Send initial closing_signed message asynchronously and handle errs
[rust-lightning] / lightning / src / ln / chanmon_update_fail_tests.rs
index 2e758aa48c82a0eecf1a9761741cf37e81ecabc6..ee9a492746b4a93436b9620c78f15b3f1a6b4694 100644 (file)
@@ -13,6 +13,7 @@
 //! here. See also the chanmon_fail_consistency fuzz test.
 
 use bitcoin::blockdata::block::{Block, BlockHeader};
+use bitcoin::blockdata::constants::genesis_block;
 use bitcoin::hash_types::BlockHash;
 use bitcoin::network::constants::Network;
 use chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdateErr};
@@ -27,9 +28,10 @@ use ln::msgs::{ChannelMessageHandler, ErrorAction, RoutingMessageHandler};
 use routing::router::get_route;
 use util::config::UserConfig;
 use util::enforcing_trait_impls::EnforcingSigner;
-use util::events::{Event, MessageSendEvent, MessageSendEventsProvider};
+use util::events::{Event, MessageSendEvent, MessageSendEventsProvider, PaymentPurpose};
 use util::errors::APIError;
 use util::ser::{ReadableArgs, Writeable};
+use util::test_utils::TestBroadcaster;
 
 use bitcoin::hashes::sha256::Hash as Sha256;
 use bitcoin::hashes::Hash;
@@ -38,7 +40,9 @@ use ln::functional_test_utils::*;
 
 use util::test_utils;
 
-use std::collections::HashMap;
+use io;
+use prelude::*;
+use sync::{Arc, Mutex};
 
 // If persister_fail is true, we have the persister return a PermanentFailure
 // instead of the higher-level ChainMonitor.
@@ -106,15 +110,22 @@ fn test_monitor_and_persister_update_fail() {
        let chain_source = test_utils::TestChainSource::new(Network::Testnet);
        let logger = test_utils::TestLogger::with_id(format!("node {}", 0));
        let persister = test_utils::TestPersister::new();
+       let tx_broadcaster = TestBroadcaster {
+               txn_broadcasted: Mutex::new(Vec::new()),
+               // Because we will connect a block at height 200 below, we need the TestBroadcaster to know
+               // that we are at height 200 so that it doesn't think we're violating the time lock
+               // requirements of transactions broadcasted at that point.
+               blocks: Arc::new(Mutex::new(vec![(genesis_block(Network::Testnet).header, 200); 200])),
+       };
        let chain_mon = {
                let monitors = nodes[0].chain_monitor.chain_monitor.monitors.read().unwrap();
                let monitor = monitors.get(&outpoint).unwrap();
                let mut w = test_utils::TestVecWriter(Vec::new());
                monitor.write(&mut w).unwrap();
                let new_monitor = <(BlockHash, ChannelMonitor<EnforcingSigner>)>::read(
-                       &mut ::std::io::Cursor::new(&w.0), &test_utils::OnlyReadsKeysInterface {}).unwrap().1;
+                       &mut io::Cursor::new(&w.0), &test_utils::OnlyReadsKeysInterface {}).unwrap().1;
                assert!(new_monitor == *monitor);
-               let chain_mon = test_utils::TestChainMonitor::new(Some(&chain_source), &chanmon_cfgs[0].tx_broadcaster, &logger, &chanmon_cfgs[0].fee_estimator, &persister, &node_cfgs[0].keys_manager);
+               let chain_mon = test_utils::TestChainMonitor::new(Some(&chain_source), &tx_broadcaster, &logger, &chanmon_cfgs[0].fee_estimator, &persister, &node_cfgs[0].keys_manager);
                assert!(chain_mon.watch_channel(outpoint, new_monitor).is_ok());
                chain_mon
        };
@@ -131,7 +142,7 @@ fn test_monitor_and_persister_update_fail() {
        assert_eq!(updates.update_fulfill_htlcs.len(), 1);
        nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &updates.update_fulfill_htlcs[0]);
        if let Some(ref mut channel) = nodes[0].node.channel_state.lock().unwrap().by_id.get_mut(&chan.2) {
-               if let Ok((_, _, _, update)) = channel.commitment_signed(&updates.commitment_signed, &node_cfgs[0].fee_estimator, &node_cfgs[0].logger) {
+               if let Ok((_, _, update)) = channel.commitment_signed(&updates.commitment_signed, &node_cfgs[0].logger) {
                        // Check that even though the persister is returning a TemporaryFailure,
                        // because the update is bogus, ultimately the error that's returned
                        // should be a PermanentFailure.
@@ -187,7 +198,7 @@ fn do_test_simple_monitor_temporary_update_fail(disconnect: bool, persister_fail
        if 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));
        }
 
        match persister_fail {
@@ -210,11 +221,16 @@ fn do_test_simple_monitor_temporary_update_fail(disconnect: bool, persister_fail
        let events_3 = nodes[1].node.get_and_clear_pending_events();
        assert_eq!(events_3.len(), 1);
        match events_3[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"),
        }
@@ -241,7 +257,7 @@ fn do_test_simple_monitor_temporary_update_fail(disconnect: bool, persister_fail
        if 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));
        }
 
        // ...and make sure we can force-close a frozen channel
@@ -579,11 +595,16 @@ fn do_test_monitor_temporary_update_fail(disconnect_count: usize) {
        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, amt } => {
                        assert_eq!(payment_hash_2, *payment_hash);
-                       assert!(payment_preimage.is_none());
-                       assert_eq!(payment_secret_2, *payment_secret);
                        assert_eq!(amt, 1000000);
+                       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"),
        }
@@ -694,11 +715,16 @@ fn test_monitor_update_fail_cs() {
        let events = nodes[1].node.get_and_clear_pending_events();
        assert_eq!(events.len(), 1);
        match events[0] {
-               Event::PaymentReceived { payment_hash, payment_preimage, payment_secret, amt, user_payment_id: _ } => {
+               Event::PaymentReceived { payment_hash, ref purpose, amt } => {
                        assert_eq!(payment_hash, our_payment_hash);
-                       assert!(payment_preimage.is_none());
-                       assert_eq!(our_payment_secret, payment_secret);
                        assert_eq!(amt, 1000000);
+                       match &purpose {
+                               PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
+                                       assert!(payment_preimage.is_none());
+                                       assert_eq!(our_payment_secret, *payment_secret);
+                               },
+                               _ => panic!("expected PaymentPurpose::InvoicePayment")
+                       }
                },
                _ => panic!("Unexpected event"),
        };
@@ -895,8 +921,8 @@ fn do_test_monitor_update_fail_raa(test_ignore_second_cs: bool) {
        assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
        check_added_monitors!(nodes[1], 1);
 
