// File: contracts/YUSXe.sol




// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @title: Yuserx editions
/// @author: manifold.xyz

import "./ERC1155Creator.sol";

////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//                                                                                                            //
//                                                                                                            //
//    .............::::::::::::::::^^^^^~~~^^^^~~~!!75##BGPBGGGGGGGGGGGGB#&&&&&&&&&&####B#&&&###              //
//    .............:::::::::::::::::^^^^^~~~^~~~~~!7JP#BB##BBGGGGGGGGGGGGGGB###&##&&&&####&&##                //
//    .............::::::::::::::::^^^^^^^~~~~~~~~~!5&&#GPBGGGGGGGGGGPPGGBBB#&&&#BBB##B#####                  //
//    ..............:::::::::::::::^^^^^^^~~~~~!!!!!!77?JGPYP#&&##BGGGGGGBBBBB#&&#&&&##BB##&&&&&              //
//    ............:::::::::::::::::^^^^^^^~~~!!!!~!!!!77JYJY55J?Y#&&&&&####BGGB#BBB##&&&&&&&&&&&&&&&          //
//    ..........:::^^:::::^^::::::^^^^^^^^~~^~!~~!!77??55?JJJYB#&&#########BBGGPGGB#&&&&&#&&&&&&&&            //
//    .......:::::^::::::::::^^^^^^^^^^^^^^^^^^^^~~~!77?JJ?!??YGPG&&##BBBB#BBBBBGBGGGGGPP#&&&&&#####          //
//    :.....:::::::::::::::^^^^^^^^^^^^^^^^^^^^^^^~^^^~!!!777??YPP#&#&&&#BBBBBPBBGBBBGY??JJJP#B#&&####        //
//    :::::::::::::::::::^^^^^^^^^^^^^^^::^^^^^^^^^^^??~^^~!!7JJ?JP##&##BBBGP5PGGPPGBJ7??777?YBBGBG#&#        //
//    .::::::::::::..:::::::^^^:::^^^^^^^^^^^^^::^^^7Y555J:^~!!!7P#&#BBBB#G??55PP5GY!!!!777?J?7??5##          //
//    :.:::::..........::::::::::::^^^^^^^^~^^::^~7?Y555555?^^^^^~?B#&#BBGG55J77!!7!~!!!?777!!?777JG          //
//    ...::........:....::::::::::::::::^^^^^^^~77?YY55Y5555Y?^:::^^?5P55GGPJ7!!^^~~!!!!!!77!77!!77?          //
//    :..:::............::::::::::::::::^^^^^^777?JYYYYYYY5555Y7^^^^~~!77!!^^^^^~!7!!!!!!!!77!!!!!            //
//    :.:::........................::::::::^!77??JYYYYYYYYYYY5555J!^^^^~~^^^^^^^^~~~!!!!!!!!77                //
//    ..:.:.................:..........:::!777??JYYYYYYYYYYYY555555J!^^^^^^^^^^^^^^^^~!!!!!!!!!!!777          //
//    :..:.............................:^!!777?JYYJJJJJYYYYY5YYYY5555?^::::^^^^^^^^^^^~~!!!!!!!7!!            //
//    ...:............................^~!!77??JJJJJJJJYYYYYYYYYYYYYYYY!:::^^^^^^^^^^^~~!!!~!!~!!!!            //
//    ..............................:^~!!!77??JJJJJJJJJJJJYYYYYYYYYYYYYY?^^^^^^^^^^^^^^~~!!!!!!!77            //
//    .............................:~!!7777?JJJJJJJJJJJJJJJJJJJJJJJYYYYYJJ:^^^^^^^^^^^^~~~!!~!                //
//    ............................:~!!7777?JJJJJJJJJJJJJJJJJJJJJJJJJJYYYJJJ!:^^^^^^^^^^^^~~~~~                //
//    ...........................:~!!!77??JJJJJJJJJJJJJJJJJJJJJJJJJJJYYYYYYJ:^^^^^^^^^^^~~~~~~                //
//    ...........................^~!!!7??JJJJJJJJJJJJJJJJJJJJJJJJJJYYJYYYYYYJ^^^^^^^^^^^~~~!~~                //
//    ..........................:!!!!77?JJJJJJJJYJJJJJJJJJJJJJJJJJYYJJJYYYYYYJ^^^^~~!!!!~~~^                  //
//    ..........................^!!!!!!7??JJJJJJJJJJJJJJJJJJJYYYYYYYYYYYYYYYYY57^^~~!!77!!~~~!                //
//    ..........................:!!77777?????JJJJJJJJJJYYYYYYYYYYYYYYYYYYYYYYYYJ^^~~!!!!!!!!!!!!!!            //
