Merge pull request #2101 from TheBlueMatt/2023-03-one-less-sig
[rust-lightning] / lightning / src / ln / channelmanager.rs
index c8adc721235470dc37bce5a9a2651fc8e74dc8ed..b5e5a43fee828515cd6c3f5570113615354758c3 100644 (file)
@@ -308,9 +308,9 @@ impl core::hash::Hash for HTLCSource {
                }
        }
 }
-#[cfg(not(feature = "grind_signatures"))]
-#[cfg(test)]
 impl HTLCSource {
+       #[cfg(not(feature = "grind_signatures"))]
+       #[cfg(test)]
        pub fn dummy() -> Self {
                HTLCSource::OutboundRoute {
                        path: Vec::new(),
@@ -320,6 +320,18 @@ impl HTLCSource {
                        payment_secret: None,
                }
        }
+
+       #[cfg(debug_assertions)]
+       /// Checks whether this HTLCSource could possibly match the given HTLC output in a commitment
+       /// transaction. Useful to ensure different datastructures match up.
+       pub(crate) fn possibly_matches_output(&self, htlc: &super::chan_utils::HTLCOutputInCommitment) -> bool {
+               if let HTLCSource::OutboundRoute { first_hop_htlc_msat, .. } = self {
+                       *first_hop_htlc_msat == htlc.amount_msat
+               } else {
+                       // There's nothing we can check for forwarded HTLCs
+                       true
+               }
+       }
 }
 
 struct ReceiveError {
@@ -1496,18 +1508,31 @@ macro_rules! send_channel_ready {
        }}
 }
 
+macro_rules! emit_channel_pending_event {
+       ($locked_events: expr, $channel: expr) => {
+               if $channel.should_emit_channel_pending_event() {
+                       $locked_events.push(events::Event::ChannelPending {
+                               channel_id: $channel.channel_id(),
+                               former_temporary_channel_id: $channel.temporary_channel_id(),
+                               counterparty_node_id: $channel.get_counterparty_node_id(),
+                               user_channel_id: $channel.get_user_id(),
+                               funding_txo: $channel.get_funding_txo().unwrap().into_bitcoin_outpoint(),
+                       });
+                       $channel.set_channel_pending_event_emitted();
+               }
+       }
+}
+
 macro_rules! emit_channel_ready_event {
-       ($self: expr, $channel: expr) => {
+       ($locked_events: expr, $channel: expr) => {
                if $channel.should_emit_channel_ready_event() {
-                       {
-                               let mut pending_events = $self.pending_events.lock().unwrap();
-                               pending_events.push(events::Event::ChannelReady {
-                                       channel_id: $channel.channel_id(),
-                                       user_channel_id: $channel.get_user_id(),
-                                       counterparty_node_id: $channel.get_counterparty_node_id(),
-                                       channel_type: $channel.get_channel_type().clone(),
-                               });
-                       }
+                       debug_assert!($channel.channel_pending_event_emitted());
+                       $locked_events.push(events::Event::ChannelReady {
+                               channel_id: $channel.channel_id(),
+                               user_channel_id: $channel.get_user_id(),
+                               counterparty_node_id: $channel.get_counterparty_node_id(),
+                               channel_type: $channel.get_channel_type().clone(),
+                       });
                        $channel.set_channel_ready_event_emitted();
                }
        }
@@ -4184,6 +4209,7 @@ where
                                                                claim_from_onchain_tx: from_onchain,
                                                                prev_channel_id,
                                                                next_channel_id,
+                                                               outbound_amount_forwarded_msat: forwarded_htlc_value_msat,
                                                        }})
                                                } else { None }
                                        });
@@ -4252,8 +4278,6 @@ where
                        });
                }
 
-               emit_channel_ready_event!(self, channel);
-
                macro_rules! handle_cs { () => {
                        if let Some(update) = commitment_update {
                                pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
@@ -4286,6 +4310,12 @@ where
                        self.tx_broadcaster.broadcast_transaction(&tx);
                }
 
+               {
+                       let mut pending_events = self.pending_events.lock().unwrap();
+                       emit_channel_pending_event!(pending_events, channel);
+                       emit_channel_ready_event!(pending_events, channel);
+               }
+
                htlc_forwards
        }
 
