withdrawMode
    ) internal onlyInitializing {
        _registerInterface(type(IWithdrawExtension).interfaceId);

        withdrawRecipient = _withdrawRecipient;
        withdrawMode = _withdrawMode;
    }

    /* ADMIN */

    function setWithdrawRecipient(address _withdrawRecipient)
        external
        onlyOwner
    {
        require(!withdrawRecipientLocked, "LOCKED");
        withdrawRecipient = _withdrawRecipient;
    }

    function lockWithdrawRecipient() external onlyOwner {
        require(!withdrawRecipientLocked, "LOCKED");
        withdrawRecipientLocked = true;
    }

    function setWithdrawMode(WithdrawMode _withdrawMode) external onlyOwner {
        require(!withdrawModeLocked, "LOCKED");
        withdrawMode = _withdrawMode;
    }

    function lockWithdrawMode() external onlyOwner {
        require(!withdrawModeLocked, "OCKED");
        withdrawModeLocked = true;
    }

    /* PUBLIC */

    function withdraw(
        address[] calldata claimTokens,
        uint256[] calldata amounts
    ) external {
        /**
         * We are using msg.sender for smaller attack surface when evaluating
         * the sender of the function call. If in future we want to handle "withdraw"
         * functionality via meta transactions, we should consider using `_msgSender`
         */
        _assertWithdrawAccess(msg.sender);

        require(withdrawRecipient != address(0), "WITHDRAW/NO_RECIPIENT");
        require(!withdrawPowerRevoked, "WITHDRAW/EMERGENCY_POWER_REVOKED");

        for (uint256 i = 0; i < claimTokens.length; i++) {
            if (claimTokens[i] == address(0)) {
                payable(withdrawRecipient).sendValue(amounts[i]);
            } else {
                IERC20(claimTokens[i]).transfer(withdrawRecipient, amounts[i]);
            }
        }

        emit Withdrawn(claimTokens, amounts);
    }

    function revokeWithdrawPower() external onlyOwner {
        withdrawPowerRevoked = true;
        emit WithdrawPowerRevoked();
    }

    /* INTERNAL */

    function _assertWithdrawAccess(address account) internal view {
        if (withdrawMode == WithdrawMode.NOBODY) {
            revert("WITHDRAW/LOCKED");
        } else if (withdrawMode == WithdrawMode.ANYONE) {
            return;
        } else if (withdrawMode == WithdrawMode.RECIPIENT) {
            require(withdrawRecipient == account, "WITHDRAW/ONLY_RECIPIENT");
        } else if (withdrawMode == WithdrawMode.OWNER) {
            require(owner() == account, "WITHDRAW/ONLY_OWNER");
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

/**
 * @dev Context variant with ERC2771 support.
 */
abstract contract ERC2771ContextOwnable is Initializable, Context, Ownable {
    address public _trustedForwarder;

    function __ERC2771ContextOwnable_init(address trustedForwarder)
        internal
        onlyInitializing
    {
        __ERC2771ContextOwnable_init_unchained(trustedForwarder);
    }

    function __ERC2771ContextOwnable_init_unchained(address trustedForwarder)
        internal
        onlyInitializing
    {
        _trustedForwarder = trustedForwarder;
    }

    function setTrustedForwarder(address trustedForwarder) public onlyOwner {
        _trustedForwarder = trustedForwarder;
    }

    function isTrustedForwarder(address forwarder)
        public
        view
        virtual
        returns (bool)
    {
        return forwarder == _trustedForwarder;
    }

    function _msgSender()
        internal
        view
        virtual
        override
        returns (address sender)
    {
        if (isTrustedForwarder(msg.sender)) {
            // The assembly code is more direct than the Solidity version using `abi.decode`.
            assembly {
                sender := shr(96, calldataload(sub(calldatasize(), 20)))
            }
        } else {
            return super._msgSender();
        }
    }

    function _msgData()
        internal
        view
        virtual
        override
        returns (bytes calldata)
    {
        if (isTrustedForwarder(msg.sender)) {
            return msg.data[:msg.data.length - 20];
        } else {
            return super._msgData();
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;
pragma abicoder v2;

import "./LibPart.sol";

interface IRoyalties {
    function getRaribleV2Royalties(uint256 id)
        external
        view
        returns (LibPart.Part[] memory);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

library LibPart {
    bytes32 public constant TYPE_HASH =
        keccak256("Part(address account,uint96 value)");

    struct Part {
        address payable account;
        uint96 value;
    }

    function hash(Part memory part) internal pure returns (bytes32) {
        return keccak256(abi.encode(TYPE_HASH, part.account, part.value));
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.9;

library LibRoyaltiesV2 {
    /*
     * bytes4(keccak256('getRaribleV2Royalties(uint256)')) == 0xcad96cca
     */
    bytes4 constant _INTERFACE_ID_ROYALTIES = 0xcad96cca;
}

