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World Chain – The Human-First Ethereum Layer 2

World Chain RPC
With Dwellir, you get access to our global World Chain network which always routes your API requests to the nearest available location, ensuring low latency and the fastest speeds.

Get your API key →

Why Build on World Chain?#

World Chain is an Ethereum L2 built on the OP Stack that prioritizes verified humans over bots. Through World ID integration, verified users receive free gas allowances and priority blockspace:

Human-First Design#

  • Priority mempool - Verified World ID holders get preferential block inclusion
  • Free gas allowances - Recurring gas grants for verified humans
  • Sybil resistance - Built-in protection against bot spam and attacks

Optimism Superchain#

  • OP Stack powered - Built on battle-tested Optimism technology
  • Ethereum security - Settles to mainnet for maximum security
  • EVM compatible - Deploy existing Solidity contracts without changes

World Ecosystem#

  • World App integration - Seamless access via the World super-app
  • World ID verification - Privacy-preserving identity proof
  • Growing ecosystem - Part of the broader World Network

Quick Start with World Chain#

Connect to World Chain in seconds with Dwellir's optimized endpoints:

🔗 RPC Endpoints

MainnetChain ID: 1
Mainnet
HTTPS
https://api-worldchain-mainnet.n.dwellir.com/<API_Keys_Are_Not_Made_for_Bots>
✓ Archive Node✓ Trace API✓ Debug API✓ WebSocket

Quick Connect:

curl -X POST https://api-worldchain-mainnet.n.dwellir.com/<API_Keys_Are_Not_Made_for_Bots> \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

Installation & Setup#

import { JsonRpcProvider } from 'ethers';

// Connect to World Chain mainnet
const provider = new JsonRpcProvider(
  'https://api-worldchain-mainnet.n.dwellir.com/YOUR_API_KEY'
);

// Get the latest block
const block = await provider.getBlock('latest');
console.log('Latest block:', block.number);

// Query account balance
const balance = await provider.getBalance('0x...');
console.log('Balance:', balance.toString());

Network Information#

Chain ID

480

Mainnet

Block Time

2 seconds

Average

Gas Token

ETH

Native token

RPC Standard

Ethereum

JSON-RPC 2.0

JSON-RPC API Reference#

World Chain supports the full Ethereum JSON-RPC API specification as an OP Stack L2.

Available JSON-RPC Methods

Reading Blockchain Data

Query blocks, transactions, and account states

+

Sending Transactions

Submit and manage transactions

+

Smart Contract Interaction

Call and interact with smart contracts

+

Node & Network Info

Query node status and network information

+

Ready to integrate Base into your dApp?

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Common Integration Patterns#

Transaction Monitoring#

Monitor pending and confirmed transactions efficiently:

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

  // Check transaction status
  if (receipt.status === 1) {
    console.log('Transaction successful');
  } else {
    console.log('Transaction failed');
  }

  return receipt;
}

Gas Optimization#

Optimize gas costs on World Chain:

// Get current fee data (EIP-1559)
const feeData = await provider.getFeeData();

// Estimate gas for transaction
const gasEstimate = await provider.estimateGas(tx);

// Calculate total cost
const totalCost = gasEstimate * feeData.gasPrice;
console.log('Estimated cost:', totalCost);

Event Filtering#

Efficiently query contract events with proper pagination:

// Query events with automatic retry and pagination
async function getEvents(contract, eventName, fromBlock = 0) {
  const filter = contract.filters[eventName]();
  const events = [];
  const batchSize = 2000; // Recommended batch size
  const latestBlock = await provider.getBlockNumber();

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

  return events;
}

Performance Best Practices#

1. Batch Requests#

Combine multiple RPC calls for optimal performance:

const batch = [
  { method: 'eth_blockNumber', params: [] },
  { method: 'eth_gasPrice', params: [] },
  { method: 'eth_getBalance', params: [address, 'latest'] }
];

const results = await provider.send(batch);

2. Connection Pooling#

Reuse provider instances to minimize connection overhead:

// Singleton pattern for provider
class WorldChainProvider {
  static instance = null;

  static getInstance() {
    if (!this.instance) {
      this.instance = new JsonRpcProvider(
        'https://api-worldchain-mainnet.n.dwellir.com/YOUR_API_KEY'
      );
    }
    return this.instance;
  }
}

3. Smart Caching#

Cache immutable data to reduce API calls:

const cache = new Map();

async function getCachedBlockData(blockNumber) {
  const key = `block_${blockNumber}`;

  if (!cache.has(key)) {
    const block = await provider.getBlock(blockNumber);
    cache.set(key, block);
  }

  return cache.get(key);
}

Troubleshooting Common Issues#

Error: "Insufficient funds for gas"#

World Chain transactions require ETH for gas fees:

// Always account for gas in balance checks
const balance = await provider.getBalance(address);
const gasPrice = await provider.getGasPrice();
const gasLimit = await provider.estimateGas(tx);
const gasCost = gasPrice * gasLimit;

if (balance < (tx.value + gasCost)) {
  throw new Error(`Need ${(tx.value + gasCost) - balance} more wei`);
}

Error: "Transaction underpriced"#

Use current market gas prices:

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

const tx = {
  to: recipient,
  value: amount,
  maxFeePerGas: feeData.maxFeePerGas,
  maxPriorityFeePerGas: feeData.maxPriorityFeePerGas,
  gasLimit: 21000n
};

Error: "Rate limit exceeded"#

Implement exponential backoff for resilient applications:

async function callWithRetry(fn, maxRetries = 3) {
  for (let i = 0; i < maxRetries; i++) {
    try {
      return await fn();
    } catch (error) {
      if (error.code === 429 && i < maxRetries - 1) {
        await new Promise(r => setTimeout(r, 2 ** i * 1000));
      } else {
        throw error;
      }
    }
  }
}

Smoke Tests#

Test Connection with cURL#

# Test World Chain mainnet
curl -X POST https://api-worldchain-mainnet.n.dwellir.com/YOUR_API_KEY \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'

Test with Ethers.js#

// Test mainnet connection
const mainnetProvider = new JsonRpcProvider(
  'https://api-worldchain-mainnet.n.dwellir.com/YOUR_API_KEY'
);

const blockNumber = await mainnetProvider.getBlockNumber();
const network = await mainnetProvider.getNetwork();

console.log('Block number:', blockNumber);
console.log('Chain ID:', network.chainId); // Should be 480n

Test with Web3.py#

from web3 import Web3

# Test connection
web3 = Web3(Web3.HTTPProvider(
  'https://api-worldchain-mainnet.n.dwellir.com/YOUR_API_KEY'
))

print('Connected:', web3.is_connected())
print('Chain ID:', web3.eth.chain_id)  # Should be 480
print('Block number:', web3.eth.block_number)

Migration Guide#

Migrating to Dwellir#

Replace your existing RPC endpoint with Dwellir:

// Before
const provider = new JsonRpcProvider('https://other-provider.com');

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

// ✅ All existing code works identically
// ✅ Same JSON-RPC methods supported
// ✅ Same response formats
// ⚠️ Update your API endpoint URL
// ⚠️ Add your Dwellir API key

Resources & Tools#

Official Resources#

Developer Tools#

Need Help?#

Start building on World Chain with Dwellir's enterprise-grade RPC infrastructure. Get your API key →