Implement skeleton network/sync framework.

beacon_node/network/src/message_handler.rs

@@ -1,8 +1,14 @@
-use crate::node_message::NodeMessage;
+use crate::error;
+use crate::messages::NodeMessage;
+use crossbeam_channel::{unbounded as channel, Sender};
+use libp2p::PeerId;
+use slog::debug;
+use sync::SimpleSync;
+use types::Hash256;
 
 /// Handles messages received from the network and client and organises syncing.
 pub struct MessageHandler {
-    sync: Syncer,
+    sync: SimpleSync,
     //TODO: Implement beacon chain
     //chain: BeaconChain
 }
@@ -14,5 +20,25 @@ pub enum HandlerMessage {
     /// Peer has disconnected,
     PeerDisconnected(PeerId),
     /// A Node message has been received.
-    Message(Peer, NodeMessage),
+    Message(PeerId, NodeMessage),
+}
+
+impl MessageHandler {
+    /// Initializes and runs the MessageHandler.
+    pub fn new(log: slog::Logger) -> error::Result<Sender<HandlerMessage>> {
+        debug!(log, "Service starting");
+
+        let (handler_send, handler_recv) = channel();
+
+        // Initialise sync and begin processing in thread
+        //TODO: Load genesis from BeaconChain
+        let temp_genesis = Hash256::zero();
+        let sync = SimpleSync::new(temp_genesis);
+
+        let handler = MessageHandler { sync };
+
+        // spawn handler thread
+
+        Ok(handler_send)
+    }
 }