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