AA23: ValidateUserOp Function Failure

Troubleshooting validateUserOp execution issues

Note: OOG = “Out Of Gas”

The smart account’s validateUserOp 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 validateUserOp costs, if it is less.

2. Logic Verification:

   • Review validateUserOp implementation
   • Confirm the user operation’s validity

3. For Non-Paymaster Scenarios:

   • Verify sufficient native tokens in the sender address:
   const neededFunds = calculateRequiredPrefund({ userOperation });
   const accountBalance = await client.getBalance({
     address: userOperation.sender,
   });
   if (accountBalance < neededFunds) {
     throw new Error("Insufficient funds in sender account");
   }
   

4. For Paymaster Usage: - Ensure paymasterAndData is properly set:

   const opHash = await bundler.sendUserOp({
       paymasterAndData: "0x3b912be0270b59143985cc5c6aab452d99e2b4bb0000000000000000000000000000000000000000000000000000000064c0957400000000000000000000000000000000000000000000000000000000000000007d99385d8ef0af67affbf9944df8c121e9d1f6aef8dd82a4aeb5db310c42d3dc5b51c9e0835d94c3b22564d3d94f0e1d14e37571e46651da8de567d128a361a01b",
       // Additional operation details...
   })
   

5. Signature Verification:

   • Ensure your implementation doesn’t revert for invalid signatures
   • For non-time-sensitive operations, return uint(1) for invalid signatures

6. Advanced Debugging:

   • Utilize tools like Tenderly for in-depth analysis