MusicCoin.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

contract MusicCoinContract is ERC721, ERC721URIStorage {
    using Counters for Counters.Counter;

    Counters.Counter private _tokenIdCounter;

    string public baseURI;

    constructor() ERC721("MusicCoin", "MC") {
        baseURI = "ipfs://";
    }

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

    function mintMusic(string memory _tokenURI) public {
        uint256 tokenId = _tokenIdCounter.current();
        _tokenIdCounter.increment();
        _safeMint(msg.sender, tokenId);
        _setTokenURI(tokenId, _tokenURI);
    }

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

    function tokenURI(
        uint256 tokenId
    ) public view override(ERC721, ERC721URIStorage) returns (string memory) {
        require(_exists(tokenId), "Token doesn't exist");
        return super.tokenURI(tokenId);
    }
}