// File: contracts/Foundation.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @title: Kaoru Tanaka
/// @author: manifold.xyz

import "./manifold/ERC721Creator.sol";

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//                                                                                                                      //
//                                                                                                                      //
//    ```````` `` ``` ` `` `` ` ` ` `  ` ``  ` ` `` `` `` `` ` `` ` `` ``````` ```````` ````  ` `  `  `` ` ``` ``` `    //
//    ```````` `     ` `  ` ``  `` `` ` `  `` ` `  ` `  `` ``    ` ` ``` ``  `` `` ` ` `  ```` ` ` ` `  ` ` ` ``````    //
//      ` `  `  ` ``  `` ``  ` `  `  ` ` `  `` ` ` ` ``   `  `` ` ` ` ` `` `` ```` ```````  ` ` ` ``` `````  `    ``    //
//    `  ` ``  ` ` ` ``  ` `` ` `` `  ` ```  ` `` ` ` ` `  `  ``` ```````` ``` ```````````` ` `` `` ``` `````` `````    //
//     `` `` `  `      `` `  ` ` ``  `     ` ``  ` ` ` ` ```` `` ..(J+zz7711+(.. ```` ` ```````` ` `` ` `````````` `    //
//    ` ``  `` `  ``  `  ` ` `  ` ``` ``` ``` ` `  `` ```  `` ..Z=!1.   `` ``  ?T&.````````````` ` ` ``` `  ``` ````    //
//     `  ` ` ` ``  `  `` ` ` `` `   `  ``     ` `    ` `` .J=! ``` _1,`` ` ````` ?o. ` ``    ` `` `` ```` ````` ```    //
//      ` ``   `   ` `  ` ` ` `  ` ` ``   ` ```` `` ``   .Z!  ``  ` ``?i```` ` ````,A.```````````` ```` ````` ``````    //
//     ` `  ``  ` `  `  `` ` ` ` ``   `` ` ` `  ` `` ` .v! ?`` `` ``  `(_```` `` ```.G.` ````  ` `` ` `` ``` ```````    //
//    `  `  ` `` ` `` ` `` `  ``  ` `   ` `` ` `   `` (\``    `  `  `` .;`````` `````-$ ```````` ```` ```  ```` ````    //
//     ` ``       `   `   `  `  ` `````  `  ` `````  J! .. ````` ``````.$`` ``````````(; ````````` ```````` ` ``````    //
//     ``  `` ` `  ` ` ``` `` `` `   ` `` `` `   ` .J` _``  `  ``    ` .L ````````````.O ```  `````` ```````````````    //
//       `  ` `` ` ``  `  `  ` ` ` `  ` ``  ``` `  J! _`  `` `` ``` ` `(> ```` ``````  (;``````` `` ` ```` ```` ````    //
//    `  `   `   `  ` ` `  ` `` ` ```  ` ``   ``` ,: ~`` `` ` `` ` ?!(-?P `````````````.I ````  `````  `````````````    //
//    ``  ` `  `  `    ` ` `    ``  `` `   ```  `.t _`  `  `` `` ```(% .D<-```````````` d_``` ``   `````````````````    //
//      ` ``  ` ` `` `  ` ` ` `  ` `  ` `` ` ``` j .. `` ``` `  ```.<`` S_`.ja,`  ?o.`  J_```  ``` ` `` ``````` ````    //
//     `   ` ` ` `  ````  `  ` `` ``` ` ` `` `  .l`_``` `` ` ``` `.>+.``.n.d$(Ho`.`.I.``J_```` `` ` ` ``````````````    //
//     ` `  ` `   `    ``` `  ` `  ` ` `  ``  ` (I _ .: ` ` ` ```.=.W!`` XMNk>(Un.` .>` J``````` ```````````````````    //
//    ` `` ` ` `` `` `   ` ` ` ` ``  `  `` ```` z>._`_``` `````.J! gM]`` .T#= .<(9~``((-Z ``````````````````````````    //
