voistr (pronounced like: VOYST-er) is an experimental nostr p2p softphone and real-time communication agent. It uses nostr relays to exchange encrypted WebRTC signaling messages.
How it works:
- Peers connect to some nostr relays which accept encrypted NIP-44 events, and send an event to join a room.
- Peers send NIP-44 encrypted events containing the WebRTC offers and ICE candidates. This is the handshake, made possible by the nostr relays which act as WebRTC signaling servers.
- Once the offer is accepted, the WebRTC connection is established. A data channel is opened, as well as media tracks to exchange encoded (OPUS) audio data. The data channel is used for the voistr protocol, which uses NIP-44 seal events with JSON payloads.
Right now there is no relays configuration and to make testing easier, voistr uses a predetermined list of relays that work well with encrypted events.
If you want to try it out and help with the testing, reply here, that'd be much appreciated.
#voistr #nostr #softphone #nosphone #webrtc #opus
voistr: a softphone for Nostr