// File: contracts/YRE.sol




// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

import "./ERC721Creator.sol";

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//                                                                                                                                                                                                                                                                                                                                                                           //
//                                                                                                                                                                                                                                                                                                                                                                           //
//                                                                                                                                                                                                                                                                                                                                                                           //
//      ___    ___ ___  ___  ___  __    ___  ________                                                                                                                                                                                                                                                                                                                        //
//     |\  \  /  /|\  \|\  \|\  \|\  \ |\  \|\   __  \                                                                                                                                                                                                                                                                                                                       //
//     \ \  \/  / | \  \\\  \ \  \/  /|\ \  \ \  \|\  \                                                                                                                                                                                                                                                                                                                      //
//      \ \    / / \ \  \\\  \ \   ___  \ \  \ \  \\\  \                                                                                                                                                                                                                                                                                                                     //
//       \/  /  /   \ \  \\\  \ \  \\ \  \ \  \ \  \\\  \                                                                                                                                                                                                                                                                                                                    //
//     __/  / /      \ \_______\ \__\\ \__\ \__\ \_______\                                                                                                                                                                                                                                                                                                                   //
//    |\___/ /        \|_______|\|__| \|__|\|__|\|_______|                                                                                                                                                                                                                                                                                                                   //
//    \|___|/                                                                                                                                                                                                                                                                                                                                                                //
//                                                                                                                                                                                                                                                                                                                                                                           //
//                                                                                                                                                                                                                                                                                                                                                                           //
//                                                                                                                                                                                                                                                                                                                                                                           //
