// File: contracts/EOI.sol




// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @title: Embers of insanity
/// @author: manifold.xyz

import "./manifold/ERC721Creator.sol";

////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//                                                                                                            //
//                                                                                                            //
//                                                                                                            //
//            ....'',,;;::cllooddxkkOkkOOOOOOOOkkxxxdoololc:,........                                         //
//            ....',,,;::ccloddxxkOOOOkk00KKKK000OOOOxdolllc:;,'.....                                         //
//             .....'',;;:cldxxkOOOO00O0KKXXXKOxl:;;,'......';cllc:;,...                                      //
//              ......',;;cldxkOOOO0KXXXXXKko:'.    ........':oxkOOOxoc:,..                                   //
//              .......',;codkOOOO0XNNNXX0l'.     ..............';:lokkxdl,.....                              //
//              .......';cldxkO00KXX0xlc:,.................      ....,codxdl:,.....                           //
//              .......';codk0Okxl:,...........,'.....'...            ...,:::c:'...                           //
//              ......',;cokkd:..    ...';;,;:llc;,,;,'....      .  ...   ..';coo:..                          //
//            ....'''',;:lol;.      ....:dOK0k0K0Oxooo:,''.............      ..:k0l..                         //
//            ...'',,,;;,..'.      ....:xKKkk0NWWNX0xl:;;;,'....................;xkc..                        //
//            ...',;;;'.  .,.  .......;dxddxKNWWWWNKxdoc:;,'..........,;,........'coc'..                      //
//           ...',;::'    ..  ........,cc:cxKNWWWWNX0xc;,,,'....''.',;:,',,,;::,....,,... ..                  //
//           ..',;::'      .        .:ddc,;oKWWWNNKko:,,,,,'''''''',;;:loddk0KKKxc'. .........                //
//          ...',;,.     ...       .,c:'..l0KOxkOkkkd:,,,,,'''''';:looxkkk0KXNNNNX0d:....'.......             //
//         ....,,..     .'..       .......;oc:lodOKOc,,,,,,,,,,;:codxxkkk0KXNWWWWWNKkl'..;;........           //
//         ...'..       ..             ...'.'::lkX0c,;,,,,,,;;:cloddxkkkO0XNWWWWWWWX0xo,.:o:'.......          //
//       ......                        .......;lloc;l:,,,;;:::cclodxkkkO0KKXNWNNNNNXKOkc.;dd:,''....          //
//      ......                         ..  ...:c'..,:;;;;:cccccloddkkkOO0KKXNNNNNNNXKOOl.,dxocc:,....         //
//      ....                                ..'. ..::,,,;:llllloddxkOOO00KKXNNNNNNXXK00c.'lxkkko:'...         //
//       ..         .                        ..  .,c,.',;;ccclloodxO0000KKKXXNXXXXXXKKKl..:x00KOd;....        //
//                                               .''...''',;::ccldxk000KKK0KXXXXXXXXXXKo..;d0KXKkl,....       //
//                  .                           ... ..'''',;:cllodxkOKKKKKKKXXXXXXXXXXXd..'ckKXKOo:'....      //
//                  .            ....            ............',:cldk0KKXXXKXXXNXXXXNNXNk'.':xKXXOdc,.....     //
//     .                         ...             ............    ..,coOKXXXXXXXXXXXNNX0k;..;dKXNKkl:,.....    //
//    ....                        .            .'..';;,,,,,..        .,dOKXXXXXXKKOdc;;:,..;xKXNX0xo:'....    //
