XEP-0379: Pre-Authenticated Roster Subscription

[ge0rg]

It would be great to have support in Monal for XEP-0379 (and possibly also XEP-0401: Easy User Onboarding.

The suggested components are as follows:

• Implement QR-code sharing of the user's JID (primary account / choice of accounts), including a PARS token as query parameter
• implement checking and auto-allowing of incoming presence subscriptions with a valid <preauth token="..."/>
• implement an OS-level handler for xmpp:JID URIs and possibly also other landing pages (https://yax.im/i/#JID)
• pass on the preauth query parameter from those JIDs to the outgoing subscription request

[tmolitor-stud-tu]

@ge0rg thanks for your description what to do. these steps are very helpful to understand how those xeps work.

[ge0rg]

There was an unfortunate divergence between the XEP and what got implemented in prosody and yaxim, see xsf/xeps#874 for background info

The implemented variant is documented here: https://docs.modernxmpp.org/client/invites/

Prosody has gone even further and made it a sleaker UX, see https://blog.prosody.im/great-invitations/

[tmolitor-stud-tu]

implemented now in monal 5.3