MusicNFT.sol

MusicNFT.sol

pragma solidity ^0.6.12;

import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v3.1.0/contracts/token/ERC20/ERC20.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v3.1.0/contracts/token/ERC721/ERC721.sol";


contract InheritedToken is ERC20("Mocked DAI Token", "DAI-T") {
    
}

contract InheritedNFT is ERC721("KORRIO Collectiable", "KNFT") {
    
    Music[] public musics;
    address[] public tokenOwner;
    
    constructor() public {
        
    }
    
    struct Music {
        uint256 tokenId;
        string title;
        string album;
        string artist;
        string genre;
        string artwork; // ipfs hash
        string mp3; // ipfs hash
    }
    
    function mint(
        string memory _title, 
        string memory _album, 
        string memory _artist, 
        string memory _genre, 
        string memory _artwork, 
        string memory _mp3) public payable {
        uint256 _tokenId = totalSupply();
        tokenOwner[_tokenId] = msg.sender;
        
        // 1. memory-based
        Music memory music = Music(_tokenId,_title,_album,_artist,_genre,_artwork,_mp3);
        musics.push(music);
        
        // 2. on-the-fly 
        // musics.push(Music({
        //     tokenId: _tokenId, 
        //     title: _title, 
        //     album: _album, 
        //     artist: _artist, 
        //     genre:_genre,
        //     artwork:_artwork,
        //     mp3:_mp3
        // }));
        
        super._mint(msg.sender, _tokenId);
    }
}