Remove get_p2wpkh_redeemscript in favor of lib helper
[rust-lightning] / lightning / src / ln / channelmanager.rs
index 570f04b628a7a5590d93de0b37edc43b5a5af32f..465256d21ea99bfa136062c8272c4dc34f65316b 100644 (file)
@@ -1348,7 +1348,7 @@ macro_rules! convert_chan_err {
 }
 
 macro_rules! break_chan_entry {
-       ($self: ident, $res: expr, $channel_state: expr, $entry: expr) => {
+       ($self: ident, $res: expr, $entry: expr) => {
                match $res {
                        Ok(res) => res,
                        Err(e) => {
@@ -1363,7 +1363,7 @@ macro_rules! break_chan_entry {
 }
 
 macro_rules! try_chan_entry {
-       ($self: ident, $res: expr, $channel_state: expr, $entry: expr) => {
+       ($self: ident, $res: expr, $entry: expr) => {
                match $res {
                        Ok(res) => res,
                        Err(e) => {
@@ -1378,7 +1378,7 @@ macro_rules! try_chan_entry {
 }
 
 macro_rules! remove_channel {
-       ($self: expr, $channel_state: expr, $entry: expr) => {
+       ($self: expr, $entry: expr) => {
                {
                        let channel = $entry.remove_entry().1;
                        update_maps_on_chan_removal!($self, channel);
@@ -1919,7 +1919,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                                let (result, is_permanent) =
                                                        handle_monitor_update_res!(self, update_res, chan_entry.get_mut(), RAACommitmentOrder::CommitmentFirst, chan_entry.key(), NO_UPDATE);
                                                if is_permanent {
-                                                       remove_channel!(self, channel_state, chan_entry);
+                                                       remove_channel!(self, chan_entry);
                                                        break result;
                                                }
                                        }
@@ -1930,7 +1930,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                        });
 
                                        if chan_entry.get().is_shutdown() {
-                                               let channel = remove_channel!(self, channel_state, chan_entry);
+                                               let channel = remove_channel!(self, chan_entry);
                                                if let Ok(channel_update) = self.get_channel_update_for_broadcast(&channel) {
                                                        channel_state.pending_msg_events.push(events::MessageSendEvent::BroadcastChannelUpdate {
                                                                msg: channel_update
@@ -2031,7 +2031,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                } else {
                                        self.issue_channel_close_events(chan.get(),ClosureReason::HolderForceClosed);
                                }
-                               remove_channel!(self, channel_state, chan)
+                               remove_channel!(self, chan)
                        } else {
                                return Err(APIError::ChannelUnavailable{err: "No such channel".to_owned()});
                        }
@@ -2317,7 +2317,14 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                                Some((_cp_id, chan_id)) => Some(chan_id.clone()),
                                        };
                                        let chan_update_opt = if let Some(forwarding_id) = forwarding_id_opt {
-                                               let chan = channel_state.by_id.get_mut(&forwarding_id).unwrap();
+                                               let chan = match channel_state.by_id.get_mut(&forwarding_id) {
+                                                       None => {
+                                                               // Channel was removed. The short_to_chan_info and by_id maps have
+                                                               // no consistency guarantees.
+                                                               break Some(("Don't have available channel for forwarding as requested.", 0x4000 | 10, None));
+                                                       },
+                                                       Some(chan) => chan
+                                               };
                                                if !chan.should_announce() && !self.default_configuration.accept_forwards_to_priv_channels {
                                                        // Note that the behavior here should be identical to the above block - we
                                                        // should NOT reveal the existence or non-existence of a private channel if
@@ -2506,7 +2513,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                                        payment_secret: payment_secret.clone(),
                                                        payment_params: payment_params.clone(),
                                                }, onion_packet, &self.logger),
-                                       channel_state, chan)
+                                               chan)
                                } {
                                        Some((update_add, commitment_signed, monitor_update)) => {
                                                let update_err = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), monitor_update);
@@ -2544,7 +2551,12 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                        },
                                        None => { },
                                }
-                       } else { unreachable!(); }
+                       } else {
+                               // The channel was likely removed after we fetched the id from the
+                               // `short_to_chan_info` map, but before we successfully locked the `by_id` map.
+                               // This can occur as no consistency guarantees exists between the two maps.
