// File: @openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol



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

pragma solidity ^0.8.0;

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

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

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

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

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }

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

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

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

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

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

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

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

// File: @openzeppelin/contracts-upgradeable/interfaces/draft-IERC1822Upgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822ProxiableUpgradeable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}

// File: @openzeppelin/contracts-upgradeable/proxy/beacon/IBeaconUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeaconUpgradeable {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

// File: @openzeppelin/contracts-upgradeable/proxy/ERC1967/ERC1967UpgradeUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeaconUpgradeable.sol";
import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/StorageSlotUpgradeable.sol";
import "../utils/Initializable.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967UpgradeUpgradeable is Initializable {
    function __ERC1967Upgrade_init() internal onlyInitializing {
    }

    function __ERC1967Upgrade_init_unchained() internal onlyInitializing {
    }
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            _functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822ProxiableUpgradeable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Emitted when the beacon is upgraded.
     */
    event BeaconUpgraded(address indexed beacon);

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(
        address newBeacon,
        bytes memory data,
        bool forceCall
    ) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            _functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
        }
    }

    /**
     * @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) private returns (bytes memory) {
        require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed");
    }

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

// File: @openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol



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

pragma solidity ^0.8.2;

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

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

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

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

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

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

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

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

// File: @openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.0;

import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../ERC1967/ERC1967UpgradeUpgradeable.sol";
import "./Initializable.sol";

/**
 * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
 * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
 *
 * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
 * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
 * `UUPSUpgradeable` with a custom implementation of upgrades.
 *
 * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
 *
 * _Available since v4.1._
 */
abstract contract UUPSUpgradeable is Initializable, IERC1822ProxiableUpgradeable, ERC1967UpgradeUpgradeable {
    function __UUPSUpgradeable_init() internal onlyInitializing {
    }

    function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
    }
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
    address private immutable __self = address(this);

    /**
     * @dev Check that the execution is being performed through a delegatecall call and that the execution context is
     * a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
     * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
     * function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
     * fail.
     */
    modifier onlyProxy() {
        require(address(this) != __self, "Function must be called through delegatecall");
        require(_getImplementation() == __self, "Function must be called through active proxy");
        _;
    }

    /**
     * @dev Check that the execution is not being performed through a delegate call. This allows a function to be
     * callable on the implementing contract but not through proxies.
     */
    modifier notDelegated() {
        require(address(this) == __self, "UUPSUpgradeable: must not be called through delegatecall");
        _;
    }

    /**
     * @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the
     * implementation. It is used to validate that the this implementation remains valid after an upgrade.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
     */
    function proxiableUUID() external view virtual override notDelegated returns (bytes32) {
        return _IMPLEMENTATION_SLOT;
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     */
    function upgradeTo(address newImplementation) external virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, new bytes(0), false);
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
     * encoded in `data`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) external payable virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, data, true);
    }

    /**
     * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
     * {upgradeTo} and {upgradeToAndCall}.
     *
     * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
     *
     * ```solidity
     * function _authorizeUpgrade(address) internal override onlyOwner {}
     * ```
     */
    function _authorizeUpgrade(address newImplementation) internal virtual;

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

// File: @openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;

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

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

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

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

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

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

// File: @openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol



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

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

// File: @openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol



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

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

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

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

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

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

// File: @openzeppelin/contracts-upgradeable/utils/introspection/ERC165CheckerUpgradeable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.2) (utils/introspection/ERC165Checker.sol)

pragma solidity ^0.8.0;

import "./IERC165Upgradeable.sol";

/**
 * @dev Library used to query support of an interface declared via {IERC165}.
 *
 * Note that these functions return the actual result of the query: they do not
 * `revert` if an interface is not supported. It is up to the caller to decide
 * what to do in these cases.
 */
library ERC165CheckerUpgradeable {
    // As per the EIP-165 spec, no interface should ever match 0xffffffff
    bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;

    /**
     * @dev Returns true if `account` supports the {IERC165} interface,
     */
    function supportsERC165(address account) internal view returns (bool) {
        // Any contract that implements ERC165 must explicitly indicate support of
        // InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid
        return
            _supportsERC165Interface(account, type(IERC165Upgradeable).interfaceId) &&
            !_supportsERC165Interface(account, _INTERFACE_ID_INVALID);
    }

    /**
     * @dev Returns true if `account` supports the interface defined by
     * `interfaceId`. Support for {IERC165} itself is queried automatically.
     *
     * See {IERC165-supportsInterface}.
     */
    function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) {
        // query support of both ERC165 as per the spec and support of _interfaceId
        return supportsERC165(account) && _supportsERC165Interface(account, interfaceId);
    }

    /**
     * @dev Returns a boolean array where each value corresponds to the
     * interfaces passed in and whether they're supported or not. This allows
     * you to batch check interfaces for a contract where your expectation
     * is that some interfaces may not be supported.
     *
     * See {IERC165-supportsInterface}.
     *
     * _Available since v3.4._
     */
    function getSupportedInterfaces(address account, bytes4[] memory interfaceIds)
        internal
        view
        returns (bool[] memory)
    {
        // an array of booleans corresponding to interfaceIds and whether they're supported or not
        bool[] memory interfaceIdsSupported = new bool[](interfaceIds.length);

        // query support of ERC165 itself
        if (supportsERC165(account)) {
            // query support of each interface in interfaceIds
            for (uint256 i = 0; i < interfaceIds.length; i++) {
                interfaceIdsSupported[i] = _supportsERC165Interface(account, interfaceIds[i]);
            }
        }

        return interfaceIdsSupported;
    }

    /**
     * @dev Returns true if `account` supports all the interfaces defined in
     * `interfaceIds`. Support for {IERC165} itself is queried automatically.
     *
     * Batch-querying can lead to gas savings by skipping repeated checks for
     * {IERC165} support.
     *
     * See {IERC165-supportsInterface}.
     */
    function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) {
        // query support of ERC165 itself
        if (!supportsERC165(account)) {
            return false;
        }