@@ -4710,7 +4740,10 @@ where
                                        }
                                }
 
-                               emit_channel_ready_event!(self, chan.get_mut());
+                               {
+                                       let mut pending_events = self.pending_events.lock().unwrap();
+                                       emit_channel_ready_event!(pending_events, chan.get_mut());
+                               }
 
                                Ok(())
                        },
@@ -6035,7 +6068,10 @@ where
                                                        }
                                                }
 
-                                               emit_channel_ready_event!(self, channel);
+                                               {
+                                                       let mut pending_events = self.pending_events.lock().unwrap();
+                                                       emit_channel_ready_event!(pending_events, channel);
+                                               }
 
                                                if let Some(announcement_sigs) = announcement_sigs {
                                                        log_trace!(self.logger, "Sending announcement_signatures for channel {}", log_bytes!(channel.channel_id()));
@@ -6146,34 +6182,11 @@ where
                }
        }
 
-       /// Blocks until ChannelManager needs to be persisted or a timeout is reached. It returns a bool
-       /// indicating whether persistence is necessary. Only one listener on
-       /// [`await_persistable_update`], [`await_persistable_update_timeout`], or a future returned by
-       /// [`get_persistable_update_future`] is guaranteed to be woken up.
-       ///
-       /// Note that this method is not available with the `no-std` feature.
+       /// Gets a [`Future`] that completes when this [`ChannelManager`] needs to be persisted.
        ///
-       /// [`await_persistable_update`]: Self::await_persistable_update
-       /// [`await_persistable_update_timeout`]: Self::await_persistable_update_timeout
-       /// [`get_persistable_update_future`]: Self::get_persistable_update_future
-       #[cfg(any(test, feature = "std"))]
-       pub fn await_persistable_update_timeout(&self, max_wait: Duration) -> bool {
-               self.persistence_notifier.wait_timeout(max_wait)
-       }
-
-       /// Blocks until ChannelManager needs to be persisted. Only one listener on
-       /// [`await_persistable_update`], `await_persistable_update_timeout`, or a future returned by
-       /// [`get_persistable_update_future`] is guaranteed to be woken up.
+       /// Note that callbacks registered on the [`Future`] MUST NOT call back into this
+       /// [`ChannelManager`] and should instead register actions to be taken later.
        ///
-       /// [`await_persistable_update`]: Self::await_persistable_update
-       /// [`get_persistable_update_future`]: Self::get_persistable_update_future
-       pub fn await_persistable_update(&self) {
-               self.persistence_notifier.wait()
-       }
-
-       /// Gets a [`Future`] that completes when a persistable update is available. Note that
-       /// callbacks registered on the [`Future`] MUST NOT call back into this [`ChannelManager`] and
-       /// should instead register actions to be taken later.
        pub fn get_persistable_update_future(&self) -> Future {
                self.persistence_notifier.get_future()
        }
@@ -7354,6 +7367,7 @@ where
                let mut id_to_peer = HashMap::with_capacity(cmp::min(channel_count as usize, 128));
                let mut short_to_chan_info = HashMap::with_capacity(cmp::min(channel_count as usize, 128));
                let mut channel_closures = Vec::new();
+               let mut pending_background_events = Vec::new();
                for _ in 0..channel_count {
                        let mut channel: Channel<<SP::Target as SignerProvider>::Signer> = Channel::read(reader, (
                                &args.entropy_source, &args.signer_provider, best_block_height, &provided_channel_type_features(&args.default_config)
@@ -7383,9 +7397,11 @@ where
                                        log_error!(args.logger, " The channel will be force-closed and the latest commitment transaction from the ChannelMonitor broadcast.");
                                        log_error!(args.logger, " The ChannelMonitor for channel {} is at update_id {} but the ChannelManager is at update_id {}.",
                                                log_bytes!(channel.channel_id()), monitor.get_latest_update_id(), channel.get_latest_monitor_update_id());
-                                       let (_, mut new_failed_htlcs) = channel.force_shutdown(true);
+                                       let (monitor_update, mut new_failed_htlcs) = channel.force_shutdown(true);
+                                       if let Some(monitor_update) = monitor_update {
+                                               pending_background_events.push(BackgroundEvent::ClosingMonitorUpdate(monitor_update));
+                                       }
                                        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(),
                                                user_channel_id: channel.get_user_id(),
@@ -7450,10 +7466,13 @@ where
                        }
                }
 
