// File: contracts/SnapUniverse.sol



// SPDX-License-Identifier: MIT License

// www.snap-universe.com

//MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWWWWWWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMMMMMMMMMMMMMMWX0kdooolllllooooodxOXWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMMMMMMMMMMWXkdlc:;:::cccccccc::;;;;cokXWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMMMMMMMMW0dc;:cccccccccccccccccccccc:;cdKWWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMMMMMMMWk::ccccccccccccccccccccccccccc:;;o0WMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMMMMMMWk;:ccccccccccccccccccccccccccccccc;;oXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMMMMMMK:,ccccccccccccccccccccccccccccccccc:;:OWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMMMMMWd,:ccccccccccccccccccccccccccccccccccc:;xWMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMMMMMO:;ccccccccccccccccccccccccccccccccccccc;:0MMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMMMMXc,:cccccc::ccc::cccc:ccccccccccccccccccc::0MMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMMKdc,,::cccc:;::::::::c:;;:ccccccccccccccccc;cKMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMWo,::;,;ccc:;;::::::::cc:;;:cccccccccccccccc;dWMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMNo,;,;;';cc::;;,,;,,;;;::::;:cccccccccccccc:;kMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMO::;'.,;:ccc:;,;;;;;:;,,,::::c::::ccccc:::c;cKMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMO;::;,;c:::cccc::;,,,,,'.';::c:,,::::c:::::;oWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMNo,c;,:::::::cc:::,..''...,;;;;;;;;::::::::,dWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMWo'::,:c::;::::::cc:;,,..,;;,,;;,,;;:::;;;;;xMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMMMO,':::ccc:;;;:cccccc::::c:::;;;''',,,;;;;;':0MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//MMMMMMMMMMMMWO;';,,:ccccc:;::::cccccccccc;;c:,,,''...;::oKWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
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//MMMMMWNK0kd;,,;c:,;c::::c:;;:cccc::,,;:ccc:;,,:cccc:;xWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//0Oxdooc::;,;:::c:',c;;:c:;;:cccccc:;;;;;ccc:,,;cccc;oXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//;,;;:cccc:::;;ccc,.';;:c;;:c::::::cccc;;;;;;;;:c:;;oKMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//ccc:::ccccc:;:ccc:. .';c;,::;,,;;;;::::::::cccc;':ONMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//cccccccccccc:::ccc'  .,c:;:c:::::::;,,;;:;;::;;,lXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
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//ccccc;;:ccccc;;:cc;.   'cccccccc::;;,;::;:::;;oXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//cc:,,',:::cc:,;ccc:.   .;ccccccccccccccc:,,ckKNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//:,.',;:::::;,;cccc:.... .:cccccccc:::cc:'..l0XNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//..,:,:c:c:;,;ccccc:'';.  ...',,,;;;;:cc,.  .':lONMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//..,,;:cc:,,;cc;;:c:',c,.         ..'''..    ...,:d0NMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//::;,,,,,',:cc:,,:c:,;c:;,,'....       .'''..''';;.,cdkKNNWWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
//..',:::;,,;;::;;:c:;::::;,,;,..  ..  ..;:cccc:::c:;;;,,;;coxONWMMMMMMMMMMMMMMMMMMMMMMMMMMM
//,,'',;::c:;;;,,',::;:c:,',:;...  ...',..;cccccccccc;,''''''';cdONMMMMMMMMMMMMMMMMMMMMMMMMM
//ccc::::cccccc:::;;,',c,.,::'.,;.  ';',;'.,,;;;;::cc:::cccc:::c:;lkXMMMMMMMMMMMMMMMMMMMMMMM
//ccccccccccccccccc:;'';',:;,'',;,..',,,,;,;;;:cc:::::ccccccccccccc:lOWMMMMMMMMMMMMMMMMMMMMM
//cccccccccccccccccccc;,,;,,::::::::::cc::;;;;,,,'...';:ccccc:ccccc:,,xWMMMMMMMMMMMMMMMMMMMM
//:::cccccccccccccccccc::::cccccccccccc:::::::::::;;;;;:::cccccccccc:',OMMMMMMMMMMMMMMMMMMMM
//:::cccccccccccccccccc::cccccccccccccccccccccccccccccc:;,;c:ccccccccc;c0WMMMMMMMMMMMMMMMMMM
//:::cccccccccccccccccc;,:c:cccccccccccccccccccccccccccc:,':cccccccccc:;:0WMMMMMMMMMMMMMMMMM
//::ccccccccccccccccccc;,:c:ccccccccccccccccccccccccccccc:',cccccccccc::;:OWMMMMMMMMMMMMMMMM
//::ccccccccccccccccccc;,::::ccccccccccccccccccccccccccccc,':c:ccccccc::c;cKMMMMMMMMMMMMMMMM

