Merge pull request #977 from TheBlueMatt/2021-06-fix-double-claim-close
[rust-lightning] / lightning / src / ln / functional_tests.rs
index 0471cd081182af4e0fad028ca5d044e02b0fcc95..a13b06d8d993f34a80f61e5ffe11a8876bf8ba66 100644 (file)
@@ -12,8 +12,7 @@
 //! claim outputs on-chain.
 
 use chain;
-use chain::Listen;
-use chain::Watch;
+use chain::{Confirm, Listen, Watch};
 use chain::channelmonitor;
 use chain::channelmonitor::{ChannelMonitor, CLTV_CLAIM_BUFFER, LATENCY_GRACE_PERIOD_BLOCKS, ANTI_REORG_DELAY};
 use chain::transaction::OutPoint;
@@ -23,13 +22,15 @@ use ln::channel::{COMMITMENT_TX_BASE_WEIGHT, COMMITMENT_TX_WEIGHT_PER_HTLC};
 use ln::channelmanager::{ChannelManager, ChannelManagerReadArgs, RAACommitmentOrder, PaymentSendFailure, BREAKDOWN_TIMEOUT, MIN_CLTV_EXPIRY_DELTA};
 use ln::channel::{Channel, ChannelError};
 use ln::{chan_utils, onion_utils};
-use routing::router::{Route, RouteHop, get_route};
+use ln::chan_utils::HTLC_SUCCESS_TX_WEIGHT;
+use routing::router::{Route, RouteHop, RouteHint, RouteHintHop, get_route, get_keysend_route};
+use routing::network_graph::RoutingFees;
 use ln::features::{ChannelFeatures, InitFeatures, InvoiceFeatures, NodeFeatures};
 use ln::msgs;
 use ln::msgs::{ChannelMessageHandler,RoutingMessageHandler,HTLCFailChannelUpdate, ErrorAction};
 use util::enforcing_trait_impls::EnforcingSigner;
 use util::{byte_utils, test_utils};
-use util::events::{Event, MessageSendEvent, MessageSendEventsProvider};
+use util::events::{Event, MessageSendEvent, MessageSendEventsProvider, PaymentPurpose};
 use util::errors::APIError;
 use util::ser::{Writeable, ReadableArgs};
 use util::config::UserConfig;
@@ -53,7 +54,7 @@ use regex;
 use prelude::*;
 use alloc::collections::BTreeSet;
 use core::default::Default;
-use std::sync::{Arc, Mutex};
+use sync::{Arc, Mutex};
 
 use ln::functional_test_utils::*;
 use ln::chan_utils::CommitmentTransaction;
@@ -1040,7 +1041,8 @@ fn do_test_shutdown_rebroadcast(recv_count: u8) {
                nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &InitFeatures::known(), &node_1_2nd_shutdown);
                node_0_2nd_shutdown
        } else {
-               assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
+               let node_0_chan_update = get_event_msg!(nodes[0], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
+               assert_eq!(node_0_chan_update.contents.flags & 2, 0); // "disabled" flag must not be set as we just reconnected.
                nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &InitFeatures::known(), &node_1_2nd_shutdown);
                get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id())
        };
@@ -1360,15 +1362,7 @@ fn holding_cell_htlc_counting() {
        nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &bs_fail_updates.update_fail_htlcs[0]);
        commitment_signed_dance!(nodes[0], nodes[1], bs_fail_updates.commitment_signed, false, true);
 
-       let events = nodes[0].node.get_and_clear_pending_msg_events();
-       assert_eq!(events.len(), 1);
-       match events[0] {
-               MessageSendEvent::PaymentFailureNetworkUpdate { update: msgs::HTLCFailChannelUpdate::ChannelUpdateMessage { ref msg }} => {
-                       assert_eq!(msg.contents.short_channel_id, chan_2.0.contents.short_channel_id);
-               },
-               _ => panic!("Unexpected event"),
-       }
-
+       expect_payment_failure_chan_update!(nodes[0], chan_2.0.contents.short_channel_id, false);
        expect_payment_failed!(nodes[0], payment_hash_2, false);
 
        // Now forward all the pending HTLCs and claim them back
@@ -1591,7 +1585,7 @@ fn test_fee_spike_violation_fails_htlc() {
        let cur_height = nodes[1].node.best_block.read().unwrap().height() + 1;
 
        let onion_keys = onion_utils::construct_onion_keys(&secp_ctx, &route.paths[0], &session_priv).unwrap();
-       let (onion_payloads, htlc_msat, htlc_cltv) = onion_utils::build_onion_payloads(&route.paths[0], 3460001, &Some(payment_secret), cur_height).unwrap();
+       let (onion_payloads, htlc_msat, htlc_cltv) = onion_utils::build_onion_payloads(&route.paths[0], 3460001, &Some(payment_secret), cur_height, &None).unwrap();
        let onion_packet = onion_utils::construct_onion_packet(onion_payloads, onion_keys, [0; 32], &payment_hash);
        let msg = msgs::UpdateAddHTLC {
                channel_id: chan.2,
@@ -1694,7 +1688,8 @@ fn test_fee_spike_violation_fails_htlc() {
                },
                _ => panic!("Unexpected event"),
        };
-       nodes[1].logger.assert_log("lightning::ln::channel".to_string(), "Attempting to fail HTLC due to fee spike buffer violation".to_string(), 1);
+       nodes[1].logger.assert_log("lightning::ln::channel".to_string(),
+               format!("Attempting to fail HTLC due to fee spike buffer violation in channel {}. Rebalancing is required.", ::hex::encode(raa_msg.channel_id)), 1);
 
        check_added_monitors!(nodes[1], 2);
 }
@@ -1706,14 +1701,24 @@ fn test_chan_reserve_violation_outbound_htlc_inbound_chan() {
        // sending any above-dust amount would result in a channel reserve violation.
        // In this test we check that we would be prevented from sending an HTLC in
        // this situation.
-       chanmon_cfgs[0].fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: 6000 };
-       chanmon_cfgs[1].fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: 6000 };
+       let feerate_per_kw = 253;
+       chanmon_cfgs[0].fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(feerate_per_kw) };
+       chanmon_cfgs[1].fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(feerate_per_kw) };
        let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
        let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
        let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
-       let _ = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 95000000, InitFeatures::known(), InitFeatures::known());
 
-       let (route, our_payment_hash, _, our_payment_secret) = get_route_and_payment_hash!(nodes[1], nodes[0], 4843000);
+       let mut push_amt = 100_000_000;
+       push_amt -= feerate_per_kw as u64 * (COMMITMENT_TX_BASE_WEIGHT + COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000 * 1000;
+       push_amt -= Channel::<EnforcingSigner>::get_holder_selected_channel_reserve_satoshis(100_000) * 1000;
+
+       let _ = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100_000, push_amt, InitFeatures::known(), InitFeatures::known());
+
+       // Sending exactly enough to hit the reserve amount should be accepted
+       let (_, _, _) = route_payment(&nodes[1], &[&nodes[0]], 1_000_000);
+
+       // However one more HTLC should be significantly over the reserve amount and fail.
+       let (route, our_payment_hash, _, our_payment_secret) = get_route_and_payment_hash!(nodes[1], nodes[0], 1_000_000);
        unwrap_send_err!(nodes[1].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)), true, APIError::ChannelUnavailable { ref err },
                assert_eq!(err, "Cannot send value that would put counterparty balance under holder-announced channel reserve value"));
        assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
@@ -1728,8 +1733,8 @@ fn test_chan_reserve_violation_inbound_htlc_outbound_channel() {
        // to channel reserve violation. This close could also happen if the fee went
        // up a more realistic amount, but many HTLCs were outstanding at the time of
        // the update_add_htlc.
-       chanmon_cfgs[0].fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: 6000 };
-       chanmon_cfgs[1].fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: 6000 };
+       chanmon_cfgs[0].fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(6000) };
+       chanmon_cfgs[1].fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(6000) };
        let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
        let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
        let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
@@ -1741,7 +1746,7 @@ fn test_chan_reserve_violation_inbound_htlc_outbound_channel() {
        let session_priv = SecretKey::from_slice(&[42; 32]).unwrap();
        let cur_height = nodes[1].node.best_block.read().unwrap().height() + 1;
        let onion_keys = onion_utils::construct_onion_keys(&secp_ctx, &route.paths[0], &session_priv).unwrap();
-       let (onion_payloads, htlc_msat, htlc_cltv) = onion_utils::build_onion_payloads(&route.paths[0], 1000, &Some(payment_secret), cur_height).unwrap();
+       let (onion_payloads, htlc_msat, htlc_cltv) = onion_utils::build_onion_payloads(&route.paths[0], 1000, &Some(payment_secret), cur_height, &None).unwrap();
        let onion_packet = onion_utils::construct_onion_packet(onion_payloads, onion_keys, [0; 32], &payment_hash);
        let msg = msgs::UpdateAddHTLC {
                channel_id: chan.2,
@@ -1765,7 +1770,11 @@ fn test_chan_reserve_violation_inbound_htlc_outbound_channel() {
 fn test_chan_reserve_dust_inbound_htlcs_outbound_chan() {
        // Test that if we receive many dust HTLCs over an outbound channel, they don't count when
        // calculating our commitment transaction fee (this was previously broken).
-       let chanmon_cfgs = create_chanmon_cfgs(2);
+       let mut chanmon_cfgs = create_chanmon_cfgs(2);
+       let feerate_per_kw = 253;
+       chanmon_cfgs[0].fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(feerate_per_kw) };
+       chanmon_cfgs[1].fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(feerate_per_kw) };
+
        let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
        let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None, None]);
        let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
@@ -1773,13 +1782,22 @@ fn test_chan_reserve_dust_inbound_htlcs_outbound_chan() {
        // Set nodes[0]'s balance such that they will consider any above-dust received HTLC to be a
        // channel reserve violation (so their balance is channel reserve (1000 sats) + commitment
        // transaction fee with 0 HTLCs (183 sats)).
-       create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 98817000, InitFeatures::known(), InitFeatures::known());
+       let mut push_amt = 100_000_000;
+       push_amt -= feerate_per_kw as u64 * (COMMITMENT_TX_BASE_WEIGHT) / 1000 * 1000;
+       push_amt -= Channel::<EnforcingSigner>::get_holder_selected_channel_reserve_satoshis(100_000) * 1000;
+       create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, push_amt, InitFeatures::known(), InitFeatures::known());
 
