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

   1 use std::collections::hash_map::RandomState;
   2 use std::hash::{BuildHasher, Hasher};
   3 use std::net::SocketAddr;
   4 use std::sync::Arc;
   5 use std::time::{Duration, Instant};
   6
   7 use bitcoin::hashes::hex::ToHex;
   8 use bitcoin::secp256k1::{PublicKey, SecretKey};
   9 use lightning;
  10 use lightning::ln::peer_handler::{
  11         ErroringMessageHandler, IgnoringMessageHandler, MessageHandler, PeerManager,
  12 };
  13 use lightning::routing::gossip::NetworkGraph;
  14 use tokio::sync::mpsc;
  15
  16 use crate::{config, TestLogger};
  17 use crate::downloader::GossipRouter;
  18 use crate::types::{GossipMessage, GossipPeerManager};
  19
  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());
  32
  33         let our_node_secret = SecretKey::from_slice(&key).unwrap();
  34         let router = Arc::new(GossipRouter::new(network_graph, persistence_sender.clone()));
  35
  36         let message_handler = MessageHandler {
  37                 chan_handler: ErroringMessageHandler::new(),
  38                 route_handler: Arc::clone(&router),
  39         };
  40         let peer_handler = Arc::new(PeerManager::new(
  41                 message_handler,
  42                 our_node_secret,
  43                 &random_data,
  44                 TestLogger::new(),
  45                 IgnoringMessageHandler {},
  46         ));
  47
  48         println!("Connecting to Lightning peers...");
  49         let peers = config::ln_peers();
  50         let mut connected_peer_count = 0;
  51
  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;
  56                 }
  57         }
  58
  59         if connected_peer_count < 1 {
  60                 panic!("Failed to connect to any peer.");
  61         }
  62
  63         println!("Connected to {} Lightning peers!", connected_peer_count);
  64
  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;
  69
  70                 let mut i = 0u32;
  71                 let mut latest_new_gossip_time = Instant::now();
  72                 let mut needs_to_notify_persister = false;
  73
  74                 loop {
  75                         i += 1; // count the background activity
  76                         let sleep = tokio::time::sleep(Duration::from_secs(5));
  77                         sleep.await;
  78
  79                         {
  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;
  83
  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();
  89                                 }
  90
  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) {
  93                                         println!(
  94                                                 "gossip count (iteration {}): {} (delta: {}):\n\tannouncements: {}\n\t\tmismatched scripts: {}\n\tupdates: {}\n\t\tno HTLC max: {}\n",
  95                                                 i,
  96                                                 total_message_count,
  97                                                 new_message_count,
  98                                                 counter.channel_announcements,
  99                                                 counter.channel_announcements_with_mismatched_scripts,
 100                                                 counter.channel_updates,
 101                                                 counter.channel_updates_without_htlc_max_msats
 102                                         );
 103                                 } else {
 104                                         println!("Monitoring for gossip…")
 105                                 }
 106
 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!");
 112                                 }
 113
 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!");
 117                                 }
 118
 119                                 previous_announcement_count = counter.channel_announcements;
 120                                 previous_update_count = counter.channel_updates;
 121                         }
 122
 123                         if needs_to_notify_persister {
 124                                 needs_to_notify_persister = false;
 125                                 completion_sender.send(()).await.unwrap();
 126                         }
 127                 }
 128         });
 129 }
 130
 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),
 135                 current_peer.0,
 136                 current_peer.1,
 137         ).await;
 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;
 142                         loop {
 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),
 146                                         current_peer.0,
 147                                         current_peer.1,
 148                                 ).await {
 149                                         disconnection_future.await;
 150                                 } else {
 151                                         tokio::time::sleep(Duration::from_secs(10)).await;
 152                                 }
 153                         }
 154                 });
 155                 true
 156         } else {
 157                 eprintln!("Failed to connect to peer {}@{}", current_peer.0.to_hex(), current_peer.1.to_string());
 158                 false
 159         }
 160 }