-               for (funding_txo, monitor) in args.channel_monitors.iter_mut() {
+               for (funding_txo, _) in args.channel_monitors.iter() {
                        if !funding_txo_set.contains(funding_txo) {
-                               log_info!(args.logger, "Broadcasting latest holder commitment transaction for closed channel {}", log_bytes!(funding_txo.to_channel_id()));
-                               monitor.broadcast_latest_holder_commitment_txn(&args.tx_broadcaster, &args.logger);
+                               let monitor_update = ChannelMonitorUpdate {
+                                       update_id: CLOSED_CHANNEL_UPDATE_ID,
+                                       updates: vec![ChannelMonitorUpdateStep::ChannelForceClosed { should_broadcast: true }],
+                               };
+                               pending_background_events.push(BackgroundEvent::ClosingMonitorUpdate((*funding_txo, monitor_update)));
                        }
                }
 
@@ -7506,10 +7525,17 @@ where
                }
 
                let background_event_count: u64 = Readable::read(reader)?;
-               let mut pending_background_events_read: Vec<BackgroundEvent> = Vec::with_capacity(cmp::min(background_event_count as usize, MAX_ALLOC_SIZE/mem::size_of::<BackgroundEvent>()));
                for _ in 0..background_event_count {
                        match <u8 as Readable>::read(reader)? {
-                               0 => pending_background_events_read.push(BackgroundEvent::ClosingMonitorUpdate((Readable::read(reader)?, Readable::read(reader)?))),
+                               0 => {
+                                       let (funding_txo, monitor_update): (OutPoint, ChannelMonitorUpdate) = (Readable::read(reader)?, Readable::read(reader)?);
+                                       if pending_background_events.iter().find(|e| {
+                                               let BackgroundEvent::ClosingMonitorUpdate((pending_funding_txo, pending_monitor_update)) = e;
+                                               *pending_funding_txo == funding_txo && *pending_monitor_update == monitor_update
+                                       }).is_none() {
+                                               pending_background_events.push(BackgroundEvent::ClosingMonitorUpdate((funding_txo, monitor_update)));
+                                       }
+                               }
                                _ => return Err(DecodeError::InvalidValue),
                        }
                }
@@ -7884,7 +7910,7 @@ where
                        per_peer_state: FairRwLock::new(per_peer_state),
 
                        pending_events: Mutex::new(pending_events_read),
-                       pending_background_events: Mutex::new(pending_background_events_read),
+                       pending_background_events: Mutex::new(pending_background_events),
                        total_consistency_lock: RwLock::new(()),
                        persistence_notifier: Notifier::new(),
 
@@ -7915,6 +7941,7 @@ mod tests {
        use bitcoin::hashes::Hash;
        use bitcoin::hashes::sha256::Hash as Sha256;
        use bitcoin::secp256k1::{PublicKey, Secp256k1, SecretKey};
+       #[cfg(feature = "std")]
        use core::time::Duration;
        use core::sync::atomic::Ordering;
        use crate::events::{Event, HTLCDestination, MessageSendEvent, MessageSendEventsProvider, ClosureReason};
@@ -7940,9 +7967,9 @@ mod tests {
 
                // All nodes start with a persistable update pending as `create_network` connects each node
                // with all other nodes to make most tests simpler.
-               assert!(nodes[0].node.await_persistable_update_timeout(Duration::from_millis(1)));
-               assert!(nodes[1].node.await_persistable_update_timeout(Duration::from_millis(1)));
-               assert!(nodes[2].node.await_persistable_update_timeout(Duration::from_millis(1)));
+               assert!(nodes[0].node.get_persistable_update_future().poll_is_complete());
+               assert!(nodes[1].node.get_persistable_update_future().poll_is_complete());
+               assert!(nodes[2].node.get_persistable_update_future().poll_is_complete());
 
                let mut chan = create_announced_chan_between_nodes(&nodes, 0, 1);
 
