[marcyb5st]

I think that while the approach is good, there was a better option (IMHO). Specifically, I would:

1. Create protobuffers (or similar) messages that wrap the requests and responses. E.g. CheckSubscriptionPaidRequest and CheckSubscriptionPaidResponse.

2. Refactor your code so that the fields in the messages defined in #1 are your only mean to pass/retrieve information.

3. If need be, expose the service through GRPC or similar.

4. Repeat for each service/endpoint.

This way, you don't incur in any overhead apart from the negligible creation of the protobuffer messages instances.