Clean up `compute_fees` and add a saturating variant
[rust-lightning] / lightning / src / ln / channelmanager.rs
index 43d1806f90bbbdeba35f08389b084e7d325d06d4..d08f8da55584331293cc40585188c071f93bf906 100644 (file)
@@ -26,12 +26,10 @@ use bitcoin::network::constants::Network;
 
 use bitcoin::hashes::Hash;
 use bitcoin::hashes::sha256::Hash as Sha256;
-use bitcoin::hashes::sha256d::Hash as Sha256dHash;
 use bitcoin::hash_types::{BlockHash, Txid};
 
 use bitcoin::secp256k1::{SecretKey,PublicKey};
 use bitcoin::secp256k1::Secp256k1;
-use bitcoin::secp256k1::ecdh::SharedSecret;
 use bitcoin::{LockTime, secp256k1, Sequence};
 
 use crate::chain;
@@ -577,13 +575,13 @@ pub type SimpleRefChannelManager<'a, 'b, 'c, 'd, 'e, 'f, 'g, 'h, M, T, F, L> = C
 //  |   |
 //  |   |__`pending_intercepted_htlcs`
 //  |
-//  |__`pending_inbound_payments`
+//  |__`per_peer_state`
 //  |   |
-//  |   |__`claimable_payments`
-//  |   |
-//  |   |__`pending_outbound_payments` // This field's struct contains a map of pending outbounds
+//  |   |__`pending_inbound_payments`
+//  |       |
+//  |       |__`claimable_payments`
 //  |       |
-//  |       |__`per_peer_state`
+//  |       |__`pending_outbound_payments` // This field's struct contains a map of pending outbounds
 //  |           |
 //  |           |__`peer_state`
 //  |               |
@@ -721,7 +719,6 @@ where
        #[cfg(not(test))]
        short_to_chan_info: FairRwLock<HashMap<u64, (PublicKey, [u8; 32])>>,
 
-       our_network_key: SecretKey,
        our_network_pubkey: PublicKey,
 
        inbound_payment_key: inbound_payment::ExpandedKey,
@@ -1153,12 +1150,12 @@ macro_rules! handle_error {
                match $internal {
                        Ok(msg) => Ok(msg),
                        Err(MsgHandleErrInternal { err, chan_id, shutdown_finish }) => {
-                               #[cfg(debug_assertions)]
+                               #[cfg(any(feature = "_test_utils", test))]
                                {
                                        // In testing, ensure there are no deadlocks where the lock is already held upon
                                        // entering the macro.
-                                       assert!($self.pending_events.try_lock().is_ok());
-                                       assert!($self.per_peer_state.try_write().is_ok());
+                                       debug_assert!($self.pending_events.try_lock().is_ok());
+                                       debug_assert!($self.per_peer_state.try_write().is_ok());
                                }
 
                                let mut msg_events = Vec::with_capacity(2);
@@ -1193,7 +1190,7 @@ macro_rules! handle_error {
                                                let mut peer_state = peer_state_mutex.lock().unwrap();
                                                peer_state.pending_msg_events.append(&mut msg_events);
                                        }
-                                       #[cfg(debug_assertions)]
+                                       #[cfg(any(feature = "_test_utils", test))]
                                        {
                                                if let None = per_peer_state.get(&$counterparty_node_id) {
                                                        // This shouldn't occour in tests unless an unkown counterparty_node_id
@@ -1206,10 +1203,10 @@ macro_rules! handle_error {
                                                                => {
                                                                        assert_eq!(*data, expected_error_str);
                                                                        if let Some((err_channel_id, _user_channel_id)) = chan_id {
-                                                                               assert_eq!(*channel_id, err_channel_id);
+                                                                               debug_assert_eq!(*channel_id, err_channel_id);
                                                                        }
                                                                }
-                                                               _ => panic!("Unexpected event"),
+                                                               _ => debug_assert!(false, "Unexpected event"),
                                                        }
                                                }
                                        }
@@ -1457,8 +1454,7 @@ where
                        id_to_peer: Mutex::new(HashMap::new()),
                        short_to_chan_info: FairRwLock::new(HashMap::new()),
 
-                       our_network_key: node_signer.get_node_secret(Recipient::Node).unwrap(),
-                       our_network_pubkey: PublicKey::from_secret_key(&secp_ctx, &node_signer.get_node_secret(Recipient::Node).unwrap()),
+                       our_network_pubkey: node_signer.get_node_id(Recipient::Node).unwrap(),
                        secp_ctx,
 
