From: Jeffrey Czyz Date: Wed, 15 Sep 2021 02:38:00 +0000 (-0500) Subject: Update NetworkGraph in BackgroundProcessor X-Git-Tag: v0.0.101~20^2 X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=commitdiff_plain;h=992df51001af62a8fb9d39d3c2fb70f26918d740;p=rust-lightning Update NetworkGraph in BackgroundProcessor Decorate the user-supplied EventHandler with NetGraphMsgHandler in the BackgroundProcessor. The resulting handler will intercept PaymentFailed events in order to update the NetworkGraph in the background before delegating to the user's event handler. --- diff --git a/lightning-background-processor/src/lib.rs b/lightning-background-processor/src/lib.rs index 7604ba1e5..4e6fb6f02 100644 --- a/lightning-background-processor/src/lib.rs +++ b/lightning-background-processor/src/lib.rs @@ -17,7 +17,8 @@ use lightning::ln::channelmanager::ChannelManager; use lightning::ln::msgs::{ChannelMessageHandler, RoutingMessageHandler}; use lightning::ln::peer_handler::{PeerManager, SocketDescriptor}; use lightning::ln::peer_handler::CustomMessageHandler; -use lightning::util::events::{EventHandler, EventsProvider}; +use lightning::routing::network_graph::NetGraphMsgHandler; +use lightning::util::events::{Event, EventHandler, EventsProvider}; use lightning::util::logger::Logger; use std::sync::Arc; use std::sync::atomic::{AtomicBool, Ordering}; @@ -99,6 +100,33 @@ ChannelManagerPersister for Fun where } } +/// Decorates an [`EventHandler`] with common functionality provided by standard [`EventHandler`]s. +struct DecoratingEventHandler< + E: EventHandler, + N: Deref>, + A: Deref, + L: Deref, +> +where A::Target: chain::Access, L::Target: Logger { + event_handler: E, + net_graph_msg_handler: Option, +} + +impl< + E: EventHandler, + N: Deref>, + A: Deref, + L: Deref, +> EventHandler for DecoratingEventHandler +where A::Target: chain::Access, L::Target: Logger { + fn handle_event(&self, event: &Event) { + if let Some(event_handler) = &self.net_graph_msg_handler { + event_handler.handle_event(event); + } + self.event_handler.handle_event(event); + } +} + impl BackgroundProcessor { /// Start a background thread that takes care of responsibilities enumerated in the [top-level /// documentation]. @@ -121,8 +149,9 @@ impl BackgroundProcessor { /// # Event Handling /// /// `event_handler` is responsible for handling events that users should be notified of (e.g., - /// payment failed). A user's [`EventHandler`] may be decorated with other handlers to implement - /// common functionality. See individual [`Event`]s for further details. + /// payment failed). [`BackgroundProcessor`] may decorate the given [`EventHandler`] with common + /// functionality implemented by other handlers. + /// * [`NetGraphMsgHandler`] if given will update the [`NetworkGraph`] based on payment failures. /// /// [top-level documentation]: Self /// [`join`]: Self::join @@ -130,9 +159,10 @@ impl BackgroundProcessor { /// [`ChannelManager`]: lightning::ln::channelmanager::ChannelManager /// [`ChannelManager::write`]: lightning::ln::channelmanager::ChannelManager#impl-Writeable /// [`FilesystemPersister::persist_manager`]: lightning_persister::FilesystemPersister::persist_manager - /// [`Event`]: lightning::util::events::Event + /// [`NetworkGraph`]: lightning::routing::network_graph::NetworkGraph pub fn start< Signer: 'static + Sign, + CA: 'static + Deref + Send + Sync, CF: 'static + Deref + Send + Sync, CW: 'static + Deref + Send + Sync, T: 'static + Deref + Send + Sync, @@ -147,11 +177,15 @@ impl BackgroundProcessor { CMP: 'static + Send + ChannelManagerPersister, M: 'static + Deref> + Send + Sync, CM: 'static + Deref> + Send + Sync, + NG: 'static + Deref> + Send + Sync, UMH: 'static + Deref + Send + Sync, PM: 'static + Deref> + Send + Sync, - > - (persister: CMP, event_handler: EH, chain_monitor: M, channel_manager: CM, peer_manager: PM, logger: L) -> Self + >( + persister: CMP, event_handler: EH, chain_monitor: M, channel_manager: CM, + net_graph_msg_handler: Option, peer_manager: PM, logger: L + ) -> Self where + CA::Target: 'static + chain::Access, CF::Target: 'static + chain::Filter, CW::Target: 'static + chain::Watch, T::Target: 'static + BroadcasterInterface, @@ -166,6 +200,8 @@ impl BackgroundProcessor { let stop_thread = Arc::new(AtomicBool::new(false)); let stop_thread_clone = stop_thread.clone(); let handle = thread::spawn(move || -> Result<(), std::io::Error> { + let event_handler = DecoratingEventHandler { event_handler, net_graph_msg_handler }; + log_trace!(logger, "Calling ChannelManager's timer_tick_occurred on startup"); channel_manager.timer_tick_occurred(); @@ -274,6 +310,7 @@ mod tests { use lightning::ln::features::InitFeatures; use lightning::ln::msgs::{ChannelMessageHandler, Init}; use lightning::ln::peer_handler::{PeerManager, MessageHandler, SocketDescriptor, IgnoringMessageHandler}; + use lightning::routing::network_graph::{NetworkGraph, NetGraphMsgHandler}; use lightning::util::config::UserConfig; use lightning::util::events::{Event, MessageSendEventsProvider, MessageSendEvent}; use lightning::util::ser::Writeable; @@ -301,6 +338,7 @@ mod tests { struct Node { node: Arc>, + net_graph_msg_handler: Option, Arc>>>, peer_manager: Arc, Arc, Arc, IgnoringMessageHandler>>, chain_monitor: Arc, persister: Arc, @@ -335,15 +373,18 @@ mod tests { let persister = Arc::new(FilesystemPersister::new(format!