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