-       let dust_amt = 329000; // Dust amount
+       let dust_amt = crate::ln::channel::MIN_DUST_LIMIT_SATOSHIS * 1000
+               + feerate_per_kw as u64 * HTLC_SUCCESS_TX_WEIGHT / 1000 * 1000 - 1;
        // In the previous code, routing this dust payment would cause nodes[0] to perceive a channel
        // reserve violation even though it's a dust HTLC and therefore shouldn't count towards the
        // commitment transaction fee.
        let (_, _, _) = route_payment(&nodes[1], &[&nodes[0]], dust_amt);
+
+       // One more than the dust amt should fail, however.
+       let (route, our_payment_hash, _, our_payment_secret) = get_route_and_payment_hash!(nodes[1], nodes[0], dust_amt + 1);
+       unwrap_send_err!(nodes[1].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)), true, APIError::ChannelUnavailable { ref err },
+               assert_eq!(err, "Cannot send value that would put counterparty balance under holder-announced channel reserve value"));
 }
 
 #[test]
@@ -1854,7 +1872,7 @@ fn test_chan_reserve_violation_inbound_htlc_inbound_chan() {
        let session_priv = SecretKey::from_slice(&[42; 32]).unwrap();
        let cur_height = nodes[0].node.best_block.read().unwrap().height() + 1;
        let onion_keys = onion_utils::construct_onion_keys(&secp_ctx, &route_2.paths[0], &session_priv).unwrap();
-       let (onion_payloads, htlc_msat, htlc_cltv) = onion_utils::build_onion_payloads(&route_2.paths[0], recv_value_2, &None, cur_height).unwrap();
+       let (onion_payloads, htlc_msat, htlc_cltv) = onion_utils::build_onion_payloads(&route_2.paths[0], recv_value_2, &None, cur_height, &None).unwrap();
        let onion_packet = onion_utils::construct_onion_packet(onion_payloads, onion_keys, [0; 32], &our_payment_hash_1);
        let msg = msgs::UpdateAddHTLC {
                channel_id: chan.2,
@@ -1886,11 +1904,12 @@ fn test_inbound_outbound_capacity_is_not_zero() {
        assert_eq!(channels0.len(), 1);
        assert_eq!(channels1.len(), 1);
 
-       assert_eq!(channels0[0].inbound_capacity_msat, 95000000);
-       assert_eq!(channels1[0].outbound_capacity_msat, 95000000);
+       let reserve = Channel::<EnforcingSigner>::get_holder_selected_channel_reserve_satoshis(100000);
+       assert_eq!(channels0[0].inbound_capacity_msat, 95000000 - reserve*1000);
+       assert_eq!(channels1[0].outbound_capacity_msat, 95000000 - reserve*1000);
 
-       assert_eq!(channels0[0].outbound_capacity_msat, 100000 * 1000 - 95000000);
-       assert_eq!(channels1[0].inbound_capacity_msat, 100000 * 1000 - 95000000);
+       assert_eq!(channels0[0].outbound_capacity_msat, 100000 * 1000 - 95000000 - reserve*1000);
+       assert_eq!(channels1[0].inbound_capacity_msat, 100000 * 1000 - 95000000 - reserve*1000);
 }
 
 fn commit_tx_fee_msat(feerate: u32, num_htlcs: u64) -> u64 {
@@ -1901,7 +1920,11 @@ fn commit_tx_fee_msat(feerate: u32, num_htlcs: u64) -> u64 {
 fn test_channel_reserve_holding_cell_htlcs() {
        let chanmon_cfgs = create_chanmon_cfgs(3);
        let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
-       let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
+       // When this test was written, the default base fee floated based on the HTLC count.
+       // It is now fixed, so we simply set the fee to the expected value here.
+       let mut config = test_default_channel_config();
+       config.channel_options.forwarding_fee_base_msat = 239;
+       let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[Some(config.clone()), Some(config.clone()), Some(config.clone())]);
        let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
        let chan_1 = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 190000, 1001, InitFeatures::known(), InitFeatures::known());
        let chan_2 = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 190000, 1001, InitFeatures::known(), InitFeatures::known());
@@ -1922,7 +1945,7 @@ fn test_channel_reserve_holding_cell_htlcs() {
                }}
        }
 
-       let feemsat = 239; // somehow we know?
+       let feemsat = 239; // set above
        let total_fee_msat = (nodes.len() - 2) as u64 * feemsat;
        let feerate = get_feerate!(nodes[0], chan_1.2);
 
@@ -2082,20 +2105,30 @@ fn test_channel_reserve_holding_cell_htlcs() {
        let events = nodes[2].node.get_and_clear_pending_events();
        assert_eq!(events.len(), 2);
        match events[0] {
-               Event::PaymentReceived { ref payment_hash, ref payment_preimage, ref payment_secret, amt, user_payment_id: _ } => {
+               Event::PaymentReceived { ref payment_hash, ref purpose, amt } => {
                        assert_eq!(our_payment_hash_21, *payment_hash);
-                       assert!(payment_preimage.is_none());
-                       assert_eq!(our_payment_secret_21, *payment_secret);
                        assert_eq!(recv_value_21, amt);
+                       match &purpose {
+                               PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
+                                       assert!(payment_preimage.is_none());
+                                       assert_eq!(our_payment_secret_21, *payment_secret);
+                               },
+                               _ => panic!("expected PaymentPurpose::InvoicePayment")
+                       }
                },
                _ => panic!("Unexpected event"),
        }
        match events[1] {
-               Event::PaymentReceived { ref payment_hash, ref payment_preimage, ref payment_secret, amt, user_payment_id: _ } => {
+               Event::PaymentReceived { ref payment_hash, ref purpose, amt } => {
                        assert_eq!(our_payment_hash_22, *payment_hash);
-                       assert!(payment_preimage.is_none());
-                       assert_eq!(our_payment_secret_22, *payment_secret);
                        assert_eq!(recv_value_22, amt);
+                       match &purpose {
+                               PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
+                                       assert!(payment_preimage.is_none());
+                                       assert_eq!(our_payment_secret_22, *payment_secret);
+                               },
+                               _ => panic!("expected PaymentPurpose::InvoicePayment")
+                       }
                },
                _ => panic!("Unexpected event"),
        }
@@ -3008,10 +3041,16 @@ fn do_test_htlc_on_chain_timeout(connect_style: ConnectStyle) {
 
        connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
        {
-               // B will rebroadcast its own holder commitment transaction here...just because
+               // B may rebroadcast its own holder commitment transaction here, as a safeguard against
+               // some incredibly unlikely partial-eclipse-attack scenarios. That said, because the
+               // original commitment_tx[0] (also spending chan_2.3) has reached ANTI_REORG_DELAY B really
+               // shouldn't broadcast anything here, and in some connect style scenarios we do not.
                let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
-               assert_eq!(node_txn.len(), 1);
-               check_spends!(node_txn[0], chan_2.3);
+               if node_txn.len() == 1 {
+                       check_spends!(node_txn[0], chan_2.3);
+               } else {
+                       assert_eq!(node_txn.len(), 0);
+               }
        }
 
        expect_pending_htlcs_forwardable!(nodes[1]);
@@ -3094,13 +3133,7 @@ fn test_simple_commitment_revoked_fail_backward() {
 
                        nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &update_fail_htlcs[0]);
                        commitment_signed_dance!(nodes[0], nodes[1], commitment_signed, false, true);
-
-                       let events = nodes[0].node.get_and_clear_pending_msg_events();
-                       assert_eq!(events.len(), 1);
-                       match events[0] {
-                               MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
-                               _ => panic!("Unexpected event"),
-                       }
+                       expect_payment_failure_chan_update!(nodes[0], chan_2.0.contents.short_channel_id, true);
                        expect_payment_failed!(nodes[0], payment_hash, false);
                },
                _ => panic!("Unexpected event"),
@@ -3388,7 +3421,7 @@ fn fail_backward_pending_htlc_upon_channel_failure() {
                let current_height = nodes[1].node.best_block.read().unwrap().height() + 1;
                let net_graph_msg_handler = &nodes[1].net_graph_msg_handler;
                let route = get_route(&nodes[1].node.get_our_node_id(), &net_graph_msg_handler.network_graph.read().unwrap(), &nodes[0].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 50_000, TEST_FINAL_CLTV, &logger).unwrap();
-               let (onion_payloads, _amount_msat, cltv_expiry) = onion_utils::build_onion_payloads(&route.paths[0], 50_000, &Some(payment_secret), current_height).unwrap();
+               let (onion_payloads, _amount_msat, cltv_expiry) = onion_utils::build_onion_payloads(&route.paths[0], 50_000, &Some(payment_secret), current_height, &None).unwrap();
                let onion_keys = onion_utils::construct_onion_keys(&secp_ctx, &route.paths[0], &session_priv).unwrap();
                let onion_routing_packet = onion_utils::construct_onion_packet(onion_payloads, onion_keys, [0; 32], &payment_hash);
 