+                               return Err(APIError::ChannelUnavailable{err: "No channel available with first hop!".to_owned()});
+                       }
                        return Ok(());
                };
 
@@ -3133,9 +3145,8 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                let mut channel_state_lock = self.channel_state.lock().unwrap();
                                let channel_state = &mut *channel_state_lock;
                                if short_chan_id != 0 {
-                                       let forward_chan_id = match self.short_to_chan_info.read().unwrap().get(&short_chan_id) {
-                                               Some((_cp_id, chan_id)) => chan_id.clone(),
-                                               None => {
+                                       macro_rules! forwarding_channel_not_found {
+                                               () => {
                                                        for forward_info in pending_forwards.drain(..) {
                                                                match forward_info {
                                                                        HTLCForwardInfo::AddHTLC { prev_short_channel_id, prev_htlc_id, forward_info: PendingHTLCInfo {
@@ -3222,136 +3233,146 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                                                        }
                                                                }
                                                        }
+                                               }
+                                       }
+                                       let forward_chan_id = match self.short_to_chan_info.read().unwrap().get(&short_chan_id) {
+                                               Some((_cp_id, chan_id)) => chan_id.clone(),
+                                               None => {
+                                                       forwarding_channel_not_found!();
                                                        continue;
                                                }
                                        };
-                                       if let hash_map::Entry::Occupied(mut chan) = channel_state.by_id.entry(forward_chan_id) {
-                                               let mut add_htlc_msgs = Vec::new();
-                                               let mut fail_htlc_msgs = Vec::new();
-                                               for forward_info in pending_forwards.drain(..) {
-                                                       match forward_info {
-                                                               HTLCForwardInfo::AddHTLC { prev_short_channel_id, prev_htlc_id, forward_info: PendingHTLCInfo {
-                                                                               routing: PendingHTLCRouting::Forward {
-                                                                                       onion_packet, ..
-                                                                               }, incoming_shared_secret, payment_hash, amt_to_forward, outgoing_cltv_value },
-                                                                               prev_funding_outpoint } => {
-                                                                       log_trace!(self.logger, "Adding HTLC from short id {} with payment_hash {} to channel with short id {} after delay", prev_short_channel_id, log_bytes!(payment_hash.0), short_chan_id);
-                                                                       let htlc_source = HTLCSource::PreviousHopData(HTLCPreviousHopData {
-                                                                               short_channel_id: prev_short_channel_id,
-                                                                               outpoint: prev_funding_outpoint,
-                                                                               htlc_id: prev_htlc_id,
-                                                                               incoming_packet_shared_secret: incoming_shared_secret,
-                                                                               // Phantom payments are only PendingHTLCRouting::Receive.
-                                                                               phantom_shared_secret: None,
-                                                                       });
-                                                                       match chan.get_mut().send_htlc(amt_to_forward, payment_hash, outgoing_cltv_value, htlc_source.clone(), onion_packet, &self.logger) {
-                                                                               Err(e) => {
-                                                                                       if let ChannelError::Ignore(msg) = e {
-                                                                                               log_trace!(self.logger, "Failed to forward HTLC with payment_hash {}: {}", log_bytes!(payment_hash.0), msg);
-                                                                                       } else {
-                                                                                               panic!("Stated return value requirements in send_htlc() were not met");
-                                                                                       }
-                                                                                       let (failure_code, data) = self.get_htlc_temp_fail_err_and_data(0x1000|7, short_chan_id, chan.get());
-                                                                                       failed_forwards.push((htlc_source, payment_hash,
-                                                                                               HTLCFailReason::Reason { failure_code, data },
-                                                                                               HTLCDestination::NextHopChannel { node_id: Some(chan.get().get_counterparty_node_id()), channel_id: forward_chan_id }
-                                                                                       ));
-                                                                                       continue;
-                                                                               },
-                                                                               Ok(update_add) => {
-                                                                                       match update_add {
-                                                                                               Some(msg) => { add_htlc_msgs.push(msg); },
-                                                                                               None => {
-                                                                                                       // Nothing to do here...we're waiting on a remote
-                                                                                                       // revoke_and_ack before we can add anymore HTLCs. The Channel
-                                                                                                       // will automatically handle building the update_add_htlc and
-                                                                                                       // commitment_signed messages when we can.
