_ 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;
   9 use lightning;
  10 use lightning::ln::peer_handler::{
  11         ErroringMessageHandler, IgnoringMessageHandler, MessageHandler, PeerManager,
  12 };
  13 use lightning::routing::gossip::NetworkGraph;
  14 use lightning::sign::KeysManager;
  15 use lightning::util::logger::Logger;
  16 use tokio::sync::mpsc;
  17
  18 use crate::config;
  19 use crate::downloader::GossipRouter;
  20 use crate::types::{GossipMessage, GossipPeerManager};
  21
  22 pub(crate) async fn download_gossip<L: Logger + Send + Sync + 'static>(persistence_sender: mpsc::Sender<GossipMessage>,
  23                 completion_sender: mpsc::Sender<()>,
  24                 network_graph: Arc<NetworkGraph<Arc<L>>>,
  25                 logger: Arc<L>
  26 ) {
  27         let mut key = [42; 32];
  28         let mut random_data = [43; 32];
  29         // Get something psuedo-random from std.
  30         let mut key_hasher = RandomState::new().build_hasher();
  31         key_hasher.write_u8(1);
  32         key[0..8].copy_from_slice(&key_hasher.finish().to_ne_bytes());
  33         let mut rand_hasher = RandomState::new().build_hasher();
  34         rand_hasher.write_u8(2);
  35         random_data[0..8].copy_from_slice(&rand_hasher.finish().to_ne_bytes());
  36
  37         let keys_manager = Arc::new(KeysManager::new(&key, 0xdeadbeef, 0xdeadbeef));
  38
  39         let router = Arc::new(GossipRouter::new(network_graph, persistence_sender.clone(), logger.clone()));
  40
  41         let message_handler = MessageHandler {
  42                 chan_handler: ErroringMessageHandler::new(),
  43                 route_handler: Arc::clone(&router),
  44                 onion_message_handler: IgnoringMessageHandler {},
  45                 custom_message_handler: IgnoringMessageHandler {},
  46         };
  47         let peer_handler = Arc::new(PeerManager::new(
  48                 message_handler,
  49                 0xdeadbeef,
  50                 &random_data,
  51                 logger,
  52                 keys_manager,
  53         ));
  54         router.set_pm(Arc::clone(&peer_handler));
  55
  56         let ph_timer = Arc::clone(&peer_handler);
  57         tokio::spawn(async move {
  58                 let mut intvl = tokio::time::interval(Duration::from_secs(10));
  59                 loop {
  60                         intvl.tick().await;
  61                         ph_timer.timer_tick_occurred();
  62                 }
  63         });
  64
  65         println!("Connecting to Lightning peers...");
  66         let peers = config::ln_peers();
  67         let mut connected_peer_count = 0;
  68
  69         for current_peer in peers {
  70                 let initial_connection_succeeded = connect_peer(current_peer, Arc::clone(&peer_handler)).await;
  71                 if initial_connection_succeeded {
  72                         connected_peer_count += 1;
  73                 }
  74         }
  75
  76         if connected_peer_count < 1 {
  77                 panic!("Failed to connect to any peer.");
  78         }
  79
  80         println!("Connected to {} Lightning peers!", connected_peer_count);
  81
  82         tokio::spawn(async move {
  83                 let mut previous_announcement_count = 0u64;
  84                 let mut previous_update_count = 0u64;
  85                 let mut is_caught_up_with_gossip = false;
  86
  87                 let mut i = 0u32;
  88                 let mut latest_new_gossip_time = Instant::now();
  89                 let mut needs_to_notify_persister = false;
  90
  91                 loop {
  92                         i += 1; // count the background activity
  93                         let sleep = tokio::time::sleep(Duration::from_secs(5));
  94                         sleep.await;
  95
  96                         {
  97                                 let counter = router.counter.read().unwrap();
  98                                 let total_message_count = counter.channel_announcements + counter.channel_updates;
  99                                 let new_message_count = total_message_count - previous_announcement_count - previous_update_count;
 100
 101                                 let was_previously_caught_up_with_gossip = is_caught_up_with_gossip;
 102                                 // TODO: make new message threshold (20) adjust based on connected peer count
 103                                 is_caught_up_with_gossip = new_message_count < 20 && previous_announcement_count > 0 && previous_update_count > 0;