@@ -3544,7 +3577,7 @@ fn test_dup_events_on_peer_disconnect() {
        nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
        nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
 
-       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (1, 0), (0, 0), (0, 0), (false, false));
+       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (1, 0), (0, 0), (0, 0), (0, 0), (false, false));
        assert!(nodes[0].node.get_and_clear_pending_events().is_empty());
 }
 
@@ -3560,7 +3593,7 @@ fn test_simple_peer_disconnect() {
 
        nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
        nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
-       reconnect_nodes(&nodes[0], &nodes[1], (true, true), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
+       reconnect_nodes(&nodes[0], &nodes[1], (true, true), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 
        let payment_preimage_1 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 1000000).0;
        let payment_hash_2 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 1000000).1;
@@ -3569,7 +3602,7 @@ fn test_simple_peer_disconnect() {
 
        nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
        nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
-       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
+       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 
        let payment_preimage_3 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 1000000).0;
        let payment_preimage_4 = route_payment(&nodes[0], &vec!(&nodes[1], &nodes[2])[..], 1000000).0;
@@ -3582,7 +3615,7 @@ fn test_simple_peer_disconnect() {
        claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], true, payment_preimage_3);
        fail_payment_along_route(&nodes[0], &[&nodes[1], &nodes[2]], true, payment_hash_5);
 
-       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (1, 0), (1, 0), (false, false));
+       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (1, 0), (1, 0), (false, false));
        {
                let events = nodes[0].node.get_and_clear_pending_events();
                assert_eq!(events.len(), 2);
@@ -3686,19 +3719,19 @@ fn do_test_drop_messages_peer_disconnect(messages_delivered: u8, simulate_broken
                }
                // Even if the funding_locked messages get exchanged, as long as nothing further was
                // received on either side, both sides will need to resend them.
-               reconnect_nodes(&nodes[0], &nodes[1], (true, true), (0, 1), (0, 0), (0, 0), (0, 0), (false, false));
+               reconnect_nodes(&nodes[0], &nodes[1], (true, true), (0, 1), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
        } else if messages_delivered == 3 {
                // nodes[0] still wants its RAA + commitment_signed
-               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (-1, 0), (0, 0), (0, 0), (0, 0), (true, false));
+               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (-1, 0), (0, 0), (0, 0), (0, 0), (0, 0), (true, false));
        } else if messages_delivered == 4 {
                // nodes[0] still wants its commitment_signed
-               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (-1, 0), (0, 0), (0, 0), (0, 0), (false, false));
+               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (-1, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
        } else if messages_delivered == 5 {
                // nodes[1] still wants its final RAA
-               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (false, true));
+               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, true));
        } else if messages_delivered == 6 {
                // Everything was delivered...
-               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
+               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
        }
 
        let events_1 = nodes[1].node.get_and_clear_pending_events();
@@ -3710,18 +3743,23 @@ fn do_test_drop_messages_peer_disconnect(messages_delivered: u8, simulate_broken
 
        nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
        nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
-       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
+       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 
        nodes[1].node.process_pending_htlc_forwards();
 
        let events_2 = nodes[1].node.get_and_clear_pending_events();
        assert_eq!(events_2.len(), 1);
        match events_2[0] {
-               Event::PaymentReceived { ref payment_hash, ref payment_preimage, ref payment_secret, amt, user_payment_id: _ } => {
+               Event::PaymentReceived { ref payment_hash, ref purpose, amt } => {
                        assert_eq!(payment_hash_1, *payment_hash);
-                       assert!(payment_preimage.is_none());
-                       assert_eq!(payment_secret_1, *payment_secret);
                        assert_eq!(amt, 1000000);
+                       match &purpose {
+                               PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
+                                       assert!(payment_preimage.is_none());
+                                       assert_eq!(payment_secret_1, *payment_secret);
+                               },
+                               _ => panic!("expected PaymentPurpose::InvoicePayment")
+                       }
                },
                _ => panic!("Unexpected event"),
        }
@@ -3785,7 +3823,7 @@ fn do_test_drop_messages_peer_disconnect(messages_delivered: u8, simulate_broken
        nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
        nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
        if messages_delivered < 2 {
-               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (1, 0), (0, 0), (0, 0), (false, false));
+               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (1, 0), (0, 0), (0, 0), (0, 0), (false, false));
                if messages_delivered < 1 {
                        let events_4 = nodes[0].node.get_and_clear_pending_events();
                        assert_eq!(events_4.len(), 1);
@@ -3800,21 +3838,21 @@ fn do_test_drop_messages_peer_disconnect(messages_delivered: u8, simulate_broken
                }
        } else if messages_delivered == 2 {
                // nodes[0] still wants its RAA + commitment_signed
-               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, -1), (0, 0), (0, 0), (0, 0), (false, true));
+               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, -1), (0, 0), (0, 0), (0, 0), (0, 0), (false, true));
        } else if messages_delivered == 3 {
                // nodes[0] still wants its commitment_signed
-               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, -1), (0, 0), (0, 0), (0, 0), (false, false));
+               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, -1), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
        } else if messages_delivered == 4 {
                // nodes[1] still wants its final RAA
-               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (true, false));
+               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (true, false));
        } else if messages_delivered == 5 {
                // Everything was delivered...
-               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
+               reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
        }
 
        nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
        nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
-       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
+       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 
        // Channel should still work fine...
        let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
@@ -3866,7 +3904,7 @@ fn test_funding_peer_disconnect() {
                _ => panic!("Unexpected event"),
        }
 
-       reconnect_nodes(&nodes[0], &nodes[1], (false, true), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
+       reconnect_nodes(&nodes[0], &nodes[1], (false, true), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 
        nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
        nodes[1].node.peer_disconnected(&nodes[0].node.get_our_node_id(), false);
@@ -3889,7 +3927,7 @@ fn test_funding_peer_disconnect() {
                _ => panic!("Unexpected event"),
        };
 
-       reconnect_nodes(&nodes[0], &nodes[1], (true, true), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
+       reconnect_nodes(&nodes[0], &nodes[1], (true, true), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 
        nodes[0].node.handle_funding_locked(&nodes[1].node.get_our_node_id(), &funding_locked);
        nodes[0].node.handle_announcement_signatures(&nodes[1].node.get_our_node_id(), &bs_announcement_sigs);
@@ -3967,7 +4005,7 @@ fn test_funding_peer_disconnect() {
        nodes[0].node = &nodes_0_deserialized;
        check_added_monitors!(nodes[0], 1);
 
-       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
+       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 
        // as_announcement should be re-generated exactly by broadcast_node_announcement.
        nodes[0].node.broadcast_node_announcement([0, 0, 0], [0; 32], Vec::new());
@@ -4115,10 +4153,15 @@ fn test_drop_messages_peer_disconnect_dual_htlc() {
        let events_5 = nodes[1].node.get_and_clear_pending_events();
        assert_eq!(events_5.len(), 1);
        match events_5[0] {
-               Event::PaymentReceived { ref payment_hash, ref payment_preimage, ref payment_secret, amt: _, user_payment_id: _ } => {
+               Event::PaymentReceived { ref payment_hash, ref purpose, .. } => {
                        assert_eq!(payment_hash_2, *payment_hash);
-                       assert!(payment_preimage.is_none());
-                       assert_eq!(payment_secret_2, *payment_secret);
+                       match &purpose {
+                               PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
+                                       assert!(payment_preimage.is_none());
+                                       assert_eq!(payment_secret_2, *payment_secret);
+                               },
+                               _ => panic!("expected PaymentPurpose::InvoicePayment")
+                       }
                },
                _ => panic!("Unexpected event"),
        }
@@ -4148,13 +4191,13 @@ fn do_test_htlc_timeout(send_partial_mpp: bool) {
                // Use the utility function send_payment_along_path to send the payment with MPP data which
                // indicates there are more HTLCs coming.
                let cur_height = CHAN_CONFIRM_DEPTH + 1; // route_payment calls send_payment, which adds 1 to the current height. So we do the same here to match.
-               nodes[0].node.send_payment_along_path(&route.paths[0], &our_payment_hash, &Some(payment_secret), 200000, cur_height).unwrap();
+               nodes[0].node.send_payment_along_path(&route.paths[0], &our_payment_hash, &Some(payment_secret), 200000, cur_height, &None).unwrap();
                check_added_monitors!(nodes[0], 1);
                let mut events = nodes[0].node.get_and_clear_pending_msg_events();
                assert_eq!(events.len(), 1);
                // Now do the relevant commitment_signed/RAA dances along the path, noting that the final
                // hop should *not* yet generate any PaymentReceived event(s).
-               pass_along_path(&nodes[0], &[&nodes[1]], 100000, our_payment_hash, payment_secret, events.drain(..).next().unwrap(), false);
+               pass_along_path(&nodes[0], &[&nodes[1]], 100000, our_payment_hash, Some(payment_secret), events.drain(..).next().unwrap(), false, None);
                our_payment_hash
        } else {
                route_payment(&nodes[0], &[&nodes[1]], 100000).1
@@ -4203,7 +4246,7 @@ fn do_test_holding_cell_htlc_add_timeouts(forwarded_htlc: bool) {
        let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
        let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
        create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
-       create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
+       let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
 