-                                                                                                       // TODO: Do some kind of timer to set the channel as !is_live()
-                                                                                                       // as we don't really want others relying on us relaying through
-                                                                                                       // this channel currently :/.
+                                       match channel_state.by_id.entry(forward_chan_id) {
+                                               hash_map::Entry::Vacant(_) => {
+                                                       forwarding_channel_not_found!();
+                                                       continue;
+                                               },
+                                               hash_map::Entry::Occupied(mut chan) => {
+                                                       let mut add_htlc_msgs = Vec::new();
+                                                       let mut fail_htlc_msgs = Vec::new();
+                                                       for forward_info in pending_forwards.drain(..) {
+                                                               match forward_info {
+                                                                       HTLCForwardInfo::AddHTLC { prev_short_channel_id, prev_htlc_id, forward_info: PendingHTLCInfo {
+                                                                                       routing: PendingHTLCRouting::Forward {
+                                                                                               onion_packet, ..
+                                                                                       }, incoming_shared_secret, payment_hash, amt_to_forward, outgoing_cltv_value },
+                                                                                       prev_funding_outpoint } => {
+                                                                               log_trace!(self.logger, "Adding HTLC from short id {} with payment_hash {} to channel with short id {} after delay", prev_short_channel_id, log_bytes!(payment_hash.0), short_chan_id);
+                                                                               let htlc_source = HTLCSource::PreviousHopData(HTLCPreviousHopData {
+                                                                                       short_channel_id: prev_short_channel_id,
+                                                                                       outpoint: prev_funding_outpoint,
+                                                                                       htlc_id: prev_htlc_id,
+                                                                                       incoming_packet_shared_secret: incoming_shared_secret,
+                                                                                       // Phantom payments are only PendingHTLCRouting::Receive.
+                                                                                       phantom_shared_secret: None,
+                                                                               });
+                                                                               match chan.get_mut().send_htlc(amt_to_forward, payment_hash, outgoing_cltv_value, htlc_source.clone(), onion_packet, &self.logger) {
+                                                                                       Err(e) => {
+                                                                                               if let ChannelError::Ignore(msg) = e {
+                                                                                                       log_trace!(self.logger, "Failed to forward HTLC with payment_hash {}: {}", log_bytes!(payment_hash.0), msg);
+                                                                                               } else {
+                                                                                                       panic!("Stated return value requirements in send_htlc() were not met");
+                                                                                               }
+                                                                                               let (failure_code, data) = self.get_htlc_temp_fail_err_and_data(0x1000|7, short_chan_id, chan.get());
+                                                                                               failed_forwards.push((htlc_source, payment_hash,
+                                                                                                       HTLCFailReason::Reason { failure_code, data },
+                                                                                                       HTLCDestination::NextHopChannel { node_id: Some(chan.get().get_counterparty_node_id()), channel_id: forward_chan_id }
+                                                                                               ));
+                                                                                               continue;
+                                                                                       },
+                                                                                       Ok(update_add) => {
+                                                                                               match update_add {
+                                                                                                       Some(msg) => { add_htlc_msgs.push(msg); },
+                                                                                                       None => {
+                                                                                                               // Nothing to do here...we're waiting on a remote
+                                                                                                               // revoke_and_ack before we can add anymore HTLCs. The Channel
+                                                                                                               // will automatically handle building the update_add_htlc and
+                                                                                                               // commitment_signed messages when we can.
+                                                                                                               // TODO: Do some kind of timer to set the channel as !is_live()
+                                                                                                               // as we don't really want others relying on us relaying through
+                                                                                                               // this channel currently :/.
