// File: contracts/OC.sol




// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @title: Ozy collection
/// @author: manifold.xyz

import "./manifold/ERC721Creator.sol";

////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//                                                                                                            //
//                                                                                                            //
//    J??J???J?Y???J??????7???????7?J????7?7???????7????J??????J????J???J7??????7777???77??J?J777J????7??7    //
//    JJ???J???J5??J?J????J?J?Y?7?7?J7?7????J?????????J?????????????J?7????7??7?777!??77?777????7?J???7???    //
//    JJ??J?JJ?JJJ?J????J??????Y??7?????J???J??77??7???7??7??J??J5??7???&&77?75??7777????7?7?7?J??7?7?!7??    //
//    ?JJ??JJ???JJ?J??&???J?7???7????77????7?7????7???7???J7???????J7??&&Y?PJ77?7&#7?Y????7??7?J??7?7777?J    //
//    ?7?J???????Y??JJ?Y&#?77?77?&7J77?????????J?7?77?J7?J?77JJ?7?J?J?&&B7???77J&&?777?!?7??7???7?77777???    //
//    ???7???Y??????J??7J@&&77????@&P????????JJ????7?7?????J?J77J???7@@&?77??7@@&7?7????J??77???777777????    //
//    ??J?7J7JJ????J7??????&#&7????&&&7J?????????7?7???J????J7JJ????@@@7?????@@?J?@G?J??J??7777777?77?7?7?    //
//    ?Y????5JY???J?777?@P?7@@&#??J?&@@7??7??77?7??77?????J??J7???Y@@&5J???@@@JJ&@&J??77???7?777???7???JJ?    //
//    ??7?????7?????77?77@@B??@@&?J77&&&??J?J7??J7J???J?7?777??7?J@@@?7???@@J?7@@??????7?77?7?77??J?????7?    //
//    ?????J?J?7?7??J????J?@@@??@&&??75&&Y7?YJ#@@@@@&&&B&@&&??77?&@@???7G@@??5@@??7????7?77?7??7???J?7????    //
//    75??YJJ??7??7??J?????7?@@7?@@&???Y&&&&&@@@@@@@&&&##@&&&@&&@&&?5??@@@?G@@J????&@&J????????????????777    //
//    ??7J7??7???????7?????????@@??@&&&&@&&&@@&#@&@@&&##B#P###&&&@&@@P@@??@@?7?7P@@J?J???J??JJ??????JJJ?JJ    //
//    ??J7???J???7??7?7??J?5J?JJ?@@G&&&&@@&@&@##&@&@B@#&&&B&&#G##&&@&@@&@@@???@@@?777J??????7J7?77????????    //
//    ??7?JJ???77????J?J????????J@@@@@&&#&&&&@###&@G5BBG&5Y&P&####G#&&&@&@@@@@?J?J???JY??77??77???7J???J??    //
//    ???J?77?7?77?7??J?JJ?7?7?#&@@@@@######&&&&&&&#&#&##BG5JJ?PYBGB#&#@&@&@??7?Y??J7?7?????J7?77?????YJ7Y    //
//    J??????????7?????7?7J???#@&@&@@@@&#&&B&#BGPGPB5PPP5###GG5YYYPP#BB&@@@&J7YJ?7?J?Y7?7Y7777??7?J?????JJ    //
//    ?J???????????J7?????J??&&&&&&@@@@#&G##B&&&BP#@&G&5#BPY?P#B5PGGJ&&#@@@BJ???J??J?J?????YJ??Y???J77????    //
//    ??7???J?????????????J?#&@&@@@&@&@@&B#&B&P#G#BGPG5#BB5&B5BPGBP#GB&#&&&@5???7??JJ??7?Y?77??7777?7?????    //
//    ??J7???J?JJ???J?YJ?J??&&&&&@&@@&@&#&&&B####B###GGPBP#PBB&GYGP#B##G#&&#@???????????Y?????77???????JJ?    //
//    ?7??7????????????????J@&@@&@@@@@@@&&&&&&B#####P#BBBB#PY5#&&#BPP#BGBG@&&J77??7??????J?J?????7?J??????    //
//    ??????7???????7??7?J??@@@@@@&&&&@@@@@@G@&#B###@##G#######P&&BB5B#&#&&@&@?7?777??7???JY?77??J???Y????    //
//    ??????7J7?7J???7?????Y@@@@@@@&@@@@@@@@@&&&&&@&#@@&#@@PB@&B&&##BP#&&&#&@@Y7???????J????J??7??????????    //
//    J???YJ???7?7????7?7?7?&@@@@@@#&&&&&@@@@@&&@###&#&&#@&@@&@@@B#B&G&#&&G#&&&&#???J7J??7???????77????J??    //
//    ??7J??????7????????7?7@@@@@@&&@&&&@&@@@@@&@@&###&&B&P@@#@@#PP@&&G&@#&#&&&&&&J???7??7?????777??????JJ    //
//    7????????7?J7?????????&@@@@@@@&&&&@@@@@&@@&#BBG@&&#&#@@&&G##B&&@&@&@&#&#&#&&?J?J7????J7J77??J??????J    //
//    J????????777??J??J??5?J&&@@@@@&@&&&@&&@@&#G@@B7&@&B#&#&@#&@##5@@&@@B&&&####&???J?77?????JJ?7??7??77J    //
//    ?J?JJ7???7?????J??77???&&&&@@@@@&&&&@@@&@&@@@&&@@&&&&&&BY&##P@@@@@&&#@&&#&#?7??????7????77?J???YJ???    //
//    J?????J77???7????????J7J@@@@@@@@@&&&&@@@@@&@@@@&&@@&###G###5##&&@#@@@@#&&&&?7???7?77????7???7????5??    //
//    J???7J?JY???77?7????7?JY&@@@@@@@@@@@&@@@@@@@@@@@@&BB&##5B##BB#&G@&B@@&@&&&7Y7???5???7J7??77????7??J?    //
