docs: Document defaults #382

libp2p.go

@@ -27,8 +27,27 @@ func ChainOptions(opts ...Option) Option {
 	}
 }
 
-// New constructs a new libp2p node with the given options (falling back on
+// New constructs a new libp2p node with the given options, falling back on
-// reasonable defaults).
+// reasonable defaults. The defaults are:
+//
+// - If no transport and listen addresses are provided, the node listens to
+// the multiaddresses "/ip4/0.0.0.0/tcp/0" and "/ip6/::/tcp/0";
+//
+// - If no transport options are provided, the node uses TPC and websocket
+// transport protocols;
+//
+// - If no multiplexer configuration is provided, the node is configured by
+// default to use the "yamux/1.0.0" and "mplux/6.7.0" stream connection
+// multiplexers;
+//
+// - If no security transport is provided, the host uses the go-libp2p's secio
+// encrypted transport to encrypt all traffic;
+//
+// - If no peer identity is provided, it generates a random RSA 2048 key-par
+// and derives a new identity from it;
+//
+// - If no peerstore is provided, the host is initialized with an empty
+// peerstore.
 //
 // Canceling the passed context will stop the returned libp2p node.
 func New(ctx context.Context, opts ...Option) (host.Host, error) {