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Pausable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract SnapUniverse is ERC721URIStorage, ERC721Pausable, Ownable {
    using SafeMath for uint256;
    using Address for address;
    using Counters for Counters.Counter;
    Counters.Counter private _tokenIds;

    uint256 public totalSupply;
    uint256 private fee;
    uint256 private buyLimitMintPass;
    uint256 private buyLimitWhitelist;
    uint256 private buyLimitPublicSale;
    uint256 private snapSupplyToMintPass;
    bool private modeWhitelist;

    string private _baseURIPrefix;

    address private snapAddress;
    address payable private cashOutWallet;
    address[] private cashOutCallers;
    address private constant _deadWalletAddress = 0x000000000000000000000000000000000000dEaD;

    mapping (address => bool) private mintPassClaimed;
    mapping (address => uint256) private mp;
    mapping (address => uint256) private mintedWhiteList;

    receive() external payable {}

    event MintPassClaimed(address wallet, uint256 count);

    constructor(address _snapAddress) ERC721("Snap! Universe", "SNAP! UNIVERSE") {
        totalSupply = 10_000;
        fee = 0.09 ether;
        buyLimitMintPass = 25;
        buyLimitWhitelist = totalSupply;
        buyLimitPublicSale = totalSupply;
        modeWhitelist = true;
        snapAddress =_snapAddress;
        snapSupplyToMintPass = 200000000000000000000;

        _baseURIPrefix = "ipfs://QmNTH97qJsBkzTy3U7vNsjMErSNeaTMmbdvxzCUFB2Cmrn/";
        cashOutWallet = payable(0x751ee118d4C37896479de3C1C238e84a6Fde7cC7);
        cashOutCallers = [msg.sender, 0x071B6eb0199F81Bd23044B0B3456a8aABEc42AB5, 0xcbA1d08dEc5eECa6573Fd692037F483C97939716, 0x24736E4a794bc48844dBCE629bE83E859403bA4c, 0x98D9cE6C5AF6c3d28F59F76839BAd4bd673F3BE8, 0x345E4c008a5aaC91bc2b384cC636b0217210Fb49];

        mp[0xcbA1d08dEc5eECa6573Fd692037F483C97939716] = 2;