        // query support of each interface in _interfaceIds
        for (uint256 i = 0; i < interfaceIds.length; i++) {
            if (!_supportsERC165Interface(account, interfaceIds[i])) {
                return false;
            }
        }

        // all interfaces supported
        return true;
    }

    /**
     * @notice Query if a contract implements an interface, does not check ERC165 support
     * @param account The address of the contract to query for support of an interface
     * @param interfaceId The interface identifier, as specified in ERC-165
     * @return true if the contract at account indicates support of the interface with
     * identifier interfaceId, false otherwise
     * @dev Assumes that account contains a contract that supports ERC165, otherwise
     * the behavior of this method is undefined. This precondition can be checked
     * with {supportsERC165}.
     * Interface identification is specified in ERC-165.
     */
    function _supportsERC165Interface(address account, bytes4 interfaceId) private view returns (bool) {
        // prepare call
        bytes memory encodedParams = abi.encodeWithSelector(IERC165Upgradeable.supportsInterface.selector, interfaceId);

        // perform static call
        bool success;
        uint256 returnSize;
        uint256 returnValue;
        assembly {
            success := staticcall(30000, account, add(encodedParams, 0x20), mload(encodedParams), 0x00, 0x20)
            returnSize := returndatasize()
            returnValue := mload(0x00)
        }

        return success && returnSize >= 0x20 && returnValue > 0;
    }
}

// File: @openzeppelin/contracts-upgradeable/utils/introspection/IERC165Upgradeable.sol



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

pragma solidity ^0.8.0;

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

// File: @openzeppelin/contracts-upgradeable/utils/math/MathUpgradeable.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`.
        // We also know that `k`, the position of the most significant bit, is such that `msb(a) = 2**k`.
        // This gives `2**k < a <= 2**(k+1)` → `2**(k/2) <= sqrt(a) < 2 ** (k/2+1)`.
        // Using an algorithm similar to the msb conmputation, we are able to compute `result = 2**(k/2)` which is a
        // good first aproximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1;
        uint256 x = a;
        if (x >> 128 > 0) {
            x >>= 128;
            result <<= 64;
        }
        if (x >> 64 > 0) {
            x >>= 64;
            result <<= 32;
        }
        if (x >> 32 > 0) {
            x >>= 32;
            result <<= 16;
        }
        if (x >> 16 > 0) {
            x >>= 16;
            result <<= 8;
        }
        if (x >> 8 > 0) {
            x >>= 8;
            result <<= 4;
        }
        if (x >> 4 > 0) {
            x >>= 4;
            result <<= 2;
        }
        if (x >> 2 > 0) {
            result <<= 1;
        }

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

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

// File: @openzeppelin/contracts-upgradeable/utils/StorageSlotUpgradeable.sol



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

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlotUpgradeable {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
}

// File: @openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

// File: @openzeppelin/contracts/utils/Strings.sol



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

pragma solidity ^0.8.0;

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

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

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

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

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

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

// File: @tableland/evm/contracts/ITablelandController.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

/**
 * @dev Interface of a TablelandController compliant contract.
 *
 * This interface can be implemented to enabled advanced access control for a table.
 * Call {ITablelandTables-setController} with the address of your implementation.
 *
 * See {test/TestTablelandController} for an example of token-gating table write-access.
 */
interface ITablelandController {
    /**
     * @dev Object defining how a table can be accessed.
     */
    struct Policy {
        // Whether or not the table should allow SQL INSERT statements.
        bool allowInsert;
        // Whether or not the table should allow SQL UPDATE statements.
        bool allowUpdate;
        // Whether or not the table should allow SQL DELETE statements.
        bool allowDelete;
        // A conditional clause used with SQL UPDATE and DELETE statements.
        // For example, a value of "foo > 0" will concatenate all SQL UPDATE
        // and/or DELETE statements with "WHERE foo > 0".
        // This can be useful for limiting how a table can be modified.
        // Use {Policies-joinClauses} to include more than one condition.
        string whereClause;
        // A conditional clause used with SQL INSERT statements.
        // For example, a value of "foo > 0" will concatenate all SQL INSERT
        // statements with a check on the incoming data, i.e., "CHECK (foo > 0)".
        // This can be useful for limiting how table data ban be added.
        // Use {Policies-joinClauses} to include more than one condition.
        string withCheck;
        // A list of SQL column names that can be updated.
        string[] updatableColumns;
    }

    /**
     * @dev Returns a {Policy} struct defining how a table can be accessed by `caller`.
     */
    function getPolicy(address caller) external payable returns (Policy memory);
}

// File: @tableland/evm/contracts/ITablelandTables.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "./ITablelandController.sol";

/**
 * @dev Interface of a TablelandTables compliant contract.
 */
interface ITablelandTables {
    /**
     * The caller is not authorized.
     */
    error Unauthorized();

    /**
     * RunSQL was called with a query length greater than maximum allowed.
     */
    error MaxQuerySizeExceeded(uint256 querySize, uint256 maxQuerySize);

    /**
     * @dev Emitted when `owner` creates a new table.
     *
     * owner - the to-be owner of the table
     * tableId - the table id of the new table
     * statement - the SQL statement used to create the table
     */
    event CreateTable(address owner, uint256 tableId, string statement);

