Look up node id from scid in OnionMessenger
[rust-lightning] / lightning / src / ln / functional_test_utils.rs
index a2d9631716c4c23098135a8f95ee37a1fc5a6949..ee4c027a10ec56c8ceb02beaf99bced52b7f71b4 100644 (file)
 //! nodes for functional tests.
 
 use crate::chain::{BestBlock, ChannelMonitorUpdateStatus, Confirm, Listen, Watch, chainmonitor::Persist};
-use crate::sign::EntropySource;
 use crate::chain::channelmonitor::ChannelMonitor;
 use crate::chain::transaction::OutPoint;
 use crate::events::{ClaimedHTLC, ClosureReason, Event, HTLCDestination, MessageSendEvent, MessageSendEventsProvider, PathFailure, PaymentPurpose, PaymentFailureReason};
 use crate::events::bump_transaction::{BumpTransactionEvent, BumpTransactionEventHandler, Wallet, WalletSource};
 use crate::ln::{ChannelId, PaymentPreimage, PaymentHash, PaymentSecret};
 use crate::ln::channelmanager::{AChannelManager, ChainParameters, ChannelManager, ChannelManagerReadArgs, RAACommitmentOrder, PaymentSendFailure, RecipientOnionFields, PaymentId, MIN_CLTV_EXPIRY_DELTA};
-use crate::routing::gossip::{P2PGossipSync, NetworkGraph, NetworkUpdate};
-use crate::routing::router::{self, PaymentParameters, Route, RouteParameters};
 use crate::ln::features::InitFeatures;
 use crate::ln::msgs;
-use crate::ln::msgs::{ChannelMessageHandler,RoutingMessageHandler};
-use crate::util::test_channel_signer::TestChannelSigner;
+use crate::ln::msgs::{ChannelMessageHandler, OnionMessageHandler, RoutingMessageHandler};
+use crate::ln::peer_handler::IgnoringMessageHandler;
+use crate::onion_message::messenger::OnionMessenger;
+use crate::routing::gossip::{P2PGossipSync, NetworkGraph, NetworkUpdate};
+use crate::routing::router::{self, PaymentParameters, Route, RouteParameters};
+use crate::sign::{EntropySource, RandomBytes};
+use crate::util::config::{UserConfig, MaxDustHTLCExposure};
+use crate::util::errors::APIError;
+#[cfg(test)]
+use crate::util::logger::Logger;
 use crate::util::scid_utils;
+use crate::util::test_channel_signer::TestChannelSigner;
 use crate::util::test_utils;
 use crate::util::test_utils::{panicking, TestChainMonitor, TestScorer, TestKeysInterface};
-use crate::util::errors::APIError;
-use crate::util::config::{UserConfig, MaxDustHTLCExposure};
 use crate::util::ser::{ReadableArgs, Writeable};
-#[cfg(test)]
-use crate::util::logger::Logger;
 
 use bitcoin::blockdata::block::{Block, Header, Version};
 use bitcoin::blockdata::locktime::absolute::LockTime;
@@ -43,13 +45,14 @@ use bitcoin::network::constants::Network;
 use bitcoin::pow::CompactTarget;
 use bitcoin::secp256k1::{PublicKey, SecretKey};
 
+use alloc::rc::Rc;
+use core::cell::RefCell;
+use core::iter::repeat;
+use core::mem;
+use core::ops::Deref;
 use crate::io;
 use crate::prelude::*;
-use core::cell::RefCell;
-use alloc::rc::Rc;
 use crate::sync::{Arc, Mutex, LockTestExt, RwLock};
-use core::mem;
-use core::iter::repeat;
 
 pub const CHAN_CONFIRM_DEPTH: u32 = 10;
 
@@ -249,7 +252,7 @@ pub fn connect_block<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>, block: &Block)
 
 fn call_claimable_balances<'a, 'b, 'c, 'd>(node: &'a Node<'b, 'c, 'd>) {
        // Ensure `get_claimable_balances`' self-tests never panic
-       for funding_outpoint in node.chain_monitor.chain_monitor.list_monitors() {
+       for (funding_outpoint, _channel_id) in node.chain_monitor.chain_monitor.list_monitors() {
                node.chain_monitor.chain_monitor.get_monitor(funding_outpoint).unwrap().get_claimable_balances();
        }
 }
@@ -388,6 +391,7 @@ pub struct NodeCfg<'a> {
        pub tx_broadcaster: &'a test_utils::TestBroadcaster,
        pub fee_estimator: &'a test_utils::TestFeeEstimator,
        pub router: test_utils::TestRouter<'a>,
+       pub message_router: test_utils::TestMessageRouter<'a>,
        pub chain_monitor: test_utils::TestChainMonitor<'a>,
        pub keys_manager: &'a test_utils::TestKeysInterface,
        pub logger: &'a test_utils::TestLogger,
@@ -407,6 +411,27 @@ type TestChannelManager<'node_cfg, 'chan_mon_cfg> = ChannelManager<
        &'chan_mon_cfg test_utils::TestLogger,
 >;
 
