#![deny(non_upper_case_globals)]
#![deny(non_camel_case_types)]
#![deny(non_snake_case)]
-#![deny(unused_mut)]
#![deny(unused_variables)]
#![deny(unused_imports)]
use std::io::BufReader;
use std::sync::Arc;
-use bitcoin::blockdata::constants::genesis_block;
-use bitcoin::Network;
-use bitcoin::secp256k1::PublicKey;
-use lightning::routing::gossip::NetworkGraph;
+use lightning::routing::gossip::{NetworkGraph, NodeId};
use lightning::util::ser::{ReadableArgs, Writeable};
use tokio::sync::mpsc;
use crate::lookup::DeltaSet;
mod hex_utils;
mod verifier;
+/// The purpose of this prefix is to identify the serialization format, should other rapid gossip
+/// sync formats arise in the future.
+///
+/// The fourth byte is the protocol version in case our format gets updated.
+const GOSSIP_PREFIX: [u8; 4] = [76, 68, 75, 1];
+
pub struct RapidSyncProcessor {
network_graph: Arc<NetworkGraph<TestLogger>>,
}
impl RapidSyncProcessor {
pub fn new() -> Self {
+ let network = config::network();
let logger = TestLogger::new();
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, logger);
if let Ok(network_graph) = network_graph_result {
- 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(), logger)
+ NetworkGraph::new(network, logger)
}
} else {
- NetworkGraph::new(genesis_block(Network::Bitcoin).header.block_hash(), logger)
+ NetworkGraph::new(network, logger)
};
let arc_network_graph = Arc::new(network_graph);
Self {
}
}
+/// This method generates a no-op blob that can be used as a delta where none exists.
+///
+/// The primary purpose of this method is the scenario of a client retrieving and processing a
+/// given snapshot, and then immediately retrieving the would-be next snapshot at the timestamp
+/// indicated by the one that was just processed.
+/// Previously, there would not be a new snapshot to be processed for that particular timestamp yet,
+/// and the server would return a 404 error.
+///
+/// In principle, this method could also be used to address another unfortunately all too common
+/// pitfall: requesting snapshots from intermediate timestamps, i. e. those that are not multiples
+/// of our granularity constant. Note that for that purpose, this method could be very dangerous,
+/// because if consumed, the `timestamp` value calculated here will overwrite the timestamp that
+/// the client previously had, which could result in duplicated or omitted gossip down the line.
+fn serialize_empty_blob(current_timestamp: u64) -> Vec<u8> {
+ let mut blob = GOSSIP_PREFIX.to_vec();
+
+ let network = config::network();
+ let genesis_block = bitcoin::blockdata::constants::genesis_block(network);
+ let chain_hash = genesis_block.block_hash();
+ chain_hash.write(&mut blob).unwrap();
+
+ let blob_timestamp = Snapshotter::round_down_to_nearest_multiple(current_timestamp, config::SNAPSHOT_CALCULATION_INTERVAL as u64) as u32;
+ blob_timestamp.write(&mut blob).unwrap();
+
+ 0u32.write(&mut blob).unwrap(); // node count
+ 0u32.write(&mut blob).unwrap(); // announcement count
+ 0u32.write(&mut blob).unwrap(); // update count
+
+ blob
+}
+
async fn serialize_delta(network_graph: Arc<NetworkGraph<TestLogger>>, last_sync_timestamp: u32, consider_intermediate_updates: bool) -> SerializedResponse {
let (client, connection) = lookup::connect_to_db().await;
+ network_graph.remove_stale_channels_and_tracking();
+
tokio::spawn(async move {
if let Err(e) = connection.await {
panic!("connection error: {}", e);
// 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 node_id_set: HashSet<NodeId> = HashSet::new();
+ let mut node_id_indices: HashMap<NodeId, usize> = HashMap::new();
+ let mut node_ids: Vec<NodeId> = 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) {
+ let mut get_node_id_index = |node_id: NodeId| {
+ if node_id_set.insert(node_id) {
node_ids.push(node_id);
let index = node_ids.len() - 1;
- node_id_indices.insert(serialized_node_id, index);
+ node_id_indices.insert(node_id, index);
return index;
}
duplicate_node_ids += 1;
- node_id_indices[&serialized_node_id]
+ node_id_indices[&node_id]
};
let mut delta_set = DeltaSet::new();
UpdateSerializationMechanism::Full => {
update_count_full += 1;
}
- UpdateSerializationMechanism::Incremental(_) => {
+ UpdateSerializationMechanism::Incremental(_) | UpdateSerializationMechanism::Reminder => {
update_count_incremental += 1;
}
};
// some stats
let message_count = announcement_count + update_count;
- let mut prefixed_output = vec![76, 68, 75, 1];
+ let mut prefixed_output = GOSSIP_PREFIX.to_vec();
// always write the chain hash
serialization_details.chain_hash.write(&mut prefixed_output).unwrap();
projects / rapid-gossip-sync-server / blobdiff