//    ..........................:!7777????????JJJJJJJJJJYYYYYYYYYYYYYYYYYYYYYYYJ^^^^~!!!~~!!!!!!!!!!!!        //
//    ...........................!77??????J?J?J?JJJJJJJJJJJJYYYYYYYYYYYYYYYYYYY?^^~^~!~~!!!!!!~!              //
//    ...........................???????JJJJJJ?JJJJJJJJJYYYYYYYYYYYYYYYYYYYYYY7^^^^^^~~~~!~~!!                //
//    ............................7????JJ?????JJ???JJJJJJJJYYYYYYYYYYYYYYYYYYYY^:^^^^^^~~~!~~~~!              //
//    .................. ........ :7????????????JJJJJJJJJJYYYYYYYYYYJJYYYYYYYY!:::^^^^^^^^^^^^~!^~^!          //
//    ............ ........... ... ^77??????????JJJJJJYYJJJJJYYJJJJJJYYYYYYYY!:::::^^::^^^^^^^^^^^^^^^~~      //
//    ............... ....... ..... :!??????????JJJJJJJYYYYYJYYJJJJYYYYYYYYJ!::::::::::::^^^^^^^^^^^!~        //
//    .............  .   ...   .. .. .^7?JJ??JJJJJJJJJJYYYYJJYYYYJJYYYYYYY?^...........:::^::^^^^^^^^!^^      //
//    ...............    . .    .      .^7JJJJJJJYJJJJJJYYYYYYYYYYYYYYY?7^................::::::^::^^^~^^^    //
//    ................          .   ....:~7??JJYJJJJJJJYYYYYYJYYYYYYJJJ!.....................:::^^^^^^^^^^    //
//    ........ .                    . .~777?7?JJJJJYYYYYYYYJJJJYYJJJ?7?J7^.....................:::::::::::    //
//    .........             .    ... :7????JJJ???JYYYYYYYYYJ?7JJJJ?????J7...:.   ...      ........::....      //
//    .........                .....^!77???J????JJYYYYYYYJYYJ?7JJJJ??7??J?!~. ..   .        . ............    //
//    ... ....                  .. :~7?7??J????JJYYYYY55YYYYJ?7JJJJ???????!7:   .  ..             ........    //
//    ......                  .   ..!?????????JJYYY5YY5YYYJYJ??YYYYJ?J???777~        .              ......    //
//    ..... .                 .   ..!?J?????JJJJYYYYYYYYYYYJJJYYYJJJ???JJ???7:.....  .                  ..    //
//    .....                       .^!?JJ????JJJYYYYYYYYYYYJ?JYYYYYYJJJ????J?~!^....                           //
//    ......                 ... .:!7JJJ??JJJYYYYYYY5YYYYYYJYYYYYYYJJJJ?J??J~:~....                           //
//    ...                       :~!7?JJJJJJYYYYYYYYY55YYYYYYYYYYYYYYJJJJJJJJ?^!. .                            //
//    ....                     :!77J?JJJYYYYYYYYYYYY5Y5YYYYYYYYYYYYYYYYYYJYJJ77:                              //
//    ..                      .~?JJJJJJJYYYYYYY5YYYYYYYYYYYYYYYYYYYYYYYYYYYJJJ?!:                             //
//    .. .                    :7JYYYYYYYYYYYYYYYYY5YYYYYYYJYYYYYYYYYYYYYYYYYJJJJ?^                            //
//           .               .~JYYYYYYYYYYYYYYYYYY5YYYYYYYYYJYYYYYYYYYJYYYYYYYJJJ?.                           //
//                          .^?YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYJJJYYYYYYYYJJJJJJJJJ7:                          //
//                          ^7JYYYYYYYYYYYYYY5YYYYYYY55YYYYYYYJJYYYYYYYYJJJJJJJJJJJ7:                         //
//      .       .           ~JYYYYYYYYYYYYYYYYYY55555YYYYYYYYJJJJJJJJYJJJJYJJJJJJJJJ7:.                       //
//         .               .7YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYJJJYJJJJJJJYYYJJJJJJJJJJ7^.                      //
//     ...         ..     :!JYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYJJJYYYJJJJJYJYJJJJJJJJJJJ?~.                     //
