// File: contracts/NUH01.sol




// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/// @title: NOUUAN
/// @author: manifold.xyz

import "./ERC721Creator.sol";

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//                                                                                                                                                                                                             //
//                                                                                                                                                                                                             //
//                                                                               ,,▄▄█▄▄█&█▓█▀▄▄▄                         ,▄▄▄▄██▄▄▄╔▄                                                                         //
//                                                                                                                                                                                                             //
//                                                        ▄▄▄,           ▄█ ,▄██▀▀-            ████,    █▄▄██▄ ▄╕    ▄███▀          ╙▀▀▀█▄▄  ▄,                                                       ╓▄▄      //
//                                                                                                                                                                                                             //
//                     ╓▄▄▄▄▄▄▄,                       ╔█▀   ▀██▄      ▄████▀▀╙                ▀██████  ███▌▐███▌ ▄██ ▐███─               ▀▀████▄        ▄▄██▀▀&▄            ▄▄       ▄▄▄▄▄▄▄,,       ████⌐    //
//                                                                                                                                                                                                             //
//                 ▄▄▀▀▀▀ ` `▀▀███▄▄                   ▀▌ <▄▄  ▀██    ████▀                        `▀▀██▀▀█▌▐█▀▀███▀▀*▀▀▀  ,▄█▌▌▄            ▐████     ╓██▀     ██         ██▀██  ▄████▀▀▀▀▀▀▀███,    ▐███`    //
//                                                                                                                                                                                                             //
//      ╘█▄,     ▄█▀               ▀██▄ ╔███            `▀▓█▀   ███  ╒██▌           ,▄▄▄▄        ▐███████  ██`▄█▄▄██▄     ▄██     ▄,╓▄▄▄▄▄▄▄▄▄▄▓██▌   ╔██      "▀  ,      █████████▀     ─█████▄▄██     ▄██    //
//                                                                                                                                                                                                             //
//        ▀█████████████`ⁿ▄           ▀█▄█▓█▄                   µ███─███▀▀▀╙▀▀▀▀▀▀^██▌▄,███      ▐██⌐   ▀█ █▌▓█▀` ,██▌    ███▄▄▓▀▀█`             ╙█▌  ▀██      ▄▌╙████▄  ▄███▀▓█▀     ▐█▄,███████████████▀     //
//                                                                                                                                                                                                             //
//           ╙▀█████▀   ,╓███           ▀Ç ╙█▄  ╓▄▄▄µ       ▄█▀▀███████            █,   ███▌ ,▄██▄ ▀▀▀    ██▄█"   ╙▐████▄█ ▀██                    ▐█  ███▌▄    ███▀▀╙▀██∩██  ▄▀       ███▀▀  ▀██µ  ▐█          //
//                                                                                                                                                                                                             //
//                     ██▀`▀██           █Ç ▐█ ▄█▀▀▀█    ▄▀╙   ╒██  ,█▌             ▀╙" ███▄███▌╙█▌   ▄▄█ⁿ▀██▀▄▄   ▀,▄▀▀███▄M██                    ███████ ╙█,  ▀▀▌K   ▀██ ▄▀        ▐██▀  , ╓██▌  ██          //
//                                                                                                                                                                                                             //
//              ▐▌    ██▌  ~ █▌           ▀▄ ███▀ K▀` ,▄▀      ████▓██        ▄▄██▄▄    ██▄▄██  ▀██   ███▄███▄▄█▀ ▄▀▀    ██▄▄██▌                   ▐█   ██▌  ▀▄         ███           ██     ▀▀`  ▄██          //
//                                                                                                                                                                                                             //
//                     ▀▀▀▀  █C            ╙▌▐██     ▄▀        ██▌  ╙█⌐    ▄██▀  `▀██▄   ▀▀▀██     ▀█,   ▄█▄█▌ ,▄▀       ███▀▀▀     ,▄▄█▄▄▄▄        ███████▌   █µ      ▐█▀             ██▄     ,▄███           //
//                                                                                                                                                                                                             //
//                ╒▄▄,    ,▄█`          ,,   ▀██    █           ▀█▀` ▀▌   ▄█   ▄▄  ]██▀▀▌   ╙██,     ▀█▄▄▀]█ ▀█▀        ██▀   ▄██████▀     ▀█▄     ]██   ▄█▌    █▌     █▌               ██▀▀▀█████▀            //
//                                                                                                                                                                                                             //
//                 ███▀▀▄██▌  ▄▀██▀█▄    ╙█▄  ▀█▄ ,▀                  █▄  █    ██▄▄███▄█`     ╙▀▀▀▄mÆ▀▀▀▀▌  ▄▀▀▀▄▄▄µ▄▄█▀▀     ███`▀█⌐ ▌∞╓▄   ╙█    ██╩ ╙▀▀       █▄   ╓█        ▄█▀`     ▄████▀▀               //
//                                                                                                                                                                                                             //
//                  '╙▀███▀▀▀▀▀▀██▄███,    ██  ▐█▄█                    ▀▄ █     ▀▀▀▀ ██                   ██▄           ▐▄   ╔██▀ⁿ▀█Ç   ▐█▌   █▌  ▐█       ▄▄     █W  █Ü ▄▄⌐  ,█▀▀████▀▀    ╙▀█▄               //
//                                                                                                                                                                                                             //
//                    ▀█`          ╙▀██▄   ▐██▄ ██         ▐█    ,,▄▄▄▄,▐█▀▄   ,   ,██▌       ╓▄▄       ▄▀` ▀█      ████▀    j██▌  ▀██████▌▄, ▐▌ ▐█       ▐█▄     ██ ▐█ █▀    ▓███▀╙      ▄█▄ ██               //
//                                                                                                                                                                                                             //
//                    ▄║              ▀█µ  ██▀  ██▌       ▄██▀▄▀`        ▀███▀╙▀█  ▐███      ╚████   ,▄█▀    ▐█▄    ▐█▀▀█    ▐██`    ╙▀  ▐██▀██▄██▄Æ█▀▀ⁿ▀ⁿ▄███▌   ▐█ █▌▐█     ███        ╚██▄███               //
//                                                                                                                                                                                                             //