                        inbound_payment_key: expanded_inbound_key,
@@ -1709,7 +1705,7 @@ where
 
                                        // Update the monitor with the shutdown script if necessary.
                                        if let Some(monitor_update) = monitor_update {
-                                               let update_res = self.chain_monitor.update_channel(chan_entry.get().get_funding_txo().unwrap(), monitor_update);
+                                               let update_res = self.chain_monitor.update_channel(chan_entry.get().get_funding_txo().unwrap(), &monitor_update);
                                                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 {
@@ -1807,7 +1803,7 @@ where
                        // force-closing. The monitor update on the required in-memory copy should broadcast
                        // the latest local state, which is the best we can do anyway. Thus, it is safe to
                        // ignore the result here.
-                       let _ = self.chain_monitor.update_channel(funding_txo, monitor_update);
+                       let _ = self.chain_monitor.update_channel(funding_txo, &monitor_update);
                }
        }
 
@@ -2017,7 +2013,9 @@ where
                        return_malformed_err!("invalid ephemeral pubkey", 0x8000 | 0x4000 | 6);
                }
 
-               let shared_secret = SharedSecret::new(&msg.onion_routing_packet.public_key.unwrap(), &self.our_network_key).secret_bytes();
+               let shared_secret = self.node_signer.ecdh(
+                       Recipient::Node, &msg.onion_routing_packet.public_key.unwrap(), None
+               ).unwrap().secret_bytes();
 
                if msg.onion_routing_packet.version != 0 {
                        //TODO: Spec doesn't indicate if we should only hash hop_data here (and in other
@@ -2266,7 +2264,7 @@ where
        }
        fn get_channel_update_for_onion(&self, short_channel_id: u64, chan: &Channel<<SP::Target as SignerProvider>::Signer>) -> Result<msgs::ChannelUpdate, LightningError> {
                log_trace!(self.logger, "Generating channel update for channel {}", log_bytes!(chan.channel_id()));
-               let were_node_one = PublicKey::from_secret_key(&self.secp_ctx, &self.our_network_key).serialize()[..] < chan.get_counterparty_node_id().serialize()[..];
+               let were_node_one = self.our_network_pubkey.serialize()[..] < chan.get_counterparty_node_id().serialize()[..];
 
                let unsigned = msgs::UnsignedChannelUpdate {
                        chain_hash: self.genesis_hash,
@@ -2280,9 +2278,11 @@ where
                        fee_proportional_millionths: chan.get_fee_proportional_millionths(),
                        excess_data: Vec::new(),
                };
-
-               let msg_hash = Sha256dHash::hash(&unsigned.encode()[..]);
-               let sig = self.secp_ctx.sign_ecdsa(&hash_to_message!(&msg_hash[..]), &self.our_network_key);
+               // Panic on failure to signal LDK should be restarted to retry signing the `ChannelUpdate`.
+               // If we returned an error and the `node_signer` cannot provide a signature for whatever
+               // reason`, we wouldn't be able to receive inbound payments through the corresponding
+               // channel.
+               let sig = self.node_signer.sign_gossip_message(msgs::UnsignedGossipMessage::ChannelUpdate(&unsigned)).unwrap();
 
                Ok(msgs::ChannelUpdate {
                        signature: sig,
@@ -2336,7 +2336,7 @@ where
                                                chan)
                                } {
                                        Some((update_add, commitment_signed, monitor_update)) => {
-                                               let update_err = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), monitor_update);
+                                               let update_err = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), &monitor_update);
                                                let chan_id = chan.get().channel_id();
                                                match (update_err,
                                                        handle_monitor_update_res!(self, update_err, chan,
@@ -2923,9 +2923,9 @@ where
                                                                                        }
                                                                                }
                                                                                if let PendingHTLCRouting::Forward { onion_packet, .. } = routing {
-                                                                                       let phantom_secret_res = self.node_signer.get_node_secret(Recipient::PhantomNode);
-                                                                                       if phantom_secret_res.is_ok() && fake_scid::is_valid_phantom(&self.fake_scid_rand_bytes, short_chan_id, &self.genesis_hash) {
-                                                                                               let phantom_shared_secret = SharedSecret::new(&onion_packet.public_key.unwrap(), &phantom_secret_res.unwrap()).secret_bytes();
+                                                                                       let phantom_pubkey_res = self.node_signer.get_node_id(Recipient::PhantomNode);
+                                                                                       if phantom_pubkey_res.is_ok() && fake_scid::is_valid_phantom(&self.fake_scid_rand_bytes, short_chan_id, &self.genesis_hash) {
+                                                                                               let phantom_shared_secret = self.node_signer.ecdh(Recipient::PhantomNode, &onion_packet.public_key.unwrap(), None).unwrap().secret_bytes();
                                                                                                let next_hop = match onion_utils::decode_next_payment_hop(phantom_shared_secret, &onion_packet.hop_data, onion_packet.hmac, payment_hash) {
                                                                                                        Ok(res) => res,
                                                                                                        Err(onion_utils::OnionDecodeErr::Malformed { err_msg, err_code }) => {
@@ -3284,7 +3284,7 @@ where
                                BackgroundEvent::ClosingMonitorUpdate((funding_txo, update)) => {
                                        // The channel has already been closed, so no use bothering to care about the
                                        // monitor updating completing.
-                                       let _ = self.chain_monitor.update_channel(funding_txo, update);
+                                       let _ = self.chain_monitor.update_channel(funding_txo, &update);
                                },
                        }
                }
@@ -3565,14 +3565,17 @@ where
        /// Fails an HTLC backwards to the sender of it to us.
        /// Note that we do not assume that channels corresponding to failed HTLCs are still available.
        fn fail_htlc_backwards_internal(&self, source: &HTLCSource, payment_hash: &PaymentHash, onion_error: &HTLCFailReason, destination: HTLCDestination) {
-               #[cfg(debug_assertions)]
+               #[cfg(any(feature = "_test_utils", test))]
                {
                        // Ensure that no peer state channel storage lock is not held when calling this
                        // function.
                        // This ensures that future code doesn't introduce a lock_order requirement for
-                       // `forward_htlcs` to be locked after the `per_peer_state` locks, which calling this
-                       // function with the `per_peer_state` aquired would.
-                       assert!(self.per_peer_state.try_write().is_ok());
+                       // `forward_htlcs` to be locked after the `per_peer_state` peer locks, which calling
+                       // this function with any `per_peer_state` peer lock aquired would.
+                       let per_peer_state = self.per_peer_state.read().unwrap();
+                       for (_, peer) in per_peer_state.iter() {
+                               debug_assert!(peer.try_lock().is_ok());
+                       }
                }
 