//    .....                ...                 ,:........    ..   .....;ok0KKXX0xl;....'. .'xXXKKK0kl,....    //
//    ..,:,.               ...                .;.               .'.  ...,coxKNKo'..   ..  ..dXKOkO0Odc,...    //
//    ',;:,.,,..           ...                ..              .,';'     .;oONNd..  .'.    ..oKXkookOkdc,..    //
//    ',;:'.;lllc.      .......              ......       ..';dd,..    ..c0NWO, .'.;o;    ..c0X0xccxOOxl,.    //
//    ',,,..,;;;c:.   .........              ...';;..     ...':cc;..  ...cKNWXl.'cllc,'.  .':kXX0xlcoxxo:'    //
//    ..',..,;;::;.  ...........            .,,.'cddc'.....'';odl,.......:0NWWXd;;cloxk:  .,lxKXX0kl;:ll:,    //
//    ...''.,::cll'     ... .....           .:. .;xOOxooodkkkkxoc;'......;kXNWWN0Okk0XXd. .,dO0XXK0xc,,,,.    //
//    ...,'';::ldd,         ......          ..  ..:xO000000K0kkOOkc'.....,dKNWWWWNNXXNNO:..,xKKKXXKkd:'...    //
//    ..'''',;:clo,         ...'..      ..        .;okOOOOO000KKX0l,'....'o0XNWWWWWWWWN0c..,kKKKKXKOxc'..     //
//    .'''''',;::c'         .....      .,.         ..;clllokO0KXX0o;,....'lOXNWWWWWWNNNk;..'xXX00KX0xc'.      //
//    .''''..'',;;,.  .     ..         .;.           ..,;;cdO00KXXOc'....;lxOKNNNNWWX0kc....oXX0kOXKko;..     //
//    '''........,,. ..                ':..          ...',:ldk0KXN0c..'';llc:ldO00XNKdc,. ..cXN0xx0NKxc,.     //
//    ,,..........''.                 .oOc.           ....,:cdO0KKk,  .,;,...',d0KKX0l:'. ..cKXOddOXXOl;..    //
//    ,'...........,;.                :Oc.             ....,:lxkOOo.   .    .,xXNNNXOc,.....lKKdldOKKkl,..    //
//    ''...... .....,;'.             .dc.              .....;:lool;.     .'oxkXWWWWXxc,....'l0kl:lkKKkl;..    //
//    .......    ....,;,..           co.              ......',::;'..   ..,xNNXXWWWWXxl,...';lxo:;;d00koc,.    //
//    ......       ...','.....      'o'           ...........',,'.... ..'lOXXXXNNWWXOl'...,;clc;,'ckOkdc;.    //
//    .....         ...'......     .c:            ............''.........;dOO0KXXNNXOc...,,;:::,..,okxol:,    //
//    ......        ...... .'.     ,c.           .........................:oddkkOkO0x,..';;;::;'..';dxoc:;    //
//    .......      ....... ...    .;:.            ...';;,'....'........';lkKXXNNX0kkl...,::::;,...',:odl:;    //
//    ..........   ........... ...'...            ...'::;,'...'''......',cxKNNNNNNN0:...;ll:;,'...';;:c:;,    //
//    ..''....... ....'''..''. ...'..   .           ..',;,'....'..........,:ldxkKXXx'...lxo:,'....'';;,,..    //
//    ..';;,,'........',;;;;,... ....   ....        ...'''...................'cxKN0:....oOd:'......',,'..     //
//    ..',;;;'..''...',;::::;....''..   ......      ...''............';:lodkO0KNNNk,....lkdc'......','...     //
//    ...',;;,''','..',;:::::'..'...     ..............'''.........';cxKNNNWWWWWWNd'.'..cdol;....'',,,..      //
//    ....',;;,,,''..',;:::::,...             .......',,,,,'........;:ok0XNNNWNNNKl..,'.;ool:'..''',,,'..     //
//    ......'',;,,'..',;;::::;'.               ......';;:::;,'......',;clk0KKKKKKx,..::..cloc,'.',,,,,'..     //
//    ........',,,'..',;;::c:;.                   ....',;;::::;,'.....'';cdkkOkxo;...:o'.;:cc;''',;;,'...     //
//    ...........',''',;:::c;'.                .........'',;;;:::;;,,,,;;,:looc;..'..,kc.',,:;'',;;;;'...     //
//    ............'''';:::::;.             ... ............'''','''',;lddc;;'.....;'..dO,..';;'.',,,,'...     //
//    ...  ..........';;::::'.         .....'.......................':dOOl'..... ':'..:Ko...,,'.',,,,''..     //