-       // Attempt to forward a third payment but fail due to the second channel being unavailable
-       // for forwarding.
+       // Forward a third payment which will also be added to the holding cell, despite the channel
+       // being paused waiting a monitor update.
        let (_, payment_hash_3, payment_secret_3) = get_payment_preimage_hash!(nodes[2]);
        {
                let net_graph_msg_handler = &nodes[0].net_graph_msg_handler;
@@ -911,39 +937,11 @@ fn do_test_monitor_update_fail_raa(test_ignore_second_cs: bool) {
        commitment_signed_dance!(nodes[1], nodes[0], send_event.commitment_msg, false, true);
        check_added_monitors!(nodes[1], 0);
 
-       let mut events_2 = nodes[1].node.get_and_clear_pending_msg_events();
-       assert_eq!(events_2.len(), 1);
-       match events_2.remove(0) {
-               MessageSendEvent::UpdateHTLCs { node_id, updates } => {
-                       assert_eq!(node_id, nodes[0].node.get_our_node_id());
-                       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_add_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, false, true);
-
-                       let msg_events = nodes[0].node.get_and_clear_pending_msg_events();
-                       assert_eq!(msg_events.len(), 1);
-                       match msg_events[0] {
-                               MessageSendEvent::PaymentFailureNetworkUpdate { update: msgs::HTLCFailChannelUpdate::ChannelUpdateMessage { ref msg }} => {
-                                       assert_eq!(msg.contents.short_channel_id, chan_2.0.contents.short_channel_id);
-                                       assert_eq!(msg.contents.flags & 2, 2); // temp disabled
-                               },
-                               _ => panic!("Unexpected event"),
-                       }
-
-                       let events = nodes[0].node.get_and_clear_pending_events();
-                       assert_eq!(events.len(), 1);
-                       if let Event::PaymentFailed { payment_hash, rejected_by_dest, .. } = events[0] {
-                               assert_eq!(payment_hash, payment_hash_3);
-                               assert!(!rejected_by_dest);
-                       } else { panic!("Unexpected event!"); }
-               },
-               _ => panic!("Unexpected event type!"),
-       };
+       // Call forward_pending_htlcs and check that the new HTLC was simply added to the holding cell
+       // and not forwarded.
+       expect_pending_htlcs_forwardable!(nodes[1]);
+       check_added_monitors!(nodes[1], 0);
+       assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
 
        let (payment_preimage_4, payment_hash_4) = if test_ignore_second_cs {
                // Try to route another payment backwards from 2 to make sure 1 holds off on responding
@@ -960,7 +958,6 @@ fn do_test_monitor_update_fail_raa(test_ignore_second_cs: bool) {
                assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
                nodes[1].logger.assert_log("lightning::ln::channelmanager".to_string(), "Previous monitor update failure prevented generation of RAA".to_string(), 1);
                assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
-               assert!(nodes[1].node.get_and_clear_pending_events().is_empty());
                (Some(payment_preimage_4), Some(payment_hash_4))
        } else { (None, None) };
 
@@ -1010,14 +1007,10 @@ fn do_test_monitor_update_fail_raa(test_ignore_second_cs: bool) {
 
        nodes[0].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &messages_a.0);
        commitment_signed_dance!(nodes[0], nodes[1], messages_a.1, false);
-       let events_4 = nodes[0].node.get_and_clear_pending_events();
-       assert_eq!(events_4.len(), 1);
-       if let Event::PaymentFailed { payment_hash, rejected_by_dest, .. } = events_4[0] {
-               assert_eq!(payment_hash, payment_hash_1);
-               assert!(rejected_by_dest);
-       } else { panic!("Unexpected event!"); }
+       expect_payment_failed!(nodes[0], payment_hash_1, true);
 
        nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &send_event_b.msgs[0]);
+       let as_cs;
        if test_ignore_second_cs {
                nodes[2].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &send_event_b.commitment_msg);
                check_added_monitors!(nodes[2], 1);
@@ -1033,40 +1026,83 @@ fn do_test_monitor_update_fail_raa(test_ignore_second_cs: bool) {
 
                nodes[1].node.handle_revoke_and_ack(&nodes[2].node.get_our_node_id(), &bs_revoke_and_ack);
                check_added_monitors!(nodes[1], 1);
-               let as_cs = get_htlc_update_msgs!(nodes[1], nodes[2].node.get_our_node_id());
-               assert!(as_cs.update_add_htlcs.is_empty());
-               assert!(as_cs.update_fail_htlcs.is_empty());
-               assert!(as_cs.update_fail_malformed_htlcs.is_empty());
-               assert!(as_cs.update_fulfill_htlcs.is_empty());
-               assert!(as_cs.update_fee.is_none());
+               as_cs = get_htlc_update_msgs!(nodes[1], nodes[2].node.get_our_node_id());
 
                nodes[1].node.handle_commitment_signed(&nodes[2].node.get_our_node_id(), &bs_cs.commitment_signed);
                check_added_monitors!(nodes[1], 1);
-               let as_raa = get_event_msg!(nodes[1], MessageSendEvent::SendRevokeAndACK, nodes[2].node.get_our_node_id());
-
-               nodes[2].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &as_cs.commitment_signed);
+       } else {
+               nodes[2].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &send_event_b.commitment_msg);
                check_added_monitors!(nodes[2], 1);
-               let bs_second_raa = get_event_msg!(nodes[2], MessageSendEvent::SendRevokeAndACK, nodes[1].node.get_our_node_id());
 
-               nodes[2].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &as_raa);
-               check_added_monitors!(nodes[2], 1);
-               assert!(nodes[2].node.get_and_clear_pending_msg_events().is_empty());
+               let bs_revoke_and_commit = nodes[2].node.get_and_clear_pending_msg_events();
+               assert_eq!(bs_revoke_and_commit.len(), 2);
+               match bs_revoke_and_commit[0] {
+                       MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
+                               assert_eq!(*node_id, nodes[1].node.get_our_node_id());
+                               nodes[1].node.handle_revoke_and_ack(&nodes[2].node.get_our_node_id(), &msg);
+                               check_added_monitors!(nodes[1], 1);
+                       },
+                       _ => panic!("Unexpected event"),
+               }
 
