Whispers don’t have channel context, so you can’t tell if someone’s a sub from the whisper. The CAP * ACK is the acknowledgement to your CAP REQ. (CAPability REQuest ACKnowledged, enabled.)
Whispers don’t have channel context, so you can’t tell if someone’s a sub from the whisper. The CAP * ACK is the acknowledgement to your CAP REQ. (CAPability REQuest ACKnowledged, enabled.)