 104                                 if new_message_count > 0 {
 105                                         latest_new_gossip_time = Instant::now();
 106                                 }
 107
 108                                 // if we either aren't caught up, or just stopped/started being caught up
 109                                 if !is_caught_up_with_gossip || (is_caught_up_with_gossip != was_previously_caught_up_with_gossip) {
 110                                         println!(
 111                                                 "gossip count (iteration {}): {} (delta: {}):\n\tannouncements: {}\n\t\tmismatched scripts: {}\n\tupdates: {}\n\t\tno HTLC max: {}\n",
 112                                                 i,
 113                                                 total_message_count,
 114                                                 new_message_count,
 115                                                 counter.channel_announcements,
 116                                                 counter.channel_announcements_with_mismatched_scripts,
 117                                                 counter.channel_updates,
 118                                                 counter.channel_updates_without_htlc_max_msats
 119                                         );
 120                                 } else {
 121                                         println!("Monitoring for gossip…")
 122                                 }
 123
 124                                 if is_caught_up_with_gossip && !was_previously_caught_up_with_gossip {
 125                                         println!("caught up with gossip!");
 126                                         needs_to_notify_persister = true;
 127                                 } else if !is_caught_up_with_gossip && was_previously_caught_up_with_gossip {
 128                                         println!("Received new messages since catching up with gossip!");
 129                                 }
 130
 131                                 let continuous_caught_up_duration = latest_new_gossip_time.elapsed();
 132                                 if continuous_caught_up_duration.as_secs() > 600 {
 133                                         eprintln!("No new gossip messages in 10 minutes! Something's amiss!");
 134                                 }
 135
 136                                 previous_announcement_count = counter.channel_announcements;
 137                                 previous_update_count = counter.channel_updates;
 138                         }
 139
 140                         if needs_to_notify_persister {
 141                                 needs_to_notify_persister = false;
 142                                 completion_sender.send(()).await.unwrap();
 143                         }
 144                 }
 145         });
 146 }
 147
 148 async fn connect_peer<L: Logger + Send + Sync + 'static>(current_peer: (PublicKey, SocketAddr), peer_manager: GossipPeerManager<L>) -> bool {
 149         eprintln!("Connecting to peer {}@{}...", current_peer.0.to_hex(), current_peer.1.to_string());
 150         let connection = lightning_net_tokio::connect_outbound(
 151                 Arc::clone(&peer_manager),
 152                 current_peer.0,
 153                 current_peer.1,
 154         ).await;
 155         if let Some(disconnection_future) = connection {
 156                 eprintln!("Connected to peer {}@{}!", current_peer.0.to_hex(), current_peer.1.to_string());
 157                 tokio::spawn(async move {
 158                         disconnection_future.await;
 159                         loop {
 160                                 eprintln!("Reconnecting to peer {}@{}...", current_peer.0.to_hex(), current_peer.1.to_string());
 161                                 if let Some(disconnection_future) = lightning_net_tokio::connect_outbound(
 162                                         Arc::clone(&peer_manager),
 163                                         current_peer.0,
 164                                         current_peer.1,
 165                                 ).await {
 166                                         disconnection_future.await;
 167                                 }
 168                                 tokio::time::sleep(Duration::from_secs(10)).await;
 169                         }
 170                 });
 171                 true
 172         } else {
 173                 eprintln!("Failed to connect to peer {}@{}", current_peer.0.to_hex(), current_peer.1.to_string());
 174                 false
 175         }
 176 }