Has anyone thought about the marriage of WebRTC and Nostr?

If Nostr adds audio and video calling to its message and money transfer services then phone numbers are obsolete. Like a decentralized, open-sourced Whatsapp that can maintain anonymity.

From my limited understanding, WebRTC requires a "Signaling" server to manage the peer-to-peer connection.

Would this become a client-side integration?

A Data Vending Machine?

Or is there another way to do this entirely?