//     ▄██████▄     ▄████████ ████████▄   ▄█  ███▄▄▄▄      ▄████████    ▄████████ ▄██   ▄            ███        ▄████████  ▄█   ▄████████    ▄█   ▄█▄    ▄████████    ▄████████ ▄██   ▄         ▄█  ███▄▄▄▄      ▄████████    ▄████████ ███▄▄▄▄      ▄████████                                                                                                               //
//    ███    ███   ███    ███ ███   ▀███ ███  ███▀▀▀██▄   ███    ███   ███    ███ ███   ██▄      ▀█████████▄   ███    ███ ███  ███    ███   ███ ▄███▀   ███    ███   ███    ███ ███   ██▄      ███  ███▀▀▀██▄   ███    ███   ███    ███ ███▀▀▀██▄   ███    ███                                                                                                               //
//    ███    ███   ███    ███ ███    ███ ███▌ ███   ███   ███    ███   ███    ███ ███▄▄▄███         ▀███▀▀██   ███    ███ ███▌ ███    █▀    ███▐██▀     ███    █▀    ███    ███ ███▄▄▄███      ███▌ ███   ███   ███    █▀    ███    ███ ███   ███   ███    █▀                                                                                                                //
//    ███    ███  ▄███▄▄▄▄██▀ ███    ███ ███▌ ███   ███   ███    ███  ▄███▄▄▄▄██▀ ▀▀▀▀▀▀███          ███   ▀  ▄███▄▄▄▄██▀ ███▌ ███         ▄█████▀     ▄███▄▄▄      ▄███▄▄▄▄██▀ ▀▀▀▀▀▀███      ███▌ ███   ███   ███          ███    ███ ███   ███  ▄███▄▄▄                                                                                                                   //
//    ███    ███ ▀▀███▀▀▀▀▀   ███    ███ ███▌ ███   ███ ▀███████████ ▀▀███▀▀▀▀▀   ▄██   ███          ███     ▀▀███▀▀▀▀▀   ███▌ ███        ▀▀█████▄    ▀▀███▀▀▀     ▀▀███▀▀▀▀▀   ▄██   ███      ███▌ ███   ███ ▀███████████ ▀███████████ ███   ███ ▀▀███▀▀▀                                                                                                                   //
//    ███    ███ ▀███████████ ███    ███ ███  ███   ███   ███    ███ ▀███████████ ███   ███          ███     ▀███████████ ███  ███    █▄    ███▐██▄     ███    █▄  ▀███████████ ███   ███      ███  ███   ███          ███   ███    ███ ███   ███   ███    █▄                                                                                                                //
//    ███    ███   ███    ███ ███   ▄███ ███  ███   ███   ███    ███   ███    ███ ███   ███          ███       ███    ███ ███  ███    ███   ███ ▀███▄   ███    ███   ███    ███ ███   ███      ███  ███   ███    ▄█    ███   ███    ███ ███   ███   ███    ███                                                                                                               //
//     ▀██████▀    ███    ███ ████████▀  █▀    ▀█   █▀    ███    █▀    ███    ███  ▀█████▀          ▄████▀     ███    ███ █▀   ████████▀    ███   ▀█▀   ██████████   ███    ███  ▀█████▀       █▀    ▀█   █▀   ▄████████▀    ███    █▀   ▀█   █▀    ██████████                                                                                                               //
//                 ███    ███                                          ███    ███                              ███    ███                   ▀                        ███    ███                                                                                                                                                                                              //
//                                ▄█    █▄    ███    █▄     ▄████████     ███          ▀█████████▄     ▄████████  ▄██████▄     ▄█   ▄█▄    ▄████████ ███▄▄▄▄                                                                                                                                                                                                                 //
//                               ███    ███   ███    ███   ███    ███ ▀█████████▄        ███    ███   ███    ███ ███    ███   ███ ▄███▀   ███    ███ ███▀▀▀██▄                                                                                                                                                                                                               //
//                               ███    ███   ███    ███   ███    ███    ▀███▀▀██        ███    ███   ███    ███ ███    ███   ███▐██▀     ███    █▀  ███   ███                                                                                                                                                                                                               //
//                              ▄███▄▄▄▄███▄▄ ███    ███  ▄███▄▄▄▄██▀     ███   ▀       ▄███▄▄▄██▀   ▄███▄▄▄▄██▀ ███    ███  ▄█████▀     ▄███▄▄▄     ███   ███                                                                                                                                                                                                               //
//                             ▀▀███▀▀▀▀███▀  ███    ███ ▀▀███▀▀▀▀▀       ███          ▀▀███▀▀▀██▄  ▀▀███▀▀▀▀▀   ███    ███ ▀▀█████▄    ▀▀███▀▀▀     ███   ███                                                                                                                                                                                                               //