    /**
     * @dev Emitted when a table is transferred from `from` to `to`.
     *
     * Not emmitted when a table is created.
     * Also emitted after a table has been burned.
     *
     * from - the address that transfered the table
     * to - the address that received the table
     * tableId - the table id that was transferred
     */
    event TransferTable(address from, address to, uint256 tableId);

    /**
     * @dev Emitted when `caller` runs a SQL statement.
     *
     * caller - the address that is running the SQL statement
     * isOwner - whether or not the caller is the table owner
     * tableId - the id of the target table
     * statement - the SQL statement to run
     * policy - an object describing how `caller` can interact with the table (see {ITablelandController.Policy})
     */
    event RunSQL(
        address caller,
        bool isOwner,
        uint256 tableId,
        string statement,
        ITablelandController.Policy policy
    );

    /**
     * @dev Emitted when a table's controller is set.
     *
     * tableId - the id of the target table
     * controller - the address of the controller (EOA or contract)
     */
    event SetController(uint256 tableId, address controller);

    /**
     * @dev Creates a new table owned by `owner` using `statement` and returns its `tableId`.
     *
     * owner - the to-be owner of the new table
     * statement - the SQL statement used to create the table
     *
     * Requirements:
     *
     * - contract must be unpaused
     */
    function createTable(
        address owner,
        string memory statement
    ) external payable returns (uint256);

    /**
     * @dev Runs a SQL statement for `caller` using `statement`.
     *
     * caller - the address that is running the SQL statement
     * tableId - the id of the target table
     * statement - the SQL statement to run
     *
     * Requirements:
     *
     * - contract must be unpaused
     * - `msg.sender` must be `caller` or contract owner
     * - `tableId` must exist
     * - `caller` must be authorized by the table controller
     * - `statement` must be less than or equal to 35000 bytes
     */
    function runSQL(
        address caller,
        uint256 tableId,
        string memory statement
    ) external payable;

    /**
     * @dev Sets the controller for a table. Controller can be an EOA or contract address.
     *
     * When a table is created, it's controller is set to the zero address, which means that the
     * contract will not enforce write access control. In this situation, validators will not accept
     * transactions from non-owners unless explicitly granted access with "GRANT" SQL statements.
     *
     * When a controller address is set for a table, validators assume write access control is
     * handled at the contract level, and will accept all transactions.
     *
     * You can unset a controller address for a table by setting it back to the zero address.
     * This will cause validators to revert back to honoring owner and GRANT bases write access control.
     *
     * caller - the address that is setting the controller
     * tableId - the id of the target table
     * controller - the address of the controller (EOA or contract)
     *
     * Requirements:
     *
     * - contract must be unpaused
     * - `msg.sender` must be `caller` or contract owner and owner of `tableId`
     * - `tableId` must exist
     * - `tableId` controller must not be locked
     */
    function setController(
        address caller,
        uint256 tableId,
        address controller
    ) external;

    /**
     * @dev Returns the controller for a table.
     *
     * tableId - the id of the target table
     */
    function getController(uint256 tableId) external returns (address);

    /**
     * @dev Locks the controller for a table _forever_. Controller can be an EOA or contract address.
     *
     * Although not very useful, it is possible to lock a table controller that is set to the zero address.
     *
     * caller - the address that is locking the controller
     * tableId - the id of the target table
     *
     * Requirements:
     *
     * - contract must be unpaused
     * - `msg.sender` must be `caller` or contract owner and owner of `tableId`
     * - `tableId` must exist
     * - `tableId` controller must not be locked
     */
    function lockController(address caller, uint256 tableId) external;

    /**
     * @dev Sets the contract base URI.
     *
     * baseURI - the new base URI
     *
     * Requirements:
     *
     * - `msg.sender` must be contract owner
     */
    function setBaseURI(string memory baseURI) external;

    /**
     * @dev Pauses the contract.
     *
     * Requirements:
     *
     * - `msg.sender` must be contract owner
     * - contract must be unpaused
     */
    function pause() external;

    /**
     * @dev Unpauses the contract.
     *
     * Requirements:
     *
     * - `msg.sender` must be contract owner
     * - contract must be paused
     */
    function unpause() external;
}

// File: @tableland/evm/contracts/utils/SQLHelpers.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/utils/Strings.sol";

/**
 * @dev Library of helpers for generating SQL statements from common parameters.
 */
library SQLHelpers {
    /**
     * @dev Generates a properly formatted table name from a prefix and table id.
     *
     * prefix - the user generated table prefix as a string
     * tableId - the Tableland generated tableId as a uint256
     *
     * Requirements:
     *
     * - block.chainid must refer to a supported chain.
     */
    function toNameFromId(
        string memory prefix,
        uint256 tableId
    ) internal view returns (string memory) {
        return
            string(
                abi.encodePacked(
                    prefix,
                    "_",
                    Strings.toString(block.chainid),
                    "_",
                    Strings.toString(tableId)
                )
            );
    }

    /**
     * @dev Generates a CREATE statement based on a desired schema and table prefix.
     *
     * schema - a comma seperated string indicating the desired prefix. Example: "int id, text name"
     * prefix - the user generated table prefix as a string
     *
     * Requirements:
     *
     * - block.chainid must refer to a supported chain.
     */
    function toCreateFromSchema(
        string memory schema,
        string memory prefix
    ) internal view returns (string memory) {
        return
            string(
                abi.encodePacked(
                    "CREATE TABLE ",
                    prefix,
                    "_",
                    Strings.toString(block.chainid),
                    "(",
                    schema,
                    ")"
                )
            );
    }