-               nodes[1].node.handle_revoke_and_ack(&nodes[2].node.get_our_node_id(), &bs_second_raa);
-               check_added_monitors!(nodes[1], 1);
-               assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
-       } else {
-               commitment_signed_dance!(nodes[2], nodes[1], send_event_b.commitment_msg, false);
+               as_cs = get_htlc_update_msgs!(nodes[1], nodes[2].node.get_our_node_id());
+
+               match bs_revoke_and_commit[1] {
+                       MessageSendEvent::UpdateHTLCs { ref node_id, ref updates } => {
+                               assert_eq!(*node_id, nodes[1].node.get_our_node_id());
+                               assert!(updates.update_add_htlcs.is_empty());
+                               assert!(updates.update_fail_htlcs.is_empty());
+                               assert!(updates.update_fail_malformed_htlcs.is_empty());
+                               assert!(updates.update_fulfill_htlcs.is_empty());
+                               assert!(updates.update_fee.is_none());
+                               nodes[1].node.handle_commitment_signed(&nodes[2].node.get_our_node_id(), &updates.commitment_signed);
+                               check_added_monitors!(nodes[1], 1);
+                       },
+                       _ => panic!("Unexpected event"),
+               }
        }
 
+       assert_eq!(as_cs.update_add_htlcs.len(), 1);
+       assert!(as_cs.update_fail_htlcs.is_empty());
+       assert!(as_cs.update_fail_malformed_htlcs.is_empty());
+       assert!(as_cs.update_fulfill_htlcs.is_empty());
+       assert!(as_cs.update_fee.is_none());
+       let as_raa = get_event_msg!(nodes[1], MessageSendEvent::SendRevokeAndACK, nodes[2].node.get_our_node_id());
+
+
+       nodes[2].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &as_cs.update_add_htlcs[0]);
+       nodes[2].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &as_cs.commitment_signed);
+       check_added_monitors!(nodes[2], 1);
+       let bs_second_raa = get_event_msg!(nodes[2], MessageSendEvent::SendRevokeAndACK, nodes[1].node.get_our_node_id());
+
+       nodes[2].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &as_raa);
+       check_added_monitors!(nodes[2], 1);
+       let bs_second_cs = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
+
+       nodes[1].node.handle_revoke_and_ack(&nodes[2].node.get_our_node_id(), &bs_second_raa);
+       check_added_monitors!(nodes[1], 1);
+       assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
+
+       nodes[1].node.handle_commitment_signed(&nodes[2].node.get_our_node_id(), &bs_second_cs.commitment_signed);
+       check_added_monitors!(nodes[1], 1);
+       let as_second_raa = get_event_msg!(nodes[1], MessageSendEvent::SendRevokeAndACK, nodes[2].node.get_our_node_id());
+
+       nodes[2].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &as_second_raa);
+       check_added_monitors!(nodes[2], 1);
+       assert!(nodes[2].node.get_and_clear_pending_msg_events().is_empty());
+
        expect_pending_htlcs_forwardable!(nodes[2]);
 
        let events_6 = nodes[2].node.get_and_clear_pending_events();
-       assert_eq!(events_6.len(), 1);
+       assert_eq!(events_6.len(), 2);
        match events_6[0] {
                Event::PaymentReceived { payment_hash, .. } => { assert_eq!(payment_hash, payment_hash_2); },
                _ => panic!("Unexpected event"),
        };
+       match events_6[1] {
+               Event::PaymentReceived { payment_hash, .. } => { assert_eq!(payment_hash, payment_hash_3); },
+               _ => panic!("Unexpected event"),
+       };
 
        if test_ignore_second_cs {
                expect_pending_htlcs_forwardable!(nodes[1]);
@@ -1124,6 +1160,7 @@ fn test_monitor_update_fail_reestablish() {
        assert!(updates.update_fee.is_none());
        assert_eq!(updates.update_fulfill_htlcs.len(), 1);
        nodes[1].node.handle_update_fulfill_htlc(&nodes[2].node.get_our_node_id(), &updates.update_fulfill_htlcs[0]);
+       expect_payment_forwarded!(nodes[1], Some(1000), false);
        check_added_monitors!(nodes[1], 1);
        assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
        commitment_signed_dance!(nodes[1], nodes[2], updates.commitment_signed, false);
@@ -1138,7 +1175,10 @@ fn test_monitor_update_fail_reestablish() {
        nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &bs_reestablish);
 
        nodes[1].node.handle_channel_reestablish(&nodes[0].node.get_our_node_id(), &as_reestablish);
-       assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
+       assert_eq!(
+               get_event_msg!(nodes[0], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id())
+                       .contents.flags & 2, 0); // The "disabled" bit should be unset as we just reconnected
+
        nodes[1].logger.assert_log("lightning::ln::channelmanager".to_string(), "Failed to update ChannelMonitor".to_string(), 1);
        check_added_monitors!(nodes[1], 1);
 
@@ -1152,10 +1192,15 @@ fn test_monitor_update_fail_reestablish() {
        assert!(bs_reestablish == get_event_msg!(nodes[1], MessageSendEvent::SendChannelReestablish, nodes[0].node.get_our_node_id()));
 
        nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &bs_reestablish);
+       assert_eq!(
+               get_event_msg!(nodes[0], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id())
+                       .contents.flags & 2, 0); // The "disabled" bit should be unset as we just reconnected
 
        nodes[1].node.handle_channel_reestablish(&nodes[0].node.get_our_node_id(), &as_reestablish);
        check_added_monitors!(nodes[1], 0);
-       assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
+       assert_eq!(
+               get_event_msg!(nodes[1], MessageSendEvent::SendChannelUpdate, nodes[0].node.get_our_node_id())
+                       .contents.flags & 2, 0); // The "disabled" bit should be unset as we just reconnected
 
        *nodes[1].chain_monitor.update_ret.lock().unwrap() = Some(Ok(()));
        let (outpoint, latest_update) = nodes[1].chain_monitor.latest_monitor_update_id.lock().unwrap().get(&chan_1.2).unwrap().clone();
@@ -1332,14 +1377,14 @@ fn claim_while_disconnected_monitor_update_fail() {
        let bs_reconnect = get_event_msg!(nodes[1], MessageSendEvent::SendChannelReestablish, nodes[0].node.get_our_node_id());
 
        nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &bs_reconnect);
-       assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
+       let _as_channel_update = get_event_msg!(nodes[0], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
 
