momo-jun commented on code in PR #15497:
URL: https://github.com/apache/pulsar/pull/15497#discussion_r867661788
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site2/docs/developing-binary-protocol.md:
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@@ -418,7 +418,24 @@ Parameters:
* `txnid_least_bits` -> *(optional)* The ID of the transaction opened in a TC,
`txnid_most_bits` and `txnid_least_bits`uniquely identify a transaction.
* `request_id` -> *(optional)* ID for handling response and timeout.
-
+
+##### Command CommandAckResponse
+
+This is the broker's response to ack request by the client. It contains the
`consumer_id` sent in the request.
+If transaction is used, it will also contain the transactionId and requestID
sent in the request.
+The client will process the specific request according to the request ID.
Review Comment:
```suggestion
The client processes the specific request according to the Request ID.
```
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