1 //! Utilities that take care of tasks that (1) need to happen periodically to keep Rust-Lightning
2 //! running properly, and (2) either can or should be run in the background. See docs for
3 //! [`BackgroundProcessor`] for more details on the nitty-gritty.
5 // Prefix these with `rustdoc::` when we update our MSRV to be >= 1.52 to remove warnings.
6 #![deny(broken_intra_doc_links)]
7 #![deny(private_intra_doc_links)]
10 #![cfg_attr(not(feature = "futures"), deny(unsafe_code))]
12 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
14 #![cfg_attr(all(not(feature = "std"), not(test)), no_std)]
16 #[cfg(any(test, feature = "std"))]
19 #[cfg(not(feature = "std"))]
22 #[macro_use] extern crate lightning;
23 extern crate lightning_rapid_gossip_sync;
26 use lightning::chain::chaininterface::{BroadcasterInterface, FeeEstimator};
27 use lightning::chain::chainmonitor::{ChainMonitor, Persist};
28 use lightning::sign::{EntropySource, NodeSigner, SignerProvider};
29 use lightning::events::{Event, PathFailure};
30 #[cfg(feature = "std")]
31 use lightning::events::{EventHandler, EventsProvider};
32 use lightning::ln::channelmanager::ChannelManager;
33 use lightning::ln::peer_handler::APeerManager;
34 use lightning::routing::gossip::{NetworkGraph, P2PGossipSync};
35 use lightning::routing::utxo::UtxoLookup;
36 use lightning::routing::router::Router;
37 use lightning::routing::scoring::{Score, WriteableScore};
38 use lightning::util::logger::Logger;
39 use lightning::util::persist::Persister;
40 #[cfg(feature = "std")]
41 use lightning::util::wakers::Sleeper;
42 use lightning_rapid_gossip_sync::RapidGossipSync;
45 use core::time::Duration;
47 #[cfg(feature = "std")]
49 #[cfg(feature = "std")]
50 use core::sync::atomic::{AtomicBool, Ordering};
51 #[cfg(feature = "std")]
52 use std::thread::{self, JoinHandle};
53 #[cfg(feature = "std")]
54 use std::time::Instant;
56 #[cfg(not(feature = "std"))]
59 /// `BackgroundProcessor` takes care of tasks that (1) need to happen periodically to keep
60 /// Rust-Lightning running properly, and (2) either can or should be run in the background. Its
61 /// responsibilities are:
62 /// * Processing [`Event`]s with a user-provided [`EventHandler`].
63 /// * Monitoring whether the [`ChannelManager`] needs to be re-persisted to disk, and if so,
64 /// writing it to disk/backups by invoking the callback given to it at startup.
65 /// [`ChannelManager`] persistence should be done in the background.
66 /// * Calling [`ChannelManager::timer_tick_occurred`], [`ChainMonitor::rebroadcast_pending_claims`]
67 /// and [`PeerManager::timer_tick_occurred`] at the appropriate intervals.
68 /// * Calling [`NetworkGraph::remove_stale_channels_and_tracking`] (if a [`GossipSync`] with a
69 /// [`NetworkGraph`] is provided to [`BackgroundProcessor::start`]).
71 /// It will also call [`PeerManager::process_events`] periodically though this shouldn't be relied
72 /// upon as doing so may result in high latency.
76 /// If [`ChannelManager`] persistence fails and the persisted manager becomes out-of-date, then
77 /// there is a risk of channels force-closing on startup when the manager realizes it's outdated.
78 /// However, as long as [`ChannelMonitor`] backups are sound, no funds besides those used for
79 /// unilateral chain closure fees are at risk.
81 /// [`ChannelMonitor`]: lightning::chain::channelmonitor::ChannelMonitor
82 /// [`Event`]: lightning::events::Event
83 /// [`PeerManager::timer_tick_occurred`]: lightning::ln::peer_handler::PeerManager::timer_tick_occurred
84 /// [`PeerManager::process_events`]: lightning::ln::peer_handler::PeerManager::process_events
85 #[cfg(feature = "std")]
86 #[must_use = "BackgroundProcessor will immediately stop on drop. It should be stored until shutdown."]
87 pub struct BackgroundProcessor {
88 stop_thread: Arc<AtomicBool>,
89 thread_handle: Option<JoinHandle<Result<(), std::io::Error>>>,
93 const FRESHNESS_TIMER: u64 = 60;
95 const FRESHNESS_TIMER: u64 = 1;
97 #[cfg(all(not(test), not(debug_assertions)))]
98 const PING_TIMER: u64 = 10;
99 /// Signature operations take a lot longer without compiler optimisations.
100 /// Increasing the ping timer allows for this but slower devices will be disconnected if the
101 /// timeout is reached.
102 #[cfg(all(not(test), debug_assertions))]
103 const PING_TIMER: u64 = 30;
105 const PING_TIMER: u64 = 1;
107 /// Prune the network graph of stale entries hourly.
108 const NETWORK_PRUNE_TIMER: u64 = 60 * 60;
111 const SCORER_PERSIST_TIMER: u64 = 60 * 60;
113 const SCORER_PERSIST_TIMER: u64 = 1;
116 const FIRST_NETWORK_PRUNE_TIMER: u64 = 60;
118 const FIRST_NETWORK_PRUNE_TIMER: u64 = 1;
121 const REBROADCAST_TIMER: u64 = 30;
123 const REBROADCAST_TIMER: u64 = 1;
125 #[cfg(feature = "futures")]
126 /// core::cmp::min is not currently const, so we define a trivial (and equivalent) replacement
127 const fn min_u64(a: u64, b: u64) -> u64 { if a < b { a } else { b } }
128 #[cfg(feature = "futures")]
129 const FASTEST_TIMER: u64 = min_u64(min_u64(FRESHNESS_TIMER, PING_TIMER),
130 min_u64(SCORER_PERSIST_TIMER, min_u64(FIRST_NETWORK_PRUNE_TIMER, REBROADCAST_TIMER)));
132 /// Either [`P2PGossipSync`] or [`RapidGossipSync`].
134 P: Deref<Target = P2PGossipSync<G, U, L>>,
135 R: Deref<Target = RapidGossipSync<G, L>>,
136 G: Deref<Target = NetworkGraph<L>>,
140 where U::Target: UtxoLookup, L::Target: Logger {
141 /// Gossip sync via the lightning peer-to-peer network as defined by BOLT 7.
143 /// Rapid gossip sync from a trusted server.
150 P: Deref<Target = P2PGossipSync<G, U, L>>,
151 R: Deref<Target = RapidGossipSync<G, L>>,
152 G: Deref<Target = NetworkGraph<L>>,
155 > GossipSync<P, R, G, U, L>
156 where U::Target: UtxoLookup, L::Target: Logger {
157 fn network_graph(&self) -> Option<&G> {
159 GossipSync::P2P(gossip_sync) => Some(gossip_sync.network_graph()),
160 GossipSync::Rapid(gossip_sync) => Some(gossip_sync.network_graph()),
161 GossipSync::None => None,
165 fn prunable_network_graph(&self) -> Option<&G> {
167 GossipSync::P2P(gossip_sync) => Some(gossip_sync.network_graph()),
168 GossipSync::Rapid(gossip_sync) => {
169 if gossip_sync.is_initial_sync_complete() {
170 Some(gossip_sync.network_graph())
175 GossipSync::None => None,
180 /// This is not exported to bindings users as the bindings concretize everything and have constructors for us
181 impl<P: Deref<Target = P2PGossipSync<G, U, L>>, G: Deref<Target = NetworkGraph<L>>, U: Deref, L: Deref>
182 GossipSync<P, &RapidGossipSync<G, L>, G, U, L>
184 U::Target: UtxoLookup,
187 /// Initializes a new [`GossipSync::P2P`] variant.
188 pub fn p2p(gossip_sync: P) -> Self {
189 GossipSync::P2P(gossip_sync)
193 /// This is not exported to bindings users as the bindings concretize everything and have constructors for us
194 impl<'a, R: Deref<Target = RapidGossipSync<G, L>>, G: Deref<Target = NetworkGraph<L>>, L: Deref>
196 &P2PGossipSync<G, &'a (dyn UtxoLookup + Send + Sync), L>,
199 &'a (dyn UtxoLookup + Send + Sync),
205 /// Initializes a new [`GossipSync::Rapid`] variant.
206 pub fn rapid(gossip_sync: R) -> Self {
207 GossipSync::Rapid(gossip_sync)
211 /// This is not exported to bindings users as the bindings concretize everything and have constructors for us
214 &P2PGossipSync<&'a NetworkGraph<L>, &'a (dyn UtxoLookup + Send + Sync), L>,
215 &RapidGossipSync<&'a NetworkGraph<L>, L>,
217 &'a (dyn UtxoLookup + Send + Sync),
223 /// Initializes a new [`GossipSync::None`] variant.
224 pub fn none() -> Self {
229 fn handle_network_graph_update<L: Deref>(
230 network_graph: &NetworkGraph<L>, event: &Event
231 ) where L::Target: Logger {
232 if let Event::PaymentPathFailed {
233 failure: PathFailure::OnPath { network_update: Some(ref upd) }, .. } = event
235 network_graph.handle_network_update(upd);
239 /// Updates scorer based on event and returns whether an update occurred so we can decide whether
241 fn update_scorer<'a, S: 'static + Deref<Target = SC> + Send + Sync, SC: 'a + WriteableScore<'a>>(
242 scorer: &'a S, event: &Event
244 let mut score = scorer.lock();
246 Event::PaymentPathFailed { ref path, short_channel_id: Some(scid), .. } => {
247 score.payment_path_failed(path, *scid);
249 Event::PaymentPathFailed { ref path, payment_failed_permanently: true, .. } => {
250 // Reached if the destination explicitly failed it back. We treat this as a successful probe
251 // because the payment made it all the way to the destination with sufficient liquidity.