//                               ███    ███   ███    ███ ▀███████████     ███            ███    ██▄ ▀███████████ ███    ███   ███▐██▄     ███    █▄  ███   ███                                                                                                                                                                                                               //
//                               ███    ███   ███    ███   ███    ███     ███            ███    ███   ███    ███ ███    ███   ███ ▀███▄   ███    ███ ███   ███                                                                                                                                                                                                               //
//                                                                                                                                                                                                                                                                                                                                                                           //
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//     ███▄    █ ▓█████ ██▒   █▓▓█████  ██▀███      ▄▄▄        ▄████  ▄▄▄       ██▓ ███▄    █               ███▄    █ ▓█████ ██▒   █▓▓█████  ██▀███                                                                                                                                                                                                                          //
//     ██ ▀█   █ ▓█   ▀▓██░   █▒▓█   ▀ ▓██ ▒ ██▒   ▒████▄     ██▒ ▀█▒▒████▄    ▓██▒ ██ ▀█   █               ██ ▀█   █ ▓█   ▀▓██░   █▒▓█   ▀ ▓██ ▒ ██▒                                                                                                                                                                                                                        //
//    ▓██  ▀█ ██▒▒███   ▓██  █▒░▒███   ▓██ ░▄█ ▒   ▒██  ▀█▄  ▒██░▄▄▄░▒██  ▀█▄  ▒██▒▓██  ▀█ ██▒             ▓██  ▀█ ██▒▒███   ▓██  █▒░▒███   ▓██ ░▄█ ▒                                                                                                                                                                                                                        //
//    ▓██▒  ▐▌██▒▒▓█  ▄  ▒██ █░░▒▓█  ▄ ▒██▀▀█▄     ░██▄▄▄▄██ ░▓█  ██▓░██▄▄▄▄██ ░██░▓██▒  ▐▌██▒             ▓██▒  ▐▌██▒▒▓█  ▄  ▒██ █░░▒▓█  ▄ ▒██▀▀█▄                                                                                                                                                                                                                          //
//    ▒██░   ▓██░░▒████▒  ▒▀█░  ░▒████▒░██▓ ▒██▒    ▓█   ▓██▒░▒▓███▀▒ ▓█   ▓██▒░██░▒██░   ▓██░ ██▓  ██▓    ▒██░   ▓██░░▒████▒  ▒▀█░  ░▒████▒░██▓ ▒██▒ ██▓  ██▓                                                                                                                                                                                                               //
//    ░ ▒░   ▒ ▒ ░░ ▒░ ░  ░ ▐░  ░░ ▒░ ░░ ▒▓ ░▒▓░    ▒▒   ▓▒█░ ░▒   ▒  ▒▒   ▓▒█░░▓  ░ ▒░   ▒ ▒  ▒▓▒  ▒▓▒    ░ ▒░   ▒ ▒ ░░ ▒░ ░  ░ ▐░  ░░ ▒░ ░░ ▒▓ ░▒▓░ ▒▓▒  ▒▓▒                                                                                                                                                                                                               //
//    ░ ░░   ░ ▒░ ░ ░  ░  ░ ░░   ░ ░  ░  ░▒ ░ ▒░     ▒   ▒▒ ░  ░   ░   ▒   ▒▒ ░ ▒ ░░ ░░   ░ ▒░ ░▒   ░▒     ░ ░░   ░ ▒░ ░ ░  ░  ░ ░░   ░ ░  ░  ░▒ ░ ▒░ ░▒   ░▒                                                                                                                                                                                                                //
//       ░   ░ ░    ░       ░░     ░     ░░   ░      ░   ▒   ░ ░   ░   ░   ▒    ▒ ░   ░   ░ ░  ░    ░         ░   ░ ░    ░       ░░     ░     ░░   ░  ░    ░                                                                                                                                                                                                                 //
//             ░    ░  ░     ░     ░  ░   ░              ░  ░      ░       ░  ░ ░           ░   ░    ░              ░    ░  ░     ░     ░  ░   ░       ░    ░                                                                                                                                                                                                                //
//                          ░                                                                   ░    ░                           ░                     ░    ░                                                                                                                                                                                                                //
//     ▄▄▄        ▄████  ▄▄▄       ██▓ ███▄    █               ▄▄▄        ▄████  ▄▄▄       ██▓ ███▄    █                                                                                                                                                                                                                                                                     //
