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

   1 use std::fs::OpenOptions;
   2 use std::io::{BufWriter, Write};
   3 use std::ops::Deref;
   4 use std::sync::Arc;
   5 use std::time::{Duration, Instant};
   6 use lightning::routing::gossip::NetworkGraph;
   7 use lightning::util::logger::Logger;
   8 use lightning::util::ser::Writeable;
   9 use tokio::sync::mpsc;
  10 use tokio_postgres::NoTls;
  11
  12 use crate::config;
  13 use crate::types::GossipMessage;
  14
  15 const POSTGRES_INSERT_TIMEOUT: Duration = Duration::from_secs(15);
  16
  17 pub(crate) struct GossipPersister<L: Deref> where L::Target: Logger {
  18         gossip_persistence_receiver: mpsc::Receiver<GossipMessage>,
  19         network_graph: Arc<NetworkGraph<L>>,
  20 }
  21
  22 impl<L: Deref> GossipPersister<L> where L::Target: Logger {
  23         pub fn new(network_graph: Arc<NetworkGraph<L>>) -> (Self, mpsc::Sender<GossipMessage>) {
  24                 let (gossip_persistence_sender, gossip_persistence_receiver) =
  25                         mpsc::channel::<GossipMessage>(100);
  26                 (GossipPersister {
  27                         gossip_persistence_receiver,
  28                         network_graph
  29                 }, gossip_persistence_sender)
  30         }
  31
  32         pub(crate) async fn persist_gossip(&mut self) {
  33                 let connection_config = config::db_connection_config();
  34                 let (mut client, connection) =
  35                         connection_config.connect(NoTls).await.unwrap();
  36
  37                 tokio::spawn(async move {
  38                         if let Err(e) = connection.await {
  39                                 panic!("connection error: {}", e);
  40                         }
  41                 });
  42
  43                 {
  44                         // initialize the database
  45                         let initialization = client
  46                                 .execute(config::db_config_table_creation_query(), &[])
  47                                 .await;
  48                         if let Err(initialization_error) = initialization {
  49                                 panic!("db init error: {}", initialization_error);
  50                         }
  51
  52                         let cur_schema = client.query("SELECT db_schema FROM config WHERE id = $1", &[&1]).await.unwrap();
  53                         if !cur_schema.is_empty() {
  54                                 config::upgrade_db(cur_schema[0].get(0), &mut client).await;
  55                         }
  56
  57                         let initialization = client
  58                                 .execute(
  59                                         // TODO: figure out a way to fix the id value without Postgres complaining about
  60                                         // its value not being default
  61                                         "INSERT INTO config (id, db_schema) VALUES ($1, $2) ON CONFLICT (id) DO NOTHING",
  62                                         &[&1, &config::SCHEMA_VERSION]
  63                                 ).await;
  64                         if let Err(initialization_error) = initialization {
  65                                 panic!("db init error: {}", initialization_error);
  66                         }
  67
  68                         let initialization = client
  69                                 .execute(config::db_announcement_table_creation_query(), &[])
  70                                 .await;
  71                         if let Err(initialization_error) = initialization {
  72                                 panic!("db init error: {}", initialization_error);
  73                         }
  74
  75                         let initialization = client
  76                                 .execute(
  77                                         config::db_channel_update_table_creation_query(),
  78                                         &[],
  79                                 )
  80                                 .await;
  81                         if let Err(initialization_error) = initialization {
  82                                 panic!("db init error: {}", initialization_error);
  83                         }
  84
  85                         let initialization = client
  86                                 .batch_execute(config::db_index_creation_query())
  87                                 .await;
  88                         if let Err(initialization_error) = initialization {
  89                                 panic!("db init error: {}", initialization_error);
  90                         }
  91                 }
  92
  93                 // print log statement every minute
  94                 let mut latest_persistence_log = Instant::now() - Duration::from_secs(60);
  95                 let mut i = 0u32;
  96                 let mut latest_graph_cache_time = Instant::now();
  97                 // TODO: it would be nice to have some sort of timeout here so after 10 seconds of
  98                 // inactivity, some sort of message could be broadcast signaling the activation of request
  99                 // processing
 100                 while let Some(gossip_message) = &self.gossip_persistence_receiver.recv().await {
 101                         i += 1; // count the persisted gossip messages
 102
 103                         if latest_persistence_log.elapsed().as_secs() >= 60 {
 104                                 println!("Persisting gossip message #{}", i);
 105                                 latest_persistence_log = Instant::now();
 106                         }
 107
 108                         // has it been ten minutes? Just cache it
 109                         if latest_graph_cache_time.elapsed().as_secs() >= 600 {