// SPDX-License-Identifier: MIT
// ERC721A Contracts v4.1.0
// Creator: Chiru Labs

pragma solidity ^0.8.4;

import './IERC721A.sol';

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

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard,
 * including the Metadata extension. Built to optimize for lower gas during batch mints.
 *
 * Assumes serials are sequentially minted starting at `_startTokenId()`
 * (defaults to 0, e.g. 0, 1, 2, 3..).
 *
 * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
 *
 * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).
 */
contract ERC721A is IERC721A {
    // Mask of an entry in packed address data.
    uint256 private constant BITMASK_ADDRESS_DATA_ENTRY = (1 << 64) - 1;

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

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

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

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

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

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

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

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

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

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

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

    // The maximum `quantity` that can be minted with `_mintERC2309`.
    // This limit is to prevent overflows on the address data entries.
    // For a limit of 5000, a total of 3.689e15 calls to `_mintERC2309`
    // is required to cause an overflow, which is unrealistic.
    uint256 private constant MAX_MINT_ERC2309_QUANTITY_LIMIT = 5000;

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

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

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        // The interface IDs are constants representing the first 4 bytes of the XOR of
        // all function selectors in the interface. See: https://eips.ethereum.org/EIPS/eip-165
        // e.g. `bytes4(i.functionA.selector ^ i.functionB.selector ^ ...)`
        return
            interfaceId == 0x01ffc9a7 || // ERC165 interface ID for ERC165.
            interfaceId == 0x80ac58cd || // ERC165 interface ID for ERC721.
            interfaceId == 0x5b5e139f; // ERC165 interface ID for ERC721Metadata.
    }

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

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

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

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

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

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

        unchecked {
            if (_startTokenId() <= curr)
                if (curr < _currentIndex) {
                    uint256 packed = _packedOwnerships[curr];
                    // If not burned.
                    if (packed & BITMASK_BURNED == 0) {
                        // Invariant:
                        // There will always be an ownership that has an address and is not burned
                        // before an ownership that does not have an address and is not burned.
                        // Hence, curr will not underflow.
                        //
                        // We can directly compare the packed value.
                        // If the address is zero, packed is zero.
                        while (packed == 0) {
                            packed = _packedOwnerships[--curr];
                        }
                        return packed;
                    }
                }
        }
        revert OwnerQueryForNonexistentToken();
    }

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

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

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

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

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

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view override returns (address) {
        return address(uint160(_packedOwnershipOf(tokenId)));
    }

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

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

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

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

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

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

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

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

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

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

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        if (operator == _msgSenderERC721A()) revert ApproveToCaller();

        _operatorApprovals[_msgSenderERC721A()][operator] = approved;
        emit ApprovalForAll(_msgSenderERC721A(), 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-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 {
        transferFrom(from, to, tokenId);
        if (to.code.length != 0)
            if (!_checkContractOnERC721Received(from, to, tokenId, _data)) {
                revert TransferToNonERC721ReceiverImplementer();
            }
    }

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

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

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

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

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

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

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

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

            uint256 tokenId = startTokenId;
            uint256 end = startTokenId + quantity;
            do {
                emit Transfer(address(0), to, tokenId++);
            } while (tokenId < end);

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

    /**
     * @dev Mints `quantity` tokens and transfers them to `to`.
     *
     * This function is intended for efficient minting only during contract creation.
     *
     * It emits only one {ConsecutiveTransfer} as defined in
     * [ERC2309](https://eips.ethereum.org/EIPS/eip-2309),
     * instead of a sequence of {Transfer} event(s).
     *
     * Calling this function outside of contract creation WILL make your contract
     * non-compliant with the ERC721 standard.
     * For full ERC721 compliance, substituting ERC721 {Transfer} event(s) with the ERC2309
     * {ConsecutiveTransfer} event is only permissible during contract creation.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `quantity` must be greater than 0.
     *
     * Emits a {ConsecutiveTransfer} event.
     */
    function _mintERC2309(address to, uint256 quantity) internal {
        uint256 startTokenId = _currentIndex;
        if (to == address(0)) revert MintToZeroAddress();
        if (quantity == 0) revert MintZeroQuantity();
        if (quantity > MAX_MINT_ERC2309_QUANTITY_LIMIT) revert MintERC2309QuantityExceedsLimit();