        // Now deliver a's reestablish, freeing the claim from the holding cell, but fail the monitor
        // update.
        *nodes[1].chain_monitor.update_ret.lock().unwrap() = Some(Err(ChannelMonitorUpdateErr::TemporaryFailure));
 
        nodes[1].node.handle_channel_reestablish(&nodes[0].node.get_our_node_id(), &as_reconnect);
-       assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
+       let _bs_channel_update = get_event_msg!(nodes[1], MessageSendEvent::SendChannelUpdate, nodes[0].node.get_our_node_id());
        nodes[1].logger.assert_log("lightning::ln::channelmanager".to_string(), "Failed to update ChannelMonitor".to_string(), 1);
        check_added_monitors!(nodes[1], 1);
        assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
@@ -1472,7 +1517,9 @@ fn monitor_failed_no_reestablish_response() {
        let bs_reconnect = 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_reconnect);
+       let _bs_channel_update = get_event_msg!(nodes[1], MessageSendEvent::SendChannelUpdate, nodes[0].node.get_our_node_id());
        nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &bs_reconnect);
+       let _as_channel_update = get_event_msg!(nodes[0], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
 
        *nodes[1].chain_monitor.update_ret.lock().unwrap() = Some(Ok(()));
        let (outpoint, latest_update) = nodes[1].chain_monitor.latest_monitor_update_id.lock().unwrap().get(&channel_id).unwrap().clone();
@@ -1601,9 +1648,9 @@ fn first_message_on_recv_ordering() {
 fn test_monitor_update_fail_claim() {
        // Basic test for monitor update failures when processing claim_funds calls.
        // We set up a simple 3-node network, sending a payment from A to B and failing B's monitor
-       // update to claim the payment. We then send a payment C->B->A, making the forward of this
-       // payment from B to A fail due to the paused channel. Finally, we restore the channel monitor
-       // updating and claim the payment on B.
+       // update to claim the payment. We then send two payments C->B->A, which are held at B.
+       // Finally, we restore the channel monitor updating and claim the payment on B, forwarding
+       // the payments from C onwards to A.
        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]);
@@ -1619,12 +1666,19 @@ fn test_monitor_update_fail_claim() {
 
        *nodes[1].chain_monitor.update_ret.lock().unwrap() = Some(Err(ChannelMonitorUpdateErr::TemporaryFailure));
        assert!(nodes[1].node.claim_funds(payment_preimage_1));
+       nodes[1].logger.assert_log("lightning::ln::channelmanager".to_string(), "Temporary failure claiming HTLC, treating as success: Failed to update ChannelMonitor".to_string(), 1);
        check_added_monitors!(nodes[1], 1);
 
+       // Note that at this point there is a pending commitment transaction update for A being held by
+       // B. Even when we go to send the payment from C through B to A, B will not update this
+       // already-signed commitment transaction and will instead wait for it to resolve before
+       // forwarding the payment onwards.
+
        let (_, payment_hash_2, payment_secret_2) = get_payment_preimage_hash!(nodes[0]);
+       let route;
        {
                let net_graph_msg_handler = &nodes[2].net_graph_msg_handler;
-               let route = get_route(&nodes[2].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(), 1000000, TEST_FINAL_CLTV, &logger).unwrap();
+               route = get_route(&nodes[2].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(), 1_000_000, TEST_FINAL_CLTV, &logger).unwrap();
                nodes[2].node.send_payment(&route, payment_hash_2, &Some(payment_secret_2)).unwrap();
                check_added_monitors!(nodes[2], 1);
        }
@@ -1639,29 +1693,19 @@ fn test_monitor_update_fail_claim() {
        nodes[1].node.handle_update_add_htlc(&nodes[2].node.get_our_node_id(), &payment_event.msgs[0]);
        let events = nodes[1].node.get_and_clear_pending_msg_events();
        assert_eq!(events.len(), 0);
-       nodes[1].logger.assert_log("lightning::ln::channelmanager".to_string(), "Temporary failure claiming HTLC, treating as success: Failed to update ChannelMonitor".to_string(), 1);
        commitment_signed_dance!(nodes[1], nodes[2], payment_event.commitment_msg, false, true);
 
-       let bs_fail_update = get_htlc_update_msgs!(nodes[1], nodes[2].node.get_our_node_id());
-       nodes[2].node.handle_update_fail_htlc(&nodes[1].node.get_our_node_id(), &bs_fail_update.update_fail_htlcs[0]);
-       commitment_signed_dance!(nodes[2], nodes[1], bs_fail_update.commitment_signed, false, true);
-
-       let msg_events = nodes[2].node.get_and_clear_pending_msg_events();
-       assert_eq!(msg_events.len(), 1);
-       match msg_events[0] {
-               MessageSendEvent::PaymentFailureNetworkUpdate { update: msgs::HTLCFailChannelUpdate::ChannelUpdateMessage { ref msg }} => {
-                       assert_eq!(msg.contents.short_channel_id, chan_1.0.contents.short_channel_id);
-                       assert_eq!(msg.contents.flags & 2, 2); // temp disabled
-               },
-               _ => panic!("Unexpected event"),
-       }
+       let (_, payment_hash_3, payment_secret_3) = get_payment_preimage_hash!(nodes[0]);
+       nodes[2].node.send_payment(&route, payment_hash_3, &Some(payment_secret_3)).unwrap();
+       check_added_monitors!(nodes[2], 1);
 
-       let events = nodes[2].node.get_and_clear_pending_events();
+       let mut events = nodes[2].node.get_and_clear_pending_msg_events();
        assert_eq!(events.len(), 1);
-       if let Event::PaymentFailed { payment_hash, rejected_by_dest, .. } = events[0] {
-               assert_eq!(payment_hash, payment_hash_2);
-               assert!(!rejected_by_dest);
-       } else { panic!("Unexpected event!"); }
+       let payment_event = SendEvent::from_event(events.pop().unwrap());
+       nodes[1].node.handle_update_add_htlc(&nodes[2].node.get_our_node_id(), &payment_event.msgs[0]);
+       let events = nodes[1].node.get_and_clear_pending_msg_events();
+       assert_eq!(events.len(), 0);
+       commitment_signed_dance!(nodes[1], nodes[2], payment_event.commitment_msg, false, true);
 
