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  1. Should PubSub APIs be used for async API communication between Building Blocks? Ex: Registration BB consuming Pay BB Batch transfer API to disburse benefits to a list of beneficiaries.

  2. (15) Do you think that any of the documentation in Confluence and Gitbook and Github points to BB integration scenarios? Context: All flow/UML diagrams have missing actors for applications (sub-systems or the underlying service producing the REST API)

    1. Attempted Answer: Addressing remarks diagram shows an arrow between Information System A and a system for mapping protocol headers with the arrow labelled as Headers to be transformed. Can this be elabored?

  3. (16) If X-Callback-URL in Pay-BB API is not being passed by the Room (receiving the publish API call) to the underlying REST API, then how do we map the callback to the pushURL specified in the event type subscription call to SS04(Pay-BB)? There are no references to implementer documentation in the demo or in the documentation. The question is elaborated through the below diagram :-

    1. Attempted Answer: Addressing remarks diagram shows an arrow between Information System A and a system for mapping protocol headers with the arrow labelled as Headers to be transformed. Can this be elabored?

    2. Alternative attempted answer: Consume Get subscribtion API(IM BB API) for event type batch transfer from bulk processor or IMBB transformer service. Get the registered push URL and set it as a batch transfer callback URL config through a new API so that batch transaction x-callback-url header can be made
      non mandatory.

  4. (17)a) Is Sandbox team maintaining the Playground environment?
    b) What is the impact of playground environments being migrated?
    c) Can the team maintaining the Playground environment (having IMBB installed & configured as per the demo video) share the Postman environment file for IMBB or a list of URLs & the list of secrets for accessing UI, creating rooms, creating event types, etc?

  5. (1) Please confirm that the Owners in the diagram are ministries / registering institutions. Ex:- Registration BB publishing and PayBB subscribing. In the case of callback responses, isn't PayBB publishing and Registration BB subscribing. For this communication, is it fair to assume that both Registration BB and Pay BB has to create separate rooms?

    1. Definitive answer is outstanding.

    2. Attempted answer:
      Event Type creation with Message schema is part of Room creation and not part of subsystem creation. Rooms are linked to Subsystems through Managers. If BatchTransfer API is in a sub-system of Pay-BB member, the Manager for G2P-Pay Room links the room to the sub-system. Event Type Batch Transfer API is then inside the G2P-Pay room.

    3. Based on assumptions made from watching the video and reading documentation, SS2(REG-BB) is subscribing to BatchTransfer eventType with pushUrl specified. When SS2(REG-BB) request/event publishes to SS4/PAY-BB, then callback goes to that pushURL and a second room creation is not required. So both publishing messages and subscription to the BatchTransfer event type can be done by SS2(REG-BB).

    4. 1a: How would a different SS (ex: RegistrationBB, SS2) publish an event to Pay-BB/SS4? OR
      Is Sub-System(Service) Access shown in first video giving indirect access for one SS to publish events to a room of another SS?

      1. Attempted Answer: Yes, service access has less to do with rooms and more to do with sub-system with REST API access. Perhaps around 17:16 in the first video or not clearly shown in the video.

    5. 1b: How is PatientPortal Room (linked with a Manager from SS4 subsystem) being used in SS2

      1. Attempted Answer: Based on the assumptions from previous answer, these are done through sub-system(service) access which is indirectly linked to Rooms through Managers.

    6. 1c: Will Schema validation one day provide aggregated errors related to mandatory fields, field data type failures, field length validations?

    7. 1d: Would subscribing with pushURL get them the response from PayBB to RegBB?
      Attempted Answer: I don't think a separate room is required on RegBB for async callbacks from PayBB to RegBB.

    8. 1e (Promoted to top level question number 16): Refer Q16.

  6. Why specify REST API name once in Subsystem and do a similar step during EventType registration

    1. Attempted Answer: Event Type Schema is the request body schema where REST API defined in SubSystem is not related to message schema validation. If you publish a message that doesn't match with the schema, event is rejected.

  7. (4) Which API or configuration to use to subscribe to event type? We can't find these in published Service APIs.

    1. Answer: We have found the API in the demo.

    2. Follow up question 4b: Where can we find the IM-BB Postman Collection? There are several disconnects between shared Open API specifications and Postman collection and we would prefer to use the Postman collections in the demo video.

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