                //TODO: There is a timing attack here where if a node fails an HTLC back to us they can
@@ -3807,7 +3810,7 @@ where
                                match chan.get_mut().get_update_fulfill_htlc_and_commit(prev_hop.htlc_id, payment_preimage, &self.logger) {
                                        Ok(msgs_monitor_option) => {
                                                if let UpdateFulfillCommitFetch::NewClaim { msgs, htlc_value_msat, monitor_update } = msgs_monitor_option {
-                                                       match self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), monitor_update) {
+                                                       match self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), &monitor_update) {
                                                                ChannelMonitorUpdateStatus::Completed => {},
                                                                e => {
                                                                        log_given_level!(self.logger, if e == ChannelMonitorUpdateStatus::PermanentFailure { Level::Error } else { Level::Debug },
@@ -3844,7 +3847,7 @@ where
                                                }
                                        },
                                        Err((e, monitor_update)) => {
-                                               match self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), monitor_update) {
+                                               match self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), &monitor_update) {
                                                        ChannelMonitorUpdateStatus::Completed => {},
                                                        e => {
                                                                // TODO: This needs to be handled somehow - if we receive a monitor update
@@ -3880,7 +3883,7 @@ where
                        };
                        // We update the ChannelMonitor on the backward link, after
                        // receiving an `update_fulfill_htlc` from the forward link.
-                       let update_res = self.chain_monitor.update_channel(prev_hop.outpoint, preimage_update);
+                       let update_res = self.chain_monitor.update_channel(prev_hop.outpoint, &preimage_update);
                        if update_res != ChannelMonitorUpdateStatus::Completed {
                                // TODO: This needs to be handled somehow - if we receive a monitor update
                                // with a preimage we *must* somehow manage to propagate it to the upstream
@@ -4057,7 +4060,7 @@ where
                                return;
                        }
 
-                       let updates = channel.get_mut().monitor_updating_restored(&self.logger, self.get_our_node_id(), self.genesis_hash, &self.default_configuration, self.best_block.read().unwrap().height());
+                       let updates = channel.get_mut().monitor_updating_restored(&self.logger, &self.node_signer, self.genesis_hash, &self.default_configuration, self.best_block.read().unwrap().height());
                        let channel_update = if updates.channel_ready.is_some() && channel.get().is_usable() {
                                // We only send a channel_update in the case where we are just now sending a
                                // channel_ready and the channel is in a usable state. We may re-send a
@@ -4171,7 +4174,7 @@ where
                Ok(())
        }
 
