QuickNode Common Errors Skill

QuickNode Common Errors

Overview

Quick reference for the top blockchain RPC errors when using QuickNode endpoints with ethers.js or viem.

Prerequisites

QuickNode endpoint configured
ethers.js or viem installed

Instructions

Error 1: Nonce Too Low

Error: nonce has already been used (error={"code":-32000,"message":"nonce too low"})

Fix:

// Get the correct nonce before sending
const nonce = await provider.getTransactionCount(wallet.address, 'pending');
const tx = await wallet.sendTransaction({ ...txData, nonce });

Error 2: Insufficient Funds

Error: insufficient funds for intrinsic transaction cost

Fix:

const balance = await provider.getBalance(wallet.address);
const gasEstimate = await provider.estimateGas(txData);
const feeData = await provider.getFeeData();
const totalCost = gasEstimate * feeData.gasPrice! + txData.value;
if (balance < totalCost) {
  console.error(`Need ${ethers.formatEther(totalCost)} ETH, have ${ethers.formatEther(balance)}`);
}

Error 3: Gas Estimation Failed (Call Revert)

Error: execution reverted (reason="ERC20: transfer amount exceeds balance")

Fix: The contract function would revert. Check contract requirements:

try {
  const gas = await contract.transfer.estimateGas(to, amount);
} catch (err) {
  console.error('Revert reason:', err.reason);
  // Check: sufficient token balance, approvals, contract state
}

Error 4: Rate Limited (429)

Error: 429 Too Many Requests

Fix: Implement exponential backoff or upgrade plan:

async function retryRpc<T>(fn: () => Promise<T>, retries = 3): Promise<T> {
  for (let i = 0; i < retries; i++) {
    try { return await fn(); }
    catch (err: any) {
      if (err.code === 'SERVER_ERROR' && i < retries - 1) {
        await new Promise(r => setTimeout(r, 1000 * Math.pow(2, i)));
        continue;
      }
      throw err;
    }
  }
  throw new Error('Max retries');
}

Error 5: Method Not Found

Error: Method not found — qn_getTokenMetadataByContractAddress

Fix: This method requires an add-on. Enable it in QuickNode Dashboard > Endpoints > Add-ons.

Error 6: WebSocket Connection Dropped

Error: WebSocket connection closed unexpectedly

Fix:

const wsProvider = new ethers.WebSocketProvider(process.env.QUICKNODE_WSS);
wsProvider.websocket.on('close', () => {
  console.log('WebSocket closed, reconnecting...');
  // Reconnect logic
});

Output

Error identified from RPC response
Targeted fix applied
Transaction successfully sent or contract call succeeded

Error Handling

| RPC Code | Meaning | Retryable | |----------|---------|-----------| | -32000 | Nonce/gas issue | Fix and retry | | -32602 | Invalid params | No — fix request | | -32603 | Internal error | Yes — retry | | 429 | Rate limited | Yes — backoff |

Resources

Next Steps

For debugging, see quicknode-debug-bundle.

Agent Skills: QuickNode Common Errors

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