AA25: Nonce Mismatch

Addressing invalid nonce issues in user operations

The nonce provided in your user operation is invalid.

Resolution Strategies

1. Nonce Verification:

   • Ensure you’re using the correct current nonce for the smart account and selected key
   • Consider using getAccountNonce

2. Common Pitfalls:

   • Avoid reusing previously used nonces
   • Don’t use nonces too far in the future (no more than 10 ahead of current nonce)

3. Formatting Check:

   • Verify correct nonce format

4. Parallel Transaction Handling:

   • For concurrent operations, utilize custom nonce key
   • Refer to Parallel Transaction Guide

Nonce Structure: The EntryPoint uses a 256-bit nonce, split into:

• 192-bit key
• 64-bit sequence Each key has its own sequential sequence, allowing new key introduction with arbitrary values.