--- /dev/null
+#![deny(unsafe_code)]
+#![deny(broken_intra_doc_links)]
+#![deny(private_intra_doc_links)]
+#![deny(non_upper_case_globals)]
+#![deny(non_camel_case_types)]
+#![deny(non_snake_case)]
+#![deny(unused_mut)]
+#![deny(unused_variables)]
+#![deny(unused_imports)]
+
+extern crate core;
+
+use std::collections::{HashMap, HashSet};
+use std::fs::File;
+use std::io::BufReader;
+use std::sync::Arc;
+use std::sync::atomic::{AtomicBool, Ordering};
+
+use bitcoin::blockdata::constants::genesis_block;
+use bitcoin::Network;
+use bitcoin::secp256k1::PublicKey;
+use lightning::routing::gossip::NetworkGraph;
+use lightning::util::ser::{ReadableArgs, Writeable};
+use tokio::sync::mpsc;
+use crate::lookup::DeltaSet;
+
+use crate::persistence::GossipPersister;
+use crate::serialization::UpdateSerializationMechanism;
+use crate::snapshot::Snapshotter;
+use crate::types::{GossipChainAccess, TestLogger};
+
+mod downloader;
+mod types;
+mod tracking;
+mod lookup;
+mod persistence;
+mod serialization;
+mod snapshot;
+mod config;
+mod hex_utils;
+mod verifier;
+
+pub struct RapidSyncProcessor {
+ network_graph: Arc<NetworkGraph<Arc<TestLogger>>>,
+ pub initial_sync_complete: Arc<AtomicBool>,
+}
+
+pub struct SerializedResponse {
+ pub data: Vec<u8>,
+ pub message_count: u32,
+ pub announcement_count: u32,
+ pub update_count: u32,
+ pub update_count_full: u32,
+ pub update_count_incremental: u32,
+}
+
+impl RapidSyncProcessor {
+ pub fn new() -> Self {
+ let logger = TestLogger::new();
+ let mut initial_sync_complete = false;
+ let arc_logger = Arc::new(logger);
+ let network_graph = if let Ok(file) = File::open(&config::network_graph_cache_path()) {
+ println!("Initializing from cached network graph…");
+ let mut buffered_reader = BufReader::new(file);
+ let network_graph_result = NetworkGraph::read(&mut buffered_reader, Arc::clone(&arc_logger));
+ if let Ok(network_graph) = network_graph_result {
+ initial_sync_complete = true;
+ network_graph.remove_stale_channels();
+ println!("Initialized from cached network graph!");
+ network_graph
+ } else {
+ println!("Initialization from cached network graph failed: {}", network_graph_result.err().unwrap());
+ NetworkGraph::new(genesis_block(Network::Bitcoin).header.block_hash(), arc_logger)
+ }
+ } else {
+ NetworkGraph::new(genesis_block(Network::Bitcoin).header.block_hash(), arc_logger)
+ };
+ let arc_network_graph = Arc::new(network_graph);
+ let (_sync_termination_sender, _sync_termination_receiver) = mpsc::channel::<()>(1);
+ Self {
+ network_graph: arc_network_graph,
+ initial_sync_complete: Arc::new(AtomicBool::new(initial_sync_complete)),
+ }
+ }
+
+ pub async fn start_sync(&self) {
+ // means to indicate sync completion status within this module
+ let (sync_completion_sender, mut sync_completion_receiver) = mpsc::channel::<()>(1);
+ let initial_sync_complete = self.initial_sync_complete.clone();
+
+ let network_graph = self.network_graph.clone();
+ let snapshotter = Snapshotter::new(network_graph.clone());
+
+ if config::DOWNLOAD_NEW_GOSSIP {
+
+ let mut persister = GossipPersister::new(sync_completion_sender, self.network_graph.clone());
+
+ let persistence_sender = persister.gossip_persistence_sender.clone();
+ println!("Starting gossip download");
+ let download_future = tracking::download_gossip(persistence_sender, network_graph.clone());
+ tokio::spawn(async move {
+ // initiate the whole download stuff in the background
+ download_future.await;
+ });
+ println!("Starting gossip db persistence listener");
+ tokio::spawn(async move {
+ // initiate persistence of the gossip data
+ let persistence_future = persister.persist_gossip();
+ persistence_future.await;
+ });
+
+ } else {
+ sync_completion_sender.send(()).await.unwrap();
+ }
+
+ {
+ let sync_completion = sync_completion_receiver.recv().await;
+ if sync_completion.is_none() {
+ panic!("Sync failed!");
+ }
+ initial_sync_complete.store(true, Ordering::Release);
+ println!("Initial sync complete!");
+
+ // start the gossip snapshotting service
+ snapshotter.snapshot_gossip().await;
+ }
+ }
+
+ pub async fn serialize_delta(&self, last_sync_timestamp: u32, consider_intermediate_updates: bool) -> SerializedResponse {
+ crate::serialize_delta(self.network_graph.clone(), last_sync_timestamp, consider_intermediate_updates).await
+ }
+}
+
+async fn serialize_delta(network_graph: Arc<NetworkGraph<Arc<TestLogger>>>, last_sync_timestamp: u32, consider_intermediate_updates: bool) -> SerializedResponse {
+ let (client, connection) = lookup::connect_to_db().await;
+
+ tokio::spawn(async move {
+ if let Err(e) = connection.await {
