Retry to-device messages

[dbkr]

Your use case

Mirroring element-hq/element-web#12851 from web: we should make sure that we retry to-device messages. New impl on web saves them in a queue to persistent storage to be sent when they can be.

Have you considered any alternatives?

No response

Additional context

No response

Are you willing to provide a PR?

No

[richvdh]

Note that this also affects events that are sent when the device is in airplane mode. The events themeselves are queued up; the key shares are simply discarded.

[giomfo]

@richvdh When we observed some UTD from android sessions. Is there a specific logs to check to confirm the UTD is relative to this issue or not?

[richvdh]

I think there will likely be something like this in the sender's log:

2022-11-09T07:42:55*539GMT+00:00Z 63 E/ /CRYPTO/MXMegolmEncryption: shareUserDevicesKey() : Failed to share <grImQSHhxflgfJfX8qzKouKx5BIao3rJZWIK7A9VL70>

[jdauphant]

Any news an when this will be implemented?
This will have a major impact reducing on UTD ?

Cc @giomfo @Florian14 @yostyle

[BillCarsonFr]

Closing, as will be fixed by intregrating the rust SDK

[dead10ck]

Closing, as will be fixed by intregrating the rust SDK

Is that done yet, though?

[Florian14]

Closing, as will be fixed by intregrating the rust SDK

Is that done yet, though?

Not yet, all the changes are on this branch and should be merged soon into develop.