Implement skeleton network/sync framework.

beacon_node/client/src/client_config.rs

@@ -56,7 +56,7 @@ impl ClientConfig {
         // TODO: Handle list of addresses
         if let Some(listen_address_str) = args.value_of("listen_address") {
             if let Ok(listen_address) = listen_address_str.parse::<IpAddr>() {
-                config.net_conf.listen_address = Some(Vec::new(listen_address));
+                config.net_conf.listen_addresses = Some(vec![listen_address]);
             } else {
                 error!(log, "Invalid IP Address"; "Address" => listen_address_str);
                 return Err("Invalid IP Address");

beacon_node/client/src/error.rs

@@ -1,8 +1,14 @@
 // generates error types
+use network;
 
 use error_chain::{
     error_chain, error_chain_processing, impl_error_chain_kind, impl_error_chain_processed,
     impl_extract_backtrace,
 };
 
-error_chain! {}
+error_chain! {
+   links  {
+       Network(network::error::Error, network::error::ErrorKind);
+   }
+
+}

beacon_node/client/src/lib.rs

@@ -11,9 +11,10 @@ pub use client_types::ClientTypes;
 
 //use beacon_chain::BeaconChain;
 use exit_future::{Exit, Signal};
+use network::Service as NetworkService;
+use slog::o;
 use std::marker::PhantomData;
-//use std::sync::Arc;
+use std::sync::Arc;
-use network::NetworkService;
 use tokio::runtime::TaskExecutor;
 
 /// Main beacon node client service. This provides the connection and initialisation of the clients
@@ -39,11 +40,11 @@ impl<T: ClientTypes> Client<T> {
 
         // TODO: generate a beacon_chain service.
 
-        // start the network service, libp2p and syncing threads
+        // Start the network service, libp2p and syncing threads
         // TODO: Add beacon_chain reference to network parameters
-        let network_config = config.net_config;
+        let network_config = config.net_conf.clone();
-        let network_logger = client.log.new(o!("Service" => "Network"));
+        let network_logger = log.new(o!("Service" => "Network"));
-        let (network, network_send) = NetworkService::new(network_config, network_logger);
+        let (network, network_send) = NetworkService::new(network_config, network_logger)?;
 
         Ok(Client {
             config,

beacon_node/client/src/notifier.rs

@@ -4,7 +4,7 @@ use db::ClientDB;
 use exit_future::Exit;
 use fork_choice::ForkChoice;
 use futures::{Future, Stream};
-use slog::{debug, info};
+use slog::{debug, info, o};
 use slot_clock::SlotClock;
 use std::sync::Arc;
 use std::time::{Duration, Instant};
@@ -26,7 +26,7 @@ pub fn run<T: ClientTypes>(client: &Client<T>, executor: TaskExecutor, exit: Exi
     };
 
     // map error and spawn
-    let log = client.logger();
+    let log = client.log.clone();
     let heartbeat_interval = interval
         .map_err(move |e| debug!(log, "Timer error {}", e))
         .for_each(heartbeat);

beacon_node/libp2p/Cargo.toml

@@ -5,3 +5,6 @@ authors = ["Age Manning <Age@AgeManning.com>"]
 edition = "2018"
 
 [dependencies]
+# SigP repository until PR is merged
+libp2p =  { git = "https://github.com/SigP/rust-libp2p", branch = "gossipsub" }
+slog = "2.4.1"

beacon_node/libp2p/src/lib.rs

@@ -2,10 +2,11 @@
 /// all required libp2p functionality.
 ///
 /// This crate builds and manages the libp2p services required by the beacon node.
-extern crate libp2p;
+mod service;
 
-mod libp2p_service;
+pub use libp2p::{
+    gossipsub::{GossipsubConfig, GossipsubConfigBuilder},
+    PeerId,
+};
 
-pub use libp2p::{GossipsubConfig, PeerId};
+pub use service::Service;
-
-pub use libp2p_service::LibP2PService;

beacon_node/libp2p/src/service.rs

@@ -0,0 +1,11 @@
+use slog::debug;
+
+/// The configuration and state of the libp2p components for the beacon node.
+pub struct Service {}
+
+impl Service {
+    pub fn new(log: slog::Logger) -> Self {
+        debug!(log, "Service starting");
+        Service {}
+    }
+}

beacon_node/network/Cargo.toml

@@ -5,6 +5,11 @@ authors = ["Age Manning <Age@AgeManning.com>"]
 edition = "2018"
 
 [dependencies]
-libp2p =  { git = "../libp2p" }
+libp2p =  { path = "../libp2p" }
 version = { path = "../version" }
 types = { path = "../../eth2/types" }
+sync = { path = "../sync" }
+slog = "2.4.1"
+futures = "0.1.25"
+error-chain = "0.12.0"
+crossbeam-channel = "0.3.8"

beacon_node/network/src/lib.rs

@@ -1,6 +1,9 @@
 /// This crate provides the network server for Lighthouse.
+pub mod error;
+mod message_handler;
+mod messages;
 mod network_config;
 mod service;
 
 pub use network_config::NetworkConfig;
-pub use service::NetworkService;
+pub use service::Service;

