MorarableToken.sol

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

contract DropToken is ERC721 {
    using Counters for Counters.Counter;
    Counters.Counter private _tokenIds;

    constructor() ERC721("DropTicket", "DRT") {}

    struct Item {
        uint256 id;
        address creator;
        string uri;
    }

    uint256 newItemId;

    mapping(uint256 => Item) public Items;

    function createItem(string memory uri) public returns (uint256) {
        _tokenIds.increment();
        newItemId = _tokenIds.current();
        _safeMint(msg.sender, newItemId);

        Items[newItemId] = Item(newItemId, msg.sender, uri);

        return newItemId;
    }

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

        return Items[newItemId].uri;
    }
}