Calls: use all relays' TURN servers, not just one

WofWca · June 6, 2026, 1:24pm

Our ice_servers() function only returns the TURN server of one of the relays

deltachat-jsonrpc/src/api.rs

bd6c9908e


      
          /// Returns JSON with ICE servers, to be used for WebRTC video calls.
          async fn ice_servers(&self, account_id: u32) -> Result<String> {
              let ctx = self.get_context(account_id).await?;
              ice_servers(&ctx).await
          }

But maybe we should return all of the relay’s TURN servers, and make it up to the WebRTC agent to choose the best? Especially if one of the relay’s TURN server is returned by the relay but is not working (this came up in).

Is there anything against this?

For reference, there was a similar MR for quota: feat: connectivity view: quota for all transports by Simon-Laux · Pull Request #7630 · chatmail/core · GitHub.
Is turning the metadata field into a BTreeMap again the way to go?