1 use std::collections::hash_map::RandomState;
2 use std::hash::{BuildHasher, Hasher};
3 use std::net::SocketAddr;
5 use std::time::{Duration, Instant};
7 use bitcoin::hashes::hex::ToHex;
8 use bitcoin::secp256k1::{PublicKey, SecretKey};
10 use lightning::ln::peer_handler::{
11 ErroringMessageHandler, IgnoringMessageHandler, MessageHandler, PeerManager,
13 use lightning::routing::gossip::NetworkGraph;
14 use tokio::sync::mpsc;
16 use crate::{config, TestLogger};
17 use crate::downloader::GossipRouter;
18 use crate::types::{GossipMessage, GossipPeerManager};
20 pub(crate) async fn download_gossip(persistence_sender: mpsc::Sender<GossipMessage>,
21 completion_sender: mpsc::Sender<()>,
22 network_graph: Arc<NetworkGraph<TestLogger>>) {
23 let mut key = [42; 32];
24 let mut random_data = [43; 32];
25 // Get something psuedo-random from std.
26 let mut key_hasher = RandomState::new().build_hasher();
27 key_hasher.write_u8(1);
28 key[0..8].copy_from_slice(&key_hasher.finish().to_ne_bytes());
29 let mut rand_hasher = RandomState::new().build_hasher();
30 rand_hasher.write_u8(2);
31 random_data[0..8].copy_from_slice(&rand_hasher.finish().to_ne_bytes());
33 let our_node_secret = SecretKey::from_slice(&key).unwrap();
34 let router = Arc::new(GossipRouter::new(network_graph, persistence_sender.clone()));
36 let message_handler = MessageHandler {
37 chan_handler: ErroringMessageHandler::new(),
38 route_handler: Arc::clone(&router),
40 let peer_handler = Arc::new(PeerManager::new(
45 IgnoringMessageHandler {},
48 println!("Connecting to Lightning peers...");
49 let peers = config::ln_peers();
50 let mut connected_peer_count = 0;
52 for current_peer in peers {
53 let initial_connection_succeeded = connect_peer(current_peer, Arc::clone(&peer_handler)).await;
54 if initial_connection_succeeded {
55 connected_peer_count += 1;
59 if connected_peer_count < 1 {
60 panic!("Failed to connect to any peer.");
63 println!("Connected to {} Lightning peers!", connected_peer_count);
65 tokio::spawn(async move {
66 let mut previous_announcement_count = 0u64;
67 let mut previous_update_count = 0u64;
68 let mut is_caught_up_with_gossip = false;
71 let mut latest_new_gossip_time = Instant::now();
72 let mut needs_to_notify_persister = false;
75 i += 1; // count the background activity
76 let sleep = tokio::time::sleep(Duration::from_secs(5));
80 let counter = router.counter.read().unwrap();
81 let total_message_count = counter.channel_announcements + counter.channel_updates;
82 let new_message_count = total_message_count - previous_announcement_count - previous_update_count;
84 let was_previously_caught_up_with_gossip = is_caught_up_with_gossip;
85 // TODO: make new message threshold (20) adjust based on connected peer count
86 is_caught_up_with_gossip = new_message_count < 20 && previous_announcement_count > 0 && previous_update_count > 0;
87 if new_message_count > 0 {
88 latest_new_gossip_time = Instant::now();
91 // if we either aren't caught up, or just stopped/started being caught up
92 if !is_caught_up_with_gossip || (is_caught_up_with_gossip != was_previously_caught_up_with_gossip) {
94 "gossip count (iteration {}): {} (delta: {}):\n\tannouncements: {}\n\t\tmismatched scripts: {}\n\tupdates: {}\n\t\tno HTLC max: {}\n",
98 counter.channel_announcements,
99 counter.channel_announcements_with_mismatched_scripts,
100 counter.channel_updates,
101 counter.channel_updates_without_htlc_max_msats
104 println!("Monitoring for gossip…")
107 if is_caught_up_with_gossip && !was_previously_caught_up_with_gossip {
108 println!("caught up with gossip!");
109 needs_to_notify_persister = true;
110 } else if !is_caught_up_with_gossip && was_previously_caught_up_with_gossip {
111 println!("Received new messages since catching up with gossip!");
114 let continuous_caught_up_duration = latest_new_gossip_time.elapsed();
115 if continuous_caught_up_duration.as_secs() > 600 {
116 eprintln!("No new gossip messages in 10 minutes! Something's amiss!");
119 previous_announcement_count = counter.channel_announcements;
120 previous_update_count = counter.channel_updates;
123 if needs_to_notify_persister {
124 needs_to_notify_persister = false;
125 completion_sender.send(()).await.unwrap();
131 async fn connect_peer(current_peer: (PublicKey, SocketAddr), peer_manager: GossipPeerManager) -> bool {
132 eprintln!("Connecting to peer {}@{}...", current_peer.0.to_hex(), current_peer.1.to_string());
133 let connection = lightning_net_tokio::connect_outbound(
134 Arc::clone(&peer_manager),
138 if let Some(disconnection_future) = connection {
139 eprintln!("Connected to peer {}@{}!", current_peer.0.to_hex(), current_peer.1.to_string());
140 tokio::spawn(async move {
141 disconnection_future.await;
143 eprintln!("Reconnecting to peer {}@{}...", current_peer.0.to_hex(), current_peer.1.to_string());
144 if let Some(disconnection_future) = lightning_net_tokio::connect_outbound(
145 Arc::clone(&peer_manager),
149 disconnection_future.await;
151 tokio::time::sleep(Duration::from_secs(10)).await;
157 eprintln!("Failed to connect to peer {}@{}", current_peer.0.to_hex(), current_peer.1.to_string());