_ Git - rapid-gossip-sync-server/blob - src/tracking.rs

   1 use std::net::SocketAddr;
   2 use std::sync::Arc;
   3 use std::time::{Duration, Instant};
   4
   5 use bitcoin::hashes::hex::ToHex;
   6 use bitcoin::secp256k1::{PublicKey, SecretKey};
   7 use lightning;
   8 use lightning::ln::peer_handler::{
   9         ErroringMessageHandler, IgnoringMessageHandler, MessageHandler, PeerManager,
  10 };
  11 use lightning::routing::gossip::NetworkGraph;
  12 use rand::{Rng, thread_rng};
  13 use tokio::sync::mpsc;
  14
  15 use crate::{config, TestLogger};
  16 use crate::downloader::GossipRouter;
  17 use crate::types::{GossipMessage, GossipPeerManager};
  18
  19 pub(crate) async fn download_gossip(persistence_sender: mpsc::Sender<GossipMessage>, network_graph: Arc<NetworkGraph<TestLogger>>) {
  20         let mut key = [0; 32];
  21         let mut random_data = [0; 32];
  22         thread_rng().fill_bytes(&mut key);
  23         thread_rng().fill_bytes(&mut random_data);
  24         let our_node_secret = SecretKey::from_slice(&key).unwrap();
  25
  26         let router = Arc::new(GossipRouter::new(network_graph, persistence_sender.clone()));
  27
  28         let message_handler = MessageHandler {
  29                 chan_handler: ErroringMessageHandler::new(),
  30                 route_handler: Arc::clone(&router),
  31         };
  32         let peer_handler = Arc::new(PeerManager::new(
  33                 message_handler,
  34                 our_node_secret,
  35                 &random_data,
  36                 TestLogger::new(),
  37                 IgnoringMessageHandler {},
  38         ));
  39
  40         println!("Connecting to Lightning peers...");
  41         let peers = config::ln_peers();
  42         let mut connected_peer_count = 0;
  43
  44         for current_peer in peers {
  45                 let initial_connection_succeeded = connect_peer(current_peer, Arc::clone(&peer_handler)).await;
  46                 if initial_connection_succeeded {
  47                         connected_peer_count += 1;
  48                 }
  49         }
  50
  51         if connected_peer_count < 1 {
  52                 panic!("Failed to connect to any peer.");
  53         }
  54
  55         println!("Connected to {} Lightning peers!", connected_peer_count);
  56
  57         tokio::spawn(async move {
  58                 let mut previous_announcement_count = 0u64;
  59                 let mut previous_update_count = 0u64;
  60                 let mut is_caught_up_with_gossip = false;
  61
  62                 let mut i = 0u32;
  63                 let mut latest_new_gossip_time = Instant::now();
  64                 let mut needs_to_notify_persister = false;
  65
  66                 loop {
  67                         i += 1; // count the background activity
  68                         let sleep = tokio::time::sleep(Duration::from_secs(5));
  69                         sleep.await;
  70
  71                         {
  72                                 let counter = router.counter.read().unwrap();
  73                                 let total_message_count = counter.channel_announcements + counter.channel_updates;
  74                                 let new_message_count = total_message_count - previous_announcement_count - previous_update_count;
  75
  76                                 let was_previously_caught_up_with_gossip = is_caught_up_with_gossip;
  77                                 // TODO: make new message threshold (20) adjust based on connected peer count
  78                                 is_caught_up_with_gossip = new_message_count < 20 && previous_announcement_count > 0 && previous_update_count > 0;
  79                                 if new_message_count > 0 {
  80                                         latest_new_gossip_time = Instant::now();
  81                                 }
  82
  83                                 // if we either aren't caught up, or just stopped/started being caught up
  84                                 if !is_caught_up_with_gossip || (is_caught_up_with_gossip != was_previously_caught_up_with_gossip) {
  85                                         println!(
  86                                                 "gossip count (iteration {}): {} (delta: {}):\n\tannouncements: {}\n\t\tmismatched scripts: {}\n\tupdates: {}\n\t\tno HTLC max: {}\n",
  87                                                 i,
  88                                                 total_message_count,
  89                                                 new_message_count,
  90                                                 counter.channel_announcements,
  91                                                 counter.channel_announcements_with_mismatched_scripts,
  92                                                 counter.channel_updates,
  93                                                 counter.channel_updates_without_htlc_max_msats
  94                                         );
  95                                 } else {
  96                                         println!("Monitoring for gossip…")
  97                                 }
  98
  99                                 if is_caught_up_with_gossip && !was_previously_caught_up_with_gossip {
 100                                         println!("caught up with gossip!");
 101                                         needs_to_notify_persister = true;
 102                                 } else if !is_caught_up_with_gossip && was_previously_caught_up_with_gossip {
 103                                         println!("Received new messages since catching up with gossip!");
 104                                 }
 105
 106                                 let continuous_caught_up_duration = latest_new_gossip_time.elapsed();
 107                                 if continuous_caught_up_duration.as_secs() > 600 {
 108                                         eprintln!("No new gossip messages in 10 minutes! Something's amiss!");
 109                                 }
 110
 111                                 previous_announcement_count = counter.channel_announcements;
 112                                 previous_update_count = counter.channel_updates;
 113                         }
 114
 115                         if needs_to_notify_persister {
 116                                 needs_to_notify_persister = false;
 117                                 persistence_sender.send(GossipMessage::InitialSyncComplete).await.unwrap();
 118                         }
 119                 }
 120         });
 121 }
 122
 123 async fn connect_peer(current_peer: (PublicKey, SocketAddr), peer_manager: GossipPeerManager) -> bool {
 124         eprintln!("Connecting to peer {}@{}...", current_peer.0.to_hex(), current_peer.1.to_string());
 125         let connection = lightning_net_tokio::connect_outbound(
 126                 Arc::clone(&peer_manager),
 127                 current_peer.0,
 128                 current_peer.1,
 129         ).await;
 130         if let Some(disconnection_future) = connection {
 131                 eprintln!("Connected to peer {}@{}!", current_peer.0.to_hex(), current_peer.1.to_string());
 132                 tokio::spawn(async move {
 133                         disconnection_future.await;
 134                         loop {
 135                                 eprintln!("Reconnecting to peer {}@{}...", current_peer.0.to_hex(), current_peer.1.to_string());
 136                                 if let Some(disconnection_future) = lightning_net_tokio::connect_outbound(
 137                                         Arc::clone(&peer_manager),
 138                                         current_peer.0,
 139                                         current_peer.1,
 140                                 ).await {
 141                                         disconnection_future.await;
 142                                 } else {
 143                                         tokio::time::sleep(Duration::from_secs(10)).await;
 144                                 }
 145                         }
 146                 });
 147                 true
 148         } else {
 149                 eprintln!("Failed to connect to peer {}@{}", current_peer.0.to_hex(), current_peer.1.to_string());
 150                 false
 151         }
 152 }