Behaviour for handling inbound Libp2p streams.

Modules implementing this behaviour are used to handle incoming streams for specific protocols (like /ipfs/id/1.0.0 or custom application protocols).

Usage

When a remote peer initiates a new stream, the Libp2p.ConnectionV2 process negotiates the protocol using Multistream-select. If a handler is registered for the agreed-upon protocol, its handle_stream/2 callback is invoked.

The handler receives:

• The connection pid (to send data back).
• The stream_id (identifying the specific Yamux stream).