+type TestOnionMessenger<'chan_man, 'node_cfg, 'chan_mon_cfg> = OnionMessenger<
+       DedicatedEntropy,
+       &'node_cfg test_utils::TestKeysInterface,
+       &'chan_mon_cfg test_utils::TestLogger,
+       &'chan_man TestChannelManager<'node_cfg, 'chan_mon_cfg>,
+       &'node_cfg test_utils::TestMessageRouter<'chan_mon_cfg>,
+       &'chan_man TestChannelManager<'node_cfg, 'chan_mon_cfg>,
+       IgnoringMessageHandler,
+>;
+
+/// For use with [`OnionMessenger`] otherwise `test_restored_packages_retry` will fail. This is
+/// because that test uses older serialized data produced by calling [`EntropySource`] in a specific
+/// manner. Using the same [`EntropySource`] with [`OnionMessenger`] would introduce another call,
+/// causing the produced data to no longer match.
+pub struct DedicatedEntropy(RandomBytes);
+
+impl Deref for DedicatedEntropy {
+       type Target = RandomBytes;
+       fn deref(&self) -> &Self::Target { &self.0 }
+}
+
 pub struct Node<'chan_man, 'node_cfg: 'chan_man, 'chan_mon_cfg: 'node_cfg> {
        pub chain_source: &'chan_mon_cfg test_utils::TestChainSource,
        pub tx_broadcaster: &'chan_mon_cfg test_utils::TestBroadcaster,
@@ -415,6 +440,7 @@ pub struct Node<'chan_man, 'node_cfg: 'chan_man, 'chan_mon_cfg: 'node_cfg> {
        pub chain_monitor: &'node_cfg test_utils::TestChainMonitor<'chan_mon_cfg>,
        pub keys_manager: &'chan_mon_cfg test_utils::TestKeysInterface,
        pub node: &'chan_man TestChannelManager<'node_cfg, 'chan_mon_cfg>,
+       pub onion_messenger: TestOnionMessenger<'chan_man, 'node_cfg, 'chan_mon_cfg>,
        pub network_graph: &'node_cfg NetworkGraph<&'chan_mon_cfg test_utils::TestLogger>,
        pub gossip_sync: P2PGossipSync<&'node_cfg NetworkGraph<&'chan_mon_cfg test_utils::TestLogger>, &'chan_mon_cfg test_utils::TestChainSource, &'chan_mon_cfg test_utils::TestLogger>,
        pub node_seed: [u8; 32],
@@ -432,6 +458,14 @@ pub struct Node<'chan_man, 'node_cfg: 'chan_man, 'chan_mon_cfg: 'node_cfg> {
                &'chan_mon_cfg test_utils::TestLogger,
        >,
 }
+
+impl<'a, 'b, 'c> Node<'a, 'b, 'c> {
+       pub fn init_features(&self, peer_node_id: &PublicKey) -> InitFeatures {
+               self.override_init_features.borrow().clone()
+                       .unwrap_or_else(|| self.node.init_features() | self.onion_messenger.provided_init_features(peer_node_id))
+       }
+}
+
 #[cfg(feature = "std")]
 impl<'a, 'b, 'c> std::panic::UnwindSafe for Node<'a, 'b, 'c> {}
 #[cfg(feature = "std")]
@@ -454,16 +488,38 @@ impl<'a, 'b, 'c> Node<'a, 'b, 'c> {
        /// `release_commitment_secret` are affected by this setting.
        #[cfg(test)]
        pub fn set_channel_signer_available(&self, peer_id: &PublicKey, chan_id: &ChannelId, available: bool) {
+               use crate::sign::ChannelSigner;
+               log_debug!(self.logger, "Setting channel signer for {} as available={}", chan_id, available);
+
                let per_peer_state = self.node.per_peer_state.read().unwrap();
                let chan_lock = per_peer_state.get(peer_id).unwrap().lock().unwrap();
-               let signer = (|| {
-                       match chan_lock.channel_by_id.get(chan_id) {
-                               Some(phase) => phase.context().get_signer(),
-                               None => panic!("Couldn't find a channel with id {}", chan_id),
+
+               let mut channel_keys_id = None;
+               if let Some(chan) = chan_lock.channel_by_id.get(chan_id).map(|phase| phase.context()) {
+                       chan.get_signer().as_ecdsa().unwrap().set_available(available);
+                       channel_keys_id = Some(chan.channel_keys_id);
+               }
+
+               let mut monitor = None;
+               for (funding_txo, channel_id) in self.chain_monitor.chain_monitor.list_monitors() {
+                       if *chan_id == channel_id {
+                               monitor = self.chain_monitor.chain_monitor.get_monitor(funding_txo).ok();
                        }
-               })();
-               log_debug!(self.logger, "Setting channel signer for {} as available={}", chan_id, available);
-               signer.as_ecdsa().unwrap().set_available(available);
+               }
+               if let Some(monitor) = monitor {
+                       monitor.do_signer_call(|signer| {
+                               channel_keys_id = channel_keys_id.or(Some(signer.inner.channel_keys_id()));
+                               signer.set_available(available)
+                       });
+               }
+
+               if available {
+                       self.keys_manager.unavailable_signers.lock().unwrap()
+                               .remove(channel_keys_id.as_ref().unwrap());
+               } else {
+                       self.keys_manager.unavailable_signers.lock().unwrap()
+                               .insert(channel_keys_id.unwrap());
+               }
        }
 }
 
@@ -568,7 +624,7 @@ impl<'a, 'b, 'c> Drop for Node<'a, 'b, 'c> {
                        let feeest = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
                        let mut deserialized_monitors = Vec::new();
                        {
-                               for outpoint in self.chain_monitor.chain_monitor.list_monitors() {
+                               for (outpoint, _channel_id) in self.chain_monitor.chain_monitor.list_monitors() {
                                        let mut w = test_utils::TestVecWriter(Vec::new());
                                        self.chain_monitor.chain_monitor.get_monitor(outpoint).unwrap().write(&mut w).unwrap();
                                        let (_, deserialized_monitor) = <(BlockHash, ChannelMonitor<TestChannelSigner>)>::read(
@@ -585,7 +641,7 @@ impl<'a, 'b, 'c> Drop for Node<'a, 'b, 'c> {
                        // Before using all the new monitors to check the watch outpoints, use the full set of
                        // them to ensure we can write and reload our ChannelManager.
                        {
-                               let mut channel_monitors = HashMap::new();
+                               let mut channel_monitors = new_hash_map();
                                for monitor in deserialized_monitors.iter_mut() {
                                        channel_monitors.insert(monitor.get_funding_txo().0, monitor);
                                }
@@ -599,7 +655,7 @@ impl<'a, 'b, 'c> Drop for Node<'a, 'b, 'c> {
                                        node_signer: self.keys_manager,
                                        signer_provider: self.keys_manager,
                                        fee_estimator: &test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) },
-                                       router: &test_utils::TestRouter::new(Arc::new(network_graph), &scorer),
+                                       router: &test_utils::TestRouter::new(Arc::new(network_graph), &self.logger, &scorer),
                                        chain_monitor: self.chain_monitor,
                                        tx_broadcaster: &broadcaster,
                                        logger: &self.logger,
@@ -611,7 +667,8 @@ impl<'a, 'b, 'c> Drop for Node<'a, 'b, 'c> {
                        let chain_source = test_utils::TestChainSource::new(Network::Testnet);
                        let chain_monitor = test_utils::TestChainMonitor::new(Some(&chain_source), &broadcaster, &self.logger, &feeest, &persister, &self.keys_manager);
                        for deserialized_monitor in deserialized_monitors.drain(..) {
-                               if chain_monitor.watch_channel(deserialized_monitor.get_funding_txo().0, deserialized_monitor) != Ok(ChannelMonitorUpdateStatus::Completed) {
+                               let funding_outpoint = deserialized_monitor.get_funding_txo().0;
+                               if chain_monitor.watch_channel(funding_outpoint, deserialized_monitor) != Ok(ChannelMonitorUpdateStatus::Completed) {
                                        panic!();
                                }
                        }
@@ -1015,7 +1072,7 @@ pub fn _reload_node<'a, 'b, 'c>(node: &'a Node<'a, 'b, 'c>, default_config: User
 
        let mut node_read = &chanman_encoded[..];
        let (_, node_deserialized) = {
-               let mut channel_monitors = HashMap::new();
+               let mut channel_monitors = new_hash_map();
                for monitor in monitors_read.iter_mut() {
                        assert!(channel_monitors.insert(monitor.get_funding_txo().0, monitor).is_none());
                }
@@ -1035,7 +1092,8 @@ pub fn _reload_node<'a, 'b, 'c>(node: &'a Node<'a, 'b, 'c>, default_config: User
        assert!(node_read.is_empty());
 
        for monitor in monitors_read.drain(..) {
-               assert_eq!(node.chain_monitor.watch_channel(monitor.get_funding_txo().0, monitor),
+               let funding_outpoint = monitor.get_funding_txo().0;
+               assert_eq!(node.chain_monitor.watch_channel(funding_outpoint, monitor),
                        Ok(ChannelMonitorUpdateStatus::Completed));
                check_added_monitors!(node, 1);
        }
@@ -1054,6 +1112,7 @@ macro_rules! reload_node {
 