252 score.probe_successful(path);
254 Event::PaymentPathSuccessful { path, .. } => {
255 score.payment_path_successful(path);
257 Event::ProbeSuccessful { path, .. } => {
258 score.probe_successful(path);
260 Event::ProbeFailed { path, short_channel_id: Some(scid), .. } => {
261 score.probe_failed(path, *scid);
268 macro_rules! define_run_body {
269 ($persister: ident, $chain_monitor: ident, $process_chain_monitor_events: expr,
270 $channel_manager: ident, $process_channel_manager_events: expr,
271 $gossip_sync: ident, $peer_manager: ident, $logger: ident, $scorer: ident,
272 $loop_exit_check: expr, $await: expr, $get_timer: expr, $timer_elapsed: expr,
273 $check_slow_await: expr)
275 log_trace!($logger, "Calling ChannelManager's timer_tick_occurred on startup");
276 $channel_manager.timer_tick_occurred();
277 log_trace!($logger, "Rebroadcasting monitor's pending claims on startup");
278 $chain_monitor.rebroadcast_pending_claims();
280 let mut last_freshness_call = $get_timer(FRESHNESS_TIMER);
281 let mut last_ping_call = $get_timer(PING_TIMER);
282 let mut last_prune_call = $get_timer(FIRST_NETWORK_PRUNE_TIMER);
283 let mut last_scorer_persist_call = $get_timer(SCORER_PERSIST_TIMER);
284 let mut last_rebroadcast_call = $get_timer(REBROADCAST_TIMER);
285 let mut have_pruned = false;
288 $process_channel_manager_events;
289 $process_chain_monitor_events;
291 // Note that the PeerManager::process_events may block on ChannelManager's locks,
292 // hence it comes last here. When the ChannelManager finishes whatever it's doing,
293 // we want to ensure we get into `persist_manager` as quickly as we can, especially
294 // without running the normal event processing above and handing events to users.
296 // Specifically, on an *extremely* slow machine, we may see ChannelManager start
297 // processing a message effectively at any point during this loop. In order to
298 // minimize the time between such processing completing and persisting the updated
299 // ChannelManager, we want to minimize methods blocking on a ChannelManager
300 // generally, and as a fallback place such blocking only immediately before
302 $peer_manager.as_ref().process_events();
304 // Exit the loop if the background processor was requested to stop.
305 if $loop_exit_check {
306 log_trace!($logger, "Terminating background processor.");
310 // We wait up to 100ms, but track how long it takes to detect being put to sleep,
311 // see `await_start`'s use below.
312 let mut await_start = None;
313 if $check_slow_await { await_start = Some($get_timer(1)); }
314 let updates_available = $await;
315 let await_slow = if $check_slow_await { $timer_elapsed(&mut await_start.unwrap(), 1) } else { false };
317 // Exit the loop if the background processor was requested to stop.
318 if $loop_exit_check {
319 log_trace!($logger, "Terminating background processor.");
323 if updates_available {
324 log_trace!($logger, "Persisting ChannelManager...");
325 $persister.persist_manager(&*$channel_manager)?;
326 log_trace!($logger, "Done persisting ChannelManager.");
328 if $timer_elapsed(&mut last_freshness_call, FRESHNESS_TIMER) {
329 log_trace!($logger, "Calling ChannelManager's timer_tick_occurred");
330 $channel_manager.timer_tick_occurred();
331 last_freshness_call = $get_timer(FRESHNESS_TIMER);
334 // On various platforms, we may be starved of CPU cycles for several reasons.
335 // E.g. on iOS, if we've been in the background, we will be entirely paused.
336 // Similarly, if we're on a desktop platform and the device has been asleep, we
337 // may not get any cycles.
338 // We detect this by checking if our max-100ms-sleep, above, ran longer than a
339 // full second, at which point we assume sockets may have been killed (they
340 // appear to be at least on some platforms, even if it has only been a second).
341 // Note that we have to take care to not get here just because user event
342 // processing was slow at the top of the loop. For example, the sample client
343 // may call Bitcoin Core RPCs during event handling, which very often takes
344 // more than a handful of seconds to complete, and shouldn't disconnect all our
346 log_trace!($logger, "100ms sleep took more than a second, disconnecting peers.");
347 $peer_manager.as_ref().disconnect_all_peers();
348 last_ping_call = $get_timer(PING_TIMER);
349 } else if $timer_elapsed(&mut last_ping_call, PING_TIMER) {
350 log_trace!($logger, "Calling PeerManager's timer_tick_occurred");
351 $peer_manager.as_ref().timer_tick_occurred();
352 last_ping_call = $get_timer(PING_TIMER);
355 // Note that we want to run a graph prune once not long after startup before
356 // falling back to our usual hourly prunes. This avoids short-lived clients never
357 // pruning their network graph. We run once 60 seconds after startup before
358 // continuing our normal cadence. For RGS, since 60 seconds is likely too long,
359 // we prune after an initial sync completes.
360 let prune_timer = if have_pruned { NETWORK_PRUNE_TIMER } else { FIRST_NETWORK_PRUNE_TIMER };
361 let prune_timer_elapsed = $timer_elapsed(&mut last_prune_call, prune_timer);
362 let should_prune = match $gossip_sync {
363 GossipSync::Rapid(_) => !have_pruned || prune_timer_elapsed,
364 _ => prune_timer_elapsed,
367 // The network graph must not be pruned while rapid sync completion is pending
368 if let Some(network_graph) = $gossip_sync.prunable_network_graph() {
369 #[cfg(feature = "std")] {
370 log_trace!($logger, "Pruning and persisting network graph.");
371 network_graph.remove_stale_channels_and_tracking();
373 #[cfg(not(feature = "std"))] {
374 log_warn!($logger, "Not pruning network graph, consider enabling `std` or doing so manually with remove_stale_channels_and_tracking_with_time.");
375 log_trace!($logger, "Persisting network graph.");
378 if let Err(e) = $persister.persist_graph(network_graph) {
379 log_error!($logger, "Error: Failed to persist network graph, check your disk and permissions {}", e)
384 let prune_timer = if have_pruned { NETWORK_PRUNE_TIMER } else { FIRST_NETWORK_PRUNE_TIMER };
385 last_prune_call = $get_timer(prune_timer);
388 if $timer_elapsed(&mut last_scorer_persist_call, SCORER_PERSIST_TIMER) {
389 if let Some(ref scorer) = $scorer {
390 log_trace!($logger, "Persisting scorer");
391 if let Err(e) = $persister.persist_scorer(&scorer) {
392 log_error!($logger, "Error: Failed to persist scorer, check your disk and permissions {}", e)
395 last_scorer_persist_call = $get_timer(SCORER_PERSIST_TIMER);
398 if $timer_elapsed(&mut last_rebroadcast_call, REBROADCAST_TIMER) {
399 log_trace!($logger, "Rebroadcasting monitor's pending claims");
400 $chain_monitor.rebroadcast_pending_claims();
401 last_rebroadcast_call = $get_timer(REBROADCAST_TIMER);
405 // After we exit, ensure we persist the ChannelManager one final time - this avoids
406 // some races where users quit while channel updates were in-flight, with
407 // ChannelMonitor update(s) persisted without a corresponding ChannelManager update.
408 $persister.persist_manager(&*$channel_manager)?;
410 // Persist Scorer on exit
411 if let Some(ref scorer) = $scorer {
412 $persister.persist_scorer(&scorer)?;
415 // Persist NetworkGraph on exit
416 if let Some(network_graph) = $gossip_sync.network_graph() {
417 $persister.persist_graph(network_graph)?;
424 #[cfg(feature = "futures")]
425 pub(crate) mod futures_util {
426 use core::future::Future;
427 use core::task::{Poll, Waker, RawWaker, RawWakerVTable};
429 use core::marker::Unpin;
430 pub(crate) struct Selector<
431 A: Future<Output=()> + Unpin, B: Future<Output=()> + Unpin, C: Future<Output=bool> + Unpin
437 pub(crate) enum SelectorOutput {
442 A: Future<Output=()> + Unpin, B: Future<Output=()> + Unpin, C: Future<Output=bool> + Unpin
443 > Future for Selector<A, B, C> {
444 type Output = SelectorOutput;
445 fn poll(mut self: Pin<&mut Self>, ctx: &mut core::task::Context<'_>) -> Poll<SelectorOutput> {
446 match Pin::new(&mut self.a).poll(ctx) {
447 Poll::Ready(()) => { return Poll::Ready(SelectorOutput::A); },
450 match Pin::new(&mut self.b).poll(ctx) {
451 Poll::Ready(()) => { return Poll::Ready(SelectorOutput::B); },
454 match Pin::new(&mut self.c).poll(ctx) {
455 Poll::Ready(res) => { return Poll::Ready(SelectorOutput::C(res)); },
462 // If we want to poll a future without an async context to figure out if it has completed or
463 // not without awaiting, we need a Waker, which needs a vtable...we fill it with dummy values
464 // but sadly there's a good bit of boilerplate here.
465 fn dummy_waker_clone(_: *const ()) -> RawWaker { RawWaker::new(core::ptr::null(), &DUMMY_WAKER_VTABLE) }
466 fn dummy_waker_action(_: *const ()) { }
468 const DUMMY_WAKER_VTABLE: RawWakerVTable = RawWakerVTable::new(
469 dummy_waker_clone, dummy_waker_action, dummy_waker_action, dummy_waker_action);
470 pub(crate) fn dummy_waker() -> Waker { unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &DUMMY_WAKER_VTABLE)) } }
472 #[cfg(feature = "futures")]
473 use futures_util::{Selector, SelectorOutput, dummy_waker};
474 #[cfg(feature = "futures")]
477 /// Processes background events in a future.
479 /// `sleeper` should return a future which completes in the given amount of time and returns a
480 /// boolean indicating whether the background processing should exit. Once `sleeper` returns a
481 /// future which outputs `true`, the loop will exit and this function's future will complete.
482 /// The `sleeper` future is free to return early after it has triggered the exit condition.
484 /// See [`BackgroundProcessor::start`] for information on which actions this handles.
486 /// Requires the `futures` feature. Note that while this method is available without the `std`
487 /// feature, doing so will skip calling [`NetworkGraph::remove_stale_channels_and_tracking`],
488 /// you should call [`NetworkGraph::remove_stale_channels_and_tracking_with_time`] regularly
489 /// manually instead.
491 /// The `mobile_interruptable_platform` flag should be set if we're currently running on a
492 /// mobile device, where we may need to check for interruption of the application regularly. If you
493 /// are unsure, you should set the flag, as the performance impact of it is minimal unless there
494 /// are hundreds or thousands of simultaneous process calls running.