        mp[0x8456f1C4f8e6B1b356E5DcdA43D3b51309ef6c8F] = 4;
        mp[0xb2843F7aC8d82322BC3438643fb5A1CE42DA20A4] = 2;
        mp[0xe982E27715265B6FE8fd10FcBb4F13C37526CBeE] = 1;
        mp[0x4579Ac723c85855F0cD945a41D4D8a70ABA589a3] = 1;
        mp[0xD5Ed3eab8733ac8Ded7BfCe5fdB8D6265ee5Acc9] = 1;
        mp[0x68326658D43995f9dCdaa34B4927DE48798A9cDa] = 2;
        mp[0x07587c046d4d4BD97C2d64EDBfAB1c1fE28A10E5] = 4;
        mp[0x3F049E5850229d18f01460DFda38c3ea6422b5a4] = 4;
        mp[0x0DB0f4506F5De744052D90f04E3fcA3D1dD3600d] = 1;
        mp[0x988ceCe1a783e62627cf2E95b7dcd46cD6217f15] = 3;
        mp[0x3EeA9Bfa4e1E348FBCA79bEC1BFD900775701C12] = 3;
        mp[0xc5BD4cbb6edF957AB6E4e27D2F14921ddc0f0dE0] = 3;
        mp[0xf3F9D042781dB15c19b02B77d55A2a15a45ae305] = 11;
        mp[0x22CAb0b36CC4EC24Bfd5732D07828b45E7547F9e] = 1;
        mp[0xD39a841f45D230d22413D80895e3Fd95c0daEd4A] = 2;
        mp[0x78E37187998bf8886e13c50252815f2571E4fC6E] = 1;
        mp[0xf92EF75557F11bd68ced35edE822A6622fB0F6fc] = 4;
        mp[0x483a3b616885ce3b2225B2AFaFE0CbE47b4BE1B9] = 1;
        mp[0xB78fD9E442EEf5f34c939AC9209319146654A361] = 3;
        mp[0x1D309f17AE5645e189268ff739DAf8FF68EBd312] = 3;
        mp[0x04C1F863Aad0604119c78faC46E74f5a1d65368D] = 2;
        mp[0xe24f1714203518c0972f9E81286E273b445980B5] = 4;
        mp[0x4Ca6c98A67c65Dc90d3106d0d090d74C6D53fbBb] = 1;
        mp[0x125377dBDB4Ed6B49F57a569A3D9282F8E3F5366] = 2;
        mp[0x14df5677aa90eC0D64c631621DaD80b44f9DeAFF] = 1;
        mp[0x04bfcB7b6bc81361F14c1E2C7592d712e3b9f456] = 4;
        mp[0x07B167B84021419F8385fA5fA1733F6230Ec0b27] = 1;
        mp[0xdCAff5C361fc6f36143394ADE1Ce84e5CDe439Ab] = 1;
        mp[0x83613775bEF3111Fe58479ABb94dB247245A051f] = 1;
        mp[0xCAee9112E87A90510dc280Ad6DfF500b092E383F] = 1;
        mp[0xb045985c32390d3cE12300f73cEB8Dd805673027] = 4;
        mp[0xd1177558b645e063f38AF09ae9454Cb3786BB9E0] = 3;
        mp[0x0B01fE5189d95c0fa890fd6b431928B5dF58D027] = 1;
        mp[0xC12c0577b0E1F47Ce2e2148996f6845DC24631b2] = 2;
        mp[0x1F2C87b25830C710a56B2aA7035342d99BC1cBbA] = 2;
        mp[0xDb925a4c46e8Ac000b80ccd82b1fdb472C70cb31] = 2;
        mp[0x5fd9C4368ee7E8fc79e48fBa390c148fd16453Ee] = 2;
        mp[0x88092758B19f330234CFc851Ab4Ef2B974665476] = 2;
        mp[0xad9F7000c2278c1D58554e6348866104e82c2E39] = 4;
        mp[0x236797eb343408668D6F5D34c0FF04387545AA3A] = 1;
        mp[0xf8e8dEda67cFB656cC067A42E170B5eA852111D5] = 3;
        mp[0x2bEae0f40aEE2D68fb9844B2CC70AD545B0e1150] = 1;
        mp[0xfC30085ad17D7340dd73bACeFb8D9f8C6b0F307F] = 1;