//    ▒████▄     ██▒ ▀█▒▒████▄    ▓██▒ ██ ▀█   █              ▒████▄     ██▒ ▀█▒▒████▄    ▓██▒ ██ ▀█   █                                                                                                                                                                                                                                                                     //
//    ▒██  ▀█▄  ▒██░▄▄▄░▒██  ▀█▄  ▒██▒▓██  ▀█ ██▒             ▒██  ▀█▄  ▒██░▄▄▄░▒██  ▀█▄  ▒██▒▓██  ▀█ ██▒                                                                                                                                                                                                                                                                    //
//    ░██▄▄▄▄██ ░▓█  ██▓░██▄▄▄▄██ ░██░▓██▒  ▐▌██▒             ░██▄▄▄▄██ ░▓█  ██▓░██▄▄▄▄██ ░██░▓██▒  ▐▌██▒                                                                                                                                                                                                                                                                    //
//     ▓█   ▓██▒░▒▓███▀▒ ▓█   ▓██▒░██░▒██░   ▓██░ ██▓  ██▓     ▓█   ▓██▒░▒▓███▀▒ ▓█   ▓██▒░██░▒██░   ▓██░ ██▓  ██▓  ██▓                                                                                                                                                                                                                                                      //
//     ▒▒   ▓▒█░ ░▒   ▒  ▒▒   ▓▒█░░▓  ░ ▒░   ▒ ▒  ▒▓▒  ▒▓▒     ▒▒   ▓▒█░ ░▒   ▒  ▒▒   ▓▒█░░▓  ░ ▒░   ▒ ▒  ▒▓▒  ▒▓▒  ▒▓▒                                                                                                                                                                                                                                                      //
//      ▒   ▒▒ ░  ░   ░   ▒   ▒▒ ░ ▒ ░░ ░░   ░ ▒░ ░▒   ░▒       ▒   ▒▒ ░  ░   ░   ▒   ▒▒ ░ ▒ ░░ ░░   ░ ▒░ ░▒   ░▒   ░▒                                                                                                                                                                                                                                                       //
//      ░   ▒   ░ ░   ░   ░   ▒    ▒ ░   ░   ░ ░  ░    ░        ░   ▒   ░ ░   ░   ░   ▒    ▒ ░   ░   ░ ░  ░    ░    ░                                                                                                                                                                                                                                                        //
//          ░  ░      ░       ░  ░ ░           ░   ░    ░           ░  ░      ░       ░  ░ ░           ░   ░    ░    ░                                                                                                                                                                                                                                                       //
//                                                 ░    ░                                                  ░    ░    ░                                                                                                                                                                                                                                                       //
//                                                                                                                                                                                                                                                                                                                                                                           //
//                                                                                                                                                                                                                                                                                                                                                                           //
//                                                                                                                                                                                                                                                                                                                                                                           //
//                                                                                                                                                                                                                                                                                                                                                                           //
//     ▄▄▄       ██▓     ██▓        ███▄ ▄███▓▓█████  ███▄    █     ▄▄▄       ██▀███  ▓█████    ▄▄▄█████▓ ██░ ██ ▓█████      ██████  ▄▄▄       ███▄ ▄███▓▓█████               ██▓    ██░ ██  ▄▄▄     ▄▄▄█████▓▓█████    ▄▄▄█████▓ ██░ ██ ▓█████  ███▄ ▄███▓ ▐██▌                                                                                                             //
//    ▒████▄    ▓██▒    ▓██▒       ▓██▒▀█▀ ██▒▓█   ▀  ██ ▀█   █    ▒████▄    ▓██ ▒ ██▒▓█   ▀    ▓  ██▒ ▓▒▓██░ ██▒▓█   ▀    ▒██    ▒ ▒████▄    ▓██▒▀█▀ ██▒▓█   ▀              ▓██▒   ▓██░ ██▒▒████▄   ▓  ██▒ ▓▒▓█   ▀    ▓  ██▒ ▓▒▓██░ ██▒▓█   ▀ ▓██▒▀█▀ ██▒ ▐██▌                                                                                                             //