-       fn internal_open_channel(&self, counterparty_node_id: &PublicKey, their_features: InitFeatures, msg: &msgs::OpenChannel) -> Result<(), MsgHandleErrInternal> {
+       fn internal_open_channel(&self, counterparty_node_id: &PublicKey, msg: &msgs::OpenChannel) -> Result<(), MsgHandleErrInternal> {
                if msg.chain_hash != self.genesis_hash {
                        return Err(MsgHandleErrInternal::send_err_msg_no_close("Unknown genesis block hash".to_owned(), msg.temporary_channel_id.clone()));
                }
@@ -4185,8 +4188,15 @@ where
                let user_channel_id = u128::from_be_bytes(random_bytes);
 
                let outbound_scid_alias = self.create_and_insert_outbound_scid_alias();
+               let per_peer_state = self.per_peer_state.read().unwrap();
+               let peer_state_mutex_opt = per_peer_state.get(counterparty_node_id);
+               if let None = peer_state_mutex_opt {
+                       return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.temporary_channel_id.clone()))
+               }
+               let mut peer_state_lock = peer_state_mutex_opt.unwrap().lock().unwrap();
+               let peer_state = &mut *peer_state_lock;
                let mut channel = match Channel::new_from_req(&self.fee_estimator, &self.entropy_source, &self.signer_provider,
-                       counterparty_node_id.clone(), &their_features, msg, user_channel_id, &self.default_configuration,
+                       counterparty_node_id.clone(), &self.channel_type_features(), &peer_state.latest_features, msg, user_channel_id, &self.default_configuration,
                        self.best_block.read().unwrap().height(), &self.logger, outbound_scid_alias)
                {
                        Err(e) => {
@@ -4195,13 +4205,6 @@ where
                        },
                        Ok(res) => res
                };
-               let per_peer_state = self.per_peer_state.read().unwrap();
-               let peer_state_mutex_opt = per_peer_state.get(counterparty_node_id);
-               if let None = peer_state_mutex_opt {
-                       return Err(MsgHandleErrInternal::send_err_msg_no_close(format!("Can't find a peer matching the passed counterparty node_id {}", counterparty_node_id), msg.temporary_channel_id.clone()))
-               }
-               let mut peer_state_lock = peer_state_mutex_opt.unwrap().lock().unwrap();
-               let peer_state = &mut *peer_state_lock;
                match peer_state.channel_by_id.entry(channel.channel_id()) {
                        hash_map::Entry::Occupied(_) => {
                                self.outbound_scid_aliases.lock().unwrap().remove(&outbound_scid_alias);
@@ -4235,7 +4238,7 @@ where
                Ok(())
        }
 
-       fn internal_accept_channel(&self, counterparty_node_id: &PublicKey, their_features: InitFeatures, msg: &msgs::AcceptChannel) -> Result<(), MsgHandleErrInternal> {
+       fn internal_accept_channel(&self, counterparty_node_id: &PublicKey, msg: &msgs::AcceptChannel) -> Result<(), MsgHandleErrInternal> {
                let (value, output_script, user_id) = {
                        let per_peer_state = self.per_peer_state.read().unwrap();
                        let peer_state_mutex_opt = per_peer_state.get(counterparty_node_id);
@@ -4246,7 +4249,7 @@ where
                        let peer_state = &mut *peer_state_lock;
                        match peer_state.channel_by_id.entry(msg.temporary_channel_id) {
                                hash_map::Entry::Occupied(mut chan) => {
-                                       try_chan_entry!(self, chan.get_mut().accept_channel(&msg, &self.default_configuration.channel_handshake_limits, &their_features), chan);
+                                       try_chan_entry!(self, chan.get_mut().accept_channel(&msg, &self.default_configuration.channel_handshake_limits, &peer_state.latest_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(format!("Got a message for a channel from the wrong node! No such channel for the passed counterparty_node_id {}", counterparty_node_id), msg.temporary_channel_id))
@@ -4394,7 +4397,7 @@ where
                let peer_state = &mut *peer_state_lock;
                match peer_state.channel_by_id.entry(msg.channel_id) {
                        hash_map::Entry::Occupied(mut chan) => {
-                               let announcement_sigs_opt = try_chan_entry!(self, chan.get_mut().channel_ready(&msg, self.get_our_node_id(),
+                               let announcement_sigs_opt = try_chan_entry!(self, chan.get_mut().channel_ready(&msg, &self.node_signer,
                                        self.genesis_hash.clone(), &self.default_configuration, &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()));
@@ -4425,7 +4428,7 @@ where
                }
        }
 
-       fn internal_shutdown(&self, counterparty_node_id: &PublicKey, their_features: &InitFeatures, msg: &msgs::Shutdown) -> Result<(), MsgHandleErrInternal> {
+       fn internal_shutdown(&self, counterparty_node_id: &PublicKey, msg: &msgs::Shutdown) -> Result<(), MsgHandleErrInternal> {
                let mut dropped_htlcs: Vec<(HTLCSource, PaymentHash)>;
                let result: Result<(), _> = loop {
                        let per_peer_state = self.per_peer_state.read().unwrap();
@@ -4444,12 +4447,12 @@ where
                                                        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.signer_provider, &their_features, &msg), chan_entry);
+                                       let (shutdown, monitor_update, htlcs) = try_chan_entry!(self, chan_entry.get_mut().shutdown(&self.signer_provider, &peer_state.latest_features, &msg), chan_entry);
                                        dropped_htlcs = htlcs;
 
