1 use std::net::SocketAddr;
2 use std::sync::{Arc, RwLock};
3 use std::time::{Duration, Instant};
5 use bitcoin::hashes::hex::ToHex;
6 use bitcoin::secp256k1::{PublicKey, SecretKey};
8 use lightning::ln::peer_handler::{
9 ErroringMessageHandler, IgnoringMessageHandler, MessageHandler, PeerManager,
11 use lightning::routing::gossip::{NetworkGraph, P2PGossipSync};
12 use rand::{Rng, thread_rng};
13 use tokio::sync::mpsc;
15 use crate::{config, TestLogger};
16 use crate::downloader::{GossipCounter, GossipRouter};
17 use crate::types::{GossipChainAccess, GossipMessage, GossipPeerManager};
18 use crate::verifier::ChainVerifier;
20 pub(crate) async fn download_gossip(persistence_sender: mpsc::Sender<GossipMessage>, network_graph: Arc<NetworkGraph<Arc<TestLogger>>>) {
21 let mut key = [0; 32];
22 let mut random_data = [0; 32];
23 thread_rng().fill_bytes(&mut key);
24 thread_rng().fill_bytes(&mut random_data);
25 let our_node_secret = SecretKey::from_slice(&key).unwrap();
27 let _arc_chain_access = None::<GossipChainAccess>;
28 let arc_chain_access = Some(Arc::new(ChainVerifier::new()));
29 let ignorer = IgnoringMessageHandler {};
30 let arc_ignorer = Arc::new(ignorer);
32 let errorer = ErroringMessageHandler::new();
33 let arc_errorer = Arc::new(errorer);
35 let logger = TestLogger::new();
36 let arc_logger = Arc::new(logger);
38 let router = P2PGossipSync::new(
39 network_graph.clone(),
41 Arc::clone(&arc_logger),
43 let arc_router = Arc::new(router);
44 let wrapped_router = GossipRouter {
45 native_router: arc_router,
46 counter: RwLock::new(GossipCounter::new()),
47 sender: persistence_sender.clone(),
49 let arc_wrapped_router = Arc::new(wrapped_router);
51 let message_handler = MessageHandler {
52 chan_handler: arc_errorer,
53 route_handler: arc_wrapped_router.clone(),
55 let peer_handler = PeerManager::new(
59 Arc::clone(&arc_logger),
62 let arc_peer_handler = Arc::new(peer_handler);
64 println!("Connecting to Lightning peers…");
65 let peers = config::ln_peers();
66 let mut connected_peer_count = 0;
68 for current_peer in peers {
69 let initial_connection_succeeded = connect_peer(current_peer, Arc::clone(&arc_peer_handler)).await;
70 if initial_connection_succeeded {
71 connected_peer_count += 1;
75 if connected_peer_count < 1 {
76 panic!("Failed to connect to any peer.");
79 println!("Connected to {} Lightning peers!", connected_peer_count);
81 let local_router = arc_wrapped_router.clone();
82 let local_persistence_sender = persistence_sender.clone();
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));
97 let router_clone = Arc::clone(&local_router);
100 let counter = router_clone.counter.read().unwrap();
101 let total_message_count = counter.channel_announcements + counter.channel_updates;
102 let new_message_count = total_message_count - previous_announcement_count - previous_update_count;
104 let was_previously_caught_up_with_gossip = is_caught_up_with_gossip;
105 // TODO: make new message threshold (20) adjust based on connected peer count
106 is_caught_up_with_gossip = new_message_count < 20 && previous_announcement_count > 0 && previous_update_count > 0;
107 if new_message_count > 0 {
108 latest_new_gossip_time = Instant::now();
111 // if we either aren't caught up, or just stopped/started being caught up
112 if !is_caught_up_with_gossip || (is_caught_up_with_gossip != was_previously_caught_up_with_gossip) {
114 "gossip count (iteration {}): {} (delta: {}):\n\tannouncements: {}\n\t\tmismatched scripts: {}\n\tupdates: {}\n\t\tno HTLC max: {}\n",
118 counter.channel_announcements,
119 counter.channel_announcements_with_mismatched_scripts,
120 counter.channel_updates,
121 counter.channel_updates_without_htlc_max_msats
124 println!("Monitoring for gossip…")
127 if is_caught_up_with_gossip && !was_previously_caught_up_with_gossip {
128 println!("caught up with gossip!");
129 needs_to_notify_persister = true;
130 } else if !is_caught_up_with_gossip && was_previously_caught_up_with_gossip {
131 println!("Received new messages since catching up with gossip!");
134 let continuous_caught_up_duration = latest_new_gossip_time.elapsed();
135 if continuous_caught_up_duration.as_secs() > 600 {
136 eprintln!("No new gossip messages in 10 minutes! Something's amiss!");
139 previous_announcement_count = counter.channel_announcements;
140 previous_update_count = counter.channel_updates;
143 if needs_to_notify_persister {
144 needs_to_notify_persister = false;
145 local_persistence_sender.send(GossipMessage::InitialSyncComplete).await.unwrap();
151 async fn connect_peer(current_peer: (PublicKey, SocketAddr), peer_manager: GossipPeerManager) -> bool {
152 eprintln!("Connecting to peer {}@{}...", current_peer.0.to_hex(), current_peer.1.to_string());
153 let connection = lightning_net_tokio::connect_outbound(
154 Arc::clone(&peer_manager),
158 if let Some(disconnection_future) = connection {
159 eprintln!("Connected to peer {}@{}!", current_peer.0.to_hex(), current_peer.1.to_string());
160 tokio::spawn(async move {
161 disconnection_future.await;
163 eprintln!("Reconnecting to peer {}@{}...", current_peer.0.to_hex(), current_peer.1.to_string());
164 if let Some(disconnection_future) = lightning_net_tokio::connect_outbound(
165 Arc::clone(&peer_manager),
169 disconnection_future.await;
171 tokio::time::sleep(Duration::from_secs(10)).await;
177 eprintln!("Failed to connect to peer {}@{}", current_peer.0.to_hex(), current_peer.1.to_string());