//    ?7??????7??7J??JJ??J???G&&@@@@@@@@&#@@@@@@@@&&@&&&G&##GBBG&5P#@5@&@@B@@5J?7?77J?7??J?J???????????7??    //
//    ???????7?????JJJ??????J?&#@@@@@@@@@&&&&@#&@&&&@@@#BG&BB#B&&&B##&@@&@@@&??????7??????7??????7777???5?    //
//    5???????J??7??J7?J?????JG@@&@&@@@@#@@@&@#&&&BY&@##@&@&PPB#BB&BB#&B@@@#@5???????7??7??7?7??77?77?????    //
//    ??????????????????77?7???@@&@&@@@@@#@@&&@&#&G&&##&&&#@&&##B###&@@&&@&&@??Y????7??7??7??7?77???????J?    //
//    ???J??????J??JJJJ??????J??#&&@@@&@@&@#@#&&&@&&BB@&&&&P@&PB#&&@&@@&&@&@@@?????77??7????J??7??7???????    //
//    ?????7????????JJJ?????J??J?&@&&@@@@@&&@&@@&&&&&@#&@G#@&B#&&&@@@&@&#@@@@@???J7???????Y???7????77?????    //
//    ?J7??J????7????J??777JJJJJ??#@&&@&&@@@@@@&@&@&&&@&P#@B@@&B@@&@&&&&&&&&@@G7??777?7?Y?????JJ?7?7??J??7    //
//    ??JJJ?JJ?????7?JJJ????J??5?J?5@@&@&&@&&&&@&@@@&@&&@@@#@&@@@@&&&&#P&#@@@@@JJJJ???????77J?????????7???    //
//    7?J?Y????7????J????JJYJ?75J??5J@@@@@&@@@@@@#&&@#&&@#@#@@@@@@@&####@&@@&&&????7?7J?Y??J7J?J??7?7??7??    //
//    ?J???J7???J?????J?J????J??J??J7J@@@@@@&&@&@@&@@@&@@@@@@@@@@@@@#######@@#@&???J?7?7????7J????77?J?JJ?    //
//    ???J??7?J7J7J???J??7??JJ?Y??7J?JJ?@&@@@@@@@@@@@@&@@@@@@@@@@@@@@#PPBJ&G@@@@@J?????7???????YJ??J?J?7??    //
//    J??J?7?J???Y7?J?J?77??J??J7JY??JJ?J&@@&@@@&@@&@@@@@@&&&@@@@@@@#@&&#@G##&@@&@@??77??7?7???????7???7?P    //
//    J????JJ????YJJ!J???7?J??J7JJJJJJJ??J??J????J@@@@@@@@&@&@@&@@@@@&&@GBY5&GG&@@@@&77?7?7???77777?????JJ    //
//    5??7J??J7?J?J????J7?J?J?57?J??????J??J??J?J@@@@@@@@@@&@@@@@&@@@@@@YBB&5@B@@@@@@@&&&77?7?777??7777J??    //
//    ??7J???7???7??????????JJJJ????JJJ??5GJ&@@@@&@@@@@@@@@@@@@&&&@@@&#?&&P#&G@B&@@&@&P&G@@@@??7????7???7?    //
//    ?7??7??????????????????J??J??JJ?@@@@@@@@@@@@@@@@@@@@@@&@@@&@#&#G&&@&##&@@#&&@@@#@&&###&@@#@@?J????7?    //
//    J?????7?????J?7??J??JJ?JYG@@@@@@@@&@@@@@@@@@@@&@@@@@@@@&&@#@&&@&B@&BBPP&G##@@@@@&#&J@@@@@&@@@#&&#@&P    //
//    JJJJJJ?7???????????@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&@@@@@&@@@#@&@@#&P@P@&B&@@@@&##&&@&&@&&@@@@B&&&&    //
//    J?JJ???J?????@@@@@@@@@@@@@&@@@@@@@@@@@@@@@@@@@&@@@@@@@@B&&&#&B@##B&B&##B&&G#BG@#@#B##&@@@&@@@@@#@&@@    //
//    J????J????@@@@@@@@@@@@@@@@&@@@@@@@@@@@@@@@@@@@&@@@@@#@@@&@&@&BG&@&&@@&#&BPGB@&@@&###&@@#@@@&@@@@@@@@    //
//    J???7?J?@@@@@@@@@&@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&@@#@&@@&@&@@@&&&B&@@B#BBBB#B#@#&@@&@@&@&&@@@&@@&@&@&    //
//    ?Y?7??&@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&@@@@&&@@&P&&@BB#&&#@@@@@@@B&&&@&&&@@@@@@@B&&&    //
//    JJ?JJ@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@B@&B#B###P&@@@@@@@@@@&@@@@&&@@@&@@@@#@@@@@    //
//    JJJY@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&@@@&@@&@&B@@@@B@#@&#&&B@@@&@@@&@#&#@&@&@@@&&&&@&@#@@@@@@&@    //
//    ??Y@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&@@@@@@@@@&#@@@@@@@@&&&@@@@@@@#@@@@@@&@@@@@@@@@@@@@@@@@@@@@    //
//    ???@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&@@@@@@@#@@@@&#@##&@@@&@@@@@@&&@&@@@@@@@@&&    //
//    ?J@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@#@&@@G@@#@@@@@&@@@@@@@@@@@&B&&&&@@@@@@    //
//    ??@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&@#@#@#&@@&@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&    //
//    @@@@@B@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@#@&&@@@@@@@@@@&@@@@@@@@@@&@@@@@@@@@@@@@@@@@@@@@@@@&&&@@@@@@@@@    //
//    @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&@&@@@@@@@@@&@&@@@@@@@&&&&@@@@@@@    //
//                                                                                                            //
//                                                                                                            //
////////////////////////////////////////////////////////////////////////////////////////////////////////////////


