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

   1 use std::sync::{Arc, RwLock};
   2
   3 use bitcoin::secp256k1::PublicKey;
   4 use lightning::ln::msgs::{ChannelAnnouncement, ChannelUpdate, Init, LightningError, NodeAnnouncement, QueryChannelRange, QueryShortChannelIds, ReplyChannelRange, ReplyShortChannelIdsEnd, RoutingMessageHandler};
   5 use lightning::routing::gossip::{NetworkGraph, P2PGossipSync};
   6 use lightning::util::events::{MessageSendEvent, MessageSendEventsProvider};
   7 use tokio::sync::mpsc;
   8 use tokio::sync::mpsc::error::TrySendError;
   9
  10 use crate::TestLogger;
  11 use crate::types::{GossipMessage, GossipChainAccess};
  12 use crate::verifier::ChainVerifier;
  13
  14 pub(crate) struct GossipCounter {
  15         pub(crate) channel_announcements: u64,
  16         pub(crate) channel_updates: u64,
  17         pub(crate) channel_updates_without_htlc_max_msats: u64,
  18         pub(crate) channel_announcements_with_mismatched_scripts: u64
  19 }
  20
  21 impl GossipCounter {
  22         pub(crate) fn new() -> Self {
  23                 Self {
  24                         channel_announcements: 0,
  25                         channel_updates: 0,
  26                         channel_updates_without_htlc_max_msats: 0,
  27                         channel_announcements_with_mismatched_scripts: 0,
  28                 }
  29         }
  30 }
  31
  32 pub(crate) struct GossipRouter {
  33         native_router: P2PGossipSync<Arc<NetworkGraph<TestLogger>>, GossipChainAccess, TestLogger>,
  34         pub(crate) counter: RwLock<GossipCounter>,
  35         sender: mpsc::Sender<GossipMessage>,
  36 }
  37
  38 impl GossipRouter {
  39         pub(crate) fn new(network_graph: Arc<NetworkGraph<TestLogger>>, sender: mpsc::Sender<GossipMessage>) -> Self {
  40                 Self {
  41                         native_router: P2PGossipSync::new(network_graph, Some(Arc::new(ChainVerifier::new())), TestLogger::new()),
  42                         counter: RwLock::new(GossipCounter::new()),
  43                         sender
  44                 }
  45         }
  46 }
  47
  48 impl MessageSendEventsProvider for GossipRouter {
  49         fn get_and_clear_pending_msg_events(&self) -> Vec<MessageSendEvent> {
  50                 self.native_router.get_and_clear_pending_msg_events()
  51         }
  52 }
  53
  54 impl RoutingMessageHandler for GossipRouter {
  55         fn handle_node_announcement(&self, msg: &NodeAnnouncement) -> Result<bool, LightningError> {
  56                 self.native_router.handle_node_announcement(msg)
  57         }
  58
  59         fn handle_channel_announcement(&self, msg: &ChannelAnnouncement) -> Result<bool, LightningError> {
  60                 let native_result = self.native_router.handle_channel_announcement(msg);
  61                 let output_value;
  62                 {
  63                         let mut counter = self.counter.write().unwrap();
  64                         output_value = native_result.map_err(|error| {
  65                                 if error.err.contains("didn't match on-chain script") {
  66                                         counter.channel_announcements_with_mismatched_scripts += 1;
  67                                 }
  68                                 error
  69                         })?;
  70                         counter.channel_announcements += 1;
  71                 }
  72
  73                 let gossip_message = GossipMessage::ChannelAnnouncement(msg.clone());
  74                 if let Err(err) = self.sender.try_send(gossip_message) {
  75                         let gossip_message = match err { TrySendError::Full(msg)|TrySendError::Closed(msg) => msg };
  76                         tokio::task::block_in_place(move || { tokio::runtime::Handle::current().block_on(async move {
  77                                 self.sender.send(gossip_message).await.unwrap();
  78                         })});
  79                 }
  80
  81                 Ok(output_value)
  82         }
  83
  84         fn handle_channel_update(&self, msg: &ChannelUpdate) -> Result<bool, LightningError> {
  85                 let output_value = self.native_router.handle_channel_update(msg)?;
  86
  87                 self.counter.write().unwrap().channel_updates += 1;
  88                 let gossip_message = GossipMessage::ChannelUpdate(msg.clone());
  89
  90                 if let Err(err) = self.sender.try_send(gossip_message) {
  91                         let gossip_message = match err { TrySendError::Full(msg)|TrySendError::Closed(msg) => msg };
  92                         tokio::task::block_in_place(move || { tokio::runtime::Handle::current().block_on(async move {
  93                                 self.sender.send(gossip_message).await.unwrap();
  94                         })});
  95                 }
  96
  97                 Ok(output_value)
  98         }
  99
 100         fn get_next_channel_announcements(&self, starting_point: u64, batch_amount: u8) -> Vec<(ChannelAnnouncement, Option<ChannelUpdate>, Option<ChannelUpdate>)> {
 101                 self.native_router.get_next_channel_announcements(starting_point, batch_amount)
 102         }
 103
 104         fn get_next_node_announcements(&self, starting_point: Option<&PublicKey>, batch_amount: u8) -> Vec<NodeAnnouncement> {
 105                 self.native_router.get_next_node_announcements(starting_point, batch_amount)
 106         }
 107
 108         fn peer_connected(&self, their_node_id: &PublicKey, init: &Init) {
 109                 self.native_router.peer_connected(their_node_id, init)
 110         }
 111
 112         fn handle_reply_channel_range(&self, their_node_id: &PublicKey, msg: ReplyChannelRange) -> Result<(), LightningError> {
 113                 self.native_router.handle_reply_channel_range(their_node_id, msg)
 114         }
 115
 116         fn handle_reply_short_channel_ids_end(&self, their_node_id: &PublicKey, msg: ReplyShortChannelIdsEnd) -> Result<(), LightningError> {
 117                 self.native_router.handle_reply_short_channel_ids_end(their_node_id, msg)
 118         }
 119
 120         fn handle_query_channel_range(&self, their_node_id: &PublicKey, msg: QueryChannelRange) -> Result<(), LightningError> {
 121                 self.native_router.handle_query_channel_range(their_node_id, msg)
 122         }
 123
 124         fn handle_query_short_channel_ids(&self, their_node_id: &PublicKey, msg: QueryShortChannelIds) -> Result<(), LightningError> {
 125                 self.native_router.handle_query_short_channel_ids(their_node_id, msg)
 126         }
 127 }