//        ............,;:::,.          .....''.......'''''.........,;okOkl....'. .;.  'dl..','...'''''....    //
//        ...........',:::c,.          ..'..''........''''.......,;:cxOOdl,...,. .,.  .,,.';;'......''....    //
//        ..........',;::cc:.          ..',.''.................';::cdO0kc;,. .,'.... .....,:;.............    //
//       .......',,,,;::ccllc'          .',,'.................';;::ok0Kk,',. ......  .....';;............     //
//     ......',,;;;;;::cloddxl,..........',,'.......'.........',;;:lk0Kk'.'.   ..    ......;;'......          //
//     .....',;;::::::clodxkkoc:,'......',;;,'.....''... ......'',;cdOKx. ..          .....;;'....            //
//      ....',;;:::::codxkO00dclc;,,'...',::;;;,,,,'..............',:o0d. ..          ... .;;,'...            //
//      ....',;;::::ldxkO0KK0xclc;;,,,''..,:c:::;;,'.... ......  ...':Oo.              .. .;;,''..            //
//    ......',,;;;:cokO0KKKK0dcol:;;;;,'...,:::::;,.....          ...,xl   .      .    .. .;;,''...           //
//    ......'',,;:cldkOKKKKKOololc:;;;;;,...':::;;'.........      ...,xl ...     .;.  ..,..,:;,'....          //
//    ......''',;:codk00KK0Oxolllcc;,:::;'...'::;;,...........    ...:Ko ',       '.  .;kl.':;,,'.....        //
//    ......'',,;:loxkkOOOkdolllllc:;:c::;....,c:;;,...........      oXc ..          ..dXk'.c:;,,''.....      //
//    .......',,;clooddxxdoolccllll::lllc;'....,;;;,'......'....    .oO,            ..;ONO''lc:;,,''......    //
//    .......',,;;:cclooolllcccllll::lool;.......',;c:,...,,,'.......::.           ...:0NO,'lc:;;,,''.....    //
//    ........''',;;:::cccccccllllc:cxkxl,..........,odlc;;;;,,'..  .'.            .,':0X0:,lc::;,,''.....    //
//    ...........',,;;;::::::cllol:cxO0Od,.;,'....   .ck0d;;;,,..    ..           .:l,c0K0:,lc:;;,'''.....    //
//     ..........'',,,;;;;:::cldxocoOKKKO;,oc;....    .okl,:l;'. .   ..    .      ,oc,cO0k;,lc:;;,''......    //
//     ...........''',,,,;;:codkOkodKXXXKc;Oxc,..     .',..,;.....        ..      :o:'ckOx;,cc:;,,''......    //
//      ............''',;:cloxkO00oxXNNNXc:0Oo;. .     ... .   .;'                :l,'lxkd,'c::;,,''......    //
//       ...........'',;:clodxkOK0oxNNWWNccK0d;.';'.  ....      ..                :c''cdxd,'::;;,,'.......    //
//        ..........',;:clodxkOOK0lxNNWWNclXKk:,od:'.......                      .::.':odo,':;;,,''......     //
//          ........',;:ccloxkkO0OldXNNWXloXX0cl00ko,.,::;..                     .;;.':lol'';;,,,'.......     //
//           ......',,;:ccldxxkO0OldXXNNXloNN0dkNNNXo,lkkd:..       .            .,,.';clc'.;,,'''......      //
//            .....'',;::coddxxkOkldKXXNXldNN0kKNNNN0coKK0d;..     ..           ..,'.';cl:..,,'''......       //
//           ......'',,;:cloddxxkxldKKKXKloXN0OXNNNNKldXXKOl'.      ..         .,.''.';:c:..'''.......        //
//           .......'',;:clooddxxxld000K0coXX0OXNNNNKodXKKOo,..     ..         .,.''..,::;..''.......         //
//                                                                                                            //
//                                                                                                            //
////////////////////////////////////////////////////////////////////////////////////////////////////////////////


contract EOI is ERC721Creator {
    constructor() ERC721Creator("Embers of insanity", "EOI") {}
}

// 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
        }
    }
}