Capability Discovery FURPS

Functionality

Libp2p Kad-DHT nodes can advertise their own addresses and capabilities in a signed record
Libp2p Kad-DHT nodes can discover and validate the signed records of random, advertised peers
Libp2p Kad-DHT nodes can filter discovered records for specific capabilities
Libp2p nodes can use a general capability discovery API to discover peers with specific capabilities
The capability discovery protocol adapts DISC-NG for Kad-DHT to ensure efficient capability discovery
Client nodes can discover addresses of peers with specific capabilities without participating in the Kad-DHT

The capability discovery protocol is published in a specification
A PoC implementation accompanies the published protocol
The PoC implementation contains instructions to allow open dogfooding
A forum post introduces the new protocol, explains privacy tradeoffs, and links to spec and PoC implementation
A Kad-DHT discovery protocol is published in a specification
The Kad-DHT discovery API is available in Nim
The reference Kad-DHT discovery implementation is completed in Nim over the nim-libp2p Kad-DHT implementation
The reference capability discovery implementation is completed in Nim over the nim-libp2p Kad-DHT implementation
Capability discovery is integrated in Logos Delivery to replace discv5 discovery
The capability discovery module is available as a Logos Core module
The capability discovery API is published in a specification
An extensible peer record library allows application modules to create and maintain discoverable records
Capability discovery is integrated into chat2mix application for dogfooding

Capability discovery provides comparable performance to discv5 when all nodes support the same service
Capability discovery performs better than discv5 to find a sparse service

Capability discovery can be benchmarked in large scale Delivery module simulations
Capability discovery can be benchmarked in a standalone p2p capability discovery module