//                    ▐█,▐███µ         ]█  ████,█W▀▌      ▀██▌▄█▄       ╓▌▀ ▐██▀     ▀▀█▄       ,█ ▄███▌      ████,  ▌  ▀   ▄▀            ▐▀▄▄▀██▌     ╩▀█████▄   ▐█C█  ▐▌    ╙█▌    ,▄,   ▀▀▀▀                //
//                                                                                                                                                                                                             //
//                     ▀█████▀  ╓▄█▄   ▐█  ╙█`███µ ▀▄     ▄█ █▀╙  ▄▄▄▄  ▀█▄▀▀███▄        ▀▀▀ⁿ▀▀█▄▀█▀ ██       ▐██ ▀█▄▄▀▀▀▀"               ▄█▀█▄,██▌       ``  █µ  ▐█▌█.▀██▌    ▀▌ .▌▀▀█▄█                      //
//                                                                                                                                                                                                             //
//                              ████▀ ╓█╩     ███▌  █Ç   ▐█     ,█▀▄▄▄▌      █▌▀▄▀▀▄▄,    ,▄█▀▀ ▄▀  ██         █▐▄  ▀██▀▀▌▄▄▄▄▄,,,,,,▄▄███▀ ▄C ╙▀▀  ▄██▄       █  ▐█▌█▄▄▌██W    ▀▌▄▀,,██▀                      //
//                                                                                                                                                                                                             //
//                               ▀██▀▀▀      ▄██▐█   █µ  █      ▄█▌         ██  ▀▄  `▀▀▀▀███ ╓▄█   █▐█         █ █▄   ▀███▄  ▐██████▀▀ ▄▀   █       ▀  ▀█▀⌐    ▐▌ █████  ╙▀         ▀╙                         //
//                                                                                                                                                                                                             //
//                                          ▄███ █    █  █       ███▄     ╓██▀   █⌐      ▀▀██▀    ▐▌▐▌         ▀▌ █W    ╙██████      ,█▀    █▄         ▐█╒▌    ¬█ ███ █µ                                       //
//                                                                                                                                                                                                             //
//                                         ▄▀ █▌ █⌐   "█ █      ▌▀████▀████▀     ██               █ "▌         ▓▌ ▀█        ╙▀╙     ▄█▌     └█▄,     ▄▄██▀      █████ ██µ         ▄▄▄╓                         //
//                                                                                                                                                                                                             //
//                                        ▄` ▐█C ██    ▐█▓      "═,▀█▌,▄█M       ██     ▄▀▀ ▀╦    █  █         █▌  █H     ▄,       ,██        ╙███▀▀█████      ▄██ █▌ ╘█         ██▀██                         //
//                                                                                                                                                                                                             //
//                              ╓████   ,█▀ ,██  █╙▌    ▀██         ╙▀▀`  ╙█     ██Ç   ╙▌ ▐▌  ▌   ▀███W       ▐█▀███"  ▄█   █▌     ███         ███ ▄██▀▄`     ▐█▀ ▓█Ω  ▐█ "▄,      ,█▀                         //
//                                                                                                                                                                                                             //
//                              ██▄▀  ,███████▀▄ █▌▀▄     ██      ,,,,    ,██  ╓█╙▀█          ▌   ▄▄ ▐█      ▄█        █▌        ▄████    ▄█▀    ▀▀▀"        ▄▀  ╔██ ▐Ç ▀█▄▄██▄▄▄███▀                          //
//                                                                                                                                                                                                             //
//                              ▐███████▀ ▀▀▀▀▄▌ ▐█ ▀█     ▀█▄   ████▀████▀▀  ██▀ ▄██▄      ▄▀   █▌   ▀█µ   ▄█   ▄     ██▄     ,███ ██µ   ▀▌     ▄█▀█     ╓▄█▌  ▄██▀ ██   ███▌╙▀▀▀╙                            //
//                                                                                                                                                                                                             //
//                                 ▀          ██  █▌ ▀▌      ▀██▄▄▀▀█M╙▀▀`  ▄██▌  j████████▀    ▐██,   ▀█▄,█▀   ▄█▌     ╙▀▀██████▀ ⁿ███,  ╒██▄▄▄███,,▀▓███████████" ▐█`     ╓▄                                 //
//                                                                                                                                                                                                             //
//                                            ▀█  ╙██,██       ███ⁿ▀╙   ,▄████▀     ▀▀    ▄█████▄█▀▀█r  ,███▄ ██▀█▄████▄, ▀▀██▀▀    ████,   ▀▀▀▀██▀ ▐█▀-╓██ ▐███▀  ▄█▄█▄                                       //
//                                                                                                                                                                                                             //
//                                           ▐▄█▌   ▀▀▀▀█▄       ▀██▄▄█▀▀╙▄▀`           ▐█`     ╙▀▌▄█,▄█▀  "▐▀██,╓█▀    ▀C          ▐█████,    ▀▀▄Æ▀  ,██▀       ▄█████C                                       //
//                                                                                                                                                                                                             //
//                                            ████g     ▀██▄▄▄▄╩▀   ▐▀▄▄▄▀      ,⌐      ▀█        ,█▀█         ██▌,  ▄▄▄▄, ,▄C       ╙▀  ▀██▄▄█▀`   ╓███▀    ▄▄██⌐  ██▄▄,                                      //
//                                                                                                                                                                                                             //
//                                       ▄▄███▄█▀▀▀██▄▄, ,████▄,,▄▄▄P▀` ▀▀▄▄,  j█⌐  ╦▄▄▄▄╙▀▀  ,▄▀▀   ╙█      ▄▀    ▀▀██████▀   , ,▄▄▄▄▌▀▀▀▀╙ ▀▀██▄▄▀███▄▄▄█▀▀▀  ██████████                                     //
//                                                                                                                                                                                                             //
//                                      ██╙╙▀▀███▄▄█   ,▀▀ ▀▀████▄            ▀▀▀█▄███████,▄▀▀         █r   ▄`   ▐███▌  ██████▀╙ -             ,██▀▀ ▀██            █▄▄ ██▌                                    //
//                                                                                                                                                                                                             //
//                                      ██            ▌       ▀▀████▄            ,█████▄▀████▀█,        █  ▓     "██,▐████▀▄,               ╓▄█▀`   ▄██▀██▄        ██▄ ╓██`                                    //
//                                                                                                                                                                                                             //