496 /// For example, in order to process background events in a [Tokio](https://tokio.rs/) task, you
497 /// could setup `process_events_async` like this:
499 /// # struct MyPersister {}
500 /// # impl lightning::util::persist::KVStorePersister for MyPersister {
501 /// # fn persist<W: lightning::util::ser::Writeable>(&self, key: &str, object: &W) -> lightning::io::Result<()> { Ok(()) }
503 /// # struct MyEventHandler {}
504 /// # impl MyEventHandler {
505 /// # async fn handle_event(&self, _: lightning::events::Event) {}
507 /// # #[derive(Eq, PartialEq, Clone, Hash)]
508 /// # struct MySocketDescriptor {}
509 /// # impl lightning::ln::peer_handler::SocketDescriptor for MySocketDescriptor {
510 /// # fn send_data(&mut self, _data: &[u8], _resume_read: bool) -> usize { 0 }
511 /// # fn disconnect_socket(&mut self) {}
513 /// # use std::sync::{Arc, Mutex};
514 /// # use std::sync::atomic::{AtomicBool, Ordering};
515 /// # use lightning_background_processor::{process_events_async, GossipSync};
516 /// # type MyBroadcaster = dyn lightning::chain::chaininterface::BroadcasterInterface + Send + Sync;
517 /// # type MyFeeEstimator = dyn lightning::chain::chaininterface::FeeEstimator + Send + Sync;
518 /// # type MyNodeSigner = dyn lightning::sign::NodeSigner + Send + Sync;
519 /// # type MyUtxoLookup = dyn lightning::routing::utxo::UtxoLookup + Send + Sync;
520 /// # type MyFilter = dyn lightning::chain::Filter + Send + Sync;
521 /// # type MyLogger = dyn lightning::util::logger::Logger + Send + Sync;
522 /// # type MyChainMonitor = lightning::chain::chainmonitor::ChainMonitor<lightning::sign::InMemorySigner, Arc<MyFilter>, Arc<MyBroadcaster>, Arc<MyFeeEstimator>, Arc<MyLogger>, Arc<MyPersister>>;
523 /// # type MyPeerManager = lightning::ln::peer_handler::SimpleArcPeerManager<MySocketDescriptor, MyChainMonitor, MyBroadcaster, MyFeeEstimator, MyUtxoLookup, MyLogger>;
524 /// # type MyNetworkGraph = lightning::routing::gossip::NetworkGraph<Arc<MyLogger>>;
525 /// # type MyGossipSync = lightning::routing::gossip::P2PGossipSync<Arc<MyNetworkGraph>, Arc<MyUtxoLookup>, Arc<MyLogger>>;
526 /// # type MyChannelManager = lightning::ln::channelmanager::SimpleArcChannelManager<MyChainMonitor, MyBroadcaster, MyFeeEstimator, MyLogger>;
527 /// # type MyScorer = Mutex<lightning::routing::scoring::ProbabilisticScorer<Arc<MyNetworkGraph>, Arc<MyLogger>>>;
529 /// # async fn setup_background_processing(my_persister: Arc<MyPersister>, my_event_handler: Arc<MyEventHandler>, my_chain_monitor: Arc<MyChainMonitor>, my_channel_manager: Arc<MyChannelManager>, my_gossip_sync: Arc<MyGossipSync>, my_logger: Arc<MyLogger>, my_scorer: Arc<MyScorer>, my_peer_manager: Arc<MyPeerManager>) {
530 /// let background_persister = Arc::clone(&my_persister);
531 /// let background_event_handler = Arc::clone(&my_event_handler);
532 /// let background_chain_mon = Arc::clone(&my_chain_monitor);
533 /// let background_chan_man = Arc::clone(&my_channel_manager);
534 /// let background_gossip_sync = GossipSync::p2p(Arc::clone(&my_gossip_sync));
535 /// let background_peer_man = Arc::clone(&my_peer_manager);
536 /// let background_logger = Arc::clone(&my_logger);
537 /// let background_scorer = Arc::clone(&my_scorer);
539 /// // Setup the sleeper.
540 /// let (stop_sender, stop_receiver) = tokio::sync::watch::channel(());
542 /// let sleeper = move |d| {
543 /// let mut receiver = stop_receiver.clone();
544 /// Box::pin(async move {
546 /// _ = tokio::time::sleep(d) => false,
547 /// _ = receiver.changed() => true,
552 /// let mobile_interruptable_platform = false;
554 /// let handle = tokio::spawn(async move {
555 /// process_events_async(
556 /// background_persister,
557 /// |e| background_event_handler.handle_event(e),
558 /// background_chain_mon,
559 /// background_chan_man,
560 /// background_gossip_sync,
561 /// background_peer_man,
562 /// background_logger,
563 /// Some(background_scorer),
565 /// mobile_interruptable_platform,
568 /// .expect("Failed to process events");
571 /// // Stop the background processing.
572 /// stop_sender.send(()).unwrap();
573 /// handle.await.unwrap();
576 #[cfg(feature = "futures")]
577 pub async fn process_events_async<
579 UL: 'static + Deref + Send + Sync,
580 CF: 'static + Deref + Send + Sync,
581 CW: 'static + Deref + Send + Sync,
582 T: 'static + Deref + Send + Sync,
583 ES: 'static + Deref + Send + Sync,
584 NS: 'static + Deref + Send + Sync,
585 SP: 'static + Deref + Send + Sync,
586 F: 'static + Deref + Send + Sync,
587 R: 'static + Deref + Send + Sync,
588 G: 'static + Deref<Target = NetworkGraph<L>> + Send + Sync,
589 L: 'static + Deref + Send + Sync,
590 P: 'static + Deref + Send + Sync,
591 EventHandlerFuture: core::future::Future<Output = ()>,
592 EventHandler: Fn(Event) -> EventHandlerFuture,
593 PS: 'static + Deref + Send,
594 M: 'static + Deref<Target = ChainMonitor<<SP::Target as SignerProvider>::Signer, CF, T, F, L, P>> + Send + Sync,
595 CM: 'static + Deref<Target = ChannelManager<CW, T, ES, NS, SP, F, R, L>> + Send + Sync,
596 PGS: 'static + Deref<Target = P2PGossipSync<G, UL, L>> + Send + Sync,
597 RGS: 'static + Deref<Target = RapidGossipSync<G, L>> + Send,
598 APM: APeerManager + Send + Sync,
599 PM: 'static + Deref<Target = APM> + Send + Sync,
600 S: 'static + Deref<Target = SC> + Send + Sync,
601 SC: for<'b> WriteableScore<'b>,
602 SleepFuture: core::future::Future<Output = bool> + core::marker::Unpin,
603 Sleeper: Fn(Duration) -> SleepFuture
605 persister: PS, event_handler: EventHandler, chain_monitor: M, channel_manager: CM,
606 gossip_sync: GossipSync<PGS, RGS, G, UL, L>, peer_manager: PM, logger: L, scorer: Option<S>,
607 sleeper: Sleeper, mobile_interruptable_platform: bool,
608 ) -> Result<(), lightning::io::Error>
610 UL::Target: 'static + UtxoLookup,
611 CF::Target: 'static + chain::Filter,
612 CW::Target: 'static + chain::Watch<<SP::Target as SignerProvider>::Signer>,
613 T::Target: 'static + BroadcasterInterface,
614 ES::Target: 'static + EntropySource,
615 NS::Target: 'static + NodeSigner,
616 SP::Target: 'static + SignerProvider,
617 F::Target: 'static + FeeEstimator,
618 R::Target: 'static + Router,
619 L::Target: 'static + Logger,
620 P::Target: 'static + Persist<<SP::Target as SignerProvider>::Signer>,
621 PS::Target: 'static + Persister<'a, CW, T, ES, NS, SP, F, R, L, SC>,
623 let mut should_break = false;
624 let async_event_handler = |event| {
625 let network_graph = gossip_sync.network_graph();
626 let event_handler = &event_handler;
627 let scorer = &scorer;
628 let logger = &logger;
629 let persister = &persister;
631 if let Some(network_graph) = network_graph {
632 handle_network_graph_update(network_graph, &event)
634 if let Some(ref scorer) = scorer {
635 if update_scorer(scorer, &event) {
636 log_trace!(logger, "Persisting scorer after update");
637 if let Err(e) = persister.persist_scorer(&scorer) {
638 log_error!(logger, "Error: Failed to persist scorer, check your disk and permissions {}", e)
642 event_handler(event).await;
645 define_run_body!(persister,
646 chain_monitor, chain_monitor.process_pending_events_async(async_event_handler).await,
647 channel_manager, channel_manager.process_pending_events_async(async_event_handler).await,
648 gossip_sync, peer_manager, logger, scorer, should_break, {
650 a: channel_manager.get_persistable_update_future(),
651 b: chain_monitor.get_update_future(),
652 c: sleeper(if mobile_interruptable_platform { Duration::from_millis(100) } else { Duration::from_secs(FASTEST_TIMER) }),
655 SelectorOutput::A => true,
656 SelectorOutput::B => false,
657 SelectorOutput::C(exit) => {
662 }, |t| sleeper(Duration::from_secs(t)),
663 |fut: &mut SleepFuture, _| {
664 let mut waker = dummy_waker();
665 let mut ctx = task::Context::from_waker(&mut waker);
666 match core::pin::Pin::new(fut).poll(&mut ctx) {
667 task::Poll::Ready(exit) => { should_break = exit; true },
668 task::Poll::Pending => false,
670 }, mobile_interruptable_platform)
673 #[cfg(feature = "std")]
674 impl BackgroundProcessor {
675 /// Start a background thread that takes care of responsibilities enumerated in the [top-level
678 /// The thread runs indefinitely unless the object is dropped, [`stop`] is called, or
679 /// [`Persister::persist_manager`] returns an error. In case of an error, the error is retrieved by calling
680 /// either [`join`] or [`stop`].
682 /// # Data Persistence
684 /// [`Persister::persist_manager`] is responsible for writing out the [`ChannelManager`] to disk, and/or
685 /// uploading to one or more backup services. See [`ChannelManager::write`] for writing out a
686 /// [`ChannelManager`]. See the `lightning-persister` crate for LDK's
687 /// provided implementation.
689 /// [`Persister::persist_graph`] is responsible for writing out the [`NetworkGraph`] to disk, if
690 /// [`GossipSync`] is supplied. See [`NetworkGraph::write`] for writing out a [`NetworkGraph`].
691 /// See the `lightning-persister` crate for LDK's provided implementation.