 110                                 self.persist_network_graph();
 111                                 latest_graph_cache_time = Instant::now();
 112                         }
 113
 114                         match &gossip_message {
 115                                 GossipMessage::ChannelAnnouncement(announcement) => {
 116                                         let scid = announcement.contents.short_channel_id as i64;
 117
 118                                         // start with the type prefix, which is already known a priori
 119                                         let mut announcement_signed = Vec::new();
 120                                         announcement.write(&mut announcement_signed).unwrap();
 121
 122                                         tokio::time::timeout(POSTGRES_INSERT_TIMEOUT, client
 123                                                 .execute("INSERT INTO channel_announcements (\
 124                                                         short_channel_id, \
 125                                                         announcement_signed \
 126                                                 ) VALUES ($1, $2) ON CONFLICT (short_channel_id) DO NOTHING", &[
 127                                                         &scid,
 128                                                         &announcement_signed
 129                                                 ])).await.unwrap().unwrap();
 130                                 }
 131                                 GossipMessage::ChannelUpdate(update) => {
 132                                         let scid = update.contents.short_channel_id as i64;
 133
 134                                         let timestamp = update.contents.timestamp as i64;
 135
 136                                         let direction = (update.contents.flags & 1) == 1;
 137                                         let disable = (update.contents.flags & 2) > 0;
 138
 139                                         let cltv_expiry_delta = update.contents.cltv_expiry_delta as i32;
 140                                         let htlc_minimum_msat = update.contents.htlc_minimum_msat as i64;
 141                                         let fee_base_msat = update.contents.fee_base_msat as i32;
 142                                         let fee_proportional_millionths =
 143                                                 update.contents.fee_proportional_millionths as i32;
 144                                         let htlc_maximum_msat = update.contents.htlc_maximum_msat as i64;
 145
 146                                         // start with the type prefix, which is already known a priori
 147                                         let mut update_signed = Vec::new();
 148                                         update.write(&mut update_signed).unwrap();
 149
 150                                         tokio::time::timeout(POSTGRES_INSERT_TIMEOUT, client
 151                                                 .execute("INSERT INTO channel_updates (\
 152                                                         short_channel_id, \
 153                                                         timestamp, \
 154                                                         channel_flags, \
 155                                                         direction, \
 156                                                         disable, \
 157                                                         cltv_expiry_delta, \
 158                                                         htlc_minimum_msat, \
 159                                                         fee_base_msat, \
 160                                                         fee_proportional_millionths, \
 161                                                         htlc_maximum_msat, \
 162                                                         blob_signed \
 163                                                 ) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11)  ON CONFLICT DO NOTHING", &[
 164                                                         &scid,
 165                                                         &timestamp,
 166                                                         &(update.contents.flags as i16),
 167                                                         &direction,
 168                                                         &disable,
 169                                                         &cltv_expiry_delta,
 170                                                         &htlc_minimum_msat,
 171                                                         &fee_base_msat,
 172                                                         &fee_proportional_millionths,
 173                                                         &htlc_maximum_msat,
 174                                                         &update_signed
 175                                                 ])).await.unwrap().unwrap();
 176                                 }
 177                         }
 178                 }
 179         }
 180
 181         fn persist_network_graph(&self) {
 182                 println!("Caching network graph…");
 183                 let cache_path = config::network_graph_cache_path();
 184                 let file = OpenOptions::new()
 185                         .create(true)
 186                         .write(true)
 187                         .truncate(true)
 188                         .open(&cache_path)
 189                         .unwrap();
 190                 self.network_graph.remove_stale_channels_and_tracking();
 191                 let mut writer = BufWriter::new(file);
 192                 self.network_graph.write(&mut writer).unwrap();
 193                 writer.flush().unwrap();
 194                 println!("Cached network graph!");
 195         }
 196 }