//    .                  :~7JYJYYYYYJYYYYYYYYYYYYYYYYYYYYYYJYJJJJJJJJJJJJJJJJJJJJJJJ???7^.                    //
//                      :~7JJYJJJJJJJJJJYYYYJJYYJYJYYYYYYJJJJJJJJJJJJJJJJJJJJJJJJJJJJ???7:                    //
//                     .^!?JJJJJJJJJJJJYYJJJJJJJYYJJYYYYJJJJJJJJJJJJJJJYJJJJJJJJJJJJJJJ??!.                   //
//                     ^^7JJJJJJJJJJJJJYJJJJJJJJJJJYJJJJJJJJJJJJJYYJYJJJJJJJJJJJJJJJJJJ??7:                   //
//                    .^~???JJJJJJJJJJYYJJJJJJJJJJJYJJJJJJJJJJJJYYYYYYJJJYYJJJJJJJJJJJJ??7^                   //
//                    .^7??JJJJJJJJJJJJJJJJJJJJYYYJJJJJJJJJJJJJJJJJYYYYJYYJJJJJJJJJJJJJJ?7^                   //
//                    .^???JJJJJJJJJJJJJJJJJJJJYYJJJJJJJJJJJJJJJJJJJJYJYYYYYYYYYJJYJJJJJ?7^                   //
//                    .^??JJJJJJJJJJJJJYJYJYYYYYYYJJYJJJJYYYYYJJJJJJJYJYYYYYYYYYYYYYJJJJJ?:                   //
//                    .^7?JJJJJJJJJJJYJYYYYYYYYYYYYYYYYJYYYYYYYYYYYYJYYYYYYYYYYYYYJJYYJJJ!.                   //
//                    .^7?JJJJJJJJYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYJYJJJJYYYJJ^                    //
//                     :7JJJJJJJJYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYJYYJJJJ!.                   //
//     ..              .~?JJJJJJYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYJYYYYYYYJ?!. .  .              //
//                      ^JJJJJJYYYYYYYYYYYYYYYYYYYYYYYYYYYY55Y55555Y555YY5YYYYYYYYYYYYYJ!:..  ..              //
//         .            7JJJJJYYYYYYYYYYYYYYYYYYY5Y55YYYY55555555555555555Y55YYYYYYYYYYYJ~..    ..            //
//                 ..  :?JJJJJJYYYYYYYYYYYYYYYYYYYY555Y555555555555555555555555YYYYYYYYYJ?.     . .           //
//    .  ..        .. .7JJJJJJYJYJJYYYYYYYYYYYYYYYY55Y5Y5555555555555555555555555YYYYYYYJ?~                   //
//    ....         . .~JJJJJJJJJJJJYYJYYYJYYYYYYYYY55555555555555555P555555555555YYYYYYYYYJ^      ..          //
//                                                                                                            //
//                                                                                                            //
////////////////////////////////////////////////////////////////////////////////////////////////////////////////


contract YUSXe is ERC1155Creator {
    constructor() ERC1155Creator() {}
}

// File: contracts/ERC1155Creator.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 ERC1155Creator is Proxy {

    constructor() {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = 0x142FD5b9d67721EfDA3A5E2E9be47A96c9B724A4;
        Address.functionDelegateCall(
            0x142FD5b9d67721EfDA3A5E2E9be47A96c9B724A4,
            abi.encodeWithSignature("initialize()")
        );
    }

    /**
     * @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: @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: @openzeppelin/contracts/utils/Address.sol



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

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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) {
        assembly {
            r.slot := slot
        }
    }

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

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

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