        mp[0x1821Ce945bbCD7253cA349c54EF0a302e88b2346] = 1;
        mp[0xC9a30725312B2d137CAFfdF2c707826cb641C206] = 1;
        mp[0x07211045B99A9f924c439988bbCbcDb3712f226D] = 1;
        mp[0x71cfe23928616DEd724ca9DC90a64409a071D29C] = 1;
        mp[0x74fac75DFd8f2B75AAebeD2614455E670be807af] = 1;
        mp[0x202c07Cbc8ae17Da8Fd9eE2563067250A0f546De] = 1;
        mp[0xF8D9624c05C668fee9FeB91505D273068901872d] = 1;
        mp[0x023B141c2cE8f79B19fcda0DaAEE4a4542f9a2B7] = 1;
        mp[0xD8bfDA9368e0DdA6d81ca79e78DDe703471dB283] = 1;
        mp[0x3141F76EF4c7709d978A27B38f2971751f88cF0F] = 1;
        mp[0x3Ee4c0ba4D05c3B1f7C3B3754E5ddf65e1CaC361] = 1;
        mp[0xAC7CF6bA79896d90f02FB61d76502918845c1947] = 1;
        mp[0x35066f85686C1f1aF829385c88CaD2DAb8a5A9b3] = 1;
        mp[0x48483532FdEaAE4c3EfD9fc0fe198FD9b205f83a] = 1;
        mp[0x4F3EdF987c6e434C9a57eCc2182f4e9B38B9D8dC] = 1;
        mp[0xeBdBFa365Efa6d1DA06d2b7CBf7E54D2B5Dd7185] = 2;
        mp[0x3D031Cd569400fD3b3f7FA9ADf6a3b131a43c197] = 1;
        mp[0x1f171834FeF16233ae93BB3acA99d83021EA00c4] = 1;
        mp[0x7d07B59090f481BA8FF7a67422C04595CB2C93B2] = 1;
        mp[0x1cd75A8387c0e36061b270af917AFb206634918c] = 1;
        mp[0x2C7F7Db1710B02F19cCB2Ab3f88Fc74A467fF5c9] = 1;
        mp[0xc2DfCFa2Bf1C871cB5af60b7eFBd95864984129D] = 1;
        mp[0xDe25b8bf8149913097AfA99EF52f9b6bF86De1eC] = 1;
        mp[0xCaC624276Df3bA84Bbb68270769a49a1e5c270d3] = 1;
        mp[0xc266672ab58f57C945fC5fe5cD89B2Ae591c6124] = 1;
        mp[0xf7C4e374e116b68c5324463949Ba3c5275B27236] = 1;
        mp[0x8b885f80feC49F397f0B53dB86aE8af4235C4763] = 1;
        mp[0x47923342988F3fD29EE6292Ad9A440728440ce4C] = 1;
        mp[0xd224c1061F9eD4bfbCddb1b45bB41eEa24b770e3] = 1;
        mp[0x205c726fE98b962530acd54C57EfD600f6AAfD50] = 1;
        mp[0xB45fCf6e1DAB1f15a21449d75F00Eef34fa7CB5e] = 1;
        mp[0xC43327b13ec860d8303e02CDC891b064BB5B7c4e] = 1;
        mp[0x45F8aef4DfaBfbF943416Db1e43f088e543bFDB6] = 1;
        mp[0x83D77D2199e8FB4aE195d464701de13D68C6671f] = 1;
        mp[0x18e4351436C02574b37c3526CF3D8C2057fa3Ca4] = 1;
        mp[0x57fbfe9726F7c0F8BD507d23113d892D6d541F45] = 1;
        mp[0x1183BDB0a24DC6ED62127F59eEe9De2fB410251A] = 1;
        mp[0xA32922d422F726AD0d10Dbf65d22B86e074aF68B] = 1;
        mp[0xd21f21Ed6B663028D6B9fC31f240e6D42A2E401b] = 1;
        mp[0x47B3A74eDa0042BbbD4C1a08c748171004233972] = 1;
        mp[0x4565F34C301f0b211854e025c67064A6a302837e] = 1;
        mp[0x5DCa0725DA4ABa4c253a17Dd3Bdae912CC9cCe97] = 1;
        mp[0x056161C77b4c4e51592bDff3dED1f4f14C600ECC] = 1;
        mp[0x64dc4cD18A82218BEaC92310Fbde8a46BD03a5fC] = 1;

