[WIP] QR codes and symmetric encryption for broadcast channels #7042
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…in a 'member added' message.
…ually add a contact to a broadcast list, don't have unpromoted broadcast lists, make basic multi-device, inviter side, work
…another one where I couldn't find the problem
…oadcast_multidevice
…W - fix test_broadcasts_name_and_avatar().
…hown on Bob's device
…an directly in the QR code
…emove redundant check for grpid.is_some() If grpid is none, the group/brodacast name isn't used, anyways
…essage was encrypted
…'s 1:1 chat a recipient
Turns out that Alice reacts to a request-v2 message in exactly the same way as to a request-with-auth message. So, no need to distinguish here.
… (contact/group/broadcast)
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…xpensive-to-compute s2k algos
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This will make it possible to create invite-QR codes for broadcast channels, and make them symmetrically end-to-end encrypted.
I explained the technical design at #6884 (comment).
Here is a draft of the protocol when both sides have multi-device: