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

   1 use std::fs::OpenOptions;
   2 use std::io::{BufWriter, Write};
   3 use std::sync::Arc;
   4 use std::time::{Duration, Instant};
   5 use lightning::routing::gossip::NetworkGraph;
   6 use lightning::util::ser::Writeable;
   7 use tokio::sync::mpsc;
   8 use tokio_postgres::NoTls;
   9
  10 use crate::{config, TestLogger};
  11 use crate::types::GossipMessage;
  12
  13 const POSTGRES_INSERT_TIMEOUT: Duration = Duration::from_secs(15);
  14
  15 pub(crate) struct GossipPersister {
  16         gossip_persistence_receiver: mpsc::Receiver<GossipMessage>,
  17         network_graph: Arc<NetworkGraph<TestLogger>>,
  18 }
  19
  20 impl GossipPersister {
  21         pub fn new(network_graph: Arc<NetworkGraph<TestLogger>>) -> (Self, mpsc::Sender<GossipMessage>) {
  22                 let (gossip_persistence_sender, gossip_persistence_receiver) =
  23                         mpsc::channel::<GossipMessage>(100);
  24                 (GossipPersister {
  25                         gossip_persistence_receiver,
  26                         network_graph
  27                 }, gossip_persistence_sender)
  28         }
  29
  30         pub(crate) async fn persist_gossip(&mut self) {
  31                 let connection_config = config::db_connection_config();
  32                 let (mut client, connection) =
  33                         connection_config.connect(NoTls).await.unwrap();
  34
  35                 tokio::spawn(async move {
  36                         if let Err(e) = connection.await {
  37                                 panic!("connection error: {}", e);
  38                         }
  39                 });
  40
  41                 {
  42                         // initialize the database
  43                         let initialization = client
  44                                 .execute(config::db_config_table_creation_query(), &[])
  45                                 .await;
  46                         if let Err(initialization_error) = initialization {
  47                                 panic!("db init error: {}", initialization_error);
  48                         }
  49
  50                         let cur_schema = client.query("SELECT db_schema FROM config WHERE id = $1", &[&1]).await.unwrap();
  51                         if !cur_schema.is_empty() {
  52                                 config::upgrade_db(cur_schema[0].get(0), &mut client).await;
  53                         }
  54
  55                         let initialization = client
  56                                 .execute(
  57                                         // TODO: figure out a way to fix the id value without Postgres complaining about
  58                                         // its value not being default
  59                                         "INSERT INTO config (id, db_schema) VALUES ($1, $2) ON CONFLICT (id) DO NOTHING",
  60                                         &[&1, &config::SCHEMA_VERSION]
  61                                 ).await;
  62                         if let Err(initialization_error) = initialization {
  63                                 panic!("db init error: {}", initialization_error);
  64                         }
  65
  66                         let initialization = client
  67                                 .execute(config::db_announcement_table_creation_query(), &[])
  68                                 .await;
  69                         if let Err(initialization_error) = initialization {
  70                                 panic!("db init error: {}", initialization_error);
  71                         }
  72
  73                         let initialization = client
  74                                 .execute(
  75                                         config::db_channel_update_table_creation_query(),
  76                                         &[],
  77                                 )
  78                                 .await;
  79                         if let Err(initialization_error) = initialization {
  80                                 panic!("db init error: {}", initialization_error);
  81                         }
  82
  83                         let initialization = client
  84                                 .batch_execute(config::db_index_creation_query())
  85                                 .await;
  86                         if let Err(initialization_error) = initialization {
  87                                 panic!("db init error: {}", initialization_error);
  88                         }
  89                 }
  90
  91                 // print log statement every minute
  92                 let mut latest_persistence_log = Instant::now() - Duration::from_secs(60);
  93                 let mut i = 0u32;
  94                 let mut latest_graph_cache_time = Instant::now();
  95                 // TODO: it would be nice to have some sort of timeout here so after 10 seconds of
  96                 // inactivity, some sort of message could be broadcast signaling the activation of request
  97                 // processing
  98                 while let Some(gossip_message) = &self.gossip_persistence_receiver.recv().await {
  99                         i += 1; // count the persisted gossip messages
 100
 101                         if latest_persistence_log.elapsed().as_secs() >= 60 {
 102                                 println!("Persisting gossip message #{}", i);
 103                                 latest_persistence_log = Instant::now();
 104                         }
 105
 106                         // has it been ten minutes? Just cache it
 107                         if latest_graph_cache_time.elapsed().as_secs() >= 600 {
 108                                 self.persist_network_graph();
