Move p2p listener logic into `notify` module

examples/listener.rs

@@ -1,41 +1,15 @@
-extern crate bitcoin;
 extern crate electrs;
-extern crate error_chain;
 
-use bitcoin::network::constants::Network;
-use bitcoin::network::message::NetworkMessage;
-use bitcoin::network::socket::Socket;
+#[macro_use]
+extern crate log;
 
-use electrs::errors::*;
-
-fn run() -> Result<()> {
-    // Open socket
-    let mut sock = Socket::new(Network::Bitcoin);
-    sock.connect("127.0.0.1", 8333)
-        .chain_err(|| "failed to connect to node")?;
-
-    let mut outgoing = vec![sock.version_message(0).unwrap()];
-    loop {
-        for msg in outgoing.split_off(0) {
-            eprintln!("send {:?}", msg);
-            sock.send_message(msg.clone())
-                .chain_err(|| format!("failed to send {:?}", msg))?;
-        }
-        // Receive new message
-        let msg = sock
-            .receive_message()
-            .chain_err(|| "failed to receive p2p message")?;
-
-        match msg {
-            NetworkMessage::Alert(_) => continue, // deprecated
-            NetworkMessage::Version(_) => outgoing.push(NetworkMessage::Verack),
-            NetworkMessage::Ping(nonce) => outgoing.push(NetworkMessage::Pong(nonce)),
-            _ => (),
-        };
-        eprintln!("recv {:?}", msg);
-    }
-}
+use electrs::config::Config;
+use electrs::notify;
 
 fn main() {
-    run().expect("p2p listener failed");
+    let _ = Config::from_args();
+    let rx = notify::run().into_receiver();
+    for msg in rx.iter() {
+        info!("{:?}", msg)
+    }
 }

src/lib.rs

@@ -42,6 +42,7 @@ pub mod fake;
 pub mod index;
 pub mod mempool;
 pub mod metrics;
+pub mod notify;
 pub mod query;
 pub mod rpc;
 pub mod signal;

src/notify.rs

@@ -0,0 +1,50 @@
+use bitcoin::network::constants::Network;
+use bitcoin::network::message::NetworkMessage;
+use bitcoin::network::socket::Socket;
+
+use util;
+
+pub fn run() -> util::Channel<NetworkMessage> {
+    let chan = util::Channel::new();
+    let tx = chan.sender();
+
+    util::spawn_thread("p2p", move || loop {
+        // TODO: support testnet and regtest as well.
+        let mut sock = Socket::new(Network::Bitcoin);
+        if let Err(e) = sock.connect("127.0.0.1", 8333) {
+            warn!("failed to connect to node: {}", e);
+            continue;
+        }
+        let mut outgoing = vec![sock.version_message(0).unwrap()];
+        loop {
+            for msg in outgoing.split_off(0) {
+                debug!("send {:?}", msg);
+                if let Err(e) = sock.send_message(msg.clone()) {
+                    warn!("failed to connect to node: {}", e);
+                    break;
+                }
+            }
+            // Receive new message
+            let msg = match sock.receive_message() {
+                Ok(msg) => msg,
+                Err(e) => {
+                    warn!("failed to receive p2p message: {}", e);
+                    break;
+                }
+            };
+            match msg {
+                NetworkMessage::Alert(_) => continue, // deprecated
+                NetworkMessage::Version(_) => outgoing.push(NetworkMessage::Verack),
+                NetworkMessage::Ping(nonce) => outgoing.push(NetworkMessage::Pong(nonce)),
+                _ => (),
+            };
+            debug!("recv {:?}", msg);
+            if tx.send(msg).is_err() {
+                warn!("failed to connect to node");
+                return;
+            }
+        }
+    });
+
+    chan
+}