+                                                                                                       }
                                                                                                }
                                                                                        }
                                                                                }
-                                                                       }
-                                                               },
-                                                               HTLCForwardInfo::AddHTLC { .. } => {
-                                                                       panic!("short_channel_id != 0 should imply any pending_forward entries are of type Forward");
-                                                               },
-                                                               HTLCForwardInfo::FailHTLC { htlc_id, err_packet } => {
-                                                                       log_trace!(self.logger, "Failing HTLC back to channel with short id {} (backward HTLC ID {}) after delay", short_chan_id, htlc_id);
-                                                                       match chan.get_mut().get_update_fail_htlc(htlc_id, err_packet, &self.logger) {
-                                                                               Err(e) => {
-                                                                                       if let ChannelError::Ignore(msg) = e {
-                                                                                               log_trace!(self.logger, "Failed to fail HTLC with ID {} backwards to short_id {}: {}", htlc_id, short_chan_id, msg);
-                                                                                       } else {
-                                                                                               panic!("Stated return value requirements in get_update_fail_htlc() were not met");
+                                                                       },
+                                                                       HTLCForwardInfo::AddHTLC { .. } => {
+                                                                               panic!("short_channel_id != 0 should imply any pending_forward entries are of type Forward");
+                                                                       },
+                                                                       HTLCForwardInfo::FailHTLC { htlc_id, err_packet } => {
+                                                                               log_trace!(self.logger, "Failing HTLC back to channel with short id {} (backward HTLC ID {}) after delay", short_chan_id, htlc_id);
+                                                                               match chan.get_mut().get_update_fail_htlc(htlc_id, err_packet, &self.logger) {
+                                                                                       Err(e) => {
+                                                                                               if let ChannelError::Ignore(msg) = e {
+                                                                                                       log_trace!(self.logger, "Failed to fail HTLC with ID {} backwards to short_id {}: {}", htlc_id, short_chan_id, msg);
+                                                                                               } else {
+                                                                                                       panic!("Stated return value requirements in get_update_fail_htlc() were not met");
+                                                                                               }
+                                                                                               // fail-backs are best-effort, we probably already have one
+                                                                                               // pending, and if not that's OK, if not, the channel is on
+                                                                                               // the chain and sending the HTLC-Timeout is their problem.
+                                                                                               continue;
+                                                                                       },
+                                                                                       Ok(Some(msg)) => { fail_htlc_msgs.push(msg); },
+                                                                                       Ok(None) => {
+                                                                                               // Nothing to do here...we're waiting on a remote
+                                                                                               // revoke_and_ack before we can update the commitment
+                                                                                               // transaction. The Channel will automatically handle
+                                                                                               // building the update_fail_htlc and commitment_signed
+                                                                                               // messages when we can.
+                                                                                               // We don't need any kind of timer here as they should fail
+                                                                                               // the channel onto the chain if they can't get our
+                                                                                               // update_fail_htlc in time, it's not our problem.
                                                                                        }
-                                                                                       // fail-backs are best-effort, we probably already have one
-                                                                                       // pending, and if not that's OK, if not, the channel is on
-                                                                                       // the chain and sending the HTLC-Timeout is their problem.
-                                                                                       continue;
-                                                                               },
-                                                                               Ok(Some(msg)) => { fail_htlc_msgs.push(msg); },
-                                                                               Ok(None) => {
-                                                                                       // Nothing to do here...we're waiting on a remote
-                                                                                       // revoke_and_ack before we can update the commitment
-                                                                                       // transaction. The Channel will automatically handle
-                                                                                       // building the update_fail_htlc and commitment_signed
-                                                                                       // messages when we can.
-                                                                                       // We don't need any kind of timer here as they should fail
-                                                                                       // the channel onto the chain if they can't get our
-                                                                                       // update_fail_htlc in time, it's not our problem.
                                                                                }
-                                                                       }
-                                                               },
+                                                                       },
+                                                               }
                                                        }
-                                               }
 
-                                               if !add_htlc_msgs.is_empty() || !fail_htlc_msgs.is_empty() {
-                                                       let (commitment_msg, monitor_update) = match chan.get_mut().send_commitment(&self.logger) {
-                                                               Ok(res) => res,
-                                                               Err(e) => {
-                                                                       // We surely failed send_commitment due to bad keys, in that case
-                                                                       // close channel and then send error message to peer.
-                                                                       let counterparty_node_id = chan.get().get_counterparty_node_id();
-                                                                       let err: Result<(), _>  = match e {
-                                                                               ChannelError::Ignore(_) | ChannelError::Warn(_) => {
-                                                                                       panic!("Stated return value requirements in send_commitment() were not met");
-                                                                               }
-                                                                               ChannelError::Close(msg) => {
-                                                                                       log_trace!(self.logger, "Closing channel {} due to Close-required error: {}", log_bytes!(chan.key()[..]), msg);
-                                                                                       let mut channel = remove_channel!(self, channel_state, chan);
-                                                                                       // ChannelClosed event is generated by handle_error for us.