    /**
     * @dev Generates an INSERT statement based on table prefix, tableId, columns, and values.
     *
     * prefix - the user generated table prefix as a string.
     * tableId - the Tableland generated tableId as a uint256.
     * columns - a string encoded ordered list of columns that will be updated. Example: "name, age".
     * values - a string encoded ordered list of values that will be inserted wrapped in parentheses. Example: "'jerry', 24". Values order must match column order.
     *
     * Requirements:
     *
     * - block.chainid must refer to a supported chain.
     */
    function toInsert(
        string memory prefix,
        uint256 tableId,
        string memory columns,
        string memory values
    ) internal view returns (string memory) {
        string memory name = toNameFromId(prefix, tableId);
        return
            string(
                abi.encodePacked(
                    "INSERT INTO ",
                    name,
                    "(",
                    columns,
                    ")VALUES(",
                    values,
                    ")"
                )
            );
    }

    /**
     * @dev Generates an INSERT statement based on table prefix, tableId, columns, and values.
     *
     * prefix - the user generated table prefix as a string.
     * tableId - the Tableland generated tableId as a uint256.
     * columns - a string encoded ordered list of columns that will be updated. Example: "name, age".
     * values - an array where each item is a string encoded ordered list of values.
     *
     * Requirements:
     *
     * - block.chainid must refer to a supported chain.
     */
    function toBatchInsert(
        string memory prefix,
        uint256 tableId,
        string memory columns,
        string[] memory values
    ) internal view returns (string memory) {
        string memory name = toNameFromId(prefix, tableId);
        string memory insert = string(
            abi.encodePacked("INSERT INTO ", name, "(", columns, ")VALUES")
        );
        for (uint256 i = 0; i < values.length; i++) {
            if (i == 0) {
                insert = string(abi.encodePacked(insert, "(", values[i], ")"));
            } else {
                insert = string(abi.encodePacked(insert, ",(", values[i], ")"));
            }
        }
        return insert;
    }

    /**
     * @dev Generates an Update statement based on table prefix, tableId, setters, and filters.
     *
     * prefix - the user generated table prefix as a string
     * tableId - the Tableland generated tableId as a uint256
     * setters - a string encoded set of updates. Example: "name='tom', age=26"
     * filters - a string encoded list of filters or "" for no filters. Example: "id<2 and name!='jerry'"
     *
     * Requirements:
     *
     * - block.chainid must refer to a supported chain.
     */
    function toUpdate(
        string memory prefix,
        uint256 tableId,
        string memory setters,
        string memory filters
    ) internal view returns (string memory) {
        string memory name = toNameFromId(prefix, tableId);
        string memory filter = "";
        if (bytes(filters).length > 0) {
            filter = string(abi.encodePacked(" WHERE ", filters));
        }
        return
            string(abi.encodePacked("UPDATE ", name, " SET ", setters, filter));
    }

    /**
     * @dev Generates a Delete statement based on table prefix, tableId, and filters.
     *
     * prefix - the user generated table prefix as a string.
     * tableId - the Tableland generated tableId as a uint256.
     * filters - a string encoded list of filters. Example: "id<2 and name!='jerry'".
     *
     * Requirements:
     *
     * - block.chainid must refer to a supported chain.
     */
    function toDelete(
        string memory prefix,
        uint256 tableId,
        string memory filters
    ) internal view returns (string memory) {
        string memory name = toNameFromId(prefix, tableId);
        return
            string(abi.encodePacked("DELETE FROM ", name, " WHERE ", filters));
    }

    /**
     * @dev Add single quotes around a string value
     *
     * input - any input value.
     *
     */
    function quote(string memory input) internal pure returns (string memory) {
        return string(abi.encodePacked("'", input, "'"));
    }
}

// File: @tableland/evm/contracts/utils/TablelandDeployments.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "../ITablelandTables.sol";

/**
 * @dev Helper library for getting an instance of ITablelandTables for the currently executing EVM chain.
 */
library TablelandDeployments {
    /**
     * Current chain does not have a TablelandTables deployment.
     */
    error ChainNotSupported(uint256 chainid);

    // TablelandTables address on Ethereum.
    address internal constant MAINNET =
        0x012969f7e3439a9B04025b5a049EB9BAD82A8C12;
    // TablelandTables address on Optimism.
    address internal constant OPTIMISTIC_ETHEREUM =
        0xfad44BF5B843dE943a09D4f3E84949A11d3aa3e6;
    // TablelandTables address on Polygon.
    address internal constant POLYGON =
        0x5c4e6A9e5C1e1BF445A062006faF19EA6c49aFeA;

    // TablelandTables address on Ethereum Goerli.
    address internal constant GOERLI =
        0xDA8EA22d092307874f30A1F277D1388dca0BA97a;
    // TablelandTables address on Optimism Goerli.
    address internal constant OPTIMISTIC_GOERLI =
        0xC72E8a7Be04f2469f8C2dB3F1BdF69A7D516aBbA;
    // TablelandTables address on Arbitrum Goerli.
    address internal constant ARBITRUM_GOERLI =
        0x033f69e8d119205089Ab15D340F5b797732f646b;
    // TablelandTables address on Polygon Mumbai.
    address internal constant POLYGON_MUMBAI =
        0x4b48841d4b32C4650E4ABc117A03FE8B51f38F68;

    // TablelandTables address on for use with https://github.com/tablelandnetwork/local-tableland.
    address internal constant LOCAL_TABLELAND =
        0xe7f1725E7734CE288F8367e1Bb143E90bb3F0512;