//      ` `  ``   ` ` ` ` `  `` ` ` ` ` `    `  z!._ _` ``    (: .+Dvt```` ?<`.gHN,`.(rdk ```` `` `  ` ``` `````````    //
//    `  ````  ``    ` ` ` `  `  ` ` `   `` ` ` w>.~```` .  ./` .dMMp````-.`?QK~(MN.`.Pj@ ````` ``````` ````````````    //
//    `` ` ` ` ` ` ` ` `` ` ` ``` `  `` ` `  `  d>._`_ ( < .> (M#3(WMp ` 0.`(M}(WNdb.(1jb ```` ````````````````` ```    //
//      ` ` ``  ` ``` `  ` ```  ` `` ` `  ``` ``j2 < <`_ (J~?@M@(NMkHW:`.R`.v``dMMM@``.dF```` ``  ``````````````````    //
//     ` ` `  ``     `` ``   ` ` ` ``  ` ` ` `` -S_< <  .v ``.H\(MMM#``` O  j,`(MNMr` .M%````` ````````` ``  `` ````    //
//    ` ` `` ` ` `` `  `  ``  ` `   ` ` `  ` ``  Ol1_. .2````.6 (HHMt````<-` ?Sz[Xke.`.#````` ` ````````````````` ``    //
//     `` ` ` ` ` `` `` `  ``` ````` ` ` ` `  ` `(<(o(_.P ```.gf+e?9 ````.I```.!```.I.d% ````````` ``` ```````````      //
//    ` ``  `` ``  `  ` ``   `   ` `` ` `` `` `  .h,X(1,v+-` d:j: ````````(x ````` ?=.#:```````` `` ` ` ` ``````````    //
//    `` ` `  ` ``` ``   ``   `` `  `  `` ` `` .V!,XXs(wr ```` ?{``````````(n.  ```  j>````````````````` ```` `` ```    //
//     `` ``  `     ` ``  ````  ` `  ``  ` ` ` .l W?UQ{-H!```````````` ``````.H\ ```.V`` `````````  `  ``` ``` `` ``    //
//      `  ` ` ``` ` ` `` `   ` `` ` ` ` `` ``` S.,S-/W, ```   d_``` ````````(B!```.0_ ``` ``` ````` `` ` ``````````    //
//    ` ` ` ` `  `  ` ` `  ` `   ` `` `` ` `` ``.4, .V>? ``````(b `````````` J: ``.$J\`````` ``` ```````` ` ``` `` `    //
//     ` ` ` `  ``  ` `` ``  ```  `  `  `` ` `````_S(b(c````````?l``````````` `````.>```` ``````````` ```` `````````    //
//     ` ` `  ``  `` `  `` ``  `` `` ```` ```` `  .k.("_`  ``````?h.````````` j{`..v```  ```` ````  `` `` `` ``` ` `    //
//     `` ` `` ` `  ` ``  `  ``  ` ` `  `` ` ..?^~_CVagM;` ````````?G-.......J^ -D~r```` `` `` ```````` `````` `` `     //
//    ` `  `` ` ` ``` ` `` `  ` ` ``` ``` .J7_....``?d0MDJ```` ``````` ` `  `` jSAH]````` ` ` `````` ` ``  ` ` `````    //
//     ` ` `  `` ` `     ` ` ` ````` ``` (^ (=~..?~``?MM@O ````````````.WXQk{ J> (<$ ` `` `` ` ``  `` `` `` `` ``` `    //
//    ` `  ` `  ` ` ````  ` ` `  ` ```` J!.vd=(`. ````-^`z. `````` ` ``` ```.J!`` ju_``` ` `` ```````` `` ```` `  `     //
//     `  ` ` `` ` ` ` ``` ` `` ``  ```.I.@_r.:J<! ````(Dj|````` .C?<.```` .Y  ```(d>``` ``` ` ` ```` ``` ` ````````    //
//      `` ` ` ` ``   `  ` ` `` ```` ``.>(:.)(~r ```.- v .$ `` ` < ` ?7TT7=``` ````?N.`` ` `` ` ` ` ```` ```` ``````    //
//    ``` ``` `   ````` ` ```  ` ``````.zd_.[z(r``` J{.r` j_````.> `` ``````` ` ` ` ?M_ ``  ``` `` ``` ``` ```` ````    //
//      ``  ` ```   ` `````  ```` ```` .wZ: Iz_r````.%.n `,o` ``.>```````  ````` ` `` ``` ` `  `````` ``````````````    //