693 /// Typically, users should either implement [`Persister::persist_manager`] to never return an
694 /// error or call [`join`] and handle any error that may arise. For the latter case,
695 /// `BackgroundProcessor` must be restarted by calling `start` again after handling the error.
699 /// `event_handler` is responsible for handling events that users should be notified of (e.g.,
700 /// payment failed). [`BackgroundProcessor`] may decorate the given [`EventHandler`] with common
701 /// functionality implemented by other handlers.
702 /// * [`P2PGossipSync`] if given will update the [`NetworkGraph`] based on payment failures.
704 /// # Rapid Gossip Sync
706 /// If rapid gossip sync is meant to run at startup, pass [`RapidGossipSync`] via `gossip_sync`
707 /// to indicate that the [`BackgroundProcessor`] should not prune the [`NetworkGraph`] instance
708 /// until the [`RapidGossipSync`] instance completes its first sync.
710 /// [top-level documentation]: BackgroundProcessor
711 /// [`join`]: Self::join
712 /// [`stop`]: Self::stop
713 /// [`ChannelManager`]: lightning::ln::channelmanager::ChannelManager
714 /// [`ChannelManager::write`]: lightning::ln::channelmanager::ChannelManager#impl-Writeable
715 /// [`Persister::persist_manager`]: lightning::util::persist::Persister::persist_manager
716 /// [`Persister::persist_graph`]: lightning::util::persist::Persister::persist_graph
717 /// [`NetworkGraph`]: lightning::routing::gossip::NetworkGraph
718 /// [`NetworkGraph::write`]: lightning::routing::gossip::NetworkGraph#impl-Writeable
721 UL: 'static + Deref + Send + Sync,
722 CF: 'static + Deref + Send + Sync,
723 CW: 'static + Deref + Send + Sync,
724 T: 'static + Deref + Send + Sync,
725 ES: 'static + Deref + Send + Sync,
726 NS: 'static + Deref + Send + Sync,
727 SP: 'static + Deref + Send + Sync,
728 F: 'static + Deref + Send + Sync,
729 R: 'static + Deref + Send + Sync,
730 G: 'static + Deref<Target = NetworkGraph<L>> + Send + Sync,
731 L: 'static + Deref + Send + Sync,
732 P: 'static + Deref + Send + Sync,
733 EH: 'static + EventHandler + Send,
734 PS: 'static + Deref + Send,
735 M: 'static + Deref<Target = ChainMonitor<<SP::Target as SignerProvider>::Signer, CF, T, F, L, P>> + Send + Sync,
736 CM: 'static + Deref<Target = ChannelManager<CW, T, ES, NS, SP, F, R, L>> + Send + Sync,
737 PGS: 'static + Deref<Target = P2PGossipSync<G, UL, L>> + Send + Sync,
738 RGS: 'static + Deref<Target = RapidGossipSync<G, L>> + Send,
739 APM: APeerManager + Send + Sync,
740 PM: 'static + Deref<Target = APM> + Send + Sync,
741 S: 'static + Deref<Target = SC> + Send + Sync,
742 SC: for <'b> WriteableScore<'b>,
744 persister: PS, event_handler: EH, chain_monitor: M, channel_manager: CM,
745 gossip_sync: GossipSync<PGS, RGS, G, UL, L>, peer_manager: PM, logger: L, scorer: Option<S>,
748 UL::Target: 'static + UtxoLookup,
749 CF::Target: 'static + chain::Filter,
750 CW::Target: 'static + chain::Watch<<SP::Target as SignerProvider>::Signer>,
751 T::Target: 'static + BroadcasterInterface,
752 ES::Target: 'static + EntropySource,
753 NS::Target: 'static + NodeSigner,
754 SP::Target: 'static + SignerProvider,
755 F::Target: 'static + FeeEstimator,
756 R::Target: 'static + Router,
757 L::Target: 'static + Logger,
758 P::Target: 'static + Persist<<SP::Target as SignerProvider>::Signer>,
759 PS::Target: 'static + Persister<'a, CW, T, ES, NS, SP, F, R, L, SC>,
761 let stop_thread = Arc::new(AtomicBool::new(false));
762 let stop_thread_clone = stop_thread.clone();
763 let handle = thread::spawn(move || -> Result<(), std::io::Error> {
764 let event_handler = |event| {
765 let network_graph = gossip_sync.network_graph();
766 if let Some(network_graph) = network_graph {
767 handle_network_graph_update(network_graph, &event)
769 if let Some(ref scorer) = scorer {
770 if update_scorer(scorer, &event) {
771 log_trace!(logger, "Persisting scorer after update");
772 if let Err(e) = persister.persist_scorer(&scorer) {
773 log_error!(logger, "Error: Failed to persist scorer, check your disk and permissions {}", e)
777 event_handler.handle_event(event);
779 define_run_body!(persister, chain_monitor, chain_monitor.process_pending_events(&event_handler),
780 channel_manager, channel_manager.process_pending_events(&event_handler),
781 gossip_sync, peer_manager, logger, scorer, stop_thread.load(Ordering::Acquire),
782 Sleeper::from_two_futures(
783 channel_manager.get_persistable_update_future(),
784 chain_monitor.get_update_future()
785 ).wait_timeout(Duration::from_millis(100)),
786 |_| Instant::now(), |time: &Instant, dur| time.elapsed().as_secs() > dur, false)
788 Self { stop_thread: stop_thread_clone, thread_handle: Some(handle) }
791 /// Join `BackgroundProcessor`'s thread, returning any error that occurred while persisting
792 /// [`ChannelManager`].
796 /// This function panics if the background thread has panicked such as while persisting or
799 /// [`ChannelManager`]: lightning::ln::channelmanager::ChannelManager
800 pub fn join(mut self) -> Result<(), std::io::Error> {
801 assert!(self.thread_handle.is_some());
805 /// Stop `BackgroundProcessor`'s thread, returning any error that occurred while persisting
806 /// [`ChannelManager`].
810 /// This function panics if the background thread has panicked such as while persisting or
813 /// [`ChannelManager`]: lightning::ln::channelmanager::ChannelManager
814 pub fn stop(mut self) -> Result<(), std::io::Error> {
815 assert!(self.thread_handle.is_some());
816 self.stop_and_join_thread()
819 fn stop_and_join_thread(&mut self) -> Result<(), std::io::Error> {
820 self.stop_thread.store(true, Ordering::Release);
824 fn join_thread(&mut self) -> Result<(), std::io::Error> {
825 match self.thread_handle.take() {
826 Some(handle) => handle.join().unwrap(),
832 #[cfg(feature = "std")]
833 impl Drop for BackgroundProcessor {
835 self.stop_and_join_thread().unwrap();
839 #[cfg(all(feature = "std", test))]
841 use bitcoin::blockdata::constants::genesis_block;
842 use bitcoin::blockdata::locktime::PackedLockTime;
843 use bitcoin::blockdata::transaction::{Transaction, TxOut};
844 use bitcoin::network::constants::Network;
845 use bitcoin::secp256k1::{SecretKey, PublicKey, Secp256k1};
846 use lightning::chain::{BestBlock, Confirm, chainmonitor};
847 use lightning::chain::channelmonitor::ANTI_REORG_DELAY;
848 use lightning::sign::{InMemorySigner, KeysManager};
849 use lightning::chain::transaction::OutPoint;
850 use lightning::events::{Event, PathFailure, MessageSendEventsProvider, MessageSendEvent};
851 use lightning::{get_event_msg, get_event};
852 use lightning::ln::PaymentHash;
853 use lightning::ln::channelmanager;
854 use lightning::ln::channelmanager::{BREAKDOWN_TIMEOUT, ChainParameters, MIN_CLTV_EXPIRY_DELTA, PaymentId};
855 use lightning::ln::features::{ChannelFeatures, NodeFeatures};
856 use lightning::ln::functional_test_utils::*;
857 use lightning::ln::msgs::{ChannelMessageHandler, Init};
858 use lightning::ln::peer_handler::{PeerManager, MessageHandler, SocketDescriptor, IgnoringMessageHandler};
859 use lightning::routing::gossip::{NetworkGraph, NodeId, P2PGossipSync};
860 use lightning::routing::router::{DefaultRouter, Path, RouteHop};
861 use lightning::routing::scoring::{ChannelUsage, Score};
862 use lightning::util::config::UserConfig;
863 use lightning::util::ser::Writeable;
864 use lightning::util::test_utils;
865 use lightning::util::persist::KVStorePersister;
866 use lightning_persister::FilesystemPersister;
867 use std::collections::VecDeque;
869 use std::path::PathBuf;
870 use std::sync::{Arc, Mutex};
871 use std::sync::mpsc::SyncSender;
872 use std::time::Duration;
873 use lightning_rapid_gossip_sync::RapidGossipSync;
874 use super::{BackgroundProcessor, GossipSync, FRESHNESS_TIMER};
876 const EVENT_DEADLINE: u64 = 5 * FRESHNESS_TIMER;
878 #[derive(Clone, Hash, PartialEq, Eq)]
879 struct TestDescriptor{}
880 impl SocketDescriptor for TestDescriptor {
881 fn send_data(&mut self, _data: &[u8], _resume_read: bool) -> usize {
885 fn disconnect_socket(&mut self) {}
888 type ChannelManager = channelmanager::ChannelManager<Arc<ChainMonitor>, Arc<test_utils::TestBroadcaster>, Arc<KeysManager>, Arc<KeysManager>, Arc<KeysManager>, Arc<test_utils::TestFeeEstimator>, Arc<DefaultRouter<Arc<NetworkGraph<Arc<test_utils::TestLogger>>>, Arc<test_utils::TestLogger>, Arc<Mutex<TestScorer>>, (), TestScorer>>, Arc<test_utils::TestLogger>>;
890 type ChainMonitor = chainmonitor::ChainMonitor<InMemorySigner, Arc<test_utils::TestChainSource>, Arc<test_utils::TestBroadcaster>, Arc<test_utils::TestFeeEstimator>, Arc<test_utils::TestLogger>, Arc<FilesystemPersister>>;
892 type PGS = Arc<P2PGossipSync<Arc<NetworkGraph<Arc<test_utils::TestLogger>>>, Arc<test_utils::TestChainSource>, Arc<test_utils::TestLogger>>>;
893 type RGS = Arc<RapidGossipSync<Arc<NetworkGraph<Arc<test_utils::TestLogger>>>, Arc<test_utils::TestLogger>>>;
896 node: Arc<ChannelManager>,
897 p2p_gossip_sync: PGS,
898 rapid_gossip_sync: RGS,
899 peer_manager: Arc<PeerManager<TestDescriptor, Arc<test_utils::TestChannelMessageHandler>, Arc<test_utils::TestRoutingMessageHandler>, IgnoringMessageHandler, Arc<test_utils::TestLogger>, IgnoringMessageHandler, Arc<KeysManager>>>,