//    ▒██  ▀█▄  ▒██░    ▒██░       ▓██    ▓██░▒███   ▓██  ▀█ ██▒   ▒██  ▀█▄  ▓██ ░▄█ ▒▒███      ▒ ▓██░ ▒░▒██▀▀██░▒███      ░ ▓██▄   ▒██  ▀█▄  ▓██    ▓██░▒███                ▒██▒   ▒██▀▀██░▒██  ▀█▄ ▒ ▓██░ ▒░▒███      ▒ ▓██░ ▒░▒██▀▀██░▒███   ▓██    ▓██░ ▐██▌                                                                                                             //
//    ░██▄▄▄▄██ ▒██░    ▒██░       ▒██    ▒██ ▒▓█  ▄ ▓██▒  ▐▌██▒   ░██▄▄▄▄██ ▒██▀▀█▄  ▒▓█  ▄    ░ ▓██▓ ░ ░▓█ ░██ ▒▓█  ▄      ▒   ██▒░██▄▄▄▄██ ▒██    ▒██ ▒▓█  ▄              ░██░   ░▓█ ░██ ░██▄▄▄▄██░ ▓██▓ ░ ▒▓█  ▄    ░ ▓██▓ ░ ░▓█ ░██ ▒▓█  ▄ ▒██    ▒██  ▓██▒                                                                                                             //
//     ▓█   ▓██▒░██████▒░██████▒   ▒██▒   ░██▒░▒████▒▒██░   ▓██░    ▓█   ▓██▒░██▓ ▒██▒░▒████▒     ▒██▒ ░ ░▓█▒░██▓░▒████▒   ▒██████▒▒ ▓█   ▓██▒▒██▒   ░██▒░▒████▒ ██▓  ██▓    ░██░   ░▓█▒░██▓ ▓█   ▓██▒ ▒██▒ ░ ░▒████▒     ▒██▒ ░ ░▓█▒░██▓░▒████▒▒██▒   ░██▒ ▒▄▄                                                                                                              //
//     ▒▒   ▓▒█░░ ▒░▓  ░░ ▒░▓  ░   ░ ▒░   ░  ░░░ ▒░ ░░ ▒░   ▒ ▒     ▒▒   ▓▒█░░ ▒▓ ░▒▓░░░ ▒░ ░     ▒ ░░    ▒ ░░▒░▒░░ ▒░ ░   ▒ ▒▓▒ ▒ ░ ▒▒   ▓▒█░░ ▒░   ░  ░░░ ▒░ ░ ▒▓▒  ▒▓▒    ░▓      ▒ ░░▒░▒ ▒▒   ▓▒█░ ▒ ░░   ░░ ▒░ ░     ▒ ░░    ▒ ░░▒░▒░░ ▒░ ░░ ▒░   ░  ░ ░▀▀▒                                                                                                             //
//      ▒   ▒▒ ░░ ░ ▒  ░░ ░ ▒  ░   ░  ░      ░ ░ ░  ░░ ░░   ░ ▒░     ▒   ▒▒ ░  ░▒ ░ ▒░ ░ ░  ░       ░     ▒ ░▒░ ░ ░ ░  ░   ░ ░▒  ░ ░  ▒   ▒▒ ░░  ░      ░ ░ ░  ░ ░▒   ░▒      ▒ ░    ▒ ░▒░ ░  ▒   ▒▒ ░   ░     ░ ░  ░       ░     ▒ ░▒░ ░ ░ ░  ░░  ░      ░ ░  ░                                                                                                             //
//      ░   ▒     ░ ░     ░ ░      ░      ░      ░      ░   ░ ░      ░   ▒     ░░   ░    ░        ░       ░  ░░ ░   ░      ░  ░  ░    ░   ▒   ░      ░      ░    ░    ░       ▒ ░    ░  ░░ ░  ░   ▒    ░         ░        ░       ░  ░░ ░   ░   ░      ░       ░                                                                                                             //
//          ░  ░    ░  ░    ░  ░          ░      ░  ░         ░          ░  ░   ░        ░  ░             ░  ░  ░   ░  ░         ░        ░  ░       ░      ░  ░  ░    ░      ░      ░  ░  ░      ░  ░           ░  ░             ░  ░  ░   ░  ░       ░    ░                                                                                                                //
//                                                                                                                                                                                                                                                                                                                                                                           //
//                                                                                                                                                                                                                                                                                                                                                                           //
//    All Copyright and Arts are reserved. 2022 @ValgrimReos & @Virium Labs                                                                                                                                                                                                                                                                                                  //
//                                                                                                                                                                ░    ░                                                                                                                                                                                                     //
//                                                                                                                                                                                                                                                                                                                                                                           //
//                                                                                                                                                                                                                                                                                                                                                                           //
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


contract YRE is ERC721Creator {
    constructor() ERC721Creator("Yukio", "YRE") {}
}

// 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: 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 v4.7.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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