("{}_persister_{}", persist_dir, i))); let seed = [i as u8; 32]; let network = Network::Testnet; - let now = Duration::from_secs(genesis_block(network).header.time as u64); + let genesis_block = genesis_block(network); + let now = Duration::from_secs(genesis_block.header.time as u64); let keys_manager = Arc::new(KeysManager::new(&seed, now.as_secs(), now.subsec_nanos())); let chain_monitor = Arc::new(chainmonitor::ChainMonitor::new(Some(chain_source.clone()), tx_broadcaster.clone(), logger.clone(), fee_estimator.clone(), persister.clone())); let best_block = BestBlock::from_genesis(network); let params = ChainParameters { network, best_block }; let manager = Arc::new(ChannelManager::new(fee_estimator.clone(), chain_monitor.clone(), tx_broadcaster.clone(), logger.clone(), keys_manager.clone(), UserConfig::default(), params)); + let network_graph = NetworkGraph::new(genesis_block.header.block_hash()); + let net_graph_msg_handler = Some(Arc::new(NetGraphMsgHandler::new(network_graph, Some(chain_source.clone()), logger.clone()))); let msg_handler = MessageHandler { chan_handler: Arc::new(test_utils::TestChannelMessageHandler::new()), route_handler: Arc::new(test_utils::TestRoutingMessageHandler::new() )}; let peer_manager = Arc::new(PeerManager::new(msg_handler, keys_manager.get_node_secret(), &seed, logger.clone(), IgnoringMessageHandler{})); - let node = Node { node: manager, peer_manager, chain_monitor, persister, tx_broadcaster, logger, best_block }; + let node = Node { node: manager, net_graph_msg_handler, peer_manager, chain_monitor, persister, tx_broadcaster, logger, best_block }; nodes.push(node); } @@ -441,7 +482,7 @@ mod tests { let data_dir = nodes[0].persister.get_data_dir(); let persister = move |node: &ChannelManager, Arc, Arc, Arc, Arc>| FilesystemPersister::persist_manager(data_dir.clone(), node); let event_handler = |_: &_| {}; - let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].peer_manager.clone(), nodes[0].logger.clone()); + let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].net_graph_msg_handler.clone(), nodes[0].peer_manager.clone(), nodes[0].logger.clone()); macro_rules! check_persisted_data { ($node: expr, $filepath: expr, $expected_bytes: expr) => { @@ -494,7 +535,7 @@ mod tests { let data_dir = nodes[0].persister.get_data_dir(); let persister = move |node: &ChannelManager, Arc, Arc, Arc, Arc>| FilesystemPersister::persist_manager(data_dir.clone(), node); let event_handler = |_: &_| {}; - let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].peer_manager.clone(), nodes[0].logger.clone()); + let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].net_graph_msg_handler.clone(), nodes[0].peer_manager.clone(), nodes[0].logger.clone()); loop { let log_entries = nodes[0].logger.lines.lock().unwrap(); let desired_log = "Calling ChannelManager's timer_tick_occurred".to_string(); @@ -516,7 +557,7 @@ mod tests { let persister = |_: &_| Err(std::io::Error::new(std::io::ErrorKind::Other, "test")); let event_handler = |_: &_| {}; - let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].peer_manager.clone(), nodes[0].logger.clone()); + let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].net_graph_msg_handler.clone(), nodes[0].peer_manager.clone(), nodes[0].logger.clone()); match bg_processor.join() { Ok(_) => panic!("Expected error persisting manager"), Err(e) => { @@ -538,7 +579,7 @@ mod tests { let event_handler = move |event: &Event| { sender.send(handle_funding_generation_ready!(event, channel_value)).unwrap(); }; - let bg_processor = BackgroundProcessor::start(persister.clone(), event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].peer_manager.clone(), nodes[0].logger.clone()); + let bg_processor = BackgroundProcessor::start(persister.clone(), event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].net_graph_msg_handler.clone(), nodes[0].peer_manager.clone(), nodes[0].logger.clone()); // Open a channel and check that the FundingGenerationReady event was handled. begin_open_channel!(nodes[0], nodes[1], channel_value); @@ -562,7 +603,7 @@ mod tests { // Set up a background event handler for SpendableOutputs events. let (sender, receiver) = std::sync::mpsc::sync_channel(1); let event_handler = move |event: &Event| sender.send(event.clone()).unwrap(); - let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].peer_manager.clone(), nodes[0].logger.clone()); + let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].net_graph_msg_handler.clone(), nodes[0].peer_manager.clone(), nodes[0].logger.clone()); // Force close the channel and check that the SpendableOutputs event was handled. nodes[0].node.force_close_channel(&nodes[0].node.list_channels()[0].channel_id).unwrap();