-                                                                                       Err(MsgHandleErrInternal::from_finish_shutdown(msg, channel.channel_id(), channel.get_user_id(), channel.force_shutdown(true), self.get_channel_update_for_broadcast(&channel).ok()))
-                                                                               },
-                                                                       };
-                                                                       handle_errors.push((counterparty_node_id, err));
-                                                                       continue;
-                                                               }
-                                                       };
-                                                       match self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), monitor_update) {
-                                                               ChannelMonitorUpdateStatus::Completed => {},
-                                                               e => {
-                                                                       handle_errors.push((chan.get().get_counterparty_node_id(), handle_monitor_update_res!(self, e, chan, RAACommitmentOrder::CommitmentFirst, false, true)));
-                                                                       continue;
+                                                       if !add_htlc_msgs.is_empty() || !fail_htlc_msgs.is_empty() {
+                                                               let (commitment_msg, monitor_update) = match chan.get_mut().send_commitment(&self.logger) {
+                                                                       Ok(res) => res,
+                                                                       Err(e) => {
+                                                                               // We surely failed send_commitment due to bad keys, in that case
+                                                                               // close channel and then send error message to peer.
+                                                                               let counterparty_node_id = chan.get().get_counterparty_node_id();
+                                                                               let err: Result<(), _>  = match e {
+                                                                                       ChannelError::Ignore(_) | ChannelError::Warn(_) => {
+                                                                                               panic!("Stated return value requirements in send_commitment() were not met");
+                                                                                       }
+                                                                                       ChannelError::Close(msg) => {
+                                                                                               log_trace!(self.logger, "Closing channel {} due to Close-required error: {}", log_bytes!(chan.key()[..]), msg);
+                                                                                               let mut channel = remove_channel!(self, chan);
+                                                                                               // ChannelClosed event is generated by handle_error for us.
+                                                                                               Err(MsgHandleErrInternal::from_finish_shutdown(msg, channel.channel_id(), channel.get_user_id(), channel.force_shutdown(true), self.get_channel_update_for_broadcast(&channel).ok()))
+                                                                                       },
+                                                                               };
+                                                                               handle_errors.push((counterparty_node_id, err));
+                                                                               continue;
+                                                                       }
+                                                               };
+                                                               match self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), monitor_update) {
+                                                                       ChannelMonitorUpdateStatus::Completed => {},
+                                                                       e => {
+                                                                               handle_errors.push((chan.get().get_counterparty_node_id(), handle_monitor_update_res!(self, e, chan, RAACommitmentOrder::CommitmentFirst, false, true)));
+                                                                               continue;
+                                                                       }
                                                                }
+                                                               log_debug!(self.logger, "Forwarding HTLCs resulted in a commitment update with {} HTLCs added and {} HTLCs failed for channel {}",
+                                                                       add_htlc_msgs.len(), fail_htlc_msgs.len(), log_bytes!(chan.get().channel_id()));
+                                                               channel_state.pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
+                                                                       node_id: chan.get().get_counterparty_node_id(),
+                                                                       updates: msgs::CommitmentUpdate {
+                                                                               update_add_htlcs: add_htlc_msgs,
+                                                                               update_fulfill_htlcs: Vec::new(),
+                                                                               update_fail_htlcs: fail_htlc_msgs,
+                                                                               update_fail_malformed_htlcs: Vec::new(),
+                                                                               update_fee: None,
+                                                                               commitment_signed: commitment_msg,
+                                                                       },
+                                                               });
                                                        }
-                                                       log_debug!(self.logger, "Forwarding HTLCs resulted in a commitment update with {} HTLCs added and {} HTLCs failed for channel {}",
-                                                               add_htlc_msgs.len(), fail_htlc_msgs.len(), log_bytes!(chan.get().channel_id()));