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)
+    }
 }

beacon_node/network/src/messages.rs

@@ -1,27 +1,26 @@
-use types::{H256,Slot}
+use libp2p::PeerId;
+use types::{Hash256, Slot};
 
 /// Messages between nodes across the network.
 pub enum NodeMessage {
-
     Status(Status),
     BlockRequest,
 }
 
 pub struct Status {
-        /// Current node version.
+    /// Current node version.
-        version: u8
+    version: u8,
-        /// Genesis Hash.
+    /// Genesis Hash.
-        genesis_hash: H256
+    genesis_hash: Hash256,
-        /// Best known slot number.
+    /// Best known slot number.
-        best_slot: Slot
+    best_slot: Slot,
-        /// Best known slot hash.
+    /// Best known slot hash.
-        best_slot_hash: H256
+    best_slot_hash: Hash256,
 }
 
 /// Types of messages that the network service can receive.
 pub enum NetworkMessage {
     /// Send a message to libp2p service.
-    //TODO: Define typing for messages accross the wire
+    //TODO: Define typing for messages across the wire
-    Send(Node, Message),
+    Send(PeerId, NodeMessage),
 }
-

beacon_node/network/src/network_config.rs

@@ -1,4 +1,4 @@
-use libp2p::gossipsub::{GossipsubConfig, GossipsubConfigBuilder};
+use libp2p::{GossipsubConfig, GossipsubConfigBuilder};
 use std::net::IpAddr;
 use version;
 

beacon_node/network/src/service.rs

@@ -0,0 +1,41 @@
+use crate::error;
+use crate::message_handler::{HandlerMessage, MessageHandler};
+use crate::messages::{NetworkMessage, NodeMessage};
+use crate::NetworkConfig;
+use crossbeam_channel::{unbounded as channel, Sender};
+use futures::sync::oneshot;
+use libp2p::Service as LibP2PService;
+use slog::{debug, info, o, trace, warn, Logger};
+use std::sync::{Arc, Mutex};
+
+/// Service that handles communication between internal services and the libp2p network service.
+pub struct Service {
+    //libp2p_service: Arc<Mutex<LibP2PService>>,
+//libp2p_thread: oneshot::Sender<()>,
+//message_handler: MessageHandler,
+//message_handler_send: Sender<HandlerMessage>,
+}
+
+impl Service {
+    pub fn new(
+        config: NetworkConfig,
+        log: slog::Logger,
+    ) -> error::Result<(Arc<Self>, Sender<NetworkMessage>)> {
+        debug!(log, "Service starting");
+        let (network_send, network_recv) = channel::<NetworkMessage>();
+
+        // launch message handler thread
+        let message_handler_log = log.new(o!("Service" => "MessageHandler"));
+        let message_handler_send = MessageHandler::new(message_handler_log);
+
+        // launch libp2p service
+        let libp2p_log = log.new(o!("Service" => "Libp2p"));
+        let libp2p_service = LibP2PService::new(libp2p_log);
+
+        // TODO: Spawn thread to handle libp2p messages and pass to message handler thread.
+
+        let network = Service {};
+
+        Ok((Arc::new(network), network_send))
+    }
+}

beacon_node/sync/Cargo.toml

@@ -6,4 +6,4 @@ edition = "2018"
 
 [dependencies]
 types = { path = "../../eth2/types" }
-libp2p =  { git = "../libp2p/" }
+libp2p =  { path = "../libp2p" }

beacon_node/sync/src/lib.rs

@@ -3,8 +3,9 @@
 /// Stores the various syncing methods for the beacon chain.
 mod simple_sync;
 
-pub use crate::SimpleSync;
+pub use simple_sync::SimpleSync;
 
+/// Currently implemented sync methods.
 pub enum SyncMethod {
     SimpleSync,
 }

beacon_node/sync/src/simple_sync.rs

@@ -1,10 +1,11 @@
+use libp2p::PeerId;
 use std::collections::HashMap;
-use types::{Slot, H256};
+use types::{Hash256, Slot};
 
 /// Keeps track of syncing information for known connected peers.
 pub struct PeerSyncInfo {
     best_slot: Slot,
-    best_slot_hash: H256,
+    best_slot_hash: Hash256,
 }
 
 /// The current syncing state.
@@ -16,7 +17,17 @@ pub enum SyncState {
 
 /// Simple Syncing protocol.
 pub struct SimpleSync {
-    genesis_hash: H256,
+    genesis_hash: Hash256,
     known_peers: HashMap<PeerId, PeerSyncInfo>,
     state: SyncState,
 }
+
+impl SimpleSync {
+    pub fn new(genesis_hash: Hash256) -> Self {
+        SimpleSync {
+            genesis_hash,
+            known_peers: HashMap::new(),
+            state: SyncState::Idle,
+        }
+    }
+}