    /**
     * @dev Returns an interface to Tableland for the currently executing EVM chain.
     *
     * The selection order is meant to reduce gas on more expensive chains.
     *
     * Requirements:
     *
     * - block.chainid must refer to a supported chain.
     */
    function get() internal view returns (ITablelandTables) {
        if (block.chainid == 1) {
            return ITablelandTables(MAINNET);
        } else if (block.chainid == 10) {
            return ITablelandTables(OPTIMISTIC_ETHEREUM);
        } else if (block.chainid == 137) {
            return ITablelandTables(POLYGON);
        } else if (block.chainid == 5) {
            return ITablelandTables(GOERLI);
        } else if (block.chainid == 420) {
            return ITablelandTables(OPTIMISTIC_GOERLI);
        } else if (block.chainid == 421613) {
            return ITablelandTables(ARBITRUM_GOERLI);
        } else if (block.chainid == 80001) {
            return ITablelandTables(POLYGON_MUMBAI);
        } else if (block.chainid == 31337) {
            return ITablelandTables(LOCAL_TABLELAND);
        } else {
            revert ChainNotSupported(block.chainid);
        }
    }
}

// File: contracts/ITablelandRigPilots.sol



// SPDX-License-Identifier: Unlicense
pragma solidity >=0.8.10 <0.9.0;

/**
 * @dev Interface of a TablelandRigPilots compliant contract.
 */
interface ITablelandRigPilots {
    // Thrown when attempting to interact with non-owned Rigs.
    error Unauthorized();

    // Thrown if a Pilot's contract is not ERC-721 compliant or pilot ID is greater than a uint32.
    error InvalidCustomPilot(string msg);

    // Thrown when a Garage action is attempted while a Rig is in a `GarageStatus` that is invalid for it to be performed.
    error InvalidPilotStatus();

    // Thrown upon a batch pilot update error.
    error InvalidBatchPilotAction();

    // Values describing a Rig's Garage status.
    enum GarageStatus {
        UNTRAINED,
        TRAINING,
        PARKED,
        PILOTED
    }

    // Pilot info for a Rig.
    struct PilotInfo {
        // The garage status of the Rig
        GarageStatus status;
        // Starting block number of pilot's flight time
        uint64 started;
        // Whether or not the Rig can be piloted
        bool pilotable;
        // Address of the ERC-721 contract for the pilot
        address addr;
        // ERC-721 token ID of the pilot at `address`
        uint256 id;
    }

    /**
     * @dev Emitted when a Rig starts its training.
     */
    event Training(uint256 tokenId);

    /**
     * @dev Emitted when a Rig is piloted.
     */
    event Piloted(uint256 tokenId, address pilotContract, uint256 pilotId);

    /**
     * @dev Emitted when a Rig is parked.
     */
    event Parked(uint256 tokenId);

    /**
     * @dev Returns the address of the contract parent parent.
     */
    function parent() external view returns (address);

    /**
     * @dev Returns the Tableland table name for the pilot sessions table.
     */
    function pilotSessionsTable() external view returns (string memory);

    /**
     * @dev Retrieves pilot info for a Rig.
     *
     * tokenId - the unique Rig token identifier
     *
     * Requirements:
     *
     * - `tokenId` must exist
     */
    function pilotInfo(
        uint256 tokenId
    ) external view returns (PilotInfo memory);

    /**
     * @dev Returns a pilot's start time.
     *
     * tokenId - the unique Rig token identifier
     */
    function pilotStartTime(uint256 tokenId) external view returns (uint64);

    /**
     * @dev Trains a Rig for a period of 30 days, putting it in-flight.
     *
     * sender - the initiator address
     * tokenId - the unique Rig token identifier
     *
     * Requirements:
     *
     * - `sender` must own the Rig
     * - `tokenId` must exist
     * - pilot status must be valid (`UNTRAINED`)
     */
    function trainRig(address sender, uint256 tokenId) external;

    /**
     * @dev Puts a single Rig in flight by setting a custom `Pilot`.
     *
     * sender - the initiator address
     * tokenId - the unique Rig token identifier
     * pilotContract - ERC-721 contract address of a desired Rig's pilot
     * pilotId - the unique token identifier at the target `pilotContract`
     *
     * Requirements:
     *
     * - `tokenId` must exist
     * - `sender` must own the Rig
     * - ability to pilot must be `true` (trained & flying with trainer, or already trained & parked)
     * - `pilotContract` must be an ERC-721 contract; cannot be the Rigs contract
     * - `pilotId` must be owned by `msg.sender` at `pilotContract`
     * - `Pilot` can only be associated with one Rig at a time; parks the other Rig on conflict
     */
    function pilotRig(
        address sender,
        uint256 tokenId,
        address pilotContract,
        uint256 pilotId
    ) external;

    /**
     * @dev Parks a Rig and ends the current `Pilot` session.
     *
     * tokenId - the unique Rig token identifier
     * force - boolean to force park a Rig (contract owner only)
     *
     * Requirements:
     *
     * - `tokenId` must exist
     * - `sender` must own the Rig
     * - pilot status must be `TRAINING` or `PILOTED`
     * - pilot must have completed 30 days of training
     */
    function parkRig(uint256 tokenId, bool force) external;

    /**
     * @dev Updates the value of a pilot's `owner` in the current session, upon in-flight token transfers.
     *
     * tokenId - the unique Rig token identifier
     * newOwner - address of the new token owner
     *
     * Requirements:
     *
     * - A parent method should implement a check to verify a caller owns `tokenId`, then call `updateSessionOwner`
     */
    function updateSessionOwner(uint256 tokenId, address newOwner) external;
}

// File: contracts/TablelandRigPilots.sol



// SPDX-License-Identifier: Unlicense
pragma solidity >=0.8.10 <0.9.0;

import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC721/IERC721Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/introspection/ERC165CheckerUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/math/MathUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import "@tableland/evm/contracts/utils/SQLHelpers.sol";
import "@tableland/evm/contracts/utils/TablelandDeployments.sol";
import "./ITablelandRigPilots.sol";