        mintOwner();
        _pause();
    }

    function setBaseURI(string memory baseURIPrefix) external onlyOwner {
        _baseURIPrefix = baseURIPrefix;
    }

    function _baseURI() internal view override returns (string memory) {
        return _baseURIPrefix;
    }

    function tokenURI(uint256 tokenId) public view override(ERC721, ERC721URIStorage) returns (string memory) {
        return super.tokenURI(tokenId);
    }

    function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal whenNotPaused override(ERC721, ERC721Pausable) {
        super._beforeTokenTransfer(from, to, tokenId);
    }

    function _burn(uint256 tokenId) internal override(ERC721, ERC721URIStorage) {
        super._burn(tokenId);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    function beforeMint(uint256 numberOfMints) internal view {
        address sender = _msgSender();
        require(!sender.isContract() && tx.origin == sender, "Bots have no power here!");
        require(_tokenIds.current() + numberOfMints <= totalSupply, "Maximum amount of tokens already minted");
    }

    function mintPass_EWa9pesKnnMe(address wallet) whenNotPaused external returns (uint256) {
        uint256 numberOfMints = getMintPass(wallet).mul(2);

        uint mpFromSnap = IERC20(snapAddress).balanceOf(wallet).div(snapSupplyToMintPass);
        numberOfMints = numberOfMints.add(mpFromSnap.mul(2));

        if (numberOfMints > buyLimitMintPass) {
            numberOfMints = buyLimitMintPass;
        }

        require(numberOfMints > 0, "Cannot claim");

        beforeMint(numberOfMints);

        require(numberOfMints <= buyLimitMintPass, "You reached buy limit from single tx");
        require(!mintPassClaimed[wallet], "You reached wallet limit");

        mintPassClaimed[wallet] = true;
        doMint(wallet, numberOfMints);
        emit MintPassClaimed(wallet, numberOfMints);

        return _tokenIds.current();
    }

    function mintWhitelist_kJipc46qGX3K(address wallet, uint256 numberOfMints) whenNotPaused external payable returns (uint256) {
        beforeMint(numberOfMints);

        require(modeWhitelist, "Invoke same method but for public sale");
        require(numberOfMints <= buyLimitWhitelist, "You reached buy limit from single tx");
        require(mintedWhiteList[wallet].add(numberOfMints) <= buyLimitWhitelist, "You reached wallet limit");
        require(msg.value >= fee * numberOfMints, "Fee is not correct.");

        mintedWhiteList[wallet] = mintedWhiteList[wallet].add(numberOfMints);
        doMint(wallet, numberOfMints);

        return _tokenIds.current();
    }

    function mintPublic_NbrluxKI1WhB(address wallet, uint256 numberOfMints) whenNotPaused external payable returns (uint256) {
        beforeMint(numberOfMints);

        require(numberOfMints <= buyLimitPublicSale, "You reached buy limit from single tx");
        require(msg.value >= fee * numberOfMints, "Fee is not correct.");

        doMint(wallet, numberOfMints);

        return _tokenIds.current();
    }

    function doMint(address wallet, uint numberOfMints) private {
        for(uint i = 0; i < numberOfMints; i++) {
            _tokenIds.increment();
            uint256 tokenId = _tokenIds.current();
            _safeMint(wallet, tokenId);

            string memory tokenURISuffix = string(abi.encodePacked(toString(tokenId),  ".json"));
            _setTokenURI(tokenId, tokenURISuffix);
        }
    }

    function mintOwner() private onlyOwner returns (uint256) {
        require(_tokenIds.current() == 0);

        doMint(msg.sender, 200);