        // Now restore monitor updating on the 0<->1 channel and claim the funds on B.
        let (outpoint, latest_update) = nodes[1].chain_monitor.latest_monitor_update_id.lock().unwrap().get(&chan_1.2).unwrap().clone();
@@ -1671,12 +1715,47 @@ fn test_monitor_update_fail_claim() {
        let bs_fulfill_update = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
        nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &bs_fulfill_update.update_fulfill_htlcs[0]);
        commitment_signed_dance!(nodes[0], nodes[1], bs_fulfill_update.commitment_signed, false);
+       expect_payment_sent!(nodes[0], payment_preimage_1);
+
+       // Get the payment forwards, note that they were batched into one commitment update.
+       expect_pending_htlcs_forwardable!(nodes[1]);
+       check_added_monitors!(nodes[1], 1);
+       let bs_forward_update = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
+       nodes[0].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &bs_forward_update.update_add_htlcs[0]);
+       nodes[0].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &bs_forward_update.update_add_htlcs[1]);
+       commitment_signed_dance!(nodes[0], nodes[1], bs_forward_update.commitment_signed, false);
+       expect_pending_htlcs_forwardable!(nodes[0]);
 
        let events = nodes[0].node.get_and_clear_pending_events();
-       assert_eq!(events.len(), 1);
-       if let Event::PaymentSent { payment_preimage, .. } = events[0] {
-               assert_eq!(payment_preimage, payment_preimage_1);
-       } else { panic!("Unexpected event!"); }
+       assert_eq!(events.len(), 2);
+       match events[0] {
+               Event::PaymentReceived { ref payment_hash, ref purpose, amt } => {
+                       assert_eq!(payment_hash_2, *payment_hash);
+                       assert_eq!(1_000_000, amt);
+                       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"),
+       }
+       match events[1] {
+               Event::PaymentReceived { ref payment_hash, ref purpose, amt } => {
+                       assert_eq!(payment_hash_3, *payment_hash);
+                       assert_eq!(1_000_000, amt);
+                       match &purpose {
+                               PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
+                                       assert!(payment_preimage.is_none());
+                                       assert_eq!(payment_secret_3, *payment_secret);
+                               },
+                               _ => panic!("expected PaymentPurpose::InvoicePayment")
+                       }
+               },
+               _ => panic!("Unexpected event"),
+       }
 }
 
 #[test]
@@ -1870,7 +1949,7 @@ fn do_during_funding_monitor_fail(confirm_a_first: bool, restore_b_before_conf:
        // Make sure nodes[1] isn't stupid enough to re-send the FundingLocked on reconnect
        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, confirm_a_first), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
+       reconnect_nodes(&nodes[0], &nodes[1], (false, confirm_a_first), (0, 0), (0, 0), (0, 0), (0, 0), (0, 0), (false, false));
        assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
        assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
 
@@ -1962,7 +2041,7 @@ fn test_path_paused_mpp() {
        // Pass the first HTLC of the payment along to nodes[3].
        let mut events = nodes[0].node.get_and_clear_pending_msg_events();
        assert_eq!(events.len(), 1);
-       pass_along_path(&nodes[0], &[&nodes[1], &nodes[3]], 0, payment_hash.clone(), payment_secret, events.pop().unwrap(), false);
+       pass_along_path(&nodes[0], &[&nodes[1], &nodes[3]], 0, payment_hash.clone(), Some(payment_secret), events.pop().unwrap(), false, None);
 
        // And check that, after we successfully update the monitor for chan_2 we can pass the second
        // HTLC along to nodes[3] and claim the whole payment back to nodes[0].
@@ -1970,11 +2049,200 @@ fn test_path_paused_mpp() {
        nodes[0].node.channel_monitor_updated(&outpoint, latest_update);
        let mut events = nodes[0].node.get_and_clear_pending_msg_events();
        assert_eq!(events.len(), 1);
-       pass_along_path(&nodes[0], &[&nodes[2], &nodes[3]], 200_000, payment_hash.clone(), payment_secret, events.pop().unwrap(), true);
+       pass_along_path(&nodes[0], &[&nodes[2], &nodes[3]], 200_000, payment_hash.clone(), Some(payment_secret), events.pop().unwrap(), true, None);
 
        claim_payment_along_route(&nodes[0], &[&[&nodes[1], &nodes[3]], &[&nodes[2], &nodes[3]]], false, payment_preimage);
 }
 