/**
 * @dev Implementation of {ITablelandRigPilots}.
 */
contract TablelandRigPilots is
    ITablelandRigPilots,
    OwnableUpgradeable,
    UUPSUpgradeable
{
    using ERC165CheckerUpgradeable for address;

    // Table prefix for the Rigs pilot sessions table.
    string private constant _PILOT_SESSIONS_PREFIX = "pilot_sessions";

    // Number of blocks that a Rig must train before piloting.
    uint256 private constant _PILOT_TRAINING_DURATION = 172800;

    // Mask of the lower 64 bits of a pilot; the flight start time
    uint256 private constant _BITMASK_START_TIME = (1 << 64) - 1;

    // Mask of all pilot bits, except the start time
    uint256 private constant _BITMASK_START_TIME_COMPLEMENT =
        _BITMASK_START_TIME ^ type(uint256).max;

    // Bit position of the pilot ID
    uint256 private constant _BITPOS_PILOT_ID = 64;

    // Bit position of the pilot contract
    uint256 private constant _BITPOS_PILOT_ADDR = 96;

    // Address of parent contract
    address private _parent;

    // Table ID for the Rigs pilot sessions table.
    uint256 private _pilotSessionsTableId;

    // Tracks the Rig `tokenId` to its current pilot, represented as a packed `uint256`.
    //
    // Bits layout:
    // - [0..63]    `startTime` - starting block number of pilot's flight time
    // - [64..95]   `pilotId` - ERC-721 token ID of the pilot at `pilotAddr`
    // - [96..255]  `pilotAddr` - address of the ERC-721 contract for the pilot
    mapping(uint16 => uint256) private _pilots;

    // Tracks the packed "pilot data" (pilot contract and pilot ID) to the Rig `tokenId`.
    // Used to help check if a custom pilot is in use.
    mapping(uint192 => uint16) private _pilotIndex;

    function initialize(address parent_) public initializer {
        __Ownable_init();
        __UUPSUpgradeable_init();

        _parent = parent_;
        _pilotSessionsTableId = TablelandDeployments.get().createTable(
            address(this),
            SQLHelpers.toCreateFromSchema(
                "id integer primary key,"
                "rig_id integer not null,"
                "owner text not null,"
                "pilot_contract text,"
                "pilot_id integer,"
                "start_time integer not null,"
                "end_time integer",
                _PILOT_SESSIONS_PREFIX
            )
        );
    }

    /**
     * @dev Throws if called by any account other than the parent.
     */
    modifier onlyParent() {
        _checkParent();
        _;
    }

    /**
     * @dev Throws if the sender is not the parent.
     */
    function _checkParent() private view {
        require(parent() == _msgSender(), "Pilots: caller is not the parent");
    }

    // =============================
    //      ITABLELANDRIGPILOTS
    // =============================

    /**
     * @dev See {ITablelandRigPilots-parent}.
     */
    function parent() public view returns (address) {
        return _parent;
    }

    /**
     * @dev See {ITablelandRigPilots-pilotSessionsTable}.
     */
    function pilotSessionsTable() external view returns (string memory) {
        return
            SQLHelpers.toNameFromId(
                _PILOT_SESSIONS_PREFIX,
                _pilotSessionsTableId
            );
    }

    /**
     * @dev See {ITablelandRigPilots-pilotInfo}.
     */
    function pilotInfo(
        uint256 tokenId
    ) external view returns (PilotInfo memory) {
        return
            PilotInfo(
                _pilotStatus(tokenId),
                pilotStartTime(tokenId),
                _canPilot(tokenId),
                address(
                    uint160(_pilots[uint16(tokenId)] >> _BITPOS_PILOT_ADDR)
                ),
                uint256(uint32(_pilots[uint16(tokenId)] >> _BITPOS_PILOT_ID))
            );
    }

    /**
     * @dev See {ITablelandRigPilots-pilotStartTime}.
     */
    function pilotStartTime(uint256 tokenId) public view returns (uint64) {
        return uint64(_pilots[uint16(tokenId)]);
    }

    /**
     * @dev Returns a pilot's data (packed `uint32` pilot ID and `uint160` pilot contract).
     *
     * tokenId - the unique Rig token identifier
     */
    function _pilotData(uint256 tokenId) private view returns (uint192) {
        return uint192(_pilots[uint16(tokenId)] >> _BITPOS_PILOT_ID);
    }

    /**
     * @dev Sets a pilot's start time.
     *
     * tokenId - the unique Rig token identifier
     * startTime - the starting block number when putting a Rig into flight
     */
    function _setStartTime(uint16 tokenId, uint64 startTime) private {
        // Cast `startTime` with assembly to avoid redundant masking
        uint256 startTimeCasted;
        assembly {
            startTimeCasted := startTime
        }

        // Set the pilot, using the complement to mask all bits, except the start time
        // If the provided start time is zero, the mask already sets it to zero
        uint256 pilot = _pilots[tokenId];
        _pilots[tokenId] = startTimeCasted == 0
            ? pilot & _BITMASK_START_TIME_COMPLEMENT
            : (pilot & _BITMASK_START_TIME_COMPLEMENT) | startTimeCasted;
    }