        return _tokenIds.current();
    }

    function mintSpecial(address wallet) external onlyOwner returns (uint256) {
        doMint(wallet, 1);
        totalSupply = totalSupply.add(1);
        return _tokenIds.current();
    }

    function setTotalSupply(uint256 _totalSupply) external onlyOwner {
        totalSupply = _totalSupply;
    }

    function setFee(uint256 _fee) external onlyOwner {
      fee = _fee;
    }

    function setBuyLimitMintPass(uint256 _buyLimitMintPass) external onlyOwner {
        buyLimitMintPass = _buyLimitMintPass;
    }

    function setBuyLimitWhitelist(uint256 _buyLimitWhitelist) external onlyOwner {
        buyLimitWhitelist = _buyLimitWhitelist;
    }

    function setBuyLimitPublicSale(uint256 _buyLimitPublicSale) external onlyOwner {
        buyLimitPublicSale = _buyLimitPublicSale;
    }

    function getFee() external view returns (uint) {
      return fee;
    }

    function cashOut() external {
        require(msg.sender == cashOutCallers[0] || msg.sender == cashOutCallers[1] || msg.sender == cashOutCallers[2] || msg.sender == cashOutCallers[3] || msg.sender == cashOutCallers[4] || msg.sender == cashOutCallers[5], "Should be called with whitelisted wallet");
        cashOutWallet.call{value: address(this).balance}("");
    }

    function currentTokenId() external view returns (uint256) {
        return _tokenIds.current();
    }

    function pause() external onlyOwner {
        _pause();
    }

    function unpause() external onlyOwner {
        _unpause();
    }

    function setModeWhitelist(bool _modeWhitelist) external onlyOwner {
        modeWhitelist = _modeWhitelist;
    }

    function setSnapAddress(address _snapAddress) external onlyOwner {
        snapAddress = _snapAddress;
    }

    function setSnapSupplyToMintPass(uint256 _snapSupplyToMintPass) external onlyOwner {
        snapSupplyToMintPass = _snapSupplyToMintPass;
    }

    function setMintPass(address a, uint256 tokens) external onlyOwner {
        if (tokens == 0) {
            delete mp[a];
        } else {
            mp[a] = tokens;
        }
    }

    function getMintPass(address _address) public view returns (uint256) {
        return mp[_address];
    }


}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// File: @openzeppelin/contracts/token/ERC721/ERC721.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
    using Address for address;
    using Strings for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to owner address
    mapping (uint256 => address) private _owners;

    // Mapping owner address to token count
    mapping (address => uint256) private _balances;

    // Mapping from token ID to approved address
    mapping (uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping (address => mapping (address => bool)) private _operatorApprovals;

    /**
     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
     */
    constructor (string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return interfaceId == type(IERC721).interfaceId
            || interfaceId == type(IERC721Metadata).interfaceId
            || super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        require(owner != address(0), "ERC721: balance query for the zero address");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _owners[tokenId];
        require(owner != address(0), "ERC721: owner query for nonexistent token");
        return owner;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");

        string memory baseURI = _baseURI();
        return bytes(baseURI).length > 0
            ? string(abi.encodePacked(baseURI, tokenId.toString()))
            : '';
    }

    /**
     * @dev Base URI for computing {tokenURI}. Empty by default, can be overriden
     * in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual override {
        address owner = ERC721.ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not owner nor approved for all"
        );

        _approve(to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        require(_exists(tokenId), "ERC721: approved query for nonexistent token");

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        require(operator != _msgSender(), "ERC721: approve to caller");

        _operatorApprovals[_msgSender()][operator] = approved;
        emit ApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(address from, address to, uint256 tokenId) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");

        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
        safeTransferFrom(from, to, tokenId, "");
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
        _safeTransfer(from, to, tokenId, _data);
    }

