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spaced4ndy
2025-10-22 18:26:21 +04:00
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docs/rfcs/2025-10-20-chat-relays.md
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@@ -181,6 +181,59 @@ create participant M as Member
O -->> M: 8. Share group short link<br>(social, out-of-band)
```
### Update: Establishing connection pairs
- [Channels forwarding rfc](./2025-08-11-channels-forwarding.md) discussed creating connections pairs between relay and members with different priority for passing regular messages and for relay responding to member requests.
In protocol for adding chat relays we can replace explicit notification/acknowledgement steps with relay link test by owner, establishing second connection via relay link to be used for passing messages.
- Client can "know" link that will be created before creating it on server - so we can add it to profile before adding profile to group short link data.
TODO agent prepare connection api to return link that will be created.
- Pass only link in invitation step for relay to retrieve group profile and check it before accepting.
```mermaid
sequenceDiagram
participant O as Owner
participant OSMP as Owner's<br>SMP server
participant R as Chat relay(s)
participant RSMP as Chat relays'<br>SMP server(s)
note over O, RSMP: Owner creates new group, adds chat relays
O ->> O: 1. Create new group<br>(local, user action)
O ->> O: 2. Prepare group link,<br>owner key (local, agent)
O ->> O: 3. Add link, owner key<br>to group profile<br>(local, automatic)
O ->> OSMP: 4. Create group link<br>with profile as data
O ->> O: 5. Choose chat relays<br>(local, automatic/user choice)
par With each relay
O ->> R: 6. Contact request<br>(x.grp.relay.inv<br>incl. group link)
R ->> OSMP: 7. Retrive group link data
R ->> R: 8. Validate group profile,<br>verify profile signature
R ->> RSMP: 9. Create relay link
R ->> O: 10. Accept request<br>(x.grp.relay.acpt<br>incl. relay link)
note over O, R: Priority connection<br>with relay is ready
O ->> OSMP: 11. Update short link<br>(add relay link)
O ->> R: 12. Connect via relay link
note over O, R: Owner: Messages connection with relay is ready,<br>relay link is tested<br>Relay: Relay link is active
end
create participant M as Member
O -->> M: 13. Share group short link<br>(social, out-of-band)
note over O, M: New member connects
M ->> OSMP: 14. Retrieve short link data
M ->> R: 15. Connect via relay link(s)
note over O, M: Message forwarding
O ->> R: 16. Send message
R ->> M: 17. Forward message
M ->> M: 18. Deduplicate message
```
## Protocol for removing chat relay from group, restoring connection to group
```mermaid