                $new_channelmanager = _reload_node(&$node, $new_config, &chanman_encoded, $monitors_encoded);
                $node.node = &$new_channelmanager;
+               $node.onion_messenger.set_offers_handler(&$new_channelmanager);
        };
        ($node: expr, $chanman_encoded: expr, $monitors_encoded: expr, $persister: ident, $new_chain_monitor: ident, $new_channelmanager: ident) => {
                reload_node!($node, $crate::util::config::UserConfig::default(), $chanman_encoded, $monitors_encoded, $persister, $new_chain_monitor, $new_channelmanager);
@@ -1167,7 +1226,7 @@ pub fn open_zero_conf_channel<'a, 'b, 'c, 'd>(initiator: &'a Node<'b, 'c, 'd>, r
        };
 
        let accept_channel = get_event_msg!(receiver, MessageSendEvent::SendAcceptChannel, initiator.node.get_our_node_id());
-       assert_eq!(accept_channel.minimum_depth, 0);
+       assert_eq!(accept_channel.common_fields.minimum_depth, 0);
        initiator.node.handle_accept_channel(&receiver.node.get_our_node_id(), &accept_channel);
 
        let (temporary_channel_id, tx, _) = create_funding_transaction(&initiator, &receiver.node.get_our_node_id(), 100_000, 42);
@@ -1218,10 +1277,10 @@ pub fn open_zero_conf_channel<'a, 'b, 'c, 'd>(initiator: &'a Node<'b, 'c, 'd>, r
        (tx, as_channel_ready.channel_id)
 }
 
-pub fn create_chan_between_nodes_with_value_init<'a, 'b, 'c>(node_a: &Node<'a, 'b, 'c>, node_b: &Node<'a, 'b, 'c>, channel_value: u64, push_msat: u64) -> Transaction {
+pub fn exchange_open_accept_chan<'a, 'b, 'c>(node_a: &Node<'a, 'b, 'c>, node_b: &Node<'a, 'b, 'c>, channel_value: u64, push_msat: u64) -> ChannelId {
        let create_chan_id = node_a.node.create_channel(node_b.node.get_our_node_id(), channel_value, push_msat, 42, None, None).unwrap();
        let open_channel_msg = get_event_msg!(node_a, MessageSendEvent::SendOpenChannel, node_b.node.get_our_node_id());
-       assert_eq!(open_channel_msg.temporary_channel_id, create_chan_id);
+       assert_eq!(open_channel_msg.common_fields.temporary_channel_id, create_chan_id);
        assert_eq!(node_a.node.list_channels().iter().find(|channel| channel.channel_id == create_chan_id).unwrap().user_channel_id, 42);
        node_b.node.handle_open_channel(&node_a.node.get_our_node_id(), &open_channel_msg);
        if node_b.node.get_current_default_configuration().manually_accept_inbound_channels {
@@ -1234,10 +1293,15 @@ pub fn create_chan_between_nodes_with_value_init<'a, 'b, 'c>(node_a: &Node<'a, '
                };
        }
        let accept_channel_msg = get_event_msg!(node_b, MessageSendEvent::SendAcceptChannel, node_a.node.get_our_node_id());
-       assert_eq!(accept_channel_msg.temporary_channel_id, create_chan_id);
+       assert_eq!(accept_channel_msg.common_fields.temporary_channel_id, create_chan_id);
        node_a.node.handle_accept_channel(&node_b.node.get_our_node_id(), &accept_channel_msg);
        assert_ne!(node_b.node.list_channels().iter().find(|channel| channel.channel_id == create_chan_id).unwrap().user_channel_id, 0);
 
+       create_chan_id
+}
+
+pub fn create_chan_between_nodes_with_value_init<'a, 'b, 'c>(node_a: &Node<'a, 'b, 'c>, node_b: &Node<'a, 'b, 'c>, channel_value: u64, push_msat: u64) -> Transaction {
+       let create_chan_id = exchange_open_accept_chan(node_a, node_b, channel_value, push_msat);
        sign_funding_transaction(node_a, node_b, channel_value, create_chan_id)
 }
 
@@ -1490,11 +1554,29 @@ macro_rules! check_warn_msg {
        }}
 }
 
+/// Checks if at least one peer is connected.
+fn is_any_peer_connected(node: &Node) -> bool {
+       let peer_state = node.node.per_peer_state.read().unwrap();
+       for (_, peer_mutex) in peer_state.iter() {
+               let peer = peer_mutex.lock().unwrap();
+               if peer.is_connected { return true; }
+       }
+       false
+}
+
 /// Check that a channel's closing channel update has been broadcasted, and optionally
 /// check whether an error message event has occurred.
 pub fn check_closed_broadcast(node: &Node, num_channels: usize, with_error_msg: bool) -> Vec<msgs::ErrorMessage> {
+       let mut dummy_connected = false;
+       if !is_any_peer_connected(node) {
+               connect_dummy_node(&node);
+               dummy_connected = true;
+       }
        let msg_events = node.node.get_and_clear_pending_msg_events();
        assert_eq!(msg_events.len(), if with_error_msg { num_channels * 2 } else { num_channels });
+       if dummy_connected {
+               disconnect_dummy_node(&node);
+       }
        msg_events.into_iter().filter_map(|msg_event| {
                match msg_event {
                        MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
@@ -1534,6 +1616,8 @@ pub struct ExpectedCloseEvent {
        pub counterparty_node_id: Option<PublicKey>,
        pub discard_funding: bool,
        pub reason: Option<ClosureReason>,
+       pub channel_funding_txo: Option<OutPoint>,
+       pub user_channel_id: Option<u128>,
 }
 