                                        // Update the monitor with the shutdown script if necessary.
                                        if let Some(monitor_update) = monitor_update {
-                                               let update_res = self.chain_monitor.update_channel(chan_entry.get().get_funding_txo().unwrap(), monitor_update);
+                                               let update_res = self.chain_monitor.update_channel(chan_entry.get().get_funding_txo().unwrap(), &monitor_update);
                                                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 {
@@ -4650,13 +4653,13 @@ where
                                                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);
+                                                       let _ = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), &update);
                                                        try_chan_entry!(self, Err(e), chan);
                                                        unreachable!();
                                                },
                                                Ok(res) => res
                                        };
-                               let update_res = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), monitor_update);
+                               let update_res = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), &monitor_update);
                                if let Err(e) = handle_monitor_update_res!(self, update_res, chan, RAACommitmentOrder::RevokeAndACKFirst, true, commitment_signed.is_some()) {
                                        return Err(e);
                                }
@@ -4792,7 +4795,7 @@ where
                                        let raa_updates = break_chan_entry!(self,
                                                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);
+                                       let update_res = self.chain_monitor.update_channel(chan.get().get_funding_txo().unwrap(), &raa_updates.monitor_update);
                                        if was_paused_for_mon_update {
                                                assert!(update_res != ChannelMonitorUpdateStatus::Completed);
                                                assert!(raa_updates.commitment_update.is_none());
@@ -4876,8 +4879,8 @@ where
 
                                peer_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, &self.default_configuration
+                                               &self.node_signer, self.genesis_hash.clone(), self.best_block.read().unwrap().height(),
+                                               msg, &self.default_configuration
                                        ), 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.
@@ -4948,7 +4951,7 @@ where
                                        // freed HTLCs to fail backwards. If in the future we no longer drop pending
                                        // 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,
+                                               msg, &self.logger, &self.node_signer, self.genesis_hash,
                                                &self.default_configuration, &*self.best_block.read().unwrap()), chan);
                                        let mut channel_update = None;
                                        if let Some(msg) = responses.shutdown_msg {
@@ -5097,7 +5100,7 @@ where
                                                                ));
                                                        }
                                                        if let Some((commitment_update, monitor_update)) = commitment_opt {
-                                                               match self.chain_monitor.update_channel(chan.get_funding_txo().unwrap(), monitor_update) {
+                                                               match self.chain_monitor.update_channel(chan.get_funding_txo().unwrap(), &monitor_update) {
                                                                        ChannelMonitorUpdateStatus::Completed => {
                                                                                pending_msg_events.push(events::MessageSendEvent::UpdateHTLCs {
                                                                                        node_id: chan.get_counterparty_node_id(),
@@ -5627,7 +5630,7 @@ where
                        *best_block = BestBlock::new(header.prev_blockhash, new_height)
                }
 
-               self.do_chain_event(Some(new_height), |channel| channel.best_block_updated(new_height, header.time, self.genesis_hash.clone(), self.get_our_node_id(), self.default_configuration.clone(), &self.logger));
+               self.do_chain_event(Some(new_height), |channel| channel.best_block_updated(new_height, header.time, self.genesis_hash.clone(), &self.node_signer, &self.default_configuration, &self.logger));
        }
 }
 
@@ -5651,13 +5654,13 @@ where
                log_trace!(self.logger, "{} transactions included in block {} at height {} provided", txdata.len(), block_hash, height);
 
                let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
-               self.do_chain_event(Some(height), |channel| channel.transactions_confirmed(&block_hash, height, txdata, self.genesis_hash.clone(), self.get_our_node_id(), &self.default_configuration, &self.logger)
+               self.do_chain_event(Some(height), |channel| channel.transactions_confirmed(&block_hash, height, txdata, self.genesis_hash.clone(), &self.node_signer, &self.default_configuration, &self.logger)
                        .map(|(a, b)| (a, Vec::new(), b)));
 
                let last_best_block_height = self.best_block.read().unwrap().height();
                if height < last_best_block_height {
                        let timestamp = self.highest_seen_timestamp.load(Ordering::Acquire);
-                       self.do_chain_event(Some(last_best_block_height), |channel| channel.best_block_updated(last_best_block_height, timestamp as u32, self.genesis_hash.clone(), self.get_our_node_id(), self.default_configuration.clone(), &self.logger));
+                       self.do_chain_event(Some(last_best_block_height), |channel| channel.best_block_updated(last_best_block_height, timestamp as u32, self.genesis_hash.clone(), &self.node_signer, &self.default_configuration, &self.logger));
                }
        }
 