@@ -7956,19 +7983,19 @@ mod tests {
                        &nodes[0].node.get_our_node_id()).pop().unwrap();
 
                // The first two nodes (which opened a channel) should now require fresh persistence
-               assert!(nodes[0].node.await_persistable_update_timeout(Duration::from_millis(1)));
-               assert!(nodes[1].node.await_persistable_update_timeout(Duration::from_millis(1)));
+               assert!(nodes[0].node.get_persistable_update_future().poll_is_complete());
+               assert!(nodes[1].node.get_persistable_update_future().poll_is_complete());
                // ... but the last node should not.
-               assert!(!nodes[2].node.await_persistable_update_timeout(Duration::from_millis(1)));
+               assert!(!nodes[2].node.get_persistable_update_future().poll_is_complete());
                // After persisting the first two nodes they should no longer need fresh persistence.
-               assert!(!nodes[0].node.await_persistable_update_timeout(Duration::from_millis(1)));
-               assert!(!nodes[1].node.await_persistable_update_timeout(Duration::from_millis(1)));
+               assert!(!nodes[0].node.get_persistable_update_future().poll_is_complete());
+               assert!(!nodes[1].node.get_persistable_update_future().poll_is_complete());
 
                // Node 3, unrelated to the only channel, shouldn't care if it receives a channel_update
                // about the channel.
                nodes[2].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &chan.0);
                nodes[2].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &chan.1);
-               assert!(!nodes[2].node.await_persistable_update_timeout(Duration::from_millis(1)));
+               assert!(!nodes[2].node.get_persistable_update_future().poll_is_complete());
 
                // The nodes which are a party to the channel should also ignore messages from unrelated
                // parties.
@@ -7976,8 +8003,8 @@ mod tests {
                nodes[0].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan.1);
                nodes[1].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan.0);
                nodes[1].node.handle_channel_update(&nodes[2].node.get_our_node_id(), &chan.1);
-               assert!(!nodes[0].node.await_persistable_update_timeout(Duration::from_millis(1)));
-               assert!(!nodes[1].node.await_persistable_update_timeout(Duration::from_millis(1)));
+               assert!(!nodes[0].node.get_persistable_update_future().poll_is_complete());
+               assert!(!nodes[1].node.get_persistable_update_future().poll_is_complete());
 
                // At this point the channel info given by peers should still be the same.
                assert_eq!(nodes[0].node.list_channels()[0], node_a_chan_info);
@@ -7994,8 +8021,8 @@ mod tests {
                // persisted and that its channel info remains the same.
                nodes[0].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &as_update);
                nodes[1].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &bs_update);
-               assert!(!nodes[0].node.await_persistable_update_timeout(Duration::from_millis(1)));
-               assert!(!nodes[1].node.await_persistable_update_timeout(Duration::from_millis(1)));
+               assert!(!nodes[0].node.get_persistable_update_future().poll_is_complete());
+               assert!(!nodes[1].node.get_persistable_update_future().poll_is_complete());
                assert_eq!(nodes[0].node.list_channels()[0], node_a_chan_info);
                assert_eq!(nodes[1].node.list_channels()[0], node_b_chan_info);
 
@@ -8003,8 +8030,8 @@ mod tests {
                // the channel info has updated.
                nodes[0].node.handle_channel_update(&nodes[1].node.get_our_node_id(), &bs_update);
                nodes[1].node.handle_channel_update(&nodes[0].node.get_our_node_id(), &as_update);
-               assert!(nodes[0].node.await_persistable_update_timeout(Duration::from_millis(1)));
-               assert!(nodes[1].node.await_persistable_update_timeout(Duration::from_millis(1)));
+               assert!(nodes[0].node.get_persistable_update_future().poll_is_complete());
+               assert!(nodes[1].node.get_persistable_update_future().poll_is_complete());
                assert_ne!(nodes[0].node.list_channels()[0], node_a_chan_info);
                assert_ne!(nodes[1].node.list_channels()[0], node_b_chan_info);
        }
@@ -8449,6 +8476,7 @@ mod tests {
                        assert_eq!(nodes_0_lock.len(), 1);
                        assert!(nodes_0_lock.contains_key(channel_id));
                }
+               expect_channel_pending_event(&nodes[1], &nodes[0].node.get_our_node_id());
 