contract OC is ERC721Creator {
    constructor() ERC721Creator("Ozy collection", "OC") {}
}

// File: contracts/manifold/ERC721Creator.sol




// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @author: manifold.xyz

import "@openzeppelin/contracts/proxy/Proxy.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/StorageSlot.sol";

contract ERC721Creator is Proxy {
    
    constructor(string memory name, string memory symbol) {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0x2d3fC875de7Fe7Da43AD0afa0E7023c9B91D06b1;
        Address.functionDelegateCall(
            0x2d3fC875de7Fe7Da43AD0afa0E7023c9B91D06b1,
            abi.encodeWithSignature("initialize(string,string)", name, symbol)
        );
    }
        
    /**
     * @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 Returns the current implementation address.
     */
     function implementation() public view returns (address) {
        return _implementation();
    }

    function _implementation() internal override view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }    

}

// File: node_modules/@openzeppelin/contracts/proxy/Proxy.sol



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

pragma solidity ^0.8.0;

/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())

            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)

            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())

            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    /**
     * @dev This is a virtual function that should be overridden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);

    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive() external payable virtual {
        _fallback();
    }

    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overridden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}

// File: node_modules/@openzeppelin/contracts/utils/Address.sol



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

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

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

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

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

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// File: node_modules/@openzeppelin/contracts/utils/StorageSlot.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 StorageSlot {
    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
        }
    }
}