900 chain_monitor: Arc<ChainMonitor>,
901 persister: Arc<FilesystemPersister>,
902 tx_broadcaster: Arc<test_utils::TestBroadcaster>,
903 network_graph: Arc<NetworkGraph<Arc<test_utils::TestLogger>>>,
904 logger: Arc<test_utils::TestLogger>,
905 best_block: BestBlock,
906 scorer: Arc<Mutex<TestScorer>>,
910 fn p2p_gossip_sync(&self) -> GossipSync<PGS, RGS, Arc<NetworkGraph<Arc<test_utils::TestLogger>>>, Arc<test_utils::TestChainSource>, Arc<test_utils::TestLogger>> {
911 GossipSync::P2P(self.p2p_gossip_sync.clone())
914 fn rapid_gossip_sync(&self) -> GossipSync<PGS, RGS, Arc<NetworkGraph<Arc<test_utils::TestLogger>>>, Arc<test_utils::TestChainSource>, Arc<test_utils::TestLogger>> {
915 GossipSync::Rapid(self.rapid_gossip_sync.clone())
918 fn no_gossip_sync(&self) -> GossipSync<PGS, RGS, Arc<NetworkGraph<Arc<test_utils::TestLogger>>>, Arc<test_utils::TestChainSource>, Arc<test_utils::TestLogger>> {
925 let data_dir = self.persister.get_data_dir();
926 match fs::remove_dir_all(data_dir.clone()) {
927 Err(e) => println!("Failed to remove test persister directory {}: {}", data_dir, e),
934 graph_error: Option<(std::io::ErrorKind, &'static str)>,
935 graph_persistence_notifier: Option<SyncSender<()>>,
936 manager_error: Option<(std::io::ErrorKind, &'static str)>,
937 scorer_error: Option<(std::io::ErrorKind, &'static str)>,
938 filesystem_persister: FilesystemPersister,
942 fn new(data_dir: String) -> Self {
943 let filesystem_persister = FilesystemPersister::new(data_dir);
944 Self { graph_error: None, graph_persistence_notifier: None, manager_error: None, scorer_error: None, filesystem_persister }
947 fn with_graph_error(self, error: std::io::ErrorKind, message: &'static str) -> Self {
948 Self { graph_error: Some((error, message)), ..self }
951 fn with_graph_persistence_notifier(self, sender: SyncSender<()>) -> Self {
952 Self { graph_persistence_notifier: Some(sender), ..self }
955 fn with_manager_error(self, error: std::io::ErrorKind, message: &'static str) -> Self {
956 Self { manager_error: Some((error, message)), ..self }
959 fn with_scorer_error(self, error: std::io::ErrorKind, message: &'static str) -> Self {
960 Self { scorer_error: Some((error, message)), ..self }
964 impl KVStorePersister for Persister {
965 fn persist<W: Writeable>(&self, key: &str, object: &W) -> std::io::Result<()> {
966 if key == "manager" {
967 if let Some((error, message)) = self.manager_error {
968 return Err(std::io::Error::new(error, message))
972 if key == "network_graph" {
973 if let Some(sender) = &self.graph_persistence_notifier {
974 match sender.send(()) {
976 Err(std::sync::mpsc::SendError(())) => println!("Persister failed to notify as receiver went away."),
980 if let Some((error, message)) = self.graph_error {
981 return Err(std::io::Error::new(error, message))
986 if let Some((error, message)) = self.scorer_error {
987 return Err(std::io::Error::new(error, message))
991 self.filesystem_persister.persist(key, object)
996 event_expectations: Option<VecDeque<TestResult>>,
1001 PaymentFailure { path: Path, short_channel_id: u64 },
1002 PaymentSuccess { path: Path },
1003 ProbeFailure { path: Path },
1004 ProbeSuccess { path: Path },
1009 Self { event_expectations: None }
1012 fn expect(&mut self, expectation: TestResult) {
1013 self.event_expectations.get_or_insert_with(VecDeque::new).push_back(expectation);
1017 impl lightning::util::ser::Writeable for TestScorer {
1018 fn write<W: lightning::util::ser::Writer>(&self, _: &mut W) -> Result<(), lightning::io::Error> { Ok(()) }
1021 impl Score for TestScorer {
1022 type ScoreParams = ();
1023 fn channel_penalty_msat(
1024 &self, _short_channel_id: u64, _source: &NodeId, _target: &NodeId, _usage: ChannelUsage, _score_params: &Self::ScoreParams
1025 ) -> u64 { unimplemented!(); }
1027 fn payment_path_failed(&mut self, actual_path: &Path, actual_short_channel_id: u64) {
1028 if let Some(expectations) = &mut self.event_expectations {
1029 match expectations.pop_front().unwrap() {
1030 TestResult::PaymentFailure { path, short_channel_id } => {
1031 assert_eq!(actual_path, &path);
1032 assert_eq!(actual_short_channel_id, short_channel_id);
1034 TestResult::PaymentSuccess { path } => {
1035 panic!("Unexpected successful payment path: {:?}", path)
1037 TestResult::ProbeFailure { path } => {
1038 panic!("Unexpected probe failure: {:?}", path)
1040 TestResult::ProbeSuccess { path } => {
1041 panic!("Unexpected probe success: {:?}", path)
1047 fn payment_path_successful(&mut self, actual_path: &Path) {
1048 if let Some(expectations) = &mut self.event_expectations {
1049 match expectations.pop_front().unwrap() {
1050 TestResult::PaymentFailure { path, .. } => {
1051 panic!("Unexpected payment path failure: {:?}", path)
1053 TestResult::PaymentSuccess { path } => {
1054 assert_eq!(actual_path, &path);
1056 TestResult::ProbeFailure { path } => {
1057 panic!("Unexpected probe failure: {:?}", path)
1059 TestResult::ProbeSuccess { path } => {
1060 panic!("Unexpected probe success: {:?}", path)
1066 fn probe_failed(&mut self, actual_path: &Path, _: u64) {
1067 if let Some(expectations) = &mut self.event_expectations {
1068 match expectations.pop_front().unwrap() {
1069 TestResult::PaymentFailure { path, .. } => {
1070 panic!("Unexpected payment path failure: {:?}", path)
1072 TestResult::PaymentSuccess { path } => {
1073 panic!("Unexpected payment path success: {:?}", path)
1075 TestResult::ProbeFailure { path } => {
1076 assert_eq!(actual_path, &path);
1078 TestResult::ProbeSuccess { path } => {
1079 panic!("Unexpected probe success: {:?}", path)
1084 fn probe_successful(&mut self, actual_path: &Path) {
1085 if let Some(expectations) = &mut self.event_expectations {
1086 match expectations.pop_front().unwrap() {
1087 TestResult::PaymentFailure { path, .. } => {
1088 panic!("Unexpected payment path failure: {:?}", path)
1090 TestResult::PaymentSuccess { path } => {
1091 panic!("Unexpected payment path success: {:?}", path)
1093 TestResult::ProbeFailure { path } => {
1094 panic!("Unexpected probe failure: {:?}", path)
1096 TestResult::ProbeSuccess { path } => {
1097 assert_eq!(actual_path, &path);
1104 impl Drop for TestScorer {
1105 fn drop(&mut self) {
1106 if std::thread::panicking() {
1110 if let Some(event_expectations) = &self.event_expectations {
1111 if !event_expectations.is_empty() {
1112 panic!("Unsatisfied event expectations: {:?}", event_expectations);
1118 fn get_full_filepath(filepath: String, filename: String) -> String {
1119 let mut path = PathBuf::from(filepath);
1120 path.push(filename);
1121 path.to_str().unwrap().to_string()
1124 fn create_nodes(num_nodes: usize, persist_dir: &str) -> (String, Vec<Node>) {
1125 let persist_temp_path = env::temp_dir().join(persist_dir);
1126 let persist_dir = persist_temp_path.to_string_lossy().to_string();
1127 let network = Network::Bitcoin;
1128 let mut nodes = Vec::new();
1129 for i in 0..num_nodes {
1130 let tx_broadcaster = Arc::new(test_utils::TestBroadcaster::new(network));
1131 let fee_estimator = Arc::new(test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) });
1132 let logger = Arc::new(test_utils::TestLogger::with_id(format!("node {}", i)));
1133 let genesis_block = genesis_block(network);
1134 let network_graph = Arc::new(NetworkGraph::new(network, logger.clone()));
1135 let scorer = Arc::new(Mutex::new(TestScorer::new()));
1136 let seed = [i as u8; 32];
1137 let router = Arc::new(DefaultRouter::new(network_graph.clone(), logger.clone(), seed, scorer.clone(), ()));
1138 let chain_source = Arc::new(test_utils::TestChainSource::new(Network::Bitcoin));
1139 let persister = Arc::new(FilesystemPersister::new(format!("{}_persister_{}", &persist_dir, i)));
1140 let now = Duration::from_secs(genesis_block.header.time as u64);
1141 let keys_manager = Arc::new(KeysManager::new(&seed, now.as_secs(), now.subsec_nanos()));
1142 let chain_monitor = Arc::new(chainmonitor::ChainMonitor::new(Some(chain_source.clone()), tx_broadcaster.clone(), logger.clone(), fee_estimator.clone(), persister.clone()));
1143 let best_block = BestBlock::from_network(network);
1144 let params = ChainParameters { network, best_block };
1145 let manager = Arc::new(ChannelManager::new(fee_estimator.clone(), chain_monitor.clone(), tx_broadcaster.clone(), router.clone(), logger.clone(), keys_manager.clone(), keys_manager.clone(), keys_manager.clone(), UserConfig::default(), params));
1146 let p2p_gossip_sync = Arc::new(P2PGossipSync::new(network_graph.clone(), Some(chain_source.clone()), logger.clone()));
1147 let rapid_gossip_sync = Arc::new(RapidGossipSync::new(network_graph.clone(), logger.clone()));
1148 let msg_handler = MessageHandler {
1149 chan_handler: Arc::new(test_utils::TestChannelMessageHandler::new()),
1150 route_handler: Arc::new(test_utils::TestRoutingMessageHandler::new()),
1151 onion_message_handler: IgnoringMessageHandler{}, custom_message_handler: IgnoringMessageHandler{}
1153 let peer_manager = Arc::new(PeerManager::new(msg_handler, 0, &seed, logger.clone(), keys_manager.clone()));
1154 let node = Node { node: manager, p2p_gossip_sync, rapid_gossip_sync, peer_manager, chain_monitor, persister, tx_broadcaster, network_graph, logger, best_block, scorer };