-                                                       channel_state.pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
-                                                               node_id: chan.get().get_counterparty_node_id(),
-                                                               updates: msgs::CommitmentUpdate {
-                                                                       update_add_htlcs: add_htlc_msgs,
-                                                                       update_fulfill_htlcs: Vec::new(),
-                                                                       update_fail_htlcs: fail_htlc_msgs,
-                                                                       update_fail_malformed_htlcs: Vec::new(),
-                                                                       update_fee: None,
-                                                                       commitment_signed: commitment_msg,
-                                                               },
-                                                       });
                                                }
-                                       } else {
-                                               unreachable!();
                                        }
                                } else {
                                        for forward_info in pending_forwards.drain(..) {
@@ -4310,7 +4331,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                        return ClaimFundsFromHop::MonitorUpdateFail(counterparty_node_id, res, None);
                                },
                        }
-               } else { unreachable!(); }
+               } else { return ClaimFundsFromHop::PrevHopForceClosed }
        }
 
        fn finalize_claims(&self, mut sources: Vec<HTLCSource>) {
@@ -4558,7 +4579,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                                }
                                        };
                                        channel_state.pending_msg_events.push(send_msg_err_event);
-                                       let _ = remove_channel!(self, channel_state, channel);
+                                       let _ = remove_channel!(self, channel);
                                        return Err(APIError::APIMisuseError { err: "Please use accept_inbound_channel_from_trusted_peer_0conf to accept channels with zero confirmations.".to_owned() });
                                }
 
@@ -4638,7 +4659,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                        if chan.get().get_counterparty_node_id() != *counterparty_node_id {
                                                return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.temporary_channel_id));
                                        }
-                                       try_chan_entry!(self, chan.get_mut().accept_channel(&msg, &self.default_configuration.channel_handshake_limits, &their_features), channel_state, chan);
+                                       try_chan_entry!(self, chan.get_mut().accept_channel(&msg, &self.default_configuration.channel_handshake_limits, &their_features), chan);
                                        (chan.get().get_value_satoshis(), chan.get().get_funding_redeemscript().to_v0_p2wsh(), chan.get().get_user_id())
                                },
                                hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.temporary_channel_id))
@@ -4665,7 +4686,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                        if chan.get().get_counterparty_node_id() != *counterparty_node_id {
                                                return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.temporary_channel_id));
                                        }
-                                       (try_chan_entry!(self, chan.get_mut().funding_created(msg, best_block, &self.logger), channel_state, chan), chan.remove())
+                                       (try_chan_entry!(self, chan.get_mut().funding_created(msg, best_block, &self.logger), chan), chan.remove())
                                },
                                hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.temporary_channel_id))
                        }
@@ -4738,7 +4759,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                        }
                                        let (monitor, funding_tx, channel_ready) = match chan.get_mut().funding_signed(&msg, best_block, &self.logger) {
                                                Ok(update) => update,
-                                               Err(e) => try_chan_entry!(self, Err(e), channel_state, chan),
+                                               Err(e) => try_chan_entry!(self, Err(e), chan),
                                        };
                                        match self.chain_monitor.watch_channel(chan.get().get_funding_txo().unwrap(), monitor) {
                                                ChannelMonitorUpdateStatus::Completed => {},
@@ -4777,7 +4798,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                        return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
                                }
                                let announcement_sigs_opt = try_chan_entry!(self, chan.get_mut().channel_ready(&msg, self.get_our_node_id(),
-                                       self.genesis_hash.clone(), &self.best_block.read().unwrap(), &self.logger), channel_state, chan);
+                                       self.genesis_hash.clone(), &self.best_block.read().unwrap(), &self.logger), chan);
                                if let Some(announcement_sigs) = announcement_sigs_opt {
                                        log_trace!(self.logger, "Sending announcement_signatures for channel {}", log_bytes!(chan.get().channel_id()));
                                        channel_state.pending_msg_events.push(events::MessageSendEvent::SendAnnouncementSignatures {
@@ -4825,7 +4846,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                                        if chan_entry.get().sent_shutdown() { " after we initiated shutdown" } else { "" });
                                        }
 
-                                       let (shutdown, monitor_update, htlcs) = try_chan_entry!(self, chan_entry.get_mut().shutdown(&self.keys_manager, &their_features, &msg), channel_state, chan_entry);
+                                       let (shutdown, monitor_update, htlcs) = try_chan_entry!(self, chan_entry.get_mut().shutdown(&self.keys_manager, &their_features, &msg), chan_entry);
                                        dropped_htlcs = htlcs;
 
                                        // Update the monitor with the shutdown script if necessary.
