_ 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::ops::Deref;
   5 use std::sync::Arc;
   6 use std::time::{Duration, Instant};
   7
   8 use bitcoin::hashes::hex::ToHex;
   9 use bitcoin::secp256k1::PublicKey;
  10 use lightning;
  11 use lightning::ln::peer_handler::{
  12         ErroringMessageHandler, IgnoringMessageHandler, MessageHandler, PeerManager,
  13 };
  14 use lightning::{log_error, log_info, log_warn};
  15 use lightning::routing::gossip::NetworkGraph;
  16 use lightning::sign::KeysManager;
  17 use lightning::util::logger::Logger;
  18 use tokio::sync::mpsc;
  19
  20 use crate::config;
  21 use crate::downloader::GossipRouter;
  22 use crate::types::{GossipMessage, GossipPeerManager};
  23
  24 pub(crate) async fn download_gossip<L: Deref + Clone + Send + Sync + 'static>(persistence_sender: mpsc::Sender<GossipMessage>,
  25                 completion_sender: mpsc::Sender<()>,
  26                 network_graph: Arc<NetworkGraph<L>>,
  27                 logger: L
  28 ) where L::Target: Logger {
  29         let mut key = [42; 32];
  30         let mut random_data = [43; 32];
  31         // Get something psuedo-random from std.
  32         let mut key_hasher = RandomState::new().build_hasher();
  33         key_hasher.write_u8(1);
  34         key[0..8].copy_from_slice(&key_hasher.finish().to_ne_bytes());
  35         let mut rand_hasher = RandomState::new().build_hasher();
  36         rand_hasher.write_u8(2);
  37         random_data[0..8].copy_from_slice(&rand_hasher.finish().to_ne_bytes());
  38
  39         let keys_manager = Arc::new(KeysManager::new(&key, 0xdeadbeef, 0xdeadbeef));
  40
  41         let router = Arc::new(GossipRouter::new(network_graph, persistence_sender.clone(), logger.clone()));
  42
  43         let message_handler = MessageHandler {
  44                 chan_handler: ErroringMessageHandler::new(),
  45                 route_handler: Arc::clone(&router),
  46                 onion_message_handler: IgnoringMessageHandler {},
  47                 custom_message_handler: IgnoringMessageHandler {},
  48         };
  49         let peer_handler = Arc::new(PeerManager::new(
  50                 message_handler,
  51                 0xdeadbeef,
  52                 &random_data,
  53                 logger.clone(),
  54                 keys_manager,
  55         ));
  56         router.set_pm(Arc::clone(&peer_handler));
  57
  58         let ph_timer = Arc::clone(&peer_handler);
  59         tokio::spawn(async move {
  60                 let mut intvl = tokio::time::interval(Duration::from_secs(10));
  61                 loop {
  62                         intvl.tick().await;
  63                         ph_timer.timer_tick_occurred();
  64                 }
  65         });
  66
  67         log_info!(logger, "Connecting to Lightning peers...");
  68         let peers = config::ln_peers();
  69         let mut connected_peer_count = 0;
  70
  71         for current_peer in peers {
  72                 let initial_connection_succeeded = connect_peer(current_peer, peer_handler.clone(), logger.clone()).await;
  73                 if initial_connection_succeeded {
  74                         connected_peer_count += 1;
  75                 }
  76         }
  77
  78         if connected_peer_count < 1 {
  79                 panic!("Failed to connect to any peer.");
  80         }
  81
  82         log_info!(logger, "Connected to {} Lightning peers!", connected_peer_count);
  83
  84         tokio::spawn(async move {
  85                 let mut previous_announcement_count = 0u64;
  86                 let mut previous_update_count = 0u64;
  87                 let mut is_caught_up_with_gossip = false;
  88
  89                 let mut i = 0u32;
  90                 let mut latest_new_gossip_time = Instant::now();
  91                 let mut needs_to_notify_persister = false;
  92
  93                 loop {
  94                         i += 1; // count the background activity
  95                         let sleep = tokio::time::sleep(Duration::from_secs(5));
  96                         sleep.await;
  97
  98                         {
  99                                 let counter = router.counter.read().unwrap();
 100                                 let total_message_count = counter.channel_announcements + counter.channel_updates;
 101                                 let new_message_count = total_message_count - previous_announcement_count - previous_update_count;
 102
 103                                 let was_previously_caught_up_with_gossip = is_caught_up_with_gossip;
 104                                 // TODO: make new message threshold (20) adjust based on connected peer count
 105                                 is_caught_up_with_gossip = new_message_count < 20 && previous_announcement_count > 0 && previous_update_count > 0;
 106                                 if new_message_count > 0 {
 107                                         latest_new_gossip_time = Instant::now();
 108                                 }
 109
 110                                 // if we either aren't caught up, or just stopped/started being caught up
 111                                 if !is_caught_up_with_gossip || (is_caught_up_with_gossip != was_previously_caught_up_with_gossip) {
 112                                         log_info!(
 113                                                 logger,
 114                                                 "gossip count (iteration {}): {} (delta: {}):\n\tannouncements: {}\n\t\tmismatched scripts: {}\n\tupdates: {}\n\t\tno HTLC max: {}\n",
 115                                                 i,
 116                                                 total_message_count,
 117                                                 new_message_count,
 118                                                 counter.channel_announcements,
 119                                                 counter.channel_announcements_with_mismatched_scripts,
 120                                                 counter.channel_updates,
 121                                                 counter.channel_updates_without_htlc_max_msats
 122                                         );
 123                                 } else {
 124                                         log_info!(logger, "Monitoring for gossip…")
 125                                 }
 126
 127                                 if is_caught_up_with_gossip && !was_previously_caught_up_with_gossip {
 128                                         log_info!(logger, "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                                         log_info!(logger, "Received new messages since catching up with gossip!");
 132                                 }
 133
 134                                 let continuous_caught_up_duration = latest_new_gossip_time.elapsed();
 135                                 if continuous_caught_up_duration.as_secs() > 600 {
 136                                         log_warn!(logger, "No new gossip messages in 10 minutes! Something's amiss!");
 137                                 }
 138
 139                                 previous_announcement_count = counter.channel_announcements;
 140                                 previous_update_count = counter.channel_updates;
 141                         }
 142
 143                         if needs_to_notify_persister {
 144                                 needs_to_notify_persister = false;
 145                                 completion_sender.send(()).await.unwrap();
 146                         }
 147                 }
 148         });
 149 }
 150
 151 async fn connect_peer<L: Deref + Clone + Send + Sync + 'static>(current_peer: (PublicKey, SocketAddr), peer_manager: GossipPeerManager<L>, logger: L) -> bool where L::Target: Logger {
 152         log_info!(logger, "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),
 155                 current_peer.0,
 156                 current_peer.1,
 157         ).await;
 158         if let Some(disconnection_future) = connection {
 159                 log_info!(logger, "Connected to peer {}@{}!", current_peer.0.to_hex(), current_peer.1.to_string());
 160                 tokio::spawn(async move {
 161                         disconnection_future.await;
 162                         loop {
 163                                 log_warn!(logger, "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),
 166                                         current_peer.0,
 167                                         current_peer.1,
 168                                 ).await {
 169                                         disconnection_future.await;
 170                                 }
 171                                 tokio::time::sleep(Duration::from_secs(10)).await;
 172                         }
 173                 });
 174                 true
 175         } else {
 176                 log_error!(logger, "Failed to connect to peer {}@{}", current_peer.0.to_hex(), current_peer.1.to_string());
 177                 false
 178         }
 179 }