// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
// Chainlink Imports
import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
// This import includes functions from both ./KeeperBase.sol and
// ./interfaces/KeeperCompatibleInterface.sol
import "@chainlink/contracts/src/v0.8/KeeperCompatible.sol";
import "@chainlink/contracts/src/v0.8/interfaces/VRFCoordinatorV2Interface.sol";
import "@chainlink/contracts/src/v0.8/VRFConsumerBaseV2.sol";
// Dev imports. This only works on a local dev network
// and will not work on any test or main livenets.
import "hardhat/console.sol";
contract BullBear is ERC721, ERC721Enumerable, ERC721URIStorage, Ownable, VRFConsumerBaseV2, KeeperCompatibleInterface {
using Counters for Counters.Counter;
Counters.Counter private _tokenIdCounter;
uint public interval;
uint public lastTimeStamp;
AggregatorV3Interface public priceFeed;
int256 public currentPrice;
// IPFS URIs for the dynamic nft graphics/metadata.
// NOTE: These connect to my IPFS Companion node.
// You should upload the contents of the /ipfs folder to your own node for development.
string[] bullUrisIpfs = [
"https://ipfs.io/ipfs/QmRXyfi3oNZCubDxiVFre3kLZ8XeGt6pQsnAQRZ7akhSNs?filename=gamer_bull.json",
"https://ipfs.io/ipfs/QmRJVFeMrtYS2CUVUM2cHJpBV5aX2xurpnsfZxLTTQbiD3?filename=party_bull.json",
"https://ipfs.io/ipfs/QmdcURmN1kEEtKgnbkVJJ8hrmsSWHpZvLkRgsKKoiWvW9g?filename=simple_bull.json"
];
string[] bearUrisIpfs = [
"https://ipfs.io/ipfs/Qmdx9Hx7FCDZGExyjLR6vYcnutUR8KhBZBnZfAPHiUommN?filename=beanie_bear.json",
"https://ipfs.io/ipfs/QmTVLyTSuiKGUEmb88BgXG3qNC8YgpHZiFbjHrXKH3QHEu?filename=coolio_bear.json",
"https://ipfs.io/ipfs/QmbKhBXVWmwrYsTPFYfroR2N7NAekAMxHUVg2CWks7i9qj?filename=simple_bear.json"
];
// random
VRFCoordinatorV2Interface COORDINATOR;
// Your subscription ID.
uint64 s_subscriptionId;
// Goerli coordinator. For other networks,
// see https://docs.chain.link/docs/vrf-contracts/#configurations
address vrfCoordinator = 0x6168499c0cFfCaCD319c818142124B7A15E857ab;
// The gas lane to use, which specifies the maximum gas price to bump to.
// For a list of available gas lanes on each network,
// see https://docs.chain.link/docs/vrf-contracts/#configurations
bytes32 keyHash = 0xd89b2bf150e3b9e13446986e571fb9cab24b13cea0a43ea20a6049a85cc807cc;
// Depends on the number of requested values that you want sent to the
// fulfillRandomWords() function. Storing each word costs about 20,000 gas,
// so 100,000 is a safe default for this example contract. Test and adjust
// this limit based on the network that you select, the size of the request,
// and the processing of the callback request in the fulfillRandomWords()
// function.
uint32 callbackGasLimit = 100000;
// The default is 3, but you can set this higher.
uint16 requestConfirmations = 3;
// For this example, retrieve 2 random values in one request.
// Cannot exceed VRFCoordinatorV2.MAX_NUM_WORDS.
uint32 numWords = 2;
uint256[] public s_randomWords;
uint256 public s_requestId;
event TokensUpdated(string marketTrend);
constructor(uint updateInterval, address _priceFeed, uint64 subscriptionId) ERC721("Bull&Bear", "BBTK") VRFConsumerBaseV2(vrfCoordinator) {
interval = updateInterval;
lastTimeStamp = block.timestamp;
// https://rinkeby.etherscan.io/address/0xECe365B379E1dD183B20fc5f022230C044d51404
priceFeed = AggregatorV3Interface(_priceFeed);
currentPrice = getLatestPrice();
COORDINATOR = VRFCoordinatorV2Interface(vrfCoordinator);
s_subscriptionId = subscriptionId;
}
function safeMint(address to) public {
// Current counter value will be the minted token's token ID.
uint256 tokenId = _tokenIdCounter.current();
// Increment it so next time it's correct when we call .current()
_tokenIdCounter.increment();
// Mint the token
_safeMint(to, tokenId);
// Default to a bull NFT
string memory defaultUri = bullUrisIpfs[s_randomWords[0]%3];
_setTokenURI(tokenId, defaultUri);
console.log(
"DONE!!! minted token ",
tokenId,
" and assigned token url: ",
defaultUri
);
}
function checkUpkeep(bytes calldata) external view override returns (bool upkeepNeeded, bytes memory /*performData*/){
upkeepNeeded = (block.timestamp - lastTimeStamp) > interval;
}
function performUpkeep(bytes calldata) external override{
if((block.timestamp - lastTimeStamp) > interval){
lastTimeStamp = block.timestamp;
int latestPrice = getLatestPrice();
if(latestPrice == currentPrice){
return;
}else if(latestPrice < currentPrice){
updateAllTokenUris("bears");
}else{
updateAllTokenUris("bull");
}
currentPrice = latestPrice;
}
}
function getLatestPrice() public view returns(int256){
(,
int price,
,
,) = priceFeed.latestRoundData();
return price;
}
function updateAllTokenUris(string memory trend) internal{
if(compareStrings("bears", trend)){
for(uint i=0; i< _tokenIdCounter.current(); i++){
_setTokenURI(i,bearUrisIpfs[s_randomWords[0]%3]);
}
}else {
for(uint i=0; i< _tokenIdCounter.current(); i++){
_setTokenURI(i,bullUrisIpfs[s_randomWords[0]%3]);
}
}
emit TokensUpdated(trend);
}
function setInterval(uint256 newInterval) public onlyOwner{
interval = newInterval;
}
function setPriceFeed(address newFeed) public onlyOwner{
priceFeed = AggregatorV3Interface(newFeed);
}
function compareStrings(string memory a, string memory b) internal pure returns (bool){
return keccak256(abi.encodePacked(a)) == keccak256(abi.encodePacked(b));
}
// The following functions are overrides required by Solidity.
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal override(ERC721, ERC721Enumerable) {
super._beforeTokenTransfer(from, to, tokenId);
}
function _burn(uint256 tokenId)
internal
override(ERC721, ERC721URIStorage)
{
super._burn(tokenId);
}
function tokenURI(uint256 tokenId)
public
view
override(ERC721, ERC721URIStorage)
returns (string memory)
{
return super.tokenURI(tokenId);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
// Assumes the subscription is funded sufficiently.
function requestRandomWords() external onlyOwner {
// Will revert if subscription is not set and funded.
s_requestId = COORDINATOR.requestRandomWords(
keyHash,
s_subscriptionId,
requestConfirmations,
callbackGasLimit,
numWords
);
}
function fulfillRandomWords(
uint256, /* requestId */
uint256[] memory randomWords
) internal override {
s_randomWords = randomWords;
}
}