+ panic!("connection error: {}", e);
+ }
+ });
+
+ let mut output: Vec<u8> = vec![];
+
+ // set a flag if the chain hash is prepended
+ // chain hash only necessary if either channel announcements or non-incremental updates are present
+ // for announcement-free incremental-only updates, chain hash can be skipped
+
+ let mut node_id_set: HashSet<[u8; 33]> = HashSet::new();
+ let mut node_id_indices: HashMap<[u8; 33], usize> = HashMap::new();
+ let mut node_ids: Vec<PublicKey> = Vec::new();
+ let mut duplicate_node_ids: i32 = 0;
+
+ let mut get_node_id_index = |node_id: PublicKey| {
+ let serialized_node_id = node_id.serialize();
+ if node_id_set.insert(serialized_node_id) {
+ node_ids.push(node_id);
+ let index = node_ids.len() - 1;
+ node_id_indices.insert(serialized_node_id, index);
+ return index;
+ }
+ duplicate_node_ids += 1;
+ node_id_indices[&serialized_node_id]
+ };
+
+ let mut delta_set = DeltaSet::new();
+ lookup::fetch_channel_announcements(&mut delta_set, network_graph, &client, last_sync_timestamp).await;
+ println!("announcement channel count: {}", delta_set.len());
+ lookup::fetch_channel_updates(&mut delta_set, &client, last_sync_timestamp, consider_intermediate_updates).await;
+ println!("update-fetched channel count: {}", delta_set.len());
+ lookup::filter_delta_set(&mut delta_set);
+ println!("update-filtered channel count: {}", delta_set.len());
+ let serialization_details = serialization::serialize_delta_set(delta_set, last_sync_timestamp);
+
+ // process announcements
+ // write the number of channel announcements to the output
+ let announcement_count = serialization_details.announcements.len() as u32;
+ announcement_count.write(&mut output).unwrap();
+ let mut previous_announcement_scid = 0;
+ for current_announcement in serialization_details.announcements {
+ let id_index_1 = get_node_id_index(current_announcement.node_id_1);
+ let id_index_2 = get_node_id_index(current_announcement.node_id_2);
+ let mut stripped_announcement = serialization::serialize_stripped_channel_announcement(¤t_announcement, id_index_1, id_index_2, previous_announcement_scid);
+ output.append(&mut stripped_announcement);
+
+ previous_announcement_scid = current_announcement.short_channel_id;
+ }
+
+ // process updates
+ let mut previous_update_scid = 0;
+ let update_count = serialization_details.updates.len() as u32;
+ update_count.write(&mut output).unwrap();
+
+ let default_update_values = serialization_details.full_update_defaults;
+ if update_count > 0 {
+ default_update_values.cltv_expiry_delta.write(&mut output).unwrap();
+ default_update_values.htlc_minimum_msat.write(&mut output).unwrap();
+ default_update_values.fee_base_msat.write(&mut output).unwrap();
+ default_update_values.fee_proportional_millionths.write(&mut output).unwrap();
+ default_update_values.htlc_maximum_msat.write(&mut output).unwrap();
+ }
+
+ let mut update_count_full = 0;
+ let mut update_count_incremental = 0;
+ for current_update in serialization_details.updates {
+ match ¤t_update.mechanism {
+ UpdateSerializationMechanism::Full => {
+ update_count_full += 1;
+ }
+ UpdateSerializationMechanism::Incremental(_) => {
+ update_count_incremental += 1;
+ }
+ };
+
+ let mut stripped_update = serialization::serialize_stripped_channel_update(¤t_update, &default_update_values, previous_update_scid);
+ output.append(&mut stripped_update);
+
+ previous_update_scid = current_update.update.short_channel_id;
+ }
+
+ // some stats
+ let message_count = announcement_count + update_count;
+
+ let mut prefixed_output = vec![76, 68, 75, 1];
+
+ // always write the chain hash
+ serialization_details.chain_hash.write(&mut prefixed_output).unwrap();
+ // always write the latest seen timestamp
+ let latest_seen_timestamp = serialization_details.latest_seen;
+ let overflow_seconds = latest_seen_timestamp % config::SNAPSHOT_CALCULATION_INTERVAL;
+ let serialized_seen_timestamp = latest_seen_timestamp.saturating_sub(overflow_seconds);
+ serialized_seen_timestamp.write(&mut prefixed_output).unwrap();
+
+ let node_id_count = node_ids.len() as u32;
+ node_id_count.write(&mut prefixed_output).unwrap();
+
+ for current_node_id in node_ids {
+ current_node_id.write(&mut prefixed_output).unwrap();
+ }
+
+ prefixed_output.append(&mut output);
+
+ println!("duplicated node ids: {}", duplicate_node_ids);
+ println!("latest seen timestamp: {:?}", serialization_details.latest_seen);
+
+ SerializedResponse {
+ data: prefixed_output,
+ message_count,
+ announcement_count,
+ update_count,
+ update_count_full,
+ update_count_incremental,
+ }
+}
projects / rapid-gossip-sync-server / blobdiff