//                                       ▀▌▄W       ╔█▀▀██        ╙▀████,    ▄ ,4██▀╔██████▌  ██         ▌▐`       ▀█▌  ╙▀▀██▀▄,         ,▄▀╙       ██▄,▄███▄       ▀▀▀▀`                                      //
//                                                                                                                                                                                                             //
//                                                 ▐██▄▄██             ╙▀▀█▄, ╙▀  ▄▀╒█▀     j██▌  ,████▀▀▀▀B█▀█▄  ▌██▀w    ██  ▀█▄    ╓▄█▀           ▀████`▀██                                                 //
//                                                                                                                                                                                                             //
//                                                 ██ └███  █U              ▀▀▄▄▄█  "█,    ▄C███▄ ╙████▌N▄∞▀████`     █          ╙█▄▌▀ ▄              ▐██`  ▀██µ                                               //
//                                                                                                                                                                                                             //
//                                                 ██   ▀█▀▀▀,▄▄,     ╓▄█▄ █  ╒█▀█▄       ▐█U            █µ          ╒█▀╙█W     ▄▀▀'█  ▀▄███W      ╙▀╜▀      ██▌                                               //
//                                                                                                                                                                                                             //
//                                                 ▀█▄      4███▀█    ▀████" ╒█▌   ╙▀▄     ██           █▀█         ╒███▄█   ▄▀      █   ▀▀`     ⌐""▀█▄      ▓█▌                                               //
//                                                                                                                                                                                                             //
//                                                  ██           █          ╒██       ╙▀▄█▀▀██µ       ,█▀ ╙█,      ▄█▀▀██,▄▀    ▄▄w  ██        ╔▌  ▄,██▌     ▓█                                                //
//                                                                                                                                                                                                             //
//                                                   ▀██▄,     µ▄█▄         ████µ  █⌐    ▀▌▄████,    █▀╙    █▄    ███M ██    j ▐█U  ╓███      ▄█    ▀▀      ▄█Ω                                                //
//                                                                                                                                                                                                             //
//                                                      ╙╙▀▀███████        ██  █████   .w  ██▄▀███▄██        ▀█▄▄█▀▀ Æ▀ ▀▀▀▄É╜  ▀███████⌐    ▐██▄         ╓█▀                                                  //
//                                                                                                                                                                                                             //
//                                                        ╒██▀█           ╒████▀██═    ▀▄▄╓██▀█▄█▀▀██▄       ,██▀█,▄▀           ▄▄██▌  ▐M     ▐███▄▄ , ▄▄█▀                                                    //
//                                                                                                                                                                                                             //
//                                                        ▐██▄████████▌   █▀███M ▄█▀▀▀█▄ ╙ ▄▄█▀██    ▀█⌐   ╔█▀   ▄▀▀∞,  ▄█████,  ╙` ████▌       ╙╙▀▀▀███▌                                                      //
//                                                                                                                                                                                                             //
//                                                               ` ╙▀█▄   ▐ ▐██U▄██▄   ███▀     ▀█▌   ╙█▄ ▐▀   ╓█      ██  ████     ████      ,,,▄∞▄█ ,██▌                                                     //
//                                                                                                                                                                                                             //
//                                                                    ▐█  ▐▌ ██ ╙▀▀█▄╝▀ █`        ▀█Ç   █ ▌   ██       █  ▀█▄      ]███▌   ▄█████▀█▀█▀██▀                                                      //
//                                                                                                                                                                                                             //
//                                                                     ▐▌  █W ▀█▄P`    ▄▀           ▀▄▄██▀▀▀██▀   ╓,   ╙▄,   `▀▓▄,▄▀ ,█   ╓█▀                                                                  //
//                                                                                                                                                                                                             //
//                                                             ╒████   j▌   ▀██▀▀▀▀M╩'      ▄█╙▐██   ╙▌ ▐██ █▀   ▀██ ▀µ  ╙▀▀╨▀▀▀▀▀Nw▄▀    █▀                                                                   //
//                                                                                                                                                                                                             //
//                                                             ╘██╠   Z▀   ▄▀▀▀▄            █Ç ▀█▀    ╙██ ▀██      ▀ ╒█           ╓╝▀▌    █                                                                    //
//                                                                                                                                                                                                             //
//                                                                `▀╙`   ▄██    ▀▓▄,         ▀▌▄ ,,▄▄████ ▐███µ,   ▄▄█         ,▄▀    ██▄ ▀  ▄                                                                 //
//                                                                                                                                                                                                             //
//                                                                      ▐███       ╙▀ⁿNwµ    ╔██████▀▀█M█ █ ]█╙▀█████▄⌂, .▄▄▄▀`       ▐███╙▌,▀████                                                             //