 impl ExpectedCloseEvent {
@@ -1544,6 +1628,8 @@ impl ExpectedCloseEvent {
                        counterparty_node_id: None,
                        discard_funding,
                        reason: Some(reason),
+                       channel_funding_txo: None,
+                       user_channel_id: None,
                }
        }
 }
@@ -1562,12 +1648,20 @@ pub fn check_closed_events(node: &Node, expected_close_events: &[ExpectedCloseEv
                                reason,
                                counterparty_node_id,
                                channel_capacity_sats,
+                               channel_funding_txo,
+                               user_channel_id,
                                ..
                        } if (
                                expected_event.channel_id.map(|expected| *channel_id == expected).unwrap_or(true) &&
                                expected_event.reason.as_ref().map(|expected| reason == expected).unwrap_or(true) &&
-                               expected_event.counterparty_node_id.map(|expected| *counterparty_node_id == Some(expected)).unwrap_or(true) &&
-                               expected_event.channel_capacity_sats.map(|expected| *channel_capacity_sats == Some(expected)).unwrap_or(true)
+                               expected_event.
+                                       counterparty_node_id.map(|expected| *counterparty_node_id == Some(expected)).unwrap_or(true) &&
+                               expected_event.channel_capacity_sats
+                                       .map(|expected| *channel_capacity_sats == Some(expected)).unwrap_or(true) &&
+                               expected_event.channel_funding_txo
+                                       .map(|expected| *channel_funding_txo == Some(expected)).unwrap_or(true) &&
+                               expected_event.user_channel_id
+                                       .map(|expected| *user_channel_id == expected).unwrap_or(true)
                        )
                )));
        }
@@ -1592,6 +1686,8 @@ pub fn check_closed_event(node: &Node, events_count: usize, expected_reason: Clo
                counterparty_node_id: Some(*node_id),
                discard_funding: is_check_discard_funding,
                reason: Some(expected_reason.clone()),
+               channel_funding_txo: None,
+               user_channel_id: None,
        }).collect::<Vec<_>>();
        check_closed_events(node, expected_close_events.as_slice());
 }
@@ -1750,14 +1846,9 @@ macro_rules! expect_htlc_handling_failed_destinations {
 /// there are any [`Event::HTLCHandlingFailed`] events their [`HTLCDestination`] is included in the
 /// `expected_failures` set.
 pub fn expect_pending_htlcs_forwardable_conditions(events: Vec<Event>, expected_failures: &[HTLCDestination]) {
-       match events[0] {
-               Event::PendingHTLCsForwardable { .. } => { },
-               _ => panic!("Unexpected event {:?}", events),
-       };
-
        let count = expected_failures.len() + 1;
        assert_eq!(events.len(), count);
-
+       assert!(events.iter().find(|event| matches!(event, Event::PendingHTLCsForwardable { .. })).is_some());
        if expected_failures.len() > 0 {
                expect_htlc_handling_failed_destinations!(events, expected_failures)
        }
@@ -2146,38 +2237,74 @@ macro_rules! expect_payment_path_successful {
        }
 }
 
+/// Returns the total fee earned by this HTLC forward, in msat.
 pub fn expect_payment_forwarded<CM: AChannelManager, H: NodeHolder<CM=CM>>(
        event: Event, node: &H, prev_node: &H, next_node: &H, expected_fee: Option<u64>,
-       upstream_force_closed: bool, downstream_force_closed: bool
-) {
+       expected_extra_fees_msat: Option<u64>, upstream_force_closed: bool,
+       downstream_force_closed: bool, allow_1_msat_fee_overpay: bool,
+) -> Option<u64> {
        match event {
                Event::PaymentForwarded {
-                       fee_earned_msat, prev_channel_id, claim_from_onchain_tx, next_channel_id,
-                       outbound_amount_forwarded_msat: _
+                       prev_channel_id, next_channel_id, prev_user_channel_id, next_user_channel_id,
+                       total_fee_earned_msat, skimmed_fee_msat, claim_from_onchain_tx, ..
                } => {
-                       assert_eq!(fee_earned_msat, expected_fee);
+                       if allow_1_msat_fee_overpay {
+                               // Aggregating fees for blinded paths may result in a rounding error, causing slight
+                               // overpayment in fees.
+                               let actual_fee = total_fee_earned_msat.unwrap();
+                               let expected_fee = expected_fee.unwrap();
+                               assert!(actual_fee == expected_fee || actual_fee == expected_fee + 1);
+                       } else {
+                               assert_eq!(total_fee_earned_msat, expected_fee);
+                       }
+
+                       // Check that the (knowingly) withheld amount is always less or equal to the expected
+                       // overpaid amount.
+                       assert!(skimmed_fee_msat == expected_extra_fees_msat);
                        if !upstream_force_closed {
                                // Is the event prev_channel_id in one of the channels between the two nodes?
-                               assert!(node.node().list_channels().iter().any(|x| x.counterparty.node_id == prev_node.node().get_our_node_id() && x.channel_id == prev_channel_id.unwrap()));
+                               assert!(node.node().list_channels().iter().any(|x|
+                                       x.counterparty.node_id == prev_node.node().get_our_node_id() &&
+                                       x.channel_id == prev_channel_id.unwrap() &&
+                                       x.user_channel_id == prev_user_channel_id.unwrap()
+                               ));
                        }
                        // We check for force closures since a force closed channel is removed from the
                        // node's channel list
                        if !downstream_force_closed {
-                               assert!(node.node().list_channels().iter().any(|x| x.counterparty.node_id == next_node.node().get_our_node_id() && x.channel_id == next_channel_id.unwrap()));
+                               // As documented, `next_user_channel_id` will only be `Some` if we didn't settle via an
+                               // onchain transaction, just as the `total_fee_earned_msat` field. Rather than
+                               // introducing yet another variable, we use the latter's state as a flag to detect
+                               // this and only check if it's `Some`.
+                               if total_fee_earned_msat.is_none() {
+                                       assert!(node.node().list_channels().iter().any(|x|
+                                               x.counterparty.node_id == next_node.node().get_our_node_id() &&
+                                               x.channel_id == next_channel_id.unwrap()
+                                       ));
+                               } else {
+                                       assert!(node.node().list_channels().iter().any(|x|
+                                               x.counterparty.node_id == next_node.node().get_our_node_id() &&
+                                               x.channel_id == next_channel_id.unwrap() &&
+                                               x.user_channel_id == next_user_channel_id.unwrap()
+                                       ));
+                               }
                        }
                        assert_eq!(claim_from_onchain_tx, downstream_force_closed);
+                       total_fee_earned_msat
                },
                _ => panic!("Unexpected event"),
        }
 }
 