@@ -4834,7 +4855,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                                let (result, is_permanent) =
                                                        handle_monitor_update_res!(self, update_res, chan_entry.get_mut(), RAACommitmentOrder::CommitmentFirst, chan_entry.key(), NO_UPDATE);
                                                if is_permanent {
-                                                       remove_channel!(self, channel_state, chan_entry);
+                                                       remove_channel!(self, chan_entry);
                                                        break result;
                                                }
                                        }
@@ -4869,7 +4890,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                        if chan_entry.get().get_counterparty_node_id() != *counterparty_node_id {
                                                return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
                                        }
-                                       let (closing_signed, tx) = try_chan_entry!(self, chan_entry.get_mut().closing_signed(&self.fee_estimator, &msg), channel_state, chan_entry);
+                                       let (closing_signed, tx) = try_chan_entry!(self, chan_entry.get_mut().closing_signed(&self.fee_estimator, &msg), chan_entry);
                                        if let Some(msg) = closing_signed {
                                                channel_state.pending_msg_events.push(events::MessageSendEvent::SendClosingSigned {
                                                        node_id: counterparty_node_id.clone(),
@@ -4882,7 +4903,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                                // also implies there are no pending HTLCs left on the channel, so we can
                                                // fully delete it from tracking (the channel monitor is still around to
                                                // watch for old state broadcasts)!
-                                               (tx, Some(remove_channel!(self, channel_state, chan_entry)))
+                                               (tx, Some(remove_channel!(self, chan_entry)))
                                        } else { (tx, None) }
                                },
                                hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
@@ -4946,7 +4967,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                                _ => pending_forward_info
                                        }
                                };
-                               try_chan_entry!(self, chan.get_mut().update_add_htlc(&msg, pending_forward_info, create_pending_htlc_status, &self.logger), channel_state, chan);
+                               try_chan_entry!(self, chan.get_mut().update_add_htlc(&msg, pending_forward_info, create_pending_htlc_status, &self.logger), chan);
                        },
                        hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
                }
@@ -4962,7 +4983,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                        if chan.get().get_counterparty_node_id() != *counterparty_node_id {
                                                return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
                                        }
-                                       try_chan_entry!(self, chan.get_mut().update_fulfill_htlc(&msg), channel_state, chan)
+                                       try_chan_entry!(self, chan.get_mut().update_fulfill_htlc(&msg), chan)
                                },
                                hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
                        }
@@ -4979,7 +5000,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                if chan.get().get_counterparty_node_id() != *counterparty_node_id {
                                        return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
                                }
-                               try_chan_entry!(self, chan.get_mut().update_fail_htlc(&msg, HTLCFailReason::LightningError { err: msg.reason.clone() }), channel_state, chan);
+                               try_chan_entry!(self, chan.get_mut().update_fail_htlc(&msg, HTLCFailReason::LightningError { err: msg.reason.clone() }), chan);
                        },
                        hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
                }
@@ -4996,9 +5017,9 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                }
                                if (msg.failure_code & 0x8000) == 0 {
                                        let chan_err: ChannelError = ChannelError::Close("Got update_fail_malformed_htlc with BADONION not set".to_owned());
-                                       try_chan_entry!(self, Err(chan_err), channel_state, chan);
+                                       try_chan_entry!(self, Err(chan_err), chan);
                                }
-                               try_chan_entry!(self, chan.get_mut().update_fail_malformed_htlc(&msg, HTLCFailReason::Reason { failure_code: msg.failure_code, data: Vec::new() }), channel_state, chan);
+                               try_chan_entry!(self, chan.get_mut().update_fail_malformed_htlc(&msg, HTLCFailReason::Reason { failure_code: msg.failure_code, data: Vec::new() }), chan);
                                Ok(())
                        },
                        hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
@@ -5015,11 +5036,11 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                }
                                let (revoke_and_ack, commitment_signed, monitor_update) =
                                        match chan.get_mut().commitment_signed(&msg, &self.logger) {
-                                               Err((None, e)) => try_chan_entry!(self, Err(e), channel_state, chan),
+                                               Err((None, e)) => try_chan_entry!(self, Err(e), chan),