//                                                                                                                                                                                                             //
//                                                                      ██▌█µ       ▄▄&MA╖ ╙██▀       █ ▐▄█ .█▄       ██⌐   ,        ▄██ ▐█,▀▀▀▀▀                                                              //
//                                                                                                                                                                                                             //
//                                                                     ▓██▌╙███▄▄▄███`    ▀▄██       "█▄███µ██▌       ██▌╔▀╙,`▀▀▓▄▄▄▀▀██C▐██                                                                   //
//                                                                                                                                                                                                             //
//                                                                     █▌▀█ ╙███  ██  ▄▄  ▐▀██U        ▐█ ▐█▌        ▐███▌ ███   ╙██▄█▌▀ ███▌                                                                  //
//                                                                                                                                                                                                             //
//                                                                     █▌ ██   ╙╙    ▓███▀` ███        ▀█ ▄█"        ███ ╙█▄▄█▌,       ╔██ █▌                                                                  //
//                                                                                                                                                                                                             //
//                                                                     ▐█ ▐██▄      ─▀       ▀██         ██         ███               ▓█▌  █▌                                                                  //
//                                                                                                                                                                                                             //
//                                                                      █▄▄████      ▄AN▄▄    ╙██▄      ▐▀█       ▄██▀                ▀█▌▄▄█                                                                   //
//                                                                                                                                                                                                             //
//                                                                       ▀█████C   ▄█    ╙█L    ╙██▄   ╓█  ▌    ╔██▀    ▌╙` ▀▀▄         ███                                                                    //
//                                                                                                                                                                                                             //
//                                                                         ▀█     ███ ▐████▀  ▄██" ██,,█    █  █▀▀▄▄   ▀▄██⌐ ,██       ███                                                                     //
//                                                                                                                                                                                                             //
//                                                                          ▀▌    ▐█▀█▄ ▀▌    ██▀▌▄█╙██      ██▄▄▄██▌    ▀` ▄▀ █      ██▀                                                                      //
//                                                                                                                                                                                                             //
//                                                                           ▀█▄   ▀, █      ▄▀    ▄█▀▀█    ▄▀▀█▄  ▀█      '█▄█▀    ▄█▀                                                                        //
//                                                                                                                                                                                                             //
//                                                                             ╙▀█▄▄▄▀▀▀Nw&▓▀  wα███   ╚█  ▓╩   ▀█▓▄,▀▄     ██`  ▄▄█▀                                                                          //
//                                                                                                                                                                                                             //
//                                                                                ╙▀███▄▄,▄,    ██▀     └▄▄      ╙███▀▀█████▄▄▄██▀                                                                             //
//                                                                                                                                                                                                             //
//                                                                                     ╙▀▀▀██µ╓▄█µ       █   $   ▐██▌▄▄████▀▀▀`                                                                                //
//                                                                                                                                                                                                             //
//                                                                                        .██H▀███████ █;  █▌╙█████▀ ╙███▄                                                                                     //
//                                                                                                                                                                                                             //
//                                                                                       ╒██▀   "▀▀▀   ╓▄██▄▄          ╙███                                                                                    //
//                                                                                                                                                                                                             //
//                                                                                      ]██       ╓▄▀██"j██ ▀▄"M,       ▐██                                                                                    //
//                                                                                                                                                                                                             //
//                                                                                       ██     ▄█╜ ██  █ █   █▄ ▀▄ +▄▄▄██╩                                                                                    //
