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Reference that transaction IDs may be used to echo

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Fixes https://github.com/matrix-org/matrix-doc/issues/1462
This commit is contained in:
Travis Ralston 2018-08-29 23:18:10 -06:00
parent fd7cb22a28
commit bd93481013
1 changed files with 8 additions and 3 deletions
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specification/modules/instant_messaging.rst
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@ -167,9 +167,14 @@ message which they receive from the event stream. The echo of the same message
from the event stream is referred to as "remote echo". Both echoes need to be from the event stream is referred to as "remote echo". Both echoes need to be
identified as the same message in order to prevent duplicate messages being identified as the same message in order to prevent duplicate messages being
displayed. Ideally this pairing would occur transparently to the user: the UI displayed. Ideally this pairing would occur transparently to the user: the UI
would not flicker as it transitions from local to remote. Flickering cannot be would not flicker as it transitions from local to remote. Flickering can be
fully avoided in the current client-server API. Two scenarios need to be reduced through clients making use of the transaction ID they used to send
considered: a particular event. The transaction ID used will be included in the event's
``unsigned`` data as ``transaction_id`` when it arrives through the event stream.
Clients unable to make use of the transaction ID are more likely to experience
flickering due to the following two scenarios, however the effect can be mitigated
to a degree:
- The client sends a message and the remote echo arrives on the event stream - The client sends a message and the remote echo arrives on the event stream
*after* the request to send the message completes. *after* the request to send the message completes.