2 #![deny(broken_intra_doc_links)]
3 #![deny(private_intra_doc_links)]
4 #![deny(non_upper_case_globals)]
5 #![deny(non_camel_case_types)]
6 #![deny(non_snake_case)]
8 #![deny(unused_variables)]
9 #![deny(unused_imports)]
13 use std::collections::{HashMap, HashSet};
15 use std::io::BufReader;
18 use lightning::routing::gossip::{NetworkGraph, NodeId};
19 use lightning::util::ser::{ReadableArgs, Writeable};
20 use tokio::sync::mpsc;
21 use crate::lookup::DeltaSet;
23 use crate::persistence::GossipPersister;
24 use crate::serialization::UpdateSerializationMechanism;
25 use crate::snapshot::Snapshotter;
26 use crate::types::TestLogger;
39 pub struct RapidSyncProcessor {
40 network_graph: Arc<NetworkGraph<TestLogger>>,
43 pub struct SerializedResponse {
45 pub message_count: u32,
46 pub announcement_count: u32,
47 pub update_count: u32,
48 pub update_count_full: u32,
49 pub update_count_incremental: u32,
52 impl RapidSyncProcessor {
53 pub fn new() -> Self {
54 let network = config::network();
55 let logger = TestLogger::new();
56 let network_graph = if let Ok(file) = File::open(&config::network_graph_cache_path()) {
57 println!("Initializing from cached network graph…");
58 let mut buffered_reader = BufReader::new(file);
59 let network_graph_result = NetworkGraph::read(&mut buffered_reader, logger);
60 if let Ok(network_graph) = network_graph_result {
61 println!("Initialized from cached network graph!");
64 println!("Initialization from cached network graph failed: {}", network_graph_result.err().unwrap());
65 NetworkGraph::new(network, logger)
68 NetworkGraph::new(network, logger)
70 let arc_network_graph = Arc::new(network_graph);
72 network_graph: arc_network_graph,
76 pub async fn start_sync(&self) {
77 // means to indicate sync completion status within this module
78 let (sync_completion_sender, mut sync_completion_receiver) = mpsc::channel::<()>(1);
80 if config::DOWNLOAD_NEW_GOSSIP {
81 let (mut persister, persistence_sender) = GossipPersister::new(Arc::clone(&self.network_graph));
83 println!("Starting gossip download");
84 tokio::spawn(tracking::download_gossip(persistence_sender, sync_completion_sender,
85 Arc::clone(&self.network_graph)));
86 println!("Starting gossip db persistence listener");
87 tokio::spawn(async move { persister.persist_gossip().await; });
89 sync_completion_sender.send(()).await.unwrap();
92 let sync_completion = sync_completion_receiver.recv().await;
93 if sync_completion.is_none() {
94 panic!("Sync failed!");
96 println!("Initial sync complete!");
98 // start the gossip snapshotting service
99 Snapshotter::new(Arc::clone(&self.network_graph)).snapshot_gossip().await;
103 async fn serialize_delta(network_graph: Arc<NetworkGraph<TestLogger>>, last_sync_timestamp: u32, consider_intermediate_updates: bool) -> SerializedResponse {
104 let (client, connection) = lookup::connect_to_db().await;
106 network_graph.remove_stale_channels_and_tracking();
108 tokio::spawn(async move {
109 if let Err(e) = connection.await {
110 panic!("connection error: {}", e);
114 let mut output: Vec<u8> = vec![];
116 // set a flag if the chain hash is prepended
117 // chain hash only necessary if either channel announcements or non-incremental updates are present
118 // for announcement-free incremental-only updates, chain hash can be skipped
120 let mut node_id_set: HashSet<NodeId> = HashSet::new();
121 let mut node_id_indices: HashMap<NodeId, usize> = HashMap::new();
122 let mut node_ids: Vec<NodeId> = Vec::new();
123 let mut duplicate_node_ids: i32 = 0;
125 let mut get_node_id_index = |node_id: NodeId| {
126 if node_id_set.insert(node_id) {
127 node_ids.push(node_id);
128 let index = node_ids.len() - 1;