+#[macro_export]
 macro_rules! expect_payment_forwarded {
        ($node: expr, $prev_node: expr, $next_node: expr, $expected_fee: expr, $upstream_force_closed: expr, $downstream_force_closed: expr) => {
                let mut events = $node.node.get_and_clear_pending_events();
                assert_eq!(events.len(), 1);
                $crate::ln::functional_test_utils::expect_payment_forwarded(
-                       events.pop().unwrap(), &$node, &$prev_node, &$next_node, $expected_fee,
-                       $upstream_force_closed, $downstream_force_closed);
+                       events.pop().unwrap(), &$node, &$prev_node, &$next_node, $expected_fee, None,
+                       $upstream_force_closed, $downstream_force_closed, false
+               );
        }
 }
 
@@ -2388,7 +2515,65 @@ fn fail_payment_along_path<'a, 'b, 'c>(expected_path: &[&Node<'a, 'b, 'c>]) {
        }
 }
 
-pub fn do_pass_along_path<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_path: &[&Node<'a, 'b, 'c>], recv_value: u64, our_payment_hash: PaymentHash, our_payment_secret: Option<PaymentSecret>, ev: MessageSendEvent, payment_claimable_expected: bool, clear_recipient_events: bool, expected_preimage: Option<PaymentPreimage>, is_probe: bool) -> Option<Event> {
+pub struct PassAlongPathArgs<'a, 'b, 'c, 'd> {
+       pub origin_node: &'a Node<'b, 'c, 'd>,
+       pub expected_path: &'a [&'a Node<'b, 'c, 'd>],
+       pub recv_value: u64,
+       pub payment_hash: PaymentHash,
+       pub payment_secret: Option<PaymentSecret>,
+       pub event: MessageSendEvent,
+       pub payment_claimable_expected: bool,
+       pub clear_recipient_events: bool,
+       pub expected_preimage: Option<PaymentPreimage>,
+       pub is_probe: bool,
+       pub custom_tlvs: Vec<(u64, Vec<u8>)>,
+}
+
+impl<'a, 'b, 'c, 'd> PassAlongPathArgs<'a, 'b, 'c, 'd> {
+       pub fn new(
+               origin_node: &'a Node<'b, 'c, 'd>, expected_path: &'a [&'a Node<'b, 'c, 'd>], recv_value: u64,
+               payment_hash: PaymentHash, event: MessageSendEvent,
+       ) -> Self {
+               Self {
+                       origin_node, expected_path, recv_value, payment_hash, payment_secret: None, event,
+                       payment_claimable_expected: true, clear_recipient_events: true, expected_preimage: None,
+                       is_probe: false, custom_tlvs: Vec::new(),
+               }
+       }
+       pub fn without_clearing_recipient_events(mut self) -> Self {
+               self.clear_recipient_events = false;
+               self
+       }
+       pub fn is_probe(mut self) -> Self {
+               self.payment_claimable_expected = false;
+               self.is_probe = true;
+               self
+       }
+       pub fn without_claimable_event(mut self) -> Self {
+               self.payment_claimable_expected = false;
+               self
+       }
+       pub fn with_payment_secret(mut self, payment_secret: PaymentSecret) -> Self {
+               self.payment_secret = Some(payment_secret);
+               self
+       }
+       pub fn with_payment_preimage(mut self, payment_preimage: PaymentPreimage) -> Self {
+               self.expected_preimage = Some(payment_preimage);
+               self
+       }
+       pub fn with_custom_tlvs(mut self, custom_tlvs: Vec<(u64, Vec<u8>)>) -> Self {
+               self.custom_tlvs = custom_tlvs;
+               self
+       }
+}
+
+pub fn do_pass_along_path<'a, 'b, 'c>(args: PassAlongPathArgs) -> Option<Event> {
+       let PassAlongPathArgs {
+               origin_node, expected_path, recv_value, payment_hash: our_payment_hash,
+               payment_secret: our_payment_secret, event: ev, payment_claimable_expected,
+               clear_recipient_events, expected_preimage, is_probe, custom_tlvs
+       } = args;
+
        let mut payment_event = SendEvent::from_event(ev);
        let mut prev_node = origin_node;
        let mut event = None;
@@ -2419,6 +2604,7 @@ pub fn do_pass_along_path<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_p
                                                assert_eq!(our_payment_hash, *payment_hash);
                                                assert_eq!(node.node.get_our_node_id(), receiver_node_id.unwrap());
                                                assert!(onion_fields.is_some());
+                                               assert_eq!(onion_fields.as_ref().unwrap().custom_tlvs, custom_tlvs);
                                                match &purpose {
                                                        PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
                                                                assert_eq!(expected_preimage, *payment_preimage);
@@ -2455,7 +2641,17 @@ pub fn do_pass_along_path<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_p
 }
 
 pub fn pass_along_path<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_path: &[&Node<'a, 'b, 'c>], recv_value: u64, our_payment_hash: PaymentHash, our_payment_secret: Option<PaymentSecret>, ev: MessageSendEvent, payment_claimable_expected: bool, expected_preimage: Option<PaymentPreimage>) -> Option<Event> {
-       do_pass_along_path(origin_node, expected_path, recv_value, our_payment_hash, our_payment_secret, ev, payment_claimable_expected, true, expected_preimage, false)
+       let mut args = PassAlongPathArgs::new(origin_node, expected_path, recv_value, our_payment_hash, ev);
+       if !payment_claimable_expected {
+               args = args.without_claimable_event();
+       }
+       if let Some(payment_secret) = our_payment_secret {
+               args = args.with_payment_secret(payment_secret);
+       }
+       if let Some(payment_preimage) = expected_preimage {
+               args = args.with_payment_preimage(payment_preimage);
+       }
+       do_pass_along_path(args)
 }
 
 pub fn send_probe_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_route: &[&[&Node<'a, 'b, 'c>]]) {
@@ -2467,7 +2663,10 @@ pub fn send_probe_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expect
        for path in expected_route.iter() {
                let ev = remove_first_msg_event_to_node(&path[0].node.get_our_node_id(), &mut events);
 