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

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

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

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

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

    /**
     * @dev Returns the storage slot and value for the approved address of `tokenId`.
     */
    function _getApprovedAddress(uint256 tokenId)
        private
        view
        returns (uint256 approvedAddressSlot, address approvedAddress)
    {
        mapping(uint256 => address) storage tokenApprovalsPtr = _tokenApprovals;
        // The following is equivalent to `approvedAddress = _tokenApprovals[tokenId]`.
        assembly {
            // Compute the slot.
            mstore(0x00, tokenId)
            mstore(0x20, tokenApprovalsPtr.slot)
            approvedAddressSlot := keccak256(0x00, 0x40)
            // Load the slot's value from storage.
            approvedAddress := sload(approvedAddressSlot)
        }
    }

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

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);

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

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

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

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

        _beforeTokenTransfers(from, to, tokenId, 1);

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

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

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

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

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

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

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

        address from = address(uint160(prevOwnershipPacked));

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function _toString(uint256 value) internal pure returns (string memory ptr) {
        assembly {
            // The maximum value of a uint256 contains 78 digits (1 byte per digit),
            // but we allocate 128 bytes to keep the free memory pointer 32-byte word aliged.
            // We will need 1 32-byte word to store the length,
            // and 3 32-byte words to store a maximum of 78 digits. Total: 32 + 3 * 32 = 128.
            ptr := add(mload(0x40), 128)
            // Update the free memory pointer to allocate.
            mstore(0x40, ptr)

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

            // We write the string from the rightmost digit to the leftmost digit.
            // The following is essentially a do-while loop that also handles the zero case.
            // Costs a bit more than early returning for the zero case,
            // but cheaper in terms of deployment and overall runtime costs.
            for {
                // Initialize and perform the first pass without check.
                let temp := value
                // Move the pointer 1 byte leftwards to point to an empty character slot.
                ptr := sub(ptr, 1)
                // Write the character to the pointer. 48 is the ASCII index of '0'.
                mstore8(ptr, add(48, mod(temp, 10)))
                temp := div(temp, 10)
            } temp {
                // Keep dividing `temp` until zero.
                temp := div(temp, 10)
            } {
                // Body of the for loop.
                ptr := sub(ptr, 1)
                mstore8(ptr, add(48, mod(temp, 10)))
            }

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

// SPDX-License-Identifier: MIT
// ERC721A Contracts v4.1.0
// Creator: Chiru Labs

pragma solidity ^0.8.4;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    // ==============================
    //            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);

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

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

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

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

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

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

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * 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 be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Emitted when tokens in `fromTokenId` to `toTokenId` (inclusive) is transferred from `from` to `to`,
     * as defined in the ERC2309 standard. See `_mintERC2309` for more details.
     */
    event ConsecutiveTransfer(uint256 indexed fromTokenId, uint256 toTokenId, address indexed from, address indexed to);
}

{
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 6
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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-----Decoded View---------------
Arg [0] : config (tuple): System.Collections.Generic.List`1[Nethereum.ABI.FunctionEncoding.ParameterOutput]

-----Encoded View---------------
25 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000020
Arg [1] : 00000000000000000000000000000000000000000000000000000000000001c0
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000200
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000240
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000280
Arg [5] : 00000000000000000000000000000000000000000000000000000000000002c0
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [8] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [9] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [10] : 000000000000000000000000000000000000000000000000000000000000000a
Arg [11] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [12] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [13] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [14] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [15] : 000000000000000000000000000000000000000000000000000000000000000a
Arg [16] : 436f6c6c656374696f6e00000000000000000000000000000000000000000000
Arg [17] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [18] : 434f4c0000000000000000000000000000000000000000000000000000000000
Arg [19] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [20] : 697066733a2f2f636f6e74726163745552490000000000000000000000000000
Arg [21] : 0000000000000000000000000000000000000000000000000000000000000015
Arg [22] : 697066733a2f2f706c616365686f6c6465725552490000000000000000000000
Arg [23] : 0000000000000000000000000000000000000000000000000000000000000016
Arg [24] : 697066733a2f2f746f6b656e5552495072656669782f00000000000000000000