    /**
     * @dev Sets the "pilot data" (both the pilot ID and pilot contract) for a pilot.
     *
     * tokenId - the unique Rig token identifier
     * pilotAddr - ERC-721 contract address of a desired Rig's pilot
     * pilotId - the unique token identifier at the target `pilotAddr`
     */
    function _setPilotData(
        uint16 tokenId,
        uint160 pilotAddr,
        uint32 pilotId
    ) private {
        // Cast "pilot data" (pilot contract and pilot ID) with assembly to avoid redundant masking
        uint256 pilot = _pilots[tokenId];
        uint256 pilotAddrCasted;
        uint256 pilotIdCasted;
        assembly {
            pilotAddrCasted := pilotAddr
            pilotIdCasted := pilotId
        }

        // Set the pilot by first masking the start time
        pilot =
            (pilot & _BITMASK_START_TIME) |
            (pilotIdCasted << _BITPOS_PILOT_ID) |
            (pilotAddrCasted << _BITPOS_PILOT_ADDR);
        _pilots[tokenId] = pilot;
    }

    /**
     * @dev Returns the current Garage status of a Rig.
     *
     * tokenId - the unique Rig token identifier
     */
    function _pilotStatus(uint256 tokenId) private view returns (GarageStatus) {
        // The `park` logic sets "pilot data" (pilot ID and pilot contract) to `0` if both of these are true:
        //   - Pilot data is currently `1` (contract is zero and trainer pilot is in use, `1`)
        //   - Rig has not been training for long enough
        // i.e., `park` results in a status of `UNTRAINED` or `PARKED`
        // Invariant: pilot data cannot be `0` if `startTime` is > `0`
        return
            pilotStartTime(tokenId) == 0
                ? (
                    _pilotData(tokenId) == 0
                        ? GarageStatus.UNTRAINED
                        : GarageStatus.PARKED
                )
                : (
                    _pilotData(tokenId) == 1
                        ? GarageStatus.TRAINING
                        : GarageStatus.PILOTED
                );
    }

    /**
     * @dev Returns whether or not a Rig can be piloted.
     *
     * tokenId - the unique Rig token identifier
     */
    function _canPilot(uint256 tokenId) private view returns (bool) {
        // Cannot switch real pilots mid-flight, but can go from trainer -> real pilot
        // There are two ways to pilot:
        //   1. In a `PARKED` status
        //   2. In a `TRAINING` status for long enough (30 days; 172800 blocks)
        GarageStatus status = _pilotStatus(tokenId);
        return
            status == GarageStatus.PARKED ||
            (status == GarageStatus.TRAINING &&
                block.number >=
                pilotStartTime(tokenId) + _PILOT_TRAINING_DURATION);
    }

    /**
     * @dev See {ITablelandRigPilots-trainRig}.
     */
    function trainRig(address sender, uint256 tokenId) external onlyParent {
        // Validate the Rig is untrained
        if (_pilotStatus(tokenId) != GarageStatus.UNTRAINED)
            revert InvalidPilotStatus();

        // Start training
        _setStartTime(uint16(tokenId), uint64(block.number));

        // Assign a trainer pilot to the Rig in `_pilots`
        // The "pilot data" is pilot contract `0` and pilot ID `1`
        _setPilotData(uint16(tokenId), 0, 1);

        // Insert the Rig training session into the Tableland pilot sessions table
        TablelandDeployments.get().runSQL(
            address(this),
            _pilotSessionsTableId,
            SQLHelpers.toInsert(
                _PILOT_SESSIONS_PREFIX,
                _pilotSessionsTableId,
                "rig_id,owner,start_time",
                string.concat(
                    StringsUpgradeable.toString(uint16(tokenId)),
                    ",",
                    SQLHelpers.quote(StringsUpgradeable.toHexString(sender)),
                    ",",
                    StringsUpgradeable.toString(uint64(block.number))
                )
            )
        );

        emit Training(tokenId);
    }

    /**
     * @dev See {ITablelandRigPilots-pilotRig}.
     */
    function pilotRig(
        address sender,
        uint256 tokenId,
        address pilotAddr,
        uint256 pilotId
    ) external onlyParent {
        // Verify the `pilotId` fits into a `uint32` (required for packing)
        if (pilotId > type(uint32).max)
            revert InvalidCustomPilot("pilot id too big");

        // Check if `pilotAddr` is an ERC-721; cannot be the Rigs contract
        if (
            pilotAddr == parent() ||
            !pilotAddr.supportsInterface(type(IERC721Upgradeable).interfaceId)
        ) revert InvalidCustomPilot("pilot contract not supported");

        // Check ownership of `pilotId` at target `pilotAddr`
        if (IERC721Upgradeable(pilotAddr).ownerOf(pilotId) != sender)
            revert InvalidCustomPilot("unauthorized");

        // Validate the Rig can be piloted
        if (!_canPilot(tokenId)) revert InvalidPilotStatus();

        // Initialize the packed "pilot data" (pilot ID `uint32` with a pilot contract `uint160`, shifted 32 bits)
        uint192 pilotData = (uint192(pilotId) |
            (uint192(uint160(pilotAddr)) << 32));

        // Verify if a pilot is already in use, by checking:
        // 1. Has the custom pilot been used before
        // 2. Was the pilot most recently used by a *different* Rig
        // 3. Is the other Rig in-flight (not `PARKED`)
        // If a different, in-flight Rig is using this pilot, park the other Rig
        if (
            _pilotIndex[pilotData] != 0 &&
            _pilotIndex[pilotData] != tokenId &&
            _pilotStatus(_pilotIndex[pilotData]) != GarageStatus.PARKED
        ) parkRig(_pilotIndex[pilotData], false);