-               do_pass_along_path(origin_node, path, 0, PaymentHash([0_u8; 32]), None, ev, false, false, None, true);
+               do_pass_along_path(PassAlongPathArgs::new(origin_node, path, 0, PaymentHash([0_u8; 32]), ev)
+                       .is_probe()
+                       .without_clearing_recipient_events());
+
                let nodes_to_fail_payment: Vec<_> = vec![origin_node].into_iter().chain(path.iter().cloned()).collect();
 
                fail_payment_along_path(nodes_to_fail_payment.as_slice());
@@ -2497,26 +2696,71 @@ pub fn do_claim_payment_along_route<'a, 'b, 'c>(
        origin_node: &Node<'a, 'b, 'c>, expected_paths: &[&[&Node<'a, 'b, 'c>]], skip_last: bool,
        our_payment_preimage: PaymentPreimage
 ) -> u64 {
-       let extra_fees = vec![0; expected_paths.len()];
-       do_claim_payment_along_route_with_extra_penultimate_hop_fees(origin_node, expected_paths,
-               &extra_fees[..], skip_last, our_payment_preimage)
-}
-
-pub fn do_claim_payment_along_route_with_extra_penultimate_hop_fees<'a, 'b, 'c>(
-       origin_node: &Node<'a, 'b, 'c>, expected_paths: &[&[&Node<'a, 'b, 'c>]], expected_extra_fees:
-       &[u32], skip_last: bool, our_payment_preimage: PaymentPreimage
-) -> u64 {
-       assert_eq!(expected_paths.len(), expected_extra_fees.len());
        for path in expected_paths.iter() {
                assert_eq!(path.last().unwrap().node.get_our_node_id(), expected_paths[0].last().unwrap().node.get_our_node_id());
        }
        expected_paths[0].last().unwrap().node.claim_funds(our_payment_preimage);
-       pass_claimed_payment_along_route(origin_node, expected_paths, expected_extra_fees, skip_last, our_payment_preimage)
+       pass_claimed_payment_along_route(
+               ClaimAlongRouteArgs::new(origin_node, expected_paths, our_payment_preimage)
+                       .skip_last(skip_last)
+       )
 }
 
-pub fn pass_claimed_payment_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, 'c>, expected_paths: &[&[&Node<'a, 'b, 'c>]], expected_extra_fees: &[u32], skip_last: bool, our_payment_preimage: PaymentPreimage) -> u64 {
+pub struct ClaimAlongRouteArgs<'a, 'b, 'c, 'd> {
+       pub origin_node: &'a Node<'b, 'c, 'd>,
+       pub expected_paths: &'a [&'a [&'a Node<'b, 'c, 'd>]],
+       pub expected_extra_fees: Vec<u32>,
+       pub expected_min_htlc_overpay: Vec<u32>,
+       pub skip_last: bool,
+       pub payment_preimage: PaymentPreimage,
+       // Allow forwarding nodes to have taken 1 msat more fee than expected based on the downstream
+       // fulfill amount.
+       //
+       // Necessary because our test utils calculate the expected fee for an intermediate node based on
+       // the amount was claimed in their downstream peer's fulfill, but blinded intermediate nodes
+       // calculate their fee based on the inbound amount from their upstream peer, causing a difference
+       // in rounding.
+       pub allow_1_msat_fee_overpay: bool,
+}
+
+impl<'a, 'b, 'c, 'd> ClaimAlongRouteArgs<'a, 'b, 'c, 'd> {
+       pub fn new(
+               origin_node: &'a Node<'b, 'c, 'd>, expected_paths: &'a [&'a [&'a Node<'b, 'c, 'd>]],
+               payment_preimage: PaymentPreimage,
+       ) -> Self {
+               Self {
+                       origin_node, expected_paths, expected_extra_fees: vec![0; expected_paths.len()],
+                       expected_min_htlc_overpay: vec![0; expected_paths.len()], skip_last: false, payment_preimage,
+                       allow_1_msat_fee_overpay: false,
+               }
+       }
+       pub fn skip_last(mut self, skip_last: bool) -> Self {
+               self.skip_last = skip_last;
+               self
+       }
+       pub fn with_expected_extra_fees(mut self, extra_fees: Vec<u32>) -> Self {
+               self.expected_extra_fees = extra_fees;
+               self
+       }
+       pub fn with_expected_min_htlc_overpay(mut self, extra_fees: Vec<u32>) -> Self {
+               self.expected_min_htlc_overpay = extra_fees;
+               self
+       }
+       pub fn allow_1_msat_fee_overpay(mut self) -> Self {
+               self.allow_1_msat_fee_overpay = true;
+               self
+       }
+}
+
+pub fn pass_claimed_payment_along_route<'a, 'b, 'c, 'd>(args: ClaimAlongRouteArgs) -> u64 {
+       let ClaimAlongRouteArgs {
+               origin_node, expected_paths, expected_extra_fees, expected_min_htlc_overpay, skip_last,
+               payment_preimage: our_payment_preimage, allow_1_msat_fee_overpay,
+       } = args;
        let claim_event = expected_paths[0].last().unwrap().node.get_and_clear_pending_events();
        assert_eq!(claim_event.len(), 1);
+       #[allow(unused)]
+       let mut fwd_amt_msat = 0;
        match claim_event[0] {
                Event::PaymentClaimed {
                        purpose: PaymentPurpose::SpontaneousPayment(preimage),
@@ -2533,6 +2777,7 @@ pub fn pass_claimed_payment_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, '
                        assert_eq!(htlcs.len(), expected_paths.len());  // One per path.
                        assert_eq!(htlcs.iter().map(|h| h.value_msat).sum::<u64>(), amount_msat);
                        expected_paths.iter().zip(htlcs).for_each(|(path, htlc)| check_claimed_htlc_channel(origin_node, path, htlc));
+                       fwd_amt_msat = amount_msat;
                },
                Event::PaymentClaimed {
                        purpose: PaymentPurpose::InvoicePayment { .. },
@@ -2545,6 +2790,7 @@ pub fn pass_claimed_payment_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, '
                        assert_eq!(htlcs.len(), expected_paths.len());  // One per path.
                        assert_eq!(htlcs.iter().map(|h| h.value_msat).sum::<u64>(), amount_msat);
                        expected_paths.iter().zip(htlcs).for_each(|(path, htlc)| check_claimed_htlc_channel(origin_node, path, htlc));
+                       fwd_amt_msat = amount_msat;
                }
                _ => panic!(),
        }
@@ -2576,8 +2822,12 @@ pub fn pass_claimed_payment_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, '
                per_path_msgs.push(msgs_from_ev!(&events[0]));
        } else {
                for expected_path in expected_paths.iter() {
-                       // For MPP payments, we always want the message to the first node in the path.
-                       let ev = remove_first_msg_event_to_node(&expected_path[0].node.get_our_node_id(), &mut events);
+                       // For MPP payments, we want the fulfill message from the payee to the penultimate hop in the
+                       // path.
+                       let penultimate_hop_node_id = expected_path.iter().rev().skip(1).next()
+                               .map(|n| n.node.get_our_node_id())
+                               .unwrap_or(origin_node.node.get_our_node_id());
+                       let ev = remove_first_msg_event_to_node(&penultimate_hop_node_id, &mut events);
                        per_path_msgs.push(msgs_from_ev!(&ev));
                }
        }
@@ -2601,19 +2851,34 @@ pub fn pass_claimed_payment_along_route<'a, 'b, 'c>(origin_node: &Node<'a, 'b, '
                                {
                                        $node.node.handle_update_fulfill_htlc(&$prev_node.node.get_our_node_id(), &next_msgs.as_ref().unwrap().0);
                                        let mut fee = {
-                                               let per_peer_state = $node.node.per_peer_state.read().unwrap();
-                                               let peer_state = per_peer_state.get(&$prev_node.node.get_our_node_id())
-                                                       .unwrap().lock().unwrap();
-                                               let channel = peer_state.channel_by_id.get(&next_msgs.as_ref().unwrap().0.channel_id).unwrap();
-                                               if let Some(prev_config) = channel.context().prev_config() {
-                                                       prev_config.forwarding_fee_base_msat
-                                               } else {
-                                                       channel.context().config().forwarding_fee_base_msat
-                                               }
+                                               let (base_fee, prop_fee) = {
+                                                       let per_peer_state = $node.node.per_peer_state.read().unwrap();
+                                                       let peer_state = per_peer_state.get(&$prev_node.node.get_our_node_id())
+                                                               .unwrap().lock().unwrap();
+                                                       let channel = peer_state.channel_by_id.get(&next_msgs.as_ref().unwrap().0.channel_id).unwrap();
+                                                       if let Some(prev_config) = channel.context().prev_config() {
+                                                               (prev_config.forwarding_fee_base_msat as u64,
+                                                                prev_config.forwarding_fee_proportional_millionths as u64)
+                                                       } else {
+                                                               (channel.context().config().forwarding_fee_base_msat as u64,
+                                                                channel.context().config().forwarding_fee_proportional_millionths as u64)
+                                                       }
+                                               };
+                                               ((fwd_amt_msat * prop_fee / 1_000_000) + base_fee) as u32
                                        };
-                                       if $idx == 1 { fee += expected_extra_fees[i]; }
-                                       expect_payment_forwarded!(*$node, $next_node, $prev_node, Some(fee as u64), false, false);
-                                       expected_total_fee_msat += fee as u64;
+
+                                       let mut expected_extra_fee = None;
+                                       if $idx == 1 {
+                                               fee += expected_extra_fees[i];
+                                               fee += expected_min_htlc_overpay[i];
+                                               expected_extra_fee = if expected_extra_fees[i] > 0 { Some(expected_extra_fees[i] as u64) } else { None };
+                                       }
+                                       let mut events = $node.node.get_and_clear_pending_events();
+                                       assert_eq!(events.len(), 1);
+                                       let actual_fee = expect_payment_forwarded(events.pop().unwrap(), *$node, $next_node, $prev_node,
+                                               Some(fee as u64), expected_extra_fee, false, false, allow_1_msat_fee_overpay);
+                                       expected_total_fee_msat += actual_fee.unwrap();
+                                       fwd_amt_msat += actual_fee.unwrap();
                                        check_added_monitors!($node, 1);
                                        let new_next_msgs = if $new_msgs {
                                                let events = $node.node.get_and_clear_pending_msg_events();
@@ -2878,7 +3143,8 @@ pub fn create_node_cfgs_with_persisters<'a>(node_count: usize, chanmon_cfgs: &'a
                        logger: &chanmon_cfgs[i].logger,
                        tx_broadcaster: &chanmon_cfgs[i].tx_broadcaster,
                        fee_estimator: &chanmon_cfgs[i].fee_estimator,
-                       router: test_utils::TestRouter::new(network_graph.clone(), &chanmon_cfgs[i].scorer),
+                       router: test_utils::TestRouter::new(network_graph.clone(), &chanmon_cfgs[i].logger, &chanmon_cfgs[i].scorer),
+                       message_router: test_utils::TestMessageRouter::new(network_graph.clone(), &chanmon_cfgs[i].keys_manager),
                        chain_monitor,
                        keys_manager: &chanmon_cfgs[i].keys_manager,
                        node_seed: seed,
@@ -2932,6 +3198,11 @@ pub fn create_network<'a, 'b: 'a, 'c: 'b>(node_count: usize, cfgs: &'b Vec<NodeC
        let connect_style = Rc::new(RefCell::new(ConnectStyle::random_style()));
 
