🎨 ERC-721: Crea tu Propio NFT

Colección CryptoArt ” 0 NFTs

tokenURI Metadata (EIP-721)

Solidity ” Contrato ERC-721

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Base64.sol";

contract CryptoArt is ERC721, Ownable {
  uint256 private _tokenId;

  struct NFTData {
    string rarity;
    string palette;
    uint256 power;
  }
  mapping(uint256 => NFTData) public nftData;

  constructor() ERC721("CryptoArt", "CART") Ownable(msg.sender) {}

  function safeMint(address to) external onlyOwner {
    uint256 id = ++_tokenId;
    nftData[id] = NFTData("Rare", "Neon", 85);
    _safeMint(to, id);
  }

  function tokenURI(uint256 id) public view override
    returns (string memory) {
    return string.concat("data:application/json;base64,",
      Base64.encode(abi.encodePacked(
        '{"name":"CryptoArt #', Strings.toString(id),
        '","attributes":[{"trait_type":"Rarity","value":"',
        nftData[id].rarity, '"}]}'
      ))
    );
  }
}