AA33: Paymaster Validation Function Failure

Troubleshooting validatePaymasterUserOp execution issues

Note: OOG = “Out Of Gas”

The paymaster’s validatePaymasterUserOp function encountered an issue:

• It may have reverted unexpectedly
• It may have exhausted its gas allocation

Troubleshooting Steps

1. Gas Limit Check:

   • Increase the verificationGasLimit to cover validatePaymasterUserOp costs

2. For Custom Paymaster Contracts:

   • Review validatePaymasterUserOp implementation
   • Ensure proper signature verification logic (avoid reverting for invalid signatures)
   • For non-time-based signatures, return uint(1) for invalid signatures

3. For Third-Party Paymaster Services:

   • If using JiffyLabs and encountering issues, contact their support

4. When Not Using a Paymaster:

   • Ensure the paymasterAndData field is not set:

   const opHash = await bundler.sendUserOp({
     paymasterAndData: "0x",
     // Additional operation details...
   })
   

5. Advanced Debugging:

   • Utilize tools like Tenderly for in-depth analysis