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+# Checklist for Microservices
+
+Use the following checklist when dealing with a microservices architecture internally with DIT. This guide is intended for use among DIT software developers. 
+
+| ID     | Name                                           | Description                                                  |
+| ------ | ---------------------------------------------- | ------------------------------------------------------------ |
+| SMR-1  | Authentication                                 | Check the presence of these two parameters in the request headers:<br />* X-Auth-User<br />* X-Auth-Signature<br /><br />Verify the signature in X-Auth-Signature with a given public key. |
+| SMR-2  | Database per service pattern                   | Separate your microservice's database from the rest of the services. |
+| SMR-3  | Events: Use Cloud Native Events                | Use Cloud Native Events envelope format to publish messages to the message broker.<br />For the data property, use JSONAPI Specs (see SMR-9). |
+| SMR-4  | Events: Idempotent Consumers                   | Make your consumers idempotent by processing messages with the same event id once. |
+| SMR-5  | Events: Transactional Outbox                   | Make publishing of events atomic along with operation applied on the corresponding resource. |
+| SMR-6  | Events: Polling Publisher Pattern              | Have a worker that uses polling to read unpublished messages and push them to the message broker |
+| SMR-7  | Events: Single Exchange, Multiple Routing Keys | Use a single exchange to publish message to a message broker, but utilize routing keys. |
+| SMR-8  | Events: Follow Naming Conventions              | Use the following convention to name your routing keys: Annex 1.1<br />Use the followiing convetnions to name your queues: Annex 1.2 |
+| SMR-9  | REST: Adopt JSON API Specs                     | Fully adopt the JSONAPI Specs for responses.<br />           |
+| SMR-10 | REST: JSONAPI Pagination Extension             | Use the following JSONAPI extension for pagination in responses: See Annex 2 |
+| SMR-11 | REST: JSONAPI Request Extension                | Use the following JSONAPI extension for requests: Annex 3    |
+| SMR-12 | REST: Async Request Reply Pattern              | Use the Asynchronous Request Reply Pattern when dealing with computationally-intesive tasks that spans multiple microservices. See Annex 4.<br />The proper HTTP Code for this response is 202 ACCEPTED |
+| SMR-13 | REST: Use Camel Case for JSONAPI Member Names  | Use Camel Case for naming members in JSONAPI specs.          |
+| SMR-14 | REST: Use Idempotency Key                      | For POST, DELETE and PATCH requests, require header Idempotency-Key to be present. Process requests with the same idempotency key only once. |
+| SMR-15 | Use Open API for REST Documentation            | Use Open API >= 3 to document REST endpoint                  |
+| SMR-16 | Use AsyncAPI For Events Documentation          | Use AsyncAPI >= 2 to document Events.                        |
+
+
+
+
+## Annexes
+
+### Annex 1
+
+1. [api name]-api.[resource name in plural form].[operation type in past tense]
+   Example: *users-api.users.created
+2. [api name]-api.[routing key of the listenting queue]
+   Example: orders-api.users-api.users.created
+
+### Annex 2
+
+```JSON
+{
+  meta: {
+    page: {
+      totalPage: "integer"
+      count: "integer",
+      limitValue:	"integer",
+      currentPage:	"integer"
+    }
+  }
+}
+```
+
+
+
+### Annex 3
+
+```json
+{
+  data: {...request_payload}
+}
+```
+
+
+
+### Annex 4
+
+```JSON
+{
+  data: {
+    id: "string",
+    type: "async_request_responses",
+    attributes: {
+      retryAt: "string(datetime)",
+      location: "string"
+    }
+  }
+}
+```
+