1 use std::collections::hash_map::RandomState;
2 use std::hash::{BuildHasher, Hasher};
3 use std::net::SocketAddr;
6 use std::time::{Duration, Instant};
8 use bitcoin::hashes::hex::ToHex;
9 use bitcoin::secp256k1::PublicKey;
11 use lightning::ln::peer_handler::{
12 ErroringMessageHandler, IgnoringMessageHandler, MessageHandler, PeerManager,
14 use lightning::routing::gossip::NetworkGraph;
15 use lightning::sign::KeysManager;
16 use lightning::util::logger::Logger;
17 use tokio::sync::mpsc;
20 use crate::downloader::GossipRouter;
21 use crate::types::{GossipMessage, GossipPeerManager};
23 pub(crate) async fn download_gossip<L: Deref + Clone + Send + Sync + 'static>(persistence_sender: mpsc::Sender<GossipMessage>,
24 completion_sender: mpsc::Sender<()>,
25 network_graph: Arc<NetworkGraph<L>>,
27 ) where L::Target: Logger {
28 let mut key = [42; 32];
29 let mut random_data = [43; 32];
30 // Get something psuedo-random from std.
31 let mut key_hasher = RandomState::new().build_hasher();
32 key_hasher.write_u8(1);
33 key[0..8].copy_from_slice(&key_hasher.finish().to_ne_bytes());
34 let mut rand_hasher = RandomState::new().build_hasher();
35 rand_hasher.write_u8(2);
36 random_data[0..8].copy_from_slice(&rand_hasher.finish().to_ne_bytes());
38 let keys_manager = Arc::new(KeysManager::new(&key, 0xdeadbeef, 0xdeadbeef));
40 let router = Arc::new(GossipRouter::new(network_graph, persistence_sender.clone(), logger.clone()));
42 let message_handler = MessageHandler {
43 chan_handler: ErroringMessageHandler::new(),
44 route_handler: Arc::clone(&router),
45 onion_message_handler: IgnoringMessageHandler {},
46 custom_message_handler: IgnoringMessageHandler {},
48 let peer_handler = Arc::new(PeerManager::new(
55 router.set_pm(Arc::clone(&peer_handler));
57 let ph_timer = Arc::clone(&peer_handler);
58 tokio::spawn(async move {
59 let mut intvl = tokio::time::interval(Duration::from_secs(10));
62 ph_timer.timer_tick_occurred();
66 println!("Connecting to Lightning peers...");
67 let peers = config::ln_peers();
68 let mut connected_peer_count = 0;
70 for current_peer in peers {
71 let initial_connection_succeeded = connect_peer(current_peer, Arc::clone(&peer_handler)).await;
72 if initial_connection_succeeded {
73 connected_peer_count += 1;
77 if connected_peer_count < 1 {
78 panic!("Failed to connect to any peer.");
81 println!("Connected to {} Lightning peers!", connected_peer_count);
83 tokio::spawn(async move {
84 let mut previous_announcement_count = 0u64;
85 let mut previous_update_count = 0u64;
86 let mut is_caught_up_with_gossip = false;
89 let mut latest_new_gossip_time = Instant::now();
90 let mut needs_to_notify_persister = false;
93 i += 1; // count the background activity
94 let sleep = tokio::time::sleep(Duration::from_secs(5));
98 let counter = router.counter.read().unwrap();
99 let total_message_count = counter.channel_announcements + counter.channel_updates;
100 let new_message_count = total_message_count - previous_announcement_count - previous_update_count;
102 let was_previously_caught_up_with_gossip = is_caught_up_with_gossip;
103 // TODO: make new message threshold (20) adjust based on connected peer count
104 is_caught_up_with_gossip = new_message_count < 20 && previous_announcement_count > 0 && previous_update_count > 0;
105 if new_message_count > 0 {
106 latest_new_gossip_time = Instant::now();
109 // if we either aren't caught up, or just stopped/started being caught up
110 if !is_caught_up_with_gossip || (is_caught_up_with_gossip != was_previously_caught_up_with_gossip) {
112 "gossip count (iteration {}): {} (delta: {}):\n\tannouncements: {}\n\t\tmismatched scripts: {}\n\tupdates: {}\n\t\tno HTLC max: {}\n",
116 counter.channel_announcements,
117 counter.channel_announcements_with_mismatched_scripts,
118 counter.channel_updates,
119 counter.channel_updates_without_htlc_max_msats
122 println!("Monitoring for gossip…")
125 if is_caught_up_with_gossip && !was_previously_caught_up_with_gossip {
126 println!("caught up with gossip!");
127 needs_to_notify_persister = true;
128 } else if !is_caught_up_with_gossip && was_previously_caught_up_with_gossip {
129 println!("Received new messages since catching up with gossip!");
132 let continuous_caught_up_duration = latest_new_gossip_time.elapsed();
133 if continuous_caught_up_duration.as_secs() > 600 {
134 eprintln!("No new gossip messages in 10 minutes! Something's amiss!");
137 previous_announcement_count = counter.channel_announcements;
138 previous_update_count = counter.channel_updates;
141 if needs_to_notify_persister {
142 needs_to_notify_persister = false;
143 completion_sender.send(()).await.unwrap();
149 async fn connect_peer<L: Deref + Clone + Send + Sync + 'static>(current_peer: (PublicKey, SocketAddr), peer_manager: GossipPeerManager<L>) -> bool where L::Target: Logger {
150 eprintln!("Connecting to peer {}@{}...", current_peer.0.to_hex(), current_peer.1.to_string());
151 let connection = lightning_net_tokio::connect_outbound(
152 Arc::clone(&peer_manager),
156 if let Some(disconnection_future) = connection {
157 eprintln!("Connected to peer {}@{}!", current_peer.0.to_hex(), current_peer.1.to_string());
158 tokio::spawn(async move {
159 disconnection_future.await;
161 eprintln!("Reconnecting to peer {}@{}...", current_peer.0.to_hex(), current_peer.1.to_string());
162 if let Some(disconnection_future) = lightning_net_tokio::connect_outbound(
163 Arc::clone(&peer_manager),
167 disconnection_future.await;
169 tokio::time::sleep(Duration::from_secs(10)).await;
174 eprintln!("Failed to connect to peer {}@{}", current_peer.0.to_hex(), current_peer.1.to_string());