1158 for i in 0..num_nodes {
1159 for j in (i+1)..num_nodes {
1160 nodes[i].node.peer_connected(&nodes[j].node.get_our_node_id(), &Init { features: nodes[j].node.init_features(), remote_network_address: None }, true).unwrap();
1161 nodes[j].node.peer_connected(&nodes[i].node.get_our_node_id(), &Init { features: nodes[i].node.init_features(), remote_network_address: None }, false).unwrap();
1165 (persist_dir, nodes)
1168 macro_rules! open_channel {
1169 ($node_a: expr, $node_b: expr, $channel_value: expr) => {{
1170 begin_open_channel!($node_a, $node_b, $channel_value);
1171 let events = $node_a.node.get_and_clear_pending_events();
1172 assert_eq!(events.len(), 1);
1173 let (temporary_channel_id, tx) = handle_funding_generation_ready!(events[0], $channel_value);
1174 $node_a.node.funding_transaction_generated(&temporary_channel_id, &$node_b.node.get_our_node_id(), tx.clone()).unwrap();
1175 $node_b.node.handle_funding_created(&$node_a.node.get_our_node_id(), &get_event_msg!($node_a, MessageSendEvent::SendFundingCreated, $node_b.node.get_our_node_id()));
1176 get_event!($node_b, Event::ChannelPending);
1177 $node_a.node.handle_funding_signed(&$node_b.node.get_our_node_id(), &get_event_msg!($node_b, MessageSendEvent::SendFundingSigned, $node_a.node.get_our_node_id()));
1178 get_event!($node_a, Event::ChannelPending);
1183 macro_rules! begin_open_channel {
1184 ($node_a: expr, $node_b: expr, $channel_value: expr) => {{
1185 $node_a.node.create_channel($node_b.node.get_our_node_id(), $channel_value, 100, 42, None).unwrap();
1186 $node_b.node.handle_open_channel(&$node_a.node.get_our_node_id(), &get_event_msg!($node_a, MessageSendEvent::SendOpenChannel, $node_b.node.get_our_node_id()));
1187 $node_a.node.handle_accept_channel(&$node_b.node.get_our_node_id(), &get_event_msg!($node_b, MessageSendEvent::SendAcceptChannel, $node_a.node.get_our_node_id()));
1191 macro_rules! handle_funding_generation_ready {
1192 ($event: expr, $channel_value: expr) => {{
1194 Event::FundingGenerationReady { temporary_channel_id, channel_value_satoshis, ref output_script, user_channel_id, .. } => {
1195 assert_eq!(channel_value_satoshis, $channel_value);
1196 assert_eq!(user_channel_id, 42);
1198 let tx = Transaction { version: 1 as i32, lock_time: PackedLockTime(0), input: Vec::new(), output: vec![TxOut {
1199 value: channel_value_satoshis, script_pubkey: output_script.clone(),
1201 (temporary_channel_id, tx)
1203 _ => panic!("Unexpected event"),
1208 fn confirm_transaction_depth(node: &mut Node, tx: &Transaction, depth: u32) {
1209 for i in 1..=depth {
1210 let prev_blockhash = node.best_block.block_hash();
1211 let height = node.best_block.height() + 1;
1212 let header = create_dummy_header(prev_blockhash, height);
1213 let txdata = vec![(0, tx)];
1214 node.best_block = BestBlock::new(header.block_hash(), height);
1217 node.node.transactions_confirmed(&header, &txdata, height);
1218 node.chain_monitor.transactions_confirmed(&header, &txdata, height);
1220 x if x == depth => {
1221 node.node.best_block_updated(&header, height);
1222 node.chain_monitor.best_block_updated(&header, height);
1228 fn confirm_transaction(node: &mut Node, tx: &Transaction) {
1229 confirm_transaction_depth(node, tx, ANTI_REORG_DELAY);
1233 fn test_background_processor() {
1234 // Test that when a new channel is created, the ChannelManager needs to be re-persisted with
1235 // updates. Also test that when new updates are available, the manager signals that it needs
1236 // re-persistence and is successfully re-persisted.
1237 let (persist_dir, nodes) = create_nodes(2, "test_background_processor");
1239 // Go through the channel creation process so that each node has something to persist. Since
1240 // open_channel consumes events, it must complete before starting BackgroundProcessor to
1241 // avoid a race with processing events.
1242 let tx = open_channel!(nodes[0], nodes[1], 100000);
1244 // Initiate the background processors to watch each node.
1245 let data_dir = nodes[0].persister.get_data_dir();
1246 let persister = Arc::new(Persister::new(data_dir));
1247 let event_handler = |_: _| {};
1248 let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].p2p_gossip_sync(), nodes[0].peer_manager.clone(), nodes[0].logger.clone(), Some(nodes[0].scorer.clone()));
1250 macro_rules! check_persisted_data {
1251 ($node: expr, $filepath: expr) => {
1252 let mut expected_bytes = Vec::new();
1254 expected_bytes.clear();
1255 match $node.write(&mut expected_bytes) {
1257 match std::fs::read($filepath) {
1259 if bytes == expected_bytes {
1268 Err(e) => panic!("Unexpected error: {}", e)
1274 // Check that the initial channel manager data is persisted as expected.
1275 let filepath = get_full_filepath(format!("{}_persister_0", &persist_dir), "manager".to_string());
1276 check_persisted_data!(nodes[0].node, filepath.clone());
1279 if !nodes[0].node.get_persistence_condvar_value() { break }
1282 // Force-close the channel.
1283 nodes[0].node.force_close_broadcasting_latest_txn(&OutPoint { txid: tx.txid(), index: 0 }.to_channel_id(), &nodes[1].node.get_our_node_id()).unwrap();
1285 // Check that the force-close updates are persisted.
1286 check_persisted_data!(nodes[0].node, filepath.clone());
1288 if !nodes[0].node.get_persistence_condvar_value() { break }
1291 // Check network graph is persisted
1292 let filepath = get_full_filepath(format!("{}_persister_0", &persist_dir), "network_graph".to_string());
1293 check_persisted_data!(nodes[0].network_graph, filepath.clone());
1295 // Check scorer is persisted
1296 let filepath = get_full_filepath(format!("{}_persister_0", &persist_dir), "scorer".to_string());
1297 check_persisted_data!(nodes[0].scorer, filepath.clone());
1299 if !std::thread::panicking() {
1300 bg_processor.stop().unwrap();
1305 fn test_timer_tick_called() {
1306 // Test that `ChannelManager::timer_tick_occurred` is called every `FRESHNESS_TIMER`,
1307 // `ChainMonitor::rebroadcast_pending_claims` is called every `REBROADCAST_TIMER`, and
1308 // `PeerManager::timer_tick_occurred` every `PING_TIMER`.
1309 let (_, nodes) = create_nodes(1, "test_timer_tick_called");
1310 let data_dir = nodes[0].persister.get_data_dir();
1311 let persister = Arc::new(Persister::new(data_dir));
1312 let event_handler = |_: _| {};
1313 let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].no_gossip_sync(), nodes[0].peer_manager.clone(), nodes[0].logger.clone(), Some(nodes[0].scorer.clone()));
1315 let log_entries = nodes[0].logger.lines.lock().unwrap();
1316 let desired_log_1 = "Calling ChannelManager's timer_tick_occurred".to_string();
1317 let desired_log_2 = "Calling PeerManager's timer_tick_occurred".to_string();
1318 let desired_log_3 = "Rebroadcasting monitor's pending claims".to_string();
1319 if log_entries.get(&("lightning_background_processor".to_string(), desired_log_1)).is_some() &&
1320 log_entries.get(&("lightning_background_processor".to_string(), desired_log_2)).is_some() &&
1321 log_entries.get(&("lightning_background_processor".to_string(), desired_log_3)).is_some() {
1326 if !std::thread::panicking() {
1327 bg_processor.stop().unwrap();
1332 fn test_channel_manager_persist_error() {
1333 // Test that if we encounter an error during manager persistence, the thread panics.
1334 let (_, nodes) = create_nodes(2, "test_persist_error");
1335 open_channel!(nodes[0], nodes[1], 100000);
1337 let data_dir = nodes[0].persister.get_data_dir();
1338 let persister = Arc::new(Persister::new(data_dir).with_manager_error(std::io::ErrorKind::Other, "test"));
1339 let event_handler = |_: _| {};
1340 let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].no_gossip_sync(), nodes[0].peer_manager.clone(), nodes[0].logger.clone(), Some(nodes[0].scorer.clone()));
1341 match bg_processor.join() {
1342 Ok(_) => panic!("Expected error persisting manager"),
1344 assert_eq!(e.kind(), std::io::ErrorKind::Other);
1345 assert_eq!(e.get_ref().unwrap().to_string(), "test");
1351 #[cfg(feature = "futures")]
1352 async fn test_channel_manager_persist_error_async() {
1353 // Test that if we encounter an error during manager persistence, the thread panics.
1354 let (_, nodes) = create_nodes(2, "test_persist_error_sync");
1355 open_channel!(nodes[0], nodes[1], 100000);
1357 let data_dir = nodes[0].persister.get_data_dir();
1358 let persister = Arc::new(Persister::new(data_dir).with_manager_error(std::io::ErrorKind::Other, "test"));
1360 let bp_future = super::process_events_async(
1361 persister, |_: _| {async {}}, nodes[0].chain_monitor.clone(), nodes[0].node.clone(),
1362 nodes[0].rapid_gossip_sync(), nodes[0].peer_manager.clone(), nodes[0].logger.clone(),
1363 Some(nodes[0].scorer.clone()), move |dur: Duration| {
1364 Box::pin(async move {
1365 tokio::time::sleep(dur).await;
1370 match bp_future.await {
1371 Ok(_) => panic!("Expected error persisting manager"),
1373 assert_eq!(e.kind(), std::io::ErrorKind::Other);
1374 assert_eq!(e.get_ref().unwrap().to_string(), "test");
1380 fn test_network_graph_persist_error() {
1381 // Test that if we encounter an error during network graph persistence, an error gets returned.