        // Make sure all nodes are at the same starting height
        connect_blocks(&nodes[0], 2*CHAN_CONFIRM_DEPTH + 1 - nodes[0].best_block_info().1);
@@ -4259,14 +4302,7 @@ fn do_test_holding_cell_htlc_add_timeouts(forwarded_htlc: bool) {
                        _ => unreachable!(),
                }
                expect_payment_failed!(nodes[0], second_payment_hash, false);
-               if let &MessageSendEvent::PaymentFailureNetworkUpdate { ref update } = &nodes[0].node.get_and_clear_pending_msg_events()[0] {
-                       match update {
-                               &HTLCFailChannelUpdate::ChannelUpdateMessage { .. } => {},
-                               _ => panic!("Unexpected event"),
-                       }
-               } else {
-                       panic!("Unexpected event");
-               }
+               expect_payment_failure_chan_update!(nodes[0], chan_2.0.contents.short_channel_id, false);
        } else {
                expect_payment_failed!(nodes[1], second_payment_hash, true);
        }
@@ -4376,7 +4412,7 @@ fn test_no_txn_manager_serialize_deserialize() {
        nodes[0].chain_monitor.chain_monitor.monitors.read().unwrap().iter().next().unwrap().1.write(&mut chan_0_monitor_serialized).unwrap();
 
        logger = test_utils::TestLogger::new();
-       fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: 253 };
+       fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
        persister = test_utils::TestPersister::new();
        let keys_manager = &chanmon_cfgs[0].keys_manager;
        new_chain_monitor = test_utils::TestChainMonitor::new(Some(nodes[0].chain_source), nodes[0].tx_broadcaster.clone(), &logger, &fee_estimator, &persister, keys_manager);
@@ -4591,7 +4627,7 @@ fn test_manager_serialize_deserialize_events() {
        let mut chan_0_monitor_serialized = test_utils::TestVecWriter(Vec::new());
        nodes[0].chain_monitor.chain_monitor.monitors.read().unwrap().iter().next().unwrap().1.write(&mut chan_0_monitor_serialized).unwrap();
 
-       fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: 253 };
+       fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
        logger = test_utils::TestLogger::new();
        persister = test_utils::TestPersister::new();
        let keys_manager = &chanmon_cfgs[0].keys_manager;
@@ -4679,7 +4715,7 @@ fn test_simple_manager_serialize_deserialize() {
        nodes[0].chain_monitor.chain_monitor.monitors.read().unwrap().iter().next().unwrap().1.write(&mut chan_0_monitor_serialized).unwrap();
 
        logger = test_utils::TestLogger::new();
-       fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: 253 };
+       fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
        persister = test_utils::TestPersister::new();
        let keys_manager = &chanmon_cfgs[0].keys_manager;
        new_chain_monitor = test_utils::TestChainMonitor::new(Some(nodes[0].chain_source), nodes[0].tx_broadcaster.clone(), &logger, &fee_estimator, &persister, keys_manager);
@@ -4710,7 +4746,7 @@ fn test_simple_manager_serialize_deserialize() {
        nodes[0].node = &nodes_0_deserialized;
        check_added_monitors!(nodes[0], 1);
 
-       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
+       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
 
        fail_payment(&nodes[0], &[&nodes[1]], our_payment_hash);
        claim_payment(&nodes[0], &[&nodes[1]], our_payment_preimage);
@@ -4759,7 +4795,7 @@ fn test_manager_serialize_deserialize_inconsistent_monitor() {
        }
 
        logger = test_utils::TestLogger::new();
-       fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: 253 };
+       fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
        persister = test_utils::TestPersister::new();
        let keys_manager = &chanmon_cfgs[0].keys_manager;
        new_chain_monitor = test_utils::TestChainMonitor::new(Some(nodes[0].chain_source), nodes[0].tx_broadcaster.clone(), &logger, &fee_estimator, &persister, keys_manager);
@@ -4824,8 +4860,8 @@ fn test_manager_serialize_deserialize_inconsistent_monitor() {
        nodes[0].node = &nodes_0_deserialized;
 
        // nodes[1] and nodes[2] have no lost state with nodes[0]...
-       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
-       reconnect_nodes(&nodes[0], &nodes[2], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
+       reconnect_nodes(&nodes[0], &nodes[1], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
+       reconnect_nodes(&nodes[0], &nodes[2], (false, false), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
        //... and we can even still claim the payment!
        claim_payment(&nodes[2], &[&nodes[0], &nodes[1]], our_payment_preimage);
 
@@ -4846,7 +4882,7 @@ fn test_manager_serialize_deserialize_inconsistent_monitor() {
 }
 
 macro_rules! check_spendable_outputs {
-       ($node: expr, $der_idx: expr, $keysinterface: expr, $chan_value: expr) => {
+       ($node: expr, $keysinterface: expr) => {
                {
                        let mut events = $node.chain_monitor.chain_monitor.get_and_clear_pending_events();
                        let mut txn = Vec::new();
@@ -4893,7 +4929,7 @@ fn test_claim_sizeable_push_msat() {
        mine_transaction(&nodes[1], &node_txn[0]);
        connect_blocks(&nodes[1], BREAKDOWN_TIMEOUT as u32 - 1);
 
-       let spend_txn = check_spendable_outputs!(nodes[1], 1, node_cfgs[1].keys_manager, 100000);
+       let spend_txn = check_spendable_outputs!(nodes[1], node_cfgs[1].keys_manager);
        assert_eq!(spend_txn.len(), 1);
        assert_eq!(spend_txn[0].input.len(), 1);
        check_spends!(spend_txn[0], node_txn[0]);
@@ -4924,7 +4960,7 @@ fn test_claim_on_remote_sizeable_push_msat() {
        check_added_monitors!(nodes[1], 1);
        connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 
-       let spend_txn = check_spendable_outputs!(nodes[1], 1, node_cfgs[1].keys_manager, 100000);
+       let spend_txn = check_spendable_outputs!(nodes[1], node_cfgs[1].keys_manager);
        assert_eq!(spend_txn.len(), 1);
        check_spends!(spend_txn[0], node_txn[0]);
 }
@@ -4954,7 +4990,7 @@ fn test_claim_on_remote_revoked_sizeable_push_msat() {
        mine_transaction(&nodes[1], &node_txn[0]);
        connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 
-       let spend_txn = check_spendable_outputs!(nodes[1], 1, node_cfgs[1].keys_manager, 100000);
+       let spend_txn = check_spendable_outputs!(nodes[1], node_cfgs[1].keys_manager);
        assert_eq!(spend_txn.len(), 3);
        check_spends!(spend_txn[0], revoked_local_txn[0]); // to_remote output on revoked remote commitment_tx
        check_spends!(spend_txn[1], node_txn[0]);
@@ -5003,7 +5039,7 @@ fn test_static_spendable_outputs_preimage_tx() {
        mine_transaction(&nodes[1], &node_txn[0]);
        connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 
-       let spend_txn = check_spendable_outputs!(nodes[1], 1, node_cfgs[1].keys_manager, 100000);
+       let spend_txn = check_spendable_outputs!(nodes[1], node_cfgs[1].keys_manager);
        assert_eq!(spend_txn.len(), 1);
        check_spends!(spend_txn[0], node_txn[0]);
 }
@@ -5048,7 +5084,7 @@ fn test_static_spendable_outputs_timeout_tx() {
        connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
        expect_payment_failed!(nodes[1], our_payment_hash, true);
 
-       let spend_txn = check_spendable_outputs!(nodes[1], 1, node_cfgs[1].keys_manager, 100000);
+       let spend_txn = check_spendable_outputs!(nodes[1], node_cfgs[1].keys_manager);
        assert_eq!(spend_txn.len(), 3); // SpendableOutput: remote_commitment_tx.to_remote, timeout_tx.output
        check_spends!(spend_txn[0], commitment_tx[0]);
        check_spends!(spend_txn[1], node_txn[1]);
@@ -5084,7 +5120,7 @@ fn test_static_spendable_outputs_justice_tx_revoked_commitment_tx() {
        mine_transaction(&nodes[1], &node_txn[0]);
        connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 
-       let spend_txn = check_spendable_outputs!(nodes[1], 1, node_cfgs[1].keys_manager, 100000);
+       let spend_txn = check_spendable_outputs!(nodes[1], node_cfgs[1].keys_manager);
        assert_eq!(spend_txn.len(), 1);
        check_spends!(spend_txn[0], node_txn[0]);
 }
@@ -5151,7 +5187,7 @@ fn test_static_spendable_outputs_justice_tx_revoked_htlc_timeout_tx() {
        connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 
        // Check B's ChannelMonitor was able to generate the right spendable output descriptor
-       let spend_txn = check_spendable_outputs!(nodes[1], 1, node_cfgs[1].keys_manager, 100000);
+       let spend_txn = check_spendable_outputs!(nodes[1], node_cfgs[1].keys_manager);
        assert_eq!(spend_txn.len(), 1);
        assert_eq!(spend_txn[0].input.len(), 1);
        check_spends!(spend_txn[0], node_txn[1]);
@@ -5226,7 +5262,7 @@ fn test_static_spendable_outputs_justice_tx_revoked_htlc_success_tx() {
        // didn't try to generate any new transactions.
 