@@ -5673,7 +5676,7 @@ where
 
                *self.best_block.write().unwrap() = BestBlock::new(block_hash, height);
 
-               self.do_chain_event(Some(height), |channel| channel.best_block_updated(height, header.time, self.genesis_hash.clone(), self.get_our_node_id(), self.default_configuration.clone(), &self.logger));
+               self.do_chain_event(Some(height), |channel| channel.best_block_updated(height, header.time, self.genesis_hash.clone(), &self.node_signer, &self.default_configuration, &self.logger));
 
                macro_rules! max_time {
                        ($timestamp: expr) => {
@@ -5784,7 +5787,7 @@ where
                                                                msg: announcement_sigs,
                                                        });
                                                        if let Some(height) = height_opt {
-                                                               if let Some(announcement) = channel.get_signed_channel_announcement(self.get_our_node_id(), self.genesis_hash, height, &self.default_configuration) {
+                                                               if let Some(announcement) = channel.get_signed_channel_announcement(&self.node_signer, self.genesis_hash, height, &self.default_configuration) {
                                                                        pending_msg_events.push(events::MessageSendEvent::BroadcastChannelAnnouncement {
                                                                                msg: announcement,
                                                                                // Note that announcement_signatures fails if the channel cannot be announced,
@@ -5976,14 +5979,14 @@ where
        R::Target: Router,
        L::Target: Logger,
 {
-       fn handle_open_channel(&self, counterparty_node_id: &PublicKey, their_features: InitFeatures, msg: &msgs::OpenChannel) {
+       fn handle_open_channel(&self, counterparty_node_id: &PublicKey, msg: &msgs::OpenChannel) {
                let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
-               let _ = handle_error!(self, self.internal_open_channel(counterparty_node_id, their_features, msg), *counterparty_node_id);
+               let _ = handle_error!(self, self.internal_open_channel(counterparty_node_id, msg), *counterparty_node_id);
        }
 
-       fn handle_accept_channel(&self, counterparty_node_id: &PublicKey, their_features: InitFeatures, msg: &msgs::AcceptChannel) {
+       fn handle_accept_channel(&self, counterparty_node_id: &PublicKey, msg: &msgs::AcceptChannel) {
                let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
-               let _ = handle_error!(self, self.internal_accept_channel(counterparty_node_id, their_features, msg), *counterparty_node_id);
+               let _ = handle_error!(self, self.internal_accept_channel(counterparty_node_id, msg), *counterparty_node_id);
        }
 
        fn handle_funding_created(&self, counterparty_node_id: &PublicKey, msg: &msgs::FundingCreated) {
@@ -6001,9 +6004,9 @@ where
                let _ = handle_error!(self, self.internal_channel_ready(counterparty_node_id, msg), *counterparty_node_id);
        }
 
-       fn handle_shutdown(&self, counterparty_node_id: &PublicKey, their_features: &InitFeatures, msg: &msgs::Shutdown) {
+       fn handle_shutdown(&self, counterparty_node_id: &PublicKey, msg: &msgs::Shutdown) {
                let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
-               let _ = handle_error!(self, self.internal_shutdown(counterparty_node_id, their_features, msg), *counterparty_node_id);
+               let _ = handle_error!(self, self.internal_shutdown(counterparty_node_id, msg), *counterparty_node_id);
        }
 
        fn handle_closing_signed(&self, counterparty_node_id: &PublicKey, msg: &msgs::ClosingSigned) {
@@ -6174,7 +6177,7 @@ where
                                        }
                                } else { true };
                                if retain && chan.get_counterparty_node_id() != *counterparty_node_id {
-                                       if let Some(msg) = chan.get_signed_channel_announcement(self.get_our_node_id(), self.genesis_hash.clone(), self.best_block.read().unwrap().height(), &self.default_configuration) {
+                                       if let Some(msg) = chan.get_signed_channel_announcement(&self.node_signer, self.genesis_hash.clone(), self.best_block.read().unwrap().height(), &self.default_configuration) {
                                                if let Ok(update_msg) = self.get_channel_update_for_broadcast(chan) {
                                                        pending_msg_events.push(events::MessageSendEvent::SendChannelAnnouncement {
                                                                node_id: *counterparty_node_id,
@@ -6264,7 +6267,7 @@ pub(crate) fn provided_channel_features(config: &UserConfig) -> ChannelFeatures
 /// Fetches the set of [`ChannelTypeFeatures`] flags which are provided by or required by
 /// [`ChannelManager`].
 pub(crate) fn provided_channel_type_features(config: &UserConfig) -> ChannelTypeFeatures {
-       ChannelTypeFeatures::from_counterparty_init(&provided_init_features(config))
+       ChannelTypeFeatures::from_init(&provided_init_features(config))
 }
 
