advancedcollectible.sol

pragma solidity 0.6.6;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@chainlink/contracts/src/v0.6/VRFConsumerBase.sol";contract 
AdvancedCollectible is ERC721, VRFConsumerBase {
  uint256 public tokenCounter;
  enum Breed{PUG, SHIBA_INU, BRENARD}
  // add other things
  mapping(bytes32 => address) public requestIdToSender;
  mapping(bytes32 => string) public requestIdToTokenURI;
  mapping(uint256 => Breed) public tokenIdToBreed;
  mapping(bytes32 => uint256) public requestIdToTokenId;
  event requestedCollectible(bytes32 indexed requestId);
  bytes32 internal keyHash;
  uint256 internal fee;
  uint256 public randomResult;
  constructor(address _VRFCoordinator, address _LinkToken, bytes32 _keyhash)
  public
  VRFConsumerBase(_VRFCoordinator, _LinkToken)
  ERC721("Dogie", "DOG")
  {
    tokenCounter = 0;
    keyHash = _keyhash;
    fee = 0.1 * 10 ** 18;
  }
  function createCollectible(string memory tokenURI, uint256 userProvidedSeed)
public returns (bytes32){
    bytes32 requestId = requestRandomness(keyHash, fee, userProvidedSeed);
    requestIdToSender[requestId] = msg.sender;
    requestIdToTokenURI[requestId] = tokenURI;
    emit requestedCollectible(requestId);
  }
  function fulfillRandomness(bytes32 requestId, uint256 randomNumber) internal override {
    address dogOwner = requestIdToSender[requestId];
    string memory tokenURI = requestIdToTokenURI[requestId];
    uint256 newItemId = tokenCounter;
    _safeMint(dogOwner, newItemId);
    _setTokenURI(newItemId, tokenURI);
    Breed breed = Breed(randomNumber % 3);
    tokenIdToBreed[newItemId] = breed;
    requestIdToTokenId[requestId] = newItemId;
  }
}