        // Check A's ChannelMonitor was able to generate the right spendable output descriptor
-       let spend_txn = check_spendable_outputs!(nodes[0], 1, node_cfgs[0].keys_manager, 100000);
+       let spend_txn = check_spendable_outputs!(nodes[0], node_cfgs[0].keys_manager);
        assert_eq!(spend_txn.len(), 3);
        assert_eq!(spend_txn[0].input.len(), 1);
        check_spends!(spend_txn[0], revoked_local_txn[0]); // spending to_remote output from revoked local tx
@@ -5357,7 +5393,12 @@ fn test_duplicate_payment_hash_one_failure_one_success() {
        // we forward one of the payments onwards to D.
        let chanmon_cfgs = create_chanmon_cfgs(4);
        let node_cfgs = create_node_cfgs(4, &chanmon_cfgs);
-       let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs, &[None, None, None, None]);
+       // When this test was written, the default base fee floated based on the HTLC count.
+       // It is now fixed, so we simply set the fee to the expected value here.
+       let mut config = test_default_channel_config();
+       config.channel_options.forwarding_fee_base_msat = 196;
+       let node_chanmgrs = create_node_chanmgrs(4, &node_cfgs,
+               &[Some(config.clone()), Some(config.clone()), Some(config.clone()), Some(config.clone())]);
        let mut nodes = create_network(4, &node_cfgs, &node_chanmgrs);
 
        create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
@@ -5451,13 +5492,7 @@ fn test_duplicate_payment_hash_one_failure_one_success() {
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
        {
                commitment_signed_dance!(nodes[0], nodes[1], &htlc_updates.commitment_signed, false, true);
-               let events = nodes[0].node.get_and_clear_pending_msg_events();
-               assert_eq!(events.len(), 1);
-               match events[0] {
-                       MessageSendEvent::PaymentFailureNetworkUpdate { update: msgs::HTLCFailChannelUpdate::ChannelClosed { .. }  } => {
-                       },
-                       _ => { panic!("Unexpected event"); }
-               }
+               expect_payment_failure_chan_update!(nodes[0], chan_2.0.contents.short_channel_id, true);
        }
        expect_payment_failed!(nodes[0], duplicate_payment_hash, false);
 
@@ -5528,7 +5563,7 @@ fn test_dynamic_spendable_outputs_local_htlc_success_tx() {
        connect_blocks(&nodes[1], BREAKDOWN_TIMEOUT as u32 - 1);
 
        // Verify that B is able to spend its own HTLC-Success tx thanks to spendable output event given back by its ChannelMonitor
-       let spend_txn = check_spendable_outputs!(nodes[1], 1, node_cfgs[1].keys_manager, 100000);
+       let spend_txn = check_spendable_outputs!(nodes[1], node_cfgs[1].keys_manager);
        assert_eq!(spend_txn.len(), 1);
        assert_eq!(spend_txn[0].input.len(), 1);
        check_spends!(spend_txn[0], node_tx);
@@ -5550,7 +5585,12 @@ fn do_test_fail_backwards_unrevoked_remote_announce(deliver_last_raa: bool, anno
        // And test where C fails back to A/B when D announces its latest commitment transaction
        let chanmon_cfgs = create_chanmon_cfgs(6);
        let node_cfgs = create_node_cfgs(6, &chanmon_cfgs);
-       let node_chanmgrs = create_node_chanmgrs(6, &node_cfgs, &[None, None, None, None, None, None]);
+       // When this test was written, the default base fee floated based on the HTLC count.
+       // It is now fixed, so we simply set the fee to the expected value here.
+       let mut config = test_default_channel_config();
+       config.channel_options.forwarding_fee_base_msat = 196;
+       let node_chanmgrs = create_node_chanmgrs(6, &node_cfgs,
+               &[Some(config.clone()), Some(config.clone()), Some(config.clone()), Some(config.clone()), Some(config.clone()), Some(config.clone())]);
        let nodes = create_network(6, &node_cfgs, &node_chanmgrs);
        let logger = test_utils::TestLogger::new();
 
@@ -5826,7 +5866,7 @@ fn test_dynamic_spendable_outputs_local_htlc_timeout_tx() {
        expect_payment_failed!(nodes[0], our_payment_hash, true);
 
        // Verify that A is able to spend its own HTLC-Timeout tx thanks to spendable output event given back by its ChannelMonitor
-       let spend_txn = check_spendable_outputs!(nodes[0], 1, node_cfgs[0].keys_manager, 100000);
+       let spend_txn = check_spendable_outputs!(nodes[0], node_cfgs[0].keys_manager);
        assert_eq!(spend_txn.len(), 3);
        check_spends!(spend_txn[0], local_txn[0]);
        assert_eq!(spend_txn[1].input.len(), 1);
@@ -5907,7 +5947,7 @@ fn test_key_derivation_params() {
 
        // Verify that A is able to spend its own HTLC-Timeout tx thanks to spendable output event given back by its ChannelMonitor
        let new_keys_manager = test_utils::TestKeysInterface::new(&seed, Network::Testnet);
-       let spend_txn = check_spendable_outputs!(nodes[0], 1, new_keys_manager, 100000);
+       let spend_txn = check_spendable_outputs!(nodes[0], new_keys_manager);
        assert_eq!(spend_txn.len(), 3);
        check_spends!(spend_txn[0], local_txn_1[0]);
        assert_eq!(spend_txn[1].input.len(), 1);
@@ -5934,14 +5974,14 @@ fn test_static_output_closing_tx() {
        mine_transaction(&nodes[0], &closing_tx);
        connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
 
-       let spend_txn = check_spendable_outputs!(nodes[0], 2, node_cfgs[0].keys_manager, 100000);
+       let spend_txn = check_spendable_outputs!(nodes[0], node_cfgs[0].keys_manager);
        assert_eq!(spend_txn.len(), 1);
        check_spends!(spend_txn[0], closing_tx);
 
        mine_transaction(&nodes[1], &closing_tx);
        connect_blocks(&nodes[1], ANTI_REORG_DELAY - 1);
 
-       let spend_txn = check_spendable_outputs!(nodes[1], 2, node_cfgs[1].keys_manager, 100000);
+       let spend_txn = check_spendable_outputs!(nodes[1], node_cfgs[1].keys_manager);
        assert_eq!(spend_txn.len(), 1);
        check_spends!(spend_txn[0], closing_tx);
 }
@@ -6251,8 +6291,9 @@ fn test_fail_holding_cell_htlc_upon_free() {
        // us to surface its failure to the user.
        chan_stat = get_channel_value_stat!(nodes[0], chan.2);
        assert_eq!(chan_stat.holding_cell_outbound_amount_msat, 0);
-       nodes[0].logger.assert_log("lightning::ln::channel".to_string(), "Freeing holding cell with 1 HTLC updates".to_string(), 1);
-       let failure_log = format!("Failed to send HTLC with payment_hash {} due to Cannot send value that would put our balance under counterparty-announced channel reserve value ({})", log_bytes!(our_payment_hash.0), chan_stat.channel_reserve_msat);
+       nodes[0].logger.assert_log("lightning::ln::channel".to_string(), format!("Freeing holding cell with 1 HTLC updates in channel {}", hex::encode(chan.2)), 1);
+       let failure_log = format!("Failed to send HTLC with payment_hash {} due to Cannot send value that would put our balance under counterparty-announced channel reserve value ({}) in channel {}",
+               hex::encode(our_payment_hash.0), chan_stat.channel_reserve_msat, hex::encode(chan.2));
        nodes[0].logger.assert_log("lightning::ln::channel".to_string(), failure_log.to_string(), 1);
 
        // Check that the payment failed to be sent out.
@@ -6331,8 +6372,9 @@ fn test_free_and_fail_holding_cell_htlcs() {
        // to surface its failure to the user. The first payment should succeed.
        chan_stat = get_channel_value_stat!(nodes[0], chan.2);
        assert_eq!(chan_stat.holding_cell_outbound_amount_msat, 0);
-       nodes[0].logger.assert_log("lightning::ln::channel".to_string(), "Freeing holding cell with 2 HTLC updates".to_string(), 1);
-       let failure_log = format!("Failed to send HTLC with payment_hash {} due to Cannot send value that would put our balance under counterparty-announced channel reserve value ({})", log_bytes!(payment_hash_2.0), chan_stat.channel_reserve_msat);
+       nodes[0].logger.assert_log("lightning::ln::channel".to_string(), format!("Freeing holding cell with 2 HTLC updates in channel {}", hex::encode(chan.2)), 1);
+       let failure_log = format!("Failed to send HTLC with payment_hash {} due to Cannot send value that would put our balance under counterparty-announced channel reserve value ({}) in channel {}",
+               hex::encode(payment_hash_2.0), chan_stat.channel_reserve_msat, hex::encode(chan.2));
        nodes[0].logger.assert_log("lightning::ln::channel".to_string(), failure_log.to_string(), 1);
 