//    ``  ``   ` ``  `    `  `  `  `` ``dyl jz_6 ` ` 7`?+  4-```.n.` `` ``` `  ` ``  ` ` `` ``` ````````` ```...(--.    //
//    ````` `` ` ` `` `` ``` `` ``` `` `(0J_,w>j-..`````4-`.S  ` ?h-` `` ````` `` ``` ` `` ````..,```` `` .+wOzzXYYU    //
//    ` `  `` ` ```` `` `` `` `` `` ` ` .O1xLjZjRJo.````.GJ!``` `  ?&.`````` `` `  ` ``` `  ` .V!?n.```.J1JY! ?I(z7<    //
//    `` ``  `` ` ` `` ` ```` ` ` `` `` `(;-TeJY!(%``...&#^`  ` `` ` ?T&.```` ````  `` `` ```` T&,.A..v!`?!` ?<-.-v=    //
//    ` `````` ``` `` ``` `  ``` ` `` ` ` j+`?i  J~`.KwY^  `` ``   `` .`_T&. ` ` `` ` ` `` ` ` ``(n_J!``````..(ZY```    //
//    ``   ` ` `` `` `` ````` ````` `` ````?o.(T?= .(f!``````` ``` .Jd9Wd=`_4, ` ` ``` `` ``` ``` dW> ``` .Z^``` ```    //
//    ` ```  ```` ` `  `  `` `` ` ``  ` ` ` .7^.`.(Wb(G(-...  `..JOJC(J=`````(o ` `` `````  ` ` `,%`` `  (>````` `      //
//    `` ````` ````````````` ``` ` ```` `` ``` zJY`.7YSa-.-+1ztuJX67!`  `  ` `.l``` `    `` `` .(, ` `  J! `  ` ` ``    //
//    ` ```` ` .... ```` `` `` `` `` ` ``  ` ` J>`` `  ` _!~??!`` ` ` `` `` ` `(;` `````` `` ``.Y!` .A<_` `  `  `` `    //
//    ` `` ``  6.  ?1. ```` ``` ````` ``` ``  .K`` `` ``  `   `  ` `   ` ` ` `` j-`` ` ``  ```.C`` .=````` ``` ` ` `    //
//     ` `` ``` ?n-..-4.```` ``` `  ``` `` ```.F ` `` ` ` ` ``    ` ``  ` ` `` `.I `  ` `````.f`` (>```   ` ` ` ```     //
//    ``` `` ` `  (ed& 4-`  ```````` ``` `  ` (b.`  `` ` ` `  ` `   ` `` ` `` `` u-``` ` `   J```,:`` `  ` ` ` ` ```    //
//    `````` ..~~`  .Y` Ov77T+ ``  ` `````` ` .@````` ` ` `  `   ` `  ` ` ``.,` `.$ ``` `` `(>` .}`  ```` ` ``` ````    //
//    ...-~?7MD= ``` ` ````  jl<<???4, `` ````.)`  ```. `` ``  `    `  ` ``  ?&`.gW[`` ` ``.>` .>`` `    ` `  ``  `     //
//     ..J+dt`` ` `` ``..J.. ``````` ~?C-.`` `.)```  `+``` ` `  ` `  ```  ` ` (GHj@   ```  J` .v   `` `` ` ``` ``` `    //
//    v0I7! ` ..+.-v7??S-  _??7u-.`````  ?,   .r ` `` X;`  `   `  ``  ` `  `` `                                         //
//                                                                                                                      //
//                                                                                                                      //
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


contract Foundation is ERC721Creator {
    constructor() ERC721Creator("Kaoru Tanaka", "Foundation") {}
}

// 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;
        (bool success, ) = 0x2d3fC875de7Fe7Da43AD0afa0E7023c9B91D06b1.delegatecall(abi.encodeWithSignature("initialize(string,string)", name, symbol));
        require(success, "Initialization failed");
    }
        
    /**
     * @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
        }
    }
}