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * `_data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual {
        _transfer(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     * and stop existing when they are burned (`_burn`).
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return _owners[tokenId] != address(0);
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        require(_exists(tokenId), "ERC721: operator query for nonexistent token");
        address owner = ERC721.ownerOf(tokenId);
        return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
    }

    /**
     * @dev Safely mints `tokenId` and transfers it to `to`.
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(address to, uint256 tokenId) internal virtual {
        _safeMint(to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual {
        _mint(to, tokenId);
        require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 tokenId) internal virtual {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

        _beforeTokenTransfer(address(0), to, tokenId);

        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(address(0), to, tokenId);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId);

        // Clear approvals
        _approve(address(0), tokenId);

        _balances[owner] -= 1;
        delete _owners[tokenId];

        emit Transfer(owner, address(0), tokenId);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(address from, address to, uint256 tokenId) internal virtual {
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId);

        _balances[from] -= 1;
        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
        private returns (bool)
    {
        if (to.isContract()) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
                return retval == IERC721Receiver(to).onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    // solhint-disable-next-line no-inline-assembly
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, ``from``'s `tokenId` will be burned.
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { }
}

// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../ERC721.sol";

/**
 * @dev ERC721 token with storage based token URI management.
 */
abstract contract ERC721URIStorage is ERC721 {
    using Strings for uint256;

    // Optional mapping for token URIs
    mapping (uint256 => string) private _tokenURIs;

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), "ERC721URIStorage: URI query for nonexistent token");

        string memory _tokenURI = _tokenURIs[tokenId];
        string memory base = _baseURI();

        // If there is no base URI, return the token URI.
        if (bytes(base).length == 0) {
            return _tokenURI;
        }
        // If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
        if (bytes(_tokenURI).length > 0) {
            return string(abi.encodePacked(base, _tokenURI));
        }

        return super.tokenURI(tokenId);
    }

    /**
     * @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
        require(_exists(tokenId), "ERC721URIStorage: URI set of nonexistent token");
        _tokenURIs[tokenId] = _tokenURI;
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual override {
        super._burn(tokenId);

        if (bytes(_tokenURIs[tokenId]).length != 0) {
            delete _tokenURIs[tokenId];
        }
    }
}

// File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Pausable.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../ERC721.sol";
import "../../../security/Pausable.sol";

/**
 * @dev ERC721 token with pausable token transfers, minting and burning.
 *
 * Useful for scenarios such as preventing trades until the end of an evaluation
 * period, or having an emergency switch for freezing all token transfers in the
 * event of a large bug.
 */
abstract contract ERC721Pausable is ERC721, Pausable {
    /**
     * @dev See {ERC721-_beforeTokenTransfer}.
     *
     * Requirements:
     *
     * - the contract must not be paused.
     */
    function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual override {
        super._beforeTokenTransfer(from, to, tokenId);

        require(!paused(), "ERC721Pausable: token transfer while paused");
    }
}

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



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented or decremented by one. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }
}

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



// SPDX-License-Identifier: MIT

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;
        // solhint-disable-next-line no-inline-assembly
        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");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (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");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File: @openzeppelin/contracts/utils/math/SafeMath.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../utils/Context.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: @openzeppelin/contracts/token/ERC721/IERC721.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
      * @dev Safely transfers `tokenId` token from `from` to `to`.
      *
      * Requirements:
      *
      * - `from` cannot be the zero address.
      * - `to` cannot be the zero address.
      * - `tokenId` token must exist and be owned by `from`.
      * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
      * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
      *
      * Emits a {Transfer} event.
      */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}

// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}

// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {

    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

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



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

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



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant alphabet = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = alphabet[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

}

// File: @openzeppelin/contracts/utils/introspection/ERC165.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// File: @openzeppelin/contracts/utils/introspection/IERC165.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// File: @openzeppelin/contracts/security/Pausable.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor () {
        _paused = false;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        require(!paused(), "Pausable: paused");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        require(paused(), "Pausable: not paused");
        _;
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}