1382 let (_, nodes) = create_nodes(2, "test_persist_network_graph_error");
1383 let data_dir = nodes[0].persister.get_data_dir();
1384 let persister = Arc::new(Persister::new(data_dir).with_graph_error(std::io::ErrorKind::Other, "test"));
1385 let event_handler = |_: _| {};
1386 let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].p2p_gossip_sync(), nodes[0].peer_manager.clone(), nodes[0].logger.clone(), Some(nodes[0].scorer.clone()));
1388 match bg_processor.stop() {
1389 Ok(_) => panic!("Expected error persisting network graph"),
1391 assert_eq!(e.kind(), std::io::ErrorKind::Other);
1392 assert_eq!(e.get_ref().unwrap().to_string(), "test");
1398 fn test_scorer_persist_error() {
1399 // Test that if we encounter an error during scorer persistence, an error gets returned.
1400 let (_, nodes) = create_nodes(2, "test_persist_scorer_error");
1401 let data_dir = nodes[0].persister.get_data_dir();
1402 let persister = Arc::new(Persister::new(data_dir).with_scorer_error(std::io::ErrorKind::Other, "test"));
1403 let event_handler = |_: _| {};
1404 let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].no_gossip_sync(), nodes[0].peer_manager.clone(), nodes[0].logger.clone(), Some(nodes[0].scorer.clone()));
1406 match bg_processor.stop() {
1407 Ok(_) => panic!("Expected error persisting scorer"),
1409 assert_eq!(e.kind(), std::io::ErrorKind::Other);
1410 assert_eq!(e.get_ref().unwrap().to_string(), "test");
1416 fn test_background_event_handling() {
1417 let (_, mut nodes) = create_nodes(2, "test_background_event_handling");
1418 let channel_value = 100000;
1419 let data_dir = nodes[0].persister.get_data_dir();
1420 let persister = Arc::new(Persister::new(data_dir.clone()));
1422 // Set up a background event handler for FundingGenerationReady events.
1423 let (funding_generation_send, funding_generation_recv) = std::sync::mpsc::sync_channel(1);
1424 let (channel_pending_send, channel_pending_recv) = std::sync::mpsc::sync_channel(1);
1425 let event_handler = move |event: Event| match event {
1426 Event::FundingGenerationReady { .. } => funding_generation_send.send(handle_funding_generation_ready!(event, channel_value)).unwrap(),
1427 Event::ChannelPending { .. } => channel_pending_send.send(()).unwrap(),
1428 Event::ChannelReady { .. } => {},
1429 _ => panic!("Unexpected event: {:?}", event),
1432 let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].no_gossip_sync(), nodes[0].peer_manager.clone(), nodes[0].logger.clone(), Some(nodes[0].scorer.clone()));
1434 // Open a channel and check that the FundingGenerationReady event was handled.
1435 begin_open_channel!(nodes[0], nodes[1], channel_value);
1436 let (temporary_channel_id, funding_tx) = funding_generation_recv
1437 .recv_timeout(Duration::from_secs(EVENT_DEADLINE))
1438 .expect("FundingGenerationReady not handled within deadline");
1439 nodes[0].node.funding_transaction_generated(&temporary_channel_id, &nodes[1].node.get_our_node_id(), funding_tx.clone()).unwrap();
1440 nodes[1].node.handle_funding_created(&nodes[0].node.get_our_node_id(), &get_event_msg!(nodes[0], MessageSendEvent::SendFundingCreated, nodes[1].node.get_our_node_id()));
1441 get_event!(nodes[1], Event::ChannelPending);
1442 nodes[0].node.handle_funding_signed(&nodes[1].node.get_our_node_id(), &get_event_msg!(nodes[1], MessageSendEvent::SendFundingSigned, nodes[0].node.get_our_node_id()));
1443 let _ = channel_pending_recv.recv_timeout(Duration::from_secs(EVENT_DEADLINE))
1444 .expect("ChannelPending not handled within deadline");
1446 // Confirm the funding transaction.
1447 confirm_transaction(&mut nodes[0], &funding_tx);
1448 let as_funding = get_event_msg!(nodes[0], MessageSendEvent::SendChannelReady, nodes[1].node.get_our_node_id());
1449 confirm_transaction(&mut nodes[1], &funding_tx);
1450 let bs_funding = get_event_msg!(nodes[1], MessageSendEvent::SendChannelReady, nodes[0].node.get_our_node_id());
1451 nodes[0].node.handle_channel_ready(&nodes[1].node.get_our_node_id(), &bs_funding);
1452 let _as_channel_update = get_event_msg!(nodes[0], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
1453 nodes[1].node.handle_channel_ready(&nodes[0].node.get_our_node_id(), &as_funding);
1454 let _bs_channel_update = get_event_msg!(nodes[1], MessageSendEvent::SendChannelUpdate, nodes[0].node.get_our_node_id());
1456 if !std::thread::panicking() {
1457 bg_processor.stop().unwrap();
1460 // Set up a background event handler for SpendableOutputs events.
1461 let (sender, receiver) = std::sync::mpsc::sync_channel(1);
1462 let event_handler = move |event: Event| match event {
1463 Event::SpendableOutputs { .. } => sender.send(event).unwrap(),
1464 Event::ChannelReady { .. } => {},
1465 Event::ChannelClosed { .. } => {},
1466 _ => panic!("Unexpected event: {:?}", event),
1468 let persister = Arc::new(Persister::new(data_dir));
1469 let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].no_gossip_sync(), nodes[0].peer_manager.clone(), nodes[0].logger.clone(), Some(nodes[0].scorer.clone()));
1471 // Force close the channel and check that the SpendableOutputs event was handled.
1472 nodes[0].node.force_close_broadcasting_latest_txn(&nodes[0].node.list_channels()[0].channel_id, &nodes[1].node.get_our_node_id()).unwrap();
1473 let commitment_tx = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().pop().unwrap();
1474 confirm_transaction_depth(&mut nodes[0], &commitment_tx, BREAKDOWN_TIMEOUT as u32);
1476 let event = receiver
1477 .recv_timeout(Duration::from_secs(EVENT_DEADLINE))
1478 .expect("Events not handled within deadline");
1480 Event::SpendableOutputs { .. } => {},
1481 _ => panic!("Unexpected event: {:?}", event),
1484 if !std::thread::panicking() {
1485 bg_processor.stop().unwrap();
1490 fn test_scorer_persistence() {
1491 let (_, nodes) = create_nodes(2, "test_scorer_persistence");
1492 let data_dir = nodes[0].persister.get_data_dir();
1493 let persister = Arc::new(Persister::new(data_dir));
1494 let event_handler = |_: _| {};
1495 let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].no_gossip_sync(), nodes[0].peer_manager.clone(), nodes[0].logger.clone(), Some(nodes[0].scorer.clone()));
1498 let log_entries = nodes[0].logger.lines.lock().unwrap();
1499 let expected_log = "Persisting scorer".to_string();
1500 if log_entries.get(&("lightning_background_processor".to_string(), expected_log)).is_some() {
1505 if !std::thread::panicking() {
1506 bg_processor.stop().unwrap();
1510 macro_rules! do_test_not_pruning_network_graph_until_graph_sync_completion {
1511 ($nodes: expr, $receive: expr, $sleep: expr) => {
1512 let features = ChannelFeatures::empty();
1513 $nodes[0].network_graph.add_channel_from_partial_announcement(
1514 42, 53, features, $nodes[0].node.get_our_node_id(), $nodes[1].node.get_our_node_id()
1515 ).expect("Failed to update channel from partial announcement");
1516 let original_graph_description = $nodes[0].network_graph.to_string();
1517 assert!(original_graph_description.contains("42: features: 0000, node_one:"));
1518 assert_eq!($nodes[0].network_graph.read_only().channels().len(), 1);
1522 let log_entries = $nodes[0].logger.lines.lock().unwrap();
1523 let loop_counter = "Calling ChannelManager's timer_tick_occurred".to_string();
1524 if *log_entries.get(&("lightning_background_processor".to_string(), loop_counter))
1527 // Wait until the loop has gone around at least twice.
1532 let initialization_input = vec![
1533 76, 68, 75, 1, 111, 226, 140, 10, 182, 241, 179, 114, 193, 166, 162, 70, 174, 99, 247,
1534 79, 147, 30, 131, 101, 225, 90, 8, 156, 104, 214, 25, 0, 0, 0, 0, 0, 97, 227, 98, 218,
1535 0, 0, 0, 4, 2, 22, 7, 207, 206, 25, 164, 197, 231, 230, 231, 56, 102, 61, 250, 251,
1536 187, 172, 38, 46, 79, 247, 108, 44, 155, 48, 219, 238, 252, 53, 192, 6, 67, 2, 36, 125,
1537 157, 176, 223, 175, 234, 116, 94, 248, 201, 225, 97, 235, 50, 47, 115, 172, 63, 136,
1538 88, 216, 115, 11, 111, 217, 114, 84, 116, 124, 231, 107, 2, 158, 1, 242, 121, 152, 106,
1539 204, 131, 186, 35, 93, 70, 216, 10, 237, 224, 183, 89, 95, 65, 3, 83, 185, 58, 138,
1540 181, 64, 187, 103, 127, 68, 50, 2, 201, 19, 17, 138, 136, 149, 185, 226, 156, 137, 175,
1541 110, 32, 237, 0, 217, 90, 31, 100, 228, 149, 46, 219, 175, 168, 77, 4, 143, 38, 128,
1542 76, 97, 0, 0, 0, 2, 0, 0, 255, 8, 153, 192, 0, 2, 27, 0, 0, 0, 1, 0, 0, 255, 2, 68,
1543 226, 0, 6, 11, 0, 1, 2, 3, 0, 0, 0, 2, 0, 40, 0, 0, 0, 0, 0, 0, 3, 232, 0, 0, 3, 232,
1544 0, 0, 0, 1, 0, 0, 0, 0, 58, 85, 116, 216, 255, 8, 153, 192, 0, 2, 27, 0, 0, 25, 0, 0,
1545 0, 1, 0, 0, 0, 125, 255, 2, 68, 226, 0, 6, 11, 0, 1, 5, 0, 0, 0, 0, 29, 129, 25, 192,
1547 $nodes[0].rapid_gossip_sync.update_network_graph_no_std(&initialization_input[..], Some(1642291930)).unwrap();
1549 // this should have added two channels and pruned the previous one.
