From: Antoine Riard <dev@ariard.me>
Date: Mon, 20 Sep 2021 23:51:46 +0000 (-0400)
Subject: -f address lastest Matt's comments
X-Git-Url: http://git.bitcoin.ninja/?a=commitdiff_plain;h=2c77c9b021bdbcf57a2e40097e73722f1770e5e0;p=rust-lightning

-f address lastest Matt's comments
---

diff --git a/lightning/src/ln/channelmanager.rs b/lightning/src/ln/channelmanager.rs
index 1e6a865e2..6ab97c242 100644
--- a/lightning/src/ln/channelmanager.rs
+++ b/lightning/src/ln/channelmanager.rs
@@ -242,7 +242,7 @@ type ShutdownResult = (Option<(OutPoint, ChannelMonitorUpdate)>, Vec<(HTLCSource
 
 struct MsgHandleErrInternal {
 	err: msgs::LightningError,
-	chan_id: Option<[u8; 32]>,
+	chan_id: Option<[u8; 32]>, // If Some a channel of ours has been closed
 	shutdown_finish: Option<(ShutdownResult, Option<msgs::ChannelUpdate>)>,
 }
 impl MsgHandleErrInternal {
@@ -1372,6 +1372,12 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
 								msg: channel_update
 							});
 						}
+						if let Ok(mut pending_events_lock) = self.pending_events.lock() {
+							pending_events_lock.push(events::Event::ChannelClosed {
+								channel_id: *channel_id,
+								reason: ClosureReason::HolderForceClosed
+							});
+						}
 					}
 					break Ok(());
 				},
@@ -4093,6 +4099,13 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
 								});
 							}
 
+							if let Ok(mut pending_events_lock) = self.pending_events.lock() {
+								pending_events_lock.push(events::Event::ChannelClosed {
+									channel_id: *channel_id,
+									reason: ClosureReason::HolderForceClosed
+								});
+							}
+
 							log_info!(self.logger, "Broadcasting {}", log_tx!(tx));
 							self.tx_broadcaster.broadcast_transaction(&tx);
 							false
@@ -5316,6 +5329,7 @@ impl<'a, Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref>
 		let mut funding_txo_set = HashSet::with_capacity(cmp::min(channel_count as usize, 128));
 		let mut by_id = HashMap::with_capacity(cmp::min(channel_count as usize, 128));
 		let mut short_to_id = HashMap::with_capacity(cmp::min(channel_count as usize, 128));
+		let mut channel_closures = Vec::new();
 		for _ in 0..channel_count {
 			let mut channel: Channel<Signer> = Channel::read(reader, &args.keys_manager)?;
 			let funding_txo = channel.get_funding_txo().ok_or(DecodeError::InvalidValue)?;
@@ -5346,6 +5360,10 @@ impl<'a, Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref>
 					let (_, mut new_failed_htlcs) = channel.force_shutdown(true);
 					failed_htlcs.append(&mut new_failed_htlcs);
 					monitor.broadcast_latest_holder_commitment_txn(&args.tx_broadcaster, &args.logger);
+					channel_closures.push(events::Event::ChannelClosed {
+						channel_id: channel.channel_id(),
+						reason: ClosureReason::OutdatedChanMan
+					});
 				} else {
 					if let Some(short_channel_id) = channel.get_short_channel_id() {
 						short_to_id.insert(short_channel_id, channel.channel_id());
@@ -5453,6 +5471,10 @@ impl<'a, Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref>
 		let mut secp_ctx = Secp256k1::new();
 		secp_ctx.seeded_randomize(&args.keys_manager.get_secure_random_bytes());
 
+		if !channel_closures.is_empty() {
+			pending_events_read.append(&mut channel_closures);
+		}
+
 		let channel_manager = ChannelManager {
 			genesis_hash,
 			fee_estimator: args.fee_estimator,
diff --git a/lightning/src/util/events.rs b/lightning/src/util/events.rs
index 5a91758d8..691d30a84 100644
--- a/lightning/src/util/events.rs
+++ b/lightning/src/util/events.rs
@@ -73,12 +73,15 @@ pub enum PaymentPurpose {
 /// The reason which the channel was closed. See individual variants more details.
 pub enum ClosureReason {
 	/// Closure generated from receiving a peer error message.
+	///
+	/// Our counterparty may have broadcasted their latest commitment state, and we have
+	/// as well
 	CounterpartyForceClosed {
 		/// The error which the peer sent us.
 		///
 		/// The string should be sanitized before it is used (e.g emitted to logs
-		/// or printed to stdout). Otherwise, a well crafted error message may trigger
-		/// a security in the terminal emulator or the logging subsystem.
+		/// or printed to stdout). Otherwise, a well crafted error message may exploit
+		/// a security vulnerability in the terminal emulator or the logging subsystem.
 		peer_msg: String,
 	},
 	/// Closure generated from [`ChannelManager::force_close_channel`], called by the user.
@@ -96,9 +99,11 @@ pub enum ClosureReason {
 		err: String,
 	},
 	/// The `PeerManager` informed us that we've disconnected from the peer and that it is
-	/// unlikely we'll be able to connect to the peer, most likely because we have incompatible
-	/// features and the peer, or we, require features which we, or the peer, do not support.
+	/// unlikely we'll be able to connect to the peer.
 	DisconnectedPeer,
+	/// Closure generated from [`ChannelManager::read`] if the ChannelMonitor is newer than
+	/// the ChannelManager deserialized.
+	OutdatedChanMan
 }
 
 impl_writeable_tlv_based_enum_upgradable!(ClosureReason,
@@ -108,6 +113,7 @@ impl_writeable_tlv_based_enum_upgradable!(ClosureReason,
 	(4, CooperativeClosure) => {},
 	(8, ProcessingError) => { (1, err, required) },
 	(10, DisconnectedPeer) => {},
+	(12, OutdatedChanMan) => {},
 );
 
 /// An Event which you should probably take some action in response to.