        // If the Rig is training, end its training session (no parking required) to then open a new pilot session
        // Pilot has completed training at this point (training validation is checked above)
        if (_pilotStatus(tokenId) == GarageStatus.TRAINING) {
            // Update the pilot's existing training session with its `end_time`
            string memory setters = string.concat(
                "end_time=",
                StringsUpgradeable.toString(uint64(block.number))
            );
            // Only update the row with the matching `rig_id` and `start_time`
            string memory filters = string.concat(
                "rig_id=",
                StringsUpgradeable.toString(uint16(tokenId)),
                " and ",
                "start_time=",
                StringsUpgradeable.toString(pilotStartTime(tokenId))
            );
            TablelandDeployments.get().runSQL(
                address(this),
                _pilotSessionsTableId,
                SQLHelpers.toUpdate(
                    _PILOT_SESSIONS_PREFIX,
                    _pilotSessionsTableId,
                    setters,
                    filters
                )
            );
        }
        // The Rig is either `PARKED` or setting its first pilot while in a `TRAINED` status
        // Set the start time for the new pilot session
        _setStartTime(uint16(tokenId), uint64(block.number));

        // Insert the pilot into the Tableland pilot sessions table
        TablelandDeployments.get().runSQL(
            address(this),
            _pilotSessionsTableId,
            SQLHelpers.toInsert(
                _PILOT_SESSIONS_PREFIX,
                _pilotSessionsTableId,
                "rig_id,owner,pilot_contract,pilot_id,start_time",
                string.concat(
                    StringsUpgradeable.toString(uint16(tokenId)),
                    ",",
                    SQLHelpers.quote(StringsUpgradeable.toHexString(sender)),
                    ",",
                    SQLHelpers.quote(Strings.toHexString(pilotAddr)),
                    ",",
                    StringsUpgradeable.toString(uint32(pilotId)),
                    ",",
                    StringsUpgradeable.toString(uint64(block.number))
                )
            )
        );

        // Update the pilot data and index
        _setPilotData(uint16(tokenId), uint160(pilotAddr), uint32(pilotId));
        _pilotIndex[pilotData] = uint16(tokenId);

        emit Piloted(tokenId, pilotAddr, pilotId);
    }

    /**
     * @dev See {ITablelandRigPilots-parkRig}.
     */
    function parkRig(uint256 tokenId, bool force) public onlyParent {
        // Ensure Rig is currently in-flight
        GarageStatus status = _pilotStatus(tokenId);
        if (
            !(status == GarageStatus.TRAINING || status == GarageStatus.PILOTED)
        ) revert InvalidPilotStatus();
        // Session update type is dependent on training completion status
        // Use `setters` for setting SQL update values, and `startTime` is used for checking training completion status
        string memory setters;
        uint64 startTime = pilotStartTime(tokenId);
        bool trainingIncomplete = status == GarageStatus.TRAINING &&
            !(block.number >= startTime + _PILOT_TRAINING_DURATION);
        // Pilot training is incomplete; reset the training pilot such that the Rig must train again
        if (trainingIncomplete) _setPilotData(uint16(tokenId), 0, 0);
        // If the pilot is untrained or being force parked, there are zero flight time rewards
        if (trainingIncomplete || force) {
            // Update the row in pilot sessions table with its `end_time` equal to the `start_time`
            setters = string.concat(
                "end_time=",
                StringsUpgradeable.toString(startTime)
            );
        } else {
            // Training is complete, and the Rig is being parked without "malicious" force park origins
            // Update the row in the pilot sessions table with its `end_time` to accrue flight time rewards
            setters = string.concat(
                "end_time=",
                StringsUpgradeable.toString(uint64(block.number))
            );
        }

        // Only update the row with the matching `rig_id` and `start_time`
        string memory filters = string.concat(
            "rig_id=",
            StringsUpgradeable.toString(uint16(tokenId)),
            " and ",
            "start_time=",
            StringsUpgradeable.toString(startTime)
        );

        // Set the `startTime` to `0` to indicate the Rig is now parked
        _setStartTime(uint16(tokenId), 0);

        // Update the pilot information in the Tableland pilot sessions table
        TablelandDeployments.get().runSQL(
            address(this),
            _pilotSessionsTableId,
            SQLHelpers.toUpdate(
                _PILOT_SESSIONS_PREFIX,
                _pilotSessionsTableId,
                setters,
                filters
            )
        );

        emit Parked(tokenId);
    }

    /**
     * @dev See {ITablelandRigPilots-updateSessionOwner}.
     */
    function updateSessionOwner(
        uint256 tokenId,
        address newOwner
    ) external onlyParent {
        // Update the row in pilot sessions table with its new `owner`
        uint64 startTime = pilotStartTime(tokenId);
        string memory setters = string.concat(
            "owner=",
            SQLHelpers.quote(StringsUpgradeable.toHexString(newOwner))
        );
        // Only update the row with the matching `rig_id` and `start_time`
        string memory filters = string.concat(
            "rig_id=",
            StringsUpgradeable.toString(uint16(tokenId)),
            " and ",
            "start_time=",
            StringsUpgradeable.toString(startTime)
        );
        // Update the pilot information in the Tableland pilot sessions table
        TablelandDeployments.get().runSQL(
            address(this),
            _pilotSessionsTableId,
            SQLHelpers.toUpdate(
                _PILOT_SESSIONS_PREFIX,
                _pilotSessionsTableId,
                setters,
                filters
            )
        );
    }

    /**
     * @dev Required to create and receive an ERC-721 Tableland TABLE token for pilot sessions.
     */
    function onERC721Received(
        address,
        address,
        uint256,
        bytes calldata
    ) public pure returns (bytes4) {
        return 0x150b7a02;
    }

    // =============================
    //       UUPSUpgradeable
    // =============================

    /**
     * @dev See {UUPSUpgradeable-_authorizeUpgrade}.
     */
    function _authorizeUpgrade(address) internal view override onlyOwner {} // solhint-disable no-empty-blocks
}