X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fchain%2Fchainmonitor.rs;h=0f128af4afffaf48cb4de4b384030bca4c547575;hb=9c9e5f896c967d459d18d0c592c0a7a9efb3df98;hp=086a848af77aa05c7ea4e8e97e93c4e6fb5e9628;hpb=5e6a0d5f3820d9c3edc3abf5639f8fb7c0592417;p=rust-lightning

diff --git a/lightning/src/chain/chainmonitor.rs b/lightning/src/chain/chainmonitor.rs
index 086a848a..0f128af4 100644
--- a/lightning/src/chain/chainmonitor.rs
+++ b/lightning/src/chain/chainmonitor.rs
@@ -110,7 +110,7 @@ impl MonitorUpdateId {
 ///    If at some point no further progress can be made towards persisting the pending updates, the
 ///    node should simply shut down.
 ///
-///  * If the persistence has failed and cannot be retried further (e.g. because of some timeout),
+///  * If the persistence has failed and cannot be retried further (e.g. because of an outage),
 ///    [`ChannelMonitorUpdateStatus::UnrecoverableError`] can be used, though this will result in
 ///    an immediate panic and future operations in LDK generally failing.
 ///
@@ -125,7 +125,10 @@ impl MonitorUpdateId {
 ///  [`ChainMonitor::channel_monitor_updated`] must be called once for *each* update which occurs.
 ///
 ///  If at some point no further progress can be made towards persisting a pending update, the node
-///  should simply shut down.
+///  should simply shut down. Until then, the background task should either loop indefinitely, or
+///  persistence should be regularly retried with [`ChainMonitor::list_pending_monitor_updates`]
+///  and [`ChainMonitor::get_monitor`] (note that if a full monitor is persisted all pending
+///  monitor updates may be marked completed).
 ///
 /// # Using remote watchtowers
 ///
@@ -164,8 +167,8 @@ pub trait Persist<ChannelSigner: WriteableEcdsaChannelSigner> {
 	/// updated monitor itself to disk/backups. See the [`Persist`] trait documentation for more
 	/// details.
 	///
-	/// During blockchain synchronization operations, this may be called with no
-	/// [`ChannelMonitorUpdate`], in which case the full [`ChannelMonitor`] needs to be persisted.
+	/// During blockchain synchronization operations, and in some rare cases, this may be called with
+	/// no [`ChannelMonitorUpdate`], in which case the full [`ChannelMonitor`] needs to be persisted.
 	/// Note that after the full [`ChannelMonitor`] is persisted any previous
 	/// [`ChannelMonitorUpdate`]s which were persisted should be discarded - they can no longer be
 	/// applied to the persisted [`ChannelMonitor`] as they were already applied.
@@ -321,7 +324,6 @@ where C::Target: chain::Filter,
 				if self.update_monitor_with_chain_data(header, best_height, txdata, &process, funding_outpoint, &monitor_state).is_err() {
 					// Take the monitors lock for writing so that we poison it and any future
 					// operations going forward fail immediately.
-					core::mem::drop(monitor_state);
 					core::mem::drop(monitor_lock);
 					let _poison = self.monitors.write().unwrap();
 					log_error!(self.logger, "{}", err_str);
@@ -432,7 +434,8 @@ where C::Target: chain::Filter,
 	/// claims which are awaiting confirmation.
 	///
 	/// Includes the balances from each [`ChannelMonitor`] *except* those included in
-	/// `ignored_channels`.
+	/// `ignored_channels`, allowing you to filter out balances from channels which are still open
+	/// (and whose balance should likely be pulled from the [`ChannelDetails`]).
 	///
 	/// See [`ChannelMonitor::get_claimable_balances`] for more details on the exact criteria for
 	/// inclusion in the return value.
@@ -763,7 +766,7 @@ where C::Target: chain::Filter,
 			Some(monitor_state) => {
 				let monitor = &monitor_state.monitor;
 				log_trace!(self.logger, "Updating ChannelMonitor for channel {}", log_funding_info!(monitor));
-				let update_res = monitor.update_monitor(update, &self.broadcaster, &*self.fee_estimator, &self.logger);
+				let update_res = monitor.update_monitor(update, &self.broadcaster, &self.fee_estimator, &self.logger);
 
 				let update_id = MonitorUpdateId::from_monitor_update(update);
 				let mut pending_monitor_updates = monitor_state.pending_monitor_updates.lock().unwrap();
@@ -811,12 +814,7 @@ where C::Target: chain::Filter,
 		let mut pending_monitor_events = self.pending_monitor_events.lock().unwrap().split_off(0);
 		for monitor_state in self.monitors.read().unwrap().values() {
 			let is_pending_monitor_update = monitor_state.has_pending_chainsync_updates(&monitor_state.pending_monitor_updates.lock().unwrap());
-			if is_pending_monitor_update &&
-					monitor_state.last_chain_persist_height.load(Ordering::Acquire) + LATENCY_GRACE_PERIOD_BLOCKS as usize
-						> self.highest_chain_height.load(Ordering::Acquire)
-			{
-				log_debug!(self.logger, "A Channel Monitor sync is still in progress, refusing to provide monitor events!");
-			} else {
+			if !is_pending_monitor_update || monitor_state.last_chain_persist_height.load(Ordering::Acquire) + LATENCY_GRACE_PERIOD_BLOCKS as usize <= self.highest_chain_height.load(Ordering::Acquire) {
 				if is_pending_monitor_update {
 					log_error!(self.logger, "A ChannelMonitor sync took longer than {} blocks to complete.", LATENCY_GRACE_PERIOD_BLOCKS);
 					log_error!(self.logger, "   To avoid funds-loss, we are allowing monitor updates to be released.");