        // Check that the second payment failed to be sent out.
@@ -6398,7 +6440,11 @@ fn test_free_and_fail_holding_cell_htlcs() {
 fn test_fail_holding_cell_htlc_upon_free_multihop() {
        let chanmon_cfgs = create_chanmon_cfgs(3);
        let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
-       let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
+       // When this test was written, the default base fee floated based on the HTLC count.
+       // It is now fixed, so we simply set the fee to the expected value here.
+       let mut config = test_default_channel_config();
+       config.channel_options.forwarding_fee_base_msat = 196;
+       let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[Some(config.clone()), Some(config.clone()), Some(config.clone())]);
        let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
        let chan_0_1 = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 95000000, InitFeatures::known(), InitFeatures::known());
        let chan_1_2 = create_announced_chan_between_nodes_with_value(&nodes, 1, 2, 100000, 95000000, InitFeatures::known(), InitFeatures::known());
@@ -6514,20 +6560,8 @@ fn test_fail_holding_cell_htlc_upon_free_multihop() {
                _ => panic!("Unexpected event"),
        };
        nodes[0].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &raa);
-       let fail_msg_event = nodes[0].node.get_and_clear_pending_msg_events();
-       assert_eq!(fail_msg_event.len(), 1);
-       match &fail_msg_event[0] {
-               &MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
-               _ => panic!("Unexpected event"),
-       }
-       let failure_event = nodes[0].node.get_and_clear_pending_events();
-       assert_eq!(failure_event.len(), 1);
-       match &failure_event[0] {
-               &Event::PaymentFailed { rejected_by_dest, .. } => {
-                       assert!(!rejected_by_dest);
-               },
-               _ => panic!("Unexpected event"),
-       }
+       expect_payment_failure_chan_update!(nodes[0], chan_1_2.0.contents.short_channel_id, false);
+       expect_payment_failed!(nodes[0], our_payment_hash, false);
        check_added_monitors!(nodes[0], 1);
 }
 
@@ -6783,7 +6817,7 @@ fn test_update_add_htlc_bolt2_receiver_check_max_htlc_limit() {
 
        let cur_height = nodes[0].node.best_block.read().unwrap().height() + 1;
        let onion_keys = onion_utils::construct_onion_keys(&Secp256k1::signing_only(), &route.paths[0], &session_priv).unwrap();
-       let (onion_payloads, _htlc_msat, htlc_cltv) = onion_utils::build_onion_payloads(&route.paths[0], 3999999, &Some(our_payment_secret), cur_height).unwrap();
+       let (onion_payloads, _htlc_msat, htlc_cltv) = onion_utils::build_onion_payloads(&route.paths[0], 3999999, &Some(our_payment_secret), cur_height, &None).unwrap();
        let onion_packet = onion_utils::construct_onion_packet(onion_payloads, onion_keys, [0; 32], &our_payment_hash);
 
        let mut msg = msgs::UpdateAddHTLC {
@@ -7628,7 +7662,7 @@ fn test_user_configurable_csv_delay() {
        let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
 
        // We test config.our_to_self > BREAKDOWN_TIMEOUT is enforced in Channel::new_outbound()
-       if let Err(error) = Channel::new_outbound(&&test_utils::TestFeeEstimator { sat_per_kw: 253 }, &nodes[0].keys_manager, nodes[1].node.get_our_node_id(), 1000000, 1000000, 0, &low_our_to_self_config) {
+       if let Err(error) = Channel::new_outbound(&&test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) }, &nodes[0].keys_manager, nodes[1].node.get_our_node_id(), 1000000, 1000000, 0, &low_our_to_self_config) {
                match error {
                        APIError::APIMisuseError { err } => { assert!(regex::Regex::new(r"Configured with an unreasonable our_to_self_delay \(\d+\) putting user funds at risks").unwrap().is_match(err.as_str())); },
                        _ => panic!("Unexpected event"),
@@ -7639,7 +7673,7 @@ fn test_user_configurable_csv_delay() {
        nodes[1].node.create_channel(nodes[0].node.get_our_node_id(), 1000000, 1000000, 42, None).unwrap();
        let mut open_channel = get_event_msg!(nodes[1], MessageSendEvent::SendOpenChannel, nodes[0].node.get_our_node_id());
        open_channel.to_self_delay = 200;
-       if let Err(error) = Channel::new_from_req(&&test_utils::TestFeeEstimator { sat_per_kw: 253 }, &nodes[0].keys_manager, nodes[1].node.get_our_node_id(), InitFeatures::known(), &open_channel, 0, &low_our_to_self_config) {
+       if let Err(error) = Channel::new_from_req(&&test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) }, &nodes[0].keys_manager, nodes[1].node.get_our_node_id(), InitFeatures::known(), &open_channel, 0, &low_our_to_self_config) {
                match error {
                        ChannelError::Close(err) => { assert!(regex::Regex::new(r"Configured with an unreasonable our_to_self_delay \(\d+\) putting user funds at risks").unwrap().is_match(err.as_str()));  },
                        _ => panic!("Unexpected event"),
@@ -7665,7 +7699,7 @@ fn test_user_configurable_csv_delay() {
        nodes[1].node.create_channel(nodes[0].node.get_our_node_id(), 1000000, 1000000, 42, None).unwrap();
        let mut open_channel = get_event_msg!(nodes[1], MessageSendEvent::SendOpenChannel, nodes[0].node.get_our_node_id());
        open_channel.to_self_delay = 200;
-       if let Err(error) = Channel::new_from_req(&&test_utils::TestFeeEstimator { sat_per_kw: 253 }, &nodes[0].keys_manager, nodes[1].node.get_our_node_id(), InitFeatures::known(), &open_channel, 0, &high_their_to_self_config) {
+       if let Err(error) = Channel::new_from_req(&&test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) }, &nodes[0].keys_manager, nodes[1].node.get_our_node_id(), InitFeatures::known(), &open_channel, 0, &high_their_to_self_config) {
                match error {
                        ChannelError::Close(err) => { assert!(regex::Regex::new(r"They wanted our payments to be delayed by a needlessly long period\. Upper limit: \d+\. Actual: \d+").unwrap().is_match(err.as_str())); },
                        _ => panic!("Unexpected event"),
@@ -7715,7 +7749,7 @@ fn test_data_loss_protect() {
        let mut chain_monitor = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(&mut ::std::io::Cursor::new(previous_chain_monitor_state.0), keys_manager).unwrap().1;
        chain_source = test_utils::TestChainSource::new(Network::Testnet);
        tx_broadcaster = test_utils::TestBroadcaster{txn_broadcasted: Mutex::new(Vec::new()), blocks: Arc::new(Mutex::new(Vec::new()))};
-       fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: 253 };
+       fee_estimator = test_utils::TestFeeEstimator { sat_per_kw: Mutex::new(253) };
        persister = test_utils::TestPersister::new();
        monitor = test_utils::TestChainMonitor::new(Some(&chain_source), &tx_broadcaster, &logger, &fee_estimator, &persister, keys_manager);
        node_state_0 = {
@@ -7783,7 +7817,7 @@ fn test_data_loss_protect() {
        assert_eq!(node_txn[0].output.len(), 2);
        mine_transaction(&nodes[0], &node_txn[0]);
        connect_blocks(&nodes[0], ANTI_REORG_DELAY - 1);
-       let spend_txn = check_spendable_outputs!(nodes[0], 1, node_cfgs[0].keys_manager, 1000000);
+       let spend_txn = check_spendable_outputs!(nodes[0], node_cfgs[0].keys_manager);
        assert_eq!(spend_txn.len(), 1);
        check_spends!(spend_txn[0], node_txn[0]);
 }
@@ -7926,6 +7960,168 @@ fn test_announce_disable_channels() {
        }
 }
 