        for i in 0..node_count {
+               let dedicated_entropy = DedicatedEntropy(RandomBytes::new([i as u8; 32]));
+               let onion_messenger = OnionMessenger::new(
+                       dedicated_entropy, cfgs[i].keys_manager, cfgs[i].logger, &chan_mgrs[i],
+                       &cfgs[i].message_router, &chan_mgrs[i], IgnoringMessageHandler {},
+               );
                let gossip_sync = P2PGossipSync::new(cfgs[i].network_graph.as_ref(), None, cfgs[i].logger);
                let wallet_source = Arc::new(test_utils::TestWalletSource::new(SecretKey::from_slice(&[i as u8 + 1; 32]).unwrap()));
                nodes.push(Node{
@@ -2939,7 +3210,7 @@ pub fn create_network<'a, 'b: 'a, 'c: 'b>(node_count: usize, cfgs: &'b Vec<NodeC
                        fee_estimator: cfgs[i].fee_estimator, router: &cfgs[i].router,
                        chain_monitor: &cfgs[i].chain_monitor, keys_manager: &cfgs[i].keys_manager,
                        node: &chan_mgrs[i], network_graph: cfgs[i].network_graph.as_ref(), gossip_sync,
-                       node_seed: cfgs[i].node_seed, network_chan_count: chan_count.clone(),
+                       node_seed: cfgs[i].node_seed, onion_messenger, network_chan_count: chan_count.clone(),
                        network_payment_count: payment_count.clone(), logger: cfgs[i].logger,
                        blocks: Arc::clone(&cfgs[i].tx_broadcaster.blocks),
                        connect_style: Rc::clone(&connect_style),
@@ -2954,22 +3225,52 @@ pub fn create_network<'a, 'b: 'a, 'c: 'b>(node_count: usize, cfgs: &'b Vec<NodeC
 
        for i in 0..node_count {
                for j in (i+1)..node_count {
-                       nodes[i].node.peer_connected(&nodes[j].node.get_our_node_id(), &msgs::Init {
-                               features: nodes[j].override_init_features.borrow().clone().unwrap_or_else(|| nodes[j].node.init_features()),
+                       let node_id_i = nodes[i].node.get_our_node_id();
+                       let node_id_j = nodes[j].node.get_our_node_id();
+
+                       let init_i = msgs::Init {
+                               features: nodes[i].init_features(&node_id_j),
                                networks: None,
                                remote_network_address: None,
-                       }, true).unwrap();
-                       nodes[j].node.peer_connected(&nodes[i].node.get_our_node_id(), &msgs::Init {
-                               features: nodes[i].override_init_features.borrow().clone().unwrap_or_else(|| nodes[i].node.init_features()),
+                       };
+                       let init_j = msgs::Init {
+                               features: nodes[j].init_features(&node_id_i),
                                networks: None,
                                remote_network_address: None,
-                       }, false).unwrap();
+                       };
+
+                       nodes[i].node.peer_connected(&node_id_j, &init_j, true).unwrap();
+                       nodes[j].node.peer_connected(&node_id_i, &init_i, false).unwrap();
+                       nodes[i].onion_messenger.peer_connected(&node_id_j, &init_j, true).unwrap();
+                       nodes[j].onion_messenger.peer_connected(&node_id_i, &init_i, false).unwrap();
                }
        }
 
