AA50: Paymaster PostOp Reversion

Addressing issues with paymaster’s postOp function

The postOp function is called by the EntryPoint on the paymaster contract after user operation execution, often used for additional accounting logic.

The paymaster contract’s postOp function has reverted unexpectedly.

Resolution Strategies

1. For Custom Paymaster Contracts:

   • Review and correct the postOp function implementation
   • If not using postOp, ensure the context parameter is not set in validatePaymasterUserOp

2. For Third-Party Paymaster Services:

   • If using a service like JiffyLabs and encountering this error, contact their support

3. Advanced Troubleshooting:

   • Investigate postOp reversion causes using tools like Tenderly