Ronin - Gaming-Focused Blockchain Documentation

// Check NFT ownership
async function checkNFTOwnership(contractAddress, tokenId, userAddress) {
  const contract = new ethers.Contract(contractAddress, erc721Abi, provider);
  const owner = await contract.ownerOf(tokenId);
  return owner.toLowerCase() === userAddress.toLowerCase();
}

// Batch token balance queries
async function getUserTokens(userAddress, tokenAddresses) {
  const calls = tokenAddresses.map(address => ({
    method: 'eth_call',
    params: [{
      to: address,
      data: '0x70a08231' + userAddress.slice(2).padStart(64, '0') // balanceOf(address)
    }, 'latest']
  }));

  return await provider.send(calls);
}

// Fast transaction confirmation
async function waitForGameAction(txHash) {
  const receipt = await provider.waitForTransaction(txHash, 1);

  // Ronin's fast finality means 1 confirmation is usually enough
  console.log('Game action confirmed in block:', receipt.blockNumber);

  return receipt;
}

// Gas estimation for game transactions
async function estimateGameTxCost(gameAction) {
  const gasEstimate = await provider.estimateGas(gameAction);
  const gasPrice = await provider.getGasPrice();

  // Calculate cost in RON
  const cost = gasEstimate * gasPrice;
  return ethers.formatEther(cost);
}

// Monitor game events with optimized batching
async function trackGameEvents(contract, eventName, fromBlock = 0) {
  const filter = contract.filters[eventName]();
  const events = [];
  const batchSize = 5000; // Ronin handles larger batches well

  const currentBlock = await provider.getBlockNumber();

  for (let i = fromBlock; i <= currentBlock; i += batchSize) {
    const batch = await contract.queryFilter(
      filter,
      i,
      Math.min(i + batchSize - 1, currentBlock)
    );
    events.push(...batch);
  }

  return events;
}

const gamingBatch = [
  { method: 'eth_blockNumber', params: [] },
  { method: 'eth_gasPrice', params: [] },
  { method: 'eth_getBalance', params: [playerAddress, 'latest'] },
  { method: 'eth_call', params: [{ to: gameContract, data: gameStateCall }, 'latest'] }
];

const results = await provider.send(gamingBatch);

// Gaming-optimized provider singleton
class RoninGameProvider {
  static instance = null;

  static getInstance() {
    if (!this.instance) {
      this.instance = new JsonRpcProvider(
        'https://api-ronin-mainnet.n.dwellir.com/YOUR_API_KEY',
        {
          staticNetwork: ethers.Network.from({
            name: 'ronin',
            chainId: 2020
          })
        }
      );
    }
    return this.instance;
  }
}

const gameStateCache = new Map();

async function getCachedGameState(gameId) {
  const key = `game_${gameId}`;

  if (!gameStateCache.has(key)) {
    const state = await contract.getGameState(gameId);
    gameStateCache.set(key, state);

    // Clear cache after 30 seconds (game state can change)
    setTimeout(() => gameStateCache.delete(key), 30000);
  }

  return gameStateCache.get(key);
}

// Check RON balance before transactions
const balance = await provider.getBalance(address);
const gasEstimate = await provider.estimateGas(tx);
const gasPrice = await provider.getGasPrice();
const totalRequired = gasEstimate * gasPrice + (tx.value || 0n);

if (balance < totalRequired) {
  throw new Error(`Need ${ethers.formatEther(totalRequired - balance)} more RON`);
}

// Get current network fee data
const feeData = await provider.getFeeData();

const tx = {
  to: recipient,
  value: amount,
  gasPrice: feeData.gasPrice, // Ronin uses legacy gas pricing
  gasLimit: 21000n
};

async function gameActionWithRetry(fn, maxRetries = 5) {
  for (let i = 0; i < maxRetries; i++) {
    try {
      return await fn();
    } catch (error) {
      if (error.code === 429 && i < maxRetries - 1) {
        // Shorter backoff for gaming scenarios
        await new Promise(r => setTimeout(r, 500 * (2 ** i)));
      } else {
        throw error;
      }
    }
  }
}

// Before (Ethereum)
const provider = new JsonRpcProvider('https://eth-rpc.example.com');

// After (Ronin)
const provider = new JsonRpcProvider(
  'https://api-ronin-mainnet.n.dwellir.com/YOUR_API_KEY'
);

// Same smart contract interface
// Same Web3 libraries work
// Note: Different chain ID (2020)
// Note: RON instead of ETH for gas
// Note: Different block explorer

// Test 1: Network connection
const chainId = await provider.send('eth_chainId', []);
console.log('Connected to Ronin:', parseInt(chainId) === 2020);

// Test 2: Recent block data
const latestBlock = await provider.send('eth_getBlockByNumber', ['latest', false]);
console.log('Latest block:', parseInt(latestBlock.number));

// Test 3: Token balance check (USDC on Ronin)
const usdcBalance = await provider.send('eth_call', [{
  to: '0x0b7007c13325c48911f73a2dad5fa5dcbf808adc',
  data: '0x70a08231000000000000000000000000' + 'YOUR_ADDRESS'.slice(2)
}, 'latest']);
console.log('USDC balance check successful');