contract AbandonedKidKongz is ERC721Enumerable, Ownable {
  using Strings for uint256;

  string public baseURI;
  string public baseExtension = ".json";
  uint256 public maxSupply = 4000;
  uint256 public maxMintAmount = 1;
  uint256 public maxHoldings = 200;
  bool public paused = false;
  mapping(address => bool) public whitelisted;
  address public multisig = 0xF179dB6d69e2845da1a1f5fBD91a19e0c2399A8E;
  address public kk = 0xfa347ed0F9B0c3607b6531F0559BF28bFC4E3d28;

  constructor(
    string memory _name,
    string memory _symbol,
    string memory _initBaseURI
  ) ERC721(_name, _symbol) {
     
    setBaseURI(_initBaseURI);
    
  }

  // internal
  function _baseURI() internal view virtual override returns (string memory) {
    return baseURI;
  }

  function mint(address _to, uint256 _tokenId) public {
    uint256 mintAmount = 1;
    uint256 supply = totalSupply();
    uint256 userBalance = balanceOf(msg.sender);
    require(!paused);
    require(mintAmount > 0);
    require(mintAmount <= maxMintAmount);
    require(supply + mintAmount <= maxSupply);
    require(userBalance + mintAmount <= maxHoldings);
    IERC721(kk).transferFrom(msg.sender, multisig, _tokenId);
    _safeMint(_to, _tokenId);
  }

  function walletOfOwner(address _owner)
    public
    view
    returns (uint256[] memory)
  {
    uint256 ownerTokenCount = balanceOf(_owner);
    uint256[] memory tokenIds = new uint256[](ownerTokenCount);
    for (uint256 i; i < ownerTokenCount; i++) {
      tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
    }
    return tokenIds;
  }

  function tokenURI(uint256 tokenId)
    public
    view
    virtual
    override
    returns (string memory)
  {
    require(
      _exists(tokenId),
      "ERC721Metadata: URI query for nonexistent token"
    );

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

  //only owner

  function setMaxHoldings(uint256 _setMaxHoldings) public onlyOwner() {
    maxHoldings = _setMaxHoldings;
  }

  function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner() {
    maxMintAmount = _newmaxMintAmount;
  }

  function setBaseURI(string memory _newBaseURI) public onlyOwner {
    baseURI = _newBaseURI;
  }

  function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
    baseExtension = _newBaseExtension;
  }

  function pause(bool _state) public onlyOwner {
    paused = _state;
  }
}
///////////////////////////// CARBONPAWS.IO ///////////////////////////////
function setMaxHoldings(uint256 _setMaxHoldings) public onlyOwner() {
  maxHoldings = _setMaxHoldings;
}

//only owner