Is your feature request related to a problem? Please describe.

When payment is provided, the x402ServerExecutor is:

1. Verifying: self.verify_payment(...)
2. Setting task metadata
3. Executing: await self._delegate.execute(context, event_queue)
4. Settling: await self.settle_payment(...)

I'd argue that's too much. In particular, users might want to settle before executing.

Describe the solution you'd like

I suggest the x402ServerExecutor delegates some of these tasks. In particular I think x402ExtensionConfig should be expanded to accommodate before_execute and after_execute hooks that would take in a PaymentPayload and a PaymentRequirements and do the required verification and settling as the user sees fit. before_execute could also use it's return value to set task metadata.

If required this library could provide additional defaults to keep the current behavior as a convenience.

Code of Conduct

• I agree to follow this project's Code of Conduct