+#[test]
+fn test_priv_forwarding_rejection() {
+       // If we have a private channel with outbound liquidity, and
+       // UserConfig::accept_forwards_to_priv_channels is set to false, we should reject any attempts
+       // to forward through that channel.
+       let chanmon_cfgs = create_chanmon_cfgs(3);
+       let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
+       let mut no_announce_cfg = test_default_channel_config();
+       no_announce_cfg.channel_options.announced_channel = false;
+       no_announce_cfg.accept_forwards_to_priv_channels = false;
+       let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, Some(no_announce_cfg), None]);
+       let persister: test_utils::TestPersister;
+       let new_chain_monitor: test_utils::TestChainMonitor;
+       let nodes_1_deserialized: ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>;
+       let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
+
+       create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 1_000_000, 500_000_000, InitFeatures::known(), InitFeatures::known());
+
+       // Note that the create_*_chan functions in utils requires announcement_signatures, which we do
+       // not send for private channels.
+       nodes[1].node.create_channel(nodes[2].node.get_our_node_id(), 1_000_000, 500_000_000, 42, None).unwrap();
+       let open_channel = get_event_msg!(nodes[1], MessageSendEvent::SendOpenChannel, nodes[2].node.get_our_node_id());
+       nodes[2].node.handle_open_channel(&nodes[1].node.get_our_node_id(), InitFeatures::known(), &open_channel);
+       let accept_channel = get_event_msg!(nodes[2], MessageSendEvent::SendAcceptChannel, nodes[1].node.get_our_node_id());
+       nodes[1].node.handle_accept_channel(&nodes[2].node.get_our_node_id(), InitFeatures::known(), &accept_channel);
+
+       let (temporary_channel_id, tx, _) = create_funding_transaction(&nodes[1], 1_000_000, 42);
+       nodes[1].node.funding_transaction_generated(&temporary_channel_id, tx.clone()).unwrap();
+       nodes[2].node.handle_funding_created(&nodes[1].node.get_our_node_id(), &get_event_msg!(nodes[1], MessageSendEvent::SendFundingCreated, nodes[2].node.get_our_node_id()));
+       check_added_monitors!(nodes[2], 1);
+
+       nodes[1].node.handle_funding_signed(&nodes[2].node.get_our_node_id(), &get_event_msg!(nodes[2], MessageSendEvent::SendFundingSigned, nodes[1].node.get_our_node_id()));
+       check_added_monitors!(nodes[1], 1);
+
+       let conf_height = core::cmp::max(nodes[1].best_block_info().1 + 1, nodes[2].best_block_info().1 + 1);
+       confirm_transaction_at(&nodes[1], &tx, conf_height);
+       connect_blocks(&nodes[1], CHAN_CONFIRM_DEPTH - 1);
+       confirm_transaction_at(&nodes[2], &tx, conf_height);
+       connect_blocks(&nodes[2], CHAN_CONFIRM_DEPTH - 1);
+       let as_funding_locked = get_event_msg!(nodes[1], MessageSendEvent::SendFundingLocked, nodes[2].node.get_our_node_id());
+       nodes[1].node.handle_funding_locked(&nodes[2].node.get_our_node_id(), &get_event_msg!(nodes[2], MessageSendEvent::SendFundingLocked, nodes[1].node.get_our_node_id()));
+       get_event_msg!(nodes[1], MessageSendEvent::SendChannelUpdate, nodes[2].node.get_our_node_id());
+       nodes[2].node.handle_funding_locked(&nodes[1].node.get_our_node_id(), &as_funding_locked);
+       get_event_msg!(nodes[2], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
+
+       assert!(nodes[0].node.list_usable_channels()[0].is_public);
+       assert_eq!(nodes[1].node.list_usable_channels().len(), 2);
+       assert!(!nodes[2].node.list_usable_channels()[0].is_public);
+
+       // We should always be able to forward through nodes[1] as long as its out through a public
+       // channel:
+       send_payment(&nodes[2], &[&nodes[1], &nodes[0]], 10_000);
+
+       // ... however, if we send to nodes[2], we will have to pass the private channel from nodes[1]
+       // to nodes[2], which should be rejected:
+       let (our_payment_preimage, our_payment_hash, our_payment_secret) = get_payment_preimage_hash!(nodes[2]);
+       let route = get_route(&nodes[0].node.get_our_node_id(),
+               &nodes[0].net_graph_msg_handler.network_graph.read().unwrap(),
+               &nodes[2].node.get_our_node_id(), Some(InvoiceFeatures::known()), None,
+               &[&RouteHint(vec![RouteHintHop {
+                       src_node_id: nodes[1].node.get_our_node_id(),
+                       short_channel_id: nodes[2].node.list_channels()[0].short_channel_id.unwrap(),
+                       fees: RoutingFees { base_msat: 1000, proportional_millionths: 0 },
+                       cltv_expiry_delta: MIN_CLTV_EXPIRY_DELTA,
+                       htlc_minimum_msat: None,
+                       htlc_maximum_msat: None,
+               }])], 10_000, TEST_FINAL_CLTV, nodes[0].logger).unwrap();
+
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
+       check_added_monitors!(nodes[0], 1);
+       let payment_event = SendEvent::from_event(nodes[0].node.get_and_clear_pending_msg_events().remove(0));
+       nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
+       commitment_signed_dance!(nodes[1], nodes[0], payment_event.commitment_msg, false, true);
+
+       let htlc_fail_updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
+       assert!(htlc_fail_updates.update_add_htlcs.is_empty());
+       assert_eq!(htlc_fail_updates.update_fail_htlcs.len(), 1);
+       assert!(htlc_fail_updates.update_fail_malformed_htlcs.is_empty());
+       assert!(htlc_fail_updates.update_fee.is_none());
+
+       nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &htlc_fail_updates.update_fail_htlcs[0]);
+       commitment_signed_dance!(nodes[0], nodes[1], htlc_fail_updates.commitment_signed, true, true);
+       expect_payment_failed!(nodes[0], our_payment_hash, false);
+       expect_payment_failure_chan_update!(nodes[0], nodes[2].node.list_channels()[0].short_channel_id.unwrap(), true);
+
+       // Now disconnect nodes[1] from its peers and restart with accept_forwards_to_priv_channels set
+       // to true. Sadly there is currently no way to change it at runtime.
+
+       nodes[0].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
+       nodes[2].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
+
+       let nodes_1_serialized = nodes[1].node.encode();
+       let mut monitor_a_serialized = test_utils::TestVecWriter(Vec::new());
+       let mut monitor_b_serialized = test_utils::TestVecWriter(Vec::new());
+       {
+               let mons = nodes[1].chain_monitor.chain_monitor.monitors.read().unwrap();
+               let mut mon_iter = mons.iter();
+               mon_iter.next().unwrap().1.write(&mut monitor_a_serialized).unwrap();
+               mon_iter.next().unwrap().1.write(&mut monitor_b_serialized).unwrap();
+       }
+
+       persister = test_utils::TestPersister::new();
+       let keys_manager = &chanmon_cfgs[1].keys_manager;
+       new_chain_monitor = test_utils::TestChainMonitor::new(Some(nodes[1].chain_source), nodes[1].tx_broadcaster.clone(), nodes[1].logger, node_cfgs[1].fee_estimator, &persister, keys_manager);
+       nodes[1].chain_monitor = &new_chain_monitor;
+
+       let mut monitor_a_read = &monitor_a_serialized.0[..];
+       let mut monitor_b_read = &monitor_b_serialized.0[..];
+       let (_, mut monitor_a) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(&mut monitor_a_read, keys_manager).unwrap();
+       let (_, mut monitor_b) = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(&mut monitor_b_read, keys_manager).unwrap();
+       assert!(monitor_a_read.is_empty());
+       assert!(monitor_b_read.is_empty());
+
+       no_announce_cfg.accept_forwards_to_priv_channels = true;
+
+       let mut nodes_1_read = &nodes_1_serialized[..];
+       let (_, nodes_1_deserialized_tmp) = {
+               let mut channel_monitors = HashMap::new();
+               channel_monitors.insert(monitor_a.get_funding_txo().0, &mut monitor_a);
+               channel_monitors.insert(monitor_b.get_funding_txo().0, &mut monitor_b);
+               <(BlockHash, ChannelManager<EnforcingSigner, &test_utils::TestChainMonitor, &test_utils::TestBroadcaster, &test_utils::TestKeysInterface, &test_utils::TestFeeEstimator, &test_utils::TestLogger>)>::read(&mut nodes_1_read, ChannelManagerReadArgs {
+                       default_config: no_announce_cfg,
+                       keys_manager,
+                       fee_estimator: node_cfgs[1].fee_estimator,
+                       chain_monitor: nodes[1].chain_monitor,
+                       tx_broadcaster: nodes[1].tx_broadcaster.clone(),
+                       logger: nodes[1].logger,
+                       channel_monitors,
+               }).unwrap()
+       };
+       assert!(nodes_1_read.is_empty());
+       nodes_1_deserialized = nodes_1_deserialized_tmp;
+
+       assert!(nodes[1].chain_monitor.watch_channel(monitor_a.get_funding_txo().0, monitor_a).is_ok());
+       assert!(nodes[1].chain_monitor.watch_channel(monitor_b.get_funding_txo().0, monitor_b).is_ok());
+       check_added_monitors!(nodes[1], 2);
+       nodes[1].node = &nodes_1_deserialized;
+
+       nodes[0].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init { features: InitFeatures::known() });
+       nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init { features: InitFeatures::empty() });
+       let as_reestablish = get_event_msg!(nodes[0], MessageSendEvent::SendChannelReestablish, nodes[1].node.get_our_node_id());
+       let bs_reestablish = get_event_msg!(nodes[1], MessageSendEvent::SendChannelReestablish, nodes[0].node.get_our_node_id());
+       nodes[1].node.handle_channel_reestablish(&nodes[0].node.get_our_node_id(), &as_reestablish);
+       nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &bs_reestablish);
+       get_event_msg!(nodes[0], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
+       get_event_msg!(nodes[1], MessageSendEvent::SendChannelUpdate, nodes[0].node.get_our_node_id());
+
+       nodes[1].node.peer_connected(&nodes[2].node.get_our_node_id(), &msgs::Init { features: InitFeatures::known() });
+       nodes[2].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init { features: InitFeatures::empty() });
+       let bs_reestablish = get_event_msg!(nodes[1], MessageSendEvent::SendChannelReestablish, nodes[2].node.get_our_node_id());
+       let cs_reestablish = get_event_msg!(nodes[2], MessageSendEvent::SendChannelReestablish, nodes[1].node.get_our_node_id());
+       nodes[2].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &bs_reestablish);
+       nodes[1].node.handle_channel_reestablish(&nodes[2].node.get_our_node_id(), &cs_reestablish);
+       get_event_msg!(nodes[1], MessageSendEvent::SendChannelUpdate, nodes[2].node.get_our_node_id());
+       get_event_msg!(nodes[2], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
+