129 node_id_indices.insert(node_id, index);
132 duplicate_node_ids += 1;
133 node_id_indices[&node_id]
136 let mut delta_set = DeltaSet::new();
137 lookup::fetch_channel_announcements(&mut delta_set, network_graph, &client, last_sync_timestamp).await;
138 println!("announcement channel count: {}", delta_set.len());
139 lookup::fetch_channel_updates(&mut delta_set, &client, last_sync_timestamp, consider_intermediate_updates).await;
140 println!("update-fetched channel count: {}", delta_set.len());
141 lookup::filter_delta_set(&mut delta_set);
142 println!("update-filtered channel count: {}", delta_set.len());
143 let serialization_details = serialization::serialize_delta_set(delta_set, last_sync_timestamp);
145 // process announcements
146 // write the number of channel announcements to the output
147 let announcement_count = serialization_details.announcements.len() as u32;
148 announcement_count.write(&mut output).unwrap();
149 let mut previous_announcement_scid = 0;
150 for current_announcement in serialization_details.announcements {
151 let id_index_1 = get_node_id_index(current_announcement.node_id_1);
152 let id_index_2 = get_node_id_index(current_announcement.node_id_2);
153 let mut stripped_announcement = serialization::serialize_stripped_channel_announcement(¤t_announcement, id_index_1, id_index_2, previous_announcement_scid);
154 output.append(&mut stripped_announcement);
156 previous_announcement_scid = current_announcement.short_channel_id;
160 let mut previous_update_scid = 0;
161 let update_count = serialization_details.updates.len() as u32;
162 update_count.write(&mut output).unwrap();
164 let default_update_values = serialization_details.full_update_defaults;
165 if update_count > 0 {
166 default_update_values.cltv_expiry_delta.write(&mut output).unwrap();
167 default_update_values.htlc_minimum_msat.write(&mut output).unwrap();
168 default_update_values.fee_base_msat.write(&mut output).unwrap();
169 default_update_values.fee_proportional_millionths.write(&mut output).unwrap();
170 default_update_values.htlc_maximum_msat.write(&mut output).unwrap();
173 let mut update_count_full = 0;
174 let mut update_count_incremental = 0;
175 for current_update in serialization_details.updates {
176 match ¤t_update.mechanism {
177 UpdateSerializationMechanism::Full => {
178 update_count_full += 1;
180 UpdateSerializationMechanism::Incremental(_) => {
181 update_count_incremental += 1;
185 let mut stripped_update = serialization::serialize_stripped_channel_update(¤t_update, &default_update_values, previous_update_scid);
186 output.append(&mut stripped_update);
188 previous_update_scid = current_update.update.short_channel_id;
192 let message_count = announcement_count + update_count;
194 let mut prefixed_output = vec![76, 68, 75, 1];
196 // always write the chain hash
197 serialization_details.chain_hash.write(&mut prefixed_output).unwrap();
198 // always write the latest seen timestamp
199 let latest_seen_timestamp = serialization_details.latest_seen;
200 let overflow_seconds = latest_seen_timestamp % config::SNAPSHOT_CALCULATION_INTERVAL;
201 let serialized_seen_timestamp = latest_seen_timestamp.saturating_sub(overflow_seconds);
202 serialized_seen_timestamp.write(&mut prefixed_output).unwrap();
204 let node_id_count = node_ids.len() as u32;
205 node_id_count.write(&mut prefixed_output).unwrap();
207 for current_node_id in node_ids {
208 current_node_id.write(&mut prefixed_output).unwrap();
211 prefixed_output.append(&mut output);
213 println!("duplicated node ids: {}", duplicate_node_ids);
214 println!("latest seen timestamp: {:?}", serialization_details.latest_seen);
217 data: prefixed_output,
222 update_count_incremental,