ERC-4337 Debugging

Guide to debugging account abstraction issues.

Common Error Codes

Code	Meaning	Solution
AA10	Sender not deployed	Deploy account first
AA21	Insufficient prefund	Add gas funds or use paymaster
AA24	Signature validation failed	Check signer/wallet connection
AA25	Invalid nonce	Refresh nonce or wait for pending tx
AA31	Paymaster deposit too low	Paymaster needs funding
AA34	Signature validation failed	Check signature format

const address = await wallet.getAddress();
console.log("Connected:", address);

const nonce = await entryPoint.getNonce(account, 0);
console.log("Current nonce:", nonce);

const paymasterData = await paymaster.getPaymasterData(userOp);
console.log("Paymaster response:", paymasterData);

try {
  await entryPoint.simulateValidation(userOp);
} catch (e) {
  console.log("Simulation error:", e.errorName);
}