+       nodes[0].node.send_payment(&route, our_payment_hash, &Some(our_payment_secret)).unwrap();
+       check_added_monitors!(nodes[0], 1);
+       pass_along_route(&nodes[0], &[&[&nodes[1], &nodes[2]]], 10_000, our_payment_hash, our_payment_secret);
+       claim_payment(&nodes[0], &[&nodes[1], &nodes[2]], our_payment_preimage);
+}
+
 #[test]
 fn test_bump_penalty_txn_on_revoked_commitment() {
        // In case of penalty txn with too low feerates for getting into mempools, RBF-bump them to be sure
@@ -8472,9 +8668,14 @@ fn test_preimage_storage() {
        let events = nodes[1].node.get_and_clear_pending_events();
        assert_eq!(events.len(), 1);
        match events[0] {
-               Event::PaymentReceived { payment_preimage, user_payment_id, .. } => {
-                       assert_eq!(user_payment_id, 42);
-                       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage.unwrap());
+               Event::PaymentReceived { ref purpose, .. } => {
+                       match &purpose {
+                               PaymentPurpose::InvoicePayment { payment_preimage, user_payment_id, .. } => {
+                                       assert_eq!(*user_payment_id, 42);
+                                       claim_payment(&nodes[0], &[&nodes[1]], payment_preimage.unwrap());
+                               },
+                               _ => panic!("expected PaymentPurpose::InvoicePayment")
+                       }
                },
                _ => panic!("Unexpected event"),
        }
@@ -8538,7 +8739,7 @@ fn test_secret_timeout() {
        let events = nodes[1].node.get_and_clear_pending_events();
        assert_eq!(events.len(), 1);
        match events[0] {
-               Event::PaymentReceived { payment_preimage, payment_secret, user_payment_id, .. } => {
+               Event::PaymentReceived { purpose: PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, user_payment_id }, .. } => {
                        assert!(payment_preimage.is_none());
                        assert_eq!(user_payment_id, 42);
                        assert_eq!(payment_secret, our_payment_secret);
@@ -9315,3 +9516,143 @@ fn test_invalid_funding_tx() {
        } else { panic!(); }
        assert_eq!(nodes[1].node.list_channels().len(), 0);
 }
+
+fn do_test_tx_confirmed_skipping_blocks_immediate_broadcast(test_height_before_timelock: bool) {
+       // In the first version of the chain::Confirm interface, after a refactor was made to not
+       // broadcast CSV-locked transactions until their CSV lock is up, we wouldn't reliably broadcast
+       // transactions after a `transactions_confirmed` call. Specifically, if the chain, provided via
+       // `best_block_updated` is at height N, and a transaction output which we wish to spend at
+       // height N-1 (due to a CSV to height N-1) is provided at height N, we will not broadcast the
+       // spending transaction until height N+1 (or greater). This was due to the way
+       // `ChannelMonitor::transactions_confirmed` worked, only checking if we should broadcast a
+       // spending transaction at the height the input transaction was confirmed at, not whether we
+       // should broadcast a spending transaction at the current height.
+       // A second, similar, issue involved failing HTLCs backwards - because we only provided the
+       // height at which transactions were confirmed to `OnchainTx::update_claims_view`, it wasn't
+       // aware that the anti-reorg-delay had, in fact, already expired, waiting to fail-backwards
+       // until we learned about an additional block.
+       //
+       // As an additional check, if `test_height_before_timelock` is set, we instead test that we
+       // aren't broadcasting transactions too early (ie not broadcasting them at all).
+       let chanmon_cfgs = create_chanmon_cfgs(3);
+       let node_cfgs = create_node_cfgs(3, &chanmon_cfgs);
+       let node_chanmgrs = create_node_chanmgrs(3, &node_cfgs, &[None, None, None]);
+       let mut nodes = create_network(3, &node_cfgs, &node_chanmgrs);
+       *nodes[0].connect_style.borrow_mut() = ConnectStyle::BestBlockFirstSkippingBlocks;
+
+       create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
+       let (chan_announce, _, channel_id, _) = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known());
+       let (_, payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 1_000_000);
+       nodes[1].node.peer_disconnected(&nodes[2].node.get_our_node_id(), false);
+       nodes[2].node.peer_disconnected(&nodes[1].node.get_our_node_id(), false);
+
+       nodes[1].node.force_close_channel(&channel_id).unwrap();
+       check_closed_broadcast!(nodes[1], true);
+       check_added_monitors!(nodes[1], 1);
+       let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
+       assert_eq!(node_txn.len(), 1);
+
+       let conf_height = nodes[1].best_block_info().1;
+       if !test_height_before_timelock {
+               connect_blocks(&nodes[1], 24 * 6);
+       }
+       nodes[1].chain_monitor.chain_monitor.transactions_confirmed(
+               &nodes[1].get_block_header(conf_height), &[(0, &node_txn[0])], conf_height);
+       if test_height_before_timelock {
+               // If we confirmed the close transaction, but timelocks have not yet expired, we should not
+               // generate any events or broadcast any transactions
+               assert!(nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().is_empty());
+               assert!(nodes[1].chain_monitor.chain_monitor.get_and_clear_pending_events().is_empty());
+       } else {
+               // We should broadcast an HTLC transaction spending our funding transaction first
+               let spending_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
+               assert_eq!(spending_txn.len(), 2);
+               assert_eq!(spending_txn[0], node_txn[0]);
+               check_spends!(spending_txn[1], node_txn[0]);
+               // We should also generate a SpendableOutputs event with the to_self output (as its
+               // timelock is up).
+               let descriptor_spend_txn = check_spendable_outputs!(nodes[1], node_cfgs[1].keys_manager);
+               assert_eq!(descriptor_spend_txn.len(), 1);
+
+               // If we also discover that the HTLC-Timeout transaction was confirmed some time ago, we
+               // should immediately fail-backwards the HTLC to the previous hop, without waiting for an
+               // additional block built on top of the current chain.
+               nodes[1].chain_monitor.chain_monitor.transactions_confirmed(
+                       &nodes[1].get_block_header(conf_height + 1), &[(0, &spending_txn[1])], conf_height + 1);
+               expect_pending_htlcs_forwardable!(nodes[1]);
+               check_added_monitors!(nodes[1], 1);
+
+               let updates = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
+               assert!(updates.update_add_htlcs.is_empty());
+               assert!(updates.update_fulfill_htlcs.is_empty());
+               assert_eq!(updates.update_fail_htlcs.len(), 1);
+               assert!(updates.update_fail_malformed_htlcs.is_empty());
+               assert!(updates.update_fee.is_none());
+               nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fail_htlcs[0]);
+               commitment_signed_dance!(nodes[0], nodes[1], updates.commitment_signed, true, true);
+               expect_payment_failed!(nodes[0], payment_hash, false);
+               expect_payment_failure_chan_update!(nodes[0], chan_announce.contents.short_channel_id, true);
+       }
+}
+
+#[test]
+fn test_tx_confirmed_skipping_blocks_immediate_broadcast() {
+       do_test_tx_confirmed_skipping_blocks_immediate_broadcast(false);
+       do_test_tx_confirmed_skipping_blocks_immediate_broadcast(true);
+}
+
+#[test]
+fn test_keysend_payments_to_public_node() {
+       let chanmon_cfgs = create_chanmon_cfgs(2);
+       let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
+       let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
+       let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
+
+       let _chan = create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, 10001, InitFeatures::known(), InitFeatures::known());
+       let network_graph = nodes[0].net_graph_msg_handler.network_graph.read().unwrap();
+       let payer_pubkey = nodes[0].node.get_our_node_id();
+       let payee_pubkey = nodes[1].node.get_our_node_id();
+       let route = get_route(&payer_pubkey, &network_graph, &payee_pubkey, None,
+                        None, &vec![], 10000, 40,
+                        nodes[0].logger).unwrap();
+
+       let test_preimage = PaymentPreimage([42; 32]);
+       let payment_hash = nodes[0].node.send_spontaneous_payment(&route, Some(test_preimage)).unwrap();
+       check_added_monitors!(nodes[0], 1);
+       let mut events = nodes[0].node.get_and_clear_pending_msg_events();
+       assert_eq!(events.len(), 1);
+       let event = events.pop().unwrap();
+       let path = vec![&nodes[1]];
+       pass_along_path(&nodes[0], &path, 10000, payment_hash, None, event, true, Some(test_preimage));
+       claim_payment(&nodes[0], &path, test_preimage);
+}
+
+#[test]
+fn test_keysend_payments_to_private_node() {
+       let chanmon_cfgs = create_chanmon_cfgs(2);
+       let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
+       let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
+       let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
+
+       let payer_pubkey = nodes[0].node.get_our_node_id();
+       let payee_pubkey = nodes[1].node.get_our_node_id();
+       nodes[0].node.peer_connected(&payee_pubkey, &msgs::Init { features: InitFeatures::known() });
+       nodes[1].node.peer_connected(&payer_pubkey, &msgs::Init { features: InitFeatures::known() });
+
+       let _chan = create_chan_between_nodes(&nodes[0], &nodes[1], InitFeatures::known(), InitFeatures::known());
+       let network_graph = nodes[0].net_graph_msg_handler.network_graph.read().unwrap();
+       let first_hops = nodes[0].node.list_usable_channels();
+       let route = get_keysend_route(&payer_pubkey, &network_graph, &payee_pubkey,
+                                Some(&first_hops.iter().collect::<Vec<_>>()), &vec![], 10000, 40,
+                                nodes[0].logger).unwrap();
+
+       let test_preimage = PaymentPreimage([42; 32]);
+       let payment_hash = nodes[0].node.send_spontaneous_payment(&route, Some(test_preimage)).unwrap();
+       check_added_monitors!(nodes[0], 1);
+       let mut events = nodes[0].node.get_and_clear_pending_msg_events();
+       assert_eq!(events.len(), 1);
+       let event = events.pop().unwrap();
+       let path = vec![&nodes[1]];
+       pass_along_path(&nodes[0], &path, 10000, payment_hash, None, event, true, Some(test_preimage));
+       claim_payment(&nodes[0], &path, test_preimage);
+}