 /// Fetches the set of [`InitFeatures`] flags which are provided by or required by
@@ -6285,6 +6288,12 @@ pub fn provided_init_features(_config: &UserConfig) -> InitFeatures {
        features.set_channel_type_optional();
        features.set_scid_privacy_optional();
        features.set_zero_conf_optional();
+       #[cfg(anchors)]
+       { // Attributes are not allowed on if expressions on our current MSRV of 1.41.
+               if _config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx {
+                       features.set_anchors_zero_fee_htlc_tx_optional();
+               }
+       }
        features
 }
 
@@ -6739,6 +6748,8 @@ where
                        }
                }
 
+               let per_peer_state = self.per_peer_state.write().unwrap();
+
                let pending_inbound_payments = self.pending_inbound_payments.lock().unwrap();
                let claimable_payments = self.claimable_payments.lock().unwrap();
                let pending_outbound_payments = self.pending_outbound_payments.pending_outbound_payments.lock().unwrap();
@@ -6754,7 +6765,6 @@ where
                        htlc_purposes.push(purpose);
                }
 
-               let per_peer_state = self.per_peer_state.write().unwrap();
                (per_peer_state.len() as u64).write(writer)?;
                for (peer_pubkey, peer_state_mutex) in per_peer_state.iter() {
                        peer_pubkey.write(writer)?;
@@ -7023,7 +7033,9 @@ where
                let mut short_to_chan_info = 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<<SP::Target as SignerProvider>::Signer> = Channel::read(reader, (&args.entropy_source, &args.signer_provider, best_block_height))?;
+                       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)
+                       ))?;
                        let funding_txo = channel.get_funding_txo().ok_or(DecodeError::InvalidValue)?;
                        funding_txo_set.insert(funding_txo.clone());
                        if let Some(ref mut monitor) = args.channel_monitors.get_mut(&funding_txo) {
@@ -7382,11 +7394,10 @@ where
                        pending_events_read.append(&mut channel_closures);
                }
 
-               let our_network_key = match args.node_signer.get_node_secret(Recipient::Node) {
+               let our_network_pubkey = match args.node_signer.get_node_id(Recipient::Node) {
                        Ok(key) => key,
                        Err(()) => return Err(DecodeError::InvalidValue)
                };
-               let our_network_pubkey = PublicKey::from_secret_key(&secp_ctx, &our_network_key);
                if let Some(network_pubkey) = received_network_pubkey {
                        if network_pubkey != our_network_pubkey {
                                log_error!(args.logger, "Key that was generated does not match the existing key.");
@@ -7502,7 +7513,6 @@ where
 
                        probing_cookie_secret: probing_cookie_secret.unwrap(),
 
-                       our_network_key,
                        our_network_pubkey,
                        secp_ctx,
 
@@ -8019,9 +8029,9 @@ mod tests {
 
                nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 1_000_000, 500_000_000, 42, None).unwrap();
                let open_channel = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
-               nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), nodes[0].node.init_features(), &open_channel);
+               nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel);
                let accept_channel = get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, nodes[0].node.get_our_node_id());
-               nodes[0].node.handle_accept_channel(&nodes[1].node.get_our_node_id(), nodes[1].node.init_features(), &accept_channel);
+               nodes[0].node.handle_accept_channel(&nodes[1].node.get_our_node_id(), &accept_channel);
 
                let (temporary_channel_id, tx, _funding_output) = create_funding_transaction(&nodes[0], &nodes[1].node.get_our_node_id(), 1_000_000, 42);
                let channel_id = &tx.txid().into_inner();
@@ -8066,9 +8076,9 @@ mod tests {
                update_nodes_with_chan_announce(&nodes, 0, 1, &announcement, &nodes_0_update, &nodes_1_update);
 
                nodes[0].node.close_channel(channel_id, &nodes[1].node.get_our_node_id()).unwrap();
-               nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &nodes[0].node.init_features(), &get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id()));
+               nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id()));
                let nodes_1_shutdown = get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id());
-               nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &nodes[1].node.init_features(), &nodes_1_shutdown);
+               nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &nodes_1_shutdown);
 
                let closing_signed_node_0 = get_event_msg!(nodes[0], MessageSendEvent::SendClosingSigned, nodes[1].node.get_our_node_id());
                nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &closing_signed_node_0);
@@ -8154,7 +8164,7 @@ mod tests {
                // creating dummy ones.
                nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 1_000_000, 500_000_000, 42, None).unwrap();
                let open_channel_msg = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
-               nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), nodes[0].node.init_features(), &open_channel_msg);
+               nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel_msg);
                let accept_channel_msg = get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, nodes[0].node.get_our_node_id());
 
                // Dummy values
@@ -8263,9 +8273,9 @@ mod tests {
                // Test the API functions and message handlers.
                check_not_connected_to_peer_error(nodes[0].node.create_channel(unkown_public_key, 1_000_000, 500_000_000, 42, None), unkown_public_key);
 
