Add libp2p transport - tcp/ws/secio and multiplexing.

beacon_node/libp2p/src/lib.rs

@@ -2,11 +2,12 @@
 /// all required libp2p functionality.
 ///
 /// This crate builds and manages the libp2p services required by the beacon node.
+mod network_config;
 mod service;
 
 pub use libp2p::{
     gossipsub::{GossipsubConfig, GossipsubConfigBuilder},
     PeerId,
 };
-
+pub use network_config::NetworkConfig;
 pub use service::Service;