+#[test]
+fn test_pending_update_fee_ack_on_reconnect() {
+       // In early versions of our automated fee update patch, nodes did not correctly use the
+       // previous channel feerate after sending an undelivered revoke_and_ack when re-sending an
+       // undelivered commitment_signed.
+       //
+       // B sends A new HTLC + CS, not delivered
+       // A sends B update_fee + CS
+       // B receives the CS and sends RAA, previously causing B to lock in the new feerate
+       // reconnect
+       // B resends initial CS, using the original fee
+
+       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 mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
+
+       create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
+       send_payment(&nodes[0], &[&nodes[1]], 100_000_00);
+
+       let (payment_preimage, payment_hash, payment_secret) = get_payment_preimage_hash!(&nodes[0]);
+       let route = get_route(&nodes[1].node.get_our_node_id(), &nodes[1].net_graph_msg_handler.network_graph.read().unwrap(),
+               &nodes[0].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 1_000_000, TEST_FINAL_CLTV, nodes[1].logger).unwrap();
+       nodes[1].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
+       check_added_monitors!(nodes[1], 1);
+       let bs_initial_send_msgs = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
+       // bs_initial_send_msgs are not delivered until they are re-generated after reconnect
+
+       {
+               let mut feerate_lock = chanmon_cfgs[0].fee_estimator.sat_per_kw.lock().unwrap();
+               *feerate_lock *= 2;
+       }
+       nodes[0].node.timer_tick_occurred();
+       check_added_monitors!(nodes[0], 1);
+       let as_update_fee_msgs = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
+       assert!(as_update_fee_msgs.update_fee.is_some());
+
+       nodes[1].node.handle_update_fee(&nodes[0].node.get_our_node_id(), as_update_fee_msgs.update_fee.as_ref().unwrap());
+       nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &as_update_fee_msgs.commitment_signed);
+       check_added_monitors!(nodes[1], 1);
+       let bs_first_raa = get_event_msg!(nodes[1], MessageSendEvent::SendRevokeAndACK, nodes[0].node.get_our_node_id());
+       // bs_first_raa is not delivered until it is re-generated after reconnect
+
+       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);
+
+       nodes[0].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init { features: InitFeatures::known() });
+       let as_connect_msg = get_event_msg!(nodes[0], MessageSendEvent::SendChannelReestablish, nodes[1].node.get_our_node_id());
+       nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init { features: InitFeatures::known() });
+       let bs_connect_msg = 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_connect_msg);
+       let bs_resend_msgs = nodes[1].node.get_and_clear_pending_msg_events();
+       assert_eq!(bs_resend_msgs.len(), 3);
+       if let MessageSendEvent::UpdateHTLCs { ref updates, .. } = bs_resend_msgs[0] {
+               assert_eq!(*updates, bs_initial_send_msgs);
+       } else { panic!(); }
+       if let MessageSendEvent::SendRevokeAndACK { ref msg, .. } = bs_resend_msgs[1] {
+               assert_eq!(*msg, bs_first_raa);
+       } else { panic!(); }
+       if let MessageSendEvent::SendChannelUpdate { .. } = bs_resend_msgs[2] { } else { panic!(); }
+
+       nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &bs_connect_msg);
+       get_event_msg!(nodes[0], MessageSendEvent::SendChannelUpdate, nodes[1].node.get_our_node_id());
+
+       nodes[0].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &bs_initial_send_msgs.update_add_htlcs[0]);
+       nodes[0].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &bs_initial_send_msgs.commitment_signed);
+       check_added_monitors!(nodes[0], 1);
+       nodes[1].node.handle_revoke_and_ack(&nodes[0].node.get_our_node_id(), &get_event_msg!(nodes[0], MessageSendEvent::SendRevokeAndACK, nodes[1].node.get_our_node_id()));
+       check_added_monitors!(nodes[1], 1);
+       let bs_second_cs = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id()).commitment_signed;
+
+       nodes[0].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &bs_first_raa);
+       check_added_monitors!(nodes[0], 1);
+       nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id()).commitment_signed);
+       check_added_monitors!(nodes[1], 1);
+       let bs_third_raa = get_event_msg!(nodes[1], MessageSendEvent::SendRevokeAndACK, nodes[0].node.get_our_node_id());
+
+       nodes[0].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &bs_second_cs);
+       check_added_monitors!(nodes[0], 1);
+       nodes[0].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &bs_third_raa);
+       check_added_monitors!(nodes[0], 1);
+
+       nodes[1].node.handle_revoke_and_ack(&nodes[0].node.get_our_node_id(), &get_event_msg!(nodes[0], MessageSendEvent::SendRevokeAndACK, nodes[1].node.get_our_node_id()));
+       check_added_monitors!(nodes[1], 1);
+
+       expect_pending_htlcs_forwardable!(nodes[0]);
+       expect_payment_received!(nodes[0], payment_hash, payment_secret, 1_000_000);
+
+       claim_payment(&nodes[1], &[&nodes[0]], payment_preimage);
+}
+
+fn do_update_fee_resend_test(deliver_update: bool, parallel_updates: bool) {
+       // In early versions we did not handle resending of update_fee on reconnect correctly. The
+       // chanmon_consistency fuzz target, of course, immediately found it, but we test a few cases
+       // explicitly here.
+       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 mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
+
+       create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
+       send_payment(&nodes[0], &[&nodes[1]], 1000);
+
+       {
+               let mut feerate_lock = chanmon_cfgs[0].fee_estimator.sat_per_kw.lock().unwrap();
+               *feerate_lock += 20;
+       }
+       nodes[0].node.timer_tick_occurred();
+       check_added_monitors!(nodes[0], 1);
+       let update_msgs = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
+       assert!(update_msgs.update_fee.is_some());
+       if deliver_update {
+               nodes[1].node.handle_update_fee(&nodes[0].node.get_our_node_id(), update_msgs.update_fee.as_ref().unwrap());
+       }
+
+       if parallel_updates {
+               {
+                       let mut feerate_lock = chanmon_cfgs[0].fee_estimator.sat_per_kw.lock().unwrap();
+                       *feerate_lock += 20;
+               }
+               nodes[0].node.timer_tick_occurred();
+               assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
+       }
+
+       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);
+
+       nodes[0].node.peer_connected(&nodes[1].node.get_our_node_id(), &msgs::Init { features: InitFeatures::known() });
+       let as_connect_msg = get_event_msg!(nodes[0], MessageSendEvent::SendChannelReestablish, nodes[1].node.get_our_node_id());
+       nodes[1].node.peer_connected(&nodes[0].node.get_our_node_id(), &msgs::Init { features: InitFeatures::known() });
+       let bs_connect_msg = 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_connect_msg);
+       get_event_msg!(nodes[1], MessageSendEvent::SendChannelUpdate, nodes[0].node.get_our_node_id());
+       assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
+
+       nodes[0].node.handle_channel_reestablish(&nodes[1].node.get_our_node_id(), &bs_connect_msg);