1550 assert_eq!($nodes[0].network_graph.read_only().channels().len(), 2);
1552 $receive.expect("Network graph not pruned within deadline");
1554 // all channels should now be pruned
1555 assert_eq!($nodes[0].network_graph.read_only().channels().len(), 0);
1560 fn test_not_pruning_network_graph_until_graph_sync_completion() {
1561 let (sender, receiver) = std::sync::mpsc::sync_channel(1);
1563 let (_, nodes) = create_nodes(2, "test_not_pruning_network_graph_until_graph_sync_completion");
1564 let data_dir = nodes[0].persister.get_data_dir();
1565 let persister = Arc::new(Persister::new(data_dir).with_graph_persistence_notifier(sender));
1567 let event_handler = |_: _| {};
1568 let background_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].rapid_gossip_sync(), nodes[0].peer_manager.clone(), nodes[0].logger.clone(), Some(nodes[0].scorer.clone()));
1570 do_test_not_pruning_network_graph_until_graph_sync_completion!(nodes,
1571 receiver.recv_timeout(Duration::from_secs(super::FIRST_NETWORK_PRUNE_TIMER * 5)),
1572 std::thread::sleep(Duration::from_millis(1)));
1574 background_processor.stop().unwrap();
1578 #[cfg(feature = "futures")]
1579 async fn test_not_pruning_network_graph_until_graph_sync_completion_async() {
1580 let (sender, receiver) = std::sync::mpsc::sync_channel(1);
1582 let (_, nodes) = create_nodes(2, "test_not_pruning_network_graph_until_graph_sync_completion_async");
1583 let data_dir = nodes[0].persister.get_data_dir();
1584 let persister = Arc::new(Persister::new(data_dir).with_graph_persistence_notifier(sender));
1586 let (exit_sender, exit_receiver) = tokio::sync::watch::channel(());
1587 let bp_future = super::process_events_async(
1588 persister, |_: _| {async {}}, nodes[0].chain_monitor.clone(), nodes[0].node.clone(),
1589 nodes[0].rapid_gossip_sync(), nodes[0].peer_manager.clone(), nodes[0].logger.clone(),
1590 Some(nodes[0].scorer.clone()), move |dur: Duration| {
1591 let mut exit_receiver = exit_receiver.clone();
1592 Box::pin(async move {
1594 _ = tokio::time::sleep(dur) => false,
1595 _ = exit_receiver.changed() => true,
1601 let t1 = tokio::spawn(bp_future);
1602 let t2 = tokio::spawn(async move {
1603 do_test_not_pruning_network_graph_until_graph_sync_completion!(nodes, {
1606 tokio::time::sleep(Duration::from_secs(super::FIRST_NETWORK_PRUNE_TIMER)).await;
1607 if let Ok(()) = receiver.try_recv() { break Ok::<(), ()>(()); }
1611 }, tokio::time::sleep(Duration::from_millis(1)).await);
1612 exit_sender.send(()).unwrap();
1614 let (r1, r2) = tokio::join!(t1, t2);
1615 r1.unwrap().unwrap();
1619 macro_rules! do_test_payment_path_scoring {
1620 ($nodes: expr, $receive: expr) => {
1621 // Ensure that we update the scorer when relevant events are processed. In this case, we ensure
1622 // that we update the scorer upon a payment path succeeding (note that the channel must be
1623 // public or else we won't score it).
1624 // A background event handler for FundingGenerationReady events must be hooked up to a
1625 // running background processor.
1626 let scored_scid = 4242;
1627 let secp_ctx = Secp256k1::new();
1628 let node_1_privkey = SecretKey::from_slice(&[42; 32]).unwrap();
1629 let node_1_id = PublicKey::from_secret_key(&secp_ctx, &node_1_privkey);
1631 let path = Path { hops: vec![RouteHop {
1633 node_features: NodeFeatures::empty(),
1634 short_channel_id: scored_scid,
1635 channel_features: ChannelFeatures::empty(),
1637 cltv_expiry_delta: MIN_CLTV_EXPIRY_DELTA as u32,
1638 }], blinded_tail: None };
1640 $nodes[0].scorer.lock().unwrap().expect(TestResult::PaymentFailure { path: path.clone(), short_channel_id: scored_scid });
1641 $nodes[0].node.push_pending_event(Event::PaymentPathFailed {
1643 payment_hash: PaymentHash([42; 32]),
1644 payment_failed_permanently: false,
1645 failure: PathFailure::OnPath { network_update: None },
1647 short_channel_id: Some(scored_scid),
1649 let event = $receive.expect("PaymentPathFailed not handled within deadline");
1651 Event::PaymentPathFailed { .. } => {},
1652 _ => panic!("Unexpected event"),
1655 // Ensure we'll score payments that were explicitly failed back by the destination as
1657 $nodes[0].scorer.lock().unwrap().expect(TestResult::ProbeSuccess { path: path.clone() });
1658 $nodes[0].node.push_pending_event(Event::PaymentPathFailed {
1660 payment_hash: PaymentHash([42; 32]),
1661 payment_failed_permanently: true,
1662 failure: PathFailure::OnPath { network_update: None },
1664 short_channel_id: None,
1666 let event = $receive.expect("PaymentPathFailed not handled within deadline");
1668 Event::PaymentPathFailed { .. } => {},
1669 _ => panic!("Unexpected event"),
1672 $nodes[0].scorer.lock().unwrap().expect(TestResult::PaymentSuccess { path: path.clone() });
1673 $nodes[0].node.push_pending_event(Event::PaymentPathSuccessful {
1674 payment_id: PaymentId([42; 32]),
1678 let event = $receive.expect("PaymentPathSuccessful not handled within deadline");
1680 Event::PaymentPathSuccessful { .. } => {},
1681 _ => panic!("Unexpected event"),
1684 $nodes[0].scorer.lock().unwrap().expect(TestResult::ProbeSuccess { path: path.clone() });
1685 $nodes[0].node.push_pending_event(Event::ProbeSuccessful {
1686 payment_id: PaymentId([42; 32]),
1687 payment_hash: PaymentHash([42; 32]),
1690 let event = $receive.expect("ProbeSuccessful not handled within deadline");
1692 Event::ProbeSuccessful { .. } => {},
1693 _ => panic!("Unexpected event"),
1696 $nodes[0].scorer.lock().unwrap().expect(TestResult::ProbeFailure { path: path.clone() });
1697 $nodes[0].node.push_pending_event(Event::ProbeFailed {
1698 payment_id: PaymentId([42; 32]),
1699 payment_hash: PaymentHash([42; 32]),
1701 short_channel_id: Some(scored_scid),
1703 let event = $receive.expect("ProbeFailure not handled within deadline");
1705 Event::ProbeFailed { .. } => {},
1706 _ => panic!("Unexpected event"),
1712 fn test_payment_path_scoring() {
1713 let (sender, receiver) = std::sync::mpsc::sync_channel(1);
1714 let event_handler = move |event: Event| match event {
1715 Event::PaymentPathFailed { .. } => sender.send(event).unwrap(),
1716 Event::PaymentPathSuccessful { .. } => sender.send(event).unwrap(),
1717 Event::ProbeSuccessful { .. } => sender.send(event).unwrap(),
1718 Event::ProbeFailed { .. } => sender.send(event).unwrap(),
1719 _ => panic!("Unexpected event: {:?}", event),
1722 let (_, nodes) = create_nodes(1, "test_payment_path_scoring");
1723 let data_dir = nodes[0].persister.get_data_dir();
1724 let persister = Arc::new(Persister::new(data_dir));
1725 let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].no_gossip_sync(), nodes[0].peer_manager.clone(), nodes[0].logger.clone(), Some(nodes[0].scorer.clone()));
1727 do_test_payment_path_scoring!(nodes, receiver.recv_timeout(Duration::from_secs(EVENT_DEADLINE)));
1729 if !std::thread::panicking() {
1730 bg_processor.stop().unwrap();
1733 let log_entries = nodes[0].logger.lines.lock().unwrap();
1734 let expected_log = "Persisting scorer after update".to_string();
1735 assert_eq!(*log_entries.get(&("lightning_background_processor".to_string(), expected_log)).unwrap(), 5);
1739 #[cfg(feature = "futures")]
1740 async fn test_payment_path_scoring_async() {
1741 let (sender, mut receiver) = tokio::sync::mpsc::channel(1);
1742 let event_handler = move |event: Event| {
1743 let sender_ref = sender.clone();
1746 Event::PaymentPathFailed { .. } => { sender_ref.send(event).await.unwrap() },
1747 Event::PaymentPathSuccessful { .. } => { sender_ref.send(event).await.unwrap() },
1748 Event::ProbeSuccessful { .. } => { sender_ref.send(event).await.unwrap() },
1749 Event::ProbeFailed { .. } => { sender_ref.send(event).await.unwrap() },
1750 _ => panic!("Unexpected event: {:?}", event),
1755 let (_, nodes) = create_nodes(1, "test_payment_path_scoring_async");
1756 let data_dir = nodes[0].persister.get_data_dir();
1757 let persister = Arc::new(Persister::new(data_dir));
1759 let (exit_sender, exit_receiver) = tokio::sync::watch::channel(());
1761 let bp_future = super::process_events_async(
1762 persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(),
1763 nodes[0].no_gossip_sync(), nodes[0].peer_manager.clone(), nodes[0].logger.clone(),
1764 Some(nodes[0].scorer.clone()), move |dur: Duration| {
1765 let mut exit_receiver = exit_receiver.clone();
1766 Box::pin(async move {
1768 _ = tokio::time::sleep(dur) => false,
1769 _ = exit_receiver.changed() => true,
1774 let t1 = tokio::spawn(bp_future);
1775 let t2 = tokio::spawn(async move {
1776 do_test_payment_path_scoring!(nodes, receiver.recv().await);
1777 exit_sender.send(()).unwrap();
1779 let log_entries = nodes[0].logger.lines.lock().unwrap();
1780 let expected_log = "Persisting scorer after update".to_string();
1781 assert_eq!(*log_entries.get(&("lightning_background_processor".to_string(), expected_log)).unwrap(), 5);
1784 let (r1, r2) = tokio::join!(t1, t2);
1785 r1.unwrap().unwrap();