                                                Err((Some(update), e)) => {
                                                        assert!(chan.get().is_awaiting_monitor_update());
                                                        let _ = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), update);
-                                                       try_chan_entry!(self, Err(e), channel_state, chan);
+                                                       try_chan_entry!(self, Err(e), chan);
                                                        unreachable!();
                                                },
                                                Ok(res) => res
@@ -5102,7 +5123,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                        }
                                        let was_paused_for_mon_update = chan.get().is_awaiting_monitor_update();
                                        let raa_updates = break_chan_entry!(self,
-                                               chan.get_mut().revoke_and_ack(&msg, &self.logger), channel_state, chan);
+                                               chan.get_mut().revoke_and_ack(&msg, &self.logger), chan);
                                        htlcs_to_fail = raa_updates.holding_cell_failed_htlcs;
                                        let update_res = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), raa_updates.monitor_update);
                                        if was_paused_for_mon_update {
@@ -5162,7 +5183,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                if chan.get().get_counterparty_node_id() != *counterparty_node_id {
                                        return Err(MsgHandleErrInternal::send_err_msg_no_close("Got a message for a channel from the wrong node!".to_owned(), msg.channel_id));
                                }
-                               try_chan_entry!(self, chan.get_mut().update_fee(&self.fee_estimator, &msg), channel_state, chan);
+                               try_chan_entry!(self, chan.get_mut().update_fee(&self.fee_estimator, &msg), chan);
                        },
                        hash_map::Entry::Vacant(_) => return Err(MsgHandleErrInternal::send_err_msg_no_close("Failed to find corresponding channel".to_owned(), msg.channel_id))
                }
@@ -5184,7 +5205,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
 
                                channel_state.pending_msg_events.push(events::MessageSendEvent::BroadcastChannelAnnouncement {
                                        msg: try_chan_entry!(self, chan.get_mut().announcement_signatures(
-                                               self.get_our_node_id(), self.genesis_hash.clone(), self.best_block.read().unwrap().height(), msg), channel_state, chan),
+                                               self.get_our_node_id(), self.genesis_hash.clone(), self.best_block.read().unwrap().height(), msg), chan),
                                        // Note that announcement_signatures fails if the channel cannot be announced,
                                        // so get_channel_update_for_broadcast will never fail by the time we get here.
                                        update_msg: self.get_channel_update_for_broadcast(chan.get()).unwrap(),
@@ -5223,10 +5244,10 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                        return Ok(NotifyOption::SkipPersist);
                                } else {
                                        log_debug!(self.logger, "Received channel_update for channel {}.", log_bytes!(chan_id));
-                                       try_chan_entry!(self, chan.get_mut().channel_update(&msg), channel_state, chan);
+                                       try_chan_entry!(self, chan.get_mut().channel_update(&msg), chan);
                                }
                        },
-                       hash_map::Entry::Vacant(_) => unreachable!()
+                       hash_map::Entry::Vacant(_) => return Ok(NotifyOption::SkipPersist)
                }
                Ok(NotifyOption::DoPersist)
        }
@@ -5248,7 +5269,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                        // add-HTLCs on disconnect, we may be handed HTLCs to fail backwards here.
                                        let responses = try_chan_entry!(self, chan.get_mut().channel_reestablish(
                                                msg, &self.logger, self.our_network_pubkey.clone(), self.genesis_hash,
-                                               &*self.best_block.read().unwrap()), channel_state, chan);
+                                               &*self.best_block.read().unwrap()), chan);
                                        let mut channel_update = None;
                                        if let Some(msg) = responses.shutdown_msg {
                                                channel_state.pending_msg_events.push(events::MessageSendEvent::SendShutdown {
@@ -5312,7 +5333,7 @@ impl<M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelManager<M, T, K, F
                                                let by_id = &mut channel_state.by_id;
                                                let pending_msg_events = &mut channel_state.pending_msg_events;
                                                if let hash_map::Entry::Occupied(chan_entry) = by_id.entry(funding_outpoint.to_channel_id()) {
-                                                       let mut chan = remove_channel!(self, channel_state, chan_entry);
+                                                       let mut chan = remove_channel!(self, chan_entry);
                                                        failed_channels.push(chan.force_shutdown(false));
                                                        if let Ok(update) = self.get_channel_update_for_broadcast(&chan) {
                                                                pending_msg_events.push(events::MessageSendEvent::BroadcastChannelUpdate {