+       let mut as_reconnect_msgs = nodes[0].node.get_and_clear_pending_msg_events();
+       assert_eq!(as_reconnect_msgs.len(), 2);
+       if let MessageSendEvent::SendChannelUpdate { .. } = as_reconnect_msgs.pop().unwrap() {} else { panic!(); }
+       let update_msgs = if let MessageSendEvent::UpdateHTLCs { updates, .. } = as_reconnect_msgs.pop().unwrap()
+               { updates } else { panic!(); };
+       assert!(update_msgs.update_fee.is_some());
+       nodes[1].node.handle_update_fee(&nodes[0].node.get_our_node_id(), update_msgs.update_fee.as_ref().unwrap());
+       if parallel_updates {
+               nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &update_msgs.commitment_signed);
+               check_added_monitors!(nodes[1], 1);
+               let (bs_first_raa, bs_first_cs) = get_revoke_commit_msgs!(nodes[1], nodes[0].node.get_our_node_id());
+               nodes[0].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &bs_first_raa);
+               check_added_monitors!(nodes[0], 1);
+               let as_second_update = get_htlc_update_msgs!(nodes[0], nodes[1].node.get_our_node_id());
+
+               nodes[0].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &bs_first_cs);
+               check_added_monitors!(nodes[0], 1);
+               let as_first_raa = get_event_msg!(nodes[0], MessageSendEvent::SendRevokeAndACK, nodes[1].node.get_our_node_id());
+
+               nodes[1].node.handle_update_fee(&nodes[0].node.get_our_node_id(), as_second_update.update_fee.as_ref().unwrap());
+               nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &as_second_update.commitment_signed);
+               check_added_monitors!(nodes[1], 1);
+               let bs_second_raa = get_event_msg!(nodes[1], MessageSendEvent::SendRevokeAndACK, nodes[0].node.get_our_node_id());
+
+               nodes[1].node.handle_revoke_and_ack(&nodes[0].node.get_our_node_id(), &as_first_raa);
+               let bs_second_cs = get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id());
+               check_added_monitors!(nodes[1], 1);
+
+               nodes[0].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &bs_second_raa);
+               check_added_monitors!(nodes[0], 1);
+
+               nodes[0].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &bs_second_cs.commitment_signed);
+               check_added_monitors!(nodes[0], 1);
+               let as_second_raa = get_event_msg!(nodes[0], MessageSendEvent::SendRevokeAndACK, nodes[1].node.get_our_node_id());
+
+               nodes[1].node.handle_revoke_and_ack(&nodes[0].node.get_our_node_id(), &as_second_raa);
+               check_added_monitors!(nodes[1], 1);
+       } else {
+               commitment_signed_dance!(nodes[1], nodes[0], update_msgs.commitment_signed, false);
+       }
+
+       send_payment(&nodes[0], &[&nodes[1]], 1000);
+}
+#[test]
+fn update_fee_resend_test() {
+       do_update_fee_resend_test(false, false);
+       do_update_fee_resend_test(true, false);
+       do_update_fee_resend_test(false, true);
+       do_update_fee_resend_test(true, true);
+}
+
 fn do_channel_holding_cell_serialize(disconnect: bool, reload_a: bool) {
        // Tests that, when we serialize a channel with AddHTLC entries in the holding cell, we
        // properly free them on reconnect. We previously failed such HTLCs upon serialization, but
@@ -2173,3 +2441,213 @@ fn channel_holding_cell_serialize() {
        do_channel_holding_cell_serialize(true, false);
        do_channel_holding_cell_serialize(false, true); // last arg doesn't matter
 }
+
+#[derive(PartialEq)]
+enum HTLCStatusAtDupClaim {
+       Received,
+       HoldingCell,
+       Cleared,
+}
+fn do_test_reconnect_dup_htlc_claims(htlc_status: HTLCStatusAtDupClaim, second_fails: bool) {
+       // When receiving an update_fulfill_htlc message, we immediately forward the claim backwards
+       // along the payment path before waiting for a full commitment_signed dance. This is great, but
+       // can cause duplicative claims if a node sends an update_fulfill_htlc message, disconnects,
+       // reconnects, and then has to re-send its update_fulfill_htlc message again.
+       // In previous code, we didn't handle the double-claim correctly, spuriously closing the
+       // channel on which the inbound HTLC was received.
+       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);
+
+       create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
+       let chan_2 = create_announced_chan_between_nodes(&nodes, 1, 2, InitFeatures::known(), InitFeatures::known()).2;
+
+       let (payment_preimage, payment_hash, _) = route_payment(&nodes[0], &[&nodes[1], &nodes[2]], 100_000);
+
+       let mut as_raa = None;
+       if htlc_status == HTLCStatusAtDupClaim::HoldingCell {
+               // In order to get the HTLC claim into the holding cell at nodes[1], we need nodes[1] to be
+               // awaiting a remote revoke_and_ack from nodes[0].
+               let (_, second_payment_hash, second_payment_secret) = get_payment_preimage_hash!(nodes[1]);
+               let route = get_route(&nodes[0].node.get_our_node_id(), &nodes[0].net_graph_msg_handler.network_graph.read().unwrap(),
+                       &nodes[1].node.get_our_node_id(), Some(InvoiceFeatures::known()), None, &Vec::new(), 100_000, TEST_FINAL_CLTV, nodes[1].logger).unwrap();
+               nodes[0].node.send_payment(&route, second_payment_hash, &Some(second_payment_secret)).unwrap();
+               check_added_monitors!(nodes[0], 1);
+
+               let send_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(), &send_event.msgs[0]);
+               nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &send_event.commitment_msg);
+               check_added_monitors!(nodes[1], 1);
+
+               let (bs_raa, bs_cs) = get_revoke_commit_msgs!(nodes[1], nodes[0].node.get_our_node_id());
+               nodes[0].node.handle_revoke_and_ack(&nodes[1].node.get_our_node_id(), &bs_raa);
+               check_added_monitors!(nodes[0], 1);
+               nodes[0].node.handle_commitment_signed(&nodes[1].node.get_our_node_id(), &bs_cs);
+               check_added_monitors!(nodes[0], 1);
+
+               as_raa = Some(get_event_msg!(nodes[0], MessageSendEvent::SendRevokeAndACK, nodes[1].node.get_our_node_id()));
+       }
+
+       let fulfill_msg = msgs::UpdateFulfillHTLC {
+               channel_id: chan_2,
+               htlc_id: 0,
+               payment_preimage,
+       };
+       if second_fails {
+               assert!(nodes[2].node.fail_htlc_backwards(&payment_hash));
+               expect_pending_htlcs_forwardable!(nodes[2]);
+               check_added_monitors!(nodes[2], 1);
+               get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
+       } else {
+               assert!(nodes[2].node.claim_funds(payment_preimage));
+               check_added_monitors!(nodes[2], 1);
+               let cs_updates = get_htlc_update_msgs!(nodes[2], nodes[1].node.get_our_node_id());
+               assert_eq!(cs_updates.update_fulfill_htlcs.len(), 1);
+               // Check that the message we're about to deliver matches the one generated:
+               assert_eq!(fulfill_msg, cs_updates.update_fulfill_htlcs[0]);
+       }
+       nodes[1].node.handle_update_fulfill_htlc(&nodes[2].node.get_our_node_id(), &fulfill_msg);
+       expect_payment_forwarded!(nodes[1], Some(1000), false);
+       check_added_monitors!(nodes[1], 1);
+
+       let mut bs_updates = None;