-               nodes[1].node.handle_open_channel(&unkown_public_key, nodes[0].node.init_features(), &open_channel_msg);
+               nodes[1].node.handle_open_channel(&unkown_public_key, &open_channel_msg);
 
-               nodes[0].node.handle_accept_channel(&unkown_public_key, nodes[1].node.init_features(), &accept_channel_msg);
+               nodes[0].node.handle_accept_channel(&unkown_public_key, &accept_channel_msg);
 
                check_unkown_peer_error(nodes[0].node.accept_inbound_channel(&open_channel_msg.temporary_channel_id, &unkown_public_key, 42), unkown_public_key);
 
@@ -8287,7 +8297,7 @@ mod tests {
 
                check_unkown_peer_error(nodes[0].node.update_channel_config(&unkown_public_key, &[channel_id], &ChannelConfig::default()), unkown_public_key);
 
-               nodes[0].node.handle_shutdown(&unkown_public_key, &nodes[1].node.init_features(), &shutdown_msg);
+               nodes[0].node.handle_shutdown(&unkown_public_key, &shutdown_msg);
 
                nodes[1].node.handle_closing_signed(&unkown_public_key, &closing_signed_msg);
 
@@ -8307,6 +8317,42 @@ mod tests {
 
                nodes[1].node.handle_update_fee(&unkown_public_key, &update_fee_msg);
        }
+
+       #[cfg(anchors)]
+       #[test]
+       fn test_anchors_zero_fee_htlc_tx_fallback() {
+               // Tests that if both nodes support anchors, but the remote node does not want to accept
+               // anchor channels at the moment, an error it sent to the local node such that it can retry
+               // the channel without the anchors feature.
+               let chanmon_cfgs = create_chanmon_cfgs(2);
+               let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
+               let mut anchors_config = test_default_channel_config();
+               anchors_config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
+               anchors_config.manually_accept_inbound_channels = true;
+               let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[Some(anchors_config.clone()), Some(anchors_config.clone())]);
+               let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
+
+               nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 100_000, 0, 0, None).unwrap();
+               let open_channel_msg = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
+               assert!(open_channel_msg.channel_type.as_ref().unwrap().supports_anchors_zero_fee_htlc_tx());
+
+               nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), &open_channel_msg);
+               let events = nodes[1].node.get_and_clear_pending_events();
+               match events[0] {
+                       Event::OpenChannelRequest { temporary_channel_id, .. } => {
+                               nodes[1].node.force_close_broadcasting_latest_txn(&temporary_channel_id, &nodes[0].node.get_our_node_id()).unwrap();
+                       }
+                       _ => panic!("Unexpected event"),
+               }
+
+               let error_msg = get_err_msg!(nodes[1], nodes[0].node.get_our_node_id());
+               nodes[0].node.handle_error(&nodes[1].node.get_our_node_id(), &error_msg);
+
+               let open_channel_msg = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
+               assert!(!open_channel_msg.channel_type.unwrap().supports_anchors_zero_fee_htlc_tx());
+
+               check_closed_event!(nodes[1], 1, ClosureReason::HolderForceClosed);
+       }
 }
 
 #[cfg(all(any(test, feature = "_test_utils"), feature = "_bench_unstable"))]
@@ -8384,8 +8430,8 @@ pub mod bench {
                node_a.peer_connected(&node_b.get_our_node_id(), &Init { features: node_b.init_features(), remote_network_address: None }).unwrap();
                node_b.peer_connected(&node_a.get_our_node_id(), &Init { features: node_a.init_features(), remote_network_address: None }).unwrap();
                node_a.create_channel(node_b.get_our_node_id(), 8_000_000, 100_000_000, 42, None).unwrap();
-               node_b.handle_open_channel(&node_a.get_our_node_id(), node_a.init_features(), &get_event_msg!(node_a_holder, MessageSendEvent::SendOpenChannel, node_b.get_our_node_id()));
-               node_a.handle_accept_channel(&node_b.get_our_node_id(), node_b.init_features(), &get_event_msg!(node_b_holder, MessageSendEvent::SendAcceptChannel, node_a.get_our_node_id()));
+               node_b.handle_open_channel(&node_a.get_our_node_id(), &get_event_msg!(node_a_holder, MessageSendEvent::SendOpenChannel, node_b.get_our_node_id()));
+               node_a.handle_accept_channel(&node_b.get_our_node_id(), &get_event_msg!(node_b_holder, MessageSendEvent::SendAcceptChannel, node_a.get_our_node_id()));
 
                let tx;
                if let Event::FundingGenerationReady { temporary_channel_id, output_script, .. } = get_event!(node_a_holder, Event::FundingGenerationReady) {