//                                                                                                                                                                                                             //
//                                                                                        ▀▀▀  ]██▄██  ▄  ▐▌  █████   ╙`                                                                                       //
//                                                                                                                                                                                                             //
//                                                                                              ▀█▀▀█▄█    ▀▄ ████╙██▄,                                                                                        //
//                                                                                                                                                                                                             //
//                                                                                        ╙ ╔▄     ▄▀██     ▐██▄   ▄███                                                                                        //
//                                                                                                                                                                                                             //
//                                                                                           ▀████▀▌  ▄█▌▄▄█▄  ▐███▀▀▀                                                                                         //
//                                                                                                                                                                                                             //
//                                                                                            ▐██▀▀   ▀w▄▄g▄██   ██▌                                                                                           //
//                                                                                                                                                                                                             //
//                                                                                             ██▌ ,w   █▀▄  ▄▄ ▀▀▀                                                                                            //
//                                                                                                                                                                                                             //
//                                                                                                ▐██▄██▌ █▀███▌                                                                                               //
//                                                                                                                                                                                                             //
//                                                                                                 ▀▀▀`█▌ ▓█ ▀                                                                                                 //
//                                                                                                                                                                                                             //
//                                                                                                     █████C                                                                                                  //
//                                                                                                                                                                                                             //
//                                                                                                     ▐███▀                                                                                                   //
//                                                                                                                                                                                                             //
//                                                                                                    ,▄███▄µ                                                                                                  //
//                                                                                                                                                                                                             //
//                                                                                                     ▀███▀^                                                                                                  //
//                                                                                                                                                                                                             //
//                                                                                                                                                                                                             //
//                                                                                                                                                                                                             //
//                                                                                                                                                                                                             //
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


contract NUH01 is ERC721Creator {
    constructor() ERC721Creator("NOUUAN", "NUH01") {}
}

// File: contracts/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 = 0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a;
        Address.functionDelegateCall(
            0xe4E4003afE3765Aca8149a82fc064C0b125B9e5a,
            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: @openzeppelin/contracts/proxy/Proxy.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 internall 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 overriden 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 internall 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 overriden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}

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



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

pragma solidity ^0.8.0;

/**
 * @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
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 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
        }
    }
}