+       if htlc_status != HTLCStatusAtDupClaim::HoldingCell {
+               bs_updates = Some(get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id()));
+               assert_eq!(bs_updates.as_ref().unwrap().update_fulfill_htlcs.len(), 1);
+               nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &bs_updates.as_ref().unwrap().update_fulfill_htlcs[0]);
+               expect_payment_sent!(nodes[0], payment_preimage);
+               if htlc_status == HTLCStatusAtDupClaim::Cleared {
+                       commitment_signed_dance!(nodes[0], nodes[1], &bs_updates.as_ref().unwrap().commitment_signed, false);
+               }
+       } else {
+               assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
+       }
+
+       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);
+
+       if second_fails {
+               reconnect_nodes(&nodes[1], &nodes[2], (false, false), (0, 0), (0, 0), (1, 0), (0, 0), (0, 0), (false, false));
+               expect_pending_htlcs_forwardable!(nodes[1]);
+       } else {
+               reconnect_nodes(&nodes[1], &nodes[2], (false, false), (0, 0), (1, 0), (0, 0), (0, 0), (0, 0), (false, false));
+       }
+
+       if htlc_status == HTLCStatusAtDupClaim::HoldingCell {
+               nodes[1].node.handle_revoke_and_ack(&nodes[0].node.get_our_node_id(), &as_raa.unwrap());
+               check_added_monitors!(nodes[1], 1);
+               expect_pending_htlcs_forwardable_ignore!(nodes[1]); // We finally receive the second payment, but don't claim it
+
+               bs_updates = Some(get_htlc_update_msgs!(nodes[1], nodes[0].node.get_our_node_id()));
+               assert_eq!(bs_updates.as_ref().unwrap().update_fulfill_htlcs.len(), 1);
+               nodes[0].node.handle_update_fulfill_htlc(&nodes[1].node.get_our_node_id(), &bs_updates.as_ref().unwrap().update_fulfill_htlcs[0]);
+               expect_payment_sent!(nodes[0], payment_preimage);
+       }
+       if htlc_status != HTLCStatusAtDupClaim::Cleared {
+               commitment_signed_dance!(nodes[0], nodes[1], &bs_updates.as_ref().unwrap().commitment_signed, false);
+       }
+}
+
+#[test]
+fn test_reconnect_dup_htlc_claims() {
+       do_test_reconnect_dup_htlc_claims(HTLCStatusAtDupClaim::Received, false);
+       do_test_reconnect_dup_htlc_claims(HTLCStatusAtDupClaim::HoldingCell, false);
+       do_test_reconnect_dup_htlc_claims(HTLCStatusAtDupClaim::Cleared, false);
+       do_test_reconnect_dup_htlc_claims(HTLCStatusAtDupClaim::Received, true);
+       do_test_reconnect_dup_htlc_claims(HTLCStatusAtDupClaim::HoldingCell, true);
+       do_test_reconnect_dup_htlc_claims(HTLCStatusAtDupClaim::Cleared, true);
+}
+
+#[test]
+fn test_temporary_error_during_shutdown() {
+       // Test that temporary failures when updating the monitor's shutdown script delay cooperative
+       // close.
+       let mut config = test_default_channel_config();
+       config.channel_options.commit_upfront_shutdown_pubkey = false;
+
+       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, &[Some(config), Some(config)]);
+       let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
+
+       let (_, _, channel_id, funding_tx) = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
+
+       *nodes[0].chain_monitor.update_ret.lock().unwrap() = Some(Err(ChannelMonitorUpdateErr::TemporaryFailure));
+       *nodes[1].chain_monitor.update_ret.lock().unwrap() = Some(Err(ChannelMonitorUpdateErr::TemporaryFailure));
+
+       nodes[0].node.close_channel(&channel_id).unwrap();
+       nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &InitFeatures::known(), &get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id()));
+       check_added_monitors!(nodes[1], 1);
+
+       nodes[0].node.handle_shutdown(&nodes[1].node.get_our_node_id(), &InitFeatures::known(), &get_event_msg!(nodes[1], MessageSendEvent::SendShutdown, nodes[0].node.get_our_node_id()));
+       check_added_monitors!(nodes[0], 1);
+
+       assert!(nodes[0].node.get_and_clear_pending_msg_events().is_empty());
+
+       *nodes[0].chain_monitor.update_ret.lock().unwrap() = None;
+       *nodes[1].chain_monitor.update_ret.lock().unwrap() = None;
+
+       let (outpoint, latest_update) = nodes[0].chain_monitor.latest_monitor_update_id.lock().unwrap().get(&channel_id).unwrap().clone();
+       nodes[0].node.channel_monitor_updated(&outpoint, latest_update);
+       nodes[1].node.handle_closing_signed(&nodes[0].node.get_our_node_id(), &get_event_msg!(nodes[0], MessageSendEvent::SendClosingSigned, nodes[1].node.get_our_node_id()));
+
+       assert!(nodes[1].node.get_and_clear_pending_msg_events().is_empty());
+
+       *nodes[1].chain_monitor.update_ret.lock().unwrap() = None;
+       let (outpoint, latest_update) = nodes[1].chain_monitor.latest_monitor_update_id.lock().unwrap().get(&channel_id).unwrap().clone();
+       nodes[1].node.channel_monitor_updated(&outpoint, latest_update);
+       let (_, closing_signed_b) = get_closing_signed_broadcast!(nodes[1].node, nodes[0].node.get_our_node_id());
+       nodes[0].node.handle_closing_signed(&nodes[1].node.get_our_node_id(), &closing_signed_b.unwrap());
+       let txn_b = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
+
+       let (_, none_a) = get_closing_signed_broadcast!(nodes[0].node, nodes[1].node.get_our_node_id());
+       assert!(none_a.is_none());
+       let txn_a = nodes[0].tx_broadcaster.txn_broadcasted.lock().unwrap().split_off(0);
+
+       assert_eq!(txn_a, txn_b);
+       assert_eq!(txn_a.len(), 1);
+       check_spends!(txn_a[0], funding_tx);
+}
+
+#[test]
+fn test_permanent_error_during_sending_shutdown() {
+       // Test that permanent failures when updating the monitor's shutdown script result in a force
+       // close when initiating a cooperative close.
+       let mut config = test_default_channel_config();
+       config.channel_options.commit_upfront_shutdown_pubkey = false;
+
+       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, &[Some(config), None]);
+       let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
+
+       let channel_id = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()).2;
+       *nodes[0].chain_monitor.update_ret.lock().unwrap() = Some(Err(ChannelMonitorUpdateErr::PermanentFailure));
+
+       assert!(nodes[0].node.close_channel(&channel_id).is_ok());
+       check_closed_broadcast!(nodes[0], true);
+       check_added_monitors!(nodes[0], 2);
+}
+
+#[test]
+fn test_permanent_error_during_handling_shutdown() {
+       // Test that permanent failures when updating the monitor's shutdown script result in a force
+       // close when handling a cooperative close.
+       let mut config = test_default_channel_config();
+       config.channel_options.commit_upfront_shutdown_pubkey = false;
+
+       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, Some(config)]);
+       let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
+
+       let channel_id = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known()).2;
+       *nodes[1].chain_monitor.update_ret.lock().unwrap() = Some(Err(ChannelMonitorUpdateErr::PermanentFailure));
+
+       assert!(nodes[0].node.close_channel(&channel_id).is_ok());
+       let shutdown = get_event_msg!(nodes[0], MessageSendEvent::SendShutdown, nodes[1].node.get_our_node_id());
+       nodes[1].node.handle_shutdown(&nodes[0].node.get_our_node_id(), &InitFeatures::known(), &shutdown);
+       check_closed_broadcast!(nodes[1], true);
+       check_added_monitors!(nodes[1], 2);
+}