_ 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::secp256k1::PublicKey;
   9 use hex_conservative::display::DisplayHex;
  10 use lightning::ln::peer_handler::{
  11         ErroringMessageHandler, IgnoringMessageHandler, MessageHandler, PeerManager,
  12 };
  13 use lightning::{log_info, log_warn};
  14 use lightning::routing::gossip::NetworkGraph;
  15 use lightning::sign::KeysManager;
  16 use lightning::util::logger::Logger;
  17 use tokio::sync::mpsc;
  18 use tokio::task::JoinSet;
  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 handles = JoinSet::new();
  70         let mut connected_peer_count = 0;
  71
  72         if peers.len() <= config::CONNECTED_PEER_ASSERTION_LIMIT {
  73                 log_warn!(logger, "Peer assertion threshold is {}, but only {} peers specified.", config::CONNECTED_PEER_ASSERTION_LIMIT, peers.len());
  74         }
  75
  76         for current_peer in peers {
  77                 let peer_handler_clone = peer_handler.clone();
  78                 let logger_clone = logger.clone();
  79                 handles.spawn(async move {
  80                         connect_peer(current_peer, peer_handler_clone, logger_clone).await
  81                 });
  82         }
  83
  84         while let Some(connection_result) = handles.join_next().await {
  85                 if let Ok(connection) = connection_result {
  86                         if connection {
  87                                 connected_peer_count += 1;
  88                                 if connected_peer_count >= config::CONNECTED_PEER_ASSERTION_LIMIT {
  89                                         break;
  90                                 }
  91                         }
  92                 }
  93         }
  94
  95         if connected_peer_count < 1 {
  96                 panic!("Failed to connect to any peer.");
  97         }
  98
  99         log_info!(logger, "Connected to {} Lightning peers!", connected_peer_count);
 100
 101         let mut previous_announcement_count = 0u64;
 102         let mut previous_update_count = 0u64;
 103         let mut is_caught_up_with_gossip = false;
 104
 105         let mut i = 0u32;
 106         let mut latest_new_gossip_time = Instant::now();
 107         let mut needs_to_notify_persister = false;
 108
 109         loop {
 110                 i += 1; // count the background activity
 111                 let sleep = tokio::time::sleep(Duration::from_secs(5));
 112                 sleep.await;
 113
 114                 {
 115                         let counter = router.counter.read().unwrap();
 116                         let total_message_count = counter.channel_announcements + counter.channel_updates;
 117                         let new_message_count = total_message_count - previous_announcement_count - previous_update_count;
 118
 119                         let was_previously_caught_up_with_gossip = is_caught_up_with_gossip;
 120                         // TODO: make new message threshold (20) adjust based on connected peer count
 121                         is_caught_up_with_gossip = new_message_count < 20 && previous_announcement_count > 0 && previous_update_count > 0;
 122                         if new_message_count > 0 {
 123                                 latest_new_gossip_time = Instant::now();
 124                         }
 125
 126                         // if we either aren't caught up, or just stopped/started being caught up
 127                         if !is_caught_up_with_gossip || (is_caught_up_with_gossip != was_previously_caught_up_with_gossip) {
 128                                 log_info!(
 129                                         logger,
 130                                         "gossip count (iteration {}): {} (delta: {}):\n\tannouncements: {}\n\t\tmismatched scripts: {}\n\tupdates: {}\n\t\tno HTLC max: {}\n",
 131                                         i,
 132                                         total_message_count,
 133                                         new_message_count,
 134                                         counter.channel_announcements,
 135                                         counter.channel_announcements_with_mismatched_scripts,
 136                                         counter.channel_updates,
 137                                         counter.channel_updates_without_htlc_max_msats
 138                                 );
 139                         } else {
 140                                 log_info!(logger, "Monitoring for gossip…")
 141                         }
 142
 143                         if is_caught_up_with_gossip && !was_previously_caught_up_with_gossip {
 144                                 log_info!(logger, "caught up with gossip!");
 145                                 needs_to_notify_persister = true;
 146                         } else if !is_caught_up_with_gossip && was_previously_caught_up_with_gossip {
 147                                 log_info!(logger, "Received new messages since catching up with gossip!");
 148                         }
 149
 150                         let continuous_caught_up_duration = latest_new_gossip_time.elapsed();
 151                         if continuous_caught_up_duration.as_secs() > 600 {
 152                                 log_warn!(logger, "No new gossip messages in 10 minutes! Something's amiss!");
 153                         }
 154
 155                         previous_announcement_count = counter.channel_announcements;
 156                         previous_update_count = counter.channel_updates;
 157                 }
 158
 159                 if needs_to_notify_persister {
 160                         needs_to_notify_persister = false;
 161                         completion_sender.send(()).await.unwrap();
 162                 }
 163         }
 164 }
 165
 166 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 {
 167         // we seek to find out if the first connection attempt was successful
 168         let (sender, mut receiver) = mpsc::channel::<bool>(1);
 169         tokio::spawn(async move {
 170                 let current_peer_pubkey_hex = current_peer.0.serialize().to_lower_hex_string();
 171                 log_info!(logger, "Connecting to peer {}@{}...", current_peer_pubkey_hex, current_peer.1);
 172                 let mut is_first_iteration = true;
 173                 loop {
 174                         if let Some(disconnection_future) = lightning_net_tokio::connect_outbound(
 175                                 Arc::clone(&peer_manager),
 176                                 current_peer.0,
 177                                 current_peer.1,
 178                         ).await {
 179                                 log_info!(logger, "Connected to peer {}@{}!", current_peer_pubkey_hex, current_peer.1);
 180                                 if is_first_iteration {
 181                                         sender.send(true).await.unwrap();
 182                                 }
 183                                 disconnection_future.await;
 184                                 log_warn!(logger, "Disconnected from peer {}@{}", current_peer_pubkey_hex, current_peer.1);
 185                         } else {
 186                                 log_warn!(logger, "Failed to connect to peer {}@{}!", current_peer_pubkey_hex, current_peer.1);
 187                                 if is_first_iteration {
 188                                         sender.send(false).await.unwrap();
 189                                 }
 190                         }
 191                         is_first_iteration = false;
 192                         tokio::time::sleep(Duration::from_secs(10)).await;
 193                         log_warn!(logger, "Reconnecting to peer {}@{}...", current_peer_pubkey_hex, current_peer.1);
 194                 }
 195         });
 196
 197         let success = receiver.recv().await.unwrap();
 198         success
 199 }