 109                                 latest_graph_cache_time = Instant::now();
 110                         }
 111
 112                         match &gossip_message {
 113                                 GossipMessage::ChannelAnnouncement(announcement) => {
 114                                         let scid = announcement.contents.short_channel_id as i64;
 115
 116                                         // start with the type prefix, which is already known a priori
 117                                         let mut announcement_signed = Vec::new();
 118                                         announcement.write(&mut announcement_signed).unwrap();
 119
 120                                         tokio::time::timeout(POSTGRES_INSERT_TIMEOUT, client
 121                                                 .execute("INSERT INTO channel_announcements (\
 122                                                         short_channel_id, \
 123                                                         announcement_signed \
 124                                                 ) VALUES ($1, $2) ON CONFLICT (short_channel_id) DO NOTHING", &[
 125                                                         &scid,
 126                                                         &announcement_signed
 127                                                 ])).await.unwrap().unwrap();
 128                                 }
 129                                 GossipMessage::ChannelUpdate(update) => {
 130                                         let scid = update.contents.short_channel_id as i64;
 131
 132                                         let timestamp = update.contents.timestamp as i64;
 133
 134                                         let direction = (update.contents.flags & 1) == 1;
 135                                         let disable = (update.contents.flags & 2) > 0;
 136
 137                                         let cltv_expiry_delta = update.contents.cltv_expiry_delta as i32;
 138                                         let htlc_minimum_msat = update.contents.htlc_minimum_msat as i64;
 139                                         let fee_base_msat = update.contents.fee_base_msat as i32;
 140                                         let fee_proportional_millionths =
 141                                                 update.contents.fee_proportional_millionths as i32;
 142                                         let htlc_maximum_msat = update.contents.htlc_maximum_msat as i64;
 143
 144                                         // start with the type prefix, which is already known a priori
 145                                         let mut update_signed = Vec::new();
 146                                         update.write(&mut update_signed).unwrap();
 147
 148                                         tokio::time::timeout(POSTGRES_INSERT_TIMEOUT, client
 149                                                 .execute("INSERT INTO channel_updates (\
 150                                                         short_channel_id, \
 151                                                         timestamp, \
 152                                                         channel_flags, \
 153                                                         direction, \
 154                                                         disable, \
 155                                                         cltv_expiry_delta, \
 156                                                         htlc_minimum_msat, \
 157                                                         fee_base_msat, \
 158                                                         fee_proportional_millionths, \
 159                                                         htlc_maximum_msat, \
 160                                                         blob_signed \
 161                                                 ) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11)  ON CONFLICT DO NOTHING", &[
 162                                                         &scid,
 163                                                         &timestamp,
 164                                                         &(update.contents.flags as i16),
 165                                                         &direction,
 166                                                         &disable,
 167                                                         &cltv_expiry_delta,
 168                                                         &htlc_minimum_msat,
 169                                                         &fee_base_msat,
 170                                                         &fee_proportional_millionths,
 171                                                         &htlc_maximum_msat,
 172                                                         &update_signed
 173                                                 ])).await.unwrap().unwrap();
 174                                 }
 175                         }
 176                 }
 177         }
 178
 179         fn persist_network_graph(&self) {
 180                 println!("Caching network graph…");
 181                 let cache_path = config::network_graph_cache_path();
 182                 let file = OpenOptions::new()
 183                         .create(true)
 184                         .write(true)
 185                         .truncate(true)
 186                         .open(&cache_path)
 187                         .unwrap();
 188                 self.network_graph.remove_stale_channels_and_tracking();
 189                 let mut writer = BufWriter::new(file);
 190                 self.network_graph.write(&mut writer).unwrap();
 191                 writer.flush().unwrap();
 192                 println!("Cached network graph!");
 193         }
 194 }