        nodes
 }
 
+pub fn connect_dummy_node<'a, 'b: 'a, 'c: 'b>(node: &Node<'a, 'b, 'c>) {
+       let node_id_dummy = PublicKey::from_slice(&[2; 33]).unwrap();
+
+       let mut dummy_init_features = InitFeatures::empty();
+       dummy_init_features.set_static_remote_key_required();
+
+       let init_dummy = msgs::Init {
+               features: dummy_init_features,
+               networks: None,
+               remote_network_address: None
+       };
+
+       node.node.peer_connected(&node_id_dummy, &init_dummy, true).unwrap();
+       node.onion_messenger.peer_connected(&node_id_dummy, &init_dummy, true).unwrap();
+}
+
+pub fn disconnect_dummy_node<'a, 'b: 'a, 'c: 'b>(node: &Node<'a, 'b, 'c>) {
+       let node_id_dummy = PublicKey::from_slice(&[2; 33]).unwrap();
+       node.node.peer_disconnected(&node_id_dummy);
+       node.onion_messenger.peer_disconnected(&node_id_dummy);
+}
+
 // Note that the following only works for CLTV values up to 128
 pub const ACCEPTED_HTLC_SCRIPT_WEIGHT: usize = 137; // Here we have a diff due to HTLC CLTV expiry being < 2^15 in test
 pub const ACCEPTED_HTLC_SCRIPT_WEIGHT_ANCHORS: usize = 140; // Here we have a diff due to HTLC CLTV expiry being < 2^15 in test
@@ -2989,7 +3290,7 @@ pub enum HTLCType { NONE, TIMEOUT, SUCCESS }
 /// also fail.
 pub fn test_txn_broadcast<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, chan: &(msgs::ChannelUpdate, msgs::ChannelUpdate, ChannelId, Transaction), commitment_tx: Option<Transaction>, has_htlc_tx: HTLCType) -> Vec<Transaction>  {
        let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
-       let mut txn_seen = HashSet::new();
+       let mut txn_seen = new_hash_set();
        node_txn.retain(|tx| txn_seen.insert(tx.txid()));
        assert!(node_txn.len() >= if commitment_tx.is_some() { 0 } else { 1 } + if has_htlc_tx == HTLCType::NONE { 0 } else { 1 });
 
@@ -3054,7 +3355,7 @@ pub fn test_revoked_htlc_claim_txn_broadcast<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>
 
 pub fn check_preimage_claim<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, prev_txn: &Vec<Transaction>) -> Vec<Transaction>  {
        let mut node_txn = node.tx_broadcaster.txn_broadcasted.lock().unwrap();
-       let mut txn_seen = HashSet::new();
+       let mut txn_seen = new_hash_set();
        node_txn.retain(|tx| txn_seen.insert(tx.txid()));
 
        let mut found_prev = false;
@@ -3081,15 +3382,21 @@ pub fn check_preimage_claim<'a, 'b, 'c>(node: &Node<'a, 'b, 'c>, prev_txn: &Vec<
 }
 
 pub fn handle_announce_close_broadcast_events<'a, 'b, 'c>(nodes: &Vec<Node<'a, 'b, 'c>>, a: usize, b: usize, needs_err_handle: bool, expected_error: &str)  {
+       let mut dummy_connected = false;
+       if !is_any_peer_connected(&nodes[a]) {
+               connect_dummy_node(&nodes[a]);
+               dummy_connected = true
+       }
+
        let events_1 = nodes[a].node.get_and_clear_pending_msg_events();
        assert_eq!(events_1.len(), 2);
-       let as_update = match events_1[0] {
+       let as_update = match events_1[1] {
                MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
                        msg.clone()
                },
                _ => panic!("Unexpected event"),
        };
-       match events_1[1] {
+       match events_1[0] {
                MessageSendEvent::HandleError { node_id, action: msgs::ErrorAction::SendErrorMessage { ref msg } } => {
                        assert_eq!(node_id, nodes[b].node.get_our_node_id());
                        assert_eq!(msg.data, expected_error);
@@ -3106,17 +3413,24 @@ pub fn handle_announce_close_broadcast_events<'a, 'b, 'c>(nodes: &Vec<Node<'a, '
                },
                _ => panic!("Unexpected event"),
        }
-
+       if dummy_connected {
+               disconnect_dummy_node(&nodes[a]);
+               dummy_connected = false;
+       }
+       if !is_any_peer_connected(&nodes[b]) {
+               connect_dummy_node(&nodes[b]);
+               dummy_connected = true;
+       }
        let events_2 = nodes[b].node.get_and_clear_pending_msg_events();
        assert_eq!(events_2.len(), if needs_err_handle { 1 } else { 2 });
-       let bs_update = match events_2[0] {
+       let bs_update = match events_2.last().unwrap() {
                MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
                        msg.clone()
                },
                _ => panic!("Unexpected event"),
        };
        if !needs_err_handle {
-               match events_2[1] {
+               match events_2[0] {
                        MessageSendEvent::HandleError { node_id, action: msgs::ErrorAction::SendErrorMessage { ref msg } } => {
                                assert_eq!(node_id, nodes[a].node.get_our_node_id());
                                assert_eq!(msg.data, expected_error);
@@ -3128,7 +3442,9 @@ pub fn handle_announce_close_broadcast_events<'a, 'b, 'c>(nodes: &Vec<Node<'a, '
                        _ => panic!("Unexpected event"),
                }
        }
-
+       if dummy_connected {
+               disconnect_dummy_node(&nodes[b]);
+       }
        for node in nodes {
                node.gossip_sync.handle_channel_update(&as_update).unwrap();
                node.gossip_sync.handle_channel_update(&bs_update).unwrap();
@@ -3154,7 +3470,7 @@ macro_rules! get_channel_value_stat {
 macro_rules! get_chan_reestablish_msgs {
        ($src_node: expr, $dst_node: expr) => {
                {
-                       let mut announcements = $crate::prelude::HashSet::new();
+                       let mut announcements = $crate::prelude::new_hash_set();
                        let mut res = Vec::with_capacity(1);
                        for msg in $src_node.node.get_and_clear_pending_msg_events() {
                                if let MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } = msg {