                {
                        // Assert that `nodes[1]`'s `id_to_peer` map is populated with the channel as soon as
@@ -8461,6 +8489,7 @@ mod tests {
                let funding_signed = get_event_msg!(nodes[1], MessageSendEvent::SendFundingSigned, nodes[0].node.get_our_node_id());
                nodes[0].node.handle_funding_signed(&nodes[1].node.get_our_node_id(), &funding_signed);
                check_added_monitors!(nodes[0], 1);
+               expect_channel_pending_event(&nodes[0], &nodes[1].node.get_our_node_id());
                let (channel_ready, _) = create_chan_between_nodes_with_value_confirm(&nodes[0], &nodes[1], &tx);
                let (announcement, nodes_0_update, nodes_1_update) = create_chan_between_nodes_with_value_b(&nodes[0], &nodes[1], &channel_ready);
                update_nodes_with_chan_announce(&nodes, 0, 1, &announcement, &nodes_0_update, &nodes_1_update);
@@ -8603,10 +8632,13 @@ mod tests {
 
                                nodes[1].node.handle_funding_created(&nodes[0].node.get_our_node_id(), &funding_created_msg);
                                check_added_monitors!(nodes[1], 1);
+                               expect_channel_pending_event(&nodes[1], &nodes[0].node.get_our_node_id());
+
                                let funding_signed = get_event_msg!(nodes[1], MessageSendEvent::SendFundingSigned, nodes[0].node.get_our_node_id());
 
                                nodes[0].node.handle_funding_signed(&nodes[1].node.get_our_node_id(), &funding_signed);
                                check_added_monitors!(nodes[0], 1);
+                               expect_channel_pending_event(&nodes[0], &nodes[1].node.get_our_node_id());
                        }
                        open_channel_msg.temporary_channel_id = nodes[0].keys_manager.get_secure_random_bytes();
                }
@@ -8826,7 +8858,7 @@ pub mod bench {
        use crate::chain::chainmonitor::{ChainMonitor, Persist};
        use crate::chain::keysinterface::{EntropySource, KeysManager, InMemorySigner};
        use crate::events::{Event, MessageSendEvent, MessageSendEventsProvider};
-       use crate::ln::channelmanager::{self, BestBlock, ChainParameters, ChannelManager, PaymentHash, PaymentPreimage, PaymentId};
+       use crate::ln::channelmanager::{BestBlock, ChainParameters, ChannelManager, PaymentHash, PaymentPreimage, PaymentId};
        use crate::ln::functional_test_utils::*;
        use crate::ln::msgs::{ChannelMessageHandler, Init};
        use crate::routing::gossip::NetworkGraph;
@@ -8907,7 +8939,24 @@ pub mod bench {
                } else { panic!(); }
 
                node_b.handle_funding_created(&node_a.get_our_node_id(), &get_event_msg!(node_a_holder, MessageSendEvent::SendFundingCreated, node_b.get_our_node_id()));
+               let events_b = node_b.get_and_clear_pending_events();
+               assert_eq!(events_b.len(), 1);
+               match events_b[0] {
+                       Event::ChannelPending{ ref counterparty_node_id, .. } => {
+                               assert_eq!(*counterparty_node_id, node_a.get_our_node_id());
+                       },
+                       _ => panic!("Unexpected event"),
+               }
+
                node_a.handle_funding_signed(&node_b.get_our_node_id(), &get_event_msg!(node_b_holder, MessageSendEvent::SendFundingSigned, node_a.get_our_node_id()));
+               let events_a = node_a.get_and_clear_pending_events();
+               assert_eq!(events_a.len(), 1);
+               match events_a[0] {
+                       Event::ChannelPending{ ref counterparty_node_id, .. } => {
+                               assert_eq!(*counterparty_node_id, node_b.get_our_node_id());
+                       },
+                       _ => panic!("Unexpected event"),
+               }
 
                assert_eq!(&tx_broadcaster.txn_broadcasted.lock().unwrap()[..], &[tx.clone()]);