Subscribing to Tracks

Sending a SUBSCRIBE

To subscribe to a track:

1. Enter the namespace (e.g., ["chat"])
2. Enter the track name (e.g., "messages")
3. Select a filter type:
   • LatestObject — start from the latest available object
   • NextGroupStart — wait for the next group boundary
   • AbsoluteStart — start from group 0, object 0
   • AbsoluteRange — specific range of groups/objects
4. Click Subscribe

The subscription lifecycle

SUBSCRIBE (sent) → SUBSCRIBE_OK (received) → objects flow → UNSUBSCRIBE (sent) → PUBLISH_DONE (received)

moqtap shows each state transition in the control message log with timestamps.

Viewing objects

Objects arrive on unidirectional QUIC streams (subgroup streams) or datagrams. Each object shows:

• Group ID and Object ID
• Subgroup assignment
• Publisher priority and status
• Payload — auto-detected as text, JSON, or binary

Unsubscribing

Click Unsubscribe or send an UNSUBSCRIBE message for the request ID. The relay responds with PUBLISH_DONE.